mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-28 23:49:44 +08:00
4256 lines
133 KiB
C
4256 lines
133 KiB
C
// Copyright (c) 2004-2011 Sergey Lyubka
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if defined(_WIN32)
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#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
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#else
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#define _XOPEN_SOURCE 600 // For flockfile() on Linux
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#define _LARGEFILE_SOURCE // Enable 64-bit file offsets
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#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
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#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
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#endif
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#if defined(__SYMBIAN32__)
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#define NO_SSL // SSL is not supported
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#define NO_CGI // CGI is not supported
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#define PATH_MAX FILENAME_MAX
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#endif // __SYMBIAN32__
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#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#endif // !_WIN32_WCE
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#include <time.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <string.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdio.h>
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#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
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#define _WIN32_WINNT 0x0400 // To make it link in VS2005
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#include <windows.h>
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#ifndef PATH_MAX
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#define PATH_MAX MAX_PATH
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#endif
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#ifndef _WIN32_WCE
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#include <process.h>
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#include <direct.h>
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#include <io.h>
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#else // _WIN32_WCE
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#define NO_CGI // WinCE has no pipes
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typedef long off_t;
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#define BUFSIZ 4096
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#define errno GetLastError()
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#define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
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#endif // _WIN32_WCE
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#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
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((uint64_t)((uint32_t)(hi))) << 32))
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#define RATE_DIFF 10000000 // 100 nsecs
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#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
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#define SYS2UNIX_TIME(lo, hi) \
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(time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
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// Visual Studio 6 does not know __func__ or __FUNCTION__
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// The rest of MS compilers use __FUNCTION__, not C99 __func__
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// Also use _strtoui64 on modern M$ compilers
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#if defined(_MSC_VER) && _MSC_VER < 1300
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#define STRX(x) #x
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#define STR(x) STRX(x)
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#define __func__ "line " STR(__LINE__)
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#define strtoull(x, y, z) strtoul(x, y, z)
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#define strtoll(x, y, z) strtol(x, y, z)
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#else
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#define __func__ __FUNCTION__
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#define strtoull(x, y, z) _strtoui64(x, y, z)
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#define strtoll(x, y, z) _strtoi64(x, y, z)
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#endif // _MSC_VER
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#define ERRNO GetLastError()
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#define NO_SOCKLEN_T
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#define SSL_LIB "ssleay32.dll"
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#define CRYPTO_LIB "libeay32.dll"
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#define DIRSEP '\\'
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#define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
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#define O_NONBLOCK 0
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#if !defined(EWOULDBLOCK)
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#define EWOULDBLOCK WSAEWOULDBLOCK
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#endif // !EWOULDBLOCK
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#define _POSIX_
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#define INT64_FMT "I64d"
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#define WINCDECL __cdecl
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#define SHUT_WR 1
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#define snprintf _snprintf
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#define vsnprintf _vsnprintf
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#define mg_sleep(x) Sleep(x)
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#define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
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#define popen(x, y) _popen(x, y)
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#define pclose(x) _pclose(x)
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#define close(x) _close(x)
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#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
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#define RTLD_LAZY 0
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#define fseeko(x, y, z) fseek((x), (y), (z))
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#define fdopen(x, y) _fdopen((x), (y))
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#define write(x, y, z) _write((x), (y), (unsigned) z)
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#define read(x, y, z) _read((x), (y), (unsigned) z)
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#define flockfile(x) EnterCriticalSection(&global_log_file_lock)
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#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock)
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#if !defined(fileno)
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#define fileno(x) _fileno(x)
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#endif // !fileno MINGW #defines fileno
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typedef HANDLE pthread_mutex_t;
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typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
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typedef DWORD pthread_t;
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#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
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struct timespec {
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long tv_nsec;
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long tv_sec;
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};
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static int pthread_mutex_lock(pthread_mutex_t *);
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static int pthread_mutex_unlock(pthread_mutex_t *);
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static FILE *mg_fopen(const char *path, const char *mode);
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#if defined(HAVE_STDINT)
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#include <stdint.h>
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#else
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typedef unsigned int uint32_t;
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typedef unsigned short uint16_t;
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typedef unsigned __int64 uint64_t;
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typedef __int64 int64_t;
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#define INT64_MAX 9223372036854775807
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#endif // HAVE_STDINT
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// POSIX dirent interface
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struct dirent {
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char d_name[PATH_MAX];
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};
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typedef struct DIR {
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HANDLE handle;
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WIN32_FIND_DATAW info;
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struct dirent result;
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} DIR;
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#else // UNIX specific
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <sys/select.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/time.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <unistd.h>
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#include <dirent.h>
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#if !defined(NO_SSL_DL) && !defined(NO_SSL)
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#include <dlfcn.h>
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#endif
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#include <pthread.h>
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#if defined(__MACH__)
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#define SSL_LIB "libssl.dylib"
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#define CRYPTO_LIB "libcrypto.dylib"
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#else
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#if !defined(SSL_LIB)
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#define SSL_LIB "libssl.so"
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#endif
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#if !defined(CRYPTO_LIB)
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#define CRYPTO_LIB "libcrypto.so"
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#endif
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#endif
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#define DIRSEP '/'
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#define IS_DIRSEP_CHAR(c) ((c) == '/')
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif // O_BINARY
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#define closesocket(a) close(a)
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#define mg_fopen(x, y) fopen(x, y)
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#define mg_mkdir(x, y) mkdir(x, y)
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#define mg_remove(x) remove(x)
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#define mg_rename(x, y) rename(x, y)
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#define mg_sleep(x) usleep((x) * 1000)
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#define ERRNO errno
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#define INVALID_SOCKET (-1)
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#define INT64_FMT PRId64
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typedef int SOCKET;
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#define WINCDECL
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#endif // End of Windows and UNIX specific includes
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#include "mongoose.h"
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#define MONGOOSE_VERSION "3.2"
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#define PASSWORDS_FILE_NAME ".htpasswd"
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#define CGI_ENVIRONMENT_SIZE 4096
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#define MAX_CGI_ENVIR_VARS 64
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#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
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#ifdef _WIN32
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static CRITICAL_SECTION global_log_file_lock;
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static pthread_t pthread_self(void) {
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return GetCurrentThreadId();
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}
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#endif // _WIN32
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#if defined(DEBUG)
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#define DEBUG_TRACE(x) do { \
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flockfile(stdout); \
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printf("*** %lu.%p.%s.%d: ", \
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(unsigned long) time(NULL), (void *) pthread_self(), \
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__func__, __LINE__); \
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printf x; \
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putchar('\n'); \
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fflush(stdout); \
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funlockfile(stdout); \
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} while (0)
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#else
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#define DEBUG_TRACE(x)
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#endif // DEBUG
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// Darwin prior to 7.0 and Win32 do not have socklen_t
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#ifdef NO_SOCKLEN_T
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typedef int socklen_t;
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#endif // NO_SOCKLEN_T
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#if !defined(MSG_NOSIGNAL)
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#define MSG_NOSIGNAL 0
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#endif
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typedef void * (*mg_thread_func_t)(void *);
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static const char *http_500_error = "Internal Server Error";
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// Snatched from OpenSSL includes. I put the prototypes here to be independent
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// from the OpenSSL source installation. Having this, mongoose + SSL can be
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// built on any system with binary SSL libraries installed.
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typedef struct ssl_st SSL;
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typedef struct ssl_method_st SSL_METHOD;
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typedef struct ssl_ctx_st SSL_CTX;
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#define SSL_ERROR_WANT_READ 2
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#define SSL_ERROR_WANT_WRITE 3
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#define SSL_FILETYPE_PEM 1
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#define CRYPTO_LOCK 1
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#if defined(NO_SSL_DL)
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extern void SSL_free(SSL *);
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extern int SSL_accept(SSL *);
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extern int SSL_connect(SSL *);
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extern int SSL_read(SSL *, void *, int);
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extern int SSL_write(SSL *, const void *, int);
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extern int SSL_get_error(const SSL *, int);
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extern int SSL_set_fd(SSL *, int);
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extern SSL *SSL_new(SSL_CTX *);
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extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
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extern SSL_METHOD *SSLv23_server_method(void);
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extern int SSL_library_init(void);
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extern void SSL_load_error_strings(void);
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extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
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extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
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extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
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extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
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extern void SSL_CTX_free(SSL_CTX *);
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extern unsigned long ERR_get_error(void);
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extern char *ERR_error_string(unsigned long, char *);
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extern int CRYPTO_num_locks(void);
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extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
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extern void CRYPTO_set_id_callback(unsigned long (*)(void));
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#else
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// Dynamically loaded SSL functionality
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struct ssl_func {
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const char *name; // SSL function name
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void (*ptr)(void); // Function pointer
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};
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#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
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#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
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#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
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#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
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#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
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#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
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#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
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#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
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#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
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#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
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#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
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#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
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const char *, int)) ssl_sw[11].ptr)
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#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
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const char *, int)) ssl_sw[12].ptr)
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#define SSL_CTX_set_default_passwd_cb \
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(* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
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#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
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#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
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#define SSL_CTX_use_certificate_chain_file \
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(* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
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#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
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#define CRYPTO_set_locking_callback \
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(* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
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#define CRYPTO_set_id_callback \
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(* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
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#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
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#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
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// set_ssl_option() function updates this array.
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// It loads SSL library dynamically and changes NULLs to the actual addresses
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// of respective functions. The macros above (like SSL_connect()) are really
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// just calling these functions indirectly via the pointer.
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static struct ssl_func ssl_sw[] = {
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{"SSL_free", NULL},
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{"SSL_accept", NULL},
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{"SSL_connect", NULL},
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{"SSL_read", NULL},
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{"SSL_write", NULL},
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{"SSL_get_error", NULL},
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{"SSL_set_fd", NULL},
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{"SSL_new", NULL},
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{"SSL_CTX_new", NULL},
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{"SSLv23_server_method", NULL},
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{"SSL_library_init", NULL},
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{"SSL_CTX_use_PrivateKey_file", NULL},
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{"SSL_CTX_use_certificate_file",NULL},
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{"SSL_CTX_set_default_passwd_cb",NULL},
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{"SSL_CTX_free", NULL},
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{"SSL_load_error_strings", NULL},
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{"SSL_CTX_use_certificate_chain_file", NULL},
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{NULL, NULL}
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};
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// Similar array as ssl_sw. These functions could be located in different lib.
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static struct ssl_func crypto_sw[] = {
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{"CRYPTO_num_locks", NULL},
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{"CRYPTO_set_locking_callback", NULL},
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{"CRYPTO_set_id_callback", NULL},
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{"ERR_get_error", NULL},
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{"ERR_error_string", NULL},
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{NULL, NULL}
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};
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#endif // NO_SSL_DL
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static const char *month_names[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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// Unified socket address. For IPv6 support, add IPv6 address structure
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// in the union u.
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union usa {
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struct sockaddr sa;
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struct sockaddr_in sin;
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#if defined(USE_IPV6)
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struct sockaddr_in6 sin6;
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#endif
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};
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// Describes a string (chunk of memory).
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struct vec {
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const char *ptr;
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size_t len;
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};
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// Structure used by mg_stat() function. Uses 64 bit file length.
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struct mgstat {
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int is_directory; // Directory marker
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int64_t size; // File size
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time_t mtime; // Modification time
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};
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// Describes listening socket, or socket which was accept()-ed by the master
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// thread and queued for future handling by the worker thread.
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struct socket {
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struct socket *next; // Linkage
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SOCKET sock; // Listening socket
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union usa lsa; // Local socket address
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union usa rsa; // Remote socket address
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int is_ssl; // Is socket SSL-ed
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};
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enum {
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CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
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PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
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SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
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GLOBAL_PASSWORDS_FILE, INDEX_FILES,
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ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
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EXTRA_MIME_TYPES, LISTENING_PORTS,
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DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE,
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NUM_OPTIONS
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};
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static const char *config_options[] = {
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"C", "cgi_pattern", "**.cgi$|**.pl$|**.php$",
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"E", "cgi_environment", NULL,
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"G", "put_delete_passwords_file", NULL,
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"I", "cgi_interpreter", NULL,
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"P", "protect_uri", NULL,
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"R", "authentication_domain", "mydomain.com",
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"S", "ssi_pattern", "**.shtml$|**.shtm$",
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"a", "access_log_file", NULL,
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"c", "ssl_chain_file", NULL,
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"d", "enable_directory_listing", "yes",
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"e", "error_log_file", NULL,
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"g", "global_passwords_file", NULL,
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"i", "index_files", "index.html,index.htm,index.cgi",
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"k", "enable_keep_alive", "no",
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"l", "access_control_list", NULL,
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"M", "max_request_size", "16384",
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"m", "extra_mime_types", NULL,
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"p", "listening_ports", "8080",
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"r", "document_root", ".",
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"s", "ssl_certificate", NULL,
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"t", "num_threads", "10",
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"u", "run_as_user", NULL,
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"w", "url_rewrite_patterns", NULL,
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NULL
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};
|
|
#define ENTRIES_PER_CONFIG_OPTION 3
|
|
|
|
struct mg_context {
|
|
volatile int stop_flag; // Should we stop event loop
|
|
SSL_CTX *ssl_ctx; // SSL context
|
|
char *config[NUM_OPTIONS]; // Mongoose configuration parameters
|
|
mg_callback_t user_callback; // User-defined callback function
|
|
void *user_data; // User-defined data
|
|
|
|
struct socket *listening_sockets;
|
|
|
|
volatile int num_threads; // Number of threads
|
|
pthread_mutex_t mutex; // Protects (max|num)_threads
|
|
pthread_cond_t cond; // Condvar for tracking workers terminations
|
|
|
|
struct socket queue[20]; // Accepted sockets
|
|
volatile int sq_head; // Head of the socket queue
|
|
volatile int sq_tail; // Tail of the socket queue
|
|
pthread_cond_t sq_full; // Singaled when socket is produced
|
|
pthread_cond_t sq_empty; // Signaled when socket is consumed
|
|
};
|
|
|
|
struct mg_connection {
|
|
struct mg_request_info request_info;
|
|
struct mg_context *ctx;
|
|
SSL *ssl; // SSL descriptor
|
|
struct socket client; // Connected client
|
|
time_t birth_time; // Time connection was accepted
|
|
int64_t num_bytes_sent; // Total bytes sent to client
|
|
int64_t content_len; // Content-Length header value
|
|
int64_t consumed_content; // How many bytes of content is already read
|
|
char *buf; // Buffer for received data
|
|
char *path_info; // PATH_INFO part of the URL
|
|
int must_close; // 1 if connection must be closed
|
|
int buf_size; // Buffer size
|
|
int request_len; // Size of the request + headers in a buffer
|
|
int data_len; // Total size of data in a buffer
|
|
};
|
|
|
|
const char **mg_get_valid_option_names(void) {
|
|
return config_options;
|
|
}
|
|
|
|
static void *call_user(struct mg_connection *conn, enum mg_event event) {
|
|
conn->request_info.user_data = conn->ctx->user_data;
|
|
return conn->ctx->user_callback == NULL ? NULL :
|
|
conn->ctx->user_callback(event, conn, &conn->request_info);
|
|
}
|
|
|
|
static int get_option_index(const char *name) {
|
|
int i;
|
|
|
|
for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
|
|
if (strcmp(config_options[i], name) == 0 ||
|
|
strcmp(config_options[i + 1], name) == 0) {
|
|
return i / ENTRIES_PER_CONFIG_OPTION;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
const char *mg_get_option(const struct mg_context *ctx, const char *name) {
|
|
int i;
|
|
if ((i = get_option_index(name)) == -1) {
|
|
return NULL;
|
|
} else if (ctx->config[i] == NULL) {
|
|
return "";
|
|
} else {
|
|
return ctx->config[i];
|
|
}
|
|
}
|
|
|
|
static void sockaddr_to_string(char *buf, size_t len,
|
|
const union usa *usa) {
|
|
buf[0] = '\0';
|
|
#if defined(USE_IPV6)
|
|
inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
|
|
(void *) &usa->sin.sin_addr :
|
|
(void *) &usa->sin6.sin6_addr, buf, len);
|
|
#elif defined(_WIN32)
|
|
// Only Windoze Vista (and newer) have inet_ntop()
|
|
strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
|
|
#else
|
|
inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
|
|
#endif
|
|
}
|
|
|
|
// Print error message to the opened error log stream.
|
|
static void cry(struct mg_connection *conn, const char *fmt, ...) {
|
|
char buf[BUFSIZ], src_addr[20];
|
|
va_list ap;
|
|
FILE *fp;
|
|
time_t timestamp;
|
|
|
|
va_start(ap, fmt);
|
|
(void) vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
|
|
// Do not lock when getting the callback value, here and below.
|
|
// I suppose this is fine, since function cannot disappear in the
|
|
// same way string option can.
|
|
conn->request_info.log_message = buf;
|
|
if (call_user(conn, MG_EVENT_LOG) == NULL) {
|
|
fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
|
|
mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
|
|
|
|
if (fp != NULL) {
|
|
flockfile(fp);
|
|
timestamp = time(NULL);
|
|
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
|
|
fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
|
|
src_addr);
|
|
|
|
if (conn->request_info.request_method != NULL) {
|
|
fprintf(fp, "%s %s: ", conn->request_info.request_method,
|
|
conn->request_info.uri);
|
|
}
|
|
|
|
(void) fprintf(fp, "%s", buf);
|
|
fputc('\n', fp);
|
|
funlockfile(fp);
|
|
if (fp != stderr) {
|
|
fclose(fp);
|
|
}
|
|
}
|
|
}
|
|
conn->request_info.log_message = NULL;
|
|
}
|
|
|
|
// Return OpenSSL error message
|
|
static const char *ssl_error(void) {
|
|
unsigned long err;
|
|
err = ERR_get_error();
|
|
return err == 0 ? "" : ERR_error_string(err, NULL);
|
|
}
|
|
|
|
// Return fake connection structure. Used for logging, if connection
|
|
// is not applicable at the moment of logging.
|
|
static struct mg_connection *fc(struct mg_context *ctx) {
|
|
static struct mg_connection fake_connection;
|
|
fake_connection.ctx = ctx;
|
|
return &fake_connection;
|
|
}
|
|
|
|
const char *mg_version(void) {
|
|
return MONGOOSE_VERSION;
|
|
}
|
|
|
|
static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
|
|
for (; *src != '\0' && n > 1; n--) {
|
|
*dst++ = *src++;
|
|
}
|
|
*dst = '\0';
|
|
}
|
|
|
|
static int lowercase(const char *s) {
|
|
return tolower(* (const unsigned char *) s);
|
|
}
|
|
|
|
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
|
|
int diff = 0;
|
|
|
|
if (len > 0)
|
|
do {
|
|
diff = lowercase(s1++) - lowercase(s2++);
|
|
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
|
|
|
|
return diff;
|
|
}
|
|
|
|
static int mg_strcasecmp(const char *s1, const char *s2) {
|
|
int diff;
|
|
|
|
do {
|
|
diff = lowercase(s1++) - lowercase(s2++);
|
|
} while (diff == 0 && s1[-1] != '\0');
|
|
|
|
return diff;
|
|
}
|
|
|
|
static char * mg_strndup(const char *ptr, size_t len) {
|
|
char *p;
|
|
|
|
if ((p = (char *) malloc(len + 1)) != NULL) {
|
|
mg_strlcpy(p, ptr, len + 1);
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
static char * mg_strdup(const char *str) {
|
|
return mg_strndup(str, strlen(str));
|
|
}
|
|
|
|
// Like snprintf(), but never returns negative value, or the value
|
|
// that is larger than a supplied buffer.
|
|
// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
|
|
// in his audit report.
|
|
static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
|
|
const char *fmt, va_list ap) {
|
|
int n;
|
|
|
|
if (buflen == 0)
|
|
return 0;
|
|
|
|
n = vsnprintf(buf, buflen, fmt, ap);
|
|
|
|
if (n < 0) {
|
|
cry(conn, "vsnprintf error");
|
|
n = 0;
|
|
} else if (n >= (int) buflen) {
|
|
cry(conn, "truncating vsnprintf buffer: [%.*s]",
|
|
n > 200 ? 200 : n, buf);
|
|
n = (int) buflen - 1;
|
|
}
|
|
buf[n] = '\0';
|
|
|
|
return n;
|
|
}
|
|
|
|
static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
|
|
const char *fmt, ...) {
|
|
va_list ap;
|
|
int n;
|
|
|
|
va_start(ap, fmt);
|
|
n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return n;
|
|
}
|
|
|
|
// Skip the characters until one of the delimiters characters found.
|
|
// 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
|
|
// Advance pointer to buffer to the next word. Return found 0-terminated word.
|
|
// Delimiters can be quoted with quotechar.
|
|
static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
|
|
char *p, *begin_word, *end_word, *end_whitespace;
|
|
|
|
begin_word = *buf;
|
|
end_word = begin_word + strcspn(begin_word, delimiters);
|
|
|
|
// Check for quotechar
|
|
if (end_word > begin_word) {
|
|
p = end_word - 1;
|
|
while (*p == quotechar) {
|
|
// If there is anything beyond end_word, copy it
|
|
if (*end_word == '\0') {
|
|
*p = '\0';
|
|
break;
|
|
} else {
|
|
size_t end_off = strcspn(end_word + 1, delimiters);
|
|
memmove (p, end_word, end_off + 1);
|
|
p += end_off; // p must correspond to end_word - 1
|
|
end_word += end_off + 1;
|
|
}
|
|
}
|
|
for (p++; p < end_word; p++) {
|
|
*p = '\0';
|
|
}
|
|
}
|
|
|
|
if (*end_word == '\0') {
|
|
*buf = end_word;
|
|
} else {
|
|
end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
|
|
|
|
for (p = end_word; p < end_whitespace; p++) {
|
|
*p = '\0';
|
|
}
|
|
|
|
*buf = end_whitespace;
|
|
}
|
|
|
|
return begin_word;
|
|
}
|
|
|
|
// Simplified version of skip_quoted without quote char
|
|
// and whitespace == delimiters
|
|
static char *skip(char **buf, const char *delimiters) {
|
|
return skip_quoted(buf, delimiters, delimiters, 0);
|
|
}
|
|
|
|
|
|
// Return HTTP header value, or NULL if not found.
|
|
static const char *get_header(const struct mg_request_info *ri,
|
|
const char *name) {
|
|
int i;
|
|
|
|
for (i = 0; i < ri->num_headers; i++)
|
|
if (!mg_strcasecmp(name, ri->http_headers[i].name))
|
|
return ri->http_headers[i].value;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
const char *mg_get_header(const struct mg_connection *conn, const char *name) {
|
|
return get_header(&conn->request_info, name);
|
|
}
|
|
|
|
// A helper function for traversing comma separated list of values.
|
|
// It returns a list pointer shifted to the next value, of NULL if the end
|
|
// of the list found.
|
|
// Value is stored in val vector. If value has form "x=y", then eq_val
|
|
// vector is initialized to point to the "y" part, and val vector length
|
|
// is adjusted to point only to "x".
|
|
static const char *next_option(const char *list, struct vec *val,
|
|
struct vec *eq_val) {
|
|
if (list == NULL || *list == '\0') {
|
|
// End of the list
|
|
list = NULL;
|
|
} else {
|
|
val->ptr = list;
|
|
if ((list = strchr(val->ptr, ',')) != NULL) {
|
|
// Comma found. Store length and shift the list ptr
|
|
val->len = list - val->ptr;
|
|
list++;
|
|
} else {
|
|
// This value is the last one
|
|
list = val->ptr + strlen(val->ptr);
|
|
val->len = list - val->ptr;
|
|
}
|
|
|
|
if (eq_val != NULL) {
|
|
// Value has form "x=y", adjust pointers and lengths
|
|
// so that val points to "x", and eq_val points to "y".
|
|
eq_val->len = 0;
|
|
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
|
|
if (eq_val->ptr != NULL) {
|
|
eq_val->ptr++; // Skip over '=' character
|
|
eq_val->len = val->ptr + val->len - eq_val->ptr;
|
|
val->len = (eq_val->ptr - val->ptr) - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
static int match_prefix(const char *pattern, int pattern_len, const char *str) {
|
|
const char *or_str;
|
|
int i, j, len, res;
|
|
|
|
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
|
|
res = match_prefix(pattern, or_str - pattern, str);
|
|
return res > 0 ? res :
|
|
match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
|
|
}
|
|
|
|
i = j = 0;
|
|
res = -1;
|
|
for (; i < pattern_len; i++, j++) {
|
|
if (pattern[i] == '?' && str[j] != '\0') {
|
|
continue;
|
|
} else if (pattern[i] == '$') {
|
|
return str[j] == '\0' ? j : -1;
|
|
} else if (pattern[i] == '*') {
|
|
i++;
|
|
if (pattern[i] == '*') {
|
|
i++;
|
|
len = strlen(str + j);
|
|
} else {
|
|
len = strcspn(str + j, "/");
|
|
}
|
|
if (i == pattern_len) {
|
|
return j + len;
|
|
}
|
|
do {
|
|
res = match_prefix(pattern + i, pattern_len - i, str + j + len);
|
|
} while (res == -1 && len-- > 0);
|
|
return res == -1 ? -1 : j + res + len;
|
|
} else if (pattern[i] != str[j]) {
|
|
return -1;
|
|
}
|
|
}
|
|
return j;
|
|
}
|
|
|
|
// HTTP 1.1 assumes keep alive if "Connection:" header is not set
|
|
// This function must tolerate situations when connection info is not
|
|
// set up, for example if request parsing failed.
|
|
static int should_keep_alive(const struct mg_connection *conn) {
|
|
const char *http_version = conn->request_info.http_version;
|
|
const char *header = mg_get_header(conn, "Connection");
|
|
return (!conn->must_close &&
|
|
!conn->request_info.status_code != 401 &&
|
|
!mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") &&
|
|
(header == NULL && http_version && !strcmp(http_version, "1.1"))) ||
|
|
(header != NULL && !mg_strcasecmp(header, "keep-alive"));
|
|
}
|
|
|
|
static const char *suggest_connection_header(const struct mg_connection *conn) {
|
|
return should_keep_alive(conn) ? "keep-alive" : "close";
|
|
}
|
|
|
|
static void send_http_error(struct mg_connection *conn, int status,
|
|
const char *reason, const char *fmt, ...) {
|
|
char buf[BUFSIZ];
|
|
va_list ap;
|
|
int len;
|
|
|
|
conn->request_info.status_code = status;
|
|
|
|
if (call_user(conn, MG_HTTP_ERROR) == NULL) {
|
|
buf[0] = '\0';
|
|
len = 0;
|
|
|
|
// Errors 1xx, 204 and 304 MUST NOT send a body
|
|
if (status > 199 && status != 204 && status != 304) {
|
|
len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
|
|
cry(conn, "%s", buf);
|
|
buf[len++] = '\n';
|
|
|
|
va_start(ap, fmt);
|
|
len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
DEBUG_TRACE(("[%s]", buf));
|
|
|
|
mg_printf(conn, "HTTP/1.1 %d %s\r\n"
|
|
"Content-Type: text/plain\r\n"
|
|
"Content-Length: %d\r\n"
|
|
"Connection: %s\r\n\r\n", status, reason, len,
|
|
suggest_connection_header(conn));
|
|
conn->num_bytes_sent += mg_printf(conn, "%s", buf);
|
|
}
|
|
}
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
|
|
unused = NULL;
|
|
*mutex = CreateMutex(NULL, FALSE, NULL);
|
|
return *mutex == NULL ? -1 : 0;
|
|
}
|
|
|
|
static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
|
|
return CloseHandle(*mutex) == 0 ? -1 : 0;
|
|
}
|
|
|
|
static int pthread_mutex_lock(pthread_mutex_t *mutex) {
|
|
return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
|
|
}
|
|
|
|
static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
|
|
return ReleaseMutex(*mutex) == 0 ? -1 : 0;
|
|
}
|
|
|
|
static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
|
|
unused = NULL;
|
|
cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
|
|
return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
|
|
}
|
|
|
|
static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
|
|
HANDLE handles[] = {cv->signal, cv->broadcast};
|
|
ReleaseMutex(*mutex);
|
|
WaitForMultipleObjects(2, handles, FALSE, INFINITE);
|
|
return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
|
|
}
|
|
|
|
static int pthread_cond_signal(pthread_cond_t *cv) {
|
|
return SetEvent(cv->signal) == 0 ? -1 : 0;
|
|
}
|
|
|
|
static int pthread_cond_broadcast(pthread_cond_t *cv) {
|
|
// Implementation with PulseEvent() has race condition, see
|
|
// http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
|
|
return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
|
|
}
|
|
|
|
static int pthread_cond_destroy(pthread_cond_t *cv) {
|
|
return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
|
|
}
|
|
|
|
// For Windows, change all slashes to backslashes in path names.
|
|
static void change_slashes_to_backslashes(char *path) {
|
|
int i;
|
|
|
|
for (i = 0; path[i] != '\0'; i++) {
|
|
if (path[i] == '/')
|
|
path[i] = '\\';
|
|
// i > 0 check is to preserve UNC paths, like \\server\file.txt
|
|
if (path[i] == '\\' && i > 0)
|
|
while (path[i + 1] == '\\' || path[i + 1] == '/')
|
|
(void) memmove(path + i + 1,
|
|
path + i + 2, strlen(path + i + 1));
|
|
}
|
|
}
|
|
|
|
// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
|
|
// wbuf and wbuf_len is a target buffer and its length.
|
|
static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
|
|
char buf[PATH_MAX], buf2[PATH_MAX], *p;
|
|
|
|
mg_strlcpy(buf, path, sizeof(buf));
|
|
change_slashes_to_backslashes(buf);
|
|
|
|
// Point p to the end of the file name
|
|
p = buf + strlen(buf) - 1;
|
|
|
|
// Trim trailing backslash character
|
|
while (p > buf && *p == '\\' && p[-1] != ':') {
|
|
*p-- = '\0';
|
|
}
|
|
|
|
// Protect from CGI code disclosure.
|
|
// This is very nasty hole. Windows happily opens files with
|
|
// some garbage in the end of file name. So fopen("a.cgi ", "r")
|
|
// actually opens "a.cgi", and does not return an error!
|
|
if (*p == 0x20 || // No space at the end
|
|
(*p == 0x2e && p > buf) || // No '.' but allow '.' as full path
|
|
*p == 0x2b || // No '+'
|
|
(*p & ~0x7f)) { // And generally no non-ascii chars
|
|
(void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
|
|
wbuf[0] = L'\0';
|
|
} else {
|
|
// Convert to Unicode and back. If doubly-converted string does not
|
|
// match the original, something is fishy, reject.
|
|
memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
|
|
MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
|
|
WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
|
|
NULL, NULL);
|
|
if (strcmp(buf, buf2) != 0) {
|
|
wbuf[0] = L'\0';
|
|
}
|
|
}
|
|
}
|
|
|
|
#if defined(_WIN32_WCE)
|
|
static time_t time(time_t *ptime) {
|
|
time_t t;
|
|
SYSTEMTIME st;
|
|
FILETIME ft;
|
|
|
|
GetSystemTime(&st);
|
|
SystemTimeToFileTime(&st, &ft);
|
|
t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
|
|
|
|
if (ptime != NULL) {
|
|
*ptime = t;
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
|
|
int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
|
|
FILETIME ft, lft;
|
|
SYSTEMTIME st;
|
|
TIME_ZONE_INFORMATION tzinfo;
|
|
|
|
if (ptm == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
* (int64_t *) &ft = t;
|
|
FileTimeToLocalFileTime(&ft, &lft);
|
|
FileTimeToSystemTime(&lft, &st);
|
|
ptm->tm_year = st.wYear - 1900;
|
|
ptm->tm_mon = st.wMonth - 1;
|
|
ptm->tm_wday = st.wDayOfWeek;
|
|
ptm->tm_mday = st.wDay;
|
|
ptm->tm_hour = st.wHour;
|
|
ptm->tm_min = st.wMinute;
|
|
ptm->tm_sec = st.wSecond;
|
|
ptm->tm_yday = 0; // hope nobody uses this
|
|
ptm->tm_isdst =
|
|
GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
|
|
|
|
return ptm;
|
|
}
|
|
|
|
static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
|
|
// FIXME(lsm): fix this.
|
|
return localtime(ptime, ptm);
|
|
}
|
|
|
|
static size_t strftime(char *dst, size_t dst_size, const char *fmt,
|
|
const struct tm *tm) {
|
|
(void) snprintf(dst, dst_size, "implement strftime() for WinCE");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int mg_rename(const char* oldname, const char* newname) {
|
|
wchar_t woldbuf[PATH_MAX];
|
|
wchar_t wnewbuf[PATH_MAX];
|
|
|
|
to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
|
|
to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
|
|
|
|
return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
|
|
}
|
|
|
|
|
|
static FILE *mg_fopen(const char *path, const char *mode) {
|
|
wchar_t wbuf[PATH_MAX], wmode[20];
|
|
|
|
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
|
|
MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
|
|
|
|
return _wfopen(wbuf, wmode);
|
|
}
|
|
|
|
static int mg_stat(const char *path, struct mgstat *stp) {
|
|
int ok = -1; // Error
|
|
wchar_t wbuf[PATH_MAX];
|
|
WIN32_FILE_ATTRIBUTE_DATA info;
|
|
|
|
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
|
|
|
|
if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
|
|
stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
|
|
stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
|
|
info.ftLastWriteTime.dwHighDateTime);
|
|
stp->is_directory =
|
|
info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
|
|
ok = 0; // Success
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
static int mg_remove(const char *path) {
|
|
wchar_t wbuf[PATH_MAX];
|
|
to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
|
|
return DeleteFileW(wbuf) ? 0 : -1;
|
|
}
|
|
|
|
static int mg_mkdir(const char *path, int mode) {
|
|
char buf[PATH_MAX];
|
|
wchar_t wbuf[PATH_MAX];
|
|
|
|
mode = 0; // Unused
|
|
mg_strlcpy(buf, path, sizeof(buf));
|
|
change_slashes_to_backslashes(buf);
|
|
|
|
(void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
|
|
|
|
return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
|
|
}
|
|
|
|
// Implementation of POSIX opendir/closedir/readdir for Windows.
|
|
static DIR * opendir(const char *name) {
|
|
DIR *dir = NULL;
|
|
wchar_t wpath[PATH_MAX];
|
|
DWORD attrs;
|
|
|
|
if (name == NULL) {
|
|
SetLastError(ERROR_BAD_ARGUMENTS);
|
|
} else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
|
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
|
} else {
|
|
to_unicode(name, wpath, ARRAY_SIZE(wpath));
|
|
attrs = GetFileAttributesW(wpath);
|
|
if (attrs != 0xFFFFFFFF &&
|
|
((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
|
|
(void) wcscat(wpath, L"\\*");
|
|
dir->handle = FindFirstFileW(wpath, &dir->info);
|
|
dir->result.d_name[0] = '\0';
|
|
} else {
|
|
free(dir);
|
|
dir = NULL;
|
|
}
|
|
}
|
|
|
|
return dir;
|
|
}
|
|
|
|
static int closedir(DIR *dir) {
|
|
int result = 0;
|
|
|
|
if (dir != NULL) {
|
|
if (dir->handle != INVALID_HANDLE_VALUE)
|
|
result = FindClose(dir->handle) ? 0 : -1;
|
|
|
|
free(dir);
|
|
} else {
|
|
result = -1;
|
|
SetLastError(ERROR_BAD_ARGUMENTS);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
struct dirent * readdir(DIR *dir) {
|
|
struct dirent *result = 0;
|
|
|
|
if (dir) {
|
|
if (dir->handle != INVALID_HANDLE_VALUE) {
|
|
result = &dir->result;
|
|
(void) WideCharToMultiByte(CP_UTF8, 0,
|
|
dir->info.cFileName, -1, result->d_name,
|
|
sizeof(result->d_name), NULL, NULL);
|
|
|
|
if (!FindNextFileW(dir->handle, &dir->info)) {
|
|
(void) FindClose(dir->handle);
|
|
dir->handle = INVALID_HANDLE_VALUE;
|
|
}
|
|
|
|
} else {
|
|
SetLastError(ERROR_FILE_NOT_FOUND);
|
|
}
|
|
} else {
|
|
SetLastError(ERROR_BAD_ARGUMENTS);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
|
|
|
|
static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) {
|
|
return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
|
|
}
|
|
|
|
static HANDLE dlopen(const char *dll_name, int flags) {
|
|
wchar_t wbuf[PATH_MAX];
|
|
flags = 0; // Unused
|
|
to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
|
|
return LoadLibraryW(wbuf);
|
|
}
|
|
|
|
#if !defined(NO_CGI)
|
|
#define SIGKILL 0
|
|
static int kill(pid_t pid, int sig_num) {
|
|
(void) TerminateProcess(pid, sig_num);
|
|
(void) CloseHandle(pid);
|
|
return 0;
|
|
}
|
|
|
|
static pid_t spawn_process(struct mg_connection *conn, const char *prog,
|
|
char *envblk, char *envp[], int fd_stdin,
|
|
int fd_stdout, const char *dir) {
|
|
HANDLE me;
|
|
char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
|
|
FILE *fp;
|
|
STARTUPINFOA si = { sizeof(si) };
|
|
PROCESS_INFORMATION pi = { 0 };
|
|
|
|
envp = NULL; // Unused
|
|
|
|
// TODO(lsm): redirect CGI errors to the error log file
|
|
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
|
|
si.wShowWindow = SW_HIDE;
|
|
|
|
me = GetCurrentProcess();
|
|
(void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
|
|
&si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
|
|
(void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
|
|
&si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
|
|
|
|
// If CGI file is a script, try to read the interpreter line
|
|
interp = conn->ctx->config[CGI_INTERPRETER];
|
|
if (interp == NULL) {
|
|
buf[2] = '\0';
|
|
mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog);
|
|
if ((fp = fopen(cmdline, "r")) != NULL) {
|
|
(void) fgets(buf, sizeof(buf), fp);
|
|
if (buf[0] != '#' || buf[1] != '!') {
|
|
// First line does not start with "#!". Do not set interpreter.
|
|
buf[2] = '\0';
|
|
} else {
|
|
// Trim whitespaces in interpreter name
|
|
for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
|
|
*p = '\0';
|
|
}
|
|
}
|
|
(void) fclose(fp);
|
|
}
|
|
interp = buf + 2;
|
|
}
|
|
|
|
(void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
|
|
interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
|
|
|
|
DEBUG_TRACE(("Running [%s]", cmdline));
|
|
if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
|
|
CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
|
|
cry(conn, "%s: CreateProcess(%s): %d",
|
|
__func__, cmdline, ERRNO);
|
|
pi.hProcess = (pid_t) -1;
|
|
} else {
|
|
(void) close(fd_stdin);
|
|
(void) close(fd_stdout);
|
|
}
|
|
|
|
(void) CloseHandle(si.hStdOutput);
|
|
(void) CloseHandle(si.hStdInput);
|
|
(void) CloseHandle(pi.hThread);
|
|
|
|
return (pid_t) pi.hProcess;
|
|
}
|
|
#endif // !NO_CGI
|
|
|
|
static int set_non_blocking_mode(SOCKET sock) {
|
|
unsigned long on = 1;
|
|
return ioctlsocket(sock, FIONBIO, &on);
|
|
}
|
|
|
|
#else
|
|
static int mg_stat(const char *path, struct mgstat *stp) {
|
|
struct stat st;
|
|
int ok;
|
|
|
|
if (stat(path, &st) == 0) {
|
|
ok = 0;
|
|
stp->size = st.st_size;
|
|
stp->mtime = st.st_mtime;
|
|
stp->is_directory = S_ISDIR(st.st_mode);
|
|
} else {
|
|
ok = -1;
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
static void set_close_on_exec(int fd) {
|
|
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
|
|
}
|
|
|
|
static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
|
|
void *param) {
|
|
pthread_t thread_id;
|
|
pthread_attr_t attr;
|
|
int retval;
|
|
|
|
(void) pthread_attr_init(&attr);
|
|
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
|
|
// TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
|
|
// (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
|
|
|
|
if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
|
|
cry(fc(ctx), "%s: %s", __func__, strerror(retval));
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
#ifndef NO_CGI
|
|
static pid_t spawn_process(struct mg_connection *conn, const char *prog,
|
|
char *envblk, char *envp[], int fd_stdin,
|
|
int fd_stdout, const char *dir) {
|
|
pid_t pid;
|
|
const char *interp;
|
|
|
|
envblk = NULL; // Unused
|
|
|
|
if ((pid = fork()) == -1) {
|
|
// Parent
|
|
send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
|
|
} else if (pid == 0) {
|
|
// Child
|
|
if (chdir(dir) != 0) {
|
|
cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
|
|
} else if (dup2(fd_stdin, 0) == -1) {
|
|
cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
|
|
} else if (dup2(fd_stdout, 1) == -1) {
|
|
cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
|
|
} else {
|
|
(void) dup2(fd_stdout, 2);
|
|
(void) close(fd_stdin);
|
|
(void) close(fd_stdout);
|
|
|
|
// Execute CGI program. No need to lock: new process
|
|
interp = conn->ctx->config[CGI_INTERPRETER];
|
|
if (interp == NULL) {
|
|
(void) execle(prog, prog, NULL, envp);
|
|
cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
|
|
} else {
|
|
(void) execle(interp, interp, prog, NULL, envp);
|
|
cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
|
|
strerror(ERRNO));
|
|
}
|
|
}
|
|
exit(EXIT_FAILURE);
|
|
} else {
|
|
// Parent. Close stdio descriptors
|
|
(void) close(fd_stdin);
|
|
(void) close(fd_stdout);
|
|
}
|
|
|
|
return pid;
|
|
}
|
|
#endif // !NO_CGI
|
|
|
|
static int set_non_blocking_mode(SOCKET sock) {
|
|
int flags;
|
|
|
|
flags = fcntl(sock, F_GETFL, 0);
|
|
(void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
|
|
|
|
return 0;
|
|
}
|
|
#endif // _WIN32
|
|
|
|
// Write data to the IO channel - opened file descriptor, socket or SSL
|
|
// descriptor. Return number of bytes written.
|
|
static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
|
|
int64_t len) {
|
|
int64_t sent;
|
|
int n, k;
|
|
|
|
sent = 0;
|
|
while (sent < len) {
|
|
|
|
// How many bytes we send in this iteration
|
|
k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
|
|
|
|
if (ssl != NULL) {
|
|
n = SSL_write(ssl, buf + sent, k);
|
|
} else if (fp != NULL) {
|
|
n = fwrite(buf + sent, 1, (size_t) k, fp);
|
|
if (ferror(fp))
|
|
n = -1;
|
|
} else {
|
|
n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
|
|
}
|
|
|
|
if (n < 0)
|
|
break;
|
|
|
|
sent += n;
|
|
}
|
|
|
|
return sent;
|
|
}
|
|
|
|
// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
|
|
// Return number of bytes read.
|
|
static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
|
|
int nread;
|
|
|
|
if (ssl != NULL) {
|
|
nread = SSL_read(ssl, buf, len);
|
|
} else if (fp != NULL) {
|
|
// Use read() instead of fread(), because if we're reading from the CGI
|
|
// pipe, fread() may block until IO buffer is filled up. We cannot afford
|
|
// to block and must pass all read bytes immediately to the client.
|
|
nread = read(fileno(fp), buf, (size_t) len);
|
|
if (ferror(fp))
|
|
nread = -1;
|
|
} else {
|
|
nread = recv(sock, buf, (size_t) len, 0);
|
|
}
|
|
|
|
return nread;
|
|
}
|
|
|
|
int mg_read(struct mg_connection *conn, void *buf, size_t len) {
|
|
int n, buffered_len, nread;
|
|
const char *buffered;
|
|
|
|
assert((conn->content_len == -1 && conn->consumed_content == 0) ||
|
|
conn->consumed_content <= conn->content_len);
|
|
DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
|
|
conn->content_len, conn->consumed_content));
|
|
nread = 0;
|
|
if (conn->consumed_content < conn->content_len) {
|
|
|
|
// Adjust number of bytes to read.
|
|
int64_t to_read = conn->content_len - conn->consumed_content;
|
|
if (to_read < (int64_t) len) {
|
|
len = (int) to_read;
|
|
}
|
|
|
|
// How many bytes of data we have buffered in the request buffer?
|
|
buffered = conn->buf + conn->request_len + conn->consumed_content;
|
|
buffered_len = conn->data_len - conn->request_len;
|
|
assert(buffered_len >= 0);
|
|
|
|
// Return buffered data back if we haven't done that yet.
|
|
if (conn->consumed_content < (int64_t) buffered_len) {
|
|
buffered_len -= (int) conn->consumed_content;
|
|
if (len < (size_t) buffered_len) {
|
|
buffered_len = len;
|
|
}
|
|
memcpy(buf, buffered, (size_t)buffered_len);
|
|
len -= buffered_len;
|
|
buf = (char *) buf + buffered_len;
|
|
conn->consumed_content += buffered_len;
|
|
nread = buffered_len;
|
|
}
|
|
|
|
// We have returned all buffered data. Read new data from the remote socket.
|
|
while (len > 0) {
|
|
n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
|
|
if (n <= 0) {
|
|
break;
|
|
}
|
|
buf = (char *) buf + n;
|
|
conn->consumed_content += n;
|
|
nread += n;
|
|
len -= n;
|
|
}
|
|
}
|
|
return nread;
|
|
}
|
|
|
|
int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
|
|
return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
|
|
(int64_t) len);
|
|
}
|
|
|
|
int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
|
|
char buf[BUFSIZ];
|
|
int len;
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
|
|
return mg_write(conn, buf, (size_t)len);
|
|
}
|
|
|
|
// URL-decode input buffer into destination buffer.
|
|
// 0-terminate the destination buffer. Return the length of decoded data.
|
|
// form-url-encoded data differs from URI encoding in a way that it
|
|
// uses '+' as character for space, see RFC 1866 section 8.2.1
|
|
// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
|
|
static size_t url_decode(const char *src, size_t src_len, char *dst,
|
|
size_t dst_len, int is_form_url_encoded) {
|
|
size_t i, j;
|
|
int a, b;
|
|
#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
|
|
|
|
for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
|
|
if (src[i] == '%' &&
|
|
isxdigit(* (const unsigned char *) (src + i + 1)) &&
|
|
isxdigit(* (const unsigned char *) (src + i + 2))) {
|
|
a = tolower(* (const unsigned char *) (src + i + 1));
|
|
b = tolower(* (const unsigned char *) (src + i + 2));
|
|
dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
|
|
i += 2;
|
|
} else if (is_form_url_encoded && src[i] == '+') {
|
|
dst[j] = ' ';
|
|
} else {
|
|
dst[j] = src[i];
|
|
}
|
|
}
|
|
|
|
dst[j] = '\0'; // Null-terminate the destination
|
|
|
|
return j;
|
|
}
|
|
|
|
// Scan given buffer and fetch the value of the given variable.
|
|
// It can be specified in query string, or in the POST data.
|
|
// Return NULL if the variable not found, or allocated 0-terminated value.
|
|
// It is caller's responsibility to free the returned value.
|
|
int mg_get_var(const char *buf, size_t buf_len, const char *name,
|
|
char *dst, size_t dst_len) {
|
|
const char *p, *e, *s;
|
|
size_t name_len, len;
|
|
|
|
name_len = strlen(name);
|
|
e = buf + buf_len;
|
|
len = -1;
|
|
dst[0] = '\0';
|
|
|
|
// buf is "var1=val1&var2=val2...". Find variable first
|
|
for (p = buf; p != NULL && p + name_len < e; p++) {
|
|
if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
|
|
!mg_strncasecmp(name, p, name_len)) {
|
|
|
|
// Point p to variable value
|
|
p += name_len + 1;
|
|
|
|
// Point s to the end of the value
|
|
s = (const char *) memchr(p, '&', (size_t)(e - p));
|
|
if (s == NULL) {
|
|
s = e;
|
|
}
|
|
assert(s >= p);
|
|
|
|
// Decode variable into destination buffer
|
|
if ((size_t) (s - p) < dst_len) {
|
|
len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
|
|
char *dst, size_t dst_size) {
|
|
const char *s, *p, *end;
|
|
int name_len, len = -1;
|
|
|
|
dst[0] = '\0';
|
|
if ((s = mg_get_header(conn, "Cookie")) == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
name_len = strlen(cookie_name);
|
|
end = s + strlen(s);
|
|
|
|
for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
|
|
if (s[name_len] == '=') {
|
|
s += name_len + 1;
|
|
if ((p = strchr(s, ' ')) == NULL)
|
|
p = end;
|
|
if (p[-1] == ';')
|
|
p--;
|
|
if (*s == '"' && p[-1] == '"' && p > s + 1) {
|
|
s++;
|
|
p--;
|
|
}
|
|
if ((size_t) (p - s) < dst_size) {
|
|
len = (p - s) + 1;
|
|
mg_strlcpy(dst, s, (size_t)len);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
|
|
size_t buf_len, struct mgstat *st) {
|
|
struct vec a, b;
|
|
const char *rewrite, *uri = conn->request_info.uri;
|
|
char *p;
|
|
int match_len, stat_result;
|
|
|
|
buf_len--; // This is because memmove() for PATH_INFO may shift part
|
|
// of the path one byte on the right.
|
|
mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT],
|
|
uri);
|
|
|
|
rewrite = conn->ctx->config[REWRITE];
|
|
while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
|
|
if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
|
|
mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
//change_slashes_to_backslashes(buf);
|
|
#endif // _WIN32
|
|
|
|
if ((stat_result = mg_stat(buf, st)) != 0) {
|
|
// Support PATH_INFO for CGI scripts.
|
|
for (p = buf + strlen(buf); p > buf + 1; p--) {
|
|
if (*p == '/') {
|
|
*p = '\0';
|
|
if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
|
|
strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
|
|
(stat_result = mg_stat(buf, st)) == 0) {
|
|
// Shift PATH_INFO block one character right, e.g.
|
|
// "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00"
|
|
// conn->path_info is pointing to the local variable "path" declared
|
|
// in handle_request(), so PATH_INFO not valid after
|
|
// handle_request returns.
|
|
conn->path_info = p + 1;
|
|
memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0
|
|
p[1] = '/';
|
|
break;
|
|
} else {
|
|
*p = '/';
|
|
stat_result = -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return stat_result;
|
|
}
|
|
|
|
static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
|
|
return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
|
|
SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
|
|
func(conn->ssl) == 1;
|
|
}
|
|
|
|
// Check whether full request is buffered. Return:
|
|
// -1 if request is malformed
|
|
// 0 if request is not yet fully buffered
|
|
// >0 actual request length, including last \r\n\r\n
|
|
static int get_request_len(const char *buf, int buflen) {
|
|
const char *s, *e;
|
|
int len = 0;
|
|
|
|
DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
|
|
for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
|
|
// Control characters are not allowed but >=128 is.
|
|
if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
|
|
*s != '\n' && * (const unsigned char *) s < 128) {
|
|
len = -1;
|
|
} else if (s[0] == '\n' && s[1] == '\n') {
|
|
len = (int) (s - buf) + 2;
|
|
} else if (s[0] == '\n' && &s[1] < e &&
|
|
s[1] == '\r' && s[2] == '\n') {
|
|
len = (int) (s - buf) + 3;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
// Convert month to the month number. Return -1 on error, or month number
|
|
static int get_month_index(const char *s) {
|
|
size_t i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(month_names); i++)
|
|
if (!strcmp(s, month_names[i]))
|
|
return (int) i;
|
|
|
|
return -1;
|
|
}
|
|
|
|
// Parse UTC date-time string, and return the corresponding time_t value.
|
|
static time_t parse_date_string(const char *datetime) {
|
|
static const unsigned short days_before_month[] = {
|
|
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
|
|
};
|
|
char month_str[32];
|
|
int second, minute, hour, day, month, year, leap_days, days;
|
|
time_t result = (time_t) 0;
|
|
|
|
if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
|
|
&day, month_str, &year, &hour, &minute, &second) == 6) ||
|
|
(sscanf(datetime, "%d %3s %d %d:%d:%d",
|
|
&day, month_str, &year, &hour, &minute, &second) == 6) ||
|
|
(sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
|
|
&day, month_str, &year, &hour, &minute, &second) == 6) ||
|
|
(sscanf(datetime, "%d-%3s-%d %d:%d:%d",
|
|
&day, month_str, &year, &hour, &minute, &second) == 6)) &&
|
|
year > 1970 &&
|
|
(month = get_month_index(month_str)) != -1) {
|
|
year -= 1970;
|
|
leap_days = year / 4 - year / 100 + year / 400;
|
|
days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
|
|
result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// Protect against directory disclosure attack by removing '..',
|
|
// excessive '/' and '\' characters
|
|
static void remove_double_dots_and_double_slashes(char *s) {
|
|
char *p = s;
|
|
|
|
while (*s != '\0') {
|
|
*p++ = *s++;
|
|
if (IS_DIRSEP_CHAR(s[-1])) {
|
|
// Skip all following slashes and backslashes
|
|
while (IS_DIRSEP_CHAR(s[0])) {
|
|
s++;
|
|
}
|
|
|
|
// Skip all double-dots
|
|
while (*s == '.' && s[1] == '.') {
|
|
s += 2;
|
|
}
|
|
}
|
|
}
|
|
*p = '\0';
|
|
}
|
|
|
|
static const struct {
|
|
const char *extension;
|
|
size_t ext_len;
|
|
const char *mime_type;
|
|
size_t mime_type_len;
|
|
} builtin_mime_types[] = {
|
|
{".html", 5, "text/html", 9},
|
|
{".htm", 4, "text/html", 9},
|
|
{".shtm", 5, "text/html", 9},
|
|
{".shtml", 6, "text/html", 9},
|
|
{".css", 4, "text/css", 8},
|
|
{".js", 3, "application/x-javascript", 24},
|
|
{".ico", 4, "image/x-icon", 12},
|
|
{".gif", 4, "image/gif", 9},
|
|
{".jpg", 4, "image/jpeg", 10},
|
|
{".jpeg", 5, "image/jpeg", 10},
|
|
{".png", 4, "image/png", 9},
|
|
{".svg", 4, "image/svg+xml", 13},
|
|
{".torrent", 8, "application/x-bittorrent", 24},
|
|
{".wav", 4, "audio/x-wav", 11},
|
|
{".mp3", 4, "audio/x-mp3", 11},
|
|
{".mid", 4, "audio/mid", 9},
|
|
{".m3u", 4, "audio/x-mpegurl", 15},
|
|
{".ram", 4, "audio/x-pn-realaudio", 20},
|
|
{".xml", 4, "text/xml", 8},
|
|
{".xslt", 5, "application/xml", 15},
|
|
{".ra", 3, "audio/x-pn-realaudio", 20},
|
|
{".doc", 4, "application/msword", 19},
|
|
{".exe", 4, "application/octet-stream", 24},
|
|
{".zip", 4, "application/x-zip-compressed", 28},
|
|
{".xls", 4, "application/excel", 17},
|
|
{".tgz", 4, "application/x-tar-gz", 20},
|
|
{".tar", 4, "application/x-tar", 17},
|
|
{".gz", 3, "application/x-gunzip", 20},
|
|
{".arj", 4, "application/x-arj-compressed", 28},
|
|
{".rar", 4, "application/x-arj-compressed", 28},
|
|
{".rtf", 4, "application/rtf", 15},
|
|
{".pdf", 4, "application/pdf", 15},
|
|
{".swf", 4, "application/x-shockwave-flash",29},
|
|
{".mpg", 4, "video/mpeg", 10},
|
|
{".mpeg", 5, "video/mpeg", 10},
|
|
{".mp4", 4, "video/mp4", 9},
|
|
{".m4v", 4, "video/x-m4v", 11},
|
|
{".asf", 4, "video/x-ms-asf", 14},
|
|
{".avi", 4, "video/x-msvideo", 15},
|
|
{".bmp", 4, "image/bmp", 9},
|
|
{NULL, 0, NULL, 0}
|
|
};
|
|
|
|
// Look at the "path" extension and figure what mime type it has.
|
|
// Store mime type in the vector.
|
|
static void get_mime_type(struct mg_context *ctx, const char *path,
|
|
struct vec *vec) {
|
|
struct vec ext_vec, mime_vec;
|
|
const char *list, *ext;
|
|
size_t i, path_len;
|
|
|
|
path_len = strlen(path);
|
|
|
|
// Scan user-defined mime types first, in case user wants to
|
|
// override default mime types.
|
|
list = ctx->config[EXTRA_MIME_TYPES];
|
|
while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
|
|
// ext now points to the path suffix
|
|
ext = path + path_len - ext_vec.len;
|
|
if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
|
|
*vec = mime_vec;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Now scan built-in mime types
|
|
for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
|
|
ext = path + (path_len - builtin_mime_types[i].ext_len);
|
|
if (path_len > builtin_mime_types[i].ext_len &&
|
|
mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
|
|
vec->ptr = builtin_mime_types[i].mime_type;
|
|
vec->len = builtin_mime_types[i].mime_type_len;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Nothing found. Fall back to "text/plain"
|
|
vec->ptr = "text/plain";
|
|
vec->len = 10;
|
|
}
|
|
|
|
#ifndef HAVE_MD5
|
|
typedef struct MD5Context {
|
|
uint32_t buf[4];
|
|
uint32_t bits[2];
|
|
unsigned char in[64];
|
|
} MD5_CTX;
|
|
|
|
#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
|
|
#define byteReverse(buf, len) // Do nothing
|
|
#else
|
|
static void byteReverse(unsigned char *buf, unsigned longs) {
|
|
uint32_t t;
|
|
do {
|
|
t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
|
|
((unsigned) buf[1] << 8 | buf[0]);
|
|
*(uint32_t *) buf = t;
|
|
buf += 4;
|
|
} while (--longs);
|
|
}
|
|
#endif
|
|
|
|
#define F1(x, y, z) (z ^ (x & (y ^ z)))
|
|
#define F2(x, y, z) F1(z, x, y)
|
|
#define F3(x, y, z) (x ^ y ^ z)
|
|
#define F4(x, y, z) (y ^ (x | ~z))
|
|
|
|
#define MD5STEP(f, w, x, y, z, data, s) \
|
|
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
|
|
|
|
// Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
|
|
// initialization constants.
|
|
static void MD5Init(MD5_CTX *ctx) {
|
|
ctx->buf[0] = 0x67452301;
|
|
ctx->buf[1] = 0xefcdab89;
|
|
ctx->buf[2] = 0x98badcfe;
|
|
ctx->buf[3] = 0x10325476;
|
|
|
|
ctx->bits[0] = 0;
|
|
ctx->bits[1] = 0;
|
|
}
|
|
|
|
static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
|
|
register uint32_t a, b, c, d;
|
|
|
|
a = buf[0];
|
|
b = buf[1];
|
|
c = buf[2];
|
|
d = buf[3];
|
|
|
|
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
|
|
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
|
|
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
|
|
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
|
|
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
|
|
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
|
|
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
|
|
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
|
|
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
|
|
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
|
|
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
|
|
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
|
|
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
|
|
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
|
|
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
|
|
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
|
|
|
|
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
|
|
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
|
|
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
|
|
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
|
|
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
|
|
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
|
|
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
|
|
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
|
|
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
|
|
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
|
|
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
|
|
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
|
|
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
|
|
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
|
|
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
|
|
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
|
|
|
|
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
|
|
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
|
|
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
|
|
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
|
|
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
|
|
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
|
|
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
|
|
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
|
|
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
|
|
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
|
|
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
|
|
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
|
|
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
|
|
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
|
|
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
|
|
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
|
|
|
|
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
|
|
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
|
|
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
|
|
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
|
|
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
|
|
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
|
|
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
|
|
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
|
|
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
|
|
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
|
|
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
|
|
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
|
|
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
|
|
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
|
|
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
|
|
|
|
buf[0] += a;
|
|
buf[1] += b;
|
|
buf[2] += c;
|
|
buf[3] += d;
|
|
}
|
|
|
|
static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
|
|
uint32_t t;
|
|
|
|
t = ctx->bits[0];
|
|
if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
|
|
ctx->bits[1]++;
|
|
ctx->bits[1] += len >> 29;
|
|
|
|
t = (t >> 3) & 0x3f;
|
|
|
|
if (t) {
|
|
unsigned char *p = (unsigned char *) ctx->in + t;
|
|
|
|
t = 64 - t;
|
|
if (len < t) {
|
|
memcpy(p, buf, len);
|
|
return;
|
|
}
|
|
memcpy(p, buf, t);
|
|
byteReverse(ctx->in, 16);
|
|
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
|
|
buf += t;
|
|
len -= t;
|
|
}
|
|
|
|
while (len >= 64) {
|
|
memcpy(ctx->in, buf, 64);
|
|
byteReverse(ctx->in, 16);
|
|
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
|
|
buf += 64;
|
|
len -= 64;
|
|
}
|
|
|
|
memcpy(ctx->in, buf, len);
|
|
}
|
|
|
|
static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
|
|
unsigned count;
|
|
unsigned char *p;
|
|
|
|
count = (ctx->bits[0] >> 3) & 0x3F;
|
|
|
|
p = ctx->in + count;
|
|
*p++ = 0x80;
|
|
count = 64 - 1 - count;
|
|
if (count < 8) {
|
|
memset(p, 0, count);
|
|
byteReverse(ctx->in, 16);
|
|
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
|
|
memset(ctx->in, 0, 56);
|
|
} else {
|
|
memset(p, 0, count - 8);
|
|
}
|
|
byteReverse(ctx->in, 14);
|
|
|
|
((uint32_t *) ctx->in)[14] = ctx->bits[0];
|
|
((uint32_t *) ctx->in)[15] = ctx->bits[1];
|
|
|
|
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
|
|
byteReverse((unsigned char *) ctx->buf, 4);
|
|
memcpy(digest, ctx->buf, 16);
|
|
memset((char *) ctx, 0, sizeof(*ctx));
|
|
}
|
|
#endif // !HAVE_MD5
|
|
|
|
// Stringify binary data. Output buffer must be twice as big as input,
|
|
// because each byte takes 2 bytes in string representation
|
|
static void bin2str(char *to, const unsigned char *p, size_t len) {
|
|
static const char *hex = "0123456789abcdef";
|
|
|
|
for (; len--; p++) {
|
|
*to++ = hex[p[0] >> 4];
|
|
*to++ = hex[p[0] & 0x0f];
|
|
}
|
|
*to = '\0';
|
|
}
|
|
|
|
// Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes.
|
|
void mg_md5(char *buf, ...) {
|
|
unsigned char hash[16];
|
|
const char *p;
|
|
va_list ap;
|
|
MD5_CTX ctx;
|
|
|
|
MD5Init(&ctx);
|
|
|
|
va_start(ap, buf);
|
|
while ((p = va_arg(ap, const char *)) != NULL) {
|
|
MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
|
|
}
|
|
va_end(ap);
|
|
|
|
MD5Final(hash, &ctx);
|
|
bin2str(buf, hash, sizeof(hash));
|
|
}
|
|
|
|
// Check the user's password, return 1 if OK
|
|
static int check_password(const char *method, const char *ha1, const char *uri,
|
|
const char *nonce, const char *nc, const char *cnonce,
|
|
const char *qop, const char *response) {
|
|
char ha2[32 + 1], expected_response[32 + 1];
|
|
|
|
// Some of the parameters may be NULL
|
|
if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
|
|
qop == NULL || response == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
// NOTE(lsm): due to a bug in MSIE, we do not compare the URI
|
|
// TODO(lsm): check for authentication timeout
|
|
if (// strcmp(dig->uri, c->ouri) != 0 ||
|
|
strlen(response) != 32
|
|
// || now - strtoul(dig->nonce, NULL, 10) > 3600
|
|
) {
|
|
return 0;
|
|
}
|
|
|
|
mg_md5(ha2, method, ":", uri, NULL);
|
|
mg_md5(expected_response, ha1, ":", nonce, ":", nc,
|
|
":", cnonce, ":", qop, ":", ha2, NULL);
|
|
|
|
return mg_strcasecmp(response, expected_response) == 0;
|
|
}
|
|
|
|
// Use the global passwords file, if specified by auth_gpass option,
|
|
// or search for .htpasswd in the requested directory.
|
|
static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
|
|
struct mg_context *ctx = conn->ctx;
|
|
char name[PATH_MAX];
|
|
const char *p, *e;
|
|
struct mgstat st;
|
|
FILE *fp;
|
|
|
|
if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
|
|
// Use global passwords file
|
|
fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
|
|
if (fp == NULL)
|
|
cry(fc(ctx), "fopen(%s): %s",
|
|
ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
|
|
} else if (!mg_stat(path, &st) && st.is_directory) {
|
|
(void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
|
|
path, DIRSEP, PASSWORDS_FILE_NAME);
|
|
fp = mg_fopen(name, "r");
|
|
} else {
|
|
// Try to find .htpasswd in requested directory.
|
|
for (p = path, e = p + strlen(p) - 1; e > p; e--)
|
|
if (IS_DIRSEP_CHAR(*e))
|
|
break;
|
|
(void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
|
|
(int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
|
|
fp = mg_fopen(name, "r");
|
|
}
|
|
|
|
return fp;
|
|
}
|
|
|
|
// Parsed Authorization header
|
|
struct ah {
|
|
char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
|
|
};
|
|
|
|
static int parse_auth_header(struct mg_connection *conn, char *buf,
|
|
size_t buf_size, struct ah *ah) {
|
|
char *name, *value, *s;
|
|
const char *auth_header;
|
|
|
|
if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
|
|
mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
|
|
return 0;
|
|
}
|
|
|
|
// Make modifiable copy of the auth header
|
|
(void) mg_strlcpy(buf, auth_header + 7, buf_size);
|
|
|
|
s = buf;
|
|
(void) memset(ah, 0, sizeof(*ah));
|
|
|
|
// Parse authorization header
|
|
for (;;) {
|
|
// Gobble initial spaces
|
|
while (isspace(* (unsigned char *) s)) {
|
|
s++;
|
|
}
|
|
name = skip_quoted(&s, "=", " ", 0);
|
|
// Value is either quote-delimited, or ends at first comma or space.
|
|
if (s[0] == '\"') {
|
|
s++;
|
|
value = skip_quoted(&s, "\"", " ", '\\');
|
|
if (s[0] == ',') {
|
|
s++;
|
|
}
|
|
} else {
|
|
value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces
|
|
}
|
|
if (*name == '\0') {
|
|
break;
|
|
}
|
|
|
|
if (!strcmp(name, "username")) {
|
|
ah->user = value;
|
|
} else if (!strcmp(name, "cnonce")) {
|
|
ah->cnonce = value;
|
|
} else if (!strcmp(name, "response")) {
|
|
ah->response = value;
|
|
} else if (!strcmp(name, "uri")) {
|
|
ah->uri = value;
|
|
} else if (!strcmp(name, "qop")) {
|
|
ah->qop = value;
|
|
} else if (!strcmp(name, "nc")) {
|
|
ah->nc = value;
|
|
} else if (!strcmp(name, "nonce")) {
|
|
ah->nonce = value;
|
|
}
|
|
}
|
|
|
|
// CGI needs it as REMOTE_USER
|
|
if (ah->user != NULL) {
|
|
conn->request_info.remote_user = mg_strdup(ah->user);
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
// Authorize against the opened passwords file. Return 1 if authorized.
|
|
static int authorize(struct mg_connection *conn, FILE *fp) {
|
|
struct ah ah;
|
|
char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
|
|
|
|
if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
|
|
return 0;
|
|
}
|
|
|
|
// Loop over passwords file
|
|
while (fgets(line, sizeof(line), fp) != NULL) {
|
|
if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
|
|
continue;
|
|
}
|
|
|
|
if (!strcmp(ah.user, f_user) &&
|
|
!strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
|
|
return check_password(
|
|
conn->request_info.request_method,
|
|
ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
|
|
ah.response);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Return 1 if request is authorised, 0 otherwise.
|
|
static int check_authorization(struct mg_connection *conn, const char *path) {
|
|
FILE *fp;
|
|
char fname[PATH_MAX];
|
|
struct vec uri_vec, filename_vec;
|
|
const char *list;
|
|
int authorized;
|
|
|
|
fp = NULL;
|
|
authorized = 1;
|
|
|
|
list = conn->ctx->config[PROTECT_URI];
|
|
while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
|
|
if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
|
|
(void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
|
|
filename_vec.len, filename_vec.ptr);
|
|
if ((fp = mg_fopen(fname, "r")) == NULL) {
|
|
cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (fp == NULL) {
|
|
fp = open_auth_file(conn, path);
|
|
}
|
|
|
|
if (fp != NULL) {
|
|
authorized = authorize(conn, fp);
|
|
(void) fclose(fp);
|
|
}
|
|
|
|
return authorized;
|
|
}
|
|
|
|
static void send_authorization_request(struct mg_connection *conn) {
|
|
conn->request_info.status_code = 401;
|
|
(void) mg_printf(conn,
|
|
"HTTP/1.1 401 Unauthorized\r\n"
|
|
"Content-Length: 0\r\n"
|
|
"WWW-Authenticate: Digest qop=\"auth\", "
|
|
"realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
|
|
conn->ctx->config[AUTHENTICATION_DOMAIN],
|
|
(unsigned long) time(NULL));
|
|
}
|
|
|
|
static int is_authorized_for_put(struct mg_connection *conn) {
|
|
FILE *fp;
|
|
int ret = 0;
|
|
|
|
fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
|
|
mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
|
|
|
|
if (fp != NULL) {
|
|
ret = authorize(conn, fp);
|
|
(void) fclose(fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int mg_modify_passwords_file(const char *fname, const char *domain,
|
|
const char *user, const char *pass) {
|
|
int found;
|
|
char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
|
|
FILE *fp, *fp2;
|
|
|
|
found = 0;
|
|
fp = fp2 = NULL;
|
|
|
|
// Regard empty password as no password - remove user record.
|
|
if (pass != NULL && pass[0] == '\0') {
|
|
pass = NULL;
|
|
}
|
|
|
|
(void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
|
|
|
|
// Create the file if does not exist
|
|
if ((fp = mg_fopen(fname, "a+")) != NULL) {
|
|
(void) fclose(fp);
|
|
}
|
|
|
|
// Open the given file and temporary file
|
|
if ((fp = mg_fopen(fname, "r")) == NULL) {
|
|
return 0;
|
|
} else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
// Copy the stuff to temporary file
|
|
while (fgets(line, sizeof(line), fp) != NULL) {
|
|
if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
|
|
continue;
|
|
}
|
|
|
|
if (!strcmp(u, user) && !strcmp(d, domain)) {
|
|
found++;
|
|
if (pass != NULL) {
|
|
mg_md5(ha1, user, ":", domain, ":", pass, NULL);
|
|
fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
|
|
}
|
|
} else {
|
|
(void) fprintf(fp2, "%s", line);
|
|
}
|
|
}
|
|
|
|
// If new user, just add it
|
|
if (!found && pass != NULL) {
|
|
mg_md5(ha1, user, ":", domain, ":", pass, NULL);
|
|
(void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
|
|
}
|
|
|
|
// Close files
|
|
(void) fclose(fp);
|
|
(void) fclose(fp2);
|
|
|
|
// Put the temp file in place of real file
|
|
(void) mg_remove(fname);
|
|
(void) mg_rename(tmp, fname);
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct de {
|
|
struct mg_connection *conn;
|
|
char *file_name;
|
|
struct mgstat st;
|
|
};
|
|
|
|
static void url_encode(const char *src, char *dst, size_t dst_len) {
|
|
static const char *dont_escape = "._-$,;~()";
|
|
static const char *hex = "0123456789abcdef";
|
|
const char *end = dst + dst_len - 1;
|
|
|
|
for (; *src != '\0' && dst < end; src++, dst++) {
|
|
if (isalnum(*(const unsigned char *) src) ||
|
|
strchr(dont_escape, * (const unsigned char *) src) != NULL) {
|
|
*dst = *src;
|
|
} else if (dst + 2 < end) {
|
|
dst[0] = '%';
|
|
dst[1] = hex[(* (const unsigned char *) src) >> 4];
|
|
dst[2] = hex[(* (const unsigned char *) src) & 0xf];
|
|
dst += 2;
|
|
}
|
|
}
|
|
|
|
*dst = '\0';
|
|
}
|
|
|
|
static void print_dir_entry(struct de *de) {
|
|
char size[64], mod[64], href[PATH_MAX];
|
|
|
|
if (de->st.is_directory) {
|
|
(void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
|
|
} else {
|
|
// We use (signed) cast below because MSVC 6 compiler cannot
|
|
// convert unsigned __int64 to double. Sigh.
|
|
if (de->st.size < 1024) {
|
|
(void) mg_snprintf(de->conn, size, sizeof(size),
|
|
"%lu", (unsigned long) de->st.size);
|
|
} else if (de->st.size < 1024 * 1024) {
|
|
(void) mg_snprintf(de->conn, size, sizeof(size),
|
|
"%.1fk", (double) de->st.size / 1024.0);
|
|
} else if (de->st.size < 1024 * 1024 * 1024) {
|
|
(void) mg_snprintf(de->conn, size, sizeof(size),
|
|
"%.1fM", (double) de->st.size / 1048576);
|
|
} else {
|
|
(void) mg_snprintf(de->conn, size, sizeof(size),
|
|
"%.1fG", (double) de->st.size / 1073741824);
|
|
}
|
|
}
|
|
(void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
|
|
url_encode(de->file_name, href, sizeof(href));
|
|
de->conn->num_bytes_sent += mg_printf(de->conn,
|
|
"<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
|
|
"<td> %s</td><td> %s</td></tr>\n",
|
|
de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
|
|
de->file_name, de->st.is_directory ? "/" : "", mod, size);
|
|
}
|
|
|
|
// This function is called from send_directory() and used for
|
|
// sorting directory entries by size, or name, or modification time.
|
|
// On windows, __cdecl specification is needed in case if project is built
|
|
// with __stdcall convention. qsort always requires __cdels callback.
|
|
static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
|
|
const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
|
|
const char *query_string = a->conn->request_info.query_string;
|
|
int cmp_result = 0;
|
|
|
|
if (query_string == NULL) {
|
|
query_string = "na";
|
|
}
|
|
|
|
if (a->st.is_directory && !b->st.is_directory) {
|
|
return -1; // Always put directories on top
|
|
} else if (!a->st.is_directory && b->st.is_directory) {
|
|
return 1; // Always put directories on top
|
|
} else if (*query_string == 'n') {
|
|
cmp_result = strcmp(a->file_name, b->file_name);
|
|
} else if (*query_string == 's') {
|
|
cmp_result = a->st.size == b->st.size ? 0 :
|
|
a->st.size > b->st.size ? 1 : -1;
|
|
} else if (*query_string == 'd') {
|
|
cmp_result = a->st.mtime == b->st.mtime ? 0 :
|
|
a->st.mtime > b->st.mtime ? 1 : -1;
|
|
}
|
|
|
|
return query_string[1] == 'd' ? -cmp_result : cmp_result;
|
|
}
|
|
|
|
static int scan_directory(struct mg_connection *conn, const char *dir,
|
|
void *data, void (*cb)(struct de *, void *)) {
|
|
char path[PATH_MAX];
|
|
struct dirent *dp;
|
|
DIR *dirp;
|
|
struct de de;
|
|
|
|
if ((dirp = opendir(dir)) == NULL) {
|
|
return 0;
|
|
} else {
|
|
de.conn = conn;
|
|
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
// Do not show current dir and passwords file
|
|
if (!strcmp(dp->d_name, ".") ||
|
|
!strcmp(dp->d_name, "..") ||
|
|
!strcmp(dp->d_name, PASSWORDS_FILE_NAME))
|
|
continue;
|
|
|
|
mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
|
|
|
|
// If we don't memset stat structure to zero, mtime will have
|
|
// garbage and strftime() will segfault later on in
|
|
// print_dir_entry(). memset is required only if mg_stat()
|
|
// fails. For more details, see
|
|
// http://code.google.com/p/mongoose/issues/detail?id=79
|
|
if (mg_stat(path, &de.st) != 0) {
|
|
memset(&de.st, 0, sizeof(de.st));
|
|
}
|
|
de.file_name = dp->d_name;
|
|
|
|
cb(&de, data);
|
|
}
|
|
(void) closedir(dirp);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
struct dir_scan_data {
|
|
struct de *entries;
|
|
int num_entries;
|
|
int arr_size;
|
|
};
|
|
|
|
static void dir_scan_callback(struct de *de, void *data) {
|
|
struct dir_scan_data *dsd = (struct dir_scan_data *) data;
|
|
|
|
if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
|
|
dsd->arr_size *= 2;
|
|
dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
|
|
sizeof(dsd->entries[0]));
|
|
}
|
|
if (dsd->entries == NULL) {
|
|
// TODO(lsm): propagate an error to the caller
|
|
dsd->num_entries = 0;
|
|
} else {
|
|
dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
|
|
dsd->entries[dsd->num_entries].st = de->st;
|
|
dsd->entries[dsd->num_entries].conn = de->conn;
|
|
dsd->num_entries++;
|
|
}
|
|
}
|
|
|
|
static void handle_directory_request(struct mg_connection *conn,
|
|
const char *dir) {
|
|
int i, sort_direction;
|
|
struct dir_scan_data data = { NULL, 0, 128 };
|
|
|
|
if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
|
|
send_http_error(conn, 500, "Cannot open directory",
|
|
"Error: opendir(%s): %s", dir, strerror(ERRNO));
|
|
return;
|
|
}
|
|
|
|
sort_direction = conn->request_info.query_string != NULL &&
|
|
conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
|
|
|
|
conn->must_close = 1;
|
|
mg_printf(conn, "%s",
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Connection: close\r\n"
|
|
"Content-Type: text/html; charset=utf-8\r\n\r\n");
|
|
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<html><head><title>Index of %s</title>"
|
|
"<style>th {text-align: left;}</style></head>"
|
|
"<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
|
|
"<tr><th><a href=\"?n%c\">Name</a></th>"
|
|
"<th><a href=\"?d%c\">Modified</a></th>"
|
|
"<th><a href=\"?s%c\">Size</a></th></tr>"
|
|
"<tr><td colspan=\"3\"><hr></td></tr>",
|
|
conn->request_info.uri, conn->request_info.uri,
|
|
sort_direction, sort_direction, sort_direction);
|
|
|
|
// Print first entry - link to a parent directory
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<tr><td><a href=\"%s%s\">%s</a></td>"
|
|
"<td> %s</td><td> %s</td></tr>\n",
|
|
conn->request_info.uri, "..", "Parent directory", "-", "-");
|
|
|
|
// Sort and print directory entries
|
|
qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
|
|
compare_dir_entries);
|
|
for (i = 0; i < data.num_entries; i++) {
|
|
print_dir_entry(&data.entries[i]);
|
|
free(data.entries[i].file_name);
|
|
}
|
|
free(data.entries);
|
|
|
|
conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
|
|
conn->request_info.status_code = 200;
|
|
}
|
|
|
|
// Send len bytes from the opened file to the client.
|
|
static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
|
|
char buf[BUFSIZ];
|
|
int to_read, num_read, num_written;
|
|
|
|
while (len > 0) {
|
|
// Calculate how much to read from the file in the buffer
|
|
to_read = sizeof(buf);
|
|
if ((int64_t) to_read > len)
|
|
to_read = (int) len;
|
|
|
|
// Read from file, exit the loop on error
|
|
if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
|
|
break;
|
|
|
|
// Send read bytes to the client, exit the loop on error
|
|
if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
|
|
break;
|
|
|
|
// Both read and were successful, adjust counters
|
|
conn->num_bytes_sent += num_written;
|
|
len -= num_written;
|
|
}
|
|
}
|
|
|
|
static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
|
|
return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
|
|
}
|
|
|
|
static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
|
|
strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
|
|
}
|
|
|
|
static void handle_file_request(struct mg_connection *conn, const char *path,
|
|
struct mgstat *stp) {
|
|
char date[64], lm[64], etag[64], range[64];
|
|
const char *msg = "OK", *hdr;
|
|
time_t curtime = time(NULL);
|
|
int64_t cl, r1, r2;
|
|
struct vec mime_vec;
|
|
FILE *fp;
|
|
int n;
|
|
|
|
get_mime_type(conn->ctx, path, &mime_vec);
|
|
cl = stp->size;
|
|
conn->request_info.status_code = 200;
|
|
range[0] = '\0';
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen(%s): %s", path, strerror(ERRNO));
|
|
return;
|
|
}
|
|
set_close_on_exec(fileno(fp));
|
|
|
|
// If Range: header specified, act accordingly
|
|
r1 = r2 = 0;
|
|
hdr = mg_get_header(conn, "Range");
|
|
if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
|
|
conn->request_info.status_code = 206;
|
|
(void) fseeko(fp, (off_t) r1, SEEK_SET);
|
|
cl = n == 2 ? r2 - r1 + 1: cl - r1;
|
|
(void) mg_snprintf(conn, range, sizeof(range),
|
|
"Content-Range: bytes "
|
|
"%" INT64_FMT "-%"
|
|
INT64_FMT "/%" INT64_FMT "\r\n",
|
|
r1, r1 + cl - 1, stp->size);
|
|
msg = "Partial Content";
|
|
}
|
|
|
|
// Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
|
|
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
|
|
gmt_time_string(date, sizeof(date), &curtime);
|
|
gmt_time_string(lm, sizeof(lm), &stp->mtime);
|
|
(void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
|
|
(unsigned long) stp->mtime, (unsigned long) stp->size);
|
|
|
|
(void) mg_printf(conn,
|
|
"HTTP/1.1 %d %s\r\n"
|
|
"Date: %s\r\n"
|
|
"Last-Modified: %s\r\n"
|
|
"Etag: \"%s\"\r\n"
|
|
"Content-Type: %.*s\r\n"
|
|
"Content-Length: %" INT64_FMT "\r\n"
|
|
"Connection: %s\r\n"
|
|
"Accept-Ranges: bytes\r\n"
|
|
"%s\r\n",
|
|
conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len,
|
|
mime_vec.ptr, cl, suggest_connection_header(conn), range);
|
|
|
|
if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
|
|
send_file_data(conn, fp, cl);
|
|
}
|
|
(void) fclose(fp);
|
|
}
|
|
|
|
void mg_send_file(struct mg_connection *conn, const char *path) {
|
|
struct mgstat st;
|
|
if (mg_stat(path, &st) == 0) {
|
|
handle_file_request(conn, path, &st);
|
|
} else {
|
|
send_http_error(conn, 404, "Not Found", "%s", "File not found");
|
|
}
|
|
}
|
|
|
|
|
|
// Parse HTTP headers from the given buffer, advance buffer to the point
|
|
// where parsing stopped.
|
|
static void parse_http_headers(char **buf, struct mg_request_info *ri) {
|
|
int i;
|
|
|
|
for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
|
|
ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
|
|
ri->http_headers[i].value = skip(buf, "\r\n");
|
|
if (ri->http_headers[i].name[0] == '\0')
|
|
break;
|
|
ri->num_headers = i + 1;
|
|
}
|
|
}
|
|
|
|
static int is_valid_http_method(const char *method) {
|
|
return !strcmp(method, "GET") || !strcmp(method, "POST") ||
|
|
!strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
|
|
!strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
|
|
!strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
|
|
}
|
|
|
|
// Parse HTTP request, fill in mg_request_info structure.
|
|
static int parse_http_request(char *buf, struct mg_request_info *ri) {
|
|
int status = 0;
|
|
|
|
// RFC says that all initial whitespaces should be ingored
|
|
while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
|
|
buf++;
|
|
}
|
|
|
|
ri->request_method = skip(&buf, " ");
|
|
ri->uri = skip(&buf, " ");
|
|
ri->http_version = skip(&buf, "\r\n");
|
|
|
|
if (is_valid_http_method(ri->request_method) &&
|
|
strncmp(ri->http_version, "HTTP/", 5) == 0) {
|
|
ri->http_version += 5; // Skip "HTTP/"
|
|
parse_http_headers(&buf, ri);
|
|
status = 1;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
// Keep reading the input (either opened file descriptor fd, or socket sock,
|
|
// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
|
|
// buffer (which marks the end of HTTP request). Buffer buf may already
|
|
// have some data. The length of the data is stored in nread.
|
|
// Upon every read operation, increase nread by the number of bytes read.
|
|
static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
|
|
int *nread) {
|
|
int n, request_len;
|
|
|
|
request_len = 0;
|
|
while (*nread < bufsiz && request_len == 0) {
|
|
n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
|
|
if (n <= 0) {
|
|
break;
|
|
} else {
|
|
*nread += n;
|
|
request_len = get_request_len(buf, *nread);
|
|
}
|
|
}
|
|
|
|
return request_len;
|
|
}
|
|
|
|
// For given directory path, substitute it to valid index file.
|
|
// Return 0 if index file has been found, -1 if not found.
|
|
// If the file is found, it's stats is returned in stp.
|
|
static int substitute_index_file(struct mg_connection *conn, char *path,
|
|
size_t path_len, struct mgstat *stp) {
|
|
const char *list = conn->ctx->config[INDEX_FILES];
|
|
struct mgstat st;
|
|
struct vec filename_vec;
|
|
size_t n = strlen(path);
|
|
int found = 0;
|
|
|
|
// The 'path' given to us points to the directory. Remove all trailing
|
|
// directory separator characters from the end of the path, and
|
|
// then append single directory separator character.
|
|
while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
|
|
n--;
|
|
}
|
|
path[n] = DIRSEP;
|
|
|
|
// Traverse index files list. For each entry, append it to the given
|
|
// path and see if the file exists. If it exists, break the loop
|
|
while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
|
|
|
|
// Ignore too long entries that may overflow path buffer
|
|
if (filename_vec.len > path_len - (n + 2))
|
|
continue;
|
|
|
|
// Prepare full path to the index file
|
|
(void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
|
|
|
|
// Does it exist?
|
|
if (mg_stat(path, &st) == 0) {
|
|
// Yes it does, break the loop
|
|
*stp = st;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If no index file exists, restore directory path
|
|
if (!found) {
|
|
path[n] = '\0';
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
// Return True if we should reply 304 Not Modified.
|
|
static int is_not_modified(const struct mg_connection *conn,
|
|
const struct mgstat *stp) {
|
|
const char *ims = mg_get_header(conn, "If-Modified-Since");
|
|
return ims != NULL && stp->mtime <= parse_date_string(ims);
|
|
}
|
|
|
|
static int forward_body_data(struct mg_connection *conn, FILE *fp,
|
|
SOCKET sock, SSL *ssl) {
|
|
const char *expect, *buffered;
|
|
char buf[BUFSIZ];
|
|
int to_read, nread, buffered_len, success = 0;
|
|
|
|
expect = mg_get_header(conn, "Expect");
|
|
assert(fp != NULL);
|
|
|
|
if (conn->content_len == -1) {
|
|
send_http_error(conn, 411, "Length Required", "");
|
|
} else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
|
|
send_http_error(conn, 417, "Expectation Failed", "");
|
|
} else {
|
|
if (expect != NULL) {
|
|
(void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
|
|
}
|
|
|
|
buffered = conn->buf + conn->request_len;
|
|
buffered_len = conn->data_len - conn->request_len;
|
|
assert(buffered_len >= 0);
|
|
assert(conn->consumed_content == 0);
|
|
|
|
if (buffered_len > 0) {
|
|
if ((int64_t) buffered_len > conn->content_len) {
|
|
buffered_len = (int) conn->content_len;
|
|
}
|
|
push(fp, sock, ssl, buffered, (int64_t) buffered_len);
|
|
conn->consumed_content += buffered_len;
|
|
}
|
|
|
|
while (conn->consumed_content < conn->content_len) {
|
|
to_read = sizeof(buf);
|
|
if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
|
|
to_read = (int) (conn->content_len - conn->consumed_content);
|
|
}
|
|
nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
|
|
if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
|
|
break;
|
|
}
|
|
conn->consumed_content += nread;
|
|
}
|
|
|
|
if (conn->consumed_content == conn->content_len) {
|
|
success = 1;
|
|
}
|
|
|
|
// Each error code path in this function must send an error
|
|
if (!success) {
|
|
send_http_error(conn, 577, http_500_error, "");
|
|
}
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
#if !defined(NO_CGI)
|
|
// This structure helps to create an environment for the spawned CGI program.
|
|
// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
|
|
// last element must be NULL.
|
|
// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
|
|
// strings must reside in a contiguous buffer. The end of the buffer is
|
|
// marked by two '\0' characters.
|
|
// We satisfy both worlds: we create an envp array (which is vars), all
|
|
// entries are actually pointers inside buf.
|
|
struct cgi_env_block {
|
|
struct mg_connection *conn;
|
|
char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
|
|
int len; // Space taken
|
|
char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
|
|
int nvars; // Number of variables
|
|
};
|
|
|
|
// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
|
|
// pointer into the vars array.
|
|
static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
|
|
int n, space;
|
|
char *added;
|
|
va_list ap;
|
|
|
|
// Calculate how much space is left in the buffer
|
|
space = sizeof(block->buf) - block->len - 2;
|
|
assert(space >= 0);
|
|
|
|
// Make a pointer to the free space int the buffer
|
|
added = block->buf + block->len;
|
|
|
|
// Copy VARIABLE=VALUE\0 string into the free space
|
|
va_start(ap, fmt);
|
|
n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
|
|
va_end(ap);
|
|
|
|
// Make sure we do not overflow buffer and the envp array
|
|
if (n > 0 && n < space &&
|
|
block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
|
|
// Append a pointer to the added string into the envp array
|
|
block->vars[block->nvars++] = block->buf + block->len;
|
|
// Bump up used length counter. Include \0 terminator
|
|
block->len += n + 1;
|
|
}
|
|
|
|
return added;
|
|
}
|
|
|
|
static void prepare_cgi_environment(struct mg_connection *conn,
|
|
const char *prog,
|
|
struct cgi_env_block *blk) {
|
|
const char *s, *slash;
|
|
struct vec var_vec;
|
|
char *p, src_addr[20];
|
|
int i;
|
|
|
|
blk->len = blk->nvars = 0;
|
|
blk->conn = conn;
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
|
|
|
|
addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
|
|
addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
|
|
addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
|
|
|
|
// Prepare the environment block
|
|
addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
|
|
addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
|
|
addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
|
|
|
|
// TODO(lsm): fix this for IPv6 case
|
|
addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
|
|
|
|
addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
|
|
addenv(blk, "REMOTE_ADDR=%s", src_addr);
|
|
addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
|
|
addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
|
|
|
|
// SCRIPT_NAME
|
|
assert(conn->request_info.uri[0] == '/');
|
|
slash = strrchr(conn->request_info.uri, '/');
|
|
if ((s = strrchr(prog, '/')) == NULL)
|
|
s = prog;
|
|
addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
|
|
conn->request_info.uri, s);
|
|
|
|
addenv(blk, "SCRIPT_FILENAME=%s", prog);
|
|
addenv(blk, "PATH_TRANSLATED=%s", prog);
|
|
addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
|
|
|
|
if ((s = mg_get_header(conn, "Content-Type")) != NULL)
|
|
addenv(blk, "CONTENT_TYPE=%s", s);
|
|
|
|
if (conn->request_info.query_string != NULL)
|
|
addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
|
|
|
|
if ((s = mg_get_header(conn, "Content-Length")) != NULL)
|
|
addenv(blk, "CONTENT_LENGTH=%s", s);
|
|
|
|
if ((s = getenv("PATH")) != NULL)
|
|
addenv(blk, "PATH=%s", s);
|
|
|
|
if (conn->path_info != NULL) {
|
|
addenv(blk, "PATH_INFO=%s", conn->path_info);
|
|
}
|
|
|
|
#if defined(_WIN32)
|
|
if ((s = getenv("COMSPEC")) != NULL) {
|
|
addenv(blk, "COMSPEC=%s", s);
|
|
}
|
|
if ((s = getenv("SYSTEMROOT")) != NULL) {
|
|
addenv(blk, "SYSTEMROOT=%s", s);
|
|
}
|
|
if ((s = getenv("SystemDrive")) != NULL) {
|
|
addenv(blk, "SystemDrive=%s", s);
|
|
}
|
|
#else
|
|
if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
|
|
addenv(blk, "LD_LIBRARY_PATH=%s", s);
|
|
#endif // _WIN32
|
|
|
|
if ((s = getenv("PERLLIB")) != NULL)
|
|
addenv(blk, "PERLLIB=%s", s);
|
|
|
|
if (conn->request_info.remote_user != NULL) {
|
|
addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
|
|
addenv(blk, "%s", "AUTH_TYPE=Digest");
|
|
}
|
|
|
|
// Add all headers as HTTP_* variables
|
|
for (i = 0; i < conn->request_info.num_headers; i++) {
|
|
p = addenv(blk, "HTTP_%s=%s",
|
|
conn->request_info.http_headers[i].name,
|
|
conn->request_info.http_headers[i].value);
|
|
|
|
// Convert variable name into uppercase, and change - to _
|
|
for (; *p != '=' && *p != '\0'; p++) {
|
|
if (*p == '-')
|
|
*p = '_';
|
|
*p = (char) toupper(* (unsigned char *) p);
|
|
}
|
|
}
|
|
|
|
// Add user-specified variables
|
|
s = conn->ctx->config[CGI_ENVIRONMENT];
|
|
while ((s = next_option(s, &var_vec, NULL)) != NULL) {
|
|
addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
|
|
}
|
|
|
|
blk->vars[blk->nvars++] = NULL;
|
|
blk->buf[blk->len++] = '\0';
|
|
|
|
assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
|
|
assert(blk->len > 0);
|
|
assert(blk->len < (int) sizeof(blk->buf));
|
|
}
|
|
|
|
static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
|
|
int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
|
|
const char *status, *status_text;
|
|
char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
|
|
struct mg_request_info ri;
|
|
struct cgi_env_block blk;
|
|
FILE *in, *out;
|
|
pid_t pid;
|
|
|
|
prepare_cgi_environment(conn, prog, &blk);
|
|
|
|
// CGI must be executed in its own directory. 'dir' must point to the
|
|
// directory containing executable program, 'p' must point to the
|
|
// executable program name relative to 'dir'.
|
|
(void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
|
|
if ((p = strrchr(dir, DIRSEP)) != NULL) {
|
|
*p++ = '\0';
|
|
} else {
|
|
dir[0] = '.', dir[1] = '\0';
|
|
p = (char *) prog;
|
|
}
|
|
|
|
pid = (pid_t) -1;
|
|
fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
|
|
in = out = NULL;
|
|
|
|
if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"Cannot create CGI pipe: %s", strerror(ERRNO));
|
|
goto done;
|
|
} else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
|
|
fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
|
|
goto done;
|
|
} else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
|
|
(out = fdopen(fd_stdout[0], "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen: %s", strerror(ERRNO));
|
|
goto done;
|
|
}
|
|
|
|
setbuf(in, NULL);
|
|
setbuf(out, NULL);
|
|
|
|
// spawn_process() must close those!
|
|
// If we don't mark them as closed, close() attempt before
|
|
// return from this function throws an exception on Windows.
|
|
// Windows does not like when closed descriptor is closed again.
|
|
fd_stdin[0] = fd_stdout[1] = -1;
|
|
|
|
// Send POST data to the CGI process if needed
|
|
if (!strcmp(conn->request_info.request_method, "POST") &&
|
|
!forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
|
|
goto done;
|
|
}
|
|
|
|
// Now read CGI reply into a buffer. We need to set correct
|
|
// status code, thus we need to see all HTTP headers first.
|
|
// Do not send anything back to client, until we buffer in all
|
|
// HTTP headers.
|
|
data_len = 0;
|
|
headers_len = read_request(out, INVALID_SOCKET, NULL,
|
|
buf, sizeof(buf), &data_len);
|
|
if (headers_len <= 0) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"CGI program sent malformed HTTP headers: [%.*s]",
|
|
data_len, buf);
|
|
goto done;
|
|
}
|
|
pbuf = buf;
|
|
buf[headers_len - 1] = '\0';
|
|
parse_http_headers(&pbuf, &ri);
|
|
|
|
// Make up and send the status line
|
|
status_text = "OK";
|
|
if ((status = get_header(&ri, "Status")) != NULL) {
|
|
conn->request_info.status_code = atoi(status);
|
|
status_text = status;
|
|
while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
|
|
status_text++;
|
|
}
|
|
} else if (get_header(&ri, "Location") != NULL) {
|
|
conn->request_info.status_code = 302;
|
|
} else {
|
|
conn->request_info.status_code = 200;
|
|
}
|
|
if (get_header(&ri, "Connection") != NULL &&
|
|
!mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
|
|
conn->must_close = 1;
|
|
}
|
|
(void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code,
|
|
status_text);
|
|
|
|
// Send headers
|
|
for (i = 0; i < ri.num_headers; i++) {
|
|
mg_printf(conn, "%s: %s\r\n",
|
|
ri.http_headers[i].name, ri.http_headers[i].value);
|
|
}
|
|
(void) mg_write(conn, "\r\n", 2);
|
|
|
|
// Send chunk of data that may be read after the headers
|
|
conn->num_bytes_sent += mg_write(conn, buf + headers_len,
|
|
(size_t)(data_len - headers_len));
|
|
|
|
// Read the rest of CGI output and send to the client
|
|
send_file_data(conn, out, INT64_MAX);
|
|
|
|
done:
|
|
if (pid != (pid_t) -1) {
|
|
kill(pid, SIGKILL);
|
|
}
|
|
if (fd_stdin[0] != -1) {
|
|
(void) close(fd_stdin[0]);
|
|
}
|
|
if (fd_stdout[1] != -1) {
|
|
(void) close(fd_stdout[1]);
|
|
}
|
|
|
|
if (in != NULL) {
|
|
(void) fclose(in);
|
|
} else if (fd_stdin[1] != -1) {
|
|
(void) close(fd_stdin[1]);
|
|
}
|
|
|
|
if (out != NULL) {
|
|
(void) fclose(out);
|
|
} else if (fd_stdout[0] != -1) {
|
|
(void) close(fd_stdout[0]);
|
|
}
|
|
}
|
|
#endif // !NO_CGI
|
|
|
|
// For a given PUT path, create all intermediate subdirectories
|
|
// for given path. Return 0 if the path itself is a directory,
|
|
// or -1 on error, 1 if OK.
|
|
static int put_dir(const char *path) {
|
|
char buf[PATH_MAX];
|
|
const char *s, *p;
|
|
struct mgstat st;
|
|
int len, res = 1;
|
|
|
|
for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
|
|
len = p - path;
|
|
if (len >= (int) sizeof(buf)) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
memcpy(buf, path, len);
|
|
buf[len] = '\0';
|
|
|
|
// Try to create intermediate directory
|
|
DEBUG_TRACE(("mkdir(%s)", buf));
|
|
if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
|
|
// Is path itself a directory?
|
|
if (p[1] == '\0') {
|
|
res = 0;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void put_file(struct mg_connection *conn, const char *path) {
|
|
struct mgstat st;
|
|
const char *range;
|
|
int64_t r1, r2;
|
|
FILE *fp;
|
|
int rc;
|
|
|
|
conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
|
|
|
|
if ((rc = put_dir(path)) == 0) {
|
|
mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
|
|
} else if (rc == -1) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"put_dir(%s): %s", path, strerror(ERRNO));
|
|
} else if ((fp = mg_fopen(path, "wb+")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error,
|
|
"fopen(%s): %s", path, strerror(ERRNO));
|
|
} else {
|
|
set_close_on_exec(fileno(fp));
|
|
range = mg_get_header(conn, "Content-Range");
|
|
r1 = r2 = 0;
|
|
if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
|
|
conn->request_info.status_code = 206;
|
|
// TODO(lsm): handle seek error
|
|
(void) fseeko(fp, (off_t) r1, SEEK_SET);
|
|
}
|
|
if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
|
|
(void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
|
|
conn->request_info.status_code);
|
|
(void) fclose(fp);
|
|
}
|
|
}
|
|
|
|
static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
|
|
|
|
static void do_ssi_include(struct mg_connection *conn, const char *ssi,
|
|
char *tag, int include_level) {
|
|
char file_name[BUFSIZ], path[PATH_MAX], *p;
|
|
FILE *fp;
|
|
|
|
// sscanf() is safe here, since send_ssi_file() also uses buffer
|
|
// of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
|
|
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the webserver root
|
|
(void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
|
|
conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name);
|
|
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the webserver working directory
|
|
// or it is absolute system path
|
|
(void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
|
|
} else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
|
|
// File name is relative to the currect document
|
|
(void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
|
|
if ((p = strrchr(path, DIRSEP)) != NULL) {
|
|
p[1] = '\0';
|
|
}
|
|
(void) mg_snprintf(conn, path + strlen(path),
|
|
sizeof(path) - strlen(path), "%s", file_name);
|
|
} else {
|
|
cry(conn, "Bad SSI #include: [%s]", tag);
|
|
return;
|
|
}
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
|
|
tag, path, strerror(ERRNO));
|
|
} else {
|
|
set_close_on_exec(fileno(fp));
|
|
if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
|
|
strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
|
|
send_ssi_file(conn, path, fp, include_level + 1);
|
|
} else {
|
|
send_file_data(conn, fp, INT64_MAX);
|
|
}
|
|
(void) fclose(fp);
|
|
}
|
|
}
|
|
|
|
#if !defined(NO_POPEN)
|
|
static void do_ssi_exec(struct mg_connection *conn, char *tag) {
|
|
char cmd[BUFSIZ];
|
|
FILE *fp;
|
|
|
|
if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
|
|
cry(conn, "Bad SSI #exec: [%s]", tag);
|
|
} else if ((fp = popen(cmd, "r")) == NULL) {
|
|
cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
|
|
} else {
|
|
send_file_data(conn, fp, INT64_MAX);
|
|
(void) pclose(fp);
|
|
}
|
|
}
|
|
#endif // !NO_POPEN
|
|
|
|
static void send_ssi_file(struct mg_connection *conn, const char *path,
|
|
FILE *fp, int include_level) {
|
|
char buf[BUFSIZ];
|
|
int ch, len, in_ssi_tag;
|
|
|
|
if (include_level > 10) {
|
|
cry(conn, "SSI #include level is too deep (%s)", path);
|
|
return;
|
|
}
|
|
|
|
in_ssi_tag = 0;
|
|
len = 0;
|
|
|
|
while ((ch = fgetc(fp)) != EOF) {
|
|
if (in_ssi_tag && ch == '>') {
|
|
in_ssi_tag = 0;
|
|
buf[len++] = (char) ch;
|
|
buf[len] = '\0';
|
|
assert(len <= (int) sizeof(buf));
|
|
if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
|
|
// Not an SSI tag, pass it
|
|
(void) mg_write(conn, buf, (size_t)len);
|
|
} else {
|
|
if (!memcmp(buf + 5, "include", 7)) {
|
|
do_ssi_include(conn, path, buf + 12, include_level);
|
|
#if !defined(NO_POPEN)
|
|
} else if (!memcmp(buf + 5, "exec", 4)) {
|
|
do_ssi_exec(conn, buf + 9);
|
|
#endif // !NO_POPEN
|
|
} else {
|
|
cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
|
|
}
|
|
}
|
|
len = 0;
|
|
} else if (in_ssi_tag) {
|
|
if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
|
|
// Not an SSI tag
|
|
in_ssi_tag = 0;
|
|
} else if (len == (int) sizeof(buf) - 2) {
|
|
cry(conn, "%s: SSI tag is too large", path);
|
|
len = 0;
|
|
}
|
|
buf[len++] = ch & 0xff;
|
|
} else if (ch == '<') {
|
|
in_ssi_tag = 1;
|
|
if (len > 0) {
|
|
(void) mg_write(conn, buf, (size_t)len);
|
|
}
|
|
len = 0;
|
|
buf[len++] = ch & 0xff;
|
|
} else {
|
|
buf[len++] = ch & 0xff;
|
|
if (len == (int) sizeof(buf)) {
|
|
(void) mg_write(conn, buf, (size_t)len);
|
|
len = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Send the rest of buffered data
|
|
if (len > 0) {
|
|
(void) mg_write(conn, buf, (size_t)len);
|
|
}
|
|
}
|
|
|
|
static void handle_ssi_file_request(struct mg_connection *conn,
|
|
const char *path) {
|
|
FILE *fp;
|
|
|
|
if ((fp = mg_fopen(path, "rb")) == NULL) {
|
|
send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
|
|
strerror(ERRNO));
|
|
} else {
|
|
conn->must_close = 1;
|
|
set_close_on_exec(fileno(fp));
|
|
mg_printf(conn, "HTTP/1.1 200 OK\r\n"
|
|
"Content-Type: text/html\r\nConnection: %s\r\n\r\n",
|
|
suggest_connection_header(conn));
|
|
send_ssi_file(conn, path, fp, 0);
|
|
(void) fclose(fp);
|
|
}
|
|
}
|
|
|
|
static void send_options(struct mg_connection *conn) {
|
|
conn->request_info.status_code = 200;
|
|
|
|
(void) mg_printf(conn,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
|
|
"DAV: 1\r\n\r\n");
|
|
}
|
|
|
|
// Writes PROPFIND properties for a collection element
|
|
static void print_props(struct mg_connection *conn, const char* uri,
|
|
struct mgstat* st) {
|
|
char mtime[64];
|
|
gmt_time_string(mtime, sizeof(mtime), &st->mtime);
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<d:response>"
|
|
"<d:href>%s</d:href>"
|
|
"<d:propstat>"
|
|
"<d:prop>"
|
|
"<d:resourcetype>%s</d:resourcetype>"
|
|
"<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
|
|
"<d:getlastmodified>%s</d:getlastmodified>"
|
|
"</d:prop>"
|
|
"<d:status>HTTP/1.1 200 OK</d:status>"
|
|
"</d:propstat>"
|
|
"</d:response>\n",
|
|
uri,
|
|
st->is_directory ? "<d:collection/>" : "",
|
|
st->size,
|
|
mtime);
|
|
}
|
|
|
|
static void print_dav_dir_entry(struct de *de, void *data) {
|
|
char href[PATH_MAX];
|
|
struct mg_connection *conn = (struct mg_connection *) data;
|
|
mg_snprintf(conn, href, sizeof(href), "%s%s",
|
|
conn->request_info.uri, de->file_name);
|
|
print_props(conn, href, &de->st);
|
|
}
|
|
|
|
static void handle_propfind(struct mg_connection *conn, const char* path,
|
|
struct mgstat* st) {
|
|
const char *depth = mg_get_header(conn, "Depth");
|
|
|
|
conn->must_close = 1;
|
|
conn->request_info.status_code = 207;
|
|
mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
|
|
"Connection: close\r\n"
|
|
"Content-Type: text/xml; charset=utf-8\r\n\r\n");
|
|
|
|
conn->num_bytes_sent += mg_printf(conn,
|
|
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
|
|
"<d:multistatus xmlns:d='DAV:'>\n");
|
|
|
|
// Print properties for the requested resource itself
|
|
print_props(conn, conn->request_info.uri, st);
|
|
|
|
// If it is a directory, print directory entries too if Depth is not 0
|
|
if (st->is_directory &&
|
|
!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
|
|
(depth == NULL || strcmp(depth, "0") != 0)) {
|
|
scan_directory(conn, path, conn, &print_dav_dir_entry);
|
|
}
|
|
|
|
conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
|
|
}
|
|
|
|
// This is the heart of the Mongoose's logic.
|
|
// This function is called when the request is read, parsed and validated,
|
|
// and Mongoose must decide what action to take: serve a file, or
|
|
// a directory, or call embedded function, etcetera.
|
|
static void handle_request(struct mg_connection *conn) {
|
|
struct mg_request_info *ri = &conn->request_info;
|
|
char path[PATH_MAX];
|
|
int stat_result, uri_len;
|
|
struct mgstat st;
|
|
|
|
if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
|
|
* conn->request_info.query_string++ = '\0';
|
|
}
|
|
uri_len = strlen(ri->uri);
|
|
url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
|
|
remove_double_dots_and_double_slashes(ri->uri);
|
|
stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st);
|
|
|
|
DEBUG_TRACE(("%s", ri->uri));
|
|
if (!check_authorization(conn, path)) {
|
|
send_authorization_request(conn);
|
|
} else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
|
|
// Do nothing, callback has served the request
|
|
} else if (!strcmp(ri->request_method, "OPTIONS")) {
|
|
send_options(conn);
|
|
} else if (strstr(path, PASSWORDS_FILE_NAME)) {
|
|
// Do not allow to view passwords files
|
|
send_http_error(conn, 403, "Forbidden", "Access Forbidden");
|
|
} else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
|
|
send_http_error(conn, 404, "Not Found", "Not Found");
|
|
} else if ((!strcmp(ri->request_method, "PUT") ||
|
|
!strcmp(ri->request_method, "DELETE")) &&
|
|
(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
|
|
!is_authorized_for_put(conn))) {
|
|
send_authorization_request(conn);
|
|
} else if (!strcmp(ri->request_method, "PUT")) {
|
|
put_file(conn, path);
|
|
} else if (!strcmp(ri->request_method, "DELETE")) {
|
|
if (mg_remove(path) == 0) {
|
|
send_http_error(conn, 200, "OK", "");
|
|
} else {
|
|
send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
|
|
strerror(ERRNO));
|
|
}
|
|
} else if (stat_result != 0) {
|
|
send_http_error(conn, 404, "Not Found", "%s", "File not found");
|
|
} else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
|
|
(void) mg_printf(conn,
|
|
"HTTP/1.1 301 Moved Permanently\r\n"
|
|
"Location: %s/\r\n\r\n", ri->uri);
|
|
} else if (!strcmp(ri->request_method, "PROPFIND")) {
|
|
handle_propfind(conn, path, &st);
|
|
} else if (st.is_directory &&
|
|
!substitute_index_file(conn, path, sizeof(path), &st)) {
|
|
if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
|
|
handle_directory_request(conn, path);
|
|
} else {
|
|
send_http_error(conn, 403, "Directory Listing Denied",
|
|
"Directory listing denied");
|
|
}
|
|
#if !defined(NO_CGI)
|
|
} else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
|
|
strlen(conn->ctx->config[CGI_EXTENSIONS]),
|
|
path) > 0) {
|
|
if (strcmp(ri->request_method, "POST") &&
|
|
strcmp(ri->request_method, "GET")) {
|
|
send_http_error(conn, 501, "Not Implemented",
|
|
"Method %s is not implemented", ri->request_method);
|
|
} else {
|
|
handle_cgi_request(conn, path);
|
|
}
|
|
#endif // !NO_CGI
|
|
} else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
|
|
strlen(conn->ctx->config[SSI_EXTENSIONS]),
|
|
path) > 0) {
|
|
handle_ssi_file_request(conn, path);
|
|
} else if (is_not_modified(conn, &st)) {
|
|
send_http_error(conn, 304, "Not Modified", "");
|
|
} else {
|
|
handle_file_request(conn, path, &st);
|
|
}
|
|
}
|
|
|
|
static void close_all_listening_sockets(struct mg_context *ctx) {
|
|
struct socket *sp, *tmp;
|
|
for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
|
|
tmp = sp->next;
|
|
(void) closesocket(sp->sock);
|
|
free(sp);
|
|
}
|
|
}
|
|
|
|
// Valid listening port specification is: [ip_address:]port[s]
|
|
// Examples: 80, 443s, 127.0.0.1:3128,1.2.3.4:8080s
|
|
// TODO(lsm): add parsing of the IPv6 address
|
|
static int parse_port_string(const struct vec *vec, struct socket *so) {
|
|
int a, b, c, d, port, len;
|
|
|
|
// MacOS needs that. If we do not zero it, subsequent bind() will fail.
|
|
// Also, all-zeroes in the socket address means binding to all addresses
|
|
// for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
|
|
memset(so, 0, sizeof(*so));
|
|
|
|
if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
|
|
// Bind to a specific IPv4 address
|
|
so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
|
|
} else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 ||
|
|
len <= 0 ||
|
|
len > (int) vec->len ||
|
|
(vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) {
|
|
return 0;
|
|
}
|
|
|
|
so->is_ssl = vec->ptr[len] == 's';
|
|
#if defined(USE_IPV6)
|
|
so->lsa.sin6.sin6_family = AF_INET6;
|
|
so->lsa.sin6.sin6_port = htons((uint16_t) port);
|
|
#else
|
|
so->lsa.sin.sin_family = AF_INET;
|
|
so->lsa.sin.sin_port = htons((uint16_t) port);
|
|
#endif
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int set_ports_option(struct mg_context *ctx) {
|
|
const char *list = ctx->config[LISTENING_PORTS];
|
|
int on = 1, success = 1;
|
|
SOCKET sock;
|
|
struct vec vec;
|
|
struct socket so, *listener;
|
|
|
|
while (success && (list = next_option(list, &vec, NULL)) != NULL) {
|
|
if (!parse_port_string(&vec, &so)) {
|
|
cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
|
|
__func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
|
|
success = 0;
|
|
} else if (so.is_ssl && ctx->ssl_ctx == NULL) {
|
|
cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
|
|
success = 0;
|
|
} else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
|
|
INVALID_SOCKET ||
|
|
#if !defined(_WIN32)
|
|
// On Windows, SO_REUSEADDR is recommended only for
|
|
// broadcast UDP sockets
|
|
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
|
|
sizeof(on)) != 0 ||
|
|
#endif // !_WIN32
|
|
// Set TCP keep-alive. This is needed because if HTTP-level
|
|
// keep-alive is enabled, and client resets the connection,
|
|
// server won't get TCP FIN or RST and will keep the connection
|
|
// open forever. With TCP keep-alive, next keep-alive
|
|
// handshake will figure out that the client is down and
|
|
// will close the server end.
|
|
// Thanks to Igor Klopov who suggested the patch.
|
|
setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
|
|
sizeof(on)) != 0 ||
|
|
bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 ||
|
|
listen(sock, 100) != 0) {
|
|
closesocket(sock);
|
|
cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
|
|
vec.len, vec.ptr, strerror(ERRNO));
|
|
success = 0;
|
|
} else if ((listener = (struct socket *)
|
|
calloc(1, sizeof(*listener))) == NULL) {
|
|
closesocket(sock);
|
|
cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
|
|
success = 0;
|
|
} else {
|
|
*listener = so;
|
|
listener->sock = sock;
|
|
set_close_on_exec(listener->sock);
|
|
listener->next = ctx->listening_sockets;
|
|
ctx->listening_sockets = listener;
|
|
}
|
|
}
|
|
|
|
if (!success) {
|
|
close_all_listening_sockets(ctx);
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
static void log_header(const struct mg_connection *conn, const char *header,
|
|
FILE *fp) {
|
|
const char *header_value;
|
|
|
|
if ((header_value = mg_get_header(conn, header)) == NULL) {
|
|
(void) fprintf(fp, "%s", " -");
|
|
} else {
|
|
(void) fprintf(fp, " \"%s\"", header_value);
|
|
}
|
|
}
|
|
|
|
static void log_access(const struct mg_connection *conn) {
|
|
const struct mg_request_info *ri;
|
|
FILE *fp;
|
|
char date[64], src_addr[20];
|
|
|
|
fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
|
|
mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
|
|
|
|
if (fp == NULL)
|
|
return;
|
|
|
|
strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
|
|
localtime(&conn->birth_time));
|
|
|
|
ri = &conn->request_info;
|
|
flockfile(fp);
|
|
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
|
|
fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
|
|
src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
|
|
ri->request_method ? ri->request_method : "-",
|
|
ri->uri ? ri->uri : "-", ri->http_version,
|
|
conn->request_info.status_code, conn->num_bytes_sent);
|
|
log_header(conn, "Referer", fp);
|
|
log_header(conn, "User-Agent", fp);
|
|
fputc('\n', fp);
|
|
fflush(fp);
|
|
|
|
funlockfile(fp);
|
|
fclose(fp);
|
|
}
|
|
|
|
static int isbyte(int n) {
|
|
return n >= 0 && n <= 255;
|
|
}
|
|
|
|
// Verify given socket address against the ACL.
|
|
// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
|
|
static int check_acl(struct mg_context *ctx, const union usa *usa) {
|
|
int a, b, c, d, n, mask, allowed;
|
|
char flag;
|
|
uint32_t acl_subnet, acl_mask, remote_ip;
|
|
struct vec vec;
|
|
const char *list = ctx->config[ACCESS_CONTROL_LIST];
|
|
|
|
if (list == NULL) {
|
|
return 1;
|
|
}
|
|
|
|
(void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip));
|
|
|
|
// If any ACL is set, deny by default
|
|
allowed = '-';
|
|
|
|
while ((list = next_option(list, &vec, NULL)) != NULL) {
|
|
mask = 32;
|
|
|
|
if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
|
|
cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
|
|
return -1;
|
|
} else if (flag != '+' && flag != '-') {
|
|
cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
|
|
return -1;
|
|
} else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
|
|
cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
|
|
return -1;
|
|
} else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
|
|
// Do nothing, no mask specified
|
|
} else if (mask < 0 || mask > 32) {
|
|
cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
|
|
return -1;
|
|
}
|
|
|
|
acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
|
|
acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
|
|
|
|
if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
|
|
allowed = flag;
|
|
}
|
|
}
|
|
|
|
return allowed == '+';
|
|
}
|
|
|
|
static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
|
|
FD_SET(fd, set);
|
|
if (fd > (SOCKET) *max_fd) {
|
|
*max_fd = (int) fd;
|
|
}
|
|
}
|
|
|
|
#if !defined(_WIN32)
|
|
static int set_uid_option(struct mg_context *ctx) {
|
|
struct passwd *pw;
|
|
const char *uid = ctx->config[RUN_AS_USER];
|
|
int success = 0;
|
|
|
|
if (uid == NULL) {
|
|
success = 1;
|
|
} else {
|
|
if ((pw = getpwnam(uid)) == NULL) {
|
|
cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
|
|
} else if (setgid(pw->pw_gid) == -1) {
|
|
cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
|
|
} else if (setuid(pw->pw_uid) == -1) {
|
|
cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
|
|
} else {
|
|
success = 1;
|
|
}
|
|
}
|
|
|
|
return success;
|
|
}
|
|
#endif // !_WIN32
|
|
|
|
#if !defined(NO_SSL)
|
|
static pthread_mutex_t *ssl_mutexes;
|
|
|
|
static void ssl_locking_callback(int mode, int mutex_num, const char *file,
|
|
int line) {
|
|
line = 0; // Unused
|
|
file = NULL; // Unused
|
|
|
|
if (mode & CRYPTO_LOCK) {
|
|
(void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
|
|
} else {
|
|
(void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
|
|
}
|
|
}
|
|
|
|
static unsigned long ssl_id_callback(void) {
|
|
return (unsigned long) pthread_self();
|
|
}
|
|
|
|
#if !defined(NO_SSL_DL)
|
|
static int load_dll(struct mg_context *ctx, const char *dll_name,
|
|
struct ssl_func *sw) {
|
|
union {void *p; void (*fp)(void);} u;
|
|
void *dll_handle;
|
|
struct ssl_func *fp;
|
|
|
|
if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
|
|
cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
|
|
return 0;
|
|
}
|
|
|
|
for (fp = sw; fp->name != NULL; fp++) {
|
|
#ifdef _WIN32
|
|
// GetProcAddress() returns pointer to function
|
|
u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
|
|
#else
|
|
// dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
|
|
// function pointers. We need to use a union to make a cast.
|
|
u.p = dlsym(dll_handle, fp->name);
|
|
#endif // _WIN32
|
|
if (u.fp == NULL) {
|
|
cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
|
|
return 0;
|
|
} else {
|
|
fp->ptr = u.fp;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
#endif // NO_SSL_DL
|
|
|
|
// Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
|
|
static int set_ssl_option(struct mg_context *ctx) {
|
|
struct mg_request_info request_info;
|
|
SSL_CTX *CTX;
|
|
int i, size;
|
|
const char *pem = ctx->config[SSL_CERTIFICATE];
|
|
const char *chain = ctx->config[SSL_CHAIN_FILE];
|
|
|
|
if (pem == NULL) {
|
|
return 1;
|
|
}
|
|
|
|
#if !defined(NO_SSL_DL)
|
|
if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
|
|
!load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
|
|
return 0;
|
|
}
|
|
#endif // NO_SSL_DL
|
|
|
|
// Initialize SSL crap
|
|
SSL_library_init();
|
|
SSL_load_error_strings();
|
|
|
|
if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
|
|
cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
|
|
} else if (ctx->user_callback != NULL) {
|
|
memset(&request_info, 0, sizeof(request_info));
|
|
request_info.user_data = ctx->user_data;
|
|
ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX,
|
|
&request_info);
|
|
}
|
|
|
|
if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
|
|
SSL_FILETYPE_PEM) == 0) {
|
|
cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
|
|
return 0;
|
|
} else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
|
|
SSL_FILETYPE_PEM) == 0) {
|
|
cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
|
|
return 0;
|
|
}
|
|
|
|
if (CTX != NULL && chain != NULL &&
|
|
SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
|
|
cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
|
|
return 0;
|
|
}
|
|
|
|
// Initialize locking callbacks, needed for thread safety.
|
|
// http://www.openssl.org/support/faq.html#PROG1
|
|
size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
|
|
if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
|
|
cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < CRYPTO_num_locks(); i++) {
|
|
pthread_mutex_init(&ssl_mutexes[i], NULL);
|
|
}
|
|
|
|
CRYPTO_set_locking_callback(&ssl_locking_callback);
|
|
CRYPTO_set_id_callback(&ssl_id_callback);
|
|
|
|
// Done with everything. Save the context.
|
|
ctx->ssl_ctx = CTX;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void uninitialize_ssl(struct mg_context *ctx) {
|
|
int i;
|
|
if (ctx->ssl_ctx != NULL) {
|
|
CRYPTO_set_locking_callback(NULL);
|
|
for (i = 0; i < CRYPTO_num_locks(); i++) {
|
|
pthread_mutex_destroy(&ssl_mutexes[i]);
|
|
}
|
|
CRYPTO_set_locking_callback(NULL);
|
|
CRYPTO_set_id_callback(NULL);
|
|
}
|
|
}
|
|
#endif // !NO_SSL
|
|
|
|
static int set_gpass_option(struct mg_context *ctx) {
|
|
struct mgstat mgstat;
|
|
const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
|
|
return path == NULL || mg_stat(path, &mgstat) == 0;
|
|
}
|
|
|
|
static int set_acl_option(struct mg_context *ctx) {
|
|
union usa fake;
|
|
return check_acl(ctx, &fake) != -1;
|
|
}
|
|
|
|
static void reset_per_request_attributes(struct mg_connection *conn) {
|
|
struct mg_request_info *ri = &conn->request_info;
|
|
|
|
// Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
|
|
ri->remote_user = ri->request_method = ri->uri = ri->http_version =
|
|
conn->path_info = NULL;
|
|
ri->num_headers = 0;
|
|
ri->status_code = -1;
|
|
|
|
conn->num_bytes_sent = conn->consumed_content = 0;
|
|
conn->content_len = -1;
|
|
conn->request_len = conn->data_len = 0;
|
|
conn->must_close = 0;
|
|
}
|
|
|
|
static void close_socket_gracefully(SOCKET sock) {
|
|
char buf[BUFSIZ];
|
|
struct linger linger;
|
|
int n;
|
|
|
|
// Set linger option to avoid socket hanging out after close. This prevent
|
|
// ephemeral port exhaust problem under high QPS.
|
|
linger.l_onoff = 1;
|
|
linger.l_linger = 1;
|
|
setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger));
|
|
|
|
// Send FIN to the client
|
|
(void) shutdown(sock, SHUT_WR);
|
|
set_non_blocking_mode(sock);
|
|
|
|
// Read and discard pending data. If we do not do that and close the
|
|
// socket, the data in the send buffer may be discarded. This
|
|
// behaviour is seen on Windows, when client keeps sending data
|
|
// when server decide to close the connection; then when client
|
|
// does recv() it gets no data back.
|
|
do {
|
|
n = pull(NULL, sock, NULL, buf, sizeof(buf));
|
|
} while (n > 0);
|
|
|
|
// Now we know that our FIN is ACK-ed, safe to close
|
|
(void) closesocket(sock);
|
|
}
|
|
|
|
static void close_connection(struct mg_connection *conn) {
|
|
if (conn->ssl) {
|
|
SSL_free(conn->ssl);
|
|
conn->ssl = NULL;
|
|
}
|
|
|
|
if (conn->client.sock != INVALID_SOCKET) {
|
|
close_socket_gracefully(conn->client.sock);
|
|
}
|
|
}
|
|
|
|
static void discard_current_request_from_buffer(struct mg_connection *conn) {
|
|
char *buffered;
|
|
int buffered_len, body_len;
|
|
|
|
buffered = conn->buf + conn->request_len;
|
|
buffered_len = conn->data_len - conn->request_len;
|
|
assert(buffered_len >= 0);
|
|
|
|
if (conn->content_len <= 0) {
|
|
// Protect from negative Content-Length, too
|
|
body_len = 0;
|
|
} else if (conn->content_len < (int64_t) buffered_len) {
|
|
body_len = (int) conn->content_len;
|
|
} else {
|
|
body_len = buffered_len;
|
|
}
|
|
|
|
conn->data_len -= conn->request_len + body_len;
|
|
memmove(conn->buf, conn->buf + conn->request_len + body_len,
|
|
(size_t) conn->data_len);
|
|
}
|
|
|
|
static int is_valid_uri(const char *uri) {
|
|
// Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
|
|
// URI can be an asterisk (*) or should start with slash.
|
|
return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
|
|
}
|
|
|
|
static void process_new_connection(struct mg_connection *conn) {
|
|
struct mg_request_info *ri = &conn->request_info;
|
|
int keep_alive_enabled;
|
|
const char *cl;
|
|
|
|
keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
|
|
|
|
do {
|
|
reset_per_request_attributes(conn);
|
|
|
|
// If next request is not pipelined, read it in
|
|
if ((conn->request_len = get_request_len(conn->buf, conn->data_len)) == 0) {
|
|
conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
|
|
conn->buf, conn->buf_size, &conn->data_len);
|
|
}
|
|
assert(conn->data_len >= conn->request_len);
|
|
if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
|
|
send_http_error(conn, 413, "Request Too Large", "");
|
|
return;
|
|
} if (conn->request_len <= 0) {
|
|
return; // Remote end closed the connection
|
|
}
|
|
|
|
// Nul-terminate the request cause parse_http_request() uses sscanf
|
|
conn->buf[conn->request_len - 1] = '\0';
|
|
if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) {
|
|
// Do not put garbage in the access log, just send it back to the client
|
|
send_http_error(conn, 400, "Bad Request",
|
|
"Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
|
|
} else if (strcmp(ri->http_version, "1.0") &&
|
|
strcmp(ri->http_version, "1.1")) {
|
|
// Request seems valid, but HTTP version is strange
|
|
send_http_error(conn, 505, "HTTP version not supported", "");
|
|
log_access(conn);
|
|
} else {
|
|
// Request is valid, handle it
|
|
cl = get_header(ri, "Content-Length");
|
|
conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
|
|
conn->birth_time = time(NULL);
|
|
handle_request(conn);
|
|
call_user(conn, MG_REQUEST_COMPLETE);
|
|
log_access(conn);
|
|
discard_current_request_from_buffer(conn);
|
|
}
|
|
if (ri->remote_user != NULL) {
|
|
free((void *) ri->remote_user);
|
|
}
|
|
} while (conn->ctx->stop_flag == 0 &&
|
|
keep_alive_enabled &&
|
|
should_keep_alive(conn));
|
|
}
|
|
|
|
// Worker threads take accepted socket from the queue
|
|
static int consume_socket(struct mg_context *ctx, struct socket *sp) {
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
DEBUG_TRACE(("going idle"));
|
|
|
|
// If the queue is empty, wait. We're idle at this point.
|
|
while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
|
|
pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
|
|
}
|
|
|
|
// If we're stopping, sq_head may be equal to sq_tail.
|
|
if (ctx->sq_head > ctx->sq_tail) {
|
|
// Copy socket from the queue and increment tail
|
|
*sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
|
|
ctx->sq_tail++;
|
|
DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
|
|
|
|
// Wrap pointers if needed
|
|
while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
|
|
ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
|
|
ctx->sq_head -= ARRAY_SIZE(ctx->queue);
|
|
}
|
|
}
|
|
|
|
(void) pthread_cond_signal(&ctx->sq_empty);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
return !ctx->stop_flag;
|
|
}
|
|
|
|
static void worker_thread(struct mg_context *ctx) {
|
|
struct mg_connection *conn;
|
|
int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
|
|
|
|
conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size);
|
|
if (conn == NULL) {
|
|
cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
|
|
return;
|
|
}
|
|
conn->buf_size = buf_size;
|
|
conn->buf = (char *) (conn + 1);
|
|
|
|
// Call consume_socket() even when ctx->stop_flag > 0, to let it signal
|
|
// sq_empty condvar to wake up the master waiting in produce_socket()
|
|
while (consume_socket(ctx, &conn->client)) {
|
|
conn->birth_time = time(NULL);
|
|
conn->ctx = ctx;
|
|
|
|
// Fill in IP, port info early so even if SSL setup below fails,
|
|
// error handler would have the corresponding info.
|
|
// Thanks to Johannes Winkelmann for the patch.
|
|
// TODO(lsm): Fix IPv6 case
|
|
conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
|
|
memcpy(&conn->request_info.remote_ip,
|
|
&conn->client.rsa.sin.sin_addr.s_addr, 4);
|
|
conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
|
|
conn->request_info.is_ssl = conn->client.is_ssl;
|
|
|
|
if (!conn->client.is_ssl ||
|
|
(conn->client.is_ssl && sslize(conn, SSL_accept))) {
|
|
process_new_connection(conn);
|
|
}
|
|
|
|
close_connection(conn);
|
|
}
|
|
free(conn);
|
|
|
|
// Signal master that we're done with connection and exiting
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
ctx->num_threads--;
|
|
(void) pthread_cond_signal(&ctx->cond);
|
|
assert(ctx->num_threads >= 0);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
DEBUG_TRACE(("exiting"));
|
|
}
|
|
|
|
// Master thread adds accepted socket to a queue
|
|
static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
|
|
// If the queue is full, wait
|
|
while (ctx->stop_flag == 0 &&
|
|
ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
|
|
(void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
|
|
}
|
|
|
|
if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
|
|
// Copy socket to the queue and increment head
|
|
ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
|
|
ctx->sq_head++;
|
|
DEBUG_TRACE(("queued socket %d", sp->sock));
|
|
}
|
|
|
|
(void) pthread_cond_signal(&ctx->sq_full);
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
}
|
|
|
|
static void accept_new_connection(const struct socket *listener,
|
|
struct mg_context *ctx) {
|
|
struct socket accepted;
|
|
char src_addr[20];
|
|
socklen_t len;
|
|
int allowed;
|
|
|
|
len = sizeof(accepted.rsa);
|
|
accepted.lsa = listener->lsa;
|
|
accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len);
|
|
if (accepted.sock != INVALID_SOCKET) {
|
|
allowed = check_acl(ctx, &accepted.rsa);
|
|
if (allowed) {
|
|
// Put accepted socket structure into the queue
|
|
DEBUG_TRACE(("accepted socket %d", accepted.sock));
|
|
accepted.is_ssl = listener->is_ssl;
|
|
produce_socket(ctx, &accepted);
|
|
} else {
|
|
sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa);
|
|
cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
|
|
(void) closesocket(accepted.sock);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void master_thread(struct mg_context *ctx) {
|
|
fd_set read_set;
|
|
struct timeval tv;
|
|
struct socket *sp;
|
|
int max_fd;
|
|
|
|
// Increase priority of the master thread
|
|
#if defined(_WIN32)
|
|
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
|
|
#endif
|
|
|
|
#if defined(ISSUE_317)
|
|
struct sched_param sched_param;
|
|
sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
|
|
pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
|
|
#endif
|
|
|
|
while (ctx->stop_flag == 0) {
|
|
FD_ZERO(&read_set);
|
|
max_fd = -1;
|
|
|
|
// Add listening sockets to the read set
|
|
for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
|
|
add_to_set(sp->sock, &read_set, &max_fd);
|
|
}
|
|
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 200 * 1000;
|
|
|
|
if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
|
|
#ifdef _WIN32
|
|
// On windows, if read_set and write_set are empty,
|
|
// select() returns "Invalid parameter" error
|
|
// (at least on my Windows XP Pro). So in this case, we sleep here.
|
|
mg_sleep(1000);
|
|
#endif // _WIN32
|
|
} else {
|
|
for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
|
|
if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
|
|
accept_new_connection(sp, ctx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
DEBUG_TRACE(("stopping workers"));
|
|
|
|
// Stop signal received: somebody called mg_stop. Quit.
|
|
close_all_listening_sockets(ctx);
|
|
|
|
// Wakeup workers that are waiting for connections to handle.
|
|
pthread_cond_broadcast(&ctx->sq_full);
|
|
|
|
// Wait until all threads finish
|
|
(void) pthread_mutex_lock(&ctx->mutex);
|
|
while (ctx->num_threads > 0) {
|
|
(void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
|
|
}
|
|
(void) pthread_mutex_unlock(&ctx->mutex);
|
|
|
|
// All threads exited, no sync is needed. Destroy mutex and condvars
|
|
(void) pthread_mutex_destroy(&ctx->mutex);
|
|
(void) pthread_cond_destroy(&ctx->cond);
|
|
(void) pthread_cond_destroy(&ctx->sq_empty);
|
|
(void) pthread_cond_destroy(&ctx->sq_full);
|
|
|
|
#if !defined(NO_SSL)
|
|
uninitialize_ssl(ctx);
|
|
#endif
|
|
|
|
// Signal mg_stop() that we're done
|
|
ctx->stop_flag = 2;
|
|
|
|
DEBUG_TRACE(("exiting"));
|
|
}
|
|
|
|
static void free_context(struct mg_context *ctx) {
|
|
int i;
|
|
|
|
// Deallocate config parameters
|
|
for (i = 0; i < NUM_OPTIONS; i++) {
|
|
if (ctx->config[i] != NULL)
|
|
free(ctx->config[i]);
|
|
}
|
|
|
|
// Deallocate SSL context
|
|
if (ctx->ssl_ctx != NULL) {
|
|
SSL_CTX_free(ctx->ssl_ctx);
|
|
}
|
|
#ifndef NO_SSL
|
|
if (ssl_mutexes != NULL) {
|
|
free(ssl_mutexes);
|
|
}
|
|
#endif // !NO_SSL
|
|
|
|
// Deallocate context itself
|
|
free(ctx);
|
|
}
|
|
|
|
void mg_stop(struct mg_context *ctx) {
|
|
ctx->stop_flag = 1;
|
|
|
|
// Wait until mg_fini() stops
|
|
while (ctx->stop_flag != 2) {
|
|
mg_sleep(10);
|
|
}
|
|
free_context(ctx);
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
(void) WSACleanup();
|
|
#endif // _WIN32
|
|
}
|
|
|
|
struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
|
|
const char **options) {
|
|
struct mg_context *ctx;
|
|
const char *name, *value, *default_value;
|
|
int i;
|
|
|
|
#if defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
WSADATA data;
|
|
WSAStartup(MAKEWORD(2,2), &data);
|
|
InitializeCriticalSection(&global_log_file_lock);
|
|
#endif // _WIN32
|
|
|
|
// Allocate context and initialize reasonable general case defaults.
|
|
// TODO(lsm): do proper error handling here.
|
|
ctx = (struct mg_context *) calloc(1, sizeof(*ctx));
|
|
ctx->user_callback = user_callback;
|
|
ctx->user_data = user_data;
|
|
|
|
while (options && (name = *options++) != NULL) {
|
|
if ((i = get_option_index(name)) == -1) {
|
|
cry(fc(ctx), "Invalid option: %s", name);
|
|
free_context(ctx);
|
|
return NULL;
|
|
} else if ((value = *options++) == NULL) {
|
|
cry(fc(ctx), "%s: option value cannot be NULL", name);
|
|
free_context(ctx);
|
|
return NULL;
|
|
}
|
|
if (ctx->config[i] != NULL) {
|
|
cry(fc(ctx), "%s: duplicate option", name);
|
|
}
|
|
ctx->config[i] = mg_strdup(value);
|
|
DEBUG_TRACE(("[%s] -> [%s]", name, value));
|
|
}
|
|
|
|
// Set default value if needed
|
|
for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
|
|
default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
|
|
if (ctx->config[i] == NULL && default_value != NULL) {
|
|
ctx->config[i] = mg_strdup(default_value);
|
|
DEBUG_TRACE(("Setting default: [%s] -> [%s]",
|
|
config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
|
|
default_value));
|
|
}
|
|
}
|
|
|
|
// NOTE(lsm): order is important here. SSL certificates must
|
|
// be initialized before listening ports. UID must be set last.
|
|
if (!set_gpass_option(ctx) ||
|
|
#if !defined(NO_SSL)
|
|
!set_ssl_option(ctx) ||
|
|
#endif
|
|
!set_ports_option(ctx) ||
|
|
#if !defined(_WIN32)
|
|
!set_uid_option(ctx) ||
|
|
#endif
|
|
!set_acl_option(ctx)) {
|
|
free_context(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
#if !defined(_WIN32) && !defined(__SYMBIAN32__)
|
|
// Ignore SIGPIPE signal, so if browser cancels the request, it
|
|
// won't kill the whole process.
|
|
(void) signal(SIGPIPE, SIG_IGN);
|
|
// Also ignoring SIGCHLD to let the OS to reap zombies properly.
|
|
(void) signal(SIGCHLD, SIG_IGN);
|
|
#endif // !_WIN32
|
|
|
|
(void) pthread_mutex_init(&ctx->mutex, NULL);
|
|
(void) pthread_cond_init(&ctx->cond, NULL);
|
|
(void) pthread_cond_init(&ctx->sq_empty, NULL);
|
|
(void) pthread_cond_init(&ctx->sq_full, NULL);
|
|
|
|
// Start master (listening) thread
|
|
start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
|
|
|
|
// Start worker threads
|
|
for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
|
|
if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
|
|
cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
|
|
} else {
|
|
ctx->num_threads++;
|
|
}
|
|
}
|
|
|
|
return ctx;
|
|
}
|