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127cd7585a
Abstract socket pathnames must have a NULL character in the first position, but the second character must also be checked to differentiate an abstract name from the empty string. The address length must also indicate the length of the pathname because the kernel uses the entire address as the name, including NULL characters. ZMQ uses NULL-terminated strings for the address, so the abstract address length is the length of the string following the initial NULL byte plus 3; two bytes for the address family and one for the initial NULL character.
107 lines
2.5 KiB
C++
107 lines
2.5 KiB
C++
/*
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Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ipc_address.hpp"
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#if !defined ZMQ_HAVE_WINDOWS && !defined ZMQ_HAVE_OPENVMS
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#include "err.hpp"
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#include <string>
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#include <sstream>
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zmq::ipc_address_t::ipc_address_t ()
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{
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memset (&address, 0, sizeof (address));
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}
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zmq::ipc_address_t::ipc_address_t (const sockaddr *sa, socklen_t sa_len)
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{
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zmq_assert(sa && sa_len > 0);
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memset (&address, 0, sizeof (address));
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if (sa->sa_family == AF_UNIX) {
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memcpy(&address, sa, sa_len);
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}
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}
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zmq::ipc_address_t::~ipc_address_t ()
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{
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}
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int zmq::ipc_address_t::resolve (const char *path_)
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{
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if (strlen (path_) >= sizeof (address.sun_path)) {
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errno = ENAMETOOLONG;
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return -1;
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}
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#if defined ZMQ_HAVE_LINUX
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if (path_[0] == '@' && !path_[1]) {
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errno = EINVAL;
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return -1;
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}
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#endif
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address.sun_family = AF_UNIX;
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strcpy (address.sun_path, path_);
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#if defined ZMQ_HAVE_LINUX
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/* Abstract sockets on Linux start with '\0' */
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if (path_[0] == '@')
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*address.sun_path = '\0';
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#endif
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return 0;
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}
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int zmq::ipc_address_t::to_string (std::string &addr_)
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{
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if (address.sun_family != AF_UNIX) {
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addr_.clear ();
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return -1;
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}
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std::stringstream s;
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#if !defined ZMQ_HAVE_LINUX
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s << "ipc://" << address.sun_path;
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#else
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s << "ipc://";
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if (!address.sun_path[0] && address.sun_path[1])
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s << "@" << address.sun_path + 1;
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else
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s << address.sun_path;
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#endif
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addr_ = s.str ();
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return 0;
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}
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const sockaddr *zmq::ipc_address_t::addr () const
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{
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return (sockaddr*) &address;
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}
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socklen_t zmq::ipc_address_t::addrlen () const
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{
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#if defined ZMQ_HAVE_LINUX
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if (!address.sun_path[0] && address.sun_path[1])
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return (socklen_t) strlen(address.sun_path + 1) + sizeof (sa_family_t) + 1;
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#endif
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return (socklen_t) sizeof (address);
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}
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#endif
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