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Problem: race condition in making socket non-inheritable

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Solution: create sockets with WSA_FLAG_NO_HANDLE_INHERIT
This commit is contained in:
Simon Giesecke 2018-05-23 10:27:41 +02:00
parent 44da0e7e42
commit 2d9a8955f5
1 changed files with 7 additions and 0 deletions
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7
src/ip.cpp
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@ -76,7 +76,14 @@ zmq::fd_t zmq::open_socket (int domain_, int type_, int protocol_)
type_ |= SOCK_CLOEXEC; type_ |= SOCK_CLOEXEC;
#endif #endif
#if defined ZMQ_HAVE_WINDOWS && defined WSA_FLAG_NO_HANDLE_INHERIT
// if supported, create socket with WSA_FLAG_NO_HANDLE_INHERIT, such that
// the race condition in making it non-inheritable later is avoided
const fd_t s = WSASocket (domain_, type_, protocol_, NULL, 0,
WSA_FLAG_NO_HANDLE_INHERIT);
#else
const fd_t s = socket (domain_, type_, protocol_); const fd_t s = socket (domain_, type_, protocol_);
#endif
if (s == retired_fd) { if (s == retired_fd) {
#ifdef ZMQ_HAVE_WINDOWS #ifdef ZMQ_HAVE_WINDOWS
errno = wsa_error_to_errno (WSAGetLastError ()); errno = wsa_error_to_errno (WSAGetLastError ());