diff options
Diffstat (limited to 'src/lib/net/socketpair.c')
| -rw-r--r-- | src/lib/net/socketpair.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/lib/net/socketpair.c b/src/lib/net/socketpair.c index 10eb749735..d4310020cb 100644 --- a/src/lib/net/socketpair.c +++ b/src/lib/net/socketpair.c @@ -1,6 +1,11 @@ /* Copyright (c) 2003-2004, Roger Dingledine * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. - * Copyright (c) 2007-2019, The Tor Project, Inc. */ + * Copyright (c) 2007-2020, The Tor Project, Inc. */ + +/** + * @file socketpair.c + * @brief Replacement socketpair() for systems that lack it + **/ #include "lib/cc/torint.h" #include "lib/net/socketpair.h" @@ -22,11 +27,11 @@ #include <windows.h> #define socket_errno() (WSAGetLastError()) #define SOCKET_EPROTONOSUPPORT WSAEPROTONOSUPPORT -#else +#else /* !defined(_WIN32) */ #define closesocket(x) close(x) #define socket_errno() (errno) #define SOCKET_EPROTONOSUPPORT EPROTONOSUPPORT -#endif +#endif /* defined(_WIN32) */ #ifdef NEED_ERSATZ_SOCKETPAIR @@ -105,7 +110,12 @@ sockaddr_eq(struct sockaddr *sa1, struct sockaddr *sa2) /** * Helper used to implement socketpair on systems that lack it, by * making a direct connection to localhost. - */ + * + * See tor_socketpair() for details. + * + * The direct connection defaults to IPv4, but falls back to IPv6 if + * IPv4 is not supported. + **/ int tor_ersatz_socketpair(int family, int type, int protocol, tor_socket_t fd[2]) { |