commit 9369152aae9527cc3764cac8688f258b11bd503d Author: rl1987 rl1987@sdf.lonestar.org Date: Mon Dec 3 14:28:32 2018 +0200

Check that new listener connection is actually listening --- src/core/mainloop/connection.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)

diff --git a/src/core/mainloop/connection.c b/src/core/mainloop/connection.c index eaad45c81..66a8b5147 100644 --- a/src/core/mainloop/connection.c +++ b/src/core/mainloop/connection.c @@ -1460,6 +1460,19 @@ connection_listener_new(const struct sockaddr *listensockaddr, tor_socket_strerror(tor_socket_errno(s))); goto err; } + +#ifndef __APPLE__ + int value; + socklen_t len = sizeof(value); + + if (!getsockopt(s, SOL_SOCKET, SO_ACCEPTCONN, &value, &len)) { + if (value == 0) { + log_err(LD_NET, "Could not listen on %s - " + "getsockopt(.,SO_ACCEPTCONN,.) yields 0.", address); + goto err; + } + } +#endif /* __APPLE__ */ #endif /* defined(HAVE_SYS_UN_H) */ } else { log_err(LD_BUG, "Got unexpected address family %d.",