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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 21:23:58 +01:00
Make errors retrievable from tor_socketpair; resolve bug 163.
svn:r4509
This commit is contained in:
parent
584a0ae397
commit
d85bfe83bf
@ -294,15 +294,17 @@ set_socket_nonblocking(int socket)
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* be able to read while localhost is down later (the socket pair may
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* even close, depending on OS-specific timeouts).
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*
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* XXX Bug: this function assumes errno is how you report errors, but
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* that isn't the case for Windows, which is where it's most likely
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* to be called.
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* Returns 0 on success and -errno on failure; do not rely on the value
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* of errno or WSAGetLastSocketError().
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**/
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/* It would be nicer just to set errno, but that won't work for windows. */
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int
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tor_socketpair(int family, int type, int protocol, int fd[2])
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{
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#ifdef HAVE_SOCKETPAIR
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return socketpair(family, type, protocol, fd);
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int r;
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r = socketpair(family, type, protocol, fd);
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return r < 0 ? -errno : r;
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#else
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/* This socketpair does not work when localhost is down. So
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* it's really not the same thing at all. But it's close enough
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@ -315,6 +317,7 @@ tor_socketpair(int family, int type, int protocol, int fd[2])
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struct sockaddr_in listen_addr;
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struct sockaddr_in connect_addr;
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int size;
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int saved_errno = -1;
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if (protocol
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#ifdef AF_UNIX
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@ -322,24 +325,22 @@ tor_socketpair(int family, int type, int protocol, int fd[2])
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#endif
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) {
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#ifdef MS_WINDOWS
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errno = WSAEAFNOSUPPORT;
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return -WSAEAFNOSUPPORT;
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#else
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errno = EAFNOSUPPORT;
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return -EAFNOSUPPORT;
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#endif
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return -1;
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}
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if (!fd) {
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errno = EINVAL;
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return -1;
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return -EINVAL;
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}
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listener = socket(AF_INET, type, 0);
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if (listener == -1)
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return -1;
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return -tor_socket_errno(-1);
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if (!SOCKET_IS_POLLABLE(listener)) {
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log_fn(LOG_WARN, "Too many connections; can't open socketpair");
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tor_close_socket(listener);
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return -1;
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return -ENCONN;
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}
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memset(&listen_addr, 0, sizeof(listen_addr));
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listen_addr.sin_family = AF_INET;
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@ -347,13 +348,13 @@ tor_socketpair(int family, int type, int protocol, int fd[2])
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listen_addr.sin_port = 0; /* kernel chooses port. */
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if (bind(listener, (struct sockaddr *) &listen_addr, sizeof (listen_addr))
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== -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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if (listen(listener, 1) == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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connector = socket(AF_INET, type, 0);
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if (connector == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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if (!SOCKET_IS_POLLABLE(connector)) {
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log_fn(LOG_WARN, "Too many connections; can't open socketpair");
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goto tidy_up_and_fail;
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@ -361,33 +362,33 @@ tor_socketpair(int family, int type, int protocol, int fd[2])
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/* We want to find out the port number to connect to. */
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size = sizeof(connect_addr);
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if (getsockname(listener, (struct sockaddr *) &connect_addr, &size) == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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if (size != sizeof (connect_addr))
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goto abort_tidy_up_and_fail;
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goto abort_tidy_up_and_fail;
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if (connect(connector, (struct sockaddr *) &connect_addr,
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sizeof(connect_addr)) == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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size = sizeof(listen_addr);
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acceptor = accept(listener, (struct sockaddr *) &listen_addr, &size);
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if (acceptor == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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if (!SOCKET_IS_POLLABLE(acceptor)) {
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log_fn(LOG_WARN, "Too many connections; can't open socketpair");
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goto tidy_up_and_fail;
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}
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if (size != sizeof(listen_addr))
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goto abort_tidy_up_and_fail;
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goto abort_tidy_up_and_fail;
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tor_close_socket(listener);
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/* Now check we are talking to ourself by matching port and host on the
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two sockets. */
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if (getsockname(connector, (struct sockaddr *) &connect_addr, &size) == -1)
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goto tidy_up_and_fail;
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goto tidy_up_and_fail;
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if (size != sizeof (connect_addr)
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|| listen_addr.sin_family != connect_addr.sin_family
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|| listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
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|| listen_addr.sin_port != connect_addr.sin_port) {
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goto abort_tidy_up_and_fail;
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goto abort_tidy_up_and_fail;
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}
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fd[0] = connector;
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fd[1] = acceptor;
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@ -396,22 +397,20 @@ tor_socketpair(int family, int type, int protocol, int fd[2])
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abort_tidy_up_and_fail:
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#ifdef MS_WINDOWS
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errno = WSAECONNABORTED;
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saved_errno = WSAECONNABORTED;
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#else
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errno = ECONNABORTED; /* I hope this is portable and appropriate. */
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saved_errno = ECONNABORTED; /* I hope this is portable and appropriate. */
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#endif
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tidy_up_and_fail:
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{
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int save_errno = errno;
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if (listener != -1)
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tor_close_socket(listener);
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if (connector != -1)
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tor_close_socket(connector);
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if (acceptor != -1)
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tor_close_socket(acceptor);
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errno = save_errno;
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return -1;
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}
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if (saved_errno < 0)
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saved_errno = errno;
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if (listener != -1)
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tor_close_socket(listener);
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if (connector != -1)
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tor_close_socket(connector);
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if (acceptor != -1)
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tor_close_socket(acceptor);
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return -saved_errno;
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#endif
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}
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@ -1207,12 +1207,13 @@ connection_ap_make_bridge(char *address, uint16_t port)
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{
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int fd[2];
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connection_t *conn;
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int err;
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log_fn(LOG_INFO,"Making AP bridge to %s:%d ...",safe_str(address),port);
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if (tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0) {
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if ((err = tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) < 0) {
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log(LOG_WARN,"Couldn't construct socketpair (%s). Network down? Delaying.",
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tor_socket_strerror(tor_socket_errno(-1)));
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tor_socket_strerror(-err));
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return -1;
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}
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@ -301,11 +301,11 @@ spawn_cpuworker(void)
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int *fdarray;
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int fd;
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connection_t *conn;
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int err;
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fdarray = tor_malloc(sizeof(int)*2);
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if (tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fdarray) < 0) {
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log(LOG_ERR, "Couldn't construct socketpair: %s",
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tor_socket_strerror(tor_socket_errno(-1)));
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if ((err = tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fdarray)) < 0) {
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log(LOG_ERR, "Couldn't construct socketpair: %s", tor_socket_strerror(-err));
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tor_cleanup();
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tor_free(fdarray);
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exit(1);
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@ -824,11 +824,11 @@ spawn_dnsworker(void)
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int *fdarray;
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int fd;
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connection_t *conn;
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int err;
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fdarray = tor_malloc(sizeof(int)*2);
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if (tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fdarray) < 0) {
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log(LOG_ERR, "Couldn't construct socketpair: %s",
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tor_socket_strerror(tor_socket_errno(-1)));
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if ((err = tor_socketpair(AF_UNIX, SOCK_STREAM, 0, fdarray)) < 0) {
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log(LOG_ERR, "Couldn't construct socketpair: %s", tor_socket_strerror(-err));
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tor_cleanup();
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tor_free(fdarray);
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exit(1);
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