+ if(fork()) {
+ c->socket = fd[0];
+ close(fd[1]);
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Using proxy %s", command);
+ return;
+ }
+
+ close(0);
+ close(1);
+ close(fd[0]);
+ dup2(fd[1], 0);
+ dup2(fd[1], 1);
+ close(fd[1]);
+
+ // Other filedescriptors should be closed automatically by CLOEXEC
+
+ char *host = NULL;
+ char *port = NULL;
+
+ sockaddr2str(&c->address, &host, &port);
+ setenv("REMOTEADDRESS", host, true);
+ setenv("REMOTEPORT", port, true);
+ setenv("NODE", c->name, true);
+ setenv("NAME", myself->name, true);
+ if(netname)
+ setenv("NETNAME", netname, true);
+
+ int result = system(command);
+ if(result < 0)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not execute %s: %s", command, strerror(errno));
+ else if(result)
+ logger(DEBUG_ALWAYS, LOG_ERR, "%s exited with non-zero status %d", command, result);
+ exit(result);
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Proxy type exec not supported on this platform!");
+ return;
+#endif
+}
+
+static void handle_meta_write(connection_t *c) {
+ if(c->outbuf.len <= c->outbuf.offset)
+ return;
+
+ ssize_t outlen = send(c->socket, c->outbuf.data + c->outbuf.offset, c->outbuf.len - c->outbuf.offset, 0);
+ if(outlen <= 0) {
+ if(!errno || errno == EPIPE) {
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Connection closed by %s (%s)", c->name, c->hostname);
+ } else if(sockwouldblock(sockerrno)) {
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Sending %d bytes to %s (%s) would block", c->outbuf.len - c->outbuf.offset, c->name, c->hostname);
+ return;
+ } else {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Could not send %d bytes of data to %s (%s): %s", c->outbuf.len - c->outbuf.offset, c->name, c->hostname, strerror(errno));
+ }
+
+ terminate_connection(c, c->status.active);
+ return;
+ }
+
+ buffer_read(&c->outbuf, outlen);
+ if(!c->outbuf.len)
+ io_set(&c->io, IO_READ);
+}
+
+static void handle_meta_io(void *data, int flags) {
+ connection_t *c = data;
+
+ if(c->status.connecting) {
+ c->status.connecting = false;
+
+ int result;
+ socklen_t len = sizeof result;
+ getsockopt(c->socket, SOL_SOCKET, SO_ERROR, (void *)&result, &len);
+
+ if(!result)
+ finish_connecting(c);
+ else {
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Error while connecting to %s (%s): %s", c->name, c->hostname, sockstrerror(result));
+ terminate_connection(c, false);
+ return;
+ }
+ }
+
+ if(flags & IO_WRITE)
+ handle_meta_write(c);
+ else
+ handle_meta_connection_data(c);
+}
+
+bool do_outgoing_connection(outgoing_t *outgoing) {
+ char *address, *port, *space;
+ struct addrinfo *proxyai = NULL;
+ int result;
+