+static void handle_meta_write(meshlink_handle_t *mesh, 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, MSG_NOSIGNAL);
+ if(outlen <= 0) {
+ if(!errno || errno == EPIPE)
+ logger(mesh, MESHLINK_INFO, "Connection closed by %s", c->name);
+ else if(sockwouldblock(sockerrno)) {
+ logger(mesh, MESHLINK_DEBUG, "Sending %d bytes to %s would block", c->outbuf.len - c->outbuf.offset, c->name);
+ return;
+ } else
+ logger(mesh, MESHLINK_ERROR, "Could not send %d bytes of data to %s: %s", c->outbuf.len - c->outbuf.offset, c->name, strerror(errno));
+
+ terminate_connection(mesh, c, c->status.active);
+ return;
+ }
+
+ buffer_read(&c->outbuf, outlen);
+ if(!c->outbuf.len)
+ io_set(&mesh->loop, &c->io, IO_READ);
+}
+
+static void handle_meta_io(event_loop_t *loop, void *data, int flags) {
+ meshlink_handle_t *mesh = loop->data;
+ 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(mesh, c);
+ else {
+ logger(mesh, MESHLINK_DEBUG, "Error while connecting to %s: %s", c->name, sockstrerror(result));
+ terminate_connection(mesh, c, false);
+ return;
+ }
+ }
+
+ if(flags & IO_WRITE)
+ handle_meta_write(mesh, c);
+ else
+ handle_meta_connection_data(mesh, c);
+}
+
+// Find edges pointing to this node, and use them to build a list of unique, known addresses.
+static struct addrinfo *get_known_addresses(node_t *n) {
+ struct addrinfo *ai = NULL;
+
+ for splay_each(edge_t, e, n->edge_tree) {
+ if(!e->reverse)
+ continue;
+
+ bool found = false;
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ if(!sockaddrcmp(&e->reverse->address, (sockaddr_t *)aip->ai_addr)) {
+ found = true;
+ break;
+ }
+ }
+ if(found)
+ continue;
+
+ // Create a new struct addrinfo, and put it at the head of the list.
+ struct addrinfo *nai = xzalloc(sizeof(*nai) + SALEN(e->reverse->address.sa));
+ nai->ai_next = ai;
+ ai = nai;
+
+ ai->ai_family = e->reverse->address.sa.sa_family;
+ ai->ai_socktype = SOCK_STREAM;
+ ai->ai_protocol = IPPROTO_TCP;
+ ai->ai_addrlen = SALEN(e->reverse->address.sa);
+ ai->ai_addr = (struct sockaddr *)(nai + 1);
+ memcpy(ai->ai_addr, &e->reverse->address, ai->ai_addrlen);
+ }
+
+ return ai;
+}
+
+// Free struct addrinfo list from get_known_addresses().
+static void free_known_addresses(struct addrinfo *ai) {
+ for(struct addrinfo *aip = ai, *next; aip; aip = next) {
+ next = aip->ai_next;
+ free(aip);
+ }
+}
+
+bool do_outgoing_connection(meshlink_handle_t *mesh, outgoing_t *outgoing) {