+/**
+ * Try to set the local address for a newly-created socket. Return -1
+ * if this fails.
+ **/
+int try_bind_local(int s,
+ int ai_family, int ai_socktype,
+ const char *bind_address)
+{
+ int error;
+ struct addrinfo bhints, *bres_all, *r;
+
+ memset(&bhints, 0, sizeof(bhints));
+ bhints.ai_family = ai_family;
+ bhints.ai_socktype = ai_socktype;
+ bhints.ai_flags = AI_PASSIVE;
+ if ((error = getaddrinfo(bind_address, NULL, &bhints, &bres_all))) {
+ rprintf(FERROR, RSYNC_NAME ": getaddrinfo %s: %s\n",
+ bind_address, gai_strerror(error));
+ return -1;
+ }
+
+ for (r = bres_all; r; r = r->ai_next) {
+ if (bind(s, r->ai_addr, r->ai_addrlen) == -1)
+ continue;
+ return s;
+ }
+
+ /* no error message; there might be some problem that allows
+ * creation of the socket but not binding, perhaps if the
+ * machine has no ipv6 address of this name. */
+ return -1;
+}
+