+ if (record) {
+ /* Translate IP to string */
+ if (!inet_ntop(af, record->h_addr_list[0], dst, size)) {
+ PERROR("inet_ntop");
+ goto error;
+ }
+ } else if (!strcmp(addr, "localhost") &&
+ (af == AF_INET || af == AF_INET6)) {
+ /*
+ * Some systems may not have "localhost" defined in
+ * accordance with IETF RFC 6761. According to this RFC,
+ * applications may recognize "localhost" names as
+ * special and resolve to the appropriate loopback
+ * address.
+ *
+ * We choose to use the system name resolution API first
+ * to honor its network configuration. If this fails, we
+ * resolve to the appropriate loopback address. This is
+ * done to accommodates systems which may want to start
+ * tracing before their network configured.
+ */
+ const char *loopback_addr = af == AF_INET ?
+ LOOPBACK_ADDR_IPV4 : LOOPBACK_ADDR_IPV6;
+ const size_t loopback_addr_len = af == AF_INET ?
+ sizeof(LOOPBACK_ADDR_IPV4) :
+ sizeof(LOOPBACK_ADDR_IPV6);
+
+ DBG2("Could not resolve localhost address, using fallback");
+ if (loopback_addr_len > size) {
+ ERR("Could not resolve localhost address; destination string is too short");
+ goto error;
+ }
+ strcpy(dst, loopback_addr);
+ } else {