- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
- sd_rtnl_message *m;
- bool first = true;
- int r;
-
- assert(rtnl);
- assert(ifindex >= 0);
-
- r = sd_rtnl_message_new_route(rtnl, &req, RTM_GETROUTE, AF_UNSPEC, RTPROT_UNSPEC);
- if (r < 0)
- return r;
-
- r = sd_rtnl_message_request_dump(req, true);
- if (r < 0)
- return r;
-
- r = sd_rtnl_call(rtnl, req, 0, &reply);
- if (r < 0)
- return r;
-
- for (m = reply; m; m = sd_rtnl_message_next(m)) {
- _cleanup_free_ char *gateway = NULL, *gateway_description = NULL;
- union in_addr_union gw = {};
- uint16_t type;
- uint32_t ifi;
- int family;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_error_errno(r, "got error: %m");
- continue;
- }
-
- r = sd_rtnl_message_get_type(m, &type);
- if (r < 0) {
- log_error_errno(r, "could not get type: %m");
- continue;
- }
-
- if (type != RTM_NEWROUTE) {
- log_error("type is not RTM_NEWROUTE");
- continue;
- }
-
- r = sd_rtnl_message_route_get_family(m, &family);
- if (r < 0) {
- log_error_errno(r, "could not get family: %m");
- continue;
- }
-
- r = sd_rtnl_message_read_u32(m, RTA_OIF, &ifi);
- if (r < 0) {
- log_error_errno(r, "could not get RTA_OIF: %m");
- continue;
- }
-
- if (ifindex > 0 && ifi != (unsigned) ifindex)
- continue;
-
- switch (family) {
- case AF_INET:
- r = sd_rtnl_message_read_in_addr(m, RTA_GATEWAY, &gw.in);
- if (r < 0)
- continue;
-
- r = sd_rtnl_message_read_in_addr(m, RTA_DST, NULL);
- if (r >= 0)
- continue;
-
- r = sd_rtnl_message_read_in_addr(m, RTA_SRC, NULL);
- if (r >= 0)
- continue;
-
- break;
- case AF_INET6:
- r = sd_rtnl_message_read_in6_addr(m, RTA_GATEWAY, &gw.in6);
- if (r < 0)
- continue;
-
- r = sd_rtnl_message_read_in6_addr(m, RTA_DST, NULL);
- if (r >= 0)
- continue;