[sr-dev] [kamailio/kamailio] is_first_hop() not processing FQDN in RR header in a case of reply (#2732)

### Description In the case of using FQDN in `listen = ... advertise ... ` FQDN is populated in the `Record-Route` header. In this case `is_first_hop()` function is not returning true even if `FQDN == myself` in replies. #### Reproduction Add FQND in advertise and check `is_first_hop()` result in a case of reply #### Log Messages ``` siputils [sipops.c:185]: is_first_hop(): uri host is not an ip address ``` ### Possible Solutions Not use `is_first_hop()` in the case of reply/FQDN in advertising. ### Additional Information version: kamailio 5.4.4 (x86_64/linux) e16352 flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: e16352 compiled on 09:50:10 May 7 2021 with gcc 4.8.5 * **Operating System**: ``` # uname -a Linux fe-0513-2-dev 3.10.0-1160.21.1.el7.x86_64 #1 SMP Tue Mar 16 18:28:22 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux ``` https://github.com/kamailio/kamailio/blob/02240711239149e2f5c4890a70ab158d1… -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2732