Module: kamailio Branch: master Commit: febccd6808d0729fca1bbf452d43c253ca79249a URL: https://github.com/kamailio/kamailio/commit/febccd6808d0729fca1bbf452d43c25… Author: Daniel-Constantin Mierla <miconda(a)gmail.com> Committer: Daniel-Constantin Mierla <miconda(a)gmail.com> Date: 2017-07-18T09:09:29+02:00 core: dns - safety checks for port and proto pointers --- Modified: src/core/dns_cache.c Modified: src/core/resolve.c --- Diff: https://github.com/kamailio/kamailio/commit/febccd6808d0729fca1bbf452d43c25… Patch: https://github.com/kamailio/kamailio/commit/febccd6808d0729fca1bbf452d43c25… --- diff --git a/src/core/dns_cache.c b/src/core/dns_cache.c index e37361ffbb..3558a5ffcb 100644 --- a/src/core/dns_cache.c +++ b/src/core/dns_cache.c @@ -2560,7 +2560,7 @@ struct hostent* dns_srv_get_he(str* name, unsigned short* port, int flags) rr_name.len=((struct srv_rdata*)rr->rdata)->name_len; if ((he=dns_get_he(&rr_name, flags))!=0){ /* success, at least one good ip found */ - *port=((struct srv_rdata*)rr->rdata)->port; + if(port) *port=((struct srv_rdata*)rr->rdata)->port; goto end; } rr_no++; /* try from the next record, the current one was not good */ @@ -3213,9 +3213,9 @@ inline static int dns_srv_sip_resolve(struct dns_srv_handle* h, str* name, int ret; struct hostent* he; size_t i,list_len; - char origproto; + char origproto = 0; - origproto = *proto; + if(proto) origproto = *proto; if (dns_hash==0){ /* not init => use normal, non-cached version */ LM_WARN("called before dns cache initialization\n"); h->srv=h->a=0; @@ -3344,7 +3344,7 @@ inline static int dns_naptr_sip_resolve(struct dns_srv_handle* h, str* name, int ret; ret=-E_DNS_NO_NAPTR; - origproto=*proto; + if(proto) origproto=*proto; if (dns_hash==0){ /* not init => use normal, non-cached version */ LM_WARN("called before dns cache initialization\n"); h->srv=h->a=0; @@ -3399,7 +3399,7 @@ inline static int dns_naptr_sip_resolve(struct dns_srv_handle* h, str* name, from previous dns_srv_sip_resolve calls */ } naptr_not_found: - *proto=origproto; + if(proto) *proto=origproto; return dns_srv_sip_resolve(h, name, ip, port, proto, flags); } #endif /* USE_NAPTR */ diff --git a/src/core/resolve.c b/src/core/resolve.c index 3d574182e9..7073a9a9e6 100644 --- a/src/core/resolve.c +++ b/src/core/resolve.c @@ -1597,7 +1597,7 @@ struct hostent* naptr_sip_resolvehost(str* name, unsigned short* port, naptr_bmp_t tried_bmp; /* tried bitmap */ char origproto; - origproto = *proto; + if(proto) origproto = *proto; naptr_head=0; he=0; if (name->len >= MAX_DNS_NAME) { @@ -1634,7 +1634,7 @@ struct hostent* naptr_sip_resolvehost(str* name, unsigned short* port, #endif } /* fallback to srv lookup */ - *proto = origproto; + if(proto) *proto = origproto; he=no_naptr_srv_sip_resolvehost(name,port,proto); /* fallback all the way down to A/AAAA */ if (he==0) {