Handle UDP packets from different and ports than advertised.

[oweals/tinc.git] / src / netutl.c

diff --git a/src/netutl.c b/src/netutl.c
index 83e19ed859a32197f8c886679832319deb9af82c..206486056de095597f0006f1eddd5d8df339e4c0 100644 (file)
--- a/src/netutl.c
+++ b/src/netutl.c
@@ -144,6 +144,39 @@ char *sockaddr2hostname(const sockaddr_t *sa)
        return str;
 }
 
+int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b)
+{
+       int result;
+
+       cp();
+
+       result = a->sa.sa_family - b->sa.sa_family;
+
+       if(result)
+               return result;
+
+       switch (a->sa.sa_family) {
+               case AF_UNSPEC:
+                       return 0;
+
+               case AF_UNKNOWN:
+                       return strcmp(a->unknown.address, b->unknown.address);
+
+               case AF_INET:
+                       return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+
+               case AF_INET6:
+                       return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+
+               default:
+                       logger(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
+                                  a->sa.sa_family);
+                       cp_trace();
+                       raise(SIGFPE);
+                       exit(0);
+       }
+}
+
 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b)
 {
        int result;