Don't tarpit localhost connections

[tinc] / src / netutl.c

diff --git a/src/netutl.c b/src/netutl.c
index 0c19f5b..6654f97 100644 (file)
--- a/src/netutl.c
+++ b/src/netutl.c
@@ -301,6 +301,23 @@ void sockaddr_setport(sockaddr_t *sa, const char *port) {
        }
 }
 
+bool is_local_connection(const sockaddr_t *sa) {
+       switch(sa->sa.sa_family) {
+       case AF_INET:
+               // 127.0.0.0/8
+               return ntohl(sa->in.sin_addr.s_addr) >> 24 == 127;
+
+       case AF_INET6:
+               return IN6_IS_ADDR_LOOPBACK(&sa->in6.sin6_addr);
+
+       case AF_UNIX:
+               return true;
+
+       default:
+               return false;
+       }
+}
+
 uint16_t get_bound_port(int sockfd) {
        sockaddr_t sa;
        socklen_t salen = sizeof(sa);