Fix a crash with some network configurations.

It is apparently possible for getifaddrs() to return a struct ifaddrs that
contains a NULL ifa_addr pointer.

diff --git a/src/meshlink.c b/src/meshlink.c
index 0fe7343c7ae6a789ab517f2973a6ab5920970c84..d54fe30b1ae8f49500214036709f983b6a015ba3 100644 (file)
--- a/src/meshlink.c
+++ b/src/meshlink.c
@@ -366,7 +366,7 @@ char *meshlink_get_local_address_for_family(meshlink_handle_t *mesh, int family)
                for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) {
                        sockaddr_t *sa = (sockaddr_t *)ifap->ifa_addr;
 
                for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) {
                        sockaddr_t *sa = (sockaddr_t *)ifap->ifa_addr;
 

-                       if(sa->sa.sa_family != family) {
+                       if(!sa || sa->sa.sa_family != family) {

                                continue;
                        }
 
                                continue;
                        }