if( ele && strcmp( ele->ifa_name, "lo" ) && // do NOT capture the loopback interface address
(target_if == NULL || strcmp( ele->ifa_name, target_if ) == 0 ) ) { // no target, or matches ENV_BIND_IF target
- if( ele->ifa_addr->sa_family == AF_INET ) {
- getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
- fmt = "%s:%s";
- } else {
- if( ele->ifa_addr->sa_family == AF_INET6 ) {
- getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in6 ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
- fmt = "[%s]:%s";
+ if( ele->ifa_addr != NULL ) { // possible for some interfaces to not have an address
+ if( ele->ifa_addr->sa_family == AF_INET ) {
+ getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
+ fmt = "%s:%s";
+ } else {
+ if( ele->ifa_addr->sa_family == AF_INET6 ) {
+ getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in6 ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
+ fmt = "[%s]:%s";
+ }
}
}