Always call res_init() before getaddrinfo().

[tinc] / src / netutl.c

diff --git a/src/netutl.c b/src/netutl.c
index 11a06ed..fc3cdc9 100644 (file)
--- a/src/netutl.c
+++ b/src/netutl.c
@@ -39,6 +39,10 @@ struct addrinfo *str2addrinfo(const char *address, const char *service, int sock
        hint.ai_family = addressfamily;
        hint.ai_socktype = socktype;
 
+#ifdef HAVE_DECL_RES_INIT
+       // ensure glibc reloads /etc/resolv.conf.
+       res_init();
+#endif
        err = getaddrinfo(address, service, &hint, &ai);
 
        if(err) {
@@ -83,8 +87,10 @@ void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
        int err;
 
        if(sa->sa.sa_family == AF_UNKNOWN) {
-               *addrstr = xstrdup(sa->unknown.address);
-               *portstr = xstrdup(sa->unknown.port);
+               if(addrstr)
+                       *addrstr = xstrdup(sa->unknown.address);
+               if(portstr)
+                       *portstr = xstrdup(sa->unknown.port);
                return;
        }