check valid response from gethostbyname()

1 files changed, 1 insertions, 1 deletions

diff --git a/dyndhcpd.c b/dyndhcpd.c
index 82c20ee..873dc75 100644
--- a/dyndhcpd.c
+++ b/dyndhcpd.c
@@ -142,7 +142,7 @@ int main(int argc, char ** argv) {
 
 	/* get the domainname */
 	hp = gethostbyname(hostname);
-	if ((domainname = strchr(hp->h_name, '.')) != NULL)
+	if (hp && (domainname = strchr(hp->h_name, '.')) != NULL)
 		domainname++;
 	else {
 		fprintf(stderr, "Could not get domainname, using '" FALLBACKDOMAIN "'\n");