fix compatibility issue with MacOS in release 3.14 (fixes #109)

8 years ago · 356e7b3a69
parent 61afaff31e
commit 356e7b3a69
1 changed files with 9 additions and 4 deletions
--- a/src/fping.c
+++ b/src/fping.c
@ -387,12 +387,17 @@ int main( int argc, char **argv )
        switch( c )
        {
        case 'M':
+#ifdef IP_MTU_DISCOVER
            {
-            int val = IP_PMTUDISC_DO;
-            if (setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val))) {
-                perror("setsockopt IP_MTU_DISCOVER");
-            }
+                int val = IP_PMTUDISC_DO;
+                if (setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val))) {
+                    perror("setsockopt IP_MTU_DISCOVER");
+                }
            }
+#else
+            fprintf(stderr, "-M option not supported on this platform\n");
+            exit(1);
+#endif
            break;

        case 't':