error out when nc minttl is unsupported in set_common_sockopts

1 files changed, 12 insertions, 2 deletions

diff --git a/patches/netcat.c.patch b/patches/netcat.c.patch
index 0383034..680f02b 100644
--- a/patches/netcat.c.patch
+++ b/patches/netcat.c.patch
@@ -131,7 +131,7 @@
         }
         if (Iflag) {
                 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
-@@ -1612,13 +1641,17 @@ set_common_sockopts(int s, int af)
+@@ -1612,13 +1641,27 @@ set_common_sockopts(int s, int af)
         }
  
         if (minttl != -1) {
@@ -139,6 +139,11 @@
                 if (af == AF_INET && setsockopt(s, IPPROTO_IP,
                     IP_MINTTL, &minttl, sizeof(minttl)))
                         err(1, "set IP min TTL");
++#else
++               if (af == AF_INET) {
++                       errno = ENOPROTOOPT;
++                       err(1, "set IP min TTL not supported");
++               }
 +#endif
  
 -               else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
@@ -146,11 +151,16 @@
 +               if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
                     IPV6_MINHOPCOUNT, &minttl, sizeof(minttl)))
                         err(1, "set IPv6 min hop count");
++#else
++               if (af == AF_INET6) {
++                       errno = ENOPROTOOPT;
++                       err(1, "set IPv6 min hop count not supported");
++               }
 +#endif
         }
  }
  
-@@ -1849,15 +1882,19 @@ help(void)
+@@ -1849,15 +1892,19 @@ help(void)
         \t-P proxyuser\tUsername for proxy authentication\n\
         \t-p port\t     Specify local port for remote connects\n\
         \t-R CAfile     CA bundle\n\