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-rw-r--r--sysdep/bsd/sysio.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdep/bsd/sysio.h b/sysdep/bsd/sysio.h
index 847ce26..95f7dcf 100644
--- a/sysdep/bsd/sysio.h
+++ b/sysdep/bsd/sysio.h
@@ -237,3 +237,34 @@ sk_set_md5_auth_int(sock *s, sockaddr *sa, char *passwd)
return rv;
}
+
+
+#ifndef IPV6
+
+static int
+sk_set_min_ttl4(sock *s, int ttl)
+{
+ if (setsockopt(s->fd, IPPROTO_IP, IP_MINTTL, &ttl, sizeof(ttl)) < 0)
+ {
+ if (errno == ENOPROTOOPT)
+ log(L_ERR "Kernel does not support IPv4 TTL security");
+ else
+ log(L_ERR "sk_set_min_ttl4: setsockopt: %m");
+
+ return -1;
+ }
+
+ return 0;
+}
+
+#else
+
+static int
+sk_set_min_ttl6(sock *s, int ttl)
+{
+ log(L_ERR "IPv6 TTL security not supported");
+ return -1;
+}
+
+#endif
+