2 files changed, 14 insertions, 0 deletions
diff --git a/lib/sockopt.c b/lib/sockopt.c
index 985c3a38..e0027e88 100644
--- a/lib/sockopt.c
+++ b/lib/sockopt.c
@@ -342,6 +342,19 @@ setsockopt_ipv4_ifindex (int sock, int val)
 }
 
 int
+setsockopt_ipv4_tos(int sock, int tos)
+{
+  int ret;
+
+  ret = setsockopt (sock, IPPROTO_IP, IP_TOS, &tos, sizeof (tos));
+  if (ret < 0)
+    zlog_warn ("Can't set IP_TOS option for fd %d to %#x: %s",
+	       sock, tos, safe_strerror(errno));
+  return ret;
+}
+
+
+int
 setsockopt_ifindex (int af, int sock, int val)
 {
   int ret = -1;
diff --git a/lib/sockopt.h b/lib/sockopt.h
index 158f17ac..df0de61c 100644
--- a/lib/sockopt.h
+++ b/lib/sockopt.h
@@ -87,6 +87,7 @@ extern int setsockopt_multicast_ipv4(int sock, int optname,
 			             unsigned int ifindex
 					 /* optional: if non-zero, may be used
 					 	instead of if_addr */);
+extern int setsockopt_ipv4_tos(int sock, int tos);
 
 /* Ask for, and get, ifindex, by whatever method is supported. */
 extern int setsockopt_ifindex (int, int, int);