1 files changed, 50 insertions, 6 deletions

diff --git a/src/odhcpd.c b/src/odhcpd.c
index aad5b37..5774a4f 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -174,12 +174,6 @@ ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
 			|| IN6_IS_ADDR_MC_LINKLOCAL(&dest->sin6_addr))
 		dest->sin6_scope_id = iface->ifindex;
 
-	// IPV6_PKTINFO doesn't really work for IPv6-raw sockets (bug?)
-	if (dest->sin6_port == 0) {
-		msg.msg_control = NULL;
-		msg.msg_controllen = 0;
-	}
-
 	char ipbuf[INET6_ADDRSTRLEN];
 	inet_ntop(AF_INET6, &dest->sin6_addr, ipbuf, sizeof(ipbuf));
 
@@ -280,6 +274,56 @@ int odhcpd_get_preferred_interface_address(int ifindex, struct in6_addr *addr)
 	return ret;
 }
 
+void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
+		const struct interface *iface, const struct in6_addr *gw,
+		int metric, bool add)
+{
+	struct req {
+		struct nlmsghdr nh;
+		struct rtmsg rtm;
+		struct rtattr rta_dst;
+		struct in6_addr dst_addr;
+		struct rtattr rta_oif;
+		uint32_t ifindex;
+		struct rtattr rta_table;
+		uint32_t table;
+		struct rtattr rta_prio;
+		uint32_t prio;
+		struct rtattr rta_gw;
+		struct in6_addr gw;
+	} req = {
+		{sizeof(req), 0, NLM_F_REQUEST, ++rtnl_seq, 0},
+		{AF_INET6, prefixlen, 0, 0, 0, 0, 0, 0, 0},
+		{sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_DST},
+		*addr,
+		{sizeof(struct rtattr) + sizeof(uint32_t), RTA_OIF},
+		iface->ifindex,
+		{sizeof(struct rtattr) + sizeof(uint32_t), RTA_TABLE},
+		RT_TABLE_MAIN,
+		{sizeof(struct rtattr) + sizeof(uint32_t), RTA_PRIORITY},
+		metric,
+		{sizeof(struct rtattr) + sizeof(struct in6_addr), RTA_GATEWAY},
+		IN6ADDR_ANY_INIT,
+	};
+
+	if (gw)
+		req.gw = *gw;
+
+	if (add) {
+		req.nh.nlmsg_type = RTM_NEWROUTE;
+		req.nh.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE);
+		req.rtm.rtm_protocol = RTPROT_STATIC;
+		req.rtm.rtm_scope = (gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
+		req.rtm.rtm_type = RTN_UNICAST;
+	} else {
+		req.nh.nlmsg_type = RTM_DELROUTE;
+		req.rtm.rtm_scope = RT_SCOPE_NOWHERE;
+	}
+
+	req.nh.nlmsg_len = (gw) ? sizeof(req) : offsetof(struct req, rta_gw);
+	send(rtnl_socket, &req, req.nh.nlmsg_len, MSG_DONTWAIT);
+}
+
 struct interface* odhcpd_get_interface_by_index(int ifindex)
 {
 	struct interface *iface;