X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=blobdiff_plain;f=src%2Fodhcpd.c;h=9c7f27c4f4ac43b206e8030a05fae44ddba27e2b;hp=52bca13c4db7019a2ccbaee44c6ed88fa30ae022;hb=a3d1f5148222174f12ea8df0c20a554fc5eaabab;hpb=73a7133b6e42edc218da5b8011c580ed48c7731a

diff --git a/src/odhcpd.c b/src/odhcpd.c
index 52bca13..9c7f27c 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -113,11 +113,11 @@ int odhcpd_open_rtnl(void)
 
 
 // Read IPv6 MTU for interface
-int odhcpd_get_interface_mtu(const char *ifname)
+int odhcpd_get_interface_config(const char *ifname, const char *what)
 {
 	char buf[64];
-	const char *sysctl_pattern = "/proc/sys/net/ipv6/conf/%s/mtu";
-	snprintf(buf, sizeof(buf), sysctl_pattern, ifname);
+	const char *sysctl_pattern = "/proc/sys/net/ipv6/conf/%s/%s";
+	snprintf(buf, sizeof(buf), sysctl_pattern, ifname, what);
 
 	int fd = open(buf, O_RDONLY);
 	ssize_t len = read(fd, buf, sizeof(buf) - 1);
@@ -126,10 +126,8 @@ int odhcpd_get_interface_mtu(const char *ifname)
 	if (len < 0)
 		return -1;
 
-
 	buf[len] = 0;
 	return atoi(buf);
-
 }
 
 
@@ -176,12 +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));
 
@@ -262,24 +254,71 @@ ssize_t odhcpd_get_interface_addresses(int ifindex,
 	return ret;
 }
 
-int odhcpd_get_preferred_interface_address(int ifindex, struct in6_addr *addr)
+int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
 {
-	struct odhcpd_ipaddr ipaddrs[8];
-	ssize_t ip_cnt = odhcpd_get_interface_addresses(ifindex, ipaddrs, ARRAY_SIZE(ipaddrs));
-	uint32_t preferred = 0;
-	int ret = 0;
-
-	for (ssize_t i = 0; i < ip_cnt; i++) {
-		struct odhcpd_ipaddr *ipaddr = &ipaddrs[i];
-
-		if (ipaddr->preferred > preferred || !preferred) {
-			preferred = ipaddr->preferred;
-			*addr = ipaddr->addr;
-			ret = 1;
+		int status = -1;
+		struct sockaddr_in6 addr = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, ifindex};
+		socklen_t alen = sizeof(addr);
+		int sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+
+		if (!connect(sock, (struct sockaddr*)&addr, sizeof(addr)) &&
+				!getsockname(sock, (struct sockaddr*)&addr, &alen)) {
+			*lladdr = addr.sin6_addr;
+			status = 0;
 		}
+
+		close(sock);
+		return status;
+}
+
+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;
 	}
 
-	return ret;
+	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)