ip6tnl: introduce ip6 tunnel support

This patch adds support for ip6 tunnel that works with the ip6_tunnel kernel module. Signed-off-by: Susant Sahani <susant@redhat.com> Signed-off-by: Thomas Haller <thaller@redhat.com>
thom311 · Jun 16, 2014 · 11f9cc0 · 11f9cc0
1 parent cfc57ce
commit 11f9cc0
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Showing 8 changed files with 863 additions and 1 deletion.
diff --git a/doc/route.txt b/doc/route.txt
@@ -1140,6 +1140,65 @@ if((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0)
 rtnl_link_put(link);
 -----
 
+[[link_ip6tnl]]
+==== IP6TNL
+
+[source,c]
+-----
+extern struct rtnl_link *rtnl_link_ip6_tnl_alloc(void);
+extern int rtnl_link_ip6_tnl_add(struct nl_sock *sk, const char *name);
+
+extern int rtnl_link_ip6_tnl_set_link(struct rtnl_link *link,  uint32_t index);
+extern uint32_t rtnl_link_ip6_tnl_get_link(struct rtnl_link *link);
+
+extern int rtnl_link_ip6_tnl_set_local(struct rtnl_link *link, struct in6_addr *);
+extern int rtnl_link_ip6_tnl_get_local(struct rtnl_link *link, struct in6_addr *);
+
+extern int rtnl_link_ip6_tnl_set_remote(struct rtnl_link *link, struct in6_addr *);
+extern int rtnl_link_ip6_tnl_get_remote(struct rtnl_link *link, struct in6_addr *);
+
+extern int rtnl_link_ip6_tnl_set_ttl(struct rtnl_link *link, uint8_t ttl);
+extern uint8_t rtnl_link_ip6_tnl_get_ttl(struct rtnl_link *link);
+
+extern int rtnl_link_ip6_tnl_set_tos(struct rtnl_link *link, uint8_t tos);
+extern uint8_t rtnl_link_ip6_tnl_get_tos(struct rtnl_link *link);
+
+extern int rtnl_link_ip6_tnl_set_encaplimit(struct rtnl_link *link, uint8_t encap_limit);
+extern uint8_t rtnl_link_ip6_tnl_get_encaplimit(struct rtnl_link *link);
+
+extern int rtnl_link_ip6_tnl_set_flags(struct rtnl_link *link, uint32_t flags);
+extern uint32_t rtnl_link_ip6_tnl_get_flags(struct rtnl_link *link);
+
+extern uint32_t rtnl_link_ip6_tnl_get_flowinfo(struct rtnl_link *link);
+extern int rtnl_link_ip6_tnl_set_flowinfo(struct rtnl_link *link, uint32_t flowinfo);
+
+extern int rtnl_link_ip6_tnl_set_proto(struct rtnl_link *link, uint8_t proto);
+extern uint8_t rtnl_link_ip6_tnl_get_proto(struct rtnl_link *link);
+
+-----
+
+.Example: Add a ip6tnl tunnel device
+[source,c]
+-----
+struct rtnl_link *link
+struct in6_addr addr
+
+link = rtnl_link_ip6_tnl_alloc();
+
+rtnl_link_set_name(link, "ip6tnl-tun");
+rtnl_link_ip6_tnl_set_link(link, if_index);
+
+inet_pton(AF_INET6, "2607:f0d0:1002:51::4", &addr);
+rtnl_link_ip6_tnl_set_local(link, &addr);
+
+inet_pton(AF_INET6, "2607:f0d0:1002:52::5", &addr);
+rtnl_link_ip6_tnl_set_remote(link, &addr);
+
+rtnl_link_add(sk, link, NLM_F_CREATE);
+rtnl_link_put(link);
+
+-----
+
 
 == Neighbouring
 

diff --git a/include/Makefile.am b/include/Makefile.am
@@ -53,6 +53,7 @@ nobase_libnlinclude_HEADERS = \
 	netlink/route/link/vlan.h \
 	netlink/route/link/vxlan.h \
 	netlink/route/link/veth.h \
+	netlink/route/link/ip6tnl.h
 	netlink/route/link/ipgre.h \
 	netlink/route/link/ipip.h \
 	netlink/route/link/ipvti.h \

diff --git a/include/netlink/route/link/ip6tnl.h b/include/netlink/route/link/ip6tnl.h
@@ -0,0 +1,56 @@
+/*
+ * netlink/route/link/ip6tnl.h		IP6TNL interface
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation version 2.1
+ *	of the License.
+ *
+ * Copyright (c) 2014 Susant Sahani <susant@redhat.com>
+ */
+
+#ifndef NETLINK_LINK_IP6TNL_H_
+#define NETLINK_LINK_IP6TNL_H_
+
+#include <netlink/netlink.h>
+#include <netlink/route/link.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+	extern struct rtnl_link *rtnl_link_ip6_tnl_alloc(void);
+	extern int rtnl_link_ip6_tnl_add(struct nl_sock *sk, const char *name);
+
+	extern int rtnl_link_ip6_tnl_set_link(struct rtnl_link *link,  uint32_t index);
+	extern uint32_t rtnl_link_ip6_tnl_get_link(struct rtnl_link *link);
+
+	extern int rtnl_link_ip6_tnl_set_local(struct rtnl_link *link, struct in6_addr *);
+	extern int rtnl_link_ip6_tnl_get_local(struct rtnl_link *link, struct in6_addr *addr);
+
+	extern int rtnl_link_ip6_tnl_set_remote(struct rtnl_link *link, struct in6_addr *);
+	extern int rtnl_link_ip6_tnl_get_remote(struct rtnl_link *link, struct in6_addr *);
+
+	extern int rtnl_link_ip6_tnl_set_ttl(struct rtnl_link *link, uint8_t ttl);
+	extern uint8_t rtnl_link_ip6_tnl_get_ttl(struct rtnl_link *link);
+
+	extern int rtnl_link_ip6_tnl_set_tos(struct rtnl_link *link, uint8_t tos);
+	extern uint8_t rtnl_link_ip6_tnl_get_tos(struct rtnl_link *link);
+
+	extern int rtnl_link_ip6_tnl_set_encaplimit(struct rtnl_link *link, uint8_t encap_limit);
+	extern uint8_t rtnl_link_ip6_tnl_get_encaplimit(struct rtnl_link *link);
+
+	extern int rtnl_link_ip6_tnl_set_flags(struct rtnl_link *link, uint32_t flags);
+	extern uint32_t rtnl_link_ip6_tnl_get_flags(struct rtnl_link *link);
+
+	extern uint32_t rtnl_link_ip6_tnl_get_flowinfo(struct rtnl_link *link);
+	extern int rtnl_link_ip6_tnl_set_flowinfo(struct rtnl_link *link, uint32_t flowinfo);
+
+	extern int rtnl_link_ip6_tnl_set_proto(struct rtnl_link *link, uint8_t proto);
+	extern uint8_t rtnl_link_ip6_tnl_get_proto(struct rtnl_link *link);
+
+#ifdef _cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/Makefile.am b/lib/Makefile.am
@@ -79,7 +79,8 @@ libnl_route_3_la_SOURCES = \
 	route/link/bridge.c route/link/inet6.c route/link/inet.c \
 	route/link/bonding.c route/link/can.c route/link/macvlan.c \
 	route/link/vxlan.c route/link/veth.c route/link/ipip.c \
-	route/link/ipgre.c route/link/sit.c route/link/ipvti.c\
+	route/link/ipgre.c route/link/sit.c route/link/ipvti.c \
+	route/link/ip6tnl.c \
 	\
 	route/qdisc/blackhole.c route/qdisc/cbq.c route/qdisc/dsmark.c \
 	route/qdisc/fifo.c route/qdisc/htb.c route/qdisc/netem.c \