GRE over IPv6
Refactors the GRE node to work with both IPv4 and IPv6 transports.
Note that this changes the binary configuration API to support both
address families; each address uses the same memory for either
address type and a flag to indicate which is in use.
The CLI and VAT syntax remains unchanged; the code detects whether
an IPv4 or an IPv6 address was given.
Configuration examples:
IPv4 CLI: create gre tunnel src 192.168.1.1 dst 192.168.1.2
IPv6 CLI: create gre tunnel src 2620:124:9000::1 dst 2620:124:9000::2
IPv4 VAT: gre_add_del_tunnel src 192.168.1.1 dst 192.168.1.2
IPv6 VAT: gre_add_del_tunnel src 2620:124:9000::1 dst 2620:124:9000::2
Change-Id: Ica8ee775dc101047fb8cd41617ddc8fafc2741b0
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
diff --git a/src/vnet/gre/gre_api.c b/src/vnet/gre/gre_api.c
index 333838c..ceeb1d4 100644
--- a/src/vnet/gre/gre_api.c
+++ b/src/vnet/gre/gre_api.c
@@ -55,17 +55,17 @@
int rv = 0;
vnet_gre_add_del_tunnel_args_t _a, *a = &_a;
u32 outer_fib_id;
- uword *p;
- ip4_main_t *im = &ip4_main;
+ u32 p;
u32 sw_if_index = ~0;
- p = hash_get (im->fib_index_by_table_id, ntohl (mp->outer_fib_id));
- if (!p)
+ p = fib_table_find (!mp->is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6,
+ ntohl (mp->outer_fib_id));
+ if (p == ~0)
{
rv = VNET_API_ERROR_NO_SUCH_FIB;
goto out;
}
- outer_fib_id = p[0];
+ outer_fib_id = p;
/* Check src & dst are different */
if ((mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 16) == 0) ||
@@ -78,10 +78,19 @@
a->is_add = mp->is_add;
a->teb = mp->teb;
+ a->is_ipv6 = mp->is_ipv6;
/* ip addresses sent in network byte order */
- clib_memcpy (&(a->src), mp->src_address, 4);
- clib_memcpy (&(a->dst), mp->dst_address, 4);
+ if (!mp->is_ipv6)
+ {
+ clib_memcpy (&(a->src.ip4), mp->src_address, 4);
+ clib_memcpy (&(a->dst.ip4), mp->dst_address, 4);
+ }
+ else
+ {
+ clib_memcpy (&(a->src.ip6), mp->src_address, 16);
+ clib_memcpy (&(a->dst.ip6), mp->dst_address, 16);
+ }
a->outer_fib_id = outer_fib_id;
rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
@@ -99,17 +108,30 @@
(gre_tunnel_t * t, unix_shared_memory_queue_t * q, u32 context)
{
vl_api_gre_tunnel_details_t *rmp;
- ip4_main_t *im = &ip4_main;
+ u8 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
+ fib_table_t *ft;
rmp = vl_msg_api_alloc (sizeof (*rmp));
memset (rmp, 0, sizeof (*rmp));
rmp->_vl_msg_id = ntohs (VL_API_GRE_TUNNEL_DETAILS);
- clib_memcpy (rmp->src_address, &(t->tunnel_src), 4);
- clib_memcpy (rmp->dst_address, &(t->tunnel_dst), 4);
- rmp->outer_fib_id = htonl (im->fibs[t->outer_fib_index].ft_table_id);
+ if (!is_ipv6)
+ {
+ clib_memcpy (rmp->src_address, &(t->tunnel_src.ip4.as_u8), 4);
+ clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip4.as_u8), 4);
+ ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP4);
+ rmp->outer_fib_id = ft->ft_table_id;
+ }
+ else
+ {
+ clib_memcpy (rmp->src_address, &(t->tunnel_src.ip6.as_u8), 16);
+ clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip6.as_u8), 16);
+ ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP6);
+ rmp->outer_fib_id = ft->ft_table_id;
+ }
rmp->teb = (GRE_TUNNEL_TYPE_TEB == t->type);
rmp->sw_if_index = htonl (t->sw_if_index);
rmp->context = context;
+ rmp->is_ipv6 = is_ipv6;
vl_msg_api_send_shmem (q, (u8 *) & rmp);
}