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authorMatus Fabian <matfabia@cisco.com>2017-06-21 06:15:18 -0700
committerOle Trøan <otroan@employees.org>2017-06-21 16:27:41 +0000
commit428dc9110bee7eedf8aac6f12a89181e8e5343f5 (patch)
treea24e6acb6db074054286f18dd11ac96df96c2832 /src/plugins/snat/nat64_out2in.c
parent793fe2179c2403af330409f7e7d34bb0f7910b99 (diff)
NAT64: custom prefix
Change-Id: If397b49861468eed29b964fa64b186f80eb0eceb Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/snat/nat64_out2in.c')
-rw-r--r--src/plugins/snat/nat64_out2in.c40
1 files changed, 11 insertions, 29 deletions
diff --git a/src/plugins/snat/nat64_out2in.c b/src/plugins/snat/nat64_out2in.c
index 0a5fbe5b357..755aa638aa5 100644
--- a/src/plugins/snat/nat64_out2in.c
+++ b/src/plugins/snat/nat64_out2in.c
@@ -21,15 +21,6 @@
#include <vnet/ip/ip4_to_ip6.h>
#include <vnet/fib/ip4_fib.h>
-/* *INDENT-OFF* */
-static u8 well_known_prefix[] = {
- 0x00, 0x64, 0xff, 0x9b,
- 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00
-};
-/* *INDENT-ON* */
-
typedef struct
{
u32 sw_if_index;
@@ -112,9 +103,6 @@ nat64_out2in_tcp_udp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
memset (&daddr, 0, sizeof (daddr));
daddr.ip4.as_u32 = ip4->dst_address.as_u32;
- memcpy (&ip6_saddr, well_known_prefix, sizeof (ip6_saddr));
- ip6_saddr.as_u32[3] = ip4->src_address.as_u32;
-
ste =
nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto,
fib_index, 0);
@@ -132,6 +120,7 @@ nat64_out2in_tcp_udp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
if (!bibe)
return -1;
+ nat64_compose_ip6 (&ip6_saddr, &ip4->src_address, bibe->fib_index);
ste =
nat64_db_st_entry_create (&nm->db, bibe, &ip6_saddr, &saddr.ip4,
sport);
@@ -139,8 +128,8 @@ nat64_out2in_tcp_udp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
nat64_session_reset_timeout (ste, ctx->vm);
- ip6->src_address.as_u64[0] = ip6_saddr.as_u64[0];
- ip6->src_address.as_u64[1] = ip6_saddr.as_u64[1];
+ ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0];
+ ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1];
ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
@@ -179,9 +168,6 @@ nat64_out2in_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
memset (&daddr, 0, sizeof (daddr));
daddr.ip4.as_u32 = ip4->dst_address.as_u32;
- memcpy (&ip6_saddr, well_known_prefix, sizeof (ip6_saddr));
- ip6_saddr.as_u32[3] = ip4->src_address.as_u32;
-
if (icmp->type == ICMP6_echo_request || icmp->type == ICMP6_echo_reply)
{
u16 out_id = ((u16 *) (icmp))[2];
@@ -205,6 +191,7 @@ nat64_out2in_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
if (!bibe)
return -1;
+ nat64_compose_ip6 (&ip6_saddr, &ip4->src_address, bibe->fib_index);
ste =
nat64_db_st_entry_create (&nm->db, bibe, &ip6_saddr, &saddr.ip4,
0);
@@ -212,8 +199,8 @@ nat64_out2in_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
nat64_session_reset_timeout (ste, ctx->vm);
- ip6->src_address.as_u64[0] = ip6_saddr.as_u64[0];
- ip6->src_address.as_u64[1] = ip6_saddr.as_u64[1];
+ ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0];
+ ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1];
ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
@@ -225,8 +212,8 @@ nat64_out2in_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
{
ip6_header_t *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
- ip6->src_address.as_u64[0] = ip6_saddr.as_u64[0];
- ip6->src_address.as_u64[1] = ip6_saddr.as_u64[1];
+ nat64_compose_ip6 (&ip6->src_address, &ip4->src_address,
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX]);
ip6->dst_address.as_u64[0] = inner_ip6->src_address.as_u64[0];
ip6->dst_address.as_u64[1] = inner_ip6->src_address.as_u64[1];
}
@@ -243,7 +230,6 @@ nat64_out2in_inner_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
nat64_db_bib_entry_t *bibe;
nat64_db_st_entry_t *ste;
ip46_address_t saddr, daddr;
- ip6_address_t ip6_daddr;
u32 sw_if_index, fib_index;
snat_protocol_t proto = ip_proto_to_snat_proto (ip4->protocol);
@@ -256,9 +242,6 @@ nat64_out2in_inner_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
memset (&daddr, 0, sizeof (daddr));
daddr.ip4.as_u32 = ip4->dst_address.as_u32;
- memcpy (&ip6_daddr, well_known_prefix, sizeof (ip6_daddr));
- ip6_daddr.as_u32[3] = ip4->dst_address.as_u32;
-
if (proto == SNAT_PROTOCOL_ICMP)
{
icmp46_header_t *icmp = ip4_next_header (ip4);
@@ -279,8 +262,8 @@ nat64_out2in_inner_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
if (!bibe)
return -1;
- ip6->dst_address.as_u64[0] = ip6_daddr.as_u64[0];
- ip6->dst_address.as_u64[1] = ip6_daddr.as_u64[1];
+ ip6->dst_address.as_u64[0] = ste->in_r_addr.as_u64[0];
+ ip6->dst_address.as_u64[1] = ste->in_r_addr.as_u64[1];
ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
((u16 *) (icmp))[2] = bibe->in_port;
@@ -306,8 +289,7 @@ nat64_out2in_inner_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6,
if (!bibe)
return -1;
- ip6->dst_address.as_u64[0] = ip6_daddr.as_u64[0];
- ip6->dst_address.as_u64[1] = ip6_daddr.as_u64[1];
+ nat64_compose_ip6 (&ip6->dst_address, &daddr.ip4, bibe->fib_index);
ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
udp->src_port = bibe->in_port;