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authorKlement Sekera <ksekera@cisco.com>2019-10-10 09:46:06 +0000
committerOle Trøan <otroan@employees.org>2020-01-03 10:10:15 +0000
commitf126e746fc01c75bc99329d10ce9127b26b23814 (patch)
treefaf9f09a363add6e140f30e25187b330843b3d21 /src/plugins/nat/nat64.c
parent3535501b19aec95dfd32870c784f841f57b5c045 (diff)
nat: use SVR
Remove NAT's implementation of shallow virtual reassembly with corresponding CLIs, APIs & tests. Replace with standalone shallow virtual reassembly provided by ipX-sv-reass* nodes. Type: refactor Change-Id: I7e6c7487a5a500d591f6871474a359e0993e59b6 Signed-off-by: Klement Sekera <ksekera@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat64.c')
-rw-r--r--src/plugins/nat/nat64.c69
1 files changed, 24 insertions, 45 deletions
diff --git a/src/plugins/nat/nat64.c b/src/plugins/nat/nat64.c
index e1afea6510e..405fc84c7b8 100644
--- a/src/plugins/nat/nat64.c
+++ b/src/plugins/nat/nat64.c
@@ -19,10 +19,11 @@
#include <nat/nat64.h>
#include <nat/nat64_db.h>
-#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
#include <vnet/fib/ip4_fib.h>
#include <vppinfra/crc32.h>
+#include <vnet/ip/reass/ip4_sv_reass.h>
+#include <vnet/ip/reass/ip6_sv_reass.h>
nat64_main_t nat64_main;
@@ -34,21 +35,25 @@ VNET_FEATURE_INIT (nat64_in2out, static) = {
.arc_name = "ip6-unicast",
.node_name = "nat64-in2out",
.runs_before = VNET_FEATURES ("ip6-lookup"),
+ .runs_after = VNET_FEATURES ("ip6-sv-reassembly-feature"),
};
VNET_FEATURE_INIT (nat64_out2in, static) = {
.arc_name = "ip4-unicast",
.node_name = "nat64-out2in",
.runs_before = VNET_FEATURES ("ip4-lookup"),
+ .runs_after = VNET_FEATURES ("ip4-sv-reassembly-feature"),
};
VNET_FEATURE_INIT (nat64_in2out_handoff, static) = {
.arc_name = "ip6-unicast",
.node_name = "nat64-in2out-handoff",
.runs_before = VNET_FEATURES ("ip6-lookup"),
+ .runs_after = VNET_FEATURES ("ip6-sv-reassembly-feature"),
};
VNET_FEATURE_INIT (nat64_out2in_handoff, static) = {
.arc_name = "ip4-unicast",
.node_name = "nat64-out2in-handoff",
.runs_before = VNET_FEATURES ("ip4-lookup"),
+ .runs_after = VNET_FEATURES ("ip4-sv-reassembly-feature"),
};
@@ -120,7 +125,7 @@ nat64_get_worker_in2out (ip6_address_t * addr)
}
u32
-nat64_get_worker_out2in (ip4_header_t * ip)
+nat64_get_worker_out2in (vlib_buffer_t * b, ip4_header_t * ip)
{
nat64_main_t *nm = &nat64_main;
snat_main_t *sm = nm->sm;
@@ -132,41 +137,6 @@ nat64_get_worker_out2in (ip4_header_t * ip)
udp = ip4_next_header (ip);
port = udp->dst_port;
- /* fragments */
- if (PREDICT_FALSE (ip4_is_fragment (ip)))
- {
- if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
- return vlib_get_thread_index ();
-
- nat_reass_ip4_t *reass;
- reass = nat_ip4_reass_find (ip->src_address, ip->dst_address,
- ip->fragment_id, ip->protocol);
-
- if (reass && (reass->thread_index != (u32) ~ 0))
- return reass->thread_index;
-
- if (ip4_is_first_fragment (ip))
- {
- reass =
- nat_ip4_reass_create (ip->src_address, ip->dst_address,
- ip->fragment_id, ip->protocol);
- if (!reass)
- goto no_reass;
-
- port = clib_net_to_host_u16 (port);
- if (port > 1024)
- reass->thread_index =
- nm->sm->first_worker_index +
- ((port - 1024) / sm->port_per_thread);
- else
- reass->thread_index = vlib_get_thread_index ();
- return reass->thread_index;
- }
- else
- return vlib_get_thread_index ();
- }
-
-no_reass:
/* unknown protocol */
if (PREDICT_FALSE (proto == ~0))
{
@@ -193,10 +163,12 @@ no_reass:
{
icmp46_header_t *icmp = (icmp46_header_t *) udp;
icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
- if (!icmp_is_error_message (icmp))
- port = echo->identifier;
+ if (!icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
+ port = vnet_buffer (b)->ip.reass.l4_src_port;
else
{
+ /* if error message, then it's not fragmented and we can access it */
ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
proto = ip_proto_to_snat_proto (inner_ip->protocol);
void *l4_header = ip4_next_header (inner_ip);
@@ -249,15 +221,9 @@ nat64_init (vlib_main_t * vm)
node = vlib_get_node_by_name (vm, (u8 *) "nat64-in2out-slowpath");
nm->in2out_slowpath_node_index = node->index;
- node = vlib_get_node_by_name (vm, (u8 *) "nat64-in2out-reass");
- nm->in2out_reass_node_index = node->index;
-
node = vlib_get_node_by_name (vm, (u8 *) "nat64-out2in");
nm->out2in_node_index = node->index;
- node = vlib_get_node_by_name (vm, (u8 *) "nat64-out2in-reass");
- nm->out2in_reass_node_index = node->index;
-
/* set session timeouts to default values */
nm->udp_timeout = SNAT_UDP_TIMEOUT;
nm->icmp_timeout = SNAT_ICMP_TIMEOUT;
@@ -528,6 +494,19 @@ nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
arc_name = is_inside ? "ip6-unicast" : "ip4-unicast";
+ if (is_inside)
+ {
+ int rv = ip6_sv_reass_enable_disable_with_refcnt (sw_if_index, is_add);
+ if (rv)
+ return rv;
+ }
+ else
+ {
+ int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, is_add);
+ if (rv)
+ return rv;
+ }
+
return vnet_feature_enable_disable (arc_name, feature_name, sw_if_index,
is_add, 0, 0);
}