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path: root/src/plugins/snat/out2in.c
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Diffstat (limited to 'src/plugins/snat/out2in.c')
-rw-r--r--src/plugins/snat/out2in.c140
1 files changed, 125 insertions, 15 deletions
diff --git a/src/plugins/snat/out2in.c b/src/plugins/snat/out2in.c
index 5c12b473c63..cba42465e91 100644
--- a/src/plugins/snat/out2in.c
+++ b/src/plugins/snat/out2in.c
@@ -137,6 +137,9 @@ create_session_for_static_mapping (snat_main_t *sm,
clib_bihash_kv_8_8_t kv0, value0;
dlist_elt_t * per_user_translation_list_elt;
dlist_elt_t * per_user_list_head_elt;
+ ip4_header_t *ip0;
+
+ ip0 = vlib_buffer_get_current (b0);
user_key.addr = in2out.addr;
user_key.fib_index = in2out.fib_index;
@@ -180,6 +183,7 @@ create_session_for_static_mapping (snat_main_t *sm,
s->outside_address_index = ~0;
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
u->nstaticsessions++;
/* Create list elts */
@@ -615,31 +619,134 @@ static void
snat_out2in_unknown_proto (snat_main_t *sm,
vlib_buffer_t * b,
ip4_header_t * ip,
- u32 rx_fib_index)
+ u32 rx_fib_index,
+ u32 thread_index,
+ f64 now,
+ vlib_main_t * vm)
{
clib_bihash_kv_8_8_t kv, value;
+ clib_bihash_kv_16_8_t s_kv, s_value;
snat_static_mapping_t *m;
snat_session_key_t m_key;
u32 old_addr, new_addr;
ip_csum_t sum;
+ snat_unk_proto_ses_key_t key;
+ snat_session_t * s;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ snat_user_key_t u_key;
+ snat_user_t *u;
+ dlist_elt_t *head, *elt;
- m_key.addr = ip->dst_address;
- m_key.port = 0;
- m_key.protocol = 0;
- m_key.fib_index = rx_fib_index;
- kv.key = m_key.as_u64;
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return;
+ old_addr = ip->dst_address.as_u32;
- m = pool_elt_at_index (sm->static_mappings, value.value);
+ key.l_addr = ip->dst_address;
+ key.r_addr = ip->src_address;
+ key.fib_index = rx_fib_index;
+ key.proto = ip->protocol;
+ key.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 0;
+ s_kv.key[0] = key.as_u64[0];
+ s_kv.key[1] = key.as_u64[1];
- old_addr = ip->dst_address.as_u32;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+ if (!clib_bihash_search_16_8 (&sm->out2in_unk_proto, &s_kv, &s_value))
+ {
+ s = pool_elt_at_index (tsm->sessions, s_value.value);
+ new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ }
+ else
+ {
+ m_key.addr = ip->dst_address;
+ m_key.port = 0;
+ m_key.protocol = 0;
+ m_key.fib_index = rx_fib_index;
+ kv.key = m_key.as_u64;
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ return;
+
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+
+ u_key.addr = ip->src_address;
+ u_key.fib_index = m->fib_index;
+ kv.key = u_key.as_u64;
+
+ /* Ever heard of the "user" = src ip4 address before? */
+ if (clib_bihash_search_8_8 (&sm->user_hash, &kv, &value))
+ {
+ /* no, make a new one */
+ pool_get (tsm->users, u);
+ memset (u, 0, sizeof (*u));
+ u->addr = ip->src_address;
+ u->fib_index = rx_fib_index;
+
+ pool_get (tsm->list_pool, head);
+ u->sessions_per_user_list_head_index = head - tsm->list_pool;
+
+ clib_dlist_init (tsm->list_pool,
+ u->sessions_per_user_list_head_index);
+
+ kv.value = u - tsm->users;
+
+ /* add user */
+ clib_bihash_add_del_8_8 (&sm->user_hash, &kv, 1);
+ }
+ else
+ {
+ u = pool_elt_at_index (tsm->users, value.value);
+ }
+
+ /* Create a new session */
+ pool_get (tsm->sessions, s);
+ memset (s, 0, sizeof (*s));
+
+ s->ext_host_addr.as_u32 = ip->src_address.as_u32;
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ s->outside_address_index = ~0;
+ s->out2in.addr.as_u32 = old_addr;
+ s->out2in.fib_index = rx_fib_index;
+ s->in2out.addr.as_u32 = new_addr;
+ s->in2out.fib_index = m->fib_index;
+ s->in2out.port = s->out2in.port = ip->protocol;
+ u->nstaticsessions++;
+
+ /* Create list elts */
+ pool_get (tsm->list_pool, elt);
+ clib_dlist_init (tsm->list_pool, elt - tsm->list_pool);
+ elt->value = s - tsm->sessions;
+ s->per_user_index = elt - tsm->list_pool;
+ s->per_user_list_head_index = u->sessions_per_user_list_head_index;
+ clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
+ s->per_user_index);
+
+ /* Add to lookup tables */
+ s_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto, &s_kv, 1))
+ clib_warning ("out2in key add failed");
+
+ key.l_addr = ip->dst_address;
+ key.fib_index = m->fib_index;
+ s_kv.key[0] = key.as_u64[0];
+ s_kv.key[1] = key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto, &s_kv, 1))
+ clib_warning ("in2out key add failed");
+ }
+
+ /* Update IP checksum */
sum = ip->checksum;
sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
ip->checksum = ip_csum_fold (sum);
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
+ vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+
+ /* Accounting */
+ s->last_heard = now;
+ s->total_pkts++;
+ s->total_bytes += vlib_buffer_length_in_chain (vm, b);
+ /* Per-user LRU list maintenance */
+ clib_dlist_remove (tsm->list_pool, s->per_user_index);
+ clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
+ s->per_user_index);
}
static uword
@@ -735,7 +842,8 @@ snat_out2in_node_fn (vlib_main_t * vm,
if (PREDICT_FALSE (proto0 == ~0))
{
- snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0);
+ snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm);
goto trace0;
}
@@ -873,7 +981,8 @@ snat_out2in_node_fn (vlib_main_t * vm,
if (PREDICT_FALSE (proto1 == ~0))
{
- snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1);
+ snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
+ thread_index, now, vm);
goto trace1;
}
@@ -1035,7 +1144,8 @@ snat_out2in_node_fn (vlib_main_t * vm,
if (PREDICT_FALSE (proto0 == ~0))
{
- snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0);
+ snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm);
goto trace00;
}