vlib_node_registration_t nat44_ed_hairpin_dst_node;
vlib_node_registration_t nat44_ed_hairpin_src_node;
vlib_node_registration_t nat44_ed_hairpinning_node;
+vlib_node_registration_t nat44_ed_in2out_reass_node;
#define foreach_snat_in2out_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
return 0;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ nat_outside_fib_t *outside_fib;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
u32 sw_if_index = fib_entry_get_resolving_interface (fei);
if (sw_if_index == ~0)
{
- fei = fib_table_lookup (sm->outside_fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- sw_if_index = fib_entry_get_resolving_interface (fei);
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ sw_if_index = fib_entry_get_resolving_interface (fei);
+ if (sw_if_index != ~0)
+ break;
+ }
+ }
}
+ if (sw_if_index == ~0)
+ return 1;
+
snat_interface_t *i;
pool_foreach (i, sm->interfaces,
({
&value0))
{
/* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
return 0;
}
else
key0.addr = ip0->src_address;
key0.port = src_port;
key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
+ key0.fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
kv0.key = key0.as_u64;
if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
key0.addr = ip0->dst_address;
key0.port = dst_port;
key0.protocol = proto0;
- key0.fib_index = sm->inside_fib_index;
kv0.key = key0.as_u64;
if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
&value0))
return 0;
}
+int
+nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg)
+{
+ snat_main_t *sm = &snat_main;
+ nat44_is_idle_session_ctx_t *ctx = arg;
+ snat_session_t *s;
+ u64 sess_timeout_time;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+ clib_bihash_kv_8_8_t s_kv;
+
+ s = pool_elt_at_index (tsm->sessions, kv->value);
+ sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
+ if (ctx->now >= sess_timeout_time)
+ {
+ s_kv.key = s->out2in.as_u64;
+ if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0))
+ nat_log_warn ("out2in key del failed");
+
+ snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (!snat_is_session_static (s))
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
ip4_header_t * ip0,
u32 rx_fib_index0,
snat_session_t ** sessionp,
vlib_node_runtime_t * node,
u32 next0,
- u32 thread_index)
+ u32 thread_index,
+ f64 now)
{
snat_user_t *u;
snat_session_t *s;
clib_bihash_kv_8_8_t kv0;
snat_session_key_t key1;
u32 address_index = ~0;
- u32 outside_fib_index;
- uword * p;
udp_header_t * udp0 = ip4_next_header (ip0);
u8 is_sm = 0;
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip0->dst_address.as_u32,
+ },
+ };
+ nat44_is_idle_session_ctx_t ctx0;
if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
{
return SNAT_IN2OUT_NEXT_DROP;
}
- p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id);
- if (! p)
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_OUTSIDE_FIB];
- return SNAT_IN2OUT_NEXT_DROP;
- }
- outside_fib_index = p[0];
-
key1.protocol = key0->protocol;
- u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
- thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
/* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0, 0))
+ if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0, 0, 0))
{
/* Try to create dynamic translation */
if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
else
is_sm = 1;
+ u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
+ thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return SNAT_IN2OUT_NEXT_DROP;
+ }
+
s = nat_session_alloc_or_recycle (sm, u, thread_index);
if (!s)
{
+ nat44_delete_user_with_no_session (sm, u, thread_index);
nat_log_warn ("create NAT session failed");
return SNAT_IN2OUT_NEXT_DROP;
}
s->in2out = *key0;
s->out2in = key1;
s->out2in.protocol = key0->protocol;
- s->out2in.fib_index = outside_fib_index;
+ s->out2in.fib_index = sm->outside_fib_index;
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ break;
+ }
s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
s->ext_host_port = udp0->dst_port;
*sessionp = s;
/* Add to translation hashes */
+ ctx0.now = now;
+ ctx0.thread_index = thread_index;
kv0.key = s->in2out.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
- 1 /* is_add */))
+ if (clib_bihash_add_or_overwrite_stale_8_8 (
+ &sm->per_thread_data[thread_index].in2out, &kv0,
+ nat44_i2o_is_idle_session_cb, &ctx0))
nat_log_notice ("in2out key add failed");
kv0.key = s->out2in.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- 1 /* is_add */))
+ if (clib_bihash_add_or_overwrite_stale_8_8 (
+ &sm->per_thread_data[thread_index].out2in, &kv0,
+ nat44_o2i_is_idle_session_cb, &ctx0))
nat_log_notice ("out2in key add failed");
/* log NAT event */
goto out;
}
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, &s0, node, next0,
+ thread_index, vlib_time_now (sm->vlib_main));
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto out;
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0))
{
if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
IP_PROTOCOL_ICMP, rx_fib_index0)))
return next0;
}
+static inline u32
+snat_icmp_hairpinning (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ int is_ed);
+
static inline u32 icmp_in2out (snat_main_t *sm,
vlib_buffer_t * b0,
ip4_header_t * ip0,
u8 dont_translate;
u32 new_addr0, old_addr0;
u16 old_id0, new_id0;
+ u16 old_checksum0, new_checksum0;
ip_csum_t sum0;
u16 checksum0;
u32 next0_tmp;
if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
goto out;
- sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
- checksum0 = ~ip_csum_fold (sum0);
- if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
+ sum0 = ip_incremental_checksum (0, icmp0,
+ ntohs(ip0->length) - ip4_header_bytes (ip0));
+ checksum0 = ~ip_csum_fold (sum0);
+ if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
}
old_addr0 = ip0->src_address.as_u32;
new_addr0 = ip0->src_address.as_u32 = sm0.addr.as_u32;
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
sum0 = ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
goto out;
}
+ /* update inner destination IP address */
old_addr0 = inner_ip0->dst_address.as_u32;
inner_ip0->dst_address = sm0.addr;
new_addr0 = inner_ip0->dst_address.as_u32;
-
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
dst_address /* changed member */);
icmp0->checksum = ip_csum_fold (sum0);
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address /* changed member */);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
switch (protocol)
{
case SNAT_PROTOCOL_ICMP:
}
}
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ {
+ if (sm->deterministic ||
+ 0 != snat_icmp_hairpinning(sm, b0, ip0, icmp0,
+ sm->endpoint_dependent))
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ }
+
out:
return next0;
}
kv0.key = key0.as_u64;
/* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
new_dst_port0 = sm0.port;
return 0;
}
-static inline void
+static inline u32
snat_icmp_hairpinning (snat_main_t *sm,
vlib_buffer_t * b0,
ip4_header_t * ip0,
icmp46_header_t * icmp0,
int is_ed)
{
- snat_session_key_t key0, sm0;
+ snat_session_key_t key0;
clib_bihash_kv_8_8_t kv0, value0;
- u32 new_dst_addr0 = 0, old_dst_addr0, si, ti = 0;
+ u32 old_dst_addr0, new_dst_addr0;
+ u32 old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ u16 old_checksum0, new_checksum0;
+ u32 si, ti = 0;
ip_csum_t sum0;
snat_session_t *s0;
- int rv;
+ snat_static_mapping_t *m0;
- if (!icmp_is_error_message (icmp0))
+ if (icmp_is_error_message (icmp0))
{
- icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
- u16 icmp_id0 = echo0->identifier;
- key0.addr = ip0->dst_address;
- key0.port = icmp_id0;
- key0.protocol = SNAT_PROTOCOL_ICMP;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
+ ip4_header_t *inner_ip0 = 0;
+ tcp_udp_header_t *l4_header = 0;
- if (sm->num_workers > 1)
- ti = (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
+ inner_ip0 = (ip4_header_t *)((icmp_echo_header_t *)(icmp0+1)+1);
+ l4_header = ip4_next_header (inner_ip0);
+ u32 protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+
+ if (protocol != SNAT_PROTOCOL_TCP && protocol != SNAT_PROTOCOL_UDP)
+ return 1;
- /* Check if destination is in active sessions */
if (is_ed)
{
clib_bihash_kv_16_8_t ed_kv, ed_value;
make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- IP_PROTOCOL_ICMP, sm->outside_fib_index, icmp_id0, 0);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
+ inner_ip0->protocol, sm->outside_fib_index,
+ l4_header->src_port, l4_header->dst_port);
+ if (clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
+ &ed_kv, &ed_value))
+ return 1;
si = ed_value.value;
}
else
{
- rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
+ key0.addr = ip0->dst_address;
+ key0.port = l4_header->src_port;
+ key0.protocol = protocol;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0))
+ return 1;
si = value0.value;
}
- if (rv)
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ /* update inner source IP address */
+ old_addr0 = inner_ip0->src_address.as_u32;
+ inner_ip0->src_address.as_u32 = new_dst_addr0;
+ new_addr0 = inner_ip0->src_address.as_u32;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner source port */
+ old_port0 = l4_header->src_port;
+ l4_header->src_port = s0->in2out.port;
+ new_port0 = l4_header->src_port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
+ src_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ if (!is_ed)
{
- /* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
+ icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
+ u16 icmp_id0 = echo0->identifier;
+ key0.addr = ip0->dst_address;
+ key0.port = icmp_id0;
+ key0.protocol = SNAT_PROTOCOL_ICMP;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (sm->num_workers > 1)
+ ti = (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
+ else
+ ti = sm->num_workers;
+ int rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
+ if (!rv)
{
- new_dst_addr0 = sm0.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ si = value0.value;
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ echo0->identifier = s0->in2out.port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
+ icmp_echo_header_t, identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ goto change_addr;
}
- }
- else
- {
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- echo0->identifier = s0->in2out.port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
- icmp_echo_header_t, identifier);
- icmp0->checksum = ip_csum_fold (sum0);
+ ti = 0;
}
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
- }
- }
+ key0.addr = ip0->dst_address;
+ key0.port = 0;
+ key0.protocol = 0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
+ return 1;
+
+ m0 = pool_elt_at_index (sm->static_mappings, value0.value);
+
+ new_dst_addr0 = m0->local_addr.as_u32;
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = m0->fib_index;
+ }
+change_addr:
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+ }
+ return 0;
}
static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
snat_session_t * s0 = *p_s0;
if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
{
- /* Hairpinning */
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == 0)
- snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent);
/* Accounting */
nat44_session_update_counters (s0, now,
vlib_buffer_length_in_chain (sm->vlib_main, b0));
u32 old_addr, new_addr;
ip_csum_t sum;
- make_sm_kv (&kv, &ip->dst_address, 0, sm->outside_fib_index, 0);
+ make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
return;
/* Hairpinning */
if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
{
+ vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
nat_hairpinning_sm_unknown_proto (sm, b, ip);
- vnet_buffer(b)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
}
return 0;
snat_main_t * sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 stats_node_index;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
stats_node_index = is_slow_path ? snat_in2out_slowpath_node.index :
snat_in2out_node.index;
}
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
+ &s0, node, next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace00;
}
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
}
next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
- &s1, node, next1, thread_index);
+ &s1, node, next1, thread_index, now);
if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
goto trace01;
}
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp1, &sum1);
tcp1->checksum = ip_csum_fold(sum1);
}
else
}
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
+ &s0, node, next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
ip4_header_t * ip0,
u16 sport,
u16 dport,
- u32 proto0)
+ u32 proto0,
+ int is_ed)
{
snat_session_key_t key0, sm0;
snat_session_t * s0;
u16 new_dst_port0, old_dst_port0;
udp_header_t * udp0;
tcp_header_t * tcp0;
+ int rv;
key0.addr = ip0->dst_address;
key0.port = dport;
udp0 = ip4_next_header (ip0);
/* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
new_dst_port0 = sm0.port;
else
ti = sm->num_workers;
- if (!clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, &value0))
+ if (is_ed)
+ {
+ clib_bihash_kv_16_8_t ed_kv, ed_value;
+ make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, sm->outside_fib_index, udp0->dst_port,
+ udp0->src_port);
+ rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
+ &ed_kv, &ed_value);
+ si = ed_value.value;
+ }
+ else
{
+ rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
si = value0.value;
+ }
+ if (!rv)
+ {
s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
new_dst_addr0 = s0->in2out.addr.as_u32;
new_dst_port0 = s0->in2out.port;
u32 pkts_processed = 0;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *per_thread_data =
&sm->per_thread_data[thread_index];
u32 *fragments_to_drop = 0;
goto trace0;
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
+ &s0, node, next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
{
if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
{
- if (nat_ip4_reass_add_fragment (reass0, bi0))
+ if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
nat_log_notice ("maximum fragments per reassembly exceeded");
/* Hairpinning */
nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0);
+ s0->ext_host_port, proto0, 0);
/* Accounting */
nat44_session_update_counters (s0, now,
return 0;
}
+int
+nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void * arg)
+{
+ snat_main_t *sm = &snat_main;
+ nat44_is_idle_session_ctx_t *ctx = arg;
+ snat_session_t *s;
+ u64 sess_timeout_time;
+ nat_ed_ses_key_t ed_key;
+ clib_bihash_kv_16_8_t ed_kv;
+ int i;
+ snat_address_t *a;
+ snat_session_key_t key;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+
+ s = pool_elt_at_index (tsm->sessions, kv->value);
+ sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
+ if (ctx->now >= sess_timeout_time)
+ {
+ if (is_fwd_bypass_session (s))
+ goto delete;
+
+ ed_key.l_addr = s->out2in.addr;
+ ed_key.r_addr = s->ext_host_addr;
+ ed_key.fib_index = s->out2in.fib_index;
+ if (snat_is_unk_proto_session (s))
+ {
+ ed_key.proto = s->in2out.port;
+ ed_key.r_port = 0;
+ ed_key.l_port = 0;
+ }
+ else
+ {
+ ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
+ ed_key.l_port = s->out2in.port;
+ ed_key.r_port = s->ext_host_port;
+ }
+ ed_kv.key[0] = ed_key.as_u64[0];
+ ed_kv.key[1] = ed_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
+ nat_log_warn ("out2in_ed key del failed");
+
+ if (snat_is_unk_proto_session (s))
+ goto delete;
+
+ snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (is_twice_nat_session (s))
+ {
+ for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
+ {
+ key.protocol = s->in2out.protocol;
+ key.port = s->ext_host_nat_port;
+ a = sm->twice_nat_addresses + i;
+ if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
+ {
+ snat_free_outside_address_and_port (sm->twice_nat_addresses,
+ ctx->thread_index, &key);
+ break;
+ }
+ }
+ }
+
+ if (snat_is_session_static (s))
+ goto delete;
+
+ if (s->outside_address_index != ~0)
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+ delete:
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline u32
+icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, icmp46_header_t * icmp0,
+ u32 sw_if_index0, u32 rx_fib_index0,
+ vlib_node_runtime_t * node, u32 next0, f64 now,
+ u32 thread_index, snat_session_t ** p_s0)
+{
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t * s0 = *p_s0;
+ if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
+ {
+ /* Hairpinning */
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (sm->vlib_main, b0));
+ }
+ return next0;
+}
+
static u32
slow_path_ed (snat_main_t *sm,
vlib_buffer_t *b,
snat_session_t ** sessionp,
vlib_node_runtime_t * node,
u32 next,
- u32 thread_index)
+ u32 thread_index,
+ f64 now)
{
snat_session_t *s;
snat_user_t *u;
snat_session_key_t key0, key1;
- u8 lb = 0, is_sm = 0;
+ lb_nat_type_t lb = 0, is_sm = 0;
u32 address_index = ~0;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
u32 proto = ip_proto_to_snat_proto (key->proto);
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = key->r_addr.as_u32,
+ },
+ };
+ nat44_is_idle_session_ctx_t ctx;
if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
{
key0.fib_index = rx_fib_index;
key1.fib_index = sm->outside_fib_index;
/* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb))
+ if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb, 0))
{
/* Try to create dynamic translation */
if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index,
if (!u)
{
nat_log_warn ("create NAT user failed");
+ if (!is_sm)
+ snat_free_outside_address_and_port (sm->addresses,
+ thread_index, &key1);
return SNAT_IN2OUT_NEXT_DROP;
}
- s = nat_session_alloc_or_recycle (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index);
if (!s)
{
+ nat44_delete_user_with_no_session (sm, u, thread_index);
nat_log_warn ("create NAT session failed");
+ if (!is_sm)
+ snat_free_outside_address_and_port (sm->addresses,
+ thread_index, &key1);
return SNAT_IN2OUT_NEXT_DROP;
}
s->out2in = key1;
s->out2in.protocol = key0.protocol;
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ break;
+ }
+
/* Add to lookup tables */
kv->value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, kv, 1))
+ ctx.now = now;
+ ctx.thread_index = thread_index;
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv,
+ nat44_i2o_ed_is_idle_session_cb,
+ &ctx))
nat_log_notice ("in2out-ed key add failed");
- make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, key1.fib_index,
+ make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index,
key1.port, key->r_port);
kv->value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, kv, 1))
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv,
+ nat44_o2i_ed_is_idle_session_cb,
+ &ctx))
nat_log_notice ("out2in-ed key add failed");
*sessionp = s;
key0.protocol = proto;
key0.fib_index = sm->outside_fib_index;
/* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &key1, 1, 0, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &key1, 1, 0, 0, 0, 0))
return 0;
}
else
if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index))
return 1;
}
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s, thread_index);
/* Accounting */
nat44_session_update_counters (s, now,
vlib_buffer_length_in_chain (vm, b));
static_always_inline int
nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
u8 proto, u16 src_port, u16 dst_port,
- u32 thread_index, u32 sw_if_index)
+ u32 thread_index, u32 rx_sw_if_index,
+ u32 tx_sw_if_index)
{
clib_bihash_kv_16_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
snat_interface_t *i;
snat_session_t *s;
+ u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
+ u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
/* src NAT check */
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto,
- sm->outside_fib_index, src_port, dst_port);
+ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
+ src_port, dst_port);
if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
return 1;
/* dst NAT check */
- make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto,
- sm->inside_fib_index, dst_port, src_port);
+ make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
+ dst_port, src_port);
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
{
s = pool_elt_at_index (tsm->sessions, value.value);
/* hairpinning */
pool_foreach (i, sm->output_feature_interfaces,
({
- if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index))
+ if ((nat_interface_is_inside(i)) && (rx_sw_if_index == i->sw_if_index))
return 0;
}));
return 1;
if (vnet_buffer(b)->sw_if_index[VLIB_TX] != ~0)
{
if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(sm, ip,
- key.proto, key.l_port, key.r_port, thread_index, sw_if_index)))
+ key.proto, key.l_port, key.r_port, thread_index, sw_if_index,
+ vnet_buffer(b)->sw_if_index[VLIB_TX])))
{
dont_translate = 1;
goto out;
}
next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
- thread_index);
+ thread_index, vlib_time_now (sm->vlib_main));
if (PREDICT_FALSE (next == SNAT_IN2OUT_NEXT_DROP))
goto out;
sm->outside_fib_index, 0, 0);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
{
- make_sm_kv (&kv, &ip->dst_address, 0, sm->outside_fib_index, 0);
+ make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
return;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 elt_index, head_index, ses_index;
snat_session_t * s;
- u32 address_index = ~0;
+ u32 address_index = ~0, outside_fib_index = sm->outside_fib_index;
int i;
u8 is_sm = 0;
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip->dst_address.as_u32,
+ },
+ };
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ outside_fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ outside_fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ outside_fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ break;
+ }
old_addr = ip->src_address.as_u32;
make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol,
address_index = s->outside_address_index;
make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address,
- ip->protocol, sm->outside_fib_index, 0, 0);
+ ip->protocol, outside_fib_index, 0, 0);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
goto create_ses;
for (i = 0; i < vec_len (sm->addresses); i++)
{
make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address,
- ip->protocol, sm->outside_fib_index, 0, 0);
+ ip->protocol, outside_fib_index, 0, 0);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
{
new_addr = ip->src_address.as_u32 =
}
create_ses:
- s = nat_session_alloc_or_recycle (sm, u, thread_index);
+ s = nat_ed_session_alloc (sm, u, thread_index);
if (!s)
{
+ nat44_delete_user_with_no_session (sm, u, thread_index);
nat_log_warn ("create NAT session failed");
return 0;
}
s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
s->outside_address_index = address_index;
s->out2in.addr.as_u32 = new_addr;
- s->out2in.fib_index = sm->outside_fib_index;
+ s->out2in.fib_index = outside_fib_index;
s->in2out.addr.as_u32 = old_addr;
s->in2out.fib_index = rx_fib_index;
s->in2out.port = s->out2in.port = ip->protocol;
nat_log_notice ("in2out key add failed");
make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
- sm->outside_fib_index, 0, 0);
+ outside_fib_index, 0, 0);
s_kv.value = s - tsm->sessions;
if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
nat_log_notice ("out2in key add failed");
/* Accounting */
nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s, thread_index);
/* Hairpinning */
if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
nat44_ed_hairpinning_unknown_proto(sm, b, ip);
if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+ vnet_buffer(b)->sw_if_index[VLIB_TX] = outside_fib_index;
return s;
}
snat_in2out_next_t next_index;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
stats_node_index = is_slow_path ? nat44_ed_in2out_slowpath_node.index :
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- next0 = icmp_in2out_slow_path
+ next0 = icmp_in2out_ed_slow_path
(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
next0, now, thread_index, &s0);
goto trace00;
}
else
{
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace00;
+ }
+
if (is_output_feature)
{
if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
goto trace00;
}
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
}
make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
{
if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0)))
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer(b0)->sw_if_index[VLIB_TX])))
goto trace00;
}
else
}
next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index);
+ next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace00;
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace00;
/* Accounting */
nat44_session_update_counters (s0, now,
vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
trace00:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
{
- next1 = icmp_in2out_slow_path
+ next1 = icmp_in2out_ed_slow_path
(sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
next1, now, thread_index, &s1);
goto trace01;
}
else
{
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace01;
+ }
+
if (is_output_feature)
{
if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
goto trace01;
}
- if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- b1->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next1 = SNAT_IN2OUT_NEXT_DROP;
- goto trace01;
- }
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
}
make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address, ip1->protocol,
{
if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
sm, ip1, ip1->protocol, udp1->src_port,
- udp1->dst_port, thread_index, sw_if_index1)))
+ udp1->dst_port, thread_index, sw_if_index1,
+ vnet_buffer(b1)->sw_if_index[VLIB_TX])))
goto trace01;
}
else
}
next1 = slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
- next1, thread_index);
+ next1, thread_index, now);
if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
goto trace01;
ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
}
tcp1->checksum = ip_csum_fold(sum1);
+ mss_clamping (sm, tcp1, &sum1);
if (nat44_set_tcp_session_state_i2o (sm, s1, tcp1, thread_index))
goto trace01;
}
/* Accounting */
nat44_session_update_counters (s1, now,
vlib_buffer_length_in_chain (vm, b1));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
trace01:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- next0 = icmp_in2out_slow_path
+ next0 = icmp_in2out_ed_slow_path
(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
next0, now, thread_index, &s0);
goto trace0;
}
else
{
- if (is_output_feature)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
}
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ if (ip4_is_fragment (ip0))
{
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ next0 = SNAT_IN2OUT_NEXT_REASS;
goto trace0;
}
- if (ip4_is_fragment (ip0))
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
+ sm, ip0, thread_index, now, vm, b0)))
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next0 = SNAT_IN2OUT_NEXT_DROP;
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
goto trace0;
}
}
{
if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0)))
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer(b0)->sw_if_index[VLIB_TX])))
goto trace0;
}
else
}
next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index);
+ next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace0;
/* Accounting */
nat44_session_update_counters (s0, now,
vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
trace0:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass-output",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_slowpath_node,
nat44_ed_in2out_output_slow_path_fn);
+static inline uword
+nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next;
+ snat_in2out_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ u32 iph_offset0 = 0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0 = 0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t * udp0;
+ tcp_header_t * tcp0;
+ icmp46_header_t * icmp0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ snat_session_t * s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag(0)))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
+ sm, ip0, thread_index, now, vm, b0)))
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ goto trace0;
+ }
+
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+
+ if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP))
+ {
+ if (s0)
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ else
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+
+ goto trace0;
+ }
+
+ make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
+ rx_fib_index0, udp0->src_port, udp0->dst_port);
+
+ if (clib_bihash_search_16_8 (&per_thread_data->in2out_ed, &kv0, &value0))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
+ sm, ip0, ip0->protocol, udp0->src_port,
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer(b0)->sw_if_index[VLIB_TX])))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
+ sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+
+ next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
+ goto trace0;
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
+ {
+ if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
+ nat_log_notice ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */,
+ length /* changed member */);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->dst_port,
+ s0->ext_host_port, ip4_header_t,
+ length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold(sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ }
+ }
+
+ /* Hairpinning */
+ if (PREDICT_TRUE(proto0 != SNAT_PROTOCOL_ICMP))
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 1);
+ else
+ snat_icmp_hairpinning(sm, b0, ip0, icmp0, 1);
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+
+ trace0:
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_in2out_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len - VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, nat44_in2out_reass_node.index,
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
+ SNAT_IN2OUT_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_ed_in2out_reass_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0);
+}
+
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = {
+ .function = nat44_ed_in2out_reass_node_fn,
+ .name = "nat44-ed-in2out-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_in2out_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_node,
+ nat44_ed_in2out_reass_node_fn);
+
+static uword
+nat44_ed_in2out_reass_output_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1);
+}
+
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = {
+ .function = nat44_ed_in2out_reass_output_node_fn,
+ .name = "nat44-ed-in2out-reass-output",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_in2out_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_output_node,
+ nat44_ed_in2out_reass_output_node_fn);
+
/**************************/
/*** deterministic mode ***/
/**************************/
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
u32 now = (u32) vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp1, &sum1);
tcp1->checksum = ip_csum_fold(sum1);
}
else
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
u32 n_left_to_next_worker = 0, *to_next_worker = 0;
u32 next_worker_index = 0;
u32 current_worker_index = ~0;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
u32 fq_index;
u32 to_node_index;
vlib_frame_t *d = 0;
}
m_key.addr.as_u32 = dst_addr->as_u32;
- m_key.fib_index = sm->outside_fib_index;
+ m_key.fib_index = 0;
m_key.port = 0;
m_key.protocol = 0;
kv.key = m_key.as_u64;
key0.port = udp0->src_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0, 0, 0))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0= SNAT_IN2OUT_NEXT_DROP;
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
ip4_header_t,
dst_address /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
}
Code Review / vpp.git / blobdiff