u32 fib_index;
clib_bihash_kv_16_8_t ed_kv;
int i;
- snat_address_t *a;
- snat_session_key_t key;
+ //snat_address_t *a;
snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
ctx->thread_index);
}
else
{
- proto = nat_proto_to_ip_proto (s->in2out.protocol);
+ proto = nat_proto_to_ip_proto (s->nat_proto);
l_port = s->in2out.port;
r_port = s->ext_host_port;
}
r_addr = &s->ext_host_nat_addr;
r_port = s->ext_host_nat_port;
}
- make_ed_kv (l_addr, r_addr, proto, fib_index, l_port, r_port, ~0, ~0,
- &ed_kv);
+ init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto);
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
nat_elog_warn ("in2out_ed key del failed");
snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
s->in2out.addr.as_u32,
s->out2in.addr.as_u32,
- s->in2out.protocol,
+ s->nat_proto,
s->in2out.port,
s->out2in.port,
s->in2out.fib_index);
&s->ext_host_nat_addr, s->ext_host_nat_port,
&s->out2in.addr, s->out2in.port,
&s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, is_twice_nat_session (s));
+ s->nat_proto, is_twice_nat_session (s));
nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
- s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
+ s->ext_host_port, s->nat_proto, s->out2in.fib_index,
ctx->thread_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;
- }
+ // FIXME TODO this is obviously wrong code ... needs fix!
+ // key.protocol = s->nat_proto;
+ // 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;
+ // }
}
}
goto delete;
snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
+ &s->out2in.addr, s->out2in.port,
+ s->nat_proto);
delete:
nat_ed_session_delete (sm, s, ctx->thread_index, 1);
return 1;
}
#endif
+// allocate exact address based on preference
+static_always_inline int
+nat_alloc_addr_and_port_exact (snat_address_t * a,
+ u32 thread_index,
+ nat_protocol_t proto,
+ ip4_address_t * addr,
+ u16 * port,
+ u16 port_per_thread, u32 snat_thread_index)
+{
+ u32 portnum;
+
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case NAT_PROTOCOL_##N: \
+ if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
+ { \
+ while (1) \
+ { \
+ portnum = (port_per_thread * \
+ snat_thread_index) + \
+ snat_random_port(0, port_per_thread - 1) + 1024; \
+ if (a->busy_##n##_port_refcounts[portnum]) \
+ continue; \
+ --a->busy_##n##_port_refcounts[portnum]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ *addr = a->addr; \
+ *port = clib_host_to_net_u16(portnum); \
+ return 0; \
+ } \
+ } \
+ break;
+ foreach_nat_protocol
+#undef _
+ default:
+ nat_elog_info ("unknown protocol");
+ return 1;
+ }
+
+ /* Totally out of translations to use... */
+ snat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ return 1;
+}
+
+
static snat_session_t *
create_session_for_static_mapping_ed (snat_main_t * sm,
vlib_buffer_t * b,
- snat_session_key_t l_key,
- snat_session_key_t e_key,
+ ip4_address_t i2o_addr,
+ u16 i2o_port,
+ u32 i2o_fib_index,
+ ip4_address_t o2i_addr,
+ u16 o2i_port,
+ u32 o2i_fib_index,
+ nat_protocol_t nat_proto,
vlib_node_runtime_t * node,
u32 rx_fib_index,
u32 thread_index,
twice_nat_type_t twice_nat,
- lb_nat_type_t lb_nat, f64 now)
+ lb_nat_type_t lb_nat, f64 now,
+ snat_static_mapping_t * mapping)
{
snat_session_t *s;
ip4_header_t *ip;
udp_header_t *udp;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
clib_bihash_kv_16_8_t kv;
- snat_session_key_t eh_key;
nat44_is_idle_session_ctx_t ctx;
if (PREDICT_FALSE
return 0;
}
- s = nat_ed_session_alloc (sm, thread_index, now, e_key.protocol);
+ s = nat_ed_session_alloc (sm, thread_index, now, nat_proto);
if (!s)
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
udp = ip4_next_header (ip);
s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->ext_host_port = e_key.protocol == NAT_PROTOCOL_ICMP ? 0 : udp->src_port;
+ s->ext_host_port = nat_proto == NAT_PROTOCOL_ICMP ? 0 : udp->src_port;
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
if (lb_nat)
s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
if (lb_nat == AFFINITY_LB_NAT)
s->flags |= SNAT_SESSION_FLAG_AFFINITY;
s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->out2in = e_key;
- s->in2out = l_key;
- s->in2out.protocol = s->out2in.protocol;
+ s->out2in.addr = o2i_addr;
+ s->out2in.port = o2i_port;
+ s->out2in.fib_index = o2i_fib_index;
+ s->in2out.addr = i2o_addr;
+ s->in2out.port = i2o_port;
+ s->in2out.fib_index = i2o_fib_index;
+ s->nat_proto = nat_proto;
/* Add to lookup tables */
- make_ed_kv (&e_key.addr, &s->ext_host_addr, ip->protocol,
- e_key.fib_index, e_key.port, s->ext_host_port, thread_index,
- s - tsm->sessions, &kv);
+ init_ed_kv (&kv, o2i_addr, o2i_port, s->ext_host_addr, s->ext_host_port,
+ o2i_fib_index, ip->protocol, thread_index, s - tsm->sessions);
ctx.now = now;
ctx.thread_index = thread_index;
if (clib_bihash_add_or_overwrite_stale_16_8 (&sm->out2in_ed, &kv,
nat_elog_notice ("out2in-ed key add failed");
if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF &&
- ip->src_address.as_u32 == l_key.addr.as_u32))
+ ip->src_address.as_u32 == i2o_addr.as_u32))
{
- eh_key.protocol = e_key.protocol;
- if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
- thread_index, &eh_key,
- sm->port_per_thread,
- tsm->snat_thread_index))
+ int rc = 0;
+ snat_address_t *filter = 0;
+
+ // if exact address is specified use this address
+ if (is_exact_address (mapping))
+ {
+ snat_address_t *ap;
+ vec_foreach (ap, sm->twice_nat_addresses)
+ {
+ if (mapping->pool_addr.as_u32 == ap->addr.as_u32)
+ {
+ filter = ap;
+ break;
+ }
+ }
+ }
+
+ if (filter)
+ {
+ rc = nat_alloc_addr_and_port_exact (filter,
+ thread_index,
+ nat_proto,
+ &s->ext_host_nat_addr,
+ &s->ext_host_nat_port,
+ sm->port_per_thread,
+ tsm->snat_thread_index);
+ s->flags |= SNAT_SESSION_FLAG_EXACT_ADDRESS;
+ }
+ else
+ {
+ rc =
+ snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
+ thread_index, nat_proto,
+ &s->ext_host_nat_addr,
+ &s->ext_host_nat_port,
+ sm->port_per_thread,
+ tsm->snat_thread_index);
+ }
+
+ if (rc)
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS];
nat_ed_session_delete (sm, s, thread_index, 1);
nat_elog_notice ("out2in-ed key del failed");
return 0;
}
- s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32;
- s->ext_host_nat_port = eh_key.port;
+
s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
- make_ed_kv (&l_key.addr, &s->ext_host_nat_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_nat_port,
- thread_index, s - tsm->sessions, &kv);
+ init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_nat_addr,
+ s->ext_host_nat_port, i2o_fib_index, ip->protocol,
+ thread_index, s - tsm->sessions);
}
else
{
- make_ed_kv (&l_key.addr, &s->ext_host_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_port, thread_index,
- s - tsm->sessions, &kv);
+ init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_addr,
+ s->ext_host_port, i2o_fib_index, ip->protocol,
+ thread_index, s - tsm->sessions);
}
if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv,
nat44_i2o_ed_is_idle_session_cb,
snat_ipfix_logging_nat44_ses_create (thread_index,
s->in2out.addr.as_u32,
s->out2in.addr.as_u32,
- s->in2out.protocol,
+ s->nat_proto,
s->in2out.port,
s->out2in.port, s->in2out.fib_index);
&s->ext_host_nat_addr, s->ext_host_nat_port,
&s->out2in.addr, s->out2in.port,
&s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, is_twice_nat_session (s));
+ s->nat_proto, is_twice_nat_session (s));
nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
s->out2in.port, &s->ext_host_addr, s->ext_host_port,
&s->ext_host_nat_addr, s->ext_host_nat_port,
- s->in2out.protocol, s->in2out.fib_index, s->flags,
- thread_index, 0);
+ s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0);
+
+ per_vrf_sessions_register_session (s, thread_index);
return s;
}
clib_bihash_kv_16_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
- rx_fib_index, src_port, dst_port, ~0, ~0, &kv);
+ init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
+ rx_fib_index, ip->protocol);
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
return 1;
l_port = 0;
r_port = 0;
}
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
- rx_fib_index, l_port, r_port, ~0, ~0, &kv);
+ init_ed_k (&kv, ip->dst_address, l_port, ip->src_address, r_port,
+ rx_fib_index, ip->protocol);
}
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
s->out2in.addr = ip->dst_address;
s->out2in.port = l_port;
- s->out2in.protocol = proto;
+ s->nat_proto = proto;
if (proto == NAT_PROTOCOL_OTHER)
{
s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
s->out2in.port = ip->protocol;
}
s->out2in.fib_index = 0;
- s->in2out = s->out2in;
+ s->in2out.addr = s->out2in.addr;
+ s->in2out.port = s->out2in.port;
+ s->in2out.fib_index = s->out2in.fib_index;
kv.value = s - tsm->sessions;
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
nat_elog_notice ("in2out_ed key add failed");
+
+ per_vrf_sessions_register_session (s, thread_index);
}
if (ip->protocol == IP_PROTOCOL_TCP)
#ifndef CLIB_MARCH_VARIANT
u32
icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
- u8 * p_proto, snat_session_key_t * p_value,
- u8 * p_dont_translate, void *d, void *e)
+ u32 thread_index, vlib_buffer_t * b,
+ ip4_header_t * ip, ip4_address_t * addr,
+ u16 * port, u32 * fib_index, nat_protocol_t * proto,
+ void *d, void *e, u8 * dont_translate)
{
u32 next = ~0, sw_if_index, rx_fib_index;
clib_bihash_kv_16_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
snat_session_t *s = 0;
- u8 dont_translate = 0, is_addr_only, identity_nat;
- snat_session_key_t e_key, l_key;
+ u8 is_addr_only, identity_nat;
u16 l_port, r_port;
vlib_main_t *vm = vlib_get_main ();
+ ip4_address_t sm_addr;
+ u16 sm_port;
+ u32 sm_fib_index;
+ *dont_translate = 0;
+ snat_static_mapping_t *m;
sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
if (get_icmp_o2i_ed_key
- (b, ip, rx_fib_index, ~0, ~0, p_proto, &l_port, &r_port, &kv))
+ (b, ip, rx_fib_index, ~0, ~0, proto, &l_port, &r_port, &kv))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
next = NAT_NEXT_DROP;
if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
{
- /* Try to match static mapping */
- e_key.addr = ip->dst_address;
- e_key.port = l_port;
- e_key.protocol = ip_proto_to_nat_proto (ip->protocol);
- e_key.fib_index = rx_fib_index;
if (snat_static_mapping_match
- (sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0, &identity_nat))
+ (sm, ip->dst_address, l_port, rx_fib_index,
+ ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port,
+ &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m))
{
+ // static mapping not matched
if (!sm->forwarding_enabled)
{
/* Don't NAT packet aimed at the intfc address */
if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index,
ip->dst_address.as_u32)))
{
- dont_translate = 1;
- goto out;
+ *dont_translate = 1;
+ }
+ else
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next = NAT_NEXT_DROP;
}
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next = NAT_NEXT_DROP;
- goto out;
}
else
{
- dont_translate = 1;
+ *dont_translate = 1;
if (next_src_nat (sm, ip, l_port, r_port,
thread_index, rx_fib_index))
{
next = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto out;
}
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index);
else
- create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
- goto out;
+ {
+ if (sm->num_workers > 1)
+ create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index);
+ else
+ create_bypass_for_fwd (sm, b, ip, rx_fib_index,
+ thread_index);
+ }
}
+ goto out;
}
if (PREDICT_FALSE
if (PREDICT_FALSE (identity_nat))
{
- dont_translate = 1;
+ *dont_translate = 1;
goto out;
}
/* Create session initiated by host from external network */
- s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node,
- rx_fib_index, thread_index, 0,
- 0, vlib_time_now (vm));
-
+ s =
+ create_session_for_static_mapping_ed (sm, b, sm_addr, sm_port,
+ sm_fib_index, ip->dst_address,
+ l_port, rx_fib_index, *proto,
+ node, rx_fib_index,
+ thread_index, 0, 0,
+ vlib_time_now (vm), m);
if (!s)
- {
- next = NAT_NEXT_DROP;
- goto out;
- }
+ next = NAT_NEXT_DROP;
}
else
{
}
out:
if (s)
- *p_value = s->in2out;
- *p_dont_translate = dont_translate;
+ {
+ *addr = s->in2out.addr;
+ *port = s->in2out.port;
+ *fib_index = s->in2out.fib_index;
+ }
if (d)
*(snat_session_t **) d = s;
return next;
old_addr = ip->dst_address.as_u32;
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol, rx_fib_index,
- 0, 0, ~0, ~0, &s_kv);
+ init_ed_k (&s_kv, ip->dst_address, 0, ip->src_address, 0, rx_fib_index,
+ ip->protocol);
if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
{
return 0;
}
- make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
+ init_nat_k (&kv, ip->dst_address, 0, 0, 0);
if (clib_bihash_search_8_8
(&sm->static_mapping_by_external, &kv, &value))
{
if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
nat_elog_notice ("out2in key add failed");
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
- m->fib_index, 0, 0, thread_index, s - tsm->sessions, &s_kv);
+ init_ed_kv (&s_kv, ip->dst_address, 0, ip->src_address, 0, m->fib_index,
+ ip->protocol, thread_index, s - tsm->sessions);
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
nat_elog_notice ("in2out key add failed");
+
+ per_vrf_sessions_register_session (s, thread_index);
}
/* Update IP checksum */
vlib_frame_t * frame,
int is_multi_worker)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, fragments = 0;
-
- stats_node_index = sm->ed_out2in_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
+
+ b0 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
+ {
+ vlib_buffer_t *p2;
+
+ p2 = *b;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ vlib_prefetch_buffer_header (p2, LOAD);
- while (n_left_from > 0 && n_left_to_next > 0)
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ 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 (ip0->ttl == 1))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
- new_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- 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 = vnet_buffer2 (b0)->nat.arc_next;
-
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- 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 (ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- make_ed_kv (&ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- vnet_buffer (b0)->ip.reass.l4_src_port, ~0, ~0, &kv0);
-
- /* there is a stashed index in vnet_buffer2 from handoff node,
- * see if we can use it */
- if (is_multi_worker && PREDICT_TRUE
- (!pool_is_free_index
- (tsm->sessions,
- vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index)))
+ init_ed_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
+ ip0->protocol);
+
+ /* there is a stashed index in vnet_buffer2 from handoff node,
+ * see if we can use it */
+ if (is_multi_worker
+ &&
+ PREDICT_TRUE (!pool_is_free_index
+ (tsm->sessions,
+ vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index)))
+ {
+ s0 = pool_elt_at_index (tsm->sessions,
+ vnet_buffer2 (b0)->
+ nat.ed_out2in_nat_session_index);
+ if (PREDICT_TRUE
+ (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32
+ && s0->out2in.port == vnet_buffer (b0)->ip.reass.l4_dst_port
+ && s0->nat_proto == ip_proto_to_nat_proto (ip0->protocol)
+ && s0->out2in.fib_index == rx_fib_index0
+ && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32
+ && s0->ext_host_port ==
+ vnet_buffer (b0)->ip.reass.l4_src_port))
{
- s0 = pool_elt_at_index (tsm->sessions,
- vnet_buffer2 (b0)->
- nat.ed_out2in_nat_session_index);
- if (PREDICT_TRUE
- (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32
- && s0->out2in.port ==
- vnet_buffer (b0)->ip.reass.l4_dst_port
- && s0->out2in.protocol ==
- ip_proto_to_nat_proto (ip0->protocol)
- && s0->out2in.fib_index == rx_fib_index0
- && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32
- && s0->ext_host_port ==
- vnet_buffer (b0)->ip.reass.l4_src_port))
- {
- /* yes, this is the droid we're looking for */
- goto skip_lookup;
- }
+ /* yes, this is the droid we're looking for */
+ goto skip_lookup;
}
+ }
- if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
- }
- ASSERT (thread_index == ed_value_get_thread_index (&value0));
- s0 =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value0));
+ // lookup for session
+ if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
+ {
+ // session does not exist go slow path
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
+
+ skip_lookup:
+
+ if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- skip_lookup:
- if (s0->tcp_closed_timestamp)
+ if (s0->tcp_closed_timestamp)
+ {
+ if (now >= s0->tcp_closed_timestamp)
{
- if (now >= s0->tcp_closed_timestamp)
- {
- // session is closed, go slow path
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- }
- else
- {
- // session in transitory timeout, drop
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
- next0 = NAT_NEXT_DROP;
- }
- goto trace0;
+ // session is closed, go slow path, freed in slow path
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
-
- // drop if session expired
- u64 sess_timeout_time;
- sess_timeout_time = s0->last_heard +
- (f64) nat44_session_get_timeout (sm, s0);
- if (now >= sess_timeout_time)
+ else
{
- // session is closed, go slow path
- nat_free_session_data (sm, s0, thread_index, 0);
- nat_ed_session_delete (sm, s0, thread_index, 1);
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
+ next[0] = NAT_NEXT_DROP;
}
- //
+ goto trace0;
+ }
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ // drop if session expired
+ u64 sess_timeout_time;
+ sess_timeout_time =
+ s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
+ if (now >= sess_timeout_time)
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
+ old_addr0 = ip0->dst_address.as_u32;
+ new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, now, s0,
- vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
- vnet_buffer (b0)->ip.reass.tcp_ack_number,
- vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
{
sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
s0->ext_host_nat_addr.as_u32,
vnet_buffer (b0)->ip.reass.l4_src_port,
s0->ext_host_nat_port, ip4_header_t,
length);
- udp0->src_port = s0->ext_host_nat_port;
+ tcp0->src_port = s0->ext_host_nat_port;
ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ if (nat44_set_tcp_session_state_o2i
+ (sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
+ goto trace0;
+ }
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
+ {
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ sum0 = udp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 =
+ ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t, length);
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = ip_csum_fold (sum0);
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
- udp_packets++;
}
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* 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_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 0;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
- }
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 0;
+
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
+ }
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
- /* 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 (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ out2in_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OTHER_PACKETS,
- other_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
return frame->n_vectors;
}
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, fragments = 0;
-
- stats_node_index = sm->ed_out2in_slowpath_node_index;
+ snat_static_mapping_t *m;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
+ lb_nat_type_t lb_nat0;
+ twice_nat_type_t twice_nat0;
+ u8 identity_nat0;
+ ip4_address_t sm_addr;
+ u16 sm_port;
+ u32 sm_fib_index;
+
+ b0 = *b;
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ 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 (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- while (n_left_from > 0 && n_left_to_next > 0)
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
- new_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb_nat0;
- twice_nat_type_t twice_nat0;
- u8 identity_nat0;
-
- /* 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 = vnet_buffer2 (b0)->nat.arc_next;
-
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- 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 (ip0->ttl == 1))
+ s0 =
+ nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm, node);
+ if (!sm->forwarding_enabled)
{
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
+ if (!s0)
+ next[0] = NAT_NEXT_DROP;
}
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.other, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] = icmp_out2in_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next[0], now, thread_index, &s0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.icmp, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ init_ed_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
+ ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT_NEXT_DROP;
- }
- other_packets++;
- goto trace0;
- }
+ s0 = NULL;
+ if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
+ {
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
{
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace0;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
}
+ }
- make_ed_kv (&ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- vnet_buffer (b0)->ip.reass.l4_src_port, ~0, ~0, &kv0);
-
- s0 = NULL;
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
+ if (!s0)
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+
+ if (snat_static_mapping_match
+ (sm, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0,
+ &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m))
{
- ASSERT (thread_index == ed_value_get_thread_index (&value0));
- s0 =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value0));
-
- if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
- nat_free_session_data (sm, s0, thread_index, 0);
- nat_ed_session_delete (sm, s0, thread_index, 1);
- s0 = NULL;
+ goto trace0;
}
- }
- if (!s0)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb_nat0,
- &ip0->src_address,
- &identity_nat0))
+ if (!sm->forwarding_enabled)
{
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b0)->ip.
- reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat
+ (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, rx_fib_index0))
{
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT_NEXT_DROP;
+ next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH;
}
else
{
- if (next_src_nat
- (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto trace0;
- }
if (sm->num_workers > 1)
create_bypass_for_fwd_worker (sm, b0, ip0,
rx_fib_index0);
create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0,
thread_index);
}
- goto trace0;
}
+ goto trace0;
+ }
- if (PREDICT_FALSE (identity_nat0))
- goto trace0;
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
- if ((proto0 == NAT_PROTOCOL_TCP)
- && !tcp_flags_is_init (vnet_buffer (b0)->ip.
- reass.icmp_type_or_tcp_flags))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
+ if ((proto0 == NAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- rx_fib_index0,
- thread_index,
- twice_nat0,
- lb_nat0, now);
- if (!s0)
- {
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping_ed (sm, b0,
+ sm_addr, sm_port,
+ sm_fib_index,
+ ip0->dst_address,
+ vnet_buffer (b0)->
+ ip.reass.l4_dst_port,
+ rx_fib_index0, proto0,
+ node, rx_fib_index0,
+ thread_index, twice_nat0,
+ lb_nat0, now, m);
+ if (!s0)
+ {
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
+ }
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ old_addr0 = ip0->dst_address.as_u32;
+ new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip0->checksum = ip_csum_fold (sum0);
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, now, s0,
- vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
- vnet_buffer (b0)->ip.reass.tcp_ack_number,
- vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
{
sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
s0->ext_host_nat_addr.as_u32,
vnet_buffer (b0)->ip.reass.l4_src_port,
s0->ext_host_nat_port, ip4_header_t,
length);
- udp0->src_port = s0->ext_host_nat_port;
+ tcp0->src_port = s0->ext_host_nat_port;
ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ if (nat44_set_tcp_session_state_o2i
+ (sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
+ goto trace0;
+ }
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
+ {
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ sum0 = udp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t, length);
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = ip_csum_fold (sum0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
- udp_packets++;
}
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* 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_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 1;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
- }
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 1;
+
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
+ }
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
- /* 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 (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
+ b++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OTHER_PACKETS,
- other_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
Code Review / vpp.git / blobdiff