#include <vppinfra/error.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
+#include <nat/nat44/inlines.h>
#include <nat/nat_syslog.h>
#include <nat/nat_ha.h>
#undef _
};
-typedef enum
-{
- NAT44_ED_OUT2IN_NEXT_DROP,
- NAT44_ED_OUT2IN_NEXT_LOOKUP,
- NAT44_ED_OUT2IN_NEXT_ICMP_ERROR,
- NAT44_ED_OUT2IN_NEXT_IN2OUT,
- NAT44_ED_OUT2IN_NEXT_SLOW_PATH,
- NAT44_ED_OUT2IN_NEXT_REASS,
- NAT44_ED_OUT2IN_N_NEXT,
-} nat44_ed_out2in_next_t;
-
typedef struct
{
u32 sw_if_index;
next0 = icmp_out2in (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 != NAT44_ED_OUT2IN_NEXT_DROP && s0))
+ if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
{
/* Accounting */
nat44_session_update_counters (s0, now,
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
nat_elog_warn ("in2out_ed key del failed");
+ ed_bihash_kv_t bihash_key;
+ clib_memset (&bihash_key, 0, sizeof (bihash_key));
+ bihash_key.k.dst_address = s->ext_host_addr.as_u32;
+ bihash_key.k.dst_port = s->ext_host_port;
+ bihash_key.k.src_address = s->out2in.addr.as_u32;
+ bihash_key.k.src_port = s->out2in.port;
+ bihash_key.k.protocol = s->out2in.protocol;
+ clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv,
+ 0 /* is_add */ );
+
if (snat_is_unk_proto_session (s))
goto delete;
snat_session_key_t eh_key;
nat44_is_idle_session_ctx_t ctx;
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
nat_elog_notice ("maximum sessions exceeded");
u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index);
if (!u)
{
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
nat_elog_warn ("create NAT user failed");
return 0;
}
s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
nat44_delete_user_with_no_session (sm, u, thread_index);
nat_elog_warn ("create NAT session failed");
return 0;
}
static void
-create_bypass_for_fwd (snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index,
- u32 thread_index)
+create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip,
+ u32 rx_fib_index, u32 thread_index)
{
nat_ed_ses_key_t key;
clib_bihash_kv_16_8_t kv, value;
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- if (get_icmp_o2i_ed_key (ip, &key))
+ if (get_icmp_o2i_ed_key (b, ip, &key))
return;
}
else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
{
u32 proto;
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
return;
u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index,
if (ip->protocol == IP_PROTOCOL_TCP)
{
tcp_header_t *tcp = ip4_next_header (ip);
- if (nat44_set_tcp_session_state_o2i (sm, s, tcp, thread_index))
+ if (nat44_set_tcp_session_state_o2i
+ (sm, now, s, tcp->flags, tcp->ack_number, tcp->seq_number,
+ thread_index))
return;
}
}
static inline void
-create_bypass_for_fwd_worker (snat_main_t * sm, ip4_header_t * ip,
- u32 rx_fib_index)
+create_bypass_for_fwd_worker (snat_main_t * sm, vlib_buffer_t * b,
+ ip4_header_t * ip, u32 rx_fib_index)
{
ip4_header_t ip_wkr = {
.src_address = ip->dst_address,
};
u32 thread_index = sm->worker_in2out_cb (&ip_wkr, rx_fib_index, 0);
- create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
+ create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
}
#ifndef CLIB_MARCH_VARIANT
u8 * p_dont_translate, void *d, void *e)
{
u32 next = ~0, sw_if_index, rx_fib_index;
- icmp46_header_t *icmp;
nat_ed_ses_key_t key;
clib_bihash_kv_16_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u8 dont_translate = 0, is_addr_only, identity_nat;
snat_session_key_t e_key, l_key;
- icmp = (icmp46_header_t *) ip4_next_header (ip);
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 (ip, &key))
+ if (get_icmp_o2i_ed_key (b, ip, &key))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
key.fib_index = rx_fib_index;
goto out;
}
b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
else
if (next_src_nat (sm, ip, key.proto, key.l_port, key.r_port,
thread_index, rx_fib_index))
{
- next = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ next = NAT_NEXT_IN2OUT_ED_FAST_PATH;
goto out;
}
if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip, rx_fib_index);
+ create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index);
else
- create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
+ create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
goto out;
}
}
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- (icmp->type != ICMP4_echo_request || !is_addr_only)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request || !is_addr_only)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
if (!s)
{
- next = NAT44_ED_OUT2IN_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
}
else
{
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- icmp->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request
+ && !icmp_type_is_error_message (vnet_buffer (b)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
}
else
{
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
nat_elog_notice ("maximum sessions exceeded");
thread_index);
if (!u)
{
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_CANNOT_CREATE_USER];
nat_elog_warn ("create NAT user failed");
return 0;
}
s = nat_ed_session_alloc (sm, u, thread_index, now);
if (!s)
{
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
nat44_delete_user_with_no_session (sm, u, thread_index);
nat_elog_warn ("create NAT session failed");
return 0;
}
static inline uword
-nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path)
+nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat44_ed_out2in_next_t next_index;
+ nat_next_t next_index;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
0, fragments = 0;
- stats_node_index = is_slow_path ? sm->ed_out2in_slowpath_node_index :
- sm->ed_out2in_node_index;
+ stats_node_index = sm->ed_out2in_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (n_left_from >= 4 && n_left_to_next >= 2)
+ while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
+ u32 bi0;
+ vlib_buffer_t *b0;
u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
new_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1,
- new_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- ip4_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
- ip_csum_t sum0, sum1;
- snat_session_key_t e_key0, l_key0, e_key1, l_key1;
- lb_nat_type_t lb_nat0, lb_nat1;
- twice_nat_type_t twice_nat0, twice_nat1;
- u8 identity_nat0, identity_nat1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
+ 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);
- b1 = vlib_get_buffer (vm, bi1);
+ next0 = nat_buffer_opaque (b0)->arc_next;
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
vnet_buffer (b0)->snat.flags = 0;
ip0 = vlib_buffer_get_current (b0);
icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
- next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
+ next0 = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
}
udp0 = ip4_next_header (ip0);
tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (is_slow_path)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- 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 trace00;
- }
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
}
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
- goto trace00;
- }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
}
make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
+ ip0->protocol, rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ vnet_buffer (b0)->ip.reass.l4_src_port);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
{
- if (is_slow_path)
- {
- /* 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 = udp0->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))
- {
- /*
- * 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 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace00;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace00;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
- rx_fib_index0);
- else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- }
- goto trace00;
- }
-
- if (PREDICT_FALSE (identity_nat0))
- goto trace00;
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0, now);
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
- if (!s0)
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
+ if (s0->tcp_close_timestamp)
+ {
+ if (now >= s0->tcp_close_timestamp)
+ {
+ // session is closed, go slow path
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
else
{
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
+ next0 = NAT_NEXT_DROP;
}
+ goto trace0;
}
- else
+
+ // 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)
{
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat44_delete_session (sm, s0, thread_index);
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
}
+ //
old_addr0 = ip0->dst_address.as_u32;
new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
src_address);
ip0->checksum = ip_csum_fold (sum0);
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->dst_port = s0->in2out.port;
-
- sum0 = tcp0->checksum;
+ 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)
+ {
+ 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 (is_twice_nat_session (s0))
+ 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, tcp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
+ 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;
}
- tcp0->checksum = ip_csum_fold (sum0);
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, s0, tcp0, thread_index))
- goto trace00;
+ udp0->checksum = ip_csum_fold (sum0);
+ udp_packets++;
}
else
{
- udp0->dst_port = s0->in2out.port;
- if (is_twice_nat_session (s0))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ 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->checksum = 0;
udp_packets++;
}
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s0, thread_index);
- trace00:
+ 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->is_slow_path = is_slow_path;
t->sw_if_index = sw_if_index0;
t->next_index = next0;
- t->session_index = ~0;
+ t->is_slow_path = 0;
+
if (s0)
t->session_index = s0 - tsm->sessions;
- }
-
- pkts_processed += next0 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
-
- next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b1)->snat.flags = 0;
- ip1 = vlib_buffer_get_current (b1);
-
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index1);
-
- if (PREDICT_FALSE (ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace01;
- }
-
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- s1 =
- nat44_ed_out2in_unknown_proto (sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s1)
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_out2in_ed_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- icmp_packets++;
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address,
- ip1->protocol, rx_fib_index1, udp1->dst_port,
- udp1->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key1.addr = ip1->dst_address;
- e_key1.port = udp1->dst_port;
- e_key1.protocol = proto1;
- e_key1.fib_index = rx_fib_index1;
- if (snat_static_mapping_match (sm, e_key1, &l_key1, 1, 0,
- &twice_nat1, &lb_nat1,
- &ip1->src_address,
- &identity_nat1))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
- && (udp1->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next1, b1);
- goto trace01;
- }
-
- if (!sm->forwarding_enabled)
- {
- b1->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip1, ip1->protocol,
- udp1->src_port, udp1->dst_port,
- thread_index, rx_fib_index1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace01;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip1,
- rx_fib_index1);
- else
- create_bypass_for_fwd (sm, ip1, rx_fib_index1,
- thread_index);
- }
- goto trace01;
- }
-
- if (PREDICT_FALSE (identity_nat1))
- goto trace01;
-
- if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
- {
- b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
-
- /* Create session initiated by host from external network */
- s1 = create_session_for_static_mapping_ed (sm, b1, l_key1,
- e_key1, node,
- thread_index,
- twice_nat1,
- lb_nat1, now);
-
- if (!s1)
- {
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
else
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
+ t->session_index = ~0;
}
- old_addr1 = ip1->dst_address.as_u32;
- new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32;
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
+ pkts_processed += next0 == nat_buffer_opaque (b0)->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);
+ }
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip1->checksum = ip_csum_fold (sum1);
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->dst_port;
- new_port1 = tcp1->dst_port = s1->in2out.port;
+ 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);
+ return frame->n_vectors;
+}
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
- if (is_twice_nat_session (s1))
- {
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->src_port,
- s1->ext_host_nat_port, ip4_header_t,
- length);
- tcp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold (sum1);
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, s1, tcp1, thread_index))
- goto trace01;
- }
- else
- {
- udp1->dst_port = s1->in2out.port;
- if (is_twice_nat_session (s1))
- {
- udp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- udp1->checksum = 0;
- udp_packets++;
- }
+static inline uword
+nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm,
+ 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;
+ 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;
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
+ stats_node_index = sm->ed_out2in_slowpath_node_index;
- trace01:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - tsm->sessions;
- }
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
- pkts_processed += next1 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ next0 = nat_buffer_opaque (b0)->arc_next;
+
vnet_buffer (b0)->snat.flags = 0;
ip0 = vlib_buffer_get_current (b0);
icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
- next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
+ next0 = NAT_NEXT_ICMP_ERROR;
goto trace0;
}
icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (is_slow_path)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ s0 =
+ nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm, node);
+ if (!sm->forwarding_enabled)
{
- 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;
+ if (!s0)
+ next0 = NAT_NEXT_DROP;
}
+ other_packets++;
+ goto trace0;
}
- else
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
- }
+ 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;
+ }
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
- goto trace0;
- }
+ make_ed_kv (&kv0, &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);
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ s0 = NULL;
+ if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+
+ if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
{
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat44_delete_session (sm, s0, thread_index);
+ s0 = NULL;
}
}
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ if (!s0)
{
- if (is_slow_path)
+ /* 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))
{
- /* 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 = udp0->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))
+ /*
+ * 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 == SNAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.
+ reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
- /*
- * 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 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
- rx_fib_index0);
- else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- }
goto trace0;
}
- if (PREDICT_FALSE (identity_nat0))
- goto trace0;
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ if (!sm->forwarding_enabled)
{
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next0 = NAT_NEXT_DROP;
}
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0, now);
-
- if (!s0)
+ else
{
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
+ if (next_src_nat (sm, ip0, ip0->protocol,
+ 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);
+ else
+ create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0,
+ thread_index);
}
+ goto trace0;
}
- else
+
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
+
+ if ((proto0 == SNAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags))
{
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next0 = 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,
+ thread_index,
+ twice_nat0,
+ lb_nat0, now);
+ if (!s0)
+ {
+ next0 = NAT_NEXT_DROP;
goto trace0;
}
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
}
old_addr0 = ip0->dst_address.as_u32;
src_address);
ip0->checksum = ip_csum_fold (sum0);
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->dst_port = s0->in2out.port;
-
- sum0 = tcp0->checksum;
+ 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)
+ {
+ 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 (is_twice_nat_session (s0))
+ 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, tcp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
+ 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;
}
- tcp0->checksum = ip_csum_fold (sum0);
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, s0, tcp0, thread_index))
- goto trace0;
+ udp0->checksum = ip_csum_fold (sum0);
+ udp_packets++;
}
else
{
- udp0->dst_port = s0->in2out.port;
- if (is_twice_nat_session (s0))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ 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->checksum = 0;
udp_packets++;
}
{
nat44_ed_out2in_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
t->sw_if_index = sw_if_index0;
t->next_index = next0;
- t->session_index = ~0;
+ t->is_slow_path = 1;
+
if (s0)
t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
}
- pkts_processed += next0 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ pkts_processed += next0 == nat_buffer_opaque (b0)->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,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0);
+ return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_out2in_node) = {
.name = "nat44-ed-out2in",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat44_ed_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
.error_strings = nat_out2in_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
};
/* *INDENT-ON* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1);
+ return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = {
.name = "nat44-ed-out2in-slowpath",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat44_ed_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
.error_strings = nat_out2in_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
};
/* *INDENT-ON* */
-VLIB_NODE_FN (nat44_ed_out2in_reass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+static u8 *
+format_nat_pre_trace (u8 * s, va_list * args)
{
- u32 n_left_from, *from, *to_next;
- nat44_ed_out2in_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;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- 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;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb0;
- 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 = NAT44_ED_OUT2IN_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 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- 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 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_REASS];
- nat_elog_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- reass0->thread_index = thread_index;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8
- (&per_thread_data->out2in_ed, &kv0, &value0))
- {
- /* 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 = udp0->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, &lb0, 0,
- &identity_nat0))
- {
- /*
- * 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 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port
- ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
- rx_fib_index0);
- else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- goto trace0;
- }
-
- if (PREDICT_FALSE (identity_nat0))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_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,
- thread_index,
- twice_nat0, lb0,
- now);
- if (!s0)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- reass0->sess_index = s0 - per_thread_data->sessions;
- reass0->thread_index = thread_index;
- }
- 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
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_FRAG];
- nat_elog_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.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 /* changed member */ );
- 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_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_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 (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, tcp0->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);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- if (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->checksum = 0;
- }
- }
-
- /* 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_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 != NAT44_ED_OUT2IN_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_fast (from, fragments_to_loopback,
- sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy_fast (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, sm->ed_out2in_reass_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT],
- NAT44_ED_OUT2IN_NEXT_DROP);
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
+ return format (s, "out2in next_index %d", t->next_index);
+}
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
+VLIB_NODE_FN (nat_pre_out2in_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat_pre_node_fn_inline (vm, node, frame,
+ NAT_NEXT_OUT2IN_ED_FAST_PATH);
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = {
- .name = "nat44-ed-out2in-reass",
+VLIB_REGISTER_NODE (nat_pre_out2in_node) = {
+ .name = "nat-pre-out2in",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_reass_trace,
+ .sibling_of = "nat-default",
+ .format_trace = format_nat_pre_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
- .error_strings = nat_out2in_ed_error_strings,
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
-};
+ .n_errors = 0,
+ };
/* *INDENT-ON* */
/*
Code Review / vpp.git / blobdiff