}
static inline uword
-nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- int is_output_feature)
+nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
{
u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
nat_next_t next_index;
def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
NAT_NEXT_IN2OUT_ED_SLOW_PATH;
- stats_node_index = is_slow_path ? sm->ed_in2out_slowpath_node_index :
- sm->ed_in2out_node_index;
+ stats_node_index = sm->ed_in2out_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, iph_offset0 = 0, proto0,
new_addr0, old_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1,
- new_addr1, old_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;
-
- /* 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);
if (is_output_feature)
{
- // output feature fast path is enabled on the arc
- // we need new arc_next feature
- if (PREDICT_TRUE (!is_slow_path))
- {
- vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0);
- vnet_feature_next (&nat_buffer_opaque (b1)->arc_next, b1);
- }
-
+ vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0);
iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- iph_offset1 = vnet_buffer (b1)->ip.reass.save_rewrite_length;
}
next0 = nat_buffer_opaque (b0)->arc_next;
- next1 = nat_buffer_opaque (b1)->arc_next;
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
iph_offset0);
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
next0 = NAT_NEXT_ICMP_ERROR;
- goto trace00;
+ 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_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm,
- node);
- if (!s0)
- next0 = NAT_NEXT_DROP;
- other_packets++;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace00;
- }
+ next0 = def_slow;
+ goto trace0;
}
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = def_slow;
- goto trace00;
- }
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace00;
- }
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = def_slow;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = def_slow;
+ goto trace0;
}
make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
vnet_buffer (b0)->ip.reass.l4_src_port,
vnet_buffer (b0)->ip.reass.l4_dst_port);
+ // lookup for session
if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
{
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, ip0->protocol,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- goto trace00;
-
- /*
- * 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_server))
- && ip0->dst_address.as_u32 == 0xffffffff))
- goto trace00;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index0,
- ip0, proto0,
- rx_fib_index0,
- thread_index)))
- goto trace00;
- }
-
- next0 =
- slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
- goto trace00;
-
- if (PREDICT_FALSE (!s0))
- goto trace00;
- }
- else
- {
- next0 = def_slow;
- goto trace00;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ // session does not exist go slow path
+ next0 = def_slow;
+ goto trace0;
}
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+
b0->flags |= VNET_BUFFER_F_IS_NATED;
if (!is_output_feature)
new_port0 = udp0->src_port = s0->out2in.port;
sum0 = tcp0->checksum;
sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
+ 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);
+ 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->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
sum0 =
ip_csum_update (sum0,
vnet_buffer (b0)->ip.
}
tcp_packets++;
if (nat44_set_tcp_session_state_i2o (sm, s0, b0, thread_index))
- goto trace00;
+ goto trace0;
}
else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
&& udp0->checksum)
{
new_port0 = udp0->src_port = s0->out2in.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);
+ 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->dst_address.as_u32,
/* Accounting */
nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm,
- b0),
- thread_index);
+ vlib_buffer_length_in_chain
+ (vm, b0), thread_index);
/* 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)))
{
nat_in2out_ed_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 == nat_buffer_opaque (b0)->arc_next;
-
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
-
- 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 = NAT_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_in2out_unknown_proto (sm, b1, ip1,
- rx_fib_index1,
- thread_index, now,
- vm, node);
- if (!s1)
- next1 = NAT_NEXT_DROP;
- other_packets++;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_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 = def_slow;
- goto trace01;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip1, thread_index, now, vm, b1)))
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = def_slow;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address,
- ip1->protocol, rx_fib_index1,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- vnet_buffer (b1)->ip.reass.l4_dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip1, ip1->protocol,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- vnet_buffer (b1)->ip.reass.l4_dst_port,
- thread_index, sw_if_index1,
- vnet_buffer (b1)->sw_if_index[VLIB_TX])))
- goto trace01;
-
- /*
- * 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
- && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_server))
- && ip1->dst_address.as_u32 == 0xffffffff))
- goto trace01;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index1,
- ip1,
- proto1,
- rx_fib_index1,
- thread_index)))
- goto trace01;
- }
-
- next1 =
- slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
- next1, thread_index, now);
-
- if (PREDICT_FALSE (next1 == NAT_NEXT_DROP))
- goto trace01;
-
- if (PREDICT_FALSE (!s1))
- goto trace01;
- }
else
- {
- next1 = def_slow;
- goto trace01;
- }
+ t->session_index = ~0;
}
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
- }
-
- b1->flags |= VNET_BUFFER_F_IS_NATED;
-
- if (!is_output_feature)
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
-
- old_addr1 = ip1->src_address.as_u32;
- new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32;
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip1->checksum = ip_csum_fold (sum1);
- old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port;
+ 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);
+ }
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port1 = udp1->src_port = s1->out2in.port;
- 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 (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- sum1 =
- ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 =
- ip_csum_update (sum1,
- vnet_buffer (b1)->ip.
- reass.l4_dst_port, s1->ext_host_port,
- ip4_header_t, length);
- tcp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold (sum1);
- mss_clamping (sm, tcp1, &sum1);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o (sm, s1, b1, thread_index))
- goto trace01;
- }
- else if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment
- && udp1->checksum)
- {
- new_port1 = udp1->src_port = s1->out2in.port;
- sum1 = udp1->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);
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 =
- ip_csum_update (sum1,
- vnet_buffer (b1)->ip.reass.l4_dst_port,
- s1->ext_host_port, ip4_header_t, length);
- udp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- udp1->checksum = ip_csum_fold (sum1);
- udp_packets++;
- }
- else
- {
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- new_port1 = udp1->src_port = s1->out2in.port;
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- udp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- }
- udp_packets++;
- }
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
+ icmp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
+ other_packets);
+ return frame->n_vectors;
+}
- /* 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);
+static inline uword
+nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next, 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;
- trace01:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat_in2out_ed_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;
- }
+ stats_node_index = sm->ed_in2out_slowpath_node_index;
- pkts_processed += next1 == nat_buffer_opaque (b1)->arc_next;
+ 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;
- /* 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)
{
b0 = vlib_get_buffer (vm, bi0);
if (is_output_feature)
- {
- // output feature fast path is enabled on the arc
- // we need new arc_next feature
- if (PREDICT_TRUE (!is_slow_path))
- vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0);
-
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- }
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
next0 = nat_buffer_opaque (b0)->arc_next;
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_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now,
- vm, node);
- if (!s0)
- next0 = NAT_NEXT_DROP;
- other_packets++;
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace0;
- }
+ s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
+ rx_fib_index0,
+ thread_index, now,
+ vm, node);
+ if (!s0)
+ next0 = NAT_NEXT_DROP;
+
+ other_packets++;
+ goto trace0;
}
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = def_slow;
- goto trace0;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
- }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = def_slow;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
+ node, next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace0;
}
+ // move down
make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
ip0->protocol, rx_fib_index0,
vnet_buffer (b0)->ip.reass.l4_src_port,
if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
{
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, ip0->protocol,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- goto trace0;
-
- /*
- * 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_server))
- && ip0->dst_address.as_u32 == 0xffffffff))
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index0,
- ip0,
- proto0,
- rx_fib_index0,
- thread_index)))
- goto trace0;
- }
- next0 =
- slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, ip0->protocol,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, sw_if_index0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX])))
goto trace0;
- if (PREDICT_FALSE (!s0))
+ /*
+ * 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_server))
+ && ip0->dst_address.as_u32 == 0xffffffff))
goto trace0;
}
else
{
- next0 = def_slow;
- goto trace0;
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate
+ (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ goto trace0;
}
+
+ next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
+ next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
+ goto trace0;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
+
}
else
{
s0 = pool_elt_at_index (tsm->sessions, value0.value);
}
+
b0->flags |= VNET_BUFFER_F_IS_NATED;
if (!is_output_feature)
{
nat_in2out_ed_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 == nat_buffer_opaque (b0)->arc_next;
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0);
+ return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
}
/* *INDENT-OFF* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1);
+ return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
}
/* *INDENT-OFF* */
vlib_node_runtime_t *
node, vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0);
+ return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
}
/* *INDENT-OFF* */
* node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1);
+ return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
}
/* *INDENT-OFF* */
}
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;
nat_next_t next_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;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
+ /* 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 = nat_buffer_opaque (b0)->arc_next;
- next1 = nat_buffer_opaque (b1)->arc_next;
vnet_buffer (b0)->snat.flags = 0;
ip0 = vlib_buffer_get_current (b0);
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
next0 = NAT_NEXT_ICMP_ERROR;
- goto trace00;
+ 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 = NAT_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 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace00;
- }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT_NEXT_OUT2IN_ED_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,
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 = 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))
- {
- /*
- * 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))))
- {
- goto trace00;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT_NEXT_DROP;
- }
- else
- {
- 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 trace00;
- }
- 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 trace00;
- }
-
- if (PREDICT_FALSE (identity_nat0))
- goto trace00;
-
- if ((proto0 == SNAT_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 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);
-
- if (!s0)
- {
- next0 = NAT_NEXT_DROP;
- goto trace00;
- }
- }
- else
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace00;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
}
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
old_addr0 = ip0->dst_address.as_u32;
new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
(sm, 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 trace00;
+ goto trace0;
}
else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
&& udp0->checksum)
new_port0 = udp0->dst_port = s0->in2out.port;
if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- 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;
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
}
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 == nat_buffer_opaque (b0)->arc_next;
-
- 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 = NAT_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 = NAT_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 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address,
- ip1->protocol, rx_fib_index1,
- vnet_buffer (b1)->ip.reass.l4_dst_port,
- vnet_buffer (b1)->ip.reass.l4_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 = vnet_buffer (b1)->ip.reass.l4_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
- && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- goto trace01;
- }
-
- if (!sm->forwarding_enabled)
- {
- b1->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next1 = NAT_NEXT_DROP;
- }
- else
- {
- if (next_src_nat
- (sm, ip1, ip1->protocol,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- vnet_buffer (b1)->ip.reass.l4_dst_port,
- thread_index, rx_fib_index1))
- {
- next1 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto trace01;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, b1, ip1,
- rx_fib_index1);
- else
- create_bypass_for_fwd (sm, b1, ip1, rx_fib_index1,
- thread_index);
- }
- goto trace01;
- }
-
- if (PREDICT_FALSE (identity_nat1))
- goto trace01;
-
- if ((proto1 == SNAT_PROTOCOL_TCP)
- && !tcp_flags_is_init (vnet_buffer (b1)->ip.
- reass.icmp_type_or_tcp_flags))
- {
- b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next1 = NAT_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 = NAT_NEXT_DROP;
- goto trace01;
- }
- }
else
- {
- next1 = NAT_NEXT_OUT2IN_ED_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;
-
- 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);
+ 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);
+ }
- old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- new_port1 = udp1->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,
- vnet_buffer (b1)->ip.
- reass.l4_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, vnet_buffer (b1)->ip.reass.icmp_type_or_tcp_flags,
- vnet_buffer (b1)->ip.reass.tcp_ack_number,
- vnet_buffer (b1)->ip.reass.tcp_seq_number, thread_index))
- goto trace01;
- }
- else if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment
- && udp1->checksum)
- {
- new_port1 = udp1->dst_port = s1->in2out.port;
- sum1 = udp1->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 (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, dst_address);
- sum1 =
- ip_csum_update (sum1,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- s1->ext_host_nat_port, ip4_header_t,
- length);
- udp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- udp1->checksum = ip_csum_fold (sum1);
- udp_packets++;
- }
- else
- {
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- 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 == nat_buffer_opaque (b1)->arc_next;
+ 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)
{
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 = NAT_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);
+ other_packets++;
+ 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++;
+ if (!s0)
+ next0 = NAT_NEXT_DROP;
goto trace0;
}
}
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
- }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
- }
+ 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 trace0;
}
make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
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 = 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 = 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))
+ /*
+ * 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
- && (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];
- next0 = NAT_NEXT_DROP;
- }
- else
- {
- 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;
}
- 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))
+ if (!sm->forwarding_enabled)
{
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
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)
+ else
{
- next0 = NAT_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))
+ {
+ 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_OUT2IN_ED_SLOW_PATH;
+ next0 = NAT_NEXT_DROP;
goto trace0;
}
}
{
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 == nat_buffer_opaque (b0)->arc_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_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* */
Code Review / vpp.git / commitdiff