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authorKlement Sekera <ksekera@cisco.com>2020-06-17 13:46:41 +0000
committerDamjan Marion <dmarion@me.com>2020-06-27 10:19:46 +0000
commit9466e4fed6faaf9c161767e2bc42c9cb0cf2c7ec (patch)
treeeea62e53387d82c0fdc683d0f16b5e7e9b009b49 /src/plugins/nat/out2in.c
parent78c61c33f323720f8225f53969bf196e6fc9e6dd (diff)
nat: replace speculative buffer enqueue model
Replace speculative buffer enqueue coding model with vlib_get_buffers(...)/vlib_buffer_enqueue_to_next(...). Type: improvement Change-Id: I7dbfac2234a7bd754c599857eb1d5b601da5bc7c Signed-off-by: Klement Sekera <ksekera@cisco.com>
Diffstat (limited to 'src/plugins/nat/out2in.c')
-rw-r--r--src/plugins/nat/out2in.c1334
1 files changed, 642 insertions, 692 deletions
diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c
index 071e16d4416..4e6ceb72f6a 100644
--- a/src/plugins/nat/out2in.c
+++ b/src/plugins/nat/out2in.c
@@ -724,8 +724,7 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- u32 n_left_from, *from, *to_next;
- snat_out2in_next_t next_index;
+ u32 n_left_from, *from;
u32 pkts_processed = 0;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
@@ -736,658 +735,626 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm,
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
- while (n_left_from > 0)
+ 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 >= 2)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0, *b1;
+ u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ u32 new_addr1, old_addr1;
+ u16 new_port1, old_port1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ u32 rx_fib_index0, rx_fib_index1;
+ u32 proto0, proto1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_8_8_t kv0, kv1, value0, value1;
+ u8 identity_nat0, identity_nat1;
+ ip4_address_t sm_addr0, sm_addr1;
+ u16 sm_port0, sm_port1;
+ u32 sm_fib_index0, sm_fib_index1;
+
+ b0 = *b;
+ b++;
+ b1 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 4))
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = *b;
+ p3 = *(b + 1);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ vnet_buffer (b0)->snat.flags = 0;
+ vnet_buffer (b1)->snat.flags = 0;
- while (n_left_from >= 4 && n_left_to_next >= 2)
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
{
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t *ip0, *ip1;
- ip_csum_t sum0, sum1;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- u32 new_addr1, old_addr1;
- u16 new_port1, old_port1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- u32 rx_fib_index0, rx_fib_index1;
- u32 proto0, proto1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_8_8_t kv0, kv1, value0, value1;
- u8 identity_nat0, identity_nat1;
- ip4_address_t sm_addr0, sm_addr1;
- u16 sm_port0, sm_port1;
- u32 sm_fib_index0, sm_fib_index1;
-
- /* 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, LOAD);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- /* 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;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- vnet_buffer (b0)->snat.flags = 0;
- vnet_buffer (b1)->snat.flags = 0;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- 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 = SNAT_OUT2IN_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);
+ next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
{
- if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
+ if (!sm->forwarding_enabled)
{
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
}
- other_packets++;
- goto trace0;
}
+ other_packets++;
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace0;
+ }
- init_nat_k (&kv0, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
- proto0);
- if (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ init_nat_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0);
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ {
+ /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
+ 0, &identity_nat0))
{
- /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
- 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 == NAT_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 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b0)->ip.reass.l4_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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
+ vnet_feature_next (&next0, b0);
goto trace0;
}
- if (PREDICT_FALSE (identity_nat0))
- goto trace0;
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping (sm, b0,
- sm_addr0, sm_port0,
- sm_fib_index0,
- ip0->dst_address,
- vnet_buffer (b0)->
- ip.reass.l4_dst_port,
- rx_fib_index0, proto0,
- node, thread_index,
- now);
- if (!s0)
+ if (!sm->forwarding_enabled)
{
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
}
+ goto trace0;
}
- else
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- 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;
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0,
+ sm_addr0, sm_port0,
+ sm_fib_index0,
+ ip0->dst_address,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port,
+ rx_fib_index0, proto0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ }
+ else
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+
+ 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 */ );
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t, dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- 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 /* changed member */ );
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ 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 /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (udp0->checksum))
{
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (udp0->checksum))
- {
- sum0 = udp0->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 */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
}
- udp_packets++;
}
+ udp_packets++;
+ }
- /* 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:
+ /* 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)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index =
- s0 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP;
+ pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP;
- ip1 = vlib_buffer_get_current (b1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index1);
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+ rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
+ 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace1;
- }
+ 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
- proto1 = ip_proto_to_nat_proto (ip1->protocol);
+ proto1 = ip_proto_to_nat_proto (ip1->protocol);
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER))
+ if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
{
- if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
+ if (!sm->forwarding_enabled)
{
- if (!sm->forwarding_enabled)
- {
- b1->error =
- node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next1 = SNAT_OUT2IN_NEXT_DROP;
- }
+ b1->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
}
- other_packets++;
- goto trace1;
}
+ other_packets++;
+ goto trace1;
+ }
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP))
- {
- next1 = icmp_out2in_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- icmp_packets++;
- goto trace1;
- }
+ if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_out2in_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ icmp_packets++;
+ goto trace1;
+ }
- init_nat_k (&kv1, ip1->dst_address,
- vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1,
- proto1);
+ init_nat_k (&kv1, ip1->dst_address,
+ vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1,
+ proto1);
- if (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].out2in, &kv1, &value1))
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv1, &value1))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match
+ (sm, ip1->dst_address,
+ vnet_buffer (b1)->ip.reass.l4_dst_port, proto1,
+ rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0,
+ 0, 0, 0, &identity_nat1))
{
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- if (snat_static_mapping_match
- (sm, ip1->dst_address,
- vnet_buffer (b1)->ip.reass.l4_dst_port, proto1,
- rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0,
- 0, 0, 0, &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 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b1)->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
- (proto1 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next1, b1);
- goto trace1;
- }
-
- if (!sm->forwarding_enabled)
- {
- b1->error =
- node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next1 = SNAT_OUT2IN_NEXT_DROP;
- }
+ vnet_feature_next (&next1, b1);
goto trace1;
}
- if (PREDICT_FALSE (identity_nat1))
- goto trace1;
-
- /* Create session initiated by host from external network */
- s1 =
- create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1,
- sm_fib_index1,
- ip1->dst_address,
- vnet_buffer (b1)->ip.
- reass.l4_dst_port,
- rx_fib_index1, proto1,
- node, thread_index, now);
- if (!s1)
+ if (!sm->forwarding_enabled)
{
+ b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next1 = SNAT_OUT2IN_NEXT_DROP;
- goto trace1;
}
+ goto trace1;
}
- else
- s1 =
- pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value1.value);
-
- old_addr1 = ip1->dst_address.as_u32;
- ip1->dst_address = s1->in2out.addr;
- new_addr1 = ip1->dst_address.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 /* changed member */ );
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP))
+
+ if (PREDICT_FALSE (identity_nat1))
+ goto trace1;
+
+ /* Create session initiated by host from external network */
+ s1 =
+ create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1,
+ sm_fib_index1,
+ ip1->dst_address,
+ vnet_buffer (b1)->ip.
+ reass.l4_dst_port,
+ rx_fib_index1, proto1, node,
+ thread_index, now);
+ if (!s1)
{
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
- new_port1 = udp1->dst_port = s1->in2out.port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */ );
-
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- tcp1->checksum = ip_csum_fold (sum1);
- }
- tcp_packets++;
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace1;
}
- else
+ }
+ else
+ s1 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value1.value);
+
+ old_addr1 = ip1->dst_address.as_u32;
+ ip1->dst_address = s1->in2out.addr;
+ new_addr1 = ip1->dst_address.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 /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
+ {
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
+ new_port1 = udp1->dst_port = s1->in2out.port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
+ new_port1 = udp1->dst_port = s1->in2out.port;
+ if (PREDICT_FALSE (udp1->checksum))
{
- old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
- new_port1 = udp1->dst_port = s1->in2out.port;
- if (PREDICT_FALSE (udp1->checksum))
- {
-
- sum1 = udp1->checksum;
- sum1 =
- ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */ );
- sum1 =
- ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- udp1->checksum = ip_csum_fold (sum1);
- }
+
+ sum1 = udp1->checksum;
+ sum1 =
+ ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum1 =
+ ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ udp1->checksum = ip_csum_fold (sum1);
}
- udp_packets++;
}
+ udp_packets++;
+ }
- /* 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);
- trace1:
+ /* 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);
+ trace1:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index =
- s1 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index =
+ s1 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next1 == SNAT_OUT2IN_NEXT_LOOKUP;
+ pkts_processed += next1 == SNAT_OUT2IN_NEXT_LOOKUP;
- /* 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);
- }
+ n_left_from -= 2;
+ next[0] = next0;
+ next[1] = next1;
+ next += 2;
+ }
- while (n_left_from > 0 && n_left_to_next > 0)
+ while (n_left_from > 0)
+ {
+ vlib_buffer_t *b0;
+ u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ u32 rx_fib_index0;
+ u32 proto0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u8 identity_nat0;
+ ip4_address_t sm_addr0;
+ u16 sm_port0;
+ u32 sm_fib_index0;
+
+ b0 = *b;
+ ++b;
+
+ vnet_buffer (b0)->snat.flags = 0;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
+ sw_if_index0);
+
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0;
- ip4_header_t *ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u32 rx_fib_index0;
- u32 proto0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
- u8 identity_nat0;
- ip4_address_t sm_addr0;
- u16 sm_port0;
- u32 sm_fib_index0;
-
- /* 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);
-
- vnet_buffer (b0)->snat.flags = 0;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
{
- if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
+ if (!sm->forwarding_enabled)
{
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
}
- other_packets++;
- goto trace00;
}
+ other_packets++;
+ goto trace00;
+ }
- 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
+ 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace00;
+ }
- init_nat_k (&kv0, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
- proto0);
+ init_nat_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0);
- if (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ {
+ /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
+ 0, &identity_nat0))
{
- /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
- 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 == NAT_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 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b0)->ip.reass.l4_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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
+ vnet_feature_next (&next0, b0);
goto trace00;
}
- if (PREDICT_FALSE (identity_nat0))
- goto trace00;
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping (sm, b0,
- sm_addr0, sm_port0,
- sm_fib_index0,
- ip0->dst_address,
- vnet_buffer (b0)->
- ip.reass.l4_dst_port,
- rx_fib_index0, proto0,
- node, thread_index,
- now);
- if (!s0)
+ if (!sm->forwarding_enabled)
{
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
}
+ goto trace00;
}
- else
- s0 =
- pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
- 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;
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace00;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0,
+ sm_addr0, sm_port0,
+ sm_fib_index0,
+ ip0->dst_address,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port,
+ rx_fib_index0, proto0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ 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 */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- 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 /* changed member */ );
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ 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 /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (udp0->checksum))
{
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (udp0->checksum))
- {
- sum0 = udp0->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 */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
}
- udp_packets++;
- }
-
- /* 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);
- trace00:
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index =
- s0 - sm->per_thread_data[thread_index].sessions;
}
+ udp_packets++;
+ }
- pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP;
+ /* 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);
+ trace00:
- /* 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_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP;
+
+ n_left_from--;
+ next[0] = next0;
+ next++;
}
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
vlib_node_increment_counter (vm, sm->out2in_node_index,
SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
pkts_processed);
@@ -1433,173 +1400,156 @@ VLIB_NODE_FN (snat_out2in_fast_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- u32 n_left_from, *from, *to_next;
- snat_out2in_next_t next_index;
+ u32 n_left_from, *from;
u32 pkts_processed = 0;
snat_main_t *sm = &snat_main;
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 next0 = SNAT_OUT2IN_NEXT_DROP;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ u32 proto0;
+ u32 rx_fib_index0;
+ ip4_address_t sm_addr0;
+ u16 sm_port0;
+ u32 sm_fib_index0;
+
+ b0 = *b;
+ b++;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ vnet_feature_next (&next0, b0);
+
+ 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ 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))
+ goto trace00;
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0 = SNAT_OUT2IN_NEXT_DROP;
- u32 sw_if_index0;
- ip4_header_t *ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u32 proto0;
- u32 rx_fib_index0;
- ip4_address_t sm_addr0;
- u16 sm_port0;
- u32 sm_fib_index0;
-
- /* 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);
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-
- vnet_feature_next (&next0, b0);
-
- 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 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0, 0);
+ goto trace00;
+ }
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ if (snat_static_mapping_match
+ (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0,
+ &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- goto trace00;
+ new_addr0 = sm_addr0.as_u32;
+ new_port0 = sm_port0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0;
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_addr0;
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0, 0);
- goto trace00;
- }
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t, dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (snat_static_mapping_match
- (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0,
- &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0))
+ if (PREDICT_FALSE (new_port0 != udp0->dst_port))
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = new_port0;
+
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
{
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace00;
+ 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 */ );
+ tcp0->checksum = ip_csum_fold (sum0);
}
-
- new_addr0 = sm_addr0.as_u32;
- new_port0 = sm_port0;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0;
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (new_port0 != udp0->dst_port))
+ else if (udp0->checksum)
{
- old_port0 = udp0->dst_port;
- udp0->dst_port = new_port0;
-
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- 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 */ );
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->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 */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
}
- else
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
{
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
}
-
- trace00:
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ else if (udp0->checksum)
{
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
+ sum0 = udp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ udp0->checksum = ip_csum_fold (sum0);
}
+ }
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
+ trace00:
- /* 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_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
+
+ n_left_from--;
+ next[0] = next0;
+ next++;
}
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
vlib_node_increment_counter (vm, sm->out2in_fast_node_index,
SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
pkts_processed);