diff options
Diffstat (limited to 'src/plugins/nat/out2in_ed.c')
| -rw-r--r-- | src/plugins/nat/out2in_ed.c | 915 |
1 files changed, 439 insertions, 476 deletions
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c index 3d081e15313..8286e66ffda 100644 --- a/src/plugins/nat/out2in_ed.c +++ b/src/plugins/nat/out2in_ed.c @@ -675,8 +675,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, vlib_frame_t * frame, int is_multi_worker) { - u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; - nat_next_t next_index; + u32 n_left_from, *from, pkts_processed = 0, stats_node_index; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; @@ -688,205 +687,158 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { - u32 n_left_to_next; + vlib_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + + b0 = *b; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); + + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - next0 = vnet_buffer2 (b0)->nat.arc_next; - - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT_NEXT_ICMP_ERROR; - goto trace0; - } + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + init_ed_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, + ip0->protocol); + + /* there is a stashed index in vnet_buffer2 from handoff node, + * see if we can use it */ + if (is_multi_worker + && + PREDICT_TRUE (!pool_is_free_index + (tsm->sessions, + vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index))) + { + s0 = pool_elt_at_index (tsm->sessions, + vnet_buffer2 (b0)-> + nat.ed_out2in_nat_session_index); + if (PREDICT_TRUE + (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32 + && s0->out2in.port == vnet_buffer (b0)->ip.reass.l4_dst_port + && s0->nat_proto == ip_proto_to_nat_proto (ip0->protocol) + && s0->out2in.fib_index == rx_fib_index0 + && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32 + && s0->ext_host_port == + vnet_buffer (b0)->ip.reass.l4_src_port)) { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; + /* yes, this is the droid we're looking for */ + goto skip_lookup; } + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; - } + if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + { + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - init_ed_k (&kv0, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, - vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, - ip0->protocol); - - /* there is a stashed index in vnet_buffer2 from handoff node, - * see if we can use it */ - if (is_multi_worker && PREDICT_TRUE - (!pool_is_free_index - (tsm->sessions, - vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index))) + skip_lookup: + if (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) { - s0 = pool_elt_at_index (tsm->sessions, - vnet_buffer2 (b0)-> - nat.ed_out2in_nat_session_index); - if (PREDICT_TRUE - (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32 - && s0->out2in.port == - vnet_buffer (b0)->ip.reass.l4_dst_port - && s0->nat_proto == ip_proto_to_nat_proto (ip0->protocol) - && s0->out2in.fib_index == rx_fib_index0 - && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32 - && s0->ext_host_port == - vnet_buffer (b0)->ip.reass.l4_src_port)) - { - /* yes, this is the droid we're looking for */ - goto skip_lookup; - } + // session is closed, go slow path + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; } - - if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + else { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; + // session in transitory timeout, drop + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } - ASSERT (thread_index == ed_value_get_thread_index (&value0)); - s0 = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value0)); + goto trace0; + } - skip_lookup: - if (s0->tcp_closed_timestamp) - { - if (now >= s0->tcp_closed_timestamp) - { - // session is closed, go slow path - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - } - else - { - // session in transitory timeout, drop - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED]; - next0 = NAT_NEXT_DROP; - } - goto trace0; - } + // drop if session expired + u64 sess_timeout_time; + sess_timeout_time = + s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); + if (now >= sess_timeout_time) + { + // session is closed, go slow path + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } + // - // drop if session expired - u64 sess_timeout_time; - sess_timeout_time = s0->last_heard + - (f64) nat44_session_get_timeout (sm, s0); - if (now >= sess_timeout_time) - { - // session is closed, go slow path - nat_free_session_data (sm, s0, thread_index, 0); - nat_ed_session_delete (sm, s0, thread_index, 1); - 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; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + src_address); + ip0->checksum = ip_csum_fold (sum0); - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->dst_port = s0->in2out.port; - sum0 = tcp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_o2i - (sm, now, s0, - vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags, - vnet_buffer (b0)->ip.reass.tcp_ack_number, - vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->dst_port = s0->in2out.port; - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = tcp0->checksum; + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (is_twice_nat_session (s0)) { sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, s0->ext_host_nat_addr.as_u32, @@ -896,59 +848,91 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, vnet_buffer (b0)->ip.reass.l4_src_port, s0->ext_host_nat_port, ip4_header_t, length); - udp0->src_port = s0->ext_host_nat_port; + tcp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + tcp0->checksum = ip_csum_fold (sum0); } - else + 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 (PREDICT_FALSE (is_twice_nat_session (s0))) + { + sum0 = + ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, length); + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + udp_packets++; + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp_packets++; } + 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: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 0; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + /* 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); - pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next; - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 0; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + pkts_processed += next[0] == vnet_buffer2 (b0)->nat.arc_next; + + n_left_from--; + next++; + b++; } + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + vlib_node_increment_counter (vm, stats_node_index, NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS, pkts_processed); @@ -972,8 +956,7 @@ 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; + u32 n_left_from, *from, pkts_processed = 0, stats_node_index; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; @@ -985,256 +968,205 @@ nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { - u32 n_left_to_next; + vlib_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + lb_nat_type_t lb_nat0; + twice_nat_type_t twice_nat0; + u8 identity_nat0; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + + b0 = *b; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); + + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - lb_nat_type_t lb_nat0; - twice_nat_type_t twice_nat0; - u8 identity_nat0; - ip4_address_t sm_addr; - u16 sm_port; - u32 sm_fib_index; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - next0 = vnet_buffer2 (b0)->nat.arc_next; - - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); - - if (PREDICT_FALSE (ip0->ttl == 1)) + s0 = + nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, + thread_index, now, vm, node); + if (!sm->forwarding_enabled) { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT_NEXT_ICMP_ERROR; - goto trace0; + if (!s0) + next[0] = NAT_NEXT_DROP; } + other_packets++; + goto trace0; + } - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = icmp_out2in_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next[0], now, thread_index, &s0); + icmp_packets++; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) - { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT_NEXT_DROP; - } - other_packets++; - goto trace0; - } + init_ed_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, + ip0->protocol); - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + s0 = NULL; + if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + { + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); + + if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace0; + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; } + } - init_ed_k (&kv0, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, - vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, - ip0->protocol); - - s0 = NULL; - if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + if (!s0) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, + &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0)) { - ASSERT (thread_index == ed_value_get_thread_index (&value0)); - s0 = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value0)); - - if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { - nat_free_session_data (sm, s0, thread_index, 0); - nat_ed_session_delete (sm, s0, thread_index, 1); - s0 = NULL; + goto trace0; } - } - if (!s0) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - - if (snat_static_mapping_match - (sm, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, - proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, - &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0)) + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; + } + else { - /* - * 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)))) + if (next_src_nat + (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + thread_index, rx_fib_index0)) { + next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH; goto trace0; } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT_NEXT_DROP; - } + if (sm->num_workers > 1) + create_bypass_for_fwd_worker (sm, b0, ip0, rx_fib_index0); else - { - if (next_src_nat - (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto trace0; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b0, ip0, - rx_fib_index0); - else - create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, - thread_index); - } - goto trace0; + create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, + thread_index); } + goto trace0; + } - if (PREDICT_FALSE (identity_nat0)) - goto trace0; + if (PREDICT_FALSE (identity_nat0)) + goto trace0; - if ((proto0 == NAT_PROTOCOL_TCP) - && !tcp_flags_is_init (vnet_buffer (b0)->ip. - reass.icmp_type_or_tcp_flags)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT_NEXT_DROP; - goto trace0; - } + if ((proto0 == NAT_PROTOCOL_TCP) + && !tcp_flags_is_init (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags)) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + next[0] = NAT_NEXT_DROP; + goto trace0; + } - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed (sm, b0, - sm_addr, sm_port, - sm_fib_index, - ip0->dst_address, - vnet_buffer (b0)-> - ip.reass.l4_dst_port, - rx_fib_index0, - proto0, node, - rx_fib_index0, - thread_index, - twice_nat0, lb_nat0, - now); - if (!s0) - { - next0 = NAT_NEXT_DROP; - goto trace0; - } + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping_ed (sm, b0, + sm_addr, sm_port, + sm_fib_index, + ip0->dst_address, + vnet_buffer (b0)-> + ip.reass.l4_dst_port, + rx_fib_index0, proto0, + node, rx_fib_index0, + thread_index, twice_nat0, + lb_nat0, now); + if (!s0) + { + next[0] = NAT_NEXT_DROP; + goto trace0; } + } - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + old_addr0 = ip0->dst_address.as_u32; + new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + src_address); + ip0->checksum = ip_csum_fold (sum0); - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->dst_port = s0->in2out.port; - sum0 = tcp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_o2i - (sm, now, s0, - vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags, - vnet_buffer (b0)->ip.reass.tcp_ack_number, - vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->dst_port = s0->in2out.port; - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = tcp0->checksum; + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (is_twice_nat_session (s0)) { sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, s0->ext_host_nat_addr.as_u32, @@ -1244,59 +1176,90 @@ nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm, vnet_buffer (b0)->ip.reass.l4_src_port, s0->ext_host_nat_port, ip4_header_t, length); - udp0->src_port = s0->ext_host_nat_port; + tcp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + tcp0->checksum = ip_csum_fold (sum0); } - else + 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 (PREDICT_FALSE (is_twice_nat_session (s0))) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, + ip4_header_t, dst_address); + sum0 = + ip_csum_update (sum0, + vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, length); + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + udp_packets++; + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp_packets++; } + 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: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 1; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + /* 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); - pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next; - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 1; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + pkts_processed += next[0] == vnet_buffer2 (b0)->nat.arc_next; + + n_left_from--; + next++; + b++; } + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + vlib_node_increment_counter (vm, stats_node_index, NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS, pkts_processed); |