From 2ba92e32e0197f676dd905e5edcb4ff3e1bec241 Mon Sep 17 00:00:00 2001 From: Matus Fabian Date: Mon, 21 Aug 2017 07:05:03 -0700 Subject: NAT: Rename snat plugin to nat (VPP-955) Change-Id: I30a7e3da7a4efc6038a91e27b48045d4b07e2764 Signed-off-by: Matus Fabian --- src/plugins/snat/nat64_out2in.c | 494 ---------------------------------------- 1 file changed, 494 deletions(-) delete mode 100644 src/plugins/snat/nat64_out2in.c (limited to 'src/plugins/snat/nat64_out2in.c') diff --git a/src/plugins/snat/nat64_out2in.c b/src/plugins/snat/nat64_out2in.c deleted file mode 100644 index cd5b253ab5c..00000000000 --- a/src/plugins/snat/nat64_out2in.c +++ /dev/null @@ -1,494 +0,0 @@ -/* - * Copyright (c) 2017 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/** - * @file - * @brief NAT64 IPv4 to IPv6 translation (otside to inside network) - */ - -#include -#include -#include - -typedef struct -{ - u32 sw_if_index; - u32 next_index; -} nat64_out2in_trace_t; - -static u8 * -format_nat64_out2in_trace (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - nat64_out2in_trace_t *t = va_arg (*args, nat64_out2in_trace_t *); - - s = - format (s, "NAT64-out2in: sw_if_index %d, next index %d", t->sw_if_index, - t->next_index); - - return s; -} - -vlib_node_registration_t nat64_out2in_node; - -#define foreach_nat64_out2in_error \ -_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ -_(OUT2IN_PACKETS, "Good out2in packets processed") \ -_(NO_TRANSLATION, "No translation") \ -_(UNKNOWN, "unknown") - -typedef enum -{ -#define _(sym,str) NAT64_OUT2IN_ERROR_##sym, - foreach_nat64_out2in_error -#undef _ - NAT64_OUT2IN_N_ERROR, -} nat64_out2in_error_t; - -static char *nat64_out2in_error_strings[] = { -#define _(sym,string) string, - foreach_nat64_out2in_error -#undef _ -}; - -typedef enum -{ - NAT64_OUT2IN_NEXT_LOOKUP, - NAT64_OUT2IN_NEXT_DROP, - NAT64_OUT2IN_N_NEXT, -} nat64_out2in_next_t; - -typedef struct nat64_out2in_set_ctx_t_ -{ - vlib_buffer_t *b; - vlib_main_t *vm; -} nat64_out2in_set_ctx_t; - -static int -nat64_out2in_tcp_udp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, - void *arg) -{ - nat64_main_t *nm = &nat64_main; - nat64_out2in_set_ctx_t *ctx = arg; - nat64_db_bib_entry_t *bibe; - nat64_db_st_entry_t *ste; - ip46_address_t saddr, daddr; - ip6_address_t ip6_saddr; - udp_header_t *udp = ip4_next_header (ip4); - tcp_header_t *tcp = ip4_next_header (ip4); - u8 proto = ip4->protocol; - u16 dport = udp->dst_port; - u16 sport = udp->src_port; - u32 sw_if_index, fib_index; - u16 *checksum; - ip_csum_t csum; - - sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; - fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - - memset (&saddr, 0, sizeof (saddr)); - saddr.ip4.as_u32 = ip4->src_address.as_u32; - memset (&daddr, 0, sizeof (daddr)); - daddr.ip4.as_u32 = ip4->dst_address.as_u32; - - ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, dport, sport, proto, - fib_index, 0); - if (ste) - { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - } - else - { - bibe = - nat64_db_bib_entry_find (&nm->db, &daddr, dport, proto, fib_index, 0); - - if (!bibe) - return -1; - - nat64_compose_ip6 (&ip6_saddr, &ip4->src_address, bibe->fib_index); - ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6_saddr, &saddr.ip4, - sport); - } - - nat64_session_reset_timeout (ste, ctx->vm); - - ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0]; - ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1]; - - ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; - ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; - udp->dst_port = bibe->in_port; - - if (proto == IP_PROTOCOL_UDP) - checksum = &udp->checksum; - else - checksum = &tcp->checksum; - csum = ip_csum_sub_even (*checksum, dport); - csum = ip_csum_add_even (csum, udp->dst_port); - *checksum = ip_csum_fold (csum); - - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index; - - return 0; -} - -static int -nat64_out2in_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg) -{ - nat64_main_t *nm = &nat64_main; - nat64_out2in_set_ctx_t *ctx = arg; - nat64_db_bib_entry_t *bibe; - nat64_db_st_entry_t *ste; - ip46_address_t saddr, daddr; - ip6_address_t ip6_saddr; - u32 sw_if_index, fib_index; - icmp46_header_t *icmp = ip4_next_header (ip4); - - sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; - fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - - memset (&saddr, 0, sizeof (saddr)); - saddr.ip4.as_u32 = ip4->src_address.as_u32; - memset (&daddr, 0, sizeof (daddr)); - daddr.ip4.as_u32 = ip4->dst_address.as_u32; - - if (icmp->type == ICMP6_echo_request || icmp->type == ICMP6_echo_reply) - { - u16 out_id = ((u16 *) (icmp))[2]; - ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, out_id, 0, - IP_PROTOCOL_ICMP, fib_index, 0); - - if (ste) - { - bibe = - nat64_db_bib_entry_by_index (&nm->db, IP_PROTOCOL_ICMP, - ste->bibe_index); - if (!bibe) - return -1; - } - else - { - bibe = - nat64_db_bib_entry_find (&nm->db, &daddr, out_id, - IP_PROTOCOL_ICMP, fib_index, 0); - if (!bibe) - return -1; - - nat64_compose_ip6 (&ip6_saddr, &ip4->src_address, bibe->fib_index); - ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6_saddr, &saddr.ip4, - 0); - } - - nat64_session_reset_timeout (ste, ctx->vm); - - ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0]; - ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1]; - - ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; - ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; - ((u16 *) (icmp))[2] = bibe->in_port; - - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index; - } - else - { - ip6_header_t *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8); - - nat64_compose_ip6 (&ip6->src_address, &ip4->src_address, - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX]); - ip6->dst_address.as_u64[0] = inner_ip6->src_address.as_u64[0]; - ip6->dst_address.as_u64[1] = inner_ip6->src_address.as_u64[1]; - } - - return 0; -} - -static int -nat64_out2in_inner_icmp_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, - void *arg) -{ - nat64_main_t *nm = &nat64_main; - nat64_out2in_set_ctx_t *ctx = arg; - nat64_db_bib_entry_t *bibe; - nat64_db_st_entry_t *ste; - ip46_address_t saddr, daddr; - u32 sw_if_index, fib_index; - u8 proto = ip4->protocol; - - sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; - fib_index = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index); - - memset (&saddr, 0, sizeof (saddr)); - saddr.ip4.as_u32 = ip4->src_address.as_u32; - memset (&daddr, 0, sizeof (daddr)); - daddr.ip4.as_u32 = ip4->dst_address.as_u32; - - if (proto == IP_PROTOCOL_ICMP6) - { - icmp46_header_t *icmp = ip4_next_header (ip4); - u16 out_id = ((u16 *) (icmp))[2]; - proto = IP_PROTOCOL_ICMP; - - if (! - (icmp->type == ICMP6_echo_request - || icmp->type == ICMP6_echo_reply)) - return -1; - - ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, out_id, 0, proto, - fib_index, 0); - if (!ste) - return -1; - - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - - ip6->dst_address.as_u64[0] = ste->in_r_addr.as_u64[0]; - ip6->dst_address.as_u64[1] = ste->in_r_addr.as_u64[1]; - ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0]; - ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1]; - ((u16 *) (icmp))[2] = bibe->in_port; - - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index; - } - else - { - udp_header_t *udp = ip4_next_header (ip4); - tcp_header_t *tcp = ip4_next_header (ip4); - u16 dport = udp->dst_port; - u16 sport = udp->src_port; - u16 *checksum; - ip_csum_t csum; - - ste = - nat64_db_st_entry_find (&nm->db, &saddr, &daddr, sport, dport, proto, - fib_index, 0); - if (!ste) - return -1; - - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - - nat64_compose_ip6 (&ip6->dst_address, &daddr.ip4, bibe->fib_index); - ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0]; - ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1]; - udp->src_port = bibe->in_port; - - if (proto == IP_PROTOCOL_UDP) - checksum = &udp->checksum; - else - checksum = &tcp->checksum; - if (*checksum) - { - csum = ip_csum_sub_even (*checksum, sport); - csum = ip_csum_add_even (csum, udp->src_port); - *checksum = ip_csum_fold (csum); - } - - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index; - } - - return 0; -} - -static int -nat64_out2in_unk_proto_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, - void *arg) -{ - nat64_main_t *nm = &nat64_main; - nat64_out2in_set_ctx_t *ctx = arg; - nat64_db_bib_entry_t *bibe; - nat64_db_st_entry_t *ste; - ip46_address_t saddr, daddr; - ip6_address_t ip6_saddr; - u32 sw_if_index, fib_index; - u8 proto = ip4->protocol; - - sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX]; - fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - - memset (&saddr, 0, sizeof (saddr)); - saddr.ip4.as_u32 = ip4->src_address.as_u32; - memset (&daddr, 0, sizeof (daddr)); - daddr.ip4.as_u32 = ip4->dst_address.as_u32; - - ste = - nat64_db_st_entry_find (&nm->db, &daddr, &saddr, 0, 0, proto, fib_index, - 0); - if (ste) - { - bibe = nat64_db_bib_entry_by_index (&nm->db, proto, ste->bibe_index); - if (!bibe) - return -1; - } - else - { - bibe = - nat64_db_bib_entry_find (&nm->db, &daddr, 0, proto, fib_index, 0); - - if (!bibe) - return -1; - - nat64_compose_ip6 (&ip6_saddr, &ip4->src_address, bibe->fib_index); - ste = - nat64_db_st_entry_create (&nm->db, bibe, &ip6_saddr, &saddr.ip4, 0); - } - - nat64_session_reset_timeout (ste, ctx->vm); - - ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0]; - ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1]; - - ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0]; - ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1]; - - vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index; - - return 0; -} - -static uword -nat64_out2in_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - nat64_out2in_next_t next_index; - u32 pkts_processed = 0; - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0; - ip4_header_t *ip40; - u32 proto0; - nat64_out2in_set_ctx_t ctx0; - - /* 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); - ip40 = vlib_buffer_get_current (b0); - - ctx0.b = b0; - ctx0.vm = vm; - - next0 = NAT64_OUT2IN_NEXT_LOOKUP; - - proto0 = ip_proto_to_snat_proto (ip40->protocol); - - if (proto0 == SNAT_PROTOCOL_ICMP) - { - if (icmp_to_icmp6 - (b0, nat64_out2in_icmp_set_cb, &ctx0, - nat64_out2in_inner_icmp_set_cb, &ctx0)) - { - next0 = NAT64_OUT2IN_NEXT_DROP; - b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace0; - } - } - else if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP) - { - if (ip4_to_ip6_tcp_udp (b0, nat64_out2in_tcp_udp_set_cb, &ctx0)) - { - next0 = NAT64_OUT2IN_NEXT_DROP; - b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace0; - } - } - else - { - if (ip4_to_ip6 (b0, nat64_out2in_unk_proto_set_cb, &ctx0)) - { - next0 = NAT64_OUT2IN_NEXT_DROP; - b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace0; - } - } - - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat64_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - t->next_index = next0; - } - - pkts_processed += next0 != NAT64_OUT2IN_NEXT_DROP; - - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, - n_left_to_next, bi0, next0); - } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - vlib_node_increment_counter (vm, nat64_out2in_node.index, - NAT64_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (nat64_out2in_node) = { - .function = nat64_out2in_node_fn, - .name = "nat64-out2in", - .vector_size = sizeof (u32), - .format_trace = format_nat64_out2in_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - .n_errors = ARRAY_LEN (nat64_out2in_error_strings), - .error_strings = nat64_out2in_error_strings,.n_next_nodes = 2, - /* edit / add dispositions here */ - .next_nodes = { - [NAT64_OUT2IN_NEXT_DROP] = "error-drop", - [NAT64_OUT2IN_NEXT_LOOKUP] = "ip6-lookup", - }, -}; -/* *INDENT-ON* */ - -VLIB_NODE_FUNCTION_MULTIARCH (nat64_out2in_node, nat64_out2in_node_fn); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg