/* * Copyright (c) 2020 Doc.ai and/or its affiliates. * Copyright (c) 2020 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. */ #include <vlib/vlib.h> #include <vnet/vnet.h> #include <vppinfra/error.h> #include <wireguard/wireguard.h> #include <wireguard/wireguard_send.h> #define foreach_wg_output_error \ _ (NONE, "No error") \ _ (PEER, "Peer error") \ _ (KEYPAIR, "Keypair error") \ _ (NO_BUFFERS, "No buffers") \ _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") typedef enum { #define _(sym,str) WG_OUTPUT_ERROR_##sym, foreach_wg_output_error #undef _ WG_OUTPUT_N_ERROR, } wg_output_error_t; static char *wg_output_error_strings[] = { #define _(sym,string) string, foreach_wg_output_error #undef _ }; typedef enum { WG_OUTPUT_NEXT_ERROR, WG_OUTPUT_NEXT_HANDOFF, WG_OUTPUT_NEXT_INTERFACE_OUTPUT, WG_OUTPUT_N_NEXT, } wg_output_next_t; typedef struct { index_t peer; u8 header[sizeof (ip6_udp_header_t)]; u8 is_ip4; } wg_output_tun_trace_t; typedef struct { index_t peer; u32 next_index; } wg_output_tun_post_trace_t; u8 * format_ip4_udp_header (u8 * s, va_list * args) { ip4_udp_header_t *hdr4 = va_arg (*args, ip4_udp_header_t *); s = format (s, "%U:$U", format_ip4_header, &hdr4->ip4, format_udp_header, &hdr4->udp); return (s); } u8 * format_ip6_udp_header (u8 *s, va_list *args) { ip6_udp_header_t *hdr6 = va_arg (*args, ip6_udp_header_t *); s = format (s, "%U:$U", format_ip6_header, &hdr6->ip6, format_udp_header, &hdr6->udp); return (s); } /* packet trace format function */ static u8 * format_wg_output_tun_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 *); wg_output_tun_trace_t *t = va_arg (*args, wg_output_tun_trace_t *); s = format (s, "peer: %d\n", t->peer); s = format (s, " Encrypted packet: "); s = t->is_ip4 ? format (s, "%U", format_ip4_udp_header, t->header) : format (s, "%U", format_ip6_udp_header, t->header); return s; } /* post node - packet trace format function */ static u8 * format_wg_output_tun_post_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 *); wg_output_tun_post_trace_t *t = va_arg (*args, wg_output_tun_post_trace_t *); s = format (s, "peer: %d\n", t->peer); s = format (s, " wg-post: next node index %u", t->next_index); return s; } static_always_inline void wg_output_chain_crypto (vlib_main_t *vm, wg_per_thread_data_t *ptd, vlib_buffer_t *b, vlib_buffer_t *lb, u8 *start, u32 start_len, u16 *n_ch) { vnet_crypto_op_chunk_t *ch; vlib_buffer_t *cb = b; u32 n_chunks = 1; vec_add2 (ptd->chunks, ch, 1); ch->len = start_len; ch->src = ch->dst = start; cb = vlib_get_buffer (vm, cb->next_buffer); while (1) { vec_add2 (ptd->chunks, ch, 1); n_chunks += 1; if (lb == cb) ch->len = cb->current_length - NOISE_AUTHTAG_LEN; else ch->len = cb->current_length; ch->src = ch->dst = vlib_buffer_get_current (cb); if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT)) break; cb = vlib_get_buffer (vm, cb->next_buffer); } if (n_ch) *n_ch = n_chunks; } static_always_inline void wg_prepare_sync_enc_op (vlib_main_t *vm, wg_per_thread_data_t *ptd, vlib_buffer_t *b, vlib_buffer_t *lb, vnet_crypto_op_t **crypto_ops, u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len, u64 nonce, vnet_crypto_key_index_t key_index, u32 bi, u8 *iv) { vnet_crypto_op_t _op, *op = &_op; u8 src_[] = {}; clib_memset (iv, 0, 4); clib_memcpy (iv + 4, &nonce, sizeof (nonce)); vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES); vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_ENC); op->tag_len = NOISE_AUTHTAG_LEN; op->tag = vlib_buffer_get_tail (lb) - NOISE_AUTHTAG_LEN; op->key_index = key_index; op->aad = aad; op->aad_len = aad_len; op->iv = iv; op->user_data = bi; if (b != lb) { /* Chained buffers */ op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS; op->chunk_index = vec_len (ptd->chunks); wg_output_chain_crypto (vm, ptd, b, lb, src, src_len, &op->n_chunks); } else { op->src = !src ? src_ : src; op->len = src_len; op->dst = dst; } } static_always_inline void wg_output_process_chained_ops (vlib_main_t *vm, vlib_node_runtime_t *node, vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts, vnet_crypto_op_chunk_t *chunks, u16 drop_next) { u32 n_fail, n_ops = vec_len (ops); vnet_crypto_op_t *op = ops; if (n_ops == 0) return; n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops); while (n_fail) { ASSERT (op - ops < n_ops); if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED) { u32 bi = op->user_data; b[bi]->error = node->errors[WG_OUTPUT_ERROR_CRYPTO_ENGINE_ERROR]; nexts[bi] = drop_next; n_fail--; } op++; } } static_always_inline void wg_output_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node, vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts, u16 drop_next) { u32 n_fail, n_ops = vec_len (ops); vnet_crypto_op_t *op = ops; if (n_ops == 0) return; n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops); while (n_fail) { ASSERT (op - ops < n_ops); if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED) { u32 bi = op->user_data; b[bi]->error = node->errors[WG_OUTPUT_ERROR_CRYPTO_ENGINE_ERROR]; nexts[bi] = drop_next; n_fail--; } op++; } } static_always_inline void wg_output_tun_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f, u32 key_index, u32 crypto_len, i16 crypto_start_offset, u32 buffer_index, u16 next_node, u8 *iv, u8 *tag, u8 flags) { vnet_crypto_async_frame_elt_t *fe; u16 index; ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE); index = f->n_elts; fe = &f->elts[index]; f->n_elts++; fe->key_index = key_index; fe->crypto_total_length = crypto_len; fe->crypto_start_offset = crypto_start_offset; fe->iv = iv; fe->tag = tag; fe->flags = flags; f->buffer_indices[index] = buffer_index; f->next_node_index[index] = next_node; } static_always_inline enum noise_state_crypt wg_output_tun_process (vlib_main_t *vm, wg_per_thread_data_t *ptd, vlib_buffer_t *b, vlib_buffer_t *lb, vnet_crypto_op_t **crypto_ops, noise_remote_t *r, uint32_t *r_idx, uint64_t *nonce, uint8_t *src, size_t srclen, uint8_t *dst, u32 bi, u8 *iv, f64 time) { noise_keypair_t *kp; enum noise_state_crypt ret = SC_FAILED; if ((kp = r->r_current) == NULL) goto error; /* We confirm that our values are within our tolerances. We want: * - a valid keypair * - our keypair to be less than REJECT_AFTER_TIME seconds old * - our receive counter to be less than REJECT_AFTER_MESSAGES * - our send counter to be less than REJECT_AFTER_MESSAGES */ if (!kp->kp_valid || wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME, time) || kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES || ((*nonce = noise_counter_send (&kp->kp_ctr)) > REJECT_AFTER_MESSAGES)) goto error; /* We encrypt into the same buffer, so the caller must ensure that buf * has NOISE_AUTHTAG_LEN bytes to store the MAC. The nonce and index * are passed back out to the caller through the provided data pointer. */ *r_idx = kp->kp_remote_index; wg_prepare_sync_enc_op (vm, ptd, b, lb, crypto_ops, src, srclen, dst, NULL, 0, *nonce, kp->kp_send_index, bi, iv); /* If our values are still within tolerances, but we are approaching * the tolerances, we notify the caller with ESTALE that they should * establish a new keypair. The current keypair can continue to be used * until the tolerances are hit. We notify if: * - our send counter is valid and not less than REKEY_AFTER_MESSAGES * - we're the initiator and our keypair is older than * REKEY_AFTER_TIME seconds */ ret = SC_KEEP_KEY_FRESH; if ((kp->kp_valid && *nonce >= REKEY_AFTER_MESSAGES) || (kp->kp_is_initiator && wg_birthdate_has_expired_opt ( kp->kp_birthdate, REKEY_AFTER_TIME, time))) goto error; ret = SC_OK; error: return ret; } static_always_inline enum noise_state_crypt wg_add_to_async_frame (vlib_main_t *vm, wg_per_thread_data_t *ptd, vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b, vlib_buffer_t *lb, u8 *payload, u32 payload_len, u32 bi, u16 next, u16 async_next, noise_remote_t *r, uint32_t *r_idx, uint64_t *nonce, u8 *iv, f64 time) { wg_post_data_t *post = wg_post_data (b); u8 flag = 0; u8 *tag; noise_keypair_t *kp; post->next_index = next; /* crypto */ enum noise_state_crypt ret = SC_FAILED; if ((kp = r->r_current) == NULL) goto error; /* We confirm that our values are within our tolerances. We want: * - a valid keypair * - our keypair to be less than REJECT_AFTER_TIME seconds old * - our receive counter to be less than REJECT_AFTER_MESSAGES * - our send counter to be less than REJECT_AFTER_MESSAGES */ if (!kp->kp_valid || wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME, time) || kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES || ((*nonce = noise_counter_send (&kp->kp_ctr)) > REJECT_AFTER_MESSAGES)) goto error; /* We encrypt into the same buffer, so the caller must ensure that buf * has NOISE_AUTHTAG_LEN bytes to store the MAC. The nonce and index * are passed back out to the caller through the provided data pointer. */ *r_idx = kp->kp_remote_index; clib_memset (iv, 0, 4); clib_memcpy (iv + 4, nonce, sizeof (*nonce)); /* get a frame for this op if we don't yet have one or it's full */ if (NULL == *async_frame || vnet_crypto_async_frame_is_full (*async_frame)) { *async_frame = vnet_crypto_async_get_frame ( vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_ENC); if (PREDICT_FALSE (NULL == *async_frame)) goto error; /* Save the frame to the list we'll submit at the end */ vec_add1 (ptd->async_frames, *async_frame); } if (b != lb) flag |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS; tag = vlib_buffer_get_tail (lb) - NOISE_AUTHTAG_LEN; /* this always succeeds because we know the frame is not full */ wg_output_tun_add_to_frame (vm, *async_frame, kp->kp_send_index, payload_len, payload - b->data, bi, async_next, iv, tag, flag); /* If our values are still within tolerances, but we are approaching * the tolerances, we notify the caller with ESTALE that they should * establish a new keypair. The current keypair can continue to be used * until the tolerances are hit. We notify if: * - our send counter is valid and not less than REKEY_AFTER_MESSAGES * - we're the initiator and our keypair is older than * REKEY_AFTER_TIME seconds */ ret = SC_KEEP_KEY_FRESH; if ((kp->kp_valid && *nonce >= REKEY_AFTER_MESSAGES) || (kp->kp_is_initiator && wg_birthdate_has_expired_opt ( kp->kp_birthdate, REKEY_AFTER_TIME, time))) goto error; ret = SC_OK; error: return ret; } static_always_inline void wg_calc_checksum (vlib_main_t *vm, vlib_buffer_t *b) { int bogus = 0; u8 ip_ver_out = (*((u8 *) vlib_buffer_get_current (b)) >> 4); /* IPv6 UDP checksum is mandatory */ if (ip_ver_out == 6) { ip6_header_t *ip6 = (ip6_header_t *) ((u8 *) vlib_buffer_get_current (b)); udp_header_t *udp = ip6_next_header (ip6); udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); } } /* is_ip4 - inner header flag */ always_inline uword wg_output_tun_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, u8 is_ip4, u16 async_next_node) { wg_main_t *wmp = &wg_main; wg_per_thread_data_t *ptd = vec_elt_at_index (wmp->per_thread_data, vm->thread_index); u32 *from = vlib_frame_vector_args (frame); u32 n_left_from = frame->n_vectors; ip4_udp_wg_header_t *hdr4_out = NULL; ip6_udp_wg_header_t *hdr6_out = NULL; message_data_t *message_data_wg = NULL; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; vlib_buffer_t *lb; vnet_crypto_op_t **crypto_ops; u16 nexts[VLIB_FRAME_SIZE], *next = nexts; vlib_buffer_t *sync_bufs[VLIB_FRAME_SIZE]; u32 thread_index = vm->thread_index; u16 n_sync = 0; const u16 drop_next = WG_OUTPUT_NEXT_ERROR; const u8 is_async = wg_op_mode_is_set_ASYNC (); vnet_crypto_async_frame_t *async_frame = NULL; u16 n_async = 0; u16 noop_nexts[VLIB_FRAME_SIZE], *noop_next = noop_nexts, n_noop = 0; u16 err = !0; u32 sync_bi[VLIB_FRAME_SIZE]; u32 noop_bi[VLIB_FRAME_SIZE]; vlib_get_buffers (vm, from, bufs, n_left_from); vec_reset_length (ptd->crypto_ops); vec_reset_length (ptd->chained_crypto_ops); vec_reset_length (ptd->chunks); vec_reset_length (ptd->async_frames); wg_peer_t *peer = NULL; u32 adj_index = 0; u32 last_adj_index = ~0; index_t peeri = INDEX_INVALID; f64 time = clib_time_now (&vm->clib_time) + vm->time_offset; while (n_left_from > 0) { u8 iph_offset = 0; u8 is_ip4_out = 1; u8 *plain_data; u16 plain_data_len; u16 plain_data_len_total; u16 n_bufs; u16 b_space_left_at_beginning; u32 bi = from[b - bufs]; if (n_left_from > 2) { u8 *p; vlib_prefetch_buffer_header (b[2], LOAD); p = vlib_buffer_get_current (b[1]); CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES, LOAD); } noop_next[0] = WG_OUTPUT_NEXT_ERROR; err = WG_OUTPUT_NEXT_ERROR; adj_index = vnet_buffer (b[0])->ip.adj_index[VLIB_TX]; if (PREDICT_FALSE (last_adj_index != adj_index)) { peeri = wg_peer_get_by_adj_index (adj_index); if (peeri == INDEX_INVALID) { b[0]->error = node->errors[WG_OUTPUT_ERROR_PEER]; goto out; } peer = wg_peer_get (peeri); } if (!peer || wg_peer_is_dead (peer)) { b[0]->error = node->errors[WG_OUTPUT_ERROR_PEER]; goto out; } if (PREDICT_FALSE (~0 == peer->output_thread_index)) { /* this is the first packet to use this peer, claim the peer * for this thread. */ clib_atomic_cmp_and_swap (&peer->output_thread_index, ~0, wg_peer_assign_thread (thread_index)); } if (PREDICT_FALSE (thread_index != peer->output_thread_index)) { noop_next[0] = WG_OUTPUT_NEXT_HANDOFF; err = WG_OUTPUT_NEXT_HANDOFF; goto next; } if (PREDICT_FALSE (!peer->remote.r_current)) { wg_send_handshake_from_mt (peeri, false); b[0]->error = node->errors[WG_OUTPUT_ERROR_KEYPAIR]; goto out; } lb = b[0]; n_bufs = vlib_buffer_chain_linearize (vm, b[0]); if (n_bufs == 0) { b[0]->error = node->errors[WG_OUTPUT_ERROR_NO_BUFFERS]; goto out; } if (n_bufs > 1) { /* Find last buffer in the chain */ while (lb->flags & VLIB_BUFFER_NEXT_PRESENT) lb = vlib_get_buffer (vm, lb->next_buffer); } /* Ensure there is enough free space at the beginning of the first buffer * to write ethernet header (e.g. IPv6 VxLAN over IPv6 Wireguard will * trigger this) */ ASSERT ((signed) b[0]->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE); b_space_left_at_beginning = b[0]->current_data + VLIB_BUFFER_PRE_DATA_SIZE; if (PREDICT_FALSE (b_space_left_at_beginning < sizeof (ethernet_header_t))) { u32 size_diff = sizeof (ethernet_header_t) - b_space_left_at_beginning; /* Can only move buffer when it's single and has enough free space*/ if (lb == b[0] && vlib_buffer_space_left_at_end (vm, b[0]) >= size_diff) { vlib_buffer_move (vm, b[0], b[0]->current_data + (signed) size_diff); } else { b[0]->error = node->errors[WG_OUTPUT_ERROR_NO_BUFFERS]; goto out; } } /* * Ensure there is enough free space at the end of the last buffer to * write auth tag */ if (PREDICT_FALSE (vlib_buffer_space_left_at_end (vm, lb) < NOISE_AUTHTAG_LEN)) { u32 tmp_bi = 0; if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1) { b[0]->error = node->errors[WG_OUTPUT_ERROR_NO_BUFFERS]; goto out; } lb = vlib_buffer_chain_buffer (vm, lb, tmp_bi); } iph_offset = vnet_buffer (b[0])->ip.save_rewrite_length; plain_data = vlib_buffer_get_current (b[0]) + iph_offset; plain_data_len = b[0]->current_length - iph_offset; plain_data_len_total = vlib_buffer_length_in_chain (vm, b[0]) - iph_offset; size_t encrypted_packet_len = message_data_len (plain_data_len_total); vlib_buffer_chain_increase_length (b[0], lb, NOISE_AUTHTAG_LEN); u8 *iv_data = b[0]->pre_data; is_ip4_out = ip46_address_is_ip4 (&peer->src.addr); if (is_ip4_out) { hdr4_out = vlib_buffer_get_current (b[0]); message_data_wg = &hdr4_out->wg; } else { hdr6_out = vlib_buffer_get_current (b[0]); message_data_wg = &hdr6_out->wg; } if (PREDICT_FALSE (last_adj_index != adj_index)) { wg_timers_any_authenticated_packet_sent_opt (peer, time); wg_timers_data_sent_opt (peer, time); wg_timers_any_authenticated_packet_traversal (peer); last_adj_index = adj_index; } /* Here we are sure that can send packet to next node */ next[0] = WG_OUTPUT_NEXT_INTERFACE_OUTPUT; if (lb != b[0]) crypto_ops = &ptd->chained_crypto_ops; else crypto_ops = &ptd->crypto_ops; enum noise_state_crypt state; if (is_async) { state = wg_add_to_async_frame ( vm, ptd, &async_frame, b[0], lb, plain_data, plain_data_len_total, bi, next[0], async_next_node, &peer->remote, &message_data_wg->receiver_index, &message_data_wg->counter, iv_data, time); } else { state = wg_output_tun_process ( vm, ptd, b[0], lb, crypto_ops, &peer->remote, &message_data_wg->receiver_index, &message_data_wg->counter, plain_data, plain_data_len, plain_data, n_sync, iv_data, time); } if (PREDICT_FALSE (state == SC_KEEP_KEY_FRESH)) { wg_send_handshake_from_mt (peeri, false); } else if (PREDICT_FALSE (state == SC_FAILED)) { // TODO: Maybe wrong wg_send_handshake_from_mt (peeri, false); wg_peer_update_flags (peeri, WG_PEER_ESTABLISHED, false); noop_next[0] = WG_OUTPUT_NEXT_ERROR; goto out; } err = WG_OUTPUT_NEXT_INTERFACE_OUTPUT; if (is_ip4_out) { hdr4_out->wg.header.type = MESSAGE_DATA; hdr4_out->udp.length = clib_host_to_net_u16 (encrypted_packet_len + sizeof (udp_header_t)); ip4_header_set_len_w_chksum ( &hdr4_out->ip4, clib_host_to_net_u16 (encrypted_packet_len + sizeof (ip4_udp_header_t))); } else { hdr6_out->wg.header.type = MESSAGE_DATA; hdr6_out->ip6.payload_length = hdr6_out->udp.length = clib_host_to_net_u16 (encrypted_packet_len + sizeof (udp_header_t)); } out: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) { wg_output_tun_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->peer = peeri; t->is_ip4 = is_ip4_out; if (hdr4_out) clib_memcpy (t->header, hdr4_out, sizeof (ip4_udp_header_t)); else if (hdr6_out) clib_memcpy (t->header, hdr6_out, sizeof (ip6_udp_header_t)); } next: if (PREDICT_FALSE (err != WG_OUTPUT_NEXT_INTERFACE_OUTPUT)) { noop_bi[n_noop] = bi; n_noop++; noop_next++; goto next_left; } if (!is_async) { sync_bi[n_sync] = bi; sync_bufs[n_sync] = b[0]; n_sync += 1; next += 1; } else { n_async++; } next_left: n_left_from -= 1; b += 1; } if (n_sync) { /* wg-output-process-ops */ wg_output_process_ops (vm, node, ptd->crypto_ops, sync_bufs, nexts, drop_next); wg_output_process_chained_ops (vm, node, ptd->chained_crypto_ops, sync_bufs, nexts, ptd->chunks, drop_next); int n_left_from_sync_bufs = n_sync; while (n_left_from_sync_bufs > 0) { n_left_from_sync_bufs--; wg_calc_checksum (vm, sync_bufs[n_left_from_sync_bufs]); } vlib_buffer_enqueue_to_next (vm, node, sync_bi, nexts, n_sync); } if (n_async) { /* submit all of the open frames */ vnet_crypto_async_frame_t **async_frame; vec_foreach (async_frame, ptd->async_frames) { if (PREDICT_FALSE ( vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0)) { u32 n_drop = (*async_frame)->n_elts; u32 *bi = (*async_frame)->buffer_indices; u16 index = n_noop; while (n_drop--) { noop_bi[index] = bi[0]; vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]); noop_nexts[index] = drop_next; b->error = node->errors[WG_OUTPUT_ERROR_CRYPTO_ENGINE_ERROR]; bi++; index++; } n_noop += (*async_frame)->n_elts; vnet_crypto_async_reset_frame (*async_frame); vnet_crypto_async_free_frame (vm, *async_frame); } } } if (n_noop) { vlib_buffer_enqueue_to_next (vm, node, noop_bi, noop_nexts, n_noop); } return frame->n_vectors; } always_inline uword wg_output_tun_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) { vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u16 nexts[VLIB_FRAME_SIZE], *next = nexts; u32 *from = vlib_frame_vector_args (frame); u32 n_left = frame->n_vectors; index_t peeri = ~0; vlib_get_buffers (vm, from, b, n_left); if (n_left >= 4) { vlib_prefetch_buffer_header (b[0], LOAD); vlib_prefetch_buffer_header (b[1], LOAD); vlib_prefetch_buffer_header (b[2], LOAD); vlib_prefetch_buffer_header (b[3], LOAD); } while (n_left > 8) { vlib_prefetch_buffer_header (b[4], LOAD); vlib_prefetch_buffer_header (b[5], LOAD); vlib_prefetch_buffer_header (b[6], LOAD); vlib_prefetch_buffer_header (b[7], LOAD); next[0] = (wg_post_data (b[0]))->next_index; next[1] = (wg_post_data (b[1]))->next_index; next[2] = (wg_post_data (b[2]))->next_index; next[3] = (wg_post_data (b[3]))->next_index; wg_calc_checksum (vm, b[0]); wg_calc_checksum (vm, b[1]); wg_calc_checksum (vm, b[2]); wg_calc_checksum (vm, b[3]); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) { if (b[0]->flags & VLIB_BUFFER_IS_TRACED) { wg_output_tun_post_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); peeri = wg_peer_get_by_adj_index ( vnet_buffer (b[0])->ip.adj_index[VLIB_TX]); tr->peer = peeri; tr->next_index = next[0]; } if (b[1]->flags & VLIB_BUFFER_IS_TRACED) { wg_output_tun_post_trace_t *tr = vlib_add_trace (vm, node, b[1], sizeof (*tr)); peeri = wg_peer_get_by_adj_index ( vnet_buffer (b[1])->ip.adj_index[VLIB_TX]); tr->next_index = next[1]; } if (b[2]->flags & VLIB_BUFFER_IS_TRACED) { wg_output_tun_post_trace_t *tr = vlib_add_trace (vm, node, b[2], sizeof (*tr)); peeri = wg_peer_get_by_adj_index ( vnet_buffer (b[2])->ip.adj_index[VLIB_TX]); tr->next_index = next[2]; } if (b[3]->flags & VLIB_BUFFER_IS_TRACED) { wg_output_tun_post_trace_t *tr = vlib_add_trace (vm, node, b[3], sizeof (*tr)); peeri = wg_peer_get_by_adj_index ( vnet_buffer (b[3])->ip.adj_index[VLIB_TX]); tr->next_index = next[3]; } } b += 4; next += 4; n_left -= 4; } while (n_left > 0) { wg_calc_checksum (vm, b[0]); next[0] = (wg_post_data (b[0]))->next_index; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b[0]->flags & VLIB_BUFFER_IS_TRACED))) { wg_output_tun_post_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); peeri = wg_peer_get_by_adj_index ( vnet_buffer (b[0])->ip.adj_index[VLIB_TX]); tr->next_index = next[0]; } b += 1; next += 1; n_left -= 1; } vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); return frame->n_vectors; } VLIB_REGISTER_NODE (wg4_output_tun_post_node) = { .name = "wg4-output-tun-post-node", .vector_size = sizeof (u32), .format_trace = format_wg_output_tun_post_trace, .type = VLIB_NODE_TYPE_INTERNAL, .sibling_of = "wg4-output-tun", .n_errors = ARRAY_LEN (wg_output_error_strings), .error_strings = wg_output_error_strings, }; VLIB_REGISTER_NODE (wg6_output_tun_post_node) = { .name = "wg6-output-tun-post-node", .vector_size = sizeof (u32), .format_trace = format_wg_output_tun_post_trace, .type = VLIB_NODE_TYPE_INTERNAL, .sibling_of = "wg6-output-tun", .n_errors = ARRAY_LEN (wg_output_error_strings), .error_strings = wg_output_error_strings, }; VLIB_NODE_FN (wg4_output_tun_post_node) (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame) { return wg_output_tun_post (vm, node, from_frame); } VLIB_NODE_FN (wg6_output_tun_post_node) (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame) { return wg_output_tun_post (vm, node, from_frame); } VLIB_NODE_FN (wg4_output_tun_node) (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) { return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 1, wg_encrypt_async_next.wg4_post_next); } VLIB_NODE_FN (wg6_output_tun_node) (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) { return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 0, wg_encrypt_async_next.wg6_post_next); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (wg4_output_tun_node) = { .name = "wg4-output-tun", .vector_size = sizeof (u32), .format_trace = format_wg_output_tun_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (wg_output_error_strings), .error_strings = wg_output_error_strings, .n_next_nodes = WG_OUTPUT_N_NEXT, .next_nodes = { [WG_OUTPUT_NEXT_HANDOFF] = "wg4-output-tun-handoff", [WG_OUTPUT_NEXT_INTERFACE_OUTPUT] = "adj-midchain-tx", [WG_OUTPUT_NEXT_ERROR] = "error-drop", }, }; VLIB_REGISTER_NODE (wg6_output_tun_node) = { .name = "wg6-output-tun", .vector_size = sizeof (u32), .format_trace = format_wg_output_tun_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (wg_output_error_strings), .error_strings = wg_output_error_strings, .n_next_nodes = WG_OUTPUT_N_NEXT, .next_nodes = { [WG_OUTPUT_NEXT_HANDOFF] = "wg6-output-tun-handoff", [WG_OUTPUT_NEXT_INTERFACE_OUTPUT] = "adj-midchain-tx", [WG_OUTPUT_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */