X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp_encrypt.c;h=7df537a555580f9ded2c8daefc8146c49da38add;hp=186e122793dd5edce837549da91a43d40b5e166c;hb=282872127;hpb=8cdb1a0a698e2a51c9151401de4a57cae2d29d48 diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c index 186e122793d..7df537a5555 100644 --- a/src/vnet/ipsec/esp_encrypt.c +++ b/src/vnet/ipsec/esp_encrypt.c @@ -23,12 +23,12 @@ #include #include +#include #include #define foreach_esp_encrypt_next \ _(DROP, "error-drop") \ -_(IP4_LOOKUP, "ip4-lookup") \ -_(IP6_LOOKUP, "ip6-lookup") \ +_(HANDOFF, "handoff") \ _(INTERFACE_OUTPUT, "interface-output") #define _(v, s) ESP_ENCRYPT_NEXT_##v, @@ -43,7 +43,7 @@ typedef enum _(RX_PKTS, "ESP pkts received") \ _(SEQ_CYCLED, "sequence number cycled (packet dropped)") \ _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \ - _(CHAINED_BUFFER, "chained buffers (packet dropped)") \ + _(NO_BUFFERS, "no buffers (packet dropped)") \ _(NO_TRAILER_SPACE, "no trailer space (packet dropped)") typedef enum @@ -93,31 +93,37 @@ format_esp_encrypt_trace (u8 * s, va_list * args) static_always_inline u8 * esp_add_footer_and_icv (vlib_buffer_t * b, u8 block_size, u8 icv_sz, u16 * next, vlib_node_runtime_t * node, - u16 buffer_data_size) + u16 buffer_data_size, uword total_len) { static const u8 pad_data[ESP_MAX_BLOCK_SIZE] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x00, 0x00, }; - u16 min_length = b->current_length + sizeof (esp_footer_t); + u16 min_length = total_len + sizeof (esp_footer_t); u16 new_length = round_pow2 (min_length, block_size); u8 pad_bytes = new_length - min_length; esp_footer_t *f = (esp_footer_t *) (vlib_buffer_get_current (b) + - new_length - sizeof (esp_footer_t)); + b->current_length + pad_bytes); + u16 tail_sz = sizeof (esp_footer_t) + pad_bytes + icv_sz; - if (b->current_data + new_length + icv_sz > buffer_data_size) + if (b->current_data + tail_sz > buffer_data_size) { + // TODO alloc new buffer b->error = node->errors[ESP_ENCRYPT_ERROR_NO_TRAILER_SPACE]; next[0] = ESP_ENCRYPT_NEXT_DROP; return 0; } if (pad_bytes) - clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes); + { + ASSERT (pad_bytes <= ESP_MAX_BLOCK_SIZE); + pad_bytes = clib_min (ESP_MAX_BLOCK_SIZE, pad_bytes); + clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes); + } f->pad_length = pad_bytes; - b->current_length = new_length + icv_sz; + b->current_length += tail_sz; return &f->next_header; } @@ -173,17 +179,19 @@ ext_hdr_is_pre_esp (u8 nexthdr) } static_always_inline u8 -esp_get_ip6_hdr_len (ip6_header_t * ip6) +esp_get_ip6_hdr_len (ip6_header_t * ip6, ip6_ext_header_t ** ext_hdr) { /* this code assumes that HbH, route and frag headers will be before others, if that is not the case, they will end up encrypted */ - u8 len = sizeof (ip6_header_t); ip6_ext_header_t *p; /* if next packet doesn't have ext header */ if (ext_hdr_is_pre_esp (ip6->protocol) == 0) - return len; + { + *ext_hdr = NULL; + return len; + } p = (void *) (ip6 + 1); len += ip6_ext_header_len (p); @@ -194,9 +202,38 @@ esp_get_ip6_hdr_len (ip6_header_t * ip6) p = ip6_ext_next_header (p); } + *ext_hdr = p; return len; } +static_always_inline void +esp_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) +{ + 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[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR]; + nexts[bi] = ESP_ENCRYPT_NEXT_DROP; + n_fail--; + } + op++; + } +} + static_always_inline void esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node, vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts) @@ -249,10 +286,17 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, u32 current_sa_bytes = 0, spi = 0; u8 block_sz = 0, iv_sz = 0, icv_sz = 0; ipsec_sa_t *sa0 = 0; + vnet_crypto_op_chunk_t *ch; + vlib_buffer_t *lb; + vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops; + vnet_crypto_op_t **integ_ops = &ptd->integ_ops; vlib_get_buffers (vm, from, b, n_left); vec_reset_length (ptd->crypto_ops); vec_reset_length (ptd->integ_ops); + vec_reset_length (ptd->chained_crypto_ops); + vec_reset_length (ptd->chained_integ_ops); + vec_reset_length (ptd->chunks); while (n_left > 0) { @@ -260,8 +304,8 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, dpo_id_t *dpo; esp_header_t *esp; u8 *payload, *next_hdr_ptr; - u16 payload_len; - u32 hdr_len; + u16 payload_len, payload_len_total, n_bufs; + u32 hdr_len, config_index; if (n_left > 2) { @@ -276,11 +320,13 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (is_tun) { /* we are on a ipsec tunnel's feature arc */ - u32 next0; - sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0], - sizeof - (sa_index0)); + u32 next0 = 0; + config_index = b[0]->current_config_index; + vnet_feature_next (&next0, b[0]); next[0] = next0; + vnet_buffer (b[0])->ipsec.sad_index = + sa_index0 = ipsec_tun_protect_get_sa_out + (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]); } else sa_index0 = vnet_buffer (b[0])->ipsec.sad_index; @@ -302,13 +348,49 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, iv_sz = sa0->crypto_iv_size; } - if (vlib_buffer_chain_linearize (vm, b[0]) != 1) + if (PREDICT_FALSE (~0 == sa0->encrypt_thread_index)) + { + /* this is the first packet to use this SA, claim the SA + * for this thread. this could happen simultaneously on + * another thread */ + clib_atomic_cmp_and_swap (&sa0->encrypt_thread_index, ~0, + ipsec_sa_assign_thread (thread_index)); + } + + if (PREDICT_TRUE (thread_index != sa0->encrypt_thread_index)) + { + next[0] = ESP_ENCRYPT_NEXT_HANDOFF; + if (is_tun) + { + b[0]->current_config_index = config_index; + } + goto trace; + } + + lb = b[0]; + n_bufs = vlib_buffer_chain_linearize (vm, b[0]); + if (n_bufs == 0) { - b[0]->error = node->errors[ESP_ENCRYPT_ERROR_CHAINED_BUFFER]; + b[0]->error = node->errors[ESP_ENCRYPT_ERROR_NO_BUFFERS]; next[0] = ESP_ENCRYPT_NEXT_DROP; goto trace; } + if (n_bufs > 1) + { + crypto_ops = &ptd->chained_crypto_ops; + integ_ops = &ptd->chained_integ_ops; + + /* find last buffer in the chain */ + while (lb->flags & VLIB_BUFFER_NEXT_PRESENT) + lb = vlib_get_buffer (vm, lb->next_buffer); + } + else + { + crypto_ops = &ptd->crypto_ops; + integ_ops = &ptd->integ_ops; + } + if (PREDICT_FALSE (esp_seq_advance (sa0))) { b[0]->error = node->errors[ESP_ENCRYPT_ERROR_SEQ_CYCLED]; @@ -322,12 +404,16 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (ipsec_sa_is_set_IS_TUNNEL (sa0)) { payload = vlib_buffer_get_current (b[0]); - next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz, + next_hdr_ptr = esp_add_footer_and_icv (lb, block_sz, icv_sz, next, node, - buffer_data_size); + buffer_data_size, + vlib_buffer_length_in_chain + (vm, b[0])); if (!next_hdr_ptr) goto trace; + b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID; payload_len = b[0]->current_length; + payload_len_total = vlib_buffer_length_in_chain (vm, b[0]); /* ESP header */ hdr_len += sizeof (*esp); @@ -338,7 +424,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, { hdr_len += sizeof (udp_header_t); esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len), - payload_len + hdr_len); + payload_len_total + hdr_len); } /* IP header */ @@ -351,7 +437,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, clib_memcpy_fast (ip6, &sa0->ip6_hdr, len); *next_hdr_ptr = (is_ip6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP); - len = payload_len + hdr_len - len; + len = payload_len_total + hdr_len - len; ip6->payload_length = clib_net_to_host_u16 (len); } else @@ -363,7 +449,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, clib_memcpy_fast (ip4, &sa0->ip4_hdr, len); *next_hdr_ptr = (is_ip6 ? IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP); - len = payload_len + hdr_len; + len = payload_len_total + hdr_len; esp_update_ip4_hdr (ip4, len, /* is_transport */ 0, 0); } @@ -377,21 +463,27 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, else /* transport mode */ { u8 *l2_hdr, l2_len, *ip_hdr, ip_len; + ip6_ext_header_t *ext_hdr; udp_header_t *udp = 0; u8 *old_ip_hdr = vlib_buffer_get_current (b[0]); ip_len = is_ip6 ? - esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr) : + esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr, &ext_hdr) : ip4_header_bytes ((ip4_header_t *) old_ip_hdr); vlib_buffer_advance (b[0], ip_len); payload = vlib_buffer_get_current (b[0]); - next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz, + next_hdr_ptr = esp_add_footer_and_icv (lb, block_sz, icv_sz, next, node, - buffer_data_size); + buffer_data_size, + vlib_buffer_length_in_chain + (vm, b[0])); if (!next_hdr_ptr) goto trace; + + b[0]->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID; payload_len = b[0]->current_length; + payload_len_total = vlib_buffer_length_in_chain (vm, b[0]); /* ESP header */ hdr_len += sizeof (*esp); @@ -421,23 +513,29 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, else l2_len = 0; - clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len); - if (is_ip6) { - ip6_header_t *ip6 = (ip6_header_t *) (ip_hdr); - *next_hdr_ptr = ip6->protocol; - ip6->protocol = IP_PROTOCOL_IPSEC_ESP; + ip6_header_t *ip6 = (ip6_header_t *) (old_ip_hdr); + if (PREDICT_TRUE (NULL == ext_hdr)) + { + *next_hdr_ptr = ip6->protocol; + ip6->protocol = IP_PROTOCOL_IPSEC_ESP; + } + else + { + *next_hdr_ptr = ext_hdr->next_hdr; + ext_hdr->next_hdr = IP_PROTOCOL_IPSEC_ESP; + } ip6->payload_length = - clib_host_to_net_u16 (payload_len + hdr_len - l2_len - - ip_len); + clib_host_to_net_u16 (payload_len_total + hdr_len - l2_len - + sizeof (ip6_header_t)); } else { u16 len; - ip4_header_t *ip4 = (ip4_header_t *) (ip_hdr); + ip4_header_t *ip4 = (ip4_header_t *) (old_ip_hdr); *next_hdr_ptr = ip4->protocol; - len = payload_len + hdr_len - l2_len; + len = payload_len_total + hdr_len - l2_len; if (udp) { esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1); @@ -447,6 +545,8 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0); } + clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len); + if (!is_tun) next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT; } @@ -457,8 +557,9 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, if (sa0->crypto_enc_op_id) { vnet_crypto_op_t *op; - vec_add2_aligned (ptd->crypto_ops, op, 1, CLIB_CACHE_LINE_BYTES); + vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES); vnet_crypto_op_init (op, sa0->crypto_enc_op_id); + op->src = op->dst = payload; op->key_index = sa0->crypto_key_index; op->len = payload_len - icv_sz; @@ -488,12 +589,42 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, op->iv = payload - iv_sz; op->flags = VNET_CRYPTO_OP_FLAG_INIT_IV; } + + if (lb != b[0]) + { + /* is chained */ + vlib_buffer_t *cb = b[0]; + op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS; + op->chunk_index = vec_len (ptd->chunks); + op->tag = vlib_buffer_get_tail (lb) - icv_sz; + vec_add2 (ptd->chunks, ch, 1); + ch->len = payload_len; + ch->src = ch->dst = payload; + cb = vlib_get_buffer (vm, cb->next_buffer); + op->n_chunks = 1; + + while (1) + { + vec_add2 (ptd->chunks, ch, 1); + op->n_chunks += 1; + if (lb == cb) + ch->len = cb->current_length - icv_sz; + 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 (sa0->integ_op_id) { vnet_crypto_op_t *op; - vec_add2_aligned (ptd->integ_ops, op, 1, CLIB_CACHE_LINE_BYTES); + vec_add2_aligned (integ_ops[0], op, 1, CLIB_CACHE_LINE_BYTES); vnet_crypto_op_init (op, sa0->integ_op_id); op->src = payload - iv_sz - sizeof (esp_header_t); op->digest = payload + payload_len - icv_sz; @@ -501,7 +632,46 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, op->digest_len = icv_sz; op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t); op->user_data = b - bufs; - if (ipsec_sa_is_set_USE_ESN (sa0)) + + if (lb != b[0]) + { + /* is chained */ + op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS; + vlib_buffer_t *cb = b[0]; + op->chunk_index = vec_len (ptd->chunks); + op->digest = vlib_buffer_get_tail (lb) - icv_sz; + vec_add2 (ptd->chunks, ch, 1); + ch->len = payload_len + iv_sz + sizeof (esp_header_t); + ch->src = payload - iv_sz - sizeof (esp_header_t); + cb = vlib_get_buffer (vm, cb->next_buffer); + op->n_chunks = 1; + + while (1) + { + vec_add2 (ptd->chunks, ch, 1); + op->n_chunks += 1; + if (lb == cb) + { + ch->len = cb->current_length - icv_sz; + if (ipsec_sa_is_set_USE_ESN (sa0)) + { + u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi); + clib_memcpy_fast (op->digest, &seq_hi, + sizeof (seq_hi)); + ch->len += sizeof (seq_hi); + } + } + else + ch->len = cb->current_length; + ch->src = vlib_buffer_get_current (cb); + + if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT)) + break; + + cb = vlib_get_buffer (vm, cb->next_buffer); + } + } + else if (ipsec_sa_is_set_USE_ESN (sa0)) { u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi); clib_memcpy_fast (op->digest, &seq_hi, sizeof (seq_hi)); @@ -512,7 +682,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_advance (b[0], 0LL - hdr_len); current_sa_packets += 1; - current_sa_bytes += payload_len; + current_sa_bytes += payload_len_total; trace: if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) @@ -536,8 +706,14 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_increment_combined_counter (&ipsec_sa_counters, thread_index, current_sa_index, current_sa_packets, current_sa_bytes); + esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts); + esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, bufs, nexts, + ptd->chunks); + esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts); + esp_process_chained_ops (vm, node, ptd->chained_integ_ops, bufs, nexts, + ptd->chunks); vlib_node_increment_counter (vm, node->node_index, ESP_ENCRYPT_ERROR_RX_PKTS, frame->n_vectors); @@ -565,9 +741,9 @@ VLIB_REGISTER_NODE (esp4_encrypt_node) = { .n_next_nodes = ESP_ENCRYPT_N_NEXT, .next_nodes = { -#define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n, - foreach_esp_encrypt_next -#undef _ + [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop", + [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-handoff", + [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output", }, }; /* *INDENT-ON* */ @@ -591,9 +767,9 @@ VLIB_REGISTER_NODE (esp6_encrypt_node) = { .n_next_nodes = ESP_ENCRYPT_N_NEXT, .next_nodes = { -#define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n, - foreach_esp_encrypt_next -#undef _ + [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop", + [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-handoff", + [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output", }, }; /* *INDENT-ON* */ @@ -615,9 +791,11 @@ VLIB_REGISTER_NODE (esp4_encrypt_tun_node) = { .n_errors = ARRAY_LEN(esp_encrypt_error_strings), .error_strings = esp_encrypt_error_strings, - .n_next_nodes = 1, + .n_next_nodes = ESP_ENCRYPT_N_NEXT, .next_nodes = { [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop", + [ESP_ENCRYPT_NEXT_HANDOFF] = "esp4-encrypt-tun-handoff", + [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop", }, }; @@ -660,9 +838,11 @@ VLIB_REGISTER_NODE (esp6_encrypt_tun_node) = { .n_errors = ARRAY_LEN(esp_encrypt_error_strings), .error_strings = esp_encrypt_error_strings, - .n_next_nodes = 1, + .n_next_nodes = ESP_ENCRYPT_N_NEXT, .next_nodes = { [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop", + [ESP_ENCRYPT_NEXT_HANDOFF] = "esp6-encrypt-tun-handoff", + [ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "error-drop", }, };