csit - Integration tests

Age	Commit message (Expand)	Author	Files	Lines
2020-02-22	Report: Edit minor details in methodology docs	Vratko Polak	1	-5/+5
2019-09-04	docs: added methodology terminology section to report.	Maciek Konstantynowicz	1	-0/+78

/* * Copyright (c) 2015 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 <srv6-ad/ad.h> /******************************* Packet tracing *******************************/ typedef struct { u32 localsid_index; } srv6_ad_localsid_trace_t; typedef struct { u8 error; ip6_address_t src, dst; } srv6_ad_rewrite_trace_t; static u8 * format_srv6_ad_localsid_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 *); srv6_ad_localsid_trace_t *t = va_arg (*args, srv6_ad_localsid_trace_t *); return format (s, "SRv6-AD-localsid: localsid_index %d", t->localsid_index); } static u8 * format_srv6_ad_rewrite_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 *); srv6_ad_rewrite_trace_t *t = va_arg (*args, srv6_ad_rewrite_trace_t *); if (PREDICT_FALSE (t->error != 0)) { return format (s, "SRv6-AD-rewrite: cache is empty"); } return format (s, "SRv6-AD-rewrite: src %U dst %U", format_ip6_address, &t->src, format_ip6_address, &t->dst); } /***************************** Nodes registration *****************************/ vlib_node_registration_t srv6_ad4_rewrite_node; vlib_node_registration_t srv6_ad6_rewrite_node; /****************************** Packet counters *******************************/ #define foreach_srv6_ad_rewrite_counter \ _(PROCESSED, "srv6-ad rewritten packets") \ _(NO_RW, "(Error) No header for rewriting.") typedef enum { #define _(sym,str) SRV6_AD_REWRITE_COUNTER_##sym, foreach_srv6_ad_rewrite_counter #undef _ SRV6_AD_REWRITE_N_COUNTERS, } srv6_ad_rewrite_counters; static char *srv6_ad_rewrite_counter_strings[] = { #define _(sym,string) string, foreach_srv6_ad_rewrite_counter #undef _ }; /********************************* Next nodes *********************************/ typedef enum { SRV6_AD_LOCALSID_NEXT_ERROR, SRV6_AD_LOCALSID_NEXT_REWRITE4, SRV6_AD_LOCALSID_NEXT_REWRITE6, SRV6_AD_LOCALSID_NEXT_INTERFACE, SRV6_AD_LOCALSID_N_NEXT, } srv6_ad_localsid_next_t; typedef enum { SRV6_AD_REWRITE_NEXT_ERROR, SRV6_AD_REWRITE_NEXT_LOOKUP, SRV6_AD_REWRITE_N_NEXT, } srv6_ad_rewrite_next_t; /******************************* Local SID node *******************************/ /** * @brief Function doing SRH processing for AD behavior */ static_always_inline void end_ad_processing (vlib_buffer_t * b0, ip6_header_t * ip0, ip6_sr_header_t * sr0, ip6_sr_localsid_t * ls0, u32 * next0) { ip6_address_t *new_dst0; u16 total_size; ip6_ext_header_t *next_ext_header; u8 next_hdr; srv6_ad_localsid_t *ls0_mem; if (PREDICT_FALSE (ip0->protocol != IP_PROTOCOL_IPV6_ROUTE || sr0->type != ROUTING_HEADER_TYPE_SR)) { return; } if (PREDICT_FALSE (sr0->segments_left == 0)) { return; } /* Decrement Segments Left and update Destination Address */ sr0->segments_left -= 1; new_dst0 = (ip6_address_t *) (sr0->segments) + sr0->segments_left; ip0->dst_address.as_u64[0] = new_dst0->as_u64[0]; ip0->dst_address.as_u64[1] = new_dst0->as_u64[1]; /* Compute the total size of the IPv6 header and extensions */ total_size = sizeof (ip6_header_t); next_ext_header = (ip6_ext_header_t *) (ip0 + 1); next_hdr = ip0->protocol; while (ip6_ext_hdr (next_hdr)) { total_size += ip6_ext_header_len (next_ext_header); next_hdr = next_ext_header->next_hdr; next_ext_header = ip6_ext_next_header (next_ext_header); } /* Make sure next header is valid */ if (PREDICT_FALSE (next_hdr != IP_PROTOCOL_IPV6 && next_hdr != IP_PROTOCOL_IP_IN_IP && next_hdr != IP_PROTOCOL_IP6_NONXT)) { return; } /* Retrieve SID memory */ ls0_mem = ls0->plugin_mem; /* Cache IP header and extensions */ if (PREDICT_FALSE (total_size > ls0_mem->rw_len)) { vec_validate (ls0_mem->rewrite, total_size - 1); } clib_memcpy_fast (ls0_mem->rewrite, ip0, total_size); ls0_mem->rw_len = total_size; /* Remove IP header and extensions */ vlib_buffer_advance (b0, total_size); if (next_hdr == IP_PROTOCOL_IP6_NONXT) { /* Set output interface */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0_mem->sw_if_index_out; /* Set next node to interface-output */ *next0 = SRV6_AD_LOCALSID_NEXT_INTERFACE; } else { /* Set Xconnect adjacency to VNF */ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0_mem->nh_adj; /* Set next node to ip-rewrite */ *next0 = (next_hdr == IP_PROTOCOL_IPV6) ? SRV6_AD_LOCALSID_NEXT_REWRITE6 : SRV6_AD_LOCALSID_NEXT_REWRITE4; } } /** * @brief SRv6 AD Localsid graph node */ static uword srv6_ad_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 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); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip6_sr_header_t *sr0; ip6_sr_localsid_t *ls0; u32 next0 = SRV6_AD_LOCALSID_NEXT_ERROR; 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); sr0 = (ip6_sr_header_t *) (ip0 + 1); /* Lookup the SR End behavior based on IP DA (adj) */ ls0 = pool_elt_at_index (sm->localsids, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); /* SRH processing */ end_ad_processing (b0, ip0, sr0, ls0, &next0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { srv6_ad_localsid_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr); tr->localsid_index = ls0 - sm->localsids; } /* This increments the SRv6 per LocalSID counters. */ vlib_increment_combined_counter (((next0 == SRV6_AD_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) : &(sm->sr_ls_valid_counters)), vm->thread_index, ls0 - sm->localsids, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); cnt_packets++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (srv6_ad_localsid_node) = { .function = srv6_ad_localsid_fn, .name = "srv6-ad-localsid", .vector_size = sizeof (u32), .format_trace = format_srv6_ad_localsid_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_next_nodes = SRV6_AD_LOCALSID_N_NEXT, .next_nodes = { [SRV6_AD_LOCALSID_NEXT_REWRITE4] = "ip4-rewrite", [SRV6_AD_LOCALSID_NEXT_REWRITE6] = "ip6-rewrite", [SRV6_AD_LOCALSID_NEXT_INTERFACE] = "interface-output", [SRV6_AD_LOCALSID_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /******************************* Rewriting node *******************************/ /** * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword srv6_ad2_rewrite_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *srm = &sr_main; srv6_ad_main_t *sm = &srv6_ad_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 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); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ethernet_header_t *en0; ip6_header_t *ip0 = 0; ip6_sr_localsid_t *ls0; srv6_ad_localsid_t *ls0_mem; u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; 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); en0 = vlib_buffer_get_current (b0); ls0 = pool_elt_at_index (srm->localsids, sm->sw_iface_localsid2[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); ls0_mem = ls0->plugin_mem; if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) { next0 = SRV6_AD_REWRITE_NEXT_ERROR; b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; } else { ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= (ls0_mem->rw_len + b0->current_data)); clib_memcpy_fast (((u8 *) en0) - ls0_mem->rw_len, ls0_mem->rewrite, ls0_mem->rw_len); vlib_buffer_advance (b0, -(word) ls0_mem->rw_len); ip0 = vlib_buffer_get_current (b0); ip0->payload_length = clib_host_to_net_u16 (b0->current_length - sizeof (ip6_header_t)); } if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { srv6_ad_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr); tr->error = 0; if (next0 == SRV6_AD_REWRITE_NEXT_ERROR) { tr->error = 1; } else { clib_memcpy_fast (tr->src.as_u8, ip0->src_address.as_u8, sizeof tr->src.as_u8); clib_memcpy_fast (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof tr->dst.as_u8); } } /* Increment per-SID AD rewrite counters */ vlib_increment_combined_counter (((next0 == SRV6_AD_LOCALSID_NEXT_ERROR) ? &(sm->invalid_counters) : &(sm->valid_counters)), vm->thread_index, ls0_mem->index, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); cnt_packets++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, srv6_ad4_rewrite_node.index, SRV6_AD_REWRITE_COUNTER_PROCESSED, cnt_packets); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (srv6_ad2_rewrite_node) = { .function = srv6_ad2_rewrite_fn, .name = "srv6-ad2-rewrite", .vector_size = sizeof (u32), .format_trace = format_srv6_ad_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SRV6_AD_REWRITE_N_COUNTERS, .error_strings = srv6_ad_rewrite_counter_strings, .n_next_nodes = SRV6_AD_REWRITE_N_NEXT, .next_nodes = { [SRV6_AD_REWRITE_NEXT_LOOKUP] = "ip6-lookup", [SRV6_AD_REWRITE_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /** * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword srv6_ad4_rewrite_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *srm = &sr_main; srv6_ad_main_t *sm = &srv6_ad_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 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); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip4_header_t *ip0_encap = 0; ip6_header_t *ip0 = 0; ip6_sr_localsid_t *ls0; srv6_ad_localsid_t *ls0_mem; u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; u16 new_l0 = 0; 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_encap = vlib_buffer_get_current (b0); ls0 = pool_elt_at_index (srm->localsids, sm->sw_iface_localsid4[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); ls0_mem = ls0->plugin_mem; if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) { next0 = SRV6_AD_REWRITE_NEXT_ERROR; b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; } else { ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= (ls0_mem->rw_len + b0->current_data)); clib_memcpy_fast (((u8 *) ip0_encap) - ls0_mem->rw_len, ls0_mem->rewrite, ls0_mem->rw_len); vlib_buffer_advance (b0, -(word) ls0_mem->rw_len); ip0 = vlib_buffer_get_current (b0); /* Update inner IPv4 TTL and checksum */ u32 checksum0; ip0_encap->ttl -= 1; checksum0 = ip0_encap->checksum + clib_host_to_net_u16 (0x0100); checksum0 += checksum0 >= 0xffff; ip0_encap->checksum = checksum0; /* Update outer IPv6 length (in case it has changed) */ new_l0 = ls0_mem->rw_len - sizeof (ip6_header_t) + clib_net_to_host_u16 (ip0_encap->length); ip0->payload_length = clib_host_to_net_u16 (new_l0); } if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { srv6_ad_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr); tr->error = 0; if (next0 == SRV6_AD_REWRITE_NEXT_ERROR) { tr->error = 1; } else { clib_memcpy_fast (tr->src.as_u8, ip0->src_address.as_u8, sizeof tr->src.as_u8); clib_memcpy_fast (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof tr->dst.as_u8); } } /* Increment per-SID AD rewrite counters */ vlib_increment_combined_counter (((next0 == SRV6_AD_LOCALSID_NEXT_ERROR) ? &(sm->invalid_counters) : &(sm->valid_counters)), vm->thread_index, ls0_mem->index, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); cnt_packets++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, srv6_ad4_rewrite_node.index, SRV6_AD_REWRITE_COUNTER_PROCESSED, cnt_packets); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (srv6_ad4_rewrite_node) = { .function = srv6_ad4_rewrite_fn, .name = "srv6-ad4-rewrite", .vector_size = sizeof (u32), .format_trace = format_srv6_ad_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SRV6_AD_REWRITE_N_COUNTERS, .error_strings = srv6_ad_rewrite_counter_strings, .n_next_nodes = SRV6_AD_REWRITE_N_NEXT, .next_nodes = { [SRV6_AD_REWRITE_NEXT_LOOKUP] = "ip6-lookup", [SRV6_AD_REWRITE_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /** * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword srv6_ad6_rewrite_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *srm = &sr_main; srv6_ad_main_t *sm = &srv6_ad_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 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); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0, *ip0_encap = 0; ip6_sr_localsid_t *ls0; srv6_ad_localsid_t *ls0_mem; u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; u16 new_l0 = 0; 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_encap = vlib_buffer_get_current (b0); ls0 = pool_elt_at_index (srm->localsids, sm->sw_iface_localsid6[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); ls0_mem = ls0->plugin_mem; if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) { next0 = SRV6_AD_REWRITE_NEXT_ERROR; b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; } else { ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= (ls0_mem->rw_len + b0->current_data)); clib_memcpy_fast (((u8 *) ip0_encap) - ls0_mem->rw_len, ls0_mem->rewrite, ls0_mem->rw_len); vlib_buffer_advance (b0, -(word) ls0_mem->rw_len); ip0 = vlib_buffer_get_current (b0); /* Update inner IPv6 hop limit */ ip0_encap->hop_limit -= 1; /* Update outer IPv6 length (in case it has changed) */ new_l0 = ls0_mem->rw_len + clib_net_to_host_u16 (ip0_encap->payload_length); ip0->payload_length = clib_host_to_net_u16 (new_l0); } if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { srv6_ad_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr); tr->error = 0; if (next0 == SRV6_AD_REWRITE_NEXT_ERROR) { tr->error = 1; } else { clib_memcpy_fast (tr->src.as_u8, ip0->src_address.as_u8, sizeof tr->src.as_u8); clib_memcpy_fast (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof tr->dst.as_u8); } } /* Increment per-SID AD rewrite counters */ vlib_increment_combined_counter (((next0 == SRV6_AD_LOCALSID_NEXT_ERROR) ? &(sm->invalid_counters) : &(sm->valid_counters)), vm->thread_index, ls0_mem->index, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); cnt_packets++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, srv6_ad6_rewrite_node.index, SRV6_AD_REWRITE_COUNTER_PROCESSED, cnt_packets); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (srv6_ad6_rewrite_node) = { .function = srv6_ad6_rewrite_fn, .name = "srv6-ad6-rewrite", .vector_size = sizeof (u32), .format_trace = format_srv6_ad_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SRV6_AD_REWRITE_N_COUNTERS, .error_strings = srv6_ad_rewrite_counter_strings, .n_next_nodes = SRV6_AD_REWRITE_N_NEXT, .next_nodes = { [SRV6_AD_REWRITE_NEXT_LOOKUP] = "ip6-lookup", [SRV6_AD_REWRITE_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */