csit - Integration tests

Age	Commit message (Expand)	Author	Files	Lines
2018-12-13	Trending: New sensitive detection	Vratko Polak	1	-0/+60

/* * decap.c: vxlan gbp tunnel decap packet processing * * Copyright (c) 2018 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/pg/pg.h> #include <vnet/vxlan-gbp/vxlan_gbp.h> vlib_node_registration_t vxlan4_gbp_input_node; vlib_node_registration_t vxlan6_gbp_input_node; typedef struct { u32 next_index; u32 tunnel_index; u32 error; u32 vni; u16 sclass; u8 flags; } vxlan_gbp_rx_trace_t; static u8 * format_vxlan_gbp_rx_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 *); vxlan_gbp_rx_trace_t *t = va_arg (*args, vxlan_gbp_rx_trace_t *); if (t->tunnel_index == ~0) return format (s, "VXLAN_GBP decap error - tunnel for vni %d does not exist", t->vni); return format (s, "VXLAN_GBP decap from vxlan_gbp_tunnel%d vni %d sclass %d" " flags %U next %d error %d", t->tunnel_index, t->vni, t->sclass, format_vxlan_gbp_header_gpflags, t->flags, t->next_index, t->error); } always_inline u32 buf_fib_index (vlib_buffer_t * b, u32 is_ip4) { u32 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX]; if (sw_if_index != (u32) ~ 0) return sw_if_index; u32 *fib_index_by_sw_if_index = is_ip4 ? ip4_main.fib_index_by_sw_if_index : ip6_main.fib_index_by_sw_if_index; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; return vec_elt (fib_index_by_sw_if_index, sw_if_index); } typedef vxlan4_gbp_tunnel_key_t last_tunnel_cache4; always_inline vxlan_gbp_tunnel_t * vxlan4_gbp_find_tunnel (vxlan_gbp_main_t * vxm, last_tunnel_cache4 * cache, u32 fib_index, ip4_header_t * ip4_0, vxlan_gbp_header_t * vxlan_gbp0) { /* * Check unicast first since that's where most of the traffic comes from * Make sure VXLAN_GBP tunnel exist according to packet SIP, DIP and VNI */ vxlan4_gbp_tunnel_key_t key4; int rv; key4.key[1] = ((u64) fib_index << 32) | vxlan_gbp0->vni_reserved; key4.key[0] = (((u64) ip4_0->dst_address.as_u32 << 32) | ip4_0->src_address.as_u32); if (PREDICT_FALSE (key4.key[0] != cache->key[0] || key4.key[1] != cache->key[1])) { rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_gbp_tunnel_by_key, &key4); if (PREDICT_FALSE (rv == 0)) { *cache = key4; return (pool_elt_at_index (vxm->tunnels, cache->value)); } } else { return (pool_elt_at_index (vxm->tunnels, cache->value)); } /* No unicast match - try multicast */ if (PREDICT_TRUE (!ip4_address_is_multicast (&ip4_0->dst_address))) return (NULL); key4.key[0] = ip4_0->dst_address.as_u32; /* Make sure mcast VXLAN_GBP tunnel exist by packet DIP and VNI */ rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_gbp_tunnel_by_key, &key4); if (PREDICT_FALSE (rv != 0)) return (NULL); return (pool_elt_at_index (vxm->tunnels, key4.value)); } typedef vxlan6_gbp_tunnel_key_t last_tunnel_cache6; always_inline vxlan_gbp_tunnel_t * vxlan6_gbp_find_tunnel (vxlan_gbp_main_t * vxm, last_tunnel_cache6 * cache, u32 fib_index, ip6_header_t * ip6_0, vxlan_gbp_header_t * vxlan_gbp0) { /* Make sure VXLAN_GBP tunnel exist according to packet SIP and VNI */ vxlan6_gbp_tunnel_key_t key6 = { .key = { [0] = ip6_0->src_address.as_u64[0], [1] = ip6_0->src_address.as_u64[1], [2] = (((u64) fib_index) << 32) | vxlan_gbp0->vni_reserved, } }; int rv; if (PREDICT_FALSE (clib_bihash_key_compare_24_8 (key6.key, cache->key) == 0)) { rv = clib_bihash_search_inline_24_8 (&vxm->vxlan6_gbp_tunnel_by_key, &key6); if (PREDICT_FALSE (rv != 0)) return NULL; *cache = key6; } vxlan_gbp_tunnel_t *t0 = pool_elt_at_index (vxm->tunnels, cache->value); /* Validate VXLAN_GBP tunnel SIP against packet DIP */ if (PREDICT_FALSE (!ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6))) { /* try multicast */ if (PREDICT_TRUE (!ip6_address_is_multicast (&ip6_0->dst_address))) return 0; /* Make sure mcast VXLAN_GBP tunnel exist by packet DIP and VNI */ key6.key[0] = ip6_0->dst_address.as_u64[0]; key6.key[1] = ip6_0->dst_address.as_u64[1]; rv = clib_bihash_search_inline_24_8 (&vxm->vxlan6_gbp_tunnel_by_key, &key6); if (PREDICT_FALSE (rv != 0)) return 0; } return t0; } always_inline vxlan_gbp_input_next_t vxlan_gbp_tunnel_get_next (const vxlan_gbp_tunnel_t * t, vlib_buffer_t * b0) { if (VXLAN_GBP_TUNNEL_MODE_L2 == t->mode) return (VXLAN_GBP_INPUT_NEXT_L2_INPUT); else { ethernet_header_t *e0; u16 type0; e0 = vlib_buffer_get_current (b0); vlib_buffer_advance (b0, sizeof (*e0)); type0 = clib_net_to_host_u16 (e0->type); switch (type0) { case ETHERNET_TYPE_IP4: return (VXLAN_GBP_INPUT_NEXT_IP4_INPUT); case ETHERNET_TYPE_IP6: return (VXLAN_GBP_INPUT_NEXT_IP6_INPUT); } } return (VXLAN_GBP_INPUT_NEXT_DROP); } always_inline uword vxlan_gbp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u8 is_ip4) { vxlan_gbp_main_t *vxm = &vxlan_gbp_main; vnet_main_t *vnm = vxm->vnet_main; vnet_interface_main_t *im = &vnm->interface_main; vlib_combined_counter_main_t *rx_counter = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX; vlib_combined_counter_main_t *drop_counter = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP; last_tunnel_cache4 last4; last_tunnel_cache6 last6; u32 pkts_decapsulated = 0; u32 thread_index = vlib_get_thread_index (); if (is_ip4) clib_memset (&last4, 0xff, sizeof last4); else clib_memset (&last6, 0xff, sizeof last6); u32 next_index = node->cached_next_index; u32 *from = vlib_frame_vector_args (from_frame); u32 n_left_from = from_frame->n_vectors; while (n_left_from > 0) { u32 *to_next, n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { /* Prefetch next iteration. */ { vlib_buffer_t *p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); vlib_prefetch_buffer_header (p2, LOAD); vlib_prefetch_buffer_header (p3, LOAD); CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); } u32 bi0 = to_next[0] = from[0]; u32 bi1 = to_next[1] = from[1]; from += 2; to_next += 2; n_left_to_next -= 2; n_left_from -= 2; vlib_buffer_t *b0, *b1; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); /* udp leaves current_data pointing at the vxlan_gbp header */ void *cur0 = vlib_buffer_get_current (b0); void *cur1 = vlib_buffer_get_current (b1); vxlan_gbp_header_t *vxlan_gbp0 = cur0; vxlan_gbp_header_t *vxlan_gbp1 = cur1; ip4_header_t *ip4_0, *ip4_1; ip6_header_t *ip6_0, *ip6_1; if (is_ip4) { ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t); ip4_1 = cur1 - sizeof (udp_header_t) - sizeof (ip4_header_t); } else { ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t); ip6_1 = cur1 - sizeof (udp_header_t) - sizeof (ip6_header_t); } u32 fi0 = buf_fib_index (b0, is_ip4); u32 fi1 = buf_fib_index (b1, is_ip4); vxlan_gbp_tunnel_t *t0, *t1; if (is_ip4) { t0 = vxlan4_gbp_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan_gbp0); t1 = vxlan4_gbp_find_tunnel (vxm, &last4, fi1, ip4_1, vxlan_gbp1); } else { t0 = vxlan6_gbp_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan_gbp0); t1 = vxlan6_gbp_find_tunnel (vxm, &last6, fi1, ip6_1, vxlan_gbp1); } u32 len0 = vlib_buffer_length_in_chain (vm, b0); u32 len1 = vlib_buffer_length_in_chain (vm, b1); vxlan_gbp_input_next_t next0, next1; u8 error0 = 0, error1 = 0; u8 flags0 = vxlan_gbp_get_flags (vxlan_gbp0); u8 flags1 = vxlan_gbp_get_flags (vxlan_gbp1); /* Required to make the l2 tag push / pop code work on l2 subifs */ /* pop vxlan_gbp */ vlib_buffer_advance (b0, sizeof *vxlan_gbp0); vlib_buffer_advance (b1, sizeof *vxlan_gbp1); /* Validate VXLAN_GBP tunnel encap-fib index against packet */ if (PREDICT_FALSE (t0 == NULL || flags0 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G))) { if (t0 != NULL && flags0 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G)) { error0 = VXLAN_GBP_ERROR_BAD_FLAGS; vlib_increment_combined_counter (drop_counter, thread_index, t0->sw_if_index, 1, len0); next0 = VXLAN_GBP_INPUT_NEXT_DROP; } else { error0 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL; next0 = VXLAN_GBP_INPUT_NEXT_NO_TUNNEL; } b0->error = node->errors[error0]; } else { next0 = vxlan_gbp_tunnel_get_next (t0, b0); /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */ vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index; vlib_increment_combined_counter (rx_counter, thread_index, t0->sw_if_index, 1, len0); pkts_decapsulated++; } vnet_buffer2 (b0)->gbp.flags = vxlan_gbp_get_gpflags (vxlan_gbp0); vnet_buffer2 (b0)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp0); if (PREDICT_FALSE (t1 == 0 || flags1 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G))) { if (t1 != 0 && flags1 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G)) { error1 = VXLAN_GBP_ERROR_BAD_FLAGS; vlib_increment_combined_counter (drop_counter, thread_index, t1->sw_if_index, 1, len1); next1 = VXLAN_GBP_INPUT_NEXT_DROP; } else { error1 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL; next1 = VXLAN_GBP_INPUT_NEXT_NO_TUNNEL; } b1->error = node->errors[error1]; } else { next1 = vxlan_gbp_tunnel_get_next (t1, b1); /* Set packet input sw_if_index to unicast VXLAN_GBP tunnel for learning */ vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index; pkts_decapsulated++; vlib_increment_combined_counter (rx_counter, thread_index, t1->sw_if_index, 1, len1); } vnet_buffer2 (b1)->gbp.flags = vxlan_gbp_get_gpflags (vxlan_gbp1); vnet_buffer2 (b1)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp1); vnet_update_l2_len (b0); vnet_update_l2_len (b1); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gbp_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->next_index = next0; tr->error = error0; tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels; tr->vni = vxlan_gbp_get_vni (vxlan_gbp0); tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp0); tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp0); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gbp_rx_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); tr->next_index = next1; tr->error = error1; tr->tunnel_index = t1 == 0 ? ~0 : t1 - vxm->tunnels; tr->vni = vxlan_gbp_get_vni (vxlan_gbp1); tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp1); tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp1); } vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0 = to_next[0] = from[0]; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); /* udp leaves current_data pointing at the vxlan_gbp header */ void *cur0 = vlib_buffer_get_current (b0); vxlan_gbp_header_t *vxlan_gbp0 = cur0; ip4_header_t *ip4_0; ip6_header_t *ip6_0; if (is_ip4) ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t); else ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t); u32 fi0 = buf_fib_index (b0, is_ip4); vxlan_gbp_tunnel_t *t0; if (is_ip4) t0 = vxlan4_gbp_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan_gbp0); else t0 = vxlan6_gbp_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan_gbp0); uword len0 = vlib_buffer_length_in_chain (vm, b0); vxlan_gbp_input_next_t next0; u8 error0 = 0; u8 flags0 = vxlan_gbp_get_flags (vxlan_gbp0); /* pop (ip, udp, vxlan_gbp) */ vlib_buffer_advance (b0, sizeof (*vxlan_gbp0)); /* Validate VXLAN_GBP tunnel encap-fib index against packet */ if (PREDICT_FALSE (t0 == NULL || flags0 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G))) { if (t0 != NULL && flags0 != (VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G)) { error0 = VXLAN_GBP_ERROR_BAD_FLAGS; vlib_increment_combined_counter (drop_counter, thread_index, t0->sw_if_index, 1, len0); next0 = VXLAN_GBP_INPUT_NEXT_DROP; } else { error0 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL; next0 = VXLAN_GBP_INPUT_NEXT_NO_TUNNEL; } b0->error = node->errors[error0]; } else { next0 = vxlan_gbp_tunnel_get_next (t0, b0); /* Set packet input sw_if_index to unicast VXLAN_GBP tunnel for learning */ vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index; pkts_decapsulated++; vlib_increment_combined_counter (rx_counter, thread_index, t0->sw_if_index, 1, len0); } vnet_buffer2 (b0)->gbp.flags = vxlan_gbp_get_gpflags (vxlan_gbp0); vnet_buffer2 (b0)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp0); /* Required to make the l2 tag push / pop code work on l2 subifs */ vnet_update_l2_len (b0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gbp_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->next_index = next0; tr->error = error0; tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels; tr->vni = vxlan_gbp_get_vni (vxlan_gbp0); tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp0); tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp0); } 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); } /* Do we still need this now that tunnel tx stats is kept? */ u32 node_idx = is_ip4 ? vxlan4_gbp_input_node.index : vxlan6_gbp_input_node.index; vlib_node_increment_counter (vm, node_idx, VXLAN_GBP_ERROR_DECAPSULATED, pkts_decapsulated); return from_frame->n_vectors; } static uword vxlan4_gbp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return vxlan_gbp_input (vm, node, from_frame, /* is_ip4 */ 1); } static uword vxlan6_gbp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return vxlan_gbp_input (vm, node, from_frame, /* is_ip4 */ 0); } static char *vxlan_gbp_error_strings[] = { #define vxlan_gbp_error(n,s) s, #include <vnet/vxlan-gbp/vxlan_gbp_error.def> #undef vxlan_gbp_error #undef _ }; /* *INDENT-OFF* */ VLIB_REGISTER_NODE (vxlan4_gbp_input_node) = { .function = vxlan4_gbp_input, .name = "vxlan4-gbp-input", .vector_size = sizeof (u32), .n_errors = VXLAN_GBP_N_ERROR, .error_strings = vxlan_gbp_error_strings, .n_next_nodes = VXLAN_GBP_INPUT_N_NEXT, .format_trace = format_vxlan_gbp_rx_trace, .next_nodes = { #define _(s,n) [VXLAN_GBP_INPUT_NEXT_##s] = n, foreach_vxlan_gbp_input_next #undef _ }, }; VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gbp_input_node, vxlan4_gbp_input) VLIB_REGISTER_NODE (vxlan6_gbp_input_node) = { .function = vxlan6_gbp_input, .name = "vxlan6-gbp-input", .vector_size = sizeof (u32), .n_errors = VXLAN_GBP_N_ERROR, .error_strings = vxlan_gbp_error_strings, .n_next_nodes = VXLAN_GBP_INPUT_N_NEXT, .next_nodes = { #define _(s,n) [VXLAN_GBP_INPUT_NEXT_##s] = n, foreach_vxlan_gbp_input_next #undef _ }, .format_trace = format_vxlan_gbp_rx_trace, }; VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gbp_input_node, vxlan6_gbp_input) /* *INDENT-ON* */ typedef enum { IP_VXLAN_GBP_BYPASS_NEXT_DROP, IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP, IP_VXLAN_GBP_BYPASS_N_NEXT, } ip_vxan_gbp_bypass_next_t; always_inline uword ip_vxlan_gbp_bypass_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u32 is_ip4) { vxlan_gbp_main_t *vxm = &vxlan_gbp_main; u32 *from, *to_next, n_left_from, n_left_to_next, next_index; vlib_node_runtime_t *error_node = vlib_node_get_runtime (vm, ip4_input_node.index); ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */ ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */ from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; if (node->flags & VLIB_NODE_FLAG_TRACE) ip4_forward_next_trace (vm, node, frame, VLIB_TX); if (is_ip4) addr4.data_u32 = ~0; else ip6_address_set_zero (&addr6); while (n_left_from > 0) { vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { vlib_buffer_t *b0, *b1; ip4_header_t *ip40, *ip41; ip6_header_t *ip60, *ip61; udp_header_t *udp0, *udp1; u32 bi0, ip_len0, udp_len0, flags0, next0; u32 bi1, ip_len1, udp_len1, flags1, next1; i32 len_diff0, len_diff1; u8 error0, good_udp0, proto0; u8 error1, good_udp1, proto1; /* Prefetch next iteration. */ { vlib_buffer_t *p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); vlib_prefetch_buffer_header (p2, LOAD); vlib_prefetch_buffer_header (p3, LOAD); CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); } bi0 = to_next[0] = from[0]; bi1 = to_next[1] = from[1]; from += 2; n_left_from -= 2; to_next += 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); if (is_ip4) { ip40 = vlib_buffer_get_current (b0); ip41 = vlib_buffer_get_current (b1); } else { ip60 = vlib_buffer_get_current (b0); ip61 = vlib_buffer_get_current (b1); } /* Setup packet for next IP feature */ vnet_feature_next (&next0, b0); vnet_feature_next (&next1, b1); if (is_ip4) { /* Treat IP frag packets as "experimental" protocol for now until support of IP frag reassembly is implemented */ proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; proto1 = ip4_is_fragment (ip41) ? 0xfe : ip41->protocol; } else { proto0 = ip60->protocol; proto1 = ip61->protocol; } /* Process packet 0 */ if (proto0 != IP_PROTOCOL_UDP) goto exit0; /* not UDP packet */ if (is_ip4) udp0 = ip4_next_header (ip40); else udp0 = ip6_next_header (ip60); if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp)) goto exit0; /* not VXLAN_GBP packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (addr4.as_u32 != ip40->dst_address.as_u32) { if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32)) goto exit0; /* no local VTEP for VXLAN_GBP packet */ addr4 = ip40->dst_address; } } else { if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) { if (!hash_get_mem (vxm->vtep6, &ip60->dst_address)) goto exit0; /* no local VTEP for VXLAN_GBP packet */ addr6 = ip60->dst_address; } } flags0 = b0->flags; good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; /* Don't verify UDP checksum for packets with explicit zero checksum. */ good_udp0 |= udp0->checksum == 0; /* Verify UDP length */ if (is_ip4) ip_len0 = clib_net_to_host_u16 (ip40->length); else ip_len0 = clib_net_to_host_u16 (ip60->payload_length); udp_len0 = clib_net_to_host_u16 (udp0->length); len_diff0 = ip_len0 - udp_len0; /* Verify UDP checksum */ if (PREDICT_FALSE (!good_udp0)) { if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) { if (is_ip4) flags0 = ip4_tcp_udp_validate_checksum (vm, b0); else flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; } } if (is_ip4) { error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; } else { error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; } next0 = error0 ? IP_VXLAN_GBP_BYPASS_NEXT_DROP : IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP; b0->error = error0 ? error_node->errors[error0] : 0; /* vxlan-gbp-input node expect current at VXLAN_GBP header */ if (is_ip4) vlib_buffer_advance (b0, sizeof (ip4_header_t) + sizeof (udp_header_t)); else vlib_buffer_advance (b0, sizeof (ip6_header_t) + sizeof (udp_header_t)); exit0: /* Process packet 1 */ if (proto1 != IP_PROTOCOL_UDP) goto exit1; /* not UDP packet */ if (is_ip4) udp1 = ip4_next_header (ip41); else udp1 = ip6_next_header (ip61); if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp)) goto exit1; /* not VXLAN_GBP packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (addr4.as_u32 != ip41->dst_address.as_u32) { if (!hash_get (vxm->vtep4, ip41->dst_address.as_u32)) goto exit1; /* no local VTEP for VXLAN_GBP packet */ addr4 = ip41->dst_address; } } else { if (!ip6_address_is_equal (&addr6, &ip61->dst_address)) { if (!hash_get_mem (vxm->vtep6, &ip61->dst_address)) goto exit1; /* no local VTEP for VXLAN_GBP packet */ addr6 = ip61->dst_address; } } flags1 = b1->flags; good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; /* Don't verify UDP checksum for packets with explicit zero checksum. */ good_udp1 |= udp1->checksum == 0; /* Verify UDP length */ if (is_ip4) ip_len1 = clib_net_to_host_u16 (ip41->length); else ip_len1 = clib_net_to_host_u16 (ip61->payload_length); udp_len1 = clib_net_to_host_u16 (udp1->length); len_diff1 = ip_len1 - udp_len1; /* Verify UDP checksum */ if (PREDICT_FALSE (!good_udp1)) { if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) { if (is_ip4) flags1 = ip4_tcp_udp_validate_checksum (vm, b1); else flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1); good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; } } if (is_ip4) { error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM; error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH; } else { error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM; error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH; } next1 = error1 ? IP_VXLAN_GBP_BYPASS_NEXT_DROP : IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP; b1->error = error1 ? error_node->errors[error1] : 0; /* vxlan_gbp-input node expect current at VXLAN_GBP header */ if (is_ip4) vlib_buffer_advance (b1, sizeof (ip4_header_t) + sizeof (udp_header_t)); else vlib_buffer_advance (b1, sizeof (ip6_header_t) + sizeof (udp_header_t)); exit1: vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { vlib_buffer_t *b0; ip4_header_t *ip40; ip6_header_t *ip60; udp_header_t *udp0; u32 bi0, ip_len0, udp_len0, flags0, next0; i32 len_diff0; u8 error0, good_udp0, proto0; bi0 = to_next[0] = from[0]; from += 1; n_left_from -= 1; to_next += 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); if (is_ip4) ip40 = vlib_buffer_get_current (b0); else ip60 = vlib_buffer_get_current (b0); /* Setup packet for next IP feature */ vnet_feature_next (&next0, b0); if (is_ip4) /* Treat IP4 frag packets as "experimental" protocol for now until support of IP frag reassembly is implemented */ proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol; else proto0 = ip60->protocol; if (proto0 != IP_PROTOCOL_UDP) goto exit; /* not UDP packet */ if (is_ip4) udp0 = ip4_next_header (ip40); else udp0 = ip6_next_header (ip60); if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp)) goto exit; /* not VXLAN_GBP packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (addr4.as_u32 != ip40->dst_address.as_u32) { if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32)) goto exit; /* no local VTEP for VXLAN_GBP packet */ addr4 = ip40->dst_address; } } else { if (!ip6_address_is_equal (&addr6, &ip60->dst_address)) { if (!hash_get_mem (vxm->vtep6, &ip60->dst_address)) goto exit; /* no local VTEP for VXLAN_GBP packet */ addr6 = ip60->dst_address; } } flags0 = b0->flags; good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; /* Don't verify UDP checksum for packets with explicit zero checksum. */ good_udp0 |= udp0->checksum == 0; /* Verify UDP length */ if (is_ip4) ip_len0 = clib_net_to_host_u16 (ip40->length); else ip_len0 = clib_net_to_host_u16 (ip60->payload_length); udp_len0 = clib_net_to_host_u16 (udp0->length); len_diff0 = ip_len0 - udp_len0; /* Verify UDP checksum */ if (PREDICT_FALSE (!good_udp0)) { if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0) { if (is_ip4) flags0 = ip4_tcp_udp_validate_checksum (vm, b0); else flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0); good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0; } } if (is_ip4) { error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; } else { error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM; error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH; } next0 = error0 ? IP_VXLAN_GBP_BYPASS_NEXT_DROP : IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP; b0->error = error0 ? error_node->errors[error0] : 0; /* vxlan_gbp-input node expect current at VXLAN_GBP header */ if (is_ip4) vlib_buffer_advance (b0, sizeof (ip4_header_t) + sizeof (udp_header_t)); else vlib_buffer_advance (b0, sizeof (ip6_header_t) + sizeof (udp_header_t)); exit: 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); } return frame->n_vectors; } static uword ip4_vxlan_gbp_bypass (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return ip_vxlan_gbp_bypass_inline (vm, node, frame, /* is_ip4 */ 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip4_vxlan_gbp_bypass_node) = { .function = ip4_vxlan_gbp_bypass, .name = "ip4-vxlan-gbp-bypass", .vector_size = sizeof (u32), .n_next_nodes = IP_VXLAN_GBP_BYPASS_N_NEXT, .next_nodes = { [IP_VXLAN_GBP_BYPASS_NEXT_DROP] = "error-drop", [IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP] = "vxlan4-gbp-input", }, .format_buffer = format_ip4_header, .format_trace = format_ip4_forward_next_trace, }; VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gbp_bypass_node, ip4_vxlan_gbp_bypass) /* *INDENT-ON* */ /* Dummy init function to get us linked in. */ clib_error_t * ip4_vxlan_gbp_bypass_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (ip4_vxlan_gbp_bypass_init); static uword ip6_vxlan_gbp_bypass (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return ip_vxlan_gbp_bypass_inline (vm, node, frame, /* is_ip4 */ 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip6_vxlan_gbp_bypass_node) = { .function = ip6_vxlan_gbp_bypass, .name = "ip6-vxlan-gbp-bypass", .vector_size = sizeof (u32), .n_next_nodes = IP_VXLAN_GBP_BYPASS_N_NEXT, .next_nodes = { [IP_VXLAN_GBP_BYPASS_NEXT_DROP] = "error-drop", [IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP] = "vxlan6-gbp-input", }, .format_buffer = format_ip6_header, .format_trace = format_ip6_forward_next_trace, }; VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gbp_bypass_node, ip6_vxlan_gbp_bypass) /* *INDENT-ON* */ /* Dummy init function to get us linked in. */ clib_error_t * ip6_vxlan_gbp_bypass_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (ip6_vxlan_gbp_bypass_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */