/* * Copyright (c) 2017 SUSE LLC. * 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 #include #include typedef struct { u32 next_index; u32 tunnel_index; u32 error; u32 vni_rsvd; } geneve_rx_trace_t; static u8 * format_geneve_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 *); geneve_rx_trace_t *t = va_arg (*args, geneve_rx_trace_t *); if (t->tunnel_index != ~0) { s = format (s, "GENEVE decap from geneve_tunnel%d vni %d next %d error %d", t->tunnel_index, t->vni_rsvd, t->next_index, t->error); } else { s = format (s, "GENEVE decap error - tunnel for vni %d does not exist", t->vni_rsvd); } return s; } always_inline u32 validate_geneve_fib (vlib_buffer_t * b, geneve_tunnel_t * t, u32 is_ip4) { u32 fib_index, sw_if_index; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; if (is_ip4) fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) : vnet_buffer (b)->sw_if_index[VLIB_TX]; else fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) : vnet_buffer (b)->sw_if_index[VLIB_TX]; return (fib_index == t->encap_fib_index); } always_inline uword geneve_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u32 is_ip4) { u32 n_left_from, next_index, *from, *to_next; geneve_main_t *vxm = &geneve_main; vnet_main_t *vnm = vxm->vnet_main; vnet_interface_main_t *im = &vnm->interface_main; u32 last_tunnel_index = ~0; geneve4_tunnel_key_t last_key4; geneve6_tunnel_key_t last_key6; u32 pkts_decapsulated = 0; u32 thread_index = vm->thread_index; u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; if (is_ip4) last_key4.as_u64 = ~0; else clib_memset (&last_key6, 0xff, sizeof (last_key6)); from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); next_index = node->cached_next_index; stats_sw_if_index = node->runtime_data[0]; stats_n_packets = stats_n_bytes = 0; 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 >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u32 next0, next1; ip4_header_t *ip4_0, *ip4_1; ip6_header_t *ip6_0, *ip6_1; geneve_header_t *geneve0, *geneve1; uword *p0, *p1; u32 tunnel_index0, tunnel_index1; geneve_tunnel_t *t0, *t1, *mt0 = NULL, *mt1 = NULL; geneve4_tunnel_key_t key4_0, key4_1; geneve6_tunnel_key_t key6_0, key6_1; u32 error0, error1; u32 sw_if_index0, sw_if_index1, len0, len1; /* Prefetch next iteration. */ { vlib_prefetch_buffer_header (b[2], LOAD); vlib_prefetch_buffer_header (b[3], LOAD); CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); } bi0 = from[0]; bi1 = from[1]; to_next[0] = bi0; to_next[1] = bi1; from += 2; to_next += 2; n_left_to_next -= 2; n_left_from -= 2; b0 = b[0]; b1 = b[1]; b += 2; /* udp leaves current_data pointing at the geneve header */ geneve0 = vlib_buffer_get_current (b0); geneve1 = vlib_buffer_get_current (b1); vnet_geneve_hdr_1word_ntoh (geneve0); vnet_geneve_hdr_1word_ntoh (geneve1); if (is_ip4) { vlib_buffer_advance (b0, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t))); vlib_buffer_advance (b1, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t))); ip4_0 = vlib_buffer_get_current (b0); ip4_1 = vlib_buffer_get_current (b1); } else { vlib_buffer_advance (b0, -(word) (sizeof (udp_header_t) + sizeof (ip6_header_t))); vlib_buffer_advance (b1, -(word) (sizeof (udp_header_t) + sizeof (ip6_header_t))); ip6_0 = vlib_buffer_get_current (b0); ip6_1 = vlib_buffer_get_current (b1); } /* pop (ip, udp, geneve) */ if (is_ip4) { vlib_buffer_advance (b0, sizeof (*ip4_0) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH + vnet_get_geneve_options_len (geneve0)); vlib_buffer_advance (b1, sizeof (*ip4_1) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH + vnet_get_geneve_options_len (geneve1)); } else { vlib_buffer_advance (b0, sizeof (*ip6_0) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH + vnet_get_geneve_options_len (geneve0)); vlib_buffer_advance (b1, sizeof (*ip6_1) + sizeof (udp_header_t) + GENEVE_BASE_HEADER_LENGTH + vnet_get_geneve_options_len (geneve1)); } tunnel_index0 = ~0; error0 = 0; tunnel_index1 = ~0; error1 = 0; if (PREDICT_FALSE (vnet_get_geneve_version (geneve0) != GENEVE_VERSION)) { 
/*
 * 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 LLDP external definition
 */
#ifndef __included_lldp_h__
#define __included_lldp_h__

typedef enum lldp_cfg_err
{
  lldp_ok,
  lldp_not_supported,
  lldp_invalid_arg,
} lldp_cfg_err_t;

lldp_cfg_err_t lldp_cfg_intf_set (u32 hw_if_index, u8 ** port_desc,
                u8 **mgmt_ip4, u8 **mgmt_ip6, u8 **mgmt_oid, int enable);
lldp_cfg_err_t lldp_cfg_set (u8 ** host, int hold_time, int tx_interval);


#endif /* __included_lldp_h__ */
FLAGS; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } #endif if (is_ip4) { key4_0.remote = ip4_0->src_address.as_u32; key4_0.vni = vnet_get_geneve_vni_bigendian (geneve0); /* Make sure unicast GENEVE tunnel exist by packet SIP and VNI */ if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64)) { p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); if (PREDICT_FALSE (p0 == NULL)) { error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } last_key4.as_u64 = key4_0.as_u64; tunnel_index0 = last_tunnel_index = p0[0]; } else tunnel_index0 = last_tunnel_index; t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); /* Validate GENEVE tunnel encap-fib index agaist packet */ if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) { error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } /* Validate GENEVE tunnel SIP against packet DIP */ if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->local.ip4.as_u32)) goto next00; /* valid packet */ if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address))) { key4_0.remote = ip4_0->dst_address.as_u32; key4_0.vni = vnet_get_geneve_vni_bigendian (geneve0); /* Make sure mcast GENEVE tunnel exist by packet DIP and VNI */ p0 = hash_get (vxm->geneve4_tunnel_by_key, key4_0.as_u64); if (PREDICT_TRUE (p0 != NULL)) { mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); goto next00; /* valid packet */ } } error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } else /* !is_ip4 */ { key6_0.remote.as_u64[0] = ip6_0->src_address.as_u64[0]; key6_0.remote.as_u64[1] = ip6_0->src_address.as_u64[1]; key6_0.vni = vnet_get_geneve_vni_bigendian (geneve0); /* Make sure GENEVE tunnel exist according to packet SIP and VNI */ if (PREDICT_FALSE (memcmp (&key6_0, &last_key6, sizeof (last_key6)) != 0)) { p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); if (PREDICT_FALSE (p0 == NULL)) { error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } clib_memcpy_fast (&last_key6, &key6_0, sizeof (key6_0)); tunnel_index0 = last_tunnel_index = p0[0]; } else tunnel_index0 = last_tunnel_index; t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0); /* Validate GENEVE tunnel encap-fib index agaist packet */ if (PREDICT_FALSE (validate_geneve_fib (b0, t0, is_ip4) == 0)) { error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } /* Validate GENEVE tunnel SIP against packet DIP */ if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, &t0->local.ip6))) goto next00; /* valid packet */ if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address))) { key6_0.remote.as_u64[0] = ip6_0->dst_address.as_u64[0]; key6_0.remote.as_u64[1] = ip6_0->dst_address.as_u64[1]; key6_0.vni = vnet_get_geneve_vni_bigendian (geneve0); p0 = hash_get_mem (vxm->geneve6_tunnel_by_key, &key6_0); if (PREDICT_TRUE (p0 != NULL)) { mt0 = pool_elt_at_index (vxm->tunnels, p0[0]); goto next00; /* valid packet */ } } error0 = GENEVE_ERROR_NO_SUCH_TUNNEL; next0 = GENEVE_INPUT_NEXT_DROP; goto trace00; } next00: next0 = t0->decap_next_index; sw_if_index0 = t0->sw_if_index; len0 = vlib_buffer_length_in_chain (vm, b0); /* Required to make the l2 tag push / pop code work on l2 subifs */ if (PREDICT_TRUE (next0 == GENEVE_INPUT_NEXT_L2_INPUT)) vnet_update_l2_len (b0); /* Set packet input sw_if_index to unicast GENEVE tunnel for learning */ vnet_buffer (b0)->sw_if_index[VLIB_RX] = sw_if_index0; sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0; pkts_decapsulated++; stats_n_packets += 1; stats_n_bytes += len0; /* Batch stats increment on the same geneve tunnel so counter is not incremented per packet */ if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index)) { stats_n_packets -= 1; stats_n_bytes -= len0; if (stats_n_packets) vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); stats_n_packets = 1; stats_n_bytes = len0; stats_sw_if_index = sw_if_index0; } trace00: b0->error = error0 ? node->errors[error0] : 0; if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { geneve_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); tr->next_index = next0; tr->error = error0; tr->tunnel_index = tunnel_index0; tr->vni_rsvd = vnet_get_geneve_vni (geneve0); } 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? */ vlib_node_increment_counter (vm, is_ip4 ? geneve4_input_node. index : geneve6_input_node.index, GENEVE_ERROR_DECAPSULATED, pkts_decapsulated); /* Increment any remaining batch stats */ if (stats_n_packets) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes); node->runtime_data[0] = stats_sw_if_index; } return from_frame->n_vectors; } VLIB_NODE_FN (geneve4_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return geneve_input (vm, node, from_frame, /* is_ip4 */ 1); } VLIB_NODE_FN (geneve6_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return geneve_input (vm, node, from_frame, /* is_ip4 */ 0); } static char *geneve_error_strings[] = { #define geneve_error(n,s) s, #include #undef geneve_error #undef _ }; /* *INDENT-OFF* */ VLIB_REGISTER_NODE (geneve4_input_node) = { .name = "geneve4-input", /* Takes a vector of packets. */ .vector_size = sizeof (u32), .n_errors = GENEVE_N_ERROR, .error_strings = geneve_error_strings, .n_next_nodes = GENEVE_INPUT_N_NEXT, .next_nodes = { #define _(s,n) [GENEVE_INPUT_NEXT_##s] = n, foreach_geneve_input_next #undef _ }, //temp .format_buffer = format_geneve_header, .format_trace = format_geneve_rx_trace, // $$$$ .unformat_buffer = unformat_geneve_header, }; VLIB_REGISTER_NODE (geneve6_input_node) = { .name = "geneve6-input", /* Takes a vector of packets. */ .vector_size = sizeof (u32), .n_errors = GENEVE_N_ERROR, .error_strings = geneve_error_strings, .n_next_nodes = GENEVE_INPUT_N_NEXT, .next_nodes = { #define _(s,n) [GENEVE_INPUT_NEXT_##s] = n, foreach_geneve_input_next #undef _ }, //temp .format_buffer = format_geneve_header, .format_trace = format_geneve_rx_trace, // $$$$ .unformat_buffer = unformat_geneve_header, }; /* *INDENT-ON* */ typedef enum { IP_GENEVE_BYPASS_NEXT_DROP, IP_GENEVE_BYPASS_NEXT_GENEVE, IP_GENEVE_BYPASS_N_NEXT, } ip_vxan_bypass_next_t; always_inline uword ip_geneve_bypass_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u32 is_ip4) { geneve_main_t *vxm = &geneve_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); vtep4_key_t last_vtep4; /* last IPv4 address / fib index matching a local VTEP address */ vtep6_key_t last_vtep6; /* last IPv6 address / fib index 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) vtep4_key_init (&last_vtep4); else vtep6_key_init (&last_vtep6); 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_geneve)) goto exit0; /* not GENEVE packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) goto exit0; /* no local VTEP for GENEVE packet */ } else { if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) goto exit0; /* no local VTEP for GENEVE packet */ } 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_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; b0->error = error0 ? error_node->errors[error0] : 0; /* geneve-input node expect current at GENEVE 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_geneve)) goto exit1; /* not GENEVE packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (!vtep4_check (&vxm->vtep_table, b1, ip41, &last_vtep4)) goto exit1; /* no local VTEP for GENEVE packet */ } else { if (!vtep6_check (&vxm->vtep_table, b1, ip61, &last_vtep6)) goto exit1; /* no local VTEP for GENEVE packet */ } 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_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; b1->error = error1 ? error_node->errors[error1] : 0; /* geneve-input node expect current at GENEVE 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_geneve)) goto exit; /* not GENEVE packet */ /* Validate DIP against VTEPs */ if (is_ip4) { if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4)) goto exit; /* no local VTEP for GENEVE packet */ } else { if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6)) goto exit; /* no local VTEP for GENEVE packet */ } 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_GENEVE_BYPASS_NEXT_DROP : IP_GENEVE_BYPASS_NEXT_GENEVE; b0->error = error0 ? error_node->errors[error0] : 0; /* geneve-input node expect current at GENEVE 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; } VLIB_NODE_FN (ip4_geneve_bypass_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return ip_geneve_bypass_inline (vm, node, frame, /* is_ip4 */ 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip4_geneve_bypass_node) = { .name = "ip4-geneve-bypass",.vector_size = sizeof (u32),.n_next_nodes = IP_GENEVE_BYPASS_N_NEXT,.next_nodes = { [IP_GENEVE_BYPASS_NEXT_DROP] = "error-drop", [IP_GENEVE_BYPASS_NEXT_GENEVE] = "geneve4-input",} ,.format_buffer = format_ip4_header,.format_trace = format_ip4_forward_next_trace,}; #ifndef CLIB_MARCH_VARIANT /* Dummy init function to get us linked in. */ clib_error_t *ip4_geneve_bypass_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (ip4_geneve_bypass_init); /* *INDENT-ON* */ #endif /* CLIB_MARCH_VARIANT */ VLIB_NODE_FN (ip6_geneve_bypass_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return ip_geneve_bypass_inline (vm, node, frame, /* is_ip4 */ 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (ip6_geneve_bypass_node) = { .name = "ip6-geneve-bypass",.vector_size = sizeof (u32),.n_next_nodes = IP_GENEVE_BYPASS_N_NEXT,.next_nodes = { [IP_GENEVE_BYPASS_NEXT_DROP] = "error-drop", [IP_GENEVE_BYPASS_NEXT_GENEVE] = "geneve6-input",} ,.format_buffer = format_ip6_header,.format_trace = format_ip6_forward_next_trace,}; /* *INDENT-ON* */ #ifndef CLIB_MARCH_VARIANT /* Dummy init function to get us linked in. */ clib_error_t * ip6_geneve_bypass_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (ip6_geneve_bypass_init); #endif /* CLIB_MARCH_VARIANT */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */