vpp - Vector Packet Processing

diff options

Diffstat (limited to 'src/vnet/gre/gre.c')

-rw-r--r--

1 files changed, 17 insertions, 8 deletions

/* * gre.c: gre * * Copyright (c) 2012 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 <vnet/vnet.h> #include <vnet/gre/gre.h> #include <vnet/adj/adj_midchain.h> #include <vnet/tunnel/tunnel_dp.h> extern gre_main_t gre_main; #ifndef CLIB_MARCH_VARIANT gre_main_t gre_main; typedef struct { union { ip4_and_gre_header_t ip4_and_gre; u64 as_u64[3]; }; } ip4_and_gre_union_t; typedef struct { union { ip6_and_gre_header_t ip6_and_gre; u64 as_u64[3]; }; } ip6_and_gre_union_t; #endif /* CLIB_MARCH_VARIANT */ /* Packet trace structure */ typedef struct { /* Tunnel-id / index in tunnel vector */ u32 tunnel_id; /* pkt length */ u32 length; /* tunnel ip addresses */ ip46_address_t src; ip46_address_t dst; } gre_tx_trace_t; extern u8 *format_gre_tx_trace (u8 * s, va_list * args); #ifndef CLIB_MARCH_VARIANT u8 * format_gre_tx_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 *); gre_tx_trace_t *t = va_arg (*args, gre_tx_trace_t *); s = format (s, "GRE: tunnel %d len %d src %U dst %U", t->tunnel_id, t->length, format_ip46_address, &t->src, IP46_TYPE_ANY, format_ip46_address, &t->dst, IP46_TYPE_ANY); return s; } u8 * format_gre_protocol (u8 * s, va_list * args) { gre_protocol_t p = va_arg (*args, u32); gre_main_t *gm = &gre_main; gre_protocol_info_t *pi = gre_get_protocol_info (gm, p); if (pi) s = format (s, "%s", pi->name); else s = format (s, "0x%04x", p); return s; } u8 * format_gre_header_with_length (u8 * s, va_list * args) { gre_main_t *gm = &gre_main; gre_header_t *h = va_arg (*args, gre_header_t *); u32 max_header_bytes = va_arg (*args, u32); gre_protocol_t p = clib_net_to_host_u16 (h->protocol); u32 indent, header_bytes; header_bytes = sizeof (h[0]); if (max_header_bytes != 0 && header_bytes > max_header_bytes) return format (s, "gre header truncated"); indent = format_get_indent (s); s = format (s, "GRE %U", format_gre_protocol, p); if (max_header_bytes != 0 && header_bytes < max_header_bytes) { gre_protocol_info_t *pi = gre_get_protocol_info (gm, p); vlib_node_t *node = vlib_get_node (gm->vlib_main, pi->node_index); if (node->format_buffer) s = format (s, "\n%U%U", format_white_space, indent, node->format_buffer, (void *) (h + 1), max_header_bytes - header_bytes); } return s; } u8 * format_gre_header (u8 * s, va_list * args) { gre_header_t *h = va_arg (*args, gre_header_t *); return format (s, "%U", format_gre_header_with_length, h, 0); } /* Returns gre protocol as an int in host byte order. */ uword unformat_gre_protocol_host_byte_order (unformat_input_t * input, va_list * args) { u16 *result = va_arg (*args, u16 *); gre_main_t *gm = &gre_main; int i; /* Named type. */ if (unformat_user (input, unformat_vlib_number_by_name, gm->protocol_info_by_name, &i)) { gre_protocol_info_t *pi = vec_elt_at_index (gm->protocol_infos, i); *result = pi->protocol; return 1; } return 0; } uword unformat_gre_protocol_net_byte_order (unformat_input_t * input, va_list * args) { u16 *result = va_arg (*args, u16 *); if (!unformat_user (input, unformat_gre_protocol_host_byte_order, result)) return 0; *result = clib_host_to_net_u16 ((u16) * result); return 1; } uword unformat_gre_header (unformat_input_t * input, va_list * args) { u8 **result = va_arg (*args, u8 **); gre_header_t _h, *h = &_h; u16 p; if (!unformat (input, "%U", unformat_gre_protocol_host_byte_order, &p)) return 0; h->protocol = clib_host_to_net_u16 (p); /* Add header to result. */ { void *p; u32 n_bytes = sizeof (h[0]); vec_add2 (*result, p, n_bytes); clib_memcpy (p, h, n_bytes); } return 1; } static int gre_proto_from_vnet_link (vnet_link_t link) { switch (link) { case VNET_LINK_IP4: return (GRE_PROTOCOL_ip4); case VNET_LINK_IP6: return (GRE_PROTOCOL_ip6); case VNET_LINK_MPLS: return (GRE_PROTOCOL_mpls_unicast); case VNET_LINK_ETHERNET: return (GRE_PROTOCOL_teb); case VNET_LINK_ARP: return (GRE_PROTOCOL_arp); case VNET_LINK_NSH: ASSERT (0); break; } ASSERT (0); return (GRE_PROTOCOL_ip4); } static u8 * gre_build_rewrite (vnet_main_t * vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_address) { gre_main_t *gm = &gre_main; const ip46_address_t *dst; ip4_and_gre_header_t *h4; ip6_and_gre_header_t *h6; gre_header_t *gre; u8 *rewrite = NULL; gre_tunnel_t *t; u32 ti; u8 is_ipv6; dst = dst_address; ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; if (~0 == ti) /* not one of ours */ return (0); t = pool_elt_at_index (gm->tunnels, ti); is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0; if (!is_ipv6) { vec_validate (rewrite, sizeof (*h4) - 1); h4 = (ip4_and_gre_header_t *) rewrite; gre = &h4->gre; h4->ip4.ip_version_and_header_length = 0x45; h4->ip4.ttl = 254; h4->ip4.protocol = IP_PROTOCOL_GRE; /* fixup ip4 header length and checksum after-the-fact */ h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32; h4->ip4.dst_address.as_u32 = dst->ip4.as_u32; h4->ip4.checksum = ip4_header_checksum (&h4->ip4); } else { vec_validate (rewrite, sizeof (*h6) - 1); h6 = (ip6_and_gre_header_t *) rewrite; gre = &h6->gre; h6->ip6.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (6 << 28); h6->ip6.hop_limit = 255; h6->ip6.protocol = IP_PROTOCOL_GRE; /* fixup ip6 header length and checksum after-the-fact */ h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0]; h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1]; h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0]; h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1]; } if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN)) { gre->protocol = clib_host_to_net_u16 (GRE_PROTOCOL_erspan); gre->flags_and_version = clib_host_to_net_u16 (GRE_FLAGS_SEQUENCE); } else gre->protocol = clib_host_to_net_u16 (gre_proto_from_vnet_link (link_type)); return (rewrite); } static void gre44_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { tunnel_encap_decap_flags_t flags; ip4_and_gre_header_t *ip0; ip0 = vlib_buffer_get_current (b0); flags = pointer_to_uword (data); /* Fixup the checksum and len fields in the GRE tunnel encap * that was applied at the midchain node */ ip0->ip4.length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); tunnel_encap_fixup_4o4 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip4); ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4); } static void gre64_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { tunnel_encap_decap_flags_t flags; ip4_and_gre_header_t *ip0; ip0 = vlib_buffer_get_current (b0); flags = pointer_to_uword (data); /* Fixup the checksum and len fields in the GRE tunnel encap * that was applied at the midchain node */ ip0->ip4.length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); tunnel_encap_fixup_6o4 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip4); ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4); } static void grex4_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { ip4_header_t *ip0; ip0 = vlib_buffer_get_current (b0); /* Fixup the checksum and len fields in the GRE tunnel encap * that was applied at the midchain node */ ip0->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); ip0->checksum = ip4_header_checksum (ip0); } static void gre46_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { tunnel_encap_decap_flags_t flags; ip6_and_gre_header_t *ip0; ip0 = vlib_buffer_get_current (b0); flags = pointer_to_uword (data); /* Fixup the payload length field in the GRE tunnel encap that was applied * at the midchain node */ ip0->ip6.payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - sizeof (ip0->ip6)); tunnel_encap_fixup_4o6 (flags, b0, (ip4_header_t *) (ip0 + 1), &ip0->ip6); } static void gre66_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { tunnel_encap_decap_flags_t flags; ip6_and_gre_header_t *ip0; ip0 = vlib_buffer_get_current (b0); flags = pointer_to_uword (data); /* Fixup the payload length field in the GRE tunnel encap that was applied * at the midchain node */ ip0->ip6.payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - sizeof (ip0->ip6)); tunnel_encap_fixup_6o6 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip6); } static void grex6_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data) { ip6_and_gre_header_t *ip0; ip0 = vlib_buffer_get_current (b0); /* Fixup the payload length field in the GRE tunnel encap that was applied * at the midchain node */ ip0->ip6.payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - sizeof (ip0->ip6)); } /** * return the appropriate fixup function given the overlay (link-type) and * underlay (fproto) combination */ static adj_midchain_fixup_t gre_get_fixup (fib_protocol_t fproto, vnet_link_t lt) { if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP6) return (gre66_fixup); if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP4) return (gre46_fixup); if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP6) return (gre64_fixup); if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP4) return (gre44_fixup); if (fproto == FIB_PROTOCOL_IP6) return (grex6_fixup); if (fproto == FIB_PROTOCOL_IP4) return (grex4_fixup); ASSERT (0); return (gre44_fixup); } void gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) { gre_main_t *gm = &gre_main; gre_tunnel_t *t; adj_flags_t af; u32 ti; ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; t = pool_elt_at_index (gm->tunnels, ti); if (t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH) af = ADJ_FLAG_MIDCHAIN_FIXUP_FLOW_HASH; else af = ADJ_FLAG_MIDCHAIN_IP_STACK; if (VNET_LINK_ETHERNET == adj_get_link_type (ai)) af |= ADJ_FLAG_MIDCHAIN_NO_COUNT; adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (t->tunnel_dst.fp_proto, adj_get_link_type (ai)), uword_to_pointer (t->flags, void *), af, gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), &t->tunnel_dst.fp_addr)); gre_tunnel_stack (ai); } adj_walk_rc_t mgre_mk_complete_walk (adj_index_t ai, void *data) { mgre_walk_ctx_t *ctx = data; adj_flags_t af; if (ctx->t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH) af = ADJ_FLAG_MIDCHAIN_FIXUP_FLOW_HASH; else af = ADJ_FLAG_MIDCHAIN_IP_STACK; adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (ctx->t->tunnel_dst.fp_proto, adj_get_link_type (ai)), uword_to_pointer (ctx->t->flags, void *), af, gre_build_rewrite (vnet_get_main (), ctx->t->sw_if_index, adj_get_link_type (ai), &teib_entry_get_nh (ctx->ne)->fp_addr)); teib_entry_adj_stack (ctx->ne, ai); return (ADJ_WALK_RC_CONTINUE); } adj_walk_rc_t mgre_mk_incomplete_walk (adj_index_t ai, void *data) { gre_tunnel_t *t = data; adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (t->tunnel_dst.fp_proto, adj_get_link_type (ai)), NULL, ADJ_FLAG_NONE, NULL); adj_midchain_delegate_unstack (ai); return (ADJ_WALK_RC_CONTINUE); } void mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) { gre_main_t *gm = &gre_main; ip_adjacency_t *adj; teib_entry_t *ne; gre_tunnel_t *t; u32 ti; adj = adj_get (ai); ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; t = pool_elt_at_index (gm->tunnels, ti); ne = teib_entry_find_46 (sw_if_index, adj->ia_nh_proto, &adj->sub_type.nbr.next_hop); if (NULL == ne) // no NHRP entry to provide the next-hop return; mgre_walk_ctx_t ctx = { .t = t, .ne = ne }; adj_nbr_walk_nh (sw_if_index, adj->ia_nh_proto, &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, &ctx); } #endif /* CLIB_MARCH_VARIANT */ typedef enum { GRE_ENCAP_NEXT_L2_MIDCHAIN, GRE_ENCAP_N_NEXT, } gre_encap_next_t; /** * @brief TX function. Only called for L2 payload including TEB or ERSPAN. * L3 traffic uses the adj-midchains. */ static_always_inline u32 gre_encap_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, gre_tunnel_type_t type) { gre_main_t *gm = &gre_main; u32 *from, n_left_from; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u32 sw_if_index[2] = { ~0, ~0 }; const gre_tunnel_t *gt[2] = { 0 }; adj_index_t adj_index[2] = { ADJ_INDEX_INVALID, ADJ_INDEX_INVALID }; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); while (n_left_from >= 2) { if (PREDICT_FALSE (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX])) { const vnet_hw_interface_t *hi; sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]); gt[0] = &gm->tunnels[hi->dev_instance]; adj_index[0] = gt[0]->l2_adj_index; } if (PREDICT_FALSE (sw_if_index[1] != vnet_buffer (b[1])->sw_if_index[VLIB_TX])) { const vnet_hw_interface_t *hi; sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX]; hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[1]); gt[1] = &gm->tunnels[hi->dev_instance]; adj_index[1] = gt[1]->l2_adj_index; } vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0]; vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = adj_index[1]; if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; u32 seq_num; u64 hdr; vlib_buffer_advance (b[0], -sizeof (erspan_t2_t)); h0 = vlib_buffer_get_current (b[0]); seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1); hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h0->seq_num = clib_host_to_net_u32 (seq_num); h0->t2_u64 = hdr; h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id); } if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; u32 seq_num; u64 hdr; vlib_buffer_advance (b[1], -sizeof (erspan_t2_t)); h0 = vlib_buffer_get_current (b[1]); seq_num = clib_atomic_fetch_add (&gt[1]->gre_sn->seq_num, 1); hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h0->seq_num = clib_host_to_net_u32 (seq_num); h0->t2_u64 = hdr; h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[1]->session_id); } if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { gre_tx_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); tr->tunnel_id = gt[0] - gm->tunnels; tr->src = gt[0]->tunnel_src; tr->dst = gt[0]->tunnel_dst.fp_addr; tr->length = vlib_buffer_length_in_chain (vm, b[0]); } if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED)) { gre_tx_trace_t *tr = vlib_add_trace (vm, node, b[1], sizeof (*tr)); tr->tunnel_id = gt[1] - gm->tunnels; tr->src = gt[1]->tunnel_src; tr->dst = gt[1]->tunnel_dst.fp_addr; tr->length = vlib_buffer_length_in_chain (vm, b[1]); } b += 2; n_left_from -= 2; } while (n_left_from >= 1) { if (PREDICT_FALSE (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX])) { const vnet_hw_interface_t *hi; sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]); gt[0] = &gm->tunnels[hi->dev_instance]; adj_index[0] = gt[0]->l2_adj_index; } vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0]; if (type == GRE_TUNNEL_TYPE_ERSPAN) { /* Encap GRE seq# and ERSPAN type II header */ erspan_t2_t *h0; u32 seq_num; u64 hdr; ASSERT (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN); vlib_buffer_advance (b[0], -sizeof (erspan_t2_t)); h0 = vlib_buffer_get_current (b[0]); seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1); hdr = clib_host_to_net_u64 (ERSPAN_HDR2); h0->seq_num = clib_host_to_net_u32 (seq_num); h0->t2_u64 = hdr; h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id); } if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { gre_tx_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); tr->tunnel_id = gt[0] - gm->tunnels; tr->src = gt[0]->tunnel_src; tr->dst = gt[0]->tunnel_dst.fp_addr; tr->length = vlib_buffer_length_in_chain (vm, b[0]); } b += 1; n_left_from -= 1; } vlib_buffer_enqueue_to_single_next (vm, node, from, GRE_ENCAP_NEXT_L2_MIDCHAIN, frame->n_vectors); vlib_node_increment_counter (vm, node->node_index, GRE_ERROR_PKTS_ENCAP, frame->n_vectors); return frame->n_vectors; } static char *gre_error_strings[] = { #define gre_error(n,s) s, #include "error.def" #undef gre_error }; VLIB_NODE_FN (gre_teb_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_TEB)); } VLIB_NODE_FN (gre_erspan_encap_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_ERSPAN)); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (gre_teb_encap_node) = { .name = "gre-teb-encap", .vector_size = sizeof (u32), .format_trace = format_gre_tx_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = GRE_N_ERROR, .error_strings = gre_error_strings, .n_next_nodes = GRE_ENCAP_N_NEXT, .next_nodes = { [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain", }, }; VLIB_REGISTER_NODE (gre_erspan_encap_node) = { .name = "gre-erspan-encap", .vector_size = sizeof (u32), .format_trace = format_gre_tx_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = GRE_N_ERROR, .error_strings = gre_error_strings, .n_next_nodes = GRE_ENCAP_N_NEXT, .next_nodes = { [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain", }, }; /* *INDENT-ON* */ #ifndef CLIB_MARCH_VARIANT static u8 * format_gre_tunnel_name (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); gre_main_t *gm = &gre_main; gre_tunnel_t *t; if (dev_instance >= vec_len (gm->tunnels)) return format (s, "<improperly-referenced>"); t = pool_elt_at_index (gm->tunnels, dev_instance); return format (s, "gre%d", t->user_instance); } static u8 * format_gre_device (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); CLIB_UNUSED (int verbose) = va_arg (*args, int); s = format (s, "GRE tunnel: id %d\n", dev_instance); return s; } static int gre_tunnel_desc (u32 sw_if_index, ip46_address_t * src, ip46_address_t * dst, u8 * is_l2) { gre_main_t *gm = &gre_main; gre_tunnel_t *t; u32 ti; ti = gm->tunnel_index_by_sw_if_index[sw_if_index]; if (~0 == ti) /* not one of ours */ return -1; t = pool_elt_at_index (gm->tunnels, ti); *src = t->tunnel_src; *dst = t->tunnel_dst.fp_addr; *is_l2 = t->type == GRE_TUNNEL_TYPE_TEB; return (0); } /* *INDENT-OFF* */ VNET_DEVICE_CLASS (gre_device_class) = { .name = "GRE tunnel device", .format_device_name = format_gre_tunnel_name, .format_device = format_gre_device, .format_tx_trace = format_gre_tx_trace, .admin_up_down_function = gre_interface_admin_up_down, .ip_tun_desc = gre_tunnel_desc, #ifdef SOON .clear counter = 0; #endif }; VNET_HW_INTERFACE_CLASS (gre_hw_interface_class) = { .name = "GRE", .format_header = format_gre_header_with_length, .unformat_header = unformat_gre_header, .build_rewrite = gre_build_rewrite, .update_adjacency = gre_update_adj, .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, }; VNET_HW_INTERFACE_CLASS (mgre_hw_interface_class) = { .name = "mGRE", .format_header = format_gre_header_with_length, .unformat_header = unformat_gre_header, .build_rewrite = gre_build_rewrite, .update_adjacency = mgre_update_adj, .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA, }; /* *INDENT-ON* */ #endif /* CLIB_MARCH_VARIANT */ static void add_protocol (gre_main_t * gm, gre_protocol_t protocol, char *protocol_name) { gre_protocol_info_t *pi; u32 i; vec_add2 (gm->protocol_infos, pi, 1); i = pi - gm->protocol_infos; pi->name = protocol_name; pi->protocol = protocol; pi->next_index = pi->node_index = ~0; hash_set (gm->protocol_info_by_protocol, protocol, i); hash_set_mem (gm->protocol_info_by_name, pi->name, i); } static clib_error_t * gre_init (vlib_main_t * vm) { gre_main_t *gm = &gre_main; clib_error_t *error; ip_main_t *im = &ip_main; ip_protocol_info_t *pi; clib_memset (gm, 0, sizeof (gm[0])); gm->vlib_main = vm; gm->vnet_main = vnet_get_main (); if ((error = vlib_call_init_function (vm, ip_main_init))) return error; if ((error = vlib_call_init_function (vm, ip4_lookup_init))) return error; if ((error = vlib_call_init_function (vm, ip6_lookup_init))) return error; /* Set up the ip packet generator */ pi = ip_get_protocol_info (im, IP_PROTOCOL_GRE); pi->format_header = format_gre_header; pi->unformat_pg_edit = unformat_pg_gre_header; gm->protocol_info_by_name = hash_create_string (0, sizeof (uword)); gm->protocol_info_by_protocol = hash_create (0, sizeof (uword)); gm->tunnel_by_key4 = hash_create_mem (0, sizeof (gre_tunnel_key4_t), sizeof (uword)); gm->tunnel_by_key6 = hash_create_mem (0, sizeof (gre_tunnel_key6_t), sizeof (uword)); gm->seq_num_by_key = hash_create_mem (0, sizeof (gre_sn_key_t), sizeof (uword)); #define _(n,s) add_protocol (gm, GRE_PROTOCOL_##s, #s); foreach_gre_protocol #undef _ return vlib_call_init_function (vm, gre_input_init); } VLIB_INIT_FUNCTION (gre_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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