diff options
Diffstat (limited to 'src/plugins/gre/gre.c')
| -rw-r--r-- | src/plugins/gre/gre.c | 842 |
1 files changed, 842 insertions, 0 deletions
diff --git a/src/plugins/gre/gre.c b/src/plugins/gre/gre.c new file mode 100644 index 00000000000..ce11ee9ecb2 --- /dev/null +++ b/src/plugins/gre/gre.c @@ -0,0 +1,842 @@ +/* + * 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 <gre/gre.h> +#include <vnet/adj/adj_midchain.h> +#include <vnet/tunnel/tunnel_dp.h> +#include <vpp/app/version.h> +#include <vnet/plugin/plugin.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); + af = ADJ_FLAG_NONE; + + /* + * the user has not requested that the load-balancing be based on + * a flow hash of the inner packet. so use the stacking to choose + * a path. + */ + if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH)) + af |= ADJ_FLAG_MIDCHAIN_IP_STACK; + + 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; + + af = ADJ_FLAG_NONE; + + /* + * the user has not requested that the load-balancing be based on + * a flow hash of the inner packet. so use the stacking to choose + * a path. + */ + if (!(ctx->t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH)) + 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 TEIB entry to provide the next-hop + 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 *), ADJ_FLAG_NONE, NULL); + 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 (>[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 (>[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 (>[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)); +} + +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", + }, +}; + +#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); +} + +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, +}; +#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: + */ |