host stack: update stale copyright - vpp - Vector Packet Processing

diff options

author	Florin Coras <fcoras@cisco.com>	2019-04-08 07:42:30 -0700
committer	Dave Barach <openvpp@barachs.net>	2019-04-08 20:29:16 +0000
commit	c5df8c71cc867d8120a25e4bd6d065aa63d9011c (patch)
tree	3f5088d55054b2e971a4c1cfef79d4ed504f5099 /src/vnet/udp/udp.api
parent	f3262a2dd0fd788b5ef3fc9592de17ef8bcbd897 (diff)

host stack: update stale copyright

Change-Id: I33cd6e44d126c73c1f4c16b2041ea607b4d7f39f Signed-off-by: Florin Coras <fcoras@cisco.com>

Diffstat (limited to 'src/vnet/udp/udp.api')

-rw-r--r--

src/vnet/udp/udp.api

1 files changed, 1 insertions, 1 deletions

/* * ethernet/arp.c: IP v4 ARP node * * Copyright (c) 2010 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/arp/arp.h> #include <vnet/arp/arp_packet.h> #include <vnet/fib/ip4_fib.h> #include <vnet/fib/fib_entry_src.h> #include <vnet/adj/adj_nbr.h> #include <vnet/adj/adj_mcast.h> #include <vnet/pg/pg.h> #include <vnet/ip-neighbor/ip_neighbor.h> #include <vnet/ip-neighbor/ip4_neighbor.h> #include <vnet/ip-neighbor/ip_neighbor_dp.h> #include <vlibmemory/api.h> /** * @file * @brief IPv4 ARP. * * This file contains code to manage the IPv4 ARP tables (IP Address * to MAC Address lookup). */ /** * @brief Per-interface ARP configuration and state */ typedef struct ethernet_arp_interface_t_ { /** * Is ARP enabled on this interface */ u32 enabled; } ethernet_arp_interface_t; typedef struct { /* Hash tables mapping name to opcode. */ uword *opcode_by_name; /** Per interface state */ ethernet_arp_interface_t *ethernet_arp_by_sw_if_index; /* ARP feature arc index */ u8 feature_arc_index; } ethernet_arp_main_t; static ethernet_arp_main_t ethernet_arp_main; static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 }; static uword unformat_ethernet_arp_opcode_host_byte_order (unformat_input_t * input, va_list * args) { int *result = va_arg (*args, int *); ethernet_arp_main_t *am = &ethernet_arp_main; int x, i; /* Numeric opcode. */ if (unformat (input, "0x%x", &x) || unformat (input, "%d", &x)) { if (x >= (1 << 16)) return 0; *result = x; return 1; } /* Named type. */ if (unformat_user (input, unformat_vlib_number_by_name, am->opcode_by_name, &i)) { *result = i; return 1; } return 0; } static uword unformat_ethernet_arp_opcode_net_byte_order (unformat_input_t * input, va_list * args) { int *result = va_arg (*args, int *); if (!unformat_user (input, unformat_ethernet_arp_opcode_host_byte_order, result)) return 0; *result = clib_host_to_net_u16 ((u16) * result); return 1; } typedef struct { u8 packet_data[64]; } ethernet_arp_input_trace_t; static u8 * format_ethernet_arp_input_trace (u8 * s, va_list * va) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *); s = format (s, "%U", format_ethernet_arp_header, t->packet_data, sizeof (t->packet_data)); return s; } static int arp_is_enabled (ethernet_arp_main_t * am, u32 sw_if_index) { if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index) return 0; return (am->ethernet_arp_by_sw_if_index[sw_if_index].enabled); } static void arp_enable (ethernet_arp_main_t * am, u32 sw_if_index) { if (arp_is_enabled (am, sw_if_index)) return; vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index); am->ethernet_arp_by_sw_if_index[sw_if_index].enabled = 1; vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 1, NULL, 0); vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 0, NULL, 0); } static void arp_disable (ethernet_arp_main_t * am, u32 sw_if_index) { if (!arp_is_enabled (am, sw_if_index)) return; vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 1, NULL, 0); vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 0, NULL, 0); am->ethernet_arp_by_sw_if_index[sw_if_index].enabled = 0; } static int arp_unnumbered (vlib_buffer_t * p0, u32 input_sw_if_index, u32 conn_sw_if_index) { vnet_main_t *vnm = vnet_get_main (); vnet_interface_main_t *vim = &vnm->interface_main; vnet_sw_interface_t *si; /* verify that the input interface is unnumbered to the connected. * the connected interface is the interface on which the subnet is * configured */ si = &vim->sw_interfaces[input_sw_if_index]; if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED && (si->unnumbered_sw_if_index == conn_sw_if_index))) { /* the input interface is not unnumbered to the interface on which * the sub-net is configured that covers the ARP request. * So this is not the case for unnumbered.. */ return 0; } return !0; } always_inline u32 arp_learn (u32 sw_if_index, const ethernet_arp_ip4_over_ethernet_address_t * addr) { /* *INDENT-OFF* */ ip_neighbor_learn_t l = { .ip = { .ip.ip4 = addr->ip4, .version = AF_IP4, }, .mac = addr->mac, .sw_if_index = sw_if_index, }; /* *INDENT-ON* */ ip_neighbor_learn_dp (&l); return (ARP_ERROR_L3_SRC_ADDRESS_LEARNED); } typedef enum arp_input_next_t_ { ARP_INPUT_NEXT_DROP, ARP_INPUT_NEXT_DISABLED, ARP_INPUT_N_NEXT, } arp_input_next_t; static uword arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, next_index, *from, *to_next, n_left_to_next; ethernet_arp_main_t *am = &ethernet_arp_main; 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) vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, /* stride */ 1, sizeof (ethernet_arp_input_trace_t)); while (n_left_from > 0) { vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { const ethernet_arp_header_t *arp0; arp_input_next_t next0; vlib_buffer_t *p0; u32 pi0, error0; pi0 = to_next[0] = from[0]; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; p0 = vlib_get_buffer (vm, pi0); arp0 = vlib_buffer_get_current (p0); error0 = ARP_ERROR_REPLIES_SENT; next0 = ARP_INPUT_NEXT_DROP; error0 = (arp0->l2_type != clib_net_to_host_u16 ( ETHERNET_ARP_HARDWARE_TYPE_ethernet) ? ARP_ERROR_L2_TYPE_NOT_ETHERNET : error0); error0 = (arp0->l3_type != clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ? ARP_ERROR_L3_TYPE_NOT_IP4 : error0); error0 = (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ? ARP_ERROR_L3_DST_ADDRESS_UNSET : error0); if (ARP_ERROR_REPLIES_SENT == error0) { next0 = ARP_INPUT_NEXT_DISABLED; vnet_feature_arc_start (am->feature_arc_index, vnet_buffer (p0)->sw_if_index[VLIB_RX], &next0, p0); } else p0->error = node->errors[error0]; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, pi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } typedef enum arp_disabled_next_t_ { ARP_DISABLED_NEXT_DROP, ARP_DISABLED_N_NEXT, } arp_disabled_next_t; static uword arp_disabled (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, next_index, *from, *to_next, n_left_to_next; 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) vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, /* stride */ 1, sizeof (ethernet_arp_input_trace_t)); while (n_left_from > 0) { vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { arp_disabled_next_t next0 = ARP_DISABLED_NEXT_DROP; vlib_buffer_t *p0; u32 pi0, error0; next0 = ARP_DISABLED_NEXT_DROP; error0 = ARP_ERROR_DISABLED; pi0 = to_next[0] = from[0]; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; p0 = vlib_get_buffer (vm, pi0); p0->error = node->errors[error0]; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, pi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } enum arp_dst_fib_type { ARP_DST_FIB_NONE, ARP_DST_FIB_ADJ, ARP_DST_FIB_CONN }; /* * we're looking for FIB sources that indicate the destination * is attached. There may be interposed DPO prior to the one * we are looking for */ static enum arp_dst_fib_type arp_dst_fib_check (const fib_node_index_t fei, fib_entry_flag_t * flags) { const fib_entry_t *entry = fib_entry_get (fei); const fib_entry_src_t *entry_src; fib_source_t src; /* *INDENT-OFF* */ FOR_EACH_SRC_ADDED(entry, entry_src, src, ({ *flags = fib_entry_get_flags_for_source (fei, src); if (fib_entry_is_sourced (fei, FIB_SOURCE_ADJ)) return ARP_DST_FIB_ADJ; else if (FIB_ENTRY_FLAG_CONNECTED & *flags) return ARP_DST_FIB_CONN; })) /* *INDENT-ON* */ return ARP_DST_FIB_NONE; } static uword arp_reply (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vnet_main_t *vnm = vnet_get_main (); u32 n_left_from, next_index, *from, *to_next; u32 n_replies_sent = 0; 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) vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, /* stride */ 1, sizeof (ethernet_arp_input_trace_t)); 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 > 0 && n_left_to_next > 0) { vlib_buffer_t *p0; ethernet_arp_header_t *arp0; ethernet_header_t *eth_rx; const ip4_address_t *if_addr0; u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0; u8 dst_is_local0, is_vrrp_reply0; fib_node_index_t dst_fei, src_fei; const fib_prefix_t *pfx0; fib_entry_flag_t src_flags, dst_flags; pi0 = from[0]; to_next[0] = pi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; p0 = vlib_get_buffer (vm, pi0); arp0 = vlib_buffer_get_current (p0); /* Fill in ethernet header. */ eth_rx = ethernet_buffer_get_header (p0); next0 = ARP_REPLY_NEXT_DROP; error0 = ARP_ERROR_REPLIES_SENT; sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; /* Check that IP address is local and matches incoming interface. */ fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); if (~0 == fib_index0) { error0 = ARP_ERROR_INTERFACE_NO_TABLE; goto drop; } { /* * we're looking for FIB entries that indicate the source * is attached. There may be more specific non-attached * routes that match the source, but these do not influence * whether we respond to an ARP request, i.e. they do not * influence whether we are the correct way for the sender * to reach us, they only affect how we reach the sender. */ fib_entry_t *src_fib_entry; const fib_prefix_t *pfx; fib_entry_src_t *src; fib_source_t source; int attached; int mask; mask = 32; attached = 0; do { src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), &arp0-> ip4_over_ethernet[0].ip4, mask); src_fib_entry = fib_entry_get (src_fei); /* * It's possible that the source that provides the * flags we need, or the flags we must not have, * is not the best source, so check then all. */ /* *INDENT-OFF* */ FOR_EACH_SRC_ADDED(src_fib_entry, src, source, ({ src_flags = fib_entry_get_flags_for_source (src_fei, source); /* Reject requests/replies with our local interface address. */ if (FIB_ENTRY_FLAG_LOCAL & src_flags) { error0 = ARP_ERROR_L3_SRC_ADDRESS_IS_LOCAL; /* * When VPP has an interface whose address is also * applied to a TAP interface on the host, then VPP's * TAP interface will be unnumbered to the 'real' * interface and do proxy ARP from the host. * The curious aspect of this setup is that ARP requests * from the host will come from the VPP's own address. * So don't drop immediately here, instead go see if this * is a proxy ARP case. */ goto next_feature; } /* A Source must also be local to subnet of matching * interface address. */ if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) || (FIB_ENTRY_FLAG_CONNECTED & src_flags)) { attached = 1; break; } /* * else * The packet was sent from an address that is not * connected nor attached i.e. it is not from an * address that is covered by a link's sub-net, * nor is it a already learned host resp. */ })); /* *INDENT-ON* */ /* * shorter mask lookup for the next iteration. */ pfx = fib_entry_get_prefix (src_fei); mask = pfx->fp_len - 1; /* * continue until we hit the default route or we find * the attached we are looking for. The most likely * outcome is we find the attached with the first source * on the first lookup. */ } while (!attached && !fib_entry_is_sourced (src_fei, FIB_SOURCE_DEFAULT_ROUTE)); if (!attached) { /* * the matching route is a not attached, i.e. it was * added as a result of routing, rather than interface/ARP * configuration. If the matching route is not a host route * (i.e. a /32) */ error0 = ARP_ERROR_L3_SRC_ADDRESS_NOT_LOCAL; goto drop; } } dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0), &arp0->ip4_over_ethernet[1].ip4, 32); conn_sw_if_index0 = fib_entry_get_any_resolving_interface (dst_fei); switch (arp_dst_fib_check (dst_fei, &dst_flags)) { case ARP_DST_FIB_ADJ: /* * We matched an adj-fib on ths source subnet (a /32 previously * added as a result of ARP). If this request is a gratuitous * ARP, then learn from it. * The check for matching an adj-fib, is to prevent hosts * from spamming us with gratuitous ARPS that might otherwise * blow our ARP cache */ if (conn_sw_if_index0 != sw_if_index0) error0 = ARP_ERROR_L3_DST_ADDRESS_NOT_LOCAL; else if (arp0->ip4_over_ethernet[0].ip4.as_u32 == arp0->ip4_over_ethernet[1].ip4.as_u32) { vlib_increment_simple_counter ( &ip_neighbor_counters[AF_IP4] .ipnc[VLIB_RX][IP_NEIGHBOR_CTR_GRAT], vm->thread_index, sw_if_index0, 1); error0 = arp_learn (sw_if_index0, &arp0->ip4_over_ethernet[0]); } goto next_feature; case ARP_DST_FIB_CONN: /* destination is connected, continue to process */ break; case ARP_DST_FIB_NONE: /* destination is not connected, stop here */ error0 = ARP_ERROR_L3_DST_ADDRESS_NOT_LOCAL; goto next_feature; } dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags); pfx0 = fib_entry_get_prefix (dst_fei); if_addr0 = &pfx0->fp_addr.ip4; is_vrrp_reply0 = ((arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) && (!memcmp (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix, sizeof (vrrp_prefix)))); /* Trash ARP packets whose ARP-level source addresses do not match their L2-frame-level source addresses, unless it's a reply from a VRRP virtual router */ if (!ethernet_mac_address_equal (eth_rx->src_address, arp0->ip4_over_ethernet[0].mac.bytes) && !is_vrrp_reply0) { error0 = ARP_ERROR_L2_ADDRESS_MISMATCH; goto drop; } vlib_increment_simple_counter ( &ip_neighbor_counters[AF_IP4] .ipnc[VLIB_RX][arp0->opcode == clib_host_to_net_u16 ( ETHERNET_ARP_OPCODE_reply) ? IP_NEIGHBOR_CTR_REPLY : IP_NEIGHBOR_CTR_REQUEST], vm->thread_index, sw_if_index0, 1); /* Learn or update sender's mapping only for replies to addresses * that are local to the subnet */ if (arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)) { if (dst_is_local0) error0 = arp_learn (sw_if_index0, &arp0->ip4_over_ethernet[0]); else /* a reply for a non-local destination could be a GARP. * GARPs for hosts we know were handled above, so this one * we drop */ error0 = ARP_ERROR_L3_DST_ADDRESS_NOT_LOCAL; goto next_feature; } else if (arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) && (dst_is_local0 == 0)) { goto next_feature; } /* Honor unnumbered interface, if any */ if (sw_if_index0 != conn_sw_if_index0 || sw_if_index0 != fib_entry_get_resolving_interface (src_fei)) { /* * The interface the ARP is sent to or was received on is not the * interface on which the covering prefix is configured. * Maybe this is a case for unnumbered. */ if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0)) { error0 = ARP_ERROR_UNNUMBERED_MISMATCH; goto drop; } } if (arp0->ip4_over_ethernet[0].ip4.as_u32 == arp0->ip4_over_ethernet[1].ip4.as_u32) { error0 = ARP_ERROR_GRATUITOUS_ARP; goto drop; } next0 = arp_mk_reply (vnm, p0, sw_if_index0, if_addr0, arp0, eth_rx); /* We are going to reply to this request, so, in the absence of errors, learn the sender */ if (!error0) error0 = arp_learn (sw_if_index0, &arp0->ip4_over_ethernet[1]); vlib_increment_simple_counter ( &ip_neighbor_counters[AF_IP4].ipnc[VLIB_TX][IP_NEIGHBOR_CTR_REPLY], vm->thread_index, sw_if_index0, 1); n_replies_sent += 1; goto enqueue; next_feature: vnet_feature_next (&next0, p0); drop: p0->error = node->errors[error0]; enqueue: vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, pi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } vlib_error_count (vm, node->node_index, ARP_ERROR_REPLIES_SENT, n_replies_sent); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (arp_input_node, static) = { .function = arp_input, .name = "arp-input", .vector_size = sizeof (u32), .n_errors = ARP_N_ERROR, .error_counters = arp_error_counters, .n_next_nodes = ARP_INPUT_N_NEXT, .next_nodes = { [ARP_INPUT_NEXT_DROP] = "error-drop", [ARP_INPUT_NEXT_DISABLED] = "arp-disabled", }, .format_buffer = format_ethernet_arp_header, .format_trace = format_ethernet_arp_input_trace, }; VLIB_REGISTER_NODE (arp_disabled_node, static) = { .function = arp_disabled, .name = "arp-disabled", .vector_size = sizeof (u32), .n_errors = ARP_N_ERROR, .error_counters = arp_error_counters, .n_next_nodes = ARP_DISABLED_N_NEXT, .next_nodes = { [ARP_INPUT_NEXT_DROP] = "error-drop", }, .format_buffer = format_ethernet_arp_header, .format_trace = format_ethernet_arp_input_trace, }; VLIB_REGISTER_NODE (arp_reply_node, static) = { .function = arp_reply, .name = "arp-reply", .vector_size = sizeof (u32), .n_errors = ARP_N_ERROR, .error_counters = arp_error_counters, .n_next_nodes = ARP_REPLY_N_NEXT, .next_nodes = { [ARP_REPLY_NEXT_DROP] = "error-drop", [ARP_REPLY_NEXT_REPLY_TX] = "interface-output", }, .format_buffer = format_ethernet_arp_header, .format_trace = format_ethernet_arp_input_trace, }; /* Built-in ARP rx feature path definition */ VNET_FEATURE_ARC_INIT (arp_feat, static) = { .arc_name = "arp", .start_nodes = VNET_FEATURES ("arp-input"), .last_in_arc = "error-drop", .arc_index_ptr = &ethernet_arp_main.feature_arc_index, }; VNET_FEATURE_INIT (arp_reply_feat_node, static) = { .arc_name = "arp", .node_name = "arp-reply", .runs_before = VNET_FEATURES ("arp-disabled"), }; VNET_FEATURE_INIT (arp_proxy_feat_node, static) = { .arc_name = "arp", .node_name = "arp-proxy", .runs_after = VNET_FEATURES ("arp-reply"), .runs_before = VNET_FEATURES ("arp-disabled"), }; VNET_FEATURE_INIT (arp_disabled_feat_node, static) = { .arc_name = "arp", .node_name = "arp-disabled", .runs_before = VNET_FEATURES ("error-drop"), }; VNET_FEATURE_INIT (arp_drop_feat_node, static) = { .arc_name = "arp", .node_name = "error-drop", .runs_before = 0, /* last feature */ }; /* *INDENT-ON* */ typedef struct { pg_edit_t l2_type, l3_type; pg_edit_t n_l2_address_bytes, n_l3_address_bytes; pg_edit_t opcode; struct { pg_edit_t mac; pg_edit_t ip4; } ip4_over_ethernet[2]; } pg_ethernet_arp_header_t; static inline void pg_ethernet_arp_header_init (pg_ethernet_arp_header_t * p) { /* Initialize fields that are not bit fields in the IP header. */ #define _(f) pg_edit_init (&p->f, ethernet_arp_header_t, f); _(l2_type); _(l3_type); _(n_l2_address_bytes); _(n_l3_address_bytes); _(opcode); _(ip4_over_ethernet[0].mac); _(ip4_over_ethernet[0].ip4); _(ip4_over_ethernet[1].mac); _(ip4_over_ethernet[1].ip4); #undef _ } uword unformat_pg_arp_header (unformat_input_t * input, va_list * args) { pg_stream_t *s = va_arg (*args, pg_stream_t *); pg_ethernet_arp_header_t *p; u32 group_index; p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ethernet_arp_header_t), &group_index); pg_ethernet_arp_header_init (p); /* Defaults. */ pg_edit_set_fixed (&p->l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet); pg_edit_set_fixed (&p->l3_type, ETHERNET_TYPE_IP4); pg_edit_set_fixed (&p->n_l2_address_bytes, 6); pg_edit_set_fixed (&p->n_l3_address_bytes, 4); if (!unformat (input, "%U: %U/%U -> %U/%U", unformat_pg_edit, unformat_ethernet_arp_opcode_net_byte_order, &p->opcode, unformat_pg_edit, unformat_mac_address_t, &p->ip4_over_ethernet[0].mac, unformat_pg_edit, unformat_ip4_address, &p->ip4_over_ethernet[0].ip4, unformat_pg_edit, unformat_mac_address_t, &p->ip4_over_ethernet[1].mac, unformat_pg_edit, unformat_ip4_address, &p->ip4_over_ethernet[1].ip4)) { /* Free up any edits we may have added. */ pg_free_edit_group (s); return 0; } return 1; } /* * callback when an interface address is added or deleted */ static void arp_enable_disable_interface (ip4_main_t * im, uword opaque, u32 sw_if_index, u32 is_enable) { ethernet_arp_main_t *am = &ethernet_arp_main; if (is_enable) arp_enable (am, sw_if_index); else arp_disable (am, sw_if_index); } /* * Remove any arp entries associated with the specified interface */ static clib_error_t * vnet_arp_add_del_sw_interface (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) { ethernet_arp_main_t *am = &ethernet_arp_main; if (is_add) arp_disable (am, sw_if_index); return (NULL); } VNET_SW_INTERFACE_ADD_DEL_FUNCTION (vnet_arp_add_del_sw_interface); const static ip_neighbor_vft_t arp_vft = { .inv_proxy4_add = arp_proxy_add, .inv_proxy4_del = arp_proxy_del, .inv_proxy4_enable = arp_proxy_enable, .inv_proxy4_disable = arp_proxy_disable, }; static clib_error_t * ethernet_arp_init (vlib_main_t * vm) { ethernet_arp_main_t *am = &ethernet_arp_main; ip4_main_t *im = &ip4_main; pg_node_t *pn; ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index); pn = pg_get_node (arp_input_node.index); pn->unformat_edit = unformat_pg_arp_header; am->opcode_by_name = hash_create_string (0, sizeof (uword)); #define _(o) hash_set_mem (am->opcode_by_name, #o, ETHERNET_ARP_OPCODE_##o); foreach_ethernet_arp_opcode; #undef _ /* don't trace ARP error packets */ { vlib_node_runtime_t *rt = vlib_node_get_runtime (vm, arp_input_node.index); vnet_pcap_drop_trace_filter_add_del (rt->errors[ARP_ERROR_REPLIES_SENT], 1); vnet_pcap_drop_trace_filter_add_del (rt->errors[ARP_ERROR_DISABLED], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L2_TYPE_NOT_ETHERNET], 1); vnet_pcap_drop_trace_filter_add_del (rt->errors[ARP_ERROR_L3_TYPE_NOT_IP4], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L3_SRC_ADDRESS_NOT_LOCAL], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L3_DST_ADDRESS_NOT_LOCAL], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L3_DST_ADDRESS_UNSET], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L3_SRC_ADDRESS_IS_LOCAL], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L3_SRC_ADDRESS_LEARNED], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_REPLIES_RECEIVED], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_OPCODE_NOT_REQUEST], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_PROXY_ARP_REPLIES_SENT], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_L2_ADDRESS_MISMATCH], 1); vnet_pcap_drop_trace_filter_add_del (rt->errors[ARP_ERROR_GRATUITOUS_ARP], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_INTERFACE_NO_TABLE], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_INTERFACE_NOT_IP_ENABLED], 1); vnet_pcap_drop_trace_filter_add_del ( rt->errors[ARP_ERROR_UNNUMBERED_MISMATCH], 1); } { ip4_enable_disable_interface_callback_t cb = { .function = arp_enable_disable_interface, }; vec_add1 (im->enable_disable_interface_callbacks, cb); } ip_neighbor_register (AF_IP4, &arp_vft); return 0; } /* *INDENT-OFF* */ VLIB_INIT_FUNCTION (ethernet_arp_init) = { .runs_after = VLIB_INITS("ethernet_init", "ip_neighbor_init"), }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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