vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2017-04-20	Move vagrant stuff to extras/	Damjan Marion	11	-401/+1
2017-02-02	Update default Vagrant box to Ubuntu 16.04, VPP-616	Dave Wallace	3	-12/+22
2017-01-17	vagrant: stop rsync from wiping changes from /vpp	Padraig Connolly	1	-15/+18
2016-12-21	vagrant: Fixing sudo related vagrant errors	Ray Kinsella	1	-5/+8
2016-12-21	vagrant: updated Vagrantfile to use rsync	Ray Kinsella	2	-58/+16
2016-10-22	VPP-504: Permissions Error on Centos Vagrant VPP VM	Billy McFall	1	-1/+1
2016-09-27	VPP-308: Added workaround for failed vnet build. For some reason	Thomas F Herbert	1	-0/+1
2016-09-02	VPP-373: stop building from /vpp mount	Ed Warnicke	3	-5/+63
2016-08-02	Fix for broken vagrant installs when using Vagrant 1.8.5.	Thomas F Herbert	1	-0/+1
2016-07-21	build-root/vagrant: Fix SSE4.x for VB	Ray	1	-0/+4
2016-06-25	Vagrantfile RAM default is too small.	Keith Burns (alagalah)	2	-2/+2
2016-06-21	Vagrantfile syntax error correction - requires string input instead of integer.	Srivatsa Sangli	1	-1/+1
2016-06-20	Using env.sh file for Vagrantfile inputs, but assume some defaults	Keith Burns (alagalah)	4	-63/+98
2016-06-05	VPP-112: linux kernel info missing from build log	Dave Wallace	1	-0/+9
2016-06-01	vagrant: disable automatic update on start	Thomas Monjalon	1	-0/+1
2016-05-13	Whitespace probe for CI	Ed Warnicke	1	-1/+1
2016-05-12	Revert "Whitespace change for testing CI"	Ed Warnicke	1	-1/+1
2016-05-12	Whitespace change for testing CI	Ed Warnicke	1	-1/+1
2016-05-07	Small improvement to vagrant file	Ed Warnicke	1	-5/+5
2016-05-04	Fix for unattended in Makefile	Ed Warnicke	1	-0/+12
2016-05-02	Re-do java-8 handling, add unattended switch to toplevel Makefile	Damjan Marion	1	-1/+1
2016-05-02	Break out install.sh from build.sh	Ed Warnicke	3	-2/+31
2016-05-02	VPP-32 Increase # cpus to 2, leave RAM at 4G for virtualbox vagrant users	Keith Burns (alagalah)	1	-1/+3
2016-04-25	Break boostrap.sh into pieces	Ed Warnicke	8	-111/+132
2016-04-20	ubuntu 16.04 build support. Supporting systemd with vpp.service files.	Srivatsa Sangli	1	-0/+39
2016-04-11	vagrant: libvirt configuration.	Jeff Shaw	1	-2/+6
2016-04-09	Migrate bootstrap.ubuntu.sh to using top level Makefile	Ed Warnicke	1	-57/+12
2016-03-29	Fix to centos vagrant file	Ed Warnicke	1	-2/+2
2016-03-25	Fix vagrant centos flavor to work with top level make file	Ed Warnicke	2	-55/+31
2016-02-19	Add GDB and GDB Server to bootstrap files	Keith Burns (alagalah)	2	-1/+5
2016-02-04	Remove redundant apt-get install of dkms and debhelper.	Dave Wallace	1	-3/+0
2016-02-04	Change non-default route ethernet interfaces state to down so VPP will use them.	Dave Wallace	1	-0/+12
2016-02-03	Switched vagrant for ~/git/vpp to /vpp	Ed Warnicke	3	-7/+25
2016-02-02	Add pciutils to the CentOS vagrant bootstrap; needed to install vpp rpms	Dave Barach	1	-0/+3
2016-02-02	Enable ganglia module integration build	Dave Barach	1	-0/+8
2016-02-01	Changes to Centos bootstrap to remove ~/git/vpp if it exists before attemptin...	Keith Burns (alagalah)	1	-1/+2
2016-02-01	Vagrantfile doesn't rm git/vpp and vagrant reload --provision	Keith Burns (alagalah)	1	-1/+3
2016-01-28	vpp metrics upload via gmond plugin	Dave Barach	1	-1/+1
2016-01-18	build - Vagrant template to get more emulated PCI NICs	Vincent JARDIN	1	-0/+9
2016-01-11	Fix vagrant grub issue with ubuntu & virtualbox	Matt Johnson	1	-1/+4
2015-12-22	Update vagrant/ to install vpp packages and use vppctl	Ed Warnicke	2	-26/+29
2015-12-14	Fix to make it easy to use http proxy with Vagrant	Ed Warnicke	1	-0/+7
2015-12-08	Initial commit of vpp code.v1.0.0	Ed Warnicke	5	-0/+213

/* * Copyright (c) 2011-2016 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 BFD UDP transport layer implementation */ #include <vppinfra/types.h> #include <vlibmemory/api.h> #include <vlib/vlib.h> #include <vlib/buffer.h> #include <vnet/ip/format.h> #include <vnet/ethernet/packet.h> #include <vnet/udp/udp_local.h> #include <vnet/udp/udp_packet.h> #include <vnet/ip/lookup.h> #include <vnet/ip/icmp46_packet.h> #include <vnet/ip/ip4.h> #include <vnet/ip/ip6.h> #include <vnet/ip/ip6_packet.h> #include <vnet/ip/ip6_link.h> #include <vnet/adj/adj.h> #include <vnet/adj/adj_nbr.h> #include <vnet/dpo/receive_dpo.h> #include <vnet/fib/fib_entry.h> #include <vnet/fib/fib_table.h> #include <vnet/bfd/bfd_debug.h> #include <vnet/bfd/bfd_udp.h> #include <vnet/bfd/bfd_main.h> #include <vnet/bfd/bfd_api.h> typedef struct { bfd_main_t *bfd_main; /* hashmap - bfd session index by bfd key - used for CLI/API lookup, where * discriminator is unknown */ mhash_t bfd_session_idx_by_bfd_key; /* convenience variable */ vnet_main_t *vnet_main; /* flag indicating whether echo_source_sw_if_index holds a valid value */ int echo_source_is_set; /* loopback interface used to get echo source ip */ u32 echo_source_sw_if_index; /* node index of "ip4-arp" node */ u32 ip4_arp_idx; /* node index of "ip6-discover-neighbor" node */ u32 ip6_ndp_idx; /* node index of "ip4-rewrite" node */ u32 ip4_rewrite_idx; /* node index of "ip6-rewrite" node */ u32 ip6_rewrite_idx; /* node index of "ip4-midchain" node */ u32 ip4_midchain_idx; /* node index of "ip6-midchain" node */ u32 ip6_midchain_idx; /* log class */ vlib_log_class_t log_class; /* number of active udp4 sessions */ u32 udp4_sessions_count; /* number of active udp6 sessions */ u32 udp6_sessions_count; } bfd_udp_main_t; static vlib_node_registration_t bfd_udp4_input_node; static vlib_node_registration_t bfd_udp6_input_node; static vlib_node_registration_t bfd_udp_echo4_input_node; static vlib_node_registration_t bfd_udp_echo6_input_node; bfd_udp_main_t bfd_udp_main; vnet_api_error_t bfd_udp_set_echo_source (u32 sw_if_index) { vnet_sw_interface_t *sw_if = vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, sw_if_index); if (sw_if) { bfd_udp_main.echo_source_sw_if_index = sw_if_index; bfd_udp_main.echo_source_is_set = 1; return 0; } return VNET_API_ERROR_BFD_ENOENT; } vnet_api_error_t bfd_udp_del_echo_source (u32 sw_if_index) { bfd_udp_main.echo_source_sw_if_index = ~0; bfd_udp_main.echo_source_is_set = 0; return 0; } int bfd_udp_is_echo_available (bfd_transport_e transport) { if (!bfd_udp_main.echo_source_is_set) { BFD_DBG ("UDP echo source not set - echo not available"); return 0; } /* * for the echo to work, we need a loopback interface with at least one * address with netmask length at most 31 (ip4) or 127 (ip6) so that we can * pick an unused address from that subnet */ vnet_sw_interface_t *sw_if = vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, bfd_udp_main.echo_source_sw_if_index); if (sw_if && sw_if->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) { if (BFD_TRANSPORT_UDP4 == transport) { ip4_main_t *im = &ip4_main; ip_interface_address_t *ia = NULL; /* *INDENT-OFF* */ foreach_ip_interface_address (&im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, 0 /* honor unnumbered */, ({ if (ia->address_length <= 31) { return 1; } })); /* *INDENT-ON* */ } else if (BFD_TRANSPORT_UDP6 == transport) { ip6_main_t *im = &ip6_main; ip_interface_address_t *ia = NULL; /* *INDENT-OFF* */ foreach_ip_interface_address (&im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, 0 /* honor unnumbered */, ({ if (ia->address_length <= 127) { return 1; } })); /* *INDENT-ON* */ } } BFD_DBG ("No usable IP address for UDP echo - echo not available"); return 0; } static u16 bfd_udp_bs_idx_to_sport (u32 bs_idx) { /* The source port MUST be in the range 49152 through 65535. The same UDP * source port number MUST be used for all BFD Control packets associated * with a particular session. The source port number SHOULD be unique among * all BFD sessions on the system. If more than 16384 BFD sessions are * simultaneously active, UDP source port numbers MAY be reused on * multiple sessions, but the number of distinct uses of the same UDP * source port number SHOULD be minimized. */ return 49152 + bs_idx % (65535 - 49152 + 1); } int bfd_udp_get_echo_src_ip4 (ip4_address_t * addr) { if (!bfd_udp_main.echo_source_is_set) { BFD_ERR ("cannot find ip4 address, echo source not set"); return 0; } ip_interface_address_t *ia = NULL; ip4_main_t *im = &ip4_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, 0 /* honor unnumbered */, ({ ip4_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (ia->address_length <= 31) { addr->as_u32 = clib_host_to_net_u32 (x->as_u32); /* * flip the last bit to get a different address, might be network, * we don't care ... */ addr->as_u32 ^= 1; addr->as_u32 = clib_net_to_host_u32 (addr->as_u32); return 1; } })); /* *INDENT-ON* */ BFD_ERR ("cannot find ip4 address, no usable address found"); return 0; } int bfd_udp_get_echo_src_ip6 (ip6_address_t * addr) { if (!bfd_udp_main.echo_source_is_set) { BFD_ERR ("cannot find ip6 address, echo source not set"); return 0; } ip_interface_address_t *ia = NULL; ip6_main_t *im = &ip6_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, bfd_udp_main.echo_source_sw_if_index, 0 /* honor unnumbered */, ({ ip6_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (ia->address_length <= 127) { *addr = *x; addr->as_u8[15] ^= 1; /* flip the last bit of the address */ return 1; } })); /* *INDENT-ON* */ BFD_ERR ("cannot find ip6 address, no usable address found"); return 0; } void bfd_udp_get_echo_source (int *is_set, u32 * sw_if_index, int *have_usable_ip4, ip4_address_t * ip4, int *have_usable_ip6, ip6_address_t * ip6) { if (bfd_udp_main.echo_source_is_set) { *is_set = 1; *sw_if_index = bfd_udp_main.echo_source_sw_if_index; *have_usable_ip4 = bfd_udp_get_echo_src_ip4 (ip4); *have_usable_ip6 = bfd_udp_get_echo_src_ip6 (ip6); } else { *is_set = 0; } } int bfd_add_udp4_transport (vlib_main_t * vm, u32 bi, const bfd_session_t * bs, int is_echo) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; vlib_buffer_t *b = vlib_get_buffer (vm, bi); b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index; vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index; vnet_buffer (b)->sw_if_index[VLIB_RX] = 0; vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0; typedef struct { ip4_header_t ip4; udp_header_t udp; } ip4_udp_headers; ip4_udp_headers *headers = NULL; vlib_buffer_advance (b, -sizeof (*headers)); headers = vlib_buffer_get_current (b); clib_memset (headers, 0, sizeof (*headers)); headers->ip4.ip_version_and_header_length = 0x45; headers->ip4.ttl = 255; headers->ip4.protocol = IP_PROTOCOL_UDP; headers->udp.src_port = clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx)); if (is_echo) { int rv; if (!(rv = bfd_udp_get_echo_src_ip4 (&headers->ip4.src_address))) { return rv; } headers->ip4.dst_address.as_u32 = key->local_addr.ip4.as_u32; headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo4); } else { headers->ip4.src_address.as_u32 = key->local_addr.ip4.as_u32; headers->ip4.dst_address.as_u32 = key->peer_addr.ip4.as_u32; headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd4); } /* fix ip length, checksum and udp length */ const u16 ip_length = vlib_buffer_length_in_chain (vm, b); headers->ip4.length = clib_host_to_net_u16 (ip_length); headers->ip4.checksum = ip4_header_checksum (&headers->ip4); const u16 udp_length = ip_length - (sizeof (headers->ip4)); headers->udp.length = clib_host_to_net_u16 (udp_length); return 1; } int bfd_add_udp6_transport (vlib_main_t * vm, u32 bi, const bfd_session_t * bs, int is_echo) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; vlib_buffer_t *b = vlib_get_buffer (vm, bi); b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; vnet_buffer (b)->ip.adj_index[VLIB_RX] = bus->adj_index; vnet_buffer (b)->ip.adj_index[VLIB_TX] = bus->adj_index; vnet_buffer (b)->sw_if_index[VLIB_RX] = 0; vnet_buffer (b)->sw_if_index[VLIB_TX] = 0; typedef struct { ip6_header_t ip6; udp_header_t udp; } ip6_udp_headers; ip6_udp_headers *headers = NULL; vlib_buffer_advance (b, -sizeof (*headers)); headers = vlib_buffer_get_current (b); clib_memset (headers, 0, sizeof (*headers)); headers->ip6.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28); headers->ip6.hop_limit = 255; headers->ip6.protocol = IP_PROTOCOL_UDP; headers->udp.src_port = clib_host_to_net_u16 (bfd_udp_bs_idx_to_sport (bs->bs_idx)); if (is_echo) { int rv; if (!(rv = bfd_udp_get_echo_src_ip6 (&headers->ip6.src_address))) { return rv; } clib_memcpy_fast (&headers->ip6.dst_address, &key->local_addr.ip6, sizeof (headers->ip6.dst_address)); headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd_echo6); } else { clib_memcpy_fast (&headers->ip6.src_address, &key->local_addr.ip6, sizeof (headers->ip6.src_address)); clib_memcpy_fast (&headers->ip6.dst_address, &key->peer_addr.ip6, sizeof (headers->ip6.dst_address)); headers->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_bfd6); } /* fix ip payload length and udp length */ const u16 udp_length = vlib_buffer_length_in_chain (vm, b) - (sizeof (headers->ip6)); headers->udp.length = clib_host_to_net_u16 (udp_length); headers->ip6.payload_length = headers->udp.length; /* IPv6 UDP checksum is mandatory */ int bogus = 0; headers->udp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, &headers->ip6, &bogus); ASSERT (bogus == 0); if (headers->udp.checksum == 0) { headers->udp.checksum = 0xffff; } return 1; } static void bfd_create_frame_to_next_node (vlib_main_t * vm, u32 bi, u32 next_node) { vlib_frame_t *f = vlib_get_frame_to_node (vm, next_node); u32 *to_next = vlib_frame_vector_args (f); to_next[0] = bi; f->n_vectors = 1; vlib_put_frame_to_node (vm, next_node, f); } int bfd_udp_calc_next_node (const struct bfd_session_s *bs, u32 * next_node) { vnet_main_t *vnm = vnet_get_main (); const bfd_udp_session_t *bus = &bs->udp; ip_adjacency_t *adj = adj_get (bus->adj_index); /* don't try to send the buffer if the interface is not up */ if (!vnet_sw_interface_is_up (vnm, bus->key.sw_if_index)) return 0; switch (adj->lookup_next_index) { case IP_LOOKUP_NEXT_ARP: switch (bs->transport) { case BFD_TRANSPORT_UDP4: *next_node = bfd_udp_main.ip4_arp_idx; return 1; case BFD_TRANSPORT_UDP6: *next_node = bfd_udp_main.ip6_ndp_idx; return 1; } break; case IP_LOOKUP_NEXT_REWRITE: switch (bs->transport) { case BFD_TRANSPORT_UDP4: *next_node = bfd_udp_main.ip4_rewrite_idx; return 1; case BFD_TRANSPORT_UDP6: *next_node = bfd_udp_main.ip6_rewrite_idx; return 1; } break; case IP_LOOKUP_NEXT_MIDCHAIN: switch (bs->transport) { case BFD_TRANSPORT_UDP4: *next_node = bfd_udp_main.ip4_midchain_idx; return 1; case BFD_TRANSPORT_UDP6: *next_node = bfd_udp_main.ip6_midchain_idx; return 1; } break; default: /* drop */ break; } return 0; } int bfd_transport_udp4 (vlib_main_t * vm, u32 bi, const struct bfd_session_s *bs) { u32 next_node; int rv = bfd_udp_calc_next_node (bs, &next_node); if (rv) { bfd_create_frame_to_next_node (vm, bi, next_node); } return rv; } int bfd_transport_udp6 (vlib_main_t * vm, u32 bi, const struct bfd_session_s *bs) { u32 next_node; int rv = bfd_udp_calc_next_node (bs, &next_node); if (rv) { bfd_create_frame_to_next_node (vm, bi, next_node); } return 1; } static bfd_session_t * bfd_lookup_session (bfd_udp_main_t * bum, const bfd_udp_key_t * key) { uword *p = mhash_get (&bum->bfd_session_idx_by_bfd_key, key); if (p) { return bfd_find_session_by_idx (bum->bfd_main, *p); } return 0; } static void bfd_udp_key_init (bfd_udp_key_t * key, u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr) { clib_memset (key, 0, sizeof (*key)); key->sw_if_index = sw_if_index; key->local_addr.as_u64[0] = local_addr->as_u64[0]; key->local_addr.as_u64[1] = local_addr->as_u64[1]; key->peer_addr.as_u64[0] = peer_addr->as_u64[0]; key->peer_addr.as_u64[1] = peer_addr->as_u64[1]; } static vnet_api_error_t bfd_udp_add_session_internal (vlib_main_t * vm, bfd_udp_main_t * bum, u32 sw_if_index, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, bfd_session_t ** bs_out) { /* get a pool entry and if we end up not needing it, give it back */ bfd_transport_e t = BFD_TRANSPORT_UDP4; if (!ip46_address_is_ip4 (local_addr)) { t = BFD_TRANSPORT_UDP6; } bfd_session_t *bs = bfd_get_session (bum->bfd_main, t); if (!bs) { return VNET_API_ERROR_BFD_EAGAIN; } bfd_udp_session_t *bus = &bs->udp; clib_memset (bus, 0, sizeof (*bus)); bfd_udp_key_t *key = &bus->key; bfd_udp_key_init (key, sw_if_index, local_addr, peer_addr); const bfd_session_t *tmp = bfd_lookup_session (bum, key); if (tmp) { vlib_log_err (bum->log_class, "duplicate bfd-udp session, existing bs_idx=%d", tmp->bs_idx); bfd_put_session (bum->bfd_main, bs); return VNET_API_ERROR_BFD_EEXIST; } mhash_set (&bum->bfd_session_idx_by_bfd_key, key, bs->bs_idx, NULL); BFD_DBG ("session created, bs_idx=%u, sw_if_index=%d, local=%U, peer=%U", bs->bs_idx, key->sw_if_index, format_ip46_address, &key->local_addr, IP46_TYPE_ANY, format_ip46_address, &key->peer_addr, IP46_TYPE_ANY); vlib_log_info (bum->log_class, "create BFD session: %U", format_bfd_session, bs); if (BFD_TRANSPORT_UDP4 == t) { bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4, &key->peer_addr, key->sw_if_index); BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP4, VNET_LINK_IP4, %U, %d) " "returns %d", format_ip46_address, &key->peer_addr, IP46_TYPE_ANY, key->sw_if_index, bus->adj_index); ++bum->udp4_sessions_count; if (1 == bum->udp4_sessions_count) { udp_register_dst_port (vm, UDP_DST_PORT_bfd4, bfd_udp4_input_node.index, 1); udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo4, bfd_udp_echo4_input_node.index, 1); } } else { bus->adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &key->peer_addr, key->sw_if_index); BFD_DBG ("adj_nbr_add_or_lock(FIB_PROTOCOL_IP6, VNET_LINK_IP6, %U, %d) " "returns %d", format_ip46_address, &key->peer_addr, IP46_TYPE_ANY, key->sw_if_index, bus->adj_index); ++bum->udp6_sessions_count; if (1 == bum->udp6_sessions_count) { udp_register_dst_port (vm, UDP_DST_PORT_bfd6, bfd_udp6_input_node.index, 0); udp_register_dst_port (vm, UDP_DST_PORT_bfd_echo6, bfd_udp_echo6_input_node.index, 0); } } *bs_out = bs; return bfd_session_set_params (bum->bfd_main, bs, desired_min_tx_usec, required_min_rx_usec, detect_mult); } static vnet_api_error_t bfd_udp_validate_api_input (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr) { bfd_udp_main_t *bum = &bfd_udp_main; vnet_sw_interface_t *sw_if = vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, sw_if_index); u8 local_ip_valid = 0; ip_interface_address_t *ia = NULL; if (!sw_if) { vlib_log_err (bum->log_class, "got NULL sw_if when getting interface by index %u", sw_if_index); return VNET_API_ERROR_INVALID_SW_IF_INDEX; } if (ip46_address_is_ip4 (local_addr)) { if (!ip46_address_is_ip4 (peer_addr)) { vlib_log_err (bum->log_class, "IP family mismatch (local is ipv4, peer is ipv6)"); return VNET_API_ERROR_INVALID_ARGUMENT; } ip4_main_t *im = &ip4_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({ ip4_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (x->as_u32 == local_addr->ip4.as_u32) { /* valid address for this interface */ local_ip_valid = 1; break; } })); /* *INDENT-ON* */ } else { if (ip46_address_is_ip4 (peer_addr)) { vlib_log_err (bum->log_class, "IP family mismatch (local is ipv6, peer is ipv4)"); return VNET_API_ERROR_INVALID_ARGUMENT; } if (ip6_address_is_link_local_unicast (&local_addr->ip6)) { const ip6_address_t *ll_addr; ll_addr = ip6_get_link_local_address (sw_if_index); if (ip6_address_is_equal (ll_addr, &local_addr->ip6)) { /* valid address for this interface */ local_ip_valid = 1; } } else { ip6_main_t *im = &ip6_main; /* *INDENT-OFF* */ foreach_ip_interface_address ( &im->lookup_main, ia, sw_if_index, 0 /* honor unnumbered */, ({ ip6_address_t *x = ip_interface_address_get_address (&im->lookup_main, ia); if (local_addr->ip6.as_u64[0] == x->as_u64[0] && local_addr->ip6.as_u64[1] == x->as_u64[1]) { /* valid address for this interface */ local_ip_valid = 1; break; } })); /* *INDENT-ON* */ } } if (!local_ip_valid) { vlib_log_err (bum->log_class, "local address %U not found on interface with index %u", format_ip46_address, local_addr, IP46_TYPE_ANY, sw_if_index); return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE; } return 0; } static vnet_api_error_t bfd_udp_find_session_by_api_input (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, bfd_session_t ** bs_out) { vnet_api_error_t rv = bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr); if (!rv) { bfd_udp_main_t *bum = &bfd_udp_main; bfd_udp_key_t key; bfd_udp_key_init (&key, sw_if_index, local_addr, peer_addr); bfd_session_t *bs = bfd_lookup_session (bum, &key); if (bs) { *bs_out = bs; } else { vlib_log_err (bum->log_class, "BFD session not found, sw_if_index=%u, local=%U, peer=%U", sw_if_index, format_ip46_address, local_addr, IP46_TYPE_ANY, format_ip46_address, peer_addr, IP46_TYPE_ANY); return VNET_API_ERROR_BFD_ENOENT; } } return rv; } static vnet_api_error_t bfd_api_verify_common (u32 sw_if_index, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, const ip46_address_t * local_addr, const ip46_address_t * peer_addr) { bfd_udp_main_t *bum = &bfd_udp_main; vnet_api_error_t rv = bfd_udp_validate_api_input (sw_if_index, local_addr, peer_addr); if (rv) { return rv; } if (detect_mult < 1) { vlib_log_err (bum->log_class, "detect_mult < 1"); return VNET_API_ERROR_INVALID_ARGUMENT; } if (desired_min_tx_usec < 1) { vlib_log_err (bum->log_class, "desired_min_tx_usec < 1"); return VNET_API_ERROR_INVALID_ARGUMENT; } return 0; } static void bfd_udp_del_session_internal (vlib_main_t * vm, bfd_session_t * bs) { bfd_udp_main_t *bum = &bfd_udp_main; BFD_DBG ("free bfd-udp session, bs_idx=%d", bs->bs_idx); mhash_unset (&bum->bfd_session_idx_by_bfd_key, &bs->udp.key, NULL); adj_unlock (bs->udp.adj_index); switch (bs->transport) { case BFD_TRANSPORT_UDP4: --bum->udp4_sessions_count; if (!bum->udp4_sessions_count) { udp_unregister_dst_port (vm, UDP_DST_PORT_bfd4, 1); udp_unregister_dst_port (vm, UDP_DST_PORT_bfd_echo4, 1); } break; case BFD_TRANSPORT_UDP6: --bum->udp6_sessions_count; if (!bum->udp6_sessions_count) { udp_unregister_dst_port (vm, UDP_DST_PORT_bfd6, 0); udp_unregister_dst_port (vm, UDP_DST_PORT_bfd_echo6, 0); } break; } bfd_put_session (bum->bfd_main, bs); } vnet_api_error_t bfd_udp_add_session (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult, u8 is_authenticated, u32 conf_key_id, u8 bfd_key_id) { bfd_main_t *bm = &bfd_main; bfd_lock (bm); vnet_api_error_t rv = bfd_api_verify_common (sw_if_index, desired_min_tx_usec, required_min_rx_usec, detect_mult, local_addr, peer_addr); bfd_session_t *bs = NULL; if (!rv) { rv = bfd_udp_add_session_internal (vlib_get_main (), &bfd_udp_main, sw_if_index, desired_min_tx_usec, required_min_rx_usec, detect_mult, local_addr, peer_addr, &bs); } if (!rv && is_authenticated) { #if WITH_LIBSSL > 0 rv = bfd_auth_activate (bs, conf_key_id, bfd_key_id, 0 /* is not delayed */ ); #else vlib_log_err (bfd_udp_main.log_class, "SSL missing, cannot add authenticated BFD session"); rv = VNET_API_ERROR_BFD_NOTSUPP; #endif if (rv) { bfd_udp_del_session_internal (vlib_get_main (), bs); } } if (!rv) { bfd_session_start (bfd_udp_main.bfd_main, bs); } bfd_unlock (bm); return rv; } vnet_api_error_t bfd_udp_mod_session (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, u32 desired_min_tx_usec, u32 required_min_rx_usec, u8 detect_mult) { bfd_session_t *bs = NULL; bfd_main_t *bm = &bfd_main; vnet_api_error_t error; bfd_lock (bm); vnet_api_error_t rv = bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr, &bs); if (rv) { bfd_unlock (bm); return rv; } error = bfd_session_set_params (bfd_udp_main.bfd_main, bs, desired_min_tx_usec, required_min_rx_usec, detect_mult); bfd_unlock (bm); return error; } vnet_api_error_t bfd_udp_del_session (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr) { bfd_session_t *bs = NULL; bfd_main_t *bm = &bfd_main; bfd_lock (bm); vnet_api_error_t rv = bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr, &bs); if (rv) { bfd_unlock (bm); return rv; } bfd_udp_del_session_internal (vlib_get_main (), bs); bfd_unlock (bm); return 0; } vnet_api_error_t bfd_udp_session_set_flags (vlib_main_t * vm, u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, u8 admin_up_down) { bfd_session_t *bs = NULL; bfd_main_t *bm = &bfd_main; bfd_lock (bm); vnet_api_error_t rv = bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr, &bs); if (rv) { bfd_unlock (bm); return rv; } bfd_session_set_flags (vm, bs, admin_up_down); bfd_unlock (bm); return 0; } vnet_api_error_t bfd_udp_auth_activate (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, u32 conf_key_id, u8 key_id, u8 is_delayed) { bfd_main_t *bm = &bfd_main; bfd_lock (bm); vnet_api_error_t error; #if WITH_LIBSSL > 0 bfd_session_t *bs = NULL; vnet_api_error_t rv = bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr, &bs); if (rv) { bfd_unlock (bm); return rv; } error = bfd_auth_activate (bs, conf_key_id, key_id, is_delayed); bfd_unlock (bm); return error; #else vlib_log_err (bfd_udp_main->log_class, "SSL missing, cannot activate BFD authentication"); bfd_unlock (bm); return VNET_API_ERROR_BFD_NOTSUPP; #endif } vnet_api_error_t bfd_udp_auth_deactivate (u32 sw_if_index, const ip46_address_t * local_addr, const ip46_address_t * peer_addr, u8 is_delayed) { bfd_main_t *bm = &bfd_main; vnet_api_error_t error; bfd_lock (bm); bfd_session_t *bs = NULL; vnet_api_error_t rv = bfd_udp_find_session_by_api_input (sw_if_index, local_addr, peer_addr, &bs); if (rv) { bfd_unlock (bm); return rv; } error = bfd_auth_deactivate (bs, is_delayed); bfd_unlock (bm); return error; } typedef enum { BFD_UDP_INPUT_NEXT_NORMAL, BFD_UDP_INPUT_NEXT_REPLY_ARP, BFD_UDP_INPUT_NEXT_REPLY_REWRITE, BFD_UDP_INPUT_NEXT_REPLY_MIDCHAIN, BFD_UDP_INPUT_N_NEXT, } bfd_udp_input_next_t; /* Packet counters - BFD control frames */ #define foreach_bfd_udp_error(F) \ F (NONE, "good bfd packets (processed)") \ F (BAD, "invalid bfd packets") #define F(sym, string) static char BFD_UDP_ERR_##sym##_STR[] = string; foreach_bfd_udp_error (F); #undef F static char *bfd_udp_error_strings[] = { #define F(sym, string) BFD_UDP_ERR_##sym##_STR, foreach_bfd_udp_error (F) #undef F }; typedef enum { #define F(sym, str) BFD_UDP_ERROR_##sym, foreach_bfd_udp_error (F) #undef F BFD_UDP_N_ERROR, } bfd_udp_error_t; typedef enum { BFD_UDP_ECHO_INPUT_NEXT_NORMAL, BFD_UDP_ECHO_INPUT_NEXT_REPLY_ARP, BFD_UDP_ECHO_INPUT_NEXT_REPLY_REWRITE, BFD_UDP_ECHO_INPUT_N_NEXT, } bfd_udp_echo_input_next_t; /* Packet counters - BFD ECHO packets */ #define foreach_bfd_udp_echo_error(F) \ F (NONE, "good bfd echo packets (processed)") \ F (BAD, "invalid bfd echo packets") #define F(sym, string) static char BFD_UDP_ECHO_ERR_##sym##_STR[] = string; foreach_bfd_udp_echo_error (F); #undef F static char *bfd_udp_echo_error_strings[] = { #define F(sym, string) BFD_UDP_ECHO_ERR_##sym##_STR, foreach_bfd_udp_echo_error (F) #undef F }; typedef enum { #define F(sym, str) BFD_UDP_ECHO_ERROR_##sym, foreach_bfd_udp_echo_error (F) #undef F BFD_UDP_ECHO_N_ERROR, } bfd_udp_echo_error_t; static void bfd_udp4_find_headers (vlib_buffer_t * b, ip4_header_t ** ip4, udp_header_t ** udp) { /* sanity check first */ const i32 start = vnet_buffer (b)->l3_hdr_offset; if (start < 0 && start < sizeof (b->pre_data)) { BFD_ERR ("Start of ip header is before pre_data, ignoring"); *ip4 = NULL; *udp = NULL; return; } *ip4 = (ip4_header_t *) (b->data + start); if ((u8 *) * ip4 > (u8 *) vlib_buffer_get_current (b)) { BFD_ERR ("Start of ip header is beyond current data, ignoring"); *ip4 = NULL; *udp = NULL; return; } *udp = (udp_header_t *) ((*ip4) + 1); } static bfd_udp_error_t bfd_udp4_verify_transport (const ip4_header_t * ip4, const udp_header_t * udp, const bfd_session_t * bs) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; if (ip4->src_address.as_u32 != key->peer_addr.ip4.as_u32) { BFD_ERR ("IPv4 src addr mismatch, got %U, expected %U", format_ip4_address, ip4->src_address.as_u8, format_ip4_address, key->peer_addr.ip4.as_u8); return BFD_UDP_ERROR_BAD; } if (ip4->dst_address.as_u32 != key->local_addr.ip4.as_u32) { BFD_ERR ("IPv4 dst addr mismatch, got %U, expected %U", format_ip4_address, ip4->dst_address.as_u8, format_ip4_address, key->local_addr.ip4.as_u8); return BFD_UDP_ERROR_BAD; } const u8 expected_ttl = 255; if (ip4->ttl != expected_ttl) { BFD_ERR ("IPv4 unexpected TTL value %u, expected %u", ip4->ttl, expected_ttl); return BFD_UDP_ERROR_BAD; } if (clib_net_to_host_u16 (udp->src_port) < 49152) { BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>", udp->src_port); } return BFD_UDP_ERROR_NONE; } typedef struct { u32 bs_idx; bfd_pkt_t pkt; } bfd_rpc_update_t; static void bfd_rpc_update_session (vlib_main_t * vm, u32 bs_idx, const bfd_pkt_t * pkt) { bfd_main_t *bm = &bfd_main; bfd_lock (bm); bfd_consume_pkt (vm, bm, pkt, bs_idx); bfd_unlock (bm); } static bfd_udp_error_t bfd_udp4_scan (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_buffer_t * b, bfd_session_t ** bs_out) { const bfd_pkt_t *pkt = vlib_buffer_get_current (b); if (sizeof (*pkt) > b->current_length) { BFD_ERR ("Payload size %d too small to hold bfd packet of minimum size %d", b->current_length, sizeof (*pkt)); return BFD_UDP_ERROR_BAD; } ip4_header_t *ip4; udp_header_t *udp; bfd_udp4_find_headers (b, &ip4, &udp); if (!ip4 || !udp) { BFD_ERR ("Couldn't find ip4 or udp header"); return BFD_UDP_ERROR_BAD; } const u32 udp_payload_length = udp->length - sizeof (*udp); if (pkt->head.length > udp_payload_length) { BFD_ERR ("BFD packet length is larger than udp payload length (%u > %u)", pkt->head.length, udp_payload_length); return BFD_UDP_ERROR_BAD; } if (!bfd_verify_pkt_common (pkt)) { return BFD_UDP_ERROR_BAD; } bfd_session_t *bs = NULL; if (pkt->your_disc) { BFD_DBG ("Looking up BFD session using discriminator %u", pkt->your_disc); bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc); } else { bfd_udp_key_t key; clib_memset (&key, 0, sizeof (key)); key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; key.local_addr.ip4.as_u32 = ip4->dst_address.as_u32; key.peer_addr.ip4.as_u32 = ip4->src_address.as_u32; BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, " "peer=%U)", key.sw_if_index, format_ip4_address, key.local_addr.ip4.as_u8, format_ip4_address, key.peer_addr.ip4.as_u8); bs = bfd_lookup_session (&bfd_udp_main, &key); } if (!bs) { BFD_ERR ("BFD session lookup failed - no session matches BFD pkt"); return BFD_UDP_ERROR_BAD; } BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx); if (!bfd_verify_pkt_auth (vm, pkt, b->current_length, bs)) { BFD_ERR ("Packet verification failed, dropping packet"); return BFD_UDP_ERROR_BAD; } bfd_udp_error_t err; if (BFD_UDP_ERROR_NONE != (err = bfd_udp4_verify_transport (ip4, udp, bs))) { return err; } bfd_rpc_update_session (vm, bs->bs_idx, pkt); *bs_out = bs; return BFD_UDP_ERROR_NONE; } static void bfd_udp6_find_headers (vlib_buffer_t * b, ip6_header_t ** ip6, udp_header_t ** udp) { /* sanity check first */ const i32 start = vnet_buffer (b)->l3_hdr_offset; if (start < 0 && start < sizeof (b->pre_data)) { BFD_ERR ("Start of ip header is before pre_data, ignoring"); *ip6 = NULL; *udp = NULL; return; } *ip6 = (ip6_header_t *) (b->data + start); if ((u8 *) * ip6 > (u8 *) vlib_buffer_get_current (b)) { BFD_ERR ("Start of ip header is beyond current data, ignoring"); *ip6 = NULL; *udp = NULL; return; } if ((*ip6)->protocol != IP_PROTOCOL_UDP) { BFD_ERR ("Unexpected protocol in IPv6 header '%u', expected '%u' (== " "IP_PROTOCOL_UDP)", (*ip6)->protocol, IP_PROTOCOL_UDP); *ip6 = NULL; *udp = NULL; return; } *udp = (udp_header_t *) ((*ip6) + 1); } static bfd_udp_error_t bfd_udp6_verify_transport (const ip6_header_t * ip6, const udp_header_t * udp, const bfd_session_t * bs) { const bfd_udp_session_t *bus = &bs->udp; const bfd_udp_key_t *key = &bus->key; if (ip6->src_address.as_u64[0] != key->peer_addr.ip6.as_u64[0] && ip6->src_address.as_u64[1] != key->peer_addr.ip6.as_u64[1]) { BFD_ERR ("IP src addr mismatch, got %U, expected %U", format_ip6_address, ip6, format_ip6_address, &key->peer_addr.ip6); return BFD_UDP_ERROR_BAD; } if (ip6->dst_address.as_u64[0] != key->local_addr.ip6.as_u64[0] && ip6->dst_address.as_u64[1] != key->local_addr.ip6.as_u64[1]) { BFD_ERR ("IP dst addr mismatch, got %U, expected %U", format_ip6_address, ip6, format_ip6_address, &key->local_addr.ip6); return BFD_UDP_ERROR_BAD; } const u8 expected_hop_limit = 255; if (ip6->hop_limit != expected_hop_limit) { BFD_ERR ("IPv6 unexpected hop-limit value %u, expected %u", ip6->hop_limit, expected_hop_limit); return BFD_UDP_ERROR_BAD; } if (clib_net_to_host_u16 (udp->src_port) < 49152) { BFD_ERR ("Invalid UDP src port %u, out of range <49152,65535>", udp->src_port); } return BFD_UDP_ERROR_NONE; } static bfd_udp_error_t bfd_udp6_scan (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_buffer_t * b, bfd_session_t ** bs_out) { const bfd_pkt_t *pkt = vlib_buffer_get_current (b); if (sizeof (*pkt) > b->current_length) { BFD_ERR ("Payload size %d too small to hold bfd packet of minimum size %d", b->current_length, sizeof (*pkt)); return BFD_UDP_ERROR_BAD; } ip6_header_t *ip6; udp_header_t *udp; bfd_udp6_find_headers (b, &ip6, &udp); if (!ip6 || !udp) { BFD_ERR ("Couldn't find ip6 or udp header"); return BFD_UDP_ERROR_BAD; } const u32 udp_payload_length = udp->length - sizeof (*udp); if (pkt->head.length > udp_payload_length) { BFD_ERR ("BFD packet length is larger than udp payload length (%u > %u)", pkt->head.length, udp_payload_length); return BFD_UDP_ERROR_BAD; } if (!bfd_verify_pkt_common (pkt)) { return BFD_UDP_ERROR_BAD; } bfd_session_t *bs = NULL; if (pkt->your_disc) { BFD_DBG ("Looking up BFD session using discriminator %u", pkt->your_disc); bs = bfd_find_session_by_disc (bfd_udp_main.bfd_main, pkt->your_disc); } else { bfd_udp_key_t key; clib_memset (&key, 0, sizeof (key)); key.sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; key.local_addr.ip6.as_u64[0] = ip6->dst_address.as_u64[0]; key.local_addr.ip6.as_u64[1] = ip6->dst_address.as_u64[1]; key.peer_addr.ip6.as_u64[0] = ip6->src_address.as_u64[0]; key.peer_addr.ip6.as_u64[1] = ip6->src_address.as_u64[1]; BFD_DBG ("Looking up BFD session using key (sw_if_index=%u, local=%U, " "peer=%U)", key.sw_if_index, format_ip6_address, &key.local_addr, format_ip6_address, &key.peer_addr); bs = bfd_lookup_session (&bfd_udp_main, &key); } if (!bs) { BFD_ERR ("BFD session lookup failed - no session matches BFD pkt"); return BFD_UDP_ERROR_BAD; } BFD_DBG ("BFD session found, bs_idx=%u", bs->bs_idx); if (!bfd_verify_pkt_auth (vm, pkt, b->current_length, bs)) { BFD_ERR ("Packet verification failed, dropping packet"); return BFD_UDP_ERROR_BAD; } bfd_udp_error_t err; if (BFD_UDP_ERROR_NONE != (err = bfd_udp6_verify_transport (ip6, udp, bs))) { return err; } bfd_rpc_update_session (vm, bs->bs_idx, pkt); *bs_out = bs; return BFD_UDP_ERROR_NONE; } /* * Process a frame of bfd packets * Expect 1 packet / frame */ static uword bfd_udp_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f, int is_ipv6) { u32 n_left_from, *from; bfd_input_trace_t *t0; bfd_main_t *bm = &bfd_main; from = vlib_frame_vector_args (f); /* array of buffer indices */ n_left_from = f->n_vectors; /* number of buffer indices */ while (n_left_from > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0, error0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); bfd_session_t *bs = NULL; /* If this pkt is traced, snapshot the data */ if (b0->flags & VLIB_BUFFER_IS_TRACED) { int len; t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0)); len = (b0->current_length < sizeof (t0->data)) ? b0->current_length : sizeof (t0->data); t0->len = len; clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), len); } /* scan this bfd pkt. error0 is the counter index to bmp */ bfd_lock (bm); if (is_ipv6) { error0 = bfd_udp6_scan (vm, rt, b0, &bs); } else { error0 = bfd_udp4_scan (vm, rt, b0, &bs); } b0->error = rt->errors[error0]; next0 = BFD_UDP_INPUT_NEXT_NORMAL; if (BFD_UDP_ERROR_NONE == error0) { /* * if everything went fine, check for poll bit, if present, re-use * the buffer and based on (now updated) session parameters, send * the final packet back */ const bfd_pkt_t *pkt = vlib_buffer_get_current (b0); if (bfd_pkt_get_poll (pkt)) { b0->current_data = 0; b0->current_length = 0; bfd_init_final_control_frame (vm, b0, bfd_udp_main.bfd_main, bs, 0); if (is_ipv6) { vlib_node_increment_counter (vm, bfd_udp6_input_node.index, b0->error, 1); } else { vlib_node_increment_counter (vm, bfd_udp4_input_node.index, b0->error, 1); } const bfd_udp_session_t *bus = &bs->udp; ip_adjacency_t *adj = adj_get (bus->adj_index); switch (adj->lookup_next_index) { case IP_LOOKUP_NEXT_ARP: next0 = BFD_UDP_INPUT_NEXT_REPLY_ARP; break; case IP_LOOKUP_NEXT_REWRITE: next0 = BFD_UDP_INPUT_NEXT_REPLY_REWRITE; break; case IP_LOOKUP_NEXT_MIDCHAIN: next0 = BFD_UDP_INPUT_NEXT_REPLY_MIDCHAIN; break; default: /* drop */ break; } } } bfd_unlock (bm); vlib_set_next_frame_buffer (vm, rt, next0, bi0); from += 1; n_left_from -= 1; } return f->n_vectors; } static uword bfd_udp4_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { return bfd_udp_input (vm, rt, f, 0); } /* * bfd input graph node declaration */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp4_input_node, static) = { .function = bfd_udp4_input, .name = "bfd-udp4-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_N_ERROR, .error_strings = bfd_udp_error_strings, .format_trace = bfd_input_format_trace, .n_next_nodes = BFD_UDP_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip4-arp", [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup", [BFD_UDP_INPUT_NEXT_REPLY_MIDCHAIN] = "ip4-midchain", }, }; /* *INDENT-ON* */ static uword bfd_udp6_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { return bfd_udp_input (vm, rt, f, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp6_input_node, static) = { .function = bfd_udp6_input, .name = "bfd-udp6-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_N_ERROR, .error_strings = bfd_udp_error_strings, .format_trace = bfd_input_format_trace, .n_next_nodes = BFD_UDP_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor", [BFD_UDP_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup", [BFD_UDP_INPUT_NEXT_REPLY_MIDCHAIN] = "ip6-midchain", }, }; /* *INDENT-ON* */ /* * Process a frame of bfd echo packets * Expect 1 packet / frame */ static uword bfd_udp_echo_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f, int is_ipv6) { u32 n_left_from, *from; bfd_input_trace_t *t0; bfd_main_t *bm = &bfd_main; from = vlib_frame_vector_args (f); /* array of buffer indices */ n_left_from = f->n_vectors; /* number of buffer indices */ while (n_left_from > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); /* If this pkt is traced, snapshot the data */ if (b0->flags & VLIB_BUFFER_IS_TRACED) { int len; t0 = vlib_add_trace (vm, rt, b0, sizeof (*t0)); len = (b0->current_length < sizeof (t0->data)) ? b0->current_length : sizeof (t0->data); t0->len = len; clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), len); } bfd_lock (bm); if (bfd_consume_echo_pkt (vm, bfd_udp_main.bfd_main, b0)) { b0->error = rt->errors[BFD_UDP_ERROR_NONE]; next0 = BFD_UDP_ECHO_INPUT_NEXT_NORMAL; } else { /* loop back the packet */ b0->error = rt->errors[BFD_UDP_ERROR_NONE]; if (is_ipv6) { vlib_node_increment_counter (vm, bfd_udp_echo6_input_node.index, b0->error, 1); } else { vlib_node_increment_counter (vm, bfd_udp_echo4_input_node.index, b0->error, 1); } next0 = BFD_UDP_ECHO_INPUT_NEXT_REPLY_REWRITE; } bfd_unlock (bm); vlib_set_next_frame_buffer (vm, rt, next0, bi0); from += 1; n_left_from -= 1; } return f->n_vectors; } static uword bfd_udp_echo4_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { return bfd_udp_echo_input (vm, rt, f, 0); } u8 * bfd_echo_input_format_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 *); const bfd_udp_echo_input_trace_t *t = va_arg (*args, bfd_udp_echo_input_trace_t *); if (t->len > STRUCT_SIZE_OF (bfd_pkt_t, head)) { s = format (s, "BFD ECHO:\n"); s = format (s, " data: %U", format_hexdump, t->data, t->len); } return s; } /* * bfd input graph node declaration */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp_echo4_input_node, static) = { .function = bfd_udp_echo4_input, .name = "bfd-udp-echo4-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_ECHO_N_ERROR, .error_strings = bfd_udp_error_strings, .format_trace = bfd_echo_input_format_trace, .n_next_nodes = BFD_UDP_ECHO_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_ECHO_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_ECHO_INPUT_NEXT_REPLY_ARP] = "ip4-arp", [BFD_UDP_ECHO_INPUT_NEXT_REPLY_REWRITE] = "ip4-lookup", }, }; /* *INDENT-ON* */ static uword bfd_udp_echo6_input (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { return bfd_udp_echo_input (vm, rt, f, 1); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (bfd_udp_echo6_input_node, static) = { .function = bfd_udp_echo6_input, .name = "bfd-udp-echo6-input", .vector_size = sizeof (u32), .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = BFD_UDP_ECHO_N_ERROR, .error_strings = bfd_udp_echo_error_strings, .format_trace = bfd_echo_input_format_trace, .n_next_nodes = BFD_UDP_ECHO_INPUT_N_NEXT, .next_nodes = { [BFD_UDP_ECHO_INPUT_NEXT_NORMAL] = "error-drop", [BFD_UDP_ECHO_INPUT_NEXT_REPLY_ARP] = "ip6-discover-neighbor", [BFD_UDP_ECHO_INPUT_NEXT_REPLY_REWRITE] = "ip6-lookup", }, }; /* *INDENT-ON* */ static clib_error_t * bfd_udp_sw_if_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_create) { bfd_session_t **to_be_freed = NULL; bfd_udp_main_t *bum = &bfd_udp_main; BFD_DBG ("sw_if_add_del called, sw_if_index=%u, is_create=%u", sw_if_index, is_create); if (!is_create) { bfd_session_t *bs; pool_foreach (bs, bfd_udp_main.bfd_main->sessions) { if (bs->transport != BFD_TRANSPORT_UDP4 && bs->transport != BFD_TRANSPORT_UDP6) { continue; } if (bs->udp.key.sw_if_index != sw_if_index) { continue; } vec_add1 (to_be_freed, bs); } } bfd_session_t **bs; vec_foreach (bs, to_be_freed) { vlib_log_notice (bum->log_class, "removal of sw_if_index=%u forces removal of bfd session " "with bs_idx=%u", sw_if_index, (*bs)->bs_idx); bfd_session_set_flags (vlib_get_main (), *bs, 0); bfd_udp_del_session_internal (vlib_get_main (), *bs); } return 0; } VNET_SW_INTERFACE_ADD_DEL_FUNCTION (bfd_udp_sw_if_add_del); /* * setup function */ static clib_error_t * bfd_udp_init (vlib_main_t * vm) { bfd_udp_main.udp4_sessions_count = 0; bfd_udp_main.udp6_sessions_count = 0; mhash_init (&bfd_udp_main.bfd_session_idx_by_bfd_key, sizeof (uword), sizeof (bfd_udp_key_t)); bfd_udp_main.bfd_main = &bfd_main; bfd_udp_main.vnet_main = vnet_get_main (); vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip4-arp"); ASSERT (node); bfd_udp_main.ip4_arp_idx = node->index; node = vlib_get_node_by_name (vm, (u8 *) "ip6-discover-neighbor"); ASSERT (node); bfd_udp_main.ip6_ndp_idx = node->index; node = vlib_get_node_by_name (vm, (u8 *) "ip4-rewrite"); ASSERT (node); bfd_udp_main.ip4_rewrite_idx = node->index; node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite"); ASSERT (node); bfd_udp_main.ip6_rewrite_idx = node->index; node = vlib_get_node_by_name (vm, (u8 *) "ip4-midchain"); ASSERT (node); bfd_udp_main.ip4_midchain_idx = node->index; node = vlib_get_node_by_name (vm, (u8 *) "ip6-midchain"); ASSERT (node); bfd_udp_main.ip6_midchain_idx = node->index; bfd_udp_main.log_class = vlib_log_register_class ("bfd", "udp"); vlib_log_debug (bfd_udp_main.log_class, "initialized"); return 0; } VLIB_INIT_FUNCTION (bfd_udp_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */