diff options
Diffstat (limited to 'src/vnet/mpls/mpls_api.c')
| -rw-r--r-- | src/vnet/mpls/mpls_api.c | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/src/vnet/mpls/mpls_api.c b/src/vnet/mpls/mpls_api.c new file mode 100644 index 00000000..762c40ff --- /dev/null +++ b/src/vnet/mpls/mpls_api.c @@ -0,0 +1,582 @@ +/* + *------------------------------------------------------------------ + * mpls_api.c - mpls api + * + * Copyright (c) 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. + *------------------------------------------------------------------ + */ + +#include <vnet/vnet.h> +#include <vlibmemory/api.h> + +#include <vnet/interface.h> +#include <vnet/api_errno.h> +#include <vnet/mpls/mpls.h> +#include <vnet/mpls/mpls_tunnel.h> +#include <vnet/fib/fib_table.h> +#include <vnet/fib/fib_api.h> +#include <vnet/fib/mpls_fib.h> +#include <vnet/fib/fib_path_list.h> + +#include <vnet/vnet_msg_enum.h> + +#define vl_typedefs /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_typedefs + +#define vl_endianfun /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include <vnet/vnet_all_api_h.h> +#undef vl_printfun + +#include <vlibapi/api_helper_macros.h> + +#define foreach_vpe_api_msg \ +_(MPLS_IP_BIND_UNBIND, mpls_ip_bind_unbind) \ +_(MPLS_ROUTE_ADD_DEL, mpls_route_add_del) \ +_(MPLS_TABLE_ADD_DEL, mpls_table_add_del) \ +_(MPLS_TUNNEL_ADD_DEL, mpls_tunnel_add_del) \ +_(MPLS_TUNNEL_DUMP, mpls_tunnel_dump) \ +_(MPLS_FIB_DUMP, mpls_fib_dump) + +extern void stats_dslock_with_hint (int hint, int tag); +extern void stats_dsunlock (void); + +void +mpls_table_delete (u32 table_id, u8 is_api) +{ + u32 fib_index; + + /* + * The MPLS defult table must also be explicitly created via the API. + * So in contrast to IP, it gets no special treatment here. + * + * The API holds only one lock on the table. + * i.e. it can be added many times via the API but needs to be + * deleted only once. + */ + fib_index = fib_table_find (FIB_PROTOCOL_MPLS, table_id); + + if (~0 != fib_index) + { + fib_table_unlock (fib_index, + FIB_PROTOCOL_MPLS, + (is_api ? FIB_SOURCE_API : FIB_SOURCE_CLI)); + } +} + +void +vl_api_mpls_table_add_del_t_handler (vl_api_mpls_table_add_del_t * mp) +{ + vl_api_mpls_table_add_del_reply_t *rmp; + vnet_main_t *vnm; + int rv = 0; + + vnm = vnet_get_main (); + vnm->api_errno = 0; + + if (mp->mt_is_add) + mpls_table_create (ntohl (mp->mt_table_id), 1, mp->mt_name); + else + mpls_table_delete (ntohl (mp->mt_table_id), 1); + + // NB: Nothing sets rv; none of the above returns an error + + REPLY_MACRO (VL_API_MPLS_TABLE_ADD_DEL_REPLY); +} + +static int +mpls_ip_bind_unbind_handler (vnet_main_t * vnm, + vl_api_mpls_ip_bind_unbind_t * mp) +{ + u32 mpls_fib_index, ip_fib_index; + + mpls_fib_index = + fib_table_find (FIB_PROTOCOL_MPLS, ntohl (mp->mb_mpls_table_id)); + + if (~0 == mpls_fib_index) + { + return VNET_API_ERROR_NO_SUCH_FIB; + } + + ip_fib_index = fib_table_find ((mp->mb_is_ip4 ? + FIB_PROTOCOL_IP4 : + FIB_PROTOCOL_IP6), + ntohl (mp->mb_ip_table_id)); + if (~0 == ip_fib_index) + return VNET_API_ERROR_NO_SUCH_FIB; + + fib_prefix_t pfx = { + .fp_len = mp->mb_address_length, + }; + + if (mp->mb_is_ip4) + { + pfx.fp_proto = FIB_PROTOCOL_IP4; + clib_memcpy (&pfx.fp_addr.ip4, mp->mb_address, + sizeof (pfx.fp_addr.ip4)); + } + else + { + pfx.fp_proto = FIB_PROTOCOL_IP6; + clib_memcpy (&pfx.fp_addr.ip6, mp->mb_address, + sizeof (pfx.fp_addr.ip6)); + } + + if (mp->mb_is_bind) + fib_table_entry_local_label_add (ip_fib_index, &pfx, + ntohl (mp->mb_label)); + else + fib_table_entry_local_label_remove (ip_fib_index, &pfx, + ntohl (mp->mb_label)); + + return (0); +} + +void +vl_api_mpls_ip_bind_unbind_t_handler (vl_api_mpls_ip_bind_unbind_t * mp) +{ + vl_api_mpls_ip_bind_unbind_reply_t *rmp; + vnet_main_t *vnm; + int rv; + + vnm = vnet_get_main (); + vnm->api_errno = 0; + + rv = mpls_ip_bind_unbind_handler (vnm, mp); + rv = (rv == 0) ? vnm->api_errno : rv; + + REPLY_MACRO (VL_API_MPLS_IP_BIND_UNBIND_REPLY); +} + +static int +mpls_route_add_del_t_handler (vnet_main_t * vnm, + vl_api_mpls_route_add_del_t * mp) +{ + u32 fib_index, next_hop_fib_index; + mpls_label_t *label_stack = NULL; + int rv, ii, n_labels;; + + fib_prefix_t pfx = { + .fp_len = 21, + .fp_proto = FIB_PROTOCOL_MPLS, + .fp_eos = mp->mr_eos, + .fp_label = ntohl (mp->mr_label), + }; + if (pfx.fp_eos) + { + pfx.fp_payload_proto = mp->mr_next_hop_proto; + } + else + { + pfx.fp_payload_proto = DPO_PROTO_MPLS; + } + + rv = add_del_route_check (FIB_PROTOCOL_MPLS, + mp->mr_table_id, + mp->mr_next_hop_sw_if_index, + pfx.fp_payload_proto, + mp->mr_next_hop_table_id, + mp->mr_is_rpf_id, + &fib_index, &next_hop_fib_index); + + if (0 != rv) + return (rv); + + ip46_address_t nh; + memset (&nh, 0, sizeof (nh)); + + if (DPO_PROTO_IP4 == mp->mr_next_hop_proto) + memcpy (&nh.ip4, mp->mr_next_hop, sizeof (nh.ip4)); + else if (DPO_PROTO_IP6 == mp->mr_next_hop_proto) + memcpy (&nh.ip6, mp->mr_next_hop, sizeof (nh.ip6)); + + n_labels = mp->mr_next_hop_n_out_labels; + if (n_labels == 0) + ; + else if (1 == n_labels) + vec_add1 (label_stack, ntohl (mp->mr_next_hop_out_label_stack[0])); + else + { + vec_validate (label_stack, n_labels - 1); + for (ii = 0; ii < n_labels; ii++) + label_stack[ii] = ntohl (mp->mr_next_hop_out_label_stack[ii]); + } + + return (add_del_route_t_handler (mp->mr_is_multipath, mp->mr_is_add, 0, // mp->is_drop, + 0, // mp->is_unreach, + 0, // mp->is_prohibit, + 0, // mp->is_local, + mp->mr_is_multicast, + mp->mr_is_classify, + mp->mr_classify_table_index, + mp->mr_is_resolve_host, + mp->mr_is_resolve_attached, + mp->mr_is_interface_rx, + mp->mr_is_rpf_id, + fib_index, &pfx, + mp->mr_next_hop_proto, + &nh, ntohl (mp->mr_next_hop_sw_if_index), + next_hop_fib_index, + mp->mr_next_hop_weight, + mp->mr_next_hop_preference, + ntohl (mp->mr_next_hop_via_label), + label_stack)); +} + +void +vl_api_mpls_route_add_del_t_handler (vl_api_mpls_route_add_del_t * mp) +{ + vl_api_mpls_route_add_del_reply_t *rmp; + vnet_main_t *vnm; + int rv; + + vnm = vnet_get_main (); + vnm->api_errno = 0; + + rv = mpls_route_add_del_t_handler (vnm, mp); + + rv = (rv == 0) ? vnm->api_errno : rv; + + REPLY_MACRO (VL_API_MPLS_ROUTE_ADD_DEL_REPLY); +} + +void +mpls_table_create (u32 table_id, u8 is_api, const u8 * name) +{ + u32 fib_index; + + /* + * The MPLS defult table must also be explicitly created via the API. + * So in contrast to IP, it gets no special treatment here. + */ + + /* + * The API holds only one lock on the table. + * i.e. it can be added many times via the API but needs to be + * deleted only once. + */ + fib_index = fib_table_find (FIB_PROTOCOL_MPLS, table_id); + + if (~0 == fib_index) + { + fib_table_find_or_create_and_lock_w_name (FIB_PROTOCOL_MPLS, + table_id, + (is_api ? + FIB_SOURCE_API : + FIB_SOURCE_CLI), name); + } +} + +static void +vl_api_mpls_tunnel_add_del_t_handler (vl_api_mpls_tunnel_add_del_t * mp) +{ + vl_api_mpls_tunnel_add_del_reply_t *rmp; + int rv = 0; + u32 tunnel_sw_if_index; + int ii; + fib_route_path_t rpath, *rpaths = NULL; + + memset (&rpath, 0, sizeof (rpath)); + + stats_dslock_with_hint (1 /* release hint */ , 5 /* tag */ ); + + if (mp->mt_next_hop_proto_is_ip4) + { + rpath.frp_proto = DPO_PROTO_IP4; + clib_memcpy (&rpath.frp_addr.ip4, + mp->mt_next_hop, sizeof (rpath.frp_addr.ip4)); + } + else + { + rpath.frp_proto = DPO_PROTO_IP6; + clib_memcpy (&rpath.frp_addr.ip6, + mp->mt_next_hop, sizeof (rpath.frp_addr.ip6)); + } + rpath.frp_sw_if_index = ntohl (mp->mt_next_hop_sw_if_index); + rpath.frp_weight = 1; + + if (mp->mt_is_add) + { + for (ii = 0; ii < mp->mt_next_hop_n_out_labels; ii++) + vec_add1 (rpath.frp_label_stack, + ntohl (mp->mt_next_hop_out_label_stack[ii])); + } + + vec_add1 (rpaths, rpath); + + tunnel_sw_if_index = ntohl (mp->mt_sw_if_index); + + if (mp->mt_is_add) + { + if (~0 == tunnel_sw_if_index) + tunnel_sw_if_index = vnet_mpls_tunnel_create (mp->mt_l2_only, + mp->mt_is_multicast); + vnet_mpls_tunnel_path_add (tunnel_sw_if_index, rpaths); + } + else + { + tunnel_sw_if_index = ntohl (mp->mt_sw_if_index); + if (!vnet_mpls_tunnel_path_remove (tunnel_sw_if_index, rpaths)) + vnet_mpls_tunnel_del (tunnel_sw_if_index); + } + + vec_free (rpaths); + + stats_dsunlock (); + + /* *INDENT-OFF* */ + REPLY_MACRO2(VL_API_MPLS_TUNNEL_ADD_DEL_REPLY, + ({ + rmp->sw_if_index = ntohl(tunnel_sw_if_index); + })); + /* *INDENT-ON* */ +} + +typedef struct mpls_tunnel_send_walk_ctx_t_ +{ + unix_shared_memory_queue_t *q; + u32 index; + u32 context; +} mpls_tunnel_send_walk_ctx_t; + +static void +send_mpls_tunnel_entry (u32 mti, void *arg) +{ + fib_route_path_encode_t *api_rpaths, *api_rpath; + mpls_tunnel_send_walk_ctx_t *ctx; + vl_api_mpls_tunnel_details_t *mp; + const mpls_tunnel_t *mt; + vl_api_fib_path2_t *fp; + u32 n; + + ctx = arg; + + if (~0 != ctx->index && mti != ctx->index) + return; + + mt = mpls_tunnel_get (mti); + n = fib_path_list_get_n_paths (mt->mt_path_list); + + mp = vl_msg_api_alloc (sizeof (*mp) + n * sizeof (vl_api_fib_path2_t)); + memset (mp, 0, sizeof (*mp) + n * sizeof (vl_api_fib_path2_t)); + + mp->_vl_msg_id = ntohs (VL_API_MPLS_TUNNEL_DETAILS); + mp->context = ctx->context; + + mp->mt_tunnel_index = ntohl (mti); + mp->mt_count = ntohl (n); + + fib_path_list_walk (mt->mt_path_list, fib_path_encode, &api_rpaths); + + fp = mp->mt_paths; + vec_foreach (api_rpath, api_rpaths) + { + memset (fp, 0, sizeof (*fp)); + + fp->weight = api_rpath->rpath.frp_weight; + fp->preference = api_rpath->rpath.frp_preference; + fp->sw_if_index = htonl (api_rpath->rpath.frp_sw_if_index); + copy_fib_next_hop (api_rpath, fp); + fp++; + } + + // FIXME + // memcpy (mp->mt_next_hop_out_labels, + // mt->mt_label_stack, nlabels * sizeof (u32)); + + + vl_msg_api_send_shmem (ctx->q, (u8 *) & mp); +} + +static void +vl_api_mpls_tunnel_dump_t_handler (vl_api_mpls_tunnel_dump_t * mp) +{ + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + return; + + mpls_tunnel_send_walk_ctx_t ctx = { + .q = q, + .index = ntohl (mp->tunnel_index), + .context = mp->context, + }; + mpls_tunnel_walk (send_mpls_tunnel_entry, &ctx); +} + +static void +send_mpls_fib_details (vpe_api_main_t * am, + unix_shared_memory_queue_t * q, + const fib_table_t * table, + u32 label, u32 eos, + fib_route_path_encode_t * api_rpaths, u32 context) +{ + vl_api_mpls_fib_details_t *mp; + fib_route_path_encode_t *api_rpath; + vl_api_fib_path2_t *fp; + int path_count; + + path_count = vec_len (api_rpaths); + mp = vl_msg_api_alloc (sizeof (*mp) + path_count * sizeof (*fp)); + if (!mp) + return; + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = ntohs (VL_API_MPLS_FIB_DETAILS); + mp->context = context; + + mp->table_id = htonl (table->ft_table_id); + memcpy (mp->table_name, table->ft_desc, + clib_min (vec_len (table->ft_desc), sizeof (mp->table_name))); + mp->eos_bit = eos; + mp->label = htonl (label); + + mp->count = htonl (path_count); + fp = mp->path; + vec_foreach (api_rpath, api_rpaths) + { + memset (fp, 0, sizeof (*fp)); + fp->weight = api_rpath->rpath.frp_weight; + fp->preference = api_rpath->rpath.frp_preference; + fp->sw_if_index = htonl (api_rpath->rpath.frp_sw_if_index); + copy_fib_next_hop (api_rpath, fp); + fp++; + } + + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +typedef struct vl_api_mpls_fib_dump_table_walk_ctx_t_ +{ + fib_node_index_t *lfeis; +} vl_api_mpls_fib_dump_table_walk_ctx_t; + +static int +vl_api_mpls_fib_dump_table_walk (fib_node_index_t fei, void *arg) +{ + vl_api_mpls_fib_dump_table_walk_ctx_t *ctx = arg; + + vec_add1 (ctx->lfeis, fei); + + return (1); +} + +static void +vl_api_mpls_fib_dump_t_handler (vl_api_mpls_fib_dump_t * mp) +{ + vpe_api_main_t *am = &vpe_api_main; + unix_shared_memory_queue_t *q; + mpls_main_t *mm = &mpls_main; + fib_table_t *fib_table; + mpls_fib_t *mpls_fib; + fib_node_index_t *lfeip = NULL; + fib_prefix_t pfx; + u32 fib_index; + fib_route_path_encode_t *api_rpaths; + vl_api_mpls_fib_dump_table_walk_ctx_t ctx = { + .lfeis = NULL, + }; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + return; + + /* *INDENT-OFF* */ + pool_foreach (mpls_fib, mm->mpls_fibs, + ({ + mpls_fib_table_walk (mpls_fib, + vl_api_mpls_fib_dump_table_walk, + &ctx); + })); + /* *INDENT-ON* */ + vec_sort_with_function (ctx.lfeis, fib_entry_cmp_for_sort); + + vec_foreach (lfeip, ctx.lfeis) + { + fib_entry_get_prefix (*lfeip, &pfx); + fib_index = fib_entry_get_fib_index (*lfeip); + fib_table = fib_table_get (fib_index, pfx.fp_proto); + api_rpaths = NULL; + fib_entry_encode (*lfeip, &api_rpaths); + send_mpls_fib_details (am, q, + fib_table, pfx.fp_label, + pfx.fp_eos, api_rpaths, mp->context); + vec_free (api_rpaths); + } + + vec_free (ctx.lfeis); +} + +/* + * mpls_api_hookup + * Add vpe's API message handlers to the table. + * vlib has alread mapped shared memory and + * added the client registration handlers. + * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process() + */ +#define vl_msg_name_crc_list +#include <vnet/vnet_all_api_h.h> +#undef vl_msg_name_crc_list + +static void +setup_message_id_table (api_main_t * am) +{ +#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id); + foreach_vl_msg_name_crc_mpls; +#undef _ +} + +static clib_error_t * +mpls_api_hookup (vlib_main_t * vm) +{ + api_main_t *am = &api_main; + +#define _(N,n) \ + vl_msg_api_set_handlers(VL_API_##N, #n, \ + vl_api_##n##_t_handler, \ + vl_noop_handler, \ + vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, \ + sizeof(vl_api_##n##_t), 1); + foreach_vpe_api_msg; +#undef _ + + /* + * Trace space for 8 MPLS encap labels + */ + am->api_trace_cfg[VL_API_MPLS_TUNNEL_ADD_DEL].size += 8 * sizeof (u32); + + /* + * Set up the (msg_name, crc, message-id) table + */ + setup_message_id_table (am); + + return 0; +} + +VLIB_API_INIT_FUNCTION (mpls_api_hookup); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |