/* *------------------------------------------------------------------ * gre_api.c - gre 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/gre/gre.h> #include <vnet/fib/fib_table.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 \ _(GRE_ADD_DEL_TUNNEL, gre_add_del_tunnel) \ _(GRE_TUNNEL_DUMP, gre_tunnel_dump) static void vl_api_gre_add_del_tunnel_t_handler (vl_api_gre_add_del_tunnel_t * mp) { vl_api_gre_add_del_tunnel_reply_t *rmp; int rv = 0; vnet_gre_add_del_tunnel_args_t _a, *a = &_a; u32 outer_fib_id; u32 p; u32 sw_if_index = ~0; p = fib_table_find (!mp->is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6, ntohl (mp->outer_fib_id)); if (p == ~0) { rv = VNET_API_ERROR_NO_SUCH_FIB; goto out; } outer_fib_id = p; /* Check src & dst are different */ if ((mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 16) == 0) || (!mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 4) == 0)) { rv = VNET_API_ERROR_SAME_SRC_DST; goto out; } memset (a, 0, sizeof (*a)); a->is_add = mp->is_add; a->teb = mp->teb; a->is_ipv6 = mp->is_ipv6; /* ip addresses sent in network byte order */ if (!mp->is_ipv6) { clib_memcpy (&(a->src.ip4), mp->src_address, 4); clib_memcpy (&(a->dst.ip4), mp->dst_address, 4); } else { clib_memcpy (&(a->src.ip6), mp->src_address, 16); clib_memcpy (&(a->dst.ip6), mp->dst_address, 16); } a->outer_fib_id = outer_fib_id; rv = vnet_gre_add_del_tunnel (a, &sw_if_index); out: /* *INDENT-OFF* */ REPLY_MACRO2(VL_API_GRE_ADD_DEL_TUNNEL_REPLY, ({ rmp->sw_if_index = ntohl (sw_if_index); })); /* *INDENT-ON* */ } static void send_gre_tunnel_details (gre_tunnel_t * t, unix_shared_memory_queue_t * q, u32 context) { vl_api_gre_tunnel_details_t *rmp; u8 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0; fib_table_t *ft; rmp = vl_msg_api_alloc (sizeof (*rmp)); memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_GRE_TUNNEL_DETAILS); if (!is_ipv6) { clib_memcpy (rmp->src_address, &(t->tunnel_src.ip4.as_u8), 4); clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip4.as_u8), 4); ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP4); rmp->outer_fib_id = ft->ft_table_id; } else { clib_memcpy (rmp->src_address, &(t->tunnel_src.ip6.as_u8), 16); clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip6.as_u8), 16); ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP6); rmp->outer_fib_id = ft->ft_table_id; } rmp->teb = (GRE_TUNNEL_TYPE_TEB == t->type); rmp->sw_if_index = htonl (t->sw_if_index); rmp->context = context; rmp->is_ipv6 = is_ipv6; vl_msg_api_send_shmem (q, (u8 *) & rmp); } static void vl_api_gre_tunnel_dump_t_handler (vl_api_gre_tunnel_dump_t * mp) { unix_shared_memory_queue_t *q; gre_main_t *gm = &gre_main; gre_tunnel_t *t; u32 sw_if_index; q = vl_api_client_index_to_input_queue (mp->client_index); if (q == 0) { return; } sw_if_index = ntohl (mp->sw_if_index); if (~0 == sw_if_index) { /* *INDENT-OFF* */ pool_foreach (t, gm->tunnels, ({ send_gre_tunnel_details(t, q, mp->context); })); /* *INDENT-ON* */ } else { if ((sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index)) || (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index])) { return; } t = &gm->tunnels[gm->tunnel_index_by_sw_if_index[sw_if_index]]; send_gre_tunnel_details (t, q, mp->context); } } /* * gre_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_gre; #undef _ } static clib_error_t * gre_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 _ /* * Set up the (msg_name, crc, message-id) table */ setup_message_id_table (am); return 0; } VLIB_API_INIT_FUNCTION (gre_api_hookup); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */