/* *------------------------------------------------------------------ * 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/tunnel/tunnel_types_api.h> #include <vnet/ip/ip_types_api.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_TUNNEL_ADD_DEL, gre_tunnel_add_del) \ _(GRE_TUNNEL_DUMP, gre_tunnel_dump) static int gre_tunnel_type_decode (vl_api_gre_tunnel_type_t in, gre_tunnel_type_t * out) { switch (in) { #define _(n, v) \ case GRE_API_TUNNEL_TYPE_##n: \ *out = GRE_TUNNEL_TYPE_##n; \ return (0); foreach_gre_tunnel_type #undef _ } return (VNET_API_ERROR_INVALID_VALUE); } static vl_api_gre_tunnel_type_t gre_tunnel_type_encode (gre_tunnel_type_t in) { vl_api_gre_tunnel_type_t out = GRE_API_TUNNEL_TYPE_L3; switch (in) { #define _(n, v) \ case GRE_TUNNEL_TYPE_##n: \ out = GRE_API_TUNNEL_TYPE_##n; \ break; foreach_gre_tunnel_type #undef _ } return (out); } static void vl_api_gre_tunnel_add_del_t_handler (vl_api_gre_tunnel_add_del_t * mp) { vnet_gre_tunnel_add_del_args_t _a = { }, *a = &_a; vl_api_gre_tunnel_add_del_reply_t *rmp; tunnel_encap_decap_flags_t flags; u32 sw_if_index = ~0; ip46_type_t itype[2]; int rv = 0; itype[0] = ip_address_decode (&mp->tunnel.src, &a->src); itype[1] = ip_address_decode (&mp->tunnel.dst, &a->dst); if (itype[0] != itype[1]) { rv = VNET_API_ERROR_INVALID_PROTOCOL; goto out; } if (ip46_address_is_equal (&a->src, &a->dst)) { rv = VNET_API_ERROR_SAME_SRC_DST; goto out; } rv = gre_tunnel_type_decode (mp->tunnel.type, &a->type); if (rv) goto out; rv = tunnel_mode_decode (mp->tunnel.mode, &a->mode); if (rv) goto out; rv = tunnel_encap_decap_flags_decode (mp->tunnel.flags, &flags); if (rv) goto out; a->is_add = mp->is_add; a->is_ipv6 = (itype[0] == IP46_TYPE_IP6); a->instance = ntohl (mp->tunnel.instance); a->session_id = ntohs (mp->tunnel.session_id); a->outer_table_id = ntohl (mp->tunnel.outer_table_id); a->flags = flags; rv = vnet_gre_tunnel_add_del (a, &sw_if_index); out: /* *INDENT-OFF* */ REPLY_MACRO2(VL_API_GRE_TUNNEL_ADD_DEL_REPLY, ({ rmp->sw_if_index = ntohl (sw_if_index); })); /* *INDENT-ON* */ } static void send_gre_tunnel_details (gre_tunnel_t * t, vl_api_registration_t * reg, u32 context) { vl_api_gre_tunnel_details_t *rmp; rmp = vl_msg_api_alloc (sizeof (*rmp)); clib_memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = htons (VL_API_GRE_TUNNEL_DETAILS); ip_address_encode (&t->tunnel_src, IP46_TYPE_ANY, &rmp->tunnel.src); ip_address_encode (&t->tunnel_dst.fp_addr, IP46_TYPE_ANY, &rmp->tunnel.dst); rmp->tunnel.outer_table_id = htonl (fib_table_get_table_id (t->outer_fib_index, t->tunnel_dst.fp_proto)); rmp->tunnel.type = gre_tunnel_type_encode (t->type); rmp->tunnel.mode = tunnel_mode_encode (t->mode); rmp->tunnel.instance = htonl (t->user_instance); rmp->tunnel.sw_if_index = htonl (t->sw_if_index); rmp->tunnel.session_id = htons (t->session_id); rmp->context = context; vl_api_send_msg (reg, (u8 *) rmp); } static void vl_api_gre_tunnel_dump_t_handler (vl_api_gre_tunnel_dump_t * mp) { vl_api_registration_t *reg; gre_main_t *gm = &gre_main; gre_tunnel_t *t; u32 sw_if_index; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) 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, reg, 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, reg, mp->context); } } /* * gre_api_hookup * Add vpe's API message handlers to the table. * vlib has already 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 = vlibapi_get_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: */