8a6f5d394c
Possibility to register a port via CLI or API to decap incoming UDP packets: - For CLI, a user needs to specify the inner protocol (only MPLS supported for now) - For API, the protocol is specified by index Added unittests Type: feature Change-Id: Ifedd86d8db2e355b7618472554fd67d77a13a4aa Signed-off-by: Arthur de Kerhor <arthurdekerhor@gmail.com>
248 lines
6.8 KiB
C
248 lines
6.8 KiB
C
/*
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* Copyright (c) 2018-2019 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <vnet/vnet.h>
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#include <vlibmemory/api.h>
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#include <vnet/udp/udp_local.h>
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#include <vnet/udp/udp_encap.h>
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#include <vnet/fib/fib_table.h>
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#include <vnet/ip/ip_types_api.h>
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#include <vnet/vnet_msg_enum.h>
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#define vl_typedefs /* define message structures */
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#include <vnet/vnet_all_api_h.h>
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#undef vl_typedefs
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#define vl_endianfun /* define message structures */
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#include <vnet/vnet_all_api_h.h>
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#undef vl_endianfun
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/* instantiate all the print functions we know about */
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#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
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#define vl_printfun
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#include <vnet/vnet_all_api_h.h>
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#undef vl_printfun
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#include <vlibapi/api_helper_macros.h>
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#define foreach_udp_api_msg \
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_ (UDP_ENCAP_DEL, udp_encap_del) \
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_ (UDP_ENCAP_ADD, udp_encap_add) \
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_ (UDP_ENCAP_DUMP, udp_encap_dump) \
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_ (UDP_DECAP_ADD_DEL, udp_decap_add_del)
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static void
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send_udp_encap_details (const udp_encap_t * ue, vl_api_registration_t * reg,
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u32 context)
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{
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vl_api_udp_encap_details_t *mp;
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mp = vl_msg_api_alloc (sizeof (*mp));
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clib_memset (mp, 0, sizeof (*mp));
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mp->_vl_msg_id = ntohs (VL_API_UDP_ENCAP_DETAILS);
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mp->context = context;
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if (FIB_PROTOCOL_IP4 == ue->ue_ip_proto)
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{
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clib_memcpy (&mp->udp_encap.src_ip.un.ip4,
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&ue->ue_hdrs.ip4.ue_ip4.src_address, 4);
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clib_memcpy (&mp->udp_encap.dst_ip.un.ip4,
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&ue->ue_hdrs.ip4.ue_ip4.dst_address, 4);
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mp->udp_encap.dst_ip.af = ip_address_family_encode (AF_IP4);
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mp->udp_encap.src_ip.af = ip_address_family_encode (AF_IP4);
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/* ports aren't byte swapped because they are stored in network
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* byte order */
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mp->udp_encap.src_port = ue->ue_hdrs.ip4.ue_udp.src_port;
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mp->udp_encap.dst_port = ue->ue_hdrs.ip4.ue_udp.dst_port;
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}
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else
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{
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clib_memcpy (&mp->udp_encap.src_ip.un.ip6,
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&ue->ue_hdrs.ip6.ue_ip6.src_address, 16);
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clib_memcpy (&mp->udp_encap.dst_ip.un.ip6,
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&ue->ue_hdrs.ip6.ue_ip6.dst_address, 16);
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mp->udp_encap.dst_ip.af = ip_address_family_encode (AF_IP6);
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mp->udp_encap.src_ip.af = ip_address_family_encode (AF_IP6);
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/* ports aren't byte swapped because they are stored in network
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* byte order */
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mp->udp_encap.src_port = ue->ue_hdrs.ip6.ue_udp.src_port;
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mp->udp_encap.dst_port = ue->ue_hdrs.ip6.ue_udp.dst_port;
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}
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mp->udp_encap.table_id =
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htonl (fib_table_get_table_id (ue->ue_fib_index, ue->ue_ip_proto));
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mp->udp_encap.id = htonl (ue - udp_encap_pool);
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vl_api_send_msg (reg, (u8 *) mp);
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}
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static void
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vl_api_udp_encap_dump_t_handler (vl_api_udp_encap_dump_t *mp)
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{
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vl_api_registration_t *reg;
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udp_encap_t *ue;
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reg = vl_api_client_index_to_registration (mp->client_index);
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if (!reg)
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return;
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/* *INDENT-OFF* */
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pool_foreach (ue, udp_encap_pool)
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{
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send_udp_encap_details(ue, reg, mp->context);
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}
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/* *INDENT-ON* */
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}
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static void
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vl_api_udp_encap_add_t_handler (vl_api_udp_encap_add_t *mp)
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{
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vl_api_udp_encap_add_reply_t *rmp;
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ip46_address_t src_ip, dst_ip;
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u32 fib_index, table_id;
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fib_protocol_t fproto;
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ip46_type_t itype;
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index_t uei;
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int rv = 0;
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uei = INDEX_INVALID;
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table_id = ntohl (mp->udp_encap.table_id);
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itype = ip_address_decode (&mp->udp_encap.src_ip, &src_ip);
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itype = ip_address_decode (&mp->udp_encap.dst_ip, &dst_ip);
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fproto = fib_proto_from_ip46 (itype);
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fib_index = fib_table_find (fproto, table_id);
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if (~0 == fib_index)
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{
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rv = VNET_API_ERROR_NO_SUCH_TABLE;
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goto done;
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}
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uei = udp_encap_add_and_lock (fproto, fib_index,
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&src_ip, &dst_ip,
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ntohs (mp->udp_encap.src_port),
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ntohs (mp->udp_encap.dst_port),
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UDP_ENCAP_FIXUP_NONE);
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done:
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/* *INDENT-OFF* */
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REPLY_MACRO2 (VL_API_UDP_ENCAP_ADD_REPLY,
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({
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rmp->id = ntohl (uei);
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}));
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/* *INDENT-ON* */
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}
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static void
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vl_api_udp_encap_del_t_handler (vl_api_udp_encap_del_t *mp)
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{
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vl_api_udp_encap_del_reply_t *rmp;
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int rv = 0;
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udp_encap_unlock (ntohl (mp->id));
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REPLY_MACRO (VL_API_UDP_ENCAP_DEL_REPLY);
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}
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u32
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udp_api_decap_proto_to_index (vlib_main_t *vm,
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vl_api_udp_decap_next_proto_t iproto)
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{
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switch (iproto)
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{
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case UDP_API_DECAP_PROTO_IP4:
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return vlib_get_node_by_name (vm, (u8 *) "ip4-input")->index;
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case UDP_API_DECAP_PROTO_IP6:
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return vlib_get_node_by_name (vm, (u8 *) "ip6-input")->index;
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case UDP_API_DECAP_PROTO_MPLS:
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return vlib_get_node_by_name (vm, (u8 *) "mpls-input")->index;
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}
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return ~0;
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}
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static void
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vl_api_udp_decap_add_del_t_handler (vl_api_udp_decap_add_del_t *mp)
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{
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vl_api_udp_decap_add_del_reply_t *rmp;
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vlib_main_t *vm = vlib_get_main ();
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int rv = 0;
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if (mp->is_add)
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{
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u32 node_index =
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udp_api_decap_proto_to_index (vm, ntohl (mp->udp_decap.next_proto));
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if (node_index == ~0)
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rv = VNET_API_ERROR_INVALID_PROTOCOL;
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else
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udp_register_dst_port (vm, ntohs (mp->udp_decap.port), node_index,
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mp->udp_decap.is_ip4);
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}
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else
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udp_unregister_dst_port (vm, ntohs (mp->udp_decap.port),
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mp->udp_decap.is_ip4);
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REPLY_MACRO (VL_API_UDP_DECAP_ADD_DEL_REPLY);
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}
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#define vl_msg_name_crc_list
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#include <vnet/udp/udp.api.h>
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#undef vl_msg_name_crc_list
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static void
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setup_message_id_table (api_main_t * am)
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{
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#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
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foreach_vl_msg_name_crc_udp;
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#undef _
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}
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static clib_error_t *
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udp_api_hookup (vlib_main_t * vm)
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{
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api_main_t *am = vlibapi_get_main ();
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#define _(N,n) \
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vl_msg_api_set_handlers(VL_API_##N, #n, \
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vl_api_##n##_t_handler, \
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vl_noop_handler, \
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vl_api_##n##_t_endian, \
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vl_api_##n##_t_print, \
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sizeof(vl_api_##n##_t), 1);
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foreach_udp_api_msg;
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#undef _
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/*
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* Set up the (msg_name, crc, message-id) table
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*/
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setup_message_id_table (am);
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return 0;
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}
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VLIB_API_INIT_FUNCTION (udp_api_hookup);
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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