/* *------------------------------------------------------------------ * dhcp_api.c - dhcp 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/dhcp/dhcp_proxy.h> #include <vnet/dhcp/client.h> #include <vnet/dhcp/dhcp6_pd_client_dp.h> #include <vnet/dhcp/dhcp6_ia_na_client_dp.h> #include <vnet/dhcp/dhcp6_client_common_dp.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 \ _(DHCP_PROXY_CONFIG,dhcp_proxy_config) \ _(DHCP_PROXY_DUMP,dhcp_proxy_dump) \ _(DHCP_PROXY_SET_VSS,dhcp_proxy_set_vss) \ _(DHCP_CLIENT_CONFIG, dhcp_client_config) \ _(DHCP_CLIENT_DUMP, dhcp_client_dump) \ _(WANT_DHCP6_PD_REPLY_EVENTS, want_dhcp6_pd_reply_events) \ _(DHCP6_PD_SEND_CLIENT_MESSAGE, dhcp6_pd_send_client_message) \ _(WANT_DHCP6_REPLY_EVENTS, want_dhcp6_reply_events) \ _(DHCP6_SEND_CLIENT_MESSAGE, dhcp6_send_client_message) \ _(DHCP6_CLIENTS_ENABLE_DISABLE, dhcp6_clients_enable_disable) \ _(DHCP6_DUID_LL_SET, dhcp6_duid_ll_set) static void vl_api_dhcp_proxy_set_vss_t_handler (vl_api_dhcp_proxy_set_vss_t * mp) { vl_api_dhcp_proxy_set_vss_reply_t *rmp; u8 *vpn_ascii_id; int rv; mp->vpn_ascii_id[sizeof (mp->vpn_ascii_id) - 1] = 0; vpn_ascii_id = format (0, "%s", mp->vpn_ascii_id); rv = dhcp_proxy_set_vss ((mp->is_ipv6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4), ntohl (mp->tbl_id), mp->vss_type, vpn_ascii_id, ntohl (mp->oui), ntohl (mp->vpn_index), mp->is_add == 0); REPLY_MACRO (VL_API_DHCP_PROXY_SET_VSS_REPLY); } static void vl_api_dhcp_proxy_config_t_handler (vl_api_dhcp_proxy_config_t * mp) { vl_api_dhcp_proxy_set_vss_reply_t *rmp; ip46_address_t src, server; int rv = -1; if (mp->is_ipv6) { clib_memcpy (&src.ip6, mp->dhcp_src_address, sizeof (src.ip6)); clib_memcpy (&server.ip6, mp->dhcp_server, sizeof (server.ip6)); rv = dhcp6_proxy_set_server (&server, &src, (u32) ntohl (mp->rx_vrf_id), (u32) ntohl (mp->server_vrf_id), (int) (mp->is_add == 0)); } else { ip46_address_reset (&src); ip46_address_reset (&server); clib_memcpy (&src.ip4, mp->dhcp_src_address, sizeof (src.ip4)); clib_memcpy (&server.ip4, mp->dhcp_server, sizeof (server.ip4)); rv = dhcp4_proxy_set_server (&server, &src, (u32) ntohl (mp->rx_vrf_id), (u32) ntohl (mp->server_vrf_id), (int) (mp->is_add == 0)); } REPLY_MACRO (VL_API_DHCP_PROXY_CONFIG_REPLY); } static void vl_api_dhcp_proxy_dump_t_handler (vl_api_dhcp_proxy_dump_t * mp) { vl_api_registration_t *reg; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return;; dhcp_proxy_dump ((mp->is_ip6 == 1 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4), reg, mp->context); } void dhcp_send_details (fib_protocol_t proto, void *opaque, u32 context, dhcp_proxy_t * proxy) { vl_api_dhcp_proxy_details_t *mp; vl_api_registration_t *reg = opaque; vl_api_dhcp_server_t *v_server; dhcp_server_t *server; fib_table_t *s_fib; dhcp_vss_t *vss; u32 count; size_t n; count = vec_len (proxy->dhcp_servers); n = sizeof (*mp) + (count * sizeof (vl_api_dhcp_server_t)); mp = vl_msg_api_alloc (n); if (!mp) return; clib_memset (mp, 0, n); mp->_vl_msg_id = ntohs (VL_API_DHCP_PROXY_DETAILS); mp->context = context; mp->count = count; mp->is_ipv6 = (proto == FIB_PROTOCOL_IP6); mp->rx_vrf_id = htonl (dhcp_proxy_rx_table_get_table_id (proto, proxy->rx_fib_index)); vss = dhcp_get_vss_info (&dhcp_proxy_main, proxy->rx_fib_index, proto); if (vss) { mp->vss_type = vss->vss_type; if (vss->vss_type == VSS_TYPE_ASCII) { u32 id_len = vec_len (vss->vpn_ascii_id); clib_memcpy (mp->vss_vpn_ascii_id, vss->vpn_ascii_id, id_len); } else if (vss->vss_type == VSS_TYPE_VPN_ID) { u32 oui = ((u32) vss->vpn_id[0] << 16) + ((u32) vss->vpn_id[1] << 8) + ((u32) vss->vpn_id[2]); u32 fib_id = ((u32) vss->vpn_id[3] << 24) + ((u32) vss->vpn_id[4] << 16) + ((u32) vss->vpn_id[5] << 8) + ((u32) vss->vpn_id[6]); mp->vss_oui = htonl (oui); mp->vss_fib_id = htonl (fib_id); } } else mp->vss_type = VSS_TYPE_INVALID; vec_foreach_index (count, proxy->dhcp_servers) { server = &proxy->dhcp_servers[count]; v_server = &mp->servers[count]; s_fib = fib_table_get (server->server_fib_index, proto); v_server->server_vrf_id = htonl (s_fib->ft_table_id); if (mp->is_ipv6) { memcpy (v_server->dhcp_server, &server->dhcp_server.ip6, 16); } else { /* put the address in the first bytes */ memcpy (v_server->dhcp_server, &server->dhcp_server.ip4, 4); } } if (mp->is_ipv6) { memcpy (mp->dhcp_src_address, &proxy->dhcp_src_address.ip6, 16); } else { /* put the address in the first bytes */ memcpy (mp->dhcp_src_address, &proxy->dhcp_src_address.ip4, 4); } vl_api_send_msg (reg, (u8 *) mp); } static void dhcp_client_lease_encode (vl_api_dhcp_lease_t * lease, const dhcp_client_t * client) { size_t len; lease->is_ipv6 = 0; // only support IPv6 clients lease->sw_if_index = ntohl (client->sw_if_index); lease->state = client->state; len = clib_min (sizeof (lease->hostname) - 1, vec_len (client->hostname)); clib_memcpy (&lease->hostname, client->hostname, len); lease->hostname[len] = 0; lease->mask_width = client->subnet_mask_width; clib_memcpy (&lease->host_address[0], (u8 *) & client->leased_address, 4); clib_memcpy (&lease->router_address[0], (u8 *) & client->router_address, 4); if (NULL != client->l2_rewrite) clib_memcpy (&lease->host_mac[0], client->l2_rewrite + 6, 6); } static void dhcp_client_data_encode (vl_api_dhcp_client_t * vclient, const dhcp_client_t * client) { size_t len; vclient->sw_if_index = ntohl (client->sw_if_index); len = clib_min (sizeof (vclient->hostname) - 1, vec_len (client->hostname)); clib_memcpy (&vclient->hostname, client->hostname, len); vclient->hostname[len] = 0; len = clib_min (sizeof (vclient->id) - 1, vec_len (client->client_identifier)); clib_memcpy (&vclient->id, client->client_identifier, len); vclient->id[len] = 0; if (NULL != client->event_callback) vclient->want_dhcp_event = 1; else vclient->want_dhcp_event = 0; vclient->set_broadcast_flag = client->set_broadcast_flag; vclient->pid = client->pid; } static void dhcp_compl_event_callback (u32 client_index, const dhcp_client_t * client) { vl_api_registration_t *reg; vl_api_dhcp_compl_event_t *mp; reg = vl_api_client_index_to_registration (client_index); if (!reg) return; mp = vl_msg_api_alloc (sizeof (*mp)); mp->client_index = client_index; mp->pid = client->pid; dhcp_client_lease_encode (&mp->lease, client); mp->_vl_msg_id = ntohs (VL_API_DHCP_COMPL_EVENT); vl_api_send_msg (reg, (u8 *) mp); } static void vl_api_dhcp_client_config_t_handler (vl_api_dhcp_client_config_t * mp) { vlib_main_t *vm = vlib_get_main (); vl_api_dhcp_client_config_reply_t *rmp; u32 sw_if_index; int rv = 0; sw_if_index = ntohl (mp->client.sw_if_index); if (!vnet_sw_if_index_is_api_valid (sw_if_index)) { rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; goto bad_sw_if_index; } rv = dhcp_client_config (mp->is_add, mp->client_index, vm, sw_if_index, mp->client.hostname, mp->client.id, (mp->client.want_dhcp_event ? dhcp_compl_event_callback : NULL), mp->client.set_broadcast_flag, mp->client.pid); BAD_SW_IF_INDEX_LABEL; REPLY_MACRO (VL_API_DHCP_CLIENT_CONFIG_REPLY); } typedef struct dhcp_client_send_walk_ctx_t_ { vl_api_registration_t *reg; u32 context; } dhcp_client_send_walk_ctx_t; static int send_dhcp_client_entry (const dhcp_client_t * client, void *arg) { dhcp_client_send_walk_ctx_t *ctx; vl_api_dhcp_client_details_t *mp; ctx = arg; mp = vl_msg_api_alloc (sizeof (*mp)); clib_memset (mp, 0, sizeof (*mp)); mp->_vl_msg_id = ntohs (VL_API_DHCP_CLIENT_DETAILS); mp->context = ctx->context; dhcp_client_data_encode (&mp->client, client); dhcp_client_lease_encode (&mp->lease, client); vl_api_send_msg (ctx->reg, (u8 *) mp); return (1); } static void vl_api_dhcp_client_dump_t_handler (vl_api_dhcp_client_dump_t * mp) { vl_api_registration_t *reg; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; dhcp_client_send_walk_ctx_t ctx = { .reg = reg, .context = mp->context, }; dhcp_client_walk (send_dhcp_client_entry, &ctx); } /* * dhcp_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_dhcp; #undef _ } static clib_error_t * dhcp_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); dhcp6_pd_set_publisher_node (dhcp6_pd_reply_process_node.index, DHCP6_PD_DP_REPLY_REPORT); dhcp6_set_publisher_node (dhcp6_reply_process_node.index, DHCP6_DP_REPLY_REPORT); return 0; } VLIB_API_INIT_FUNCTION (dhcp_api_hookup); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */