+++ /dev/null
-/*
- * proxy_node.c: common dhcp v4 and v6 proxy node processing
- *
- * Copyright (c) 2013 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/dhcp/dhcp_proxy.h>
-#include <vnet/fib/fib_table.h>
-#include <vnet/mfib/mfib_table.h>
-
-/**
- * @brief Shard 4/6 instance of DHCP main
- */
-dhcp_proxy_main_t dhcp_proxy_main;
-
-static void
-dhcp_proxy_rx_table_lock (fib_protocol_t proto, u32 fib_index)
-{
- if (FIB_PROTOCOL_IP4 == proto)
- fib_table_lock (fib_index, proto, FIB_SOURCE_DHCP);
- else
- mfib_table_lock (fib_index, proto, MFIB_SOURCE_DHCP);
-}
-
-static void
-dhcp_proxy_rx_table_unlock (fib_protocol_t proto, u32 fib_index)
-{
- if (FIB_PROTOCOL_IP4 == proto)
- fib_table_unlock (fib_index, proto, FIB_SOURCE_DHCP);
- else
- mfib_table_unlock (fib_index, proto, MFIB_SOURCE_DHCP);
-}
-
-u32
-dhcp_proxy_rx_table_get_table_id (fib_protocol_t proto, u32 fib_index)
-{
- if (FIB_PROTOCOL_IP4 == proto)
- {
- fib_table_t *fib;
-
- fib = fib_table_get (fib_index, proto);
-
- return (fib->ft_table_id);
- }
- else
- {
- mfib_table_t *mfib;
-
- mfib = mfib_table_get (fib_index, proto);
-
- return (mfib->mft_table_id);
- }
-}
-
-void
-dhcp_proxy_walk (fib_protocol_t proto, dhcp_proxy_walk_fn_t fn, void *ctx)
-{
- dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
- dhcp_proxy_t *server;
- u32 server_index, i;
-
- vec_foreach_index (i, dpm->dhcp_server_index_by_rx_fib_index[proto])
- {
- server_index = dpm->dhcp_server_index_by_rx_fib_index[proto][i];
- if (~0 == server_index)
- continue;
-
- server = pool_elt_at_index (dpm->dhcp_servers[proto], server_index);
-
- if (!fn (server, ctx))
- break;
- }
-}
-
-void
-dhcp_vss_walk (fib_protocol_t proto, dhcp_vss_walk_fn_t fn, void *ctx)
-{
- dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
- mfib_table_t *mfib;
- dhcp_vss_t *vss;
- u32 vss_index, i;
- fib_table_t *fib;
-
- vec_foreach_index (i, dpm->vss_index_by_rx_fib_index[proto])
- {
- vss_index = dpm->vss_index_by_rx_fib_index[proto][i];
- if (~0 == vss_index)
- continue;
-
- vss = pool_elt_at_index (dpm->vss[proto], vss_index);
-
- if (FIB_PROTOCOL_IP4 == proto)
- {
- fib = fib_table_get (i, proto);
-
- if (!fn (vss, fib->ft_table_id, ctx))
- break;
- }
- else
- {
- mfib = mfib_table_get (i, proto);
-
- if (!fn (vss, mfib->mft_table_id, ctx))
- break;
- }
- }
-}
-
-static u32
-dhcp_proxy_server_find (dhcp_proxy_t * proxy,
- fib_protocol_t proto,
- ip46_address_t * addr, u32 server_table_id)
-{
- dhcp_server_t *server;
- u32 ii, fib_index;
-
- vec_foreach_index (ii, proxy->dhcp_servers)
- {
- server = &proxy->dhcp_servers[ii];
- fib_index = fib_table_find (proto, server_table_id);
-
- if (ip46_address_is_equal (&server->dhcp_server,
- addr) &&
- (server->server_fib_index == fib_index))
- {
- return (ii);
- }
- }
- return (~0);
-}
-
-int
-dhcp_proxy_server_del (fib_protocol_t proto,
- u32 rx_fib_index,
- ip46_address_t * addr, u32 server_table_id)
-{
- dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
- dhcp_proxy_t *proxy = 0;
-
- proxy = dhcp_get_proxy (dpm, rx_fib_index, proto);
-
- if (NULL != proxy)
- {
- dhcp_server_t *server;
- u32 index;
-
- index = dhcp_proxy_server_find (proxy, proto, addr, server_table_id);
-
- if (~0 != index)
- {
- server = &proxy->dhcp_servers[index];
- fib_table_unlock (server->server_fib_index, proto, FIB_SOURCE_DHCP);
-
- vec_del1 (proxy->dhcp_servers, index);
-
- if (0 == vec_len (proxy->dhcp_servers))
- {
- /* no servers left, delete the proxy config */
- dpm->dhcp_server_index_by_rx_fib_index[proto][rx_fib_index] =
- ~0;
- vec_free (proxy->dhcp_servers);
- pool_put (dpm->dhcp_servers[proto], proxy);
- return (1);
- }
- }
- }
-
- /* the proxy still exists */
- return (0);
-}
-
-int
-dhcp_proxy_server_add (fib_protocol_t proto,
- ip46_address_t * addr,
- ip46_address_t * src_address,
- u32 rx_fib_index, u32 server_table_id)
-{
- dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
- dhcp_proxy_t *proxy = 0;
- int new = 0;
-
- proxy = dhcp_get_proxy (dpm, rx_fib_index, proto);
-
- if (NULL == proxy)
- {
- vec_validate_init_empty (dpm->dhcp_server_index_by_rx_fib_index[proto],
- rx_fib_index, ~0);
-
- pool_get (dpm->dhcp_servers[proto], proxy);
- clib_memset (proxy, 0, sizeof (*proxy));
- new = 1;
-
- dpm->dhcp_server_index_by_rx_fib_index[proto][rx_fib_index] =
- proxy - dpm->dhcp_servers[proto];
-
- proxy->dhcp_src_address = *src_address;
- proxy->rx_fib_index = rx_fib_index;
- }
- else
- {
- if (~0 != dhcp_proxy_server_find (proxy, proto, addr, server_table_id))
- {
- return (new);
- }
- }
-
- dhcp_server_t server = {
- .dhcp_server = *addr,
- .server_fib_index = fib_table_find_or_create_and_lock (proto,
- server_table_id,
- FIB_SOURCE_DHCP),
- };
-
- vec_add1 (proxy->dhcp_servers, server);
-
- return (new);
-}
-
-typedef struct dhcp4_proxy_dump_walk_ctx_t_
-{
- fib_protocol_t proto;
- void *opaque;
- u32 context;
-} dhcp_proxy_dump_walk_cxt_t;
-
-static int
-dhcp_proxy_dump_walk (dhcp_proxy_t * proxy, void *arg)
-{
- dhcp_proxy_dump_walk_cxt_t *ctx = arg;
-
- dhcp_send_details (ctx->proto, ctx->opaque, ctx->context, proxy);
-
- return (1);
-}
-
-void
-dhcp_proxy_dump (fib_protocol_t proto, void *opaque, u32 context)
-{
- dhcp_proxy_dump_walk_cxt_t ctx = {
- .proto = proto,
- .opaque = opaque,
- .context = context,
- };
- dhcp_proxy_walk (proto, dhcp_proxy_dump_walk, &ctx);
-}
-
-int
-dhcp_vss_show_walk (dhcp_vss_t * vss, u32 rx_table_id, void *ctx)
-{
- vlib_main_t *vm = ctx;
-
- 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]);
- vlib_cli_output (vm, " fib_table: %d oui: %d vpn_index: %d",
- rx_table_id, oui, fib_id);
- }
- else if (vss->vss_type == VSS_TYPE_ASCII)
- vlib_cli_output (vm, " fib_table: %d vpn_id: %s",
- rx_table_id, vss->vpn_ascii_id);
- else
- vlib_cli_output (vm, " fib_table: %d default global vpn", rx_table_id);
-
- return (1);
-}
-
-void
-update_vss (dhcp_vss_t * v,
- u8 vss_type, u8 * vpn_ascii_id, u32 oui, u32 vpn_index)
-{
- v->vss_type = vss_type;
- if (v->vpn_ascii_id)
- {
- if (v->vpn_ascii_id == (u8 *) ~ 0)
- v->vpn_ascii_id = 0;
- else
- vec_free (v->vpn_ascii_id);
- }
-
- if (vss_type == VSS_TYPE_ASCII)
- v->vpn_ascii_id = vpn_ascii_id;
- else if (vss_type == VSS_TYPE_VPN_ID)
- {
- v->vpn_id[0] = (oui >> 16) & 0xff;
- v->vpn_id[1] = (oui >> 8) & 0xff;
- v->vpn_id[2] = (oui >> 0) & 0xff;
- v->vpn_id[3] = (vpn_index >> 24) & 0xff;
- v->vpn_id[4] = (vpn_index >> 16) & 0xff;
- v->vpn_id[5] = (vpn_index >> 8) & 0xff;
- v->vpn_id[6] = (vpn_index >> 0) & 0xff;
- }
-}
-
-int
-dhcp_proxy_set_vss (fib_protocol_t proto,
- u32 tbl_id,
- u8 vss_type,
- u8 * vpn_ascii_id, u32 oui, u32 vpn_index, u8 is_del)
-{
- dhcp_proxy_main_t *dm = &dhcp_proxy_main;
- dhcp_vss_t *v = NULL;
- u32 rx_fib_index;
- int rc = 0;
-
- if (proto == FIB_PROTOCOL_IP4)
- rx_fib_index = fib_table_find_or_create_and_lock (proto, tbl_id,
- FIB_SOURCE_DHCP);
- else
- rx_fib_index = mfib_table_find_or_create_and_lock (proto, tbl_id,
- MFIB_SOURCE_DHCP);
- v = dhcp_get_vss_info (dm, rx_fib_index, proto);
-
- if (NULL != v)
- {
- if (is_del)
- {
- /* release the lock held on the table when the VSS
- * info was created */
- dhcp_proxy_rx_table_unlock (proto, rx_fib_index);
-
- vec_free (v->vpn_ascii_id);
- pool_put (dm->vss[proto], v);
- dm->vss_index_by_rx_fib_index[proto][rx_fib_index] = ~0;
- }
- else
- {
- update_vss (v, vss_type, vpn_ascii_id, oui, vpn_index);
- }
- }
- else
- {
- if (is_del)
- rc = VNET_API_ERROR_NO_SUCH_ENTRY;
- else
- {
- /* create a new entry */
- vec_validate_init_empty (dm->vss_index_by_rx_fib_index[proto],
- rx_fib_index, ~0);
-
- /* hold a lock on the table whilst the VSS info exist */
- pool_get (dm->vss[proto], v);
- update_vss (v, vss_type, vpn_ascii_id, oui, vpn_index);
- dm->vss_index_by_rx_fib_index[proto][rx_fib_index] =
- v - dm->vss[proto];
- dhcp_proxy_rx_table_lock (proto, rx_fib_index);
- }
- }
-
- /* Release the lock taken during the create_or_lock at the start */
- dhcp_proxy_rx_table_unlock (proto, rx_fib_index);
-
- return (rc);
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff