--- /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 <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