dhcp: Move to plugin

Type: feature Change-Id: I3fe27a8ef577741d9a5c4f090ec91cf68fb44fe3 Signed-off-by: Neale Ranns <nranns@cisco.com>
2019-10-07 00:39:28 -07:00
parent 2c41a61d5f
commit 02bfd641b6
38 changed files with 1776 additions and 1736 deletions
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * client.h: dhcp client
+ */
+
+#ifndef included_dhcp_client_h
+#define included_dhcp_client_h
+
+#include <vnet/ip/ip.h>
+#include <dhcp/dhcp4_packet.h>
+
+#define foreach_dhcp_client_state               \
+_(DHCP_DISCOVER)                                \
+_(DHCP_REQUEST)                                 \
+_(DHCP_BOUND)
+
+typedef enum
+{
+#define _(a) a,
+  foreach_dhcp_client_state
+#undef _
+} dhcp_client_state_t;
+
+struct dhcp_client_t_;
+
+/**
+ * Callback function for DHCP complete events
+ */
+typedef void (*dhcp_event_cb_t) (u32 client_index,
+				 const struct dhcp_client_t_ * client);
+
+typedef struct dhcp_client_t_
+{
+  dhcp_client_state_t state;
+
+  /* the interface in question */
+  u32 sw_if_index;
+
+  /* State machine retry counter */
+  u32 retry_count;
+
+  /* Send next pkt at this time */
+  f64 next_transmit;
+  f64 lease_expires;
+
+  /* DHCP transaction ID, a random number */
+  u32 transaction_id;
+
+  /* leased address, other learned info DHCP */
+  ip4_address_t leased_address;	/* from your_ip_address field */
+  ip4_address_t dhcp_server;
+  u32 subnet_mask_width;	/* option 1 */
+  ip4_address_t router_address;	/* option 3 */
+  ip4_address_t *domain_server_address;	/* option 6 */
+  u32 lease_renewal_interval;	/* option 51 */
+  u32 lease_lifetime;		/* option 59 */
+
+  /* Requested data (option 55) */
+  u8 *option_55_data;
+
+  /* hostname and software client identifiers */
+  u8 *hostname;
+  u8 *client_identifier;	/* software version, e.g. vpe 1.0 */
+
+  /* Information used for event callback */
+  u32 client_index;
+  u32 pid;
+
+  /* Set the broadcast Flag in the Discover/Request messages */
+  u8 set_broadcast_flag;
+  /* Interface MAC address, so we can do an rx-packet-for-us check */
+  u8 client_hardware_address[6];
+  u8 client_detect_feature_enabled;
+
+  /* the unicast adjacency for the DHCP server */
+  adj_index_t ai_ucast;
+  /* the broadcast adjacency on the link */
+  adj_index_t ai_bcast;
+  /* IP DSCP to set in sent packets */
+  ip_dscp_t dscp;
+
+  dhcp_event_cb_t event_callback;
+} dhcp_client_t;
+
+typedef struct
+{
+  /* DHCP client pool */
+  dhcp_client_t *clients;
+  uword *client_by_sw_if_index;
+  u32 seed;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+} dhcp_client_main_t;
+
+typedef struct
+{
+  int is_add;
+  u32 sw_if_index;
+  u8 set_broadcast_flag;
+
+  /* vectors, consumed by dhcp client code */
+  u8 *hostname;
+  u8 *client_identifier;
+
+  /* Bytes containing requested option numbers */
+  u8 *option_55_data;
+
+  /* Information used for event callback */
+  u32 client_index;
+  u32 pid;
+  ip_dscp_t dscp;
+  dhcp_event_cb_t event_callback;
+} dhcp_client_add_del_args_t;
+
+extern dhcp_client_main_t dhcp_client_main;
+
+#define EVENT_DHCP_CLIENT_WAKEUP	1
+
+int dhcp_client_for_us (u32 bi0,
+			vlib_buffer_t * b0,
+			ip4_header_t * ip0,
+			udp_header_t * u0, dhcp_header_t * dh0);
+
+/**
+ * Add/Delete DHCP clients
+ */
+extern int dhcp_client_config (u32 is_add,
+			       u32 client_index,
+			       vlib_main_t * vm,
+			       u32 sw_if_index,
+			       u8 * hostname,
+			       u8 * client_id,
+			       dhcp_event_cb_t event_callback,
+			       u8 set_broadcast_flag,
+			       ip_dscp_t dscp, u32 pid);
+
+/**
+ * callback function for clients walking the DHCP client configurations
+ *
+ * @param client The client being visitsed
+ * @param data   The data passed during the call to 'walk'
+ * @return !0 to continue walking 0 to stop.
+ */
+typedef int (*dhcp_client_walk_cb_t) (const dhcp_client_t * client,
+				      void *data);
+
+/**
+ * Walk (visit each) DHCP client configuration
+ *
+ * @param cb The callback function invoked as each client is visited
+ * @param ctx Context data passed back to the client in the invocation of
+ *             the callback.
+ */
+extern void dhcp_client_walk (dhcp_client_walk_cb_t cb, void *ctx);
+
+#endif /* included_dhcp_client_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */