/* * 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 <vnet/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 */ u32 lease_renewal_interval; /* option 51 */ u32 lease_lifetime; /* option 59 */ /* Requested data (option 55) */ u8 *option_55_data; u8 *l2_rewrite; /* 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; 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; 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, 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: */