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#ifndef included_vnet_dhcp_packet_h
#define included_vnet_dhcp_packet_h
/*
* DHCP packet format
*
* 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/ip/ip6_packet.h>
// #define DHCP_VRF_NAME_MAX_LEN L3VM_MAX_NAME_STR_LEN
// #define DHCPV6_MAX_VRF_NAME_LEN L3VM_MAX_NAME_STR_LEN
#define DHCP_MAX_RELAY_ADDR 16
#define PROTO_UDP 17
#define DHCPV6_CLIENT_PORT 546
#define DHCPV6_SERVER_PORT 547
#define HOP_COUNT_LIMIT 32
#define DHCPV6_CISCO_ENT_NUM 9
/*
* DHCPv6 message types
*/
typedef enum dhcpv6_msg_type_{
DHCPV6_MSG_SOLICIT = 1,
DHCPV6_MSG_ADVERTISE = 2,
DHCPV6_MSG_REQUEST = 3,
DHCPV6_MSG_CONFIRM = 4,
DHCPV6_MSG_RENEW = 5,
DHCPV6_MSG_REBIND = 6,
DHCPV6_MSG_REPLY = 7,
DHCPV6_MSG_RELEASE = 8,
DHCPV6_MSG_DECLINE = 9,
DHCPV6_MSG_RECONFIGURE = 10,
DHCPV6_MSG_INFORMATION_REQUEST = 11,
DHCPV6_MSG_RELAY_FORW = 12,
DHCPV6_MSG_RELAY_REPL = 13,
} dhcpv6_msg_type_t;
/*
* DHCPv6 options types
*/
enum {
DHCPV6_OPTION_CLIENTID = 1,
DHCPV6_OPTION_SERVERID = 2,
DHCPV6_OPTION_IA_NA = 3,
DHCPV6_OPTION_IA_TA = 4,
DHCPV6_OPTION_IAADDR = 5,
DHCPV6_OPTION_ORO = 6,
DHCPV6_OPTION_PREFERENCE = 7,
DHCPV6_OPTION_ELAPSED_TIME = 8,
DHCPV6_OPTION_RELAY_MSG = 9,
DHCPV6_OPTION_AUTH = 11,
DHCPV6_OPTION_UNICAST = 12,
DHCPV6_OPTION_STATUS_CODE = 13,
DHCPV6_OPTION_RAPID_COMMIT = 14,
DHCPV6_OPTION_USER_CLASS = 15,
DHCPV6_OPTION_VENDOR_CLASS = 16,
DHCPV6_OPTION_VENDOR_OPTS = 17,
DHCPV6_OPTION_INTERFACE_ID = 18, // relay agent fills this
DHCPV6_OPTION_RECONF_MSG = 19,
DHCPV6_OPTION_RECONF_ACCEPT = 20,
DHCPV6_OPTION_REMOTEID = 37, // relay agent fills this
DHCPV6_OPTION_VSS = 68, // relay agent fills this
DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS = 79,
DHCPV6_OPTION_MAX
};
/*
* DHCPv6 status codes
*/
enum {
DHCPV6_STATUS_SUCCESS = 0,
DHCPV6_STATUS_UNSPEC_FAIL = 1,
DHCPV6_STATUS_NOADDRS_AVAIL = 2,
DHCPV6_STATUS_NO_BINDING = 3,
DHCPV6_STATUS_NOT_ONLINK = 4,
DHCPV6_STATUS_USE_MULTICAST = 5,
};
/*
* DHCPv6 DUID types
*/
enum {
DHCPV6_DUID_LLT = 1, /* DUID Based on Link-layer Address Plus Time */
DHCPV6_DUID_EN = 2, /* DUID Based on Enterprise Number */
DHCPV6_DUID_LL = 3, /* DUID Based on Link-layer Address */
};
//Structure for DHCPv6 payload from client
typedef struct dhcpv6_hdr_ {
union {
u8 msg_type; //DHCP msg type
u32 xid; // transaction id
}u;
u8 data[0];
} dhcpv6_header_t;
typedef CLIB_PACKED (struct dhcpv6_relay_ctx_ {
dhcpv6_header_t *pkt;
u32 pkt_len;
u32 dhcpv6_len; //DHCPv6 payload load
// if_ordinal iod;
u32 if_index;
u32 ctx_id;
char ctx_name[32+1];
u8 dhcp_msg_type;
}) dhcpv6_relay_ctx_t;
//Structure for DHCPv6 RELAY-FORWARD and DHCPv6 RELAY-REPLY pkts
typedef CLIB_PACKED (struct dhcpv6_relay_hdr_ {
u8 msg_type;
u8 hop_count;
ip6_address_t link_addr;
ip6_address_t peer_addr;
u8 data[0];
}) dhcpv6_relay_hdr_t;
typedef enum dhcp_stats_action_type_ {
DHCP_STATS_ACTION_FORWARDED=1,
DHCP_STATS_ACTION_RECEIVED,
DHCP_STATS_ACTION_DROPPED
} dhcp_stats_action_type_t;
//Generic counters for a packet
typedef struct dhcp_stats_counters_ {
u64 rx_pkts; //counter for received pkts
u64 tx_pkts; //counter for forwarded pkts
u64 drops; //counter for dropped pkts
} dhcp_stats_counters_t;
typedef enum dhcpv6_stats_drop_reason_ {
DHCPV6_RELAY_PKT_DROP_RELAYDISABLE = 1,
DHCPV6_RELAY_PKT_DROP_MAX_HOPS,
DHCPV6_RELAY_PKT_DROP_VALIDATION_FAIL,
DHCPV6_RELAY_PKT_DROP_UNKNOWN_OP_INTF,
DHCPV6_RELAY_PKT_DROP_BAD_CONTEXT,
DHCPV6_RELAY_PKT_DROP_OPT_INSERT_FAIL,
DHCPV6_RELAY_PKT_DROP_REPLY_FROM_CLIENT,
} dhcpv6_stats_drop_reason_t;
typedef CLIB_PACKED (struct {
u16 option;
u16 length;
u8 data[0];
}) dhcpv6_option_t;
typedef CLIB_PACKED (struct {
dhcpv6_option_t opt;
u32 int_idx;
}) dhcpv6_int_id_t;
typedef CLIB_PACKED (struct {
dhcpv6_option_t opt;
u8 data[8]; // data[0]:type, data[1..7]: VPN ID
}) dhcpv6_vss_t;
typedef CLIB_PACKED (struct {
dhcpv6_option_t opt;
u32 ent_num;
u32 rmt_id;
}) dhcpv6_rmt_id_t;
typedef CLIB_PACKED (struct {
dhcpv6_option_t opt;
u16 link_type;
u8 data[6]; // data[0]:data[5]: MAC address
}) dhcpv6_client_mac_t;
#endif /* included_vnet_dhcp_packet_h */
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