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/**
* Copyright (C) 2012 Steven Barth <steven@midlink.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details.
*
*/
#pragma once
#include <libubox/ustream.h>
#define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
#define ALL_DHCPV6_SERVERS {{{0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x03}}}
#define DHCPV6_CLIENT_PORT 546
#define DHCPV6_SERVER_PORT 547
#define DHCPV6_MSG_SOLICIT 1
#define DHCPV6_MSG_ADVERTISE 2
#define DHCPV6_MSG_REQUEST 3
#define DHCPV6_MSG_CONFIRM 4
#define DHCPV6_MSG_RENEW 5
#define DHCPV6_MSG_REBIND 6
#define DHCPV6_MSG_REPLY 7
#define DHCPV6_MSG_RELEASE 8
#define DHCPV6_MSG_DECLINE 9
#define DHCPV6_MSG_RECONFIGURE 10
#define DHCPV6_MSG_INFORMATION_REQUEST 11
#define DHCPV6_MSG_RELAY_FORW 12
#define DHCPV6_MSG_RELAY_REPL 13
#define DHCPV6_OPT_CLIENTID 1
#define DHCPV6_OPT_SERVERID 2
#define DHCPV6_OPT_IA_NA 3
#define DHCPV6_OPT_IA_ADDR 5
#define DHCPV6_OPT_ORO 6
#define DHCPV6_OPT_STATUS 13
#define DHCPV6_OPT_RELAY_MSG 9
#define DHCPV6_OPT_AUTH 11
#define DHCPV6_OPT_USER_CLASS 15
#define DHCPV6_OPT_INTERFACE_ID 18
#define DHCPV6_OPT_RECONF_MSG 19
#define DHCPV6_OPT_RECONF_ACCEPT 20
#define DHCPV6_OPT_DNS_SERVERS 23
#define DHCPV6_OPT_DNS_DOMAIN 24
#define DHCPV6_OPT_IA_PD 25
#define DHCPV6_OPT_IA_PREFIX 26
#define DHCPV6_OPT_INFO_REFRESH 32
#define DHCPV6_OPT_FQDN 39
#define DHCPV6_OPT_SOL_MAX_RT 82
#ifdef EXT_PREFIX_CLASS
/* draft-bhandari-dhc-class-based-prefix, not yet standardized */
#define DHCPV6_OPT_PREFIX_CLASS EXT_PREFIX_CLASS
#endif
#define DHCPV6_DUID_VENDOR 2
#define DHCPV6_STATUS_OK 0
#define DHCPV6_STATUS_NOADDRSAVAIL 2
#define DHCPV6_STATUS_NOBINDING 3
#define DHCPV6_STATUS_NOTONLINK 4
#define DHCPV6_STATUS_NOPREFIXAVAIL 6
// I just remembered I have an old one lying around...
#define DHCPV6_ENT_NO 30462
#define DHCPV6_ENT_TYPE 1
#define DHCPV6_HOP_COUNT_LIMIT 32
struct dhcpv6_client_header {
uint8_t msg_type;
uint8_t transaction_id[3];
} __attribute__((packed));
struct dhcpv6_relay_header {
uint8_t msg_type;
uint8_t hop_count;
struct in6_addr link_address;
struct in6_addr peer_address;
uint8_t options[];
} __attribute__((packed));
struct dhcpv6_relay_forward_envelope {
uint8_t msg_type;
uint8_t hop_count;
struct in6_addr link_address;
struct in6_addr peer_address;
uint16_t interface_id_type;
uint16_t interface_id_len;
uint32_t interface_id_data;
uint16_t relay_message_type;
uint16_t relay_message_len;
} __attribute__((packed));
struct dhcpv6_auth_reconfigure {
uint16_t type;
uint16_t len;
uint8_t protocol;
uint8_t algorithm;
uint8_t rdm;
uint32_t replay[2];
uint8_t reconf_type;
uint8_t key[16];
} _packed;
struct dhcpv6_ia_hdr {
uint16_t type;
uint16_t len;
uint32_t iaid;
uint32_t t1;
uint32_t t2;
} _packed;
struct dhcpv6_ia_prefix {
uint16_t type;
uint16_t len;
uint32_t preferred;
uint32_t valid;
uint8_t prefix;
struct in6_addr addr;
} _packed;
struct dhcpv6_ia_addr {
uint16_t type;
uint16_t len;
struct in6_addr addr;
uint32_t preferred;
uint32_t valid;
} _packed;
struct dhcpv6_assignment {
struct list_head head;
struct sockaddr_in6 peer;
time_t valid_until;
time_t reconf_sent;
bool all_class;
uint8_t classes_cnt;
uint16_t *classes;
int reconf_cnt;
char *hostname;
uint8_t key[16];
uint32_t assigned;
uint32_t iaid;
uint8_t mac[6];
uint8_t length; // length == 128 -> IA_NA, length <= 64 -> IA_PD
bool accept_reconf;
struct odhcpd_ipaddr *managed;
ssize_t managed_size;
struct ustream_fd managed_sock;
uint8_t clid_len;
uint8_t clid_data[];
};
#define dhcpv6_for_each_option(start, end, otype, olen, odata)\
for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (end) &&\
((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
((olen) = _o[2] << 8 | _o[3]) + (odata) <= (end); \
_o += 4 + (_o[2] << 8 | _o[3]))
int dhcpv6_init_ia(struct interface *iface, int socket);
size_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
const struct sockaddr_in6 *addr, const void *data, const uint8_t *end);
int dhcpv6_ia_init(void);
int setup_dhcpv6_ia_interface(struct interface *iface, bool enable);
void dhcpv6_write_statefile(void);
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