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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2020 Roy Marples <roy@marples.name>
* All rights reserved
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef DHCP6_H
#define DHCP6_H
#include "dhcpcd.h"
#define IN6ADDR_LINKLOCAL_ALLDHCP_INIT \
{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02 }}}
/* UDP port numbers for DHCP */
#define DHCP6_CLIENT_PORT 546
#define DHCP6_SERVER_PORT 547
/* DHCP message type */
#define DHCP6_SOLICIT 1
#define DHCP6_ADVERTISE 2
#define DHCP6_REQUEST 3
#define DHCP6_CONFIRM 4
#define DHCP6_RENEW 5
#define DHCP6_REBIND 6
#define DHCP6_REPLY 7
#define DHCP6_RELEASE 8
#define DHCP6_DECLINE 9
#define DHCP6_RECONFIGURE 10
#define DHCP6_INFORMATION_REQ 11
#define DHCP6_RELAY_FLOW 12
#define DHCP6_RELAY_REPL 13
#define DHCP6_RECONFIGURE_REQ 18
#define DHCP6_RECONFIGURE_REPLY 19
#ifdef DHCP6
#define D6_OPTION_CLIENTID 1
#define D6_OPTION_SERVERID 2
#define D6_OPTION_IA_NA 3
#define D6_OPTION_IA_TA 4
#define D6_OPTION_ORO 6
#define D6_OPTION_IA_ADDR 5
#define D6_OPTION_PREFERENCE 7
#define D6_OPTION_ELAPSED 8
#define D6_OPTION_AUTH 11
#define D6_OPTION_UNICAST 12
#define D6_OPTION_STATUS_CODE 13
#define D6_OPTION_RAPID_COMMIT 14
#define D6_OPTION_USER_CLASS 15
#define D6_OPTION_VENDOR_CLASS 16
#define D6_OPTION_VENDOR_OPTS 17
#define D6_OPTION_INTERFACE_ID 18
#define D6_OPTION_RECONF_MSG 19
#define D6_OPTION_RECONF_ACCEPT 20
#define D6_OPTION_SIP_SERVERS_NAME 21
#define D6_OPTION_SIP_SERVERS_ADDRESS 22
#define D6_OPTION_DNS_SERVERS 23
#define D6_OPTION_DOMAIN_LIST 24
#define D6_OPTION_IA_PD 25
#define D6_OPTION_IAPREFIX 26
#define D6_OPTION_NIS_SERVERS 27
#define D6_OPTION_NISP_SERVERS 28
#define D6_OPTION_NIS_DOMAIN_NAME 29
#define D6_OPTION_NISP_DOMAIN_NAME 30
#define D6_OPTION_SNTP_SERVERS 31
#define D6_OPTION_INFO_REFRESH_TIME 32
#define D6_OPTION_BCMS_SERVER_D 33
#define D6_OPTION_BCMS_SERVER_A 34
#define D6_OPTION_FQDN 39
#define D6_OPTION_POSIX_TIMEZONE 41
#define D6_OPTION_TZDB_TIMEZONE 42
#define D6_OPTION_PD_EXCLUDE 67
#define D6_OPTION_SOL_MAX_RT 82
#define D6_OPTION_INF_MAX_RT 83
#define D6_OPTION_MUDURL 112
#define D6_FQDN_PTR 0x00
#define D6_FQDN_BOTH 0x01
#define D6_FQDN_NONE 0x04
#include "dhcp.h"
#include "ipv6.h"
#define D6_STATUS_OK 0
#define D6_STATUS_FAIL 1
#define D6_STATUS_NOADDR 2
#define D6_STATUS_NOBINDING 3
#define D6_STATUS_NOTONLINK 4
#define D6_STATUS_USEMULTICAST 5
#define SOL_MAX_DELAY 1
#define SOL_TIMEOUT 1
#define SOL_MAX_RT 3600 /* RFC7083 */
#define SOL_MAX_RC 0
#define REQ_MAX_DELAY 0
#define REQ_TIMEOUT 1
#define REQ_MAX_RT 30
#define REQ_MAX_RC 10
#define CNF_MAX_DELAY 1
#define CNF_TIMEOUT 1
#define CNF_MAX_RT 4
#define CNF_MAX_RC 0
#define CNF_MAX_RD 10
#define REN_MAX_DELAY 0
#define REN_TIMEOUT 10
#define REN_MAX_RT 600
#define REB_MAX_DELAY 0
#define REB_TIMEOUT 10
#define REB_MAX_RT 600
#define INF_MAX_DELAY 1
#define INF_TIMEOUT 1
#define INF_MAX_RD CNF_MAX_RD /* NOT RFC defined */
#define INF_MAX_RT 3600 /* RFC7083 */
#define REL_MAX_DELAY 0
#define REL_TIMEOUT 1
#define REL_MAX_RT 0
#define REL_MAX_RC 5
#define DEC_MAX_DELAY 0
#define DEC_TIMEOUT 1
#define DEC_MAX_RC 5
#define REC_MAX_DELAY 0
#define REC_TIMEOUT 2
#define REC_MAX_RC 8
#define HOP_COUNT_LIMIT 32
/* RFC4242 3.1 */
#define IRT_DEFAULT 86400
#define IRT_MINIMUM 600
/* These should give -.1 to .1 randomness */
#define DHCP6_RAND_MIN -100
#define DHCP6_RAND_MAX 100
#define DHCP6_RAND_DIV 1000.0f
enum DH6S {
DH6S_INIT,
DH6S_DISCOVER,
DH6S_REQUEST,
DH6S_BOUND,
DH6S_RENEW,
DH6S_REBIND,
DH6S_CONFIRM,
DH6S_INFORM,
DH6S_INFORMED,
DH6S_RENEW_REQUESTED,
DH6S_PROBE,
DH6S_DECLINE,
DH6S_DELEGATED,
DH6S_RELEASE,
DH6S_RELEASED,
};
struct dhcp6_state {
enum DH6S state;
struct timespec started;
/* Message retransmission timings in seconds */
unsigned int IMD;
unsigned int RTC;
unsigned int IRT;
unsigned int MRC;
unsigned int MRT;
void (*MRCcallback)(void *);
unsigned int sol_max_rt;
unsigned int inf_max_rt;
unsigned int RT; /* retransmission timer in milliseconds
* maximal RT is 1 day + RAND,
* so should be enough */
struct dhcp6_message *send;
size_t send_len;
struct dhcp6_message *recv;
size_t recv_len;
struct dhcp6_message *new;
size_t new_len;
struct dhcp6_message *old;
size_t old_len;
struct timespec acquired;
uint32_t renew;
uint32_t rebind;
uint32_t expire;
struct in6_addr unicast;
struct ipv6_addrhead addrs;
uint32_t lowpl;
/* The +3 is for the possible .pd extension for prefix delegation */
char leasefile[sizeof(LEASEFILE6) + IF_NAMESIZE + (IF_SSIDLEN * 4) +3];
const char *reason;
uint16_t lerror; /* Last error received from DHCPv6 reply. */
bool has_no_binding;
bool failed; /* Entered the failed state - used to rate limit log. */
#ifdef AUTH
struct authstate auth;
#endif
};
#define D6_STATE(ifp) \
((struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6])
#define D6_CSTATE(ifp) \
((const struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6])
#define D6_STATE_RUNNING(ifp) \
(D6_CSTATE((ifp)) && \
D6_CSTATE((ifp))->reason && dhcp6_dadcompleted((ifp)))
int dhcp6_openudp(unsigned int, struct in6_addr *);
void dhcp6_recvmsg(struct dhcpcd_ctx *, struct msghdr *, struct ipv6_addr *);
void dhcp6_printoptions(const struct dhcpcd_ctx *,
const struct dhcp_opt *, size_t);
const struct ipv6_addr *dhcp6_iffindaddr(const struct interface *ifp,
const struct in6_addr *addr, unsigned int flags);
struct ipv6_addr *dhcp6_findaddr(struct dhcpcd_ctx *, const struct in6_addr *,
unsigned int);
size_t dhcp6_find_delegates(struct interface *);
int dhcp6_start(struct interface *, enum DH6S);
void dhcp6_reboot(struct interface *);
void dhcp6_renew(struct interface *);
ssize_t dhcp6_env(FILE *, const char *, const struct interface *,
const struct dhcp6_message *, size_t);
void dhcp6_free(struct interface *);
void dhcp6_handleifa(int, struct ipv6_addr *, pid_t);
int dhcp6_dadcompleted(const struct interface *);
void dhcp6_abort(struct interface *);
void dhcp6_drop(struct interface *, const char *);
#endif /* DHCP6 */
#endif /* DHCP6_H */
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