dhcp6.h - platform/external/dhcpcd-6.8.2 - Git at Google

 /*
  * dhcpcd - DHCP client daemon
  * Copyright (c) 2006-2015 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

 #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_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_FQDN_PTR	0x00
 #define D6_FQDN_BOTH	0x01
 #define D6_FQDN_NONE	0x04

 #include "dhcp.h"
 #include "ipv6.h"

 struct dhcp6_message {
 	uint8_t type;
 	uint8_t xid[3];
 	/* followed by options */
 } __packed;

 struct dhcp6_option {
 	uint16_t code;
 	uint16_t len;
 	/* followed by data */
 } __packed;

 #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 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_RD		10
 #define REN_TIMEOUT		10
 #define REN_MAX_RT		600
 #define REB_TIMEOUT		10
 #define REB_MAX_RT		600
 #define INF_MAX_DELAY		1
 #define INF_TIMEOUT		1
 #define INF_MAX_RT		3600 /* RFC7083 */
 #define REL_TIMEOUT		1
 #define REL_MAX_RC		5
 #define DEC_TIMEOUT		1
 #define DEC_MAX_RC		5
 #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

 #define DHCP6_RAND_MIN		-100
 #define DHCP6_RAND_MAX		100

 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_DELEGATED,
 	DH6S_RELEASE
 };

 struct dhcp6_state {
 	enum DH6S state;
 	time_t start_uptime;

 	/* Message retransmission timings */
 	struct timespec RT;
 	unsigned int IMD;
 	unsigned int RTC;
 	time_t IRT;
 	unsigned int MRC;
 	time_t MRT;
 	void (*MRCcallback)(void *);
 	time_t sol_max_rt;
 	time_t inf_max_rt;

 	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;

 	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_SSIDSIZE * 4) +3];
 	const char *reason;

 	struct authstate auth;
 };

 #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)))

 #define D6_FIRST_OPTION(m)						       \
     ((struct dhcp6_option *)						       \
         ((uint8_t *)(m) + sizeof(struct dhcp6_message)))
 #define D6_NEXT_OPTION(o)						       \
     ((struct dhcp6_option *)						       \
         (((uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len)))
 #define D6_OPTION_DATA(o)						       \
     ((uint8_t *)(o) + sizeof(struct dhcp6_option))
 #define D6_CFIRST_OPTION(m)						       \
     ((const struct dhcp6_option *)					       \
         ((const uint8_t *)(m) + sizeof(struct dhcp6_message)))
 #define D6_CNEXT_OPTION(o)						       \
     ((const struct dhcp6_option *)					       \
         (((const uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len)))
 #define D6_COPTION_DATA(o)						       \
     ((const uint8_t *)(o) + sizeof(struct dhcp6_option))

 #ifdef INET6
 void dhcp6_printoptions(const struct dhcpcd_ctx *,
     const struct dhcp_opt *, size_t);
 struct ipv6_addr *dhcp6_findaddr(struct dhcpcd_ctx *, const struct in6_addr *,
     short);
 size_t dhcp6_find_delegates(struct interface *);
 int dhcp6_has_public_addr(const struct interface *);
 int dhcp6_start(struct interface *, enum DH6S);
 void dhcp6_reboot(struct interface *);
 ssize_t dhcp6_env(char **, const char *, const struct interface *,
     const struct dhcp6_message *, size_t);
 void dhcp6_free(struct interface *);
 void dhcp6_handleifa(struct dhcpcd_ctx *, int, const char *,
     const struct in6_addr *addr, int);
 int dhcp6_dadcompleted(const struct interface *);
 void dhcp6_drop(struct interface *, const char *);
 int dhcp6_dump(struct interface *);
 #else
 #define dhcp6_findaddr(a, b, c) (0)
 #define dhcp6_find_delegates(a) {}
 #define dhcp6_start(a, b) (0)
 #define dhcp6_reboot(a) {}
 #define dhcp6_env(a, b, c, d, e) {}
 #define dhcp6_free(a) {}
 #define dhcp6_dadcompleted(a) (0)
 #define dhcp6_drop(a, b) {}
 #define dhcp6_dump(a) (-1)
 #endif

 #endif
	/*
	* dhcpcd - DHCP client daemon
	* Copyright (c) 2006-2015 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

	#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_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_FQDN_PTR 0x00
	#define D6_FQDN_BOTH 0x01
	#define D6_FQDN_NONE 0x04

	#include "dhcp.h"
	#include "ipv6.h"

	struct dhcp6_message {
	uint8_t type;
	uint8_t xid[3];
	/* followed by options */
	} __packed;

	struct dhcp6_option {
	uint16_t code;
	uint16_t len;
	/* followed by data */
	} __packed;

	#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 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_RD 10
	#define REN_TIMEOUT 10
	#define REN_MAX_RT 600
	#define REB_TIMEOUT 10
	#define REB_MAX_RT 600
	#define INF_MAX_DELAY 1
	#define INF_TIMEOUT 1
	#define INF_MAX_RT 3600 /* RFC7083 */
	#define REL_TIMEOUT 1
	#define REL_MAX_RC 5
	#define DEC_TIMEOUT 1
	#define DEC_MAX_RC 5
	#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

	#define DHCP6_RAND_MIN -100
	#define DHCP6_RAND_MAX 100

	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_DELEGATED,
	DH6S_RELEASE
	};

	struct dhcp6_state {
	enum DH6S state;
	time_t start_uptime;

	/* Message retransmission timings */
	struct timespec RT;
	unsigned int IMD;
	unsigned int RTC;
	time_t IRT;
	unsigned int MRC;
	time_t MRT;
	void (MRCcallback)(void );
	time_t sol_max_rt;
	time_t inf_max_rt;

	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;

	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_SSIDSIZE * 4) +3];
	const char *reason;

	struct authstate auth;
	};

	#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)))

	#define D6_FIRST_OPTION(m) \
	((struct dhcp6_option *) \
	((uint8_t *)(m) + sizeof(struct dhcp6_message)))
	#define D6_NEXT_OPTION(o) \
	((struct dhcp6_option *) \
	(((uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len)))
	#define D6_OPTION_DATA(o) \
	((uint8_t *)(o) + sizeof(struct dhcp6_option))
	#define D6_CFIRST_OPTION(m) \
	((const struct dhcp6_option *) \
	((const uint8_t *)(m) + sizeof(struct dhcp6_message)))
	#define D6_CNEXT_OPTION(o) \
	((const struct dhcp6_option *) \
	(((const uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len)))
	#define D6_COPTION_DATA(o) \
	((const uint8_t *)(o) + sizeof(struct dhcp6_option))

	#ifdef INET6
	void dhcp6_printoptions(const struct dhcpcd_ctx *,
	const struct dhcp_opt *, size_t);
	struct ipv6_addr dhcp6_findaddr(struct dhcpcd_ctx , const struct in6_addr *,
	short);
	size_t dhcp6_find_delegates(struct interface *);
	int dhcp6_has_public_addr(const struct interface *);
	int dhcp6_start(struct interface *, enum DH6S);
	void dhcp6_reboot(struct interface *);
	ssize_t dhcp6_env(char *, const char , const struct interface *,
	const struct dhcp6_message *, size_t);
	void dhcp6_free(struct interface *);
	void dhcp6_handleifa(struct dhcpcd_ctx , int, const char ,
	const struct in6_addr *addr, int);
	int dhcp6_dadcompleted(const struct interface *);
	void dhcp6_drop(struct interface , const char );
	int dhcp6_dump(struct interface *);
	#else
	#define dhcp6_findaddr(a, b, c) (0)
	#define dhcp6_find_delegates(a) {}
	#define dhcp6_start(a, b) (0)
	#define dhcp6_reboot(a) {}
	#define dhcp6_env(a, b, c, d, e) {}
	#define dhcp6_free(a) {}
	#define dhcp6_dadcompleted(a) (0)
	#define dhcp6_drop(a, b) {}
	#define dhcp6_dump(a) (-1)
	#endif

	#endif