tcpdump-4.3.0/bootp.h - nest-learning-thermostat/5.1.7/tcpdump - Git at Google

 /* @(#) $Header: /tcpdump/master/tcpdump/bootp.h,v 1.19 2008-04-22 09:46:03 hannes Exp $ (LBL) */
 /*
  * Bootstrap Protocol (BOOTP).  RFC951 and RFC1048.
  *
  * This file specifies the "implementation-independent" BOOTP protocol
  * information which is common to both client and server.
  *
  * Copyright 1988 by Carnegie Mellon.
  *
  * Permission to use, copy, modify, and distribute this program for any
  * purpose and without fee is hereby granted, provided that this copyright
  * and permission notice appear on all copies and supporting documentation,
  * the name of Carnegie Mellon not be used in advertising or publicity
  * pertaining to distribution of the program without specific prior
  * permission, and notice be given in supporting documentation that copying
  * and distribution is by permission of Carnegie Mellon and Stanford
  * University.  Carnegie Mellon makes no representations about the
  * suitability of this software for any purpose.  It is provided "as is"
  * without express or implied warranty.
  */


 struct bootp {
 	u_int8_t	bp_op;		/* packet opcode type */
 	u_int8_t	bp_htype;	/* hardware addr type */
 	u_int8_t	bp_hlen;	/* hardware addr length */
 	u_int8_t	bp_hops;	/* gateway hops */
 	u_int32_t	bp_xid;		/* transaction ID */
 	u_int16_t	bp_secs;	/* seconds since boot began */
 	u_int16_t	bp_flags;	/* flags - see bootp_flag_values[]
 					   in print-bootp.c */
 	struct in_addr	bp_ciaddr;	/* client IP address */
 	struct in_addr	bp_yiaddr;	/* 'your' IP address */
 	struct in_addr	bp_siaddr;	/* server IP address */
 	struct in_addr	bp_giaddr;	/* gateway IP address */
 	u_int8_t	bp_chaddr[16];	/* client hardware address */
 	u_int8_t	bp_sname[64];	/* server host name */
 	u_int8_t	bp_file[128];	/* boot file name */
 	u_int8_t	bp_vend[64];	/* vendor-specific area */
 } UNALIGNED;

 /*
  * UDP port numbers, server and client.
  */
 #define	IPPORT_BOOTPS		67
 #define	IPPORT_BOOTPC		68

 #define BOOTPREPLY		2
 #define BOOTPREQUEST		1

 /*
  * Vendor magic cookie (v_magic) for CMU
  */
 #define VM_CMU		"CMU"

 /*
  * Vendor magic cookie (v_magic) for RFC1048
  */
 #define VM_RFC1048	{ 99, 130, 83, 99 }


 /*
  * RFC1048 tag values used to specify what information is being supplied in
  * the vendor field of the packet.
  */

 #define TAG_PAD			((u_int8_t)   0)
 #define TAG_SUBNET_MASK		((u_int8_t)   1)
 #define TAG_TIME_OFFSET		((u_int8_t)   2)
 #define TAG_GATEWAY		((u_int8_t)   3)
 #define TAG_TIME_SERVER		((u_int8_t)   4)
 #define TAG_NAME_SERVER		((u_int8_t)   5)
 #define TAG_DOMAIN_SERVER	((u_int8_t)   6)
 #define TAG_LOG_SERVER		((u_int8_t)   7)
 #define TAG_COOKIE_SERVER	((u_int8_t)   8)
 #define TAG_LPR_SERVER		((u_int8_t)   9)
 #define TAG_IMPRESS_SERVER	((u_int8_t)  10)
 #define TAG_RLP_SERVER		((u_int8_t)  11)
 #define TAG_HOSTNAME		((u_int8_t)  12)
 #define TAG_BOOTSIZE		((u_int8_t)  13)
 #define TAG_END			((u_int8_t) 255)
 /* RFC1497 tags */
 #define	TAG_DUMPPATH		((u_int8_t)  14)
 #define	TAG_DOMAINNAME		((u_int8_t)  15)
 #define	TAG_SWAP_SERVER		((u_int8_t)  16)
 #define	TAG_ROOTPATH		((u_int8_t)  17)
 #define	TAG_EXTPATH		((u_int8_t)  18)
 /* RFC2132 */
 #define	TAG_IP_FORWARD		((u_int8_t)  19)
 #define	TAG_NL_SRCRT		((u_int8_t)  20)
 #define	TAG_PFILTERS		((u_int8_t)  21)
 #define	TAG_REASS_SIZE		((u_int8_t)  22)
 #define	TAG_DEF_TTL		((u_int8_t)  23)
 #define	TAG_MTU_TIMEOUT		((u_int8_t)  24)
 #define	TAG_MTU_TABLE		((u_int8_t)  25)
 #define	TAG_INT_MTU		((u_int8_t)  26)
 #define	TAG_LOCAL_SUBNETS	((u_int8_t)  27)
 #define	TAG_BROAD_ADDR		((u_int8_t)  28)
 #define	TAG_DO_MASK_DISC	((u_int8_t)  29)
 #define	TAG_SUPPLY_MASK		((u_int8_t)  30)
 #define	TAG_DO_RDISC		((u_int8_t)  31)
 #define	TAG_RTR_SOL_ADDR	((u_int8_t)  32)
 #define	TAG_STATIC_ROUTE	((u_int8_t)  33)
 #define	TAG_USE_TRAILERS	((u_int8_t)  34)
 #define	TAG_ARP_TIMEOUT		((u_int8_t)  35)
 #define	TAG_ETH_ENCAP		((u_int8_t)  36)
 #define	TAG_TCP_TTL		((u_int8_t)  37)
 #define	TAG_TCP_KEEPALIVE	((u_int8_t)  38)
 #define	TAG_KEEPALIVE_GO	((u_int8_t)  39)
 #define	TAG_NIS_DOMAIN		((u_int8_t)  40)
 #define	TAG_NIS_SERVERS		((u_int8_t)  41)
 #define	TAG_NTP_SERVERS		((u_int8_t)  42)
 #define	TAG_VENDOR_OPTS		((u_int8_t)  43)
 #define	TAG_NETBIOS_NS		((u_int8_t)  44)
 #define	TAG_NETBIOS_DDS		((u_int8_t)  45)
 #define	TAG_NETBIOS_NODE	((u_int8_t)  46)
 #define	TAG_NETBIOS_SCOPE	((u_int8_t)  47)
 #define	TAG_XWIN_FS		((u_int8_t)  48)
 #define	TAG_XWIN_DM		((u_int8_t)  49)
 #define	TAG_NIS_P_DOMAIN	((u_int8_t)  64)
 #define	TAG_NIS_P_SERVERS	((u_int8_t)  65)
 #define	TAG_MOBILE_HOME		((u_int8_t)  68)
 #define	TAG_SMPT_SERVER		((u_int8_t)  69)
 #define	TAG_POP3_SERVER		((u_int8_t)  70)
 #define	TAG_NNTP_SERVER		((u_int8_t)  71)
 #define	TAG_WWW_SERVER		((u_int8_t)  72)
 #define	TAG_FINGER_SERVER	((u_int8_t)  73)
 #define	TAG_IRC_SERVER		((u_int8_t)  74)
 #define	TAG_STREETTALK_SRVR	((u_int8_t)  75)
 #define	TAG_STREETTALK_STDA	((u_int8_t)  76)
 /* DHCP options */
 #define	TAG_REQUESTED_IP	((u_int8_t)  50)
 #define	TAG_IP_LEASE		((u_int8_t)  51)
 #define	TAG_OPT_OVERLOAD	((u_int8_t)  52)
 #define	TAG_TFTP_SERVER		((u_int8_t)  66)
 #define	TAG_BOOTFILENAME	((u_int8_t)  67)
 #define	TAG_DHCP_MESSAGE	((u_int8_t)  53)
 #define	TAG_SERVER_ID		((u_int8_t)  54)
 #define	TAG_PARM_REQUEST	((u_int8_t)  55)
 #define	TAG_MESSAGE		((u_int8_t)  56)
 #define	TAG_MAX_MSG_SIZE	((u_int8_t)  57)
 #define	TAG_RENEWAL_TIME	((u_int8_t)  58)
 #define	TAG_REBIND_TIME		((u_int8_t)  59)
 #define	TAG_VENDOR_CLASS	((u_int8_t)  60)
 #define	TAG_CLIENT_ID		((u_int8_t)  61)
 /* RFC 2241 */
 #define	TAG_NDS_SERVERS		((u_int8_t)  85)
 #define	TAG_NDS_TREE_NAME	((u_int8_t)  86)
 #define	TAG_NDS_CONTEXT		((u_int8_t)  87)
 /* RFC 2242 */
 #define	TAG_NDS_IPDOMAIN	((u_int8_t)  62)
 #define	TAG_NDS_IPINFO		((u_int8_t)  63)
 /* RFC 2485 */
 #define	TAG_OPEN_GROUP_UAP	((u_int8_t)  98)
 /* RFC 2563 */
 #define	TAG_DISABLE_AUTOCONF	((u_int8_t) 116)
 /* RFC 2610 */
 #define	TAG_SLP_DA		((u_int8_t)  78)
 #define	TAG_SLP_SCOPE		((u_int8_t)  79)
 /* RFC 2937 */
 #define	TAG_NS_SEARCH		((u_int8_t) 117)
 /* RFC 3011 */
 #define	TAG_IP4_SUBNET_SELECT	((u_int8_t) 118)
 /* RFC 3442 */
 #define TAG_CLASSLESS_STATIC_RT	((u_int8_t) 121)
 #define TAG_CLASSLESS_STA_RT_MS	((u_int8_t) 249)
 /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
 #define	TAG_USER_CLASS		((u_int8_t)  77)
 #define	TAG_SLP_NAMING_AUTH	((u_int8_t)  80)
 #define	TAG_CLIENT_FQDN		((u_int8_t)  81)
 #define	TAG_AGENT_CIRCUIT	((u_int8_t)  82)
 #define	TAG_AGENT_REMOTE	((u_int8_t)  83)
 #define	TAG_AGENT_MASK		((u_int8_t)  84)
 #define	TAG_TZ_STRING		((u_int8_t)  88)
 #define	TAG_FQDN_OPTION		((u_int8_t)  89)
 #define	TAG_AUTH		((u_int8_t)  90)
 #define	TAG_VINES_SERVERS	((u_int8_t)  91)
 #define	TAG_SERVER_RANK		((u_int8_t)  92)
 #define	TAG_CLIENT_ARCH		((u_int8_t)  93)
 #define	TAG_CLIENT_NDI		((u_int8_t)  94)
 #define	TAG_CLIENT_GUID		((u_int8_t)  97)
 #define	TAG_LDAP_URL		((u_int8_t)  95)
 #define	TAG_6OVER4		((u_int8_t)  96)
 #define	TAG_PRINTER_NAME	((u_int8_t) 100)
 #define	TAG_MDHCP_SERVER	((u_int8_t) 101)
 #define	TAG_IPX_COMPAT		((u_int8_t) 110)
 #define	TAG_NETINFO_PARENT	((u_int8_t) 112)
 #define	TAG_NETINFO_PARENT_TAG	((u_int8_t) 113)
 #define	TAG_URL			((u_int8_t) 114)
 #define	TAG_FAILOVER		((u_int8_t) 115)
 #define	TAG_EXTENDED_REQUEST	((u_int8_t) 126)
 #define	TAG_EXTENDED_OPTION	((u_int8_t) 127)


 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
 #define		DHCPDISCOVER	1
 #define		DHCPOFFER	2
 #define		DHCPREQUEST	3
 #define		DHCPDECLINE	4
 #define		DHCPACK		5
 #define		DHCPNAK		6
 #define		DHCPRELEASE	7
 #define		DHCPINFORM	8


 /*
  * "vendor" data permitted for CMU bootp clients.
  */

 struct cmu_vend {
 	u_int8_t	v_magic[4];	/* magic number */
 	u_int32_t	v_flags;	/* flags/opcodes, etc. */
 	struct in_addr	v_smask;	/* Subnet mask */
 	struct in_addr	v_dgate;	/* Default gateway */
 	struct in_addr	v_dns1, v_dns2; /* Domain name servers */
 	struct in_addr	v_ins1, v_ins2; /* IEN-116 name servers */
 	struct in_addr	v_ts1, v_ts2;	/* Time servers */
 	u_int8_t	v_unused[24];	/* currently unused */
 } UNALIGNED;


 /* v_flags values */
 #define VF_SMASK	1	/* Subnet mask field contains valid data */

 /* RFC 4702 DHCP Client FQDN Option */

 #define CLIENT_FQDN_FLAGS_S	0x01
 #define CLIENT_FQDN_FLAGS_O	0x02
 #define CLIENT_FQDN_FLAGS_E	0x04
 #define CLIENT_FQDN_FLAGS_N	0x08
	/* @(#) $Header: /tcpdump/master/tcpdump/bootp.h,v 1.19 2008-04-22 09:46:03 hannes Exp $ (LBL) */
	/*
	* Bootstrap Protocol (BOOTP). RFC951 and RFC1048.
	*
	* This file specifies the "implementation-independent" BOOTP protocol
	* information which is common to both client and server.
	*
	* Copyright 1988 by Carnegie Mellon.
	*
	* Permission to use, copy, modify, and distribute this program for any
	* purpose and without fee is hereby granted, provided that this copyright
	* and permission notice appear on all copies and supporting documentation,
	* the name of Carnegie Mellon not be used in advertising or publicity
	* pertaining to distribution of the program without specific prior
	* permission, and notice be given in supporting documentation that copying
	* and distribution is by permission of Carnegie Mellon and Stanford
	* University. Carnegie Mellon makes no representations about the
	* suitability of this software for any purpose. It is provided "as is"
	* without express or implied warranty.
	*/


	struct bootp {
	u_int8_t bp_op; /* packet opcode type */
	u_int8_t bp_htype; /* hardware addr type */
	u_int8_t bp_hlen; /* hardware addr length */
	u_int8_t bp_hops; /* gateway hops */
	u_int32_t bp_xid; /* transaction ID */
	u_int16_t bp_secs; /* seconds since boot began */
	u_int16_t bp_flags; /* flags - see bootp_flag_values[]
	in print-bootp.c */
	struct in_addr bp_ciaddr; /* client IP address */
	struct in_addr bp_yiaddr; /* 'your' IP address */
	struct in_addr bp_siaddr; /* server IP address */
	struct in_addr bp_giaddr; /* gateway IP address */
	u_int8_t bp_chaddr[16]; /* client hardware address */
	u_int8_t bp_sname[64]; /* server host name */
	u_int8_t bp_file[128]; /* boot file name */
	u_int8_t bp_vend[64]; /* vendor-specific area */
	} UNALIGNED;

	/*
	* UDP port numbers, server and client.
	*/
	#define IPPORT_BOOTPS 67
	#define IPPORT_BOOTPC 68

	#define BOOTPREPLY 2
	#define BOOTPREQUEST 1

	/*
	* Vendor magic cookie (v_magic) for CMU
	*/
	#define VM_CMU "CMU"

	/*
	* Vendor magic cookie (v_magic) for RFC1048
	*/
	#define VM_RFC1048 { 99, 130, 83, 99 }



	/*
	* RFC1048 tag values used to specify what information is being supplied in
	* the vendor field of the packet.
	*/

	#define TAG_PAD ((u_int8_t) 0)
	#define TAG_SUBNET_MASK ((u_int8_t) 1)
	#define TAG_TIME_OFFSET ((u_int8_t) 2)
	#define TAG_GATEWAY ((u_int8_t) 3)
	#define TAG_TIME_SERVER ((u_int8_t) 4)
	#define TAG_NAME_SERVER ((u_int8_t) 5)
	#define TAG_DOMAIN_SERVER ((u_int8_t) 6)
	#define TAG_LOG_SERVER ((u_int8_t) 7)
	#define TAG_COOKIE_SERVER ((u_int8_t) 8)
	#define TAG_LPR_SERVER ((u_int8_t) 9)
	#define TAG_IMPRESS_SERVER ((u_int8_t) 10)
	#define TAG_RLP_SERVER ((u_int8_t) 11)
	#define TAG_HOSTNAME ((u_int8_t) 12)
	#define TAG_BOOTSIZE ((u_int8_t) 13)
	#define TAG_END ((u_int8_t) 255)
	/* RFC1497 tags */
	#define TAG_DUMPPATH ((u_int8_t) 14)
	#define TAG_DOMAINNAME ((u_int8_t) 15)
	#define TAG_SWAP_SERVER ((u_int8_t) 16)
	#define TAG_ROOTPATH ((u_int8_t) 17)
	#define TAG_EXTPATH ((u_int8_t) 18)
	/* RFC2132 */
	#define TAG_IP_FORWARD ((u_int8_t) 19)
	#define TAG_NL_SRCRT ((u_int8_t) 20)
	#define TAG_PFILTERS ((u_int8_t) 21)
	#define TAG_REASS_SIZE ((u_int8_t) 22)
	#define TAG_DEF_TTL ((u_int8_t) 23)
	#define TAG_MTU_TIMEOUT ((u_int8_t) 24)
	#define TAG_MTU_TABLE ((u_int8_t) 25)
	#define TAG_INT_MTU ((u_int8_t) 26)
	#define TAG_LOCAL_SUBNETS ((u_int8_t) 27)
	#define TAG_BROAD_ADDR ((u_int8_t) 28)
	#define TAG_DO_MASK_DISC ((u_int8_t) 29)
	#define TAG_SUPPLY_MASK ((u_int8_t) 30)
	#define TAG_DO_RDISC ((u_int8_t) 31)
	#define TAG_RTR_SOL_ADDR ((u_int8_t) 32)
	#define TAG_STATIC_ROUTE ((u_int8_t) 33)
	#define TAG_USE_TRAILERS ((u_int8_t) 34)
	#define TAG_ARP_TIMEOUT ((u_int8_t) 35)
	#define TAG_ETH_ENCAP ((u_int8_t) 36)
	#define TAG_TCP_TTL ((u_int8_t) 37)
	#define TAG_TCP_KEEPALIVE ((u_int8_t) 38)
	#define TAG_KEEPALIVE_GO ((u_int8_t) 39)
	#define TAG_NIS_DOMAIN ((u_int8_t) 40)
	#define TAG_NIS_SERVERS ((u_int8_t) 41)
	#define TAG_NTP_SERVERS ((u_int8_t) 42)
	#define TAG_VENDOR_OPTS ((u_int8_t) 43)
	#define TAG_NETBIOS_NS ((u_int8_t) 44)
	#define TAG_NETBIOS_DDS ((u_int8_t) 45)
	#define TAG_NETBIOS_NODE ((u_int8_t) 46)
	#define TAG_NETBIOS_SCOPE ((u_int8_t) 47)
	#define TAG_XWIN_FS ((u_int8_t) 48)
	#define TAG_XWIN_DM ((u_int8_t) 49)
	#define TAG_NIS_P_DOMAIN ((u_int8_t) 64)
	#define TAG_NIS_P_SERVERS ((u_int8_t) 65)
	#define TAG_MOBILE_HOME ((u_int8_t) 68)
	#define TAG_SMPT_SERVER ((u_int8_t) 69)
	#define TAG_POP3_SERVER ((u_int8_t) 70)
	#define TAG_NNTP_SERVER ((u_int8_t) 71)
	#define TAG_WWW_SERVER ((u_int8_t) 72)
	#define TAG_FINGER_SERVER ((u_int8_t) 73)
	#define TAG_IRC_SERVER ((u_int8_t) 74)
	#define TAG_STREETTALK_SRVR ((u_int8_t) 75)
	#define TAG_STREETTALK_STDA ((u_int8_t) 76)
	/* DHCP options */
	#define TAG_REQUESTED_IP ((u_int8_t) 50)
	#define TAG_IP_LEASE ((u_int8_t) 51)
	#define TAG_OPT_OVERLOAD ((u_int8_t) 52)
	#define TAG_TFTP_SERVER ((u_int8_t) 66)
	#define TAG_BOOTFILENAME ((u_int8_t) 67)
	#define TAG_DHCP_MESSAGE ((u_int8_t) 53)
	#define TAG_SERVER_ID ((u_int8_t) 54)
	#define TAG_PARM_REQUEST ((u_int8_t) 55)
	#define TAG_MESSAGE ((u_int8_t) 56)
	#define TAG_MAX_MSG_SIZE ((u_int8_t) 57)
	#define TAG_RENEWAL_TIME ((u_int8_t) 58)
	#define TAG_REBIND_TIME ((u_int8_t) 59)
	#define TAG_VENDOR_CLASS ((u_int8_t) 60)
	#define TAG_CLIENT_ID ((u_int8_t) 61)
	/* RFC 2241 */
	#define TAG_NDS_SERVERS ((u_int8_t) 85)
	#define TAG_NDS_TREE_NAME ((u_int8_t) 86)
	#define TAG_NDS_CONTEXT ((u_int8_t) 87)
	/* RFC 2242 */
	#define TAG_NDS_IPDOMAIN ((u_int8_t) 62)
	#define TAG_NDS_IPINFO ((u_int8_t) 63)
	/* RFC 2485 */
	#define TAG_OPEN_GROUP_UAP ((u_int8_t) 98)
	/* RFC 2563 */
	#define TAG_DISABLE_AUTOCONF ((u_int8_t) 116)
	/* RFC 2610 */
	#define TAG_SLP_DA ((u_int8_t) 78)
	#define TAG_SLP_SCOPE ((u_int8_t) 79)
	/* RFC 2937 */
	#define TAG_NS_SEARCH ((u_int8_t) 117)
	/* RFC 3011 */
	#define TAG_IP4_SUBNET_SELECT ((u_int8_t) 118)
	/* RFC 3442 */
	#define TAG_CLASSLESS_STATIC_RT ((u_int8_t) 121)
	#define TAG_CLASSLESS_STA_RT_MS ((u_int8_t) 249)
	/* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
	#define TAG_USER_CLASS ((u_int8_t) 77)
	#define TAG_SLP_NAMING_AUTH ((u_int8_t) 80)
	#define TAG_CLIENT_FQDN ((u_int8_t) 81)
	#define TAG_AGENT_CIRCUIT ((u_int8_t) 82)
	#define TAG_AGENT_REMOTE ((u_int8_t) 83)
	#define TAG_AGENT_MASK ((u_int8_t) 84)
	#define TAG_TZ_STRING ((u_int8_t) 88)
	#define TAG_FQDN_OPTION ((u_int8_t) 89)
	#define TAG_AUTH ((u_int8_t) 90)
	#define TAG_VINES_SERVERS ((u_int8_t) 91)
	#define TAG_SERVER_RANK ((u_int8_t) 92)
	#define TAG_CLIENT_ARCH ((u_int8_t) 93)
	#define TAG_CLIENT_NDI ((u_int8_t) 94)
	#define TAG_CLIENT_GUID ((u_int8_t) 97)
	#define TAG_LDAP_URL ((u_int8_t) 95)
	#define TAG_6OVER4 ((u_int8_t) 96)
	#define TAG_PRINTER_NAME ((u_int8_t) 100)
	#define TAG_MDHCP_SERVER ((u_int8_t) 101)
	#define TAG_IPX_COMPAT ((u_int8_t) 110)
	#define TAG_NETINFO_PARENT ((u_int8_t) 112)
	#define TAG_NETINFO_PARENT_TAG ((u_int8_t) 113)
	#define TAG_URL ((u_int8_t) 114)
	#define TAG_FAILOVER ((u_int8_t) 115)
	#define TAG_EXTENDED_REQUEST ((u_int8_t) 126)
	#define TAG_EXTENDED_OPTION ((u_int8_t) 127)


	/* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
	#define DHCPDISCOVER 1
	#define DHCPOFFER 2
	#define DHCPREQUEST 3
	#define DHCPDECLINE 4
	#define DHCPACK 5
	#define DHCPNAK 6
	#define DHCPRELEASE 7
	#define DHCPINFORM 8


	/*
	* "vendor" data permitted for CMU bootp clients.
	*/

	struct cmu_vend {
	u_int8_t v_magic[4]; /* magic number */
	u_int32_t v_flags; /* flags/opcodes, etc. */
	struct in_addr v_smask; /* Subnet mask */
	struct in_addr v_dgate; /* Default gateway */
	struct in_addr v_dns1, v_dns2; /* Domain name servers */
	struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */
	struct in_addr v_ts1, v_ts2; /* Time servers */
	u_int8_t v_unused[24]; /* currently unused */
	} UNALIGNED;


	/* v_flags values */
	#define VF_SMASK 1 /* Subnet mask field contains valid data */

	/* RFC 4702 DHCP Client FQDN Option */

	#define CLIENT_FQDN_FLAGS_S 0x01
	#define CLIENT_FQDN_FLAGS_O 0x02
	#define CLIENT_FQDN_FLAGS_E 0x04
	#define CLIENT_FQDN_FLAGS_N 0x08