Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1074 insertions, 0 deletions

diff --git a/print-bootp.c b/print-bootp.c
new file mode 100644
index 0000000..d230a24
--- /dev/null
+++ b/print-bootp.c
@@ -0,0 +1,1074 @@
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: BOOTP and IPv4 DHCP printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <string.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+
+/*
+ * 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 {
+	nd_uint8_t	bp_op;		/* packet opcode type */
+	nd_uint8_t	bp_htype;	/* hardware addr type */
+	nd_uint8_t	bp_hlen;	/* hardware addr length */
+	nd_uint8_t	bp_hops;	/* gateway hops */
+	nd_uint32_t	bp_xid;		/* transaction ID */
+	nd_uint16_t	bp_secs;	/* seconds since boot began */
+	nd_uint16_t	bp_flags;	/* flags - see bootp_flag_values[]
+					   in print-bootp.c */
+	nd_ipv4		bp_ciaddr;	/* client IP address */
+	nd_ipv4		bp_yiaddr;	/* 'your' IP address */
+	nd_ipv4		bp_siaddr;	/* server IP address */
+	nd_ipv4		bp_giaddr;	/* gateway IP address */
+	nd_byte		bp_chaddr[16];	/* client hardware address */
+	nd_byte		bp_sname[64];	/* server host name */
+	nd_byte		bp_file[128];	/* boot file name */
+	nd_byte		bp_vend[64];	/* vendor-specific area */
+};
+
+#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			((uint8_t)   0)
+#define TAG_SUBNET_MASK		((uint8_t)   1)
+#define TAG_TIME_OFFSET		((uint8_t)   2)
+#define TAG_GATEWAY		((uint8_t)   3)
+#define TAG_TIME_SERVER		((uint8_t)   4)
+#define TAG_NAME_SERVER		((uint8_t)   5)
+#define TAG_DOMAIN_SERVER	((uint8_t)   6)
+#define TAG_LOG_SERVER		((uint8_t)   7)
+#define TAG_COOKIE_SERVER	((uint8_t)   8)
+#define TAG_LPR_SERVER		((uint8_t)   9)
+#define TAG_IMPRESS_SERVER	((uint8_t)  10)
+#define TAG_RLP_SERVER		((uint8_t)  11)
+#define TAG_HOSTNAME		((uint8_t)  12)
+#define TAG_BOOTSIZE		((uint8_t)  13)
+#define TAG_END			((uint8_t) 255)
+/* RFC1497 tags */
+#define	TAG_DUMPPATH		((uint8_t)  14)
+#define	TAG_DOMAINNAME		((uint8_t)  15)
+#define	TAG_SWAP_SERVER		((uint8_t)  16)
+#define	TAG_ROOTPATH		((uint8_t)  17)
+#define	TAG_EXTPATH		((uint8_t)  18)
+/* RFC2132 */
+#define	TAG_IP_FORWARD		((uint8_t)  19)
+#define	TAG_NL_SRCRT		((uint8_t)  20)
+#define	TAG_PFILTERS		((uint8_t)  21)
+#define	TAG_REASS_SIZE		((uint8_t)  22)
+#define	TAG_DEF_TTL		((uint8_t)  23)
+#define	TAG_MTU_TIMEOUT		((uint8_t)  24)
+#define	TAG_MTU_TABLE		((uint8_t)  25)
+#define	TAG_INT_MTU		((uint8_t)  26)
+#define	TAG_LOCAL_SUBNETS	((uint8_t)  27)
+#define	TAG_BROAD_ADDR		((uint8_t)  28)
+#define	TAG_DO_MASK_DISC	((uint8_t)  29)
+#define	TAG_SUPPLY_MASK		((uint8_t)  30)
+#define	TAG_DO_RDISC		((uint8_t)  31)
+#define	TAG_RTR_SOL_ADDR	((uint8_t)  32)
+#define	TAG_STATIC_ROUTE	((uint8_t)  33)
+#define	TAG_USE_TRAILERS	((uint8_t)  34)
+#define	TAG_ARP_TIMEOUT		((uint8_t)  35)
+#define	TAG_ETH_ENCAP		((uint8_t)  36)
+#define	TAG_TCP_TTL		((uint8_t)  37)
+#define	TAG_TCP_KEEPALIVE	((uint8_t)  38)
+#define	TAG_KEEPALIVE_GO	((uint8_t)  39)
+#define	TAG_NIS_DOMAIN		((uint8_t)  40)
+#define	TAG_NIS_SERVERS		((uint8_t)  41)
+#define	TAG_NTP_SERVERS		((uint8_t)  42)
+#define	TAG_VENDOR_OPTS		((uint8_t)  43)
+#define	TAG_NETBIOS_NS		((uint8_t)  44)
+#define	TAG_NETBIOS_DDS		((uint8_t)  45)
+#define	TAG_NETBIOS_NODE	((uint8_t)  46)
+#define	TAG_NETBIOS_SCOPE	((uint8_t)  47)
+#define	TAG_XWIN_FS		((uint8_t)  48)
+#define	TAG_XWIN_DM		((uint8_t)  49)
+#define	TAG_NIS_P_DOMAIN	((uint8_t)  64)
+#define	TAG_NIS_P_SERVERS	((uint8_t)  65)
+#define	TAG_MOBILE_HOME		((uint8_t)  68)
+#define	TAG_SMPT_SERVER		((uint8_t)  69)
+#define	TAG_POP3_SERVER		((uint8_t)  70)
+#define	TAG_NNTP_SERVER		((uint8_t)  71)
+#define	TAG_WWW_SERVER		((uint8_t)  72)
+#define	TAG_FINGER_SERVER	((uint8_t)  73)
+#define	TAG_IRC_SERVER		((uint8_t)  74)
+#define	TAG_STREETTALK_SRVR	((uint8_t)  75)
+#define	TAG_STREETTALK_STDA	((uint8_t)  76)
+/* DHCP options */
+#define	TAG_REQUESTED_IP	((uint8_t)  50)
+#define	TAG_IP_LEASE		((uint8_t)  51)
+#define	TAG_OPT_OVERLOAD	((uint8_t)  52)
+#define	TAG_TFTP_SERVER		((uint8_t)  66)
+#define	TAG_BOOTFILENAME	((uint8_t)  67)
+#define	TAG_DHCP_MESSAGE	((uint8_t)  53)
+#define	TAG_SERVER_ID		((uint8_t)  54)
+#define	TAG_PARM_REQUEST	((uint8_t)  55)
+#define	TAG_MESSAGE		((uint8_t)  56)
+#define	TAG_MAX_MSG_SIZE	((uint8_t)  57)
+#define	TAG_RENEWAL_TIME	((uint8_t)  58)
+#define	TAG_REBIND_TIME		((uint8_t)  59)
+#define	TAG_VENDOR_CLASS	((uint8_t)  60)
+#define	TAG_CLIENT_ID		((uint8_t)  61)
+/* RFC 2241 */
+#define	TAG_NDS_SERVERS		((uint8_t)  85)
+#define	TAG_NDS_TREE_NAME	((uint8_t)  86)
+#define	TAG_NDS_CONTEXT		((uint8_t)  87)
+/* RFC 2242 */
+#define	TAG_NDS_IPDOMAIN	((uint8_t)  62)
+#define	TAG_NDS_IPINFO		((uint8_t)  63)
+/* RFC 2485 */
+#define	TAG_OPEN_GROUP_UAP	((uint8_t)  98)
+/* RFC 2563 */
+#define	TAG_DISABLE_AUTOCONF	((uint8_t) 116)
+/* RFC 2610 */
+#define	TAG_SLP_DA		((uint8_t)  78)
+#define	TAG_SLP_SCOPE		((uint8_t)  79)
+/* RFC 2937 */
+#define	TAG_NS_SEARCH		((uint8_t) 117)
+/* RFC 3004 - The User Class Option for DHCP */
+#define	TAG_USER_CLASS		((uint8_t)  77)
+/* RFC 3011 */
+#define	TAG_IP4_SUBNET_SELECT	((uint8_t) 118)
+/* RFC 3442 */
+#define TAG_CLASSLESS_STATIC_RT	((uint8_t) 121)
+#define TAG_CLASSLESS_STA_RT_MS	((uint8_t) 249)
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+#define	TAG_TFTP_SERVER_ADDRESS	((uint8_t) 150)
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml */
+#define	TAG_SLP_NAMING_AUTH	((uint8_t)  80)
+#define	TAG_CLIENT_FQDN		((uint8_t)  81)
+#define	TAG_AGENT_CIRCUIT	((uint8_t)  82)
+#define	TAG_AGENT_REMOTE	((uint8_t)  83)
+#define	TAG_TZ_STRING		((uint8_t)  88)
+#define	TAG_FQDN_OPTION		((uint8_t)  89)
+#define	TAG_AUTH		((uint8_t)  90)
+#define	TAG_CLIENT_LAST_TRANSACTION_TIME	((uint8_t)  91)
+#define	TAG_ASSOCIATED_IP			((uint8_t)  92)
+#define	TAG_CLIENT_ARCH		((uint8_t)  93)
+#define	TAG_CLIENT_NDI		((uint8_t)  94)
+#define	TAG_CLIENT_GUID		((uint8_t)  97)
+#define	TAG_LDAP_URL		((uint8_t)  95)
+/* RFC 4833, TZ codes */
+#define	TAG_TZ_PCODE		((uint8_t) 100)
+#define	TAG_TZ_TCODE		((uint8_t) 101)
+#define	TAG_NETINFO_PARENT	((uint8_t) 112)
+#define	TAG_NETINFO_PARENT_TAG	((uint8_t) 113)
+#define	TAG_URL			((uint8_t) 114)
+#define TAG_MUDURL              ((uint8_t) 161)
+
+/* 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
+/* Defined in RFC4388 */
+#define DHCPLEASEQUERY       10
+#define DHCPLEASEUNASSIGNED  11
+#define DHCPLEASEUNKNOWN     12
+#define DHCPLEASEACTIVE      13
+
+
+/*
+ * "vendor" data permitted for CMU bootp clients.
+ */
+
+struct cmu_vend {
+	nd_byte		v_magic[4];	/* magic number */
+	nd_uint32_t	v_flags;	/* flags/opcodes, etc. */
+	nd_ipv4		v_smask;	/* Subnet mask */
+	nd_ipv4		v_dgate;	/* Default gateway */
+	nd_ipv4		v_dns1, v_dns2; /* Domain name servers */
+	nd_ipv4		v_ins1, v_ins2; /* IEN-116 name servers */
+	nd_ipv4		v_ts1, v_ts2;	/* Time servers */
+	nd_byte		v_unused[24];	/* currently unused */
+};
+
+
+/* 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
+/* end of original bootp.h */
+
+static void rfc1048_print(netdissect_options *, const u_char *);
+static void cmu_print(netdissect_options *, const u_char *);
+static char *client_fqdn_flags(u_int flags);
+
+static const struct tok bootp_flag_values[] = {
+	{ 0x8000,	"Broadcast" },
+	{ 0, NULL}
+};
+
+static const struct tok bootp_op_values[] = {
+	{ BOOTPREQUEST,	"Request" },
+	{ BOOTPREPLY,	"Reply" },
+	{ 0, NULL}
+};
+
+/*
+ * Print bootp requests
+ */
+void
+bootp_print(netdissect_options *ndo,
+	    const u_char *cp, u_int length)
+{
+	const struct bootp *bp;
+	static const u_char vm_cmu[4] = VM_CMU;
+	static const u_char vm_rfc1048[4] = VM_RFC1048;
+	uint8_t bp_op, bp_htype, bp_hlen;
+
+	ndo->ndo_protocol = "bootp";
+	bp = (const struct bootp *)cp;
+	bp_op = GET_U_1(bp->bp_op);
+	ND_PRINT("BOOTP/DHCP, %s",
+		  tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
+
+	bp_htype = GET_U_1(bp->bp_htype);
+	bp_hlen = GET_U_1(bp->bp_hlen);
+	if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN && bp_op == BOOTPREQUEST) {
+		ND_PRINT(" from %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
+	}
+
+	ND_PRINT(", length %u", length);
+
+	if (!ndo->ndo_vflag)
+		return;
+
+	ND_TCHECK_2(bp->bp_secs);
+
+	/* The usual hardware address type is 1 (10Mb Ethernet) */
+	if (bp_htype != 1)
+		ND_PRINT(", htype %u", bp_htype);
+
+	/* The usual length for 10Mb Ethernet address is 6 bytes */
+	if (bp_htype != 1 || bp_hlen != MAC_ADDR_LEN)
+		ND_PRINT(", hlen %u", bp_hlen);
+
+	/* Only print interesting fields */
+	if (GET_U_1(bp->bp_hops))
+		ND_PRINT(", hops %u", GET_U_1(bp->bp_hops));
+	if (GET_BE_U_4(bp->bp_xid))
+		ND_PRINT(", xid 0x%x", GET_BE_U_4(bp->bp_xid));
+	if (GET_BE_U_2(bp->bp_secs))
+		ND_PRINT(", secs %u", GET_BE_U_2(bp->bp_secs));
+
+	ND_PRINT(", Flags [%s]",
+		  bittok2str(bootp_flag_values, "none", GET_BE_U_2(bp->bp_flags)));
+	if (ndo->ndo_vflag > 1)
+		ND_PRINT(" (0x%04x)", GET_BE_U_2(bp->bp_flags));
+
+	/* Client's ip address */
+	if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_ciaddr))
+		ND_PRINT("\n\t  Client-IP %s", GET_IPADDR_STRING(bp->bp_ciaddr));
+
+	/* 'your' ip address (bootp client) */
+	if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_yiaddr))
+		ND_PRINT("\n\t  Your-IP %s", GET_IPADDR_STRING(bp->bp_yiaddr));
+
+	/* Server's ip address */
+	if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_siaddr))
+		ND_PRINT("\n\t  Server-IP %s", GET_IPADDR_STRING(bp->bp_siaddr));
+
+	/* Gateway's ip address */
+	if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_giaddr))
+		ND_PRINT("\n\t  Gateway-IP %s", GET_IPADDR_STRING(bp->bp_giaddr));
+
+	/* Client's Ethernet address */
+	if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN) {
+		ND_PRINT("\n\t  Client-Ethernet-Address %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
+	}
+
+	if (GET_U_1(bp->bp_sname)) {	/* get first char only */
+		ND_PRINT("\n\t  sname \"");
+		if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
+				ndo->ndo_snapend) == 0) {
+			ND_PRINT("\"");
+			nd_print_trunc(ndo);
+			return;
+		}
+		ND_PRINT("\"");
+	}
+	if (GET_U_1(bp->bp_file)) {	/* get first char only */
+		ND_PRINT("\n\t  file \"");
+		if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
+				ndo->ndo_snapend) == 0) {
+			ND_PRINT("\"");
+			nd_print_trunc(ndo);
+			return;
+		}
+		ND_PRINT("\"");
+	}
+
+	/* Decode the vendor buffer */
+	ND_TCHECK_4(bp->bp_vend);
+	if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
+		    sizeof(uint32_t)) == 0)
+		rfc1048_print(ndo, bp->bp_vend);
+	else if (memcmp((const char *)bp->bp_vend, vm_cmu,
+			sizeof(uint32_t)) == 0)
+		cmu_print(ndo, bp->bp_vend);
+	else {
+		uint32_t ul;
+
+		ul = GET_BE_U_4(bp->bp_vend);
+		if (ul != 0)
+			ND_PRINT("\n\t  Vendor-#0x%x", ul);
+	}
+
+	return;
+trunc:
+	nd_print_trunc(ndo);
+}
+
+/*
+ * The first character specifies the format to print:
+ *     i - ip address (32 bits)
+ *     p - ip address pairs (32 bits + 32 bits)
+ *     l - long (32 bits)
+ *     L - unsigned long (32 bits)
+ *     s - short (16 bits)
+ *     b - period-separated decimal bytes (variable length)
+ *     x - colon-separated hex bytes (variable length)
+ *     a - ASCII string (variable length)
+ *     B - on/off (8 bits)
+ *     $ - special (explicit code to handle)
+ */
+static const struct tok tag2str[] = {
+/* RFC1048 tags */
+	{ TAG_PAD,		" PAD" },
+	{ TAG_SUBNET_MASK,	"iSubnet-Mask" },	/* subnet mask (RFC950) */
+	{ TAG_TIME_OFFSET,	"LTime-Zone" },	/* seconds from UTC */
+	{ TAG_GATEWAY,		"iDefault-Gateway" },	/* default gateway */
+	{ TAG_TIME_SERVER,	"iTime-Server" },	/* time servers (RFC868) */
+	{ TAG_NAME_SERVER,	"iIEN-Name-Server" },	/* IEN name servers (IEN116) */
+	{ TAG_DOMAIN_SERVER,	"iDomain-Name-Server" },	/* domain name (RFC1035) */
+	{ TAG_LOG_SERVER,	"iLOG" },	/* MIT log servers */
+	{ TAG_COOKIE_SERVER,	"iCS" },	/* cookie servers (RFC865) */
+	{ TAG_LPR_SERVER,	"iLPR-Server" },	/* lpr server (RFC1179) */
+	{ TAG_IMPRESS_SERVER,	"iIM" },	/* impress servers (Imagen) */
+	{ TAG_RLP_SERVER,	"iRL" },	/* resource location (RFC887) */
+	{ TAG_HOSTNAME,		"aHostname" },	/* ASCII hostname */
+	{ TAG_BOOTSIZE,		"sBS" },	/* 512 byte blocks */
+	{ TAG_END,		" END" },
+/* RFC1497 tags */
+	{ TAG_DUMPPATH,		"aDP" },
+	{ TAG_DOMAINNAME,	"aDomain-Name" },
+	{ TAG_SWAP_SERVER,	"iSS" },
+	{ TAG_ROOTPATH,		"aRP" },
+	{ TAG_EXTPATH,		"aEP" },
+/* RFC2132 tags */
+	{ TAG_IP_FORWARD,	"BIPF" },
+	{ TAG_NL_SRCRT,		"BSRT" },
+	{ TAG_PFILTERS,		"pPF" },
+	{ TAG_REASS_SIZE,	"sRSZ" },
+	{ TAG_DEF_TTL,		"bTTL" },
+	{ TAG_MTU_TIMEOUT,	"lMTU-Timeout" },
+	{ TAG_MTU_TABLE,	"sMTU-Table" },
+	{ TAG_INT_MTU,		"sMTU" },
+	{ TAG_LOCAL_SUBNETS,	"BLSN" },
+	{ TAG_BROAD_ADDR,	"iBR" },
+	{ TAG_DO_MASK_DISC,	"BMD" },
+	{ TAG_SUPPLY_MASK,	"BMS" },
+	{ TAG_DO_RDISC,		"BRouter-Discovery" },
+	{ TAG_RTR_SOL_ADDR,	"iRSA" },
+	{ TAG_STATIC_ROUTE,	"pStatic-Route" },
+	{ TAG_USE_TRAILERS,	"BUT" },
+	{ TAG_ARP_TIMEOUT,	"lAT" },
+	{ TAG_ETH_ENCAP,	"BIE" },
+	{ TAG_TCP_TTL,		"bTT" },
+	{ TAG_TCP_KEEPALIVE,	"lKI" },
+	{ TAG_KEEPALIVE_GO,	"BKG" },
+	{ TAG_NIS_DOMAIN,	"aYD" },
+	{ TAG_NIS_SERVERS,	"iYS" },
+	{ TAG_NTP_SERVERS,	"iNTP" },
+	{ TAG_VENDOR_OPTS,	"bVendor-Option" },
+	{ TAG_NETBIOS_NS,	"iNetbios-Name-Server" },
+	{ TAG_NETBIOS_DDS,	"iWDD" },
+	{ TAG_NETBIOS_NODE,	"$Netbios-Node" },
+	{ TAG_NETBIOS_SCOPE,	"aNetbios-Scope" },
+	{ TAG_XWIN_FS,		"iXFS" },
+	{ TAG_XWIN_DM,		"iXDM" },
+	{ TAG_NIS_P_DOMAIN,	"sN+D" },
+	{ TAG_NIS_P_SERVERS,	"iN+S" },
+	{ TAG_MOBILE_HOME,	"iMH" },
+	{ TAG_SMPT_SERVER,	"iSMTP" },
+	{ TAG_POP3_SERVER,	"iPOP3" },
+	{ TAG_NNTP_SERVER,	"iNNTP" },
+	{ TAG_WWW_SERVER,	"iWWW" },
+	{ TAG_FINGER_SERVER,	"iFG" },
+	{ TAG_IRC_SERVER,	"iIRC" },
+	{ TAG_STREETTALK_SRVR,	"iSTS" },
+	{ TAG_STREETTALK_STDA,	"iSTDA" },
+	{ TAG_REQUESTED_IP,	"iRequested-IP" },
+	{ TAG_IP_LEASE,		"lLease-Time" },
+	{ TAG_OPT_OVERLOAD,	"$OO" },
+	{ TAG_TFTP_SERVER,	"aTFTP" },
+	{ TAG_BOOTFILENAME,	"aBF" },
+	{ TAG_DHCP_MESSAGE,	" DHCP-Message" },
+	{ TAG_SERVER_ID,	"iServer-ID" },
+	{ TAG_PARM_REQUEST,	"bParameter-Request" },
+	{ TAG_MESSAGE,		"aMSG" },
+	{ TAG_MAX_MSG_SIZE,	"sMSZ" },
+	{ TAG_RENEWAL_TIME,	"lRN" },
+	{ TAG_REBIND_TIME,	"lRB" },
+	{ TAG_VENDOR_CLASS,	"aVendor-Class" },
+	{ TAG_CLIENT_ID,	"$Client-ID" },
+/* RFC 2485 */
+	{ TAG_OPEN_GROUP_UAP,	"aUAP" },
+/* RFC 2563 */
+	{ TAG_DISABLE_AUTOCONF,	"BNOAUTO" },
+/* RFC 2610 */
+	{ TAG_SLP_DA,		"bSLP-DA" },	/*"b" is a little wrong */
+	{ TAG_SLP_SCOPE,	"bSLP-SCOPE" },	/*"b" is a little wrong */
+/* RFC 2937 */
+	{ TAG_NS_SEARCH,	"sNSSEARCH" },	/* XXX 's' */
+/* RFC 3004 - The User Class Option for DHCP */
+	{ TAG_USER_CLASS,	"$User-Class" },
+/* RFC 3011 */
+	{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
+/* RFC 3442 */
+	{ TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
+	{ TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+	{ TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml#options */
+	{ TAG_SLP_NAMING_AUTH,	"aSLP-NA" },
+	{ TAG_CLIENT_FQDN,	"$FQDN" },
+	{ TAG_AGENT_CIRCUIT,	"$Agent-Information" },
+	{ TAG_AGENT_REMOTE,	"bARMT" },
+	{ TAG_TZ_STRING,	"aTZSTR" },
+	{ TAG_FQDN_OPTION,	"bFQDNS" },	/* XXX 'b' */
+	{ TAG_AUTH,		"bAUTH" },	/* XXX 'b' */
+	{ TAG_CLIENT_LAST_TRANSACTION_TIME, "LLast-Transaction-Time" },
+	{ TAG_ASSOCIATED_IP,	"iAssociated-IP" },
+	{ TAG_CLIENT_ARCH,	"sARCH" },
+	{ TAG_CLIENT_NDI,	"bNDI" },	/* XXX 'b' */
+	{ TAG_CLIENT_GUID,	"bGUID" },	/* XXX 'b' */
+	{ TAG_LDAP_URL,		"aLDAP" },
+	{ TAG_TZ_PCODE,		"aPOSIX-TZ" },
+	{ TAG_TZ_TCODE,		"aTZ-Name" },
+	{ TAG_NETINFO_PARENT,	"iNI" },
+	{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
+	{ TAG_URL,		"aURL" },
+	{ TAG_MUDURL,           "aMUD-URL" },
+	{ 0, NULL }
+};
+
+/* DHCP "options overload" types */
+static const struct tok oo2str[] = {
+	{ 1,	"file" },
+	{ 2,	"sname" },
+	{ 3,	"file+sname" },
+	{ 0, NULL }
+};
+
+/* NETBIOS over TCP/IP node type options */
+static const struct tok nbo2str[] = {
+	{ 0x1,	"b-node" },
+	{ 0x2,	"p-node" },
+	{ 0x4,	"m-node" },
+	{ 0x8,	"h-node" },
+	{ 0, NULL }
+};
+
+/* ARP Hardware types, for Client-ID option */
+static const struct tok arp2str[] = {
+	{ 0x1,	"ether" },
+	{ 0x6,	"ieee802" },
+	{ 0x7,	"arcnet" },
+	{ 0xf,	"frelay" },
+	{ 0x17,	"strip" },
+	{ 0x18,	"ieee1394" },
+	{ 0, NULL }
+};
+
+static const struct tok dhcp_msg_values[] = {
+	{ DHCPDISCOVER,	       "Discover" },
+	{ DHCPOFFER,	       "Offer" },
+	{ DHCPREQUEST,	       "Request" },
+	{ DHCPDECLINE,	       "Decline" },
+	{ DHCPACK,	       "ACK" },
+	{ DHCPNAK,	       "NACK" },
+	{ DHCPRELEASE,	       "Release" },
+	{ DHCPINFORM,	       "Inform" },
+	{ DHCPLEASEQUERY,      "LeaseQuery" },
+	{ DHCPLEASEUNASSIGNED, "LeaseUnassigned" },
+	{ DHCPLEASEUNKNOWN,    "LeaseUnknown" },
+	{ DHCPLEASEACTIVE,     "LeaseActive" },
+	{ 0, NULL }
+};
+
+#define AGENT_SUBOPTION_CIRCUIT_ID	1	/* RFC 3046 */
+#define AGENT_SUBOPTION_REMOTE_ID	2	/* RFC 3046 */
+#define AGENT_SUBOPTION_SUBSCRIBER_ID	6	/* RFC 3993 */
+static const struct tok agent_suboption_values[] = {
+	{ AGENT_SUBOPTION_CIRCUIT_ID,    "Circuit-ID" },
+	{ AGENT_SUBOPTION_REMOTE_ID,     "Remote-ID" },
+	{ AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
+	{ 0, NULL }
+};
+
+
+static void
+rfc1048_print(netdissect_options *ndo,
+	      const u_char *bp)
+{
+	uint16_t tag;
+	u_int len;
+	const char *cp;
+	char c;
+	int first, idx;
+	uint8_t subopt, suboptlen;
+
+	ND_PRINT("\n\t  Vendor-rfc1048 Extensions");
+
+	/* Step over magic cookie */
+	ND_PRINT("\n\t    Magic Cookie 0x%08x", GET_BE_U_4(bp));
+	bp += sizeof(int32_t);
+
+	/* Loop while we there is a tag left in the buffer */
+	while (ND_TTEST_1(bp)) {
+		tag = GET_U_1(bp);
+		bp++;
+		if (tag == TAG_PAD && ndo->ndo_vflag < 3)
+			continue;
+		if (tag == TAG_END && ndo->ndo_vflag < 3)
+			return;
+		cp = tok2str(tag2str, "?Unknown", tag);
+		c = *cp++;
+
+		if (tag == TAG_PAD || tag == TAG_END)
+			len = 0;
+		else {
+			/* Get the length; check for truncation */
+			len = GET_U_1(bp);
+			bp++;
+		}
+
+		ND_PRINT("\n\t    %s (%u), length %u%s", cp, tag, len,
+			  len > 0 ? ": " : "");
+
+		if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
+			u_int ntag = 1;
+			while (ND_TTEST_1(bp) &&
+			       GET_U_1(bp) == TAG_PAD) {
+				bp++;
+				ntag++;
+			}
+			if (ntag > 1)
+				ND_PRINT(", occurs %u", ntag);
+		}
+
+		ND_TCHECK_LEN(bp, len);
+
+		if (tag == TAG_DHCP_MESSAGE && len == 1) {
+			ND_PRINT("%s",
+				 tok2str(dhcp_msg_values, "Unknown (%u)", GET_U_1(bp)));
+			bp++;
+			continue;
+		}
+
+		if (tag == TAG_PARM_REQUEST) {
+			idx = 0;
+			while (len > 0) {
+				uint8_t innertag = GET_U_1(bp);
+				bp++;
+				len--;
+				cp = tok2str(tag2str, "?Unknown", innertag);
+				if (idx % 4 == 0)
+					ND_PRINT("\n\t      ");
+				else
+					ND_PRINT(", ");
+				ND_PRINT("%s (%u)", cp + 1, innertag);
+				idx++;
+			}
+			continue;
+		}
+
+		/* Print data */
+		if (c == '?') {
+			/* Base default formats for unknown tags on data size */
+			if (len & 1)
+				c = 'b';
+			else if (len & 2)
+				c = 's';
+			else
+				c = 'l';
+		}
+		first = 1;
+		switch (c) {
+
+		case 'a':
+			/* ASCII strings */
+			ND_PRINT("\"");
+			if (nd_printn(ndo, bp, len, ndo->ndo_snapend)) {
+				ND_PRINT("\"");
+				goto trunc;
+			}
+			ND_PRINT("\"");
+			bp += len;
+			len = 0;
+			break;
+
+		case 'i':
+		case 'l':
+		case 'L':
+			/* ip addresses/32-bit words */
+			while (len >= 4) {
+				if (!first)
+					ND_PRINT(",");
+				if (c == 'i')
+					ND_PRINT("%s", GET_IPADDR_STRING(bp));
+				else if (c == 'L')
+					ND_PRINT("%d", GET_BE_S_4(bp));
+				else
+					ND_PRINT("%u", GET_BE_U_4(bp));
+				bp += 4;
+				len -= 4;
+				first = 0;
+			}
+			break;
+
+		case 'p':
+			/* IP address pairs */
+			while (len >= 2*4) {
+				if (!first)
+					ND_PRINT(",");
+				ND_PRINT("(%s:", GET_IPADDR_STRING(bp));
+				bp += 4;
+				len -= 4;
+				ND_PRINT("%s)", GET_IPADDR_STRING(bp));
+				bp += 4;
+				len -= 4;
+				first = 0;
+			}
+			break;
+
+		case 's':
+			/* shorts */
+			while (len >= 2) {
+				if (!first)
+					ND_PRINT(",");
+				ND_PRINT("%u", GET_BE_U_2(bp));
+				bp += 2;
+				len -= 2;
+				first = 0;
+			}
+			break;
+
+		case 'B':
+			/* boolean */
+			while (len > 0) {
+				uint8_t bool_value;
+				if (!first)
+					ND_PRINT(",");
+				bool_value = GET_U_1(bp);
+				switch (bool_value) {
+				case 0:
+					ND_PRINT("N");
+					break;
+				case 1:
+					ND_PRINT("Y");
+					break;
+				default:
+					ND_PRINT("%u?", bool_value);
+					break;
+				}
+				++bp;
+				--len;
+				first = 0;
+			}
+			break;
+
+		case 'b':
+		case 'x':
+		default:
+			/* Bytes */
+			while (len > 0) {
+				uint8_t byte_value;
+				if (!first)
+					ND_PRINT(c == 'x' ? ":" : ".");
+				byte_value = GET_U_1(bp);
+				if (c == 'x')
+					ND_PRINT("%02x", byte_value);
+				else
+					ND_PRINT("%u", byte_value);
+				++bp;
+				--len;
+				first = 0;
+			}
+			break;
+
+		case '$':
+			/* Guys we can't handle with one of the usual cases */
+			switch (tag) {
+
+			case TAG_NETBIOS_NODE:
+				/* this option should be at least 1 byte long */
+				if (len < 1) {
+					ND_PRINT("[ERROR: length < 1 bytes]");
+					break;
+				}
+				tag = GET_U_1(bp);
+				++bp;
+				--len;
+				ND_PRINT("%s", tok2str(nbo2str, NULL, tag));
+				break;
+
+			case TAG_OPT_OVERLOAD:
+				/* this option should be at least 1 byte long */
+				if (len < 1) {
+					ND_PRINT("[ERROR: length < 1 bytes]");
+					break;
+				}
+				tag = GET_U_1(bp);
+				++bp;
+				--len;
+				ND_PRINT("%s", tok2str(oo2str, NULL, tag));
+				break;
+
+			case TAG_CLIENT_FQDN:
+				/* this option should be at least 3 bytes long */
+				if (len < 3) {
+					ND_PRINT("[ERROR: length < 3 bytes]");
+					bp += len;
+					len = 0;
+					break;
+				}
+				if (GET_U_1(bp) & 0xf0) {
+					ND_PRINT("[ERROR: MBZ nibble 0x%x != 0] ",
+						 (GET_U_1(bp) & 0xf0) >> 4);
+				}
+				if (GET_U_1(bp) & 0x0f)
+					ND_PRINT("[%s] ",
+						 client_fqdn_flags(GET_U_1(bp)));
+				bp++;
+				if (GET_U_1(bp) || GET_U_1(bp + 1))
+					ND_PRINT("%u/%u ", GET_U_1(bp),
+						 GET_U_1(bp + 1));
+				bp += 2;
+				ND_PRINT("\"");
+				if (nd_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
+					ND_PRINT("\"");
+					goto trunc;
+				}
+				ND_PRINT("\"");
+				bp += len - 3;
+				len = 0;
+				break;
+
+			case TAG_CLIENT_ID:
+			    {
+				int type;
+
+				/* this option should be at least 1 byte long */
+				if (len < 1) {
+					ND_PRINT("[ERROR: length < 1 bytes]");
+					break;
+				}
+				type = GET_U_1(bp);
+				bp++;
+				len--;
+				if (type == 0) {
+					ND_PRINT("\"");
+					if (nd_printn(ndo, bp, len, ndo->ndo_snapend)) {
+						ND_PRINT("\"");
+						goto trunc;
+					}
+					ND_PRINT("\"");
+					bp += len;
+					len = 0;
+					break;
+				} else {
+					ND_PRINT("%s ", tok2str(arp2str, "hardware-type %u,", type));
+					while (len > 0) {
+						if (!first)
+							ND_PRINT(":");
+						ND_PRINT("%02x", GET_U_1(bp));
+						++bp;
+						--len;
+						first = 0;
+					}
+				}
+				break;
+			    }
+
+			case TAG_AGENT_CIRCUIT:
+				while (len >= 2) {
+					subopt = GET_U_1(bp);
+					suboptlen = GET_U_1(bp + 1);
+					bp += 2;
+					len -= 2;
+					if (suboptlen > len) {
+						ND_PRINT("\n\t      %s SubOption %u, length %u: length goes past end of option",
+							  tok2str(agent_suboption_values, "Unknown", subopt),
+							  subopt,
+							  suboptlen);
+						bp += len;
+						len = 0;
+						break;
+					}
+					ND_PRINT("\n\t      %s SubOption %u, length %u: ",
+						  tok2str(agent_suboption_values, "Unknown", subopt),
+						  subopt,
+						  suboptlen);
+					switch (subopt) {
+
+					case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
+					case AGENT_SUBOPTION_REMOTE_ID:
+					case AGENT_SUBOPTION_SUBSCRIBER_ID:
+						if (nd_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
+							goto trunc;
+						break;
+
+					default:
+						print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
+					}
+
+					len -= suboptlen;
+					bp += suboptlen;
+				}
+				break;
+
+			case TAG_CLASSLESS_STATIC_RT:
+			case TAG_CLASSLESS_STA_RT_MS:
+			    {
+				u_int mask_width, significant_octets, i;
+
+				/* this option should be at least 5 bytes long */
+				if (len < 5) {
+					ND_PRINT("[ERROR: length < 5 bytes]");
+					bp += len;
+					len = 0;
+					break;
+				}
+				while (len > 0) {
+					if (!first)
+						ND_PRINT(",");
+					mask_width = GET_U_1(bp);
+					bp++;
+					len--;
+					/* mask_width <= 32 */
+					if (mask_width > 32) {
+						ND_PRINT("[ERROR: Mask width (%u) > 32]", mask_width);
+						bp += len;
+						len = 0;
+						break;
+					}
+					significant_octets = (mask_width + 7) / 8;
+					/* significant octets + router(4) */
+					if (len < significant_octets + 4) {
+						ND_PRINT("[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4);
+						bp += len;
+						len = 0;
+						break;
+					}
+					ND_PRINT("(");
+					if (mask_width == 0)
+						ND_PRINT("default");
+					else {
+						for (i = 0; i < significant_octets ; i++) {
+							if (i > 0)
+								ND_PRINT(".");
+							ND_PRINT("%u",
+								 GET_U_1(bp));
+							bp++;
+						}
+						for (i = significant_octets ; i < 4 ; i++)
+							ND_PRINT(".0");
+						ND_PRINT("/%u", mask_width);
+					}
+					ND_PRINT(":%s)", GET_IPADDR_STRING(bp));
+					bp += 4;
+					len -= (significant_octets + 4);
+					first = 0;
+				}
+				break;
+			    }
+
+			case TAG_USER_CLASS:
+			    {
+				u_int suboptnumber = 1;
+
+				first = 1;
+				if (len < 2) {
+					ND_PRINT("[ERROR: length < 2 bytes]");
+					bp += len;
+					len = 0;
+					break;
+				}
+				while (len > 0) {
+					suboptlen = GET_U_1(bp);
+					bp++;
+					len--;
+					ND_PRINT("\n\t      ");
+					ND_PRINT("instance#%u: ", suboptnumber);
+					if (suboptlen == 0) {
+						ND_PRINT("[ERROR: suboption length must be non-zero]");
+						bp += len;
+						len = 0;
+						break;
+					}
+					if (len < suboptlen) {
+						ND_PRINT("[ERROR: invalid option]");
+						bp += len;
+						len = 0;
+						break;
+					}
+					ND_PRINT("\"");
+					if (nd_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
+						ND_PRINT("\"");
+						goto trunc;
+					}
+					ND_PRINT("\"");
+					ND_PRINT(", length %u", suboptlen);
+					suboptnumber++;
+					len -= suboptlen;
+					bp += suboptlen;
+				}
+				break;
+			    }
+
+			default:
+				ND_PRINT("[unknown special tag %u, size %u]",
+					  tag, len);
+				bp += len;
+				len = 0;
+				break;
+			}
+			break;
+		}
+		/* Data left over? */
+		if (len) {
+			ND_PRINT("\n\t  trailing data length %u", len);
+			bp += len;
+		}
+	}
+	return;
+trunc:
+	nd_print_trunc(ndo);
+}
+
+#define PRINTCMUADDR(m, s) { ND_TCHECK_4(cmu->m); \
+    if (GET_IPV4_TO_NETWORK_ORDER(cmu->m) != 0) \
+	ND_PRINT(" %s:%s", s, GET_IPADDR_STRING(cmu->m)); }
+
+static void
+cmu_print(netdissect_options *ndo,
+	  const u_char *bp)
+{
+	const struct cmu_vend *cmu;
+	uint8_t v_flags;
+
+	ND_PRINT(" vend-cmu");
+	cmu = (const struct cmu_vend *)bp;
+
+	/* Only print if there are unknown bits */
+	ND_TCHECK_4(cmu->v_flags);
+	v_flags = GET_U_1(cmu->v_flags);
+	if ((v_flags & ~(VF_SMASK)) != 0)
+		ND_PRINT(" F:0x%x", v_flags);
+	PRINTCMUADDR(v_dgate, "DG");
+	PRINTCMUADDR(v_smask, v_flags & VF_SMASK ? "SM" : "SM*");
+	PRINTCMUADDR(v_dns1, "NS1");
+	PRINTCMUADDR(v_dns2, "NS2");
+	PRINTCMUADDR(v_ins1, "IEN1");
+	PRINTCMUADDR(v_ins2, "IEN2");
+	PRINTCMUADDR(v_ts1, "TS1");
+	PRINTCMUADDR(v_ts2, "TS2");
+	return;
+
+trunc:
+	nd_print_trunc(ndo);
+}
+
+#undef PRINTCMUADDR
+
+static char *
+client_fqdn_flags(u_int flags)
+{
+	static char buf[8+1];
+	int i = 0;
+
+	if (flags & CLIENT_FQDN_FLAGS_S)
+		buf[i++] = 'S';
+	if (flags & CLIENT_FQDN_FLAGS_O)
+		buf[i++] = 'O';
+	if (flags & CLIENT_FQDN_FLAGS_E)
+		buf[i++] = 'E';
+	if (flags & CLIENT_FQDN_FLAGS_N)
+		buf[i++] = 'N';
+	buf[i] = '\0';
+
+	return buf;
+}