645 lines
16 KiB
C
Executable File
645 lines
16 KiB
C
Executable File
/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print bootp packets.
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /Users/olsen/Code/cvs2svn-2010/os4-cvs-repository/contrib/roadshow/client-software/tcpdump-3.8.1/print-bootp.c,v 1.2 2004-09-22 15:40:55 olsen Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "ether.h"
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#include "bootp.h"
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static void rfc1048_print(const u_char *);
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static void cmu_print(const u_char *);
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static char tstr[] = " [|bootp]";
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static const struct tok bootp_flag_values[] = {
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{ 0x8000, "Broadcast" },
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{ 0, NULL}
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};
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static const struct tok bootp_op_values[] = {
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{ BOOTPREQUEST, "Request" },
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{ BOOTPREPLY, "Reply" },
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{ 0, NULL}
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};
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/*
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* Print bootp requests
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*/
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void
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bootp_print(register const u_char *cp, u_int length)
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{
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register const struct bootp *bp;
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static const u_char vm_cmu[4] = VM_CMU;
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static const u_char vm_rfc1048[4] = VM_RFC1048;
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bp = (const struct bootp *)cp;
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TCHECK(bp->bp_op);
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printf("BOOTP/DHCP, %s",
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tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op));
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if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
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TCHECK2(bp->bp_chaddr[0], 6);
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printf(" from %s", etheraddr_string(bp->bp_chaddr));
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}
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printf(", length: %u", length);
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if (!vflag)
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return;
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TCHECK(bp->bp_secs);
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/* The usual hardware address type is 1 (10Mb Ethernet) */
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if (bp->bp_htype != 1)
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printf(", htype-#%d", bp->bp_htype);
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/* The usual length for 10Mb Ethernet address is 6 bytes */
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if (bp->bp_htype != 1 || bp->bp_hlen != 6)
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printf(", hlen:%d", bp->bp_hlen);
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/* Only print interesting fields */
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if (bp->bp_hops)
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printf(", hops:%d", bp->bp_hops);
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if (bp->bp_xid)
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printf(", xid:0x%x", EXTRACT_32BITS(&bp->bp_xid));
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if (bp->bp_secs)
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printf(", secs:%d", EXTRACT_16BITS(&bp->bp_secs));
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printf(", flags: [%s]",
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bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)));
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if (vflag>1)
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printf( " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags));
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/* Client's ip address */
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TCHECK(bp->bp_ciaddr);
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if (bp->bp_ciaddr.s_addr)
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printf("\n\t Client IP: %s", ipaddr_string(&bp->bp_ciaddr));
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/* 'your' ip address (bootp client) */
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TCHECK(bp->bp_yiaddr);
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if (bp->bp_yiaddr.s_addr)
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printf("\n\t Your IP: %s", ipaddr_string(&bp->bp_yiaddr));
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/* Server's ip address */
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TCHECK(bp->bp_siaddr);
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if (bp->bp_siaddr.s_addr)
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printf("\n\t Server IP: %s", ipaddr_string(&bp->bp_siaddr));
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/* Gateway's ip address */
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TCHECK(bp->bp_giaddr);
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if (bp->bp_giaddr.s_addr)
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printf("\n\t Gateway IP: %s", ipaddr_string(&bp->bp_giaddr));
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/* Client's Ethernet address */
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if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
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TCHECK2(bp->bp_chaddr[0], 6);
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printf("\n\t Client Ethernet Address: %s", etheraddr_string(bp->bp_chaddr));
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}
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TCHECK2(bp->bp_sname[0], 1); /* check first char only */
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if (*bp->bp_sname) {
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printf("\n\t sname \"");
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if (fn_print(bp->bp_sname, snapend)) {
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putchar('"');
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fputs(tstr + 1, stdout);
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return;
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}
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putchar('"');
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}
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TCHECK2(bp->bp_file[0], 1); /* check first char only */
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if (*bp->bp_file) {
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printf("\n\t file \"");
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if (fn_print(bp->bp_file, snapend)) {
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putchar('"');
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fputs(tstr + 1, stdout);
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return;
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}
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putchar('"');
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}
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/* Decode the vendor buffer */
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TCHECK(bp->bp_vend[0]);
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if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
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sizeof(u_int32_t)) == 0)
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rfc1048_print(bp->bp_vend);
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else if (memcmp((const char *)bp->bp_vend, vm_cmu,
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sizeof(u_int32_t)) == 0)
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cmu_print(bp->bp_vend);
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else {
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u_int32_t ul;
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ul = EXTRACT_32BITS(&bp->bp_vend);
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if (ul != 0)
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printf("\n\t Vendor-#0x%x", ul);
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}
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return;
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trunc:
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fputs(tstr, stdout);
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}
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/*
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* The first character specifies the format to print:
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* i - ip address (32 bits)
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* p - ip address pairs (32 bits + 32 bits)
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* l - long (32 bits)
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* L - unsigned long (32 bits)
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* s - short (16 bits)
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* b - period-seperated decimal bytes (variable length)
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* x - colon-seperated hex bytes (variable length)
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* a - ascii string (variable length)
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* B - on/off (8 bits)
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* $ - special (explicit code to handle)
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*/
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static struct tok tag2str[] = {
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/* RFC1048 tags */
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{ TAG_PAD, " PAD" },
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{ TAG_SUBNET_MASK, "iSM" }, /* subnet mask (RFC950) */
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{ TAG_TIME_OFFSET, "LTZ" }, /* seconds from UTC */
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{ TAG_GATEWAY, "iDG" }, /* default gateway */
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{ TAG_TIME_SERVER, "iTS" }, /* time servers (RFC868) */
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{ TAG_NAME_SERVER, "iIEN" }, /* IEN name servers (IEN116) */
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{ TAG_DOMAIN_SERVER, "iNS" }, /* domain name (RFC1035) */
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{ TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */
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{ TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */
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{ TAG_LPR_SERVER, "iLPR" }, /* lpr server (RFC1179) */
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{ TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */
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{ TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */
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{ TAG_HOSTNAME, "aHN" }, /* ascii hostname */
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{ TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
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{ TAG_END, " END" },
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/* RFC1497 tags */
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{ TAG_DUMPPATH, "aDP" },
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{ TAG_DOMAINNAME, "aDN" },
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{ TAG_SWAP_SERVER, "iSS" },
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{ TAG_ROOTPATH, "aRP" },
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{ TAG_EXTPATH, "aEP" },
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/* RFC2132 tags */
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{ TAG_IP_FORWARD, "BIPF" },
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{ TAG_NL_SRCRT, "BSRT" },
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{ TAG_PFILTERS, "pPF" },
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{ TAG_REASS_SIZE, "sRSZ" },
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{ TAG_DEF_TTL, "bTTL" },
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{ TAG_MTU_TIMEOUT, "lMA" },
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{ TAG_MTU_TABLE, "sMT" },
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{ TAG_INT_MTU, "sMTU" },
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{ TAG_LOCAL_SUBNETS, "BLSN" },
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{ TAG_BROAD_ADDR, "iBR" },
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{ TAG_DO_MASK_DISC, "BMD" },
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{ TAG_SUPPLY_MASK, "BMS" },
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{ TAG_DO_RDISC, "BRD" },
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{ TAG_RTR_SOL_ADDR, "iRSA" },
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{ TAG_STATIC_ROUTE, "pSR" },
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{ TAG_USE_TRAILERS, "BUT" },
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{ TAG_ARP_TIMEOUT, "lAT" },
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{ TAG_ETH_ENCAP, "BIE" },
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{ TAG_TCP_TTL, "bTT" },
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{ TAG_TCP_KEEPALIVE, "lKI" },
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{ TAG_KEEPALIVE_GO, "BKG" },
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{ TAG_NIS_DOMAIN, "aYD" },
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{ TAG_NIS_SERVERS, "iYS" },
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{ TAG_NTP_SERVERS, "iNTP" },
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{ TAG_VENDOR_OPTS, "bVO" },
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{ TAG_NETBIOS_NS, "iWNS" },
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{ TAG_NETBIOS_DDS, "iWDD" },
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{ TAG_NETBIOS_NODE, "$WNT" },
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{ TAG_NETBIOS_SCOPE, "aWSC" },
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{ TAG_XWIN_FS, "iXFS" },
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{ TAG_XWIN_DM, "iXDM" },
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{ TAG_NIS_P_DOMAIN, "sN+D" },
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{ TAG_NIS_P_SERVERS, "iN+S" },
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{ TAG_MOBILE_HOME, "iMH" },
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{ TAG_SMPT_SERVER, "iSMTP" },
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{ TAG_POP3_SERVER, "iPOP3" },
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{ TAG_NNTP_SERVER, "iNNTP" },
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{ TAG_WWW_SERVER, "iWWW" },
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{ TAG_FINGER_SERVER, "iFG" },
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{ TAG_IRC_SERVER, "iIRC" },
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{ TAG_STREETTALK_SRVR, "iSTS" },
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{ TAG_STREETTALK_STDA, "iSTDA" },
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{ TAG_REQUESTED_IP, "iRQ" },
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{ TAG_IP_LEASE, "lLT" },
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{ TAG_OPT_OVERLOAD, "$OO" },
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{ TAG_TFTP_SERVER, "aTFTP" },
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{ TAG_BOOTFILENAME, "aBF" },
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{ TAG_DHCP_MESSAGE, " DHCP" },
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{ TAG_SERVER_ID, "iSID" },
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{ TAG_PARM_REQUEST, "bPR" },
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{ TAG_MESSAGE, "aMSG" },
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{ TAG_MAX_MSG_SIZE, "sMSZ" },
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{ TAG_RENEWAL_TIME, "lRN" },
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{ TAG_REBIND_TIME, "lRB" },
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{ TAG_VENDOR_CLASS, "aVC" },
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{ TAG_CLIENT_ID, "$CID" },
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/* RFC 2485 */
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{ TAG_OPEN_GROUP_UAP, "aUAP" },
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/* RFC 2563 */
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{ TAG_DISABLE_AUTOCONF, "BNOAUTO" },
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/* RFC 2610 */
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{ TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */
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{ TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */
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/* RFC 2937 */
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{ TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */
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/* RFC 3011 */
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{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
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/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
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{ TAG_USER_CLASS, "aCLASS" },
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{ TAG_SLP_NAMING_AUTH, "aSLP-NA" },
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{ TAG_CLIENT_FQDN, "$FQDN" },
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{ TAG_AGENT_CIRCUIT, "bACKT" },
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{ TAG_AGENT_REMOTE, "bARMT" },
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{ TAG_AGENT_MASK, "bAMSK" },
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{ TAG_TZ_STRING, "aTZSTR" },
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{ TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */
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{ TAG_AUTH, "bAUTH" }, /* XXX 'b' */
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{ TAG_VINES_SERVERS, "iVINES" },
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{ TAG_SERVER_RANK, "sRANK" },
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{ TAG_CLIENT_ARCH, "sARCH" },
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{ TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */
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{ TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */
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{ TAG_LDAP_URL, "aLDAP" },
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{ TAG_6OVER4, "i6o4" },
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{ TAG_PRINTER_NAME, "aPRTR" },
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{ TAG_MDHCP_SERVER, "bMDHCP" }, /* XXX 'b' */
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{ TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */
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{ TAG_NETINFO_PARENT, "iNI" },
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{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
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{ TAG_URL, "aURL" },
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{ TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
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{ 0, NULL }
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};
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/* 2-byte extended tags */
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static struct tok xtag2str[] = {
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{ 0, NULL }
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};
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/* DHCP "options overload" types */
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static struct tok oo2str[] = {
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{ 1, "file" },
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{ 2, "sname" },
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{ 3, "file+sname" },
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{ 0, NULL }
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};
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/* NETBIOS over TCP/IP node type options */
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static struct tok nbo2str[] = {
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{ 0x1, "b-node" },
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{ 0x2, "p-node" },
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{ 0x4, "m-node" },
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{ 0x8, "h-node" },
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{ 0, NULL }
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};
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/* ARP Hardware types, for Client-ID option */
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static struct tok arp2str[] = {
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{ 0x1, "ether" },
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{ 0x6, "ieee802" },
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{ 0x7, "arcnet" },
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{ 0xf, "frelay" },
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{ 0x17, "strip" },
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{ 0x18, "ieee1394" },
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{ 0, NULL }
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};
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static void
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rfc1048_print(register const u_char *bp)
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{
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register u_int16_t tag;
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register u_int len, size;
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register const char *cp;
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register char c;
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int first;
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u_int32_t ul;
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u_int16_t us;
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u_int8_t uc;
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printf("\n\t Vendor-rfc1048:");
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/* Step over magic cookie */
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bp += sizeof(int32_t);
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/* Loop while we there is a tag left in the buffer */
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while (bp + 1 < snapend) {
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tag = *bp++;
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if (tag == TAG_PAD)
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continue;
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if (tag == TAG_END)
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return;
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if (tag == TAG_EXTENDED_OPTION) {
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TCHECK2(*(bp + 1), 2);
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tag = EXTRACT_16BITS(bp + 1);
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/* XXX we don't know yet if the IANA will
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* preclude overlap of 1-byte and 2-byte spaces.
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* If not, we need to offset tag after this step.
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*/
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cp = tok2str(xtag2str, "?xT%u", tag);
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} else
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cp = tok2str(tag2str, "?T%u", tag);
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c = *cp++;
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printf("\n\t %s:", cp);
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/* Get the length; check for truncation */
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if (bp + 1 >= snapend) {
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fputs(tstr, stdout);
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return;
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}
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len = *bp++;
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if (bp + len >= snapend) {
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printf("[|bootp %u]", len);
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return;
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}
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if (tag == TAG_DHCP_MESSAGE && len == 1) {
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uc = *bp++;
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switch (uc) {
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case DHCPDISCOVER: printf("DISCOVER"); break;
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case DHCPOFFER: printf("OFFER"); break;
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case DHCPREQUEST: printf("REQUEST"); break;
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case DHCPDECLINE: printf("DECLINE"); break;
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case DHCPACK: printf("ACK"); break;
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case DHCPNAK: printf("NACK"); break;
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case DHCPRELEASE: printf("RELEASE"); break;
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case DHCPINFORM: printf("INFORM"); break;
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default: printf("%u", uc); break;
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}
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continue;
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}
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if (tag == TAG_PARM_REQUEST) {
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first = 1;
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while (len-- > 0) {
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uc = *bp++;
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cp = tok2str(tag2str, "?T%u", uc);
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if (!first)
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putchar('+');
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printf("%s", cp + 1);
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first = 0;
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}
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continue;
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}
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if (tag == TAG_EXTENDED_REQUEST) {
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first = 1;
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while (len > 1) {
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len -= 2;
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us = EXTRACT_16BITS(bp);
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bp += 2;
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cp = tok2str(xtag2str, "?xT%u", us);
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if (!first)
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putchar('+');
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printf("%s", cp + 1);
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first = 0;
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}
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continue;
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}
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/* Print data */
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size = len;
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if (c == '?') {
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/* Base default formats for unknown tags on data size */
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if (size & 1)
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c = 'b';
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else if (size & 2)
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c = 's';
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else
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c = 'l';
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}
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first = 1;
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switch (c) {
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case 'a':
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/* ascii strings */
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putchar('"');
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(void)fn_printn(bp, size, NULL);
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putchar('"');
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bp += size;
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size = 0;
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break;
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case 'i':
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case 'l':
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case 'L':
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/* ip addresses/32-bit words */
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while (size >= sizeof(ul)) {
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if (!first)
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putchar(',');
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ul = EXTRACT_32BITS(bp);
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if (c == 'i') {
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ul = htonl(ul);
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printf("%s", ipaddr_string(&ul));
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} else if (c == 'L')
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printf("%d", ul);
|
|
else
|
|
printf("%u", ul);
|
|
bp += sizeof(ul);
|
|
size -= sizeof(ul);
|
|
first = 0;
|
|
}
|
|
break;
|
|
|
|
case 'p':
|
|
/* IP address pairs */
|
|
while (size >= 2*sizeof(ul)) {
|
|
if (!first)
|
|
putchar(',');
|
|
memcpy((char *)&ul, (const char *)bp, sizeof(ul));
|
|
printf("(%s:", ipaddr_string(&ul));
|
|
bp += sizeof(ul);
|
|
memcpy((char *)&ul, (const char *)bp, sizeof(ul));
|
|
printf("%s)", ipaddr_string(&ul));
|
|
bp += sizeof(ul);
|
|
size -= 2*sizeof(ul);
|
|
first = 0;
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
/* shorts */
|
|
while (size >= sizeof(us)) {
|
|
if (!first)
|
|
putchar(',');
|
|
us = EXTRACT_16BITS(bp);
|
|
printf("%u", us);
|
|
bp += sizeof(us);
|
|
size -= sizeof(us);
|
|
first = 0;
|
|
}
|
|
break;
|
|
|
|
case 'B':
|
|
/* boolean */
|
|
while (size > 0) {
|
|
if (!first)
|
|
putchar(',');
|
|
switch (*bp) {
|
|
case 0:
|
|
putchar('N');
|
|
break;
|
|
case 1:
|
|
putchar('Y');
|
|
break;
|
|
default:
|
|
printf("%u?", *bp);
|
|
break;
|
|
}
|
|
++bp;
|
|
--size;
|
|
first = 0;
|
|
}
|
|
break;
|
|
|
|
case 'b':
|
|
case 'x':
|
|
default:
|
|
/* Bytes */
|
|
while (size > 0) {
|
|
if (!first)
|
|
putchar(c == 'x' ? ':' : '.');
|
|
if (c == 'x')
|
|
printf("%02x", *bp);
|
|
else
|
|
printf("%u", *bp);
|
|
++bp;
|
|
--size;
|
|
first = 0;
|
|
}
|
|
break;
|
|
|
|
case '$':
|
|
/* Guys we can't handle with one of the usual cases */
|
|
switch (tag) {
|
|
|
|
case TAG_NETBIOS_NODE:
|
|
tag = *bp++;
|
|
--size;
|
|
fputs(tok2str(nbo2str, NULL, tag), stdout);
|
|
break;
|
|
|
|
case TAG_OPT_OVERLOAD:
|
|
tag = *bp++;
|
|
--size;
|
|
fputs(tok2str(oo2str, NULL, tag), stdout);
|
|
break;
|
|
|
|
case TAG_CLIENT_FQDN:
|
|
if (*bp++)
|
|
printf("[svrreg]");
|
|
if (*bp)
|
|
printf("%u/%u/", *bp, *(bp+1));
|
|
bp += 2;
|
|
putchar('"');
|
|
(void)fn_printn(bp, size - 3, NULL);
|
|
putchar('"');
|
|
bp += size - 3;
|
|
size = 0;
|
|
break;
|
|
|
|
case TAG_CLIENT_ID:
|
|
{ int type = *bp++;
|
|
size--;
|
|
if (type == 0) {
|
|
putchar('"');
|
|
(void)fn_printn(bp, size, NULL);
|
|
putchar('"');
|
|
bp += size;
|
|
size = 0;
|
|
break;
|
|
} else {
|
|
printf("[%s]", tok2str(arp2str, "type-%d", type));
|
|
}
|
|
while (size > 0) {
|
|
if (!first)
|
|
putchar(':');
|
|
printf("%02x", *bp);
|
|
++bp;
|
|
--size;
|
|
first = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
printf("[unknown special tag %u, size %u]",
|
|
tag, size);
|
|
bp += size;
|
|
size = 0;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
/* Data left over? */
|
|
if (size) {
|
|
printf("[len %u]", len);
|
|
bp += size;
|
|
}
|
|
}
|
|
return;
|
|
trunc:
|
|
printf("|[rfc1048]");
|
|
}
|
|
|
|
static void
|
|
cmu_print(register const u_char *bp)
|
|
{
|
|
register const struct cmu_vend *cmu;
|
|
|
|
#define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
|
|
if (cmu->m.s_addr != 0) \
|
|
printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
|
|
|
|
printf(" vend-cmu");
|
|
cmu = (const struct cmu_vend *)bp;
|
|
|
|
/* Only print if there are unknown bits */
|
|
TCHECK(cmu->v_flags);
|
|
if ((cmu->v_flags & ~(VF_SMASK)) != 0)
|
|
printf(" F:0x%x", cmu->v_flags);
|
|
PRINTCMUADDR(v_dgate, "DG");
|
|
PRINTCMUADDR(v_smask, cmu->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:
|
|
fputs(tstr, stdout);
|
|
#undef PRINTCMUADDR
|
|
}
|