GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/tcpdump/print-dhcp6.c Lines: 0 127 0.0 %
Date: 2017-11-07 Branches: 0 93 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: print-dhcp6.c,v 1.10 2015/11/18 15:36:20 mmcc Exp $	*/
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/*
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 * Copyright (C) 1998 and 1999 WIDE Project.
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 * 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 the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the project nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifdef INET6
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#include <sys/time.h>
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#include <sys/socket.h>
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struct mbuf;
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struct rtentry;
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#include <net/if.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "dhcp6.h"
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#include "dhcp6opt.h"
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#if 0
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static void dhcp6opttab_init(void);
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static struct dhcp6_opt *dhcp6opttab_byname(char *);
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#endif
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static struct dhcp6_opt *dhcp6opttab_bycode(u_int);
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static char tstr[] = " [|dhcp6]";
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static struct dhcp6_opt dh6opttab[] = {
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	/* IP Address Extension */
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	{ 1, OL6_N,	"IP Address",			OT6_NONE, },
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	/* General Extension */
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	{ 2, 4,		"Time Offset",			OT6_NUM, },
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	{ 3, OL6_N,	"IEEE 1003.1 POSIX Timezone",	OT6_STR, },
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	{ 6, OL6_16N,	"Domain Name Server",		OT6_V6, },
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	{ 10, OL6_N,	"Domain Name",			OT6_STR, },
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	/* Application and Service Parameters */
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	{ 16, OL6_N,	"Directory Agent",		OT6_NONE, },
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	{ 17, OL6_N,	"Service Scope"	,		OT6_NONE, },
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	{ 18, OL6_16N,	"Network Time Protocol Servers", OT6_V6, },
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	{ 19, OL6_N,	"NIS Domain",			OT6_STR, },
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	{ 20, OL6_16N,	"NIS Servers",			OT6_V6, },
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	{ 21, OL6_N,	"NIS+ Domain",			OT6_STR, },
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	{ 22, OL6_16N,	"NIS+ Servers",			OT6_V6, },
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	/* TCP Parameters */
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	{ 32, 4,	"TCP Keepalive Interval",	OT6_NUM, },
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	/* DHCPv6 Extensions */
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	{ 40, 4,	"Maximum DHCPv6 Message Size",	OT6_NUM, },
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	{ 41, OL6_N,	"DHCP Retransmission and Configuration Parameter",
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							OT6_NONE, },
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	{ 48, OL6_N,	"Platform Specific Information", OT6_NONE, },
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	{ 49, OL6_N,	"Platform Class Identifier",	OT6_STR, },
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	{ 64, OL6_N,	"Class Identifier",		OT6_STR, },
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	{ 66, 16,	"Reconfigure Multicast Address", OT6_V6, },
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	{ 67, 16,	"Renumber DHCPv6 Server Address",
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							OT6_V6, },
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	{ 68, OL6_N,	"DHCP Relay ICMP Error Message", OT6_NONE, },
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	{ 84, OL6_N,	"Client-Server Authentication",	OT6_NONE, },
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	{ 85, 4,	"Client Key Selection",		OT6_NUM, },
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	/* End Extension */
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	{ 65536, OL6_Z,	"End",				OT6_NONE, },
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	{ 0 },
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};
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#if 0
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static struct dhcp6_opt *dh6o_pad;
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static struct dhcp6_opt *dh6o_end;
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static void
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dhcp6opttab_init()
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{
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	dh6o_pad = dhcp6opttab_bycode(0);
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	dh6o_end = dhcp6opttab_bycode(65536);
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}
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#endif
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#if 0
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static struct dhcp6_opt *
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dhcp6opttab_byname(name)
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	char *name;
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{
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	struct dhcp6_opt *p;
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	for (p = dh6opttab; p->code; p++)
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		if (strcmp(name, p->name) == 0)
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			return p;
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	return NULL;
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}
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#endif
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static struct dhcp6_opt *
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dhcp6opttab_bycode(code)
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	u_int code;
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{
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	struct dhcp6_opt *p;
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	for (p = dh6opttab; p->code; p++)
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		if (p->code == code)
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			return p;
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	return NULL;
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}
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static void
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dhcp6ext_print(u_char *cp, u_char *ep)
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{
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	u_int16_t code, len;
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	struct dhcp6_opt *p;
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	char buf[BUFSIZ];
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	int i;
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	if (cp == ep)
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		return;
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	printf(" ");
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	while (cp < ep) {
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		code = ntohs(*(u_int16_t *)&cp[0]);
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		if (code != 65535)
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			len = ntohs(*(u_int16_t *)&cp[2]);
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		else
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			len = 0;
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		p = dhcp6opttab_bycode(code);
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		if (p == NULL) {
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			printf("(unknown, len=%d)", len);
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			cp += len + 4;
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			continue;
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		}
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		/* sanity check on length */
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		switch (p->len) {
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		case OL6_N:
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			break;
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		case OL6_16N:
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			if (len % 16 != 0)
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				goto trunc;
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			break;
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		case OL6_Z:
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			if (len != 0)
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				goto trunc;
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			break;
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		default:
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			if (len != p->len)
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				goto trunc;
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			break;
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		}
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		if (cp + 4 + len > ep) {
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			printf("[|%s]", p->name);
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			return;
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		}
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		printf("(%s, ", p->name);
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		switch (p->type) {
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		case OT6_V6:
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			for (i = 0; i < len; i += 16) {
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				inet_ntop(AF_INET6, &cp[4 + i], buf,
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					sizeof(buf));
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				if (i != 0)
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					printf(",");
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				printf("%s", buf);
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			}
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			break;
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		case OT6_STR:
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			memset(&buf, 0, sizeof(buf));
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			strlcpy(buf, &cp[4], len);
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			printf("%s", buf);
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			break;
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		case OT6_NUM:
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			printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4]));
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			break;
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		default:
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			for (i = 0; i < len; i++)
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				printf("%02x", cp[4 + i] & 0xff);
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		}
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		printf(")");
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		cp += len + 4;
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	}
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	return;
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trunc:
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	printf("[|dhcp6ext]");
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}
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/*
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 * Print dhcp6 requests
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 */
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void
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dhcp6_print(const u_char *cp, u_int length,
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	    u_short sport, u_short dport)
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{
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	union dhcp6 *dh6;
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	u_char *ep;
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	u_char *extp;
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	printf("dhcp6");
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	ep = (u_char *)snapend;
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	dh6 = (union dhcp6 *)cp;
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	TCHECK(dh6->dh6_msgtype);
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	switch (dh6->dh6_msgtype) {
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	case DH6_SOLICIT:
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		if (vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr)) {
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			printf(" solicit(");
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			if ((dh6->dh6_sol.dh6sol_flags & DH6SOL_CLOSE) != 0)
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				printf("C");
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			if (dh6->dh6_sol.dh6sol_flags != 0)
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				printf(" ");
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			printf("cliaddr=%s",
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				ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr));
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			printf(" relayaddr=%s",
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				ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr));
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			printf(")");
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		} else
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			printf(" solicit");
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		break;
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	case DH6_ADVERT:
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		if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) {
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			printf(" advert");
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			break;
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		}
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		printf(" advert(");
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		if ((dh6->dh6_adv.dh6adv_flags & DH6ADV_SERVPRESENT) != 0)
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			printf("S");
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		if (dh6->dh6_adv.dh6adv_flags != 0)
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			printf(" ");
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		printf("pref=%u", dh6->dh6_adv.dh6adv_pref);
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		printf(" cliaddr=%s",
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			ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr));
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		printf(" relayaddr=%s",
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			ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr));
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		printf(" servaddr=%s",
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			ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr));
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		extp = (u_char *)((&dh6->dh6_adv) + 1);
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		dhcp6ext_print(extp, ep);
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		printf(")");
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		break;
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	case DH6_REQUEST:
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		if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) {
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			printf(" request");
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			break;
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		}
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		printf(" request(");
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		if ((dh6->dh6_req.dh6req_flags & DH6REQ_CLOSE) != 0)
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			printf("C");
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		if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0)
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			printf("S");
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		if ((dh6->dh6_req.dh6req_flags & DH6REQ_REBOOT) != 0)
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			printf("R");
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		if (dh6->dh6_req.dh6req_flags != 0)
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			printf(" ");
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		printf("xid=0x%04x", dh6->dh6_req.dh6req_xid);
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		printf(" cliaddr=%s",
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			ip6addr_string(&dh6->dh6_req.dh6req_cliaddr));
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		printf(" relayaddr=%s",
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			ip6addr_string(&dh6->dh6_req.dh6req_relayaddr));
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		extp = (char *)((&dh6->dh6_req) + 1);
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		if ((dh6->dh6_req.dh6req_flags & DH6REQ_SERVPRESENT) != 0) {
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			printf(" servaddr=%s", ip6addr_string(extp));
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			extp += 16;
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		}
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		dhcp6ext_print(extp, ep);
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		printf(")");
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		break;
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	case DH6_REPLY:
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		if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) {
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			printf(" reply");
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			break;
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		}
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		printf(" reply(");
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		if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0)
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			printf("C");
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		if (dh6->dh6_rep.dh6rep_flagandstat != 0)
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			printf(" ");
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		printf("stat=0x%02x",
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			dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK);
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		extp = (u_char *)((&dh6->dh6_rep) + 1);
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		if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_CLIPRESENT) != 0) {
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			printf(" cliaddr=%s", ip6addr_string(extp));
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			extp += 16;
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		}
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		dhcp6ext_print(extp, ep);
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		printf(")");
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		break;
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	case DH6_RELEASE:
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		printf(" release");
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		break;
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	case DH6_RECONFIG:
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		printf(" reconfig");
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		break;
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	}
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	return;
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trunc:
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	printf("%s", tstr);
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}
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#endif /* INET6 */