354 lines
8.8 KiB
C
354 lines
8.8 KiB
C
/*
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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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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.14 2001/09/17 21:57:59 fenner Exp $";
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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 <sys/param.h>
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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 <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 const 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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{ 8193, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, },
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{ 8194, OL6_16N, "Domain Name Server", OT6_V6, },
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{ 8195, OL6_N, "Domain Name", OT6_STR, },
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{ 8196, OL6_N, "SLP Agent", OT6_NONE, },
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{ 8197, OL6_N, "SLP Scope" , OT6_NONE, },
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{ 8198, OL6_16N, "Network Time Protocol Servers", OT6_V6, },
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{ 8199, OL6_N, "NIS Domain", OT6_STR, },
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{ 8200, OL6_16N, "NIS Servers", OT6_V6, },
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{ 8201, OL6_N, "NIS+ Domain", OT6_STR, },
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{ 8202, OL6_16N, "NIS+ Servers", OT6_V6, },
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/* TCP Parameters */
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{ 8203, 4, "TCP Keepalive Interval", OT6_NUM, },
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/* DHCPv6 Extensions */
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{ 8204, 4, "Maximum DHCPv6 Message Size", OT6_NUM, },
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{ 8205, OL6_N, "DHCP Retransmission and Configuration Parameter",
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OT6_NONE, },
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{ 8206, OL6_N, "Extension Request", OT6_NONE, },
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{ 8207, OL6_N, "Subnet Prefix", OT6_NONE, },
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{ 8208, OL6_N, "Platform Specific Information", OT6_NONE, },
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{ 8209, OL6_N, "Platform Class Identifier", OT6_STR, },
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{ 8210, OL6_N, "Class Identifier", OT6_STR, },
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{ 8211, 16, "Reconfigure Multicast Address", OT6_V6, },
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{ 8212, 16, "Renumber DHCPv6 Server Address",
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OT6_V6, },
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{ 8213, OL6_N, "Client-Server Authentication", OT6_NONE, },
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{ 8214, 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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while (cp < ep) {
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if (ep - cp < sizeof(u_int16_t))
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break;
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code = ntohs(*(u_int16_t *)&cp[0]);
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if (ep - cp < sizeof(u_int16_t) * 2)
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break;
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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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if (ep - cp < len + 4)
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break;
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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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strncpy(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(register const u_char *cp, u_int length,
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u_int16_t sport, u_int16_t 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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u_int16_t field16;
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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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break;
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}
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printf(" solicit ("); /*)*/
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if (dh6->dh6_sol.dh6sol_flags != 0) {
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u_int8_t f = dh6->dh6_sol.dh6sol_flags;
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printf("%s%s ",
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(f & DH6SOL_PREFIX) ? "P" : "",
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(f & DH6SOL_CLOSE) ? "C" : "");
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}
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memcpy(&field16, &dh6->dh6_sol.dh6sol_plen_id,
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sizeof(field16));
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field16 = ntohs(field16);
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if (field16 & ~DH6SOL_SOLICIT_PLEN_MASK)
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printf("plen=%d ", DH6SOL_SOLICIT_PLEN(field16));
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printf("solicit-ID=%d", DH6SOL_SOLICIT_ID(field16));
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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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/*(*/
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printf(")");
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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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memcpy(&field16, &dh6->dh6_adv.dh6adv_rsv_id, sizeof(field16));
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printf("solicit-ID=%d",
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ntohs(field16) & DH6SOL_SOLICIT_ID_MASK);
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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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/*(*/
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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 != 0) {
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u_int8_t f = dh6->dh6_req.dh6req_flags;
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printf("%s%s ",
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(f & DH6REQ_CLOSE) ? "C" : "",
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(f & DH6REQ_REBOOT) ? "R" : "");
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}
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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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printf(" servaddr=%s",
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ip6addr_string(&dh6->dh6_req.dh6req_serveraddr));
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dhcp6ext_print((char *)(&dh6->dh6_req + 1), ep);
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/*(*/
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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_RELAYPRESENT) != 0)
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printf("R ");
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printf("stat=0x%02x",
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dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK);
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printf(" xid=0x%04x", dh6->dh6_rep.dh6rep_xid);
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printf(" cliaddr=%s",
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ip6addr_string(&dh6->dh6_rep.dh6rep_cliaddr));
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extp = (u_char *)((&dh6->dh6_rep) + 1);
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if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) !=
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0) {
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printf(" relayaddr=%s", ip6addr_string(extp));
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extp += sizeof(struct in6_addr);
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}
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dhcp6ext_print(extp, ep);
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/*(*/
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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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