575 lines
15 KiB
C
575 lines
15 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
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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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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.2.2.1 2000/01/11 06:58:24 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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#ifdef INET6
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#include <ctype.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include "interface.h"
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#include "addrtoname.h"
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void icmp6_opt_print(const u_char *, int);
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void mld6_print(const u_char *);
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void
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icmp6_print(register const u_char *bp, register const u_char *bp2)
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{
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register const struct icmp6_hdr *dp;
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register const struct ip6_hdr *ip;
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register const char *str;
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register const struct ip6_hdr *oip;
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register const struct udphdr *ouh;
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register int hlen, dport;
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register const u_char *ep;
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char buf[256];
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int icmp6len;
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#if 0
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#define TCHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) goto trunc
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#endif
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dp = (struct icmp6_hdr *)bp;
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ip = (struct ip6_hdr *)bp2;
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oip = (struct ip6_hdr *)(dp + 1);
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str = buf;
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/* 'ep' points to the end of avaible data. */
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ep = snapend;
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if (ip->ip6_plen)
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icmp6len = (ntohs(ip->ip6_plen) + sizeof(struct ip6_hdr) -
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(bp - bp2));
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else /* XXX: jumbo payload case... */
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icmp6len = snapend - bp;
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#if 0
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(void)printf("%s > %s: ",
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ip6addr_string(&ip->ip6_src),
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ip6addr_string(&ip->ip6_dst));
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#endif
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TCHECK(dp->icmp6_code);
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switch(dp->icmp6_type) {
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case ICMP6_DST_UNREACH:
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TCHECK(oip->ip6_dst);
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switch (dp->icmp6_code) {
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case ICMP6_DST_UNREACH_NOROUTE:
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printf("icmp6: %s unreachable route",
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ip6addr_string(&oip->ip6_dst));
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break;
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case ICMP6_DST_UNREACH_ADMIN:
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printf("icmp6: %s unreachable prohibited",
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ip6addr_string(&oip->ip6_dst));
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break;
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#ifdef ICMP6_DST_UNREACH_BEYONDSCOPE
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case ICMP6_DST_UNREACH_BEYONDSCOPE:
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#else
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case ICMP6_DST_UNREACH_NOTNEIGHBOR:
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#endif
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printf("icmp6: %s beyond scope of source address %s",
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ip6addr_string(&oip->ip6_dst),
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ip6addr_string(&oip->ip6_src));
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break;
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case ICMP6_DST_UNREACH_ADDR:
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printf("icmp6: %s unreachable address",
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ip6addr_string(&oip->ip6_dst));
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break;
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case ICMP6_DST_UNREACH_NOPORT:
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TCHECK(oip->ip6_nxt);
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hlen = sizeof(struct ip6_hdr);
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ouh = (struct udphdr *)(((u_char *)oip) + hlen);
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dport = ntohs(ouh->uh_dport);
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switch (oip->ip6_nxt) {
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case IPPROTO_TCP:
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printf("icmp6: %s tcp port %s unreachable",
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ip6addr_string(&oip->ip6_dst),
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tcpport_string(dport));
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break;
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case IPPROTO_UDP:
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printf("icmp6: %s udp port %s unreachable",
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ip6addr_string(&oip->ip6_dst),
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udpport_string(dport));
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break;
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default:
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printf("icmp6: %s protocol %d port %d unreachable",
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ip6addr_string(&oip->ip6_dst),
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oip->ip6_nxt, dport);
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break;
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}
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break;
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default:
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printf("icmp6: %s unreachable code-#%d",
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ip6addr_string(&oip->ip6_dst),
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dp->icmp6_code);
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break;
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}
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break;
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case ICMP6_PACKET_TOO_BIG:
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TCHECK(dp->icmp6_mtu);
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printf("icmp6: too big %u\n", (u_int32_t)ntohl(dp->icmp6_mtu));
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break;
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case ICMP6_TIME_EXCEEDED:
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TCHECK(oip->ip6_dst);
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switch (dp->icmp6_code) {
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case ICMP6_TIME_EXCEED_TRANSIT:
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printf("icmp6: time exceeded in-transit for %s",
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ip6addr_string(&oip->ip6_dst));
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break;
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case ICMP6_TIME_EXCEED_REASSEMBLY:
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printf("icmp6: ip6 reassembly time exceeded");
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break;
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default:
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printf("icmp6: time exceeded code-#%d",
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dp->icmp6_code);
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break;
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}
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break;
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case ICMP6_PARAM_PROB:
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TCHECK(oip->ip6_dst);
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switch (dp->icmp6_code) {
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case ICMP6_PARAMPROB_HEADER:
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printf("icmp6: parameter problem errorneous - octet %u\n",
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(u_int32_t)ntohl(dp->icmp6_pptr));
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break;
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case ICMP6_PARAMPROB_NEXTHEADER:
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printf("icmp6: parameter problem next header - octet %u\n",
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(u_int32_t)ntohl(dp->icmp6_pptr));
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break;
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case ICMP6_PARAMPROB_OPTION:
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printf("icmp6: parameter problem option - octet %u\n",
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(u_int32_t)ntohl(dp->icmp6_pptr));
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break;
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default:
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printf("icmp6: parameter problem code-#%d",
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dp->icmp6_code);
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break;
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}
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break;
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case ICMP6_ECHO_REQUEST:
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printf("icmp6: echo request");
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break;
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case ICMP6_ECHO_REPLY:
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printf("icmp6: echo reply");
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break;
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case ICMP6_MEMBERSHIP_QUERY:
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printf("icmp6: multicast listener query ");
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mld6_print((const u_char *)dp);
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break;
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case ICMP6_MEMBERSHIP_REPORT:
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printf("icmp6: multicast listener report ");
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mld6_print((const u_char *)dp);
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break;
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case ICMP6_MEMBERSHIP_REDUCTION:
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printf("icmp6: multicast listener done ");
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mld6_print((const u_char *)dp);
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break;
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case ND_ROUTER_SOLICIT:
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printf("icmp6: router solicitation ");
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if (vflag) {
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#define RTSOLLEN 8
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icmp6_opt_print((const u_char *)dp + RTSOLLEN,
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icmp6len - RTSOLLEN);
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}
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break;
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case ND_ROUTER_ADVERT:
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printf("icmp6: router advertisement");
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if (vflag) {
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struct nd_router_advert *p;
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p = (struct nd_router_advert *)dp;
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TCHECK(p->nd_ra_retransmit);
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printf("(chlim=%d, ", (int)p->nd_ra_curhoplimit);
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if (p->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED)
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printf("M");
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if (p->nd_ra_flags_reserved & ND_RA_FLAG_OTHER)
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printf("O");
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if (p->nd_ra_flags_reserved != 0)
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printf(" ");
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printf("router_ltime=%d, ", ntohs(p->nd_ra_router_lifetime));
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printf("reachable_time=%u, ",
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(u_int32_t)ntohl(p->nd_ra_reachable));
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printf("retrans_time=%u)",
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(u_int32_t)ntohl(p->nd_ra_retransmit));
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#define RTADVLEN 16
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icmp6_opt_print((const u_char *)dp + RTADVLEN,
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icmp6len - RTADVLEN);
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}
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break;
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case ND_NEIGHBOR_SOLICIT:
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{
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struct nd_neighbor_solicit *p;
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p = (struct nd_neighbor_solicit *)dp;
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TCHECK(p->nd_ns_target);
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printf("icmp6: neighbor sol: who has %s",
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ip6addr_string(&p->nd_ns_target));
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if (vflag) {
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#define NDSOLLEN 24
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icmp6_opt_print((const u_char *)dp + NDSOLLEN,
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icmp6len - NDSOLLEN);
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}
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}
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break;
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case ND_NEIGHBOR_ADVERT:
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{
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struct nd_neighbor_advert *p;
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p = (struct nd_neighbor_advert *)dp;
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TCHECK(p->nd_na_target);
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printf("icmp6: neighbor adv: tgt is %s",
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ip6addr_string(&p->nd_na_target));
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if (vflag) {
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#define ND_NA_FLAG_ALL \
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(ND_NA_FLAG_ROUTER|ND_NA_FLAG_SOLICITED|ND_NA_FLAG_OVERRIDE)
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/* we don't need ntohl() here. see advanced-api-04. */
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if (p->nd_na_flags_reserved & ND_NA_FLAG_ALL) {
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#undef ND_NA_FLAG_ALL
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u_int32_t flags;
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flags = p->nd_na_flags_reserved;
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printf("(");
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if (flags & ND_NA_FLAG_ROUTER)
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printf("R");
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if (flags & ND_NA_FLAG_SOLICITED)
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printf("S");
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if (flags & ND_NA_FLAG_OVERRIDE)
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printf("O");
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printf(")");
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}
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#define NDADVLEN 24
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icmp6_opt_print((const u_char *)dp + NDADVLEN,
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icmp6len - NDADVLEN);
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}
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}
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break;
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case ND_REDIRECT:
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{
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#define RDR(i) ((struct nd_redirect *)(i))
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char tgtbuf[INET6_ADDRSTRLEN], dstbuf[INET6_ADDRSTRLEN];
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TCHECK(RDR(dp)->nd_rd_dst);
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inet_ntop(AF_INET6, &RDR(dp)->nd_rd_target,
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tgtbuf, INET6_ADDRSTRLEN);
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inet_ntop(AF_INET6, &RDR(dp)->nd_rd_dst,
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dstbuf, INET6_ADDRSTRLEN);
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printf("icmp6: redirect %s to %s", dstbuf, tgtbuf);
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#define REDIRECTLEN 40
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if (vflag) {
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icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
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icmp6len - REDIRECTLEN);
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}
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break;
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}
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case ICMP6_ROUTER_RENUMBERING:
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switch (dp->icmp6_code) {
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case ICMP6_ROUTER_RENUMBERING_COMMAND:
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printf("icmp6: router renum command");
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break;
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case ICMP6_ROUTER_RENUMBERING_RESULT:
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printf("icmp6: router renum result");
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break;
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default:
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printf("icmp6: router renum code-#%d", dp->icmp6_code);
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break;
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}
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break;
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#ifdef ICMP6_WRUREQUEST
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case ICMP6_WRUREQUEST: /*ICMP6_FQDN_QUERY*/
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{
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int siz;
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siz = ep - (u_char *)(dp + 1);
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if (siz == 4)
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printf("icmp6: who-are-you request");
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else {
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printf("icmp6: FQDN request");
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if (vflag) {
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if (siz < 8)
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printf("?(icmp6_data %d bytes)", siz);
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else if (8 < siz)
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printf("?(extra %d bytes)", siz - 8);
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}
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}
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break;
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}
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#endif /*ICMP6_WRUREQUEST*/
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#ifdef ICMP6_WRUREPLY
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case ICMP6_WRUREPLY: /*ICMP6_FQDN_REPLY*/
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{
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enum { UNKNOWN, WRU, FQDN } mode = UNKNOWN;
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u_char const *buf;
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u_char const *cp = NULL;
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buf = (u_char *)(dp + 1);
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/* fair guess */
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if (buf[12] == ep - buf - 13)
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mode = FQDN;
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else if (dp->icmp6_code == 1)
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mode = FQDN;
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/* wild guess */
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if (mode == UNKNOWN) {
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cp = buf + 4;
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while (cp < ep) {
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if (!isprint(*cp++))
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mode = FQDN;
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}
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}
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#ifndef abs
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#define abs(a) ((0 < (a)) ? (a) : -(a))
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#endif
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if (mode == UNKNOWN && 2 < abs(buf[12] - (ep - buf - 13)))
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mode = WRU;
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if (mode == UNKNOWN)
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mode = FQDN;
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if (mode == WRU) {
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cp = buf + 4;
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printf("icmp6: who-are-you reply(\"");
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} else if (mode == FQDN) {
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cp = buf + 13;
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printf("icmp6: FQDN reply(\"");
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}
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for (; cp < ep; cp++)
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printf((isprint(*cp) ? "%c" : "\\%03o"), *cp);
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printf("\"");
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if (vflag) {
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printf(",%s", mode == FQDN ? "FQDN" : "WRU");
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if (mode == FQDN) {
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long ttl;
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ttl = (long)ntohl(*(u_long *)&buf[8]);
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if (dp->icmp6_code == 1)
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printf(",TTL=unknown");
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else if (ttl < 0)
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printf(",TTL=%ld:invalid", ttl);
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else
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printf(",TTL=%ld", ttl);
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if (buf[12] != ep - buf - 13) {
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(void)printf(",invalid namelen:%d/%u",
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buf[12],
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(unsigned int)(ep - buf - 13));
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}
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}
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}
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printf(")");
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break;
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}
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#endif /*ICMP6_WRUREPLY*/
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default:
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printf("icmp6: type-#%d", dp->icmp6_type);
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break;
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}
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return;
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trunc:
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fputs("[|icmp6]", stdout);
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#if 0
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#undef TCHECK
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#endif
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}
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void
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icmp6_opt_print(register const u_char *bp, int resid)
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{
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register const struct nd_opt_hdr *op;
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register const struct nd_opt_hdr *opl; /* why there's no struct? */
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register const struct nd_opt_prefix_info *opp;
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register const struct icmp6_opts_redirect *opr;
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register const struct nd_opt_mtu *opm;
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register const u_char *ep;
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int opts_len;
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#if 0
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register const struct ip6_hdr *ip;
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register const char *str;
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register const struct ip6_hdr *oip;
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register const struct udphdr *ouh;
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register int hlen, dport;
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char buf[256];
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#endif
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#if 0
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#define TCHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) goto trunc
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#endif
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#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
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op = (struct nd_opt_hdr *)bp;
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#if 0
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ip = (struct ip6_hdr *)bp2;
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oip = &dp->icmp6_ip6;
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str = buf;
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#endif
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/* 'ep' points to the end of avaible data. */
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ep = snapend;
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ECHECK(op->nd_opt_len);
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if (resid <= 0)
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return;
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switch(op->nd_opt_type) {
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case ND_OPT_SOURCE_LINKADDR:
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opl = (struct nd_opt_hdr *)op;
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#if 1
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if ((u_char *)opl + (opl->nd_opt_len << 3) > ep)
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goto trunc;
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#else
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TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1);
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#endif
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printf("(src lladdr: %s",
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etheraddr_string((u_char *)(opl + 1)));
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if (opl->nd_opt_len != 1)
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printf("!");
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printf(")");
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icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
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resid - (op->nd_opt_len << 3));
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break;
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case ND_OPT_TARGET_LINKADDR:
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opl = (struct nd_opt_hdr *)op;
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#if 1
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if ((u_char *)opl + (opl->nd_opt_len << 3) > ep)
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goto trunc;
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#else
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TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1);
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#endif
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printf("(tgt lladdr: %s",
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etheraddr_string((u_char *)(opl + 1)));
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if (opl->nd_opt_len != 1)
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|
printf("!");
|
|
printf(")");
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
|
|
resid - (op->nd_opt_len << 3));
|
|
break;
|
|
case ND_OPT_PREFIX_INFORMATION:
|
|
opp = (struct nd_opt_prefix_info *)op;
|
|
TCHECK(opp->nd_opt_pi_prefix);
|
|
printf("(prefix info: ");
|
|
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
|
|
printf("L");
|
|
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO)
|
|
printf("A");
|
|
if (opp->nd_opt_pi_flags_reserved)
|
|
printf(" ");
|
|
printf("valid_ltime=");
|
|
if ((u_int32_t)ntohl(opp->nd_opt_pi_valid_time) == ~0U)
|
|
printf("infinity");
|
|
else {
|
|
printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_valid_time));
|
|
}
|
|
printf(", ");
|
|
printf("preffered_ltime=");
|
|
if ((u_int32_t)ntohl(opp->nd_opt_pi_preferred_time) == ~0U)
|
|
printf("infinity");
|
|
else {
|
|
printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_preferred_time));
|
|
}
|
|
printf(", ");
|
|
printf("prefix=%s/%d", ip6addr_string(&opp->nd_opt_pi_prefix),
|
|
opp->nd_opt_pi_prefix_len);
|
|
if (opp->nd_opt_pi_len != 4)
|
|
printf("!");
|
|
printf(")");
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
|
|
resid - (op->nd_opt_len << 3));
|
|
break;
|
|
case ND_OPT_REDIRECTED_HEADER:
|
|
opr = (struct icmp6_opts_redirect *)op;
|
|
printf("(redirect)");
|
|
/* xxx */
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
|
|
resid - (op->nd_opt_len << 3));
|
|
break;
|
|
case ND_OPT_MTU:
|
|
opm = (struct nd_opt_mtu *)op;
|
|
TCHECK(opm->nd_opt_mtu_mtu);
|
|
printf("(mtu: ");
|
|
printf("mtu=%u", (u_int32_t)ntohl(opm->nd_opt_mtu_mtu));
|
|
if (opm->nd_opt_mtu_len != 1)
|
|
printf("!");
|
|
printf(")");
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3),
|
|
resid - (op->nd_opt_len << 3));
|
|
break;
|
|
default:
|
|
opts_len = op->nd_opt_len;
|
|
printf("(unknwon opt_type=%d, opt_len=%d)",
|
|
op->nd_opt_type, opts_len);
|
|
if (opts_len == 0)
|
|
opts_len = 1; /* XXX */
|
|
icmp6_opt_print((const u_char *)op + (opts_len << 3),
|
|
resid - (opts_len << 3));
|
|
break;
|
|
}
|
|
return;
|
|
trunc:
|
|
fputs("[ndp opt]", stdout);
|
|
return;
|
|
#if 0
|
|
#undef TCHECK
|
|
#endif
|
|
#undef ECHECK
|
|
}
|
|
|
|
void
|
|
mld6_print(register const u_char *bp)
|
|
{
|
|
register struct mld6_hdr *mp = (struct mld6_hdr *)bp;
|
|
register const u_char *ep;
|
|
|
|
/* 'ep' points to the end of avaible data. */
|
|
ep = snapend;
|
|
|
|
if ((u_char *)mp + sizeof(*mp) > ep)
|
|
return;
|
|
|
|
printf("max resp delay: %d ", ntohs(mp->mld6_maxdelay));
|
|
printf("addr: %s", ip6addr_string(&mp->mld6_addr));
|
|
|
|
return;
|
|
}
|
|
#endif /* INET6 */
|