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/* $OpenBSD: print-icmp6.c,v 1.21 2016/07/28 13:05:52 bluhm Exp $ */ |
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/* |
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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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#ifdef INET6 |
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#include <ctype.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/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 <stdlib.h> |
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#include <string.h> |
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#include <netinet/ip6.h> |
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#include <netinet/icmp6.h> |
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#include <netinet6/mld6.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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void icmp6_opt_print(const u_char *, int); |
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void mld6_print(const u_char *); |
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void mldv2_query_print(const u_char *, u_int); |
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void mldv2_report_print(const u_char *, u_int); |
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/* mldv2 report types */ |
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static struct tok mldv2report2str[] = { |
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{ 1, "is_in" }, |
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{ 2, "is_ex" }, |
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{ 3, "to_in" }, |
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{ 4, "to_ex" }, |
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{ 5, "allow" }, |
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{ 6, "block" }, |
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{ 0, NULL } |
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}; |
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#define MLDV2_QUERY_QRV 24 |
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#define MLDV2_QUERY_QQIC 25 |
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#define MLDV2_QUERY_NSRCS 26 |
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#define MLDV2_QUERY_SRC0 28 |
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#define MLDV2_QUERY_QRV_SFLAG (1 << 3) |
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#define MLD_V1_QUERY_MINLEN 24 |
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#define MLDV2_REPORT_GROUP0 8 |
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#define MLDV2_REPORT_MINLEN 8 |
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#define MLDV2_REPORT_MINGRPLEN 20 |
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#define MLDV2_RGROUP_NSRCS 2 |
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#define MLDV2_RGROUP_MADDR 4 |
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#define MLDV2_MRC_FLOAT (1 << 15) |
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#define MLDV2_MRD(mant, exp) ((mant | 0x1000) << (exp + 3)) |
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#define MLDV2_QQIC_FLOAT (1 << 7) |
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#define MLDV2_QQI(mant, exp) ((mant | 0x10) << (exp + 3)) |
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static int |
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icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icmp6, |
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u_int len) |
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{ |
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union { |
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struct { |
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struct in6_addr ph_src; |
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struct in6_addr ph_dst; |
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u_int32_t ph_len; |
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u_int8_t ph_zero[3]; |
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u_int8_t ph_nxt; |
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} ph; |
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u_int16_t pa[20]; |
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} phu; |
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size_t i; |
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u_int32_t sum = 0; |
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/* pseudo-header */ |
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memset(&phu, 0, sizeof(phu)); |
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phu.ph.ph_src = ip6->ip6_src; |
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phu.ph.ph_dst = ip6->ip6_dst; |
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phu.ph.ph_len = htonl(len); |
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phu.ph.ph_nxt = IPPROTO_ICMPV6; |
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for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++) |
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sum += phu.pa[i]; |
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return in_cksum((u_short *)icmp6, len, sum); |
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} |
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void |
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icmp6_print(const u_char *bp, u_int length, const u_char *bp2) |
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{ |
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const struct icmp6_hdr *dp; |
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const struct ip6_hdr *ip; |
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const char *str; |
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const struct ip6_hdr *oip; |
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const struct udphdr *ouh; |
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int hlen, dport; |
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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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TCHECK(ouh->uh_dport); |
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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", (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", |
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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", |
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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", |
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(u_int32_t)ntohl(dp->icmp6_pptr)); |
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break; |
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default: |
254 |
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printf("icmp6: parameter problem code-#%d", |
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dp->icmp6_code); |
256 |
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break; |
257 |
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} |
258 |
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break; |
259 |
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case ICMP6_ECHO_REQUEST: |
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case ICMP6_ECHO_REPLY: |
261 |
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printf("icmp6: echo %s", dp->icmp6_type == ICMP6_ECHO_REQUEST ? |
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"request" : "reply"); |
263 |
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if (vflag) { |
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TCHECK(dp->icmp6_seq); |
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printf(" (id:%04x seq:%u)", |
266 |
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ntohs(dp->icmp6_id), ntohs(dp->icmp6_seq)); |
267 |
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} |
268 |
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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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if (length == MLD_V1_QUERY_MINLEN) { |
272 |
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mld6_print((const u_char *)dp); |
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} else if (length >= MLD_V2_QUERY_MINLEN) { |
274 |
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printf("v2 "); |
275 |
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mldv2_query_print((const u_char *)dp, length); |
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} else { |
277 |
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printf("unknown-version (len %u) ", length); |
278 |
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} |
279 |
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break; |
280 |
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case ICMP6_MEMBERSHIP_REPORT: |
281 |
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printf("icmp6: multicast listener report "); |
282 |
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mld6_print((const u_char *)dp); |
283 |
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break; |
284 |
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case ICMP6_MEMBERSHIP_REDUCTION: |
285 |
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printf("icmp6: multicast listener done "); |
286 |
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mld6_print((const u_char *)dp); |
287 |
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break; |
288 |
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case ND_ROUTER_SOLICIT: |
289 |
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printf("icmp6: router solicitation "); |
290 |
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if (vflag) { |
291 |
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#define RTSOLLEN 8 |
292 |
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icmp6_opt_print((const u_char *)dp + RTSOLLEN, |
293 |
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icmp6len - RTSOLLEN); |
294 |
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} |
295 |
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break; |
296 |
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case ND_ROUTER_ADVERT: |
297 |
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printf("icmp6: router advertisement"); |
298 |
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if (vflag) { |
299 |
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struct nd_router_advert *p; |
300 |
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301 |
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p = (struct nd_router_advert *)dp; |
302 |
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TCHECK(p->nd_ra_retransmit); |
303 |
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printf("(chlim=%d, ", (int)p->nd_ra_curhoplimit); |
304 |
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if (p->nd_ra_flags_reserved & ND_RA_FLAG_MANAGED) |
305 |
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printf("M"); |
306 |
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if (p->nd_ra_flags_reserved & ND_RA_FLAG_OTHER) |
307 |
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printf("O"); |
308 |
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if (p->nd_ra_flags_reserved & |
309 |
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(ND_RA_FLAG_MANAGED|ND_RA_FLAG_OTHER)) |
310 |
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printf(", "); |
311 |
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switch (p->nd_ra_flags_reserved |
312 |
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& ND_RA_FLAG_RTPREF_MASK) { |
313 |
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case ND_RA_FLAG_RTPREF_HIGH: |
314 |
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printf("pref=high, "); |
315 |
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break; |
316 |
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case ND_RA_FLAG_RTPREF_MEDIUM: |
317 |
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printf("pref=medium, "); |
318 |
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break; |
319 |
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case ND_RA_FLAG_RTPREF_LOW: |
320 |
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printf("pref=low, "); |
321 |
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break; |
322 |
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case ND_RA_FLAG_RTPREF_RSV: |
323 |
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printf("pref=rsv, "); |
324 |
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break; |
325 |
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} |
326 |
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printf("router_ltime=%d, ", ntohs(p->nd_ra_router_lifetime)); |
327 |
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printf("reachable_time=%u, ", |
328 |
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(u_int32_t)ntohl(p->nd_ra_reachable)); |
329 |
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printf("retrans_time=%u)", |
330 |
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(u_int32_t)ntohl(p->nd_ra_retransmit)); |
331 |
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#define RTADVLEN 16 |
332 |
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icmp6_opt_print((const u_char *)dp + RTADVLEN, |
333 |
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icmp6len - RTADVLEN); |
334 |
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} |
335 |
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break; |
336 |
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case ND_NEIGHBOR_SOLICIT: |
337 |
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{ |
338 |
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struct nd_neighbor_solicit *p; |
339 |
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p = (struct nd_neighbor_solicit *)dp; |
340 |
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TCHECK(p->nd_ns_target); |
341 |
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printf("icmp6: neighbor sol: who has %s", |
342 |
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ip6addr_string(&p->nd_ns_target)); |
343 |
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if (vflag) { |
344 |
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#define NDSOLLEN 24 |
345 |
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icmp6_opt_print((const u_char *)dp + NDSOLLEN, |
346 |
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icmp6len - NDSOLLEN); |
347 |
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} |
348 |
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} |
349 |
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break; |
350 |
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case ND_NEIGHBOR_ADVERT: |
351 |
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{ |
352 |
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struct nd_neighbor_advert *p; |
353 |
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|
354 |
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p = (struct nd_neighbor_advert *)dp; |
355 |
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TCHECK(p->nd_na_target); |
356 |
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printf("icmp6: neighbor adv: tgt is %s", |
357 |
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ip6addr_string(&p->nd_na_target)); |
358 |
|
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if (vflag) { |
359 |
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#define ND_NA_FLAG_ALL \ |
360 |
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(ND_NA_FLAG_ROUTER|ND_NA_FLAG_SOLICITED|ND_NA_FLAG_OVERRIDE) |
361 |
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/* we don't need ntohl() here. see advanced-api-04. */ |
362 |
|
|
if (p->nd_na_flags_reserved & ND_NA_FLAG_ALL) { |
363 |
|
|
#undef ND_NA_FLAG_ALL |
364 |
|
|
u_int32_t flags; |
365 |
|
|
|
366 |
|
|
flags = p->nd_na_flags_reserved; |
367 |
|
|
printf("("); |
368 |
|
|
if (flags & ND_NA_FLAG_ROUTER) |
369 |
|
|
printf("R"); |
370 |
|
|
if (flags & ND_NA_FLAG_SOLICITED) |
371 |
|
|
printf("S"); |
372 |
|
|
if (flags & ND_NA_FLAG_OVERRIDE) |
373 |
|
|
printf("O"); |
374 |
|
|
printf(")"); |
375 |
|
|
} |
376 |
|
|
#define NDADVLEN 24 |
377 |
|
|
icmp6_opt_print((const u_char *)dp + NDADVLEN, |
378 |
|
|
icmp6len - NDADVLEN); |
379 |
|
|
} |
380 |
|
|
} |
381 |
|
|
break; |
382 |
|
|
case ND_REDIRECT: |
383 |
|
|
{ |
384 |
|
|
#define RDR(i) ((struct nd_redirect *)(i)) |
385 |
|
|
char tgtbuf[INET6_ADDRSTRLEN], dstbuf[INET6_ADDRSTRLEN]; |
386 |
|
|
|
387 |
|
|
TCHECK(RDR(dp)->nd_rd_dst); |
388 |
|
|
inet_ntop(AF_INET6, &RDR(dp)->nd_rd_target, |
389 |
|
|
tgtbuf, INET6_ADDRSTRLEN); |
390 |
|
|
inet_ntop(AF_INET6, &RDR(dp)->nd_rd_dst, |
391 |
|
|
dstbuf, INET6_ADDRSTRLEN); |
392 |
|
|
printf("icmp6: redirect %s to %s", dstbuf, tgtbuf); |
393 |
|
|
#define REDIRECTLEN 40 |
394 |
|
|
if (vflag) { |
395 |
|
|
icmp6_opt_print((const u_char *)dp + REDIRECTLEN, |
396 |
|
|
icmp6len - REDIRECTLEN); |
397 |
|
|
} |
398 |
|
|
break; |
399 |
|
|
} |
400 |
|
|
case ICMP6_ROUTER_RENUMBERING: |
401 |
|
|
switch (dp->icmp6_code) { |
402 |
|
|
case ICMP6_ROUTER_RENUMBERING_COMMAND: |
403 |
|
|
printf("icmp6: router renum command"); |
404 |
|
|
break; |
405 |
|
|
case ICMP6_ROUTER_RENUMBERING_RESULT: |
406 |
|
|
printf("icmp6: router renum result"); |
407 |
|
|
break; |
408 |
|
|
default: |
409 |
|
|
printf("icmp6: router renum code-#%d", dp->icmp6_code); |
410 |
|
|
break; |
411 |
|
|
} |
412 |
|
|
break; |
413 |
|
|
#ifdef ICMP6_WRUREQUEST |
414 |
|
|
case ICMP6_WRUREQUEST: /*ICMP6_FQDN_QUERY*/ |
415 |
|
|
{ |
416 |
|
|
int siz; |
417 |
|
|
siz = ep - (u_char *)(dp + 1); |
418 |
|
|
if (siz == 4) |
419 |
|
|
printf("icmp6: who-are-you request"); |
420 |
|
|
else { |
421 |
|
|
printf("icmp6: FQDN request"); |
422 |
|
|
if (vflag) { |
423 |
|
|
if (siz < 8) |
424 |
|
|
printf("?(icmp6_data %d bytes)", siz); |
425 |
|
|
else if (8 < siz) |
426 |
|
|
printf("?(extra %d bytes)", siz - 8); |
427 |
|
|
} |
428 |
|
|
} |
429 |
|
|
break; |
430 |
|
|
} |
431 |
|
|
#endif /*ICMP6_WRUREQUEST*/ |
432 |
|
|
#ifdef ICMP6_WRUREPLY |
433 |
|
|
case ICMP6_WRUREPLY: /*ICMP6_FQDN_REPLY*/ |
434 |
|
|
{ |
435 |
|
|
enum { UNKNOWN, WRU, FQDN } mode = UNKNOWN; |
436 |
|
|
u_char const *buf; |
437 |
|
|
u_char const *cp = NULL; |
438 |
|
|
|
439 |
|
|
buf = (u_char *)(dp + 1); |
440 |
|
|
|
441 |
|
|
/* fair guess */ |
442 |
|
|
if (buf[12] == ep - buf - 13) |
443 |
|
|
mode = FQDN; |
444 |
|
|
else if (dp->icmp6_code == 1) |
445 |
|
|
mode = FQDN; |
446 |
|
|
|
447 |
|
|
/* wild guess */ |
448 |
|
|
if (mode == UNKNOWN) { |
449 |
|
|
cp = buf + 4; |
450 |
|
|
while (cp < ep) { |
451 |
|
|
if (!isprint(*cp++)) |
452 |
|
|
mode = FQDN; |
453 |
|
|
} |
454 |
|
|
} |
455 |
|
|
if (mode == UNKNOWN && 2 < labs(buf[12] - (ep - buf - 13))) |
456 |
|
|
mode = WRU; |
457 |
|
|
if (mode == UNKNOWN) |
458 |
|
|
mode = FQDN; |
459 |
|
|
|
460 |
|
|
if (mode == WRU) { |
461 |
|
|
cp = buf + 4; |
462 |
|
|
printf("icmp6: who-are-you reply(\""); |
463 |
|
|
} else if (mode == FQDN) { |
464 |
|
|
cp = buf + 13; |
465 |
|
|
printf("icmp6: FQDN reply(\""); |
466 |
|
|
} |
467 |
|
|
for (; cp < ep; cp++) |
468 |
|
|
printf((isprint(*cp) ? "%c" : "\\%03o"), *cp); |
469 |
|
|
printf("\""); |
470 |
|
|
if (vflag) { |
471 |
|
|
printf(",%s", mode == FQDN ? "FQDN" : "WRU"); |
472 |
|
|
if (mode == FQDN) { |
473 |
|
|
int ttl; |
474 |
|
|
ttl = (int)ntohl(*(u_int32_t *)&buf[8]); |
475 |
|
|
if (dp->icmp6_code == 1) |
476 |
|
|
printf(",TTL=unknown"); |
477 |
|
|
else if (ttl < 0) |
478 |
|
|
printf(",TTL=%d:invalid", ttl); |
479 |
|
|
else |
480 |
|
|
printf(",TTL=%d", ttl); |
481 |
|
|
if (buf[12] != ep - buf - 13) { |
482 |
|
|
(void)printf(",invalid namelen:%d/%u", |
483 |
|
|
buf[12], |
484 |
|
|
(unsigned int)(ep - buf - 13)); |
485 |
|
|
} |
486 |
|
|
} |
487 |
|
|
} |
488 |
|
|
printf(")"); |
489 |
|
|
break; |
490 |
|
|
} |
491 |
|
|
#endif /*ICMP6_WRUREPLY*/ |
492 |
|
|
case MLDV2_LISTENER_REPORT: |
493 |
|
|
printf("multicast listener report v2"); |
494 |
|
|
mldv2_report_print((const u_char *) dp, length); |
495 |
|
|
break; |
496 |
|
|
default: |
497 |
|
|
printf("icmp6: type-#%d", dp->icmp6_type); |
498 |
|
|
break; |
499 |
|
|
} |
500 |
|
|
if (vflag) { |
501 |
|
|
if (TTEST2(dp->icmp6_type, length)) { |
502 |
|
|
u_int16_t sum, icmp6_sum; |
503 |
|
|
sum = icmp6_cksum(ip, dp, length); |
504 |
|
|
if (sum != 0) { |
505 |
|
|
icmp6_sum = EXTRACT_16BITS(&dp->icmp6_cksum); |
506 |
|
|
printf(" [bad icmp6 cksum %x! -> %x]", icmp6_sum, |
507 |
|
|
in_cksum_shouldbe(icmp6_sum, sum)); |
508 |
|
|
} else |
509 |
|
|
printf(" [icmp6 cksum ok]"); |
510 |
|
|
} |
511 |
|
|
} |
512 |
|
|
return; |
513 |
|
|
trunc: |
514 |
|
|
fputs("[|icmp6]", stdout); |
515 |
|
|
#if 0 |
516 |
|
|
#undef TCHECK |
517 |
|
|
#endif |
518 |
|
|
} |
519 |
|
|
|
520 |
|
|
void |
521 |
|
|
icmp6_opt_print(const u_char *bp, int resid) |
522 |
|
|
{ |
523 |
|
|
const struct nd_opt_hdr *op; |
524 |
|
|
const struct nd_opt_hdr *opl; /* why there's no struct? */ |
525 |
|
|
const struct nd_opt_prefix_info *opp; |
526 |
|
|
const struct icmp6_opts_redirect *opr; |
527 |
|
|
const struct nd_opt_mtu *opm; |
528 |
|
|
const struct nd_opt_rdnss *oprd; |
529 |
|
|
const struct nd_opt_route_info *opri; |
530 |
|
|
const u_char *ep; |
531 |
|
|
const struct in6_addr *in6p; |
532 |
|
|
struct in6_addr in6; |
533 |
|
|
int i, opts_len; |
534 |
|
|
#if 0 |
535 |
|
|
const struct ip6_hdr *ip; |
536 |
|
|
const char *str; |
537 |
|
|
const struct ip6_hdr *oip; |
538 |
|
|
const struct udphdr *ouh; |
539 |
|
|
int hlen, dport; |
540 |
|
|
char buf[256]; |
541 |
|
|
#endif |
542 |
|
|
|
543 |
|
|
#if 0 |
544 |
|
|
#define TCHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) goto trunc |
545 |
|
|
#endif |
546 |
|
|
#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return |
547 |
|
|
|
548 |
|
|
op = (struct nd_opt_hdr *)bp; |
549 |
|
|
#if 0 |
550 |
|
|
ip = (struct ip6_hdr *)bp2; |
551 |
|
|
oip = &dp->icmp6_ip6; |
552 |
|
|
str = buf; |
553 |
|
|
#endif |
554 |
|
|
/* 'ep' points to the end of avaible data. */ |
555 |
|
|
ep = snapend; |
556 |
|
|
|
557 |
|
|
ECHECK(op->nd_opt_len); |
558 |
|
|
if (resid <= 0) |
559 |
|
|
return; |
560 |
|
|
if (op->nd_opt_len == 0) |
561 |
|
|
goto trunc; |
562 |
|
|
if (bp + (op->nd_opt_len << 3) > ep) |
563 |
|
|
goto trunc; |
564 |
|
|
switch (op->nd_opt_type) { |
565 |
|
|
case ND_OPT_SOURCE_LINKADDR: |
566 |
|
|
opl = (struct nd_opt_hdr *)op; |
567 |
|
|
#if 1 |
568 |
|
|
if ((u_char *)opl + (opl->nd_opt_len << 3) > ep) |
569 |
|
|
goto trunc; |
570 |
|
|
#else |
571 |
|
|
TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1); |
572 |
|
|
#endif |
573 |
|
|
printf("(src lladdr: %s", |
574 |
|
|
etheraddr_string((u_char *)(opl + 1))); |
575 |
|
|
if (opl->nd_opt_len != 1) |
576 |
|
|
printf("!"); |
577 |
|
|
printf(")"); |
578 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
579 |
|
|
resid - (op->nd_opt_len << 3)); |
580 |
|
|
break; |
581 |
|
|
case ND_OPT_TARGET_LINKADDR: |
582 |
|
|
opl = (struct nd_opt_hdr *)op; |
583 |
|
|
#if 1 |
584 |
|
|
if ((u_char *)opl + (opl->nd_opt_len << 3) > ep) |
585 |
|
|
goto trunc; |
586 |
|
|
#else |
587 |
|
|
TCHECK((u_char *)opl + (opl->nd_opt_len << 3) - 1); |
588 |
|
|
#endif |
589 |
|
|
printf("(tgt lladdr: %s", |
590 |
|
|
etheraddr_string((u_char *)(opl + 1))); |
591 |
|
|
if (opl->nd_opt_len != 1) |
592 |
|
|
printf("!"); |
593 |
|
|
printf(")"); |
594 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
595 |
|
|
resid - (op->nd_opt_len << 3)); |
596 |
|
|
break; |
597 |
|
|
case ND_OPT_PREFIX_INFORMATION: |
598 |
|
|
opp = (struct nd_opt_prefix_info *)op; |
599 |
|
|
TCHECK(opp->nd_opt_pi_prefix); |
600 |
|
|
printf("(prefix info: "); |
601 |
|
|
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK) |
602 |
|
|
printf("L"); |
603 |
|
|
if (opp->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO) |
604 |
|
|
printf("A"); |
605 |
|
|
if (opp->nd_opt_pi_flags_reserved) |
606 |
|
|
printf(" "); |
607 |
|
|
printf("valid_ltime="); |
608 |
|
|
if ((u_int32_t)ntohl(opp->nd_opt_pi_valid_time) == ~0U) |
609 |
|
|
printf("infinity"); |
610 |
|
|
else { |
611 |
|
|
printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_valid_time)); |
612 |
|
|
} |
613 |
|
|
printf(", "); |
614 |
|
|
printf("preferred_ltime="); |
615 |
|
|
if ((u_int32_t)ntohl(opp->nd_opt_pi_preferred_time) == ~0U) |
616 |
|
|
printf("infinity"); |
617 |
|
|
else { |
618 |
|
|
printf("%u", (u_int32_t)ntohl(opp->nd_opt_pi_preferred_time)); |
619 |
|
|
} |
620 |
|
|
printf(", "); |
621 |
|
|
printf("prefix=%s/%d", ip6addr_string(&opp->nd_opt_pi_prefix), |
622 |
|
|
opp->nd_opt_pi_prefix_len); |
623 |
|
|
if (opp->nd_opt_pi_len != 4) |
624 |
|
|
printf("!"); |
625 |
|
|
printf(")"); |
626 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
627 |
|
|
resid - (op->nd_opt_len << 3)); |
628 |
|
|
break; |
629 |
|
|
case ND_OPT_REDIRECTED_HEADER: |
630 |
|
|
opr = (struct icmp6_opts_redirect *)op; |
631 |
|
|
printf("(redirect)"); |
632 |
|
|
/* xxx */ |
633 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
634 |
|
|
resid - (op->nd_opt_len << 3)); |
635 |
|
|
break; |
636 |
|
|
case ND_OPT_MTU: |
637 |
|
|
opm = (struct nd_opt_mtu *)op; |
638 |
|
|
TCHECK(opm->nd_opt_mtu_mtu); |
639 |
|
|
printf("(mtu: "); |
640 |
|
|
printf("mtu=%u", (u_int32_t)ntohl(opm->nd_opt_mtu_mtu)); |
641 |
|
|
if (opm->nd_opt_mtu_len != 1) |
642 |
|
|
printf("!"); |
643 |
|
|
printf(")"); |
644 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
645 |
|
|
resid - (op->nd_opt_len << 3)); |
646 |
|
|
break; |
647 |
|
|
case ND_OPT_ROUTE_INFO: |
648 |
|
|
opri = (struct nd_opt_route_info *)op; |
649 |
|
|
TCHECK(opri->nd_opt_rti_lifetime); |
650 |
|
|
printf("(route-info: "); |
651 |
|
|
memset(&in6, 0, sizeof(in6)); |
652 |
|
|
in6p = (const struct in6_addr *)(opri + 1); |
653 |
|
|
switch (op->nd_opt_len) { |
654 |
|
|
case 1: |
655 |
|
|
break; |
656 |
|
|
case 2: |
657 |
|
|
TCHECK2(*in6p, 8); |
658 |
|
|
memcpy(&in6, opri + 1, 8); |
659 |
|
|
break; |
660 |
|
|
case 3: |
661 |
|
|
TCHECK(*in6p); |
662 |
|
|
memcpy(&in6, opri + 1, sizeof(in6)); |
663 |
|
|
break; |
664 |
|
|
default: |
665 |
|
|
goto trunc; |
666 |
|
|
} |
667 |
|
|
printf("%s/%u, ", ip6addr_string(&in6), |
668 |
|
|
opri->nd_opt_rti_prefixlen); |
669 |
|
|
switch (opri->nd_opt_rti_flags & ND_RA_FLAG_RTPREF_MASK) { |
670 |
|
|
case ND_RA_FLAG_RTPREF_HIGH: |
671 |
|
|
printf("pref=high, "); |
672 |
|
|
break; |
673 |
|
|
case ND_RA_FLAG_RTPREF_MEDIUM: |
674 |
|
|
printf("pref=medium, "); |
675 |
|
|
break; |
676 |
|
|
case ND_RA_FLAG_RTPREF_LOW: |
677 |
|
|
printf("pref=low, "); |
678 |
|
|
break; |
679 |
|
|
case ND_RA_FLAG_RTPREF_RSV: |
680 |
|
|
printf("pref=rsv, "); |
681 |
|
|
break; |
682 |
|
|
} |
683 |
|
|
printf("lifetime=%us)", |
684 |
|
|
(u_int32_t)ntohl(opri->nd_opt_rti_lifetime)); |
685 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
686 |
|
|
resid - (op->nd_opt_len << 3)); |
687 |
|
|
break; |
688 |
|
|
case ND_OPT_RDNSS: |
689 |
|
|
oprd = (const struct nd_opt_rdnss *)op; |
690 |
|
|
printf("(rdnss: "); |
691 |
|
|
TCHECK(oprd->nd_opt_rdnss_lifetime); |
692 |
|
|
printf("lifetime=%us", |
693 |
|
|
(u_int32_t)ntohl(oprd->nd_opt_rdnss_lifetime)); |
694 |
|
|
if (oprd->nd_opt_rdnss_len < 3) { |
695 |
|
|
printf("!"); |
696 |
|
|
} else for (i = 0; i < ((oprd->nd_opt_rdnss_len - 1) / 2); i++) { |
697 |
|
|
struct in6_addr *addr = (struct in6_addr *)(oprd + 1) + i; |
698 |
|
|
TCHECK2(*addr, sizeof(struct in6_addr)); |
699 |
|
|
printf(", addr=%s", ip6addr_string(addr)); |
700 |
|
|
} |
701 |
|
|
printf(")"); |
702 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
703 |
|
|
resid - (op->nd_opt_len << 3)); |
704 |
|
|
break; |
705 |
|
|
case ND_OPT_DNSSL: |
706 |
|
|
printf("(dnssl: opt_len=%d)", op->nd_opt_len); |
707 |
|
|
/* XXX */ |
708 |
|
|
icmp6_opt_print((const u_char *)op + (op->nd_opt_len << 3), |
709 |
|
|
resid - (op->nd_opt_len << 3)); |
710 |
|
|
break; |
711 |
|
|
default: |
712 |
|
|
opts_len = op->nd_opt_len; |
713 |
|
|
printf("(unknown opt_type=%d, opt_len=%d)", |
714 |
|
|
op->nd_opt_type, opts_len); |
715 |
|
|
if (opts_len == 0) |
716 |
|
|
opts_len = 1; /* XXX */ |
717 |
|
|
icmp6_opt_print((const u_char *)op + (opts_len << 3), |
718 |
|
|
resid - (opts_len << 3)); |
719 |
|
|
break; |
720 |
|
|
} |
721 |
|
|
return; |
722 |
|
|
trunc: |
723 |
|
|
fputs("[ndp opt]", stdout); |
724 |
|
|
return; |
725 |
|
|
#if 0 |
726 |
|
|
#undef TCHECK |
727 |
|
|
#endif |
728 |
|
|
#undef ECHECK |
729 |
|
|
} |
730 |
|
|
|
731 |
|
|
void |
732 |
|
|
mld6_print(const u_char *bp) |
733 |
|
|
{ |
734 |
|
|
struct mld_hdr *mp = (struct mld_hdr *)bp; |
735 |
|
|
const u_char *ep; |
736 |
|
|
|
737 |
|
|
/* 'ep' points to the end of avaible data. */ |
738 |
|
|
ep = snapend; |
739 |
|
|
|
740 |
|
|
if ((u_char *)mp + sizeof(*mp) > ep) |
741 |
|
|
return; |
742 |
|
|
|
743 |
|
|
printf("max resp delay: %d ", ntohs(mp->mld_maxdelay)); |
744 |
|
|
printf("addr: %s", ip6addr_string(&mp->mld_addr)); |
745 |
|
|
|
746 |
|
|
return; |
747 |
|
|
} |
748 |
|
|
|
749 |
|
|
void |
750 |
|
|
mldv2_report_print(const u_char *bp, u_int len) |
751 |
|
|
{ |
752 |
|
|
struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; |
753 |
|
|
u_int group, nsrcs, ngroups; |
754 |
|
|
u_int i, j; |
755 |
|
|
|
756 |
|
|
if (len < MLDV2_REPORT_MINLEN) { |
757 |
|
|
printf(" [invalid len %d]", len); |
758 |
|
|
return; |
759 |
|
|
} |
760 |
|
|
|
761 |
|
|
TCHECK(icp->icmp6_data16[1]); |
762 |
|
|
ngroups = ntohs(icp->icmp6_data16[1]); |
763 |
|
|
printf(", %d group record(s)", ngroups); |
764 |
|
|
if (vflag > 0) { |
765 |
|
|
/* Print the group records */ |
766 |
|
|
group = MLDV2_REPORT_GROUP0; |
767 |
|
|
for (i = 0; i < ngroups; i++) { |
768 |
|
|
/* type(1) + auxlen(1) + numsrc(2) + grp(16) */ |
769 |
|
|
if (len < group + MLDV2_REPORT_MINGRPLEN) { |
770 |
|
|
printf(" [invalid number of groups]"); |
771 |
|
|
return; |
772 |
|
|
} |
773 |
|
|
TCHECK2(bp[group + MLDV2_RGROUP_MADDR], |
774 |
|
|
sizeof(struct in6_addr)); |
775 |
|
|
printf(" [gaddr %s", |
776 |
|
|
ip6addr_string(&bp[group + MLDV2_RGROUP_MADDR])); |
777 |
|
|
printf(" %s", tok2str(mldv2report2str, |
778 |
|
|
" [v2-report-#%d]", bp[group])); |
779 |
|
|
nsrcs = (bp[group + MLDV2_RGROUP_NSRCS] << 8) + |
780 |
|
|
bp[group + MLDV2_RGROUP_NSRCS + 1]; |
781 |
|
|
/* Check the number of sources and print them */ |
782 |
|
|
if (len < group + MLDV2_REPORT_MINGRPLEN + |
783 |
|
|
(nsrcs * sizeof(struct in6_addr))) { |
784 |
|
|
printf(" [invalid number of sources %d]", nsrcs); |
785 |
|
|
return; |
786 |
|
|
} |
787 |
|
|
if (vflag == 1) |
788 |
|
|
printf(", %d source(s)", nsrcs); |
789 |
|
|
else { |
790 |
|
|
/* Print the sources */ |
791 |
|
|
(void)printf(" {"); |
792 |
|
|
for (j = 0; j < nsrcs; j++) { |
793 |
|
|
TCHECK2(bp[group + |
794 |
|
|
MLDV2_REPORT_MINGRPLEN + |
795 |
|
|
j * sizeof(struct in6_addr)], |
796 |
|
|
sizeof(struct in6_addr)); |
797 |
|
|
printf(" %s", ip6addr_string(&bp[group + |
798 |
|
|
MLDV2_REPORT_MINGRPLEN + j * |
799 |
|
|
sizeof(struct in6_addr)])); |
800 |
|
|
} |
801 |
|
|
(void)printf(" }"); |
802 |
|
|
} |
803 |
|
|
/* Next group record */ |
804 |
|
|
group += MLDV2_REPORT_MINGRPLEN + nsrcs * |
805 |
|
|
sizeof(struct in6_addr); |
806 |
|
|
printf("]"); |
807 |
|
|
} |
808 |
|
|
} |
809 |
|
|
return; |
810 |
|
|
trunc: |
811 |
|
|
(void)printf("[|icmp6]"); |
812 |
|
|
return; |
813 |
|
|
} |
814 |
|
|
|
815 |
|
|
void |
816 |
|
|
mldv2_query_print(const u_char *bp, u_int len) |
817 |
|
|
{ |
818 |
|
|
struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; |
819 |
|
|
u_int mrc, qqic; |
820 |
|
|
int mrd, qqi; |
821 |
|
|
int mant, exp; |
822 |
|
|
u_int nsrcs; |
823 |
|
|
u_int i; |
824 |
|
|
|
825 |
|
|
if (len < MLD_V2_QUERY_MINLEN) { |
826 |
|
|
printf(" [invalid len %d]", len); |
827 |
|
|
return; |
828 |
|
|
} |
829 |
|
|
TCHECK(icp->icmp6_data16[0]); |
830 |
|
|
mrc = ntohs(icp->icmp6_data16[0]); |
831 |
|
|
if (mrc & MLDV2_MRC_FLOAT) { |
832 |
|
|
mant = MLD_MRC_MANT(mrc); |
833 |
|
|
exp = MLD_MRC_EXP(mrc); |
834 |
|
|
mrd = MLDV2_MRD(mant, exp); |
835 |
|
|
} else { |
836 |
|
|
mrd = mrc; |
837 |
|
|
} |
838 |
|
|
if (vflag) { |
839 |
|
|
(void)printf(" [max resp delay=%d]", mrd); |
840 |
|
|
} |
841 |
|
|
TCHECK2(bp[8], sizeof(struct in6_addr)); |
842 |
|
|
printf(" [gaddr %s", ip6addr_string(&bp[8])); |
843 |
|
|
|
844 |
|
|
if (vflag) { |
845 |
|
|
TCHECK(bp[MLDV2_QUERY_QQIC]); |
846 |
|
|
if (bp[MLDV2_QUERY_QRV] & MLDV2_QUERY_QRV_SFLAG) { |
847 |
|
|
printf(" sflag"); |
848 |
|
|
} |
849 |
|
|
if (MLD_QRV(bp[MLDV2_QUERY_QRV])) { |
850 |
|
|
printf(" robustness=%d", MLD_QRV(bp[MLDV2_QUERY_QRV])); |
851 |
|
|
} |
852 |
|
|
qqic = bp[MLDV2_QUERY_QQIC]; |
853 |
|
|
if (qqic & MLDV2_QQIC_FLOAT) { |
854 |
|
|
mant = MLD_QQIC_MANT(qqic); |
855 |
|
|
exp = MLD_QQIC_EXP(qqic); |
856 |
|
|
qqi = MLDV2_QQI(mant, exp); |
857 |
|
|
} else { |
858 |
|
|
qqi = bp[MLDV2_QUERY_QQIC]; |
859 |
|
|
} |
860 |
|
|
printf(" qqi=%d", qqi); |
861 |
|
|
} |
862 |
|
|
|
863 |
|
|
TCHECK2(bp[MLDV2_QUERY_NSRCS], 2); |
864 |
|
|
nsrcs = ntohs(*(u_short *)&bp[MLDV2_QUERY_NSRCS]); |
865 |
|
|
if (nsrcs > 0) { |
866 |
|
|
if (len < MLD_V2_QUERY_MINLEN + nsrcs * sizeof(struct in6_addr)) |
867 |
|
|
printf(" [invalid number of sources]"); |
868 |
|
|
else if (vflag > 1) { |
869 |
|
|
printf(" {"); |
870 |
|
|
for (i = 0; i < nsrcs; i++) { |
871 |
|
|
TCHECK2(bp[MLDV2_QUERY_SRC0 + i * |
872 |
|
|
sizeof(struct in6_addr)], |
873 |
|
|
sizeof(struct in6_addr)); |
874 |
|
|
printf(" %s", |
875 |
|
|
ip6addr_string(&bp[MLDV2_QUERY_SRC0 + i * |
876 |
|
|
sizeof(struct in6_addr)])); |
877 |
|
|
} |
878 |
|
|
printf(" }"); |
879 |
|
|
} else |
880 |
|
|
printf(", %d source(s)", nsrcs); |
881 |
|
|
} |
882 |
|
|
printf("]"); |
883 |
|
|
return; |
884 |
|
|
trunc: |
885 |
|
|
(void)printf("[|icmp6]"); |
886 |
|
|
return; |
887 |
|
|
} |
888 |
|
|
|
889 |
|
|
|
890 |
|
|
#endif /* INET6 */ |