diff options
Diffstat (limited to 'contrib/tcpdump/print-icmp6.c')
| -rw-r--r-- | contrib/tcpdump/print-icmp6.c | 1287 |
1 files changed, 1287 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-icmp6.c b/contrib/tcpdump/print-icmp6.c new file mode 100644 index 0000000..41d56b6 --- /dev/null +++ b/contrib/tcpdump/print-icmp6.c @@ -0,0 +1,1287 @@ +/* + * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.85.2.1 2008-02-05 19:36:58 guy Exp $"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef INET6 + +#include <tcpdump-stdinc.h> + +#include <stdio.h> +#include <string.h> + +#include "interface.h" +#include "addrtoname.h" +#include "extract.h" + +#include "ip6.h" +#include "icmp6.h" +#include "ipproto.h" + +#include "udp.h" +#include "ah.h" + +static const char *get_rtpref(u_int); +static const char *get_lifetime(u_int32_t); +static void print_lladdr(const u_char *, size_t); +static void icmp6_opt_print(const u_char *, int); +static void mld6_print(const u_char *); +static void mldv2_report_print(const u_char *, u_int); +static void mldv2_query_print(const u_char *, u_int); +static struct udphdr *get_upperlayer(u_char *, u_int *); +static void dnsname_print(const u_char *, const u_char *); +static void icmp6_nodeinfo_print(u_int, const u_char *, const u_char *); +static void icmp6_rrenum_print(const u_char *, const u_char *); + +#ifndef abs +#define abs(a) ((0 < (a)) ? (a) : -(a)) +#endif + +static struct tok icmp6_type_values[] = { + { ICMP6_DST_UNREACH, "destination unreachable"}, + { ICMP6_PACKET_TOO_BIG, "packet too big"}, + { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"}, + { ICMP6_PARAM_PROB, "parameter problem"}, + { ICMP6_ECHO_REQUEST, "echo request"}, + { ICMP6_ECHO_REPLY, "echo reply"}, + { MLD6_LISTENER_QUERY, "multicast listener query"}, + { MLD6_LISTENER_REPORT, "multicast listener report"}, + { MLD6_LISTENER_DONE, "multicast listener done"}, + { ND_ROUTER_SOLICIT, "router solicitation"}, + { ND_ROUTER_ADVERT, "router advertisement"}, + { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"}, + { ND_NEIGHBOR_ADVERT, "neighbor advertisement"}, + { ND_REDIRECT, "redirect"}, + { ICMP6_ROUTER_RENUMBERING, "router renumbering"}, + { IND_SOLICIT, "inverse neighbor solicitation"}, + { IND_ADVERT, "inverse neighbor advertisement"}, + { MLDV2_LISTENER_REPORT, "multicast listener report v2"}, + { ICMP6_HADISCOV_REQUEST, "ha discovery request"}, + { ICMP6_HADISCOV_REPLY, "ha discovery reply"}, + { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"}, + { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"}, + { ICMP6_WRUREQUEST, "who-are-you request"}, + { ICMP6_WRUREPLY, "who-are-you reply"}, + { ICMP6_NI_QUERY, "node information query"}, + { ICMP6_NI_REPLY, "node information reply"}, + { MLD6_MTRACE, "mtrace message"}, + { MLD6_MTRACE_RESP, "mtrace response"}, + { 0, NULL } +}; + +static struct tok icmp6_dst_unreach_code_values[] = { + { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" }, + { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"}, + { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"}, + { ICMP6_DST_UNREACH_ADDR, "unreachable address"}, + { ICMP6_DST_UNREACH_NOPORT, "unreachable port"}, + { 0, NULL } +}; + +static struct tok icmp6_opt_pi_flag_values[] = { + { ND_OPT_PI_FLAG_ONLINK, "onlink" }, + { ND_OPT_PI_FLAG_AUTO, "auto" }, + { ND_OPT_PI_FLAG_ROUTER, "router" }, + { 0, NULL } +}; + +static struct tok icmp6_opt_ra_flag_values[] = { + { ND_RA_FLAG_MANAGED, "managed" }, + { ND_RA_FLAG_OTHER, "other stateful"}, + { ND_RA_FLAG_HOME_AGENT, "home agent"}, + { 0, NULL } +}; + +static struct tok icmp6_nd_na_flag_values[] = { + { ND_NA_FLAG_ROUTER, "router" }, + { ND_NA_FLAG_SOLICITED, "solicited" }, + { ND_NA_FLAG_OVERRIDE, "override" }, + { 0, NULL } +}; + + +static struct tok icmp6_opt_values[] = { + { ND_OPT_SOURCE_LINKADDR, "source link-address"}, + { ND_OPT_TARGET_LINKADDR, "destination link-address"}, + { ND_OPT_PREFIX_INFORMATION, "prefix info"}, + { ND_OPT_REDIRECTED_HEADER, "redirected header"}, + { ND_OPT_MTU, "mtu"}, + { ND_OPT_ADVINTERVAL, "advertisement interval"}, + { ND_OPT_HOMEAGENT_INFO, "homeagent information"}, + { ND_OPT_ROUTE_INFO, "route info"}, + { 0, NULL } +}; + +/* mldv2 report types */ +static struct tok mldv2report2str[] = { + { 1, "is_in" }, + { 2, "is_ex" }, + { 3, "to_in" }, + { 4, "to_ex" }, + { 5, "allow" }, + { 6, "block" }, + { 0, NULL } +}; + +static const char * +get_rtpref(u_int v) +{ + static const char *rtpref_str[] = { + "medium", /* 00 */ + "high", /* 01 */ + "rsv", /* 10 */ + "low" /* 11 */ + }; + + return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff]; +} + +static const char * +get_lifetime(u_int32_t v) +{ + static char buf[20]; + + if (v == (u_int32_t)~0UL) + return "infinity"; + else { + snprintf(buf, sizeof(buf), "%u", v); + return buf; + } +} + +static void +print_lladdr(const u_int8_t *p, size_t l) +{ + const u_int8_t *ep, *q; + + q = p; + ep = p + l; + while (l > 0 && q < ep) { + if (q > p) + printf(":"); + printf("%02x", *q++); + l--; + } +} + +static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp, + u_int len) +{ + size_t i; + register const u_int16_t *sp; + u_int32_t sum; + union { + struct { + struct in6_addr ph_src; + struct in6_addr ph_dst; + u_int32_t ph_len; + u_int8_t ph_zero[3]; + u_int8_t ph_nxt; + } ph; + u_int16_t pa[20]; + } phu; + + /* pseudo-header */ + memset(&phu, 0, sizeof(phu)); + phu.ph.ph_src = ip6->ip6_src; + phu.ph.ph_dst = ip6->ip6_dst; + phu.ph.ph_len = htonl(len); + phu.ph.ph_nxt = IPPROTO_ICMPV6; + + sum = 0; + for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++) + sum += phu.pa[i]; + + sp = (const u_int16_t *)icp; + + for (i = 0; i < (len & ~1); i += 2) + sum += *sp++; + + if (len & 1) + sum += htons((*(const u_int8_t *)sp) << 8); + + while (sum > 0xffff) + sum = (sum & 0xffff) + (sum >> 16); + sum = ~sum & 0xffff; + + return (sum); +} + +void +icmp6_print(const u_char *bp, u_int length, const u_char *bp2, int fragmented) +{ + const struct icmp6_hdr *dp; + const struct ip6_hdr *ip; + const struct ip6_hdr *oip; + const struct udphdr *ouh; + int dport; + const u_char *ep; + u_int prot; + + dp = (struct icmp6_hdr *)bp; + ip = (struct ip6_hdr *)bp2; + oip = (struct ip6_hdr *)(dp + 1); + /* 'ep' points to the end of available data. */ + ep = snapend; + + TCHECK(dp->icmp6_cksum); + + if (vflag && !fragmented) { + int sum = dp->icmp6_cksum; + + if (TTEST2(bp[0], length)) { + sum = icmp6_cksum(ip, dp, length); + if (sum != 0) + (void)printf("[bad icmp6 cksum %x!] ", sum); + else + (void)printf("[icmp6 sum ok] "); + } + } + + printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)); + + /* display cosmetics: print the packet length for printer that use the vflag now */ + if (vflag && (dp->icmp6_type == + ND_ROUTER_SOLICIT || + ND_ROUTER_ADVERT || + ND_NEIGHBOR_ADVERT || + ND_NEIGHBOR_SOLICIT || + ND_REDIRECT || + ICMP6_HADISCOV_REPLY || + ICMP6_MOBILEPREFIX_ADVERT )) + printf(", length %u", length); + + switch (dp->icmp6_type) { + case ICMP6_DST_UNREACH: + TCHECK(oip->ip6_dst); + printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)); + switch (dp->icmp6_code) { + + case ICMP6_DST_UNREACH_NOROUTE: /* fall through */ + case ICMP6_DST_UNREACH_ADMIN: + case ICMP6_DST_UNREACH_ADDR: + printf(" %s",ip6addr_string(&oip->ip6_dst)); + break; + case ICMP6_DST_UNREACH_BEYONDSCOPE: + printf(" %s, source address %s", + ip6addr_string(&oip->ip6_dst), + ip6addr_string(&oip->ip6_src)); + break; + case ICMP6_DST_UNREACH_NOPORT: + if ((ouh = get_upperlayer((u_char *)oip, &prot)) + == NULL) + goto trunc; + + dport = EXTRACT_16BITS(&ouh->uh_dport); + switch (prot) { + case IPPROTO_TCP: + printf(", %s tcp port %s", + ip6addr_string(&oip->ip6_dst), + tcpport_string(dport)); + break; + case IPPROTO_UDP: + printf(", %s udp port %s", + ip6addr_string(&oip->ip6_dst), + udpport_string(dport)); + break; + default: + printf(", %s protocol %d port %d unreachable", + ip6addr_string(&oip->ip6_dst), + oip->ip6_nxt, dport); + break; + } + break; + default: + if (vflag <= 1) { + print_unknown_data(bp,"\n\t",length); + return; + } + break; + } + break; + case ICMP6_PACKET_TOO_BIG: + TCHECK(dp->icmp6_mtu); + printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)); + break; + case ICMP6_TIME_EXCEEDED: + TCHECK(oip->ip6_dst); + switch (dp->icmp6_code) { + case ICMP6_TIME_EXCEED_TRANSIT: + printf(" for %s", + ip6addr_string(&oip->ip6_dst)); + break; + case ICMP6_TIME_EXCEED_REASSEMBLY: + printf(" (reassembly)"); + break; + default: + printf(", unknown code (%u)", dp->icmp6_code); + break; + } + break; + case ICMP6_PARAM_PROB: + TCHECK(oip->ip6_dst); + switch (dp->icmp6_code) { + case ICMP6_PARAMPROB_HEADER: + printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); + break; + case ICMP6_PARAMPROB_NEXTHEADER: + printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); + break; + case ICMP6_PARAMPROB_OPTION: + printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); + break; + default: + printf(", code-#%d", + dp->icmp6_code); + break; + } + break; + case ICMP6_ECHO_REQUEST: + case ICMP6_ECHO_REPLY: + TCHECK(dp->icmp6_seq); + printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)); + break; + case ICMP6_MEMBERSHIP_QUERY: + if (length == MLD_MINLEN) { + mld6_print((const u_char *)dp); + } else if (length >= MLDV2_MINLEN) { + printf("v2 "); + mldv2_query_print((const u_char *)dp, length); + } else { + printf(" unknown-version (len %u) ", length); + } + break; + case ICMP6_MEMBERSHIP_REPORT: + mld6_print((const u_char *)dp); + break; + case ICMP6_MEMBERSHIP_REDUCTION: + mld6_print((const u_char *)dp); + break; + case ND_ROUTER_SOLICIT: +#define RTSOLLEN 8 + if (vflag) { + icmp6_opt_print((const u_char *)dp + RTSOLLEN, + length - RTSOLLEN); + } + break; + case ND_ROUTER_ADVERT: +#define RTADVLEN 16 + if (vflag) { + struct nd_router_advert *p; + + p = (struct nd_router_advert *)dp; + TCHECK(p->nd_ra_retransmit); + printf("\n\thop limit %u, Flags [%s]" \ + ", pref %s, router lifetime %us, reachable time %us, retrans time %us", + (u_int)p->nd_ra_curhoplimit, + bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)), + get_rtpref(p->nd_ra_flags_reserved), + EXTRACT_16BITS(&p->nd_ra_router_lifetime), + EXTRACT_32BITS(&p->nd_ra_reachable), + EXTRACT_32BITS(&p->nd_ra_retransmit)); + + icmp6_opt_print((const u_char *)dp + RTADVLEN, + length - RTADVLEN); + } + break; + case ND_NEIGHBOR_SOLICIT: + { + struct nd_neighbor_solicit *p; + p = (struct nd_neighbor_solicit *)dp; + TCHECK(p->nd_ns_target); + printf(", who has %s", ip6addr_string(&p->nd_ns_target)); + if (vflag) { +#define NDSOLLEN 24 + icmp6_opt_print((const u_char *)dp + NDSOLLEN, + length - NDSOLLEN); + } + } + break; + case ND_NEIGHBOR_ADVERT: + { + struct nd_neighbor_advert *p; + + p = (struct nd_neighbor_advert *)dp; + TCHECK(p->nd_na_target); + printf(", tgt is %s", + ip6addr_string(&p->nd_na_target)); + if (vflag) { + printf(", Flags [%s]", + bittok2str(icmp6_nd_na_flag_values, + "none", + EXTRACT_32BITS(&p->nd_na_flags_reserved))); +#define NDADVLEN 24 + icmp6_opt_print((const u_char *)dp + NDADVLEN, + length - NDADVLEN); +#undef NDADVLEN + } + } + break; + case ND_REDIRECT: +#define RDR(i) ((struct nd_redirect *)(i)) + TCHECK(RDR(dp)->nd_rd_dst); + printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst)); + TCHECK(RDR(dp)->nd_rd_target); + printf(" to %s", + getname6((const u_char*)&RDR(dp)->nd_rd_target)); +#define REDIRECTLEN 40 + if (vflag) { + icmp6_opt_print((const u_char *)dp + REDIRECTLEN, + length - REDIRECTLEN); + } + break; +#undef REDIRECTLEN +#undef RDR + case ICMP6_ROUTER_RENUMBERING: + icmp6_rrenum_print(bp, ep); + break; + case ICMP6_NI_QUERY: + case ICMP6_NI_REPLY: + icmp6_nodeinfo_print(length, bp, ep); + break; + case IND_SOLICIT: + case IND_ADVERT: + break; + case ICMP6_V2_MEMBERSHIP_REPORT: + mldv2_report_print((const u_char *) dp, length); + break; + case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */ + case ICMP6_HADISCOV_REQUEST: + TCHECK(dp->icmp6_data16[0]); + printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); + break; + case ICMP6_HADISCOV_REPLY: + if (vflag) { + struct in6_addr *in6; + u_char *cp; + + TCHECK(dp->icmp6_data16[0]); + printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); + cp = (u_char *)dp + length; + in6 = (struct in6_addr *)(dp + 1); + for (; (u_char *)in6 < cp; in6++) { + TCHECK(*in6); + printf(", %s", ip6addr_string(in6)); + } + } + break; + case ICMP6_MOBILEPREFIX_ADVERT: + if (vflag) { + TCHECK(dp->icmp6_data16[0]); + printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); + if (dp->icmp6_data16[1] & 0xc0) + printf(" "); + if (dp->icmp6_data16[1] & 0x80) + printf("M"); + if (dp->icmp6_data16[1] & 0x40) + printf("O"); +#define MPADVLEN 8 + icmp6_opt_print((const u_char *)dp + MPADVLEN, + length - MPADVLEN); + } + break; + default: + printf(", length %u", length); + if (vflag <= 1) + print_unknown_data(bp,"\n\t", length); + return; + } + if (!vflag) + printf(", length %u", length); + return; +trunc: + fputs("[|icmp6]", stdout); +} + +static struct udphdr * +get_upperlayer(u_char *bp, u_int *prot) +{ + const u_char *ep; + struct ip6_hdr *ip6 = (struct ip6_hdr *)bp; + struct udphdr *uh; + struct ip6_hbh *hbh; + struct ip6_frag *fragh; + struct ah *ah; + u_int nh; + int hlen; + + /* 'ep' points to the end of available data. */ + ep = snapend; + + if (!TTEST(ip6->ip6_nxt)) + return NULL; + + nh = ip6->ip6_nxt; + hlen = sizeof(struct ip6_hdr); + + while (bp < ep) { + bp += hlen; + + switch(nh) { + case IPPROTO_UDP: + case IPPROTO_TCP: + uh = (struct udphdr *)bp; + if (TTEST(uh->uh_dport)) { + *prot = nh; + return(uh); + } + else + return(NULL); + /* NOTREACHED */ + + case IPPROTO_HOPOPTS: + case IPPROTO_DSTOPTS: + case IPPROTO_ROUTING: + hbh = (struct ip6_hbh *)bp; + if (!TTEST(hbh->ip6h_len)) + return(NULL); + nh = hbh->ip6h_nxt; + hlen = (hbh->ip6h_len + 1) << 3; + break; + + case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */ + fragh = (struct ip6_frag *)bp; + if (!TTEST(fragh->ip6f_offlg)) + return(NULL); + /* fragments with non-zero offset are meaningless */ + if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) + return(NULL); + nh = fragh->ip6f_nxt; + hlen = sizeof(struct ip6_frag); + break; + + case IPPROTO_AH: + ah = (struct ah *)bp; + if (!TTEST(ah->ah_len)) + return(NULL); + nh = ah->ah_nxt; + hlen = (ah->ah_len + 2) << 2; + break; + + default: /* unknown or undecodable header */ + *prot = nh; /* meaningless, but set here anyway */ + return(NULL); + } + } + + return(NULL); /* should be notreached, though */ +} + +static void +icmp6_opt_print(const u_char *bp, int resid) +{ + const struct nd_opt_hdr *op; + const struct nd_opt_hdr *opl; /* why there's no struct? */ + const struct nd_opt_prefix_info *opp; + const struct icmp6_opts_redirect *opr; + const struct nd_opt_mtu *opm; + const struct nd_opt_advinterval *opa; + const struct nd_opt_homeagent_info *oph; + const struct nd_opt_route_info *opri; + const u_char *cp, *ep; + struct in6_addr in6, *in6p; + size_t l; + +#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return + + cp = bp; + /* 'ep' points to the end of available data. */ + ep = snapend; + + while (cp < ep) { + op = (struct nd_opt_hdr *)cp; + + ECHECK(op->nd_opt_len); + if (resid <= 0) + return; + if (op->nd_opt_len == 0) + goto trunc; + if (cp + (op->nd_opt_len << 3) > ep) + goto trunc; + + printf("\n\t %s option (%u), length %u (%u): ", + tok2str(icmp6_opt_values, "unknown", op->nd_opt_type), + op->nd_opt_type, + op->nd_opt_len << 3, + op->nd_opt_len); + + switch (op->nd_opt_type) { + case ND_OPT_SOURCE_LINKADDR: + opl = (struct nd_opt_hdr *)op; + l = (op->nd_opt_len << 3) - 2; + print_lladdr(cp + 2, l); + break; + case ND_OPT_TARGET_LINKADDR: + opl = (struct nd_opt_hdr *)op; + l = (op->nd_opt_len << 3) - 2; + print_lladdr(cp + 2, l); + break; + case ND_OPT_PREFIX_INFORMATION: + opp = (struct nd_opt_prefix_info *)op; + TCHECK(opp->nd_opt_pi_prefix); + printf("%s/%u%s, Flags [%s], valid time %ss", + ip6addr_string(&opp->nd_opt_pi_prefix), + opp->nd_opt_pi_prefix_len, + (op->nd_opt_len != 4) ? "badlen" : "", + bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved), + get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))); + printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))); + break; + case ND_OPT_REDIRECTED_HEADER: + opr = (struct icmp6_opts_redirect *)op; + print_unknown_data(bp,"\n\t ",op->nd_opt_len<<3); + /* xxx */ + break; + case ND_OPT_MTU: + opm = (struct nd_opt_mtu *)op; + TCHECK(opm->nd_opt_mtu_mtu); + printf(" %u%s", + EXTRACT_32BITS(&opm->nd_opt_mtu_mtu), + (op->nd_opt_len != 1) ? "bad option length" : "" ); + break; + case ND_OPT_ADVINTERVAL: + opa = (struct nd_opt_advinterval *)op; + TCHECK(opa->nd_opt_adv_interval); + printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval)); + break; + case ND_OPT_HOMEAGENT_INFO: + oph = (struct nd_opt_homeagent_info *)op; + TCHECK(oph->nd_opt_hai_lifetime); + printf(" preference %u, lifetime %u", + EXTRACT_16BITS(&oph->nd_opt_hai_preference), + EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)); + break; + case ND_OPT_ROUTE_INFO: + opri = (struct nd_opt_route_info *)op; + TCHECK(opri->nd_opt_rti_lifetime); + memset(&in6, 0, sizeof(in6)); + in6p = (struct in6_addr *)(opri + 1); + switch (op->nd_opt_len) { + case 1: + break; + case 2: + TCHECK2(*in6p, 8); + memcpy(&in6, opri + 1, 8); + break; + case 3: + TCHECK(*in6p); + memcpy(&in6, opri + 1, sizeof(in6)); + break; + default: + goto trunc; + } + printf(" %s/%u", ip6addr_string(&in6), + opri->nd_opt_rti_prefixlen); + printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags)); + printf(", lifetime=%s", + get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))); + break; + default: + if (vflag <= 1) { + print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ + return; + } + break; + } + /* do we want to see an additional hexdump ? */ + if (vflag> 1) + print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ + + cp += op->nd_opt_len << 3; + resid -= op->nd_opt_len << 3; + } + return; + + trunc: + fputs("[ndp opt]", stdout); + return; +#undef ECHECK +} + +static void +mld6_print(const u_char *bp) +{ + struct mld6_hdr *mp = (struct mld6_hdr *)bp; + const u_char *ep; + + /* 'ep' points to the end of available data. */ + ep = snapend; + + if ((u_char *)mp + sizeof(*mp) > ep) + return; + + printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)); + printf("addr: %s", ip6addr_string(&mp->mld6_addr)); +} + +static void +mldv2_report_print(const u_char *bp, u_int len) +{ + struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; + u_int group, nsrcs, ngroups; + u_int i, j; + + /* Minimum len is 8 */ + if (len < 8) { + printf(" [invalid len %d]", len); + return; + } + + TCHECK(icp->icmp6_data16[1]); + ngroups = ntohs(icp->icmp6_data16[1]); + printf(", %d group record(s)", ngroups); + if (vflag > 0) { + /* Print the group records */ + group = 8; + for (i = 0; i < ngroups; i++) { + /* type(1) + auxlen(1) + numsrc(2) + grp(16) */ + if (len < group + 20) { + printf(" [invalid number of groups]"); + return; + } + TCHECK2(bp[group + 4], sizeof(struct in6_addr)); + printf(" [gaddr %s", ip6addr_string(&bp[group + 4])); + printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]", + bp[group])); + nsrcs = (bp[group + 2] << 8) + bp[group + 3]; + /* Check the number of sources and print them */ + if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) { + printf(" [invalid number of sources %d]", nsrcs); + return; + } + if (vflag == 1) + printf(", %d source(s)", nsrcs); + else { + /* Print the sources */ + (void)printf(" {"); + for (j = 0; j < nsrcs; j++) { + TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)], + sizeof(struct in6_addr)); + printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)])); + } + (void)printf(" }"); + } + /* Next group record */ + group += 20 + nsrcs * sizeof(struct in6_addr); + printf("]"); + } + } + return; +trunc: + (void)printf("[|icmp6]"); + return; +} + +static void +mldv2_query_print(const u_char *bp, u_int len) +{ + struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; + u_int mrc; + int mrt, qqi; + u_int nsrcs; + register u_int i; + + /* Minimum len is 28 */ + if (len < 28) { + printf(" [invalid len %d]", len); + return; + } + TCHECK(icp->icmp6_data16[0]); + mrc = ntohs(icp->icmp6_data16[0]); + if (mrc < 32768) { + mrt = mrc; + } else { + mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); + } + if (vflag) { + (void)printf(" [max resp delay=%d]", mrt); + } + TCHECK2(bp[8], sizeof(struct in6_addr)); + printf(" [gaddr %s", ip6addr_string(&bp[8])); + + if (vflag) { + TCHECK(bp[25]); + if (bp[24] & 0x08) { + printf(" sflag"); + } + if (bp[24] & 0x07) { + printf(" robustness=%d", bp[24] & 0x07); + } + if (bp[25] < 128) { + qqi = bp[25]; + } else { + qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3); + } + printf(" qqi=%d", qqi); + } + + TCHECK2(bp[26], 2); + nsrcs = ntohs(*(u_short *)&bp[26]); + if (nsrcs > 0) { + if (len < 28 + nsrcs * sizeof(struct in6_addr)) + printf(" [invalid number of sources]"); + else if (vflag > 1) { + printf(" {"); + for (i = 0; i < nsrcs; i++) { + TCHECK2(bp[28 + i * sizeof(struct in6_addr)], + sizeof(struct in6_addr)); + printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)])); + } + printf(" }"); + } else + printf(", %d source(s)", nsrcs); + } + printf("]"); + return; +trunc: + (void)printf("[|icmp6]"); + return; +} + +void +dnsname_print(const u_char *cp, const u_char *ep) +{ + int i; + + /* DNS name decoding - no decompression */ + printf(", \""); + while (cp < ep) { + i = *cp++; + if (i) { + if (i > ep - cp) { + printf("???"); + break; + } + while (i-- && cp < ep) { + safeputchar(*cp); + cp++; + } + if (cp + 1 < ep && *cp) + printf("."); + } else { + if (cp == ep) { + /* FQDN */ + printf("."); + } else if (cp + 1 == ep && *cp == '\0') { + /* truncated */ + } else { + /* invalid */ + printf("???"); + } + break; + } + } + printf("\""); +} + +static void +icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep) +{ + struct icmp6_nodeinfo *ni6; + struct icmp6_hdr *dp; + const u_char *cp; + size_t siz, i; + int needcomma; + + if (ep < bp) + return; + dp = (struct icmp6_hdr *)bp; + ni6 = (struct icmp6_nodeinfo *)bp; + siz = ep - bp; + + switch (ni6->ni_type) { + case ICMP6_NI_QUERY: + if (siz == sizeof(*dp) + 4) { + /* KAME who-are-you */ + printf(" who-are-you request"); + break; + } + printf(" node information query"); + + TCHECK2(*dp, sizeof(*ni6)); + ni6 = (struct icmp6_nodeinfo *)dp; + printf(" ("); /*)*/ + switch (EXTRACT_16BITS(&ni6->ni_qtype)) { + case NI_QTYPE_NOOP: + printf("noop"); + break; + case NI_QTYPE_SUPTYPES: + printf("supported qtypes"); + i = EXTRACT_16BITS(&ni6->ni_flags); + if (i) + printf(" [%s]", (i & 0x01) ? "C" : ""); + break; + break; + case NI_QTYPE_FQDN: + printf("DNS name"); + break; + case NI_QTYPE_NODEADDR: + printf("node addresses"); + i = ni6->ni_flags; + if (!i) + break; + /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ + printf(" [%s%s%s%s%s%s]", + (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", + (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", + (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", + (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", + (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", + (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""); + break; + default: + printf("unknown"); + break; + } + + if (ni6->ni_qtype == NI_QTYPE_NOOP || + ni6->ni_qtype == NI_QTYPE_SUPTYPES) { + if (siz != sizeof(*ni6)) + if (vflag) + printf(", invalid len"); + /*(*/ + printf(")"); + break; + } + + + /* XXX backward compat, icmp-name-lookup-03 */ + if (siz == sizeof(*ni6)) { + printf(", 03 draft"); + /*(*/ + printf(")"); + break; + } + + switch (ni6->ni_code) { + case ICMP6_NI_SUBJ_IPV6: + if (!TTEST2(*dp, + sizeof(*ni6) + sizeof(struct in6_addr))) + break; + if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) { + if (vflag) + printf(", invalid subject len"); + break; + } + printf(", subject=%s", + getname6((const u_char *)(ni6 + 1))); + break; + case ICMP6_NI_SUBJ_FQDN: + printf(", subject=DNS name"); + cp = (const u_char *)(ni6 + 1); + if (cp[0] == ep - cp - 1) { + /* icmp-name-lookup-03, pascal string */ + if (vflag) + printf(", 03 draft"); + cp++; + printf(", \""); + while (cp < ep) { + safeputchar(*cp); + cp++; + } + printf("\""); + } else + dnsname_print(cp, ep); + break; + case ICMP6_NI_SUBJ_IPV4: + if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr))) + break; + if (siz != sizeof(*ni6) + sizeof(struct in_addr)) { + if (vflag) + printf(", invalid subject len"); + break; + } + printf(", subject=%s", + getname((const u_char *)(ni6 + 1))); + break; + default: + printf(", unknown subject"); + break; + } + + /*(*/ + printf(")"); + break; + + case ICMP6_NI_REPLY: + if (icmp6len > siz) { + printf("[|icmp6: node information reply]"); + break; + } + + needcomma = 0; + + ni6 = (struct icmp6_nodeinfo *)dp; + printf(" node information reply"); + printf(" ("); /*)*/ + switch (ni6->ni_code) { + case ICMP6_NI_SUCCESS: + if (vflag) { + printf("success"); + needcomma++; + } + break; + case ICMP6_NI_REFUSED: + printf("refused"); + needcomma++; + if (siz != sizeof(*ni6)) + if (vflag) + printf(", invalid length"); + break; + case ICMP6_NI_UNKNOWN: + printf("unknown"); + needcomma++; + if (siz != sizeof(*ni6)) + if (vflag) + printf(", invalid length"); + break; + } + + if (ni6->ni_code != ICMP6_NI_SUCCESS) { + /*(*/ + printf(")"); + break; + } + + switch (EXTRACT_16BITS(&ni6->ni_qtype)) { + case NI_QTYPE_NOOP: + if (needcomma) + printf(", "); + printf("noop"); + if (siz != sizeof(*ni6)) + if (vflag) + printf(", invalid length"); + break; + case NI_QTYPE_SUPTYPES: + if (needcomma) + printf(", "); + printf("supported qtypes"); + i = EXTRACT_16BITS(&ni6->ni_flags); + if (i) + printf(" [%s]", (i & 0x01) ? "C" : ""); + break; + case NI_QTYPE_FQDN: + if (needcomma) + printf(", "); + printf("DNS name"); + cp = (const u_char *)(ni6 + 1) + 4; + if (cp[0] == ep - cp - 1) { + /* icmp-name-lookup-03, pascal string */ + if (vflag) + printf(", 03 draft"); + cp++; + printf(", \""); + while (cp < ep) { + safeputchar(*cp); + cp++; + } + printf("\""); + } else + dnsname_print(cp, ep); + if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0) + printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1)); + break; + case NI_QTYPE_NODEADDR: + if (needcomma) + printf(", "); + printf("node addresses"); + i = sizeof(*ni6); + while (i < siz) { + if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz) + break; + printf(" %s", getname6(bp + i)); + i += sizeof(struct in6_addr); + printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i)); + i += sizeof(int32_t); + } + i = ni6->ni_flags; + if (!i) + break; + printf(" [%s%s%s%s%s%s%s]", + (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", + (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", + (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", + (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", + (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", + (i & NI_NODEADDR_FLAG_ALL) ? "A" : "", + (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""); + break; + default: + if (needcomma) + printf(", "); + printf("unknown"); + break; + } + + /*(*/ + printf(")"); + break; + } + return; + +trunc: + fputs("[|icmp6]", stdout); +} + +static void +icmp6_rrenum_print(const u_char *bp, const u_char *ep) +{ + struct icmp6_router_renum *rr6; + const char *cp; + struct rr_pco_match *match; + struct rr_pco_use *use; + char hbuf[NI_MAXHOST]; + int n; + + if (ep < bp) + return; + rr6 = (struct icmp6_router_renum *)bp; + cp = (const char *)(rr6 + 1); + + TCHECK(rr6->rr_reserved); + switch (rr6->rr_code) { + case ICMP6_ROUTER_RENUMBERING_COMMAND: + printf("router renum: command"); + break; + case ICMP6_ROUTER_RENUMBERING_RESULT: + printf("router renum: result"); + break; + case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: + printf("router renum: sequence number reset"); + break; + default: + printf("router renum: code-#%d", rr6->rr_code); + break; + } + + printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)); + + if (vflag) { +#define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "") + printf("["); /*]*/ + if (rr6->rr_flags) { + printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"), + F(ICMP6_RR_FLAGS_REQRESULT, "R"), + F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"), + F(ICMP6_RR_FLAGS_SPECSITE, "S"), + F(ICMP6_RR_FLAGS_PREVDONE, "P")); + } + printf("seg=%u,", rr6->rr_segnum); + printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)); + if (rr6->rr_reserved) + printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)); + /*[*/ + printf("]"); +#undef F + } + + if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) { + match = (struct rr_pco_match *)cp; + cp = (const char *)(match + 1); + + TCHECK(match->rpm_prefix); + + if (vflag > 1) + printf("\n\t"); + else + printf(" "); + printf("match("); /*)*/ + switch (match->rpm_code) { + case RPM_PCO_ADD: printf("add"); break; + case RPM_PCO_CHANGE: printf("change"); break; + case RPM_PCO_SETGLOBAL: printf("setglobal"); break; + default: printf("#%u", match->rpm_code); break; + } + + if (vflag) { + printf(",ord=%u", match->rpm_ordinal); + printf(",min=%u", match->rpm_minlen); + printf(",max=%u", match->rpm_maxlen); + } + if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf))) + printf(",%s/%u", hbuf, match->rpm_matchlen); + else + printf(",?/%u", match->rpm_matchlen); + /*(*/ + printf(")"); + + n = match->rpm_len - 3; + if (n % 4) + goto trunc; + n /= 4; + while (n-- > 0) { + use = (struct rr_pco_use *)cp; + cp = (const char *)(use + 1); + + TCHECK(use->rpu_prefix); + + if (vflag > 1) + printf("\n\t"); + else + printf(" "); + printf("use("); /*)*/ + if (use->rpu_flags) { +#define F(x, y) ((use->rpu_flags) & (x) ? (y) : "") + printf("%s%s,", + F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), + F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")); +#undef F + } + if (vflag) { + printf("mask=0x%x,", use->rpu_ramask); + printf("raflags=0x%x,", use->rpu_raflags); + if (~use->rpu_vltime == 0) + printf("vltime=infty,"); + else + printf("vltime=%u,", + EXTRACT_32BITS(&use->rpu_vltime)); + if (~use->rpu_pltime == 0) + printf("pltime=infty,"); + else + printf("pltime=%u,", + EXTRACT_32BITS(&use->rpu_pltime)); + } + if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf, + sizeof(hbuf))) + printf("%s/%u/%u", hbuf, use->rpu_uselen, + use->rpu_keeplen); + else + printf("?/%u/%u", use->rpu_uselen, + use->rpu_keeplen); + /*(*/ + printf(")"); + } + } + + return; + +trunc: + fputs("[|icmp6]", stdout); +} + +#endif /* INET6 */ |
