*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.69 2003-03-13 07:36:56 guy Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.77 2004-06-16 00:06:28 guy Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "ip6.h"
#include "icmp6.h"
+#include "ipproto.h"
#include "interface.h"
#include "addrtoname.h"
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(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
+/* 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 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, const u_char *bp2)
+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;
int dport;
const u_char *ep;
char buf[256];
- u_int icmp6len, prot;
+ u_int prot;
dp = (struct icmp6_hdr *)bp;
ip = (struct ip6_hdr *)bp2;
str = buf;
/* 'ep' points to the end of available data. */
ep = snapend;
- if (ip->ip6_plen)
- icmp6len = (EXTRACT_16BITS(&ip->ip6_plen) + sizeof(struct ip6_hdr) -
- (bp - bp2));
- else /* XXX: jumbo payload case... */
- icmp6len = snapend - bp;
- TCHECK(dp->icmp6_code);
+ 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] ");
+ }
+ }
+
switch (dp->icmp6_type) {
case ICMP6_DST_UNREACH:
TCHECK(oip->ip6_dst);
break;
case ICMP6_MEMBERSHIP_QUERY:
printf("icmp6: multicast listener query ");
- mld6_print((const u_char *)dp);
+ 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=%d) ", length);
+ }
break;
case ICMP6_MEMBERSHIP_REPORT:
printf("icmp6: multicast listener report ");
if (vflag) {
#define RTSOLLEN 8
icmp6_opt_print((const u_char *)dp + RTSOLLEN,
- icmp6len - RTSOLLEN);
+ length - RTSOLLEN);
}
break;
case ND_ROUTER_ADVERT:
EXTRACT_32BITS(&p->nd_ra_retransmit));
#define RTADVLEN 16
icmp6_opt_print((const u_char *)dp + RTADVLEN,
- icmp6len - RTADVLEN);
+ length - RTADVLEN);
}
break;
case ND_NEIGHBOR_SOLICIT:
if (vflag) {
#define NDSOLLEN 24
icmp6_opt_print((const u_char *)dp + NDSOLLEN,
- icmp6len - NDSOLLEN);
+ length - NDSOLLEN);
}
}
break;
}
#define NDADVLEN 24
icmp6_opt_print((const u_char *)dp + NDADVLEN,
- icmp6len - NDADVLEN);
+ length - NDADVLEN);
#undef NDADVLEN
}
}
TCHECK(RDR(dp)->nd_rd_dst);
printf("icmp6: redirect %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,
- icmp6len - REDIRECTLEN);
+ length - REDIRECTLEN);
}
break;
#undef REDIRECTLEN
#undef RDR
case ICMP6_ROUTER_RENUMBERING:
- icmp6_rrenum_print(icmp6len, bp, ep);
+ icmp6_rrenum_print(bp, ep);
break;
case ICMP6_NI_QUERY:
case ICMP6_NI_REPLY:
- icmp6_nodeinfo_print(icmp6len, bp, ep);
+ icmp6_nodeinfo_print(length, bp, ep);
+ break;
+ case IND_SOLICIT:
+ printf("icmp6: inverse neighbor solicitation");
+ break;
+ case IND_ADVERT:
+ printf("icmp6: inverse neighbor advertisement");
+ break;
+ case ICMP6_V2_MEMBERSHIP_REPORT:
+ printf("icmp6: multicast listener report v2 ");
+ mldv2_report_print((const u_char *) dp, length);
break;
case ICMP6_HADISCOV_REQUEST:
printf("icmp6: ha discovery request");
TCHECK(dp->icmp6_data16[0]);
printf("(id=%d", EXTRACT_16BITS(&dp->icmp6_data16[0]));
- cp = (u_char *)dp + icmp6len;
+ cp = (u_char *)dp + length;
in6 = (struct in6_addr *)(dp + 1);
for (; (u_char *)in6 < cp; in6++) {
TCHECK(*in6);
printf(")");
#define MPADVLEN 8
icmp6_opt_print((const u_char *)dp + MPADVLEN,
- icmp6len - MPADVLEN);
+ length - MPADVLEN);
}
break;
default:
}
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;
+ }
+ TCHECK(bp[group + 4]);
+ 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 * 16)) {
+ 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 * 16], 16);
+ printf(" %s", ip6addr_string(&bp[group + 20 + j * 16]));
+ }
+ (void)printf(" }");
+ }
+ /* Next group record */
+ group += 20 + nsrcs * 16;
+ 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);
+ }
+ 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);
+ }
+
+ nsrcs = ntohs(*(u_short *)&bp[26]);
+ if (nsrcs > 0) {
+ if (len < 28 + nsrcs * 16)
+ printf(" [invalid number of sources]");
+ else if (vflag > 1) {
+ printf(" {");
+ for (i = 0; i < nsrcs; i++) {
+ TCHECK2(bp[28 + i * 16], 16);
+ printf(" %s", ip6addr_string(&bp[28 + i * 16]));
+ }
+ 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;
}
static void
-icmp6_rrenum_print(u_int icmp6len, const u_char *bp, const u_char *ep)
+icmp6_rrenum_print(const u_char *bp, const u_char *ep)
{
struct icmp6_router_renum *rr6;
struct icmp6_hdr *dp;
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