/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 3. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#endif
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.5 2000-04-28 11:14:48 itojun Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.18 2005-04-20 22:18:50 guy Exp $";
#endif
#ifdef INET6
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <netinet/ip6.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
+#include "ip6.h"
+
#include "interface.h"
#include "addrtoname.h"
+#include "extract.h"
-void
-ip6_opt_print(const u_char *bp, int len)
+/* items outside of rfc2292bis */
+#ifndef IP6OPT_MINLEN
+#define IP6OPT_MINLEN 2
+#endif
+#ifndef IP6OPT_RTALERT_LEN
+#define IP6OPT_RTALERT_LEN 4
+#endif
+#ifndef IP6OPT_JUMBO_LEN
+#define IP6OPT_JUMBO_LEN 6
+#endif
+#define IP6OPT_HOMEADDR_MINLEN 18
+#define IP6OPT_BU_MINLEN 10
+#define IP6OPT_BA_MINLEN 13
+#define IP6OPT_BR_MINLEN 2
+#define IP6SOPT_UI 0x2
+#define IP6SOPT_UI_MINLEN 4
+#define IP6SOPT_ALTCOA 0x3
+#define IP6SOPT_ALTCOA_MINLEN 18
+#define IP6SOPT_AUTH 0x4
+#define IP6SOPT_AUTH_MINLEN 6
+
+static void ip6_sopt_print(const u_char *, int);
+
+static void
+ip6_sopt_print(const u_char *bp, int len)
{
int i;
int optlen;
for (i = 0; i < len; i += optlen) {
+ if (bp[i] == IP6OPT_PAD1)
+ optlen = 1;
+ else {
+ if (i + 1 < len)
+ optlen = bp[i + 1] + 2;
+ else
+ goto trunc;
+ }
+ if (i + optlen > len)
+ goto trunc;
+
switch (bp[i]) {
-#ifndef IP6OPT_PAD1
-#define IP6OPT_PAD1 0x00
-#endif
case IP6OPT_PAD1:
+ printf(", pad1");
+ break;
+ case IP6OPT_PADN:
+ if (len - i < IP6OPT_MINLEN) {
+ printf(", padn: trunc");
+ goto trunc;
+ }
+ printf(", padn");
+ break;
+ case IP6SOPT_UI:
+ if (len - i < IP6SOPT_UI_MINLEN) {
+ printf(", ui: trunc");
+ goto trunc;
+ }
+ printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
+ break;
+ case IP6SOPT_ALTCOA:
+ if (len - i < IP6SOPT_ALTCOA_MINLEN) {
+ printf(", altcoa: trunc");
+ goto trunc;
+ }
+ printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
+ break;
+ case IP6SOPT_AUTH:
+ if (len - i < IP6SOPT_AUTH_MINLEN) {
+ printf(", auth: trunc");
+ goto trunc;
+ }
+ printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
+ break;
+ default:
+ if (len - i < IP6OPT_MINLEN) {
+ printf(", sopt_type %d: trunc)", bp[i]);
+ goto trunc;
+ }
+ printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
+ break;
+ }
+ }
+ return;
+
+trunc:
+ printf("[trunc] ");
+}
+
+void
+ip6_opt_print(const u_char *bp, int len)
+{
+ int i;
+ int optlen = 0;
+
+ for (i = 0; i < len; i += optlen) {
+ if (bp[i] == IP6OPT_PAD1)
optlen = 1;
+ else {
+ if (i + 1 < len)
+ optlen = bp[i + 1] + 2;
+ else
+ goto trunc;
+ }
+ if (i + optlen > len)
+ goto trunc;
+
+ switch (bp[i]) {
+ case IP6OPT_PAD1:
+ printf("(pad1)");
break;
-#ifndef IP6OPT_PADN
-#define IP6OPT_PADN 0x01
-#endif
case IP6OPT_PADN:
-#ifndef IP6OPT_MINLEN
-#define IP6OPT_MINLEN 2
-#endif
if (len - i < IP6OPT_MINLEN) {
printf("(padn: trunc)");
goto trunc;
}
- optlen = bp[i + 1] + 2;
+ printf("(padn)");
break;
-#ifndef IP6OPT_RTALERT
-#define IP6OPT_RTALERT 0x05
-#endif
- case IP6OPT_RTALERT:
-#ifndef IP6OPT_RTALERT_LEN
-#define IP6OPT_RTALERT_LEN 4
-#endif
+ case IP6OPT_ROUTER_ALERT:
if (len - i < IP6OPT_RTALERT_LEN) {
printf("(rtalert: trunc)");
goto trunc;
printf("(rtalert: invalid len %d)", bp[i + 1]);
goto trunc;
}
- printf("(rtalert: 0x%04x) ", ntohs(*(u_int16_t *)&bp[i + 2]));
- optlen = IP6OPT_RTALERT_LEN;
+ printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
break;
-#ifndef IP6OPT_JUMBO
-#define IP6OPT_JUMBO 0xC2
-#endif
case IP6OPT_JUMBO:
-#ifndef IP6OPT_JUMBO_LEN
-#define IP6OPT_JUMBO_LEN 6
-#endif
if (len - i < IP6OPT_JUMBO_LEN) {
printf("(jumbo: trunc)");
goto trunc;
printf("(jumbo: invalid len %d)", bp[i + 1]);
goto trunc;
}
- printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
- optlen = IP6OPT_JUMBO_LEN;
+ printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
+ break;
+ case IP6OPT_HOME_ADDRESS:
+ if (len - i < IP6OPT_HOMEADDR_MINLEN) {
+ printf("(homeaddr: trunc)");
+ goto trunc;
+ }
+ if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
+ printf("(homeaddr: invalid len %d)", bp[i + 1]);
+ goto trunc;
+ }
+ printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
+ if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
+ ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
+ (optlen - IP6OPT_HOMEADDR_MINLEN));
+ }
+ printf(")");
+ break;
+ case IP6OPT_BINDING_UPDATE:
+ if (len - i < IP6OPT_BU_MINLEN) {
+ printf("(bu: trunc)");
+ goto trunc;
+ }
+ if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
+ printf("(bu: invalid len %d)", bp[i + 1]);
+ goto trunc;
+ }
+ printf("(bu: ");
+ if (bp[i + 2] & 0x80)
+ printf("A");
+ if (bp[i + 2] & 0x40)
+ printf("H");
+ if (bp[i + 2] & 0x20)
+ printf("S");
+ if (bp[i + 2] & 0x10)
+ printf("D");
+ if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
+ printf("res");
+ printf(", sequence: %u", bp[i + 5]);
+ printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));
+
+ if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
+ ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
+ (optlen - IP6OPT_BU_MINLEN));
+ }
+ printf(")");
+ break;
+ case IP6OPT_BINDING_ACK:
+ if (len - i < IP6OPT_BA_MINLEN) {
+ printf("(ba: trunc)");
+ goto trunc;
+ }
+ if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
+ printf("(ba: invalid len %d)", bp[i + 1]);
+ goto trunc;
+ }
+ printf("(ba: ");
+ printf("status: %u", bp[i + 2]);
+ if (bp[i + 3])
+ printf("res");
+ printf(", sequence: %u", bp[i + 4]);
+ printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
+ printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));
+
+ if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
+ ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
+ (optlen - IP6OPT_BA_MINLEN));
+ }
+ printf(")");
+ break;
+ case IP6OPT_BINDING_REQ:
+ if (len - i < IP6OPT_BR_MINLEN) {
+ printf("(br: trunc)");
+ goto trunc;
+ }
+ printf("(br");
+ if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
+ ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
+ (optlen - IP6OPT_BR_MINLEN));
+ }
+ printf(")");
break;
default:
if (len - i < IP6OPT_MINLEN) {
printf("(type %d: trunc)", bp[i]);
goto trunc;
}
- printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
- optlen = bp[i + 1] + 2;
+ printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
break;
}
}
hbhopt_print(register const u_char *bp)
{
const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
- register const u_char *ep;
int hbhlen = 0;
- /* 'ep' points to the end of avaible data. */
- ep = snapend;
TCHECK(dp->ip6h_len);
hbhlen = (int)((dp->ip6h_len + 1) << 3);
- TCHECK2(dp, hbhlen);
+ TCHECK2(*dp, hbhlen);
printf("HBH ");
if (vflag)
ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
trunc:
fputs("[|HBH]", stdout);
- return(hbhlen);
+ return(-1);
}
int
dstopt_print(register const u_char *bp)
{
const struct ip6_dest *dp = (struct ip6_dest *)bp;
- register const u_char *ep;
int dstoptlen = 0;
- /* 'ep' points to the end of avaible data. */
- ep = snapend;
TCHECK(dp->ip6d_len);
dstoptlen = (int)((dp->ip6d_len + 1) << 3);
- TCHECK2(dp, dstoptlen);
+ TCHECK2(*dp, dstoptlen);
printf("DSTOPT ");
if (vflag) {
ip6_opt_print((const u_char *)dp + sizeof(*dp),
trunc:
fputs("[|DSTOPT]", stdout);
- return(dstoptlen);
+ return(-1);
}
#endif /* INET6 */
projects / tcpdump / blobdiff