/*
* 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
* SUCH DAMAGE.
*/
+/* \summary: IPv6 header option printer */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.4 2000-04-09 19:15:59 assar 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 <netdissect-stdinc.h>
-#include <stdio.h>
+#include "ip6.h"
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "extract.h"
-void
-ip6_opt_print(const u_char *bp, int len)
+static void
+ip6_sopt_print(netdissect_options *ndo, 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:
+ ND_PRINT((ndo, ", pad1"));
+ break;
+ case IP6OPT_PADN:
+ if (len - i < IP6OPT_MINLEN) {
+ ND_PRINT((ndo, ", padn: trunc"));
+ goto trunc;
+ }
+ ND_PRINT((ndo, ", padn"));
+ break;
+ default:
+ if (len - i < IP6OPT_MINLEN) {
+ ND_PRINT((ndo, ", sopt_type %d: trunc)", bp[i]));
+ goto trunc;
+ }
+ ND_PRINT((ndo, ", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]));
+ break;
+ }
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[trunc] "));
+}
+
+static void
+ip6_opt_print(netdissect_options *ndo, const u_char *bp, int len)
+{
+ int i;
+ int optlen = 0;
+
+ if (len == 0)
+ return;
+ 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:
+ ND_PRINT((ndo, "(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)");
+ ND_PRINT((ndo, "(padn: trunc)"));
goto trunc;
}
- optlen = bp[i + 1] + 2;
+ ND_PRINT((ndo, "(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)");
+ ND_PRINT((ndo, "(rtalert: trunc)"));
goto trunc;
}
if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
- printf("(rtalert: invalid len %d)", bp[i + 1]);
+ ND_PRINT((ndo, "(rtalert: invalid len %d)", bp[i + 1]));
goto trunc;
}
- printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2]));
- optlen = IP6OPT_RTALERT_LEN;
+ ND_PRINT((ndo, "(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)");
+ ND_PRINT((ndo, "(jumbo: trunc)"));
goto trunc;
}
if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
- printf("(jumbo: invalid len %d)", bp[i + 1]);
+ ND_PRINT((ndo, "(jumbo: invalid len %d)", bp[i + 1]));
goto trunc;
}
- printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
- optlen = IP6OPT_JUMBO_LEN;
+ ND_PRINT((ndo, "(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2])));
+ break;
+ case IP6OPT_HOME_ADDRESS:
+ if (len - i < IP6OPT_HOMEADDR_MINLEN) {
+ ND_PRINT((ndo, "(homeaddr: trunc)"));
+ goto trunc;
+ }
+ if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
+ ND_PRINT((ndo, "(homeaddr: invalid len %d)", bp[i + 1]));
+ goto trunc;
+ }
+ ND_PRINT((ndo, "(homeaddr: %s", ip6addr_string(ndo, &bp[i + 2])));
+ if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
+ ip6_sopt_print(ndo, &bp[i + IP6OPT_HOMEADDR_MINLEN],
+ (optlen - IP6OPT_HOMEADDR_MINLEN));
+ }
+ ND_PRINT((ndo, ")"));
break;
default:
if (len - i < IP6OPT_MINLEN) {
- printf("(type %d: trunc)", bp[i]);
+ ND_PRINT((ndo, "(type %d: trunc)", bp[i]));
goto trunc;
}
- printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
- optlen = bp[i + 1] + 2;
+ ND_PRINT((ndo, "(opt_type 0x%02x: len=%d)", bp[i], bp[i + 1]));
break;
}
}
-
-#if 0
-end:
-#endif
+ ND_PRINT((ndo, " "));
return;
trunc:
- printf("[trunc] ");
+ ND_PRINT((ndo, "[trunc] "));
}
int
-hbhopt_print(register const u_char *bp)
+hbhopt_print(netdissect_options *ndo, register const u_char *bp)
{
- const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
- register const u_char *ep;
+ const struct ip6_hbh *dp = (const struct ip6_hbh *)bp;
int hbhlen = 0;
- /* 'ep' points to the end of avaible data. */
- ep = snapend;
- TCHECK(dp->ip6h_len);
+ ND_TCHECK(dp->ip6h_len);
hbhlen = (int)((dp->ip6h_len + 1) << 3);
- TCHECK2(dp, hbhlen);
- printf("HBH ");
- if (vflag)
- ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
+ ND_TCHECK2(*dp, hbhlen);
+ ND_PRINT((ndo, "HBH "));
+ if (ndo->ndo_vflag)
+ ip6_opt_print(ndo, (const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
return(hbhlen);
trunc:
- fputs("[|HBH]", stdout);
- return(hbhlen);
+ ND_PRINT((ndo, "[|HBH]"));
+ return(-1);
}
int
-dstopt_print(register const u_char *bp)
+dstopt_print(netdissect_options *ndo, register const u_char *bp)
{
- const struct ip6_dest *dp = (struct ip6_dest *)bp;
- register const u_char *ep;
+ const struct ip6_dest *dp = (const struct ip6_dest *)bp;
int dstoptlen = 0;
- /* 'ep' points to the end of avaible data. */
- ep = snapend;
- TCHECK(dp->ip6d_len);
+ ND_TCHECK(dp->ip6d_len);
dstoptlen = (int)((dp->ip6d_len + 1) << 3);
- TCHECK2(dp, dstoptlen);
- printf("DSTOPT ");
- if (vflag) {
- ip6_opt_print((const u_char *)dp + sizeof(*dp),
+ ND_TCHECK2(*dp, dstoptlen);
+ ND_PRINT((ndo, "DSTOPT "));
+ if (ndo->ndo_vflag) {
+ ip6_opt_print(ndo, (const u_char *)dp + sizeof(*dp),
dstoptlen - sizeof(*dp));
}
return(dstoptlen);
trunc:
- fputs("[|DSTOPT]", stdout);
- return(dstoptlen);
+ ND_PRINT((ndo, "[|DSTOPT]"));
+ return(-1);
}
-#endif /* INET6 */
projects / tcpdump / blobdiff