/*
* 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 1.8 2000-12-13 07:57:05 itojun 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 <stdio.h>
+#include <netdissect-stdinc.h>
-#include "ip6.h"
-
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "extract.h"
-/* 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_ALTCOA 0x4
-#define IP6SOPT_ALTCOA_MINLEN 18
-#define IP6SOPT_UI 0x2
-#define IP6SOPT_UI_MINLEN 4
-
-static void ip6_sopt_print(const u_char *, int);
+#include "ip6.h"
static void
-ip6_sopt_print(const u_char *bp, int len)
+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]) {
case IP6OPT_PAD1:
- printf(", pad1");
- optlen = 1;
+ ND_PRINT((ndo, ", pad1"));
break;
case IP6OPT_PADN:
if (len - i < IP6OPT_MINLEN) {
- printf(", padn: trunc");
+ ND_PRINT((ndo, ", padn: trunc"));
goto trunc;
}
- printf(", padn");
- optlen = bp[i + 1] + 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]));
- optlen = bp[i + 1] + 2;
- break;
- case IP6SOPT_UI:
- if (len - i < IP6SOPT_UI_MINLEN) {
- printf(", ui: trunc");
- goto trunc;
- }
- printf("(ui: 0x%04x) ", ntohs(*(u_int16_t *)&bp[i + 2]));
- optlen = bp[i + 1] + 2;
+ ND_PRINT((ndo, ", padn"));
break;
default:
if (len - i < IP6OPT_MINLEN) {
- printf(", sopt_type %d: trunc)", bp[i]);
+ ND_PRINT((ndo, ", sopt_type %d: trunc)", bp[i]));
goto trunc;
}
- printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
- optlen = bp[i + 1] + 2;
+ ND_PRINT((ndo, ", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]));
break;
}
}
return;
trunc:
- printf("[trunc] ");
+ ND_PRINT((ndo, "[trunc] "));
}
-void
-ip6_opt_print(const u_char *bp, int len)
+static void
+ip6_opt_print(netdissect_options *ndo, const u_char *bp, int len)
{
int i;
- int optlen;
+ 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:
- printf("(pad1)");
- optlen = 1;
+ ND_PRINT((ndo, "(pad1)"));
break;
case IP6OPT_PADN:
if (len - i < IP6OPT_MINLEN) {
- printf("(padn: trunc)");
+ ND_PRINT((ndo, "(padn: trunc)"));
goto trunc;
}
- printf("(padn)");
- optlen = bp[i + 1] + 2;
+ ND_PRINT((ndo, "(padn)"));
break;
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_int16_t *)&bp[i + 2]));
- optlen = IP6OPT_RTALERT_LEN;
+ ND_PRINT((ndo, "(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2])));
break;
case IP6OPT_JUMBO:
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_int32_t *)&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) {
- printf("(homeaddr: trunc)");
+ ND_PRINT((ndo, "(homeaddr: trunc)"));
goto trunc;
}
if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
- printf("(homeaddr: invalid len %d)", bp[i + 1]);
+ ND_PRINT((ndo, "(homeaddr: invalid len %d)", bp[i + 1]));
goto trunc;
}
- printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
+ ND_PRINT((ndo, "(homeaddr: %s", ip6addr_string(ndo, &bp[i + 2])));
if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
- ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
- (optlen-IP6OPT_HOMEADDR_MINLEN));
+ ip6_sopt_print(ndo, &bp[i + IP6OPT_HOMEADDR_MINLEN],
+ (optlen - IP6OPT_HOMEADDR_MINLEN));
}
- printf(")");
- optlen = bp[i + 1] + 2;
- 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("R");
- if (bp[i + 2] & 0x10)
- printf("D");
- if (bp[i + 2] & 0x0f)
- printf("res");
- printf(", prefixlen: %u", bp[i + 3]);
- printf(", sequence: %u",
- (u_int16_t)ntohs(*(u_int16_t *)&bp[i + 4]));
- printf(", lifetime: %u",
- (u_int32_t)ntohs(*(u_int32_t *)&bp[i + 8]));
-
- optlen = bp[i + 1] + 2;
- 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]);
- printf(", sequence: %u",
- (u_int16_t)ntohs(*(u_int16_t *)&bp[i + 3]));
- printf(", lifetime: %u",
- (u_int32_t)ntohs(*(u_int32_t *)&bp[i + 7]));
- printf(", refresh: %u",
- (u_int32_t)ntohs(*(u_int32_t *)&bp[i + 11]));
-
- if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
- ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
- (optlen-IP6OPT_BA_MINLEN));
- }
- printf(")");
- optlen = bp[i + 1] + 2;
- 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(")");
- optlen = bp[i + 1] + 2;
+ 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("(opt_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 available 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 available 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