/*
* 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.
*/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: IPv6 header option printer */
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.5 2000-04-28 11:14:48 itojun Exp $";
-#endif
+#include <config.h>
-#ifdef INET6
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
+#include "netdissect-stdinc.h"
-#include <netinet/in.h>
-#include <netinet/ip6.h>
-
-#include <stdio.h>
-
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "extract.h"
+
+#include "ip6.h"
-void
-ip6_opt_print(const u_char *bp, int len)
+static int
+ip6_sopt_print(netdissect_options *ndo, const u_char *bp, int len)
{
int i;
int optlen;
for (i = 0; i < len; i += optlen) {
- switch (bp[i]) {
-#ifndef IP6OPT_PAD1
-#define IP6OPT_PAD1 0x00
-#endif
+ if (GET_U_1(bp + i) == IP6OPT_PAD1)
+ optlen = 1;
+ else {
+ if (i + 1 < len)
+ optlen = GET_U_1(bp + i + 1) + 2;
+ else
+ goto trunc;
+ }
+ if (i + optlen > len)
+ goto trunc;
+
+ switch (GET_U_1(bp + i)) {
case IP6OPT_PAD1:
+ ND_PRINT(", pad1");
+ break;
+ case IP6OPT_PADN:
+ if (len - i < IP6OPT_MINLEN) {
+ ND_PRINT(", padn: trunc");
+ goto trunc;
+ }
+ ND_PRINT(", padn");
+ break;
+ default:
+ if (len - i < IP6OPT_MINLEN) {
+ ND_PRINT(", sopt_type %u: trunc)", GET_U_1(bp + i));
+ goto trunc;
+ }
+ ND_PRINT(", sopt_type 0x%02x: len=%u", GET_U_1(bp + i),
+ GET_U_1(bp + i + 1));
+ break;
+ }
+ }
+ return 0;
+
+trunc:
+ return -1;
+}
+
+static int
+ip6_opt_process(netdissect_options *ndo, const u_char *bp, int len,
+ int *found_jumbop, uint32_t *payload_len)
+{
+ int i;
+ int optlen = 0;
+ int found_jumbo = 0;
+ uint32_t jumbolen = 0;
+
+ if (len == 0)
+ return 0;
+ for (i = 0; i < len; i += optlen) {
+ if (GET_U_1(bp + i) == IP6OPT_PAD1)
optlen = 1;
+ else {
+ if (i + 1 < len)
+ optlen = GET_U_1(bp + i + 1) + 2;
+ else
+ goto trunc;
+ }
+ if (i + optlen > len)
+ goto trunc;
+
+ switch (GET_U_1(bp + i)) {
+ case IP6OPT_PAD1:
+ if (ndo->ndo_vflag)
+ ND_PRINT("(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("(padn: trunc)");
goto trunc;
}
- optlen = bp[i + 1] + 2;
+ if (ndo->ndo_vflag)
+ ND_PRINT("(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("(rtalert: trunc)");
goto trunc;
}
- if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
- printf("(rtalert: invalid len %d)", bp[i + 1]);
+ if (GET_U_1(bp + i + 1) != IP6OPT_RTALERT_LEN - 2) {
+ ND_PRINT("(rtalert: invalid len %u)", GET_U_1(bp + i + 1));
goto trunc;
}
- printf("(rtalert: 0x%04x) ", ntohs(*(u_int16_t *)&bp[i + 2]));
- optlen = IP6OPT_RTALERT_LEN;
+ if (ndo->ndo_vflag)
+ ND_PRINT("(rtalert: 0x%04x) ", GET_BE_U_2(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("(jumbo: trunc)");
+ goto trunc;
+ }
+ if (GET_U_1(bp + i + 1) != IP6OPT_JUMBO_LEN - 2) {
+ ND_PRINT("(jumbo: invalid len %u)", GET_U_1(bp + i + 1));
goto trunc;
}
- if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
- printf("(jumbo: invalid len %d)", bp[i + 1]);
+ jumbolen = GET_BE_U_4(bp + i + 2);
+ if (found_jumbo) {
+ /* More than one Jumbo Payload option */
+ if (ndo->ndo_vflag)
+ ND_PRINT("(jumbo: %u - already seen) ", jumbolen);
+ } else {
+ found_jumbo = 1;
+ if (payload_len == NULL) {
+ /* Not a hop-by-hop option - not valid */
+ if (ndo->ndo_vflag)
+ ND_PRINT("(jumbo: %u - not a hop-by-hop option) ", jumbolen);
+ } else if (*payload_len != 0) {
+ /* Payload length was non-zero - not valid */
+ if (ndo->ndo_vflag)
+ ND_PRINT("(jumbo: %u - payload len != 0) ", jumbolen);
+ } else {
+ /*
+ * This is a hop-by-hop option, and Payload length
+ * was zero in the IPv6 header.
+ */
+ if (jumbolen < 65536) {
+ /* Too short */
+ if (ndo->ndo_vflag)
+ ND_PRINT("(jumbo: %u - < 65536) ", jumbolen);
+ } else {
+ /* OK, this is valid */
+ *found_jumbop = 1;
+ *payload_len = jumbolen;
+ if (ndo->ndo_vflag)
+ ND_PRINT("(jumbo: %u) ", jumbolen);
+ }
+ }
+ }
+ break;
+ case IP6OPT_HOME_ADDRESS:
+ if (len - i < IP6OPT_HOMEADDR_MINLEN) {
+ ND_PRINT("(homeaddr: trunc)");
+ goto trunc;
+ }
+ if (GET_U_1(bp + i + 1) < IP6OPT_HOMEADDR_MINLEN - 2) {
+ ND_PRINT("(homeaddr: invalid len %u)", GET_U_1(bp + i + 1));
goto trunc;
}
- printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
- optlen = IP6OPT_JUMBO_LEN;
+ if (ndo->ndo_vflag) {
+ ND_PRINT("(homeaddr: %s", GET_IP6ADDR_STRING(bp + i + 2));
+ if (GET_U_1(bp + i + 1) > IP6OPT_HOMEADDR_MINLEN - 2) {
+ if (ip6_sopt_print(ndo, bp + i + IP6OPT_HOMEADDR_MINLEN,
+ (optlen - IP6OPT_HOMEADDR_MINLEN)) == -1)
+ goto trunc;
+ }
+ ND_PRINT(")");
+ }
break;
default:
if (len - i < IP6OPT_MINLEN) {
- printf("(type %d: trunc)", bp[i]);
+ ND_PRINT("(type %u: trunc)", GET_U_1(bp + i));
goto trunc;
}
- printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
- optlen = bp[i + 1] + 2;
+ if (ndo->ndo_vflag)
+ ND_PRINT("(opt_type 0x%02x: len=%u)", GET_U_1(bp + i),
+ GET_U_1(bp + i + 1));
break;
}
}
-
-#if 0
-end:
-#endif
- return;
+ if (ndo->ndo_vflag)
+ ND_PRINT(" ");
+ return 0;
trunc:
- printf("[trunc] ");
+ return -1;
}
int
-hbhopt_print(register const u_char *bp)
+hbhopt_process(netdissect_options *ndo, const u_char *bp, int *found_jumbo,
+ uint32_t *jumbolen)
{
- 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);
- printf("HBH ");
- if (vflag)
- ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
-
- return(hbhlen);
-
- trunc:
- fputs("[|HBH]", stdout);
- return(hbhlen);
+ const struct ip6_hbh *dp = (const struct ip6_hbh *)bp;
+ u_int hbhlen = 0;
+
+ ndo->ndo_protocol = "hbh";
+ hbhlen = (GET_U_1(dp->ip6h_len) + 1) << 3;
+ ND_TCHECK_LEN(dp, hbhlen);
+ nd_print_protocol_caps(ndo);
+ ND_PRINT(" ");
+ if (ip6_opt_process(ndo, (const u_char *)dp + sizeof(*dp),
+ hbhlen - sizeof(*dp), found_jumbo, jumbolen) == -1)
+ goto trunc;
+ return hbhlen;
+
+trunc:
+ nd_print_trunc(ndo);
+ return -1;
}
int
-dstopt_print(register const u_char *bp)
+dstopt_process(netdissect_options *ndo, 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);
- printf("DSTOPT ");
- if (vflag) {
- ip6_opt_print((const u_char *)dp + sizeof(*dp),
- dstoptlen - sizeof(*dp));
+ const struct ip6_dest *dp = (const struct ip6_dest *)bp;
+ u_int dstoptlen = 0;
+
+ ndo->ndo_protocol = "dstopt";
+ dstoptlen = (GET_U_1(dp->ip6d_len) + 1) << 3;
+ ND_TCHECK_LEN(dp, dstoptlen);
+ nd_print_protocol_caps(ndo);
+ ND_PRINT(" ");
+ if (ndo->ndo_vflag) {
+ /*
+ * The Jumbo Payload option is a hop-by-hop option; we don't
+ * honor Jumbo Payload destination options, reporting them
+ * as invalid.
+ */
+ if (ip6_opt_process(ndo, (const u_char *)dp + sizeof(*dp),
+ dstoptlen - sizeof(*dp), NULL, NULL) == -1)
+ goto trunc;
}
- return(dstoptlen);
+ return dstoptlen;
- trunc:
- fputs("[|DSTOPT]", stdout);
- return(dstoptlen);
+trunc:
+ nd_print_trunc(ndo);
+ return -1;
}
-#endif /* INET6 */
projects / tcpdump / blobdiff