+/*
+ * Copyright (C) 2002 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:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 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
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef lint
+static const char rcsid[] =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.1 2002-06-27 08:22:41 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 <stdio.h>
+
+#include "ip6.h"
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h" /* must come after interface.h */
+
+/* Mobility header */
+struct ip6_mobility {
+ u_int8_t ip6m_pproto; /* following payload protocol (for PG) */
+ u_int8_t ip6m_len; /* length in units of 8 octets */
+ u_int16_t ip6m_type; /* message type */
+ u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
+ union {
+ u_int16_t ip6m_un_data16[1]; /* type-specific field */
+ u_int8_t ip6m_un_data8[2]; /* type-specific fiedl */
+ } ip6m_dataun;
+};
+
+#define ip6m_data16 ip6m_dataun.ip6m_un_data16
+#define ip6m_data8 ip6m_dataun.ip6m_un_data8
+
+#define IP6M_MINLEN 8
+
+/* message type */
+#if BYTE_ORDER == BIG_ENDIAN
+#define IP6M_BINDING_REQUEST 0x0000 /* Binding Refresh Request */
+#define IP6M_HOME_TEST_INIT 0x0001 /* Home Test Init */
+#define IP6M_CAREOF_TEST_INIT 0x0002 /* Care-of Test Init */
+#define IP6M_HOME_TEST 0x0003 /* Home Test */
+#define IP6M_CAREOF_TEST 0x0004 /* Care-of Test */
+#define IP6M_BINDING_UPDATE 0x0005 /* Binding Update */
+#define IP6M_BINDING_ACK 0x0006 /* Binding Acknowledgement */
+#define IP6M_BINDING_ERROR 0x0007 /* Binding Error */
+#else /* BYTE_ORDER == LITTLE_ENDIAN */
+#define IP6M_BINDING_REQUEST 0x0000 /* Binding Refresh Request */
+#define IP6M_HOME_TEST_INIT 0x0100 /* Home Test Init */
+#define IP6M_CAREOF_TEST_INIT 0x0200 /* Care-of Test Init */
+#define IP6M_HOME_TEST 0x0300 /* Home Test */
+#define IP6M_CAREOF_TEST 0x0400 /* Care-of Test */
+#define IP6M_BINDING_UPDATE 0x0500 /* Binding Update */
+#define IP6M_BINDING_ACK 0x0600 /* Binding Acknowledgement */
+#define IP6M_BINDING_ERROR 0x0700 /* Binding Error */
+#endif /* BYTE_ORDER == LITTLE_ENDIAN */
+
+/* Mobility Header Options */
+#define IP6MOPT_MINLEN 2
+#define IP6MOPT_PAD1 0x0
+#define IP6MOPT_PADN 0x1
+#define IP6MOPT_UI 0x2
+#define IP6MOPT_UI_MINLEN 4
+#define IP6MOPT_ALTCOA 0x3
+#define IP6MOPT_ALTCOA_MINLEN 18
+#define IP6MOPT_NONCEID 0x4
+#define IP6MOPT_NONCEID_MINLEN 6
+#define IP6MOPT_AUTH 0x5
+#define IP6MOPT_AUTH_MINLEN 2 /* 2+len */
+
+void
+mobility_opt_print(const u_char *bp, int len)
+{
+ int i;
+ int optlen;
+
+ for (i = 0; i < len; i += optlen) {
+ if (bp[i] == IP6MOPT_PAD1)
+ optlen = 1;
+ else {
+ if (i + 1 < len)
+ optlen = bp[i + 1];
+ else
+ goto trunc;
+ if (optlen < IP6MOPT_MINLEN)
+ optlen = IP6MOPT_MINLEN; /* XXX */
+ }
+ if (i + optlen > len)
+ goto trunc;
+
+ switch (bp[i]) {
+ case IP6MOPT_PAD1:
+ printf("(pad1)");
+ break;
+ case IP6MOPT_PADN:
+ if (len - i < IP6MOPT_MINLEN) {
+ printf("(padn: trunc)");
+ goto trunc;
+ }
+ printf("(padn)");
+ break;
+ case IP6MOPT_UI:
+ if (len - i < IP6MOPT_UI_MINLEN) {
+ printf("(ui: trunc)");
+ goto trunc;
+ }
+ printf("(ui: 0x%04x)", ntohs(*(u_int16_t *)&bp[i + 2]));
+ break;
+ case IP6MOPT_ALTCOA:
+ if (len - i < IP6MOPT_ALTCOA_MINLEN) {
+ printf("(altcoa: trunc)");
+ goto trunc;
+ }
+ printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2]));
+ break;
+ case IP6MOPT_NONCEID:
+ if (len - i < IP6MOPT_NONCEID_MINLEN) {
+ printf("(ni: trunc)");
+ goto trunc;
+ }
+ printf("(ni: ho=0x%04x ci=0x%04x)",
+ ntohs(*(u_int16_t *)&bp[i + 2]),
+ ntohs(*(u_int16_t *)&bp[i + 4]));
+ break;
+ case IP6MOPT_AUTH:
+ if (len - i < IP6MOPT_AUTH_MINLEN) {
+ printf("(auth: trunc)");
+ goto trunc;
+ }
+ printf("(auth spi: 0x%08x)",
+ (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
+ break;
+ default:
+ if (len - i < IP6MOPT_MINLEN) {
+ printf("(sopt_type %d: trunc)", bp[i]);
+ goto trunc;
+ }
+ printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]);
+ break;
+ }
+ }
+ return;
+
+trunc:
+ printf("[trunc] ");
+}
+
+/*
+ * Mobility Header
+ */
+int
+mobility_print(const u_char *bp, const u_char *bp2)
+{
+ const struct ip6_mobility *mh;
+ const struct ip6_hdr *ip6;
+ const u_char *ep;
+ int mhlen, hlen;
+
+ mh = (struct ip6_mobility *)bp;
+ ip6 = (struct ip6_hdr *)bp2;
+
+ /* 'ep' points to the end of available data. */
+ ep = snapend;
+
+ TCHECK(mh->ip6m_len);
+ mhlen = (int)(mh->ip6m_len << 3);
+ if (mhlen < IP6M_MINLEN)
+ mhlen = IP6M_MINLEN; /* XXX */
+
+ /* XXX ip6m_cksum */
+
+ TCHECK(mh->ip6m_type);
+ switch (mh->ip6m_type) {
+ case IP6M_BINDING_REQUEST:
+ printf("mobility: BRR");
+ hlen = IP6M_MINLEN;
+ break;
+ case IP6M_HOME_TEST_INIT:
+ case IP6M_CAREOF_TEST_INIT:
+ printf("mobility: %soTI",
+ mh->ip6m_type == IP6M_HOME_TEST_INIT ? "H" : "C");
+ hlen = IP6M_MINLEN;
+ TCHECK2(*mh, hlen + 4);
+ printf(" cookie=0x%x", ntohl(*(u_int32_t *)&bp[hlen]));
+ hlen += 4;
+ break;
+ case IP6M_HOME_TEST:
+ case IP6M_CAREOF_TEST:
+ printf("mobility: %soT",
+ mh->ip6m_type == IP6M_HOME_TEST ? "H" : "C");
+ hlen = IP6M_MINLEN;
+ TCHECK2(*mh, hlen + 2);
+ printf(" nonce id=0x%x", ntohs(*(u_int16_t *)&bp[hlen]));
+ hlen += 2;
+ /* Reserved (16bits) */
+ hlen += 2;
+ TCHECK2(*mh, hlen + 4);
+ printf(" mobile cookie=0x%x", ntohl(*(u_int32_t *)&bp[hlen]));
+ hlen += 4;
+ /* Home(Care-of) Cookie (128 bits) */
+ hlen += 16;
+ break;
+ case IP6M_BINDING_UPDATE:
+ printf("mobility: BU");
+ TCHECK(mh->ip6m_data8[0]);
+ if (mh->ip6m_data8[0] & 0xf0)
+ printf(" ");
+ if (mh->ip6m_data8[0] & 0x80)
+ printf("A");
+ if (mh->ip6m_data8[0] & 0x40)
+ printf("H");
+ if (mh->ip6m_data8[0] & 0x20)
+ printf("S");
+ if (mh->ip6m_data8[0] & 0x10)
+ printf("D");
+ hlen = IP6M_MINLEN;
+ TCHECK2(*mh, hlen + 2);
+ printf(" seq#=%d", ntohs(*(u_int16_t *)&bp[hlen]));
+ hlen += 2;
+ /* Reserved (16bits) */
+ hlen += 2;
+ TCHECK2(*mh, hlen + 4);
+ printf(" lifetime=%d", ntohl(*(u_int32_t *)&bp[hlen]));
+ hlen += 4;
+ TCHECK2(*mh, hlen + 16);
+ printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
+ hlen += 16;
+ break;
+ case IP6M_BINDING_ACK:
+ printf("mobility: BA");
+ TCHECK(mh->ip6m_data8[0]);
+ printf(" status=%d", mh->ip6m_data8[0]);
+ hlen = IP6M_MINLEN;
+ TCHECK2(*mh, hlen + 2);
+ printf(" seq#=%d", ntohs(*(u_int16_t *)&bp[hlen]));
+ hlen += 2;
+ /* Reserved (16bits) */
+ hlen += 2;
+ TCHECK2(*mh, hlen + 4);
+ printf(" lifetime=%d", ntohl(*(u_int32_t *)&bp[hlen]));
+ hlen += 4;
+ TCHECK2(*mh, hlen + 4);
+ printf(" refresh=%d", ntohl(*(u_int32_t *)&bp[hlen]));
+ hlen += 4;
+ break;
+ case IP6M_BINDING_ERROR:
+ printf("mobility: BE");
+ TCHECK(mh->ip6m_data8[0]);
+ printf(" status=%d", mh->ip6m_data8[0]);
+ hlen = IP6M_MINLEN;
+ TCHECK2(*mh, hlen + 16);
+ printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
+ hlen += 16;
+ break;
+ default:
+ printf("mobility: type-#%d len=%d", ntohs(mh->ip6m_type),
+ mh->ip6m_len);
+ return(mhlen);
+ break;
+ }
+ if (vflag)
+ mobility_opt_print(&bp[hlen], mhlen - hlen);
+
+ return(mhlen);
+
+ trunc:
+ fputs("[|MOBILITY]", stdout);
+ return(mhlen);
+}
+#endif /* INET6 */
projects / tcpdump / commitdiff
