* SUCH DAMAGE.
*/
+/* \summary: IPv6 mobility printer */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.12 2005-04-20 22:21:00 guy Exp $";
-#endif
-
-#ifdef INET6
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
+#include <netdissect-stdinc.h>
#include "ip6.h"
-
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "extract.h" /* must come after interface.h */
+#include "extract.h"
+
+static const char tstr[] = "[|MOBILITY]";
/* 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_int8_t ip6m_type; /* message type */
- u_int8_t reserved; /* reserved */
- u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
+ uint8_t ip6m_pproto; /* following payload protocol (for PG) */
+ uint8_t ip6m_len; /* length in units of 8 octets */
+ uint8_t ip6m_type; /* message type */
+ uint8_t reserved; /* reserved */
+ uint16_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 */
+ uint16_t ip6m_un_data16[1]; /* type-specific field */
+ uint8_t ip6m_un_data8[2]; /* type-specific field */
} ip6m_dataun;
};
#define IP6M_MINLEN 8
+/* http://www.iana.org/assignments/mobility-parameters/mobility-parameters.xhtml */
+
/* message type */
#define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */
#define IP6M_HOME_TEST_INIT 1 /* Home Test Init */
#define IP6M_BINDING_UPDATE 5 /* Binding Update */
#define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */
#define IP6M_BINDING_ERROR 7 /* Binding Error */
+#define IP6M_MAX 7
+
+static const struct tok ip6m_str[] = {
+ { IP6M_BINDING_REQUEST, "BRR" },
+ { IP6M_HOME_TEST_INIT, "HoTI" },
+ { IP6M_CAREOF_TEST_INIT, "CoTI" },
+ { IP6M_HOME_TEST, "HoT" },
+ { IP6M_CAREOF_TEST, "CoT" },
+ { IP6M_BINDING_UPDATE, "BU" },
+ { IP6M_BINDING_ACK, "BA" },
+ { IP6M_BINDING_ERROR, "BE" },
+ { 0, NULL }
+};
+
+static const unsigned ip6m_hdrlen[IP6M_MAX + 1] = {
+ IP6M_MINLEN, /* IP6M_BINDING_REQUEST */
+ IP6M_MINLEN + 8, /* IP6M_HOME_TEST_INIT */
+ IP6M_MINLEN + 8, /* IP6M_CAREOF_TEST_INIT */
+ IP6M_MINLEN + 16, /* IP6M_HOME_TEST */
+ IP6M_MINLEN + 16, /* IP6M_CAREOF_TEST */
+ IP6M_MINLEN + 4, /* IP6M_BINDING_UPDATE */
+ IP6M_MINLEN + 4, /* IP6M_BINDING_ACK */
+ IP6M_MINLEN + 16, /* IP6M_BINDING_ERROR */
+};
/* Mobility Header Options */
#define IP6MOPT_MINLEN 2
#define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */
#define IP6MOPT_AUTH_MINLEN 12
-static void
-mobility_opt_print(const u_char *bp, const unsigned len)
+static int
+mobility_opt_print(netdissect_options *ndo,
+ const u_char *bp, const unsigned len)
{
unsigned i, optlen;
for (i = 0; i < len; i += optlen) {
+ ND_TCHECK(bp[i]);
if (bp[i] == IP6MOPT_PAD1)
optlen = 1;
else {
- if (i + 1 < len)
+ if (i + 1 < len) {
+ ND_TCHECK(bp[i + 1]);
optlen = bp[i + 1] + 2;
+ }
else
goto trunc;
}
if (i + optlen > len)
goto trunc;
+ ND_TCHECK(bp[i + optlen]);
switch (bp[i]) {
case IP6MOPT_PAD1:
- printf("(pad1)");
+ ND_PRINT((ndo, "(pad1)"));
break;
case IP6MOPT_PADN:
if (len - i < IP6MOPT_MINLEN) {
- printf("(padn: trunc)");
+ ND_PRINT((ndo, "(padn: trunc)"));
goto trunc;
}
- printf("(padn)");
+ ND_PRINT((ndo, "(padn)"));
break;
case IP6MOPT_REFRESH:
if (len - i < IP6MOPT_REFRESH_MINLEN) {
- printf("(refresh: trunc)");
+ ND_PRINT((ndo, "(refresh: trunc)"));
goto trunc;
}
/* units of 4 secs */
- printf("(refresh: %u)",
- EXTRACT_16BITS(&bp[i+2]) << 2);
+ ND_PRINT((ndo, "(refresh: %u)",
+ EXTRACT_16BITS(&bp[i+2]) << 2));
break;
case IP6MOPT_ALTCOA:
if (len - i < IP6MOPT_ALTCOA_MINLEN) {
- printf("(altcoa: trunc)");
+ ND_PRINT((ndo, "(altcoa: trunc)"));
goto trunc;
}
- printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2]));
+ ND_PRINT((ndo, "(alt-CoA: %s)", ip6addr_string(ndo, &bp[i+2])));
break;
case IP6MOPT_NONCEID:
if (len - i < IP6MOPT_NONCEID_MINLEN) {
- printf("(ni: trunc)");
+ ND_PRINT((ndo, "(ni: trunc)"));
goto trunc;
}
- printf("(ni: ho=0x%04x co=0x%04x)",
+ ND_PRINT((ndo, "(ni: ho=0x%04x co=0x%04x)",
EXTRACT_16BITS(&bp[i+2]),
- EXTRACT_16BITS(&bp[i+4]));
+ EXTRACT_16BITS(&bp[i+4])));
break;
case IP6MOPT_AUTH:
if (len - i < IP6MOPT_AUTH_MINLEN) {
- printf("(auth: trunc)");
+ ND_PRINT((ndo, "(auth: trunc)"));
goto trunc;
}
- printf("(auth)");
+ ND_PRINT((ndo, "(auth)"));
break;
default:
if (len - i < IP6MOPT_MINLEN) {
- printf("(sopt_type %u: trunc)", bp[i]);
+ ND_PRINT((ndo, "(sopt_type %u: trunc)", bp[i]));
goto trunc;
}
- printf("(type-0x%02x: len=%u)", bp[i], bp[i + 1]);
+ ND_PRINT((ndo, "(type-0x%02x: len=%u)", bp[i], bp[i + 1]));
break;
}
}
- return;
+ return 0;
trunc:
- printf("[trunc] ");
+ return 1;
}
/*
* Mobility Header
*/
int
-mobility_print(const u_char *bp, const u_char *bp2 _U_)
+mobility_print(netdissect_options *ndo,
+ const u_char *bp, const u_char *bp2 _U_)
{
const struct ip6_mobility *mh;
const u_char *ep;
unsigned mhlen, hlen;
- u_int8_t type;
+ uint8_t type;
- mh = (struct ip6_mobility *)bp;
+ mh = (const struct ip6_mobility *)bp;
/* 'ep' points to the end of available data. */
- ep = snapend;
+ ep = ndo->ndo_snapend;
- if (!TTEST(mh->ip6m_len)) {
+ if (!ND_TTEST(mh->ip6m_len)) {
/*
* There's not enough captured data to include the
* mobility header length.
/* XXX ip6m_cksum */
- TCHECK(mh->ip6m_type);
+ ND_TCHECK(mh->ip6m_type);
type = mh->ip6m_type;
+ if (type <= IP6M_MAX && mhlen < ip6m_hdrlen[type]) {
+ ND_PRINT((ndo, "(header length %u is too small for type %u)", mhlen, type));
+ goto trunc;
+ }
+ ND_PRINT((ndo, "mobility: %s", tok2str(ip6m_str, "type-#%u", type)));
switch (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",
- type == IP6M_HOME_TEST_INIT ? "H" : "C");
hlen = IP6M_MINLEN;
- if (vflag) {
- TCHECK2(*mh, hlen + 8);
- printf(" %s Init Cookie=%08x:%08x",
+ if (ndo->ndo_vflag) {
+ ND_TCHECK2(*mh, hlen + 8);
+ ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
EXTRACT_32BITS(&bp[hlen]),
- EXTRACT_32BITS(&bp[hlen + 4]));
+ EXTRACT_32BITS(&bp[hlen + 4])));
}
hlen += 8;
break;
case IP6M_HOME_TEST:
case IP6M_CAREOF_TEST:
- printf("mobility: %soT",
- type == IP6M_HOME_TEST ? "H" : "C");
- TCHECK(mh->ip6m_data16[0]);
- printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0]));
+ ND_TCHECK(mh->ip6m_data16[0]);
+ ND_PRINT((ndo, " nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0])));
hlen = IP6M_MINLEN;
- if (vflag) {
- TCHECK2(*mh, hlen + 8);
- printf(" %s Init Cookie=%08x:%08x",
+ if (ndo->ndo_vflag) {
+ ND_TCHECK2(*mh, hlen + 8);
+ ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
type == IP6M_HOME_TEST ? "Home" : "Care-of",
EXTRACT_32BITS(&bp[hlen]),
- EXTRACT_32BITS(&bp[hlen + 4]));
+ EXTRACT_32BITS(&bp[hlen + 4])));
}
hlen += 8;
- if (vflag) {
- TCHECK2(*mh, hlen + 8);
- printf(" %s Keygen Token=%08x:%08x",
+ if (ndo->ndo_vflag) {
+ ND_TCHECK2(*mh, hlen + 8);
+ ND_PRINT((ndo, " %s Keygen Token=%08x:%08x",
type == IP6M_HOME_TEST ? "Home" : "Care-of",
EXTRACT_32BITS(&bp[hlen]),
- EXTRACT_32BITS(&bp[hlen + 4]));
+ EXTRACT_32BITS(&bp[hlen + 4])));
}
hlen += 8;
break;
case IP6M_BINDING_UPDATE:
- printf("mobility: BU");
- TCHECK(mh->ip6m_data16[0]);
- printf(" seq#=%u", EXTRACT_16BITS(&mh->ip6m_data16[0]));
+ ND_TCHECK(mh->ip6m_data16[0]);
+ ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&mh->ip6m_data16[0])));
hlen = IP6M_MINLEN;
- TCHECK2(*mh, hlen + 1);
+ ND_TCHECK2(*mh, hlen + 1);
if (bp[hlen] & 0xf0)
- printf(" ");
+ ND_PRINT((ndo, " "));
if (bp[hlen] & 0x80)
- printf("A");
+ ND_PRINT((ndo, "A"));
if (bp[hlen] & 0x40)
- printf("H");
+ ND_PRINT((ndo, "H"));
if (bp[hlen] & 0x20)
- printf("L");
+ ND_PRINT((ndo, "L"));
if (bp[hlen] & 0x10)
- printf("K");
+ ND_PRINT((ndo, "K"));
/* Reserved (4bits) */
hlen += 1;
/* Reserved (8bits) */
hlen += 1;
- TCHECK2(*mh, hlen + 2);
+ ND_TCHECK2(*mh, hlen + 2);
/* units of 4 secs */
- printf(" lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2);
+ ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
hlen += 2;
break;
case IP6M_BINDING_ACK:
- printf("mobility: BA");
- TCHECK(mh->ip6m_data8[0]);
- printf(" status=%u", mh->ip6m_data8[0]);
+ ND_TCHECK(mh->ip6m_data8[0]);
+ ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
if (mh->ip6m_data8[1] & 0x80)
- printf(" K");
+ ND_PRINT((ndo, " K"));
/* Reserved (7bits) */
hlen = IP6M_MINLEN;
- TCHECK2(*mh, hlen + 2);
- printf(" seq#=%u", EXTRACT_16BITS(&bp[hlen]));
+ ND_TCHECK2(*mh, hlen + 2);
+ ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&bp[hlen])));
hlen += 2;
- TCHECK2(*mh, hlen + 2);
+ ND_TCHECK2(*mh, hlen + 2);
/* units of 4 secs */
- printf(" lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2);
+ ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
hlen += 2;
break;
case IP6M_BINDING_ERROR:
- printf("mobility: BE");
- TCHECK(mh->ip6m_data8[0]);
- printf(" status=%u", mh->ip6m_data8[0]);
+ ND_TCHECK(mh->ip6m_data8[0]);
+ ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
/* Reserved */
hlen = IP6M_MINLEN;
- TCHECK2(*mh, hlen + 16);
- printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
+ ND_TCHECK2(*mh, hlen + 16);
+ ND_PRINT((ndo, " homeaddr %s", ip6addr_string(ndo, &bp[hlen])));
hlen += 16;
break;
default:
- printf("mobility: type-#%u len=%u", type, mh->ip6m_len);
+ ND_PRINT((ndo, " len=%u", mh->ip6m_len));
return(mhlen);
break;
}
- if (vflag)
- mobility_opt_print(&bp[hlen], mhlen - hlen);
+ if (ndo->ndo_vflag)
+ if (mobility_opt_print(ndo, &bp[hlen], mhlen - hlen))
+ goto trunc;;
return(mhlen);
trunc:
- fputs("[|MOBILITY]", stdout);
+ ND_PRINT((ndo, "%s", tstr));
return(mhlen);
}
-#endif /* INET6 */
projects / tcpdump / blobdiff