103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2001 William C. Fenner.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code
|
|
* distributions retain the above copyright notice and this paragraph
|
|
* in its entirety, and (2) distributions including binary code include
|
|
* the above copyright notice and this paragraph in its entirety in
|
|
* the documentation or other materials provided with the distribution.
|
|
* The name of William C. Fenner may not be used to endorse or
|
|
* promote products derived from this software without specific prior
|
|
* written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND
|
|
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
|
|
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#define NETDISSECT_REWORKED
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
|
|
#define MSDP_TYPE_MAX 7
|
|
|
|
void
|
|
msdp_print(netdissect_options *ndo, const u_char *sp, u_int length)
|
|
{
|
|
unsigned int type, len;
|
|
|
|
ND_TCHECK2(*sp, 3);
|
|
/* See if we think we're at the beginning of a compound packet */
|
|
type = *sp;
|
|
len = EXTRACT_16BITS(sp + 1);
|
|
if (len > 1500 || len < 3 || type == 0 || type > MSDP_TYPE_MAX)
|
|
goto trunc; /* not really truncated, but still not decodable */
|
|
ND_PRINT((ndo, " msdp:"));
|
|
while (length > 0) {
|
|
ND_TCHECK2(*sp, 3);
|
|
type = *sp;
|
|
len = EXTRACT_16BITS(sp + 1);
|
|
if (len > 1400 || ndo->ndo_vflag)
|
|
ND_PRINT((ndo, " [len %u]", len));
|
|
if (len < 3)
|
|
goto trunc;
|
|
sp += 3;
|
|
length -= 3;
|
|
switch (type) {
|
|
case 1: /* IPv4 Source-Active */
|
|
case 3: /* IPv4 Source-Active Response */
|
|
if (type == 1)
|
|
ND_PRINT((ndo, " SA"));
|
|
else
|
|
ND_PRINT((ndo, " SA-Response"));
|
|
ND_TCHECK(*sp);
|
|
ND_PRINT((ndo, " %u entries", *sp));
|
|
if ((u_int)((*sp * 12) + 8) < len) {
|
|
ND_PRINT((ndo, " [w/data]"));
|
|
if (ndo->ndo_vflag > 1) {
|
|
ND_PRINT((ndo, " "));
|
|
ip_print(ndo, sp + *sp * 12 + 8 - 3,
|
|
len - (*sp * 12 + 8));
|
|
}
|
|
}
|
|
break;
|
|
case 2:
|
|
ND_PRINT((ndo, " SA-Request"));
|
|
ND_TCHECK2(*sp, 5);
|
|
ND_PRINT((ndo, " for %s", ipaddr_string(ndo, sp + 1)));
|
|
break;
|
|
case 4:
|
|
ND_PRINT((ndo, " Keepalive"));
|
|
if (len != 3)
|
|
ND_PRINT((ndo, "[len=%d] ", len));
|
|
break;
|
|
case 5:
|
|
ND_PRINT((ndo, " Notification"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " [type=%d len=%d]", type, len));
|
|
break;
|
|
}
|
|
sp += (len - 3);
|
|
length -= (len - 3);
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, " [|msdp]"));
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|