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/*
* 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.
*/
#include <unistd.h>
#include <stdlib.h>
#include <argus_compat.h>
#include <rabins.h>
#include <argus_util.h>
#include <argus_client.h>
#include <argus_main.h>
#include <argus_filter.h>
#include <signal.h>
#include <ctype.h>
#include <argus/extract.h>
extern u_char *snapend;
#include "interface.h"
extern char ArgusBuf[];
#define MSDP_TYPE_MAX 7
char *
msdp_print(const unsigned char *sp, u_int length)
{
unsigned int type, len;
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 */
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," msdp:");
while (length > 0) {
TCHECK2(*sp, 3);
type = *sp;
len = EXTRACT_16BITS(sp + 1);
if (len > 1400 || ArgusParser->vflag)
sprintf(&ArgusBuf[strlen(ArgusBuf)]," [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)
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," SA");
else
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," SA-Response");
TCHECK(*sp);
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," %u entries", *sp);
if ((u_int)((*sp * 12) + 8) < len) {
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," [w/data]");
if (ArgusParser->vflag > 1) {
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," ");
/*
ip_print(gndo, sp + *sp * 12 + 8 - 3,
len - (*sp * 12 + 8));
*/
}
}
break;
case 2:
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," SA-Request");
TCHECK2(*sp, 5);
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," for %s", ipaddr_string(sp + 1));
break;
case 4:
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," Keepalive");
if (len != 3)
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)],"[len=%d] ", len);
break;
case 5:
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," Notification");
break;
default:
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," [type=%d len=%d]", type, len);
break;
}
sp += (len - 3);
length -= (len - 3);
}
return ArgusBuf;
trunc:
(void)sprintf(&ArgusBuf[strlen(ArgusBuf)]," [|msdp]");
return ArgusBuf;
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/
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