2002-06-21 00:43:23 +00:00
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/*
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* Decode and print Zephyr packets.
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*
|
2023-05-10 15:02:34 +00:00
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* https://web.mit.edu/zephyr/doc/protocol
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2005-07-11 03:54:22 +00:00
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*
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2002-06-21 00:43:23 +00:00
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* Copyright (c) 2001 Nickolai Zeldovich <kolya@MIT.EDU>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* The name of the author(s) may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE.
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*/
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2017-01-31 19:17:06 +00:00
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/* \summary: Zephyr printer */
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|
2002-06-21 00:43:23 +00:00
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|
#ifdef HAVE_CONFIG_H
|
2023-05-10 15:02:34 +00:00
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|
#include <config.h>
|
2002-06-21 00:43:23 +00:00
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#endif
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|
2023-05-10 15:02:34 +00:00
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|
|
#include "netdissect-stdinc.h"
|
2004-03-31 09:17:26 +00:00
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|
|
2002-06-21 00:43:23 +00:00
|
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|
#include <stdio.h>
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|
|
#include <string.h>
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|
|
#include <stdlib.h>
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|
|
2023-05-10 15:02:34 +00:00
|
|
|
#include "netdissect-ctype.h"
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|
|
2017-01-31 19:17:06 +00:00
|
|
|
#include "netdissect.h"
|
2023-05-10 15:02:34 +00:00
|
|
|
#include "extract.h"
|
2002-06-21 00:43:23 +00:00
|
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|
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struct z_packet {
|
2017-01-31 19:17:06 +00:00
|
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const char *version;
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2002-06-21 00:43:23 +00:00
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|
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int numfields;
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|
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int kind;
|
2017-01-31 19:17:06 +00:00
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const char *uid;
|
2002-06-21 00:43:23 +00:00
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|
int port;
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|
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int auth;
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int authlen;
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2017-01-31 19:17:06 +00:00
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|
|
const char *authdata;
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const char *class;
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const char *inst;
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|
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const char *opcode;
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|
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const char *sender;
|
2004-03-31 09:17:26 +00:00
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|
|
const char *recipient;
|
2017-01-31 19:17:06 +00:00
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|
|
const char *format;
|
2002-06-21 00:43:23 +00:00
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|
|
int cksum;
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|
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int multi;
|
2017-01-31 19:17:06 +00:00
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|
|
const char *multi_uid;
|
2002-06-21 00:43:23 +00:00
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|
/* Other fields follow here.. */
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|
|
};
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|
2003-03-02 08:22:26 +00:00
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|
|
enum z_packet_type {
|
2002-06-21 00:43:23 +00:00
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|
Z_PACKET_UNSAFE = 0,
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Z_PACKET_UNACKED,
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Z_PACKET_ACKED,
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Z_PACKET_HMACK,
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Z_PACKET_HMCTL,
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Z_PACKET_SERVACK,
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Z_PACKET_SERVNAK,
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Z_PACKET_CLIENTACK,
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Z_PACKET_STAT
|
2003-03-02 08:22:26 +00:00
|
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};
|
2002-06-21 00:43:23 +00:00
|
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|
2015-01-06 19:03:11 +00:00
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static const struct tok z_types[] = {
|
2002-06-21 00:43:23 +00:00
|
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|
{ Z_PACKET_UNSAFE, "unsafe" },
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|
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{ Z_PACKET_UNACKED, "unacked" },
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|
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{ Z_PACKET_ACKED, "acked" },
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|
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{ Z_PACKET_HMACK, "hm-ack" },
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|
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{ Z_PACKET_HMCTL, "hm-ctl" },
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{ Z_PACKET_SERVACK, "serv-ack" },
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|
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{ Z_PACKET_SERVNAK, "serv-nak" },
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|
|
{ Z_PACKET_CLIENTACK, "client-ack" },
|
2017-09-18 04:10:54 +00:00
|
|
|
{ Z_PACKET_STAT, "stat" },
|
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|
|
{ 0, NULL }
|
2002-06-21 00:43:23 +00:00
|
|
|
};
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|
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|
2015-01-06 19:03:11 +00:00
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|
static char z_buf[256];
|
2002-06-21 00:43:23 +00:00
|
|
|
|
2017-01-31 19:17:06 +00:00
|
|
|
static const char *
|
2023-05-10 15:02:34 +00:00
|
|
|
parse_field(netdissect_options *ndo, const char **pptr, int *len)
|
2002-06-21 00:43:23 +00:00
|
|
|
{
|
2017-01-31 19:17:06 +00:00
|
|
|
const char *s;
|
2002-06-21 00:43:23 +00:00
|
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|
|
2017-09-18 04:10:54 +00:00
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|
|
/* Start of string */
|
2002-06-21 00:43:23 +00:00
|
|
|
s = *pptr;
|
2017-09-18 04:10:54 +00:00
|
|
|
/* Scan for the NUL terminator */
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|
|
for (;;) {
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|
|
|
if (*len == 0) {
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|
|
/* Ran out of packet data without finding it */
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|
|
return NULL;
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|
|
|
}
|
2023-05-10 15:02:34 +00:00
|
|
|
if (GET_U_1(*pptr) == '\0') {
|
2017-09-18 04:10:54 +00:00
|
|
|
/* Found it */
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|
|
break;
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|
|
|
}
|
|
|
|
/* Keep scanning */
|
2002-06-21 00:43:23 +00:00
|
|
|
(*pptr)++;
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|
|
(*len)--;
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|
|
|
}
|
2017-09-18 04:10:54 +00:00
|
|
|
/* Skip the NUL terminator */
|
2002-06-21 00:43:23 +00:00
|
|
|
(*pptr)++;
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|
|
(*len)--;
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|
|
return s;
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|
|
}
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|
|
static const char *
|
2017-01-31 19:17:06 +00:00
|
|
|
z_triple(const char *class, const char *inst, const char *recipient)
|
2002-06-21 00:43:23 +00:00
|
|
|
{
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|
|
|
if (!*recipient)
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|
|
recipient = "*";
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|
|
snprintf(z_buf, sizeof(z_buf), "<%s,%s,%s>", class, inst, recipient);
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|
|
z_buf[sizeof(z_buf)-1] = '\0';
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|
|
return z_buf;
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|
|
|
}
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|
|
|
|
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|
|
static const char *
|
2017-01-31 19:17:06 +00:00
|
|
|
str_to_lower(const char *string)
|
2002-06-21 00:43:23 +00:00
|
|
|
{
|
2017-01-31 19:17:06 +00:00
|
|
|
char *zb_string;
|
|
|
|
|
2002-06-21 00:43:23 +00:00
|
|
|
strncpy(z_buf, string, sizeof(z_buf));
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|
|
z_buf[sizeof(z_buf)-1] = '\0';
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|
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|
2017-01-31 19:17:06 +00:00
|
|
|
zb_string = z_buf;
|
|
|
|
while (*zb_string) {
|
2023-05-10 15:02:34 +00:00
|
|
|
*zb_string = ND_ASCII_TOLOWER(*zb_string);
|
2017-01-31 19:17:06 +00:00
|
|
|
zb_string++;
|
2002-06-21 00:43:23 +00:00
|
|
|
}
|
|
|
|
|
|
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|
return z_buf;
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|
|
|
}
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|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
#define ZEPHYR_PRINT(str1,str2) \
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|
|
{ ND_PRINT("%s", (str1)); fn_print_str(ndo, (const u_char *)(str2)); }
|
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|
|
2002-06-21 00:43:23 +00:00
|
|
|
void
|
2023-05-10 15:02:34 +00:00
|
|
|
zephyr_print(netdissect_options *ndo, const u_char *cp, u_int length)
|
2002-06-21 00:43:23 +00:00
|
|
|
{
|
2023-05-10 15:02:34 +00:00
|
|
|
struct z_packet z = {
|
|
|
|
NULL, /* version */
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|
|
0, /* numfields */
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|
|
|
0, /* kind */
|
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|
|
NULL, /* uid */
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|
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0, /* port */
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|
|
0, /* auth */
|
|
|
|
0, /* authlen */
|
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|
|
NULL, /* authdata */
|
|
|
|
NULL, /* class */
|
|
|
|
NULL, /* inst */
|
|
|
|
NULL, /* opcode */
|
|
|
|
NULL, /* sender */
|
|
|
|
NULL, /* recipient */
|
|
|
|
NULL, /* format */
|
|
|
|
0, /* cksum */
|
|
|
|
0, /* multi */
|
|
|
|
NULL /* multi_uid */
|
|
|
|
};
|
2017-01-31 19:17:06 +00:00
|
|
|
const char *parse = (const char *) cp;
|
2002-06-21 00:43:23 +00:00
|
|
|
int parselen = length;
|
2017-01-31 19:17:06 +00:00
|
|
|
const char *s;
|
2002-06-21 00:43:23 +00:00
|
|
|
int lose = 0;
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ndo->ndo_protocol = "zephyr";
|
2009-03-21 16:23:46 +00:00
|
|
|
/* squelch compiler warnings */
|
|
|
|
|
2017-09-18 04:10:54 +00:00
|
|
|
#define PARSE_STRING \
|
2023-05-10 15:02:34 +00:00
|
|
|
s = parse_field(ndo, &parse, &parselen); \
|
2002-06-21 00:43:23 +00:00
|
|
|
if (!s) lose = 1;
|
|
|
|
|
|
|
|
#define PARSE_FIELD_INT(field) \
|
|
|
|
PARSE_STRING \
|
|
|
|
if (!lose) field = strtol(s, 0, 16);
|
|
|
|
|
|
|
|
#define PARSE_FIELD_STR(field) \
|
|
|
|
PARSE_STRING \
|
|
|
|
if (!lose) field = s;
|
|
|
|
|
|
|
|
PARSE_FIELD_STR(z.version);
|
2023-05-10 15:02:34 +00:00
|
|
|
if (lose)
|
|
|
|
goto invalid;
|
|
|
|
|
2002-06-21 00:43:23 +00:00
|
|
|
if (strncmp(z.version, "ZEPH", 4))
|
|
|
|
return;
|
|
|
|
|
|
|
|
PARSE_FIELD_INT(z.numfields);
|
|
|
|
PARSE_FIELD_INT(z.kind);
|
|
|
|
PARSE_FIELD_STR(z.uid);
|
|
|
|
PARSE_FIELD_INT(z.port);
|
|
|
|
PARSE_FIELD_INT(z.auth);
|
|
|
|
PARSE_FIELD_INT(z.authlen);
|
|
|
|
PARSE_FIELD_STR(z.authdata);
|
|
|
|
PARSE_FIELD_STR(z.class);
|
|
|
|
PARSE_FIELD_STR(z.inst);
|
|
|
|
PARSE_FIELD_STR(z.opcode);
|
|
|
|
PARSE_FIELD_STR(z.sender);
|
|
|
|
PARSE_FIELD_STR(z.recipient);
|
|
|
|
PARSE_FIELD_STR(z.format);
|
|
|
|
PARSE_FIELD_INT(z.cksum);
|
|
|
|
PARSE_FIELD_INT(z.multi);
|
|
|
|
PARSE_FIELD_STR(z.multi_uid);
|
|
|
|
|
2017-09-18 04:10:54 +00:00
|
|
|
if (lose)
|
2023-05-10 15:02:34 +00:00
|
|
|
goto invalid;
|
2002-06-21 00:43:23 +00:00
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" zephyr");
|
2002-06-21 00:43:23 +00:00
|
|
|
if (strncmp(z.version+4, "0.2", 3)) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" v", z.version+4)
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" %s", tok2str(z_types, "type %d", z.kind));
|
2002-06-21 00:43:23 +00:00
|
|
|
if (z.kind == Z_PACKET_SERVACK) {
|
|
|
|
/* Initialization to silence warnings */
|
2017-01-31 19:17:06 +00:00
|
|
|
const char *ackdata = NULL;
|
2002-06-21 00:43:23 +00:00
|
|
|
PARSE_FIELD_STR(ackdata);
|
|
|
|
if (!lose && strcmp(ackdata, "SENT"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT("/", str_to_lower(ackdata))
|
2002-06-21 00:43:23 +00:00
|
|
|
}
|
2023-05-10 15:02:34 +00:00
|
|
|
if (*z.sender) ZEPHYR_PRINT(" ", z.sender);
|
2002-06-21 00:43:23 +00:00
|
|
|
|
|
|
|
if (!strcmp(z.class, "USER_LOCATE")) {
|
|
|
|
if (!strcmp(z.opcode, "USER_HIDE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" hide");
|
2002-06-21 00:43:23 +00:00
|
|
|
else if (!strcmp(z.opcode, "USER_UNHIDE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" unhide");
|
2002-06-21 00:43:23 +00:00
|
|
|
else
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" locate ", z.inst);
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "ZEPHYR_ADMIN")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" zephyr-admin ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "ZEPHYR_CTL")) {
|
|
|
|
if (!strcmp(z.inst, "CLIENT")) {
|
|
|
|
if (!strcmp(z.opcode, "SUBSCRIBE") ||
|
|
|
|
!strcmp(z.opcode, "SUBSCRIBE_NODEFS") ||
|
|
|
|
!strcmp(z.opcode, "UNSUBSCRIBE")) {
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" %ssub%s", strcmp(z.opcode, "SUBSCRIBE") ? "un" : "",
|
2002-06-21 00:43:23 +00:00
|
|
|
strcmp(z.opcode, "SUBSCRIBE_NODEFS") ? "" :
|
2023-05-10 15:02:34 +00:00
|
|
|
"-nodefs");
|
2002-06-21 00:43:23 +00:00
|
|
|
if (z.kind != Z_PACKET_SERVACK) {
|
|
|
|
/* Initialization to silence warnings */
|
2017-01-31 19:17:06 +00:00
|
|
|
const char *c = NULL, *i = NULL, *r = NULL;
|
2002-06-21 00:43:23 +00:00
|
|
|
PARSE_FIELD_STR(c);
|
|
|
|
PARSE_FIELD_STR(i);
|
|
|
|
PARSE_FIELD_STR(r);
|
2023-05-10 15:02:34 +00:00
|
|
|
if (!lose) ZEPHYR_PRINT(" ", z_triple(c, i, r));
|
2002-06-21 00:43:23 +00:00
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.opcode, "GIMME")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" ret");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.opcode, "GIMMEDEFS")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" gimme-defs");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.opcode, "CLEARSUB")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" clear-subs");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.inst, "HM")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.inst, "REALM")) {
|
|
|
|
if (!strcmp(z.opcode, "ADD_SUBSCRIBE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" realm add-subs");
|
2002-06-21 00:43:23 +00:00
|
|
|
if (!strcmp(z.opcode, "REQ_SUBSCRIBE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" realm req-subs");
|
2002-06-21 00:43:23 +00:00
|
|
|
if (!strcmp(z.opcode, "RLM_SUBSCRIBE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" realm rlm-sub");
|
2002-06-21 00:43:23 +00:00
|
|
|
if (!strcmp(z.opcode, "RLM_UNSUBSCRIBE"))
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" realm rlm-unsub");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "HM_CTL")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" hm_ctl ", str_to_lower(z.inst));
|
|
|
|
ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "HM_STAT")) {
|
|
|
|
if (!strcmp(z.inst, "HMST_CLIENT") && !strcmp(z.opcode, "GIMMESTATS")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" get-client-stats");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "WG_CTL")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" wg_ctl ", str_to_lower(z.inst));
|
|
|
|
ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.class, "LOGIN")) {
|
|
|
|
if (!strcmp(z.opcode, "USER_FLUSH")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ND_PRINT(" flush_locs");
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(z.opcode, "NONE") ||
|
|
|
|
!strcmp(z.opcode, "OPSTAFF") ||
|
|
|
|
!strcmp(z.opcode, "REALM-VISIBLE") ||
|
|
|
|
!strcmp(z.opcode, "REALM-ANNOUNCED") ||
|
|
|
|
!strcmp(z.opcode, "NET-VISIBLE") ||
|
|
|
|
!strcmp(z.opcode, "NET-ANNOUNCED")) {
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" set-exposure ", str_to_lower(z.opcode));
|
2002-06-21 00:43:23 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!*z.recipient)
|
|
|
|
z.recipient = "*";
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" to ", z_triple(z.class, z.inst, z.recipient));
|
2002-06-21 00:43:23 +00:00
|
|
|
if (*z.opcode)
|
2023-05-10 15:02:34 +00:00
|
|
|
ZEPHYR_PRINT(" op ", z.opcode);
|
2017-09-18 04:10:54 +00:00
|
|
|
return;
|
|
|
|
|
2023-05-10 15:02:34 +00:00
|
|
|
invalid:
|
|
|
|
nd_print_invalid(ndo);
|
2002-06-21 00:43:23 +00:00
|
|
|
}
|