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-rw-r--r--contrib/tcpdump/print-zephyr.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-zephyr.c b/contrib/tcpdump/print-zephyr.c
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+++ b/contrib/tcpdump/print-zephyr.c
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+/*
+ * Decode and print Zephyr packets.
+ *
+ * http://web.mit.edu/zephyr/doc/protocol
+ *
+ * Copyright (c) 2001 Nickolai Zeldovich <kolya@MIT.EDU>
+ * 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 the author(s) 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.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-zephyr.c,v 1.10 2007-08-09 18:47:27 hannes Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "interface.h"
+
+struct z_packet {
+ char *version;
+ int numfields;
+ int kind;
+ char *uid;
+ int port;
+ int auth;
+ int authlen;
+ char *authdata;
+ char *class;
+ char *inst;
+ char *opcode;
+ char *sender;
+ const char *recipient;
+ char *format;
+ int cksum;
+ int multi;
+ char *multi_uid;
+ /* Other fields follow here.. */
+};
+
+enum z_packet_type {
+ Z_PACKET_UNSAFE = 0,
+ Z_PACKET_UNACKED,
+ Z_PACKET_ACKED,
+ Z_PACKET_HMACK,
+ Z_PACKET_HMCTL,
+ Z_PACKET_SERVACK,
+ Z_PACKET_SERVNAK,
+ Z_PACKET_CLIENTACK,
+ Z_PACKET_STAT
+};
+
+static struct tok z_types[] = {
+ { Z_PACKET_UNSAFE, "unsafe" },
+ { Z_PACKET_UNACKED, "unacked" },
+ { Z_PACKET_ACKED, "acked" },
+ { Z_PACKET_HMACK, "hm-ack" },
+ { Z_PACKET_HMCTL, "hm-ctl" },
+ { Z_PACKET_SERVACK, "serv-ack" },
+ { Z_PACKET_SERVNAK, "serv-nak" },
+ { Z_PACKET_CLIENTACK, "client-ack" },
+ { Z_PACKET_STAT, "stat" }
+};
+
+char z_buf[256];
+
+static char *
+parse_field(char **pptr, int *len)
+{
+ char *s;
+
+ if (*len <= 0 || !pptr || !*pptr)
+ return NULL;
+ if (*pptr > (char *) snapend)
+ return NULL;
+
+ s = *pptr;
+ while (*pptr <= (char *) snapend && *len >= 0 && **pptr) {
+ (*pptr)++;
+ (*len)--;
+ }
+ (*pptr)++;
+ (*len)--;
+ if (*len < 0 || *pptr > (char *) snapend)
+ return NULL;
+ return s;
+}
+
+static const char *
+z_triple(char *class, char *inst, const char *recipient)
+{
+ if (!*recipient)
+ recipient = "*";
+ snprintf(z_buf, sizeof(z_buf), "<%s,%s,%s>", class, inst, recipient);
+ z_buf[sizeof(z_buf)-1] = '\0';
+ return z_buf;
+}
+
+static const char *
+str_to_lower(char *string)
+{
+ strncpy(z_buf, string, sizeof(z_buf));
+ z_buf[sizeof(z_buf)-1] = '\0';
+
+ string = z_buf;
+ while (*string) {
+ *string = tolower((unsigned char)(*string));
+ string++;
+ }
+
+ return z_buf;
+}
+
+void
+zephyr_print(const u_char *cp, int length)
+{
+ struct z_packet z;
+ char *parse = (char *) cp;
+ int parselen = length;
+ char *s;
+ int lose = 0;
+
+ /* squelch compiler warnings */
+
+ z.kind = 0;
+ z.class = 0;
+ z.inst = 0;
+ z.opcode = 0;
+ z.sender = 0;
+ z.recipient = 0;
+
+#define PARSE_STRING \
+ s = parse_field(&parse, &parselen); \
+ 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);
+ if (lose) return;
+ 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);
+
+ if (lose) {
+ printf(" [|zephyr] (%d)", length);
+ return;
+ }
+
+ printf(" zephyr");
+ if (strncmp(z.version+4, "0.2", 3)) {
+ printf(" v%s", z.version+4);
+ return;
+ }
+
+ printf(" %s", tok2str(z_types, "type %d", z.kind));
+ if (z.kind == Z_PACKET_SERVACK) {
+ /* Initialization to silence warnings */
+ char *ackdata = NULL;
+ PARSE_FIELD_STR(ackdata);
+ if (!lose && strcmp(ackdata, "SENT"))
+ printf("/%s", str_to_lower(ackdata));
+ }
+ if (*z.sender) printf(" %s", z.sender);
+
+ if (!strcmp(z.class, "USER_LOCATE")) {
+ if (!strcmp(z.opcode, "USER_HIDE"))
+ printf(" hide");
+ else if (!strcmp(z.opcode, "USER_UNHIDE"))
+ printf(" unhide");
+ else
+ printf(" locate %s", z.inst);
+ return;
+ }
+
+ if (!strcmp(z.class, "ZEPHYR_ADMIN")) {
+ printf(" zephyr-admin %s", str_to_lower(z.opcode));
+ 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")) {
+
+ printf(" %ssub%s", strcmp(z.opcode, "SUBSCRIBE") ? "un" : "",
+ strcmp(z.opcode, "SUBSCRIBE_NODEFS") ? "" :
+ "-nodefs");
+ if (z.kind != Z_PACKET_SERVACK) {
+ /* Initialization to silence warnings */
+ char *c = NULL, *i = NULL, *r = NULL;
+ PARSE_FIELD_STR(c);
+ PARSE_FIELD_STR(i);
+ PARSE_FIELD_STR(r);
+ if (!lose) printf(" %s", z_triple(c, i, r));
+ }
+ return;
+ }
+
+ if (!strcmp(z.opcode, "GIMME")) {
+ printf(" ret");
+ return;
+ }
+
+ if (!strcmp(z.opcode, "GIMMEDEFS")) {
+ printf(" gimme-defs");
+ return;
+ }
+
+ if (!strcmp(z.opcode, "CLEARSUB")) {
+ printf(" clear-subs");
+ return;
+ }
+
+ printf(" %s", str_to_lower(z.opcode));
+ return;
+ }
+
+ if (!strcmp(z.inst, "HM")) {
+ printf(" %s", str_to_lower(z.opcode));
+ return;
+ }
+
+ if (!strcmp(z.inst, "REALM")) {
+ if (!strcmp(z.opcode, "ADD_SUBSCRIBE"))
+ printf(" realm add-subs");
+ if (!strcmp(z.opcode, "REQ_SUBSCRIBE"))
+ printf(" realm req-subs");
+ if (!strcmp(z.opcode, "RLM_SUBSCRIBE"))
+ printf(" realm rlm-sub");
+ if (!strcmp(z.opcode, "RLM_UNSUBSCRIBE"))
+ printf(" realm rlm-unsub");
+ return;
+ }
+ }
+
+ if (!strcmp(z.class, "HM_CTL")) {
+ printf(" hm_ctl %s", str_to_lower(z.inst));
+ printf(" %s", str_to_lower(z.opcode));
+ return;
+ }
+
+ if (!strcmp(z.class, "HM_STAT")) {
+ if (!strcmp(z.inst, "HMST_CLIENT") && !strcmp(z.opcode, "GIMMESTATS")) {
+ printf(" get-client-stats");
+ return;
+ }
+ }
+
+ if (!strcmp(z.class, "WG_CTL")) {
+ printf(" wg_ctl %s", str_to_lower(z.inst));
+ printf(" %s", str_to_lower(z.opcode));
+ return;
+ }
+
+ if (!strcmp(z.class, "LOGIN")) {
+ if (!strcmp(z.opcode, "USER_FLUSH")) {
+ printf(" flush_locs");
+ 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")) {
+ printf(" set-exposure %s", str_to_lower(z.opcode));
+ return;
+ }
+ }
+
+ if (!*z.recipient)
+ z.recipient = "*";
+
+ printf(" to %s", z_triple(z.class, z.inst, z.recipient));
+ if (*z.opcode)
+ printf(" op %s", z.opcode);
+ return;
+}
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