2 * Decode and print Zephyr packets.
4 * https://web.mit.edu/zephyr/doc/protocol
6 * Copyright (c) 2001 Nickolai Zeldovich <kolya@MIT.EDU>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that: (1) source code
11 * distributions retain the above copyright notice and this paragraph
12 * in its entirety, and (2) distributions including binary code include
13 * the above copyright notice and this paragraph in its entirety in
14 * the documentation or other materials provided with the distribution.
15 * The name of the author(s) may not be used to endorse or promote
16 * products derived from this software without specific prior written
17 * permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 /* \summary: Zephyr printer */
29 #include "netdissect-stdinc.h"
35 #include "netdissect-ctype.h"
37 #include "netdissect.h"
53 const char *recipient;
57 const char *multi_uid;
58 /* Other fields follow here.. */
73 static const struct tok z_types[] = {
74 { Z_PACKET_UNSAFE, "unsafe" },
75 { Z_PACKET_UNACKED, "unacked" },
76 { Z_PACKET_ACKED, "acked" },
77 { Z_PACKET_HMACK, "hm-ack" },
78 { Z_PACKET_HMCTL, "hm-ctl" },
79 { Z_PACKET_SERVACK, "serv-ack" },
80 { Z_PACKET_SERVNAK, "serv-nak" },
81 { Z_PACKET_CLIENTACK, "client-ack" },
82 { Z_PACKET_STAT, "stat" },
86 static char z_buf[256];
89 parse_field(netdissect_options *ndo, const char **pptr, int *len)
95 /* Scan for the NUL terminator */
98 /* Ran out of packet data without finding it */
101 if (GET_U_1(*pptr) == '\0') {
109 /* Skip the NUL terminator */
116 z_triple(const char *class, const char *inst, const char *recipient)
120 snprintf(z_buf, sizeof(z_buf), "<%s,%s,%s>", class, inst, recipient);
121 z_buf[sizeof(z_buf)-1] = '\0';
126 str_to_lower(const char *string)
130 strncpy(z_buf, string, sizeof(z_buf));
131 z_buf[sizeof(z_buf)-1] = '\0';
135 *zb_string = ND_ASCII_TOLOWER(*zb_string);
142 #define ZEPHYR_PRINT(str1,str2) \
143 { ND_PRINT("%s", (str1)); fn_print_str(ndo, (const u_char *)(str2)); }
146 zephyr_print(netdissect_options *ndo, const u_char *cp, u_int length)
148 struct z_packet z = {
161 NULL, /* recipient */
167 const char *parse = (const char *) cp;
168 int parselen = length;
172 ndo->ndo_protocol = "zephyr";
173 /* squelch compiler warnings */
175 #define PARSE_STRING \
176 s = parse_field(ndo, &parse, &parselen); \
179 #define PARSE_FIELD_INT(field) \
181 if (!lose) field = strtol(s, 0, 16);
183 #define PARSE_FIELD_STR(field) \
185 if (!lose) field = s;
187 PARSE_FIELD_STR(z.version);
191 if (strncmp(z.version, "ZEPH", 4))
194 PARSE_FIELD_INT(z.numfields);
195 PARSE_FIELD_INT(z.kind);
196 PARSE_FIELD_STR(z.uid);
197 PARSE_FIELD_INT(z.port);
198 PARSE_FIELD_INT(z.auth);
199 PARSE_FIELD_INT(z.authlen);
200 PARSE_FIELD_STR(z.authdata);
201 PARSE_FIELD_STR(z.class);
202 PARSE_FIELD_STR(z.inst);
203 PARSE_FIELD_STR(z.opcode);
204 PARSE_FIELD_STR(z.sender);
205 PARSE_FIELD_STR(z.recipient);
206 PARSE_FIELD_STR(z.format);
207 PARSE_FIELD_INT(z.cksum);
208 PARSE_FIELD_INT(z.multi);
209 PARSE_FIELD_STR(z.multi_uid);
215 if (strncmp(z.version+4, "0.2", 3)) {
216 ZEPHYR_PRINT(" v", z.version+4)
220 ND_PRINT(" %s", tok2str(z_types, "type %d", z.kind));
221 if (z.kind == Z_PACKET_SERVACK) {
222 /* Initialization to silence warnings */
223 const char *ackdata = NULL;
224 PARSE_FIELD_STR(ackdata);
225 if (!lose && strcmp(ackdata, "SENT"))
226 ZEPHYR_PRINT("/", str_to_lower(ackdata))
228 if (*z.sender) ZEPHYR_PRINT(" ", z.sender);
230 if (!strcmp(z.class, "USER_LOCATE")) {
231 if (!strcmp(z.opcode, "USER_HIDE"))
233 else if (!strcmp(z.opcode, "USER_UNHIDE"))
236 ZEPHYR_PRINT(" locate ", z.inst);
240 if (!strcmp(z.class, "ZEPHYR_ADMIN")) {
241 ZEPHYR_PRINT(" zephyr-admin ", str_to_lower(z.opcode));
245 if (!strcmp(z.class, "ZEPHYR_CTL")) {
246 if (!strcmp(z.inst, "CLIENT")) {
247 if (!strcmp(z.opcode, "SUBSCRIBE") ||
248 !strcmp(z.opcode, "SUBSCRIBE_NODEFS") ||
249 !strcmp(z.opcode, "UNSUBSCRIBE")) {
251 ND_PRINT(" %ssub%s", strcmp(z.opcode, "SUBSCRIBE") ? "un" : "",
252 strcmp(z.opcode, "SUBSCRIBE_NODEFS") ? "" :
254 if (z.kind != Z_PACKET_SERVACK) {
255 /* Initialization to silence warnings */
256 const char *c = NULL, *i = NULL, *r = NULL;
260 if (!lose) ZEPHYR_PRINT(" ", z_triple(c, i, r));
265 if (!strcmp(z.opcode, "GIMME")) {
270 if (!strcmp(z.opcode, "GIMMEDEFS")) {
271 ND_PRINT(" gimme-defs");
275 if (!strcmp(z.opcode, "CLEARSUB")) {
276 ND_PRINT(" clear-subs");
280 ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
284 if (!strcmp(z.inst, "HM")) {
285 ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
289 if (!strcmp(z.inst, "REALM")) {
290 if (!strcmp(z.opcode, "ADD_SUBSCRIBE"))
291 ND_PRINT(" realm add-subs");
292 if (!strcmp(z.opcode, "REQ_SUBSCRIBE"))
293 ND_PRINT(" realm req-subs");
294 if (!strcmp(z.opcode, "RLM_SUBSCRIBE"))
295 ND_PRINT(" realm rlm-sub");
296 if (!strcmp(z.opcode, "RLM_UNSUBSCRIBE"))
297 ND_PRINT(" realm rlm-unsub");
302 if (!strcmp(z.class, "HM_CTL")) {
303 ZEPHYR_PRINT(" hm_ctl ", str_to_lower(z.inst));
304 ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
308 if (!strcmp(z.class, "HM_STAT")) {
309 if (!strcmp(z.inst, "HMST_CLIENT") && !strcmp(z.opcode, "GIMMESTATS")) {
310 ND_PRINT(" get-client-stats");
315 if (!strcmp(z.class, "WG_CTL")) {
316 ZEPHYR_PRINT(" wg_ctl ", str_to_lower(z.inst));
317 ZEPHYR_PRINT(" ", str_to_lower(z.opcode));
321 if (!strcmp(z.class, "LOGIN")) {
322 if (!strcmp(z.opcode, "USER_FLUSH")) {
323 ND_PRINT(" flush_locs");
327 if (!strcmp(z.opcode, "NONE") ||
328 !strcmp(z.opcode, "OPSTAFF") ||
329 !strcmp(z.opcode, "REALM-VISIBLE") ||
330 !strcmp(z.opcode, "REALM-ANNOUNCED") ||
331 !strcmp(z.opcode, "NET-VISIBLE") ||
332 !strcmp(z.opcode, "NET-ANNOUNCED")) {
333 ZEPHYR_PRINT(" set-exposure ", str_to_lower(z.opcode));
341 ZEPHYR_PRINT(" to ", z_triple(z.class, z.inst, z.recipient));
343 ZEPHYR_PRINT(" op ", z.opcode);
347 nd_print_invalid(ndo);