The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Decode and print Zephyr packets. |
| 3 | * |
| 4 | * http://web.mit.edu/zephyr/doc/protocol |
| 5 | * |
| 6 | * Copyright (c) 2001 Nickolai Zeldovich <kolya@MIT.EDU> |
| 7 | * All rights reserved. |
| 8 | * |
| 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 |
| 20 | * PURPOSE. |
| 21 | */ |
| 22 | |
| 23 | #ifndef lint |
| 24 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 25 | "@(#) $Header: /tcpdump/master/tcpdump/print-zephyr.c,v 1.10 2007-08-09 18:47:27 hannes Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 26 | #endif |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include <tcpdump-stdinc.h> |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | #include <string.h> |
| 36 | #include <stdlib.h> |
| 37 | |
| 38 | #include "interface.h" |
| 39 | |
| 40 | struct z_packet { |
| 41 | char *version; |
| 42 | int numfields; |
| 43 | int kind; |
| 44 | char *uid; |
| 45 | int port; |
| 46 | int auth; |
| 47 | int authlen; |
| 48 | char *authdata; |
| 49 | char *class; |
| 50 | char *inst; |
| 51 | char *opcode; |
| 52 | char *sender; |
| 53 | const char *recipient; |
| 54 | char *format; |
| 55 | int cksum; |
| 56 | int multi; |
| 57 | char *multi_uid; |
| 58 | /* Other fields follow here.. */ |
| 59 | }; |
| 60 | |
| 61 | enum z_packet_type { |
| 62 | Z_PACKET_UNSAFE = 0, |
| 63 | Z_PACKET_UNACKED, |
| 64 | Z_PACKET_ACKED, |
| 65 | Z_PACKET_HMACK, |
| 66 | Z_PACKET_HMCTL, |
| 67 | Z_PACKET_SERVACK, |
| 68 | Z_PACKET_SERVNAK, |
| 69 | Z_PACKET_CLIENTACK, |
| 70 | Z_PACKET_STAT |
| 71 | }; |
| 72 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 73 | static const struct tok z_types[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 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" } |
| 83 | }; |
| 84 | |
| 85 | char z_buf[256]; |
| 86 | |
| 87 | static char * |
| 88 | parse_field(char **pptr, int *len) |
| 89 | { |
| 90 | char *s; |
| 91 | |
| 92 | if (*len <= 0 || !pptr || !*pptr) |
| 93 | return NULL; |
| 94 | if (*pptr > (char *) snapend) |
| 95 | return NULL; |
| 96 | |
| 97 | s = *pptr; |
| 98 | while (*pptr <= (char *) snapend && *len >= 0 && **pptr) { |
| 99 | (*pptr)++; |
| 100 | (*len)--; |
| 101 | } |
| 102 | (*pptr)++; |
| 103 | (*len)--; |
| 104 | if (*len < 0 || *pptr > (char *) snapend) |
| 105 | return NULL; |
| 106 | return s; |
| 107 | } |
| 108 | |
| 109 | static const char * |
| 110 | z_triple(char *class, char *inst, const char *recipient) |
| 111 | { |
| 112 | if (!*recipient) |
| 113 | recipient = "*"; |
| 114 | snprintf(z_buf, sizeof(z_buf), "<%s,%s,%s>", class, inst, recipient); |
| 115 | z_buf[sizeof(z_buf)-1] = '\0'; |
| 116 | return z_buf; |
| 117 | } |
| 118 | |
| 119 | static const char * |
| 120 | str_to_lower(char *string) |
| 121 | { |
| 122 | strncpy(z_buf, string, sizeof(z_buf)); |
| 123 | z_buf[sizeof(z_buf)-1] = '\0'; |
| 124 | |
| 125 | string = z_buf; |
| 126 | while (*string) { |
| 127 | *string = tolower((unsigned char)(*string)); |
| 128 | string++; |
| 129 | } |
| 130 | |
| 131 | return z_buf; |
| 132 | } |
| 133 | |
| 134 | void |
| 135 | zephyr_print(const u_char *cp, int length) |
| 136 | { |
| 137 | struct z_packet z; |
| 138 | char *parse = (char *) cp; |
| 139 | int parselen = length; |
| 140 | char *s; |
| 141 | int lose = 0; |
| 142 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 143 | /* squelch compiler warnings */ |
| 144 | |
| 145 | z.kind = 0; |
| 146 | z.class = 0; |
| 147 | z.inst = 0; |
| 148 | z.opcode = 0; |
| 149 | z.sender = 0; |
| 150 | z.recipient = 0; |
| 151 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 152 | #define PARSE_STRING \ |
| 153 | s = parse_field(&parse, &parselen); \ |
| 154 | if (!s) lose = 1; |
| 155 | |
| 156 | #define PARSE_FIELD_INT(field) \ |
| 157 | PARSE_STRING \ |
| 158 | if (!lose) field = strtol(s, 0, 16); |
| 159 | |
| 160 | #define PARSE_FIELD_STR(field) \ |
| 161 | PARSE_STRING \ |
| 162 | if (!lose) field = s; |
| 163 | |
| 164 | PARSE_FIELD_STR(z.version); |
| 165 | if (lose) return; |
| 166 | if (strncmp(z.version, "ZEPH", 4)) |
| 167 | return; |
| 168 | |
| 169 | PARSE_FIELD_INT(z.numfields); |
| 170 | PARSE_FIELD_INT(z.kind); |
| 171 | PARSE_FIELD_STR(z.uid); |
| 172 | PARSE_FIELD_INT(z.port); |
| 173 | PARSE_FIELD_INT(z.auth); |
| 174 | PARSE_FIELD_INT(z.authlen); |
| 175 | PARSE_FIELD_STR(z.authdata); |
| 176 | PARSE_FIELD_STR(z.class); |
| 177 | PARSE_FIELD_STR(z.inst); |
| 178 | PARSE_FIELD_STR(z.opcode); |
| 179 | PARSE_FIELD_STR(z.sender); |
| 180 | PARSE_FIELD_STR(z.recipient); |
| 181 | PARSE_FIELD_STR(z.format); |
| 182 | PARSE_FIELD_INT(z.cksum); |
| 183 | PARSE_FIELD_INT(z.multi); |
| 184 | PARSE_FIELD_STR(z.multi_uid); |
| 185 | |
| 186 | if (lose) { |
| 187 | printf(" [|zephyr] (%d)", length); |
| 188 | return; |
| 189 | } |
| 190 | |
| 191 | printf(" zephyr"); |
| 192 | if (strncmp(z.version+4, "0.2", 3)) { |
| 193 | printf(" v%s", z.version+4); |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | printf(" %s", tok2str(z_types, "type %d", z.kind)); |
| 198 | if (z.kind == Z_PACKET_SERVACK) { |
| 199 | /* Initialization to silence warnings */ |
| 200 | char *ackdata = NULL; |
| 201 | PARSE_FIELD_STR(ackdata); |
| 202 | if (!lose && strcmp(ackdata, "SENT")) |
| 203 | printf("/%s", str_to_lower(ackdata)); |
| 204 | } |
| 205 | if (*z.sender) printf(" %s", z.sender); |
| 206 | |
| 207 | if (!strcmp(z.class, "USER_LOCATE")) { |
| 208 | if (!strcmp(z.opcode, "USER_HIDE")) |
| 209 | printf(" hide"); |
| 210 | else if (!strcmp(z.opcode, "USER_UNHIDE")) |
| 211 | printf(" unhide"); |
| 212 | else |
| 213 | printf(" locate %s", z.inst); |
| 214 | return; |
| 215 | } |
| 216 | |
| 217 | if (!strcmp(z.class, "ZEPHYR_ADMIN")) { |
| 218 | printf(" zephyr-admin %s", str_to_lower(z.opcode)); |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | if (!strcmp(z.class, "ZEPHYR_CTL")) { |
| 223 | if (!strcmp(z.inst, "CLIENT")) { |
| 224 | if (!strcmp(z.opcode, "SUBSCRIBE") || |
| 225 | !strcmp(z.opcode, "SUBSCRIBE_NODEFS") || |
| 226 | !strcmp(z.opcode, "UNSUBSCRIBE")) { |
| 227 | |
| 228 | printf(" %ssub%s", strcmp(z.opcode, "SUBSCRIBE") ? "un" : "", |
| 229 | strcmp(z.opcode, "SUBSCRIBE_NODEFS") ? "" : |
| 230 | "-nodefs"); |
| 231 | if (z.kind != Z_PACKET_SERVACK) { |
| 232 | /* Initialization to silence warnings */ |
| 233 | char *c = NULL, *i = NULL, *r = NULL; |
| 234 | PARSE_FIELD_STR(c); |
| 235 | PARSE_FIELD_STR(i); |
| 236 | PARSE_FIELD_STR(r); |
| 237 | if (!lose) printf(" %s", z_triple(c, i, r)); |
| 238 | } |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | if (!strcmp(z.opcode, "GIMME")) { |
| 243 | printf(" ret"); |
| 244 | return; |
| 245 | } |
| 246 | |
| 247 | if (!strcmp(z.opcode, "GIMMEDEFS")) { |
| 248 | printf(" gimme-defs"); |
| 249 | return; |
| 250 | } |
| 251 | |
| 252 | if (!strcmp(z.opcode, "CLEARSUB")) { |
| 253 | printf(" clear-subs"); |
| 254 | return; |
| 255 | } |
| 256 | |
| 257 | printf(" %s", str_to_lower(z.opcode)); |
| 258 | return; |
| 259 | } |
| 260 | |
| 261 | if (!strcmp(z.inst, "HM")) { |
| 262 | printf(" %s", str_to_lower(z.opcode)); |
| 263 | return; |
| 264 | } |
| 265 | |
| 266 | if (!strcmp(z.inst, "REALM")) { |
| 267 | if (!strcmp(z.opcode, "ADD_SUBSCRIBE")) |
| 268 | printf(" realm add-subs"); |
| 269 | if (!strcmp(z.opcode, "REQ_SUBSCRIBE")) |
| 270 | printf(" realm req-subs"); |
| 271 | if (!strcmp(z.opcode, "RLM_SUBSCRIBE")) |
| 272 | printf(" realm rlm-sub"); |
| 273 | if (!strcmp(z.opcode, "RLM_UNSUBSCRIBE")) |
| 274 | printf(" realm rlm-unsub"); |
| 275 | return; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | if (!strcmp(z.class, "HM_CTL")) { |
| 280 | printf(" hm_ctl %s", str_to_lower(z.inst)); |
| 281 | printf(" %s", str_to_lower(z.opcode)); |
| 282 | return; |
| 283 | } |
| 284 | |
| 285 | if (!strcmp(z.class, "HM_STAT")) { |
| 286 | if (!strcmp(z.inst, "HMST_CLIENT") && !strcmp(z.opcode, "GIMMESTATS")) { |
| 287 | printf(" get-client-stats"); |
| 288 | return; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | if (!strcmp(z.class, "WG_CTL")) { |
| 293 | printf(" wg_ctl %s", str_to_lower(z.inst)); |
| 294 | printf(" %s", str_to_lower(z.opcode)); |
| 295 | return; |
| 296 | } |
| 297 | |
| 298 | if (!strcmp(z.class, "LOGIN")) { |
| 299 | if (!strcmp(z.opcode, "USER_FLUSH")) { |
| 300 | printf(" flush_locs"); |
| 301 | return; |
| 302 | } |
| 303 | |
| 304 | if (!strcmp(z.opcode, "NONE") || |
| 305 | !strcmp(z.opcode, "OPSTAFF") || |
| 306 | !strcmp(z.opcode, "REALM-VISIBLE") || |
| 307 | !strcmp(z.opcode, "REALM-ANNOUNCED") || |
| 308 | !strcmp(z.opcode, "NET-VISIBLE") || |
| 309 | !strcmp(z.opcode, "NET-ANNOUNCED")) { |
| 310 | printf(" set-exposure %s", str_to_lower(z.opcode)); |
| 311 | return; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | if (!*z.recipient) |
| 316 | z.recipient = "*"; |
| 317 | |
| 318 | printf(" to %s", z_triple(z.class, z.inst, z.recipient)); |
| 319 | if (*z.opcode) |
| 320 | printf(" op %s", z.opcode); |
| 321 | return; |
| 322 | } |