/* * 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 1.8.2.1 2005/04/21 06:51:24 guy 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; #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; }