src/log_targets.h

   1 /*
   2  *  uAnytun
   3  *
   4  *  uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
   5  *  featured implementation uAnytun has no support for multiple connections
   6  *  or synchronisation. It is a small single threaded implementation intended
   7  *  to act as a client on small platforms.
   8  *  The secure anycast tunneling protocol (satp) defines a protocol used
   9  *  for communication between any combination of unicast and anycast
  10  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
  11  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
  12  *  ethernet, ip, arp ...). satp directly includes cryptography and
  13  *  message authentication based on the methodes used by SRTP.  It is
  14  *  intended to deliver a generic, scaleable and secure solution for
  15  *  tunneling and relaying of packets of any protocol.
  16  *
  17  *
  18  *  Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org>
  19  *
  20  *  This file is part of uAnytun.
  21  *
  22  *  uAnytun is free software: you can redistribute it and/or modify
  23  *  it under the terms of the GNU General Public License as published by
  24  *  the Free Software Foundation, either version 3 of the License, or
  25  *  any later version.
  26  *
  27  *  uAnytun is distributed in the hope that it will be useful,
  28  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  *  GNU General Public License for more details.
  31  *
  32  *  You should have received a copy of the GNU General Public License
  33  *  along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
  34  */
  35
  36 #ifndef UANYTUN_log_targets_h_INCLUDED
  37 #define UANYTUN_log_targets_h_INCLUDED
  38
  39 #include <time.h>
  40
  41 static char* get_time_formatted()
  42 {
  43   char* time_string;
  44   time_t t = time(NULL);
  45   if(t < 0)
  46     time_string = "<time read error>";
  47   else {
  48     time_string = ctime(&t);
  49     if(!time_string)
  50       time_string = "<time format error>";
  51     else {
  52       char* newline = strchr(time_string, '\n');
  53       if(newline)
  54         newline[0] = 0;
  55     }
  56   }
  57   return time_string;
  58 }
  59
  60 enum syslog_facility_enum { USER = LOG_USER, MAIL = LOG_MAIL,
  61                             DAEMON = LOG_DAEMON, AUTH = LOG_AUTH,
  62                             SYSLOG = LOG_SYSLOG, LPR = LOG_LPR,
  63                             NEWS = LOG_NEWS, UUCP = LOG_UUCP,
  64                             CRON = LOG_CRON, AUTHPRIV = LOG_AUTHPRIV,
  65                             FTP = LOG_FTP, LOCAL0 = LOG_LOCAL0,
  66                             LOCAL1 = LOG_LOCAL1, LOCAL2 = LOG_LOCAL2,
  67                             LOCAL3 = LOG_LOCAL3, LOCAL4 = LOG_LOCAL4,
  68                             LOCAL5 = LOG_LOCAL5, LOCAL6 = LOG_LOCAL6,
  69                             LOCAL7 = LOG_LOCAL7 };
  70 typedef enum syslog_facility_enum syslog_facility_t;
  71
  72 struct log_target_syslog_param_struct {
  73   char* logname_;
  74   syslog_facility_t facility_;
  75 };
  76 typedef struct log_target_syslog_param_struct log_target_syslog_param_t;
  77
  78 int log_target_syslog_init(log_target_t* self, const char* conf)
  79 {
  80   if(!self || (conf && conf[0] == 0))
  81     return -1;
  82
  83   self->param_ = malloc(sizeof(log_target_syslog_param_t));
  84   if(!self->param_)
  85     return -2;
  86
  87   char* logname;
  88   const char* end = NULL;
  89   if(!conf)
  90     logname = strdup("uanytun");
  91   else {
  92     end = strchr(conf, ',');
  93     if(end) {
  94       size_t len = (size_t)(end - conf);
  95       if(!len) {
  96         free(self->param_);
  97         return -1;
  98       }
  99       logname = malloc(len+1);
 100       if(logname) {
 101         strncpy(logname, conf, len);
 102         logname[len] = 0;
 103       }
 104     }
 105     else
 106       logname = strdup(conf);
 107   }
 108
 109   if(!logname) {
 110     free(self->param_);
 111     return -2;
 112   }
 113   ((log_target_syslog_param_t*)(self->param_))->logname_ = logname;
 114
 115   if(!end) {
 116     ((log_target_syslog_param_t*)(self->param_))->facility_ = DAEMON;
 117     return 0;
 118   }
 119
 120   if(end[1] == 0 || end[1] == ',') {
 121     free(logname);
 122     free(self->param_);
 123     return -1;
 124   }
 125
 126   const char* start = end + 1;
 127   end = strchr(start, ',');
 128   int i;
 129   for(i=0;;++i) {
 130     if(facilitynames[i].c_name == NULL) {
 131       free(logname);
 132       free(self->param_);
 133       return -1;
 134     }
 135
 136     if(( end && !strncmp(start, facilitynames[i].c_name, (size_t)(end - start)) && facilitynames[i].c_name[(size_t)(end-start)] == 0) ||
 137        (!end && !strcmp(start, facilitynames[i].c_name))) {
 138         ((log_target_syslog_param_t*)(self->param_))->facility_ = facilitynames[i].c_val;
 139         break;
 140     }
 141   }
 142
 143   return 0;
 144 }
 145
 146 void log_target_syslog_open(log_target_t* self)
 147 {
 148   if(!self || !self->param_)
 149     return;
 150
 151   openlog(((log_target_syslog_param_t*)(self->param_))->logname_, LOG_PID, ((log_target_syslog_param_t*)(self->param_))->facility_);
 152   self->opened_ = 1;
 153 }
 154
 155 void log_target_syslog_log(log_target_t* self, log_prio_t prio, const char* msg)
 156 {
 157   if(!self || !self->param_ || !self->opened_)
 158     return;
 159
 160   syslog((prio + 2) | ((log_target_syslog_param_t*)(self->param_))->facility_, "%s", msg);
 161 }
 162
 163 void log_target_syslog_close(log_target_t* self)
 164 {
 165   closelog();
 166   self->opened_ = 0;
 167 }
 168
 169 void log_target_syslog_clear(log_target_t* self)
 170 {
 171   if(!self || !self->param_)
 172     return;
 173
 174   if(((log_target_syslog_param_t*)(self->param_))->logname_)
 175     free(((log_target_syslog_param_t*)(self->param_))->logname_);
 176
 177   free(self->param_);
 178 }
 179
 180 log_target_t* log_target_syslog_new()
 181 {
 182   log_target_t* tmp = malloc(sizeof(log_target_t));
 183   if(!tmp)
 184     return NULL;
 185
 186   tmp->type_ = TARGET_SYSLOG;
 187   tmp->init = &log_target_syslog_init;
 188   tmp->open = &log_target_syslog_open;
 189   tmp->log = &log_target_syslog_log;
 190   tmp->close = &log_target_syslog_close;
 191   tmp->clear = &log_target_syslog_clear;
 192   tmp->opened_ = 0;
 193   tmp->enabled_ = 0;
 194   tmp->max_prio_ = NOTICE;
 195   tmp->param_ = NULL;
 196   tmp->next_ = NULL;
 197
 198   return tmp;
 199 }
 200
 201
 202 struct log_target_file_param_struct {
 203   char* logfilename_;
 204   FILE* file_;
 205 };
 206 typedef struct log_target_file_param_struct log_target_file_param_t;
 207
 208 int log_target_file_init(log_target_t* self, const char* conf)
 209 {
 210   if(!self || (conf && conf[0] == 0))
 211     return -1;
 212
 213   self->param_ = malloc(sizeof(log_target_file_param_t));
 214   if(!self->param_)
 215     return -2;
 216
 217   char* logfilename;
 218   if(!conf)
 219     logfilename = strdup("uanytun.log");
 220   else {
 221     const char* end = strchr(conf, ',');
 222     if(end) {
 223       size_t len = (size_t)(end - conf);
 224       if(!len) {
 225         free(self->param_);
 226         return -1;
 227       }
 228       logfilename = malloc(len+1);
 229       if(logfilename) {
 230         strncpy(logfilename, conf, len);
 231         logfilename[len] = 0;
 232       }
 233     }
 234     else
 235       logfilename = strdup(conf);
 236   }
 237
 238   if(!logfilename) {
 239     free(self->param_);
 240     return -2;
 241   }
 242   ((log_target_file_param_t*)(self->param_))->logfilename_ = logfilename;
 243   ((log_target_file_param_t*)(self->param_))->file_ = NULL;
 244
 245   return 0;
 246 }
 247
 248 void log_target_file_open(log_target_t* self)
 249 {
 250   if(!self || !self->param_)
 251     return;
 252
 253   ((log_target_file_param_t*)(self->param_))->file_ = fopen(((log_target_file_param_t*)(self->param_))->logfilename_, "w");
 254   if(((log_target_file_param_t*)(self->param_))->file_)
 255     self->opened_ = 1;
 256 }
 257
 258 void log_target_file_log(log_target_t* self, log_prio_t prio, const char* msg)
 259 {
 260   if(!self || !self->param_ || !self->opened_)
 261     return;
 262
 263   fprintf(((log_target_file_param_t*)(self->param_))->file_, "%s %s: %s\n", get_time_formatted(), log_prio_to_string(prio), msg);
 264   fflush(((log_target_file_param_t*)(self->param_))->file_);
 265 }
 266
 267 void log_target_file_close(log_target_t* self)
 268 {
 269   if(!self || !self->param_)
 270     return;
 271
 272   fclose(((log_target_file_param_t*)(self->param_))->file_);
 273   self->opened_ = 0;
 274 }
 275
 276 void log_target_file_clear(log_target_t* self)
 277 {
 278   if(!self || !self->param_)
 279     return;
 280
 281   if(((log_target_file_param_t*)(self->param_))->logfilename_)
 282     free(((log_target_file_param_t*)(self->param_))->logfilename_);
 283
 284   free(self->param_);
 285 }
 286
 287
 288 log_target_t* log_target_file_new()
 289 {
 290   log_target_t* tmp = malloc(sizeof(log_target_t));
 291   if(!tmp)
 292     return NULL;
 293
 294   tmp->type_ = TARGET_FILE;
 295   tmp->init = &log_target_file_init;
 296   tmp->open = &log_target_file_open;
 297   tmp->log = &log_target_file_log;
 298   tmp->close = &log_target_file_close;
 299   tmp->clear = &log_target_file_clear;
 300   tmp->opened_ = 0;
 301   tmp->enabled_ = 0;
 302   tmp->max_prio_ = NOTICE;
 303   tmp->param_ = NULL;
 304   tmp->next_ = NULL;
 305
 306   return tmp;
 307 }
 308
 309
 310 void log_target_stdout_log(log_target_t* self, log_prio_t prio, const char* msg)
 311 {
 312   printf("%s %s: %s\n", get_time_formatted(), log_prio_to_string(prio), msg);
 313 }
 314
 315 log_target_t* log_target_stdout_new()
 316 {
 317   log_target_t* tmp = malloc(sizeof(log_target_t));
 318   if(!tmp)
 319     return NULL;
 320
 321   tmp->type_ = TARGET_STDOUT;
 322   tmp->init = NULL;
 323   tmp->open = NULL;
 324   tmp->log = &log_target_stdout_log;
 325   tmp->close = NULL;
 326   tmp->clear = NULL;
 327   tmp->opened_ = 0;
 328   tmp->enabled_ = 0;
 329   tmp->max_prio_ = NOTICE;
 330   tmp->param_ = NULL;
 331   tmp->next_ = NULL;
 332
 333   return tmp;
 334 }
 335
 336
 337 void log_target_stderr_log(log_target_t* self, log_prio_t prio, const char* msg)
 338 {
 339   fprintf(stderr, "%s %s: %s\n", get_time_formatted(), log_prio_to_string(prio), msg);
 340 }
 341
 342 log_target_t* log_target_stderr_new()
 343 {
 344   log_target_t* tmp = malloc(sizeof(log_target_t));
 345   if(!tmp)
 346     return NULL;
 347
 348   tmp->type_ = TARGET_STDERR;
 349   tmp->init = NULL;
 350   tmp->open = NULL;
 351   tmp->log = &log_target_stderr_log;
 352   tmp->close = NULL;
 353   tmp->clear = NULL;
 354   tmp->opened_ = 0;
 355   tmp->enabled_ = 0;
 356   tmp->max_prio_ = NOTICE;
 357   tmp->param_ = NULL;
 358   tmp->next_ = NULL;
 359
 360   return tmp;
 361 }
 362
 363 #endif