libmpdclient.c

   1 /* libmpdclient
   2  * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
   3  * This project's homepage is: http://www.musicpd.org
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include "libmpdclient.h"
  21
  22 #include <errno.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <netdb.h>
  26 #include <stdio.h>
  27 #include <sys/param.h>
  28 #include <string.h>
  29 #include <netinet/in.h>
  30 #include <arpa/inet.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #ifndef HAVE_SOCKLEN_T
  37 typedef int socklen_t;
  38 #endif
  39 #endif
  40
  41 #ifndef MPD_NO_IPV6
  42 #ifdef AF_INET6
  43 #define MPD_HAVE_IPV6
  44 #endif
  45 #endif
  46
  47 #ifdef MPD_HAVE_IPV6
  48 int mpd_ipv6Supported() {
  49         int s;
  50         s = socket(AF_INET6,SOCK_STREAM,0);
  51         if(s == -1) return 0;
  52         close(s);
  53         return 1;
  54 }
  55 #endif
  56
  57
  58 char * mpd_sanitizeArg(const char * arg) {
  59         size_t i;
  60         int count=0;
  61         char * ret;
  62
  63         for(i=0;i<strlen(arg);i++) {
  64                 if(arg[i]=='"' || arg[i]=='\\') count++;
  65         }
  66
  67         ret = malloc(strlen(arg)+count+1);
  68
  69         count = 0;
  70         for(i=0;i<strlen(arg)+1;i++) {
  71                 if(arg[i]=='"' || arg[i]=='\\') {
  72                         ret[i+count] = '\\';
  73                         count++;
  74                 }
  75                 ret[i+count] = arg[i];
  76         }
  77
  78         return ret;
  79 }
  80
  81 mpd_ReturnElement * mpd_newReturnElement(const char * name, const char * value)
  82 {
  83         mpd_ReturnElement * ret = malloc(sizeof(mpd_ReturnElement));
  84
  85         ret->name = strdup(name);
  86         ret->value = strdup(value);
  87
  88         return ret;
  89 }
  90
  91 void mpd_freeReturnElement(mpd_ReturnElement * re) {
  92         free(re->name);
  93         free(re->value);
  94         free(re);
  95 }
  96
  97 void mpd_setConnectionTimeout(mpd_Connection * connection, float timeout) {
  98                 connection->timeout.tv_sec = (int)timeout;
  99                 connection->timeout.tv_usec = (int)(timeout*1e6 -
 100                                 connection->timeout.tv_sec*1000000+0.5);
 101 }
 102
 103 mpd_Connection * mpd_newConnection(const char * host, int port, float timeout) {
 104         int err;
 105         struct hostent * he;
 106         struct sockaddr * dest;
 107         socklen_t destlen;
 108         struct sockaddr_in sin;
 109         char * rt;
 110         char * output;
 111         mpd_Connection * connection = malloc(sizeof(mpd_Connection));
 112         struct timeval tv;
 113         fd_set fds;
 114 #ifdef MPD_HAVE_IPV6
 115         struct sockaddr_in6 sin6;
 116 #endif
 117         strcpy(connection->buffer,"");
 118         connection->buflen = 0;
 119         connection->bufstart = 0;
 120         strcpy(connection->errorStr,"");
 121         connection->error = 0;
 122         connection->doneProcessing = 0;
 123         connection->commandList = 0;
 124         connection->returnElement = NULL;
 125
 126         if(!(he=gethostbyname(host))) {
 127                 snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 128                                 "host \"%s\" not found",host);
 129                 connection->error = MPD_ERROR_UNKHOST;
 130                 return connection;
 131         }
 132
 133         memset(&sin,0,sizeof(struct sockaddr_in));
 134         /*dest.sin_family = he->h_addrtype;*/
 135         sin.sin_family = AF_INET;
 136         sin.sin_port = htons(port);
 137 #ifdef MPD_HAVE_IPV6
 138         memset(&sin6,0,sizeof(struct sockaddr_in6));
 139         sin6.sin6_family = AF_INET6;
 140         sin6.sin6_port = htons(port);
 141 #endif
 142         switch(he->h_addrtype) {
 143         case AF_INET:
 144                 memcpy((char *)&sin.sin_addr.s_addr,(char *)he->h_addr,
 145                                 he->h_length);
 146                 dest = (struct sockaddr *)&sin;
 147                 destlen = sizeof(struct sockaddr_in);
 148                 break;
 149 #ifdef MPD_HAVE_IPV6
 150         case AF_INET6:
 151                 if(!mpd_ipv6Supported()) {
 152                         strcpy(connection->errorStr,"no IPv6 suuport but a "
 153                                         "IPv6 address found\n");
 154                         connection->error = MPD_ERROR_SYSTEM;
 155                         return connection;
 156                 }
 157                 memcpy((char *)&sin6.sin6_addr.s6_addr,(char *)he->h_addr,
 158                                 he->h_length);
 159                 dest = (struct sockaddr *)&sin6;
 160                 destlen = sizeof(struct sockaddr_in6);
 161                 break;
 162 #endif
 163         default:
 164                 strcpy(connection->errorStr,"address type is not IPv4 or "
 165                                 "IPv6\n");
 166                 connection->error = MPD_ERROR_SYSTEM;
 167                 return connection;
 168                 break;
 169         }
 170
 171         if((connection->sock = socket(dest->sa_family,SOCK_STREAM,0))<0) {
 172                 strcpy(connection->errorStr,"problems creating socket");
 173                 connection->error = MPD_ERROR_SYSTEM;
 174                 return connection;
 175         }
 176
 177         /* connect stuff */
 178         {
 179 #ifdef SO_RCVTIMEO
 180                 struct timeval rcvoldto;
 181                 struct timeval sndoldto;
 182                 socklen_t oldlen = sizeof(struct timeval);
 183
 184                 mpd_setConnectionTimeout(connection,timeout);
 185
 186                 tv.tv_sec = connection->timeout.tv_sec;
 187                 tv.tv_usec = connection->timeout.tv_usec;
 188
 189                 if(getsockopt(connection->sock,SOL_SOCKET,SO_RCVTIMEO,&rcvoldto,
 190                                         &oldlen)<0 ||
 191                                 getsockopt(connection->sock,SOL_SOCKET,
 192                                         SO_SNDTIMEO,&sndoldto,&oldlen)<0)
 193                 {
 194                         strcpy(connection->errorStr,"problems getting socket "
 195                                         "timeout\n");
 196                         connection->error = MPD_ERROR_SYSTEM;
 197                         return connection;
 198                 }
 199                 if(setsockopt(connection->sock,SOL_SOCKET,SO_RCVTIMEO,&tv,
 200                                         sizeof(struct timeval))<0 ||
 201                                 setsockopt(connection->sock,SOL_SOCKET,
 202                                         SO_SNDTIMEO,&tv,
 203                                         sizeof(struct timeval))<0)
 204                 {
 205                         strcpy(connection->errorStr,"problems setting socket "
 206                                         "timeout\n");
 207                         connection->error = MPD_ERROR_SYSTEM;
 208                         return connection;
 209                 }
 210 #endif
 211                 if(connect(connection->sock,dest,destlen)<0) {
 212                         snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 213                                         "problems connecting to \"%s\" on port"
 214                                         " %i",host,port);
 215                         connection->error = MPD_ERROR_CONNPORT;
 216                         return connection;
 217                 }
 218 #ifdef SO_RCVTIMEO
 219                 if(setsockopt(connection->sock,SOL_SOCKET,SO_SNDTIMEO,&rcvoldto,
 220                                         sizeof(struct timeval))<0 ||
 221                                 setsockopt(connection->sock,SOL_SOCKET,
 222                                         SO_SNDTIMEO,&sndoldto,
 223                                         sizeof(struct timeval))<0)
 224                 {
 225                         strcpy(connection->errorStr,"problems setting socket "
 226                                         "timeout\n");
 227                         connection->error = MPD_ERROR_SYSTEM;
 228                         return connection;
 229                 }
 230 #endif
 231         }
 232
 233         while(!(rt = strstr(connection->buffer,"\n"))) {
 234                 tv.tv_sec = connection->timeout.tv_sec;
 235                 tv.tv_usec = connection->timeout.tv_usec;
 236                 FD_ZERO(&fds);
 237                 FD_SET(connection->sock,&fds);
 238                 if((err = select(connection->sock+1,&fds,NULL,NULL,&tv)) == 1) {
 239                         int readed;
 240                         readed = recv(connection->sock,
 241                                 &(connection->buffer[connection->buflen]),
 242                                 MPD_BUFFER_MAX_LENGTH-connection->buflen,0);
 243                         if(readed<=0) {
 244                                 snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 245                                         "problems getting a response from"
 246                                         " \"%s\" on port %i",host,
 247                                         port);
 248                                 connection->error = MPD_ERROR_NORESPONSE;
 249                                 return connection;
 250                         }
 251                         connection->buflen+=readed;
 252                         connection->buffer[connection->buflen] = '\0';
 253                         tv.tv_sec = connection->timeout.tv_sec;
 254                         tv.tv_usec = connection->timeout.tv_usec;
 255                 }
 256                 else if(err<0 && errno==EINTR) continue;
 257                 else {
 258                         snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 259                                 "timeout in attempting to get a response from"
 260                                  " \"%s\" on port %i",host,port);
 261                         connection->error = MPD_ERROR_NORESPONSE;
 262                         return connection;
 263                 }
 264         }
 265
 266         *rt = '\0';
 267         output = strdup(connection->buffer);
 268         strcpy(connection->buffer,rt+1);
 269         connection->buflen = strlen(connection->buffer);
 270
 271         if(strncmp(output,MPD_WELCOME_MESSAGE,strlen(MPD_WELCOME_MESSAGE))) {
 272                 free(output);
 273                 snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 274                                 "mpd not running on port %i on host \"%s\"",
 275                                 port,host);
 276                 connection->error = MPD_ERROR_NOTMPD;
 277                 return connection;
 278         }
 279
 280         {
 281                 char * test;
 282                 char * version[3];
 283                 char * tmp = &output[strlen(MPD_WELCOME_MESSAGE)];
 284                 char * search = ".";
 285                 int i;
 286
 287                 for(i=0;i<3;i++) {
 288                         char * tok;
 289                         if(i==3) search = " ";
 290                         version[i] = strtok_r(tmp,search,&tok);
 291                         if(!version[i]) {
 292                                 free(output);
 293                                 snprintf(connection->errorStr,
 294                                         MPD_BUFFER_MAX_LENGTH,
 295                                         "error parsing version number at "
 296                                         "\"%s\"",
 297                                         &output[strlen(MPD_WELCOME_MESSAGE)]);
 298                                 connection->error = MPD_ERROR_NOTMPD;
 299                                 return connection;
 300                         }
 301                         connection->version[i] = strtol(version[i],&test,10);
 302                         if(version[i]==test || *test!='\0') {
 303                                 free(output);
 304                                 snprintf(connection->errorStr,
 305                                         MPD_BUFFER_MAX_LENGTH,
 306                                         "error parsing version number at "
 307                                         "\"%s\"",
 308                                         &output[strlen(MPD_WELCOME_MESSAGE)]);
 309                                 connection->error = MPD_ERROR_NOTMPD;
 310                                 return connection;
 311                         }
 312                         tmp = NULL;
 313                 }
 314         }
 315
 316         free(output);
 317
 318         connection->doneProcessing = 1;
 319
 320         return connection;
 321 }
 322
 323 void mpd_clearError(mpd_Connection * connection) {
 324         connection->error = 0;
 325         connection->errorStr[0] = '\0';
 326 }
 327
 328 void mpd_closeConnection(mpd_Connection * connection) {
 329         close(connection->sock);
 330         if(connection->returnElement) free(connection->returnElement);
 331         free(connection);
 332 }
 333
 334 void mpd_executeCommand(mpd_Connection * connection, char * command) {
 335         int ret;
 336         struct timeval tv;
 337         fd_set fds;
 338         char * commandPtr = command;
 339         int commandLen = strlen(command);
 340
 341         if(!connection->doneProcessing && !connection->commandList) {
 342                 strcpy(connection->errorStr,"not done processing current command");
 343                 connection->error = 1;
 344                 return;
 345         }
 346
 347         mpd_clearError(connection);
 348
 349         FD_ZERO(&fds);
 350         FD_SET(connection->sock,&fds);
 351         tv.tv_sec = connection->timeout.tv_sec;
 352         tv.tv_usec = connection->timeout.tv_usec;
 353
 354         while((ret = select(connection->sock+1,NULL,&fds,NULL,&tv)==1) ||
 355                         (ret==-1 && errno==EINTR)) {
 356                 ret = send(connection->sock,commandPtr,commandLen,
 357                                 MSG_DONTWAIT);
 358                 if(ret<=0)
 359                 {
 360                         if(ret==EAGAIN || ret==EINTR) continue;
 361                         snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 362                                 "problems giving command \"%s\"",command);
 363                         connection->error = MPD_ERROR_SENDING;
 364                         return;
 365                 }
 366                 else {
 367                         commandPtr+=ret;
 368                         commandLen-=ret;
 369                 }
 370
 371                 if(commandLen<=0) break;
 372         }
 373
 374         if(commandLen>0) {
 375                 perror("");
 376                 snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 377                         "timeout sending command \"%s\"",command);
 378                 connection->error = MPD_ERROR_TIMEOUT;
 379                 return;
 380         }
 381
 382         if(!connection->commandList) connection->doneProcessing = 0;
 383 }
 384
 385 void mpd_getNextReturnElement(mpd_Connection * connection) {
 386         char * output = NULL;
 387         char * rt = NULL;
 388         char * name;
 389         char * value;
 390         fd_set fds;
 391         struct timeval tv;
 392         char * tok;
 393         int readed;
 394         char * bufferCheck;
 395         int err;
 396
 397         if(connection->returnElement) mpd_freeReturnElement(connection->returnElement);
 398         connection->returnElement = NULL;
 399
 400         if(connection->doneProcessing) {
 401                 strcpy(connection->errorStr,"already done processing current command");
 402                 connection->error = 1;
 403                 return;
 404         }
 405
 406         bufferCheck = connection->buffer+connection->bufstart;
 407         while(connection->bufstart>=connection->buflen ||
 408                         !(rt = strstr(bufferCheck,"\n"))) {
 409                 if(connection->buflen>=MPD_BUFFER_MAX_LENGTH) {
 410                         memmove(connection->buffer,
 411                                         connection->buffer+
 412                                         connection->bufstart,
 413                                         connection->buflen-
 414                                         connection->bufstart+1);
 415                         bufferCheck-=connection->bufstart;
 416                         connection->buflen-=connection->bufstart;
 417                         connection->bufstart = 0;
 418                 }
 419                 if(connection->buflen>=MPD_BUFFER_MAX_LENGTH) {
 420                         strcpy(connection->errorStr,"buffer overrun");
 421                         connection->error = MPD_ERROR_BUFFEROVERRUN;
 422                         connection->doneProcessing = 1;
 423                         return;
 424                 }
 425                 bufferCheck+=connection->buflen-connection->bufstart;
 426                 tv.tv_sec = connection->timeout.tv_sec;
 427                 tv.tv_usec = connection->timeout.tv_usec;
 428                 FD_ZERO(&fds);
 429                 FD_SET(connection->sock,&fds);
 430                 if((err = select(connection->sock+1,&fds,NULL,NULL,&tv) == 1)) {
 431                         readed = recv(connection->sock,
 432                                 connection->buffer+connection->buflen,
 433                                 MPD_BUFFER_MAX_LENGTH-connection->buflen,
 434                                 MSG_DONTWAIT);
 435                         if(readed<0 && (errno==EAGAIN || errno==EINTR)) {
 436                                 continue;
 437                         }
 438                         if(readed<=0) {
 439                                 strcpy(connection->errorStr,"connection"
 440                                         " closed");
 441                                 connection->error = MPD_ERROR_CONNCLOSED;
 442                                 connection->doneProcessing = 1;
 443                                 return;
 444                         }
 445                         connection->buflen+=readed;
 446                         connection->buffer[connection->buflen] = '\0';
 447                 }
 448                 else if(err<0 && errno==EINTR) continue;
 449                 else {
 450                         strcpy(connection->errorStr,"connection timeout");
 451                         connection->error = MPD_ERROR_TIMEOUT;
 452                         connection->doneProcessing = 1;
 453                         return;
 454                 }
 455         }
 456
 457         *rt = '\0';
 458         output = connection->buffer+connection->bufstart;
 459         connection->bufstart = rt - connection->buffer + 1;
 460
 461         if(strcmp(output,"OK")==0) {
 462                 connection->doneProcessing = 1;
 463                 return;
 464         }
 465         if(strncmp(output,"ACK",strlen("ACK"))==0) {
 466                 strcpy(connection->errorStr,output);
 467                 connection->error = MPD_ERROR_ACK;
 468                 connection->doneProcessing = 1;
 469                 return;
 470         }
 471
 472         name = strtok_r(output,":",&tok);
 473         if(name && (value = strtok_r(NULL,"",&tok)) && value[0]==' ') {
 474                 connection->returnElement = mpd_newReturnElement(name,&(value[1]));
 475         }
 476         else {
 477                 if(!name || !value) {
 478                         snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 479                                         "error parsing: %s",output);
 480                 }
 481                 else {
 482                         snprintf(connection->errorStr,MPD_BUFFER_MAX_LENGTH,
 483                                         "error parsing: %s:%s",name,value);
 484                 }
 485                 connection->errorStr[MPD_BUFFER_MAX_LENGTH] = '\0';
 486                 connection->error = 1;
 487         }
 488 }
 489
 490 void mpd_finishCommand(mpd_Connection * connection) {
 491         while(!connection->doneProcessing) mpd_getNextReturnElement(connection);
 492 }
 493
 494
 495 mpd_Status * mpd_getStatus(mpd_Connection * connection) {
 496         mpd_Status * status;
 497
 498         mpd_executeCommand(connection,"status\n");
 499
 500         if(connection->error) return NULL;
 501
 502         status = malloc(sizeof(mpd_Status));
 503         status->volume = -1;
 504         status->repeat = 0;
 505         status->random = 0;
 506         status->playlist = -1;
 507         status->playlistLength = -1;
 508         status->state = -1;
 509         status->song = 0;
 510         status->elapsedTime = 0;
 511         status->totalTime = 0;
 512         status->bitRate = 0;
 513         status->sampleRate = 0;
 514         status->bits = 0;
 515         status->channels = 0;
 516         status->crossfade = -1;
 517         status->error = NULL;
 518
 519         mpd_getNextReturnElement(connection);
 520         if(connection->error) {
 521                 free(status);
 522                 return NULL;
 523         }
 524         while(connection->returnElement) {
 525                 mpd_ReturnElement * re = connection->returnElement;
 526                 if(strcmp(re->name,"volume")==0) {
 527                         status->volume = atoi(re->value);
 528                 }
 529                 else if(strcmp(re->name,"repeat")==0) {
 530                         status->repeat = atoi(re->value);
 531                 }
 532                 else if(strcmp(re->name,"random")==0) {
 533                         status->random = atoi(re->value);
 534                 }
 535                 else if(strcmp(re->name,"playlist")==0) {
 536                         status->playlist = strtol(re->value,NULL,10);
 537                 }
 538                 else if(strcmp(re->name,"playlistlength")==0) {
 539                         status->playlistLength = atoi(re->value);
 540                 }
 541                 else if(strcmp(re->name,"bitrate")==0) {
 542                         status->bitRate = atoi(re->value);
 543                 }
 544                 else if(strcmp(re->name,"state")==0) {
 545                         if(strcmp(re->value,"play")==0) {
 546                                 status->state = MPD_STATUS_STATE_PLAY;
 547                         }
 548                         else if(strcmp(re->value,"stop")==0) {
 549                                 status->state = MPD_STATUS_STATE_STOP;
 550                         }
 551                         else if(strcmp(re->value,"pause")==0) {
 552                                 status->state = MPD_STATUS_STATE_PAUSE;
 553                         }
 554                         else {
 555                                 status->state = MPD_STATUS_STATE_UNKNOWN;
 556                         }
 557                 }
 558                 else if(strcmp(re->name,"song")==0) {
 559                         status->song = atoi(re->value);
 560                 }
 561                 else if(strcmp(re->name,"time")==0) {
 562                         char * tok;
 563                         char * copy;
 564                         copy = strdup(re->value);
 565                         status->elapsedTime = atoi(strtok_r(copy,":",&tok));
 566                         status->totalTime = atoi(strtok_r(NULL,"",&tok));
 567                         free(copy);
 568                 }
 569                 else if(strcmp(re->name,"error")==0) {
 570                         status->error = strdup(re->value);
 571                 }
 572                 else if(strcmp(re->name,"xfade")==0) {
 573                         status->crossfade = atoi(re->value);
 574                 }
 575                 else if(strcmp(re->name,"audio")==0) {
 576                         char * tok;
 577                         char * copy;
 578                         copy = strdup(re->value);
 579                         status->sampleRate = atoi(strtok_r(copy,":",&tok));
 580                         status->bits = atoi(strtok_r(NULL,":",&tok));
 581                         status->channels = atoi(strtok_r(NULL,"",&tok));
 582                         free(copy);
 583                 }
 584
 585                 mpd_getNextReturnElement(connection);
 586                 if(connection->error) {
 587                         free(status);
 588                         return NULL;
 589                 }
 590         }
 591
 592         if(connection->error) {
 593                 free(status);
 594                 return NULL;
 595         }
 596         else if(status->state<0) {
 597                 strcpy(connection->errorStr,"state not found");
 598                 connection->error = 1;
 599                 free(status);
 600                 return NULL;
 601         }
 602
 603         return status;
 604 }
 605
 606 void mpd_freeStatus(mpd_Status * status) {
 607         if(status->error) free(status->error);
 608         free(status);
 609 }
 610
 611 mpd_Stats * mpd_getStats(mpd_Connection * connection) {
 612         mpd_Stats * stats;
 613
 614         mpd_executeCommand(connection,"stats\n");
 615
 616         if(connection->error) return NULL;
 617
 618         stats = malloc(sizeof(mpd_Stats));
 619         stats->numberOfArtists = 0;
 620         stats->numberOfAlbums = 0;
 621         stats->numberOfSongs = 0;
 622         stats->uptime = 0;
 623         stats->dbUpdateTime = 0;
 624
 625         mpd_getNextReturnElement(connection);
 626         if(connection->error) {
 627                 free(stats);
 628                 return NULL;
 629         }
 630         while(connection->returnElement) {
 631                 mpd_ReturnElement * re = connection->returnElement;
 632                 if(strcmp(re->name,"artists")==0) {
 633                         stats->numberOfArtists = atoi(re->value);
 634                 }
 635                 else if(strcmp(re->name,"albums")==0) {
 636                         stats->numberOfAlbums = atoi(re->value);
 637                 }
 638                 else if(strcmp(re->name,"songs")==0) {
 639                         stats->numberOfSongs = atoi(re->value);
 640                 }
 641                 else if(strcmp(re->name,"uptime")==0) {
 642                         stats->uptime = strtol(re->value,NULL,10);
 643                 }
 644                 else if(strcmp(re->name,"db_update")==0) {
 645                         stats->dbUpdateTime = strtol(re->value,NULL,10);
 646                 }
 647
 648                 mpd_getNextReturnElement(connection);
 649                 if(connection->error) {
 650                         free(stats);
 651                         return NULL;
 652                 }
 653         }
 654
 655         if(connection->error) {
 656                 free(stats);
 657                 return NULL;
 658         }
 659
 660         return stats;
 661 }
 662
 663 void mpd_freeStats(mpd_Stats * stats) {
 664         free(stats);
 665 }
 666
 667 void mpd_initSong(mpd_Song * song) {
 668         song->file = NULL;
 669         song->artist = NULL;
 670         song->album = NULL;
 671         song->track = NULL;
 672         song->title = NULL;
 673         song->time = MPD_SONG_NO_TIME;
 674 }
 675
 676 void mpd_finishSong(mpd_Song * song) {
 677         if(song->file) free(song->file);
 678         if(song->artist) free(song->artist);
 679         if(song->album) free(song->album);
 680         if(song->title) free(song->title);
 681         if(song->track) free(song->track);
 682 }
 683
 684 mpd_Song * mpd_newSong() {
 685         mpd_Song * ret = malloc(sizeof(mpd_Song));
 686
 687         mpd_initSong(ret);
 688
 689         return ret;
 690 }
 691
 692 void mpd_freeSong(mpd_Song * song) {
 693         mpd_finishSong(song);
 694         free(song);
 695 }
 696
 697 mpd_Song * mpd_songDup(mpd_Song * song) {
 698         mpd_Song * ret = mpd_newSong();
 699
 700         if(song->file) ret->file = strdup(song->file);
 701         if(song->artist) ret->artist = strdup(song->artist);
 702         if(song->album) ret->album = strdup(song->album);
 703         if(song->title) ret->title = strdup(song->title);
 704         if(song->track) ret->track = strdup(song->track);
 705         ret->time = song->time;
 706
 707         return ret;
 708 }
 709
 710 void mpd_initDirectory(mpd_Directory * directory) {
 711         directory->path = NULL;
 712 }
 713
 714 void mpd_finishDirectory(mpd_Directory * directory) {
 715         if(directory->path) free(directory->path);
 716 }
 717
 718 mpd_Directory * mpd_newDirectory () {
 719         mpd_Directory * directory = malloc(sizeof(mpd_Directory));;
 720
 721         mpd_initDirectory(directory);
 722
 723         return directory;
 724 }
 725
 726 void mpd_freeDirectory(mpd_Directory * directory) {
 727         mpd_finishDirectory(directory);
 728
 729         free(directory);
 730 }
 731
 732 mpd_Directory * mpd_directoryDup(mpd_Directory * directory) {
 733         mpd_Directory * ret = mpd_newDirectory();
 734
 735         if(directory->path) ret->path = strdup(directory->path);
 736
 737         return ret;
 738 }
 739
 740 void mpd_initPlaylistFile(mpd_PlaylistFile * playlist) {
 741         playlist->path = NULL;
 742 }
 743
 744 void mpd_finishPlaylistFile(mpd_PlaylistFile * playlist) {
 745         if(playlist->path) free(playlist->path);
 746 }
 747
 748 mpd_PlaylistFile * mpd_newPlaylistFile() {
 749         mpd_PlaylistFile * playlist = malloc(sizeof(mpd_PlaylistFile));
 750
 751         mpd_initPlaylistFile(playlist);
 752
 753         return playlist;
 754 }
 755
 756 void mpd_freePlaylistFile(mpd_PlaylistFile * playlist) {
 757         mpd_finishPlaylistFile(playlist);
 758         free(playlist);
 759 }
 760
 761 mpd_PlaylistFile * mpd_playlistFileDup(mpd_PlaylistFile * playlist) {
 762         mpd_PlaylistFile * ret = mpd_newPlaylistFile();
 763
 764         if(playlist->path) ret->path = strdup(playlist->path);
 765
 766         return ret;
 767 }
 768
 769 void mpd_initInfoEntity(mpd_InfoEntity * entity) {
 770         entity->info.directory = NULL;
 771 }
 772
 773 void mpd_finishInfoEntity(mpd_InfoEntity * entity) {
 774         if(entity->info.directory) {
 775                 if(entity->type == MPD_INFO_ENTITY_TYPE_DIRECTORY) {
 776                         mpd_freeDirectory(entity->info.directory);
 777                 }
 778                 else if(entity->type == MPD_INFO_ENTITY_TYPE_SONG) {
 779                         mpd_freeSong(entity->info.song);
 780                 }
 781                 else if(entity->type == MPD_INFO_ENTITY_TYPE_PLAYLISTFILE) {
 782                         mpd_freePlaylistFile(entity->info.playlistFile);
 783                 }
 784         }
 785 }
 786
 787 mpd_InfoEntity * mpd_newInfoEntity() {
 788         mpd_InfoEntity * entity = malloc(sizeof(mpd_InfoEntity));
 789
 790         mpd_initInfoEntity(entity);
 791
 792         return entity;
 793 }
 794
 795 void mpd_freeInfoEntity(mpd_InfoEntity * entity) {
 796         mpd_finishInfoEntity(entity);
 797         free(entity);
 798 }
 799
 800 void mpd_sendInfoCommand(mpd_Connection * connection, char * command) {
 801         mpd_executeCommand(connection,command);
 802 }
 803
 804 mpd_InfoEntity * mpd_getNextInfoEntity(mpd_Connection * connection) {
 805         mpd_InfoEntity * entity = NULL;
 806
 807         if(connection->doneProcessing) return NULL;
 808
 809         if(!connection->returnElement) mpd_getNextReturnElement(connection);
 810
 811         if(connection->returnElement) {
 812                 if(strcmp(connection->returnElement->name,"file")==0) {
 813                         entity = mpd_newInfoEntity();
 814                         entity->type = MPD_INFO_ENTITY_TYPE_SONG;
 815                         entity->info.song = mpd_newSong();
 816                         entity->info.song->file =
 817                                 strdup(connection->returnElement->value);
 818                 }
 819                 else if(strcmp(connection->returnElement->name,
 820                                         "directory")==0) {
 821                         entity = mpd_newInfoEntity();
 822                         entity->type = MPD_INFO_ENTITY_TYPE_DIRECTORY;
 823                         entity->info.directory = mpd_newDirectory();
 824                         entity->info.directory->path =
 825                                 strdup(connection->returnElement->value);
 826                 }
 827                 else if(strcmp(connection->returnElement->name,"playlist")==0) {
 828                         entity = mpd_newInfoEntity();
 829                         entity->type = MPD_INFO_ENTITY_TYPE_PLAYLISTFILE;
 830                         entity->info.playlistFile = mpd_newPlaylistFile();
 831                         entity->info.playlistFile->path =
 832                                 strdup(connection->returnElement->value);
 833                 }
 834                 else {
 835                         connection->error = 1;
 836                         strcpy(connection->errorStr,"problem parsing song info");
 837                         return NULL;
 838                 }
 839         }
 840         else return NULL;
 841
 842         mpd_getNextReturnElement(connection);
 843         while(connection->returnElement) {
 844                 mpd_ReturnElement * re = connection->returnElement;
 845
 846                 if(strcmp(re->name,"file")==0) return entity;
 847                 else if(strcmp(re->name,"directory")==0) return entity;
 848                 else if(strcmp(re->name,"playlist")==0) return entity;
 849
 850                 if(entity->type == MPD_INFO_ENTITY_TYPE_SONG &&
 851                                 strlen(re->value)) {
 852                         if(!entity->info.song->artist &&
 853                                         strcmp(re->name,"Artist")==0) {
 854                                 entity->info.song->artist = strdup(re->value);
 855                         }
 856                         else if(!entity->info.song->album &&
 857                                         strcmp(re->name,"Album")==0) {
 858                                 entity->info.song->album = strdup(re->value);
 859                         }
 860                         else if(!entity->info.song->title &&
 861                                         strcmp(re->name,"Title")==0) {
 862                                 entity->info.song->title = strdup(re->value);
 863                         }
 864                         else if(!entity->info.song->track &&
 865                                         strcmp(re->name,"Track")==0) {
 866                                 entity->info.song->track = strdup(re->value);
 867                         }
 868                         else if(entity->info.song->time==MPD_SONG_NO_TIME &&
 869                                         strcmp(re->name,"Time")==0) {
 870                                 entity->info.song->time = atoi(re->value);
 871                         }
 872                 }
 873                 else if(entity->type == MPD_INFO_ENTITY_TYPE_DIRECTORY) {
 874                 }
 875                 else if(entity->type == MPD_INFO_ENTITY_TYPE_PLAYLISTFILE) {
 876                 }
 877
 878                 mpd_getNextReturnElement(connection);
 879         }
 880
 881         return entity;
 882 }
 883
 884 char * mpd_getNextReturnElementNamed(mpd_Connection * connection,
 885                 const char * name)
 886 {
 887         if(connection->doneProcessing) return NULL;
 888
 889         mpd_getNextReturnElement(connection);
 890         while(connection->returnElement) {
 891                 mpd_ReturnElement * re = connection->returnElement;
 892
 893                 if(strcmp(re->name,name)==0) return strdup(re->value);
 894                 mpd_getNextReturnElement(connection);
 895         }
 896
 897         return NULL;
 898 }
 899
 900 char * mpd_getNextArtist(mpd_Connection * connection) {
 901         return mpd_getNextReturnElementNamed(connection,"Artist");
 902 }
 903
 904 char * mpd_getNextAlbum(mpd_Connection * connection) {
 905         return mpd_getNextReturnElementNamed(connection,"Album");
 906 }
 907
 908 void mpd_sendPlaylistInfoCommand(mpd_Connection * connection, int songNum) {
 909         char * string = malloc(strlen("playlistinfo")+25);
 910         sprintf(string,"playlistinfo \"%i\"\n",songNum);
 911         mpd_sendInfoCommand(connection,string);
 912         free(string);
 913 }
 914
 915 void mpd_sendListallCommand(mpd_Connection * connection, const char * dir) {
 916         char * sDir = mpd_sanitizeArg(dir);
 917         char * string = malloc(strlen("listall")+strlen(sDir)+5);
 918         sprintf(string,"listall \"%s\"\n",sDir);
 919         mpd_sendInfoCommand(connection,string);
 920         free(string);
 921         free(sDir);
 922 }
 923
 924 void mpd_sendListallInfoCommand(mpd_Connection * connection, const char * dir) {
 925         char * sDir = mpd_sanitizeArg(dir);
 926         char * string = malloc(strlen("listallinfo")+strlen(sDir)+5);
 927         sprintf(string,"listallinfo \"%s\"\n",sDir);
 928         mpd_sendInfoCommand(connection,string);
 929         free(string);
 930         free(sDir);
 931 }
 932
 933 void mpd_sendLsInfoCommand(mpd_Connection * connection, const char * dir) {
 934         char * sDir = mpd_sanitizeArg(dir);
 935         char * string = malloc(strlen("lsinfo")+strlen(sDir)+5);
 936         sprintf(string,"lsinfo \"%s\"\n",sDir);
 937         mpd_sendInfoCommand(connection,string);
 938         free(string);
 939         free(sDir);
 940 }
 941
 942 void mpd_sendSearchCommand(mpd_Connection * connection, int table,
 943                 const char * str)
 944 {
 945         char st[10];
 946         char * string;
 947         char * sanitStr = mpd_sanitizeArg(str);
 948         if(table == MPD_TABLE_ARTIST) strcpy(st,"artist");
 949         else if(table == MPD_TABLE_ALBUM) strcpy(st,"album");
 950         else if(table == MPD_TABLE_TITLE) strcpy(st,"title");
 951         else if(table == MPD_TABLE_FILENAME) strcpy(st,"filename");
 952         else {
 953                 connection->error = 1;
 954                 strcpy(connection->errorStr,"unknown table for search");
 955                 return;
 956         }
 957         string = malloc(strlen("search")+strlen(sanitStr)+strlen(st)+6);
 958         sprintf(string,"search %s \"%s\"\n",st,sanitStr);
 959         mpd_sendInfoCommand(connection,string);
 960         free(string);
 961         free(sanitStr);
 962 }
 963
 964 void mpd_sendFindCommand(mpd_Connection * connection, int table,
 965                 const char * str)
 966 {
 967         char st[10];
 968         char * string;
 969         char * sanitStr = mpd_sanitizeArg(str);
 970         if(table == MPD_TABLE_ARTIST) strcpy(st,"artist");
 971         else if(table == MPD_TABLE_ALBUM) strcpy(st,"album");
 972         else if(table == MPD_TABLE_TITLE) strcpy(st,"title");
 973         else {
 974                 connection->error = 1;
 975                 strcpy(connection->errorStr,"unknown table for find");
 976                 return;
 977         }
 978         string = malloc(strlen("find")+strlen(sanitStr)+strlen(st)+6);
 979         sprintf(string,"find %s \"%s\"\n",st,sanitStr);
 980         mpd_sendInfoCommand(connection,string);
 981         free(string);
 982         free(sanitStr);
 983 }
 984
 985 void mpd_sendListCommand(mpd_Connection * connection, int table,
 986                 const char * arg1)
 987 {
 988         char st[10];
 989         char * string;
 990         if(table == MPD_TABLE_ARTIST) strcpy(st,"artist");
 991         else if(table == MPD_TABLE_ALBUM) strcpy(st,"album");
 992         else {
 993                 connection->error = 1;
 994                 strcpy(connection->errorStr,"unknown table for list");
 995                 return;
 996         }
 997         if(arg1) {
 998                 char * sanitArg1 = mpd_sanitizeArg(arg1);
 999                 string = malloc(strlen("list")+strlen(sanitArg1)+strlen(st)+6);
1000                 sprintf(string,"list %s \"%s\"\n",st,sanitArg1);
1001                 free(sanitArg1);
1002         }
1003         else {
1004                 string = malloc(strlen("list")+strlen(st)+3);
1005                 sprintf(string,"list %s\n",st);
1006         }
1007         mpd_sendInfoCommand(connection,string);
1008         free(string);
1009 }
1010
1011 void mpd_sendAddCommand(mpd_Connection * connection, const char * file) {
1012         char * sFile = mpd_sanitizeArg(file);
1013         char * string = malloc(strlen("add")+strlen(sFile)+5);
1014         sprintf(string,"add \"%s\"\n",sFile);
1015         mpd_executeCommand(connection,string);
1016         free(string);
1017         free(sFile);
1018 }
1019
1020 void mpd_sendDeleteCommand(mpd_Connection * connection, int songNum) {
1021         char * string = malloc(strlen("delete")+25);
1022         sprintf(string,"delete \"%i\"\n",songNum);
1023         mpd_sendInfoCommand(connection,string);
1024         free(string);
1025 }
1026
1027 void mpd_sendSaveCommand(mpd_Connection * connection, const char * name) {
1028         char * sName = mpd_sanitizeArg(name);
1029         char * string = malloc(strlen("save")+strlen(sName)+5);
1030         sprintf(string,"save \"%s\"\n",sName);
1031         mpd_executeCommand(connection,string);
1032         free(string);
1033         free(sName);
1034 }
1035
1036 void mpd_sendLoadCommand(mpd_Connection * connection, const char * name) {
1037         char * sName = mpd_sanitizeArg(name);
1038         char * string = malloc(strlen("load")+strlen(sName)+5);
1039         sprintf(string,"load \"%s\"\n",sName);
1040         mpd_executeCommand(connection,string);
1041         free(string);
1042         free(sName);
1043 }
1044
1045 void mpd_sendRmCommand(mpd_Connection * connection, const char * name) {
1046         char * sName = mpd_sanitizeArg(name);
1047         char * string = malloc(strlen("rm")+strlen(sName)+5);
1048         sprintf(string,"rm \"%s\"\n",sName);
1049         mpd_executeCommand(connection,string);
1050         free(string);
1051         free(sName);
1052 }
1053
1054 void mpd_sendShuffleCommand(mpd_Connection * connection) {
1055         mpd_executeCommand(connection,"shuffle\n");
1056 }
1057
1058 void mpd_sendClearCommand(mpd_Connection * connection) {
1059         mpd_executeCommand(connection,"clear\n");
1060 }
1061
1062 void mpd_sendPlayCommand(mpd_Connection * connection, int songNum) {
1063         char * string = malloc(strlen("play")+25);
1064         sprintf(string,"play \"%i\"\n",songNum);
1065         mpd_sendInfoCommand(connection,string);
1066         free(string);
1067 }
1068
1069 void mpd_sendStopCommand(mpd_Connection * connection) {
1070         mpd_executeCommand(connection,"stop\n");
1071 }
1072
1073 void mpd_sendPauseCommand(mpd_Connection * connection) {
1074         mpd_executeCommand(connection,"pause\n");
1075 }
1076
1077 void mpd_sendNextCommand(mpd_Connection * connection) {
1078         mpd_executeCommand(connection,"next\n");
1079 }
1080
1081 void mpd_sendMoveCommand(mpd_Connection * connection, int from, int to) {
1082         char * string = malloc(strlen("move")+25);
1083         sprintf(string,"move \"%i\" \"%i\"\n",from,to);
1084         mpd_sendInfoCommand(connection,string);
1085         free(string);
1086 }
1087
1088 void mpd_sendSwapCommand(mpd_Connection * connection, int song1, int song2) {
1089         char * string = malloc(strlen("swap")+25);
1090         sprintf(string,"swap \"%i\" \"%i\"\n",song1,song2);
1091         mpd_sendInfoCommand(connection,string);
1092         free(string);
1093 }
1094
1095 void mpd_sendSeekCommand(mpd_Connection * connection, int song, int time) {
1096         char * string = malloc(strlen("seek")+25);
1097         sprintf(string,"seek \"%i\" \"%i\"\n",song,time);
1098         mpd_sendInfoCommand(connection,string);
1099         free(string);
1100 }
1101
1102 void mpd_sendUpdateCommand(mpd_Connection * connection) {
1103         mpd_executeCommand(connection,"update\n");
1104 }
1105
1106 void mpd_sendPrevCommand(mpd_Connection * connection) {
1107         mpd_executeCommand(connection,"previous\n");
1108 }
1109
1110 void mpd_sendRepeatCommand(mpd_Connection * connection, int repeatMode) {
1111         char * string = malloc(strlen("repeat")+25);
1112         sprintf(string,"repeat \"%i\"\n",repeatMode);
1113         mpd_executeCommand(connection,string);
1114         free(string);
1115 }
1116
1117 void mpd_sendRandomCommand(mpd_Connection * connection, int randomMode) {
1118         char * string = malloc(strlen("random")+25);
1119         sprintf(string,"random \"%i\"\n",randomMode);
1120         mpd_executeCommand(connection,string);
1121         free(string);
1122 }
1123
1124 void mpd_sendSetvolCommand(mpd_Connection * connection, int volumeChange) {
1125         char * string = malloc(strlen("setvol")+25);
1126         sprintf(string,"setvol \"%i\"\n",volumeChange);
1127         mpd_executeCommand(connection,string);
1128         free(string);
1129 }
1130
1131 void mpd_sendVolumeCommand(mpd_Connection * connection, int volumeChange) {
1132         char * string = malloc(strlen("volume")+25);
1133         sprintf(string,"volume \"%i\"\n",volumeChange);
1134         mpd_executeCommand(connection,string);
1135         free(string);
1136 }
1137
1138 void mpd_sendCrossfadeCommand(mpd_Connection * connection, int seconds) {
1139         char * string = malloc(strlen("crossfade")+25);
1140         sprintf(string,"crossfade \"%i\"\n",seconds);
1141         mpd_executeCommand(connection,string);
1142         free(string);
1143 }
1144
1145 void mpd_sendPasswordCommand(mpd_Connection * connection, const char * pass) {
1146         char * sPass = mpd_sanitizeArg(pass);
1147         char * string = malloc(strlen("password")+strlen(sPass)+5);
1148         sprintf(string,"password \"%s\"\n",sPass);
1149         mpd_executeCommand(connection,string);
1150         free(string);
1151         free(sPass);
1152 }
1153
1154 void mpd_sendCommandListBegin(mpd_Connection * connection) {
1155         if(connection->commandList) {
1156                 strcpy(connection->errorStr,"already in command list mode");
1157                 connection->error = 1;
1158                 return;
1159         }
1160         connection->commandList = 1;
1161         mpd_executeCommand(connection,"command_list_begin\n");
1162 }
1163
1164 void mpd_sendCommandListEnd(mpd_Connection * connection) {
1165         if(!connection->commandList) {
1166                 strcpy(connection->errorStr,"not in command list mode");
1167                 connection->error = 1;
1168                 return;
1169         }
1170         connection->commandList = 0;
1171         mpd_executeCommand(connection,"command_list_end\n");
1172 }