src/ivac.c

   1 /* ivac.c -- main ivac file
   2  *
   3  * author: hackbard@hackdaworld.dyndns.org
   4  *         frank.zirkelbach@physik.uni-augsburg.de
   5  *
   6  * Copyright (C) 2004 Frank Zirkelbach
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 // #define USE_GTK
  25
  26 #include "ivac.h"
  27
  28 int usage(void) {
  29
  30   puts("");
  31   puts("usage: ivac <options>");
  32   puts("");
  33   puts("options:");
  34   puts("-h \t\t show this help");
  35   puts("-n <name> \t specify your name");
  36   puts("-p <port> \t specify port to listen for incoming connections");
  37   puts("-d <device> \t specify audio device");
  38   puts("");
  39
  40   return SUCCESS;
  41 }
  42
  43 int main(int argc,char **argv) {
  44
  45   /* TESTING BY NOW */
  46
  47   t_ivac ivac;
  48   int i;
  49
  50   /* default values */
  51   strcpy(ivac.username,"ivac");
  52   ivac.net.l_port=IVAC_LISTEN_PORT;
  53   strcpy(ivac.audio.dsp_dev,SOUND_DEVICE);
  54
  55   /* parse argv and change default values */
  56   for(i=1;i<argc;i++) {
  57     if(argv[i][0]=='-') {
  58       switch(argv[i][1]) {
  59         case 'h':
  60           usage();
  61           return SUCCESS;
  62         case 'n':
  63           strncpy(ivac.username,argv[++i],CHAR_USERNAME);
  64           break;
  65         case 'p':
  66           ivac.net.l_port=atoi(argv[++i]);
  67           break;
  68         case 'd':
  69           strncpy(ivac.audio.dsp_dev,argv[++i],MAX_CHAR_DEVICE);
  70           break;
  71         default:
  72           usage();
  73           return ERROR;
  74       }
  75     }
  76     else usage();
  77   }
  78
  79   /* clear challenger struct */
  80   for(i=0;i<MAX_CONNECTIONS;i++)
  81     memset(&(ivac.challenger[i]),0,sizeof(t_challenger));
  82   /* zero console buffer */
  83   for(i=0;i<IVAC_CONSOLE_LEN;i++)
  84     memset(ivac.console[i],0,IVAC_CONSOLE_STRING_LEN);
  85
  86   /* set capabilities (futur: set by check routines) */
  87   ivac.g_cap=NETWORK;
  88   ivac.av_cap=AUDIO|VIDEO|DUPLEX;
  89
  90   /* set event timeout */
  91   ivac.event.timeout.tv_sec=IVAC_S_SEC;
  92   ivac.event.timeout.tv_usec=IVAC_S_USEC;
  93   /* event init */
  94   event_init(&(ivac.event));
  95
  96   /* input init */
  97   ivac.input.mode=CONTENT_BUFFER;
  98   input_init(&(ivac.input));
  99
 100   /* network init */
 101   if(network_init(&(ivac.net))==N_ERROR) {
 102     printf("[ivac] use 'fuser -n tcp %d' to determine the process to kill!\n",
 103            ivac.net.l_port);
 104     ivac_shutdown(&ivac);
 105     return ERROR;
 106   }
 107
 108   /* add listening port + stdin to (read) event system */
 109   event_math(ivac.net.l_fd,&(ivac.event),READ,ADD);
 110   event_math(0,&(ivac.event),READ,ADD);
 111
 112   /* display init */
 113   display_init(&(ivac.display));
 114
 115   /* use hardcoded audio settings by now */
 116   ivac.audio.fmt=BIT_8;
 117   ivac.audio.channels=MONO;
 118   ivac.audio.speed=8000;
 119   /* audio init */
 120   audio_init(&(ivac.audio));
 121   audio_setup(&(ivac.audio));
 122
 123   /* display */
 124   ivac_display(&(ivac.display));
 125
 126   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
 127   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
 128
 129   return SUCCESS;
 130 }
 131
 132 int ivac_shutdown(t_ivac *ivac) {
 133
 134   network_shutdown(&(ivac->net));
 135   input_shutdown(&(ivac->input));
 136   event_stop(&(ivac->event));
 137   audio_shutdown(&(ivac->audio));
 138   display_shutdown(&(ivac->display));
 139
 140   return SUCCESS;
 141 }
 142
 143 int ivac_send_info(int channel,t_ivac *ivac) {
 144
 145   char data[SEND_N_MAX];
 146   int size;
 147
 148   size=strlen(ivac->username);
 149
 150   data[0]=IVAC_SEND_NAME;
 151   data[1]=size;
 152   strncpy(data+2,ivac->username,size);
 153   size+=2;
 154
 155   data[size]=IVAC_SEND_G_CAP;
 156   data[size+1]=1;
 157   data[size+2]=ivac->g_cap;
 158   size+=3;
 159
 160   data[size]=IVAC_SEND_AV_CAP;
 161   data[size+1]=2;
 162   data[size+2]=(ivac->av_cap)>>8;
 163   data[size+3]=(ivac->av_cap)&0xff;
 164   size+=4;
 165
 166   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
 167     puts("[ivac] ivac_send_info failed");
 168     return ERROR;
 169   }
 170
 171   return SUCCESS;
 172 }
 173
 174 int ivac_send_quit(int channel,t_ivac *ivac) {
 175
 176   char data[7]; /* one more for \0 */
 177
 178   data[0]=IVAC_SEND_QUIT;
 179   data[1]=4;
 180   strcpy(data+2,"quit");
 181
 182   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 183     puts("[ivac] ivac_send_quit failed");
 184     return ERROR;
 185   }
 186
 187   return SUCCESS;
 188 }
 189
 190 int ivac_receive_info(int channel,t_ivac *ivac) {
 191
 192   char data[SEND_N_MAX];
 193   char c_str[IVAC_CONSOLE_STRING_LEN];
 194   int count,length;
 195
 196   count=0;
 197
 198   if((length=network_receive(ivac->net.connection[channel].fd,
 199                              data,SEND_N_MAX))==N_ERROR) {
 200     puts("[ivac] ivac_receive_info failed");
 201     return ERROR;
 202   }
 203
 204   while(length-count) {
 205     switch(data[count]) {
 206       case IVAC_SEND_NAME:
 207         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 208         ivac->challenger[channel].name[data[count+1]]='\0';
 209         count+=(data[count+1]+2);
 210         break;
 211       case IVAC_SEND_G_CAP:
 212         ivac->challenger[channel].g_cap=data[count+2];
 213         count+=3;
 214         break;
 215       case IVAC_SEND_AV_CAP:
 216         ivac->challenger[channel].av_cap=data[count+2]<<8;
 217         ivac->challenger[channel].av_cap|=data[count+3];
 218         count+=4;
 219         break;
 220       case IVAC_SEND_QUIT:
 221         if(!(strncmp(data+count+2,"quit",data[1])))
 222           sprintf(c_str,"channel %02d: connection closed by remote host",
 223                   channel);
 224           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 225                      READ,REMOVE);
 226           network_close(&(ivac->net),channel);
 227           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 228           ivac_add_to_monitor(ivac,c_str);
 229           count+=6;
 230           break;
 231       default:
 232         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
 233                data[count]);
 234         ivac_add_to_monitor(ivac,c_str);
 235         return ERROR;
 236         break;
 237     }
 238   }
 239
 240   return length;
 241 }
 242
 243 int ivac_event_cb(t_event *event,void *ptr) {
 244
 245   t_ivac *ivac;
 246   int channel;
 247   char c_str[IVAC_CONSOLE_STRING_LEN];
 248
 249   ivac=(t_ivac *)ptr;
 250
 251   /* incoming connection -- first contact => send info */
 252   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 253     channel=network_manage_incoming(&(ivac->net));
 254     if(channel==N_E_ACCEPT)
 255       sprintf(c_str,"accept failed");
 256     else if(channel==N_E_MAXC)
 257       sprintf(c_str,"maximum connections reached");
 258     else {
 259       sprintf(c_str,"connection from %s port %d on channel %d",
 260               ivac->net.connection[channel].ip,
 261               ivac->net.connection[channel].port,channel);
 262       ivac_add_to_monitor(ivac,c_str);
 263       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 264       ivac_send_info(channel,ivac);
 265     }
 266     ivac_display_content(ivac);
 267   }
 268
 269   /* wait for user info */
 270   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 271     if(ivac->net.connection[channel].status&C_ESTABL) {
 272       /* remote is sending info */
 273       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
 274         if(ivac_receive_info(channel,ivac)==0) {
 275           event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
 276           network_close(&(ivac->net),channel);
 277           sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
 278           ivac_add_to_monitor(ivac,c_str);
 279         }
 280         ivac_display_content(ivac);
 281       }
 282     }
 283   }
 284
 285   /* user interaction */
 286   if(FD_ISSET(0,&(event->rfds)))
 287     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 288
 289   return SUCCESS;
 290 }
 291
 292 int ivac_regular_cb(t_event *event,void *ptr) {
 293
 294   /* usual jobs like audio & video transmit ... */
 295
 296   return SUCCESS;
 297 }
 298
 299 int ivac_parse_command(t_input *input,void *ptr) {
 300
 301   t_ivac *ivac;
 302   int i,j,k;
 303   int len;
 304   int channel;
 305   char *data,valid;
 306   char c_str[IVAC_CONSOLE_STRING_LEN];
 307   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 308
 309   ivac=(t_ivac *)ptr;
 310   data=input->content;
 311   valid=0;
 312
 313   /* refresh prompt content only! */
 314   ivac_display_prompt_content(ivac);
 315
 316   /* parse command routines */
 317   if(data[input->c_count-1]=='\n') {
 318
 319     /* delete console string + args */
 320     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 321     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 322
 323     /* get args */
 324     len=0;
 325     while(data[len]!='\n') len++;
 326     i=0; j=0;
 327     while((i<len) && (j<IVAC_ARG_COUNT)) {
 328       k=0;
 329       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 330         arg[j][k]=data[i+k];
 331         k++;
 332       }
 333       arg[j][k]='\0';
 334       j++;
 335       /* skip all ' ' */
 336       while(data[i+k]==' ') k++;
 337       i+=k;
 338     }
 339
 340     /* parse command  aka arg[0] */
 341     if(!(strncmp(arg[0],"quit",4))) {
 342       valid=1;
 343       sprintf(c_str,"ivac shutdown ...");
 344       for(i=0;i<MAX_CONNECTIONS;i++) {
 345         if(ivac->net.connection[i].status&C_ESTABL) {
 346           ivac_send_quit(i,ivac);
 347           network_close(&(ivac->net),i);
 348         }
 349       }
 350       ivac_shutdown(ivac);
 351     }
 352     if(!(strncmp(arg[0],"set",3))) {
 353       valid=1;
 354       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 355       else channel=-1;
 356       if(!(strncmp(arg[1],"name",4))) {
 357         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 358         sprintf(c_str,"changed username to %s",ivac->username);
 359       }
 360       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 361         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 362         if(i==N_E_IN_USE)
 363           sprintf(c_str,"channel %02d: connection in use",channel);
 364         if(i==N_SUCCESS)
 365           sprintf(c_str,"channel %02d: set connection info",channel);
 366       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 367                       arg[1]);
 368     }
 369     if(!(strncmp(arg[0],"connect",7))) {
 370       valid=1;
 371       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 372       else channel=-1;
 373       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 374         i=network_connect(&(ivac->net),channel);
 375         if(i==N_E_IN_USE)
 376           sprintf(c_str,"channel %02d: connection in use",channel);
 377         else if(i==N_E_NO_INFO)
 378           sprintf(c_str,"channel %02d: channel not configured",channel);
 379         else {
 380           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 381                   ivac->net.connection[channel].ip,
 382                   ivac->net.connection[channel].port);
 383           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 384           ivac_send_info(channel,ivac);
 385         }
 386       }
 387       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 388     }
 389     if(!(strncmp(arg[0],"close",5))) {
 390       valid=1;
 391       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 392       else channel=-1;
 393       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 394         if(ivac->net.connection[channel].status&C_ESTABL) {
 395           ivac_send_quit(channel,ivac);
 396           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 397                      READ,REMOVE);
 398           network_close(&(ivac->net),channel);
 399           sprintf(c_str,"channel %02d: connection closed",channel);
 400           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 401         }
 402         else
 403           sprintf(c_str,"channel %02d: no active connection",channel);
 404       }
 405       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 406     }
 407     if(!(strncmp(arg[0],"select",6))) {
 408       valid=1;
 409       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 410       else channel=-1;
 411       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 412         network_select(&(ivac->net),channel);
 413         sprintf(c_str,"selected channel %d",channel);
 414       }
 415       else if(arg[1][0]='*') {
 416         network_select(&(ivac->net),MAX_CONNECTIONS);
 417         strcpy(c_str,"selected all channels");
 418       }
 419       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 420     }
 421     if(!(strncmp(arg[0],"deselect",8))) {
 422       valid=1;
 423       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 424       else channel=-1;
 425       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 426         network_deselect(&(ivac->net),channel);
 427         sprintf(c_str,"deselected channel %d",channel);
 428       }
 429       else if(arg[1][0]='*') {
 430         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 431         strcpy(c_str,"deselected all channels");
 432       }
 433       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 434     }
 435
 436     if(!valid)
 437       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 438
 439     /* call network functions */
 440     network_manage_connection(&(ivac->net));
 441
 442     /* add console string to console buffer */
 443     ivac_add_to_monitor(ivac,c_str);
 444
 445     /* refresh whole display content */
 446     ivac_display_content(ivac);
 447
 448     /* delete content buffer + reset counter */
 449     memset(input->content,0,input->c_count-1);
 450     input->c_count=0;
 451
 452   }
 453
 454   return SUCCESS;
 455 }
 456
 457 int ivac_display_head(t_display *display) {
 458
 459   puts("#########################################################");
 460   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
 461   puts("#########################################################");
 462
 463   return SUCCESS;
 464 }
 465
 466 int ivac_display_box(t_display *display) {
 467
 468   return SUCCESS;
 469 }
 470
 471 int ivac_display_box_content(t_ivac *ivac) {
 472
 473   int channel;
 474
 475   /* prepare challenger names */
 476   for(channel=0;channel<MAX_CONNECTIONS;channel++)
 477     if(ivac->challenger[channel].name[0]==0)
 478       strcpy(ivac->challenger[channel].name,"<empty>");
 479
 480   return SUCCESS;
 481 }
 482
 483 int ivac_display_console(t_display *display) {
 484
 485   return SUCCESS;
 486 }
 487
 488 int ivac_display_console_content(t_ivac *ivac) {
 489
 490   int i;
 491
 492   for(i=0;i<IVAC_CONSOLE_LEN;i++)
 493     printf("[ivac] console line %d: %s\n",i,ivac->console[i]);
 494
 495   return SUCCESS;
 496 }
 497
 498 int ivac_display_prompt(t_display *display) {
 499
 500   return SUCCESS;
 501 }
 502
 503 int ivac_display_prompt_content(t_ivac *ivac) {
 504
 505   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 506   fflush(NULL);
 507
 508   return SUCCESS;
 509 }
 510
 511 int ivac_display(t_display *display) {
 512
 513   int x,y;
 514
 515   /* display head */
 516   ivac_display_head(display);
 517
 518   /* display box */
 519   ivac_display_box(display);
 520
 521   /* display console */
 522   ivac_display_console(display);
 523
 524   /* display command prompt */
 525   ivac_display_prompt(display);
 526
 527   return SUCCESS;
 528 }
 529
 530 int ivac_display_content(t_ivac *ivac) {
 531
 532   /* display box content */
 533   ivac_display_box_content(ivac);
 534
 535   /* display console content */
 536   ivac_display_console_content(ivac);
 537
 538   /* display prompt content */
 539   ivac_display_prompt_content(ivac);
 540
 541   return SUCCESS;
 542 }
 543
 544 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 545
 546   int i;
 547
 548   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 549     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 550   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 551
 552   return SUCCESS;
 553 }