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
 122   /* display */
 123   ivac_display(&(ivac.display));
 124
 125   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
 126   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
 127
 128   return SUCCESS;
 129 }
 130
 131 int ivac_shutdown(t_ivac *ivac) {
 132
 133   network_shutdown(&(ivac->net));
 134   input_shutdown(&(ivac->input));
 135   event_stop(&(ivac->event));
 136   audio_shutdown(&(ivac->audio));
 137   display_shutdown(&(ivac->display));
 138
 139   return SUCCESS;
 140 }
 141
 142 int ivac_send_info(int channel,t_ivac *ivac) {
 143
 144   char data[SEND_N_MAX];
 145   int size;
 146
 147   size=strlen(ivac->username);
 148
 149   data[0]=IVAC_SEND_NAME;
 150   data[1]=size;
 151   strncpy(data+2,ivac->username,size);
 152   size+=2;
 153
 154   data[size]=IVAC_SEND_G_CAP;
 155   data[size+1]=1;
 156   data[size+2]=ivac->g_cap;
 157   size+=3;
 158
 159   data[size]=IVAC_SEND_AV_CAP;
 160   data[size+1]=2;
 161   data[size+2]=(ivac->av_cap)>>8;
 162   data[size+3]=(ivac->av_cap)&0xff;
 163   size+=4;
 164
 165   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
 166     puts("[ivac] ivac_send_info failed");
 167     return ERROR;
 168   }
 169
 170   return SUCCESS;
 171 }
 172
 173 int ivac_send_quit(int channel,t_ivac *ivac) {
 174
 175   char data[7]; /* one more for \0 */
 176
 177   data[0]=IVAC_SEND_QUIT;
 178   data[1]=4;
 179   strcpy(data+2,"quit");
 180
 181   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 182     puts("[ivac] ivac_send_quit failed");
 183     return ERROR;
 184   }
 185
 186   return SUCCESS;
 187 }
 188
 189 int ivac_receive_info(int channel,t_ivac *ivac) {
 190
 191   char data[SEND_N_MAX];
 192   char c_str[IVAC_CONSOLE_STRING_LEN];
 193   int count,length;
 194
 195   count=0;
 196
 197   if((length=network_receive(ivac->net.connection[channel].fd,
 198                              data,SEND_N_MAX))==N_ERROR) {
 199     puts("[ivac] ivac_receive_info failed");
 200     return ERROR;
 201   }
 202
 203   while(length-count) {
 204     switch(data[count]) {
 205       case IVAC_SEND_NAME:
 206         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 207         ivac->challenger[channel].name[data[count+1]]='\0';
 208         count+=(data[count+1]+2);
 209         break;
 210       case IVAC_SEND_G_CAP:
 211         ivac->challenger[channel].g_cap=data[count+2];
 212         count+=3;
 213         break;
 214       case IVAC_SEND_AV_CAP:
 215         ivac->challenger[channel].av_cap=data[count+2]<<8;
 216         ivac->challenger[channel].av_cap|=data[count+3];
 217         count+=4;
 218         break;
 219       case IVAC_SEND_QUIT:
 220         if(!(strncmp(data+count+2,"quit",data[1])))
 221           sprintf(c_str,"channel %02d: connection closed by remote host",
 222                   channel);
 223           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 224                      READ,REMOVE);
 225           network_close(&(ivac->net),channel);
 226           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 227           ivac_add_to_monitor(ivac,c_str);
 228           count+=6;
 229           break;
 230       default:
 231         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
 232                data[count]);
 233         ivac_add_to_monitor(ivac,c_str);
 234         return ERROR;
 235         break;
 236     }
 237   }
 238
 239   return length;
 240 }
 241
 242 int ivac_event_cb(t_event *event,void *ptr) {
 243
 244   t_ivac *ivac;
 245   int channel;
 246   char c_str[IVAC_CONSOLE_STRING_LEN];
 247
 248   ivac=(t_ivac *)ptr;
 249
 250   /* incoming connection -- first contact => send info */
 251   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 252     channel=network_manage_incoming(&(ivac->net));
 253     if(channel==N_E_ACCEPT)
 254       sprintf(c_str,"accept failed");
 255     else if(channel==N_E_MAXC)
 256       sprintf(c_str,"maximum connections reached");
 257     else {
 258       sprintf(c_str,"connection from %s port %d on channel %d",
 259               ivac->net.connection[channel].ip,
 260               ivac->net.connection[channel].port,channel);
 261       ivac_add_to_monitor(ivac,c_str);
 262       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 263       ivac_send_info(channel,ivac);
 264     }
 265     ivac_display_content(ivac);
 266   }
 267
 268   /* wait for user info */
 269   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 270     if(ivac->net.connection[channel].status&C_ESTABL) {
 271       /* remote is sending info */
 272       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
 273         if(ivac_receive_info(channel,ivac)==0) {
 274           event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
 275           network_close(&(ivac->net),channel);
 276           sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
 277           ivac_add_to_monitor(ivac,c_str);
 278         }
 279         ivac_display_content(ivac);
 280       }
 281     }
 282   }
 283
 284   /* user interaction */
 285   if(FD_ISSET(0,&(event->rfds)))
 286     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 287
 288   return SUCCESS;
 289 }
 290
 291 int ivac_regular_cb(t_event *event,void *ptr) {
 292
 293   /* usual jobs like audio & video transmit ... */
 294
 295   return SUCCESS;
 296 }
 297
 298 int ivac_parse_command(t_input *input,void *ptr) {
 299
 300   t_ivac *ivac;
 301   int i,j,k;
 302   int len;
 303   int channel;
 304   char *data,valid;
 305   char c_str[IVAC_CONSOLE_STRING_LEN];
 306   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 307
 308   ivac=(t_ivac *)ptr;
 309   data=input->content;
 310   valid=0;
 311
 312   /* refresh prompt content only! */
 313   ivac_display_prompt_content(ivac);
 314
 315   /* parse command routines */
 316   if(data[input->c_count-1]=='\n') {
 317
 318     /* delete console string + args */
 319     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 320     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 321
 322     /* get args */
 323     len=0;
 324     while(data[len]!='\n') len++;
 325     i=0; j=0;
 326     while((i<len) && (j<IVAC_ARG_COUNT)) {
 327       k=0;
 328       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 329         arg[j][k]=data[i+k];
 330         k++;
 331       }
 332       arg[j][k]='\0';
 333       j++;
 334       /* skip all ' ' */
 335       while(data[i+k]==' ') k++;
 336       i+=k;
 337     }
 338
 339     /* parse command  aka arg[0] */
 340     if(!(strncmp(arg[0],"quit",4))) {
 341       valid=1;
 342       sprintf(c_str,"ivac shutdown ...");
 343       for(i=0;i<MAX_CONNECTIONS;i++) {
 344         if(ivac->net.connection[i].status&C_ESTABL) {
 345           ivac_send_quit(i,ivac);
 346           network_close(&(ivac->net),i);
 347         }
 348       }
 349       ivac_shutdown(ivac);
 350     }
 351     if(!(strncmp(arg[0],"set",3))) {
 352       valid=1;
 353       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 354       else channel=-1;
 355       if(!(strncmp(arg[1],"name",4))) {
 356         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 357         sprintf(c_str,"changed username to %s",ivac->username);
 358       }
 359       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 360         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 361         if(i==N_E_IN_USE)
 362           sprintf(c_str,"channel %02d: connection in use",channel);
 363         if(i==N_SUCCESS)
 364           sprintf(c_str,"channel %02d: set connection info",channel);
 365       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 366                       arg[1]);
 367     }
 368     if(!(strncmp(arg[0],"connect",7))) {
 369       valid=1;
 370       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 371       else channel=-1;
 372       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 373         i=network_connect(&(ivac->net),channel);
 374         if(i==N_E_IN_USE)
 375           sprintf(c_str,"channel %02d: connection in use",channel);
 376         else if(i==N_E_NO_INFO)
 377           sprintf(c_str,"channel %02d: channel not configured",channel);
 378         else {
 379           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 380                   ivac->net.connection[channel].ip,
 381                   ivac->net.connection[channel].port);
 382           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 383           ivac_send_info(channel,ivac);
 384         }
 385       }
 386       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 387     }
 388     if(!(strncmp(arg[0],"close",5))) {
 389       valid=1;
 390       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 391       else channel=-1;
 392       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 393         if(ivac->net.connection[channel].status&C_ESTABL) {
 394           ivac_send_quit(channel,ivac);
 395           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 396                      READ,REMOVE);
 397           network_close(&(ivac->net),channel);
 398           sprintf(c_str,"channel %02d: connection closed",channel);
 399           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 400         }
 401         else
 402           sprintf(c_str,"channel %02d: no active connection",channel);
 403       }
 404       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 405     }
 406     if(!(strncmp(arg[0],"select",6))) {
 407       valid=1;
 408       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 409       else channel=-1;
 410       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 411         network_select(&(ivac->net),channel);
 412         sprintf(c_str,"selected channel %d",channel);
 413       }
 414       else if(arg[1][0]='*') {
 415         network_select(&(ivac->net),MAX_CONNECTIONS);
 416         strcpy(c_str,"selected all channels");
 417       }
 418       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 419     }
 420     if(!(strncmp(arg[0],"deselect",8))) {
 421       valid=1;
 422       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 423       else channel=-1;
 424       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 425         network_deselect(&(ivac->net),channel);
 426         sprintf(c_str,"deselected channel %d",channel);
 427       }
 428       else if(arg[1][0]='*') {
 429         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 430         strcpy(c_str,"deselected all channels");
 431       }
 432       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 433     }
 434
 435     if(!valid)
 436       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 437
 438     /* call network functions */
 439     network_manage_connection(&(ivac->net));
 440
 441     /* add console string to console buffer */
 442     ivac_add_to_monitor(ivac,c_str);
 443
 444     /* refresh whole display content */
 445     ivac_display_content(ivac);
 446
 447     /* delete content buffer + reset counter */
 448     memset(input->content,0,input->c_count-1);
 449     input->c_count=0;
 450
 451   }
 452
 453   return SUCCESS;
 454 }
 455
 456 int ivac_display_head(t_display *display) {
 457
 458   puts("#########################################################");
 459   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
 460   puts("#########################################################");
 461
 462   return SUCCESS;
 463 }
 464
 465 int ivac_display_box(t_display *display) {
 466
 467   return SUCCESS;
 468 }
 469
 470 int ivac_display_box_content(t_ivac *ivac) {
 471
 472   int channel;
 473
 474   /* prepare challenger names */
 475   for(channel=0;channel<MAX_CONNECTIONS;channel++)
 476     if(ivac->challenger[channel].name[0]==0)
 477       strcpy(ivac->challenger[channel].name,"<empty>");
 478
 479   return SUCCESS;
 480 }
 481
 482 int ivac_display_console(t_display *display) {
 483
 484   return SUCCESS;
 485 }
 486
 487 int ivac_display_console_content(t_ivac *ivac) {
 488
 489   int i;
 490
 491   for(i=0;i<IVAC_CONSOLE_LEN;i++)
 492     printf("[ivac] console line %d: %s\n",i,ivac->console[i]);
 493
 494   return SUCCESS;
 495 }
 496
 497 int ivac_display_prompt(t_display *display) {
 498
 499   return SUCCESS;
 500 }
 501
 502 int ivac_display_prompt_content(t_ivac *ivac) {
 503
 504   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 505   fflush(NULL);
 506
 507   return SUCCESS;
 508 }
 509
 510 int ivac_display(t_display *display) {
 511
 512   int x,y;
 513
 514   /* display head */
 515   ivac_display_head(display);
 516
 517   /* display box */
 518   ivac_display_box(display);
 519
 520   /* display console */
 521   ivac_display_console(display);
 522
 523   /* display command prompt */
 524   ivac_display_prompt(display);
 525
 526   return SUCCESS;
 527 }
 528
 529 int ivac_display_content(t_ivac *ivac) {
 530
 531   /* display box content */
 532   ivac_display_box_content(ivac);
 533
 534   /* display console content */
 535   ivac_display_console_content(ivac);
 536
 537   /* display prompt content */
 538   ivac_display_prompt_content(ivac);
 539
 540   return SUCCESS;
 541 }
 542
 543 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 544
 545   int i;
 546
 547   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 548     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 549   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 550
 551   return SUCCESS;
 552 }