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 #include "ivac.h"
  25
  26 int usage(void) {
  27
  28   puts("");
  29   puts("usage: ivac <options>");
  30   puts("");
  31   puts("options:");
  32   puts("-h \t\t show this help");
  33   puts("-n <name> \t specify your name");
  34   puts("-p <port> \t specify port to listen for incoming connections");
  35   puts("-u <port> \t specify udp data port");
  36   puts("-d <device> \t specify audio device");
  37   puts("");
  38
  39   return SUCCESS;
  40 }
  41
  42 int main(int argc,char **argv) {
  43
  44   /* TESTING BY NOW */
  45
  46   t_ivac ivac;
  47   int i;
  48
  49   /* default values */
  50   strcpy(ivac.username,"ivac");
  51   ivac.net.l_port=IVAC_LISTEN_PORT;
  52   ivac.net.l_udp_port=IVAC_UDP_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 'u':
  69           ivac.net.l_udp_port=atoi(argv[++i]);
  70           break;
  71         case 'd':
  72           strncpy(ivac.audio.dsp_dev,argv[++i],MAX_CHAR_DEVICE);
  73           break;
  74         default:
  75           usage();
  76           return ERROR;
  77       }
  78     }
  79     else usage();
  80   }
  81
  82   /* clear challenger struct */
  83   for(i=0;i<MAX_CONNECTIONS;i++)
  84     memset(&(ivac.challenger[i]),0,sizeof(t_challenger));
  85   /* zero console buffer */
  86   for(i=0;i<IVAC_CONSOLE_LEN;i++)
  87     memset(ivac.console[i],0,IVAC_CONSOLE_STRING_LEN);
  88
  89   /* set capabilities (futur: set by check routines) */
  90   ivac.g_cap=NETWORK;
  91   ivac.av_cap=AUDIO|VIDEO|DUPLEX;
  92
  93   /* set event timeout */
  94   ivac.event.timeout.tv_sec=IVAC_S_SEC;
  95   ivac.event.timeout.tv_usec=IVAC_S_USEC;
  96   /* event init */
  97   event_init(&(ivac.event));
  98
  99   /* input init */
 100   ivac.input.mode=CONTENT_BUFFER;
 101   input_init(&(ivac.input));
 102
 103   /* network init */
 104   if(network_init(&(ivac.net))==N_ERROR) {
 105     printf("[ivac] use 'fuser -n tcp %d' to determine the process to kill!\n",
 106            ivac.net.l_port);
 107     ivac_shutdown(&ivac);
 108     return ERROR;
 109   }
 110   network_udp_listen_init(&(ivac.net));
 111
 112   /* add listening port(s) + stdin to (read) event system */
 113   event_math(ivac.net.l_fd,&(ivac.event),READ,ADD);
 114   event_math(ivac.net.l_udp_fd,&(ivac.event),READ,ADD);
 115   event_math(0,&(ivac.event),READ,ADD);
 116
 117   /* display init */
 118   display_init(&(ivac.display));
 119
 120   /* use hardcoded audio settings by now */
 121   ivac.audio.fmt=BIT_8;
 122   ivac.audio.channels=MONO;
 123   ivac.audio.speed=8000;
 124   /* audio init */
 125   audio_init(&(ivac.audio));
 126   audio_setup(&(ivac.audio));
 127
 128   /* display */
 129   ivac_display(&(ivac.display));
 130
 131   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
 132   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
 133
 134   return SUCCESS;
 135 }
 136
 137 int ivac_shutdown(t_ivac *ivac) {
 138
 139   network_shutdown(&(ivac->net));
 140   network_udp_shutdown(&(ivac->net));
 141   input_shutdown(&(ivac->input));
 142   event_stop(&(ivac->event));
 143   audio_shutdown(&(ivac->audio));
 144   display_shutdown(&(ivac->display));
 145
 146   return SUCCESS;
 147 }
 148
 149 int ivac_send_info(int channel,t_ivac *ivac) {
 150
 151   char data[SEND_N_MAX];
 152   int size;
 153
 154   size=strlen(ivac->username);
 155
 156   data[0]=IVAC_SEND_NAME;
 157   data[1]=size;
 158   strncpy(data+2,ivac->username,size);
 159   size+=2;
 160
 161   data[size]=IVAC_SEND_G_CAP;
 162   data[size+1]=1;
 163   data[size+2]=ivac->g_cap;
 164   size+=3;
 165
 166   data[size]=IVAC_SEND_AV_CAP;
 167   data[size+1]=2;
 168   data[size+2]=(ivac->av_cap)>>8;
 169   data[size+3]=(ivac->av_cap)&0xff;
 170   size+=4;
 171
 172   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
 173     puts("[ivac] ivac_send_info failed");
 174     return ERROR;
 175   }
 176
 177   return SUCCESS;
 178 }
 179
 180 int ivac_send_quit(int channel,t_ivac *ivac) {
 181
 182   char data[7]; /* one more for \0 */
 183
 184   data[0]=IVAC_SEND_QUIT;
 185   data[1]=4;
 186   strcpy(data+2,"quit");
 187
 188   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 189     puts("[ivac] ivac_send_quit failed");
 190     return ERROR;
 191   }
 192
 193   return SUCCESS;
 194 }
 195
 196 int ivac_receive_info(int channel,t_ivac *ivac) {
 197
 198   char data[SEND_N_MAX];
 199   char c_str[IVAC_CONSOLE_STRING_LEN];
 200   int count,length;
 201
 202   count=0;
 203
 204   if((length=network_receive(ivac->net.connection[channel].fd,
 205                              data,SEND_N_MAX))==N_ERROR) {
 206     puts("[ivac] ivac_receive_info failed");
 207     return ERROR;
 208   }
 209
 210   while(length-count) {
 211     switch(data[count]) {
 212       case IVAC_SEND_NAME:
 213         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 214         ivac->challenger[channel].name[data[count+1]]='\0';
 215         count+=(data[count+1]+2);
 216         break;
 217       case IVAC_SEND_G_CAP:
 218         ivac->challenger[channel].g_cap=data[count+2];
 219         count+=3;
 220         break;
 221       case IVAC_SEND_AV_CAP:
 222         ivac->challenger[channel].av_cap=data[count+2]<<8;
 223         ivac->challenger[channel].av_cap|=data[count+3];
 224         count+=4;
 225         break;
 226       case IVAC_SEND_QUIT:
 227         if(!(strncmp(data+count+2,"quit",data[1])))
 228           sprintf(c_str,"channel %02d: connection closed by remote host",
 229                   channel);
 230           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 231                      READ,REMOVE);
 232           network_close(&(ivac->net),channel);
 233           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 234           ivac_add_to_monitor(ivac,c_str);
 235           count+=6;
 236           break;
 237       default:
 238         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
 239                data[count]);
 240         ivac_add_to_monitor(ivac,c_str);
 241         return ERROR;
 242         break;
 243     }
 244   }
 245
 246   return length;
 247 }
 248
 249 int ivac_event_cb(t_event *event,void *ptr) {
 250
 251   t_ivac *ivac;
 252   int channel;
 253   char c_str[IVAC_CONSOLE_STRING_LEN];
 254
 255   ivac=(t_ivac *)ptr;
 256
 257   /* incoming connection -- first contact => send info */
 258   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 259     channel=network_manage_incoming(&(ivac->net));
 260     if(channel==N_E_ACCEPT)
 261       sprintf(c_str,"accept failed");
 262     else if(channel==N_E_MAXC)
 263       sprintf(c_str,"maximum connections reached");
 264     else {
 265       sprintf(c_str,"connection from %s port %d on channel %d",
 266               ivac->net.connection[channel].ip,
 267               ivac->net.connection[channel].port,channel);
 268       ivac_add_to_monitor(ivac,c_str);
 269       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 270       ivac_send_info(channel,ivac);
 271     }
 272     ivac_display_content(ivac);
 273   }
 274
 275   /* wait for user info */
 276   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 277     if(ivac->net.connection[channel].status&C_ESTABL) {
 278       /* remote is sending info */
 279       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
 280         if(ivac_receive_info(channel,ivac)==0) {
 281           event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
 282           network_close(&(ivac->net),channel);
 283           sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
 284           ivac_add_to_monitor(ivac,c_str);
 285         }
 286         ivac_display_content(ivac);
 287       }
 288     }
 289   }
 290
 291   /* user interaction */
 292   if(FD_ISSET(0,&(event->rfds)))
 293     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 294
 295   return SUCCESS;
 296 }
 297
 298 int ivac_regular_cb(t_event *event,void *ptr) {
 299
 300   /* usual jobs like audio & video transmit ... */
 301
 302   return SUCCESS;
 303 }
 304
 305 int ivac_parse_command(t_input *input,void *ptr) {
 306
 307   t_ivac *ivac;
 308   int i,j,k;
 309   int len;
 310   int channel;
 311   char *data,valid;
 312   char c_str[IVAC_CONSOLE_STRING_LEN];
 313   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 314
 315   ivac=(t_ivac *)ptr;
 316   data=input->content;
 317   valid=0;
 318
 319   /* refresh prompt content only! */
 320   ivac_display_prompt_content(ivac);
 321
 322   /* parse command routines */
 323   if(data[input->c_count-1]=='\n') {
 324
 325     /* delete console string + args */
 326     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 327     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 328
 329     /* get args */
 330     len=0;
 331     while(data[len]!='\n') len++;
 332     i=0; j=0;
 333     while((i<len) && (j<IVAC_ARG_COUNT)) {
 334       k=0;
 335       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 336         arg[j][k]=data[i+k];
 337         k++;
 338       }
 339       arg[j][k]='\0';
 340       j++;
 341       /* skip all ' ' */
 342       while(data[i+k]==' ') k++;
 343       i+=k;
 344     }
 345
 346     /* parse command  aka arg[0] */
 347     if(!(strncmp(arg[0],"quit",4))) {
 348       valid=1;
 349       sprintf(c_str,"ivac shutdown ...");
 350       for(i=0;i<MAX_CONNECTIONS;i++) {
 351         if(ivac->net.connection[i].status&C_ESTABL) {
 352           ivac_send_quit(i,ivac);
 353           network_close(&(ivac->net),i);
 354         }
 355       }
 356       ivac_shutdown(ivac);
 357     }
 358     if(!(strncmp(arg[0],"set",3))) {
 359       valid=1;
 360       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 361       else channel=-1;
 362       if(!(strncmp(arg[1],"name",4))) {
 363         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 364         sprintf(c_str,"changed username to %s",ivac->username);
 365       }
 366       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 367         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 368         if(i==N_E_IN_USE)
 369           sprintf(c_str,"channel %02d: connection in use",channel);
 370         if(i==N_SUCCESS)
 371           sprintf(c_str,"channel %02d: set connection info",channel);
 372       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 373                       arg[1]);
 374     }
 375     if(!(strncmp(arg[0],"connect",7))) {
 376       valid=1;
 377       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 378       else channel=-1;
 379       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 380         i=network_connect(&(ivac->net),channel);
 381         if(i==N_E_IN_USE)
 382           sprintf(c_str,"channel %02d: connection in use",channel);
 383         else if(i==N_E_NO_INFO)
 384           sprintf(c_str,"channel %02d: channel not configured",channel);
 385         else {
 386           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 387                   ivac->net.connection[channel].ip,
 388                   ivac->net.connection[channel].port);
 389           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 390           ivac_send_info(channel,ivac);
 391         }
 392       }
 393       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 394     }
 395     if(!(strncmp(arg[0],"close",5))) {
 396       valid=1;
 397       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 398       else channel=-1;
 399       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 400         if(ivac->net.connection[channel].status&C_ESTABL) {
 401           ivac_send_quit(channel,ivac);
 402           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 403                      READ,REMOVE);
 404           network_close(&(ivac->net),channel);
 405           sprintf(c_str,"channel %02d: connection closed",channel);
 406           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 407         }
 408         else
 409           sprintf(c_str,"channel %02d: no active connection",channel);
 410       }
 411       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 412     }
 413     if(!(strncmp(arg[0],"select",6))) {
 414       valid=1;
 415       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 416       else channel=-1;
 417       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 418         network_select(&(ivac->net),channel);
 419         sprintf(c_str,"selected channel %d",channel);
 420       }
 421       else if(arg[1][0]='*') {
 422         network_select(&(ivac->net),MAX_CONNECTIONS);
 423         strcpy(c_str,"selected all channels");
 424       }
 425       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 426     }
 427     if(!(strncmp(arg[0],"deselect",8))) {
 428       valid=1;
 429       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 430       else channel=-1;
 431       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 432         network_deselect(&(ivac->net),channel);
 433         sprintf(c_str,"deselected channel %d",channel);
 434       }
 435       else if(arg[1][0]='*') {
 436         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 437         strcpy(c_str,"deselected all channels");
 438       }
 439       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 440     }
 441
 442     if(!valid)
 443       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 444
 445     /* call network functions */
 446     network_manage_connection(&(ivac->net));
 447
 448     /* add console string to console buffer */
 449     ivac_add_to_monitor(ivac,c_str);
 450
 451     /* refresh whole display content */
 452     ivac_display_content(ivac);
 453
 454     /* delete content buffer + reset counter */
 455     memset(input->content,0,input->c_count-1);
 456     input->c_count=0;
 457
 458   }
 459
 460   return SUCCESS;
 461 }
 462
 463 int ivac_display_head(t_display *display) {
 464
 465   puts("#########################################################");
 466   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
 467   puts("#########################################################");
 468
 469   return SUCCESS;
 470 }
 471
 472 int ivac_display_box(t_display *display) {
 473
 474   return SUCCESS;
 475 }
 476
 477 int ivac_display_box_content(t_ivac *ivac) {
 478
 479   int channel;
 480
 481   /* prepare challenger names */
 482   for(channel=0;channel<MAX_CONNECTIONS;channel++)
 483     if(ivac->challenger[channel].name[0]==0)
 484       strcpy(ivac->challenger[channel].name,"<empty>");
 485
 486   return SUCCESS;
 487 }
 488
 489 int ivac_display_console(t_display *display) {
 490
 491   return SUCCESS;
 492 }
 493
 494 int ivac_display_console_content(t_ivac *ivac) {
 495
 496   int i;
 497
 498   for(i=0;i<IVAC_CONSOLE_LEN;i++)
 499     printf("[ivac] console line %d: %s\n",i,ivac->console[i]);
 500
 501   return SUCCESS;
 502 }
 503
 504 int ivac_display_prompt(t_display *display) {
 505
 506   return SUCCESS;
 507 }
 508
 509 int ivac_display_prompt_content(t_ivac *ivac) {
 510
 511   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 512   fflush(NULL);
 513
 514   return SUCCESS;
 515 }
 516
 517 int ivac_display(t_display *display) {
 518
 519   int x,y;
 520
 521   /* display head */
 522   ivac_display_head(display);
 523
 524   /* display box */
 525   ivac_display_box(display);
 526
 527   /* display console */
 528   ivac_display_console(display);
 529
 530   /* display command prompt */
 531   ivac_display_prompt(display);
 532
 533   return SUCCESS;
 534 }
 535
 536 int ivac_display_content(t_ivac *ivac) {
 537
 538   /* display box content */
 539   ivac_display_box_content(ivac);
 540
 541   /* display console content */
 542   ivac_display_console_content(ivac);
 543
 544   /* display prompt content */
 545   ivac_display_prompt_content(ivac);
 546
 547   return SUCCESS;
 548 }
 549
 550 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 551
 552   int i;
 553
 554   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 555     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 556   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 557
 558   return SUCCESS;
 559 }