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("-i <iface> \t specify network interface");
  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   ivac.net.l_udp_port=IVAC_UDP_PORT;
  54   strcpy(ivac.audio.dsp_dev,SOUND_DEVICE);
  55   strcpy(ivac.net.nic,"eth0");
  56
  57   /* parse argv and change default values */
  58   for(i=1;i<argc;i++) {
  59     if(argv[i][0]=='-') {
  60       switch(argv[i][1]) {
  61         case 'h':
  62           usage();
  63           return SUCCESS;
  64         case 'n':
  65           strncpy(ivac.username,argv[++i],CHAR_USERNAME);
  66           break;
  67         case 'p':
  68           ivac.net.l_port=atoi(argv[++i]);
  69           break;
  70         case 'u':
  71           ivac.net.l_udp_port=atoi(argv[++i]);
  72           break;
  73         case 'd':
  74           strncpy(ivac.audio.dsp_dev,argv[++i],MAX_CHAR_DEVICE);
  75           break;
  76         case 'i':
  77           strncpy(ivac.net.nic,argv[++i],MAX_NIC_DEVICE);
  78         default:
  79           usage();
  80           return ERROR;
  81       }
  82     }
  83     else usage();
  84   }
  85
  86   /* clear challenger struct */
  87   for(i=0;i<MAX_CONNECTIONS;i++)
  88     memset(&(ivac.challenger[i]),0,sizeof(t_challenger));
  89   /* zero console buffer */
  90   for(i=0;i<IVAC_CONSOLE_LEN;i++)
  91     memset(ivac.console[i],0,IVAC_CONSOLE_STRING_LEN);
  92
  93   /* set capabilities (futur: set by check routines) */
  94   ivac.g_cap=NETWORK;
  95   ivac.av_cap=AUDIO|VIDEO|DUPLEX;
  96
  97   /* set event timeout */
  98   ivac.event.timeout.tv_sec=IVAC_S_SEC;
  99   ivac.event.timeout.tv_usec=IVAC_S_USEC;
 100   /* event init */
 101   event_init(&(ivac.event));
 102
 103   /* input init */
 104   ivac.input.mode=CONTENT_BUFFER;
 105   input_init(&(ivac.input));
 106
 107   /* network init */
 108   if(network_init(&(ivac.net))==N_ERROR) {
 109     printf("[ivac] use 'fuser -n tcp %d' to determine the process to kill!\n",
 110            ivac.net.l_port);
 111     ivac_shutdown(&ivac);
 112     return ERROR;
 113   }
 114   network_udp_listen_init(&(ivac.net));
 115
 116   /* add listening port(s) + stdin to (read) event system */
 117   event_math(ivac.net.l_fd,&(ivac.event),READ,ADD);
 118   event_math(ivac.net.l_udp_fd,&(ivac.event),READ,ADD);
 119   event_math(0,&(ivac.event),READ,ADD);
 120
 121   /* display init */
 122   display_init(&(ivac.display));
 123
 124   /* use hardcoded audio settings by now */
 125   ivac.audio.fmt=BIT_8;
 126   ivac.audio.channels=MONO;
 127   ivac.audio.speed=8000;
 128   /* audio init */
 129   audio_init(&(ivac.audio));
 130   audio_setup(&(ivac.audio));
 131
 132   /* display */
 133 #ifdef XXX_GUI
 134   /* "constant" graphics */
 135   ivac_display_head(&ivac);
 136   ivac_display_box(&ivac);
 137   ivac_display_console(&ivac);
 138 #endif
 139   ivac_display(&ivac);
 140
 141   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
 142   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
 143
 144   return SUCCESS;
 145 }
 146
 147 int ivac_shutdown(t_ivac *ivac) {
 148
 149   network_shutdown(&(ivac->net));
 150   network_udp_shutdown(&(ivac->net));
 151   input_shutdown(&(ivac->input));
 152   event_stop(&(ivac->event));
 153   audio_shutdown(&(ivac->audio));
 154   display_shutdown(&(ivac->display));
 155
 156   return SUCCESS;
 157 }
 158
 159 int ivac_send_info(int channel,t_ivac *ivac) {
 160
 161   char data[SEND_N_MAX];
 162   int size;
 163
 164   size=strlen(ivac->username);
 165
 166   data[0]=IVAC_SEND_NAME;
 167   data[1]=size;
 168   strncpy(data+2,ivac->username,size);
 169   size+=2;
 170
 171   data[size]=IVAC_SEND_G_CAP;
 172   data[size+1]=1;
 173   data[size+2]=ivac->g_cap;
 174   size+=3;
 175
 176   data[size]=IVAC_SEND_AV_CAP;
 177   data[size+1]=2;
 178   data[size+2]=(ivac->av_cap)>>8;
 179   data[size+3]=(ivac->av_cap)&0xff;
 180   size+=4;
 181
 182   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
 183     puts("[ivac] ivac_send_info failed");
 184     return ERROR;
 185   }
 186
 187   return SUCCESS;
 188 }
 189
 190 int ivac_send_quit(int channel,t_ivac *ivac) {
 191
 192   char data[7]; /* one more for \0 */
 193
 194   data[0]=IVAC_SEND_QUIT;
 195   data[1]=4;
 196   strcpy(data+2,"quit");
 197
 198   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 199     puts("[ivac] ivac_send_quit failed");
 200     return ERROR;
 201   }
 202
 203   return SUCCESS;
 204 }
 205
 206 int ivac_receive_info(int channel,t_ivac *ivac) {
 207
 208   char data[SEND_N_MAX];
 209   char c_str[IVAC_CONSOLE_STRING_LEN];
 210   int count,length;
 211
 212   count=0;
 213
 214   if((length=network_receive(ivac->net.connection[channel].fd,
 215                              data,SEND_N_MAX))==N_ERROR) {
 216     puts("[ivac] ivac_receive_info failed");
 217     return ERROR;
 218   }
 219
 220   while(length-count) {
 221     switch(data[count]) {
 222       case IVAC_SEND_NAME:
 223         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 224         ivac->challenger[channel].name[data[count+1]]='\0';
 225         count+=(data[count+1]+2);
 226         break;
 227       case IVAC_SEND_G_CAP:
 228         ivac->challenger[channel].g_cap=data[count+2];
 229         count+=3;
 230         break;
 231       case IVAC_SEND_AV_CAP:
 232         ivac->challenger[channel].av_cap=data[count+2]<<8;
 233         ivac->challenger[channel].av_cap|=data[count+3];
 234         count+=4;
 235         break;
 236       case IVAC_SEND_QUIT:
 237         if(!(strncmp(data+count+2,"quit",data[1])))
 238           sprintf(c_str,"channel %02d: connection closed by remote host",
 239                   channel);
 240           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 241                      READ,REMOVE);
 242           network_close(&(ivac->net),channel);
 243           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 244           ivac_add_to_monitor(ivac,c_str);
 245           count+=6;
 246           break;
 247       default:
 248         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
 249                data[count]);
 250         ivac_add_to_monitor(ivac,c_str);
 251         return ERROR;
 252         break;
 253     }
 254   }
 255
 256   return length;
 257 }
 258
 259 int ivac_event_cb(t_event *event,void *ptr) {
 260
 261   t_ivac *ivac;
 262   int channel;
 263   char c_str[IVAC_CONSOLE_STRING_LEN];
 264
 265   ivac=(t_ivac *)ptr;
 266
 267   /* incoming connection -- first contact => send info */
 268   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 269     channel=network_manage_incoming(&(ivac->net));
 270     if(channel==N_E_ACCEPT)
 271       sprintf(c_str,"accept failed");
 272     else if(channel==N_E_MAXC)
 273       sprintf(c_str,"maximum connections reached");
 274     else {
 275       sprintf(c_str,"connection from %s port %d on channel %d",
 276               ivac->net.connection[channel].ip,
 277               ivac->net.connection[channel].port,channel);
 278       ivac_add_to_monitor(ivac,c_str);
 279       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 280       ivac_send_info(channel,ivac);
 281     }
 282     ivac_display(ivac);
 283   }
 284
 285   /* wait for user info */
 286   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 287     if(ivac->net.connection[channel].status&C_ESTABL) {
 288       /* remote is sending info */
 289       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
 290         if(ivac_receive_info(channel,ivac)==0) {
 291           event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
 292           network_close(&(ivac->net),channel);
 293           sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
 294           ivac_add_to_monitor(ivac,c_str);
 295         }
 296         ivac_display(ivac);
 297       }
 298     }
 299   }
 300
 301   /* user interaction */
 302   if(FD_ISSET(0,&(event->rfds)))
 303     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 304
 305   return SUCCESS;
 306 }
 307
 308 int ivac_regular_cb(t_event *event,void *ptr) {
 309
 310   /* usual jobs like audio & video transmit ... */
 311
 312   return SUCCESS;
 313 }
 314
 315 int ivac_parse_command(t_input *input,void *ptr) {
 316
 317   t_ivac *ivac;
 318   int i,j,k;
 319   int len;
 320   int channel;
 321   char *data,valid;
 322   char c_str[IVAC_CONSOLE_STRING_LEN];
 323   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 324
 325   ivac=(t_ivac *)ptr;
 326   data=input->content;
 327   valid=0;
 328
 329   /* refresh prompt content only */
 330   ivac_display_prompt_content(ivac);
 331
 332   /* parse command routines */
 333   if(data[input->c_count-1]=='\n') {
 334
 335     /* delete console string + args */
 336     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 337     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 338
 339     /* get args */
 340     len=0;
 341     while(data[len]!='\n') len++;
 342     i=0; j=0;
 343     while((i<len) && (j<IVAC_ARG_COUNT)) {
 344       k=0;
 345       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 346         arg[j][k]=data[i+k];
 347         k++;
 348       }
 349       arg[j][k]='\0';
 350       j++;
 351       /* skip all ' ' */
 352       while(data[i+k]==' ') k++;
 353       i+=k;
 354     }
 355
 356     /* parse command  aka arg[0] */
 357     if(!(strncmp(arg[0],"quit",4))) {
 358       valid=1;
 359       sprintf(c_str,"ivac shutdown ...");
 360       for(i=0;i<MAX_CONNECTIONS;i++) {
 361         if(ivac->net.connection[i].status&C_ESTABL) {
 362           ivac_send_quit(i,ivac);
 363           network_close(&(ivac->net),i);
 364         }
 365       }
 366       ivac_shutdown(ivac);
 367     }
 368     if(!(strncmp(arg[0],"set",3))) {
 369       valid=1;
 370       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 371       else channel=-1;
 372       if(!(strncmp(arg[1],"name",4))) {
 373         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 374         sprintf(c_str,"changed username to %s",ivac->username);
 375       }
 376       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 377         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 378         if(i==N_E_IN_USE)
 379           sprintf(c_str,"channel %02d: connection in use",channel);
 380         if(i==N_SUCCESS)
 381           sprintf(c_str,"channel %02d: set connection info",channel);
 382       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 383                       arg[1]);
 384     }
 385     if(!(strncmp(arg[0],"connect",7))) {
 386       valid=1;
 387       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 388       else channel=-1;
 389       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 390         i=network_connect(&(ivac->net),channel);
 391         if(i==N_E_IN_USE)
 392           sprintf(c_str,"channel %02d: connection in use",channel);
 393         else if(i==N_E_NO_INFO)
 394           sprintf(c_str,"channel %02d: channel not configured",channel);
 395         else {
 396           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 397                   ivac->net.connection[channel].ip,
 398                   ivac->net.connection[channel].port);
 399           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 400           ivac_send_info(channel,ivac);
 401         }
 402       }
 403       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 404     }
 405     if(!(strncmp(arg[0],"close",5))) {
 406       valid=1;
 407       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 408       else channel=-1;
 409       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 410         if(ivac->net.connection[channel].status&C_ESTABL) {
 411           ivac_send_quit(channel,ivac);
 412           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 413                      READ,REMOVE);
 414           network_close(&(ivac->net),channel);
 415           sprintf(c_str,"channel %02d: connection closed",channel);
 416           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 417         }
 418         else
 419           sprintf(c_str,"channel %02d: no active connection",channel);
 420       }
 421       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 422     }
 423     if(!(strncmp(arg[0],"select",6))) {
 424       valid=1;
 425       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 426       else channel=-1;
 427       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 428         network_select(&(ivac->net),channel);
 429         sprintf(c_str,"selected channel %d",channel);
 430       }
 431       else if(arg[1][0]='*') {
 432         network_select(&(ivac->net),MAX_CONNECTIONS);
 433         strcpy(c_str,"selected all channels");
 434       }
 435       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 436     }
 437     if(!(strncmp(arg[0],"deselect",8))) {
 438       valid=1;
 439       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 440       else channel=-1;
 441       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 442         network_deselect(&(ivac->net),channel);
 443         sprintf(c_str,"deselected channel %d",channel);
 444       }
 445       else if(arg[1][0]='*') {
 446         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 447         strcpy(c_str,"deselected all channels");
 448       }
 449       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 450     }
 451
 452     if(!valid)
 453       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 454
 455     /* call network functions */
 456     network_manage_connection(&(ivac->net));
 457
 458     /* add console string to console buffer */
 459     ivac_add_to_monitor(ivac,c_str);
 460
 461     /* refresh whole display content */
 462     ivac_display(ivac);
 463
 464     /* delete content buffer + reset counter */
 465     memset(input->content,0,input->c_count-1);
 466     input->c_count=0;
 467
 468   }
 469
 470   return SUCCESS;
 471 }
 472
 473 int ivac_display_head(t_ivac *ivac) {
 474
 475 #ifndef XXX_GUI
 476   display_term_line(&(ivac->display),'#');
 477   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
 478   puts("#########################################################");
 479 #endif
 480
 481   return SUCCESS;
 482 }
 483
 484 int ivac_display_box(t_ivac *ivac) {
 485
 486 #ifndef XXX_GUI
 487   puts("---------------------------------------------------------------------");
 488   printf("username: %s, capabilities: %02x|%04x\n",ivac->username,ivac->g_cap,
 489                                                    ivac->av_cap);
 490   puts("---------------------------------------------------------------------");
 491   puts("connections:");
 492 #endif
 493
 494   return SUCCESS;
 495 }
 496
 497 int ivac_display_box_content(t_ivac *ivac) {
 498
 499   int channel;
 500
 501   /* prepare challenger names */
 502   for(channel=0;channel<MAX_CONNECTIONS;channel++)
 503     if(ivac->challenger[channel].name[0]==0)
 504       strcpy(ivac->challenger[channel].name,"<empty>");
 505
 506 #ifndef XXX_GUI
 507   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 508     if(ivac->net.connection[channel].status&C_INFO_A)
 509       printf("channel %02d: %s:%d, status: %02x, name: %s\n",channel,
 510              ivac->net.connection[channel].ip,
 511              ivac->net.connection[channel].port,
 512              ivac->net.connection[channel].status,
 513              ivac->challenger[channel].name);
 514   }
 515 #endif
 516
 517   return SUCCESS;
 518 }
 519
 520 int ivac_display_console(t_ivac *ivac) {
 521
 522 #ifndef XXX_GUI
 523   puts("---------------------------------------------------------------------");
 524   puts("console messages:");
 525 #endif
 526
 527   return SUCCESS;
 528 }
 529
 530 int ivac_display_console_content(t_ivac *ivac) {
 531
 532   int i;
 533
 534 #ifndef XXX_GUI
 535   for(i=0;i<IVAC_CONSOLE_LEN;i++)
 536     printf("| %s\n",ivac->console[i]);
 537 #endif
 538
 539   return SUCCESS;
 540 }
 541
 542 int ivac_display_prompt(t_ivac *ivac) {
 543
 544 #ifndef XXX_GUI
 545   puts("---------------------------------------------------------------------");
 546   printf("prompt: ");
 547 #endif
 548
 549   return SUCCESS;
 550 }
 551
 552 int ivac_display_prompt_content(t_ivac *ivac) {
 553
 554 #ifndef XXX_GUI
 555   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 556   fflush(NULL);
 557 #endif
 558
 559   return SUCCESS;
 560 }
 561
 562 int ivac_display(t_ivac *ivac) {
 563
 564   int x,y;
 565
 566 #ifndef XXX_GUI
 567   /* display head */
 568   ivac_display_head(ivac);
 569
 570   /* display box */
 571   ivac_display_box(ivac);
 572 #endif
 573   ivac_display_box_content(ivac);
 574
 575 #ifndef XXX_GUI
 576   /* display console */
 577   ivac_display_console(ivac);
 578 #endif
 579   ivac_display_console_content(ivac);
 580
 581 #ifndef XXX_GUI
 582   /* display command prompt */
 583   ivac_display_prompt(ivac);
 584 #endif
 585   fflush(NULL);
 586
 587   return SUCCESS;
 588 }
 589
 590 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 591
 592   int i;
 593
 594   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 595     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 596   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 597
 598   return SUCCESS;
 599 }