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   ivac_display(&ivac);
 134   ivac_display_draw(&ivac);
 135
 136   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
 137   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
 138
 139   return SUCCESS;
 140 }
 141
 142 int ivac_shutdown(t_ivac *ivac) {
 143
 144   network_shutdown(&(ivac->net));
 145   network_udp_shutdown(&(ivac->net));
 146   input_shutdown(&(ivac->input));
 147   event_stop(&(ivac->event));
 148   audio_shutdown(&(ivac->audio));
 149   display_shutdown(&(ivac->display));
 150
 151   return SUCCESS;
 152 }
 153
 154 int ivac_send_info(int channel,t_ivac *ivac) {
 155
 156   char data[SEND_N_MAX];
 157   int size;
 158
 159   size=strlen(ivac->username);
 160
 161   data[0]=IVAC_SEND_NAME;
 162   data[1]=size;
 163   strncpy(data+2,ivac->username,size);
 164   size+=2;
 165
 166   data[size]=IVAC_SEND_G_CAP;
 167   data[size+1]=1;
 168   data[size+2]=ivac->g_cap;
 169   size+=3;
 170
 171   data[size]=IVAC_SEND_AV_CAP;
 172   data[size+1]=2;
 173   data[size+2]=(ivac->av_cap)>>8;
 174   data[size+3]=(ivac->av_cap)&0xff;
 175   size+=4;
 176
 177   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
 178     puts("[ivac] ivac_send_info failed");
 179     return ERROR;
 180   }
 181
 182   return SUCCESS;
 183 }
 184
 185 int ivac_send_quit(int channel,t_ivac *ivac) {
 186
 187   char data[7]; /* one more for \0 */
 188
 189   data[0]=IVAC_SEND_QUIT;
 190   data[1]=4;
 191   strcpy(data+2,"quit");
 192
 193   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 194     puts("[ivac] ivac_send_quit failed");
 195     return ERROR;
 196   }
 197
 198   return SUCCESS;
 199 }
 200
 201 int ivac_receive_info(int channel,t_ivac *ivac) {
 202
 203   char data[SEND_N_MAX];
 204   char c_str[IVAC_CONSOLE_STRING_LEN];
 205   int count,length;
 206
 207   count=0;
 208
 209   if((length=network_receive(ivac->net.connection[channel].fd,
 210                              data,SEND_N_MAX))==N_ERROR) {
 211     puts("[ivac] ivac_receive_info failed");
 212     return ERROR;
 213   }
 214
 215   while(length-count) {
 216     switch(data[count]) {
 217       case IVAC_SEND_NAME:
 218         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 219         ivac->challenger[channel].name[data[count+1]]='\0';
 220         count+=(data[count+1]+2);
 221         break;
 222       case IVAC_SEND_G_CAP:
 223         ivac->challenger[channel].g_cap=data[count+2];
 224         count+=3;
 225         break;
 226       case IVAC_SEND_AV_CAP:
 227         ivac->challenger[channel].av_cap=data[count+2]<<8;
 228         ivac->challenger[channel].av_cap|=data[count+3];
 229         count+=4;
 230         break;
 231       case IVAC_SEND_QUIT:
 232         if(!(strncmp(data+count+2,"quit",data[1])))
 233           sprintf(c_str,"channel %02d: connection closed by remote host",
 234                   channel);
 235           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 236                      READ,REMOVE);
 237           network_close(&(ivac->net),channel);
 238           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 239           ivac_add_to_monitor(ivac,c_str);
 240           count+=6;
 241           break;
 242       default:
 243         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
 244                data[count]);
 245         ivac_add_to_monitor(ivac,c_str);
 246         return ERROR;
 247         break;
 248     }
 249   }
 250
 251   return length;
 252 }
 253
 254 int ivac_event_cb(t_event *event,void *ptr) {
 255
 256   t_ivac *ivac;
 257   int channel;
 258   char c_str[IVAC_CONSOLE_STRING_LEN];
 259
 260   ivac=(t_ivac *)ptr;
 261
 262   /* incoming connection -- first contact => send info */
 263   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 264     channel=network_manage_incoming(&(ivac->net));
 265     if(channel==N_E_ACCEPT)
 266       sprintf(c_str,"accept failed");
 267     else if(channel==N_E_MAXC)
 268       sprintf(c_str,"maximum connections reached");
 269     else {
 270       sprintf(c_str,"connection from %s port %d on channel %d",
 271               ivac->net.connection[channel].ip,
 272               ivac->net.connection[channel].port,channel);
 273       ivac_add_to_monitor(ivac,c_str);
 274       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 275       ivac_send_info(channel,ivac);
 276     }
 277     ivac_display_content(ivac);
 278     ivac_display_draw(ivac);
 279   }
 280
 281   /* wait for user info */
 282   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 283     if(ivac->net.connection[channel].status&C_ESTABL) {
 284       /* remote is sending info */
 285       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
 286         if(ivac_receive_info(channel,ivac)==0) {
 287           event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
 288           network_close(&(ivac->net),channel);
 289           sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
 290           ivac_add_to_monitor(ivac,c_str);
 291         }
 292         ivac_display_content(ivac);
 293         ivac_display_draw(ivac);
 294       }
 295     }
 296   }
 297
 298   /* user interaction */
 299   if(FD_ISSET(0,&(event->rfds)))
 300     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 301
 302   return SUCCESS;
 303 }
 304
 305 int ivac_regular_cb(t_event *event,void *ptr) {
 306
 307   /* usual jobs like audio & video transmit ... */
 308
 309   return SUCCESS;
 310 }
 311
 312 int ivac_parse_command(t_input *input,void *ptr) {
 313
 314   t_ivac *ivac;
 315   int i,j,k;
 316   int len;
 317   int channel;
 318   char *data,valid;
 319   char c_str[IVAC_CONSOLE_STRING_LEN];
 320   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 321
 322   ivac=(t_ivac *)ptr;
 323   data=input->content;
 324   valid=0;
 325
 326   /* refresh prompt content only */
 327   ivac_display_prompt_content(ivac);
 328
 329   /* parse command routines */
 330   if(data[input->c_count-1]=='\n') {
 331
 332     /* delete console string + args */
 333     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 334     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 335
 336     /* get args */
 337     len=0;
 338     while(data[len]!='\n') len++;
 339     i=0; j=0;
 340     while((i<len) && (j<IVAC_ARG_COUNT)) {
 341       k=0;
 342       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 343         arg[j][k]=data[i+k];
 344         k++;
 345       }
 346       arg[j][k]='\0';
 347       j++;
 348       /* skip all ' ' */
 349       while(data[i+k]==' ') k++;
 350       i+=k;
 351     }
 352
 353     /* parse command  aka arg[0] */
 354     if(!(strncmp(arg[0],"quit",4))) {
 355       valid=1;
 356       sprintf(c_str,"ivac shutdown ...");
 357       for(i=0;i<MAX_CONNECTIONS;i++) {
 358         if(ivac->net.connection[i].status&C_ESTABL) {
 359           ivac_send_quit(i,ivac);
 360           network_close(&(ivac->net),i);
 361         }
 362       }
 363       ivac_shutdown(ivac);
 364     }
 365     if(!(strncmp(arg[0],"set",3))) {
 366       valid=1;
 367       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 368       else channel=-1;
 369       if(!(strncmp(arg[1],"name",4))) {
 370         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 371         sprintf(c_str,"changed username to %s",ivac->username);
 372       }
 373       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 374         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 375         if(i==N_E_IN_USE)
 376           sprintf(c_str,"channel %02d: connection in use",channel);
 377         if(i==N_SUCCESS)
 378           sprintf(c_str,"channel %02d: set connection info",channel);
 379       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 380                       arg[1]);
 381     }
 382     if(!(strncmp(arg[0],"connect",7))) {
 383       valid=1;
 384       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 385       else channel=-1;
 386       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 387         i=network_connect(&(ivac->net),channel);
 388         if(i==N_E_IN_USE)
 389           sprintf(c_str,"channel %02d: connection in use",channel);
 390         else if(i==N_E_NO_INFO)
 391           sprintf(c_str,"channel %02d: channel not configured",channel);
 392         else {
 393           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 394                   ivac->net.connection[channel].ip,
 395                   ivac->net.connection[channel].port);
 396           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 397           ivac_send_info(channel,ivac);
 398         }
 399       }
 400       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 401     }
 402     if(!(strncmp(arg[0],"close",5))) {
 403       valid=1;
 404       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 405       else channel=-1;
 406       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 407         if(ivac->net.connection[channel].status&C_ESTABL) {
 408           ivac_send_quit(channel,ivac);
 409           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 410                      READ,REMOVE);
 411           network_close(&(ivac->net),channel);
 412           sprintf(c_str,"channel %02d: connection closed",channel);
 413           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 414         }
 415         else
 416           sprintf(c_str,"channel %02d: no active connection",channel);
 417       }
 418       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 419     }
 420     if(!(strncmp(arg[0],"select",6))) {
 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_select(&(ivac->net),channel);
 426         sprintf(c_str,"selected channel %d",channel);
 427       }
 428       else if(arg[1][0]='*') {
 429         network_select(&(ivac->net),MAX_CONNECTIONS);
 430         strcpy(c_str,"selected all channels");
 431       }
 432       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 433     }
 434     if(!(strncmp(arg[0],"deselect",8))) {
 435       valid=1;
 436       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 437       else channel=-1;
 438       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 439         network_deselect(&(ivac->net),channel);
 440         sprintf(c_str,"deselected channel %d",channel);
 441       }
 442       else if(arg[1][0]='*') {
 443         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 444         strcpy(c_str,"deselected all channels");
 445       }
 446       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 447     }
 448
 449     if(!valid)
 450       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 451
 452     /* call network functions */
 453     network_manage_connection(&(ivac->net));
 454
 455     /* add console string to console buffer */
 456     ivac_add_to_monitor(ivac,c_str);
 457
 458     /* refresh whole display content */
 459     ivac_display_content(ivac);
 460     ivac_display_draw(ivac);
 461
 462     /* delete content buffer + reset counter */
 463     memset(input->content,0,input->c_count-1);
 464     input->c_count=0;
 465
 466   }
 467
 468   return SUCCESS;
 469 }
 470
 471 int ivac_display_head(t_ivac *ivac) {
 472
 473   display_line(&(ivac->display),0,0,ivac->display.max_x,0,'#');
 474   display_string(&(ivac->display),(ivac->display.max_x-strlen(PROG_NAME))/2,1,
 475                  PROG_NAME,strlen(PROG_NAME));
 476   display_line(&(ivac->display),0,2,ivac->display.max_x,2,'#');
 477
 478   return SUCCESS;
 479 }
 480
 481 int ivac_display_box(t_ivac *ivac) {
 482
 483   display_line(&(ivac->display),0,3,ivac->display.max_x,3,'-');
 484   printf("username: %s, capabilities: %02x|%04x\n",ivac->username,ivac->g_cap,
 485                                                    ivac->av_cap);
 486   display_line(&(ivac->display),0,5,ivac->display.max_x,5,'-');
 487   display_string(&(ivac->display),0,6,"connections:",12);
 488   display_line(&(ivac->display),
 489                0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN-1,
 490                ivac->display.max_x,
 491                ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN-1,'-');
 492
 493   return SUCCESS;
 494 }
 495
 496 int ivac_display_box_content(t_ivac *ivac) {
 497
 498   int channel;
 499   char string[MAX_BOX_CHARS];
 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   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 507     if(ivac->net.connection[channel].status&C_INFO_A) {
 508       snprintf(string,MAX_BOX_CHARS,
 509                "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       display_string(&(ivac->display),0,IVAC_HEAD_LEN+4+channel,
 515                      string,strlen(string));
 516     }
 517   }
 518
 519   return SUCCESS;
 520 }
 521
 522 int ivac_display_console(t_ivac *ivac) {
 523
 524   display_string(&(ivac->display),
 525                  0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN,
 526                  "console messages:",17);
 527
 528   return SUCCESS;
 529 }
 530
 531 int ivac_display_console_content(t_ivac *ivac) {
 532
 533   int i;
 534   char string[IVAC_CONSOLE_STRING_LEN];
 535
 536   for(i=0;i<IVAC_CONSOLE_LEN;i++) {
 537     snprintf(string,IVAC_CONSOLE_STRING_LEN,"%s\n",ivac->console[i]);
 538     display_string(&(ivac->display),
 539                    0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN+1+i,
 540                    string,strlen(string));
 541   }
 542
 543   return SUCCESS;
 544 }
 545
 546 int ivac_display_prompt(t_ivac *ivac) {
 547
 548   /* simply a printf - dirty! */
 549   printf("prompt: ");
 550   fflush(NULL);
 551
 552   return SUCCESS;
 553 }
 554
 555 int ivac_display_prompt_content(t_ivac *ivac) {
 556
 557   /* simply a printf - dirty! */
 558   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 559   fflush(NULL);
 560
 561   return SUCCESS;
 562 }
 563
 564 int ivac_display_content(t_ivac *ivac) {
 565
 566   /* display box content */
 567   ivac_display_box_content(ivac);
 568
 569   /* display console content */
 570   ivac_display_console_content(ivac);
 571
 572   return SUCCESS;
 573 }
 574
 575 int ivac_display(t_ivac *ivac) {
 576
 577   int x,y;
 578
 579   /* display static head */
 580   ivac_display_head(ivac);
 581
 582   /* display static box */
 583   ivac_display_box(ivac);
 584
 585   /* display static console */
 586   ivac_display_console(ivac);
 587
 588   /* display command prompt */
 589   ivac_display_prompt(ivac);
 590
 591   return SUCCESS;
 592 }
 593
 594 int ivac_display_draw(t_ivac *ivac) {
 595
 596   display_draw_until_line(&(ivac->display),ivac->display.max_y-1);
 597   ivac_display_prompt(ivac);
 598
 599   return SUCCESS;
 600 }
 601
 602 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 603
 604   int i;
 605
 606   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 607     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 608   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 609
 610   return SUCCESS;
 611 }