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