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_send_quit(int channel,t_ivac *ivac) {
 133
 134   char data[6];
 135
 136   data[0]=IVAC_SEND_QUIT;
 137   data[1]=4;
 138   strcpy(data+2,"quit");
 139
 140   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
 141     puts("[ivac] ivac_send_quit failed");
 142     return ERROR;
 143   }
 144
 145   return SUCCESS;
 146 }
 147
 148 int ivac_receive_info(int channel,t_ivac *ivac) {
 149
 150   char data[SEND_N_MAX];
 151   int count,length;
 152
 153   count=0;
 154
 155   if((length=network_receive(ivac->net.connection[channel].fd,
 156                              data,SEND_N_MAX))==N_ERROR) {
 157     puts("[ivac] ivac_receive_info failed");
 158     return ERROR;
 159   }
 160
 161   while(length-count) {
 162     switch(data[count]) {
 163       case IVAC_SEND_NAME:
 164         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
 165         ivac->challenger[channel].name[data[count+1]]='\0';
 166         count+=(data[count+1]+2);
 167         break;
 168       case IVAC_SEND_G_CAP:
 169         ivac->challenger[channel].g_cap=data[count+2];
 170         count+=3;
 171         break;
 172       case IVAC_SEND_AV_CAP:
 173         ivac->challenger[channel].av_cap=data[count+2]<<8;
 174         ivac->challenger[channel].av_cap|=data[count+3];
 175         count+=4;
 176         break;
 177       case IVAC_SEND_QUIT:
 178         if(!(strncmp(data+count+2,"quit",data[1])))
 179           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 180                      READ,REMOVE);
 181           network_close(&(ivac->net),channel);
 182           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 183       default:
 184         puts("[ivac] ivac_receive_info, unknown character");
 185         return ERROR;
 186         break;
 187     }
 188   }
 189
 190   return SUCCESS;
 191 }
 192
 193 int ivac_event_cb(t_event *event,void *ptr) {
 194
 195   t_ivac *ivac;
 196   int channel;
 197   char c_str[IVAC_CONSOLE_STRING_LEN];
 198
 199   ivac=(t_ivac *)ptr;
 200
 201   /* incoming connection -- first contact => send info */
 202   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
 203     channel=network_manage_incoming(&(ivac->net));
 204     if(channel==N_E_ACCEPT)
 205       sprintf(c_str,"accept failed");
 206     else if(channel==N_E_MAXC)
 207       sprintf(c_str,"maximum connections reached");
 208     else {
 209       sprintf(c_str,"connection from %s port %d on channel %d",
 210               ivac->net.connection[channel].ip,
 211               ivac->net.connection[channel].port,channel);
 212       ivac_add_to_monitor(ivac,c_str);
 213       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
 214       ivac_send_info(channel,ivac);
 215     }
 216     ivac_display_content(ivac);
 217   }
 218
 219   /* wait for user info */
 220   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 221     if(ivac->net.connection[channel].status&C_ESTABL) {
 222       /* remote is sending info */
 223       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds)))
 224         ivac_receive_info(channel,ivac);
 225         // ivac_display_content(ivac);
 226     }
 227   }
 228
 229   /* user interaction */
 230   if(FD_ISSET(0,&(event->rfds)))
 231     input_get_event(&(ivac->input),ivac_parse_command,ivac);
 232
 233   return SUCCESS;
 234 }
 235
 236 int ivac_regular_cb(t_event *event,void *ptr) {
 237
 238   /* usual jobs like audio & video transmit ... */
 239
 240   return SUCCESS;
 241 }
 242
 243 int ivac_parse_command(t_input *input,void *ptr) {
 244
 245   t_ivac *ivac;
 246   int i,j,k;
 247   int len;
 248   int channel;
 249   char *data,valid;
 250   char c_str[IVAC_CONSOLE_STRING_LEN];
 251   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
 252
 253   ivac=(t_ivac *)ptr;
 254   data=input->content;
 255   valid=0;
 256
 257   /* refresh prompt content only! */
 258   ivac_display_prompt_content(ivac);
 259
 260   /* parse command routines */
 261   if(data[input->c_count-1]=='\n') {
 262
 263     /* delete console string + args */
 264     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
 265     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
 266
 267     /* get args */
 268     len=0;
 269     while(data[len]!='\n') len++;
 270     i=0; j=0;
 271     while((i<len) && (j<IVAC_ARG_COUNT)) {
 272       k=0;
 273       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
 274         arg[j][k]=data[i+k];
 275         k++;
 276       }
 277       arg[j][k]='\0';
 278       j++;
 279       /* skip all ' ' */
 280       while(data[i+k]==' ') k++;
 281       i+=k;
 282     }
 283
 284     /* parse command  aka arg[0] */
 285     if(!(strncmp(arg[0],"quit",4))) {
 286       valid=1;
 287       sprintf(c_str,"ivac shutdown ...");
 288       ivac_shutdown(ivac);
 289     }
 290     if(!(strncmp(arg[0],"set",3))) {
 291       valid=1;
 292       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 293       else channel=-1;
 294       if(!(strncmp(arg[1],"name",4))) {
 295         strncpy(ivac->username,arg[2],CHAR_USERNAME);
 296         sprintf(c_str,"changed username to %s",ivac->username);
 297       }
 298       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 299         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
 300         if(i==N_E_IN_USE)
 301           sprintf(c_str,"channel %02d: connection in use",channel);
 302         if(i==N_SUCCESS)
 303           sprintf(c_str,"channel %02d: set connection info",channel);
 304       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
 305                       arg[1]);
 306     }
 307     if(!(strncmp(arg[0],"connect",7))) {
 308       valid=1;
 309       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 310       else channel=-1;
 311       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 312         i=network_connect(&(ivac->net),channel);
 313         if(i==N_E_IN_USE)
 314           sprintf(c_str,"channel %02d: connection in use",channel);
 315         else if(i==N_E_NO_INFO)
 316           sprintf(c_str,"channel %02d: channel not configured",channel);
 317         else {
 318           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
 319                   ivac->net.connection[channel].ip,
 320                   ivac->net.connection[channel].port);
 321           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
 322           ivac_send_info(channel,ivac);
 323         }
 324       }
 325       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 326     }
 327     if(!(strncmp(arg[0],"close",5))) {
 328       valid=1;
 329       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 330       else channel=-1;
 331       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 332         if(ivac->net.connection[channel].status&C_ESTABL) {
 333           ivac_send_quit(channel,ivac);
 334           event_math(ivac->net.connection[channel].fd,&(ivac->event),
 335                      READ,REMOVE);
 336           network_close(&(ivac->net),channel);
 337           sprintf(c_str,"channel %02d: connection closed",channel);
 338           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
 339         }
 340         else
 341           sprintf(c_str,"channel %02d: no active connection",channel);
 342       }
 343       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 344     }
 345     if(!(strncmp(arg[0],"select",6))) {
 346       valid=1;
 347       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 348       else channel=-1;
 349       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 350         network_select(&(ivac->net),channel);
 351         sprintf(c_str,"selected channel %d",channel);
 352       }
 353       else if(arg[1][0]='*') {
 354         network_select(&(ivac->net),MAX_CONNECTIONS);
 355         strcpy(c_str,"selected all channels");
 356       }
 357       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 358     }
 359     if(!(strncmp(arg[0],"deselect",8))) {
 360       valid=1;
 361       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
 362       else channel=-1;
 363       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
 364         network_deselect(&(ivac->net),channel);
 365         sprintf(c_str,"deselected channel %d",channel);
 366       }
 367       else if(arg[1][0]='*') {
 368         network_deselect(&(ivac->net),MAX_CONNECTIONS);
 369         strcpy(c_str,"deselected all channels");
 370       }
 371       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
 372     }
 373
 374     if(!valid)
 375       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
 376
 377     /* call network functions */
 378     network_manage_connection(&(ivac->net));
 379
 380     /* add console string to console buffer */
 381     ivac_add_to_monitor(ivac,c_str);
 382
 383     /* refresh whole display content */
 384     ivac_display_content(ivac);
 385
 386     /* delete content buffer + reset counter */
 387     memset(input->content,0,input->c_count-1);
 388     input->c_count=0;
 389
 390   }
 391
 392   return SUCCESS;
 393 }
 394
 395 int ivac_display_head(t_display *display) {
 396
 397 #ifdef USE_NCURSES
 398   int x,y;
 399
 400   move(0,0);
 401   for(x=0;x<display->max_x;x++) addch('#');
 402   mvaddstr(1,0,"##");
 403   mvaddstr(1,(display->max_x-4)/2-4,"- ivac -");
 404   mvaddstr(1,(display->max_x-2),"##");
 405   move(2,0);
 406   for(x=0;x<display->max_x;x++) addch('#');
 407   refresh();
 408 #else
 409   puts("#########################################################");
 410   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
 411   puts("#########################################################");
 412 #endif
 413
 414   return SUCCESS;
 415 }
 416
 417 int ivac_display_box(t_display *display) {
 418
 419 #ifdef USE_NCURSES
 420   int x,y;
 421
 422   for(y=IVAC_PROMPT_LEN;y<display->max_y-IVAC_PROMPT_LEN;y++) {
 423     mvaddch(y,0,'#');
 424     mvaddch(y,display->max_x-1,'#');
 425   }
 426 #endif
 427
 428   return SUCCESS;
 429 }
 430
 431 int ivac_display_box_content(t_ivac *ivac) {
 432
 433   int channel;
 434
 435   /* prepare challenger names */
 436   for(channel=0;channel<MAX_CONNECTIONS;channel++)
 437     if(ivac->challenger[channel].name[0]==0)
 438       strcpy(ivac->challenger[channel].name,"<empty>");
 439
 440 #ifdef USE_NCURSES
 441 #else
 442   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
 443     if(ivac->net.connection[channel].status&C_INFO_A)
 444       printf("channel %02d: ip:%s port:%d status: %02x - name: %s\n",channel,
 445              ivac->net.connection[channel].ip,
 446              ivac->net.connection[channel].port,
 447              ivac->net.connection[channel].status,
 448              ivac->challenger[channel].name);
 449   }
 450 #endif
 451
 452   return SUCCESS;
 453 }
 454
 455 int ivac_display_console(t_display *display) {
 456
 457 #ifdef USE_NCURSES
 458   int x,y;
 459
 460   move(display->max_y-IVAC_CONSOLE_LEN-IVAC_PROMPT_LEN-1,0);
 461   for(x=0;x<display->max_x;x++) addch('#');
 462 #endif
 463
 464   return SUCCESS;
 465 }
 466
 467 int ivac_display_console_content(t_ivac *ivac) {
 468
 469 #ifdef USE_NCURSES
 470   int x,y;
 471   int len;
 472
 473   for(y=0;y<IVAC_CONSOLE_LEN;y++) {
 474     len=strlen(ivac->console[y]);
 475     move(ivac->display.max_y-IVAC_CONSOLE_LEN-IVAC_PROMPT_LEN+y,2);
 476     for(x=0;x<len;x++)
 477        addch(((ivac->console[y][x]>' ')||(ivac->console[y][x]<='~'))
 478                ?ivac->console[y][x]:' ');
 479     for(x=len;x<IVAC_CONSOLE_STRING_LEN-4;x++) addch(' ');
 480   }
 481   refresh();
 482 #else
 483   int i;
 484
 485   for(i=0;i<IVAC_CONSOLE_LEN;i++)
 486     printf("[ivac] console line %d: %s\n",i,ivac->console[i]);
 487 #endif
 488
 489   return SUCCESS;
 490 }
 491
 492 int ivac_display_prompt(t_display *display) {
 493
 494 #ifdef USE_NCURSES
 495   int x,y;
 496
 497   move(display->max_y-3,0);
 498   for(x=0;x<display->max_x;x++) addch('#');
 499   mvaddstr(display->max_y-2,0,"## command: ");
 500   mvaddstr(display->max_y-2,display->max_x-2,"##");
 501   move(display->max_y-1,0);
 502   for(x=0;x<display->max_x;x++) addch('#');
 503   refresh();
 504 #endif
 505
 506   return SUCCESS;
 507 }
 508
 509 int ivac_display_prompt_content(t_ivac *ivac) {
 510
 511 #ifdef USE_NCURSES
 512   int x,y;
 513
 514   /* delete old command */
 515   if(ivac->input.c_count==0) {
 516     move(ivac->display.max_y-2,12);
 517     for(x=12;x<ivac->display.max_x-1;x++) addch(' ');
 518   }
 519
 520   for(x=0;x<ivac->input.c_count;x++)
 521     mvaddch(ivac->display.max_y-2,x+12,ivac->input.content[x]);
 522   refresh();
 523 #else
 524   printf("%c",ivac->input.content[ivac->input.c_count-1]);
 525   fflush(NULL);
 526 #endif
 527
 528   return SUCCESS;
 529 }
 530
 531 int ivac_display(t_display *display) {
 532
 533   int x,y;
 534
 535   /* display head */
 536   ivac_display_head(display);
 537
 538   /* display box */
 539   ivac_display_box(display);
 540
 541   /* display console */
 542   ivac_display_console(display);
 543
 544   /* display command prompt */
 545   ivac_display_prompt(display);
 546
 547   return SUCCESS;
 548 }
 549
 550 int ivac_display_content(t_ivac *ivac) {
 551
 552   /* display box content */
 553   ivac_display_box_content(ivac);
 554
 555   /* display console content */
 556   ivac_display_console_content(ivac);
 557
 558   /* display prompt content */
 559   ivac_display_prompt_content(ivac);
 560
 561   return SUCCESS;
 562 }
 563
 564 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
 565
 566   int i;
 567
 568   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
 569     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
 570   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
 571
 572   return SUCCESS;
 573 }