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