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