56a687fb6603443236966a3d32763c68a1d07abf
[my-code/ivac.git] / 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 /* dont care about ncurses .. go for gtk(2)! */
26 #define USE_GTK
27
28 #include "ivac.h"
29
30 int usage(void) {
31
32   puts("");
33   puts("usage: ivac <options>");
34   puts("");
35   puts("options:");
36   puts("-h \t\t show this help");
37   puts("-n <name> \t specify your name");
38   puts("-p <port> \t specify port to listen for incoming connections");
39   puts("");
40
41   return SUCCESS;
42 }
43
44 int main(int argc,char **argv) {
45
46   /* TESTING BY NOW */
47
48   t_ivac ivac;
49   int i;
50
51   /* default values */
52   strcpy(ivac.username,"ivac");
53   ivac.net.l_port=IVAC_LISTEN_PORT;
54  
55   /* parse argv and change default values */
56   for(i=1;i<argc;i++) {
57     if(argv[i][0]=='-') {
58       switch(argv[i][1]) {
59         case 'h':
60           usage();
61           break;
62         case 'n':
63           strncpy(ivac.username,argv[i+1],CHAR_USERNAME);
64           break;
65         case 'p':
66           ivac.net.l_port=atoi(argv[i+1]);
67           break;
68         default:
69           usage();
70           break;
71       }
72     }
73     else usage();
74   }
75
76   /* clear challenger struct */
77   for(i=0;i<MAX_CONNECTIONS;i++)
78     memset(&(ivac.challenger[i]),0,sizeof(t_challenger));
79   /* zero console buffer */
80   for(i=0;i<IVAC_CONSOLE_LEN;i++)
81     memset(ivac.console[i],0,IVAC_CONSOLE_STRING_LEN);
82
83   /* set capabilities (futur: set by check routines) */
84   ivac.g_cap=NETWORK;
85   ivac.av_cap=AUDIO|VIDEO|DUPLEX;
86
87   /* set event timeout */
88   ivac.event.timeout.tv_sec=IVAC_S_SEC;
89   ivac.event.timeout.tv_usec=IVAC_S_USEC;
90   /* event init */
91   event_init(&(ivac.event));
92
93   /* input init */
94   ivac.input.mode=CONTENT_BUFFER;
95   input_init(&(ivac.input));
96
97   /* network init */
98   if(network_init(&(ivac.net))==N_ERROR) {
99     printf("[ivac] use 'fuser -n tcp %d' to determine the process to kill!\n",
100            ivac.net.l_port);
101     ivac_shutdown(&ivac);
102     return ERROR;
103   }
104
105   /* add listening port + stdin to (read) event system */
106   event_math(ivac.net.l_fd,&(ivac.event),READ,ADD);
107   event_math(0,&(ivac.event),READ,ADD);
108
109 #ifdef USE_NCURSES
110   /* display init */
111   display_init(&(ivac.display));
112 #endif
113
114   /* display */
115   ivac_display(&(ivac.display));
116
117   /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
118   event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
119
120   return SUCCESS;
121 }
122
123 int ivac_shutdown(t_ivac *ivac) {
124
125   network_shutdown(&(ivac->net));
126   input_shutdown(&(ivac->input));
127   event_stop(&(ivac->event));
128 #ifdef USE_NCURSES
129   display_shutdown(&(ivac->display));
130 #endif
131
132   return SUCCESS;
133 }
134
135 int ivac_send_info(int channel,t_ivac *ivac) {
136
137   char data[SEND_N_MAX];
138   int size;
139
140   size=strlen(ivac->username);
141
142   data[0]=IVAC_SEND_NAME;
143   data[1]=size;
144   strncpy(data+2,ivac->username,size);
145   size+=2;
146
147   data[size]=IVAC_SEND_G_CAP;
148   data[size+1]=1;
149   data[size+2]=ivac->g_cap;
150   size+=3;
151
152   data[size]=IVAC_SEND_AV_CAP;
153   data[size+1]=2;
154   data[size+2]=(ivac->av_cap)>>8;
155   data[size+3]=(ivac->av_cap)&0xff;
156   size+=4;
157
158   if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
159     puts("[ivac] ivac_send_info failed");
160     return ERROR;
161   }
162
163   return SUCCESS;
164 }
165
166 int ivac_send_quit(int channel,t_ivac *ivac) {
167
168   char data[7]; /* one more for \0 */
169
170   data[0]=IVAC_SEND_QUIT;
171   data[1]=4;
172   strcpy(data+2,"quit");
173
174   if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
175     puts("[ivac] ivac_send_quit failed");
176     return ERROR;
177   }
178
179   return SUCCESS;
180 }
181
182 int ivac_receive_info(int channel,t_ivac *ivac) {
183
184   char data[SEND_N_MAX];
185   char c_str[IVAC_CONSOLE_STRING_LEN];
186   int count,length;
187
188   count=0;
189
190   if((length=network_receive(ivac->net.connection[channel].fd,
191                              data,SEND_N_MAX))==N_ERROR) {
192     puts("[ivac] ivac_receive_info failed");
193     return ERROR;
194   }
195
196   while(length-count) {
197     switch(data[count]) {
198       case IVAC_SEND_NAME:
199         strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
200         ivac->challenger[channel].name[data[count+1]]='\0';
201         count+=(data[count+1]+2);
202         break;
203       case IVAC_SEND_G_CAP:
204         ivac->challenger[channel].g_cap=data[count+2];
205         count+=3;
206         break;
207       case IVAC_SEND_AV_CAP:
208         ivac->challenger[channel].av_cap=data[count+2]<<8;
209         ivac->challenger[channel].av_cap|=data[count+3];
210         count+=4;
211         break;
212       case IVAC_SEND_QUIT:
213         if(!(strncmp(data+count+2,"quit",data[1])))
214           sprintf(c_str,"channel %02d: connection closed by remote host",
215                   channel);
216           event_math(ivac->net.connection[channel].fd,&(ivac->event),
217                      READ,REMOVE);
218           network_close(&(ivac->net),channel);
219           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
220           ivac_add_to_monitor(ivac,c_str);
221           count+=6;
222           break;
223       default:
224         sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
225                data[count]);
226         ivac_add_to_monitor(ivac,c_str);
227         return ERROR;
228         break;
229     }
230   }
231
232   return SUCCESS;
233 }
234
235 int ivac_event_cb(t_event *event,void *ptr) {
236  
237   t_ivac *ivac;
238   int channel;
239   char c_str[IVAC_CONSOLE_STRING_LEN];
240
241   ivac=(t_ivac *)ptr;
242
243   /* incoming connection -- first contact => send info */
244   if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
245     channel=network_manage_incoming(&(ivac->net));
246     if(channel==N_E_ACCEPT)
247       sprintf(c_str,"accept failed");
248     else if(channel==N_E_MAXC)
249       sprintf(c_str,"maximum connections reached");
250     else {
251       sprintf(c_str,"connection from %s port %d on channel %d",
252               ivac->net.connection[channel].ip,
253               ivac->net.connection[channel].port,channel);
254       ivac_add_to_monitor(ivac,c_str);
255       event_math(ivac->net.connection[channel].fd,event,READ,ADD);
256       ivac_send_info(channel,ivac);
257     }
258     ivac_display_content(ivac);
259   }
260
261   /* wait for user info */
262   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
263     if(ivac->net.connection[channel].status&C_ESTABL) {
264       /* remote is sending info */
265       if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
266         ivac_receive_info(channel,ivac);
267         ivac_display_content(ivac);
268       }
269     }
270   } 
271
272   /* user interaction */
273   if(FD_ISSET(0,&(event->rfds)))
274     input_get_event(&(ivac->input),ivac_parse_command,ivac);
275
276   return SUCCESS;
277 }
278
279 int ivac_regular_cb(t_event *event,void *ptr) {
280
281   /* usual jobs like audio & video transmit ... */
282
283   return SUCCESS;
284 }
285
286 int ivac_parse_command(t_input *input,void *ptr) {
287
288   t_ivac *ivac;
289   int i,j,k;
290   int len;
291   int channel;
292   char *data,valid;
293   char c_str[IVAC_CONSOLE_STRING_LEN];
294   char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
295
296   ivac=(t_ivac *)ptr;
297   data=input->content;
298   valid=0;
299
300   /* refresh prompt content only! */
301   ivac_display_prompt_content(ivac);
302
303   /* parse command routines */
304   if(data[input->c_count-1]=='\n') {
305
306     /* delete console string + args */
307     memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
308     for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
309
310     /* get args */
311     len=0;
312     while(data[len]!='\n') len++;
313     i=0; j=0;
314     while((i<len) && (j<IVAC_ARG_COUNT)) {
315       k=0;
316       while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
317         arg[j][k]=data[i+k];
318         k++;
319       }
320       arg[j][k]='\0';
321       j++;
322       /* skip all ' ' */
323       while(data[i+k]==' ') k++;
324       i+=k;
325     }
326
327     /* parse command  aka arg[0] */
328     if(!(strncmp(arg[0],"quit",4))) {
329       valid=1;
330       sprintf(c_str,"ivac shutdown ...");
331       for(i=0;i<MAX_CONNECTIONS;i++) {
332         if(ivac->net.connection[i].status&C_ESTABL) {
333           ivac_send_quit(i,ivac);
334           network_close(&(ivac->net),i);
335         }
336       }
337       ivac_shutdown(ivac);
338     }
339     if(!(strncmp(arg[0],"set",3))) {
340       valid=1;
341       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
342       else channel=-1;
343       if(!(strncmp(arg[1],"name",4))) {
344         strncpy(ivac->username,arg[2],CHAR_USERNAME);
345         sprintf(c_str,"changed username to %s",ivac->username);
346       }
347       else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
348         i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
349         if(i==N_E_IN_USE)
350           sprintf(c_str,"channel %02d: connection in use",channel);
351         if(i==N_SUCCESS)
352           sprintf(c_str,"channel %02d: set connection info",channel);
353       } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
354                       arg[1]);
355     }
356     if(!(strncmp(arg[0],"connect",7))) {
357       valid=1;
358       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
359       else channel=-1;
360       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
361         i=network_connect(&(ivac->net),channel);
362         if(i==N_E_IN_USE)
363           sprintf(c_str,"channel %02d: connection in use",channel);
364         else if(i==N_E_NO_INFO)
365           sprintf(c_str,"channel %02d: channel not configured",channel);
366         else {
367           sprintf(c_str,"channel %02d: connected to %s:%d",channel,
368                   ivac->net.connection[channel].ip,
369                   ivac->net.connection[channel].port);
370           event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
371           ivac_send_info(channel,ivac);
372         }
373       }
374       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
375     } 
376     if(!(strncmp(arg[0],"close",5))) {
377       valid=1;
378       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
379       else channel=-1;
380       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
381         if(ivac->net.connection[channel].status&C_ESTABL) {
382           ivac_send_quit(channel,ivac);
383           event_math(ivac->net.connection[channel].fd,&(ivac->event),
384                      READ,REMOVE);
385           network_close(&(ivac->net),channel);
386           sprintf(c_str,"channel %02d: connection closed",channel);
387           memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
388         }
389         else
390           sprintf(c_str,"channel %02d: no active connection",channel);
391       }
392       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
393     }
394     if(!(strncmp(arg[0],"select",6))) {
395       valid=1;
396       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
397       else channel=-1;
398       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
399         network_select(&(ivac->net),channel);
400         sprintf(c_str,"selected channel %d",channel);
401       }
402       else if(arg[1][0]='*') {
403         network_select(&(ivac->net),MAX_CONNECTIONS);
404         strcpy(c_str,"selected all channels");
405       }
406       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
407     }
408     if(!(strncmp(arg[0],"deselect",8))) {
409       valid=1;
410       if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
411       else channel=-1;
412       if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
413         network_deselect(&(ivac->net),channel);
414         sprintf(c_str,"deselected channel %d",channel);
415       }
416       else if(arg[1][0]='*') {
417         network_deselect(&(ivac->net),MAX_CONNECTIONS);
418         strcpy(c_str,"deselected all channels");
419       }
420       else sprintf(c_str,"invalid argument: '%s'",arg[1]);
421     }
422
423     if(!valid)
424       snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
425
426     /* call network functions */
427     network_manage_connection(&(ivac->net));
428
429     /* add console string to console buffer */
430     ivac_add_to_monitor(ivac,c_str);
431
432     /* refresh whole display content */
433     ivac_display_content(ivac);
434
435     /* delete content buffer + reset counter */
436     memset(input->content,0,input->c_count-1);
437     input->c_count=0;
438
439   }
440
441   return SUCCESS;
442 }
443
444 int ivac_display_head(t_display *display) {
445
446 #ifdef USE_NCURSES
447   int x,y;
448
449   move(0,0);
450   for(x=0;x<display->max_x;x++) addch('#');
451   mvaddstr(1,0,"##");
452   mvaddstr(1,(display->max_x-4)/2-4,"- ivac -");
453   mvaddstr(1,(display->max_x-2),"##");
454   move(2,0);
455   for(x=0;x<display->max_x;x++) addch('#');
456   refresh();
457 #else
458   puts("#########################################################");
459   puts("##### ivac - -  Copyright (C) 2004 Frank Zirkelbach #####");
460   puts("#########################################################");
461 #endif
462
463   return SUCCESS;
464 }
465
466 int ivac_display_box(t_display *display) {
467  
468 #ifdef USE_NCURSES 
469   int x,y;
470
471   for(y=IVAC_PROMPT_LEN;y<display->max_y-IVAC_PROMPT_LEN;y++) {
472     mvaddch(y,0,'#');
473     mvaddch(y,display->max_x-1,'#');
474   }
475 #endif
476
477   return SUCCESS;
478 }
479
480 int ivac_display_box_content(t_ivac *ivac) {
481
482   int channel;
483
484   /* prepare challenger names */
485   for(channel=0;channel<MAX_CONNECTIONS;channel++)
486     if(ivac->challenger[channel].name[0]==0)
487       strcpy(ivac->challenger[channel].name,"<empty>");
488
489 #ifdef USE_NCURSES
490 #else
491   for(channel=0;channel<MAX_CONNECTIONS;channel++) {
492     if(ivac->net.connection[channel].status&C_INFO_A)
493       printf("channel %02d: ip:%s port:%d status: %02x - name: %s\n",channel,
494              ivac->net.connection[channel].ip,
495              ivac->net.connection[channel].port,
496              ivac->net.connection[channel].status,
497              ivac->challenger[channel].name);
498   }
499 #endif
500
501   return SUCCESS;
502 }
503
504 int ivac_display_console(t_display *display) {
505
506 #ifdef USE_NCURSES                                             
507   int x,y;
508          
509   move(display->max_y-IVAC_CONSOLE_LEN-IVAC_PROMPT_LEN-1,0);
510   for(x=0;x<display->max_x;x++) addch('#');
511 #endif
512                                           
513   return SUCCESS;
514 }
515
516 int ivac_display_console_content(t_ivac *ivac) {
517
518 #ifdef USE_NCURSES
519   int x,y;
520   int len;
521
522   for(y=0;y<IVAC_CONSOLE_LEN;y++) {
523     len=strlen(ivac->console[y]);
524     move(ivac->display.max_y-IVAC_CONSOLE_LEN-IVAC_PROMPT_LEN+y,2);
525     for(x=0;x<len;x++)
526        addch(((ivac->console[y][x]>' ')||(ivac->console[y][x]<='~'))
527                ?ivac->console[y][x]:' ');
528     for(x=len;x<IVAC_CONSOLE_STRING_LEN-4;x++) addch(' ');
529   }
530   refresh();
531 #else
532   int i;
533
534   for(i=0;i<IVAC_CONSOLE_LEN;i++)
535     printf("[ivac] console line %d: %s\n",i,ivac->console[i]);
536 #endif
537
538   return SUCCESS;
539 }
540
541 int ivac_display_prompt(t_display *display) {
542
543 #ifdef USE_NCURSES
544   int x,y;
545
546   move(display->max_y-3,0);
547   for(x=0;x<display->max_x;x++) addch('#');
548   mvaddstr(display->max_y-2,0,"## command: ");
549   mvaddstr(display->max_y-2,display->max_x-2,"##");
550   move(display->max_y-1,0);
551   for(x=0;x<display->max_x;x++) addch('#');
552   refresh();
553 #endif
554
555   return SUCCESS;
556 }
557
558 int ivac_display_prompt_content(t_ivac *ivac) {
559
560 #ifdef USE_NCURSES
561   int x,y;
562
563   /* delete old command */
564   if(ivac->input.c_count==0) {
565     move(ivac->display.max_y-2,12);
566     for(x=12;x<ivac->display.max_x-1;x++) addch(' ');
567   }
568
569   for(x=0;x<ivac->input.c_count;x++)
570     mvaddch(ivac->display.max_y-2,x+12,ivac->input.content[x]);
571   refresh();
572 #else
573   printf("%c",ivac->input.content[ivac->input.c_count-1]);
574   fflush(NULL);
575 #endif
576
577   return SUCCESS;
578 }
579
580 int ivac_display(t_display *display) {
581
582   int x,y;
583
584   /* display head */
585   ivac_display_head(display);
586
587   /* display box */
588   ivac_display_box(display);
589
590   /* display console */
591   ivac_display_console(display);
592
593   /* display command prompt */
594   ivac_display_prompt(display);
595
596   return SUCCESS;
597 }
598
599 int ivac_display_content(t_ivac *ivac) {
600
601   /* display box content */
602   ivac_display_box_content(ivac);
603
604   /* display console content */
605   ivac_display_console_content(ivac);
606
607   /* display prompt content */
608   ivac_display_prompt_content(ivac);
609
610   return SUCCESS;
611 }
612
613 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
614
615   int i;
616
617   for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
618     memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
619   memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);
620
621   return SUCCESS;
622 }