1 /* ivac.c -- main ivac file
3 * author: hackbard@hackdaworld.dyndns.org
4 * frank.zirkelbach@physik.uni-augsburg.de
6 * Copyright (C) 2004 Frank Zirkelbach
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.
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.
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
29 puts("usage: ivac <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");
43 int main(int argc,char **argv) {
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");
57 /* parse argv and change default values */
65 strncpy(ivac.username,argv[++i],CHAR_USERNAME);
68 ivac.net.l_port=atoi(argv[++i]);
71 ivac.net.l_udp_port=atoi(argv[++i]);
74 strncpy(ivac.audio.dsp_dev,argv[++i],MAX_CHAR_DEVICE);
77 strncpy(ivac.net.nic,argv[++i],MAX_NIC_DEVICE);
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);
93 /* set capabilities (futur: set by check routines) */
95 ivac.av_cap=AUDIO|VIDEO|DUPLEX;
97 /* set event timeout */
98 ivac.event.timeout.tv_sec=IVAC_S_SEC;
99 ivac.event.timeout.tv_usec=IVAC_S_USEC;
101 event_init(&(ivac.event));
104 ivac.input.mode=CONTENT_BUFFER;
105 input_init(&(ivac.input));
108 if(network_init(&(ivac.net))==N_ERROR) {
109 printf("[ivac] use 'fuser -n tcp %d' to determine the process to kill!\n",
111 ivac_shutdown(&ivac);
114 network_udp_listen_init(&(ivac.net));
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);
122 display_init(&(ivac.display));
124 /* use hardcoded audio settings by now */
125 ivac.audio.fmt=BIT_8;
126 ivac.audio.channels=MONO;
127 ivac.audio.speed=8000;
129 audio_init(&(ivac.audio));
130 audio_setup(&(ivac.audio));
134 ivac_display_draw(&ivac);
136 /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
137 event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
142 int ivac_shutdown(t_ivac *ivac) {
144 network_shutdown(&(ivac->net));
145 network_udp_shutdown(&(ivac->net));
146 input_shutdown(&(ivac->input));
147 event_stop(&(ivac->event));
148 audio_shutdown(&(ivac->audio));
149 display_shutdown(&(ivac->display));
154 int ivac_send_info(int channel,t_ivac *ivac) {
156 char data[SEND_N_MAX];
159 size=strlen(ivac->username);
161 data[0]=IVAC_SEND_NAME;
163 strncpy(data+2,ivac->username,size);
166 data[size]=IVAC_SEND_G_CAP;
168 data[size+2]=ivac->g_cap;
171 data[size]=IVAC_SEND_AV_CAP;
173 data[size+2]=(ivac->av_cap)>>8;
174 data[size+3]=(ivac->av_cap)&0xff;
177 if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
178 puts("[ivac] ivac_send_info failed");
185 int ivac_send_quit(int channel,t_ivac *ivac) {
187 char data[7]; /* one more for \0 */
189 data[0]=IVAC_SEND_QUIT;
191 strcpy(data+2,"quit");
193 if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
194 puts("[ivac] ivac_send_quit failed");
201 int ivac_receive_info(int channel,t_ivac *ivac) {
203 char data[SEND_N_MAX];
204 char c_str[IVAC_CONSOLE_STRING_LEN];
209 if((length=network_receive(ivac->net.connection[channel].fd,
210 data,SEND_N_MAX))==N_ERROR) {
211 puts("[ivac] ivac_receive_info failed");
215 while(length-count) {
216 switch(data[count]) {
218 strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
219 ivac->challenger[channel].name[data[count+1]]='\0';
220 count+=(data[count+1]+2);
222 case IVAC_SEND_G_CAP:
223 ivac->challenger[channel].g_cap=data[count+2];
226 case IVAC_SEND_AV_CAP:
227 ivac->challenger[channel].av_cap=data[count+2]<<8;
228 ivac->challenger[channel].av_cap|=data[count+3];
232 if(!(strncmp(data+count+2,"quit",data[1])))
233 sprintf(c_str,"channel %02d: connection closed by remote host",
235 event_math(ivac->net.connection[channel].fd,&(ivac->event),
237 network_close(&(ivac->net),channel);
238 memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
239 ivac_add_to_monitor(ivac,c_str);
243 sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
245 ivac_add_to_monitor(ivac,c_str);
254 int ivac_event_cb(t_event *event,void *ptr) {
258 char c_str[IVAC_CONSOLE_STRING_LEN];
262 /* incoming connection -- first contact => send info */
263 if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
264 channel=network_manage_incoming(&(ivac->net));
265 if(channel==N_E_ACCEPT)
266 sprintf(c_str,"accept failed");
267 else if(channel==N_E_MAXC)
268 sprintf(c_str,"maximum connections reached");
270 sprintf(c_str,"connection from %s port %d on channel %d",
271 ivac->net.connection[channel].ip,
272 ivac->net.connection[channel].port,channel);
273 ivac_add_to_monitor(ivac,c_str);
274 event_math(ivac->net.connection[channel].fd,event,READ,ADD);
275 ivac_send_info(channel,ivac);
277 ivac_display_content(ivac);
278 ivac_display_draw(ivac);
281 /* wait for user info */
282 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
283 if(ivac->net.connection[channel].status&C_ESTABL) {
284 /* remote is sending info */
285 if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
286 if(ivac_receive_info(channel,ivac)==0) {
287 event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
288 network_close(&(ivac->net),channel);
289 sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
290 ivac_add_to_monitor(ivac,c_str);
292 ivac_display_content(ivac);
293 ivac_display_draw(ivac);
298 /* user interaction */
299 if(FD_ISSET(0,&(event->rfds)))
300 input_get_event(&(ivac->input),ivac_parse_command,ivac);
305 int ivac_regular_cb(t_event *event,void *ptr) {
307 /* usual jobs like audio & video transmit ... */
312 int ivac_parse_command(t_input *input,void *ptr) {
319 char c_str[IVAC_CONSOLE_STRING_LEN];
320 char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
326 /* refresh prompt content only */
327 ivac_display_prompt_content(ivac);
329 /* parse command routines */
330 if(data[input->c_count-1]=='\n') {
332 /* delete console string + args */
333 memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
334 for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
338 while(data[len]!='\n') len++;
340 while((i<len) && (j<IVAC_ARG_COUNT)) {
342 while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
349 while(data[i+k]==' ') k++;
353 /* parse command aka arg[0] */
354 if(!(strncmp(arg[0],"quit",4))) {
356 sprintf(c_str,"ivac shutdown ...");
357 for(i=0;i<MAX_CONNECTIONS;i++) {
358 if(ivac->net.connection[i].status&C_ESTABL) {
359 ivac_send_quit(i,ivac);
360 network_close(&(ivac->net),i);
365 if(!(strncmp(arg[0],"set",3))) {
367 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
369 if(!(strncmp(arg[1],"name",4))) {
370 strncpy(ivac->username,arg[2],CHAR_USERNAME);
371 sprintf(c_str,"changed username to %s",ivac->username);
373 else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
374 i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
376 sprintf(c_str,"channel %02d: connection in use",channel);
378 sprintf(c_str,"channel %02d: set connection info",channel);
379 } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
382 if(!(strncmp(arg[0],"connect",7))) {
384 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
386 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
387 i=network_connect(&(ivac->net),channel);
389 sprintf(c_str,"channel %02d: connection in use",channel);
390 else if(i==N_E_NO_INFO)
391 sprintf(c_str,"channel %02d: channel not configured",channel);
393 sprintf(c_str,"channel %02d: connected to %s:%d",channel,
394 ivac->net.connection[channel].ip,
395 ivac->net.connection[channel].port);
396 event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
397 ivac_send_info(channel,ivac);
400 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
402 if(!(strncmp(arg[0],"close",5))) {
404 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
406 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
407 if(ivac->net.connection[channel].status&C_ESTABL) {
408 ivac_send_quit(channel,ivac);
409 event_math(ivac->net.connection[channel].fd,&(ivac->event),
411 network_close(&(ivac->net),channel);
412 sprintf(c_str,"channel %02d: connection closed",channel);
413 memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
416 sprintf(c_str,"channel %02d: no active connection",channel);
418 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
420 if(!(strncmp(arg[0],"select",6))) {
422 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
424 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
425 network_select(&(ivac->net),channel);
426 sprintf(c_str,"selected channel %d",channel);
428 else if(arg[1][0]='*') {
429 network_select(&(ivac->net),MAX_CONNECTIONS);
430 strcpy(c_str,"selected all channels");
432 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
434 if(!(strncmp(arg[0],"deselect",8))) {
436 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
438 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
439 network_deselect(&(ivac->net),channel);
440 sprintf(c_str,"deselected channel %d",channel);
442 else if(arg[1][0]='*') {
443 network_deselect(&(ivac->net),MAX_CONNECTIONS);
444 strcpy(c_str,"deselected all channels");
446 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
450 snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
452 /* call network functions */
453 network_manage_connection(&(ivac->net));
455 /* add console string to console buffer */
456 ivac_add_to_monitor(ivac,c_str);
458 /* refresh whole display content */
459 ivac_display_content(ivac);
460 ivac_display_draw(ivac);
462 /* delete content buffer + reset counter */
463 memset(input->content,0,input->c_count-1);
471 int ivac_display_head(t_ivac *ivac) {
473 display_line(&(ivac->display),0,0,ivac->display.max_x,0,'#');
474 display_string(&(ivac->display),(ivac->display.max_x-strlen(PROG_NAME))/2,1,
475 PROG_NAME,strlen(PROG_NAME));
476 display_line(&(ivac->display),0,2,ivac->display.max_x,2,'#');
481 int ivac_display_box(t_ivac *ivac) {
483 display_line(&(ivac->display),0,3,ivac->display.max_x,3,'-');
484 printf("username: %s, capabilities: %02x|%04x\n",ivac->username,ivac->g_cap,
486 display_line(&(ivac->display),0,5,ivac->display.max_x,5,'-');
487 display_string(&(ivac->display),0,6,"connections:",12);
488 display_line(&(ivac->display),
489 0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN-1,
491 ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN-1,'-');
496 int ivac_display_box_content(t_ivac *ivac) {
499 char string[MAX_BOX_CHARS];
501 /* prepare challenger names */
502 for(channel=0;channel<MAX_CONNECTIONS;channel++)
503 if(ivac->challenger[channel].name[0]==0)
504 strcpy(ivac->challenger[channel].name,"<empty>");
506 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
507 if(ivac->net.connection[channel].status&C_INFO_A) {
508 snprintf(string,MAX_BOX_CHARS,
509 "channel %02d: %s:%d, status: %02x, name: %s\n",channel,
510 ivac->net.connection[channel].ip,
511 ivac->net.connection[channel].port,
512 ivac->net.connection[channel].status,
513 ivac->challenger[channel].name);
514 display_string(&(ivac->display),0,IVAC_HEAD_LEN+4+channel,
515 string,strlen(string));
522 int ivac_display_console(t_ivac *ivac) {
524 display_string(&(ivac->display),
525 0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN,
526 "console messages:",17);
531 int ivac_display_console_content(t_ivac *ivac) {
534 char string[IVAC_CONSOLE_STRING_LEN];
536 for(i=0;i<IVAC_CONSOLE_LEN;i++) {
537 snprintf(string,IVAC_CONSOLE_STRING_LEN,"%s\n",ivac->console[i]);
538 display_string(&(ivac->display),
539 0,ivac->display.max_y-IVAC_PROMPT_LEN-IVAC_CONSOLE_LEN+1+i,
540 string,strlen(string));
546 int ivac_display_prompt(t_ivac *ivac) {
548 /* simply a printf - dirty! */
555 int ivac_display_prompt_content(t_ivac *ivac) {
557 /* simply a printf - dirty! */
558 printf("%c",ivac->input.content[ivac->input.c_count-1]);
564 int ivac_display_content(t_ivac *ivac) {
566 /* display box content */
567 ivac_display_box_content(ivac);
569 /* display console content */
570 ivac_display_console_content(ivac);
575 int ivac_display(t_ivac *ivac) {
579 /* display static head */
580 ivac_display_head(ivac);
582 /* display static box */
583 ivac_display_box(ivac);
585 /* display static console */
586 ivac_display_console(ivac);
588 /* display command prompt */
589 ivac_display_prompt(ivac);
594 int ivac_display_draw(t_ivac *ivac) {
596 display_draw_until_line(&(ivac->display),ivac->display.max_y-1);
597 ivac_display_prompt(ivac);
602 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
606 for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
607 memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
608 memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);