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 /* "constant" graphics */
135 ivac_display_head(&ivac);
136 ivac_display_box(&ivac);
137 ivac_display_console(&ivac);
141 /* start event system - callbacks used: ivac_event_cb + ivac_regular_cb */
142 event_start(&(ivac.event),(void *)&ivac,ivac_event_cb,ivac_regular_cb);
147 int ivac_shutdown(t_ivac *ivac) {
149 network_shutdown(&(ivac->net));
150 network_udp_shutdown(&(ivac->net));
151 input_shutdown(&(ivac->input));
152 event_stop(&(ivac->event));
153 audio_shutdown(&(ivac->audio));
154 display_shutdown(&(ivac->display));
159 int ivac_send_info(int channel,t_ivac *ivac) {
161 char data[SEND_N_MAX];
164 size=strlen(ivac->username);
166 data[0]=IVAC_SEND_NAME;
168 strncpy(data+2,ivac->username,size);
171 data[size]=IVAC_SEND_G_CAP;
173 data[size+2]=ivac->g_cap;
176 data[size]=IVAC_SEND_AV_CAP;
178 data[size+2]=(ivac->av_cap)>>8;
179 data[size+3]=(ivac->av_cap)&0xff;
182 if(network_send(ivac->net.connection[channel].fd,data,size)==N_ERROR) {
183 puts("[ivac] ivac_send_info failed");
190 int ivac_send_quit(int channel,t_ivac *ivac) {
192 char data[7]; /* one more for \0 */
194 data[0]=IVAC_SEND_QUIT;
196 strcpy(data+2,"quit");
198 if(network_send(ivac->net.connection[channel].fd,data,6)==N_ERROR) {
199 puts("[ivac] ivac_send_quit failed");
206 int ivac_receive_info(int channel,t_ivac *ivac) {
208 char data[SEND_N_MAX];
209 char c_str[IVAC_CONSOLE_STRING_LEN];
214 if((length=network_receive(ivac->net.connection[channel].fd,
215 data,SEND_N_MAX))==N_ERROR) {
216 puts("[ivac] ivac_receive_info failed");
220 while(length-count) {
221 switch(data[count]) {
223 strncpy(ivac->challenger[channel].name,data+count+2,data[count+1]);
224 ivac->challenger[channel].name[data[count+1]]='\0';
225 count+=(data[count+1]+2);
227 case IVAC_SEND_G_CAP:
228 ivac->challenger[channel].g_cap=data[count+2];
231 case IVAC_SEND_AV_CAP:
232 ivac->challenger[channel].av_cap=data[count+2]<<8;
233 ivac->challenger[channel].av_cap|=data[count+3];
237 if(!(strncmp(data+count+2,"quit",data[1])))
238 sprintf(c_str,"channel %02d: connection closed by remote host",
240 event_math(ivac->net.connection[channel].fd,&(ivac->event),
242 network_close(&(ivac->net),channel);
243 memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
244 ivac_add_to_monitor(ivac,c_str);
248 sprintf(c_str,"ivac_receive_info, unknown character: 0x%02x\n",
250 ivac_add_to_monitor(ivac,c_str);
259 int ivac_event_cb(t_event *event,void *ptr) {
263 char c_str[IVAC_CONSOLE_STRING_LEN];
267 /* incoming connection -- first contact => send info */
268 if(FD_ISSET(ivac->net.l_fd,&(event->rfds))) {
269 channel=network_manage_incoming(&(ivac->net));
270 if(channel==N_E_ACCEPT)
271 sprintf(c_str,"accept failed");
272 else if(channel==N_E_MAXC)
273 sprintf(c_str,"maximum connections reached");
275 sprintf(c_str,"connection from %s port %d on channel %d",
276 ivac->net.connection[channel].ip,
277 ivac->net.connection[channel].port,channel);
278 ivac_add_to_monitor(ivac,c_str);
279 event_math(ivac->net.connection[channel].fd,event,READ,ADD);
280 ivac_send_info(channel,ivac);
285 /* wait for user info */
286 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
287 if(ivac->net.connection[channel].status&C_ESTABL) {
288 /* remote is sending info */
289 if(FD_ISSET(ivac->net.connection[channel].fd,&(event->rfds))) {
290 if(ivac_receive_info(channel,ivac)==0) {
291 event_math(ivac->net.connection[channel].fd,event,READ,REMOVE);
292 network_close(&(ivac->net),channel);
293 sprintf(c_str,"channel %02d: broken pipe - disconnected",channel);
294 ivac_add_to_monitor(ivac,c_str);
301 /* user interaction */
302 if(FD_ISSET(0,&(event->rfds)))
303 input_get_event(&(ivac->input),ivac_parse_command,ivac);
308 int ivac_regular_cb(t_event *event,void *ptr) {
310 /* usual jobs like audio & video transmit ... */
315 int ivac_parse_command(t_input *input,void *ptr) {
322 char c_str[IVAC_CONSOLE_STRING_LEN];
323 char arg[IVAC_ARG_COUNT][IVAC_ARG_LEN];
329 /* refresh prompt content only */
330 ivac_display_prompt_content(ivac);
332 /* parse command routines */
333 if(data[input->c_count-1]=='\n') {
335 /* delete console string + args */
336 memset(c_str,0,IVAC_CONSOLE_STRING_LEN);
337 for(j=0;j<IVAC_ARG_COUNT;j++) memset(arg[j],0,IVAC_ARG_LEN);
341 while(data[len]!='\n') len++;
343 while((i<len) && (j<IVAC_ARG_COUNT)) {
345 while((data[i+k]!=' ')&&(data[i+k]!='\n')) {
352 while(data[i+k]==' ') k++;
356 /* parse command aka arg[0] */
357 if(!(strncmp(arg[0],"quit",4))) {
359 sprintf(c_str,"ivac shutdown ...");
360 for(i=0;i<MAX_CONNECTIONS;i++) {
361 if(ivac->net.connection[i].status&C_ESTABL) {
362 ivac_send_quit(i,ivac);
363 network_close(&(ivac->net),i);
368 if(!(strncmp(arg[0],"set",3))) {
370 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
372 if(!(strncmp(arg[1],"name",4))) {
373 strncpy(ivac->username,arg[2],CHAR_USERNAME);
374 sprintf(c_str,"changed username to %s",ivac->username);
376 else if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
377 i=network_set_connection_info(&(ivac->net),channel,arg[2],atoi(arg[3]));
379 sprintf(c_str,"channel %02d: connection in use",channel);
381 sprintf(c_str,"channel %02d: set connection info",channel);
382 } else snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown argument: '%s'",
385 if(!(strncmp(arg[0],"connect",7))) {
387 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
389 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
390 i=network_connect(&(ivac->net),channel);
392 sprintf(c_str,"channel %02d: connection in use",channel);
393 else if(i==N_E_NO_INFO)
394 sprintf(c_str,"channel %02d: channel not configured",channel);
396 sprintf(c_str,"channel %02d: connected to %s:%d",channel,
397 ivac->net.connection[channel].ip,
398 ivac->net.connection[channel].port);
399 event_math(ivac->net.connection[channel].fd,&(ivac->event),READ,ADD);
400 ivac_send_info(channel,ivac);
403 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
405 if(!(strncmp(arg[0],"close",5))) {
407 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
409 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
410 if(ivac->net.connection[channel].status&C_ESTABL) {
411 ivac_send_quit(channel,ivac);
412 event_math(ivac->net.connection[channel].fd,&(ivac->event),
414 network_close(&(ivac->net),channel);
415 sprintf(c_str,"channel %02d: connection closed",channel);
416 memset(&(ivac->challenger[channel]),0,sizeof(t_challenger));
419 sprintf(c_str,"channel %02d: no active connection",channel);
421 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
423 if(!(strncmp(arg[0],"select",6))) {
425 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
427 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
428 network_select(&(ivac->net),channel);
429 sprintf(c_str,"selected channel %d",channel);
431 else if(arg[1][0]='*') {
432 network_select(&(ivac->net),MAX_CONNECTIONS);
433 strcpy(c_str,"selected all channels");
435 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
437 if(!(strncmp(arg[0],"deselect",8))) {
439 if((arg[1][0]>='0')&&(arg[1][0]<='9')) channel=atoi(arg[1]);
441 if((channel>=0)&&(channel<MAX_CONNECTIONS)) {
442 network_deselect(&(ivac->net),channel);
443 sprintf(c_str,"deselected channel %d",channel);
445 else if(arg[1][0]='*') {
446 network_deselect(&(ivac->net),MAX_CONNECTIONS);
447 strcpy(c_str,"deselected all channels");
449 else sprintf(c_str,"invalid argument: '%s'",arg[1]);
453 snprintf(c_str,IVAC_CONSOLE_STRING_LEN,"unknown command: '%s'",arg[0]);
455 /* call network functions */
456 network_manage_connection(&(ivac->net));
458 /* add console string to console buffer */
459 ivac_add_to_monitor(ivac,c_str);
461 /* refresh whole display content */
464 /* delete content buffer + reset counter */
465 memset(input->content,0,input->c_count-1);
473 int ivac_display_head(t_ivac *ivac) {
475 display_line(&(ivac->display),0,ivac->display.max_x,0,0,'#');
476 display_string(&(ivac->display),(display->max_x-strlen(PROG_NAME))/2,2,
477 PROG_NAME,strlen(PROG_NAME));
478 display_line(&(ivac->display),0,ivac->display.max_x,2,2,'#');
483 GO ON HERE !!! display stuff
485 int ivac_display_box(t_ivac *ivac) {
488 puts("---------------------------------------------------------------------");
489 printf("username: %s, capabilities: %02x|%04x\n",ivac->username,ivac->g_cap,
491 puts("---------------------------------------------------------------------");
492 puts("connections:");
498 int ivac_display_box_content(t_ivac *ivac) {
502 /* prepare challenger names */
503 for(channel=0;channel<MAX_CONNECTIONS;channel++)
504 if(ivac->challenger[channel].name[0]==0)
505 strcpy(ivac->challenger[channel].name,"<empty>");
508 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
509 if(ivac->net.connection[channel].status&C_INFO_A)
510 printf("channel %02d: %s:%d, status: %02x, name: %s\n",channel,
511 ivac->net.connection[channel].ip,
512 ivac->net.connection[channel].port,
513 ivac->net.connection[channel].status,
514 ivac->challenger[channel].name);
521 int ivac_display_console(t_ivac *ivac) {
524 puts("---------------------------------------------------------------------");
525 puts("console messages:");
531 int ivac_display_console_content(t_ivac *ivac) {
536 for(i=0;i<IVAC_CONSOLE_LEN;i++)
537 printf("| %s\n",ivac->console[i]);
543 int ivac_display_prompt(t_ivac *ivac) {
546 puts("---------------------------------------------------------------------");
553 int ivac_display_prompt_content(t_ivac *ivac) {
556 printf("%c",ivac->input.content[ivac->input.c_count-1]);
563 int ivac_display(t_ivac *ivac) {
569 ivac_display_head(ivac);
572 ivac_display_box(ivac);
574 ivac_display_box_content(ivac);
577 /* display console */
578 ivac_display_console(ivac);
580 ivac_display_console_content(ivac);
583 /* display command prompt */
584 ivac_display_prompt(ivac);
591 int ivac_add_to_monitor(t_ivac *ivac,char *msg) {
595 for(i=0;i<IVAC_CONSOLE_LEN-1;i++)
596 memcpy(ivac->console[i],ivac->console[i+1],IVAC_CONSOLE_STRING_LEN);
597 memcpy(ivac->console[IVAC_CONSOLE_LEN-1],msg,IVAC_CONSOLE_STRING_LEN);