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aifled.c
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aifled.c
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/*
* aifled - AneMouse InterfaceLED
* Copyright (C)2010 Simone Irti <simmiyy@gmail.com>
* based on sifled 0.5, which is
* Copyright (C)2001 Martin Pot <m.t.pot@ieee.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Last modified: 011117
*
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <linux/kd.h>
#include <sys/utsname.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <unistd.h>
const char *banner =
"aifled v0.1 - (c)2010 Simone Irti <simmiyy@gmail.com>\n"
"(based on sifled v0.5 by Martin Pot <m.t.pot@ieee.org>\n"
"This program is distributed under the terms of GPL.\n";
const char *help =
"%sUsage: %s tty interface [options]\n"
"\ttty\t\tTty to flash LEDs on, use \"console\" for current.\n"
"\tinterface\tInterface to monitor, for example: eth0\n"
"Options:\n"
"\t-c crt\t\tLED config 3 chars, num, caps and scroll-lock.\n"
"\t\t\tr = Receive t = Transmit\n"
"\t\t\tu = Drop (receive) i = Drop (transmit)\n"
"\t\t\tj = Error (receive) k = Error (transmit)\n"
"\t\t\tReceive or transmit:\n"
"\t\t\te = Error d = Drop\n"
"\t\t\ta = Activity c = Collision\n"
"\t\t\tl = Link is alive (Smoothwall RED interface only)\n"
"\t\t\tn = None (will not touch this LED)\n"
"\t\t\tDefault: crt\n"
"\t-d delay\tLED update delay in ms. Default: 50\n"
"\t-i\t\tInvert LEDs.\n"
"\t-a\t\tAlternative LED code for none option.\n"
"\t-f\t\tFork program into background.\n"
"\t-v\t\tVerbose mode (-f overrides -v).\n\n"
"When -f is specified the program create a PID file in /var/run/\n\n";
#define TRUE 1
#define FALSE 0
#define IF_RX 0
#define IF_TX 1
#define IF_COLL 2
#define IF_DROP_RX 4
#define IF_DROP_TX 5
#define IF_ERR_TX 6
#define IF_ERR_RX 7
#define IF_RXTX 8
#define IF_DROP 9
#define IF_ERR 10
#define IF_NONE 11
#define IF_ALIVE 12
#define OPT_FORK 1
#define OPT_KERNEL_2_0 2
// Simmiyy - Extend options code
#define OPT_KERNEL_2_2 128
#define OPT_KERNEL_2_6 256
#define OPT_INVERT 4
#define OPT_ALTKBCODE 8
#define OPT_VERBOSE 16
#define OPT_VVERBOSE 32
#define OPT_DEBUG 64
unsigned long int if_info[15]; // current interface values.
unsigned long int l_if_info[15]; // last interface values.
unsigned char led_config[3] = {IF_COLL,IF_RX,IF_TX};
unsigned char options = 0;
int ttyfd;
FILE *fOut;
const char *szOutFile = "/tmp/aifled.log";
// Simmiyy - Added the PID file
const char *szPidFile = "/var/run/aifled.pid";
char szMsg[255];
// debug level (0 = none, 1 = startup info, 2 = verbose, 3 = very verbose)
int iDebug = 0;
void status_msg(char *szMessage, int iDebugLvl)
{
char szMsg[255];
// check debug level of this message less than app debug level
if (iDebugLvl <= iDebug)
{
// check if debugging to file, and file is open
if ((options & OPT_DEBUG) && (fOut != NULL))
{
sprintf(szMsg,"[%d] %s\n",iDebugLvl,szMessage);
fprintf(fOut,szMsg);
}
// check if very verbose and not forking
if ((options & OPT_VVERBOSE) && (!options & OPT_FORK))
printf("%s\n",szMessage);
}
}
void freakout(char *why)
{
fprintf(stderr,"Error: %s\n",why);
exit(1);
}
void set_led(char mode, char flag)
{
unsigned char last_leds;
ioctl(ttyfd,KDGETLED,&last_leds);
if (options & OPT_INVERT)
mode = !mode;
if (mode)
ioctl(ttyfd,KDSETLED,last_leds|flag);
else
ioctl(ttyfd,KDSETLED,last_leds&~flag);
usleep(10);
}
void update_netproc(char *interface)
{
char b[255];
char dummy;
FILE *procfd;
FILE *f;
// check if Smoothwall RED interface is up
if ((f = fopen("/var/smoothwall/red/active", "r")))
{
if_info[IF_ALIVE] = 1;
fclose (f);
}
else
if_info[IF_ALIVE] = 0;
// net network interface detail
if ((procfd = fopen("/proc/net/dev","r")) == NULL)
{
char *bp = b;
status_msg("unable to open /proc/net/dev",2);
// return;
// freakout("Unable to open /proc/net/dev.");
// populate b with dummy values
sscanf(bp,"%lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", "0 0 0 0 0 0 0 0 0 0 0 0 0 0");
}
while(fgets(b,sizeof(b),procfd) != NULL)
{
char *bp = b;
// skip over white space
while(*bp == ' ')
*bp++;
// look for interface name
if(strncmp(bp,interface,strlen(interface)) == 0 && *(bp+strlen(interface)) == ':' )
{
bp = bp+strlen(interface)+1;
// check for 2.0 kernel
if(options & OPT_KERNEL_2_0)
sscanf(bp,"%lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
&if_info[IF_RX],&if_info[IF_ERR_RX],&if_info[IF_DROP_RX],
&dummy,&dummy,&if_info[IF_TX],&if_info[IF_ERR_TX],
&if_info[IF_DROP_TX],&dummy,&if_info[IF_COLL]);
// Simmiyy - Modified the else statement
// or for 2.2 or 2.4 kernel
else if(options & OPT_KERNEL_2_2)
sscanf(bp,"%lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
&if_info[IF_RX],&dummy,&if_info[IF_ERR_RX],&if_info[IF_DROP_RX],
&dummy,&dummy,&dummy,&dummy,&if_info[IF_TX],&dummy,
&if_info[IF_ERR_TX],&if_info[IF_DROP_TX],&dummy,&if_info[IF_COLL]);
// Simmiyy - Add 2.6 kernel capabilities
else // so it's 2.6 kernel
sscanf(bp,"%lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
&if_info[IF_RX],&dummy,&if_info[IF_ERR_RX],&if_info[IF_DROP_RX],
&dummy,&dummy,&dummy,&dummy,&if_info[IF_TX],&dummy,
&if_info[IF_ERR_TX],&if_info[IF_DROP_TX],&dummy,&if_info[IF_COLL],&dummy,&dummy);
fclose(procfd);
return;
}
}
sprintf(szMsg,"unable to find interface %s\n", interface);
status_msg(szMsg,2);
fclose(procfd);
// freakout("Unable to find interface.");
}
char is_changed(char temp)
{
switch(temp)
{
case IF_RXTX:
return (((if_info[IF_TX] != l_if_info[IF_TX]) || (if_info[IF_RX] != l_if_info[IF_RX])) ? TRUE : FALSE);
case IF_DROP:
return (((if_info[IF_DROP_TX] != l_if_info[IF_DROP_TX]) || (if_info[IF_DROP_RX] != l_if_info[IF_DROP_RX])) ? TRUE : FALSE);
case IF_ERR:
return (((if_info[IF_ERR_TX] != l_if_info[IF_ERR_TX]) || (if_info[IF_ERR_RX] != l_if_info[IF_ERR_RX])) ? TRUE : FALSE);
default:
return (if_info[temp] != l_if_info[temp] ? TRUE : FALSE);
}
}
void update_leds(char *tty)
{
char i;
unsigned char real_status_leds[3] = {K_CAPSLOCK,K_NUMLOCK,K_SCROLLLOCK};
unsigned char real_status;
unsigned char leds[3] = {LED_NUM,LED_CAP,LED_SCR};
for(i=0; i < 3; i++)
{
if(led_config[i] == IF_NONE && options & OPT_ALTKBCODE)
{
ioctl(ttyfd,KDGKBLED,&real_status);
if(real_status & real_status_leds[i])
set_led(TRUE,leds[i]);
else
set_led(FALSE,leds[i]);
continue;
}
else if (led_config[i] == IF_ALIVE)
{
if (if_info[IF_ALIVE] == 1)
set_led(TRUE,leds[i]);
else
set_led(FALSE,leds[i]);
continue;
}
else if(led_config[i] == IF_NONE)
continue;
if(is_changed(led_config[i]))
set_led(TRUE,leds[i]);
else
set_led(FALSE,leds[i]);
}
memcpy(&l_if_info,&if_info,sizeof(if_info));
}
char select_mode(char mode)
{
switch(mode)
{
case 'r': return IF_RX;
case 't': return IF_TX;
case 'e': return IF_ERR;
case 'c': return IF_COLL;
case 'd': return IF_DROP;
case 'a': return IF_RXTX;
case 'u': return IF_DROP_RX;
case 'i': return IF_DROP_TX;
case 'j': return IF_ERR_RX;
case 'k': return IF_ERR_TX;
case 'l': return IF_ALIVE;
default: return IF_NONE;
}
}
void signal_handler(int signal)
{
close(ttyfd);
// Simmiyy - Delete the pid file
remove(szPidFile);
exit(0);
}
void fork_program()
{
pid_t program_pid;
status_msg("about to fork...",3);
program_pid = fork();
sprintf(szMsg,"done forking, return value: %d", program_pid);
status_msg(szMsg,3);
// check for fork error
if(program_pid == -1)
{
status_msg("unable to fork program",1);
freakout("Unable to fork program.");
}
// stop execution of parent process, but leave child running...
if(program_pid != 0)
{
// Simmiyy - The father process create the PID file and exit
FILE *f = NULL;
if((f = fopen( szPidFile, "w")) != NULL){
fprintf( f, "%d", program_pid );
fclose(f);
}
status_msg("parent process terminating...",1);
_exit(0);
// Simmiyy - Create a session and disconnect the child from controlling tty
} else {
setsid();
#ifdef TIOCNOTTY
int fd_tty;
if((fd_tty = open("/dev/tty", O_RDWR | O_NOCTTY)) != -1){
ioctl(fd_tty, TIOCNOTTY, NULL);
close(fd_tty);
status_msg("disconnected from controlling tty...",3);
}
#endif
}
}
int main(int argc, char *argv[])
{
FILE *procfd;
int delay = 50;
char tty[20] = "/dev/";
struct utsname uname_dummy;
char arg_dummy;
int i;
long j=0;
iDebug = 5;
if(argc < 3)
{
printf(help,banner,argv[0]);
exit(0);
}
for(arg_dummy=3; arg_dummy < argc; arg_dummy++)
{
if(argv[arg_dummy][0] != '-')
{
printf("Error: option: %s\n", argv[arg_dummy]);
exit(1);
}
switch(argv[arg_dummy][1])
{
case 'c':
if(argv[arg_dummy+1] == NULL || strlen(argv[arg_dummy+1]) != 3)
freakout("-c option needs 3 chars");
led_config[0] = select_mode(argv[arg_dummy+1][0]);
led_config[1] = select_mode(argv[arg_dummy+1][1]);
led_config[2] = select_mode(argv[arg_dummy+1][2]);
arg_dummy++;
break;
case 'd':
if(argv[arg_dummy+1] == NULL)
freakout("-d option needs an integer");
delay = atol(argv[arg_dummy+1]);
arg_dummy++;
break;
case 'f':
options |= OPT_FORK;
break;
case 'i':
options |= OPT_INVERT;
break;
case 'a':
options |= OPT_ALTKBCODE;
break;
case 'v':
if (options & OPT_VERBOSE)
options |= OPT_VVERBOSE;
else
options |= OPT_VERBOSE;
break;
case 'D':
options |= OPT_DEBUG;
break;
default:
printf("Error: option: %s\n",argv[arg_dummy]);
exit(1);
break;
}
}
//if (options & OPT_VERBOSE)
// iDebug = 2;
//if (options & OPT_VVERBOSE)
// iDebug = 3;
if (options & OPT_DEBUG)
{
if ((fOut = fopen(szOutFile, "w")) == NULL)
{
status_msg("failed to open output file",1);
}
else
{
status_msg("starting aifled....",2);
status_msg("successfully created output file",3);
}
}
// check if forking and verbose
// if ((options & OPT_VERBOSE) && (options & OPT_FORK))
// options -= OPT_VERBOSE;
// if ((options & OPT_VVERBOSE) && (options & OPT_FORK))
// options -= OPT_VVERBOSE;
uname(&uname_dummy);
sprintf(szMsg,"kernel version: %s", uname_dummy.release);
status_msg(szMsg,3);
if(strncmp(uname_dummy.release,"2.0",3) == 0)
options |= OPT_KERNEL_2_0;
// Simmiyy - Extend Kernel family selection
else if(strncmp(uname_dummy.release,"2.2",3) == 0 ||
strncmp(uname_dummy.release,"2.4",3) == 0)
options |= OPT_KERNEL_2_2;
// else if(strncmp(uname_dummy.release,"2.6",3) == 0)
// options |= OPT_KERNEL_2_6;
strcat(tty,argv[1]);
sprintf(szMsg,"opening tty %s...",tty);
status_msg(szMsg,2);
if((ttyfd = open(tty,O_RDWR)) < 0)
{
sprintf(szMsg,"unable to open tty %s",tty);
status_msg(szMsg,1);
freakout("Unable to open tty.");
}
else
{
sprintf(szMsg,"successfully opened tty %s",tty);
status_msg(szMsg,2);
}
if(options & OPT_FORK)
fork_program();
else
printf(banner);
// if (options & OPT_VVERBOSE)
// printf("running in very verbose mode...\n");
// else if (options & OPT_VERBOSE)
// printf("running in verbose mode...\n");
if (options & OPT_VERBOSE)
{
sprintf(szMsg,"monitoring interface %s on tty %s", argv[2], argv[1]);
status_msg(szMsg,1);
for (i=0; i<3; i++)
{
sprintf(szMsg,"led%d: ", i);
switch (led_config[i])
{
case IF_RX:
strcat(szMsg,"receive"); break;
case IF_TX:
strcat(szMsg,"transmit"); break;
case IF_COLL:
strcat(szMsg,"collision"); break;
case IF_DROP_RX:
strcat(szMsg,"drop (receive)"); break;
case IF_DROP_TX:
strcat(szMsg,"drop (transmit)"); break;
case IF_ERR_TX:
strcat(szMsg,"error (transmit)"); break;
case IF_ERR_RX:
strcat(szMsg,"error (receive)"); break;
case IF_RXTX:
strcat(szMsg,"activity"); break;
case IF_DROP:
strcat(szMsg,"drop"); break;
case IF_ERR:
strcat(szMsg,"error"); break;
case IF_NONE:
strcat(szMsg,"none"); break;
case IF_ALIVE:
strcat(szMsg,"red interface alive"); break;
}
status_msg(szMsg,1);
}
}
status_msg("SIGINT signal_handler....",3);
signal(SIGINT,signal_handler);
status_msg("SIGTERM signal_handler....",3);
signal(SIGTERM,signal_handler);
status_msg("update_netproc....",3);
update_netproc(argv[2]);
status_msg("memcpy....",3);
memcpy(&l_if_info,&if_info,sizeof(if_info));
while(1)
{
// if (options & OPT_VVERBOSE)
// {
//printf("%5d: ",j);
//sprintf(szMsg,"%5d: ",j);
//status_msg(szMsg,2);
//j++;
// printf("tx:%d rx:%d coll:%d tx_drop:%d rx_drop:%d err_tx:%d err_rx:%d alive:%d\n",
// if_info[IF_TX],if_info[IF_RX],if_info[IF_COLL],if_info[IF_DROP_TX],
// if_info[IF_DROP_RX],if_info[IF_ERR_TX],if_info[IF_ERR_RX],if_info[IF_ALIVE]);
sprintf(szMsg,"tx:%d rx:%d coll:%d tx_drop:%d rx_drop:%d err_tx:%d err_rx:%d alive:%d",
if_info[IF_TX],if_info[IF_RX],if_info[IF_COLL],if_info[IF_DROP_TX],
if_info[IF_DROP_RX],if_info[IF_ERR_TX],if_info[IF_ERR_RX],if_info[IF_ALIVE]);
status_msg(szMsg,2);
// }
status_msg("update_netproc....",3);
update_netproc(argv[2]);
status_msg("update_leds....",3);
update_leds(tty);
status_msg("usleep....",3);
usleep(delay*1000);
status_msg("done",3);
}
close(ttyfd);
return 0;
}