ppp.c

这是ppp的源代码 这是ppp的源代码

/* ppp.c
|
|  Copyright (C) 2001 Kent Robotti <[e-mail]>
|
|  This ppp.c is based on source from the dial2net v0.1.3 package below.
|
|  Author: Ted Harden <[e-mail]>
|  Latest versions might be found at: http://dial2net.sourceforge.net
|
|  This program is free software which I release under the GNU General Public
|  License. You may redistribute and/or modify this program under the terms
|  of that 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.
| 
|  To get a copy of the GNU General Puplic License, write to the Free Software
|  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/stat.h>

void setup() {

char login[50];
char password[50];
char phone_number[14];
char modem[15];

FILE *paps, *chaps, *opts, *cs, *ipup;

void write_setup( char *login, char *password, 
char *phone_number, char *modem ) {

mkdir("/etc/ppp",0755);

ipup = fopen("/etc/ppp/ip-up","w");
paps = fopen("/etc/ppp/pap-secrets","w");
chaps = fopen("/etc/ppp/chap-secrets","w");
opts = fopen("/etc/ppp/options","w");
cs = fopen("/etc/ppp/chat-script","w");

fprintf(paps,"\"%s\" * \"%s\" *",login,password);
fprintf(chaps,"\"%s\" * \"%s\" *",login,password);
fprintf(cs,"ABORT ERROR\n");
fprintf(cs,"ABORT BUSY\n");
fprintf(cs,"ABORT \"NO CARRIER\"\n");
fprintf(cs,"ABORT \"NO DIALTONE\"\n");
fprintf(cs,"REPORT CONNECT\n");
fprintf(cs,"\"\" \"AT&FW2\"\n");
fprintf(cs,"OK \"ATD%s\"\n",phone_number);
fprintf(cs,"TIMEOUT 60\n");
fprintf(cs,"CONNECT \"\\c\"\n");

fprintf(opts,"lock\ndefaultroute\nnoipdefault\nnoauth\nusepeerdns\nmodem\n/dev/%s\n115200\ncrtscts\ndebug\nasyncmap 0\nname \"%s\"",modem,login);

fprintf(ipup,"#!/bin/sh 
#
# This file was created when you ran 'ppp -s'.    
#  
# This file /etc/ppp/ip-up is run by pppd when there's a successful ppp 
# connection. 
#  
# Put any commands you want run after a successful connection in this file.  
#  
# The companion file is /etc/ppp/ip-down, it's run when the ppp connection 
# ends.  
# 
# The environment is cleared before executing this script so the path must 
# be reset. 
# 
PATH=/usr/bin:/usr/sbin:/usr/X11R6/bin:/sbin:/bin 
export PATH  

# This will print to the screen the local & remote ip address when you  
# make a successful ppp connection.  
# $4 = Local IP  $5 = Remote IP
#
# The CARRIER speed at which you connect will be reported if your modem 
# reports it.  
#
# You may have to add W2 or S95=1 to your modem init string to get your 
# modem to report the DCE = CARRIER speed.  
# Examples: AT&FW2 or AT&FS95=1  

[ ! -z $DNS1 ] && echo \"nameserver $DNS1\" > /etc/resolv.conf
[ ! -z $DNS2 ] && echo \"nameserver $DNS2\" >> /etc/resolv.conf

CS=\"`grep CONNECT /var/log/report-chat 2>/dev/null | cut -b 24-40 2>/dev/null`\"
if (echo \"$CS $4 > $5 $1\" | /usr/X11R6/bin/xmessage -display $HOSTNAME:0.0 -file - 2>/dev/null); then
:  
else  
echo \"$CS $4 > $5 $1\" >/dev/tty0 
fi  

#End!
"); 

chmod("/etc/ppp/pap-secrets",0600);
chmod("/etc/ppp/chap-secrets",0600);
chmod("/etc/ppp/options",0644);
chmod("/etc/ppp/chat-script",0644);
chmod("/etc/ppp/ip-up",0755);

fclose(ipup);
fclose(cs);
fclose(opts);
fclose(chaps);
fclose(paps);
} 

printf("\nPress Ctrl-C to quit!\n");
printf("\nEnter your login name: ");
scanf("%s",login);
printf("Enter your password: ");
scanf("%s",password);
printf("Enter your ISP's phone number. (ie 6661776): ");
scanf("%s",phone_number);
printf("What port is your modem on? (ttyS0 ttyS1 ttyS2 or ttyS3): ");
scanf("%s",modem);

write_setup(login, password, phone_number, modem);
}

int menu;

void ifnotroot()
{
if( getuid() != 0)
{
printf("You need to be root to setup ppp.\n");
exit(0);
}
}

void dialout()
{
unlink("/var/log/report-chat");
system("exec /usr/sbin/pppd connect '/usr/sbin/chat -v -r /var/log/report-chat -f /etc/ppp/chat-script'");
}

void disconnect()
{
system("kill -INT 2>/dev/null `cat /var/run/ppp*.pid 2>/dev/null` && sleep 3");
system("rm -f /var/run/ppp*.pid");
}

void usage()
{
	  printf("Usage: ppp [option]\n\nOptions:\n");
	  printf("\t-c\tMake ppp connection!\n");
	  printf("\t-d\tEnd ppp connectiom!\n");
	  printf("\t-h\tHelp!\n");
	  printf("\t-l\tShow last 24 messages from /var/log/messages!\n");
	  printf("\t-s\tSetup ppp connection!\n");
	  printf("\t-v\tShow version!\n\n");
	  exit(0);
}

int main(int argc, char *argv[])
{

	if (argc < 2) {
		usage();
	}

while((menu = getopt(argc, argv, "cdhlsv")) != -1) 
	{
switch(menu)    {
	case 'c':
		printf("Dialing...\n");
		disconnect();
		dialout();
		exit(0);
	case 'd':
		printf("Disconnecting...\n");
		disconnect();
		exit(0);
	case 'h':
	        usage();
        case 'l':
                system("tail -n 24 /var/log/messages | cut -d ' ' -f 5- | grep -v \" \\^M\" | sed \"s/\\^M//g\"");
		exit(0);
	case 's':
                ifnotroot();
		setup();
		printf("\nPPP Configured!\nRun 'ppp -c' to connect to your ISP.\n");	
		exit(0);
        case 'v':
                printf("PPPsetup v2.28\n");
		exit(0);
       default:
		exit(1);
       
}}

exit(0);
}