1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
590 lines
12 KiB
C
590 lines
12 KiB
C
/*
|
|
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
|
|
*
|
|
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
|
|
*
|
|
* Most of codes are derived from chat.c by Karl Fox (karl@MorningStar.Com).
|
|
*
|
|
* Chat -- a program for automatic session establishment (i.e. dial
|
|
* the phone and log in).
|
|
*
|
|
* This software is in the public domain.
|
|
*
|
|
* Please send all bug reports, requests for information, etc. to:
|
|
*
|
|
* Karl Fox <karl@MorningStar.Com>
|
|
* Morning Star Technologies, Inc.
|
|
* 1760 Zollinger Road
|
|
* Columbus, OH 43221
|
|
* (614)451-1883
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* TODO:
|
|
* o Support more UUCP compatible control sequences.
|
|
* o Dialing shoud not block monitor process.
|
|
* o Reading modem by select should be unified into main.c
|
|
*/
|
|
#include "defs.h"
|
|
#include <ctype.h>
|
|
#include <sys/uio.h>
|
|
#ifndef isblank
|
|
#define isblank(c) ((c) == '\t' || (c) == ' ')
|
|
#endif
|
|
#include <sys/time.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <sys/wait.h>
|
|
#include "timeout.h"
|
|
#include "vars.h"
|
|
|
|
#define IBSIZE 200
|
|
|
|
static int TimeoutSec;
|
|
static int abort_next, timeout_next;
|
|
static int numaborts;
|
|
char *AbortStrings[50];
|
|
char inbuff[IBSIZE*2+1];
|
|
|
|
extern int ChangeParity(char *);
|
|
|
|
#define MATCH 1
|
|
#define NOMATCH 0
|
|
#define ABORT -1
|
|
|
|
static char *
|
|
findblank(p, instring)
|
|
char *p;
|
|
int instring;
|
|
{
|
|
if (instring) {
|
|
while (*p) {
|
|
if (*p == '\\') {
|
|
strcpy(p, p + 1);
|
|
if (!*p)
|
|
break;
|
|
} else if (*p == '"')
|
|
return(p);
|
|
p++;
|
|
}
|
|
} else {
|
|
while (*p) {
|
|
if (isblank(*p))
|
|
return(p);
|
|
p++;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
int
|
|
MakeArgs(script, pvect)
|
|
char *script;
|
|
char **pvect;
|
|
{
|
|
int nargs, nb;
|
|
int instring;
|
|
|
|
nargs = 0;
|
|
while (*script) {
|
|
nb = strspn(script, " \t");
|
|
script += nb;
|
|
if (*script) {
|
|
if (*script == '"') {
|
|
instring = 1;
|
|
script++;
|
|
if (*script == '\0')
|
|
return(nargs);
|
|
} else
|
|
instring = 0;
|
|
*pvect++ = script;
|
|
nargs++;
|
|
script = findblank(script, instring);
|
|
if (*script)
|
|
*script++ = '\0';
|
|
}
|
|
}
|
|
*pvect = NULL;
|
|
return nargs;
|
|
}
|
|
|
|
/*
|
|
* \c don't add a cr
|
|
* \d Sleep a little (delay 2 seconds
|
|
* \n Line feed character
|
|
* \P Auth Key password
|
|
* \p pause 0.25 sec
|
|
* \r Carrige return character
|
|
* \s Space character
|
|
* \T Telephone number(s) (defined via `set phone')
|
|
* \t Tab character
|
|
* \U Auth User
|
|
*/
|
|
char *
|
|
ExpandString(str, result, reslen, sendmode)
|
|
char *str;
|
|
char *result;
|
|
int reslen;
|
|
int sendmode;
|
|
{
|
|
int addcr = 0;
|
|
char *phone;
|
|
|
|
result[--reslen] = '\0';
|
|
if (sendmode)
|
|
addcr = 1;
|
|
while (*str && reslen > 0) {
|
|
switch (*str) {
|
|
case '\\':
|
|
str++;
|
|
switch (*str) {
|
|
case 'c':
|
|
if (sendmode)
|
|
addcr = 0;
|
|
break;
|
|
case 'd': /* Delay 2 seconds */
|
|
sleep(2); break;
|
|
case 'p':
|
|
usleep(250000); break; /* Pause 0.25 sec */
|
|
case 'n':
|
|
*result++ = '\n'; reslen--; break;
|
|
case 'r':
|
|
*result++ = '\r'; reslen--; break;
|
|
case 's':
|
|
*result++ = ' '; reslen--; break;
|
|
case 't':
|
|
*result++ = '\t'; reslen--; break;
|
|
case 'P':
|
|
strncpy(result, VarAuthKey, reslen);
|
|
reslen -= strlen(result);
|
|
result += strlen(result);
|
|
break;
|
|
case 'T':
|
|
if (VarNextPhone == NULL) {
|
|
strcpy(VarPhoneCopy, VarPhoneList);
|
|
VarNextPhone = VarPhoneCopy;
|
|
}
|
|
phone = strsep(&VarNextPhone, ":");
|
|
strncpy(result, phone, reslen);
|
|
reslen -= strlen(result);
|
|
result += strlen(result);
|
|
if ((mode & (MODE_INTER|MODE_AUTO)) == MODE_INTER)
|
|
fprintf(stderr, "Phone: %s\n", phone);
|
|
LogPrintf(LOG_PHASE_BIT, "Phone: %s\n", phone);
|
|
break;
|
|
case 'U':
|
|
strncpy(result, VarAuthName, reslen);
|
|
reslen -= strlen(result);
|
|
result += strlen(result);
|
|
break;
|
|
default:
|
|
reslen--;
|
|
*result++ = *str;
|
|
break;
|
|
}
|
|
if (*str)
|
|
str++;
|
|
break;
|
|
case '^':
|
|
str++;
|
|
if (*str) {
|
|
*result++ = *str++ & 0x1f;
|
|
reslen--;
|
|
}
|
|
break;
|
|
default:
|
|
*result++ = *str++;
|
|
reslen--;
|
|
break;
|
|
}
|
|
}
|
|
if (--reslen > 0) {
|
|
if (addcr)
|
|
*result++ = '\r';
|
|
}
|
|
if (--reslen > 0)
|
|
*result++ = '\0';
|
|
return(result);
|
|
}
|
|
|
|
#define MAXLOGBUFF 200
|
|
static char logbuff[MAXLOGBUFF];
|
|
static int loglen = 0;
|
|
|
|
static void clear_log() {
|
|
memset(logbuff,0,MAXLOGBUFF);
|
|
loglen = 0;
|
|
}
|
|
|
|
static void flush_log() {
|
|
if ((loglevel & LOG_CONNECT_BIT)
|
|
|| ((loglevel & LOG_CARRIER_BIT)
|
|
&& strstr(logbuff,"CARRIER"))) {
|
|
LogPrintf(LOG_CONNECT_BIT|LOG_CARRIER_BIT,"Chat: %s\n",logbuff);
|
|
}
|
|
clear_log();
|
|
}
|
|
|
|
static void connect_log(char *str, int single_p) {
|
|
int space = MAXLOGBUFF - loglen - 1;
|
|
|
|
while (space--) {
|
|
if (*str == '\n') {
|
|
flush_log();
|
|
} else {
|
|
logbuff[loglen++] = *str;
|
|
}
|
|
if (single_p || !*++str) break;
|
|
}
|
|
if (!space) flush_log();
|
|
}
|
|
|
|
|
|
|
|
int
|
|
WaitforString(estr)
|
|
char *estr;
|
|
{
|
|
struct timeval timeout;
|
|
char *s, *str, ch;
|
|
char *inp;
|
|
fd_set rfds;
|
|
int i, nfds, nb, msg;
|
|
char buff[200];
|
|
|
|
|
|
#ifdef SIGALRM
|
|
int omask;
|
|
omask = sigblock(sigmask(SIGALRM));
|
|
#endif
|
|
clear_log();
|
|
(void) ExpandString(estr, buff, sizeof(buff), 0);
|
|
LogPrintf(LOG_CHAT_BIT, "Wait for (%d): %s --> %s\n", TimeoutSec, estr, buff);
|
|
str = buff;
|
|
inp = inbuff;
|
|
|
|
if (strlen(str)>=IBSIZE){
|
|
str[IBSIZE]=0;
|
|
LogPrintf(LOG_CHAT_BIT, "Truncating String to %d character: %s\n", IBSIZE, str);
|
|
}
|
|
|
|
nfds = modem + 1;
|
|
s = str;
|
|
msg = FALSE;
|
|
for (;;) {
|
|
FD_ZERO(&rfds);
|
|
FD_SET(modem, &rfds);
|
|
/*
|
|
* Because it is not clear whether select() modifies timeout value,
|
|
* it is better to initialize timeout values everytime.
|
|
*/
|
|
timeout.tv_sec = TimeoutSec;
|
|
timeout.tv_usec = 0;
|
|
i = select(nfds, &rfds, NULL, NULL, &timeout);
|
|
#ifdef notdef
|
|
TimerService();
|
|
#endif
|
|
if (i < 0) {
|
|
#ifdef SIGALRM
|
|
if (errno == EINTR)
|
|
continue;
|
|
sigsetmask(omask);
|
|
#endif
|
|
perror("select");
|
|
*inp = 0;
|
|
return(NOMATCH);
|
|
} else if (i == 0) { /* Timeout reached! */
|
|
*inp = 0;
|
|
if (inp != inbuff)
|
|
LogPrintf(LOG_CHAT_BIT, "got: %s\n", inbuff);
|
|
LogPrintf(LOG_CHAT_BIT, "can't get (%d).\n", timeout.tv_sec);
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
return(NOMATCH);
|
|
}
|
|
if (FD_ISSET(modem, &rfds)) { /* got something */
|
|
if (DEV_IS_SYNC) {
|
|
int length;
|
|
if ((length=strlen(inbuff))>IBSIZE){
|
|
bcopy(&(inbuff[IBSIZE]),inbuff,IBSIZE+1); /* shuffle down next part*/
|
|
length=strlen(inbuff);
|
|
}
|
|
nb = read(modem, &(inbuff[length]), IBSIZE);
|
|
inbuff[nb + length] = 0;
|
|
connect_log(inbuff,0);
|
|
if (strstr(inbuff, str)) {
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
flush_log();
|
|
return(MATCH);
|
|
}
|
|
for (i = 0; i < numaborts; i++) {
|
|
if (strstr(inbuff, AbortStrings[i])) {
|
|
LogPrintf(LOG_CHAT_BIT, "Abort: %s\n", AbortStrings[i]);
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
flush_log();
|
|
return(ABORT);
|
|
}
|
|
}
|
|
} else {
|
|
read(modem, &ch, 1);
|
|
connect_log(&ch,1);
|
|
*inp++ = ch;
|
|
if (ch == *s) {
|
|
s++;
|
|
if (*s == '\0') {
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
*inp = 0;
|
|
flush_log();
|
|
return(MATCH);
|
|
}
|
|
} else {
|
|
s = str;
|
|
if (inp == inbuff+ IBSIZE) {
|
|
bcopy(inp - 100, inbuff, 100);
|
|
inp = inbuff + 100;
|
|
}
|
|
for (i = 0; i < numaborts; i++) { /* Look for Abort strings */
|
|
int len;
|
|
char *s1;
|
|
|
|
s1 = AbortStrings[i];
|
|
len = strlen(s1);
|
|
if ((len <= inp - inbuff) && (strncmp(inp - len, s1, len) == 0)) {
|
|
LogPrintf(LOG_CHAT_BIT, "Abort: %s\n", s1);
|
|
*inp = 0;
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
flush_log();
|
|
return(ABORT);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#ifdef SIGALRM
|
|
sigsetmask(omask);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
ExecStr(command, out)
|
|
char *command, *out;
|
|
{
|
|
int pid;
|
|
int fids[2];
|
|
char *vector[20];
|
|
int stat, nb;
|
|
char *cp;
|
|
char tmp[300];
|
|
extern int errno;
|
|
|
|
cp = inbuff + strlen(inbuff) - 1;
|
|
while (cp > inbuff) {
|
|
if (*cp < ' ' && *cp != '\t') {
|
|
cp++;
|
|
break;
|
|
}
|
|
cp--;
|
|
}
|
|
snprintf(tmp, sizeof tmp, "%s %s", command, cp);
|
|
(void) MakeArgs(tmp, &vector);
|
|
|
|
pipe(fids);
|
|
pid = fork();
|
|
if (pid == 0) {
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
signal(SIGTERM, SIG_DFL);
|
|
signal(SIGHUP, SIG_DFL);
|
|
close(fids[0]);
|
|
dup2(fids[1], 1);
|
|
close(fids[1]);
|
|
nb = open("/dev/tty", O_RDWR);
|
|
dup2(nb, 0);
|
|
LogPrintf(LOG_CHAT_BIT, "exec: %s\n", command);
|
|
/* switch back to original privileges */
|
|
if (setgid(getgid()) < 0) {
|
|
LogPrintf(LOG_CHAT_BIT, "setgid: %s\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
if (setuid(getuid()) < 0) {
|
|
LogPrintf(LOG_CHAT_BIT, "setuid: %s\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
pid = execvp(command, vector);
|
|
LogPrintf(LOG_CHAT_BIT, "execvp failed for (%d/%d): %s\n", pid, errno, command);
|
|
exit(127);
|
|
} else {
|
|
close(fids[1]);
|
|
for (;;) {
|
|
nb = read(fids[0], out, 1);
|
|
if (nb <= 0)
|
|
break;
|
|
out++;
|
|
}
|
|
*out = '\0';
|
|
close(fids[0]);
|
|
close(fids[1]);
|
|
waitpid(pid, &stat, WNOHANG);
|
|
}
|
|
}
|
|
|
|
void
|
|
SendString(str)
|
|
char *str;
|
|
{
|
|
char *cp;
|
|
int nb, on;
|
|
char buff[200];
|
|
|
|
if (abort_next) {
|
|
abort_next = 0;
|
|
ExpandString(str, buff, sizeof(buff), 0);
|
|
AbortStrings[numaborts++] = strdup(buff);
|
|
} else if (timeout_next) {
|
|
timeout_next = 0;
|
|
TimeoutSec = atoi(str);
|
|
if (TimeoutSec <= 0)
|
|
TimeoutSec = 30;
|
|
} else {
|
|
if (*str == '!') {
|
|
(void) ExpandString(str+1, buff+2, sizeof(buff)-2, 0);
|
|
ExecStr(buff + 2, buff + 2);
|
|
} else {
|
|
(void) ExpandString(str, buff+2, sizeof(buff)-2, 1);
|
|
}
|
|
if (strstr(str, "\\P")) { /* Do not log the password itself. */
|
|
LogPrintf(LOG_CHAT_BIT, "sending: %s\n", str);
|
|
} else {
|
|
LogPrintf(LOG_CHAT_BIT, "sending: %s\n", buff+2);
|
|
}
|
|
cp = buff;
|
|
if (DEV_IS_SYNC)
|
|
bcopy("\377\003", buff, 2); /* Prepend HDLC header */
|
|
else
|
|
cp += 2;
|
|
on = strlen(cp);
|
|
nb = write(modem, cp, on);
|
|
}
|
|
}
|
|
|
|
int
|
|
ExpectString(str)
|
|
char *str;
|
|
{
|
|
char *minus;
|
|
int state;
|
|
|
|
if (strcmp(str, "ABORT") == 0) {
|
|
++abort_next;
|
|
return(MATCH);
|
|
}
|
|
if (strcmp(str, "TIMEOUT") == 0) {
|
|
++timeout_next;
|
|
return(MATCH);
|
|
}
|
|
LogPrintf(LOG_CHAT_BIT, "Expecting %s\n", str);
|
|
while (*str) {
|
|
/*
|
|
* Check whether if string contains sub-send-expect.
|
|
*/
|
|
for (minus = str; *minus; minus++) {
|
|
if (*minus == '-') {
|
|
if (minus == str || minus[-1] != '\\')
|
|
break;
|
|
}
|
|
}
|
|
if (*minus == '-') { /* We have sub-send-expect. */
|
|
*minus++ = '\0';
|
|
state = WaitforString(str);
|
|
if (state != NOMATCH)
|
|
return(state);
|
|
/*
|
|
* Can't get expect string. Sendout send part.
|
|
*/
|
|
str = minus;
|
|
for (minus = str; *minus; minus++) {
|
|
if (*minus == '-') {
|
|
if (minus == str || minus[-1] != '\\')
|
|
break;
|
|
}
|
|
}
|
|
if (*minus == '-') {
|
|
*minus++ = '\0';
|
|
SendString(str);
|
|
str = minus;
|
|
} else {
|
|
SendString(str);
|
|
return(MATCH);
|
|
}
|
|
} else {
|
|
/*
|
|
* Simple case. Wait for string.
|
|
*/
|
|
return(WaitforString(str));
|
|
}
|
|
}
|
|
return(MATCH);
|
|
}
|
|
|
|
int
|
|
DoChat(script)
|
|
char *script;
|
|
{
|
|
char *vector[20];
|
|
char **argv;
|
|
int argc, n, state;
|
|
#ifdef DEBUG
|
|
int i;
|
|
#endif
|
|
|
|
timeout_next = abort_next = 0;
|
|
for (n = 0; AbortStrings[n]; n++) {
|
|
free(AbortStrings[n]);
|
|
AbortStrings[n] = NULL;
|
|
}
|
|
numaborts = 0;
|
|
|
|
bzero(vector, sizeof(vector));
|
|
n = MakeArgs(script, &vector);
|
|
#ifdef DEBUG
|
|
logprintf("n = %d\n", n);
|
|
for (i = 0; i < n; i++)
|
|
logprintf(" %s\n", vector[i]);
|
|
#endif
|
|
argc = n;
|
|
argv = vector;
|
|
TimeoutSec = 30;
|
|
while (*argv) {
|
|
if (strcmp(*argv, "P_ZERO") == 0 ||
|
|
strcmp(*argv, "P_ODD") == 0 || strcmp(*argv, "P_EVEN") == 0) {
|
|
ChangeParity(*argv++);
|
|
continue;
|
|
}
|
|
state = ExpectString(*argv++);
|
|
switch (state) {
|
|
case MATCH:
|
|
if (*argv)
|
|
SendString(*argv++);
|
|
break;
|
|
case ABORT:
|
|
#ifdef notdef
|
|
HangupModem();
|
|
#endif
|
|
case NOMATCH:
|
|
return(NOMATCH);
|
|
}
|
|
}
|
|
return(MATCH);
|
|
}
|