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/*
* Copyright (c) 1999-2002 Rinet Corp., Novosibirsk, Russia
* partial (c) vfom@narod.ru
*
* Redistribution and use in source forms, with and without modification,
* are permitted provided that this entire comment appears intact.
*
* THIS SOURCE CODE IS PROVIDED ``AS IS'' WITHOUT ANY WARRANTIES OF ANY KIND.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <syslog.h>
#include <errno.h>
#ifdef HAVE_DMALLOC_H
#include <dmalloc.h>
#else
#include "malloc.h"
#endif
#include "assert.h"
#include "netmon.h"
#include "regex.h"
extern int errno;
extern CONFIG *cf; /* current configuration */
static int pipe_execfile __P ((char *, char *,pid_t *, OBJECT *));
void
pipe_start(method)
METHOD *method;
{
SESSION *sd = method->sd;
OBJECT *target = sd->owner;
int tmpval;
/* sanity check */
if (!sd) return;
tcp_stop(method); /* stop the method if still running */
if ((method->sd)->pid > 0) { kill((method->sd)->pid, SIGTERM); }
sd->pid = -1;
/* open stream socket near before TCP session */
if ((sd->sock = pipe_execfile(method->when, method->argument, &(sd->pid), target)) < 0) {
tcp_close(errno, sd, 0);
return;
}
/* turn on non-blocking I/O before connecting */
if (set_socket_async(sd->sock, TRUE) < 0) {
tcp_close(errno, sd, 0);
if ((method->sd)->pid > 0) { kill((method->sd)->pid, SIGTERM); }
return;
}
/* timeout and retries for connection */
sd->timeout = method->timeout * 1000000L; /* make miscroseconds */
sd->retries = method->retries;
sd->connect = tcp_connect; /* `awaiting' connection */
if ((tmpval = session_start(sd, NULL)) != 0) {
dprintf(("pipe_start(%s/%s): reqid=%d\n",
sd->owner->name, method->name, tmpval));
//report(LOG_INFO, "pipe_start(%s/%s): reqid=%d\n",
// sd->owner->name, method->name, tmpval);
}
}
int
pipe_init(target, method)
OBJECT *target;
METHOD *method;
{
SESSION template;
dprintf(("pipe_init(%s/%s)\n", target->name, method->name));
// report(LOG_INFO,"pipe_init(%s/%s)\n", target->name, method->name);
if (method->sd)
session_free(method->sd);
memset(&template, 0, sizeof(template));
template.owner = target;
template.method = method;
template.sock = -1; /* not yet opened */
template.pid = -1;
template.timeout = method->timeout * 1000000L; /* make microseconds */
template.retries = method->retries;
template.connect = tcp_connect;
template.send = tcp_send;
template.recv = tcp_recv;
template.read = tcp_close;
if ((method->sd = session_create(&template)) == NULL) {
errno = ENOMEM;
return -1;
}
return 0;
}
#define MAX_ARGS 50
int
pipe_execfile(file, args, p_pid, target)
char *file, *args;
pid_t *p_pid;
OBJECT *target;
{
sigset_t sigmask;
int ac = 0, fildes[2];
char *av[MAX_ARGS+2];
extern char **environ;
pid_t pid;
dprintf(("pipe_execfile: %s %s\n", file, args ? args : "null"));
// report(LOG_INFO,"pipe_execfile: %s %s\n", file, args ? args : "null");
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, fildes) < 0) {
report(LOG_ERR, "socketpair: %m");
return(-1);
}
if (*file != '/') {
av[ac++] = "sh";
av[ac++] = "-c";
av[ac++] = file;
#ifdef _PATH_BSHELL
file = _PATH_BSHELL;
#else
file = "/bin/sh";
#endif
} else av[ac++] = strippath(file);
ac += make_argv(args, (char ***) &av[ac], MAX_ARGS);
av[ac] = NULL;
switch (pid=vfork()) {
case -1:
report(LOG_ERR, "fork: %m");
close(fildes[0]);
close(fildes[1]);
return(-1);
case 0: /* child */
if (fcntl(fildes[0], F_SETFD, 0) < 0) {
report(LOG_ERR," fcntl (F_SETFD, 0): %m");
_exit(127);
}
if (fildes[0] != 0) {
dup2(fildes[0], 0);
close(fildes[0]);
}
dup2(0, 1);
dup2(0, 2);
/* child would be terminated by signals */
sigprocmask(SIG_SETMASK, NULL, &sigmask);
sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
close(netstate_sock);
/* make session leader to be able killpg() latter */
setsid();
if ( cf->chrootdir) {
if ( chroot( cf->chrootdir ) < 0 ) {
report(LOG_ERR, "chroot %s: %s", cf->chrootdir,strerror(*(__error())) );
_exit(127);
}
}
if ( setgid(cf->gid) < 0 ) {
report(LOG_ERR, "setgid %s[%d]: %s", cf->groupname, cf->gid, strerror(*(__error())) );
_exit(127);
}
if ( (cf->uid != 0) & (setuid(cf->uid) < 0) ) {
report(LOG_ERR, "setuid %s[%d]: %s", cf->username, cf->uid, strerror(*(__error())) );
_exit(127);
}
setenv ("OBJECT_NAME",target->name,1 );
setenv ("OBJECT_ADDRESS",target->address,1 );
if (target->srcaddress)
setenv ("OBJECT_SRC_ADDRESS",target->srcaddress,1 );
if (target->datadir)
setenv ("OBJECT_DATADIR",target->datadir,1 );
execve(file, av, environ);
report(LOG_ERR, "execve %s: %m", file);
_exit(127);
}
/* parent */
if ( p_pid != NULL ) { *p_pid = pid; };
close(fildes[0]);
return(fildes[1]);
}
void
when_stop(method)
METHOD *method;
{
// session_stop(method->sd, 1);
}
void
when_start(method)
METHOD *method;
{
SESSION *sd = method->sd;
OBJECT *target = sd->owner;
TIMEVAL tv_now;
char *diag, buf[4096];
int tmpval, matched;
/* sanity check */
if (!sd) return;
sd->sock=-1;
/* calculate condition */
insert_variables(buf, sizeof(buf), method->when, TYPE_OBJECT, target);
matched = (calculate(buf) ? 1 : 0);
// report(LOG_WARNING, "when_start EVAL: '%s' %d %s %d",buf,matched,target->name,sd->tv_sum.tv_sec);
diag = "OK" ;
if ( matched ) {
gettimeofday(&tv_now,NULL);
if ( (u_int64_t)sd->tv_sum.tv_sec != 0 ) {
if ( ( (u_int64_t)(tv_now.tv_sec) - (u_int64_t)(sd->tv_sum.tv_sec) ) > method->timeout ) {
insert_variables(buf, sizeof(buf), method->when_fmt, TYPE_OBJECT, target);
diag = buf;
}
} else {
sd->tv_sum.tv_sec = tv_now.tv_sec;
matched = 0;
}
} else {
sd->tv_sum.tv_sec=0;
}
// report(LOG_WARNING, "when_start DIAG: '%s' %d %d",diag,matched,sd->tv_sum.tv_sec);
dump_var_list(target->var_list);
method_finished(target, method, diag, !matched);
}
int
when_init(target, method)
OBJECT *target;
METHOD *method;
{
SESSION template;
dprintf(("when_init(%s/%s)\n", target->name, method->name));
if (method->sd)
session_free(method->sd);
memset(&template, 0, sizeof(template));
template.owner = target;
template.method = method;
template.sock = -1; /* never used socket */
if ((method->sd = session_create(&template)) == NULL) {
errno = ENOMEM;
return -1;
}
return 0;
}
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