/* parse the argument that specifies a two-directional data stream
and open the resulting address
*/
xiofile_t *xioopen(const char *addr, /* address specification */
int xioflags) {
xiofile_t *xfd;
if (xioinitialize() < 0) {
return NULL;
}
if ((xfd = xioparse_dual(&addr)) == NULL) {
return NULL;
}
if (xioopen_dual(xfd, xioflags) < 0) {
/*!!! free something? */
return NULL;
}
return xfd;
}
int main(int argc, const char *argv[]) {
const char **arg1, *a;
char *mainwaitstring;
char buff[10];
double rto;
int i, argc0, result;
struct utsname ubuf;
int lockrc;
if (mainwaitstring = getenv("SOCAT_MAIN_WAIT")) {
sleep(atoi(mainwaitstring));
}
diag_set('p', strchr(argv[0], '/') ? strrchr(argv[0], '/')+1 : argv[0]);
/* we must init before applying options because env settings have lower
priority and are to be overridden by options */
if (xioinitialize(XIO_MAYALL) != 0) {
Exit(1);
}
xiosetopt('p', "%");
xiosetopt('o', ":");
argc0 = argc; /* save for later use */
arg1 = argv+1; --argc;
while (arg1[0] && (arg1[0][0] == '-')) {
switch (arg1[0][1]) {
case 'V': socat_version(stdout); Exit(0);
#if WITH_HELP
case '?':
case 'h':
socat_usage(stdout);
xioopenhelp(stdout, (arg1[0][2]=='?'||arg1[0][2]=='h') ? (arg1[0][3]=='?'||arg1[0][3]=='h') ? 2 : 1 : 0);
Exit(0);
#endif /* WITH_HELP */
case 'd': diag_set('d', NULL); break;
#if WITH_FILAN
case 'D': xioparams->debug = true; break;
#endif
case 'l':
switch (arg1[0][2]) {
case 'm': /* mixed mode: stderr, then switch to syslog; + facility */
diag_set('s', NULL);
xiosetopt('l', "m");
xioparams->logopt = arg1[0][2];
xiosetopt('y', &arg1[0][3]);
break;
case 'y': /* syslog + facility */
diag_set(arg1[0][2], &arg1[0][3]);
break;
case 'f': /* to file, +filename */
case 'p': /* artificial program name */
if (arg1[0][3]) {
diag_set(arg1[0][2], &arg1[0][3]);
} else if (arg1[1]) {
diag_set(arg1[0][2], arg1[1]);
++arg1, --argc;
} else {
Error1("option -l%c requires an argument; use option \"-h\" for help", arg1[0][2]);
}
break;
case 's': /* stderr */
diag_set(arg1[0][2], NULL);
break;
case 'u':
diag_set('u', NULL);
break;
case 'h':
diag_set_int('h', true);
break;
default:
Error1("unknown log option \"%s\"; use option \"-h\" for help", arg1[0]);
break;
}
break;
case 'v': xioparams->verbose = true; break;
case 'x': xioparams->verbhex = true; break;
case 'b': if (arg1[0][2]) {
a = *arg1+2;
} else {
++arg1, --argc;
if ((a = *arg1) == NULL) {
Error("option -b requires an argument; use option \"-h\" for help");
Exit(1);
}
}
xioparams->bufsiz = strtoul(a, (char **)&a, 0);
break;
case 's':
diag_set_int('e', E_FATAL); break;
case 't': if (arg1[0][2]) {
a = *arg1+2;
} else {
++arg1, --argc;
if ((a = *arg1) == NULL) {
Error("option -t requires an argument; use option \"-h\" for help");
Exit(1);
}
}
rto = strtod(a, (char **)&a);
xioparams->closwait.tv_sec = rto;
xioparams->closwait.tv_usec =
(rto-xioparams->closwait.tv_sec) * 1000000;
break;
case 'T': if (arg1[0][2]) {
a = *arg1+2;
} else {
++arg1, --argc;
if ((a = *arg1) == NULL) {
Error("option -T requires an argument; use option \"-h\" for help");
Exit(1);
}
}
rto = strtod(a, (char **)&a);
xioparams->total_timeout.tv_sec = rto;
xioparams->total_timeout.tv_usec =
(rto-xioparams->total_timeout.tv_sec) * 1000000;
break;
case 'u': xioparams->lefttoright = true; break;
case 'U': xioparams->righttoleft = true; break;
case 'g': xioopts_ignoregroups = true; break;
case 'L': if (socat_opts.lock.lockfile)
Error("only one -L and -W option allowed");
if (arg1[0][2]) {
socat_opts.lock.lockfile = *arg1+2;
} else {
++arg1, --argc;
if ((socat_opts.lock.lockfile = *arg1) == NULL) {
Error("option -L requires an argument; use option \"-h\" for help");
Exit(1);
}
}
break;
case 'W': if (socat_opts.lock.lockfile)
Error("only one -L and -W option allowed");
if (arg1[0][2]) {
socat_opts.lock.lockfile = *arg1+2;
} else {
++arg1, --argc;
if ((socat_opts.lock.lockfile = *arg1) == NULL) {
Error("option -W requires an argument; use option \"-h\" for help");
Exit(1);
}
}
socat_opts.lock.waitlock = true;
socat_opts.lock.intervall.tv_sec = 1;
socat_opts.lock.intervall.tv_nsec = 0;
break;
#if WITH_IP4 || WITH_IP6
#if WITH_IP4
case '4':
#endif
#if WITH_IP6
case '6':
#endif
xioopts.default_ip = arg1[0][1];
xioopts.preferred_ip = arg1[0][1];
break;
#endif /* WITH_IP4 || WITH_IP6 */
case 'c':
switch (arg1[0][2]) {
case 'S': xioparams->pipetype = XIOCOMM_SOCKETPAIRS; break;
case 'P':
case 'p': xioparams->pipetype = XIOCOMM_PIPES; break;
case 's': xioparams->pipetype = XIOCOMM_SOCKETPAIR; break;
case 'Y': xioparams->pipetype = XIOCOMM_PTYS; break;
case 'y': xioparams->pipetype = XIOCOMM_PTY; break;
case 't': xioparams->pipetype = XIOCOMM_TCP; break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
xioparams->pipetype = atoi(&arg1[0][2]); break;
default: Error1("bad chain communication type \"%s\"", &arg1[0][2]);
}
break;
case '\0':
case '-': /*! this is hardcoded "--" */
case ',':
case ':': break; /* this "-" is a variation of STDIO or -- */
default:
xioinqopt('p', buff, sizeof(buff));
if (arg1[0][1] == buff[0]) {
break;
}
Error1("unknown option \"%s\"; use option \"-h\" for help", arg1[0]);
Exit(1);
}
/* the leading "-" might be a form of the first address */
xioinqopt('p', buff, sizeof(buff));
if (arg1[0][0] == '-' &&
(arg1[0][1] == '\0' || arg1[0][1] == ':' ||
arg1[0][1] == ',' || arg1[0][1] == '-'/*!*/ ||
arg1[0][1] == buff[0]))
break;
++arg1; --argc;
}
#if 0
Info1("%d address arguments", argc);
#else
if (argc != 2) {
Error1("exactly 2 addresses required (there are %d); use option \"-h\" for help", argc);
Exit(1);
}
#endif
if (xioparams->lefttoright && xioparams->righttoleft) {
Error("-U and -u must not be combined");
}
xioinitialize2();
Info(copyright_socat);
#if WITH_OPENSSL
Info(copyright_openssl);
Info(copyright_ssleay);
#endif
Debug2("socat version %s on %s", socatversion, timestamp);
xiosetenv("VERSION", socatversion, 1); /* SOCAT_VERSION */
uname(&ubuf); /* ! here we circumvent internal tracing (Uname) */
Debug4("running on %s version %s, release %s, machine %s\n",
ubuf.sysname, ubuf.version, ubuf.release, ubuf.machine);
#if WITH_MSGLEVEL <= E_DEBUG
for (i = 0; i < argc0; ++i) {
Debug2("argv[%d]: \"%s\"", i, argv[i]);
}
#endif /* WITH_MSGLEVEL <= E_DEBUG */
/* not sure what signal should print a message */
Signal(SIGHUP, socat_signal);
Signal(SIGINT, socat_signal);
Signal(SIGQUIT, socat_signal);
Signal(SIGILL, socat_signal);
/* SIGABRT for assert; catching caused endless recursion on assert in libc
(tzfile.c:498: __tzfile_compute: Assertion 'num_types == 1' failed.) */
/*Signal(SIGABRT, socat_signal);*/
Signal(SIGBUS, socat_signal);
Signal(SIGFPE, socat_signal);
Signal(SIGSEGV, socat_signal);
Signal(SIGTERM, socat_signal);
#if HAVE_SIGACTION
{
struct sigaction act;
memset(&act, 0, sizeof(struct sigaction));
act.sa_flags = SA_NOCLDSTOP|SA_RESTART|SA_SIGINFO
#ifdef SA_NOMASK
|SA_NOMASK
#endif
;
act.sa_sigaction = xiosigaction_subaddr_ok;
if (Sigaction(SIGUSR1, &act, NULL) < 0) {
/*! Linux man does not explicitely say that errno is defined */
Warn1("sigaction(SIGUSR1, {&xiosigaction_subaddr_ok}, NULL): %s", strerror(errno));
}
}
#else /* !HAVE_SIGACTION */
if (Signal(SIGUSR1, xiosigaction_subaddr_ok) == SIG_ERR) {
Warn1("signal(SIGCHLD, xiosigaction_subaddr_ok): %s", strerror(errno));
}
#endif /* !HAVE_SIGACTION */
/* set xio hooks */
xiohook_newchild = &socat_newchild;
if (lockrc = socat_lock()) {
/* =0: goon; >0: locked; <0: error, printed in sub */
if (lockrc > 0)
Error1("could not obtain lock \"%s\"", socat_opts.lock.lockfile);
Exit(1);
}
Atexit(socat_unlock);
result = socat(argc, arg1[0], arg1[1]);
Notice1("exiting with status %d", result);
Exit(result);
return 0; /* not reached, just for gcc -Wall */
}
/* call this function when the common command line options are parsed, and the
addresses are extracted (but not resolved). */
int socat(int argc, const char *address1, const char *address2) {
xiofile_t *xfd1, *xfd2;
xioinitialize(XIO_MAYALL);
#if 1
if (Signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
Warn1("signal(SIGPIPE, SIG_IGN): %s", strerror(errno));
}
#endif
/* open the first (left most) address */
if (xioparams->lefttoright) {
if ((xfd1 = socat_open(address1, XIO_RDONLY, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYCONVERT)) == NULL) {
return -1;
}
} else if (xioparams->righttoleft) {
if ((xfd1 = socat_open(address1, XIO_WRONLY, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYCONVERT)) == NULL) {
return -1;
}
} else {
if ((xfd1 = socat_open(address1, XIO_RDWR, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYCONVERT)) == NULL) {
return -1;
}
}
xiosetsigchild(xfd1, socat_sigchild);
#if 1 /*! */
if (XIO_RDSTREAM(xfd1)->subaddrstat < 0) {
Info1("child "F_pid" has already died",
XIO_RDSTREAM(xfd1)->child.pid);
XIO_RDSTREAM(xfd1)->child.pid = 0;
/* return STAT_RETRYLATER; */
}
#endif
/* second (right) addresses chain */
if (XIO_WRITABLE(xfd1)) {
if (XIO_READABLE(xfd1)) {
if ((xfd2 = socat_open(address2, XIO_RDWR, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYEXEC|XIO_MAYCONVERT)) == NULL) {
return -1;
}
} else {
if ((xfd2 = socat_open(address2, XIO_RDONLY, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYEXEC|XIO_MAYCONVERT)) == NULL) {
return -1;
}
}
} else { /* assuming sock1 is readable */
if ((xfd2 = socat_open(address2, XIO_WRONLY, XIO_MAYFORK|XIO_MAYCHILD|XIO_MAYEXEC|XIO_MAYCONVERT)) == NULL) {
return -1;
}
}
xiosetsigchild(xfd2, socat_sigchild);
#if 1 /*! */
if (XIO_RDSTREAM(xfd2)->subaddrstat < 0) {
Info1("child "F_pid" has already died",
XIO_RDSTREAM(xfd2)->child.pid);
XIO_RDSTREAM(xfd2)->child.pid = 0;
/* return STAT_RETRYLATER; */
}
#endif
Info("resolved and opened all sock addresses");
return
_socat(xfd1, xfd2);
}
