/* we expect the form "host:port" */
int xioopen_ipapp_connect(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd,
unsigned groups, int socktype, int ipproto,
int pf) {
struct single *xfd = &xxfd->stream;
struct opt *opts0 = NULL;
const char *hostname = argv[1], *portname = argv[2];
bool dofork = false;
union sockaddr_union us_sa, *us = &us_sa;
union sockaddr_union them_sa, *them = &them_sa;
socklen_t uslen = sizeof(us_sa);
socklen_t themlen = sizeof(them_sa);
bool needbind = false;
bool lowport = false;
int level;
int result;
if (argc != 3) {
Error2("%s: wrong number of parameters (%d instead of 2)", argv[0], argc-1);
}
xfd->howtoend = END_SHUTDOWN;
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_bool(opts, OPT_FORK, &dofork);
if (_xioopen_ipapp_prepare(opts, &opts0, hostname, portname, &pf, ipproto,
xfd->para.socket.ip.res_opts[1],
xfd->para.socket.ip.res_opts[0],
them, &themlen, us, &uslen, &needbind, &lowport,
socktype) != STAT_OK) {
return STAT_NORETRY;
}
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
if (xioopts.logopt == 'm') {
Info("starting connect loop, switching to syslog");
diag_set('y', xioopts.syslogfac); xioopts.logopt = 'y';
} else {
Info("starting connect loop");
}
do { /* loop over retries and forks */
#if WITH_RETRY
if (xfd->forever || xfd->retry) {
level = E_INFO;
} else
#endif /* WITH_RETRY */
level = E_ERROR;
result =
_xioopen_connect(xfd,
needbind?(struct sockaddr *)us:NULL, uslen,
(struct sockaddr *)them, themlen,
opts, pf, socktype, ipproto, lowport, level);
switch (result) {
case STAT_OK: break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry) {
--xfd->retry;
if (result == STAT_RETRYLATER) {
Nanosleep(&xfd->intervall, NULL);
}
dropopts(opts, PH_ALL); free(opts); opts = copyopts(opts0, GROUP_ALL);
continue;
}
return STAT_NORETRY;
#endif /* WITH_RETRY */
default:
free(opts0);free(opts);
return result;
}
#if WITH_RETRY
if (dofork) {
pid_t pid;
int level = E_ERROR;
if (xfd->forever || xfd->retry) {
level = E_WARN; /* most users won't expect a problem here,
so Notice is too weak */
}
while ((pid = xio_fork(false, level)) < 0) {
if (xfd->forever || --xfd->retry) {
Nanosleep(&xfd->intervall, NULL); continue;
}
free(opts0);
return STAT_RETRYLATER;
}
if (pid == 0) { /* child process */
xfd->forever = false; xfd->retry = 0;
break;
}
/* parent process */
Close(xfd->fd);
/* with and without retry */
Nanosleep(&xfd->intervall, NULL);
dropopts(opts, PH_ALL); free(opts); opts = copyopts(opts0, GROUP_ALL);
continue; /* with next socket() bind() connect() */
} else
#endif /* WITH_RETRY */
{
break;
}
} while (true);
/* only "active" process breaks (master without fork, or child) */
if ((result = _xio_openlate(xfd, opts)) < 0) {
free(opts0);free(opts);
return result;
}
free(opts0);free(opts);
return 0;
}
/* we expect the form: port */
int xioopen_ipdgram_listen(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *fd,
unsigned groups, int pf, int ipproto,
int protname) {
const char *portname = argv[1];
union sockaddr_union us;
union sockaddr_union themunion;
union sockaddr_union *them = &themunion;
int socktype = SOCK_DGRAM;
struct pollfd readfd;
bool dofork = false;
pid_t pid;
char *rangename;
char infobuff[256];
unsigned char buff1[1];
socklen_t uslen;
socklen_t themlen;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)", argv[0], argc-1);
}
if (pf == PF_UNSPEC) {
#if WITH_IP4 && WITH_IP6
pf = xioopts.default_ip=='6'?PF_INET6:PF_INET;
#elif WITH_IP6
pf = PF_INET6;
#else
pf = PF_INET;
#endif
}
retropt_socket_pf(opts, &pf);
if (applyopts_single(&fd->stream, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
uslen = socket_init(pf, &us);
retropt_bind(opts, pf, socktype, IPPROTO_UDP,
(struct sockaddr *)&us, &uslen, 1,
fd->stream.para.socket.ip.res_opts[1],
fd->stream.para.socket.ip.res_opts[0]);
if (false) {
;
#if WITH_IP4
} else if (pf == PF_INET) {
us.ip4.sin_port = parseport(portname, ipproto);
#endif
#if WITH_IP6
} else if (pf == PF_INET6) {
us.ip6.sin6_port = parseport(portname, ipproto);
#endif
} else {
Error1("xioopen_ipdgram_listen(): unknown address family %d", pf);
}
retropt_bool(opts, OPT_FORK, &dofork);
if (dofork) {
if (!(xioflags & XIO_MAYFORK)) {
Error("option fork not allowed here");
return STAT_NORETRY;
}
}
#if WITH_IP4 /*|| WITH_IP6*/
if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
if (xioparserange(rangename, pf, &fd->stream.para.socket.range) < 0) {
free(rangename);
return STAT_NORETRY;
}
free(rangename);
fd->stream.para.socket.dorange = true;
}
#endif
#if WITH_LIBWRAP
xio_retropt_tcpwrap(&fd->stream, opts);
#endif /* WITH_LIBWRAP */
if (retropt_ushort(opts, OPT_SOURCEPORT, &fd->stream.para.socket.ip.sourceport)
>= 0) {
fd->stream.para.socket.ip.dosourceport = true;
}
retropt_bool(opts, OPT_LOWPORT, &fd->stream.para.socket.ip.lowport);
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
while (true) { /* we loop with fork or prohibited packets */
/* now wait for some packet on this datagram socket, get its sender
address, connect there, and return */
int one = 1;
char infobuff[256];
union sockaddr_union _sockname;
union sockaddr_union *la = &_sockname; /* local address */
if ((fd->stream.fd = xiosocket(opts, pf, socktype, ipproto, E_ERROR)) < 0) {
return STAT_RETRYLATER;
}
applyopts(fd->stream.fd, opts, PH_PASTSOCKET);
if (Setsockopt(fd->stream.fd, opt_so_reuseaddr.major,
opt_so_reuseaddr.minor, &one, sizeof(one)) < 0) {
Warn6("setsockopt(%d, %d, %d, {%d}, "F_Zd"): %s",
fd->stream.fd, opt_so_reuseaddr.major,
opt_so_reuseaddr.minor, one, sizeof(one), strerror(errno));
}
applyopts_cloexec(fd->stream.fd, opts);
applyopts(fd->stream.fd, opts, PH_PREBIND);
applyopts(fd->stream.fd, opts, PH_BIND);
if (Bind(fd->stream.fd, &us.soa, uslen) < 0) {
Error4("bind(%d, {%s}, "F_Zd"): %s", fd->stream.fd,
sockaddr_info(&us.soa, uslen, infobuff, sizeof(infobuff)),
uslen, strerror(errno));
return STAT_RETRYLATER;
}
/* under some circumstances bind() fills sockaddr with interesting info. */
if (Getsockname(fd->stream.fd, &us.soa, &uslen) < 0) {
Error4("getsockname(%d, %p, {%d}): %s",
fd->stream.fd, &us.soa, uslen, strerror(errno));
}
applyopts(fd->stream.fd, opts, PH_PASTBIND);
Notice1("listening on UDP %s",
sockaddr_info(&us.soa, uslen, infobuff, sizeof(infobuff)));
readfd.fd = fd->stream.fd;
readfd.events = POLLIN|POLLERR;
while (xiopoll(&readfd, 1, NULL) < 0) {
if (errno != EINTR) break;
}
themlen = socket_init(pf, them);
do {
result = Recvfrom(fd->stream.fd, buff1, 1, MSG_PEEK,
&them->soa, &themlen);
} while (result < 0 && errno == EINTR);
if (result < 0) {
Error5("recvfrom(%d, %p, 1, MSG_PEEK, {%s}, {"F_Zu"}): %s",
fd->stream.fd, buff1,
sockaddr_info(&them->soa, themlen, infobuff, sizeof(infobuff)),
themlen, strerror(errno));
return STAT_RETRYLATER;
}
Notice1("accepting UDP connection from %s",
sockaddr_info(&them->soa, themlen, infobuff, sizeof(infobuff)));
if (xiocheckpeer(&fd->stream, them, la) < 0) {
/* drop packet */
char buff[512];
Recv(fd->stream.fd, buff, sizeof(buff), 0); /* drop packet */
Close(fd->stream.fd);
continue;
}
Info1("permitting UDP connection from %s",
sockaddr_info(&them->soa, themlen, infobuff, sizeof(infobuff)));
if (dofork) {
pid = xio_fork(false, E_ERROR);
if (pid < 0) {
return STAT_RETRYLATER;
}
if (pid == 0) { /* child */
break;
}
/* server: continue loop with socket()+recvfrom() */
/* when we dont close this we get awkward behaviour on Linux 2.4:
recvfrom gives 0 bytes with invalid socket address */
if (Close(fd->stream.fd) < 0) {
Info2("close(%d): %s", fd->stream.fd, strerror(errno));
}
Sleep(1); /*! give child a chance to consume the old packet */
continue;
}
break;
}
applyopts(fd->stream.fd, opts, PH_CONNECT);
if ((result = Connect(fd->stream.fd, &them->soa, themlen)) < 0) {
Error4("connect(%d, {%s}, "F_Zd"): %s",
fd->stream.fd,
sockaddr_info(&them->soa, themlen, infobuff, sizeof(infobuff)),
themlen, strerror(errno));
return STAT_RETRYLATER;
}
/* set the env vars describing the local and remote sockets */
if (Getsockname(fd->stream.fd, &us.soa, &uslen) < 0) {
Warn4("getsockname(%d, %p, {%d}): %s",
fd->stream.fd, &us.soa, uslen, strerror(errno));
}
xiosetsockaddrenv("SOCK", &us, uslen, IPPROTO_UDP);
xiosetsockaddrenv("PEER", them, themlen, IPPROTO_UDP);
fd->stream.howtoend = END_SHUTDOWN;
applyopts_fchown(fd->stream.fd, opts);
applyopts(fd->stream.fd, opts, PH_LATE);
if ((result = _xio_openlate(&fd->stream, opts)) < 0)
return result;
return 0;
}
/* creates the listening socket, bind, applies options; waits for incoming
connection, checks its source address and port. Depending on fork option, it
may fork a subprocess.
pf specifies the syntax expected for range option. In the case of generic
socket it is 0 (expecting raw binary data), and the real pf can be obtained
from us->af_family; for other socket types pf == us->af_family
Returns 0 if a connection was accepted; with fork option, this is always in
a subprocess!
Other return values indicate a problem; this can happen in the master
process or in a subprocess.
This function does not retry. If you need retries, handle this in a
loop in the calling function (and always provide the options...)
After fork, we set the forever/retry of the child process to 0
applies and consumes the following option:
PH_INIT, PH_PASTSOCKET, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_EARLY,
PH_PREOPEN, PH_FD, PH_CONNECTED, PH_LATE, PH_LATE2
OPT_FORK, OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_BACKLOG, OPT_RANGE, tcpwrap,
OPT_SOURCEPORT, OPT_LOWPORT, cloexec
*/
int _xioopen_listen(struct single *xfd, int xioflags, struct sockaddr *us, socklen_t uslen,
struct opt *opts, int pf, int socktype, int proto, int level) {
struct sockaddr sa;
socklen_t salen;
int backlog = 5; /* why? 1 seems to cause problems under some load */
char *rangename;
bool dofork = false;
int maxchildren = 0;
char infobuff[256];
char lisname[256];
union sockaddr_union _peername;
union sockaddr_union _sockname;
union sockaddr_union *pa = &_peername; /* peer address */
union sockaddr_union *la = &_sockname; /* local address */
socklen_t pas = sizeof(_peername); /* peer address size */
socklen_t las = sizeof(_sockname); /* local address size */
int result;
retropt_bool(opts, OPT_FORK, &dofork);
if (dofork) {
if (!(xioflags & XIO_MAYFORK)) {
Error("option fork not allowed here");
return STAT_NORETRY;
}
xfd->flags |= XIO_DOESFORK;
}
retropt_int(opts, OPT_MAX_CHILDREN, &maxchildren);
if (! dofork && maxchildren) {
Error("option max-children not allowed without option fork");
return STAT_NORETRY;
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
if ((xfd->fd = xiosocket(opts, us->sa_family, socktype, proto, level)) < 0) {
return STAT_RETRYLATER;
}
applyopts_cloexec(xfd->fd, opts);
applyopts(xfd->fd, opts, PH_PREBIND);
applyopts(xfd->fd, opts, PH_BIND);
if (Bind(xfd->fd, (struct sockaddr *)us, uslen) < 0) {
Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
strerror(errno));
Close(xfd->fd);
return STAT_RETRYLATER;
}
#if WITH_UNIX
if (us->sa_family == AF_UNIX) {
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
}
#endif
/* under some circumstances (e.g., TCP listen on port 0) bind() fills empty
fields that we want to know. */
salen = sizeof(sa);
if (Getsockname(xfd->fd, us, &uslen) < 0) {
Warn4("getsockname(%d, %p, {%d}): %s",
xfd->fd, &us, uslen, strerror(errno));
}
applyopts(xfd->fd, opts, PH_PASTBIND);
#if WITH_UNIX
if (us->sa_family == AF_UNIX) {
/*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
}
#endif /* WITH_UNIX */
#if WITH_IP4 /*|| WITH_IP6*/
if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
if (xioparserange(rangename, pf, &xfd->para.socket.range)
< 0) {
free(rangename);
return STAT_NORETRY;
}
free(rangename);
xfd->para.socket.dorange = true;
}
#endif
#if (WITH_TCP || WITH_UDP) && WITH_LIBWRAP
xio_retropt_tcpwrap(xfd, opts);
#endif /* && (WITH_TCP || WITH_UDP) && WITH_LIBWRAP */
#if WITH_TCP || WITH_UDP
if (retropt_ushort(opts, OPT_SOURCEPORT, &xfd->para.socket.ip.sourceport) >= 0) {
xfd->para.socket.ip.dosourceport = true;
}
retropt_bool(opts, OPT_LOWPORT, &xfd->para.socket.ip.lowport);
#endif /* WITH_TCP || WITH_UDP */
applyopts(xfd->fd, opts, PH_PRELISTEN);
retropt_int(opts, OPT_BACKLOG, &backlog);
if (Listen(xfd->fd, backlog) < 0) {
Error3("listen(%d, %d): %s", xfd->fd, backlog, strerror(errno));
return STAT_RETRYLATER;
}
if (xioopts.logopt == 'm') {
Info("starting accept loop, switching to syslog");
diag_set('y', xioopts.syslogfac); xioopts.logopt = 'y';
} else {
Info("starting accept loop");
}
while (true) { /* but we only loop if fork option is set */
char peername[256];
char sockname[256];
int ps; /* peer socket */
pa = &_peername;
la = &_sockname;
salen = sizeof(struct sockaddr);
do {
/*? int level = E_ERROR;*/
Notice1("listening on %s", sockaddr_info(us, uslen, lisname, sizeof(lisname)));
ps = Accept(xfd->fd, (struct sockaddr *)&sa, &salen);
if (ps >= 0) {
/*0 Info4("accept(%d, %p, {"F_Zu"}) -> %d", xfd->fd, &sa, salen, ps);*/
break; /* success, break out of loop */
}
if (errno == EINTR) {
continue;
}
if (errno == ECONNABORTED) {
Notice4("accept(%d, %p, {"F_socklen"}): %s",
xfd->fd, &sa, salen, strerror(errno));
continue;
}
Msg4(level, "accept(%d, %p, {"F_socklen"}): %s",
xfd->fd, &sa, salen, strerror(errno));
Close(xfd->fd);
return STAT_RETRYLATER;
} while (true);
applyopts_cloexec(ps, opts);
if (Getpeername(ps, &pa->soa, &pas) < 0) {
Warn4("getpeername(%d, %p, {"F_socklen"}): %s",
ps, pa, pas, strerror(errno));
pa = NULL;
}
if (Getsockname(ps, &la->soa, &las) < 0) {
Warn4("getsockname(%d, %p, {"F_socklen"}): %s",
ps, la, las, strerror(errno));
la = NULL;
}
Notice2("accepting connection from %s on %s",
pa?
sockaddr_info(&pa->soa, pas, peername, sizeof(peername)):"NULL",
la?
sockaddr_info(&la->soa, las, sockname, sizeof(sockname)):"NULL");
if (pa != NULL && la != NULL && xiocheckpeer(xfd, pa, la) < 0) {
if (Shutdown(ps, 2) < 0) {
Info2("shutdown(%d, 2): %s", ps, strerror(errno));
}
Close(ps);
continue;
}
if (pa != NULL)
Info1("permitting connection from %s",
sockaddr_info((struct sockaddr *)pa, pas,
infobuff, sizeof(infobuff)));
if (dofork) {
pid_t pid; /* mostly int; only used with fork */
sigset_t mask_sigchld;
/* we must prevent that the current packet triggers another fork;
therefore we wait for a signal from the recent child: USR1
indicates that is has consumed the last packet; CHLD means it has
terminated */
/* block SIGCHLD and SIGUSR1 until parent is ready to react */
sigemptyset(&mask_sigchld);
sigaddset(&mask_sigchld, SIGCHLD);
Sigprocmask(SIG_BLOCK, &mask_sigchld, NULL);
if ((pid = xio_fork(false, level==E_ERROR?level:E_WARN)) < 0) {
Close(xfd->fd);
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
return STAT_RETRYLATER;
}
if (pid == 0) { /* child */
pid_t cpid = Getpid();
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
Info1("just born: child process "F_pid, cpid);
xiosetenvulong("PID", cpid, 1);
if (Close(xfd->fd) < 0) {
Info2("close(%d): %s", xfd->fd, strerror(errno));
}
xfd->fd = ps;
#if WITH_RETRY
/* !? */
xfd->forever = false; xfd->retry = 0;
level = E_ERROR;
#endif /* WITH_RETRY */
break;
}
/* server: continue loop with listen */
/* shutdown() closes the socket even for the child process, but
close() does what we want */
if (Close(ps) < 0) {
Info2("close(%d): %s", ps, strerror(errno));
}
/* now we are ready to handle signals */
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
while (maxchildren) {
if (num_child < maxchildren) break;
Notice("maxchildren are active, waiting");
/* UINT_MAX would even be nicer, but Openindiana works only
with 31 bits */
while (!Sleep(INT_MAX)) ; /* any signal lets us continue */
}
Info("still listening");
} else {
if (Close(xfd->fd) < 0) {
Info2("close(%d): %s", xfd->fd, strerror(errno));
}
xfd->fd = ps;
break;
}
}
applyopts(xfd->fd, opts, PH_FD);
applyopts(xfd->fd, opts, PH_PASTSOCKET);
applyopts(xfd->fd, opts, PH_CONNECTED);
if ((result = _xio_openlate(xfd, opts)) < 0)
return result;
/* set the env vars describing the local and remote sockets */
if (la != NULL) xiosetsockaddrenv("SOCK", la, las, proto);
if (pa != NULL) xiosetsockaddrenv("PEER", pa, pas, proto);
return 0;
}
static int xioopen_socks4_connect(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd,
unsigned groups, int socks4a, int dummy2,
int dummy3) {
/* we expect the form: host:host:port */
struct single *xfd = &xxfd->stream;
struct opt *opts0 = NULL;
const char *sockdname;
char *socksport;
const char *targetname, *targetport;
int pf = PF_UNSPEC;
int ipproto = IPPROTO_TCP;
bool dofork = false;
union sockaddr_union us_sa, *us = &us_sa;
union sockaddr_union them_sa, *them = &them_sa;
socklen_t uslen = sizeof(us_sa);
socklen_t themlen = sizeof(them_sa);
bool needbind = false;
bool lowport = false;
unsigned char buff[BUFF_LEN];
struct socks4 *sockhead = (struct socks4 *)buff;
size_t buflen = sizeof(buff);
int socktype = SOCK_STREAM;
int level;
int result;
if (argc != 4) {
Error1("%s: 3 parameters required", argv[0]);
return STAT_NORETRY;
}
sockdname = argv[1];
targetname = argv[2];
targetport = argv[3];
xfd->howtoend = END_SHUTDOWN;
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_int(opts, OPT_SO_TYPE, &socktype);
retropt_bool(opts, OPT_FORK, &dofork);
result = _xioopen_socks4_prepare(targetport, opts, &socksport, sockhead, &buflen);
if (result != STAT_OK) return result;
result =
_xioopen_ipapp_prepare(opts, &opts0, sockdname, socksport,
&pf, ipproto,
xfd->para.socket.ip.res_opts[1],
xfd->para.socket.ip.res_opts[0],
them, &themlen, us, &uslen,
&needbind, &lowport, socktype);
Notice5("opening connection to %s:%u via socks4 server %s:%s as user \"%s\"",
targetname,
ntohs(sockhead->port),
sockdname, socksport, sockhead->userid);
do { /* loop over failed connect and socks-request attempts */
#if WITH_RETRY
if (xfd->forever || xfd->retry) {
level = E_INFO;
}
else
#endif /* WITH_RETRY */
level = E_ERROR;
/* we try to resolve the target address _before_ connecting to the socks
server: this avoids unnecessary socks connects and timeouts */
result =
_xioopen_socks4_connect0(xfd, targetname, socks4a, sockhead,
(ssize_t *)&buflen, level);
switch (result) {
case STAT_OK:
break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry--) {
if (result == STAT_RETRYLATER) Nanosleep(&xfd->intervall, NULL);
continue;
}
#endif /* WITH_RETRY */
default:
return result;
}
/* this cannot fork because we retrieved fork option above */
result =
_xioopen_connect (xfd,
needbind?(struct sockaddr *)us:NULL, sizeof(*us),
(struct sockaddr *)them, themlen,
opts, pf, socktype, IPPROTO_TCP, lowport, level);
switch (result) {
case STAT_OK:
break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry--) {
if (result == STAT_RETRYLATER) Nanosleep(&xfd->intervall, NULL);
continue;
}
#endif /* WITH_RETRY */
default:
return result;
}
applyopts(xfd->fd, opts, PH_ALL);
if ((result = _xio_openlate(xfd, opts)) < 0)
return result;
result = _xioopen_socks4_connect(xfd, sockhead, buflen, level);
switch (result) {
case STAT_OK:
break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry--) {
if (result == STAT_RETRYLATER) Nanosleep(&xfd->intervall, NULL);
continue;
}
#endif /* WITH_RETRY */
default:
return result;
}
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
#if WITH_RETRY
if (dofork) {
pid_t pid;
int level = E_ERROR;
if (xfd->forever || xfd->retry) {
level = E_WARN; /* most users won't expect a problem here,
so Notice is too weak */
}
while ((pid = xio_fork(false, level)) < 0) {
if (xfd->forever || --xfd->retry) {
Nanosleep(&xfd->intervall, NULL);
continue;
}
return STAT_RETRYLATER;
}
if (pid == 0) { /* child process */
xfd->forever = false;
xfd->retry = 0;
break;
}
/* parent process */
Close(xfd->fd);
Nanosleep(&xfd->intervall, NULL);
dropopts(opts, PH_ALL);
opts = copyopts(opts0, GROUP_ALL);
continue;
} else
#endif /* WITH_RETRY */
{
break;
}
} while (true); /* end of complete open loop - drop out on success */
return 0;
}
static int xioopen_proxy_connect3(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd,
unsigned groups, int dummy1, int dummy2,
int dummy3) {
/* we expect the form: host:host:port */
struct single *xfd = &xxfd->stream;
int rw = (xioflags & XIO_ACCMODE);
struct proxyvars struct_proxyvars = { 0 }, *proxyvars = &struct_proxyvars;
const char *proxyname;
char *proxyport = NULL;
const char *targetname, *targetport;
/* variables to be filled with address option values */
bool dofork = false;
int socktype = SOCK_STREAM;
struct opt *opts0 = NULL;
/* */
int pf = PF_UNSPEC;
union sockaddr_union us_sa, *us = &us_sa;
union sockaddr_union them_sa, *them = &them_sa;
socklen_t uslen = sizeof(us_sa);
socklen_t themlen = sizeof(them_sa);
int ipproto = IPPROTO_TCP;
bool needbind = false;
bool lowport = false;
int level;
int result;
if (xfd->rfd >= 0) {
Error("xioopen_proxy_connect(): proxyname not allowed here");
return STAT_NORETRY;
}
proxyname = argv[1];
targetname = argv[2];
targetport = argv[3];
xfd->howtoshut = XIOSHUT_DOWN;
xfd->howtoclose = XIOCLOSE_CLOSE;
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_int(opts, OPT_SO_TYPE, &socktype);
retropt_bool(opts, OPT_FORK, &dofork);
if (dofork && !(xioflags & XIO_MAYFORK)) {
Error("fork option not allowed by application");
}
if (retropt_string(opts, OPT_PROXYPORT, &proxyport) < 0) {
if ((proxyport = strdup(PROXYPORT)) == NULL) {
errno = ENOMEM; return -1;
}
}
result = _xioopen_proxy_prepare(proxyvars, opts, targetname, targetport);
if (result != STAT_OK) return result;
result =
_xioopen_ipapp_prepare(opts, &opts0, proxyname, proxyport,
&pf, ipproto,
xfd->para.socket.ip.res_opts[1],
xfd->para.socket.ip.res_opts[0],
them, &themlen, us, &uslen,
&needbind, &lowport, socktype);
if (result != STAT_OK) return result;
Notice4("opening connection to %s:%u via proxy %s:%s",
proxyvars->targetaddr, proxyvars->targetport, proxyname, proxyport);
do { /* loop over failed connect and proxy connect attempts */
#if WITH_RETRY
if (xfd->forever || xfd->retry) {
level = E_INFO;
} else
#endif /* WITH_RETRY */
level = E_ERROR;
result =
_xioopen_connect(xfd,
needbind?(struct sockaddr *)us:NULL, sizeof(*us),
(struct sockaddr *)them, themlen,
opts, pf, socktype, IPPROTO_TCP, lowport, level);
switch (result) {
case STAT_OK: break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry--) {
if (result == STAT_RETRYLATER) Nanosleep(&xfd->intervall, NULL);
continue;
}
#endif /* WITH_RETRY */
default:
return result;
}
if (XIOWITHWR(rw)) xfd->wfd = xfd->rfd;
if (!XIOWITHRD(rw)) xfd->rfd = -1;
applyopts(xfd->rfd, opts, PH_ALL);
/*!*/
if ((result = _xio_openlate(xfd, opts)) < 0)
return result;
result = _xioopen_proxy_connect(xfd, proxyvars, level);
switch (result) {
case STAT_OK: break;
#if WITH_RETRY
case STAT_RETRYLATER:
case STAT_RETRYNOW:
if (xfd->forever || xfd->retry--) {
if (result == STAT_RETRYLATER) Nanosleep(&xfd->intervall, NULL);
continue;
}
#endif /* WITH_RETRY */
default:
return result;
}
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
#if WITH_RETRY
if (dofork) {
pid_t pid;
int level = E_ERROR;
if (xfd->forever || xfd->retry) {
level = E_WARN;
}
while ((pid = xio_fork(false, level)) < 0) {
if (xfd->forever || --xfd->retry) {
Nanosleep(&xfd->intervall, NULL); continue;
}
return STAT_RETRYLATER;
}
if (pid == 0) { /* child process */
xfd->forever = false; xfd->retry = 0;
break;
}
/* parent process */
Notice1("forked off child process "F_pid, pid);
Close(xfd->rfd);
Close(xfd->wfd);
Nanosleep(&xfd->intervall, NULL);
dropopts(opts, PH_ALL); opts = copyopts(opts0, GROUP_ALL);
continue;
} else
#endif /* WITH_RETRY */
{
break;
}
} while (true); /* end of complete open loop - drop out on success */
Notice2("successfully connected to %s:%u via proxy",
proxyvars->targetaddr, proxyvars->targetport);
return 0;
}
/* fork for exec/system, but return before exec'ing.
return=0: is child process
return>0: is parent process
return<0: error occurred, assume parent process and no child exists !!!
function formerly known as _xioopen_foxec()
*/
int _xioopen_progcall(int xioflags, /* XIO_RDONLY etc. */
struct single *xfd,
unsigned groups,
struct opt **copts, /* in: opts; out: opts for child */
int *duptostderr,
bool inter, /* is interaddr, not endpoint */
int form /* with interaddr: =2: FDs 1,0--4,3
=1: FDs 1--0 */
) {
struct single *fd = xfd;
struct opt *popts; /* parent process options */
int numleft;
int sv[2], rdpip[2], wrpip[2];
int saverfd = -1, savewfd = -1; /* with inter addr, save assigned right fds */
int rw = (xioflags & XIO_ACCMODE);
char *commname;
int commtype = XIOCOMM_SOCKETPAIRS;
bool usepipes = false;
#if HAVE_PTY
int ptyfd = -1, ttyfd = -1;
bool usebestpty = false; /* use the best available way to open pty */
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
bool useptmx = false; /* use /dev/ptmx or equivalent */
#endif
#if HAVE_OPENPTY
bool useopenpty = false; /* try only openpty */
#endif /* HAVE_OPENPTY */
bool usepty = false; /* any of the pty options is selected */
char ptyname[MAXPTYNAMELEN];
#endif /* HAVE_PTY */
pid_t pid = 0; /* mostly int */
int leftfd[2] = { 0, 1 };
# define fdi (leftfd[0])
# define fdo (leftfd[1])
int rightfd[2] = { 3, 4 };
# define rightin (rightfd[0])
# define rightout (rightfd[1])
short result;
bool withstderr = false;
bool nofork = false;
bool withfork;
popts = moveopts(*copts, GROUP_ALL);
if (applyopts_single(fd, popts, PH_INIT) < 0) return -1;
applyopts2(-1, popts, PH_INIT, PH_EARLY);
retropt_bool(popts, OPT_NOFORK, &nofork);
withfork = !nofork;
if ((retropt_string(popts, OPT_COMMTYPE, &commname)) >= 0) {
if ((commtype = getcommtype(commname)) < 0) {
Error1("bad communication type \"%s\"", commname);
commtype = XIOCOMM_SOCKETPAIRS;
}
}
retropt_bool(popts, OPT_PIPES, &usepipes);
#if HAVE_PTY
retropt_bool(popts, OPT_PTY, &usebestpty);
#if HAVE_OPENPTY
retropt_bool(popts, OPT_OPENPTY, &useopenpty);
#endif
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
retropt_bool(popts, OPT_PTMX, &useptmx);
#endif
usepty = (usebestpty
#if HAVE_OPENPTY
|| useopenpty
#endif
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
|| useptmx
#endif
);
if (usepipes && usepty) {
Warn("_xioopen_foxec(): options \"pipes\" and \"pty\" must not be specified together; ignoring \"pipes\"");
usepipes = false;
}
#endif /* HAVE_PTY */
if (usepty) {
commtype = XIOCOMM_PTY;
} else if (usepipes) {
commtype = XIOCOMM_PIPES;
}
/*------------------------------------------------------------------------*/
/* retrieve options regarding file descriptors */
if (!retropt_int(popts, OPT_LEFTFD, &fdi)) {
fdo = fdi;
}
retropt_int(popts, OPT_LEFTINFD, &fdi);
retropt_int(popts, OPT_LEFTOUTFD, &fdo);
if (!retropt_int(popts, OPT_RIGHTFD, &rightin)) {
rightout = rightin;
}
retropt_int(popts, OPT_RIGHTINFD, &rightin);
retropt_int(popts, OPT_RIGHTOUTFD, &rightout);
/* when the superordinate communication type provides two distinct fds we
cannot pass just one fd to the program */
if (rw == XIO_RDWR && rightin==rightout) {
struct stat rstat, wstat;
if (Fstat(xfd->rfd, &rstat) < 0)
Error2("fstat(%d, ...): %s", xfd->rfd, strerror(errno));
if (Fstat(xfd->wfd, &wstat) < 0)
Error2("fstat(%d, ...): %s", xfd->wfd, strerror(errno));
if (memcmp(&rstat, &wstat, sizeof(rstat))) {
Error("exec/system: your rightfd options require the same FD for both directions but the communication environment provides two different FDs");
}
}
/*------------------------------------------------------------------------*/
if (rw == XIO_WRONLY) {
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SLEEP_SIGTERM;
}
}
if (withfork) {
const char *typename;
if (!(xioflags&XIO_MAYCHILD)) {
Error("fork for exec not allowed in this context");
/*!! free something */
return -1;
}
fd->flags |= XIO_DOESCHILD;
switch (commtype) {
case XIOCOMM_PIPES: typename = "pipes"; break;
#if HAVE_PTY
case XIOCOMM_PTY: typename = "pty"; break;
case XIOCOMM_PTYS: typename = "two pty's"; break;
#endif /* HAVE_PTY */
case XIOCOMM_SOCKETPAIR: typename = "socketpair"; break;
case XIOCOMM_SOCKETPAIRS: typename = "two socketpairs"; break;
#if _WITH_TCP
case XIOCOMM_TCP: typename = "TCP socket pair"; break;
case XIOCOMM_TCP4: typename = "TCP4 socket pair"; break;
case XIOCOMM_TCP4_LISTEN: typename = "TCP4 listen socket pair"; break;
#endif
default: typename = NULL; break;
}
Notice2("forking off child, using %s for %s",
typename, ddirection[rw]);
}
applyopts(-1, popts, PH_PREBIGEN);
if (inter) {
saverfd = xfd->rfd;
savewfd = xfd->wfd;
xfd->howtoshut = XIOSHUT_UNSPEC;
xfd->howtoclose = XIOCLOSE_UNSPEC;
}
if (!withfork) {
/*0 struct single *stream1, *stream2;*/
free(*copts);
*copts = moveopts(popts, GROUP_ALL);
/* what if WE are sock1 ? */
#if 1
if (!(xioflags & XIO_MAYEXEC /* means exec+nofork */)) {
Error("nofork option is not allowed here");
/*!! free something */
return -1;
}
fd->flags |= XIO_DOESEXEC;
#else /*!! */
if (sock1 == NULL) {
Fatal("nofork option must no be applied to first socat address");
}
#endif
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE;
}
#if 0 /*!! */
if (sock1->tag == XIO_TAG_DUAL) {
stream1 = &sock1->dual.stream[0]->stream;
stream2 = &sock1->dual.stream[1]->stream;
} else {
stream1 = &sock1->stream;
stream2 = &sock1->stream;
}
if (stream1->dtype == DATA_READLINE || stream2->dtype == DATA_READLINE ||
stream1->dtype == DATA_OPENSSL || stream2->dtype == DATA_OPENSSL
) {
Error("with option nofork, openssl and readline in address1 do not work");
}
if (stream1->lineterm != LINETERM_RAW ||
stream2->lineterm != LINETERM_RAW ||
stream1->ignoreeof || stream2->ignoreeof) {
Warn("due to option nofork, address1 options for lineterm and igoreeof do not apply");
}
#endif
/*! problem: when fdi==WRFD(sock[0]) or fdo==RDFD(sock[0]) */
if (rw != XIO_WRONLY) {
if (XIO_GETRDFD(sock[0]/*!!!*/) == fdi) {
if (Fcntl_l(fdi, F_SETFD, 0) < 0) {
Warn2("fcntl(%d, F_SETFD, 0): %s", fdi, strerror(errno));
}
if (Dup2(XIO_GETRDFD(sock[0]), fdi) < 0) {
Error3("dup2(%d, %d): %s",
XIO_GETRDFD(sock[0]), fdi, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETRDFD(sock[0]), fdi);*/
} else {
if (Dup2(XIO_GETRDFD(sock[0]), fdi) < 0) {
Error3("dup2(%d, %d): %s",
XIO_GETRDFD(sock[0]), fdi, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETRDFD(sock[0]), fdi);*/
}
}
if (rw != XIO_RDONLY) {
if (XIO_GETWRFD(sock[0]) == fdo) {
if (Fcntl_l(fdo, F_SETFD, 0) < 0) {
Warn2("fcntl(%d, F_SETFD, 0): %s", fdo, strerror(errno));
}
if (Dup2(XIO_GETWRFD(sock[0]), fdo) < 0) {
Error3("dup2(%d, %d): %s)",
XIO_GETWRFD(sock[0]), fdo, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETWRFD(sock[0]), fdo);*/
} else {
if (Dup2(XIO_GETWRFD(sock[0]), fdo) < 0) {
Error3("dup2(%d, %d): %s)",
XIO_GETWRFD(sock[0]), fdo, strerror(errno));
}
/*0 Info2("dup2(%d, %d)", XIO_GETWRFD(sock[0]), fdo);*/
}
}
} else /* withfork */
/* create fd pair(s), set related xfd parameters, and apply options */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
/*!indent*/
#if defined(HAVE_DEV_PTMX)
# define PTMX "/dev/ptmx" /* Linux */
#elif HAVE_DEV_PTC
# define PTMX "/dev/ptc" /* AIX 4.3.3 */
#endif
fd->dtype = XIODATA_PTY;
#if 0
if (fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUTRD_SIGTERM|XIOSHUTWR_SIGHUP;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE_SIGTERM;
}
#endif
if (xiopty(usebestpty||useptmx, &ttyfd, &ptyfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts_cloexec(ptyfd, popts);/*!*/
/* exec:...,pty did not kill child process under some circumstances */
if (fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUTRD_SIGTERM|XIOSHUTWR_SIGHUP;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE_SIGTERM;
}
/* this for parent, was after fork */
applyopts(ptyfd, popts, PH_FD);
applyopts(ptyfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
if (XIOWITHRD(rw)) fd->rfd = ptyfd;
if (XIOWITHWR(rw)) fd->wfd = ptyfd;
/* this for child, was after fork */
applyopts(ttyfd, *copts, PH_FD);
break;
#endif /* HAVE_PTY */
case XIOCOMM_PIPES: {
/*!indent*/
struct opt *popts2, *copts2;
if (rw == XIO_RDWR) {
fd->dtype = XIODATA_2PIPE;
}
if (fd->howtoshut == XIOSHUT_UNSPEC || fd->howtoshut == XIOSHUT_DOWN) {
fd->howtoshut = XIOSHUT_CLOSE;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_CLOSE;
}
if (rw != XIO_WRONLY) {
if (Pipe(rdpip) < 0) {
Error2("pipe(%p): %s", rdpip, strerror(errno));
return -1;
}
}
/*0 Info2("pipe({%d,%d})", rdpip[0], rdpip[1]);*/
/* rdpip[0]: read by socat; rdpip[1]: write by child */
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS))
== NULL) {
return -1;
}
popts2 = copyopts(popts, GROUP_ALL);
copts2 = copyopts(*copts, GROUP_ALL);
if (rw != XIO_WRONLY) {
applyopts_cloexec(rdpip[0], popts);
applyopts(rdpip[0], popts, PH_FD);
applyopts(rdpip[1], *copts, PH_FD);
}
if (rw != XIO_RDONLY) {
if (Pipe(wrpip) < 0) {
Error2("pipe(%p): %s", wrpip, strerror(errno));
return -1;
}
}
/*0 Info2("pipe({%d,%d})", wrpip[0], wrpip[1]);*/
/* wrpip[1]: write by socat; wrpip[0]: read by child */
if (rw != XIO_RDONLY) {
applyopts_cloexec(wrpip[1], popts2);
applyopts(wrpip[1], popts2, PH_FD);
applyopts(wrpip[0], copts2, PH_FD);
}
/* this for parent, was after fork */
if (XIOWITHRD(rw)) fd->rfd = rdpip[0];
if (XIOWITHWR(rw)) fd->wfd = wrpip[1];
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
break;
}
case XIOCOMM_SOCKETPAIR: {
/*!indent*/
int pf = AF_UNIX;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
result = xiosocketpair(popts, pf, SOCK_STREAM, 0, sv);
if (result < 0) {
return -1;
}
if (xfd->howtoshut == XIOSHUT_UNSPEC) {
xfd->howtoshut = XIOSHUT_DOWN;
}
if (xfd->howtoclose == XIOCLOSE_UNSPEC) {
xfd->howtoclose = XIOCLOSE_CLOSE;
}
/*0 Info5("socketpair(%d, %d, %d, {%d,%d})",
d, type, protocol, sv[0], sv[1]);*/
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts(sv[0], *copts, PH_PASTSOCKET);
applyopts(sv[1], popts, PH_PASTSOCKET);
applyopts_cloexec(sv[0], *copts);
applyopts(sv[0], *copts, PH_FD);
applyopts(sv[1], popts, PH_FD);
applyopts(sv[0], *copts, PH_PREBIND);
applyopts(sv[0], *copts, PH_BIND);
applyopts(sv[0], *copts, PH_PASTBIND);
applyopts(sv[1], popts, PH_PREBIND);
applyopts(sv[1], popts, PH_BIND);
applyopts(sv[1], popts, PH_PASTBIND);
Warn1("xio-progcall.c: fd->howtoshut == %d", fd->howtoshut);
if (inter || fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUT_DOWN;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SIGTERM;
}
/* this for parent, was after fork */
/*!!!*/ Warn2("2: fd->rfd==%d, fd->wfd==%d", fd->rfd, fd->wfd);
if (XIOWITHRD(rw)) fd->rfd = sv[0];
if (XIOWITHWR(rw)) fd->wfd = sv[0];
/*!!!*/ Warn2("3: fd->rfd==%d, fd->wfd==%d", fd->rfd, fd->wfd);
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
}
break;
case XIOCOMM_TCP:
case XIOCOMM_TCP4: {
/*!indent*/
int pf = AF_INET;
xiofd_t socatfd, execfd;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
sv[0] = socatfd.rfd; /*!!! r/w */
sv[1] = execfd.wfd;
applyopts(socatfd.rfd, *copts, PH_PASTSOCKET);
applyopts(execfd.rfd, popts, PH_PASTSOCKET);
applyopts_cloexec(sv[0], *copts);
applyopts(sv[0], *copts, PH_FD);
applyopts(sv[1], popts, PH_FD);
applyopts(sv[0], *copts, PH_PREBIND);
applyopts(sv[0], *copts, PH_BIND);
applyopts(sv[0], *copts, PH_PASTBIND);
applyopts(sv[1], popts, PH_PREBIND);
applyopts(sv[1], popts, PH_BIND);
applyopts(sv[1], popts, PH_PASTBIND);
Warn1("xio-progcall.c: fd->howtoshut == %d", fd->howtoshut);
if (inter || fd->howtoshut == XIOSHUT_UNSPEC) {
fd->howtoshut = XIOSHUT_DOWN;
}
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOCLOSE_SIGTERM;
}
/* this for parent, was after fork */
if (XIOWITHRD(rw)) fd->rfd = sv[0];
if (XIOWITHWR(rw)) fd->wfd = sv[0];
applyopts(fd->rfd, popts, PH_FD);
applyopts(fd->rfd, popts, PH_LATE);
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
}
break;
#if LATER
case XIOCOMM_TCP4_LISTEN: {
/*!indent*/
int pf = AF_INET;
xiofd_t socatfd, execfd;
retropt_int(popts, OPT_PROTOCOL_FAMILY, &pf);
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd) < 0) {
return -1;
}
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
applyopts_cloexec(ptyfd, popts);/*!*/
}
break;
#endif /* LATER */
case XIOCOMM_SOCKETPAIRS:
case XIOCOMM_PTYS: {
xiofd_t socatfd, execfd;
struct termios andmask, ormask;
switch (commtype) {
case XIOCOMM_SOCKETPAIRS:
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd, PF_UNIX, SOCK_STREAM, 0) < 0)
return -1;
break;
case XIOCOMM_PTYS:
if (xiocommpair(commtype, XIOWITHWR(rw), XIOWITHRD(rw),
0, &socatfd, &execfd, &andmask, &ormask) < 0)
return -1;
break;
}
free(*copts);
if ((*copts = copyopts(popts, GROUP_TERMIOS|GROUP_FORK)) == NULL) {
return -1;
}
if (socatfd.rfd >= 0) {
applyopts_cloexec(socatfd.rfd, *copts);/*!*/
applyopts(socatfd.rfd, *copts, PH_FD);
applyopts(socatfd.rfd, *copts, PH_LATE);
}
if (applyopts_single(xfd, *copts, PH_LATE) < 0) return -1;
free(*copts);
if ((*copts = moveopts(popts, GROUP_TERMIOS|GROUP_FORK|GROUP_EXEC|GROUP_PROCESS)) == NULL) {
return -1;
}
if (socatfd.wfd >= 0) {
applyopts_cloexec(socatfd.wfd, *copts);/*!*/
applyopts(socatfd.wfd, *copts, PH_FD);
applyopts(socatfd.wfd, *copts, PH_LATE);
}
if (applyopts_single(xfd, *copts, PH_LATE) < 0) return -1;
if (XIOWITHRD(rw)) xfd->rfd = socatfd.rfd;
if (XIOWITHWR(rw)) xfd->wfd = socatfd.wfd;
xfd->dtype = socatfd.dtype;
if (xfd->howtoshut == XIOSHUT_UNSPEC)
xfd->howtoshut = socatfd.howtoshut;
if (fd->howtoclose == XIOCLOSE_UNSPEC) {
fd->howtoclose = XIOWITHRD(rw)?XIOCLOSE_CLOSE_SIGTERM:XIOCLOSE_SLEEP_SIGTERM;
}
wrpip[0] = execfd.rfd;
rdpip[1] = execfd.wfd;
rdpip[0] = socatfd.rfd;
wrpip[1] = socatfd.wfd;
}
break;
default:
Error1("_xioopen_progcall() internal: commtype %d not handled",
commtype);
break;
}
/*0 if ((optpr = copyopts(*copts, GROUP_PROCESS)) == NULL)
return -1;*/
retropt_bool(*copts, OPT_STDERR, &withstderr);
xiosetchilddied(); /* set SIGCHLD handler */
xiosetchilddied(); /* set SIGCHLD handler */
if (withfork) {
sigset_t set, oldset;
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
Sigprocmask(SIG_BLOCK, &set, &oldset); /* disable SIGCHLD */
pid = xio_fork(true, E_ERROR);
if (pid < 0) {
Sigprocmask(SIG_SETMASK, &oldset, NULL);
Error1("fork(): %s", strerror(errno));
return -1;
}
if (pid > 0) {
/* for parent (this is our socat process) */
xiosigchld_register(pid, xiosigaction_child, fd);
Sigprocmask(SIG_SETMASK, &oldset, NULL); /* enable SIGCHLD */
}
if (pid == 0) { /* child */
/* drop parents locks, reset FIPS... */
if (xio_forked_inchild() != 0) {
Exit(1);
}
Sigprocmask(SIG_SETMASK, &oldset, NULL); /* enable SIGCHLD */
}
}
if (!withfork || pid == 0) { /* child */
uid_t user;
gid_t group;
if (withfork) {
if (Signal(SIGCHLD, SIG_IGN) == SIG_ERR) {
Warn1("signal(SIGCHLD, SIG_IGN): %s", strerror(errno));
}
/* dup2() the fds to desired values, close old fds, and apply late
options */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
if (rw != XIO_RDONLY && fdi != ttyfd) {
if (Dup2(ttyfd, fdi) < 0) {
Error3("dup2(%d, %d): %s", ttyfd, fdi, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", ttyfd, fdi);*/
}
if (rw != XIO_WRONLY && fdo != ttyfd) {
if (Dup2(ttyfd, fdo) < 0) {
Error3("dup2(%d, %d): %s", ttyfd, fdo, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", ttyfd, fdo);*/
}
if ((rw == XIO_RDONLY || fdi != ttyfd) &&
(rw == XIO_WRONLY || fdo != ttyfd)) {
applyopts_cloexec(ttyfd, *copts);
}
applyopts(ttyfd, *copts, PH_LATE);
applyopts(ttyfd, *copts, PH_LATE2);
break;
#endif /* HAVE_PTY */
case XIOCOMM_PIPES:
case XIOCOMM_SOCKETPAIRS:
case XIOCOMM_PTYS:
{
/*!indent*/
/* we might have a temporary conflict between what FDs are
currently allocated, and which are to be used. We try to find
a graceful solution via temporary descriptors */
int tmpi, tmpo;
/* needed with system() (not with exec()) */
if (XIOWITHRD(rw)) Close(rdpip[0]);
if (XIOWITHWR(rw)) Close(wrpip[1]);
#if 0
/*! might not be needed */
if (XIOWITHRD(rw)) Close(rdpip[0]);
if (XIOWITHWR(rw)) Close(wrpip[1]);
if (fdi == rdpip[1]) { /* a conflict here */
if ((tmpi = Dup(wrpip[0])) < 0) {
Error2("dup(%d): %s", wrpip[0], strerror(errno));
return -1;
}
/*0 Info2("dup(%d) -> %d", wrpip[0], tmpi);*/
rdpip[1] = tmpi;
}
if (fdo == wrpip[0]) { /* a conflict here */
if ((tmpo = Dup(rdpip[1])) < 0) {
Error2("dup(%d): %s", rdpip[1], strerror(errno));
return -1;
}
/*0 Info2("dup(%d) -> %d", rdpip[1], tmpo);*/
wrpip[0] = tmpo;
}
if (rw != XIO_WRONLY && rdpip[1] != fdo) {
if (Dup2(rdpip[1], fdo) < 0) {
Error3("dup2(%d, %d): %s", rdpip[1], fdo, strerror(errno));
return -1;
}
Close(rdpip[1]);
/*0 Info2("dup2(%d, %d)", rdpip[1], fdo);*/
/*0 applyopts_cloexec(fdo, *copts);*/
}
if (rw != XIO_RDONLY && wrpip[0] != fdi) {
if (Dup2(wrpip[0], fdi) < 0) {
Error3("dup2(%d, %d): %s", wrpip[0], fdi, strerror(errno));
return -1;
}
Close(wrpip[0]);
/*0 Info2("dup2(%d, %d)", wrpip[0], fdi);*/
/*0 applyopts_cloexec(wrpip[0], *copts);*/ /* option is already consumed! */
/* applyopts_cloexec(fdi, *copts);*/ /* option is already consumed! */
}
#else
result = reassignfds(XIOWITHWR(rw)?wrpip[0]:-1,
XIOWITHRD(rw)?rdpip[1]:-1,
fdi, fdo);
if (result < 0) return result;
#endif
applyopts(fdi, *copts, PH_LATE);
applyopts(fdo, *copts, PH_LATE);
applyopts(fdi, *copts, PH_LATE2);
applyopts(fdo, *copts, PH_LATE2);
break;
}
case XIOCOMM_SOCKETPAIR:
case XIOCOMM_TCP:
case XIOCOMM_TCP4:
case XIOCOMM_TCP4_LISTEN:
/*!indent*/
if (rw != XIO_RDONLY && fdi != sv[1]) {
if (Dup2(sv[1], fdi) < 0) {
Error3("dup2(%d, %d): %s", sv[1], fdi, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", sv[1], fdi);*/
}
if (rw != XIO_WRONLY && fdo != sv[1]) {
if (Dup2(sv[1], fdo) < 0) {
Error3("dup2(%d, %d): %s", sv[1], fdo, strerror(errno));
return -1; }
/*0 Info2("dup2(%d, %d)", sv[1], fdo);*/
}
if (fdi != sv[1] && fdo != sv[1]) {
applyopts_cloexec(sv[1], *copts);
Close(sv[1]);
}
applyopts(fdi, *copts, PH_LATE);
applyopts(fdi, *copts, PH_LATE2);
Close(sv[1]);
break;
default:
Error1("_xioopen_progcall() internal: commtype %d not handled",
commtype);
break;
}
/* in case of an inter address, assign the right side FDs (e.g. 3 and 4) */
if (inter) {
Info2("preparing the right side FDs %d and %d for exec process",
rightin, rightout);
result = reassignfds(XIOWITHRD(rw)?saverfd:-1,
XIOWITHWR(rw)?savewfd:-1,
rightin, form==2?rightout:STDOUT_FILENO);
if (result < 0) return result;
if (form == 2) {
Fcntl_l(rightin, F_SETFD, 0);
Fcntl_l(rightout, F_SETFD, 0);
}
}
} /* withfork */
else /* !withfork */ {
applyopts(-1, *copts, PH_LATE);
applyopts(-1, *copts, PH_LATE2);
}
_xioopen_setdelayeduser();
/* set group before user - maybe you are not permitted afterwards */
if (retropt_gidt(*copts, OPT_SETGID, &group) >= 0) {
Setgid(group);
}
if (retropt_uidt(*copts, OPT_SETUID, &user) >= 0) {
Setuid(user);
}
if (withstderr) {
*duptostderr = fdo;
} else {
*duptostderr = -1;
}
return 0; /* indicate child process */
}
/* for parent (this is our socat process) */
Notice1("forked off child process "F_pid, pid);
#if 0
if ((popts = copyopts(*copts,
GROUP_FD|GROUP_TERMIOS|GROUP_FORK|GROUP_SOCKET|GROUP_SOCK_UNIX|GROUP_FIFO)) == NULL)
return STAT_RETRYLATER;
#endif
/* in parent: close fds that are only needed in child */
switch (commtype) {
#if HAVE_PTY
case XIOCOMM_PTY:
if (Close(ttyfd) < 0) {
Info2("close(%d): %s", ttyfd, strerror(errno));
}
break;
#endif /* HAVE_PTY */
case XIOCOMM_SOCKETPAIR:
case XIOCOMM_TCP:
case XIOCOMM_TCP4:
case XIOCOMM_TCP4_LISTEN:
Close(sv[1]);
break;
case XIOCOMM_PIPES:
default:
if (XIOWITHWR(rw)) Close(wrpip[0]);
if (XIOWITHRD(rw)) Close(rdpip[1]);
break;
}
fd->child.pid = pid;
if (applyopts_single(fd, popts, PH_LATE) < 0) return -1;
applyopts_signal(fd, popts);
if ((numleft = leftopts(popts)) > 0) {
Error1("%d option(s) could not be used", numleft);
showleft(popts);
return STAT_NORETRY;
}
if (inter) {
if (XIOWITHRD(rw)) Close(saverfd);
if (XIOWITHWR(rw)) Close(savewfd);
}
return pid; /* indicate parent (main) process */
}