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tdelibs/kdecore/ksocks.cpp

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/* This file is part of the KDE libraries
Copyright (C) 2001-2003 George Staikos <staikos@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <tqfile.h>
#include <tqstring.h>
#include <tqmap.h>
#include <klocale.h>
#include <kdebug.h>
#include "klibloader.h"
#include <kconfig.h>
#include <kapplication.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include "ksocks.h"
// DO NOT RE-ORDER THESE.
enum SymbolKeys {
S_SOCKSinit = 0,
S_connect = 1,
S_read = 2,
S_write = 3,
S_recvfrom = 4,
S_sendto = 5,
S_recv = 6,
S_send = 7,
S_getsockname = 8,
S_getpeername = 9,
S_accept = 10,
S_select = 11,
S_listen = 12,
S_bind = 13
};
extern "C" {
// Function pointer table
static int (*F_SOCKSinit) (char *) = 0L;
static int (*F_connect) (int, const struct sockaddr *, ksocklen_t) = 0L;
static signed long int (*F_read) (int, void *, unsigned long int) = 0L;
static signed long int (*F_write) (int, const void *, unsigned long int) = 0L;
static int (*F_recvfrom) (int, void *, unsigned long int, int, struct sockaddr *,
ksocklen_t *) = 0L;
static int (*F_sendto) (int, const void *, unsigned long int, int,
const struct sockaddr *, ksocklen_t) = 0L;
static int (*F_recv) (int, void *, unsigned long int, int) = 0L;
static int (*F_send) (int, const void *, unsigned long int, int) = 0L;
static int (*F_getsockname) (int, struct sockaddr *, ksocklen_t *) = 0L;
static int (*F_getpeername) (int, struct sockaddr *, ksocklen_t *) = 0L;
static int (*F_accept) (int, struct sockaddr *, ksocklen_t *) = 0L;
static int (*F_select) (int, fd_set *, fd_set *, fd_set *,
struct timeval *) = 0L;
static int (*F_listen) (int, int) = 0L;
static int (*F_bind) (int, const struct sockaddr *, ksocklen_t) = 0L;
}
class KSocksTable {
public:
KSocksTable();
virtual ~KSocksTable();
// The name of each symbol and it's SOCKS replacement
TQMap<SymbolKeys,TQString> symbols;
// The name of this library
TQString myname;
bool hasWorkingAsyncConnect;
};
KSocksTable::KSocksTable() : myname("Unknown"), hasWorkingAsyncConnect(true) {
}
KSocksTable::~KSocksTable() {
}
/*
* How to add support for a new SOCKS package.
*
* 1) Subclass KSocksTable as is done below and write out all the symbols
* 1.b) Give the class a "myname"
* 2) Make sure that all possible library names are written into the
* _libNames string list. Don't forget that different OSes name shared
* libraries differently. Expect .so, .sl, .a (!) (AIX does this).
* 3) Find a unique symbol in the library that we can use to identify that
* library and write out the test case in the constructor
* 4) Make necessary changes to the KControl module in kdebase/kcontrol/....
* 5) TEST!
*
*/
//////////////////////////////////////////////////////////////////
/////// Define each library symbol table here ///////
//////////////////////////////////////////////////////////////////
//
// Support for NEC SOCKS client
//
class KNECSocksTable : public KSocksTable {
public:
KNECSocksTable();
virtual ~KNECSocksTable();
};
KNECSocksTable::KNECSocksTable() : KSocksTable() {
myname = i18n("NEC SOCKS client");
symbols.insert(S_SOCKSinit, "SOCKSinit");
symbols.insert(S_connect, "connect");
symbols.insert(S_read, "read");
symbols.insert(S_write, "write");
symbols.insert(S_recvfrom, "recvfrom");
symbols.insert(S_sendto, "sendto");
symbols.insert(S_recv, "recv");
symbols.insert(S_send, "send");
symbols.insert(S_getsockname, "getsockname");
symbols.insert(S_getpeername, "getpeername");
symbols.insert(S_accept, "accept");
symbols.insert(S_select, "select");
symbols.insert(S_listen, "listen");
symbols.insert(S_bind, "bind");
}
KNECSocksTable::~KNECSocksTable() {
}
//
// Support for Dante SOCKS client
//
class KDanteSocksTable : public KSocksTable {
public:
KDanteSocksTable();
virtual ~KDanteSocksTable();
};
KDanteSocksTable::KDanteSocksTable() : KSocksTable() {
hasWorkingAsyncConnect = false;
myname = i18n("Dante SOCKS client");
symbols.insert(S_SOCKSinit, "SOCKSinit");
symbols.insert(S_connect, "Rconnect");
symbols.insert(S_read, "Rread");
symbols.insert(S_write, "Rwrite");
symbols.insert(S_recvfrom, "Rrecvfrom");
symbols.insert(S_sendto, "Rsendto");
symbols.insert(S_recv, "Rrecv");
symbols.insert(S_send, "Rsend");
symbols.insert(S_getsockname, "Rgetsockname");
symbols.insert(S_getpeername, "Rgetpeername");
symbols.insert(S_accept, "Raccept");
symbols.insert(S_select, "Rselect");
symbols.insert(S_listen, "Rlisten");
symbols.insert(S_bind, "Rbind");
}
KDanteSocksTable::~KDanteSocksTable() {
}
//////////////////////////////////////////////////////////////////
/////// End of all symbol table definitions ///////
//////////////////////////////////////////////////////////////////
KSocks *KSocks::_me = 0;
#ifdef __CYGWIN__
bool KSocks::_disabled = true;
#else
bool KSocks::_disabled = false;
#endif
static KStaticDeleter<KSocks> med;
void KSocks::disable()
{
if (!_me)
_disabled = true;
}
KSocks *KSocks::self() {
// Note that we don't use a static deleter here. It makes no sense and tends to cause crashes.
if (!_me) {
if (kapp) {
KConfigGroup cfg(kapp->config(), "Socks");
_me = new KSocks(&cfg);
} else {
_disabled = true;
_me = new KSocks(0);
}
}
return _me;
}
void KSocks::setConfig(KConfigBase *config)
{
// We can change the config from disabled to enabled
// but not the other way around.
if (_me && _disabled) {
delete _me;
_me = 0;
_disabled = false;
}
if (!_me)
_me = new KSocks(config);
}
bool KSocks::activated() { return (_me != 0L); }
KSocks::KSocks(KConfigBase *config) : _socksLib(0L), _st(0L) {
_hasSocks = false;
_useSocks = false;
if (!config)
return;
if (!(config->readBoolEntry("SOCKS_enable", false))) {
_disabled = true;
}
if (_disabled)
return;
_libPaths << ""
<< "/usr/" SYSTEM_LIBDIR "/"
<< "/usr/lib/"
<< "/usr/local/" SYSTEM_LIBDIR "/"
<< "/usr/local/lib/"
<< "/usr/local/socks5/" SYSTEM_LIBDIR "/"
<< "/usr/local/socks5/lib/"
<< "/opt/socks5/" SYSTEM_LIBDIR "/"
<< "/opt/socks5/lib/";
_libNames << "libsocks.so" // Dante
<< "libdsocksd.so.0" // Dante 1.1.14-2 on
// Debian unstable 17-12-2003
<< "libsocks5.so" // ?
<< "libsocks5_sh.so"; // NEC
// Add the custom library paths here
TQStringList newlibs = config->readListEntry("SOCKS_lib_path");
for (TQStringList::Iterator it = newlibs.begin();
it != newlibs.end();
++it) {
TQString thisone = *it;
if (thisone[thisone.length()-1] != '/') thisone += "/";
_libPaths << thisone;
kdDebug(171) << "KSocks added a new library path: " << thisone << endl;
}
// Load the proper libsocks and KSocksTable
KLibLoader *ll = KLibLoader::self();
int _meth = config->readNumEntry("SOCKS_method", 1);
/**** Current methods
* 1) Autodetect (read: any) 2) NEC
* 3) Dante 4) Custom
*/
if (_meth == 4) { // try to load^H^H^H^Hguess at a custom library
_socksLib = ll->library(config->readPathEntry("SOCKS_lib").latin1());
if (_socksLib && _socksLib->symbol("Rconnect")) { // Dante compatible?
_st = new KDanteSocksTable;
_useSocks = true;
_hasSocks = true;
} else if (_socksLib && _socksLib->symbol("connect")) { // NEC compatible?
_st = new KNECSocksTable;
_useSocks = true;
_hasSocks = true;
} else if (_socksLib) {
_socksLib->unload();
_socksLib = 0L;
}
} else // leave this here "else for {}"
for (TQStringList::Iterator pit = _libPaths.begin();
!_hasSocks && pit != _libPaths.end();
++pit)
for (TQStringList::Iterator it = _libNames.begin();
it != _libNames.end();
++it) {
_socksLib = ll->library((*pit + *it).latin1());
if (_socksLib) {
if ((_meth == 1 || _meth == 2) &&
_socksLib->symbol("S5LogShowThreadIDS") != 0L) { // NEC SOCKS
kdDebug(171) << "Found NEC SOCKS" << endl;
_st = new KNECSocksTable;
_useSocks = true;
_hasSocks = true;
break;
} else if ((_meth == 1 || _meth == 3) &&
_socksLib->symbol("sockaddr2ruleaddress") != 0L) { //Dante
kdDebug(171) << "Found Dante SOCKS" << endl;
_st = new KDanteSocksTable;
_useSocks = true;
_hasSocks = true;
break;
} else {
_socksLib->unload();
_socksLib = 0L;
}
}
}
// Load in all the symbols
if (_st) {
for (TQMap<SymbolKeys,TQString>::Iterator it = _st->symbols.begin();
it != _st->symbols.end();
++it) {
switch(it.key()) {
case S_SOCKSinit:
F_SOCKSinit = (int (*)(char *))
_socksLib->symbol(it.data().latin1());
break;
case S_connect:
F_connect = (int (*)(int, const struct sockaddr *, ksocklen_t))
_socksLib->symbol(it.data().latin1());
break;
case S_read:
F_read = (signed long int (*)(int, void *, unsigned long int))
_socksLib->symbol(it.data().latin1());
break;
case S_write:
F_write = (signed long int (*)(int, const void *, unsigned long int))
_socksLib->symbol(it.data().latin1());
break;
case S_recvfrom:
F_recvfrom = (int (*)(int, void *, unsigned long int, int,
struct sockaddr *, ksocklen_t *))
_socksLib->symbol(it.data().latin1());
break;
case S_sendto:
F_sendto = (int (*)(int, const void *, unsigned long int, int,
const struct sockaddr *, ksocklen_t))
_socksLib->symbol(it.data().latin1());
break;
case S_recv:
F_recv = (int (*)(int, void *, unsigned long int, int))
_socksLib->symbol(it.data().latin1());
break;
case S_send:
F_send = (int (*)(int, const void *, unsigned long int, int))
_socksLib->symbol(it.data().latin1());
break;
case S_getsockname:
F_getsockname = (int (*)(int, struct sockaddr *, ksocklen_t *))
_socksLib->symbol(it.data().latin1());
break;
case S_getpeername:
F_getpeername = (int (*)(int, struct sockaddr *, ksocklen_t *))
_socksLib->symbol(it.data().latin1());
break;
case S_accept:
F_accept = (int (*)(int, struct sockaddr *, ksocklen_t *))
_socksLib->symbol(it.data().latin1());
break;
case S_select:
F_select = (int (*)(int, fd_set *, fd_set *, fd_set *, struct timeval *))
_socksLib->symbol(it.data().latin1());
break;
case S_listen:
F_listen = (int (*)(int, int))
_socksLib->symbol(it.data().latin1());
break;
case S_bind:
F_bind = (int (*)(int, const struct sockaddr *, ksocklen_t))
_socksLib->symbol(it.data().latin1());
break;
default:
kdDebug(171) << "KSocks got a symbol it doesn't know about!" << endl;
break;
}
}
// Now we check for the critical stuff.
if (F_SOCKSinit) {
int rc = (*F_SOCKSinit)((char *)"KDE");
if (rc != 0)
stopSocks();
else kdDebug(171) << "SOCKS has been activated!" << endl;
} else {
stopSocks();
}
}
}
KSocks::~KSocks() {
stopSocks();
_me = 0;
}
void KSocks::die() {
if (_me == this) {
_me = 0;
delete this;
}
}
void KSocks::stopSocks() {
if (_hasSocks) {
// This library doesn't even provide the basics.
// It's probably broken. Let's abort.
_useSocks = false;
_hasSocks = false;
if (_socksLib) {
_socksLib->unload();
_socksLib = 0L;
}
delete _st;
_st = 0L;
}
}
bool KSocks::usingSocks() {
return _useSocks;
}
bool KSocks::hasSocks() {
return _hasSocks;
}
void KSocks::disableSocks() {
_useSocks = false;
}
void KSocks::enableSocks() {
if (_hasSocks)
_useSocks = true;
}
bool KSocks::hasWorkingAsyncConnect()
{
return (_useSocks && _st) ? _st->hasWorkingAsyncConnect : true;
}
/*
* REIMPLEMENTED FUNCTIONS FROM LIBC
*
*/
int KSocks::connect (int sockfd, const sockaddr *serv_addr,
ksocklen_t addrlen) {
if (_useSocks && F_connect)
return (*F_connect)(sockfd, serv_addr, addrlen);
else return ::connect(sockfd, (sockaddr*) serv_addr, (socklen_t)addrlen);
}
signed long int KSocks::read (int fd, void *buf, unsigned long int count) {
if (_useSocks && F_read)
return (*F_read)(fd, buf, count);
else return ::read(fd, buf, count);
}
signed long int KSocks::write (int fd, const void *buf, unsigned long int count) {
if (_useSocks && F_write)
return (*F_write)(fd, buf, count);
else return ::write(fd, buf, count);
}
int KSocks::recvfrom (int s, void *buf, unsigned long int len, int flags,
sockaddr *from, ksocklen_t *fromlen) {
if (_useSocks && F_recvfrom) {
return (*F_recvfrom)(s, buf, len, flags, from, fromlen);
} else {
socklen_t casted_len = (socklen_t) *fromlen;
int rc = ::recvfrom(s, (char*) buf, len, flags, from, &casted_len);
*fromlen = casted_len;
return rc;
}
}
int KSocks::sendto (int s, const void *msg, unsigned long int len, int flags,
const sockaddr *to, ksocklen_t tolen) {
if (_useSocks && F_sendto)
return (*F_sendto)(s, msg, len, flags, to, tolen);
else return ::sendto(s, (char*) msg, len, flags, to, (socklen_t)tolen);
}
int KSocks::recv (int s, void *buf, unsigned long int len, int flags) {
if (_useSocks && F_recv)
return (*F_recv)(s, buf, len, flags);
else return ::recv(s, (char*) buf, len, flags);
}
int KSocks::send (int s, const void *msg, unsigned long int len, int flags) {
if (_useSocks && F_send)
return (*F_send)(s, msg, len, flags);
else return ::send(s, (char*) msg, len, flags);
}
int KSocks::getsockname (int s, sockaddr *name, ksocklen_t *namelen) {
if (_useSocks && F_getsockname) {
return (*F_getsockname)(s, name, namelen);
} else {
socklen_t casted_len = *namelen;
int rc = ::getsockname(s, name, &casted_len);
*namelen = casted_len;
return rc;
}
}
int KSocks::getpeername (int s, sockaddr *name, ksocklen_t *namelen) {
if (_useSocks && F_getpeername) {
return (*F_getpeername)(s, name, namelen);
} else {
socklen_t casted_len = *namelen;
int rc = ::getpeername(s, name, &casted_len);
*namelen = casted_len;
return rc;
}
}
int KSocks::accept (int s, sockaddr *addr, ksocklen_t *addrlen) {
if (_useSocks && F_accept) {
return (*F_accept)(s, addr, addrlen);
} else {
socklen_t casted_len = *addrlen;
int rc = ::accept(s, addr, &casted_len);
*addrlen = casted_len;
return rc;
}
}
int KSocks::select (int n, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, struct timeval *timeout) {
if (_useSocks && F_select)
return (*F_select)(n, readfds, writefds, exceptfds, timeout);
else return ::select(n, readfds, writefds, exceptfds, timeout);
}
int KSocks::listen (int s, int backlog) {
if (_useSocks && F_listen)
return (*F_listen)(s, backlog);
else return ::listen(s, backlog);
}
int KSocks::bind (int sockfd, const sockaddr *my_addr, ksocklen_t addrlen) {
if (_useSocks && F_bind)
return (*F_bind)(sockfd, my_addr, addrlen);
else return ::bind(sockfd, my_addr, (socklen_t)addrlen);
}
int KSocks::bind (int sockfd, sockaddr *my_addr, ksocklen_t addrlen) {
if (_useSocks && F_bind)
return (*F_bind)(sockfd, my_addr, addrlen);
else return ::bind(sockfd, my_addr, (socklen_t)addrlen);
}
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