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tdenetwork/kppp/requester.cpp

366 lines
8.5 KiB

/*
* kPPP: A pppd Front End for the KDE project
*
* $Id$
*
* Copyright (C) 1997,98 Bernd Johannes Wuebben,
* Mario Weilguni,
* Harri Porten
*
*
* This file was contributed by Harri Porten <porten@tu-harburg.de>
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifdef __osf__
#define _XOPEN_SOURCE_EXTENDED 1
#endif
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <sys/uio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#ifdef __osf__
#undef accept
extern "C" unsigned int alarm(unsigned int);
#endif
#ifdef _XPG4_2
extern "C" {
ssize_t sendmsg(int, const struct msghdr *, int);
ssize_t recvmsg(int, struct msghdr *, int);
}
#endif
#include <kdebug.h>
#include <qfile.h>
#include "auth.h"
#include "pppdata.h"
#include "opener.h"
#include "requester.h"
#include "devices.h"
Requester *Requester::rq = 0L;
Requester::Requester(int s) : socket(s) {
assert(rq==0L);
rq = this;
lastStatus = -1;
}
Requester::~Requester() {
}
//
// Receive file name and file descriptors from envoy
//
int Requester::recvFD() {
struct { struct cmsghdr cmsg; int fd; } control;
struct msghdr msg;
struct ResponseHeader response;
struct iovec iov;
int flags = 0, fd, len;
size_t cmsglen;
msg.msg_name = 0L;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
iov.iov_base = IOV_BASE_CAST &response;
iov.iov_len = sizeof(struct ResponseHeader);
#ifdef CMSG_LEN
cmsglen = CMSG_LEN(sizeof(int));
#else
cmsglen = sizeof(struct cmsghdr) + sizeof(int);
#endif
control.cmsg.cmsg_len = cmsglen;
control.cmsg.cmsg_level = SOL_SOCKET;
control.cmsg.cmsg_type = MY_SCM_RIGHTS;
msg.msg_control = (char *) &control;
msg.msg_controllen = control.cmsg.cmsg_len;
fd = -1;
// set alarm in case recvmsg() hangs
signal(SIGALRM, recv_timeout);
alarm(2);
len = recvmsg(socket, &msg, flags);
alarm(0);
signal(SIGALRM, SIG_DFL);
if(len <= 0) {
kdError(5002) << "recvmsg failed " << strerror(errno) << endl;
return -1;
} else if (msg.msg_controllen < cmsglen) {
kdError(5002) << "recvmsg: truncated message " << strerror(errno) << endl;
exit(1);
} else {
#ifdef CMSG_DATA
fd = *((int *)CMSG_DATA(&control.cmsg));
#else
fd = *((int *) control.cmsg.cmsg_data);
#endif
kdDebug(5002) << "response.status: " << response.status << endl;
assert(response.status <= 0);
if(response.status < 0)
return response.status;
}
return fd;
}
bool Requester::recvResponse() {
struct msghdr msg;
struct iovec iov;
struct ResponseHeader response;
int flags = 0, len;
msg.msg_name = 0L;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = 0L;
msg.msg_controllen = 0;
iov.iov_base = IOV_BASE_CAST &response;
iov.iov_len = sizeof(struct ResponseHeader);
kdDebug(5002) << "recvResponse(): waiting for message" << endl;
len = recvmsg(socket, &msg, flags);
kdDebug(5002) << "recvResponse(): received message" << endl;
if (len <= 0) {
if (errno == EINTR)
kdDebug(5002) << "Interrupted system call. Continuing." << endl;
else
perror("recvmsg failed");
} else {
kdDebug(5002) << "response.status: " << response.status << endl;
}
lastStatus = response.status;
return (response.status == 0);
}
int Requester::openModem(const QString & dev) {
struct OpenModemRequest req;
req.header.type = Opener::OpenDevice;
if((req.deviceNum = indexDevice(dev)) < 0)
return -1;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvFD();
}
int Requester::openLockfile(const QString &dev, int flags) {
struct OpenLockRequest req;
req.header.type = Opener::OpenLock;
if((req.deviceNum = indexDevice(dev)) < 0)
return -1;
req.flags = flags;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvFD();
}
bool Requester::removeLockfile() {
struct RemoveLockRequest req;
req.header.type = Opener::RemoveLock;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
int Requester::openResolv(int flags) {
struct OpenResolvRequest req;
req.header.type = Opener::OpenResolv;
req.flags = flags;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvFD();
}
int Requester::openSysLog() {
struct OpenLogRequest req;
req.header.type = Opener::OpenSysLog;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvFD();
}
bool Requester::setSecret(int method, const QString &name, const QString &password) {
assert(name!=0);
assert(password!=0);
if(method == AUTH_PAPCHAP)
return setSecret(AUTH_PAP, name, password) &&
setSecret(AUTH_CHAP, name, password);
struct SetSecretRequest req;
req.header.type = Opener::SetSecret;
switch(method) {
case AUTH_PAP:
req.method = Opener::PAP;
break;
case AUTH_CHAP:
req.method = Opener::CHAP;
break;
default:
return false;
}
strncpy(req.username, QFile::encodeName(name), Opener::MaxStrLen);
req.username[Opener::MaxStrLen] = '\0';
strncpy(req.password, QFile::encodeName(password), Opener::MaxStrLen);
req.password[Opener::MaxStrLen] = '\0';
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
bool Requester::removeSecret(int authMethod) {
struct RemoveSecretRequest req;
req.header.type = Opener::RemoveSecret;
if(authMethod == AUTH_PAP)
req.method = Opener::PAP;
else
if(authMethod == AUTH_CHAP)
req.method = Opener::CHAP;
else
return false;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
bool Requester::setHostname(const QString &name) {
if (name.isEmpty())
return false;
struct SetHostnameRequest req;
req.header.type = Opener::SetHostname;
strncpy(req.name, QFile::encodeName(name), Opener::MaxStrLen);
req.name[Opener::MaxStrLen] = '\0';
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
bool Requester::execPPPDaemon(const QString &arguments) {
struct ExecDaemonRequest req;
req.header.type = Opener::ExecPPPDaemon;
strncpy(req.arguments, QFile::encodeName(arguments), MAX_CMDLEN);
req.arguments[MAX_CMDLEN] = '\0';
sendRequest((struct RequestHeader *) &req, sizeof(req));
if(recvResponse()==0) {
gpppdata.setpppdRunning(true);
return true;
} else
return false;
}
bool Requester::killPPPDaemon() {
struct KillDaemonRequest req;
gpppdata.setpppdRunning(false);
req.header.type = Opener::KillPPPDaemon;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
int Requester::pppdExitStatus()
{
struct PPPDExitStatusRequest req;
req.header.type = Opener::PPPDExitStatus;
sendRequest((struct RequestHeader *) &req, sizeof(req));
return recvResponse();
}
bool Requester::stop() {
struct StopRequest req;
req.header.type = Opener::Stop;
sendRequest((struct RequestHeader *) &req, sizeof(req));
// return recvResponse();
return true;
}
bool Requester::sendRequest(struct RequestHeader *request, int len) {
request->len = len - sizeof(struct RequestHeader);
struct msghdr msg;
struct iovec iov;
iov.iov_base = IOV_BASE_CAST request;
iov.iov_len = len;
msg.msg_name = 0L;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = 0L;
msg.msg_controllen = 0;
kdDebug(5002) << "sendRequest: trying to send msg type " << request->type << endl;
sendmsg(socket, &msg, 0);
kdDebug(5002) << "sendRequest: sent message" << endl;
return true;
}
int Requester::indexDevice(const QString &dev) {
int index = -1;
for(int i = 0; devices[i]; i++)
if (dev == devices[i])
index = i;
return index;
}
void recv_timeout(int) {
kdDebug(5002) << "timeout()" << endl;
}