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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (c) 2012 University of Oslo. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stddef.h>
#include <network/UnixSocket.h>
#include <rfb/LogWriter.h>
using namespace network;
using namespace rdr;
static rfb::LogWriter vlog("UnixSocket");
// -=- UnixSocket
UnixSocket::UnixSocket(int sock) : Socket(sock)
{
}
UnixSocket::UnixSocket(const char *path)
{
int sock, err, result;
sockaddr_un addr;
socklen_t salen;
if (strlen(path) >= sizeof(addr.sun_path))
throw SocketException("socket path is too long", ENAMETOOLONG);
// - Create a socket
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock == -1)
throw SocketException("unable to create socket", errno);
// - Attempt to connect
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, path);
salen = sizeof(addr);
while ((result = connect(sock, (sockaddr *)&addr, salen)) == -1) {
err = errno;
close(sock);
break;
}
if (result == -1)
throw SocketException("unable to connect to socket", err);
setFd(sock);
}
const char* UnixSocket::getPeerAddress() {
static struct sockaddr_un addr;
socklen_t salen;
// AF_UNIX only has a single address (the server side).
// Unfortunately we don't know which end we are, so we'll have to
// test a bit.
salen = sizeof(addr);
if (getpeername(getFd(), (struct sockaddr *)&addr, &salen) != 0) {
vlog.error("unable to get peer name for socket");
return "";
}
if (salen > offsetof(struct sockaddr_un, sun_path))
return addr.sun_path;
salen = sizeof(addr);
if (getsockname(getFd(), (struct sockaddr *)&addr, &salen) != 0) {
vlog.error("unable to get local name for socket");
return "";
}
if (salen > offsetof(struct sockaddr_un, sun_path))
return addr.sun_path;
// socketpair() will create unnamed sockets
return "(unnamed UNIX socket)";
}
const char* UnixSocket::getPeerEndpoint() {
return getPeerAddress();
}
UnixListener::UnixListener(const char *path, int mode)
{
struct sockaddr_un addr;
mode_t saved_umask;
int err, result;
if (strlen(path) >= sizeof(addr.sun_path))
throw SocketException("socket path is too long", ENAMETOOLONG);
// - Create a socket
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
throw SocketException("unable to create listening socket", errno);
// - Delete existing socket (ignore result)
unlink(path);
// - Attempt to bind to the requested path
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, path);
saved_umask = umask(0777);
result = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
err = errno;
umask(saved_umask);
if (result < 0) {
close(fd);
throw SocketException("unable to bind listening socket", err);
}
// - Set socket mode
if (chmod(path, mode) < 0) {
err = errno;
close(fd);
throw SocketException("unable to set socket mode", err);
}
listen(fd);
}
UnixListener::~UnixListener()
{
struct sockaddr_un addr;
socklen_t salen = sizeof(addr);
if (getsockname(getFd(), (struct sockaddr *)&addr, &salen) == 0)
unlink(addr.sun_path);
}
Socket* UnixListener::createSocket(int fd_) {
return new UnixSocket(fd_);
}
int UnixListener::getMyPort() {
return 0;
}
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