jack2/common/JackSocket.cpp

/*
Copyright (C) 2004-2006 Grame  
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public License
  along with this program; if not, write to the Free Software 
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

#include "JackSocket.h"
#include "JackError.h"
#include <string.h>

namespace Jack
{

JackClientSocket::JackClientSocket(int socket): fSocket(socket)
{}

void JackClientSocket::SetReadTimeOut(long sec)
{
    struct timeval timout;
    timout.tv_sec = sec;
    timout.tv_usec = 0;
    if (setsockopt(fSocket, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timout, sizeof(timeval)) < 0) {
        JackLog("setsockopt SO_RCVTIMEO fd = %ld err = (%s)\n", fSocket, strerror(errno));
    }
}

void JackClientSocket::SetWriteTimeOut(long sec)
{
    struct timeval timout;
    timout.tv_sec = sec ;
    timout.tv_usec = 0;
    if (setsockopt(fSocket, SOL_SOCKET, SO_SNDTIMEO, (const char*)&timout, sizeof(timeval)) < 0) {
        JackLog("setsockopt SO_SNDTIMEO fd = %ld err = (%s)\n", fSocket, strerror(errno));
    }
}

int JackClientSocket::Connect(const char* dir, const char* name, int which) // A revoir : utilisation de "which"
{
    struct sockaddr_un addr;

    if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
        jack_error("Cannot create socket (%s)", strerror(errno));
        return -1;
    }

    addr.sun_family = AF_UNIX;
    snprintf(addr.sun_path, sizeof(addr.sun_path) - 1, "%s/jack_%s", dir, name);

    JackLog("Connect: addr.sun_path %s\n", addr.sun_path);

    if (connect(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
        jack_error("Cannot connect to server socket (%s)", strerror(errno));
        close(fSocket);
        return -1;
    }

#ifdef __APPLE__
    int on = 1 ;
    if (setsockopt(fSocket, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&on, sizeof(on)) < 0) {
        JackLog("setsockopt SO_NOSIGPIPE fd = %ld err = %s\n", fSocket, strerror(errno));
    }
#endif

    return 0;
}

int JackClientSocket::Connect(const char* dir, int which)
{
    struct sockaddr_un addr;

    if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
        jack_error("Cannot create socket (%s)", strerror(errno));
        return -1;
    }

    addr.sun_family = AF_UNIX;
    snprintf(addr.sun_path, sizeof(addr.sun_path) - 1, "%s/jack_%d", dir, which);

    JackLog("Connect: addr.sun_path %s\n", addr.sun_path);

    if (connect(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
        jack_error("Cannot connect to server socket (%s)", strerror(errno));
        close(fSocket);
        return -1;
    }

#ifdef __APPLE__
    int on = 1 ;
    if (setsockopt(fSocket, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&on, sizeof(on)) < 0) {
        JackLog("setsockopt SO_NOSIGPIPE fd = %ld err = %s\n", fSocket, strerror(errno));
    }
#endif

    return 0;
}

int JackClientSocket::Close()
{
    JackLog("JackClientSocket::Close\n");
    //shutdown(fSocket, SHUT_RDWR);
    if (fSocket > 0) {
        close(fSocket);
        fSocket = -1;
        return 0;
    } else {
        return -1;
    }
}

int JackClientSocket::Read(void* data, int len)
{
    int len1;

    if ((len1 = read(fSocket, data, len)) != len) {
        jack_error("Cannot read socket %d %d (%s)", len, len1, strerror(errno));
        if (errno == EWOULDBLOCK) {
            JackLog("JackClientSocket::Read time out\n");
            return 0;
        } else {
            return -1;
        }
    } else {
        return 0;
    }
}

int JackClientSocket::Write(void* data, int len)
{
    if (write(fSocket, data, len) != len) {
        jack_error("Cannot write socket fd %ld (%s)", fSocket, strerror(errno));
        return -1;
    } else {
        return 0;
    }
}

/*
void
jack_cleanup_files ()
{
	DIR *dir;
	struct dirent *dirent;
 
	// its important that we remove all files that jackd creates
	//   because otherwise subsequent attempts to start jackd will
	//   believe that an instance is already running.
	
 
	if ((dir = opendir (jack_server_dir)) == NULL) {
		fprintf (stderr, "jack(%d): cannot open jack FIFO directory "
			 "(%s)\n", getpid(), strerror (errno));
		return;
	}
 
	while ((dirent = readdir (dir)) != NULL) {
		if (strncmp (dirent->d_name, "jack-", 5) == 0 ||
		    strncmp (dirent->d_name, "jack_", 5) == 0) {
			char fullpath[PATH_MAX+1];
			snprintf (fullpath, sizeof (fullpath), "%s/%s",
				  jack_server_dir, dirent->d_name);
			unlink (fullpath);
		} 
	}
 
	closedir (dir);
}
*/

int JackServerSocket::Bind(const char* dir, const char* name, int which) // A revoir : utilisation de "which"
{
    struct sockaddr_un addr;

    if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
        jack_error("Cannot create server socket (%s)", strerror(errno));
        return -1;
    }

    addr.sun_family = AF_UNIX;

    // TO CORRECT: always reuse the same name for now...
    snprintf(addr.sun_path, sizeof(addr.sun_path) - 1, "%s/jack_%s", dir, name);
    snprintf(fName, sizeof(addr.sun_path) - 1, "%s/jack_%s", dir, name);
    /*
    if (access(addr.sun_path, F_OK) == 0) {
    	goto error;
    }
    */

    JackLog("Bind: addr.sun_path %s\n", addr.sun_path);
    unlink(fName); // Security...

    JackLog("Bind: addr.sun_path %s\n", addr.sun_path);
    unlink(fName); // Security...

    if (bind(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
        jack_error("Cannot bind server to socket (%s)", strerror(errno));
        goto error;
    }

    if (listen(fSocket, 1) < 0) {
        jack_error("Cannot enable listen on server socket (%s)", strerror(errno));
        goto error;
    }

    return 0;

error:
    unlink(fName);
    close(fSocket);
    return -1;
}

int JackServerSocket::Bind(const char* dir, int which) // A revoir : utilisation de "which"
{
    struct sockaddr_un addr;

    if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
        jack_error ("Cannot create server socket (%s)", strerror(errno));
        return -1;
    }

    addr.sun_family = AF_UNIX;

    /*
    for (int i = 0; i < 999; i++) {
    	snprintf(addr.sun_path, sizeof(addr.sun_path) - 1,"%s/jack_%d", dir, i);
    	snprintf(fName, sizeof(addr.sun_path) - 1,"%s/jack_%d", dir, i);
    	if (access(addr.sun_path, F_OK) != 0) {
    		break;
    	}
    }
    */

    // TO CORRECT: always reuse the same name for now...
    snprintf(addr.sun_path, sizeof(addr.sun_path) - 1, "%s/jack_%d", dir, which);
    snprintf(fName, sizeof(addr.sun_path) - 1, "%s/jack_%d", dir, which);
    /*
    if (access(addr.sun_path, F_OK) == 0) {
    	goto error;
    }
    */

    JackLog("Bind: addr.sun_path %s\n", addr.sun_path);
    unlink(fName); // Security...

    if (bind(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
        jack_error("Cannot bind server to socket (%s)", strerror(errno));
        goto error;
    }

    if (listen(fSocket, 1) < 0) {
        jack_error("Cannot enable listen on server socket (%s)", strerror(errno));
        goto error;
    }

    return 0;

error:
    unlink(fName);
    close(fSocket);
    return -1;
}

JackClientSocket* JackServerSocket::Accept()
{
    struct sockaddr_un client_addr;
    socklen_t client_addrlen;

    memset(&client_addr, 0, sizeof(client_addr));
    client_addrlen = sizeof(client_addr);

    int fd = accept(fSocket, (struct sockaddr*) & client_addr, &client_addrlen);
    if (fd < 0) {
        jack_error("Cannot accept new connection (%s)", strerror(errno));
        return 0;
    } else {
        return new JackClientSocket(fd);
    }
}

int JackServerSocket::Close()
{
    JackLog("JackServerSocket::Close %s\n", fName);
    //shutdown(fSocket, SHUT_RDWR);
    if (fSocket > 0) {
        //shutdown(fSocket, SHUT_RDWR);
        close(fSocket);
        unlink(fName);
        fSocket = -1;
        return 0;
    } else {
        return -1;
    }
}

} // end of namespace