libclsync.c

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/*
    libclsyncmgr - clsync control socket API
 
    Copyright (C) 2014  Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
 
    This program 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 3 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 General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#define LIBCLSYNC
 
#include <errno.h>
#include <stdlib.h>
#include <string.h> // for memset
#include <sys/un.h> // for "struct sockaddr_un"
 
#include "configuration.h"
#include "error.h"
#include "libclsync.h"
#include "malloc.h"
#include "socket.h"
 
int libproc_procclsyncsock ( socket_sockthreaddata_t *arg, sockcmd_t *sockcmd_p )
{
    clsyncproc_t        *proc_p     = arg->arg;
    clsyncsock_t        *clsyncsock_p = proc_p->sock_p;
    clsyncsock_procfunct_t   procfunct    = proc_p->procfunct;
#ifdef PARANOID
 
    if ( procfunct == NULL ) {
        error ( "procfunct == NULL" );
        return 0;
    }
 
#endif
 
    if ( procfunct ( arg, sockcmd_p ) )
        switch ( sockcmd_p->cmd_id ) {
            default:
                socket_sendinvalid ( clsyncsock_p, sockcmd_p );
                break;
        }
 
    return 0;
}
 
static inline int _clsync_connect_setthreaddata ( socket_sockthreaddata_t *threaddata_p, clsyncproc_t *proc_p, sockprocflags_t flags )
{
    threaddata_p->procfunct     =  libproc_procclsyncsock;
    threaddata_p->clsyncsock_p  =  proc_p->sock_p;
    threaddata_p->arg       =  proc_p;
    threaddata_p->running       =  NULL;
    threaddata_p->authtype      =  SOCKAUTH_NULL;
    threaddata_p->flags     =  flags;
    threaddata_p->freefunct_arg =  free;
    return 0;
}
 
static inline clsyncproc_t *_clsync_x_unix (
    const char *const socket_path,
    clsyncsock_procfunct_t procfunct,
    sockprocflags_t flags,
    const char *const action,
    clsyncsock_t * ( *socket_x_unix ) ( const char *const )
)
{
    if ( procfunct == NULL ) {
        errno = EINVAL;
        return NULL;
    }
 
    clsyncproc_t *proc_p = xmalloc ( sizeof ( *proc_p ) );
    memset ( proc_p, 0, sizeof ( *proc_p ) );
    proc_p->sock_p = socket_x_unix ( socket_path );
 
    if ( proc_p->sock_p == NULL ) {
        free ( proc_p );
 
        if ( errno == EUSERS ) {
            error ( "clsync_%s_unix(): Too many connections.", action );
            return NULL;
        }
 
        error ( "clsync_%s_unix(): Cannot socket_%s_unix()",
                action, action );
        return NULL;
    }
 
    socket_sockthreaddata_t *threaddata_p = socket_thread_attach ( proc_p->sock_p );
 
    if ( threaddata_p == NULL ) {
        socket_close ( proc_p->sock_p );
        free ( proc_p );
        return NULL;
    }
 
    _clsync_connect_setthreaddata ( threaddata_p, proc_p, flags );
    proc_p->procfunct = procfunct;
    socket_thread_start ( threaddata_p );
    return proc_p;
}
 
clsyncproc_t *clsync_listen_unix ( const char *const socket_path, clsyncsock_procfunct_t procfunct, sockprocflags_t flags )
{
    return _clsync_x_unix ( socket_path, procfunct, flags, "listen",  socket_listen_unix );
}
 
 
clsyncproc_t *clsync_connect_unix ( const char *const socket_path, clsyncsock_procfunct_t procfunct, sockprocflags_t flags )
{
    return _clsync_x_unix ( socket_path, procfunct, flags, "connect", socket_connect_unix );
}