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/*
nslcd-prot.c - common functions for NSLCD lookups
Copyright (C) 2006 West Consulting
Copyright (C) 2006, 2007, 2008 Arthur de Jong
This library 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 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif /* HAVE_STDINT_H */
#include <unistd.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include "nslcd.h"
#include "nslcd-prot.h"
/* buffer sizes for I/O */
#define READBUFFER_MINSIZE 1024
#define READBUFFER_MAXSIZE 2*1024*1024
#define WRITEBUFFER_MINSIZE 32
#define WRITEBUFFER_MAXSIZE 32
/* Note that the READBUFFER_MAXSIZE should be large enough to hold any single
result entity as defined in nslcd.h because the get*ent() functions expect
to be able to tio_reset() the stream to re-read the current entity.
Since group entities can grow arbitrarily large, this setting limits the
number of users that can be put in a group. */
/* returns a socket to the server or NULL on error (see errno),
socket should be closed with fclose() */
TFILE *nslcd_client_open()
{
int sock;
struct sockaddr_un addr;
struct timeval readtimeout,writetimeout;
TFILE *fp;
/* create a socket */
if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 )
return NULL;
/* create socket address structure */
memset(&addr,0,sizeof(struct sockaddr_un));
addr.sun_family=AF_UNIX;
strncpy(addr.sun_path,NSLCD_SOCKET,sizeof(addr.sun_path));
addr.sun_path[sizeof(addr.sun_path)-1]='\0';
/* connect to the socket */
if (connect(sock,(struct sockaddr *)&addr,(socklen_t)(sizeof(addr.sun_family)+strlen(addr.sun_path)))<0)
{
(void)close(sock);
return NULL;
}
/* set the timeouts */
readtimeout.tv_sec=60; /* looking up stuff may take some time */
readtimeout.tv_usec=0;
writetimeout.tv_sec=10; /* nslcd could be loaded with requests */
writetimeout.tv_usec=0;
/* create a stream object */
if ((fp=tio_fdopen(sock,&readtimeout,&writetimeout,
READBUFFER_MINSIZE,READBUFFER_MAXSIZE,
WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL)
{
(void)close(sock);
return NULL;
}
/* return the stream */
return fp;
}
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