/* nslcd-prot.c - common functions for NSLCD lookups Copyright (C) 2006 West Consulting Copyright (C) 2006, 2007, 2008, 2009, 2010, 2012 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 #endif /* HAVE_STDINT_H */ #include #include #include #include #include #include #include #include #include #include "nslcd.h" #include "nslcd-prot.h" #include "compat/socket.h" /* read timeout is 60 seconds because looking up stuff may take some time write timeout is 10 secods because nslcd could be loaded with requests */ #define READ_TIMEOUT 60*1000 #define WRITE_TIMEOUT 10*1000 /* 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; TFILE *fp; int flags; /* 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'; /* close the file descriptor on exec (ignore errors) */ flags=fcntl(sock,F_GETFL); if (flags>=0) (void)fcntl(sock,F_SETFD,flags|FD_CLOEXEC); /* connect to the socket */ if (connect(sock,(struct sockaddr *)&addr,SUN_LEN(&addr))<0) { (void)close(sock); return NULL; } /* create a stream object */ if ((fp=tio_fdopen(sock,READ_TIMEOUT,WRITE_TIMEOUT, READBUFFER_MINSIZE,READBUFFER_MAXSIZE, WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL) { (void)close(sock); return NULL; } /* return the stream */ return fp; }