refactor protocol reading and writing macros to the common directory, use more logical names and in the PAM module no longer use NSS status codes (import of r887 from nss-pam-ldapd)

git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-ldapd@904 ef36b2f9-881f-0410-afb5-c4e39611909c

1 files changed, 89 insertions, 0 deletions

diff --git a/common/nslcd-prot.c b/common/nslcd-prot.c
new file mode 100644
index 0000000..102a6df
--- /dev/null
+++ b/common/nslcd-prot.c
@@ -0,0 +1,89 @@
+/*
+   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(struct sockaddr_un))<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;
+}