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/*
nslcd-server.c - server socket routines
Copyright (C) 2006 West Consulting
Copyright (C) 2006 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <malloc.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <fcntl.h>
#include "nslcd-server.h"
#include "log.h"
/* returns a socket ready to answer requests from the client,
return <0 on error */
int nslcd_server_open(void)
{
int sock;
/*int flag;*/
struct sockaddr_un addr;
/* create a socket */
if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 )
{
log_log(LOG_ERR,"cannot create socket: %s",strerror(errno));
exit(1);
}
/* create socket address structure */
memset(&addr,0,sizeof(struct sockaddr_un));
addr.sun_family=AF_UNIX;
strcpy(addr.sun_path,NSLCD_SOCKET);
/* unlink to socket */
if (unlink(NSLCD_SOCKET)<0)
{
log_log(LOG_DEBUG,"unlink() of "NSLCD_SOCKET" failed (ignored): %s",
strerror(errno));
}
/* bind to the socket */
if (bind(sock,(struct sockaddr *)&addr,sizeof(struct sockaddr_un))<0)
{
log_log(LOG_ERR,"bind() to "NSLCD_SOCKET" failed: %s",
strerror(errno));
if (close(sock))
log_log(LOG_WARNING,"problem closing socket: %s",strerror(errno));
exit(1);
}
#ifdef NONBLOCKING
/* we are going to block for now and implement threading later on */
/* do not block on accept() */
if ((flag=fcntl(sock,F_GETFL,0))<0)
{
log_log(LOG_ERR,"fctnl(F_GETFL) failed: %s",strerror(errno));
if (close(sock))
log_log(LOG_WARNING,"problem closing socket: %s",strerror(errno));
exit(1);
}
if (fcntl(sock,F_SETFL,flag|O_NONBLOCK)<0)
{
log_log(LOG_ERR,"fctnl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno));
if (close(sock))
log_log(LOG_WARNING,"problem closing socket: %s",strerror(errno));
exit(1);
}
#endif /* NONBLOCKING */
/* close the file descriptor on exit */
if (fcntl(sock,F_SETFD,FD_CLOEXEC)<0)
{
log_log(LOG_ERR,"fctnl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno));
if (close(sock))
log_log(LOG_WARNING,"problem closing socket: %s",strerror(errno));
exit(1);
}
#ifdef DONT_FOR_NOW
/* Set permissions for the socket. */
chmod (_PATH_NSCDSOCKET, DEFFILEMODE);
#endif /* DONT_FOR_NOW */
/* start listening for connections */
if (listen(sock,SOMAXCONN)<0)
{
log_log(LOG_ERR,"listen() failed: %s",strerror(errno));
if (close(sock))
log_log(LOG_WARNING,"problem closing socket: %s",strerror(errno));
exit(1);
}
/* we're done */
return sock;
}
/* redifine the ERROR_OUT mechanism */
#undef ERROR_OUT_READERROR
#define ERROR_OUT_READERROR(fp) \
fclose(fp); \
log_log(LOG_DEBUG,"error reading from stream: %s",strerror(errno)); \
return;
/* read a request message, returns <0 in case of errors,
this function closes the socket */
void nslcd_server_handlerequest(int sock)
{
int32_t tmpint32;
FILE *fp;
/* create a stream object */
if ((fp=fdopen(sock,"w+"))==NULL)
{
close(sock);
return;
}
/* read the protocol version */
READ_TYPE(fp,tmpint32,int32_t);
if (tmpint32 != NSLCD_VERSION)
{
fclose(fp);
log_log(LOG_DEBUG,"wrong nslcd version id (%d)",(int)tmpint32);
return;
}
/* read the request type */
READ_TYPE(fp,tmpint32,int32_t);
/* handle request */
switch (tmpint32)
{
case NSLCD_ACTION_ALIAS_BYNAME: nslcd_alias_byname(fp); break;
case NSLCD_ACTION_ALIAS_ALL: nslcd_alias_all(fp); break;
case NSLCD_ACTION_ETHER_BYNAME: nslcd_ether_byname(fp); break;
case NSLCD_ACTION_ETHER_BYETHER: nslcd_ether_byether(fp); break;
case NSLCD_ACTION_ETHER_ALL: nslcd_ether_all(fp); break;
case NSLCD_ACTION_GROUP_BYNAME: nslcd_group_byname(fp); break;
case NSLCD_ACTION_GROUP_BYGID: nslcd_group_bygid(fp); break;
case NSLCD_ACTION_GROUP_BYMEMBER: nslcd_group_bymember(fp); break;
case NSLCD_ACTION_GROUP_ALL: nslcd_group_all(fp); break;
case NSLCD_ACTION_HOST_BYNAME: nslcd_host_byname(fp); break;
case NSLCD_ACTION_HOST_BYADDR: nslcd_host_byaddr(fp); break;
case NSLCD_ACTION_HOST_ALL: nslcd_host_all(fp); break;
case NSLCD_ACTION_NETGROUP_BYNAME: nslcd_netgroup_byname(fp); break;
/*
case NSLCD_ACTION_NETWORK_BYNAME: nslcd_network_byname(fp); break;
case NSLCD_ACTION_NETWORK_BYADDR: nslcd_network_byaddr(fp); break;
case NSLCD_ACTION_NETWORK_ALL: nslcd_network_all(fp); break;
*/
case NSLCD_ACTION_PASSWD_BYNAME: nslcd_passwd_byname(fp); break;
case NSLCD_ACTION_PASSWD_BYUID: nslcd_passwd_byuid(fp); break;
case NSLCD_ACTION_PASSWD_ALL: nslcd_passwd_all(fp); break;
case NSLCD_ACTION_PROTOCOL_BYNAME: nslcd_protocol_byname(fp); break;
case NSLCD_ACTION_PROTOCOL_BYNUMBER:nslcd_protocol_bynumber(fp); break;
case NSLCD_ACTION_PROTOCOL_ALL: nslcd_protocol_all(fp); break;
case NSLCD_ACTION_RPC_BYNAME: nslcd_rpc_byname(fp); break;
case NSLCD_ACTION_RPC_BYNUMBER: nslcd_rpc_bynumber(fp); break;
case NSLCD_ACTION_RPC_ALL: nslcd_rpc_all(fp); break;
case NSLCD_ACTION_SERVICE_BYNAME: nslcd_service_byname(fp); break;
case NSLCD_ACTION_SERVICE_BYNUMBER: nslcd_service_bynumber(fp); break;
case NSLCD_ACTION_SERVICE_ALL: nslcd_service_all(fp); break;
case NSLCD_ACTION_SHADOW_BYNAME: nslcd_shadow_byname(fp); break;
case NSLCD_ACTION_SHADOW_ALL: nslcd_shadow_all(fp); break;
default:
log_log(LOG_WARNING,"invalid request id: %d",(int)tmpint32);
break;
}
/* we're done with the request */
fclose(fp);
return;
}
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