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/*
networks.c - NSS lookup functions for networks database
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 "config.h"
#include <string.h>
#include <nss.h>
#include <errno.h>
#include "prototypes.h"
#include "common.h"
/* Redifine some ERROR_OUT macros as we also want to set h_errnop. */
#undef ERROR_OUT_BUFERROR
#define ERROR_OUT_BUFERROR(fp) \
fclose(fp); \
fp=NULL; \
*errnop=ERANGE; \
*h_errnop=TRY_AGAIN; \
return NSS_STATUS_TRYAGAIN;
#undef ERROR_OUT_NOSUCCESS
#define ERROR_OUT_NOSUCCESS(fp,retv) \
fclose(fp); \
fp=NULL; \
*errnop=ENOENT; \
*h_errnop=HOST_NOT_FOUND; \
return nslcd2nss(retv);
/* read a single host entry from the stream, ignoring entries
that are not AF_INET (IPv4), result is stored in result */
static enum nss_status read_netent(
FILE *fp,struct netent *result,
char *buffer,size_t buflen,int *errnop,int *h_errnop)
{
int32_t tmpint32,tmp2int32,tmp3int32;
int32_t numaddr,i;
int readaf;
size_t bufptr=0;
enum nss_status retv=NSS_STATUS_NOTFOUND;
/* read the host entry */
READ_STRING_BUF(fp,result->n_name);
READ_STRINGLIST_NULLTERM(fp,result->n_aliases);
result->n_addrtype=AF_INET;
/* read number of addresses to follow */
READ_TYPE(fp,numaddr,int32_t);
/* go through the address list and filter on af */
i=0;
while (--numaddr>=0)
{
/* read address family and size */
READ_INT32(fp,readaf);
READ_INT32(fp,tmp2int32);
if ((readaf==AF_INET)&&(tmp2int32==4))
{
/* read address and translate to host byte order */
READ_TYPE(fp,tmpint32,int32_t);
result->n_net=ntohl(tmpint32);
/* signal that we've read a proper entry */
retv=NSS_STATUS_SUCCESS;
}
else
{
/* skip unsupported address families */
SKIP(fp,tmpint32);
}
}
return retv;
}
enum nss_status _nss_ldap_getnetbyname_r(const char *name,struct netent *result,char *buffer,size_t buflen,int *errnop,int *h_errnop)
{
FILE *fp;
int32_t tmpint32;
enum nss_status retv;
/* set to NO_RECOVERY in case some error is caught */
*h_errnop=NO_RECOVERY;
/* open socket and write request */
OPEN_SOCK(fp);
WRITE_REQUEST(fp,NSLCD_ACTION_NETWORK_BYNAME);
WRITE_STRING(fp,name);
WRITE_FLUSH(fp);
/* read response */
READ_RESPONSEHEADER(fp,NSLCD_ACTION_NETWORK_BYNAME);
READ_RESPONSE_CODE(fp);
retv=read_netent(fp,result,buffer,buflen,errnop,h_errnop);
/* check read result */
if (retv==NSS_STATUS_NOTFOUND)
{
*h_errnop=NO_ADDRESS;
fclose(fp);
return NSS_STATUS_NOTFOUND;
}
else if (retv!=NSS_STATUS_SUCCESS)
return retv;
/* close socket and we're done */
fclose(fp);
return NSS_STATUS_SUCCESS;
}
/* Note: the af parameter is ignored and is assumed to be AF_INET */
enum nss_status _nss_ldap_getnetbyaddr_r(uint32_t addr,int af,struct netent *result,char *buffer,size_t buflen,int *errnop,int *h_errnop)
{
FILE *fp;
int32_t tmpint32;
enum nss_status retv;
/* set to NO_RECOVERY in case some error is caught */
*h_errnop=NO_RECOVERY;
/* open socket and write request */
OPEN_SOCK(fp);
WRITE_REQUEST(fp,NSLCD_ACTION_NETWORK_BYADDR);
/* write the address */
WRITE_INT32(fp,AF_INET);
WRITE_INT32(fp,4);
addr=htonl(addr);
WRITE_INT32(fp,addr);
WRITE_FLUSH(fp);
/* read response */
READ_RESPONSEHEADER(fp,NSLCD_ACTION_NETWORK_BYADDR);
READ_RESPONSE_CODE(fp);
retv=read_netent(fp,result,buffer,buflen,errnop,h_errnop);
/* check read result */
if (retv==NSS_STATUS_NOTFOUND)
{
*h_errnop=NO_ADDRESS;
fclose(fp);
return NSS_STATUS_NOTFOUND;
}
else if (retv!=NSS_STATUS_SUCCESS)
return retv;
/* close socket and we're done */
fclose(fp);
return NSS_STATUS_SUCCESS;
}
/* thread-local file pointer to an ongoing request */
static __thread FILE *netentfp;
enum nss_status _nss_ldap_setnetent(int stayopen)
{
NSS_SETENT(netentfp,NSLCD_ACTION_NETWORK_ALL);
}
enum nss_status _nss_ldap_getnetent_r(struct netent *result,char *buffer,size_t buflen,int *errnop,int *h_errnop)
{
int32_t tmpint32;
enum nss_status retv=NSS_STATUS_NOTFOUND;
/* check that we have a valid file descriptor */
if (netentfp==NULL)
{
*errnop=ENOENT;
return NSS_STATUS_UNAVAIL;
}
/* check until we read an non-empty entry */
do
{
/* read a response */
READ_RESPONSE_CODE(netentfp);
retv=read_netent(netentfp,result,buffer,buflen,errnop,h_errnop);
/* do another loop run if we read an empty address list */
}
while (retv==NSS_STATUS_NOTFOUND);
return retv;
}
enum nss_status _nss_ldap_endnetent(void)
{
NSS_ENDENT(netentfp);
}
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