Arthur de Jong

+/*

+ 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 "nslcd-client.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 */

+ READ_INT32(fp,result->n_net);

+ /* signal that we've read a proper entry */

+ retv=NSS_STATUS_SUCCESS;

+ }

+ else

+ {

+ 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);

+ 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 *hostentfp;

+#define fp hostentfp

+

+enum nss_status _nss_ldap_setnetent(int stayopen)

+{

+ NSS_SETENT(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 (fp==NULL)

+ {

+ *errnop=ENOENT;

+ return NSS_STATUS_UNAVAIL;

+ }

+ /* check until we read an non-empty entry */

+ do

+ {

+ /* read a response */

+ READ_RESPONSE_CODE(fp);

+ retv=read_netent(fp,result,buffer,buflen,errnop,h_errnop);

+ /* do another loop run if we read an empty address list */

+ }

+ while ((retv==NSS_STATUS_SUCCESS)||(retv==NSS_STATUS_NOTFOUND));

+ return retv;

+}

+

+enum nss_status _nss_ldap_endnetent(void)

+{

+ NSS_ENDENT();

+}