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/*
* Copyright (C) 2005-2006 by CERN/IT/GD/SC
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: Cns_readdirxr.c,v $ $Revision: 1.2 $ $Date: 2006/08/01 12:41:12 $ CERN IT-GD/SC Jean-Philippe Baud";
#endif /* not lint */
/* Cns_readdirxr - read a directory entry including replica information */
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#if defined(_WIN32)
#include <winsock2.h>
#else
#include <unistd.h>
#include <netinet/in.h>
#endif
#include "marshall.h"
#include "Cns_api.h"
#include "Cns.h"
#include "serrno.h"
struct Cns_direnrep DLL_DECL *
Cns_readdirxr(Cns_DIR *dirp, char *se)
{
int c;
int direntsz;
struct Cns_direnrep *dp;
char func[16];
int getattr = 5;
gid_t gid;
int i;
struct Cns_rep_info *ir;
int msglen;
int n;
int nbentries;
char *q;
char *rbp;
struct Cns_rep_info *rep_entries;
char repbuf[DIRBUFSZ+4];
char *sbp;
char sendbuf[REQBUFSZ];
uid_t uid;
strcpy (func, "Cns_readdirxr");
uid = geteuid();
gid = getegid();
#if defined(_WIN32)
if (uid < 0 || gid < 0) {
Cns_errmsg (func, NS053);
serrno = SENOMAPFND;
return (NULL);
}
#endif
if (! dirp) {
serrno = EFAULT;
return (NULL);
}
if (se && strlen (se) > CA_MAXHOSTNAMELEN) {
serrno = EINVAL;
return (NULL);
}
/* compute size of client machine Cns_direnrep structure excluding d_name */
dp = (struct Cns_direnrep *) dirp->dd_buf;
direntsz = &dp->d_name[0] - (char *) dp;
if (dirp->dd_size == 0) { /* no data in the cache */
if (dirp->replicas) { /* free previous replica information */
ir = (struct Cns_rep_info *) dirp->replicas;
for (i = 0; i < dirp->nbreplicas; i++) {
free (ir->host);
free (ir->sfn);
ir++;
}
free (dirp->replicas);
dirp->nbreplicas = 0;
dirp->replicas = NULL;
}
if (dirp->eod)
return (NULL);
/* Build request header */
sbp = sendbuf;
marshall_LONG (sbp, CNS_MAGIC);
marshall_LONG (sbp, CNS_READDIR);
q = sbp; /* save pointer. The next field will be updated */
msglen = 3 * LONGSIZE;
marshall_LONG (sbp, msglen);
/* Build request body */
marshall_LONG (sbp, uid);
marshall_LONG (sbp, gid);
marshall_WORD (sbp, getattr);
marshall_WORD (sbp, direntsz);
marshall_HYPER (sbp, dirp->fileid);
marshall_WORD (sbp, dirp->bod);
if (se) {
marshall_STRING (sbp, se);
} else {
marshall_STRING (sbp, "");
}
msglen = sbp - sendbuf;
marshall_LONG (q, msglen); /* update length field */
c = send2nsdx (&dirp->dd_fd, NULL, sendbuf, msglen,
repbuf, sizeof(repbuf), (void **) &dirp->replicas,
&dirp->nbreplicas);
if (c < 0)
return (NULL);
rbp = repbuf;
unmarshall_WORD (rbp, nbentries);
if (nbentries == 0)
return (NULL); /* end of directory */
/* unmarshall reply into the Cns_direnrep structures */
dp = (struct Cns_direnrep *) dirp->dd_buf;
i = 0;
rep_entries = (struct Cns_rep_info *) dirp->replicas;
while (nbentries--) {
unmarshall_HYPER (rbp, dp->fileid);
unmarshall_STRING (rbp, dp->guid);
unmarshall_WORD (rbp, dp->filemode);
unmarshall_HYPER (rbp, dp->filesize);
dp->nbreplicas = 0;
dp->rep = NULL;
for ( ; i < dirp->nbreplicas; i++) {
if (dp->fileid != (rep_entries+i)->fileid) break;
dp->nbreplicas++;
if (dp->nbreplicas == 1)
dp->rep = rep_entries + i;
}
unmarshall_STRING (rbp, dp->d_name);
dp->d_reclen = ((direntsz + strlen (dp->d_name) + 8) / 8) * 8;
dp = (struct Cns_direnrep *) ((char *) dp + dp->d_reclen);
}
dirp->bod = 0;
unmarshall_WORD (rbp, dirp->eod);
dirp->dd_size = (char *) dp - dirp->dd_buf;
}
dp = (struct Cns_direnrep *) (dirp->dd_buf + dirp->dd_loc);
dirp->dd_loc += dp->d_reclen;
if (dirp->dd_loc >= dirp->dd_size) { /* must refill next time */
dirp->dd_loc = 0;
dirp->dd_size = 0;
}
return (dp);
}
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