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/* acct_r.c - Read accounting reply from server.
*
* Copyright (C) 2010, Pawel Krawczyk <kravietz@ceti.pl> and
* Jeroen Nijhof <jeroen@nijhofnet.nl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program - see the file COPYING.
*
* See `CHANGES' file for revision history.
*/
#include "tacplus.h"
#include "libtac.h"
#include "messages.h"
char *tac_account_read(int fd) {
HDR th;
struct acct_reply *tb;
int len_from_header, r, len_from_body;
char *msg = NULL;
r=read(fd, &th, TAC_PLUS_HDR_SIZE);
if(r < TAC_PLUS_HDR_SIZE) {
syslog(LOG_ERR,
"%s: short acct header, %d of %d: %m", __FUNCTION__,
r, TAC_PLUS_HDR_SIZE);
return(system_err_msg);
}
/* check the reply fields in header */
msg = _tac_check_header(&th, TAC_PLUS_ACCT);
if(msg != NULL)
return(msg);
len_from_header=ntohl(th.datalength);
tb=(struct acct_reply *) xcalloc(1, len_from_header);
/* read reply packet body */
r=read(fd, tb, len_from_header);
if(r < len_from_header) {
syslog(LOG_ERR,
"%s: incomplete message body, %d bytes, expected %d: %m",
__FUNCTION__,
r, len_from_header);
return(system_err_msg);
}
/* decrypt the body */
_tac_crypt((u_char *) tb, &th, len_from_header);
/* Convert network byte order to host byte order */
tb->msg_len = ntohs(tb->msg_len);
tb->data_len = ntohs(tb->data_len);
/* check the length fields */
len_from_body=sizeof(tb->msg_len) + sizeof(tb->data_len) +
sizeof(tb->status) + tb->msg_len + tb->data_len;
if(len_from_header != len_from_body) {
syslog(LOG_ERR,
"%s: invalid reply content, incorrect key?",
__FUNCTION__);
return(system_err_msg);
}
/* save status and clean up */
r=tb->status;
if(tb->msg_len) {
msg=(char *) xcalloc(1, tb->msg_len);
bcopy((u_char *) tb+TAC_ACCT_REPLY_FIXED_FIELDS_SIZE, msg, tb->msg_len);
} else
msg="Accounting failed";
free(tb);
/* server logged our request successfully */
if(r == TAC_PLUS_ACCT_STATUS_SUCCESS) {
TACDEBUG((LOG_DEBUG, "%s: accounted ok", __FUNCTION__))
msg=NULL;
return(NULL);
}
/* return pointer to server message */
syslog(LOG_DEBUG, "%s: accounting failed, server reply was %d (%s)",
__FUNCTION__, r, msg);
return(msg);
}
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