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/*
common.h - common server code routines
This file is part of the nss-pam-ldapd library.
Copyright (C) 2006 West Consulting
Copyright (C) 2006-2014 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#ifndef NSLCD__COMMON_H
#define NSLCD__COMMON_H 1
#include <errno.h>
#include <limits.h>
#include <string.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif /* HAVE_STDINT_H */
#include <sys/types.h>
#include "nslcd.h"
#include "common/nslcd-prot.h"
#include "common/tio.h"
#include "compat/attrs.h"
#include "cfg.h"
#include "hackers_watch.h"
#define NSS_MODULE_SONAME NSS_LDAP_SONAME
#define NSS_MODULE_NAME "ldap"
#define NSS_MODULE_ID_VERSION "_nss_ldap_version"
#define NSS_MODULE_ID_ENABLELOOKUPS "_nss_ldap_enablelookups"
/* macros for basic read and write operations, the following
ERROR_OUT* marcos define the action taken on errors
the stream is not closed because the caller closes the
stream */
#define ERROR_OUT_WRITEERROR(fp) \
do { \
if (errno == EPIPE) \
log_log(LOG_DEBUG, "error writing to client: %s", strerror(errno)); \
else \
log_log(LOG_WARNING, "error writing to client: %s", strerror(errno)); \
return -1; \
} while(0)
#define ERROR_OUT_READERROR(fp) \
do { \
log_log(LOG_WARNING, "error reading from client: %s", strerror(errno)); \
return -1; \
} while(0)
#define ERROR_OUT_BUFERROR(fp) \
do { \
log_log(LOG_ERR, "client supplied argument %d bytes too large", \
tmpint32); \
return -1; \
} while(0)
/* a simple wrapper around snprintf,
returns 0 if ok, -1 on error */
int mysnprintf(char *buffer, size_t buflen, const char *format, ...)
LIKE_PRINTF(3, 4);
/* get a name of a signal with a given signal number */
const char *signame(int signum);
/* checks to see if the specified string is a valid user or group name */
MUST_USE int isvalidname(const char *name);
/* check whether the nsswitch file should be reloaded */
void nsswitch_check_reload(void);
/* check whether the nsswitch.conf file has NSLCD as a naming source for db */
int nsswitch_shadow_uses_nslcd(void);
/* start a child process that holds onto the original privileges with the
purpose of running external cache invalidation commands */
int invalidator_start(void);
/* signal invalidator to invalidate the selected external cache */
void invalidator_do(enum nss_map_selector map);
/* common buffer lengths */
#define BUFLEN_NAME 256 /* user, group names and such */
#define BUFLEN_PASSWORD 128 /* passwords */
#define BUFLEN_MESSAGE 1024 /* message strings */
/* these are the different functions that handle the database
specific actions, see nslcd.h for the action descriptions */
#include "dispatch.h"
/* macros for generating service handling code */
#define NSLCD_HANDLE(db, fn, fndecls, fnread, fncheck, tentry, fnsearch, fnwrite, fnclean) \
int nslcd_##db##_##fn(TFILE *fp, struct session *session) \
NSLCD_HANDLE_BODY(db, fn, fndecls, fnread, fncheck, tentry, fnsearch, fnwrite, fnclean)
#define NSLCD_HANDLE_UID(db, fn, fndecls, fnread, fncheck, tentry, fnsearch, fnwrite, fnclean) \
int nslcd_##db##_##fn(TFILE *fp, struct session *session, uid_t calleruid) \
NSLCD_HANDLE_BODY(db, fn, fndecls, fnread, fncheck, tentry, fnsearch, fnwrite, fnclean)
#define NSLCD_HANDLE_BODY(db, fn, fndecls, fnread, fncheck, tentry, fnsearch, fnwrite, fnclean) \
{ \
/* define common variables */ \
tentry *entry = NULL; \
int rc = 1; \
fndecls \
tentry *search(int *rcp) { fnsearch } \
int write(TFILE *fp, tentry *entry) { fnwrite } \
void clean() { fnclean } \
/* read request parameters */ \
fnread \
/* validate request parameters */ \
fncheck \
/* write the response header */ \
WRITE_INT32(fp, NSLCD_VERSION); \
WRITE_INT32(fp, NSLCD_ACTION_##db##_##fn); \
/* go over results */ \
while ((entry = search(&rc)) != NULL) \
{ \
if ( write(fp, entry) ) { \
clean(); \
return -1; \
} \
} \
/* write the final result code */ \
if (rc == 0) \
{ \
WRITE_INT32(fp, NSLCD_RESULT_END); \
} \
clean(); \
return 0; \
}
/* macro to compare strings which uses the ignorecase config option to
determine whether or not to do a case-sensitive match */
#define STR_CMP(str1, str2) \
(nslcd_cfg->ignorecase == 1 ? \
strcasecmp(str1, str2) : strcmp(str1, str2))
#endif /* not NSLCD__COMMON_H */
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