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/*
ether.c - ethernet address entry lookup routines
Parts of this file were part of the nss_ldap library (as ldap-ethers.c)
which has been forked into the nss-pam-ldapd library.
Copyright (C) 1997-2005 Luke Howard
Copyright (C) 2006 West Consulting
Copyright (C) 2006-2017 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
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif /* HAVE_STDINT_H */
#include "common.h"
#include "log.h"
#include "myldap.h"
#include "cfg.h"
#include "attmap.h"
#include "compat/ether.h"
/* ( nisSchema.2.11 NAME 'ieee802Device' SUP top AUXILIARY
* DESC 'A device with a MAC address; device SHOULD be
* used as a structural class'
* MAY macAddress )
*/
/* the search base for searches */
const char *ether_bases[NSS_LDAP_CONFIG_MAX_BASES] = { NULL };
/* the search scope for searches */
int ether_scope = LDAP_SCOPE_DEFAULT;
/* the basic search filter for searches */
const char *ether_filter = "(objectClass=ieee802Device)";
/* the attributes to request with searches */
const char *attmap_ether_cn = "cn";
const char *attmap_ether_macAddress = "macAddress";
/* the attribute list to request with searches */
static const char *ether_attrs[3];
/* create a search filter for searching an ethernet address
by name, return -1 on errors */
static int mkfilter_ether_byname(const char *name,
char *buffer, size_t buflen)
{
char safename[BUFLEN_HOSTNAME];
/* escape attribute */
if (myldap_escape(name, safename, sizeof(safename)))
{
log_log(LOG_ERR, "mkfilter_ether_byname(): safename buffer too small");
return -1;
}
/* build filter */
return mysnprintf(buffer, buflen, "(&%s(%s=%s))",
ether_filter, attmap_ether_cn, safename);
}
static void my_ether_ntoa(const uint8_t *addr, char *buffer, int compact)
{
int i;
for (i = 0; i < 6; i++)
{
if (i > 0)
*buffer++ = ':';
buffer += sprintf(buffer, compact ? "%x" : "%02x", addr[i]);
}
*buffer++ = '\0';
}
static int mkfilter_ether_byether(const struct ether_addr *addr,
char *buffer, size_t buflen)
{
char addrstr1[20], addrstr2[20];
my_ether_ntoa((const uint8_t *)addr, addrstr1, 1);
my_ether_ntoa((const uint8_t *)addr, addrstr2, 0);
/* there should be no characters that need escaping */
return mysnprintf(buffer, buflen, "(&%s(|(%s=%s)(%s=%s)))", ether_filter,
attmap_ether_macAddress, addrstr1,
attmap_ether_macAddress, addrstr2);
}
void ether_init(void)
{
int i;
/* set up search bases */
if (ether_bases[0] == NULL)
for (i = 0; i < NSS_LDAP_CONFIG_MAX_BASES; i++)
ether_bases[i] = nslcd_cfg->bases[i];
/* set up scope */
if (ether_scope == LDAP_SCOPE_DEFAULT)
ether_scope = nslcd_cfg->scope;
/* set up attribute list */
ether_attrs[0] = attmap_ether_cn;
ether_attrs[1] = attmap_ether_macAddress;
ether_attrs[2] = NULL;
}
/* TODO: check for errors in aton() */
#define WRITE_ETHER(fp, addr) \
ether_aton_r(addr, &tmpaddr); \
WRITE(fp, &tmpaddr, sizeof(uint8_t[6]));
static int write_ether(TFILE *fp, MYLDAP_ENTRY *entry,
const char *reqname, const char *reqether)
{
int32_t tmpint32;
struct ether_addr tmpaddr;
const char *tmparr[2];
const char **names, **ethers;
int i, j;
/* get the name of the ether entry */
names = myldap_get_values(entry, attmap_ether_cn);
if ((names == NULL) || (names[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_ether_cn);
return 0;
}
/* get the addresses */
if (reqether != NULL)
{
ethers = tmparr;
ethers[0] = reqether;
ethers[1] = NULL;
}
else
{
ethers = myldap_get_values(entry, attmap_ether_macAddress);
if ((ethers == NULL) || (ethers[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_ether_macAddress);
return 0;
}
/* TODO: move parsing of addresses up here */
}
/* write entries for all names and addresses */
for (i = 0; names[i] != NULL; i++)
if ((reqname == NULL) || (strcasecmp(reqname, names[i]) == 0))
for (j = 0; ethers[j] != NULL; j++)
{
WRITE_INT32(fp, NSLCD_RESULT_BEGIN);
WRITE_STRING(fp, names[i]);
WRITE_ETHER(fp, ethers[j]);
}
return 0;
}
NSLCD_HANDLE(
ether, byname, NSLCD_ACTION_ETHER_BYNAME,
char name[BUFLEN_HOSTNAME];
char filter[BUFLEN_FILTER];
READ_STRING(fp, name);
log_setrequest("ether=\"%s\"", name);,
mkfilter_ether_byname(name, filter, sizeof(filter)),
write_ether(fp, entry, name, NULL)
)
NSLCD_HANDLE(
ether, byether, NSLCD_ACTION_ETHER_BYETHER,
struct ether_addr addr;
char addrstr[20];
char filter[BUFLEN_FILTER];
READ(fp, &addr, sizeof(uint8_t[6]));
my_ether_ntoa((uint8_t *)&addr, addrstr, 1);
log_setrequest("ether=%s", addrstr);,
mkfilter_ether_byether(&addr, filter, sizeof(filter)),
write_ether(fp, entry, NULL, addrstr)
)
NSLCD_HANDLE(
ether, all, NSLCD_ACTION_ETHER_ALL,
const char *filter;
log_setrequest("ether(all)");,
(filter = ether_filter, 0),
write_ether(fp, entry, NULL, NULL)
)
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