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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2012 Red Hat
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 3 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <tevent.h>
#include <talloc.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include "util/util.h"
#include "providers/ldap/sdap.h"
#include "providers/ldap/sdap_id_op.h"
#include "providers/ldap/sdap_sudo.h"
static int sdap_sudo_get_ip_addresses(TALLOC_CTX *mem_ctx, char ***_ip_addr);
struct sdap_sudo_get_hostinfo_state {
char **hostnames;
char **ip_addr;
};
struct tevent_req * sdap_sudo_get_hostinfo_send(TALLOC_CTX *mem_ctx,
struct sdap_options *opts,
struct be_ctx *be_ctx)
{
struct tevent_req *req = NULL;
struct sdap_sudo_get_hostinfo_state *state = NULL;
char *conf_hostnames = NULL;
char *conf_ip_addr = NULL;
int ret;
/* create request */
req = tevent_req_create(mem_ctx, &state, struct sdap_sudo_get_hostinfo_state);
if (req == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, ("tevent_req_create() failed\n"));
return NULL;
}
state->hostnames = NULL;
state->ip_addr = NULL;
/* load info from configuration */
conf_hostnames = dp_opt_get_string(opts->basic, SDAP_SUDO_HOSTNAMES);
conf_ip_addr = dp_opt_get_string(opts->basic, SDAP_SUDO_IP);
if (conf_hostnames != NULL) {
ret = split_on_separator(state, conf_hostnames, ' ', true,
&state->hostnames, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Unable to parse hostnames [%d]: %s\n", ret, strerror(ret)));
goto done;
} else {
DEBUG(SSSDBG_CONF_SETTINGS, ("Hostnames set to: %s\n", conf_hostnames));
}
}
if (conf_ip_addr != NULL) {
ret = split_on_separator(state, conf_ip_addr, ' ', true,
&state->ip_addr, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Unable to parse IP addresses [%d]: %s\n", ret, strerror(ret)));
goto done;
} else {
DEBUG(SSSDBG_CONF_SETTINGS, ("IP addresses set to: %s\n", conf_ip_addr));
}
}
/* if IP addresses are not specified, configure it automatically */
if (state->ip_addr == NULL) {
ret = sdap_sudo_get_ip_addresses(state, &state->ip_addr);
if (ret != EOK) {
}
}
done:
if (ret != EAGAIN) {
if (ret == EOK) {
tevent_req_done(req);
} else {
tevent_req_error(req, ret);
}
tevent_req_post(req, be_ctx->ev);
}
return req;
}
int sdap_sudo_get_hostinfo_recv(TALLOC_CTX *mem_ctx,
struct tevent_req *req,
char ***hostnames, char ***ip_addr)
{
struct sdap_sudo_get_hostinfo_state *state = NULL;
state = tevent_req_data(req, struct sdap_sudo_get_hostinfo_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*hostnames = talloc_steal(mem_ctx, state->hostnames);
*ip_addr = talloc_steal(mem_ctx, state->ip_addr);
return EOK;
}
static int sdap_sudo_get_ip_addresses(TALLOC_CTX *mem_ctx, char ***_ip_addr_list)
{
TALLOC_CTX *tmp_ctx = NULL;
char **ip_addr_list = NULL;
struct ifaddrs *ifaces = NULL;
struct ifaddrs *iface = NULL;
struct sockaddr_in *ip4_addr = NULL;
struct sockaddr_in *ip4_network = NULL;
struct sockaddr_in6 *ip6_addr = NULL;
struct sockaddr_in6 *ip6_network = NULL;
char ip_addr[INET6_ADDRSTRLEN + 1];
char network_addr[INET6_ADDRSTRLEN + 1];
in_addr_t ip4_netmask = 0;
uint32_t ip6_netmask = 0;
unsigned int netmask = 0;
void *sinx_addr = NULL;
void *sinx_network = NULL;
int addr_count = 0;
int ret;
int i;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_new() failed\n"));
return ENOMEM;
}
errno = 0;
ret = getifaddrs(&ifaces);
if (ret == -1) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE, ("Could not read interfaces [%d][%s]\n",
ret, strerror(ret)));
goto done;
}
for (iface = ifaces; iface != NULL; iface = iface->ifa_next) {
/* Some interfaces don't have an ifa_addr */
if (!iface->ifa_addr) continue;
netmask = 0;
switch (iface->ifa_addr->sa_family) {
case AF_INET:
ip4_addr = (struct sockaddr_in*)(iface->ifa_addr);
ip4_network = (struct sockaddr_in*)(iface->ifa_netmask);
/* ignore loopback */
if (inet_netof(ip4_addr->sin_addr) == IN_LOOPBACKNET) {
continue;
}
/* ignore multicast */
if (IN_MULTICAST(ip4_addr->sin_addr.s_addr)) {
continue;
}
/* ignore broadcast */
if (ntohl(ip4_addr->sin_addr.s_addr) == INADDR_BROADCAST) {
continue;
}
/* get network mask length */
ip4_netmask = ntohl(ip4_network->sin_addr.s_addr);
while (ip4_netmask) {
netmask++;
ip4_netmask <<= 1;
}
/* get network address */
ip4_network->sin_addr.s_addr = ip4_addr->sin_addr.s_addr
& ip4_network->sin_addr.s_addr;
sinx_addr = &ip4_addr->sin_addr;
sinx_network = &ip4_network->sin_addr;
break;
case AF_INET6:
ip6_addr = (struct sockaddr_in6*)(iface->ifa_addr);
ip6_network = (struct sockaddr_in6*)(iface->ifa_netmask);
/* ignore loopback */
if (IN6_IS_ADDR_LOOPBACK(&ip6_addr->sin6_addr)) {
continue;
}
/* ignore multicast */
if (IN6_IS_ADDR_MULTICAST(&ip6_addr->sin6_addr)) {
continue;
}
/* get network mask length */
for (i = 0; i < 4; i++) {
ip6_netmask = ntohl(((uint32_t*)(&ip6_network->sin6_addr))[i]);
while (ip6_netmask) {
netmask++;
ip6_netmask <<= 1;
}
}
/* get network address */
for (i = 0; i < 4; i++) {
((uint32_t*)(&ip6_network->sin6_addr))[i] =
((uint32_t*)(&ip6_addr->sin6_addr))[i]
& ((uint32_t*)(&ip6_network->sin6_addr))[i];
}
sinx_addr = &ip6_addr->sin6_addr;
sinx_network = &ip6_network->sin6_addr;
break;
default:
/* skip other families */
continue;
}
/* ip address */
errno = 0;
if (inet_ntop(iface->ifa_addr->sa_family, sinx_addr,
ip_addr, INET6_ADDRSTRLEN) == NULL) {
ret = errno;
DEBUG(SSSDBG_MINOR_FAILURE, ("inet_ntop() failed [%d]: %s\n",
ret, strerror(ret)));
goto done;
}
/* network */
errno = 0;
if (inet_ntop(iface->ifa_addr->sa_family, sinx_network,
network_addr, INET6_ADDRSTRLEN) == NULL) {
ret = errno;
DEBUG(SSSDBG_MINOR_FAILURE, ("inet_ntop() failed [%d]: %s\n",
ret, strerror(ret)));
goto done;
}
addr_count += 2;
ip_addr_list = talloc_realloc(tmp_ctx, ip_addr_list, char*,
addr_count + 1);
if (ip_addr_list == NULL) {
ret = ENOMEM;
goto done;
}
ip_addr_list[addr_count - 2] = talloc_strdup(ip_addr_list, ip_addr);
if (ip_addr_list[addr_count - 2] == NULL) {
ret = ENOMEM;
goto done;
}
ip_addr_list[addr_count - 1] = talloc_asprintf(ip_addr_list, "%s/%d",
network_addr, netmask);
if (ip_addr_list[addr_count - 1] == NULL) {
ret = ENOMEM;
goto done;
}
DEBUG(SSSDBG_TRACE_INTERNAL,
("Found IP address: %s in network %s/%d\n",
ip_addr, network_addr, netmask));
}
ip_addr_list[addr_count] = NULL;
*_ip_addr_list = talloc_steal(mem_ctx, ip_addr_list);
done:
freeifaddrs(ifaces);
talloc_free(tmp_ctx);
return ret;
}
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