nsssrv.c revision a56cdc811fec8d2c0e69fce3970a1032d1e3d2a8
/*
SSSD
NSS Responder
Copyright (C) Simo Sorce <ssorce@redhat.com> 2008
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 <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <string.h>
#include <sys/time.h>
#include <errno.h>
#include "popt.h"
#include "util/util.h"
#include "responder/nss/nsssrv.h"
#include "responder/common/negcache.h"
#include "db/sysdb.h"
#include "confdb/confdb.h"
#include "dbus/dbus.h"
#include "sbus/sssd_dbus.h"
#include "responder/common/responder_packet.h"
#include "providers/data_provider.h"
#include "monitor/monitor_interfaces.h"
#include "sbus/sbus_client.h"
#define SSS_NSS_PIPE_NAME "nss"
#define DEFAULT_PWFIELD "*"
struct sbus_method monitor_nss_methods[] = {
{ MON_CLI_METHOD_PING, monitor_common_pong },
{ MON_CLI_METHOD_RES_INIT, monitor_common_res_init },
{ MON_CLI_METHOD_ROTATE, monitor_common_rotate_logs },
{ NULL, NULL }
};
struct sbus_interface monitor_nss_interface = {
MONITOR_INTERFACE,
MONITOR_PATH,
SBUS_DEFAULT_VTABLE,
monitor_nss_methods,
NULL
};
static int nss_get_config(struct nss_ctx *nctx,
struct resp_ctx *rctx,
struct confdb_ctx *cdb)
{
TALLOC_CTX *tmpctx;
int ret;
tmpctx = talloc_new(nctx);
if (!tmpctx) return ENOMEM;
ret = confdb_get_int(cdb, nctx, CONFDB_NSS_CONF_ENTRY,
CONFDB_NSS_ENUM_CACHE_TIMEOUT, 120,
&nctx->enum_cache_timeout);
if (ret != EOK) goto done;
ret = confdb_get_int(cdb, nctx, CONFDB_NSS_CONF_ENTRY,
CONFDB_NSS_ENTRY_NEG_TIMEOUT, 15,
&nctx->neg_timeout);
if (ret != EOK) goto done;
ret = confdb_get_bool(cdb, nctx, CONFDB_NSS_CONF_ENTRY,
CONFDB_NSS_FILTER_USERS_IN_GROUPS, true,
&nctx->filter_users_in_groups);
if (ret != EOK) goto done;
ret = confdb_get_int(cdb, nctx, CONFDB_NSS_CONF_ENTRY,
CONFDB_NSS_ENTRY_CACHE_NOWAIT_PERCENTAGE, 0,
&nctx->cache_refresh_percent);
if (ret != EOK) goto done;
if (nctx->cache_refresh_percent < 0 ||
nctx->cache_refresh_percent > 99) {
DEBUG(0,("Configuration error: entry_cache_nowait_percentage is"
"invalid. Disabling feature.\n"));
nctx->cache_refresh_percent = 0;
}
ret = sss_ncache_prepopulate(nctx->ncache, cdb, nctx->rctx->names,
nctx->rctx->domains);
if (ret != EOK) {
goto done;
}
ret = confdb_get_string(cdb, nctx, CONFDB_NSS_CONF_ENTRY,
CONFDB_NSS_PWFIELD, DEFAULT_PWFIELD,
&nctx->pwfield);
if (ret != EOK) goto done;
ret = 0;
done:
talloc_free(tmpctx);
return ret;
}
static struct sbus_method nss_dp_methods[] = {
{ NULL, NULL }
};
struct sbus_interface nss_dp_interface = {
DP_INTERFACE,
DP_PATH,
SBUS_DEFAULT_VTABLE,
nss_dp_methods,
NULL
};
static void nss_dp_reconnect_init(struct sbus_connection *conn,
int status, void *pvt)
{
struct be_conn *be_conn = talloc_get_type(pvt, struct be_conn);
int ret;
/* Did we reconnect successfully? */
if (status == SBUS_RECONNECT_SUCCESS) {
DEBUG(1, ("Reconnected to the Data Provider.\n"));
/* Identify ourselves to the data provider */
ret = dp_common_send_id(be_conn->conn,
DATA_PROVIDER_VERSION,
"NSS");
/* all fine */
if (ret == EOK) return;
}
/* Failed to reconnect */
DEBUG(0, ("Could not reconnect to %s provider.\n",
be_conn->domain->name));
/* FIXME: kill the frontend and let the monitor restart it ? */
/* nss_shutdown(rctx); */
}
int nss_process_init(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct confdb_ctx *cdb)
{
struct sss_cmd_table *nss_cmds;
struct be_conn *iter;
struct nss_ctx *nctx;
int ret, max_retries;
nctx = talloc_zero(mem_ctx, struct nss_ctx);
if (!nctx) {
DEBUG(0, ("fatal error initializing nss_ctx\n"));
return ENOMEM;
}
ret = sss_ncache_init(nctx, &nctx->ncache);
if (ret != EOK) {
DEBUG(0, ("fatal error initializing negative cache\n"));
return ret;
}
nss_cmds = get_nss_cmds();
ret = sss_process_init(nctx, ev, cdb,
nss_cmds,
SSS_NSS_SOCKET_NAME, NULL,
CONFDB_NSS_CONF_ENTRY,
NSS_SBUS_SERVICE_NAME,
NSS_SBUS_SERVICE_VERSION,
&monitor_nss_interface,
"NSS", &nss_dp_interface,
&nctx->rctx);
if (ret != EOK) {
return ret;
}
nctx->rctx->pvt_ctx = nctx;
ret = nss_get_config(nctx, nctx->rctx, cdb);
if (ret != EOK) {
DEBUG(0, ("fatal error getting nss config\n"));
return ret;
}
/* Enable automatic reconnection to the Data Provider */
ret = confdb_get_int(nctx->rctx->cdb, nctx->rctx,
CONFDB_NSS_CONF_ENTRY,
CONFDB_SERVICE_RECON_RETRIES,
3, &max_retries);
if (ret != EOK) {
DEBUG(0, ("Failed to set up automatic reconnection\n"));
return ret;
}
for (iter = nctx->rctx->be_conns; iter; iter = iter->next) {
sbus_reconnect_init(iter->conn, max_retries,
nss_dp_reconnect_init, iter);
}
DEBUG(1, ("NSS Initialization complete\n"));
return EOK;
}
int main(int argc, const char *argv[])
{
int opt;
poptContext pc;
struct main_context *main_ctx;
int ret;
struct poptOption long_options[] = {
POPT_AUTOHELP
SSSD_MAIN_OPTS
POPT_TABLEEND
};
pc = poptGetContext(argv[0], argc, argv, long_options, 0);
while((opt = poptGetNextOpt(pc)) != -1) {
switch(opt) {
default:
fprintf(stderr, "\nInvalid option %s: %s\n\n",
poptBadOption(pc, 0), poptStrerror(opt));
poptPrintUsage(pc, stderr, 0);
return 1;
}
}
poptFreeContext(pc);
/* set up things like debug, signals, daemonization, etc... */
debug_log_file = "sssd_nss";
ret = server_setup("sssd[nss]", 0, CONFDB_NSS_CONF_ENTRY, &main_ctx);
if (ret != EOK) return 2;
ret = die_if_parent_died();
if (ret != EOK) {
/* This is not fatal, don't return */
DEBUG(2, ("Could not set up to exit when parent process does\n"));
}
ret = nss_process_init(main_ctx,
main_ctx->event_ctx,
main_ctx->confdb_ctx);
if (ret != EOK) return 3;
/* loop on main */
server_loop(main_ctx);
return 0;
}