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/*
SSSD
PAM Responder
Copyright (C) Simo Sorce <ssorce@redhat.com> 2009
Copyright (C) Sumit Bose <sbose@redhat.com> 2009
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 "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"
#include "responder/pam/pamsrv.h"
#define PAM_SBUS_SERVICE_VERSION 0x0001
#define PAM_SBUS_SERVICE_NAME "pam"
static int service_reload(DBusMessage *message, struct sbus_connection *conn);
struct sbus_method monitor_pam_methods[] = {
{ MON_CLI_METHOD_PING, monitor_common_pong },
{ MON_CLI_METHOD_RELOAD, service_reload },
{ MON_CLI_METHOD_RES_INIT, monitor_common_res_init },
{ NULL, NULL }
};
struct sbus_interface monitor_pam_interface = {
MONITOR_INTERFACE,
MONITOR_PATH,
SBUS_DEFAULT_VTABLE,
monitor_pam_methods,
NULL
};
static int service_reload(DBusMessage *message, struct sbus_connection *conn) {
/* Monitor calls this function when we need to reload
* our configuration information. Perform whatever steps
* are needed to update the configuration objects.
*/
/* Send an empty reply to acknowledge receipt */
return monitor_common_pong(message, conn);
}
static struct sbus_method pam_dp_methods[] = {
{ NULL, NULL }
};
struct sbus_interface pam_dp_interface = {
DP_INTERFACE,
DP_PATH,
SBUS_DEFAULT_VTABLE,
pam_dp_methods,
NULL
};
static void pam_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,
"PAM", be_conn->domain->name);
/* all fine */
if (ret == EOK) return;
}
/* Handle failure */
DEBUG(0, ("Could not reconnect to %s provider.\n",
be_conn->domain->name));
/* FIXME: kill the frontend and let the monitor restart it ? */
/* pam_shutdown(rctx); */
}
static errno_t pam_get_config(struct pam_ctx *pctx,
struct resp_ctx *rctx,
struct confdb_ctx *cdb)
{
int ret = EOK;
ret = confdb_get_int(cdb, pctx, CONFDB_PAM_CONF_ENTRY,
CONFDB_PAM_CRED_TIMEOUT, 0,
&pctx->cred_expiration);
return ret;
}
static int pam_process_init(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct confdb_ctx *cdb)
{
struct sss_cmd_table *pam_cmds;
struct be_conn *iter;
struct pam_ctx *pctx;
int ret, max_retries;
pctx = talloc_zero(mem_ctx, struct pam_ctx);
if (!pctx) {
return ENOMEM;
}
pam_cmds = get_pam_cmds();
ret = sss_process_init(pctx, ev, cdb,
pam_cmds,
SSS_PAM_SOCKET_NAME,
SSS_PAM_PRIV_SOCKET_NAME,
CONFDB_PAM_CONF_ENTRY,
PAM_SBUS_SERVICE_NAME,
PAM_SBUS_SERVICE_VERSION,
&monitor_pam_interface,
"PAM", &pam_dp_interface,
&pctx->rctx);
if (ret != EOK) {
return ret;
}
pctx->rctx->pvt_ctx = pctx;
ret = pam_get_config(pctx, pctx->rctx, pctx->rctx->cdb);
/* Enable automatic reconnection to the Data Provider */
/* FIXME: "retries" is too generic, either get it from a global config
* or specify these retries are about the sbus connections to DP */
ret = confdb_get_int(pctx->rctx->cdb, pctx->rctx, CONFDB_PAM_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 = pctx->rctx->be_conns; iter; iter = iter->next) {
sbus_reconnect_init(iter->conn, max_retries,
pam_dp_reconnect_init, iter);
}
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
{ NULL }
};
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_pam";
ret = server_setup("sssd[pam]", 0, CONFDB_PAM_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 = pam_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;
}
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