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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 "util/btreemap.h"
#include "responder/common/responder_packet.h"
#include "providers/data_provider.h"
#include "monitor/monitor_sbus.h"
#include "monitor/monitor_interfaces.h"
#include "sbus/sbus_client.h"
#include "responder/pam/pamsrv.h"
#include "../sss_client/sss_cli.h"
#define PAM_SBUS_SERVICE_VERSION 0x0001
#define PAM_SBUS_SERVICE_NAME "pam"
#define PAM_SRV_CONFIG "config/services/pam"
static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn);
static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn);
static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn);
struct sbus_method sss_sbus_methods[] = {
{SERVICE_METHOD_IDENTITY, service_identity},
{SERVICE_METHOD_PING, service_pong},
{SERVICE_METHOD_RELOAD, service_reload},
{NULL, NULL}
};
static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn)
{
dbus_uint16_t version = PAM_SBUS_SERVICE_VERSION;
const char *name = PAM_SBUS_SERVICE_NAME;
DBusMessage *reply;
dbus_bool_t ret;
DEBUG(4,("Sending ID reply: (%s,%d)\n", name, version));
reply = dbus_message_new_method_return(message);
if (!reply) return ENOMEM;
ret = dbus_message_append_args(reply,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT16, &version,
DBUS_TYPE_INVALID);
if (!ret) {
dbus_message_unref(reply);
return EIO;
}
/* send reply back */
sbus_conn_send_reply(sconn, reply);
dbus_message_unref(reply);
return EOK;
}
static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn)
{
DBusMessage *reply;
dbus_bool_t ret;
reply = dbus_message_new_method_return(message);
if (!reply) return ENOMEM;
ret = dbus_message_append_args(reply, DBUS_TYPE_INVALID);
if (!ret) {
return EIO;
}
/* send reply back */
sbus_conn_send_reply(sconn, reply);
dbus_message_unref(reply);
return EOK;
}
static void pam_shutdown(struct resp_ctx *ctx);
static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn) {
/* 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 service_pong(message, sconn);
}
static void pam_dp_reconnect_init(struct sbus_conn_ctx *sconn, int status, void *pvt)
{
int ret;
struct resp_ctx *rctx = talloc_get_type(pvt, struct resp_ctx);
/* Did we reconnect successfully? */
if (status == SBUS_RECONNECT_SUCCESS) {
/* Add the methods back to the new connection */
ret = sbus_conn_add_method_ctx(rctx->dp_ctx->scon_ctx,
rctx->dp_ctx->sm_ctx);
if (ret != EOK) {
DEBUG(0, ("Could not re-add methods on reconnection.\n"));
pam_shutdown(rctx);
}
DEBUG(1, ("Reconnected to the Data Provider.\n"));
return;
}
/* Handle failure */
DEBUG(0, ("Could not reconnect to data provider.\n"));
/* Kill the backend and let the monitor restart it */
pam_shutdown(rctx);
}
static void pam_shutdown(struct resp_ctx *rctx)
{
/* TODO: Do clean-up here */
/* Nothing left to do but exit() */
exit(0);
}
static int pam_process_init(struct main_context *main_ctx,
struct resp_ctx *rctx)
{
int ret, max_retries;
/* 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(rctx->cdb, rctx, SERVICE_CONF_ENTRY,
"reconnection_retries", 3, &max_retries);
if (ret != EOK) {
DEBUG(0, ("Failed to set up automatic reconnection\n"));
return ret;
}
sbus_reconnect_init(rctx->dp_ctx->scon_ctx, max_retries,
pam_dp_reconnect_init, rctx);
return EOK;
}
int main(int argc, const char *argv[])
{
int opt;
poptContext pc;
struct main_context *main_ctx;
int ret;
struct sbus_method *pam_dp_methods;
struct sss_cmd_table *sss_cmds;
struct resp_ctx *rctx;
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... */
ret = server_setup("sssd[pam]", 0, PAM_SRV_CONFIG, &main_ctx);
if (ret != EOK) return 2;
pam_dp_methods = register_pam_dp_methods();
sss_cmds = register_sss_cmds();
ret = sss_process_init(main_ctx,
main_ctx->event_ctx,
main_ctx->confdb_ctx,
sss_sbus_methods,
sss_cmds,
SSS_PAM_SOCKET_NAME,
SSS_PAM_PRIV_SOCKET_NAME,
PAM_SRV_CONFIG,
pam_dp_methods,
&rctx);
if (ret != EOK) return 3;
ret = pam_process_init(main_ctx, rctx);
if (ret != EOK) return 4;
/* loop on main */
server_loop(main_ctx);
return 0;
}
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