sshsrv.c revision a3c8390d19593b1e5277d95bfb4ab206d4785150
/*
Authors:
Jan Cholasta <jcholast@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 <popt.h>
#include "util/util.h"
#include "confdb/confdb.h"
#include "monitor/monitor_interfaces.h"
#include "responder/common/responder.h"
#include "responder/common/responder_sbus.h"
#include "responder/ssh/sshsrv_private.h"
#include "providers/data_provider.h"
struct sbus_method monitor_ssh_methods[] = {
{ MON_CLI_METHOD_PING, monitor_common_pong },
{ MON_CLI_METHOD_RES_INIT, monitor_common_res_init },
{ MON_CLI_METHOD_ROTATE, responder_logrotate },
{ NULL, NULL }
};
struct sbus_interface monitor_ssh_interface = {
MONITOR_INTERFACE,
MONITOR_PATH,
SBUS_DEFAULT_VTABLE,
monitor_ssh_methods,
NULL
};
static struct sbus_method ssh_dp_methods[] = {
{ NULL, NULL }
};
struct sbus_interface ssh_dp_interface = {
DP_INTERFACE,
DP_PATH,
SBUS_DEFAULT_VTABLE,
ssh_dp_methods,
NULL
};
static void ssh_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(SSSDBG_TRACE_FUNC, "Reconnected to the Data Provider.\n");
/* Identify ourselves to the data provider */
ret = dp_common_send_id(be_conn->conn,
DATA_PROVIDER_VERSION,
"SSH");
/* all fine */
if (ret == EOK) {
handle_requests_after_reconnect(be_conn->rctx);
return;
}
}
/* Failed to reconnect */
DEBUG(SSSDBG_FATAL_FAILURE, "Could not reconnect to %s provider.\n",
be_conn->domain->name);
}
int ssh_process_init(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct confdb_ctx *cdb)
{
struct resp_ctx *rctx;
struct sss_cmd_table *ssh_cmds;
struct ssh_ctx *ssh_ctx;
struct be_conn *iter;
int ret;
int max_retries;
ssh_cmds = get_ssh_cmds();
ret = sss_process_init(mem_ctx, ev, cdb,
ssh_cmds,
SSS_SSH_SOCKET_NAME, NULL,
CONFDB_SSH_CONF_ENTRY,
SSS_SSH_SBUS_SERVICE_NAME,
SSS_SSH_SBUS_SERVICE_VERSION,
&monitor_ssh_interface,
"SSH",
&ssh_dp_interface,
&rctx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "sss_process_init() failed\n");
return ret;
}
ssh_ctx = talloc_zero(rctx, struct ssh_ctx);
if (!ssh_ctx) {
DEBUG(SSSDBG_FATAL_FAILURE, "fatal error initializing ssh_ctx\n");
ret = ENOMEM;
goto fail;
}
ssh_ctx->rctx = rctx;
ssh_ctx->rctx->pvt_ctx = ssh_ctx;
ret = sss_names_init_from_args(ssh_ctx,
"(?P<name>[^@]+)@?(?P<domain>[^@]*$)",
"%1$s@%2$s", &ssh_ctx->snctx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "fatal error initializing regex data\n");
goto fail;
}
/* Enable automatic reconnection to the Data Provider */
ret = confdb_get_int(ssh_ctx->rctx->cdb,
CONFDB_SSH_CONF_ENTRY,
CONFDB_SERVICE_RECON_RETRIES,
3, &max_retries);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to set up automatic reconnection\n");
goto fail;
}
for (iter = ssh_ctx->rctx->be_conns; iter; iter = iter->next) {
sbus_reconnect_init(iter->conn, max_retries,
ssh_dp_reconnect_init, iter);
}
/* Get responder options */
/* Get ssh_hash_known_hosts option */
ret = confdb_get_bool(ssh_ctx->rctx->cdb,
CONFDB_SSH_CONF_ENTRY, CONFDB_SSH_HASH_KNOWN_HOSTS,
CONFDB_DEFAULT_SSH_HASH_KNOWN_HOSTS,
&ssh_ctx->hash_known_hosts);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "Error reading from confdb (%d) [%s]\n",
ret, strerror(ret));
goto fail;
}
/* Get ssh_known_hosts_timeout option */
ret = confdb_get_int(ssh_ctx->rctx->cdb,
CONFDB_SSH_CONF_ENTRY, CONFDB_SSH_KNOWN_HOSTS_TIMEOUT,
CONFDB_DEFAULT_SSH_KNOWN_HOSTS_TIMEOUT,
&ssh_ctx->known_hosts_timeout);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "Error reading from confdb (%d) [%s]\n",
ret, strerror(ret));
goto fail;
}
ret = schedule_get_domains_task(rctx, rctx->ev, rctx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "schedule_get_domains_tasks failed.\n");
goto fail;
}
DEBUG(SSSDBG_TRACE_FUNC, "SSH Initialization complete\n");
return EOK;
fail:
talloc_free(rctx);
return ret;
}
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
};
/* Set debug level to invalid value so we can deside if -d 0 was used. */
debug_level = SSSDBG_INVALID;
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);
DEBUG_INIT(debug_level);
/* set up things like debug, signals, daemonization, etc... */
debug_log_file = "sssd_ssh";
ret = server_setup("sssd[ssh]", 0, CONFDB_SSH_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(SSSDBG_OP_FAILURE, "Could not set up to exit "
"when parent process does\n");
}
ret = ssh_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;
}