IFP: Re-add the InfoPipe server

Related:
https://fedorahosted.org/sssd/ticket/2072

This commit only adds the responder and the needed plumbing. No DBus
related code is in yet.

3 files changed, 294 insertions, 0 deletions

diff --git a/src/responder/ifp/ifp_private.h b/src/responder/ifp/ifp_private.h
new file mode 100644
index 000000000..32c7281ea
--- /dev/null
+++ b/src/responder/ifp/ifp_private.h
@@ -0,0 +1,35 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: A private header
+
+    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/>.
+*/
+
+#ifndef _IFPSRV_PRIVATE_H_
+#define _IFPSRV_PRIVATE_H_
+
+#include "responder/common/responder.h"
+#include "providers/data_provider.h"
+
+struct ifp_ctx {
+    struct resp_ctx *rctx;
+    struct sss_names_ctx *snctx;
+};
+
+#endif /* _IFPSRV_PRIVATE_H_ */
diff --git a/src/responder/ifp/ifpsrv.c b/src/responder/ifp/ifpsrv.c
new file mode 100644
index 000000000..06434c328
--- /dev/null
+++ b/src/responder/ifp/ifpsrv.c
@@ -0,0 +1,227 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: the responder server
+
+    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 <dbus/dbus.h>
+
+#include "util/util.h"
+#include "sbus/sssd_dbus.h"
+#include "monitor/monitor_interfaces.h"
+#include "confdb/confdb.h"
+#include "responder/ifp/ifp_private.h"
+#include "responder/common/responder_sbus.h"
+
+struct mon_cli_iface monitor_ifp_methods = {
+    { &mon_cli_iface_meta, 0 },
+    .ping = monitor_common_pong,
+    .resInit = monitor_common_res_init,
+    .shutDown = NULL,
+    .goOffline = NULL,
+    .resetOffline = NULL,
+    .rotateLogs = responder_logrotate,
+};
+
+static struct data_provider_iface ifp_dp_methods = {
+    { &data_provider_iface_meta, 0 },
+    .RegisterService = NULL,
+    .pamHandler = NULL,
+    .sudoHandler = NULL,
+    .autofsHandler = NULL,
+    .hostHandler = NULL,
+    .getDomains = NULL,
+    .getAccountInfo = NULL,
+};
+
+struct sss_cmd_table *get_ifp_cmds(void)
+{
+    static struct sss_cmd_table ifp_cmds[] = {
+        { SSS_GET_VERSION, sss_cmd_get_version },
+        { SSS_CLI_NULL, NULL}
+    };
+
+    return ifp_cmds;
+}
+
+static void ifp_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,
+                                "InfoPipe");
+        /* 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 ifp_process_init(TALLOC_CTX *mem_ctx,
+                     struct tevent_context *ev,
+                     struct confdb_ctx *cdb)
+{
+    struct resp_ctx *rctx;
+    struct sss_cmd_table *ifp_cmds;
+    struct ifp_ctx *ifp_ctx;
+    struct be_conn *iter;
+    int ret;
+    int max_retries;
+
+    ifp_cmds = get_ifp_cmds();
+    ret = sss_process_init(mem_ctx, ev, cdb,
+                           ifp_cmds,
+                           SSS_IFP_SOCKET_NAME, NULL,
+                           CONFDB_IFP_CONF_ENTRY,
+                           SSS_IFP_SBUS_SERVICE_NAME,
+                           SSS_IFP_SBUS_SERVICE_VERSION,
+                           &monitor_ifp_methods,
+                           "InfoPipe",
+                           &ifp_dp_methods.vtable,
+                           &rctx);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "sss_process_init() failed\n");
+        return ret;
+    }
+
+    ifp_ctx = talloc_zero(rctx, struct ifp_ctx);
+    if (ifp_ctx == NULL) {
+        DEBUG(SSSDBG_FATAL_FAILURE, "fatal error initializing ifp_ctx\n");
+        ret = ENOMEM;
+        goto fail;
+    }
+
+    ifp_ctx->rctx = rctx;
+    ifp_ctx->rctx->pvt_ctx = ifp_ctx;
+
+    ret = sss_names_init_from_args(ifp_ctx,
+                                   "(?P<name>[^@]+)@?(?P<domain>[^@]*$)",
+                                   "%1$s@%2$s", &ifp_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(ifp_ctx->rctx->cdb,
+                         CONFDB_IFP_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 = ifp_ctx->rctx->be_conns; iter; iter = iter->next) {
+        sbus_reconnect_init(iter->conn, max_retries,
+                            ifp_dp_reconnect_init, iter);
+    }
+
+    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, "InfoPipe 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_ifp";
+
+    ret = server_setup("sssd[ifp]", 0, CONFDB_IFP_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_MINOR_FAILURE,
+              "Could not set up to exit when parent process does\n");
+    }
+
+    ret = ifp_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;
+}
diff --git a/src/responder/ifp/ifpsrv_cmd.c b/src/responder/ifp/ifpsrv_cmd.c
new file mode 100644
index 000000000..b9641ff60
--- /dev/null
+++ b/src/responder/ifp/ifpsrv_cmd.c
@@ -0,0 +1,32 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2013 Red Hat
+
+    InfoPipe responder: the responder commands
+
+    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 "responder/ifp/ifp_private.h"
+
+struct cli_protocol_version *register_cli_protocol_version(void)
+{
+    static struct cli_protocol_version ssh_cli_protocol_version[] = {
+        {0, NULL, NULL}
+    };
+
+    return ssh_cli_protocol_version;
+}