SSH: Add dp_get_host_send to common responder code

Instead of using account_info request, creates a new ssh specific
request. This improves code readability and will make the code more
flexible in the future.

https://fedorahosted.org/sssd/ticket/1176

3 files changed, 184 insertions, 9 deletions

diff --git a/src/responder/ssh/sshsrv_cmd.c b/src/responder/ssh/sshsrv_cmd.c
index 0740cd25c..fa02025e8 100644
--- a/src/responder/ssh/sshsrv_cmd.c
+++ b/src/responder/ssh/sshsrv_cmd.c
@@ -55,7 +55,6 @@ sss_ssh_cmd_get_user_pubkeys(struct cli_ctx *cctx)
         return ENOMEM;
     }
     cmd_ctx->cctx = cctx;
-    cmd_ctx->type = SSS_DP_USER;
 
     ret = ssh_cmd_parse_request(cmd_ctx);
     if (ret != EOK) {
@@ -98,7 +97,6 @@ sss_ssh_cmd_get_host_pubkeys(struct cli_ctx *cctx)
         return ENOMEM;
     }
     cmd_ctx->cctx = cctx;
-    cmd_ctx->type = SSS_DP_HOST;
 
     ret = ssh_cmd_parse_request(cmd_ctx);
     if (ret != EOK) {
@@ -139,9 +137,9 @@ ssh_dp_send_req_done(struct tevent_req *req)
     dbus_uint32_t err_min;
     char *err_msg;
 
-    ret = sss_dp_get_account_recv(cb_ctx->mem_ctx, req,
-                                  &err_maj, &err_min,
-                                  &err_msg);
+    ret = sss_dp_get_ssh_host_recv(cb_ctx->mem_ctx, req,
+                                   &err_maj, &err_min,
+                                   &err_msg);
     talloc_zfree(req);
     if (ret != EOK) {
         DEBUG(SSSDBG_CRIT_FAILURE,
@@ -312,9 +310,9 @@ ssh_host_pubkeys_search(struct ssh_cmd_ctx *cmd_ctx)
 
     /* refresh the host's cache entry */
     if (NEED_CHECK_PROVIDER(cmd_ctx->domain->provider)) {
-        req = sss_dp_get_account_send(cmd_ctx, cmd_ctx->cctx->rctx,
-                                      cmd_ctx->domain, false, SSS_DP_HOST,
-                                      cmd_ctx->name, 0, cmd_ctx->alias);
+        req = sss_dp_get_ssh_host_send(cmd_ctx, cmd_ctx->cctx->rctx,
+                                       cmd_ctx->domain, false,
+                                       cmd_ctx->name, cmd_ctx->alias);
         if (!req) {
             DEBUG(SSSDBG_CRIT_FAILURE,
                   ("Out of memory sending data provider request\n"));
diff --git a/src/responder/ssh/sshsrv_dp.c b/src/responder/ssh/sshsrv_dp.c
new file mode 100644
index 000000000..dbdcd479e
--- /dev/null
+++ b/src/responder/ssh/sshsrv_dp.c
@@ -0,0 +1,163 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@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 <talloc.h>
+#include <tevent.h>
+#include <dbus/dbus.h>
+#include "sbus/sssd_dbus.h"
+
+#include "util/util.h"
+#include "sbus/sbus_client.h"
+#include "providers/data_provider.h"
+#include "responder/common/responder.h"
+
+struct sss_dp_get_ssh_host_info {
+    struct sss_domain_info *dom;
+
+    bool fast_reply;
+    const char *name;
+    const char *alias;
+};
+
+static DBusMessage *
+sss_dp_get_ssh_host_msg(void *pvt);
+
+struct tevent_req *
+sss_dp_get_ssh_host_send(TALLOC_CTX *mem_ctx,
+                         struct resp_ctx *rctx,
+                         struct sss_domain_info *dom,
+                         bool fast_reply,
+                         const char *name,
+                         const char *alias)
+{
+    errno_t ret;
+    struct tevent_req *req;
+    struct sss_dp_get_ssh_host_info *info;
+    struct sss_dp_req_state *state;
+    char *key;
+
+    req = tevent_req_create(mem_ctx, &state, struct sss_dp_req_state);
+    if (!req) {
+        ret = ENOMEM;
+        goto error;
+    }
+
+    if (!dom) {
+        ret = EINVAL;
+        goto error;
+    }
+
+    info = talloc_zero(state, struct sss_dp_get_ssh_host_info);
+    info->fast_reply = fast_reply;
+    info->name = name;
+    info->alias = alias;
+    info->dom = dom;
+
+    if (alias) {
+        key = talloc_asprintf(state, "%s:%s@%s", name, alias, dom->name);
+    } else {
+        key = talloc_asprintf(state, "%s@%s", name, dom->name);
+    }
+    if (!key) {
+        ret = ENOMEM;
+        goto error;
+    }
+
+    ret = sss_dp_issue_request(state, rctx, key, dom, sss_dp_get_ssh_host_msg,
+                               info, req);
+    talloc_free(key);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE,
+              ("Could not issue DP request [%d]: %s\n",
+               ret, strerror(ret)));
+        goto error;
+    }
+
+    return req;
+
+error:
+    tevent_req_error(req, ret);
+    tevent_req_post(req, rctx->ev);
+    return req;
+}
+
+static DBusMessage *
+sss_dp_get_ssh_host_msg(void *pvt)
+{
+    DBusMessage *msg;
+    dbus_bool_t dbret;
+    struct sss_dp_get_ssh_host_info *info;
+    uint32_t be_type = 0;
+    char *filter;
+
+    info = talloc_get_type(pvt, struct sss_dp_get_ssh_host_info);
+
+    if (info->fast_reply) {
+        be_type |= BE_REQ_FAST;
+    }
+
+    if (info->alias) {
+        filter = talloc_asprintf(info, "name=%s:%s", info->name, info->alias);
+    } else {
+        filter = talloc_asprintf(info, "name=%s", info->name);
+    }
+    if (!filter) {
+        DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory?!\n"));
+        return NULL;
+    }
+
+    msg = dbus_message_new_method_call(NULL,
+                                       DP_PATH,
+                                       DP_INTERFACE,
+                                       DP_METHOD_HOSTHANDLER);
+    if (msg == NULL) {
+        DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory?!\n"));
+        talloc_free(filter);
+        return NULL;
+    }
+
+    /* create the message */
+    DEBUG(SSSDBG_TRACE_FUNC,
+          ("Creating SSH host request for [%s][%u][%s]\n",
+           info->dom->name, be_type, filter));
+
+    dbret = dbus_message_append_args(msg,
+                                     DBUS_TYPE_UINT32, &be_type,
+                                     DBUS_TYPE_STRING, &filter,
+                                     DBUS_TYPE_INVALID);
+    talloc_free(filter);
+    if (!dbret) {
+        DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to build message\n"));
+        dbus_message_unref(msg);
+        return NULL;
+    }
+
+    return msg;
+}
+
+errno_t
+sss_dp_get_ssh_host_recv(TALLOC_CTX *mem_ctx,
+                         struct tevent_req *req,
+                         dbus_uint16_t *dp_err,
+                         dbus_uint32_t *dp_ret,
+                         char **err_msg)
+{
+    return sss_dp_req_recv(mem_ctx, req, dp_err, dp_ret, err_msg);
+}
diff --git a/src/responder/ssh/sshsrv_private.h b/src/responder/ssh/sshsrv_private.h
index d74b49250..e63a3105c 100644
--- a/src/responder/ssh/sshsrv_private.h
+++ b/src/responder/ssh/sshsrv_private.h
@@ -37,7 +37,6 @@ struct ssh_ctx {
 
 struct ssh_cmd_ctx {
     struct cli_ctx *cctx;
-    enum sss_dp_acct_type type;
     char *name;
     char *alias;
     char *domname;
@@ -51,4 +50,19 @@ struct ssh_cmd_ctx {
 
 struct sss_cmd_table *get_ssh_cmds(void);
 
+struct tevent_req *
+sss_dp_get_ssh_host_send(TALLOC_CTX *mem_ctx,
+                         struct resp_ctx *rctx,
+                         struct sss_domain_info *dom,
+                         bool fast_reply,
+                         const char *name,
+                         const char *alias);
+
+errno_t
+sss_dp_get_ssh_host_recv(TALLOC_CTX *mem_ctx,
+                         struct tevent_req *req,
+                         dbus_uint16_t *dp_err,
+                         dbus_uint32_t *dp_ret,
+                         char **err_msg);
+
 #endif /* _SSHSRV_PRIVATE_H_ */