rest: add GET /efi

Add GET /efi request to obtain information about the client's
boot entries.

Field inside the /refresh payload
'efi': {
  'entries': [
    {
      "order": 0,
      "name": "Boot0000",
      "active": false,
      "description": "grub"
    },
    {
      "order": 1,
      "name": "Boot0001",
      "active": true,
      "description": "UEFI: PXE IP4 Realtek PCIe GBE Family Controller"
    }
  ]
}

If the client is not a EFI system it won't add the 'efi' field.
If an entry is not in the boot order it won't have the 'order' field.

GET /efi resquest payload structure:
{
    'clients': ['10.141.10.21', '10.141.10.22']
}

GET /efi response's structure:
{
  'clients': [
    {
      'ip': '10.141.10.21',
      'entries': [
        {
          "order": 0,
          "name": "Boot0000",
          "active": false,
          "description": "grub"
        },
        {
          "order": 1,
          "name": "Boot0001",
          "active": true,
          "description": "UEFI: PXE IP4 Realtek PCIe GBE Family Controller"
        }
      ]
    },
    {
      'ip': '10.141.10.22',
      'entries': []
    }
  ]
}

The client with ip 10.141.10.22 is a BIOS system.

If an entry does not appear in the boot order it won't have the
'order' field.

1 files changed, 151 insertions, 0 deletions

diff --git a/src/rest.c b/src/rest.c
index 1894111..99fbe1f 100644
--- a/src/rest.c
+++ b/src/rest.c
@@ -4337,6 +4337,143 @@ static int og_cmd_cache_list(json_t *element, struct og_msg_params *params,
 	return 0;
 }
 
+static int og_dbi_client_efi_get(struct og_dbi *dbi, json_t *clients, const char *ip)
+{
+	json_t *client_data, *boot_entry, *boot_entry_arr;
+	const char *msglog, *entry_name, *entry_description;
+	bool entry_active;
+	int entry_order;
+	dbi_result result;
+
+	client_data = json_object();
+	if (!client_data)
+		return -1;
+
+	json_object_set_new(client_data, "ip", json_string(ip));
+
+	result = dbi_conn_queryf(dbi->conn,
+		"SELECT boot_entries.name, boot_entries.active, "
+		"boot_entries.description, boot_entries.entry_order "
+		"FROM boot_entries JOIN ordenadores "
+		"ON ordenadores.idordenador = boot_entries.client_id "
+		"WHERE ordenadores.ip = '%s' "
+		"ORDER BY "
+		"    CASE "
+		"        WHEN boot_entries.entry_order >= 0 THEN 0 ELSE 1 "
+		"    END ASC, "
+		"    boot_entries.entry_order ASC", ip);
+
+	if (!result) {
+		json_decref(client_data);
+		dbi_conn_error(dbi->conn, &msglog);
+		syslog(LOG_ERR, "failed to query database (%s:%d) %s\n",
+		       __func__, __LINE__, msglog);
+		return -1;
+	}
+
+	boot_entry_arr = json_array();
+	if (!boot_entry_arr) {
+		json_decref(client_data);
+		dbi_result_free(result);
+		return -1;
+	}
+
+	while (dbi_result_next_row(result)) {
+		entry_name = dbi_result_get_string(result, "name");
+		entry_active = dbi_result_get_int(result, "active") != 0;
+		entry_description = dbi_result_get_string(result, "description");
+		entry_order = dbi_result_get_int(result, "entry_order");
+
+		boot_entry = json_object();
+		if (!boot_entry) {
+			json_decref(client_data);
+			json_decref(boot_entry_arr);
+			dbi_result_free(result);
+			return -1;
+		}
+
+		json_object_set_new(boot_entry, "name", json_string(entry_name));
+		json_object_set_new(boot_entry, "active", json_boolean(entry_active));
+		json_object_set_new(boot_entry, "description", json_string(entry_description));
+		if (entry_order >= 0)
+			json_object_set_new(boot_entry, "order", json_integer(entry_order));
+		json_array_append_new(boot_entry_arr, boot_entry);
+	}
+	json_object_set_new(client_data, "entries", boot_entry_arr);
+	json_array_append_new(clients, client_data);
+	dbi_result_free(result);
+
+	return 0;
+}
+
+static int og_cmd_efi_list(json_t *element, struct og_msg_params *params,
+			    char *buffer_reply)
+{
+	json_t *value, *root, *clients;
+	struct og_dbi *dbi;
+	const char *key;
+	int err = 0, i;
+
+	struct og_buffer og_buffer = {
+		.data = buffer_reply
+	};
+
+	if (json_typeof(element) != JSON_OBJECT)
+		return -1;
+
+	json_object_foreach(element, key, value) {
+		if (!strcmp(key, "clients"))
+			err = og_json_parse_clients(value, params);
+		else
+			err = -1;
+
+		if (err < 0)
+			return err;
+	}
+
+	if (!og_msg_params_validate(params, OG_REST_PARAM_ADDR))
+		return -1;
+
+	clients = json_array();
+	if (!clients)
+		return -1;
+
+	dbi = og_dbi_open(&ogconfig.db);
+	if (!dbi) {
+		syslog(LOG_ERR, "cannot open connection database (%s:%d)\n",
+		       __func__, __LINE__);
+		json_decref(clients);
+		return -1;
+	}
+
+	for (i = 0; i < params->ips_array_len; i++) {
+		if (og_dbi_client_efi_get(dbi, clients, params->ips_array[i]) < 0) {
+			json_decref(clients);
+			og_dbi_close(dbi);
+			return -1;
+		}
+	}
+
+	og_dbi_close(dbi);
+
+	root = json_object();
+	if (!root) {
+		json_decref(clients);
+		return -1;
+	}
+
+	json_object_set_new(root, "clients", clients);
+
+	if (json_dump_callback(root, og_json_dump_clients, &og_buffer, JSON_ENSURE_ASCII)) {
+		json_decref(root);
+		return -1;
+	}
+
+	json_decref(root);
+
+	return 0;
+}
+
 static int og_cmd_cache_delete(json_t *element, struct og_msg_params *params,
 			    char *buffer_reply)
 {
@@ -8317,6 +8454,7 @@ struct {
 	[OG_URI_CACHE_LIST]	= { "cache/list", },
 	[OG_URI_CACHE_DELETE]	= { "cache/delete", },
 	[OG_URI_CACHE_FETCH]	= { "cache/fetch", },
+	[OG_URI_EFI]	= { "efi", },
 	[OG_URI_PART_SETUP]	= { "setup", },
 	[OG_URI_RUN_SCHEDULE]	= { "run/schedule", },
 	[OG_URI_TASK_RUN]	= { "task/run", },
@@ -8928,6 +9066,19 @@ int og_client_state_process_payload_rest(struct og_client *cli)
 			goto err_process_rest_payload;
 		}
 		err = og_cmd_cache_list(root, &params, buf_reply);
+	} else if (!strncmp(cmd, "efi", strlen("efi"))) {
+		if (method != OG_METHOD_GET) {
+			err = og_client_method_not_found(cli);
+			goto err_process_rest_payload;
+		}
+
+		if (!root) {
+			syslog(LOG_ERR,
+			       "command efi with no payload\n");
+			err = og_client_bad_request(cli);
+			goto err_process_rest_payload;
+		}
+		err = og_cmd_efi_list(root, &params, buf_reply);
 	} else if (!strncmp(cmd, "cache/delete", strlen("cache/delete"))) {
 		if (method != OG_METHOD_POST) {
 			err = og_client_method_not_found(cli);