/*
This file is part of GNUnet.
Copyright (C) 2012-2015 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Martin Schanzenbach
* @author Philippe Buschmann
* @file namestore/plugin_rest_namestore.c
* @brief GNUnet Namestore REST plugin
*/
#include "platform.h"
#include "gnunet_error_codes.h"
#include "gnunet_rest_plugin.h"
#include "gnunet_gns_service.h"
#include "gnunet_namestore_service.h"
#include "gnunet_identity_service.h"
#include "gnunet_rest_lib.h"
#include "gnunet_gnsrecord_json_lib.h"
#include "microhttpd.h"
#include
/**
* Namestore namespace
*/
#define GNUNET_REST_API_NS_NAMESTORE "/namestore"
/**
* Namestore import API namespace
*/
#define GNUNET_REST_API_NS_NAMESTORE_IMPORT "/namestore/import"
/**
* State while collecting all egos
*/
#define ID_REST_STATE_INIT 0
/**
* Done collecting egos
*/
#define ID_REST_STATE_POST_INIT 1
/**
* The configuration handle
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* HTTP methods allows for this plugin
*/
static char *allow_methods;
/**
* Ego list
*/
static struct EgoEntry *ego_head;
/**
* Ego list
*/
static struct EgoEntry *ego_tail;
/**
* The processing state
*/
static int state;
/**
* Handle to NAMESTORE
*/
static struct GNUNET_NAMESTORE_Handle *ns_handle;
/**
* Handle to Identity service.
*/
static struct GNUNET_IDENTITY_Handle *identity_handle;
/**
* @brief struct returned by the initialization function of the plugin
*/
struct Plugin
{
const struct GNUNET_CONFIGURATION_Handle *cfg;
};
/**
* The default namestore ego
*/
struct EgoEntry
{
/**
* DLL
*/
struct EgoEntry *next;
/**
* DLL
*/
struct EgoEntry *prev;
/**
* Ego Identifier
*/
char *identifier;
/**
* Public key string
*/
char *keystring;
/**
* The Ego
*/
struct GNUNET_IDENTITY_Ego *ego;
};
enum UpdateStrategy
{
UPDATE_STRATEGY_REPLACE,
UPDATE_STRATEGY_APPEND
};
/**
* The request handle
*/
struct RequestHandle
{
/**
* DLL
*/
struct RequestHandle *next;
/**
* DLL
*/
struct RequestHandle *prev;
/**
* Records to store
*/
char *record_name;
/**
* Record type filter
*/
uint32_t record_type;
/**
* How to update the record set
*/
enum UpdateStrategy update_strategy;
/**
* Records to store
*/
struct GNUNET_GNSRECORD_Data *rd;
/**
* Number of records in rd
*/
unsigned int rd_count;
/**
* RecordInfo array
*/
struct GNUNET_NAMESTORE_RecordInfo *ri;
/**
* Size of record info
*/
unsigned int rd_set_count;
/**
* Position of record info
*/
unsigned int rd_set_pos;
/**
* NAMESTORE Operation
*/
struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
/**
* For bulk import, we need a dedicated Namestore handle
*/
struct GNUNET_NAMESTORE_Handle *nc;
/**
* Response object
*/
json_t *resp_object;
/**
* Handle to NAMESTORE it
*/
struct GNUNET_NAMESTORE_ZoneIterator *list_it;
/**
* Private key for the zone
*/
const struct GNUNET_IDENTITY_PrivateKey *zone_pkey;
/**
* IDENTITY Operation
*/
struct EgoEntry *ego_entry;
/**
* IDENTITY Operation
*/
struct GNUNET_IDENTITY_Operation *op;
/**
* Rest connection
*/
struct GNUNET_REST_RequestHandle *rest_handle;
/**
* Desired timeout for the lookup (default is no timeout).
*/
struct GNUNET_TIME_Relative timeout;
/**
* ID of a task associated with the resolution process.
*/
struct GNUNET_SCHEDULER_Task *timeout_task;
/**
* The plugin result processor
*/
GNUNET_REST_ResultProcessor proc;
/**
* The closure of the result processor
*/
void *proc_cls;
/**
* The url
*/
char *url;
/**
* Error code
*/
enum GNUNET_ErrorCode ec;
};
/**
* DLL
*/
static struct RequestHandle *requests_head;
/**
* DLL
*/
static struct RequestHandle *requests_tail;
/**
* Cleanup lookup handle
* @param cls Handle to clean up
*/
static void
cleanup_handle (void *cls)
{
struct RequestHandle *handle = cls;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up\n");
if (NULL != handle->timeout_task)
{
GNUNET_SCHEDULER_cancel (handle->timeout_task);
handle->timeout_task = NULL;
}
if (NULL != handle->record_name)
GNUNET_free (handle->record_name);
if (NULL != handle->url)
GNUNET_free (handle->url);
if (NULL != handle->rd)
{
for (int i = 0; i < handle->rd_count; i++)
{
if (NULL != handle->rd[i].data)
GNUNET_free_nz ((void *) handle->rd[i].data);
}
GNUNET_free (handle->rd);
}
if (NULL != handle->timeout_task)
GNUNET_SCHEDULER_cancel (handle->timeout_task);
if (NULL != handle->list_it)
GNUNET_NAMESTORE_zone_iteration_stop (handle->list_it);
if (NULL != handle->ns_qe)
GNUNET_NAMESTORE_cancel (handle->ns_qe);
if (NULL != handle->nc)
GNUNET_NAMESTORE_disconnect (handle->nc);
if (NULL != handle->resp_object)
{
json_decref (handle->resp_object);
}
GNUNET_CONTAINER_DLL_remove (requests_head,
requests_tail,
handle);
GNUNET_free (handle);
}
/**
* Task run on errors. Reports an error and cleans up everything.
*
* @param cls the `struct RequestHandle`
*/
static void
do_error (void *cls)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
json_t *json_error = json_object ();
char *response;
const char* emsg;
int response_code;
emsg = GNUNET_ErrorCode_get_hint (handle->ec);
json_object_set_new (json_error, "error", json_string (emsg));
json_object_set_new (json_error, "error_code", json_integer (handle->ec));
response_code = GNUNET_ErrorCode_get_http_status (handle->ec);
if (0 == response_code)
response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
response = json_dumps (json_error, 0);
resp = GNUNET_REST_create_response (response);
GNUNET_assert (MHD_YES ==
MHD_add_response_header (resp, "Content-Type",
"application/json"));
handle->proc (handle->proc_cls, resp, response_code);
json_decref (json_error);
GNUNET_free (response);
cleanup_handle (handle);
}
/**
* Get EgoEntry from list with either a public key or a name
* If public key and name are not NULL, it returns the public key result first
*
* @param handle the RequestHandle
* @param pubkey the public key of an identity (only one can be NULL)
* @param name the name of an identity (only one can be NULL)
* @return EgoEntry or NULL if not found
*/
struct EgoEntry *
get_egoentry_namestore (struct RequestHandle *handle, char *name)
{
struct EgoEntry *ego_entry;
char *copy = GNUNET_strdup (name);
char *tmp;
if (NULL == name)
return NULL;
tmp = strtok (copy, "/");
if (NULL == tmp)
return NULL;
for (ego_entry = ego_head; NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (0 != strcasecmp (tmp, ego_entry->identifier))
continue;
GNUNET_free (copy);
return ego_entry;
}
GNUNET_free (copy);
return NULL;
}
/**
* Does internal server error when iteration failed.
*
* @param cls the `struct RequestHandle`
*/
static void
namestore_iteration_error (void *cls)
{
struct RequestHandle *handle = cls;
handle->ec = GNUNET_EC_NAMESTORE_ITERATION_FAILED;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
static void
create_finished (void *cls, enum GNUNET_ErrorCode ec)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->ns_qe = NULL;
handle->ec = ec;
if (GNUNET_EC_NONE != ec)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
static void
del_finished (void *cls, enum GNUNET_ErrorCode ec)
{
struct RequestHandle *handle = cls;
handle->ns_qe = NULL;
handle->ec = ec;
if (GNUNET_EC_NONE != ec)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->proc (handle->proc_cls,
GNUNET_REST_create_response (NULL),
MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Iteration over all results finished, build final
* response.
*
* @param cls the `struct RequestHandle`
*/
static void
namestore_list_finished (void *cls)
{
struct RequestHandle *handle = cls;
char *result_str;
struct MHD_Response *resp;
handle->list_it = NULL;
if (NULL == handle->resp_object)
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_EMPTY;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
result_str = json_dumps (handle->resp_object, 0);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
resp = GNUNET_REST_create_response (result_str);
GNUNET_assert (MHD_YES ==
MHD_add_response_header (resp, "Content-Type",
"application/json"));
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_free (result_str);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Create a response with requested records
*
* @param handle the RequestHandle
*/
static void
namestore_list_iteration (void *cls,
const struct GNUNET_IDENTITY_PrivateKey *zone_key,
const char *rname,
unsigned int rd_len,
const struct GNUNET_GNSRECORD_Data *rd,
struct GNUNET_TIME_Absolute expiry)
{
struct RequestHandle *handle = cls;
struct GNUNET_GNSRECORD_Data rd_filtered[rd_len];
json_t *record_obj;
int i = 0;
int j = 0;
if (rd_len == 0)
{
/** skip **/
GNUNET_NAMESTORE_zone_iterator_next (handle->list_it, 1);
return;
}
for (i = 0; i < rd_len; i++)
{
if ((GNUNET_GNSRECORD_TYPE_ANY != handle->record_type) &&
(rd[i].record_type != handle->record_type))
continue; /* Apply filter */
rd_filtered[j] = rd[i];
rd_filtered[j].data = rd[i].data;
j++;
}
/** Only add if not empty **/
if (j > 0)
{
if (NULL == handle->resp_object)
handle->resp_object = json_array ();
record_obj = GNUNET_GNSRECORD_JSON_from_gnsrecord (rname,
rd_filtered,
j);
json_array_append_new (handle->resp_object, record_obj);
}
GNUNET_NAMESTORE_zone_iterator_next (handle->list_it, 1);
}
/**
* Handle lookup error
*
* @param cls the request handle
*/
static void
ns_lookup_error_cb (void *cls)
{
struct RequestHandle *handle = cls;
handle->ec = GNUNET_EC_NAMESTORE_LOOKUP_ERROR;
GNUNET_SCHEDULER_add_now (&do_error, handle);
}
static void
ns_get_lookup_cb (void *cls,
const struct GNUNET_IDENTITY_PrivateKey *zone,
const char *label,
unsigned int rd_len,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
struct GNUNET_GNSRECORD_Data rd_filtered[rd_len];
int i = 0;
int j = 0;
handle->ns_qe = NULL;
for (i = 0; i < rd_len; i++)
{
if ((GNUNET_GNSRECORD_TYPE_ANY != handle->record_type) &&
(rd[i].record_type != handle->record_type))
continue; /* Apply filter */
rd_filtered[j] = rd[i];
rd_filtered[j].data = rd[i].data;
j++;
}
/** Return 404 if no set was found **/
if (j == 0)
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->resp_object = GNUNET_GNSRECORD_JSON_from_gnsrecord (label,
rd_filtered,
j);
GNUNET_SCHEDULER_add_now (&namestore_list_finished, handle);
}
/**
* Handle namestore GET request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_get (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct GNUNET_HashCode key;
enum GNUNET_GNSRECORD_Filter filter_flags;
char *egoname;
char *labelname;
char *typename;
char *boolstring;
egoname = NULL;
ego_entry = NULL;
// set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) + 1 >= strlen (handle->url))
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE) + 1];
ego_entry = get_egoentry_namestore (handle, egoname);
if (NULL == ego_entry)
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
GNUNET_CRYPTO_hash ("record_type", strlen ("record_type"), &key);
handle->record_type = GNUNET_GNSRECORD_TYPE_ANY;
if (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (con_handle->url_param_map, &key))
{
typename = GNUNET_CONTAINER_multihashmap_get (con_handle->url_param_map,
&key);
if (NULL != typename)
handle->record_type = GNUNET_GNSRECORD_typename_to_number (typename);
}
GNUNET_CRYPTO_hash ("omit_private", strlen ("omit_private"), &key);
filter_flags = GNUNET_GNSRECORD_FILTER_NONE;
if (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (con_handle->url_param_map, &key))
{
boolstring = GNUNET_CONTAINER_multihashmap_get (con_handle->url_param_map,
&key);
if ((0 == strcmp (boolstring, "1")) ||
(0 == strcmp (boolstring, "yes")) ||
(0 == strcmp (boolstring, "true")))
filter_flags = GNUNET_GNSRECORD_FILTER_OMIT_PRIVATE;
}
GNUNET_CRYPTO_hash ("include_maintenance", strlen ("include_maintenance"),
&key);
if (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (con_handle->url_param_map, &key))
{
boolstring = GNUNET_CONTAINER_multihashmap_get (con_handle->url_param_map,
&key);
if ((0 == strcmp (boolstring, "1")) ||
(0 == strcmp (boolstring, "yes")) ||
(0 == strcmp (boolstring, "true")))
filter_flags |= GNUNET_GNSRECORD_FILTER_INCLUDE_MAINTENANCE;
}
labelname = &egoname[strlen (ego_entry->identifier)];
if (1 >= strlen (labelname))
{
/* Iterate over all records */
handle->list_it =
GNUNET_NAMESTORE_zone_iteration_start2 (ns_handle,
handle->zone_pkey,
&namestore_iteration_error,
handle,
&namestore_list_iteration,
handle,
&namestore_list_finished,
handle,
filter_flags);
if (NULL == handle->list_it)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
return;
}
handle->record_name = GNUNET_strdup (labelname + 1);
handle->ns_qe = GNUNET_NAMESTORE_records_lookup2 (ns_handle,
handle->zone_pkey,
handle->record_name,
&ns_lookup_error_cb,
handle,
&ns_get_lookup_cb,
handle,
filter_flags);
if (NULL == handle->ns_qe)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
static void
ns_lookup_cb (void *cls,
const struct GNUNET_IDENTITY_PrivateKey *zone,
const char *label,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
struct GNUNET_GNSRECORD_Data rd_new[rd_count + handle->rd_count];
int i = 0;
int j = 0;
if (UPDATE_STRATEGY_APPEND == handle->update_strategy)
{
for (i = 0; i < rd_count; i++)
rd_new[i] = rd[i];
}
for (j = 0; j < handle->rd_count; j++)
rd_new[i + j] = handle->rd[j];
handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
handle->zone_pkey,
handle->record_name,
i + j,
rd_new,
&create_finished,
handle);
if (NULL == handle->ns_qe)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
static void
bulk_tx_commit_cb (void *cls, enum GNUNET_ErrorCode ec)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->ns_qe = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Commit finished (%d)\n", ec);
handle->ec = ec;
if (GNUNET_EC_NONE != ec)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
static void
import_next_cb (void *cls, enum GNUNET_ErrorCode ec)
{
struct RequestHandle *handle = cls;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Import finished (%d)\n", ec);
handle->ns_qe = NULL;
handle->ec = ec;
if (GNUNET_EC_NONE != ec)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
unsigned int remaining = handle->rd_set_count - handle->rd_set_pos;
if (0 == remaining)
{
handle->ns_qe = GNUNET_NAMESTORE_transaction_commit (handle->nc,
&bulk_tx_commit_cb,
handle);
return;
}
unsigned int sent_rds = 0;
// Find the smallest set of records we can send with our message size
// restriction of 16 bit
handle->ns_qe = GNUNET_NAMESTORE_records_store2 (handle->nc,
handle->zone_pkey,
remaining,
&handle->ri[handle->
rd_set_pos],
&sent_rds,
&import_next_cb,
handle);
if ((NULL == handle->ns_qe) && (0 == sent_rds))
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->rd_set_pos += sent_rds;
}
static void
bulk_tx_start (void *cls, enum GNUNET_ErrorCode ec)
{
struct RequestHandle *handle = cls;
json_t *data_js;
json_error_t err;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transaction started...\n");
handle->ec = ec;
if (GNUNET_EC_NONE != ec)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (0 >= handle->rest_handle->data_size)
{
handle->ec = GNUNET_EC_NAMESTORE_NO_RECORDS_GIVEN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
char term_data[handle->rest_handle->data_size + 1];
term_data[handle->rest_handle->data_size] = '\0';
GNUNET_memcpy (term_data,
handle->rest_handle->data,
handle->rest_handle->data_size);
data_js = json_loads (term_data, JSON_DECODE_ANY, &err);
if (NULL == data_js)
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_DATA_INVALID;
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Error parsing data: %s", err.text);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (! json_is_array (data_js))
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_DATA_INVALID;
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
handle->rd_set_count = json_array_size (data_js);
handle->ri = GNUNET_malloc (handle->rd_set_count
* sizeof (struct GNUNET_NAMESTORE_RecordInfo));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Got record set of size %d\n", handle->rd_set_count);
char *albl;
size_t index;
json_t *value;
json_array_foreach (data_js, index, value) {
{
struct GNUNET_GNSRECORD_Data *rd;
struct GNUNET_JSON_Specification gnsspec[] =
{ GNUNET_GNSRECORD_JSON_spec_gnsrecord (&rd,
&handle->ri[index].a_rd_count,
&albl),
GNUNET_JSON_spec_end () };
if (GNUNET_OK != GNUNET_JSON_parse (value, gnsspec, NULL, NULL))
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_DATA_INVALID;
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
handle->ri[index].a_rd = rd;
handle->ri[index].a_label = albl;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Parsed record set for name %s\n",
handle->ri[index].a_label);
}
}
// json_decref (data_js);
unsigned int sent_rds = 0;
// Find the smallest set of records we can send with our message size
// restriction of 16 bit
handle->ns_qe = GNUNET_NAMESTORE_records_store2 (handle->nc,
handle->zone_pkey,
handle->rd_set_count,
handle->ri,
&sent_rds,
&import_next_cb,
handle);
if ((NULL == handle->ns_qe) && (0 == sent_rds))
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->rd_set_pos += sent_rds;
}
/**
* Handle namestore POST import
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_import (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *egoname;
// set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE_IMPORT) + 1 >= strlen (
handle->url))
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
ego_entry = NULL;
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE_IMPORT) + 1];
ego_entry = get_egoentry_namestore (handle, egoname);
if (NULL == ego_entry)
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
// We need a per-client connection for a transactional bulk import
handle->nc = GNUNET_NAMESTORE_connect (cfg);
if (NULL == handle->nc)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->ns_qe = GNUNET_NAMESTORE_transaction_begin (handle->nc,
&bulk_tx_start,
handle);
}
/**
* Handle namestore POST/PUT request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_add_or_update (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *egoname;
json_t *data_js;
json_error_t err;
char term_data[handle->rest_handle->data_size + 1];
if (0 >= handle->rest_handle->data_size)
{
handle->ec = GNUNET_EC_NAMESTORE_NO_RECORDS_GIVEN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
term_data[handle->rest_handle->data_size] = '\0';
GNUNET_memcpy (term_data,
handle->rest_handle->data,
handle->rest_handle->data_size);
data_js = json_loads (term_data, JSON_DECODE_ANY, &err);
struct GNUNET_JSON_Specification gnsspec[] =
{ GNUNET_GNSRECORD_JSON_spec_gnsrecord (&handle->rd, &handle->rd_count,
&handle->record_name),
GNUNET_JSON_spec_end () };
if (GNUNET_OK != GNUNET_JSON_parse (data_js, gnsspec, NULL, NULL))
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_DATA_INVALID;
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
GNUNET_JSON_parse_free (gnsspec);
if (0 >= strlen (handle->record_name))
{
handle->ec = GNUNET_EC_NAMESTORE_RECORD_DATA_INVALID;
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
json_decref (data_js);
egoname = NULL;
ego_entry = NULL;
// set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) + 1 >= strlen (handle->url))
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE) + 1];
ego_entry = get_egoentry_namestore (handle, egoname);
if (NULL == ego_entry)
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
handle->ns_qe = GNUNET_NAMESTORE_records_lookup (ns_handle,
handle->zone_pkey,
handle->record_name,
&ns_lookup_error_cb,
handle,
&ns_lookup_cb,
handle);
if (NULL == handle->ns_qe)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Handle namestore PUT request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_update (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
handle->update_strategy = UPDATE_STRATEGY_REPLACE;
namestore_add_or_update (con_handle, url, cls);
}
/**
* Handle namestore POST request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_add (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
handle->update_strategy = UPDATE_STRATEGY_APPEND;
namestore_add_or_update (con_handle, url, cls);
}
/**
* Handle namestore DELETE request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_delete (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *egoname;
char *labelname;
egoname = NULL;
ego_entry = NULL;
// set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) + 1 >= strlen (handle->url))
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE) + 1];
ego_entry = get_egoentry_namestore (handle, egoname);
if (NULL == ego_entry)
{
handle->ec = GNUNET_EC_NAMESTORE_ZONE_NOT_FOUND;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
labelname = &egoname[strlen (ego_entry->identifier)];
// set zone to name if given
if (1 >= strlen (labelname))
{
/* label is only "/" */
handle->ec = GNUNET_EC_NAMESTORE_NO_LABEL_GIVEN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
}
handle->record_name = GNUNET_strdup (labelname + 1);
handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
handle->zone_pkey,
handle->record_name,
0,
NULL,
&del_finished,
handle);
if (NULL == handle->ns_qe)
{
handle->ec = GNUNET_EC_NAMESTORE_UNKNOWN;
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Respond to OPTIONS request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
static void
options_cont (struct GNUNET_REST_RequestHandle *con_handle,
const char *url,
void *cls)
{
struct MHD_Response *resp;
struct RequestHandle *handle = cls;
// independent of path return all options
resp = GNUNET_REST_create_response (NULL);
GNUNET_assert (MHD_YES ==
MHD_add_response_header (resp,
"Access-Control-Allow-Methods",
allow_methods));
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
return;
}
static void
list_ego (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *identifier)
{
struct EgoEntry *ego_entry;
struct GNUNET_IDENTITY_PublicKey pk;
if ((NULL == ego) && (ID_REST_STATE_INIT == state))
{
state = ID_REST_STATE_POST_INIT;
return;
}
if (NULL == ego)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Called with NULL ego\n");
return;
}
if (ID_REST_STATE_INIT == state)
{
ego_entry = GNUNET_new (struct EgoEntry);
GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
ego_entry->keystring = GNUNET_IDENTITY_public_key_to_string (&pk);
ego_entry->ego = ego;
ego_entry->identifier = GNUNET_strdup (identifier);
GNUNET_CONTAINER_DLL_insert_tail (ego_head,
ego_tail,
ego_entry);
}
/* Ego renamed or added */
if (identifier != NULL)
{
for (ego_entry = ego_head; NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (ego_entry->ego == ego)
{
/* Rename */
GNUNET_free (ego_entry->identifier);
ego_entry->identifier = GNUNET_strdup (identifier);
break;
}
}
if (NULL == ego_entry)
{
/* Add */
ego_entry = GNUNET_new (struct EgoEntry);
GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
ego_entry->keystring = GNUNET_IDENTITY_public_key_to_string (&pk);
ego_entry->ego = ego;
ego_entry->identifier = GNUNET_strdup (identifier);
GNUNET_CONTAINER_DLL_insert_tail (ego_head,
ego_tail,
ego_entry);
}
}
else
{
/* Delete */
for (ego_entry = ego_head; NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (ego_entry->ego == ego)
break;
}
if (NULL == ego_entry)
return; /* Not found */
GNUNET_CONTAINER_DLL_remove (ego_head,
ego_tail,
ego_entry);
GNUNET_free (ego_entry->identifier);
GNUNET_free (ego_entry->keystring);
GNUNET_free (ego_entry);
return;
}
}
/**
* Function processing the REST call
*
* @param method HTTP method
* @param url URL of the HTTP request
* @param data body of the HTTP request (optional)
* @param data_size length of the body
* @param proc callback function for the result
* @param proc_cls closure for callback function
* @return GNUNET_OK if request accepted
*/
static enum GNUNET_GenericReturnValue
rest_process_request (struct GNUNET_REST_RequestHandle *rest_handle,
GNUNET_REST_ResultProcessor proc,
void *proc_cls)
{
struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
struct GNUNET_REST_RequestHandlerError err;
static const struct GNUNET_REST_RequestHandler handlers[] =
{ { MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_NAMESTORE, &namestore_get },
{ MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_NAMESTORE_IMPORT,
&namestore_import },
{ MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_NAMESTORE, &namestore_add },
{ MHD_HTTP_METHOD_PUT, GNUNET_REST_API_NS_NAMESTORE, &namestore_update },
{ MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_NAMESTORE,
&namestore_delete },
{ MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_NAMESTORE, &options_cont },
GNUNET_REST_HANDLER_END };
handle->ec = GNUNET_EC_NONE;
handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
handle->proc_cls = proc_cls;
handle->proc = proc;
handle->rest_handle = rest_handle;
handle->zone_pkey = NULL;
handle->timeout_task =
GNUNET_SCHEDULER_add_delayed (handle->timeout, &do_error, handle);
handle->url = GNUNET_strdup (rest_handle->url);
if (handle->url[strlen (handle->url) - 1] == '/')
handle->url[strlen (handle->url) - 1] = '\0';
GNUNET_CONTAINER_DLL_insert (requests_head,
requests_tail,
handle);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connecting...\n");
if (GNUNET_NO ==
GNUNET_REST_handle_request (handle->rest_handle, handlers, &err,
handle))
{
cleanup_handle (handle);
return GNUNET_NO;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connected\n");
return GNUNET_YES;
}
/**
* Entry point for the plugin.
*
* @param cls Config info
* @return NULL on error, otherwise the plugin context
*/
void *
libgnunet_plugin_rest_namestore_init (void *cls)
{
static struct Plugin plugin;
struct GNUNET_REST_Plugin *api;
cfg = cls;
if (NULL != plugin.cfg)
return NULL; /* can only initialize once! */
memset (&plugin, 0, sizeof(struct Plugin));
plugin.cfg = cfg;
api = GNUNET_new (struct GNUNET_REST_Plugin);
api->cls = &plugin;
api->name = GNUNET_REST_API_NS_NAMESTORE;
api->process_request = &rest_process_request;
state = ID_REST_STATE_INIT;
GNUNET_asprintf (&allow_methods,
"%s, %s, %s, %s, %s",
MHD_HTTP_METHOD_GET,
MHD_HTTP_METHOD_POST,
MHD_HTTP_METHOD_PUT,
MHD_HTTP_METHOD_DELETE,
MHD_HTTP_METHOD_OPTIONS);
ns_handle = GNUNET_NAMESTORE_connect (cfg);
identity_handle = GNUNET_IDENTITY_connect (cfg, &list_ego, NULL);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _ (
"Namestore REST API initialized\n"));
return api;
}
/**
* Exit point from the plugin.
*
* @param cls the plugin context (as returned by "init")
* @return always NULL
*/
void *
libgnunet_plugin_rest_namestore_done (void *cls)
{
struct GNUNET_REST_Plugin *api = cls;
struct Plugin *plugin = api->cls;
struct RequestHandle *request;
struct EgoEntry *ego_entry;
struct EgoEntry *ego_tmp;
plugin->cfg = NULL;
while (NULL != (request = requests_head))
do_error (request);
if (NULL != identity_handle)
GNUNET_IDENTITY_disconnect (identity_handle);
if (NULL != ns_handle)
GNUNET_NAMESTORE_disconnect (ns_handle);
for (ego_entry = ego_head; NULL != ego_entry;)
{
ego_tmp = ego_entry;
ego_entry = ego_entry->next;
GNUNET_free (ego_tmp->identifier);
GNUNET_free (ego_tmp->keystring);
GNUNET_free (ego_tmp);
}
GNUNET_free (allow_methods);
GNUNET_free (api);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Namestore REST plugin is finished\n");
return NULL;
}
/* end of plugin_rest_namestore.c */