/*
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 .
*/
/**
* @author Martin Schanzenbach
* @file namestore/plugin_rest_namestore.c
* @brief GNUnet Namestore REST plugin
*
*/
#include "platform.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_jsonapi_lib.h"
#include "gnunet_jsonapi_util.h"
#include "microhttpd.h"
#include
#define GNUNET_REST_API_NS_NAMESTORE "/names"
#define GNUNET_REST_API_NS_NAMESTORE_ZKEY "/names/zkey"
#define GNUNET_REST_JSONAPI_NAMESTORE_TYPEINFO "record"
#define GNUNET_REST_JSONAPI_NAMESTORE_NAME "name"
#define GNUNET_REST_JSONAPI_NAMESTORE_REVINFO "revinfo"
#define GNUNET_REST_JSONAPI_NAMESTORE_RECORD GNUNET_REST_JSONAPI_NAMESTORE_TYPEINFO
#define GNUNET_REST_JSONAPI_NAMESTORE_RECORD_TYPE "record_type"
#define GNUNET_REST_JSONAPI_NAMESTORE_VALUE "value"
#define GNUNET_REST_JSONAPI_NAMESTORE_PUBLIC "public"
#define GNUNET_REST_JSONAPI_NAMESTORE_SHADOW "shadow"
#define GNUNET_REST_JSONAPI_NAMESTORE_PKEY "pkey"
#define GNUNET_REST_JSONAPI_NAMESTORE_ZKEY "zkey"
#define GNUNET_REST_JSONAPI_NAMESTORE_EXPIRATION "expiration"
#define GNUNET_REST_JSONAPI_NAMESTORE_EGO "ego"
/**
* @brief struct returned by the initialization function of the plugin
*/
struct Plugin
{
const struct GNUNET_CONFIGURATION_Handle *cfg;
};
/**
* HTTP methods allows for this plugin
*/
static char* allow_methods;
const struct GNUNET_CONFIGURATION_Handle *cfg;
struct RecordEntry
{
/**
* DLL
*/
struct RecordEntry *next;
/**
* DLL
*/
struct RecordEntry *prev;
};
struct RequestHandle
{
/**
* Ego list
*/
struct RecordEntry *record_head;
/**
* Ego list
*/
struct record_entry *record_tail;
/**
* JSON response object
*/
struct GNUNET_JSONAPI_Document *resp_object;
/**
* Rest connection
*/
struct GNUNET_REST_RequestHandle *rest_handle;
/**
* Handle to GNS service.
*/
struct GNUNET_IDENTITY_Handle *identity_handle;
/**
* Handle to NAMESTORE
*/
struct GNUNET_NAMESTORE_Handle *ns_handle;
/**
* Handle to NAMESTORE it
*/
struct GNUNET_NAMESTORE_ZoneIterator *list_it;
/**
* Private key for the zone
*/
struct GNUNET_CRYPTO_EcdsaPrivateKey zone_pkey;
/**
* Handle to identity lookup
*/
struct GNUNET_IDENTITY_EgoLookup *ego_lookup;
/**
* Default Ego operation
*/
struct GNUNET_IDENTITY_Operation *get_default;
/**
* Name of the ego
*/
char *ego_name;
/**
* Record is public
*/
int is_public;
/**
* Shadow record
*/
int is_shadow;
/**
* Name of the record to modify
*/
char *name;
/**
* Value of the record
*/
char *value;
/**
* Zkey string
*/
const char* zkey_str;
/**
* record type
*/
uint32_t type;
/**
* Records to store
*/
struct GNUNET_GNSRECORD_Data *rd;
/**
* record count
*/
unsigned int rd_count;
/**
* NAMESTORE Operation
*/
struct GNUNET_NAMESTORE_QueueEntry *add_qe;
/**
* NAMESTORE Operation
*/
struct GNUNET_NAMESTORE_QueueEntry *reverse_qe;
/**
* 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;
/**
* Cfg
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* HTTP response code
*/
int response_code;
};
/**
* Cleanup lookup handle
*
* @param handle Handle to clean up
*/
static void
cleanup_handle (struct RequestHandle *handle)
{
struct RecordEntry *record_entry;
struct RecordEntry *record_tmp;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Cleaning up\n");
if (NULL != handle->resp_object)
GNUNET_JSONAPI_document_delete (handle->resp_object);
if (NULL != handle->name)
GNUNET_free (handle->name);
if (NULL != handle->timeout_task)
GNUNET_SCHEDULER_cancel (handle->timeout_task);
if (NULL != handle->ego_lookup)
GNUNET_IDENTITY_ego_lookup_cancel (handle->ego_lookup);
if (NULL != handle->get_default)
GNUNET_IDENTITY_cancel (handle->get_default);
if (NULL != handle->list_it)
GNUNET_NAMESTORE_zone_iteration_stop (handle->list_it);
if (NULL != handle->add_qe)
GNUNET_NAMESTORE_cancel (handle->add_qe);
if (NULL != handle->identity_handle)
GNUNET_IDENTITY_disconnect (handle->identity_handle);
if (NULL != handle->ns_handle)
GNUNET_NAMESTORE_disconnect (handle->ns_handle);
if (NULL != handle->url)
GNUNET_free (handle->url);
if (NULL != handle->value)
GNUNET_free (handle->value);
if (NULL != handle->rd)
{
for (unsigned int i = 0; i < handle->rd_count; i++)
{
if (NULL != handle->rd[i].data)
GNUNET_free ((void*)handle->rd[i].data);
}
GNUNET_free (handle->rd);
}
if (NULL != handle->ego_name)
GNUNET_free (handle->ego_name);
for (record_entry = handle->record_head;
NULL != record_entry;)
{
record_tmp = record_entry;
record_entry = record_entry->next;
GNUNET_free (record_tmp);
}
GNUNET_free (handle);
}
/**
* Create json representation of a GNSRECORD
*
* @param rd the GNSRECORD_Data
*/
static json_t *
gnsrecord_to_json (const struct GNUNET_GNSRECORD_Data *rd)
{
const char *typename;
char *string_val;
const char *exp_str;
json_t *record_obj;
typename = GNUNET_GNSRECORD_number_to_typename (rd->record_type);
string_val = GNUNET_GNSRECORD_value_to_string (rd->record_type,
rd->data,
rd->data_size);
if (NULL == string_val)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Record of type %d malformed, skipping\n",
(int) rd->record_type);
return NULL;
}
record_obj = json_object();
json_object_set_new (record_obj,
GNUNET_REST_JSONAPI_NAMESTORE_RECORD_TYPE,
json_string (typename));
json_object_set_new (record_obj,
GNUNET_REST_JSONAPI_NAMESTORE_VALUE,
json_string (string_val));
GNUNET_free (string_val);
if (GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION & rd->flags)
{
struct GNUNET_TIME_Relative time_rel;
time_rel.rel_value_us = rd->expiration_time;
exp_str = GNUNET_STRINGS_relative_time_to_string (time_rel, 1);
}
else
{
struct GNUNET_TIME_Absolute time_abs;
time_abs.abs_value_us = rd->expiration_time;
exp_str = GNUNET_STRINGS_absolute_time_to_string (time_abs);
}
json_object_set_new (record_obj, GNUNET_REST_JSONAPI_NAMESTORE_EXPIRATION, json_string (exp_str));
json_object_set_new (record_obj, "expired",
json_boolean (GNUNET_YES == GNUNET_GNSRECORD_is_expired (rd)));
return record_obj;
}
/**
* Task run on error. Generates error response and cleans up.
*
* @param cls the request to generate an error response for
*/
static void
do_error (void *cls)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, handle->response_code);
cleanup_handle (handle);
}
/**
* Task run on timeout.
*
* @param cls the request to time out
*/
static void
do_timeout (void *cls)
{
struct RequestHandle *handle = cls;
handle->timeout_task = NULL;
do_error (handle);
}
static void
cleanup_handle_delayed (void *cls)
{
cleanup_handle (cls);
}
/**
* 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;
struct MHD_Response *resp;
handle->list_it = NULL;
if (NULL == handle->resp_object)
handle->resp_object = GNUNET_JSONAPI_document_new ();
if (GNUNET_SYSERR ==
GNUNET_JSONAPI_document_serialize (handle->resp_object,
&result))
{
handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
GNUNET_SCHEDULER_add_now (&do_error,
handle);
return;
}
resp = GNUNET_REST_create_response (result);
handle->proc (handle->proc_cls,
resp,
MHD_HTTP_OK);
GNUNET_free_non_null (result);
GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed,
handle);
}
/**
* Create a response with requested records
*
* @param handle the RequestHandle
*/
static void
namestore_list_response (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
const char *rname,
unsigned int rd_len,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
struct GNUNET_JSONAPI_Resource *json_resource;
json_t *result_array;
json_t *record_obj;
if (NULL == handle->resp_object)
handle->resp_object = GNUNET_JSONAPI_document_new ();
if ( (NULL != handle->name) &&
(0 != strcmp (handle->name,
rname)) )
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"%s does not match %s\n",
rname,
handle->name);
GNUNET_NAMESTORE_zone_iterator_next (handle->list_it,
1);
return;
}
result_array = json_array ();
for (unsigned int i=0; itype) &&
(GNUNET_GNSRECORD_TYPE_ANY != handle->type) )
continue;
record_obj = gnsrecord_to_json (&rd[i]);
json_array_append (result_array,
record_obj);
json_decref (record_obj);
}
if (0 < json_array_size(result_array))
{
json_resource = GNUNET_JSONAPI_resource_new (GNUNET_REST_JSONAPI_NAMESTORE_TYPEINFO,
rname);
GNUNET_JSONAPI_resource_add_attr (json_resource,
GNUNET_REST_JSONAPI_NAMESTORE_RECORD,
result_array);
GNUNET_JSONAPI_document_resource_add (handle->resp_object, json_resource);
}
json_decref (result_array);
GNUNET_NAMESTORE_zone_iterator_next (handle->list_it,
1);
}
static void
create_finished (void *cls, int32_t success, const char *emsg)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->add_qe = NULL;
if (GNUNET_YES != success)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Error storing records%s%s\n",
(NULL == emsg) ? "" : ": ",
(NULL == emsg) ? "" : emsg);
GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
return;
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
}
/**
* We're storing a new record; this requires
* that no record already exists
*
* @param cls closure, unused
* @param zone_key private key of the zone
* @param rec_name name that is being mapped (at most 255 characters long)
* @param rd_count number of entries in @a rd array
* @param rd array of records with data to store
*/
static void
create_new_record_cont (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
const char *rec_name,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
handle->add_qe = NULL;
if (0 != strcmp (rec_name, handle->name))
{
GNUNET_break (0);
do_error (handle);
return;
}
if (0 != rd_count)
{
handle->proc (handle->proc_cls,
GNUNET_REST_create_response (NULL),
MHD_HTTP_CONFLICT);
GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
return;
}
GNUNET_assert (NULL != handle->name);
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
&handle->zone_pkey,
handle->name,
handle->rd_count,
handle->rd,
&create_finished,
handle);
}
static void
del_finished (void *cls,
int32_t success,
const char *emsg)
{
struct RequestHandle *handle = cls;
handle->add_qe = NULL;
if (GNUNET_NO == success)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Deleting record failed, record does not exist%s%s\n"),
(NULL != emsg) ? ": " : "",
(NULL != emsg) ? emsg : "");
GNUNET_SCHEDULER_add_now (&do_error, handle); //do_not_found TODO
return;
}
if (GNUNET_SYSERR == success)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Deleting record failed%s%s\n"),
(NULL != emsg) ? ": " : "",
(NULL != emsg) ? emsg : "");
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_delayed, handle);
}
static void
del_cont (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
const char *label,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
handle->add_qe = NULL;
if (0 == rd_count)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("There are no records under label `%s' that could be deleted.\n"),
label);
do_error (handle);
return;
}
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
&handle->zone_pkey,
handle->name,
0, NULL,
&del_finished,
handle);
}
static void
namestore_delete_cont (struct GNUNET_REST_RequestHandle *con,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
if (NULL == handle->name)
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->add_qe = GNUNET_NAMESTORE_records_lookup (handle->ns_handle,
&handle->zone_pkey,
handle->name,
&do_error,
handle,
&del_cont,
handle);
}
static int
json_to_gnsrecord (const json_t *records_json,
struct GNUNET_GNSRECORD_Data **rd,
unsigned int *rd_count)
{
struct GNUNET_TIME_Relative etime_rel;
struct GNUNET_TIME_Absolute etime_abs;
char *value;
void *rdata;
size_t rdata_size;
const char *typestring;
const char *expirationstring;
json_t *type_json;
json_t *value_json;
json_t *record_json;
json_t *exp_json;
*rd_count = json_array_size (records_json);
*rd = GNUNET_new_array (*rd_count,
struct GNUNET_GNSRECORD_Data);
for (unsigned int i = 0; i < *rd_count; i++)
{
memset (&(*rd)[i],
0,
sizeof (struct GNUNET_GNSRECORD_Data));
record_json = json_array_get (records_json,
i);
type_json = json_object_get (record_json,
GNUNET_REST_JSONAPI_NAMESTORE_RECORD_TYPE);
if (! json_is_string (type_json))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Type property is no string\n");
return GNUNET_SYSERR;
}
typestring = json_string_value (type_json);
(*rd)[i].record_type = GNUNET_GNSRECORD_typename_to_number (typestring);
if (UINT32_MAX == (*rd)[i].record_type)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Unsupported type `%s'\n"),
json_string_value (type_json));
return GNUNET_SYSERR;
}
value_json = json_object_get (record_json,
GNUNET_REST_JSONAPI_NAMESTORE_VALUE);
if (! json_is_string (value_json))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Value property is no string\n");
return GNUNET_SYSERR;
}
value = GNUNET_strdup (json_string_value (value_json));
if (GNUNET_OK !=
GNUNET_GNSRECORD_string_to_value ((*rd)[i].record_type,
value,
&rdata,
&rdata_size))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Value `%s' invalid for record type `%s'\n"),
value,
typestring);
return GNUNET_SYSERR;
}
(*rd)[i].data = rdata;
(*rd)[i].data_size = rdata_size;
/**TODO
* if (1 == handle->is_shadow)
rde->flags |= GNUNET_GNSRECORD_RF_SHADOW_RECORD;
if (1 != handle->is_public)
rde->flags |= GNUNET_GNSRECORD_RF_PRIVATE;
*/
exp_json = json_object_get (record_json,
GNUNET_REST_JSONAPI_NAMESTORE_EXPIRATION);
if (! json_is_string (exp_json))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Expiration property is no string\n");
return GNUNET_SYSERR;
}
expirationstring = json_string_value (exp_json);
if (0 == strcmp (expirationstring, "never"))
{
(*rd)[i].expiration_time = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us;
}
else if (GNUNET_OK ==
GNUNET_STRINGS_fancy_time_to_relative (expirationstring,
&etime_rel))
{
(*rd)[i].expiration_time = etime_rel.rel_value_us;
(*rd)[i].flags |= GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION;
}
else if (GNUNET_OK ==
GNUNET_STRINGS_fancy_time_to_absolute (expirationstring,
&etime_abs))
{
(*rd)[i].expiration_time = etime_abs.abs_value_us;
}
else
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Value `%s' invalid for record type `%s'\n"),
value,
typestring);
return GNUNET_SYSERR;
}
}
return GNUNET_OK;
}
static void
namestore_create_cont (struct GNUNET_REST_RequestHandle *con,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
struct GNUNET_JSONAPI_Document *json_obj;
struct GNUNET_JSONAPI_Resource *json_res;
json_t *records_json;
json_t *data_js;
json_error_t err;
char term_data[handle->rest_handle->data_size+1];
struct GNUNET_JSON_Specification docspec[] = {
GNUNET_JSON_spec_jsonapi_document (&json_obj),
GNUNET_JSON_spec_end()
};
if (strlen (GNUNET_REST_API_NS_NAMESTORE) != strlen (handle->url))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Cannot create under %s\n", handle->url);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (0 >= handle->rest_handle->data_size)
{
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);
GNUNET_assert (GNUNET_OK ==
GNUNET_JSON_parse (data_js, docspec,
NULL, NULL));
json_decref (data_js);
if (NULL == json_obj)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unable to parse JSONAPI Object from %s\n",
term_data);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (1 != GNUNET_JSONAPI_document_resource_count (json_obj))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Cannot create more than 1 resource! (Got %d)\n",
GNUNET_JSONAPI_document_resource_count (json_obj));
GNUNET_JSONAPI_document_delete (json_obj);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
json_res = GNUNET_JSONAPI_document_get_resource (json_obj, 0);
if (GNUNET_NO == GNUNET_JSONAPI_resource_check_type (json_res,
GNUNET_REST_JSONAPI_NAMESTORE_RECORD))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unsupported JSON data type\n");
GNUNET_JSONAPI_document_delete (json_obj);
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_CONFLICT);
cleanup_handle (handle);
return;
}
handle->name = GNUNET_strdup (GNUNET_JSONAPI_resource_get_id (json_res));
records_json = GNUNET_JSONAPI_resource_read_attr (json_res,
GNUNET_REST_JSONAPI_NAMESTORE_RECORD);
if (NULL == records_json)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"No records given\n");
GNUNET_JSONAPI_document_delete (json_obj);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (GNUNET_SYSERR == json_to_gnsrecord (records_json, &handle->rd, &handle->rd_count))
{
GNUNET_JSONAPI_document_delete (json_obj);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
GNUNET_JSONAPI_document_delete (json_obj);
handle->add_qe = GNUNET_NAMESTORE_records_lookup (handle->ns_handle,
&handle->zone_pkey,
handle->name,
&do_error,
handle,
&create_new_record_cont,
handle);
}
static void
namestore_zkey_response (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
const char *label,
unsigned int rd_count,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
struct GNUNET_JSONAPI_Document *json_obj;
struct GNUNET_JSONAPI_Resource *json_res;
json_t *name_json;
char* result;
handle->reverse_qe = NULL;
json_obj = GNUNET_JSONAPI_document_new ();
if (NULL != label)
{
name_json = json_string (label);
json_res = GNUNET_JSONAPI_resource_new (GNUNET_REST_JSONAPI_NAMESTORE_REVINFO,
handle->zkey_str);
GNUNET_JSONAPI_resource_add_attr (json_res,
GNUNET_REST_JSONAPI_NAMESTORE_NAME,
name_json);
GNUNET_JSONAPI_document_resource_add (json_obj, json_res);
json_decref (name_json);
}
//Handle response
if (GNUNET_SYSERR == GNUNET_JSONAPI_document_serialize (json_obj, &result))
{
GNUNET_JSONAPI_document_delete (json_obj);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
resp = GNUNET_REST_create_response (result);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_JSONAPI_document_delete (json_obj);
GNUNET_free (result);
GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
}
static void
namestore_zkey_cont (struct GNUNET_REST_RequestHandle *con,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
struct GNUNET_HashCode key;
struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_NAMESTORE_ZKEY,
strlen (GNUNET_REST_JSONAPI_NAMESTORE_ZKEY),
&key);
if ( GNUNET_NO ==
GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
&key) )
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"No zkey given %s\n", handle->url);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zkey_str = GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map,
&key);
if ((NULL == handle->zkey_str) ||
(GNUNET_OK !=
GNUNET_CRYPTO_ecdsa_public_key_from_string (handle->zkey_str,
strlen (handle->zkey_str),
&pubkey)))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Zkey invalid %s\n", handle->zkey_str);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->reverse_qe = GNUNET_NAMESTORE_zone_to_name (handle->ns_handle,
&handle->zone_pkey,
&pubkey,
&do_error,
handle,
&namestore_zkey_response,
handle);
}
static void
namestore_info_cont (struct GNUNET_REST_RequestHandle *con,
const char *url,
void *cls)
{
struct RequestHandle *handle = cls;
handle->list_it = GNUNET_NAMESTORE_zone_iteration_start (handle->ns_handle,
&handle->zone_pkey,
&do_error,
handle,
&namestore_list_response,
handle,
&namestore_list_finished,
handle);
}
static char*
get_name_from_url (const char* url)
{
if (strlen (url) <= strlen (GNUNET_REST_API_NS_NAMESTORE))
return NULL;
return (char*)url + strlen (GNUNET_REST_API_NS_NAMESTORE) + 1;
}
/**
* 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;
//For now, independent of path return all options
resp = GNUNET_REST_create_response (NULL);
MHD_add_response_header (resp,
"Access-Control-Allow-Methods",
allow_methods);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
cleanup_handle (handle);
}
/**
* Callback invoked from identity service with ego information.
* An @a ego of NULL means the ego was not found.
*
* @param cls closure with the configuration
* @param ego an ego known to identity service, or NULL
*/
static void
identity_cb (void *cls,
const struct GNUNET_IDENTITY_Ego *ego)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
struct GNUNET_REST_RequestHandlerError err;
static const struct GNUNET_REST_RequestHandler handlers[] = {
{MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_NAMESTORE_ZKEY, &namestore_zkey_cont}, //reverse
{MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_NAMESTORE, &namestore_info_cont}, //list
{MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_NAMESTORE, &namestore_create_cont}, //create
// {MHD_HTTP_METHOD_PUT, GNUNET_REST_API_NS_NAMESTORE, &namestore_edit_cont}, //update. TODO this shoul be PATCH
{MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_NAMESTORE, &namestore_delete_cont}, //delete
{MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_NAMESTORE, &options_cont},
GNUNET_REST_HANDLER_END
};
handle->ego_lookup = NULL;
if (NULL == ego)
{
if (NULL != handle->ego_name)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Ego `%s' not known to identity service\n"),
handle->ego_name);
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NOT_FOUND);
cleanup_handle (handle);
return;
}
handle->zone_pkey = *GNUNET_IDENTITY_ego_get_private_key (ego);
handle->ns_handle = GNUNET_NAMESTORE_connect (cfg);
if (NULL == handle->ns_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Failed to connect to namestore\n"));
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (GNUNET_OK !=
GNUNET_JSONAPI_handle_request (handle->rest_handle,
handlers,
&err,
handle))
{
handle->response_code = err.error_code;
GNUNET_SCHEDULER_add_now (&do_error,
(void *) handle);
}
}
static void
default_ego_cb (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *name)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->get_default = NULL;
if (NULL == ego)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("No default ego configured in identity service\n"));
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NOT_FOUND);
cleanup_handle (handle);
return;
}
else
{
identity_cb (cls, ego);
}
}
static void
id_connect_cb (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *name)
{
struct RequestHandle *handle = cls;
if (NULL == ego)
{
handle->get_default = GNUNET_IDENTITY_get (handle->identity_handle,
"namestore",
&default_ego_cb, handle);
}
}
/**
* 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 void
rest_identity_process_request(struct GNUNET_REST_RequestHandle *rest_handle,
GNUNET_REST_ResultProcessor proc,
void *proc_cls)
{
struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
struct MHD_Response *resp;
struct GNUNET_HashCode key;
char *ego;
char *name;
char *type;
handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
handle->proc_cls = proc_cls;
handle->proc = proc;
handle->rest_handle = rest_handle;
handle->url = GNUNET_strdup (rest_handle->url);
if (handle->url[strlen (handle->url)-1] == '/')
handle->url[strlen (handle->url)-1] = '\0';
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Connecting...\n");
handle->cfg = cfg;
ego = NULL;
GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_NAMESTORE_EGO,
strlen (GNUNET_REST_JSONAPI_NAMESTORE_EGO),
&key);
if ( GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
&key) )
{
ego = GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map,
&key);
}
handle->type = GNUNET_GNSRECORD_TYPE_ANY;
GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_NAMESTORE_RECORD_TYPE,
strlen (GNUNET_REST_JSONAPI_NAMESTORE_RECORD_TYPE),
&key);
if ( GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
&key) )
{
type = GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map,
&key);
if (NULL != type)
handle->type = GNUNET_GNSRECORD_typename_to_number (type);
}
name = get_name_from_url (handle->url);
if (NULL != ego)
handle->ego_name = GNUNET_strdup (ego);
if (NULL != name)
handle->name = GNUNET_strdup (name);
if (NULL == handle->ego_name)
{
handle->identity_handle = GNUNET_IDENTITY_connect (handle->cfg, &id_connect_cb, handle);
if (NULL == handle->identity_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Cannot connect to identity service\n"));
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NOT_FOUND);
cleanup_handle (handle);
}
return;
}
handle->ego_lookup = GNUNET_IDENTITY_ego_lookup (cfg,
handle->ego_name,
&identity_cb,
handle);
handle->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->timeout,
&do_timeout,
handle);
}
/**
* 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;
cfg = cls;
struct GNUNET_REST_Plugin *api;
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_identity_process_request;
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);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("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;
plugin->cfg = NULL;
GNUNET_free (api);
GNUNET_free_non_null (allow_methods);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Namestore REST plugin is finished\n");
return NULL;
}
/* end of plugin_rest_namestore.c */