* Copyright (C) 2015 "IoT.bzh"
* Author "Fulup Ar Foll"
*
- * 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.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * 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/>.
- *
- * Reference:
- * http://stackoverflow.com/questions/25971505/how-to-delete-element-from-hsearch
+ * http://www.apache.org/licenses/LICENSE-2.0
*
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*/
-
-#include "local-def.h"
-#include <dirent.h>
-#include <string.h>
+#define _GNU_SOURCE
+#include <stdio.h>
#include <time.h>
-#include <sys/stat.h>
-#include <sys/types.h>
#include <pthread.h>
-#include <search.h>
+#include <stdlib.h>
+#include <string.h>
+#include <uuid/uuid.h>
+#include <assert.h>
+
+#include "session.h"
+#define NOW (time(NULL))
// Session UUID are store in a simple array [for 10 sessions this should be enough]
static struct {
pthread_mutex_t mutex; // declare a mutex to protect hash table
- AFB_clientCtx **store; // sessions store
+ struct AFB_clientCtx **store; // sessions store
int count; // current number of sessions
int max;
+ int timeout;
+ int apicount;
+ const char *initok;
} sessions;
-static const char key_uuid[] = "uuid";
-static const char key_token[] = "token";
+void *afb_context_get(struct afb_context *actx)
+{
+ return actx->context;
+}
+
+void afb_context_set(struct afb_context *actx, void *context, void (*free_context)(void*))
+{
+fprintf(stderr, "afb_context_set(%p,%p) was (%p,%p)\n",context, free_context, actx->context, actx->free_context);
+ if (actx->context != NULL && actx->free_context != NULL)
+ actx->free_context(actx->context);
+ actx->context = context;
+ actx->free_context = free_context;
+}
// Free context [XXXX Should be protected again memory abort XXXX]
-static void ctxUuidFreeCB (AFB_clientCtx *client)
+static void ctxUuidFreeCB (struct AFB_clientCtx *client)
{
+ int idx;
- AFB_plugin **plugins = client->plugins;
- AFB_freeCtxCB freeCtxCB;
- int idx;
+ // If application add a handle let's free it now
+ assert (client->contexts != NULL);
- // If application add a handle let's free it now
- if (client->contexts != NULL) {
-
- // Free client handle with a standard Free function, with app callback or ignore it
- for (idx=0; client->plugins[idx] != NULL; idx ++) {
- if (client->contexts[idx] != NULL) {
- freeCtxCB = client->plugins[idx]->freeCtxCB;
- if (freeCtxCB == NULL)
- free (client->contexts[idx]);
- else if (freeCtxCB != (void*)-1)
- freeCtxCB(client->contexts[idx], plugins[idx]->handle, client->uuid);
- }
- }
- }
+ // Free client handle with a standard Free function, with app callback or ignore it
+ for (idx=0; idx < sessions.apicount; idx ++)
+ afb_context_set(&client->contexts[idx], NULL, NULL);
}
// Create a new store in RAM, not that is too small it will be automatically extended
-void ctxStoreInit (int nbSession)
+void ctxStoreInit (int max_session_count, int timeout, const char *initok, int context_count)
{
-
- // let's create as store as hashtable does not have any
- sessions.store = calloc (1 + (unsigned)nbSession, sizeof(AFB_clientCtx));
- sessions.max = nbSession;
+ // let's create as store as hashtable does not have any
+ sessions.store = calloc (1 + (unsigned)max_session_count, sizeof(struct AFB_clientCtx));
+ sessions.max = max_session_count;
+ sessions.timeout = timeout;
+ sessions.apicount = context_count;
+ if (strlen(initok) >= 37) {
+ fprintf(stderr, "Error: initial token '%s' too long (max length 36)", initok);
+ exit(1);
+ }
+ sessions.initok = initok;
}
-static AFB_clientCtx *ctxStoreSearch (const char* uuid)
+static struct AFB_clientCtx *ctxStoreSearch (const char* uuid)
{
int idx;
- AFB_clientCtx *client;
+ struct AFB_clientCtx *client;
- if (uuid == NULL)
- return NULL;
+ assert (uuid != NULL);
pthread_mutex_lock(&sessions.mutex);
for (idx=0; idx < sessions.max; idx++) {
- if (sessions.store[idx] && (0 == strcmp (uuid, sessions.store[idx]->uuid))) break;
+ client = sessions.store[idx];
+ if (client && (0 == strcmp (uuid, client->uuid)))
+ goto found;
}
+ client = NULL;
- if (idx == sessions.max) client=NULL;
- else client= sessions.store[idx];
+found:
pthread_mutex_unlock(&sessions.mutex);
-
return client;
}
-static AFB_error ctxStoreDel (AFB_clientCtx *client)
+static int ctxStoreDel (struct AFB_clientCtx *client)
{
int idx;
int status;
- if (client == NULL)
- return AFB_FAIL;
+ assert (client != NULL);
pthread_mutex_lock(&sessions.mutex);
for (idx=0; idx < sessions.max; idx++) {
- if (sessions.store[idx] && (0 == strcmp (client->uuid, sessions.store[idx]->uuid))) break;
- }
-
- if (idx == sessions.max)
- status = AFB_FAIL;
- else {
- sessions.count--;
- ctxUuidFreeCB (sessions.store[idx]);
- sessions.store[idx]=NULL;
- status = AFB_SUCCESS;
+ if (sessions.store[idx] == client) {
+ sessions.store[idx]=NULL;
+ sessions.count--;
+ status = 1;
+ goto deleted;
+ }
}
-
+ status = 0;
+deleted:
pthread_mutex_unlock(&sessions.mutex);
return status;
}
-static AFB_error ctxStoreAdd (AFB_clientCtx *client)
+static int ctxStoreAdd (struct AFB_clientCtx *client)
{
int idx;
int status;
- if (client == NULL)
- return AFB_FAIL;
+
+ assert (client != NULL);
//fprintf (stderr, "ctxStoreAdd request uuid=%s count=%d\n", client->uuid, sessions.count);
pthread_mutex_lock(&sessions.mutex);
for (idx=0; idx < sessions.max; idx++) {
- if (NULL == sessions.store[idx]) break;
- }
-
- if (idx == sessions.max) status=AFB_FAIL;
- else {
- status=AFB_SUCCESS;
- sessions.count ++;
- sessions.store[idx]= client;
+ if (NULL == sessions.store[idx]) {
+ sessions.store[idx]= client;
+ sessions.count++;
+ status = 1;
+ goto added;
+ }
}
-
+ status = 0;
+added:
pthread_mutex_unlock(&sessions.mutex);
return status;
}
// Check if context timeout or not
-static int ctxStoreToOld (AFB_clientCtx *ctx, int timeout)
+static int ctxStoreTooOld (struct AFB_clientCtx *ctx, time_t now)
{
- int res;
- time_t now = time(NULL);
- res = (ctx->timeStamp + timeout) <= now;
- return res;
+ return ctx->expiration <= now;
}
// Loop on every entry and remove old context sessions.hash
-void ctxStoreGarbage (const int timeout)
+static void ctxStoreCleanUp (time_t now)
{
- AFB_clientCtx *ctx;
- long idx;
-
- // Loop on Sessions Table and remove anything that is older than timeout
- for (idx=0; idx < sessions.max; idx++) {
- ctx=sessions.store[idx];
- if ((ctx != NULL) && (ctxStoreToOld(ctx, timeout))) {
- ctxStoreDel (ctx);
- }
- }
+ struct AFB_clientCtx *ctx;
+ long idx;
+
+ // Loop on Sessions Table and remove anything that is older than timeout
+ for (idx=0; idx < sessions.max; idx++) {
+ ctx = sessions.store[idx];
+ if (ctx != NULL && ctxStoreTooOld(ctx, now)) {
+ ctxClientClose (ctx);
+ }
+ }
}
// This function will return exiting client context or newly created client context
-AFB_clientCtx *ctxClientGet (AFB_request *request, int idx)
+struct AFB_clientCtx *ctxClientGetForUuid (const char *uuid)
{
- AFB_clientCtx *clientCtx=NULL;
- const char *uuid;
- uuid_t newuuid;
-
- if (request->config->token == NULL) return NULL;
-
- // Check if client as a context or not inside the URL
- uuid = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, key_uuid);
-
- // if UUID in query we're restfull with no cookies otherwise check for cookie
- if (uuid != NULL)
- request->restfull = TRUE;
- else {
- char cookie[64];
- request->restfull = FALSE;
- snprintf(cookie, sizeof cookie, "%s-%d", COOKIE_NAME, request->config->httpdPort);
- uuid = MHD_lookup_connection_value (request->connection, MHD_COOKIE_KIND, cookie);
- };
-
- // Warning when no cookie defined MHD_lookup_connection_value may return something !!!
- if ((uuid != NULL) && (strnlen (uuid, 10) >= 10)) {
- // search if client context exist and it not timeout let's use it
- clientCtx = ctxStoreSearch (uuid);
-
+ uuid_t newuuid;
+ struct AFB_clientCtx *clientCtx;
+ time_t now;
+
+ /* search for an existing one not too old */
+ now = NOW;
+ ctxStoreCleanUp (now);
+ clientCtx = uuid != NULL ? ctxStoreSearch (uuid) : NULL;
if (clientCtx) {
- if (ctxStoreToOld (clientCtx, request->config->cntxTimeout)) {
- // this session is too old let's delete it
- ctxStoreDel (clientCtx);
- clientCtx = NULL;
- } else {
- request->context=clientCtx->contexts[idx];
- request->handle = clientCtx->plugins[idx]->handle;
- request->uuid= uuid;
- return clientCtx;
- }
+ clientCtx->refcount++;
+ return clientCtx;
}
- }
- // we have no session let's create one otherwise let's clean any exiting values
- if (clientCtx == NULL) {
- clientCtx = calloc(1, sizeof(AFB_clientCtx)); // init NULL clientContext
- clientCtx->contexts = calloc (1, (unsigned)request->config->pluginCount * (sizeof (void*)));
- clientCtx->plugins = request->plugins;
- }
-
- uuid_generate(newuuid); // create a new UUID
- uuid_unparse_lower(newuuid, clientCtx->uuid);
-
- // if table is full at 50% let's clean it up
- if(sessions.count > (sessions.max / 2)) ctxStoreGarbage(request->config->cntxTimeout);
-
- // finally add uuid into hashtable
- if (AFB_SUCCESS != ctxStoreAdd (clientCtx)) {
- free (clientCtx);
- return NULL;
- }
-
- // if (verbose) fprintf (stderr, "ctxClientGet New uuid=[%s] token=[%s] timestamp=%d\n", clientCtx->uuid, clientCtx->token, clientCtx->timeStamp);
- request->context = clientCtx->contexts[idx];
- request->handle = clientCtx->plugins[idx]->handle;
- request->uuid=clientCtx->uuid;
- return clientCtx;
+ /* mimic old behaviour */
+/*
+TODO remove? not remove?
+ if (sessions.initok == NULL)
+ return NULL;
+*/
+ /* check the uuid if given */
+ if (uuid != NULL && strlen(uuid) >= sizeof clientCtx->uuid)
+ return NULL;
+
+ /* returns a new one */
+ clientCtx = calloc(1, sizeof(struct AFB_clientCtx)); // init NULL clientContext
+ if (clientCtx != NULL) {
+ clientCtx->contexts = calloc ((unsigned)sessions.apicount, sizeof(*clientCtx->contexts));
+ if (clientCtx->contexts != NULL) {
+ /* generate the uuid */
+ if (uuid == NULL) {
+ uuid_generate(newuuid);
+ uuid_unparse_lower(newuuid, clientCtx->uuid);
+ } else {
+ strcpy(clientCtx->uuid, uuid);
+ }
+ strcpy(clientCtx->token, sessions.initok);
+ clientCtx->expiration = now + sessions.timeout;
+ clientCtx->refcount = 1;
+ if (ctxStoreAdd (clientCtx))
+ return clientCtx;
+ free(clientCtx->contexts);
+ }
+ free(clientCtx);
+ }
+ return NULL;
}
-// Sample Generic Ping Debug API
-AFB_error ctxTokenCheck (AFB_clientCtx *clientCtx, AFB_request *request)
+struct AFB_clientCtx *ctxClientGet(struct AFB_clientCtx *clientCtx)
{
- const char *token;
-
- if (clientCtx->contexts == NULL)
- return AFB_EMPTY;
-
- // this time have to extract token from query list
- token = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, key_token);
-
- // if not token is providing we refuse the exchange
- if ((token == NULL) || (clientCtx->token == NULL))
- return AFB_FALSE;
-
- // compare current token with previous one
- if ((0 == strcmp (token, clientCtx->token)) && (!ctxStoreToOld (clientCtx, request->config->cntxTimeout))) {
- return AFB_SUCCESS;
- }
+ if (clientCtx != NULL)
+ clientCtx->refcount++;
+ return clientCtx;
+}
- // Token is not valid let move level of assurance to zero and free attached client handle
- return AFB_FAIL;
+void ctxClientPut(struct AFB_clientCtx *clientCtx)
+{
+ if (clientCtx != NULL) {
+ assert(clientCtx->refcount != 0);
+ --clientCtx->refcount;
+ }
}
// Free Client Session Context
-AFB_error ctxTokenReset (AFB_clientCtx *clientCtx, AFB_request *request)
+void ctxClientClose (struct AFB_clientCtx *clientCtx)
{
- if (clientCtx == NULL)
- return AFB_EMPTY;
- //if (verbose) fprintf (stderr, "ctxClientReset New uuid=[%s] token=[%s] timestamp=%d\n", clientCtx->uuid, clientCtx->token, clientCtx->timeStamp);
-
- // Search for an existing client with the same UUID
- clientCtx = ctxStoreSearch (clientCtx->uuid);
- if (clientCtx == NULL)
- return AFB_FALSE;
-
- // Remove client from table
- ctxStoreDel (clientCtx);
-
- return AFB_SUCCESS;
+ assert(clientCtx != NULL);
+ if (clientCtx->created) {
+ clientCtx->created = 0;
+ ctxUuidFreeCB (clientCtx);
+ }
+ if (clientCtx->refcount == 0)
+ ctxStoreDel (clientCtx);
}
-// generate a new token
-AFB_error ctxTokenCreate (AFB_clientCtx *clientCtx, AFB_request *request)
+// Sample Generic Ping Debug API
+int ctxTokenCheckLen (struct AFB_clientCtx *clientCtx, const char *token, size_t length)
{
- uuid_t newuuid;
- const char *token;
-
- if (clientCtx == NULL)
- return AFB_EMPTY;
-
- // if config->token!="" then verify that we have the right initial share secret
- if (request->config->token[0] != '\0') {
+ assert(clientCtx != NULL);
+ assert(token != NULL);
- // check for initial token secret and return if not presented
- token = MHD_lookup_connection_value(request->connection, MHD_GET_ARGUMENT_KIND, key_token);
- if (token == NULL)
- return AFB_UNAUTH;
+ // compare current token with previous one
+ if (ctxStoreTooOld (clientCtx, NOW))
+ return 0;
- // verify that it fits with initial tokens fit
- if (strcmp(request->config->token, token))
- return AFB_UNAUTH;
- }
+ if (clientCtx->token[0] && (length >= sizeof(clientCtx->token) || strncmp (token, clientCtx->token, length) || clientCtx->token[length]))
+ return 0;
- // create a UUID as token value
- uuid_generate(newuuid);
- uuid_unparse_lower(newuuid, clientCtx->token);
+ clientCtx->created = 1; /* creates by default */
+ return 1;
+}
- // keep track of time for session timeout and further clean up
- clientCtx->timeStamp=time(NULL);
+// Sample Generic Ping Debug API
+int ctxTokenCheck (struct AFB_clientCtx *clientCtx, const char *token)
+{
+ assert(clientCtx != NULL);
+ assert(token != NULL);
- // Token is also store in context but it might be convenient for plugin to access it directly
- return AFB_SUCCESS;
+ return ctxTokenCheckLen(clientCtx, token, strlen(token));
}
-
// generate a new token and update client context
-AFB_error ctxTokenRefresh (AFB_clientCtx *clientCtx, AFB_request *request)
+void ctxTokenNew (struct AFB_clientCtx *clientCtx)
{
- uuid_t newuuid;
-
- if (clientCtx == NULL)
- return AFB_EMPTY;
-
- // Check if the old token is valid
- if (ctxTokenCheck (clientCtx, request) != AFB_SUCCESS)
- return AFB_FAIL;
+ uuid_t newuuid;
- // Old token was valid let's regenerate a new one
- uuid_generate(newuuid); // create a new UUID
- uuid_unparse_lower(newuuid, clientCtx->token);
+ assert(clientCtx != NULL);
- // keep track of time for session timeout and further clean up
- clientCtx->timeStamp=time(NULL);
+ // Old token was valid let's regenerate a new one
+ uuid_generate(newuuid); // create a new UUID
+ uuid_unparse_lower(newuuid, clientCtx->token);
- return AFB_SUCCESS;
+ // keep track of time for session timeout and further clean up
+ clientCtx->expiration = NOW + sessions.timeout;
}
Code Review / src / app-framework-binder.git / blobdiff