*
*/
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <time.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <uuid/uuid.h>
+#include <assert.h>
+
-#include "local-def.h"
+/*
#include <dirent.h>
#include <string.h>
-#include <time.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <pthread.h>
#include <search.h>
+#include <assert.h>
+*/
#include "afb-apis.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
int max;
int timeout;
int apicount;
+ const char *initok;
} sessions;
static const char key_uuid[] = "uuid";
}
// Create a new store in RAM, not that is too small it will be automatically extended
-void ctxStoreInit (int nbSession, int timeout, int apicount)
+void ctxStoreInit (int nbSession, int timeout, int apicount, const char *initok)
{
-
- // let's create as store as hashtable does not have any
- sessions.store = calloc (1 + (unsigned)nbSession, sizeof(AFB_clientCtx));
- sessions.max = nbSession;
- sessions.timeout = timeout;
- sessions.apicount = apicount;
+ // let's create as store as hashtable does not have any
+ sessions.store = calloc (1 + (unsigned)nbSession, sizeof(AFB_clientCtx));
+ sessions.max = nbSession;
+ sessions.timeout = timeout;
+ sessions.apicount = apicount;
+ 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)
int idx;
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 (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--;
+ ctxUuidFreeCB (client);
+ status = 1;
+ goto deleted;
+ }
}
-
+ status = 0;
+deleted:
pthread_mutex_unlock(&sessions.mutex);
return status;
}
-static AFB_error ctxStoreAdd (AFB_clientCtx *client)
+static int ctxStoreAdd (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 ctxStoreTooOld (AFB_clientCtx *ctx, int timeout)
+static int ctxStoreTooOld (AFB_clientCtx *ctx, time_t now)
{
- int res;
- time_t now = time(NULL);
- res = (ctx->timeStamp + timeout) <= now;
- return res;
+ return ctx->timeStamp <= now;
}
// Loop on every entry and remove old context sessions.hash
-void ctxStoreGarbage (const int timeout)
+void ctxStoreGarbage ()
{
AFB_clientCtx *ctx;
long idx;
+ time_t now = NOW;
// 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, timeout))) {
+ if (ctx != NULL && ctxStoreTooOld(ctx, now)) {
ctxStoreDel (ctx);
}
}
}
// This function will return exiting client context or newly created client context
-AFB_clientCtx *ctxClientGet (AFB_request *request)
+AFB_clientCtx *ctxClientGet (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;
+ AFB_clientCtx *clientCtx;
+ /* search for an existing one not too old */
+ clientCtx = uuid != NULL ? ctxStoreSearch (uuid) : NULL;
if (clientCtx) {
- if (ctxStoreTooOld (clientCtx, sessions.timeout)) {
- // this session is too old let's delete it
- ctxStoreDel (clientCtx);
- clientCtx = NULL;
- } else {
- return clientCtx;
- }
+ if (!ctxStoreTooOld (clientCtx, NOW))
+ return clientCtx;
+ ctxStoreDel (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 ((unsigned)sessions.apicount, sizeof (void*));
- }
-
- 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(sessions.timeout);
- // finally add uuid into hashtable
- if (AFB_SUCCESS != ctxStoreAdd (clientCtx)) {
- free (clientCtx);
- return NULL;
- }
- return clientCtx;
-}
-
-// Sample Generic Ping Debug API
-AFB_error ctxTokenCheck (AFB_clientCtx *clientCtx, AFB_request *request)
-{
- 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);
+ /* mimic old behaviour */
+ if (sessions.initok == NULL)
+ return NULL;
- // if not token is providing we refuse the exchange
- if ((token == NULL) || (clientCtx->token == NULL))
- return AFB_FALSE;
+ /* cleanup before creating */
+ if(2 * sessions.count >= sessions.max)
+ ctxStoreGarbage();
- // compare current token with previous one
- if ((0 == strcmp (token, clientCtx->token)) && (!ctxStoreTooOld (clientCtx, sessions.timeout))) {
- return AFB_SUCCESS;
- }
-
- // Token is not valid let move level of assurance to zero and free attached client handle
- return AFB_FAIL;
+ /* returns a new one */
+ clientCtx = calloc(1, sizeof(AFB_clientCtx)); // init NULL clientContext
+ if (clientCtx != NULL) {
+ clientCtx->contexts = calloc ((unsigned)sessions.apicount, sizeof (void*));
+ if (clientCtx->contexts != NULL) {
+ /* generate the uuid */
+ uuid_generate(newuuid);
+ uuid_unparse_lower(newuuid, clientCtx->uuid);
+ clientCtx->timeStamp = time(NULL) + sessions.timeout;
+ strcpy(clientCtx->token, sessions.initok);
+ if (ctxStoreAdd (clientCtx))
+ return clientCtx;
+ free(clientCtx->contexts);
+ }
+ free(clientCtx);
+ }
+ return NULL;
}
// Free Client Session Context
-AFB_error ctxTokenReset (AFB_clientCtx *clientCtx, AFB_request *request)
+int ctxClientClose (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);
+ return ctxStoreDel (clientCtx);
}
-// generate a new token
-AFB_error ctxTokenCreate (AFB_clientCtx *clientCtx, AFB_request *request)
+// Sample Generic Ping Debug API
+int ctxTokenCheck (AFB_clientCtx *clientCtx, const char *token)
{
- 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') {
-
- // 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;
-
- // verify that it fits with initial tokens fit
- if (strcmp(request->config->token, token))
- return AFB_UNAUTH;
- }
-
- // create a UUID as token value
- uuid_generate(newuuid);
- uuid_unparse_lower(newuuid, clientCtx->token);
-
- // keep track of time for session timeout and further clean up
- clientCtx->timeStamp=time(NULL);
-
- // Token is also store in context but it might be convenient for plugin to access it directly
- return AFB_SUCCESS;
+ assert(clientCtx != NULL);
+ assert(token != NULL);
+
+ // compare current token with previous one
+ if (ctxStoreTooOld (clientCtx, NOW))
+ return 0;
+ if (!clientCtx->token[0] || 0 == strcmp (token, clientCtx->token)) {
+ clientCtx->timeStamp = time(NULL) + sessions.timeout;
+ return 1;
+ }
+
+ // Token is not valid let move level of assurance to zero and free attached client handle
+ return 0;
}
-
// generate a new token and update client context
-AFB_error ctxTokenRefresh (AFB_clientCtx *clientCtx, AFB_request *request)
+int ctxTokenNew (AFB_clientCtx *clientCtx)
{
- uuid_t newuuid;
-
- if (clientCtx == NULL)
- return AFB_EMPTY;
+ uuid_t newuuid;
- // Check if the old token is valid
- if (ctxTokenCheck (clientCtx, request) != AFB_SUCCESS)
- return AFB_FAIL;
+ assert(clientCtx != NULL);
- // Old token was valid let's regenerate a new one
- uuid_generate(newuuid); // create a new UUID
- uuid_unparse_lower(newuuid, clientCtx->token);
+ // Old token was valid let's regenerate a new one
+ uuid_generate(newuuid); // create a new UUID
+ uuid_unparse_lower(newuuid, clientCtx->token);
- // keep track of time for session timeout and further clean up
- clientCtx->timeStamp=time(NULL);
+ // keep track of time for session timeout and further clean up
+ clientCtx->timeStamp = time(NULL) + sessions.timeout;
- return AFB_SUCCESS;
+ return 1;
}
Code Review / src / app-framework-binder.git / blobdiff