/*
- * Copyright (C) 2015 "IoT.bzh"
+ * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
* Author "Fulup Ar Foll"
*
* Licensed under the Apache License, Version 2.0 (the "License");
#include <string.h>
#include <uuid/uuid.h>
#include <assert.h>
+#include <errno.h>
+
+#include <json-c/json.h>
#include "session.h"
+#include "verbose.h"
#define NOW (time(NULL))
+struct client_value
+{
+ void *value;
+ void (*free_value)(void*);
+};
+
+struct cookie
+{
+ struct cookie *next;
+ const void *key;
+ void *value;
+ void (*free_value)(void*);
+};
+
+struct AFB_clientCtx
+{
+ unsigned refcount;
+ unsigned loa;
+ int timeout;
+ time_t expiration; // expiration time of the token
+ time_t access;
+ char uuid[37]; // long term authentication of remote client
+ char token[37]; // short term authentication of remote client
+ struct client_value *values;
+ struct cookie *cookies;
+};
+
// 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;
+ char initok[37];
} sessions;
-void *afb_context_get(struct afb_context *actx)
+/* generate a uuid */
+static void new_uuid(char uuid[37])
{
- 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;
+ uuid_t newuuid;
+ uuid_generate(newuuid);
+ uuid_unparse_lower(newuuid, uuid);
}
// Free context [XXXX Should be protected again memory abort XXXX]
static void ctxUuidFreeCB (struct AFB_clientCtx *client)
{
int idx;
+ struct cookie *cookie;
// If application add a handle let's free it now
- assert (client->contexts != NULL);
+ assert (client->values != NULL);
// 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);
+ ctxClientValueSet(client, idx, NULL, NULL);
+
+ // free cookies
+ cookie = client->cookies;
+ while (cookie != NULL) {
+ client->cookies = cookie->next;
+ if (cookie->value != NULL && cookie->free_value != NULL)
+ cookie->free_value(cookie->value);
+ free(cookie);
+ cookie = client->cookies;
+ }
}
// Create a new store in RAM, not that is too small it will be automatically extended
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);
+ if (initok == NULL)
+ /* without token, a secret is made to forbid creation of sessions */
+ new_uuid(sessions.initok);
+ else if (strlen(initok) < sizeof(sessions.store[0]->token))
+ strcpy(sessions.initok, initok);
+ else {
+ ERROR("initial token '%s' too long (max length 36)", initok);
exit(1);
}
- sessions.initok = initok;
}
static struct AFB_clientCtx *ctxStoreSearch (const char* uuid)
for (idx=0; idx < sessions.max; idx++) {
if (sessions.store[idx] == client) {
- sessions.store[idx]=NULL;
+ sessions.store[idx] = NULL;
sessions.count--;
status = 1;
goto deleted;
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]) {
- sessions.store[idx]= client;
+ sessions.store[idx] = client;
sessions.count++;
status = 1;
goto added;
// Check if context timeout or not
static int ctxStoreTooOld (struct AFB_clientCtx *ctx, time_t now)
{
- return ctx->expiration <= now;
+ assert (ctx != NULL);
+ return ctx->expiration < now;
+}
+
+// Check if context is active or not
+static int ctxIsActive (struct AFB_clientCtx *ctx, time_t now)
+{
+ assert (ctx != NULL);
+ return ctx->uuid[0] != 0 && ctx->expiration >= now;
}
// Loop on every entry and remove old context sessions.hash
}
}
-// This function will return exiting client context or newly created client context
-struct AFB_clientCtx *ctxClientGetForUuid (const char *uuid)
+static struct AFB_clientCtx *new_context (const char *uuid, int timeout, time_t now)
{
- uuid_t newuuid;
struct AFB_clientCtx *clientCtx;
+
+ /* allocates a new one */
+ clientCtx = calloc(1, sizeof(struct AFB_clientCtx) + ((unsigned)sessions.apicount * sizeof(*clientCtx->values)));
+ if (clientCtx == NULL) {
+ errno = ENOMEM;
+ goto error;
+ }
+ clientCtx->values = (void*)(clientCtx + 1);
+
+ /* generate the uuid */
+ if (uuid == NULL) {
+ new_uuid(clientCtx->uuid);
+ } else {
+ if (strlen(uuid) >= sizeof clientCtx->uuid) {
+ errno = EINVAL;
+ goto error2;
+ }
+ strcpy(clientCtx->uuid, uuid);
+ }
+
+ /* init the token */
+ strcpy(clientCtx->token, sessions.initok);
+ clientCtx->timeout = timeout;
+ if (timeout != 0)
+ clientCtx->expiration = now + timeout;
+ else {
+ clientCtx->expiration = (time_t)(~(time_t)0);
+ if (clientCtx->expiration < 0)
+ clientCtx->expiration = (time_t)(((unsigned long long)clientCtx->expiration) >> 1);
+ }
+ if (!ctxStoreAdd (clientCtx)) {
+ errno = ENOMEM;
+ goto error2;
+ }
+
+ clientCtx->access = now;
+ clientCtx->refcount = 1;
+ return clientCtx;
+
+error2:
+ free(clientCtx);
+error:
+ return NULL;
+}
+
+struct AFB_clientCtx *ctxClientCreate (const char *uuid, int timeout)
+{
time_t now;
- /* search for an existing one not too old */
+ /* cleaning */
now = NOW;
ctxStoreCleanUp (now);
- clientCtx = uuid != NULL ? ctxStoreSearch (uuid) : NULL;
- if (clientCtx) {
- clientCtx->refcount++;
- 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)
+ /* search for an existing one not too old */
+ if (uuid != NULL && ctxStoreSearch(uuid) != NULL) {
+ errno = EEXIST;
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);
+ return new_context(uuid, timeout, now);
+}
+
+// This function will return exiting client context or newly created client context
+struct AFB_clientCtx *ctxClientGetSession (const char *uuid, int *created)
+{
+ struct AFB_clientCtx *clientCtx;
+ time_t now;
+
+ /* cleaning */
+ now = NOW;
+ ctxStoreCleanUp (now);
+
+ /* search for an existing one not too old */
+ if (uuid != NULL) {
+ clientCtx = ctxStoreSearch(uuid);
+ if (clientCtx != NULL) {
+ *created = 0;
+ clientCtx->access = now;
+ clientCtx->refcount++;
+ return clientCtx;
}
- free(clientCtx);
}
- return NULL;
+
+ *created = 1;
+ return new_context(uuid, sessions.timeout, now);
}
-struct AFB_clientCtx *ctxClientGet(struct AFB_clientCtx *clientCtx)
+struct AFB_clientCtx *ctxClientAddRef(struct AFB_clientCtx *clientCtx)
{
if (clientCtx != NULL)
clientCtx->refcount++;
return clientCtx;
}
-void ctxClientPut(struct AFB_clientCtx *clientCtx)
+void ctxClientUnref(struct AFB_clientCtx *clientCtx)
{
if (clientCtx != NULL) {
assert(clientCtx->refcount != 0);
--clientCtx->refcount;
+ if (clientCtx->refcount == 0 && clientCtx->uuid[0] == 0) {
+ ctxStoreDel (clientCtx);
+ free(clientCtx);
+ }
}
}
void ctxClientClose (struct AFB_clientCtx *clientCtx)
{
assert(clientCtx != NULL);
- if (clientCtx->created) {
- clientCtx->created = 0;
+ if (clientCtx->uuid[0] != 0) {
+ clientCtx->uuid[0] = 0;
ctxUuidFreeCB (clientCtx);
+ if (clientCtx->refcount == 0) {
+ ctxStoreDel (clientCtx);
+ free(clientCtx);
+ }
}
- if (clientCtx->refcount == 0)
- ctxStoreDel (clientCtx);
}
// Sample Generic Ping Debug API
-int ctxTokenCheckLen (struct AFB_clientCtx *clientCtx, const char *token, size_t length)
+int ctxTokenCheck (struct AFB_clientCtx *clientCtx, const char *token)
{
assert(clientCtx != NULL);
assert(token != NULL);
// compare current token with previous one
- if (ctxStoreTooOld (clientCtx, NOW))
+ if (!ctxIsActive (clientCtx, NOW))
return 0;
- if (clientCtx->token[0] && (length >= sizeof(clientCtx->token) || strncmp (token, clientCtx->token, length) || clientCtx->token[length]))
+ if (clientCtx->token[0] && strcmp (token, clientCtx->token) != 0)
return 0;
- clientCtx->created = 1; /* creates by default */
return 1;
}
-// Sample Generic Ping Debug API
-int ctxTokenCheck (struct AFB_clientCtx *clientCtx, const char *token)
+// generate a new token and update client context
+void ctxTokenNew (struct AFB_clientCtx *clientCtx)
{
assert(clientCtx != NULL);
- assert(token != NULL);
- return ctxTokenCheckLen(clientCtx, token, strlen(token));
+ // Old token was valid let's regenerate a new one
+ new_uuid(clientCtx->token);
+
+ // keep track of time for session timeout and further clean up
+ if (clientCtx->timeout != 0)
+ clientCtx->expiration = NOW + clientCtx->timeout;
}
-// generate a new token and update client context
-void ctxTokenNew (struct AFB_clientCtx *clientCtx)
+const char *ctxClientGetUuid (struct AFB_clientCtx *clientCtx)
{
- uuid_t newuuid;
+ assert(clientCtx != NULL);
+ return clientCtx->uuid;
+}
+const char *ctxClientGetToken (struct AFB_clientCtx *clientCtx)
+{
assert(clientCtx != NULL);
+ return 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);
+unsigned ctxClientGetLOA (struct AFB_clientCtx *clientCtx)
+{
+ assert(clientCtx != NULL);
+ return clientCtx->loa;
+}
- // keep track of time for session timeout and further clean up
- clientCtx->expiration = NOW + sessions.timeout;
+void ctxClientSetLOA (struct AFB_clientCtx *clientCtx, unsigned loa)
+{
+ assert(clientCtx != NULL);
+ clientCtx->loa = loa;
+}
+
+void *ctxClientValueGet(struct AFB_clientCtx *clientCtx, int index)
+{
+ assert(clientCtx != NULL);
+ assert(index >= 0);
+ assert(index < sessions.apicount);
+ return clientCtx->values[index].value;
+}
+
+void ctxClientValueSet(struct AFB_clientCtx *clientCtx, int index, void *value, void (*free_value)(void*))
+{
+ struct client_value prev;
+ assert(clientCtx != NULL);
+ assert(index >= 0);
+ assert(index < sessions.apicount);
+ prev = clientCtx->values[index];
+ clientCtx->values[index] = (struct client_value){.value = value, .free_value = free_value};
+ if (prev.value != NULL && prev.value != value && prev.free_value != NULL)
+ prev.free_value(prev.value);
+}
+
+void *ctxClientCookieGet(struct AFB_clientCtx *clientCtx, const void *key)
+{
+ struct cookie *cookie;
+
+ cookie = clientCtx->cookies;
+ while(cookie != NULL) {
+ if (cookie->key == key)
+ return cookie->value;
+ cookie = cookie->next;
+ }
+ return NULL;
+}
+
+int ctxClientCookieSet(struct AFB_clientCtx *clientCtx, const void *key, void *value, void (*free_value)(void*))
+{
+ struct cookie *cookie;
+
+ /* search for a replacement */
+ cookie = clientCtx->cookies;
+ while(cookie != NULL) {
+ if (cookie->key == key) {
+ if (cookie->value != NULL && cookie->value != value && cookie->free_value != NULL)
+ cookie->free_value(cookie->value);
+ cookie->value = value;
+ cookie->free_value = free_value;
+ return 0;
+ }
+ cookie = cookie->next;
+ }
+
+ /* allocates */
+ cookie = malloc(sizeof *cookie);
+ if (cookie == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ cookie->key = key;
+ cookie->value = value;
+ cookie->free_value = free_value;
+ cookie->next = clientCtx->cookies;
+ clientCtx->cookies = cookie;
+ return 0;
}
Code Review / src / app-framework-binder.git / blobdiff