Added some documentation and fixed a test

src/modules/helloacl.c

@@ -1,4 +1,5 @@
-/* ACL API example - An example of performing custom password authentication
+/* ACL API example - An example for performing custom synchronous and
+ * asynchronous password authentication.
  *
  * -----------------------------------------------------------------------------
  *
@@ -32,11 +33,6 @@
 
 #define REDISMODULE_EXPERIMENTAL_API
 #include "../redismodule.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#include <strings.h>
 #include <pthread.h>
 #include <unistd.h>
 
@@ -51,7 +47,7 @@ int RevokeCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, in
     REDISMODULE_NOT_USED(argc);
 
     if (global_auth_client_id) {
-        RedisModule_DisconnectClient(ctx, global_auth_client_id);
+        RedisModule_DeauthenticateAndCloseClient(ctx, global_auth_client_id);
         return RedisModule_ReplyWithSimpleString(ctx, "OK");
     } else {
         return RedisModule_ReplyWithError(ctx, "Global user currently not used");    

src/server.h

@@ -481,7 +481,8 @@ typedef void (*moduleTypeDigestFunc)(struct RedisModuleDigest *digest, void *val
 typedef size_t (*moduleTypeMemUsageFunc)(const void *value);
 typedef void (*moduleTypeFreeFunc)(void *value);
 
-/* TODO */
+/* A callback that is called when the client authentication changes. This
+ * needs to be exposed since you can't cast a function pointer to (void *) */
 typedef void (*RedisModuleUserChangedFunc) (uint64_t client_id, void *privdata);
 
 
@@ -803,13 +804,15 @@ typedef struct client {
     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
     sds peerid;             /* Cached peer ID. */
     listNode *client_list_node; /* list node in client list */
-    RedisModuleUserChangedFunc auth_callback; /* Callback to execute when the 
-                                                * authentication changes */
+    RedisModuleUserChangedFunc auth_callback; /* Module callback to execute
+                                               * when the authenticated user
+                                               * changes. */
     void *auth_callback_privdata; /* Private data that is passed when the auth
-                                   * callback is executed */
+                                   * changed callback is executed. Opaque for 
+                                   * Redis Core. */
     void *auth_module;      /* The module that owns the callback, which is used
                              * to disconnect the client if the module is 
-                             * unloaded to allow for cleanup. */
+                             * unloaded for cleanup. Opaque for Redis Core.*/
 
     /* If this client is in tracking mode and this field is non zero,
      * invalidation messages for keys fetched by this client will be send to

tests/modules/auth.c

@@ -34,7 +34,7 @@
 #include "redismodule.h"
 
 // A simple global user
-static RedisModuleUser *global;
+static RedisModuleUser *global = NULL;
 static long long client_change_delta = 0;
 
 void UserChangedCallback(uint64_t client_id, void *privdata) {
@@ -44,6 +44,8 @@ void UserChangedCallback(uint64_t client_id, void *privdata) {
 }
 
 int Auth_CreateModuleUser(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
+    REDISMODULE_NOT_USED(argv);
+    REDISMODULE_NOT_USED(argc);
 
     if (global) {
         RedisModule_FreeModuleUser(global);
@@ -58,6 +60,8 @@ int Auth_CreateModuleUser(RedisModuleCtx *ctx, RedisModuleString **argv, int arg
 }
 
 int Auth_AuthModuleUser(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
+    REDISMODULE_NOT_USED(argv);
+    REDISMODULE_NOT_USED(argc);
     uint64_t client_id;
     RedisModule_AuthenticateClientWithUser(ctx, global, UserChangedCallback, NULL, &client_id);
 
@@ -82,6 +86,8 @@ int Auth_AuthRealUser(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
 }
 
 int Auth_ChangeCount(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
+    REDISMODULE_NOT_USED(argv);
+    REDISMODULE_NOT_USED(argc);
     long long result = client_change_delta;
     client_change_delta = 0;
     return RedisModule_ReplyWithLongLong(ctx, result);
@@ -112,7 +118,5 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
         Auth_ChangeCount,"",0,0,0) == REDISMODULE_ERR)
         return REDISMODULE_ERR;
 
-    client_change_delta = 0;
-
     return REDISMODULE_OK;
 }