X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/af0e51f2e15bc9c63d11229e64ce7884e1a1402a..7229d60d0356e94f553623e0492f636687ac39e6:/src/networking.c?ds=sidebyside

diff --git a/src/networking.c b/src/networking.c
index 48febb09..976b472a 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -14,14 +14,20 @@ redisClient *createClient(int fd) {
     redisClient *c = zmalloc(sizeof(redisClient));
     c->bufpos = 0;
 
-    anetNonBlock(NULL,fd);
-    anetTcpNoDelay(NULL,fd);
-    if (aeCreateFileEvent(server.el,fd,AE_READABLE,
-        readQueryFromClient, c) == AE_ERR)
-    {
-        close(fd);
-        zfree(c);
-        return NULL;
+    /* passing -1 as fd it is possible to create a non connected client.
+     * This is useful since all the Redis commands needs to be executed
+     * in the context of a client. When commands are executed in other
+     * contexts (for instance a Lua script) we need a non connected client. */
+    if (fd != -1) {
+        anetNonBlock(NULL,fd);
+        anetTcpNoDelay(NULL,fd);
+        if (aeCreateFileEvent(server.el,fd,AE_READABLE,
+            readQueryFromClient, c) == AE_ERR)
+        {
+            close(fd);
+            zfree(c);
+            return NULL;
+        }
     }
 
     selectDb(c,0);
@@ -51,7 +57,7 @@ redisClient *createClient(int fd) {
     c->pubsub_patterns = listCreate();
     listSetFreeMethod(c->pubsub_patterns,decrRefCount);
     listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
-    listAddNodeTail(server.clients,c);
+    if (fd != -1) listAddNodeTail(server.clients,c);
     initClientMultiState(c);
     return c;
 }
@@ -59,6 +65,7 @@ redisClient *createClient(int fd) {
 /* Set the event loop to listen for write events on the client's socket.
  * Typically gets called every time a reply is built. */
 int _installWriteEvent(redisClient *c) {
+    if (c->flags & REDIS_LUA_CLIENT) return REDIS_OK;
     if (c->fd <= 0) return REDIS_ERR;
     if (c->bufpos == 0 && listLength(c->reply) == 0 &&
         (c->replstate == REDIS_REPL_NONE ||
@@ -419,7 +426,7 @@ void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
 
     cfd = anetTcpAccept(server.neterr, fd, cip, &cport);
     if (cfd == AE_ERR) {
-        redisLog(REDIS_VERBOSE,"Accepting client connection: %s", server.neterr);
+        redisLog(REDIS_WARNING,"Accepting client connection: %s", server.neterr);
         return;
     }
     redisLog(REDIS_VERBOSE,"Accepted %s:%d", cip, cport);
@@ -434,7 +441,7 @@ void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
 
     cfd = anetUnixAccept(server.neterr, fd);
     if (cfd == AE_ERR) {
-        redisLog(REDIS_VERBOSE,"Accepting client connection: %s", server.neterr);
+        redisLog(REDIS_WARNING,"Accepting client connection: %s", server.neterr);
         return;
     }
     redisLog(REDIS_VERBOSE,"Accepted connection to %s", server.unixsocket);
@@ -712,6 +719,10 @@ int processMultibulkBuffer(redisClient *c) {
         if (newline == NULL)
             return REDIS_ERR;
 
+        /* Buffer should also contain \n */
+        if (newline-(c->querybuf) > ((signed)sdslen(c->querybuf)-2))
+            return REDIS_ERR;
+
         /* We know for sure there is a whole line since newline != NULL,
          * so go ahead and find out the multi bulk length. */
         redisAssert(c->querybuf[0] == '*');
@@ -733,9 +744,6 @@ int processMultibulkBuffer(redisClient *c) {
         /* Setup argv array on client structure */
         if (c->argv) zfree(c->argv);
         c->argv = zmalloc(sizeof(robj*)*c->multibulklen);
-
-        /* Search new newline */
-        newline = strchr(c->querybuf+pos,'\r');
     }
 
     redisAssert(c->multibulklen > 0);
@@ -743,27 +751,30 @@ int processMultibulkBuffer(redisClient *c) {
         /* Read bulk length if unknown */
         if (c->bulklen == -1) {
             newline = strchr(c->querybuf+pos,'\r');
-            if (newline != NULL) {
-                if (c->querybuf[pos] != '$') {
-                    addReplyErrorFormat(c,
-                        "Protocol error: expected '$', got '%c'",
-                        c->querybuf[pos]);
-                    setProtocolError(c,pos);
-                    return REDIS_ERR;
-                }
+            if (newline == NULL)
+                break;
 
-                ok = string2ll(c->querybuf+pos+1,newline-(c->querybuf+pos+1),&ll);
-                if (!ok || ll < 0 || ll > 512*1024*1024) {
-                    addReplyError(c,"Protocol error: invalid bulk length");
-                    setProtocolError(c,pos);
-                    return REDIS_ERR;
-                }
-                pos += newline-(c->querybuf+pos)+2;
-                c->bulklen = ll;
-            } else {
-                /* No newline in current buffer, so wait for more data */
+            /* Buffer should also contain \n */
+            if (newline-(c->querybuf) > ((signed)sdslen(c->querybuf)-2))
                 break;
+
+            if (c->querybuf[pos] != '$') {
+                addReplyErrorFormat(c,
+                    "Protocol error: expected '$', got '%c'",
+                    c->querybuf[pos]);
+                setProtocolError(c,pos);
+                return REDIS_ERR;
             }
+
+            ok = string2ll(c->querybuf+pos+1,newline-(c->querybuf+pos+1),&ll);
+            if (!ok || ll < 0 || ll > 512*1024*1024) {
+                addReplyError(c,"Protocol error: invalid bulk length");
+                setProtocolError(c,pos);
+                return REDIS_ERR;
+            }
+
+            pos += newline-(c->querybuf+pos)+2;
+            c->bulklen = ll;
         }
 
         /* Read bulk argument */