From d3f7325607f4711aa6a0c5fa32c133afc67fa266 Mon Sep 17 00:00:00 2001
From: Brian Aker <brian@tangent.org>
Date: Mon, 12 Nov 2007 00:44:43 -0800
Subject: [PATCH] Fixed bug where zero length key was provided.

---
 ChangeLog                | 1 +
 include/memcached.h      | 1 +
 lib/memcached_auto.c     | 3 +++
 lib/memcached_delete.c   | 3 +++
 lib/memcached_get.c      | 3 +++
 lib/memcached_storage.c  | 3 +++
 lib/memcached_strerror.c | 2 ++
 7 files changed, 16 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 2b273ae5..136a58df 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,7 @@
   * different buffers are now kept for different connections to
     speed up async efforts
   * Modified increment/decrement functions to return uint64_t values
+  * Fixed bug in cases where zero length keys were provided
 
 0.8 Mon Nov  5 10:40:41 PST 2007
   * Adding support for CRC hash method 
diff --git a/include/memcached.h b/include/memcached.h
index 6bf1e0be..bd056ade 100644
--- a/include/memcached.h
+++ b/include/memcached.h
@@ -60,6 +60,7 @@ typedef enum {
   MEMCACHED_ERRNO,
   MEMCACHED_FAIL_UNIX_SOCKET,
   MEMCACHED_NOT_SUPPORTED,
+  MEMCACHED_NO_KEY_PROVIDED,
   MEMCACHED_MAXIMUM_RETURN, /* Always add new error code before */
 } memcached_return;
 
diff --git a/lib/memcached_auto.c b/lib/memcached_auto.c
index ad91f75b..d7e30e56 100644
--- a/lib/memcached_auto.c
+++ b/lib/memcached_auto.c
@@ -11,6 +11,9 @@ static memcached_return memcached_auto(memcached_st *ptr,
   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
   unsigned int server_key;
 
+  if (key_length == 0)
+    return MEMCACHED_NO_KEY_PROVIDED;
+
   if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
     return MEMCACHED_NO_SERVERS;
 
diff --git a/lib/memcached_delete.c b/lib/memcached_delete.c
index 0ed6092a..cedfa442 100644
--- a/lib/memcached_delete.c
+++ b/lib/memcached_delete.c
@@ -11,6 +11,9 @@ memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_lengt
 
   LIBMEMCACHED_MEMCACHED_DELETE_START();
 
+  if (key_length == 0)
+    return MEMCACHED_NO_KEY_PROVIDED;
+
   if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
     return MEMCACHED_NO_SERVERS;
 
diff --git a/lib/memcached_get.c b/lib/memcached_get.c
index c0da409d..70d1b349 100644
--- a/lib/memcached_get.c
+++ b/lib/memcached_get.c
@@ -143,6 +143,9 @@ char *memcached_get(memcached_st *ptr, char *key, size_t key_length,
   memcached_string_st *result_buffer;
   LIBMEMCACHED_MEMCACHED_GET_START();
 
+  if (key_length == 0)
+    return MEMCACHED_NO_KEY_PROVIDED;
+
   if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
   {
     *error= MEMCACHED_NO_SERVERS;
diff --git a/lib/memcached_storage.c b/lib/memcached_storage.c
index 70201489..099c78ac 100644
--- a/lib/memcached_storage.c
+++ b/lib/memcached_storage.c
@@ -36,6 +36,9 @@ static memcached_return memcached_send(memcached_st *ptr,
   WATCHPOINT_ASSERT(value);
   WATCHPOINT_ASSERT(value_length);
 
+  if (key_length == 0)
+    return MEMCACHED_NO_KEY_PROVIDED;
+
   /* Leaving this WATCHPOINT_ASSERT in since only a library fubar could blow this */
 #ifdef NOT_DONE
   if (!(ptr->flags & MEM_NO_BLOCK) && ptr->write_buffer_offset != 0)
diff --git a/lib/memcached_strerror.c b/lib/memcached_strerror.c
index f541c17e..d2da6963 100644
--- a/lib/memcached_strerror.c
+++ b/lib/memcached_strerror.c
@@ -60,6 +60,8 @@ char *memcached_strerror(memcached_st *ptr, memcached_return rc)
     return "COULD NOT OPEN UNIX SOCKET";
   case MEMCACHED_NOT_SUPPORTED:
     return "ACTION NOT SUPPORTED";
+  case MEMCACHED_NO_KEY_PROVIDED:
+    return "A KEY LENGTH OF ZERO WAS PROVIDED";
   case MEMCACHED_MAXIMUM_RETURN:
     return "Gibberish returned!";
   default:
-- 
2.30.2