From: Michael Wallner <mike@php.net>
Date: Mon, 6 Jan 2020 11:31:51 +0000 (+0100)
Subject: libmemcached-1.0: add memcached_return_t::MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG
X-Git-Tag: pre_cmake~84
X-Git-Url: https://git.m6w6.name/?p=awesomized%2Flibmemcached;a=commitdiff_plain;h=a83eb6704af40530cf38935cb30dd576af563e61

libmemcached-1.0: add memcached_return_t::MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG

detect a possible string truncation and return an appropriate error
---

diff --git a/docs/source/libmemcached/memcached_return_t.rst b/docs/source/libmemcached/memcached_return_t.rst
index 9eba3fab..0cf7d762 100644
--- a/docs/source/libmemcached/memcached_return_t.rst
+++ b/docs/source/libmemcached/memcached_return_t.rst
@@ -123,10 +123,11 @@ Libmemcached return types:
 :c:type:`MEMCACHED_PARSE_USER_ERROR`
 
 :c:type:`MEMCACHED_DEPRECATED`
+
+:c:type:`MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG`
    
 --------
 SEE ALSO
 --------
 
 :manpage:`memcached` :manpage:`libmemcached` :manpage:`memcached_client_error` or :manpage:`memcached_worker_error`
-
diff --git a/libmemcached-1.0/types/return.h b/libmemcached-1.0/types/return.h
index f4ec9b08..80c90515 100644
--- a/libmemcached-1.0/types/return.h
+++ b/libmemcached-1.0/types/return.h
@@ -86,6 +86,7 @@ enum memcached_return_t {
   MEMCACHED_IN_PROGRESS,
   MEMCACHED_SERVER_TEMPORARILY_DISABLED,
   MEMCACHED_SERVER_MEMORY_ALLOCATION_FAILURE,
+  MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG,
   MEMCACHED_MAXIMUM_RETURN, /* Always add new error code before */
   MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE= MEMCACHED_ERROR
 };
diff --git a/libmemcached/connect.cc b/libmemcached/connect.cc
index 006810bf..6d900377 100644
--- a/libmemcached/connect.cc
+++ b/libmemcached/connect.cc
@@ -466,7 +466,10 @@ static memcached_return_t unix_socket_connect(memcached_instance_st* server)
 
     memset(&servAddr, 0, sizeof (struct sockaddr_un));
     servAddr.sun_family= AF_UNIX;
-    strncpy(servAddr.sun_path, server->hostname(), sizeof(servAddr.sun_path)); /* Copy filename */
+    if (strlen(server->hostname()) >= sizeof(servAddr.sun_path)) {
+        return memcached_set_error(*server, MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG, MEMCACHED_AT);
+    }
+    strncpy(servAddr.sun_path, server->hostname(), sizeof(servAddr.sun_path)-1); /* Copy filename */
 
     if (connect(server->fd, (struct sockaddr *)&servAddr, sizeof(servAddr)) == -1)
     {
diff --git a/libmemcached/strerror.cc b/libmemcached/strerror.cc
index 7a4e0a82..c5615ca9 100644
--- a/libmemcached/strerror.cc
+++ b/libmemcached/strerror.cc
@@ -188,6 +188,9 @@ const char *memcached_strerror(const memcached_st *, memcached_return_t rc)
   case MEMCACHED_SERVER_MEMORY_ALLOCATION_FAILURE:
     return "SERVER FAILED TO ALLOCATE OBJECT";
 
+  case MEMCACHED_UNIX_SOCKET_PATH_TOO_BIG:
+    return "UNIX SOCKET PATH TOO LARGE";
+
   default:
   case MEMCACHED_MAXIMUM_RETURN:
     return "INVALID memcached_return_t";
diff --git a/tests/libmemcached-1.0/mem_functions.cc b/tests/libmemcached-1.0/mem_functions.cc
index 321a35db..0e6bcb7f 100644
--- a/tests/libmemcached-1.0/mem_functions.cc
+++ b/tests/libmemcached-1.0/mem_functions.cc
@@ -496,7 +496,7 @@ test_return_t memcached_return_t_TEST(memcached_st *memc)
                         4159057246U, 3425930182U, 2593724503U,  1868899624U,
                         1769812374U, 2302537950U, 1110330676U, 3365377466U, 
                         1336171666U, 3021258493U, 2334992265U, 3861994737U, 
-                        3582734124U, 3365377466U };
+                        3582734124U, 3889811103, 3365377466U };
 
   // You have updated the memcache_error messages but not updated docs/tests.
   for (int rc= int(MEMCACHED_SUCCESS); rc < int(MEMCACHED_MAXIMUM_RETURN); ++rc)
@@ -512,7 +512,7 @@ test_return_t memcached_return_t_TEST(memcached_st *memc)
     }
     test_compare(values[rc], hash_val);
   }
-  test_compare(49, int(MEMCACHED_MAXIMUM_RETURN));
+  test_compare(50, int(MEMCACHED_MAXIMUM_RETURN));
 
   return TEST_SUCCESS;
 }