Huw Davies : ws2_32: Avoid using inet_ntoa() which isn't thread-safe.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2569123d003be01638978c0bdab2dfe62f935d28
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2569123d003be01638978c0bdab2dfe62f935d28

Author: Huw Davies <huw at codeweavers.com>
Date:   Mon Aug 10 15:08:44 2015 +0100

ws2_32: Avoid using inet_ntoa() which isn't thread-safe.

---

 dlls/ws2_32/socket.c | 31 ++++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 11 deletions(-)

diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 79aaaf9..ca82ec9 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -283,9 +283,18 @@ static inline const char *debugstr_sockaddr( const struct WS_sockaddr *a )
     switch (a->sa_family)
     {
     case WS_AF_INET:
+    {
+        char buf[16];
+        const char *p;
+        struct WS_sockaddr_in *sin = (struct WS_sockaddr_in *)a;
+
+        p = WS_inet_ntop( WS_AF_INET, &sin->sin_addr, buf, sizeof(buf) );
+        if (!p)
+            p = "(unknown IPv4 address)";
+
         return wine_dbg_sprintf("{ family AF_INET, address %s, port %d }",
-                                inet_ntoa(((const struct sockaddr_in *)a)->sin_addr),
-                                ntohs(((const struct sockaddr_in *)a)->sin_port));
+                                p, ntohs(sin->sin_port));
+    }
     case WS_AF_INET6:
     {
         char buf[46];
@@ -4004,15 +4013,15 @@ WS_u_short WINAPI WS_ntohs(WS_u_short netshort)
  */
 char* WINAPI WS_inet_ntoa(struct WS_in_addr in)
 {
-    char* s = inet_ntoa(*((struct in_addr*)&in));
-    if( s )
-    {
-        struct per_thread_data *data = get_per_thread_data();
-        strcpy(data->ntoa_buffer, s);
-        return data->ntoa_buffer;
-    }
-    SetLastError(wsaErrno());
-    return NULL;
+    struct per_thread_data *data = get_per_thread_data();
+
+    sprintf( data->ntoa_buffer, "%u.%u.%u.%u",
+            (unsigned int)(ntohl( in.WS_s_addr ) >> 24 & 0xff),
+            (unsigned int)(ntohl( in.WS_s_addr ) >> 16 & 0xff),
+            (unsigned int)(ntohl( in.WS_s_addr ) >> 8 & 0xff),
+            (unsigned int)(ntohl( in.WS_s_addr ) & 0xff) );
+
+    return data->ntoa_buffer;
 }
 
 static const char *debugstr_wsaioctl(DWORD ioctl)