André Hentschel : ws2_32: Pass correct buffer length to WS_inet_ntop (Coverity).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ff01c2a19657a234bdc489b86648f655cbe4d99c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ff01c2a19657a234bdc489b866...

Author: André Hentschel <nerv(a)dawncrow.de>
Date:   Sun Jul 19 23:11:52 2015 +0200

ws2_32: Pass correct buffer length to WS_inet_ntop (Coverity).

---

 dlls/ws2_32/socket.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 4fe3a0b..d7e5276 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -7663,12 +7663,14 @@ INT WINAPI WSAAddressToStringA( LPSOCKADDR sockaddr, DWORD len,
     case WS_AF_INET6:
     {
         struct WS_sockaddr_in6 *sockaddr6 = (LPSOCKADDR_IN6) sockaddr;
+        size_t slen;
 
         buffer[0] = 0;
         if (len < sizeof(SOCKADDR_IN6)) return SOCKET_ERROR;
         if ((sockaddr6->sin6_port))
             strcpy(buffer, "[");
-        if (!WS_inet_ntop(WS_AF_INET6, &sockaddr6->sin6_addr, buffer+strlen(buffer), sizeof(buffer)))
+        slen = strlen(buffer);
+        if (!WS_inet_ntop(WS_AF_INET6, &sockaddr6->sin6_addr, &buffer[slen], sizeof(buffer) - slen))
         {
             SetLastError(WSAEINVAL);
             return SOCKET_ERROR;