Acked-by: Sairam Venugopal <[email protected]>

On 12/13/16, 10:52 AM, "Alin Serdean" <[email protected]>
wrote:

>Checking for ERROR_INSUFFICIENT_BUFFER is incorrect per
>MSFT documentation:
>https://urldefense.proofpoint.com/v2/url?u=https-3A__msdn.microsoft.com_en
>-2Dus_library_windows_desktop_aa365915-28v-3Dvs.85-29.aspx&d=DgICAg&c=uila
>K90D4TOVoH58JNXRgQ&r=Z6vowHUOjP5ysP_g372c49Nqc1vEKqHKNBkR5Q5Z7uo&m=saWOLiw
>2hhYRR-nDW2OSb-CDDqaeeOHF6HqdETLEQp4&s=w-oSMEuJM9I1cw5cvsjHBLFkuttr6pX_7eV
>dLs-wM_8&e= 
>
>Also, the initial call to GetAdaptersAddresses was wrong. In the case
>of a successful return 'all_addr' was not allocated leading to a crash.
>
>Signed-off-by: Alin Gabriel Serdean <[email protected]>
>Reported-by: Lior Baram <[email protected]>
>---
> lib/netdev-windows.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
>diff --git a/lib/netdev-windows.c b/lib/netdev-windows.c
>index f5e809e..c2fbe42 100644
>--- a/lib/netdev-windows.c
>+++ b/lib/netdev-windows.c
>@@ -425,16 +425,16 @@ netdev_windows_get_next_hop(const struct in_addr
>*host,
> {
>     uint32_t ret_val = 0;
>     /* The buffer length of all addresses */
>-    uint32_t buffer_length = 1000;
>+    uint32_t buffer_length = 0;
>     PIP_ADAPTER_ADDRESSES all_addr = NULL;
>     PIP_ADAPTER_ADDRESSES cur_addr = NULL;
> 
>     ret_val = GetAdaptersAddresses(AF_INET,
>                                    GAA_FLAG_INCLUDE_PREFIX |
>                                    GAA_FLAG_INCLUDE_GATEWAYS,
>-                                   NULL, all_addr, &buffer_length);
>+                                   NULL, NULL, &buffer_length);
> 
>-    if (ret_val != ERROR_INSUFFICIENT_BUFFER ) {
>+    if (ret_val != ERROR_BUFFER_OVERFLOW ) {
>         VLOG_ERR("Call to GetAdaptersAddresses failed with error: %s",
>                  ovs_format_message(ret_val));
>         return ENXIO;
>-- 
>2.10.2.windows.1
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