[PATCH 3/3] iphlpapi: Implement CancelIPChangeNotify.

[Hans Leidekker]

On Wed, 2013-05-08 at 15:34 -0600, Erich E. Hoover wrote:
> +#ifdef HAVE_LINUX_NETLINK_H
> +# include <linux/netlink.h>
> +#endif
> +#ifdef HAVE_LINUX_RTNETLINK_H
> +# include <linux/rtnetlink.h>
> +#endif
> +
> +#ifdef NLMSG_OK
> +# define WINE_LINKMON_FAMILY         PF_NETLINK
> +# define WINE_LINKMON_TYPE           SOCK_RAW
> +# define WINE_LINKMON_PROTO          NETLINK_ROUTE
> +# define WINE_LINKMON_ADDRCHANGE(b)  (NLMSG_OK((struct nlmsghdr*)b, len) \
> +             && (((struct nlmsghdr*)b)->nlmsg_type == RTM_NEWADDR \
> +                 || ((struct nlmsghdr*)b)->nlmsg_type == RTM_DELADDR))
> +#endif

I don't see the need for these defines. WINE_LINKMON_ADDRCHANGE could be turned
into a function.

> @@ -2043,12 +2100,79 @@ DWORD WINAPI IpRenewAddress(PIP_ADAPTER_INDEX_MAP AdapterInfo)
>   * FIXME
>   *  Stub, returns ERROR_NOT_SUPPORTED.
>   */
> -DWORD WINAPI NotifyAddrChange(PHANDLE Handle, LPOVERLAPPED overlapped)
> +DWORD WINAPI NotifyAddrChange(PHANDLE handle, LPOVERLAPPED overlapped)
>  {
> -  FIXME("(Handle %p, overlapped %p): stub\n", Handle, overlapped);
> -  if (Handle) *Handle = INVALID_HANDLE_VALUE;
> -  if (overlapped) ((IO_STATUS_BLOCK *) overlapped)->u.Status = STATUS_PENDING;
> -  return ERROR_IO_PENDING;
> +#ifdef WINE_LINKMON_FAMILY
> +    IO_STATUS_BLOCK *iosb = (IO_STATUS_BLOCK *) overlapped;
> +    struct sockaddr_nl addr;
> +    NTSTATUS status;
> +    int fd = -1;
> +    HANDLE h;
> +
> +    TRACE("(handle %p, overlapped %p): stub\n", handle, overlapped);
> +
> +    h = INVALID_HANDLE_VALUE;
> +    SERVER_START_REQ( create_socket )

Using a generic socket object might work I guess. The cost will be a new socket
per caller whereas in theory we could serve all callers with a single socket,
though that would require a dedicated server request. That might be needed anyway,
if this handle somehow turns out to be special.

I know MacOS has a similar socket based mechanism that could probably be handled
in the same way.