On 28 October 2015 at 19:13, Laurent Vivier <laur...@vivier.eu> wrote:
> This is obsolete, but if we want to use dhcp with an old distro (like debian
> etch), we need it. Some users (like dhclient) use SOCK_PACKET with AF_PACKET
> and the kernel allows that.
>
> packet(7)
>
> In Linux 2.0, the only way to get a packet socket was by calling
> socket(AF_INET, SOCK_PACKET, protocol). This is still supported but
> strongly deprecated. The main difference between the two methods is
> that SOCK_PACKET uses the old struct sockaddr_pkt to specify an inter‐
> face, which doesn't provide physical layer independence.
>
> struct sockaddr_pkt {
> unsigned short spkt_family;
> unsigned char spkt_device[14];
> unsigned short spkt_protocol;
> };
>
> spkt_family contains the device type, spkt_protocol is the IEEE 802.3
> protocol type as defined in <sys/if_ether.h> and spkt_device is the
> device name as a null-terminated string, for example, eth0.
>
> Signed-off-by: Laurent Vivier <laur...@vivier.eu>
> ---
> linux-user/syscall.c | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 31b5c2c..f048437 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -2086,6 +2086,30 @@ static int sock_flags_fixup(int fd, int target_type)
> return fd;
> }
>
> +static abi_long packet_target_to_host_addr(void *host_addr,
> + abi_ulong target_addr,
> + socklen_t len)
Should the function name be ..._to_host_sockaddr ?
Otherwise,
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
thanks
-- PMM
