67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
#include <grub/net.h>
|
|
#include <grub/net/udp.h>
|
|
#include <grub/net/ip.h>
|
|
#include <grub/net/netbuff.h>
|
|
#include <grub/time.h>
|
|
|
|
grub_err_t
|
|
grub_net_send_udp_packet (const grub_net_network_level_address_t *target,
|
|
struct grub_net_buff *nb, grub_uint16_t srcport,
|
|
grub_uint16_t destport)
|
|
{
|
|
struct udphdr *udph;
|
|
struct grub_net_network_level_interface *inf;
|
|
grub_err_t err;
|
|
grub_net_network_level_address_t gateway;
|
|
|
|
err = grub_net_route_address (*target, &gateway, &inf);
|
|
if (err)
|
|
return err;
|
|
|
|
grub_netbuff_push (nb,sizeof(*udph));
|
|
|
|
udph = (struct udphdr *) nb->data;
|
|
udph->src = grub_cpu_to_be16 (srcport);
|
|
udph->dst = grub_cpu_to_be16 (destport);
|
|
|
|
/* No chechksum. */
|
|
udph->chksum = 0;
|
|
udph->len = grub_cpu_to_be16 (nb->tail - nb->data);
|
|
|
|
return grub_net_send_ip_packet (inf, target, nb);
|
|
}
|
|
|
|
grub_err_t
|
|
grub_net_recv_udp_packet (const grub_net_network_level_address_t *target,
|
|
struct grub_net_buff *buf,
|
|
grub_uint16_t srcport, grub_uint16_t destport)
|
|
{
|
|
grub_err_t err;
|
|
struct grub_net_packet *pkt;
|
|
struct grub_net_network_level_interface *inf;
|
|
grub_net_network_level_address_t gateway;
|
|
|
|
err = grub_net_route_address (*target, &gateway, &inf);
|
|
if (err)
|
|
return err;
|
|
|
|
(void) srcport;
|
|
|
|
err = grub_net_recv_ip_packets (inf);
|
|
|
|
FOR_NET_NL_PACKETS(inf, pkt)
|
|
{
|
|
struct udphdr *udph;
|
|
struct grub_net_buff *nb = pkt->nb;
|
|
udph = (struct udphdr *) nb->data;
|
|
if (grub_be_to_cpu16 (udph->dst) == destport)
|
|
{
|
|
grub_net_remove_packet (pkt);
|
|
grub_netbuff_pull (nb, sizeof(*udph));
|
|
grub_memcpy (buf, nb, sizeof (buf));
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
}
|
|
return GRUB_ERR_NONE;
|
|
}
|