103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
#include <grub/net/udp.h>
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#include <grub/net/ip.h>
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#include <grub/net/type_net.h>
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#include <grub/net/netbuff.h>
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#include <grub/net/protocol.h>
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#include <grub/net/interface.h>
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static grub_err_t
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send_udp_packet (struct grub_net_network_layer_interface *inf,
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struct grub_net_application_transport_interface *app_trans_inf, struct grub_net_buff *nb)
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{
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struct udphdr *udph;
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struct udp_interf *udp_interf;
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grub_netbuff_push (nb,sizeof(*udph));
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udph = (struct udphdr *) nb->data;
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udp_interf = (struct udp_interf *) app_trans_inf->data;
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udph->src = udp_interf->src;
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udph->dst = udp_interf->dst;
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/*no chksum*/
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udph->chksum = 0;
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udph->len = nb->tail - nb->data;
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return app_trans_inf->inner_layer->net_prot->send(inf,app_trans_inf->inner_layer,nb);
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}
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static grub_err_t
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receive_udp_packet (struct grub_net_network_layer_interface *inf,
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struct grub_net_application_transport_interface *app_trans_inf, struct grub_net_buff *nb)
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{
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struct udphdr *udph;
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struct udp_interf *udp_interf;
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udp_interf = (struct udp_interf *) app_trans_inf->data;
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while(1)
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{
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app_trans_inf->inner_layer->net_prot->recv(inf,app_trans_inf->inner_layer,nb);
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udph = (struct udphdr *) nb->data;
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// grub_printf("udph->dst %d\n",udph->dst);
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// grub_printf("udp_interf->src %d\n",udp_interf->src);
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if (udph->dst == udp_interf->src)
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{
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grub_netbuff_pull (nb,sizeof(*udph));
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// udp_interf->src = udph->dst;
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udp_interf->dst = udph->src;
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// grub_printf("udph->dst %d\n",udph->dst);
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// grub_printf("udph->src %d\n",udph->src);
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// grub_printf("udph->len %d\n",udph->len);
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// grub_printf("udph->chksum %x\n",udph->chksum);
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/* - get udp header..
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- verify if is in the desired port
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- if not. get another packet
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- remove udp header*/
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return 0;
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}
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}
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}
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static struct grub_net_transport_layer_protocol grub_udp_protocol =
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{
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.name = "udp",
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.id = GRUB_NET_UDP_ID,
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.send = send_udp_packet,
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.recv = receive_udp_packet
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};
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void udp_ini(void)
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{
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grub_net_transport_layer_protocol_register (&grub_udp_protocol);
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}
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void udp_fini(void)
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{
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grub_net_transport_layer_protocol_unregister (&grub_udp_protocol);
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}
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/*
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int read_udp_packet (grub_uint16_t port,void *buffer,int *buff_len)
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{
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struct udphdr udph;
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udph.dst = 0;
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while ( udph.dst != port)
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{
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read_ip_packet (buffer,bufflen);
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grub_memcpy (&udph,buffer,sizeof (udph));
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}
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buffer += sizeof (udph);
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*buff_len -= sizeof (udph);
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}*/
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