122 lines
3 KiB
C
122 lines
3 KiB
C
#include <grub/net/ip.h>
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#include <grub/net/ieee1275/interface.h>
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#include <grub/misc.h>
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#include <grub/net/ethernet.h>
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#include <grub/net/interface.h>
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#include <grub/net/type_net.h>
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#include <grub/net.h>
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#include <grub/net/netbuff.h>
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#include <grub/mm.h>
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struct grub_net_protocol *grub_ipv4_prot;
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grub_uint16_t
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ipchksum(void *ipv, int len)
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{
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grub_uint16_t *ip = (grub_uint16_t *)ipv;
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grub_uint32_t sum = 0;
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len >>= 1;
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while (len--) {
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sum += *(ip++);
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if (sum > 0xFFFF)
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sum -= 0xFFFF;
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}
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return((~sum) & 0x0000FFFF);
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}
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static grub_err_t
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send_ip_packet (struct grub_net_network_layer_interface *inf,
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struct grub_net_transport_network_interface *trans_net_inf, struct grub_net_buff *nb )
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{
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struct iphdr *iph;
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static int id = 0x2400;
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grub_netbuff_push(nb,sizeof(*iph));
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iph = (struct iphdr *) nb->data;
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/*FIXME dont work in litte endian machines*/
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//grub_uint8_t ver = 4;
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//grub_uint8_t hdrlen = sizeof (struct iphdr)/4;
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iph->verhdrlen = (4<<4 | 5);
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iph->service = 0;
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iph->len = nb->tail - nb-> data;//sizeof(*iph);
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iph->ident = ++id;
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iph->frags = 0;
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iph->ttl = 0xff;
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iph->protocol = 0x11;
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iph->src = (grub_uint32_t) bootp_pckt -> yiaddr; //inf->address.ipv4; // *((grub_uint32_t *)inf->card->ila->addr);
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iph->dest = (grub_uint32_t) bootp_pckt -> siaddr;//inf->address.ipv4;// *((grub_uint32_t *)inf->ila->addr);
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iph->chksum = 0 ;
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iph->chksum = ipchksum((void *)nb->data, sizeof(*iph));
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return trans_net_inf->inner_layer->link_prot->send(inf,trans_net_inf->inner_layer,nb);
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//return protstack->next->prot->send(inf,protstack->next,nb);
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}
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static grub_err_t
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recv_ip_packet (struct grub_net_network_layer_interface *inf,
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struct grub_net_transport_network_interface *trans_net_inf, struct grub_net_buff *nb )
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{
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struct iphdr *iph;
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while (1)
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{
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trans_net_inf->inner_layer->link_prot->recv(inf,trans_net_inf->inner_layer,nb);
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iph = (struct iphdr *) nb->data;
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if (iph->dest == 0x0908eaaa && iph->src == 0x0908ea92 && iph->protocol == 0x11)
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{
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grub_netbuff_pull(nb,sizeof(*iph));
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return 0;
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}
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}
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/* grub_printf("ip.src 0x%x\n",iph->src);
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grub_printf("ip.dst 0x%x\n",iph->dest);
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grub_printf("ip.len 0x%x\n",iph->len);
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grub_printf("ip.protocol 0x%x\n",iph->protocol);
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*/
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/* - get ip header
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- verify if is the next layer is correct
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-*/
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return 0;
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}
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static struct grub_net_network_layer_protocol grub_ipv4_protocol =
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{
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.name = "ipv4",
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.id = GRUB_NET_IPV4_ID,
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.send = send_ip_packet,
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.recv = recv_ip_packet
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};
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void ipv4_ini(void)
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{
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grub_net_network_layer_protocol_register (&grub_ipv4_protocol);
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}
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void ipv4_fini(void)
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{
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grub_net_network_layer_protocol_unregister (&grub_ipv4_protocol);
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}
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/*
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int read_ip_packet (void *buffer,int *bufflen)
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{
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struct iphdr iph;
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iph.protocol = 0;
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while ( iph.protocol != IP_UDP)
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{
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read_ethernet_packet(buffer,bufflen,IP_PROTOCOL);
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grub_memcpy (&iph,buffer,sizeof (iph));
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}
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buffer += sizeof (iph);
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*buff_len -= sizeof (iph);
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}*/
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