void
print_ipv4(
int fd,
char *datagram)
{
struct ipv4_header *iph;
iph = (struct ipv4_header *) datagram;
print_proto(fd,"[IPv4/ version:%hhd ipheaderlen:%hhd tos:%#x totlen:%d "
"id:%#x fragoffset:%#x ttl:%hhu proto:%hhd checksum:%#x "
"source:%s dest:%s]",FLAG_VAL(iph->lenvers,IPV4_VERS,4),
FLAG_VAL(iph->lenvers,IPV4_HDRLEN,0),iph->tos,
ntohs(iph->totlen),ntohs(iph->id), ntohs(iph->fragoffset),
iph->ttl,iph->proto,ntohs(iph->ipchecksum),
ipv4_ntoa(ntohl(iph->sourceaddr),sourceip),
ipv4_ntoa(ntohl(iph->destaddr), destip));
}
int int_polling()
{
if(cpu.INTR & FLAG_VAL(IF)) {
uint32_t intr_no = i8259_query_intr();
i8259_ack_intr();
raise_intr(intr_no);
return 0;
}
return 1;
}
void
scan_ipv4(
struct data *datagram,
struct protocol_header *network_layerph,
struct protocol_header *transport_layerph)
{
network_layerph->len =
(FLAG_VAL(((struct ipv4_header *)network_layerph->header)
->lenvers,IPV4_HDRLEN,0) * 4);
transport_layerph->id =
((struct ipv4_header *)network_layerph->header)->proto;
}
