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#include "inet.h"
#include "net_sys.h"
#include "icmp.h"
#include "udp.h"
#include "ntp.h"
uint16_t ntohs(uint16_t val)
{
return val<<8|val>>8;
}
uint16_t htons(uint16_t val)
{
return val<<8|val>>8;
}
uint32_t ntohl(uint32_t val)
{
return val<<24|val>>24|((0x00ff0000&val)>>8)|((0x0000ff00&val)<<8);
}
uint16_t checksum(void *addr, int count)
{
/* Compute Internet Checksum for "count" bytes
* beginning at location "addr".
* Taken from https://tools.ietf.org/html/rfc1071
*/
register uint32_t sum = 0;
uint16_t * ptr = addr;
while( count > 1 ) {
/* This is the inner loop */
//sum += ntohs(* ptr++);
sum += *ptr++;
count -= 2;
}
/* Add left-over byte, if any */
if( count > 0 )
sum += * (uint8_t *) ptr;
/* Fold 32-bit sum to 16 bits */
while (sum>>16)
sum = (sum & 0xffff) + (sum >> 16);
return ~sum;
}
bool net_packet(struct netdev *dev)
{
uint32_t packet=kballoc(1);
packet+=4096; // we start one byte after the end;
//
uint32_t addr=(144)+(76<<8)+(106<<16)+(46<<24);
uint32_t google_time=216+(239<<8)+(35<<16)+(0<<24);
// this should of course be filled dynamically!
//uint32_t pos=icmp_ping(dev,addr,packet,packet); // create ping packet and get new position;
//uint32_t pos=udp_generic(dev, addr, 666, 123, packet,packet);
uint32_t pos=ntp_generic(dev, google_time, 6666, 123, packet,packet);
//
dev->transmit(pos,(packet-pos));
kbfree(packet-4096); // TODO: take care it is not overwritten before transmitted!
return true;
}
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