nes-proj/tools/sky/uip6-bridge/fakeuip.c

137 lines
3.2 KiB
C
Raw Normal View History

/* Various stub functions and uIP variables other code might need to
* compile. Allows you to save needing to compile all of uIP in just
* to get a few things */
2017-09-22 13:06:44 +00:00
#include "net/ipv6/uip.h"
#include "net/ipv6/uip-ds6.h"
#include <string.h>
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
2010-05-24 11:10:51 +00:00
uip_buf_t uip_aligned_buf;
uint16_t uip_len;
struct uip_stats uip_stat;
uip_lladdr_t uip_lladdr;
uint16_t uip_htons(uint16_t val) { return UIP_HTONS(val);}
2010-03-19 12:58:17 +00:00
uip_ds6_netif_t uip_ds6_if;
2010-03-19 12:58:17 +00:00
/********** UIP_DS6.c **********/
void
2010-03-19 12:58:17 +00:00
uip_ds6_set_addr_iid(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr)
{
/* We consider only links with IEEE EUI-64 identifier or
IEEE 48-bit MAC addresses */
#if (UIP_LLADDR_LEN == 8)
memcpy(ipaddr->u8 + 8, lladdr, UIP_LLADDR_LEN);
ipaddr->u8[8] ^= 0x02;
#elif (UIP_LLADDR_LEN == 6)
memcpy(ipaddr->u8 + 8, lladdr, 3);
ipaddr->u8[11] = 0xff;
ipaddr->u8[12] = 0xfe;
memcpy(ipaddr->u8 + 13, lladdr + 3, 3);
ipaddr->u8[8] ^= 0x02;
#else
2010-03-19 12:58:17 +00:00
#error fakeuip.c cannot build interface address when UIP_LLADDR_LEN is not 6 or 8
#endif
}
2010-05-24 11:10:51 +00:00
/*---------------------------------------------------------------------------*/
/*
* get a link local address -
* state = -1 => any address is ok. Otherwise state = desired state of addr.
* (TENTATIVE, PREFERRED, DEPRECATED)
*/
uip_ds6_addr_t *
uip_ds6_get_link_local(int8_t state) {
uip_ds6_addr_t *locaddr;
for(locaddr = uip_ds6_if.addr_list;
locaddr < uip_ds6_if.addr_list + UIP_DS6_ADDR_NB; locaddr++) {
if((locaddr->isused) && (state == - 1 || locaddr->state == state)
&& (uip_is_addr_linklocal(&locaddr->ipaddr))) {
2010-05-24 11:10:51 +00:00
return locaddr;
}
}
return NULL;
}
2010-03-19 12:58:17 +00:00
uip_ds6_addr_t *
uip_ds6_addr_add(uip_ipaddr_t *ipaddr, unsigned long vlifetime, uint8_t type)
{
2010-03-19 12:58:17 +00:00
return NULL;
}
/********** UIP.c ****************/
static uint16_t
chksum(uint16_t sum, const uint8_t *data, uint16_t len)
{
uint16_t t;
const uint8_t *dataptr;
const uint8_t *last_byte;
dataptr = data;
last_byte = data + len - 1;
while(dataptr < last_byte) { /* At least two more bytes */
t = (dataptr[0] << 8) + dataptr[1];
sum += t;
if(sum < t) {
sum++; /* carry */
}
dataptr += 2;
}
if(dataptr == last_byte) {
t = (dataptr[0] << 8) + 0;
sum += t;
if(sum < t) {
sum++; /* carry */
}
}
/* Return sum in host byte order. */
return sum;
}
static uint16_t
upper_layer_chksum(uint8_t proto)
{
uint16_t upper_layer_len;
uint16_t sum;
upper_layer_len = (((uint16_t)(UIP_IP_BUF->len[0]) << 8) + UIP_IP_BUF->len[1]) ;
/* First sum pseudoheader. */
/* IP protocol and length fields. This addition cannot carry. */
sum = upper_layer_len + proto;
/* Sum IP source and destination addresses. */
sum = chksum(sum, (uint8_t *)&UIP_IP_BUF->srcipaddr, 2 * sizeof(uip_ipaddr_t));
/* Sum TCP header and data. */
sum = chksum(sum, &uip_buf[UIP_IPH_LEN + UIP_LLH_LEN],
upper_layer_len);
return (sum == 0) ? 0xffff : uip_htons(sum);
}
/*---------------------------------------------------------------------------*/
uint16_t
uip_icmp6chksum(void)
{
return upper_layer_chksum(UIP_PROTO_ICMP6);
}
/*---------------------------------------------------------------------------*/
void
uip_ds6_link_callback(int status, int numtx)
{
}