111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
|
|
/* 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 */
|
|
|
|
|
|
#include "uip.h"
|
|
#include <string.h>
|
|
|
|
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
|
|
|
|
u8_t uip_buf[UIP_BUFSIZE + 2];
|
|
|
|
u16_t uip_len;
|
|
|
|
struct uip_stats uip_stat;
|
|
|
|
uip_lladdr_t uip_lladdr;
|
|
|
|
u8_t (* tcpip_output)(uip_lladdr_t *);
|
|
|
|
u16_t htons(u16_t val) { return HTONS(val);}
|
|
|
|
|
|
/********** UIP_NETIF.c **********/
|
|
|
|
void
|
|
uip_netif_addr_autoconf_set(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
|
|
/*
|
|
UIP_LOG("CAN NOT BUIL INTERFACE IDENTIFIER");
|
|
UIP_LOG("THE STACK IS GOING TO SHUT DOWN");
|
|
UIP_LOG("THE HOST WILL BE UNREACHABLE");
|
|
*/
|
|
exit(-1);
|
|
#endif
|
|
}
|
|
|
|
/********** UIP.c ****************/
|
|
|
|
static u16_t
|
|
chksum(u16_t sum, const u8_t *data, u16_t len)
|
|
{
|
|
u16_t t;
|
|
const u8_t *dataptr;
|
|
const u8_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 u16_t
|
|
upper_layer_chksum(u8_t proto)
|
|
{
|
|
u16_t upper_layer_len;
|
|
u16_t sum;
|
|
|
|
upper_layer_len = (((u16_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, (u8_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 : htons(sum);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
u16_t
|
|
uip_icmp6chksum(void)
|
|
{
|
|
return upper_layer_chksum(UIP_PROTO_ICMP6);
|
|
}
|