nes-proj/platform/avr-ravenusb/fakeuip.c

127 lines
2.8 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])
uip_buf_t uip_aligned_buf;
u16_t uip_len;
struct uip_stats uip_stat;
uip_lladdr_t uip_lladdr;
static u8_t (* output)(uip_lladdr_t *);
u8_t tcpip_output(uip_lladdr_t * lladdr){
if(output != NULL) {
return output(lladdr);
}
return 0;
}
void tcpip_set_outputfunc(u8_t (* f)(uip_lladdr_t *)) {
output = f;
}
u16_t htons(u16_t val) { return HTONS(val);}
#if THEOLDWAY
/********** UIP_NETIF.c **********/
void
uip_netif_addr_autoconf_set(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr)
#else
/********** uip-ds6.c ************/
void
uip_ds6_set_addr_iid(uip_ipaddr_t * ipaddr, uip_lladdr_t * lladdr)
#endif /* THEOLDWAY */
{
/* 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
#error cannot build interface address when UIP_LLADDR_LEN is not 6 or 8
/*
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);
}