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