ipv6 bridge between 802.15.4 and ethernet - over USB/SLIP - use with sliptap6

tools/sky/uip6-bridge/fakeuip.c

@@ -0,0 +1,108 @@
+
+/* 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 "net/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;
+
+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);
+}