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Allow modification of IP64 prefix

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This commit is contained in:
Laurent Deru 2016-03-11 11:45:31 +01:00
parent 10be59cc15
commit e5a604552e
2 changed files with 22 additions and 29 deletions
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48
core/net/ip/ip64-addr.c
View file

@ -35,6 +35,10 @@
#include <string.h>
#define printf(...)
static uip_ip6addr_t ip64_prefix = {{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 0, 0, 0}};
static uint8_t ip64_prefix_len = 96;
/*---------------------------------------------------------------------------*/
void
ip64_addr_copy4(uip_ip4addr_t *dest, const uip_ip4addr_t *src)
@ -56,20 +60,7 @@ ip64_addr_4to6(const uip_ip4addr_t *ipv4addr,
addresses. It returns 0 if it failed to convert the address and
non-zero if it could successfully convert the address. */
/* The IPv4 address is encoded as an IPv6-encoded IPv4 address in
the ::ffff:0000/24 prefix.*/
ipv6addr->u8[0] = 0;
ipv6addr->u8[1] = 0;
ipv6addr->u8[2] = 0;
ipv6addr->u8[3] = 0;
ipv6addr->u8[4] = 0;
ipv6addr->u8[5] = 0;
ipv6addr->u8[6] = 0;
ipv6addr->u8[7] = 0;
ipv6addr->u8[8] = 0;
ipv6addr->u8[9] = 0;
ipv6addr->u8[10] = 0xff;
ipv6addr->u8[11] = 0xff;
uip_ipaddr_copy(ipv6addr, &ip64_prefix);
ipv6addr->u8[12] = ipv4addr->u8[0];
ipv6addr->u8[13] = ipv4addr->u8[1];
ipv6addr->u8[14] = ipv4addr->u8[2];
@ -90,21 +81,7 @@ ip64_addr_6to4(const uip_ip6addr_t *ipv6addr,
returns 0 if it failed to convert the address and non-zero if it
could successfully convert the address. */
/* If the IPv6 address is an IPv6-encoded
IPv4 address (i.e. in the ::ffff:0/8 prefix), we simply use the
IPv4 addresses directly. */
if(ipv6addr->u8[0] == 0 &&
ipv6addr->u8[1] == 0 &&
ipv6addr->u8[2] == 0 &&
ipv6addr->u8[3] == 0 &&
ipv6addr->u8[4] == 0 &&
ipv6addr->u8[5] == 0 &&
ipv6addr->u8[6] == 0 &&
ipv6addr->u8[7] == 0 &&
ipv6addr->u8[8] == 0 &&
ipv6addr->u8[9] == 0 &&
ipv6addr->u8[10] == 0xff &&
ipv6addr->u8[11] == 0xff) {
if(ip64_addr_is_ip64(ipv6addr)) {
ipv4addr->u8[0] = ipv6addr->u8[12];
ipv4addr->u8[1] = ipv6addr->u8[13];
ipv4addr->u8[2] = ipv6addr->u8[14];
@ -121,3 +98,16 @@ ip64_addr_6to4(const uip_ip6addr_t *ipv6addr,
return 0;
}
/*---------------------------------------------------------------------------*/
int
ip64_addr_is_ip64(const uip_ip6addr_t *ipv6addr)
{
return uip_ipaddr_prefixcmp(ipv6addr, &ip64_prefix, ip64_prefix_len);
}
/*---------------------------------------------------------------------------*/
void
ip64_addr_set_prefix(const uip_ip6addr_t *prefix, uint8_t prefix_len)
{
uip_ipaddr_copy(&ip64_prefix, prefix);
ip64_prefix_len = prefix_len;
}
/*---------------------------------------------------------------------------*/

3
core/net/ip/ip64-addr.h
View file

@ -58,6 +58,9 @@ int ip64_addr_6to4(const uip_ip6addr_t *ipv6addr,
int ip64_addr_4to6(const uip_ip4addr_t *ipv4addr,
uip_ip6addr_t *ipv6addr);
int ip64_addr_is_ip64(const uip_ip6addr_t *ipv6addr);
void ip64_addr_set_prefix(const uip_ip6addr_t *prefix, uint8_t prefix_len);
#endif /* IP64_ADDR_H */