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[ipv6] Support stateless address autoconfiguration (SLAAC)

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-10-23 14:00:12 +01:00
parent 2dca2e6ade
commit 33652880a7
4 changed files with 237 additions and 72 deletions
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47
src/net/ipv6.c
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@@ -862,6 +862,53 @@ struct sockaddr_converter ipv6_sockaddr_converter __sockaddr_converter = {
.aton = ipv6_sock_aton,
};
/**
* Perform IPv6 stateless address autoconfiguration (SLAAC)
*
* @v netdev Network device
* @v prefix Prefix
* @v prefix_len Prefix length
* @v router Router address (or NULL)
* @ret rc Return status code
*/
int ipv6_slaac ( struct net_device *netdev, struct in6_addr *prefix,
unsigned int prefix_len, struct in6_addr *router ) {
struct ipv6_miniroute *miniroute;
struct ipv6_miniroute *tmp;
struct in6_addr address;
int check_prefix_len;
int rc;
/* Construct local address */
memcpy ( &address, prefix, sizeof ( address ) );
check_prefix_len = ipv6_eui64 ( &address, netdev );
if ( check_prefix_len < 0 ) {
rc = check_prefix_len;
DBGC ( netdev, "IPv6 %s could not construct SLAAC address: "
"%s\n", netdev->name, strerror ( rc ) );
return rc;
}
if ( check_prefix_len != ( int ) prefix_len ) {
DBGC ( netdev, "IPv6 %s incorrect SLAAC prefix length %d "
"(expected %d)\n", netdev->name, prefix_len,
check_prefix_len );
return -EINVAL;
}
/* Delete any existing SLAAC miniroutes for this prefix */
list_for_each_entry_safe ( miniroute, tmp, &ipv6_miniroutes, list ) {
if ( ipv6_is_local ( miniroute, &address ) )
del_ipv6_miniroute ( miniroute );
}
/* Add miniroute */
miniroute = add_ipv6_miniroute ( netdev, &address, prefix_len, router );
if ( ! miniroute )
return -ENOMEM;
return 0;
}
/**
* Create IPv6 network device
*