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network: Introduce method to generate EUI-64 addresses

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This commit is contained in:
Susant Sahani
2020-02-27 12:40:57 +01:00
committed by Yu Watanabe
parent c4ad7f83ec
commit 5ead535224
2 changed files with 20 additions and 0 deletions
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18
src/network/networkd-address.c
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@@ -20,6 +20,24 @@
#define ADDRESSES_PER_LINK_MAX 2048U
#define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
int generate_ipv6_eui_64_address(Link *link, struct in6_addr *ret) {
assert(link);
assert(ret);
/* see RFC4291 section 2.5.1 */
ret->s6_addr[8] = link->mac.ether_addr_octet[0];
ret->s6_addr[8] ^= 1 << 1;
ret->s6_addr[9] = link->mac.ether_addr_octet[1];
ret->s6_addr[10] = link->mac.ether_addr_octet[2];
ret->s6_addr[11] = 0xff;
ret->s6_addr[12] = 0xfe;
ret->s6_addr[13] = link->mac.ether_addr_octet[3];
ret->s6_addr[14] = link->mac.ether_addr_octet[4];
ret->s6_addr[15] = link->mac.ether_addr_octet[5];
return 0;
}
int address_new(Address **ret) {
_cleanup_(address_freep) Address *address = NULL;

2
src/network/networkd-address.h
View File

@@ -66,6 +66,8 @@ bool address_is_ready(const Address *a);
int address_section_verify(Address *a);
int configure_ipv4_duplicate_address_detection(Link *link, Address *address);
int generate_ipv6_eui_64_address(Link *link, struct in6_addr *ret);
DEFINE_NETWORK_SECTION_FUNCTIONS(Address, address_free);
extern const struct hash_ops address_hash_ops;