From 709d6710d047566c71f03e579a02c3d99fe15a3e Mon Sep 17 00:00:00 2001 From: Patrik Flykt Date: Wed, 25 Jun 2014 15:37:58 +0300 Subject: sd-dhcp6-lease: Add helper function to compute remaining expiry time Create a helper function to compute the remaining time in seconds from time T2 to the IPv6 address with the longest lifetime. The computed time is used as the Maximum Retransmission Duration in Rebinding state. See RFC 3315, section 18.1.4. for details. --- src/libsystemd-network/sd-dhcp6-lease.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'src/libsystemd-network/sd-dhcp6-lease.c') diff --git a/src/libsystemd-network/sd-dhcp6-lease.c b/src/libsystemd-network/sd-dhcp6-lease.c index cbda7d8c84..17a4b64063 100644 --- a/src/libsystemd-network/sd-dhcp6-lease.c +++ b/src/libsystemd-network/sd-dhcp6-lease.c @@ -33,6 +33,28 @@ int dhcp6_lease_clear_timers(DHCP6IA *ia) { return 0; } +int dhcp6_lease_ia_rebind_expire(const DHCP6IA *ia, uint32_t *expire) { + DHCP6Address *addr; + uint32_t valid = 0, t; + + assert_return(ia, -EINVAL); + assert_return(expire, -EINVAL); + + LIST_FOREACH(addresses, addr, ia->addresses) { + t = be32toh(addr->lifetime_valid); + if (valid < t) + valid = t; + } + + t = be32toh(ia->lifetime_t2); + if (t > valid) + return -EINVAL; + + *expire = valid - t; + + return 0; +} + DHCP6IA *dhcp6_lease_free_ia(DHCP6IA *ia) { DHCP6Address *address; -- cgit v1.2.3-54-g00ecf