config: set RFC defaults for preferred lifetime

Update preferred lifetime default value in accordance with RFC4861.

Signed-off-by: Paul Donald <newtwen@gmail.com>
[ fix comment style ]
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

diff --git a/README b/README
index 243ae2477936c562ac2da969aca735c3bc595f1e..c8f2eb4234abe2628dba240f844fdb4a0db07dd5 100644 (file)
--- a/README
+++ b/README
@@ -116,7 +116,7 @@ domain                      list    <local search domain>   Search domains to announce
 leasetime              string  12h                     DHCPv4 address leasetime
 start                  integer 100                     DHCPv4 pool start
 limit                  integer 150                     DHCPv4 pool size
-preferred_lifetime     string  12h                     Value for the preferred lifetime
+preferred_lifetime     string  7d                      Value for the preferred lifetime
                                                        for a prefix
 ra_default             integer 0                       Override default route
                        0: default, 1: ignore no public address, 2: ignore all

diff --git a/src/config.c b/src/config.c
index 7fe31a14fed039b1580d78e812e15a577fd1b602..62d4857720aba118dd1260f53bbc4b5f5c7ac53c 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -215,7 +215,7 @@ static void set_interface_defaults(struct interface *iface)
        iface->ndp = MODE_DISABLED;
        iface->learn_routes = 1;
        iface->dhcp_leasetime = 43200;
-       iface->preferred_lifetime = 43200;
+       iface->preferred_lifetime = 604800; /* rfc4861#section-6.2.1: AdvPreferredLifetime 7 days */
        iface->dhcpv4_start.s_addr = htonl(START_DEFAULT);
        iface->dhcpv4_end.s_addr = htonl(START_DEFAULT + LIMIT_DEFAULT - 1);
        iface->dhcpv6_assignall = true;