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RA managed-bit and use-SLAAC bit tweaks.

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This commit is contained in:
Simon Kelley
2012-03-20 16:20:22 +00:00
parent 0068301d24
commit 884a6dfe6d
3 changed files with 32 additions and 28 deletions
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16
src/radv.c
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@@ -206,7 +206,7 @@ static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
ra->type = ND_ROUTER_ADVERT;
ra->code = 0;
ra->hop_limit = hop_limit;
ra->flags = 0;
ra->flags = 0x00;
ra->lifetime = htons(1800); /* AdvDefaultLifetime*/
ra->reachable_time = 0;
ra->retrans_time = 0;
@@ -246,7 +246,7 @@ static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
/* set managed bits unless we're providing only RA on this link */
if (parm.managed)
ra->flags = 0xc0;
ra->flags = 0xc0; /* M flag, managed, O flag, other */
/* decide where we're sending */
memset(&addr, 0, sizeof(addr));
@@ -293,7 +293,11 @@ static int add_prefixes(struct in6_addr *local, int prefix,
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))
{
if (!(context->flags & CONTEXT_RA_ONLY))
int do_slaac = 0;
if (context->flags & CONTEXT_RA_ONLY)
do_slaac = 1;
else
{
/* don't do RA for non-ra-only unless --enable-ra is set */
if (!option_bool(OPT_RA))
@@ -317,6 +321,10 @@ static int add_prefixes(struct in6_addr *local, int prefix,
is_same_net6(local, &tmp->start6, prefix) &&
is_same_net6(local, &tmp->end6, prefix))
{
/* if any dhcp-range with ra-only on this subnet
set the "do_slaac" bit */
if (tmp->flags & CONTEXT_RA_ONLY)
do_slaac = 1;
tmp->flags |= CONTEXT_RA_DONE;
context->ra_time = 0;
}
@@ -335,7 +343,7 @@ static int add_prefixes(struct in6_addr *local, int prefix,
opt->len = 4;
opt->prefix_len = prefix;
/* autonomous only is we're not doing dhcp */
opt->flags = (context->flags & CONTEXT_RA_ONLY) ? 0xc0 : 0x00;
opt->flags = do_slaac ? 0x40 : 0x00;
opt->valid_lifetime = opt->preferred_lifetime = htonl(time);
opt->reserved = 0;