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Allow router advertisements to have the "off-link" bit set.

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This commit is contained in:
Neil Jerram
2015-06-10 22:13:06 +01:00
committed by Simon Kelley
parent 0ddb8769bb
commit 2fd5bc952d
3 changed files with 12 additions and 4 deletions
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13
src/radv.c
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@@ -313,8 +313,10 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
opt->type = ICMP6_OPT_PREFIX;
opt->len = 4;
opt->prefix_len = context->prefix;
/* autonomous only if we're not doing dhcp, always set "on-link" */
opt->flags = do_slaac ? 0xC0 : 0x80;
/* autonomous only if we're not doing dhcp, set
"on-link" unless "off-link" was specified */
opt->flags = (do_slaac ? 0x40 : 0) |
((context->flags & CONTEXT_RA_OFF_LINK) ? 0 : 0x80);
opt->valid_lifetime = htonl(context->saved_valid - old);
opt->preferred_lifetime = htonl(0);
opt->reserved = 0;
@@ -514,6 +516,7 @@ static int add_prefixes(struct in6_addr *local, int prefix,
int deprecate = 0;
int constructed = 0;
int adv_router = 0;
int off_link = 0;
unsigned int time = 0xffffffff;
struct dhcp_context *context;
@@ -586,6 +589,7 @@ static int add_prefixes(struct in6_addr *local, int prefix,
context->ra_time = 0;
context->flags |= CONTEXT_RA_DONE;
real_prefix = context->prefix;
off_link = (context->flags & CONTEXT_RA_OFF_LINK);
}
param->first = 0;
@@ -636,8 +640,9 @@ static int add_prefixes(struct in6_addr *local, int prefix,
opt->type = ICMP6_OPT_PREFIX;
opt->len = 4;
opt->prefix_len = real_prefix;
/* autonomous only if we're not doing dhcp, always set "on-link" */
opt->flags = 0x80;
/* autonomous only if we're not doing dhcp, set
"on-link" unless "off-link" was specified */
opt->flags = (off_link ? 0 : 0x80);
if (do_slaac)
opt->flags |= 0x40;
if (adv_router)