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DHCPv6 address allocation - same DUID, two IAIDs

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This commit is contained in:
Simon Kelley
2013-01-09 19:51:04 +00:00
parent 71c73ac17c
commit 37c9ccebd1
3 changed files with 49 additions and 32 deletions
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40
src/rfc3315.c
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@@ -525,32 +525,38 @@ static int dhcp6_no_relay(int msg_type, struct in6_addr *link_address, struct dh
{
struct in6_addr *req_addr = opt6_ptr(ia_option, 0);
requested_time = opt6_uint(ia_option, 16, 4);
if (!address6_available(context, req_addr, tags) &&
(!have_config(config, CONFIG_ADDR6) || memcmp(&config->addr6, req_addr, IN6ADDRSZ) != 0))
struct dhcp_context *dynamic;
if ((dynamic = address6_available(context, req_addr, tags)) || address6_valid(context, req_addr, tags))
{
if (msg_type == DHCP6REQUEST)
if (!dynamic && !(have_config(config, CONFIG_ADDR6) && memcmp(&config->addr6, req_addr, IN6ADDRSZ) == 0))
{
/* host has a lease, but it's not on the correct link */
/* Static range, not configured. */
o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6NOTONLINK);
put_opt6_string("Not on link");
put_opt6_short(DHCP6UNSPEC);
put_opt6_string("Address unavailable");
end_opt6(o1);
}
else if (lease6_find_by_addr(req_addr, 128, 0) &&
!(lease = lease6_find(clid, clid_len, ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA, iaid, req_addr)))
{
/* Address leased to another DUID/IAID */
o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6UNSPEC);
put_opt6_string("Address in use");
end_opt6(o1);
}
else
addrp = req_addr;
}
else if ((lease = lease6_find(NULL, 0, ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,
iaid, req_addr)) &&
(clid_len != lease->clid_len ||
memcmp(clid, lease->clid, clid_len) != 0))
else if (msg_type == DHCP6REQUEST)
{
/* Address leased to another DUID */
/* requested address not on the correct link */
o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6UNSPEC);
put_opt6_string("Address in use");
put_opt6_short(DHCP6NOTONLINK);
put_opt6_string("Not on link");
end_opt6(o1);
}
else
addrp = req_addr;
}
}
else
{