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finetune the RA parsing procedure

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Signed-off-by: luojun1 <luojun1@xiaomi.com>
Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
luojun1 2022-07-28 21:53:58 +08:00 committed by Petro Karashchenko
parent 423ee67554
commit 7c2986bb34
1 changed files with 35 additions and 17 deletions
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52
net/icmpv6/icmpv6_input.c
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@ -369,29 +369,47 @@ void icmpv6_input(FAR struct net_driver_s *dev, unsigned int iplen)
for (ndx = 0; ndx + sizeof(struct icmpv6_prefixinfo_s) <= optlen; )
{
FAR struct icmpv6_srclladdr_s *sllopt =
(FAR struct icmpv6_srclladdr_s *)&options[ndx];
FAR struct icmpv6_generic_s *opt =
(FAR struct icmpv6_generic_s *)&options[ndx];
if (sllopt->opttype == ICMPv6_OPT_SRCLLADDR)
switch (opt->opttype)
{
neighbor_add(dev, ipv6->srcipaddr, sllopt->srclladdr);
}
case ICMPv6_OPT_SRCLLADDR:
{
FAR struct icmpv6_srclladdr_s *sllopt =
(FAR struct icmpv6_srclladdr_s *)opt;
neighbor_add(dev, ipv6->srcipaddr, sllopt->srclladdr);
}
break;
FAR struct icmpv6_prefixinfo_s *opt =
(FAR struct icmpv6_prefixinfo_s *)&options[ndx];
case ICMPv6_OPT_PREFIX:
{
FAR struct icmpv6_prefixinfo_s *prefixopt =
(FAR struct icmpv6_prefixinfo_s *)opt;
/* Is this the sought for prefix? Is it the correct size? Is
* the "A" flag set?
*/
/* Is the "A" flag set? */
if (opt->opttype == ICMPv6_OPT_PREFIX &&
(opt->flags & ICMPv6_PRFX_FLAG_A) != 0)
{
/* Yes.. Notify any waiting threads */
if ((prefixopt->flags & ICMPv6_PRFX_FLAG_A) != 0)
{
/* Notify any waiting threads */
icmpv6_rnotify(dev, ipv6->srcipaddr,
opt->prefix, opt->preflen);
prefix = true;
icmpv6_rnotify(dev, ipv6->srcipaddr,
prefixopt->prefix, prefixopt->preflen);
prefix = true;
}
}
break;
case ICMPv6_OPT_MTU:
{
FAR struct icmpv6_mtu_s *mtuopt =
(FAR struct icmpv6_mtu_s *)opt;
dev->d_pktsize = mtuopt->mtu;
}
break;
default:
break;
}
/* Skip to the next option (units of octets) */