Commit 784d4477 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

ipv6: icmp6: add SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS

This is a generic drop reason for any error detected
in ndisc_parse_options().
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ec993edf
......@@ -76,6 +76,7 @@
FN(IPV6_NDISC_FRAG) \
FN(IPV6_NDISC_HOP_LIMIT) \
FN(IPV6_NDISC_BAD_CODE) \
FN(IPV6_NDISC_BAD_OPTIONS) \
FNe(MAX)
/**
......@@ -330,6 +331,8 @@ enum skb_drop_reason {
SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT,
/** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */
SKB_DROP_REASON_IPV6_NDISC_BAD_CODE,
/** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */
SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS,
/**
* @SKB_DROP_REASON_MAX: the maximum of drop reason, which shouldn't be
* used as a real 'reason'
......
......@@ -819,10 +819,8 @@ static enum skb_drop_reason ndisc_recv_ns(struct sk_buff *skb)
return reason;
}
if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) {
ND_PRINTK(2, warn, "NS: invalid ND options\n");
return reason;
}
if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts))
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (ndopts.nd_opts_src_lladdr) {
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr, dev);
......@@ -1026,10 +1024,9 @@ static enum skb_drop_reason ndisc_recv_na(struct sk_buff *skb)
idev->cnf.drop_unsolicited_na)
return reason;
if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) {
ND_PRINTK(2, warn, "NS: invalid ND option\n");
return reason;
}
if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts))
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (ndopts.nd_opts_tgt_lladdr) {
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, dev);
if (!lladdr) {
......@@ -1159,10 +1156,8 @@ static enum skb_drop_reason ndisc_recv_rs(struct sk_buff *skb)
goto out;
/* Parse ND options */
if (!ndisc_parse_options(skb->dev, rs_msg->opt, ndoptlen, &ndopts)) {
ND_PRINTK(2, notice, "NS: invalid ND option, ignored\n");
goto out;
}
if (!ndisc_parse_options(skb->dev, rs_msg->opt, ndoptlen, &ndopts))
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (ndopts.nd_opts_src_lladdr) {
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr,
......@@ -1280,10 +1275,8 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
return reason;
}
if (!ndisc_parse_options(skb->dev, opt, optlen, &ndopts)) {
ND_PRINTK(2, warn, "RA: invalid ND options\n");
return reason;
}
if (!ndisc_parse_options(skb->dev, opt, optlen, &ndopts))
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (!ipv6_accept_ra(in6_dev)) {
ND_PRINTK(2, info,
......@@ -1627,7 +1620,7 @@ static enum skb_drop_reason ndisc_redirect_rcv(struct sk_buff *skb)
}
if (!ndisc_parse_options(skb->dev, msg->opt, ndoptlen, &ndopts))
return reason;
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (!ndopts.nd_opts_rh) {
ip6_redirect_no_header(skb, dev_net(skb->dev),
......
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