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authorHuw Davies <huw@codeweavers.com>2016-06-27 22:05:28 +0300
committerPaul Moore <paul@paul-moore.com>2016-06-27 22:05:28 +0300
commit56ac42bc94b18d45b6c484edeac33be86bfb3efa (patch)
treed14e433bcc0b3fef9349a86cbb6d8d87dedfb232 /net/dccp
parent1f440c99d3207d684a3ac48d6e528af548b5c915 (diff)
downloadlinux-56ac42bc94b18d45b6c484edeac33be86bfb3efa.tar.xz
ipv6: Allow request socks to contain IPv6 options.
If set, these will take precedence over the parent's options during both sending and child creation. If they're not set, the parent's options (if any) will be used. This is to allow the security_inet_conn_request() hook to modify the IPv6 options in just the same way that it already may do for IPv4. Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv6.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 4663a01d5039..3381748bd0f3 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -216,14 +216,17 @@ static int dccp_v6_send_response(const struct sock *sk, struct request_sock *req
skb = dccp_make_response(sk, dst, req);
if (skb != NULL) {
struct dccp_hdr *dh = dccp_hdr(skb);
+ struct ipv6_txoptions *opt;
dh->dccph_checksum = dccp_v6_csum_finish(skb,
&ireq->ir_v6_loc_addr,
&ireq->ir_v6_rmt_addr);
fl6.daddr = ireq->ir_v6_rmt_addr;
rcu_read_lock();
- err = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt),
- np->tclass);
+ opt = ireq->ipv6_opt;
+ if (!opt)
+ opt = rcu_dereference(np->opt);
+ err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
rcu_read_unlock();
err = net_xmit_eval(err);
}
@@ -236,6 +239,7 @@ done:
static void dccp_v6_reqsk_destructor(struct request_sock *req)
{
dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg);
+ kfree(inet_rsk(req)->ipv6_opt);
kfree_skb(inet_rsk(req)->pktopts);
}
@@ -494,7 +498,9 @@ static struct sock *dccp_v6_request_recv_sock(const struct sock *sk,
* Yes, keeping reference count would be much more clever, but we make
* one more one thing there: reattach optmem to newsk.
*/
- opt = rcu_dereference(np->opt);
+ opt = ireq->ipv6_opt;
+ if (!opt)
+ opt = rcu_dereference(np->opt);
if (opt) {
opt = ipv6_dup_options(newsk, opt);
RCU_INIT_POINTER(newnp->opt, opt);