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authorAndrii <tulup@mail.ru>2017-08-31 08:28:01 +0300
committerDavid S. Miller <davem@davemloft.net>2017-08-31 11:43:47 -0700
commit323fbd0edf3ffe8d9d71a651c26b97a14a3c9d0e (patch)
tree54450238302d070616ab07d0c1151a54310f4a7d /net/dccp
parentbridge: add tracepoint in br_fdb_update (diff)
downloadlinux-dev-323fbd0edf3ffe8d9d71a651c26b97a14a3c9d0e.tar.xz
linux-dev-323fbd0edf3ffe8d9d71a651c26b97a14a3c9d0e.zip
net: dccp: Add handling of IPV6_PKTOPTIONS to dccp_v6_do_rcv()
Add handling of IPV6_PKTOPTIONS to dccp_v6_do_rcv() in net/dccp/ipv6.c, similar to the handling in net/ipv6/tcp_ipv6.c Signed-off-by: Andrii Vladyka <tulup@mail.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv6.c47
1 files changed, 35 insertions, 12 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 47a7b59b355e..5df7857fc0f3 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -16,6 +16,7 @@
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/xfrm.h>
+#include <linux/string.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
@@ -30,6 +31,7 @@
#include <net/ip6_checksum.h>
#include <net/xfrm.h>
#include <net/secure_seq.h>
+#include <net/sock.h>
#include "dccp.h"
#include "ipv6.h"
@@ -597,19 +599,13 @@ static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
--ANK (980728)
*/
if (np->rxopt.all)
- /*
- * FIXME: Add handling of IPV6_PKTOPTIONS skb. See the comments below
- * (wrt ipv6_pktopions) and net/ipv6/tcp_ipv6.c for an example.
- */
opt_skb = skb_clone(skb, GFP_ATOMIC);
if (sk->sk_state == DCCP_OPEN) { /* Fast path */
if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))
goto reset;
- if (opt_skb) {
- /* XXX This is where we would goto ipv6_pktoptions. */
- __kfree_skb(opt_skb);
- }
+ if (opt_skb)
+ goto ipv6_pktoptions;
return 0;
}
@@ -640,10 +636,8 @@ static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len))
goto reset;
- if (opt_skb) {
- /* XXX This is where we would goto ipv6_pktoptions. */
- __kfree_skb(opt_skb);
- }
+ if (opt_skb)
+ goto ipv6_pktoptions;
return 0;
reset:
@@ -653,6 +647,35 @@ discard:
__kfree_skb(opt_skb);
kfree_skb(skb);
return 0;
+
+/* Handling IPV6_PKTOPTIONS skb the similar
+ * way it's done for net/ipv6/tcp_ipv6.c
+ */
+ipv6_pktoptions:
+ if (!((1 << sk->sk_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) {
+ if (np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo)
+ np->mcast_oif = inet6_iif(opt_skb);
+ if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim)
+ np->mcast_hops = ipv6_hdr(opt_skb)->hop_limit;
+ if (np->rxopt.bits.rxflow || np->rxopt.bits.rxtclass)
+ np->rcv_flowinfo = ip6_flowinfo(ipv6_hdr(opt_skb));
+ if (np->repflow)
+ np->flow_label = ip6_flowlabel(ipv6_hdr(opt_skb));
+ if (ipv6_opt_accepted(sk, opt_skb,
+ &DCCP_SKB_CB(opt_skb)->header.h6)) {
+ skb_set_owner_r(opt_skb, sk);
+ memmove(IP6CB(opt_skb),
+ &DCCP_SKB_CB(opt_skb)->header.h6,
+ sizeof(struct inet6_skb_parm));
+ opt_skb = xchg(&np->pktoptions, opt_skb);
+ } else {
+ __kfree_skb(opt_skb);
+ opt_skb = xchg(&np->pktoptions, NULL);
+ }
+ }
+
+ kfree_skb(opt_skb);
+ return 0;
}
static int dccp_v6_rcv(struct sk_buff *skb)