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Commit 323fbd0e authored by Andrii's avatar Andrii Committed by David S. Miller
Browse files

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: default avatarAndrii Vladyka <tulup@mail.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e3cfddd5

net/dccp/ipv6.c

+35 −12
Original line number Diff line number Diff line
@@ -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 @@ static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) 
		__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)