Commit 41a1f8ea authored by YOSHIFUJI Hideaki's avatar YOSHIFUJI Hideaki
Browse files

[IPV6]: Support IPV6_{RECV,}TCLASS socket options / ancillary data. 



Based on patch from David L Stevens <dlstevens@us.ibm.com>

Signed-off-by: default avatarDavid L Stevens <dlstevens@us.ibm.com>
Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
parent 333fad53

include/linux/in6.h

+0 −2
Original line number Diff line number Diff line
@@ -219,9 +219,7 @@ struct in6_flowlabel_req 
#define IPV6_DSTOPTS		63

#define IPV6_RECVHOPLIMIT	64

#define IPV6_HOPLIMIT		65

#if 0

#define IPV6_RECVTCLASS		66

#define IPV6_TCLASS		67

#endif



#endif

include/linux/ipv6.h

+4 −1
Original line number Diff line number Diff line
@@ -245,7 +245,8 @@ struct ipv6_pinfo { 
				ohopopts:1,

				dstopts:1,

				odstopts:1,

                                rxflow:1;

                                rxflow:1,

				rxtclass:1;

		} bits;

		__u16		all;

	} rxopt;
@@ -256,6 +257,7 @@ struct ipv6_pinfo { 
	                        sndflow:1,

				pmtudisc:2,

				ipv6only:1;

	__u8			tclass;



	__u32			dst_cookie;
@@ -269,6 +271,7 @@ struct ipv6_pinfo { 
		struct ipv6_txoptions *opt;

		struct rt6_info	*rt;

		int hop_limit;

		int tclass;

	} cork;

};

include/net/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -377,6 +377,7 @@ extern int ip6_append_data(struct sock *sk, 
						int length,

						int transhdrlen,

		      				int hlimit,

		      				int tclass,

						struct ipv6_txoptions *opt,

						struct flowi *fl,

						struct rt6_info *rt,

include/net/transp_v6.h

+1 −1
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ extern int datagram_recv_ctl(struct sock *sk, 
extern int			datagram_send_ctl(struct msghdr *msg,

						  struct flowi *fl,

						  struct ipv6_txoptions *opt,

						  int *hlimit);

						  int *hlimit, int *tclass);



#define		LOOPBACK4_IPV6		__constant_htonl(0x7f000006)

net/ipv6/datagram.c

+24 −1
Original line number Diff line number Diff line
@@ -390,6 +390,11 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) 
		put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim);

	}



	if (np->rxopt.bits.rxtclass) {

		int tclass = (ntohl(*(u32 *)skb->nh.ipv6h) >> 20) & 0xff;

		put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);

	}



	if (np->rxopt.bits.rxflow && (*(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK)) {

		u32 flowinfo = *(u32*)skb->nh.raw & IPV6_FLOWINFO_MASK;

		put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
@@ -479,7 +484,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) 


int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,

		      struct ipv6_txoptions *opt,

		      int *hlimit)

		      int *hlimit, int *tclass)

{

	struct in6_pktinfo *src_info;

	struct cmsghdr *cmsg;
@@ -682,6 +687,24 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl, 
			*hlimit = *(int *)CMSG_DATA(cmsg);

			break;



		case IPV6_TCLASS:

		    {

			int tc;



			err = -EINVAL;

			if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) {

				goto exit_f;

			}



			tc = *(int *)CMSG_DATA(cmsg);

			if (tc < 0 || tc > 0xff)

				goto exit_f;



			err = 0;

			*tclass = tc;



			break;

		    }

		default:

			LIMIT_NETDEBUG(KERN_DEBUG "invalid cmsg type: %d\n",

			               cmsg->cmsg_type);

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