[IPV6]: Kill broken and unused IPV6_AUTHHDR support.

include/linux/ipv6.h

@@ -185,7 +185,6 @@ struct inet6_skb_parm
 	int			iif;
 	__u16			ra;
 	__u16			hop;
-	__u16			auth;
 	__u16			dst0;
 	__u16			srcrt;
 	__u16			dst1;
@@ -211,7 +210,6 @@ struct ipv6_pinfo {
 				rxhlim:1,
 				hopopts:1,
 				dstopts:1,
-                                authhdr:1,
                                 rxflow:1;
 		} bits;
 		__u8		all;

net/ipv6/datagram.c

@@ -242,10 +242,6 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
 		struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(skb->nh.raw + opt->srcrt);
 		put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, (rthdr->hdrlen+1) << 3, rthdr);
 	}
-	if (np->rxopt.bits.authhdr && opt->auth) {
-		u8 *ptr = skb->nh.raw + opt->auth;
-		put_cmsg(msg, SOL_IPV6, IPV6_AUTHHDR, (ptr[1]+1)<<2, ptr);
-	}
 	if (np->rxopt.bits.dstopts && opt->dst1) {
 		u8 *ptr = skb->nh.raw + opt->dst1;
 		put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, (ptr[1]+1)<<3, ptr);
@@ -378,26 +374,6 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
 			opt->dst1opt = hdr;
 			break;
 
-		case IPV6_AUTHHDR:
-                        if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) {
-				err = -EINVAL;
-				goto exit_f;
-			}
-
-			hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg);
-			len = ((hdr->hdrlen + 2) << 2);
-			if (cmsg->cmsg_len < CMSG_LEN(len)) {
-				err = -EINVAL;
-				goto exit_f;
-			}
-			if (len & ~7) {
-				err = -EINVAL;
-				goto exit_f;
-			}
-			opt->opt_flen += len;
-			opt->auth = hdr;
-			break;
-
 		case IPV6_RTHDR:
                         if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) {
 				err = -EINVAL;

net/ipv6/exthdrs.c

@@ -518,17 +518,6 @@ static u8 *ipv6_build_exthdr(struct sk_buff *skb, u8 *prev_hdr, u8 type, struct
 	return &h->nexthdr;
 }
 
-static u8 *ipv6_build_authhdr(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_opt_hdr *opt)
-{
-	struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb_put(skb, (opt->hdrlen+2)<<2);
-
-	memcpy(h, opt, (opt->hdrlen+2)<<2);
-	h->nexthdr = *prev_hdr;
-	*prev_hdr = NEXTHDR_AUTH;
-	return &h->nexthdr;
-}
-
-
 u8 *ipv6_build_nfrag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt,
 			  struct in6_addr *daddr, u32 jumbolen)
 {
@@ -567,8 +556,6 @@ u8 *ipv6_build_nfrag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptio
 
 u8 *ipv6_build_frag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt)
 {
-	if (opt->auth)
-		prev_hdr = ipv6_build_authhdr(skb, prev_hdr, opt->auth);
 	if (opt->dst1opt)
 		prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst1opt);
 	return prev_hdr;
@@ -608,15 +595,6 @@ static void ipv6_push_exthdr(struct sk_buff *skb, u8 *proto, u8 type, struct ipv
 	*proto = type;
 }
 
-static void ipv6_push_authhdr(struct sk_buff *skb, u8 *proto, struct ipv6_opt_hdr *opt)
-{
-	struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb_push(skb, (opt->hdrlen+2)<<2);
-
-	memcpy(h, opt, (opt->hdrlen+2)<<2);
-	h->nexthdr = *proto;
-	*proto = NEXTHDR_AUTH;
-}
-
 void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
 			  u8 *proto,
 			  struct in6_addr **daddr)
@@ -633,8 +611,6 @@ void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, u8 *pr
 {
 	if (opt->dst1opt)
 		ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst1opt);
-	if (opt->auth)
-		ipv6_push_authhdr(skb, proto, opt->auth);
 }
 
 struct ipv6_txoptions *
@@ -652,8 +628,6 @@ ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt)
 			*((char**)&opt2->dst0opt) += dif;
 		if (opt2->dst1opt)
 			*((char**)&opt2->dst1opt) += dif;
-		if (opt2->auth)
-			*((char**)&opt2->auth) += dif;
 		if (opt2->srcrt)
 			*((char**)&opt2->srcrt) += dif;
 	}

net/ipv6/ipv6_sockglue.c

@@ -230,11 +230,6 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname, char *optval,
 		retv = 0;
 		break;
 
-	case IPV6_AUTHHDR:
-		np->rxopt.bits.authhdr = valbool;
-		retv = 0;
-		break;
-
 	case IPV6_DSTOPTS:
 		np->rxopt.bits.dstopts = valbool;
 		retv = 0;
@@ -623,10 +618,6 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname, char *optval,
 		val = np->rxopt.bits.hopopts;
 		break;
 
-	case IPV6_AUTHHDR:
-		val = np->rxopt.bits.authhdr;
-		break;
-
 	case IPV6_DSTOPTS:
 		val = np->rxopt.bits.dstopts;
 		break;