Release 4.11 net/ipv6/exthdrs.c

/*
 *      Extension Header handling for IPv6
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *      Andi Kleen              <ak@muc.de>
 *      Alexey Kuznetsov        <kuznet@ms2.inr.ac.ru>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

/* Changes:
 *      yoshfuji                : ensure not to overrun while parsing
 *                                tlv options.
 *      Mitsuru KANDA @USAGI and: Remove ipv6_parse_exthdrs().
 *      YOSHIFUJI Hideaki @USAGI  Register inbound extension header
 *                                handlers as inet6_protocol{}.
 */

#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/in6.h>
#include <linux/icmpv6.h>
#include <linux/slab.h>
#include <linux/export.h>

#include <net/dst.h>
#include <net/sock.h>
#include <net/snmp.h>

#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/transp_v6.h>
#include <net/rawv6.h>
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/calipso.h>
#if IS_ENABLED(CONFIG_IPV6_MIP6)
#include <net/xfrm.h>
#endif
#include <linux/seg6.h>
#include <net/seg6.h>
#ifdef CONFIG_IPV6_SEG6_HMAC
#include <net/seg6_hmac.h>
#endif

#include <linux/uaccess.h>

/*
 *      Parsing tlv encoded headers.
 *
 *      Parsing function "func" returns true, if parsing succeed
 *      and false, if it failed.
 *      It MUST NOT touch skb->h.
 */


struct tlvtype_proc {
	
int	type;
	
bool	(*func)(struct sk_buff *skb, int offset);
};

/*********************
  Generic functions
 *********************/

/* An unknown option is detected, decide what to do */



static bool ip6_tlvopt_unknown(struct sk_buff *skb, int optoff)
{
	switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {
	case 0: /* ignore */
		return true;

	case 1: /* drop packet */
		break;

	case 3: /* Send ICMP if not a multicast address and drop packet */
		/* Actually, it is redundant check. icmp_send
                   will recheck in any case.
                 */
		if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr))
			break;
	case 2: /* send ICMP PARM PROB regardless and drop packet */
		icmpv6_param_prob(skb, ICMPV6_UNK_OPTION, optoff);
		return false;
	}

	kfree_skb(skb);
	return false;
}

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6
6.90%
2
28.57%
Linus Torvalds
5
5.75%
1
14.29%
Eric Dumazet
4
4.60%
1
14.29%
Stephen Rothwell
1
1.15%
1
14.29%
Herbert Xu
1
1.15%
1
14.29%
Total
87
100.00%
7
100.00%

/* Parse tlv encoded option header (hop-by-hop or destination) */



static bool ip6_parse_tlv(const struct tlvtype_proc *procs, struct sk_buff *skb)
{
	const struct tlvtype_proc *curr;
	const unsigned char *nh = skb_network_header(skb);
	int off = skb_network_header_len(skb);
	int len = (skb_transport_header(skb)[1] + 1) << 3;
	int padlen = 0;

	if (skb_transport_offset(skb) + len > skb_headlen(skb))
		goto bad;

	off += 2;
	len -= 2;

	while (len > 0) {
		int optlen = nh[off + 1] + 2;
		int i;

		switch (nh[off]) {
		case IPV6_TLV_PAD1:
			optlen = 1;
			padlen++;
			if (padlen > 7)
				goto bad;
			break;

		case IPV6_TLV_PADN:
			/* RFC 2460 states that the purpose of PadN is
                         * to align the containing header to multiples
                         * of 8. 7 is therefore the highest valid value.
                         * See also RFC 4942, Section 2.1.9.5.
                         */
			padlen += optlen;
			if (padlen > 7)
				goto bad;
			/* RFC 4942 recommends receiving hosts to
                         * actively check PadN payload to contain
                         * only zeroes.
                         */
			for (i = 2; i < optlen; i++) {
				if (nh[off + i] != 0)
					goto bad;
			}
			break;

		default: /* Other TLV code so scan list */
			if (optlen > len)
				goto bad;
			for (curr = procs; curr->type >= 0; curr++) {
				if (curr->type == nh[off]) {
					/* type specific length/alignment
                                           checks will be performed in the
                                           func(). */
					if (curr->func(skb, off) == false)
						return false;
					break;
				}
			}
			if (curr->type < 0) {
				if (ip6_tlvopt_unknown(skb, off) == 0)
					return false;
			}
			padlen = 0;
			break;
		}
		off += optlen;
		len -= optlen;
	}

	if (len == 0)
		return true;
bad:
	kfree_skb(skb);
	return false;
}

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1
7.69%
Eldad Zack
69
22.70%
3
23.08%
Linus Torvalds
37
12.17%
2
15.38%
Arnaldo Carvalho de Melo
20
6.58%
4
30.77%
Eric Dumazet
8
2.63%
1
7.69%
Herbert Xu
3
0.99%
1
7.69%
Hideaki Yoshifuji / 吉藤英明
1
0.33%
1
7.69%
Total
304
100.00%
13
100.00%

/*****************************
  Destination options header.
 *****************************/

#if IS_ENABLED(CONFIG_IPV6_MIP6)


static bool ipv6_dest_hao(struct sk_buff *skb, int optoff)
{
	struct ipv6_destopt_hao *hao;
	struct inet6_skb_parm *opt = IP6CB(skb);
	struct ipv6hdr *ipv6h = ipv6_hdr(skb);
	struct in6_addr tmp_addr;
	int ret;

	if (opt->dsthao) {
		net_dbg_ratelimited("hao duplicated\n");
		goto discard;
	}
	opt->dsthao = opt->dst1;
	opt->dst1 = 0;

	hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) + optoff);

	if (hao->length != 16) {
		net_dbg_ratelimited("hao invalid option length = %d\n",
				    hao->length);
		goto discard;
	}

	if (!(ipv6_addr_type(&hao->addr) & IPV6_ADDR_UNICAST)) {
		net_dbg_ratelimited("hao is not an unicast addr: %pI6\n",
				    &hao->addr);
		goto discard;
	}

	ret = xfrm6_input_addr(skb, (xfrm_address_t *)&ipv6h->daddr,
			       (xfrm_address_t *)&hao->addr, IPPROTO_DSTOPTS);
	if (unlikely(ret < 0))
		goto discard;

	if (skb_cloned(skb)) {
		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
			goto discard;

		/* update all variable using below by copied skbuff */
		hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) +
						  optoff);
		ipv6h = ipv6_hdr(skb);
	}

	if (skb->ip_summed == CHECKSUM_COMPLETE)
		skb->ip_summed = CHECKSUM_NONE;

	tmp_addr = ipv6h->saddr;
	ipv6h->saddr = hao->addr;
	hao->addr = tmp_addr;

	if (skb->tstamp == 0)
		__net_timestamp(skb);

	return true;

 discard:
	kfree_skb(skb);
	return false;
}
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Arnaldo Carvalho de Melo
12
4.11%
2
20.00%
Herbert Xu
10
3.42%
2
20.00%
Eric Dumazet
3
1.03%
1
10.00%
Joe Perches
3
1.03%
1
10.00%
Alexey Dobriyan
3
1.03%
1
10.00%
Harvey Harrison
2
0.68%
2
20.00%
Total
292
100.00%
10
100.00%

#endif


static const struct tlvtype_proc tlvprocdestopt_lst[] = {
#if IS_ENABLED(CONFIG_IPV6_MIP6)
	{
		.type	= IPV6_TLV_HAO,
		.func	= ipv6_dest_hao,
        },
#endif
	{-1,			NULL}
};



static int ipv6_destopt_rcv(struct sk_buff *skb)
{
	struct inet6_skb_parm *opt = IP6CB(skb);
#if IS_ENABLED(CONFIG_IPV6_MIP6)
	__u16 dstbuf;
#endif
	struct dst_entry *dst = skb_dst(skb);

	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
	    !pskb_may_pull(skb, (skb_transport_offset(skb) +
				 ((skb_transport_header(skb)[1] + 1) << 3)))) {
		__IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst),
				IPSTATS_MIB_INHDRERRORS);
		kfree_skb(skb);
		return -1;
	}

	opt->lastopt = opt->dst1 = skb_network_header_len(skb);
#if IS_ENABLED(CONFIG_IPV6_MIP6)
	dstbuf = opt->dst1;
#endif

	if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
		skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
		opt = IP6CB(skb);
#if IS_ENABLED(CONFIG_IPV6_MIP6)
		opt->nhoff = dstbuf;
#else
		opt->nhoff = opt->dst1;
#endif
		return 1;
	}

	__IP6_INC_STATS(dev_net(dst->dev),
			ip6_dst_idev(dst), IPSTATS_MIB_INHDRERRORS);
	return -1;
}

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45
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3
13.64%
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45
20.00%
1
4.55%
Hideaki Yoshifuji / 吉藤英明
33
14.67%
5
22.73%
Arnaldo Carvalho de Melo
17
7.56%
4
18.18%
Denis V. Lunev
13
5.78%
1
4.55%
Eric Dumazet
9
4.00%
2
9.09%
Shirley Ma
6
2.67%
1
4.55%
Patrick McHardy
3
1.33%
1
4.55%
Américo Wang
3
1.33%
1
4.55%
Herbert Xu
2
0.89%
1
4.55%
Mitsuru Kanda
1
0.44%
1
4.55%
Total
225
100.00%
22
100.00%



static void seg6_update_csum(struct sk_buff *skb)
{
	struct ipv6_sr_hdr *hdr;
	struct in6_addr *addr;
	__be32 from, to;

	/* srh is at transport offset and seg_left is already decremented
         * but daddr is not yet updated with next segment
         */

	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);
	addr = hdr->segments + hdr->segments_left;

	hdr->segments_left++;
	from = *(__be32 *)hdr;

	hdr->segments_left--;
	to = *(__be32 *)hdr;

	/* update skb csum with diff resulting from seg_left decrement */

	update_csum_diff4(skb, from, to);

	/* compute csum diff between current and next segment and update */

	update_csum_diff16(skb, (__be32 *)(&ipv6_hdr(skb)->daddr),
			   (__be32 *)addr);
}

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David Lebrun
95
84.07%
1
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Linus Torvalds (pre-git)
16
14.16%
1
25.00%
Herbert Xu
1
0.88%
1
25.00%
Hideaki Yoshifuji / 吉藤英明
1
0.88%
1
25.00%
Total
113
100.00%
4
100.00%



static int ipv6_srh_rcv(struct sk_buff *skb)
{
	struct inet6_skb_parm *opt = IP6CB(skb);
	struct net *net = dev_net(skb->dev);
	struct ipv6_sr_hdr *hdr;
	struct inet6_dev *idev;
	struct in6_addr *addr;
	int accept_seg6;

	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);

	idev = __in6_dev_get(skb->dev);

	accept_seg6 = net->ipv6.devconf_all->seg6_enabled;
	if (accept_seg6 > idev->cnf.seg6_enabled)
		accept_seg6 = idev->cnf.seg6_enabled;

	if (!accept_seg6) {
		kfree_skb(skb);
		return -1;
	}

#ifdef CONFIG_IPV6_SEG6_HMAC
	if (!seg6_hmac_validate_skb(skb)) {
		kfree_skb(skb);
		return -1;
	}
#endif

looped_back:
	if (hdr->segments_left == 0) {
		if (hdr->nexthdr == NEXTHDR_IPV6) {
			int offset = (hdr->hdrlen + 1) << 3;

			skb_postpull_rcsum(skb, skb_network_header(skb),
					   skb_network_header_len(skb));

			if (!pskb_pull(skb, offset)) {
				kfree_skb(skb);
				return -1;
			}
			skb_postpull_rcsum(skb, skb_transport_header(skb),
					   offset);

			skb_reset_network_header(skb);
			skb_reset_transport_header(skb);
			skb->encapsulation = 0;

			__skb_tunnel_rx(skb, skb->dev, net);

			netif_rx(skb);
			return -1;
		}

		opt->srcrt = skb_network_header_len(skb);
		opt->lastopt = opt->srcrt;
		skb->transport_header += (hdr->hdrlen + 1) << 3;
		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);

		return 1;
	}

	if (hdr->segments_left >= (hdr->hdrlen >> 1)) {
		__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
				IPSTATS_MIB_INHDRERRORS);
		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
				  ((&hdr->segments_left) -
				   skb_network_header(skb)));
		return -1;
	}

	if (skb_cloned(skb)) {
		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_OUTDISCARDS);
			kfree_skb(skb);
			return -1;
		}
	}

	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);

	hdr->segments_left--;
	addr = hdr->segments + hdr->segments_left;

	skb_push(skb, sizeof(struct ipv6hdr));

	if (skb->ip_summed == CHECKSUM_COMPLETE)
		seg6_update_csum(skb);

	ipv6_hdr(skb)->daddr = *addr;

	skb_dst_drop(skb);

	ip6_route_input(skb);

	if (skb_dst(skb)->error) {
		dst_input(skb);
		return -1;
	}

	if (skb_dst(skb)->dev->flags & IFF_LOOPBACK) {
		if (ipv6_hdr(skb)->hop_limit <= 1) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_INHDRERRORS);
			icmpv6_send(skb, ICMPV6_TIME_EXCEED,
				    ICMPV6_EXC_HOPLIMIT, 0);
			kfree_skb(skb);
			return -1;
		}
		ipv6_hdr(skb)->hop_limit--;

		skb_pull(skb, sizeof(struct ipv6hdr));
		goto looped_back;
	}

	dst_input(skb);

	return -1;
}

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541
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3
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32
5.35%
3
30.00%
Linus Torvalds (pre-git)
15
2.51%
1
10.00%
Denis V. Lunev
5
0.84%
1
10.00%
Linus Torvalds
4
0.67%
1
10.00%
Eric Dumazet
1
0.17%
1
10.00%
Total
598
100.00%
10
100.00%

/********************************
  Routing header.
 ********************************/

/* called with rcu_read_lock() */


static int ipv6_rthdr_rcv(struct sk_buff *skb)
{
	struct inet6_skb_parm *opt = IP6CB(skb);
	struct in6_addr *addr = NULL;
	struct in6_addr daddr;
	struct inet6_dev *idev;
	int n, i;
	struct ipv6_rt_hdr *hdr;
	struct rt0_hdr *rthdr;
	struct net *net = dev_net(skb->dev);
	int accept_source_route = net->ipv6.devconf_all->accept_source_route;

	idev = __in6_dev_get(skb->dev);
	if (idev && accept_source_route > idev->cnf.accept_source_route)
		accept_source_route = idev->cnf.accept_source_route;

	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
	    !pskb_may_pull(skb, (skb_transport_offset(skb) +
				 ((skb_transport_header(skb)[1] + 1) << 3)))) {
		__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
				IPSTATS_MIB_INHDRERRORS);
		kfree_skb(skb);
		return -1;
	}

	hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb);

	if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ||
	    skb->pkt_type != PACKET_HOST) {
		__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
				IPSTATS_MIB_INADDRERRORS);
		kfree_skb(skb);
		return -1;
	}

	/* segment routing */
	if (hdr->type == IPV6_SRCRT_TYPE_4)
		return ipv6_srh_rcv(skb);

looped_back:
	if (hdr->segments_left == 0) {
		switch (hdr->type) {
#if IS_ENABLED(CONFIG_IPV6_MIP6)
		case IPV6_SRCRT_TYPE_2:
			/* Silently discard type 2 header unless it was
                         * processed by own
                         */
			if (!addr) {
				__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
						IPSTATS_MIB_INADDRERRORS);
				kfree_skb(skb);
				return -1;
			}
			break;
#endif
		default:
			break;
		}

		opt->lastopt = opt->srcrt = skb_network_header_len(skb);
		skb->transport_header += (hdr->hdrlen + 1) << 3;
		opt->dst0 = opt->dst1;
		opt->dst1 = 0;
		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);
		return 1;
	}

	switch (hdr->type) {
#if IS_ENABLED(CONFIG_IPV6_MIP6)
	case IPV6_SRCRT_TYPE_2:
		if (accept_source_route < 0)
			goto unknown_rh;
		/* Silently discard invalid RTH type 2 */
		if (hdr->hdrlen != 2 || hdr->segments_left != 1) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_INHDRERRORS);
			kfree_skb(skb);
			return -1;
		}
		break;
#endif
	default:
		goto unknown_rh;
	}

	/*
         *      This is the routing header forwarding algorithm from
         *      RFC 2460, page 16.
         */

	n = hdr->hdrlen >> 1;

	if (hdr->segments_left > n) {
		__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
				IPSTATS_MIB_INHDRERRORS);
		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
				  ((&hdr->segments_left) -
				   skb_network_header(skb)));
		return -1;
	}

	/* We are about to mangle packet header. Be careful!
           Do not damage packets queued somewhere.
         */
	if (skb_cloned(skb)) {
		/* the copy is a forwarded packet */
		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_OUTDISCARDS);
			kfree_skb(skb);
			return -1;
		}
		hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb);
	}

	if (skb->ip_summed == CHECKSUM_COMPLETE)
		skb->ip_summed = CHECKSUM_NONE;

	i = n - --hdr->segments_left;

	rthdr = (struct rt0_hdr *) hdr;
	addr = rthdr->addr;
	addr += i - 1;

	switch (hdr->type) {
#if IS_ENABLED(CONFIG_IPV6_MIP6)
	case IPV6_SRCRT_TYPE_2:
		if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,
				     (xfrm_address_t *)&ipv6_hdr(skb)->saddr,
				     IPPROTO_ROUTING) < 0) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_INADDRERRORS);
			kfree_skb(skb);
			return -1;
		}
		if (!ipv6_chk_home_addr(dev_net(skb_dst(skb)->dev), addr)) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_INADDRERRORS);
			kfree_skb(skb);
			return -1;
		}
		break;
#endif
	default:
		break;
	}

	if (ipv6_addr_is_multicast(addr)) {
		__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
				IPSTATS_MIB_INADDRERRORS);
		kfree_skb(skb);
		return -1;
	}

	daddr = *addr;
	*addr = ipv6_hdr(skb)->daddr;
	ipv6_hdr(skb)->daddr = daddr;

	skb_dst_drop(skb);
	ip6_route_input(skb);
	if (skb_dst(skb)->error) {
		skb_push(skb, skb->data - skb_network_header(skb));
		dst_input(skb);
		return -1;
	}

	if (skb_dst(skb)->dev->flags&IFF_LOOPBACK) {
		if (ipv6_hdr(skb)->hop_limit <= 1) {
			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
					IPSTATS_MIB_INHDRERRORS);
			icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
				    0);
			kfree_skb(skb);
			return -1;
		}
		ipv6_hdr(skb)->hop_limit--;
		goto looped_back;
	}

	skb_push(skb, skb->data - skb_network_header(skb));
	dst_input(skb);
	return -1;

unknown_rh:
	__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INHDRERRORS);
	icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
			  (&hdr->type) - skb_network_header(skb));
	return -1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
249
25.67%
1
3.23%
David Lebrun
200
20.62%
1
3.23%
Hideaki Yoshifuji / 吉藤英明
162
16.70%
9
29.03%
Masahide Nakamura
160
16.49%
2
6.45%
Eric Dumazet
50
5.15%
2
6.45%
Linus Torvalds
40
4.12%
1
3.23%
Arnaldo Carvalho de Melo
39
4.02%
5
16.13%
Denis V. Lunev
26
2.68%
2
6.45%
Shirley Ma
20
2.06%
1
3.23%
Herbert Xu
9
0.93%
1
3.23%
Alexey Dobriyan
5
0.52%
1
3.23%
Patrick McHardy
4
0.41%
2
6.45%
Américo Wang
3
0.31%
1
3.23%
Mitsuru Kanda
2
0.21%
1
3.23%
Daniel Lezcano
1
0.10%
1
3.23%
Total
970
100.00%
31
100.00%


static const struct inet6_protocol rthdr_protocol = {
	.handler	=	ipv6_rthdr_rcv,
	.flags		=	INET6_PROTO_NOPOLICY,
};


static const struct inet6_protocol destopt_protocol = {
	.handler	=	ipv6_destopt_rcv,
	.flags		=	INET6_PROTO_NOPOLICY,
};


static const struct inet6_protocol nodata_protocol = {
	.handler	=	dst_discard,
	.flags		=	INET6_PROTO_NOPOLICY,
};



int __init ipv6_exthdrs_init(void)
{
	int ret;

	ret = inet6_add_protocol(&rthdr_protocol, IPPROTO_ROUTING);
	if (ret)
		goto out;

	ret = inet6_add_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
	if (ret)
		goto out_rthdr;

	ret = inet6_add_protocol(&nodata_protocol, IPPROTO_NONE);
	if (ret)
		goto out_destopt;

out:
	return ret;
out_destopt:
	inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
out_rthdr:
	inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
	goto out;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Lezcano
67
74.44%
1
25.00%
Mitsuru Kanda
16
17.78%
1
25.00%
Vlad Yasevich
7
7.78%
2
50.00%
Total
90
100.00%
4
100.00%

;



void ipv6_exthdrs_exit(void)
{
	inet6_del_protocol(&nodata_protocol, IPPROTO_NONE);
	inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS)