Release 4.7 net/ipv4/ipip.c

/*
 *      Linux NET3:     IP/IP protocol decoder.
 *
 *      Authors:
 *              Sam Lantinga (slouken@cs.ucdavis.edu)  02/01/95
 *
 *      Fixes:
 *              Alan Cox        :       Merged and made usable non modular (its so tiny its silly as
 *                                      a module taking up 2 pages).
 *              Alan Cox        :       Fixed bug with 1.3.18 and IPIP not working (now needs to set skb->h.iph)
 *                                      to keep ip_forward happy.
 *              Alan Cox        :       More fixes for 1.3.21, and firewall fix. Maybe this will work soon 8).
 *              Kai Schulte     :       Fixed #defines for IP_FIREWALL->FIREWALL
 *              David Woodhouse :       Perform some basic ICMP handling.
 *                                      IPIP Routing without decapsulation.
 *              Carlos Picoto   :       GRE over IP support
 *              Alexey Kuznetsov:       Reworked. Really, now it is truncated version of ipv4/ip_gre.c.
 *                                      I do not want to merge them together.
 *
 *      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.
 *
 */

/* tunnel.c: an IP tunnel driver

        The purpose of this driver is to provide an IP tunnel through
        which you can tunnel network traffic transparently across subnets.

        This was written by looking at Nick Holloway's dummy driver
        Thanks for the great code!

                -Sam Lantinga   (slouken@cs.ucdavis.edu)  02/01/95

        Minor tweaks:
                Cleaned up the code a little and added some pre-1.3.0 tweaks.
                dev->hard_header/hard_header_len changed to use no headers.
                Comments/bracketing tweaked.
                Made the tunnels use dev->name not tunnel: when error reporting.
                Added tx_dropped stat

                -Alan Cox       (alan@lxorguk.ukuu.org.uk) 21 March 95

        Reworked:
                Changed to tunnel to destination gateway in addition to the
                        tunnel's pointopoint address
                Almost completely rewritten
                Note:  There is currently no firewall or ICMP handling done.

                -Sam Lantinga   (slouken@cs.ucdavis.edu) 02/13/96

*/

/* Things I wish I had known when writing the tunnel driver:

        When the tunnel_xmit() function is called, the skb contains the
        packet to be sent (plus a great deal of extra info), and dev
        contains the tunnel device that _we_ are.

        When we are passed a packet, we are expected to fill in the
        source address with our source IP address.

        What is the proper way to allocate, copy and free a buffer?
        After you allocate it, it is a "0 length" chunk of memory
        starting at zero.  If you want to add headers to the buffer
        later, you'll have to call "skb_reserve(skb, amount)" with
        the amount of memory you want reserved.  Then, you call
        "skb_put(skb, amount)" with the amount of space you want in
        the buffer.  skb_put() returns a pointer to the top (#0) of
        that buffer.  skb->len is set to the amount of space you have
        "allocated" with skb_put().  You can then write up to skb->len
        bytes to that buffer.  If you need more, you can call skb_put()
        again with the additional amount of space you need.  You can
        find out how much more space you can allocate by calling
        "skb_tailroom(skb)".
        Now, to add header space, call "skb_push(skb, header_len)".
        This creates space at the beginning of the buffer and returns
        a pointer to this new space.  If later you need to strip a
        header from a buffer, call "skb_pull(skb, header_len)".
        skb_headroom() will return how much space is left at the top
        of the buffer (before the main data).  Remember, this headroom
        space must be reserved before the skb_put() function is called.
        */

/*
   This version of net/ipv4/ipip.c is cloned of net/ipv4/ip_gre.c

   For comments look at net/ipv4/ip_gre.c --ANK
 */


#include <linux/capability.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/netfilter_ipv4.h>
#include <linux/if_ether.h>

#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/ip_tunnels.h>
#include <net/inet_ecn.h>
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>


static bool log_ecn_error = true;
module_param(log_ecn_error, bool, 0644);
MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");


static int ipip_net_id __read_mostly;

static int ipip_tunnel_init(struct net_device *dev);

static struct rtnl_link_ops ipip_link_ops __read_mostly;



static int ipip_err(struct sk_buff *skb, u32 info)
{

/* All the routers (except for Linux) return only
   8 bytes of packet payload. It means, that precise relaying of
   ICMP in the real Internet is absolutely infeasible.
 */
	struct net *net = dev_net(skb->dev);
	struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
	const struct iphdr *iph = (const struct iphdr *)skb->data;
	struct ip_tunnel *t;
	int err;
	const int type = icmp_hdr(skb)->type;
	const int code = icmp_hdr(skb)->code;

	err = -ENOENT;
	t = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
			     iph->daddr, iph->saddr, 0);
	if (!t)
		goto out;

	if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
		ipv4_update_pmtu(skb, dev_net(skb->dev), info,
				 t->parms.link, 0, IPPROTO_IPIP, 0);
		err = 0;
		goto out;
	}

	if (type == ICMP_REDIRECT) {
		ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0,
			      IPPROTO_IPIP, 0);
		err = 0;
		goto out;
	}

	if (t->parms.iph.daddr == 0)
		goto out;

	err = 0;
	if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED)
		goto out;

	if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO))
		t->err_count++;
	else
		t->err_count = 1;
	t->err_time = jiffies;

out:
	return err;
}

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pravin b shelar
pravin b shelar
219
77.94%
1
20.00%
stephen hemminger
stephen hemminger
29
10.32%
1
20.00%
eric dumazet
eric dumazet
26
9.25%
1
20.00%
dmitry popov
dmitry popov
6
2.14%
1
20.00%
ian morris
ian morris
1
0.36%
1
20.00%
Total
281
100.00%
5
100.00%


static const struct tnl_ptk_info tpi = {
	/* no tunnel info required for ipip. */
	.proto = htons(ETH_P_IP),
};



static int ipip_rcv(struct sk_buff *skb)
{
	struct net *net = dev_net(skb->dev);
	struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
	struct ip_tunnel *tunnel;
	const struct iphdr *iph;

	iph = ip_hdr(skb);
	tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
			iph->saddr, iph->daddr, 0);
	if (tunnel) {
		if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
			goto drop;
		if (iptunnel_pull_header(skb, 0, tpi.proto, false))
			goto drop;
		return ip_tunnel_rcv(tunnel, skb, &tpi, NULL, log_ecn_error);
	}

	return -1;

drop:
	kfree_skb(skb);
	return 0;
}

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pravin b shelar
pravin b shelar
77
52.74%
3
17.65%
pre-git
pre-git
31
21.23%
7
41.18%
li hongjun
li hongjun
16
10.96%
1
5.88%
pavel emelianov
pavel emelianov
8
5.48%
2
11.76%
eric dumazet
eric dumazet
6
4.11%
1
5.88%
hideaki yoshifuji
hideaki yoshifuji
3
2.05%
1
5.88%
americo wang
americo wang
3
2.05%
1
5.88%
jiri benc
jiri benc
2
1.37%
1
5.88%
Total
146
100.00%
17
100.00%

/*
 *      This function assumes it is being called from dev_queue_xmit()
 *      and that skb is filled properly by that function.
 */


static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ip_tunnel *tunnel = netdev_priv(dev);
	const struct iphdr  *tiph = &tunnel->parms.iph;

	if (unlikely(skb->protocol != htons(ETH_P_IP)))
		goto tx_error;

	if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4))
		goto tx_error;

	skb_set_inner_ipproto(skb, IPPROTO_IPIP);

	ip_tunnel_xmit(skb, dev, tiph, tiph->protocol);
	return NETDEV_TX_OK;

tx_error:
	kfree_skb(skb);

	dev->stats.tx_errors++;
	return NETDEV_TX_OK;
}

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pravin b shelar
pravin b shelar
54
50.00%
1
6.67%
pre-git
pre-git
18
16.67%
4
26.67%
eric dumazet
eric dumazet
17
15.74%
4
26.67%
tom herbert
tom herbert
8
7.41%
2
13.33%
nicolas dichtel
nicolas dichtel
5
4.63%
2
13.33%
pavel emelianov
pavel emelianov
3
2.78%
1
6.67%
alexander duyck
alexander duyck
3
2.78%
1
6.67%
Total
108
100.00%
15
100.00%


static int

ipip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	int err = 0;
	struct ip_tunnel_parm p;

	if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
		return -EFAULT;

	if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) {
		if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
		    p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
			return -EINVAL;
	}

	p.i_key = p.o_key = 0;
	p.i_flags = p.o_flags = 0;
	err = ip_tunnel_ioctl(dev, &p, cmd);
	if (err)
		return err;

	if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
		return -EFAULT;

	return 0;
}

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pravin b shelar
pravin b shelar
101
58.72%
1
20.00%
pre-git
pre-git
48
27.91%
1
20.00%
americo wang
americo wang
18
10.47%
1
20.00%
stephen hemminger
stephen hemminger
3
1.74%
1
20.00%
eric dumazet
eric dumazet
2
1.16%
1
20.00%
Total
172
100.00%
5
100.00%


static const struct net_device_ops ipip_netdev_ops = {
	.ndo_init       = ipip_tunnel_init,
	.ndo_uninit     = ip_tunnel_uninit,
	.ndo_start_xmit	= ipip_tunnel_xmit,
	.ndo_do_ioctl	= ipip_tunnel_ioctl,
	.ndo_change_mtu = ip_tunnel_change_mtu,
	.ndo_get_stats64 = ip_tunnel_get_stats64,
	.ndo_get_iflink = ip_tunnel_get_iflink,
};


#define IPIP_FEATURES (NETIF_F_SG |           \
                       NETIF_F_FRAGLIST |       \
                       NETIF_F_HIGHDMA |        \
                       NETIF_F_GSO_SOFTWARE |   \
                       NETIF_F_HW_CSUM)



static void ipip_tunnel_setup(struct net_device *dev)
{
	dev->netdev_ops		= &ipip_netdev_ops;

	dev->type		= ARPHRD_TUNNEL;
	dev->flags		= IFF_NOARP;
	dev->addr_len		= 4;
	dev->features		|= NETIF_F_LLTX;
	netif_keep_dst(dev);

	dev->features		|= IPIP_FEATURES;
	dev->hw_features	|= IPIP_FEATURES;
	ip_tunnel_setup(dev, ipip_net_id);
}

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pre-git
pre-git
32
48.48%
2
20.00%
eric dumazet
eric dumazet
19
28.79%
4
40.00%
pravin b shelar
pravin b shelar
7
10.61%
1
10.00%
stephen hemminger
stephen hemminger
4
6.06%
2
20.00%
pavel emelianov
pavel emelianov
4
6.06%
1
10.00%
Total
66
100.00%
10
100.00%



static int ipip_tunnel_init(struct net_device *dev)
{
	struct ip_tunnel *tunnel = netdev_priv(dev);

	memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
	memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);

	tunnel->tun_hlen = 0;
	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;
	tunnel->parms.iph.protocol = IPPROTO_IPIP;
	return ip_tunnel_init(dev);
}

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stephen hemminger
stephen hemminger
34
37.36%
2
22.22%
nicolas dichtel
nicolas dichtel
19
20.88%
1
11.11%
pre-git
pre-git
18
19.78%
2
22.22%
tom herbert
tom herbert
13
14.29%
1
11.11%
pravin b shelar
pravin b shelar
3
3.30%
1
11.11%
patrick mchardy
patrick mchardy
3
3.30%
1
11.11%
eric dumazet
eric dumazet
1
1.10%
1
11.11%
Total
91
100.00%
9
100.00%



static void ipip_netlink_parms(struct nlattr *data[],
			       struct ip_tunnel_parm *parms)
{
	memset(parms, 0, sizeof(*parms));

	parms->iph.version = 4;
	parms->iph.protocol = IPPROTO_IPIP;
	parms->iph.ihl = 5;

	if (!data)
		return;

	if (data[IFLA_IPTUN_LINK])
		parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]);

	if (data[IFLA_IPTUN_LOCAL])
		parms->iph.saddr = nla_get_in_addr(data[IFLA_IPTUN_LOCAL]);

	if (data[IFLA_IPTUN_REMOTE])
		parms->iph.daddr = nla_get_in_addr(data[IFLA_IPTUN_REMOTE]);

	if (data[IFLA_IPTUN_TTL]) {
		parms->iph.ttl = nla_get_u8(data[IFLA_IPTUN_TTL]);
		if (parms->iph.ttl)
			parms->iph.frag_off = htons(IP_DF);
	}

	if (data[IFLA_IPTUN_TOS])
		parms->iph.tos = nla_get_u8(data[IFLA_IPTUN_TOS]);

	if (!data[IFLA_IPTUN_PMTUDISC] || nla_get_u8(data[IFLA_IPTUN_PMTUDISC]))
		parms->iph.frag_off = htons(IP_DF);
}

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nicolas dichtel
nicolas dichtel
209
99.05%
1
50.00%
jiri benc
jiri benc
2
0.95%
1
50.00%
Total
211
100.00%
2
100.00%

/* This function returns true when ENCAP attributes are present in the nl msg */


static bool ipip_netlink_encap_parms(struct nlattr *data[],
				     struct ip_tunnel_encap *ipencap)
{
	bool ret = false;

	memset(ipencap, 0, sizeof(*ipencap));

	if (!data)
		return ret;

	if (data[IFLA_IPTUN_ENCAP_TYPE]) {
		ret = true;
		ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);
	}

	if (data[IFLA_IPTUN_ENCAP_FLAGS]) {
		ret = true;
		ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);
	}

	if (data[IFLA_IPTUN_ENCAP_SPORT]) {
		ret = true;
		ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);
	}

	if (data[IFLA_IPTUN_ENCAP_DPORT]) {
		ret = true;
		ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);
	}

	return ret;
}

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tom herbert
tom herbert
144
98.63%
1
50.00%
sabrina dubroca
sabrina dubroca
2
1.37%
1
50.00%
Total
146
100.00%
2
100.00%



static int ipip_newlink(struct net *src_net, struct net_device *dev,
			struct nlattr *tb[], struct nlattr *data[])
{
	struct ip_tunnel_parm p;
	struct ip_tunnel_encap ipencap;

	if (ipip_netlink_encap_parms(data, &ipencap)) {
		struct ip_tunnel *t = netdev_priv(dev);
		int err = ip_tunnel_encap_setup(t, &ipencap);

		if (err < 0)
			return err;
	}

	ipip_netlink_parms(data, &p);
	return ip_tunnel_newlink(dev, tb, &p);
}

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tom herbert
tom herbert
46
47.42%
1
20.00%
nicolas dichtel
nicolas dichtel
40
41.24%
1
20.00%
pravin b shelar
pravin b shelar
9
9.28%
1
20.00%
pre-git
pre-git
1
1.03%
1
20.00%
eric dumazet
eric dumazet
1
1.03%
1
20.00%
Total
97
100.00%
5
100.00%



static int ipip_changelink(struct net_device *dev, struct nlattr *tb[],
			   struct nlattr *data[])
{
	struct ip_tunnel_parm p;
	struct ip_tunnel_encap ipencap;

	if (ipip_netlink_encap_parms(data, &ipencap)) {
		struct ip_tunnel *t = netdev_priv(dev);
		int err = ip_tunnel_encap_setup(t, &ipencap);

		if (err < 0)
			return err;
	}

	ipip_netlink_parms(data, &p);

	if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) ||
	    (!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr))
		return -EINVAL;

	return ip_tunnel_changelink(dev, tb, &p);
}

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tom herbert
tom herbert
46
34.85%
1
8.33%
nicolas dichtel
nicolas dichtel
36
27.27%
1
8.33%
pravin b shelar
pravin b shelar
26
19.70%
1
8.33%
pre-git
pre-git
12
9.09%
5
41.67%
eric dumazet
eric dumazet
8
6.06%
2
16.67%
ville nuorvala
ville nuorvala
3
2.27%
1
8.33%
david s. miller
david s. miller
1
0.76%
1
8.33%
Total
132
100.00%
12
100.00%



static size_t ipip_get_size(const struct net_device *dev)
{
	return
		/* IFLA_IPTUN_LINK */
		nla_total_size(4) +
		/* IFLA_IPTUN_LOCAL */
		nla_total_size(4) +
		/* IFLA_IPTUN_REMOTE */
		nla_total_size(4) +
		/* IFLA_IPTUN_TTL */
		nla_total_size(1) +
		/* IFLA_IPTUN_TOS */
		nla_total_size(1) +
		/* IFLA_IPTUN_PMTUDISC */
		nla_total_size(1) +
		/* IFLA_IPTUN_ENCAP_TYPE */
		nla_total_size(2) +
		/* IFLA_IPTUN_ENCAP_FLAGS */
		nla_total_size(2) +
		/* IFLA_IPTUN_ENCAP_SPORT */
		nla_total_size(2) +
		/* IFLA_IPTUN_ENCAP_DPORT */
		nla_total_size(2) +
		0;
}

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nicolas dichtel
nicolas dichtel
51
68.00%
2
66.67%
tom herbert
tom herbert
24
32.00%
1
33.33%
Total
75
100.00%
3
100.00%



static int ipip_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
	struct ip_tunnel *tunnel = netdev_priv(dev);
	struct ip_tunnel_parm *parm = &tunnel->parms;

	if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) ||
	    nla_put_in_addr(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) ||
	    nla_put_in_addr(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) ||
	    nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) ||
	    nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) ||
	    nla_put_u8(skb, IFLA_IPTUN_PMTUDISC,
		       !!(parm->iph.frag_off & htons(IP_DF))))
		goto nla_put_failure;

	if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE,
			tunnel->encap.type) ||
	    nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT,
			 tunnel->encap.sport) ||
	    nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT,
			 tunnel->encap.dport) ||
	    nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS,
			tunnel->encap.flags))
		goto nla_put_failure;

	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

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nicolas dichtel
nicolas dichtel
134
69.43%
2
33.33%
tom herbert
tom herbert
55
28.50%
2
33.33%
sabrina dubroca
sabrina dubroca
2
1.04%
1
16.67%
jiri benc
jiri benc
2
1.04%
1
16.67%
Total
193
100.00%
6
100.00%


static const struct nla_policy ipip_policy[IFLA_IPTUN_MAX + 1] = {
	[IFLA_IPTUN_LINK]		= { .type = NLA_U32 },
	[IFLA_IPTUN_LOCAL]		= { .type = NLA_U32 },
	[IFLA_IPTUN_REMOTE]		= { .type = NLA_U32 },
	[IFLA_IPTUN_TTL]		= { .type = NLA_U8 },
	[IFLA_IPTUN_TOS]		= { .type = NLA_U8 },
	[IFLA_IPTUN_PMTUDISC]		= { .type = NLA_U8 },
	[IFLA_IPTUN_ENCAP_TYPE]		= { .type = NLA_U16 },
	[IFLA_IPTUN_ENCAP_FLAGS]	= { .type = NLA_U16 },
	[IFLA_IPTUN_ENCAP_SPORT]	= { .type = NLA_U16 },
	[IFLA_IPTUN_ENCAP_DPORT]	= { .type = NLA_U16 },
};


static struct rtnl_link_ops ipip_link_ops __read_mostly = {
	.kind		= "ipip",
	.maxtype	= IFLA_IPTUN_MAX,
	.policy		= ipip_policy,
	.priv_size	= sizeof(struct ip_tunnel),
	.setup		= ipip_tunnel_setup,
	.newlink	= ipip_newlink,
	.changelink	= ipip_changelink,
	.dellink	= ip_tunnel_dellink,
	.get_size	= ipip_get_size,
	.fill_info	= ipip_fill_info,
	.get_link_net	= ip_tunnel_get_link_net,
};


static struct xfrm_tunnel ipip_handler __read_mostly = {
	.handler	=	ipip_rcv,
	.err_handler	=	ipip_err,
	.priority	=	1,
};



static int __net_init ipip_init_net(struct net *net)
{
	return ip_tunnel_init_net(net, ipip_net_id, &ipip_link_ops, "tunl0");
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pavel emelianov
pavel emelianov
17
68.00%
2
33.33%
pravin b shelar
pravin b shelar
5
20.00%
1
16.67%
alexey dobriyan
alexey dobriyan
2
8.00%
2
33.33%
ted feng
ted feng
1
4.00%
1
16.67%
Total
25
100.00%
6
100.00%



static void __net_exit ipip_exit_net(struct net *net)
{
	struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
	ip_tunnel_delete_net(itn, &ipip_link_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pavel emelianov
pavel emelianov
22
68.75%
2
33.33%
pravin b shelar
pravin b shelar
4
12.50%
1
16.67%
nicolas dichtel
nicolas dichtel
3
9.38%
1
16.67%
eric w. biederman
eric w. biederman
2
6.25%
1
16.67%
alexey dobriyan
alexey dobriyan
1
3.12%
1
16.67%
Total
32
100.00%
6
100.00%


static struct pernet_operations ipip_net_ops = {
	.init = ipip_init_net,
	.exit = ipip_exit_net,
	.id   = &ipip_net_id,
	.size = sizeof(struct ip_tunnel_net),
};



static int __init ipip_init(void)
{
	int err;

	pr_info("ipip: IPv4 over IPv4 tunneling driver\n");

	err = register_pernet_device(&ipip_net_ops);
	if (err < 0)
		return err;
	err = xfrm4_tunnel_register(&ipip_handler, AF_INET);
	if (err < 0) {
		pr_info("%s: can't register tunnel\n", __func__);
		goto xfrm_tunnel_failed;
	}
	err = rtnl_link_register(&ipip_link_ops);
	if (err < 0)
		goto rtnl_link_failed;

out:
	return err;

rtnl_link_failed:
	xfrm4_tunnel_deregister(&ipip_handler, AF_INET);
xfrm_tunnel_failed:
	unregister_pernet_device(&ipip_net_ops);
	goto out;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
43
40.95%
1
7.14%
alexey dobriyan
alexey dobriyan
20
19.05%
1
7.14%
pavel emelianov
pavel emelianov
13
12.38%
2
14.29%
pre-git
pre-git
10
9.52%
3
21.43%
joe perches
joe perches
4
3.81%
1
7.14%
david s. miller
david s. miller
4
3.81%
1
7.14%
stephen hemminger
stephen hemminger
3
2.86%
1
7.14%
herbert xu
herbert xu
3
2.86%
1
7.14%
pravin b shelar
pravin b shelar
2
1.90%
1
7.14%
linus torvalds
linus torvalds
2
1.90%
1
7.14%
al viro
al viro
1
0.95%
1
7.14%
Total
105
100.00%
14
100.00%



static void __exit ipip_fini(void)
{
	rtnl_link_unregister(&ipip_link_ops);
	if (xfrm4_tunnel_deregister(&ipip_handler, AF_INET))
		pr_info("%s: can't deregister tunnel\n", __func__);

	unregister_pernet_device(&ipip_net_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
12
31.58%
1
12.50%
nicolas dichtel
nicolas dichtel
6
15.79%
1
12.50%
herbert xu
herbert xu
5
13.16%
1
12.50%
pavel emelianov
pavel emelianov
5
13.16%
1
12.50%
joe perches
joe perches
4
10.53%
1
12.50%
linus torvalds
linus torvalds
3
7.89%
1
12.50%
kazunori miyazawa
kazunori miyazawa
2
5.26%
1
12.50%
eric w. biederman
eric w. biederman
1
2.63%
1
12.50%
Total
38
100.00%
8
100.00%


module_init(ipip_init);

module_exit(ipip_fini);
MODULE_LICENSE("GPL");
MODULE_ALIAS_RTNL_LINK("ipip");
MODULE_ALIAS_NETDEV("tunl0");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
nicolas dichtel
nicolas dichtel
698
29.45%
7
7.53%
pravin b shelar
pravin b shelar
540
22.78%
4
4.30%
tom herbert
tom herbert
381
16.08%
4
4.30%
pre-git
pre-git
249
10.51%
17
18.28%
stephen hemminger
stephen hemminger
125
5.27%
6
6.45%
pavel emelianov
pavel emelianov
99
4.18%
5
5.38%
eric dumazet
eric dumazet
91
3.84%
13
13.98%
alexey dobriyan
alexey dobriyan
23
0.97%
3
3.23%
linus torvalds
linus torvalds
22
0.93%
2
2.15%
americo wang
americo wang
21
0.89%
2
2.15%
eric w. biederman
eric w. biederman
17
0.72%
1
1.08%
li hongjun
li hongjun
16
0.68%
1
1.08%
david s. miller
david s. miller
10
0.42%
3
3.23%
herbert xu
herbert xu
9
0.38%
1
1.08%
patrick mchardy
patrick mchardy
9
0.38%
2
2.15%
joe perches
joe perches
8
0.34%
1
1.08%
dmitry popov
dmitry popov
6
0.25%
1
1.08%
jiri benc
jiri benc
6
0.25%
3
3.23%
tom gundersen
tom gundersen
5
0.21%
1
1.08%
sabrina dubroca
sabrina dubroca
4
0.17%
1
1.08%
rusty russell
rusty russell
4
0.17%
1
1.08%
hideaki yoshifuji
hideaki yoshifuji
4
0.17%
2
2.15%
tejun heo
tejun heo
3
0.13%
1
1.08%
kris katterjohn
kris katterjohn
3
0.13%
1
1.08%
randy dunlap
randy dunlap
3
0.13%
1
1.08%
ville nuorvala
ville nuorvala
3
0.13%
1
1.08%
alexander duyck
alexander duyck
3
0.13%
1
1.08%
kazunori miyazawa
kazunori miyazawa
2
0.08%
1
1.08%
adrian bunk
adrian bunk
1
0.04%
1
1.08%
al viro
al viro
1
0.04%
1
1.08%
vasiliy kulikov
vasiliy kulikov
1
0.04%
1
1.08%
ian morris
ian morris
1
0.04%
1
1.08%
alan cox
alan cox
1
0.04%
1
1.08%
ted feng
ted feng
1
0.04%
1
1.08%
Total
2370
100.00%
93
100.00%
  
Directory: net/ipv4

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