Release 4.11 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 <linux/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>
#include <net/dst_metadata.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 unsigned 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, iph->protocol, 0);
		err = 0;
		goto out;
	}

	if (type == ICMP_REDIRECT) {
		ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0,
			      iph->protocol, 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
217
76.14%
1
16.67%
Stephen Hemminger
29
10.18%
1
16.67%
Eric Dumazet
26
9.12%
1
16.67%
Simon Horman
6
2.11%
1
16.67%
Dmitry Popov
6
2.11%
1
16.67%
Ian Morris
1
0.35%
1
16.67%
Total
285
100.00%
6
100.00%


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

#if IS_ENABLED(CONFIG_MPLS)

static const struct tnl_ptk_info mplsip_tpi = {
	/* no tunnel info required for mplsip. */
	.proto = htons(ETH_P_MPLS_UC),
};
#endif



static int ipip_tunnel_rcv(struct sk_buff *skb, u8 ipproto)
{
	struct net *net = dev_net(skb->dev);
	struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
	struct metadata_dst *tun_dst = NULL;
	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) {
		const struct tnl_ptk_info *tpi;

		if (tunnel->parms.iph.protocol != ipproto &&
		    tunnel->parms.iph.protocol != 0)
			goto drop;

		if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
			goto drop;
#if IS_ENABLED(CONFIG_MPLS)
		if (ipproto == IPPROTO_MPLS)
			tpi = &mplsip_tpi;
		else
#endif
			tpi = &ipip_tpi;
		if (iptunnel_pull_header(skb, 0, tpi->proto, false))
			goto drop;
		if (tunnel->collect_md) {
			tun_dst = ip_tun_rx_dst(skb, 0, 0, 0);
			if (!tun_dst)
				return 0;
		}
		return ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);
	}

	return -1;

drop:
	kfree_skb(skb);
	return 0;
}

Contributors
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Pravin B Shelar
74
30.83%
3
15.79%
Simon Horman
61
25.42%
1
5.26%
Alexei Starovoitov
37
15.42%
1
5.26%
Linus Torvalds (pre-git)
31
12.92%
7
36.84%
Li Hongjun
15
6.25%
1
5.26%
Pavel Emelyanov
8
3.33%
2
10.53%
Eric Dumazet
6
2.50%
1
5.26%
Américo Wang
3
1.25%
1
5.26%
Hideaki Yoshifuji / 吉藤英明
3
1.25%
1
5.26%
Jiri Benc
2
0.83%
1
5.26%
Total
240
100.00%
19
100.00%



static int ipip_rcv(struct sk_buff *skb)
{
	return ipip_tunnel_rcv(skb, IPPROTO_IPIP);
}

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19
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1
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#if IS_ENABLED(CONFIG_MPLS)


static int mplsip_rcv(struct sk_buff *skb)
{
	return ipip_tunnel_rcv(skb, IPPROTO_MPLS);
}
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Simon Horman
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19
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#endif

/*
 *      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;
	u8 ipproto;

	switch (skb->protocol) {
	case htons(ETH_P_IP):
		ipproto = IPPROTO_IPIP;
		break;
#if IS_ENABLED(CONFIG_MPLS)
	case htons(ETH_P_MPLS_UC):
		ipproto = IPPROTO_MPLS;
		break;
#endif
	default:
		goto tx_error;
	}

	if (tiph->protocol != ipproto && tiph->protocol != 0)
		goto tx_error;

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

	skb_set_inner_ipproto(skb, ipproto);

	if (tunnel->collect_md)
		ip_md_tunnel_xmit(skb, dev, ipproto);
	else
		ip_tunnel_xmit(skb, dev, tiph, ipproto);
	return NETDEV_TX_OK;

tx_error:
	kfree_skb(skb);

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

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Simon Horman
51
30.54%
1
5.88%
Pravin B Shelar
51
30.54%
1
5.88%
Eric Dumazet
17
10.18%
4
23.53%
Linus Torvalds (pre-git)
17
10.18%
4
23.53%
Alexei Starovoitov
16
9.58%
1
5.88%
Tom Herbert
7
4.19%
2
11.76%
Alexander Duyck
3
1.80%
1
5.88%
Pavel Emelyanov
3
1.80%
1
5.88%
Nicolas Dichtel
2
1.20%
2
11.76%
Total
167
100.00%
17
100.00%



static bool ipip_tunnel_ioctl_verify_protocol(u8 ipproto)
{
	switch (ipproto) {
	case 0:
	case IPPROTO_IPIP:
#if IS_ENABLED(CONFIG_MPLS)
	case IPPROTO_MPLS:
#endif
		return true;
	}

	return false;
}

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38
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1
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 ||
		    !ipip_tunnel_ioctl_verify_protocol(p.iph.protocol) ||
		    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
99
56.90%
1
16.67%
Linus Torvalds (pre-git)
48
27.59%
1
16.67%
Américo Wang
18
10.34%
1
16.67%
Simon Horman
4
2.30%
1
16.67%
Stephen Hemminger
3
1.72%
1
16.67%
Eric Dumazet
2
1.15%
1
16.67%
Total
174
100.00%
6
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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Linus Torvalds (pre-git)
32
48.48%
2
20.00%
Eric Dumazet
19
28.79%
4
40.00%
Pravin B Shelar
7
10.61%
1
10.00%
Stephen Hemminger
4
6.06%
2
20.00%
Pavel Emelyanov
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;
	return ip_tunnel_init(dev);
}

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Stephen Hemminger
34
41.98%
2
22.22%
Linus Torvalds (pre-git)
18
22.22%
2
22.22%
Nicolas Dichtel
12
14.81%
1
11.11%
Tom Herbert
11
13.58%
1
11.11%
Patrick McHardy
3
3.70%
1
11.11%
Pravin B Shelar
2
2.47%
1
11.11%
Eric Dumazet
1
1.23%
1
11.11%
Total
81
100.00%
9
100.00%



static int ipip_tunnel_validate(struct nlattr *tb[], struct nlattr *data[])
{
	u8 proto;

	if (!data || !data[IFLA_IPTUN_PROTO])
		return 0;

	proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
	if (proto != IPPROTO_IPIP && proto != IPPROTO_MPLS && proto != 0)
		return -EINVAL;

	return 0;
}

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

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

	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_PROTO])
		parms->iph.protocol = nla_get_u8(data[IFLA_IPTUN_PROTO]);

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

	if (data[IFLA_IPTUN_COLLECT_METADATA])
		*collect_md = true;
}

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Nicolas Dichtel
209
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1
25.00%
Simon Horman
21
8.30%
1
25.00%
Alexei Starovoitov
21
8.30%
1
25.00%
Jiri Benc
2
0.79%
1
25.00%
Total
253
100.00%
4
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
144
98.63%
1
50.00%
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 *t = netdev_priv(dev);
	struct ip_tunnel_parm p;
	struct ip_tunnel_encap ipencap;

	if (ipip_netlink_encap_parms(data, &ipencap)) {
		int err = ip_tunnel_encap_setup(t, &ipencap);

		if (err < 0)
			return err;
	}

	ipip_netlink_parms(data, &p, &t->collect_md);
	return ip_tunnel_newlink(dev, tb, &p);
}

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Nicolas Dichtel
40
39.22%
1
16.67%
Tom Herbert
36
35.29%
1
16.67%
Alexei Starovoitov
15
14.71%
1
16.67%
Pravin B Shelar
9
8.82%
1
16.67%
Eric Dumazet
1
0.98%
1
16.67%
Linus Torvalds (pre-git)
1
0.98%
1
16.67%
Total
102
100.00%
6
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;
	bool collect_md;

	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, &collect_md);
	if (collect_md)
		return -EINVAL;

	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
46
31.51%
1
7.69%
Nicolas Dichtel
36
24.66%
1
7.69%
Pravin B Shelar
26
17.81%
1
7.69%
Alexei Starovoitov
14
9.59%
1
7.69%
Linus Torvalds (pre-git)
12
8.22%
5
38.46%
Eric Dumazet
8
5.48%
2
15.38%
Ville Nuorvala
3
2.05%
1
7.69%
David S. Miller
1
0.68%
1
7.69%
Total
146
100.00%
13
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_PROTO */
		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) +
		/* IFLA_IPTUN_COLLECT_METADATA */
		nla_total_size(0) +
		0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Nicolas Dichtel
51
58.62%
2
40.00%
Tom Herbert
24
27.59%
1
20.00%
Alexei Starovoitov
6
6.90%
1
20.00%
Simon Horman
6
6.90%
1
20.00%
Total
87
100.00%
5
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_PROTO, parm->iph.protocol) ||
	    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;

	if (tunnel->collect_md)
		if (nla_put_flag(skb, IFLA_IPTUN_COLLECT_METADATA))
			goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Nicolas Dichtel
134
59.82%
2
25.00%
Tom Herbert
55
24.55%
2
25.00%
Alexei Starovoitov
18
8.04%
1
12.50%
Simon Horman
13
5.80%
1
12.50%
Jiri Benc
2
0.89%
1
12.50%
Sabrina Dubroca
2
0.89%
1
12.50%
Total
224
100.00%
8
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_PROTO]		= { .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 },
	[IFLA_IPTUN_COLLECT_METADATA]	= { .type = NLA_FLAG },
};


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,
	.validate	= ipip_tunnel_validate,
	.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,
};

#if IS_ENABLED(CONFIG_MPLS)

static struct xfrm_tunnel mplsip_handler __read_mostly = {
	.handler	=	mplsip_rcv,
	.err_handler	=	ipip_err,
	.priority	=	1,
};
#endif



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 Emelyanov
17
68.00%
2
33.33%
Pravin B Shelar
5
20.00%
1
16.67%
Alexey Dobriyan
2
8.00%
2
33.33%
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 Emelyanov
22
68.75%
2
33.33%
Pravin B Shelar
4
12.50%
1
16.67%
Nicolas Dichtel
3
9.38%
1
16.67%
Eric W. Biedermann
2
6.25%
1
16.67%
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 and MPLS 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_ipip_failed;
	}
#if IS_ENABLED(CONFIG_MPLS)
	err = xfrm4_tunnel_register(&mplsip_handler, AF_MPLS);
	if (err < 0) {
		pr_info("%s: can't register tunnel\n", __func__);
		goto xfrm_tunnel_mplsip_failed;
	}
#endif
	err = rtnl_link_register(&ipip_link_ops);
	if (err < 0)
		goto rtnl_link_failed;

out:
	return err;

rtnl_link_failed:
#if IS_ENABLED(CONFIG_MPLS)
	xfrm4_tunnel_deregister(&mplsip_handler, AF_INET);
xfrm_tunnel_mplsip_failed:

#endif
	xfrm4_tunnel_deregister(&ipip_handler, AF_INET);
xfrm_tunnel_ipip_failed:
	unregister_pernet_device(&ipip_net_ops);
	goto out;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Simon Horman
57
35.85%
1
6.67%
Nicolas Dichtel
41
25.79%
1
6.67%
Alexey Dobriyan
20
12.58%
1
6.67%
Pavel Emelyanov
13
8.18%
2
13.33%
Linus Torvalds (pre-git)
10
6.29%
3
20.00%
Joe Perches
4
2.52%
1
6.67%
David S. Miller
4
2.52%
1
6.67%
Stephen Hemminger
3
1.89%
1
6.67%
Herbert Xu
3
1.89%
1
6.67%
Linus Torvalds
2
1.26%
1
6.67%
Al Viro
1
0.63%
1
6.67%
Pravin B Shelar
1
0.63%
1
6.67%
Total
159
100.00%
15
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__);
#if IS_ENABLED(CONFIG_MPLS)
	if (xfrm4_tunnel_deregister(&mplsip_handler, AF_MPLS))
		pr_info("%s: can't deregister tunnel\n", __func__);
#endif
	unregister_pernet_device(&ipip_net_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Simon Horman
25
39.68%
1
11.11%
Linus Torvalds (pre-git)
12
19.05%
1
11.11%
Nicolas Dichtel
6
9.52%
1
11.11%
Pavel Emelyanov
5
7.94%
1
11.11%
Herbert Xu
5
7.94%
1
11.11%
Joe Perches
4
6.35%
1
11.11%
Linus Torvalds
3
4.76%
1
11.11%
Kazunori Miyazawa
2
3.17%
1
11.11%
Eric W. Biedermann
1
1.59%
1
11.11%
Total
63
100.00%
9
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
686
23.34%
7
7.22%
Pravin B Shelar
527
17.93%
4
4.12%
Simon Horman
467
15.89%
1
1.03%
Tom Herbert
368
12.52%
4
4.12%
Linus Torvalds (pre-git)
247
8.40%
17
17.53%
Alexei Starovoitov
141
4.80%
1
1.03%
Stephen Hemminger
125
4.25%
6
6.19%
Pavel Emelyanov
99
3.37%
5
5.15%
Eric Dumazet
91
3.10%
13
13.40%
Alexey Dobriyan
24
0.82%
4
4.12%
Linus Torvalds
23
0.78%
3
3.09%
Américo Wang
21
0.71%
2
2.06%
Eric W. Biedermann
17
0.58%
1
1.03%
Li Hongjun
15
0.51%
1
1.03%
David S. Miller
10
0.34%
3
3.09%
Herbert Xu
9
0.31%
1
1.03%
Patrick McHardy
9
0.31%
2
2.06%
Joe Perches
8
0.27%
1
1.03%
Jiri Benc
6
0.20%
3
3.09%
Dmitry Popov
6
0.20%
1
1.03%
Tom Gundersen
5
0.17%
1
1.03%
Rusty Russell
4
0.14%
1
1.03%
Sabrina Dubroca
4
0.14%
1
1.03%
Hideaki Yoshifuji / 吉藤英明
4
0.14%
2
2.06%
Tejun Heo
3
0.10%
1
1.03%
Kris Katterjohn
3
0.10%
1
1.03%
Randy Dunlap
3
0.10%
1
1.03%
Ville Nuorvala
3
0.10%
1
1.03%
Alexander Duyck
3
0.10%
1
1.03%
Kazunori Miyazawa
2
0.07%
1
1.03%
Ted Feng
1
0.03%
1
1.03%
Vasiliy Kulikov
1
0.03%
1
1.03%
Adrian Bunk
1
0.03%
1
1.03%
Alan Cox
1
0.03%
1
1.03%
Al Viro
1
0.03%
1
1.03%
Ian Morris
1
0.03%
1
1.03%
Total
2939
100.00%
97
100.00%
Directory: net/ipv4

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