cregit-Linux how code gets into the kernel

Release 4.8 net/ipv6/xfrm6_input.c

Directory: net/ipv6
/*
 * xfrm6_input.c: based on net/ipv4/xfrm4_input.c
 *
 * Authors:
 *      Mitsuru KANDA @USAGI
 *      Kazunori MIYAZAWA @USAGI
 *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
 *      YOSHIFUJI Hideaki @USAGI
 *              IPv6 support
 */

#include <linux/module.h>
#include <linux/string.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <net/ipv6.h>
#include <net/xfrm.h>




int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
{
	return xfrm6_extract_header(skb);
}


Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu21100.00%1100.00%


Total21100.00%1100.00%






int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
		  struct ip6_tnl *t)
{
	XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = t;
	XFRM_SPI_SKB_CB(skb)->family = AF_INET6;
	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
	return xfrm_input(skb, nexthdr, spi, 0);
}

Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu2841.18%650.00%


hideaki yoshifujihideaki yoshifuji1927.94%216.67%


alexey kodanevalexey kodanev1014.71%18.33%


nicolas dichtelnicolas dichtel68.82%18.33%


patrick mchardypatrick mchardy45.88%18.33%


al viroal viro11.47%18.33%


Total68100.00%12100.00%




EXPORT_SYMBOL(xfrm6_rcv_spi);




int xfrm6_transport_finish(struct sk_buff *skb, int async)
{
	skb_network_header(skb)[IP6CB(skb)->nhoff] =
		XFRM_MODE_SKB_CB(skb)->protocol;

#ifndef CONFIG_NETFILTER
	if (!async)
		return 1;
#endif

	ipv6_hdr(skb)->payload_len = htons(skb->len);
	__skb_push(skb, skb->data - skb_network_header(skb));

	NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING,
		dev_net(skb->dev), NULL, skb, skb->dev, NULL,
		ip6_rcv_finish);
	return -1;
}


Contributors
PersonTokensPropCommitsCommitProp
patrick mchardypatrick mchardy4341.35%218.18%


herbert xuherbert xu4240.38%327.27%


eric w. biedermaneric w. biederman76.73%19.09%


arnaldo carvalho de meloarnaldo carvalho de melo65.77%218.18%


hideaki yoshifujihideaki yoshifuji32.88%19.09%


david s. millerdavid s. miller21.92%19.09%


jan engelhardtjan engelhardt10.96%19.09%


Total104100.00%11100.00%






int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t)
{
	return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
			     0, t);
}

Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu2771.05%375.00%


nicolas dichtelnicolas dichtel1128.95%125.00%


Total38100.00%4100.00%




EXPORT_SYMBOL(xfrm6_rcv_tnl);




int xfrm6_rcv(struct sk_buff *skb)
{
	return xfrm6_rcv_tnl(skb, NULL);
}

Contributors
PersonTokensPropCommitsCommitProp
nicolas dichtelnicolas dichtel1583.33%150.00%


herbert xuherbert xu316.67%150.00%


Total18100.00%2100.00%




EXPORT_SYMBOL(xfrm6_rcv);



int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
		     xfrm_address_t *saddr, u8 proto)
{
	struct net *net = dev_net(skb->dev);
	struct xfrm_state *x = NULL;
	int i = 0;

	/* Allocate new secpath or COW existing one. */
	if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
		struct sec_path *sp;

		sp = secpath_dup(skb->sp);
		if (!sp) {
			XFRM_INC_STATS(net, LINUX_MIB_XFRMINERROR);
			goto drop;
		}
		if (skb->sp)
			secpath_put(skb->sp);
		skb->sp = sp;
	}

	if (1 + skb->sp->len == XFRM_MAX_DEPTH) {
		XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR);
		goto drop;
	}

	for (i = 0; i < 3; i++) {
		xfrm_address_t *dst, *src;

		switch (i) {
		case 0:
			dst = daddr;
			src = saddr;
			break;
		case 1:
			/* lookup state with wild-card source address */
			dst = daddr;
			src = (xfrm_address_t *)&in6addr_any;
			break;
		default:
			/* lookup state with wild-card addresses */
			dst = (xfrm_address_t *)&in6addr_any;
			src = (xfrm_address_t *)&in6addr_any;
			break;
		}

		x = xfrm_state_lookup_byaddr(net, skb->mark, dst, src, proto, AF_INET6);
		if (!x)
			continue;

		spin_lock(&x->lock);

		if ((!i || (x->props.flags & XFRM_STATE_WILDRECV)) &&
		    likely(x->km.state == XFRM_STATE_VALID) &&
		    !xfrm_state_check_expire(x)) {
			spin_unlock(&x->lock);
			if (x->type->input(x, skb) > 0) {
				/* found a valid state */
				break;
			}
		} else
			spin_unlock(&x->lock);

		xfrm_state_put(x);
		x = NULL;
	}

	if (!x) {
		XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES);
		xfrm_audit_state_notfound_simple(skb, AF_INET6);
		goto drop;
	}

	skb->sp->xvec[skb->sp->len++] = x;

	spin_lock(&x->lock);

	x->curlft.bytes += skb->len;
	x->curlft.packets++;

	spin_unlock(&x->lock);

	return 1;

drop:
	return -1;
}

Contributors
PersonTokensPropCommitsCommitProp
masahide nakamuramasahide nakamura34181.97%337.50%


hideaki yoshifujihideaki yoshifuji4410.58%112.50%


alexey dobriyanalexey dobriyan204.81%225.00%


paul moorepaul moore71.68%112.50%


jamal hadi salimjamal hadi salim40.96%112.50%


Total416100.00%8100.00%




EXPORT_SYMBOL(xfrm6_input_addr);

Overall Contributors
PersonTokensPropCommitsCommitProp
masahide nakamuramasahide nakamura34148.44%39.09%


herbert xuherbert xu12918.32%1030.30%


hideaki yoshifujihideaki yoshifuji8512.07%412.12%


patrick mchardypatrick mchardy537.53%39.09%


nicolas dichtelnicolas dichtel375.26%13.03%


alexey dobriyanalexey dobriyan202.84%26.06%


alexey kodanevalexey kodanev101.42%13.03%


eric w. biedermaneric w. biederman70.99%13.03%


paul moorepaul moore70.99%13.03%


arnaldo carvalho de meloarnaldo carvalho de melo60.85%26.06%


jamal hadi salimjamal hadi salim40.57%13.03%


david s. millerdavid s. miller20.28%13.03%


ian morrisian morris10.14%13.03%


al viroal viro10.14%13.03%


jan engelhardtjan engelhardt10.14%13.03%


Total704100.00%33100.00%

  
Directory: net/ipv6



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