cregit-Linux how code gets into the kernel

Release 4.8 net/ipv6/xfrm6_output.c

Directory: net/ipv6
/*
 * xfrm6_output.c - Common IPsec encapsulation code for IPv6.
 * Copyright (C) 2002 USAGI/WIDE Project
 * Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * 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.
 */

#include <linux/if_ether.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/icmpv6.h>
#include <linux/netfilter_ipv6.h>
#include <net/dst.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/xfrm.h>




int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
			  u8 **prevhdr)
{
	return ip6_find_1stfragopt(skb, prevhdr);
}

Contributors
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masahide nakamuramasahide nakamura28100.00%1100.00%


Total28100.00%1100.00%




EXPORT_SYMBOL(xfrm6_find_1stfragopt);




static int xfrm6_local_dontfrag(struct sk_buff *skb)
{
	int proto;
	struct sock *sk = skb->sk;

	if (sk) {
		if (sk->sk_family != AF_INET6)
			return 0;

		proto = sk->sk_protocol;
		if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
			return inet6_sk(sk)->dontfrag;
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert5683.58%150.00%


hannes frederic sowahannes frederic sowa1116.42%150.00%


Total67100.00%2100.00%






static void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu)
{
	struct flowi6 fl6;
	struct sock *sk = skb->sk;

	fl6.flowi6_oif = sk->sk_bound_dev_if;
	fl6.daddr = ipv6_hdr(skb)->daddr;

	ipv6_local_rxpmtu(sk, &fl6, mtu);
}


Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert5598.21%150.00%


alexey dobriyanalexey dobriyan11.79%150.00%


Total56100.00%2100.00%






void xfrm6_local_error(struct sk_buff *skb, u32 mtu)
{
	struct flowi6 fl6;
	const struct ipv6hdr *hdr;
	struct sock *sk = skb->sk;

	hdr = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
	fl6.fl6_dport = inet_sk(sk)->inet_dport;
	fl6.daddr = hdr->daddr;

	ipv6_local_error(sk, EMSGSIZE, &fl6, mtu);
}


Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert5569.62%133.33%


hannes frederic sowahannes frederic sowa2329.11%133.33%


alexey dobriyanalexey dobriyan11.27%133.33%


Total79100.00%3100.00%






static int xfrm6_tunnel_check_size(struct sk_buff *skb)
{
	int mtu, ret = 0;
	struct dst_entry *dst = skb_dst(skb);

	mtu = dst_mtu(dst);
	if (mtu < IPV6_MIN_MTU)
		mtu = IPV6_MIN_MTU;

	if (!skb->ignore_df && skb->len > mtu) {
		skb->dev = dst->dev;
		skb->protocol = htons(ETH_P_IPV6);

		if (xfrm6_local_dontfrag(skb))
			xfrm6_local_rxpmtu(skb, mtu);
		else if (skb->sk)
			xfrm_local_error(skb, mtu);
		else
			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
		ret = -EMSGSIZE;
	}

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu8366.40%444.44%


steffen klassertsteffen klassert3729.60%222.22%


eric dumazeteric dumazet32.40%111.11%


hannes frederic sowahannes frederic sowa10.80%111.11%


americo wangamerico wang10.80%111.11%


Total125100.00%9100.00%






int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
{
	int err;

	err = xfrm6_tunnel_check_size(skb);
	if (err)
		return err;

	XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr;

	return xfrm6_extract_header(skb);
}


Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu52100.00%5100.00%


Total52100.00%5100.00%






int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
{
	int err;

	err = xfrm_inner_extract_output(x, skb);
	if (err)
		return err;

	skb->ignore_df = 1;
	skb->protocol = htons(ETH_P_IPV6);

	return x->outer_mode->output2(x, skb);
}

Contributors
PersonTokensPropCommitsCommitProp
herbert xuherbert xu4573.77%450.00%


steffen klassertsteffen klassert1422.95%225.00%


kazunori miyazawakazunori miyazawa11.64%112.50%


americo wangamerico wang11.64%112.50%


Total61100.00%8100.00%




EXPORT_SYMBOL(xfrm6_prepare_output);




int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb)
{
	memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));

#ifdef CONFIG_NETFILTER
	IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
#endif

	return xfrm_output(sk, skb);
}


Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert2850.00%116.67%


herbert xuherbert xu1628.57%350.00%


david s. millerdavid s. miller712.50%116.67%


patrick mchardypatrick mchardy58.93%116.67%


Total56100.00%6100.00%






static int __xfrm6_output_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	struct xfrm_state *x = skb_dst(skb)->xfrm;

	return x->outer_mode->afinfo->output_finish(sk, skb);
}


Contributors
PersonTokensPropCommitsCommitProp
eric w. biedermaneric w. biederman47100.00%1100.00%


Total47100.00%1100.00%






static int __xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	struct dst_entry *dst = skb_dst(skb);
	struct xfrm_state *x = dst->xfrm;
	int mtu;
	bool toobig;

#ifdef CONFIG_NETFILTER
	if (!x) {
		IP6CB(skb)->flags |= IP6SKB_REROUTED;
		return dst_output(net, sk, skb);
	}
#endif

	if (x->props.mode != XFRM_MODE_TUNNEL)
		goto skip_frag;

	if (skb->protocol == htons(ETH_P_IPV6))
		mtu = ip6_skb_dst_mtu(skb);
	else
		mtu = dst_mtu(skb_dst(skb));

	toobig = skb->len > mtu && !skb_is_gso(skb);

	if (toobig && xfrm6_local_dontfrag(skb)) {
		xfrm6_local_rxpmtu(skb, mtu);
		return -EMSGSIZE;
	} else if (!skb->ignore_df && toobig && skb->sk) {
		xfrm_local_error(skb, mtu);
		return -EMSGSIZE;
	}

	if (toobig || dst_allfrag(skb_dst(skb)))
		return ip6_fragment(net, sk, skb,
				    __xfrm6_output_finish);

skip_frag:
	return x->outer_mode->afinfo->output_finish(sk, skb);
}


Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert8638.74%321.43%


david l stevensdavid l stevens5323.87%17.14%


herbert xuherbert xu3214.41%17.14%


hannes frederic sowahannes frederic sowa2812.61%321.43%


eric w. biedermaneric w. biederman114.95%428.57%


david s. millerdavid s. miller114.95%17.14%


americo wangamerico wang10.45%17.14%


Total222100.00%14100.00%






int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING,
			    net, sk, skb,  NULL, skb_dst(skb)->dev,
			    __xfrm6_output,
			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
}

Contributors
PersonTokensPropCommitsCommitProp
patrick mchardypatrick mchardy2543.86%220.00%


steffen klassertsteffen klassert1322.81%110.00%


eric dumazeteric dumazet814.04%220.00%


eric w. biedermaneric w. biederman712.28%220.00%


david s. millerdavid s. miller23.51%110.00%


jan engelhardtjan engelhardt11.75%110.00%


david l stevensdavid l stevens11.75%110.00%


Total57100.00%10100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
steffen klassertsteffen klassert34438.61%613.33%


herbert xuherbert xu25528.62%1533.33%


eric w. biedermaneric w. biederman657.30%613.33%


hannes frederic sowahannes frederic sowa637.07%48.89%


david l stevensdavid l stevens576.40%12.22%


patrick mchardypatrick mchardy353.93%36.67%


masahide nakamuramasahide nakamura283.14%12.22%


david s. millerdavid s. miller202.24%12.22%


eric dumazeteric dumazet111.23%24.44%


hideaki yoshifujihideaki yoshifuji60.67%24.44%


americo wangamerico wang30.34%12.22%


alexey dobriyanalexey dobriyan20.22%12.22%


kazunori miyazawakazunori miyazawa10.11%12.22%


jan engelhardtjan engelhardt10.11%12.22%


Total891100.00%45100.00%

  
Directory: net/ipv6



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