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Release 4.11 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

PersonTokensPropCommitsCommitProp
Masahide 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 Klassert5683.58%150.00%
Hannes 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 Klassert5598.21%150.00%
Alexey 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 Klassert5569.62%133.33%
Hannes Frederic Sowa2329.11%133.33%
Alexey 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 Xu8366.40%444.44%
Steffen Klassert3729.60%222.22%
Eric Dumazet32.40%111.11%
Hannes Frederic Sowa10.80%111.11%
Américo 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 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 Xu4573.77%450.00%
Steffen Klassert1422.95%225.00%
Américo Wang11.64%112.50%
Kazunori Miyazawa11.64%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 Klassert2850.00%116.67%
Herbert Xu1628.57%350.00%
David S. Miller712.50%116.67%
Patrick 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. Biedermann47100.00%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 Klassert8638.74%321.43%
David L Stevens5323.87%17.14%
Herbert Xu3214.41%17.14%
Hannes Frederic Sowa2812.61%321.43%
David S. Miller114.95%17.14%
Eric W. Biedermann114.95%428.57%
Américo 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 McHardy2543.86%220.00%
Steffen Klassert1322.81%110.00%
Eric Dumazet814.04%220.00%
Eric W. Biedermann712.28%220.00%
David S. Miller23.51%110.00%
Jan Engelhardt11.75%110.00%
David L Stevens11.75%110.00%
Total57100.00%10100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert34438.61%613.33%
Herbert Xu25528.62%1533.33%
Eric W. Biedermann657.30%613.33%
Hannes Frederic Sowa637.07%48.89%
David L Stevens576.40%12.22%
Patrick McHardy353.93%36.67%
Masahide Nakamura283.14%12.22%
David S. Miller202.24%12.22%
Eric Dumazet111.23%24.44%
Hideaki Yoshifuji / 吉藤英明60.67%24.44%
Américo Wang30.34%12.22%
Alexey Dobriyan20.22%12.22%
Jan Engelhardt10.11%12.22%
Kazunori Miyazawa10.11%12.22%
Total891100.00%45100.00%
Directory: net/ipv6
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