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Release 4.11 net/ipv6/xfrm6_mode_beet.c

Directory: net/ipv6
/*
 * xfrm6_mode_beet.c - BEET mode encapsulation for IPv6.
 *
 * Copyright (c) 2006 Diego Beltrami <diego.beltrami@gmail.com>
 *                    Miika Komu     <miika@iki.fi>
 *                    Herbert Xu     <herbert@gondor.apana.org.au>
 *                    Abhinav Pathak <abhinav.pathak@hiit.fi>
 *                    Jeff Ahrenholz <ahrenholz@gmail.com>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dsfield.h>
#include <net/dst.h>
#include <net/inet_ecn.h>
#include <net/ipv6.h>
#include <net/xfrm.h>


static void xfrm6_beet_make_header(struct sk_buff *skb) { struct ipv6hdr *iph = ipv6_hdr(skb); iph->version = 6; memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, sizeof(iph->flow_lbl)); iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol; ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos); iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu84100.00%1100.00%
Total84100.00%1100.00%

/* Add encapsulation header. * * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt. */
static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb) { struct ipv6hdr *top_iph; struct ip_beet_phdr *ph; int optlen, hdr_len; hdr_len = 0; optlen = XFRM_MODE_SKB_CB(skb)->optlen; if (unlikely(optlen)) hdr_len += IPV4_BEET_PHMAXLEN - (optlen & 4); skb_set_network_header(skb, -x->props.header_len - hdr_len); if (x->sel.family != AF_INET6) skb->network_header += IPV4_BEET_PHMAXLEN; skb->mac_header = skb->network_header + offsetof(struct ipv6hdr, nexthdr); skb->transport_header = skb->network_header + sizeof(*top_iph); ph = (struct ip_beet_phdr *)__skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl-hdr_len); xfrm6_beet_make_header(skb); top_iph = ipv6_hdr(skb); if (unlikely(optlen)) { BUG_ON(optlen < 0); ph->padlen = 4 - (optlen & 4); ph->hdrlen = optlen / 8; ph->nexthdr = top_iph->nexthdr; if (ph->padlen) memset(ph + 1, IPOPT_NOP, ph->padlen); top_iph->nexthdr = IPPROTO_BEETPH; } top_iph->saddr = *(struct in6_addr *)&x->props.saddr; top_iph->daddr = *(struct in6_addr *)&x->id.daddr; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Joakim Koskela13652.31%110.00%
Diego Beltrami6223.85%110.00%
Herbert Xu5721.92%660.00%
Alexey Dobriyan41.54%110.00%
Arnaldo Carvalho de Melo10.38%110.00%
Total260100.00%10100.00%


static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb) { struct ipv6hdr *ip6h; int size = sizeof(struct ipv6hdr); int err; err = skb_cow_head(skb, size + skb->mac_len); if (err) goto out; __skb_push(skb, size); skb_reset_network_header(skb); skb_mac_header_rebuild(skb); xfrm6_beet_make_header(skb); ip6h = ipv6_hdr(skb); ip6h->payload_len = htons(skb->len - size); ip6h->daddr = x->sel.daddr.in6; ip6h->saddr = x->sel.saddr.in6; err = 0; out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Diego Beltrami9876.56%112.50%
Herbert Xu1814.06%112.50%
Arnaldo Carvalho de Melo75.47%337.50%
Alexey Dobriyan21.56%112.50%
Jiri Benc21.56%112.50%
Eric Dumazet10.78%112.50%
Total128100.00%8100.00%

static struct xfrm_mode xfrm6_beet_mode = { .input2 = xfrm6_beet_input, .input = xfrm_prepare_input, .output2 = xfrm6_beet_output, .output = xfrm6_prepare_output, .owner = THIS_MODULE, .encap = XFRM_MODE_BEET, .flags = XFRM_MODE_FLAG_TUNNEL, };
static int __init xfrm6_beet_init(void) { return xfrm_register_mode(&xfrm6_beet_mode, AF_INET6); }

Contributors

PersonTokensPropCommitsCommitProp
Diego Beltrami18100.00%1100.00%
Total18100.00%1100.00%


static void __exit xfrm6_beet_exit(void) { int err; err = xfrm_unregister_mode(&xfrm6_beet_mode, AF_INET6); BUG_ON(err); }

Contributors

PersonTokensPropCommitsCommitProp
Diego Beltrami27100.00%1100.00%
Total27100.00%1100.00%

module_init(xfrm6_beet_init); module_exit(xfrm6_beet_exit); MODULE_LICENSE("GPL"); MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_BEET);

Overall Contributors

PersonTokensPropCommitsCommitProp
Diego Beltrami28346.17%16.25%
Herbert Xu17728.87%850.00%
Joakim Koskela13622.19%16.25%
Arnaldo Carvalho de Melo81.31%318.75%
Alexey Dobriyan60.98%16.25%
Jiri Benc20.33%16.25%
Eric Dumazet10.16%16.25%
Total613100.00%16100.00%
Directory: net/ipv6
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