LXR linux/net/ipv6/xfrm6

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * xfrm6_state.c: based on xfrm4_state.c
   4 *
   5 * Authors:
   6 *      Mitsuru KANDA @USAGI
   7 *      Kazunori MIYAZAWA @USAGI
   8 *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
   9 *              IPv6 support
  10 *      YOSHIFUJI Hideaki @USAGI
  11 *              Split up af-specific portion
  12 *
  13 */
  14
  15#include <net/xfrm.h>
  16#include <linux/pfkeyv2.h>
  17#include <linux/ipsec.h>
  18#include <linux/netfilter_ipv6.h>
  19#include <linux/export.h>
  20#include <net/dsfield.h>
  21#include <net/ipv6.h>
  22#include <net/addrconf.h>
  23
  24int xfrm6_extract_header(struct sk_buff *skb)
  25{
  26        struct ipv6hdr *iph = ipv6_hdr(skb);
  27
  28        XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
  29        XFRM_MODE_SKB_CB(skb)->id = 0;
  30        XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
  31        XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
  32        XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
  33        XFRM_MODE_SKB_CB(skb)->optlen = 0;
  34        memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
  35               sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
  36
  37        return 0;
  38}
  39
  40static struct xfrm_state_afinfo xfrm6_state_afinfo = {
  41        .family                 = AF_INET6,
  42        .proto                  = IPPROTO_IPV6,
  43        .output                 = xfrm6_output,
  44        .output_finish          = xfrm6_output_finish,
  45        .extract_input          = xfrm6_extract_input,
  46        .extract_output         = xfrm6_extract_output,
  47        .transport_finish       = xfrm6_transport_finish,
  48        .local_error            = xfrm6_local_error,
  49};
  50
  51int __init xfrm6_state_init(void)
  52{
  53        return xfrm_state_register_afinfo(&xfrm6_state_afinfo);
  54}
  55
  56void xfrm6_state_fini(void)
  57{
  58        xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
  59}
  60