/net/ipv6/xfrm6_state.c

http://github.com/mirrors/linux · C · 59 lines · 39 code · 7 blank · 13 comment · 0 complexity · 9cf0a2f0f0cdadfe8741ceecb4140d32 MD5 · raw file 

    

  1. // SPDX-License-Identifier: GPL-2.0
    2. 

  2. /*
    3. 

  3.  * xfrm6_state.c: based on xfrm4_state.c
    4. 

  4.  *
    5. 

  5.  * Authors:
    6. 

  6.  *	Mitsuru KANDA @USAGI
    7. 

  7.  *	Kazunori MIYAZAWA @USAGI
    8. 

  8.  *	Kunihiro Ishiguro <kunihiro@ipinfusion.com>
    9. 

  9.  *		IPv6 support
    10. 

  10.  *	YOSHIFUJI Hideaki @USAGI
    11. 

  11.  *		Split up af-specific portion
    12. 

  12.  *
    13. 

  13.  */
    14. 

  14. 

  15. #include <net/xfrm.h>
    16. 

  16. #include <linux/pfkeyv2.h>
    17. 

  17. #include <linux/ipsec.h>
    18. 

  18. #include <linux/netfilter_ipv6.h>
    19. 

  19. #include <linux/export.h>
    20. 

  20. #include <net/dsfield.h>
    21. 

  21. #include <net/ipv6.h>
    22. 

  22. #include <net/addrconf.h>
    23. 

  23. 

  24. int xfrm6_extract_header(struct sk_buff *skb)
    25. 

  25. {
    26. 

  26. 	struct ipv6hdr *iph = ipv6_hdr(skb);
    27. 

  27. 

  28. 	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
    29. 

  29. 	XFRM_MODE_SKB_CB(skb)->id = 0;
    30. 

  30. 	XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
    31. 

  31. 	XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
    32. 

  32. 	XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
    33. 

  33. 	XFRM_MODE_SKB_CB(skb)->optlen = 0;
    34. 

  34. 	memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
    35. 

  35. 	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
    36. 

  36. 

  37. 	return 0;
    38. 

  38. }
    39. 

  39. 

  40. static struct xfrm_state_afinfo xfrm6_state_afinfo = {
    41. 

  41. 	.family			= AF_INET6,
    42. 

  42. 	.proto			= IPPROTO_IPV6,
    43. 

  43. 	.output			= xfrm6_output,
    44. 

  44. 	.output_finish		= xfrm6_output_finish,
    45. 

  45. 	.extract_input		= xfrm6_extract_input,
    46. 

  46. 	.extract_output		= xfrm6_extract_output,
    47. 

  47. 	.transport_finish	= xfrm6_transport_finish,
    48. 

  48. 	.local_error		= xfrm6_local_error,
    49. 

  49. };
    50. 

  50. 

  51. int __init xfrm6_state_init(void)
    52. 

  52. {
    53. 

  53. 	return xfrm_state_register_afinfo(&xfrm6_state_afinfo);
    54. 

  54. }
    55. 

  55. 

  56. void xfrm6_state_fini(void)
    57. 

  57. {
    58. 

  58. 	xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
    59. 

  59. }
    60.