123 lines
2.4 KiB
C
123 lines
2.4 KiB
C
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/*
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* Copyright (c) 2015 Tom Herbert <tom@herbertland.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#ifndef __ILA_H
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#define __ILA_H
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#include <linux/errno.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/socket.h>
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <net/checksum.h>
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#include <net/ip.h>
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#include <net/protocol.h>
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#include <uapi/linux/ila.h>
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struct ila_locator {
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union {
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__u8 v8[8];
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__be16 v16[4];
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__be32 v32[2];
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__be64 v64;
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};
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};
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struct ila_identifier {
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union {
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struct {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 __space:4;
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u8 csum_neutral:1;
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u8 type:3;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 type:3;
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u8 csum_neutral:1;
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u8 __space:4;
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#else
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#error "Adjust your <asm/byteorder.h> defines"
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#endif
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u8 __space2[7];
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};
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__u8 v8[8];
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__be16 v16[4];
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__be32 v32[2];
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__be64 v64;
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};
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};
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enum {
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ILA_ATYPE_IID = 0,
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ILA_ATYPE_LUID,
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ILA_ATYPE_VIRT_V4,
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ILA_ATYPE_VIRT_UNI_V6,
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ILA_ATYPE_VIRT_MULTI_V6,
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ILA_ATYPE_RSVD_1,
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ILA_ATYPE_RSVD_2,
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ILA_ATYPE_RSVD_3,
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};
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#define CSUM_NEUTRAL_FLAG htonl(0x10000000)
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struct ila_addr {
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union {
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struct in6_addr addr;
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struct {
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struct ila_locator loc;
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struct ila_identifier ident;
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};
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};
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};
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static inline struct ila_addr *ila_a2i(struct in6_addr *addr)
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{
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return (struct ila_addr *)addr;
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}
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static inline bool ila_addr_is_ila(struct ila_addr *iaddr)
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{
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return (iaddr->ident.type != ILA_ATYPE_IID);
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}
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struct ila_params {
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struct ila_locator locator;
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struct ila_locator locator_match;
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__wsum csum_diff;
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u8 csum_mode;
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};
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static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to)
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{
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__be32 diff[] = {
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~from[0], ~from[1], to[0], to[1],
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};
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return csum_partial(diff, sizeof(diff), 0);
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}
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static inline bool ila_csum_neutral_set(struct ila_identifier ident)
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{
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return !!(ident.csum_neutral);
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}
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void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
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bool set_csum_neutral);
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void ila_init_saved_csum(struct ila_params *p);
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int ila_lwt_init(void);
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void ila_lwt_fini(void);
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int ila_xlat_init(void);
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void ila_xlat_fini(void);
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#endif /* __ILA_H */
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