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/*
* IPSEC tunneling code
* Copyright (C) 1996, 1997 John Ioannidis.
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Richard Guy Briggs.
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: ipsec_xmit.h 3265 2007-10-08 19:52:55Z andreas $
*/
#include "freeswan/ipsec_sa.h"
enum ipsec_xmit_value
{
IPSEC_XMIT_STOLEN=2,
IPSEC_XMIT_PASS=1,
IPSEC_XMIT_OK=0,
IPSEC_XMIT_ERRMEMALLOC=-1,
IPSEC_XMIT_ESP_BADALG=-2,
IPSEC_XMIT_BADPROTO=-3,
IPSEC_XMIT_ESP_PUSHPULLERR=-4,
IPSEC_XMIT_BADLEN=-5,
IPSEC_XMIT_AH_BADALG=-6,
IPSEC_XMIT_SAIDNOTFOUND=-7,
IPSEC_XMIT_SAIDNOTLIVE=-8,
IPSEC_XMIT_REPLAYROLLED=-9,
IPSEC_XMIT_LIFETIMEFAILED=-10,
IPSEC_XMIT_CANNOTFRAG=-11,
IPSEC_XMIT_MSSERR=-12,
IPSEC_XMIT_ERRSKBALLOC=-13,
IPSEC_XMIT_ENCAPFAIL=-14,
IPSEC_XMIT_NODEV=-15,
IPSEC_XMIT_NOPRIVDEV=-16,
IPSEC_XMIT_NOPHYSDEV=-17,
IPSEC_XMIT_NOSKB=-18,
IPSEC_XMIT_NOIPV6=-19,
IPSEC_XMIT_NOIPOPTIONS=-20,
IPSEC_XMIT_TTLEXPIRED=-21,
IPSEC_XMIT_BADHHLEN=-22,
IPSEC_XMIT_PUSHPULLERR=-23,
IPSEC_XMIT_ROUTEERR=-24,
IPSEC_XMIT_RECURSDETECT=-25,
IPSEC_XMIT_IPSENDFAILURE=-26,
#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
IPSEC_XMIT_ESPUDP=-27,
#endif
};
struct ipsec_xmit_state
{
struct sk_buff *skb; /* working skb pointer */
struct device *dev; /* working dev pointer */
struct ipsecpriv *prv; /* Our device' private space */
struct sk_buff *oskb; /* Original skb pointer */
struct net_device_stats *stats; /* This device's statistics */
struct iphdr *iph; /* Our new IP header */
__u32 newdst; /* The other SG's IP address */
__u32 orgdst; /* Original IP destination address */
__u32 orgedst; /* 1st SG's IP address */
__u32 newsrc; /* The new source SG's IP address */
__u32 orgsrc; /* Original IP source address */
__u32 innersrc; /* Innermost IP source address */
int iphlen; /* IP header length */
int pyldsz; /* upper protocol payload size */
int headroom;
int tailroom;
int max_headroom; /* The extra header space needed */
int max_tailroom; /* The extra stuffing needed */
int ll_headroom; /* The extra link layer hard_header space needed */
int tot_headroom; /* The total header space needed */
int tot_tailroom; /* The totalstuffing needed */
__u8 *saved_header; /* saved copy of the hard header */
unsigned short sport, dport;
struct sockaddr_encap matcher; /* eroute search key */
struct eroute *eroute;
struct ipsec_sa *ipsp, *ipsq; /* ipsec_sa pointers */
char sa_txt[SATOA_BUF];
size_t sa_len;
int hard_header_stripped; /* has the hard header been removed yet? */
int hard_header_len;
struct device *physdev;
/* struct device *virtdev; */
short physmtu;
short mtudiff;
#ifdef NET_21
struct rtable *route;
#endif /* NET_21 */
struct sa_id outgoing_said;
#ifdef NET_21
int pass;
#endif /* NET_21 */
int error;
uint32_t eroute_pid;
struct ipsec_sa ips;
#ifdef CONFIG_IPSEC_NAT_TRAVERSAL
uint8_t natt_type;
uint8_t natt_head;
uint16_t natt_sport;
uint16_t natt_dport;
#endif
};
#if 0 /* save for alg refactorisation */
struct xform_functions
{
enum ipsec_xmit_value (*checks)(struct ipsec_xmit_state *ixs,
struct sk_buff *skb);
enum ipsec_xmit_value (*encrypt)(struct ipsec_xmit_state *ixs);
enum ipsec_xmit_value (*setup_auth)(struct ipsec_xmit_state *ixs,
struct sk_buff *skb,
__u32 *replay,
unsigned char **authenticator);
enum ipsec_xmit_value (*calc_auth)(struct ipsec_xmit_state *ixs,
struct sk_buff *skb);
};
#endif
enum ipsec_xmit_value
ipsec_xmit_sanity_check_dev(struct ipsec_xmit_state *ixs);
enum ipsec_xmit_value
ipsec_xmit_sanity_check_skb(struct ipsec_xmit_state *ixs);
enum ipsec_xmit_value
ipsec_xmit_encap_bundle(struct ipsec_xmit_state *ixs);
extern int ipsec_xmit_trap_count;
extern int ipsec_xmit_trap_sendcount;
extern void ipsec_extract_ports(struct iphdr * iph, struct sockaddr_encap * er);
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