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/* $OpenBSD: pppoe.h,v 1.7 2015/12/05 16:10:31 yasuoka Exp $ */
/*-
* Copyright (c) 2009 Internet Initiative Japan Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef PPPOE_H
#define PPPOE_H 1
/*
* Constant variables and types from PPPoE protocol (RFC 2516)
*/
#define PPPOE_RFC2516_TYPE 0x01
#define PPPOE_RFC2516_VER 0x01
/** The PPPoE Active Discovery Initiation (PADI) packet */
#define PPPOE_CODE_PADI 0x09
/** The PPPoE Active Discovery Offer (PADO) packet */
#define PPPOE_CODE_PADO 0x07
/** The PPPoE Active Discovery Request (PADR) packet */
#define PPPOE_CODE_PADR 0x19
/** The PPPoE Active Discovery Session-confirmation (PADS) packet */
#define PPPOE_CODE_PADS 0x65
/** The PPPoE Active Discovery Terminate (PADT) packet */
#define PPPOE_CODE_PADT 0xa7
#define PPPOE_TAG_END_OF_LIST 0x0000
#define PPPOE_TAG_SERVICE_NAME 0x0101
#define PPPOE_TAG_AC_NAME 0x0102
#define PPPOE_TAG_HOST_UNIQ 0x0103
#define PPPOE_TAG_AC_COOKIE 0x0104
#define PPPOE_TAG_VENDOR_SPECIFIC 0x0105
#define PPPOE_TAG_RELAY_SESSION_ID 0x0110
#define PPPOE_TAG_SERVICE_NAME_ERROR 0x0201
#define PPPOE_TAG_AC_SYSTEM_ERROR 0x0202
#define PPPOE_TAG_GENERIC_ERROR 0x0203
/** PPPoE Protocol Header */
struct pppoe_header {
#if BYTE_ORDER == BIG_ENDIAN
uint8_t ver:4, type:4;
#else
uint8_t type:4, ver:4;
#endif
uint8_t code;
uint16_t session_id;
uint16_t length;
} __attribute__((__packed__));
/** PPPoE TLV Header */
struct pppoe_tlv {
uint16_t type;
uint16_t length;
uint8_t value[0];
} __attribute__((__packed__));
/*
* Constant variables and types for implementions
*/
#include "pppoe_conf.h"
/** Default data link layer */
#define PPPOED_DEFAULT_LAYER2_LABEL "PPPoE"
#define PPPOED_CONFIG_BUFSIZ 65535
#define PPPOED_HOSTUNIQ_LEN 64
#define PPPOED_PHY_LABEL_SIZE 16
/*
* pppoed status
*/
#define PPPOED_STATE_INIT 0 /** Initial */
#define PPPOED_STATE_RUNNING 1 /** Running */
#define PPPOED_STATE_STOPPED 2 /** Stopped */
#define pppoed_is_stopped(pppoed) \
(((pppoed)->state == PPPOED_STATE_STOPPED)? 1 : 0)
#define pppoed_is_running(pppoed) \
(((pppoed)->state == PPPOED_STATE_RUNNING)? 1 : 0)
#define PPPOED_LISTENER_INVALID_INDEX UINT16_MAX
/** PPPoE listener type */
typedef struct _pppoed_listener {
/** Descriptor of bpf(4) */
int bpf;
/** Context of event(3) for the descriptor of bpf(4) */
struct event ev_bpf;
/** Pointer to base PPPoE daemon */
struct _pppoed *self;
/** Ethernet address */
u_char ether_addr[ETHER_ADDR_LEN];
/** Listener index numbered by the base PPPoE daemon */
uint16_t index;
/** Listening interface name */
char listen_ifname[IF_NAMESIZE];
/** Label of physcal layer */
char tun_name[PPPOED_PHY_LABEL_SIZE];
/** Configuration */
struct pppoe_conf *conf;
} pppoed_listener;
/** PPPoE daemon type */
typedef struct _pppoed {
/** PPPoE daemon Id */
int id;
/** List of {@link pppoed_listener} */
slist listener;
/** Status of this daemon */
int state;
/** Hashmap that maps from session number to {@link pppoe_session} */
hash_table *session_hash;
/** List of free session numbers */
slist session_free_list;
/** Hashmap that contains uniq cookie value */
hash_table *acookie_hash;
/** Next cookie number */
uint32_t acookie_next;
/** Flags */
uint32_t
listen_incomplete:1,
reserved:31;
} pppoed;
/** PPPoE session type */
typedef struct _pppoe_session {
/** State of this session */
int state;
/** Pointer to base {@link pppoed *} PPPoE daemon */
pppoed *pppoed;
/** Pointer to the PPP context */
void *ppp;
/** Session id */
uint16_t session_id;
/** Cookie number */
int acookie;
/** Peer ethernet address */
u_char ether_addr[ETHER_ADDR_LEN];
/** Index of listener */
uint16_t listener_index;
/** Cache for ethernet frame header */
struct ether_header ehdr;
int lcp_echo_interval; /* XXX can remove */
int lcp_echo_max_failure; /* XXX can remove */
/** Context of event(3) for disposing */
struct event ev_disposing;
} pppoe_session;
#define PPPOE_SESSION_STATE_INIT 0 /** Inital */
#define PPPOE_SESSION_STATE_RUNNING 1 /** Running */
#define PPPOE_SESSION_STATE_DISPOSING 2 /** Disposing */
#define pppoed_need_polling(pppoed) \
(((pppoed)->listen_incomplete != 0)? 1 : 0)
#ifdef __cplusplus
extern "C" {
#endif
int pppoe_session_init (pppoe_session *, pppoed *, int, int, u_char *);
void pppoe_session_fini (pppoe_session *);
void pppoe_session_stop (pppoe_session *);
int pppoe_session_recv_PADR (pppoe_session *, slist *);
int pppoe_session_recv_PADT (pppoe_session *, slist *);
void pppoe_session_input (pppoe_session *, u_char *, int);
void pppoe_session_disconnect (pppoe_session *);
int pppoed_add_listener (pppoed *, int, const char *, const char *);
int pppoed_reload_listeners(pppoed *);
int pppoed_init (pppoed *);
int pppoed_start (pppoed *);
void pppoed_stop (pppoed *);
void pppoed_uninit (pppoed *);
void pppoed_pppoe_session_close_notify(pppoed *, pppoe_session *);
const char *pppoed_tlv_value_string(struct pppoe_tlv *);
int pppoed_reload(pppoed *, struct pppoe_confs *);
#ifdef __cplusplus
}
#endif
#endif
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