/* $OpenBSD: pppoe.h,v 1.8 2021/03/29 03:54:39 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 /** Initial */ #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