+++ /dev/null
-/***********************************************************************
-*
-* pppoe.h
-*
-* Declaration of various PPPoE constants
-*
-* Copyright (C) 2000 Roaring Penguin Software Inc.
-*
-* This program may be distributed according to the terms of the GNU
-* General Public License, version 2 or (at your option) any later version.
-*
-* $Id: pppoe.h,v 1.4 2008/06/15 04:35:50 paulus Exp $
-*
-***********************************************************************/
-
-#include "config.h"
-
-#include <stdio.h> /* For FILE */
-#include <sys/types.h> /* For pid_t */
-#include <ctype.h>
-#include <string.h>
-
-#include "pppd/pppd.h" /* For error */
-
-/* How do we access raw Ethernet devices? */
-#undef USE_LINUX_PACKET
-#undef USE_BPF
-
-#if defined(HAVE_NETPACKET_PACKET_H) || defined(HAVE_LINUX_IF_PACKET_H)
-#define USE_LINUX_PACKET 1
-#elif defined(HAVE_SYS_DLPI_H)
-#define USE_DLPI
-#elif defined(HAVE_NET_BPF_H)
-#define USE_BPF 1
-#endif
-
-/* Sanity check */
-#if !defined(USE_BPF) && !defined(USE_LINUX_PACKET) && !defined(USE_DLPI)
-#error Unknown method for accessing raw Ethernet frames
-#endif
-
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-
-/* This has to be included before Linux 4.8's linux/in.h
- * gets dragged in. */
-#include <netinet/in.h>
-
-/* Ugly header files on some Linux boxes... */
-#if defined(HAVE_LINUX_IF_H)
-#include <linux/if.h>
-#elif defined(HAVE_NET_IF_H)
-#include <net/if.h>
-#endif
-
-#ifdef HAVE_NET_IF_TYPES_H
-#include <net/if_types.h>
-#endif
-
-#define BPF_BUFFER_IS_EMPTY 1
-#define BPF_BUFFER_HAS_DATA 0
-
-/* Define various integer types -- assumes a char is 8 bits */
-#if SIZEOF_UNSIGNED_SHORT == 2
-typedef unsigned short UINT16_t;
-#elif SIZEOF_UNSIGNED_INT == 2
-typedef unsigned int UINT16_t;
-#else
-#error Could not find a 16-bit integer type
-#endif
-
-#if SIZEOF_UNSIGNED_SHORT == 4
-typedef unsigned short UINT32_t;
-#elif SIZEOF_UNSIGNED_INT == 4
-typedef unsigned int UINT32_t;
-#elif SIZEOF_UNSIGNED_LONG == 4
-typedef unsigned long UINT32_t;
-#else
-#error Could not find a 32-bit integer type
-#endif
-
-#ifdef HAVE_LINUX_IF_ETHER_H
-#include <linux/if_ether.h>
-#else
-
-#ifdef HAVE_NETINET_IF_ETHER_H
-#include <sys/types.h>
-
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifndef HAVE_SYS_DLPI_H
-#include <netinet/if_ether.h>
-#endif
-#endif
-#endif
-
-/* Ethernet frame types according to RFC 2516 */
-#define ETH_PPPOE_DISCOVERY 0x8863
-#define ETH_PPPOE_SESSION 0x8864
-
-/* But some brain-dead peers disobey the RFC, so frame types are variables */
-extern UINT16_t Eth_PPPOE_Discovery;
-extern UINT16_t Eth_PPPOE_Session;
-
-/* PPPoE codes */
-#define CODE_PADI 0x09
-#define CODE_PADO 0x07
-#define CODE_PADR 0x19
-#define CODE_PADS 0x65
-#define CODE_PADT 0xA7
-
-/* Extensions from draft-carrel-info-pppoe-ext-00 */
-/* I do NOT like PADM or PADN, but they are here for completeness */
-#define CODE_PADM 0xD3
-#define CODE_PADN 0xD4
-
-#define CODE_SESS 0x00
-
-/* PPPoE Tags */
-#define TAG_END_OF_LIST 0x0000
-#define TAG_SERVICE_NAME 0x0101
-#define TAG_AC_NAME 0x0102
-#define TAG_HOST_UNIQ 0x0103
-#define TAG_AC_COOKIE 0x0104
-#define TAG_VENDOR_SPECIFIC 0x0105
-#define TAG_RELAY_SESSION_ID 0x0110
-#define TAG_PPP_MAX_PAYLOAD 0x0120
-#define TAG_SERVICE_NAME_ERROR 0x0201
-#define TAG_AC_SYSTEM_ERROR 0x0202
-#define TAG_GENERIC_ERROR 0x0203
-
-/* Extensions from draft-carrel-info-pppoe-ext-00 */
-/* I do NOT like these tags one little bit */
-#define TAG_HURL 0x111
-#define TAG_MOTM 0x112
-#define TAG_IP_ROUTE_ADD 0x121
-
-/* Discovery phase states */
-#define STATE_SENT_PADI 0
-#define STATE_RECEIVED_PADO 1
-#define STATE_SENT_PADR 2
-#define STATE_SESSION 3
-#define STATE_TERMINATED 4
-
-/* How many PADI/PADS attempts? */
-#define MAX_PADI_ATTEMPTS 3
-
-/* Initial timeout for PADO/PADS */
-#define PADI_TIMEOUT 5
-
-/* States for scanning PPP frames */
-#define STATE_WAITFOR_FRAME_ADDR 0
-#define STATE_DROP_PROTO 1
-#define STATE_BUILDING_PACKET 2
-
-/* Special PPP frame characters */
-#define FRAME_ESC 0x7D
-#define FRAME_FLAG 0x7E
-#define FRAME_ADDR 0xFF
-#define FRAME_CTRL 0x03
-#define FRAME_ENC 0x20
-
-#define IPV4ALEN 4
-#define SMALLBUF 256
-
-/* There are other fixed-size buffers preventing
- this from being increased to 16110. The buffer
- sizes would need to be properly de-coupled from
- the default MRU. For now, getting up to 1500 is
- enough. */
-#define ETH_JUMBO_LEN 1508
-
-/* A PPPoE Packet, including Ethernet headers */
-typedef struct PPPoEPacketStruct {
- struct ethhdr ethHdr; /* Ethernet header */
- unsigned int vertype:8; /* PPPoE Version and Type (must both be 1) */
- unsigned int code:8; /* PPPoE code */
- unsigned int session:16; /* PPPoE session */
- unsigned int length:16; /* Payload length */
- unsigned char payload[ETH_JUMBO_LEN]; /* A bit of room to spare */
-} PPPoEPacket;
-
-#define PPPOE_VER(vt) ((vt) >> 4)
-#define PPPOE_TYPE(vt) ((vt) & 0xf)
-#define PPPOE_VER_TYPE(v, t) (((v) << 4) | (t))
-
-/* Header size of a PPPoE packet */
-#define PPPOE_OVERHEAD 6 /* type, code, session, length */
-#define HDR_SIZE (sizeof(struct ethhdr) + PPPOE_OVERHEAD)
-#define MAX_PPPOE_PAYLOAD (ETH_JUMBO_LEN - PPPOE_OVERHEAD)
-#define PPP_OVERHEAD 2 /* protocol */
-#define MAX_PPPOE_MTU (MAX_PPPOE_PAYLOAD - PPP_OVERHEAD)
-#define TOTAL_OVERHEAD (PPPOE_OVERHEAD + PPP_OVERHEAD)
-#define ETH_PPPOE_MTU (ETH_DATA_LEN - TOTAL_OVERHEAD)
-
-/* PPPoE Tag */
-
-typedef struct PPPoETagStruct {
- unsigned int type:16; /* tag type */
- unsigned int length:16; /* Length of payload */
- unsigned char payload[ETH_JUMBO_LEN]; /* A LOT of room to spare */
-} PPPoETag;
-/* Header size of a PPPoE tag */
-#define TAG_HDR_SIZE 4
-
-/* Chunk to read from stdin */
-#define READ_CHUNK 4096
-
-/* Function passed to parsePacket */
-typedef void ParseFunc(UINT16_t type,
- UINT16_t len,
- unsigned char *data,
- void *extra);
-
-#define PPPINITFCS16 0xffff /* Initial FCS value */
-
-/* Keep track of the state of a connection -- collect everything in
- one spot */
-
-typedef struct PPPoEConnectionStruct {
- int discoveryState; /* Where we are in discovery */
- int discoverySocket; /* Raw socket for discovery frames */
- int sessionSocket; /* Raw socket for session frames */
- unsigned char myEth[ETH_ALEN]; /* My MAC address */
- unsigned char peerEth[ETH_ALEN]; /* Peer's MAC address */
- unsigned char req_peer_mac[ETH_ALEN]; /* required peer MAC address */
- unsigned char req_peer; /* require mac addr to match req_peer_mac */
- UINT16_t session; /* Session ID */
- char *ifName; /* Interface name */
- char *serviceName; /* Desired service name, if any */
- char *acName; /* Desired AC name, if any */
- int synchronous; /* Use synchronous PPP */
- PPPoETag hostUniq; /* Use Host-Uniq tag */
- int printACNames; /* Just print AC names */
- FILE *debugFile; /* Debug file for dumping packets */
- int numPADOs; /* Number of PADO packets received */
- PPPoETag cookie; /* We have to send this if we get it */
- PPPoETag relayId; /* Ditto */
- int error; /* Error packet received */
- int debug; /* Set to log packets sent and received */
- int discoveryTimeout; /* Timeout for discovery packets */
- int discoveryAttempts; /* Number of discovery attempts */
- int seenMaxPayload;
- int mtu; /* Stored MTU */
- int mru; /* Stored MRU */
-} PPPoEConnection;
-
-/* Structure used to determine acceptable PADO or PADS packet */
-struct PacketCriteria {
- PPPoEConnection *conn;
- int acNameOK;
- int serviceNameOK;
- int seenACName;
- int seenServiceName;
-};
-
-/* Function Prototypes */
-UINT16_t etherType(PPPoEPacket *packet);
-int openInterface(char const *ifname, UINT16_t type, unsigned char *hwaddr);
-int sendPacket(PPPoEConnection *conn, int sock, PPPoEPacket *pkt, int size);
-int receivePacket(int sock, PPPoEPacket *pkt, int *size);
-void fatalSys(char const *str);
-void rp_fatal(char const *str);
-void printErr(char const *str);
-void sysErr(char const *str);
-void dumpPacket(FILE *fp, PPPoEPacket *packet, char const *dir);
-void dumpHex(FILE *fp, unsigned char const *buf, int len);
-int parsePacket(PPPoEPacket *packet, ParseFunc *func, void *extra);
-void parseLogErrs(UINT16_t typ, UINT16_t len, unsigned char *data, void *xtra);
-void syncReadFromPPP(PPPoEConnection *conn, PPPoEPacket *packet);
-void asyncReadFromPPP(PPPoEConnection *conn, PPPoEPacket *packet);
-void asyncReadFromEth(PPPoEConnection *conn, int sock, int clampMss);
-void syncReadFromEth(PPPoEConnection *conn, int sock, int clampMss);
-char *strDup(char const *str);
-void sendPADT(PPPoEConnection *conn, char const *msg);
-void sendSessionPacket(PPPoEConnection *conn,
- PPPoEPacket *packet, int len);
-void initPPP(void);
-void clampMSS(PPPoEPacket *packet, char const *dir, int clampMss);
-UINT16_t computeTCPChecksum(unsigned char *ipHdr, unsigned char *tcpHdr);
-UINT16_t pppFCS16(UINT16_t fcs, unsigned char *cp, int len);
-void discovery(PPPoEConnection *conn);
-unsigned char *findTag(PPPoEPacket *packet, UINT16_t tagType,
- PPPoETag *tag);
-
-void pppoe_printpkt(PPPoEPacket *packet,
- void (*printer)(void *, char *, ...), void *arg);
-void pppoe_log_packet(const char *prefix, PPPoEPacket *packet);
-
-static inline int parseHostUniq(const char *uniq, PPPoETag *tag)
-{
- unsigned i, len = strlen(uniq);
-
-#define hex(x) \
- (((x) <= '9') ? ((x) - '0') : \
- (((x) <= 'F') ? ((x) - 'A' + 10) : \
- ((x) - 'a' + 10)))
-
- if (!len || len % 2 || len / 2 > sizeof(tag->payload))
- return 0;
-
- for (i = 0; i < len; i += 2) {
- if (!isxdigit(uniq[i]) || !isxdigit(uniq[i+1]))
- return 0;
-
- tag->payload[i / 2] = (char)(hex(uniq[i]) << 4 | hex(uniq[i+1]));
- }
-
-#undef hex
-
- tag->type = htons(TAG_HOST_UNIQ);
- tag->length = htons(len / 2);
- return 1;
-}
-
-#define SET_STRING(var, val) do { if (var) free(var); var = strDup(val); } while(0);
-
-#define CHECK_ROOM(cursor, start, len) \
-do {\
- if (((cursor)-(start))+(len) > MAX_PPPOE_PAYLOAD) { \
- error("Would create too-long packet"); \
- return; \
- } \
-} while(0)
-
-/* True if Ethernet address is broadcast or multicast */
-#define NOT_UNICAST(e) ((e[0] & 0x01) != 0)
-#define BROADCAST(e) ((e[0] & e[1] & e[2] & e[3] & e[4] & e[5]) == 0xFF)
-#define NOT_BROADCAST(e) ((e[0] & e[1] & e[2] & e[3] & e[4] & e[5]) != 0xFF)
projects / ppp.git / blobdiff