diff options
Diffstat (limited to 'mdk-stage1/rp-pppoe/src/ppp.c')
| -rw-r--r-- | mdk-stage1/rp-pppoe/src/ppp.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/mdk-stage1/rp-pppoe/src/ppp.c b/mdk-stage1/rp-pppoe/src/ppp.c deleted file mode 100644 index 72020a76c..000000000 --- a/mdk-stage1/rp-pppoe/src/ppp.c +++ /dev/null @@ -1,258 +0,0 @@ -/*********************************************************************** -* -* ppp.c -* -* Implementation of user-space PPPoE redirector for Linux. -* -* Functions for talking to PPP daemon -* -* Copyright (C) 2000 by 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. -* -***********************************************************************/ - -static char const RCSID[] = -"$Id$"; - -#include "pppoe.h" - -#ifdef HAVE_SYSLOG_H -#include <syslog.h> -#endif - -#include <string.h> -#include <errno.h> -#include <stdlib.h> - -#ifdef HAVE_SYS_UIO_H -#include <sys/uio.h> -#endif - -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifdef HAVE_N_HDLC -#ifndef N_HDLC -#include <linux/termios.h> -#endif -#endif - -int PPPState; -int PPPPacketSize; -unsigned char PPPXorValue; - -UINT16_t fcstab[256] = { - 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, - 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, - 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, - 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, - 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, - 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, - 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, - 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, - 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, - 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, - 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, - 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, - 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, - 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, - 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, - 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, - 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, - 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, - 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, - 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, - 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, - 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, - 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, - 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, - 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, - 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, - 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, - 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, - 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, - 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, - 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, - 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 -}; - -/********************************************************************** -*%FUNCTION: syncReadFromPPP -*%ARGUMENTS: -* conn -- PPPoEConnection structure -* packet -- buffer in which to place PPPoE packet -*%RETURNS: -* Nothing -*%DESCRIPTION: -* Reads from a synchronous PPP device and builds and transmits a PPPoE -* packet -***********************************************************************/ -void -syncReadFromPPP(PPPoEConnection *conn, PPPoEPacket *packet) -{ - int r; -#ifndef HAVE_N_HDLC - struct iovec vec[2]; - unsigned char dummy[2]; - vec[0].iov_base = (void *) dummy; - vec[0].iov_len = 2; - vec[1].iov_base = (void *) packet->payload; - vec[1].iov_len = ETH_DATA_LEN - PPPOE_OVERHEAD; - - /* Use scatter-read to throw away the PPP frame address bytes */ - r = readv(0, vec, 2); -#else - /* Bloody hell... readv doesn't work with N_HDLC line discipline... GRR! */ - unsigned char buf[ETH_DATA_LEN - PPPOE_OVERHEAD + 2]; - r = read(0, buf, ETH_DATA_LEN - PPPOE_OVERHEAD + 2); - if (r >= 2) { - memcpy(packet->payload, buf+2, r-2); - } -#endif - if (r < 0) { - /* Catch the Linux "select" bug */ - if (errno == EAGAIN) { - rp_fatal("Linux select bug hit! This message is harmless, but please ask the Linux kernel developers to fix it."); - } - fatalSys("read (syncReadFromPPP)"); - } - if (r == 0) { - syslog(LOG_INFO, "end-of-file in syncReadFromPPP"); - sendPADT(conn, "RP-PPPoE: EOF in syncReadFromPPP"); - exit(0); - } - - if (r < 2) { - rp_fatal("too few characters read from PPP (syncReadFromPPP)"); - } - - sendSessionPacket(conn, packet, r-2); -} - -/********************************************************************** -*%FUNCTION: initPPP -*%ARGUMENTS: -* None -*%RETURNS: -* Nothing -*%DESCRIPTION: -* Initializes the PPP state machine -***********************************************************************/ -void -initPPP(void) -{ - PPPState = STATE_WAITFOR_FRAME_ADDR; - PPPPacketSize = 0; - PPPXorValue = 0; - -} -/********************************************************************** -*%FUNCTION: asyncReadFromPPP -*%ARGUMENTS: -* conn -- PPPoEConnection structure -* packet -- buffer in which to place PPPoE packet -*%RETURNS: -* Nothing -*%DESCRIPTION: -* Reads from an async PPP device and builds a PPPoE packet to transmit -***********************************************************************/ -void -asyncReadFromPPP(PPPoEConnection *conn, PPPoEPacket *packet) -{ - unsigned char buf[READ_CHUNK]; - unsigned char *ptr = buf; - unsigned char c; - - int r; - - r = read(0, buf, READ_CHUNK); - if (r < 0) { - fatalSys("read (asyncReadFromPPP)"); - } - - if (r == 0) { - syslog(LOG_INFO, "end-of-file in asyncReadFromPPP"); - sendPADT(conn, "RP-PPPoE: EOF in asyncReadFromPPP"); - exit(0); - } - - while(r) { - if (PPPState == STATE_WAITFOR_FRAME_ADDR) { - while(r) { - --r; - if (*ptr++ == FRAME_ADDR) { - PPPState = STATE_DROP_PROTO; - break; - } - } - } - - /* Still waiting... */ - if (PPPState == STATE_WAITFOR_FRAME_ADDR) return; - - while(r && PPPState == STATE_DROP_PROTO) { - --r; - if (*ptr++ == (FRAME_CTRL ^ FRAME_ENC)) { - PPPState = STATE_BUILDING_PACKET; - } - } - - if (PPPState == STATE_DROP_PROTO) return; - - /* Start building frame */ - while(r && PPPState == STATE_BUILDING_PACKET) { - --r; - c = *ptr++; - switch(c) { - case FRAME_ESC: - PPPXorValue = FRAME_ENC; - break; - case FRAME_FLAG: - if (PPPPacketSize < 2) { - rp_fatal("Packet too short from PPP (asyncReadFromPPP)"); - } - sendSessionPacket(conn, packet, PPPPacketSize-2); - PPPPacketSize = 0; - PPPXorValue = 0; - PPPState = STATE_WAITFOR_FRAME_ADDR; - break; - default: - if (PPPPacketSize >= ETH_DATA_LEN - 4) { - syslog(LOG_ERR, "Packet too big! Check MTU on PPP interface"); - PPPPacketSize = 0; - PPPXorValue = 0; - PPPState = STATE_WAITFOR_FRAME_ADDR; - } else { - packet->payload[PPPPacketSize++] = c ^ PPPXorValue; - PPPXorValue = 0; - } - } - } - } -} - -/********************************************************************** -*%FUNCTION: pppFCS16 -*%ARGUMENTS: -* fcs -- current fcs -* cp -- a buffer's worth of data -* len -- length of buffer "cp" -*%RETURNS: -* A new FCS -*%DESCRIPTION: -* Updates the PPP FCS. -***********************************************************************/ -UINT16_t -pppFCS16(UINT16_t fcs, - unsigned char * cp, - int len) -{ - while (len--) - fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff]; - - return (fcs); -} - |