/* * Written by Mark Spencer * Based on previous works, designs, and architectures conceived and * written by Jim Dixon . * * Copyright (C) 2001 Jim Dixon / Zapata Telephony. * Copyright (C) 2001-2008 Digium, Inc. * * All rights reserved. * * Primary Author: Mark Spencer * Radio Support by Jim Dixon */ /* * See http://www.asterisk.org for more information about * the Asterisk project. Please do not directly contact * any of the maintainers of this project for assistance; * the project provides a web site, mailing lists and IRC * channels for your use. * * This program is free software, distributed under the terms of * the GNU General Public License Version 2 as published by the * Free Software Foundation. See the LICENSE file included with * this program for more details. */ #include #include #include #include #include #include #include #include #include #include #include #define FAST_HDLC_NEED_TABLES #include #include "bittest.h" #include "dahdi_tools_version.h" #define BLOCK_SIZE 2039 static unsigned short 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 }; #define PPP_INITFCS 0xffff /* Initial FCS value */ #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) void print_packet(unsigned char *buf, int len) { int x; printf("{ "); for (x = 0; x < len; x++) { printf("%02x ", buf[x]); } printf("}\n"); } static int bytes; static int errors; static int c; void dump_bits(unsigned char *outbuf, int len) { int x, i; for (x = 0; x < len; x++) { for (i = 0; i < 8; i++) { if (outbuf[x] & (1 << (7 - i))) { printf("1"); } else { printf("0"); } } } printf("\n"); } void dump_bitslong(unsigned int outbuf, int bits) { int i; printf("Dumping %d bits from %04x\n", bits, outbuf); for (i = 0; i < bits; i++) { if (outbuf & (1 << (31 - i))) { printf("1"); } else { printf("0"); } } printf("\n"); } int check_frame(unsigned char *outbuf, int res) { static int setup = 0; int x; unsigned short fcs = PPP_INITFCS; if (c < 1) { c = 1; } if (!setup) { c = outbuf[0]; setup++; } for (x = 0; x < res; x++) { if (outbuf[x] != c && (x < res - 2)) { printf("(Error %d): Unexpected result, %d != %d, position %d %d bytes since last error.\n", ++errors, outbuf[x], c, x, bytes); if (!x) { c = outbuf[0]; } bytes = 0; } else { bytes++; } fcs = PPP_FCS(fcs, outbuf[x]); } if (fcs != PPP_GOODFCS) { printf("FCS Check failed :( (%04x != %04x)\n", fcs, PPP_GOODFCS); } #if 0 if (res != c) { printf("Res is %d, expected %d\n", res, c+2); } #endif c = bit_next(c); return 0; } int main(int argc, char *argv[]) { int fd; int res, x; struct dahdi_params tp; struct dahdi_bufferinfo bi; int bs = BLOCK_SIZE; int pos = 0; unsigned char inbuf[BLOCK_SIZE]; unsigned char outbuf[BLOCK_SIZE]; int bytes = 0; int out; unsigned int olddata1; int oldones1; int oldbits1; unsigned int olddata = 0; int oldones = 0; int oldbits = 0; int hdlcmode = 0; struct fasthdlc_state fs; if (argc < 2) { fprintf(stderr, "Usage: %s \n", argv[0]); exit(1); } fd = open(argv[1], O_RDWR, 0600); if (fd < 0) { fprintf(stderr, "Unable to open %s: %s\n", argv[1], strerror(errno)); exit(1); } if (ioctl(fd, DAHDI_SET_BLOCKSIZE, &bs)) { fprintf(stderr, "Unable to set block size to %d: %s\n", bs, strerror(errno)); exit(1); } if (ioctl(fd, DAHDI_GET_PARAMS, &tp)) { fprintf(stderr, "Unable to get channel parameters\n"); exit(1); } if ((tp.sigtype & DAHDI_SIG_HDLCRAW) == DAHDI_SIG_HDLCRAW) { printf("In HDLC mode\n"); hdlcmode = 1; } else if ((tp.sigtype & DAHDI_SIG_CLEAR) == DAHDI_SIG_CLEAR) { printf("In CLEAR mode\n"); hdlcmode = 0; } else { fprintf(stderr, "Not in a reasonable mode\n"); exit(1); } res = ioctl(fd, DAHDI_GET_BUFINFO, &bi); if (!res) { bi.txbufpolicy = DAHDI_POLICY_IMMEDIATE; bi.rxbufpolicy = DAHDI_POLICY_IMMEDIATE; bi.numbufs = 4; res = ioctl(fd, DAHDI_SET_BUFINFO, &bi); if (res < 0) { fprintf(stderr, "Unable to set buf info: %s\n", strerror(errno)); exit(1); } } else { fprintf(stderr, "Unable to get buf info: %s\n", strerror(errno)); exit(1); } ioctl(fd, DAHDI_GETEVENT); fasthdlc_precalc(); fasthdlc_init(&fs, FASTHDLC_MODE_64); for (;;) { res = read(fd, outbuf, sizeof(outbuf)); if (hdlcmode) { if (res < 0) { if (errno == ELAST) { if (ioctl(fd, DAHDI_GETEVENT, &x) < 0) { fprintf(stderr, "Unaable to get event: %s\n", strerror(errno)); exit(1); } fprintf(stderr, "Event: %d (%d bytes since last error)\n", x, bytes); bytes = 0; continue; } else { fprintf(stderr, "Error: %s\n", strerror(errno)); exit(1); } } #if 0 printf("Res is %d, buf0 is %d, buf1 is %d\n", res, outbuf[0], outbuf[1]); #endif if (res < 2) { fprintf(stderr, "Too small? Only got %d bytes\n", res); } check_frame(outbuf, res); } else { for (x = 0; x < res; x++) { oldones1 = oldones; oldbits1 = oldbits; olddata1 = olddata; oldones = fs.ones; oldbits = fs.bits; olddata = fs.data; fasthdlc_rx_load(&fs, outbuf[x]); out = fasthdlc_rx_run(&fs); if (out & RETURN_EMPTY_FLAG) { /* Empty */ } else if (out & RETURN_COMPLETE_FLAG) { if (pos && (pos < 2)) { printf("Too short? (%d)\n", pos); } else if (pos) { check_frame(inbuf, pos); } pos = 0; } else if (out & RETURN_DISCARD_FLAG) { printf("Discard (search = %d, len = %d, buf = %d, x=%d, res=%d, oldones: %d, oldbits: %d)\n", c, pos, inbuf[0], x, res, oldones, oldbits); dump_bitslong(olddata, oldbits); printf("Discard oldones: %d, oldbits: %d)\n", oldones1, oldbits1); dump_bitslong(olddata1, oldbits1); if (x > 64) { dump_bits(outbuf + x - 64, 64); dump_bits(outbuf + x, 64); } pos = 0; } else { if ((out != c) && (pos < c) && !pos) { printf("Warning: Expecting %d at pos %d, got %d (x =%d)\n", c, pos, out, x); if (x > 64) { dump_bits(outbuf + x - 64, 64); dump_bits(outbuf + x, 64); } } inbuf[pos++] = out; } } } } }