hdlctest.c

   1 /*
   2  * Written by Mark Spencer <markster@digium.com>
   3  * Based on previous works, designs, and architectures conceived and
   4  * written by Jim Dixon <jim@lambdatel.com>.
   5  *
   6  * Copyright (C) 2001 Jim Dixon / Zapata Telephony.
   7  * Copyright (C) 2001-2008 Digium, Inc.
   8  *
   9  * All rights reserved.
  10  *
  11  * Primary Author: Mark Spencer <markster@digium.com>
  12  * Radio Support by Jim Dixon <jim@lambdatel.com>
  13  */
  14
  15 /*
  16  * See http://www.asterisk.org for more information about
  17  * the Asterisk project. Please do not directly contact
  18  * any of the maintainers of this project for assistance;
  19  * the project provides a web site, mailing lists and IRC
  20  * channels for your use.
  21  *
  22  * This program is free software, distributed under the terms of
  23  * the GNU General Public License Version 2 as published by the
  24  * Free Software Foundation. See the LICENSE file included with
  25  * this program for more details.
  26  */
  27
  28 #include <stdio.h>
  29 #include <fcntl.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33 #include <linux/types.h>
  34 #include <linux/ppp_defs.h>
  35 #include <sys/ioctl.h>
  36 #include <unistd.h>
  37 #include <stdlib.h>
  38 #include <dahdi/user.h>
  39
  40 #define FAST_HDLC_NEED_TABLES
  41 #include <dahdi/fasthdlc.h>
  42
  43 #include "bittest.h"
  44
  45 #include "dahdi_tools_version.h"
  46
  47 #define BLOCK_SIZE 2039
  48
  49 static unsigned short fcstab[256] =
  50 {
  51         0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
  52         0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
  53         0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
  54         0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
  55         0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
  56         0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
  57         0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
  58         0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
  59         0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
  60         0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
  61         0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
  62         0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
  63         0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
  64         0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
  65         0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
  66         0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
  67         0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
  68         0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
  69         0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
  70         0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
  71         0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
  72         0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
  73         0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
  74         0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
  75         0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
  76         0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
  77         0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
  78         0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
  79         0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
  80         0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
  81         0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
  82         0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
  83 };
  84
  85 #define PPP_INITFCS     0xffff  /* Initial FCS value */
  86 #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
  87 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
  88
  89 void print_packet(unsigned char *buf, int len)
  90 {
  91         int x;
  92         printf("{ ");
  93         for (x = 0; x < len; x++) {
  94                 printf("%02x ", buf[x]);
  95         }
  96         printf("}\n");
  97 }
  98
  99 static int bytes;
 100 static int errors;
 101 static int c;
 102
 103 void dump_bits(unsigned char *outbuf, int len)
 104 {
 105         int x, i;
 106         for (x = 0; x < len; x++) {
 107                 for (i = 0; i < 8; i++) {
 108                         if (outbuf[x] & (1 << (7 - i))) {
 109                                 printf("1");
 110                         } else {
 111                                 printf("0");
 112                         }
 113                 }
 114         }
 115         printf("\n");
 116 }
 117
 118 void dump_bitslong(unsigned int outbuf, int bits)
 119 {
 120         int i;
 121         printf("Dumping %d bits from %04x\n", bits, outbuf);
 122         for (i = 0; i < bits; i++) {
 123                 if (outbuf & (1 << (31 - i))) {
 124                         printf("1");
 125                 } else {
 126                         printf("0");
 127                 }
 128         }
 129         printf("\n");
 130 }
 131
 132 int check_frame(unsigned char *outbuf, int res)
 133 {
 134         static int setup = 0;
 135         int x;
 136         unsigned short fcs = PPP_INITFCS;
 137         if (c < 1) {
 138                 c = 1;
 139         }
 140         if (!setup) {
 141                 c = outbuf[0];
 142                 setup++;
 143         }
 144         for (x = 0; x < res; x++) {
 145                 if (outbuf[x] != c && (x < res - 2)) {
 146                         printf("(Error %d): Unexpected result, %d != %d, position %d %d bytes since last error.\n",
 147                                    ++errors, outbuf[x], c, x, bytes);
 148                         if (!x) {
 149                                 c = outbuf[0];
 150                         }
 151                         bytes = 0;
 152                 } else {
 153                         bytes++;
 154                 }
 155                 fcs = PPP_FCS(fcs, outbuf[x]);
 156         }
 157         if (fcs != PPP_GOODFCS) {
 158                 printf("FCS Check failed :( (%04x != %04x)\n", fcs, PPP_GOODFCS);
 159         }
 160 #if 0
 161         if (res != c) {
 162                 printf("Res is %d, expected %d\n", res, c+2);
 163         }
 164 #endif
 165         c = bit_next(c);
 166         return 0;
 167 }
 168
 169 int main(int argc, char *argv[])
 170 {
 171         int fd;
 172         int res, x;
 173         struct dahdi_params tp;
 174         struct dahdi_bufferinfo bi;
 175         int bs = BLOCK_SIZE;
 176         int pos = 0;
 177         unsigned char inbuf[BLOCK_SIZE];
 178         unsigned char outbuf[BLOCK_SIZE];
 179         int bytes = 0;
 180         int out;
 181         unsigned int olddata1;
 182         int oldones1;
 183         int oldbits1;
 184         unsigned int olddata = 0;
 185         int oldones = 0;
 186         int oldbits = 0;
 187         int hdlcmode = 0;
 188         struct fasthdlc_state fs;
 189         if (argc < 2) {
 190                 fprintf(stderr, "Usage: %s <DAHDI device>\n", argv[0]);
 191                 exit(1);
 192         }
 193         fd = open(argv[1], O_RDWR, 0600);
 194         if (fd < 0) {
 195                 fprintf(stderr, "Unable to open %s: %s\n", argv[1], strerror(errno));
 196                 exit(1);
 197         }
 198         if (ioctl(fd, DAHDI_SET_BLOCKSIZE, &bs)) {
 199                 fprintf(stderr, "Unable to set block size to %d: %s\n", bs, strerror(errno));
 200                 exit(1);
 201         }
 202         if (ioctl(fd, DAHDI_GET_PARAMS, &tp)) {
 203                 fprintf(stderr, "Unable to get channel parameters\n");
 204                 exit(1);
 205         }
 206         if ((tp.sigtype & DAHDI_SIG_HDLCRAW) == DAHDI_SIG_HDLCRAW) {
 207                 printf("In HDLC mode\n");
 208                 hdlcmode = 1;
 209         } else if ((tp.sigtype & DAHDI_SIG_CLEAR) == DAHDI_SIG_CLEAR) {
 210                 printf("In CLEAR mode\n");
 211                 hdlcmode = 0;
 212         } else {
 213                 fprintf(stderr, "Not in a reasonable mode\n");
 214                 exit(1);
 215         }
 216         res = ioctl(fd, DAHDI_GET_BUFINFO, &bi);
 217         if (!res) {
 218                 bi.txbufpolicy = DAHDI_POLICY_IMMEDIATE;
 219                 bi.rxbufpolicy = DAHDI_POLICY_IMMEDIATE;
 220                 bi.numbufs = 4;
 221                 res = ioctl(fd, DAHDI_SET_BUFINFO, &bi);
 222                 if (res < 0) {
 223                         fprintf(stderr, "Unable to set buf info: %s\n", strerror(errno));
 224                         exit(1);
 225                 }
 226         } else {
 227                 fprintf(stderr, "Unable to get buf info: %s\n", strerror(errno));
 228                 exit(1);
 229         }
 230         ioctl(fd, DAHDI_GETEVENT);
 231         fasthdlc_precalc();
 232         fasthdlc_init(&fs, FASTHDLC_MODE_64);
 233         for (;;) {
 234                 res = read(fd, outbuf, sizeof(outbuf));
 235                 if (hdlcmode) {
 236                         if (res < 0) {
 237                                 if (errno == ELAST) {
 238                                         if (ioctl(fd, DAHDI_GETEVENT, &x) < 0) {
 239                                                 fprintf(stderr, "Unaable to get event: %s\n", strerror(errno));
 240                                                 exit(1);
 241                                         }
 242                                         fprintf(stderr, "Event: %d (%d bytes since last error)\n", x, bytes);
 243                                         bytes = 0;
 244                                         continue;
 245                                 } else {
 246                                         fprintf(stderr, "Error: %s\n", strerror(errno));
 247                                         exit(1);
 248                                 }
 249                         }
 250 #if 0
 251                         printf("Res is %d, buf0 is %d, buf1 is %d\n", res, outbuf[0], outbuf[1]);
 252 #endif
 253                         if (res < 2) {
 254                                 fprintf(stderr, "Too small?  Only got %d bytes\n", res);
 255                         }
 256                         check_frame(outbuf, res);
 257                 } else {
 258                         for (x = 0; x < res; x++) {
 259                                 oldones1 = oldones;
 260                                 oldbits1 = oldbits;
 261                                 olddata1 = olddata;
 262                                 oldones = fs.ones;
 263                                 oldbits = fs.bits;
 264                                 olddata = fs.data;
 265                                 fasthdlc_rx_load(&fs, outbuf[x]);
 266                                 out = fasthdlc_rx_run(&fs);
 267                                 if (out & RETURN_EMPTY_FLAG) {
 268                                         /* Empty */
 269                                 } else if (out & RETURN_COMPLETE_FLAG) {
 270                                         if (pos && (pos < 2)) {
 271                                                 printf("Too short? (%d)\n", pos);
 272                                         } else if (pos) {
 273                                                 check_frame(inbuf, pos);
 274                                         }
 275                                         pos = 0;
 276                                 } else if (out & RETURN_DISCARD_FLAG) {
 277                                         printf("Discard (search = %d, len = %d, buf = %d, x=%d, res=%d, oldones: %d, oldbits: %d)\n",
 278                                                    c, pos, inbuf[0], x, res, oldones, oldbits);
 279                                         dump_bitslong(olddata, oldbits);
 280                                         printf("Discard                                                 oldones: %d, oldbits: %d)\n",
 281                                                    oldones1, oldbits1);
 282                                         dump_bitslong(olddata1, oldbits1);
 283                                         if (x > 64) {
 284                                                 dump_bits(outbuf + x - 64, 64);
 285                                                 dump_bits(outbuf + x, 64);
 286                                         }
 287                                         pos = 0;
 288                                 } else {
 289                                         if ((out != c) && (pos < c) && !pos) {
 290                                                 printf("Warning: Expecting %d at pos %d, got %d (x =%d)\n", c, pos, out, x);
 291                                                 if (x > 64) {
 292                                                         dump_bits(outbuf + x - 64, 64);
 293                                                         dump_bits(outbuf + x, 64);
 294                                                 }
 295                                         }
 296                                         inbuf[pos++] = out;
 297                                 }
 298                         }
 299                 }
 300         }
 301
 302 }