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Sourcecode: zaptel version File versions

hdlcverify.c

#define FAST_HDLC_NEED_TABLES
#include "fasthdlc.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>

int myread(int fd, char *buf, int len)
{
      int sofar;
      int res;
      sofar = 0;
      while(sofar < len) {
            res = read(fd, buf + sofar, len - sofar);
            if (res < 0)
                  return res;
            sofar += res;
      }
      return sofar;
}

static inline unsigned char nextchar(int fd)
{
      static unsigned char inbuf[2048];
      static int bytes = 0;
      static int pos = 0;
      if (pos >= bytes) {
            pos = 0;
            bytes = read(fd, inbuf, sizeof(inbuf));
            if (bytes < 0) {
                  fprintf(stderr, "Unable to read more data: %s\n", strerror(errno));
                  exit(1);
            }
            if (bytes == 0) {
                  fprintf(stderr, "-- END OF DATA --\n");
                  exit(0);
            }
      }
      return inbuf[pos++];
}

int main(int argc, char *argv[])
{
      unsigned char decbuf[1024];
      unsigned char actual[1024];
      int res;
      int datain;
      int hdlcin;
      int hdlccnt;
      int x;
      struct fasthdlc_state receiver;
      
      fasthdlc_precalc();
      
      fasthdlc_init(&receiver);
      
      hdlcin = open("random.hdlc", O_RDONLY);
      if (hdlcin < 0) {
            fprintf(stderr, "Unable to open %s: %s\n", "random.hdlc", strerror(errno));
            exit(1);
      }
      datain = open("random.raw", O_RDONLY);
      if (datain < 0) {
            fprintf(stderr, "Unable to open random.raw: %s\n", strerror(errno));
            exit(1);
      }
      hdlccnt = 0;
      for (;;) {
            /* Feed in some input */
            if (fasthdlc_rx_load(&receiver, nextchar(hdlcin))) {
                  fprintf(stderr, "Unable to feed receiver :(\n");
                  exit(1);
            }
            res = fasthdlc_rx_run(&receiver);
            if (res & RETURN_EMPTY_FLAG)
                  continue;
            if (res & RETURN_COMPLETE_FLAG) {
                  if (hdlccnt) {
                        if (argc > 1)
                              printf("Got message of length %d\n", hdlccnt);
                        res = myread(datain, actual, hdlccnt);
                        if (res != hdlccnt) {
                              fprintf(stderr, "Tried to read %d bytes, but read %d instead\n", hdlccnt, res);
                              exit(1);
                        }
                        for (x=0;x<hdlccnt;x++) {
                              if (actual[x] != decbuf[x]) {
                                    fprintf(stderr, "Found discrepancy at offset %d\n", x);
                                    exit(1);
                              }
                        }
                        /* Reset message receiver */
                        hdlccnt = 0;
                  }
            } else if (res & RETURN_DISCARD_FLAG) {
                  if (1 || hdlccnt) {
                        fprintf(stderr, "Detected abort :(\n");
                        exit(1);
                  }
            } else {
                  decbuf[hdlccnt++] = res;
            }
      }
}

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