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git://projects.qi-hardware.com/ben-wpan.git
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- perdump.h (struct result_ops), perdump.c (analyze, pcap_record): pass receive timestamp to reporter - per-text.c (t_line, flush, text_undecided, text_packet): print relative receive timestamp before each packet
157 lines
2.9 KiB
C
157 lines
2.9 KiB
C
/*
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* atrf-txrx/perdump.c - Analyze and dump a recorded PER test
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "pcap.h"
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#include "perdump.h"
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#define MAX_PSDU 127
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static const struct result_ops *ops;
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static void analyze(uint8_t *buf, int len, double ts)
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{
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static int last = -1;
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static double t0 = 0;
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int freq[256];
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uint8_t best = 0;
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int i;
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if (!t0)
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t0 = ts;
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for (i = 0; i != 256; i++)
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freq[i] = 0;
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for (i = 0; i != len; i++) {
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freq[buf[i]]++;
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if (!i || freq[buf[i]] > freq[best])
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best = buf[i];
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}
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if (freq[best] <= len >> 1 && freq[best] != len) {
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ops->undecided(len*2, ts-t0);
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if (last != -1)
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last++; /* probably :-) */
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return;
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}
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ops->packet(len*2, last == -1 ? 0 : (uint8_t) (best-last-1), ts-t0);
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last = best;
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for (i = 0; i != len; i++) {
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uint8_t delta = buf[i] ^ best;
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if (delta & 0x0f)
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ops->error(i*2);
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if (delta & 0xf0)
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ops->error(i*2+1);
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}
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}
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static int pcap_record(FILE *file, const char *name)
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{
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struct pcap_pkthdr hdr;
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uint8_t buf[MAX_PSDU];
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size_t got;
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got = fread(&hdr, sizeof(hdr), 1, file);
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if (!got) {
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if (ferror(file)) {
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perror(name);
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exit(1);
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}
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return 0;
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}
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if (hdr.caplen > MAX_PSDU) {
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fprintf(stderr, "packet too big %u > %u\n",
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hdr.caplen, MAX_PSDU);
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exit(1);
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}
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got = fread(buf, hdr.caplen, 1, file);
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if (!got) {
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if (ferror(file)) {
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perror(name);
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exit(1);
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}
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fprintf(stderr, "file truncated\n");
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exit(1);
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}
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analyze(buf, hdr.caplen, hdr.ts_sec+hdr.ts_usec/1000000.0);
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return 1;
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}
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static void process_pcap(const char *name)
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{
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FILE *file;
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struct pcap_file_header hdr;
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size_t got;
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file = fopen(name, "r");
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if (!file) {
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perror(name);
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exit(1);
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}
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got = fread(&hdr, sizeof(hdr), 1, file);
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if (!got) {
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if (ferror(file)) {
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perror(name);
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exit(1);
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}
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return;
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return;
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}
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if (hdr.magic != PCAP_FILE_MAGIC) {
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fprintf(stderr, "unrecognized magic number 0x%08x "
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"(expected 0x%08x)\n", hdr.magic, PCAP_FILE_MAGIC);
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exit(1);
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}
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if (hdr.version_major != 2) {
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fprintf(stderr, "unrecognized major number %u (expected %u)\n",
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hdr.version_major, 2);
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exit(1);
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}
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if (hdr.linktype != DLT_IEEE802_15_4) {
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fprintf(stderr, "unrecognized link type 0x%x "
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"(expected 0x%0x)\n", hdr.linktype, DLT_IEEE802_15_4);
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exit(1);
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}
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if (ops->begin)
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ops->begin();
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while (pcap_record(file, name));
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if (ops->finish)
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ops->finish();
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fclose(file);
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}
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static void usage(const char *name)
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{
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fprintf(stderr, "usage: %s pcap-file\n", name);
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exit(1);
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}
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int main(int argc, char **argv)
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{
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if (argc != 2)
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usage(*argv);
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ops = &text_ops;
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process_pcap(argv[1]);
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return 0;
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}
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