218 lines
4.6 KiB
C
218 lines
4.6 KiB
C
#include <stdio.h>
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#include <time.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/time.h>
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#include <osmocom/core/signal.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/application.h>
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#include <osmocom/abis/subchan_demux.h>
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#include "storage.h"
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#include "recorder.h"
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struct e1_recorder g_recorder;
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enum mode {
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MODE_PRINT,
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MODE_BIN,
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MODE_SC,
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};
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#define MAX_TS 32
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#define CHUNK_BYTES 160
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/* Ericsson super-channel */
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struct sc_state {
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uint8_t ts_data[MAX_TS][CHUNK_BYTES];
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uint8_t num_ts;
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};
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static struct sc_state g_sc_state[2];
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static enum mode g_mode = MODE_PRINT;
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static int g_filter_line = -1;
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static int g_filter_slot = -1;
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static int g_filter_subslot = -1;
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static struct osmo_e1cap_pkthdr *g_last_pkthdr;
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static char *timeval2str(struct timeval *tv)
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{
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time_t nowtime;
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struct tm *nowtm;
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char tmbuf[64];
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static char buf[64];
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nowtime = tv->tv_sec;
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nowtm = localtime(&nowtime);
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strftime(tmbuf, sizeof tmbuf, "%Y-%m-%d %H:%M:%S", nowtm);
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snprintf(buf, sizeof buf, "%s.%06ld", tmbuf, tv->tv_usec);
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return buf;
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}
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static int all_bytes_are(unsigned char ch, const uint8_t *data, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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if (data[i] != ch)
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return 0;
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}
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return 1;
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}
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static void handle_sc_out(struct sc_state *scs)
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{
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uint8_t out[scs->num_ts * CHUNK_BYTES];
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int i, j, k = 0;
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/* re-shuffle the data from columns to lines */
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for (i = 0; i < CHUNK_BYTES; i++) {
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for (j = 1; j < scs->num_ts; j++)
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out[k++] = scs->ts_data[j][i];
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}
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printf("%s\n", osmo_hexdump_nospc(out, scs->num_ts * CHUNK_BYTES));
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}
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static void handle_sc_in(struct osmo_e1cap_pkthdr *pkt, const uint8_t *data, unsigned int len)
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{
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struct sc_state *scs;
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if (pkt->line_nr >= ARRAY_SIZE(g_sc_state)) {
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fprintf(stderr, "Line number out of range\n");
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exit(1);
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}
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scs = &g_sc_state[pkt->line_nr];
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if (pkt->ts_nr >= ARRAY_SIZE(scs->ts_data)) {
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fprintf(stderr, "Timeslot number out of range\n");
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exit(1);
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}
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if (len != sizeof(scs->ts_data[pkt->ts_nr])) {
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fprintf(stderr, "Insufficient data\n");
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exit(1);
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}
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memcpy(scs->ts_data[pkt->ts_nr], data, len);
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if (pkt->ts_nr-1 > scs->num_ts)
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scs->num_ts = pkt->ts_nr-1;
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if (pkt->ts_nr == scs->num_ts)
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handle_sc_out(scs);
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}
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static void handle_data(struct osmo_e1cap_pkthdr *pkt, const uint8_t *data, int len)
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{
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switch (g_mode) {
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case MODE_PRINT:
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printf("%s %02u/%02u %u (%u): %s\n",
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timeval2str(&pkt->ts),
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pkt->line_nr, pkt->ts_nr, pkt->capture_mode,
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pkt->len,
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osmo_hexdump_nospc(data, len));
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break;
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case MODE_BIN:
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write(1, data, len);
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break;
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case MODE_SC:
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handle_sc_in(pkt, data, len);
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break;
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}
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}
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static int subch_demux_out_cb(struct subch_demux *dmx, int ch, uint8_t *data,
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int len, void *c)
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{
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OSMO_ASSERT(ch == g_filter_subslot);
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handle_data(g_last_pkthdr, data, len);
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return 0;
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}
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static int handle_options(int argc, char **argv)
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{
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int opt;
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while ((opt = getopt(argc, argv, "l:s:bSu:")) != -1) {
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switch (opt) {
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case 'l': /* Filter on E1 Line Number */
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g_filter_line = atoi(optarg);
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break;
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case 's': /* Filter on E1 Slot Number */
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g_filter_slot = atoi(optarg);
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break;
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case 'b': /* Raw binary output mode (for piping) */
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g_mode = MODE_BIN;
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break;
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case 'S': /* Super Channel Mode */
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g_mode = MODE_SC;
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break;
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case 'u': /* 16k Sub-channel demux + filter */
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g_filter_subslot = atoi(optarg);
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if (g_filter_subslot < 0 || g_filter_subslot > 3)
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exit(2);
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break;
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default:
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fprintf(stderr, "Unknown option '%c'\n", opt);
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exit(EXIT_FAILURE);
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break;
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}
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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struct osmo_e1cap_file *f;
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struct osmo_e1cap_pkthdr *pkt;
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unsigned long num_pkt = 0;
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struct subch_demux smux;
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printf("sizeof(timeval) = %zu\n", sizeof(struct timeval));
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printf("sizeof(osmo_e1cap_pkthdr) = %zu\n", sizeof(*pkt));
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handle_options(argc, argv);
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if (optind >= argc) {
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fprintf(stderr, "Missing input file name\n");
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exit(2);
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}
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f = osmo_e1cap_open(NULL, argv[optind++]);
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if (!f) {
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fprintf(stderr, "Unable to open input file\n");
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exit(1);
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}
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if (g_filter_subslot >= 0) {
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smux.out_cb = subch_demux_out_cb;
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subch_demux_init(&smux);
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subch_demux_activate(&smux, g_filter_subslot);
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}
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while ((pkt = osmo_e1cap_read_next(f))) {
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num_pkt++;
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g_last_pkthdr = pkt;
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if (g_filter_line >= 0 && pkt->line_nr != g_filter_line)
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continue;
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if (g_filter_slot >= 0 && pkt->ts_nr != g_filter_slot)
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continue;
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if (g_filter_subslot >= 0) {
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subch_demux_in(&smux, pkt->data, pkt->len);
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continue;
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}
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handle_data(pkt, pkt->data, pkt->len);
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talloc_free(pkt);
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}
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fprintf(stderr, "Processed a total of %lu packets\n", num_pkt);
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}
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