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