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/* Small program to read an input file / stdin and send each line via GSMTAP logging */
/* (C) 2023 by Harald Welte <laforge@osmocom.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <errno.h>
#include <sys/uio.h>
#include <getopt.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/gsmtap.h>
#include <osmocom/core/gsmtap_util.h>
static char *proc_name = "gsmtap-logsend";
static char *subsys_name = "unknown";
static char *dest_host = "localhost";
static int dest_port = GSMTAP_UDP_PORT;
static void help(void)
{
printf("osmo-gsmtap-logsend Usage:\n"
"\t[ -r DESTADDR ] [ -p PORTNR ] [ -n PROC_NAME ] [ -s SUBSYS ] [ INFILE ]\n"
"\n"
" -a --remote-address HOSTNAME Destination IP destination address (default: localhost)\n"
" -p --remote-port PORTNR Destination UDP Port number (default: 4729)\n"
" -n --process-name PROC_NAME Process name to include in GSMTAP LOG header\n"
" -s --subsys-name SUBSYS Subsystem name to include in GSMTAP LOG header\n"
" -h --help This help message\n"
);
}
int main(int argc, char **argv)
{
char buf[1024];
int gsmtap_fd;
FILE *infile;
char *line;
int rc;
while (1) {
static const struct option long_options[] = {
{ "remote-address", 1, 0, 'a' },
{ "remote-port", 1, 0, 'p' },
{ "process-name", 1, 0, 'n' },
{ "subsys-name", 1, 0, 's' },
{ "help", 0, 0, 'h' },
{ 0, 0, 0, 0 }
};
int c, option_index;
c = getopt_long(argc, argv, "a:p:n:s:h", long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'a':
dest_host = optarg;
break;
case 'p':
dest_port = atoi(optarg);
break;
case 'n':
proc_name = optarg;
break;
case 's':
subsys_name = optarg;
break;
case 'h':
help();
exit(0);
break;
default:
help();
exit(1);
}
}
if (argc <= optind) {
infile = stdin;
} else {
infile = fopen(argv[optind], "r");
if (!infile) {
fprintf(stderr, "Unable to open %s: %s\n", argv[optind], strerror(errno));
exit(2);
}
}
gsmtap_fd = gsmtap_source_init_fd(dest_host, dest_port);
if (gsmtap_fd < 0) {
fprintf(stderr, "Unable to create GSMTAP soicket: %s\n", strerror(errno));
exit(2);
}
/* prepare all the data structures that don't change for each line */
struct {
struct gsmtap_hdr gsmtap;
struct gsmtap_osmocore_log_hdr log;
} __attribute__ ((packed)) hdr;
struct timeval tv;
memset(&hdr, 0, sizeof(hdr));
hdr.gsmtap.version = GSMTAP_VERSION;
hdr.gsmtap.hdr_len = sizeof(hdr.gsmtap)/4;
hdr.gsmtap.type = GSMTAP_TYPE_OSMOCORE_LOG;
OSMO_STRLCPY_ARRAY(hdr.log.proc_name, proc_name);
OSMO_STRLCPY_ARRAY(hdr.log.subsys, subsys_name);
hdr.log.level = LOGL_INFO;
while ((line = fgets(buf, sizeof(buf), infile))) {
struct iovec iov[2] = {
{ .iov_base = &hdr, .iov_len = sizeof(hdr) },
{ .iov_base = buf, .iov_len = strlen(line) + 1 },
};
osmo_gettimeofday(&tv, NULL);
hdr.log.ts.sec = osmo_htonl(tv.tv_sec);
hdr.log.ts.usec = osmo_htonl(tv.tv_usec);
rc = writev(gsmtap_fd, iov, ARRAY_SIZE(iov));
if (rc <= 0) {
fprintf(stderr, "Short write on GSMTAP socket: %d (%s)\n", rc, strerror(errno));
exit(1);
}
}
}
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