/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int arg_index;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* check for extraneous arguments */
if (arg_index != argc) {
skAppPrintErr("Too many arguments or unrecognized switch '%s'",
argv[arg_index]);
skAppUsage(); /* never returns */
}
/* verify logging */
if (sklogOptionsVerify()) {
exit(EXIT_FAILURE);
}
/* write command line */
sklogCommandLine(argc, argv);
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
return; /* OK */
}
int main(int argc, char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int arg_index;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL)
|| sksiteOptionsRegister(SK_SITE_FLAG_CONFIG_FILE))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* ensure the site config is available */
if (sksiteConfigure(1)) {
exit(EXIT_FAILURE);
}
/* if we are printing more than one sensor and a --print-* switch
* was given, set the width of the sensor name fields so the
* values align */
if ((argc != arg_index + 1) && (print_descriptions || print_classes)) {
sensor_name_width = -1 * (int)sksiteSensorGetMaxNameStrLen();
}
if (argc > arg_index) {
for ( ; arg_index < argc; ++arg_index) {
printByNameOrNumber(argv[arg_index]);
}
} else {
/* no args. print all */
printAllSensors();
}
skAppUnregister();
return 0;
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int arg_index;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
memset(&prefixmap_test_opt, 0, sizeof(prefixmap_test_opt));
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
if ( (NULL == prefixmap_test_opt.map_file) ||
(0 == prefixmap_test_opt.have_address) ) {
if ( NULL == prefixmap_test_opt.map_file ) {
skAppPrintErr("Required argument map-file not provided.");
}
if ( 0 == prefixmap_test_opt.have_address ) {
skAppPrintErr("Required argument address not provided.");
}
exit(EXIT_FAILURE);
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
/* verify same number of options and help strings */
assert((sizeof(appHelp) / sizeof(char *)) ==
(sizeof(appOptions) / sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, & appOptionsHandler, NULL)) {
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* register the teardown hanlder */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
skAppUsage(); /* never returns */
}
/* get the pattern */
pattern = argv[arg_index++];
if (NULL == pattern) {
skAppPrintErr("No pattern specified");
skAppUsage();
}
/* either need name of set file(s) after options or a set file on stdin */
if ((arg_index == argc) && (FILEIsATty(stdin))) {
skAppPrintErr("No files on the command line and"
" stdin is connected to a terminal");
skAppUsage();
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL)
|| sksiteOptionsRegister(SK_SITE_FLAG_CONFIG_FILE))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* try to load site config file; if it fails, we will not be able
* to resolve flowtype and sensor from input file names */
sksiteConfigure(0);
/* arg_index is looking at first file name to process */
if (arg_index + 2 != argc) {
skAppPrintErr("Expected two file names on the command line");
skAppUsage(); /* never returns */
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int arg_index;
int rv;
/* check that we have the same number of options entries and help*/
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* initialize globals */
shuttingdown = 0;
destination_dir = NULL;
duplicate_dirs = skDLListCreate(NULL);
if (duplicate_dirs == NULL) {
skAppPrintOutOfMemory("duplicate directory list");
exit(EXIT_FAILURE);
}
open_file_list = skDLListCreate(NULL);
if (open_file_list == NULL) {
skAppPrintOutOfMemory("open file list");
exit(EXIT_FAILURE);
}
transfers = transferIdentTreeCreate();
if (transfers == NULL) {
skAppPrintOutOfMemory("receiver data structure");
exit(EXIT_FAILURE);
}
#ifdef SK_HAVE_STATVFS
{
uint64_t tmp_64;
rv = skStringParseHumanUint64(&tmp_64, DEFAULT_FREESPACE_MINIMUM,
SK_HUMAN_NORMAL);
if (rv) {
skAppPrintErr("Bad default value for freespace_minimum: '%s': %s",
DEFAULT_FREESPACE_MINIMUM,skStringParseStrerror(rv));
exit(EXIT_FAILURE);
}
freespace_minimum = (int64_t)tmp_64;
}
#endif /* SK_HAVE_STATVFS */
/* register the options and handler */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register application options");
exit(EXIT_FAILURE);
}
/* Register the other transfer options */
if (transferSetup()) {
exit(EXIT_FAILURE);
}
/* rwreceiver runs as a daemon */
if (skdaemonSetup((SKLOG_FEATURE_LEGACY | SKLOG_FEATURE_SYSLOG),
argc, argv))
{
exit(EXIT_FAILURE);
}
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* Verify the options */
rv = rwreceiverVerifyOptions();
/* verify the required options for logging */
if (skdaemonOptionsVerify()) {
rv = -1;
}
if (rv) {
skAppUsage(); /* never returns */
}
/* check for extraneous arguments */
if (arg_index != argc) {
skAppPrintErr("Too many arguments or unrecognized switch --%s",
argv[arg_index]);
skAppUsage(); /* never returns */
}
/* Identify the main thread */
skthread_init("main");
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int rv;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* initialize globals */
#error "Initialize any global variables here"
/* for example: set global output to NULL */
out_stream = NULL;
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL)
|| sksiteOptionsRegister(SK_SITE_FLAG_CONFIG_FILE))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
#error "Do any other module setup here"
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* try to load site config file; if it fails, we will not be able
* to resolve flowtype and sensor from input file names */
sksiteConfigure(0);
#error "Do any options validation here"
#error "If you expect filenames on command line keep this:"
/* arg_index is looking at first file name to process */
if (arg_index == argc) {
if (FILEIsATty(stdin)) {
skAppPrintErr("No input files on command line and"
" stdin is connected to a terminal");
skAppUsage(); /* never returns */
}
}
#error "If you do NOT expect filenames on command line, keep this:"
/* check for extraneous arguments */
if (arg_index != argc) {
skAppPrintErr("Too many arguments or unrecognized switch '%s'",
argv[arg_index]);
skAppUsage(); /* never returns */
}
#error "Once all options are set, open input and output"
/* for example, open a SiLK flow file as an output file */
rv = skStreamOpenSilkFlow(&out_stream, output_path, SK_IO_WRITE);
if (rv) {
skStreamPrintLastErr(out_stream, rv, &skAppPrintErr);
skAppPrintErr("Unable to open output file. Exiting");
skStreamDestroy(&out_stream);
exit(EXIT_FAILURE);
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
const char *in_fname;
const char *out_fname;
int arg_index;
int rv;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* initialize globals */
memset(&set_options, 0, sizeof(skipset_options_t));
set_options.argc = argc;
set_options.argv = argv;
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL)
|| skIPSetOptionsRegister(&set_options))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
skAppUsage(); /* never returns */
}
/* default is to read from stdin and write to stdout */
in_fname = "-";
out_fname = "-";
/* process files named on the command line */
switch (argc - arg_index) {
case 2:
in_fname = argv[arg_index++];
out_fname = argv[arg_index++];
break;
case 1:
in_fname = argv[arg_index++];
break;
case 0:
/* Do not allow reading from a tty when no input */
if (FILEIsATty(stdin)) {
skAppPrintErr("Must specify '-' as the input to read"
" from a terminal");
exit(EXIT_FAILURE);
}
break;
default:
skAppPrintErr("Too many arguments;"
" a maximum of two files may be specified");
skAppUsage();
}
/* we should have processed all arguments */
assert(arg_index == argc);
/* create the IPset */
if (skIPSetCreate(&ipset, 0)) {
EXIT_NO_MEMORY;
}
skIPSetOptionsBind(ipset, &set_options);
/* create input */
if ((rv = skStreamCreate(&in_stream, SK_IO_READ, SK_CONTENT_TEXT))
|| (rv = skStreamBind(in_stream, in_fname))
|| (rv = skStreamSetCommentStart(in_stream, "#")))
{
skStreamPrintLastErr(in_stream, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
/* create output */
if ((rv = skStreamCreate(&out_stream, SK_IO_WRITE, SK_CONTENT_SILK))
|| (rv = skStreamBind(out_stream, out_fname)))
{
skStreamPrintLastErr(out_stream, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
/* open the streams */
rv = skStreamOpen(in_stream);
if (rv) {
skStreamPrintLastErr(in_stream, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
rv = skStreamOpen(out_stream);
if (rv) {
skStreamPrintLastErr(out_stream, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int arg_index;
int rv;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* register the teardown hanlder */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
/* options parsing should print error */
skAppUsage(); /* never returns */
}
/* check for extraneous arguments */
if (arg_index != argc) {
skAppPrintErr("Too many arguments or unrecognized switch '%s'",
argv[arg_index]);
skAppUsage(); /* never returns */
}
/* check for one and only one of --input-file and --address */
if (NULL != app_opt.input_file) {
if (NULL != app_opt.address) {
skAppPrintErr("Only one of --%s or --%s may be specified.",
appOptions[OPT_ADDRESS].name,
appOptions[OPT_INPUT_FILE].name);
skAppUsage();
}
} else if (NULL == app_opt.address) {
skAppPrintErr("Either the --%s or --%s option is required.",
appOptions[OPT_ADDRESS].name,
appOptions[OPT_INPUT_FILE].name);
skAppUsage();
}
/* find and load the map file */
if (skCountrySetup(app_opt.map_file, &skAppPrintErr)) {
exit(EXIT_FAILURE);
}
/* use default for print-ips if unset by user */
if (-1 == app_opt.print_ips) {
if (app_opt.input_file) {
app_opt.print_ips = 1;
} else {
app_opt.print_ips = 0;
}
}
/* create the output stream. Only page output when processing
* input file */
if ((rv = skStreamCreate(&out, SK_IO_WRITE, SK_CONTENT_TEXT))
|| (rv = skStreamBind(out, app_opt.output_path)))
{
skStreamPrintLastErr(out, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
if (app_opt.input_file) {
rv = skStreamPageOutput(out, app_opt.pager);
if (rv) {
skStreamPrintLastErr(out, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
}
rv = skStreamOpen(out);
if (rv) {
skStreamPrintLastErr(out, rv, &skAppPrintErr);
exit(EXIT_FAILURE);
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*
* NOTE: Make this extern due to declaration in rwfilter.h.
*/
void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
int rv;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char *)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* Set up the fglob module */
if (fglobSetup()){
skAppPrintErr("Unable to setup fglob module");
exit(EXIT_FAILURE);
}
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* Parse the options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
skAppUsage();
}
/* try to load site config file; if it fails, we will not be able
* to resolve flowtype and sensor from input file names */
sksiteConfigure(0);
/* check for extraneous arguments */
if (arg_index != argc) {
skAppPrintErr("Too many arguments or unrecognized switch '%s'",
argv[arg_index]);
skAppUsage();
}
/* verify that an fglob option was provided and that everything is
* ok with the setup. */
rv = fglobValid();
if (rv == -1) {
exit(EXIT_FAILURE);
}
if (rv == 0) {
skAppPrintErr("Must specify at least one file selection switch");
exit(EXIT_FAILURE);
}
return; /* OK */
}
/*
* appSetup(argc, argv);
*
* Perform all the setup for this application include setting up
* required modules, parsing options, etc. This function should be
* passed the same arguments that were passed into main().
*
* Returns to the caller if all setup succeeds. If anything fails,
* this function will cause the application to exit with a FAILURE
* exit status.
*/
static void
appSetup(
int argc,
char **argv)
{
SILK_FEATURES_DEFINE_STRUCT(features);
char errbuf[PCAP_ERRBUF_SIZE];
int arg_index;
/* verify same number of options and help strings */
assert((sizeof(appHelp)/sizeof(char*)) ==
(sizeof(appOptions)/sizeof(struct option)));
/* register the application */
skAppRegister(argv[0]);
skAppVerifyFeatures(&features, NULL);
skOptionsSetUsageCallback(&appUsageLong);
/* register the options */
if (skOptionsRegister(appOptions, &appOptionsHandler, NULL))
{
skAppPrintErr("Unable to register options");
exit(EXIT_FAILURE);
}
/* register the teardown handler */
if (atexit(appTeardown) < 0) {
skAppPrintErr("Unable to register appTeardown() with atexit()");
appTeardown();
exit(EXIT_FAILURE);
}
/* parse options */
arg_index = skOptionsParse(argc, argv);
if (arg_index < 0) {
skAppUsage(); /* never returns */
}
/* verify input file */
if (arg_index >= argc) {
skAppPrintErr("No input packet file found");
skAppUsage(); /* never returns */
}
/* verify output is not a terminal */
if (FILEIsATty(stdout)) {
skAppPrintErr("stdout is connected to a terminal");
skAppUsage(); /* never returns */
}
/* open input file */
g_pkt_input = pcap_open_offline(argv[arg_index], errbuf);
if (g_pkt_input == NULL) {
skAppPrintErr("Unable to open input file %s: %s",
argv[arg_index], errbuf);
exit(EXIT_FAILURE);
}
/* open output file (tcpdump format packet file) */
g_output = pcap_open_dead(pcap_datalink(g_pkt_input),
pcap_snapshot(g_pkt_input));
if (g_output == NULL) {
skAppPrintErr("Error opening stdout: %s", errbuf);
exit(EXIT_FAILURE);
}
g_output_dumper = pcap_dump_open(g_output, "-");
if (g_output_dumper == NULL) {
skAppPrintErr("Error opening stdout: %s", pcap_geterr(g_output));
exit(EXIT_FAILURE);
}
return; /* OK */
}