/* darkstat 3
- * copyright (c) 2001-2010 Emil Mikulic.
+ * copyright (c) 2001-2011 Emil Mikulic.
*
* darkstat.c: signals, cmdline parsing, program body.
*
#include "hosts_db.h"
#include "localip.h"
#include "ncache.h"
+#include "now.h"
#include "pidfile.h"
#include <assert.h>
#include <errno.h>
+#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pcap.h>
-#include "now.h"
-time_t now;
-
#ifndef INADDR_NONE
# define INADDR_NONE (-1) /* Solaris */
#endif
static void sig_shutdown(int signum _unused_) { running = 0; }
static volatile int reset_pending = 0, export_pending = 0;
-static void sig_reset(int signum _unused_)
-{
+static void sig_reset(int signum _unused_) {
reset_pending = 1;
export_pending = 1;
}
static void sig_export(int signum _unused_) { export_pending = 1; }
/* --- Commandline parsing --- */
-static unsigned long
-parsenum(const char *str, unsigned long max /* 0 for no max */)
-{
+static unsigned long parsenum(const char *str,
+ unsigned long max /* 0 for no max */) {
unsigned long n;
char *end;
return n;
}
-const char *opt_interface = NULL;
-static void cb_interface(const char *arg) { opt_interface = arg; }
+static int opt_iface_seen = 0;
+static void cb_interface(const char *arg) {
+ cap_add_ifname(arg);
+ opt_iface_seen = 1;
+}
+
+static void cb_filter(const char *arg) { cap_add_filter(arg); }
const char *opt_capfile = NULL;
static void cb_capfile(const char *arg) { opt_capfile = arg; }
static void cb_bindaddr(const char *arg) { http_add_bindaddr(arg); }
-const char *opt_filter = NULL;
-static void cb_filter(const char *arg) { opt_filter = arg; }
+static int is_localnet_specified = 0;
+static void cb_local(const char *arg)
+{
+ acct_init_localnet(arg);
+ is_localnet_specified = 1;
+}
-static void cb_local(const char *arg) { acct_init_localnet(arg); }
+int opt_want_local_only = 0;
+static void cb_local_only(const char *arg _unused_)
+{ opt_want_local_only = 1; }
const char *opt_chroot_dir = NULL;
static void cb_chroot(const char *arg) { opt_chroot_dir = arg; }
const char *opt_privdrop_user = NULL;
static void cb_user(const char *arg) { opt_privdrop_user = arg; }
-const char *daylog_fn = NULL;
+const char *opt_daylog_fn = NULL;
static void cb_daylog(const char *arg)
{
if (opt_chroot_dir == NULL)
errx(1, "the daylog file is relative to the chroot.\n"
"You must specify a --chroot dir before you can use --daylog.");
else
- daylog_fn = arg;
+ opt_daylog_fn = arg;
}
const char *import_fn = NULL;
{ opt_wait_secs = (int)parsenum(arg, 0); }
int opt_want_hexdump = 0;
-static void cb_hexdump(const char *arg _unused_) { opt_want_hexdump = 1; }
+static void cb_hexdump(const char *arg _unused_)
+{ opt_want_hexdump = 1; }
+
+int opt_want_help = 0;
+static void cb_help(const char *arg _unused_)
+{ opt_want_help = 1; }
+static void cb_version(const char *arg _unused_)
+{ opt_want_help = -1; }
/* --- */
};
static struct cmdline_arg cmdline_args[] = {
- {"-i", "interface", cb_interface, 0},
- {"-r", "file", cb_capfile, 0},
+ {"-i", "interface", cb_interface, -1},
+ {"-f", "filter", cb_filter, -1},
+ {"-r", "capfile", cb_capfile, 0},
+ {"-p", "port", cb_port, 0},
+ {"-b", "bindaddr", cb_bindaddr, -1},
+ {"-l", "network/netmask", cb_local, 0},
+ {"--local-only", NULL, cb_local_only, 0},
{"--snaplen", "bytes", cb_snaplen, 0},
{"--pppoe", NULL, cb_pppoe, 0},
{"--syslog", NULL, cb_syslog, 0},
{"--no-dns", NULL, cb_no_dns, 0},
{"--no-macs", NULL, cb_no_macs, 0},
{"--no-lastseen", NULL, cb_no_lastseen, 0},
- {"-p", "port", cb_port, 0},
- {"-b", "bindaddr", cb_bindaddr, -1},
- {"-f", "filter", cb_filter, 0},
- {"-l", "network/netmask", cb_local, 0},
{"--chroot", "dir", cb_chroot, 0},
{"--user", "username", cb_user, 0},
{"--daylog", "filename", cb_daylog, 0},
{"--highest-port", "port", cb_highest_port, 0},
{"--wait", "secs", cb_wait_secs, 0},
{"--hexdump", NULL, cb_hexdump, 0},
+ {"--version", NULL, cb_version, 0},
+ {"--help", NULL, cb_help, 0},
{NULL, NULL, NULL, 0}
};
-static void
-pad(const int width)
-{
- int i;
- for (i=0; i<width; i++) printf(" ");
-}
-
-/*
- * We autogenerate the usage statement from the cmdline_args data structure.
- */
-static void
-usage(void)
-{
- int width, first;
+/* We autogenerate the usage statement from the cmdline_args data structure. */
+static void usage(void) {
+ static char intro[] = "usage: darkstat ";
+ char indent[sizeof(intro)];
struct cmdline_arg *arg;
- printf(PACKAGE_STRING " (built with libpcap %d.%d)\n\n",
- PCAP_VERSION_MAJOR, PCAP_VERSION_MINOR);
+ printf(PACKAGE_STRING " (using %s)\n", pcap_lib_version());
+ if (opt_want_help == -1) return;
- width = printf("usage: darkstat ");
- first = 1;
+ memset(indent, ' ', sizeof(indent));
+ indent[0] = indent[sizeof(indent) - 1] = 0;
+ printf("\n%s", intro);
for (arg = cmdline_args; arg->name != NULL; arg++) {
- if (first) first = 0; else pad(width);
- printf("[ %s", arg->name);
- if (arg->arg_name != NULL) printf(" %s", arg->arg_name);
- printf(" ]\n");
+ printf("%s[ %s%s%s ]\n",
+ indent,
+ arg->name,
+ arg->arg_name != NULL ? " " : "",
+ arg->arg_name != NULL ? arg->arg_name : "");
+ indent[0] = ' ';
}
printf("\n"
"Please refer to the darkstat(8) manual page for further\n"
"documentation and usage examples.\n");
}
-static void
-parse_sub_cmdline(const int argc, char * const *argv)
-{
+static void parse_sub_cmdline(const int argc, char * const *argv) {
struct cmdline_arg *arg;
if (argc == 0) return;
exit(EXIT_FAILURE);
}
-static void
-parse_cmdline(const int argc, char * const *argv)
-{
+static void parse_cmdline(const int argc, char * const *argv) {
if (argc < 1) {
/* Not enough args. */
usage();
parse_sub_cmdline(argc, argv);
+ if (opt_want_help) {
+ usage();
+ exit(EXIT_SUCCESS);
+ }
+
/* start syslogging as early as possible */
- if (opt_want_syslog) openlog("darkstat", LOG_NDELAY | LOG_PID, LOG_DAEMON);
+ if (opt_want_syslog)
+ openlog("darkstat", LOG_NDELAY | LOG_PID, LOG_DAEMON);
/* some default values */
- if (opt_chroot_dir == NULL) opt_chroot_dir = CHROOT_DIR;
- if (opt_privdrop_user == NULL) opt_privdrop_user = PRIVDROP_USER;
+ if (opt_chroot_dir == NULL)
+ opt_chroot_dir = CHROOT_DIR;
+ if (opt_privdrop_user == NULL)
+ opt_privdrop_user = PRIVDROP_USER;
/* sanity check args */
- if ((opt_interface == NULL) && (opt_capfile == NULL))
+ if (!opt_iface_seen && opt_capfile == NULL)
errx(1, "must specify either interface (-i) or capture file (-r)");
- if ((opt_interface != NULL) && (opt_capfile != NULL))
+ if (opt_iface_seen && opt_capfile != NULL)
errx(1, "can't specify both interface (-i) and capture file (-r)");
if ((opt_hosts_max != 0) && (opt_hosts_keep >= opt_hosts_max)) {
opt_want_daemonize = 0;
verbosef("--hexdump implies --no-daemon");
}
+
+ if (opt_want_local_only && !is_localnet_specified)
+ verbosef("WARNING: --local-only without -l only matches the local host");
}
-static void
-run_from_capfile(void)
-{
+static void run_from_capfile(void) {
+ now_init();
graph_init();
hosts_db_init();
- cap_from_file(opt_capfile, opt_filter);
- cap_stop();
+ cap_from_file(opt_capfile);
if (export_fn != NULL) db_export(export_fn);
hosts_db_free();
graph_free();
- verbosef("Total packets: %qu, bytes: %qu",
- acct_total_packets, acct_total_bytes);
+ verbosef("Total packets: %llu, bytes: %llu",
+ (unsigned long long)acct_total_packets,
+ (unsigned long long)acct_total_bytes);
}
/* --- Program body --- */
parse_cmdline(argc-1, argv+1);
if (opt_capfile) {
- /*
- * This is very different from a regular run against a network
- * interface.
- */
run_from_capfile();
return 0;
}
/* do this first as it forks - minimize memory use */
if (opt_want_dns) dns_init(opt_privdrop_user);
- cap_init(opt_interface, opt_filter, opt_want_promisc); /* needs root */
+ cap_start(opt_want_promisc); /* needs root */
http_listen(opt_bindport);
ncache_init(); /* must do before chroot() */
privdrop(opt_chroot_dir, opt_privdrop_user);
/* Don't need root privs for these: */
- now = time(NULL);
- if (daylog_fn != NULL) daylog_init(daylog_fn);
+ now_init();
+ if (opt_daylog_fn != NULL) daylog_init(opt_daylog_fn);
graph_init();
hosts_db_init();
if (import_fn != NULL) db_import(import_fn);
- localip_init(opt_interface);
if (signal(SIGTERM, sig_shutdown) == SIG_ERR)
errx(1, "signal(SIGTERM) failed");
while (running) {
int select_ret, max_fd = -1, use_timeout = 0;
struct timeval timeout;
+ struct timespec t;
fd_set rs, ws;
- now = time(NULL);
-
- if (export_pending) {
- if (export_fn != NULL)
- db_export(export_fn);
- export_pending = 0;
- }
-
- if (reset_pending) {
- hosts_db_reset();
- graph_reset();
- reset_pending = 0;
- }
-
FD_ZERO(&rs);
FD_ZERO(&ws);
-
cap_fd_set(&rs, &max_fd, &timeout, &use_timeout);
http_fd_set(&rs, &ws, &max_fd, &timeout, &use_timeout);
select_ret = select(max_fd+1, &rs, &ws, NULL,
(use_timeout) ? &timeout : NULL);
-
- if ((select_ret == 0) && (!use_timeout))
+ if (select_ret == 0 && !use_timeout)
errx(1, "select() erroneously timed out");
-
if (select_ret == -1) {
if (errno == EINTR)
continue;
else
err(1, "select()");
}
- else {
- graph_rotate();
- cap_poll(&rs);
- dns_poll();
- http_poll(&rs, &ws);
+
+ timer_start(&t);
+ now_update();
+
+ if (export_pending) {
+ if (export_fn != NULL)
+ db_export(export_fn);
+ export_pending = 0;
+ }
+
+ if (reset_pending) {
+ if (export_pending)
+ continue; /* export before reset */
+ hosts_db_reset();
+ graph_reset();
+ reset_pending = 0;
}
+
+ graph_rotate();
+ cap_poll(&rs);
+ dns_poll();
+ http_poll(&rs, &ws);
+ timer_stop(&t, 1000000000, "event processing took longer than a second");
}
verbosef("shutting down");
if (export_fn != NULL) db_export(export_fn);
hosts_db_free();
graph_free();
- if (daylog_fn != NULL) daylog_free();
+ if (opt_daylog_fn != NULL) daylog_free();
ncache_free();
if (pid_fn) pidfile_unlink();
verbosef("shut down");
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