mirror of
https://gitlab.isc.org/isc-projects/dhcp
synced 2025-08-30 13:57:50 +00:00
- Cut some things out into subroutines to support tracing.
- Do all the relevant tracing setup. - Clarify ddns-update-style startup error message. - Print version information and exit if --version is given.
This commit is contained in:
Ted Lemon
387
server/dhcpd.c
387
server/dhcpd.c
@@ -43,7 +43,7 @@
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#ifndef lint
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static char ocopyright[] =
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"$Id: dhcpd.c,v 1.109 2001/01/25 08:32:57 mellon Exp $ Copyright 1995-2001 Internet Software Consortium.";
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"$Id: dhcpd.c,v 1.110 2001/02/12 21:04:06 mellon Exp $ Copyright 1995-2001 Internet Software Consortium.";
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#endif
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static char copyright[] =
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@@ -165,6 +165,11 @@ const char *path_dhcpd_pid = _PATH_DHCPD_PID;
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int dhcp_max_agent_option_packet_length = DHCP_MTU_MAX;
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static omapi_auth_key_t *omapi_key = (omapi_auth_key_t *)0;
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int omapi_port;
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#if defined (TRACING)
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trace_type_t *trace_srandom;
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#endif
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static isc_result_t verify_addr (omapi_object_t *l, omapi_addr_t *addr) {
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return ISC_R_SUCCESS;
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@@ -197,18 +202,16 @@ int main (argc, argv, envp)
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omapi_object_t *listener;
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unsigned seed;
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struct interface_info *ip;
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struct data_string db;
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struct option_cache *oc;
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struct option_state *options = (struct option_state *)0;
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struct parse *parse;
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int lose;
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int omapi_port;
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omapi_object_t *auth;
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struct tsig_key *key;
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omapi_typed_data_t *td;
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int no_dhcpd_conf = 0;
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int no_dhcpd_db = 0;
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int no_dhcpd_pid = 0;
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char *traceinfile = (char *)0;
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char *traceoutfile = (char *)0;
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/* Set up the client classification system. */
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classification_setup ();
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@@ -294,6 +297,18 @@ int main (argc, argv, envp)
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} else if (!strcmp (argv [i], "-q")) {
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quiet = 1;
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quiet_interface_discovery = 1;
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} else if (!strcmp (argv [i], "--version")) {
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log_info ("isc-dhcpd-%s", DHCP_VERSION);
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exit (0);
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} else if (!strcmp (argv [i], "-tf")) {
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if (++i == argc)
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usage ();
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traceoutfile = argv [i];
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} else if (!strcmp (argv [i], "-play")) {
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if (++i == argc)
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usage ();
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traceinfile = argv [i];
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trace_replay_init ();
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} else if (argv [i][0] == '-') {
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usage ();
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} else {
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@@ -335,17 +350,34 @@ int main (argc, argv, envp)
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log_perror = 0;
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}
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#if defined (TRACING)
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trace_init (set_time, MDL);
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if (traceoutfile)
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trace_begin (traceoutfile, MDL);
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interface_trace_setup ();
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parse_trace_setup ();
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trace_srandom = trace_type_register ("random-seed", (void *)0,
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trace_seed_input,
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trace_seed_stop, MDL);
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#endif
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/* Default to the DHCP/BOOTP port. */
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if (!local_port)
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{
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ent = getservbyname ("dhcp", "udp");
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if (!ent)
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local_port = htons (67);
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else
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local_port = ent -> s_port;
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if ((s = getenv ("DHCPD_PORT"))) {
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local_port = htons (atoi (s));
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log_debug ("binding to environment-specified port %d",
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ntohs (local_port));
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} else {
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ent = getservbyname ("dhcp", "udp");
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if (!ent)
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local_port = htons (67);
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else
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local_port = ent -> s_port;
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#ifndef __CYGWIN32__ /* XXX */
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endservent ();
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endservent ();
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#endif
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}
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}
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remote_port = htons (ntohs (local_port) + 1);
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@@ -380,6 +412,10 @@ int main (argc, argv, envp)
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log_fatal ("Can't allocate root group!");
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root_group -> authoritative = 0;
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/* Set up various hooks. */
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dhcp_interface_setup_hook = dhcpd_interface_setup_hook;
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bootp_packet_handler = do_packet;
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#if defined (NSUPDATE)
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/* Set up the standard name service updater routine. */
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parse = (struct parse *)0;
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@@ -398,6 +434,22 @@ int main (argc, argv, envp)
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end_parse (&parse);
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#endif
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/* Initialize icmp support... */
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icmp_startup (1, lease_pinged);
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#if defined (TRACING)
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if (traceinfile) {
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if (!no_dhcpd_db) {
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log_error ("%s", "");
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log_error ("** You must specify a lease file with -lf.");
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log_error (" Dhcpd will not overwrite your default");
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log_fatal (" lease file when playing back a trace. **");
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}
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trace_file_replay (traceinfile);
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exit (0);
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}
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#endif
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/* Read the dhcpd.conf file... */
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if (readconf () != ISC_R_SUCCESS)
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log_fatal ("Configuration file errors encountered -- exiting");
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@@ -406,6 +458,148 @@ int main (argc, argv, envp)
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if (cftest && !lftest)
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exit(0);
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postconf_initialization (quiet);
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group_write_hook = group_writer;
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/* Start up the database... */
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db_startup (lftest);
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if (lftest)
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exit (0);
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/* Discover all the network interfaces and initialize them. */
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discover_interfaces (DISCOVER_SERVER);
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/* Make up a seed for the random number generator from current
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time plus the sum of the last four bytes of each
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interface's hardware address interpreted as an integer.
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Not much entropy, but we're booting, so we're not likely to
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find anything better. */
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seed = 0;
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for (ip = interfaces; ip; ip = ip -> next) {
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int junk;
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memcpy (&junk,
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&ip -> hw_address.hbuf [ip -> hw_address.hlen -
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sizeof seed], sizeof seed);
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seed += junk;
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}
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srandom (seed + cur_time);
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#if defined (TRACING)
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trace_seed_stash (trace_srandom, seed + cur_time);
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#endif
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/* Start up a listener for the object management API protocol. */
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if (omapi_port != -1) {
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listener = (omapi_object_t *)0;
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result = omapi_generic_new (&listener, MDL);
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if (result != ISC_R_SUCCESS)
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log_fatal ("Can't allocate new generic object: %s",
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isc_result_totext (result));
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result = omapi_protocol_listen (listener,
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(unsigned)omapi_port, 1);
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if (result == ISC_R_SUCCESS && omapi_key)
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result = omapi_protocol_configure_security
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(listener, verify_addr, verify_auth);
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if (result != ISC_R_SUCCESS)
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log_fatal ("Can't start OMAPI protocol: %s",
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isc_result_totext (result));
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}
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#if defined (FAILOVER_PROTOCOL)
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/* Start the failover protocol. */
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dhcp_failover_startup ();
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#endif
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#ifndef DEBUG
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if (daemon) {
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/* First part of becoming a daemon... */
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if ((pid = fork ()) < 0)
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log_fatal ("Can't fork daemon: %m");
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else if (pid)
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exit (0);
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}
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/* Read previous pid file. */
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if ((i = open (path_dhcpd_pid, O_RDONLY)) >= 0) {
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status = read (i, pbuf, (sizeof pbuf) - 1);
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close (i);
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pbuf [status] = 0;
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pid = atoi (pbuf);
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/* If the previous server process is not still running,
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write a new pid file immediately. */
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if (pid && (pid == getpid() || kill (pid, 0) < 0)) {
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unlink (path_dhcpd_pid);
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if ((i = open (path_dhcpd_pid,
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O_WRONLY | O_CREAT, 0640)) >= 0) {
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sprintf (pbuf, "%d\n", (int)getpid ());
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write (i, pbuf, strlen (pbuf));
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close (i);
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pidfilewritten = 1;
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}
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} else
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log_fatal ("There's already a DHCP server running.");
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}
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/* If we were requested to log to stdout on the command line,
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keep doing so; otherwise, stop. */
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if (log_perror == -1)
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log_perror = 1;
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else
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log_perror = 0;
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if (daemon) {
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/* Become session leader and get pid... */
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close (0);
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close (1);
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close (2);
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pid = setsid ();
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}
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/* If we didn't write the pid file earlier because we found a
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process running the logged pid, but we made it to here,
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meaning nothing is listening on the bootp port, then write
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the pid file out - what's in it now is bogus anyway. */
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if (!pidfilewritten) {
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unlink (path_dhcpd_pid);
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if ((i = open (path_dhcpd_pid,
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O_WRONLY | O_CREAT, 0640)) >= 0) {
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sprintf (pbuf, "%d\n", (int)getpid ());
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write (i, pbuf, strlen (pbuf));
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close (i);
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pidfilewritten = 1;
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}
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}
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#endif /* !DEBUG */
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#if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL)
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dmalloc_cutoff_generation = dmalloc_generation;
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dmalloc_longterm = dmalloc_outstanding;
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dmalloc_outstanding = 0;
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#endif
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#if defined (DEBUG_RC_HISTORY_EXHAUSTIVELY)
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dump_rc_history ();
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#endif
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/* Receive packets and dispatch them... */
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dispatch ();
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/* Not reached */
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return 0;
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}
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void postconf_initialization (int quiet)
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{
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struct option_state *options = (struct option_state *)0;
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struct data_string db;
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struct option_cache *oc;
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char *s;
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isc_result_t result;
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struct parse *parse;
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int tmp;
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/* Now try to get the lease file name. */
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option_state_allocate (&options, MDL);
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@@ -552,13 +746,14 @@ int main (argc, argv, envp)
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}
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} else {
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log_info ("%s", "");
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log_error ("** You must set ddns-update-style before %s",
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"dhcpd will run. **");
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log_error ("** To get the same behaviour as in 3.0b2pl11 %s",
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log_error ("** You must add a ddns-update-style %s%s.",
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"statement to ", path_dhcpd_conf);
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log_error (" To get the same behaviour as in 3.0b2pl11 %s",
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"and previous");
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log_error (" versions, use \"ddns-update-style ad-hoc;\" **");
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log_fatal ("ddns-update-style is documented in the %s",
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"dhcpd.conf manual page.");
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log_error (" versions, add a line that says \"%s\"",
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"ddns-update-style ad-hoc;");
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log_fatal (" Please read the dhcpd.conf manual page %s",
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"for more information. **");
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}
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oc = lookup_option (&server_universe, options, SV_LOG_FACILITY);
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@@ -578,12 +773,18 @@ int main (argc, argv, envp)
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openlog ("dhcpd",
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LOG_NDELAY, db.data [0]);
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#endif
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/* Log the startup banner into the new
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log file. */
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if (!quiet) {
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/* Don't log to stderr twice. */
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tmp = log_perror;
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log_perror = 0;
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log_info ("%s %s",
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message, DHCP_VERSION);
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log_info (copyright);
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log_info (arr);
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log_info (url);
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log_perror = tmp;
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}
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} else
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log_fatal ("invalid log facility");
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@@ -619,167 +820,35 @@ int main (argc, argv, envp)
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/* Set up the standard name service updater routine. */
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parse = (struct parse *)0;
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status = new_parse (&parse, -1,
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old_nsupdate, (sizeof old_nsupdate) - 1,
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"old name service update routine");
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if (status != ISC_R_SUCCESS)
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result = new_parse (&parse, -1,
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old_nsupdate, (sizeof old_nsupdate) - 1,
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"old name service update routine");
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if (result != ISC_R_SUCCESS)
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log_fatal ("can't begin parsing old ddns updater!");
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lose = 0;
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tmp = 0;
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if (!(parse_executable_statements (e, parse,
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&lose, context_any))) {
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&tmp, context_any))) {
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end_parse (&parse);
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log_fatal ("can't parse standard ddns updater!");
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}
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end_parse (&parse);
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}
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#endif
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group_write_hook = group_writer;
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/* Start up the database... */
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db_startup (lftest);
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if (lftest)
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exit (0);
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dhcp_interface_setup_hook = dhcpd_interface_setup_hook;
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/* Discover all the network interfaces and initialize them. */
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discover_interfaces (DISCOVER_SERVER);
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/* Make up a seed for the random number generator from current
|
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time plus the sum of the last four bytes of each
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interface's hardware address interpreted as an integer.
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Not much entropy, but we're booting, so we're not likely to
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find anything better. */
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seed = 0;
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for (ip = interfaces; ip; ip = ip -> next) {
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int junk;
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memcpy (&junk,
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&ip -> hw_address.hbuf [ip -> hw_address.hlen -
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sizeof seed], sizeof seed);
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seed += junk;
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}
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srandom (seed + cur_time);
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/* Initialize icmp support... */
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icmp_startup (1, lease_pinged);
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/* Start up a listener for the object management API protocol. */
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if (omapi_port != -1) {
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listener = (omapi_object_t *)0;
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result = omapi_generic_new (&listener, MDL);
|
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if (result != ISC_R_SUCCESS)
|
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log_fatal ("Can't allocate new generic object: %s",
|
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isc_result_totext (result));
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result = omapi_protocol_listen (listener,
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(unsigned)omapi_port, 1);
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if (result == ISC_R_SUCCESS && omapi_key)
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result = omapi_protocol_configure_security
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(listener, verify_addr, verify_auth);
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if (result != ISC_R_SUCCESS)
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log_fatal ("Can't start OMAPI protocol: %s",
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isc_result_totext (result));
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}
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#if defined (FAILOVER_PROTOCOL)
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/* Start the failover protocol. */
|
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dhcp_failover_startup ();
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#endif
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#ifndef DEBUG
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if (daemon) {
|
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/* First part of becoming a daemon... */
|
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if ((pid = fork ()) < 0)
|
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log_fatal ("Can't fork daemon: %m");
|
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else if (pid)
|
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exit (0);
|
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}
|
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|
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/* Read previous pid file. */
|
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if ((i = open (path_dhcpd_pid, O_RDONLY)) >= 0) {
|
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status = read (i, pbuf, (sizeof pbuf) - 1);
|
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close (i);
|
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pbuf [status] = 0;
|
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pid = atoi (pbuf);
|
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|
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/* If the previous server process is not still running,
|
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write a new pid file immediately. */
|
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if (pid && (pid == getpid() || kill (pid, 0) < 0)) {
|
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unlink (path_dhcpd_pid);
|
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if ((i = open (path_dhcpd_pid,
|
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O_WRONLY | O_CREAT, 0640)) >= 0) {
|
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sprintf (pbuf, "%d\n", (int)getpid ());
|
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write (i, pbuf, strlen (pbuf));
|
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close (i);
|
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pidfilewritten = 1;
|
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}
|
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} else
|
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log_fatal ("There's already a DHCP server running.");
|
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}
|
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|
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/* If we were requested to log to stdout on the command line,
|
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keep doing so; otherwise, stop. */
|
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if (log_perror == -1)
|
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log_perror = 1;
|
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else
|
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log_perror = 0;
|
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|
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if (daemon) {
|
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/* Become session leader and get pid... */
|
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close (0);
|
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close (1);
|
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close (2);
|
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pid = setsid ();
|
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}
|
||||
|
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/* If we didn't write the pid file earlier because we found a
|
||||
process running the logged pid, but we made it to here,
|
||||
meaning nothing is listening on the bootp port, then write
|
||||
the pid file out - what's in it now is bogus anyway. */
|
||||
if (!pidfilewritten) {
|
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unlink (path_dhcpd_pid);
|
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if ((i = open (path_dhcpd_pid,
|
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O_WRONLY | O_CREAT, 0640)) >= 0) {
|
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sprintf (pbuf, "%d\n", (int)getpid ());
|
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write (i, pbuf, strlen (pbuf));
|
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close (i);
|
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pidfilewritten = 1;
|
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}
|
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}
|
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#endif /* !DEBUG */
|
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/* Set up the bootp packet handler... */
|
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bootp_packet_handler = do_packet;
|
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|
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#if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL)
|
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dmalloc_cutoff_generation = dmalloc_generation;
|
||||
dmalloc_longterm = dmalloc_outstanding;
|
||||
dmalloc_outstanding = 0;
|
||||
#endif
|
||||
|
||||
#if defined (DEBUG_RC_HISTORY_EXHAUSTIVELY)
|
||||
dump_rc_history ();
|
||||
#endif
|
||||
|
||||
/* Receive packets and dispatch them... */
|
||||
dispatch ();
|
||||
|
||||
/* Not reached */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Print usage message. */
|
||||
|
||||
static void usage ()
|
||||
{
|
||||
log_info (message);
|
||||
log_info ("%s %s", message, DHCP_VERSION);
|
||||
log_info (copyright);
|
||||
log_info (arr);
|
||||
|
||||
log_fatal ("Usage: dhcpd [-p <UDP port #>] [-d] [-f]%s%s",
|
||||
log_fatal ("Usage: dhcpd [-p <UDP port #>] [-d] [-f]%s%s%s%s",
|
||||
"\n [-cf config-file] [-lf lease-file]",
|
||||
"\n [-tf trace-output-file]",
|
||||
"\n [-play trace-input-file]",
|
||||
"\n [-t] [-T] [-s server] [if0 [...ifN]]");
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user