diff -up dhcp-4.0.0/common/conflex.c.options dhcp-4.0.0/common/conflex.c
--- dhcp-4.0.0/common/conflex.c.options	2007-12-29 11:13:51.000000000 -1000
+++ dhcp-4.0.0/common/conflex.c	2007-12-29 11:13:51.000000000 -1000
@@ -769,6 +769,8 @@ intern(char *atom, enum dhcp_token dfv) 
 			return BALANCE;
 		if (!strcasecmp (atom + 1, "ound"))
 			return BOUND;
+		if (!strcasecmp (atom + 1, "ootp-broadcast-always"))
+			return BOOTP_BROADCAST_ALWAYS;
 		break;
 	      case 'c':
 		if (!strcasecmp (atom + 1, "ase"))
diff -up dhcp-4.0.0/includes/dhcpd.h.options dhcp-4.0.0/includes/dhcpd.h
--- dhcp-4.0.0/includes/dhcpd.h.options	2007-12-29 11:13:51.000000000 -1000
+++ dhcp-4.0.0/includes/dhcpd.h	2007-12-29 11:13:51.000000000 -1000
@@ -1055,6 +1055,9 @@ struct client_config {
 	int do_forward_update;		/* If nonzero, and if we have the
 					   information we need, update the
 					   A record for the address we get. */
+
+	int bootp_broadcast_always;	/* If nonzero, always set the BOOTP_BROADCAST
+					   flag in requests */
 };
 
 /* Per-interface state used in the dhcp client... */
diff -up dhcp-4.0.0/includes/dhctoken.h.options dhcp-4.0.0/includes/dhctoken.h
--- dhcp-4.0.0/includes/dhctoken.h.options	2007-10-31 09:13:33.000000000 -1000
+++ dhcp-4.0.0/includes/dhctoken.h	2007-12-29 11:13:51.000000000 -1000
@@ -345,7 +345,8 @@ enum dhcp_token {
 	RANGE6 = 648,
 	WHITESPACE = 649,
 	TOKEN_ALSO = 650,
-	AFTER = 651
+	AFTER = 651,
+	BOOTP_BROADCAST_ALWAYS = 652
 };
 
 #define is_identifier(x)	((x) >= FIRST_TOKEN &&	\
diff -up dhcp-4.0.0/client/dhclient.c.options dhcp-4.0.0/client/dhclient.c
--- dhcp-4.0.0/client/dhclient.c.options	2007-11-30 11:51:42.000000000 -1000
+++ dhcp-4.0.0/client/dhclient.c	2007-12-29 11:14:15.000000000 -1000
@@ -37,6 +37,12 @@
 #include <sys/wait.h>
 #include <limits.h>
 
+/*
+ * Defined in stdio.h when _GNU_SOURCE is set, but we don't want to define
+ * that when building ISC code.
+ */
+extern int asprintf(char **strp, const char *fmt, ...);
+
 TIME default_lease_time = 43200; /* 12 hours... */
 TIME max_lease_time = 86400; /* 24 hours... */
 
@@ -75,6 +81,9 @@ int onetry=0;
 int quiet=1;
 int nowait=0;
 char *mockup_relay = NULL;
+int bootp_broadcast_always = 0;
+
+extern u_int32_t default_requested_options[];
 
 static void usage PROTO ((void));
 
@@ -100,6 +109,15 @@ main(int argc, char **argv) {
 	int no_dhclient_script = 0;
 	int local_family_set = 0;
 	char *s;
+	char *dhcp_client_identifier_arg = NULL;
+	char *dhcp_host_name_arg = NULL;
+	char *dhcp_fqdn_arg = NULL;
+	char *dhcp_vendor_class_identifier_arg = NULL;
+	char *dhclient_request_options = NULL;
+
+	int timeout_arg = 0;
+	char *arg_conf = NULL;
+	int arg_conf_len = 0;
 
 	/* Initialize client globals. */
 	memset(&default_duid, 0, sizeof(default_duid));
@@ -224,6 +242,88 @@ main(int argc, char **argv) {
 		} else if (!strcmp (argv [i], "--version")) {
 			log_info ("isc-dhclient-%s", PACKAGE_VERSION);
 			exit (0);
+		} else if (!strcmp (argv [i], "-I")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			if (strlen(argv[i]) >= DHCP_MAX_OPTION_LEN) {
+				log_error("-I option dhcp-client-identifier string \"%s\" is too long - maximum length is: %d",  argv[i], DHCP_MAX_OPTION_LEN-1);
+				exit(1);
+			}
+
+			dhcp_client_identifier_arg = argv[i];
+		} else if (!strcmp (argv [i], "-B")) {
+			bootp_broadcast_always = 1;
+		} else if (!strcmp (argv [i], "-H")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			if (strlen(argv[i]) >= DHCP_MAX_OPTION_LEN) {
+				log_error("-H option host-name string \"%s\" is too long - maximum length is: %d",  argv[i], DHCP_MAX_OPTION_LEN-1);
+				exit(1);
+			}
+
+			if (dhcp_host_name_arg != NULL) {
+				log_error("The -H <host-name> and -F <fqdn> arguments are mutually exclusive");
+				exit(1);
+			}
+
+			dhcp_host_name_arg = argv[i];
+		} else if (!strcmp (argv [i], "-F")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			if (strlen(argv[i]) >= DHCP_MAX_OPTION_LEN) {
+				log_error("-F option fqdn.fqdn string \"%s\" is too long - maximum length is: %d",  argv[i], DHCP_MAX_OPTION_LEN-1);
+				exit(1);
+			}
+
+			if (dhcp_fqdn_arg != NULL) {
+				log_error("Only one -F <fqdn> argument can be specified");
+				exit(1);
+			}
+
+			if (dhcp_host_name_arg != NULL) {
+				log_error("The -F <fqdn> and -H <host-name> arguments are mutually exclusive");
+				exit(1);
+			}
+
+			dhcp_fqdn_arg = argv[i];
+		} else if (!strcmp (argv [i], "-T")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			if ((timeout_arg = atoi(argv[i])) <= 0) {
+				log_error("-T timeout option must be > 0 - bad value: %s",argv[i]);
+				exit(1);
+			}
+		} else if (!strcmp (argv [i], "-V")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			if (strlen(argv[i]) >= DHCP_MAX_OPTION_LEN) {
+				log_error("-V option vendor-class-identifier string \"%s\" is too long - maximum length is: %d",  argv[i], DHCP_MAX_OPTION_LEN-1);
+				exit(1);
+			}
+
+			dhcp_vendor_class_identifier_arg = argv[i];
+		} else if (!strcmp (argv [i], "-R")) {
+			if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
+				usage ();
+				return EXIT_FAILURE;
+			}
+
+			dhclient_request_options=argv[i];
  		} else if (argv [i][0] == '-') {
  		    usage ();
 		} else {
@@ -370,6 +470,166 @@ main(int argc, char **argv) {
 	/* Parse the dhclient.conf file. */
 	read_client_conf ();
 
+	/* Parse any extra command line configuration arguments: */
+	if ((dhcp_client_identifier_arg != NULL) && (*dhcp_client_identifier_arg != '\0')) {
+		arg_conf_len = asprintf(&arg_conf, "send dhcp-client-identifier \"%s\";", dhcp_client_identifier_arg);
+
+		if ((arg_conf == 0) || (arg_conf_len <= 0))
+			log_fatal("Unable to send -I option dhcp-client-identifier");
+	}
+
+	if ((dhcp_host_name_arg != NULL) && (*dhcp_host_name_arg != '\0')) {
+		if (arg_conf == 0) {
+			arg_conf_len = asprintf(&arg_conf, "send host-name \"%s\";", dhcp_host_name_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to send -H option host-name");
+		} else {
+			char *last_arg_conf = arg_conf;
+			arg_conf = NULL;
+			arg_conf_len = asprintf( &arg_conf, "%s\nsend host-name \"%s\";", last_arg_conf, dhcp_host_name_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to send -H option host-name");
+
+			free(last_arg_conf);
+		}
+	}
+
+	if ((dhcp_fqdn_arg != NULL) && (*dhcp_fqdn_arg != '\0')) {
+		if (arg_conf == 0) {
+			arg_conf_len = asprintf(&arg_conf,  "send fqdn.fqdn \"%s\";", dhcp_fqdn_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to send -F option fqdn.fqdn");
+		} else {
+			char *last_arg_conf = arg_conf;
+			arg_conf = NULL;
+			arg_conf_len = asprintf( &arg_conf, "%s\nsend fqdn.fqdn \"%s\";", last_arg_conf, dhcp_fqdn_arg);
+
+			if ((arg_conf == 0)  || (arg_conf_len <= 0))
+				log_fatal("Unable to send -F option fqdn.fqdn");
+
+			free(last_arg_conf);
+		}
+	}
+
+	if (timeout_arg) {
+		if (arg_conf == 0) {
+			arg_conf_len = asprintf(&arg_conf,  "timeout %d;", timeout_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to process -T timeout argument");
+		} else {
+			char *last_arg_conf = arg_conf;
+			arg_conf = NULL;
+			arg_conf_len = asprintf( &arg_conf, "%s\ntimeout %d;", last_arg_conf, timeout_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len == 0))
+				log_fatal("Unable to process -T timeout argument");
+
+			free(last_arg_conf);
+		}
+	}
+
+	if ((dhcp_vendor_class_identifier_arg != NULL) && (*dhcp_vendor_class_identifier_arg != '\0')) {
+		if (arg_conf == 0) {
+			arg_conf_len = asprintf(&arg_conf,  "send vendor-class-identifier \"%s\";", dhcp_vendor_class_identifier_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to send -V option vendor-class-identifier");
+		} else {
+			char *last_arg_conf = arg_conf;
+			arg_conf = NULL;
+			arg_conf_len = asprintf(&arg_conf, "%s\nsend vendor-class-identifier \"%s\";", last_arg_conf, dhcp_vendor_class_identifier_arg);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to send -V option vendor-class-identifier");
+
+			free(last_arg_conf);
+		}
+	}
+
+	if (dhclient_request_options != NULL) {
+		if (arg_conf == 0) {
+			arg_conf_len = asprintf(&arg_conf,  "request %s;", dhclient_request_options);
+
+			if ((arg_conf == 0) || (arg_conf_len <= 0))
+				log_fatal("Unable to parse -R <request options list> argument");
+		} else {
+			char *last_arg_conf = arg_conf;
+			arg_conf = NULL;
+			arg_conf_len = asprintf(&arg_conf, "%s\nrequest %s;", last_arg_conf, dhclient_request_options);
+
+			if ((arg_conf == 0)  || (arg_conf_len <= 0))
+				log_fatal("Unable to parse -R <request options list> argument");
+
+			free(last_arg_conf);
+		}
+	}
+
+	if (arg_conf) {
+		if (arg_conf_len == 0)
+			if ((arg_conf_len = strlen(arg_conf)) == 0)
+				/* huh ? cannot happen ! */
+				log_fatal("Unable to process -I/-H/-F/-T/-V/-R configuration arguments");
+
+		/* parse the extra dhclient.conf configuration arguments
+		 * into top level config: */
+		struct parse *cfile = (struct parse *)0;
+		const char *val = NULL;
+		int token;
+
+		status = new_parse (&cfile, -1, arg_conf, arg_conf_len, "extra dhclient -I/-H/-F/-T/-V/-R configuration arguments", 0);
+
+		if ((status != ISC_R_SUCCESS) || (cfile -> warnings_occurred))
+			log_fatal("Cannot parse -I/-H/-F/-T/-V/-R configuration arguments !");
+		/* more detailed parse failures will be logged */
+
+		do {
+			token = peek_token (&val, (unsigned *)0, cfile);
+			if (token == END_OF_FILE)
+				break;
+
+			parse_client_statement (cfile, (struct interface_info *)0, &top_level_config);
+		} while (1);
+
+		if (cfile -> warnings_occurred)
+			log_fatal ("Cannot parse -I/-H/-F/-T/-V/-R configuration arguments !");
+		end_parse (&cfile);
+
+		if (timeout_arg) {
+			/* we just set the toplevel timeout, but per-client
+			 * timeouts may still be at defaults. Also, it makes no
+			 * sense having the reboot_timeout or backoff_cutoff
+			 * greater than the timeout:
+			 */
+			if ((top_level_config.backoff_cutoff == 15) && (top_level_config.backoff_cutoff > (timeout_arg / 2)))
+				top_level_config.backoff_cutoff = (((unsigned long)(timeout_arg / 2)) == 0) ? timeout_arg : (unsigned long)(timeout_arg / 2);
+
+			for (ip = interfaces; ip; ip = ip -> next) {
+				if (ip->client->config->timeout == 60)
+					ip->client->config->timeout = timeout_arg;
+
+				if ((ip->client->config->reboot_timeout == 10) && (ip->client->config->reboot_timeout > ip->client->config->timeout))
+					ip->client->config->reboot_timeout = ip->client->config->timeout;
+				if ((ip->client->config->backoff_cutoff == 15) && (ip->client->config->backoff_cutoff > top_level_config.backoff_cutoff))
+					ip->client->config->backoff_cutoff = top_level_config.backoff_cutoff;
+			}
+		}
+
+		if ((dhclient_request_options != 0) && (top_level_config.requested_options != default_requested_options)) {
+			for (ip = interfaces; ip; ip = ip -> next) {
+				if (ip->client->config->requested_options == default_requested_options)
+					ip->client->config->requested_options = top_level_config.requested_options;
+			}
+		}
+
+		free(arg_conf);
+		arg_conf = NULL;
+		arg_conf_len = 0;
+	}
+
 	/* Parse the lease database. */
 	read_client_leases ();
 
@@ -2105,7 +2365,8 @@ void make_discover (client, lease)
 	client -> packet.xid = random ();
 	client -> packet.secs = 0; /* filled in by send_discover. */
 
-	if (can_receive_unicast_unconfigured (client -> interface))
+	if ((!(bootp_broadcast_always || client->config->bootp_broadcast_always))
+	    && can_receive_unicast_unconfigured(client->interface))
 		client -> packet.flags = 0;
 	else
 		client -> packet.flags = htons (BOOTP_BROADCAST);
@@ -2189,7 +2450,9 @@ void make_request (client, lease)
 	} else {
 		memset (&client -> packet.ciaddr, 0,
 			sizeof client -> packet.ciaddr);
-		if (can_receive_unicast_unconfigured (client -> interface))
+		if ((!(bootp_broadcast_always ||
+		    client ->config->bootp_broadcast_always)) &&
+		    can_receive_unicast_unconfigured (client -> interface))
 			client -> packet.flags = 0;
 		else
 			client -> packet.flags = htons (BOOTP_BROADCAST);
@@ -2248,7 +2511,8 @@ void make_decline (client, lease)
 	client -> packet.hops = 0;
 	client -> packet.xid = client -> xid;
 	client -> packet.secs = 0; /* Filled in by send_request. */
-	if (can_receive_unicast_unconfigured (client -> interface))
+	if ((!(bootp_broadcast_always || client->config-> bootp_broadcast_always))
+	    && can_receive_unicast_unconfigured (client->interface))
 		client -> packet.flags = 0;
 	else
 		client -> packet.flags = htons (BOOTP_BROADCAST);
diff -up dhcp-4.0.0/client/clparse.c.options dhcp-4.0.0/client/clparse.c
--- dhcp-4.0.0/client/clparse.c.options	2007-12-08 09:36:00.000000000 -1000
+++ dhcp-4.0.0/client/clparse.c	2007-12-29 11:13:51.000000000 -1000
@@ -132,6 +132,7 @@ isc_result_t read_client_conf ()
 	/* Requested lease time, used by DHCPv6 (DHCPv4 uses the option cache)
 	 */
 	top_level_config.requested_lease = 7200;
+	top_level_config.bootp_broadcast_always = 0;
 
 	group_allocate (&top_level_config.on_receipt, MDL);
 	if (!top_level_config.on_receipt)
@@ -295,7 +296,8 @@ void read_client_leases ()
 	interface-declaration |
 	LEASE client-lease-statement |
 	ALIAS client-lease-statement |
-	KEY key-definition */
+	KEY key-definition |
+	BOOTP_BROADCAST_ALWAYS */
 
 void parse_client_statement (cfile, ip, config)
 	struct parse *cfile;
@@ -685,6 +687,12 @@ void parse_client_statement (cfile, ip, 
 		parse_reject_statement (cfile, config);
 		return;
 
+	      case BOOTP_BROADCAST_ALWAYS:
+		token = next_token(&val, (unsigned*)0, cfile);
+		config -> bootp_broadcast_always = 1;
+		parse_semi (cfile);
+		return;
+
 	      default:
 		lose = 0;
 		stmt = (struct executable_statement *)0;