--- /dev/null
+diff -up dhcp-4.2.2b1/client/clparse.c.options dhcp-4.2.2b1/client/clparse.c
+--- dhcp-4.2.2b1/client/clparse.c.options 2011-04-21 16:08:14.000000000 +0200
++++ dhcp-4.2.2b1/client/clparse.c 2011-07-01 13:51:52.935755570 +0200
+@@ -146,6 +146,7 @@ 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)
+@@ -313,7 +314,8 @@ 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;
+@@ -732,6 +734,12 @@ 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;
+diff -up dhcp-4.2.2b1/client/dhclient.c.options dhcp-4.2.2b1/client/dhclient.c
+--- dhcp-4.2.2b1/client/dhclient.c.options 2011-05-11 16:20:59.000000000 +0200
++++ dhcp-4.2.2b1/client/dhclient.c 2011-07-01 13:51:52.936755545 +0200
+@@ -39,6 +39,12 @@
+ #include <limits.h>
+ #include <dns/result.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... */
+
+@@ -87,6 +93,9 @@ int wanted_ia_na = -1; /* the absolute
+ int wanted_ia_ta = 0;
+ int wanted_ia_pd = 0;
+ char *mockup_relay = NULL;
++int bootp_broadcast_always = 0;
++
++extern u_int32_t default_requested_options[];
+
+ void run_stateless(int exit_mode);
+
+@@ -123,6 +132,15 @@ main(int argc, char **argv) {
+ int local_family_set = 0;
+ #endif /* DHCPv6 */
+ 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));
+@@ -310,6 +328,88 @@ 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();
++ exit(1);
++ }
++
++ 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();
++ exit(1);
++ }
++
++ 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();
++ exit(1);
++ }
++
++ 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], "-timeout")) {
++ if ((++i == argc) || (argv[i] == NULL) || (*(argv[i])=='\0')) {
++ usage();
++ exit(1);
++ }
++
++ 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();
++ exit(1);
++ }
++
++ 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();
++ exit(1);
++ }
++
++ dhclient_request_options = argv[i];
+ } else if (argv[i][0] == '-') {
+ usage();
+ } else if (interfaces_requested < 0) {
+@@ -484,6 +584,166 @@ 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 -timeout 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 -timeout 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/-timeout/-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/-timeout/-V/-R configuration arguments", 0);
++
++ if ((status != ISC_R_SUCCESS) || (cfile -> warnings_occurred))
++ log_fatal("Cannot parse -I/-H/-F/-timeout/-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/-timeout/-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();
+
+@@ -2397,7 +2657,8 @@ 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);
+@@ -2481,7 +2742,9 @@ 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);
+@@ -2543,7 +2806,8 @@ 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-4.2.2b1/common/conflex.c.options dhcp-4.2.2b1/common/conflex.c
+--- dhcp-4.2.2b1/common/conflex.c.options 2011-05-11 16:20:59.000000000 +0200
++++ dhcp-4.2.2b1/common/conflex.c 2011-07-01 13:51:52.938755494 +0200
+@@ -808,6 +808,8 @@ 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-4.2.2b1/includes/dhcpd.h.options dhcp-4.2.2b1/includes/dhcpd.h
+--- dhcp-4.2.2b1/includes/dhcpd.h.options 2011-05-20 16:21:11.000000000 +0200
++++ dhcp-4.2.2b1/includes/dhcpd.h 2011-07-01 13:51:52.940755442 +0200
+@@ -1147,6 +1147,9 @@ 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-4.2.2b1/includes/dhctoken.h.options dhcp-4.2.2b1/includes/dhctoken.h
+--- dhcp-4.2.2b1/includes/dhctoken.h.options 2011-05-12 14:02:47.000000000 +0200
++++ dhcp-4.2.2b1/includes/dhctoken.h 2011-07-01 13:53:43.316861637 +0200
+@@ -361,7 +361,8 @@ enum dhcp_token {
+ GETHOSTNAME = 662,
+ REWIND = 663,
+ INITIAL_DELAY = 664,
+- GETHOSTBYNAME = 665
++ GETHOSTBYNAME = 665,
++ BOOTP_BROADCAST_ALWAYS = 666
+ };
+
+ #define is_identifier(x) ((x) >= FIRST_TOKEN && \
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