5 /*-
6  * SPDX-License-Identifier: BSD-3-Clause
50 static struct interface_info *dummy_interfaces;
52 static char client_script_name[] = "/sbin/dhclient-script";
55  * client-conf-file :== client-declarations EOF
56  * client-declarations :== <nil>
57  *			 | client-declaration
58  *			 | client-declarations client-declaration
121 	 * have per-interface configuration declarations.  in read_client_conf()
124 	if (!ifi->client) {  in read_client_conf()
125 		ifi->client = malloc(sizeof(struct client_state));  in read_client_conf()
126 		if (!ifi->client)  in read_client_conf()
128 		memset(ifi->client, 0, sizeof(*(ifi->client)));  in read_client_conf()
130 	if (!ifi->client->config) {  in read_client_conf()
138 		ifi->client->config = config;  in read_client_conf()
145  * lease-file :== client-lease-statements EOF
146  * client-lease-statements :== <nil>
147  *		     | client-lease-statements LEASE client-lease-statement
158 	/* Open the lease file.   If we can't open it, just return -  in read_client_leases()
167 			warning("Corrupt lease file - possible data loss!");  in read_client_leases()
178  * client-declaration :==
179  *	SEND option-decl |
180  *	DEFAULT option-decl |
181  *	SUPERSEDE option-decl |
182  *	PREPEND option-decl |
183  *	APPEND option-decl |
184  *	hardware-declaration |
185  *	REQUEST option-list |
186  *	REQUIRE option-list |
187  *	IGNORE option-list |
193  *	interface-declaration |
194  *	LEASE client-lease-statement |
195  *	ALIAS client-lease-statement
207 		parse_option_decl(cfile, &config->send_options[0]);  in parse_client_statement()
210 		option = parse_option_decl(cfile, &config->defaults[0]);  in parse_client_statement()
212 			config->default_actions[option->code] = ACTION_DEFAULT;  in parse_client_statement()
215 		option = parse_option_decl(cfile, &config->defaults[0]);  in parse_client_statement()
217 			config->default_actions[option->code] =  in parse_client_statement()
221 		option = parse_option_decl(cfile, &config->defaults[0]);  in parse_client_statement()
223 			config->default_actions[option->code] = ACTION_APPEND;  in parse_client_statement()
226 		option = parse_option_decl(cfile, &config->defaults[0]);  in parse_client_statement()
228 			config->default_actions[option->code] = ACTION_PREPEND;  in parse_client_statement()
231 		parse_string_list(cfile, &config->media, 1);  in parse_client_statement()
235 			parse_hardware_param(cfile, &ip->hw_address);  in parse_client_statement()
243 		config->requested_option_count =  in parse_client_statement()
244 			parse_option_list(cfile, config->requested_options);  in parse_client_statement()
247 		memset(config->required_options, 0,  in parse_client_statement()
248 		    sizeof(config->required_options));  in parse_client_statement()
249 		parse_option_list(cfile, config->required_options);  in parse_client_statement()
252 		parse_option_list(cfile, config->ignored_options);  in parse_client_statement()
255 		parse_lease_time(cfile, &config->timeout);  in parse_client_statement()
258 		parse_lease_time(cfile, &config->retry_interval);  in parse_client_statement()
261 		parse_lease_time(cfile, &config->select_interval);  in parse_client_statement()
264 		parse_lease_time(cfile, &config->reboot_timeout);  in parse_client_statement()
268 		config->vlan_pcp = (u_int)tmp;  in parse_client_statement()
271 		parse_lease_time(cfile, &config->backoff_cutoff);  in parse_client_statement()
274 		parse_lease_time(cfile, &config->initial_interval);  in parse_client_statement()
277 		config->script_name = parse_string(cfile);  in parse_client_statement()
347  * option-list :== option_name |
382 	if (token != SEMI) {  in parse_option_list()
391  * interface-declaration :==
392  *	INTERFACE string LBRACE client-declarations RBRACE
410 	if (!ip->client)  in parse_interface_declaration()
413 	if (!ip->client->config)  in parse_interface_declaration()
431 		parse_client_statement(cfile, ip, ip->client->config);  in parse_interface_declaration()
442 	if (!strcmp(ifi->name, name))  in interface_or_dummy()
446 	for (ip = dummy_interfaces; ip; ip = ip->next)  in interface_or_dummy()
447 		if (!strcmp(ip->name, name))  in interface_or_dummy()
458 	strlcpy(ip->name, name, IFNAMSIZ);  in interface_or_dummy()
459 	ip->next = dummy_interfaces;  in interface_or_dummy()
467 	ip->client = malloc(sizeof(*(ip->client)));  in make_client_state()
468 	if (!ip->client)  in make_client_state()
469 		error("no memory for state on %s", ip->name);  in make_client_state()
470 	memset(ip->client, 0, sizeof(*(ip->client)));  in make_client_state()
476 	ip->client->config = malloc(sizeof(struct client_config));  in make_client_config()
477 	if (!ip->client->config)  in make_client_config()
478 		error("no memory for config for %s", ip->name);  in make_client_config()
479 	memset(ip->client->config, 0, sizeof(*(ip->client->config)));  in make_client_config()
480 	memcpy(ip->client->config, config, sizeof(*config));  in make_client_config()
484  * client-lease-statement :==
485  *	RBRACE client-lease-declarations LBRACE
487  *	client-lease-declarations :==
489  *		client-lease-declaration |
490  *		client-lease-declarations client-lease-declaration
511 	lease->is_static = is_static;  in parse_client_lease_statement()
537 	if (!ip->client)  in parse_client_lease_statement()
542 		ip->client->alias = lease;  in parse_client_lease_statement()
553 	for (lp = ip->client->leases; lp; lp = lp->next) {  in parse_client_lease_statement()
554 		if (lp->address.len == lease->address.len &&  in parse_client_lease_statement()
555 		    !memcmp(lp->address.iabuf, lease->address.iabuf,  in parse_client_lease_statement()
556 		    lease->address.len)) {  in parse_client_lease_statement()
558 				pl->next = lp->next;  in parse_client_lease_statement()
560 				ip->client->leases = lp->next;  in parse_client_lease_statement()
568 	 * recorded leases - don't make it the active lease.  in parse_client_lease_statement()
571 		lease->next = ip->client->leases;  in parse_client_lease_statement()
572 		ip->client->leases = lease;  in parse_client_lease_statement()
590 	if (ip->client->active) {  in parse_client_lease_statement()
591 		if (ip->client->active->expiry < cur_time)  in parse_client_lease_statement()
592 			free_client_lease(ip->client->active);  in parse_client_lease_statement()
593 		else if (ip->client->active->address.len ==  in parse_client_lease_statement()
594 		    lease->address.len &&  in parse_client_lease_statement()
595 		    !memcmp(ip->client->active->address.iabuf,  in parse_client_lease_statement()
596 		    lease->address.iabuf, lease->address.len))  in parse_client_lease_statement()
597 			free_client_lease(ip->client->active);  in parse_client_lease_statement()
599 			ip->client->active->next = ip->client->leases;  in parse_client_lease_statement()
600 			ip->client->leases = ip->client->active;  in parse_client_lease_statement()
603 	ip->client->active = lease;  in parse_client_lease_statement()
609  * client-lease-declaration :==
615  *	OPTION option-decl |
616  *	RENEW time-decl |
617  *	REBIND time-decl |
618  *	EXPIRE time-decl
630 		lease->is_bootp = 1;  in parse_client_lease_declaration()
643 		if (!parse_ip_addr(cfile, &lease->address))  in parse_client_lease_declaration()
647 		parse_string_list(cfile, &lease->medium, 0);  in parse_client_lease_declaration()
650 		lease->filename = parse_string(cfile);  in parse_client_lease_declaration()
653 		if (!parse_ip_addr(cfile, &lease->nextserver))  in parse_client_lease_declaration()
657 		lease->server_name = parse_string(cfile);  in parse_client_lease_declaration()
660 		lease->renewal = parse_date(cfile);  in parse_client_lease_declaration()
663 		lease->rebind = parse_date(cfile);  in parse_client_lease_declaration()
666 		lease->expiry = parse_date(cfile);  in parse_client_lease_declaration()
669 		parse_option_decl(cfile, lease->options);  in parse_client_lease_declaration()
677 	if (token != SEMI) {  in parse_client_lease_declaration()
703 		if (token != SEMI)  in parse_option_decl()
719 			if (token != SEMI)  in parse_option_decl()
745 	option = (struct option *)hash_lookup(universe->hash,  in parse_option_decl()
765 		for (fmt = option->format; *fmt; fmt++) {  in parse_option_decl()
771 				    sizeof(hunkbuf) - hunkix);  in parse_option_decl()
807 			case 'L':	/* Unsigned 32-bit integer... */  in parse_option_decl()
808 			case 'l':	/* Signed 32-bit integer... */  in parse_option_decl()
813 					if (token != SEMI)  in parse_option_decl()
821 			case 's':	/* Signed 16-bit integer. */  in parse_option_decl()
822 			case 'S':	/* Unsigned 16-bit integer. */  in parse_option_decl()
830 			case 'b':	/* Signed 8-bit integer. */  in parse_option_decl()
831 			case 'B':	/* Unsigned 8-bit integer. */  in parse_option_decl()
844 					if (token != SEMI)  in parse_option_decl()
871 	if (token != SEMI) {  in parse_option_decl()
877 	options[option->code].data = malloc(hunkix + nul_term);  in parse_option_decl()
878 	if (!options[option->code].data)  in parse_option_decl()
880 	memcpy(options[option->code].data, hunkbuf, hunkix + nul_term);  in parse_option_decl()
881 	options[option->code].len = hunkix;  in parse_option_decl()
895 		for (cur = *lp; cur->next; cur = cur->next)  in parse_string_list()
912 		memcpy(tmp->string, val, valsize);  in parse_string_list()
913 		tmp->next = NULL;  in parse_string_list()
917 			cur->next = tmp;  in parse_string_list()
925 	if (token != SEMI) {  in parse_string_list()
950 		list->addr = addr;  in parse_reject_statement()
951 		list->next = config->reject_list;  in parse_reject_statement()
952 		config->reject_list = list;  in parse_reject_statement()
957 	if (token != SEMI) {  in parse_reject_statement()