5 * Copyright (C) 2007-2013 Intel Corporation. All rights reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 #include <net/ethernet.h>
32 #define IPV6_MIN_MTU 1280
35 #include <connman/ipconfig.h>
36 #include <include/setting.h>
38 #include <gdhcp/gdhcp.h>
44 #define RATE_LIMIT_INTERVAL 60 /* delay between successive attempts */
47 struct connman_ipconfig *ipconfig;
48 struct connman_network *network;
58 GDHCPClient *ipv4ll_client;
59 GDHCPClient *dhcp_client;
60 char *ipv4ll_debug_prefix;
61 char *dhcp_debug_prefix;
66 static GHashTable *ipconfig_table;
68 static void dhcp_free(struct connman_dhcp *dhcp)
71 DBG("dhcp_free [%p]", dhcp);
73 g_strfreev(dhcp->nameservers);
74 g_strfreev(dhcp->timeservers);
77 dhcp->nameservers = NULL;
78 dhcp->timeservers = NULL;
87 static void ipv4ll_stop_client(struct connman_dhcp *dhcp)
90 DBG("dhcp [%p] ipv4ll_client [%p]", dhcp, dhcp->ipv4ll_client);
92 if (!dhcp->ipv4ll_client)
95 g_dhcp_client_stop(dhcp->ipv4ll_client);
96 g_dhcp_client_unref(dhcp->ipv4ll_client);
97 dhcp->ipv4ll_client = NULL;
98 dhcp->ipv4ll_running = false;
100 g_free(dhcp->ipv4ll_debug_prefix);
101 dhcp->ipv4ll_debug_prefix = NULL;
104 static bool apply_dhcp_invalidate_on_network(struct connman_dhcp *dhcp)
106 struct connman_service *service;
112 service = connman_service_lookup_from_network(dhcp->network);
114 connman_error("Can not lookup service");
118 __connman_service_set_domainname(service, NULL);
119 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig, NULL);
121 if (dhcp->timeservers) {
122 for (i = 0; dhcp->timeservers[i]; i++) {
123 __connman_service_timeserver_remove(service,
124 dhcp->timeservers[i]);
126 g_strfreev(dhcp->timeservers);
127 dhcp->timeservers = NULL;
129 if (dhcp->nameservers) {
130 for (i = 0; dhcp->nameservers[i]; i++) {
131 #if defined TIZEN_EXT
132 __connman_service_nameserver_remove(service,
133 dhcp->nameservers[i], false,
134 CONNMAN_IPCONFIG_TYPE_IPV4);
136 __connman_service_nameserver_remove(service,
137 dhcp->nameservers[i], false);
140 g_strfreev(dhcp->nameservers);
141 dhcp->nameservers = NULL;
148 * dhcp_invalidate: Invalidate an existing DHCP lease
149 * @dhcp: pointer to the DHCP lease to invalidate.
150 * @callback: flag indicating whether or not to invoke the client callback
153 * Invalidates an existing DHCP lease, optionally invoking the client
154 * callback. The caller may wish to avoid the client callback invocation
155 * when the invocation of that callback might otherwise unnecessarily upset
156 * service state due to the IP configuration change implied by this
159 static void dhcp_invalidate(struct connman_dhcp *dhcp, bool callback)
161 DBG("dhcp %p callback %u", dhcp, callback);
166 __connman_6to4_remove(dhcp->ipconfig);
168 if (!apply_dhcp_invalidate_on_network(dhcp))
171 __connman_ipconfig_set_dhcp_address(dhcp->ipconfig,
172 __connman_ipconfig_get_local(dhcp->ipconfig));
173 DBG("last address %s",
174 __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
176 __connman_ipconfig_address_remove(dhcp->ipconfig);
178 __connman_ipconfig_set_local(dhcp->ipconfig, NULL);
179 __connman_ipconfig_set_broadcast(dhcp->ipconfig, NULL);
180 __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
181 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, 0);
183 if (dhcp->callback && callback)
184 dhcp->callback(dhcp->ipconfig, dhcp->network,
185 false, dhcp->user_data);
188 static void dhcp_valid(struct connman_dhcp *dhcp)
191 dhcp->callback(dhcp->ipconfig, dhcp->network,
192 true, dhcp->user_data);
195 static void dhcp_debug(const char *str, void *data)
197 connman_info("%s: %s", (const char *) data, str);
200 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data);
201 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data);
203 static int ipv4ll_start_client(struct connman_dhcp *dhcp)
205 GDHCPClient *ipv4ll_client;
206 GDHCPClientError error;
207 const char *hostname;
211 #if defined TIZEN_EXT
212 DBG("dhcp %p", dhcp);
215 if (dhcp->ipv4ll_client)
218 index = __connman_ipconfig_get_index(dhcp->ipconfig);
220 ipv4ll_client = g_dhcp_client_new(G_DHCP_IPV4LL, index, &error);
221 if (error != G_DHCP_CLIENT_ERROR_NONE)
224 #if !defined TIZEN_EXT
225 if (getenv("CONNMAN_DHCP_DEBUG")) {
227 dhcp->ipv4ll_debug_prefix = g_strdup_printf("IPv4LL index %d",
229 g_dhcp_client_set_debug(ipv4ll_client, dhcp_debug,
230 dhcp->ipv4ll_debug_prefix);
231 #if !defined TIZEN_EXT
235 g_dhcp_client_set_id(ipv4ll_client);
238 hostname = connman_utsname_get_hostname();
240 g_dhcp_client_set_send(ipv4ll_client,
241 G_DHCP_HOST_NAME, hostname);
244 g_dhcp_client_register_event(ipv4ll_client,
245 G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp);
247 g_dhcp_client_register_event(ipv4ll_client,
248 G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
249 ipv4ll_available_cb, dhcp);
251 dhcp->ipv4ll_client = ipv4ll_client;
253 err = g_dhcp_client_start(dhcp->ipv4ll_client, NULL);
255 ipv4ll_stop_client(dhcp);
259 dhcp->ipv4ll_running = true;
263 static gboolean dhcp_retry_cb(gpointer user_data)
265 struct connman_dhcp *dhcp = user_data;
268 #if defined TIZEN_EXT
269 DBG("dhcp %p", dhcp);
270 DBG("dhcp->timeout %d", dhcp->timeout);
272 g_dhcp_client_start(dhcp->dhcp_client,
273 __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
278 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
280 struct connman_dhcp *dhcp = user_data;
283 DBG("No lease available ipv4ll %d client %p", dhcp->ipv4ll_running,
284 dhcp->ipv4ll_client);
286 if (dhcp->timeout > 0)
287 g_source_remove(dhcp->timeout);
289 dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
292 if (dhcp->ipv4ll_running)
295 err = ipv4ll_start_client(dhcp);
297 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
299 /* Only notify upper layer if we have a problem */
300 dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
303 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
305 struct connman_dhcp *dhcp = user_data;
309 /* Upper layer will decide what to do, e.g. nothing or retry. */
310 dhcp_invalidate(dhcp, true);
313 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
315 struct connman_dhcp *dhcp = user_data;
319 ipv4ll_stop_client(dhcp);
322 * Since we lost our IPv4LL configuration we might as notify
325 dhcp_invalidate(dhcp, true);
328 static bool compare_string_arrays(char **array_a, char **array_b)
332 if (!array_a || !array_b)
335 if (g_strv_length(array_a) != g_strv_length(array_b))
338 for (i = 0; array_a[i] &&
340 if (g_strcmp0(array_a[i], array_b[i]) != 0)
347 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
348 struct connman_dhcp *dhcp)
350 char **nameservers, **timeservers, *pac = NULL;
351 struct connman_service *service;
352 GList *list, *option = NULL;
359 service = connman_service_lookup_from_network(dhcp->network);
361 connman_error("Can not lookup service");
365 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
366 if (option && option->data) {
369 mtu = atoi(option->data);
371 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
372 index = __connman_ipconfig_get_index(dhcp->ipconfig);
373 err = connman_inet_set_mtu(index, mtu);
375 DBG("MTU %d index %d err %d", mtu, index, err);
379 option = g_dhcp_client_get_option(dhcp_client, 252);
381 pac = g_strdup(option->data);
383 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
384 ns_entries = g_list_length(option);
385 nameservers = g_try_new0(char *, ns_entries + 1);
387 for (i = 0, list = option;list; list = list->next, i++)
388 nameservers[i] = g_strdup(list->data);
389 nameservers[ns_entries] = NULL;
392 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
394 __connman_service_set_domainname(service, option->data);
396 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
398 __connman_service_set_hostname(service, option->data);
400 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
401 ns_entries = g_list_length(option);
402 timeservers = g_try_new0(char *, ns_entries + 1);
404 for (i = 0, list = option; list; list = list->next, i++)
405 timeservers[i] = g_strdup(list->data);
406 timeservers[ns_entries] = NULL;
409 if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
410 if (dhcp->nameservers) {
411 #if defined TIZEN_EXT
412 for (i = 0; dhcp->nameservers[i] != NULL; i++) {
413 __connman_service_nameserver_remove(service,
414 dhcp->nameservers[i], false,
415 CONNMAN_IPCONFIG_TYPE_IPV4);
418 for (i = 0; dhcp->nameservers[i]; i++) {
419 __connman_service_nameserver_remove(service,
420 dhcp->nameservers[i], false);
423 g_strfreev(dhcp->nameservers);
426 dhcp->nameservers = nameservers;
428 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
429 #if defined TIZEN_EXT
430 __connman_service_nameserver_append(service,
431 dhcp->nameservers[i], false,
432 CONNMAN_IPCONFIG_TYPE_IPV4);
434 __connman_service_nameserver_append(service,
435 dhcp->nameservers[i], false);
439 g_strfreev(nameservers);
442 if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
443 if (dhcp->timeservers) {
444 for (i = 0; dhcp->timeservers[i]; i++) {
445 __connman_service_timeserver_remove(service,
446 dhcp->timeservers[i]);
448 g_strfreev(dhcp->timeservers);
451 dhcp->timeservers = timeservers;
453 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
454 __connman_service_timeserver_append(service,
455 dhcp->timeservers[i]);
458 g_strfreev(timeservers);
461 if (g_strcmp0(pac, dhcp->pac) != 0) {
465 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
469 if (connman_setting_get_bool("Enable6to4"))
470 __connman_6to4_probe(service);
475 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
477 struct connman_dhcp *dhcp = user_data;
478 GList *option = NULL;
479 enum connman_ipconfig_method old_method;
480 char *address, *netmask = NULL, *gateway = NULL;
481 const char *c_address, *c_gateway;
482 unsigned char prefixlen, c_prefixlen;
483 bool ip_change = false;
485 DBG("Lease available");
487 if (dhcp->ipv4ll_client) {
488 ipv4ll_stop_client(dhcp);
489 dhcp_invalidate(dhcp, false);
492 c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
493 c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
494 c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
496 address = g_dhcp_client_get_address(dhcp_client);
498 __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
499 DBG("last address %s", address);
501 #if defined TIZEN_EXT
502 int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
505 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
507 netmask = g_strdup(option->data);
509 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
511 gateway = g_strdup(option->data);
513 prefixlen = connman_ipaddress_calc_netmask_len(netmask);
514 if (prefixlen == 255)
515 connman_warn("netmask: %s is invalid", netmask);
517 DBG("c_address %s", c_address);
519 if (g_strcmp0(address, c_address)) {
522 /* Remove old ip address */
523 __connman_ipconfig_address_remove(dhcp->ipconfig);
526 if (g_strcmp0(gateway, c_gateway)) {
529 /* Remove gateway ip address */
530 __connman_ipconfig_gateway_remove(dhcp->ipconfig);
532 } else if (prefixlen != c_prefixlen)
535 old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
536 __connman_ipconfig_set_method(dhcp->ipconfig,
537 CONNMAN_IPCONFIG_METHOD_DHCP);
539 #if defined TIZEN_EXT
540 __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
544 * Notify IPv4.Configuration's method moved back to DHCP.
546 * This is the case ConnMan initially set an address by using
547 * IPv4LL because DHCP failed but now we got an address from DHCP.
549 if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
550 struct connman_service *service =
551 connman_service_lookup_from_network(dhcp->network);
554 __connman_service_notify_ipv4_configuration(service);
558 __connman_ipconfig_set_local(dhcp->ipconfig, address);
559 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
560 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
563 if (!apply_lease_available_on_network(dhcp_client, dhcp))
575 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
577 struct connman_dhcp *dhcp = user_data;
578 enum connman_ipconfig_method old_method;
579 char *address, *netmask;
580 unsigned char prefixlen;
582 DBG("IPV4LL available");
584 address = g_dhcp_client_get_address(ipv4ll_client);
585 netmask = g_dhcp_client_get_netmask(ipv4ll_client);
587 prefixlen = connman_ipaddress_calc_netmask_len(netmask);
589 old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
590 __connman_ipconfig_set_method(dhcp->ipconfig,
591 CONNMAN_IPCONFIG_METHOD_AUTO);
594 * Notify IPv4.Configuration's method is AUTO now.
596 * This is the case DHCP failed thus ConnMan used IPv4LL to get an
597 * address. Set IPv4.Configuration method to AUTO allows user to
598 * ask for a DHCP address by setting the method again to DHCP.
600 if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
601 struct connman_service *service =
602 connman_service_lookup_from_network(dhcp->network);
605 __connman_service_notify_ipv4_configuration(service);
608 __connman_ipconfig_set_local(dhcp->ipconfig, address);
609 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
610 __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
618 static int dhcp_initialize(struct connman_dhcp *dhcp)
620 GDHCPClient *dhcp_client;
621 GDHCPClientError error;
623 const char *vendor_class_id;
625 DBG("dhcp %p", dhcp);
627 index = __connman_ipconfig_get_index(dhcp->ipconfig);
629 dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
630 if (error != G_DHCP_CLIENT_ERROR_NONE)
631 #if defined TIZEN_EXT
633 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
636 #if defined TIZEN_EXT
640 #if !defined TIZEN_EXT
641 if (getenv("CONNMAN_DHCP_DEBUG")) {
643 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
645 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
646 dhcp->dhcp_debug_prefix);
647 #if !defined TIZEN_EXT
651 g_dhcp_client_set_id(dhcp_client);
654 struct connman_service *service;
655 const char *hostname;
657 service = connman_service_lookup_from_network(dhcp->network);
659 hostname = __connman_service_get_hostname(service);
661 hostname = connman_utsname_get_hostname();
664 g_dhcp_client_set_send(dhcp_client,
665 G_DHCP_HOST_NAME, hostname);
667 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
668 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
669 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
670 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
671 g_dhcp_client_set_request(dhcp_client, 252);
672 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
675 g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
676 g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
678 vendor_class_id = connman_option_get_string("VendorClassID");
680 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
683 g_dhcp_client_register_event(dhcp_client,
684 G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
685 lease_available_cb, dhcp);
687 g_dhcp_client_register_event(dhcp_client,
688 G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
690 g_dhcp_client_register_event(dhcp_client,
691 G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
693 dhcp->dhcp_client = dhcp_client;
698 static int dhcp_release(struct connman_dhcp *dhcp)
700 DBG("dhcp %p", dhcp);
702 if (dhcp->timeout > 0) {
703 g_source_remove(dhcp->timeout);
707 if (dhcp->dhcp_client) {
708 g_dhcp_client_stop(dhcp->dhcp_client);
709 g_dhcp_client_unref(dhcp->dhcp_client);
712 dhcp->dhcp_client = NULL;
714 g_free(dhcp->dhcp_debug_prefix);
715 dhcp->dhcp_debug_prefix = NULL;
717 ipv4ll_stop_client(dhcp);
722 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
724 struct connman_dhcp *dhcp;
726 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
730 return g_dhcp_client_get_server_address(dhcp->dhcp_client);
733 #if defined TIZEN_EXT_WIFI_MESH
734 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
735 dhcp_cb callback, gpointer user_data)
737 struct connman_dhcp *dhcp;
742 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
745 dhcp = g_try_new0(struct connman_dhcp, 1);
749 dhcp->ipconfig = ipconfig;
750 __connman_ipconfig_ref(ipconfig);
752 err = dhcp_initialize(dhcp);
759 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
762 dhcp->callback = callback;
763 dhcp->user_data = user_data;
764 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
768 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
769 struct connman_network *network, dhcp_cb callback,
772 #if !defined TIZEN_EXT
773 const char *last_addr = NULL;
775 struct connman_dhcp *dhcp;
781 struct connman_service *service;
783 service = connman_service_lookup_from_network(network);
788 #if !defined TIZEN_EXT
789 last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
792 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
795 dhcp = g_try_new0(struct connman_dhcp, 1);
799 dhcp->ipconfig = ipconfig;
800 __connman_ipconfig_ref(ipconfig);
803 dhcp->network = network;
804 connman_network_ref(network);
807 err = dhcp_initialize(dhcp);
811 connman_network_unref(network);
816 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
819 dhcp->callback = callback;
820 dhcp->user_data = user_data;
822 #if defined TIZEN_EXT
823 DBG("Start DHCP with DHCPDISCOVER request");
825 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
827 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
831 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
833 struct connman_dhcp *dhcp;
835 DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
840 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
842 g_hash_table_remove(ipconfig_table, ipconfig);
843 __connman_ipconfig_unref(ipconfig);
845 connman_network_unref(dhcp->network);
847 dhcp_invalidate(dhcp, false);
852 int __connman_dhcp_init(void)
856 ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
862 void __connman_dhcp_cleanup(void)
866 g_hash_table_destroy(ipconfig_table);
867 ipconfig_table = NULL;
869 dhcp_cleanup_random();