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;
269 #if defined TIZEN_EXT
270 DBG("dhcp %p", dhcp);
271 DBG("dhcp->timeout %d", dhcp->timeout);
273 g_dhcp_client_start(dhcp->dhcp_client,
274 __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
279 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
281 struct connman_dhcp *dhcp = user_data;
284 DBG("No lease available ipv4ll %d client %p", dhcp->ipv4ll_running,
285 dhcp->ipv4ll_client);
287 #if defined TIZEN_EXT
288 if (connman_setting_get_bool("EnableAutoIp") == false) {
289 DBG("link-local address autoconfiguration is disabled.");
291 __connman_network_disconnect(dhcp->network);
295 if (dhcp->timeout > 0)
296 g_source_remove(dhcp->timeout);
298 dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
301 if (dhcp->ipv4ll_running)
304 err = ipv4ll_start_client(dhcp);
306 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
308 /* Only notify upper layer if we have a problem */
309 dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
312 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
314 struct connman_dhcp *dhcp = user_data;
318 /* Upper layer will decide what to do, e.g. nothing or retry. */
319 dhcp_invalidate(dhcp, true);
322 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
324 struct connman_dhcp *dhcp = user_data;
328 ipv4ll_stop_client(dhcp);
331 * Since we lost our IPv4LL configuration we might as notify
334 dhcp_invalidate(dhcp, true);
337 static bool compare_string_arrays(char **array_a, char **array_b)
341 if (!array_a || !array_b)
344 if (g_strv_length(array_a) != g_strv_length(array_b))
347 for (i = 0; array_a[i] &&
349 if (g_strcmp0(array_a[i], array_b[i]) != 0)
356 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
357 struct connman_dhcp *dhcp)
359 char **nameservers, **timeservers, *pac = NULL;
360 struct connman_service *service;
361 GList *list, *option = NULL;
368 service = connman_service_lookup_from_network(dhcp->network);
370 connman_error("Can not lookup service");
374 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
375 if (option && option->data) {
378 mtu = atoi(option->data);
380 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
381 index = __connman_ipconfig_get_index(dhcp->ipconfig);
382 err = connman_inet_set_mtu(index, mtu);
384 DBG("MTU %d index %d err %d", mtu, index, err);
388 option = g_dhcp_client_get_option(dhcp_client, 252);
390 pac = g_strdup(option->data);
392 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
393 ns_entries = g_list_length(option);
394 nameservers = g_try_new0(char *, ns_entries + 1);
396 for (i = 0, list = option;list; list = list->next, i++)
397 nameservers[i] = g_strdup(list->data);
398 nameservers[ns_entries] = NULL;
401 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
403 __connman_service_set_domainname(service, option->data);
405 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
407 __connman_service_set_hostname(service, option->data);
409 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
410 ns_entries = g_list_length(option);
411 timeservers = g_try_new0(char *, ns_entries + 1);
413 for (i = 0, list = option; list; list = list->next, i++)
414 timeservers[i] = g_strdup(list->data);
415 timeservers[ns_entries] = NULL;
418 if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
419 if (dhcp->nameservers) {
420 #if defined TIZEN_EXT
421 for (i = 0; dhcp->nameservers[i] != NULL; i++) {
422 __connman_service_nameserver_remove(service,
423 dhcp->nameservers[i], false,
424 CONNMAN_IPCONFIG_TYPE_IPV4);
427 for (i = 0; dhcp->nameservers[i]; i++) {
428 __connman_service_nameserver_remove(service,
429 dhcp->nameservers[i], false);
432 g_strfreev(dhcp->nameservers);
435 dhcp->nameservers = nameservers;
437 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
438 #if defined TIZEN_EXT
439 __connman_service_nameserver_append(service,
440 dhcp->nameservers[i], false,
441 CONNMAN_IPCONFIG_TYPE_IPV4);
443 __connman_service_nameserver_append(service,
444 dhcp->nameservers[i], false);
448 g_strfreev(nameservers);
451 if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
452 if (dhcp->timeservers) {
453 for (i = 0; dhcp->timeservers[i]; i++) {
454 __connman_service_timeserver_remove(service,
455 dhcp->timeservers[i]);
457 g_strfreev(dhcp->timeservers);
460 dhcp->timeservers = timeservers;
462 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
463 __connman_service_timeserver_append(service,
464 dhcp->timeservers[i]);
467 g_strfreev(timeservers);
470 if (g_strcmp0(pac, dhcp->pac) != 0) {
474 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
478 if (connman_setting_get_bool("Enable6to4"))
479 __connman_6to4_probe(service);
484 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
486 struct connman_dhcp *dhcp = user_data;
487 GList *option = NULL;
488 enum connman_ipconfig_method old_method;
489 char *address, *netmask = NULL, *gateway = NULL;
490 const char *c_address, *c_gateway;
491 unsigned char prefixlen, c_prefixlen;
492 bool ip_change = false;
494 DBG("Lease available");
496 if (dhcp->ipv4ll_client) {
497 ipv4ll_stop_client(dhcp);
498 dhcp_invalidate(dhcp, false);
501 c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
502 c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
503 c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
505 address = g_dhcp_client_get_address(dhcp_client);
507 __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
508 DBG("last address %s", address);
510 #if defined TIZEN_EXT
511 int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
514 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
516 netmask = g_strdup(option->data);
518 option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
520 gateway = g_strdup(option->data);
522 prefixlen = connman_ipaddress_calc_netmask_len(netmask);
523 if (prefixlen == 255)
524 connman_warn("netmask: %s is invalid", netmask);
526 DBG("c_address %s", c_address);
528 if (g_strcmp0(address, c_address)) {
531 /* Remove old ip address */
532 __connman_ipconfig_address_remove(dhcp->ipconfig);
535 if (g_strcmp0(gateway, c_gateway)) {
538 /* Remove gateway ip address */
539 __connman_ipconfig_gateway_remove(dhcp->ipconfig);
541 } else if (prefixlen != c_prefixlen)
544 old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
545 __connman_ipconfig_set_method(dhcp->ipconfig,
546 CONNMAN_IPCONFIG_METHOD_DHCP);
548 #if defined TIZEN_EXT
549 __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
553 * Notify IPv4.Configuration's method moved back to DHCP.
555 * This is the case ConnMan initially set an address by using
556 * IPv4LL because DHCP failed but now we got an address from DHCP.
558 if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
559 struct connman_service *service =
560 connman_service_lookup_from_network(dhcp->network);
563 __connman_service_notify_ipv4_configuration(service);
567 __connman_ipconfig_set_local(dhcp->ipconfig, address);
568 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
569 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
572 if (!apply_lease_available_on_network(dhcp_client, dhcp))
584 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
586 struct connman_dhcp *dhcp = user_data;
587 enum connman_ipconfig_method old_method;
588 char *address, *netmask;
589 unsigned char prefixlen;
591 DBG("IPV4LL available");
593 address = g_dhcp_client_get_address(ipv4ll_client);
594 netmask = g_dhcp_client_get_netmask(ipv4ll_client);
596 prefixlen = connman_ipaddress_calc_netmask_len(netmask);
598 old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
599 __connman_ipconfig_set_method(dhcp->ipconfig,
600 CONNMAN_IPCONFIG_METHOD_AUTO);
603 * Notify IPv4.Configuration's method is AUTO now.
605 * This is the case DHCP failed thus ConnMan used IPv4LL to get an
606 * address. Set IPv4.Configuration method to AUTO allows user to
607 * ask for a DHCP address by setting the method again to DHCP.
609 if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
610 struct connman_service *service =
611 connman_service_lookup_from_network(dhcp->network);
614 __connman_service_notify_ipv4_configuration(service);
617 __connman_ipconfig_set_local(dhcp->ipconfig, address);
618 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
619 __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
627 static int dhcp_initialize(struct connman_dhcp *dhcp)
629 GDHCPClient *dhcp_client;
630 GDHCPClientError error;
632 const char *vendor_class_id;
634 DBG("dhcp %p", dhcp);
636 index = __connman_ipconfig_get_index(dhcp->ipconfig);
638 dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
639 if (error != G_DHCP_CLIENT_ERROR_NONE)
640 #if defined TIZEN_EXT
642 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
645 #if defined TIZEN_EXT
649 #if !defined TIZEN_EXT
650 if (getenv("CONNMAN_DHCP_DEBUG")) {
652 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
654 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
655 dhcp->dhcp_debug_prefix);
656 #if !defined TIZEN_EXT
660 g_dhcp_client_set_id(dhcp_client);
663 struct connman_service *service;
664 const char *hostname;
666 service = connman_service_lookup_from_network(dhcp->network);
668 hostname = __connman_service_get_hostname(service);
670 hostname = connman_utsname_get_hostname();
673 g_dhcp_client_set_send(dhcp_client,
674 G_DHCP_HOST_NAME, hostname);
676 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
677 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
678 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
679 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
680 g_dhcp_client_set_request(dhcp_client, 252);
681 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
684 g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
685 g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
687 vendor_class_id = connman_option_get_string("VendorClassID");
689 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
692 g_dhcp_client_register_event(dhcp_client,
693 G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
694 lease_available_cb, dhcp);
696 g_dhcp_client_register_event(dhcp_client,
697 G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
699 g_dhcp_client_register_event(dhcp_client,
700 G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
702 dhcp->dhcp_client = dhcp_client;
707 static int dhcp_release(struct connman_dhcp *dhcp)
709 DBG("dhcp %p", dhcp);
711 if (dhcp->timeout > 0) {
712 g_source_remove(dhcp->timeout);
716 if (dhcp->dhcp_client) {
717 g_dhcp_client_stop(dhcp->dhcp_client);
718 g_dhcp_client_unref(dhcp->dhcp_client);
721 dhcp->dhcp_client = NULL;
723 g_free(dhcp->dhcp_debug_prefix);
724 dhcp->dhcp_debug_prefix = NULL;
726 ipv4ll_stop_client(dhcp);
731 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
733 struct connman_dhcp *dhcp;
735 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
739 return g_dhcp_client_get_server_address(dhcp->dhcp_client);
742 #if defined TIZEN_EXT_WIFI_MESH
743 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
744 dhcp_cb callback, gpointer user_data)
746 struct connman_dhcp *dhcp;
751 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
754 dhcp = g_try_new0(struct connman_dhcp, 1);
758 dhcp->ipconfig = ipconfig;
759 __connman_ipconfig_ref(ipconfig);
761 err = dhcp_initialize(dhcp);
768 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
771 dhcp->callback = callback;
772 dhcp->user_data = user_data;
773 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
777 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
778 struct connman_network *network, dhcp_cb callback,
781 #if !defined TIZEN_EXT
782 const char *last_addr = NULL;
784 struct connman_dhcp *dhcp;
790 struct connman_service *service;
792 service = connman_service_lookup_from_network(network);
797 #if !defined TIZEN_EXT
798 last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
801 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
804 dhcp = g_try_new0(struct connman_dhcp, 1);
808 dhcp->ipconfig = ipconfig;
809 __connman_ipconfig_ref(ipconfig);
812 dhcp->network = network;
813 connman_network_ref(network);
816 err = dhcp_initialize(dhcp);
820 connman_network_unref(network);
825 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
828 dhcp->callback = callback;
829 dhcp->user_data = user_data;
831 #if defined TIZEN_EXT
832 DBG("Start DHCP with DHCPDISCOVER request");
834 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
836 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
840 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
842 struct connman_dhcp *dhcp;
844 DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
849 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
851 g_hash_table_remove(ipconfig_table, ipconfig);
852 __connman_ipconfig_unref(ipconfig);
854 connman_network_unref(dhcp->network);
856 dhcp_invalidate(dhcp, false);
861 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
863 struct connman_dhcp *dhcp;
867 DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
872 dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
874 address = __connman_ipconfig_get_local(ipconfig);
878 if (inet_pton(AF_INET, address, &addr) != 1)
879 connman_error("Could not convert address %s", address);
881 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
885 int __connman_dhcp_init(void)
889 ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
895 void __connman_dhcp_cleanup(void)
899 g_hash_table_destroy(ipconfig_table);
900 ipconfig_table = NULL;