| /* |
| * |
| * Connection Manager |
| * |
| * Copyright (C) 2007-2012 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| #include <stdio.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <stdlib.h> |
| |
| #include <connman/ipconfig.h> |
| #include <include/setting.h> |
| |
| #include <gdhcp/gdhcp.h> |
| |
| #include <glib.h> |
| |
| #include "connman.h" |
| |
| struct connman_dhcp { |
| struct connman_network *network; |
| dhcp_cb callback; |
| |
| char **nameservers; |
| char **timeservers; |
| char *pac; |
| |
| GDHCPClient *dhcp_client; |
| }; |
| |
| static GHashTable *network_table; |
| |
| static void dhcp_free(struct connman_dhcp *dhcp) |
| { |
| g_strfreev(dhcp->nameservers); |
| g_strfreev(dhcp->timeservers); |
| g_free(dhcp->pac); |
| |
| dhcp->nameservers = NULL; |
| dhcp->timeservers = NULL; |
| dhcp->pac = NULL; |
| } |
| |
| /** |
| * dhcp_invalidate: Invalidate an existing DHCP lease |
| * @dhcp: pointer to the DHCP lease to invalidate. |
| * @callback: flag indicating whether or not to invoke the client callback |
| * if present. |
| * |
| * Invalidates an existing DHCP lease, optionally invoking the client |
| * callback. The caller may wish to avoid the client callback invocation |
| * when the invocation of that callback might otherwise unnecessarily upset |
| * service state due to the IP configuration change implied by this |
| * invalidation. |
| */ |
| static void dhcp_invalidate(struct connman_dhcp *dhcp, connman_bool_t callback) |
| { |
| struct connman_service *service; |
| struct connman_ipconfig *ipconfig; |
| int i; |
| |
| DBG("dhcp %p callback %u", dhcp, callback); |
| |
| if (dhcp == NULL) |
| return; |
| |
| service = connman_service_lookup_from_network(dhcp->network); |
| if (service == NULL) |
| goto out; |
| |
| ipconfig = __connman_service_get_ip4config(service); |
| if (ipconfig == NULL) |
| goto out; |
| |
| __connman_6to4_remove(ipconfig); |
| |
| __connman_service_set_domainname(service, NULL); |
| __connman_service_set_pac(service, NULL); |
| |
| if (dhcp->timeservers != NULL) { |
| for (i = 0; dhcp->timeservers[i] != NULL; i++) { |
| __connman_service_timeserver_remove(service, |
| dhcp->timeservers[i]); |
| } |
| } |
| |
| if (dhcp->nameservers != NULL) { |
| for (i = 0; dhcp->nameservers[i] != NULL; i++) { |
| __connman_service_nameserver_remove(service, |
| dhcp->nameservers[i], FALSE); |
| } |
| } |
| |
| __connman_ipconfig_set_dhcp_address(ipconfig, |
| __connman_ipconfig_get_local(ipconfig)); |
| DBG("last address %s", __connman_ipconfig_get_dhcp_address(ipconfig)); |
| |
| __connman_ipconfig_address_remove(ipconfig); |
| |
| __connman_ipconfig_set_local(ipconfig, NULL); |
| __connman_ipconfig_set_broadcast(ipconfig, NULL); |
| __connman_ipconfig_set_gateway(ipconfig, NULL); |
| __connman_ipconfig_set_prefixlen(ipconfig, 0); |
| |
| if (dhcp->callback != NULL && callback) |
| dhcp->callback(dhcp->network, FALSE); |
| |
| out: |
| dhcp_free(dhcp); |
| } |
| |
| static void dhcp_valid(struct connman_dhcp *dhcp) |
| { |
| if (dhcp->callback != NULL) |
| dhcp->callback(dhcp->network, TRUE); |
| } |
| |
| static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| |
| DBG("No lease available"); |
| |
| dhcp_invalidate(dhcp, TRUE); |
| } |
| |
| static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| |
| DBG("Lease lost"); |
| |
| dhcp_invalidate(dhcp, TRUE); |
| } |
| |
| static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| |
| DBG("Lease lost"); |
| |
| dhcp_invalidate(dhcp, TRUE); |
| } |
| |
| static void wake_event_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| time_t valid_until; |
| connman_bool_t can_sleep; |
| |
| can_sleep = g_dhcp_get_next_event(dhcp_client, &valid_until); |
| DBG("can_sleep: %d until: %lld", can_sleep, (long long)valid_until); |
| |
| DBG(" dp %p \n", dhcp); |
| __connman_notifier_sleep_event(dhcp,can_sleep, valid_until); |
| } |
| |
| static gboolean compare_string_arrays(char **array_a, char **array_b) |
| { |
| int i; |
| |
| if (array_a == NULL || array_b == NULL) |
| return FALSE; |
| |
| if (g_strv_length(array_a) != g_strv_length(array_b)) |
| return FALSE; |
| |
| for (i = 0; array_a[i] != NULL && |
| array_b[i] != NULL; i++) { |
| if (g_strcmp0(array_a[i], array_b[i]) != 0) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| GList *list, *option = NULL; |
| char *address, *netmask = NULL, *gateway = NULL; |
| const char *c_address, *c_gateway; |
| char *domainname = NULL, *hostname = NULL; |
| char **nameservers, **timeservers, *pac = NULL; |
| int ns_entries; |
| struct connman_ipconfig *ipconfig; |
| struct connman_service *service; |
| unsigned char prefixlen, c_prefixlen; |
| gboolean ip_change; |
| int i; |
| |
| DBG("Lease available"); |
| |
| service = connman_service_lookup_from_network(dhcp->network); |
| if (service == NULL) { |
| connman_error("Can not lookup service"); |
| return; |
| } |
| |
| ipconfig = __connman_service_get_ip4config(service); |
| if (ipconfig == NULL) { |
| connman_error("Could not lookup ipconfig"); |
| return; |
| } |
| |
| c_address = __connman_ipconfig_get_local(ipconfig); |
| c_gateway = __connman_ipconfig_get_gateway(ipconfig); |
| c_prefixlen = __connman_ipconfig_get_prefixlen(ipconfig); |
| |
| address = g_dhcp_client_get_address(dhcp_client); |
| |
| __connman_ipconfig_set_dhcp_address(ipconfig, address); |
| DBG("last address %s", address); |
| |
| option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET); |
| if (option != NULL) |
| netmask = g_strdup(option->data); |
| |
| option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER); |
| if (option != NULL) |
| gateway = g_strdup(option->data); |
| |
| prefixlen = __connman_ipaddress_netmask_prefix_len(netmask); |
| if (prefixlen == 255) |
| connman_warn("netmask: %s is invalid", netmask); |
| |
| DBG("c_address %s", c_address); |
| |
| if (address != NULL && c_address != NULL && |
| g_strcmp0(address, c_address) != 0) |
| ip_change = TRUE; |
| else if (gateway != NULL && c_gateway != NULL && |
| g_strcmp0(gateway, c_gateway) != 0) |
| ip_change = TRUE; |
| else if (prefixlen != c_prefixlen) |
| ip_change = TRUE; |
| else if (c_address == NULL || c_gateway == NULL) |
| ip_change = TRUE; |
| else |
| ip_change = FALSE; |
| |
| option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER); |
| ns_entries = g_list_length(option); |
| nameservers = g_try_new0(char *, ns_entries + 1); |
| if (nameservers != NULL) { |
| for (i = 0, list = option; list; list = list->next, i++) |
| nameservers[i] = g_strdup(list->data); |
| nameservers[ns_entries] = NULL; |
| } |
| |
| option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME); |
| if (option != NULL) |
| domainname = g_strdup(option->data); |
| |
| if (connman_setting_get_bool("AllowHostnameUpdates") == TRUE) { |
| option = g_dhcp_client_get_option(dhcp_client, |
| G_DHCP_HOST_NAME); |
| if (option != NULL) |
| hostname = g_strdup(option->data); |
| } |
| |
| option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER); |
| ns_entries = g_list_length(option); |
| timeservers = g_try_new0(char *, ns_entries + 1); |
| if (timeservers != NULL) { |
| for (i = 0, list = option; list; list = list->next, i++) |
| timeservers[i] = g_strdup(list->data); |
| timeservers[ns_entries] = NULL; |
| } |
| |
| option = g_dhcp_client_get_option(dhcp_client, 252); |
| if (option != NULL) |
| pac = g_strdup(option->data); |
| |
| __connman_ipconfig_set_method(ipconfig, CONNMAN_IPCONFIG_METHOD_DHCP); |
| |
| if (ip_change == TRUE) { |
| __connman_ipconfig_set_local(ipconfig, address); |
| __connman_ipconfig_set_prefixlen(ipconfig, prefixlen); |
| __connman_ipconfig_set_gateway(ipconfig, gateway); |
| } |
| |
| if (compare_string_arrays(nameservers, dhcp->nameservers) == FALSE) { |
| if (dhcp->nameservers != NULL) { |
| for (i = 0; dhcp->nameservers[i] != NULL; i++) { |
| __connman_service_nameserver_remove(service, |
| dhcp->nameservers[i], FALSE); |
| } |
| g_strfreev(dhcp->nameservers); |
| } |
| |
| dhcp->nameservers = nameservers; |
| |
| for (i = 0; dhcp->nameservers != NULL && |
| dhcp->nameservers[i] != NULL; i++) { |
| __connman_service_nameserver_append(service, |
| dhcp->nameservers[i], FALSE); |
| } |
| } else { |
| g_strfreev(nameservers); |
| } |
| |
| if (compare_string_arrays(timeservers, dhcp->timeservers) == FALSE) { |
| if (dhcp->timeservers != NULL) { |
| for (i = 0; dhcp->timeservers[i] != NULL; i++) { |
| __connman_service_timeserver_remove(service, |
| dhcp->timeservers[i]); |
| } |
| g_strfreev(dhcp->timeservers); |
| } |
| |
| dhcp->timeservers = timeservers; |
| |
| for (i = 0; dhcp->timeservers != NULL && |
| dhcp->timeservers[i] != NULL; i++) { |
| __connman_service_timeserver_append(service, |
| dhcp->timeservers[i]); |
| } |
| } else { |
| g_strfreev(timeservers); |
| } |
| |
| if (g_strcmp0(pac, dhcp->pac) != 0) { |
| g_free(dhcp->pac); |
| dhcp->pac = pac; |
| |
| __connman_service_set_pac(service, dhcp->pac); |
| } |
| |
| __connman_service_set_domainname(service, domainname); |
| |
| if (domainname != NULL) |
| __connman_utsname_set_domainname(domainname); |
| |
| if (hostname != NULL) |
| __connman_utsname_set_hostname(hostname); |
| |
| if (ip_change == TRUE) |
| dhcp_valid(dhcp); |
| |
| __connman_6to4_probe(service); |
| |
| g_free(address); |
| g_free(netmask); |
| g_free(gateway); |
| g_free(domainname); |
| g_free(hostname); |
| } |
| |
| static void ipv4ll_available_cb(GDHCPClient *dhcp_client, gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| char *address, *netmask; |
| struct connman_service *service; |
| struct connman_ipconfig *ipconfig; |
| unsigned char prefixlen; |
| |
| DBG("IPV4LL available"); |
| |
| service = connman_service_lookup_from_network(dhcp->network); |
| if (service == NULL) |
| return; |
| |
| ipconfig = __connman_service_get_ip4config(service); |
| if (ipconfig == NULL) |
| return; |
| |
| address = g_dhcp_client_get_address(dhcp_client); |
| netmask = g_dhcp_client_get_netmask(dhcp_client); |
| |
| prefixlen = __connman_ipaddress_netmask_prefix_len(netmask); |
| |
| __connman_ipconfig_set_method(ipconfig, CONNMAN_IPCONFIG_METHOD_DHCP); |
| __connman_ipconfig_set_local(ipconfig, address); |
| __connman_ipconfig_set_prefixlen(ipconfig, prefixlen); |
| __connman_ipconfig_set_gateway(ipconfig, NULL); |
| |
| dhcp_valid(dhcp); |
| |
| g_free(address); |
| g_free(netmask); |
| } |
| |
| static void dhcp_debug(const char *str, void *data) |
| { |
| connman_info("%s: %s\n", (const char *) data, str); |
| } |
| |
| static int dhcp_request(struct connman_dhcp *dhcp) |
| { |
| struct connman_service *service; |
| struct connman_ipconfig *ipconfig; |
| GDHCPClient *dhcp_client; |
| GDHCPClientError error; |
| const char *hostname; |
| int index; |
| |
| DBG("dhcp %p", dhcp); |
| |
| index = connman_network_get_index(dhcp->network); |
| |
| dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error); |
| if (error != G_DHCP_CLIENT_ERROR_NONE) |
| return -EINVAL; |
| |
| if (getenv("CONNMAN_DHCP_DEBUG")) |
| g_dhcp_client_set_debug(dhcp_client, dhcp_debug, "DHCP"); |
| |
| g_dhcp_client_set_id(dhcp_client); |
| |
| hostname = connman_utsname_get_hostname(); |
| if (hostname != NULL) |
| g_dhcp_client_set_send(dhcp_client, G_DHCP_HOST_NAME, hostname); |
| |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME); |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET); |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER); |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME); |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER); |
| g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER); |
| g_dhcp_client_set_request(dhcp_client, 252); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE, |
| lease_available_cb, dhcp); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE, |
| ipv4ll_available_cb, dhcp); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_WAKE_EVENT, |
| wake_event_cb, dhcp); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp); |
| |
| g_dhcp_client_register_event(dhcp_client, |
| G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp); |
| |
| dhcp->dhcp_client = dhcp_client; |
| |
| service = connman_service_lookup_from_network(dhcp->network); |
| ipconfig = __connman_service_get_ip4config(service); |
| |
| /* |
| * Clear the addresses at startup so that lease callback will |
| * take the lease and set ip address properly. |
| */ |
| __connman_ipconfig_clear_address(ipconfig); |
| |
| return g_dhcp_client_start(dhcp_client, |
| __connman_ipconfig_get_dhcp_address(ipconfig)); |
| } |
| |
| static int dhcp_release(struct connman_dhcp *dhcp) |
| { |
| DBG("dhcp %p", dhcp); |
| |
| if (dhcp == NULL) |
| return -EINVAL; |
| |
| if (dhcp->dhcp_client == NULL) |
| return 0; |
| |
| g_dhcp_client_stop(dhcp->dhcp_client); |
| g_dhcp_client_unref(dhcp->dhcp_client); |
| |
| dhcp->dhcp_client = NULL; |
| |
| return 0; |
| } |
| |
| static void remove_network(gpointer user_data) |
| { |
| struct connman_dhcp *dhcp = user_data; |
| |
| DBG("dhcp %p", dhcp); |
| |
| dhcp_invalidate(dhcp, FALSE); |
| dhcp_release(dhcp); |
| |
| g_free(dhcp); |
| } |
| |
| int __connman_dhcp_start(struct connman_network *network, dhcp_cb callback) |
| { |
| struct connman_dhcp *dhcp; |
| |
| DBG(""); |
| |
| dhcp = g_try_new0(struct connman_dhcp, 1); |
| if (dhcp == NULL) |
| return -ENOMEM; |
| |
| dhcp->network = network; |
| dhcp->callback = callback; |
| |
| connman_network_ref(network); |
| |
| g_hash_table_replace(network_table, network, dhcp); |
| |
| return dhcp_request(dhcp); |
| } |
| |
| void __connman_dhcp_stop(struct connman_network *network) |
| { |
| DBG("network %p", network); |
| |
| if (network_table == NULL) |
| return; |
| |
| if (g_hash_table_remove(network_table, network) == TRUE) |
| connman_network_unref(network); |
| } |
| |
| int __connman_dhcp_init(void) |
| { |
| DBG(""); |
| |
| network_table = g_hash_table_new_full(g_direct_hash, g_direct_equal, |
| NULL, remove_network); |
| |
| return 0; |
| } |
| |
| void __connman_dhcp_cleanup(void) |
| { |
| DBG(""); |
| |
| g_hash_table_destroy(network_table); |
| network_table = NULL; |
| } |