mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-12-22 13:02:44 +01:00
resolve: Refactor resolve module
Resolve module does not currently track any state that has been set on a per ifindex basis. This was okay while the set of information we supported was quite small. However, with dhcpv6 support being prepared, a more flexible framework is needed. Change the resolve API to allocate and return an instance for a given ifindex that has the ability to track information that was provided.
This commit is contained in:
Denis Kenzior
parent
ac5ddda56f
commit
e58a818ce9
@ -53,6 +53,8 @@ struct netconfig {
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netconfig_notify_func_t notify;
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void *user_data;
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struct resolve *resolve;
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};
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struct netconfig_ifaddr {
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@ -776,7 +778,7 @@ static void netconfig_ipv4_ifaddr_add_cmd_cb(int error, uint16_t type,
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goto domain_name;
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}
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resolve_add_dns(netconfig->ifindex, ifaddr->family, dns);
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resolve_add_dns(netconfig->resolve, ifaddr->family, dns);
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l_strv_free(dns);
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domain_name:
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@ -785,7 +787,7 @@ domain_name:
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if (!domain_name)
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goto done;
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resolve_add_domain_name(netconfig->ifindex, domain_name);
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resolve_add_domain_name(netconfig->resolve, domain_name);
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l_free(domain_name);
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done:
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@ -846,7 +848,7 @@ static void netconfig_ipv6_ifaddr_add_cmd_cb(int error, uint16_t type,
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return;
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}
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resolve_add_dns(netconfig->ifindex, AF_INET6, dns);
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resolve_add_dns(netconfig->resolve, AF_INET6, dns);
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l_strv_free(dns);
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}
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@ -1144,7 +1146,7 @@ bool netconfig_reset(struct netconfig *netconfig)
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netconfig_ipv6_select_and_uninstall(netconfig);
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netconfig->rtm_v6_protocol = 0;
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resolve_remove(netconfig->ifindex);
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resolve_revert(netconfig->resolve);
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return true;
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}
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@ -1179,6 +1181,7 @@ struct netconfig *netconfig_new(uint32_t ifindex)
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netconfig = l_new(struct netconfig, 1);
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netconfig->ifindex = ifindex;
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netconfig->ifaddr_list = l_queue_new();
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netconfig->resolve = resolve_new(ifindex);
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netconfig_ipv4_dhcp_create(netconfig);
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@ -1200,8 +1203,9 @@ void netconfig_destroy(struct netconfig *netconfig)
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netconfig_ipv4_select_and_uninstall(netconfig);
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if (netconfig->rtm_protocol || netconfig->rtm_v6_protocol)
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resolve_remove(netconfig->ifindex);
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resolve_revert(netconfig->resolve);
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resolve_free(netconfig->resolve);
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netconfig_free(netconfig);
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}
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326
src/resolve.c
326
src/resolve.c
@ -37,33 +37,83 @@
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#include "src/dbus.h"
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#include "src/resolve.h"
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struct resolve_ops {
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void (*add_dns)(struct resolve *resolve,
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uint8_t type, char **dns_list);
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void (*add_domain_name)(struct resolve *resolve,
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const char *domain_name);
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void (*revert)(struct resolve *resolve);
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void (*destroy)(struct resolve *resolve);
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};
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struct resolve {
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const struct resolve_ops *ops;
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uint32_t ifindex;
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};
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static inline void _resolve_init(struct resolve *resolve, uint32_t ifindex,
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const struct resolve_ops *ops)
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{
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resolve->ifindex = ifindex;
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resolve->ops = ops;
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}
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void resolve_add_dns(struct resolve *resolve, uint8_t type, char **dns_list)
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{
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if (!dns_list || !*dns_list)
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return;
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if (!resolve->ops->add_dns)
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return;
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resolve->ops->add_dns(resolve, type, dns_list);
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}
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void resolve_add_domain_name(struct resolve *resolve, const char *domain_name)
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{
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if (!domain_name)
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return;
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if (!resolve->ops->add_domain_name)
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return;
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resolve->ops->add_domain_name(resolve, domain_name);
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}
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void resolve_revert(struct resolve *resolve)
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{
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if (!resolve->ops->revert)
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return;
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resolve->ops->revert(resolve);
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}
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void resolve_free(struct resolve *resolve)
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{
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resolve->ops->destroy(resolve);
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}
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struct resolve_method_ops {
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void *(*init)(void);
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void (*exit)(void *data);
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void (*add_dns)(uint32_t ifindex, uint8_t type, char **dns_list,
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void *data);
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void (*add_domain_name)(uint32_t ifindex, const char *domain_name,
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void *data);
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void (*remove)(uint32_t ifindex, void *data);
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int (*init)(void);
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void (*exit)(void);
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struct resolve *(*alloc)(uint32_t ifindex);
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};
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struct resolve_method {
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void *data;
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const struct resolve_method_ops *ops;
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};
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static struct resolve_method method;
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static char *resolvconf_path;
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#define SYSTEMD_RESOLVED_SERVICE "org.freedesktop.resolve1"
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#define SYSTEMD_RESOLVED_MANAGER_PATH "/org/freedesktop/resolve1"
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#define SYSTEMD_RESOLVED_MANAGER_INTERFACE "org.freedesktop.resolve1.Manager"
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struct systemd_state {
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struct systemd_method_state {
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uint32_t service_watch;
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bool is_ready:1;
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};
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struct systemd_method_state systemd_state;
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struct systemd {
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struct resolve super;
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};
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static void systemd_link_dns_reply(struct l_dbus_message *message,
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void *user_data)
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{
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@ -119,24 +169,18 @@ static bool systemd_builder_add_dns(struct l_dbus_message_builder *builder,
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return true;
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}
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static void resolve_systemd_add_dns(uint32_t ifindex, uint8_t type,
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char **dns_list, void *data)
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static void resolve_systemd_add_dns(struct resolve *resolve,
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uint8_t type, char **dns_list)
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{
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struct systemd_state *state = data;
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struct l_dbus_message_builder *builder;
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struct l_dbus_message *message;
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l_debug("ifindex: %u", ifindex);
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if (!state->is_ready) {
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l_error("resolve-systemd: Failed to add DNS entries. "
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"Is 'systemd-resolved' service running?");
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l_debug("ifindex: %u", resolve->ifindex);
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if (L_WARN_ON(!systemd_state.is_ready))
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return;
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}
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message =
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l_dbus_message_new_method_call(dbus_get_bus(),
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message = l_dbus_message_new_method_call(dbus_get_bus(),
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SYSTEMD_RESOLVED_SERVICE,
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SYSTEMD_RESOLVED_MANAGER_PATH,
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SYSTEMD_RESOLVED_MANAGER_INTERFACE,
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@ -151,7 +195,7 @@ static void resolve_systemd_add_dns(uint32_t ifindex, uint8_t type,
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return;
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}
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l_dbus_message_builder_append_basic(builder, 'i', &ifindex);
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l_dbus_message_builder_append_basic(builder, 'i', &resolve->ifindex);
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l_dbus_message_builder_enter_array(builder, "(iay)");
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@ -176,7 +220,7 @@ static void resolve_systemd_add_dns(uint32_t ifindex, uint8_t type,
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l_dbus_message_builder_destroy(builder);
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l_dbus_send_with_reply(dbus_get_bus(), message, systemd_link_dns_reply,
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state, NULL);
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NULL, NULL);
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}
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static void systemd_link_add_domains_reply(struct l_dbus_message *message,
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@ -194,24 +238,17 @@ static void systemd_link_add_domains_reply(struct l_dbus_message *message,
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name, text);
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}
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static void resolve_systemd_add_domain_name(uint32_t ifindex,
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const char *domain_name,
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void *data)
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static void resolve_systemd_add_domain_name(struct resolve *resolve,
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const char *domain_name)
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{
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struct systemd_state *state = data;
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struct l_dbus_message *message;
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l_debug("ifindex: %u", ifindex);
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if (!state->is_ready) {
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l_error("resolve-systemd: Failed to add domain name. "
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"Is 'systemd-resolved' service running?");
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l_debug("ifindex: %u", resolve->ifindex);
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if (L_WARN_ON(!systemd_state.is_ready))
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return;
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}
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message =
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l_dbus_message_new_method_call(dbus_get_bus(),
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message = l_dbus_message_new_method_call(dbus_get_bus(),
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SYSTEMD_RESOLVED_SERVICE,
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SYSTEMD_RESOLVED_MANAGER_PATH,
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SYSTEMD_RESOLVED_MANAGER_INTERFACE,
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@ -220,29 +257,23 @@ static void resolve_systemd_add_domain_name(uint32_t ifindex,
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if (!message)
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return;
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l_dbus_message_set_arguments(message, "ia(sb)", ifindex,
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l_dbus_message_set_arguments(message, "ia(sb)", resolve->ifindex,
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1, domain_name, false);
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l_dbus_send_with_reply(dbus_get_bus(), message,
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systemd_link_add_domains_reply, state, NULL);
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systemd_link_add_domains_reply, NULL, NULL);
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}
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static void resolve_systemd_remove(uint32_t ifindex, void *data)
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static void resolve_systemd_revert(struct resolve *resolve)
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{
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struct systemd_state *state = data;
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struct l_dbus_message *message;
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l_debug("ifindex: %u", ifindex);
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if (!state->is_ready) {
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l_error("resolve-systemd: Failed to remove DNS entries. "
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"Is 'systemd-resolved' service running?");
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l_debug("ifindex: %u", resolve->ifindex);
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if (L_WARN_ON(!systemd_state.is_ready))
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return;
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}
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message =
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l_dbus_message_new_method_call(dbus_get_bus(),
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message = l_dbus_message_new_method_call(dbus_get_bus(),
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SYSTEMD_RESOLVED_SERVICE,
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SYSTEMD_RESOLVED_MANAGER_PATH,
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SYSTEMD_RESOLVED_MANAGER_INTERFACE,
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@ -250,73 +281,88 @@ static void resolve_systemd_remove(uint32_t ifindex, void *data)
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if (!message)
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return;
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l_dbus_message_set_arguments(message, "i", ifindex);
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l_dbus_message_set_arguments(message, "i", resolve->ifindex);
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l_dbus_send_with_reply(dbus_get_bus(), message, systemd_link_dns_reply,
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state, NULL);
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NULL, NULL);
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}
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static void resolve_systemd_destroy(struct resolve *resolve)
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{
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struct systemd *sd = l_container_of(resolve, struct systemd, super);
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l_free(sd);
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}
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static const struct resolve_ops systemd_ops = {
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.add_dns = resolve_systemd_add_dns,
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.add_domain_name = resolve_systemd_add_domain_name,
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.revert = resolve_systemd_revert,
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.destroy = resolve_systemd_destroy,
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};
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static void systemd_appeared(struct l_dbus *dbus, void *user_data)
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{
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struct systemd_state *state = user_data;
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state->is_ready = true;
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systemd_state.is_ready = true;
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}
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static void systemd_disappeared(struct l_dbus *dbus, void *user_data)
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{
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struct systemd_state *state = user_data;
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state->is_ready = false;
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systemd_state.is_ready = false;
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}
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static void *resolve_systemd_init(void)
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static int resolve_systemd_init(void)
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{
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struct systemd_state *state;
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state = l_new(struct systemd_state, 1);
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state->service_watch =
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l_dbus_add_service_watch(dbus_get_bus(),
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systemd_state.service_watch =
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l_dbus_add_service_watch(dbus_get_bus(),
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SYSTEMD_RESOLVED_SERVICE,
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systemd_appeared,
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systemd_disappeared,
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state, NULL);
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NULL, NULL);
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return state;
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return 0;
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}
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static void resolve_systemd_exit(void *data)
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static void resolve_systemd_exit(void)
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{
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struct systemd_state *state = data;
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l_dbus_remove_watch(dbus_get_bus(), state->service_watch);
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l_free(state);
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l_dbus_remove_watch(dbus_get_bus(), systemd_state.service_watch);
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memset(&systemd_state, 0, sizeof(systemd_state));
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}
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static const struct resolve_method_ops resolve_method_systemd = {
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static struct resolve *resolve_systemd_alloc(uint32_t ifindex)
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{
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struct systemd *sd = l_new(struct systemd, 1);
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_resolve_init(&sd->super, ifindex, &systemd_ops);
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return &sd->super;
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}
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static const struct resolve_method_ops resolve_method_systemd_ops = {
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.init = resolve_systemd_init,
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.exit = resolve_systemd_exit,
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.add_dns = resolve_systemd_add_dns,
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.add_domain_name = resolve_systemd_add_domain_name,
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.remove = resolve_systemd_remove,
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.alloc = resolve_systemd_alloc,
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};
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static void resolve_resolvconf_add_dns(uint32_t ifindex, uint8_t type,
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char **dns_list, void *data)
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char *resolvconf_path;
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struct resolvconf {
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struct resolve super;
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char *ifname;
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};
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static void resolve_resolvconf_add_dns(struct resolve *resolve,
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uint8_t type, char **dns_list)
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{
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bool *ready = data;
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FILE *resolvconf;
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struct l_string *content;
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int error;
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L_AUTO_FREE_VAR(char *, cmd) = NULL;
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L_AUTO_FREE_VAR(char *, str) = NULL;
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if (!*ready)
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if (L_WARN_ON(!resolvconf_path))
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return;
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cmd = l_strdup_printf("%s -a %u", resolvconf_path, ifindex);
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cmd = l_strdup_printf("%s -a %u", resolvconf_path, resolve->ifindex);
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if (!(resolvconf = popen(cmd, "w"))) {
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l_error("resolve: Failed to start %s (%s).", resolvconf_path,
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@ -344,17 +390,16 @@ static void resolve_resolvconf_add_dns(uint32_t ifindex, uint8_t type,
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error);
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}
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static void resolve_resolvconf_remove(uint32_t ifindex, void *data)
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static void resolve_resolvconf_revert(struct resolve *resolve)
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{
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bool *ready = data;
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FILE *resolvconf;
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int error;
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L_AUTO_FREE_VAR(char *, cmd) = NULL;
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if (!*ready)
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if (L_WARN_ON(!resolvconf_path))
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return;
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cmd = l_strdup_printf("%s -d %u", resolvconf_path, ifindex);
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cmd = l_strdup_printf("%s -d %u", resolvconf_path, resolve->ifindex);
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if (!(resolvconf = popen(cmd, "r"))) {
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l_error("resolve: Failed to start %s (%s).", resolvconf_path,
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@ -371,16 +416,28 @@ static void resolve_resolvconf_remove(uint32_t ifindex, void *data)
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error);
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}
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static void *resolve_resolvconf_init(void)
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static void resolve_resolvconf_destroy(struct resolve *resolve)
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{
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struct resolvconf *rc =
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l_container_of(resolve, struct resolvconf, super);
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l_free(rc->ifname);
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l_free(rc);
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}
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static struct resolve_ops resolvconf_ops = {
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.add_dns = resolve_resolvconf_add_dns,
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.revert = resolve_resolvconf_revert,
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.destroy = resolve_resolvconf_destroy,
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};
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static int resolve_resolvconf_init(void)
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{
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static const char *default_path = "/sbin:/usr/sbin";
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bool *ready;
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const char *path;
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ready = l_new(bool, 1);
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*ready = false;
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l_debug("Trying to find resolvconf in $PATH");
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path = getenv("PATH");
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if (path)
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resolvconf_path = l_path_find("resolvconf", path, X_OK);
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@ -392,66 +449,54 @@ static void *resolve_resolvconf_init(void)
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if (!resolvconf_path) {
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l_error("No usable resolvconf found on system");
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return ready;
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return -ENOENT;
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}
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l_debug("resolvconf found as: %s", resolvconf_path);
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*ready = true;
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return ready;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void resolve_resolvconf_exit(void *data)
|
||||
static void resolve_resolvconf_exit(void)
|
||||
{
|
||||
bool *ready = data;
|
||||
|
||||
l_free(resolvconf_path);
|
||||
resolvconf_path = NULL;
|
||||
l_free(ready);
|
||||
}
|
||||
|
||||
static const struct resolve_method_ops resolve_method_resolvconf = {
|
||||
static struct resolve *resolve_resolvconf_alloc(uint32_t ifindex)
|
||||
{
|
||||
struct resolvconf *rc = l_new(struct resolvconf, 1);
|
||||
|
||||
_resolve_init(&rc->super, ifindex, &resolvconf_ops);
|
||||
|
||||
rc->ifname = l_net_get_name(ifindex);
|
||||
if (!rc->ifname)
|
||||
rc->ifname = l_strdup_printf("%u", ifindex);
|
||||
|
||||
return &rc->super;
|
||||
}
|
||||
|
||||
static const struct resolve_method_ops resolve_method_resolvconf_ops = {
|
||||
.init = resolve_resolvconf_init,
|
||||
.exit = resolve_resolvconf_exit,
|
||||
.add_dns = resolve_resolvconf_add_dns,
|
||||
.remove = resolve_resolvconf_remove,
|
||||
.alloc = resolve_resolvconf_alloc,
|
||||
};
|
||||
|
||||
void resolve_add_dns(uint32_t ifindex, uint8_t type, char **dns_list)
|
||||
static const struct resolve_method_ops *configured_method;
|
||||
|
||||
struct resolve *resolve_new(uint32_t ifindex)
|
||||
{
|
||||
if (!dns_list || !*dns_list)
|
||||
return;
|
||||
if (L_WARN_ON(!configured_method))
|
||||
return NULL;
|
||||
|
||||
if (!method.ops || !method.ops->add_dns)
|
||||
return;
|
||||
|
||||
method.ops->add_dns(ifindex, type, dns_list, method.data);
|
||||
}
|
||||
|
||||
void resolve_add_domain_name(uint32_t ifindex, const char *domain_name)
|
||||
{
|
||||
if (!domain_name)
|
||||
return;
|
||||
|
||||
if (!method.ops || !method.ops->add_domain_name)
|
||||
return;
|
||||
|
||||
method.ops->add_domain_name(ifindex, domain_name, method.data);
|
||||
}
|
||||
|
||||
void resolve_remove(uint32_t ifindex)
|
||||
{
|
||||
if (!method.ops || !method.ops->remove)
|
||||
return;
|
||||
|
||||
method.ops->remove(ifindex, method.data);
|
||||
return configured_method->alloc(ifindex);
|
||||
}
|
||||
|
||||
static const struct {
|
||||
const char *name;
|
||||
const struct resolve_method_ops *method_ops;
|
||||
} resolve_method_ops_list[] = {
|
||||
{ "systemd", &resolve_method_systemd },
|
||||
{ "resolvconf", &resolve_method_resolvconf },
|
||||
{ "systemd", &resolve_method_systemd_ops },
|
||||
{ "resolvconf", &resolve_method_resolvconf_ops },
|
||||
{ }
|
||||
};
|
||||
|
||||
@ -488,28 +533,25 @@ static int resolve_init(void)
|
||||
if (strcmp(resolve_method_ops_list[i].name, method_name))
|
||||
continue;
|
||||
|
||||
method.ops = resolve_method_ops_list[i].method_ops;
|
||||
|
||||
configured_method = resolve_method_ops_list[i].method_ops;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!method.ops) {
|
||||
if (!configured_method) {
|
||||
l_error("Unknown resolution method: %s", method_name);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (method.ops->init)
|
||||
method.data = method.ops->init();
|
||||
|
||||
return 0;
|
||||
return configured_method->init();
|
||||
}
|
||||
|
||||
static void resolve_exit(void)
|
||||
{
|
||||
if (!method.ops || !method.ops->exit)
|
||||
if (!configured_method)
|
||||
return;
|
||||
|
||||
method.ops->exit(method.data);
|
||||
configured_method->exit();
|
||||
configured_method = NULL;
|
||||
}
|
||||
|
||||
IWD_MODULE(resolve, resolve_init, resolve_exit)
|
||||
|
||||
@ -20,6 +20,8 @@
|
||||
*
|
||||
*/
|
||||
|
||||
void resolve_add_dns(uint32_t ifindex, uint8_t type, char **dns_list);
|
||||
void resolve_add_domain_name(uint32_t ifindex, const char *domain_name);
|
||||
void resolve_remove(uint32_t ifindex);
|
||||
struct resolve *resolve_new(uint32_t ifindex);
|
||||
void resolve_add_dns(struct resolve *resolve, uint8_t type, char **dns_list);
|
||||
void resolve_add_domain_name(struct resolve *resolve, const char *domain_name);
|
||||
void resolve_revert(struct resolve *resolve);
|
||||
void resolve_free(struct resolve *resolve);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user