+ struct config_param_list config;
+ char *config_buf;
+ bool init_available;
+ char script_name[];
+};
+
+struct proto_shell_dependency {
+ struct list_head list;
+
+ struct proto_shell_state *proto;
+ struct interface_user dep;
+
+ union if_addr host;
+ bool v6;
+};
+
+struct proto_shell_state {
+ struct interface_proto_state proto;
+ struct proto_shell_handler *handler;
+ struct blob_attr *config;
+
+ struct uloop_timeout teardown_timeout;
+
+ struct netifd_process script_task;
+ struct netifd_process proto_task;
+
+ enum proto_shell_sm sm;
+ bool proto_task_killed;
+
+ int last_error;
+
+ struct list_head deps;
+};
+
+static void
+proto_shell_check_dependencies(struct proto_shell_state *state)
+{
+ struct proto_shell_dependency *dep;
+ bool available = true;
+
+ list_for_each_entry(dep, &state->deps, list) {
+ if (dep->dep.iface)
+ continue;
+
+ available = false;
+ break;
+ }
+
+ interface_set_available(state->proto.iface, available);
+}
+
+static void
+proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
+ enum interface_event ev);
+static void
+proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
+ enum interface_event ev);
+
+static void
+proto_shell_update_host_dep(struct proto_shell_dependency *dep)
+{
+ struct interface *iface;
+
+ if (dep->dep.iface)
+ goto out;
+
+ iface = interface_ip_add_target_route(&dep->host, dep->v6);
+ if (!iface)
+ goto out;
+
+ interface_remove_user(&dep->dep);
+ dep->dep.cb = proto_shell_if_down_cb;
+ interface_add_user(&dep->dep, iface);
+
+out:
+ proto_shell_check_dependencies(dep->proto);
+}
+
+static void
+proto_shell_clear_host_dep(struct proto_shell_state *state)
+{
+ struct proto_shell_dependency *dep, *tmp;
+
+ list_for_each_entry_safe(dep, tmp, &state->deps, list) {
+ interface_remove_user(&dep->dep);
+ list_del(&dep->list);
+ free(dep);
+ }
+}
+
+static int
+proto_shell_handler(struct interface_proto_state *proto,
+ enum interface_proto_cmd cmd, bool force)
+{
+ struct proto_shell_state *state;
+ struct proto_shell_handler *handler;
+ struct netifd_process *proc;
+ static char error_buf[32];
+ const char *argv[7];
+ char *envp[2];
+ const char *action;
+ char *config;
+ int ret, i = 0, j = 0;
+
+ state = container_of(proto, struct proto_shell_state, proto);
+ handler = state->handler;
+ proc = &state->script_task;
+
+ if (cmd == PROTO_CMD_SETUP) {
+ action = "setup";
+ state->last_error = -1;
+ proto_shell_clear_host_dep(state);
+ } else {
+ if (state->sm == S_TEARDOWN)
+ return 0;
+
+ if (state->script_task.uloop.pending) {
+ if (state->sm != S_SETUP_ABORT) {
+ uloop_timeout_set(&state->teardown_timeout, 1000);
+ kill(state->script_task.uloop.pid, SIGTERM);
+ if (state->proto_task.uloop.pending)
+ kill(state->proto_task.uloop.pid, SIGTERM);
+ state->sm = S_SETUP_ABORT;
+ }
+ return 0;
+ }
+
+ action = "teardown";
+ state->sm = S_TEARDOWN;
+ if (state->last_error >= 0) {
+ snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
+ envp[j++] = error_buf;
+ }
+ uloop_timeout_set(&state->teardown_timeout, 5000);
+ }
+
+ config = blobmsg_format_json(state->config, true);
+ if (!config)
+ return -1;
+
+ argv[i++] = handler->script_name;
+ argv[i++] = handler->proto.name;
+ argv[i++] = action;
+ argv[i++] = proto->iface->name;
+ argv[i++] = config;
+ if (proto->iface->main_dev.dev)
+ argv[i++] = proto->iface->main_dev.dev->ifname;
+ argv[i] = NULL;
+ envp[j] = NULL;
+
+ ret = netifd_start_process(argv, envp, proc);
+ free(config);
+
+ return ret;
+}
+
+static void
+proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
+ enum interface_event ev)
+{
+ struct proto_shell_dependency *pdep;
+
+ if (ev != IFEV_UP)
+ return;
+
+ pdep = container_of(dep, struct proto_shell_dependency, dep);
+ proto_shell_update_host_dep(pdep);
+}
+
+static void
+proto_shell_if_down_cb(struct interface_user *dep, struct interface *iface,
+ enum interface_event ev)
+{
+ struct proto_shell_dependency *pdep;
+ struct proto_shell_state *state;
+
+ if (ev == IFEV_UP)
+ return;
+
+ pdep = container_of(dep, struct proto_shell_dependency, dep);
+ interface_remove_user(dep);
+ dep->cb = proto_shell_if_up_cb;
+ interface_add_user(dep, NULL);
+
+ state = pdep->proto;
+ if (state->sm == S_IDLE) {
+ state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+ proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
+ }
+}
+
+static void
+proto_shell_task_finish(struct proto_shell_state *state,
+ struct netifd_process *task)
+{
+ switch (state->sm) {
+ case S_IDLE:
+ if (task == &state->proto_task)
+ state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+ /* fall through */
+ case S_SETUP:
+ if (task == &state->proto_task)
+ proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
+ false);
+ break;
+
+ case S_SETUP_ABORT:
+ if (state->script_task.uloop.pending ||
+ state->proto_task.uloop.pending)
+ break;
+
+ uloop_timeout_cancel(&state->teardown_timeout);
+ state->sm = S_IDLE;
+ proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
+ break;
+
+ case S_TEARDOWN:
+ if (state->script_task.uloop.pending)
+ break;
+
+ if (state->proto_task.uloop.pending) {
+ if (!state->proto_task_killed)
+ kill(state->proto_task.uloop.pid, SIGTERM);
+ break;
+ }
+
+ uloop_timeout_cancel(&state->teardown_timeout);
+ state->sm = S_IDLE;
+ state->proto.proto_event(&state->proto, IFPEV_DOWN);
+ break;
+ }
+}
+
+static void
+proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
+{
+ struct proto_shell_state *state;
+
+ state = container_of(timeout, struct proto_shell_state, teardown_timeout);
+
+ netifd_kill_process(&state->script_task);
+ netifd_kill_process(&state->proto_task);
+ proto_shell_task_finish(state, NULL);
+}
+
+static void
+proto_shell_script_cb(struct netifd_process *p, int ret)
+{
+ struct proto_shell_state *state;
+
+ state = container_of(p, struct proto_shell_state, script_task);
+ proto_shell_task_finish(state, p);
+}
+
+static void
+proto_shell_task_cb(struct netifd_process *p, int ret)
+{
+ struct proto_shell_state *state;
+
+ state = container_of(p, struct proto_shell_state, proto_task);
+
+ if (state->sm == S_IDLE || state->sm == S_SETUP)
+ state->last_error = WEXITSTATUS(ret);
+
+ proto_shell_task_finish(state, p);
+}
+
+static void
+proto_shell_free(struct interface_proto_state *proto)
+{
+ struct proto_shell_state *state;
+
+ state = container_of(proto, struct proto_shell_state, proto);
+ uloop_timeout_cancel(&state->teardown_timeout);
+ proto_shell_clear_host_dep(state);
+ netifd_kill_process(&state->script_task);
+ netifd_kill_process(&state->proto_task);
+ free(state->config);
+ free(state);
+}
+
+static void
+proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
+ bool v6)
+{
+ struct blob_attr *cur;
+ int rem;
+
+ blobmsg_for_each_attr(cur, attr, rem) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
+ DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
+ continue;
+ }
+
+ interface_ip_add_route(iface, cur, v6);
+ }
+}
+
+static void
+proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
+{
+ struct blob_attr *cur;
+ int rem;
+
+ blobmsg_for_each_attr(cur, attr, rem)
+ interface_add_data(iface, cur);
+}
+
+static struct device *
+proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
+{
+ struct device *dev;
+ struct blob_buf b;
+
+ memset(&b, 0, sizeof(b));
+ blob_buf_init(&b, 0);
+ blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
+ dev = device_create(name, &tunnel_device_type, blob_data(b.head));
+ blob_buf_free(&b);
+
+ return dev;
+}
+
+enum {
+ NOTIFY_ACTION,
+ NOTIFY_ERROR,
+ NOTIFY_COMMAND,
+ NOTIFY_ENV,
+ NOTIFY_SIGNAL,
+ NOTIFY_AVAILABLE,
+ NOTIFY_LINK_UP,
+ NOTIFY_IFNAME,
+ NOTIFY_ADDR_EXT,
+ NOTIFY_ROUTES,
+ NOTIFY_ROUTES6,
+ NOTIFY_TUNNEL,
+ NOTIFY_DATA,
+ NOTIFY_KEEP,
+ NOTIFY_HOST,
+ NOTIFY_DNS,
+ NOTIFY_DNS_SEARCH,
+ __NOTIFY_LAST
+};
+
+static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
+ [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
+ [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
+ [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
+ [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
+ [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
+ [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
+ [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
+ [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
+ [NOTIFY_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
+ [NOTIFY_HOST] = { .name = "host", .type = BLOBMSG_TYPE_STRING },
+ [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
+ [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },