X-Git-Url: http://git.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=proto-shell.c;h=bac57e03176c8876ffa53d948b709a83986cf077;hp=bb42c982b5f532477ba880c309e131d0922e0379;hb=c68587663ef18fa87841be0a5281264361fab411;hpb=13cb667dc2c4131663e728bfc4bf3de465d52b20

diff --git a/proto-shell.c b/proto-shell.c
index bb42c98..bac57e0 100644
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -1,27 +1,63 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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.
+ */
+#define _GNU_SOURCE
+
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
-#include <glob.h>
-#include <unistd.h>
-#include <fcntl.h>
 #include <signal.h>
 
-#include <libubox/blobmsg_json.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
 
 #include "netifd.h"
 #include "interface.h"
 #include "interface-ip.h"
 #include "proto.h"
+#include "system.h"
+#include "handler.h"
 
-static LIST_HEAD(handlers);
-static int proto_fd;
+static int proto_fd = -1;
+
+enum proto_shell_sm {
+	S_IDLE,
+	S_SETUP,
+	S_SETUP_ABORT,
+	S_TEARDOWN,
+};
 
 struct proto_shell_handler {
 	struct list_head list;
 	struct proto_handler proto;
-	struct config_param_list config;
 	char *config_buf;
-	char script_name[];
+	char *script_name;
+	bool init_available;
+	bool no_proto_task;
+
+	struct uci_blob_param_list config;
+};
+
+struct proto_shell_dependency {
+	struct list_head list;
+
+	char *interface;
+	struct proto_shell_state *proto;
+	struct interface_user dep;
+
+	union if_addr host;
+	bool v6;
 };
 
 struct proto_shell_state {
@@ -29,35 +65,77 @@ struct proto_shell_state {
 	struct proto_shell_handler *handler;
 	struct blob_attr *config;
 
-	struct device_user l3_dev;
+	struct uloop_timeout teardown_timeout;
+
+	struct netifd_process script_task;
+	struct netifd_process proto_task;
+
+	enum proto_shell_sm sm;
+	bool proto_task_killed;
+	bool renew_pending;
+
+	int last_error;
 
-	struct uloop_timeout setup_timeout;
-	struct uloop_process setup_task;
-	struct uloop_process teardown_task;
-	bool teardown_pending;
+	struct list_head deps;
 };
 
-static int
-run_script(const char **argv, struct uloop_process *proc)
+static void
+proto_shell_check_dependencies(struct proto_shell_state *state)
 {
-	int pid;
+	struct proto_shell_dependency *dep;
+	bool available = true;
 
-	if ((pid = fork()) < 0)
-		return -1;
+	list_for_each_entry(dep, &state->deps, list) {
+		if (dep->dep.iface)
+			continue;
 
-	if (!pid) {
-		fchdir(proto_fd);
-		execvp(argv[0], (char **) argv);
-		exit(127);
+		available = false;
+		break;
 	}
 
-	if (pid < 0)
-		return -1;
+	interface_set_available(state->proto.iface, available);
+}
 
-	proc->pid = pid;
-	uloop_process_add(proc);
+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);
 
-	return 0;
+static void
+proto_shell_update_host_dep(struct proto_shell_dependency *dep)
+{
+	struct interface *iface = NULL;
+
+	if (dep->dep.iface)
+		goto out;
+
+	if (dep->interface[0])
+		iface = vlist_find(&interfaces, dep->interface, iface, node);
+
+	iface = interface_ip_add_target_route(&dep->host, dep->v6, iface);
+	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
@@ -66,29 +144,79 @@ proto_shell_handler(struct interface_proto_state *proto,
 {
 	struct proto_shell_state *state;
 	struct proto_shell_handler *handler;
-	struct uloop_process *proc;
-	const char *argv[6];
+	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;
+	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";
-		proc = &state->setup_task;
+		switch (state->sm) {
+		case S_IDLE:
+			action = "setup";
+			state->last_error = -1;
+			proto_shell_clear_host_dep(state);
+			state->sm = S_SETUP;
+			break;
+
+		case S_SETUP_ABORT:
+		case S_TEARDOWN:
+		case S_SETUP:
+			return 0;
+
+		default:
+			return -1;
+		}
+	} else if (cmd == PROTO_CMD_RENEW) {
+		if (!(handler->proto.flags & PROTO_FLAG_RENEW_AVAILABLE))
+			return 0;
+
+		if (state->script_task.uloop.pending) {
+			state->renew_pending = true;
+			return 0;
+		}
+
+		state->renew_pending = false;
+		action = "renew";
 	} else {
-		action = "teardown";
-		proc = &state->teardown_task;
-		if (state->setup_task.pending) {
-			uloop_timeout_set(&state->setup_timeout, 1000);
-			kill(state->setup_task.pid, SIGINT);
-			state->teardown_pending = true;
+		switch (state->sm) {
+		case S_SETUP:
+			if (state->script_task.uloop.pending) {
+				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->renew_pending = false;
+				state->sm = S_SETUP_ABORT;
+				return 0;
+			}
+		/* fall through if no script task is running */
+		case S_IDLE:
+			action = "teardown";
+			state->renew_pending = false;
+			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);
+			break;
+
+		case S_TEARDOWN:
 			return 0;
+
+		default:
+			return -1;
 		}
 	}
 
+	D(INTERFACE, "run %s for interface '%s'\n", action, proto->iface->name);
 	config = blobmsg_format_json(state->config, true);
 	if (!config)
 		return -1;
@@ -101,43 +229,134 @@ proto_shell_handler(struct interface_proto_state *proto,
 	if (proto->iface->main_dev.dev)
 		argv[i++] = proto->iface->main_dev.dev->ifname;
 	argv[i] = NULL;
+	envp[j] = NULL;
 
-	ret = run_script(argv, proc);
+	ret = netifd_start_process(argv, envp, proc);
 	free(config);
 
 	return ret;
 }
 
 static void
-proto_shell_setup_timeout_cb(struct uloop_timeout *timeout)
+proto_shell_if_up_cb(struct interface_user *dep, struct interface *iface,
+		     enum interface_event ev)
 {
-	struct proto_shell_state *state;
+	struct proto_shell_dependency *pdep;
+
+	if (ev != IFEV_UP && ev != IFEV_UPDATE)
+		return;
 
-	state = container_of(timeout, struct proto_shell_state, setup_timeout);
-	kill(state->setup_task.pid, SIGKILL);
+	pdep = container_of(dep, struct proto_shell_dependency, dep);
+	proto_shell_update_host_dep(pdep);
 }
 
 static void
-proto_shell_setup_cb(struct uloop_process *p, int ret)
+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;
 
-	state = container_of(p, struct proto_shell_state, setup_task);
-	uloop_timeout_cancel(&state->setup_timeout);
-	if (state->teardown_pending) {
-		state->teardown_pending = 0;
+	if (ev == IFEV_UP || ev == IFEV_UPDATE)
+		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_teardown_cb(struct uloop_process *p, int ret)
+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);
+		else if (task == &state->script_task) {
+			if (state->renew_pending)
+				proto_shell_handler(&state->proto,
+						    PROTO_CMD_RENEW, false);
+			else if (!state->handler->no_proto_task &&
+				 !state->proto_task.uloop.pending &&
+				 state->sm == S_SETUP)
+				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(p, struct proto_shell_state, teardown_task);
-	state->proto.proto_event(&state->proto, IFPEV_DOWN);
-	device_remove_user(&state->l3_dev);
+	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
@@ -146,280 +365,489 @@ 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 },
 };
 
 static int
-proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
+proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
 {
-	struct proto_shell_state *state;
-	struct blob_attr *tb[__NOTIFY_LAST];
+	struct interface *iface = state->proto.iface;
+	struct blob_attr *cur;
+	struct device *dev;
+	const char *devname;
+	int dev_create = 1;
+	bool addr_ext = false;
+	bool keep = false;
 	bool up;
 
-	state = container_of(proto, struct proto_shell_state, proto);
+	if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
+		return UBUS_STATUS_PERMISSION_DENIED;
 
-	blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
 	if (!tb[NOTIFY_LINK_UP])
 		return UBUS_STATUS_INVALID_ARGUMENT;
 
 	up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
-	if (up) {
-		if (!tb[NOTIFY_IFNAME])
+	if (!up) {
+		state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+		return 0;
+	}
+
+	if ((cur = tb[NOTIFY_KEEP]) != NULL)
+		keep = blobmsg_get_bool(cur);
+
+	if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
+		addr_ext = blobmsg_get_bool(cur);
+		if (addr_ext)
+			dev_create = 2;
+	}
+
+	if (iface->state != IFS_UP || !iface->l3_dev.dev)
+		keep = false;
+
+	if (!keep) {
+		dev = iface->main_dev.dev;
+		if (tb[NOTIFY_IFNAME]) {
+			keep = false;
+			devname = blobmsg_data(tb[NOTIFY_IFNAME]);
+			if (tb[NOTIFY_TUNNEL])
+				dev = proto_shell_create_tunnel(devname, tb[NOTIFY_TUNNEL]);
+			else
+				dev = device_get(devname, dev_create);
+		}
+
+		if (!dev)
 			return UBUS_STATUS_INVALID_ARGUMENT;
 
-		device_add_user(&state->l3_dev,
-			device_get(blobmsg_data(tb[NOTIFY_IFNAME]), true));
-		device_claim(&state->l3_dev);
-		state->proto.iface->l3_dev = &state->l3_dev;
-		state->proto.proto_event(&state->proto, IFPEV_UP);
-	} else {
-		state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+		interface_set_l3_dev(iface, dev);
+		if (device_claim(&iface->l3_dev) < 0)
+			return UBUS_STATUS_UNKNOWN_ERROR;
+
+		device_set_present(dev, true);
+
+		interface_update_start(iface);
+	}
+
+	proto_apply_ip_settings(iface, data, addr_ext);
+
+	if ((cur = tb[NOTIFY_ROUTES]) != NULL)
+		proto_shell_parse_route_list(state->proto.iface, cur, false);
+
+	if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
+		proto_shell_parse_route_list(state->proto.iface, cur, true);
+
+	if ((cur = tb[NOTIFY_DNS]))
+		interface_add_dns_server_list(&iface->proto_ip, cur);
+
+	if ((cur = tb[NOTIFY_DNS_SEARCH]))
+		interface_add_dns_search_list(&iface->proto_ip, cur);
+
+	if ((cur = tb[NOTIFY_DATA]))
+		proto_shell_parse_data(state->proto.iface, cur);
+
+	interface_update_complete(state->proto.iface);
+
+	if ((state->sm != S_SETUP_ABORT) && (state->sm != S_TEARDOWN)) {
+		if (!keep)
+			state->proto.proto_event(&state->proto, IFPEV_UP);
+		state->sm = S_IDLE;
 	}
 
 	return 0;
 }
 
-struct interface_proto_state *
-proto_shell_attach(const struct proto_handler *h, struct interface *iface,
-		   struct blob_attr *attr)
+static bool
+fill_string_list(struct blob_attr *attr, char **argv, int max)
 {
-	struct proto_shell_state *state;
+	struct blob_attr *cur;
+	int argc = 0;
+	int rem;
 
-	state = calloc(1, sizeof(*state));
-	state->config = malloc(blob_pad_len(attr));
-	if (!state->config)
-		goto error;
+	if (!attr)
+		goto out;
 
-	memcpy(state->config, attr, blob_pad_len(attr));
-	state->proto.free = proto_shell_free;
-	state->proto.notify = proto_shell_notify;
-	state->proto.cb = proto_shell_handler;
-	state->setup_timeout.cb = proto_shell_setup_timeout_cb;
-	state->setup_task.cb = proto_shell_setup_cb;
-	state->teardown_task.cb = proto_shell_teardown_cb;
-	state->handler = container_of(h, struct proto_shell_handler, proto);
+	blobmsg_for_each_attr(cur, attr, rem) {
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+			return false;
 
-	return &state->proto;
+		if (!blobmsg_check_attr(cur, NULL))
+			return false;
 
-error:
-	free(state);
-	return NULL;
+		argv[argc++] = blobmsg_data(cur);
+		if (argc == max - 1)
+			return false;
+	}
+
+out:
+	argv[argc] = NULL;
+	return true;
 }
 
-static json_object *
-check_type(json_object *obj, json_type type)
+static int
+proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
 {
-	if (!obj)
-		return NULL;
+	static char *argv[64];
+	static char *env[32];
+
+	if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
+		return UBUS_STATUS_PERMISSION_DENIED;
+
+	if (!tb[NOTIFY_COMMAND])
+		goto error;
+
+	if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
+		goto error;
+
+	if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
+		goto error;
+
+	netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
 
-	if (json_object_get_type(obj) != type)
-		return NULL;
+	return 0;
 
-	return obj;
+error:
+	return UBUS_STATUS_INVALID_ARGUMENT;
 }
 
-static inline json_object *
-get_field(json_object *obj, const char *name, json_type type)
+static int
+proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
 {
-	return check_type(json_object_object_get(obj, name), type);
+	unsigned int signal = ~0;
+
+	if (tb[NOTIFY_SIGNAL])
+		signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
+
+	if (signal > 31)
+		signal = SIGTERM;
+
+	if (state->proto_task.uloop.pending) {
+		if (signal == SIGTERM || signal == SIGKILL)
+			state->proto_task_killed = true;
+		kill(state->proto_task.uloop.pid, signal);
+	}
+
+	return 0;
 }
 
-static char *
-proto_shell_parse_config(struct config_param_list *config, json_object *obj)
+static int
+proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
 {
-	struct blobmsg_policy *attrs;
-	char *str_buf, *str_cur;
-	int str_len = 0;
-	int i;
-
-	attrs = calloc(1, sizeof(*attrs));
-	if (!attrs)
-		return NULL;
-
-	config->n_params = json_object_array_length(obj);
-	config->params = attrs;
-	for (i = 0; i < config->n_params; i++) {
-		json_object *cur, *name, *type;
-
-		cur = check_type(json_object_array_get_idx(obj, i), json_type_array);
-		if (!cur)
-			goto error;
+	struct blob_attr *cur;
+	char *data[16];
+	int n_data = 0;
+	int rem;
 
-		name = check_type(json_object_array_get_idx(cur, 0), json_type_string);
-		if (!name)
+	if (!tb[NOTIFY_ERROR])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
+		if (n_data + 1 == ARRAY_SIZE(data))
 			goto error;
 
-		type = check_type(json_object_array_get_idx(cur, 1), json_type_int);
-		if (!type)
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 			goto error;
 
-		attrs[i].name = json_object_get_string(name);
-		attrs[i].type = json_object_get_int(type);
-		if (attrs[i].type > BLOBMSG_TYPE_LAST)
+		if (!blobmsg_check_attr(cur, NULL))
 			goto error;
 
-		str_len += strlen(attrs[i].name + 1);
+		data[n_data++] = blobmsg_data(cur);
 	}
 
-	str_buf = malloc(str_len);
-	if (!str_buf)
+	if (!n_data)
 		goto error;
 
-	str_cur = str_buf;
-	for (i = 0; i < config->n_params; i++) {
-		const char *name = attrs[i].name;
-
-		attrs[i].name = str_cur;
-		str_cur += sprintf(str_cur, "%s", name) + 1;
-	}
+	interface_add_error(state->proto.iface, state->handler->proto.name,
+			data[0], (const char **) &data[1], n_data - 1);
 
-	return str_buf;
+	return 0;
 
 error:
-	free(attrs);
-	config->n_params = 0;
-	return NULL;
+	return UBUS_STATUS_INVALID_ARGUMENT;
 }
 
-static void
-proto_shell_add_handler(const char *script, json_object *obj)
+static int
+proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
 {
-	struct proto_shell_handler *handler;
-	struct proto_handler *proto;
-	json_object *config, *tmp;
-	const char *name;
-	char *str;
+	state->proto.iface->autostart = false;
+	return 0;
+}
 
-	if (!check_type(obj, json_type_object))
-		return;
+static int
+proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	if (!tb[NOTIFY_AVAILABLE])
+		return UBUS_STATUS_INVALID_ARGUMENT;
 
-	tmp = get_field(obj, "name", json_type_string);
-	if (!tmp)
-		return;
+	interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
+	return 0;
+}
 
-	name = json_object_get_string(tmp);
+static int
+proto_shell_add_host_dependency(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	struct proto_shell_dependency *dep;
+	struct blob_attr *host = tb[NOTIFY_HOST];
+	struct blob_attr *ifname_a = tb[NOTIFY_IFNAME];
+	const char *ifname_str = ifname_a ? blobmsg_data(ifname_a) : "";
+	char *ifname;
 
-	handler = calloc(1, sizeof(*handler) +
-			 strlen(script) + 1 +
-			 strlen(name) + 1);
-	if (!handler)
-		return;
+	if (state->sm == S_TEARDOWN || state->sm == S_SETUP_ABORT)
+		return UBUS_STATUS_PERMISSION_DENIED;
 
-	strcpy(handler->script_name, script);
+	if (!host)
+		return UBUS_STATUS_INVALID_ARGUMENT;
 
-	str = handler->script_name + strlen(handler->script_name) + 1;
-	strcpy(str, name);
+	dep = calloc_a(sizeof(*dep), &ifname, strlen(ifname_str) + 1);
+	if (inet_pton(AF_INET, blobmsg_data(host), &dep->host) < 1) {
+		if (inet_pton(AF_INET6, blobmsg_data(host), &dep->host) < 1) {
+			free(dep);
+			return UBUS_STATUS_INVALID_ARGUMENT;
+		} else {
+			dep->v6 = true;
+		}
+	}
 
-	proto = &handler->proto;
-	proto->name = str;
-	proto->config_params = &handler->config;
-	proto->attach = proto_shell_attach;
+	dep->proto = state;
+	dep->interface = strcpy(ifname, ifname_str);
 
-	tmp = get_field(obj, "no-device", json_type_boolean);
-	if (tmp && json_object_get_boolean(tmp))
-		handler->proto.flags |= PROTO_FLAG_NODEV;
+	dep->dep.cb = proto_shell_if_up_cb;
+	interface_add_user(&dep->dep, NULL);
+	list_add(&dep->list, &state->deps);
+	proto_shell_update_host_dep(dep);
+	if (!dep->dep.iface)
+		return UBUS_STATUS_NOT_FOUND;
 
-	config = get_field(obj, "config", json_type_array);
-	if (config)
-		handler->config_buf = proto_shell_parse_config(&handler->config, config);
+	return 0;
+}
 
-	DPRINTF("Add handler for script %s: %s\n", script, proto->name);
-	add_proto_handler(proto);
+static int
+proto_shell_setup_failed(struct proto_shell_state *state)
+{
+	int ret = 0;
+
+	switch (state->sm) {
+	case S_IDLE:
+		state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+		/* fall through */
+	case S_SETUP:
+		proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
+		break;
+	case S_SETUP_ABORT:
+	case S_TEARDOWN:
+	default:
+		ret = UBUS_STATUS_PERMISSION_DENIED;
+		break;
+	}
+	return ret;
 }
 
-static void proto_shell_add_script(const char *name)
+static int
+proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 {
-	struct json_tokener *tok = NULL;
-	json_object *obj;
-	static char buf[512];
-	char *start, *end, *cmd;
-	FILE *f;
-	int buflen, len;
+	struct proto_shell_state *state;
+	struct blob_attr *tb[__NOTIFY_LAST];
 
-#define DUMP_SUFFIX	" '' dump"
+	state = container_of(proto, struct proto_shell_state, proto);
 
-	cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
-	sprintf(cmd, "%s" DUMP_SUFFIX, name);
+	blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
+	if (!tb[NOTIFY_ACTION])
+		return UBUS_STATUS_INVALID_ARGUMENT;
 
-	f = popen(cmd, "r");
-	if (!f)
-		return;
+	switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
+	case 0:
+		return proto_shell_update_link(state, attr, tb);
+	case 1:
+		return proto_shell_run_command(state, tb);
+	case 2:
+		return proto_shell_kill_command(state, tb);
+	case 3:
+		return proto_shell_notify_error(state, tb);
+	case 4:
+		return proto_shell_block_restart(state, tb);
+	case 5:
+		return proto_shell_set_available(state, tb);
+	case 6:
+		return proto_shell_add_host_dependency(state, tb);
+	case 7:
+		return proto_shell_setup_failed(state);
+	default:
+		return UBUS_STATUS_INVALID_ARGUMENT;
+	}
+}
 
-	do {
-		buflen = fread(buf, 1, sizeof(buf) - 1, f);
-		if (buflen <= 0)
-			continue;
+static struct interface_proto_state *
+proto_shell_attach(const struct proto_handler *h, struct interface *iface,
+		   struct blob_attr *attr)
+{
+	struct proto_shell_state *state;
 
-		start = buf;
-		len = buflen;
-		do {
-			end = memchr(start, '\n', len);
-			if (end)
-				len = end - start;
-
-			if (!tok)
-				tok = json_tokener_new();
-
-			obj = json_tokener_parse_ex(tok, start, len);
-			if (!is_error(obj)) {
-				proto_shell_add_handler(name, obj);
-				json_object_put(obj);
-				json_tokener_free(tok);
-				tok = NULL;
-			}
+	state = calloc(1, sizeof(*state));
+	INIT_LIST_HEAD(&state->deps);
 
-			if (end) {
-				start = end + 1;
-				len = buflen - (start - buf);
-			}
-		} while (len > 0);
-	} while (!feof(f) && !ferror(f));
+	state->config = malloc(blob_pad_len(attr));
+	if (!state->config)
+		goto error;
 
-	if (tok)
-		json_tokener_free(tok);
+	memcpy(state->config, attr, blob_pad_len(attr));
+	state->proto.free = proto_shell_free;
+	state->proto.notify = proto_shell_notify;
+	state->proto.cb = proto_shell_handler;
+	state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
+	state->script_task.cb = proto_shell_script_cb;
+	state->script_task.dir_fd = proto_fd;
+	state->script_task.log_prefix = iface->name;
+	state->proto_task.cb = proto_shell_task_cb;
+	state->proto_task.dir_fd = proto_fd;
+	state->proto_task.log_prefix = iface->name;
+	state->handler = container_of(h, struct proto_shell_handler, proto);
 
-	pclose(f);
+	return &state->proto;
+
+error:
+	free(state);
+	return NULL;
 }
 
-void __init proto_shell_init(void)
+static void
+proto_shell_add_handler(const char *script, const char *name, json_object *obj)
 {
-	glob_t g;
-	int main_fd;
-	int i;
+	struct proto_shell_handler *handler;
+	struct proto_handler *proto;
+	json_object *config, *tmp;
+	char *proto_name, *script_name;
 
-	main_fd = open(".", O_RDONLY | O_DIRECTORY);
-	if (main_fd < 0)
+	handler = calloc_a(sizeof(*handler),
+			   &proto_name, strlen(name) + 1,
+			   &script_name, strlen(script) + 1);
+	if (!handler)
 		return;
 
-	if (chdir(main_path)) {
-		perror("chdir(main path)");
-		goto close_cur;
-	}
+	handler->script_name = strcpy(script_name, script);
 
-	if (chdir("./proto"))
-		goto close_cur;
+	proto = &handler->proto;
+	proto->name = strcpy(proto_name, name);
+	proto->config_params = &handler->config;
+	proto->attach = proto_shell_attach;
 
-	proto_fd = open(".", O_RDONLY | O_DIRECTORY);
-	if (proto_fd < 0)
-		goto close_cur;
+	tmp = json_get_field(obj, "no-device", json_type_boolean);
+	if (tmp && json_object_get_boolean(tmp))
+		handler->proto.flags |= PROTO_FLAG_NODEV;
 
-	glob("./*.sh", 0, NULL, &g);
-	for (i = 0; i < g.gl_pathc; i++)
-		proto_shell_add_script(g.gl_pathv[i]);
+	tmp = json_get_field(obj, "no-proto-task", json_type_boolean);
+	handler->no_proto_task = tmp && json_object_get_boolean(tmp);
+
+	tmp = json_get_field(obj, "available", json_type_boolean);
+	if (tmp && json_object_get_boolean(tmp))
+		handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
+
+	tmp = json_get_field(obj, "renew-handler", json_type_boolean);
+	if (tmp && json_object_get_boolean(tmp))
+		handler->proto.flags |= PROTO_FLAG_RENEW_AVAILABLE;
+
+	tmp = json_get_field(obj, "lasterror", json_type_boolean);
+	if (tmp && json_object_get_boolean(tmp))
+		handler->proto.flags |= PROTO_FLAG_LASTERROR;
+
+	config = json_get_field(obj, "config", json_type_array);
+	if (config)
+		handler->config_buf = netifd_handler_parse_config(&handler->config, config);
+
+	DPRINTF("Add handler for script %s: %s\n", script, proto->name);
+	add_proto_handler(proto);
+}
+
+void proto_shell_init(void)
+{
+	proto_fd = netifd_open_subdir("proto");
+	if (proto_fd < 0)
+		return;
 
-close_cur:
-	fchdir(main_fd);
-	close(main_fd);
+	netifd_init_script_handlers(proto_fd, proto_shell_add_handler);
 }