X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=proto-shell.c;h=2317209b2442c8619adc7ed1a62f6eb87234a11f;hp=5937e522818cee0c7b2385920ce8fc72023b5598;hb=e7ac4074bf497cd19e38adbb49e2b3eb275eeb05;hpb=d43eb8e1fd680fc14c398150665cf3a954fe5510

diff --git a/proto-shell.c b/proto-shell.c
index 5937e52..2317209 100644
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -1,3 +1,18 @@
+/*
+ * 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>
@@ -16,50 +31,106 @@
 #include "interface-ip.h"
 #include "proto.h"
 
-static int proto_fd;
+static struct netifd_fd proto_fd;
+
+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;
+	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 device_user l3_dev;
+	struct uloop_timeout teardown_timeout;
 
-	struct uloop_timeout setup_timeout;
-	struct uloop_process setup_task;
-	struct uloop_process teardown_task;
-	bool teardown_pending;
+	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 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;
+
+	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
@@ -68,27 +139,44 @@ 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;
+		state->last_error = -1;
+		proto_shell_clear_host_dep(state);
 	} 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;
+		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);
@@ -103,143 +191,136 @@ 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)
+		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 = false;
+	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_teardown_cb(struct uloop_process *p, int ret)
+proto_shell_task_finish(struct proto_shell_state *state,
+			struct netifd_process *task)
 {
-	struct proto_shell_state *state;
+	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;
+		}
 
-	state = container_of(p, struct proto_shell_state, teardown_task);
-	state->proto.proto_event(&state->proto, IFPEV_DOWN);
-	if (state->l3_dev.dev)
-		device_remove_user(&state->l3_dev);
+		uloop_timeout_cancel(&state->teardown_timeout);
+		state->sm = S_IDLE;
+		state->proto.proto_event(&state->proto, IFPEV_DOWN);
+		break;
+	}
 }
 
 static void
-proto_shell_free(struct interface_proto_state *proto)
+proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
 {
 	struct proto_shell_state *state;
 
-	state = container_of(proto, struct proto_shell_state, proto);
-	free(state->config);
-	free(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_parse_addr_list(struct interface *iface, struct blob_attr *attr,
-			    bool v6, bool external)
+proto_shell_script_cb(struct netifd_process *p, int ret)
 {
-	struct device_addr *addr;
-	struct blob_attr *cur;
-	int rem;
-
-	blobmsg_for_each_attr(cur, attr, rem) {
-		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING) {
-			DPRINTF("Ignore wrong address type: %d\n", blobmsg_type(cur));
-			continue;
-		}
-
-		addr = proto_parse_ip_addr_string(blobmsg_data(cur), v6, v6 ? 32 : 128);
-		if (!addr) {
-			DPRINTF("Failed to parse IP address string: %s\n", (char *) blobmsg_data(cur));
-			continue;
-		}
-
-		if (external)
-			addr->flags |= DEVADDR_EXTERNAL;
+	struct proto_shell_state *state;
 
-		vlist_add(&iface->proto_addr, &addr->node);
-	}
+	state = container_of(p, struct proto_shell_state, script_task);
+	proto_shell_task_finish(state, p);
 }
 
-enum {
-	ROUTE_TARGET,
-	ROUTE_MASK,
-	ROUTE_GATEWAY,
-	ROUTE_DEVICE,
-	__ROUTE_LAST
-};
-
-static const struct blobmsg_policy route_attr[__ROUTE_LAST] = {
-	[ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
-	[ROUTE_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_INT32 },
-	[ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
-	[ROUTE_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
-};
-
 static void
-parse_route(struct interface *iface, struct blob_attr *attr, bool v6)
+proto_shell_task_cb(struct netifd_process *p, int ret)
 {
-	struct blob_attr *tb[__ROUTE_LAST], *cur;
-	struct device_route *route;
-	int af = v6 ? AF_INET6 : AF_INET;
-
-	blobmsg_parse(route_attr, __ROUTE_LAST, tb, blobmsg_data(attr), blobmsg_data_len(attr));
-
-	if (!tb[ROUTE_GATEWAY] && !tb[ROUTE_DEVICE])
-		return;
-
-	route = calloc(1, sizeof(*route));
-	if (!route)
-		return;
+	struct proto_shell_state *state;
 
-	route->mask = v6 ? 128 : 32;
-	if ((cur = tb[ROUTE_MASK]) != NULL) {
-		route->mask = blobmsg_get_u32(cur);
-		if (route->mask > v6 ? 128 : 32)
-			goto error;
-	}
+	state = container_of(p, struct proto_shell_state, proto_task);
 
-	if ((cur = tb[ROUTE_TARGET]) != NULL) {
-		if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
-			DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
-			goto error;
-		}
-	}
+	if (state->sm == S_IDLE || state->sm == S_SETUP)
+		state->last_error = WEXITSTATUS(ret);
 
-	if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
-		if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
-			DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
-			goto error;
-		}
-	}
-
-	if ((cur = tb[ROUTE_DEVICE]) != NULL)
-		route->device = device_get(blobmsg_data(cur), true);
+	proto_shell_task_finish(state, p);
+}
 
-	vlist_add(&iface->proto_route, &route->node);
-	return;
+static void
+proto_shell_free(struct interface_proto_state *proto)
+{
+	struct proto_shell_state *state;
 
-error:
-	free(route);
+	state = container_of(proto, struct proto_shell_state, proto);
+	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
@@ -255,70 +336,131 @@ proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
 			continue;
 		}
 
-		parse_route(iface, cur, v6);
+		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_IPADDR,
-	NOTIFY_IP6ADDR,
 	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_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
-	[NOTIFY_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
 	[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], *cur;
+	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);
-
-	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])
-			return UBUS_STATUS_INVALID_ARGUMENT;
-
-		if (!state->l3_dev.dev) {
-			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 {
+	if (!up) {
 		state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+		return 0;
 	}
 
-	if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL)
+	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 (!tb[NOTIFY_IFNAME]) {
+		if (!iface->main_dev.dev)
+			return UBUS_STATUS_INVALID_ARGUMENT;
+	} else if (!keep || iface->state != IFS_UP) {
+		keep = false;
+		devname = blobmsg_data(tb[NOTIFY_IFNAME]);
+		if (tb[NOTIFY_TUNNEL]) {
+			dev = proto_shell_create_tunnel(devname,
+				tb[NOTIFY_TUNNEL]);
+			if (!dev)
+				return UBUS_STATUS_INVALID_ARGUMENT;
+		} else {
+			dev = device_get(devname, dev_create);
+			if (!dev)
+				return UBUS_STATUS_NOT_FOUND;
+		}
+
+		interface_set_l3_dev(iface, dev);
+		device_claim(&iface->l3_dev);
+	}
 
-	if ((cur = tb[NOTIFY_IPADDR]) != NULL)
-		proto_shell_parse_addr_list(state->proto.iface, cur, false, addr_ext);
+	if (!keep)
+		interface_update_start(iface);
 
-	if ((cur = tb[NOTIFY_IP6ADDR]) != NULL)
-		proto_shell_parse_addr_list(state->proto.iface, cur, true, addr_ext);
+	proto_apply_ip_settings(iface, data, addr_ext);
 
 	if ((cur = tb[NOTIFY_ROUTES]) != NULL)
 		proto_shell_parse_route_list(state->proto.iface, cur, false);
@@ -326,16 +468,231 @@ proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 	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);
+
+	interface_update_complete(state->proto.iface);
+
+	if (!keep)
+		state->proto.proto_event(&state->proto, IFPEV_UP);
+	state->sm = S_IDLE;
+
+	if ((cur = tb[NOTIFY_DATA]))
+		proto_shell_parse_data(state->proto.iface, cur);
+
+	return 0;
+}
+
+static bool
+fill_string_list(struct blob_attr *attr, char **argv, int max)
+{
+	struct blob_attr *cur;
+	int argc = 0;
+	int rem;
+
+	if (!attr)
+		goto out;
+
+	blobmsg_for_each_attr(cur, attr, rem) {
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+			return false;
+
+		if (!blobmsg_check_attr(cur, NULL))
+			return false;
+
+		argv[argc++] = blobmsg_data(cur);
+		if (argc == max - 1)
+			return false;
+	}
+
+out:
+	argv[argc] = NULL;
+	return true;
+}
+
+static int
+proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	static char *argv[64];
+	static char *env[32];
+
+	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);
+
+	return 0;
+
+error:
+	return UBUS_STATUS_INVALID_ARGUMENT;
+}
+
+static int
+proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	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) {
+		state->proto_task_killed = true;
+		kill(state->proto_task.uloop.pid, signal);
+	}
+
+	return 0;
+}
+
+static int
+proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	struct blob_attr *cur;
+	char *data[16];
+	int n_data = 0;
+	int rem;
+
+	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;
+
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+			goto error;
+
+		if (!blobmsg_check_attr(cur, NULL))
+			goto error;
+
+		data[n_data++] = blobmsg_data(cur);
+	}
+
+	if (!n_data)
+		goto error;
+
+	interface_add_error(state->proto.iface, state->handler->proto.name,
+			data[0], (const char **) &data[1], n_data - 1);
+
+	return 0;
+
+error:
+	return UBUS_STATUS_INVALID_ARGUMENT;
+}
+
+static int
+proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	state->proto.iface->autostart = false;
+	return 0;
+}
+
+static int
+proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
+{
+	if (!tb[NOTIFY_AVAILABLE])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
+	return 0;
+}
+
+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];
+
+	if (!host)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	dep = calloc(1, sizeof(*dep));
+	if (!inet_pton(AF_INET, blobmsg_data(host), &dep->host)) {
+		free(dep);
+		return UBUS_STATUS_INVALID_ARGUMENT;
+	}
+
+	dep->proto = state;
+	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;
+
 	return 0;
 }
 
-struct interface_proto_state *
+static int
+proto_shell_setup_failed(struct proto_shell_state *state)
+{
+	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;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int
+proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
+{
+	struct proto_shell_state *state;
+	struct blob_attr *tb[__NOTIFY_LAST];
+
+	state = container_of(proto, struct proto_shell_state, proto);
+
+	blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
+	if (!tb[NOTIFY_ACTION])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	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;
+	}
+}
+
+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;
 
 	state = calloc(1, sizeof(*state));
+	INIT_LIST_HEAD(&state->deps);
+
 	state->config = malloc(blob_pad_len(attr));
 	if (!state->config)
 		goto error;
@@ -344,9 +701,13 @@ proto_shell_attach(const struct proto_handler *h, struct interface *iface,
 	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->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
+	state->script_task.cb = proto_shell_script_cb;
+	state->script_task.dir_fd = proto_fd.fd;
+	state->script_task.log_prefix = iface->name;
+	state->proto_task.cb = proto_shell_task_cb;
+	state->proto_task.dir_fd = proto_fd.fd;
+	state->proto_task.log_prefix = iface->name;
 	state->handler = container_of(h, struct proto_shell_handler, proto);
 
 	return &state->proto;
@@ -382,11 +743,11 @@ proto_shell_parse_config(struct config_param_list *config, json_object *obj)
 	int str_len = 0;
 	int i;
 
-	attrs = calloc(1, sizeof(*attrs));
+	config->n_params = json_object_array_length(obj);
+	attrs = calloc(1, sizeof(*attrs) * config->n_params);
 	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;
@@ -408,7 +769,7 @@ proto_shell_parse_config(struct config_param_list *config, json_object *obj)
 		if (attrs[i].type > BLOBMSG_TYPE_LAST)
 			goto error;
 
-		str_len += strlen(attrs[i].name + 1);
+		str_len += strlen(attrs[i].name) + 1;
 	}
 
 	str_buf = malloc(str_len);
@@ -469,6 +830,10 @@ proto_shell_add_handler(const char *script, json_object *obj)
 	if (tmp && json_object_get_boolean(tmp))
 		handler->proto.flags |= PROTO_FLAG_NODEV;
 
+	tmp = get_field(obj, "available", json_type_boolean);
+	if (tmp && json_object_get_boolean(tmp))
+		handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
+
 	config = get_field(obj, "config", json_type_array);
 	if (config)
 		handler->config_buf = proto_shell_parse_config(&handler->config, config);
@@ -482,9 +847,9 @@ static void proto_shell_add_script(const char *name)
 	struct json_tokener *tok = NULL;
 	json_object *obj;
 	static char buf[512];
-	char *start, *end, *cmd;
+	char *start, *cmd;
 	FILE *f;
-	int buflen, len;
+	int len;
 
 #define DUMP_SUFFIX	" '' dump"
 
@@ -496,33 +861,25 @@ static void proto_shell_add_script(const char *name)
 		return;
 
 	do {
-		buflen = fread(buf, 1, sizeof(buf) - 1, f);
-		if (buflen <= 0)
+		start = fgets(buf, sizeof(buf), f);
+		if (!start)
 			continue;
 
-		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;
-			}
+		len = strlen(start);
 
-			if (end) {
-				start = end + 1;
-				len = buflen - (start - buf);
-			}
-		} while (len > 0);
+		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;
+		} else if (start[len - 1] == '\n') {
+			json_tokener_free(tok);
+			tok = NULL;
+		}
 	} while (!feof(f) && !ferror(f));
 
 	if (tok)
@@ -531,7 +888,7 @@ static void proto_shell_add_script(const char *name)
 	pclose(f);
 }
 
-void __init proto_shell_init(void)
+static void __init proto_shell_init(void)
 {
 	glob_t g;
 	int main_fd;
@@ -549,10 +906,11 @@ void __init proto_shell_init(void)
 	if (chdir("./proto"))
 		goto close_cur;
 
-	proto_fd = open(".", O_RDONLY | O_DIRECTORY);
-	if (proto_fd < 0)
+	proto_fd.fd = open(".", O_RDONLY | O_DIRECTORY);
+	if (proto_fd.fd < 0)
 		goto close_cur;
 
+	netifd_fd_add(&proto_fd);
 	glob("./*.sh", 0, NULL, &g);
 	for (i = 0; i < g.gl_pathc; i++)
 		proto_shell_add_script(g.gl_pathv[i]);