X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=proto.c;h=c3bd19de8e4af478c5a7e47b20d163cd913de34e;hp=287eae5f95fe2f807e54a26b51b192e786f72323;hb=120cd39654a33401423f1b65bb19e12681a6e46f;hpb=aa76c9ee78146f97512f96524d3abb94210040a5

diff --git a/proto.c b/proto.c
index 287eae5..c3bd19d 100644
--- a/proto.c
+++ b/proto.c
@@ -1,11 +1,401 @@
+/*
+ * 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.
+ */
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
 
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
 #include "netifd.h"
 #include "interface.h"
+#include "interface-ip.h"
 #include "proto.h"
 
+static struct avl_tree handlers;
+
+enum {
+	OPT_IPADDR,
+	OPT_IP6ADDR,
+	OPT_NETMASK,
+	OPT_BROADCAST,
+	OPT_GATEWAY,
+	OPT_IP6GW,
+	__OPT_MAX,
+};
+
+static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
+	[OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
+	[OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
+	[OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
+	[OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
+	[OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
+	[OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
+};
+
+static const union config_param_info proto_ip_attr_info[__OPT_MAX] = {
+	[OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
+	[OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
+};
+
+const struct config_param_list proto_ip_attr = {
+	.n_params = __OPT_MAX,
+	.params = proto_ip_attributes,
+	.info = proto_ip_attr_info,
+};
+
+enum {
+	ADDR_IPADDR,
+	ADDR_MASK,
+	ADDR_BROADCAST,
+	ADDR_PTP,
+	__ADDR_MAX
+};
+
+static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
+	[ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
+	[ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
+	[ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
+	[ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
+};
+
+unsigned int
+parse_netmask_string(const char *str, bool v6)
+{
+	struct in_addr addr;
+	unsigned int ret;
+	char *err = NULL;
+
+	if (!strchr(str, '.')) {
+		ret = strtoul(str, &err, 0);
+		if (err && *err)
+			goto error;
+
+		return ret;
+	}
+
+	if (v6)
+		goto error;
+
+	if (inet_aton(str, &addr) != 1)
+		goto error;
+
+	return 32 - fls(~(ntohl(addr.s_addr)));
+
+error:
+	return ~0;
+}
+
+static bool
+split_netmask(char *str, unsigned int *netmask, bool v6)
+{
+	char *delim = strchr(str, '/');
+
+	if (delim) {
+		*(delim++) = 0;
+
+		*netmask = parse_netmask_string(delim, v6);
+	}
+	return true;
+}
+
+static int
+parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
+{
+	char *astr = alloca(strlen(str) + 1);
+
+	strcpy(astr, str);
+	if (!split_netmask(astr, netmask, af == AF_INET6))
+		return 0;
+
+	if (af == AF_INET6) {
+		if (*netmask > 128)
+			return 0;
+	} else {
+		if (*netmask > 32)
+			return 0;
+	}
+
+	return inet_pton(af, astr, addr);
+}
+
+static struct device_addr *
+alloc_device_addr(bool v6, bool ext)
+{
+	struct device_addr *addr;
+
+	addr = calloc(1, sizeof(*addr));
+	addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
+	if (ext)
+		addr->flags |= DEVADDR_EXTERNAL;
+
+	return addr;
+}
+
+static bool
+parse_addr(struct interface *iface, const char *str, bool v6, int mask,
+	   bool ext, uint32_t broadcast)
+{
+	struct device_addr *addr;
+	int af = v6 ? AF_INET6 : AF_INET;
+
+	addr = alloc_device_addr(v6, ext);
+	if (!addr)
+		return false;
+
+	addr->mask = mask;
+	if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask)) {
+		interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
+		free(addr);
+		return false;
+	}
+
+	if (broadcast)
+		addr->broadcast = broadcast;
+
+	vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
+	return true;
+}
+
+static int
+parse_static_address_option(struct interface *iface, struct blob_attr *attr,
+			    bool v6, int netmask, bool ext, uint32_t broadcast)
+{
+	struct blob_attr *cur;
+	int n_addr = 0;
+	int rem;
+
+	blobmsg_for_each_attr(cur, attr, rem) {
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+			return -1;
+
+		n_addr++;
+		if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
+				broadcast))
+			return -1;
+	}
+
+	return n_addr;
+}
+
+static struct device_addr *
+parse_address_item(struct blob_attr *attr, bool v6, bool ext)
+{
+	struct device_addr *addr;
+	struct blob_attr *tb[__ADDR_MAX];
+	struct blob_attr *cur;
+
+	if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
+		return NULL;
+
+	addr = alloc_device_addr(v6, ext);
+	if (!addr)
+		return NULL;
+
+	blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
+
+	addr->mask = v6 ? 128 : 32;
+	if ((cur = tb[ADDR_MASK])) {
+		unsigned int new_mask;
+
+		new_mask = parse_netmask_string(blobmsg_data(cur), v6);
+		if (new_mask > addr->mask)
+			goto error;
+
+		addr->mask = new_mask;
+	}
+
+	cur = tb[ADDR_IPADDR];
+	if (!cur)
+		goto error;
+
+	if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
+		goto error;
+
+	if (!v6) {
+		if ((cur = tb[ADDR_BROADCAST]) &&
+		    !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
+			goto error;
+		if ((cur = tb[ADDR_PTP]) &&
+		    !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
+			goto error;
+	}
+
+	return addr;
+
+error:
+	free(addr);
+	return NULL;
+}
+
+static int
+parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
+		   bool ext)
+{
+	struct device_addr *addr;
+	struct blob_attr *cur;
+	int n_addr = 0;
+	int rem;
+
+	blobmsg_for_each_attr(cur, attr, rem) {
+		addr = parse_address_item(cur, v6, ext);
+		if (!addr)
+			return -1;
+
+		n_addr++;
+		vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
+	}
+
+	return n_addr;
+}
+
+static bool
+parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
+{
+	struct device_route *route;
+	const char *str = blobmsg_data(attr);
+	int af = v6 ? AF_INET6 : AF_INET;
+
+	route = calloc(1, sizeof(*route));
+	if (!inet_pton(af, str, &route->nexthop)) {
+		interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
+		free(route);
+		return false;
+	}
+
+	route->mask = 0;
+	route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
+	vlist_add(&iface->proto_ip.route, &route->node, &route->flags);
+
+	return true;
+}
+
+int
+proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
+{
+	struct blob_attr *tb[__OPT_MAX];
+	struct blob_attr *cur;
+	const char *error;
+	unsigned int netmask = 32;
+	int n_v4 = 0, n_v6 = 0;
+	struct in_addr bcast = {};
+
+	blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
+
+	if ((cur = tb[OPT_NETMASK])) {
+		netmask = parse_netmask_string(blobmsg_data(cur), false);
+		if (netmask > 32) {
+			error = "INVALID_NETMASK";
+			goto error;
+		}
+	}
+
+	if ((cur = tb[OPT_BROADCAST])) {
+		if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
+			error = "INVALID_BROADCAST";
+			goto error;
+		}
+	}
+
+	if ((cur = tb[OPT_IPADDR]))
+		n_v4 = parse_static_address_option(iface, cur, false,
+			netmask, false, bcast.s_addr);
+
+	if ((cur = tb[OPT_IP6ADDR]))
+		n_v6 = parse_static_address_option(iface, cur, true,
+			netmask, false, 0);
+
+	if (!n_v4 && !n_v6) {
+		error = "NO_ADDRESS";
+		goto error;
+	}
+
+	if (n_v4 < 0 || n_v6 < 0)
+		goto out;
+
+	if ((cur = tb[OPT_GATEWAY])) {
+		if (n_v4 && !parse_gateway_option(iface, cur, false))
+			goto out;
+	}
+
+	if ((cur = tb[OPT_IP6GW])) {
+		if (n_v6 && !parse_gateway_option(iface, cur, true))
+			goto out;
+	}
+
+	return 0;
+
+error:
+	interface_add_error(iface, "proto", error, NULL, 0);
+out:
+	return -1;
+}
+
+int
+proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
+{
+	struct blob_attr *tb[__OPT_MAX];
+	struct blob_attr *cur;
+	const char *error;
+	int n_v4 = 0, n_v6 = 0;
+
+	blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
+
+	if ((cur = tb[OPT_IPADDR]))
+		n_v4 = parse_address_list(iface, cur, false, ext);
+
+	if ((cur = tb[OPT_IP6ADDR]))
+		n_v6 = parse_address_list(iface, cur, true, ext);
+
+	if (!n_v4 && !n_v6) {
+		error = "NO_ADDRESS";
+		goto error;
+	}
+
+	if (n_v4 < 0 || n_v6 < 0)
+		goto out;
+
+	if ((cur = tb[OPT_GATEWAY])) {
+		if (n_v4 && !parse_gateway_option(iface, cur, false))
+			goto out;
+	}
+
+	if ((cur = tb[OPT_IP6GW])) {
+		if (n_v6 && !parse_gateway_option(iface, cur, true))
+			goto out;
+	}
+
+	return 0;
+
+error:
+	interface_add_error(iface, "proto", error, NULL, 0);
+out:
+	return -1;
+}
+
+void add_proto_handler(struct proto_handler *p)
+{
+	if (!handlers.comp)
+		avl_init(&handlers, avl_strcmp, false, NULL);
+
+	if (p->avl.key)
+		return;
+
+	p->avl.key = p->name;
+	avl_insert(&handlers, &p->avl);
+}
+
 static void
 default_proto_free(struct interface_proto_state *proto)
 {
@@ -13,31 +403,110 @@ default_proto_free(struct interface_proto_state *proto)
 }
 
 static int
-default_proto_handler(struct interface_proto_state *proto,
+invalid_proto_handler(struct interface_proto_state *proto,
+		      enum interface_proto_cmd cmd, bool force)
+{
+	return -1;
+}
+
+static int
+no_proto_handler(struct interface_proto_state *proto,
+		 enum interface_proto_cmd cmd, bool force)
+{
+	return 0;
+}
+
+static struct interface_proto_state *
+default_proto_attach(const struct proto_handler *h,
+		     struct interface *iface, struct blob_attr *attr)
+{
+	struct interface_proto_state *proto;
+
+	proto = calloc(1, sizeof(*proto));
+	proto->free = default_proto_free;
+	proto->cb = no_proto_handler;
+
+	return proto;
+}
+
+static const struct proto_handler no_proto = {
+	.name = "none",
+	.flags = PROTO_FLAG_IMMEDIATE,
+	.attach = default_proto_attach,
+};
+
+static const struct proto_handler *
+get_proto_handler(const char *name)
+{
+	struct proto_handler *proto;
+
+	if (!strcmp(name, "none"))
+	    return &no_proto;
+
+	if (!handlers.comp)
+		return NULL;
+
+	return avl_find_element(&handlers, name, proto, avl);
+}
+
+void
+proto_init_interface(struct interface *iface, struct blob_attr *attr)
+{
+	const struct proto_handler *proto = iface->proto_handler;
+	struct interface_proto_state *state = NULL;
+
+	if (!proto)
+		proto = &no_proto;
+
+	state = proto->attach(proto, iface, attr);
+	if (!state) {
+		state = no_proto.attach(&no_proto, iface, attr);
+		state->cb = invalid_proto_handler;
+	}
+
+	state->handler = proto;
+	interface_set_proto_state(iface, state);
+}
+
+void
+proto_attach_interface(struct interface *iface, const char *proto_name)
+{
+	const struct proto_handler *proto = &no_proto;
+
+	if (proto_name) {
+		proto = get_proto_handler(proto_name);
+		if (!proto) {
+			interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
+			proto = &no_proto;
+		}
+	}
+
+	iface->proto_handler = proto;
+}
+
+int
+interface_proto_event(struct interface_proto_state *proto,
 		      enum interface_proto_cmd cmd, bool force)
 {
-	enum interface_event ev;
+	enum interface_proto_event ev;
+	int ret;
+
+	ret = proto->cb(proto, cmd, force);
+	if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
+		goto out;
 
 	switch(cmd) {
 	case PROTO_CMD_SETUP:
-		ev = IFEV_UP;
+		ev = IFPEV_UP;
 		break;
 	case PROTO_CMD_TEARDOWN:
-		ev = IFEV_DOWN;
+		ev = IFPEV_DOWN;
 		break;
 	default:
 		return -EINVAL;
 	}
 	proto->proto_event(proto, ev);
-	return 0;
-}
-
-struct interface_proto_state *get_default_proto(void)
-{
-	struct interface_proto_state *proto;
 
-	proto = calloc(1, sizeof(*proto));
-	proto->handler = default_proto_handler;
-	proto->free = default_proto_free;
-	return proto;
+out:
+	return ret;
 }