From dca8c7133b1db463f6ae71ccc6d34cd12735daef Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 4 Sep 2011 14:33:31 +0200
Subject: [PATCH] trigger proto attach from config.c

---
 config.c       |  9 ++++++++-
 interface.c    | 14 ++++++++-----
 interface.h    |  3 ++-
 proto-static.c |  2 +-
 proto.c        | 63 +++++++++++++++++++++++++++++++---------------------------
 proto.h        |  6 +++---
 6 files changed, 57 insertions(+), 40 deletions(-)

diff --git a/config.c b/config.c
index 7ba6875..2e00364 100644
--- a/config.c
+++ b/config.c
@@ -4,6 +4,7 @@
 
 #include "netifd.h"
 #include "interface.h"
+#include "proto.h"
 
 struct uci_context *uci_ctx;
 static struct uci_package *uci_network;
@@ -140,7 +141,9 @@ config_parse_bridge_interface(struct uci_section *s)
 static void
 config_parse_interface(struct uci_section *s)
 {
+	struct interface *iface;
 	const char *type;
+
 	DPRINTF("Create interface '%s'\n", s->e.name);
 
 	blob_buf_init(&b, 0);
@@ -151,7 +154,11 @@ config_parse_interface(struct uci_section *s)
 			return;
 
 	uci_to_blob(&b, s, &interface_attr_list);
-	interface_alloc(s->e.name, s, b.head);
+	iface = interface_alloc(s->e.name, b.head);
+	if (!iface)
+		return;
+
+	proto_init_interface(iface, s);
 }
 
 void
diff --git a/interface.c b/interface.c
index 20956be..f08fee0 100644
--- a/interface.c
+++ b/interface.c
@@ -201,12 +201,13 @@ void interface_set_proto_state(struct interface *iface, struct interface_proto_s
 }
 
 struct interface *
-interface_alloc(const char *name, struct uci_section *s, struct blob_attr *attr)
+interface_alloc(const char *name, struct blob_attr *attr)
 {
 	struct interface *iface;
 	struct blob_attr *tb[IFACE_ATTR_MAX];
 	struct blob_attr *cur;
 	struct device *dev;
+	const char *proto_name = NULL;
 
 	iface = interface_get(name);
 	if (iface)
@@ -221,19 +222,22 @@ interface_alloc(const char *name, struct uci_section *s, struct blob_attr *attr)
 	INIT_LIST_HEAD(&iface->address);
 	INIT_LIST_HEAD(&iface->routes);
 
-	proto_attach_interface(iface, s);
-
-	netifd_ubus_add_interface(iface);
-
 	blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 		      blob_data(attr), blob_len(attr));
 
+	if ((cur = tb[IFACE_ATTR_PROTO]))
+		proto_name = blobmsg_data(cur);
+
+	proto_attach_interface(iface, proto_name);
+
 	if ((cur = tb[IFACE_ATTR_IFNAME])) {
 		dev = device_get(blobmsg_data(cur), true);
 		if (dev)
 			device_add_user(&iface->main_dev, dev);
 	}
 
+	netifd_ubus_add_interface(iface);
+
 	return iface;
 }
 
diff --git a/interface.h b/interface.h
index 9090164..f66b5b9 100644
--- a/interface.h
+++ b/interface.h
@@ -47,6 +47,7 @@ struct interface {
 	struct device_user *l3_iface;
 
 	/* primary protocol state */
+	const struct proto_handler *proto_handler;
 	struct interface_proto_state *proto;
 
 	struct list_head address, routes;
@@ -60,7 +61,7 @@ struct interface {
 extern const struct config_param_list interface_attr_list;
 
 struct interface *interface_get(const char *name);
-struct interface *interface_alloc(const char *name, struct uci_section *s, struct blob_attr *attr);
+struct interface *interface_alloc(const char *name, struct blob_attr *attr);
 void interface_free(struct interface *iface);
 
 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state);
diff --git a/proto-static.c b/proto-static.c
index 3c251f4..6b4cc23 100644
--- a/proto-static.c
+++ b/proto-static.c
@@ -215,7 +215,7 @@ static_free(struct interface_proto_state *proto)
 }
 
 struct interface_proto_state *
-static_attach(struct proto_handler *h, struct interface *iface,
+static_attach(const struct proto_handler *h, struct interface *iface,
 	      struct uci_section *s)
 {
 	struct static_proto_state *state;
diff --git a/proto.c b/proto.c
index 5126107..7242e80 100644
--- a/proto.c
+++ b/proto.c
@@ -41,22 +41,33 @@ no_proto_handler(struct interface_proto_state *proto,
 }
 
 static struct interface_proto_state *
-get_default_proto(void)
+default_proto_attach(const struct proto_handler *h,
+		     struct interface *iface,
+		     struct uci_section *s)
 {
 	struct interface_proto_state *proto;
 
 	proto = calloc(1, sizeof(*proto));
 	proto->free = default_proto_free;
 	proto->flags = PROTO_FLAG_IMMEDIATE;
+	proto->handler = no_proto_handler;
 
 	return proto;
 }
 
-struct proto_handler *
+static const struct proto_handler no_proto = {
+	.name = "none",
+	.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;
 
@@ -64,44 +75,38 @@ get_proto_handler(const char *name)
 }
 
 void
-proto_attach_interface(struct interface *iface, struct uci_section *s)
+proto_init_interface(struct interface *iface, struct uci_section *s)
 {
+	const struct proto_handler *proto = iface->proto_handler;
 	struct interface_proto_state *state = NULL;
-	struct proto_handler *proto = NULL;
-	const char *proto_name;
-	const char *error = NULL;
 
-	proto_name = uci_lookup_option_string(uci_ctx, s, "proto");
-	if (!proto_name) {
-		error = "NO_PROTO";
-		goto error;
-	}
+	if (proto)
+		state = proto->attach(proto, iface, s);
 
-	if (!strcmp(proto_name, "none")) {
-		state = get_default_proto();
-		state->handler = no_proto_handler;
-		goto out;
+	if (!state) {
+		state = no_proto.attach(&no_proto, iface, s);
+		state->handler = invalid_proto_handler;
 	}
 
-	proto = get_proto_handler(proto_name);
-	if (!proto) {
-		error = "INVALID_PROTO";
-		goto error;
-	}
+	interface_set_proto_state(iface, state);
+}
 
-	state = proto->attach(proto, iface, s);
+void
+proto_attach_interface(struct interface *iface, const char *proto_name)
+{
+	const struct proto_handler *proto = NULL;
 
-error:
-	if (error) {
-		interface_add_error(iface, "proto", error, NULL, 0);
-		state = get_default_proto();
-		state->handler = invalid_proto_handler;
+	if (!proto_name) {
+		interface_add_error(iface, "proto", "NO_PROTO", NULL, 0);
+		return;
 	}
 
-out:
-	interface_set_proto_state(iface, state);
-}
+	proto = get_proto_handler(proto_name);
+	if (!proto)
+		interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
 
+	iface->proto_handler = proto;
+}
 
 int
 interface_proto_event(struct interface_proto_state *proto,
diff --git a/proto.h b/proto.h
index fd9a0f8..332745c 100644
--- a/proto.h
+++ b/proto.h
@@ -32,7 +32,7 @@ struct interface_proto_state {
 };
 
 typedef struct interface_proto_state *
-	(*proto_attach_cb)(struct proto_handler *h, struct interface *,
+	(*proto_attach_cb)(const struct proto_handler *h, struct interface *,
 			   struct uci_section *s);
 
 struct proto_handler {
@@ -43,8 +43,8 @@ struct proto_handler {
 };
 
 void add_proto_handler(struct proto_handler *p);
-struct proto_handler *get_proto_handler(const char *name);
-void proto_attach_interface(struct interface *iface, struct uci_section *s);
+void proto_init_interface(struct interface *iface, struct uci_section *s);
+void proto_attach_interface(struct interface *iface, const char *proto_name);
 int interface_proto_event(struct interface_proto_state *proto,
 			  enum interface_proto_cmd cmd, bool force);
 
-- 
2.11.0