From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 10 Sep 2011 16:34:43 +0000 (+0200)
Subject: fix invoking shell protocol handler scripts
X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=commitdiff_plain;h=c601d036d6e9efce0c31eecd0fc66a716f41f2a3

fix invoking shell protocol handler scripts
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 43ced00..b264b1e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,4 +21,4 @@ ADD_EXECUTABLE(netifd
 	config.c device.c bridge.c vlan.c ubus.c
 	system-dummy.c)
 
-TARGET_LINK_LIBRARIES(netifd ubox ubus uci json)
+TARGET_LINK_LIBRARIES(netifd ubox ubus uci json blobmsg_json)
diff --git a/config/network b/config/network
index 2b4549d..6e9d7a6 100644
--- a/config/network
+++ b/config/network
@@ -34,3 +34,8 @@ config interface lan2
 	option netmask	255.255.255.0
 	option gateway	192.168.1.2
 
+config interface wan
+	option proto	pppoe
+	option ifname	br-lan2
+	option username	foo
+	option password bar
diff --git a/proto-shell.c b/proto-shell.c
index 351e0bf..84d1c9c 100644
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -13,7 +13,7 @@
 #include "proto.h"
 
 static LIST_HEAD(handlers);
-static int proto_fd, main_fd;
+static int proto_fd;
 
 struct proto_shell_handler {
 	struct list_head list;
@@ -25,21 +25,69 @@ struct proto_shell_handler {
 
 struct proto_shell_state {
 	struct interface_proto_state proto;
+	struct proto_shell_handler *handler;
 	struct blob_attr *config;
 };
 
-#define DUMP_SUFFIX	" dump"
+#define DUMP_SUFFIX	" '' dump"
+
+static int run_script(const char **argv)
+{
+	int pid, ret;
+
+	if ((pid = fork()) < 0)
+		return -1;
+
+	if (!pid) {
+		fchdir(proto_fd);
+		execvp(argv[0], (char **) argv);
+		exit(127);
+	}
+
+	if (waitpid(pid, &ret, 0) == -1)
+		ret = -1;
+
+	if (ret > 0)
+		return -ret;
+
+	return 0;
+}
 
 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;
+	const char *argv[5];
+	char *config;
+	int ret;
+
+	state = container_of(proto, struct proto_shell_state, proto);
+	handler = state->handler;
+
+	config = blobmsg_format_json(state->config, true);
+	if (!config)
+		return -1;
+
+	argv[0] = handler->script_name;
+	argv[1] = handler->proto.name;
+	argv[2] = "teardown";
+	argv[3] = config;
+	argv[4] = NULL;
+
 	switch(cmd) {
 	case PROTO_CMD_SETUP:
+		argv[2] = "setup";
+		/* fall through */
 	case PROTO_CMD_TEARDOWN:
+		ret = run_script(argv);
 		break;
 	}
-	return 0;
+
+	free(config);
+
+	return ret;
 }
 
 static void
@@ -66,6 +114,7 @@ proto_shell_attach(const struct proto_handler *h, struct interface *iface,
 	memcpy(state->config, attr, blob_pad_len(attr));
 	state->proto.free = proto_shell_free;
 	state->proto.handler = proto_shell_handler;
+	state->handler = container_of(h, struct proto_shell_handler, proto);
 
 	return &state->proto;
 
@@ -228,6 +277,7 @@ static void proto_shell_add_script(const char *name)
 void __init proto_shell_init(void)
 {
 	glob_t g;
+	int main_fd;
 	int i;
 
 	main_fd = open(".", O_RDONLY | O_DIRECTORY);
@@ -250,11 +300,7 @@ void __init proto_shell_init(void)
 	for (i = 0; i < g.gl_pathc; i++)
 		proto_shell_add_script(g.gl_pathv[i]);
 
-	if (list_empty(&handlers))
-		close(proto_fd);
-
 close_cur:
 	fchdir(main_fd);
-	if (list_empty(&handlers))
-		close(main_fd);
+	close(main_fd);
 }
diff --git a/proto/netifd-proto.sh b/proto/netifd-proto.sh
index 3764281..b91863f 100755
--- a/proto/netifd-proto.sh
+++ b/proto/netifd-proto.sh
@@ -26,7 +26,11 @@ add_default_handler() {
 	esac
 }
 
-case "$1" in
+proto="$1"
+cmd="$2"
+data="$3"
+
+case "$cmd" in
 	dump)
 		add_protocol() {
 			immediate=0
@@ -45,7 +49,13 @@ case "$1" in
 	;;
 	*)
 		add_protocol() {
-			return;
+			[[ "$proto" == "$1" ]] || return 0
+
+			case "$cmd" in
+				setup) eval "$1_setup \"\$data\"" ;;
+				teardown) eval "$1_teardown \"\$data\"" ;;
+				*) return 1 ;;
+			esac
 		}
 	;;
 esac
diff --git a/proto/ppp.sh b/proto/ppp.sh
index 8dd97c0..9a5816b 100755
--- a/proto/ppp.sh
+++ b/proto/ppp.sh
@@ -9,7 +9,7 @@ ppp_init_config() {
 }
 
 ppp_setup() {
-	return
+	echo "ppp_setup: $1"
 }
 
 ppp_teardown() {
@@ -30,4 +30,12 @@ pppoe_init() {
 	return
 }
 
+pppoe_setup() {
+	echo "pppoe_setup: $1"
+}
+
+pppoe_teardown() {
+	return
+}
+
 add_protocol pppoe