add copyright headers

[project/netifd.git] / proto-shell.c

diff --git a/proto-shell.c b/proto-shell.c
index 4cff091..6312d9e 100644 (file)
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -1,3 +1,16 @@
+/*
+ * 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>
@@ -261,6 +274,7 @@ enum {
        NOTIFY_ROUTES6,
        NOTIFY_TUNNEL,
        NOTIFY_DATA,
+       NOTIFY_KEEP,
        __NOTIFY_LAST
 };
 
@@ -278,6 +292,7 @@ static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
        [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 },
 };
 
 static int
@@ -289,6 +304,7 @@ proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data,
        const char *devname;
        int dev_create = 1;
        bool addr_ext = false;
+       bool keep = false;
        bool up;
 
        if (!tb[NOTIFY_LINK_UP])
@@ -300,6 +316,9 @@ proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data,
                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)
@@ -309,7 +328,8 @@ proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data,
        if (!tb[NOTIFY_IFNAME]) {
                if (!iface->main_dev.dev)
                        return UBUS_STATUS_INVALID_ARGUMENT;
-       } else {
+       } 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,
@@ -326,7 +346,9 @@ proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data,
                device_claim(&iface->l3_dev);
        }
 
-       interface_update_start(iface);
+       if (!keep)
+               interface_update_start(iface);
+
        proto_apply_ip_settings(iface, data, addr_ext);
 
        if ((cur = tb[NOTIFY_ROUTES]) != NULL)
@@ -337,7 +359,8 @@ proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data,
 
        interface_update_complete(state->proto.iface);
 
-       state->proto.proto_event(&state->proto, IFPEV_UP);
+       if (!keep)
+               state->proto.proto_event(&state->proto, IFPEV_UP);
        state->sm = S_IDLE;
 
        if ((cur = tb[NOTIFY_DATA]))