device: ignore MTU values below minimum

[project/netifd.git] / device.c

diff --git a/device.c b/device.c
index fa3d00f..82596e4 100644 (file)
--- a/device.c
+++ b/device.c
@@ -24,10 +24,13 @@
 #include <netinet/ether.h>
 #endif
 
+#include <libubox/list.h>
+
 #include "netifd.h"
 #include "system.h"
 #include "config.h"
 
+static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
 static struct avl_tree devices;
 static bool default_ps = true;
 
@@ -51,6 +54,7 @@ static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
        [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
        [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
+       [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
@@ -63,6 +67,36 @@ const struct uci_blob_param_list device_attr_list = {
 
 static int __devlock = 0;
 
+int device_type_add(struct device_type *devtype)
+{
+       if (device_type_get(devtype->name)) {
+               netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
+                                  devtype->name);
+               return 1;
+       }
+
+       netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
+               devtype->name);
+
+       list_add(&devtype->list, &devtypes);
+       return 0;
+}
+
+/* Retrieve the device type for the given name. If 'bridge' is true, the type
+ * must have bridge capabilities
+ */
+struct device_type *
+device_type_get(const char *tname)
+{
+       struct device_type *cur;
+
+       list_for_each_entry(cur, &devtypes, list)
+               if (!strcmp(cur->name, tname))
+                       return cur;
+
+       return NULL;
+}
+
 void device_lock(void)
 {
        __devlock++;
@@ -118,11 +152,15 @@ simple_device_set_state(struct device *dev, bool state)
 }
 
 static struct device *
-simple_device_create(const char *name, struct blob_attr *attr)
+simple_device_create(const char *name, struct device_type *devtype,
+                    struct blob_attr *attr)
 {
        struct blob_attr *tb[__DEV_ATTR_MAX];
        struct device *dev = NULL;
 
+       /* device type is unused for simple devices */
+       devtype = NULL;
+
        blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
        dev = device_get(name, true);
        if (!dev)
@@ -141,7 +179,7 @@ static void simple_device_free(struct device *dev)
        free(dev);
 }
 
-const struct device_type simple_device_type = {
+struct device_type simple_device_type = {
        .name = "Network device",
        .config_params = &device_attr_list,
 
@@ -184,6 +222,7 @@ device_merge_settings(struct device *dev, struct device_settings *n)
                s->multicast : os->multicast;
        n->multicast_to_unicast = s->multicast_to_unicast;
        n->multicast_router = s->multicast_router;
+       n->multicast_fast_leave = s->multicast_fast_leave;
        n->learning = s->learning;
        n->unicast_flood = s->unicast_flood;
        n->flags = s->flags | os->flags | os->valid_flags;
@@ -201,12 +240,12 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
        if ((cur = tb[DEV_ATTR_ENABLED]))
                disabled = !blobmsg_get_bool(cur);
 
-       if ((cur = tb[DEV_ATTR_MTU])) {
+       if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
                s->mtu = blobmsg_get_u32(cur);
                s->flags |= DEV_OPT_MTU;
        }
 
-       if ((cur = tb[DEV_ATTR_MTU6])) {
+       if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
                s->mtu6 = blobmsg_get_u32(cur);
                s->flags |= DEV_OPT_MTU6;
        }
@@ -304,6 +343,11 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
                        DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
        }
 
+       if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
+               s->multicast_fast_leave = blobmsg_get_bool(cur);
+               s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
+       }
+
        if ((cur = tb[DEV_ATTR_MULTICAST])) {
                s->multicast = blobmsg_get_bool(cur);
                s->flags |= DEV_OPT_MULTICAST;
@@ -406,6 +450,10 @@ void device_release(struct device_user *dep)
        device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
        if (!dev->external)
                dev->set_state(dev, false);
+
+       if (dev->active)
+               return;
+
        device_broadcast_event(dev, DEV_EVENT_DOWN);
 }
 
@@ -417,7 +465,7 @@ int device_check_state(struct device *dev)
        return dev->type->check_state(dev);
 }
 
-void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
+void device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 {
        assert(dev);
        assert(type);
@@ -434,7 +482,7 @@ void device_init_virtual(struct device *dev, const struct device_type *type, con
                dev->set_state = set_device_state;
 }
 
-int device_init(struct device *dev, const struct device_type *type, const char *ifname)
+int device_init(struct device *dev, struct device_type *type, const char *ifname)
 {
        int ret;
 
@@ -729,7 +777,7 @@ device_init_pending(void)
 }
 
 static enum dev_change_type
-device_set_config(struct device *dev, const struct device_type *type,
+device_set_config(struct device *dev, struct device_type *type,
                  struct blob_attr *attr)
 {
        struct blob_attr *tb[__DEV_ATTR_MAX];
@@ -758,7 +806,7 @@ device_set_config(struct device *dev, const struct device_type *type,
 }
 
 enum dev_change_type
-device_apply_config(struct device *dev, const struct device_type *type,
+device_apply_config(struct device *dev, struct device_type *type,
                    struct blob_attr *config)
 {
        enum dev_change_type change;
@@ -883,7 +931,7 @@ device_set_default_ps(bool state)
 }
 
 struct device *
-device_create(const char *name, const struct device_type *type,
+device_create(const char *name, struct device_type *type,
              struct blob_attr *config)
 {
        struct device *odev = NULL, *dev;
@@ -908,7 +956,7 @@ device_create(const char *name, const struct device_type *type,
        if (!config)
                return NULL;
 
-       dev = type->create(name, config);
+       dev = type->create(name, type, config);
        if (!dev)
                return NULL;
 
@@ -994,6 +1042,8 @@ device_dump_status(struct blob_buf *b, struct device *dev)
                        blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
                if (st.flags & DEV_OPT_MULTICAST_ROUTER)
                        blobmsg_add_u32(b, "multicast_router", st.multicast_router);
+               if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
+                       blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
                if (st.flags & DEV_OPT_MULTICAST)
                        blobmsg_add_u8(b, "multicast", st.multicast);
                if (st.flags & DEV_OPT_LEARNING)
@@ -1009,3 +1059,8 @@ device_dump_status(struct blob_buf *b, struct device *dev)
                system_if_dump_stats(dev, b);
        blobmsg_close_table(b, s);
 }
+
+static void __init simple_device_type_init(void)
+{
+       device_type_add(&simple_device_type);
+}