system
提供底层操作网络设备API，通过ioctl、rtnl与内核通信，依懒libnl库
init
int system_init(void)
- 创建ioctl socket
sock_ioctl - 创建rtnl socket
sock_rtnl - 创建
NETLINK_ROUTE协议类型rtnl socket，回调函数cb_rtnl_event - 创建
NETLINK_KOBJECT_UEVENT协议类型rtnl socket，回调函数handle_hotplug_event
bridge
addbr
/**
* 创建bridge接口
*/
int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
- 根据输入参数cfg->stp设置bridge的STP开关
- 根据输入参数cfg->forward_delay设置bridge的forward_delay
- 根据输入参数cfg->igmp_snoop设置bridge的igmp snoop功能
- 根据输入参数cfg->priority设置bridge的优先级
- 根据输入参数cfg->flags设置bridge标志
BRCTL_SET_AGEING_TIME、BRIDGE_SET_HELLO_TIME、BRCTL_SET_BRIDGE_MAX_AGE
delbr
/**
* 删除bridge接口
*/
int system_bridge_delbr(struct device *bridge)
addif
/**
* 把接口dev绑到bridge接口上
*/
int system_bridge_addif(struct device *bridge, struct device *dev)
- 判断接口已绑到bridge，如果已绑则退出
- 上述判断是通过
/sys/devices/virtual/net/*/brif/%s/bridge中的内容判断，此目录可能不存在，请注意
delif
/**
* 把接口dev从bridge接口上解绑
*/
int system_bridge_delif(struct device *bridge, struct device *dev)
macvlan
/**
* 创建macvlan接口
*/
int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
```c
/**
* 删除macvlan接口
*/
int system_macvlan_del(struct device *macvlan)
### vlan
```c
/**
* 创建vlan接口
*/
int system_vlan_add(struct device *dev, int id)
```c
/**
* 删除vlan接口
*/
int system_vlan_del(struct device *dev)
### vlandev
```c
/**
* 创建vlan接口，可支持802.1ad
*/
int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
```c
/**
* 删除vlan接口
*/
int system_vlandev_del(struct device *vlandev)
### if
```c
/**
* 清除dev接口状态，与dev相关的route/rule/address
*/
void system_if_clear_state(struct device *dev)
/**
* 保存老配置，设置接口MTU/TXQUEUELEN/MAC/IPv6开关，up接口
*/
int system_if_up(struct device *dev)
/**
* down接口，还原旧配置
*/
int system_if_down(struct device *dev)
/**
* 检查dev状态
*/
int system_if_check(struct device *dev)
/**
* 返回dev信息link-advertising/link-supported/speed
*/
int system_if_dump_info(struct device *dev, struct blob_buf *b)
/**
* 返回dev状态，读取`/sys/class/net/%s/statistics`目录
*/
int system_if_dump_stats(struct device *dev, struct blob_buf *b)
/**
* 返回dev的父dev
*/
struct device *system_if_get_parent(struct device *dev)
/**
* 根据参数设置接口MTU/TXQUEUELEN/MAC/IPv6开关
*/
void system_if_apply_settings(struct device *dev, struct device_settings *s,
unsigned int apply_mask)
/**
* 设置dev ipv4或ipv6地址
*/
int system_add_address(struct device *dev, struct device_addr *addr)
/**
* 删除dev ipv4或ipv6地址
*/
int system_del_address(struct device *dev, struct device_addr *addr)
/**
* 更新接口ipv6的MTU
*/
int system_update_ipv6_mtu(struct device *dev, int mtu)
route
/**
* 添加路由
*/
int system_add_route(struct device *dev, struct device_route *route)
/**
* 删除路由
*/
int system_del_route(struct device *dev, struct device_route *route)
/**
* 刷新路由表
*/
int system_flush_routes(void)
/**
* 由路由表名解析路由表ID
*/
bool system_resolve_rt_table(const char *name, unsigned int *id)
iprule
/**
* 添加策略路由表
*/
int system_add_iprule(struct iprule *rule)
/**
* 删除策略路由表
*/
int system_del_iprule(struct iprule *rule)
/**
* 刷新策略路由表
*/
int system_flush_iprules(void)
/**
* 根据action名称解析对应ID
*/
bool system_resolve_iprule_action(const char *action, unsigned int *id)
tunnel
/**
* 添加ip tunnel
*/
int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
/**
* 删除ip tunnel
*/
int system_del_ip_tunnel(const char *name)