netifd [1] - system - HelloWorld开发者社区

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)