__vlan_get_protocol

函数名称：vlan_get_protocol - get protocol EtherType.*@skb: skbuff to query*@type: first vlan protocol*@depth: buffer to store length of eth and vlan tags in bytes* Returns the EtherType of the packet, regardless of whether it is

函数原型：static inline __be16 __vlan_get_protocol(struct sk_buff *skb, __be16 type, int *depth)

返回类型：__be16

参数：

类型	参数	名称
struct sk_buff *	skb
__be16	type
int *	depth

583

vlan_depth等于mac_len

589

如果h_type_vlan - check for valid vlan ether type.*@ethertype: ether type to check* Returns true if the ether type is a vlan ether type.则

590

如果vlan_depth则

591

如果WARN_ON(vlan_depth < The additional bytes required by VLAN* (in addition to the Ethernet header))则返回:0

593

vlan_depth减等于The additional bytes required by VLAN* (in addition to the Ethernet header)

594

否则

595

vlan_depth等于Total octets in header.

597

循环

600

如果此条件成立可能性小(为编译器优化)(!pskb_may_pull(skb, vlan_depth + The additional bytes required by VLAN* (in addition to the Ethernet header)))则返回:0

604

vh等于data加vlan_depth

605

type等于h_vlan_encapsulated_proto

606

vlan_depth加等于The additional bytes required by VLAN* (in addition to the Ethernet header)

607

当h_type_vlan - check for valid vlan ether type.*@ethertype: ether type to check* Returns true if the ether type is a vlan ether type.循环

610

如果depth则depth等于vlan_depth

613

返回:type

**调用者**
名称	描述
vlan_get_protocol	得到协议的以太网类型

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告