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封装对udp链接的读操作 将其对外暴露为一个阻塞操作

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impact-eintr
2022-12-02 12:35:52 +08:00
parent be40f904fc
commit 98bccec410
6 changed files with 128 additions and 86 deletions
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11
tcpip/link/fdbased/endpoint.go
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@@ -202,7 +202,16 @@ func (e *endpoint) dispatch() (bool, *tcpip.Error) {
vv := buffer.NewVectorisedView(n, e.views[:used]) // 用这些有效的内容构建vv
vv.TrimFront(e.hdrSize) // 将数据内容删除以太网头部信息 将网络层作为数据头
e.dispatcher.DeliverNetworkPacket(e, remoteLinkAddr, localLinkAddr, p, vv)
switch p {
case header.ARPProtocolNumber, header.IPv4ProtocolNumber:
log.Println("链路层收到报文")
e.dispatcher.DeliverNetworkPacket(e, remoteLinkAddr, localLinkAddr, p, vv)
case header.IPv6ProtocolNumber:
// TODO ipv6暂时不感兴趣
e.dispatcher.DeliverNetworkPacket(e, remoteLinkAddr, localLinkAddr, p, vv)
default:
log.Println("未知类型的非法报文")
}
// 将分发后的数据无效化(设置nil可以让gc回收这些内存)
for i := 0; i < used; i++ {