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udp基本写完了 关于socket的不少细节还没看 另外在网络栈静置一段时间后再次发起连接将无法找到路由

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impact-eintr
2022-12-02 21:11:41 +08:00
parent ab3705960a
commit 050d5fec97
13 changed files with 655 additions and 74 deletions
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5
tcpip/network/ipv4/ipv4.go
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@@ -108,7 +108,7 @@ func (e *endpoint) WritePacket(r *stack.Route, hdr buffer.Prependable, payload b
// 写入网卡接口
if protocol == header.ICMPv4ProtocolNumber {
log.Printf("IP 写回ICMP报文 长度: %d\n", hdr.UsedLength()+payload.Size())
log.Println("IP 写回ICMP报文", header.IPv4(append(ip, payload.ToView()...)))
} else {
//log.Printf("send ipv4 packet %d bytes, proto: 0x%x", hdr.UsedLength()+payload.Size(), protocol)
log.Println(header.IPv4(append(ip, payload.ToView()...)))
@@ -132,7 +132,6 @@ func (e *endpoint) HandlePacket(r *stack.Route, vv buffer.VectorisedView) {
tlen := int(h.TotalLength())
vv.TrimFront(hlen)
vv.CapLength(tlen - hlen)
log.Println(hlen, tlen)
// 报文重组
more := (h.Flags() & header.IPv4FlagMoreFragments) != 0
@@ -157,7 +156,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, vv buffer.VectorisedView) {
}
r.Stats().IP.PacketsDelivered.Increment()
// 根据协议分发到不同处理函数，比如协议时TCP，会进入tcp.HandlePacket
log.Printf("recv ipv4 packet %d bytes, proto: 0x%x", tlen, p)
log.Printf("准备前往 UDP/TCP recv ipv4 packet %d bytes, proto: 0x%x", tlen, p)
e.dispatcher.DeliverTransportPacket(r, p, vv)
}