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端口编码、测试结束

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网络协议号:传输层协议号:端口 这就是一个端口 一个端口可以绑定多个网络层地址 ipv4-tcp-9999:{192.168.1.1, 172.176.10.1}
也可以绑定空值 表示 0.0.0.0:9999 本机的所有网卡的所有ip的9999端口都为 tcp/udp 所占用
所有目标端口是9999的数据都会流向这个绑定了9999端口的传输层实现
This commit is contained in:
impact-eintr
2022-11-29 20:05:29 +08:00
parent 8a047726ca
commit 365aebc353
7 changed files with 305 additions and 16 deletions
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41
tcpip/stack/stack.go
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@@ -162,7 +162,7 @@ func (s *Stack) NewEndpoint(transport tcpip.TransportProtocolNumber,
if !ok {
return nil, tcpip.ErrUnknownProtocol
}
return t.proto.NewEndpoint(s, network, waiterQueue)
return t.proto.NewEndpoint(s, network, waiterQueue) // 新建一个传输层实现
}
// CreateNIC 根据给定的网卡号 和 链路层设备号 创建一个网卡对象
@@ -300,7 +300,8 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address,
}
// ===============本机链路层缓存实现==================
// 检查本地是否绑定过该网络层地址
// CheckLocalAddress 检查本地是否绑定过该网络层地址 注意 NICID 为0表示寻找本机所有网卡
func (s *Stack) CheckLocalAddress(nicid tcpip.NICID, protocol tcpip.NetworkProtocolNumber, addr tcpip.Address) tcpip.NICID {
s.mu.RLock()
defer s.mu.RUnlock()
@@ -362,3 +363,39 @@ func (s *Stack) RemoveWaker(nicid tcpip.NICID, addr tcpip.Address, waker *sleep.
s.linkAddrCache.removeWaker(fullAddr, waker)
}
}
// RegisterTransportEndpoint 协议栈或者NIC的分流器注册给定传输层端点。
// 收到的与提供的id匹配的数据包将被传送到给定的端点;指定nic是可选的，但特定于nic的ID优先于全局ID。
// 最终调用 demuxer.registerEndpoint 函数来实现注册。
func (s *Stack) RegisterTransportEndpoint(nicID tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber,
protocol tcpip.TransportProtocolNumber, id TransportEndpointID, ep TransportEndpoint) *tcpip.Error {
// TODO 需要实现
return nil
}
// UnregisterTransportEndpoint removes the endpoint with the given id from the
// stack transport dispatcher.
func (s *Stack) UnregisterTransportEndpoint(nicID tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber,
protocol tcpip.TransportProtocolNumber, id TransportEndpointID) {
}
// NetworkProtocolInstance returns the protocol instance in the stack for the
// specified network protocol. This method is public for protocol implementers
// and tests to use.
func (s *Stack) NetworkProtocolInstance(num tcpip.NetworkProtocolNumber) NetworkProtocol {
if p, ok := s.networkProtocols[num]; ok {
return p
}
return nil
}
// TransportProtocolInstance returns the protocol instance in the stack for the
// specified transport protocol. This method is public for protocol implementers
// and tests to use.
func (s *Stack) TransportProtocolInstance(num tcpip.TransportProtocolNumber) TransportProtocol {
if pState, ok := s.transportProtocols[num]; ok {
return pState.proto
}
return nil
}