diff options
Diffstat (limited to 'pkg/tcpip/transport/tcp/testing')
| -rw-r--r-- | pkg/tcpip/transport/tcp/testing/context/context.go | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/pkg/tcpip/transport/tcp/testing/context/context.go b/pkg/tcpip/transport/tcp/testing/context/context.go index 4854e719d..0a733fa94 100644 --- a/pkg/tcpip/transport/tcp/testing/context/context.go +++ b/pkg/tcpip/transport/tcp/testing/context/context.go @@ -309,6 +309,12 @@ func (c *Context) SendICMPPacket(typ header.ICMPv4Type, code uint8, p1, p2 []byt // BuildSegment builds a TCP segment based on the given Headers and payload. func (c *Context) BuildSegment(payload []byte, h *Headers) buffer.VectorisedView { + return c.BuildSegmentWithAddrs(payload, h, TestAddr, StackAddr) +} + +// BuildSegmentWithAddrs builds a TCP segment based on the given Headers, +// payload and source and destination IPv4 addresses. +func (c *Context) BuildSegmentWithAddrs(payload []byte, h *Headers, src, dst tcpip.Address) buffer.VectorisedView { // Allocate a buffer for data and headers. buf := buffer.NewView(header.TCPMinimumSize + header.IPv4MinimumSize + len(h.TCPOpts) + len(payload)) copy(buf[len(buf)-len(payload):], payload) @@ -321,8 +327,8 @@ func (c *Context) BuildSegment(payload []byte, h *Headers) buffer.VectorisedView TotalLength: uint16(len(buf)), TTL: 65, Protocol: uint8(tcp.ProtocolNumber), - SrcAddr: TestAddr, - DstAddr: StackAddr, + SrcAddr: src, + DstAddr: dst, }) ip.SetChecksum(^ip.CalculateChecksum()) @@ -339,7 +345,7 @@ func (c *Context) BuildSegment(payload []byte, h *Headers) buffer.VectorisedView }) // Calculate the TCP pseudo-header checksum. - xsum := header.PseudoHeaderChecksum(tcp.ProtocolNumber, TestAddr, StackAddr, uint16(len(t))) + xsum := header.PseudoHeaderChecksum(tcp.ProtocolNumber, src, dst, uint16(len(t))) // Calculate the TCP checksum and set it. xsum = header.Checksum(payload, xsum) @@ -365,6 +371,15 @@ func (c *Context) SendPacket(payload []byte, h *Headers) { }) } +// SendPacketWithAddrs builds and sends a TCP segment(with the provided payload +// & TCPheaders) in an IPv4 packet via the link layer endpoint using the +// provided source and destination IPv4 addresses. +func (c *Context) SendPacketWithAddrs(payload []byte, h *Headers, src, dst tcpip.Address) { + c.linkEP.InjectInbound(ipv4.ProtocolNumber, tcpip.PacketBuffer{ + Data: c.BuildSegmentWithAddrs(payload, h, src, dst), + }) +} + // SendAck sends an ACK packet. func (c *Context) SendAck(seq seqnum.Value, bytesReceived int) { c.SendAckWithSACK(seq, bytesReceived, nil) @@ -490,6 +505,13 @@ func (c *Context) GetV6Packet() []byte { // SendV6Packet builds and sends an IPv6 Packet via the link layer endpoint of // the context. func (c *Context) SendV6Packet(payload []byte, h *Headers) { + c.SendV6PacketWithAddrs(payload, h, TestV6Addr, StackV6Addr) +} + +// SendV6PacketWithAddrs builds and sends an IPv6 Packet via the link layer +// endpoint of the context using the provided source and destination IPv6 +// addresses. +func (c *Context) SendV6PacketWithAddrs(payload []byte, h *Headers, src, dst tcpip.Address) { // Allocate a buffer for data and headers. buf := buffer.NewView(header.TCPMinimumSize + header.IPv6MinimumSize + len(payload)) copy(buf[len(buf)-len(payload):], payload) @@ -500,8 +522,8 @@ func (c *Context) SendV6Packet(payload []byte, h *Headers) { PayloadLength: uint16(header.TCPMinimumSize + len(payload)), NextHeader: uint8(tcp.ProtocolNumber), HopLimit: 65, - SrcAddr: TestV6Addr, - DstAddr: StackV6Addr, + SrcAddr: src, + DstAddr: dst, }) // Initialize the TCP header. @@ -517,7 +539,7 @@ func (c *Context) SendV6Packet(payload []byte, h *Headers) { }) // Calculate the TCP pseudo-header checksum. - xsum := header.PseudoHeaderChecksum(tcp.ProtocolNumber, TestV6Addr, StackV6Addr, uint16(len(t))) + xsum := header.PseudoHeaderChecksum(tcp.ProtocolNumber, src, dst, uint16(len(t))) // Calculate the TCP checksum and set it. xsum = header.Checksum(payload, xsum) |