mirror of
https://github.com/netbirdio/netbird.git
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78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
//go:build linux && !android && privileged
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package rawsocket
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import (
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"net"
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"syscall"
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"testing"
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"golang.org/x/sys/unix"
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nbnet "github.com/netbirdio/netbird/client/net"
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)
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// The sender sockets must stay unmarked: a NAT rule matching on fwmark that
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// rewrites the source of an injected packet makes WireGuard adopt the rewritten
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// address as the peer endpoint.
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func TestSenderRawSocketsCarryNoFwmark(t *testing.T) {
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// the mark is only ever applied when advanced routing is available, so
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// without it the assertion below would hold for the wrong reason
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nbnet.Init()
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if !nbnet.AdvancedRouting() {
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t.Skip("advanced routing unsupported, the sockets carry no mark either way")
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}
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tests := []struct {
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name string
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prepare func() (net.PacketConn, error)
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// the proxy treats the IPv6 socket as optional, so a host without IPv6
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// is a reason to skip rather than to fail
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optional bool
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}{
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{name: "IPv4", prepare: PrepareSenderRawSocketIPv4},
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{name: "IPv6", prepare: PrepareSenderRawSocketIPv6, optional: true},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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conn, err := tc.prepare()
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if err != nil {
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if tc.optional {
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t.Skipf("prepare raw socket: %v", err)
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}
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t.Fatalf("prepare raw socket: %v", err)
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}
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defer func() {
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if err := conn.Close(); err != nil {
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t.Logf("close raw socket: %v", err)
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}
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}()
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syscallConn, ok := conn.(syscall.Conn)
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if !ok {
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t.Fatalf("raw socket %T does not expose a syscall conn", conn)
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}
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raw, err := syscallConn.SyscallConn()
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if err != nil {
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t.Fatalf("syscall conn: %v", err)
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}
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var mark int
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var markErr error
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if err := raw.Control(func(fd uintptr) {
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mark, markErr = unix.GetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_MARK)
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}); err != nil {
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t.Fatalf("control: %v", err)
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}
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if markErr != nil {
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t.Fatalf("get SO_MARK: %v", markErr)
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}
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if mark != 0 {
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t.Errorf("SO_MARK = %#x, want 0", mark)
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}
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})
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}
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}
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