root
26 lines
720 B
Go
26 lines
720 B
Go
// Package comms validates the data that crosses the wormhole link. The
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// content of uplinks and downlinks is opaque bytes defined by the player's
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// ship program; only sizes are enforced.
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package comms
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import "fmt"
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func CheckUplink(data []byte, limit int) error {
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if len(data) > limit {
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return fmt.Errorf("uplink is %d bytes, limit is %d", len(data), limit)
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}
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return nil
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}
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func CheckProgram(prog []byte, limit int) error {
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switch {
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case len(prog) == 0:
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return fmt.Errorf("program is empty")
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case len(prog)%4 != 0:
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return fmt.Errorf("program length %d is not a multiple of 4", len(prog))
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case len(prog) > limit:
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return fmt.Errorf("program is %d bytes, limit is %d", len(prog), limit)
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}
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return nil
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}
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