Block sending of oversize messages #127
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kzys
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Jan 26, 2023
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Regarding RESOURCE_EXHAUSTED, https://github.com/grpc/grpc-go/blob/87eb5b7502493f758e76c4d09430c0049a81a557/codes/codes.go#L92-L98
Seems gRPC is doing the same. |
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Would it replace #119? |
When trying to send a message that is bigger than the max message length the send function will return an GRPC error 8 (RESOURCE_EXHAUSTED). It will also close the connection so that the read function discards the unused message. Signed-off-by: Alessio Cantillo <cantillo.trd@gmail.com>
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dmcgowan
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Feb 29, 2024
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| if status.Code() != codes.ResourceExhausted { | ||
| t.Fatalf("expected grpc status code: %v != %v", status.Code(), codes.ResourceExhausted) | ||
| if err != nil { |
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This test shouldn't branch, if an error is expected this should assert the error is not nil.
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While looking to solve the containerd bug #6248 (containerd/containerd#6248 (comment)) I saw that it was already solved but the message would only be checked for the length after sending. Like @dmcgowan noted the message should not even be sent because it will be discarded anyway. I changed the code so that the send function will check for the size and not send the message in case the length is longer than the max message length. I opted for an GRPC error code 8 (RESOURCE_EXHAUSTED) over error code 3 (INVALID_ARGUMENT) because it describes the error better.
I hope that this is what we were looking for and I'm open to any input.