Testing

Transfer Update Checks

Send- and receive-side release checks are normally cached for 24 hours. Set CROC_DO_CHECK=1 to bypass a fresh cache, wait for a release request before the transfer starts, and report whether a newer release is available:

bash

CROC_DO_CHECK=1 croc send file.txt

The override waits up to two seconds for the request and reports when the current version is already latest or when the check is unavailable. It does not display a notice under --quiet or turn update-check failures into errors.

Local Reconnect Interruptions

Use three terminals to run a local relay, receiver, and sender. From the repository root, build the binary and start a local relay in the first terminal:

bash

go build -o ./bin/croc && ./bin/croc relay --ports 9009,9010

In the second terminal, start the receiver:

bash

rm -rf croc-big.bin && ./bin/croc --debug --yes --overwrite --relay 127.0.0.1:9009 test-reconnect-code

In the third terminal, start the sender:

bash

./bin/croc --relay 127.0.0.1:9009 --throttleUpload 512K --no-compress send --code test-reconnect-code --no-local --no-multi /tmp/croc-big.bin

While the transfer is running, interrupt one active socket.

For a data-channel drop:

bash

sudo ss -K dst 127.0.0.1 dport = :9010

For a control-channel drop:

bash

sudo ss -K dst 127.0.0.1 dport = :9009

If no connection is killed, inspect the active croc sockets and adjust the port:

bash

sudo ss -tnp | grep croc