Set TCP_KEEPIDLE=60 if possible #214
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Cap'n Proto connections tend to be long lived and we therefore turn on the `SO_KEEPALIVE` option. However, the default keepalive timeout of 2 hours is much too long for some networks. In particular, Docker's libnetwork silently drops idle connections after about 10 minutes. The OCaml standard library doesn't provide a way to control the timeout, but extunix does.
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…pc and capnp-rpc-unix (0.9.0) CHANGES: - Add connection progress indicator (@talex5 mirage/capnp-rpc#220). Clients can now use `Capnp_rpc_unix.with_cap_exn` to show a progress indicator while waiting to connect. It will use the log if enabled. If not, but stderr is a tty, it shows a message while connecting and then erases it (if connecting takes longer than 0.5s). If stderr is not a tty, it just prints a message there. - Use `Mirage_crypto_rng_lwt.initialize` instead of `Mirage_crypto_rng_unix.initialize` (@hannesm mirage/capnp-rpc#217). The former periodically feeds entropy to the RNG, while the latter seeds the RNG only once. - Set TCP_KEEPIDLE=60 if possible (@talex5 mirage/capnp-rpc#214). Cap'n Proto connections tend to be long lived and we therefore turn on the `SO_KEEPALIVE` option. However, the default keepalive timeout of 2 hours is much too long for some networks. In particular, Docker's libnetwork silently drops idle connections after about 10 minutes. Windows support: - Prevent crash if ExtUnix wasn't built with sockopt (@MisterDA mirage/capnp-rpc#218). If ExtUnix isn't built with sockopt then the symbol `have_sockopt_int` isn't available and an exception is raised. This may be the case on some environments (e.g., ExtUnix built with mingw-w64). It is a workaround until support for `TCP_KEEPIDLE` is added for these environments (e.g., using Winsock instead). - There is no SIGPIPE on Windows (@dra27 mirage/capnp-rpc#212). - Switch from "capnpc" to "capnp compile" (@talex5 mirage/capnp-rpc#213). `capnpc` seems to be the old name, and isn't present on Windows. Build changes: - Remove Travis and Dockerfile (@talex5 mirage/capnp-rpc#220). Travis is very slow and error-prone now, and ocaml-ci generates a working Dockerfile automatically for people who want it. - Include transitive dependencies in opam files (@talex5 mirage/capnp-rpc#219). Patch generated by https://github.com/ocurrent/opam-dune-lint/ - Require `tcpip.unix` specifically to get the checksum stubs linked (@hannesm mirage/capnp-rpc#216).
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Cap'n Proto connections tend to be long lived and we therefore turn on the
SO_KEEPALIVEoption. However, the default keepalive timeout of 2 hours is much too long for some networks. In particular, Docker's libnetwork silently drops idle connections after about 10 minutes.The OCaml standard library doesn't provide a way to control the timeout, but extunix does.