redsocks with http-connect does not seem to work on resinOS 2.10.0+

[imrehg]

Looks like resinOS proxying had a regression, where http-connect of the redsocks.conf works for <=resinOS 2.9.7, but does not work for >=2.10.0 (including the latest 2.12.5). socks5 works for all versions.

On the failing system I see errors like:

Apr 02 09:43:17 e117fb6 redsocks[1212]: 1522662197.346781 info redsocks.c:1243 redsocks_accept_client(...) [192.168.0.72:41046->54.164.253.112:443]: accepted
Apr 02 09:43:17 e117fb6 redsocks[1212]: 1522662197.348122 debug redsocks.c:782 redsocks_shutdown(...) [192.168.0.72:41046->54.164.253.112:443]: shutdown: bufferevent_disable(client, EV_READ)
Apr 02 09:43:18 e117fb6 redsocks[1212]: 1522662198.003146 debug redsocks.c:782 redsocks_shutdown(...) [192.168.0.72:41002->54.164.253.112:443]: shutdown: bufferevent_disable(relay, EV_READ)
...

while on the working system it is something like:

Apr 02 09:43:01 cddc975 redsocks[1003]: 1522662181.875144 info redsocks.c:1243 redsocks_accept_client(...) [192.168.0.35:51336->54.164.253.112:443]: accepted
Apr 02 09:43:01 cddc975 redsocks[1003]: 1522662181.999162 debug redsocks.c:341 redsocks_start_relay(...) [192.168.0.35:51336->54.164.253.112:443]: data relaying started
Apr 02 09:43:02 cddc975 redsocks[1003]: 1522662182.656435 info redsocks.c:671 redsocks_drop_client(...) [192.168.0.35:51336->54.164.253.112:443]: connection closed

The proxy issue blocks the resin-vpn connection, API requests, etc, so the device is not usable with http-connect...

Tested with glider as glider -listen :8080 -verbose, which runs a mixed socks5/http proxy on port 8080, and with redsocks.conf as

base {
log_debug = on;
log_info = on;
log = stderr;
daemon = off;
redirector = iptables;
}

redsocks {
type = http-connect;
ip = hydra.local;
port = 8080;
local_ip = 127.0.0.1;
local_port = 12345;
}

(tested with RPi3 and Qemu images, FYI in Qemu had to use actual IP in the config, as the device see the host by .local address, as it is normal for Qemu)

On both resinOS versions, direct query through the proxy works, e.g. in the host OS: curl -v -x http://hydra.local:8080 https://api.resin.io/ping

On the new system there's this version info.

redsocks.git/release-0.5
Built with libevent-2.1.8-stable
Runs  with libevent-2.1.8-stable

On the older working one:

redsocks.git/release-0.5
Built with libevent-2.0.22-stable
Runs  with libevent-2.0.22-stable

Anything that can be tested for troubleshooting?

Front conversations

[imrehg]

Might it be this? darkk/redsocks#107