* fix: handle Unix socket RemoteAddr in IP resolution
When oauth2-proxy listens on a Unix socket, Go sets RemoteAddr to "@"
instead of the usual "host:port" format. This caused net.SplitHostPort
to fail on every request, flooding logs with errors:
Error obtaining real IP for trusted IP list: unable to get ip and
port from http.RemoteAddr (@)
Fix by handling the "@" RemoteAddr at the source in getRemoteIP,
returning nil without error since Unix sockets have no meaningful
client IP. Also simplify the isTrustedIP guard and add a nil check
in GetClientString to prevent calling String() on nil net.IP.
Fixes#3373
Signed-off-by: h1net <ben@freshdevs.com>
* docs: add changelog entry and Unix socket trusted IPs documentation
Add changelog entry for #3374. Document that trusted IPs cannot match
against RemoteAddr for Unix socket listeners since Go sets it to "@",
and that IP-based trust still works via X-Forwarded-For with reverse-proxy.
Signed-off-by: Ben Newbery <ben.newbery@gmail.com>
Signed-off-by: h1net <ben@freshdevs.com>
* doc: fix changelog entry for #3374
Signed-off-by: Jan Larwig <jan@larwig.com>
* doc: add trusted ip a section to versioned docs as well
Signed-off-by: Jan Larwig <jan@larwig.com>
---------
Signed-off-by: h1net <ben@freshdevs.com>
Signed-off-by: Ben Newbery <ben.newbery@gmail.com>
Signed-off-by: Jan Larwig <jan@larwig.com>
Co-authored-by: Jan Larwig <jan@larwig.com>
a4d89036ec