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Posted to bugs@httpd.apache.org by bu...@apache.org on 2014/07/01 11:38:01 UTC
[Bug 56687] New: ProxySourceAddress failed to bind socket to local
address
https://issues.apache.org/bugzilla/show_bug.cgi?id=56687
Bug ID: 56687
Summary: ProxySourceAddress failed to bind socket to local
address
Product: Apache httpd-2
Version: 2.5-HEAD
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy_connect
Assignee: bugs@httpd.apache.org
Reporter: apache@arbruijn.dds.nl
Created attachment 31775
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31775&action=edit
patch: copy source_address in ap_proxy_connect_to_backend
When I use ProxySourceAddress together with mod_proxy_connect to proxy https
connections I get occasional error messages in error_log like:
[proxy:error] [pid 8703:tid 139730268100352] (98)Address already in use:
[client 192.168.1.192:50519] AH00938: CONNECT: failed to bind socket to local
address
and the ProxySourceAddress for that request is ignored.
The cause seems to be that ap_proxy_connect_to_backend (called by
mod_proxy_connect) calls apr_socket_bind with conf->source_address directly
passed as argument, so the selected local port is stored in
conf->source_address and used in subsequent binds. This fails if that port is
still in use.
The function ap_proxy_connect_backend (used by mod_proxy_http) makes a copy of
conf->source_address before passing it to apr_socket_bind, and when I tried
that for ap_proxy_connect_to_backend the problem disappeared (see patch).
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