Generate error for unsupported IPv6 transparent proxy.
On some platforms (for example, Linux with glibc 2.12-2.25) IPv4 transparent
proxying is available, but IPv6 transparent proxying is not. The entire feature
is enabled in this case and NGX_HAVE_TRANSPARENT_PROXY macro is set to 1.
Previously, an attempt to enable transparency for an IPv6 socket was silently
ignored in this case and was usually followed by a bind(2) EADDRNOTAVAIL error
(ticket #1487). Now the error is generated for unavailable IPv6 transparent
proxy.
diff --git a/src/event/ngx_event_connect.c b/src/event/ngx_event_connect.c
index c5bb806..e7f28c9 100644
--- a/src/event/ngx_event_connect.c
+++ b/src/event/ngx_event_connect.c
@@ -388,7 +388,16 @@
return NGX_ERROR;
}
+#else
+
+ ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
+ "could not enable transparent proxying for IPv6 "
+ "on this platform");
+
+ return NGX_ERROR;
+
#endif
+
break;
#endif /* NGX_HAVE_INET6 */
