bufferevent: move conn_address out from http into bufferevent

In http the only case when when we could store it is when we already
connected, *but* if we are doing request using domain name, then we need
to do request to nameserver to get IP address, and this is handled by
bufferevent.
So when we have IP address (from nameserver) and don't have connection
to this IP address, we could already cache it to avoid extra DNS
requests (since UDP is slow), and we can't do this from http layer, only
from bufferevent.

1 files changed, 12 insertions, 0 deletions

diff --git a/bufferevent-internal.h b/bufferevent-internal.h
index ad3dcfc9..ac32384c 100644
--- a/bufferevent-internal.h
+++ b/bufferevent-internal.h
@@ -205,6 +205,15 @@ struct bufferevent_private {
 
 	/** Rate-limiting information for this bufferevent */
 	struct bufferevent_rate_limit *rate_limiting;
+
+	/* Saved conn_addr, to extract IP address from it.
+	 *
+	 * Because some servers may reset/close connection without waiting clients,
+	 * in that case we can't extract IP address even in close_cb.
+	 * So we need to save it, just after we connected to remote server, or
+	 * after resolving (to avoid extra dns requests during retrying, since UDP
+	 * is slow) */
+	struct sockaddr_storage *conn_address;
 };
 
 /** Possible operations for a control callback. */
@@ -392,6 +401,9 @@ int bufferevent_generic_adj_timeouts_(struct bufferevent *bev);
 
 enum bufferevent_options bufferevent_get_options_(struct bufferevent *bev);
 
+const struct sockaddr*
+bufferevent_socket_get_conn_address_(struct bufferevent *bev);
+
 /** Internal use: We have just successfully read data into an inbuf, so
  * reset the read timeout (if any). */
 #define BEV_RESET_GENERIC_READ_TIMEOUT(bev)				\