[MINOR] session: add a pointer to the new target into the session
When dealing with HTTP keep-alive, we'll have to know if we can reuse
an existing connection. For that, we'll have to check if the current
connection was made on the exact same target (referenced in the stream
interface).
Thus, we need to first assign the next target to the session, then
copy it to the stream interface upon connect(). Later we'll check for
equivalence between those two operations.
diff --git a/src/backend.c b/src/backend.c
index 857496c..bd9ee14 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -452,7 +452,7 @@
* It is illegal to call this function with a session in a queue.
*
* It may return :
- * SRV_STATUS_OK if everything is OK. Session assigned to ->srv
+ * SRV_STATUS_OK if everything is OK. ->srv and ->target are assigned.
* SRV_STATUS_NOSRV if no server is available. Session is not ASSIGNED
* SRV_STATUS_FULL if all servers are saturated. Session is not ASSIGNED
* SRV_STATUS_INTERNAL for other unrecoverable errors.
@@ -492,6 +492,9 @@
*/
s->srv = NULL;
+ s->target.type = TARG_TYPE_NONE;
+ s->target.ptr.v = NULL;
+
if (s->be->lbprm.algo & BE_LB_KIND) {
int len;
/* we must check if we have at least one server available */
@@ -612,14 +615,20 @@
s->be->counters.cum_lbconn++;
s->srv->counters.cum_lbconn++;
}
+
+ s->target.type = TARG_TYPE_SERVER;
+ s->target.ptr.s = s->srv;
}
- else if (s->be->options & PR_O_HTTP_PROXY) {
- if (!s->req->cons->addr.s.to.sin_addr.s_addr) {
- err = SRV_STATUS_NOSRV;
- goto out;
- }
+ else if ((s->be->options2 & PR_O2_DISPATCH) || (s->be->options & PR_O_TRANSP)) {
+ s->target.type = TARG_TYPE_PROXY;
+ s->target.ptr.p = s->be;
}
- else if (!(s->be->options2 & PR_O2_DISPATCH) && !(s->be->options & PR_O_TRANSP)) {
+ else if ((s->be->options & PR_O_HTTP_PROXY) && s->req->cons->addr.s.to.sin_addr.s_addr) {
+ /* in proxy mode, we need a valid destination address */
+ s->target.type = TARG_TYPE_PROXY;
+ s->target.ptr.p = s->be;
+ }
+ else {
err = SRV_STATUS_NOSRV;
goto out;
}
@@ -910,7 +919,8 @@
/*
* This function initiates a connection to the server assigned to this session
- * (s->srv, s->req->cons->addr.s.to). It will assign a server if none is assigned yet.
+ * (s->srv, s->target, s->req->cons->addr.s.to). It will assign a server if none
+ * is assigned yet.
* It can return one of :
* - SN_ERR_NONE if everything's OK
* - SN_ERR_SRVTO if there are no more servers
@@ -932,16 +942,13 @@
/* Prepare the stream interface for a TCP connection. Later
* we may assign a protocol-specific connect() function.
+ * NOTE: when we later support HTTP keep-alive, we'll have to
+ * decide here if we can reuse the connection by comparing the
+ * session's freshly assigned target with the stream interface's.
*/
stream_sock_prepare_interface(s->req->cons);
s->req->cons->connect = tcpv4_connect_server;
- if (s->srv) {
- s->req->cons->target.type = TARG_TYPE_SERVER;
- s->req->cons->target.ptr.s = s->srv;
- } else {
- s->req->cons->target.type = TARG_TYPE_PROXY;
- s->req->cons->target.ptr.p = s->be;
- }
+ s->req->cons->target = s->target;
assign_tproxy_address(s);
@@ -1098,12 +1105,16 @@
if (*p != '.')
goto no_cookie;
+ s->target.type = TARG_TYPE_NONE;
+ s->target.ptr.v = NULL;
while (srv) {
if (memcmp(&addr, &(srv->addr), sizeof(addr)) == 0) {
if ((srv->state & SRV_RUNNING) || (px->options & PR_O_PERSIST)) {
/* we found the server and it is usable */
s->flags |= SN_DIRECT | SN_ASSIGNED;
s->srv = srv;
+ s->target.type = TARG_TYPE_SERVER;
+ s->target.ptr.s = s->srv;
break;
}
}