Stream: proxy_requests directive.

The directive allows to drop binding between a client and existing UDP stream
session after receiving a specified number of packets.  First packet from the
same client address and port will start a new session.  Old session continues
to exist and will terminate at moment defined by configuration: either after
receiving the expected number of responses, or after timeout, as specified by
the "proxy_responses" and/or "proxy_timeout" directives.

By default, proxy_requests is zero (disabled).

1 files changed, 13 insertions, 2 deletions

diff --git a/src/event/ngx_event_udp.c b/src/event/ngx_event_udp.c
index 53b090475..65eb22fd2 100644
--- a/src/event/ngx_event_udp.c
+++ b/src/event/ngx_event_udp.c
@@ -23,7 +23,6 @@ static void ngx_close_accepted_udp_connection(ngx_connection_t *c);
 static ssize_t ngx_udp_shared_recv(ngx_connection_t *c, u_char *buf,
     size_t size);
 static ngx_int_t ngx_insert_udp_connection(ngx_connection_t *c);
-static void ngx_delete_udp_connection(void *data);
 static ngx_connection_t *ngx_lookup_udp_connection(ngx_listening_t *ls,
     struct sockaddr *sockaddr, socklen_t socklen,
     struct sockaddr *local_sockaddr, socklen_t local_socklen);
@@ -558,11 +557,15 @@ ngx_insert_udp_connection(ngx_connection_t *c)
 }
 
 
-static void
+void
 ngx_delete_udp_connection(void *data)
 {
     ngx_connection_t  *c = data;
 
+    if (c->udp == NULL) {
+        return;
+    }
+
     ngx_rbtree_delete(&c->listening->rbtree, &c->udp->node);
 
     c->udp = NULL;
@@ -643,4 +646,12 @@ ngx_lookup_udp_connection(ngx_listening_t *ls, struct sockaddr *sockaddr,
     return NULL;
 }
 
+#else
+
+void
+ngx_delete_udp_connection(void *data)
+{
+    return;
+}
+
 #endif