From: Marek Vavrusa <marek@vavrusa.com>
Date: Thu, 16 Jun 2016 17:12:51 +0000 (-0700)
Subject: daemon/worker: fix outbound TCP queries
X-Git-Tag: v1.1.0~78
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1f5e4d044f8c07e8810b9939ec4fc84addeb60ee;p=thirdparty%2Fknot-resolver.git

daemon/worker: fix outbound TCP queries

previously the buffer for TCP pkt reassembly was
not correctly cleared and fragmented answers
were rejected
---

diff --git a/daemon/worker.c b/daemon/worker.c
index 888e5adc9..00de593cc 100644
--- a/daemon/worker.c
+++ b/daemon/worker.c
@@ -395,6 +395,13 @@ static int qr_task_on_send(struct qr_task *task, uv_handle_t *handle, int status
 {
 	if (!task->finished) {
 		if (status == 0 && handle) {
+			/* For TCP we can be sure there will be no retransmit, so we flush
+			 * the packet buffer so it can be reused again for reassembly. */
+			if (handle->type == UV_TCP) {
+				knot_pkt_t *pktbuf = task->pktbuf;
+				knot_pkt_clear(pktbuf);
+				pktbuf->size = 0;
+			}
 			io_start_read(handle); /* Start reading new query */
 		}
 	} else {