linux-kernel - [PATCH liburing v1 11/12] t/232c93d07b74: Don't use a static port number

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Date:   Fri,  2 Sep 2022 07:59:45 +0700
From:   Ammar Faizi <ammarfaizi2@...weeb.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Ammar Faizi <ammarfaizi2@...weeb.org>,
        Dylan Yudaken <dylany@...com>,
        Facebook Kernel Team <kernel-team@...com>,
        Pavel Begunkov <asml.silence@...il.com>,
        Kanna Scarlet <knscarlet@...weeb.org>,
        Muhammad Rizki <kiizuha@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        io-uring Mailing List <io-uring@...r.gnuweeb.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH liburing v1 11/12] t/232c93d07b74: Don't use a static port number

From: Ammar Faizi <ammarfaizi2@...weeb.org>

Don't use a static port number. It might already be in use, resulting
in a test failure. Use an ephemeral port to make this test reliable.

Cc: Dylan Yudaken <dylany@...com>
Cc: Facebook Kernel Team <kernel-team@...com>
Cc: Pavel Begunkov <asml.silence@...il.com>
Signed-off-by: Ammar Faizi <ammarfaizi2@...weeb.org>
---
 test/232c93d07b74.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/test/232c93d07b74.c b/test/232c93d07b74.c
index c99491f..74cc063 100644
--- a/test/232c93d07b74.c
+++ b/test/232c93d07b74.c
@@ -17,31 +17,30 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <netinet/tcp.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include "helpers.h"
 #include "liburing.h"
 
 #define RECV_BUFF_SIZE 2
 #define SEND_BUFF_SIZE 3
 
-#define PORT	0x1234
-
 struct params {
 	int tcp;
 	int non_blocking;
+	__be16 bind_port;
 };
 
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
 int rcv_ready = 0;
 
 static void set_rcv_ready(void)
 {
 	pthread_mutex_lock(&mutex);
 
 	rcv_ready = 1;
 	pthread_cond_signal(&cond);
 
@@ -67,30 +66,29 @@ static void *rcv(void *arg)
 	if (p->tcp) {
 		int val = 1;
                 
 
 		s0 = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
 		res = setsockopt(s0, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
 		assert(res != -1);
 		res = setsockopt(s0, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
 		assert(res != -1);
 
 		struct sockaddr_in addr;
 
 		addr.sin_family = AF_INET;
-		addr.sin_port = htons(PORT);
 		addr.sin_addr.s_addr = inet_addr("127.0.0.1");
-		res = bind(s0, (struct sockaddr *) &addr, sizeof(addr));
-		assert(res != -1);
+		assert(t_bind_ephemeral_port(s0, &addr) == 0);
+		p->bind_port = addr.sin_port;
 	} else {
 		s0 = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
 		assert(s0 != -1);
 
 		struct sockaddr_un addr;
 		memset(&addr, 0, sizeof(addr));
 
 		addr.sun_family = AF_UNIX;
 		memcpy(addr.sun_path, "\0sock", 6);
 		res = bind(s0, (struct sockaddr *) &addr, sizeof(addr));
 		assert(res != -1);
 	}
 	res = listen(s0, 128);
@@ -182,27 +180,27 @@ static void *snd(void *arg)
 
 	wait_for_rcv_ready();
 
 	if (p->tcp) {
 		int val = 1;
 
 		s0 = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
 		ret = setsockopt(s0, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
 		assert(ret != -1);
 
 		struct sockaddr_in addr;
 
 		addr.sin_family = AF_INET;
-		addr.sin_port = htons(PORT);
+		addr.sin_port = p->bind_port;
 		addr.sin_addr.s_addr = inet_addr("127.0.0.1");
 		ret = connect(s0, (struct sockaddr*) &addr, sizeof(addr));
 		assert(ret != -1);
 	} else {
 		s0 = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
 		assert(s0 != -1);
 
 		struct sockaddr_un addr;
 		memset(&addr, 0, sizeof(addr));
 
 		addr.sun_family = AF_UNIX;
 		memcpy(addr.sun_path, "\0sock", 6);
 		ret = connect(s0, (struct sockaddr*) &addr, sizeof(addr));
-- 
Ammar Faizi