// SPDX-License-Identifier: GPL-2.0/* Copyright Amazon.com Inc. or its affiliates. */ #include <sys/socket.h>#include <netinet/in.h> #include "kselftest_harness.h" FIXTURE(bind_timewait){	struct sockaddr_in addr;	socklen_t addrlen;}; FIXTURE_VARIANT(bind_timewait){	__u32 addr_const;}; FIXTURE_VARIANT_ADD(bind_timewait, localhost){	.addr_const = INADDR_LOOPBACK}; FIXTURE_VARIANT_ADD(bind_timewait, addrany){	.addr_const = INADDR_ANY}; FIXTURE_SETUP(bind_timewait){	self->addr.sin_family = AF_INET;	self->addr.sin_port = 0;	self->addr.sin_addr.s_addr = htonl(variant->addr_const);	self->addrlen = sizeof(self->addr);} FIXTURE_TEARDOWN(bind_timewait){} void create_timewait_socket(struct __test_metadata *_metadata,			    FIXTURE_DATA(bind_timewait) *self){	int server_fd, client_fd, child_fd, ret;	struct sockaddr_in addr;	socklen_t addrlen; 	server_fd = socket(AF_INET, SOCK_STREAM, 0);	ASSERT_GT(server_fd, 0); 	ret = bind(server_fd, (struct sockaddr *)&self->addr, self->addrlen);	ASSERT_EQ(ret, 0); 	ret = listen(server_fd, 1);	ASSERT_EQ(ret, 0); 	ret = getsockname(server_fd, (struct sockaddr *)&self->addr, &self->addrlen);	ASSERT_EQ(ret, 0); 	client_fd = socket(AF_INET, SOCK_STREAM, 0);	ASSERT_GT(client_fd, 0); 	ret = connect(client_fd, (struct sockaddr *)&self->addr, self->addrlen);	ASSERT_EQ(ret, 0); 	addrlen = sizeof(addr);	child_fd = accept(server_fd, (struct sockaddr *)&addr, &addrlen);	ASSERT_GT(child_fd, 0); 	close(child_fd);	close(client_fd);	close(server_fd);} TEST_F(bind_timewait, 1){	int fd, ret; 	create_timewait_socket(_metadata, self); 	fd = socket(AF_INET, SOCK_STREAM, 0);	ASSERT_GT(fd, 0); 	ret = bind(fd, (struct sockaddr *)&self->addr, self->addrlen);	ASSERT_EQ(ret, -1);	ASSERT_EQ(errno, EADDRINUSE); 	close(fd);} TEST_HARNESS_MAIN