Add a basic regression test for sendfile() over TCP, which sends varying

lengths of headers and data and makes sure it receives about the right
number of bytes.

tools/regression/sockets/sendfile/Makefile

@@ -0,0 +1,11 @@
+#
+# $FreeBSD$
+#
+
+PROG=	sendfile
+NO_MAN=
+
+sendfile: sendfile.c
+	gcc -Wall -o sendfile sendfile.c
+
+.include <bsd.prog.mk>

tools/regression/sockets/sendfile/sendfile.c

@@ -0,0 +1,326 @@
+/*-
+ * Copyright (c) 2006 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <err.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Simple regression test for sendfile.  Creates a file sized at three pages
+ * and then proceeds to send it over a series of sockets, exercising a number
+ * of cases and performing limited validation.
+ */
+
+#define	TEST_PORT	5678
+#define	TEST_MAGIC	0x4440f7bb
+#define	TEST_PAGES	3
+#define	TEST_SECONDS	30
+
+struct test_header {
+	u_int32_t	th_magic;
+	u_int32_t	th_header_length;
+	u_int32_t	th_offset;
+	u_int32_t	th_length;
+};
+
+pid_t	child_pid, parent_pid;
+int	listen_socket;
+int	file_fd;
+
+static int
+test_th(struct test_header *th, u_int32_t *header_length, u_int32_t *offset,
+    u_int32_t *length)
+{
+
+	if (th->th_magic != htonl(TEST_MAGIC))
+		return (0);
+	*header_length = ntohl(th->th_header_length);
+	*offset = ntohl(th->th_offset);
+	*length = ntohl(th->th_length);
+	return (1);
+}
+
+static void
+signal_alarm(int signum)
+{
+
+}
+
+static void
+setup_alarm(int seconds)
+{
+
+	signal(SIGALRM, signal_alarm);
+	alarm(seconds);
+}
+
+static void
+cancel_alarm(void)
+{
+
+	alarm(0);
+	signal(SIGALRM, SIG_DFL);
+}
+
+static void
+receive_test(int accept_socket)
+{
+	u_int32_t header_length, offset, length, counter;
+	struct test_header th;
+	ssize_t len;
+	char ch;
+
+	len = read(accept_socket, &th, sizeof(th));
+	if (len < 0)
+		err(-1, "read");
+	if (len < sizeof(th))
+		errx(-1, "read: %d", len);
+
+	if (test_th(&th, &header_length, &offset, &length) == 0)
+		errx(-1, "test_th: bad");
+
+	counter = 0;
+	while (1) {
+		len = read(accept_socket, &ch, sizeof(ch));
+		if (len < 0)
+			err(-1, "read");
+		if (len == 0)
+			break;
+		counter++;
+		/* XXXRW: Validate byte here. */
+	}
+	if (counter != header_length + length)
+		errx(-1, "receive_test: expected (%d, %d) received %d",
+		    header_length, length, counter);
+}
+
+static void
+run_child(void)
+{
+	int accept_socket;
+
+	while (1) {
+		accept_socket = accept(listen_socket, NULL, NULL);	
+		setup_alarm(TEST_SECONDS);
+		receive_test(accept_socket);
+		cancel_alarm();
+		close(accept_socket);
+	}
+}
+
+static int
+new_test_socket(void)
+{
+	struct sockaddr_in sin;
+	int connect_socket;
+
+	connect_socket = socket(PF_INET, SOCK_STREAM, 0);
+	if (connect_socket < 0)
+		err(-1, "socket");
+
+	bzero(&sin, sizeof(sin));
+	sin.sin_len = sizeof(sin);
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	sin.sin_port = htons(TEST_PORT);
+
+	if (connect(connect_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
+		err(-1, "connect");
+
+	return (connect_socket);
+}
+
+static void
+init_th(struct test_header *th, u_int32_t header_length, u_int32_t offset,
+    u_int32_t length)
+{
+
+	bzero(th, sizeof(*th));
+	th->th_magic = htonl(TEST_MAGIC);
+	th->th_header_length = htonl(header_length);
+	th->th_offset = htonl(offset);
+	th->th_length = htonl(length);
+}
+
+static void
+send_test(int connect_socket, u_int32_t header_length, u_int32_t offset,
+    u_int32_t length)
+{
+	struct test_header th;
+	struct sf_hdtr hdtr, *hdtrp;
+	struct iovec headers;
+	char *header;
+	ssize_t len;
+	off_t off;
+
+	len = lseek(file_fd, 0, SEEK_SET);
+	if (len < 0)
+		err(-1, "lseek");
+	if (len != 0)
+		errx(-1, "lseek: %d", len);
+
+	init_th(&th, header_length, offset, length);
+
+	len = write(connect_socket, &th, sizeof(th));
+	if (len < 0)
+		err(-1, "send");
+	if (len != sizeof(th))
+		err(-1, "send: %d", len);
+
+	if (header_length != 0) {
+		header = malloc(header_length);
+		if (header == NULL)
+			err(-1, "malloc");
+		hdtrp = &hdtr;
+		bzero(&headers, sizeof(headers));
+		headers.iov_base = header;
+		headers.iov_len = header_length;
+		bzero(&hdtr, sizeof(hdtr));
+		hdtr.headers = &headers;
+		hdtr.hdr_cnt = 1;
+		hdtr.trailers = NULL;
+		hdtr.trl_cnt = 0;
+	} else {
+		hdtrp = NULL;
+		header = NULL;
+	}
+
+	if (sendfile(file_fd, connect_socket, offset, length, hdtrp, &off,
+	    0) < 0)
+		err(-1, "sendfile");
+
+	if (off != length)
+		errx(-1, "sendfile: off %llu", off);
+
+	if (header != NULL)
+		free(header);
+}
+
+static void
+run_parent(void)
+{
+	int connect_socket;
+
+	connect_socket = new_test_socket();
+	send_test(connect_socket, 0, 0, 1);
+	close(connect_socket);
+
+	sleep(1);
+
+	connect_socket = new_test_socket();
+	send_test(connect_socket, 0, 0, getpagesize());
+	close(connect_socket);
+
+	sleep(1);
+
+	connect_socket = new_test_socket();
+	send_test(connect_socket, 0, 1, 1);
+	close(connect_socket);
+
+	sleep(1);
+
+	connect_socket = new_test_socket();
+	send_test(connect_socket, 0, 1, getpagesize());
+	close(connect_socket);
+
+	sleep(1);
+
+	connect_socket = new_test_socket();
+	send_test(connect_socket, 0, getpagesize(), getpagesize());
+	close(connect_socket);
+
+	sleep(1);
+
+	(void)kill(child_pid, SIGKILL);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char path[PATH_MAX], *page_buffer;
+	struct sockaddr_in sin;
+	int pagesize;
+	ssize_t len;
+
+	pagesize = getpagesize();
+	page_buffer = malloc(TEST_PAGES * pagesize);
+	if (page_buffer == NULL)
+		err(-1, "malloc");
+	bzero(page_buffer, TEST_PAGES * pagesize);
+
+	listen_socket = socket(PF_INET, SOCK_STREAM, 0);
+	if (listen_socket < 0)
+		err(-1, "socket");
+
+	bzero(&sin, sizeof(sin));
+	sin.sin_len = sizeof(sin);
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	sin.sin_port = htons(TEST_PORT);
+
+	snprintf(path, PATH_MAX, "/tmp/sendfile.XXXXXXXXXXXX");
+	file_fd = mkstemp(path);
+	(void)unlink(path);
+
+	len = write(file_fd, page_buffer, TEST_PAGES * pagesize);
+	if (len < 0)
+		err(-1, "write");
+
+	len = lseek(file_fd, 0, SEEK_SET);
+	if (len < 0)
+		err(-1, "lseek");
+	if (len != 0)
+		errx(-1, "lseek: %d", len);
+
+	if (bind(listen_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
+		err(-1, "bind");
+
+	if (listen(listen_socket, -1) < 0)
+		err(-1, "listen");
+
+	parent_pid = getpid();
+	child_pid = fork();
+	if (child_pid < 0)
+		err(-1, "fork");
+	if (child_pid == 0) {
+		child_pid = getpid();
+		run_child();
+	} else
+		run_parent();
+
+	return (0);
+}