/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Netflix, Inc.
*
* 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.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int ls;
static char buf[1024*1024];
static volatile bool accept_done = false;
static volatile bool read_done = false;
static void *
server(void *arg)
{
struct sockaddr_in sin;
ssize_t rv;
socklen_t slen;
int ss;
ssize_t readlen = (uintptr_t)arg;
slen = sizeof(sin);
ss = accept(ls, (void *)&sin, &slen);
if (ss < 0)
err(1, "accept ls");
accept_done = true;
do {
rv = read(ss, buf, sizeof(buf));
if (rv == -1)
err(2, "read receiver");
if (rv == 0)
break;
readlen -= rv;
} while (readlen != 0);
read_done = true;
return NULL;
}
int
main(int argc, char **argv)
{
pthread_t pt;
struct sockaddr_in sin;
off_t start, len;
socklen_t slen;
int fd, cs, on, flags, error;
if (argc != 5)
errx(1, "usage: %s <file> <start> <len> <flags>",
getprogname());
start = strtoull(argv[2], NULL, 0);
len = strtoull(argv[3], NULL, 0);
flags = strtoul(argv[4], NULL, 0);
fd = open(argv[1], O_RDONLY);
if (fd < 0)
err(1, "open");
ls = socket(PF_INET, SOCK_STREAM, 0);
if (ls < 0)
err(1, "socket ls");
on = 1;
if (setsockopt(ls, SOL_SOCKET, SO_REUSEADDR, (void *)&on,
(socklen_t)sizeof(on)) < 0)
err(1, "SO_REUSEADDR");
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = 0;
if (bind(ls, (void *)&sin, sizeof(sin)) < 0)
err(1, "bind ls");
slen = sizeof(sin);
if (getsockname(ls, (void *)&sin, &slen) < 0)
err(1, "getsockname");
if (listen(ls, 5) < 0)
err(1, "listen ls");
error = pthread_create(&pt, NULL, server, (void *)(uintptr_t)len);
if (error)
errc(1, error, "pthread_create");
cs = socket(PF_INET, SOCK_STREAM, 0);
if (cs < 0)
err(1, "socket cs");
if (connect(cs, (void *)&sin, sizeof(sin)) < 0)
err(1, "connect cs");
while (!accept_done)
usleep(1000);
if (sendfile(fd, cs, start, len, NULL, NULL, flags) < 0)
err(3, "sendfile");
while (!read_done)
usleep(1000);
exit(0);
}
