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rt-thread-official/components/net/lwip/lwip-2.1.2/test/sockets/sockets_stresstest.c

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/**
* @file
* Sockets stresstest
*
* This file uses the lwIP socket API to do stress tests that should test the
* stability when used in many different situations, with many concurrent
* sockets making concurrent transfers in different manners.
*
* - test rely on loopback sockets for now, so netif drivers are not tested
* - all enabled functions shall be used
* - parallelism of the tests depend on enough resources being available
* (configure your lwipopts.h settings high enough)
* - test should also be able to run in a real target
*
* TODO:
* - full duplex
* - add asserts about internal socket/netconn/pcb state?
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#include "lwip/opt.h"
#include "sockets_stresstest.h"
#include "lwip/sockets.h"
#include "lwip/sys.h"
#include "lwip/mem.h"
#include <stdio.h>
#include <string.h>
#if LWIP_SOCKET && LWIP_IPV4 /* this uses IPv4 loopback sockets, currently */
#ifndef TEST_SOCKETS_STRESS
#define TEST_SOCKETS_STRESS LWIP_DBG_OFF
#endif
#define TEST_TIME_SECONDS 10
#define TEST_TXRX_BUFSIZE (TCP_MSS * 2)
#define TEST_MAX_RXWAIT_MS 50
#define TEST_MAX_CONNECTIONS 50
#define TEST_SOCK_READABLE 0x01
#define TEST_SOCK_WRITABLE 0x02
#define TEST_SOCK_ERR 0x04
#define TEST_MODE_SELECT 0x01
#define TEST_MODE_POLL 0x02
#define TEST_MODE_NONBLOCKING 0x04
#define TEST_MODE_WAIT 0x08
#define TEST_MODE_RECVTIMEO 0x10
#define TEST_MODE_SLEEP 0x20
static int sockets_stresstest_numthreads;
struct test_settings {
struct sockaddr_storage addr;
int start_client;
int loop_cnt;
};
struct sockets_stresstest_fullduplex {
int s;
volatile int closed;
};
static void
fill_test_data(void *buf, size_t buf_len_bytes)
{
u8_t *p = (u8_t*)buf;
u16_t i, chk;
LWIP_ASSERT("buffer too short", buf_len_bytes >= 4);
LWIP_ASSERT("buffer too big", buf_len_bytes <= 0xFFFF);
/* store the total number of bytes */
p[0] = (u8_t)(buf_len_bytes >> 8);
p[1] = (u8_t)buf_len_bytes;
/* fill buffer with random */
chk = 0;
for (i = 4; i < buf_len_bytes; i++) {
u8_t rnd = (u8_t)LWIP_RAND();
p[i] = rnd;
chk += rnd;
}
/* store checksum */
p[2] = (u8_t)(chk >> 8);
p[3] = (u8_t)chk;
}
static size_t
check_test_data(const void *buf, size_t buf_len_bytes)
{
u8_t *p = (u8_t*)buf;
u16_t i, chk, chk_rx, len_rx;
LWIP_ASSERT("buffer too short", buf_len_bytes >= 4);
len_rx = (((u16_t)p[0]) << 8) | p[1];
LWIP_ASSERT("len too short", len_rx >= 4);
if (len_rx > buf_len_bytes) {
/* not all data received in this segment */
LWIP_DEBUGF(TEST_SOCKETS_STRESS | LWIP_DBG_TRACE, ("check-\n"));
return buf_len_bytes;
}
chk_rx = (((u16_t)p[2]) << 8) | p[3];
/* calculate received checksum */
chk = 0;
for (i = 4; i < len_rx; i++) {
chk += p[i];
}
LWIP_ASSERT("invalid checksum", chk == chk_rx);
if (len_rx < buf_len_bytes) {
size_t data_left = buf_len_bytes - len_rx;
memmove(p, &p[len_rx], data_left);
return data_left;
}
/* if we come here, we received exactly one chunk
-> next offset is 0 */
return 0;
}
static size_t
recv_and_check_data_return_offset(int s, char *rxbuf, size_t rxbufsize, size_t rxoff, int *closed, const char *dbg)
{
ssize_t ret;
ret = lwip_read(s, &rxbuf[rxoff], rxbufsize - rxoff);
if (ret == 0) {
*closed = 1;
return rxoff;
}
*closed = 0;
LWIP_DEBUGF(TEST_SOCKETS_STRESS | LWIP_DBG_TRACE, ("%s %d rx %d\n", dbg, s, (int)ret));
if (ret == -1) {
/* TODO: for this to work, 'errno' has to support multithreading... */
int err = errno;
if (err == ENOTCONN) {
*closed = 1;
return 0;
}
LWIP_ASSERT("err == 0", err == 0);
}
LWIP_ASSERT("ret > 0", ret > 0);
return check_test_data(rxbuf, rxoff + ret);
}
#if LWIP_SOCKET_SELECT
static int
sockets_stresstest_wait_readable_select(int s, int timeout_ms)
{
int ret;
struct timeval tv;
fd_set fs_r;
fd_set fs_w;
fd_set fs_e;
FD_ZERO(&fs_r);
FD_ZERO(&fs_w);
FD_ZERO(&fs_e);
FD_SET(s, &fs_r);
FD_SET(s, &fs_e);
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms - (tv.tv_sec * 1000)) * 1000;
ret = lwip_select(s + 1, &fs_r, &fs_w, &fs_e, &tv);
LWIP_ASSERT("select error", ret >= 0);
if (ret) {
/* convert poll flags to our flags */
ret = 0;
if (FD_ISSET(s, &fs_r)) {
ret |= TEST_SOCK_READABLE;
}
if (FD_ISSET(s, &fs_w)) {
ret |= TEST_SOCK_WRITABLE;
}
if (FD_ISSET(s, &fs_e)) {
ret |= TEST_SOCK_ERR;
}
return ret;
}
return 0;
}
#endif
#if LWIP_SOCKET_POLL
static int
sockets_stresstest_wait_readable_poll(int s, int timeout_ms)
{
int ret;
struct pollfd pfd;
pfd.fd = s;
pfd.revents = 0;
pfd.events = POLLIN | POLLERR;
ret = lwip_poll(&pfd, 1, timeout_ms);
if (ret) {
/* convert poll flags to our flags */
ret = 0;
if (pfd.revents & POLLIN) {
ret |= TEST_SOCK_READABLE;
}
if (pfd.revents & POLLOUT) {
ret |= TEST_SOCK_WRITABLE;
}
if (pfd.revents & POLLERR) {
ret |= TEST_SOCK_ERR;
}
return ret;
}
return 0;
}
#endif
#if LWIP_SO_RCVTIMEO
static int
sockets_stresstest_wait_readable_recvtimeo(int s, int timeout_ms)
{
int ret;
char buf;
#if LWIP_SO_SNDRCVTIMEO_NONSTANDARD
int opt_on = timeout_ms;
int opt_off = 0;
#else
struct timeval opt_on, opt_off;
opt_on.tv_sec = timeout_ms / 1000;
opt_on.tv_usec = (timeout_ms - (opt_on.tv_sec * 1000)) * 1000;
opt_off.tv_sec = 0;
opt_off.tv_usec = 0;
#endif
/* enable receive timeout */
ret = lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &opt_on, sizeof(opt_on));
LWIP_ASSERT("setsockopt error", ret == 0);
/* peek for one byte with timeout */
ret = lwip_recv(s, &buf, 1, MSG_PEEK);
/* disable receive timeout */
ret = lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &opt_off, sizeof(opt_off));
LWIP_ASSERT("setsockopt error", ret == 0);
if (ret == 1) {
return TEST_SOCK_READABLE;
}
if (ret == 0) {
return 0;
}
if (ret == -1) {
return TEST_SOCK_ERR;
}
LWIP_ASSERT("invalid return value", 0);
return TEST_SOCK_ERR;
}
#endif
static int
sockets_stresstest_wait_readable_wait_peek(int s, int timeout_ms)
{
int ret;
char buf;
LWIP_UNUSED_ARG(timeout_ms); /* cannot time out here */
/* peek for one byte */
ret = lwip_recv(s, &buf, 1, MSG_PEEK);
if (ret == 1) {
return TEST_SOCK_READABLE;
}
if (ret == 0) {
return 0;
}
if (ret == -1) {
return TEST_SOCK_ERR;
}
LWIP_ASSERT("invalid return value", 0);
return TEST_SOCK_ERR;
}
static int
sockets_stresstest_wait_readable_nonblock(int s, int timeout_ms)
{
int ret;
char buf;
u32_t wait_until = sys_now() + timeout_ms;
while(sys_now() < wait_until) {
/* peek for one byte */
ret = lwip_recv(s, &buf, 1, MSG_PEEK | MSG_DONTWAIT);
if (ret == 1) {
return TEST_SOCK_READABLE;
}
if (ret == -1) {
/* TODO: for this to work, 'errno' has to support multithreading... */
int err = errno;
if (err != EWOULDBLOCK) {
return TEST_SOCK_ERR;
}
}
/* TODO: sleep? */
}
return 0;
}
static int sockets_stresstest_rand_mode(int allow_wait, int allow_rx)
{
u32_t random_value = LWIP_RAND();
#if LWIP_SOCKET_SELECT
if (random_value & TEST_MODE_SELECT) {
return TEST_MODE_SELECT;
}
#endif
#if LWIP_SOCKET_POLL
if (random_value & TEST_MODE_POLL) {
return TEST_MODE_POLL;
}
#endif
if (!allow_rx) {
return TEST_MODE_SLEEP;
}
#if LWIP_SO_RCVTIMEO
if (random_value & TEST_MODE_RECVTIMEO) {
return TEST_MODE_RECVTIMEO;
}
#endif
if (allow_wait) {
if (random_value & TEST_MODE_RECVTIMEO) {
return TEST_MODE_RECVTIMEO;
}
}
return TEST_MODE_NONBLOCKING;
}
static int
sockets_stresstest_wait_readable(int mode, int s, int timeout_ms)
{
switch(mode)
{
#if LWIP_SOCKET_SELECT
case TEST_MODE_SELECT:
return sockets_stresstest_wait_readable_select(s, timeout_ms);
#endif
#if LWIP_SOCKET_POLL
case TEST_MODE_POLL:
return sockets_stresstest_wait_readable_poll(s, timeout_ms);
#endif
#if LWIP_SO_RCVTIMEO
case TEST_MODE_RECVTIMEO:
return sockets_stresstest_wait_readable_recvtimeo(s, timeout_ms);
#endif
case TEST_MODE_WAIT:
return sockets_stresstest_wait_readable_wait_peek(s, timeout_ms);
case TEST_MODE_NONBLOCKING:
return sockets_stresstest_wait_readable_nonblock(s, timeout_ms);
case TEST_MODE_SLEEP:
{
sys_msleep(timeout_ms);
return 1;
}
default:
LWIP_ASSERT("invalid mode", 0);
break;
}
return 0;
}
#if LWIP_NETCONN_FULLDUPLEX
static void
sockets_stresstest_conn_client_r(void *arg)
{
struct sockets_stresstest_fullduplex *fd = (struct sockets_stresstest_fullduplex *)arg;
int s = fd->s;
size_t rxoff = 0;
char rxbuf[TEST_TXRX_BUFSIZE];
while (1) {
int closed;
if (fd->closed) {
break;
}
rxoff = recv_and_check_data_return_offset(s, rxbuf, sizeof(rxbuf), rxoff, &closed, "cli");
if (fd->closed) {
break;
}
if (closed) {
lwip_close(s);
break;
}
}
SYS_ARCH_DEC(sockets_stresstest_numthreads, 1);
LWIP_ASSERT("", sockets_stresstest_numthreads >= 0);
}
#endif
static void
sockets_stresstest_conn_client(void *arg)
{
struct sockaddr_storage addr;
struct sockaddr_in *addr_in;
int s, ret;
char txbuf[TEST_TXRX_BUFSIZE];
char rxbuf[TEST_TXRX_BUFSIZE];
size_t rxoff = 0;
u32_t max_time = sys_now() + (TEST_TIME_SECONDS * 1000);
int do_rx = 1;
struct sockets_stresstest_fullduplex *data = NULL;
memcpy(&addr, arg, sizeof(addr));
LWIP_ASSERT("", addr.ss_family == AF_INET);
addr_in = (struct sockaddr_in *)&addr;
addr_in->sin_addr.s_addr = inet_addr("127.0.0.1");
/* sleep a random time between 1 and 2 seconds */
sys_msleep(1000 + (LWIP_RAND() % 1000));
/* connect to the server */
s = lwip_socket(addr.ss_family, SOCK_STREAM, 0);
LWIP_ASSERT("s >= 0", s >= 0);
#if LWIP_NETCONN_FULLDUPLEX
if (LWIP_RAND() & 1) {
sys_thread_t t;
data = (struct sockets_stresstest_fullduplex*)mem_malloc(sizeof(struct sockets_stresstest_fullduplex));
LWIP_ASSERT("data != NULL", data != 0);
SYS_ARCH_INC(sockets_stresstest_numthreads, 1);
data->s = s;
data->closed = 0;
t = sys_thread_new("sockets_stresstest_conn_client_r", sockets_stresstest_conn_client_r, data, 0, 0);
LWIP_ASSERT("thread != NULL", t != 0);
do_rx = 0;
}
#endif
/* @todo: nonblocking connect? */
ret = lwip_connect(s, (struct sockaddr *)&addr, sizeof(struct sockaddr_storage));
LWIP_ASSERT("ret == 0", ret == 0);
while (sys_now() < max_time) {
int closed;
int mode = sockets_stresstest_rand_mode(0, do_rx);
int timeout_ms = LWIP_RAND() % TEST_MAX_RXWAIT_MS;
ret = sockets_stresstest_wait_readable(mode, s, timeout_ms);
if (ret) {
if (do_rx) {
/* read some */
LWIP_ASSERT("readable", ret == TEST_SOCK_READABLE);
rxoff = recv_and_check_data_return_offset(s, rxbuf, sizeof(rxbuf), rxoff, &closed, "cli");
LWIP_ASSERT("client got closed", !closed);
}
} else {
/* timeout, send some */
size_t send_len = (LWIP_RAND() % (sizeof(txbuf) - 4)) + 4;
fill_test_data(txbuf, send_len);
LWIP_DEBUGF(TEST_SOCKETS_STRESS | LWIP_DBG_TRACE, ("cli %d tx %d\n", s, (int)send_len));
ret = lwip_write(s, txbuf, send_len);
if (ret == -1) {
/* TODO: for this to work, 'errno' has to support multithreading... */
int err = errno;
LWIP_ASSERT("err == 0", err == 0);
}
LWIP_ASSERT("ret == send_len", ret == (int)send_len);
}
}
if (data) {
data->closed = 1;
}
ret = lwip_close(s);
LWIP_ASSERT("ret == 0", ret == 0);
SYS_ARCH_DEC(sockets_stresstest_numthreads, 1);
LWIP_ASSERT("", sockets_stresstest_numthreads >= 0);
}
static void
sockets_stresstest_conn_server(void *arg)
{
int s, ret;
char txbuf[TEST_TXRX_BUFSIZE];
char rxbuf[TEST_TXRX_BUFSIZE];
size_t rxoff = 0;
s = (int)arg;
while (1) {
int closed;
int mode = sockets_stresstest_rand_mode(1, 1);
int timeout_ms = LWIP_RAND() % TEST_MAX_RXWAIT_MS;
ret = sockets_stresstest_wait_readable(mode, s, timeout_ms);
if (ret) {
if (ret & TEST_SOCK_ERR) {
/* closed? */
break;
}
/* read some */
LWIP_ASSERT("readable", ret == TEST_SOCK_READABLE);
rxoff = recv_and_check_data_return_offset(s, rxbuf, sizeof(rxbuf), rxoff, &closed, "srv");
if (closed) {
break;
}
} else {
/* timeout, send some */
size_t send_len = (LWIP_RAND() % (sizeof(txbuf) - 4)) + 4;
fill_test_data(txbuf, send_len);
LWIP_DEBUGF(TEST_SOCKETS_STRESS | LWIP_DBG_TRACE, ("srv %d tx %d\n", s, (int)send_len));
ret = lwip_write(s, txbuf, send_len);
if (ret == -1) {
/* TODO: for this to work, 'errno' has to support multithreading... */
int err = errno;
if (err == ECONNRESET) {
break;
}
if (err == ENOTCONN) {
break;
}
LWIP_ASSERT("unknown error", 0);
}
LWIP_ASSERT("ret == send_len", ret == (int)send_len);
}
}
ret = lwip_close(s);
LWIP_ASSERT("ret == 0", ret == 0);
SYS_ARCH_DEC(sockets_stresstest_numthreads, 1);
LWIP_ASSERT("", sockets_stresstest_numthreads >= 0);
}
static int
sockets_stresstest_start_clients(const struct sockaddr_storage *remote_addr)
{
/* limit the number of connections */
const int max_connections = LWIP_MIN(TEST_MAX_CONNECTIONS, MEMP_NUM_TCP_PCB/3);
int i;
for (i = 0; i < max_connections; i++) {
sys_thread_t t;
SYS_ARCH_INC(sockets_stresstest_numthreads, 1);
t = sys_thread_new("sockets_stresstest_conn_client", sockets_stresstest_conn_client, (void*)remote_addr, 0, 0);
LWIP_ASSERT("thread != NULL", t != 0);
}
return max_connections;
}
static void
sockets_stresstest_listener(void *arg)
{
int slisten;
int ret;
struct sockaddr_storage addr;
socklen_t addr_len;
struct test_settings *settings = (struct test_settings *)arg;
int num_clients, num_servers = 0;
slisten = lwip_socket(AF_INET, SOCK_STREAM, 0);
LWIP_ASSERT("slisten >= 0", slisten >= 0);
memcpy(&addr, &settings->addr, sizeof(struct sockaddr_storage));
ret = lwip_bind(slisten, (struct sockaddr *)&addr, sizeof(addr));
LWIP_ASSERT("ret == 0", ret == 0);
ret = lwip_listen(slisten, 0);
LWIP_ASSERT("ret == 0", ret == 0);
addr_len = sizeof(addr);
ret = lwip_getsockname(slisten, (struct sockaddr *)&addr, &addr_len);
LWIP_ASSERT("ret == 0", ret == 0);
num_clients = sockets_stresstest_start_clients(&addr);
while (num_servers < num_clients) {
struct sockaddr_storage aclient;
socklen_t aclient_len = sizeof(aclient);
int sclient = lwip_accept(slisten, (struct sockaddr *)&aclient, &aclient_len);
#if 1
/* using server threads */
{
sys_thread_t t;
SYS_ARCH_INC(sockets_stresstest_numthreads, 1);
num_servers++;
t = sys_thread_new("sockets_stresstest_conn_server", sockets_stresstest_conn_server, (void*)sclient, 0, 0);
LWIP_ASSERT("thread != NULL", t != 0);
}
#else
/* using server select */
#endif
}
LWIP_DEBUGF(TEST_SOCKETS_STRESS | LWIP_DBG_STATE, ("sockets_stresstest_listener: all %d connections established\n", num_clients));
/* accepted all clients */
while (sockets_stresstest_numthreads > 0) {
sys_msleep(1);
}
ret = lwip_close(slisten);
LWIP_ASSERT("ret == 0", ret == 0);
LWIP_DEBUGF(TEST_SOCKETS_STRESS |LWIP_DBG_STATE, ("sockets_stresstest_listener: done\n"));
}
static void
sockets_stresstest_listener_loop(void *arg)
{
int i;
struct test_settings *settings = (struct test_settings *)arg;
if (settings->loop_cnt) {
for (i = 0; i < settings->loop_cnt; i++) {
LWIP_DEBUGF(TEST_SOCKETS_STRESS |LWIP_DBG_STATE, ("sockets_stresstest_listener_loop: iteration %d\n", i));
sockets_stresstest_listener(arg);
sys_msleep(2);
}
LWIP_DEBUGF(TEST_SOCKETS_STRESS |LWIP_DBG_STATE, ("sockets_stresstest_listener_loop: done\n"));
} else {
for (i = 0; ; i++) {
LWIP_DEBUGF(TEST_SOCKETS_STRESS |LWIP_DBG_STATE, ("sockets_stresstest_listener_loop: iteration %d\n", i));
sockets_stresstest_listener(arg);
sys_msleep(2);
}
}
}
void
sockets_stresstest_init_loopback(int addr_family)
{
sys_thread_t t;
struct test_settings *settings = (struct test_settings *)mem_malloc(sizeof(struct test_settings));
LWIP_ASSERT("OOM", settings != NULL);
memset(settings, 0, sizeof(struct test_settings));
#if LWIP_IPV4 && LWIP_IPV6
LWIP_ASSERT("invalid addr_family", (addr_family == AF_INET) || (addr_family == AF_INET6));
#endif
settings->addr.ss_family = (sa_family_t)addr_family;
LWIP_UNUSED_ARG(addr_family);
settings->start_client = 1;
t = sys_thread_new("sockets_stresstest_listener_loop", sockets_stresstest_listener_loop, settings, 0, 0);
LWIP_ASSERT("thread != NULL", t != 0);
}
void
sockets_stresstest_init_server(int addr_family, u16_t server_port)
{
sys_thread_t t;
struct test_settings *settings = (struct test_settings *)mem_malloc(sizeof(struct test_settings));
LWIP_ASSERT("OOM", settings != NULL);
memset(settings, 0, sizeof(struct test_settings));
#if LWIP_IPV4 && LWIP_IPV6
LWIP_ASSERT("invalid addr_family", (addr_family == AF_INET) || (addr_family == AF_INET6));
settings->addr.ss_family = (sa_family_t)addr_family;
#endif
LWIP_UNUSED_ARG(addr_family);
((struct sockaddr_in *)(&settings->addr))->sin_port = server_port;
t = sys_thread_new("sockets_stresstest_listener", sockets_stresstest_listener, settings, 0, 0);
LWIP_ASSERT("thread != NULL", t != 0);
}
void
sockets_stresstest_init_client(const char *remote_ip, u16_t remote_port)
{
#if LWIP_IPV4
ip4_addr_t ip4;
#endif
#if LWIP_IPV6
ip6_addr_t ip6;
#endif
struct sockaddr_storage *addr = (struct sockaddr_storage *)mem_malloc(sizeof(struct sockaddr_storage));
LWIP_ASSERT("OOM", addr != NULL);
memset(addr, 0, sizeof(struct test_settings));
#if LWIP_IPV4
if (ip4addr_aton(remote_ip, &ip4)) {
addr->ss_family = AF_INET;
((struct sockaddr_in *)addr)->sin_addr.s_addr = ip4_addr_get_u32(&ip4);
}
#endif
#if LWIP_IPV4 && LWIP_IPV6
else
#endif
#if LWIP_IPV6
if (ip6addr_aton(remote_ip, &ip6)) {
addr->ss_family = AF_INET6;
/* todo: copy ipv6 address */
}
#endif
((struct sockaddr_in *)addr)->sin_port = remote_port;
sockets_stresstest_start_clients(addr);
}
#endif /* LWIP_SOCKET && LWIP_IPV4 */
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