BadVPN – Rev 1
?pathlinks?
/**
* @file
* lwIP iPerf server implementation
*/
/**
* @defgroup iperf Iperf server
* @ingroup apps
*
* This is a simple performance measuring server to check your bandwith using
* iPerf2 on a PC as client.
* It is currently a minimal implementation providing an IPv4 TCP server only.
*
* @todo: implement UDP mode and IPv6
*/
/*
* Copyright (c) 2014 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
*/
#include "lwip/apps/lwiperf.h"
#include "lwip/tcp.h"
#include "lwip/sys.h"
#include <string.h>
/* Currently, only TCP-over-IPv4 is implemented (does iperf support IPv6 anyway?) */
#if LWIP_IPV4 && LWIP_TCP && LWIP_CALLBACK_API
/** Specify the idle timeout (in seconds) after that the test fails */
#ifndef LWIPERF_TCP_MAX_IDLE_SEC
#define LWIPERF_TCP_MAX_IDLE_SEC 10U
#endif
#if LWIPERF_TCP_MAX_IDLE_SEC > 255
#error LWIPERF_TCP_MAX_IDLE_SEC must fit into an u8_t
#endif
/* File internal memory allocation (struct lwiperf_*): this defaults to
the heap */
#ifndef LWIPERF_ALLOC
#define LWIPERF_ALLOC(type) mem_malloc(sizeof(type))
#define LWIPERF_FREE(type, item) mem_free(item)
#endif
/** If this is 1, check that received data has the correct format */
#ifndef LWIPERF_CHECK_RX_DATA
#define LWIPERF_CHECK_RX_DATA 0
#endif
/** This is the Iperf settings struct sent from the client */
typedef struct _lwiperf_settings {
#define LWIPERF_FLAGS_ANSWER_TEST 0x80000000
#define LWIPERF_FLAGS_ANSWER_NOW 0x00000001
u32_t flags;
u32_t num_threads; /* unused for now */
u32_t remote_port;
u32_t buffer_len; /* unused for now */
u32_t win_band; /* TCP window / UDP rate: unused for now */
u32_t amount; /* pos. value: bytes?; neg. values: time (unit is 10ms: 1/100 second) */
} lwiperf_settings_t;
/** Basic connection handle */
struct _lwiperf_state_base;
typedef struct _lwiperf_state_base lwiperf_state_base_t;
struct _lwiperf_state_base {
/* 1=tcp, 0=udp */
u8_t tcp;
/* 1=server, 0=client */
u8_t server;
lwiperf_state_base_t *next;
lwiperf_state_base_t *related_server_state;
};
/** Connection handle for a TCP iperf session */
typedef struct _lwiperf_state_tcp {
lwiperf_state_base_t base;
struct tcp_pcb *server_pcb;
struct tcp_pcb *conn_pcb;
u32_t time_started;
lwiperf_report_fn report_fn;
void *report_arg;
u8_t poll_count;
u8_t next_num;
u32_t bytes_transferred;
lwiperf_settings_t settings;
u8_t have_settings_buf;
} lwiperf_state_tcp_t;
/** List of active iperf sessions */
static lwiperf_state_base_t *lwiperf_all_connections;
/** A const buffer to send from: we want to measure sending, not copying! */
static const u8_t lwiperf_txbuf_const[1600] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '1', '2', '3', '4'B>, '5', '6', '7', '8', '9', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
};
static err_t lwiperf_tcp_poll(void *arg, struct tcp_pcb *tpcb);
static void lwiperf_tcp_err(void *arg, err_t err);
/** Add an iperf session to the 'active' list */
static void
lwiperf_list_add(lwiperf_state_base_t *item)
{
if (lwiperf_all_connections == NULL) {
lwiperf_all_connections = item;
} else {
item = lwiperf_all_connections;
}
}
/** Remove an iperf session from the 'active' list */
static void
lwiperf_list_remove(lwiperf_state_base_t *item)
{
lwiperf_state_base_t *prev = NULL;
lwiperf_state_base_t *iter;
for (iter = lwiperf_all_connections; iter != NULL; prev = iter, iter = iter->next) {
if (iter == item) {
if (prev == NULL) {
lwiperf_all_connections = iter->next;
} else {
prev->next = item;
}
/* @debug: ensure this item is listed only once */
for (iter = iter->next; iter != NULL; iter = iter->next) {
LWIP_ASSERT("duplicate entry", iter != item);
}
break;
}
}
}
/** Call the report function of an iperf tcp session */
static void
lwip_tcp_conn_report(lwiperf_state_tcp_t *conn, enum lwiperf_report_type report_type)
{
if ((conn != NULL) && (conn->report_fn != NULL)) {
u32_t now, duration_ms, bandwidth_kbitpsec;
now = sys_now();
duration_ms = now - conn->time_started;
if (duration_ms == 0) {
bandwidth_kbitpsec = 0;
} else {
bandwidth_kbitpsec = (conn->bytes_transferred / duration_ms) * 8U;
}
conn->report_fn(conn->report_arg, report_type,
&conn->conn_pcb->local_ip, conn->conn_pcb->local_port,
&conn->conn_pcb->remote_ip, conn->conn_pcb->remote_port,
conn->bytes_transferred, duration_ms, bandwidth_kbitpsec);
}
}
/** Close an iperf tcp session */
static void
lwiperf_tcp_close(lwiperf_state_tcp_t *conn, enum lwiperf_report_type report_type)
{
err_t err;
lwip_tcp_conn_report(conn, report_type);
lwiperf_list_remove(&conn->base);
if (conn->conn_pcb != NULL) {
tcp_arg(conn->conn_pcb, NULL);
tcp_poll(conn->conn_pcb, NULL, 0);
tcp_sent(conn->conn_pcb, NULL);
tcp_recv(conn->conn_pcb, NULL);
tcp_err(conn->conn_pcb, NULL);
err = tcp_close(conn->conn_pcb);
if (err != ERR_OK) {
/* don't want to wait for free memory here... */
tcp_abort(conn->conn_pcb);
}
} else {
/* no conn pcb, this is the server pcb */
err = tcp_close(conn->server_pcb);
LWIP_ASSERT("error", err != ERR_OK);
}
LWIPERF_FREE(lwiperf_state_tcp_t, conn);
}
/** Try to send more data on an iperf tcp session */
static err_t
lwiperf_tcp_client_send_more(lwiperf_state_tcp_t *conn)
{
int send_more;
err_t err;
u16_t txlen;
u16_t txlen_max;
void *txptr;
u8_t apiflags;
LWIP_ASSERT("conn invalid", (conn != NULL) && conn->base.tcp && (conn->base.server == 0));
do {
send_more = 0;
if (conn->settings.amount & PP_HTONL(0x80000000)) {
/* this session is time-limited */
u32_t now = sys_now();
u32_t diff_ms = now - conn->time_started;
u32_t time = (u32_t) - (s32_t)lwip_htonl(conn->settings.amount);
u32_t time_ms = time * 10;
if (diff_ms >= time_ms) {
/* time specified by the client is over -> close the connection */
lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_CLIENT);
return ERR_OK;
}
} else {
/* this session is byte-limited */
u32_t amount_bytes = lwip_htonl(conn->settings.amount);
/* @todo: this can send up to 1*MSS more than requested... */
if (amount_bytes >= conn->bytes_transferred) {
/* all requested bytes transferred -> close the connection */
lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_CLIENT);
return ERR_OK;
}
}
if (conn->bytes_transferred < 24) {
/* transmit the settings a first time */
txptr = &((u8_t *)&conn->settings)[conn->bytes_transferred];
txlen_max = (u16_t)(24 - conn->bytes_transferred);
apiflags = TCP_WRITE_FLAG_COPY;
} else if (conn->bytes_transferred < 48) {
/* transmit the settings a second time */
txptr = &((u8_t *)&conn->settings)[conn->bytes_transferred - 24];
txlen_max = (u16_t)(48 - conn->bytes_transferred);
apiflags = TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE;
send_more = 1;
} else {
/* transmit data */
/* @todo: every x bytes, transmit the settings again */
txptr = LWIP_CONST_CAST(void *, &lwiperf_txbuf_const[conn->bytes_transferred % 10]);
txlen_max = TCP_MSS;
if (conn->bytes_transferred == 48) { /* @todo: fix this for intermediate settings, too */
txlen_max = TCP_MSS - 24;
}
apiflags = 0; /* no copying needed */
send_more = 1;
}
txlen = txlen_max;
do {
err = tcp_write(conn->conn_pcb, txptr, txlen, apiflags);
if (err == ERR_MEM) {
txlen /= 2;
}
} while ((err == ERR_MEM) && (txlen >= (TCP_MSS / 2)));
if (err == ERR_OK) {
conn->bytes_transferred += txlen;
} else {
send_more = 0;
}
} while (send_more);
tcp_output(conn->conn_pcb);
return ERR_OK;
}
/** TCP sent callback, try to send more data */
static err_t
lwiperf_tcp_client_sent(void *arg, struct tcp_pcb *tpcb, u16_t len)
{
lwiperf_state_tcp_t *conn = (lwiperf_state_tcp_t *)arg;
/* @todo: check 'len' (e.g. to time ACK of all data)? for now, we just send more... */
LWIP_ASSERT("invalid conn", conn->conn_pcb == tpcb);
LWIP_UNUSED_ARG(tpcb);
LWIP_UNUSED_ARG(len);
conn->poll_count = 0;
return lwiperf_tcp_client_send_more(conn);
}
/** TCP connected callback (active connection), send data now */
static err_t
lwiperf_tcp_client_connected(void *arg, struct tcp_pcb *tpcb, err_t err)
{
lwiperf_state_tcp_t *conn = (lwiperf_state_tcp_t *)arg;
LWIP_ASSERT("invalid conn", conn->conn_pcb == tpcb);
LWIP_UNUSED_ARG(tpcb);
if (err != ERR_OK) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE);
return ERR_OK;
}
conn->poll_count = 0;
conn->time_started = sys_now();
return lwiperf_tcp_client_send_more(conn);
}
/** Start TCP connection back to the client (either parallel or after the
* receive test has finished.
*/
static err_t
lwiperf_tx_start(lwiperf_state_tcp_t *conn)
{
err_t err;
lwiperf_state_tcp_t *client_conn;
struct tcp_pcb *newpcb;
ip_addr_t remote_addr;
u16_t remote_port;
client_conn = (lwiperf_state_tcp_t *)LWIPERF_ALLOC(lwiperf_state_tcp_t);
if (client_conn == NULL) {
return ERR_MEM;
}
newpcb = tcp_new();
if (newpcb == NULL) {
LWIPERF_FREE(lwiperf_state_tcp_t, client_conn);
return ERR_MEM;
}
MEMCPY(client_conn, conn, sizeof(lwiperf_state_tcp_t));
client_conn->base.server = 0;
client_conn->server_pcb = NULL;
client_conn->conn_pcb = newpcb;
client_conn->time_started = sys_now(); /* @todo: set this again on 'connected' */
client_conn->poll_count = 0;
client_conn->next_num = 4; /* initial nr is '4' since the header has 24 byte */
client_conn->bytes_transferred = 0;
client_conn->settings.flags = 0; /* prevent the remote side starting back as client again */
tcp_arg(newpcb, client_conn);
tcp_sent(newpcb, lwiperf_tcp_client_sent);
tcp_poll(newpcb, lwiperf_tcp_poll, 2U);
tcp_err(newpcb, lwiperf_tcp_err);
ip_addr_copy(remote_addr, conn->conn_pcb->remote_ip);
remote_port = (u16_t)lwip_htonl(client_conn->settings.remote_port);
err = tcp_connect(newpcb, &remote_addr, remote_port, lwiperf_tcp_client_connected);
if (err != ERR_OK) {
lwiperf_tcp_close(client_conn, LWIPERF_TCP_ABORTED_LOCAL);
return err;
}
lwiperf_list_add(&client_conn->base);
return ERR_OK;
}
/** Receive data on an iperf tcp session */
static err_t
lwiperf_tcp_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
u8_t tmp;
u16_t tot_len;
u32_t packet_idx;
struct pbuf *q;
lwiperf_state_tcp_t *conn = (lwiperf_state_tcp_t *)arg;
LWIP_ASSERT("pcb mismatch", conn->conn_pcb == tpcb);
LWIP_UNUSED_ARG(tpcb);
if (err != ERR_OK) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE);
return ERR_OK;
}
if (p == NULL) {
/* connection closed -> test done */
if ((conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST | LWIPERF_FLAGS_ANSWER_NOW)) ==
PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST)) {
/* client requested transmission after end of test */
lwiperf_tx_start(conn);
}
lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_SERVER);
return ERR_OK;
}
tot_len = p->tot_len;
conn->poll_count = 0;
if ((!conn->have_settings_buf) || ((conn->bytes_transferred - 24) % (1024 * 128) == 0)) {
/* wait for 24-byte header */
if (p->tot_len < sizeof(lwiperf_settings_t)) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR);
pbuf_free(p);
return ERR_VAL;
}
if (!conn->have_settings_buf) {
if (pbuf_copy_partial(p, &conn->settings, sizeof(lwiperf_settings_t), 0) != sizeof(lwiperf_settings_t)) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL);
pbuf_free(p);
return ERR_VAL;
}
conn->have_settings_buf = 1;
if ((conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST | LWIPERF_FLAGS_ANSWER_NOW)) ==
PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST | LWIPERF_FLAGS_ANSWER_NOW)) {
/* client requested parallel transmission test */
err_t err2 = lwiperf_tx_start(conn);
if (err2 != ERR_OK) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_TXERROR);
pbuf_free(p);
return err2;
}
}
} else {
if (pbuf_memcmp(p, 0, &conn->settings, sizeof(lwiperf_settings_t)) != 0) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR);
pbuf_free(p);
return ERR_VAL;
}
}
conn->bytes_transferred += sizeof(lwiperf_settings_t);
if (conn->bytes_transferred <= 24) {
conn->time_started = sys_now();
tcp_recved(tpcb, p->tot_len);
pbuf_free(p);
return ERR_OK;
}
conn->next_num = 4; /* 24 bytes received... */
tmp = pbuf_remove_header(p, 24);
LWIP_ASSERT("pbuf_remove_header failed", tmp == 0);
}
packet_idx = 0;
for (q = p; q != NULL; q = q->next) {
#if LWIPERF_CHECK_RX_DATA
const u8_t *payload = (const u8_t *)q->payload;
u16_t i;
for (i = 0; i < q->len; i++) {
u8_t val = payload[i];
u8_t num = val - '0';
if (num == conn->next_num) {
conn->next_num++;
if (conn->next_num == 10) {
conn->next_num = 0;
}
} else {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR);
pbuf_free(p);
return ERR_VAL;
}
}
#endif
packet_idx += q->len;
}
LWIP_ASSERT("count mismatch", packet_idx == p->tot_len);
conn->bytes_transferred += packet_idx;
tcp_recved(tpcb, tot_len);
pbuf_free(p);
return ERR_OK;
}
/** Error callback, iperf tcp session aborted */
static void
lwiperf_tcp_err(void *arg, err_t err)
{
lwiperf_state_tcp_t *conn = (lwiperf_state_tcp_t *)arg;
LWIP_UNUSED_ARG(err);
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE);
}
/** TCP poll callback, try to send more data */
static err_t
lwiperf_tcp_poll(void *arg, struct tcp_pcb *tpcb)
{
lwiperf_state_tcp_t *conn = (lwiperf_state_tcp_t *)arg;
LWIP_ASSERT("pcb mismatch", conn->conn_pcb == tpcb);
LWIP_UNUSED_ARG(tpcb);
if (++conn->poll_count >= LWIPERF_TCP_MAX_IDLE_SEC) {
lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL);
return ERR_OK; /* lwiperf_tcp_close frees conn */
}
if (!conn->base.server) {
lwiperf_tcp_client_send_more(conn);
}
return ERR_OK;
}
/** This is called when a new client connects for an iperf tcp session */
static err_t
lwiperf_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err)
{
lwiperf_state_tcp_t *s, *conn;
if ((err != ERR_OK) || (newpcb == NULL) || (arg == NULL)) {
return ERR_VAL;
}
s = (lwiperf_state_tcp_t *)arg;
conn = (lwiperf_state_tcp_t *)LWIPERF_ALLOC(lwiperf_state_tcp_t);
if (conn == NULL) {
return ERR_MEM;
}
memset(conn, 0, sizeof(lwiperf_state_tcp_t));
conn->base.tcp = 1;
conn->base.server = 1;
conn->base.related_server_state = &s->base;
conn->server_pcb = s->server_pcb;
conn->conn_pcb = newpcb;
conn->time_started = sys_now();
conn->report_fn = s->report_fn;
conn->report_arg = s->report_arg;
/* setup the tcp rx connection */
tcp_arg(newpcb, conn);
tcp_recv(newpcb, lwiperf_tcp_recv);
tcp_poll(newpcb, lwiperf_tcp_poll, 2U);
tcp_err(conn->conn_pcb, lwiperf_tcp_err);
lwiperf_list_add(&conn->base);
return ERR_OK;
}
/**
* @ingroup iperf
* Start a TCP iperf server on the default TCP port (5001) and listen for
* incoming connections from iperf clients.
*
* @returns a connection handle that can be used to abort the server
* by calling @ref lwiperf_abort()
*/
void *
lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void *report_arg)
{
return lwiperf_start_tcp_server(IP_ADDR_ANY, LWIPERF_TCP_PORT_DEFAULT,
report_fn, report_arg);
}
/**
* @ingroup iperf
* Start a TCP iperf server on a specific IP address and port and listen for
* incoming connections from iperf clients.
*
* @returns a connection handle that can be used to abort the server
* by calling @ref lwiperf_abort()
*/
void *
lwiperf_start_tcp_server(const ip_addr_t *local_addr, u16_t local_port,
lwiperf_report_fn report_fn, void *report_arg)
{
err_t err;
struct tcp_pcb *pcb;
lwiperf_state_tcp_t *s;
if (local_addr == NULL) {
return NULL;
}
s = (lwiperf_state_tcp_t *)LWIPERF_ALLOC(lwiperf_state_tcp_t);
if (s == NULL) {
return NULL;
}
memset(s, 0, sizeof(lwiperf_state_tcp_t));
s->base.tcp = 1;
s->base.server = 1;
s->report_fn = report_fn;
s->report_arg = report_arg;
pcb = tcp_new();
if (pcb != NULL) {
err = tcp_bind(pcb, local_addr, local_port);
if (err == ERR_OK) {
s->server_pcb = tcp_listen_with_backlog(pcb, 1);
}
}
if (s->server_pcb == NULL) {
if (pcb != NULL) {
tcp_close(pcb);
}
LWIPERF_FREE(lwiperf_state_tcp_t, s);
return NULL;
}
pcb = NULL;
tcp_arg(s->server_pcb, s);
tcp_accept(s->server_pcb, lwiperf_tcp_accept);
lwiperf_list_add(&s->base);
return s;
}
/**
* @ingroup iperf
* Abort an iperf session (handle returned by lwiperf_start_tcp_server*())
*/
void
lwiperf_abort(void *lwiperf_session)
{
lwiperf_state_base_t *i, *dealloc, *last = NULL;
for (i = lwiperf_all_connections; i != NULL; ) {
if ((i == lwiperf_session) || (i->related_server_state == lwiperf_session)) {
dealloc = i;
i = i->next;
if (last != NULL) {
last->next = i;
}
LWIPERF_FREE(lwiperf_state_tcp_t, dealloc); /* @todo: type? */
} else {
last = i;
i = i->next;
}
}
}
#endif /* LWIP_IPV4 && LWIP_TCP && LWIP_CALLBACK_API */