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lwiperf.c
Время создания: 24.11.2018 13:57
Раздел: Electronics - Microcontrollers - LWIP

/**

* @file

* lwIP iPerf server implementation

*/


/**

* @defgroup iperf Iperf server

* @ingroup apps

*

* This is a simple performance measuring client/server to check your bandwith using

* iPerf2 on a PC as server/client.

* It is currently a minimal implementation providing a TCP client/server only.

*

* @todo:

* - implement UDP mode

* - protect combined sessions handling (via 'related_master_state') against reallocation

* (this is a pointer address, currently, so if the same memory is allocated again,

* session pairs (tx/rx) can be confused on reallocation)

*/


/*

* 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 is implemented */

#if 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


/** Change this if you don't want to lwiperf to listen to any IP version */

#ifndef LWIPERF_SERVER_IP_TYPE

#define LWIPERF_SERVER_IP_TYPE IPADDR_TYPE_ANY

#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 {

/* linked list */

lwiperf_state_base_t *next;

/* 1=tcp, 0=udp */

u8_t tcp;

/* 1=server, 0=client */

u8_t server;

/* master state used to abort sessions (e.g. listener, main client) */

lwiperf_state_base_t *related_master_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;

/* 1=start server when client is closed */

u8_t client_tradeoff_mode;

u32_t bytes_transferred;

lwiperf_settings_t settings;

u8_t have_settings_buf;

u8_t specific_remote;

ip_addr_t remote_addr;

} 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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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', '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);

static err_t lwiperf_start_tcp_server_impl(const ip_addr_t *local_addr, u16_t local_port,

lwiperf_report_fn report_fn, void *report_arg,

lwiperf_state_base_t *related_master_state, lwiperf_state_tcp_t **state);



/** Add an iperf session to the 'active' list */

static void

lwiperf_list_add(lwiperf_state_base_t *item)

{

item->next = lwiperf_all_connections;

lwiperf_all_connections = item;

}


/** 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 = iter->next;

}

/* @debug: ensure this item is listed only once */

for (iter = iter->next; iter != NULL; iter = iter->next) {

LWIP_ASSERT("duplicate entry", iter != item);

}

break;

}

}

}


static lwiperf_state_base_t *

lwiperf_list_find(lwiperf_state_base_t *item)

{

lwiperf_state_base_t *iter;

for (iter = lwiperf_all_connections; iter != NULL; iter = iter->next) {

if (iter == item) {

return item;

}

}

return NULL;

}


/** 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;


lwiperf_list_remove(&conn->base);

lwip_tcp_conn_report(conn, report_type);

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 listener 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_impl(const ip_addr_t *remote_ip, u16_t remote_port, lwiperf_settings_t *settings, lwiperf_report_fn report_fn,

void *report_arg, lwiperf_state_base_t *related_master_state, lwiperf_state_tcp_t **new_conn)

{

err_t err;

lwiperf_state_tcp_t *client_conn;

struct tcp_pcb *newpcb;

ip_addr_t remote_addr;


LWIP_ASSERT("remote_ip != NULL", remote_ip != NULL);

LWIP_ASSERT("remote_ip != NULL", settings != NULL);

LWIP_ASSERT("new_conn != NULL", new_conn != NULL);

*new_conn = NULL;


client_conn = (lwiperf_state_tcp_t *)LWIPERF_ALLOC(lwiperf_state_tcp_t);

if (client_conn == NULL) {

return ERR_MEM;

}

newpcb = tcp_new_ip_type(IP_GET_TYPE(remote_ip));

if (newpcb == NULL) {

LWIPERF_FREE(lwiperf_state_tcp_t, client_conn);

return ERR_MEM;

}

memset(client_conn, 0, sizeof(lwiperf_state_tcp_t));

client_conn->base.tcp = 1;

client_conn->base.related_master_state = related_master_state;

client_conn->conn_pcb = newpcb;

client_conn->time_started = sys_now(); /* @todo: set this again on 'connected' */

client_conn->report_fn = report_fn;

client_conn->report_arg = report_arg;

client_conn->next_num = 4; /* initial nr is '4' since the header has 24 byte */

client_conn->bytes_transferred = 0;

memcpy(&client_conn->settings, settings, sizeof(*settings));

client_conn->have_settings_buf = 1;


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, *remote_ip);


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);

*new_conn = client_conn;

return ERR_OK;

}


static err_t

lwiperf_tx_start_passive(lwiperf_state_tcp_t *conn)

{

err_t ret;

lwiperf_state_tcp_t *new_conn = NULL;

u16_t remote_port = (u16_t)lwip_htonl(conn->settings.remote_port);


ret = lwiperf_tx_start_impl(&conn->conn_pcb->remote_ip, remote_port, &conn->settings, conn->report_fn, conn->report_arg,

conn->base.related_master_state, &new_conn);

if (ret == ERR_OK) {

LWIP_ASSERT("new_conn != NULL", new_conn != NULL);

new_conn->settings.flags = 0; /* prevent the remote side starting back as client again */

}

return ret;

}


/** 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)) {

if ((conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_NOW)) == 0) {

/* client requested transmission after end of test */

lwiperf_tx_start_passive(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_OK;

}

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_OK;

}

conn->have_settings_buf = 1;

if (conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST)) {

if (conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_NOW)) {

/* client requested parallel transmission test */

err_t err2 = lwiperf_tx_start_passive(conn);

if (err2 != ERR_OK) {

lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_TXERROR);

pbuf_free(p);

return ERR_OK;

}

}

}

} else {

if (conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST)) {

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_OK;

}

}

}

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);

LWIP_UNUSED_ARG(tmp); /* for LWIP_NOASSERT */

}


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_OK;

}

}

#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;

LWIP_ASSERT("invalid session", s->base.server);

LWIP_ASSERT("invalid listen pcb", s->server_pcb != NULL);

LWIP_ASSERT("invalid conn pcb", s->conn_pcb == NULL);

if (s->specific_remote) {

LWIP_ASSERT("s->base.related_master_state != NULL", s->base.related_master_state != NULL);

if (!ip_addr_cmp(&newpcb->remote_ip, &s->remote_addr)) {

/* this listener belongs to a client session, and this is not the correct remote */

return ERR_VAL;

}

} else {

LWIP_ASSERT("s->base.related_master_state == NULL", s->base.related_master_state == NULL);

}


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_master_state = &s->base;

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);


if (s->specific_remote) {

/* this listener belongs to a client, so make the client the master of the newly created connection */

conn->base.related_master_state = s->base.related_master_state;

/* if dual mode or (tradeoff mode AND client is done): close the listener */

if (!s->client_tradeoff_mode || !lwiperf_list_find(s->base.related_master_state)) {

/* prevent report when closing: this is expected */

s->report_fn = NULL;

lwiperf_tcp_close(s, LWIPERF_TCP_ABORTED_LOCAL);

}

}

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;

lwiperf_state_tcp_t *state = NULL;


err = lwiperf_start_tcp_server_impl(local_addr, local_port, report_fn, report_arg,

NULL, &state);

if (err == ERR_OK) {

return state;

}

return NULL;

}


static err_t lwiperf_start_tcp_server_impl(const ip_addr_t *local_addr, u16_t local_port,

lwiperf_report_fn report_fn, void *report_arg,

lwiperf_state_base_t *related_master_state, lwiperf_state_tcp_t **state)

{

err_t err;

struct tcp_pcb *pcb;

lwiperf_state_tcp_t *s;


LWIP_ASSERT_CORE_LOCKED();


LWIP_ASSERT("state != NULL", state != NULL);


if (local_addr == NULL) {

return ERR_ARG;

}


s = (lwiperf_state_tcp_t *)LWIPERF_ALLOC(lwiperf_state_tcp_t);

if (s == NULL) {

return ERR_MEM;

}

memset(s, 0, sizeof(lwiperf_state_tcp_t));

s->base.tcp = 1;

s->base.server = 1;

s->base.related_master_state = related_master_state;

s->report_fn = report_fn;

s->report_arg = report_arg;


pcb = tcp_new_ip_type(LWIPERF_SERVER_IP_TYPE);

if (pcb == NULL) {

return ERR_MEM;

}

err = tcp_bind(pcb, local_addr, local_port);

if (err != ERR_OK) {

return err;

}

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 ERR_MEM;

}

pcb = NULL;


tcp_arg(s->server_pcb, s);

tcp_accept(s->server_pcb, lwiperf_tcp_accept);


lwiperf_list_add(&s->base);

*state = s;

return ERR_OK;

}


/**

* @ingroup iperf

* Start a TCP iperf client to the default TCP port (5001).

*

* @returns a connection handle that can be used to abort the client

* by calling @ref lwiperf_abort()

*/

void* lwiperf_start_tcp_client_default(const ip_addr_t* remote_addr,

lwiperf_report_fn report_fn, void* report_arg)

{

return lwiperf_start_tcp_client(remote_addr, LWIPERF_TCP_PORT_DEFAULT, LWIPERF_CLIENT,

report_fn, report_arg);

}


/**

* @ingroup iperf

* Start a TCP iperf client to a specific IP address and port.

*

* @returns a connection handle that can be used to abort the client

* by calling @ref lwiperf_abort()

*/

void* lwiperf_start_tcp_client(const ip_addr_t* remote_addr, u16_t remote_port,

enum lwiperf_client_type type, lwiperf_report_fn report_fn, void* report_arg)

{

err_t ret;

lwiperf_settings_t settings;

lwiperf_state_tcp_t *state = NULL;


memset(&settings, 0, sizeof(settings));

switch (type) {

case LWIPERF_CLIENT:

/* Unidirectional tx only test */

settings.flags = 0;

break;

case LWIPERF_DUAL:

/* Do a bidirectional test simultaneously */

settings.flags = htonl(LWIPERF_FLAGS_ANSWER_TEST | LWIPERF_FLAGS_ANSWER_NOW);

break;

case LWIPERF_TRADEOFF:

/* Do a bidirectional test individually */

settings.flags = htonl(LWIPERF_FLAGS_ANSWER_TEST);

break;

default:

/* invalid argument */

return NULL;

}

settings.num_threads = htonl(1);

settings.remote_port = htonl(LWIPERF_TCP_PORT_DEFAULT);

/* TODO: implement passing duration/amount of bytes to transfer */

settings.amount = htonl((u32_t)-1000);


ret = lwiperf_tx_start_impl(remote_addr, remote_port, &settings, report_fn, report_arg, NULL, &state);

if (ret == ERR_OK) {

LWIP_ASSERT("state != NULL", state != NULL);

if (type != LWIPERF_CLIENT) {

/* start corresponding server now */

lwiperf_state_tcp_t *server = NULL;

ret = lwiperf_start_tcp_server_impl(&state->conn_pcb->local_ip, LWIPERF_TCP_PORT_DEFAULT,

report_fn, report_arg, (lwiperf_state_base_t *)state, &server);

if (ret != ERR_OK) {

/* starting server failed, abort client */

lwiperf_abort(state);

return NULL;

}

/* make this server accept one connection only */

server->specific_remote = 1;

server->remote_addr = state->conn_pcb->remote_ip;

if (type == LWIPERF_TRADEOFF) {

/* tradeoff means that the remote host connects only after the client is done,

so keep the listen pcb open until the client is done */

server->client_tradeoff_mode = 1;

}

}

return state;

}

return NULL;

}


/**

* @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;


LWIP_ASSERT_CORE_LOCKED();


for (i = lwiperf_all_connections; i != NULL; ) {

if ((i == lwiperf_session) || (i->related_master_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_TCP && LWIP_CALLBACK_API */


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