| /** |
| * @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 |
| |
| /** 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] = { |
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| }; |
| |
| 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_header(p, -24); |
| LWIP_ASSERT("pbuf_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 */ |