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lwip_lwiperf.c
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00001 /** 00002 * @file 00003 * lwIP iPerf server implementation 00004 */ 00005 00006 /** 00007 * @defgroup iperf Iperf server 00008 * @ingroup apps 00009 * 00010 * This is a simple performance measuring server to check your bandwith using 00011 * iPerf2 on a PC as client. 00012 * It is currently a minimal implementation providing an IPv4 TCP server only. 00013 * 00014 * @todo: implement UDP mode and IPv6 00015 */ 00016 00017 /* 00018 * Copyright (c) 2014 Simon Goldschmidt 00019 * All rights reserved. 00020 * 00021 * Redistribution and use in source and binary forms, with or without modification, 00022 * are permitted provided that the following conditions are met: 00023 * 00024 * 1. Redistributions of source code must retain the above copyright notice, 00025 * this list of conditions and the following disclaimer. 00026 * 2. Redistributions in binary form must reproduce the above copyright notice, 00027 * this list of conditions and the following disclaimer in the documentation 00028 * and/or other materials provided with the distribution. 00029 * 3. The name of the author may not be used to endorse or promote products 00030 * derived from this software without specific prior written permission. 00031 * 00032 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00033 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00034 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00035 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00036 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00037 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00038 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00039 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00040 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00041 * OF SUCH DAMAGE. 00042 * 00043 * This file is part of the lwIP TCP/IP stack. 00044 * 00045 * Author: Simon Goldschmidt 00046 */ 00047 00048 #include "lwip/apps/lwiperf.h" 00049 00050 #include "lwip/tcp.h" 00051 #include "lwip/sys.h" 00052 00053 #include <string.h> 00054 00055 /* Currently, only TCP-over-IPv4 is implemented (does iperf support IPv6 anyway?) */ 00056 #if LWIP_IPV4 && LWIP_TCP && LWIP_CALLBACK_API 00057 00058 /** Specify the idle timeout (in seconds) after that the test fails */ 00059 #ifndef LWIPERF_TCP_MAX_IDLE_SEC 00060 #define LWIPERF_TCP_MAX_IDLE_SEC 10U 00061 #endif 00062 #if LWIPERF_TCP_MAX_IDLE_SEC > 255 00063 #error LWIPERF_TCP_MAX_IDLE_SEC must fit into an u8_t 00064 #endif 00065 00066 /* File internal memory allocation (struct lwiperf_*): this defaults to 00067 the heap */ 00068 #ifndef LWIPERF_ALLOC 00069 #define LWIPERF_ALLOC(type) mem_malloc(sizeof(type)) 00070 #define LWIPERF_FREE(type, item) mem_free(item) 00071 #endif 00072 00073 /** If this is 1, check that received data has the correct format */ 00074 #ifndef LWIPERF_CHECK_RX_DATA 00075 #define LWIPERF_CHECK_RX_DATA 0 00076 #endif 00077 00078 /** This is the Iperf settings struct sent from the client */ 00079 typedef struct _lwiperf_settings { 00080 #define LWIPERF_FLAGS_ANSWER_TEST 0x80000000 00081 #define LWIPERF_FLAGS_ANSWER_NOW 0x00000001 00082 u32_t flags; 00083 u32_t num_threads; /* unused for now */ 00084 u32_t remote_port; 00085 u32_t buffer_len; /* unused for now */ 00086 u32_t win_band; /* TCP window / UDP rate: unused for now */ 00087 u32_t amount; /* pos. value: bytes?; neg. values: time (unit is 10ms: 1/100 second) */ 00088 } lwiperf_settings_t; 00089 00090 /** Basic connection handle */ 00091 struct _lwiperf_state_base; 00092 typedef struct _lwiperf_state_base lwiperf_state_base_t; 00093 struct _lwiperf_state_base { 00094 /* 1=tcp, 0=udp */ 00095 u8_t tcp; 00096 /* 1=server, 0=client */ 00097 u8_t server; 00098 lwiperf_state_base_t* next; 00099 lwiperf_state_base_t* related_server_state; 00100 }; 00101 00102 /** Connection handle for a TCP iperf session */ 00103 typedef struct _lwiperf_state_tcp { 00104 lwiperf_state_base_t base; 00105 struct tcp_pcb* server_pcb; 00106 struct tcp_pcb* conn_pcb; 00107 u32_t time_started; 00108 lwiperf_report_fn report_fn; 00109 void* report_arg; 00110 u8_t poll_count; 00111 u8_t next_num; 00112 u32_t bytes_transferred; 00113 lwiperf_settings_t settings; 00114 u8_t have_settings_buf; 00115 } lwiperf_state_tcp_t; 00116 00117 /** List of active iperf sessions */ 00118 static lwiperf_state_base_t* lwiperf_all_connections; 00119 /** A const buffer to send from: we want to measure sending, not copying! */ 00120 static const u8_t lwiperf_txbuf_const[1600] = { 00121 '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', 00122 '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', 00123 '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', 00124 '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', 00125 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00153 '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', 00154 '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', 00155 '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', 00156 '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', 00157 '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', 00158 '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', 00159 '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', 00160 '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', 00161 }; 00162 00163 static err_t lwiperf_tcp_poll(void *arg, struct tcp_pcb *tpcb); 00164 static void lwiperf_tcp_err(void *arg, err_t err); 00165 00166 /** Add an iperf session to the 'active' list */ 00167 static void 00168 lwiperf_list_add(lwiperf_state_base_t* item) 00169 { 00170 if (lwiperf_all_connections == NULL) { 00171 lwiperf_all_connections = item; 00172 } else { 00173 item = lwiperf_all_connections; 00174 } 00175 } 00176 00177 /** Remove an iperf session from the 'active' list */ 00178 static void 00179 lwiperf_list_remove(lwiperf_state_base_t* item) 00180 { 00181 lwiperf_state_base_t* prev = NULL; 00182 lwiperf_state_base_t* iter; 00183 for (iter = lwiperf_all_connections; iter != NULL; prev = iter, iter = iter->next) { 00184 if (iter == item) { 00185 if (prev == NULL) { 00186 lwiperf_all_connections = iter->next; 00187 } else { 00188 prev->next = item; 00189 } 00190 /* @debug: ensure this item is listed only once */ 00191 for (iter = iter->next; iter != NULL; iter = iter->next) { 00192 LWIP_ASSERT("duplicate entry", iter != item); 00193 } 00194 break; 00195 } 00196 } 00197 } 00198 00199 /** Call the report function of an iperf tcp session */ 00200 static void 00201 lwip_tcp_conn_report(lwiperf_state_tcp_t* conn, enum lwiperf_report_type report_type) 00202 { 00203 if ((conn != NULL) && (conn->report_fn != NULL)) { 00204 u32_t now, duration_ms, bandwidth_kbitpsec; 00205 now = sys_now(); 00206 duration_ms = now - conn->time_started; 00207 if (duration_ms == 0) { 00208 bandwidth_kbitpsec = 0; 00209 } else { 00210 bandwidth_kbitpsec = (conn->bytes_transferred / duration_ms) * 8U; 00211 } 00212 conn->report_fn(conn->report_arg, report_type, 00213 &conn->conn_pcb->local_ip, conn->conn_pcb->local_port, 00214 &conn->conn_pcb->remote_ip, conn->conn_pcb->remote_port, 00215 conn->bytes_transferred, duration_ms, bandwidth_kbitpsec); 00216 } 00217 } 00218 00219 /** Close an iperf tcp session */ 00220 static void 00221 lwiperf_tcp_close(lwiperf_state_tcp_t* conn, enum lwiperf_report_type report_type) 00222 { 00223 err_t err; 00224 00225 lwip_tcp_conn_report(conn, report_type); 00226 lwiperf_list_remove(&conn->base); 00227 if (conn->conn_pcb != NULL) { 00228 tcp_arg(conn->conn_pcb, NULL); 00229 tcp_poll(conn->conn_pcb, NULL, 0); 00230 tcp_sent(conn->conn_pcb, NULL); 00231 tcp_recv(conn->conn_pcb, NULL); 00232 tcp_err(conn->conn_pcb, NULL); 00233 err = tcp_close(conn->conn_pcb); 00234 if (err != ERR_OK) { 00235 /* don't want to wait for free memory here... */ 00236 tcp_abort(conn->conn_pcb); 00237 } 00238 } else { 00239 /* no conn pcb, this is the server pcb */ 00240 err = tcp_close(conn->server_pcb); 00241 LWIP_ASSERT("error", err != ERR_OK); 00242 } 00243 LWIPERF_FREE(lwiperf_state_tcp_t, conn); 00244 } 00245 00246 /** Try to send more data on an iperf tcp session */ 00247 static err_t 00248 lwiperf_tcp_client_send_more(lwiperf_state_tcp_t* conn) 00249 { 00250 int send_more; 00251 err_t err; 00252 u16_t txlen; 00253 u16_t txlen_max; 00254 void* txptr; 00255 u8_t apiflags; 00256 00257 LWIP_ASSERT("conn invalid", (conn != NULL) && conn->base.tcp && (conn->base.server == 0)); 00258 00259 do { 00260 send_more = 0; 00261 if (conn->settings.amount & PP_HTONL(0x80000000)) { 00262 /* this session is time-limited */ 00263 u32_t now = sys_now(); 00264 u32_t diff_ms = now - conn->time_started; 00265 u32_t time = (u32_t)-(s32_t)lwip_htonl(conn->settings.amount); 00266 u32_t time_ms = time * 10; 00267 if (diff_ms >= time_ms) { 00268 /* time specified by the client is over -> close the connection */ 00269 lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_CLIENT); 00270 return ERR_OK; 00271 } 00272 } else { 00273 /* this session is byte-limited */ 00274 u32_t amount_bytes = lwip_htonl(conn->settings.amount); 00275 /* @todo: this can send up to 1*MSS more than requested... */ 00276 if (amount_bytes >= conn->bytes_transferred) { 00277 /* all requested bytes transferred -> close the connection */ 00278 lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_CLIENT); 00279 return ERR_OK; 00280 } 00281 } 00282 00283 if (conn->bytes_transferred < 24) { 00284 /* transmit the settings a first time */ 00285 txptr = &((u8_t*)&conn->settings)[conn->bytes_transferred]; 00286 txlen_max = (u16_t)(24 - conn->bytes_transferred); 00287 apiflags = TCP_WRITE_FLAG_COPY; 00288 } else if (conn->bytes_transferred < 48) { 00289 /* transmit the settings a second time */ 00290 txptr = &((u8_t*)&conn->settings)[conn->bytes_transferred - 24]; 00291 txlen_max = (u16_t)(48 - conn->bytes_transferred); 00292 apiflags = TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE; 00293 send_more = 1; 00294 } else { 00295 /* transmit data */ 00296 /* @todo: every x bytes, transmit the settings again */ 00297 txptr = LWIP_CONST_CAST(void*, &lwiperf_txbuf_const[conn->bytes_transferred % 10]); 00298 txlen_max = TCP_MSS; 00299 if (conn->bytes_transferred == 48) { /* @todo: fix this for intermediate settings, too */ 00300 txlen_max = TCP_MSS - 24; 00301 } 00302 apiflags = 0; /* no copying needed */ 00303 send_more = 1; 00304 } 00305 txlen = txlen_max; 00306 do { 00307 err = tcp_write(conn->conn_pcb, txptr, txlen, apiflags); 00308 if (err == ERR_MEM) { 00309 txlen /= 2; 00310 } 00311 } while ((err == ERR_MEM) && (txlen >= (TCP_MSS/2))); 00312 00313 if (err == ERR_OK) { 00314 conn->bytes_transferred += txlen; 00315 } else { 00316 send_more = 0; 00317 } 00318 } while(send_more); 00319 00320 tcp_output(conn->conn_pcb); 00321 return ERR_OK; 00322 } 00323 00324 /** TCP sent callback, try to send more data */ 00325 static err_t 00326 lwiperf_tcp_client_sent(void *arg, struct tcp_pcb *tpcb, u16_t len) 00327 { 00328 lwiperf_state_tcp_t* conn = (lwiperf_state_tcp_t*)arg; 00329 /* @todo: check 'len' (e.g. to time ACK of all data)? for now, we just send more... */ 00330 LWIP_ASSERT("invalid conn", conn->conn_pcb == tpcb); 00331 LWIP_UNUSED_ARG(tpcb); 00332 LWIP_UNUSED_ARG(len); 00333 00334 conn->poll_count = 0; 00335 00336 return lwiperf_tcp_client_send_more(conn); 00337 } 00338 00339 /** TCP connected callback (active connection), send data now */ 00340 static err_t 00341 lwiperf_tcp_client_connected(void *arg, struct tcp_pcb *tpcb, err_t err) 00342 { 00343 lwiperf_state_tcp_t* conn = (lwiperf_state_tcp_t*)arg; 00344 LWIP_ASSERT("invalid conn", conn->conn_pcb == tpcb); 00345 LWIP_UNUSED_ARG(tpcb); 00346 if (err != ERR_OK) { 00347 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE); 00348 return ERR_OK; 00349 } 00350 conn->poll_count = 0; 00351 conn->time_started = sys_now(); 00352 return lwiperf_tcp_client_send_more(conn); 00353 } 00354 00355 /** Start TCP connection back to the client (either parallel or after the 00356 * receive test has finished. 00357 */ 00358 static err_t 00359 lwiperf_tx_start(lwiperf_state_tcp_t* conn) 00360 { 00361 err_t err; 00362 lwiperf_state_tcp_t* client_conn; 00363 struct tcp_pcb* newpcb; 00364 ip_addr_t remote_addr; 00365 u16_t remote_port; 00366 00367 client_conn = (lwiperf_state_tcp_t*)LWIPERF_ALLOC(lwiperf_state_tcp_t); 00368 if (client_conn == NULL) { 00369 return ERR_MEM; 00370 } 00371 newpcb = tcp_new(); 00372 if (newpcb == NULL) { 00373 LWIPERF_FREE(lwiperf_state_tcp_t, client_conn); 00374 return ERR_MEM; 00375 } 00376 00377 MEMCPY(client_conn, conn, sizeof(lwiperf_state_tcp_t)); 00378 client_conn->base.server = 0; 00379 client_conn->server_pcb = NULL; 00380 client_conn->conn_pcb = newpcb; 00381 client_conn->time_started = sys_now(); /* @todo: set this again on 'connected' */ 00382 client_conn->poll_count = 0; 00383 client_conn->next_num = 4; /* initial nr is '4' since the header has 24 byte */ 00384 client_conn->bytes_transferred = 0; 00385 client_conn->settings.flags = 0; /* prevent the remote side starting back as client again */ 00386 00387 tcp_arg(newpcb, client_conn); 00388 tcp_sent(newpcb, lwiperf_tcp_client_sent); 00389 tcp_poll(newpcb, lwiperf_tcp_poll, 2U); 00390 tcp_err(newpcb, lwiperf_tcp_err); 00391 00392 ip_addr_copy(remote_addr, conn->conn_pcb->remote_ip); 00393 remote_port = (u16_t)lwip_htonl(client_conn->settings.remote_port); 00394 00395 err = tcp_connect(newpcb, &remote_addr, remote_port, lwiperf_tcp_client_connected); 00396 if (err != ERR_OK) { 00397 lwiperf_tcp_close(client_conn, LWIPERF_TCP_ABORTED_LOCAL); 00398 return err; 00399 } 00400 lwiperf_list_add(&client_conn->base); 00401 return ERR_OK; 00402 } 00403 00404 /** Receive data on an iperf tcp session */ 00405 static err_t 00406 lwiperf_tcp_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err) 00407 { 00408 u8_t tmp; 00409 u16_t tot_len; 00410 u32_t packet_idx; 00411 struct pbuf* q; 00412 lwiperf_state_tcp_t* conn = (lwiperf_state_tcp_t*)arg; 00413 00414 LWIP_ASSERT("pcb mismatch", conn->conn_pcb == tpcb); 00415 LWIP_UNUSED_ARG(tpcb); 00416 00417 if (err != ERR_OK) { 00418 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE); 00419 return ERR_OK; 00420 } 00421 if (p == NULL) { 00422 /* connection closed -> test done */ 00423 if ((conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST|LWIPERF_FLAGS_ANSWER_NOW)) == 00424 PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST)) { 00425 /* client requested transmission after end of test */ 00426 lwiperf_tx_start(conn); 00427 } 00428 lwiperf_tcp_close(conn, LWIPERF_TCP_DONE_SERVER); 00429 return ERR_OK; 00430 } 00431 tot_len = p->tot_len; 00432 00433 conn->poll_count = 0; 00434 00435 if ((!conn->have_settings_buf) || ((conn->bytes_transferred -24) % (1024*128) == 0)) { 00436 /* wait for 24-byte header */ 00437 if (p->tot_len < sizeof(lwiperf_settings_t)) { 00438 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR); 00439 pbuf_free(p); 00440 return ERR_VAL; 00441 } 00442 if (!conn->have_settings_buf) { 00443 if (pbuf_copy_partial(p, &conn->settings, sizeof(lwiperf_settings_t), 0) != sizeof(lwiperf_settings_t)) { 00444 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL); 00445 pbuf_free(p); 00446 return ERR_VAL; 00447 } 00448 conn->have_settings_buf = 1; 00449 if ((conn->settings.flags & PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST|LWIPERF_FLAGS_ANSWER_NOW)) == 00450 PP_HTONL(LWIPERF_FLAGS_ANSWER_TEST|LWIPERF_FLAGS_ANSWER_NOW)) { 00451 /* client requested parallel transmission test */ 00452 err_t err2 = lwiperf_tx_start(conn); 00453 if (err2 != ERR_OK) { 00454 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_TXERROR); 00455 pbuf_free(p); 00456 return err2; 00457 } 00458 } 00459 } else { 00460 if (pbuf_memcmp(p, 0, &conn->settings, sizeof(lwiperf_settings_t)) != 0) { 00461 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR); 00462 pbuf_free(p); 00463 return ERR_VAL; 00464 } 00465 } 00466 conn->bytes_transferred += sizeof(lwiperf_settings_t); 00467 if (conn->bytes_transferred <= 24) { 00468 conn->time_started = sys_now(); 00469 tcp_recved(tpcb, p->tot_len); 00470 pbuf_free(p); 00471 return ERR_OK; 00472 } 00473 conn->next_num = 4; /* 24 bytes received... */ 00474 tmp = pbuf_header(p, -24); 00475 LWIP_ASSERT("pbuf_header failed", tmp == 0); 00476 } 00477 00478 packet_idx = 0; 00479 for (q = p; q != NULL; q = q->next) { 00480 #if LWIPERF_CHECK_RX_DATA 00481 const u8_t* payload = (const u8_t*)q->payload; 00482 u16_t i; 00483 for (i = 0; i < q->len; i++) { 00484 u8_t val = payload[i]; 00485 u8_t num = val - '0'; 00486 if (num == conn->next_num) { 00487 conn->next_num++; 00488 if (conn->next_num == 10) { 00489 conn->next_num = 0; 00490 } 00491 } else { 00492 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL_DATAERROR); 00493 pbuf_free(p); 00494 return ERR_VAL; 00495 } 00496 } 00497 #endif 00498 packet_idx += q->len; 00499 } 00500 LWIP_ASSERT("count mismatch", packet_idx == p->tot_len); 00501 conn->bytes_transferred += packet_idx; 00502 tcp_recved(tpcb, tot_len); 00503 pbuf_free(p); 00504 return ERR_OK; 00505 } 00506 00507 /** Error callback, iperf tcp session aborted */ 00508 static void 00509 lwiperf_tcp_err(void *arg, err_t err) 00510 { 00511 lwiperf_state_tcp_t* conn = (lwiperf_state_tcp_t*)arg; 00512 LWIP_UNUSED_ARG(err); 00513 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_REMOTE); 00514 } 00515 00516 /** TCP poll callback, try to send more data */ 00517 static err_t 00518 lwiperf_tcp_poll(void *arg, struct tcp_pcb *tpcb) 00519 { 00520 lwiperf_state_tcp_t* conn = (lwiperf_state_tcp_t*)arg; 00521 LWIP_ASSERT("pcb mismatch", conn->conn_pcb == tpcb); 00522 LWIP_UNUSED_ARG(tpcb); 00523 if (++conn->poll_count >= LWIPERF_TCP_MAX_IDLE_SEC) { 00524 lwiperf_tcp_close(conn, LWIPERF_TCP_ABORTED_LOCAL); 00525 return ERR_OK; /* lwiperf_tcp_close frees conn */ 00526 } 00527 00528 if (!conn->base.server) { 00529 lwiperf_tcp_client_send_more(conn); 00530 } 00531 00532 return ERR_OK; 00533 } 00534 00535 /** This is called when a new client connects for an iperf tcp session */ 00536 static err_t 00537 lwiperf_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err) 00538 { 00539 lwiperf_state_tcp_t *s, *conn; 00540 if ((err != ERR_OK) || (newpcb == NULL) || (arg == NULL)) { 00541 return ERR_VAL; 00542 } 00543 00544 s = (lwiperf_state_tcp_t*)arg; 00545 conn = (lwiperf_state_tcp_t*)LWIPERF_ALLOC(lwiperf_state_tcp_t); 00546 if (conn == NULL) { 00547 return ERR_MEM; 00548 } 00549 memset(conn, 0, sizeof(lwiperf_state_tcp_t)); 00550 conn->base.tcp = 1; 00551 conn->base.server = 1; 00552 conn->base.related_server_state = &s->base; 00553 conn->server_pcb = s->server_pcb; 00554 conn->conn_pcb = newpcb; 00555 conn->time_started = sys_now(); 00556 conn->report_fn = s->report_fn; 00557 conn->report_arg = s->report_arg; 00558 00559 /* setup the tcp rx connection */ 00560 tcp_arg(newpcb, conn); 00561 tcp_recv(newpcb, lwiperf_tcp_recv); 00562 tcp_poll(newpcb, lwiperf_tcp_poll, 2U); 00563 tcp_err(conn->conn_pcb, lwiperf_tcp_err); 00564 00565 lwiperf_list_add(&conn->base); 00566 return ERR_OK; 00567 } 00568 00569 /** 00570 * @ingroup iperf 00571 * Start a TCP iperf server on the default TCP port (5001) and listen for 00572 * incoming connections from iperf clients. 00573 * 00574 * @returns a connection handle that can be used to abort the server 00575 * by calling @ref lwiperf_abort() 00576 */ 00577 void* 00578 lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void* report_arg) 00579 { 00580 return lwiperf_start_tcp_server(IP_ADDR_ANY, LWIPERF_TCP_PORT_DEFAULT, 00581 report_fn, report_arg); 00582 } 00583 00584 /** 00585 * @ingroup iperf 00586 * Start a TCP iperf server on a specific IP address and port and listen for 00587 * incoming connections from iperf clients. 00588 * 00589 * @returns a connection handle that can be used to abort the server 00590 * by calling @ref lwiperf_abort() 00591 */ 00592 void* 00593 lwiperf_start_tcp_server(const ip_addr_t* local_addr, u16_t local_port, 00594 lwiperf_report_fn report_fn, void* report_arg) 00595 { 00596 err_t err; 00597 struct tcp_pcb* pcb; 00598 lwiperf_state_tcp_t* s; 00599 00600 if (local_addr == NULL) { 00601 return NULL; 00602 } 00603 00604 s = (lwiperf_state_tcp_t*)LWIPERF_ALLOC(lwiperf_state_tcp_t); 00605 if (s == NULL) { 00606 return NULL; 00607 } 00608 memset(s, 0, sizeof(lwiperf_state_tcp_t)); 00609 s->base.tcp = 1; 00610 s->base.server = 1; 00611 s->report_fn = report_fn; 00612 s->report_arg = report_arg; 00613 00614 pcb = tcp_new(); 00615 if (pcb != NULL) { 00616 err = tcp_bind(pcb, local_addr, local_port); 00617 if (err == ERR_OK) { 00618 s->server_pcb = tcp_listen_with_backlog(pcb, 1); 00619 } 00620 } 00621 if (s->server_pcb == NULL) { 00622 if (pcb != NULL) { 00623 tcp_close(pcb); 00624 } 00625 LWIPERF_FREE(lwiperf_state_tcp_t, s); 00626 return NULL; 00627 } 00628 pcb = NULL; 00629 00630 tcp_arg(s->server_pcb, s); 00631 tcp_accept(s->server_pcb, lwiperf_tcp_accept); 00632 00633 lwiperf_list_add(&s->base); 00634 return s; 00635 } 00636 00637 /** 00638 * @ingroup iperf 00639 * Abort an iperf session (handle returned by lwiperf_start_tcp_server*()) 00640 */ 00641 void 00642 lwiperf_abort(void* lwiperf_session) 00643 { 00644 lwiperf_state_base_t* i, *dealloc, *last = NULL; 00645 00646 for (i = lwiperf_all_connections; i != NULL; ) { 00647 if ((i == lwiperf_session) || (i->related_server_state == lwiperf_session)) { 00648 dealloc = i; 00649 i = i->next; 00650 if (last != NULL) { 00651 last->next = i; 00652 } 00653 LWIPERF_FREE(lwiperf_state_tcp_t, dealloc); /* @todo: type? */ 00654 } else { 00655 last = i; 00656 i = i->next; 00657 } 00658 } 00659 } 00660 00661 #endif /* LWIP_IPV4 && LWIP_TCP && LWIP_CALLBACK_API */
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