Browse Source

gnrc_tcp : initial implementation

pr/spi.typo
Simon Brummer 7 years ago
parent
commit
abd307b89d
  1. 6
      Makefile.dep
  2. 43
      examples/gnrc_tcp_cli/Makefile
  3. 222
      examples/gnrc_tcp_cli/main.c
  4. 42
      examples/gnrc_tcp_srv/Makefile
  5. 203
      examples/gnrc_tcp_srv/main.c
  6. 8
      sys/auto_init/auto_init.c
  7. 231
      sys/include/net/gnrc/tcp.h
  8. 182
      sys/include/net/gnrc/tcp/config.h
  9. 68
      sys/include/net/gnrc/tcp/fsm.h
  10. 56
      sys/include/net/gnrc/tcp/hdr.h
  11. 86
      sys/include/net/gnrc/tcp/tcb.h
  12. 3
      sys/net/gnrc/Makefile
  13. 1
      sys/net/gnrc/netreg/gnrc_netreg.c
  14. 3
      sys/net/gnrc/transport_layer/tcp/Makefile
  15. 616
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp.c
  16. 275
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp_eventloop.c
  17. 934
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp_fsm.c
  18. 90
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp_option.c
  19. 439
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp_pkt.c
  20. 83
      sys/net/gnrc/transport_layer/tcp/gnrc_tcp_rcvbuf.c
  21. 48
      sys/net/gnrc/transport_layer/tcp/internal/eventloop.h
  22. 61
      sys/net/gnrc/transport_layer/tcp/internal/fsm.h
  23. 79
      sys/net/gnrc/transport_layer/tcp/internal/helper.h
  24. 112
      sys/net/gnrc/transport_layer/tcp/internal/option.h
  25. 150
      sys/net/gnrc/transport_layer/tcp/internal/pkt.h
  26. 81
      sys/net/gnrc/transport_layer/tcp/internal/rcvbuf.h

6
Makefile.dep

@ -335,6 +335,12 @@ ifneq (,$(filter gnrc_udp,$(USEMODULE)))
USEMODULE += udp
endif
ifneq (,$(filter gnrc_tcp,$(USEMODULE)))
USEMODULE += inet_csum
USEMODULE += random
USEMODULE += xtimer
endif
ifneq (,$(filter gnrc_nettest,$(USEMODULE)))
USEMODULE += gnrc_netapi
USEMODULE += gnrc_netreg

43
examples/gnrc_tcp_cli/Makefile

@ -0,0 +1,43 @@
# name of your application
APPLICATION = gnrc_tcp_cli
# If no BOARD is found in the environment, use this default:
BOARD ?= native
PORT ?= tap1
TCP_TARGET_ADDR ?= fe80::5c38:e9ff:fe76:6195
TCP_TARGET_PORT ?= 80
TCP_TEST_CYCLES ?= 10
# Mark Boards with insufficient memory
BOARD_INSUFFICIENT_MEMORY := airfy-beacon arduino-duemilanove arduino-mega2560\
arduino-uno calliope-mini chronos microbit sb-430\
sb-430h nrf51dongle nrf6310 nucleo-f030 nucleo-f042\
nucleo32-f042 nucleo-f070 nucleo-f072 nucleo32-f303\
nucleo-f334 pca10000 pca10005 stm32f0discovery\
telosb weio wsn430-v1_3b wsn430-v1_4\
yunjia-nrf51822 z1 msb-430 msb-430h
# This has to be the absolute path to the RIOT base directory:
RIOTBASE ?= $(CURDIR)/../..
# Target Address, Target Port and number of Test Cycles
CFLAGS += -DTARGET_ADDR=\"$(TCP_TARGET_ADDR)\"
CFLAGS += -DTARGET_PORT=$(TCP_TARGET_PORT)
CFLAGS += -DCYCLES=$(TCP_TEST_CYCLES)
# Comment this out to disable code in RIOT that does safety checking
# which is not needed in a production environment but helps in the
# development process:
#CFLAGS += -DDEVELHELP
# Change this to 0 show compiler invocation lines by default:
QUIET ?= 1
# Modules to include
USEMODULE += gnrc_netdev_default
USEMODULE += auto_init_gnrc_netif
USEMODULE += gnrc_ipv6_default
USEMODULE += gnrc_tcp
include $(RIOTBASE)/Makefile.include

222
examples/gnrc_tcp_cli/main.c

@ -0,0 +1,222 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <stdio.h>
#include <errno.h>
#include "net/af.h"
#include "random.h"
#include "net/gnrc/ipv6.h"
#include "net/gnrc/tcp.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
/* Number of possible parallel connections */
#ifndef CONNS
#define CONNS 1
#endif
/* Amount of data to transmit */
#ifndef NBYTE
#define NBYTE (2048)
#endif
/* Test Pattern used by Client Application */
#ifndef TEST_PATERN_CLI
#define TEST_PATERN_CLI (0xF0)
#endif
/* Test Pattern used by Server Application */
#ifndef TEST_PATERN_SRV
#define TEST_PATERN_SRV (0xA7)
#endif
uint8_t bufs[CONNS][NBYTE];
uint8_t stacks[CONNS][THREAD_STACKSIZE_DEFAULT + THREAD_EXTRA_STACKSIZE_PRINTF];
void *cli_thread(void *arg);
int main(void)
{
printf("\nStarting Client Threads. TARGET_ADDR=%s, TARGET_PORT=%d, ", TARGET_ADDR, TARGET_PORT);
printf("CONNS=%d, NBYTE=%d, CYCLES=%d\n\n", CONNS, NBYTE, CYCLES );
/* Start Connection Handling Threads */
for (int i = 0; i < CONNS; i += 1) {
thread_create((char *)stacks[i], sizeof(stacks[i]), THREAD_PRIORITY_MAIN, 0, cli_thread,
(void *)i, NULL);
}
return 0;
}
void *cli_thread(void *arg)
{
/* Test Program variables */
int tid = (int) arg;
uint32_t cycles = 0;
uint32_t cycles_ok = 0;
uint32_t failed_payload_verifications = 0;
/* Transmission Control Block */
gnrc_tcp_tcb_t tcb;
/* Target Peer Address Information */
ipv6_addr_t target_addr;
uint16_t target_port;
/* Initialize Target Information */
ipv6_addr_from_str(&target_addr, TARGET_ADDR);
target_port = TARGET_PORT;
printf("Client running: TID=%d\n", tid);
while (cycles < CYCLES) {
/* Initialize tcb struct */
gnrc_tcp_tcb_init(&tcb);
/* Connect to Peer */
int ret = gnrc_tcp_open_active(&tcb, AF_INET6, (uint8_t *) &target_addr, target_port, 0);
switch (ret) {
case 0:
DEBUG("TID=%d : gnrc_tcp_open_active() : 0 : ok\n", tid);
break;
case -EISCONN:
printf("TID=%d : gnrc_tcp_open_active() : -EISCONN\n", tid);
return 0;
case -EINVAL:
printf("TID=%d : gnrc_tcp_open_active() : -EINVAL\n", tid);
return 0;
case -EAFNOSUPPORT:
printf("TID=%d : gnrc_tcp_open_active() : -EAFNOSUPPORT\n", tid);
return 0;
case -EADDRINUSE:
printf("TID=%d : gnrc_tcp_open_active() : -EADDRINUSE\n", tid);
return 0;
case -ECONNREFUSED:
printf("TID=%d : gnrc_tcp_open_active() : -ECONNREFUSED : retry after 10sec\n",
tid);
xtimer_sleep(10);
continue;
case -ENOMEM:
printf("TID=%d : gnrc_tcp_open_active() : -ENOMEM\n", tid);
return 0;
case -ETIMEDOUT:
printf("TID=%d : gnrc_tcp_open_active() : -ETIMEDOUT : retry after 10sec\n",
tid);
xtimer_sleep(10);
continue;
default:
printf("TID=%d : gnrc_tcp_open_active() : %d\n", tid, ret);
return 0;
}
/* Fill Buffer with a test pattern */
for (size_t i=0; i < sizeof(bufs[tid]); ++i){
bufs[tid][i] = TEST_PATERN_CLI;
}
/* Send Data, stop if errors were found */
for (size_t sent = 0; sent < sizeof(bufs[tid]) && ret >= 0; sent += ret) {
ret = gnrc_tcp_send(&tcb, bufs[tid] + sent, sizeof(bufs[tid]) - sent, 0);
switch (ret) {
case -ENOTCONN:
printf("TID=%d : gnrc_tcp_send() : -ENOTCONN\n", tid);
break;
case -ECONNABORTED:
printf("TID=%d : gnrc_tcp_send() : -ECONNABORTED\n", tid);
break;
case -ETIMEDOUT:
printf("TID=%d : gnrc_tcp_send() : -ETIMEDOUT\n", tid);
break;
case -ECONNRESET:
printf("TID=%d : gnrc_tcp_send() : -ECONNRESET\n", tid);
break;
default:
if (ret >= 0) {
DEBUG("TID=%d : gnrc_tcp_send() : %d Bytes sent\n", tid, ret);
}
else {
printf("TID=%d : gnrc_tcp_send() : %d\n", tid, ret);
return 0;
}
}
}
/* Receive Data, stop if errors were found */
for (size_t rcvd = 0; rcvd < sizeof(bufs[tid]) && ret >= 0; rcvd += ret) {
ret = gnrc_tcp_recv(&tcb, (void *)(bufs[tid] + rcvd), sizeof(bufs[tid]) - rcvd,
GNRC_TCP_CONNECTION_TIMEOUT_DURATION);
switch (ret) {
case -ENOTCONN:
printf("TID=%d : gnrc_tcp_rcvd() : -ENOTCONN\n", tid);
break;
case -EAGAIN:
printf("TID=%d : gnrc_tcp_rcvd() : -EAGAIN : retry after 10sec\n", tid);
ret = 0;
xtimer_sleep(10);
break;
case -ECONNABORTED:
printf("TID=%d : gnrc_tcp_rcvd() : -ECONNABORTED\n", tid);
break;
case -ECONNRESET:
printf("TID=%d : gnrc_tcp_rcvd() : -ECONNRESET\n", tid);
break;
case -ETIMEDOUT:
printf("TID=%d : gnrc_tcp_rcvd() : -ETIMEDOUT\n", tid);
break;
default:
if (ret >= 0) {
DEBUG("TID=%d : gnrc_tcp_rcvd() : %d Bytes read.\n", tid, ret);
}
else {
printf("TID=%d : gnrc_tcp_rcvd() : %d\n", tid, ret);
return 0;
}
}
}
/* If there was no error: Check received pattern */
for (size_t i=0; i < sizeof(bufs[tid]); ++i) {
if (bufs[tid][i] != TEST_PATERN_SRV) {
printf("TID=%d : Payload verfication failed\n", tid);
failed_payload_verifications += 1;
break;
}
}
/* Close Connection */
gnrc_tcp_close(&tcb);
/* Gather Data */
cycles += 1;
if(ret >= 0) {
cycles_ok += 1;
}
printf("TID=%d : %"PRIi32" test cycles completed. %"PRIi32" ok, %"PRIi32" faulty",
tid, cycles, cycles_ok, cycles - cycles_ok);
printf(", %"PRIi32" failed payload verifications\n", failed_payload_verifications);
}
printf("client thread terminating: TID=%d\n", tid);
return 0;
}

42
examples/gnrc_tcp_srv/Makefile

@ -0,0 +1,42 @@
# name of your application
APPLICATION = gnrc_tcp_srv
# If no BOARD is found in the environment, use this default:
BOARD ?= native
PORT ?= tap0
TCP_LOCAL_PORT ?= 80
# Mark Boards with insufficient memory
BOARD_INSUFFICIENT_MEMORY := airfy-beacon arduino-duemilanove arduino-mega2560\
arduino-uno calliope-mini chronos microbit sb-430\
sb-430h nrf51dongle nrf6310 nucleo-f030 nucleo-f042\
nucleo32-f042 nucleo-f070 nucleo-f072 nucleo32-f303\
nucleo-f334 pca10000 pca10005 stm32f0discovery\
telosb weio wsn430-v1_3b wsn430-v1_4\
yunjia-nrf51822 z1 msb-430 msb-430h
# This has to be the absolute path to the RIOT base directory:
RIOTBASE ?= $(CURDIR)/../..
# Specify local Port to open
CFLAGS += -DLOCAL_PORT=$(TCP_LOCAL_PORT)
# Comment this out to disable code in RIOT that does safety checking
# which is not needed in a production environment but helps in the
# development process:
#CFLAGS += -DDEVELHELP
# Change this to 0 show compiler invocation lines by default:
QUIET ?= 1
# Modules to include
USEMODULE += gnrc_netdev_default
USEMODULE += auto_init_gnrc_netif
USEMODULE += gnrc_ipv6_default
USEMODULE += gnrc_tcp
# include this for printing IP addresses
USEMODULE += shell_commands
include $(RIOTBASE)/Makefile.include

203
examples/gnrc_tcp_srv/main.c

@ -0,0 +1,203 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <stdio.h>
#include <errno.h>
#include "thread.h"
#include "net/af.h"
#include "net/gnrc/ipv6.h"
#include "net/gnrc/tcp.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
/* Number of possible parallel connections */
#ifndef CONNS
#define CONNS 1
#endif
/* Amount of data to transmit */
#ifndef NBYTE
#define NBYTE (2048)
#endif
/* Test Pattern used by Client Application */
#ifndef TEST_PATERN_CLI
#define TEST_PATERN_CLI (0xF0)
#endif
/* Test Pattern used by Server Application */
#ifndef TEST_PATERN_SRV
#define TEST_PATERN_SRV (0xA7)
#endif
uint8_t bufs[CONNS][NBYTE];
uint8_t stacks[CONNS][THREAD_STACKSIZE_DEFAULT + THREAD_EXTRA_STACKSIZE_PRINTF];
/* ifconfig shell command */
extern int _netif_config(int argc, char **argv);
/* Server Thread */
void *srv_thread(void *arg);
int main(void)
{
/* Print all configured addresses of the server */
printf("\nStarting server: LOCAL_PORT=%d, CONNS=%d, NBYTE=%d\n\n", LOCAL_PORT, CONNS, NBYTE);
printf("Printing Servers Network Configuration:\n");
_netif_config(0, NULL);
/* Start Threads to handle each connection */
for (int i = 0; i < CONNS; i += 1) {
thread_create((char *)stacks[i], sizeof(stacks[i]), THREAD_PRIORITY_MAIN, 0, srv_thread,
(void *)i, NULL);
}
return 0;
}
void *srv_thread(void *arg)
{
int tid = (int)arg;
uint32_t cycles = 0;
uint32_t cycles_ok = 0;
uint32_t failed_payload_verifications = 0;
/* Transmission control block */
gnrc_tcp_tcb_t tcb;
/* Connection handling code */
printf("Server running: TID=%d\n", tid);
while (1) {
/* Initialize tcb struct */
gnrc_tcp_tcb_init(&tcb);
/* Connect to Peer */
int ret = gnrc_tcp_open_passive(&tcb, AF_INET6, NULL, LOCAL_PORT);
switch (ret) {
case 0:
DEBUG("TID=%d : gnrc_tcp_open_passive() : 0 : ok\n", tid);
break;
case -EISCONN:
printf("TID=%d : gnrc_tcp_open_passive() : -EISCONN\n", tid);
return 0;
case -EINVAL:
printf("TID=%d : gnrc_tcp_open_passive() : -EINVAL\n", tid);
return 0;
case -EAFNOSUPPORT:
printf("TID=%d : gnrc_tcp_open_passive() : -EAFNOSUPPORT\n", tid);
return 0;
case -ENOMEM:
printf("TID=%d : gnrc_tcp_open_passive() : -ENOMEM\n", tid);
return 0;
default:
printf("TID=%d : gnrc_tcp_open_passive() : %d\n", tid, ret);
return 0;
}
/* Receive Data, stop if errors were found */
for (size_t rcvd = 0; rcvd < sizeof(bufs[tid]) && ret >= 0; rcvd += ret) {
ret = gnrc_tcp_recv(&tcb, (void *)(bufs[tid] + rcvd), sizeof(bufs[tid]) - rcvd,
GNRC_TCP_CONNECTION_TIMEOUT_DURATION);
switch (ret) {
case -ENOTCONN:
printf("TID=%d : gnrc_tcp_rcvd() : -ENOTCONN\n", tid);
break;
case -EAGAIN:
printf("TID=%d : gnrc_tcp_rcvd() : -EAGAIN : retry after 10sec\n", tid);
ret = 0;
xtimer_sleep(10);
break;
case -ECONNABORTED:
printf("TID=%d : gnrc_tcp_rcvd() : -ECONNABORTED\n", tid);
break;
case -ECONNRESET:
printf("TID=%d : gnrc_tcp_rcvd() : -ECONNRESET\n", tid);
break;
case -ETIMEDOUT:
printf("TID=%d : gnrc_tcp_rcvd() : -ETIMEDOUT\n", tid);
break;
default:
if (ret >= 0) {
DEBUG("TID=%d : gnrc_tcp_rcvd() : %d Bytes read\n", tid, ret);
}
else {
printf("TID=%d : gnrc_tcp_rcvd() : %d\n", tid, ret);
return 0;
}
}
}
/* Check received pattern */
for (size_t i=0; i < sizeof(bufs[tid]); ++i) {
if (bufs[tid][i] != TEST_PATERN_CLI) {
printf("TID=%d : Payload verfication failed\n", tid);
failed_payload_verifications += 1;
break;
}
}
/* Fill Buffer with a test pattern */
for (size_t i=0; i < sizeof(bufs[tid]); ++i) {
bufs[tid][i] = TEST_PATERN_SRV;
}
/* Send Data, stop if errors were found */
for (size_t sent = 0; sent < sizeof(bufs[tid]) && ret >= 0; sent += ret) {
ret = gnrc_tcp_send(&tcb, bufs[tid] + sent, sizeof(bufs[tid]) - sent, 0);
switch (ret) {
case -ENOTCONN:
printf("TID=%d : gnrc_tcp_send() : -ENOTCONN\n", tid);
break;
case -ECONNABORTED:
printf("TID=%d : gnrc_tcp_send() : -ECONNABORTED\n", tid);
break;
case -ETIMEDOUT:
printf("TID=%d : gnrc_tcp_send() : -ETIMEDOUT\n", tid);
break;
case -ECONNRESET:
printf("TID=%d : gnrc_tcp_send() : -ECONNRESET\n", tid);
break;
default:
if (ret >= 0) {
DEBUG("TID=%d : gnrc_tcp_send() : %d Bytes sent.\n", tid, ret);
}
else {
printf("TID=%d : gnrc_tcp_send() : %d\n", tid, ret);
return 0;
}
}
}
/* Close Connection */
gnrc_tcp_close(&tcb);
/* Gather Data */
cycles += 1;
if(ret >= 0) {
cycles_ok += 1;
}
printf("TID=%d : %"PRIi32" test cycles completed. %"PRIi32" ok, %"PRIi32" faulty",
tid, cycles, cycles_ok, cycles - cycles_ok);
printf(", %"PRIi32" failed payload verifications\n", failed_payload_verifications);
}
return 0;
}

8
sys/auto_init/auto_init.c

@ -76,6 +76,10 @@
#include "net/gnrc/udp.h"
#endif
#ifdef MODULE_GNRC_TCP
#include "net/gnrc/tcp.h"
#endif
#ifdef MODULE_LWIP
#include "lwip.h"
#endif
@ -152,6 +156,10 @@ void auto_init(void)
DEBUG("Auto init UDP module.\n");
gnrc_udp_init();
#endif
#ifdef MODULE_GNRC_TCP
DEBUG("Auto init TCP module\n");
gnrc_tcp_init();
#endif
#ifdef MODULE_DHT
DEBUG("Auto init DHT devices.\n");
extern void dht_auto_init(void);

231
sys/include/net/gnrc/tcp.h

@ -0,0 +1,231 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief TCP interface definition
*
* @author Simon Brummer <simon.brummer@haw-hamburg.de>
*/
#ifndef GNRC_TCP_H_
#define GNRC_TCP_H_
#include "net/gnrc/netapi.h"
#include "net/gnrc/nettype.h"
#include "net/gnrc/tcp/hdr.h"
#include "net/gnrc/tcp/tcb.h"
#ifdef MODULE_GNRC_IPV6
#include "net/gnrc/ipv6.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Port unspecified.
*
* @note PORT 0 is reserved, according to rfc 1700(https://www.ietf.org/rfc/rfc1700.txt)
*/
#define GNRC_TCP_PORT_UNSPEC 0
/**
* @brief Head of conn linked list.
*/
extern gnrc_tcp_tcb_t *_list_gnrc_tcp_tcb_head;
/**
* @brief Mutex to protect linked list.
*/
extern mutex_t _list_gnrc_tcp_tcb_lock;
/**
* @brief Initialize and start TCP
*
* @return PID of TCP thread on success
* @return -1 if thread is already running.
* @return -EINVAL, if priority is greater than or equal SCHED_PRIO_LEVELS
* @return -EOVERFLOW, if there are too many threads running.
*/
int gnrc_tcp_init(void);
/**
* @brief Initialize Transmission Control Block (tcb)
* @pre tcb must not be NULL.
*
* @param[in,out] tcb Transmission that should be initialized.
*/
void gnrc_tcp_tcb_init(gnrc_tcp_tcb_t* tcb);
/**
* @brief Opens a connection actively.
*
* @pre gnrc_tcp_tcb_init() must have been successfully called.
* @pre tcb must not be NULL
* @pre target_addr must not be NULL.
* @pre target_port must not be 0.
*
* @note Blocks until a connection has been established or an error occured.
*
* @param[in,out] tcb This connections Transmission control block.
* @param[in] address_family Address Family of @p target_addr.
* @param[in] target_addr Pointer to target address.
* @param[in] target_port Targets port number.
* @param[in] local_port If zero or GNRC_TCP_PORT_UNSPEC, the connections
* source port is randomly choosen. If local_port is non-zero
* the local_port is used as source port.
*
* @return Zero on success.
* @return -EAFNOSUPPORT if @p address_family is not supported.
* @return -EINVAL if @p address_family is not the same the address_family use by the tcb.
* @return -EISCONN if transmission control block is already in use.
* @return -ENOMEM if the receive buffer for the tcb could not be allocated.
* Increase "GNRC_TCP_RCV_BUFFERS".
* @return -EADDRINUSE if @p local_port is already used by another connection.
* @return -ETIMEDOUT if the connection could not be opened.
* @return -ECONNREFUSED if the connection was resetted by the peer.
*/
int gnrc_tcp_open_active(gnrc_tcp_tcb_t *tcb, const uint8_t address_family,
const uint8_t *target_addr, const uint16_t target_port,
const uint16_t local_port);
/**
* @brief Opens a connection passively, by waiting for an incomming request.
*
* @pre gnrc_tcp_tcb_init() must have been successfully called.
* @pre tcb must not be NULL.
* @pre if local_addr is not NULL, local_addr must be assigned to a network interface.
* @pre if local_port is not zero.
*
* @note Blocks until a connection has been established (incomming connection request
* to @p local_port) or an error occured.
*
* @param[in,out] tcb This connections Transmission control block.
* @param[in] address_family Address Family of @p local_addr.
* If local_addr == NULL, address_family is ignored.
* @param[in] local_addr If not NULL the connection is bound to the address in @p local_addr.
* If NULL a connection request to every local ip address is valid.
* @param[in] local_port Portnumber that should used for incomming connection requests.
*
* @return Zero on success
* @return -EAFNOSUPPORT if local_addr != NULL and @p address_family is not supported.
* @return -EINVAL if @p address_family is not the same the address_family use by the tcb.
* @return -EISCONN if transmission control block is already in use.
* @return -ENOMEM if the receive buffer for the tcb could not be allocated.
* Increase "GNRC_TCP_RCV_BUFFERS".
*/
int gnrc_tcp_open_passive(gnrc_tcp_tcb_t *tcb, const uint8_t address_family,
const uint8_t *local_addr, const uint16_t local_port);
/**
* @brief Transmit Data to Peer.
*
* @pre gnrc_tcp_tcb_init() must have been successfully called.
* @pre tcb must not be NULL.
* @pre data must not be NULL.
*
* @note Blocks until up to @p len bytes were transmitted or an error occured.
*
* @param[in,out] tcb This connections Transmission control block.
* @param[in] data Pointer to the data that should be transmitted.
* @param[in] len Number of bytes that should be transmitted.
* @param[in] user_timeout_duration_us If not zero and there were not data transmitted
* successfully, the function call returns after
* user_timeout_duration_us. If zero not timeout will be
* triggered.
*
* @return On success, the number of successfully transmitted bytes.
* @return -ENOTCONN if connection is not established.
* @return -ECONNRESET if connection was resetted by the peer.
* @return -ECONNABORTED if the connection was aborted.
* @return -ETIMEDOUT if @p user_timeout_duration_us expired.
*/
ssize_t gnrc_tcp_send(gnrc_tcp_tcb_t *tcb, const void *data, const size_t len,
const uint32_t user_timeout_duration_us);
/**
* @brief Receive Data from the Peer.
*
* @pre gnrc_tcp_tcb_init() must have been successfully called.
* @pre tcb must not be NULL.
* @pre data must not be NULL.
*
* @note Function blocks if user_timeout_duration_us is not zero.
*
* @param[in,out] tcb This connections Transmission control block.
* @param[out] data Pointer to the buffer where the received data
* should be copied into.
* @param[in] max_len Maximum amount to bytes that should be reeived.
* Should not exceed size of @p data.
* @param[in] user_timeout_duration_us Timeout for receive in microseconds. If zero and no data
* is available, the function returns immediately. If not
* zero the function block until data is available or
* user_timeout_duration_us microseconds have passed.
*
* @return On success, the number of bytes read into @p data.
* @return -ENOTCONN if connection is not established.
* @return -EAGAIN if user_timeout_duration_us is zero and no data is available.
* @return -ECONNRESET if connection was resetted by the peer.
* @return -ECONNABORTED if the connection was aborted.
* @return -ETIMEDOUT if @p user_timeout_duration_us expired.
*/
ssize_t gnrc_tcp_recv(gnrc_tcp_tcb_t *tcb, void *data, const size_t max_len,
const uint32_t user_timeout_duration_us);
/**
* @brief Close a tcp connection.
*
* @pre gnrc_tcp_tcb_init() must have been successfully called.
* @pre tcb must not be NULL.
*
* @param[in,out] tcb This connections Transmission control block.
*
* @return Zero on success.
*/
int gnrc_tcp_close(gnrc_tcp_tcb_t *tcb);
/**
* @brief Set checksum calculated from tcp and network-layer header in tcp-header.
*
* @param[in] hdr ng_pktsnip that contains tcp header.
* @param[in] pseudo_hdr ng_pktsnip that contains networklayer header.
*
* @return zero on succeed.
* @return -EFAULT if hdr or pseudo_hdr were NULL
* @return -EBADMSG if hdr is not of type GNRC_NETTYPE_TCP
* @return -ENOENT if pseudo_hdr protocol is unsupported.
*/
int gnrc_tcp_calc_csum(const gnrc_pktsnip_t *hdr, const gnrc_pktsnip_t *pseudo_hdr);
/**
* @brief Adds a tcp header to a given payload. Be carefull, leads to huge headers.
* Allocates all option bytes
*
* @param[in] payload payload that follows the tcp header
* @param[in] src Source port in host byte order
* @param[in] dst Destination port in host byte order
*
* @return NULL, if paket buffer is full
* @return Not NULL on success
*/
gnrc_pktsnip_t *gnrc_tcp_hdr_build(gnrc_pktsnip_t *payload, uint16_t src, uint16_t dst);
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_H_ */
/** @} */

182
sys/include/net/gnrc/tcp/config.h

@ -0,0 +1,182 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief TCP configuration, includes buffersizes, timeout durations
*
* @author Simon Brummer <simon.brummer@haw-hamburg.de>
*/
#ifndef GNRC_TCP_CONFIG_H_
#define GNRC_TCP_CONFIG_H_
#include "timex.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Status Flags for TCP
* @{
*/
#define GNRC_TCP_STATUS_PASSIVE (1 << 0)
#define GNRC_TCP_STATUS_ACCEPTED (1 << 1)
#define GNRC_TCP_STATUS_ALLOW_ANY_ADDR (1 << 2)
/** @} */
/**
* @brief Timeout Duration for user calls. Default 2 minutes
*/
#ifndef GNRC_TCP_CONNECTION_TIMEOUT_DURATION
#define GNRC_TCP_CONNECTION_TIMEOUT_DURATION (120 * US_PER_SEC)
#endif
/**
* @brief Maximum Segment Lifetime. Default 30 secounds
*/
#ifndef GNRC_TCP_MSL
#define GNRC_TCP_MSL (30 * US_PER_SEC)
#endif
/**
* @brief Message queue size for the TCP handling thread
*/
#ifndef GNRC_TCP_MSG_QUEUE_SIZE
#define GNRC_TCP_MSG_QUEUE_SIZE (8U)
#endif
/**
* @brief Priority of the tcp handling thread, must be lower than the applications prio.
*/
#ifndef GNRC_TCP_PRIO
#define GNRC_TCP_PRIO (THREAD_PRIORITY_MAIN - 2U)
#endif
/**
* @brief Default stack size for the TCP handling thread
*/
#ifndef GNRC_TCP_STACK_SIZE
#define GNRC_TCP_STACK_SIZE (THREAD_STACKSIZE_DEFAULT)
#endif
/**
* @brief Maximum Segement Size
*/
#ifndef GNRC_TCP_MSS
#ifdef MODULE_GNRC_IPV6
#define GNRC_TCP_MSS (1220U) /**< If IPv6 is used. Get MSS = 1280 - IPv6-Hdr - TCP-Hdr = 1220 */
#else
#define GNRC_TCP_MSS (576U) /**< Default MSS */
#endif
#endif
/**
* @brief MSS Multiplicator = Number of MSS sized packets stored in receive buffer
*/
#ifndef GNRC_TCP_MSS_MULTIPLICATOR
#define GNRC_TCP_MSS_MULTIPLICATOR (1U)
#endif
/**
* @brief Default Window Size
*/
#ifndef GNRC_TCP_DEFAULT_WINDOW
#define GNRC_TCP_DEFAULT_WINDOW (GNRC_TCP_MSS * GNRC_TCP_MSS_MULTIPLICATOR)
#endif
/**
* @brief Number of preallocated receive buffers
*/
#ifndef GNRC_TCP_RCV_BUFFERS
#define GNRC_TCP_RCV_BUFFERS 1
#endif
/**
* @brief Default Receive Buffer Size
*/
#ifndef GNRC_TCP_RCV_BUF_SIZE
#define GNRC_TCP_RCV_BUF_SIZE (GNRC_TCP_DEFAULT_WINDOW)
#endif
/**
* @brief Lower Bound for RTO = 1 sec (see RFC 6298)
*/
#ifndef GNRC_TCP_RTO_LOWER_BOUND
#define GNRC_TCP_RTO_LOWER_BOUND (1 * US_PER_SEC)
#endif
/**
* @brief Upper Bound for RTO = 60 sec (see RFC 6298)
*/
#ifndef GNRC_TCP_RTO_UPPER_BOUND
#define GNRC_TCP_RTO_UPPER_BOUND (60 * US_PER_SEC)
#endif
/**
* @brief Assumes clock granularity for TCP of 10 ms (see RFC 6298)
*/
#ifndef GNRC_TCP_RTO_GRANULARITY
#define GNRC_TCP_RTO_GRANULARITY (10 * MS_PER_SEC)
#endif
/**
* @brief Alpha value for RTO calculation, default is 1/8
*/
#ifndef GNRC_TCP_RTO_A_DIV
#define GNRC_TCP_RTO_A_DIV (8U)
#endif
/**
* @brief Beta value for RTO calculation, default is 1/4
*/
#ifndef GNRC_TCP_RTO_B_DIV
#define GNRC_TCP_RTO_B_DIV (4U)
#endif
/**
* @brief K value for RTO calculation, default is 4
*/
#ifndef GNRC_TCP_RTO_K
#define GNRC_TCP_RTO_K (4U)
#endif
/**
* @brief Macro to mark is the time measurement is uninitialized
*/
#ifndef GNRC_TCP_RTO_UNINITIALIZED
#define GNRC_TCP_RTO_UNINITIALIZED (-1)
#endif
/**
* @brief Lower Bound for the duration between probes
*/
#ifndef GNRC_TCP_PROBE_LOWER_BOUND
#define GNRC_TCP_PROBE_LOWER_BOUND (1 * US_PER_SEC)
#endif
/**
* @brief Upper Bound for the duration between probes
*/
#ifndef GNRC_TCP_PROBE_UPPER_BOUND
#define GNRC_TCP_PROBE_UPPER_BOUND (60 * US_PER_SEC)
#endif
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_CONFIG_H_ */
/** @} */

68
sys/include/net/gnrc/tcp/fsm.h

@ -0,0 +1,68 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief Definies states and events for TCP finite state maschine
*
* @author Simon Brummer <brummer.simon@googlemail.com>
*/
#ifndef GNRC_TCP_FSM_H_
#define GNRC_TCP_FSM_H_
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief The TCP FSM States.
*/
typedef enum {
GNRC_TCP_FSM_STATE_CLOSED,
GNRC_TCP_FSM_STATE_LISTEN,
GNRC_TCP_FSM_STATE_SYN_SENT,
GNRC_TCP_FSM_STATE_SYN_RCVD,
GNRC_TCP_FSM_STATE_ESTABLISHED,
GNRC_TCP_FSM_STATE_CLOSE_WAIT,
GNRC_TCP_FSM_STATE_LAST_ACK,
GNRC_TCP_FSM_STATE_FIN_WAIT_1,
GNRC_TCP_FSM_STATE_FIN_WAIT_2,
GNRC_TCP_FSM_STATE_CLOSING,
GNRC_TCP_FSM_STATE_TIME_WAIT
} gnrc_tcp_fsm_state_t;
/**
* @brief Events that trigger translations in TCP FSM.
*/
typedef enum {
GNRC_TCP_FSM_EVENT_CALL_OPEN, /* User function call: open */
GNRC_TCP_FSM_EVENT_CALL_SEND, /* User function call: send */
GNRC_TCP_FSM_EVENT_CALL_RECV, /* User function call: recv */
GNRC_TCP_FSM_EVENT_CALL_CLOSE, /* User function call: close */
GNRC_TCP_FSM_EVENT_CALL_ABORT, /* User function call: abort */
GNRC_TCP_FSM_EVENT_RCVD_PKT, /* Paket received from peer */
GNRC_TCP_FSM_EVENT_TIMEOUT_TIMEWAIT, /* Timeout: Timewait */
GNRC_TCP_FSM_EVENT_TIMEOUT_RETRANSMIT, /* Timeout: Retransmit */
GNRC_TCP_FSM_EVENT_TIMEOUT_CONNECTION, /* Timeout: Connection */
GNRC_TCP_FSM_EVENT_SEND_PROBE, /* Send a Zero Window Probe */
GNRC_TCP_FSM_EVENT_CLEAR_RETRANSMIT /* Clear Retransmission Mechanism */
} gnrc_tcp_fsm_event_t;
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_FSM_H_ */
/** @} */

56
sys/include/net/gnrc/tcp/hdr.h

@ -0,0 +1,56 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief TCP Header
*
* @author Simon Brummer <brummer.simon@googlemail.com>
*/
#ifndef GNRC_TCP_HDR_H_
#define GNRC_TCP_HDR_H_
#include "byteorder.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief TCP Options could contain up to 10 32-Bit values of Information.
*/
#define TCP_MAX_HDR_OPTIONS 10
/**
* @brief TCP header definition
*/
typedef struct __attribute__((packed)) {
network_uint16_t src_port; /**< source port, in network byte order */
network_uint16_t dst_port; /**< destination port, in network byte order */
network_uint32_t seq_num; /**< sequence number, in network byte order */
network_uint32_t ack_num; /**< Acknowledgement number, in network byte order */
network_uint16_t off_ctl; /**< Data Offset and control Bits in network byte order */
network_uint16_t window; /**< window, in network byte order */
network_uint16_t checksum; /**< checksum, in network byte order */
network_uint16_t urgent_ptr; /**< urgent pointer, in network byte order */
network_uint32_t options[TCP_MAX_HDR_OPTIONS]; /**< Option Fields (Optional) */
} tcp_hdr_t;
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_TCB_H_ */
/** @} */

86
sys/include/net/gnrc/tcp/tcb.h

@ -0,0 +1,86 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_tcp TCP
* @ingroup net_gnrc
* @brief RIOT's tcp implementation for the gnrc stack
*
* @{
*
* @file
* @brief Transmission Control Block definition
*
* @author Simon Brummer <simon.brummer@haw-hamburg.de>
*/
#ifndef GNRC_TCP_TCB_H_
#define GNRC_TCP_TCB_H_
#include <stdint.h>
#include <ringbuffer.h>
#include <xtimer.h>
#include <mutex.h>
#include <msg.h>
#include "net/gnrc.h"
#include "fsm.h"
#include "config.h"
#ifdef MODULE_GNRC_IPV6
#include "net/gnrc/ipv6.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief transmission control block of gnrc_tcp
*/
typedef struct _transmission_control_block {
uint8_t address_family; /**< Address Family of local_addr and peer_addr */
#ifdef MODULE_GNRC_IPV6
uint8_t local_addr[sizeof(ipv6_addr_t)]; /**< local IP address */
uint8_t peer_addr[sizeof(ipv6_addr_t)]; /**< peer IP address */
#endif
uint16_t local_port; /**< local connections port number */
uint16_t peer_port; /**< port connections port number */
gnrc_tcp_fsm_state_t state; /**< Connections state */
uint8_t status; /**< A connections status flags */
uint32_t snd_una; /**< Send Unacknowledged */
uint32_t snd_nxt; /**< Send Next */
uint16_t snd_wnd; /**< Send Window */
uint32_t snd_wl1; /**< SeqNo. Last Windowupdate */
uint32_t snd_wl2; /**< AckNo. Last Windowupdate */
uint32_t rcv_nxt; /**< Receive Next */
uint16_t rcv_wnd; /**< Receive Window */
uint32_t iss; /**< Initial Sequence Number */
uint32_t irs; /**< Initial Received Sequence Number */
uint16_t mss; /**< The peers MSS */
uint32_t rtt_start; /**< Timer value for rtt estimation */
int32_t rtt_var; /**< Round Trip Time variance */
int32_t srtt; /**< Smoothed Round Trip Time */
int32_t rto; /**< Retransmission Timeout Duration */
uint8_t retries; /**< Number of Retransmissions */
xtimer_t tim_tout; /**< Timer struct for timeouts */
msg_t msg_tout; /**< Message, sent on timeouts */
gnrc_pktsnip_t *pkt_retransmit; /**< Pointer to Packet in "retransmit queue" */
kernel_pid_t owner; /**< PID of this connection handling thread */
msg_t msg_queue[GNRC_TCP_MSG_QUEUE_SIZE]; /**< Message queue used for asynchronious operation */
uint8_t *rcv_buf_raw; /**< Pointer to the receive buffer */
ringbuffer_t rcv_buf; /**< Receive Buffer data structure */
mutex_t fsm_lock; /**< Mutex for FSM access synchronization */
mutex_t function_lock; /**< Mutex for Function call synchronization */
struct _transmission_control_block *next; /**< Pointer next TCP connection */
} gnrc_tcp_tcb_t;
#ifdef __cplusplus
}
#endif
#endif /* GNRC_TCP_TCB_H_ */
/** @} */

3
sys/net/gnrc/Makefile

@ -130,6 +130,9 @@ endif
ifneq (,$(filter gnrc_udp,$(USEMODULE)))
DIRS += transport_layer/udp
endif
ifneq (,$(filter gnrc_tcp,$(USEMODULE)))
DIRS += transport_layer/tcp
endif
ifneq (,$(filter gnrc_zep,$(USEMODULE)))
DIRS += application_layer/zep
endif

1
sys/net/gnrc/netreg/gnrc_netreg.c

@ -23,6 +23,7 @@
#include "net/gnrc/icmpv6.h"
#include "net/gnrc/ipv6.h"
#include "net/gnrc/udp.h"
#include "net/gnrc/tcp.h"
#define _INVALID_TYPE(type) (((type) < GNRC_NETTYPE_UNDEF) || ((type) >= GNRC_NETTYPE_NUMOF))

3
sys/net/gnrc/transport_layer/tcp/Makefile

@ -0,0 +1,3 @@
MODULE = gnrc_tcp
include $(RIOTBASE)/Makefile.base

616
sys/net/gnrc/transport_layer/tcp/gnrc_tcp.c

@ -0,0 +1,616 @@
/*
* Copyright (C) 2015 Simon Brummer
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup net_gnrc
* @{
*
* @file
* @brief GNRC's TCP implementation
*
* @author Simon Brummer <brummer.simon@googlemail.com>
* @}
*/
#include <stdint.h>
#include <errno.h>
#include <utlist.h>
#include "msg.h"
#include "assert.h"
#include "thread.h"
#include "byteorder.h"
#include "random.h"
#include "xtimer.h"
#include "mutex.h"
#include "ringbuffer.h"
#include "net/af.h"
#include "net/gnrc/nettype.h"
#include "net/gnrc/netapi.h"
#include "net/gnrc/netreg.h"
#include "net/gnrc/pktbuf.h"
#include "net/gnrc/tcp.h"
#include "internal/fsm.h"
#include "internal/pkt.h"
#include "internal/option.h"
#include "internal/helper.h"
#include "internal/eventloop.h"
#include "internal/rcvbuf.h"
#ifdef MODULE_GNRC_IPV6
#include "net/gnrc/ipv6.h"
#endif
#define ENABLE_DEBUG (0)
#include "debug.h"
/**
* @brief Allocate memory for TCP thread's stack
*/
#if ENABLE_DEBUG
static char _stack[GNRC_TCP_STACK_SIZE + THREAD_EXTRA_STACKSIZE_PRINTF];
#else
static char _stack[GNRC_TCP_STACK_SIZE];
#endif
/**
* @brief TCPs eventloop pid, declared externally
*/
kernel_pid_t _gnrc_tcp_pid = KERNEL_PID_UNDEF;
/**
* @brief Head of liked list of active connections
*/
gnrc_tcp_tcb_t *_list_gnrc_tcp_tcb_head;
/**
* @brief Mutex to protect the connection list
*/
mutex_t _list_gnrc_tcp_tcb_lock;
/**
* @brief Establishes a new TCP connection
*
* @param[in/out] tcb This connections Transmission control block.
* @param[in] target_addr Target Address to connect to, if this is a active connection.
* @param[in] target_port Target Port to connect to, if this is a active connection.
* @param[in] local_addr Local Address to bind on, if this is a passive connection.
* @param[in] local_port Local Port to bind on, if this is a passive connection.
* @param[in] passive Flag to indicate if this is a active or passive open.
*
* @return 0 on success.
* @return -EISCONN if transmission control block is already in use.
* @return -ENOMEM if the receive buffer for the tcb could not be allocated.
* Increase "GNRC_TCP_RCV_BUFFERS".
* @return -EADDRINUSE if @p local_port is already used by another connection. Only active mode.
* @return -ETIMEDOUT if the connection could not be opened. Only active mode.
* @return -ECONNREFUSED if the connection was resetted by the peer.
*/
static int _gnrc_tcp_open(gnrc_tcp_tcb_t *tcb, const uint8_t *target_addr, uint16_t target_port,
const uint8_t *local_addr, uint16_t local_port, uint8_t passive)
{
msg_t msg; /* Message for incomming Messages */
msg_t connection_timeout_msg; /* Connection Timeout Message */
xtimer_t connection_timeout_timer; /* Connection Timeout Timer */
int8_t ret = 0; /* Return Value */
/* Lock the tcb for this function call */
mutex_lock(&(tcb->function_lock));
/* Connection is already connected: Return -EISCONN */
if (tcb->state != GNRC_TCP_FSM_STATE_CLOSED) {
mutex_unlock(&(tcb->function_lock));
return -EISCONN;
}
/* Setup connection (common parts) */
msg_init_queue(tcb->msg_queue, GNRC_TCP_MSG_QUEUE_SIZE);
tcb->owner = thread_getpid();
/* Setup passive connection */
if (passive){
/* Set Status Flags */
tcb->status |= GNRC_TCP_STATUS_PASSIVE;
if (local_addr == NULL) {
tcb->status |= GNRC_TCP_STATUS_ALLOW_ANY_ADDR;
}
/* If local address is specified: Copy it into tcb: only connections to this addr are ok */
else {
switch (tcb->address_family) {
#ifdef MODULE_GNRC_IPV6
case AF_INET6:
memcpy(tcb->local_addr, local_addr, sizeof(ipv6_addr_t));
break;
#endif
}
}
/* Assign Port to listen on, to tcb */
tcb->local_port = local_port;
}
/* Setup active connection */
else{
/* Copy Target Address and Port into tcb structure */
if (target_addr != NULL) {
switch (tcb->address_family) {
#ifdef MODULE_GNRC_IPV6
case AF_INET6:
memcpy(tcb->peer_addr, target_addr, sizeof(ipv6_addr_t));
break;
#endif
}
}
/* Copy Port Information, verfication happens in fsm */
tcb->local_port = local_port;
tcb->peer_port = target_port;
/* Setup Timeout: If connection could not be established before */
/* the timer expired, the connection attempt failed */
connection_timeout_msg.type = MSG_TYPE_CONNECTION_TIMEOUT;
xtimer_set_msg(&connection_timeout_timer, GNRC_TCP_CONNECTION_TIMEOUT_DURATION,
&connection_timeout_msg, tcb->owner);
}
/* Call FSM with Event: CALL_OPEN */
ret = _fsm(tcb, GNRC_TCP_FSM_EVENT_CALL_OPEN, NULL, NULL, 0);
if (ret == -ENOMEM) {
DEBUG("gnrc_tcp.c : gnrc_tcp_connect() : Out of receive buffers.\n");
} else if(ret == -EADDRINUSE) {
DEBUG("gnrc_tcp.c : gnrc_tcp_connect() : local_port is already in use.\n");
}
/* Wait until a connection was established or closed */
while (ret >= 0 && tcb->state != GNRC_TCP_FSM_STATE_CLOSED
&& tcb->state != GNRC_TCP_FSM_STATE_ESTABLISHED
&& tcb->state != GNRC_TCP_FSM_STATE_CLOSE_WAIT
) {
msg_receive(&msg);
switch (msg.type) {
case MSG_TYPE_CONNECTION_TIMEOUT:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : CONNECTION_TIMEOUT\n");
_fsm(tcb, GNRC_TCP_FSM_EVENT_TIMEOUT_CONNECTION, NULL, NULL, 0);
ret = -ETIMEDOUT;
break;
case MSG_TYPE_NOTIFY_USER:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : MSG_TYPE_NOTIFY_USER\n");
break;
default:
DEBUG("gnrc_tcp.c : _gnrc_tcp_open() : other message type\n");
}
}
/* Cleanup */
xtimer_remove(&connection_timeout_timer);
if (tcb->state == GNRC_TCP_FSM_STATE_CLOSED && ret == 0) {
ret = -ECONNREFUSED;
}
tcb->owner = KERNEL_PID_UNDEF;
mutex_unlock(&(tcb->function_lock));
return ret;
}
/* External GNRC_TCP API */
int gnrc_tcp_init(void)
{
/* Guard: Check if thread is already running */
if (_gnrc_tcp_pid != KERNEL_PID_UNDEF) {
return -1;