mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-22 10:30:13 +00:00
366 lines
9.7 KiB
C
366 lines
9.7 KiB
C
/*
|
|
* Copyright (c) 2012-2014, Thingsquare, http://www.thingsquare.com/.
|
|
* 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. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``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
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS 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.
|
|
*
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "contiki-net.h"
|
|
|
|
#include "lib/list.h"
|
|
|
|
#include "tcp-socket.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#define MIN(a, b) ((a) < (b) ? (a) : (b))
|
|
|
|
LIST(socketlist);
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS(tcp_socket_process, "TCP socket process");
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
call_event(struct tcp_socket *s, tcp_socket_event_t event)
|
|
{
|
|
if(s != NULL && s->event_callback != NULL) {
|
|
s->event_callback(s, s->ptr, event);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
senddata(struct tcp_socket *s)
|
|
{
|
|
int len;
|
|
|
|
if(s->output_data_len > 0) {
|
|
len = MIN(s->output_data_len, uip_mss());
|
|
s->output_data_send_nxt = len;
|
|
uip_send(s->output_data_ptr, len);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
acked(struct tcp_socket *s)
|
|
{
|
|
if(s->output_data_len > 0) {
|
|
/* Copy the data in the outputbuf down and update outputbufptr and
|
|
outputbuf_lastsent */
|
|
|
|
if(s->output_data_send_nxt > 0) {
|
|
memcpy(&s->output_data_ptr[0],
|
|
&s->output_data_ptr[s->output_data_send_nxt],
|
|
s->output_data_maxlen - s->output_data_send_nxt);
|
|
}
|
|
if(s->output_data_len < s->output_data_send_nxt) {
|
|
printf("tcp: acked assertion failed s->output_data_len (%d) < s->output_data_send_nxt (%d)\n",
|
|
s->output_data_len,
|
|
s->output_data_send_nxt);
|
|
}
|
|
s->output_data_len -= s->output_data_send_nxt;
|
|
s->output_data_send_nxt = 0;
|
|
|
|
call_event(s, TCP_SOCKET_DATA_SENT);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
newdata(struct tcp_socket *s)
|
|
{
|
|
uint16_t len, copylen, bytesleft;
|
|
uint8_t *dataptr;
|
|
len = uip_datalen();
|
|
dataptr = uip_appdata;
|
|
|
|
/* We have a segment with data coming in. We copy as much data as
|
|
possible into the input buffer and call the input callback
|
|
function. The input callback returns the number of bytes that
|
|
should be retained in the buffer, or zero if all data should be
|
|
consumed. If there is data to be retained, the highest bytes of
|
|
data are copied down into the input buffer. */
|
|
do {
|
|
copylen = MIN(len, s->input_data_maxlen);
|
|
memcpy(s->input_data_ptr, dataptr, copylen);
|
|
if(s->input_callback) {
|
|
bytesleft = s->input_callback(s, s->ptr,
|
|
s->input_data_ptr, copylen);
|
|
} else {
|
|
bytesleft = 0;
|
|
}
|
|
if(bytesleft > 0) {
|
|
printf("tcp: newdata, bytesleft > 0 (%d) not implemented\n", bytesleft);
|
|
}
|
|
dataptr += copylen;
|
|
len -= copylen;
|
|
|
|
} while(len > 0);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
relisten(struct tcp_socket *s)
|
|
{
|
|
if(s != NULL && s->listen_port != 0) {
|
|
s->flags |= TCP_SOCKET_FLAGS_LISTENING;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
appcall(void *state)
|
|
{
|
|
struct tcp_socket *s = state;
|
|
|
|
if(uip_connected()) {
|
|
/* Check if this connection originated in a local listen
|
|
socket. We do this by checking the state pointer - if NULL,
|
|
this is an incoming listen connection. If so, we need to
|
|
connect the socket to the uip_conn and call the event
|
|
function. */
|
|
if(s == NULL) {
|
|
for(s = list_head(socketlist);
|
|
s != NULL;
|
|
s = list_item_next(s)) {
|
|
if((s->flags & TCP_SOCKET_FLAGS_LISTENING) != 0 &&
|
|
s->listen_port != 0 &&
|
|
s->listen_port == uip_htons(uip_conn->lport)) {
|
|
s->flags &= ~TCP_SOCKET_FLAGS_LISTENING;
|
|
tcp_markconn(uip_conn, s);
|
|
call_event(s, TCP_SOCKET_CONNECTED);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
call_event(s, TCP_SOCKET_CONNECTED);
|
|
}
|
|
|
|
if(s == NULL) {
|
|
uip_abort();
|
|
} else {
|
|
if(uip_newdata()) {
|
|
newdata(s);
|
|
}
|
|
senddata(s);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if(uip_timedout()) {
|
|
call_event(s, TCP_SOCKET_TIMEDOUT);
|
|
relisten(s);
|
|
}
|
|
|
|
if(uip_aborted()) {
|
|
call_event(s, TCP_SOCKET_ABORTED);
|
|
relisten(s);
|
|
}
|
|
|
|
if(s == NULL) {
|
|
uip_abort();
|
|
return;
|
|
}
|
|
|
|
if(uip_acked()) {
|
|
acked(s);
|
|
}
|
|
if(uip_newdata()) {
|
|
newdata(s);
|
|
}
|
|
|
|
if(uip_rexmit() ||
|
|
uip_newdata() ||
|
|
uip_acked()) {
|
|
senddata(s);
|
|
} else if(uip_poll()) {
|
|
senddata(s);
|
|
}
|
|
|
|
if(s->output_data_len == 0 && s->flags & TCP_SOCKET_FLAGS_CLOSING) {
|
|
s->flags &= ~TCP_SOCKET_FLAGS_CLOSING;
|
|
uip_close();
|
|
tcp_markconn(uip_conn, NULL);
|
|
call_event(s, TCP_SOCKET_CLOSED);
|
|
relisten(s);
|
|
}
|
|
|
|
if(uip_closed()) {
|
|
tcp_markconn(uip_conn, NULL);
|
|
call_event(s, TCP_SOCKET_CLOSED);
|
|
relisten(s);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(tcp_socket_process, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
while(1) {
|
|
PROCESS_WAIT_EVENT();
|
|
|
|
if(ev == tcpip_event) {
|
|
appcall(data);
|
|
}
|
|
}
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
init(void)
|
|
{
|
|
static uint8_t inited = 0;
|
|
if(!inited) {
|
|
list_init(socketlist);
|
|
process_start(&tcp_socket_process, NULL);
|
|
inited = 1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_register(struct tcp_socket *s, void *ptr,
|
|
uint8_t *input_databuf, int input_databuf_len,
|
|
uint8_t *output_databuf, int output_databuf_len,
|
|
tcp_socket_data_callback_t input_callback,
|
|
tcp_socket_event_callback_t event_callback)
|
|
{
|
|
|
|
init();
|
|
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
s->ptr = ptr;
|
|
s->input_data_ptr = input_databuf;
|
|
s->input_data_maxlen = input_databuf_len;
|
|
s->output_data_ptr = output_databuf;
|
|
s->output_data_maxlen = output_databuf_len;
|
|
s->input_callback = input_callback;
|
|
s->event_callback = event_callback;
|
|
list_add(socketlist, s);
|
|
|
|
s->listen_port = 0;
|
|
s->flags = TCP_SOCKET_FLAGS_NONE;
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_connect(struct tcp_socket *s,
|
|
uip_ipaddr_t *ipaddr,
|
|
uint16_t port)
|
|
{
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
PROCESS_CONTEXT_BEGIN(&tcp_socket_process);
|
|
s->c = tcp_connect(ipaddr, uip_htons(port), s);
|
|
PROCESS_CONTEXT_END();
|
|
if(s->c == NULL) {
|
|
return -1;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_listen(struct tcp_socket *s,
|
|
uint16_t port)
|
|
{
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
s->listen_port = port;
|
|
PROCESS_CONTEXT_BEGIN(&tcp_socket_process);
|
|
tcp_listen(uip_htons(port));
|
|
PROCESS_CONTEXT_END();
|
|
s->flags |= TCP_SOCKET_FLAGS_LISTENING;
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_unlisten(struct tcp_socket *s)
|
|
{
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
PROCESS_CONTEXT_BEGIN(&tcp_socket_process);
|
|
tcp_unlisten(uip_htons(s->listen_port));
|
|
PROCESS_CONTEXT_END();
|
|
s->listen_port = 0;
|
|
s->flags &= ~TCP_SOCKET_FLAGS_LISTENING;
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_send(struct tcp_socket *s,
|
|
const uint8_t *data, int datalen)
|
|
{
|
|
int len;
|
|
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
len = MIN(datalen, s->output_data_maxlen - s->output_data_len);
|
|
|
|
memcpy(&s->output_data_ptr[s->output_data_len], data, len);
|
|
s->output_data_len += len;
|
|
return len;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_send_str(struct tcp_socket *s,
|
|
const char *str)
|
|
{
|
|
return tcp_socket_send(s, (const uint8_t *)str, strlen(str));
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_close(struct tcp_socket *s)
|
|
{
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
s->flags |= TCP_SOCKET_FLAGS_CLOSING;
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
tcp_socket_unregister(struct tcp_socket *s)
|
|
{
|
|
if(s == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
tcp_socket_unlisten(s);
|
|
if(s->c != NULL) {
|
|
tcp_attach(s->c, NULL);
|
|
}
|
|
list_remove(socketlist, s);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|