mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-28 07:28:58 +00:00
functions for converting between host and network byte order. These names are the de facto standard names for this functionality because of the original BSD TCP/IP implementation. But they cause problems for uIP/Contiki: some platforms define these names themselves (Mac OS, most notably), causing compilation problems for Contiki on those platforms. This commit changes all htons to uip_htons instead. Same goes for htonl, ntohs, and ntohl. All-caps versions as well.
286 lines
8.2 KiB
C
286 lines
8.2 KiB
C
/*
|
|
* Copyright (c) 2009, Swedish Institute of Computer Science.
|
|
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* $Id: twitter.c,v 1.3 2010/10/19 18:29:03 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Contiki interface to posting Twitter messages
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "contiki-net.h"
|
|
#include "shell.h"
|
|
|
|
#include "twitter.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#define MAX_USERNAME_PASSWORD 32
|
|
#define MAX_MESSAGE 160
|
|
#define MAX_LENGTH 10
|
|
|
|
struct twitter_state {
|
|
unsigned char timer;
|
|
struct psock sin, sout;
|
|
char lengthstr[MAX_LENGTH];
|
|
char base64_username_password[MAX_USERNAME_PASSWORD];
|
|
char message[MAX_MESSAGE];
|
|
uint8_t inputbuf[UIP_TCP_MSS];
|
|
uip_ipaddr_t addr;
|
|
};
|
|
|
|
struct twitter_state conn;
|
|
|
|
#define DEBUG 0
|
|
#if DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
PROCESS(twitter_process, "Twitter client");
|
|
/*---------------------------------------------------------------------------*/
|
|
static uint8_t
|
|
base64_encode_6bits(uint8_t c)
|
|
{
|
|
if(c <= 25) {
|
|
return c + 'A';
|
|
} else if(c <= 51) {
|
|
return c - 26 + 'a';
|
|
} else if(c <= 61) {
|
|
return c - 52 + '0';
|
|
} else if(c == 62) {
|
|
return '+';
|
|
} else if(c == 63) {
|
|
return '/';
|
|
}
|
|
/* This shouldn't happen because only 6 bits of data should be
|
|
passed to this function. */
|
|
return '=';
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
base64_encode_24bits(const uint8_t inputdata[], char outputdata[], int len)
|
|
{
|
|
switch(len) {
|
|
case 0:
|
|
outputdata[0] = outputdata[1] = outputdata[2] = outputdata[3] = '=';
|
|
break;
|
|
case 1:
|
|
outputdata[0] = base64_encode_6bits((inputdata[0] >> 2) & 0x3f);
|
|
outputdata[1] = base64_encode_6bits((((inputdata[0] << 4) & 0x30)));
|
|
outputdata[2] = outputdata[3] = '=';
|
|
break;
|
|
case 2:
|
|
outputdata[0] = base64_encode_6bits((inputdata[0] >> 2) & 0x3f);
|
|
outputdata[1] = base64_encode_6bits((((inputdata[0] << 4) & 0x30) |
|
|
(inputdata[1] >> 4)) & 0x3f);
|
|
outputdata[2] = base64_encode_6bits((((inputdata[1] << 2) & 0x3f)));
|
|
outputdata[3] = '=';
|
|
break;
|
|
case 3:
|
|
default:
|
|
outputdata[0] = base64_encode_6bits((inputdata[0] >> 2) & 0x3f);
|
|
outputdata[1] = base64_encode_6bits((((inputdata[0] << 4) & 0x30) |
|
|
(inputdata[1] >> 4)) & 0x3f);
|
|
outputdata[2] = base64_encode_6bits((((inputdata[1] << 2) & 0x3c) |
|
|
(inputdata[2] >> 6)) & 0x3f);
|
|
outputdata[3] = base64_encode_6bits((inputdata[2]) & 0x3f);
|
|
break;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
twitter_post(const uint8_t *username_password, const char *msg)
|
|
{
|
|
int len;
|
|
int i, j;
|
|
struct twitter_state *s;
|
|
|
|
process_exit(&twitter_process);
|
|
|
|
/* s = (struct twitter_state *)memb_alloc(&conns);*/
|
|
s = &conn;
|
|
if(s == NULL) {
|
|
PRINTF("Could not allocate memory for the tweet\n");
|
|
return 0;
|
|
}
|
|
PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
|
|
PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
|
|
s->timer = 0;
|
|
|
|
/* dec64 encode username:password pair */
|
|
len = strlen((char *)username_password);
|
|
j = 0;
|
|
for(i = 0; i < len; i += 3) {
|
|
base64_encode_24bits(&username_password[i], &s->base64_username_password[j],
|
|
len - i);
|
|
j += 4;
|
|
}
|
|
s->base64_username_password[j] = 0;
|
|
|
|
/* Copy the status message, and avoid the leading whitespace. */
|
|
strcpy(s->message, "status=");
|
|
strcpy(&s->message[7], msg);
|
|
|
|
/* PRINTF("username_password '%s'\n", s->base64_username_password);
|
|
PRINTF("message '%s'\n", s->message);*/
|
|
|
|
/* Spawn process to deal with TCP connection */
|
|
process_start(&twitter_process, (char *)s);
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
handle_output(struct twitter_state *s)
|
|
{
|
|
PSOCK_BEGIN(&s->sout);
|
|
/* Send POST header */
|
|
|
|
PSOCK_SEND_STR(&s->sout, "POST /statuses/update.json HTTP/1.1\r\n");
|
|
|
|
/* Send Authorization header */
|
|
PSOCK_SEND_STR(&s->sout, "Authorization: Basic ");
|
|
PSOCK_SEND_STR(&s->sout, s->base64_username_password);
|
|
PSOCK_SEND_STR(&s->sout, "\r\n");
|
|
|
|
/* Send Agent header */
|
|
PSOCK_SEND_STR(&s->sout, "User-Agent: Contiki 2.x\r\n");
|
|
PSOCK_SEND_STR(&s->sout, "Host: twitter.com\r\n");
|
|
PSOCK_SEND_STR(&s->sout, "Accept: */*\r\n");
|
|
|
|
/* Send Content length header */
|
|
PSOCK_SEND_STR(&s->sout, "Content-Length: ");
|
|
snprintf(s->lengthstr, sizeof(s->lengthstr), "%d", strlen(s->message));
|
|
PSOCK_SEND_STR(&s->sout, s->lengthstr);
|
|
PSOCK_SEND_STR(&s->sout, "\r\n");
|
|
|
|
/* Send Content type header */
|
|
PSOCK_SEND_STR(&s->sout,
|
|
"Content-Type: application/x-www-form-urlencoded\r\n\r\n");
|
|
|
|
|
|
/* Send status message */
|
|
PSOCK_SEND_STR(&s->sout, s->message);
|
|
|
|
/* Close connection */
|
|
PSOCK_CLOSE(&s->sout);
|
|
PSOCK_EXIT(&s->sout);
|
|
PSOCK_END(&s->sout);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
handle_input(struct twitter_state *s)
|
|
{
|
|
PSOCK_BEGIN(&s->sin);
|
|
|
|
/* We don't care about input data for now */
|
|
|
|
PSOCK_END(&s->sin);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
handle_connection(struct twitter_state *s)
|
|
{
|
|
handle_input(s);
|
|
handle_output(s);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(twitter_process, ev, data)
|
|
{
|
|
struct twitter_state *s = data;
|
|
struct uip_conn *conn;
|
|
|
|
PROCESS_BEGIN();
|
|
|
|
/* Lookup host "twitter.com" */
|
|
|
|
/* XXX for now, just use 128.121.146.228 */
|
|
uip_ipaddr(&s->addr, 128,121,146,228);
|
|
|
|
|
|
/* Open a TCP connection to port 80 on twitter.com */
|
|
conn = tcp_connect(&s->addr, uip_htons(80), s);
|
|
if(conn == NULL) {
|
|
PRINTF("Could not open TCP connection\n");
|
|
/* memb_free(&conns, s);*/
|
|
PROCESS_EXIT();
|
|
}
|
|
|
|
while(1) {
|
|
PROCESS_WAIT_EVENT();
|
|
|
|
if(ev == tcpip_event) {
|
|
struct twitter_state *s = (struct twitter_state *)data;
|
|
|
|
if(uip_closed() || uip_aborted() || uip_timedout()) {
|
|
if(uip_closed()) {
|
|
PRINTF("Connection closed\n");
|
|
} else {
|
|
PRINTF("Connection aborted/timedout\n");
|
|
}
|
|
/* if(s != NULL) {
|
|
memb_free(&conns, s);
|
|
}*/
|
|
PROCESS_EXIT();
|
|
} else if(uip_connected()) {
|
|
handle_connection(s);
|
|
s->timer = 0;
|
|
} else if(s != NULL) {
|
|
if(uip_poll()) {
|
|
++s->timer;
|
|
if(s->timer >= 20) {
|
|
PRINTF("Timed out due to inactivity\n");
|
|
uip_abort();
|
|
PROCESS_EXIT();
|
|
/* memb_free(&conns, s);*/
|
|
}
|
|
} else {
|
|
s->timer = 0;
|
|
}
|
|
handle_connection(s);
|
|
} else {
|
|
PRINTF("Abort because s == NULL\n");
|
|
uip_abort();
|
|
PROCESS_EXIT();
|
|
}
|
|
}
|
|
}
|
|
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|