683 lines
20 KiB
C
683 lines
20 KiB
C
/*
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* Copyright (c) 2013, Thingsquare, http://www.thingsquare.com/.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "contiki-net.h"
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#include "ip64-addr.h"
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#include "http-socket.h"
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#include <ctype.h>
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#include <stdio.h>
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#define MAX_PATHLEN 80
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#define MAX_HOSTLEN 40
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PROCESS(http_socket_process, "HTTP socket process");
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LIST(socketlist);
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static void removesocket(struct http_socket *s);
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/*---------------------------------------------------------------------------*/
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static void
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call_callback(struct http_socket *s, http_socket_event_t e,
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const uint8_t *data, uint16_t datalen)
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{
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if(s->callback != NULL) {
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s->callback(s, s->callbackptr, e,
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data, datalen);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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parse_header_init(struct http_socket *s)
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{
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PT_INIT(&s->headerpt);
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}
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/*---------------------------------------------------------------------------*/
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static int
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parse_header_byte(struct http_socket *s, char c)
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{
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PT_BEGIN(&s->headerpt);
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memset(&s->header, -1, sizeof(s->header));
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/* Skip the HTTP response */
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while(c != ' ') {
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PT_YIELD(&s->headerpt);
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}
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/* Skip the space */
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PT_YIELD(&s->headerpt);
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/* Read three characters of HTTP status and convert to BCD */
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s->header.status_code = 0;
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for(s->header_chars = 0; s->header_chars < 3; s->header_chars++) {
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s->header.status_code = s->header.status_code << 4 | (c - '0');
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PT_YIELD(&s->headerpt);
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}
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if(s->header.status_code == 0x200 || s->header.status_code == 0x206) {
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/* Read headers until data */
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while(1) {
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/* Skip characters until end of line */
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do {
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while(c != '\r') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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} while(c != '\n');
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s->header_chars--;
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PT_YIELD(&s->headerpt);
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if(s->header_chars == 0) {
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/* This was an empty line, i.e. the end of headers */
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break;
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}
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/* Start of line */
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s->header_chars = 0;
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/* Read header field */
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while(c != ' ' && c != '\t' && c != ':' && c != '\r' &&
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s->header_chars < sizeof(s->header_field) - 1) {
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s->header_field[s->header_chars++] = c;
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PT_YIELD(&s->headerpt);
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}
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s->header_field[s->header_chars] = '\0';
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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if(c == ':') {
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/* Skip the colon */
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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if(!strcmp(s->header_field, "Content-Length")) {
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s->header.content_length = 0;
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while(isdigit((int)c)) {
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s->header.content_length = s->header.content_length * 10 + c - '0';
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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} else if(!strcmp(s->header_field, "Content-Range")) {
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/* Skip the bytes-unit token */
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while(c != ' ' && c != '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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s->header.content_range.first_byte_pos = 0;
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while(isdigit((int)c)) {
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s->header.content_range.first_byte_pos =
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s->header.content_range.first_byte_pos * 10 + c - '0';
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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if(c == '-') {
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/* Skip the dash */
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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s->header.content_range.last_byte_pos = 0;
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while(isdigit((int)c)) {
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s->header.content_range.last_byte_pos =
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s->header.content_range.last_byte_pos * 10 + c - '0';
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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if(c == '/') {
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/* Skip the slash */
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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/* Skip linear white spaces */
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while(c == ' ' || c == '\t') {
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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if(c != '*') {
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s->header.content_range.instance_length = 0;
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while(isdigit((int)c)) {
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s->header.content_range.instance_length =
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s->header.content_range.instance_length * 10 + c - '0';
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s->header_chars++;
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PT_YIELD(&s->headerpt);
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}
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}
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}
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}
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}
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}
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}
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/* All headers read, now read data */
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call_callback(s, HTTP_SOCKET_HEADER, (void *)&s->header, sizeof(s->header));
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/* Should exit the pt here to indicate that all headers have been
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read */
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PT_EXIT(&s->headerpt);
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} else {
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if(s->header.status_code == 0x404) {
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printf("File not found\n");
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} else if(s->header.status_code == 0x301 || s->header.status_code == 0x302) {
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printf("File moved (not handled)\n");
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}
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call_callback(s, HTTP_SOCKET_ERR, (void *)&s->header, sizeof(s->header));
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tcp_socket_close(&s->s);
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removesocket(s);
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PT_EXIT(&s->headerpt);
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}
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PT_END(&s->headerpt);
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}
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/*---------------------------------------------------------------------------*/
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static int
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input_pt(struct http_socket *s,
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const uint8_t *inputptr, int inputdatalen)
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{
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int i;
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PT_BEGIN(&s->pt);
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/* Parse the header */
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s->header_received = 0;
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do {
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for(i = 0; i < inputdatalen; i++) {
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if(!PT_SCHEDULE(parse_header_byte(s, inputptr[i]))) {
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s->header_received = 1;
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break;
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}
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}
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inputdatalen -= i;
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inputptr += i;
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if(s->header_received == 0) {
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/* If we have not yet received the full header, we wait for the
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next packet to arrive. */
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PT_YIELD(&s->pt);
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}
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} while(s->header_received == 0);
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s->bodylen = 0;
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do {
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/* Receive the data */
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call_callback(s, HTTP_SOCKET_DATA, inputptr, inputdatalen);
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/* Close the connection if the expected content length has been received */
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if(s->header.content_length >= 0 && s->bodylen < s->header.content_length) {
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s->bodylen += inputdatalen;
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if(s->bodylen >= s->header.content_length) {
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tcp_socket_close(&s->s);
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}
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}
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PT_YIELD(&s->pt);
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} while(inputdatalen > 0);
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PT_END(&s->pt);
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}
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/*---------------------------------------------------------------------------*/
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static void
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start_timeout_timer(struct http_socket *s)
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{
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PROCESS_CONTEXT_BEGIN(&http_socket_process);
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etimer_set(&s->timeout_timer, HTTP_SOCKET_TIMEOUT);
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PROCESS_CONTEXT_END(&http_socket_process);
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s->timeout_timer_started = 1;
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}
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/*---------------------------------------------------------------------------*/
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static int
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input(struct tcp_socket *tcps, void *ptr,
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const uint8_t *inputptr, int inputdatalen)
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{
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struct http_socket *s = ptr;
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input_pt(s, inputptr, inputdatalen);
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start_timeout_timer(s);
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return 0; /* all data consumed */
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}
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/*---------------------------------------------------------------------------*/
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static int
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parse_url(const char *url, char *host, uint16_t *portptr, char *path)
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{
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const char *urlptr;
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int i;
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const char *file;
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uint16_t port;
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if(url == NULL) {
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printf("null url\n");
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return 0;
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}
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/* Don't even try to go further if the URL is empty. */
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if(strlen(url) == 0) {
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printf("empty url\n");
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return 0;
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}
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/* See if the URL starts with http:// and remove it. Otherwise, we
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assume it is an implicit http://. */
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if(strncmp(url, "http://", strlen("http://")) == 0) {
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urlptr = url + strlen("http://");
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} else {
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urlptr = url;
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}
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/* Find host part of the URL. */
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if(*urlptr == '[') {
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/* Handle IPv6 addresses - scan for matching ']' */
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urlptr++;
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for(i = 0; i < MAX_HOSTLEN; ++i) {
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if(*urlptr == ']') {
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if(host != NULL) {
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host[i] = 0;
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}
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break;
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}
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if(host != NULL) {
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host[i] = *urlptr;
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}
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++urlptr;
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}
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} else {
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for(i = 0; i < MAX_HOSTLEN; ++i) {
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if(*urlptr == 0 ||
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*urlptr == '/' ||
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*urlptr == ' ' ||
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*urlptr == ':') {
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if(host != NULL) {
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host[i] = 0;
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}
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break;
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}
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if(host != NULL) {
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host[i] = *urlptr;
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}
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++urlptr;
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}
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}
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/* Find the port. Default is 80. */
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port = 80;
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if(*urlptr == ':') {
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port = 0;
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do {
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++urlptr;
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if(*urlptr >= '0' && *urlptr <= '9') {
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port = (10 * port) + (*urlptr - '0');
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}
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} while(*urlptr >= '0' &&
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*urlptr <= '9');
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}
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if(portptr != NULL) {
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*portptr = port;
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}
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/* Find file part of the URL. */
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while(*urlptr != '/' && *urlptr != 0) {
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++urlptr;
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}
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if(*urlptr == '/') {
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file = urlptr;
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} else {
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file = "/";
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}
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if(path != NULL) {
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strncpy(path, file, MAX_PATHLEN);
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}
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static void
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removesocket(struct http_socket *s)
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{
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etimer_stop(&s->timeout_timer);
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s->timeout_timer_started = 0;
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list_remove(socketlist, s);
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}
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/*---------------------------------------------------------------------------*/
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static void
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event(struct tcp_socket *tcps, void *ptr,
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tcp_socket_event_t e)
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{
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struct http_socket *s = ptr;
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char host[MAX_HOSTLEN];
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char path[MAX_PATHLEN];
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uint16_t port;
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char str[42];
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int len;
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if(e == TCP_SOCKET_CONNECTED) {
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printf("Connected\n");
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if(parse_url(s->url, host, &port, path)) {
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tcp_socket_send_str(tcps, s->postdata != NULL ? "POST " : "GET ");
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if(s->proxy_port != 0) {
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/* If we are configured to route through a proxy, we should
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provide the full URL as the path. */
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tcp_socket_send_str(tcps, s->url);
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} else {
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tcp_socket_send_str(tcps, path);
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}
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tcp_socket_send_str(tcps, " HTTP/1.1\r\n");
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tcp_socket_send_str(tcps, "Connection: close\r\n");
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tcp_socket_send_str(tcps, "Host: ");
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tcp_socket_send_str(tcps, host);
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tcp_socket_send_str(tcps, "\r\n");
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if(s->postdata != NULL) {
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if(s->content_type) {
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tcp_socket_send_str(tcps, "Content-Type: ");
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tcp_socket_send_str(tcps, s->content_type);
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tcp_socket_send_str(tcps, "\r\n");
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}
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tcp_socket_send_str(tcps, "Content-Length: ");
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sprintf(str, "%u", s->postdatalen);
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tcp_socket_send_str(tcps, str);
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tcp_socket_send_str(tcps, "\r\n");
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} else if(s->length || s->pos > 0) {
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tcp_socket_send_str(tcps, "Range: bytes=");
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if(s->length) {
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if(s->pos >= 0) {
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sprintf(str, "%llu-%llu", s->pos, s->pos + s->length - 1);
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} else {
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sprintf(str, "-%llu", s->length);
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}
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} else {
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sprintf(str, "%llu-", s->pos);
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}
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tcp_socket_send_str(tcps, str);
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tcp_socket_send_str(tcps, "\r\n");
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}
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tcp_socket_send_str(tcps, "\r\n");
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if(s->postdata != NULL && s->postdatalen) {
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len = tcp_socket_send(tcps, s->postdata, s->postdatalen);
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s->postdata += len;
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s->postdatalen -= len;
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}
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}
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parse_header_init(s);
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} else if(e == TCP_SOCKET_CLOSED) {
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call_callback(s, HTTP_SOCKET_CLOSED, NULL, 0);
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removesocket(s);
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printf("Closed\n");
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} else if(e == TCP_SOCKET_TIMEDOUT) {
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call_callback(s, HTTP_SOCKET_TIMEDOUT, NULL, 0);
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removesocket(s);
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printf("Timedout\n");
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} else if(e == TCP_SOCKET_ABORTED) {
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call_callback(s, HTTP_SOCKET_ABORTED, NULL, 0);
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removesocket(s);
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printf("Aborted\n");
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} else if(e == TCP_SOCKET_DATA_SENT) {
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if(s->postdata != NULL && s->postdatalen) {
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len = tcp_socket_send(tcps, s->postdata, s->postdatalen);
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s->postdata += len;
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s->postdatalen -= len;
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} else {
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start_timeout_timer(s);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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start_request(struct http_socket *s)
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{
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uip_ip4addr_t ip4addr;
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uip_ip6addr_t ip6addr;
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uip_ip6addr_t *addr;
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char host[MAX_HOSTLEN];
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char path[MAX_PATHLEN];
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uint16_t port;
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int ret;
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if(parse_url(s->url, host, &port, path)) {
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printf("url %s host %s port %d path %s\n",
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s->url, host, port, path);
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/* Check if we are to route the request through a proxy. */
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if(s->proxy_port != 0) {
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/* The proxy address should be an IPv6 address. */
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uip_ipaddr_copy(&ip6addr, &s->proxy_addr);
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port = s->proxy_port;
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} else if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
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/* First check if the host is an IP address. */
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if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
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ip64_addr_4to6(&ip4addr, &ip6addr);
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} else {
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/* Try to lookup the hostname. If it fails, we initiate a hostname
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lookup. */
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ret = resolv_lookup(host, &addr);
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if(ret == RESOLV_STATUS_UNCACHED ||
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ret == RESOLV_STATUS_EXPIRED) {
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resolv_query(host);
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puts("Resolving host...");
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return HTTP_SOCKET_OK;
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}
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if(addr != NULL) {
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s->did_tcp_connect = 1;
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tcp_socket_connect(&s->s, addr, port);
|
|
return HTTP_SOCKET_OK;
|
|
} else {
|
|
return HTTP_SOCKET_ERR;
|
|
}
|
|
}
|
|
}
|
|
tcp_socket_connect(&s->s, &ip6addr, port);
|
|
return HTTP_SOCKET_OK;
|
|
} else {
|
|
return HTTP_SOCKET_ERR;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(http_socket_process, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
|
|
while(1) {
|
|
|
|
PROCESS_WAIT_EVENT();
|
|
|
|
if(ev == resolv_event_found && data != NULL) {
|
|
struct http_socket *s;
|
|
const char *name = data;
|
|
/* Either found a hostname, or not. We need to go through the
|
|
list of http sockets and figure out to which connection this
|
|
reply corresponds, then either restart the HTTP get, or kill
|
|
it (if no hostname was found). */
|
|
for(s = list_head(socketlist);
|
|
s != NULL;
|
|
s = list_item_next(s)) {
|
|
char host[MAX_HOSTLEN];
|
|
if(s->did_tcp_connect) {
|
|
/* We already connected, ignored */
|
|
} else if(parse_url(s->url, host, NULL, NULL) &&
|
|
strcmp(name, host) == 0) {
|
|
if(resolv_lookup(name, NULL) == RESOLV_STATUS_CACHED) {
|
|
/* Hostname found, restart get. */
|
|
start_request(s);
|
|
} else {
|
|
/* Hostname not found, kill connection. */
|
|
call_callback(s, HTTP_SOCKET_HOSTNAME_NOT_FOUND, NULL, 0);
|
|
removesocket(s);
|
|
}
|
|
}
|
|
}
|
|
} else if(ev == PROCESS_EVENT_TIMER) {
|
|
struct http_socket *s;
|
|
struct etimer *timeout_timer = data;
|
|
/*
|
|
* A socket time-out has occurred. We need to go through the list of HTTP
|
|
* sockets and figure out to which socket this timer event corresponds,
|
|
* then close this socket.
|
|
*/
|
|
for(s = list_head(socketlist);
|
|
s != NULL;
|
|
s = list_item_next(s)) {
|
|
if(timeout_timer == &s->timeout_timer && s->timeout_timer_started) {
|
|
tcp_socket_close(&s->s);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
init(void)
|
|
{
|
|
static uint8_t inited = 0;
|
|
if(inited == 0) {
|
|
process_start(&http_socket_process, NULL);
|
|
list_init(socketlist);
|
|
inited = 1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
http_socket_init(struct http_socket *s)
|
|
{
|
|
init();
|
|
uip_create_unspecified(&s->proxy_addr);
|
|
s->proxy_port = 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
initialize_socket(struct http_socket *s)
|
|
{
|
|
s->pos = 0;
|
|
s->length = 0;
|
|
s->postdata = NULL;
|
|
s->postdatalen = 0;
|
|
s->timeout_timer_started = 0;
|
|
PT_INIT(&s->pt);
|
|
tcp_socket_register(&s->s, s,
|
|
s->inputbuf, sizeof(s->inputbuf),
|
|
s->outputbuf, sizeof(s->outputbuf),
|
|
input, event);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
http_socket_get(struct http_socket *s,
|
|
const char *url,
|
|
int64_t pos,
|
|
uint64_t length,
|
|
http_socket_callback_t callback,
|
|
void *callbackptr)
|
|
{
|
|
initialize_socket(s);
|
|
strncpy(s->url, url, sizeof(s->url));
|
|
s->pos = pos;
|
|
s->length = length;
|
|
s->callback = callback;
|
|
s->callbackptr = callbackptr;
|
|
|
|
s->did_tcp_connect = 0;
|
|
|
|
list_add(socketlist, s);
|
|
|
|
return start_request(s);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
http_socket_post(struct http_socket *s,
|
|
const char *url,
|
|
const void *postdata,
|
|
uint16_t postdatalen,
|
|
const char *content_type,
|
|
http_socket_callback_t callback,
|
|
void *callbackptr)
|
|
{
|
|
initialize_socket(s);
|
|
strncpy(s->url, url, sizeof(s->url));
|
|
s->postdata = postdata;
|
|
s->postdatalen = postdatalen;
|
|
s->content_type = content_type;
|
|
|
|
s->callback = callback;
|
|
s->callbackptr = callbackptr;
|
|
|
|
s->did_tcp_connect = 0;
|
|
|
|
list_add(socketlist, s);
|
|
|
|
return start_request(s);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
http_socket_close(struct http_socket *socket)
|
|
{
|
|
struct http_socket *s;
|
|
for(s = list_head(socketlist);
|
|
s != NULL;
|
|
s = list_item_next(s)) {
|
|
if(s == socket) {
|
|
tcp_socket_close(&s->s);
|
|
removesocket(s);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
http_socket_set_proxy(struct http_socket *s,
|
|
const uip_ipaddr_t *addr, uint16_t port)
|
|
{
|
|
uip_ipaddr_copy(&s->proxy_addr, addr);
|
|
s->proxy_port = port;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|