285 lines
8.3 KiB
C
285 lines
8.3 KiB
C
/*
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* Copyright (c) 2004, Adam Dunkels.
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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 Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include <stdio.h>
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#ifndef HAVE_SNPRINTF
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int snprintf(char *str, size_t size, const char *format, ...);
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#endif /* HAVE_SNPRINTF */
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#include <string.h>
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#include "contiki-net.h"
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#include "webserver.h"
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#include "cfs/cfs.h"
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#include "lib/petsciiconv.h"
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#include "http-strings.h"
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#include "urlconv.h"
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#include "httpd-cfs.h"
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#ifndef WEBSERVER_CONF_CFS_CONNS
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#define CONNS UIP_CONNS
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#else /* WEBSERVER_CONF_CFS_CONNS */
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#define CONNS WEBSERVER_CONF_CFS_CONNS
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#endif /* WEBSERVER_CONF_CFS_CONNS */
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#ifndef WEBSERVER_CONF_CFS_URLCONV
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#define URLCONV 1
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#else /* WEBSERVER_CONF_CFS_URLCONV */
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#define URLCONV WEBSERVER_CONF_CFS_URLCONV
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#endif /* WEBSERVER_CONF_CFS_URLCONV */
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#define STATE_WAITING 0
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#define STATE_OUTPUT 1
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#define SEND_STRING(s, str) PSOCK_SEND(s, (uint8_t *)str, strlen(str))
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MEMB(conns, struct httpd_state, CONNS);
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#define ISO_nl 0x0a
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#define ISO_space 0x20
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#define ISO_period 0x2e
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#define ISO_slash 0x2f
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(send_file(struct httpd_state *s))
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{
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PSOCK_BEGIN(&s->sout);
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do {
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/* Read data from file system into buffer */
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s->len = cfs_read(s->fd, s->outputbuf, sizeof(s->outputbuf));
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/* If there is data in the buffer, send it */
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if(s->len > 0) {
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PSOCK_SEND(&s->sout, (uint8_t *)s->outputbuf, s->len);
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} else {
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break;
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}
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} while(s->len > 0);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(send_string(struct httpd_state *s, const char *str))
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{
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, str);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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static const char *
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get_content_type(const char *filename)
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{
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const char *ptr;
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ptr = strrchr(filename, ISO_period);
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if(ptr == NULL) {
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ptr = http_content_type_plain;
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} else if(strcmp(http_htm, ptr) == 0) {
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ptr = http_content_type_html;
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} else if(strcmp(http_css, ptr) == 0) {
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ptr = http_content_type_css;
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} else if(strcmp(http_png, ptr) == 0) {
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ptr = http_content_type_png;
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} else if(strcmp(http_gif, ptr) == 0) {
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ptr = http_content_type_gif;
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} else if(strcmp(http_jpg, ptr) == 0) {
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ptr = http_content_type_jpg;
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} else {
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ptr = http_content_type_binary;
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}
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return ptr;
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}
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
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{
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PSOCK_BEGIN(&s->sout);
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SEND_STRING(&s->sout, statushdr);
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SEND_STRING(&s->sout, get_content_type(s->filename));
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(handle_output(struct httpd_state *s))
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{
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PT_BEGIN(&s->outputpt);
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petsciiconv_topetscii(s->filename, sizeof(s->filename));
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s->fd = cfs_open(&s->filename[1], CFS_READ);
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petsciiconv_toascii(s->filename, sizeof(s->filename));
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if(s->fd < 0) {
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strcpy(s->filename, "/notfound.htm");
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s->fd = cfs_open(&s->filename[1], CFS_READ);
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petsciiconv_toascii(s->filename, sizeof(s->filename));
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_404));
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if(s->fd < 0) {
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PT_WAIT_THREAD(&s->outputpt,
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send_string(s, "not found"));
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uip_close();
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webserver_log_file(&uip_conn->ripaddr, "404 (no notfound.htm)");
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PT_EXIT(&s->outputpt);
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}
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webserver_log_file(&uip_conn->ripaddr, "404 - notfound.htm");
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} else {
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_200));
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}
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PT_WAIT_THREAD(&s->outputpt, send_file(s));
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cfs_close(s->fd);
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s->fd = -1;
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PSOCK_CLOSE(&s->sout);
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PT_END(&s->outputpt);
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}
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/*---------------------------------------------------------------------------*/
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static
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PT_THREAD(handle_input(struct httpd_state *s))
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{
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PSOCK_BEGIN(&s->sin);
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PSOCK_READTO(&s->sin, ISO_space);
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if(strncmp(s->inputbuf, http_get, 4) != 0) {
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PSOCK_CLOSE_EXIT(&s->sin);
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}
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PSOCK_READTO(&s->sin, ISO_space);
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if(s->inputbuf[0] != ISO_slash) {
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PSOCK_CLOSE_EXIT(&s->sin);
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}
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#if URLCONV
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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urlconv_tofilename(s->filename, s->inputbuf, sizeof(s->filename));
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#else /* URLCONV */
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if(s->inputbuf[1] == ISO_space) {
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strncpy(s->filename, http_index_htm, sizeof(s->filename));
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} else {
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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strncpy(s->filename, s->inputbuf, sizeof(s->filename));
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}
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#endif /* URLCONV */
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petsciiconv_topetscii(s->filename, sizeof(s->filename));
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webserver_log_file(&uip_conn->ripaddr, s->filename);
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petsciiconv_toascii(s->filename, sizeof(s->filename));
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s->state = STATE_OUTPUT;
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while(1) {
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PSOCK_READTO(&s->sin, ISO_nl);
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if(strncmp(s->inputbuf, http_referer, 8) == 0) {
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s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
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petsciiconv_topetscii(s->inputbuf, PSOCK_DATALEN(&s->sin) - 2);
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webserver_log(s->inputbuf);
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}
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}
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PSOCK_END(&s->sin);
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}
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/*---------------------------------------------------------------------------*/
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static void
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handle_connection(struct httpd_state *s)
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{
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handle_input(s);
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if(s->state == STATE_OUTPUT) {
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handle_output(s);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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httpd_appcall(void *state)
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{
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struct httpd_state *s = (struct httpd_state *)state;
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if(uip_closed() || uip_aborted() || uip_timedout()) {
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if(s != NULL) {
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if(s->fd >= 0) {
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cfs_close(s->fd);
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s->fd = -1;
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}
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memb_free(&conns, s);
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}
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} else if(uip_connected()) {
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s = (struct httpd_state *)memb_alloc(&conns);
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if(s == NULL) {
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uip_abort();
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webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
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return;
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}
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tcp_markconn(uip_conn, s);
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PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
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PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
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PT_INIT(&s->outputpt);
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s->fd = -1;
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s->state = STATE_WAITING;
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timer_set(&s->timer, CLOCK_SECOND * 10);
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handle_connection(s);
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} else if(s != NULL) {
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if(uip_poll()) {
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if(timer_expired(&s->timer)) {
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uip_abort();
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if(s->fd >= 0) {
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cfs_close(s->fd);
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s->fd = -1;
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}
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memb_free(&conns, s);
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webserver_log_file(&uip_conn->ripaddr, "reset (timeout)");
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}
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} else {
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timer_restart(&s->timer);
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}
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handle_connection(s);
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} else {
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uip_abort();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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httpd_init(void)
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{
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tcp_listen(UIP_HTONS(80));
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memb_init(&conns);
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#if URLCONV
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urlconv_init();
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#endif /* URLCONV */
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}
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/*---------------------------------------------------------------------------*/
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