415 lines
12 KiB
C
415 lines
12 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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* $Id: httpd.c,v 1.2 2009/06/19 17:11:28 dak664 Exp $
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*/
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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 "httpd-fs.h"
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#include "httpd-cgi.h"
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//#include "lib/petsciiconv.h"
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//#include "http-strings.h"
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#include "httpd.h"
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#ifndef WEBSERVER_CONF_CGI_CONNS
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#define CONNS 4
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#else /* WEBSERVER_CONF_CGI_CONNS */
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#define CONNS WEBSERVER_CONF_CGI_CONNS
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#endif /* WEBSERVER_CONF_CGI_CONNS */
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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, (unsigned int)strlen(str))
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MEMB(conns, struct httpd_state, CONNS);
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#define ISO_tab 0x09
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#define ISO_nl 0x0a
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#define ISO_cr 0x0d
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#define ISO_space 0x20
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#define ISO_bang 0x21
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#define ISO_percent 0x25
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#define ISO_period 0x2e
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#define ISO_slash 0x2f
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#define ISO_colon 0x3a
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/*---------------------------------------------------------------------------*/
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static unsigned short
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generate(void *state)
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{
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struct httpd_state *s = (struct httpd_state *)state;
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if(s->file.len > uip_mss()) {
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s->len = uip_mss();
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} else {
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s->len = s->file.len;
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}
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httpd_fs_cpy(uip_appdata, s->file.data, s->len);
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return s->len;
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}
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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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PSOCK_GENERATOR_SEND(&s->sout, generate, s);
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s->file.len -= s->len;
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s->file.data += s->len;
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} while(s->file.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_part_of_file(struct httpd_state *s))
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{
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PSOCK_BEGIN(&s->sout);
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static int oldfilelen, oldlen;
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static char * olddata;
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//Store stuff that gets clobbered...
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oldfilelen = s->file.len;
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oldlen = s->len;
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olddata = s->file.data;
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//How much to send
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s->file.len = s->len;
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do {
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PSOCK_GENERATOR_SEND(&s->sout, generate, s);
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s->file.len -= s->len;
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s->file.data += s->len;
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} while(s->file.len > 0);
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s->len = oldlen;
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s->file.len = oldfilelen;
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s->file.data = olddata;
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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static void
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next_scriptstate(struct httpd_state *s)
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{
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char *p;
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if((p = (char *)httpd_fs_strchr(s->scriptptr, ISO_nl)) != NULL) {
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p += 1;
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s->scriptlen -= (unsigned short)(p - s->scriptptr);
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s->scriptptr = p;
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} else {
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s->scriptlen = 0;
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}
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/* char *p;
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p = strchr(s->scriptptr, ISO_nl) + 1;
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s->scriptlen -= (unsigned short)(p - s->scriptptr);
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s->scriptptr = p;*/
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}
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/*---------------------------------------------------------------------------*/
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void
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memcpy_P_trim(char *toram, char *fromflash)
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{
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uint8_t i;
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for (i=0;i<19;) {
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toram[i]=pgm_read_byte_near(fromflash++);
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if (toram[i]==ISO_tab) {if (i) break; else continue;} //skip leading tabs
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if (toram[i]==ISO_space) {if (i) break; else continue;} //skip leading spaces
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if (toram[i]==ISO_nl) break; //nl is preferred delimiter
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if (toram[i]==ISO_cr) break; //some editors insert cr
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if (toram[i]==0) break; //files are terminated with null
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i++;
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}
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toram[i]=0;
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}
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/*---------------------------------------------------------------------------*/
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static char filenamebuf[25],*pptr;//See below!
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static
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PT_THREAD(handle_script(struct httpd_state *s))
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{
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// char *ptr; //one of these gets whomped unless in globals
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// char filenamebuf[25];
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PT_BEGIN(&s->scriptpt);
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while(s->file.len > 0) {
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/* Check if we should start executing a script. */
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if(httpd_fs_getchar(s->file.data) == ISO_percent &&
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httpd_fs_getchar(s->file.data + 1) == ISO_bang) {
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s->scriptptr = s->file.data + 3;
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s->scriptlen = s->file.len - 3;
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memcpy_P_trim(filenamebuf,s->scriptptr);
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if(httpd_fs_getchar(s->scriptptr - 1) == ISO_colon) {
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httpd_fs_open(filenamebuf, &s->file);
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PT_WAIT_THREAD(&s->scriptpt, send_file(s));
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} else {
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PT_WAIT_THREAD(&s->scriptpt,
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httpd_cgi(filenamebuf)(s, s->scriptptr));
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}
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next_scriptstate(s);
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/* The script is over, so we reset the pointers and continue
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sending the rest of the file. */
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s->file.data = s->scriptptr;
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s->file.len = s->scriptlen;
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} else {
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/* See if we find the start of script marker in the block of HTML
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to be sent. */
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if(s->file.len > uip_mss()) {
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s->len = uip_mss();
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} else {
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s->len = s->file.len;
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}
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if(httpd_fs_getchar(s->file.data) == ISO_percent) {
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pptr = (char *) httpd_fs_strchr(s->file.data + 1, ISO_percent);
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} else {
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pptr = (char *) httpd_fs_strchr(s->file.data, ISO_percent);
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}
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if(pptr != NULL && pptr != s->file.data) {
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s->len = (int)(pptr - s->file.data);
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if(s->len >= uip_mss()) {
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s->len = uip_mss();
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}
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}
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PT_WAIT_THREAD(&s->scriptpt, send_part_of_file(s));
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s->file.data += s->len;
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s->file.len -= s->len;
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}
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}
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PT_END(&s->scriptpt);
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}
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/*---------------------------------------------------------------------------*/
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static unsigned short
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generate_status_P(void *pstr)
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{
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uint8_t slen=strlen_P(pstr);
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memcpy_P(uip_appdata, PSTR("HTTP/1.0 "), 9);
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memcpy_P(uip_appdata+9, pstr, slen);
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slen+=9;
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memcpy_P(uip_appdata+slen, PSTR("\r\nServer: Contiki/2.0 http://www.sics.se/contiki/\r\nConnection: close\r\n"), 70);
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return slen+70;
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}
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/*---------------------------------------------------------------------------*/
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static unsigned short
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generate_header_P(void *pstr)
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{
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uint8_t slen=strlen_P(pstr);
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memcpy_P(uip_appdata,PSTR("Content-type: "),14);
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memcpy_P(uip_appdata+14, pstr, slen);
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slen+=14;
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memcpy_P(uip_appdata+slen,PSTR("\r\n\r\n"),4);
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return slen+4;
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}
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/*---------------------------------------------------------------------------*/
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char http_htm[10] PROGMEM ="text/html";
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char http_css[ 9] PROGMEM ="text/css";
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char http_png[10] PROGMEM ="image/png";
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char http_gif[10] PROGMEM ="image/gif";
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char http_jpg[11] PROGMEM ="image/jpeg";
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char http_txt[11] PROGMEM ="text/plain";
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char http_shtml[ 6] PROGMEM =".shtml";
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char index_html[12] PROGMEM ="/index.html";
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static
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PT_THREAD(send_headers(struct httpd_state *s, char *statushdr))
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{
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char *ptr;
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PSOCK_BEGIN(&s->sout);
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PSOCK_GENERATOR_SEND(&s->sout,generate_status_P,statushdr);
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ptr = strrchr(s->filename, ISO_period);
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if (pgm_read_byte_near(statushdr)=='4') {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_htm);
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} else if(ptr == NULL) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P,PSTR("application/octet-stream"));
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} else {
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ptr++;
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if(strncmp_P(ptr, &http_htm[5],3)== 0 ||strncmp_P(ptr, &http_shtml[1], 4) == 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_htm );
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} else if(strcmp_P(ptr, &http_css[5]) == 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_css );
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} else if(strcmp_P(ptr, &http_png[6]) == 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_png );
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} else if(strcmp_P(ptr, &http_gif[6])== 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_gif );
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} else if(strcmp_P(ptr, PSTR("jpg")) == 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_jpg );
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} else {
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PSOCK_GENERATOR_SEND(&s->sout, generate_header_P, http_txt);
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}
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}
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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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char *ptr;
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PT_BEGIN(&s->outputpt);
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// strcpy(s->filename,"/index.html"); //for debugging
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if(!httpd_fs_open(s->filename, &s->file)) {
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strcpy_P(s->filename, PSTR("/404.html"));
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httpd_fs_open(s->filename, &s->file);
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PT_WAIT_THREAD(&s->outputpt, send_headers(s, PSTR("404 Not found")));
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PT_WAIT_THREAD(&s->outputpt, send_file(s));
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} else {
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PT_WAIT_THREAD(&s->outputpt, send_headers(s, PSTR("200 OK")));
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ptr = strchr(s->filename, ISO_period);
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if((ptr != NULL && strncmp_P(ptr, http_shtml, 6) == 0) || strcmp_P(s->filename,index_html)==0) {
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PT_INIT(&s->scriptpt);
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PT_WAIT_THREAD(&s->outputpt, handle_script(s));
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} else {
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PT_WAIT_THREAD(&s->outputpt, send_file(s));
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}
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}
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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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char http_get[4] PROGMEM ="GET ";
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char http_ref[8] PROGMEM ="Referer:";
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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_P(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(s->inputbuf[1] == ISO_space) {
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strcpy_P(s->filename, index_html);
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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[0], sizeof(s->filename));
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}
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webserver_log_file(&uip_conn->ripaddr, 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_P(s->inputbuf, http_ref, 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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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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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->state = STATE_WAITING;
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/* timer_set(&s->timer, CLOCK_SECOND * 100);*/
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s->timer = 0;
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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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++s->timer;
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if(s->timer >= 20) {
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uip_abort();
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memb_free(&conns, s);
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}
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} else {
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s->timer = 0;
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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(HTONS(80));
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memb_init(&conns);
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httpd_cgi_init();
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}
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/*---------------------------------------------------------------------------*/
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