432 lines
13 KiB
C
432 lines
13 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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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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*/
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/**
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* \file
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* A simple web server forwarding page generation to a protothread
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* \author
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* Adam Dunkels <adam@sics.se>
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* Niclas Finne <nfi@sics.se>
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* Joakim Eriksson <joakime@sics.se>
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* David Kopf <dak664@embarqmail.com> (AVR adaptation)
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*/
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#include <stdio.h>
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#include <string.h>
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#include <avr/pgmspace.h>
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#include "contiki-net.h"
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#ifndef WEBSERVER_CONF_CFS_PATHLEN
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#define HTTPD_PATHLEN 2
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#else
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#define HTTPD_PATHLEN WEBSERVER_CONF_CFS_PATHLEN
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#endif
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struct httpd_state;
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typedef char (* httpd_simple_script_t)(struct httpd_state *s);
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struct httpd_state {
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struct timer timer;
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struct psock sin, sout;
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struct pt outputpt;
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char inputbuf[HTTPD_PATHLEN + 30];
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char outputbuf[UIP_TCP_MSS];
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char filename[HTTPD_PATHLEN];
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httpd_simple_script_t script;
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char state;
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};
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/* DEBUGLOGIC is a convenient way to debug in a simulator without a tcp/ip connection.
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* Break the program in the process loop and step from the entry in httpd_appcall.
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* The input file is forced to /index.html and the output directed to uip_aligned_buf.
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* If cgi's are invoked define it in httpd-cgi.c as well!
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* psock_generator_send in /core/net/psock.c must also be modified as follows:
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* ...
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* // Wait until all data is sent and acknowledged.
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* if (!s->sendlen) break; //<---add this line
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* PT_YIELD_UNTIL(&s->psockpt, uip_acked() || uip_rexmit());
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* ...
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*/
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#define DEBUGLOGIC 0
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#if DEBUGLOGIC
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struct httpd_state *sg;
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#define uip_mss(...) sizeof(uip_aligned_buf)
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#define uip_appdata (char *) &uip_aligned_buf
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#endif
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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 0
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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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MEMB(conns, struct httpd_state, CONNS);
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#define webserver_log_file(...)
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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 unsigned short
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generate_string(void *sstr)
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{
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uint8_t slen=strlen((char *)sstr);
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memcpy(uip_appdata, (char *)sstr, slen);
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#if DEBUGLOGIC
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return 0;
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#else
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return slen;
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#endif
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}
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/*---------------------------------------------------------------------------*/
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static unsigned short
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generate_string_P(void *sstr)
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{
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uint8_t slen=strlen_P((char *)sstr);
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memcpy_P(uip_appdata, (char *)sstr, slen);
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#if DEBUGLOGIC
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return 0;
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#else
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return slen;
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#endif
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}
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/*---------------------------------------------------------------------------*/
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#if FIND_THE_SCRIPT
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/* Needed if more than one script is implemented.
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* The generate_routes RPL page is hard coded at present
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*/
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static
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PT_THREAD(send_string_P(struct httpd_state *s, char *str))
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{
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PSOCK_BEGIN(&s->sout);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, str);
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PSOCK_END(&s->sout);
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}
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#endif
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/*---------------------------------------------------------------------------*/
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const char http_content_type_html[] PROGMEM = "Content-type: text/html\r\n\r\n";
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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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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) statushdr);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) http_content_type_html);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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const char http_index_html[] PROGMEM = "/index.html";
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const char http_referer[] PROGMEM = "Referer:";
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const char http_get[] PROGMEM = "GET ";
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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 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_P(s->filename, http_index_html, 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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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_referer, 8) == 0) {
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// s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
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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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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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}
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/*---------------------------------------------------------------------------*/
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/* Only one single web request at time, MSS is 48 to save RAM */
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static char buf[48];
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static uint8_t blen;
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#define ADD(FORMAT,args...) do { \
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blen += snprintf_P(&buf[blen], sizeof(buf) - blen, PSTR(FORMAT),##args); \
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} while(0)
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/*---------------------------------------------------------------------------*/
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static void
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ipaddr_add(const uip_ipaddr_t *addr)
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{
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uint16_t a;
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int i, f;
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for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
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a = (addr->u8[i] << 8) + addr->u8[i + 1];
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if(a == 0 && f >= 0) {
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if(f++ == 0 && sizeof(buf) - blen >= 2) {
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buf[blen++] = ':';
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buf[blen++] = ':';
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}
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} else {
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if(f > 0) {
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f = -1;
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} else if(i > 0 && blen < sizeof(buf)) {
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buf[blen++] = ':';
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}
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ADD("%x", a);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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const char TOP1[] PROGMEM = "<html><head><title>ContikiRPL(Jackdaw)";
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const char TOP2[] PROGMEM = "</title></head><body>";
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const char BOTTOM[] PROGMEM = "</body></html>";
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#if UIP_CONF_IPV6
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extern uip_ds6_nbr_t uip_ds6_nbr_cache[];
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extern uip_ds6_route_t uip_ds6_routing_table[];
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#endif
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static
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PT_THREAD(generate_routes(struct httpd_state *s))
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{
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uint8_t i=0;
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PSOCK_BEGIN(&s->sout);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) TOP1);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) TOP2);
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#if UIP_CONF_IPV6 //allow ip4 builds
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blen = 0;
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ADD("<h2>Neighbors [%u max]</h2>",UIP_DS6_NBR_NB);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen = 0;
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for(i = 0; i < UIP_DS6_NBR_NB; i++) {
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if(uip_ds6_nbr_cache[i].isused) {
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ipaddr_add(&uip_ds6_nbr_cache[i].ipaddr);
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ADD("<br>");
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// if(blen > sizeof(buf) - 45) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen = 0;
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// }
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}
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}
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ADD("<h2>Routes [%u max]</h2>",UIP_DS6_ROUTE_NB);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen = 0;
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uip_ds6_route_t *route;
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for(route = uip_ds6_route_list_head(); route != NULL; route = list_item_next(route)) {
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ipaddr_add(&route->ipaddr);
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ADD("/%u (via ", route->length);
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen=0;
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ipaddr_add(&route->nexthop);
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if(route->state.lifetime < 600) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen=0;
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ADD(") %lus<br>", route->state.lifetime);
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} else {
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ADD(")<br>");
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}
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen = 0;
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}
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if(blen > 0) {
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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blen = 0;
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}
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#else /* UIP_CONF_IPV6 */
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blen = 0;i++;
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ADD("<h2>Hey, you got ip4 working!</h2>");
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PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
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#endif /* UIP_CONF_IPV6 */
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PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) BOTTOM);
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PSOCK_END(&s->sout);
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}
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/*---------------------------------------------------------------------------*/
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httpd_simple_script_t
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httpd_simple_get_script(const char *name)
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{
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return generate_routes;
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}
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/*---------------------------------------------------------------------------*/
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const char http_header_200[] PROGMEM = "HTTP/1.0 200 OK\r\nServer: Jackdaw\r\nConnection: close\r\n";
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const char http_header_404[] PROGMEM = "HTTP/1.0 404 Not found\r\nServer: Jackdaw\r\nConnection: close\r\n";
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const char NOT_FOUND[] PROGMEM = "<html><body bgcolor=\"white\"><center><h1>404 - file not found</h1></center></body></html>";
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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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#if DEBUGLOGIC
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strcpy_P(s->filename,PSTR("/x"));
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#endif
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#if FIND_THE_SCRIPT
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s->script = httpd_simple_get_script(&s->filename[1]);
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if(s->script == NULL) {
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printf_P(PSTR("not found!"));
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strcpy_P(s->filename, PSTR("/notfound.html"));
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_404));
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PT_WAIT_THREAD(&s->outputpt,
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send_string_P(s, NOT_FOUND));
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uip_close();
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PT_EXIT(&s->outputpt);
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} else {
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#else
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s->script = generate_routes;
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if (1) {
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#endif
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PT_WAIT_THREAD(&s->outputpt,
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send_headers(s, http_header_200));
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PT_WAIT_THREAD(&s->outputpt, s->script(s));
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}
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s->script = NULL;
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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 void
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handle_connection(struct httpd_state *s)
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{
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#if DEBUGLOGIC
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handle_output(s);
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#else
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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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#endif
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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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#if DEBUGLOGIC
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struct httpd_state *s; //Enter here for debugging with output directed to TCPBUF
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s = sg = (struct httpd_state *)memb_alloc(&conns); //put ram watch on sg
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if (1) {
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#else
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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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s->script = 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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webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
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return;
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}
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#endif
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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->script = NULL;
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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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s->script = NULL;
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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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PROCESS(httpd_process, "httpd");
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PROCESS_THREAD(httpd_process, ev, data)
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{
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PROCESS_BEGIN();
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httpd_init();
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
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httpd_appcall(data);
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}
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PROCESS_END();
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}
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