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osd-contiki/platform/avr-ravenusb/httpd-simple-avr.c

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/**
* \file
* A simple web server forwarding page generation to a protothread
* \author
* Adam Dunkels <adam@sics.se>
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
* David Kopf <dak664@embarqmail.com> (AVR adaptation)
*/
#include <stdio.h>
#include <string.h>
#include <avr/pgmspace.h>
#include "contiki-net.h"
#ifndef WEBSERVER_CONF_CFS_PATHLEN
#define HTTPD_PATHLEN 2
#else
#define HTTPD_PATHLEN WEBSERVER_CONF_CFS_PATHLEN
#endif
struct httpd_state;
typedef char (* httpd_simple_script_t)(struct httpd_state *s);
struct httpd_state {
struct timer timer;
struct psock sin, sout;
struct pt outputpt;
char inputbuf[HTTPD_PATHLEN + 30];
char outputbuf[UIP_TCP_MSS];
char filename[HTTPD_PATHLEN];
httpd_simple_script_t script;
char state;
};
/* DEBUGLOGIC is a convenient way to debug in a simulator without a tcp/ip connection.
* Break the program in the process loop and step from the entry in httpd_appcall.
* The input file is forced to /index.html and the output directed to uip_aligned_buf.
* If cgi's are invoked define it in httpd-cgi.c as well!
* psock_generator_send in /core/net/psock.c must also be modified as follows:
* ...
* // Wait until all data is sent and acknowledged.
* if (!s->sendlen) break; //<---add this line
* PT_YIELD_UNTIL(&s->psockpt, uip_acked() || uip_rexmit());
* ...
*/
#define DEBUGLOGIC 0
#if DEBUGLOGIC
struct httpd_state *sg;
#define uip_mss(...) sizeof(uip_aligned_buf)
#define uip_appdata (char *) &uip_aligned_buf
#endif
#ifndef WEBSERVER_CONF_CFS_CONNS
#define CONNS UIP_CONNS
#else /* WEBSERVER_CONF_CFS_CONNS */
#define CONNS WEBSERVER_CONF_CFS_CONNS
#endif /* WEBSERVER_CONF_CFS_CONNS */
#ifndef WEBSERVER_CONF_CFS_URLCONV
#define URLCONV 0
#else /* WEBSERVER_CONF_CFS_URLCONV */
#define URLCONV WEBSERVER_CONF_CFS_URLCONV
#endif /* WEBSERVER_CONF_CFS_URLCONV */
#define STATE_WAITING 0
#define STATE_OUTPUT 1
MEMB(conns, struct httpd_state, CONNS);
#define webserver_log_file(...)
#define ISO_nl 0x0a
#define ISO_space 0x20
#define ISO_period 0x2e
#define ISO_slash 0x2f
/*---------------------------------------------------------------------------*/
static unsigned short
generate_string(void *sstr)
{
uint8_t slen=strlen((char *)sstr);
memcpy(uip_appdata, (char *)sstr, slen);
#if DEBUGLOGIC
return 0;
#else
return slen;
#endif
}
/*---------------------------------------------------------------------------*/
static unsigned short
generate_string_P(void *sstr)
{
uint8_t slen=strlen_P((char *)sstr);
memcpy_P(uip_appdata, (char *)sstr, slen);
#if DEBUGLOGIC
return 0;
#else
return slen;
#endif
}
/*---------------------------------------------------------------------------*/
#if FIND_THE_SCRIPT
/* Needed if more than one script is implemented.
* The generate_routes RPL page is hard coded at present
*/
static
PT_THREAD(send_string_P(struct httpd_state *s, char *str))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, str);
PSOCK_END(&s->sout);
}
#endif
/*---------------------------------------------------------------------------*/
const char http_content_type_html[] PROGMEM = "Content-type: text/html\r\n\r\n";
static
PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) statushdr);
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) http_content_type_html);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
const char http_index_html[] PROGMEM = "/index.html";
const char http_referer[] PROGMEM = "Referer:";
const char http_get[] PROGMEM = "GET ";
static
PT_THREAD(handle_input(struct httpd_state *s))
{
PSOCK_BEGIN(&s->sin);
PSOCK_READTO(&s->sin, ISO_space);
if(strncmp_P(s->inputbuf, http_get, 4) != 0) {
PSOCK_CLOSE_EXIT(&s->sin);
}
PSOCK_READTO(&s->sin, ISO_space);
if(s->inputbuf[0] != ISO_slash) {
PSOCK_CLOSE_EXIT(&s->sin);
}
#if URLCONV
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
urlconv_tofilename(s->filename, s->inputbuf, sizeof(s->filename));
#else /* URLCONV */
if(s->inputbuf[1] == ISO_space) {
strncpy_P(s->filename, http_index_html, sizeof(s->filename));
} else {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
strncpy(s->filename, s->inputbuf, sizeof(s->filename));
}
#endif /* URLCONV */
webserver_log_file(&uip_conn->ripaddr, s->filename);
s->state = STATE_OUTPUT;
while(1) {
PSOCK_READTO(&s->sin, ISO_nl);
// if(strncmp_P(s->inputbuf, http_referer, 8) == 0) {
// s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
// webserver_log(s->inputbuf);
// }
}
PSOCK_END(&s->sin);
}
/*---------------------------------------------------------------------------*/
void
httpd_init(void)
{
tcp_listen(UIP_HTONS(80));
memb_init(&conns);
}
/*---------------------------------------------------------------------------*/
/* Only one single web request at time, MSS is 48 to save RAM */
static char buf[48];
static uint8_t blen;
#define ADD(FORMAT,args...) do { \
blen += snprintf_P(&buf[blen], sizeof(buf) - blen, PSTR(FORMAT),##args); \
} while(0)
/*---------------------------------------------------------------------------*/
static void
ipaddr_add(const uip_ipaddr_t *addr)
{
uint16_t a;
int i, f;
for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
a = (addr->u8[i] << 8) + addr->u8[i + 1];
if(a == 0 && f >= 0) {
if(f++ == 0 && sizeof(buf) - blen >= 2) {
buf[blen++] = ':';
buf[blen++] = ':';
}
} else {
if(f > 0) {
f = -1;
} else if(i > 0 && blen < sizeof(buf)) {
buf[blen++] = ':';
}
ADD("%x", a);
}
}
}
/*---------------------------------------------------------------------------*/
const char TOP1[] PROGMEM = "<html><head><title>ContikiRPL(Jackdaw)";
const char TOP2[] PROGMEM = "</title></head><body>";
const char BOTTOM[] PROGMEM = "</body></html>";
static
PT_THREAD(generate_routes(struct httpd_state *s))
{
uint8_t i=0;
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) TOP1);
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) TOP2);
#if NETSTACK_CONF_WITH_IPV6 //allow ip4 builds
blen = 0;
ADD("<h2>Neighbors [%u max]</h2>",NBR_TABLE_CONF_MAX_NEIGHBORS);
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen = 0;
uip_ds6_nbr_t *nbr;
for(nbr = nbr_table_head(ds6_neighbors);
nbr != NULL;
nbr = nbr_table_next(ds6_neighbors, nbr)) {
ipaddr_add(&nbr->ipaddr);
ADD("<br>");
// if(blen > sizeof(buf) - 45) {
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen = 0;
// }
}
ADD("<h2>Routes [%u max]</h2>",UIP_DS6_ROUTE_NB);
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen = 0;
uip_ds6_route_t *route;
for(route = uip_ds6_route_head();
route != NULL;
route = uip_ds6_route_next(route)) {
ipaddr_add(&route->ipaddr);
ADD("/%u (via ", route->length);
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen=0;
ipaddr_add(uip_ds6_route_nexthop(route));
if(route->state.lifetime < 600) {
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen=0;
ADD(") %lus<br>", route->state.lifetime);
} else {
ADD(")<br>");
}
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen = 0;
}
if(blen > 0) {
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
blen = 0;
}
#else /* NETSTACK_CONF_WITH_IPV6 */
blen = 0;i++;
ADD("<h2>Hey, you got ip4 working!</h2>");
PSOCK_GENERATOR_SEND(&s->sout, generate_string, buf);
#endif /* NETSTACK_CONF_WITH_IPV6 */
PSOCK_GENERATOR_SEND(&s->sout, generate_string_P, (char *) BOTTOM);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
return generate_routes;
}
/*---------------------------------------------------------------------------*/
const char http_header_200[] PROGMEM = "HTTP/1.0 200 OK\r\nServer: Jackdaw\r\nConnection: close\r\n";
const char http_header_404[] PROGMEM = "HTTP/1.0 404 Not found\r\nServer: Jackdaw\r\nConnection: close\r\n";
const char NOT_FOUND[] PROGMEM = "<html><body bgcolor=\"white\"><center><h1>404 - file not found</h1></center></body></html>";
static
PT_THREAD(handle_output(struct httpd_state *s))
{
PT_BEGIN(&s->outputpt);
#if DEBUGLOGIC
strcpy_P(s->filename,PSTR("/x"));
#endif
#if FIND_THE_SCRIPT
s->script = httpd_simple_get_script(&s->filename[1]);
if(s->script == NULL) {
printf_P(PSTR("not found!"));
strcpy_P(s->filename, PSTR("/notfound.html"));
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, http_header_404));
PT_WAIT_THREAD(&s->outputpt,
send_string_P(s, NOT_FOUND));
uip_close();
PT_EXIT(&s->outputpt);
} else {
#else
s->script = generate_routes;
if (1) {
#endif
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, http_header_200));
PT_WAIT_THREAD(&s->outputpt, s->script(s));
}
s->script = NULL;
PSOCK_CLOSE(&s->sout);
PT_END(&s->outputpt);
}
/*---------------------------------------------------------------------------*/
static void
handle_connection(struct httpd_state *s)
{
#if DEBUGLOGIC
handle_output(s);
#else
handle_input(s);
if(s->state == STATE_OUTPUT) {
handle_output(s);
}
#endif
}
/*---------------------------------------------------------------------------*/
void
httpd_appcall(void *state)
{
#if DEBUGLOGIC
struct httpd_state *s; //Enter here for debugging with output directed to TCPBUF
s = sg = (struct httpd_state *)memb_alloc(&conns); //put ram watch on sg
if (1) {
#else
struct httpd_state *s = (struct httpd_state *)state;
if(uip_closed() || uip_aborted() || uip_timedout()) {
if(s != NULL) {
s->script = NULL;
memb_free(&conns, s);
}
} else if(uip_connected()) {
s = (struct httpd_state *)memb_alloc(&conns);
if(s == NULL) {
uip_abort();
webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
return;
}
#endif
tcp_markconn(uip_conn, s);
PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PT_INIT(&s->outputpt);
s->script = NULL;
s->state = STATE_WAITING;
timer_set(&s->timer, CLOCK_SECOND * 10);
handle_connection(s);
} else if(s != NULL) {
if(uip_poll()) {
if(timer_expired(&s->timer)) {
uip_abort();
s->script = NULL;
memb_free(&conns, s);
webserver_log_file(&uip_conn->ripaddr, "reset (timeout)");
}
} else {
timer_restart(&s->timer);
}
handle_connection(s);
} else {
uip_abort();
}
}
/*---------------------------------------------------------------------------*/
PROCESS(httpd_process, "httpd");
PROCESS_THREAD(httpd_process, ev, data)
{
PROCESS_BEGIN();
httpd_init();
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
httpd_appcall(data);
}
PROCESS_END();
}
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