nes-proj/examples/rpl-border-router/webserver/webserver.c

178 lines
5.3 KiB
C

/*
* Copyright (c) 2017, RISE SICS
* 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.
*
* This file is part of the Contiki operating system.
*
*/
#include "contiki.h"
#include "net/routing/routing.h"
#include "net/ipv6/uip-ds6-route.h"
#include "net/ipv6/uip-sr.h"
#include <stdio.h>
#include <string.h>
/*---------------------------------------------------------------------------*/
static const char *TOP = "<html>\n <head>\n <title>Contiki-NG</title>\n </head>\n<body>\n";
static const char *BOTTOM = "\n</body>\n</html>\n";
static char buf[256];
static int blen;
#define ADD(...) do { \
blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \
} while(0)
#define SEND(s) do { \
SEND_STRING(s, buf); \
blen = 0; \
} while(0);
/* Use simple webserver with only one page for minimum footprint.
* Multiple connections can result in interleaved tcp segments since
* a single static buffer is used for all segments.
*/
#include "httpd-simple.h"
/*---------------------------------------------------------------------------*/
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) {
ADD("::");
}
} else {
if(f > 0) {
f = -1;
} else if(i > 0) {
ADD(":");
}
ADD("%x", a);
}
}
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(generate_routes(struct httpd_state *s))
{
static uip_ds6_nbr_t *nbr;
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, TOP);
ADD(" Neighbors\n <ul>\n");
SEND(&s->sout);
for(nbr = nbr_table_head(ds6_neighbors);
nbr != NULL;
nbr = nbr_table_next(ds6_neighbors, nbr)) {
ADD(" <li>");
ipaddr_add(&nbr->ipaddr);
ADD("</li>\n");
SEND(&s->sout);
}
ADD(" </ul>\n");
SEND(&s->sout);
#if (UIP_MAX_ROUTES != 0)
{
static uip_ds6_route_t *r;
ADD(" Routes\n <ul>\n");
SEND(&s->sout);
for(r = uip_ds6_route_head(); r != NULL; r = uip_ds6_route_next(r)) {
ADD(" <li>");
ipaddr_add(&r->ipaddr);
ADD("/%u (via ", r->length);
ipaddr_add(uip_ds6_route_nexthop(r));
ADD(") %lus", (unsigned long)r->state.lifetime);
ADD("</li>\n");
SEND(&s->sout);
}
ADD(" </ul>\n");
SEND(&s->sout);
}
#endif /* UIP_MAX_ROUTES != 0 */
#if (UIP_SR_LINK_NUM != 0)
if(uip_sr_num_nodes() > 0) {
static uip_sr_node_t *link;
ADD(" Routing links\n <ul>\n");
SEND(&s->sout);
for(link = uip_sr_node_head(); link != NULL; link = uip_sr_node_next(link)) {
if(link->parent != NULL) {
uip_ipaddr_t child_ipaddr;
uip_ipaddr_t parent_ipaddr;
NETSTACK_ROUTING.get_sr_node_ipaddr(&child_ipaddr, link);
NETSTACK_ROUTING.get_sr_node_ipaddr(&parent_ipaddr, link->parent);
ADD(" <li>");
ipaddr_add(&child_ipaddr);
ADD(" (parent: ");
ipaddr_add(&parent_ipaddr);
ADD(") %us", (unsigned int)link->lifetime);
ADD("</li>\n");
SEND(&s->sout);
}
}
ADD(" </ul>");
SEND(&s->sout);
}
#endif /* UIP_SR_LINK_NUM != 0 */
SEND_STRING(&s->sout, BOTTOM);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
PROCESS(webserver_nogui_process, "Web server");
PROCESS_THREAD(webserver_nogui_process, ev, data)
{
PROCESS_BEGIN();
httpd_init();
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
httpd_appcall(data);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
return generate_routes;
}
/*---------------------------------------------------------------------------*/