nes-proj/apps/raven-webserver/httpd-cgi.c

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2008-10-14 10:14:13 +00:00
/*
* Copyright (c) 2001, Adam Dunkels.
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 uIP TCP/IP stack.
*
* $Id: httpd-cgi.c,v 1.1 2008/10/14 10:14:13 julienabeille Exp $
*
*/
/*
* This file includes functions that are called by the web server
* scripts. The functions takes no argument, and the return value is
* interpreted as follows. A zero means that the function did not
* complete and should be invoked for the next packet as well. A
* non-zero value indicates that the function has completed and that
* the web server should move along to the next script line.
*
*/
#include <stdio.h>
#include <string.h>
#include "contiki-net.h"
#include "httpd.h"
#include "httpd-cgi.h"
#include "httpd-fs.h"
#include "lib/petsciiconv.h"
#include "sensors.h"
static struct httpd_cgi_call *calls = NULL;
static const char closed[] = /* "CLOSED",*/
{0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0};
static const char syn_rcvd[] = /* "SYN-RCVD",*/
{0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56,
0x44, 0};
static const char syn_sent[] = /* "SYN-SENT",*/
{0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e,
0x54, 0};
static const char established[] = /* "ESTABLISHED",*/
{0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49,
0x53, 0x48, 0x45, 0x44, 0};
static const char fin_wait_1[] = /* "FIN-WAIT-1",*/
{0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
0x54, 0x2d, 0x31, 0};
static const char fin_wait_2[] = /* "FIN-WAIT-2",*/
{0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
0x54, 0x2d, 0x32, 0};
static const char closing[] = /* "CLOSING",*/
{0x43, 0x4c, 0x4f, 0x53, 0x49,
0x4e, 0x47, 0};
static const char time_wait[] = /* "TIME-WAIT,"*/
{0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41,
0x49, 0x54, 0};
static const char last_ack[] = /* "LAST-ACK"*/
{0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43,
0x4b, 0};
static const char none[] = /* "NONE"*/
{0x4e, 0x4f, 0x4e, 0x45, 0};
static const char running[] = /* "RUNNING"*/
{0x52, 0x55, 0x4e, 0x4e, 0x49, 0x4e, 0x47,
0};
static const char called[] = /* "CALLED"*/
{0x43, 0x41, 0x4c, 0x4c, 0x45, 0x44, 0};
static const char file_name[] = /* "file-stats"*/
{0x66, 0x69, 0x6c, 0x65, 0x2d, 0x73, 0x74,
0x61, 0x74, 0x73, 0};
static const char tcp_name[] = /* "tcp-connections"*/
{0x74, 0x63, 0x70, 0x2d, 0x63, 0x6f, 0x6e,
0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e,
0x73, 0};
static const char proc_name[] = /* "processes"*/
{0x70, 0x72, 0x6f, 0x63, 0x65, 0x73, 0x73,
0x65, 0x73, 0};
static const char sensor_name[] = "sensors";
char sensor_temperature[12];
static const char *states[] = {
closed,
syn_rcvd,
syn_sent,
established,
fin_wait_1,
fin_wait_2,
closing,
time_wait,
last_ack,
none,
running,
called};
uint8_t sprint_ip6(uip_ip6addr_t addr, char * result);
void
web_set_temp(char *s)
{
strcpy(sensor_temperature, s);
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(nullfunction(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_cgifunction
httpd_cgi(char *name)
{
struct httpd_cgi_call *f;
/* Find the matching name in the table, return the function. */
for(f = calls; f != NULL; f = f->next) {
if(strncmp(f->name, name, strlen(f->name)) == 0) {
return f->function;
}
}
return nullfunction;
}
/*---------------------------------------------------------------------------*/
static unsigned short
generate_file_stats(void *arg)
{
char *f = (char *)arg;
return snprintf((char *)uip_appdata, uip_mss(), "%5u", httpd_fs_count(f));
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(file_stats(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_file_stats, (void *) (strchr(ptr, ' ') + 1));
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
make_tcp_stats(void *arg)
{
struct uip_conn *conn;
struct httpd_state *s = (struct httpd_state *)arg;
uint16_t numprinted;
conn = &uip_conns[s->u.count];
numprinted = snprintf((char *)uip_appdata, uip_mss(),
"<tr align=\"center\"><td>%d</td><td>",
htons(conn->lport));
numprinted += sprint_ip6(conn->ripaddr, uip_appdata + numprinted);
numprinted += snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted,
"-%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n",
htons(conn->rport),
states[conn->tcpstateflags & UIP_TS_MASK],
conn->nrtx,
conn->timer,
(uip_outstanding(conn))? '*':' ',
(uip_stopped(conn))? '!':' ');
return numprinted;
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(tcp_stats(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
for(s->u.count = 0; s->u.count < UIP_CONNS; ++s->u.count) {
if((uip_conns[s->u.count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED) {
PSOCK_GENERATOR_SEND(&s->sout, make_tcp_stats, s);
}
}
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
make_processes(void *p)
{
char name[40];
strncpy(name, ((struct process *)p)->name, 40);
petsciiconv_toascii(name, 40);
return snprintf((char *)uip_appdata, uip_mss(),
"<tr align=\"center\"><td>%p</td><td>%s</td><td>%p</td><td>%s</td></tr>\r\n",
p, name,
*((char **)&(((struct process *)p)->thread)),
states[9 + ((struct process *)p)->state]);
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(processes(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
for(s->u.ptr = PROCESS_LIST(); s->u.ptr != NULL; s->u.ptr = ((struct process *)s->u.ptr)->next) {
PSOCK_GENERATOR_SEND(&s->sout, make_processes, s->u.ptr);
}
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
generate_sensor_readings(void *arg)
{
return snprintf((char *)uip_appdata, uip_mss(), "<em>Temperature:</em> %s\n", sensor_temperature);
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(sensor_readings(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_sensor_readings, s);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
void
httpd_cgi_add(struct httpd_cgi_call *c)
{
struct httpd_cgi_call *l;
c->next = NULL;
if(calls == NULL) {
calls = c;
} else {
for(l = calls; l->next != NULL; l = l->next);
l->next = c;
}
}
/*---------------------------------------------------------------------------*/
HTTPD_CGI_CALL(file, file_name, file_stats);
HTTPD_CGI_CALL(tcp, tcp_name, tcp_stats);
HTTPD_CGI_CALL(proc, proc_name, processes);
HTTPD_CGI_CALL(sensors, sensor_name, sensor_readings);
void
httpd_cgi_init(void)
{
httpd_cgi_add(&file);
httpd_cgi_add(&tcp);
httpd_cgi_add(&proc);
httpd_cgi_add(&sensors);
}
/*---------------------------------------------------------------------------*/
uint8_t sprint_ip6(uip_ip6addr_t addr, char * result)
{
unsigned char zerocnt = 0;
unsigned char numprinted = 0;
char * starting = result;
unsigned char i = 0;
while (numprinted < 8)
{
//Address is zero, have we used our ability to
//replace a bunch with : yet?
if ((addr.u16[i] == 0) && (zerocnt == 0))
{
//How mant zeros?
zerocnt = 0;
while(addr.u16[zerocnt + i] == 0)
zerocnt++;
//just one, don't waste our zeros...
if (zerocnt == 1)
{
*result++ = '0';
numprinted++;
break;
}
//Cool - can replace a bunch of zeros
i += zerocnt;
numprinted += zerocnt;
}
//Normal address, just print it
else
{
result += sprintf(result, "%x", (unsigned int)(ntohs(addr.u16[i])));
i++;
numprinted++;
}
//Don't print : on last one
if (numprinted != 8)
*result++ = ':';
}
return (result - starting);
}