contiki/platform/avr-atmega128rfa1/apps/raven-webserver/httpd-cgi.c
2013-08-19 17:48:30 +02:00

603 lines
22 KiB
C

/*
* 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.
*
*
*/
#include <util/delay.h>
#define delay_us( us ) ( _delay_us( ( us ) ) )
/*
* 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 "httpd-fsdata.h"
#include "lib/petsciiconv.h"
#include "sensors.h"
#define DEBUGLOGIC 0 //See httpd.c, if 1 must also set it there!
#if DEBUGLOGIC
#define uip_mss(...) 512
#define uip_appdata TCPBUF
extern char TCPBUF[512];
#endif
/* RADIOSTATS must also be set in clock.c and the radio driver */
#if RF230BB
#define RADIOSTATS 1
#endif
static struct httpd_cgi_call *calls = NULL;
/*cgi function names*/
#if HTTPD_FS_STATISTICS
static const char file_name[] HTTPD_STRING_ATTR = "file-stats";
#endif
static const char tcp_name[] HTTPD_STRING_ATTR = "tcp-connections";
static const char proc_name[] HTTPD_STRING_ATTR = "processes";
static const char sensor_name[] HTTPD_STRING_ATTR = "sensors";
static const char adrs_name[] HTTPD_STRING_ATTR = "addresses";
static const char nbrs_name[] HTTPD_STRING_ATTR = "neighbors";
static const char rtes_name[] HTTPD_STRING_ATTR = "routes";
/*Process states for processes cgi*/
static const char closed[] HTTPD_STRING_ATTR = "CLOSED";
static const char syn_rcvd[] HTTPD_STRING_ATTR = "SYN-RCVD";
static const char syn_sent[] HTTPD_STRING_ATTR = "SYN-SENT";
static const char established[] HTTPD_STRING_ATTR = "ESTABLISHED";
static const char fin_wait_1[] HTTPD_STRING_ATTR = "FIN-WAIT-1";
static const char fin_wait_2[] HTTPD_STRING_ATTR = "FIN-WAIT-2";
static const char closing[] HTTPD_STRING_ATTR = "CLOSING";
static const char time_wait[] HTTPD_STRING_ATTR = "TIME-WAIT";
static const char last_ack[] HTTPD_STRING_ATTR = "LAST-ACK";
static const char none[] HTTPD_STRING_ATTR = "NONE";
static const char running[] HTTPD_STRING_ATTR = "RUNNING";
static const char called[] HTTPD_STRING_ATTR = "CALLED";
static const char *states[] = {
closed,
syn_rcvd,
syn_sent,
established,
fin_wait_1,
fin_wait_2,
closing,
time_wait,
last_ack,
none,
running,
called};
static char sensor_temperature[12]="Not Enabled";
static char sensor_extvoltage[12]="Not Enabled";
// static unsigned long last_tempupdate,last_extvoltageupdate;
extern unsigned long seconds, sleepseconds;
#if RADIOSTATS
extern unsigned long radioontime;
static unsigned long savedradioontime;
extern uint8_t RF230_radio_on, rf230_last_rssi;
extern uint16_t RF230_sendpackets,RF230_receivepackets,RF230_sendfail,RF230_receivefail;
#endif
#if 0
void
web_set_temp(char *s)
{
strcpy(sensor_temperature, s);
last_tempupdate=seconds;
}
void
web_set_voltage(char *s)
{
strcpy(sensor_extvoltage, s);
last_extvoltageupdate=seconds;
}
#endif
/*---------------------------------------------------------------------------*/
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(httpd_strncmp(name, f->name, httpd_strlen(f->name)) == 0) {
return f->function;
}
}
return nullfunction;
}
#if HTTPD_FS_STATISTICS
static char *thisfilename;
/*---------------------------------------------------------------------------*/
static unsigned short
generate_file_stats(void *arg)
{
static const char httpd_cgi_filestat1[] HTTPD_STRING_ATTR = "<p class=right><br><br><i>This page has been sent %u times</i></div></body></html>";
static const char httpd_cgi_filestat2[] HTTPD_STRING_ATTR = "<tr><td><a href=\"%s\">%s</a></td><td>%d</td>";
static const char httpd_cgi_filestat3[] HTTPD_STRING_ATTR = "%5u";
char tmp[20];
struct httpd_fsdata_file_noconst *f,fram;
uint16_t i;
unsigned short numprinted;
/* Transfer arg from whichever flash that contains the html file to RAM */
httpd_fs_cpy(&tmp, (char *)arg, 20);
/* Count for this page, with common page footer */
if (tmp[0]=='.') {
numprinted=httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_filestat1, httpd_fs_open(thisfilename, 0));
/* Count for all files */
/* Note buffer will overflow if there are too many files! */
} else if (tmp[0]=='*') {
i=0;numprinted=0;
for(f = (struct httpd_fsdata_file_noconst *)httpd_fs_get_root();
f != NULL;
f = (struct httpd_fsdata_file_noconst *)fram.next) {
/* Get the linked list file entry into RAM from from wherever it is*/
httpd_memcpy(&fram,f,sizeof(fram));
/* Get the file name from whatever memory it is in */
httpd_fs_cpy(&tmp, fram.name, sizeof(tmp));
#if HTTPD_FS_STATISTICS==1
numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_filestat2, tmp, tmp, f->count);
#elif HTTPD_FS_STATISTICS==2
numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_filestat2, tmp, tmp, httpd_filecount[i]);
#endif
i++;
}
/* Count for specified file */
} else {
numprinted=httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_filestat3, httpd_fs_open(tmp, 0));
}
#if DEBUGLOGIC
return 0;
#endif
return numprinted;
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(file_stats(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
thisfilename=&s->filename[0]; //temporary way to pass filename to generate_file_stats
PSOCK_GENERATOR_SEND(&s->sout, generate_file_stats, (void *) ptr);
PSOCK_END(&s->sout);
}
#endif /*HTTPD_FS_STATISTICS*/
/*---------------------------------------------------------------------------*/
static unsigned short
make_tcp_stats(void *arg)
{
static const char httpd_cgi_tcpstat1[] HTTPD_STRING_ATTR = "<tr align=\"center\"><td>%d</td><td>";
static const char httpd_cgi_tcpstat2[] HTTPD_STRING_ATTR = "-%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n";
struct uip_conn *conn;
struct httpd_state *s = (struct httpd_state *)arg;
char tstate[20];
uint16_t numprinted;
conn = &uip_conns[s->u.count];
numprinted = httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_tcpstat1, uip_htons(conn->lport));
numprinted += httpd_cgi_sprint_ip6(conn->ripaddr, uip_appdata + numprinted);
httpd_strcpy(tstate,states[conn->tcpstateflags & UIP_TS_MASK]);
numprinted += httpd_snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted,
httpd_cgi_tcpstat2,
uip_htons(conn->rport),
tstate,
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)
{
static const char httpd_cgi_proc[] HTTPD_STRING_ATTR = "<tr align=\"center\"><td>%p</td><td>%s</td><td>%p</td><td>%s</td></tr>\r\n";
char name[40],tstate[20];
strncpy(name, PROCESS_NAME_STRING((struct process *)p), 40);
petsciiconv_toascii(name, 40);
httpd_strcpy(tstate,states[9 + ((struct process *)p)->state]);
return httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_proc, p, name,
*(char *)(&(((struct process *)p)->thread)),
tstate);
}
/*---------------------------------------------------------------------------*/
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 const char httpd_cgi_addrh[] HTTPD_STRING_ATTR = "<code>";
static const char httpd_cgi_addrf[] HTTPD_STRING_ATTR = "</code>[Room for %u more]";
static const char httpd_cgi_addrb[] HTTPD_STRING_ATTR = "<br>";
static const char httpd_cgi_addrn[] HTTPD_STRING_ATTR = "(none)<br>";
extern uip_ds6_netif_t uip_ds6_if;
static unsigned short
make_addresses(void *p)
{
uint8_t i,j=0;
uint16_t numprinted;
numprinted = httpd_snprintf((char *)uip_appdata, uip_mss(),httpd_cgi_addrh);
for (i=0; i<UIP_DS6_ADDR_NB;i++) {
if (uip_ds6_if.addr_list[i].isused) {
j++;
numprinted += httpd_cgi_sprint_ip6(uip_ds6_if.addr_list[i].ipaddr, uip_appdata + numprinted);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrb);
}
}
//if (j==0) numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrn);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrf, UIP_DS6_ADDR_NB-j);
return numprinted;
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(addresses(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, make_addresses, s->u.ptr);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
make_neighbors(void *p)
{
uint8_t i,j=0;
uint16_t numprinted;
numprinted = httpd_snprintf((char *)uip_appdata, uip_mss(),httpd_cgi_addrh);
uip_ds6_nbr_t *nbr;
for(nbr = nbr_table_head(ds6_neighbors);
nbr != NULL;
nbr = nbr_table_next(ds6_neighbors, nbr)) {
j++;
numprinted += httpd_cgi_sprint_ip6(nbr->ipaddr, uip_appdata + numprinted);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrb);
}
//if (j==0) numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrn);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrf,NBR_TABLE_MAX_NEIGHBORS-j);
return numprinted;
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(neighbors(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, make_neighbors, s->u.ptr);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
make_routes(void *p)
{
static const char httpd_cgi_rtes1[] HTTPD_STRING_ATTR = "(%u (via ";
static const char httpd_cgi_rtes2[] HTTPD_STRING_ATTR = ") %lus<br>";
static const char httpd_cgi_rtes3[] HTTPD_STRING_ATTR = ")<br>";
uint8_t i,j=0;
uint16_t numprinted;
uip_ds6_route_t *r;
numprinted = httpd_snprintf((char *)uip_appdata, uip_mss(),httpd_cgi_addrh);
for(r = uip_ds6_route_head();
r != NULL;
r = uip_ds6_route_next(r)) {
j++;
numprinted += httpd_cgi_sprint_ip6(r->ipaddr, uip_appdata + numprinted);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_rtes1, r->length);
numprinted += httpd_cgi_sprint_ip6(uip_ds6_route_nexthop(r), uip_appdata + numprinted);
if(r->state.lifetime < 3600) {
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_rtes2, r->state.lifetime);
} else {
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_rtes3);
}
}
}
if (j==0) numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrn);
numprinted += httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_addrf,UIP_DS6_ROUTE_NB-j);
return numprinted;
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(routes(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, make_routes, s->u.ptr);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
static unsigned short
generate_sensor_readings(void *arg)
{
uint16_t numprinted;
uint16_t h,m,s;
uint8_t p1;
// static const char httpd_cgi_sensor0[] HTTPD_STRING_ATTR = "[Updated %d seconds ago]<br><br>";
// static const char httpd_cgi_sensor1[] HTTPD_STRING_ATTR = "<em>Temperature:</em> %s<br>";
// static const char httpd_cgi_sensor2[] HTTPD_STRING_ATTR = "<em>Battery:</em> %s<br>";
static const char httpd_cgi_sensor1_printf[] HTTPD_STRING_ATTR = "%d.%d C";
static const char httpd_cgi_sensor2_printf[] HTTPD_STRING_ATTR = "%d mv";
static const char httpd_cgi_sensr12[] HTTPD_STRING_ATTR = "<em>Temperature:</em> %s <em>Battery:<em> %s<br>";
static const char httpd_cgi_sensor3[] HTTPD_STRING_ATTR = "<em>Elapsed timer :</em> %02d:%02d:%02d<br>";
static const char httpd_cgi_sensor4[] HTTPD_STRING_ATTR = "<em>Sleeping time :</em> %02d:%02d:%02d (%d%%)<br>";
numprinted=0;
// if (last_tempupdate) {
// numprinted =httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_sensor0,seconds-last_tempupdate);
// }
BATMON = 16; //give BATMON time to stabilize at highest range and lowest voltage
/* Measure internal temperature sensor, see atmega128rfa1 datasheet */
/* This code disabled by default for safety. Selecting an internal reference will short it to
anything connected to the AREF pin!
*/
#if 1
ADCSRB|=1<<MUX5; //this bit buffered till ADMUX written to!
ADMUX =0xc9; // Select internal 1.6 volt ref, temperature sensor ADC channel
ADCSRA=0x85; //Enable ADC, not free running, interrupt disabled, clock divider 32 (250 KHz@ 8 MHz)
// while ((ADCSRB&(1<<AVDDOK))==0); //wait for AVDD ok
// while ((ADCSRB&(1<<REFOK))==0); //wait for ref ok
ADCSRA|=1<<ADSC; //Start throwaway conversion
while (ADCSRA&(1<<ADSC)); //Wait till done
ADCSRA|=1<<ADSC; //Start another conversion
while (ADCSRA&(1<<ADSC)); //Wait till done
h=ADC; //Read adc
h=11*h-2728+(h>>2); //Convert to celcius*10 (should be 11.3*h, approximate with 11.25*h)
ADCSRA=0; //disable ADC
ADMUX=0; //turn off internal vref
m=h/10;s=h-10*m;
httpd_snprintf(sensor_temperature,sizeof(sensor_temperature),httpd_cgi_sensor1_printf,m,s);
#endif
/* Bandgap can't be measured against supply voltage in this chip. */
/* Use BATMON register instead */
for ( p1=16; p1<31; p1++) {
BATMON = p1;
// delay_us(100); //delay needed?
if ((BATMON&(1<<BATMON_OK))==0) break;
}
h=2550-75*16-75+75*p1; //-75 to take the floor of the 75 mv transition window
httpd_snprintf(sensor_extvoltage,sizeof(sensor_extvoltage),httpd_cgi_sensor2_printf,h);
numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_sensr12, sensor_temperature,sensor_extvoltage);
// numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_sensor2, sensor_extvoltage);
#if RADIOSTATS
/* Remember radioontime for display below - slow connection might make it report longer than cpu ontime! */
savedradioontime = radioontime;
#endif
h=seconds/3600;
s=seconds-h*3600;
m=s/60;
s=s-m*60;
numprinted+=httpd_snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted, httpd_cgi_sensor3, h,m,s);
if (sleepseconds) {
p1=100UL*sleepseconds/seconds;
h=sleepseconds/3600;
s=sleepseconds-h*3600;
m=s/60;
s=s-m*60;
numprinted+=httpd_snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted, httpd_cgi_sensor4, h,m,s,p1);
}
return numprinted;
}
#if RADIOSTATS
/*---------------------------------------------------------------------------*/
static unsigned short
generate_radio_stats(void *arg)
{
uint16_t numprinted;
uint16_t h,m,s;
uint8_t p1,p2;
static const char httpd_cgi_sensor10[] HTTPD_STRING_ATTR = "<em>Radio on time :</em> %02d:%02d:%02d (%d.%02d%%)<br>";
static const char httpd_cgi_sensor11[] HTTPD_STRING_ATTR = "<em>Packets:</em> Tx=%5d Rx=%5d TxL=%5d RxL=%5d RSSI=%2ddBm\n";
s=(10000UL*savedradioontime)/seconds;
p1=s/100;
p2=s-p1*100;
h=savedradioontime/3600;
s=savedradioontime-h*3600;
m=s/60;
s=s-m*60;
numprinted =httpd_snprintf((char *)uip_appdata , uip_mss() , httpd_cgi_sensor10,\
h,m,s,p1,p2);
#if RF230BB
numprinted+=httpd_snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted, httpd_cgi_sensor11,\
RF230_sendpackets,RF230_receivepackets,RF230_sendfail,RF230_receivefail,-92+rf230_last_rssi);
#else
p1=0;
radio_get_rssi_value(&p1);
p1 = -91*3(p1-1);
numprinted+=httpd_snprintf((char *)uip_appdata + numprinted, uip_mss() - numprinted, httpd_cgi_sensor11,\
RF230_sendpackets,RF230_receivepackets,RF230_sendfail,RF230_receivefail,p1);
#endif
return numprinted;
}
#endif
/*---------------------------------------------------------------------------*/
static
PT_THREAD(sensor_readings(struct httpd_state *s, char *ptr))
{
PSOCK_BEGIN(&s->sout);
PSOCK_GENERATOR_SEND(&s->sout, generate_sensor_readings, s);
#if RADIOSTATS
PSOCK_GENERATOR_SEND(&s->sout, generate_radio_stats, s);
#endif
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;
}
}
/*---------------------------------------------------------------------------*/
#if HTTPD_FS_STATISTICS
HTTPD_CGI_CALL( file, file_name, file_stats);
#endif
HTTPD_CGI_CALL( tcp, tcp_name, tcp_stats );
HTTPD_CGI_CALL( proc, proc_name, processes );
HTTPD_CGI_CALL( adrs, adrs_name, addresses );
HTTPD_CGI_CALL( nbrs, nbrs_name, neighbors );
HTTPD_CGI_CALL( rtes, rtes_name, routes );
HTTPD_CGI_CALL(sensors, sensor_name, sensor_readings);
void
httpd_cgi_init(void)
{
#if HTTPD_FS_STATISTICS
httpd_cgi_add( &file);
#endif
httpd_cgi_add( &tcp);
httpd_cgi_add( &proc);
httpd_cgi_add( &adrs);
httpd_cgi_add( &nbrs);
httpd_cgi_add( &rtes);
httpd_cgi_add(&sensors);
}
/*---------------------------------------------------------------------------*/
uint8_t httpd_cgi_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)(uip_ntohs(addr.u16[i])));
i++;
numprinted++;
}
//Don't print : on last one
if (numprinted != 8)
*result++ = ':';
}
return (result - starting);
}