/* * 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. * * */ /* * 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 #include #include #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" /* RADIOSTATS must also be set in clock.c and the radio driver */ #if RF230BB #define RADIOSTATS 1 #endif #if CONTIKI_TARGET_REDBEE_ECONOTAG #include "adc.h" #endif short sleepcount; #if WEBSERVER_CONF_CGI static struct httpd_cgi_call *calls = NULL; /*cgi function names*/ #if WEBSERVER_CONF_HEADER static const char hdr_name[] HTTPD_STRING_ATTR = "header"; #endif #if WEBSERVER_CONF_FILESTATS static const char file_name[] HTTPD_STRING_ATTR = "file-stats"; #endif #if WEBSERVER_CONF_TCPSTATS static const char tcp_name[] HTTPD_STRING_ATTR = "tcp-connections"; #endif #if WEBSERVER_CONF_PROCESSES static const char proc_name[] HTTPD_STRING_ATTR = "processes"; #endif #if WEBSERVER_CONF_SENSORS static const char sensor_name[] HTTPD_STRING_ATTR = "sensors"; #endif #if WEBSERVER_CONF_ADDRESSES static const char adrs_name[] HTTPD_STRING_ATTR = "addresses"; #endif #if WEBSERVER_CONF_NEIGHBORS static const char nbrs_name[] HTTPD_STRING_ATTR = "neighbors"; #endif #if WEBSERVER_CONF_ROUTES static const char rtes_name[] HTTPD_STRING_ATTR = "routes"; #endif #if WEBSERVER_CONF_TICTACTOE static const char tictac_name[] HTTPD_STRING_ATTR = "tictac"; #endif #if WEBSERVER_CONF_AJAX static const char ajax_name[] HTTPD_STRING_ATTR = "ajaxdata"; #endif #endif /*Process states for processes cgi*/ #if WEBSERVER_CONF_PROCESSES || WEBSERVER_CONF_TCPSTATS 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}; #endif #if WEBSERVER_CONF_SENSORS static char sensor_temperature[14]="Not Available"; static char sensor_extvoltage[14]="Not Available"; 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 #endif #if 0 void web_set_temp(char *s) { strcpy(sensor_temperature, s); // printf_P(PSTR("got temp")); last_tempupdate=seconds; } void web_set_voltage(char *s) { strcpy(sensor_extvoltage, s); // printf_P(PSTR("got volts")); last_extvoltageupdate=seconds; } #endif #if WEBSERVER_CONF_CGI /*---------------------------------------------------------------------------*/ 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 WEBSERVER_CONF_HEADER /*---------------------------------------------------------------------------*/ static unsigned short generate_header(void *arg) { unsigned short numprinted=0; #if WEBSERVER_CONF_HEADER_W3C #define _MSS1 100 static const char httpd_cgi_headerw[] HTTPD_STRING_ATTR = ""; numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerw); #endif #if WEBSERVER_CONF_HEADER_ICON #define _MSS2 105 #ifdef WEBSERVER_CONF_PAGETITLE static const char httpd_cgi_header1[] HTTPD_STRING_ATTR = "%s"; #else static const char httpd_cgi_header1[] HTTPD_STRING_ATTR = "Contiki-Nano"; #endif #else #define _MSS2 52 #ifdef WEBSERVER_CONF_PAGETITLE static const char httpd_cgi_header1[] HTTPD_STRING_ATTR = "%s"; #else static const char httpd_cgi_header1[] HTTPD_STRING_ATTR = "Contiki-Nano"; #endif #endif #ifdef WEBSERVER_CONF_PAGETITLE #define WAD ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr.u8 { char buf[40]; WEBSERVER_CONF_PAGETITLE; numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_header1,buf); } #else numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_header1); #endif #if WEBSERVER_CONF_HEADER_MENU #define _MSS3 32 static const char httpd_cgi_headerm1[] HTTPD_STRING_ATTR = "
Front page";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm1);
#if WEBSERVER_CONF_SENSORS
#define _MSS4 34
  static const char httpd_cgi_headerm2[] HTTPD_STRING_ATTR = "|Status";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm2);
#endif
#if WEBSERVER_CONF_TCPSTATS
#define _MSS5 44
  static const char httpd_cgi_headerm3[] HTTPD_STRING_ATTR = "|Network connections";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm3);
#endif
#if WEBSERVER_CONF_PROCESSES
#define _MSS6 46
  static const char httpd_cgi_headerm4[] HTTPD_STRING_ATTR = "|System processes";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm4);
#endif
#if WEBSERVER_CONF_FILESTATS
#define _MSS7 45
  static const char httpd_cgi_headerm5[] HTTPD_STRING_ATTR = "|File statistics";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm5);
#endif
#if WEBSERVER_CONF_TICTACTOE
#define _MSS8 44
  static const char httpd_cgi_headerm6[] HTTPD_STRING_ATTR = "|TicTacToe";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm6);
#endif
#if WEBSERVER_CONF_AJAX
#define _MSS9 30
  static const char httpd_cgi_headerm7[] HTTPD_STRING_ATTR = "|Ajax";
  numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerm7);
#endif
  static const char httpd_cgi_headerme[] HTTPD_STRING_ATTR = "
"; numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_headerme); #endif /* WEBSERVER_CONF_MENU */ #if UIP_RECEIVE_WINDOW < _MSS1+_MSS2+_MSS3_+MSS4_+MSS5_MSS6+_MSS7+_MSS8+_MSS9 #warning ************************************************************ #warning UIP_RECEIVE_WINDOW not large enough for header cgi output. #warning Web pages will not render properly! #warning ************************************************************ #endif return numprinted; } /*---------------------------------------------------------------------------*/ static PT_THREAD(header(struct httpd_state *s, char *ptr)) { PSOCK_BEGIN(&s->sout); PSOCK_GENERATOR_SEND(&s->sout, generate_header, (void *) ptr); PSOCK_END(&s->sout); } #endif /* WEBSERVER_CONF_HEADER */ #if WEBSERVER_CONF_FILESTATS /*---------------------------------------------------------------------------*/ static unsigned short generate_file_stats(void *arg) { struct httpd_state *s = (struct httpd_state *)arg; #if WEBSERVER_CONF_LOADTIME static const char httpd_cgi_filestat1[] HTTPD_STRING_ATTR = "



This page has been sent %u times (%1u.%u sec)"; #else static const char httpd_cgi_filestat1[] HTTPD_STRING_ATTR = "



This page has been sent %u times"; #endif static const char httpd_cgi_filestat2[] HTTPD_STRING_ATTR = "%s%d"; 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, s->u.ptr, 20); /* Count for this page, with common page footer */ if (tmp[0]=='.') { #if WEBSERVER_CONF_LOADTIME s->pagetime = clock_time() - s->pagetime; numprinted=httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_filestat1, httpd_fs_open(s->filename, 0), (unsigned int)s->pagetime/CLOCK_SECOND,(unsigned int)s->pagetime%CLOCK_SECOND); #else numprinted=httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_filestat1, httpd_fs_open(s->filename, 0)); #endif /* 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 WEBSERVER_CONF_FILESTATS==2 numprinted+=httpd_snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, httpd_cgi_filestat2, tmp, tmp, f->count); #else 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)); } return numprinted; } /*---------------------------------------------------------------------------*/ static PT_THREAD(file_stats(struct httpd_state *s, char *ptr)) { PSOCK_BEGIN(&s->sout); /* Pass string after cgi invocation to the generator */ s->u.ptr = ptr; PSOCK_GENERATOR_SEND(&s->sout, generate_file_stats, s); PSOCK_END(&s->sout); } #endif /* WEBSERVER_CONF_FILESTATS*/ #if WEBSERVER_CONF_TCPSTATS /*---------------------------------------------------------------------------*/ static unsigned short make_tcp_stats(void *arg) { static const char httpd_cgi_tcpstat1[] HTTPD_STRING_ATTR = "%d"; static const char httpd_cgi_tcpstat2[] HTTPD_STRING_ATTR = "-%u%s%u%u%c %c\r\n"; static const char httpd_cgi_tcpstat3[] HTTPD_STRING_ATTR = "[Room for %d more]"; struct uip_conn *conn; struct httpd_state *s = (struct httpd_state *)arg; char tstate[20]; uint16_t numprinted; if (s->u.count==UIP_CONNS){ for(numprinted = 0; numprinted < UIP_CONNS; numprinted++ ) { if((uip_conns[numprinted].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED) s->u.count--; } return(httpd_snprintf((char *)uip_appdata, uip_mss(), httpd_cgi_tcpstat3, s->u.count)); } 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); s->u.count=UIP_CONNS; PSOCK_GENERATOR_SEND(&s->sout, make_tcp_stats, s); 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); } #endif /* WEBSERVER_CONF_TCPSTATS */ #if WEBSERVER_CONF_PROCESSES /*---------------------------------------------------------------------------*/ static unsigned short make_processes(void *p) { static const char httpd_cgi_proc[] HTTPD_STRING_ATTR = "%p%s%p%s\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)), * (char **)(&(((struct process *)p)->thread)), //minimal net 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); } #endif /* WEBSERVER_CONF_PROCESSES */ #if WEBSERVER_CONF_ADDRESSES || WEBSERVER_CONF_NEIGHBORS || WEBSERVER_CONF_ROUTES static const char httpd_cgi_addrh[] HTTPD_STRING_ATTR = ""; static const char httpd_cgi_addrf[] HTTPD_STRING_ATTR = "[Room for %u more]"; static const char httpd_cgi_addrb[] HTTPD_STRING_ATTR = "
"; static const char httpd_cgi_addrn[] HTTPD_STRING_ATTR = "(none)
"; #endif #if WEBSERVER_CONF_ADDRESSES /*---------------------------------------------------------------------------*/ 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; isout); PSOCK_GENERATOR_SEND(&s->sout, make_addresses, s->u.ptr); PSOCK_END(&s->sout); } #endif /* WEBSERVER_CONF_ADDRESSES */ #if WEBSERVER_CONF_NEIGHBORS extern uip_ds6_nbr_t uip_ds6_nbr_cache[]; /*---------------------------------------------------------------------------*/ 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); for (i=0; isout); PSOCK_GENERATOR_SEND(&s->sout, make_neighbors, s->u.ptr); PSOCK_END(&s->sout); } #endif #if WEBSERVER_CONF_ROUTES extern uip_ds6_route_t uip_ds6_routing_table[]; /*---------------------------------------------------------------------------*/ 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
"; static const char httpd_cgi_rtes3[] HTTPD_STRING_ATTR = ")
"; uint8_t i,j=0; uint16_t numprinted; numprinted = httpd_snprintf((char *)uip_appdata, uip_mss(),httpd_cgi_addrh); for (i=0; isout); PSOCK_GENERATOR_SEND(&s->sout, make_routes, s->u.ptr); PSOCK_END(&s->sout); } #endif /* WEBSERVER_CONF_ROUTES */ #if WEBSERVER_CONF_SENSORS /*---------------------------------------------------------------------------*/ static unsigned short generate_sensor_readings(void *arg) { uint16_t numprinted; uint16_t days,h,m,s; unsigned long seconds=clock_seconds(); static const char httpd_cgi_sensor0[] HTTPD_STRING_ATTR = "[Updated %d seconds ago]

"; static const char httpd_cgi_sensor1[] HTTPD_STRING_ATTR = "

Temperature: %s\n";
  static const char httpd_cgi_sensor2[] HTTPD_STRING_ATTR = "Battery    : %s\n";
//  static const char httpd_cgi_sensr12[] HTTPD_STRING_ATTR = "Temperature: %s   Battery: %s
";
  static const char httpd_cgi_sensor3[] HTTPD_STRING_ATTR = "Uptime     : %02d:%02d:%02d\n";
  static const char httpd_cgi_sensor3d[] HTTPD_STRING_ATTR = "Uptime    : %u days %02u:%02u:%02u\n";
// static const char httpd_cgi_sensor4[] HTTPD_STRING_ATTR = "Sleeping time : %02d:%02d:%02d (%d%%)
";

  numprinted=0;
  /* Generate temperature and voltage strings for each platform */
#if CONTIKI_TARGET_AVR_ATMEGA128RFA1  
{uint8_t i;
  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 0
  ADCSRB|=1<>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;
  static const char httpd_cgi_sensor1_printf[] HTTPD_STRING_ATTR = "%d.%d C";
  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 ( i=16; i<31; i++) {
    BATMON = i;
    if ((BATMON&(1<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);
}
#endif /* WEBSERVER_CONF_SENSORS */

#if WEBSERVER_CONF_TICTACTOE
/*---------------------------------------------------------------------------*/
static uint8_t whowon(char x) {

  if (httpd_query[0]==x) {
    if(((httpd_query[1]==x)&&(httpd_query[2]==x))
    || ((httpd_query[4]==x)&&(httpd_query[8]==x))
    || ((httpd_query[3]==x)&&(httpd_query[6]==x))){
      return 1;
    }
  }
  if (httpd_query[1]==x) {
    if ((httpd_query[4]==x)&&(httpd_query[7]==x)) {
      return 1;
    }
  }
  if (httpd_query[2]==x) {
    if(((httpd_query[4]==x)&&(httpd_query[6]==x))
    || ((httpd_query[5]==x)&&(httpd_query[8]==x))){
      return 1;
    }
  }
  if (httpd_query[3]==x) {
    if ((httpd_query[4]==x)&&(httpd_query[5]==x)) {
      return 1;
    }
  }
  if (httpd_query[6]==x) {
    if ((httpd_query[7]==x)&&(httpd_query[8]==x)) {
      return 1;
    }
  }
 return 0;
}

/*---------------------------------------------------------------------------*/
static unsigned short
make_tictactoe(void *p)
{
  uint8_t i,newgame,iwon,uwon,nx,no;
  char me,you,locater;
  unsigned short numprinted=0;
  
 /* If no query string restart game, else put into proper form */
  newgame=0;httpd_query[9]=0;
  if ((httpd_query[0]==0)||(httpd_query[0]==' ')) {
    newgame=1;
    for (i=0;i<9;i++) httpd_query[i]='b';
  } else for (i=0;i<9;i++) {
    if (!((httpd_query[i]=='x')||(httpd_query[i]=='o'))) {
      httpd_query[i]='b';
    }
  }

  /* I am x if I move first, or if number of x's is <= number of o's */
  for (nx=0,no=0,i=0;i<9;i++) {
    if (httpd_query[i]=='x') nx++;
    else if (httpd_query[i]=='o') no++;
  }
  if ((no>=nx)&&!newgame) {me='x';you='o';}
  else {me='o';you='x';};

  iwon=whowon(me);
  uwon=whowon(you);

  if (newgame||iwon||uwon||(nx+no)>=9) goto showboard;
 
  /* Make a move */
  if (me=='x') nx++;else no++;
  if (httpd_query[4]=='b') httpd_query[4]=me;
  else if (httpd_query[0]=='b') httpd_query[0]=me;
  else if (httpd_query[2]=='b') httpd_query[2]=me;
  else if (httpd_query[6]=='b') httpd_query[6]=me;
  else if (httpd_query[8]=='b') httpd_query[8]=me;
  else if (httpd_query[1]=='b') httpd_query[1]=me;
  else if (httpd_query[3]=='b') httpd_query[3]=me;
  else if (httpd_query[5]=='b') httpd_query[5]=me;
  else if (httpd_query[7]=='b') httpd_query[7]=me;
  
  /* Did I win? */
  iwon=whowon(me);

  showboard: 
  for (i=0;i<9;i++) {
  
    if (i==4) locater='c';
    else if ((i==1)||(i==7)) locater='v';
    else if ((i==3)||(i==5)) locater='h';
    else locater=0;
    
    if ((httpd_query[i]=='b')&&(!(iwon||uwon))) {
        httpd_query[i]=you;
        numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "");
    if (httpd_query[i]=='b') {       
        numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "");       
    }
    if ((i==2)||(i==5)) {
      numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
");
    }
  }
  
  if ((nx>(no+1))||(no>(nx+1))) {
     numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
You cheated!!!
");
  } else if (iwon) {
     numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
I Win!
");
  } else if (uwon) { 
     numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
You Win!
");
  } else if ((nx+no)==9) {
     numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
Draw!
");
  }
  if (iwon||uwon||((nx+no)==9)) {
       numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "
Play Again");
  }

  /* If new game give option for me to start */
  if ((nx==0)&&(no==0)) {
     numprinted+=snprintf((char *)uip_appdata+numprinted, uip_mss()-numprinted, "

Let computer move first");
  }
  httpd_query[0]=0;  //zero the query string
  return numprinted;

}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(tictactoe(struct httpd_state *s, char *ptr))
{
  PSOCK_BEGIN(&s->sout);
  PSOCK_GENERATOR_SEND(&s->sout, make_tictactoe, s);
  PSOCK_END(&s->sout);
}
#endif /* WEBSERVER_CONF_TICTACTOE */

#if WEBSERVER_CONF_AJAX
/*---------------------------------------------------------------------------*/
static
PT_THREAD(ajax_call(struct httpd_state *s, char *ptr))
{
  static struct timer t;
  static int iter;
  static char buf[128];
  static uint8_t numprinted;
  
  PSOCK_BEGIN(&s->sout);
/*TODO:pick up time from ? parameter */
  timer_set(&t, 2*CLOCK_SECOND);
  iter = 0;
  
  while(1) {
  	iter++;

#if CONTIKI_TARGET_SKY
    SENSORS_ACTIVATE(sht11_sensor);
    SENSORS_ACTIVATE(light_sensor);
    numprinted = snprintf(buf, sizeof(buf),
	     "t(%d);h(%d);l1(%d);l2(%d);",
	     sht11_sensor.value(SHT11_SENSOR_TEMP),
	     sht11_sensor.value(SHT11_SENSOR_HUMIDITY),
         light_sensor.value(LIGHT_SENSOR_PHOTOSYNTHETIC),
         light_sensor.value(LIGHT_SENSOR_TOTAL_SOLAR));
    SENSORS_DEACTIVATE(sht11_sensor);
    SENSORS_DEACTIVATE(light_sensor);

#elif CONTIKI_TARGET_MB851
  SENSORS_ACTIVATE(acc_sensor);    
  numprinted = snprintf(buf, sizeof(buf),"t(%d);ax(%d);ay(%d);az(%d);",
	     temperature_sensor.value(0),
	     acc_sensor.value(ACC_X_AXIS),
	     acc_sensor.value(ACC_Y_AXIS),
	     acc_sensor.value(ACC_Z_AXIS));   
  SENSORS_DEACTIVATE(acc_sensor);

#elif CONTIKI_TARGET_REDBEE_ECONOTAG
{	uint8_t c;
	adc_reading[8]=0;
	adc_init();
	while (adc_reading[8]==0) adc_service();
    adc_disable();
    numprinted = snprintf(buf, sizeof(buf),"b(%u);adc(%u,%u,%u,%u,%u,%u,%u,%u);",
        1200*0xfff/adc_reading[8],adc_reading[0],adc_reading[1],adc_reading[2],adc_reading[3],adc_reading[4],adc_reading[5],adc_reading[6],adc_reading[7]);
}
		
#elif CONTIKI_TARGET_MINIMAL_NET
static uint16_t c0=0x3ff,c1=0x3ff,c2=0x3ff,c3=0x3ff,c4=0x3ff,c5=0x3ff,c6=0x3ff,c7=0x3ff;
    numprinted = snprintf(buf, sizeof(buf), "t(%d);b(%u);v(%u);",273+(rand()&0x3f),3300-iter/10,iter);
	numprinted += snprintf(buf+numprinted, sizeof(buf)-numprinted,"adc(%u,%u,%u,%u,%u,%u,%u,%u);",c0,c1,c2,c3,c4,c5,c6,c7);
	c0+=(rand()&0xf)-8;
	c1+=(rand()&0xf)-8;
	c2+=(rand()&0xf)-7;
	c3+=(rand()&0x1f)-15;
	c4+=(rand()&0x3)-1;
	c5+=(rand()&0xf)-8;
	c6+=(rand()&0xf)-8;
	c7+=(rand()&0xf)-8;
  if (iter==1) {
    static const char httpd_cgi_ajax11[] HTTPD_STRING_ATTR = "wt('Minimal-net ";
	static const char httpd_cgi_ajax12[] HTTPD_STRING_ATTR = "');";
    numprinted += httpd_snprintf(buf+numprinted, sizeof(buf)-numprinted,httpd_cgi_ajax11);
#if WEBSERVER_CONF_PRINTADDR
/* Note address table is filled from the end down */
{int i;
    for (i=0; i>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      
#endif
/* Bandgap can't be measured against supply voltage in this chip. */
/* Use BATMON register instead */
  for ( i=16; i<31; i++) {
    BATMON = i;
    if ((BATMON&(1<sout, buf);
    timer_restart(&t);
	PSOCK_WAIT_UNTIL(&s->sout, timer_expired(&t));
}
  PSOCK_END(&s->sout);
}
#endif /* WEBSERVER_CONF_AJAX */
/*---------------------------------------------------------------------------*/
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  WEBSERVER_CONF_HEADER
HTTPD_CGI_CALL(    hdr,    hdr_name, header         );
#endif
#if  WEBSERVER_CONF_FILESTATS
HTTPD_CGI_CALL(   file,   file_name, file_stats     );
#endif
#if  WEBSERVER_CONF_TCPSTATS
HTTPD_CGI_CALL(    tcp,    tcp_name, tcp_stats      );
#endif
#if  WEBSERVER_CONF_PROCESSES
HTTPD_CGI_CALL(   proc,   proc_name, processes      );
#endif
#if  WEBSERVER_CONF_ADDRESSES
HTTPD_CGI_CALL(   adrs,   adrs_name, addresses      );
#endif
#if  WEBSERVER_CONF_NEIGHBORS
HTTPD_CGI_CALL(   nbrs,   nbrs_name, neighbors      );
#endif
#if  WEBSERVER_CONF_ROUTES
HTTPD_CGI_CALL(   rtes,   rtes_name, routes         );
#endif
#if  WEBSERVER_CONF_SENSORS
HTTPD_CGI_CALL(sensors, sensor_name, sensor_readings);
#endif
#if WEBSERVER_CONF_TICTACTOE
HTTPD_CGI_CALL( tictac, tictac_name, tictactoe      );
#endif
#if WEBSERVER_CONF_AJAX
HTTPD_CGI_CALL( ajax, ajax_name, ajax_call          );
#endif

void
httpd_cgi_init(void)
{
#if  WEBSERVER_CONF_HEADER
  httpd_cgi_add(    &hdr);
#endif
#if  WEBSERVER_CONF_FILESTATS
  httpd_cgi_add(   &file);
#endif
#if  WEBSERVER_CONF_TCPSTATS
  httpd_cgi_add(    &tcp);
#endif
#if  WEBSERVER_CONF_PROCESSES
  httpd_cgi_add(   &proc);
#endif
#if  WEBSERVER_CONF_ADDRESSES
  httpd_cgi_add(   &adrs);
#endif
#if  WEBSERVER_CONF_NEIGHBORS
  httpd_cgi_add(   &nbrs);
#endif
#if  WEBSERVER_CONF_ROUTES
  httpd_cgi_add(   &rtes);
#endif
#if  WEBSERVER_CONF_SENSORS
  httpd_cgi_add(&sensors);
#endif
#if  WEBSERVER_CONF_TICTACTOE
  httpd_cgi_add( &tictac);
#endif
#if  WEBSERVER_CONF_AJAX
  httpd_cgi_add( &ajax);
#endif
}
#endif /* WEBSERVER_CONF_CGI */

#if WEBSERVER_CONF_PRINTADDR
/*---------------------------------------------------------------------------*/
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;
                        //all zeroes ?
                       if (zerocnt > 7) {*result++ = ':';*result++ = ':';}
                        }
                //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);
        }
#endif /* WEBSERVER_CONF_PRINTADDR */