apps/webserver/httpd-cgi.c

   1 /*
   2  * Copyright (c) 2001, Adam Dunkels.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote
  14  *    products derived from this software without specific prior
  15  *    written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * This file is part of the uIP TCP/IP stack.
  30  *
  31  * $Id: httpd-cgi.c,v 1.14 2008/10/14 11:07:57 adamdunkels Exp $
  32  *
  33  */
  34
  35 /*
  36  * This file includes functions that are called by the web server
  37  * scripts. The functions takes no argument, and the return value is
  38  * interpreted as follows. A zero means that the function did not
  39  * complete and should be invoked for the next packet as well. A
  40  * non-zero value indicates that the function has completed and that
  41  * the web server should move along to the next script line.
  42  *
  43  */
  44
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include "contiki-net.h"
  49 #include "httpd.h"
  50 #include "httpd-cgi.h"
  51 #include "httpd-fs.h"
  52
  53 #include "lib/petsciiconv.h"
  54
  55 static struct httpd_cgi_call *calls = NULL;
  56
  57 static const char closed[] =   /*  "CLOSED",*/
  58 {0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0};
  59 static const char syn_rcvd[] = /*  "SYN-RCVD",*/
  60 {0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56,
  61  0x44,  0};
  62 static const char syn_sent[] = /*  "SYN-SENT",*/
  63 {0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e,
  64  0x54,  0};
  65 static const char established[] = /*  "ESTABLISHED",*/
  66 {0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49,
  67  0x53, 0x48, 0x45, 0x44, 0};
  68 static const char fin_wait_1[] = /*  "FIN-WAIT-1",*/
  69 {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
  70  0x54, 0x2d, 0x31, 0};
  71 static const char fin_wait_2[] = /*  "FIN-WAIT-2",*/
  72 {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
  73  0x54, 0x2d, 0x32, 0};
  74 static const char closing[] = /*  "CLOSING",*/
  75 {0x43, 0x4c, 0x4f, 0x53, 0x49,
  76  0x4e, 0x47, 0};
  77 static const char time_wait[] = /*  "TIME-WAIT,"*/
  78 {0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41,
  79  0x49, 0x54, 0};
  80 static const char last_ack[] = /*  "LAST-ACK"*/
  81 {0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43,
  82  0x4b, 0};
  83 static const char none[] = /*  "NONE"*/
  84 {0x4e, 0x4f, 0x4e, 0x45, 0};
  85 static const char running[] = /*  "RUNNING"*/
  86 {0x52, 0x55, 0x4e, 0x4e, 0x49, 0x4e, 0x47,
  87  0};
  88 static const char called[] = /*  "CALLED"*/
  89 {0x43, 0x41, 0x4c, 0x4c, 0x45, 0x44, 0};
  90 static const char file_name[] = /*  "file-stats"*/
  91 {0x66, 0x69, 0x6c, 0x65, 0x2d, 0x73, 0x74,
  92  0x61, 0x74, 0x73, 0};
  93 static const char tcp_name[] = /*  "tcp-connections"*/
  94 {0x74, 0x63, 0x70, 0x2d, 0x63, 0x6f, 0x6e,
  95  0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e,
  96  0x73, 0};
  97 static const char proc_name[] = /*  "processes"*/
  98 {0x70, 0x72, 0x6f, 0x63, 0x65, 0x73, 0x73,
  99  0x65, 0x73, 0};
 100
 101 static const char *states[] = {
 102   closed,
 103   syn_rcvd,
 104   syn_sent,
 105   established,
 106   fin_wait_1,
 107   fin_wait_2,
 108   closing,
 109   time_wait,
 110   last_ack,
 111   none,
 112   running,
 113   called};
 114
 115 /*---------------------------------------------------------------------------*/
 116 static
 117 PT_THREAD(nullfunction(struct httpd_state *s, char *ptr))
 118 {
 119   PSOCK_BEGIN(&s->sout);
 120   PSOCK_END(&s->sout);
 121 }
 122 /*---------------------------------------------------------------------------*/
 123 httpd_cgifunction
 124 httpd_cgi(char *name)
 125 {
 126   struct httpd_cgi_call *f;
 127
 128   /* Find the matching name in the table, return the function. */
 129   for(f = calls; f != NULL; f = f->next) {
 130     if(strncmp(f->name, name, strlen(f->name)) == 0) {
 131       return f->function;
 132     }
 133   }
 134   return nullfunction;
 135 }
 136 /*---------------------------------------------------------------------------*/
 137 static unsigned short
 138 generate_file_stats(void *arg)
 139 {
 140   char *f = (char *)arg;
 141   return snprintf((char *)uip_appdata, uip_mss(), "%5u", httpd_fs_count(f));
 142 }
 143 /*---------------------------------------------------------------------------*/
 144 static
 145 PT_THREAD(file_stats(struct httpd_state *s, char *ptr))
 146 {
 147   PSOCK_BEGIN(&s->sout);
 148
 149   PSOCK_GENERATOR_SEND(&s->sout, generate_file_stats, (void *) (strchr(ptr, ' ') + 1));
 150
 151   PSOCK_END(&s->sout);
 152 }
 153 /*---------------------------------------------------------------------------*/
 154 static unsigned short
 155 make_tcp_stats(void *arg)
 156 {
 157   struct uip_conn *conn;
 158   struct httpd_state *s = (struct httpd_state *)arg;
 159
 160   conn = &uip_conns[s->u.count];
 161   return snprintf((char *)uip_appdata, uip_mss(),
 162                  "<tr align=\"center\"><td>%d</td><td>%u.%u.%u.%u:%u</td><td>%s</td><td>%u</td><td>%u</td><td>%c %c</td></tr>\r\n",
 163                  htons(conn->lport),
 164                  conn->ripaddr.u8[0],
 165                  conn->ripaddr.u8[1],
 166                  conn->ripaddr.u8[2],
 167                  conn->ripaddr.u8[3],
 168                  htons(conn->rport),
 169                  states[conn->tcpstateflags & UIP_TS_MASK],
 170                  conn->nrtx,
 171                  conn->timer,
 172                  (uip_outstanding(conn))? '*':' ',
 173                  (uip_stopped(conn))? '!':' ');
 174 }
 175 /*---------------------------------------------------------------------------*/
 176 static
 177 PT_THREAD(tcp_stats(struct httpd_state *s, char *ptr))
 178 {
 179
 180   PSOCK_BEGIN(&s->sout);
 181
 182   for(s->u.count = 0; s->u.count < UIP_CONNS; ++s->u.count) {
 183     if((uip_conns[s->u.count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED) {
 184       PSOCK_GENERATOR_SEND(&s->sout, make_tcp_stats, s);
 185     }
 186   }
 187
 188   PSOCK_END(&s->sout);
 189 }
 190 /*---------------------------------------------------------------------------*/
 191 static unsigned short
 192 make_processes(void *p)
 193 {
 194   char name[40];
 195
 196   strncpy(name, ((struct process *)p)->name, 40);
 197   petsciiconv_toascii(name, 40);
 198
 199   return snprintf((char *)uip_appdata, uip_mss(),
 200                  "<tr align=\"center\"><td>%p</td><td>%s</td><td>%p</td><td>%s</td></tr>\r\n",
 201                  p, name,
 202                  *((char **)&(((struct process *)p)->thread)),
 203                  states[9 + ((struct process *)p)->state]);
 204 }
 205 /*---------------------------------------------------------------------------*/
 206 static
 207 PT_THREAD(processes(struct httpd_state *s, char *ptr))
 208 {
 209   PSOCK_BEGIN(&s->sout);
 210   for(s->u.ptr = PROCESS_LIST(); s->u.ptr != NULL; s->u.ptr = ((struct process *)s->u.ptr)->next) {
 211     PSOCK_GENERATOR_SEND(&s->sout, make_processes, s->u.ptr);
 212   }
 213   PSOCK_END(&s->sout);
 214 }
 215 /*---------------------------------------------------------------------------*/
 216 void
 217 httpd_cgi_add(struct httpd_cgi_call *c)
 218 {
 219   struct httpd_cgi_call *l;
 220
 221   c->next = NULL;
 222   if(calls == NULL) {
 223     calls = c;
 224   } else {
 225     for(l = calls; l->next != NULL; l = l->next);
 226     l->next = c;
 227   }
 228 }
 229 /*---------------------------------------------------------------------------*/
 230
 231 HTTPD_CGI_CALL(file, file_name, file_stats);
 232 HTTPD_CGI_CALL(tcp, tcp_name, tcp_stats);
 233 HTTPD_CGI_CALL(proc, proc_name, processes);
 234
 235 void
 236 httpd_cgi_init(void)
 237 {
 238   httpd_cgi_add(&file);
 239   httpd_cgi_add(&tcp);
 240   httpd_cgi_add(&proc);
 241 }
 242 /*---------------------------------------------------------------------------*/