httpd-cgi.c

00001 /**
00002  * \addtogroup httpd
00003  * @{
00004  */
00005 
00006 /**
00007  * \file
00008  *         Web server script interface
00009  * \author
00010  *         Adam Dunkels <adam@sics.se>
00011  *
00012  */
00013 
00014 /*
00015  * Copyright (c) 2001-2006, Adam Dunkels.
00016  * All rights reserved.
00017  *
00018  * Redistribution and use in source and binary forms, with or without
00019  * modification, are permitted provided that the following conditions
00020  * are met:
00021  * 1. Redistributions of source code must retain the above copyright
00022  *    notice, this list of conditions and the following disclaimer.
00023  * 2. Redistributions in binary form must reproduce the above copyright
00024  *    notice, this list of conditions and the following disclaimer in the
00025  *    documentation and/or other materials provided with the distribution.
00026  * 3. The name of the author may not be used to endorse or promote
00027  *    products derived from this software without specific prior
00028  *    written permission.
00029  *
00030  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
00031  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00032  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00033  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
00034  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00035  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00036  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00037  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00038  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00039  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00040  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00041  *
00042  * This file is part of the uIP TCP/IP stack.
00043  *
00044  * $Id: httpd-cgi.c,v 1.2 2006/06/11 21:46:37 adam Exp $
00045  *
00046  */
00047 
00048 #include "uip.h"
00049 #include "psock.h"
00050 #include "httpd.h"
00051 #include "httpd-cgi.h"
00052 #include "httpd-fs.h"
00053 
00054 #include <stdio.h>
00055 #include <string.h>
00056 
00057 HTTPD_CGI_CALL(file, "file-stats", file_stats);
00058 HTTPD_CGI_CALL(tcp, "tcp-connections", tcp_stats);
00059 HTTPD_CGI_CALL(net, "net-stats", net_stats);
00060 
00061 static const struct httpd_cgi_call *calls[] = { &file, &tcp, &net, NULL };
00062 
00063 /*---------------------------------------------------------------------------*/
00064 static
00065 PT_THREAD(nullfunction(struct httpd_state *s, char *ptr))
00066 {
00067   PSOCK_BEGIN(&s->sout);
00068   PSOCK_END(&s->sout);
00069 }
00070 /*---------------------------------------------------------------------------*/
00071 httpd_cgifunction
00072 httpd_cgi(char *name)
00073 {
00074   const struct httpd_cgi_call **f;
00075 
00076   /* Find the matching name in the table, return the function. */
00077   for(f = calls; *f != NULL; ++f) {
00078     if(strncmp((*f)->name, name, strlen((*f)->name)) == 0) {
00079       return (*f)->function;
00080     }
00081   }
00082   return nullfunction;
00083 }
00084 /*---------------------------------------------------------------------------*/
00085 static unsigned short
00086 generate_file_stats(void *arg)
00087 {
00088   char *f = (char *)arg;
00089   return snprintf((char *)uip_appdata, UIP_APPDATA_SIZE, "%5u", httpd_fs_count(f));
00090 }
00091 /*---------------------------------------------------------------------------*/
00092 static
00093 PT_THREAD(file_stats(struct httpd_state *s, char *ptr))
00094 {
00095   PSOCK_BEGIN(&s->sout);
00096 
00097   PSOCK_GENERATOR_SEND(&s->sout, generate_file_stats, strchr(ptr, ' ') + 1);
00098   
00099   PSOCK_END(&s->sout);
00100 }
00101 /*---------------------------------------------------------------------------*/
00102 static const char closed[] =   /*  "CLOSED",*/
00103 {0x43, 0x4c, 0x4f, 0x53, 0x45, 0x44, 0};
00104 static const char syn_rcvd[] = /*  "SYN-RCVD",*/
00105 {0x53, 0x59, 0x4e, 0x2d, 0x52, 0x43, 0x56,
00106  0x44,  0};
00107 static const char syn_sent[] = /*  "SYN-SENT",*/
00108 {0x53, 0x59, 0x4e, 0x2d, 0x53, 0x45, 0x4e,
00109  0x54,  0};
00110 static const char established[] = /*  "ESTABLISHED",*/
00111 {0x45, 0x53, 0x54, 0x41, 0x42, 0x4c, 0x49, 0x53, 0x48,
00112  0x45, 0x44, 0};
00113 static const char fin_wait_1[] = /*  "FIN-WAIT-1",*/
00114 {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
00115  0x54, 0x2d, 0x31, 0};
00116 static const char fin_wait_2[] = /*  "FIN-WAIT-2",*/
00117 {0x46, 0x49, 0x4e, 0x2d, 0x57, 0x41, 0x49,
00118  0x54, 0x2d, 0x32, 0};
00119 static const char closing[] = /*  "CLOSING",*/
00120 {0x43, 0x4c, 0x4f, 0x53, 0x49,
00121  0x4e, 0x47, 0};
00122 static const char time_wait[] = /*  "TIME-WAIT,"*/
00123 {0x54, 0x49, 0x4d, 0x45, 0x2d, 0x57, 0x41,
00124  0x49, 0x54, 0};
00125 static const char last_ack[] = /*  "LAST-ACK"*/
00126 {0x4c, 0x41, 0x53, 0x54, 0x2d, 0x41, 0x43,
00127  0x4b, 0};
00128 
00129 static const char *states[] = {
00130   closed,
00131   syn_rcvd,
00132   syn_sent,
00133   established,
00134   fin_wait_1,
00135   fin_wait_2,
00136   closing,
00137   time_wait,
00138   last_ack};
00139   
00140 
00141 static unsigned short
00142 generate_tcp_stats(void *arg)
00143 {
00144   struct uip_conn *conn;
00145   struct httpd_state *s = (struct httpd_state *)arg;
00146     
00147   conn = &uip_conns[s->count];
00148   return snprintf((char *)uip_appdata, UIP_APPDATA_SIZE,
00149          "<tr><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",
00150          htons(conn->lport),
00151          htons(conn->ripaddr[0]) >> 8,
00152          htons(conn->ripaddr[0]) & 0xff,
00153          htons(conn->ripaddr[1]) >> 8,
00154          htons(conn->ripaddr[1]) & 0xff,
00155          htons(conn->rport),
00156          states[conn->tcpstateflags & UIP_TS_MASK],
00157          conn->nrtx,
00158          conn->timer,
00159          (uip_outstanding(conn))? '*':' ',
00160          (uip_stopped(conn))? '!':' ');
00161 }
00162 /*---------------------------------------------------------------------------*/
00163 static
00164 PT_THREAD(tcp_stats(struct httpd_state *s, char *ptr))
00165 {
00166   
00167   PSOCK_BEGIN(&s->sout);
00168 
00169   for(s->count = 0; s->count < UIP_CONNS; ++s->count) {
00170     if((uip_conns[s->count].tcpstateflags & UIP_TS_MASK) != UIP_CLOSED) {
00171       PSOCK_GENERATOR_SEND(&s->sout, generate_tcp_stats, s);
00172     }
00173   }
00174 
00175   PSOCK_END(&s->sout);
00176 }
00177 /*---------------------------------------------------------------------------*/
00178 static unsigned short
00179 generate_net_stats(void *arg)
00180 {
00181   struct httpd_state *s = (struct httpd_state *)arg;
00182   return snprintf((char *)uip_appdata, UIP_APPDATA_SIZE,
00183           "%5u\n", ((uip_stats_t *)&uip_stat)[s->count]);
00184 }
00185 
00186 static
00187 PT_THREAD(net_stats(struct httpd_state *s, char *ptr))
00188 {
00189   PSOCK_BEGIN(&s->sout);
00190 
00191 #if UIP_STATISTICS
00192 
00193   for(s->count = 0; s->count < sizeof(uip_stat) / sizeof(uip_stats_t);
00194       ++s->count) {
00195     PSOCK_GENERATOR_SEND(&s->sout, generate_net_stats, s);
00196   }
00197   
00198 #endif /* UIP_STATISTICS */
00199   
00200   PSOCK_END(&s->sout);
00201 }
00202 /*---------------------------------------------------------------------------*/
00203 /** @} */