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-rw-r--r--uip/apps/webserver/httpd.c338
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diff --git a/uip/apps/webserver/httpd.c b/uip/apps/webserver/httpd.c
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+++ b/uip/apps/webserver/httpd.c
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+/**
+ * \addtogroup apps
+ * @{
+ */
+
+/**
+ * \defgroup httpd Web server
+ * @{
+ * The uIP web server is a very simplistic implementation of an HTTP
+ * server. It can serve web pages and files from a read-only ROM
+ * filesystem, and provides a very small scripting language.
+
+ */
+
+/**
+ * \file
+ * Web server
+ * \author
+ * Adam Dunkels <adam@sics.se>
+ */
+
+
+/*
+ * Copyright (c) 2004, 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. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $
+ */
+
+#include "uip.h"
+#include "httpd.h"
+#include "httpd-fs.h"
+#include "httpd-cgi.h"
+#include "http-strings.h"
+
+#include <string.h>
+
+#define STATE_WAITING 0
+#define STATE_OUTPUT 1
+
+#define ISO_nl 0x0a
+#define ISO_space 0x20
+#define ISO_bang 0x21
+#define ISO_percent 0x25
+#define ISO_period 0x2e
+#define ISO_slash 0x2f
+#define ISO_colon 0x3a
+
+
+/*---------------------------------------------------------------------------*/
+static unsigned short
+generate_part_of_file(void *state)
+{
+ struct httpd_state *s = (struct httpd_state *)state;
+
+ if(s->file.len > uip_mss()) {
+ s->len = uip_mss();
+ } else {
+ s->len = s->file.len;
+ }
+ memcpy(uip_appdata, s->file.data, s->len);
+
+ return s->len;
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(send_file(struct httpd_state *s))
+{
+ PSOCK_BEGIN(&s->sout);
+
+ do {
+ PSOCK_GENERATOR_SEND(&s->sout, generate_part_of_file, s);
+ s->file.len -= s->len;
+ s->file.data += s->len;
+ } while(s->file.len > 0);
+
+ PSOCK_END(&s->sout);
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(send_part_of_file(struct httpd_state *s))
+{
+ PSOCK_BEGIN(&s->sout);
+
+ PSOCK_SEND(&s->sout, s->file.data, s->len);
+
+ PSOCK_END(&s->sout);
+}
+/*---------------------------------------------------------------------------*/
+static void
+next_scriptstate(struct httpd_state *s)
+{
+ char *p;
+ p = strchr(s->scriptptr, ISO_nl) + 1;
+ s->scriptlen -= (unsigned short)(p - s->scriptptr);
+ s->scriptptr = p;
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(handle_script(struct httpd_state *s))
+{
+ char *ptr;
+
+ PT_BEGIN(&s->scriptpt);
+
+
+ while(s->file.len > 0) {
+
+ /* Check if we should start executing a script. */
+ if(*s->file.data == ISO_percent &&
+ *(s->file.data + 1) == ISO_bang) {
+ s->scriptptr = s->file.data + 3;
+ s->scriptlen = s->file.len - 3;
+ if(*(s->scriptptr - 1) == ISO_colon) {
+ httpd_fs_open(s->scriptptr + 1, &s->file);
+ PT_WAIT_THREAD(&s->scriptpt, send_file(s));
+ } else {
+ PT_WAIT_THREAD(&s->scriptpt,
+ httpd_cgi(s->scriptptr)(s, s->scriptptr));
+ }
+ next_scriptstate(s);
+
+ /* The script is over, so we reset the pointers and continue
+ sending the rest of the file. */
+ s->file.data = s->scriptptr;
+ s->file.len = s->scriptlen;
+ } else {
+ /* See if we find the start of script marker in the block of HTML
+ to be sent. */
+
+ if(s->file.len > uip_mss()) {
+ s->len = uip_mss();
+ } else {
+ s->len = s->file.len;
+ }
+
+ if(*s->file.data == ISO_percent) {
+ ptr = strchr(s->file.data + 1, ISO_percent);
+ } else {
+ ptr = strchr(s->file.data, ISO_percent);
+ }
+ if(ptr != NULL &&
+ ptr != s->file.data) {
+ s->len = (int)(ptr - s->file.data);
+ if(s->len >= uip_mss()) {
+ s->len = uip_mss();
+ }
+ }
+ PT_WAIT_THREAD(&s->scriptpt, send_part_of_file(s));
+ s->file.data += s->len;
+ s->file.len -= s->len;
+
+ }
+ }
+
+ PT_END(&s->scriptpt);
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
+{
+ char *ptr;
+
+ PSOCK_BEGIN(&s->sout);
+
+ PSOCK_SEND_STR(&s->sout, statushdr);
+
+ ptr = strrchr(s->filename, ISO_period);
+ if(ptr == NULL) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_binary);
+ } else if(strncmp(http_html, ptr, 5) == 0 ||
+ strncmp(http_shtml, ptr, 6) == 0) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_html);
+ } else if(strncmp(http_css, ptr, 4) == 0) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_css);
+ } else if(strncmp(http_png, ptr, 4) == 0) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_png);
+ } else if(strncmp(http_gif, ptr, 4) == 0) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_gif);
+ } else if(strncmp(http_jpg, ptr, 4) == 0) {
+ PSOCK_SEND_STR(&s->sout, http_content_type_jpg);
+ } else {
+ PSOCK_SEND_STR(&s->sout, http_content_type_plain);
+ }
+ PSOCK_END(&s->sout);
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(handle_output(struct httpd_state *s))
+{
+ char *ptr;
+
+ PT_BEGIN(&s->outputpt);
+
+ if(!httpd_fs_open(s->filename, &s->file)) {
+ httpd_fs_open(http_404_html, &s->file);
+ strcpy(s->filename, http_404_html);
+ PT_WAIT_THREAD(&s->outputpt,
+ send_headers(s,
+ http_header_404));
+ PT_WAIT_THREAD(&s->outputpt,
+ send_file(s));
+ } else {
+ PT_WAIT_THREAD(&s->outputpt,
+ send_headers(s,
+ http_header_200));
+ ptr = strchr(s->filename, ISO_period);
+ if(ptr != NULL && strncmp(ptr, http_shtml, 6) == 0) {
+ PT_INIT(&s->scriptpt);
+ PT_WAIT_THREAD(&s->outputpt, handle_script(s));
+ } else {
+ PT_WAIT_THREAD(&s->outputpt,
+ send_file(s));
+ }
+ }
+ PSOCK_CLOSE(&s->sout);
+ PT_END(&s->outputpt);
+}
+/*---------------------------------------------------------------------------*/
+static
+PT_THREAD(handle_input(struct httpd_state *s))
+{
+ PSOCK_BEGIN(&s->sin);
+
+ PSOCK_READTO(&s->sin, ISO_space);
+
+
+ if(strncmp(s->inputbuf, http_get, 4) != 0) {
+ PSOCK_CLOSE_EXIT(&s->sin);
+ }
+ PSOCK_READTO(&s->sin, ISO_space);
+
+ if(s->inputbuf[0] != ISO_slash) {
+ PSOCK_CLOSE_EXIT(&s->sin);
+ }
+
+ if(s->inputbuf[1] == ISO_space) {
+ strncpy(s->filename, http_index_html, sizeof(s->filename));
+ } else {
+ s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
+ strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename));
+ }
+
+ /* httpd_log_file(uip_conn->ripaddr, s->filename);*/
+
+ s->state = STATE_OUTPUT;
+
+ while(1) {
+ PSOCK_READTO(&s->sin, ISO_nl);
+
+ if(strncmp(s->inputbuf, http_referer, 8) == 0) {
+ s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
+ /* httpd_log(&s->inputbuf[9]);*/
+ }
+ }
+
+ PSOCK_END(&s->sin);
+}
+/*---------------------------------------------------------------------------*/
+static void
+handle_connection(struct httpd_state *s)
+{
+ handle_input(s);
+ if(s->state == STATE_OUTPUT) {
+ handle_output(s);
+ }
+}
+/*---------------------------------------------------------------------------*/
+void
+httpd_appcall(void)
+{
+ struct httpd_state *s = (struct httpd_state *)&(uip_conn->appstate);
+
+ if(uip_closed() || uip_aborted() || uip_timedout()) {
+ } else if(uip_connected()) {
+ PSOCK_INIT(&s->sin, s->inputbuf, sizeof(s->inputbuf) - 1);
+ PSOCK_INIT(&s->sout, s->inputbuf, sizeof(s->inputbuf) - 1);
+ PT_INIT(&s->outputpt);
+ s->state = STATE_WAITING;
+ /* timer_set(&s->timer, CLOCK_SECOND * 100);*/
+ s->timer = 0;
+ handle_connection(s);
+ } else if(s != NULL) {
+ if(uip_poll()) {
+ ++s->timer;
+ if(s->timer >= 20) {
+ uip_abort();
+ }
+ } else {
+ s->timer = 0;
+ }
+ handle_connection(s);
+ } else {
+ uip_abort();
+ }
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Initialize the web server
+ *
+ * This function initializes the web server and should be
+ * called at system boot-up.
+ */
+void
+httpd_init(void)
+{
+ uip_listen(HTONS(80));
+}
+/*---------------------------------------------------------------------------*/
+/** @} */
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