From 6f9272bdabcda81425ec1aaecf26a160535d4749 Mon Sep 17 00:00:00 2001
From: Joshua Wise <joshua@rebirth.joshuawise.com>
Date: Mon, 10 Nov 2008 23:35:23 -0500
Subject: [PATCH] Add httpd.

---
 aseg-paging/Makefile        |   2 +
 include/minilib.h           |   1 +
 lib/minilib.c               |  10 ++
 lwip/src/include/lwipopts.h |  37 +-----
 net/http/fs.c               |  96 ++++++++++++++
 net/http/fs.h               |  44 ++++++
 net/http/fsdata.c           |  14 ++
 net/http/fsdata.h           |  42 ++++++
 net/http/httpd.c            | 258 ++++++++++++++++++++++++++++++++++++
 net/http/httpd.h            |  37 ++++++
 net/net.c                   |   3 +
 11 files changed, 509 insertions(+), 35 deletions(-)
 create mode 100644 net/http/fs.c
 create mode 100644 net/http/fs.h
 create mode 100644 net/http/fsdata.c
 create mode 100644 net/http/fsdata.h
 create mode 100644 net/http/httpd.c
 create mode 100644 net/http/httpd.h

diff --git a/aseg-paging/Makefile b/aseg-paging/Makefile
index a8d72cd..2a50935 100644
--- a/aseg-paging/Makefile
+++ b/aseg-paging/Makefile
@@ -40,6 +40,8 @@ OBJS =	../ich2/smi.o \
 	../pci/pci-raw.o \
 	../pci/pci-bother.o \
 	../net/net.o \
+	../net/http/fs.o \
+	../net/http/httpd.o \
 	../net/3c90x.o \
 	../lib/minilib.o \
 	../lib/doprnt.o \
diff --git a/include/minilib.h b/include/minilib.h
index ef4f302..7d66efb 100644
--- a/include/minilib.h
+++ b/include/minilib.h
@@ -8,6 +8,7 @@ extern void memset(void *dest, int data, int bytes);
 extern void memmove(void *dest, void *src, int bytes);
 extern int memcmp(const char *a2, const char *a1, int bytes);
 extern int strcmp(const char *a2, const char *a1);
+extern int strncmp(const char *a2, const char *a1, int n);
 extern int strlen(const char *c);
 extern void strcpy(char *a2, const char *a1);
 extern void puts(const char *c);
diff --git a/lib/minilib.c b/lib/minilib.c
index c1d36b6..e90f7af 100644
--- a/lib/minilib.c
+++ b/lib/minilib.c
@@ -50,6 +50,16 @@ int strcmp (const char *a2, const char *a1) {
 	}
 }
 
+int strncmp (const char *a2, const char *a1, int n) {
+	while (n--) {
+		if (*a2 != *a1) return 1;
+		if (*a2 == 0) return 0;
+		a1++;
+		a2++;
+	}
+	return 0;
+}
+
 int strlen(const char *c)
 {
 	int l = 0;
diff --git a/lwip/src/include/lwipopts.h b/lwip/src/include/lwipopts.h
index 4ad4440..c2ef625 100644
--- a/lwip/src/include/lwipopts.h
+++ b/lwip/src/include/lwipopts.h
@@ -11,40 +11,7 @@
 
 #define LWIP_DHCP	1
 
-#undef LWIP_DEBUG
-
-#define ETHARP_DEBUG                    LWIP_DBG_ON
-#define NETIF_DEBUG                     LWIP_DBG_ON
-#define PBUF_DEBUG                      LWIP_DBG_ON
-#define API_LIB_DEBUG                   LWIP_DBG_OFF
-#define API_MSG_DEBUG                   LWIP_DBG_OFF
-#define SOCKETS_DEBUG                   LWIP_DBG_OFF
-#define ICMP_DEBUG                      LWIP_DBG_OFF
-#define IGMP_DEBUG                      LWIP_DBG_OFF
-#define INET_DEBUG                      LWIP_DBG_OFF
-#define IP_DEBUG                        LWIP_DBG_ON
-#define IP_REASS_DEBUG                  LWIP_DBG_OFF
-#define RAW_DEBUG                       LWIP_DBG_OFF
-#define MEM_DEBUG                       LWIP_DBG_ON
-#define MEMP_DEBUG                      LWIP_DBG_ON
-#define SYS_DEBUG                       LWIP_DBG_OFF
-#define TCP_DEBUG                       LWIP_DBG_ON
-#define TCP_INPUT_DEBUG                 LWIP_DBG_ON
-#define TCP_FR_DEBUG                    LWIP_DBG_OFF
-#define TCP_RTO_DEBUG                   LWIP_DBG_OFF
-#define TCP_CWND_DEBUG                  LWIP_DBG_OFF
-#define TCP_WND_DEBUG                   LWIP_DBG_OFF
-#define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
-#define TCP_RST_DEBUG                   LWIP_DBG_OFF
-#define TCP_QLEN_DEBUG                  LWIP_DBG_OFF
-#define UDP_DEBUG                       LWIP_DBG_OFF
-#define TCPIP_DEBUG                     LWIP_DBG_OFF
-#define PPP_DEBUG                       LWIP_DBG_OFF
-#define SLIP_DEBUG                      LWIP_DBG_OFF
-#define DHCP_DEBUG                      LWIP_DBG_OFF
-#define AUTOIP_DEBUG                    LWIP_DBG_OFF
-#define SNMP_MSG_DEBUG                  LWIP_DBG_OFF
-#define SNMP_MIB_DEBUG                  LWIP_DBG_OFF
-#define DNS_DEBUG                       LWIP_DBG_OFF
+#define MEM_SIZE	65536
+#define TCP_SND_BUF     2048
 
 #endif
diff --git a/net/http/fs.c b/net/http/fs.c
new file mode 100644
index 0000000..9e6358d
--- /dev/null
+++ b/net/http/fs.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * 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 lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#include "lwip/def.h"
+#include "fs.h"
+#include "fsdata.h"
+#include "fsdata.c"
+
+/*-----------------------------------------------------------------------------------*/
+
+void fill_regs(struct fs_file *file)
+{
+  static unsigned char buf[2048];
+  
+  sprintf(buf,
+    "<html><head><title>Registers</title></head><body>"
+    "<p>At the time you requested this page, the system's registers were:</p>"
+    "<tt><pre>"
+    "%%eax: 0x%08x    %%ebx: 0x%08x    %%ecx: 0x%08x    %%edx: 0x%08x\n"
+    "%%ebp: 0x%08x    %%esi: 0x%08x    %%edi: 0x%08x    %%esp: 0x%08x\n"
+    "%%cr0: 0x%08x    %%cr3: 0x%08x    %%eip: 0x%08x    %%eflags: 0x%08x\n"
+    "</pre></tt></body></html>",
+    *(unsigned long*)0xAFFD0,
+    *(unsigned long*)0xAFFDC,
+    *(unsigned long*)0xAFFD4,
+    *(unsigned long*)0xAFFD8,
+    *(unsigned long*)0xAFFE4,
+    *(unsigned long*)0xAFFE8,
+    *(unsigned long*)0xAFFEC,
+    *(unsigned long*)0xAFFE0,
+    *(unsigned long*)0xAFFFC,
+    *(unsigned long*)0xAFFF8,
+    *(unsigned long*)0xAFFF0,
+    *(unsigned long*)0xAFFF4);
+    
+  
+  file->data = buf;
+  file->len = strlen(buf);
+}
+
+
+/*-----------------------------------------------------------------------------------*/
+int
+fs_open(const char *name, struct fs_file *file)
+{
+  const struct fsdata_file *f;
+  
+  /* /registers.html is CGI */
+  if (!strcmp(name, "/registers.html"))
+  {
+    fill_regs(file);
+    return 1;
+  }
+
+  for(f = FS_ROOT;
+      f != NULL;
+      f = f->next) {
+    if (!strcmp(name, (const char*)f->name)) {
+      file->data = f->data;
+      file->len = f->len;
+      return 1;
+    }
+  }
+  file->data = "You clown...";
+  file->len = 9;
+  return 0;
+}
+/*-----------------------------------------------------------------------------------*/
diff --git a/net/http/fs.h b/net/http/fs.h
new file mode 100644
index 0000000..1f7d434
--- /dev/null
+++ b/net/http/fs.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * 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 lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __FS_H__
+#define __FS_H__
+
+struct fs_file {
+  const unsigned char *data;
+  int len;
+};
+
+/* file must be allocated by caller and will be filled in
+   by the function. */
+int fs_open(const char *name, struct fs_file *file);
+
+#endif /* __FS_H__ */
diff --git a/net/http/fsdata.c b/net/http/fsdata.c
new file mode 100644
index 0000000..7195a70
--- /dev/null
+++ b/net/http/fsdata.c
@@ -0,0 +1,14 @@
+static const unsigned char data_404_html[] =
+  "<html><head><title>404 Not Found</title></head>"
+  "<body><h1>404 Not Found</h1><p>This is probably not the machine you're looking for...</p></body>"
+  "</html>";
+
+static const unsigned char data_index_html[] =
+  "<html><head><title>NetWatch!</title></head>"
+  "<body><h1>NetWatch!</h1><iframe src=\"registers.html\" height=300></body>"
+  "</html>";
+
+const struct fsdata_file file_404_html[] = {{NULL, "/404.html", data_404_html, sizeof(data_404_html)}};
+const struct fsdata_file file_index_html[] = {{file_404_html, "/index.html", data_index_html, sizeof(data_index_html)}};
+
+#define FS_ROOT file_index_html
diff --git a/net/http/fsdata.h b/net/http/fsdata.h
new file mode 100644
index 0000000..a6c5262
--- /dev/null
+++ b/net/http/fsdata.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * 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 lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __FSDATA_H__
+#define __FSDATA_H__
+
+struct fsdata_file {
+  const struct fsdata_file *next;
+  const unsigned char *name;
+  const unsigned char *data;
+  const int len;
+};
+
+#endif /* __FSDATA_H__ */
diff --git a/net/http/httpd.c b/net/http/httpd.c
new file mode 100644
index 0000000..e8cdd53
--- /dev/null
+++ b/net/http/httpd.c
@@ -0,0 +1,258 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * 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 lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include <minilib.h>
+#include <output.h>
+#include "lwip/debug.h"
+
+#include "lwip/stats.h"
+
+#include "httpd.h"
+
+#include "lwip/tcp.h"
+
+#include "fs.h"
+
+struct http_state {
+  u32_t left;
+  const unsigned char *file;
+  u8_t retries;
+};
+
+/*-----------------------------------------------------------------------------------*/
+static void
+conn_err(void *arg, err_t err)
+{
+  struct http_state *hs;
+
+  LWIP_UNUSED_ARG(err);
+
+  hs = arg;
+  mem_free(hs);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+close_conn(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  tcp_arg(pcb, NULL);
+  tcp_sent(pcb, NULL);
+  tcp_recv(pcb, NULL);
+  mem_free(hs);
+  tcp_close(pcb);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+send_data(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  err_t err;
+  u16_t len;
+
+  /* We cannot send more data than space available in the send
+     buffer. */     
+  if (tcp_sndbuf(pcb) < hs->left) {
+    len = tcp_sndbuf(pcb);
+  } else {
+    len = hs->left;
+    LWIP_ASSERT((len == hs->left), "hs->left did not fit into u16_t!");
+  }
+
+  do {
+    err = tcp_write(pcb, hs->file, len, 0);
+    if (err == ERR_MEM) {
+      outputf("Insufficient memory to send %d", len);
+      len /= 2;
+    }
+  } while (err == ERR_MEM && len > 1);  
+  
+  if (err == ERR_OK) {
+    hs->file += len;
+    hs->left -= len;
+      } else {
+    outputf("send_data: error %s len %d %d\n", lwip_strerr(err), len, tcp_sndbuf(pcb));
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_poll(void *arg, struct tcp_pcb *pcb)
+{
+  struct http_state *hs;
+
+  hs = arg;
+  
+  /*  printf("Polll\n");*/
+  if (hs == NULL) {
+    /*    printf("Null, close\n");*/
+    tcp_abort(pcb);
+    return ERR_ABRT;
+  } else {
+    ++hs->retries;
+    if (hs->retries == 4) {
+      tcp_abort(pcb);
+      return ERR_ABRT;
+    }
+    send_data(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct http_state *hs;
+
+  LWIP_UNUSED_ARG(len);
+
+  hs = arg;
+
+  hs->retries = 0;
+  
+  if (hs->left > 0) {    
+    send_data(pcb, hs);
+  } else {
+    close_conn(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  int i;
+  char *data;
+  struct fs_file file;
+  struct http_state *hs;
+
+  hs = arg;
+
+  if (err == ERR_OK && p != NULL) {
+
+    /* Inform TCP that we have taken the data. */
+    tcp_recved(pcb, p->tot_len);
+    
+    if (hs->file == NULL) {
+      data = p->payload;
+      
+      if (strncmp(data, "GET ", 4) == 0) {
+        for(i = 0; i < 40; i++) {
+          if (((char *)data + 4)[i] == ' ' ||
+             ((char *)data + 4)[i] == '\r' ||
+             ((char *)data + 4)[i] == '\n') {
+            ((char *)data + 4)[i] = 0;
+          }
+        }
+        
+        outputf("httpd: serving %s", (char*)data+4);
+
+        if (*(char *)(data + 4) == '/' &&
+           *(char *)(data + 5) == 0) {
+          fs_open("/index.html", &file);
+        } else if (!fs_open((char *)data + 4, &file)) {
+          fs_open("/404.html", &file);
+        }
+
+        hs->file = file.data;
+        LWIP_ASSERT((file.len >= 0), "File length must be positive!");
+        hs->left = file.len;
+        
+        pbuf_free(p);
+        send_data(pcb, hs);
+
+        /* Tell TCP that we wish be to informed of data that has been
+           successfully sent by a call to the http_sent() function. */
+        tcp_sent(pcb, http_sent);
+      } else {
+        pbuf_free(p);
+        close_conn(pcb, hs);
+      }
+    } else {
+      pbuf_free(p);
+    }
+  }
+
+  if (err == ERR_OK && p == NULL) {
+    close_conn(pcb, hs);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+static err_t
+http_accept(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct http_state *hs;
+
+  LWIP_UNUSED_ARG(arg);
+  LWIP_UNUSED_ARG(err);
+
+  tcp_setprio(pcb, TCP_PRIO_MIN);
+  
+  /* Allocate memory for the structure that holds the state of the
+     connection. */
+  hs = (struct http_state *)mem_malloc(sizeof(struct http_state));
+
+  if (hs == NULL) {
+    outputf("http_accept: Out of memory\n");
+    return ERR_MEM;
+  }
+  
+  /* Initialize the structure. */
+  hs->file = NULL;
+  hs->left = 0;
+  hs->retries = 0;
+  
+  /* Tell TCP that this is the structure we wish to be passed for our
+     callbacks. */
+  tcp_arg(pcb, hs);
+
+  /* Tell TCP that we wish to be informed of incoming data by a call
+     to the http_recv() function. */
+  tcp_recv(pcb, http_recv);
+
+  tcp_err(pcb, conn_err);
+  
+  tcp_poll(pcb, http_poll, 4);
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+httpd_init(void)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = tcp_new();
+  tcp_bind(pcb, IP_ADDR_ANY, 80);
+  pcb = tcp_listen(pcb);
+  tcp_accept(pcb, http_accept);
+}
+/*-----------------------------------------------------------------------------------*/
+
diff --git a/net/http/httpd.h b/net/http/httpd.h
new file mode 100644
index 0000000..4602fd4
--- /dev/null
+++ b/net/http/httpd.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * 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 lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __HTTPD_H__
+#define __HTTPD_H__
+
+void httpd_init(void);
+
+#endif /* __HTTPD_H__ */
diff --git a/net/net.c b/net/net.c
index f920dbc..8390f04 100644
--- a/net/net.c
+++ b/net/net.c
@@ -154,8 +154,11 @@ int eth_register(struct nic *nic)
 
 void eth_init()
 {
+	extern void httpd_init();
+	
 	/* Required for DMA to work. :( */
 	smram_tseg_set_state(SMRAM_TSEG_OPEN);
 	lwip_init();
 	pci_probe_driver(a3c90x_driver);
+	httpd_init();
 }
-- 
2.43.0