From 0d9a111face4f3629bcae8e52af843792af3b453 Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Thu, 13 Sep 2012 10:41:16 -0400
Subject: Moving into firmwares directory.

---
 firmwares/wifishield/wifiHD/src/ard_utils.c | 196 ++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 firmwares/wifishield/wifiHD/src/ard_utils.c

(limited to 'firmwares/wifishield/wifiHD/src/ard_utils.c')

diff --git a/firmwares/wifishield/wifiHD/src/ard_utils.c b/firmwares/wifishield/wifiHD/src/ard_utils.c
new file mode 100644
index 0000000..9c31f40
--- /dev/null
+++ b/firmwares/wifishield/wifiHD/src/ard_utils.c
@@ -0,0 +1,196 @@
+/*
+ * ard_utils.c
+ *
+ *  Created on: Jul 4, 2010
+ *      Author: mlf by Metodo2 srl
+ */
+#undef _APP_DEBUG_
+
+#include "lwip/pbuf.h"
+#include "wifi_spi.h"
+#include "ard_utils.h"
+#include "debug.h"
+
+#define MAX_PBUF_STORED	30
+
+tData pBufStore[MAX_PBUF_STORED][MAX_SOCK_NUM];
+
+unsigned char headBuf = 0;
+unsigned char tailBuf = 0;
+
+#define IS_BUF_AVAIL() (tailBuf!=headBuf)
+#define IS_BUF_EMPTY() ((tailBuf == 0) && (headBuf == 0))
+
+void init_pBuf()
+{
+	memset(pBufStore, 0, sizeof(pBufStore));
+}
+
+void insert_pBuf(struct pbuf* q, uint8_t sock, void* _pcb)
+{
+	if (q == NULL)
+		return;
+
+	if (pBufStore[headBuf][sock].data != NULL)
+	{
+		WARN("Overwriting buffer %p idx:%d!\n", pBufStore[headBuf][sock].data, headBuf);
+		// to avoid memory leak free the oldest buffer
+		freetDataIdx(headBuf, sock);
+	}
+
+	u8_t* p = (u8_t*)calloc(q->tot_len,sizeof(u8_t));
+    if(p != NULL) {
+      if (pbuf_copy_partial(q, p, q->tot_len,0) != q->tot_len) {
+    	  WARN("pbuf_copy_partial failed: src:%p, dst:%p, len:%d\n", q, p, q->tot_len);
+    	  free(p);
+    	  p = NULL;
+    	  return;
+      }
+
+      pBufStore[headBuf][sock].data = p;
+      pBufStore[headBuf][sock].len = q->tot_len;
+      pBufStore[headBuf][sock].idx = 0;
+      pBufStore[headBuf][sock].pcb = _pcb;
+      headBuf++;
+
+  	  if (headBuf == MAX_PBUF_STORED)
+  		headBuf = 0;
+  	  if (headBuf == tailBuf)
+  		  WARN("Overwriting data [%d-%d]!\n", headBuf, tailBuf);
+  	  INFO_UTIL("Insert: %p:%d-%d [%d,%d]\n", p, q->tot_len, p[0], headBuf, tailBuf);
+    }
+}
+
+tData* get_pBuf(uint8_t sock)
+{
+	if (IS_BUF_EMPTY())
+		return NULL;
+
+	if (IS_BUF_AVAIL())
+	{
+		tData* p = &(pBufStore[tailBuf][sock]);
+		INFO_UTIL_VER("%p [%d,%d]\n", p, headBuf, tailBuf);
+		return p;
+	}
+	return NULL;
+}
+
+void freetData(void * buf, uint8_t sock)
+{
+	if (buf==NULL)
+	{
+		WARN("Buf == NULL!");
+		return;
+	}
+
+    pBufStore[tailBuf][sock].data = NULL;
+    pBufStore[tailBuf][sock].len = 0;
+    pBufStore[tailBuf][sock].idx = 0;
+    pBufStore[tailBuf][sock].pcb = 0;
+
+	if (++tailBuf == MAX_PBUF_STORED)
+		tailBuf = 0;
+	INFO_UTIL("%p [%d,%d]\n", buf, headBuf, tailBuf);
+	free(buf);
+}
+
+void freetDataIdx(uint8_t idxBuf, uint8_t sock)
+{
+	if (idxBuf >=MAX_PBUF_STORED)
+	{
+		WARN("idxBuf out of range: %d\n", idxBuf);
+		return;
+	}
+
+	void * buf = pBufStore[idxBuf][sock].data;
+
+	INFO_UTIL("%p idx:%d\n", buf, idxBuf);
+
+	free(buf);
+
+    pBufStore[idxBuf][sock].data = 0;
+    pBufStore[idxBuf][sock].len = 0;
+    pBufStore[idxBuf][sock].idx = 0;
+    pBufStore[idxBuf][sock].pcb = 0;
+}
+
+
+void ack_recved(void* pcb, int len);
+
+bool isAvailTcpDataByte(uint8_t sock)
+{
+	tData* p = get_pBuf(sock);
+
+	if (p != NULL)
+	{
+		INFO_UTIL_VER("check:%d %d %p\n",p->idx, p->len, p->data);
+		if (p->idx == p->len)
+		{
+			freetData(p->data, sock);
+			ack_recved(p->pcb, p->len);
+			INFO_UTIL("Free %p other buf %d tail:%d head:%d\n",
+					p->data, IS_BUF_AVAIL(), tailBuf, headBuf);
+			return (IS_BUF_AVAIL());
+		}else{
+			return true;
+		}
+	}
+	return false;
+}
+
+
+
+bool getTcpDataByte(uint8_t sock, uint8_t* payload, uint8_t peek)
+{
+	// ref field in struct pbuf has been used as index pointer for byte data
+	tData* p = get_pBuf(sock);
+
+	if (p != NULL)
+	{
+		if (p->idx < p->len)
+		{
+		uint8_t* buf = (uint8_t*)p->data;
+		if (peek)
+			*payload = buf[p->idx];
+		else
+			*payload = buf[p->idx++];
+		INFO_UTIL_VER("get:%d %p %d\n",p->idx, p->data, *payload);
+		return true;
+		}else{
+			//dealloc current buffer
+			INFO_UTIL("Free %p\n", p->data);
+			freetData(p->data, sock);
+			ack_recved(p->pcb, p->len);
+		}
+	}
+	return false;
+}
+
+bool getTcpData(uint8_t sock, void** payload, uint16_t* len)
+{
+	tData* p = NULL;
+	p = get_pBuf(sock);
+	if (p != NULL)
+	{
+		*payload = p->data;
+		*len = p->len;
+		return true;
+	}
+	return false;
+}
+
+bool freeTcpData(uint8_t sock)
+{
+	tData* p = NULL;
+	p = get_pBuf(sock);
+	if (p != NULL)
+	{
+		freetData(p->data, sock);
+		ack_recved(p->pcb, p->len);
+		return true;
+	}
+	return false;
+}
+
+
+
-- 
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