network: add generic ethernet module.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4459 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cfg/cfg_eth.h b/bertos/cfg/cfg_eth.h
new file mode 100644 (file)
index 0000000..a378808
--- /dev/null
+++ b/bertos/cfg/cfg_eth.h
@@ -0,0 +1,57 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ *
+ * \brief Configuration file for the generic ethernet driver module
+ */
+
+#ifndef CFG_ETH_H
+#define CFG_ETH_H
+
+/**
+ * Module logging level.
+ *
+ * $WIZ$ type = "enum"
+ * $WIZ$ value_list = "log_level"
+ */
+#define ETH_LOG_LEVEL      LOG_LVL_WARN
+
+/**
+ * module logging format.
+ *
+ * $WIZ$ type = "enum"
+ * $WIZ$ value_list = "log_format"
+ */
+#define ETH_LOG_FORMAT     LOG_FMT_TERSE
+
+#endif /* CFG_ETH_H */

diff --git a/bertos/drv/eth.h b/bertos/drv/eth.h
new file mode 100644 (file)
index 0000000..a5f0c2d
--- /dev/null
+++ b/bertos/drv/eth.h
@@ -0,0 +1,128 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ *
+ * \brief Ethernet standard descriptors
+ *
+ * $WIZ$ module_name = "eth"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_eth.h"
+ * $WIZ$ module_supports = "at91"
+ */
+
+#ifndef DRV_ETH_H
+#define DRV_ETH_H
+
+#include <cpu/types.h>
+
+#define ETH_ADDR_LEN   6
+#define ETH_HEAD_LEN   14
+#define ETH_DATA_LEN   1500
+#define ETH_FRAME_LEN  (ETH_HEAD_LEN + ETH_DATA_LEN)
+
+#define ETH_TYPE_IP    0x0800
+
+typedef union Ethernet
+{
+       struct
+       {
+               uint8_t  dst[ETH_ADDR_LEN];
+               uint8_t  src[ETH_ADDR_LEN];
+               uint16_t type;
+               uint8_t data[0];
+       };
+       uint8_t raw[ETH_FRAME_LEN];
+} PACKED Ethernet;
+
+/**
+ * Determine if ethernet address \a addr is a all zero.
+ */
+INLINE int eth_addrIsZero(const uint8_t *addr)
+{
+       return !(addr[0] | addr[1] | addr[2] |
+                addr[3] | addr[4] | addr[5]);
+}
+
+/**
+ * Determine if ethernet address \a addr is a multicast address.
+ */
+INLINE int eth_addrIsMcast(const uint8_t *addr)
+{
+       return (0x01 & addr[0]);
+}
+
+/**
+ * Determine if ethernet address \a addr is locally-assigned (IEEE 802).
+ */
+INLINE int eth_addrIsLocal(const uint8_t *addr)
+{
+       return (0x02 & addr[0]);
+}
+
+/**
+ * Determine if ethernet address \a addr is broadcast.
+ */
+INLINE bool eth_addrIsBcast(const uint8_t *addr)
+{
+       return (addr[0] & addr[1] & addr[2] &
+               addr[3] & addr[4] & addr[5]) == 0xff;
+}
+
+/**
+ * Check if the ethernet address \a addr is not all zero, is not a multicast
+ * address, and is not broadcast.
+ */
+INLINE bool eth_addrIsValid(const uint8_t *addr)
+{
+       return !eth_addrIsMcast(addr) && !eth_addrIsZero(addr);
+}
+
+/**
+ * Compare two ethernet addresses: \a addr1 and \a addr2, returns 0 if equal.
+ */
+INLINE bool eth_addrCmp(const uint8_t *addr1, const uint8_t *addr2)
+{
+       return !!((addr1[0] ^ addr2[0]) |
+                       (addr1[1] ^ addr2[1]) |
+                       (addr1[2] ^ addr2[2]) |
+                       (addr1[3] ^ addr2[3]) |
+                       (addr1[4] ^ addr2[4]) |
+                       (addr1[5] ^ addr2[5]));
+}
+
+ssize_t eth_send(const uint8_t *buf, size_t len);
+ssize_t eth_recv(uint8_t *buf, size_t len);
+int eth_init(void);
+
+extern uint8_t mac_addr[ETH_ADDR_LEN];
+
+#endif /* DRV_ETH_H */