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65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
/*
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* \brief Media access control (MAC) address
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* \author Martin Stein
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* \date 2016-06-22
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*/
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/*
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* Copyright (C) 2016-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _NET__MAC_ADDRESS_H_
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#define _NET__MAC_ADDRESS_H_
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/* OS includes */
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#include <util/string.h>
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#include <net/netaddress.h>
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namespace Net {
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struct Mac_address;
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static inline Genode::size_t ascii_to(char const *, Mac_address &);
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}
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struct Net::Mac_address : Net::Network_address<6, ':', true>
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{
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using Net::Network_address<6, ':', true>::Network_address;
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bool multicast() const { return addr[0] & 1; }
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};
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Genode::size_t Net::ascii_to(char const *s, Net::Mac_address &mac)
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{
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using namespace Genode;
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enum {
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HEX = true,
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MAC_CHAR_LEN = 17, /* 12 number and 6 colons */
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MAC_SIZE = 6,
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};
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if (Genode::strlen(s) < MAC_CHAR_LEN)
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throw -1;
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char mac_str[6];
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for (int i = 0; i < MAC_SIZE; i++) {
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int hi = i * 3;
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int lo = hi + 1;
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if (!is_digit(s[hi], HEX) || !is_digit(s[lo], HEX))
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throw -1;
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mac_str[i] = (char)((digit(s[hi], HEX) << 4) | digit(s[lo], HEX));
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}
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Genode::memcpy(mac.addr, mac_str, MAC_SIZE);
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return MAC_CHAR_LEN;
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}
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#endif /* _NET__MAC_ADDRESS_H_ */
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