genode/os/include/nic/xml_node.h
Stefan Kalkowski d3902e8538 Make nic_bridge's MAC address range configurable
By adding a "mac=XX:XX:XX:XX:XX:XX" attribute/value pair to the nic_bridge's
configuration one can define the first MAC address from which the nic_brigde
will allocate MACs for it's clients. Note: that the least relevant byte will
be ignored, and ranges from 0-255. Fixes #424.
2012-10-24 16:39:02 +02:00

57 lines
1.2 KiB
C++

/*
* \brief Xml-node routines used internally in NIC drivers
* \author Sebastian Sumpf
* \author Stefan Kalkowski
* \date 2012-10-22
*/
/*
* Copyright (C) 2012 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__NIC__XML_NODE_H_
#define _INCLUDE__NIC__XML_NODE_H_
#include <nic_session/nic_session.h>
#include <util/string.h>
namespace Genode {
/**
* Convert ASCII string to mac address
*/
template <>
inline size_t ascii_to<Nic::Mac_address>(char const *s,
Nic::Mac_address* mac, unsigned)
{
enum {
HEX = true,
MAC_CHAR_LEN = 17, /* 12 number and 6 colons */
MAC_SIZE = 6,
};
if(strlen(s) < MAC_CHAR_LEN)
throw -1;
char mac_str[6];
for (int i = 0; i < MAC_SIZE; i++) {
int hi = i * 3;
int lo = hi + 1;
if (!is_digit(s[hi], HEX) || !is_digit(s[lo], HEX))
throw -1;
mac_str[i] = (digit(s[hi], HEX) << 4) | digit(s[lo], HEX);
}
Genode::memcpy(mac->addr, mac_str, MAC_SIZE);
return MAC_CHAR_LEN;
}
}
#endif /* _INCLUDE__NIC__XML_NODE_H_ */