SOEM/oshw/rtems/oshw.c

118 lines
2.7 KiB
C

/*
* Licensed under the GNU General Public License version 2 with exceptions. See
* LICENSE file in the project root for full license information
*/
#include <sys/ioctl.h>
#include <net/if.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "oshw.h"
/**
* Host to Network byte order (i.e. to big endian).
*
* Note that Ethercat uses little endian byte order, except for the Ethernet
* header which is big endian as usual.
*/
uint16 oshw_htons(uint16 host)
{
uint16 network = htons (host);
return network;
}
/**
* Network (i.e. big endian) to Host byte order.
*
* Note that Ethercat uses little endian byte order, except for the Ethernet
* header which is big endian as usual.
*/
uint16 oshw_ntohs(uint16 network)
{
uint16 host = ntohs (network);
return host;
}
/** Create list over available network adapters.
* @return First element in linked list of adapters
*/
ec_adaptert * oshw_find_adapters(void)
{
int i;
struct if_nameindex *ids;
ec_adaptert * adapter;
ec_adaptert * prev_adapter;
ec_adaptert * ret_adapter = NULL;
/* Iterate all devices and create a local copy holding the name and
* description.
*/
ids = if_nameindex ();
for(i = 0; ids[i].if_index != 0; i++)
{
adapter = (ec_adaptert *)malloc(sizeof(ec_adaptert));
/* If we got more than one adapter save link list pointer to previous
* adapter.
* Else save as pointer to return.
*/
if (i)
{
prev_adapter->next = adapter;
}
else
{
ret_adapter = adapter;
}
/* fetch description and name, in rtems we use the same on both */
adapter->next = NULL;
if (ids[i].if_name)
{
strncpy(adapter->name, ids[i].if_name, EC_MAXLEN_ADAPTERNAME);
adapter->name[EC_MAXLEN_ADAPTERNAME-1] = '\0';
strncpy(adapter->desc, ids[i].if_name, EC_MAXLEN_ADAPTERNAME);
adapter->desc[EC_MAXLEN_ADAPTERNAME-1] = '\0';
}
else
{
adapter->name[0] = '\0';
adapter->desc[0] = '\0';
}
prev_adapter = adapter;
}
if_freenameindex (ids);
return ret_adapter;
}
/** Free memory allocated memory used by adapter collection.
* @param[in] adapter = First element in linked list of adapters
* EC_NOFRAME.
*/
void oshw_free_adapters(ec_adaptert * adapter)
{
ec_adaptert * next_adapter;
/* Iterate the linked list and free all elements holding
* adapter information
*/
if(adapter)
{
next_adapter = adapter->next;
free (adapter);
while (next_adapter)
{
adapter = next_adapter;
next_adapter = adapter->next;
free (adapter);
}
}
}