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/*
* arp-win32.c
*
* Copyright (c) 2002 Dug Song <dugsong@monkey.org>
*
* $Id: arp-win32.c 539 2005-01-23 07:36:54Z dugsong $
*/
#ifdef _WIN32
#include "dnet_winconfig.h"
#else
#include "config.h"
#endif
#include <ws2tcpip.h>
#include <iphlpapi.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "dnet.h"
struct arp_handle {
MIB_IPNET_TABLE2 *iptable;
};
arp_t *
arp_open(void)
{
return (calloc(1, sizeof(arp_t)));
}
int
arp_add(arp_t *arp, const struct arp_entry *entry)
{
MIB_IPFORWARDROW ipfrow;
MIB_IPNETROW iprow;
if (GetBestRoute(entry->arp_pa.addr_ip,
IP_ADDR_ANY, &ipfrow) != NO_ERROR)
return (-1);
iprow.dwIndex = ipfrow.dwForwardIfIndex;
iprow.dwPhysAddrLen = ETH_ADDR_LEN;
memcpy(iprow.bPhysAddr, &entry->arp_ha.addr_eth, ETH_ADDR_LEN);
iprow.dwAddr = entry->arp_pa.addr_ip;
iprow.dwType = 4; /* XXX - static */
if (CreateIpNetEntry(&iprow) != NO_ERROR)
return (-1);
return (0);
}
int
arp_delete(arp_t *arp, const struct arp_entry *entry)
{
MIB_IPFORWARDROW ipfrow;
MIB_IPNETROW iprow;
if (GetBestRoute(entry->arp_pa.addr_ip,
IP_ADDR_ANY, &ipfrow) != NO_ERROR)
return (-1);
memset(&iprow, 0, sizeof(iprow));
iprow.dwIndex = ipfrow.dwForwardIfIndex;
iprow.dwAddr = entry->arp_pa.addr_ip;
if (DeleteIpNetEntry(&iprow) != NO_ERROR) {
errno = ENXIO;
return (-1);
}
return (0);
}
static int
_arp_get_entry(const struct arp_entry *entry, void *arg)
{
struct arp_entry *e = (struct arp_entry *)arg;
if (addr_cmp(&entry->arp_pa, &e->arp_pa) == 0) {
memcpy(&e->arp_ha, &entry->arp_ha, sizeof(e->arp_ha));
return (1);
}
return (0);
}
int
arp_get(arp_t *arp, struct arp_entry *entry)
{
if (arp_loop(arp, _arp_get_entry, entry) != 1) {
errno = ENXIO;
SetLastError(ERROR_NO_DATA);
return (-1);
}
return (0);
}
int
arp_loop(arp_t *arp, arp_handler callback, void *arg)
{
struct arp_entry entry;
int ret;
if (arp->iptable)
FreeMibTable(arp->iptable);
ret = GetIpNetTable2(AF_UNSPEC, &arp->iptable);
switch (ret) {
case NO_ERROR:
break;
case ERROR_NOT_FOUND:
return 0;
break;
default:
return -1;
break;
}
entry.arp_ha.addr_type = ADDR_TYPE_ETH;
entry.arp_ha.addr_bits = ETH_ADDR_BITS;
for (ULONG i = 0; i < arp->iptable->NumEntries; i++) {
MIB_IPNET_ROW2 *row = &arp->iptable->Table[i];
if (row->PhysicalAddressLength != ETH_ADDR_LEN ||
row->IsUnreachable ||
row->State < NlnsReachable)
continue;
switch (row->Address.si_family) {
case AF_INET:
entry.arp_pa.addr_type = ADDR_TYPE_IP;
entry.arp_pa.addr_bits = IP_ADDR_BITS;
entry.arp_pa.addr_ip = row->Address.Ipv4.sin_addr.S_un.S_addr;
break;
case AF_INET6:
entry.arp_pa.addr_type = ADDR_TYPE_IP6;
entry.arp_pa.addr_bits = IP6_ADDR_BITS;
memcpy(&entry.arp_pa.addr_ip6,
row->Address.Ipv6.sin6_addr.u.Byte, IP6_ADDR_LEN);
break;
default:
continue;
break;
}
memcpy(&entry.arp_ha.addr_eth,
row->PhysicalAddress, ETH_ADDR_LEN);
if ((ret = (*callback)(&entry, arg)) != 0)
return (ret);
}
return (0);
}
arp_t *
arp_close(arp_t *arp)
{
if (arp != NULL) {
if (arp->iptable != NULL)
FreeMibTable(arp->iptable);
free(arp);
}
return (NULL);
}
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