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#include <errno.h>
#include <winsock2.h>
#include <wincrypt.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>
#include <ifaddrs.h>
#include <stdio.h>
#include "include/compat.h"
int getifaddrs(struct ifaddrs **ifap)
{
int ret = 0;
DWORD size, res = 0;
res = GetAdaptersAddresses(
AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX,
NULL, NULL, &size);
if (res != ERROR_BUFFER_OVERFLOW) {
errno = ENOMEM;
return -1;
}
PIP_ADAPTER_ADDRESSES adapter_addrs = (PIP_ADAPTER_ADDRESSES)malloc(size);
res = GetAdaptersAddresses(
AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX,
NULL, adapter_addrs, &size);
if (res != ERROR_SUCCESS) {
errno = ENOMEM;
return -1;
}
struct ifaddrs *out_list_head = NULL;
struct ifaddrs *out_list_curr;
for (PIP_ADAPTER_ADDRESSES curr_addrs = adapter_addrs;
curr_addrs != NULL;
curr_addrs = curr_addrs->Next) {
if (curr_addrs->OperStatus != 1)
continue;
for (PIP_ADAPTER_UNICAST_ADDRESS unicast_addrs = curr_addrs->FirstUnicastAddress;
unicast_addrs != NULL;
unicast_addrs = unicast_addrs->Next) {
SOCKADDR* unicast_sockaddr = unicast_addrs->Address.lpSockaddr;
if (unicast_sockaddr->sa_family != AF_INET &&
unicast_sockaddr->sa_family != AF_INET6)
continue;
out_list_curr = calloc(sizeof(*out_list_curr), 1);
if (!out_list_curr) {
errno = ENOMEM;
ret = -1;
goto out;
}
out_list_curr->ifa_next = out_list_head;
out_list_head = out_list_curr;
out_list_curr->ifa_flags = IFF_UP;
if (curr_addrs->IfType == IF_TYPE_SOFTWARE_LOOPBACK)
out_list_curr->ifa_flags |= IFF_LOOPBACK;
out_list_curr->ifa_addr = (struct sockaddr *) &out_list_curr->in_addrs;
out_list_curr->ifa_netmask = (struct sockaddr *) &out_list_curr->in_netmasks;
out_list_curr->ifa_name = out_list_curr->ad_name;
if (unicast_sockaddr->sa_family == AF_INET) {
ULONG subnet_mask = 0;
if (ConvertLengthToIpv4Mask(unicast_addrs->OnLinkPrefixLength, &subnet_mask)) {
errno = ENODATA;
ret = -1;
goto out;
}
struct sockaddr_in *addr4 = (struct sockaddr_in *) &out_list_curr->in_addrs;
struct sockaddr_in *netmask4 = (struct sockaddr_in *) &out_list_curr->in_netmasks;
netmask4->sin_family = unicast_sockaddr->sa_family;
addr4->sin_family = unicast_sockaddr->sa_family;
netmask4->sin_addr.S_un.S_addr = subnet_mask;
addr4->sin_addr = ((struct sockaddr_in*) unicast_sockaddr)->sin_addr;
} else {
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &out_list_curr->in_addrs;
(*addr6) = *(struct sockaddr_in6 *) unicast_sockaddr;
}
out_list_curr->speed = curr_addrs->TransmitLinkSpeed;
// TODO maybe use friendly name instead of adapter GUID
sprintf_s(out_list_curr->ad_name,
sizeof(out_list_curr->ad_name),
curr_addrs->AdapterName);
}
}
ret = 0;
out:
free(adapter_addrs);
if (ret && out_list_head)
free(out_list_head);
else if (ifap)
*ifap = out_list_head;
return ret;
}
void freeifaddrs(struct ifaddrs *ifa)
{
while (ifa) {
struct ifaddrs *next = ifa->ifa_next;
free(ifa);
ifa = next;
}
}
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