/*
* Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef OF_HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
# include <net/if.h>
#endif
#ifdef HAVE_NET_IF_ARP_H
# include <net/if_arp.h>
#endif
#ifdef HAVE_NET_IF_DL_H
# include <net/if_dl.h>
#endif
#ifdef HAVE_NET_IF_TYPES_H
# include <net/if_types.h>
#endif
#import "OFSystemInfo.h"
#import "OFSystemInfo+NetworkInterfaces.h"
#import "OFArray.h"
#import "OFData.h"
#import "OFDictionary.h"
#ifdef OF_HAVE_FILES
#import "OFFile.h"
#endif
#import "OFLocale.h"
#import "OFNumber.h"
#import "OFSocket.h"
#import "OFSocket+Private.h"
#import "OFString.h"
#import "OFInvalidFormatException.h"
#import "OFOpenItemFailedException.h"
@implementation OFSystemInfo (NetworkInterfaces)
static bool
queryNetworkInterfaceIndices(OFMutableDictionary *ret)
{
#ifdef HAVE_IF_NAMEINDEX
OFStringEncoding encoding = [OFLocale encoding];
struct if_nameindex *nameindex = if_nameindex();
if (nameindex == NULL)
return false;
@try {
for (size_t i = 0; nameindex[i].if_index != 0; i++) {
OFString *name = [OFString
stringWithCString: nameindex[i].if_name
encoding: encoding];
OFNumber *index = [OFNumber
numberWithUnsignedInt: nameindex[i].if_index];
OFMutableDictionary *interface =
[ret objectForKey: name];
if (interface == nil) {
interface = [OFMutableDictionary dictionary];
[ret setObject: interface forKey: name];
}
[interface setObject: index
forKey: OFNetworkInterfaceIndex];
}
} @finally {
if_freenameindex(nameindex);
}
return true;
#else
return false;
#endif
}
#if defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H)
static bool
queryNetworkInterfaceAddresses(OFMutableDictionary *ret,
OFNetworkInterfaceKey key, OFSocketAddressFamily addressFamily, int family,
size_t sockaddrSize)
{
OFStringEncoding encoding = [OFLocale encoding];
int sock = socket(family, SOCK_DGRAM, 0);
struct ifconf ifc;
struct ifreq *ifrs;
OFMutableDictionary *interface;
OFEnumerator *enumerator;
if (sock < 0)
return false;
ifrs = malloc(128 * sizeof(struct ifreq));
if (ifrs == NULL) {
closesocket(sock);
return false;
}
@try {
char *buffer;
memset(&ifc, 0, sizeof(ifc));
ifc.ifc_buf = (void *)ifrs;
ifc.ifc_len = 128 * sizeof(struct ifreq);
if (ioctl(sock, SIOCGIFCONF, &ifc) < 0)
return false;
buffer = ifc.ifc_buf;
while (buffer < (char *)ifc.ifc_buf + ifc.ifc_len) {
struct ifreq *current = (struct ifreq *)(void *)buffer;
OFString *name;
OFMutableData *addresses;
OFSocketAddress address;
if (current->ifr_addr.sa_family != family)
goto next;
name = [OFString stringWithCString: current->ifr_name
encoding: encoding];
if ((interface = [ret objectForKey: name]) == nil) {
interface = [OFMutableDictionary dictionary];
[ret setObject: interface forKey: name];
}
addresses = [interface objectForKey: key];
if (addresses == nil) {
addresses = [OFMutableData
dataWithItemSize: sizeof(OFSocketAddress)];
[interface setObject: addresses forKey: key];
}
memset(&address, 0, sizeof(address));
address.family = addressFamily;
memcpy(&address.sockaddr.in, ¤t->ifr_addr,
sockaddrSize);
[addresses addItem: &address];
next:
# ifdef _SIZEOF_ADDR_IFREQ
buffer += _SIZEOF_ADDR_IFREQ(*current);
# else
buffer += sizeof(struct ifreq);
# endif
}
} @finally {
free(ifrs);
closesocket(sock);
}
enumerator = [ret objectEnumerator];
while ((interface = [enumerator nextObject]) != nil)
[[interface objectForKey: key] makeImmutable];
return true;
}
#endif
static bool
queryNetworkInterfaceIPv4Addresses(OFMutableDictionary *ret)
{
#if defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H)
return queryNetworkInterfaceAddresses(ret,
OFNetworkInterfaceIPv4Addresses, OFSocketAddressFamilyIPv4,
AF_INET, sizeof(struct sockaddr_in));
#else
return false;
#endif
}
#ifdef OF_HAVE_IPV6
static bool
queryNetworkInterfaceIPv6Addresses(OFMutableDictionary *ret)
{
# if defined(OF_LINUX) && defined(OF_HAVE_FILES)
OFFile *file;
OFString *line;
OFMutableDictionary *interface;
OFEnumerator *enumerator;
@try {
file = [OFFile fileWithPath: @"/proc/net/if_inet6" mode: @"r"];
} @catch (OFOpenItemFailedException *e) {
return false;
}
while ((line = [file readLine]) != nil) {
OFArray *components = [line
componentsSeparatedByString: @" "
options: OFStringSkipEmptyComponents];
OFString *addressString, *name;
OFSocketAddress address;
OFMutableData *addresses;
if (components.count < 6)
continue;
addressString = [components objectAtIndex: 0];
name = [components objectAtIndex: 5];
if (addressString.length != 32)
continue;
if ((interface = [ret objectForKey: name]) == nil) {
interface = [OFMutableDictionary dictionary];
[ret setObject: interface forKey: name];
}
memset(&address, 0, sizeof(address));
address.family = OFSocketAddressFamilyIPv6;
for (size_t i = 0; i < 32; i += 2) {
unsigned long long byte;
@try {
byte = [[addressString
substringWithRange: OFMakeRange(i, 2)]
unsignedLongLongValueWithBase: 16];
} @catch (OFInvalidFormatException *e) {
goto next_line;
}
if (byte > 0xFF)
goto next_line;
address.sockaddr.in6.sin6_addr.s6_addr[i / 2] =
(unsigned char)byte;
}
if ((addresses = [interface
objectForKey: OFNetworkInterfaceIPv6Addresses]) == nil) {
addresses = [OFMutableData
dataWithItemSize: sizeof(OFSocketAddress)];
[interface setObject: addresses
forKey: OFNetworkInterfaceIPv6Addresses];
}
[addresses addItem: &address];
next_line:
continue;
}
enumerator = [ret objectEnumerator];
while ((interface = [enumerator nextObject]) != nil)
[[interface objectForKey: OFNetworkInterfaceIPv6Addresses]
makeImmutable];
return false;
# elif defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H)
return queryNetworkInterfaceAddresses(ret,
OFNetworkInterfaceIPv6Addresses, OFSocketAddressFamilyIPv6,
AF_INET6, sizeof(struct sockaddr_in6));
# else
return false;
# endif
}
#endif
#ifdef OF_HAVE_IPX
static bool
queryNetworkInterfaceIPXAddresses(OFMutableDictionary *ret)
{
# if defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H)
return queryNetworkInterfaceAddresses(ret,
OFNetworkInterfaceIPXAddresses, OFSocketAddressFamilyIPX,
AF_IPX, sizeof(struct sockaddr_ipx));
# else
return false;
# endif
}
#endif
#ifdef OF_HAVE_APPLETALK
static bool
queryNetworkInterfaceAppleTalkAddresses(OFMutableDictionary *ret)
{
# if defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H)
return queryNetworkInterfaceAddresses(ret,
OFNetworkInterfaceAppleTalkAddresses,
OFSocketAddressFamilyAppleTalk, AF_APPLETALK,
sizeof(struct sockaddr_at));
# else
return false;
# endif
}
#endif
static bool
queryNetworkInterfaceHardwareAddress(OFMutableDictionary *ret)
{
#if defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H) && defined(SIOCGIFHWADDR)
OFStringEncoding encoding = [OFLocale encoding];
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
return false;
for (OFString *name in ret) {
size_t nameLength = [name cStringLengthWithEncoding: encoding];
struct ifreq ifr;
OFData *hardwareAddress;
if (nameLength > IFNAMSIZ)
continue;
memset(&ifr, 0, sizeof(ifr));
memcpy(&ifr.ifr_name, [name cStringWithEncoding: encoding],
nameLength);
if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0)
continue;
if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER)
continue;
hardwareAddress = [OFData dataWithItems: ifr.ifr_hwaddr.sa_data
count: 6];
[[ret objectForKey: name]
setObject: hardwareAddress
forKey: OFNetworkInterfaceHardwareAddress];
}
return true;
#elif defined(HAVE_IOCTL) && defined(HAVE_NET_IF_H) && \
defined(HAVE_STRUCT_SOCKADDR_DL)
OFStringEncoding encoding = [OFLocale encoding];
int sock = socket(AF_INET, SOCK_DGRAM, 0);
struct ifconf ifc;
struct ifreq *ifrs;
if (sock < 0)
return false;
ifrs = malloc(128 * sizeof(struct ifreq));
if (ifrs == NULL) {
closesocket(sock);
return false;
}
@try {
char *buffer;
memset(&ifc, 0, sizeof(ifc));
ifc.ifc_buf = (void *)ifrs;
ifc.ifc_len = 128 * sizeof(struct ifreq);
if (ioctl(sock, SIOCGIFCONF, &ifc) < 0)
return false;
buffer = ifc.ifc_buf;
while (buffer < (char *)ifc.ifc_buf + ifc.ifc_len) {
struct ifreq *current = (struct ifreq *)(void *)buffer;
struct sockaddr_dl *sdl;
OFString *name;
OFMutableDictionary *interface;
OFData *hardwareAddress;
if (current->ifr_addr.sa_family != AF_LINK)
goto next;
sdl = (struct sockaddr_dl *)(void *)¤t->ifr_addr;
if (sdl->sdl_type != IFT_ETHER)
goto next;
name = [OFString stringWithCString: current->ifr_name
encoding: encoding];
if ((interface = [ret objectForKey: name]) == nil) {
interface = [OFMutableDictionary dictionary];
[ret setObject: interface forKey: name];
}
hardwareAddress = [OFData dataWithItems: LLADDR(sdl)
count: sdl->sdl_alen];
[interface
setObject: hardwareAddress
forKey: OFNetworkInterfaceHardwareAddress];
next:
# ifdef _SIZEOF_ADDR_IFREQ
buffer += _SIZEOF_ADDR_IFREQ(*current);
# else
buffer += sizeof(struct ifreq);
# endif
}
} @finally {
free(ifrs);
closesocket(sock);
}
return true;
#else
return false;
#endif
}
+ (OFDictionary OF_GENERIC(OFString *, OFNetworkInterface) *)networkInterfaces
{
void *pool = objc_autoreleasePoolPush();
OFMutableDictionary *ret = [OFMutableDictionary dictionary];
bool success = false;
OFEnumerator *enumerator;
OFMutableDictionary *interface;
success |= queryNetworkInterfaceIndices(ret);
success |= queryNetworkInterfaceIPv4Addresses(ret);
#ifdef OF_HAVE_IPV6
success |= queryNetworkInterfaceIPv6Addresses(ret);
#endif
#ifdef OF_HAVE_IPX
success |= queryNetworkInterfaceIPXAddresses(ret);
#endif
#ifdef OF_HAVE_APPLETALK
success |= queryNetworkInterfaceAppleTalkAddresses(ret);
#endif
success |= queryNetworkInterfaceHardwareAddress(ret);
if (!success) {
objc_autoreleasePoolPop(pool);
return nil;
}
enumerator = [ret objectEnumerator];
while ((interface = [enumerator nextObject]) != nil)
[interface makeImmutable];
[ret makeImmutable];
[ret retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
@end