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Drop broken/unused routing table code (#350)

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Davide De Rosa 2023-12-13 22:04:06 +01:00 committed by GitHub
parent f56dfa313c
commit b885689d8e
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5 changed files with 0 additions and 1124 deletions
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162
Sources/CTunnelKitCore/RoutingTable.m
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@ -1,162 +0,0 @@
//
// RoutingTable.m
// TunnelKit
//
// Created by Davide De Rosa on 4/30/19.
// Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of TunnelKit.
//
// TunnelKit is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TunnelKit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
//
#import <sys/sysctl.h>
#import "route.h"
#import "RoutingTable.h"
#import "Allocation.h"
// adapted from: https://github.com/jianpx/ios-cabin
@interface RoutingTableEntry ()
- (instancetype)initWithRTM:(const struct rt_msghdr2 *)rtm;
@end
#pragma mark -
@interface RoutingTable ()
@property (nonatomic, strong) NSArray<RoutingTableEntry *> *ipv4;
@property (nonatomic, strong) NSArray<RoutingTableEntry *> *ipv6;
@end
@implementation RoutingTable
- (instancetype)init
{
if (!(self = [super init])) {
return nil;
}
int mib[] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_DUMP2, 0 };
const int mibLen = sizeof(mib) / sizeof(int);
size_t len;
if (sysctl(mib, mibLen, NULL, &len, NULL, 0) || (len <= 0)) {
return nil;
}
char *buf = allocate_safely(len);
if (!buf) {
return nil;
}
if (sysctl(mib, mibLen, buf, &len, NULL, 0)) {
free(buf);
return nil;
}
NSMutableArray<RoutingTableEntry *> *entries4 = [[NSMutableArray alloc] init];
NSMutableArray<RoutingTableEntry *> *entries6 = [[NSMutableArray alloc] init];
for (const char *ptr = buf; ptr < buf + len;) {
const struct rt_msghdr2 *rtm = (struct rt_msghdr2 *)ptr;
if (rtm->rtm_addrs & RTA_DST) {
struct sockaddr *dst_sa = (struct sockaddr *)(rtm + 1); // XXX: why +1 ?!?
if (((dst_sa->sa_family == AF_INET) || (dst_sa->sa_family == AF_INET6)) && !((rtm->rtm_flags & RTF_WASCLONED) && (rtm->rtm_parentflags & RTF_PRCLONING))) {
RoutingTableEntry *entry = [[RoutingTableEntry alloc] initWithRTM:rtm];
if (!entry) {
continue;
}
if (dst_sa->sa_family == AF_INET) {
[entries4 addObject:entry];
} else if (dst_sa->sa_family == AF_INET6) {
[entries6 addObject:entry];
}
}
}
ptr += rtm->rtm_msglen;
}
free(buf);
self.ipv4 = entries4;
self.ipv6 = entries6;
return self;
}
- (RoutingTableEntry *)defaultGateway4
{
for (RoutingTableEntry *entry in self.ipv4) {
if ([entry isDefault]) {
return entry;
}
}
return nil;
}
- (RoutingTableEntry *)defaultGateway6
{
for (RoutingTableEntry *entry in self.ipv6) {
if ([entry isDefault]) {
return entry;
}
}
return nil;
}
- (RoutingTableEntry *)broadestRoute4MatchingDestination:(NSString *)destination
{
RoutingTableEntry *defaultRoute;
RoutingTableEntry *minRoute;
NSInteger minPrefix = 32 + 1;
for (RoutingTableEntry *route in self.ipv4) {
if ([route isDefault]) { // leave last
defaultRoute = route;
continue;
}
if ([route matchesDestination:destination] && route.prefix < minPrefix) {
minRoute = route;
minPrefix = route.prefix;
}
}
return minRoute ?: defaultRoute;
}
- (RoutingTableEntry *)broadestRoute6MatchingDestination:(NSString *)destination
{
RoutingTableEntry *defaultRoute;
RoutingTableEntry *minRoute;
NSInteger minPrefix = 128 + 1;
for (RoutingTableEntry *route in self.ipv6) {
if ([route isDefault]) { // leave last
defaultRoute = route;
continue;
}
if ([route matchesDestination:destination] && route.prefix < minPrefix) {
minRoute = route;
minPrefix = route.prefix;
}
}
return minRoute ?: defaultRoute;
}
@end

614
Sources/CTunnelKitCore/RoutingTableEntry.m
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@ -1,614 +0,0 @@
//
// RoutingTableEntry.m
// TunnelKit
//
// Created by Davide De Rosa on 4/30/19.
// Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of TunnelKit.
//
// TunnelKit is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TunnelKit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
//
#import <arpa/inet.h>
#import <netdb.h>
#import <net/if.h>
#import "route.h"
#import "RoutingTableEntry.h"
#define ASSERT_PRINTF(r) NSCAssert(r >= 0, @"*printf() failed")
#define ASSERT_GETNAMEINFO(r) NSCAssert(r == 0, @"getnameinfo() failed")
// adapted from: https://github.com/jianpx/ios-cabin
#define ROUNDUP(a) ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t))
typedef union {
uint32_t dummy;
struct sockaddr u_sa;
u_short u_data[128];
} sa_u;
static uint32_t RoutingTableEntryAddress4(NSString *string);
static NSData *RoutingTableEntryAddress6(NSString *string);
static NSString *RoutingTableEntryName(struct sockaddr *sa, struct sockaddr *mask, int flags);
#pragma mark -
@interface RoutingTableEntry ()
@property (nonatomic, assign) BOOL isIPv6;
@property (nonatomic, copy) NSString *network;
@property (nonatomic, assign) NSInteger prefix;
@property (nonatomic, copy) NSString *gateway;
@property (nonatomic, copy) NSString *networkInterface;
@end
@implementation RoutingTableEntry
- (instancetype)initWithNetwork:(NSString *)network prefix:(NSInteger)prefix gateway:(NSString *)gateway networkInterface:(NSString *)networkInterface
{
if (!(self = [super init])) {
return nil;
}
self.network = network;
self.prefix = prefix;
self.gateway = gateway;
self.networkInterface = networkInterface;
return self;
}
- (instancetype)initWithIPv4Network:(NSString *)network gateway:(NSString *)gateway networkInterface:(NSString *)networkInterface
{
NSInteger prefix = 0;
NSArray<NSString *> *networkComps = [network componentsSeparatedByString:@"/"];
network = networkComps.firstObject;
if (networkComps.count == 2) {
prefix = [networkComps.lastObject integerValue];
NSAssert(prefix >= 0 && prefix <= 32, @"IPv4 prefix must lie in [0..32]");
} else {
prefix = 32;
}
NSMutableArray<NSString *> *groups = [[network componentsSeparatedByString:@"."] mutableCopy];
if (![network isEqualToString:@"default"]) {
if (prefix == 32) {
prefix = 8 * groups.count;
}
for (NSInteger i = groups.count; i < 4; ++i) {
[groups addObject:@"0"];
}
network = [groups componentsJoinedByString:@"."];
}
if (!(self = [self initWithNetwork:network prefix:prefix gateway:gateway networkInterface:networkInterface])) {
return nil;
}
self.isIPv6 = NO;
return self;
}
- (instancetype)initWithIPv6Network:(NSString *)network gateway:(NSString *)gateway networkInterface:(NSString *)networkInterface
{
NSInteger prefix = 0;
NSArray<NSString *> *networkComps = [network componentsSeparatedByString:@"/"];
network = networkComps.firstObject;
if (networkComps.count == 2) {
prefix = [networkComps.lastObject integerValue];
NSAssert(prefix >= 0 && prefix <= 128, @"IPv6 prefix must lie in [0..128]");
} else {
prefix = 128;
}
network = [[network componentsSeparatedByString:@"%"] firstObject];
gateway = [[gateway componentsSeparatedByString:@"%"] firstObject];
if (!(self = [self initWithNetwork:network prefix:prefix gateway:gateway networkInterface:networkInterface])) {
return nil;
}
self.isIPv6 = YES;
return self;
}
- (instancetype)initWithRTM:(const struct rt_msghdr2 *)rtm
{
NSParameterAssert(rtm);
NSString *network;
NSString *gateway;
NSString *networkInterface;
struct sockaddr *rti_info[RTAX_MAX];
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
for (int i = 0; i < RTAX_MAX; ++i) {
if (rtm->rtm_addrs & (1 << i)) {
rti_info[i] = sa;
sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
} else {
rti_info[i] = NULL;
}
}
// network
sa_u destinationStruct, destinationNetmask;
bzero(&destinationStruct, sizeof(destinationStruct));
if (rtm->rtm_addrs & RTA_DST) {
bcopy(rti_info[RTAX_DST], &destinationStruct, rti_info[RTAX_DST]->sa_len);
}
bzero(&destinationNetmask, sizeof(destinationNetmask));
if (rtm->rtm_addrs & RTA_NETMASK) {
bcopy(rti_info[RTAX_NETMASK], &destinationNetmask, rti_info[RTAX_NETMASK]->sa_len);
}
network = RoutingTableEntryName(&destinationStruct.u_sa, &destinationNetmask.u_sa, rtm->rtm_flags);
// gateway
sa_u gatewayStruct;
bzero(&gatewayStruct, sizeof(gatewayStruct));
if (rtm->rtm_addrs & RTA_GATEWAY) {
bcopy(rti_info[RTAX_GATEWAY], &gatewayStruct, rti_info[RTAX_GATEWAY]->sa_len);
}
gateway = RoutingTableEntryName(rti_info[RTAX_GATEWAY], NULL, RTF_HOST);
// network interface
char networkInterfaceStr[IF_NAMESIZE];
const char *networkInterfaceName = if_indextoname(rtm->rtm_index, networkInterfaceStr);
if (networkInterfaceName) {
networkInterface = [NSString stringWithCString:networkInterfaceName encoding:NSASCIIStringEncoding];
}
if (rti_info[RTAX_DST]->sa_family == AF_INET6) {
return [self initWithIPv6Network:network gateway:gateway networkInterface:networkInterface];
} else {
return [self initWithIPv4Network:network gateway:gateway networkInterface:networkInterface];
}
}
- (NSString *)networkMask
{
struct in_addr mask;
mask.s_addr = htonl(~((1 << (32 - self.prefix)) - 1));
const char *address = inet_ntoa(mask);
return [NSString stringWithCString:address encoding:NSASCIIStringEncoding];
}
- (BOOL)isDefault
{
return [self.network isEqualToString:@"default"];
}
- (BOOL)matchesDestination:(NSString *)destination
{
NSParameterAssert(destination);
if ([self isDefault]) {
return YES;
}
if (self.isIPv6) {
NSData *networkAddress = RoutingTableEntryAddress6(self.network);
NSData *destinationAddress = RoutingTableEntryAddress6(destination);
if (!networkAddress || !destinationAddress) {
return NO;
}
// NSLog(@"network: %@ = %@", networkAddress, self.network);
// NSLog(@"destination: %@ = %@", destinationAddress, destination);
const uint8_t *networkPtr = networkAddress.bytes;
const uint8_t *destinationPtr = destinationAddress.bytes;
NSInteger leftBits = self.prefix;
// NSLog(@"\tprefix = %u", (int)self.prefix);
for (NSInteger i = 0; leftBits > 0; ++i) {
uint8_t networkMask;
if (leftBits >= 8) {
networkMask = 0xff;
} else {
networkMask = ~((1 << (8 - leftBits)) - 1);
}
// NSLog(@"\tnetworkMask[%u] = %x", (int)i, networkMask);
if (((networkPtr[i] ^ destinationPtr[i]) & networkMask) != 0) {
return NO;
}
leftBits -= 8;
}
// NSLog(@"\tMATCH");
return YES;
}
else {
const uint32_t networkAddress = RoutingTableEntryAddress4(self.network);
const uint32_t destinationAddress = RoutingTableEntryAddress4(destination);
if ((networkAddress == UINT32_MAX) || (destinationAddress == UINT32_MAX)) {
return NO;
}
const uint32_t networkMask = ~((1 << (32 - self.prefix)) - 1);
// NSLog(@"network: %x = %@", networkAddress, self.network);
// NSLog(@"destination: %x = %@", destinationAddress, destination);
// NSLog(@"mask: %x", networkMask);
return ((networkAddress ^ destinationAddress) & networkMask) == 0;
}
}
- (nullable NSArray<RoutingTableEntry *> *)partitioned
{
NSMutableArray<RoutingTableEntry *> *segments = [[NSMutableArray alloc] init];
const int halfPrefix = (int)(self.prefix + 1);
if (self.isIPv6) {
if (self.prefix == 128) {
NSLog(@"Can't partition single IPv6");
return @[self, self];
}
struct in6_addr saddr1, saddr2;
char addr[INET6_ADDRSTRLEN];
NSData *addressData = RoutingTableEntryAddress6(self.network);
if (!addressData) {
return nil;
}
memcpy(&saddr1, addressData.bytes, addressData.length);
NSMutableData *addressData2 = [addressData mutableCopy];
uint8_t *addressBytes2 = (uint8_t *)addressData2.bytes;
const uint8_t mask2 = 1 << ((8 - halfPrefix % 8) % 8);
addressBytes2[(halfPrefix - 1) / 8] |= mask2;
memcpy(&saddr2, addressData2.bytes, addressData2.length);
inet_ntop(AF_INET6, &saddr1, addr, INET6_ADDRSTRLEN);
NSString *network1 = [NSString stringWithFormat:@"%s/%d", addr, halfPrefix];
inet_ntop(AF_INET6, &saddr2, addr, INET6_ADDRSTRLEN);
NSString *network2 = [NSString stringWithFormat:@"%s/%d", addr, halfPrefix];
[segments addObject:[[RoutingTableEntry alloc] initWithIPv6Network:network1 gateway:self.gateway networkInterface:self.networkInterface]];
[segments addObject:[[RoutingTableEntry alloc] initWithIPv6Network:network2 gateway:self.gateway networkInterface:self.networkInterface]];
} else {
if (self.prefix == 32) {
NSLog(@"Can't partition single IPv4");
return @[self, self];
}
struct in_addr saddr1, saddr2;
const uint32_t address = RoutingTableEntryAddress4(self.network);
if (address == UINT32_MAX) {
return nil;
}
saddr1.s_addr = htonl(address);
saddr2.s_addr = htonl(address | (1 << (32 - halfPrefix)));
// XXX: inet_ntoa returns pointer to static variable, copy before next call
const char *address1 = inet_ntoa(saddr1);
NSString *network1 = [NSString stringWithFormat:@"%s/%d", address1, halfPrefix];
const char *address2 = inet_ntoa(saddr2);
NSString *network2 = [NSString stringWithFormat:@"%s/%d", address2, halfPrefix];
[segments addObject:[[RoutingTableEntry alloc] initWithIPv4Network:network1 gateway:self.gateway networkInterface:self.networkInterface]];
[segments addObject:[[RoutingTableEntry alloc] initWithIPv4Network:network2 gateway:self.gateway networkInterface:self.networkInterface]];
}
return segments;
}
- (NSString *)description
{
return [NSString stringWithFormat:@"{%@/%ld -> %@ via %@}", self.network, self.prefix, self.gateway ?: @"nil", self.networkInterface];
}
@end
#pragma mark -
static char *netname(uint32_t in, uint32_t mask);
static char *netname6(struct sockaddr_in6 *sa6, struct sockaddr *sam);
static char *routename(uint32_t in);
static char *routename6(struct sockaddr_in6 *sa6);
static uint32_t forgemask(uint32_t a);
static void domask(char *dst, size_t dstsize, uint32_t addr, uint32_t mask);
static void trimdomain(char *cp);
static inline uint32_t RoutingTableEntryAddress4(NSString *string)
{
struct in_addr addr;
if (inet_pton(AF_INET, [string cStringUsingEncoding:NSASCIIStringEncoding], &addr) <= 0) {
return UINT32_MAX;
}
return CFSwapInt32BigToHost(addr.s_addr);
}
static inline NSData *RoutingTableEntryAddress6(NSString *string)
{
struct in6_addr addr;
if (inet_pton(AF_INET6, [string cStringUsingEncoding:NSASCIIStringEncoding], &addr) <= 0) {
return nil;
}
NSMutableData *data = [[NSMutableData alloc] initWithLength:16];
memcpy(data.mutableBytes, (void *)&addr, data.length);
return data;
}
static NSString *RoutingTableEntryName(struct sockaddr *sa, struct sockaddr *mask, int flags)
{
char *cp = NULL;
switch (sa->sa_family) {
case AF_INET: {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
if ((sin->sin_addr.s_addr == INADDR_ANY) && mask && (ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr) == 0L || mask->sa_len == 0)) {
cp = "default";
} else if (flags & RTF_HOST) {
cp = routename(sin->sin_addr.s_addr);
} else if (mask) {
cp = netname(sin->sin_addr.s_addr, ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr));
} else {
cp = netname(sin->sin_addr.s_addr, 0L);
}
break;
}
case AF_INET6: {
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
struct in6_addr *in6 = &sa6->sin6_addr;
/*
* XXX: This is a special workaround for KAME kernels.
* sin6_scope_id field of SA should be set in the future.
*/
if (IN6_IS_ADDR_LINKLOCAL(in6) ||
IN6_IS_ADDR_MC_NODELOCAL(in6) ||
IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
/* XXX: override is ok? */
sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)&in6->s6_addr[2]);
*(u_short *)&in6->s6_addr[2] = 0;
}
if (flags & RTF_HOST) {
cp = routename6(sa6);
} else if (mask) {
cp = netname6(sa6, mask);
} else {
cp = netname6(sa6, NULL);
}
break;
}
default:
break;
}
if (!cp) {
return nil;
}
return [NSString stringWithCString:cp encoding:NSASCIIStringEncoding];
}
char *routename(uint32_t in)
{
static char line[MAXHOSTNAMELEN];
#define C(x) ((x) & 0xff)
in = ntohl(in);
ASSERT_PRINTF(snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in >> 24), C(in >> 16), C(in >> 8), C(in)));
return (line);
}
char *routename6(struct sockaddr_in6 *sa6)
{
static char line[MAXHOSTNAMELEN];
int flag = NI_NUMERICHOST;
/* use local variable for safety */
struct sockaddr_in6 sa6_local = {sizeof(sa6_local), AF_INET6, };
sa6_local.sin6_addr = sa6->sin6_addr;
sa6_local.sin6_scope_id = sa6->sin6_scope_id;
ASSERT_GETNAMEINFO(getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len, line, sizeof(line), NULL, 0, flag));
return line;
}
/*
* Return the name of the network whose address is given.
* The address is assumed to be that of a net or subnet, not a host.
*/
char *netname(uint32_t in, uint32_t mask)
{
char *cp = 0;
static char line[MAXHOSTNAMELEN];
struct netent *np = 0;
uint32_t net, omask, dmask;
uint32_t i;
i = ntohl(in);
dmask = forgemask(i);
omask = mask;
// if (!nflag && i) {
if (i) {
net = i & dmask;
if (!(np = getnetbyaddr(i, AF_INET)) && net != i)
np = getnetbyaddr(net, AF_INET);
if (np) {
cp = np->n_name;
trimdomain(cp);
}
}
if (cp) {
strncpy(line, cp, sizeof(line) - 1);
} else {
switch (dmask) {
case IN_CLASSA_NET:
if ((i & IN_CLASSA_HOST) == 0) {
ASSERT_PRINTF(snprintf(line, sizeof(line), "%u", C(i >> 24)));
break;
}
/* FALLTHROUGH */
case IN_CLASSB_NET:
if ((i & IN_CLASSB_HOST) == 0) {
ASSERT_PRINTF(snprintf(line, sizeof(line), "%u.%u", C(i >> 24), C(i >> 16)));
break;
}
/* FALLTHROUGH */
case IN_CLASSC_NET:
if ((i & IN_CLASSC_HOST) == 0) {
ASSERT_PRINTF(snprintf(line, sizeof(line), "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8)));
break;
}
/* FALLTHROUGH */
default:
ASSERT_PRINTF(snprintf(line, sizeof(line), "%u.%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8), C(i)));
break;
}
}
domask(line + strlen(line), sizeof(line) - strlen(line), i, omask);
return (line);
}
char *netname6(struct sockaddr_in6 *sa6, struct sockaddr *sam)
{
char host[MAXHOSTNAMELEN];
static char line[MAXHOSTNAMELEN + 10];
u_char *lim;
int masklen, illegal = 0, flag = NI_NUMERICHOST;
struct in6_addr *mask = sam ? &((struct sockaddr_in6 *)sam)->sin6_addr : 0;
if (sam && sam->sa_len == 0) {
masklen = 0;
} else if (mask) {
u_char *p = (u_char *)mask;
for (masklen = 0, lim = p + 16; p < lim; p++) {
switch (*p) {
case 0xff:
masklen += 8;
break;
case 0xfe:
masklen += 7;
break;
case 0xfc:
masklen += 6;
break;
case 0xf8:
masklen += 5;
break;
case 0xf0:
masklen += 4;
break;
case 0xe0:
masklen += 3;
break;
case 0xc0:
masklen += 2;
break;
case 0x80:
masklen += 1;
break;
case 0x00:
break;
default:
illegal ++;
break;
}
}
if (illegal)
fprintf(stderr, "illegal prefixlen\n");
} else {
masklen = 128;
}
if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) {
return("default");
}
ASSERT_GETNAMEINFO(getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, host, sizeof(host), NULL, 0, flag));
if (masklen > 0) {
ASSERT_PRINTF(sprintf(line, "%s/%u", host, masklen));
} else {
ASSERT_PRINTF(sprintf(line, "%s", host));
}
return line;
}
uint32_t forgemask(uint32_t a)
{
uint32_t m;
if (IN_CLASSA(a))
m = IN_CLASSA_NET;
else if (IN_CLASSB(a))
m = IN_CLASSB_NET;
else
m = IN_CLASSC_NET;
return (m);
}
void domask(char *dst, size_t dstsize, uint32_t addr, uint32_t mask)
{
int b, i;
if (!mask || (forgemask(addr) == mask)) {
*dst = '\0';
return;
}
i = 0;
for (b = 0; b < 32; b++) {
if (mask & (1 << b)) {
int bb;
i = b;
for (bb = b+1; bb < 32; bb++)
if (!(mask & (1 << bb))) {
i = -1; /* noncontig */
break;
}
break;
}
}
if (i == -1) {
ASSERT_PRINTF(snprintf(dst, dstsize, "&0x%x", mask));
} else {
ASSERT_PRINTF(snprintf(dst, dstsize, "/%d", 32-i));
}
}
void trimdomain(char *cp)
{
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
char *s;
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(s = strchr(domain, '.')))
(void) strcpy(domain, s + 1);
else
domain[0] = 0;
}
if (domain[0]) {
while ((cp = strchr(cp, '.'))) {
if (!strcasecmp(cp + 1, domain)) {
*cp = 0; /* hit it */
break;
} else {
cp++;
}
}
}
}

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Sources/CTunnelKitCore/include/RoutingTable.h
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//
// RoutingTable.h
// TunnelKit
//
// Created by Davide De Rosa on 4/30/19.
// Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of TunnelKit.
//
// TunnelKit is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TunnelKit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
//
#import <Foundation/Foundation.h>
#import "RoutingTableEntry.h"
NS_ASSUME_NONNULL_BEGIN
@interface RoutingTable : NSObject
- (NSArray<RoutingTableEntry *> *)ipv4;
- (NSArray<RoutingTableEntry *> *)ipv6;
- (nullable RoutingTableEntry *)defaultGateway4;
- (nullable RoutingTableEntry *)defaultGateway6;
- (nullable RoutingTableEntry *)broadestRoute4MatchingDestination:(NSString *)destination;
- (nullable RoutingTableEntry *)broadestRoute6MatchingDestination:(NSString *)destination;
@end
NS_ASSUME_NONNULL_END

48
Sources/CTunnelKitCore/include/RoutingTableEntry.h
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@ -1,48 +0,0 @@
//
// RoutingTableEntry.h
// TunnelKit
//
// Created by Davide De Rosa on 4/30/19.
// Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of TunnelKit.
//
// TunnelKit is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TunnelKit is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface RoutingTableEntry : NSObject
- (instancetype)initWithIPv4Network:(NSString *)network gateway:(nullable NSString *)gateway networkInterface:(NSString *)networkInterface;
- (instancetype)initWithIPv6Network:(NSString *)network gateway:(nullable NSString *)gateway networkInterface:(NSString *)networkInterface;
- (BOOL)isIPv6;
- (NSString *)network;
- (NSInteger)prefix;
- (nullable NSString *)networkMask; // nil if IPv6
- (nullable NSString *)gateway;
- (NSString *)networkInterface;
- (BOOL)isDefault;
- (BOOL)matchesDestination:(NSString *)destination;
- (nullable NSArray<RoutingTableEntry *> *)partitioned;
@end
NS_ASSUME_NONNULL_END

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Sources/CTunnelKitCore/include/route.h
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@ -1,257 +0,0 @@
/*
* Copyright (c) 2000-2017 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)route.h 8.3 (Berkeley) 4/19/94
* $FreeBSD: src/sys/net/route.h,v 1.36.2.1 2000/08/16 06:14:23 jayanth Exp $
*/
#ifndef _NET_ROUTE_H_
#define _NET_ROUTE_H_
#include <sys/appleapiopts.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
/*
* These numbers are used by reliable protocols for determining
* retransmission behavior and are included in the routing structure.
*/
struct rt_metrics {
u_int32_t rmx_locks; /* Kernel leaves these values alone */
u_int32_t rmx_mtu; /* MTU for this path */
u_int32_t rmx_hopcount; /* max hops expected */
int32_t rmx_expire; /* lifetime for route, e.g. redirect */
u_int32_t rmx_recvpipe; /* inbound delay-bandwidth product */
u_int32_t rmx_sendpipe; /* outbound delay-bandwidth product */
u_int32_t rmx_ssthresh; /* outbound gateway buffer limit */
u_int32_t rmx_rtt; /* estimated round trip time */
u_int32_t rmx_rttvar; /* estimated rtt variance */
u_int32_t rmx_pksent; /* packets sent using this route */
u_int32_t rmx_state; /* route state */
u_int32_t rmx_filler[3]; /* will be used for T/TCP later */
};
/*
* rmx_rtt and rmx_rttvar are stored as microseconds;
*/
#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
#define RTF_UP 0x1 /* route usable */
#define RTF_GATEWAY 0x2 /* destination is a gateway */
#define RTF_HOST 0x4 /* host entry (net otherwise) */
#define RTF_REJECT 0x8 /* host or net unreachable */
#define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
#define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
#define RTF_DONE 0x40 /* message confirmed */
#define RTF_DELCLONE 0x80 /* delete cloned route */
#define RTF_CLONING 0x100 /* generate new routes on use */
#define RTF_XRESOLVE 0x200 /* external daemon resolves name */
#define RTF_LLINFO 0x400 /* DEPRECATED - exists ONLY for backward
* compatibility */
#define RTF_LLDATA 0x400 /* used by apps to add/del L2 entries */
#define RTF_STATIC 0x800 /* manually added */
#define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
#define RTF_NOIFREF 0x2000 /* not eligible for RTF_IFREF */
#define RTF_PROTO2 0x4000 /* protocol specific routing flag */
#define RTF_PROTO1 0x8000 /* protocol specific routing flag */
#define RTF_PRCLONING 0x10000 /* protocol requires cloning */
#define RTF_WASCLONED 0x20000 /* route generated through cloning */
#define RTF_PROTO3 0x40000 /* protocol specific routing flag */
/* 0x80000 unused */
#define RTF_PINNED 0x100000 /* future use */
#define RTF_LOCAL 0x200000 /* route represents a local address */
#define RTF_BROADCAST 0x400000 /* route represents a bcast address */
#define RTF_MULTICAST 0x800000 /* route represents a mcast address */
#define RTF_IFSCOPE 0x1000000 /* has valid interface scope */
#define RTF_CONDEMNED 0x2000000 /* defunct; no longer modifiable */
#define RTF_IFREF 0x4000000 /* route holds a ref to interface */
#define RTF_PROXY 0x8000000 /* proxying, no interface scope */
#define RTF_ROUTER 0x10000000 /* host is a router */
#define RTF_DEAD 0x20000000 /* Route entry is being freed */
/* 0x40000000 and up unassigned */
#define RTPRF_OURS RTF_PROTO3 /* set on routes we manage */
#define RTF_BITS \
"\020\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" \
"\10DELCLONE\11CLONING\12XRESOLVE\13LLINFO\14STATIC\15BLACKHOLE" \
"\16NOIFREF\17PROTO2\20PROTO1\21PRCLONING\22WASCLONED\23PROTO3" \
"\25PINNED\26LOCAL\27BROADCAST\30MULTICAST\31IFSCOPE\32CONDEMNED" \
"\33IFREF\34PROXY\35ROUTER"
#define IS_DIRECT_HOSTROUTE(rt) \
(((rt)->rt_flags & (RTF_HOST | RTF_GATEWAY)) == RTF_HOST)
/*
* Routing statistics.
*/
struct rtstat {
short rts_badredirect; /* bogus redirect calls */
short rts_dynamic; /* routes created by redirects */
short rts_newgateway; /* routes modified by redirects */
short rts_unreach; /* lookups which failed */
short rts_wildcard; /* lookups satisfied by a wildcard */
short rts_badrtgwroute; /* route to gateway is not direct */
};
/*
* Structures for routing messages.
*/
struct rt_msghdr {
u_short rtm_msglen; /* to skip over non-understood messages */
u_char rtm_version; /* future binary compatibility */
u_char rtm_type; /* message type */
u_short rtm_index; /* index for associated ifp */
int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
int rtm_addrs; /* bitmask identifying sockaddrs in msg */
pid_t rtm_pid; /* identify sender */
int rtm_seq; /* for sender to identify action */
int rtm_errno; /* why failed */
int rtm_use; /* from rtentry */
u_int32_t rtm_inits; /* which metrics we are initializing */
struct rt_metrics rtm_rmx; /* metrics themselves */
};
struct rt_msghdr2 {
u_short rtm_msglen; /* to skip over non-understood messages */
u_char rtm_version; /* future binary compatibility */
u_char rtm_type; /* message type */
u_short rtm_index; /* index for associated ifp */
int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
int rtm_addrs; /* bitmask identifying sockaddrs in msg */
int32_t rtm_refcnt; /* reference count */
int rtm_parentflags; /* flags of the parent route */
int rtm_reserved; /* reserved field set to 0 */
int rtm_use; /* from rtentry */
u_int32_t rtm_inits; /* which metrics we are initializing */
struct rt_metrics rtm_rmx; /* metrics themselves */
};
#define RTM_VERSION 5 /* Up the ante and ignore older versions */
/*
* Message types.
*/
#define RTM_ADD 0x1 /* Add Route */
#define RTM_DELETE 0x2 /* Delete Route */
#define RTM_CHANGE 0x3 /* Change Metrics or flags */
#define RTM_GET 0x4 /* Report Metrics */
#define RTM_LOSING 0x5 /* RTM_LOSING is no longer generated by xnu
* and is deprecated */
#define RTM_REDIRECT 0x6 /* Told to use different route */
#define RTM_MISS 0x7 /* Lookup failed on this address */
#define RTM_LOCK 0x8 /* fix specified metrics */
#define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
#define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
#define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
#define RTM_NEWADDR 0xc /* address being added to iface */
#define RTM_DELADDR 0xd /* address being removed from iface */
#define RTM_IFINFO 0xe /* iface going up/down etc. */
#define RTM_NEWMADDR 0xf /* mcast group membership being added to if */
#define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
#define RTM_IFINFO2 0x12 /* */
#define RTM_NEWMADDR2 0x13 /* */
#define RTM_GET2 0x14 /* */
/*
* Bitmask values for rtm_inits and rmx_locks.
*/
#define RTV_MTU 0x1 /* init or lock _mtu */
#define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
#define RTV_EXPIRE 0x4 /* init or lock _expire */
#define RTV_RPIPE 0x8 /* init or lock _recvpipe */
#define RTV_SPIPE 0x10 /* init or lock _sendpipe */
#define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
#define RTV_RTT 0x40 /* init or lock _rtt */
#define RTV_RTTVAR 0x80 /* init or lock _rttvar */
/*
* Bitmask values for rtm_addrs.
*/
#define RTA_DST 0x1 /* destination sockaddr present */
#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
#define RTA_NETMASK 0x4 /* netmask sockaddr present */
#define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
#define RTA_IFP 0x10 /* interface name sockaddr present */
#define RTA_IFA 0x20 /* interface addr sockaddr present */
#define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
#define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
/*
* Index offsets for sockaddr array for alternate internal encoding.
*/
#define RTAX_DST 0 /* destination sockaddr present */
#define RTAX_GATEWAY 1 /* gateway sockaddr present */
#define RTAX_NETMASK 2 /* netmask sockaddr present */
#define RTAX_GENMASK 3 /* cloning mask sockaddr present */
#define RTAX_IFP 4 /* interface name sockaddr present */
#define RTAX_IFA 5 /* interface addr sockaddr present */
#define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
#define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
#define RTAX_MAX 8 /* size of array to allocate */
struct rt_addrinfo {
int rti_addrs;
struct sockaddr *rti_info[RTAX_MAX];
};
#endif /* _NET_ROUTE_H_ */