зеркало из https://github.com/mozilla/gecko-dev.git
332 строки
9.1 KiB
C++
332 строки
9.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/net/DNS.h"
|
|
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/mozalloc.h"
|
|
#include "mozilla/ArrayUtils.h"
|
|
#include <string.h>
|
|
|
|
#ifdef XP_WIN
|
|
#include "ws2tcpip.h"
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
namespace net {
|
|
|
|
const char *inet_ntop_internal(int af, const void *src, char *dst, socklen_t size)
|
|
{
|
|
#ifdef XP_WIN
|
|
if (af == AF_INET) {
|
|
struct sockaddr_in s;
|
|
memset(&s, 0, sizeof(s));
|
|
s.sin_family = AF_INET;
|
|
memcpy(&s.sin_addr, src, sizeof(struct in_addr));
|
|
int result = getnameinfo((struct sockaddr *)&s, sizeof(struct sockaddr_in),
|
|
dst, size, nullptr, 0, NI_NUMERICHOST);
|
|
if (result == 0) {
|
|
return dst;
|
|
}
|
|
}
|
|
else if (af == AF_INET6) {
|
|
struct sockaddr_in6 s;
|
|
memset(&s, 0, sizeof(s));
|
|
s.sin6_family = AF_INET6;
|
|
memcpy(&s.sin6_addr, src, sizeof(struct in_addr6));
|
|
int result = getnameinfo((struct sockaddr *)&s, sizeof(struct sockaddr_in6),
|
|
dst, size, nullptr, 0, NI_NUMERICHOST);
|
|
if (result == 0) {
|
|
return dst;
|
|
}
|
|
}
|
|
return nullptr;
|
|
#else
|
|
return inet_ntop(af, src, dst, size);
|
|
#endif
|
|
}
|
|
|
|
// Copies the contents of a PRNetAddr to a NetAddr.
|
|
// Does not do a ptr safety check!
|
|
void PRNetAddrToNetAddr(const PRNetAddr *prAddr, NetAddr *addr)
|
|
{
|
|
if (prAddr->raw.family == PR_AF_INET) {
|
|
addr->inet.family = AF_INET;
|
|
addr->inet.port = prAddr->inet.port;
|
|
addr->inet.ip = prAddr->inet.ip;
|
|
}
|
|
else if (prAddr->raw.family == PR_AF_INET6) {
|
|
addr->inet6.family = AF_INET6;
|
|
addr->inet6.port = prAddr->ipv6.port;
|
|
addr->inet6.flowinfo = prAddr->ipv6.flowinfo;
|
|
memcpy(&addr->inet6.ip, &prAddr->ipv6.ip, sizeof(addr->inet6.ip.u8));
|
|
addr->inet6.scope_id = prAddr->ipv6.scope_id;
|
|
}
|
|
#if defined(XP_UNIX)
|
|
else if (prAddr->raw.family == PR_AF_LOCAL) {
|
|
addr->local.family = AF_LOCAL;
|
|
memcpy(addr->local.path, prAddr->local.path, sizeof(addr->local.path));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// Copies the contents of a NetAddr to a PRNetAddr.
|
|
// Does not do a ptr safety check!
|
|
void NetAddrToPRNetAddr(const NetAddr *addr, PRNetAddr *prAddr)
|
|
{
|
|
if (addr->raw.family == AF_INET) {
|
|
prAddr->inet.family = PR_AF_INET;
|
|
prAddr->inet.port = addr->inet.port;
|
|
prAddr->inet.ip = addr->inet.ip;
|
|
}
|
|
else if (addr->raw.family == AF_INET6) {
|
|
prAddr->ipv6.family = PR_AF_INET6;
|
|
prAddr->ipv6.port = addr->inet6.port;
|
|
prAddr->ipv6.flowinfo = addr->inet6.flowinfo;
|
|
memcpy(&prAddr->ipv6.ip, &addr->inet6.ip, sizeof(addr->inet6.ip.u8));
|
|
prAddr->ipv6.scope_id = addr->inet6.scope_id;
|
|
}
|
|
#if defined(XP_UNIX)
|
|
else if (addr->raw.family == AF_LOCAL) {
|
|
prAddr->local.family = PR_AF_LOCAL;
|
|
memcpy(prAddr->local.path, addr->local.path, sizeof(addr->local.path));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
bool NetAddrToString(const NetAddr *addr, char *buf, uint32_t bufSize)
|
|
{
|
|
if (addr->raw.family == AF_INET) {
|
|
if (bufSize < INET_ADDRSTRLEN) {
|
|
return false;
|
|
}
|
|
struct in_addr nativeAddr = {};
|
|
nativeAddr.s_addr = addr->inet.ip;
|
|
return !!inet_ntop_internal(AF_INET, &nativeAddr, buf, bufSize);
|
|
}
|
|
else if (addr->raw.family == AF_INET6) {
|
|
if (bufSize < INET6_ADDRSTRLEN) {
|
|
return false;
|
|
}
|
|
struct in6_addr nativeAddr = {};
|
|
memcpy(&nativeAddr.s6_addr, &addr->inet6.ip, sizeof(addr->inet6.ip.u8));
|
|
return !!inet_ntop_internal(AF_INET6, &nativeAddr, buf, bufSize);
|
|
}
|
|
#if defined(XP_UNIX)
|
|
else if (addr->raw.family == AF_LOCAL) {
|
|
if (bufSize < sizeof(addr->local.path)) {
|
|
// Many callers don't bother checking our return value, so
|
|
// null-terminate just in case.
|
|
if (bufSize > 0) {
|
|
buf[0] = '\0';
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Usually, the size passed to memcpy should be the size of the
|
|
// destination. Here, we know that the source is no larger than the
|
|
// destination, so using the source's size is always safe, whereas
|
|
// using the destination's size may cause us to read off the end of the
|
|
// source.
|
|
memcpy(buf, addr->local.path, sizeof(addr->local.path));
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
bool IsLoopBackAddress(const NetAddr *addr)
|
|
{
|
|
if (addr->raw.family == AF_INET) {
|
|
return (addr->inet.ip == htonl(INADDR_LOOPBACK));
|
|
}
|
|
else if (addr->raw.family == AF_INET6) {
|
|
if (IPv6ADDR_IS_LOOPBACK(&addr->inet6.ip)) {
|
|
return true;
|
|
} else if (IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip) &&
|
|
IPv6ADDR_V4MAPPED_TO_IPADDR(&addr->inet6.ip) == htonl(INADDR_LOOPBACK)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsIPAddrAny(const NetAddr *addr)
|
|
{
|
|
if (addr->raw.family == AF_INET) {
|
|
if (addr->inet.ip == htonl(INADDR_ANY)) {
|
|
return true;
|
|
}
|
|
}
|
|
else if (addr->raw.family == AF_INET6) {
|
|
if (IPv6ADDR_IS_UNSPECIFIED(&addr->inet6.ip)) {
|
|
return true;
|
|
} else if (IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip) &&
|
|
IPv6ADDR_V4MAPPED_TO_IPADDR(&addr->inet6.ip) == htonl(INADDR_ANY)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsIPAddrV4Mapped(const NetAddr *addr)
|
|
{
|
|
if (addr->raw.family == AF_INET6) {
|
|
return IPv6ADDR_IS_V4MAPPED(&addr->inet6.ip);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsIPAddrLocal(const NetAddr *addr)
|
|
{
|
|
MOZ_ASSERT(addr);
|
|
|
|
// IPv4 RFC1918 and Link Local Addresses.
|
|
if (addr->raw.family == AF_INET) {
|
|
uint32_t addr32 = ntohl(addr->inet.ip);
|
|
if (addr32 >> 24 == 0x0A || // 10/8 prefix (RFC 1918).
|
|
addr32 >> 20 == 0xAC1 || // 172.16/12 prefix (RFC 1918).
|
|
addr32 >> 16 == 0xC0A8 || // 192.168/16 prefix (RFC 1918).
|
|
addr32 >> 16 == 0xA9FE) { // 169.254/16 prefix (Link Local).
|
|
return true;
|
|
}
|
|
}
|
|
// IPv6 Unique and Link Local Addresses.
|
|
if (addr->raw.family == AF_INET6) {
|
|
uint16_t addr16 = ntohs(addr->inet6.ip.u16[0]);
|
|
if (addr16 >> 9 == 0xfc >> 1 || // fc00::/7 Unique Local Address.
|
|
addr16 >> 6 == 0xfe80 >> 6) { // fe80::/10 Link Local Address.
|
|
return true;
|
|
}
|
|
}
|
|
// Not an IPv4/6 local address.
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
GetPort(const NetAddr *aAddr, uint16_t *aResult)
|
|
{
|
|
uint16_t port;
|
|
if (aAddr->raw.family == PR_AF_INET) {
|
|
port = aAddr->inet.port;
|
|
} else if (aAddr->raw.family == PR_AF_INET6) {
|
|
port = aAddr->inet6.port;
|
|
} else {
|
|
return NS_ERROR_NOT_INITIALIZED;
|
|
}
|
|
|
|
*aResult = ntohs(port);
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
NetAddr::operator == (const NetAddr& other) const
|
|
{
|
|
if (this->raw.family != other.raw.family) {
|
|
return false;
|
|
} else if (this->raw.family == AF_INET) {
|
|
return (this->inet.port == other.inet.port) &&
|
|
(this->inet.ip == other.inet.ip);
|
|
} else if (this->raw.family == AF_INET6) {
|
|
return (this->inet6.port == other.inet6.port) &&
|
|
(this->inet6.flowinfo == other.inet6.flowinfo) &&
|
|
(memcmp(&this->inet6.ip, &other.inet6.ip,
|
|
sizeof(this->inet6.ip)) == 0) &&
|
|
(this->inet6.scope_id == other.inet6.scope_id);
|
|
#if defined(XP_UNIX)
|
|
} else if (this->raw.family == AF_LOCAL) {
|
|
return PL_strncmp(this->local.path, other.local.path,
|
|
ArrayLength(this->local.path));
|
|
#endif
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
NetAddrElement::NetAddrElement(const PRNetAddr *prNetAddr)
|
|
{
|
|
PRNetAddrToNetAddr(prNetAddr, &mAddress);
|
|
}
|
|
|
|
NetAddrElement::NetAddrElement(const NetAddrElement& netAddr)
|
|
{
|
|
mAddress = netAddr.mAddress;
|
|
}
|
|
|
|
NetAddrElement::~NetAddrElement()
|
|
{
|
|
}
|
|
|
|
AddrInfo::AddrInfo(const char *host, const PRAddrInfo *prAddrInfo,
|
|
bool disableIPv4, const char *cname)
|
|
{
|
|
MOZ_ASSERT(prAddrInfo, "Cannot construct AddrInfo with a null prAddrInfo pointer!");
|
|
|
|
Init(host, cname);
|
|
PRNetAddr tmpAddr;
|
|
void *iter = nullptr;
|
|
do {
|
|
iter = PR_EnumerateAddrInfo(iter, prAddrInfo, 0, &tmpAddr);
|
|
if (iter && (!disableIPv4 || tmpAddr.raw.family != PR_AF_INET)) {
|
|
NetAddrElement *addrElement = new NetAddrElement(&tmpAddr);
|
|
mAddresses.insertBack(addrElement);
|
|
}
|
|
} while (iter);
|
|
}
|
|
|
|
AddrInfo::AddrInfo(const char *host, const char *cname)
|
|
{
|
|
Init(host, cname);
|
|
}
|
|
|
|
AddrInfo::~AddrInfo()
|
|
{
|
|
NetAddrElement *addrElement;
|
|
while ((addrElement = mAddresses.popLast())) {
|
|
delete addrElement;
|
|
}
|
|
moz_free(mHostName);
|
|
moz_free(mCanonicalName);
|
|
}
|
|
|
|
void
|
|
AddrInfo::Init(const char *host, const char *cname)
|
|
{
|
|
MOZ_ASSERT(host, "Cannot initialize AddrInfo with a null host pointer!");
|
|
|
|
size_t hostlen = strlen(host);
|
|
mHostName = static_cast<char*>(moz_xmalloc(hostlen + 1));
|
|
memcpy(mHostName, host, hostlen + 1);
|
|
if (cname) {
|
|
size_t cnameLen = strlen(cname);
|
|
mCanonicalName = static_cast<char*>(moz_xmalloc(cnameLen + 1));
|
|
memcpy(mCanonicalName, cname, cnameLen + 1);
|
|
}
|
|
else {
|
|
mCanonicalName = nullptr;
|
|
}
|
|
}
|
|
|
|
void
|
|
AddrInfo::AddAddress(NetAddrElement *address)
|
|
{
|
|
MOZ_ASSERT(address, "Cannot add the address to an uninitialized list");
|
|
|
|
mAddresses.insertBack(address);
|
|
}
|
|
|
|
size_t
|
|
AddrInfo::SizeOfIncludingThis(MallocSizeOf mallocSizeOf) const
|
|
{
|
|
size_t n = mallocSizeOf(this);
|
|
n += mallocSizeOf(mHostName);
|
|
n += mallocSizeOf(mCanonicalName);
|
|
n += mAddresses.sizeOfExcludingThis(mallocSizeOf);
|
|
return n;
|
|
}
|
|
|
|
} // namespace dns
|
|
} // namespace mozilla
|