static bool inetAddressToSockaddr(JNIEnv* env, jobject inetAddress, int port, sockaddr_storage* ss, bool map) {
memset(ss, 0, sizeof(*ss));
if (inetAddress == NULL) {
jniThrowNullPointerException(env, NULL);
return false;
}
// Get the address family.
static jfieldID familyFid = env->GetFieldID(JniConstants::inetAddressClass, "family", "I");
ss->ss_family = env->GetIntField(inetAddress, familyFid);
if (ss->ss_family == AF_UNSPEC) {
return true; // Job done!
}
// Check this is an address family we support.
if (ss->ss_family != AF_INET && ss->ss_family != AF_INET6) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"inetAddressToSockaddr bad family: %i", ss->ss_family);
return false;
}
// Get the byte array that stores the IP address bytes in the InetAddress.
static jfieldID bytesFid = env->GetFieldID(JniConstants::inetAddressClass, "ipaddress", "[B");
ScopedLocalRef<jbyteArray> addressBytes(env, reinterpret_cast<jbyteArray>(env->GetObjectField(inetAddress, bytesFid)));
if (addressBytes.get() == NULL) {
jniThrowNullPointerException(env, NULL);
return false;
}
// We use AF_INET6 sockets, so we want an IPv6 address (which may be a IPv4-mapped address).
sockaddr_in6* sin6 = reinterpret_cast<sockaddr_in6*>(ss);
sin6->sin6_port = htons(port);
if (ss->ss_family == AF_INET6) {
// IPv6 address. Copy the bytes...
jbyte* dst = reinterpret_cast<jbyte*>(&sin6->sin6_addr.s6_addr);
env->GetByteArrayRegion(addressBytes.get(), 0, 16, dst);
// ...and set the scope id...
static jfieldID scopeFid = env->GetFieldID(JniConstants::inet6AddressClass, "scope_id", "I");
sin6->sin6_scope_id = env->GetIntField(inetAddress, scopeFid);
return true;
}
// Deal with Inet4Address instances.
if (map) {
// We should represent this Inet4Address as an IPv4-mapped IPv6 sockaddr_in6.
// Change the family...
sin6->sin6_family = AF_INET6;
// Copy the bytes...
jbyte* dst = reinterpret_cast<jbyte*>(&sin6->sin6_addr.s6_addr[12]);
env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst);
// INADDR_ANY and in6addr_any are both all-zeros...
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
// ...but all other IPv4-mapped addresses are ::ffff:a.b.c.d, so insert the ffff...
memset(&(sin6->sin6_addr.s6_addr[10]), 0xff, 2);
}
} else {
// We should represent this Inet4Address as an IPv4 sockaddr_in.
sockaddr_in* sin = reinterpret_cast<sockaddr_in*>(ss);
sin->sin_port = htons(port);
jbyte* dst = reinterpret_cast<jbyte*>(&sin->sin_addr.s_addr);
env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst);
}
return true;
}
static bool inetAddressToSockaddr(JNIEnv* env, jobject inetAddress, int port, sockaddr_storage& ss, socklen_t& sa_len, bool map) {
memset(&ss, 0, sizeof(ss));
sa_len = 0;
if (inetAddress == NULL) {
jniThrowNullPointerException(env, NULL);
return false;
}
// Get the address family.
static jfieldID familyFid = env->GetFieldID(JniConstants::inetAddressClass, "family", "I");
ss.ss_family = env->GetIntField(inetAddress, familyFid);
if (ss.ss_family == AF_UNSPEC) {
sa_len = sizeof(ss.ss_family);
return true; // Job done!
}
// Check this is an address family we support.
if (ss.ss_family != AF_INET && ss.ss_family != AF_INET6 && ss.ss_family != AF_UNIX) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"inetAddressToSockaddr bad family: %i", ss.ss_family);
return false;
}
// Get the byte array that stores the IP address bytes in the InetAddress.
static jfieldID bytesFid = env->GetFieldID(JniConstants::inetAddressClass, "ipaddress", "[B");
ScopedLocalRef<jbyteArray> addressBytes(env, reinterpret_cast<jbyteArray>(env->GetObjectField(inetAddress, bytesFid)));
if (addressBytes.get() == NULL) {
jniThrowNullPointerException(env, NULL);
return false;
}
// Handle the AF_UNIX special case.
if (ss.ss_family == AF_UNIX) {
sockaddr_un& sun = reinterpret_cast<sockaddr_un&>(ss);
size_t path_length = env->GetArrayLength(addressBytes.get());
if (path_length >= sizeof(sun.sun_path)) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"inetAddressToSockaddr path too long for AF_UNIX: %i", path_length);
return false;
}
// Copy the bytes...
jbyte* dst = reinterpret_cast<jbyte*>(&sun.sun_path);
memset(dst, 0, sizeof(sun.sun_path));
env->GetByteArrayRegion(addressBytes.get(), 0, path_length, dst);
sa_len = sizeof(sun.sun_path);
return true;
}
// TODO: bionic's getnameinfo(3) seems to want its length parameter to be exactly
// sizeof(sockaddr_in) for an IPv4 address and sizeof (sockaddr_in6) for an
// IPv6 address. Fix getnameinfo so it accepts sizeof(sockaddr_storage), and
// then unconditionally set sa_len to sizeof(sockaddr_storage) instead of having
// to deal with this case by case.
// We use AF_INET6 sockets, so we want an IPv6 address (which may be a IPv4-mapped address).
sockaddr_in6& sin6 = reinterpret_cast<sockaddr_in6&>(ss);
sin6.sin6_port = htons(port);
if (ss.ss_family == AF_INET6) {
// IPv6 address. Copy the bytes...
jbyte* dst = reinterpret_cast<jbyte*>(&sin6.sin6_addr.s6_addr);
env->GetByteArrayRegion(addressBytes.get(), 0, 16, dst);
// ...and set the scope id...
static jfieldID scopeFid = env->GetFieldID(JniConstants::inet6AddressClass, "scope_id", "I");
sin6.sin6_scope_id = env->GetIntField(inetAddress, scopeFid);
sa_len = sizeof(sockaddr_in6);
return true;
}
// Deal with Inet4Address instances.
if (map) {
// We should represent this Inet4Address as an IPv4-mapped IPv6 sockaddr_in6.
// Change the family...
sin6.sin6_family = AF_INET6;
// Copy the bytes...
jbyte* dst = reinterpret_cast<jbyte*>(&sin6.sin6_addr.s6_addr[12]);
env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst);
// INADDR_ANY and in6addr_any are both all-zeros...
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
// ...but all other IPv4-mapped addresses are ::ffff:a.b.c.d, so insert the ffff...
memset(&(sin6.sin6_addr.s6_addr[10]), 0xff, 2);
}
sa_len = sizeof(sockaddr_in6);
} else {
// We should represent this Inet4Address as an IPv4 sockaddr_in.
sockaddr_in& sin = reinterpret_cast<sockaddr_in&>(ss);
sin.sin_port = htons(port);
jbyte* dst = reinterpret_cast<jbyte*>(&sin.sin_addr.s_addr);
env->GetByteArrayRegion(addressBytes.get(), 0, 4, dst);
sa_len = sizeof(sockaddr_in);
}
return true;
}
