static jlong nativeCreate(JNIEnv* env, jclass thiz, jint fd, jlong size) {
initializeLibraryIfNeeded();
FPDF_FILEACCESS loader;
loader.m_FileLen = size;
loader.m_Param = reinterpret_cast<void*>(intptr_t(fd));
loader.m_GetBlock = &getBlock;
FPDF_DOCUMENT document = FPDF_LoadCustomDocument(&loader, NULL);
if (!document) {
const long error = FPDF_GetLastError();
switch (error) {
case FPDF_ERR_PASSWORD:
case FPDF_ERR_SECURITY: {
jniThrowExceptionFmt(env, "java/lang/SecurityException",
"cannot create document. Error: %ld", error);
} break;
default: {
jniThrowExceptionFmt(env, "java/io/IOException",
"cannot create document. Error: %ld", error);
} break;
}
destroyLibraryIfNeeded();
return -1;
}
return reinterpret_cast<jlong>(document);
}
static jstring AlphabeticIndex_getBucketLabel(JNIEnv* env, jclass, jlong peer, jint index) {
if (index < 0) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "Invalid index: %d", index);
return NULL;
}
// Iterate to the nth bucket.
AlphabeticIndex* ai = fromPeer(peer);
UErrorCode status = U_ZERO_ERROR;
ai->resetBucketIterator(status);
if (maybeThrowIcuException(env, "AlphabeticIndex::resetBucketIterator", status)) {
return NULL;
}
for (jint i = 0; i <= index; ++i) {
if (!ai->nextBucket(status)) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "Invalid index: %d", index);
return NULL;
}
if (maybeThrowIcuException(env, "AlphabeticIndex::nextBucket", status)) {
return NULL;
}
}
// Return "" for the underflow/inflow/overflow buckets.
if (ai->getBucketLabelType() != U_ALPHAINDEX_NORMAL) {
return env->NewStringUTF("");
}
const UnicodeString& label(ai->getBucketLabel());
return env->NewString(label.getBuffer(), label.length());
}
jobject sockaddrToInetAddress(JNIEnv* env, const sockaddr_storage* ss, jint* port) {
// Convert IPv4-mapped IPv6 addresses to IPv4 addresses.
// The RI states "Java will never return an IPv4-mapped address".
sockaddr_storage tmp;
memset(&tmp, 0, sizeof(tmp));
const sockaddr_in6* sin6 = reinterpret_cast<const sockaddr_in6*>(ss);
if (ss->ss_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
// Copy the IPv6 address into the temporary sockaddr_storage.
memcpy(&tmp, ss, sizeof(tmp));
// Unmap it into an IPv4 address.
sockaddr_in* sin = reinterpret_cast<sockaddr_in*>(&tmp);
sin->sin_family = AF_INET;
sin->sin_port = sin6->sin6_port;
memcpy(&sin->sin_addr.s_addr, &sin6->sin6_addr.s6_addr[12], 4);
// Fall through into the regular conversion using the unmapped address.
ss = &tmp;
}
const void* rawAddress;
size_t addressLength;
int sin_port;
int scope_id = 0;
if (ss->ss_family == AF_INET) {
const sockaddr_in* sin = reinterpret_cast<const sockaddr_in*>(ss);
rawAddress = &sin->sin_addr.s_addr;
addressLength = 4;
sin_port = ntohs(sin->sin_port);
} else if (ss->ss_family == AF_INET6) {
const sockaddr_in6* sin6 = reinterpret_cast<const sockaddr_in6*>(ss);
rawAddress = &sin6->sin6_addr.s6_addr;
addressLength = 16;
sin_port = ntohs(sin6->sin6_port);
scope_id = sin6->sin6_scope_id;
} else {
// We can't throw SocketException. We aren't meant to see bad addresses, so seeing one
// really does imply an internal error.
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"sockaddrToInetAddress bad ss_family: %i", ss->ss_family);
return NULL;
}
if (port != NULL) {
*port = sin_port;
}
ScopedLocalRef<jbyteArray> byteArray(env, env->NewByteArray(addressLength));
if (byteArray.get() == NULL) {
return NULL;
}
env->SetByteArrayRegion(byteArray.get(), 0, addressLength,
reinterpret_cast<const jbyte*>(rawAddress));
static jmethodID getByAddressMethod = env->GetStaticMethodID(JniConstants::inetAddressClass,
"getByAddress", "(Ljava/lang/String;[BI)Ljava/net/InetAddress;");
if (getByAddressMethod == NULL) {
return NULL;
}
return env->CallStaticObjectMethod(JniConstants::inetAddressClass, getByAddressMethod,
NULL, byteArray.get(), scope_id);
}
static void nativeWrite(JNIEnv* env, jclass thiz, jlong documentPtr, jint fd) {
FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
PdfToFdWriter writer;
writer.dstFd = fd;
writer.WriteBlock = &writeBlock;
const bool success = FPDF_SaveAsCopy(document, &writer, FPDF_NO_INCREMENTAL);
if (!success) {
jniThrowExceptionFmt(env, "java/io/IOException",
"cannot write to fd. Error: %d", errno);
destroyLibraryIfNeeded();
}
}
static void android_net_utils_attachRaFilter(JNIEnv *env, jobject clazz, jobject javaFd,
jint hardwareAddressType)
{
if (hardwareAddressType != ARPHRD_ETHER) {
jniThrowExceptionFmt(env, "java/net/SocketException",
"attachRaFilter only supports ARPHRD_ETHER");
return;
}
uint32_t ipv6_offset = sizeof(ether_header);
uint32_t ipv6_next_header_offset = ipv6_offset + offsetof(ip6_hdr, ip6_nxt);
uint32_t icmp6_offset = ipv6_offset + sizeof(ip6_hdr);
uint32_t icmp6_type_offset = icmp6_offset + offsetof(icmp6_hdr, icmp6_type);
struct sock_filter filter_code[] = {
// Check IPv6 Next Header is ICMPv6.
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, ipv6_next_header_offset),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, IPPROTO_ICMPV6, 0, 3),
// Check ICMPv6 type is Router Advertisement.
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, icmp6_type_offset),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, ND_ROUTER_ADVERT, 0, 1),
// Accept or reject.
BPF_STMT(BPF_RET | BPF_K, 0xffff),
BPF_STMT(BPF_RET | BPF_K, 0)
};
struct sock_fprog filter = {
sizeof(filter_code) / sizeof(filter_code[0]),
filter_code,
};
int fd = jniGetFDFromFileDescriptor(env, javaFd);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) != 0) {
jniThrowExceptionFmt(env, "java/net/SocketException",
"setsockopt(SO_ATTACH_FILTER): %s", strerror(errno));
}
}
static jstring ImmutableIndex_getBucketLabel(JNIEnv* env, jclass, jlong peer, jint index) {
AlphabeticIndex::ImmutableIndex* ii = immutableIndexFromPeer(peer);
const AlphabeticIndex::Bucket* bucket = ii->getBucket(index);
if (bucket == NULL) {
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException", "Invalid index: %d", index);
return NULL;
}
// Return "" for the underflow/inflow/overflow buckets.
if (bucket->getLabelType() != U_ALPHAINDEX_NORMAL) {
return env->NewStringUTF("");
}
const UnicodeString& label(bucket->getLabel());
return env->NewString(label.getBuffer(), label.length());
}
static jlong nativeOpen(JNIEnv* env, jclass thiz, jint fd, jlong size) {
initializeLibraryIfNeeded();
FPDF_FILEACCESS loader;
loader.m_FileLen = size;
loader.m_Param = reinterpret_cast<void*>(intptr_t(fd));
loader.m_GetBlock = &getBlock;
FPDF_DOCUMENT document = FPDF_LoadCustomDocument(&loader, NULL);
if (!document) {
const long error = FPDF_GetLastError();
jniThrowExceptionFmt(env, "java/io/IOException",
"cannot create document. Error: %ld", error);
destroyLibraryIfNeeded();
return -1;
}
return reinterpret_cast<jlong>(document);
}
static void android_net_utils_attachDhcpFilter(JNIEnv *env, jobject clazz, jobject javaFd)
{
uint32_t ip_offset = sizeof(ether_header);
uint32_t proto_offset = ip_offset + offsetof(iphdr, protocol);
uint32_t flags_offset = ip_offset + offsetof(iphdr, frag_off);
uint32_t dport_indirect_offset = ip_offset + offsetof(udphdr, dest);
struct sock_filter filter_code[] = {
// Check the protocol is UDP.
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, proto_offset),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, IPPROTO_UDP, 0, 6),
// Check this is not a fragment.
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, flags_offset),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0x1fff, 4, 0),
// Get the IP header length.
BPF_STMT(BPF_LDX | BPF_B | BPF_MSH, ip_offset),
// Check the destination port.
BPF_STMT(BPF_LD | BPF_H | BPF_IND, dport_indirect_offset),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, kDhcpClientPort, 0, 1),
// Accept or reject.
BPF_STMT(BPF_RET | BPF_K, 0xffff),
BPF_STMT(BPF_RET | BPF_K, 0)
};
struct sock_fprog filter = {
sizeof(filter_code) / sizeof(filter_code[0]),
filter_code,
};
int fd = jniGetFDFromFileDescriptor(env, javaFd);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) != 0) {
jniThrowExceptionFmt(env, "java/net/SocketException",
"setsockopt(SO_ATTACH_FILTER): %s", strerror(errno));
}
}
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;
}
inline int jniThrowExceptionFmt(JNIEnv* env, const char* className, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
return jniThrowExceptionFmt(env, className, fmt, args);
va_end(args);
}
jobject sockaddrToInetAddress(JNIEnv* env, const sockaddr_storage& ss, jint* port) {
// Convert IPv4-mapped IPv6 addresses to IPv4 addresses.
// The RI states "Java will never return an IPv4-mapped address".
const sockaddr_in6& sin6 = reinterpret_cast<const sockaddr_in6&>(ss);
if (ss.ss_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
// Copy the IPv6 address into the temporary sockaddr_storage.
sockaddr_storage tmp;
memset(&tmp, 0, sizeof(tmp));
memcpy(&tmp, &ss, sizeof(sockaddr_in6));
// Unmap it into an IPv4 address.
sockaddr_in& sin = reinterpret_cast<sockaddr_in&>(tmp);
sin.sin_family = AF_INET;
sin.sin_port = sin6.sin6_port;
memcpy(&sin.sin_addr.s_addr, &sin6.sin6_addr.s6_addr[12], 4);
// Do the regular conversion using the unmapped address.
return sockaddrToInetAddress(env, tmp, port);
}
const void* rawAddress;
size_t addressLength;
int sin_port = 0;
int scope_id = 0;
if (ss.ss_family == AF_INET) {
const sockaddr_in& sin = reinterpret_cast<const sockaddr_in&>(ss);
rawAddress = &sin.sin_addr.s_addr;
addressLength = 4;
sin_port = ntohs(sin.sin_port);
} else if (ss.ss_family == AF_INET6) {
const sockaddr_in6& sin6 = reinterpret_cast<const sockaddr_in6&>(ss);
rawAddress = &sin6.sin6_addr.s6_addr;
addressLength = 16;
sin_port = ntohs(sin6.sin6_port);
scope_id = sin6.sin6_scope_id;
} else if (ss.ss_family == AF_UNIX) {
const sockaddr_un& sun = reinterpret_cast<const sockaddr_un&>(ss);
rawAddress = &sun.sun_path;
addressLength = strlen(sun.sun_path);
} else {
// We can't throw SocketException. We aren't meant to see bad addresses, so seeing one
// really does imply an internal error.
jniThrowExceptionFmt(env, "java/lang/IllegalArgumentException",
"sockaddrToInetAddress unsupported ss_family: %i", ss.ss_family);
return NULL;
}
if (port != NULL) {
*port = sin_port;
}
ScopedLocalRef<jbyteArray> byteArray(env, env->NewByteArray(addressLength));
if (byteArray.get() == NULL) {
return NULL;
}
env->SetByteArrayRegion(byteArray.get(), 0, addressLength,
reinterpret_cast<const jbyte*>(rawAddress));
if (ss.ss_family == AF_UNIX) {
// Note that we get here for AF_UNIX sockets on accept(2). The unix(7) man page claims
// that the peer's sun_path will contain the path, but in practice it doesn't, and the
// peer length is returned as 2 (meaning only the sun_family field was set).
static jmethodID ctor = env->GetMethodID(JniConstants::inetUnixAddressClass, "<init>", "([B)V");
return env->NewObject(JniConstants::inetUnixAddressClass, ctor, byteArray.get());
}
static jmethodID getByAddressMethod = env->GetStaticMethodID(JniConstants::inetAddressClass,
"getByAddress", "(Ljava/lang/String;[BI)Ljava/net/InetAddress;");
if (getByAddressMethod == NULL) {
return NULL;
}
return env->CallStaticObjectMethod(JniConstants::inetAddressClass, getByAddressMethod,
NULL, byteArray.get(), scope_id);
}
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;
}