You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
3.9 KiB
105 lines
3.9 KiB
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef _SOCK_DIAG_H
|
|
#define _SOCK_DIAG_H
|
|
|
|
#include <unistd.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <linux/netlink.h>
|
|
#include <linux/sock_diag.h>
|
|
#include <linux/inet_diag.h>
|
|
|
|
#include <functional>
|
|
#include <set>
|
|
|
|
#include "Fwmark.h"
|
|
#include "NetlinkCommands.h"
|
|
#include "Permission.h"
|
|
#include "UidRanges.h"
|
|
|
|
struct inet_diag_msg;
|
|
struct tcp_info;
|
|
|
|
namespace android {
|
|
namespace net {
|
|
|
|
class SockDiag {
|
|
|
|
public:
|
|
static const int kBufferSize = 4096;
|
|
|
|
// Callback function that is called once for every socket in the sockDestroy dump.
|
|
// A return value of true means destroy the socket.
|
|
typedef std::function<bool(uint8_t proto, const inet_diag_msg *)> DestroyFilter;
|
|
|
|
// Callback function that is called once for every socket in the sockInfo dump.
|
|
// 'tcp_info_length' is the length in bytes of the INET_DIAG_INFO attribute read from Netlink.
|
|
// Knowing this length is necessary for handling struct tcp_info serialized from different
|
|
// kernel versions.
|
|
typedef std::function<void(Fwmark mark, const struct inet_diag_msg *, const struct tcp_info *,
|
|
uint32_t tcp_info_length)> TcpInfoReader;
|
|
|
|
struct DestroyRequest {
|
|
nlmsghdr nlh;
|
|
inet_diag_req_v2 req;
|
|
} __attribute__((__packed__));
|
|
|
|
SockDiag() : mSock(-1), mWriteSock(-1), mSocketsDestroyed(0) {}
|
|
bool open();
|
|
virtual ~SockDiag() { closeSocks(); }
|
|
|
|
int sendDumpRequest(uint8_t proto, uint8_t family, uint32_t states);
|
|
int sendDumpRequest(uint8_t proto, uint8_t family, const char *addrstr);
|
|
int readDiagMsg(uint8_t proto, const DestroyFilter& callback);
|
|
int readDiagMsgWithTcpInfo(const TcpInfoReader& callback);
|
|
|
|
int sockDestroy(uint8_t proto, const inet_diag_msg *);
|
|
// Destroys all sockets on the given IPv4 or IPv6 address.
|
|
int destroySockets(const char* addrstr, int ifindex);
|
|
// Destroys all sockets for the given protocol and UID.
|
|
int destroySockets(uint8_t proto, uid_t uid, bool excludeLoopback);
|
|
// Destroys all "live" (CONNECTED, SYN_SENT, SYN_RECV) TCP sockets for the given UID ranges.
|
|
int destroySockets(const UidRanges& uidRanges, const std::set<uid_t>& skipUids,
|
|
bool excludeLoopback);
|
|
// Destroys all "live" (CONNECTED, SYN_SENT, SYN_RECV) TCP sockets that no longer have
|
|
// the permissions required by the specified network.
|
|
int destroySocketsLackingPermission(unsigned netId, Permission permission,
|
|
bool excludeLoopback);
|
|
|
|
// Dump struct tcp_info for all "live" (CONNECTED, SYN_SENT, SYN_RECV) TCP sockets.
|
|
int getLiveTcpInfos(const TcpInfoReader& sockInfoReader);
|
|
|
|
private:
|
|
friend class SockDiagTest;
|
|
int mSock;
|
|
int mWriteSock;
|
|
int mSocketsDestroyed;
|
|
int sendDumpRequest(uint8_t proto, uint8_t family, uint8_t extensions, uint32_t states,
|
|
iovec *iov, int iovcnt);
|
|
int destroySockets(uint8_t proto, int family, const char* addrstr, int ifindex);
|
|
int destroyLiveSockets(const DestroyFilter& destroy, const char *what, iovec *iov, int iovcnt);
|
|
bool hasSocks() { return mSock != -1 && mWriteSock != -1; }
|
|
void closeSocks() { close(mSock); close(mWriteSock); mSock = mWriteSock = -1; }
|
|
static bool isLoopbackSocket(const inet_diag_msg *msg);
|
|
};
|
|
|
|
} // namespace net
|
|
} // namespace android
|
|
|
|
#endif // _SOCK_DIAG_H
|