2 * Copyright (C) 2016 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
21 #include <sys/socket.h>
23 #include <linux/netlink.h>
24 #include <linux/sock_diag.h>
25 #include <linux/inet_diag.h>
30 #include "Permission.h"
31 #include "UidRanges.h"
39 static const int kBufferSize = 4096;
41 // Callback function that is called once for every socket in the dump. A return value of true
42 // means destroy the socket.
43 typedef std::function<bool(uint8_t proto, const inet_diag_msg *)> DumpCallback;
45 struct DestroyRequest {
48 } __attribute__((__packed__));
50 SockDiag() : mSock(-1), mWriteSock(-1), mSocketsDestroyed(0) {}
52 virtual ~SockDiag() { closeSocks(); }
54 int sendDumpRequest(uint8_t proto, uint8_t family, uint32_t states);
55 int sendDumpRequest(uint8_t proto, uint8_t family, const char *addrstr);
56 int readDiagMsg(uint8_t proto, DumpCallback callback);
57 int sockDestroy(uint8_t proto, const inet_diag_msg *);
58 // Destroys all sockets on the given IPv4 or IPv6 address.
59 int destroySockets(const char *addrstr);
60 // Destroys all sockets for the given protocol and UID.
61 int destroySockets(uint8_t proto, uid_t uid, bool excludeLoopback);
62 // Destroys all "live" (CONNECTED, SYN_SENT, SYN_RECV) TCP sockets for the given UID ranges.
63 int destroySockets(const UidRanges& uidRanges, const std::set<uid_t>& skipUids,
64 bool excludeLoopback);
65 // Destroys all "live" (CONNECTED, SYN_SENT, SYN_RECV) TCP sockets that no longer have
66 // the permissions required by the specified network.
67 int destroySocketsLackingPermission(unsigned netId, Permission permission,
68 bool excludeLoopback);
71 friend class SockDiagTest;
74 int mSocketsDestroyed;
75 int sendDumpRequest(uint8_t proto, uint8_t family, uint32_t states, iovec *iov, int iovcnt);
76 int destroySockets(uint8_t proto, int family, const char *addrstr);
77 int destroyLiveSockets(DumpCallback destroy, const char *what, iovec *iov, int iovcnt);
78 bool hasSocks() { return mSock != -1 && mWriteSock != -1; }
79 void closeSocks() { close(mSock); close(mWriteSock); mSock = mWriteSock = -1; }
80 static bool isLoopbackSocket(const inet_diag_msg *msg);
83 #endif // _SOCK_DIAG_H