1 #ifndef _SOCKET_CLIENT_H 2 #define _SOCKET_CLIENT_H 3 4 #include "List.h" 5 6 #include <pthread.h> 7 #include <cutils/atomic.h> 8 #include <sys/types.h> 9 10 class SocketClient { 11 int mSocket; 12 bool mSocketOwned; 13 pthread_mutex_t mWriteMutex; 14 15 /* Peer process ID */ 16 pid_t mPid; 17 18 /* Peer user ID */ 19 uid_t mUid; 20 21 /* Peer group ID */ 22 gid_t mGid; 23 24 /* Reference count (starts at 1) */ 25 pthread_mutex_t mRefCountMutex; 26 int mRefCount; 27 28 int mCmdNum; 29 30 bool mUseCmdNum; 31 32 public: 33 SocketClient(int sock, bool owned); 34 SocketClient(int sock, bool owned, bool useCmdNum); 35 virtual ~SocketClient(); 36 37 int getSocket() { return mSocket; } 38 pid_t getPid() const { return mPid; } 39 uid_t getUid() const { return mUid; } 40 gid_t getGid() const { return mGid; } 41 void setCmdNum(int cmdNum) { android_atomic_release_store(cmdNum, &mCmdNum); } 42 int getCmdNum() { return mCmdNum; } 43 44 // Send null-terminated C strings: 45 int sendMsg(int code, const char *msg, bool addErrno); 46 int sendMsg(int code, const char *msg, bool addErrno, bool useCmdNum); 47 48 // Provides a mechanism to send a response code to the client. 49 // Sends the code and a null character. 50 int sendCode(int code); 51 52 // Provides a mechanism to send binary data to client. 53 // Sends the code and a null character, followed by 4 bytes of 54 // big-endian length, and the data. 55 int sendBinaryMsg(int code, const void *data, int len); 56 57 // Sending binary data: 58 int sendData(const void *data, int len); 59 60 // Optional reference counting. Reference count starts at 1. If 61 // it's decremented to 0, it deletes itself. 62 // SocketListener creates a SocketClient (at refcount 1) and calls 63 // decRef() when it's done with the client. 64 void incRef(); 65 bool decRef(); // returns true at 0 (but note: SocketClient already deleted) 66 67 // return a new string in quotes with '\\' and '\"' escaped for "my arg" transmissions 68 static char *quoteArg(const char *arg); 69 70 private: 71 // Send null-terminated C strings 72 int sendMsg(const char *msg); 73 void init(int socket, bool owned, bool useCmdNum); 74 75 // Sending binary data. The caller should use make sure this is protected 76 // from multiple threads entering simultaneously. 77 // returns 0 if successful, -1 if there is a 0 byte write and -2 if any other 78 // error occurred (use errno to get the error) 79 int sendDataLocked(const void *data, int len); 80 }; 81 82 typedef android::sysutils::List<SocketClient *> SocketClientCollection; 83 #endif 84
