Socket related programs: port from Windows to Linux

Article Title: Socket related programs: port from Windows to Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

Notes for porting socket-related programs from windows to linux

1) header file

Winsock. h/winsock2.h in windows

Sys/socket. h in linux

Error Handling: errno. h

2) initialization

WSAStartup is required for windows.

Not required in linux

3) Disable socket

Closesocket (...) in windows (......)

Close (...) in linux (......)

4) Type

SOCKET in windows

Int in linux

For example, some macros I use:

# Ifdef WIN32

Typedef int socklen_t;

Typedef int ssize_t;

# Endif

# Ifdef _ LINUX __

Typedef int SOCKET;

Typedef unsigned char BYTE;

Typedef unsigned long DWORD;

# Define FALSE 0

# Define SOCKET_ERROR (-1)

# Endif

5) Get the error code

Getlasterror ()/WSAGetLastError () in windows ()

Errno variable in linux

6) set non-blocking

Ioctlsocket () in windows ()

Fcntl () in linux ()

7) The last parameter of the send Function

In windows, it is generally set to 0.

In linux, it is best to set MSG_NOSIGNAL. If this parameter is not set, the program may exit after an error occurs.

8) millisecond-level acquisition

GetTickCount () in windows ()

Gettimeofday () in linux ()

Multithreading

Multithreading: (win) process. h --> (linux) pthread. h

_ Beginthread --> pthread_create

_ Endthread --> pthread_exit