Socket programming windows to Linux code porting Problems

Socket programming windows to Linux code porting problems-general Linux technology-Linux programming and kernel information, the following is a detailed description. 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 ()

3. Multithreading
Multithreading: (win) process. h --> (linux) pthread. h
_ Beginthread --> pthread_create
_ Endthread --> pthread_exit