A little note (2): Socket network programming

The flow of network communication:

Server-side
Request socket, bind socket to local, open port---listening port--wait for message---Read message

Client
Request socket-to-server initiated connection, you can send a message at any time after successful connection

What is a socket?
http://baike.baidu.com/link?url=BfywKEhH0b4vASGaFSZw9Dwwh2hQgV2DdE4POM2_5Xl80RK1_2hbH3YFQaFzfrxKeqh8SbcMcgRTP-Wj88Zb5a

A simple connection between a server and a client, the client sends a message, the server receives the message

Run the program with the console by using the startup parameter: C or S to run the client or server program

Query for related functions:

Int
Wsaapi
WSAStartup (
_in_ WORD wversionrequested,
_out_ Lpwsadata Lpwsadata
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fwsastartup); K ( WSAStartup); K (devlang-c%2b%2b); K (targetos-windows) &rd=true

Int
Wsaapi
WSACleanup (
void
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fwsacleanup); K ( WSACleanup); K (devlang-c%2b%2b); K (targetos-windows) &rd=true

SOCKET
Wsaapi
Socket
_in_ int AF,
_in_ int type,
_in_ INT protocol
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fsocket); K (socket) ; K (devlang-c%2b%2b); K (targetos-windows) &rd=true

Int
Wsaapi
Closesocket (
_in_ SOCKET S
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fclosesocket); K ( closesocket); K (devlang-c%2b%2b); K (targetos-windows) &rd=true

Int
Wsaapi
Bind
_in_ SOCKET S,
_in_reads_bytes_ (namelen) const struct SOCKADDR FAR * name,
_in_ int Namelen
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fbind); K (bind); K ( DEVLANG-C%2B%2B); K (targetos-windows) &rd=true

Int
Wsaapi
Listen
_in_ SOCKET S,
_in_ int Backlog
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2flisten); K (Listen) ; K (devlang-c%2b%2b); K (targetos-windows) &rd=true

SOCKET
Wsaapi
Accept
_in_ SOCKET S,
_out_writes_bytes_opt_ (*addrlen) struct sockaddr far * addr,
_inout_opt_ int FAR * Addrlen
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (winsock2%2faccept); K (Accept) ; K (devlang-c%2b%2b); K (targetos-windows) &rd=true

Int
Wsaapi
Recv
_in_ SOCKET S,
_out_writes_bytes_to_ (len, return) __out_data_source (NETWORK) Char FAR * buf,
_in_ int Len,
_in_ int Flags
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (WINSOCK2%2FRECV); K (recv); K ( DEVLANG-C%2B%2B); K (targetos-windows) &rd=true

Int
Wsaapi
Connect
_in_ SOCKET S,
_in_reads_bytes_ (namelen) const struct SOCKADDR FAR * name,
_in_ int Namelen
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (Winsock2%2fconnect); K ( connect); K (devlang-c%2b%2b); K (targetos-windows) &rd=true

U_long
Wsaapi
HTONL (
_in_ U_long Hostlong
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (winsock2%2fhtonl); K (htonl); k (devlang-c%2b%2b); K (targetos-windows) &rd=true

U_short
Wsaapi
Htons
_in_ U_short Hostshort
);
Msdn:
Https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k (winsock2%2fhtons); K (htons); k (devlang-c%2b%2b); K (targetos-windows) &rd=true

A little note (2): Socket network programming