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SOCKET( )

SOCKET( ). Socket(). Bind(). client. Listen(). Socket(). Accept(). 連線建立. 等待連線要求. Connect(). Read(). 要求資料. Write(). Write(). 回覆資料. Read(). Read(). 告知傳輸結束. Close(). Close(). Socket(). #include<sys/socket.h> Int socket( int domain, int type , int protocol);

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SOCKET( )

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  1. SOCKET( )

  2. Socket() Bind() client Listen() Socket() Accept() 連線建立 等待連線要求 Connect() Read() 要求資料 Write() Write() 回覆資料 Read() Read() 告知傳輸結束 Close() Close()

  3. Socket() • #include<sys/socket.h> • Int socket( int domain, int type , int protocol); • Domain:指定建立socket的定址協定 • AT_INET(TCP/IP架構) • Type :以值定所建立socket使用之傳輸層協定 • SOCK_STREAM(TCP) • SOCK_DRRAM(UDP) • Protocol :通常設為 0

  4. Bind() • #include<sys/socket.h> • int bind ( int socketfd, const sockaddr*address , size_t addrlen) • Socketfd :socket descriptor ,socket( )之回傳值 • Address :網路位置結構的指標 • Addrlen :sizeof (*address)

  5. Connect() • #include<sys/socket.h> • Int connect(int socketfd,const sockaddr *address, size_t addrlen); • Socketfd :要建立連線之socket descriptor • Address: 網路位置結構指標 • Addrlen:sizeof(*address)

  6. Listen() • #include<sys/socket.h> • Int listen(int socketfd, int backlog); • Socketfd: socket descriptor • Backlog:最大連線數量

  7. Accept() • #include<sys/socket.h> • Int accept( int socketfd, struct sockaddr *cliaddr, socklen_t addrlen); • Socketfd: listening socket descripion • Cliaddr: 連線client 的網路位置資訊 • Addrlen :sizeof(cliaddr)

  8. Read() and write() • #include<sys/socket.h> • Int read( int sockfd ,char *buf, int len); • Socketfd:接收資料之socket description • Buf :儲存讀取資料 • Addrlen : sizeof(buf)

  9. write() • #include<sys/socket.h> • Int write( int sockfd , char *buf, int len); • Socketfd : 傳送資料之socket description • Buf : 儲存讀取資料 • Addrlen: sizeof(buf)

  10. Recv() and send() • #include<sys/socket.h> • Ssize_t recv(int sockfd, void *buf, size_t nbytes, int flag); • Socketfd: 接收資料之socket description • Buf: 儲存讀取資料暫存區 • Addrlen: sizeof(buf) • Flag: 設定函數屬性

  11. send() • #include<sys/socket.h> • Ssize_t send(int sockfd, const void *buf, size_t nbytes , int flag); • Socketfd: 接收資料之socket description • Buf: 儲存讀取資料暫存區 • Addrlen: sizeof(buf) • Flag: 設定函數屬性

  12. Close() • #include<unistd.h> • Int close(int socket); • Sockfd : 欲關閉之socket的socket descriptor

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