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Bind Back

3.1 Bind method

  • bind the local address and the port with sockfd
method
int bind(int sockfd, struct sockaddr* myaddr, int addrlen)
parameters
  • sockfd: socket描述符
  • myaddr: 本機地址
  • addrlen: 地址長度
return value
  • 0: success
  • -1: failure
  • errno: wrong code

3.2 INADDR_ANY

  • 可以綁定任何網絡設備接口, 適用於多IP主機
  • 適用於IP地址經常變化的情況
struct sockaddr_in srvaddr;
srvaddr.sin_addr.s_addr = htonl(INADDR_ANY);

3.3 Some problems

  • 客戶端綁定地址可能出現的問題
    • 服務器主動關閉, 導致鏈接錯誤(被關閉鏈接處於TIME_WAIT狀態)
    • 客戶端主動關閉, 導致綁定錯誤(被關閉鏈接處於TIME_WAIT狀態)
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