C语言：关于socket的基础知识点-白红宇

C语言：关于socket的基础知识点

阅读量：6940 次

发布时间：2019-06-27

本文共 1833 字，大约阅读时间需要 6 分钟。

/** *      ---结构体--- * *      #include 
     
       *      struct sockaddr { *              unsigned short sa_family; *              char sa_data[14]; *      } * *      #include 
      
        *      struct sockaddr_in { *              short int sin_family;           //sa_family_t *              unsigned short sin_port;        //in_port_t *              struct in_addr sin_addr; *              unsigned char sin_zero[8]; *      } * *      #include 
       
         *      sturct in_addr { *              uint32_t s_addr; *      } *//** * --IP转换--- *  ulong inet_addr(const char *ip);    //将一个点分十进制的ip转换成一个网络字节序的长整型数 *  int inet_aton(const char *ip, struct in_addr *inp);         //将一个字符串ip转换成一个32位的网络字节序 *  char *inet_ntoa(sturct in_addr in); *//** * ---域名转换--- *  #include 
        
          *  struct hostent{ *              char *h_name; *              char **h_aliases; *              short h_addrtype; *              short h_length; *              char **h_addr_list; *  } *  #define h_addr h_addr_list[0] *      sturct hostent *h = gethostbyname(const char *hostname); //结果会存在resbuf里边 * *//** * ---字节序转换--- *  #include 
         
           *  uint32_t htonl(uint32_t hostlong) *  uint32_t ntohl(uint32_t hostlong) *      uint16_t htons(unit16_t hostshort) *      uint16_t ntohs(uint16_t hostshort) *//** *  *//** * int socket(int domain, int type, int protocol); * int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen); * int listen(int sockfd, int backlog); * int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen); * int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen); * int send(int sockfd, const void *buf, size_t len, int flags); * int recv(int sockfd, void *buf, size_t len, int flags); */