linux socket各种函数

数据结构：

socket通用定义

struct sockaddr {u_char    sa_len;u_short   sa_family；char   sa_data[14];//14B}

socket PF_INET协议族定义

struct sockaddr_in { u_char    sin_len;u_short   sin_family；u_short    sin_port；//2Bstruct in_addr   sin_addr;//4Bchar   sin_zero[8];//8B}struct in_addr {    u_long s_addr;};

struct hostent {char    *h_name;char       **h_aliases;int     h_addrtype;int     h_length;char    **h_addr_list;};

公共函数

int Socket( int domain, int type, int protocol)int bind(int sockfd,struct sockaddr * my_addr,int addrlen)int connect（int sockfd,struct sockaddr *server_addr,int sockaddr_len）close(int sockfd);uint32_t  htonl(uint32_t hostlong);uint16_t  htons(uint16_t hostshort);uint32_t  ntohl(uint32_t netlong); uint16_t  ntohs(uint16_t netshort);  int inet_aton(const char *string, struct in_addr*addr);in_addr inet_addr(const char *cp)in_addr inet_network(const char *cp)char *inet_ntoa (struct in_addr in)inet_netof()inet_lnaof()inet_ntop()int inet_pton(int af, const char *src, void *dst);const char *inet_ntop(int af, const void *src,char *dst, socklen_t cnt);issockettype(int sockfd)gethostbyaddr()struct hostent *gethostbyname(const char *name);struct hostent * gethostbyaddr(const void *addr, int len, int type);

tcp全套

int listen(int sockfd,int input_queue_size)int accept(int sockfd, struct sockaddr *addr, int *addrlen); int send(int sockfd, const void * data, int data_len, unsigned int flags)int recv(int sockfd, void *buf, int buf_len,unsigned int flags); 

udp全套

int sendto(int sockfd, const void * data, int data_len, unsigned int flags, struct sockaddr *remaddr,sock_len remaddr_len）int recvfrom(int sockfd, void *buf, int buf_len,unsigned int flags,struct sockaddr *from,sock_len *fromlen);