arm中socket函数在哪个头文件中申明？并且af_inet,socker_streamm.0两个函数有什么区别

1、socket函数声明在sys/socket.h中

2、AF_INET、SOCK_STREAM 是2个整型参数，其中：

AF_INET：IPV4 internet协议

SOCK_STREAM：面向连接的全双工字节流通信

addr属于:

#include<netdb.h>

struct addrinfo

{

int ai_flags

int ai_family//AF_INET,AF_INET6,UNIX etc

int ai_socktype//STREAM,DATAGRAM,RAW

int ai_protocol//IPPROTO_IP, IPPROTO_IPV4, IPPROTO_IPV6 etc

size_t ai_addrlen//length of ai_addr

char* ai_canonname//full hostname

struct sockaddr* ai_addr//addr of host

struct addrinfo* ai_next

}

value of ai_falgs:

AI_PASSIVE: Socket address is intended for `bind'.

AI_CANONNAME:Request for canonical name.

AI_NUMERICHOST: Don't use name resolution.

AI_V4MAPPED: IPv4 mapped addresses are acceptable.

AI_ALL: Return IPv4 mapped and IPv6 addresses.

AI_ADDRCONFIG:Use configuration of this host to choose

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