BSDSocket 常用设置

#ifndef __XOSSTACK_DEFS_LINUX_H__#define __XOSSTACK_DEFS_LINUX_H__#include <sys/types.h>#include <netinet/in.h>#include <arpa/inet.h>#include <sys/socket.h>#include <sys/stat.h>#include <time.h>#include <sys/times.h>#include <unistd.h>#include <fcntl.h> #include <errno.h>#include <netdb.h>#include <stdarg.h>#include <pthread.h>#include <stdarg.h>#include <dirent.h>#include <pwd.h>#include <grp.h>#include <signal.h>#include <sys/wait.h>#include <stdarg.h>//socket句柄类型#define XOS_SOCKET int//非法socket值#define XOS_INVALID_SOCKET (-1)//将socket设置成阻塞模式,s为socket句柄,以下同#define xos_setsockblock(s) \{ \int __opts; \__opts = fcntl((int)s, F_GETFL); \__opts = (__opts & ~O_NONBLOCK); \fcntl((int)s, F_SETFL, __opts); \}//将socket设置成非阻塞模式#define xos_setsocknonblock(s) \{ \int __opts; \__opts = fcntl((int)s, F_GETFL); \__opts = (__opts | O_NONBLOCK); \fcntl((int)s, F_SETFL, __opts); \}//将socket设置成端口可重用#define xos_setsockreuseaddr(s) \{ \int __bReuseAddr = 1; \setsockopt((int)s, SOL_SOCKET, SO_REUSEADDR, (char *)&__bReuseAddr, sizeof(__bReuseAddr)); \}//将socket设置成能够收发广播包#define xos_setsockbroadcast(s) \{ \int __optval = 1; \setsockopt((int)s, SOL_SOCKET, SO_BROADCAST, (char *)&__optval, sizeof(__optval)); \}//将socket加入指定的组播组,i为32位组播地址#define xos_setsockaddmulticast(s, i) \{ \struct ip_mreq __mreq; \__mreq.imr_interface.s_addr = INADDR_ANY; \__mreq.imr_multiaddr.s_addr = i; \setsockopt((int)s, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&__mreq, sizeof(__mreq)); \}//将socket从指定的组播组中删除,i同上#define xos_setsockdropmulticast(s, i) \{ \struct ip_mreq __mreq; \__mreq.imr_interface.s_addr = INADDR_ANY; \__mreq.imr_multiaddr.s_addr = i; \setsockopt((int)s, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *)&__mreq, sizeof(__mreq)); \}//设置socket接收缓冲大小,i为缓冲大小#define xos_setsockrecvbuf(s, i) \{ \int __i = i; \setsockopt((int)s, SOL_SOCKET, SO_RCVBUF, (char *)&__i, sizeof(__i)); \}//设置socket发送缓冲大小,i同上#define xos_setsocksendbuf(s, i) \{ \int __i = i; \setsockopt((int)s, SOL_SOCKET, SO_SNDBUF, (char *)&__i, sizeof(__i)); \}//设置socket等待时间,o表示是否使能等待,l表示等待时间,单位秒//LINUX是否要设置还未知,好像不设置会出问题的,所以又设置了//LINUX不能设置,如果设置了,关闭的时候就会等待设置的linger时间#define xos_setsocklinger(s, o, l) \{ \struct linger __Linger; \__Linger.l_onoff = o; \__Linger.l_linger = l; \setsockopt((int)s, SOL_SOCKET, SO_LINGER, (char*)&__Linger, sizeof(__Linger)); \}//设置socket为非延迟模式,//具体含义不是太明白.根据平台不同而不同,一般不设这个#define xos_setsocknodelay(s) \/*{ \int __one = 1; \setsockopt((int)s, IPPROTO_TCP, TCP_NODELAY, (char*)&__one, sizeof(int)); }*///设置socket为保持连接//不是所有平台都支持#define xos_setsockkeepalive(s) \{ \int __one = 1; \setsockopt((int)s, SOL_SOCKET, SO_KEEPALIVE, (char*)&__one, sizeof(int)); \}#define setsockrecverr(s) /*\{ \int __optval = 1; \setsockopt((int)s, SOL_IP, IP_RECVERR, (char *)&__optval, sizeof(__optval)); \}*/#endif //__XOSSTACK_DEFS_LINUX_H__

原文链接（http://chenshun87.blog.163.com/blog/static/18859389201110501055773/）