加班到十点，没有时间，弄个输出套接字接收和返回的Buffer大小的程序

write by 九天雁翎(JTianLing) -- blog.csdn.net/vagrxie

讨论新闻组及文件

在Ubuntu8.04桌面版下，测试的结果为

Socket default Receive Buffer is 87380

Socket default Send Buffer is 16384

与作者在freebsd4.8中的稍有不同，接收缓冲区略大，发送缓冲区略小。

作者得出的结果分别是57344,32768

在我的系统中，接收的缓存实在是够大

源代码：

1 #include"unp.h"
2
3 intmain(intargc, char**argv)
4 {
5 intsockfd, n;
6 /* struct sockaddr_inservaddr; */
7 intliRcvSize = 0;
8 socklen_t liRcvLen = sizeof(liRcvSize);
9 intliSndSize = 0;
10 socklen_t liSndLen = sizeof(liSndSize);
11
12 if((sockfd = Socket(AF_INET, SOCK_STREAM, 0)) < 0)
13 {
14 err_sys("Socket Create failed/n");
15 }
16
17 if( ( n = getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &liRcvSize, &liRcvLen) ) < 0)
18 {
19 err_sys("getsocketopt recv buffer run failed/n");
20 }
21
22 if( ( n = getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &liSndSize, &liSndLen) ) < 0)
23 {
24 err_sys("getsocketopt send buffer run failed/n");
25 }
26
27 close(sockfd);
28
29 printf("Socket default Receive Buffer is %d/n", liRcvSize);
30 printf("Socket default Send Buffer is %d/n", liSndSize);
31
32
33 exit(0);
34 }

Thread model: posix

gcc version 4.2.4 (Ubuntu 4.2.4-1ubuntu4)

纯ANSI C程序

write by 九天雁翎(JTianLing) -- blog.csdn.net/vagrxie