unp的hello word

unp的hello word

最近无聊，再学学unp吧。学学网络编程。下面是一个demo：

intro/daytimetcpcli.c
#include    "unp.h"int
main(int argc, char **argv)
{int                    sockfd, n;char                recvline[MAXLINE + 1];struct sockaddr_in    servaddr;if (argc != 2)err_quit("usage: a.out <IPaddress>");if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)err_sys("socket error");bzero(&servaddr, sizeof(servaddr));servaddr.sin_family = AF_INET;servaddr.sin_port   = htons(8888);    /* daytime server */if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)err_quit("inet_pton error for %s", argv[1]);if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0)err_sys("connect error");while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {recvline[n] = 0;    /* null terminate */if (fputs(recvline, stdout) == EOF)err_sys("fputs error");}if (n < 0)err_sys("read error");exit(0);
}

intro/daytimetcpsrv.c
#include    "unp.h"
#include    <time.h>int
main(int argc, char **argv)
{int                    listenfd, connfd;struct sockaddr_in    servaddr;char                buff[MAXLINE];time_t                ticks;listenfd = Socket(AF_INET, SOCK_STREAM, 0);bzero(&servaddr, sizeof(servaddr));servaddr.sin_family      = AF_INET;servaddr.sin_addr.s_addr = htonl(INADDR_ANY);servaddr.sin_port        = htons(8888);    /* daytime server */Bind(listenfd, (SA *) &servaddr, sizeof(servaddr));Listen(listenfd, LISTENQ);for ( ; ; ) {connfd = Accept(listenfd, (SA *) NULL, NULL);ticks = time(NULL);snprintf(buff, sizeof(buff), "%.24srn", ctime(&ticks));Write(connfd, buff, strlen(buff));Close(connfd);}
}

下面说一下怎么运行。

dzhwen@deng:~/unpv13e/intro$ gcc -w daytimetcpsrv.c ../lib/wrapsock.c ../lib/error.c ../lib/wrapunix.c -o testsrv
dzhwen@deng:~/unpv13e/intro$ gcc -w daytimetcpcli.c ../lib/error.c -o test
dzhwen@deng:~/unpv13e/intro$ ./testsrv

dzhwen@deng:~/unpv13e/intro$ ./test 127.1.1.1
Thu May  8 23:49:43 2014

成功！

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