关于socket写了无数遍了

编程技术  /  houtizong 发布于 3年前   77

#include    <stdio.h>#include    <sys/socket.h>#include    <netinet/in.h>#define MAXLINE     4096#define bzero(ptr,n)        memset(ptr, 0, n)#define SA  struct sockaddrintmain(int argc, char **argv){    int                 sockfd, n;    char                recvline[MAXLINE + 1];    struct sockaddr_in  servaddr;    if (argc != 2)        printf("usage: a.out <IPaddress>");    if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)        printf("socket error");    bzero(&servaddr, sizeof(servaddr));    servaddr.sin_family = AF_INET;    servaddr.sin_port   = htons(13);    /* daytime server */    if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)        printf("inet_pton error for %s", argv[1]);    if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0)        printf("connect error");    while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {        recvline[n] = 0;    /* null terminate */        if (fputs(recvline, stdout) == EOF)            printf("fputs error");    }    if (n < 0)        printf("read error");    exit(0);}

unpv上的源码为

#include    "unp.h"intmain(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(13);    /* 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);}