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电梯直达

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发表于 2005-08-10 19:12 |只看该作者 |倒序浏览

c服务端程序：

/*
* copyright (C) 1986, 1988 by Larry McVoy.
* MUST be distributed in source form only.
*/
/* server.c 1.0 - main */
# include <stdio.h>;
# include <signal.h>;
# include <sys/types.h>;
# include <sys/socket.h>;
# include <sys/time.h>;
# include <netinet/in.h>;
# include <netdb.h>;
#define MYPORT 6300
#define BACKLOG 10 /* 多少等待连接控制*/
struct sockaddr_in osin,sin = { AF_INET }; /* the rest is null */
main(argc, argv)
char** argv;
{
char buf[128];
int seq, namelen, newsock, sock,netint,count;
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}
sin.sin_port=htons(MYPORT);
//sin.sin_addr.s_addr = inet_addr("52.0.98.222");
sin.sin_addr.s_addr = INADDR_ANY;
bzero(&(sin.sin_zero),sizeof(sin.sin_zero));
if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("bind");
exit(2);
}
namelen = sizeof(sin);
if (getsockname(sock, (struct sockaddr *)&sin,&namelen) < 0) {
perror("getsockname");
exit(3);
}
printf("SERVER:>; Server bound to port %u 0x%x\n", ntohs(sin.sin_port), sin.sin_port);
if (fork())
exit(0);
else printf("SERVER:>; Created a new process!\n");
if (listen(sock, BACKLOG) < 0) {
perror("listen");
exit(4);
} else printf("SERVER:>; listening...\n");
namelen = sizeof(sin);
while(1){
if ((newsock = accept(sock, (struct sockaddr *)&osin,&namelen)) < 0) {
perror("accept");
continue;
}else printf("SERVER:>;CLIENT IP:%s\n",inet_ntoa(osin.sin_addr));
if (!fork()) { /* this is the child process */
if (recv( newsock, buf, sizeof(buf), 0)<0) {
perror("recv");
continue;
}else printf("SERVER:>; recv %s\n",buf);
if (send(newsock, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(newsock);
break;
}
}
close(newsock); /* parent doesn't need this */
printf("SERVER:>; The server program is over now.\n");
}

复制代码

c客户端程序：

/*
* copyright (C) 1986, 1988 by Larry McVoy.
* MUST be distributed in source form only.
*/
# include <stdio.h>;
# include <signal.h>;
# include <errno.h>;
# include <sys/types.h>;
# include <sys/socket.h>;
# include <sys/time.h>;
# include <netinet/in.h>;
# include <netdb.h>;
#define MYPORT 6300
extern errno;
struct timeval zero = { 0, 0 };
main(argc, argv)
char** argv;
{
struct hostent* h;
struct sockaddr_in sin;
char buf[128];
char *sendmsg="999999999|1000|";
int i, sock;
int bytes_send;
if (argc != 2) {
fprintf(stderr, "usage: %s remotehost\n", argv[0]);
exit(0);
}
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}
if (!(h = gethostbyname(argv[1]))) {
perror(argv[1]);
exit(2);
}else printf("The host name is %s\n",h->;h_name);
bzero(&sin, sizeof(sin));
sin.sin_family = AF_INET;
bcopy(h->;h_addr, &sin.sin_addr, h->;h_length);
sin.sin_port = htons(MYPORT);
printf("sin.sin_family is %d:sin.sin_addr is %s:sin.sin_port is %d\n",sin.sin_family,inet_ntoa(sin.sin_addr),ntohs(sin.sin_port));
if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("connect");
}else printf("connect to sock success.\n");
bytes_send=send(sock, sendmsg, strlen(sendmsg), 0);
if (bytes_send < 0) {
perror("send");
}else printf("send to sock :%s.\n", sendmsg);
if (recv(sock, &buf,sizeof(buf),0) < 0) {
perror("recv");
}else printf("recv from sock :%s.\n", buf);
close(sock);
}