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发表于 2004-5-31 22:22:07
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显示全部楼层
看一下置顶推荐的那本书的嵌入式Linux网络功能实现部分
说明在书上,源码在这:
client.c
[php]
/*
* A simple C/S mode communication example demo
*
* client.c
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#define PORT 2000
#define MAXDATASIZE 100
int main(int argc, char *argv[])
{
int sockfd, numbytes;
char buf[MAXDATASIZE];
struct hostent he;
struct sockaddr_in their_addr;
if(argc != 2){
fprintf(stderr, "usage: client hostname\n");
exit(1);
}
if((he = gethostbyname(argv[1])) == NULL){
herror("gethostbyname");
exit(1);
}
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
perror("sockfd");
exit(1);
}
their_addr.sin_family = AF_INET;
their_addr.sin_port = htons(PORT);
their_addr.sin_addr = *((struct in_addr *)he.h_addr);
bzero(&(their_addr.sin_zero), 8);
if(connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) == -1){
perror("connect");
exit(1);
}
if((numbytes = recv(sockfd, buf, MAXDATASIZE, 0)) == -1){
perror("recv");
exit(1);
}
buf[numbytes] = '\0';
printf("Received: %S", buf);
close(sockfd);
return 0;
}
[/php]
servise.c
[php]
/*
*
*
*
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/wait.h>
#include <sys/socket.h>
#define MYPORT 2000
#define BACKLOG 10
main()
{
int sock_fd, new_fd;
struct sockaddr_in my_addr;
struct sockaddr_in their_addr;
int sin_size;
if((sock_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
perror("socket");
exit(1);
}
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(MYPORT);
my_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(my_addr.sin_zero),8);
if(bind(sock_fd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1){
perror("bind");
exit(1);
}
if(listen(sock_fd, BACKLOG) == -1){
perror("listen");
exit(1);
}
while(1){
sin_size = sizeof(struct sockaddr_in);
if((new_fd = accept(sock_fd, (struct sockaddr *)&their_addr, &sin_size)) == -1){
perror("accept");
continue;
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
if(!fork()){
if(send(new_fd, "Hello,World!\n",14,0) == -1){
perror("send");
close(new_fd);
exit(1);
}
close(new_fd);
}
}
while(waitpid(-1, NULL, WNOHANG) > 0);
}
[/php]
兄弟得自己调试了,这段时间比较紧张啊 |
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