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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define MAXLINE 1000
#define SERV_PORT 9931
void
doprocessing(int
sock, struct
sockaddr_in cliaddr)
{
int
n;
char
str[INET_ADDRSTRLEN];
char
*buf = (char
*)malloc(MAXLINE);
char
*reply = (char
*)malloc(MAXLINE*2);
memset(buf, ‘\0‘, MAXLINE);
while
(1) {
n = read(sock, buf, MAXLINE);
strcpy(reply,"I got your message: ");
if
(n < 0) {
perror("Error reading from socket!");
return;
} else
{
printf("Connect from %s:%d\n", inet_ntop(AF_INET, &cliaddr.sin_addr, str, sizeof(str)), ntohs(cliaddr.sin_port));
strcat(reply,buf);
printf("receive %s\n",buf);
write(sock, reply, MAXLINE);
}
memset(buf,0,sizeof(char)*MAXLINE);
memset(reply,0,sizeof(char)*MAXLINE);
}
free(reply);
free(buf);
}
int
main(void)
{
struct
sockaddr_in servaddr, cliaddr;
int
listenfd, connfd, pid;
socklen_t cliaddr_len = sizeof(cliaddr);
listenfd = socket(AF_INET, SOCK_STREAM, 0);
if
(listenfd < 0) {
perror("Error opening socket!");
exit(-1);
}
memset(&servaddr, 0, sizeof(struct
sockaddr_in));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = inet_addr("10.13.81.182");
servaddr.sin_port = htons(SERV_PORT);
bind(listenfd, (struct
sockaddr *)&servaddr, sizeof(servaddr));
listen(listenfd, 2000);
printf("server服务器开始等待客户端连接 ...\n");
while
(1) {
connfd = accept(listenfd, (struct
sockaddr *)&cliaddr, &cliaddr_len);
pid = fork();
if
(pid == -1) {
perror("call to fork");
exit(-1);
} else
if (pid == 0) {
close(listenfd);
doprocessing(connfd, cliaddr);
exit(0);
} else
{
close(connfd);
}
}
return
0;
}
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