127 lines
2.2 KiB
C
127 lines
2.2 KiB
C
#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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/*
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监听后，一直处于accept阻塞状态，
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直到有客户端连接，
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当客户端如数quit后，断开与客户端的连接
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*/
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int main(int args, char** argv)
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{
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int fd;
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struct sockaddr_in server_addr;
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struct sockaddr_in clientAddr;
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int addr_len = sizeof(clientAddr);
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int client;
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char buffer[200];
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int iDataNum;
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char ip[] = "192.168.209.193";
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char *str = ip;
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uint16_t port = 61;
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//建立socket
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if(fd == -1)
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{
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printf("socket failed");
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return -1;
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}
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bzero(&server_addr, sizeof(server_addr));
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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printf("the value of str:%s\n", str);
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//将IP地址转换成网络字节序
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int ret = inet_pton(AF_INET, str, &server_addr.sin_addr);
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printf("the value of ret is:%d\n",ret);
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printf("inet_pton:0x%x\n", server_addr.sin_addr.s_addr);
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if(ret < 0)
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{
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printf("error");
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return -1;
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}
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int i = bind(fd, (struct sockaddr *)&server_addr, sizeof(server_addr));
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printf("the value of i is :%d\n", i);
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if(i < 0)
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{
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printf("bind error");
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return -1;
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}
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//开启监听，第二个参数是最大监听数
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listen(fd,5);
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if(listen(fd, 5) < 0)
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{
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printf("listen error");
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return -1;
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}
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while(1)
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{
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printf("监听端口: %d\n", port);
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client = accept(fd, (struct sockaddr*)&clientAddr, (socklen_t*)&addr_len);
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if(client < 0)
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{
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printf("accept error");
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continue;
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}
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printf("等待消息...\n");
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printf("IP is %s\n", inet_ntoa(clientAddr.sin_addr));
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printf("Port is %d\n", htons(clientAddr.sin_port));
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while(1)
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{
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printf("读取消息:");
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buffer[0] = '\0';
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iDataNum = recv(client, buffer, 1024, 0);
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if(iDataNum < 0)
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{
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printf("recv null");
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continue;
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}
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buffer[iDataNum] = '\0';
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if(strcmp(buffer, "quit") == 0)
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break;
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printf("%s\n", buffer);
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printf("发送消息:");
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scanf("%s", buffer);
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printf("\n");
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send(client, buffer, strlen(buffer), 0);
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if(strcmp(buffer, "quit") == 0)
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break;
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}
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}
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close(fd);
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return 0;
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}
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