//

// serverC.c

// demo

//

// Created by 世泰 陈 on 15/10/24.

// Copyright (c) 2015年 世泰 陈. All rights reserved.

//

#include <stdio.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <string.h>

#include <netdb.h>

#include <stdlib.h>

#define UDP 23651

#define TCP 25651

struct router {

char name[20];

char cost[20];

};

/*

* function：send itself connection to the client

* The format is from Beej or Internet as http://blog.csdn.net/piaojun_pj/article/details/5920888

*/

void sendmessage()

{

int client_sockfd;

int len =1 ;

struct sockaddr_in remote_addr;//服务器端网络地址结构体

char buf[BUFSIZ];//数据传送的缓冲区

char **pptr;

char str[32];

struct hostent * hptr = gethostbyname("localhost");

// //show the IP address!!!

// switch(hptr->h_addrtype)

// {

// case AF_INET:

// case AF_INET6:

// pptr=hptr->h_addr_list;

// for(; *pptr!=NULL; pptr++)

// printf(" address:%s\n",

// inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));

// printf(" first address: %s\n",

// inet_ntop(hptr->h_addrtype, hptr->h_addr, str, sizeof(str)));

// break;

// default:

// printf("unknown address type\n");

// break;

// }

memset(&remote_addr,0,sizeof(remote_addr)); //数据初始化--清零

pptr= hptr->h_addr_list;

remote_addr.sin_family=PF_INET; //设置为IP通信

//printf(" address:%s\n",inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));

remote_addr.sin_addr.s_addr=inet_addr(inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));//服务器IP地址

int length = sizeof(remote_addr);

//getsockname(client_sockfd, (struct sockaddr *) &remote_addr, (socklen_t *) &length);

//printf("TCP prot number %d ",remote_addr.sin_port);

remote_addr.sin_port=htons(25651); //服务器端口号

printf("The Server C is up and running! \n");

struct router server;

FILE *fp;

int i = 0;

int name;

int cost;

fp = fopen("serverC.txt", "r");

if(fp == NULL)

{

printf("CANNOT OPEN \n");

exit(1);

}

//printf("读取了文件 \r\n");

char buffer[1024];

char buffer2[30];

char message[50];

char *ptr = NULL;

int sin_size=sizeof(struct sockaddr_in);

/*创建客户端套接字--IPv4协议，面向连接通信，TCP协议*/

if((client_sockfd=socket(PF_INET,SOCK_STREAM,0))<0)

{

printf("socket fail ! \r\n");

//return -1;

}

//printf("socket ok !\r\n");

/*将套接字绑定到服务器的网络地址上*/

if(connect(client_sockfd,(struct sockaddr *)&remote_addr,sizeof(struct sockaddr))<0)

{

perror("connect");

//return 1;

}

// printf("connect ok !\r\n");

// printf("connected to server \r\n");

// 获取子socket的port！！！！！！！！

getsockname(client_sockfd, (struct sockaddr *) &remote_addr, (socklen_t *) &length);

//printf("TCP port number %d ",remote_addr.sin_port);

printf("Neighbor------Cost\n");

while(fgets(buffer, 1024, fp) != NULL)

{

printf("%s", buffer);

int len =send(client_sockfd,buffer,1024,0);

}

printf("\n");

printf("The Server C finishe sending its neighbor information to the Client with TCP port number: %d and IP address: %s \n", TCP, inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));

printf("For this connection with Client, the Server C has TCP port number: %d and IP address: %s \n", remote_addr.sin_port,inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));

close(client_sockfd);//关闭套接字

}

/*

* function：receive the topology of the whole internet

*The format is from Beej or Internet as http://blog.csdn.net/piaojun_pj/article/details/5920888

*/

void receiver()

{

int server_sockfd;

int len = 1;

struct sockaddr_in my_addr; //服务器网络地址结构体

struct sockaddr_in remote_addr; //客户端网络地址结构体

int sin_size;

//char buf[BUFSIZ]; //数据传送的缓冲区

char **pptr;

char str[32];

struct hostent * hptr = gethostbyname("localhost");

memset(&my_addr,0,sizeof(my_addr)); //数据初始化--清零

my_addr.sin_family=PF_INET; //设置为IP通信

pptr= hptr->h_addr_list;

my_addr.sin_addr.s_addr=inet_addr(inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));//服务器IP地址--允许连接到所有本地地址上

my_addr.sin_port=htons(UDP); //服务器端口号

//int buf[4];

int matrix[4][4];

int i = 0;

int j = 0;

/*创建服务器端套接字--IPv4协议，面向无连接通信，UDP协议*/

if((server_sockfd=socket(PF_INET,SOCK_DGRAM,0))<0)

{

printf("socket fail ! \r\n");

//return -1;

}

//printf("socket ok !\r\n");

/*将套接字绑定到服务器的网络地址上*/

if (bind(server_sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr))<0)

{

printf("bind fail !\r\n");

//return -1;

}

//printf("bind ok !\r\n");

sin_size=sizeof(struct sockaddr_in);

//printf("waiting for a packet...\n");

/*接收客户端的数据并将其发送给客户端--recvfrom是无连接的*/

while(1)

{

char buf[BUFSIZ];

recvfrom(server_sockfd,buf,BUFSIZ,0,(struct sockaddr *)&remote_addr,&sin_size);

//if(len <= 0) break; 一开始就是len = 0 所以就跳出来了。所以要注释掉，但是为什么呢？？？？？？

matrix[i][j++] = atoi(buf);

if(j >= 4)

{

i++;

j = 0;

}

if(i >= 4) break;

}

printf("The Server C has received the network topology from the Client with UDP port number: %d and IP address: %s \n",TCP,inet_ntoa(remote_addr.sin_addr));

printf("\n");

printf("Edge------Cost\n");

if(matrix[0][1] != 0) printf("AB %d\n",matrix[0][1]);

if(matrix[0][2] != 0) printf("AC %d\n",matrix[0][2]);

if(matrix[0][3] != 0) printf("AD %d\n",matrix[0][3]);

if(matrix[1][2] != 0) printf("BC %d\n",matrix[1][2]);

if(matrix[1][3] != 0) printf("BD %d\n",matrix[1][3]);

if(matrix[2][3] != 0) printf("CD %d\n",matrix[2][3]);

printf("\n");

getsockname(server_sockfd, (struct sockaddr *) &remote_addr, (socklen_t *) &sin_size);

printf("For this connection with Client, The Server C has UDP port number: %d and IP address: %s\n", remote_addr.sin_port, inet_ntoa(remote_addr.sin_addr));

close(server_sockfd);

}

int main(int argc, const char * argv[]) {

// insert code here...

int matrix[4][4];

sendmessage();

receiver();

return 0;

}