サーバーに接続されているクライアントのすべてのポート番号をリンク リストに保存しました。サーバーに接続されているすべてのクライアントにメッセージを送信したい。したがって、client1はメッセージをサーバーに送信し、サーバーはこのメッセージを接続されている他のすべてのクライアントに送信しますが、すべてのクライアント.portsを保存したsend（）でリンクリストをどのように渡す必要がありますか.....（私はTCP / IPを使用しました、スレッディング)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#define MYPORT 2012
#define BACKLOG 10
void *Myfunction(void *arg);
struct NODE
{
int port;
struct NODE *next;
};
void insert(struct NODE *list, int new_fd);
void display(struct NODE *list);
struct NODE *list;
int new_fd;
int n;
//int i,port[10],*ptr;
char buffer[4096];
//char msg[] ="a";
int main()
{
struct sockaddr_in serv_addr,cli_addr;
int sockfd;
int cli_len,n;
list = (struct NODE *)malloc(sizeof(struct NODE));
list->port = 0 ;
list->next = NULL;
pthread_t thr;
//==============socket creating==================================//
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd == -1)
{
printf("server- socket() err");
exit(1);
}
else
printf("server-socket....... created\n");
bzero((char *) &serv_addr, sizeof(serv_addr));
//====================set info=====================================//
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(MYPORT);
serv_addr.sin_addr.s_addr= INADDR_ANY;
//======================bind=======================================//
if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr)) == -1)
{
printf("server-bind failed");
exit(1);
}
else
printf("server-socket bind....... done\n");
//=================listen=====================//
if(listen(sockfd, BACKLOG) == -1)
{
printf("listen error ");
exit(1);
}
else
printf("server-listening....... start\n");
//=============client addr=================//
cli_len = sizeof(cli_addr);
//printf("%d\n",cli_len);
while(1)
{
new_fd = accept(sockfd, (struct sockaddr *)&cli_addr, &cli_len);
insert(list, new_fd);
display(list);
/*port[i]=new_fd;
i++;
ptr=&port[i];*/
pthread_create( &thr ,NULL ,Myfunction ,(void *) list);
//printf("client joined is %s \n",inet_ntoa(cli_addr.sin_addr.s_addr));
printf("client joined port %d \n",cli_addr.sin_port);
}
pthread_join(thr, NULL);
return 0;
}
void *Myfunction(void *Arg)
{
int size;
int Client = (int)Arg;
while(1)
{
bzero(buffer,4096);
//size=recv(Client, buffer , sizeof(buffer) , 0);
//buffer[size] = '\0';
//printf("%s\n" , buffer);
n = read(new_fd,buffer,4096);
//scanf("%s", (char *) &msg);
//send(Client,buffer,sizeof(buffer),0);
printf("new message: %s\n",buffer);
//printf("process id: %d\n", getpid());
//printf("thread id: %u\n", (unsigned int)pthread_self());
//fgets(buffer,4096,stdin);
n = write(new_fd,buffer,strlen(buffer));
if (n < 0) error("ERROR writing to socket");
}
close(new_fd);
}
void insert(struct NODE *list, int new_fd)
{
while(list->next != NULL)
list = list->next;
list->next = (struct NODE *)malloc(sizeof(struct NODE));
list->next->port = new_fd;
list->next->next = NULL;
}
void display(struct NODE *list){
while(list->next != NULL)
{
printf("%d \n", list->port);
list = list->next;
}
printf("%d\n", list->port);}
そしてクライアントコード___>>>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define DEST_PORT 2012
int main()
{
int sockfd,n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[4096];
//char msg[] ="a";
int size;
const char *host= "EICPU3138";
sockfd = socket(AF_INET, SOCK_STREAM, 0);
printf("Client-socket() is OK...\n");
server = (struct hostent *)gethostbyname(host);
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(DEST_PORT);
if(connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) == -1)
{
printf("Client-connect() error ");
exit(1);
}
else
printf("Client-connect() is OK...\n");
while(1)
{
printf(" enter message: ");
bzero(buffer,4096);
fgets(buffer,4096,stdin);
n = write(sockfd,buffer,strlen(buffer));
if (n < 0)
printf("ERROR writing to socket");
bzero(buffer,256);
//Get msg
/* scanf("%s", (char *) &msg);
//Sending message to server
send(sockfd,buffer,sizeof(buffer),0);
size=recv(sockfd , buffer , sizeof(buffer) , 0);
buffer[size] = '\0';
printf("%s\n" , buffer);*/
n = read(sockfd,buffer,4096);
if (n < 0)
error("ERROR reading from socket");
printf("%s\n",buffer);
}
//close(sockfd);
printf("client out\n");
return 0;
}