我试图做一个简单的tcp服务器客户端使用ipv6。它在ipv6和ipv4的同一台机器上工作,但是在不同的机器上ipv6无法连接。无法使用ipv6连接2台计算机(TCP服务器客户端)
服务器代码
int main(int argc, char* argv[])
{
int sockfd,new_fd,rv,yes=1;
struct addrinfo hints,*servinfo,*p;
struct sockaddr_storage their_addr;
socklen_t addr_size;
SOCKET listenSocket,clientSocket;
WSADATA w;
if (WSAStartup(0x0101, &w) != 0)
{
fprintf(stderr, "Could not open Windows connection.\n");
exit(0);
}
//ip=argv[1];
//port=argv[2];
memset(&hints,0,sizeof(hints));
hints.ai_family=AF_INET6;
hints.ai_socktype=SOCK_STREAM;
hints.ai_flags=AI_NUMERICHOST;
if((rv = getaddrinfo("fe80::c0a8:0160","5002",&hints,&servinfo)) != 0)
{
perror("\nGetaddrinfo failed\n");
return 1;
}
//Creating socket
listenSocket = socket(servinfo->ai_family,servinfo->ai_socktype,servinfo->ai_protocol);
if(listenSocket == INVALID_SOCKET)
{
printf("\nSocket failed with error \n");
WSACleanup();
}
//setting non blocking mode
u_long iMode = 1;
rv = ioctlsocket(listenSocket,FIONBIO,&iMode);
if(rv == SOCKET_ERROR)
{
printf("\nioctl failed\n");
WSACleanup();
}
rv = bind(listenSocket,servinfo->ai_addr,(int)servinfo->ai_addrlen);
if(rv == SOCKET_ERROR)
{
perror("\nBind: \n");
}
freeaddrinfo(servinfo);
rv = listen(listenSocket,SOMAXCONN);
if(rv == SOCKET_ERROR)
{
perror("listen");
return 1;
}
// now accept an incoming connection:
char recvbuf[DEFAULT_BUFLEN];
int buflen = DEFAULT_BUFLEN;
SOCKET AcceptSocket;
while (1)
{
AcceptSocket = SOCKET_ERROR;
while (AcceptSocket == SOCKET_ERROR)
{
AcceptSocket = accept(listenSocket, NULL, NULL);
}
printf("Server: Client Connected!\n");
listenSocket = AcceptSocket;
rv = recv(listenSocket,recvbuf,buflen,0);
break;
}
printf("Received %d bytes from client \n",rv);
closesocket(listenSocket);
closesocket(AcceptSocket);
return 0;
}
客户端代码
int main(int argc,char* argv[])
{
struct addrinfo hints,*servinfo,*p;
int rv;
SOCKET connectSocket;
WSADATA w;
if (WSAStartup(0x0101, &w) != 0)
{
fprintf(stderr, "Could not open Windows connection.\n");
exit(0);
}
//resetting memory
memset(&hints,0,sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_NUMERICHOST;
//getting values
if((rv = getaddrinfo("fe80::c0a8:160","5002",&hints,&servinfo)) != 0)
{
perror("Getaddrinfo failed");
return 1;
}
//Creating socket
connectSocket = socket(servinfo->ai_family,servinfo->ai_socktype,servinfo->ai_protocol);
if(connectSocket == INVALID_SOCKET)
{
perror("Socket create : ");
}
rv = connect(connectSocket,servinfo->ai_addr,(int)servinfo->ai_addrlen);
if(rv == SOCKET_ERROR)
{
perror("Socket Connect : ");
}
//free memory
freeaddrinfo(servinfo);
// Send and receive data.
int bytesSent;
char sendbuf[200] = "Client: Sending some test string to server...";
char recvbuf[200] = "";
bytesSent = send(connectSocket, sendbuf, strlen(sendbuf), 0);
printf("Client: send() - Bytes Sent: %ld\n", bytesSent);
closesocket(connectSocket);
return 0;
}
目的只是打印多少字节传输。
正如shinkou回答的那样,你绑定到一个链接本地地址。另一个问题是你绑定到一个静态地址,该静态地址在计算机上工作,它具有该地址,但不适用于任何没有这个确切地址的计算机。我建议绑定到绑定到所有接口的'IN6ADDR_ANY_INIT',以便服务器可以连接到计算机所有的地址上。 –
@JoachimPileborg我已经为机器分配了一个静态ipv6。还有两台机器之间的ping工作正常。 – Antarus
当你把它移动到另一台机器时,你在代码中改变了地址?或者_both_机器具有相同的地址? –