我需要我的客戶端綁定到特定端口,然後連接到它的服務器。問題是如果我成功綁定到給定端口但無法連接到服務器。如果我不嘗試綁定到端口,我可以連接到服務器。以下是我的程序:客戶端無法綁定到給定的端口並連接到給定的服務器
int main()
{
int sock, bytes_recieved;
char send_data[1024],recv_data[1024];
struct hostent *host;
struct sockaddr_in server_addr,client_addr;
host = gethostbyname("127.0.0.1");
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Socket");
exit(1);
}
client_addr.sin_family = AF_INET;
client_addr.sin_port = htons(4000);
client_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(client_addr.sin_zero),8);
//host = gethostbyname("192.168.61.67");
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(2404);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(server_addr.sin_zero),8);
if (bind(sock, (struct sockaddr *)&client_addr, sizeof(struct sockaddr))== -1)
{
perror("Unable to bind");
exit(1);
}
else
{
fprintf(stderr,"Client bound to 4000\n");
}
if (connect(sock, (struct sockaddr *)&server_addr,
sizeof(struct sockaddr)) == -1)
{
perror("Connect");
exit(1);
}
else
{
printf("Connected to the server\n");
}
while(1)
{
bytes_recieved=recv(sock,recv_data,1024,0);
recv_data[bytes_recieved] = '\0';
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
{
close(sock);
break;
}
else
printf("\nRecieved data = %s " , recv_data);
printf("\nSEND (q or Q to quit) : ");
gets(send_data);
if (strcmp(send_data , "q") != 0 && strcmp(send_data , "Q") != 0)
send(sock,send_data,strlen(send_data), 0);
else
{
send(sock,send_data,strlen(send_data), 0);
close(sock);
break;
}
}
return 0;
}
在這個程序中,如果我使用本地主機客戶端,我能夠綁定到鍋裏,並連接到服務器成功服務器兩者。如果我將不同的IP提供給服務器,則會出現問題。請建議對代碼進行任何更改以實現我的目標
我認爲它是client_addr.sin_addr.s_addr = INADDR_ANY;感謝您的幫助 – 2012-03-29 13:48:45