Kernel land socket connect timeout
once again, i need your help to my kernel module. I have implemented an client module, but each time, connect function return errno=110 (Timeout). I don't understand why ? To test this module, i've started netcat in listen mode (nc -vl -p4242). Do you have any suggestion about this mystical bug
int init_module(void)
{
struct socket* sock = NULL;
struct sockaddr_in* dest = {0};
int retVal = 0;
dest = (struct sockaddr_in*)kmalloc(sizeof(struct sockaddr_in), GFP_KERNEL);
sock_create(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
dest->sin_family = AF_INET;
dest->sin_addr.s_addr = htonl(in_aton("127.0.0.1"));
dest->sin_port = htons(4242);
printk(KERN_EMERG "Connect to %X:%u\n", dest->sin_addr.s_addr, 4242);
retVal = sock->ops->connect(sock, (struct sockaddr*)dest, sizeof(struct sockaddr_in), !O_NONBLOCK);
if (retVal >= 0) {
printk(KERN_EMERG "Connected\n");
sock_release(sock);
}
else
printk(KERN_EMERG "Error %d\n", -retVal);
return (0);
}
Debug output (dmesg)
Message from syslogd@century at Sun Ju开发者_开发百科n 19 08:41:33 2011 ...
century kernel: Connect to 7F000001:4242
Message from syslogd@century at Sun Jun 19 08:41:54 2011 ...
century kernel: Error 110
Error code 110 is "Timeout".
in_aton("127.0.0.1");
already gives the address in network byte order.
By doing htonl(in_aton("127.0.0.1"));
you're actually trying to connect to 1.0.0.127
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