On Tue, 31 May 2005, shiner chen wrote:
In order to test the process of connection of socket in kernel ,I wrote
a kld . When i load the kld ,the code try to connect the server of
ftp,but i foud the code does not work right . the function , connect
,which return is right ,but ,when i see the status of connection by
"netstat -a" , i found the connection didn't establish! the detailed
code is attached the following code have mistake!! The platform is
freebsd 5.3
/* create socket */
td=curthread;
sock.domain = AF_INET;
sock.type = SOCK_STREAM;
sock.protocol = 0;
st = socket(td, &sock);
/* does create ok? */
if( st != 0 )
{ /* create error */
log(LOG_DEBUG,"create socket error!\n");
goto main_shutdown;
}
printf("the fd of socket is%d\n",control_fd);
How do you initialize the value of "control_fd"? You need to load it out
of td->td_reval[0].
What thread is this running in?
/* has create one ok socket */
printf("the socket is created!");
/////////////////////////////////////////////////////////////////
there are some mistake here!!!!
/*connect*/
bzero(&sa_in, sizeof sa_in);
sa_in.sin_family = AF_INET;
/*this is port of ftp*/
sa_in.sin_port = htons(21);
/*this is my computer ip:172.19.11.8*/
sa_in.sin_addr.s_addr = htonl((((((172 << 8) | 19) << 8) | 11) << 8) |
48);
conn.s=control_fd ;
conn.name=(char*) &sa_in;
conn.namelen=sizeof(sa_in);
/*why do not i connect the server of ftp*/
nError=connect(td,&conn);
if (!nError){
Shouldn't you check for "nError != 0" here? If this is the real code,
it's probably the case that you're getting EBADF back because you didn't
set control_fd to the real file descriptor number.
Robert N M Watson
printf("connect failed!");
goto main_shutdown;
} ;
printf("connect is secusess!");
---------------------------------
DO YOU YAHOO!?
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