Hey all.
I have some socket code, which binds to a port and then accepts
connections. Every time I try to read() from the socket, I get a EINVAL. I
am sure that I am doing something grossly stupid, and was wondering if
anyone could tell me what I had missed.
Sorry about the big code dump, I have tried to trim it down a bit.
Thanks,
Mikal
--- Code ---
if((socketfd = socket(PF_INET, SOCK_STREAM, 0)) == -1)
switch(errno){
...boring error checking...
}
// We bind to the port number that we want to be listening on
bindaddr.sin_family = AF_INET;
bindaddr.sin_port = htons(8601);
bindaddr.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(socketfd, (struct sockaddr *) &bindaddr, sizeof(bindaddr)) ==
-1)
switch(errno){
...boring error checking...
}
// Listen for connections
if(listen(socketfd, SOMAXCONN) == -1)
switch(errno){
...boring error checking...
}
// Accept connections
connaddrlen = sizeof(struct sockaddr);
while(1){
if(accept(socketfd, (struct sockaddr *) &connaddr, &connaddrlen) ==
-1)
switch(errno){
...boring error checking...
}
// Fork to deal with the requests
switch(fork()){
case 0:
// We are the child
// Now we do something with this connection
printf("Connection from %s, port %d\n",
inet_ntoa(connaddr.sin_addr),
ntohs(connaddr.sin_port));
sleep(5);
// We need to get the port from the connection
read(socketfd, readBuffer, 6) == -1)
switch(errno){
...I always end up in here with an EINVAL...
}
printf("Server reported it was on port %s\n", readBuffer);
// Store this information in the connections database for
// later consumption
key.dptr = dst_sprintf(&key.dsize, "%s",
inet_ntoa(connaddr.sin_addr));
data.dptr = dst_sprintf(&data.dsize, "%d", atoi(readBuffer));
if (tdb_store(conndb, key, data, TDB_REPLACE) != 0)
dst_error(1, "Failed to log the connection properly");
// Done!
close(socketfd);
exit(0);
break;
case -1:
// An error
dst_error(1, "Fork error on new connection");
break;
default:
// We are the parent -- go listen for the next connection
break;
}
--
Michael Still ([EMAIL PROTECTED])
http://www.stillhq.com -- a whole bunch of Open Source stuff including PDF
software...
"Grrrrrrr! I'm a volleyballing machine!"
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