/*
* Process initial NCP handshake (attach)
* NOTE: Since all functions below may change conn attributes, they
* should be called with LOCKED connection, also they use procp & ucred
*/
int
ncp_ncp_connect(struct ncp_conn *conn)
{
struct ncp_rq *rqp;
struct ncp_rphdr *rp;
int error;
error = ncp_rq_alloc_any(NCP_ALLOC_SLOT, 0, conn, conn->td, conn->ucred, &rqp);
if (error)
return error;
conn->flags &= ~(NCPFL_SIGNACTIVE | NCPFL_SIGNWANTED |
NCPFL_ATTACHED | NCPFL_LOGGED | NCPFL_INVALID);
conn->seq = 0;
error = ncp_request_int(rqp);
if (!error) {
rp = mtod(rqp->rp.md_top, struct ncp_rphdr*);
conn->connid = rp->conn_low + (rp->conn_high << 8);
}
int
ncp_request(struct ncp_rq *rqp)
{
struct ncp_conn *ncp = rqp->nr_conn;
int error, rcnt;
error = ncp_conn_lock(ncp, rqp->nr_td, rqp->nr_cred, NCPM_EXECUTE);
if (error)
goto out;
rcnt = NCP_RESTORE_COUNT;
for(;;) {
if (ncp->flags & NCPFL_ATTACHED) {
error = ncp_request_int(rqp);
if (ncp->flags & NCPFL_ATTACHED)
break;
}
if (rcnt-- == 0) {
error = ECONNRESET;
break;
}
/*
* Do not attempt to restore connection recursively
*/
if (ncp->flags & NCPFL_RESTORING) {
error = ENOTCONN;
break;
}
error = ncp_restore_login(ncp);
if (error)
continue;
}
ncp_conn_unlock(ncp, rqp->nr_td);
out:
if (error && (rqp->nr_flags & NCPR_DONTFREEONERR) == 0)
ncp_rq_done(rqp);
return error;
}
