static Npfcall*
np_default_version(Npconn *conn, u32 msize, Npstr *version)
{
int dotu;
char *ver;
Npfcall *rc;
if (msize > conn->srv->msize)
msize = conn->srv->msize;
dotu = 0;
if (np_strcmp(version, "9P2000.u")==0 && conn->srv->dotu) {
ver = "9P2000.u";
dotu = 1;
} else if (np_strncmp(version, "9P2000", 6) == 0)
ver = "9P2000";
else
ver = NULL;
if (msize < IOHDRSZ)
np_werror("msize too small", EIO);
else if (ver) {
np_conn_reset(conn, msize, dotu);
rc = np_create_rversion(msize, ver);
} else
np_werror("unsupported 9P version", EIO);
return rc;
}
static void
test_rversion (void)
{
Npfcall *fc, *fc2;
if (!(fc = np_create_rversion (TEST_MSIZE, "9p2000.L")))
msg_exit ("out of memory");
fc2 = _rcv_buf (fc, P9_RVERSION, __FUNCTION__);
assert (fc->u.rversion.msize == fc2->u.rversion.msize);
assert (np_str9cmp (&fc->u.rversion.version, &fc2->u.rversion.version) == 0);
free (fc);
free (fc2);
}
Npfcall *
np_version(Npreq *req, Npfcall *tc)
{
Npfcall *rc = NULL;
int msize = tc->u.tversion.msize;
if (msize < P9_IOHDRSZ + 1) {
np_uerror(EIO);
return NULL;
}
if (msize > req->conn->msize)
msize = req->conn->msize;
if (msize < req->conn->msize)
req->conn->msize = msize; /* conn->msize can only be reduced */
if (np_strcmp(&tc->u.tversion.version, "9P2000.L") == 0) {
if (!(rc = np_create_rversion(msize, "9P2000.L")))
np_uerror(ENOMEM);
} else
np_uerror(EIO);
return rc;
}