SVCXPRT *
svc_dg_ncreatef(const int fd, const u_int sendsz, const u_int recvsz,
const uint32_t flags)
{
SVCXPRT *xprt;
struct rpc_dplx_rec *rec;
struct svc_dg_xprt *su;
struct __rpc_sockinfo si;
u_int recvsize;
u_int sendsize;
u_int xp_flags;
int rc;
/* atomically find or create shared fd state; ref+1; locked */
xprt = svc_xprt_lookup(fd, svc_dg_xprt_setup);
if (!xprt) {
__warnx(TIRPC_DEBUG_FLAG_ERROR,
"%s: fd %d svc_xprt_lookup failed",
__func__, fd);
return (NULL);
}
rec = REC_XPRT(xprt);
xp_flags = atomic_postset_uint16_t_bits(&xprt->xp_flags, flags
| SVC_XPRT_FLAG_INITIALIZED);
if ((xp_flags & SVC_XPRT_FLAG_INITIALIZED)) {
rpc_dplx_rui(rec);
XPRT_TRACE(xprt, __func__, __func__, __LINE__);
return (xprt);
}
if (!__rpc_fd2sockinfo(fd, &si)) {
atomic_clear_uint16_t_bits(&xprt->xp_flags,
SVC_XPRT_FLAG_INITIALIZED);
rpc_dplx_rui(rec);
__warnx(TIRPC_DEBUG_FLAG_ERROR,
"%s: fd %d could not get transport information",
__func__, fd);
return (NULL);
}
/*
* Find the receive and the send size
*/
sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz);
recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz);
if ((sendsize == 0) || (recvsize == 0)) {
atomic_clear_uint16_t_bits(&xprt->xp_flags,
SVC_XPRT_FLAG_INITIALIZED);
rpc_dplx_rui(rec);
__warnx(TIRPC_DEBUG_FLAG_ERROR,
"%s: fd %d transport does not support data transfer",
__func__, fd);
return (NULL);
}
__rpc_address_setup(&xprt->xp_local);
rc = getsockname(fd, xprt->xp_local.nb.buf, &xprt->xp_local.nb.len);
if (rc < 0) {
atomic_clear_uint16_t_bits(&xprt->xp_flags,
SVC_XPRT_FLAG_INITIALIZED);
rpc_dplx_rui(rec);
__warnx(TIRPC_DEBUG_FLAG_ERROR,
"%s: fd %d getsockname failed (%d)",
__func__, fd, rc);
return (NULL);
}
/*
* Should be multiple of 4 for XDR.
*/
su = DG_DR(rec);
su->su_dr.sendsz = ((sendsize + 3) / 4) * 4;
su->su_dr.recvsz = ((recvsize + 3) / 4) * 4;
su->su_dr.maxrec = ((MAX(sendsize, recvsize) + 3) / 4) * 4;
/* duplex streams are not used by the rendezvous transport */
xdrmem_create(su->su_dr.ioq.xdrs, NULL, 0, XDR_ENCODE);
svc_dg_rendezvous_ops(xprt);
/* Enable reception of IP*_PKTINFO control msgs */
svc_dg_enable_pktinfo(fd, &si);
/* Conditional register */
if ((!(__svc_params->flags & SVC_FLAG_NOREG_XPRTS)
&& !(flags & SVC_CREATE_FLAG_XPRT_NOREG))
|| (flags & SVC_CREATE_FLAG_XPRT_DOREG))
svc_rqst_evchan_reg(__svc_params->ev_u.evchan.id, xprt,
SVC_RQST_FLAG_LOCKED |
SVC_RQST_FLAG_CHAN_AFFINITY);
/* release */
rpc_dplx_rui(rec);
XPRT_TRACE(xprt, __func__, __func__, __LINE__);
#if defined(HAVE_BLKIN)
__rpc_set_blkin_endpoint(xprt, "svc_dg");
#endif
return (xprt);
}
uint16_t x2__atomic_clear_uint16_t_bits(uint16_t *p, uint16_t v)
{
return atomic_clear_uint16_t_bits(p, v);
}