int
rtime (struct sockaddr_in *addrp, struct rpc_timeval *timep,
struct rpc_timeval *timeout)
{
int s;
struct pollfd fd;
int milliseconds;
int res;
/* RFC 868 says the time is transmitted as a 32-bit value. */
uint32_t thetime;
struct sockaddr_in from;
int fromlen;
int type;
if (timeout == NULL)
type = SOCK_STREAM;
else
type = SOCK_DGRAM;
s = __socket (AF_INET, type, 0);
if (s < 0)
return (-1);
addrp->sin_family = AF_INET;
addrp->sin_port = htons (IPPORT_TIMESERVER);
if (type == SOCK_DGRAM)
{
res = __sendto (s, (char *) &thetime, sizeof (thetime), 0,
(struct sockaddr *) addrp, sizeof (*addrp));
if (res < 0)
{
do_close (s);
return -1;
}
milliseconds = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
fd.fd = s;
fd.events = POLLIN;
do
res = __poll (&fd, 1, milliseconds);
while (res < 0 && errno == EINTR);
if (res <= 0)
{
if (res == 0)
__set_errno (ETIMEDOUT);
do_close (s);
return (-1);
}
fromlen = sizeof (from);
res = __recvfrom (s, (char *) &thetime, sizeof (thetime), 0,
(struct sockaddr *) &from, &fromlen);
do_close (s);
if (res < 0)
return -1;
}
else
{
if (__connect (s, (struct sockaddr *) addrp, sizeof (*addrp)) < 0)
{
do_close (s);
return -1;
}
res = __read (s, (char *) &thetime, sizeof (thetime));
do_close (s);
if (res < 0)
return (-1);
}
if (res != sizeof (thetime))
{
__set_errno (EIO);
return -1;
}
thetime = ntohl (thetime);
timep->tv_sec = thetime - TOFFSET;
timep->tv_usec = 0;
return 0;
}
static enum clnt_stat
clntudp_call (/* client handle */
CLIENT *cl,
/* procedure number */
u_long proc,
/* xdr routine for args */
xdrproc_t xargs,
/* pointer to args */
caddr_t argsp,
/* xdr routine for results */
xdrproc_t xresults,
/* pointer to results */
caddr_t resultsp,
/* seconds to wait before giving up */
struct timeval utimeout)
{
struct cu_data *cu = (struct cu_data *) cl->cl_private;
XDR *xdrs;
int outlen = 0;
int inlen;
socklen_t fromlen;
struct pollfd fd;
int milliseconds = (cu->cu_wait.tv_sec * 1000) +
(cu->cu_wait.tv_usec / 1000);
struct sockaddr_in from;
struct rpc_msg reply_msg;
XDR reply_xdrs;
struct timeval time_waited;
bool_t ok;
int nrefreshes = 2; /* number of times to refresh cred */
struct timeval timeout;
int anyup; /* any network interface up */
if (cu->cu_total.tv_usec == -1)
{
timeout = utimeout; /* use supplied timeout */
}
else
{
timeout = cu->cu_total; /* use default timeout */
}
time_waited.tv_sec = 0;
time_waited.tv_usec = 0;
call_again:
xdrs = &(cu->cu_outxdrs);
if (xargs == NULL)
goto get_reply;
xdrs->x_op = XDR_ENCODE;
XDR_SETPOS (xdrs, cu->cu_xdrpos);
/*
* the transaction is the first thing in the out buffer
*/
(*(uint32_t *) (cu->cu_outbuf))++;
if ((!XDR_PUTLONG (xdrs, (long *) &proc)) ||
(!AUTH_MARSHALL (cl->cl_auth, xdrs)) ||
(!(*xargs) (xdrs, argsp)))
return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
outlen = (int) XDR_GETPOS (xdrs);
send_again:
if (__sendto (cu->cu_sock, cu->cu_outbuf, outlen, 0,
(struct sockaddr *) &(cu->cu_raddr), cu->cu_rlen)
!= outlen)
{
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTSEND);
}
/*
* Hack to provide rpc-based message passing
*/
if (timeout.tv_sec == 0 && timeout.tv_usec == 0)
{
return (cu->cu_error.re_status = RPC_TIMEDOUT);
}
get_reply:
/*
* sub-optimal code appears here because we have
* some clock time to spare while the packets are in flight.
* (We assume that this is actually only executed once.)
*/
reply_msg.acpted_rply.ar_verf = _null_auth;
reply_msg.acpted_rply.ar_results.where = resultsp;
reply_msg.acpted_rply.ar_results.proc = xresults;
fd.fd = cu->cu_sock;
fd.events = POLLIN;
anyup = 0;
for (;;)
{
switch (__poll (&fd, 1, milliseconds))
{
case 0:
if (anyup == 0)
{
anyup = is_network_up (cu->cu_sock);
if (!anyup)
return (cu->cu_error.re_status = RPC_CANTRECV);
}
time_waited.tv_sec += cu->cu_wait.tv_sec;
time_waited.tv_usec += cu->cu_wait.tv_usec;
while (time_waited.tv_usec >= 1000000)
{
time_waited.tv_sec++;
time_waited.tv_usec -= 1000000;
}
if ((time_waited.tv_sec < timeout.tv_sec) ||
((time_waited.tv_sec == timeout.tv_sec) &&
(time_waited.tv_usec < timeout.tv_usec)))
goto send_again;
return (cu->cu_error.re_status = RPC_TIMEDOUT);
/*
* buggy in other cases because time_waited is not being
* updated.
*/
case -1:
if (errno == EINTR)
continue;
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
#ifdef IP_RECVERR
if (fd.revents & POLLERR)
{
struct msghdr msg;
struct cmsghdr *cmsg;
struct sock_extended_err *e;
struct sockaddr_in err_addr;
struct iovec iov;
char *cbuf = malloc (outlen + 256);
int ret;
if (cbuf == NULL)
{
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
iov.iov_base = cbuf + 256;
iov.iov_len = outlen;
msg.msg_name = (void *) &err_addr;
msg.msg_namelen = sizeof (err_addr);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
msg.msg_control = cbuf;
msg.msg_controllen = 256;
ret = __recvmsg (cu->cu_sock, &msg, MSG_ERRQUEUE);
if (ret >= 0
&& memcmp (cbuf + 256, cu->cu_outbuf, ret) == 0
&& (msg.msg_flags & MSG_ERRQUEUE)
&& ((msg.msg_namelen == 0
&& ret >= 12)
|| (msg.msg_namelen == sizeof (err_addr)
&& err_addr.sin_family == AF_INET
&& memcmp (&err_addr.sin_addr, &cu->cu_raddr.sin_addr,
sizeof (err_addr.sin_addr)) == 0
&& err_addr.sin_port == cu->cu_raddr.sin_port)))
for (cmsg = CMSG_FIRSTHDR (&msg); cmsg;
cmsg = CMSG_NXTHDR (&msg, cmsg))
if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR)
{
free (cbuf);
e = (struct sock_extended_err *) CMSG_DATA(cmsg);
cu->cu_error.re_errno = e->ee_errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
free (cbuf);
}
#endif
do
{
fromlen = sizeof (struct sockaddr);
inlen = __recvfrom (cu->cu_sock, cu->cu_inbuf,
(int) cu->cu_recvsz, MSG_DONTWAIT,
(struct sockaddr *) &from, &fromlen);
}
while (inlen < 0 && errno == EINTR);
if (inlen < 0)
{
if (errno == EWOULDBLOCK)
continue;
cu->cu_error.re_errno = errno;
return (cu->cu_error.re_status = RPC_CANTRECV);
}
if (inlen < 4)
continue;
/* see if reply transaction id matches sent id.
Don't do this if we only wait for a replay */
if (xargs != NULL
&& memcmp (cu->cu_inbuf, cu->cu_outbuf, sizeof (u_int32_t)) != 0)
continue;
/* we now assume we have the proper reply */
break;
}
/*
* now decode and validate the response
*/
xdrmem_create (&reply_xdrs, cu->cu_inbuf, (u_int) inlen, XDR_DECODE);
ok = xdr_replymsg (&reply_xdrs, &reply_msg);
/* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */
if (ok)
{
_seterr_reply (&reply_msg, &(cu->cu_error));
if (cu->cu_error.re_status == RPC_SUCCESS)
{
if (!AUTH_VALIDATE (cl->cl_auth,
&reply_msg.acpted_rply.ar_verf))
{
cu->cu_error.re_status = RPC_AUTHERROR;
cu->cu_error.re_why = AUTH_INVALIDRESP;
}
if (reply_msg.acpted_rply.ar_verf.oa_base != NULL)
{
xdrs->x_op = XDR_FREE;
(void) xdr_opaque_auth (xdrs, &(reply_msg.acpted_rply.ar_verf));
}
} /* end successful completion */
else
{
/* maybe our credentials need to be refreshed ... */
if (nrefreshes > 0 && AUTH_REFRESH (cl->cl_auth))
{
nrefreshes--;
goto call_again;
}
} /* end of unsuccessful completion */
} /* end of valid reply message */
else
{
cu->cu_error.re_status = RPC_CANTDECODERES;
}
return cu->cu_error.re_status;
}
