/*
* Interface between xdr serializer and tcp connection.
* Behaves like the system calls, read & write, but keeps some error state
* around for the rpc level.
*/
static int
read_vc(void *ctp, void *buf, int len)
{
struct sockaddr sa;
socklen_t sal;
struct ct_data *ct = (struct ct_data *)ctp;
struct pollfd fd;
int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) +
(ct->ct_wait.tv_usec / 1000));
if (len == 0)
return (0);
fd.fd = ct->ct_fd;
fd.events = POLLIN;
for (;;) {
switch (_poll(&fd, 1, milliseconds)) {
case 0:
ct->ct_error.re_status = RPC_TIMEDOUT;
return (-1);
case -1:
if (errno == EINTR)
continue;
ct->ct_error.re_status = RPC_CANTRECV;
ct->ct_error.re_errno = errno;
return (-1);
}
break;
}
sal = sizeof(sa);
if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) &&
(sa.sa_family == AF_LOCAL)) {
len = __msgread(ct->ct_fd, buf, (size_t)len);
} else {
len = _read(ct->ct_fd, buf, (size_t)len);
}
switch (len) {
case 0:
/* premature eof */
ct->ct_error.re_errno = ECONNRESET;
ct->ct_error.re_status = RPC_CANTRECV;
len = -1; /* it's really an error */
break;
case -1:
ct->ct_error.re_errno = errno;
ct->ct_error.re_status = RPC_CANTRECV;
break;
}
return (len);
}
/*
* Interface between xdr serializer and unix connection.
* Behaves like the system calls, read & write, but keeps some error state
* around for the rpc level.
*/
static int
readunix (char *ctptr, char *buf, int len)
{
struct ct_data *ct = (struct ct_data *) ctptr;
struct pollfd fd;
int milliseconds = ((ct->ct_wait.tv_sec * 1000)
+ (ct->ct_wait.tv_usec / 1000));
if (len == 0)
return 0;
fd.fd = ct->ct_sock;
fd.events = POLLIN;
while (TRUE)
{
switch (poll (&fd, 1, milliseconds))
{
case 0:
ct->ct_error.re_status = RPC_TIMEDOUT;
return -1;
case -1:
if (errno == EINTR)
continue;
ct->ct_error.re_status = RPC_CANTRECV;
ct->ct_error.re_errno = errno;
return -1;
}
break;
}
switch (len = __msgread (ct->ct_sock, buf, len))
{
case 0:
/* premature eof */
ct->ct_error.re_errno = ECONNRESET;
ct->ct_error.re_status = RPC_CANTRECV;
len = -1; /* it's really an error */
break;
case -1:
ct->ct_error.re_errno = errno;
ct->ct_error.re_status = RPC_CANTRECV;
break;
}
return len;
}
/*
* reads data from the unix connection.
* any error is fatal and the connection is closed.
* (And a read of zero bytes is a half closed stream => error.)
*/
static int
readunix (char *xprtptr, char *buf, int len)
{
SVCXPRT *xprt = (SVCXPRT *) xprtptr;
int sock = xprt->xp_sock;
int milliseconds = 35 * 1000;
struct pollfd pollfd;
do
{
pollfd.fd = sock;
pollfd.events = POLLIN;
switch (__poll (&pollfd, 1, milliseconds))
{
case -1:
if (errno == EINTR)
continue;
/*FALLTHROUGH*/
case 0:
goto fatal_err;
default:
if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
|| (pollfd.revents & POLLNVAL))
goto fatal_err;
break;
}
}
while ((pollfd.revents & POLLIN) == 0);
if ((len = __msgread (sock, buf, len)) > 0)
return len;
fatal_err:
((struct unix_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
return -1;
}
