1 files changed, 429 insertions, 0 deletions
diff --git a/REORG.TODO/sunrpc/svc_tcp.c b/REORG.TODO/sunrpc/svc_tcp.c
new file mode 100644
index 0000000000..fd9c1e83ca
--- /dev/null
+++ b/REORG.TODO/sunrpc/svc_tcp.c
@@ -0,0 +1,429 @@
+/*
+ * svc_tcp.c, Server side for TCP/IP based RPC.
+ *
+ * Copyright (C) 2012-2017 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (c) 2010, Oracle America, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *     * Neither the name of the "Oracle America, Inc." nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Actually implements two flavors of transporter -
+ * a tcp rendezvouser (a listener and connection establisher)
+ * and a record/tcp stream.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <libintl.h>
+#include <rpc/rpc.h>
+#include <sys/socket.h>
+#include <sys/poll.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <wchar.h>
+#include <libio/iolibio.h>
+#include <shlib-compat.h>
+
+/*
+ * Ops vector for TCP/IP based rpc service handle
+ */
+static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
+static enum xprt_stat svctcp_stat (SVCXPRT *);
+static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
+static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
+static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
+static void svctcp_destroy (SVCXPRT *);
+
+static const struct xp_ops svctcp_op =
+{
+  svctcp_recv,
+  svctcp_stat,
+  svctcp_getargs,
+  svctcp_reply,
+  svctcp_freeargs,
+  svctcp_destroy
+};
+
+/*
+ * Ops vector for TCP/IP rendezvous handler
+ */
+static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
+static enum xprt_stat rendezvous_stat (SVCXPRT *);
+static void svctcp_rendezvous_abort (void) __attribute__ ((__noreturn__));
+
+/* This function makes sure abort() relocation goes through PLT
+   and thus can be lazy bound.  */
+static void
+svctcp_rendezvous_abort (void)
+{
+  abort ();
+};
+
+static const struct xp_ops svctcp_rendezvous_op =
+{
+  rendezvous_request,
+  rendezvous_stat,
+  (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
+  (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort,
+  (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
+  svctcp_destroy
+};
+
+static int readtcp (char*, char *, int);
+static int writetcp (char *, char *, int);
+static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
+
+struct tcp_rendezvous
+  {				/* kept in xprt->xp_p1 */
+    u_int sendsize;
+    u_int recvsize;
+  };
+
+struct tcp_conn
+  {				/* kept in xprt->xp_p1 */
+    enum xprt_stat strm_stat;
+    u_long x_id;
+    XDR xdrs;
+    char verf_body[MAX_AUTH_BYTES];
+  };
+
+/*
+ * Usage:
+ *      xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
+ *
+ * Creates, registers, and returns a (rpc) tcp based transporter.
+ * Once *xprt is initialized, it is registered as a transporter
+ * see (svc.h, xprt_register).  This routine returns
+ * a NULL if a problem occurred.
+ *
+ * If sock<0 then a socket is created, else sock is used.
+ * If the socket, sock is not bound to a port then svctcp_create
+ * binds it to an arbitrary port.  The routine then starts a tcp
+ * listener on the socket's associated port.  In any (successful) case,
+ * xprt->xp_sock is the registered socket number and xprt->xp_port is the
+ * associated port number.
+ *
+ * Since tcp streams do buffered io similar to stdio, the caller can specify
+ * how big the send and receive buffers are via the second and third parms;
+ * 0 => use the system default.
+ */
+SVCXPRT *
+svctcp_create (int sock, u_int sendsize, u_int recvsize)
+{
+  bool_t madesock = FALSE;
+  SVCXPRT *xprt;
+  struct tcp_rendezvous *r;
+  struct sockaddr_in addr;
+  socklen_t len = sizeof (struct sockaddr_in);
+
+  if (sock == RPC_ANYSOCK)
+    {
+      if ((sock = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
+	{
+	  perror (_("svc_tcp.c - tcp socket creation problem"));
+	  return (SVCXPRT *) NULL;
+	}
+      madesock = TRUE;
+    }
+  __bzero ((char *) &addr, sizeof (addr));
+  addr.sin_family = AF_INET;
+  if (bindresvport (sock, &addr))
+    {
+      addr.sin_port = 0;
+      (void) __bind (sock, (struct sockaddr *) &addr, len);
+    }
+  if ((__getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
+      (__listen (sock, SOMAXCONN) != 0))
+    {
+      perror (_("svc_tcp.c - cannot getsockname or listen"));
+      if (madesock)
+	(void) __close (sock);
+      return (SVCXPRT *) NULL;
+    }
+  r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
+  xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
+  if (r == NULL || xprt == NULL)
+    {
+      (void) __fxprintf (NULL, "%s: %s", __func__, _("out of memory\n"));
+      mem_free (r, sizeof (*r));
+      mem_free (xprt, sizeof (SVCXPRT));
+      return NULL;
+    }
+  r->sendsize = sendsize;
+  r->recvsize = recvsize;
+  xprt->xp_p2 = NULL;
+  xprt->xp_p1 = (caddr_t) r;
+  xprt->xp_verf = _null_auth;
+  xprt->xp_ops = &svctcp_rendezvous_op;
+  xprt->xp_port = ntohs (addr.sin_port);
+  xprt->xp_sock = sock;
+  xprt_register (xprt);
+  return xprt;
+}
+#ifdef EXPORT_RPC_SYMBOLS
+libc_hidden_def (svctcp_create)
+#else
+libc_hidden_nolink_sunrpc (svctcp_create, GLIBC_2_0)
+#endif
+
+/*
+ * Like svtcp_create(), except the routine takes any *open* UNIX file
+ * descriptor as its first input.
+ */
+SVCXPRT *
+svcfd_create (int fd, u_int sendsize, u_int recvsize)
+{
+  return makefd_xprt (fd, sendsize, recvsize);
+}
+libc_hidden_nolink_sunrpc (svcfd_create, GLIBC_2_0)
+
+static SVCXPRT *
+internal_function
+makefd_xprt (int fd, u_int sendsize, u_int recvsize)
+{
+  SVCXPRT *xprt;
+  struct tcp_conn *cd;
+
+  xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
+  cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
+  if (xprt == (SVCXPRT *) NULL || cd == NULL)
+    {
+      (void) __fxprintf (NULL, "%s: %s", "svc_tcp: makefd_xprt",
+			 _("out of memory\n"));
+      mem_free (xprt, sizeof (SVCXPRT));
+      mem_free (cd, sizeof (struct tcp_conn));
+      return NULL;
+    }
+  cd->strm_stat = XPRT_IDLE;
+  xdrrec_create (&(cd->xdrs), sendsize, recvsize,
+		 (caddr_t) xprt, readtcp, writetcp);
+  xprt->xp_p2 = NULL;
+  xprt->xp_p1 = (caddr_t) cd;
+  xprt->xp_verf.oa_base = cd->verf_body;
+  xprt->xp_addrlen = 0;
+  xprt->xp_ops = &svctcp_op;	/* truly deals with calls */
+  xprt->xp_port = 0;		/* this is a connection, not a rendezvouser */
+  xprt->xp_sock = fd;
+  xprt_register (xprt);
+  return xprt;
+}
+
+static bool_t
+rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg)
+{
+  int sock;
+  struct tcp_rendezvous *r;
+  struct sockaddr_in addr;
+  socklen_t len;
+
+  r = (struct tcp_rendezvous *) xprt->xp_p1;
+again:
+  len = sizeof (struct sockaddr_in);
+  if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
+    {
+      if (errno == EINTR)
+	goto again;
+      __svc_accept_failed ();
+      return FALSE;
+    }
+  /*
+   * make a new transporter (re-uses xprt)
+   */
+  xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
+  memcpy (&xprt->xp_raddr, &addr, sizeof (addr));
+  xprt->xp_addrlen = len;
+  return FALSE;		/* there is never an rpc msg to be processed */
+}
+
+static enum xprt_stat
+rendezvous_stat (SVCXPRT *xprt)
+{
+  return XPRT_IDLE;
+}
+
+static void
+svctcp_destroy (SVCXPRT *xprt)
+{
+  struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
+
+  xprt_unregister (xprt);
+  (void) __close (xprt->xp_sock);
+  if (xprt->xp_port != 0)
+    {
+      /* a rendezvouser socket */
+      xprt->xp_port = 0;
+    }
+  else
+    {
+      /* an actual connection socket */
+      XDR_DESTROY (&(cd->xdrs));
+    }
+  mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
+  mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
+}
+
+
+/*
+ * reads data from the tcp connection.
+ * any error is fatal and the connection is closed.
+ * (And a read of zero bytes is a half closed stream => error.)
+ */
+static int
+readtcp (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 = __read (sock, buf, len)) > 0)
+    return len;
+
+ fatal_err:
+  ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
+  return -1;
+}
+
+/*
+ * writes data to the tcp connection.
+ * Any error is fatal and the connection is closed.
+ */
+static int
+writetcp (char *xprtptr, char * buf, int len)
+{
+  SVCXPRT *xprt = (SVCXPRT *)xprtptr;
+  int i, cnt;
+
+  for (cnt = len; cnt > 0; cnt -= i, buf += i)
+    {
+      if ((i = __write (xprt->xp_sock, buf, cnt)) < 0)
+	{
+	  ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
+	  return -1;
+	}
+    }
+  return len;
+}
+
+static enum xprt_stat
+svctcp_stat (SVCXPRT *xprt)
+{
+  struct tcp_conn *cd =
+  (struct tcp_conn *) (xprt->xp_p1);
+
+  if (cd->strm_stat == XPRT_DIED)
+    return XPRT_DIED;
+  if (!xdrrec_eof (&(cd->xdrs)))
+    return XPRT_MOREREQS;
+  return XPRT_IDLE;
+}
+
+static bool_t
+svctcp_recv (SVCXPRT *xprt, struct rpc_msg *msg)
+{
+  struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
+  XDR *xdrs = &(cd->xdrs);
+
+  xdrs->x_op = XDR_DECODE;
+  (void) xdrrec_skiprecord (xdrs);
+  if (xdr_callmsg (xdrs, msg))
+    {
+      cd->x_id = msg->rm_xid;
+      return TRUE;
+    }
+  cd->strm_stat = XPRT_DIED;	/* XXXX */
+  return FALSE;
+}
+
+static bool_t
+svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
+{
+  return ((*xdr_args) (&(((struct tcp_conn *)
+			  (xprt->xp_p1))->xdrs), args_ptr));
+}
+
+static bool_t
+svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
+{
+  XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
+
+  xdrs->x_op = XDR_FREE;
+  return ((*xdr_args) (xdrs, args_ptr));
+}
+
+static bool_t
+svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
+{
+  struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
+  XDR *xdrs = &(cd->xdrs);
+  bool_t stat;
+
+  xdrs->x_op = XDR_ENCODE;
+  msg->rm_xid = cd->x_id;
+  stat = xdr_replymsg (xdrs, msg);
+  (void) xdrrec_endofrecord (xdrs, TRUE);
+  return stat;
+}