remove RPC implementation

The included RPC implementation is ipv4 only.
Other C library projects have either deprecated the internal
RPC implementation (GNU C Library) or never implemented such
functionality (musl C Library). The latest rpcbind release (0.2.4)
checks for libtirpc and does not allow to be build with uClibc-ng
RPC without patching. The common use case for RPC nowadays is to
use rpcbind together with nfs-utils to provide NFS server or client
support to a system.

The included RPC implementation does create issues with duplicate
symbol failures when statically compiling with RPC enabled.

1 files changed, 0 insertions, 517 deletions

diff --git a/libc/inet/rpc/svc_unix.c b/libc/inet/rpc/svc_unix.c
deleted file mode 100644
index 8cc982a59..000000000
--- a/libc/inet/rpc/svc_unix.c
+++ /dev/null
@@ -1,517 +0,0 @@
-/*
- * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
- * unrestricted use provided that this legend is included on all tape
- * media and as a part of the software program in whole or part.  Users
- * may copy or modify Sun RPC without charge, but are not authorized
- * to license or distribute it to anyone else except as part of a product or
- * program developed by the user.
- *
- * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
- * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
- * Sun RPC is provided with no support and without any obligation on the
- * part of Sun Microsystems, Inc. to assist in its use, correction,
- * modification or enhancement.
- *
- * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
- * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
- * OR ANY PART THEREOF.
- *
- * In no event will Sun Microsystems, Inc. be liable for any lost revenue
- * or profits or other special, indirect and consequential damages, even if
- * Sun has been advised of the possibility of such damages.
- *
- * Sun Microsystems, Inc.
- * 2550 Garcia Avenue
- * Mountain View, California  94043
- */
-
-/*
- * svc_unix.c, Server side for TCP/IP based RPC.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * Actually implements two flavors of transporter -
- * a unix rendezvouser (a listener and connection establisher)
- * and a record/unix stream.
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include "rpc_private.h"
-#include <rpc/svc.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <sys/poll.h>
-#include <errno.h>
-#include <stdlib.h>
-
-/*
- * Ops vector for AF_UNIX based rpc service handle
- */
-static bool_t svcunix_recv (SVCXPRT *, struct rpc_msg *);
-static enum xprt_stat svcunix_stat (SVCXPRT *);
-static bool_t svcunix_getargs (SVCXPRT *, xdrproc_t, caddr_t);
-static bool_t svcunix_reply (SVCXPRT *, struct rpc_msg *);
-static bool_t svcunix_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
-static void svcunix_destroy (SVCXPRT *);
-
-static const struct xp_ops svcunix_op =
-{
-  svcunix_recv,
-  svcunix_stat,
-  svcunix_getargs,
-  svcunix_reply,
-  svcunix_freeargs,
-  svcunix_destroy
-};
-
-/*
- * Ops vector for AF_UNIX rendezvous handler
- */
-static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
-static enum xprt_stat rendezvous_stat (SVCXPRT *);
-static void svcunix_rendezvous_abort (void) attribute_noreturn;
-
-/* This function makes sure abort() relocation goes through PLT
-   and thus can be lazy bound.  */
-static void
-svcunix_rendezvous_abort (void)
-{
-  abort ();
-};
-
-static const struct xp_ops svcunix_rendezvous_op =
-{
-  rendezvous_request,
-  rendezvous_stat,
-  (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svcunix_rendezvous_abort,
-  (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svcunix_rendezvous_abort,
-  (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svcunix_rendezvous_abort,
-  svcunix_destroy
-};
-
-static int readunix (char*, char *, int);
-static int writeunix (char *, char *, int);
-static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
-
-struct unix_rendezvous {        /* kept in xprt->xp_p1 */
-  u_int sendsize;
-  u_int recvsize;
-};
-
-struct unix_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 = svcunix_create(sock, send_buf_size, recv_buf_size);
- *
- * Creates, registers, and returns a (rpc) unix 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 svcunix_create
- * binds it to an arbitrary port.  The routine then starts a unix
- * 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 unix 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 *
-svcunix_create (int sock, u_int sendsize, u_int recvsize, char *path)
-{
-  bool_t madesock = FALSE;
-  SVCXPRT *xprt;
-  struct unix_rendezvous *r;
-  struct sockaddr_un addr;
-  socklen_t len = sizeof (struct sockaddr_in);
-
-  if (sock == RPC_ANYSOCK)
-    {
-      if ((sock = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
-	{
-	  perror ("svc_unix.c - AF_UNIX socket creation problem");
-	  return (SVCXPRT *) NULL;
-	}
-      madesock = TRUE;
-    }
-  memset (&addr, '\0', sizeof (addr));
-  addr.sun_family = AF_UNIX;
-  len = strlen (path) + 1;
-  memcpy (addr.sun_path, path, len);
-  len += sizeof (addr.sun_family);
-
-  bind (sock, (struct sockaddr *) &addr, len);
-
-  if (getsockname (sock, (struct sockaddr *) &addr, &len) != 0
-      || listen (sock, 2) != 0)
-    {
-      perror ("svc_unix.c - cannot getsockname or listen");
-      if (madesock)
-	close (sock);
-      return (SVCXPRT *) NULL;
-    }
-
-  r = (struct unix_rendezvous *) mem_alloc (sizeof (*r));
-  xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
-  if (r == NULL || xprt == NULL)
-    {
-      fputs ("svcunix_create: out of memory\n", stderr);
-      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 = &svcunix_rendezvous_op;
-  xprt->xp_port = -1;
-  xprt->xp_sock = sock;
-  xprt_register (xprt);
-  return xprt;
-}
-
-/*
- * Like svunix_create(), except the routine takes any *open* UNIX file
- * descriptor as its first input.
- */
-SVCXPRT *
-svcunixfd_create (int fd, u_int sendsize, u_int recvsize);
-SVCXPRT *
-svcunixfd_create (int fd, u_int sendsize, u_int recvsize)
-{
-  return makefd_xprt (fd, sendsize, recvsize);
-}
-
-static SVCXPRT *
-internal_function
-makefd_xprt (int fd, u_int sendsize, u_int recvsize)
-{
-  SVCXPRT *xprt;
-  struct unix_conn *cd;
-
-  xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
-  cd = (struct unix_conn *) mem_alloc (sizeof (struct unix_conn));
-  if (xprt == (SVCXPRT *) NULL || cd == (struct unix_conn *) NULL)
-    {
-      (void) fputs ("svc_unix: makefd_xprt: out of memory\n", stderr);
-      mem_free (xprt, sizeof (SVCXPRT));
-      mem_free (cd, sizeof (struct unix_conn));
-      return NULL;
-    }
-  cd->strm_stat = XPRT_IDLE;
-  xdrrec_create (&(cd->xdrs), sendsize, recvsize,
-		 (caddr_t) xprt, readunix, writeunix);
-  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 = &svcunix_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 attribute_unused)
-{
-  int sock;
-  struct unix_rendezvous *r;
-  struct sockaddr_un addr;
-  struct sockaddr_in in_addr;
-  socklen_t len;
-
-  r = (struct unix_rendezvous *) xprt->xp_p1;
-again:
-  len = sizeof (struct sockaddr_un);
-  if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
-    {
-      if (errno == EINTR)
-	goto again;
-      return FALSE;
-    }
-  /*
-   * make a new transporter (re-uses xprt)
-   */
-  memset (&in_addr, '\0', sizeof (in_addr));
-  in_addr.sin_family = AF_UNIX;
-  xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
-  memcpy (&xprt->xp_raddr, &in_addr, sizeof (in_addr));
-  xprt->xp_addrlen = len;
-  return FALSE;		/* there is never an rpc msg to be processed */
-}
-
-static enum xprt_stat
-rendezvous_stat (SVCXPRT *xprt attribute_unused)
-{
-  return XPRT_IDLE;
-}
-
-static void
-svcunix_destroy (SVCXPRT *xprt)
-{
-  struct unix_conn *cd = (struct unix_conn *) xprt->xp_p1;
-
-  xprt_unregister (xprt);
-  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 unix_conn));
-  mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
-}
-
-#ifdef SCM_CREDENTIALS
-struct cmessage {
-  struct cmsghdr cmsg;
-  struct ucred cmcred;
-  /* hack to make sure we have enough memory */
-  char dummy[(CMSG_ALIGN (sizeof (struct ucred)) - sizeof (struct ucred) + sizeof (long))];
-};
-
-/* XXX This is not thread safe, but since the main functions in svc.c
-   and the rpcgen generated *_svc functions for the daemon are also not
-   thread safe and uses static global variables, it doesn't matter. */
-static struct cmessage cm;
-#endif
-
-static int
-__msgread (int sock, void *data, size_t cnt)
-{
-  struct iovec iov;
-  struct msghdr msg;
-  int len;
-
-  iov.iov_base = data;
-  iov.iov_len = cnt;
-
-  msg.msg_iov = &iov;
-  msg.msg_iovlen = 1;
-  msg.msg_name = NULL;
-  msg.msg_namelen = 0;
-#ifdef SCM_CREDENTIALS
-  msg.msg_control = (caddr_t) &cm;
-  msg.msg_controllen = sizeof (struct cmessage);
-#endif
-  msg.msg_flags = 0;
-
-#ifdef SO_PASSCRED
-  {
-    int on = 1;
-    if (setsockopt (sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof (on)))
-      return -1;
-  }
-#endif
-
- restart:
-  len = recvmsg (sock, &msg, 0);
-  if (len >= 0)
-    {
-      if (msg.msg_flags & MSG_CTRUNC || len == 0)
-        return 0;
-      else
-        return len;
-    }
-  if (errno == EINTR)
-    goto restart;
-  return -1;
-}
-
-static int
-__msgwrite (int sock, void *data, size_t cnt)
-{
-#ifndef SCM_CREDENTIALS
-  /* We cannot implement this reliably.  */
-  __set_errno (ENOSYS);
-  return -1;
-#else
-  struct iovec iov;
-  struct msghdr msg;
-  struct cmsghdr *cmsg = &cm.cmsg;
-  struct ucred cred;
-  int len;
-
-  /* XXX I'm not sure, if gete?id() is always correct, or if we should use
-     get?id(). But since keyserv needs geteuid(), we have no other chance.
-     It would be much better, if the kernel could pass both to the server. */
-  cred.pid = getpid ();
-  cred.uid = geteuid ();
-  cred.gid = getegid ();
-
-  memcpy (CMSG_DATA(cmsg), &cred, sizeof (struct ucred));
-  cmsg->cmsg_level = SOL_SOCKET;
-  cmsg->cmsg_type = SCM_CREDENTIALS;
-  cmsg->cmsg_len = sizeof(*cmsg) + sizeof(struct ucred);
-
-  iov.iov_base = data;
-  iov.iov_len = cnt;
-
-  msg.msg_iov = &iov;
-  msg.msg_iovlen = 1;
-  msg.msg_name = NULL;
-  msg.msg_namelen = 0;
-  msg.msg_control = cmsg;
-  msg.msg_controllen = CMSG_ALIGN(cmsg->cmsg_len);
-  msg.msg_flags = 0;
-
- restart:
-  len = sendmsg (sock, &msg, 0);
-  if (len >= 0)
-    return len;
-  if (errno == EINTR)
-    goto restart;
-  return -1;
-
-#endif
-}
-
-/*
- * 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;
-}
-
-/*
- * writes data to the unix connection.
- * Any error is fatal and the connection is closed.
- */
-static int
-writeunix (char *xprtptr, char * buf, int len)
-{
-  SVCXPRT *xprt = (SVCXPRT *) xprtptr;
-  int i, cnt;
-
-  for (cnt = len; cnt > 0; cnt -= i, buf += i)
-    {
-      if ((i = __msgwrite (xprt->xp_sock, buf, cnt)) < 0)
-	{
-	  ((struct unix_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
-	  return -1;
-	}
-    }
-  return len;
-}
-
-static enum xprt_stat
-svcunix_stat (SVCXPRT *xprt)
-{
-  struct unix_conn *cd =
-  (struct unix_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
-svcunix_recv (SVCXPRT *xprt, struct rpc_msg *msg)
-{
-  struct unix_conn *cd = (struct unix_conn *) (xprt->xp_p1);
-  XDR *xdrs = &(cd->xdrs);
-
-  xdrs->x_op = XDR_DECODE;
-  xdrrec_skiprecord (xdrs);
-  if (xdr_callmsg (xdrs, msg))
-    {
-      cd->x_id = msg->rm_xid;
-      /* set up verifiers */
-#ifdef SCM_CREDENTIALS
-      msg->rm_call.cb_verf.oa_flavor = AUTH_UNIX;
-      msg->rm_call.cb_verf.oa_base = (caddr_t) &cm;
-      msg->rm_call.cb_verf.oa_length = sizeof (cm);
-#endif
-      return TRUE;
-    }
-  cd->strm_stat = XPRT_DIED;	/* XXXX */
-  return FALSE;
-}
-
-static bool_t
-svcunix_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
-  return (*xdr_args) (&(((struct unix_conn *) (xprt->xp_p1))->xdrs),
-		      args_ptr);
-}
-
-static bool_t
-svcunix_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
-  XDR *xdrs = &(((struct unix_conn *) (xprt->xp_p1))->xdrs);
-
-  xdrs->x_op = XDR_FREE;
-  return (*xdr_args) (xdrs, args_ptr);
-}
-
-static bool_t
-svcunix_reply (SVCXPRT *xprt, struct rpc_msg *msg)
-{
-  struct unix_conn *cd = (struct unix_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;
-}