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, 628 deletions

diff --git a/libc/inet/rpc/xdr_rec.c b/libc/inet/rpc/xdr_rec.c
deleted file mode 100644
index c17bfa12b..000000000
--- a/libc/inet/rpc/xdr_rec.c
+++ /dev/null
@@ -1,628 +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
- */
-
-/*
- * xdr_rec.c, Implements TCP/IP based XDR streams with a "record marking"
- * layer above tcp (for rpc's use).
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * These routines interface XDRSTREAMS to a tcp/ip connection.
- * There is a record marking layer between the xdr stream
- * and the tcp transport level.  A record is composed on one or more
- * record fragments.  A record fragment is a thirty-two bit header followed
- * by n bytes of data, where n is contained in the header.  The header
- * is represented as a htonl(u_long).  The high order bit encodes
- * whether or not the fragment is the last fragment of the record
- * (1 => fragment is last, 0 => more fragments to follow.
- * The other 31 bits encode the byte length of the fragment.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include "rpc_private.h"
-
-static bool_t xdrrec_getbytes (XDR *, caddr_t, u_int);
-static bool_t xdrrec_putbytes (XDR *, const char *, u_int);
-static bool_t xdrrec_getint32 (XDR *, int32_t *);
-static bool_t xdrrec_putint32 (XDR *, const int32_t *);
-#if ULONG_MAX != 0xffffffff
-static bool_t xdrrec_getlong (XDR *, long *);
-static bool_t xdrrec_putlong (XDR *, const long *);
-#endif
-static u_int xdrrec_getpos (const XDR *);
-static bool_t xdrrec_setpos (XDR *, u_int);
-static int32_t *xdrrec_inline (XDR *, u_int);
-static void xdrrec_destroy (XDR *);
-
-static const struct xdr_ops xdrrec_ops = {
-#if ULONG_MAX == 0xffffffff
-  (bool_t (*)(XDR *, long *)) xdrrec_getint32,
-  (bool_t (*)(XDR *, const long *)) xdrrec_putint32,
-#else
-  xdrrec_getlong,
-  xdrrec_putlong,
-#endif
-  xdrrec_getbytes,
-  xdrrec_putbytes,
-  xdrrec_getpos,
-  xdrrec_setpos,
-  xdrrec_inline,
-  xdrrec_destroy,
-  xdrrec_getint32,
-  xdrrec_putint32
-};
-
-/*
- * A record is composed of one or more record fragments.
- * A record fragment is a two-byte header followed by zero to
- * 2**32-1 bytes.  The header is treated as a long unsigned and is
- * encode/decoded to the network via htonl/ntohl.  The low order 31 bits
- * are a byte count of the fragment.  The highest order bit is a boolean:
- * 1 => this fragment is the last fragment of the record,
- * 0 => this fragment is followed by more fragment(s).
- *
- * The fragment/record machinery is not general;  it is constructed to
- * meet the needs of xdr and rpc based on tcp.
- */
-
-#define LAST_FRAG (1UL << 31)
-
-typedef struct rec_strm
-  {
-    caddr_t tcp_handle;
-    caddr_t the_buffer;
-    /*
-     * out-going bits
-     */
-    int (*writeit) (char *, char *, int);
-    caddr_t out_base;		/* output buffer (points to frag header) */
-    caddr_t out_finger;		/* next output position */
-    caddr_t out_boundry;	/* data cannot up to this address */
-    u_int32_t *frag_header;	/* beginning of curren fragment */
-    bool_t frag_sent;		/* true if buffer sent in middle of record */
-    /*
-     * in-coming bits
-     */
-    int (*readit) (char *, char *, int);
-    u_long in_size;		/* fixed size of the input buffer */
-    caddr_t in_base;
-    caddr_t in_finger;		/* location of next byte to be had */
-    caddr_t in_boundry;		/* can read up to this location */
-    long fbtbc;			/* fragment bytes to be consumed */
-    bool_t last_frag;
-    u_int sendsize;
-    u_int recvsize;
-  }
-RECSTREAM;
-
-static u_int fix_buf_size (u_int) internal_function;
-static bool_t skip_input_bytes (RECSTREAM *, long) internal_function;
-static bool_t flush_out (RECSTREAM *, bool_t) internal_function;
-static bool_t set_input_fragment (RECSTREAM *) internal_function;
-static bool_t get_input_bytes (RECSTREAM *, caddr_t, int) internal_function;
-
-/*
- * Create an xdr handle for xdrrec
- * xdrrec_create fills in xdrs.  Sendsize and recvsize are
- * send and recv buffer sizes (0 => use default).
- * tcp_handle is an opaque handle that is passed as the first parameter to
- * the procedures readit and writeit.  Readit and writeit are read and
- * write respectively.   They are like the system
- * calls expect that they take an opaque handle rather than an fd.
- */
-void
-xdrrec_create (XDR *xdrs, u_int sendsize,
-	       u_int recvsize, caddr_t tcp_handle,
-	       int (*readit) (char *, char *, int),
-	       int (*writeit) (char *, char *, int))
-{
-  RECSTREAM *rstrm = (RECSTREAM *) mem_alloc (sizeof (RECSTREAM));
-  caddr_t tmp;
-  char *buf;
-
-  sendsize = fix_buf_size (sendsize);
-  recvsize = fix_buf_size (recvsize);
-  buf = mem_alloc (sendsize + recvsize + BYTES_PER_XDR_UNIT);
-
-  if (rstrm == NULL || buf == NULL)
-    {
-      (void) fputs ("xdrrec_create: out of memory\n", stderr);
-      mem_free (rstrm, sizeof (RECSTREAM));
-      mem_free (buf, sendsize + recvsize + BYTES_PER_XDR_UNIT);
-      /*
-       *  This is bad.  Should rework xdrrec_create to
-       *  return a handle, and in this case return NULL
-       */
-      return;
-    }
-  /*
-   * adjust sizes and allocate buffer quad byte aligned
-   */
-  rstrm->sendsize = sendsize;
-  rstrm->recvsize = recvsize;
-  rstrm->the_buffer = buf;
-  tmp = rstrm->the_buffer;
-  if ((size_t)tmp % BYTES_PER_XDR_UNIT)
-    tmp += BYTES_PER_XDR_UNIT - (size_t)tmp % BYTES_PER_XDR_UNIT;
-  rstrm->out_base = tmp;
-  rstrm->in_base = tmp + sendsize;
-  /*
-   * now the rest ...
-   */
-  xdrs->x_ops = &xdrrec_ops;
-  xdrs->x_private = (caddr_t) rstrm;
-  rstrm->tcp_handle = tcp_handle;
-  rstrm->readit = readit;
-  rstrm->writeit = writeit;
-  rstrm->out_finger = rstrm->out_boundry = rstrm->out_base;
-  rstrm->frag_header = (u_int32_t *) rstrm->out_base;
-  rstrm->out_finger += 4;
-  rstrm->out_boundry += sendsize;
-  rstrm->frag_sent = FALSE;
-  rstrm->in_size = recvsize;
-  rstrm->in_boundry = rstrm->in_base;
-  rstrm->in_finger = (rstrm->in_boundry += recvsize);
-  rstrm->fbtbc = 0;
-  rstrm->last_frag = TRUE;
-}
-libc_hidden_def(xdrrec_create)
-
-
-/*
- * The routines defined below are the xdr ops which will go into the
- * xdr handle filled in by xdrrec_create.
- */
-
-static bool_t
-xdrrec_getint32 (XDR *xdrs, int32_t *ip)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  int32_t *bufip = (int32_t *) rstrm->in_finger;
-  int32_t mylong;
-
-  /* first try the inline, fast case */
-  if (rstrm->fbtbc >= BYTES_PER_XDR_UNIT &&
-      rstrm->in_boundry - (char *) bufip >= BYTES_PER_XDR_UNIT)
-    {
-      *ip = ntohl (*bufip);
-      rstrm->fbtbc -= BYTES_PER_XDR_UNIT;
-      rstrm->in_finger += BYTES_PER_XDR_UNIT;
-    }
-  else
-    {
-      if (!xdrrec_getbytes (xdrs, (caddr_t) &mylong,
-			    BYTES_PER_XDR_UNIT))
-	return FALSE;
-      *ip = ntohl (mylong);
-    }
-  return TRUE;
-}
-
-#if ULONG_MAX != 0xffffffff
-static bool_t
-xdrrec_getlong (XDR *xdrs, long *lp)
-{
-  int32_t v;
-  bool_t r = xdrrec_getint32 (xdrs, &v);
-  *lp = v;
-  return r;
-}
-#endif
-
-static bool_t
-xdrrec_putint32 (XDR *xdrs, const int32_t *ip)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  int32_t *dest_ip = (int32_t *) rstrm->out_finger;
-
-  if ((rstrm->out_finger += BYTES_PER_XDR_UNIT) > rstrm->out_boundry)
-    {
-      /*
-       * this case should almost never happen so the code is
-       * inefficient
-       */
-      rstrm->out_finger -= BYTES_PER_XDR_UNIT;
-      rstrm->frag_sent = TRUE;
-      if (!flush_out (rstrm, FALSE))
-	return FALSE;
-      dest_ip = (int32_t *) rstrm->out_finger;
-      rstrm->out_finger += BYTES_PER_XDR_UNIT;
-    }
-  *dest_ip = htonl (*ip);
-  return TRUE;
-}
-
-#if ULONG_MAX != 0xffffffff
-static bool_t
-xdrrec_putlong (XDR *xdrs, const long *lp)
-{
-  int32_t v = *lp;
-  return xdrrec_putint32 (xdrs, &v);
-}
-#endif
-
-static bool_t	   /* must manage buffers, fragments, and records */
-xdrrec_getbytes (XDR *xdrs, caddr_t addr, u_int len)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  u_int current;
-
-  while (len > 0)
-    {
-      current = rstrm->fbtbc;
-      if (current == 0)
-	{
-	  if (rstrm->last_frag)
-	    return FALSE;
-	  if (!set_input_fragment (rstrm))
-	    return FALSE;
-	  continue;
-	}
-      current = (len < current) ? len : current;
-      if (!get_input_bytes (rstrm, addr, current))
-	return FALSE;
-      addr += current;
-      rstrm->fbtbc -= current;
-      len -= current;
-    }
-  return TRUE;
-}
-
-static bool_t
-xdrrec_putbytes (XDR *xdrs, const char *addr, u_int len)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  u_int current;
-
-  while (len > 0)
-    {
-      current = rstrm->out_boundry - rstrm->out_finger;
-      current = (len < current) ? len : current;
-      memcpy (rstrm->out_finger, addr, current);
-      rstrm->out_finger += current;
-      addr += current;
-      len -= current;
-      if (rstrm->out_finger == rstrm->out_boundry && len > 0)
-	{
-	  rstrm->frag_sent = TRUE;
-	  if (!flush_out (rstrm, FALSE))
-	    return FALSE;
-	}
-    }
-  return TRUE;
-}
-
-static u_int
-xdrrec_getpos (const XDR *xdrs)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  long pos;
-
-  pos = lseek ((int) (long) rstrm->tcp_handle, (long) 0, 1);
-  if (pos != -1)
-    switch (xdrs->x_op)
-      {
-
-      case XDR_ENCODE:
-	pos += rstrm->out_finger - rstrm->out_base;
-	break;
-
-      case XDR_DECODE:
-	pos -= rstrm->in_boundry - rstrm->in_finger;
-	break;
-
-      default:
-	pos = (u_int) - 1;
-	break;
-      }
-  return (u_int) pos;
-}
-
-static bool_t
-xdrrec_setpos (XDR *xdrs, u_int pos)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  u_int currpos = xdrrec_getpos (xdrs);
-  int delta = currpos - pos;
-  caddr_t newpos;
-
-  if ((int) currpos != -1)
-    switch (xdrs->x_op)
-      {
-
-      case XDR_ENCODE:
-	newpos = rstrm->out_finger - delta;
-	if (newpos > (caddr_t) rstrm->frag_header &&
-	    newpos < rstrm->out_boundry)
-	  {
-	    rstrm->out_finger = newpos;
-	    return TRUE;
-	  }
-	break;
-
-      case XDR_DECODE:
-	newpos = rstrm->in_finger - delta;
-	if ((delta < (int) (rstrm->fbtbc)) &&
-	    (newpos <= rstrm->in_boundry) &&
-	    (newpos >= rstrm->in_base))
-	  {
-	    rstrm->in_finger = newpos;
-	    rstrm->fbtbc -= delta;
-	    return TRUE;
-	  }
-	break;
-
-      default:
-	break;
-      }
-  return FALSE;
-}
-
-static int32_t *
-xdrrec_inline (XDR *xdrs, u_int len)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  int32_t *buf = NULL;
-
-  switch (xdrs->x_op)
-    {
-
-    case XDR_ENCODE:
-      if ((rstrm->out_finger + len) <= rstrm->out_boundry)
-	{
-	  buf = (int32_t *) rstrm->out_finger;
-	  rstrm->out_finger += len;
-	}
-      break;
-
-    case XDR_DECODE:
-      if ((len <= rstrm->fbtbc) &&
-	  ((rstrm->in_finger + len) <= rstrm->in_boundry))
-	{
-	  buf = (int32_t *) rstrm->in_finger;
-	  rstrm->fbtbc -= len;
-	  rstrm->in_finger += len;
-	}
-      break;
-
-    default:
-      break;
-    }
-  return buf;
-}
-
-static void
-xdrrec_destroy (XDR *xdrs)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-
-  mem_free (rstrm->the_buffer,
-	    rstrm->sendsize + rstrm->recvsize + BYTES_PER_XDR_UNIT);
-  mem_free ((caddr_t) rstrm, sizeof (RECSTREAM));
-}
-
-/*
- * Exported routines to manage xdr records
- */
-
-/*
- * Before reading (deserializing from the stream, one should always call
- * this procedure to guarantee proper record alignment.
- */
-bool_t
-xdrrec_skiprecord (XDR *xdrs)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-
-  while (rstrm->fbtbc > 0 || (!rstrm->last_frag))
-    {
-      if (!skip_input_bytes (rstrm, rstrm->fbtbc))
-	return FALSE;
-      rstrm->fbtbc = 0;
-      if ((!rstrm->last_frag) && (!set_input_fragment (rstrm)))
-	return FALSE;
-    }
-  rstrm->last_frag = FALSE;
-  return TRUE;
-}
-libc_hidden_def(xdrrec_skiprecord)
-
-/*
- * Lookahead function.
- * Returns TRUE iff there is no more input in the buffer
- * after consuming the rest of the current record.
- */
-bool_t
-xdrrec_eof (XDR *xdrs)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-
-  while (rstrm->fbtbc > 0 || (!rstrm->last_frag))
-    {
-      if (!skip_input_bytes (rstrm, rstrm->fbtbc))
-	return TRUE;
-      rstrm->fbtbc = 0;
-      if ((!rstrm->last_frag) && (!set_input_fragment (rstrm)))
-	return TRUE;
-    }
-  if (rstrm->in_finger == rstrm->in_boundry)
-    return TRUE;
-  return FALSE;
-}
-libc_hidden_def(xdrrec_eof)
-
-/*
- * The client must tell the package when an end-of-record has occurred.
- * The second parameter tells whether the record should be flushed to the
- * (output) tcp stream.  (This lets the package support batched or
- * pipelined procedure calls.)  TRUE => immediate flush to tcp connection.
- */
-bool_t
-xdrrec_endofrecord (XDR *xdrs, bool_t sendnow)
-{
-  RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private;
-  u_long len;		/* fragment length */
-
-  if (sendnow || rstrm->frag_sent
-      || rstrm->out_finger + BYTES_PER_XDR_UNIT >= rstrm->out_boundry)
-    {
-      rstrm->frag_sent = FALSE;
-      return flush_out (rstrm, TRUE);
-    }
-  len = (rstrm->out_finger - (char *) rstrm->frag_header
-	 - BYTES_PER_XDR_UNIT);
-  *rstrm->frag_header = htonl ((u_long) len | LAST_FRAG);
-  rstrm->frag_header = (u_int32_t *) rstrm->out_finger;
-  rstrm->out_finger += BYTES_PER_XDR_UNIT;
-  return TRUE;
-}
-libc_hidden_def(xdrrec_endofrecord)
-
-/*
- * Internal useful routines
- */
-static bool_t
-internal_function
-flush_out (RECSTREAM *rstrm, bool_t eor)
-{
-  u_long eormask = (eor == TRUE) ? LAST_FRAG : 0;
-  u_long len = (rstrm->out_finger - (char *) rstrm->frag_header
-		- BYTES_PER_XDR_UNIT);
-
-  *rstrm->frag_header = htonl (len | eormask);
-  len = rstrm->out_finger - rstrm->out_base;
-  if ((*(rstrm->writeit)) (rstrm->tcp_handle, rstrm->out_base, (int) len)
-      != (int) len)
-    return FALSE;
-  rstrm->frag_header = (u_int32_t *) rstrm->out_base;
-  rstrm->out_finger = (caddr_t) rstrm->out_base + BYTES_PER_XDR_UNIT;
-  return TRUE;
-}
-
-static bool_t	/* knows nothing about records!  Only about input buffers */
-fill_input_buf (RECSTREAM *rstrm)
-{
-  caddr_t where;
-  size_t i;
-  int len;
-
-  where = rstrm->in_base;
-  i = (size_t) rstrm->in_boundry % BYTES_PER_XDR_UNIT;
-  where += i;
-  len = rstrm->in_size - i;
-  if ((len = (*(rstrm->readit)) (rstrm->tcp_handle, where, len)) == -1)
-    return FALSE;
-  rstrm->in_finger = where;
-  where += len;
-  rstrm->in_boundry = where;
-  return TRUE;
-}
-
-static bool_t	/* knows nothing about records!  Only about input buffers */
-internal_function
-get_input_bytes (RECSTREAM *rstrm, caddr_t addr, int len)
-{
-  int current;
-
-  while (len > 0)
-    {
-      current = rstrm->in_boundry - rstrm->in_finger;
-      if (current == 0)
-	{
-	  if (!fill_input_buf (rstrm))
-	    return FALSE;
-	  continue;
-	}
-      current = (len < current) ? len : current;
-      memcpy (addr, rstrm->in_finger, current);
-      rstrm->in_finger += current;
-      addr += current;
-      len -= current;
-    }
-  return TRUE;
-}
-
-static bool_t /* next two bytes of the input stream are treated as a header */
-internal_function
-set_input_fragment (RECSTREAM *rstrm)
-{
-  uint32_t header;
-
-  if (! get_input_bytes (rstrm, (caddr_t)&header, BYTES_PER_XDR_UNIT))
-    return FALSE;
-  header = ntohl (header);
-  rstrm->last_frag = ((header & LAST_FRAG) == 0) ? FALSE : TRUE;
-  /*
-   * Sanity check. Try not to accept wildly incorrect fragment
-   * sizes. Unfortunately, only a size of zero can be identified as
-   * 'wildely incorrect', and this only, if it is not the last
-   * fragment of a message. Ridiculously large fragment sizes may look
-   * wrong, but we don't have any way to be certain that they aren't
-   * what the client actually intended to send us. Many existing RPC
-   * implementations may sent a fragment of size zero as the last
-   * fragment of a message.
-   */
-  if (header == 0)
-    return FALSE;
-  rstrm->fbtbc = header & ~LAST_FRAG;
-  return TRUE;
-}
-
-static bool_t	/* consumes input bytes; knows nothing about records! */
-internal_function
-skip_input_bytes (RECSTREAM *rstrm, long cnt)
-{
-  int current;
-
-  while (cnt > 0)
-    {
-      current = rstrm->in_boundry - rstrm->in_finger;
-      if (current == 0)
-	{
-	  if (!fill_input_buf (rstrm))
-	    return FALSE;
-	  continue;
-	}
-      current = (cnt < current) ? cnt : current;
-      rstrm->in_finger += current;
-      cnt -= current;
-    }
-  return TRUE;
-}
-
-static u_int
-internal_function
-fix_buf_size (u_int s)
-{
-  if (s < 100)
-    s = 4000;
-  return RNDUP (s);
-}