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, 567 deletions

diff --git a/libc/inet/rpc/svc_udp.c b/libc/inet/rpc/svc_udp.c
deleted file mode 100644
index 5b8a8d297..000000000
--- a/libc/inet/rpc/svc_udp.c
+++ /dev/null
@@ -1,567 +0,0 @@
-/* @(#)svc_udp.c	2.2 88/07/29 4.0 RPCSRC */
-/*
- * 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
- */
-#if 0
-static char sccsid[] = "@(#)svc_udp.c 1.24 87/08/11 Copyr 1984 Sun Micro";
-#endif
-
-/*
- * svc_udp.c,
- * Server side for UDP/IP based RPC.  (Does some caching in the hopes of
- * achieving execute-at-most-once semantics.)
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include "rpc_private.h"
-#include <sys/socket.h>
-#include <errno.h>
-
-#ifdef IP_PKTINFO
-#include <sys/uio.h>
-#endif
-
-#define rpc_buffer(xprt) ((xprt)->xp_p1)
-#ifndef MAX
-#define MAX(a, b)     ((a > b) ? a : b)
-#endif
-
-static bool_t svcudp_recv (SVCXPRT *, struct rpc_msg *);
-static bool_t svcudp_reply (SVCXPRT *, struct rpc_msg *);
-static enum xprt_stat svcudp_stat (SVCXPRT *);
-static bool_t svcudp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
-static bool_t svcudp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
-static void svcudp_destroy (SVCXPRT *);
-
-static const struct xp_ops svcudp_op =
-{
-  svcudp_recv,
-  svcudp_stat,
-  svcudp_getargs,
-  svcudp_reply,
-  svcudp_freeargs,
-  svcudp_destroy
-};
-
-static int cache_get (SVCXPRT *, struct rpc_msg *, char **replyp,
-		      u_long *replylenp);
-static void cache_set (SVCXPRT *xprt, u_long replylen);
-
-/*
- * kept in xprt->xp_p2
- */
-struct svcudp_data
-  {
-    u_int su_iosz;		/* byte size of send.recv buffer */
-    u_long su_xid;		/* transaction id */
-    XDR su_xdrs;		/* XDR handle */
-    char su_verfbody[MAX_AUTH_BYTES];	/* verifier body */
-    char *su_cache;		/* cached data, NULL if no cache */
-  };
-#define	su_data(xprt)	((struct svcudp_data *)(xprt->xp_p2))
-
-/*
- * Usage:
- *      xprt = svcudp_create(sock);
- *
- * If sock<0 then a socket is created, else sock is used.
- * If the socket, sock is not bound to a port then svcudp_create
- * binds it to an arbitrary port.  In any (successful) case,
- * xprt->xp_sock is the registered socket number and xprt->xp_port is the
- * associated port number.
- * Once *xprt is initialized, it is registered as a transporter;
- * see (svc.h, xprt_register).
- * The routines returns NULL if a problem occurred.
- */
-SVCXPRT *
-svcudp_bufcreate (int sock, u_int sendsz, u_int recvsz)
-{
-  bool_t madesock = FALSE;
-  SVCXPRT *xprt;
-  struct svcudp_data *su;
-  struct sockaddr_in addr;
-  socklen_t len = sizeof (struct sockaddr_in);
-  int pad;
-  void *buf;
-
-  if (sock == RPC_ANYSOCK)
-    {
-      if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
-	{
-	  perror ("svcudp_create: socket creation problem");
-	  return (SVCXPRT *) NULL;
-	}
-      madesock = TRUE;
-    }
-  memset ((char *) &addr, 0, 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)
-    {
-      perror ("svcudp_create - cannot getsockname");
-      if (madesock)
-	(void) close (sock);
-      return (SVCXPRT *) NULL;
-    }
-  xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
-  su = (struct svcudp_data *) mem_alloc (sizeof (*su));
-  buf = mem_alloc (((MAX (sendsz, recvsz) + 3) / 4) * 4);
-  if (xprt == NULL || su == NULL || buf == NULL)
-    {
-      (void) fputs ("svcudp_create: out of memory\n", stderr);
-      mem_free (xprt, sizeof (SVCXPRT));
-      mem_free (su, sizeof (*su));
-      mem_free (buf, ((MAX (sendsz, recvsz) + 3) / 4) * 4);
-      return NULL;
-    }
-  su->su_iosz = ((MAX (sendsz, recvsz) + 3) / 4) * 4;
-  rpc_buffer (xprt) = buf;
-  xdrmem_create (&(su->su_xdrs), rpc_buffer (xprt), su->su_iosz, XDR_DECODE);
-  su->su_cache = NULL;
-  xprt->xp_p2 = (caddr_t) su;
-  xprt->xp_verf.oa_base = su->su_verfbody;
-  xprt->xp_ops = &svcudp_op;
-  xprt->xp_port = ntohs (addr.sin_port);
-  xprt->xp_sock = sock;
-
-#ifdef IP_PKTINFO
-  if ((sizeof (struct iovec) + sizeof (struct msghdr)
-       + sizeof(struct cmsghdr) + sizeof (struct in_pktinfo))
-      > sizeof (xprt->xp_pad))
-    {
-      (void) fputs ("svcudp_create: xp_pad is too small for IP_PKTINFO\n",
-		      stderr);
-      return NULL;
-    }
-  pad = 1;
-  if (setsockopt (sock, SOL_IP, IP_PKTINFO, (void *) &pad,
-		  sizeof (pad)) == 0)
-    /* Set the padding to all 1s. */
-    pad = 0xff;
-  else
-#endif
-    /* Clear the padding. */
-    pad = 0;
-  memset (&xprt->xp_pad [0], pad, sizeof (xprt->xp_pad));
-
-  xprt_register (xprt);
-  return xprt;
-}
-libc_hidden_def(svcudp_bufcreate)
-
-SVCXPRT *
-svcudp_create (int sock)
-{
-
-  return svcudp_bufcreate (sock, UDPMSGSIZE, UDPMSGSIZE);
-}
-libc_hidden_def(svcudp_create)
-
-static enum xprt_stat
-svcudp_stat (SVCXPRT *xprt attribute_unused)
-{
-
-  return XPRT_IDLE;
-}
-
-static bool_t
-svcudp_recv (SVCXPRT *xprt, struct rpc_msg *msg)
-{
-  struct svcudp_data *su = su_data (xprt);
-  XDR *xdrs = &(su->su_xdrs);
-  int rlen;
-  char *reply;
-  u_long replylen;
-  socklen_t len;
-
-  /* It is very tricky when you have IP aliases. We want to make sure
-     that we are sending the packet from the IP address where the
-     incoming packet is addressed to. H.J. */
-#ifdef IP_PKTINFO
-  struct iovec *iovp;
-  struct msghdr *mesgp;
-#endif
-
-again:
-  /* FIXME -- should xp_addrlen be a size_t?  */
-  len = (socklen_t) sizeof(struct sockaddr_in);
-#ifdef IP_PKTINFO
-  iovp = (struct iovec *) &xprt->xp_pad [0];
-  mesgp = (struct msghdr *) &xprt->xp_pad [sizeof (struct iovec)];
-  if (mesgp->msg_iovlen)
-    {
-      iovp->iov_base = rpc_buffer (xprt);
-      iovp->iov_len = su->su_iosz;
-      mesgp->msg_iov = iovp;
-      mesgp->msg_iovlen = 1;
-      mesgp->msg_name = &(xprt->xp_raddr);
-      mesgp->msg_namelen = len;
-      mesgp->msg_control = &xprt->xp_pad [sizeof (struct iovec)
-					  + sizeof (struct msghdr)];
-      mesgp->msg_controllen = sizeof(xprt->xp_pad)
-			      - sizeof (struct iovec) - sizeof (struct msghdr);
-      rlen = recvmsg (xprt->xp_sock, mesgp, 0);
-      if (rlen >= 0)
-	len = mesgp->msg_namelen;
-    }
-  else
-#endif
-    rlen = recvfrom (xprt->xp_sock, rpc_buffer (xprt),
-		     (int) su->su_iosz, 0,
-		     (struct sockaddr *) &(xprt->xp_raddr), &len);
-  xprt->xp_addrlen = len;
-  if (rlen == -1 && errno == EINTR)
-    goto again;
-  if (rlen < 16)		/* < 4 32-bit ints? */
-    return FALSE;
-  xdrs->x_op = XDR_DECODE;
-  XDR_SETPOS (xdrs, 0);
-  if (!xdr_callmsg (xdrs, msg))
-    return FALSE;
-  su->su_xid = msg->rm_xid;
-  if (su->su_cache != NULL)
-    {
-      if (cache_get (xprt, msg, &reply, &replylen))
-	{
-#ifdef IP_PKTINFO
-	  if (mesgp->msg_iovlen)
-	    {
-	      iovp->iov_base = reply;
-	      iovp->iov_len = replylen;
-	      (void) sendmsg (xprt->xp_sock, mesgp, 0);
-	    }
-	  else
-#endif
-	    (void) sendto (xprt->xp_sock, reply, (int) replylen, 0,
-			   (struct sockaddr *) &xprt->xp_raddr, len);
-	  return TRUE;
-	}
-    }
-  return TRUE;
-}
-
-static bool_t
-svcudp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
-{
-  struct svcudp_data *su = su_data (xprt);
-  XDR *xdrs = &(su->su_xdrs);
-  int slen, sent;
-  bool_t stat = FALSE;
-#ifdef IP_PKTINFO
-  struct iovec *iovp;
-  struct msghdr *mesgp;
-#endif
-
-  xdrs->x_op = XDR_ENCODE;
-  XDR_SETPOS (xdrs, 0);
-  msg->rm_xid = su->su_xid;
-  if (xdr_replymsg (xdrs, msg))
-    {
-      slen = (int) XDR_GETPOS (xdrs);
-#ifdef IP_PKTINFO
-      mesgp = (struct msghdr *) &xprt->xp_pad [sizeof (struct iovec)];
-      if (mesgp->msg_iovlen)
-	{
-	  iovp = (struct iovec *) &xprt->xp_pad [0];
-	  iovp->iov_base = rpc_buffer (xprt);
-	  iovp->iov_len = slen;
-	  sent = sendmsg (xprt->xp_sock, mesgp, 0);
-	}
-      else
-#endif
-	sent = sendto (xprt->xp_sock, rpc_buffer (xprt), slen, 0,
-		       (struct sockaddr *) &(xprt->xp_raddr),
-		       xprt->xp_addrlen);
-      if (sent == slen)
-	{
-	  stat = TRUE;
-	  if (su->su_cache && slen >= 0)
-	    {
-	      cache_set (xprt, (u_long) slen);
-	    }
-	}
-    }
-  return stat;
-}
-
-static bool_t
-svcudp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
-
-  return (*xdr_args) (&(su_data (xprt)->su_xdrs), args_ptr);
-}
-
-static bool_t
-svcudp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
-{
-  XDR *xdrs = &(su_data (xprt)->su_xdrs);
-
-  xdrs->x_op = XDR_FREE;
-  return (*xdr_args) (xdrs, args_ptr);
-}
-
-static void
-svcudp_destroy (SVCXPRT *xprt)
-{
-  struct svcudp_data *su = su_data (xprt);
-
-  xprt_unregister (xprt);
-  (void) close (xprt->xp_sock);
-  XDR_DESTROY (&(su->su_xdrs));
-  mem_free (rpc_buffer (xprt), su->su_iosz);
-  mem_free ((caddr_t) su, sizeof (struct svcudp_data));
-  mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
-}
-
-
-/***********this could be a separate file*********************/
-
-/*
- * Fifo cache for udp server
- * Copies pointers to reply buffers into fifo cache
- * Buffers are sent again if retransmissions are detected.
- */
-
-#define SPARSENESS 4		/* 75% sparse */
-
-#define CACHE_PERROR(msg)	\
-	(void) fprintf(stderr,"%s\n", msg)
-
-#define ALLOC(type, size)	\
-	(type *) mem_alloc((unsigned) (sizeof(type) * (size)))
-
-#define BZERO(addr, type, size)	 \
-	memset((char *) addr, 0, sizeof(type) * (int) (size))
-
-/*
- * An entry in the cache
- */
-typedef struct cache_node *cache_ptr;
-struct cache_node
-  {
-    /*
-     * Index into cache is xid, proc, vers, prog and address
-     */
-    u_long cache_xid;
-    u_long cache_proc;
-    u_long cache_vers;
-    u_long cache_prog;
-    struct sockaddr_in cache_addr;
-    /*
-     * The cached reply and length
-     */
-    char *cache_reply;
-    u_long cache_replylen;
-    /*
-     * Next node on the list, if there is a collision
-     */
-    cache_ptr cache_next;
-  };
-
-
-
-/*
- * The entire cache
- */
-struct udp_cache
-  {
-    u_long uc_size;		/* size of cache */
-    cache_ptr *uc_entries;	/* hash table of entries in cache */
-    cache_ptr *uc_fifo;		/* fifo list of entries in cache */
-    u_long uc_nextvictim;	/* points to next victim in fifo list */
-    u_long uc_prog;		/* saved program number */
-    u_long uc_vers;		/* saved version number */
-    u_long uc_proc;		/* saved procedure number */
-    struct sockaddr_in uc_addr;	/* saved caller's address */
-  };
-
-
-/*
- * the hashing function
- */
-#define CACHE_LOC(transp, xid)	\
- (xid % (SPARSENESS*((struct udp_cache *) su_data(transp)->su_cache)->uc_size))
-
-
-/*
- * Enable use of the cache.
- * Note: there is no disable.
- */
-int svcudp_enablecache (SVCXPRT *transp, u_long size);
-int
-svcudp_enablecache (SVCXPRT *transp, u_long size)
-{
-  struct svcudp_data *su = su_data (transp);
-  struct udp_cache *uc;
-
-  if (su->su_cache != NULL)
-    {
-      CACHE_PERROR ("enablecache: cache already enabled");
-      return 0;
-    }
-  uc = ALLOC (struct udp_cache, 1);
-  if (uc == NULL)
-    {
-      CACHE_PERROR ("enablecache: could not allocate cache");
-      return 0;
-    }
-  uc->uc_size = size;
-  uc->uc_nextvictim = 0;
-  uc->uc_entries = ALLOC (cache_ptr, size * SPARSENESS);
-  if (uc->uc_entries == NULL)
-    {
-      CACHE_PERROR ("enablecache: could not allocate cache data");
-      return 0;
-    }
-  BZERO (uc->uc_entries, cache_ptr, size * SPARSENESS);
-  uc->uc_fifo = ALLOC (cache_ptr, size);
-  if (uc->uc_fifo == NULL)
-    {
-      CACHE_PERROR ("enablecache: could not allocate cache fifo");
-      return 0;
-    }
-  BZERO (uc->uc_fifo, cache_ptr, size);
-  su->su_cache = (char *) uc;
-  return 1;
-}
-
-
-/*
- * Set an entry in the cache
- */
-static void
-cache_set (SVCXPRT *xprt, u_long replylen)
-{
-  cache_ptr victim;
-  cache_ptr *vicp;
-  struct svcudp_data *su = su_data (xprt);
-  struct udp_cache *uc = (struct udp_cache *) su->su_cache;
-  u_int loc;
-  char *newbuf;
-
-  /*
-   * Find space for the new entry, either by
-   * reusing an old entry, or by mallocing a new one
-   */
-  victim = uc->uc_fifo[uc->uc_nextvictim];
-  if (victim != NULL)
-    {
-      loc = CACHE_LOC (xprt, victim->cache_xid);
-      for (vicp = &uc->uc_entries[loc];
-	   *vicp != NULL && *vicp != victim;
-	   vicp = &(*vicp)->cache_next)
-	;
-      if (*vicp == NULL)
-	{
-	  CACHE_PERROR ("cache_set: victim not found");
-	  return;
-	}
-      *vicp = victim->cache_next;	/* remote from cache */
-      newbuf = victim->cache_reply;
-    }
-  else
-    {
-      victim = ALLOC (struct cache_node, 1);
-      if (victim == NULL)
-	{
-	  CACHE_PERROR ("cache_set: victim alloc failed");
-	  return;
-	}
-      newbuf = mem_alloc (su->su_iosz);
-      if (newbuf == NULL)
-	{
-	  CACHE_PERROR ("cache_set: could not allocate new rpc_buffer");
-	  return;
-	}
-    }
-
-  /*
-   * Store it away
-   */
-  victim->cache_replylen = replylen;
-  victim->cache_reply = rpc_buffer (xprt);
-  rpc_buffer (xprt) = newbuf;
-  xdrmem_create (&(su->su_xdrs), rpc_buffer (xprt), su->su_iosz, XDR_ENCODE);
-  victim->cache_xid = su->su_xid;
-  victim->cache_proc = uc->uc_proc;
-  victim->cache_vers = uc->uc_vers;
-  victim->cache_prog = uc->uc_prog;
-  victim->cache_addr = uc->uc_addr;
-  loc = CACHE_LOC (xprt, victim->cache_xid);
-  victim->cache_next = uc->uc_entries[loc];
-  uc->uc_entries[loc] = victim;
-  uc->uc_fifo[uc->uc_nextvictim++] = victim;
-  uc->uc_nextvictim %= uc->uc_size;
-}
-
-/*
- * Try to get an entry from the cache
- * return 1 if found, 0 if not found
- */
-static int
-cache_get (SVCXPRT *xprt, struct rpc_msg *msg, char **replyp, u_long *replylenp)
-{
-  u_int loc;
-  cache_ptr ent;
-  struct svcudp_data *su = su_data (xprt);
-  struct udp_cache *uc = (struct udp_cache *) su->su_cache;
-
-#define EQADDR(a1, a2)	(memcmp((char*)&a1, (char*)&a2, sizeof(a1)) == 0)
-
-  loc = CACHE_LOC (xprt, su->su_xid);
-  for (ent = uc->uc_entries[loc]; ent != NULL; ent = ent->cache_next)
-    {
-      if (ent->cache_xid == su->su_xid &&
-	  ent->cache_proc == uc->uc_proc &&
-	  ent->cache_vers == uc->uc_vers &&
-	  ent->cache_prog == uc->uc_prog &&
-	  EQADDR (ent->cache_addr, uc->uc_addr))
-	{
-	  *replyp = ent->cache_reply;
-	  *replylenp = ent->cache_replylen;
-	  return 1;
-	}
-    }
-  /*
-   * Failed to find entry
-   * Remember a few things so we can do a set later
-   */
-  uc->uc_proc = msg->rm_call.cb_proc;
-  uc->uc_vers = msg->rm_call.cb_vers;
-  uc->uc_prog = msg->rm_call.cb_prog;
-  memcpy (&uc->uc_addr, &xprt->xp_raddr, sizeof (uc->uc_addr));
-  return 0;
-}