Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and

associated changes that had to happen to make this possible as well as
bugs fixed along the way.

  Bring in required TLI library routines to support this.

  Since we don't support TLI we've essentially copied what NetBSD
  has done, adding a thin layer to emulate direct the TLI calls
  into BSD socket calls.

  This is mostly from Sun's tirpc release that was made in 1994,
  however some fixes were backported from the 1999 release (supposedly
  only made available after this porting effort was underway).

  The submitter has agreed to continue on and bring us up to the
  1999 release.

  Several key features are introduced with this update:
    Client calls are thread safe. (1999 code has server side thread
    safe)
    Updated, a more modern interface.

  Many userland updates were done to bring the code up to par with
  the recent RPC API.

  There is an update to the pthreads library, a function
  pthread_main_np() was added to emulate a function of Sun's threads
  library.

  While we're at it, bring in NetBSD's lockd, it's been far too
  long of a wait.

  New rpcbind(8) replaces portmap(8) (supporting communication over
  an authenticated Unix-domain socket, and by default only allowing
  set and unset requests over that channel). It's much more secure
  than the old portmapper.

  Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
  to support TI-RPC and to support IPV6.

  Umount(8) is also fixed to unmount pathnames longer than 80 chars,
  which are currently truncated by the Kernel statfs structure.

Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul

1 files changed, 313 insertions, 0 deletions

diff --git a/lib/libc/rpc/svc_generic.c b/lib/libc/rpc/svc_generic.c
new file mode 100644
index 0000000..773118d
--- /dev/null
+++ b/lib/libc/rpc/svc_generic.c
@@ -0,0 +1,313 @@
+/*	$NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $	*/
+/*	$FreeBSD$ */
+
+/*
+ * 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
+ */
+
+/*
+ * Copyright (c) 1986-1991 by Sun Microsystems Inc.
+ */
+
+/* #ident	"@(#)svc_generic.c	1.19	94/04/24 SMI" */
+
+#if 0
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
+#endif
+#endif
+
+/*
+ * svc_generic.c, Server side for RPC.
+ *
+ */
+
+#include "reentrant.h"
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <rpc/rpc.h>
+#include <rpc/nettype.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <err.h>
+#include "un-namespace.h"
+
+#include "rpc_com.h"
+
+extern int __svc_vc_setflag __P((SVCXPRT *, int));
+
+/*
+ * The highest level interface for server creation.
+ * It tries for all the nettokens in that particular class of token
+ * and returns the number of handles it can create and/or find.
+ *
+ * It creates a link list of all the handles it could create.
+ * If svc_create() is called multiple times, it uses the handle
+ * created earlier instead of creating a new handle every time.
+ */
+int
+svc_create(dispatch, prognum, versnum, nettype)
+	void (*dispatch) __P((struct svc_req *, SVCXPRT *));
+	rpcprog_t prognum;		/* Program number */
+	rpcvers_t versnum;		/* Version number */
+	const char *nettype;		/* Networktype token */
+{
+	struct xlist {
+		SVCXPRT *xprt;		/* Server handle */
+		struct xlist *next;	/* Next item */
+	} *l;
+	static struct xlist *xprtlist;	/* A link list of all the handles */
+	int num = 0;
+	SVCXPRT *xprt;
+	struct netconfig *nconf;
+	void *handle;
+	extern mutex_t xprtlist_lock;
+
+/* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */
+
+	if ((handle = __rpc_setconf(nettype)) == NULL) {
+		warnx("svc_create: unknown protocol");
+		return (0);
+	}
+	while ((nconf = __rpc_getconf(handle)) != NULL) {
+		mutex_lock(&xprtlist_lock);
+		for (l = xprtlist; l; l = l->next) {
+			if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) {
+				/* Found an old one, use it */
+				(void) rpcb_unset(prognum, versnum, nconf);
+				if (svc_reg(l->xprt, prognum, versnum,
+					dispatch, nconf) == FALSE)
+					warnx(
+		"svc_create: could not register prog %u vers %u on %s",
+					(unsigned)prognum, (unsigned)versnum,
+					 nconf->nc_netid);
+				else
+					num++;
+				break;
+			}
+		}
+		if (l == NULL) {
+			/* It was not found. Now create a new one */
+			xprt = svc_tp_create(dispatch, prognum, versnum, nconf);
+			if (xprt) {
+				l = (struct xlist *)malloc(sizeof (*l));
+				if (l == NULL) {
+					warnx("svc_create: no memory");
+					mutex_unlock(&xprtlist_lock);
+					return (0);
+				}
+				l->xprt = xprt;
+				l->next = xprtlist;
+				xprtlist = l;
+				num++;
+			}
+		}
+		mutex_unlock(&xprtlist_lock);
+	}
+	__rpc_endconf(handle);
+	/*
+	 * In case of num == 0; the error messages are generated by the
+	 * underlying layers; and hence not needed here.
+	 */
+	return (num);
+}
+
+/*
+ * The high level interface to svc_tli_create().
+ * It tries to create a server for "nconf" and registers the service
+ * with the rpcbind. It calls svc_tli_create();
+ */
+SVCXPRT *
+svc_tp_create(dispatch, prognum, versnum, nconf)
+	void (*dispatch) __P((struct svc_req *, SVCXPRT *));
+	rpcprog_t prognum;		/* Program number */
+	rpcvers_t versnum;		/* Version number */
+	const struct netconfig *nconf; /* Netconfig structure for the network */
+{
+	SVCXPRT *xprt;
+
+	if (nconf == NULL) {
+		warnx(
+	"svc_tp_create: invalid netconfig structure for prog %u vers %u",
+				(unsigned)prognum, (unsigned)versnum);
+		return (NULL);
+	}
+	xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
+	if (xprt == NULL) {
+		return (NULL);
+	}
+	/*LINTED const castaway*/
+	(void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
+	if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
+		warnx(
+		"svc_tp_create: Could not register prog %u vers %u on %s",
+				(unsigned)prognum, (unsigned)versnum,
+				nconf->nc_netid);
+		SVC_DESTROY(xprt);
+		return (NULL);
+	}
+	return (xprt);
+}
+
+/*
+ * If fd is RPC_ANYFD, then it opens a fd for the given transport
+ * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
+ * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
+ * NULL bindadr and Connection oriented transports, the value of qlen
+ * is set to 8.
+ *
+ * If sendsz or recvsz are zero, their default values are chosen.
+ */
+SVCXPRT *
+svc_tli_create(fd, nconf, bindaddr, sendsz, recvsz)
+	int fd;				/* Connection end point */
+	const struct netconfig *nconf;	/* Netconfig struct for nettoken */
+	const struct t_bind *bindaddr;	/* Local bind address */
+	u_int sendsz;			/* Max sendsize */
+	u_int recvsz;			/* Max recvsize */
+{
+	SVCXPRT *xprt = NULL;		/* service handle */
+	bool_t madefd = FALSE;		/* whether fd opened here  */
+	struct __rpc_sockinfo si;
+	struct sockaddr_storage ss;
+	socklen_t slen;
+
+	if (fd == RPC_ANYFD) {
+		if (nconf == NULL) {
+			warnx("svc_tli_create: invalid netconfig");
+			return (NULL);
+		}
+		fd = __rpc_nconf2fd(nconf);
+		if (fd == -1) {
+			warnx(
+			    "svc_tli_create: could not open connection for %s",
+					nconf->nc_netid);
+			return (NULL);
+		}
+		__rpc_nconf2sockinfo(nconf, &si);
+		madefd = TRUE;
+	} else {
+		/*
+		 * It is an open descriptor. Get the transport info.
+		 */
+		if (!__rpc_fd2sockinfo(fd, &si)) {
+			warnx(
+		"svc_tli_create: could not get transport information");
+			return (NULL);
+		}
+	}
+
+	/*
+	 * If the fd is unbound, try to bind it.
+	 */
+	if (madefd || !__rpc_sockisbound(fd)) {
+		if (bindaddr == NULL) {
+			if (bindresvport(fd, NULL) < 0) {
+				memset(&ss, 0, sizeof ss);
+				ss.ss_family = si.si_af;
+				ss.ss_len = si.si_alen;
+				if (_bind(fd, (struct sockaddr *)(void *)&ss,
+				    (socklen_t)si.si_alen) < 0) {
+					warnx(
+			"svc_tli_create: could not bind to anonymous port");
+					goto freedata;
+				}
+			}
+			_listen(fd, SOMAXCONN);
+		} else {
+			if (_bind(fd,
+			    (struct sockaddr *)(void *)&bindaddr->addr.buf,
+			    (socklen_t)si.si_alen) < 0) {
+				warnx(
+		"svc_tli_create: could not bind to requested address");
+				goto freedata;
+			}
+			_listen(fd, (int)bindaddr->qlen);
+		}
+			
+	}
+	/*
+	 * call transport specific function.
+	 */
+	switch (si.si_socktype) {
+		case SOCK_STREAM:
+			slen = sizeof ss;
+			if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
+			    == 0) {
+				/* accepted socket */
+				xprt = svc_fd_create(fd, sendsz, recvsz);
+			} else
+				xprt = svc_vc_create(fd, sendsz, recvsz);
+			if (!nconf || !xprt)
+				break;
+#if 0
+			/* XXX fvdl */
+			if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
+			    strcmp(nconf->nc_protofmly, "inet6") == 0)
+				(void) __svc_vc_setflag(xprt, TRUE);
+#endif
+			break;
+		case SOCK_DGRAM:
+			xprt = svc_dg_create(fd, sendsz, recvsz);
+			break;
+		default:
+			warnx("svc_tli_create: bad service type");
+			goto freedata;
+	}
+
+	if (xprt == NULL)
+		/*
+		 * The error messages here are spitted out by the lower layers:
+		 * svc_vc_create(), svc_fd_create() and svc_dg_create().
+		 */
+		goto freedata;
+
+	/* Fill in type of service */
+	xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
+
+	if (nconf) {
+		xprt->xp_netid = strdup(nconf->nc_netid);
+		xprt->xp_tp = strdup(nconf->nc_device);
+	}
+	return (xprt);
+
+freedata:
+	if (madefd)
+		(void)_close(fd);
+	if (xprt) {
+		if (!madefd) /* so that svc_destroy doesnt close fd */
+			xprt->xp_fd = RPC_ANYFD;
+		SVC_DESTROY(xprt);
+	}
+	return (NULL);
+}