Import glibc-mainline for 2006-08-16

git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d

1 files changed, 509 insertions, 0 deletions

diff --git a/libc/sunrpc/svc.c b/libc/sunrpc/svc.c
new file mode 100644
index 000000000..1e358e247
--- /dev/null
+++ b/libc/sunrpc/svc.c
@@ -0,0 +1,509 @@
+/*
+ * 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.c, Server-side remote procedure call interface.
+ *
+ * There are two sets of procedures here.  The xprt routines are
+ * for handling transport handles.  The svc routines handle the
+ * list of service routines.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <rpc/rpc.h>
+#include <rpc/svc.h>
+#include <rpc/pmap_clnt.h>
+#include <sys/poll.h>
+
+#ifdef _RPC_THREAD_SAFE_
+#define xports RPC_THREAD_VARIABLE(svc_xports_s)
+#else
+static SVCXPRT **xports;
+#endif
+
+#define NULL_SVC ((struct svc_callout *)0)
+#define	RQCRED_SIZE	400	/* this size is excessive */
+
+/* The services list
+   Each entry represents a set of procedures (an rpc program).
+   The dispatch routine takes request structs and runs the
+   appropriate procedure. */
+struct svc_callout {
+  struct svc_callout *sc_next;
+  rpcprog_t sc_prog;
+  rpcvers_t sc_vers;
+  void (*sc_dispatch) (struct svc_req *, SVCXPRT *);
+};
+#ifdef _RPC_THREAD_SAFE_
+#define svc_head RPC_THREAD_VARIABLE(svc_head_s)
+#else
+static struct svc_callout *svc_head;
+#endif
+
+/* ***************  SVCXPRT related stuff **************** */
+
+/* Activate a transport handle. */
+void
+xprt_register (SVCXPRT *xprt)
+{
+  register int sock = xprt->xp_sock;
+  register int i;
+
+  if (xports == NULL)
+    {
+      xports = (SVCXPRT **) malloc (_rpc_dtablesize () * sizeof (SVCXPRT *));
+      if (xports == NULL) /* Donīt add handle */
+	return;
+    }
+
+  if (sock < _rpc_dtablesize ())
+    {
+      struct pollfd *new_svc_pollfd;
+
+      xports[sock] = xprt;
+      if (sock < FD_SETSIZE)
+	FD_SET (sock, &svc_fdset);
+
+      /* Check if we have an empty slot */
+      for (i = 0; i < svc_max_pollfd; ++i)
+	if (svc_pollfd[i].fd == -1)
+	  {
+	    svc_pollfd[i].fd = sock;
+	    svc_pollfd[i].events = (POLLIN | POLLPRI |
+				    POLLRDNORM | POLLRDBAND);
+	    return;
+	  }
+
+      new_svc_pollfd = (struct pollfd *) realloc (svc_pollfd,
+						  sizeof (struct pollfd)
+						  * (svc_max_pollfd + 1));
+      if (new_svc_pollfd == NULL) /* Out of memory */
+	return;
+      svc_pollfd = new_svc_pollfd;
+      ++svc_max_pollfd;
+
+      svc_pollfd[svc_max_pollfd - 1].fd = sock;
+      svc_pollfd[svc_max_pollfd - 1].events = (POLLIN | POLLPRI |
+					       POLLRDNORM | POLLRDBAND);
+    }
+}
+libc_hidden_def (xprt_register)
+
+/* De-activate a transport handle. */
+void
+xprt_unregister (SVCXPRT *xprt)
+{
+  register int sock = xprt->xp_sock;
+  register int i;
+
+  if ((sock < _rpc_dtablesize ()) && (xports[sock] == xprt))
+    {
+      xports[sock] = (SVCXPRT *) 0;
+
+      if (sock < FD_SETSIZE)
+	FD_CLR (sock, &svc_fdset);
+
+      for (i = 0; i < svc_max_pollfd; ++i)
+	if (svc_pollfd[i].fd == sock)
+	  svc_pollfd[i].fd = -1;
+    }
+}
+libc_hidden_def (xprt_unregister)
+
+
+/* ********************** CALLOUT list related stuff ************* */
+
+/* Search the callout list for a program number, return the callout
+   struct. */
+static struct svc_callout *
+svc_find (rpcprog_t prog, rpcvers_t vers, struct svc_callout **prev)
+{
+  register struct svc_callout *s, *p;
+
+  p = NULL_SVC;
+  for (s = svc_head; s != NULL_SVC; s = s->sc_next)
+    {
+      if ((s->sc_prog == prog) && (s->sc_vers == vers))
+	goto done;
+      p = s;
+    }
+done:
+  *prev = p;
+  return s;
+}
+
+/* Add a service program to the callout list.
+   The dispatch routine will be called when a rpc request for this
+   program number comes in. */
+bool_t
+svc_register (SVCXPRT * xprt, rpcprog_t prog, rpcvers_t vers,
+	      void (*dispatch) (struct svc_req *, SVCXPRT *),
+	      rpcproc_t protocol)
+{
+  struct svc_callout *prev;
+  register struct svc_callout *s;
+
+  if ((s = svc_find (prog, vers, &prev)) != NULL_SVC)
+    {
+      if (s->sc_dispatch == dispatch)
+	goto pmap_it;		/* he is registering another xptr */
+      return FALSE;
+    }
+  s = (struct svc_callout *) mem_alloc (sizeof (struct svc_callout));
+  if (s == (struct svc_callout *) 0)
+    return FALSE;
+
+  s->sc_prog = prog;
+  s->sc_vers = vers;
+  s->sc_dispatch = dispatch;
+  s->sc_next = svc_head;
+  svc_head = s;
+
+pmap_it:
+  /* now register the information with the local binder service */
+  if (protocol)
+    return pmap_set (prog, vers, protocol, xprt->xp_port);
+
+  return TRUE;
+}
+libc_hidden_def (svc_register)
+
+/* Remove a service program from the callout list. */
+void
+svc_unregister (rpcprog_t prog, rpcvers_t vers)
+{
+  struct svc_callout *prev;
+  register struct svc_callout *s;
+
+  if ((s = svc_find (prog, vers, &prev)) == NULL_SVC)
+    return;
+
+  if (prev == NULL_SVC)
+    svc_head = s->sc_next;
+  else
+    prev->sc_next = s->sc_next;
+
+  s->sc_next = NULL_SVC;
+  mem_free ((char *) s, (u_int) sizeof (struct svc_callout));
+  /* now unregister the information with the local binder service */
+  pmap_unset (prog, vers);
+}
+libc_hidden_def (svc_unregister)
+
+/* ******************* REPLY GENERATION ROUTINES  ************ */
+
+/* Send a reply to an rpc request */
+bool_t
+svc_sendreply (register SVCXPRT *xprt, xdrproc_t xdr_results,
+	       caddr_t xdr_location)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = SUCCESS;
+  rply.acpted_rply.ar_results.where = xdr_location;
+  rply.acpted_rply.ar_results.proc = xdr_results;
+  return SVC_REPLY (xprt, &rply);
+}
+INTDEF (svc_sendreply)
+
+/* No procedure error reply */
+void
+svcerr_noproc (register SVCXPRT *xprt)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = PROC_UNAVAIL;
+  SVC_REPLY (xprt, &rply);
+}
+
+/* Can't decode args error reply */
+void
+svcerr_decode (register SVCXPRT *xprt)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = GARBAGE_ARGS;
+  SVC_REPLY (xprt, &rply);
+}
+INTDEF (svcerr_decode)
+
+/* Some system error */
+void
+svcerr_systemerr (register SVCXPRT *xprt)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = SYSTEM_ERR;
+  SVC_REPLY (xprt, &rply);
+}
+
+/* Authentication error reply */
+void
+svcerr_auth (SVCXPRT *xprt, enum auth_stat why)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_DENIED;
+  rply.rjcted_rply.rj_stat = AUTH_ERROR;
+  rply.rjcted_rply.rj_why = why;
+  SVC_REPLY (xprt, &rply);
+}
+libc_hidden_def (svcerr_auth)
+
+/* Auth too weak error reply */
+void
+svcerr_weakauth (SVCXPRT *xprt)
+{
+  svcerr_auth (xprt, AUTH_TOOWEAK);
+}
+
+/* Program unavailable error reply */
+void
+svcerr_noprog (register SVCXPRT *xprt)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = PROG_UNAVAIL;
+  SVC_REPLY (xprt, &rply);
+}
+libc_hidden_def (svcerr_noprog)
+
+/* Program version mismatch error reply */
+void
+svcerr_progvers (register SVCXPRT *xprt, rpcvers_t low_vers,
+		 rpcvers_t high_vers)
+{
+  struct rpc_msg rply;
+
+  rply.rm_direction = REPLY;
+  rply.rm_reply.rp_stat = MSG_ACCEPTED;
+  rply.acpted_rply.ar_verf = xprt->xp_verf;
+  rply.acpted_rply.ar_stat = PROG_MISMATCH;
+  rply.acpted_rply.ar_vers.low = low_vers;
+  rply.acpted_rply.ar_vers.high = high_vers;
+  SVC_REPLY (xprt, &rply);
+}
+libc_hidden_def (svcerr_progvers)
+
+/* ******************* SERVER INPUT STUFF ******************* */
+
+/*
+ * Get server side input from some transport.
+ *
+ * Statement of authentication parameters management:
+ * This function owns and manages all authentication parameters, specifically
+ * the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
+ * the "cooked" credentials (rqst->rq_clntcred).
+ * However, this function does not know the structure of the cooked
+ * credentials, so it make the following assumptions:
+ *   a) the structure is contiguous (no pointers), and
+ *   b) the cred structure size does not exceed RQCRED_SIZE bytes.
+ * In all events, all three parameters are freed upon exit from this routine.
+ * The storage is trivially management on the call stack in user land, but
+ * is mallocated in kernel land.
+ */
+
+void
+svc_getreq (int rdfds)
+{
+  fd_set readfds;
+
+  FD_ZERO (&readfds);
+  readfds.fds_bits[0] = rdfds;
+  INTUSE(svc_getreqset) (&readfds);
+}
+INTDEF (svc_getreq)
+
+void
+svc_getreqset (fd_set *readfds)
+{
+  register fd_mask mask;
+  register fd_mask *maskp;
+  register int setsize;
+  register int sock;
+  register int bit;
+
+  setsize = _rpc_dtablesize ();
+  if (setsize > FD_SETSIZE)
+    setsize = FD_SETSIZE;
+  maskp = readfds->fds_bits;
+  for (sock = 0; sock < setsize; sock += NFDBITS)
+    for (mask = *maskp++; (bit = ffsl (mask)); mask ^= (1L << (bit - 1)))
+      INTUSE(svc_getreq_common) (sock + bit - 1);
+}
+INTDEF (svc_getreqset)
+
+void
+svc_getreq_poll (struct pollfd *pfdp, int pollretval)
+{
+  if (pollretval == 0)
+    return;
+
+  register int fds_found;
+  for (int i = fds_found = 0; i < svc_max_pollfd; ++i)
+    {
+      register struct pollfd *p = &pfdp[i];
+
+      if (p->fd != -1 && p->revents)
+	{
+	  /* fd has input waiting */
+	  if (p->revents & POLLNVAL)
+	    xprt_unregister (xports[p->fd]);
+	  else
+	    INTUSE(svc_getreq_common) (p->fd);
+
+	  if (++fds_found >= pollretval)
+	    break;
+	}
+    }
+}
+INTDEF (svc_getreq_poll)
+
+
+void
+svc_getreq_common (const int fd)
+{
+  enum xprt_stat stat;
+  struct rpc_msg msg;
+  register SVCXPRT *xprt;
+  char cred_area[2 * MAX_AUTH_BYTES + RQCRED_SIZE];
+  msg.rm_call.cb_cred.oa_base = cred_area;
+  msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
+
+  xprt = xports[fd];
+  /* Do we control fd? */
+  if (xprt == NULL)
+     return;
+
+  /* now receive msgs from xprtprt (support batch calls) */
+  do
+    {
+      if (SVC_RECV (xprt, &msg))
+	{
+	  /* now find the exported program and call it */
+	  struct svc_callout *s;
+	  struct svc_req r;
+	  enum auth_stat why;
+	  rpcvers_t low_vers;
+	  rpcvers_t high_vers;
+	  int prog_found;
+
+	  r.rq_clntcred = &(cred_area[2 * MAX_AUTH_BYTES]);
+	  r.rq_xprt = xprt;
+	  r.rq_prog = msg.rm_call.cb_prog;
+	  r.rq_vers = msg.rm_call.cb_vers;
+	  r.rq_proc = msg.rm_call.cb_proc;
+	  r.rq_cred = msg.rm_call.cb_cred;
+
+	  /* first authenticate the message */
+	  /* Check for null flavor and bypass these calls if possible */
+
+	  if (msg.rm_call.cb_cred.oa_flavor == AUTH_NULL)
+	    {
+	      r.rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
+	      r.rq_xprt->xp_verf.oa_length = 0;
+	    }
+	  else if ((why = INTUSE(_authenticate) (&r, &msg)) != AUTH_OK)
+	    {
+	      svcerr_auth (xprt, why);
+	      goto call_done;
+	    }
+
+	  /* now match message with a registered service */
+	  prog_found = FALSE;
+	  low_vers = 0 - 1;
+	  high_vers = 0;
+
+	  for (s = svc_head; s != NULL_SVC; s = s->sc_next)
+	    {
+	      if (s->sc_prog == r.rq_prog)
+		{
+		  if (s->sc_vers == r.rq_vers)
+		    {
+		      (*s->sc_dispatch) (&r, xprt);
+		      goto call_done;
+		    }
+		  /* found correct version */
+		  prog_found = TRUE;
+		  if (s->sc_vers < low_vers)
+		    low_vers = s->sc_vers;
+		  if (s->sc_vers > high_vers)
+		    high_vers = s->sc_vers;
+		}
+	      /* found correct program */
+	    }
+	  /* if we got here, the program or version
+	     is not served ... */
+	  if (prog_found)
+	    svcerr_progvers (xprt, low_vers, high_vers);
+	  else
+	    svcerr_noprog (xprt);
+	  /* Fall through to ... */
+	}
+    call_done:
+      if ((stat = SVC_STAT (xprt)) == XPRT_DIED)
+	{
+	  SVC_DESTROY (xprt);
+	  break;
+	}
+    }
+  while (stat == XPRT_MOREREQS);
+}
+INTDEF (svc_getreq_common)
+
+#ifdef _RPC_THREAD_SAFE_
+
+void
+__rpc_thread_svc_cleanup (void)
+{
+  struct svc_callout *svcp;
+
+  while ((svcp = svc_head) != NULL)
+    svc_unregister (svcp->sc_prog, svcp->sc_vers);
+}
+
+#endif /* _RPC_THREAD_SAFE_ */