vendor/krb5/1.15.1

1 files changed, 511 insertions, 0 deletions

diff --git a/src/lib/rpc/clnt_tcp.c b/src/lib/rpc/clnt_tcp.c
new file mode 100644
index 000000000000..02056fd40c7c
--- /dev/null
+++ b/src/lib/rpc/clnt_tcp.c
@@ -0,0 +1,511 @@
+/* @(#)clnt_tcp.c	2.2 88/08/01 4.0 RPCSRC */
+/*
+ * Copyright (c) 2010, Oracle America, Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *
+ *     * Neither the name of the "Oracle America, Inc." nor the names of
+ *       its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * clnt_tcp.c, Implements a TCP/IP based, client side RPC.
+ *
+ * TCP based RPC supports 'batched calls'.
+ * A sequence of calls may be batched-up in a send buffer.  The rpc call
+ * return immediately to the client even though the call was not necessarily
+ * sent.  The batching occurs if the results' xdr routine is NULL (0) AND
+ * the rpc timeout value is zero (see clnt.h, rpc).
+ *
+ * Clients should NOT casually batch calls that in fact return results; that is,
+ * the server side should be aware that a call is batched and not produce any
+ * return message.  Batched calls that produce many result messages can
+ * deadlock (netlock) the client and the server....
+ *
+ * Now go hang yourself.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <gssrpc/rpc.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <string.h>
+#include <gssrpc/pmap_clnt.h>
+/* FD_ZERO may need memset declaration (e.g., Solaris 9) */
+#include <string.h>
+#include <port-sockets.h>
+
+#define MCALL_MSG_SIZE 24
+
+#ifndef GETSOCKNAME_ARG3_TYPE
+#define GETSOCKNAME_ARG3_TYPE int
+#endif
+
+static enum clnt_stat	clnttcp_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
+				     xdrproc_t, void *, struct timeval);
+static void		clnttcp_abort(CLIENT *);
+static void		clnttcp_geterr(CLIENT *, struct rpc_err *);
+static bool_t		clnttcp_freeres(CLIENT *, xdrproc_t, void *);
+static bool_t           clnttcp_control(CLIENT *, int, void *);
+static void		clnttcp_destroy(CLIENT *);
+
+static struct clnt_ops tcp_ops = {
+	clnttcp_call,
+	clnttcp_abort,
+	clnttcp_geterr,
+	clnttcp_freeres,
+	clnttcp_destroy,
+	clnttcp_control
+};
+
+struct ct_data {
+	int		ct_sock;
+	bool_t		ct_closeit;
+	struct timeval	ct_wait;
+	bool_t          ct_waitset;       /* wait set by clnt_control? */
+	struct sockaddr_in ct_addr;
+	struct rpc_err	ct_error;
+	union {
+	  char		ct_mcall[MCALL_MSG_SIZE];	/* marshalled callmsg */
+	  uint32_t   ct_mcalli;
+	} ct_u;
+	u_int		ct_mpos;			/* pos after marshal */
+	XDR		ct_xdrs;
+};
+
+static int	readtcp(char *, caddr_t, int);
+static int	writetcp(char *, caddr_t, int);
+
+
+/*
+ * Create a client handle for a tcp/ip connection.
+ * If *sockp<0, *sockp is set to a newly created TCP socket and it is
+ * connected to raddr.  If *sockp non-negative then
+ * raddr is ignored.  The rpc/tcp package does buffering
+ * similar to stdio, so the client must pick send and receive buffer sizes,];
+ * 0 => use the default.
+ * If raddr->sin_port is 0, then a binder on the remote machine is
+ * consulted for the right port number.
+ * NB: *sockp is copied into a private area.
+ * NB: It is the clients responsibility to close *sockp.
+ * NB: The rpch->cl_auth is set null authentication.  Caller may wish to set this
+ * something more useful.
+ */
+CLIENT *
+clnttcp_create(
+	struct sockaddr_in *raddr,
+	rpcprog_t prog,
+	rpcvers_t vers,
+        SOCKET *sockp,
+	u_int sendsz,
+	u_int recvsz)
+{
+	CLIENT *h;
+	register struct ct_data *ct = 0;
+	struct timeval now;
+	struct rpc_msg call_msg;
+
+	h  = (CLIENT *)mem_alloc(sizeof(*h));
+	if (h == NULL) {
+		(void)fprintf(stderr, "clnttcp_create: out of memory\n");
+		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+		rpc_createerr.cf_error.re_errno = errno;
+		goto fooy;
+	}
+	ct = (struct ct_data *)mem_alloc(sizeof(*ct));
+	if (ct == NULL) {
+		(void)fprintf(stderr, "clnttcp_create: out of memory\n");
+		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+		rpc_createerr.cf_error.re_errno = errno;
+		goto fooy;
+	}
+
+	/*
+	 * If no port number given ask the pmap for one
+	 */
+	if (raddr != NULL && raddr->sin_port == 0) {
+		u_short port;
+		if ((port = pmap_getport(raddr, prog, vers, IPPROTO_TCP)) == 0) {
+			mem_free((caddr_t)ct, sizeof(struct ct_data));
+			mem_free((caddr_t)h, sizeof(CLIENT));
+			return ((CLIENT *)NULL);
+		}
+		raddr->sin_port = htons(port);
+	}
+
+	/*
+	 * If no socket given, open one
+	 */
+	if (*sockp < 0) {
+		*sockp = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+		(void)bindresvport_sa(*sockp, NULL);
+		if ((*sockp < 0)
+		    || (connect(*sockp, (struct sockaddr *)raddr,
+		    sizeof(*raddr)) < 0)) {
+			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+			rpc_createerr.cf_error.re_errno = errno;
+                        (void)closesocket(*sockp);
+			goto fooy;
+		}
+		ct->ct_closeit = TRUE;
+	} else {
+		ct->ct_closeit = FALSE;
+	}
+
+	/*
+	 * Set up private data struct
+	 */
+	ct->ct_sock = *sockp;
+	ct->ct_wait.tv_usec = 0;
+	ct->ct_waitset = FALSE;
+	if (raddr == NULL) {
+	    /* Get the remote address from the socket, if it's IPv4. */
+	    struct sockaddr_in sin;
+	    socklen_t len = sizeof(sin);
+	    int ret = getpeername(ct->ct_sock, (struct sockaddr *)&sin, &len);
+	    if (ret == 0 && len == sizeof(sin) && sin.sin_family == AF_INET)
+		ct->ct_addr = sin;
+	    else
+		memset(&ct->ct_addr, 0, sizeof(ct->ct_addr));
+	} else
+	    ct->ct_addr = *raddr;
+
+	/*
+	 * Initialize call message
+	 */
+	(void)gettimeofday(&now, (struct timezone *)0);
+	call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
+	call_msg.rm_direction = CALL;
+	call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
+	call_msg.rm_call.cb_prog = prog;
+	call_msg.rm_call.cb_vers = vers;
+
+	/*
+	 * pre-serialize the staic part of the call msg and stash it away
+	 */
+	xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcall, MCALL_MSG_SIZE,
+	    XDR_ENCODE);
+	if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
+		if (ct->ct_closeit)
+                        (void)closesocket(*sockp);
+		goto fooy;
+	}
+	ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs));
+	XDR_DESTROY(&(ct->ct_xdrs));
+
+	/*
+	 * Create a client handle which uses xdrrec for serialization
+	 * and authnone for authentication.
+	 */
+	xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
+	    (caddr_t)ct, readtcp, writetcp);
+	h->cl_ops = &tcp_ops;
+	h->cl_private = (caddr_t) ct;
+	h->cl_auth = authnone_create();
+	return (h);
+
+fooy:
+	/*
+	 * Something goofed, free stuff and barf
+	 */
+	mem_free((caddr_t)ct, sizeof(struct ct_data));
+	mem_free((caddr_t)h, sizeof(CLIENT));
+	return ((CLIENT *)NULL);
+}
+
+static enum clnt_stat
+clnttcp_call(
+	register CLIENT *h,
+	rpcproc_t proc,
+	xdrproc_t xdr_args,
+	void * args_ptr,
+	xdrproc_t xdr_results,
+	void * results_ptr,
+	struct timeval timeout)
+{
+	register struct ct_data *ct = (struct ct_data *) h->cl_private;
+	register XDR *xdrs = &(ct->ct_xdrs);
+	struct rpc_msg reply_msg;
+	uint32_t x_id;
+	uint32_t *msg_x_id = &ct->ct_u.ct_mcalli;	/* yuk */
+	register bool_t shipnow;
+	int refreshes = 2;
+	long procl = proc;
+
+	if (!ct->ct_waitset) {
+		ct->ct_wait = timeout;
+	}
+
+	shipnow =
+	    (xdr_results == (xdrproc_t)0 && timeout.tv_sec == 0
+	    && timeout.tv_usec == 0) ? FALSE : TRUE;
+
+call_again:
+	xdrs->x_op = XDR_ENCODE;
+	ct->ct_error.re_status = RPC_SUCCESS;
+	x_id = ntohl(--(*msg_x_id));
+	if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcall, ct->ct_mpos)) ||
+	    (! XDR_PUTLONG(xdrs, &procl)) ||
+	    (! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
+	    (! AUTH_WRAP(h->cl_auth, xdrs, xdr_args, args_ptr))) {
+		if (ct->ct_error.re_status == RPC_SUCCESS)
+			ct->ct_error.re_status = RPC_CANTENCODEARGS;
+		(void)xdrrec_endofrecord(xdrs, TRUE);
+		return (ct->ct_error.re_status);
+	}
+	if (! xdrrec_endofrecord(xdrs, shipnow))
+		return (ct->ct_error.re_status = RPC_CANTSEND);
+	if (! shipnow)
+		return (RPC_SUCCESS);
+	/*
+	 * Hack to provide rpc-based message passing
+	 */
+	if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
+		return(ct->ct_error.re_status = RPC_TIMEDOUT);
+	}
+
+
+	/*
+	 * Keep receiving until we get a valid transaction id
+	 */
+	xdrs->x_op = XDR_DECODE;
+	while (TRUE) {
+		reply_msg.acpted_rply.ar_verf = gssrpc__null_auth;
+		reply_msg.acpted_rply.ar_results.where = NULL;
+		reply_msg.acpted_rply.ar_results.proc = xdr_void;
+		if (! xdrrec_skiprecord(xdrs))
+			return (ct->ct_error.re_status);
+		/* now decode and validate the response header */
+		if (! xdr_replymsg(xdrs, &reply_msg)) {
+			/*
+			 * Free some stuff allocated by xdr_replymsg()
+			 * to avoid leaks, since it may allocate
+			 * memory from partially successful decodes.
+			 */
+			enum xdr_op op = xdrs->x_op;
+			xdrs->x_op = XDR_FREE;
+			xdr_replymsg(xdrs, &reply_msg);
+			xdrs->x_op = op;
+			if (ct->ct_error.re_status == RPC_SUCCESS)
+				continue;
+			return (ct->ct_error.re_status);
+		}
+		if (reply_msg.rm_xid == x_id)
+			break;
+	}
+
+	/*
+	 * process header
+	 */
+	gssrpc__seterr_reply(&reply_msg, &(ct->ct_error));
+	if (ct->ct_error.re_status == RPC_SUCCESS) {
+		if (! AUTH_VALIDATE(h->cl_auth, &reply_msg.acpted_rply.ar_verf)) {
+			ct->ct_error.re_status = RPC_AUTHERROR;
+			ct->ct_error.re_why = AUTH_INVALIDRESP;
+		} else if (! AUTH_UNWRAP(h->cl_auth, xdrs,
+					 xdr_results, results_ptr)) {
+			if (ct->ct_error.re_status == RPC_SUCCESS)
+				ct->ct_error.re_status = RPC_CANTDECODERES;
+		}
+	}  /* end successful completion */
+	else {
+		/* maybe our credentials need to be refreshed ... */
+		if (refreshes-- && AUTH_REFRESH(h->cl_auth, &reply_msg))
+			goto call_again;
+	}  /* end of unsuccessful completion */
+	/* free verifier ... */
+	if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
+	    (reply_msg.acpted_rply.ar_verf.oa_base != NULL)) {
+	    xdrs->x_op = XDR_FREE;
+	    (void)xdr_opaque_auth(xdrs, &(reply_msg.acpted_rply.ar_verf));
+	}
+	return (ct->ct_error.re_status);
+}
+
+static void
+clnttcp_geterr(
+	CLIENT *h,
+	struct rpc_err *errp)
+{
+	register struct ct_data *ct =
+	    (struct ct_data *) h->cl_private;
+
+	*errp = ct->ct_error;
+}
+
+static bool_t
+clnttcp_freeres(
+	CLIENT *cl,
+	xdrproc_t xdr_res,
+	void * res_ptr)
+{
+	register struct ct_data *ct = (struct ct_data *)cl->cl_private;
+	register XDR *xdrs = &(ct->ct_xdrs);
+
+	xdrs->x_op = XDR_FREE;
+	return ((*xdr_res)(xdrs, res_ptr));
+}
+
+/*ARGSUSED*/
+static void
+clnttcp_abort(CLIENT *cl)
+{
+}
+
+static bool_t
+clnttcp_control(
+	CLIENT *cl,
+	int request,
+	void *info)
+{
+	register struct ct_data *ct = (struct ct_data *)cl->cl_private;
+	GETSOCKNAME_ARG3_TYPE len;
+
+	switch (request) {
+	case CLSET_TIMEOUT:
+		ct->ct_wait = *(struct timeval *)info;
+		ct->ct_waitset = TRUE;
+		break;
+	case CLGET_TIMEOUT:
+		*(struct timeval *)info = ct->ct_wait;
+		break;
+	case CLGET_SERVER_ADDR:
+		*(struct sockaddr_in *)info = ct->ct_addr;
+		break;
+	case CLGET_LOCAL_ADDR:
+		len = sizeof(struct sockaddr);
+		if (getsockname(ct->ct_sock, (struct sockaddr*)info, &len) < 0)
+		     return FALSE;
+		else
+		     return TRUE;
+	default:
+		return (FALSE);
+	}
+	return (TRUE);
+}
+
+
+static void
+clnttcp_destroy(CLIENT *h)
+{
+	register struct ct_data *ct =
+	    (struct ct_data *) h->cl_private;
+
+	if (ct->ct_closeit)
+                (void)closesocket(ct->ct_sock);
+	XDR_DESTROY(&(ct->ct_xdrs));
+	mem_free((caddr_t)ct, sizeof(struct ct_data));
+	mem_free((caddr_t)h, sizeof(CLIENT));
+}
+
+/*
+ * Interface between xdr serializer and tcp connection.
+ * Behaves like the system calls, read & write, but keeps some error state
+ * around for the rpc level.
+ */
+static int
+readtcp(
+        char *ctptr,
+	caddr_t buf,
+	register int len)
+{
+  register struct ct_data *ct = (struct ct_data *)(void *)ctptr;
+  struct timeval tout;
+#ifdef FD_SETSIZE
+	fd_set mask;
+	fd_set readfds;
+
+	if (len == 0)
+		return (0);
+	FD_ZERO(&mask);
+	FD_SET(ct->ct_sock, &mask);
+#else
+	register int mask = 1 << (ct->ct_sock);
+	int readfds;
+
+	if (len == 0)
+		return (0);
+
+#endif /* def FD_SETSIZE */
+	while (TRUE) {
+		readfds = mask;
+		tout = ct->ct_wait;
+		switch (select(gssrpc__rpc_dtablesize(), &readfds, (fd_set*)NULL, (fd_set*)NULL,
+			       &tout)) {
+		case 0:
+			ct->ct_error.re_status = RPC_TIMEDOUT;
+			return (-1);
+
+		case -1:
+			if (errno == EINTR)
+				continue;
+			ct->ct_error.re_status = RPC_CANTRECV;
+			ct->ct_error.re_errno = errno;
+			return (-1);
+		}
+		break;
+	}
+	switch (len = read(ct->ct_sock, buf, (size_t) len)) {
+
+	case 0:
+		/* premature eof */
+		ct->ct_error.re_errno = ECONNRESET;
+		ct->ct_error.re_status = RPC_CANTRECV;
+		len = -1;  /* it's really an error */
+		break;
+
+	case -1:
+		ct->ct_error.re_errno = errno;
+		ct->ct_error.re_status = RPC_CANTRECV;
+		break;
+	}
+	return (len);
+}
+
+static int
+writetcp(
+        char *ctptr,
+	caddr_t buf,
+	int len)
+{
+	struct ct_data *ct = (struct ct_data *)(void *)ctptr;
+	register int i, cnt;
+
+	for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+		if ((i = write(ct->ct_sock, buf, (size_t) cnt)) == -1) {
+			ct->ct_error.re_errno = errno;
+			ct->ct_error.re_status = RPC_CANTSEND;
+			return (-1);
+		}
+	}
+	return (len);
+}