vendor/krb5/1.15.1

1 files changed, 536 insertions, 0 deletions

diff --git a/src/lib/rpc/svc_tcp.c b/src/lib/rpc/svc_tcp.c
new file mode 100644
index 000000000000..d78cf55a7419
--- /dev/null
+++ b/src/lib/rpc/svc_tcp.c
@@ -0,0 +1,536 @@
+/* @(#)svc_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[] = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * svc_tcp.c, Server side for TCP/IP based RPC.
+ *
+ * Actually implements two flavors of transporter -
+ * a tcp rendezvouser (a listner and connection establisher)
+ * and a record/tcp stream.
+ */
+
+#include "k5-platform.h"
+#include <unistd.h>
+#include <gssrpc/rpc.h>
+#include <sys/socket.h>
+#include <port-sockets.h>
+#include <socket-utils.h>
+/*extern bool_t abort();
+extern errno;
+*/
+
+#ifndef FD_SETSIZE
+#ifdef NBBY
+#define NOFILE (sizeof(int) * NBBY)
+#else
+#define NOFILE (sizeof(int) * 8)
+#endif
+#endif
+
+/*
+ * Ops vector for TCP/IP based rpc service handle
+ */
+static bool_t		svctcp_recv(SVCXPRT *, struct rpc_msg *);
+static enum xprt_stat	svctcp_stat(SVCXPRT *);
+static bool_t		svctcp_getargs(SVCXPRT *, xdrproc_t, void *);
+static bool_t		svctcp_reply(SVCXPRT *, struct rpc_msg *);
+static bool_t		svctcp_freeargs(SVCXPRT *, xdrproc_t, void *);
+static void		svctcp_destroy(SVCXPRT *);
+
+static struct xp_ops svctcp_op = {
+	svctcp_recv,
+	svctcp_stat,
+	svctcp_getargs,
+	svctcp_reply,
+	svctcp_freeargs,
+	svctcp_destroy
+};
+
+/*
+ * Ops vector for TCP/IP rendezvous handler
+ */
+static bool_t		rendezvous_request(SVCXPRT *, struct rpc_msg *);
+static bool_t		abortx(void);
+static bool_t		abortx_getargs(SVCXPRT *, xdrproc_t, void *);
+static bool_t		abortx_reply(SVCXPRT *, struct rpc_msg *);
+static bool_t		abortx_freeargs(SVCXPRT *, xdrproc_t, void *);
+static enum xprt_stat	rendezvous_stat(SVCXPRT *);
+
+static struct xp_ops svctcp_rendezvous_op = {
+	rendezvous_request,
+	rendezvous_stat,
+	abortx_getargs,
+	abortx_reply,
+	abortx_freeargs,
+	svctcp_destroy
+};
+
+static int readtcp(char *, caddr_t, int), writetcp(char *, caddr_t, int);
+static SVCXPRT *makefd_xprt(int, u_int, u_int);
+
+struct tcp_rendezvous { /* kept in xprt->xp_p1 */
+	u_int sendsize;
+	u_int recvsize;
+};
+
+struct tcp_conn {  /* kept in xprt->xp_p1 */
+	enum xprt_stat strm_stat;
+	uint32_t x_id;
+	XDR xdrs;
+	char verf_body[MAX_AUTH_BYTES];
+};
+
+/*
+ * Usage:
+ *	xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
+ *
+ * Creates, registers, and returns a (rpc) tcp based transporter.
+ * Once *xprt is initialized, it is registered as a transporter
+ * see (svc.h, xprt_register).  This routine returns
+ * a NULL if a problem occurred.
+ *
+ * If sock<0 then a socket is created, else sock is used.
+ * If the socket, sock is not bound to a port then svctcp_create
+ * binds it to an arbitrary port.  The routine then starts a tcp
+ * listener on the socket's associated port.  In any (successful) case,
+ * xprt->xp_sock is the registered socket number and xprt->xp_port is the
+ * associated port number.
+ *
+ * Since tcp streams do buffered io similar to stdio, the caller can specify
+ * how big the send and receive buffers are via the second and third parms;
+ * 0 => use the system default.
+ */
+SVCXPRT *
+svctcp_create(
+        SOCKET sock,
+	u_int sendsize,
+	u_int recvsize)
+{
+	bool_t madesock = FALSE;
+	register SVCXPRT *xprt;
+	register struct tcp_rendezvous *r;
+	struct sockaddr_storage ss;
+	struct sockaddr *sa = (struct sockaddr *)&ss;
+	socklen_t len;
+
+	if (sock == RPC_ANYSOCK) {
+		if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+			perror("svctcp_.c - udp socket creation problem");
+			return ((SVCXPRT *)NULL);
+		}
+		set_cloexec_fd(sock);
+		madesock = TRUE;
+		memset(&ss, 0, sizeof(ss));
+		sa->sa_family = AF_INET;
+	} else {
+		len = sizeof(struct sockaddr_storage);
+		if (getsockname(sock, sa, &len) != 0) {
+			perror("svc_tcp.c - cannot getsockname");
+			return ((SVCXPRT *)NULL);
+		}
+	}
+
+	if (bindresvport_sa(sock, sa)) {
+		sa_setport(sa, 0);
+		(void)bind(sock, sa, sa_socklen(sa));
+	}
+	len = sizeof(struct sockaddr_storage);
+	if (getsockname(sock, sa, &len) != 0) {
+		perror("svc_tcp.c - cannot getsockname");
+                if (madesock)
+                        (void)closesocket(sock);
+		return ((SVCXPRT *)NULL);
+	}
+	if (listen(sock, 2) != 0) {
+		perror("svctcp_.c - cannot listen");
+                if (madesock)
+                        (void)closesocket(sock);
+		return ((SVCXPRT *)NULL);
+	}
+	r = (struct tcp_rendezvous *)mem_alloc(sizeof(*r));
+	if (r == NULL) {
+		(void) fprintf(stderr, "svctcp_create: out of memory\n");
+		return (NULL);
+	}
+	r->sendsize = sendsize;
+	r->recvsize = recvsize;
+	xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
+	if (xprt == NULL) {
+		(void) fprintf(stderr, "svctcp_create: out of memory\n");
+		return (NULL);
+	}
+	xprt->xp_p2 = NULL;
+	xprt->xp_p1 = (caddr_t)r;
+	xprt->xp_auth = NULL;
+	xprt->xp_verf = gssrpc__null_auth;
+	xprt->xp_ops = &svctcp_rendezvous_op;
+	xprt->xp_port = sa_getport(sa);
+	xprt->xp_sock = sock;
+	xprt->xp_laddrlen = 0;
+	xprt_register(xprt);
+	return (xprt);
+}
+
+/*
+ * Like svtcp_create(), except the routine takes any *open* UNIX file
+ * descriptor as its first input.
+ */
+SVCXPRT *
+svcfd_create(
+	int fd,
+	u_int sendsize,
+	u_int recvsize)
+{
+
+	return (makefd_xprt(fd, sendsize, recvsize));
+}
+
+static SVCXPRT *
+makefd_xprt(
+	int fd,
+	u_int sendsize,
+	u_int recvsize)
+{
+	register SVCXPRT *xprt;
+	register struct tcp_conn *cd;
+
+#ifdef FD_SETSIZE
+	if (fd >= FD_SETSIZE) {
+		(void) fprintf(stderr, "svc_tcp: makefd_xprt: fd too high\n");
+		xprt = NULL;
+		goto done;
+	}
+#else
+	if (fd >= NOFILE) {
+		(void) fprintf(stderr, "svc_tcp: makefd_xprt: fd too high\n");
+		xprt = NULL;
+		goto done;
+	}
+#endif
+	xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
+	if (xprt == (SVCXPRT *)NULL) {
+		(void) fprintf(stderr, "svc_tcp: makefd_xprt: out of memory\n");
+		goto done;
+	}
+	cd = (struct tcp_conn *)mem_alloc(sizeof(struct tcp_conn));
+	if (cd == (struct tcp_conn *)NULL) {
+		(void) fprintf(stderr, "svc_tcp: makefd_xprt: out of memory\n");
+		mem_free((char *) xprt, sizeof(SVCXPRT));
+		xprt = (SVCXPRT *)NULL;
+		goto done;
+	}
+	cd->strm_stat = XPRT_IDLE;
+	xdrrec_create(&(cd->xdrs), sendsize, recvsize,
+	    (caddr_t)xprt, readtcp, writetcp);
+	xprt->xp_p2 = NULL;
+	xprt->xp_p1 = (caddr_t)cd;
+	xprt->xp_auth = NULL;
+	xprt->xp_verf.oa_base = cd->verf_body;
+	xprt->xp_addrlen = 0;
+	xprt->xp_laddrlen = 0;
+	xprt->xp_ops = &svctcp_op;  /* truely deals with calls */
+	xprt->xp_port = 0;  /* this is a connection, not a rendezvouser */
+	xprt->xp_sock = fd;
+	xprt_register(xprt);
+    done:
+	return (xprt);
+}
+
+static bool_t
+rendezvous_request(
+	register SVCXPRT *xprt,
+	struct rpc_msg *msg)
+{
+        SOCKET sock;
+	struct tcp_rendezvous *r;
+	struct sockaddr_in addr, laddr;
+	socklen_t len, llen;
+
+	r = (struct tcp_rendezvous *)xprt->xp_p1;
+    again:
+	len = llen = sizeof(struct sockaddr_in);
+	if ((sock = accept(xprt->xp_sock, (struct sockaddr *)&addr,
+	    &len)) < 0) {
+		if (errno == EINTR)
+			goto again;
+	       return (FALSE);
+	}
+	set_cloexec_fd(sock);
+	if (getsockname(sock, (struct sockaddr *) &laddr, &llen) < 0)
+	     return (FALSE);
+
+	/*
+	 * make a new transporter (re-uses xprt)
+	 */
+	xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
+	if (xprt == NULL) {
+                (void)closesocket(sock);
+		return (FALSE);
+	}
+	xprt->xp_raddr = addr;
+	xprt->xp_addrlen = len;
+	xprt->xp_laddr = laddr;
+	xprt->xp_laddrlen = llen;
+	return (FALSE); /* there is never an rpc msg to be processed */
+}
+
+static enum xprt_stat
+rendezvous_stat(register SVCXPRT *xprt)
+{
+
+	return (XPRT_IDLE);
+}
+
+static void
+svctcp_destroy(register SVCXPRT *xprt)
+{
+	register struct tcp_conn *cd = (struct tcp_conn *)xprt->xp_p1;
+
+	xprt_unregister(xprt);
+        (void)closesocket(xprt->xp_sock);
+	if (xprt->xp_port != 0) {
+		/* a rendezvouser socket */
+		xprt->xp_port = 0;
+	} else {
+		/* an actual connection socket */
+		XDR_DESTROY(&(cd->xdrs));
+	}
+	if (xprt->xp_auth != NULL) {
+		SVCAUTH_DESTROY(xprt->xp_auth);
+		xprt->xp_auth = NULL;
+	}
+	mem_free((caddr_t)cd, sizeof(struct tcp_conn));
+	mem_free((caddr_t)xprt, sizeof(SVCXPRT));
+}
+
+/*
+ * All read operations timeout after 35 seconds.
+ * A timeout is fatal for the connection.
+ */
+static struct timeval wait_per_try = { 35, 0 };
+
+/*
+ * reads data from the tcp conection.
+ * any error is fatal and the connection is closed.
+ * (And a read of zero bytes is a half closed stream => error.)
+ */
+static int
+readtcp(
+        char *xprtptr,
+	caddr_t buf,
+	register int len)
+{
+	register SVCXPRT *xprt = (SVCXPRT *)(void *)xprtptr;
+	register int sock = xprt->xp_sock;
+	struct timeval tout;
+#ifdef FD_SETSIZE
+	fd_set mask;
+	fd_set readfds;
+
+	FD_ZERO(&mask);
+	FD_SET(sock, &mask);
+#else
+	register int mask = 1 << sock;
+	int readfds;
+#endif /* def FD_SETSIZE */
+#ifdef FD_SETSIZE
+#define loopcond (!FD_ISSET(sock, &readfds))
+#else
+#define loopcond (readfds != mask)
+#endif
+	do {
+		readfds = mask;
+		tout = wait_per_try;
+		if (select(sock + 1, &readfds, (fd_set*)NULL,
+			   (fd_set*)NULL, &tout) <= 0) {
+			if (errno == EINTR) {
+				continue;
+			}
+			goto fatal_err;
+		}
+	} while (loopcond);
+	if ((len = read(sock, buf, (size_t) len)) > 0) {
+		return (len);
+	}
+fatal_err:
+	((struct tcp_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
+	return (-1);
+}
+
+/*
+ * writes data to the tcp connection.
+ * Any error is fatal and the connection is closed.
+ */
+static int
+writetcp(
+	char *xprtptr,
+	caddr_t buf,
+	int len)
+{
+	register SVCXPRT *xprt = (SVCXPRT *)(void *) xprtptr;
+	register int i, cnt;
+
+	for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+		if ((i = write(xprt->xp_sock, buf, (size_t) cnt)) < 0) {
+			((struct tcp_conn *)(xprt->xp_p1))->strm_stat =
+			    XPRT_DIED;
+			return (-1);
+		}
+	}
+	return (len);
+}
+
+static enum xprt_stat
+svctcp_stat(SVCXPRT *xprt)
+{
+	register struct tcp_conn *cd =
+	    (struct tcp_conn *)(xprt->xp_p1);
+
+	if (cd->strm_stat == XPRT_DIED)
+		return (XPRT_DIED);
+	if (! xdrrec_eof(&(cd->xdrs)))
+		return (XPRT_MOREREQS);
+	return (XPRT_IDLE);
+}
+
+static bool_t
+svctcp_recv(
+	SVCXPRT *xprt,
+	register struct rpc_msg *msg)
+{
+	register struct tcp_conn *cd =
+	    (struct tcp_conn *)(xprt->xp_p1);
+	register XDR *xdrs = &(cd->xdrs);
+
+	xdrs->x_op = XDR_DECODE;
+	(void)xdrrec_skiprecord(xdrs);
+	if (xdr_callmsg(xdrs, msg)) {
+		cd->x_id = msg->rm_xid;
+		return (TRUE);
+	}
+	return (FALSE);
+}
+
+static bool_t
+svctcp_getargs(
+	SVCXPRT *xprt,
+	xdrproc_t xdr_args,
+	void *args_ptr)
+{
+	if (! SVCAUTH_UNWRAP(xprt->xp_auth,
+			     &(((struct tcp_conn *)(xprt->xp_p1))->xdrs),
+			     xdr_args, args_ptr)) {
+		(void)svctcp_freeargs(xprt, xdr_args, args_ptr);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+static bool_t
+svctcp_freeargs(
+	SVCXPRT *xprt,
+	xdrproc_t xdr_args,
+	void * args_ptr)
+{
+	register XDR *xdrs =
+	    &(((struct tcp_conn *)(xprt->xp_p1))->xdrs);
+
+	xdrs->x_op = XDR_FREE;
+	return ((*xdr_args)(xdrs, args_ptr));
+}
+
+static bool_t svctcp_reply(
+	SVCXPRT *xprt,
+	register struct rpc_msg *msg)
+{
+	register struct tcp_conn *cd =
+		(struct tcp_conn *)(xprt->xp_p1);
+	register XDR *xdrs = &(cd->xdrs);
+	register bool_t stat;
+
+	xdrproc_t xdr_results = NULL;
+	caddr_t xdr_location = 0;
+	bool_t has_args;
+
+	if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
+	    msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
+		has_args = TRUE;
+		xdr_results = msg->acpted_rply.ar_results.proc;
+		xdr_location = msg->acpted_rply.ar_results.where;
+
+		msg->acpted_rply.ar_results.proc = xdr_void;
+		msg->acpted_rply.ar_results.where = NULL;
+	} else
+		has_args = FALSE;
+
+	xdrs->x_op = XDR_ENCODE;
+	msg->rm_xid = cd->x_id;
+	stat = FALSE;
+	if (xdr_replymsg(xdrs, msg) &&
+	    (!has_args ||
+	     (SVCAUTH_WRAP(xprt->xp_auth, xdrs, xdr_results, xdr_location)))) {
+		stat = TRUE;
+	}
+	(void)xdrrec_endofrecord(xdrs, TRUE);
+	return (stat);
+}
+
+static bool_t abortx(void)
+{
+	abort();
+	return 1;
+}
+
+static bool_t abortx_getargs(
+	SVCXPRT *xprt,
+	xdrproc_t proc,
+	void *info)
+{
+	return abortx();
+}
+
+static bool_t abortx_reply(SVCXPRT *xprt, struct rpc_msg *msg)
+{
+	return abortx();
+}
+
+static bool_t abortx_freeargs(
+	SVCXPRT *xprt, xdrproc_t proc,
+	void * info)
+{
+	return abortx();
+}