OpenSolaris Launch

1 files changed, 447 insertions, 0 deletions

diff --git a/usr/src/ucblib/librpcsoc/svc_tcp.c b/usr/src/ucblib/librpcsoc/svc_tcp.c
new file mode 100644
index 0000000000..387eb49487
--- /dev/null
+++ b/usr/src/ucblib/librpcsoc/svc_tcp.c
@@ -0,0 +1,447 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * 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 <rpc/rpc.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <syslog.h>
+#include <malloc.h>
+#include <stdio.h>
+
+extern bool_t abort();
+extern int errno;
+extern SVCXPRT *svc_xprt_alloc();
+extern void svc_xprt_free();
+extern int _socket(int, int, int);
+extern int _bind(int, const struct sockaddr *, int);
+extern int _getsockname(int, struct sockaddr *, int *);
+extern int _listen(int, int);
+extern int _accept(int, struct sockaddr *, int *);
+extern int bindresvport(int, struct sockaddr_in *);
+
+static struct xp_ops *svctcp_ops();
+static struct xp_ops *svctcp_rendezvous_ops();
+
+static int readtcp(), writetcp();
+static SVCXPRT *makefd_xprt();
+
+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(sock, sendsize, recvsize)
+	register int sock;
+	u_int sendsize;
+	u_int recvsize;
+{
+	bool_t madesock = FALSE;
+	register SVCXPRT *xprt;
+	register struct tcp_rendezvous *r;
+	struct sockaddr_in addr;
+	int len = sizeof (struct sockaddr_in);
+
+	if (sock == RPC_ANYSOCK) {
+		if ((sock = _socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+			(void) syslog(LOG_ERR, "svctcp_create - tcp",
+				" socket creation problem: %m");
+			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) ||
+	    (_listen(sock, 2) != 0)) {
+		(void) syslog(LOG_ERR, "svctcp_create - cannot",
+			" getsockname or listen: %m");
+		if (madesock)
+			(void) close(sock);
+		return ((SVCXPRT *)NULL);
+	}
+	r = (struct tcp_rendezvous *)mem_alloc(sizeof (*r));
+	if (r == NULL) {
+		(void) syslog(LOG_ERR, "svctcp_create: out of memory");
+		if (madesock)
+			(void) close(sock);
+		return (NULL);
+	}
+	r->sendsize = sendsize;
+	r->recvsize = recvsize;
+	xprt = svc_xprt_alloc();
+	if (xprt == NULL) {
+		(void) syslog(LOG_ERR, "svctcp_create: out of memory");
+		mem_free((char *) r, sizeof (*r));
+		if (madesock)
+			(void) close(sock);
+		return (NULL);
+	}
+	xprt->xp_p2 = NULL;
+	xprt->xp_netid = NULL;
+	xprt->xp_p1 = (caddr_t)r;
+	xprt->xp_verf = _null_auth;
+	xprt->xp_ops = svctcp_rendezvous_ops();
+	xprt->xp_port = ntohs(addr.sin_port);
+	xprt->xp_sock = sock;
+	xprt->xp_rtaddr.buf = xprt->xp_raddr;
+	xprt_register(xprt);
+	return (xprt);
+}
+
+/*
+ * Like svtcp_create(), except the routine takes any *open* UNIX file
+ * descriptor as its first input.
+ */
+SVCXPRT *
+svcfd_create(fd, sendsize, recvsize)
+	int fd;
+	u_int sendsize;
+	u_int recvsize;
+{
+
+	return (makefd_xprt(fd, sendsize, recvsize));
+}
+
+static SVCXPRT *
+makefd_xprt(fd, sendsize, recvsize)
+	int fd;
+	u_int sendsize;
+	u_int recvsize;
+{
+	register SVCXPRT *xprt;
+	register struct tcp_conn *cd;
+
+	xprt = svc_xprt_alloc();
+	if (xprt == (SVCXPRT *)NULL) {
+		(void) syslog(LOG_ERR, "svc_tcp: makefd_xprt: out of memory");
+		goto done;
+	}
+	cd = (struct tcp_conn *)mem_alloc(sizeof (struct tcp_conn));
+	if (cd == (struct tcp_conn *)NULL) {
+		(void) syslog(LOG_ERR, "svc_tcp: makefd_xprt: out of memory");
+		svc_xprt_free(xprt);
+		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_netid = NULL;
+	xprt->xp_p1 = (caddr_t)cd;
+	xprt->xp_verf.oa_base = cd->verf_body;
+	xprt->xp_addrlen = 0;
+	xprt->xp_ops = svctcp_ops();  /* truely deals with calls */
+	xprt->xp_port = 0;  /* this is a connection, not a rendezvouser */
+	xprt->xp_sock = fd;
+	/* to handle svc_getcaller() properly */
+	xprt->xp_rtaddr.buf = xprt->xp_raddr;
+	xprt_register(xprt);
+	done:
+	return (xprt);
+}
+
+static bool_t
+rendezvous_request(xprt, rpc_msg)
+	register SVCXPRT *xprt;
+	struct rpc_msg	*rpc_msg;
+{
+	int sock;
+	struct tcp_rendezvous *r;
+	struct sockaddr_in addr;
+	int len;
+
+	r = (struct tcp_rendezvous *)xprt->xp_p1;
+	again:
+	len = sizeof (struct sockaddr_in);
+	if ((sock = _accept(xprt->xp_sock, (struct sockaddr *)&addr,
+	    &len)) < 0) {
+		if (errno == EINTR)
+			goto again;
+		return (FALSE);
+	}
+	/*
+	 * make a new transporter (re-uses xprt)
+	 */
+	xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
+
+	memcpy((char *)&xprt->xp_raddr, (char *)&addr, len);
+	xprt->xp_addrlen = len;
+	return (FALSE); /* there is never an rpc msg to be processed */
+}
+
+static enum xprt_stat
+rendezvous_stat(xprt)
+	SVCXPRT *xprt;
+{
+
+	return (XPRT_IDLE);
+}
+
+static void
+svctcp_destroy(xprt)
+	register SVCXPRT *xprt;
+{
+	register struct tcp_conn *cd = (struct tcp_conn *)xprt->xp_p1;
+
+	xprt_unregister(xprt);
+	(void) close(xprt->xp_sock);
+	if (xprt->xp_port != 0) {
+		/* a rendezvouser socket */
+		xprt->xp_port = 0;
+	} else {
+		/* an actual connection socket */
+		XDR_DESTROY(&(cd->xdrs));
+	}
+	mem_free((caddr_t)cd, sizeof (struct tcp_conn));
+	svc_xprt_free(xprt);
+}
+
+/*
+ * 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(xprt, buf, len)
+	register SVCXPRT *xprt;
+	caddr_t buf;
+	register int len;
+{
+	register int sock = xprt->xp_sock;
+	fd_set mask;
+	fd_set readfds;
+
+	FD_ZERO(&mask);
+	FD_SET(sock, &mask);
+	do {
+		readfds = mask;
+		if (select(__rpc_dtbsize(), &readfds, NULL, NULL,
+			&wait_per_try) <= 0) {
+			if (errno == EINTR) {
+				continue;
+			}
+			goto fatal_err;
+		}
+	} while (!FD_ISSET(sock, &readfds));
+	if ((len = read(sock, buf, 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(xprt, buf, len)
+	register SVCXPRT *xprt;
+	caddr_t buf;
+	int len;
+{
+	register int i, cnt;
+
+	for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+		if ((i = write(xprt->xp_sock, buf, cnt)) < 0) {
+			((struct tcp_conn *)(xprt->xp_p1))->strm_stat =
+			    XPRT_DIED;
+			return (-1);
+		}
+	}
+	return (len);
+}
+
+static enum xprt_stat
+svctcp_stat(xprt)
+	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(xprt, msg)
+	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(xprt, xdr_args, args_ptr)
+	SVCXPRT *xprt;
+	xdrproc_t xdr_args;
+	caddr_t args_ptr;
+{
+
+	return ((*xdr_args)(&(((struct tcp_conn *)(xprt->xp_p1))->xdrs),
+		args_ptr));
+}
+
+static bool_t
+svctcp_freeargs(xprt, xdr_args, args_ptr)
+	SVCXPRT *xprt;
+	xdrproc_t xdr_args;
+	caddr_t 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(xprt, msg)
+	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;
+
+	xdrs->x_op = XDR_ENCODE;
+	msg->rm_xid = cd->x_id;
+	stat = xdr_replymsg(xdrs, msg);
+	(void) xdrrec_endofrecord(xdrs, TRUE);
+	return (stat);
+}
+
+
+static struct xp_ops *
+svctcp_ops()
+{
+	static struct xp_ops ops;
+
+	if (ops.xp_recv == NULL) {
+		ops.xp_recv = svctcp_recv;
+		ops.xp_stat = svctcp_stat;
+		ops.xp_getargs = svctcp_getargs;
+		ops.xp_reply = svctcp_reply;
+		ops.xp_freeargs = svctcp_freeargs;
+		ops.xp_destroy = svctcp_destroy;
+	}
+	return (&ops);
+}
+
+
+static struct xp_ops *
+svctcp_rendezvous_ops()
+{
+	static struct xp_ops ops;
+
+	if (ops.xp_recv == NULL) {
+		ops.xp_recv = rendezvous_request;
+		ops.xp_stat = rendezvous_stat;
+		ops.xp_getargs = abort;
+		ops.xp_reply = abort;
+		ops.xp_freeargs = abort,
+		ops.xp_destroy = svctcp_destroy;
+	}
+	return (&ops);
+}