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1187 lines
30 KiB
C
1187 lines
30 KiB
C
/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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/*
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* svc_vc.c, Server side for Connection Oriented based RPC.
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*
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* Actually implements two flavors of transporter -
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* a tcp rendezvouser (a listener and connection establisher)
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* and a record/tcp stream.
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*/
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#include "opt_kern_tls.h"
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#include <sys/param.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/ktls.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <net/vnet.h>
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#include <netinet/tcp.h>
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#include <rpc/rpc.h>
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#include <rpc/rpcsec_tls.h>
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#include <rpc/krpc.h>
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#include <rpc/rpc_com.h>
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#include <security/mac/mac_framework.h>
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SYSCTL_NODE(_kern, OID_AUTO, rpc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"RPC");
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SYSCTL_NODE(_kern_rpc, OID_AUTO, tls, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"TLS");
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SYSCTL_NODE(_kern_rpc, OID_AUTO, unenc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"unencrypted");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_rx_msgbytes) = 0;
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SYSCTL_U64(_kern_rpc_unenc, OID_AUTO, rx_msgbytes, CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_rx_msgbytes), 0, "Count of non-TLS rx bytes");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_rx_msgcnt) = 0;
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SYSCTL_U64(_kern_rpc_unenc, OID_AUTO, rx_msgcnt, CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_rx_msgcnt), 0, "Count of non-TLS rx messages");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tx_msgbytes) = 0;
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SYSCTL_U64(_kern_rpc_unenc, OID_AUTO, tx_msgbytes, CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_tx_msgbytes), 0, "Count of non-TLS tx bytes");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tx_msgcnt) = 0;
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SYSCTL_U64(_kern_rpc_unenc, OID_AUTO, tx_msgcnt, CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_tx_msgcnt), 0, "Count of non-TLS tx messages");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tls_alerts) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, alerts,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW, &KRPC_VNET_NAME(svc_vc_tls_alerts), 0,
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"Count of TLS alert messages");
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KRPC_VNET_DEFINE(uint64_t, svc_vc_tls_handshake_failed) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, handshake_failed,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_tls_handshake_failed), 0,
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"Count of TLS failed handshakes");
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KRPC_VNET_DEFINE(uint64_t, svc_vc_tls_handshake_success) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, handshake_success,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW,
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&KRPC_VNET_NAME(svc_vc_tls_handshake_success), 0,
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"Count of TLS successful handshakes");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tls_rx_msgbytes) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, rx_msgbytes,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW, &KRPC_VNET_NAME(svc_vc_tls_rx_msgbytes), 0,
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"Count of TLS rx bytes");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tls_rx_msgcnt) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, rx_msgcnt,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW, &KRPC_VNET_NAME(svc_vc_tls_rx_msgcnt), 0,
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"Count of TLS rx messages");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tls_tx_msgbytes) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, tx_msgbytes,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW, &KRPC_VNET_NAME(svc_vc_tls_tx_msgbytes), 0,
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"Count of TLS tx bytes");
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KRPC_VNET_DEFINE_STATIC(uint64_t, svc_vc_tls_tx_msgcnt) = 0;
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SYSCTL_U64(_kern_rpc_tls, OID_AUTO, tx_msgcnt,
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CTLFLAG_KRPC_VNET | CTLFLAG_RW, &KRPC_VNET_NAME(svc_vc_tls_tx_msgcnt), 0,
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"Count of TLS tx messages");
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static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *);
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static void svc_vc_rendezvous_destroy(SVCXPRT *);
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static bool_t svc_vc_null(void);
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static void svc_vc_destroy(SVCXPRT *);
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static enum xprt_stat svc_vc_stat(SVCXPRT *);
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static bool_t svc_vc_ack(SVCXPRT *, uint32_t *);
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static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *, uint32_t *seq);
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static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
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static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
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void *in);
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static void svc_vc_backchannel_destroy(SVCXPRT *);
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static enum xprt_stat svc_vc_backchannel_stat(SVCXPRT *);
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static bool_t svc_vc_backchannel_recv(SVCXPRT *, struct rpc_msg *,
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struct sockaddr **, struct mbuf **);
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static bool_t svc_vc_backchannel_reply(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *, uint32_t *);
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static bool_t svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq,
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void *in);
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static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so,
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struct sockaddr *raddr);
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static int svc_vc_accept(struct socket *head, struct socket **sop);
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static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag);
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static int svc_vc_rendezvous_soupcall(struct socket *, void *, int);
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static const struct xp_ops svc_vc_rendezvous_ops = {
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.xp_recv = svc_vc_rendezvous_recv,
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.xp_stat = svc_vc_rendezvous_stat,
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.xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *,
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struct sockaddr *, struct mbuf *, uint32_t *))svc_vc_null,
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.xp_destroy = svc_vc_rendezvous_destroy,
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.xp_control = svc_vc_rendezvous_control
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};
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static const struct xp_ops svc_vc_ops = {
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.xp_recv = svc_vc_recv,
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.xp_stat = svc_vc_stat,
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.xp_ack = svc_vc_ack,
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.xp_reply = svc_vc_reply,
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.xp_destroy = svc_vc_destroy,
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.xp_control = svc_vc_control
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};
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static const struct xp_ops svc_vc_backchannel_ops = {
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.xp_recv = svc_vc_backchannel_recv,
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.xp_stat = svc_vc_backchannel_stat,
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.xp_reply = svc_vc_backchannel_reply,
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.xp_destroy = svc_vc_backchannel_destroy,
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.xp_control = svc_vc_backchannel_control
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};
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/*
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* Usage:
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* xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
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*
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* Creates, registers, and returns a (rpc) tcp based transporter.
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* Once *xprt is initialized, it is registered as a transporter
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* see (svc.h, xprt_register). This routine returns
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* a NULL if a problem occurred.
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*
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* The filedescriptor passed in is expected to refer to a bound, but
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* not yet connected socket.
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*
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* Since streams do buffered io similar to stdio, the caller can specify
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* how big the send and receive buffers are via the second and third parms;
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* 0 => use the system default.
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*/
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SVCXPRT *
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svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
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size_t recvsize)
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{
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SVCXPRT *xprt;
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int error;
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SOCK_LOCK(so);
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if (so->so_state & (SS_ISCONNECTED|SS_ISDISCONNECTED)) {
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struct sockaddr_storage ss = { .ss_len = sizeof(ss) };
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SOCK_UNLOCK(so);
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error = sopeeraddr(so, (struct sockaddr *)&ss);
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if (error)
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return (NULL);
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xprt = svc_vc_create_conn(pool, so, (struct sockaddr *)&ss);
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return (xprt);
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}
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SOCK_UNLOCK(so);
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = so;
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xprt->xp_p1 = NULL;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_rendezvous_ops;
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xprt->xp_ltaddr.ss_len = sizeof(xprt->xp_ltaddr);
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error = sosockaddr(so, (struct sockaddr *)&xprt->xp_ltaddr);
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if (error) {
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goto cleanup_svc_vc_create;
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}
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xprt_register(xprt);
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solisten(so, -1, curthread);
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SOLISTEN_LOCK(so);
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xprt->xp_upcallset = 1;
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solisten_upcall_set(so, svc_vc_rendezvous_soupcall, xprt);
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SOLISTEN_UNLOCK(so);
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return (xprt);
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cleanup_svc_vc_create:
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sx_destroy(&xprt->xp_lock);
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svc_xprt_free(xprt);
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return (NULL);
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}
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/*
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* Create a new transport for a socket optained via soaccept().
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*/
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SVCXPRT *
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svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
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{
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SVCXPRT *xprt;
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struct cf_conn *cd;
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struct sockopt opt;
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int one = 1;
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int error;
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bzero(&opt, sizeof(struct sockopt));
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opt.sopt_dir = SOPT_SET;
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opt.sopt_level = SOL_SOCKET;
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opt.sopt_name = SO_KEEPALIVE;
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opt.sopt_val = &one;
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opt.sopt_valsize = sizeof(one);
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error = sosetopt(so, &opt);
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if (error) {
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return (NULL);
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}
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if (so->so_proto->pr_protocol == IPPROTO_TCP) {
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bzero(&opt, sizeof(struct sockopt));
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opt.sopt_dir = SOPT_SET;
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opt.sopt_level = IPPROTO_TCP;
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opt.sopt_name = TCP_NODELAY;
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opt.sopt_val = &one;
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opt.sopt_valsize = sizeof(one);
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error = sosetopt(so, &opt);
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if (error) {
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return (NULL);
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}
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}
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cd = mem_alloc(sizeof(*cd));
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cd->strm_stat = XPRT_IDLE;
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = so;
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xprt->xp_p1 = cd;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_ops;
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/*
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* See http://www.connectathon.org/talks96/nfstcp.pdf - client
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* has a 5 minute timer, server has a 6 minute timer.
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*/
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xprt->xp_idletimeout = 6 * 60;
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memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len);
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xprt->xp_ltaddr.ss_len = sizeof(xprt->xp_ltaddr);
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error = sosockaddr(so, (struct sockaddr *)&xprt->xp_ltaddr);
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if (error)
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goto cleanup_svc_vc_create;
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xprt_register(xprt);
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SOCK_RECVBUF_LOCK(so);
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xprt->xp_upcallset = 1;
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soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
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SOCK_RECVBUF_UNLOCK(so);
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/*
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* Throw the transport into the active list in case it already
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* has some data buffered.
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*/
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sx_xlock(&xprt->xp_lock);
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xprt_active(xprt);
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sx_xunlock(&xprt->xp_lock);
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return (xprt);
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cleanup_svc_vc_create:
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sx_destroy(&xprt->xp_lock);
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svc_xprt_free(xprt);
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mem_free(cd, sizeof(*cd));
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return (NULL);
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}
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/*
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* Create a new transport for a backchannel on a clnt_vc socket.
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*/
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SVCXPRT *
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svc_vc_create_backchannel(SVCPOOL *pool)
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{
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SVCXPRT *xprt = NULL;
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struct cf_conn *cd = NULL;
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cd = mem_alloc(sizeof(*cd));
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cd->strm_stat = XPRT_IDLE;
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xprt = svc_xprt_alloc();
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sx_init(&xprt->xp_lock, "xprt->xp_lock");
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xprt->xp_pool = pool;
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xprt->xp_socket = NULL;
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xprt->xp_p1 = cd;
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xprt->xp_p2 = NULL;
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xprt->xp_ops = &svc_vc_backchannel_ops;
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return (xprt);
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}
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/*
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* This does all of the accept except the final call to soaccept. The
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* caller will call soaccept after dropping its locks (soaccept may
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* call malloc).
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*/
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int
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svc_vc_accept(struct socket *head, struct socket **sop)
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{
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struct socket *so;
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int error = 0;
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short nbio;
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KASSERT(SOLISTENING(head),
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("%s: socket %p is not listening", __func__, head));
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#ifdef MAC
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error = mac_socket_check_accept(curthread->td_ucred, head);
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if (error != 0)
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goto done;
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#endif
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/*
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* XXXGL: we want non-blocking semantics. The socket could be a
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* socket created by kernel as well as socket shared with userland,
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* so we can't be sure about presense of SS_NBIO. We also shall not
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* toggle it on the socket, since that may surprise userland. So we
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* set SS_NBIO only temporarily.
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*/
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SOLISTEN_LOCK(head);
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nbio = head->so_state & SS_NBIO;
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head->so_state |= SS_NBIO;
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error = solisten_dequeue(head, &so, 0);
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head->so_state &= (nbio & ~SS_NBIO);
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if (error)
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goto done;
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so->so_state |= nbio;
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*sop = so;
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/* connection has been removed from the listen queue */
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KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
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done:
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return (error);
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}
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/*ARGSUSED*/
|
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static bool_t
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svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
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struct sockaddr **addrp, struct mbuf **mp)
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{
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struct socket *so = NULL;
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struct sockaddr_storage ss = { .ss_len = sizeof(ss) };
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int error;
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SVCXPRT *new_xprt;
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|
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/*
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* The socket upcall calls xprt_active() which will eventually
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* cause the server to call us here. We attempt to accept a
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* connection from the socket and turn it into a new
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* transport. If the accept fails, we have drained all pending
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* connections so we call xprt_inactive().
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*/
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sx_xlock(&xprt->xp_lock);
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error = svc_vc_accept(xprt->xp_socket, &so);
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if (error == EWOULDBLOCK) {
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/*
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* We must re-test for new connections after taking
|
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* the lock to protect us in the case where a new
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* connection arrives after our call to accept fails
|
|
* with EWOULDBLOCK.
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*/
|
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SOLISTEN_LOCK(xprt->xp_socket);
|
|
if (TAILQ_EMPTY(&xprt->xp_socket->sol_comp))
|
|
xprt_inactive_self(xprt);
|
|
SOLISTEN_UNLOCK(xprt->xp_socket);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (error) {
|
|
SOLISTEN_LOCK(xprt->xp_socket);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
soupcall_clear(xprt->xp_socket, SO_RCV);
|
|
}
|
|
SOLISTEN_UNLOCK(xprt->xp_socket);
|
|
xprt_inactive_self(xprt);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
error = soaccept(so, (struct sockaddr *)&ss);
|
|
|
|
if (error) {
|
|
/*
|
|
* XXX not sure if I need to call sofree or soclose here.
|
|
*/
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* svc_vc_create_conn will call xprt_register - we don't need
|
|
* to do anything with the new connection except derefence it.
|
|
*/
|
|
new_xprt = svc_vc_create_conn(xprt->xp_pool, so,
|
|
(struct sockaddr *)&ss);
|
|
if (!new_xprt) {
|
|
soclose(so);
|
|
} else {
|
|
SVC_RELEASE(new_xprt);
|
|
}
|
|
|
|
return (FALSE); /* there is never an rpc msg to be processed */
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static enum xprt_stat
|
|
svc_vc_rendezvous_stat(SVCXPRT *xprt)
|
|
{
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static void
|
|
svc_vc_destroy_common(SVCXPRT *xprt)
|
|
{
|
|
uint32_t reterr;
|
|
|
|
if (xprt->xp_socket) {
|
|
if ((xprt->xp_tls & (RPCTLS_FLAGS_HANDSHAKE |
|
|
RPCTLS_FLAGS_HANDSHFAIL)) != 0) {
|
|
if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
|
|
/*
|
|
* If the upcall fails, the socket has
|
|
* probably been closed via the rpctlssd
|
|
* daemon having crashed or been
|
|
* restarted, so just ignore returned stat.
|
|
*/
|
|
rpctls_srv_disconnect(xprt->xp_sslsec,
|
|
xprt->xp_sslusec, xprt->xp_sslrefno,
|
|
xprt->xp_sslproc, &reterr);
|
|
}
|
|
/* Must sorele() to get rid of reference. */
|
|
CURVNET_SET(xprt->xp_socket->so_vnet);
|
|
sorele(xprt->xp_socket);
|
|
CURVNET_RESTORE();
|
|
} else
|
|
(void)soclose(xprt->xp_socket);
|
|
}
|
|
|
|
if (xprt->xp_netid)
|
|
(void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
|
|
svc_xprt_free(xprt);
|
|
}
|
|
|
|
static void
|
|
svc_vc_rendezvous_destroy(SVCXPRT *xprt)
|
|
{
|
|
|
|
SOLISTEN_LOCK(xprt->xp_socket);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
solisten_upcall_set(xprt->xp_socket, NULL, NULL);
|
|
}
|
|
SOLISTEN_UNLOCK(xprt->xp_socket);
|
|
|
|
svc_vc_destroy_common(xprt);
|
|
}
|
|
|
|
static void
|
|
svc_vc_destroy(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
|
|
CLIENT *cl = (CLIENT *)xprt->xp_p2;
|
|
|
|
SOCK_RECVBUF_LOCK(xprt->xp_socket);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
if (xprt->xp_socket->so_rcv.sb_upcall != NULL)
|
|
soupcall_clear(xprt->xp_socket, SO_RCV);
|
|
}
|
|
SOCK_RECVBUF_UNLOCK(xprt->xp_socket);
|
|
|
|
if (cl != NULL)
|
|
CLNT_RELEASE(cl);
|
|
|
|
svc_vc_destroy_common(xprt);
|
|
|
|
if (cd->mreq)
|
|
m_freem(cd->mreq);
|
|
if (cd->mpending)
|
|
m_freem(cd->mpending);
|
|
mem_free(cd, sizeof(*cd));
|
|
}
|
|
|
|
static void
|
|
svc_vc_backchannel_destroy(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
|
|
struct mbuf *m, *m2;
|
|
|
|
svc_xprt_free(xprt);
|
|
m = cd->mreq;
|
|
while (m != NULL) {
|
|
m2 = m;
|
|
m = m->m_nextpkt;
|
|
m_freem(m2);
|
|
}
|
|
mem_free(cd, sizeof(*cd));
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static bool_t
|
|
svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
return (FALSE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static enum xprt_stat
|
|
svc_vc_stat(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd;
|
|
|
|
cd = (struct cf_conn *)(xprt->xp_p1);
|
|
|
|
if (cd->strm_stat == XPRT_DIED)
|
|
return (XPRT_DIED);
|
|
|
|
if (cd->mreq != NULL && cd->resid == 0 && cd->eor)
|
|
return (XPRT_MOREREQS);
|
|
|
|
if (soreadable(xprt->xp_socket))
|
|
return (XPRT_MOREREQS);
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_ack(SVCXPRT *xprt, uint32_t *ack)
|
|
{
|
|
|
|
*ack = atomic_load_acq_32(&xprt->xp_snt_cnt);
|
|
*ack -= sbused(&xprt->xp_socket->so_snd);
|
|
return (TRUE);
|
|
}
|
|
|
|
static enum xprt_stat
|
|
svc_vc_backchannel_stat(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd;
|
|
|
|
cd = (struct cf_conn *)(xprt->xp_p1);
|
|
|
|
if (cd->mreq != NULL)
|
|
return (XPRT_MOREREQS);
|
|
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
/*
|
|
* If we have an mbuf chain in cd->mpending, try to parse a record from it,
|
|
* leaving the result in cd->mreq. If we don't have a complete record, leave
|
|
* the partial result in cd->mreq and try to read more from the socket.
|
|
*/
|
|
static int
|
|
svc_vc_process_pending(SVCXPRT *xprt)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
|
|
struct socket *so = xprt->xp_socket;
|
|
struct mbuf *m;
|
|
|
|
/*
|
|
* If cd->resid is non-zero, we have part of the
|
|
* record already, otherwise we are expecting a record
|
|
* marker.
|
|
*/
|
|
if (!cd->resid && cd->mpending) {
|
|
/*
|
|
* See if there is enough data buffered to
|
|
* make up a record marker. Make sure we can
|
|
* handle the case where the record marker is
|
|
* split across more than one mbuf.
|
|
*/
|
|
size_t n = 0;
|
|
uint32_t header;
|
|
|
|
m = cd->mpending;
|
|
while (n < sizeof(uint32_t) && m) {
|
|
n += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
if (n < sizeof(uint32_t)) {
|
|
so->so_rcv.sb_lowat = sizeof(uint32_t) - n;
|
|
return (FALSE);
|
|
}
|
|
m_copydata(cd->mpending, 0, sizeof(header),
|
|
(char *)&header);
|
|
header = ntohl(header);
|
|
cd->eor = (header & 0x80000000) != 0;
|
|
cd->resid = header & 0x7fffffff;
|
|
m_adj(cd->mpending, sizeof(uint32_t));
|
|
}
|
|
|
|
/*
|
|
* Start pulling off mbufs from cd->mpending
|
|
* until we either have a complete record or
|
|
* we run out of data. We use m_split to pull
|
|
* data - it will pull as much as possible and
|
|
* split the last mbuf if necessary.
|
|
*/
|
|
while (cd->mpending && cd->resid) {
|
|
m = cd->mpending;
|
|
if (cd->mpending->m_next
|
|
|| cd->mpending->m_len > cd->resid)
|
|
cd->mpending = m_split(cd->mpending,
|
|
cd->resid, M_WAITOK);
|
|
else
|
|
cd->mpending = NULL;
|
|
if (cd->mreq)
|
|
m_last(cd->mreq)->m_next = m;
|
|
else
|
|
cd->mreq = m;
|
|
while (m) {
|
|
cd->resid -= m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Block receive upcalls if we have more data pending,
|
|
* otherwise report our need.
|
|
*/
|
|
if (cd->mpending)
|
|
so->so_rcv.sb_lowat = INT_MAX;
|
|
else
|
|
so->so_rcv.sb_lowat =
|
|
imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2));
|
|
return (TRUE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr **addrp, struct mbuf **mp)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
|
|
struct uio uio;
|
|
struct mbuf *m, *ctrl;
|
|
struct socket* so = xprt->xp_socket;
|
|
XDR xdrs;
|
|
int error, rcvflag;
|
|
uint32_t reterr, xid_plus_direction[2];
|
|
struct cmsghdr *cmsg;
|
|
struct tls_get_record tgr;
|
|
enum clnt_stat ret;
|
|
|
|
/*
|
|
* Serialise access to the socket and our own record parsing
|
|
* state.
|
|
*/
|
|
sx_xlock(&xprt->xp_lock);
|
|
|
|
for (;;) {
|
|
/* If we have no request ready, check pending queue. */
|
|
while (cd->mpending &&
|
|
(cd->mreq == NULL || cd->resid != 0 || !cd->eor)) {
|
|
if (!svc_vc_process_pending(xprt))
|
|
break;
|
|
}
|
|
|
|
/* Process and return complete request in cd->mreq. */
|
|
if (cd->mreq != NULL && cd->resid == 0 && cd->eor) {
|
|
|
|
/*
|
|
* Now, check for a backchannel reply.
|
|
* The XID is in the first uint32_t of the reply
|
|
* and the message direction is the second one.
|
|
*/
|
|
if ((cd->mreq->m_len >= sizeof(xid_plus_direction) ||
|
|
m_length(cd->mreq, NULL) >=
|
|
sizeof(xid_plus_direction)) &&
|
|
xprt->xp_p2 != NULL) {
|
|
m_copydata(cd->mreq, 0,
|
|
sizeof(xid_plus_direction),
|
|
(char *)xid_plus_direction);
|
|
xid_plus_direction[0] =
|
|
ntohl(xid_plus_direction[0]);
|
|
xid_plus_direction[1] =
|
|
ntohl(xid_plus_direction[1]);
|
|
/* Check message direction. */
|
|
if (xid_plus_direction[1] == REPLY) {
|
|
clnt_bck_svccall(xprt->xp_p2,
|
|
cd->mreq,
|
|
xid_plus_direction[0]);
|
|
cd->mreq = NULL;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
|
|
cd->mreq = NULL;
|
|
|
|
/* Check for next request in a pending queue. */
|
|
svc_vc_process_pending(xprt);
|
|
if (cd->mreq == NULL || cd->resid != 0) {
|
|
SOCK_RECVBUF_LOCK(so);
|
|
if (!soreadable(so))
|
|
xprt_inactive_self(xprt);
|
|
SOCK_RECVBUF_UNLOCK(so);
|
|
}
|
|
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
if (! xdr_callmsg(&xdrs, msg)) {
|
|
XDR_DESTROY(&xdrs);
|
|
return (FALSE);
|
|
}
|
|
|
|
*addrp = NULL;
|
|
*mp = xdrmbuf_getall(&xdrs);
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
/*
|
|
* If receiving is disabled so that a TLS handshake can be
|
|
* done by the rpctlssd daemon, return FALSE here.
|
|
*/
|
|
rcvflag = MSG_DONTWAIT;
|
|
if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0)
|
|
rcvflag |= MSG_TLSAPPDATA;
|
|
tryagain:
|
|
if (xprt->xp_dontrcv) {
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* The socket upcall calls xprt_active() which will eventually
|
|
* cause the server to call us here. We attempt to
|
|
* read as much as possible from the socket and put
|
|
* the result in cd->mpending. If the read fails,
|
|
* we have drained both cd->mpending and the socket so
|
|
* we can call xprt_inactive().
|
|
*/
|
|
uio.uio_resid = 1000000000;
|
|
uio.uio_td = curthread;
|
|
ctrl = m = NULL;
|
|
error = soreceive(so, NULL, &uio, &m, &ctrl, &rcvflag);
|
|
|
|
if (error == EWOULDBLOCK) {
|
|
/*
|
|
* We must re-test for readability after
|
|
* taking the lock to protect us in the case
|
|
* where a new packet arrives on the socket
|
|
* after our call to soreceive fails with
|
|
* EWOULDBLOCK.
|
|
*/
|
|
SOCK_RECVBUF_LOCK(so);
|
|
if (!soreadable(so))
|
|
xprt_inactive_self(xprt);
|
|
SOCK_RECVBUF_UNLOCK(so);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* A return of ENXIO indicates that there is an
|
|
* alert record at the head of the
|
|
* socket's receive queue, for TLS connections.
|
|
* This record needs to be handled in userland
|
|
* via an SSL_read() call, so do an upcall to the daemon.
|
|
*/
|
|
KRPC_CURVNET_SET(so->so_vnet);
|
|
if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0 &&
|
|
error == ENXIO) {
|
|
KRPC_VNET(svc_vc_tls_alerts)++;
|
|
KRPC_CURVNET_RESTORE();
|
|
/* Disable reception. */
|
|
xprt->xp_dontrcv = TRUE;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
ret = rpctls_srv_handlerecord(xprt->xp_sslsec,
|
|
xprt->xp_sslusec, xprt->xp_sslrefno,
|
|
xprt->xp_sslproc, &reterr);
|
|
sx_xlock(&xprt->xp_lock);
|
|
xprt->xp_dontrcv = FALSE;
|
|
if (ret != RPC_SUCCESS || reterr != RPCTLSERR_OK) {
|
|
/*
|
|
* All we can do is soreceive() it and
|
|
* then toss it.
|
|
*/
|
|
rcvflag = MSG_DONTWAIT;
|
|
goto tryagain;
|
|
}
|
|
sx_xunlock(&xprt->xp_lock);
|
|
xprt_active(xprt); /* Harmless if already active. */
|
|
return (FALSE);
|
|
}
|
|
|
|
if (error) {
|
|
KRPC_CURVNET_RESTORE();
|
|
SOCK_RECVBUF_LOCK(so);
|
|
if (xprt->xp_upcallset) {
|
|
xprt->xp_upcallset = 0;
|
|
soupcall_clear(so, SO_RCV);
|
|
}
|
|
SOCK_RECVBUF_UNLOCK(so);
|
|
xprt_inactive_self(xprt);
|
|
cd->strm_stat = XPRT_DIED;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (!m) {
|
|
KRPC_CURVNET_RESTORE();
|
|
/*
|
|
* EOF - the other end has closed the socket.
|
|
*/
|
|
xprt_inactive_self(xprt);
|
|
cd->strm_stat = XPRT_DIED;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
/* Process any record header(s). */
|
|
if (ctrl != NULL) {
|
|
cmsg = mtod(ctrl, struct cmsghdr *);
|
|
if (cmsg->cmsg_type == TLS_GET_RECORD &&
|
|
cmsg->cmsg_len == CMSG_LEN(sizeof(tgr))) {
|
|
memcpy(&tgr, CMSG_DATA(cmsg), sizeof(tgr));
|
|
/*
|
|
* TLS_RLTYPE_ALERT records should be handled
|
|
* since soreceive() would have returned
|
|
* ENXIO. Just throw any other
|
|
* non-TLS_RLTYPE_APP records away.
|
|
*/
|
|
if (tgr.tls_type != TLS_RLTYPE_APP) {
|
|
m_freem(m);
|
|
m_free(ctrl);
|
|
rcvflag = MSG_DONTWAIT | MSG_TLSAPPDATA;
|
|
KRPC_CURVNET_RESTORE();
|
|
goto tryagain;
|
|
}
|
|
KRPC_VNET(svc_vc_tls_rx_msgcnt)++;
|
|
KRPC_VNET(svc_vc_tls_rx_msgbytes) +=
|
|
1000000000 - uio.uio_resid;
|
|
}
|
|
m_free(ctrl);
|
|
} else {
|
|
KRPC_VNET(svc_vc_rx_msgcnt)++;
|
|
KRPC_VNET(svc_vc_rx_msgbytes) += 1000000000 -
|
|
uio.uio_resid;
|
|
}
|
|
KRPC_CURVNET_RESTORE();
|
|
|
|
if (cd->mpending)
|
|
m_last(cd->mpending)->m_next = m;
|
|
else
|
|
cd->mpending = m;
|
|
}
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr **addrp, struct mbuf **mp)
|
|
{
|
|
struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
|
|
struct ct_data *ct;
|
|
struct mbuf *m;
|
|
XDR xdrs;
|
|
|
|
sx_xlock(&xprt->xp_lock);
|
|
ct = (struct ct_data *)xprt->xp_p2;
|
|
if (ct == NULL) {
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
mtx_lock(&ct->ct_lock);
|
|
m = cd->mreq;
|
|
if (m == NULL) {
|
|
xprt_inactive_self(xprt);
|
|
mtx_unlock(&ct->ct_lock);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
return (FALSE);
|
|
}
|
|
cd->mreq = m->m_nextpkt;
|
|
mtx_unlock(&ct->ct_lock);
|
|
sx_xunlock(&xprt->xp_lock);
|
|
|
|
xdrmbuf_create(&xdrs, m, XDR_DECODE);
|
|
if (! xdr_callmsg(&xdrs, msg)) {
|
|
XDR_DESTROY(&xdrs);
|
|
return (FALSE);
|
|
}
|
|
*addrp = NULL;
|
|
*mp = xdrmbuf_getall(&xdrs);
|
|
XDR_DESTROY(&xdrs);
|
|
return (TRUE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
|
|
{
|
|
XDR xdrs;
|
|
struct mbuf *mrep;
|
|
bool_t stat = TRUE;
|
|
int error, len, maxextsiz;
|
|
#ifdef KERN_TLS
|
|
u_int maxlen;
|
|
#endif
|
|
|
|
/*
|
|
* Leave space for record mark.
|
|
*/
|
|
mrep = m_gethdr(M_WAITOK, MT_DATA);
|
|
mrep->m_data += sizeof(uint32_t);
|
|
|
|
xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
|
|
|
|
if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
|
|
msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
|
|
if (!xdr_replymsg(&xdrs, msg))
|
|
stat = FALSE;
|
|
else
|
|
xdrmbuf_append(&xdrs, m);
|
|
} else {
|
|
stat = xdr_replymsg(&xdrs, msg);
|
|
}
|
|
|
|
if (stat) {
|
|
m_fixhdr(mrep);
|
|
|
|
/*
|
|
* Prepend a record marker containing the reply length.
|
|
*/
|
|
M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
|
|
len = mrep->m_pkthdr.len;
|
|
*mtod(mrep, uint32_t *) =
|
|
htonl(0x80000000 | (len - sizeof(uint32_t)));
|
|
|
|
/* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
|
|
KRPC_CURVNET_SET(xprt->xp_socket->so_vnet);
|
|
if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
|
|
/*
|
|
* Copy the mbuf chain to a chain of
|
|
* ext_pgs mbuf(s) as required by KERN_TLS.
|
|
*/
|
|
maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
|
|
#ifdef KERN_TLS
|
|
if (rpctls_getinfo(&maxlen, false, false))
|
|
maxextsiz = min(maxextsiz, maxlen);
|
|
#endif
|
|
mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
|
|
KRPC_VNET(svc_vc_tls_tx_msgcnt)++;
|
|
KRPC_VNET(svc_vc_tls_tx_msgbytes) += len;
|
|
} else {
|
|
KRPC_VNET(svc_vc_tx_msgcnt)++;
|
|
KRPC_VNET(svc_vc_tx_msgbytes) += len;
|
|
}
|
|
KRPC_CURVNET_RESTORE();
|
|
atomic_add_32(&xprt->xp_snd_cnt, len);
|
|
/*
|
|
* sosend consumes mreq.
|
|
*/
|
|
error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
|
|
0, curthread);
|
|
if (!error) {
|
|
atomic_add_rel_32(&xprt->xp_snt_cnt, len);
|
|
if (seq)
|
|
*seq = xprt->xp_snd_cnt;
|
|
stat = TRUE;
|
|
} else
|
|
atomic_subtract_32(&xprt->xp_snd_cnt, len);
|
|
} else {
|
|
m_freem(mrep);
|
|
}
|
|
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
return (stat);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
|
|
struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
|
|
{
|
|
struct ct_data *ct;
|
|
XDR xdrs;
|
|
struct mbuf *mrep;
|
|
bool_t stat = TRUE;
|
|
int error, maxextsiz;
|
|
#ifdef KERN_TLS
|
|
u_int maxlen;
|
|
#endif
|
|
|
|
/*
|
|
* Leave space for record mark.
|
|
*/
|
|
mrep = m_gethdr(M_WAITOK, MT_DATA);
|
|
mrep->m_data += sizeof(uint32_t);
|
|
|
|
xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
|
|
|
|
if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
|
|
msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
|
|
if (!xdr_replymsg(&xdrs, msg))
|
|
stat = FALSE;
|
|
else
|
|
xdrmbuf_append(&xdrs, m);
|
|
} else {
|
|
stat = xdr_replymsg(&xdrs, msg);
|
|
}
|
|
|
|
if (stat) {
|
|
m_fixhdr(mrep);
|
|
|
|
/*
|
|
* Prepend a record marker containing the reply length.
|
|
*/
|
|
M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
|
|
*mtod(mrep, uint32_t *) =
|
|
htonl(0x80000000 | (mrep->m_pkthdr.len
|
|
- sizeof(uint32_t)));
|
|
|
|
/* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
|
|
if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
|
|
/*
|
|
* Copy the mbuf chain to a chain of
|
|
* ext_pgs mbuf(s) as required by KERN_TLS.
|
|
*/
|
|
maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
|
|
#ifdef KERN_TLS
|
|
if (rpctls_getinfo(&maxlen, false, false))
|
|
maxextsiz = min(maxextsiz, maxlen);
|
|
#endif
|
|
mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
|
|
}
|
|
sx_xlock(&xprt->xp_lock);
|
|
ct = (struct ct_data *)xprt->xp_p2;
|
|
if (ct != NULL)
|
|
error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
|
|
0, curthread);
|
|
else
|
|
error = EPIPE;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
if (!error) {
|
|
stat = TRUE;
|
|
}
|
|
} else {
|
|
m_freem(mrep);
|
|
}
|
|
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
return (stat);
|
|
}
|
|
|
|
static bool_t
|
|
svc_vc_null(void)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static int
|
|
svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
|
|
{
|
|
SVCXPRT *xprt = (SVCXPRT *) arg;
|
|
|
|
if (soreadable(xprt->xp_socket))
|
|
xprt_active(xprt);
|
|
return (SU_OK);
|
|
}
|
|
|
|
static int
|
|
svc_vc_rendezvous_soupcall(struct socket *head, void *arg, int waitflag)
|
|
{
|
|
SVCXPRT *xprt = (SVCXPRT *) arg;
|
|
|
|
if (!TAILQ_EMPTY(&head->sol_comp))
|
|
xprt_active(xprt);
|
|
return (SU_OK);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Get the effective UID of the sending process. Used by rpcbind, keyserv
|
|
* and rpc.yppasswdd on AF_LOCAL.
|
|
*/
|
|
int
|
|
__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
|
|
int sock, ret;
|
|
gid_t egid;
|
|
uid_t euid;
|
|
struct sockaddr *sa;
|
|
|
|
sock = transp->xp_fd;
|
|
sa = (struct sockaddr *)transp->xp_rtaddr;
|
|
if (sa->sa_family == AF_LOCAL) {
|
|
ret = getpeereid(sock, &euid, &egid);
|
|
if (ret == 0)
|
|
*uid = euid;
|
|
return (ret);
|
|
} else
|
|
return (-1);
|
|
}
|
|
#endif
|