| 1 | /* $NetBSD: svc.h,v 1.17 2000/06/02 22:57:56 fvdl Exp $ */ |
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| 2 | |
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| 3 | /*- |
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| 4 | * SPDX-License-Identifier: BSD-3-Clause |
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| 5 | * |
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| 6 | * Copyright (c) 2009, Sun Microsystems, Inc. |
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| 7 | * All rights reserved. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions are met: |
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| 11 | * - Redistributions of source code must retain the above copyright notice, |
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| 12 | * this list of conditions and the following disclaimer. |
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| 13 | * - Redistributions in binary form must reproduce the above copyright notice, |
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| 14 | * this list of conditions and the following disclaimer in the documentation |
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| 15 | * and/or other materials provided with the distribution. |
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| 16 | * - Neither the name of Sun Microsystems, Inc. nor the names of its |
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| 17 | * contributors may be used to endorse or promote products derived |
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| 18 | * from this software without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| 24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 30 | * POSSIBILITY OF SUCH DAMAGE. |
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| 31 | * |
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| 32 | * from: @(#)svc.h 1.35 88/12/17 SMI |
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| 33 | * from: @(#)svc.h 1.27 94/04/25 SMI |
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| 34 | * $FreeBSD$ |
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| 35 | */ |
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| 36 | |
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| 37 | /* |
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| 38 | * svc.h, Server-side remote procedure call interface. |
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| 39 | * |
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| 40 | * Copyright (C) 1986-1993 by Sun Microsystems, Inc. |
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| 41 | */ |
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| 42 | |
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| 43 | #ifndef _RPC_SVC_H |
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| 44 | #define _RPC_SVC_H |
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| 45 | #include <sys/cdefs.h> |
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| 46 | |
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| 47 | /* |
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| 48 | * This interface must manage two items concerning remote procedure calling: |
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| 49 | * |
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| 50 | * 1) An arbitrary number of transport connections upon which rpc requests |
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| 51 | * are received. The two most notable transports are TCP and UDP; they are |
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| 52 | * created and registered by routines in svc_tcp.c and svc_udp.c, respectively; |
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| 53 | * they in turn call xprt_register and xprt_unregister. |
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| 54 | * |
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| 55 | * 2) An arbitrary number of locally registered services. Services are |
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| 56 | * described by the following four data: program number, version number, |
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| 57 | * "service dispatch" function, a transport handle, and a boolean that |
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| 58 | * indicates whether or not the exported program should be registered with a |
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| 59 | * local binder service; if true the program's number and version and the |
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| 60 | * port number from the transport handle are registered with the binder. |
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| 61 | * These data are registered with the rpc svc system via svc_register. |
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| 62 | * |
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| 63 | * A service's dispatch function is called whenever an rpc request comes in |
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| 64 | * on a transport. The request's program and version numbers must match |
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| 65 | * those of the registered service. The dispatch function is passed two |
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| 66 | * parameters, struct svc_req * and SVCXPRT *, defined below. |
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| 67 | */ |
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| 68 | |
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| 69 | /* |
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| 70 | * Service control requests |
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| 71 | */ |
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| 72 | #define SVCGET_VERSQUIET 1 |
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| 73 | #define SVCSET_VERSQUIET 2 |
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| 74 | #define SVCGET_CONNMAXREC 3 |
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| 75 | #define SVCSET_CONNMAXREC 4 |
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| 76 | |
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| 77 | /* |
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| 78 | * Operations for rpc_control(). |
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| 79 | */ |
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| 80 | #define RPC_SVC_CONNMAXREC_SET 0 /* set max rec size, enable nonblock */ |
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| 81 | #define RPC_SVC_CONNMAXREC_GET 1 |
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| 82 | |
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| 83 | enum xprt_stat { |
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| 84 | XPRT_DIED, |
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| 85 | XPRT_MOREREQS, |
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| 86 | XPRT_IDLE, |
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| 87 | _XPRT_STAT = 0xffffffff |
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| 88 | }; |
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| 89 | |
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| 90 | /* |
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| 91 | * Server side transport handle |
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| 92 | */ |
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| 93 | typedef struct __rpc_svcxprt { |
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| 94 | int xp_fd; |
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| 95 | #define xp_sock xp_fd |
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| 96 | u_short xp_port; /* associated port number */ |
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| 97 | const struct xp_ops { |
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| 98 | /* receive incoming requests */ |
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| 99 | bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *); |
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| 100 | /* get transport status */ |
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| 101 | enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *); |
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| 102 | /* get arguments */ |
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| 103 | bool_t (*xp_getargs)(struct __rpc_svcxprt *, xdrproc_t, |
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| 104 | void *); |
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| 105 | /* send reply */ |
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| 106 | bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *); |
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| 107 | /* free mem allocated for args */ |
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| 108 | bool_t (*xp_freeargs)(struct __rpc_svcxprt *, xdrproc_t, |
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| 109 | void *); |
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| 110 | /* destroy this struct */ |
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| 111 | void (*xp_destroy)(struct __rpc_svcxprt *); |
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| 112 | } *xp_ops; |
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| 113 | int xp_addrlen; /* length of remote address */ |
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| 114 | struct sockaddr_in xp_raddr; /* remote addr. (backward ABI compat) */ |
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| 115 | /* XXX - fvdl stick this here for ABI backward compat reasons */ |
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| 116 | const struct xp_ops2 { |
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| 117 | /* catch-all function */ |
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| 118 | bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int, |
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| 119 | void *); |
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| 120 | } *xp_ops2; |
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| 121 | char *xp_tp; /* transport provider device name */ |
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| 122 | char *xp_netid; /* network token */ |
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| 123 | struct netbuf xp_ltaddr; /* local transport address */ |
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| 124 | struct netbuf xp_rtaddr; /* remote transport address */ |
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| 125 | struct opaque_auth xp_verf; /* raw response verifier */ |
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| 126 | void *xp_p1; /* private: for use by svc ops */ |
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| 127 | void *xp_p2; /* private: for use by svc ops */ |
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| 128 | void *xp_p3; /* private: for use by svc lib */ |
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| 129 | int xp_type; /* transport type */ |
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| 130 | } SVCXPRT; |
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| 131 | |
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| 132 | /* |
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| 133 | * Interface to server-side authentication flavors. |
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| 134 | */ |
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| 135 | typedef struct __rpc_svcauth { |
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| 136 | struct svc_auth_ops { |
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| 137 | int (*svc_ah_wrap)(struct __rpc_svcauth *, XDR *, |
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| 138 | xdrproc_t, caddr_t); |
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| 139 | int (*svc_ah_unwrap)(struct __rpc_svcauth *, XDR *, |
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| 140 | xdrproc_t, caddr_t); |
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| 141 | } *svc_ah_ops; |
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| 142 | void *svc_ah_private; |
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| 143 | } SVCAUTH; |
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| 144 | |
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| 145 | /* |
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| 146 | * Server transport extensions (accessed via xp_p3). |
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| 147 | */ |
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| 148 | typedef struct __rpc_svcxprt_ext { |
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| 149 | int xp_flags; /* versquiet */ |
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| 150 | SVCAUTH xp_auth; /* interface to auth methods */ |
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| 151 | } SVCXPRT_EXT; |
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| 152 | |
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| 153 | /* |
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| 154 | * Service request |
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| 155 | */ |
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| 156 | struct svc_req { |
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| 157 | u_int32_t rq_prog; /* service program number */ |
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| 158 | u_int32_t rq_vers; /* service protocol version */ |
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| 159 | u_int32_t rq_proc; /* the desired procedure */ |
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| 160 | struct opaque_auth rq_cred; /* raw creds from the wire */ |
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| 161 | void *rq_clntcred; /* read only cooked cred */ |
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| 162 | SVCXPRT *rq_xprt; /* associated transport */ |
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| 163 | }; |
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| 164 | |
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| 165 | /* |
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| 166 | * Approved way of getting address of caller |
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| 167 | */ |
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| 168 | #define svc_getrpccaller(x) (&(x)->xp_rtaddr) |
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| 169 | |
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| 170 | /* |
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| 171 | * Operations defined on an SVCXPRT handle |
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| 172 | * |
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| 173 | * SVCXPRT *xprt; |
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| 174 | * struct rpc_msg *msg; |
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| 175 | * xdrproc_t xargs; |
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| 176 | * void * argsp; |
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| 177 | */ |
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| 178 | #define SVC_RECV(xprt, msg) \ |
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| 179 | (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) |
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| 180 | #define svc_recv(xprt, msg) \ |
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| 181 | (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) |
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| 182 | |
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| 183 | #define SVC_STAT(xprt) \ |
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| 184 | (*(xprt)->xp_ops->xp_stat)(xprt) |
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| 185 | #define svc_stat(xprt) \ |
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| 186 | (*(xprt)->xp_ops->xp_stat)(xprt) |
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| 187 | |
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| 188 | #define SVC_GETARGS(xprt, xargs, argsp) \ |
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| 189 | (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) |
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| 190 | #define svc_getargs(xprt, xargs, argsp) \ |
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| 191 | (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) |
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| 192 | |
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| 193 | #define SVC_REPLY(xprt, msg) \ |
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| 194 | (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) |
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| 195 | #define svc_reply(xprt, msg) \ |
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| 196 | (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) |
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| 197 | |
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| 198 | #define SVC_FREEARGS(xprt, xargs, argsp) \ |
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| 199 | (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) |
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| 200 | #define svc_freeargs(xprt, xargs, argsp) \ |
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| 201 | (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) |
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| 202 | |
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| 203 | #define SVC_DESTROY(xprt) \ |
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| 204 | (*(xprt)->xp_ops->xp_destroy)(xprt) |
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| 205 | #define svc_destroy(xprt) \ |
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| 206 | (*(xprt)->xp_ops->xp_destroy)(xprt) |
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| 207 | |
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| 208 | #define SVC_CONTROL(xprt, rq, in) \ |
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| 209 | (*(xprt)->xp_ops2->xp_control)((xprt), (rq), (in)) |
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| 210 | |
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| 211 | #define SVC_EXT(xprt) \ |
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| 212 | ((SVCXPRT_EXT *) xprt->xp_p3) |
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| 213 | |
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| 214 | #define SVC_AUTH(xprt) \ |
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| 215 | (SVC_EXT(xprt)->xp_auth) |
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| 216 | |
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| 217 | /* |
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| 218 | * Operations defined on an SVCAUTH handle |
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| 219 | */ |
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| 220 | #define SVCAUTH_WRAP(auth, xdrs, xfunc, xwhere) \ |
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| 221 | ((auth)->svc_ah_ops->svc_ah_wrap(auth, xdrs, xfunc, xwhere)) |
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| 222 | #define SVCAUTH_UNWRAP(auth, xdrs, xfunc, xwhere) \ |
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| 223 | ((auth)->svc_ah_ops->svc_ah_unwrap(auth, xdrs, xfunc, xwhere)) |
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| 224 | |
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| 225 | /* |
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| 226 | * Service registration |
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| 227 | * |
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| 228 | * svc_reg(xprt, prog, vers, dispatch, nconf) |
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| 229 | * const SVCXPRT *xprt; |
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| 230 | * const rpcprog_t prog; |
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| 231 | * const rpcvers_t vers; |
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| 232 | * const void (*dispatch)(struct svc_req *, SVCXPRT *); |
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| 233 | * const struct netconfig *nconf; |
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| 234 | */ |
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| 235 | |
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| 236 | __BEGIN_DECLS |
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| 237 | extern bool_t svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t, |
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| 238 | void (*)(struct svc_req *, SVCXPRT *), |
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| 239 | const struct netconfig *); |
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| 240 | __END_DECLS |
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| 241 | |
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| 242 | /* |
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| 243 | * Service un-registration |
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| 244 | * |
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| 245 | * svc_unreg(prog, vers) |
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| 246 | * const rpcprog_t prog; |
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| 247 | * const rpcvers_t vers; |
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| 248 | */ |
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| 249 | |
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| 250 | __BEGIN_DECLS |
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| 251 | extern void svc_unreg(const rpcprog_t, const rpcvers_t); |
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| 252 | __END_DECLS |
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| 253 | |
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| 254 | /* |
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| 255 | * Transport registration. |
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| 256 | * |
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| 257 | * xprt_register(xprt) |
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| 258 | * SVCXPRT *xprt; |
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| 259 | */ |
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| 260 | __BEGIN_DECLS |
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| 261 | extern void xprt_register(SVCXPRT *); |
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| 262 | __END_DECLS |
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| 263 | |
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| 264 | /* |
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| 265 | * Transport un-register |
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| 266 | * |
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| 267 | * xprt_unregister(xprt) |
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| 268 | * SVCXPRT *xprt; |
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| 269 | */ |
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| 270 | __BEGIN_DECLS |
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| 271 | extern void xprt_unregister(SVCXPRT *); |
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| 272 | __END_DECLS |
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| 273 | |
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| 274 | |
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| 275 | /* |
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| 276 | * When the service routine is called, it must first check to see if it |
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| 277 | * knows about the procedure; if not, it should call svcerr_noproc |
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| 278 | * and return. If so, it should deserialize its arguments via |
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| 279 | * SVC_GETARGS (defined above). If the deserialization does not work, |
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| 280 | * svcerr_decode should be called followed by a return. Successful |
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| 281 | * decoding of the arguments should be followed the execution of the |
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| 282 | * procedure's code and a call to svc_sendreply. |
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| 283 | * |
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| 284 | * Also, if the service refuses to execute the procedure due to too- |
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| 285 | * weak authentication parameters, svcerr_weakauth should be called. |
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| 286 | * Note: do not confuse access-control failure with weak authentication! |
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| 287 | * |
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| 288 | * NB: In pure implementations of rpc, the caller always waits for a reply |
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| 289 | * msg. This message is sent when svc_sendreply is called. |
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| 290 | * Therefore pure service implementations should always call |
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| 291 | * svc_sendreply even if the function logically returns void; use |
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| 292 | * xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows |
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| 293 | * for the abuse of pure rpc via batched calling or pipelining. In the |
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| 294 | * case of a batched call, svc_sendreply should NOT be called since |
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| 295 | * this would send a return message, which is what batching tries to avoid. |
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| 296 | * It is the service/protocol writer's responsibility to know which calls are |
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| 297 | * batched and which are not. Warning: responding to batch calls may |
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| 298 | * deadlock the caller and server processes! |
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| 299 | */ |
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| 300 | |
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| 301 | __BEGIN_DECLS |
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| 302 | extern bool_t svc_sendreply(SVCXPRT *, xdrproc_t, void *); |
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| 303 | extern void svcerr_decode(SVCXPRT *); |
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| 304 | extern void svcerr_weakauth(SVCXPRT *); |
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| 305 | extern void svcerr_noproc(SVCXPRT *); |
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| 306 | extern void svcerr_progvers(SVCXPRT *, rpcvers_t, rpcvers_t); |
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| 307 | extern void svcerr_auth(SVCXPRT *, enum auth_stat); |
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| 308 | extern void svcerr_noprog(SVCXPRT *); |
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| 309 | extern void svcerr_systemerr(SVCXPRT *); |
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| 310 | extern int rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t, |
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| 311 | char *(*)(char *), xdrproc_t, xdrproc_t, |
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| 312 | char *); |
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| 313 | __END_DECLS |
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| 314 | |
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| 315 | /* |
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| 316 | * Lowest level dispatching -OR- who owns this process anyway. |
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| 317 | * Somebody has to wait for incoming requests and then call the correct |
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| 318 | * service routine. The routine svc_run does infinite waiting; i.e., |
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| 319 | * svc_run never returns. |
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| 320 | * Since another (co-existent) package may wish to selectively wait for |
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| 321 | * incoming calls or other events outside of the rpc architecture, the |
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| 322 | * routine svc_getreq is provided. It must be passed readfds, the |
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| 323 | * "in-place" results of a select system call (see select, section 2). |
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| 324 | */ |
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| 325 | |
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| 326 | /* |
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| 327 | * Global keeper of rpc service descriptors in use |
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| 328 | * dynamic; must be inspected before each call to select |
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| 329 | */ |
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| 330 | extern int svc_maxfd; |
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| 331 | #ifdef FD_SETSIZE |
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| 332 | extern fd_set svc_fdset; |
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| 333 | #define svc_fds svc_fdset.fds_bits[0] /* compatibility */ |
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| 334 | #else |
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| 335 | extern int svc_fds; |
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| 336 | #endif /* def FD_SETSIZE */ |
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| 337 | |
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| 338 | /* |
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| 339 | * A set of null auth methods used by any authentication protocols |
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| 340 | * that don't need to inspect or modify the message body. |
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| 341 | */ |
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| 342 | extern SVCAUTH _svc_auth_null; |
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| 343 | |
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| 344 | /* |
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| 345 | * a small program implemented by the svc_rpc implementation itself; |
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| 346 | * also see clnt.h for protocol numbers. |
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| 347 | */ |
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| 348 | __BEGIN_DECLS |
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| 349 | extern void rpctest_service(void); |
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| 350 | __END_DECLS |
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| 351 | |
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| 352 | __BEGIN_DECLS |
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| 353 | extern SVCXPRT *svc_xprt_alloc(void); |
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| 354 | extern void svc_xprt_free(SVCXPRT *); |
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| 355 | extern void svc_getreq(int); |
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| 356 | extern void svc_getreqset(fd_set *); |
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| 357 | extern void svc_getreq_common(int); |
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| 358 | struct pollfd; |
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| 359 | extern void svc_getreq_poll(struct pollfd *, int); |
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| 360 | |
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| 361 | extern void svc_run(void); |
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| 362 | extern void svc_exit(void); |
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| 363 | __END_DECLS |
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| 364 | |
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| 365 | /* |
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| 366 | * Socket to use on svcxxx_create call to get default socket |
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| 367 | */ |
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| 368 | #define RPC_ANYSOCK -1 |
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| 369 | #define RPC_ANYFD RPC_ANYSOCK |
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| 370 | |
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| 371 | /* |
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| 372 | * These are the existing service side transport implementations |
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| 373 | */ |
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| 374 | |
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| 375 | __BEGIN_DECLS |
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| 376 | /* |
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| 377 | * Transport independent svc_create routine. |
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| 378 | */ |
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| 379 | extern int svc_create(void (*)(struct svc_req *, SVCXPRT *), |
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| 380 | const rpcprog_t, const rpcvers_t, const char *); |
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| 381 | /* |
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| 382 | * void (*dispatch)(struct svc_req *, SVCXPRT *); |
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| 383 | * const rpcprog_t prognum; -- program number |
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| 384 | * const rpcvers_t versnum; -- version number |
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| 385 | * const char *nettype; -- network type |
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| 386 | */ |
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| 387 | |
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| 388 | |
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| 389 | /* |
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| 390 | * Generic server creation routine. It takes a netconfig structure |
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| 391 | * instead of a nettype. |
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| 392 | */ |
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| 393 | |
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| 394 | extern SVCXPRT *svc_tp_create(void (*)(struct svc_req *, SVCXPRT *), |
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| 395 | const rpcprog_t, const rpcvers_t, |
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| 396 | const struct netconfig *); |
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| 397 | /* |
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| 398 | * void (*dispatch)(struct svc_req *, SVCXPRT *); |
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| 399 | * const rpcprog_t prognum; -- program number |
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| 400 | * const rpcvers_t versnum; -- version number |
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| 401 | * const struct netconfig *nconf; -- netconfig structure |
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| 402 | */ |
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| 403 | |
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| 404 | |
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| 405 | /* |
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| 406 | * Generic TLI create routine |
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| 407 | */ |
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| 408 | extern SVCXPRT *svc_tli_create(const int, const struct netconfig *, |
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| 409 | const struct t_bind *, const u_int, |
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| 410 | const u_int); |
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| 411 | /* |
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| 412 | * const int fd; -- connection end point |
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| 413 | * const struct netconfig *nconf; -- netconfig structure for network |
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| 414 | * const struct t_bind *bindaddr; -- local bind address |
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| 415 | * const u_int sendsz; -- max sendsize |
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| 416 | * const u_int recvsz; -- max recvsize |
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| 417 | */ |
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| 418 | |
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| 419 | /* |
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| 420 | * Connectionless and connectionful create routines |
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| 421 | */ |
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| 422 | |
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| 423 | extern SVCXPRT *svc_vc_create(const int, const u_int, const u_int); |
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| 424 | /* |
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| 425 | * const int fd; -- open connection end point |
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| 426 | * const u_int sendsize; -- max send size |
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| 427 | * const u_int recvsize; -- max recv size |
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| 428 | */ |
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| 429 | |
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| 430 | /* |
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| 431 | * Added for compatibility to old rpc 4.0. Obsoleted by svc_vc_create(). |
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| 432 | */ |
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| 433 | extern SVCXPRT *svcunix_create(int, u_int, u_int, char *); |
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| 434 | |
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| 435 | extern SVCXPRT *svc_dg_create(const int, const u_int, const u_int); |
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| 436 | /* |
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| 437 | * const int fd; -- open connection |
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| 438 | * const u_int sendsize; -- max send size |
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| 439 | * const u_int recvsize; -- max recv size |
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| 440 | */ |
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| 441 | |
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| 442 | |
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| 443 | /* |
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| 444 | * the routine takes any *open* connection |
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| 445 | * descriptor as its first input and is used for open connections. |
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| 446 | */ |
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| 447 | extern SVCXPRT *svc_fd_create(const int, const u_int, const u_int); |
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| 448 | /* |
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| 449 | * const int fd; -- open connection end point |
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| 450 | * const u_int sendsize; -- max send size |
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| 451 | * const u_int recvsize; -- max recv size |
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| 452 | */ |
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| 453 | |
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| 454 | /* |
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| 455 | * Added for compatibility to old rpc 4.0. Obsoleted by svc_fd_create(). |
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| 456 | */ |
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| 457 | extern SVCXPRT *svcunixfd_create(int, u_int, u_int); |
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| 458 | |
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| 459 | /* |
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| 460 | * Memory based rpc (for speed check and testing) |
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| 461 | */ |
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| 462 | extern SVCXPRT *svc_raw_create(void); |
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| 463 | |
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| 464 | /* |
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| 465 | * svc_dg_enable_cache() enables the cache on dg transports. |
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| 466 | */ |
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| 467 | int svc_dg_enablecache(SVCXPRT *, const u_int); |
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| 468 | |
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| 469 | int __rpc_get_local_uid(SVCXPRT *_transp, uid_t *_uid); |
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| 470 | |
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| 471 | __END_DECLS |
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| 472 | |
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| 473 | |
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| 474 | /* for backward compatibility */ |
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| 475 | #include <rpc/svc_soc.h> |
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| 476 | |
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| 477 | #endif /* !_RPC_SVC_H */ |
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