2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
315 lines
8 KiB
Groff
315 lines
8 KiB
Groff
.\" @(#)rpc_svc_create.3n 1.26 93/08/26 SMI; from SVr4
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.\" Copyright 1989 AT&T
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.\" @(#)rpc_svc_create 1.3 89/06/28 SMI;
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.\" Copyright (c) 1988 Sun Microsystems, Inc. - All Rights Reserved.
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.\" $NetBSD: rpc_svc_create.3,v 1.11 2010/03/22 19:30:54 joerg Exp $
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.Dd May 3, 1993
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.Dt RPC_SVC_CREATE 3
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.Os
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.Sh NAME
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.Nm rpc_svc_create ,
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.Nm svc_control ,
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.Nm svc_create ,
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.Nm svc_destroy ,
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.Nm svc_dg_create ,
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.Nm svc_fd_create ,
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.Nm svc_raw_create ,
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.Nm svc_tli_create ,
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.Nm svc_tp_create ,
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.Nm svc_vc_create
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.Nd library routines for the creation of server handles
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In rpc/rpc.h
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.Ft bool_t
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.Fn svc_control "SVCXPRT *svc" "const u_int req" "void *info"
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.Ft int
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.Fn svc_create "const void (*dispatch)(struct svc_req *, SVCXPRT *)" "const rpcprog_t prognum" "const rpcvers_t versnum" "const char *nettype"
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.Ft SVCXPRT *"
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.Fn svc_dg_create "const int fildes" "const u_int sendsz" "const u_int recvsz"
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.Ft void
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.Fn svc_destroy "SVCXPRT *xprt"
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.Ft "SVCXPRT *"
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.Fn svc_fd_create "const int fildes" "const u_int sendsz" "const u_int recvsz"
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.Ft "SVCXPRT *"
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.Fn svc_raw_create "void"
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.Ft "SVCXPRT *"
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.Fn svc_tli_create "const int fildes" "const struct netconfig *netconf" "const struct t_bind *bindaddr" "const u_int sendsz" "const u_int recvsz"
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.Ft "SVCXPRT *"
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.Fn svc_tp_create "const void (*dispatch)(const struct svc_reg *, const SVCXPRT *)" "const rpcprog_t prognum" "const rpcvers_t versnum" "const struct netconfig *netconf"
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.Ft "SVCXPRT *"
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.Fn svc_vc_create "const int fildes" "const u_int sendsz" "const u_int recvsz"
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.Sh DESCRIPTION
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These routines are part of the RPC
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library which allows C language programs to make procedure
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calls on servers across the network.
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These routines deal with the creation of service handles.
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Once the handle is created, the server can be invoked by calling
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.Fn svc_run .
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.Sh ROUTINES
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See
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.Xr rpc 3
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for the definition of the
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.Dv SVCXPRT
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data structure.
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.Pp
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.Bl -tag -width XXXXX
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.It Fn svc_control
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A function to change or retrieve various information
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about a service object.
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.Fa req
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indicates the type of operation and
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.Fa info
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is a pointer to the information.
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The supported values of
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.Fa req ,
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their argument types, and what they do are:
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.Bl -tag -width SVCGET_XID
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.It Dv SVCGET_VERSQUIET
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If a request is received for a program number
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served by this server but the version number
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is outside the range registered with the server,
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an
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.Dv RPC_PROGVERSMISMATCH
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error will normally
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be returned.
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.Fa info
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should be a pointer to an integer.
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Upon successful completion of the
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.Dv SVCGET_VERSQUIET
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request,
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.Fa *info
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contains an
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integer which describes the server's current
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behavior: 0 indicates normal server behavior
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(that is, an
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.Dv RPC_PROGVERSMISMATCH
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error
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will be returned); 1 indicates that the out of
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range request will be silently ignored.
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.Pp
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.It Dv SVCSET_VERSQUIET
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If a request is received for a program number
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served by this server but the version number
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is outside the range registered with the server,
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an
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.Dv RPC_PROGVERSMISMATCH
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error will normally be returned.
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It is sometimes desirable to change this behavior.
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.Fa info
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should be a
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pointer to an integer which is either 0
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(indicating normal server behavior - an
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.Dv RPC_PROGVERSMISMATCH
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error will be returned),
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or 1 (indicating that the out of range request
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should be silently ignored).
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.El
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.Pp
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.It Fn svc_create
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.Fn svc_create
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creates server handles for all the transports
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belonging to the class
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.Fa nettype .
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.Fa nettype
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defines a class of transports which can be used
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for a particular application.
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The transports are tried in left to right order in
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.Ev NETPATH
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variable or in top to bottom order in the netconfig database.
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If
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.Fa nettype
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is
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.Dv NULL ,
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it defaults to
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.Dv netpath .
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.Pp
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.Fn svc_create
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registers itself with the rpcbind
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service (see
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.Xr rpcbind 8 ) .
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.Fa dispatch
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is called when there is a remote procedure call for the given
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.Fa prognum
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and
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.Fa versnum ;
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this requires calling
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.Fn svc_run
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(see
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.Fn svc_run
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in
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.Xr rpc_svc_reg 3 ) .
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If
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.Fn svc_create
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succeeds, it returns the number of server
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handles it created,
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otherwise it returns 0 and an error message is logged.
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.Pp
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.It Fn svc_destroy
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A function macro that destroys the RPC
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service handle
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.Fa xprt .
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Destruction usually involves deallocation
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of private data structures,
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including
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.Fa xprt
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itself.
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Use of
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.Fa xprt
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is undefined after calling this routine.
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.Pp
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.It Fn svc_dg_create
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This routine creates a connectionless RPC
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service handle, and returns a pointer to it.
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This routine returns
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.Dv NULL
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if it fails, and an error message is logged.
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.Fa sendsz
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and
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.Fa recvsz
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are parameters used to specify the size of the buffers.
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If they are 0, suitable defaults are chosen.
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The file descriptor
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.Fa fildes
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should be open and bound.
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The server is not registered with
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.Xr rpcbind 8 .
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.Em Warning :
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since connectionless-based RPC
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messages can only hold limited amount of encoded data,
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this transport cannot be used for procedures
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that take large arguments or return huge results.
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.Pp
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.It Fn svc_fd_create
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This routine creates a service on top of an open and bound file descriptor,
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and returns the handle to it.
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Typically, this descriptor is a connected file descriptor for a
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connection-oriented transport.
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.Fa sendsz
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and
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.Fa recvsz
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indicate sizes for the send and receive buffers.
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If they are 0, reasonable defaults are chosen.
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This routine returns
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.Dv NULL
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if it fails, and an error message is logged.
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.Pp
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.It Fn svc_raw_create
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This routine creates an RPC
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service handle and returns a pointer to it.
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The transport is really a buffer within the process's
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address space, so the corresponding RPC
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client should live in the same address space;
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(see
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.Fn clnt_raw_create
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in
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.Xr rpc_clnt_create 3 ) .
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This routine allows simulation of RPC and acquisition of
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RPC overheads (such as round trip times),
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without any kernel and networking interference.
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This routine returns
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.Dv NULL
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if it fails, and an error message is logged.
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.Em Note :
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.Fn svc_run
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should not be called when the raw interface is being used.
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.Pp
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.It Fn svc_tli_create
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This routine creates an RPC
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server handle, and returns a pointer to it.
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.Fa fildes
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is the file descriptor on which the service is listening.
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If
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.Fa fildes
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is
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.Dv RPC_ANYFD ,
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it opens a file descriptor on the transport specified by
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.Fa netconf .
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If the file descriptor is unbound and
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.Fa bindaddr
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is non-null
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.Fa fildes
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is bound to the address specified by
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.Fa bindaddr ,
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otherwise
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.Fa fildes
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is bound to a default address chosen by the transport.
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.Pp
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Note: the
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.Vt t_bind
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structure comes from the TLI/XTI SysV interface, which
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.Nx
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does not use.
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The structure is defined in
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.In rpc/types.h
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for compatibility as:
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.Bd -literal
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struct t_bind {
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struct netbuf addr; /* network address, see rpc(3) */
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unsigned int qlen; /* queue length (for listen(2)) */
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};
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.Ed
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.Pp
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In the case where the default address is chosen,
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the number of outstanding connect requests is set to 8
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for connection-oriented transports.
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The user may specify the size of the send and receive buffers
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with the parameters
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.Fa sendsz
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and
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.Fa recvsz ;
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values of 0 choose suitable defaults.
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This routine returns
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.Dv NULL
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if it fails,
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and an error message is logged.
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The server is not registered with the
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.Xr rpcbind 8
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service.
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.Pp
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.It Fn svc_tp_create
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.Fn svc_tp_create
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creates a server handle for the network
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specified by
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.Fa netconf ,
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and registers itself with the rpcbind service.
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.Fa dispatch
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is called when there is a remote procedure call
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for the given
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.Fa prognum
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and
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.Fa versnum ;
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this requires calling
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.Fn svc_run .
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.Fn svc_tp_create
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returns the service handle if it succeeds,
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otherwise a
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.Dv NULL
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is returned and an error message is logged.
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.Pp
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.It Fn svc_vc_create
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This routine creates a connection-oriented RPC
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service and returns a pointer to it.
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This routine returns
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.Dv NULL
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if it fails, and an error message is logged.
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The users may specify the size of the send and receive buffers
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with the parameters
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.Fa sendsz
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and
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.Fa recvsz ;
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values of 0 choose suitable defaults.
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The file descriptor
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.Fa fildes
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should be open and bound.
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The server is not registered with the
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.Xr rpcbind 8
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service.
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.El
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.Sh SEE ALSO
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.Xr rpc 3 ,
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.Xr rpc_svc_calls 3 ,
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.Xr rpc_svc_err 3 ,
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.Xr rpc_svc_reg 3 ,
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.Xr rpcbind 8
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