freebsd-skq/sys/kern/uipc_domain.c

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
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* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
*/
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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
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#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
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#include <sys/domain.h>
#include <sys/eventhandler.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/socketvar.h>
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#include <sys/systm.h>
#include <net/vnet.h>
/*
* System initialization
*
* Note: domain initialization takes place on a per domain basis
* as a result of traversing a SYSINIT linker set. Most likely,
* each domain would want to call DOMAIN_SET(9) itself, which
* would cause the domain to be added just after domaininit()
* is called during startup.
*
* See DOMAIN_SET(9) for details on its use.
*/
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static void domaininit(void *);
SYSINIT(domain, SI_SUB_PROTO_DOMAININIT, SI_ORDER_ANY, domaininit, NULL);
static void domainfinalize(void *);
SYSINIT(domainfin, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, domainfinalize,
NULL);
static struct callout pffast_callout;
static struct callout pfslow_callout;
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static void pffasttimo(void *);
static void pfslowtimo(void *);
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struct domain *domains; /* registered protocol domains */
int domain_init_status = 0;
static struct mtx dom_mtx; /* domain list lock */
MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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/*
* Dummy protocol specific user requests function pointer array.
* All functions return EOPNOTSUPP.
*/
struct pr_usrreqs nousrreqs = {
.pru_accept = pru_accept_notsupp,
.pru_attach = pru_attach_notsupp,
.pru_bind = pru_bind_notsupp,
.pru_connect = pru_connect_notsupp,
.pru_connect2 = pru_connect2_notsupp,
.pru_control = pru_control_notsupp,
.pru_disconnect = pru_disconnect_notsupp,
.pru_listen = pru_listen_notsupp,
.pru_peeraddr = pru_peeraddr_notsupp,
.pru_rcvd = pru_rcvd_notsupp,
.pru_rcvoob = pru_rcvoob_notsupp,
.pru_send = pru_send_notsupp,
.pru_sense = pru_sense_null,
.pru_shutdown = pru_shutdown_notsupp,
.pru_sockaddr = pru_sockaddr_notsupp,
.pru_sosend = pru_sosend_notsupp,
.pru_soreceive = pru_soreceive_notsupp,
.pru_sopoll = pru_sopoll_notsupp,
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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};
static void
protosw_init(struct protosw *pr)
{
struct pr_usrreqs *pu;
pu = pr->pr_usrreqs;
KASSERT(pu != NULL, ("protosw_init: %ssw[%d] has no usrreqs!",
pr->pr_domain->dom_name,
(int)(pr - pr->pr_domain->dom_protosw)));
/*
* Protocol switch methods fall into three categories: mandatory,
* mandatory but protosw_init() provides a default, and optional.
*
* For true protocols (i.e., pru_attach != NULL), KASSERT truly
* mandatory methods with no defaults, and initialize defaults for
* other mandatory methods if the protocol hasn't defined an
* implementation (NULL function pointer).
*/
#if 0
if (pu->pru_attach != NULL) {
KASSERT(pu->pru_abort != NULL,
("protosw_init: %ssw[%d] pru_abort NULL",
pr->pr_domain->dom_name,
(int)(pr - pr->pr_domain->dom_protosw)));
KASSERT(pu->pru_send != NULL,
("protosw_init: %ssw[%d] pru_send NULL",
pr->pr_domain->dom_name,
(int)(pr - pr->pr_domain->dom_protosw)));
}
#endif
#define DEFAULT(foo, bar) if ((foo) == NULL) (foo) = (bar)
DEFAULT(pu->pru_accept, pru_accept_notsupp);
DEFAULT(pu->pru_aio_queue, pru_aio_queue_notsupp);
DEFAULT(pu->pru_bind, pru_bind_notsupp);
DEFAULT(pu->pru_bindat, pru_bindat_notsupp);
DEFAULT(pu->pru_connect, pru_connect_notsupp);
DEFAULT(pu->pru_connect2, pru_connect2_notsupp);
DEFAULT(pu->pru_connectat, pru_connectat_notsupp);
DEFAULT(pu->pru_control, pru_control_notsupp);
DEFAULT(pu->pru_disconnect, pru_disconnect_notsupp);
DEFAULT(pu->pru_listen, pru_listen_notsupp);
DEFAULT(pu->pru_peeraddr, pru_peeraddr_notsupp);
DEFAULT(pu->pru_rcvd, pru_rcvd_notsupp);
DEFAULT(pu->pru_rcvoob, pru_rcvoob_notsupp);
DEFAULT(pu->pru_sense, pru_sense_null);
DEFAULT(pu->pru_shutdown, pru_shutdown_notsupp);
DEFAULT(pu->pru_sockaddr, pru_sockaddr_notsupp);
DEFAULT(pu->pru_sosend, sosend_generic);
DEFAULT(pu->pru_soreceive, soreceive_generic);
DEFAULT(pu->pru_sopoll, sopoll_generic);
DEFAULT(pu->pru_ready, pru_ready_notsupp);
#undef DEFAULT
if (pr->pr_init)
(*pr->pr_init)();
}
/*
* Add a new protocol domain to the list of supported domains
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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* Note: you cant unload it again because a socket may be using it.
* XXX can't fail at this time.
*/
void
domain_init(void *arg)
{
struct domain *dp = arg;
struct protosw *pr;
if (dp->dom_init)
(*dp->dom_init)();
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
protosw_init(pr);
/*
* update global information about maximums
*/
max_hdr = max_linkhdr + max_protohdr;
max_datalen = MHLEN - max_hdr;
if (max_datalen < 1)
panic("%s: max_datalen < 1", __func__);
}
#ifdef VIMAGE
void
vnet_domain_init(void *arg)
{
/* Virtualized case is no different -- call init functions. */
domain_init(arg);
}
void
vnet_domain_uninit(void *arg)
{
struct domain *dp = arg;
if (dp->dom_destroy)
(*dp->dom_destroy)();
}
#endif
/*
* Add a new protocol domain to the list of supported domains
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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* Note: you cant unload it again because a socket may be using it.
* XXX can't fail at this time.
*/
void
domain_add(void *data)
{
struct domain *dp;
dp = (struct domain *)data;
mtx_lock(&dom_mtx);
dp->dom_next = domains;
domains = dp;
KASSERT(domain_init_status >= 1,
("attempt to domain_add(%s) before domaininit()",
dp->dom_name));
#ifndef INVARIANTS
if (domain_init_status < 1)
printf("WARNING: attempt to domain_add(%s) before "
"domaininit()\n", dp->dom_name);
#endif
#ifdef notyet
KASSERT(domain_init_status < 2,
("attempt to domain_add(%s) after domainfinalize()",
dp->dom_name));
#else
if (domain_init_status >= 2)
printf("WARNING: attempt to domain_add(%s) after "
"domainfinalize()\n", dp->dom_name);
#endif
mtx_unlock(&dom_mtx);
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}
/* ARGSUSED*/
static void
domaininit(void *dummy)
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{
if (max_linkhdr < 16) /* XXX */
max_linkhdr = 16;
callout_init(&pffast_callout, 1);
callout_init(&pfslow_callout, 1);
mtx_lock(&dom_mtx);
KASSERT(domain_init_status == 0, ("domaininit called too late!"));
domain_init_status = 1;
mtx_unlock(&dom_mtx);
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}
/* ARGSUSED*/
static void
domainfinalize(void *dummy)
{
mtx_lock(&dom_mtx);
KASSERT(domain_init_status == 1, ("domainfinalize called too late!"));
domain_init_status = 2;
mtx_unlock(&dom_mtx);
callout_reset(&pffast_callout, 1, pffasttimo, NULL);
callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
}
struct domain *
pffinddomain(int family)
{
struct domain *dp;
for (dp = domains; dp != NULL; dp = dp->dom_next)
if (dp->dom_family == family)
return (dp);
return (NULL);
}
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struct protosw *
pffindtype(int family, int type)
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{
struct domain *dp;
struct protosw *pr;
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dp = pffinddomain(family);
if (dp == NULL)
return (NULL);
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_type && pr->pr_type == type)
return (pr);
return (NULL);
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}
struct protosw *
pffindproto(int family, int protocol, int type)
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{
struct domain *dp;
struct protosw *pr;
struct protosw *maybe;
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maybe = NULL;
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if (family == 0)
return (NULL);
dp = pffinddomain(family);
if (dp == NULL)
return (NULL);
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
return (pr);
if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
pr->pr_protocol == 0 && maybe == NULL)
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maybe = pr;
}
return (maybe);
}
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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/*
* The caller must make sure that the new protocol is fully set up and ready to
* accept requests before it is registered.
*/
int
pf_proto_register(int family, struct protosw *npr)
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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{
VNET_ITERATOR_DECL(vnet_iter);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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struct domain *dp;
struct protosw *pr, *fpr;
/* Sanity checks. */
if (family == 0)
return (EPFNOSUPPORT);
if (npr->pr_type == 0)
return (EPROTOTYPE);
if (npr->pr_protocol == 0)
return (EPROTONOSUPPORT);
if (npr->pr_usrreqs == NULL)
return (ENXIO);
/* Try to find the specified domain based on the family. */
dp = pffinddomain(family);
if (dp == NULL)
return (EPFNOSUPPORT);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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/* Initialize backpointer to struct domain. */
npr->pr_domain = dp;
fpr = NULL;
/*
* Protect us against races when two protocol registrations for
* the same protocol happen at the same time.
*/
mtx_lock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
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/* The new protocol must not yet exist. */
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if ((pr->pr_type == npr->pr_type) &&
(pr->pr_protocol == npr->pr_protocol)) {
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (EEXIST); /* XXX: Check only protocol? */
}
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
/* While here, remember the first free spacer. */
if ((fpr == NULL) && (pr->pr_protocol == PROTO_SPACER))
fpr = pr;
}
/* If no free spacer is found we can't add the new protocol. */
if (fpr == NULL) {
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (ENOMEM);
}
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
/* Copy the new struct protosw over the spacer. */
bcopy(npr, fpr, sizeof(*fpr));
/* Job is done, no more protection required. */
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
/* Initialize and activate the protocol. */
VNET_LIST_RLOCK();
VNET_FOREACH(vnet_iter) {
CURVNET_SET_QUIET(vnet_iter);
protosw_init(fpr);
CURVNET_RESTORE();
}
VNET_LIST_RUNLOCK();
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (0);
}
/*
* The caller must make sure the protocol and its functions correctly shut down
* all sockets and release all locks and memory references.
*/
int
pf_proto_unregister(int family, int protocol, int type)
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
{
struct domain *dp;
struct protosw *pr, *dpr;
/* Sanity checks. */
if (family == 0)
return (EPFNOSUPPORT);
if (protocol == 0)
return (EPROTONOSUPPORT);
if (type == 0)
return (EPROTOTYPE);
/* Try to find the specified domain based on the family type. */
dp = pffinddomain(family);
if (dp == NULL)
return (EPFNOSUPPORT);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
dpr = NULL;
/* Lock out everyone else while we are manipulating the protosw. */
mtx_lock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
/* The protocol must exist and only once. */
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if ((pr->pr_type == type) && (pr->pr_protocol == protocol)) {
if (dpr != NULL) {
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (EMLINK); /* Should not happen! */
} else
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
dpr = pr;
}
}
/* Protocol does not exist. */
if (dpr == NULL) {
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (EPROTONOSUPPORT);
}
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
/* De-orbit the protocol and make the slot available again. */
dpr->pr_type = 0;
dpr->pr_domain = dp;
dpr->pr_protocol = PROTO_SPACER;
dpr->pr_flags = 0;
dpr->pr_input = NULL;
dpr->pr_output = NULL;
dpr->pr_ctlinput = NULL;
dpr->pr_ctloutput = NULL;
dpr->pr_init = NULL;
dpr->pr_fasttimo = NULL;
dpr->pr_slowtimo = NULL;
dpr->pr_drain = NULL;
dpr->pr_usrreqs = &nousrreqs;
/* Job is done, not more protection required. */
mtx_unlock(&dom_mtx);
Support for dynamically loadable and unloadable protocols within existing protocol families. The protosw[] array of any particular protocol family ("domain") is of fixed size defined at compile time. This made it impossible to dynamically add or remove any protocols to or from it. We work around this by introducing so called SPACER's which are embedded into the protosw[] array at compile time. The SPACER's have a special protocol number (32767) to indicate the fact that they are SPACER's but are otherwise NULL. Only as many protocols can be dynamically loaded as SPACER's are provided in the protosw[] structure. The pr_usrreqs structure is treated more special and contains pointers to dummy functions only returning EOPNOTSUPP. This is needed because the use of those functions pointers is usually not checked within the kernel because until now it was assumed to be a valid function pointer. Instead of fixing all potential callers we just return a proper error code. Two new functions provide a clean API to register and unregister a protocol. The register function expects a pointer to a valid and complete struct protosw including a pointer to struct pru_usrreqs provided by the caller. Upon successful registration the pr_init() function will be called to finish initialization of the protocol. The unregister function restores the SPACER in place of the protocol again. It is the responseability of the caller to ensure proper closing of all sockets and freeing of memory allocation by the unloading protocol. sys/protosw.h o Define generic PROTO_SPACER to be 32767 o Prototypes for all pru_*_notsupp() functions o Prototypes for pf_proto_[un]register() functions kern/uipc_domain.c o Global struct pr_usrreqs nousrreqs containing valid pointers to the pru_*_notsupp() functions o New functions pf_proto_[un]register() kern/uipc_socket2.c o New functions bodies for all pru_*_notsupp() functions
2004-10-19 15:13:30 +00:00
return (0);
}
void
pfctlinput(int cmd, struct sockaddr *sa)
1994-05-24 10:09:53 +00:00
{
struct domain *dp;
struct protosw *pr;
1994-05-24 10:09:53 +00:00
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_ctlinput)
(*pr->pr_ctlinput)(cmd, sa, (void *)0);
1994-05-24 10:09:53 +00:00
}
void
pfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
{
struct domain *dp;
struct protosw *pr;
if (!sa)
return;
for (dp = domains; dp; dp = dp->dom_next) {
/*
* the check must be made by xx_ctlinput() anyways, to
* make sure we use data item pointed to by ctlparam in
* correct way. the following check is made just for safety.
*/
if (dp->dom_family != sa->sa_family)
continue;
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_ctlinput)
(*pr->pr_ctlinput)(cmd, sa, ctlparam);
}
}
1995-11-16 19:00:27 +00:00
static void
pfslowtimo(void *arg)
1994-05-24 10:09:53 +00:00
{
struct domain *dp;
struct protosw *pr;
1994-05-24 10:09:53 +00:00
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_slowtimo)
(*pr->pr_slowtimo)();
callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
1994-05-24 10:09:53 +00:00
}
1995-11-16 19:00:27 +00:00
static void
pffasttimo(void *arg)
1994-05-24 10:09:53 +00:00
{
struct domain *dp;
struct protosw *pr;
1994-05-24 10:09:53 +00:00
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_fasttimo)
(*pr->pr_fasttimo)();
callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
1994-05-24 10:09:53 +00:00
}