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Retire 4.4BSD raw sockets

Browse source 
Until today the remnants of the original code had provided some aid
in implementation of routing socket and IPSEC key socket.  There were
more obfuscation rather than generalisation with this aid.

A historical reference on the original idea of the raw sockets can
be found in chapter 11 of 4.4BSD System Manager Manual:

https://raw.githubusercontent.com/sergev/4.4BSD-Lite2/master/usr/share/doc/smm/18.net.pdf

Reviewed by:		melifaro
Differential revision:	https://reviews.freebsd.org/D36124
This commit is contained in:
Gleb Smirnoff 2022-08-11 09:19:36 -07:00
parent ea7be1293b
commit f63cb32c19
5 changed files with 3 additions and 491 deletions
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3
ObsoleteFiles.inc
View file

@ -52,6 +52,9 @@
# xargs -n1 | sort | uniq -d;
# done
# 202208XX: raw socket layer removed
OLD_FILES+=usr/include/net/raw_cb.h
# 20220721: libnv version bumps
OLD_LIBS+=lib/libnv.so.0

2
sys/conf/files
View file

@ -4164,8 +4164,6 @@ net/debugnet.c optional inet debugnet
net/debugnet_inet.c optional inet debugnet
net/pfil.c optional ether | inet
net/radix.c standard
net/raw_cb.c standard
net/raw_usrreq.c standard
net/route.c standard
net/route/nhgrp.c optional route_mpath
net/route/nhgrp_ctl.c optional route_mpath

120
sys/net/raw_cb.c
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@ -1,120 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 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
* 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.
*
* @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/domain.h>
#include <sys/lock.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/vnet.h>
#include <net/raw_cb.h>
/*
* Routines to manage the raw protocol control blocks.
*
* TODO:
* hash lookups by protocol family/protocol + address family
* take care of unique address problems per AF?
* redo address binding to allow wildcards
*/
struct mtx rawcb_mtx;
VNET_DEFINE(struct rawcb_list_head, rawcb_list);
static SYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"Raw socket infrastructure");
static u_long raw_sendspace = RAWSNDQ;
SYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0,
"Default raw socket send space");
static u_long raw_recvspace = RAWRCVQ;
SYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0,
"Default raw socket receive space");
/*
* Allocate a control block and a nominal amount of buffer space for the
* socket.
*/
int
raw_attach(struct socket *so, int proto)
{
struct rawcb *rp = sotorawcb(so);
int error;
/*
* It is assumed that raw_attach is called after space has been
* allocated for the rawcb; consumer protocols may simply allocate
* type struct rawcb, or a wrapper data structure that begins with a
* struct rawcb.
*/
KASSERT(rp != NULL, ("raw_attach: rp == NULL"));
error = soreserve(so, raw_sendspace, raw_recvspace);
if (error)
return (error);
rp->rcb_socket = so;
rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
rp->rcb_proto.sp_protocol = proto;
mtx_lock(&rawcb_mtx);
LIST_INSERT_HEAD(&V_rawcb_list, rp, list);
mtx_unlock(&rawcb_mtx);
return (0);
}
/*
* Detach the raw connection block and discard socket resources.
*/
void
raw_detach(struct rawcb *rp)
{
struct socket *so = rp->rcb_socket;
KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp"));
so->so_pcb = NULL;
mtx_lock(&rawcb_mtx);
LIST_REMOVE(rp, list);
mtx_unlock(&rawcb_mtx);
free((caddr_t)(rp), M_PCB);
}

90
sys/net/raw_cb.h
View file

@ -1,90 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 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
* 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.
*
* @(#)raw_cb.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#ifndef _NET_RAW_CB_H_
#define _NET_RAW_CB_H_
#include <sys/queue.h>
/*
* Raw protocol interface control block. Used to tie a socket to the generic
* raw interface.
*/
struct rawcb {
LIST_ENTRY(rawcb) list;
struct socket *rcb_socket; /* back pointer to socket */
struct sockproto rcb_proto; /* protocol family, protocol */
};
#define sotorawcb(so) ((struct rawcb *)(so)->so_pcb)
/*
* Nominal space allocated to a raw socket.
*/
#define RAWSNDQ 8192
#define RAWRCVQ 8192
#ifdef _KERNEL
VNET_DECLARE(LIST_HEAD(rawcb_list_head, rawcb), rawcb_list);
#define V_rawcb_list VNET(rawcb_list)
extern struct mtx rawcb_mtx;
/*
* Generic protosw entries for raw socket protocols.
*/
pr_ctlinput_t raw_ctlinput;
/*
* Library routines for raw socket usrreq functions; will always be wrapped
* so that protocol-specific functions can be handled.
*/
typedef int (*raw_input_cb_fn)(struct mbuf *, struct sockproto *,
struct sockaddr *, struct rawcb *);
int raw_attach(struct socket *, int);
void raw_detach(struct rawcb *);
void raw_input(struct mbuf *, struct sockproto *, struct sockaddr *);
void raw_input_ext(struct mbuf *, struct sockproto *, struct sockaddr *,
raw_input_cb_fn);
/*
* Generic pr_usrreqs entries for raw socket protocols, usually wrapped so
* that protocol-specific functions can be handled.
*/
extern struct pr_usrreqs raw_usrreqs;
#endif
#endif

279
sys/net/raw_usrreq.c
View file

@ -1,279 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 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
* 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.
*
* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sx.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/vnet.h>
#include <net/raw_cb.h>
MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
/*
* Initialize raw connection block q.
*/
static void
raw_init(void *arg __unused)
{
LIST_INIT(&V_rawcb_list);
}
VNET_SYSINIT(raw_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, raw_init, NULL);
/*
* Raw protocol input routine. Find the socket associated with the packet(s)
* and move them over. If nothing exists for this packet, drop it.
*/
/*
* Raw protocol interface.
*/
void
raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
{
return (raw_input_ext(m0, proto, src, NULL));
}
void
raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src,
raw_input_cb_fn cb)
{
struct rawcb *rp;
struct mbuf *m = m0;
struct socket *last;
last = NULL;
mtx_lock(&rawcb_mtx);
LIST_FOREACH(rp, &V_rawcb_list, list) {
if (rp->rcb_proto.sp_family != proto->sp_family)
continue;
if (rp->rcb_proto.sp_protocol &&
rp->rcb_proto.sp_protocol != proto->sp_protocol)
continue;
if (cb != NULL && (*cb)(m, proto, src, rp) != 0)
continue;
if (last) {
struct mbuf *n;
n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
if (n) {
if (sbappendaddr(&last->so_rcv, src,
n, (struct mbuf *)0) == 0) {
soroverflow(last);
m_freem(n);
} else
sorwakeup(last);
}
}
last = rp->rcb_socket;
}
if (last) {
if (sbappendaddr(&last->so_rcv, src,
m, (struct mbuf *)0) == 0) {
soroverflow(last);
m_freem(m);
} else
sorwakeup(last);
} else
m_freem(m);
mtx_unlock(&rawcb_mtx);
}
/*ARGSUSED*/
void
raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
{
if (cmd < 0 || cmd >= PRC_NCMDS)
return;
/* INCOMPLETE */
}
static void
raw_uabort(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
soisdisconnected(so);
}
static void
raw_uclose(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
soisdisconnected(so);
}
/* pru_accept is EOPNOTSUPP */
static int
raw_uattach(struct socket *so, int proto, struct thread *td)
{
int error;
/*
* Implementors of raw sockets will already have allocated the PCB,
* so it must be non-NULL here.
*/
KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
if (td != NULL) {
error = priv_check(td, PRIV_NET_RAW);
if (error)
return (error);
}
return (raw_attach(so, proto));
}
static int
raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
{
return (EINVAL);
}
static int
raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
{
return (EINVAL);
}
/* pru_connect2 is EOPNOTSUPP */
/* pru_control is EOPNOTSUPP */
static void
raw_udetach(struct socket *so)
{
struct rawcb *rp = sotorawcb(so);
KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
raw_detach(rp);
}
static int
raw_udisconnect(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
return (ENOTCONN);
}
/* pru_listen is EOPNOTSUPP */
static int
raw_upeeraddr(struct socket *so, struct sockaddr **nam)
{
KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
return (ENOTCONN);
}
/* pru_rcvd is EOPNOTSUPP */
/* pru_rcvoob is EOPNOTSUPP */
static int
raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct thread *td)
{
KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
if ((flags & PRUS_OOB) || (control && control->m_len)) {
if (m != NULL)
m_freem(m);
if (control != NULL)
m_freem(control);
return (EOPNOTSUPP);
}
/*
* For historical (bad?) reasons, we effectively ignore the address
* argument to sendto(2). Perhaps we should return an error instead?
*/
return ((*so->so_proto->pr_output)(m, so));
}
/* pru_sense is null */
static int
raw_ushutdown(struct socket *so)
{
KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
socantsendmore(so);
return (0);
}
static int
raw_usockaddr(struct socket *so, struct sockaddr **nam)
{
KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
return (EINVAL);
}
struct pr_usrreqs raw_usrreqs = {
.pru_abort = raw_uabort,
.pru_attach = raw_uattach,
.pru_bind = raw_ubind,
.pru_connect = raw_uconnect,
.pru_detach = raw_udetach,
.pru_disconnect = raw_udisconnect,
.pru_peeraddr = raw_upeeraddr,
.pru_send = raw_usend,
.pru_shutdown = raw_ushutdown,
.pru_sockaddr = raw_usockaddr,
.pru_close = raw_uclose,
};