51369649b0
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
278 lines
6.3 KiB
C
278 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 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
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/protosw.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/vnet.h>
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#include <net/raw_cb.h>
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MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
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/*
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* Initialize raw connection block q.
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*/
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void
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raw_init(void)
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{
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LIST_INIT(&V_rawcb_list);
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}
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/*
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* Raw protocol input routine. Find the socket associated with the packet(s)
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* and move them over. If nothing exists for this packet, drop it.
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*/
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/*
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* Raw protocol interface.
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*/
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void
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raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
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{
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return (raw_input_ext(m0, proto, src, NULL));
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}
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void
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raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src,
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raw_input_cb_fn cb)
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{
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struct rawcb *rp;
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struct mbuf *m = m0;
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struct socket *last;
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last = NULL;
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mtx_lock(&rawcb_mtx);
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LIST_FOREACH(rp, &V_rawcb_list, list) {
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if (rp->rcb_proto.sp_family != proto->sp_family)
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continue;
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if (rp->rcb_proto.sp_protocol &&
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rp->rcb_proto.sp_protocol != proto->sp_protocol)
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continue;
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if (cb != NULL && (*cb)(m, proto, src, rp) != 0)
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continue;
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if (last) {
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struct mbuf *n;
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n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
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if (n) {
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if (sbappendaddr(&last->so_rcv, src,
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n, (struct mbuf *)0) == 0)
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/* should notify about lost packet */
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m_freem(n);
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else
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sorwakeup(last);
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}
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}
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last = rp->rcb_socket;
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}
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if (last) {
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if (sbappendaddr(&last->so_rcv, src,
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m, (struct mbuf *)0) == 0)
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m_freem(m);
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else
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sorwakeup(last);
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} else
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m_freem(m);
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mtx_unlock(&rawcb_mtx);
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}
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/*ARGSUSED*/
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void
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raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
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{
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if (cmd < 0 || cmd >= PRC_NCMDS)
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return;
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/* INCOMPLETE */
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}
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static void
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raw_uabort(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
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soisdisconnected(so);
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}
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static void
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raw_uclose(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
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soisdisconnected(so);
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}
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/* pru_accept is EOPNOTSUPP */
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static int
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raw_uattach(struct socket *so, int proto, struct thread *td)
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{
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int error;
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/*
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* Implementors of raw sockets will already have allocated the PCB,
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* so it must be non-NULL here.
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*/
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KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
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if (td != NULL) {
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error = priv_check(td, PRIV_NET_RAW);
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if (error)
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return (error);
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}
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return (raw_attach(so, proto));
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}
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static int
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raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
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{
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return (EINVAL);
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}
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static int
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raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
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{
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return (EINVAL);
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}
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/* pru_connect2 is EOPNOTSUPP */
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/* pru_control is EOPNOTSUPP */
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static void
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raw_udetach(struct socket *so)
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{
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struct rawcb *rp = sotorawcb(so);
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KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
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raw_detach(rp);
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}
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static int
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raw_udisconnect(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
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return (ENOTCONN);
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}
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/* pru_listen is EOPNOTSUPP */
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static int
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raw_upeeraddr(struct socket *so, struct sockaddr **nam)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
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return (ENOTCONN);
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}
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/* pru_rcvd is EOPNOTSUPP */
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/* pru_rcvoob is EOPNOTSUPP */
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static int
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raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
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struct mbuf *control, struct thread *td)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
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if ((flags & PRUS_OOB) || (control && control->m_len)) {
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if (m != NULL)
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m_freem(m);
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if (control != NULL)
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m_freem(control);
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return (EOPNOTSUPP);
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}
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/*
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* For historical (bad?) reasons, we effectively ignore the address
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* argument to sendto(2). Perhaps we should return an error instead?
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*/
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return ((*so->so_proto->pr_output)(m, so));
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}
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/* pru_sense is null */
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static int
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raw_ushutdown(struct socket *so)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
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socantsendmore(so);
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return (0);
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}
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static int
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raw_usockaddr(struct socket *so, struct sockaddr **nam)
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{
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KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
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return (EINVAL);
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}
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struct pr_usrreqs raw_usrreqs = {
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.pru_abort = raw_uabort,
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.pru_attach = raw_uattach,
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.pru_bind = raw_ubind,
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.pru_connect = raw_uconnect,
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.pru_detach = raw_udetach,
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.pru_disconnect = raw_udisconnect,
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.pru_peeraddr = raw_upeeraddr,
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.pru_send = raw_usend,
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.pru_shutdown = raw_ushutdown,
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.pru_sockaddr = raw_usockaddr,
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.pru_close = raw_uclose,
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};
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