119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/* $OpenBSD: ip_gre.c,v 1.87 2023/12/15 00:24:56 bluhm Exp $ */
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/* $NetBSD: ip_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Heiko W.Rupp <hwr@pilhuhn.de>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* decapsulate tunneled packets and send them on
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* output half is in net/if_gre.[ch]
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* This currently handles IPPROTO_GRE, IPPROTO_MOBILE
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*/
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#include "gre.h"
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#if NGRE > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip_gre.h>
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#include <netinet/ip_var.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_var.h>
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#ifdef PIPEX
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#include <net/pipex.h>
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#endif
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const struct pr_usrreqs gre_usrreqs = {
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.pru_attach = rip_attach,
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.pru_detach = rip_detach,
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.pru_bind = rip_bind,
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.pru_connect = rip_connect,
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.pru_disconnect = rip_disconnect,
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.pru_shutdown = rip_shutdown,
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.pru_send = gre_send,
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.pru_control = in_control,
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.pru_sockaddr = in_sockaddr,
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.pru_peeraddr = in_peeraddr,
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};
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int
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gre_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
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struct mbuf *control)
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{
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#ifdef PIPEX
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struct inpcb *inp = sotoinpcb(so);
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if (inp->inp_pipex) {
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struct sockaddr_in *sin4;
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const struct in_addr *ina_dst;
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ina_dst = NULL;
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if ((so->so_state & SS_ISCONNECTED) != 0)
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ina_dst = &inp->inp_laddr;
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else if (nam) {
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if (in_nam2sin(nam, &sin4) == 0)
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ina_dst = &sin4->sin_addr;
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}
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if (ina_dst != NULL) {
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struct pipex_session *session;
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session = pipex_pptp_userland_lookup_session_ipv4(m,
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*ina_dst);
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if(session != NULL) {
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m = pipex_pptp_userland_output(m, session);
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pipex_rele_session(session);
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}
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}
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if (m == NULL) {
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m_freem(control);
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return (ENOMEM);
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}
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}
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#endif
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return rip_send(so, m, nam, control);
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}
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#endif /* if NGRE > 0 */
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