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/* $OpenBSD: ip_gre.c,v 1.88 2024/07/13 13:20:44 bluhm Exp $ */
/* $NetBSD: ip_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Heiko W.Rupp <hwr@pilhuhn.de>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* decapsulate tunneled packets and send them on
* output half is in net/if_gre.[ch]
* This currently handles IPPROTO_GRE, IPPROTO_MOBILE
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_gre.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#ifdef PIPEX
#include <net/pipex.h>
#endif
const struct pr_usrreqs gre_usrreqs = {
.pru_attach = rip_attach,
.pru_detach = rip_detach,
.pru_bind = rip_bind,
.pru_connect = rip_connect,
.pru_disconnect = rip_disconnect,
.pru_shutdown = rip_shutdown,
.pru_send = gre_send,
.pru_control = in_control,
.pru_sockaddr = in_sockaddr,
.pru_peeraddr = in_peeraddr,
};
int
gre_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
struct mbuf *control)
{
#ifdef PIPEX
struct inpcb *inp = sotoinpcb(so);
if (inp->inp_pipex) {
struct sockaddr_in *sin4;
const struct in_addr *ina_dst;
ina_dst = NULL;
if ((so->so_state & SS_ISCONNECTED) != 0)
ina_dst = &inp->inp_laddr;
else if (nam) {
if (in_nam2sin(nam, &sin4) == 0)
ina_dst = &sin4->sin_addr;
}
if (ina_dst != NULL) {
struct pipex_session *session;
session = pipex_pptp_userland_lookup_session_ipv4(m,
*ina_dst);
if(session != NULL) {
m = pipex_pptp_userland_output(m, session);
pipex_rele_session(session);
}
}
if (m == NULL) {
m_freem(control);
return (ENOMEM);
}
}
#endif
return rip_send(so, m, nam, control);
}
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