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freebsd-skq/sys/net/if_enc.c

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Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
/*-
sys: general adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. 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. No functional change intended.
2017-11-27 15:23:17 +00:00
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
* Copyright (c) 2006 The FreeBSD Project.
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
* Copyright (c) 2015 Andrey V. Elsukov <ae@FreeBSD.org>
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
Make various (pseudo) interfaces compile without INET in the kernel adding appropriate #ifdefs. For module builds the framework needs adjustments for at least carp. Reviewed by: gnn Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems MFC after: 4 days
2011-04-27 19:30:44 +00:00
#include "opt_inet.h"
#include "opt_inet6.h"
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#include <sys/param.h>
#include <sys/systm.h>
Fix building sys/modules/if_enc by adding missing headers X-MFC with: r291292, r291299 (if that ever happens) Pointyhat to: ae
2015-11-25 21:16:10 +00:00
#include <sys/hhook.h>
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/if.h>
Fix building sys/modules/if_enc by adding missing headers X-MFC with: r291292, r291299 (if that ever happens) Pointyhat to: ae
2015-11-25 21:16:10 +00:00
#include <net/if_enc.h>
The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare to this event, adding if_var.h to files that do need it. Also, include all includes that now are included due to implicit pollution via if_var.h Sponsored by: Netflix Sponsored by: Nginx, Inc.
2013-10-26 17:58:36 +00:00
#include <net/if_var.h>
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#include <net/if_clone.h>
#include <net/if_types.h>
#include <net/pfil.h>
#include <net/route.h>
#include <net/netisr.h>
#include <net/bpf.h>
Build on Jeff Roberson's linker-set based dynamic per-CPU allocator (DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
2009-07-14 22:48:30 +00:00
#include <net/vnet.h>
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_var.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif
#include <netipsec/ipsec.h>
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
#include <netipsec/xform.h>
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#define ENCMTU (1024+512)
/* XXX this define must have the same value as in OpenBSD */
#define M_CONF 0x0400 /* payload was encrypted (ESP-transport) */
#define M_AUTH 0x0800 /* payload was authenticated (AH or ESP auth) */
#define M_AUTH_AH 0x2000 /* header was authenticated (AH) */
struct enchdr {
u_int32_t af;
u_int32_t spi;
u_int32_t flags;
};
struct enc_softc {
struct ifnet *sc_ifp;
};
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static VNET_DEFINE(struct enc_softc *, enc_sc);
#define V_enc_sc VNET(enc_sc)
static VNET_DEFINE(struct if_clone *, enc_cloner);
#define V_enc_cloner VNET(enc_cloner)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
static int enc_ioctl(struct ifnet *, u_long, caddr_t);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static int enc_output(struct ifnet *, struct mbuf *,
const struct sockaddr *, struct route *);
Catch up with the revised network interface cloning which takes an optional opaque parameter that can specify configuration parameters.
2006-07-10 05:24:06 +00:00
static int enc_clone_create(struct if_clone *, int, caddr_t);
Fix a braino in the last revision, enc_clone_destroy needs return void instead of int. The clone system will ensure that our first interface is not destroyed so we dont need the extra checking anyway. Tested by: Scott Ullrich
2006-07-04 23:09:11 +00:00
static void enc_clone_destroy(struct ifnet *);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static int enc_add_hhooks(struct enc_softc *);
static void enc_remove_hhooks(struct enc_softc *);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static const char encname[] = "enc";
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
Add to if_enc(4) ability to capture packets via BPF after pfil processing. New flag 0x4 can be configured in net.enc.[in|out].ipsec_bpf_mask. When it is set, if_enc(4) additionally captures a packet via BPF after invoking pfil hook. This may be useful for debugging. MFC after: 2 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D11804
2017-08-09 12:24:07 +00:00
#define IPSEC_ENC_AFTER_PFIL 0x04
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
/*
* Before and after are relative to when we are stripping the
* outer IP header.
Add to if_enc(4) ability to capture packets via BPF after pfil processing. New flag 0x4 can be configured in net.enc.[in|out].ipsec_bpf_mask. When it is set, if_enc(4) additionally captures a packet via BPF after invoking pfil hook. This may be useful for debugging. MFC after: 2 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D11804
2017-08-09 12:24:07 +00:00
*
* AFTER_PFIL flag used only for bpf_mask_*. It enables BPF capturing
* after PFIL hook execution. It might be useful when PFIL hook does
* some changes to the packet, e.g. address translation. If PFIL hook
* consumes mbuf, nothing will be captured.
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
*/
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static VNET_DEFINE(int, filter_mask_in) = IPSEC_ENC_BEFORE;
static VNET_DEFINE(int, bpf_mask_in) = IPSEC_ENC_BEFORE;
static VNET_DEFINE(int, filter_mask_out) = IPSEC_ENC_BEFORE;
static VNET_DEFINE(int, bpf_mask_out) = IPSEC_ENC_BEFORE | IPSEC_ENC_AFTER;
#define V_filter_mask_in VNET(filter_mask_in)
#define V_bpf_mask_in VNET(bpf_mask_in)
#define V_filter_mask_out VNET(filter_mask_out)
#define V_bpf_mask_out VNET(bpf_mask_out)
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static SYSCTL_NODE(_net, OID_AUTO, enc, CTLFLAG_RW, 0, "enc sysctl");
Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. The SYSCTL_NODE macro defines a list that stores all child-elements of that node. If there's no SYSCTL_DECL macro anywhere else, there's no reason why it shouldn't be static.
2011-11-07 15:43:11 +00:00
static SYSCTL_NODE(_net_enc, OID_AUTO, in, CTLFLAG_RW, 0, "enc input sysctl");
static SYSCTL_NODE(_net_enc, OID_AUTO, out, CTLFLAG_RW, 0, "enc output sysctl");
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
SYSCTL_INT(_net_enc_in, OID_AUTO, ipsec_filter_mask,
CTLFLAG_RW | CTLFLAG_VNET, &VNET_NAME(filter_mask_in), 0,
"IPsec input firewall filter mask");
SYSCTL_INT(_net_enc_in, OID_AUTO, ipsec_bpf_mask,
CTLFLAG_RW | CTLFLAG_VNET, &VNET_NAME(bpf_mask_in), 0,
"IPsec input bpf mask");
SYSCTL_INT(_net_enc_out, OID_AUTO, ipsec_filter_mask,
CTLFLAG_RW | CTLFLAG_VNET, &VNET_NAME(filter_mask_out), 0,
"IPsec output firewall filter mask");
SYSCTL_INT(_net_enc_out, OID_AUTO, ipsec_bpf_mask,
CTLFLAG_RW | CTLFLAG_VNET, &VNET_NAME(bpf_mask_out), 0,
"IPsec output bpf mask");
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
Fix a braino in the last revision, enc_clone_destroy needs return void instead of int. The clone system will ensure that our first interface is not destroyed so we dont need the extra checking anyway. Tested by: Scott Ullrich
2006-07-04 23:09:11 +00:00
static void
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
enc_clone_destroy(struct ifnet *ifp)
{
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
struct enc_softc *sc;
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
sc = ifp->if_softc;
KASSERT(sc == V_enc_sc, ("sc != ifp->if_softc"));
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
bpfdetach(ifp);
if_detach(ifp);
if_free(ifp);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
free(sc, M_DEVBUF);
V_enc_sc = NULL;
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
static int
Catch up with the revised network interface cloning which takes an optional opaque parameter that can specify configuration parameters.
2006-07-10 05:24:06 +00:00
enc_clone_create(struct if_clone *ifc, int unit, caddr_t params)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
{
struct ifnet *ifp;
struct enc_softc *sc;
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
sc = malloc(sizeof(struct enc_softc), M_DEVBUF,
M_WAITOK | M_ZERO);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
ifp = sc->sc_ifp = if_alloc(IFT_ENC);
if (ifp == NULL) {
free(sc, M_DEVBUF);
return (ENOSPC);
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
if (V_enc_sc != NULL) {
if_free(ifp);
free(sc, M_DEVBUF);
return (EEXIST);
}
V_enc_sc = sc;
Make the "struct if_clone" opaque to users of the cloning API. Users now use function calls: if_clone_simple() if_clone_advanced() to initialize a cloner, instead of macros that initialize if_clone structure. Discussed with: brooks, bz, 1 year ago
2012-10-16 13:37:54 +00:00
if_initname(ifp, encname, unit);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
ifp->if_mtu = ENCMTU;
ifp->if_ioctl = enc_ioctl;
ifp->if_output = enc_output;
ifp->if_softc = sc;
if_attach(ifp);
Simplify ipsec_bpf by using bpf_mtap2().
2006-06-27 01:53:12 +00:00
bpfattach(ifp, DLT_ENC, sizeof(struct enchdr));
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
return (0);
}
static int
Add const qualifier to the dst parameter of the ifnet if_output method.
2013-04-26 12:50:32 +00:00
enc_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
Change if_output to take a struct route as its fourth argument in order to allow passing a cached struct llentry * down to L2 Reviewed by: rwatson
2009-04-16 20:30:28 +00:00
struct route *ro)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
{
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
m_freem(m);
return (0);
}
static int
enc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
A small race existed where the lock was dropped between when encif was tested and then set. [1] Reorganise things to eliminate this, we now ensure that enc0 can not be destroyed which as the benefit of no longer needing to lock in ipsec_filter and ipsec_bpf. The cloner will create one interface during the init so we can guarantee that encif will be valid before any SPD entries are added to ipsec. Spotted by: glebius [1]
2006-06-28 21:57:35 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
if (cmd != SIOCSIFFLAGS)
return (EINVAL);
if (ifp->if_flags & IFF_UP)
ifp->if_drv_flags |= IFF_DRV_RUNNING;
else
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
return (0);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
Add to if_enc(4) ability to capture packets via BPF after pfil processing. New flag 0x4 can be configured in net.enc.[in|out].ipsec_bpf_mask. When it is set, if_enc(4) additionally captures a packet via BPF after invoking pfil hook. This may be useful for debugging. MFC after: 2 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D11804
2017-08-09 12:24:07 +00:00
static void
enc_bpftap(struct ifnet *ifp, struct mbuf *m, const struct secasvar *sav,
int32_t hhook_type, uint8_t enc, uint8_t af)
{
struct enchdr hdr;
if (hhook_type == HHOOK_TYPE_IPSEC_IN &&
(enc & V_bpf_mask_in) == 0)
return;
else if (hhook_type == HHOOK_TYPE_IPSEC_OUT &&
(enc & V_bpf_mask_out) == 0)
return;
if (bpf_peers_present(ifp->if_bpf) == 0)
return;
hdr.af = af;
hdr.spi = sav->spi;
hdr.flags = 0;
if (sav->alg_enc != SADB_EALG_NONE)
hdr.flags |= M_CONF;
if (sav->alg_auth != SADB_AALG_NONE)
hdr.flags |= M_AUTH;
bpf_mtap2(ifp->if_bpf, &hdr, sizeof(hdr), m);
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
/*
* One helper hook function is used by any hook points.
* + from hhook_type we can determine the packet direction:
* HHOOK_TYPE_IPSEC_IN or HHOOK_TYPE_IPSEC_OUT;
* + from hhook_id we can determine address family: AF_INET or AF_INET6;
* + udata contains pointer to enc_softc;
* + ctx_data contains pointer to struct ipsec_ctx_data.
*/
static int
enc_hhook(int32_t hhook_type, int32_t hhook_id, void *udata, void *ctx_data,
void *hdata, struct osd *hosd)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
{
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
struct ipsec_ctx_data *ctx;
struct enc_softc *sc;
struct ifnet *ifp, *rcvif;
struct pfil_head *ph;
int pdir;
A small race existed where the lock was dropped between when encif was tested and then set. [1] Reorganise things to eliminate this, we now ensure that enc0 can not be destroyed which as the benefit of no longer needing to lock in ipsec_filter and ipsec_bpf. The cloner will create one interface during the init so we can guarantee that encif will be valid before any SPD entries are added to ipsec. Spotted by: glebius [1]
2006-06-28 21:57:35 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
sc = (struct enc_softc *)udata;
ifp = sc->sc_ifp;
if ((ifp->if_flags & IFF_UP) == 0)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
return (0);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
ctx = (struct ipsec_ctx_data *)ctx_data;
/* XXX: wrong hook point was used by caller? */
if (ctx->af != hhook_id)
return (EPFNOSUPPORT);
Add to if_enc(4) ability to capture packets via BPF after pfil processing. New flag 0x4 can be configured in net.enc.[in|out].ipsec_bpf_mask. When it is set, if_enc(4) additionally captures a packet via BPF after invoking pfil hook. This may be useful for debugging. MFC after: 2 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D11804
2017-08-09 12:24:07 +00:00
enc_bpftap(ifp, *ctx->mp, ctx->sav, hhook_type, ctx->enc, ctx->af);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
switch (hhook_type) {
case HHOOK_TYPE_IPSEC_IN:
if (ctx->enc == IPSEC_ENC_BEFORE) {
/* Do accounting only once */
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_IBYTES,
(*ctx->mp)->m_pkthdr.len);
}
if ((ctx->enc & V_filter_mask_in) == 0)
return (0); /* skip pfil processing */
pdir = PFIL_IN;
break;
case HHOOK_TYPE_IPSEC_OUT:
if (ctx->enc == IPSEC_ENC_BEFORE) {
/* Do accounting only once */
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_OBYTES,
(*ctx->mp)->m_pkthdr.len);
}
if ((ctx->enc & V_filter_mask_out) == 0)
return (0); /* skip pfil processing */
pdir = PFIL_OUT;
break;
default:
return (EINVAL);
}
switch (hhook_id) {
Make various (pseudo) interfaces compile without INET in the kernel adding appropriate #ifdefs. For module builds the framework needs adjustments for at least carp. Reviewed by: gnn Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems MFC after: 4 days
2011-04-27 19:30:44 +00:00
#ifdef INET
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
case AF_INET:
ph = &V_inet_pfil_hook;
break;
Make various (pseudo) interfaces compile without INET in the kernel adding appropriate #ifdefs. For module builds the framework needs adjustments for at least carp. Reviewed by: gnn Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems MFC after: 4 days
2011-04-27 19:30:44 +00:00
#endif
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#ifdef INET6
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
case AF_INET6:
ph = &V_inet6_pfil_hook;
break;
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#endif
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
default:
ph = NULL;
}
if (ph == NULL || !PFIL_HOOKED(ph))
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
return (0);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
/* Make a packet looks like it was received on enc(4) */
rcvif = (*ctx->mp)->m_pkthdr.rcvif;
(*ctx->mp)->m_pkthdr.rcvif = ifp;
netpfil: Introduce PFIL_FWD flag Forwarded packets passed through PFIL_OUT, which made it difficult for firewalls to figure out if they were forwarding or producing packets. This in turn is an issue for pf for IPv6 fragment handling: it needs to call ip6_output() or ip6_forward() to handle the fragments. Figuring out which was difficult (and until now, incorrect). Having pfil distinguish the two removes an ugly piece of code from pf. Introduce a new variant of the netpfil callbacks with a flags variable, which has PFIL_FWD set for forwarded packets. This allows pf to reliably work out if a packet is forwarded. Reviewed by: ae, kevans Differential Revision: https://reviews.freebsd.org/D13715
2018-03-23 16:56:44 +00:00
if (pfil_run_hooks(ph, ctx->mp, ifp, pdir, 0, ctx->inp) != 0 ||
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
*ctx->mp == NULL) {
*ctx->mp = NULL; /* consumed by filter */
return (EACCES);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
(*ctx->mp)->m_pkthdr.rcvif = rcvif;
Add to if_enc(4) ability to capture packets via BPF after pfil processing. New flag 0x4 can be configured in net.enc.[in|out].ipsec_bpf_mask. When it is set, if_enc(4) additionally captures a packet via BPF after invoking pfil hook. This may be useful for debugging. MFC after: 2 weeks Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D11804
2017-08-09 12:24:07 +00:00
enc_bpftap(ifp, *ctx->mp, ctx->sav, hhook_type,
IPSEC_ENC_AFTER_PFIL, ctx->af);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
return (0);
}
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static int
enc_add_hhooks(struct enc_softc *sc)
{
struct hookinfo hki;
int error;
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
error = EPFNOSUPPORT;
hki.hook_func = enc_hhook;
hki.hook_helper = NULL;
hki.hook_udata = sc;
Make various (pseudo) interfaces compile without INET in the kernel adding appropriate #ifdefs. For module builds the framework needs adjustments for at least carp. Reviewed by: gnn Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems MFC after: 4 days
2011-04-27 19:30:44 +00:00
#ifdef INET
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
hki.hook_id = AF_INET;
hki.hook_type = HHOOK_TYPE_IPSEC_IN;
error = hhook_add_hook(V_ipsec_hhh_in[HHOOK_IPSEC_INET],
&hki, HHOOK_WAITOK);
if (error != 0)
return (error);
hki.hook_type = HHOOK_TYPE_IPSEC_OUT;
error = hhook_add_hook(V_ipsec_hhh_out[HHOOK_IPSEC_INET],
&hki, HHOOK_WAITOK);
if (error != 0)
return (error);
Make various (pseudo) interfaces compile without INET in the kernel adding appropriate #ifdefs. For module builds the framework needs adjustments for at least carp. Reviewed by: gnn Sponsored by: The FreeBSD Foundation Sponsored by: iXsystems MFC after: 4 days
2011-04-27 19:30:44 +00:00
#endif
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
#ifdef INET6
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
hki.hook_id = AF_INET6;
hki.hook_type = HHOOK_TYPE_IPSEC_IN;
error = hhook_add_hook(V_ipsec_hhh_in[HHOOK_IPSEC_INET6],
&hki, HHOOK_WAITOK);
if (error != 0)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
return (error);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
hki.hook_type = HHOOK_TYPE_IPSEC_OUT;
error = hhook_add_hook(V_ipsec_hhh_out[HHOOK_IPSEC_INET6],
&hki, HHOOK_WAITOK);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
if (error != 0)
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
return (error);
#endif
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
return (error);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
}
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static void
enc_remove_hhooks(struct enc_softc *sc)
{
struct hookinfo hki;
hki.hook_func = enc_hhook;
hki.hook_helper = NULL;
hki.hook_udata = sc;
#ifdef INET
hki.hook_id = AF_INET;
hki.hook_type = HHOOK_TYPE_IPSEC_IN;
hhook_remove_hook(V_ipsec_hhh_in[HHOOK_IPSEC_INET], &hki);
hki.hook_type = HHOOK_TYPE_IPSEC_OUT;
hhook_remove_hook(V_ipsec_hhh_out[HHOOK_IPSEC_INET], &hki);
#endif
#ifdef INET6
hki.hook_id = AF_INET6;
hki.hook_type = HHOOK_TYPE_IPSEC_IN;
hhook_remove_hook(V_ipsec_hhh_in[HHOOK_IPSEC_INET6], &hki);
hki.hook_type = HHOOK_TYPE_IPSEC_OUT;
hhook_remove_hook(V_ipsec_hhh_out[HHOOK_IPSEC_INET6], &hki);
#endif
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static void
vnet_enc_init(const void *unused __unused)
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
{
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
V_enc_sc = NULL;
V_enc_cloner = if_clone_simple(encname, enc_clone_create,
enc_clone_destroy, 1);
}
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
VNET_SYSINIT(vnet_enc_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
vnet_enc_init, NULL);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
static void
vnet_enc_init_proto(void *unused __unused)
{
KASSERT(V_enc_sc != NULL, ("%s: V_enc_sc is %p\n", __func__, V_enc_sc));
if (enc_add_hhooks(V_enc_sc) != 0)
enc_clone_destroy(V_enc_sc->sc_ifp);
}
VNET_SYSINIT(vnet_enc_init_proto, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
vnet_enc_init_proto, NULL);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static void
vnet_enc_uninit(const void *unused __unused)
{
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
KASSERT(V_enc_sc != NULL, ("%s: V_enc_sc is %p\n", __func__, V_enc_sc));
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
if_clone_detach(V_enc_cloner);
}
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
VNET_SYSUNINIT(vnet_enc_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
vnet_enc_uninit, NULL);
Add sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner or outer headers for incoming and outgoing IPsec packets. This is useful in bpf to not have over long lines for debugging or selcting packets based on the inner headers. It also properly defines the behavior of what the firewalls see. Last but not least it gives you if_enc(4) for IPv6 as well. [ As some auxiliary state was not available in the later input path we save it in the tdbi. That way tcpdump can give a consistent view of either of (authentic,confidential) for both before and after states. ] Discussed with: thompsa (2007-04-25, basic idea of unifying paths) Reviewed by: thompsa, gnn
2007-11-28 22:33:53 +00:00
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
/*
* The hhook consumer needs to go before ip[6]_destroy are called on
* SI_ORDER_THIRD.
*/
static void
vnet_enc_uninit_hhook(const void *unused __unused)
{
KASSERT(V_enc_sc != NULL, ("%s: V_enc_sc is %p\n", __func__, V_enc_sc));
enc_remove_hhooks(V_enc_sc);
}
VNET_SYSUNINIT(vnet_enc_uninit_hhook, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
vnet_enc_uninit_hhook, NULL);
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static int
enc_modevent(module_t mod, int type, void *data)
{
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
switch (type) {
case MOD_LOAD:
case MOD_UNLOAD:
break;
default:
return (EOPNOTSUPP);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
return (0);
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
}
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4).
2015-11-25 07:31:59 +00:00
static moduledata_t enc_mod = {
"if_enc",
enc_modevent,
0
};
Get closer to a VIMAGE network stack teardown from top to bottom rather than removing the network interfaces first. This change is rather larger and convoluted as the ordering requirements cannot be separated. Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and related modules to their own SI_SUB_PROTO_FIREWALL. Move initialization of "physical" interfaces to SI_SUB_DRIVERS, move virtual (cloned) interfaces to SI_SUB_PSEUDO. Move Multicast to SI_SUB_PROTO_MC. Re-work parts of multicast initialisation and teardown, not taking the huge amount of memory into account if used as a module yet. For interface teardown we try to do as many of them as we can on SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling over a higher layer protocol such as IP. In that case the interface has to go along (or before) the higher layer protocol is shutdown. Kernel hhooks need to go last on teardown as they may be used at various higher layers and we cannot remove them before we cleaned up the higher layers. For interface teardown there are multiple paths: (a) a cloned interface is destroyed (inside a VIMAGE or in the base system), (b) any interface is moved from a virtual network stack to a different network stack ("vmove"), or (c) a virtual network stack is being shut down. All code paths go through if_detach_internal() where we, depending on the vmove flag or the vnet state, make a decision on how much to shut down; in case we are destroying a VNET the individual protocol layers will cleanup their own parts thus we cannot do so again for each interface as we end up with, e.g., double-frees, destroying locks twice or acquiring already destroyed locks. When calling into protocol cleanups we equally have to tell them whether they need to detach upper layer protocols ("ulp") or not (e.g., in6_ifdetach()). Provide or enahnce helper functions to do proper cleanup at a protocol rather than at an interface level. Approved by: re (hrs) Obtained from: projects/vnet Reviewed by: gnn, jhb Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
DECLARE_MODULE(if_enc, enc_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
Declare module version. MFC after: 1 week
2017-03-27 07:56:41 +00:00
MODULE_VERSION(if_enc, 1);
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