freebsd-skq/sys/netipsec/ipsec_input.c

945 lines
24 KiB
C
Raw Normal View History

/* $FreeBSD$ */
/* $OpenBSD: ipsec_input.c,v 1.63 2003/02/20 18:35:43 deraadt Exp $ */
/*-
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr) and
* Niels Provos (provos@physnet.uni-hamburg.de).
*
* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
* in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Additional features in 1999 by Angelos D. Keromytis.
*
* Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
* Angelos D. Keromytis and Niels Provos.
* Copyright (c) 2001, Angelos D. Keromytis.
*
* Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
/*
* IPsec input processing.
*/
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipsec.h"
#include "opt_enc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/pfil.h>
#include <net/route.h>
#include <net/netisr.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>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#ifdef INET6
#include <netinet6/ip6_var.h>
#endif
#include <netinet/in_pcb.h>
#ifdef INET6
#include <netinet/icmp6.h>
#endif
#include <netipsec/ipsec.h>
#ifdef INET6
#include <netipsec/ipsec6.h>
#endif
#include <netipsec/ah_var.h>
#include <netipsec/esp.h>
#include <netipsec/esp_var.h>
#include <netipsec/ipcomp_var.h>
#include <netipsec/key.h>
#include <netipsec/keydb.h>
#include <netipsec/xform.h>
#include <netinet6/ip6protosw.h>
#include <machine/in_cksum.h>
#include <machine/stdarg.h>
#ifdef DEV_ENC
#include <net/if_enc.h>
#endif
#define IPSEC_ISTAT(proto, name) do { \
if ((proto) == IPPROTO_ESP) \
ESPSTAT_INC(esps_##name); \
else if ((proto) == IPPROTO_AH) \
AHSTAT_INC(ahs_##name); \
else \
IPCOMPSTAT_INC(ipcomps_##name); \
} while (0)
#ifdef INET
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
static void ipsec4_common_ctlinput(int, struct sockaddr *, void *, int);
#endif
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
/*
* ipsec_common_input gets called when an IPsec-protected packet
2010-10-25 16:11:37 +00:00
* is received by IPv4 or IPv6. Its job is to find the right SA
* and call the appropriate transform. The transform callback
* takes care of further processing (like ingress filtering).
*/
static int
ipsec_common_input(struct mbuf *m, int skip, int protoff, int af, int sproto)
{
union sockaddr_union dst_address;
struct secasvar *sav;
u_int32_t spi;
int error;
#ifdef INET
#ifdef IPSEC_NAT_T
struct m_tag *tag;
#endif
#endif
IPSEC_ISTAT(sproto, input);
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(m != NULL, ("null packet"));
IPSEC_ASSERT(sproto == IPPROTO_ESP || sproto == IPPROTO_AH ||
sproto == IPPROTO_IPCOMP,
("unexpected security protocol %u", sproto));
if ((sproto == IPPROTO_ESP && !V_esp_enable) ||
(sproto == IPPROTO_AH && !V_ah_enable) ||
(sproto == IPPROTO_IPCOMP && !V_ipcomp_enable)) {
m_freem(m);
IPSEC_ISTAT(sproto, pdrops);
return EOPNOTSUPP;
}
if (m->m_pkthdr.len - skip < 2 * sizeof (u_int32_t)) {
m_freem(m);
IPSEC_ISTAT(sproto, hdrops);
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: packet too small\n", __func__));
return EINVAL;
}
/* Retrieve the SPI from the relevant IPsec header */
if (sproto == IPPROTO_ESP)
m_copydata(m, skip, sizeof(u_int32_t), (caddr_t) &spi);
else if (sproto == IPPROTO_AH)
m_copydata(m, skip + sizeof(u_int32_t), sizeof(u_int32_t),
(caddr_t) &spi);
else if (sproto == IPPROTO_IPCOMP) {
u_int16_t cpi;
m_copydata(m, skip + sizeof(u_int16_t), sizeof(u_int16_t),
(caddr_t) &cpi);
spi = ntohl(htons(cpi));
}
/*
* Find the SA and (indirectly) call the appropriate
* kernel crypto routine. The resulting mbuf chain is a valid
* IP packet ready to go through input processing.
*/
bzero(&dst_address, sizeof (dst_address));
dst_address.sa.sa_family = af;
switch (af) {
#ifdef INET
case AF_INET:
dst_address.sin.sin_len = sizeof(struct sockaddr_in);
m_copydata(m, offsetof(struct ip, ip_dst),
sizeof(struct in_addr),
(caddr_t) &dst_address.sin.sin_addr);
#ifdef IPSEC_NAT_T
/* Find the source port for NAT-T; see udp*_espdecap. */
tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL);
if (tag != NULL)
dst_address.sin.sin_port = ((u_int16_t *)(tag + 1))[1];
#endif /* IPSEC_NAT_T */
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
dst_address.sin6.sin6_len = sizeof(struct sockaddr_in6);
m_copydata(m, offsetof(struct ip6_hdr, ip6_dst),
sizeof(struct in6_addr),
(caddr_t) &dst_address.sin6.sin6_addr);
break;
#endif /* INET6 */
default:
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: unsupported protocol family %u\n", __func__, af));
m_freem(m);
IPSEC_ISTAT(sproto, nopf);
return EPFNOSUPPORT;
}
/* NB: only pass dst since key_allocsa follows RFC2401 */
sav = KEY_ALLOCSA(&dst_address, sproto, spi);
if (sav == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: no key association found for SA %s/%08lx/%u\n",
__func__, ipsec_address(&dst_address),
(u_long) ntohl(spi), sproto));
IPSEC_ISTAT(sproto, notdb);
m_freem(m);
return ENOENT;
}
if (sav->tdb_xform == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: attempted to use uninitialized SA %s/%08lx/%u\n",
__func__, ipsec_address(&dst_address),
(u_long) ntohl(spi), sproto));
IPSEC_ISTAT(sproto, noxform);
KEY_FREESAV(&sav);
m_freem(m);
return ENXIO;
}
/*
* Call appropriate transform and return -- callback takes care of
* everything else.
*/
error = (*sav->tdb_xform->xf_input)(m, sav, skip, protoff);
KEY_FREESAV(&sav);
return error;
}
#ifdef INET
/*
* Common input handler for IPv4 AH, ESP, and IPCOMP.
*/
int
ipsec4_common_input(struct mbuf *m, ...)
{
va_list ap;
int off, nxt;
va_start(ap, m);
off = va_arg(ap, int);
nxt = va_arg(ap, int);
va_end(ap);
return ipsec_common_input(m, off, offsetof(struct ip, ip_p),
AF_INET, nxt);
}
int
ah4_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m;
int off;
m = *mp;
off = *offp;
*mp = NULL;
ipsec4_common_input(m, off, IPPROTO_AH);
return (IPPROTO_DONE);
}
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
void
ah4_ctlinput(int cmd, struct sockaddr *sa, void *v)
{
if (sa->sa_family == AF_INET &&
sa->sa_len == sizeof(struct sockaddr_in))
ipsec4_common_ctlinput(cmd, sa, v, IPPROTO_AH);
}
int
esp4_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m;
int off;
m = *mp;
off = *offp;
mp = NULL;
ipsec4_common_input(m, off, IPPROTO_ESP);
return (IPPROTO_DONE);
}
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
void
esp4_ctlinput(int cmd, struct sockaddr *sa, void *v)
{
if (sa->sa_family == AF_INET &&
sa->sa_len == sizeof(struct sockaddr_in))
ipsec4_common_ctlinput(cmd, sa, v, IPPROTO_ESP);
}
int
ipcomp4_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m;
int off;
m = *mp;
off = *offp;
mp = NULL;
ipsec4_common_input(m, off, IPPROTO_IPCOMP);
return (IPPROTO_DONE);
}
/*
* IPsec input callback for INET protocols.
* This routine is called as the transform callback.
* Takes care of filtering and other sanity checks on
* the processed packet.
*/
int
ipsec4_common_input_cb(struct mbuf *m, struct secasvar *sav,
int skip, int protoff, struct m_tag *mt)
{
int prot, af, sproto, isr_prot;
struct ip *ip;
struct m_tag *mtag;
struct tdb_ident *tdbi;
struct secasindex *saidx;
int error;
#ifdef INET6
#ifdef notyet
char ip6buf[INET6_ADDRSTRLEN];
#endif
#endif
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(m != NULL, ("null mbuf"));
IPSEC_ASSERT(sav != NULL, ("null SA"));
IPSEC_ASSERT(sav->sah != NULL, ("null SAH"));
saidx = &sav->sah->saidx;
af = saidx->dst.sa.sa_family;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(af == AF_INET, ("unexpected af %u", af));
sproto = saidx->proto;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(sproto == IPPROTO_ESP || sproto == IPPROTO_AH ||
sproto == IPPROTO_IPCOMP,
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
("unexpected security protocol %u", sproto));
/* Sanity check */
if (m == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: null mbuf", __func__));
IPSEC_ISTAT(sproto, badkcr);
KEY_FREESAV(&sav);
return EINVAL;
}
if (skip != 0) {
/*
* Fix IPv4 header
* XXXGL: do we need this entire block?
*/
if (m->m_len < skip && (m = m_pullup(m, skip)) == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: processing failed for SA %s/%08lx\n",
__func__, ipsec_address(&sav->sah->saidx.dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, hdrops);
error = ENOBUFS;
goto bad;
}
ip = mtod(m, struct ip *);
ip->ip_len = htons(m->m_pkthdr.len);
ip->ip_sum = 0;
ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
} else {
ip = mtod(m, struct ip *);
}
prot = ip->ip_p;
#ifdef DEV_ENC
if_inc_counter(encif, IFCOUNTER_IPACKETS, 1);
if_inc_counter(encif, IFCOUNTER_IBYTES, m->m_pkthdr.len);
/* Pass the mbuf to enc0 for bpf and pfil. */
ipsec_bpf(m, sav, AF_INET, ENC_IN|ENC_BEFORE);
if ((error = ipsec_filter(&m, PFIL_IN, ENC_IN|ENC_BEFORE)) != 0)
return (error);
#endif /* DEV_ENC */
/* IP-in-IP encapsulation */
if (prot == IPPROTO_IPIP &&
saidx->mode != IPSEC_MODE_TRANSPORT) {
if (m->m_pkthdr.len - skip < sizeof(struct ip)) {
IPSEC_ISTAT(sproto, hdrops);
error = EINVAL;
goto bad;
}
/* enc0: strip outer IPv4 header */
m_striphdr(m, 0, ip->ip_hl << 2);
#ifdef notyet
/* XXX PROXY address isn't recorded in SAH */
/*
* Check that the inner source address is the same as
* the proxy address, if available.
*/
if ((saidx->proxy.sa.sa_family == AF_INET &&
saidx->proxy.sin.sin_addr.s_addr !=
INADDR_ANY &&
ipn.ip_src.s_addr !=
saidx->proxy.sin.sin_addr.s_addr) ||
(saidx->proxy.sa.sa_family != AF_INET &&
saidx->proxy.sa.sa_family != 0)) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: inner source address %s doesn't "
"correspond to expected proxy source %s, "
"SA %s/%08lx\n", __func__,
inet_ntoa4(ipn.ip_src),
ipsp_address(saidx->proxy),
ipsp_address(saidx->dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, pdrops);
error = EACCES;
goto bad;
}
#endif /* notyet */
}
#ifdef INET6
/* IPv6-in-IP encapsulation. */
else if (prot == IPPROTO_IPV6 &&
saidx->mode != IPSEC_MODE_TRANSPORT) {
if (m->m_pkthdr.len - skip < sizeof(struct ip6_hdr)) {
IPSEC_ISTAT(sproto, hdrops);
error = EINVAL;
goto bad;
}
/* enc0: strip IPv4 header, keep IPv6 header only */
m_striphdr(m, 0, ip->ip_hl << 2);
#ifdef notyet
/*
* Check that the inner source address is the same as
* the proxy address, if available.
*/
if ((saidx->proxy.sa.sa_family == AF_INET6 &&
!IN6_IS_ADDR_UNSPECIFIED(&saidx->proxy.sin6.sin6_addr) &&
!IN6_ARE_ADDR_EQUAL(&ip6n.ip6_src,
&saidx->proxy.sin6.sin6_addr)) ||
(saidx->proxy.sa.sa_family != AF_INET6 &&
saidx->proxy.sa.sa_family != 0)) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: inner source address %s doesn't "
"correspond to expected proxy source %s, "
"SA %s/%08lx\n", __func__,
ip6_sprintf(ip6buf, &ip6n.ip6_src),
ipsec_address(&saidx->proxy),
ipsec_address(&saidx->dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, pdrops);
error = EACCES;
goto bad;
}
#endif /* notyet */
}
#endif /* INET6 */
else if (prot != IPPROTO_IPV6 && saidx->mode == IPSEC_MODE_ANY) {
/*
* When mode is wildcard, inner protocol is IPv6 and
* we have no INET6 support - drop this packet a bit later.
* In other cases we assume transport mode and outer
* header was already stripped in xform_xxx_cb.
*/
prot = IPPROTO_IPIP;
}
/*
* Record what we've done to the packet (under what SA it was
* processed). If we've been passed an mtag, it means the packet
* was already processed by an ethernet/crypto combo card and
* thus has a tag attached with all the right information, but
* with a PACKET_TAG_IPSEC_IN_CRYPTO_DONE as opposed to
* PACKET_TAG_IPSEC_IN_DONE type; in that case, just change the type.
*/
if (mt == NULL && sproto != IPPROTO_IPCOMP) {
mtag = m_tag_get(PACKET_TAG_IPSEC_IN_DONE,
sizeof(struct tdb_ident), M_NOWAIT);
if (mtag == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: failed to get tag\n", __func__));
IPSEC_ISTAT(sproto, hdrops);
error = ENOMEM;
goto bad;
}
tdbi = (struct tdb_ident *)(mtag + 1);
bcopy(&saidx->dst, &tdbi->dst, saidx->dst.sa.sa_len);
tdbi->proto = sproto;
tdbi->spi = sav->spi;
/* Cache those two for enc(4) in xform_ipip. */
tdbi->alg_auth = sav->alg_auth;
tdbi->alg_enc = sav->alg_enc;
m_tag_prepend(m, mtag);
} else if (mt != NULL) {
mt->m_tag_id = PACKET_TAG_IPSEC_IN_DONE;
/* XXX do we need to mark m_flags??? */
}
key_sa_recordxfer(sav, m); /* record data transfer */
/*
* In transport mode requeue decrypted mbuf back to IPv4 protocol
* handler. This is necessary to correctly expose rcvif.
*/
if (saidx->mode == IPSEC_MODE_TRANSPORT)
prot = IPPROTO_IPIP;
#ifdef DEV_ENC
/*
* Pass the mbuf to enc0 for bpf and pfil.
*/
if (prot == IPPROTO_IPIP)
ipsec_bpf(m, sav, AF_INET, ENC_IN|ENC_AFTER);
#ifdef INET6
if (prot == IPPROTO_IPV6)
ipsec_bpf(m, sav, AF_INET6, ENC_IN|ENC_AFTER);
#endif
if ((error = ipsec_filter(&m, PFIL_IN, ENC_IN|ENC_AFTER)) != 0)
return (error);
#endif /* DEV_ENC */
/*
* Re-dispatch via software interrupt.
*/
switch (prot) {
case IPPROTO_IPIP:
isr_prot = NETISR_IP;
break;
#ifdef INET6
case IPPROTO_IPV6:
isr_prot = NETISR_IPV6;
break;
#endif
default:
DPRINTF(("%s: cannot handle inner ip proto %d\n",
__func__, prot));
IPSEC_ISTAT(sproto, nopf);
error = EPFNOSUPPORT;
goto bad;
}
error = netisr_queue_src(isr_prot, (uintptr_t)sav->spi, m);
if (error) {
IPSEC_ISTAT(sproto, qfull);
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: queue full; proto %u packet dropped\n",
__func__, sproto));
return error;
}
return 0;
bad:
m_freem(m);
return error;
}
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
void
ipsec4_common_ctlinput(int cmd, struct sockaddr *sa, void *v, int proto)
{
/* XXX nothing just yet */
}
#endif /* INET */
#ifdef INET6
/* IPv6 AH wrapper. */
int
ipsec6_common_input(struct mbuf **mp, int *offp, int proto)
{
int l = 0;
int protoff;
struct ip6_ext ip6e;
if (*offp < sizeof(struct ip6_hdr)) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: bad offset %u\n", __func__, *offp));
return IPPROTO_DONE;
} else if (*offp == sizeof(struct ip6_hdr)) {
protoff = offsetof(struct ip6_hdr, ip6_nxt);
} else {
/* Chase down the header chain... */
protoff = sizeof(struct ip6_hdr);
do {
protoff += l;
m_copydata(*mp, protoff, sizeof(ip6e),
(caddr_t) &ip6e);
if (ip6e.ip6e_nxt == IPPROTO_AH)
l = (ip6e.ip6e_len + 2) << 2;
else
l = (ip6e.ip6e_len + 1) << 3;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(l > 0, ("l went zero or negative"));
} while (protoff + l < *offp);
/* Malformed packet check */
if (protoff + l != *offp) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: bad packet header chain, protoff %u, "
"l %u, off %u\n", __func__, protoff, l, *offp));
IPSEC_ISTAT(proto, hdrops);
m_freem(*mp);
*mp = NULL;
return IPPROTO_DONE;
}
protoff += offsetof(struct ip6_ext, ip6e_nxt);
}
(void) ipsec_common_input(*mp, *offp, protoff, AF_INET6, proto);
return IPPROTO_DONE;
}
/*
* IPsec input callback, called by the transform callback. Takes care of
* filtering and other sanity checks on the processed packet.
*/
int
ipsec6_common_input_cb(struct mbuf *m, struct secasvar *sav, int skip, int protoff,
struct m_tag *mt)
{
int prot, af, sproto;
struct ip6_hdr *ip6;
struct m_tag *mtag;
struct tdb_ident *tdbi;
struct secasindex *saidx;
int nxt;
u_int8_t nxt8;
int error, nest;
#ifdef notyet
char ip6buf[INET6_ADDRSTRLEN];
#endif
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(m != NULL, ("null mbuf"));
IPSEC_ASSERT(sav != NULL, ("null SA"));
IPSEC_ASSERT(sav->sah != NULL, ("null SAH"));
saidx = &sav->sah->saidx;
af = saidx->dst.sa.sa_family;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(af == AF_INET6, ("unexpected af %u", af));
sproto = saidx->proto;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
IPSEC_ASSERT(sproto == IPPROTO_ESP || sproto == IPPROTO_AH ||
sproto == IPPROTO_IPCOMP,
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
("unexpected security protocol %u", sproto));
/* Sanity check */
if (m == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: null mbuf", __func__));
IPSEC_ISTAT(sproto, badkcr);
error = EINVAL;
goto bad;
}
/* Fix IPv6 header */
if (m->m_len < sizeof(struct ip6_hdr) &&
(m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: processing failed for SA %s/%08lx\n",
__func__, ipsec_address(&sav->sah->saidx.dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, hdrops);
error = EACCES;
goto bad;
}
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr));
/* Save protocol */
prot = 0;
m_copydata(m, protoff, 1, (unsigned char *) &prot);
#ifdef DEV_ENC
if_inc_counter(encif, IFCOUNTER_IPACKETS, 1);
if_inc_counter(encif, IFCOUNTER_IBYTES, m->m_pkthdr.len);
/* Pass the mbuf to enc0 for bpf and pfil. */
ipsec_bpf(m, sav, AF_INET6, ENC_IN|ENC_BEFORE);
if ((error = ipsec_filter(&m, PFIL_IN, ENC_IN|ENC_BEFORE)) != 0)
return (error);
#endif /* DEV_ENC */
#ifdef INET
/* IP-in-IP encapsulation */
if (prot == IPPROTO_IPIP) {
if (m->m_pkthdr.len - skip < sizeof(struct ip)) {
IPSEC_ISTAT(sproto, hdrops);
error = EINVAL;
goto bad;
}
/* ipn will now contain the inner IPv4 header */
m_striphdr(m, 0, skip);
skip = 0;
#ifdef notyet
/*
* Check that the inner source address is the same as
* the proxy address, if available.
*/
if ((saidx->proxy.sa.sa_family == AF_INET &&
saidx->proxy.sin.sin_addr.s_addr != INADDR_ANY &&
ipn.ip_src.s_addr != saidx->proxy.sin.sin_addr.s_addr) ||
(saidx->proxy.sa.sa_family != AF_INET &&
saidx->proxy.sa.sa_family != 0)) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: inner source address %s doesn't "
"correspond to expected proxy source %s, "
"SA %s/%08lx\n", __func__,
inet_ntoa4(ipn.ip_src),
ipsec_address(&saidx->proxy),
ipsec_address(&saidx->dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, pdrops);
error = EACCES;
goto bad;
}
#endif /* notyet */
}
#endif /* INET */
/* IPv6-in-IP encapsulation */
if (prot == IPPROTO_IPV6) {
if (m->m_pkthdr.len - skip < sizeof(struct ip6_hdr)) {
IPSEC_ISTAT(sproto, hdrops);
error = EINVAL;
goto bad;
}
/* ip6n will now contain the inner IPv6 header. */
m_striphdr(m, 0, skip);
skip = 0;
#ifdef notyet
/*
* Check that the inner source address is the same as
* the proxy address, if available.
*/
if ((saidx->proxy.sa.sa_family == AF_INET6 &&
!IN6_IS_ADDR_UNSPECIFIED(&saidx->proxy.sin6.sin6_addr) &&
!IN6_ARE_ADDR_EQUAL(&ip6n.ip6_src,
&saidx->proxy.sin6.sin6_addr)) ||
(saidx->proxy.sa.sa_family != AF_INET6 &&
saidx->proxy.sa.sa_family != 0)) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: inner source address %s doesn't "
"correspond to expected proxy source %s, "
"SA %s/%08lx\n", __func__,
ip6_sprintf(ip6buf, &ip6n.ip6_src),
ipsec_address(&saidx->proxy),
ipsec_address(&saidx->dst),
(u_long) ntohl(sav->spi)));
IPSEC_ISTAT(sproto, pdrops);
error = EACCES;
goto bad;
}
#endif /* notyet */
}
/*
* Record what we've done to the packet (under what SA it was
* processed). If we've been passed an mtag, it means the packet
* was already processed by an ethernet/crypto combo card and
* thus has a tag attached with all the right information, but
* with a PACKET_TAG_IPSEC_IN_CRYPTO_DONE as opposed to
* PACKET_TAG_IPSEC_IN_DONE type; in that case, just change the type.
*/
if (mt == NULL && sproto != IPPROTO_IPCOMP) {
mtag = m_tag_get(PACKET_TAG_IPSEC_IN_DONE,
sizeof(struct tdb_ident), M_NOWAIT);
if (mtag == NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
DPRINTF(("%s: failed to get tag\n", __func__));
IPSEC_ISTAT(sproto, hdrops);
error = ENOMEM;
goto bad;
}
tdbi = (struct tdb_ident *)(mtag + 1);
bcopy(&saidx->dst, &tdbi->dst, sizeof(union sockaddr_union));
tdbi->proto = sproto;
tdbi->spi = sav->spi;
/* Cache those two for enc(4) in xform_ipip. */
tdbi->alg_auth = sav->alg_auth;
tdbi->alg_enc = sav->alg_enc;
m_tag_prepend(m, mtag);
} else {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
if (mt != NULL)
mt->m_tag_id = PACKET_TAG_IPSEC_IN_DONE;
/* XXX do we need to mark m_flags??? */
}
key_sa_recordxfer(sav, m);
#ifdef DEV_ENC
/*
* Pass the mbuf to enc0 for bpf and pfil.
*/
#ifdef INET
if (prot == IPPROTO_IPIP)
ipsec_bpf(m, sav, AF_INET, ENC_IN|ENC_AFTER);
#endif
if (prot == IPPROTO_IPV6)
ipsec_bpf(m, sav, AF_INET6, ENC_IN|ENC_AFTER);
if ((error = ipsec_filter(&m, PFIL_IN, ENC_IN|ENC_AFTER)) != 0)
return (error);
#endif /* DEV_ENC */
/* Retrieve new protocol */
/* We have stripped the IP6 header from the mbuf, we have to use the backuped proto value instead */
nxt8 = prot;
/*
* See the end of ip6_input for this logic.
* IPPROTO_IPV[46] case will be processed just like other ones
*/
nest = 0;
nxt = nxt8;
while (nxt != IPPROTO_DONE) {
if (V_ip6_hdrnestlimit && (++nest > V_ip6_hdrnestlimit)) {
IP6STAT_INC(ip6s_toomanyhdr);
error = EINVAL;
goto bad;
}
/*
* Protection against faulty packet - there should be
* more sanity checks in header chain processing.
*/
if (m->m_pkthdr.len < skip) {
IP6STAT_INC(ip6s_tooshort);
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
error = EINVAL;
goto bad;
}
/*
* Enforce IPsec policy checking if we are seeing last header.
* note that we do not visit this with protocols with pcb layer
* code - like udp/tcp/raw ip.
*/
if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
ipsec6_in_reject(m, NULL)) {
error = EINVAL;
goto bad;
}
nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &skip, nxt);
}
return 0;
bad:
if (m)
m_freem(m);
return error;
}
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
void
esp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
{
struct ip6ctlparam *ip6cp = NULL;
struct mbuf *m = NULL;
struct ip6_hdr *ip6;
int off;
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
if (sa->sa_family != AF_INET6 ||
sa->sa_len != sizeof(struct sockaddr_in6))
return;
if ((unsigned)cmd >= PRC_NCMDS)
return;
/* if the parameter is from icmp6, decode it. */
if (d != NULL) {
ip6cp = (struct ip6ctlparam *)d;
m = ip6cp->ip6c_m;
ip6 = ip6cp->ip6c_ip6;
off = ip6cp->ip6c_off;
} else {
m = NULL;
ip6 = NULL;
off = 0; /* calm gcc */
}
if (ip6 != NULL) {
MFp4: portability work, general cleanup, locking fixes change 38496 o add ipsec_osdep.h that holds os-specific definitions for portability o s/KASSERT/IPSEC_ASSERT/ for portability o s/SPLASSERT/IPSEC_SPLASSERT/ for portability o remove function names from ASSERT strings since line#+file pinpints the location o use __func__ uniformly to reduce string storage o convert some random #ifdef DIAGNOSTIC code to assertions o remove some debuggging assertions no longer needed change 38498 o replace numerous bogus panic's with equally bogus assertions that at least go away on a production system change 38502 + 38530 o change explicit mtx operations to #defines to simplify future changes to a different lock type change 38531 o hookup ipv4 ctlinput paths to a noop routine; we should be handling path mtu changes at least o correct potential null pointer deref in ipsec4_common_input_cb chnage 38685 o fix locking for bundled SA's and for when key exchange is required change 38770 o eliminate recursion on the SAHTREE lock change 38804 o cleanup some types: long -> time_t o remove refrence to dead #define change 38805 o correct some types: long -> time_t o add scan generation # to secpolicy to deal with locking issues change 38806 o use LIST_FOREACH_SAFE instead of handrolled code o change key_flush_spd to drop the sptree lock before purging an entry to avoid lock recursion and to avoid holding the lock over a long-running operation o misc cleanups of tangled and twisty code There is still much to do here but for now things look to be working again. Supported by: FreeBSD Foundation
2003-09-29 22:57:43 +00:00
struct ip6ctlparam ip6cp1;
/*
* Notify the error to all possible sockets via pfctlinput2.
* Since the upper layer information (such as protocol type,
* source and destination ports) is embedded in the encrypted
* data and might have been cut, we can't directly call
* an upper layer ctlinput function. However, the pcbnotify
* function will consider source and destination addresses
* as well as the flow info value, and may be able to find
* some PCB that should be notified.
* Although pfctlinput2 will call esp6_ctlinput(), there is
* no possibility of an infinite loop of function calls,
* because we don't pass the inner IPv6 header.
*/
bzero(&ip6cp1, sizeof(ip6cp1));
ip6cp1.ip6c_src = ip6cp->ip6c_src;
pfctlinput2(cmd, sa, (void *)&ip6cp1);
/*
* Then go to special cases that need ESP header information.
* XXX: We assume that when ip6 is non NULL,
* M and OFF are valid.
*/
if (cmd == PRC_MSGSIZE) {
struct secasvar *sav;
u_int32_t spi;
int valid;
/* check header length before using m_copydata */
if (m->m_pkthdr.len < off + sizeof (struct esp))
return;
m_copydata(m, off + offsetof(struct esp, esp_spi),
sizeof(u_int32_t), (caddr_t) &spi);
/*
* Check to see if we have a valid SA corresponding to
* the address in the ICMP message payload.
*/
sav = KEY_ALLOCSA((union sockaddr_union *)sa,
IPPROTO_ESP, spi);
valid = (sav != NULL);
if (sav)
KEY_FREESAV(&sav);
/* XXX Further validation? */
/*
* Depending on whether the SA is "valid" and
* routing table size (mtudisc_{hi,lo}wat), we will:
* - recalcurate the new MTU and create the
* corresponding routing entry, or
* - ignore the MTU change notification.
*/
icmp6_mtudisc_update(ip6cp, valid);
}
} else {
/* we normally notify any pcb here */
}
}
#endif /* INET6 */