File: [local] / sys / net / pfkeyv2.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:16:39 2008 UTC (16 years, 6 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: pfkeyv2.c,v 1.115 2007/06/22 12:14:05 markus Exp $ */
/*
* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
*
* NRL grants permission for redistribution and use in source and binary
* forms, with or without modification, of the software and documentation
* created at NRL 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed at the Information
* Technology Division, US Naval Research Laboratory.
* 4. Neither the name of the NRL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the US Naval
* Research Laboratory (NRL).
*/
/*
* Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. 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.
* 3. Neither the name of the author nor the names of any contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#include "pf.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <net/route.h>
#include <netinet/ip_ipsp.h>
#include <net/pfkeyv2.h>
#include <netinet/ip_ah.h>
#include <netinet/ip_esp.h>
#include <netinet/ip_ipcomp.h>
#include <crypto/blf.h>
#if NPF > 0
#include <net/if.h>
#include <net/pfvar.h>
#endif
#define PFKEYV2_PROTOCOL 2
#define GETSPI_TRIES 10
/* Static globals */
static struct pfkeyv2_socket *pfkeyv2_sockets = NULL;
static struct pfkey_version pfkeyv2_version;
static uint32_t pfkeyv2_seq = 1;
static int nregistered = 0;
static int npromisc = 0;
static const struct sadb_alg ealgs[] = {
{ SADB_EALG_NULL, 0, 0, 0 },
{ SADB_EALG_DESCBC, 64, 64, 64 },
{ SADB_EALG_3DESCBC, 64, 192, 192 },
{ SADB_X_EALG_BLF, 64, 40, BLF_MAXKEYLEN * 8},
{ SADB_X_EALG_CAST, 64, 40, 128},
{ SADB_X_EALG_SKIPJACK, 64, 80, 80},
{ SADB_X_EALG_AES, 128, 128, 256},
{ SADB_X_EALG_AESCTR, 128, 128 + 32, 256 + 32}
};
static const struct sadb_alg aalgs[] = {
{ SADB_AALG_SHA1HMAC, 0, 160, 160 },
{ SADB_AALG_MD5HMAC, 0, 128, 128 },
{ SADB_X_AALG_RIPEMD160HMAC, 0, 160, 160 },
{ SADB_X_AALG_SHA2_256, 0, 256, 256 },
{ SADB_X_AALG_SHA2_384, 0, 384, 384 },
{ SADB_X_AALG_SHA2_512, 0, 512, 512 }
};
static const struct sadb_alg calgs[] = {
{ SADB_X_CALG_DEFLATE, 0, 0, 0},
{ SADB_X_CALG_LZS, 0, 0, 0}
};
extern uint64_t sadb_exts_allowed_out[SADB_MAX+1];
extern uint64_t sadb_exts_required_out[SADB_MAX+1];
extern struct pool ipsec_policy_pool;
/*
* Wrapper around m_devget(); copy data from contiguous buffer to mbuf
* chain.
*/
int
pfdatatopacket(void *data, int len, struct mbuf **packet)
{
if (!(*packet = m_devget(data, len, 0, NULL, NULL)))
return (ENOMEM);
return (0);
}
/*
* Create a new PF_KEYv2 socket.
*/
int
pfkeyv2_create(struct socket *socket)
{
struct pfkeyv2_socket *pfkeyv2_socket;
if (!(pfkeyv2_socket = malloc(sizeof(struct pfkeyv2_socket),
M_PFKEY, M_DONTWAIT)))
return (ENOMEM);
bzero(pfkeyv2_socket, sizeof(struct pfkeyv2_socket));
pfkeyv2_socket->next = pfkeyv2_sockets;
pfkeyv2_socket->socket = socket;
pfkeyv2_socket->pid = curproc->p_pid;
pfkeyv2_sockets = pfkeyv2_socket;
return (0);
}
/*
* Close a PF_KEYv2 socket.
*/
int
pfkeyv2_release(struct socket *socket)
{
struct pfkeyv2_socket **pp;
for (pp = &pfkeyv2_sockets; *pp && ((*pp)->socket != socket);
pp = &((*pp)->next))
/*EMPTY*/;
if (*pp) {
struct pfkeyv2_socket *pfkeyv2_socket;
pfkeyv2_socket = *pp;
*pp = (*pp)->next;
if (pfkeyv2_socket->flags & PFKEYV2_SOCKETFLAGS_REGISTERED)
nregistered--;
if (pfkeyv2_socket->flags & PFKEYV2_SOCKETFLAGS_PROMISC)
npromisc--;
free(pfkeyv2_socket, M_PFKEY);
}
return (0);
}
/*
* Send a PFKEYv2 message, possibly to many receivers, based on the
* satype of the socket (which is set by the REGISTER message), and the
* third argument.
*/
int
pfkeyv2_sendmessage(void **headers, int mode, struct socket *socket,
u_int8_t satype, int count)
{
int i, j, rval;
void *p, *buffer = NULL;
struct mbuf *packet;
struct pfkeyv2_socket *s;
struct sadb_msg *smsg;
/* Find out how much space we'll need... */
j = sizeof(struct sadb_msg);
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
j += ((struct sadb_ext *)headers[i])->sadb_ext_len *
sizeof(uint64_t);
/* ...and allocate it */
if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY,
M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
p = buffer + sizeof(struct sadb_msg);
bcopy(headers[0], p, sizeof(struct sadb_msg));
((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t);
p += sizeof(struct sadb_msg);
/* Copy payloads in the packet */
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i]) {
((struct sadb_ext *) headers[i])->sadb_ext_type = i;
bcopy(headers[i], p, EXTLEN(headers[i]));
p += EXTLEN(headers[i]);
}
if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg),
j, &packet)) != 0)
goto ret;
switch (mode) {
case PFKEYV2_SENDMESSAGE_UNICAST:
/*
* Send message to the specified socket, plus all
* promiscuous listeners.
*/
pfkey_sendup(socket, packet, 0);
/*
* Promiscuous messages contain the original message
* encapsulated in another sadb_msg header.
*/
bzero(buffer, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) buffer;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
sizeof(uint64_t);
smsg->sadb_msg_seq = 0;
/* Copy to mbuf chain */
if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
&packet)) != 0)
goto ret;
/*
* Search for promiscuous listeners, skipping the
* original destination.
*/
for (s = pfkeyv2_sockets; s; s = s->next)
if ((s->flags & PFKEYV2_SOCKETFLAGS_PROMISC) &&
(s->socket != socket))
pfkey_sendup(s->socket, packet, 1);
/* Done, let's be a bit paranoid */
m_zero(packet);
m_freem(packet);
break;
case PFKEYV2_SENDMESSAGE_REGISTERED:
/*
* Send the message to all registered sockets that match
* the specified satype (e.g., all IPSEC-ESP negotiators)
*/
for (s = pfkeyv2_sockets; s; s = s->next)
if (s->flags & PFKEYV2_SOCKETFLAGS_REGISTERED) {
if (!satype) /* Just send to everyone registered */
pfkey_sendup(s->socket, packet, 1);
else {
/* Check for specified satype */
if ((1 << satype) & s->registration)
pfkey_sendup(s->socket, packet, 1);
}
}
/* Free last/original copy of the packet */
m_freem(packet);
/* Encapsulate the original message "inside" an sadb_msg header */
bzero(buffer, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) buffer;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
sizeof(uint64_t);
smsg->sadb_msg_seq = 0;
/* Convert to mbuf chain */
if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
&packet)) != 0)
goto ret;
/* Send to all registered promiscuous listeners */
for (s = pfkeyv2_sockets; s; s = s->next)
if ((s->flags & PFKEYV2_SOCKETFLAGS_PROMISC) &&
!(s->flags & PFKEYV2_SOCKETFLAGS_REGISTERED))
pfkey_sendup(s->socket, packet, 1);
m_freem(packet);
break;
case PFKEYV2_SENDMESSAGE_BROADCAST:
/* Send message to all sockets */
for (s = pfkeyv2_sockets; s; s = s->next)
pfkey_sendup(s->socket, packet, 1);
m_freem(packet);
break;
}
ret:
if (buffer != NULL) {
bzero(buffer, j + sizeof(struct sadb_msg));
free(buffer, M_PFKEY);
}
return (rval);
}
/*
* Get SPD information for an ACQUIRE. We setup the message such that
* the SRC/DST payloads are relative to us (regardless of whether the
* SPD rule was for incoming or outgoing packets).
*/
int
pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer)
{
union sockaddr_union sunion;
struct sadb_protocol *sp;
int rval, i, dir;
void *p;
/* Find out how big a buffer we need */
i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol);
bzero(&sunion, sizeof(union sockaddr_union));
switch (ipa->ipa_info.sen_type) {
#ifdef INET
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
sunion.sa.sa_family = AF_INET;
sunion.sa.sa_len = sizeof(struct sockaddr_in);
dir = ipa->ipa_info.sen_direction;
break;
#endif /* INET */
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
sunion.sa.sa_family = AF_INET6;
sunion.sa.sa_len = sizeof(struct sockaddr_in6);
dir = ipa->ipa_info.sen_ip6_direction;
break;
#endif /* INET6 */
default:
return (EINVAL);
}
if (!(p = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
} else {
*buffer = p;
bzero(p, i);
}
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_SRC_FLOW] = p;
else
headers[SADB_X_EXT_DST_FLOW] = p;
switch (sunion.sa.sa_family) {
#ifdef INET
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src;
sunion.sin.sin_port = ipa->ipa_info.sen_sport;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src;
sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport;
break;
#endif /* INET6 */
}
export_address(&p, (struct sockaddr *) &sunion);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_SRC_MASK] = p;
else
headers[SADB_X_EXT_DST_MASK] = p;
switch (sunion.sa.sa_family) {
#ifdef INET
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src;
sunion.sin.sin_port = ipa->ipa_mask.sen_sport;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src;
sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport;
break;
#endif /* INET6 */
}
export_address(&p, (struct sockaddr *) &sunion);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_DST_FLOW] = p;
else
headers[SADB_X_EXT_SRC_FLOW] = p;
switch (sunion.sa.sa_family) {
#ifdef INET
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst;
sunion.sin.sin_port = ipa->ipa_info.sen_dport;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst;
sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport;
break;
#endif /* INET6 */
}
export_address(&p, (struct sockaddr *) &sunion);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_DST_MASK] = p;
else
headers[SADB_X_EXT_SRC_MASK] = p;
switch (sunion.sa.sa_family) {
#ifdef INET
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst;
sunion.sin.sin_port = ipa->ipa_mask.sen_dport;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst;
sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport;
break;
#endif /* INET6 */
}
export_address(&p, (struct sockaddr *) &sunion);
headers[SADB_X_EXT_FLOW_TYPE] = p;
sp = p;
sp->sadb_protocol_len = sizeof(struct sadb_protocol) /
sizeof(u_int64_t);
switch (sunion.sa.sa_family) {
#ifdef INET
case AF_INET:
if (ipa->ipa_mask.sen_proto)
sp->sadb_protocol_proto = ipa->ipa_info.sen_proto;
sp->sadb_protocol_direction = ipa->ipa_info.sen_direction;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (ipa->ipa_mask.sen_ip6_proto)
sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto;
sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction;
break;
#endif /* INET6 */
}
rval = 0;
ret:
return (rval);
}
/*
* Get all the information contained in an SA to a PFKEYV2 message.
*/
int
pfkeyv2_get(struct tdb *sa, void **headers, void **buffer, int *lenp)
{
int rval, i;
void *p;
/* Find how much space we need */
i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime);
if (sa->tdb_soft_allocations || sa->tdb_soft_bytes ||
sa->tdb_soft_timeout || sa->tdb_soft_first_use)
i += sizeof(struct sadb_lifetime);
if (sa->tdb_exp_allocations || sa->tdb_exp_bytes ||
sa->tdb_exp_timeout || sa->tdb_exp_first_use)
i += sizeof(struct sadb_lifetime);
if (sa->tdb_last_used)
i += sizeof(struct sadb_lifetime);
if (sa->tdb_src.sa.sa_family)
i += sizeof(struct sadb_address) + PADUP(SA_LEN(&sa->tdb_src.sa));
if (sa->tdb_dst.sa.sa_family)
i += sizeof(struct sadb_address) + PADUP(SA_LEN(&sa->tdb_dst.sa));
if (sa->tdb_proxy.sa.sa_family)
i += sizeof(struct sadb_address) + PADUP(SA_LEN(&sa->tdb_proxy.sa));
if (sa->tdb_srcid)
i += PADUP(sa->tdb_srcid->ref_len) + sizeof(struct sadb_ident);
if (sa->tdb_dstid)
i += PADUP(sa->tdb_dstid->ref_len) + sizeof(struct sadb_ident);
if (sa->tdb_local_cred)
i += PADUP(sa->tdb_local_cred->ref_len) + sizeof(struct sadb_x_cred);
if (sa->tdb_remote_cred)
i += PADUP(sa->tdb_remote_cred->ref_len) + sizeof(struct sadb_x_cred);
if (sa->tdb_local_auth)
i += PADUP(sa->tdb_local_auth->ref_len) + sizeof(struct sadb_x_cred);
if (sa->tdb_remote_auth)
i += PADUP(sa->tdb_remote_auth->ref_len) + sizeof(struct sadb_x_cred);
if (sa->tdb_amxkey)
i+= PADUP(sa->tdb_amxkeylen) + sizeof(struct sadb_key);
if (sa->tdb_emxkey)
i+= PADUP(sa->tdb_emxkeylen) + sizeof(struct sadb_key);
if (sa->tdb_filter.sen_type) {
i += 2 * sizeof(struct sadb_protocol);
/* We'll need four of them: src, src mask, dst, dst mask. */
switch (sa->tdb_filter.sen_type) {
#ifdef INET
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET */
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
rval = EINVAL;
goto ret;
}
}
if (sa->tdb_udpencap_port)
i+= sizeof(struct sadb_x_udpencap);
#if NPF > 0
if (sa->tdb_tag)
i+= PADUP(PF_TAG_NAME_SIZE) + sizeof(struct sadb_x_tag);
#endif
if (lenp)
*lenp = i;
if (buffer == NULL) {
rval = 0;
goto ret;
}
if (!(p = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
} else {
*buffer = p;
bzero(p, i);
}
headers[SADB_EXT_SA] = p;
export_sa(&p, sa); /* Export SA information (mostly flags) */
/* Export lifetimes where applicable */
headers[SADB_EXT_LIFETIME_CURRENT] = p;
export_lifetime(&p, sa, PFKEYV2_LIFETIME_CURRENT);
if (sa->tdb_soft_allocations || sa->tdb_soft_bytes ||
sa->tdb_soft_first_use || sa->tdb_soft_timeout) {
headers[SADB_EXT_LIFETIME_SOFT] = p;
export_lifetime(&p, sa, PFKEYV2_LIFETIME_SOFT);
}
if (sa->tdb_exp_allocations || sa->tdb_exp_bytes ||
sa->tdb_exp_first_use || sa->tdb_exp_timeout) {
headers[SADB_EXT_LIFETIME_HARD] = p;
export_lifetime(&p, sa, PFKEYV2_LIFETIME_HARD);
}
if (sa->tdb_last_used) {
headers[SADB_X_EXT_LIFETIME_LASTUSE] = p;
export_lifetime(&p, sa, PFKEYV2_LIFETIME_LASTUSE);
}
/* Export TDB source address */
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, (struct sockaddr *) &sa->tdb_src);
/* Export TDB destination address */
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, (struct sockaddr *) &sa->tdb_dst);
/* Export TDB proxy address, if present */
if (SA_LEN(&sa->tdb_proxy.sa)) {
headers[SADB_EXT_ADDRESS_PROXY] = p;
export_address(&p, (struct sockaddr *) &sa->tdb_proxy);
}
/* Export source identity, if present */
if (sa->tdb_srcid) {
headers[SADB_EXT_IDENTITY_SRC] = p;
export_identity(&p, sa, PFKEYV2_IDENTITY_SRC);
}
/* Export destination identity, if present */
if (sa->tdb_dstid) {
headers[SADB_EXT_IDENTITY_DST] = p;
export_identity(&p, sa, PFKEYV2_IDENTITY_DST);
}
/* Export credentials, if present */
if (sa->tdb_local_cred) {
headers[SADB_X_EXT_LOCAL_CREDENTIALS] = p;
export_credentials(&p, sa, PFKEYV2_CRED_LOCAL);
}
if (sa->tdb_remote_cred) {
headers[SADB_X_EXT_REMOTE_CREDENTIALS] = p;
export_credentials(&p, sa, PFKEYV2_CRED_REMOTE);
}
/* Export authentication information, if present */
if (sa->tdb_local_auth) {
headers[SADB_X_EXT_LOCAL_AUTH] = p;
export_auth(&p, sa, PFKEYV2_AUTH_LOCAL);
}
if (sa->tdb_remote_auth) {
headers[SADB_X_EXT_REMOTE_AUTH] = p;
export_auth(&p, sa, PFKEYV2_AUTH_REMOTE);
}
/* Export authentication key, if present */
if (sa->tdb_amxkey) {
headers[SADB_EXT_KEY_AUTH] = p;
export_key(&p, sa, PFKEYV2_AUTHENTICATION_KEY);
}
/* Export encryption key, if present */
if (sa->tdb_emxkey) {
headers[SADB_EXT_KEY_ENCRYPT] = p;
export_key(&p, sa, PFKEYV2_ENCRYPTION_KEY);
}
/* Export flow/filter, if present */
if (sa->tdb_filter.sen_type)
export_flow(&p, IPSP_IPSEC_USE, &sa->tdb_filter,
&sa->tdb_filtermask, headers);
/* Export UDP encapsulation port, if present */
if (sa->tdb_udpencap_port) {
headers[SADB_X_EXT_UDPENCAP] = p;
export_udpencap(&p, sa);
}
#if NPF > 0
/* Export tag information, if present */
if (sa->tdb_tag) {
headers[SADB_X_EXT_TAG] = p;
export_tag(&p, sa);
}
#endif
rval = 0;
ret:
return (rval);
}
/*
* Dump a TDB.
*/
int
pfkeyv2_dump_walker(struct tdb *sa, void *state, int last)
{
struct dump_state *dump_state = (struct dump_state *) state;
void *headers[SADB_EXT_MAX+1], *buffer;
int rval;
/* If not satype was specified, dump all TDBs */
if (!dump_state->sadb_msg->sadb_msg_satype ||
(sa->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) {
bzero(headers, sizeof(headers));
headers[0] = (void *) dump_state->sadb_msg;
/* Get the information from the TDB to a PFKEYv2 message */
if ((rval = pfkeyv2_get(sa, headers, &buffer, NULL)) != 0)
return (rval);
if (last)
((struct sadb_msg *)headers[0])->sadb_msg_seq = 0;
/* Send the message to the specified socket */
rval = pfkeyv2_sendmessage(headers,
PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0);
free(buffer, M_PFKEY);
if (rval)
return (rval);
}
return (0);
}
/*
* Delete an SA.
*/
int
pfkeyv2_flush_walker(struct tdb *sa, void *satype_vp, int last)
{
if (!(*((u_int8_t *) satype_vp)) ||
sa->tdb_satype == *((u_int8_t *) satype_vp))
tdb_delete(sa);
return (0);
}
/*
* Convert between SATYPEs and IPsec protocols, taking into consideration
* sysctl variables enabling/disabling ESP/AH and the presence of the old
* IPsec transforms.
*/
int
pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg)
{
switch (satype) {
#ifdef IPSEC
case SADB_SATYPE_AH:
if (!ah_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_AH;
if(alg != NULL)
*alg = satype = XF_AH;
break;
case SADB_SATYPE_ESP:
if (!esp_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_ESP;
if(alg != NULL)
*alg = satype = XF_ESP;
break;
case SADB_X_SATYPE_IPIP:
*sproto = IPPROTO_IPIP;
if (alg != NULL)
*alg = XF_IP4;
break;
case SADB_X_SATYPE_IPCOMP:
if (!ipcomp_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_IPCOMP;
if(alg != NULL)
*alg = satype = XF_IPCOMP;
break;
#endif /* IPSEC */
#ifdef TCP_SIGNATURE
case SADB_X_SATYPE_TCPSIGNATURE:
*sproto = IPPROTO_TCP;
if (alg != NULL)
*alg = XF_TCPSIGNATURE;
break;
#endif /* TCP_SIGNATURE */
default: /* Nothing else supported */
return (EOPNOTSUPP);
}
return (0);
}
/*
* Handle all messages from userland to kernel.
*/
int
pfkeyv2_send(struct socket *socket, void *message, int len)
{
int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST;
int delflag = 0, s;
struct sockaddr_encap encapdst, encapnetmask, encapgw;
struct ipsec_policy *ipo, *tmpipo;
struct ipsec_acquire *ipa;
struct pfkeyv2_socket *pfkeyv2_socket, *so = NULL;
void *freeme = NULL, *bckptr = NULL;
void *headers[SADB_EXT_MAX + 1];
union sockaddr_union *sunionp;
struct tdb sa, *sa2 = NULL;
struct sadb_msg *smsg;
struct sadb_spirange *sprng;
struct sadb_sa *ssa;
struct sadb_supported *ssup;
struct sadb_ident *sid;
/* Verify that we received this over a legitimate pfkeyv2 socket */
bzero(headers, sizeof(headers));
for (pfkeyv2_socket = pfkeyv2_sockets; pfkeyv2_socket;
pfkeyv2_socket = pfkeyv2_socket->next)
if (pfkeyv2_socket->socket == socket)
break;
if (!pfkeyv2_socket) {
rval = EINVAL;
goto ret;
}
/* If we have any promiscuous listeners, send them a copy of the message */
if (npromisc) {
struct mbuf *packet;
if (!(freeme = malloc(sizeof(struct sadb_msg) + len, M_PFKEY,
M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
/* Initialize encapsulating header */
bzero(freeme, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) freeme;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) /
sizeof(uint64_t);
smsg->sadb_msg_seq = curproc->p_pid;
bcopy(message, freeme + sizeof(struct sadb_msg), len);
/* Convert to mbuf chain */
if ((rval = pfdatatopacket(freeme,
sizeof(struct sadb_msg) + len, &packet)) != 0)
goto ret;
/* Send to all promiscuous listeners */
for (so = pfkeyv2_sockets; so; so = so->next)
if (so->flags & PFKEYV2_SOCKETFLAGS_PROMISC)
pfkey_sendup(so->socket, packet, 1);
/* Paranoid */
m_zero(packet);
m_freem(packet);
/* Even more paranoid */
bzero(freeme, sizeof(struct sadb_msg) + len);
free(freeme, M_PFKEY);
freeme = NULL;
}
/* Validate message format */
if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0)
goto ret;
smsg = (struct sadb_msg *) headers[0];
switch (smsg->sadb_msg_type) {
case SADB_GETSPI: /* Reserve an SPI */
bzero(&sa, sizeof(struct tdb));
sa.tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(sa.tdb_satype,
&sa.tdb_sproto, 0)))
goto ret;
import_address((struct sockaddr *) &sa.tdb_src,
headers[SADB_EXT_ADDRESS_SRC]);
import_address((struct sockaddr *) &sa.tdb_dst,
headers[SADB_EXT_ADDRESS_DST]);
/* Find an unused SA identifier */
sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE];
sa.tdb_spi = reserve_spi(sprng->sadb_spirange_min,
sprng->sadb_spirange_max, &sa.tdb_src, &sa.tdb_dst,
sa.tdb_sproto, &rval);
if (sa.tdb_spi == 0)
goto ret;
/* Send a message back telling what the SA (the SPI really) is */
if (!(freeme = malloc(sizeof(struct sadb_sa), M_PFKEY,
M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
bzero(freeme, sizeof(struct sadb_sa));
headers[SADB_EXT_SPIRANGE] = NULL;
headers[SADB_EXT_SA] = freeme;
bckptr = freeme;
/* We really only care about the SPI, but we'll export the SA */
export_sa((void **) &bckptr, &sa);
break;
case SADB_UPDATE:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
/* Either all or none of the flow must be included */
if ((headers[SADB_X_EXT_SRC_FLOW] ||
headers[SADB_X_EXT_PROTOCOL] ||
headers[SADB_X_EXT_FLOW_TYPE] ||
headers[SADB_X_EXT_DST_FLOW] ||
headers[SADB_X_EXT_SRC_MASK] ||
headers[SADB_X_EXT_DST_MASK]) &&
!(headers[SADB_X_EXT_SRC_FLOW] &&
headers[SADB_X_EXT_PROTOCOL] &&
headers[SADB_X_EXT_FLOW_TYPE] &&
headers[SADB_X_EXT_DST_FLOW] &&
headers[SADB_X_EXT_SRC_MASK] &&
headers[SADB_X_EXT_DST_MASK])) {
rval = EINVAL;
goto ret;
}
#ifdef IPSEC
/* UDP encap has to be enabled and is only supported for ESP */
if (headers[SADB_X_EXT_UDPENCAP] &&
(!udpencap_enable ||
smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
rval = EINVAL;
goto ret;
}
#endif /* IPSEC */
s = spltdb();
/* Find TDB */
sa2 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
/* If there's no such SA, we're done */
if (sa2 == NULL) {
rval = ESRCH;
goto splxret;
}
/* If this is a reserved SA */
if (sa2->tdb_flags & TDBF_INVALID) {
struct tdb *newsa;
struct ipsecinit ii;
int alg;
/* Create new TDB */
freeme = tdb_alloc();
bzero(&ii, sizeof(struct ipsecinit));
newsa = (struct tdb *) freeme;
newsa->tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
&newsa->tdb_sproto, &alg))) {
tdb_free(freeme);
freeme = NULL;
goto splxret;
}
/* Initialize SA */
import_sa(newsa, headers[SADB_EXT_SA], &ii);
import_address((struct sockaddr *) &newsa->tdb_src,
headers[SADB_EXT_ADDRESS_SRC]);
import_address((struct sockaddr *) &newsa->tdb_dst,
headers[SADB_EXT_ADDRESS_DST]);
import_address((struct sockaddr *) &newsa->tdb_proxy,
headers[SADB_EXT_ADDRESS_PROXY]);
import_lifetime(newsa,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_key(&ii, headers[SADB_EXT_KEY_AUTH],
PFKEYV2_AUTHENTICATION_KEY);
import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
PFKEYV2_ENCRYPTION_KEY);
import_identity(newsa, headers[SADB_EXT_IDENTITY_SRC],
PFKEYV2_IDENTITY_SRC);
import_identity(newsa, headers[SADB_EXT_IDENTITY_DST],
PFKEYV2_IDENTITY_DST);
import_credentials(newsa,
headers[SADB_X_EXT_LOCAL_CREDENTIALS],
PFKEYV2_CRED_LOCAL);
import_credentials(newsa,
headers[SADB_X_EXT_REMOTE_CREDENTIALS],
PFKEYV2_CRED_REMOTE);
import_auth(newsa, headers[SADB_X_EXT_LOCAL_AUTH],
PFKEYV2_AUTH_LOCAL);
import_auth(newsa, headers[SADB_X_EXT_REMOTE_AUTH],
PFKEYV2_AUTH_REMOTE);
import_flow(&newsa->tdb_filter, &newsa->tdb_filtermask,
headers[SADB_X_EXT_SRC_FLOW],
headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW],
headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL],
headers[SADB_X_EXT_FLOW_TYPE]);
import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
#if NPF > 0
import_tag(newsa, headers[SADB_X_EXT_TAG]);
#endif
headers[SADB_EXT_KEY_AUTH] = NULL;
headers[SADB_EXT_KEY_ENCRYPT] = NULL;
headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
newsa->tdb_seq = smsg->sadb_msg_seq;
rval = tdb_init(newsa, alg, &ii);
if (rval) {
rval = EINVAL;
tdb_free(freeme);
freeme = NULL;
goto splxret;
}
newsa->tdb_cur_allocations = sa2->tdb_cur_allocations;
/* Delete old version of the SA, insert new one */
tdb_delete(sa2);
puttdb((struct tdb *) freeme);
sa2 = freeme = NULL;
} else {
/*
* The SA is already initialized, so we're only allowed to
* change lifetimes and some other information; we're
* not allowed to change keys, addresses or identities.
*/
if (headers[SADB_EXT_ADDRESS_PROXY] ||
headers[SADB_EXT_KEY_AUTH] ||
headers[SADB_EXT_KEY_ENCRYPT] ||
headers[SADB_EXT_IDENTITY_SRC] ||
headers[SADB_EXT_IDENTITY_DST] ||
headers[SADB_EXT_SENSITIVITY]) {
rval = EINVAL;
goto splxret;
}
import_sa(sa2, headers[SADB_EXT_SA], NULL);
import_lifetime(sa2,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]);
#if NPF > 0
import_tag(sa2, headers[SADB_X_EXT_TAG]);
#endif
}
splx(s);
break;
case SADB_ADD:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
/* Either all or none of the flow must be included */
if ((headers[SADB_X_EXT_SRC_FLOW] ||
headers[SADB_X_EXT_PROTOCOL] ||
headers[SADB_X_EXT_FLOW_TYPE] ||
headers[SADB_X_EXT_DST_FLOW] ||
headers[SADB_X_EXT_SRC_MASK] ||
headers[SADB_X_EXT_DST_MASK]) &&
!(headers[SADB_X_EXT_SRC_FLOW] &&
headers[SADB_X_EXT_PROTOCOL] &&
headers[SADB_X_EXT_FLOW_TYPE] &&
headers[SADB_X_EXT_DST_FLOW] &&
headers[SADB_X_EXT_SRC_MASK] &&
headers[SADB_X_EXT_DST_MASK])) {
rval = EINVAL;
goto ret;
}
#ifdef IPSEC
/* UDP encap has to be enabled and is only supported for ESP */
if (headers[SADB_X_EXT_UDPENCAP] &&
(!udpencap_enable ||
smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
rval = EINVAL;
goto ret;
}
#endif /* IPSEC */
s = spltdb();
sa2 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
/* We can't add an existing SA! */
if (sa2 != NULL) {
rval = EEXIST;
goto splxret;
}
/* We can only add "mature" SAs */
if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) {
rval = EINVAL;
goto splxret;
}
/* Allocate and initialize new TDB */
freeme = tdb_alloc();
{
struct tdb *newsa = (struct tdb *) freeme;
struct ipsecinit ii;
int alg;
bzero(&ii, sizeof(struct ipsecinit));
newsa->tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
&newsa->tdb_sproto, &alg))) {
tdb_free(freeme);
freeme = NULL;
goto splxret;
}
import_sa(newsa, headers[SADB_EXT_SA], &ii);
import_address((struct sockaddr *) &newsa->tdb_src,
headers[SADB_EXT_ADDRESS_SRC]);
import_address((struct sockaddr *) &newsa->tdb_dst,
headers[SADB_EXT_ADDRESS_DST]);
import_address((struct sockaddr *) &newsa->tdb_proxy,
headers[SADB_EXT_ADDRESS_PROXY]);
import_lifetime(newsa,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_key(&ii, headers[SADB_EXT_KEY_AUTH],
PFKEYV2_AUTHENTICATION_KEY);
import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
PFKEYV2_ENCRYPTION_KEY);
import_identity(newsa, headers[SADB_EXT_IDENTITY_SRC],
PFKEYV2_IDENTITY_SRC);
import_identity(newsa, headers[SADB_EXT_IDENTITY_DST],
PFKEYV2_IDENTITY_DST);
import_credentials(newsa,
headers[SADB_X_EXT_LOCAL_CREDENTIALS],
PFKEYV2_CRED_LOCAL);
import_credentials(newsa,
headers[SADB_X_EXT_REMOTE_CREDENTIALS],
PFKEYV2_CRED_REMOTE);
import_auth(newsa, headers[SADB_X_EXT_LOCAL_AUTH],
PFKEYV2_AUTH_LOCAL);
import_auth(newsa, headers[SADB_X_EXT_REMOTE_AUTH],
PFKEYV2_AUTH_REMOTE);
import_flow(&newsa->tdb_filter, &newsa->tdb_filtermask,
headers[SADB_X_EXT_SRC_FLOW],
headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW],
headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL],
headers[SADB_X_EXT_FLOW_TYPE]);
import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
#if NPF > 0
import_tag(newsa, headers[SADB_X_EXT_TAG]);
#endif
headers[SADB_EXT_KEY_AUTH] = NULL;
headers[SADB_EXT_KEY_ENCRYPT] = NULL;
headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
newsa->tdb_seq = smsg->sadb_msg_seq;
rval = tdb_init(newsa, alg, &ii);
if (rval) {
rval = EINVAL;
tdb_free(freeme);
freeme = NULL;
goto splxret;
}
}
/* Add TDB in table */
puttdb((struct tdb *) freeme);
splx(s);
freeme = NULL;
break;
case SADB_DELETE:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp =
(union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
s = spltdb();
sa2 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (sa2 == NULL) {
rval = ESRCH;
goto splxret;
}
tdb_delete(sa2);
splx(s);
sa2 = NULL;
break;
case SADB_X_ASKPOLICY:
/* Get the relevant policy */
ipa = ipsec_get_acquire(((struct sadb_x_policy *) headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq);
if (ipa == NULL) {
rval = ESRCH;
goto ret;
}
rval = pfkeyv2_policy(ipa, headers, &freeme);
if (rval)
mode = PFKEYV2_SENDMESSAGE_UNICAST;
break;
case SADB_GET:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp =
(union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
s = spltdb();
sa2 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (sa2 == NULL) {
rval = ESRCH;
goto splxret;
}
rval = pfkeyv2_get(sa2, headers, &freeme, NULL);
if (rval)
mode = PFKEYV2_SENDMESSAGE_UNICAST;
splx(s);
break;
case SADB_REGISTER:
if (!(pfkeyv2_socket->flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) {
pfkeyv2_socket->flags |= PFKEYV2_SOCKETFLAGS_REGISTERED;
nregistered++;
}
i = sizeof(struct sadb_supported) + sizeof(ealgs);
if (!(freeme = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
bzero(freeme, i);
ssup = (struct sadb_supported *) freeme;
ssup->sadb_supported_len = i / sizeof(uint64_t);
{
void *p = freeme + sizeof(struct sadb_supported);
bcopy(&ealgs[0], p, sizeof(ealgs));
}
headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme;
i = sizeof(struct sadb_supported) + sizeof(aalgs);
if (!(freeme = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
/* Keep track what this socket has registered for */
pfkeyv2_socket->registration |= (1 << ((struct sadb_msg *)message)->sadb_msg_satype);
bzero(freeme, i);
ssup = (struct sadb_supported *) freeme;
ssup->sadb_supported_len = i / sizeof(uint64_t);
{
void *p = freeme + sizeof(struct sadb_supported);
bcopy(&aalgs[0], p, sizeof(aalgs));
}
headers[SADB_EXT_SUPPORTED_AUTH] = freeme;
i = sizeof(struct sadb_supported) + sizeof(calgs);
if (!(freeme = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
bzero(freeme, i);
ssup = (struct sadb_supported *) freeme;
ssup->sadb_supported_len = i / sizeof(uint64_t);
{
void *p = freeme + sizeof(struct sadb_supported);
bcopy(&calgs[0], p, sizeof(calgs));
}
headers[SADB_X_EXT_SUPPORTED_COMP] = freeme;
break;
case SADB_ACQUIRE:
case SADB_EXPIRE:
/* Nothing to handle */
rval = 0;
break;
case SADB_FLUSH:
rval = 0;
switch (smsg->sadb_msg_satype) {
case SADB_SATYPE_UNSPEC:
s = spltdb();
/*
* Go through the list of policies, delete those that
* are not socket-attached.
*/
for (ipo = TAILQ_FIRST(&ipsec_policy_head);
ipo != NULL; ipo = tmpipo) {
tmpipo = TAILQ_NEXT(ipo, ipo_list);
if (!(ipo->ipo_flags & IPSP_POLICY_SOCKET))
ipsec_delete_policy(ipo);
}
splx(s);
/* FALLTHROUGH */
case SADB_SATYPE_AH:
case SADB_SATYPE_ESP:
case SADB_X_SATYPE_IPIP:
case SADB_X_SATYPE_IPCOMP:
#ifdef TCP_SIGNATURE
case SADB_X_SATYPE_TCPSIGNATURE:
#endif /* TCP_SIGNATURE */
s = spltdb();
tdb_walk(pfkeyv2_flush_walker,
(u_int8_t *) &(smsg->sadb_msg_satype));
splx(s);
break;
default:
rval = EINVAL; /* Unknown/unsupported type */
}
break;
case SADB_DUMP:
{
struct dump_state dump_state;
dump_state.sadb_msg = (struct sadb_msg *) headers[0];
dump_state.socket = socket;
s = spltdb();
rval = tdb_walk(pfkeyv2_dump_walker, &dump_state);
splx(s);
if (!rval)
goto realret;
if ((rval == ENOMEM) || (rval == ENOBUFS))
rval = 0;
}
break;
case SADB_X_GRPSPIS:
{
struct tdb *tdb1, *tdb2, *tdb3;
struct sadb_protocol *sa_proto;
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
s = spltdb();
tdb1 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (tdb1 == NULL) {
rval = ESRCH;
goto splxret;
}
ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2];
sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] +
sizeof(struct sadb_address));
sa_proto = ((struct sadb_protocol *) headers[SADB_X_EXT_PROTOCOL]);
tdb2 = gettdb(ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto));
if (tdb2 == NULL) {
rval = ESRCH;
goto splxret;
}
/* Detect cycles */
for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext)
if (tdb3 == tdb1) {
rval = ESRCH;
goto splxret;
}
/* Maintenance */
if ((tdb1->tdb_onext) &&
(tdb1->tdb_onext->tdb_inext == tdb1))
tdb1->tdb_onext->tdb_inext = NULL;
if ((tdb2->tdb_inext) &&
(tdb2->tdb_inext->tdb_onext == tdb2))
tdb2->tdb_inext->tdb_onext = NULL;
/* Link them */
tdb1->tdb_onext = tdb2;
tdb2->tdb_inext = tdb1;
splx(s);
}
break;
case SADB_X_DELFLOW:
delflag = 1;
/*FALLTHROUGH*/
case SADB_X_ADDFLOW:
{
struct sadb_protocol *sab;
union sockaddr_union *ssrc;
struct route_enc re;
int exists = 0;
sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE];
if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) &&
(sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) {
rval = EINVAL;
goto ret;
}
/* If the security protocol wasn't specified, pretend it was ESP */
if (smsg->sadb_msg_satype == 0)
smsg->sadb_msg_satype = SADB_SATYPE_ESP;
if (headers[SADB_EXT_ADDRESS_DST])
sunionp = (union sockaddr_union *)
(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
else
sunionp = NULL;
if (headers[SADB_EXT_ADDRESS_SRC])
ssrc = (union sockaddr_union *)
(headers[SADB_EXT_ADDRESS_SRC] +
sizeof(struct sadb_address));
else
ssrc = NULL;
import_flow(&encapdst, &encapnetmask,
headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL], headers[SADB_X_EXT_FLOW_TYPE]);
/* Determine whether the exact same SPD entry already exists. */
bzero(&encapgw, sizeof(struct sockaddr_encap));
bzero(&re, sizeof(struct route_enc));
bcopy(&encapdst, &re.re_dst, sizeof(struct sockaddr_encap));
s = spltdb();
rtalloc((struct route *) &re);
if (re.re_rt != NULL) {
ipo = ((struct sockaddr_encap *) re.re_rt->rt_gateway)->sen_ipsp;
RTFREE(re.re_rt);
/* Verify that the entry is identical */
if (bcmp(&ipo->ipo_addr, &encapdst,
sizeof(struct sockaddr_encap)) ||
bcmp(&ipo->ipo_mask, &encapnetmask,
sizeof(struct sockaddr_encap)))
ipo = NULL; /* Fall through */
else
exists = 1;
} else
ipo = NULL;
/*
* If the existing policy is static, only delete or update
* it if the new one is also static.
*/
if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) {
if (!(sab->sadb_protocol_flags &
SADB_X_POLICYFLAGS_POLICY)) {
splx(s);
goto ret;
}
}
/* Delete ? */
if (delflag) {
if (exists) {
rval = ipsec_delete_policy(ipo);
splx(s);
goto ret;
}
/* If we were asked to delete something non-existant, error. */
splx(s);
rval = ESRCH;
break;
}
if (!exists) {
if (ipsec_policy_pool_initialized == 0) {
ipsec_policy_pool_initialized = 1;
pool_init(&ipsec_policy_pool,
sizeof(struct ipsec_policy), 0, 0, 0,
"ipsec policy", NULL);
}
/* Allocate policy entry */
ipo = pool_get(&ipsec_policy_pool, 0);
if (ipo == NULL) {
splx(s);
rval = ENOMEM;
goto ret;
}
bzero(ipo, sizeof(struct ipsec_policy));
ipo->ipo_ref_count = 1;
TAILQ_INIT(&ipo->ipo_acquires);
/* Finish initialization of SPD entry */
encapgw.sen_len = SENT_LEN;
encapgw.sen_family = PF_KEY;
encapgw.sen_type = SENT_IPSP;
encapgw.sen_ipsp = ipo;
/* Initialize policy entry */
bcopy(&encapdst, &ipo->ipo_addr,
sizeof(struct sockaddr_encap));
bcopy(&encapnetmask, &ipo->ipo_mask,
sizeof(struct sockaddr_encap));
}
switch (((struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE])->sadb_protocol_proto) {
case SADB_X_FLOW_TYPE_USE:
ipo->ipo_type = IPSP_IPSEC_USE;
break;
case SADB_X_FLOW_TYPE_ACQUIRE:
ipo->ipo_type = IPSP_IPSEC_ACQUIRE;
break;
case SADB_X_FLOW_TYPE_REQUIRE:
ipo->ipo_type = IPSP_IPSEC_REQUIRE;
break;
case SADB_X_FLOW_TYPE_DENY:
ipo->ipo_type = IPSP_DENY;
break;
case SADB_X_FLOW_TYPE_BYPASS:
ipo->ipo_type = IPSP_PERMIT;
break;
case SADB_X_FLOW_TYPE_DONTACQ:
ipo->ipo_type = IPSP_IPSEC_DONTACQ;
break;
default:
if (!exists)
pool_put(&ipsec_policy_pool, ipo);
else
ipsec_delete_policy(ipo);
splx(s);
rval = EINVAL;
goto ret;
}
if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY)
ipo->ipo_flags |= IPSP_POLICY_STATIC;
if (sunionp)
bcopy(sunionp, &ipo->ipo_dst,
sizeof(union sockaddr_union));
else
bzero(&ipo->ipo_dst, sizeof(union sockaddr_union));
if (ssrc)
bcopy(ssrc, &ipo->ipo_src,
sizeof(union sockaddr_union));
else
bzero(&ipo->ipo_src, sizeof(union sockaddr_union));
ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype);
if (ipo->ipo_srcid) {
ipsp_reffree(ipo->ipo_srcid);
ipo->ipo_srcid = NULL;
}
if (ipo->ipo_dstid) {
ipsp_reffree(ipo->ipo_dstid);
ipo->ipo_dstid = NULL;
}
if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL) {
int clen = (sid->sadb_ident_len * sizeof(u_int64_t)) -
sizeof(struct sadb_ident);
MALLOC(ipo->ipo_srcid, struct ipsec_ref *, clen +
sizeof(struct ipsec_ref), M_CREDENTIALS, M_DONTWAIT);
if (ipo->ipo_srcid == NULL) {
if (exists)
ipsec_delete_policy(ipo);
else
pool_put(&ipsec_policy_pool, ipo);
splx(s);
rval = ENOBUFS;
goto ret;
}
ipo->ipo_srcid->ref_type = sid->sadb_ident_type;
ipo->ipo_srcid->ref_len = clen;
ipo->ipo_srcid->ref_count = 1;
ipo->ipo_srcid->ref_malloctype = M_CREDENTIALS;
bcopy(sid + 1, ipo->ipo_srcid + 1, ipo->ipo_srcid->ref_len);
}
if ((sid = headers[SADB_EXT_IDENTITY_DST]) != NULL) {
int clen = (sid->sadb_ident_len * sizeof(u_int64_t)) -
sizeof(struct sadb_ident);
MALLOC(ipo->ipo_dstid, struct ipsec_ref *,
clen + sizeof(struct ipsec_ref),
M_CREDENTIALS, M_DONTWAIT);
if (ipo->ipo_dstid == NULL) {
if (exists)
ipsec_delete_policy(ipo);
else {
if (ipo->ipo_dstid)
ipsp_reffree(ipo->ipo_dstid);
pool_put(&ipsec_policy_pool, ipo);
}
splx(s);
rval = ENOBUFS;
goto ret;
}
ipo->ipo_dstid->ref_type = sid->sadb_ident_type;
ipo->ipo_dstid->ref_len = clen;
ipo->ipo_dstid->ref_count = 1;
ipo->ipo_dstid->ref_malloctype = M_CREDENTIALS;
bcopy(sid + 1, ipo->ipo_dstid + 1,
ipo->ipo_dstid->ref_len);
}
/* Flow type */
if (!exists) {
/* Add SPD entry */
if ((rval = rtrequest(RTM_ADD,
(struct sockaddr *) &encapdst,
(struct sockaddr *) &encapgw,
(struct sockaddr *) &encapnetmask,
RTF_UP | RTF_GATEWAY | RTF_STATIC,
(struct rtentry **) 0, 0)) != 0) {
/* Remove from linked list of policies on TDB */
if (ipo->ipo_tdb)
TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head,
ipo, ipo_tdb_next);
if (ipo->ipo_srcid)
ipsp_reffree(ipo->ipo_srcid);
if (ipo->ipo_dstid)
ipsp_reffree(ipo->ipo_dstid);
pool_put(&ipsec_policy_pool, ipo);
splx(s);
goto ret;
}
TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list);
ipsec_in_use++;
} else {
ipo->ipo_last_searched = ipo->ipo_flags = 0;
}
splx(s);
}
break;
case SADB_X_PROMISC:
if (len >= 2 * sizeof(struct sadb_msg)) {
struct mbuf *packet;
if ((rval = pfdatatopacket(message, len, &packet)) != 0)
goto ret;
for (so = pfkeyv2_sockets; so; so = so->next)
if ((so != pfkeyv2_socket) &&
(!smsg->sadb_msg_seq ||
(smsg->sadb_msg_seq == pfkeyv2_socket->pid)))
pfkey_sendup(so->socket, packet, 1);
m_freem(packet);
} else {
if (len != sizeof(struct sadb_msg)) {
rval = EINVAL;
goto ret;
}
i = (pfkeyv2_socket->flags &
PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0;
j = smsg->sadb_msg_satype ? 1 : 0;
if (i ^ j) {
if (j) {
pfkeyv2_socket->flags |=
PFKEYV2_SOCKETFLAGS_PROMISC;
npromisc++;
} else {
pfkeyv2_socket->flags &=
~PFKEYV2_SOCKETFLAGS_PROMISC;
npromisc--;
}
}
}
break;
default:
rval = EINVAL;
goto ret;
}
ret:
if (rval) {
if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS))
goto realret;
for (i = 1; i <= SADB_EXT_MAX; i++)
headers[i] = NULL;
smsg->sadb_msg_errno = abs(rval);
} else {
uint64_t seen = 0LL;
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
seen |= (1LL << i);
if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type])
!= seen)
goto realret;
if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) !=
sadb_exts_required_out[smsg->sadb_msg_type])
goto realret;
}
rval = pfkeyv2_sendmessage(headers, mode, socket, 0, 0);
realret:
if (freeme)
free(freeme, M_PFKEY);
free(message, M_PFKEY);
return (rval);
splxret:
splx(s);
goto ret;
}
/*
* Send an ACQUIRE message to key management, to get a new SA.
*/
int
pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw,
union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst)
{
void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL;
struct sadb_ident *srcid, *dstid;
struct sadb_x_cred *lcred, *lauth;
struct sadb_comb *sadb_comb;
struct sadb_address *sadd;
struct sadb_prop *sa_prop;
struct sadb_msg *smsg;
int rval = 0;
int i, j;
*seq = pfkeyv2_seq++;
if (!nregistered) {
rval = ESRCH;
goto ret;
}
/* How large a buffer do we need... XXX we only do one proposal for now */
i = sizeof(struct sadb_msg) +
(laddr == NULL ? 0 : sizeof(struct sadb_address) +
PADUP(SA_LEN(&ipo->ipo_src.sa))) +
sizeof(struct sadb_address) + PADUP(SA_LEN(&gw->sa)) +
sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb);
if (ipo->ipo_srcid)
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_srcid->ref_len);
if (ipo->ipo_dstid)
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_dstid->ref_len);
if (ipo->ipo_local_cred)
i += sizeof(struct sadb_x_cred) + PADUP(ipo->ipo_local_cred->ref_len);
if (ipo->ipo_local_auth)
i += sizeof(struct sadb_x_cred) + PADUP(ipo->ipo_local_auth->ref_len);
/* Allocate */
if (!(p = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
bzero(headers, sizeof(headers));
buffer = p;
bzero(p, i);
headers[0] = p;
p += sizeof(struct sadb_msg);
smsg = (struct sadb_msg *) headers[0];
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_ACQUIRE;
smsg->sadb_msg_len = i / sizeof(uint64_t);
smsg->sadb_msg_seq = *seq;
if (ipo->ipo_sproto == IPPROTO_ESP)
smsg->sadb_msg_satype = SADB_SATYPE_ESP;
else if (ipo->ipo_sproto == IPPROTO_AH)
smsg->sadb_msg_satype = SADB_SATYPE_AH;
else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
if (laddr) {
headers[SADB_EXT_ADDRESS_SRC] = p;
p += sizeof(struct sadb_address) + PADUP(SA_LEN(&laddr->sa));
sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC];
sadd->sadb_address_len = (sizeof(struct sadb_address) +
SA_LEN(&laddr->sa) + sizeof(uint64_t) - 1) /
sizeof(uint64_t);
bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] +
sizeof(struct sadb_address), SA_LEN(&laddr->sa));
}
headers[SADB_EXT_ADDRESS_DST] = p;
p += sizeof(struct sadb_address) + PADUP(SA_LEN(&gw->sa));
sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST];
sadd->sadb_address_len = (sizeof(struct sadb_address) +
SA_LEN(&gw->sa) + sizeof(uint64_t) - 1) / sizeof(uint64_t);
bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address),
SA_LEN(&gw->sa));
if (ipo->ipo_srcid) {
headers[SADB_EXT_IDENTITY_SRC] = p;
p += sizeof(struct sadb_ident) + PADUP(ipo->ipo_srcid->ref_len);
srcid = (struct sadb_ident *) headers[SADB_EXT_IDENTITY_SRC];
srcid->sadb_ident_len = (sizeof(struct sadb_ident) +
PADUP(ipo->ipo_srcid->ref_len)) / sizeof(u_int64_t);
srcid->sadb_ident_type = ipo->ipo_srcid->ref_type;
bcopy(ipo->ipo_srcid + 1, headers[SADB_EXT_IDENTITY_SRC] +
sizeof(struct sadb_ident), ipo->ipo_srcid->ref_len);
}
if (ipo->ipo_dstid) {
headers[SADB_EXT_IDENTITY_DST] = p;
p += sizeof(struct sadb_ident) + PADUP(ipo->ipo_dstid->ref_len);
dstid = (struct sadb_ident *) headers[SADB_EXT_IDENTITY_DST];
dstid->sadb_ident_len = (sizeof(struct sadb_ident) +
PADUP(ipo->ipo_dstid->ref_len)) / sizeof(u_int64_t);
dstid->sadb_ident_type = ipo->ipo_dstid->ref_type;
bcopy(ipo->ipo_dstid + 1, headers[SADB_EXT_IDENTITY_DST] +
sizeof(struct sadb_ident), ipo->ipo_dstid->ref_len);
}
if (ipo->ipo_local_cred) {
headers[SADB_X_EXT_LOCAL_CREDENTIALS] = p;
p += sizeof(struct sadb_x_cred) + PADUP(ipo->ipo_local_cred->ref_len);
lcred = (struct sadb_x_cred *) headers[SADB_X_EXT_LOCAL_CREDENTIALS];
lcred->sadb_x_cred_len = (sizeof(struct sadb_x_cred) +
PADUP(ipo->ipo_local_cred->ref_len)) / sizeof(u_int64_t);
switch (ipo->ipo_local_cred->ref_type) {
case IPSP_CRED_KEYNOTE:
lcred->sadb_x_cred_type = SADB_X_CREDTYPE_KEYNOTE;
break;
case IPSP_CRED_X509:
lcred->sadb_x_cred_type = SADB_X_CREDTYPE_X509;
break;
}
bcopy(ipo->ipo_local_cred + 1, headers[SADB_X_EXT_LOCAL_CREDENTIALS] +
sizeof(struct sadb_x_cred), ipo->ipo_local_cred->ref_len);
}
if (ipo->ipo_local_auth) {
headers[SADB_X_EXT_LOCAL_AUTH] = p;
p += sizeof(struct sadb_x_cred) + PADUP(ipo->ipo_local_auth->ref_len);
lauth = (struct sadb_x_cred *) headers[SADB_X_EXT_LOCAL_AUTH];
lauth->sadb_x_cred_len = (sizeof(struct sadb_x_cred) +
PADUP(ipo->ipo_local_auth->ref_len)) / sizeof(u_int64_t);
switch (ipo->ipo_local_auth->ref_type) {
case IPSP_AUTH_PASSPHRASE:
lauth->sadb_x_cred_type = SADB_X_AUTHTYPE_PASSPHRASE;
break;
case IPSP_AUTH_RSA:
lauth->sadb_x_cred_type = SADB_X_AUTHTYPE_RSA;
break;
}
bcopy(ipo->ipo_local_auth + 1, headers[SADB_X_EXT_LOCAL_AUTH] +
sizeof(struct sadb_x_cred), ipo->ipo_local_auth->ref_len);
}
headers[SADB_EXT_PROPOSAL] = p;
p += sizeof(struct sadb_prop);
sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL];
sa_prop->sadb_prop_num = 1; /* XXX One proposal only */
sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) +
(sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) /
sizeof(uint64_t);
sadb_comb = p;
/* XXX Should actually ask the crypto layer what's supported */
for (j = 0; j < sa_prop->sadb_prop_num; j++) {
sadb_comb->sadb_comb_flags = 0;
if (ipsec_require_pfs)
sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS;
/* Set the encryption algorithm */
if (ipo->ipo_sproto == IPPROTO_ESP) {
if (!strncasecmp(ipsec_def_enc, "aes",
sizeof("aes"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES;
sadb_comb->sadb_comb_encrypt_minbits = 128;
sadb_comb->sadb_comb_encrypt_maxbits = 256;
} else if (!strncasecmp(ipsec_def_enc, "aesctr",
sizeof("aesctr"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR;
sadb_comb->sadb_comb_encrypt_minbits = 128+32;
sadb_comb->sadb_comb_encrypt_maxbits = 256+32;
} else if (!strncasecmp(ipsec_def_enc, "3des",
sizeof("3des"))) {
sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC;
sadb_comb->sadb_comb_encrypt_minbits = 192;
sadb_comb->sadb_comb_encrypt_maxbits = 192;
} else if (!strncasecmp(ipsec_def_enc, "des",
sizeof("des"))) {
sadb_comb->sadb_comb_encrypt = SADB_EALG_DESCBC;
sadb_comb->sadb_comb_encrypt_minbits = 64;
sadb_comb->sadb_comb_encrypt_maxbits = 64;
} else if (!strncasecmp(ipsec_def_enc, "blowfish",
sizeof("blowfish"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF;
sadb_comb->sadb_comb_encrypt_minbits = 40;
sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8;
} else if (!strncasecmp(ipsec_def_enc, "skipjack",
sizeof("skipjack"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_SKIPJACK;
sadb_comb->sadb_comb_encrypt_minbits = 80;
sadb_comb->sadb_comb_encrypt_maxbits = 80;
} else if (!strncasecmp(ipsec_def_enc, "cast128",
sizeof("cast128"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST;
sadb_comb->sadb_comb_encrypt_minbits = 40;
sadb_comb->sadb_comb_encrypt_maxbits = 128;
}
} else if (ipo->ipo_sproto == IPPROTO_IPCOMP) {
/* Set the compression algorithm */
if (!strncasecmp(ipsec_def_comp, "deflate",
sizeof("deflate"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE;
sadb_comb->sadb_comb_encrypt_minbits = 0;
sadb_comb->sadb_comb_encrypt_maxbits = 0;
} else if (!strncasecmp(ipsec_def_comp, "lzs",
sizeof("lzs"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_CALG_LZS;
sadb_comb->sadb_comb_encrypt_minbits = 0;
sadb_comb->sadb_comb_encrypt_maxbits = 0;
}
}
/* Set the authentication algorithm */
if (!strncasecmp(ipsec_def_auth, "hmac-sha1",
sizeof("hmac-sha1"))) {
sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC;
sadb_comb->sadb_comb_auth_minbits = 160;
sadb_comb->sadb_comb_auth_maxbits = 160;
} else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160",
sizeof("hmac_ripemd160"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC;
sadb_comb->sadb_comb_auth_minbits = 160;
sadb_comb->sadb_comb_auth_maxbits = 160;
} else if (!strncasecmp(ipsec_def_auth, "hmac-md5",
sizeof("hmac-md5"))) {
sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC;
sadb_comb->sadb_comb_auth_minbits = 128;
sadb_comb->sadb_comb_auth_maxbits = 128;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256",
sizeof("hmac-sha2-256"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256;
sadb_comb->sadb_comb_auth_minbits = 256;
sadb_comb->sadb_comb_auth_maxbits = 256;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384",
sizeof("hmac-sha2-384"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384;
sadb_comb->sadb_comb_auth_minbits = 384;
sadb_comb->sadb_comb_auth_maxbits = 384;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512",
sizeof("hmac-sha2-512"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512;
sadb_comb->sadb_comb_auth_minbits = 512;
sadb_comb->sadb_comb_auth_maxbits = 512;
}
sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations;
sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations;
sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes;
sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes;
sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout;
sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout;
sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use;
sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use;
sadb_comb++;
}
/* Send the ACQUIRE message to all compliant registered listeners. */
if ((rval = pfkeyv2_sendmessage(headers,
PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0))
!= 0)
goto ret;
rval = 0;
ret:
if (buffer != NULL) {
bzero(buffer, i);
free(buffer, M_PFKEY);
}
return (rval);
}
/*
* Notify key management that an expiration went off. The second argument
* specifies the type of expiration (soft or hard).
*/
int
pfkeyv2_expire(struct tdb *sa, u_int16_t type)
{
void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL;
struct sadb_msg *smsg;
int rval = 0;
int i;
switch (sa->tdb_sproto) {
case IPPROTO_AH:
case IPPROTO_ESP:
case IPPROTO_IPIP:
case IPPROTO_IPCOMP:
#ifdef TCP_SIGNATURE
case IPPROTO_TCP:
#endif /* TCP_SIGNATURE */
break;
default:
rval = EOPNOTSUPP;
goto ret;
}
i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) +
2 * sizeof(struct sadb_lifetime) +
sizeof(struct sadb_address) + PADUP(SA_LEN(&sa->tdb_src.sa)) +
sizeof(struct sadb_address) + PADUP(SA_LEN(&sa->tdb_dst.sa));
if (!(p = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
}
bzero(headers, sizeof(headers));
buffer = p;
bzero(p, i);
headers[0] = p;
p += sizeof(struct sadb_msg);
smsg = (struct sadb_msg *) headers[0];
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_EXPIRE;
smsg->sadb_msg_satype = sa->tdb_satype;
smsg->sadb_msg_len = i / sizeof(uint64_t);
smsg->sadb_msg_seq = pfkeyv2_seq++;
headers[SADB_EXT_SA] = p;
export_sa(&p, sa);
headers[SADB_EXT_LIFETIME_CURRENT] = p;
export_lifetime(&p, sa, 2);
headers[type] = p;
export_lifetime(&p, sa, type == SADB_EXT_LIFETIME_SOFT ?
PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD);
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, (struct sockaddr *) &sa->tdb_src);
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, (struct sockaddr *) &sa->tdb_dst);
if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST,
NULL, 0, 0)) != 0)
goto ret;
rval = 0;
ret:
if (buffer != NULL) {
bzero(buffer, i);
free(buffer, M_PFKEY);
}
return (rval);
}
struct pfkeyv2_sysctl_walk {
void *w_where;
size_t w_len;
int w_op;
u_int8_t w_satype;
};
int
pfkeyv2_sysctl_walker(struct tdb *sa, void *arg, int last)
{
struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
void *buffer = NULL;
int error = 0;
int buflen, i;
if (w->w_satype != SADB_SATYPE_UNSPEC &&
w->w_satype != sa->tdb_satype)
return (0);
if (w->w_where) {
void *headers[SADB_EXT_MAX+1];
struct sadb_msg msg;
bzero(headers, sizeof(headers));
if ((error = pfkeyv2_get(sa, headers, &buffer, &buflen)) != 0)
goto done;
if (w->w_len < sizeof(msg) + buflen) {
error = ENOMEM;
goto done;
}
/* prepend header */
bzero(&msg, sizeof(msg));
msg.sadb_msg_version = PF_KEY_V2;
msg.sadb_msg_satype = sa->tdb_satype;
msg.sadb_msg_type = SADB_DUMP;
msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t);
if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
goto done;
w->w_where += sizeof(msg);
w->w_len -= sizeof(msg);
/* set extension type */
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
((struct sadb_ext *)
headers[i])->sadb_ext_type = i;
if ((error = copyout(buffer, w->w_where, buflen)) != 0)
goto done;
w->w_where += buflen;
w->w_len -= buflen;
} else {
if ((error = pfkeyv2_get(sa, NULL, NULL, &buflen)) != 0)
return (error);
w->w_len += buflen;
w->w_len += sizeof(struct sadb_msg);
}
done:
if (buffer)
free(buffer, M_PFKEY);
return (error);
}
int
pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer,
int *lenp)
{
struct sadb_ident *ident;
int i, rval, perm;
void *p;
/* Find how much space we need. */
i = 2 * sizeof(struct sadb_protocol);
/* We'll need four of them: src, src mask, dst, dst mask. */
switch (ipo->ipo_addr.sen_type) {
#ifdef INET
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET */
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
/* Local address, might be zeroed. */
switch (ipo->ipo_src.sa.sa_family) {
case 0:
break;
#ifdef INET
case AF_INET:
i += PADUP(sizeof(struct sockaddr_in));
i += sizeof(struct sadb_address);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
i += PADUP(sizeof(struct sockaddr_in6));
i += sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
/* Remote address, might be zeroed. XXX ??? */
switch (ipo->ipo_dst.sa.sa_family) {
case 0:
break;
#ifdef INET
case AF_INET:
i += PADUP(sizeof(struct sockaddr_in));
i += sizeof(struct sadb_address);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
i += PADUP(sizeof(struct sockaddr_in6));
i += sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
if (ipo->ipo_srcid)
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_srcid->ref_len);
if (ipo->ipo_dstid)
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_dstid->ref_len);
if (lenp)
*lenp = i;
if (buffer == NULL) {
rval = 0;
goto ret;
}
if (!(p = malloc(i, M_PFKEY, M_DONTWAIT))) {
rval = ENOMEM;
goto ret;
} else {
*buffer = p;
bzero(p, i);
}
/* Local address. */
if (ipo->ipo_src.sa.sa_family) {
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, (struct sockaddr *)&ipo->ipo_src);
}
/* Remote address. */
if (ipo->ipo_dst.sa.sa_family) {
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, (struct sockaddr *)&ipo->ipo_dst);
}
/* Get actual flow. */
export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask,
headers);
/* Add ids only when we are root. */
perm = suser(curproc, 0);
if (perm == 0 && ipo->ipo_srcid) {
headers[SADB_EXT_IDENTITY_SRC] = p;
p += sizeof(struct sadb_ident) + PADUP(ipo->ipo_srcid->ref_len);
ident = (struct sadb_ident *)headers[SADB_EXT_IDENTITY_SRC];
ident->sadb_ident_len = (sizeof(struct sadb_ident) +
PADUP(ipo->ipo_srcid->ref_len)) / sizeof(uint64_t);
ident->sadb_ident_type = ipo->ipo_srcid->ref_type;
bcopy(ipo->ipo_srcid + 1, headers[SADB_EXT_IDENTITY_SRC] +
sizeof(struct sadb_ident), ipo->ipo_srcid->ref_len);
}
if (perm == 0 && ipo->ipo_dstid) {
headers[SADB_EXT_IDENTITY_DST] = p;
p += sizeof(struct sadb_ident) + PADUP(ipo->ipo_dstid->ref_len);
ident = (struct sadb_ident *)headers[SADB_EXT_IDENTITY_DST];
ident->sadb_ident_len = (sizeof(struct sadb_ident) +
PADUP(ipo->ipo_dstid->ref_len)) / sizeof(uint64_t);
ident->sadb_ident_type = ipo->ipo_dstid->ref_type;
bcopy(ipo->ipo_dstid + 1, headers[SADB_EXT_IDENTITY_DST] +
sizeof(struct sadb_ident), ipo->ipo_dstid->ref_len);
}
rval = 0;
ret:
return (rval);
}
/*
* Caller is responsible for setting at least spltdb().
*/
int
pfkeyv2_ipo_walk(int (*walker)(struct ipsec_policy *, void *), void *arg)
{
int rval = 0;
struct ipsec_policy *ipo;
TAILQ_FOREACH(ipo, &ipsec_policy_head, ipo_list)
rval = walker(ipo, (void *)arg);
return (rval);
}
int
pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg)
{
struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
void *buffer = 0;
int i, buflen, error = 0;
/* Do not dump policies attached to a socket. */
if (ipo->ipo_flags & IPSP_POLICY_SOCKET)
return (0);
if (w->w_where) {
void *headers[SADB_EXT_MAX + 1];
struct sadb_msg msg;
bzero(headers, sizeof(headers));
if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer,
&buflen)) != 0)
goto done;
if (w->w_len < buflen) {
error = ENOMEM;
goto done;
}
/* prepend header */
bzero(&msg, sizeof(msg));
msg.sadb_msg_version = PF_KEY_V2;
if (ipo->ipo_sproto == IPPROTO_ESP)
msg.sadb_msg_satype = SADB_SATYPE_ESP;
else if (ipo->ipo_sproto == IPPROTO_AH)
msg.sadb_msg_satype = SADB_SATYPE_AH;
else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
else if (ipo->ipo_sproto == IPPROTO_IPIP)
msg.sadb_msg_satype = SADB_X_SATYPE_IPIP;
msg.sadb_msg_type = SADB_X_SPDDUMP;
msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t);
if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
goto done;
w->w_where += sizeof(msg);
w->w_len -= sizeof(msg);
/* set extension type */
for (i = 1; i < SADB_EXT_MAX; i++)
if (headers[i])
((struct sadb_ext *)
headers[i])->sadb_ext_type = i;
if ((error = copyout(buffer, w->w_where, buflen)) != 0)
goto done;
w->w_where += buflen;
w->w_len -= buflen;
} else {
if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL,
&buflen)) != 0)
goto done;
w->w_len += buflen;
w->w_len += sizeof(struct sadb_msg);
}
done:
if (buffer)
free(buffer, M_PFKEY);
return (error);
}
int
pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
void *new, size_t newlen)
{
struct pfkeyv2_sysctl_walk w;
int s, error = EINVAL;
if (new)
return (EPERM);
if (namelen < 1)
return (EINVAL);
w.w_op = name[0];
w.w_satype = name[1];
w.w_where = oldp;
w.w_len = oldp ? *oldlenp : 0;
switch(w.w_op) {
case NET_KEY_SADB_DUMP:
if ((error = suser(curproc, 0)) != 0)
return (error);
s = spltdb();
error = tdb_walk(pfkeyv2_sysctl_walker, &w);
splx(s);
if (oldp)
*oldlenp = w.w_where - oldp;
else
*oldlenp = w.w_len;
break;
case NET_KEY_SPD_DUMP:
s = spltdb();
error = pfkeyv2_ipo_walk(pfkeyv2_sysctl_policydumper, &w);
splx(s);
if (oldp)
*oldlenp = w.w_where - oldp;
else
*oldlenp = w.w_len;
break;
}
return (error);
}
int
pfkeyv2_init(void)
{
int rval;
bzero(&pfkeyv2_version, sizeof(struct pfkey_version));
pfkeyv2_version.protocol = PFKEYV2_PROTOCOL;
pfkeyv2_version.create = &pfkeyv2_create;
pfkeyv2_version.release = &pfkeyv2_release;
pfkeyv2_version.send = &pfkeyv2_send;
pfkeyv2_version.sysctl = &pfkeyv2_sysctl;
rval = pfkey_register(&pfkeyv2_version);
return (rval);
}
int
pfkeyv2_cleanup(void)
{
pfkey_unregister(&pfkeyv2_version);
return (0);
}