/* pfkey interface to the kernel's IPsec mechanism
* Copyright (C) 1997 Angelos D. Keromytis.
* Copyright (C) 1998-2002 D. Hugh Redelmeier.
* Copyright (C) 2003 Herbert Xu.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: kernel_pfkey.c 3252 2007-10-06 21:24:50Z andreas $
*/
#ifdef KLIPS
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <freeswan.h>
#include <pfkeyv2.h>
#include <pfkey.h>
#include "constants.h"
#include "defs.h"
#include "kernel.h"
#include "kernel_pfkey.h"
#include "log.h"
#include "whack.h" /* for RC_LOG_SERIOUS */
#include "demux.h"
#include "nat_traversal.h"
#include "alg_info.h"
#include "kernel_alg.h"
static int pfkeyfd = NULL_FD;
typedef u_int32_t pfkey_seq_t;
static pfkey_seq_t pfkey_seq = 0; /* sequence number for our PF_KEY messages */
static pid_t pid;
#define NE(x) { x, #x } /* Name Entry -- shorthand for sparse_names */
static sparse_names pfkey_type_names = {
NE(SADB_RESERVED),
NE(SADB_GETSPI),
NE(SADB_UPDATE),
NE(SADB_ADD),
NE(SADB_DELETE),
NE(SADB_GET),
NE(SADB_ACQUIRE),
NE(SADB_REGISTER),
NE(SADB_EXPIRE),
NE(SADB_FLUSH),
NE(SADB_DUMP),
NE(SADB_X_PROMISC),
NE(SADB_X_PCHANGE),
NE(SADB_X_GRPSA),
NE(SADB_X_ADDFLOW),
NE(SADB_X_DELFLOW),
NE(SADB_X_DEBUG),
NE(SADB_X_NAT_T_NEW_MAPPING),
NE(SADB_MAX),
{ 0, sparse_end }
};
#ifdef NEVER /* not needed yet */
static sparse_names pfkey_ext_names = {
NE(SADB_EXT_RESERVED),
NE(SADB_EXT_SA),
NE(SADB_EXT_LIFETIME_CURRENT),
NE(SADB_EXT_LIFETIME_HARD),
NE(SADB_EXT_LIFETIME_SOFT),
NE(SADB_EXT_ADDRESS_SRC),
NE(SADB_EXT_ADDRESS_DST),
NE(SADB_EXT_ADDRESS_PROXY),
NE(SADB_EXT_KEY_AUTH),
NE(SADB_EXT_KEY_ENCRYPT),
NE(SADB_EXT_IDENTITY_SRC),
NE(SADB_EXT_IDENTITY_DST),
NE(SADB_EXT_SENSITIVITY),
NE(SADB_EXT_PROPOSAL),
NE(SADB_EXT_SUPPORTED_AUTH),
NE(SADB_EXT_SUPPORTED_ENCRYPT),
NE(SADB_EXT_SPIRANGE),
NE(SADB_X_EXT_KMPRIVATE),
NE(SADB_X_EXT_SATYPE2),
NE(SADB_X_EXT_SA2),
NE(SADB_X_EXT_ADDRESS_DST2),
NE(SADB_X_EXT_ADDRESS_SRC_FLOW),
NE(SADB_X_EXT_ADDRESS_DST_FLOW),
NE(SADB_X_EXT_ADDRESS_SRC_MASK),
NE(SADB_X_EXT_ADDRESS_DST_MASK),
NE(SADB_X_EXT_DEBUG),
{ 0, sparse_end }
};
#endif /* NEVER */
#undef NE
void
init_pfkey(void)
{
pid = getpid();
/* open PF_KEY socket */
pfkeyfd = socket(PF_KEY, SOCK_RAW, PF_KEY_V2);
if (pfkeyfd == -1)
exit_log_errno((e, "socket() in init_pfkeyfd()"));
#ifdef NEVER /* apparently unsupported! */
if (fcntl(pfkeyfd, F_SETFL, O_NONBLOCK) != 0)
exit_log_errno((e, "fcntl(O_NONBLOCK) in init_pfkeyfd()"));
#endif
if (fcntl(pfkeyfd, F_SETFD, FD_CLOEXEC) != 0)
exit_log_errno((e, "fcntl(FD_CLOEXEC) in init_pfkeyfd()"));
DBG(DBG_KLIPS,
DBG_log("process %u listening for PF_KEY_V2 on file descriptor %d", (unsigned)pid, pfkeyfd));
}
/* Kinds of PF_KEY message from the kernel:
* - response to a request from us
* + ACK/NAK
* + Register: indicates transforms supported by kernel
* + SPI requested by getspi
* - Acquire, requesting us to deal with trapped clear packet
* - expiration of of one of our SAs
* - messages to other processes
*
* To minimize the effect on the event-driven structure of Pluto,
* responses are dealt with synchronously. We hope that the Kernel
* produces them synchronously. We must "read ahead" in the PF_KEY
* stream, saving Acquire and Expiry messages that are encountered.
* We ignore messages to other processes.
*/
typedef union {
unsigned char bytes[PFKEYv2_MAX_MSGSIZE];
struct sadb_msg msg;
} pfkey_buf;
/* queue of unprocessed PF_KEY messages input from kernel
* Note that the pfkey_buf may be partly allocated, reflecting
* the variable length nature of the messages. So the link field
* must come first.
*/
typedef struct pfkey_item {
struct pfkey_item *next;
pfkey_buf buf;
} pfkey_item;
static pfkey_item *pfkey_iq_head = NULL; /* oldest */
static pfkey_item *pfkey_iq_tail; /* youngest */
static bool
pfkey_input_ready(void)
{
fd_set readfds;
int ndes;
struct timeval tm;
tm.tv_sec = 0; /* don't wait at all */
tm.tv_usec = 0;
FD_ZERO(&readfds); /* we only care about pfkeyfd */
FD_SET(pfkeyfd, &readfds);
do {
ndes = select(pfkeyfd + 1, &readfds, NULL, NULL, &tm);
} while (ndes == -1 && errno == EINTR);
if (ndes < 0)
{
log_errno((e, "select() failed in pfkey_get()"));
return FALSE;
}
if (ndes == 0)
return FALSE; /* nothing to read */
passert(ndes == 1 && FD_ISSET(pfkeyfd, &readfds));
return TRUE;
}
/* get a PF_KEY message from kernel.
* Returns TRUE is message found, FALSE if no message pending,
* and aborts or keeps trying when an error is encountered.
* The only validation of the message is that the message length
* received matches that in the message header, and that the message
* is for this process.
*/
static bool
pfkey_get(pfkey_buf *buf)
{
for (;;)
{
/* len must be less than PFKEYv2_MAX_MSGSIZE,
* so it should fit in an int. We use this fact when printing it.
*/
ssize_t len;
if (!pfkey_input_ready())
return FALSE;
len = read(pfkeyfd, buf->bytes, sizeof(buf->bytes));
if (len < 0)
{
if (errno == EAGAIN)
return FALSE;
log_errno((e, "read() failed in pfkey_get()"));
return FALSE;
}
else if ((size_t) len < sizeof(buf->msg))
{
plog("pfkey_get read truncated PF_KEY message: %d bytes; ignoring message"
, (int) len);
}
else if ((size_t) len != buf->msg.sadb_msg_len * IPSEC_PFKEYv2_ALIGN)
{
plog("pfkey_get read PF_KEY message with length %d that doesn't equal sadb_msg_len %u * %u; ignoring message"
, (int) len
, (unsigned) buf->msg.sadb_msg_len
, (unsigned) IPSEC_PFKEYv2_ALIGN);
}
else if (!(buf->msg.sadb_msg_pid == (unsigned)pid
|| (buf->msg.sadb_msg_pid == 0 && buf->msg.sadb_msg_type == SADB_ACQUIRE)
|| (buf->msg.sadb_msg_type == SADB_REGISTER)
|| (buf->msg.sadb_msg_pid == 0 && buf->msg.sadb_msg_type == SADB_X_NAT_T_NEW_MAPPING)))
{
/* not for us: ignore */
DBG(DBG_KLIPS,
DBG_log("pfkey_get: ignoring PF_KEY %s message %u for process %u"
, sparse_val_show(pfkey_type_names, buf->msg.sadb_msg_type)
, buf->msg.sadb_msg_seq
, buf->msg.sadb_msg_pid));
}
else
{
DBG(DBG_KLIPS,
DBG_log("pfkey_get: %s message %u"
, sparse_val_show(pfkey_type_names, buf->msg.sadb_msg_type)
, buf->msg.sadb_msg_seq));
return TRUE;
}
}
}
/* get a response to a specific message */
static bool
pfkey_get_response(pfkey_buf *buf, pfkey_seq_t seq)
{
while (pfkey_get(buf))
{
if (buf->msg.sadb_msg_pid == (unsigned)pid
&& buf->msg.sadb_msg_seq == seq)
{
return TRUE;
}
else
{
/* Not for us: queue it. */
size_t bl = buf->msg.sadb_msg_len * IPSEC_PFKEYv2_ALIGN;
pfkey_item *it = alloc_bytes(offsetof(pfkey_item, buf) + bl, "pfkey_item");
memcpy(&it->buf, buf, bl);
it->next = NULL;
if (pfkey_iq_head == NULL)
{
pfkey_iq_head = it;
}
else
{
pfkey_iq_tail->next = it;
}
pfkey_iq_tail = it;
}
}
return FALSE;
}
/* Process a SADB_REGISTER message from the kernel.
* This will be a response to one of ours, but it may be asynchronous
* (if kernel modules are loaded and unloaded).
* Some sanity checking has already been performed.
*/
static void
klips_pfkey_register_response(const struct sadb_msg *msg)
{
/* Find out what the kernel can support.
* In fact, the only question at the moment
* is whether it can support IPcomp.
* So we ignore the rest.
* ??? we really should pay attention to what transforms are supported.
*/
switch (msg->sadb_msg_satype)
{
case SADB_SATYPE_AH:
break;
case SADB_SATYPE_ESP:
#ifndef NO_KERNEL_ALG
kernel_alg_register_pfkey(msg, sizeof (pfkey_buf));
#endif
break;
case SADB_X_SATYPE_COMP:
/* ??? There ought to be an extension to list the
* supported algorithms, but RFC 2367 doesn't
* list one for IPcomp. KLIPS uses SADB_X_CALG_DEFLATE.
* Since we only implement deflate, we'll assume this.
*/
can_do_IPcomp = TRUE;
break;
case SADB_X_SATYPE_IPIP:
break;
default:
break;
}
}
/* Processs a SADB_ACQUIRE message from KLIPS.
* Try to build an opportunistic connection!
* See RFC 2367 "PF_KEY Key Management API, Version 2" 3.1.6
* <base, address(SD), (address(P)), (identity(SD),) (sensitivity,) proposal>
* - extensions for source and data IP addresses
* - optional extensions for identity [not useful for us?]
* - optional extension for sensitivity [not useful for us?]
* - expension for proposal [not useful for us?]
*
* ??? We must use the sequence number in creating an SA.
* We actually need to create up to 4 SAs each way. Which one?
* I guess it depends on the protocol present in the sadb_msg_satype.
* For now, we'll ignore this requirement.
*
* ??? We need some mechanism to make sure that multiple ACQUIRE messages
* don't cause a whole bunch of redundant negotiations.
*/
static void
process_pfkey_acquire(pfkey_buf *buf, struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
struct sadb_address *srcx = (void *) extensions[SADB_EXT_ADDRESS_SRC];
struct sadb_address *dstx = (void *) extensions[SADB_EXT_ADDRESS_DST];
int src_proto = srcx->sadb_address_proto;
int dst_proto = dstx->sadb_address_proto;
ip_address *src = (ip_address*)&srcx[1];
ip_address *dst = (ip_address*)&dstx[1];
ip_subnet ours, his;
err_t ugh = NULL;
/* assumption: we're only catching our own outgoing packets
* so source is our end and destination is the other end.
* Verifying this is not actually convenient.
*
* This stylized control structure yields a complaint or
* desired results. For compactness, a pointer value is
* treated as a boolean. Logically, the structure is:
* keep going as long as things are OK.
*/
if (buf->msg.sadb_msg_pid == 0 /* we only wish to hear from kernel */
&& !(ugh = src_proto == dst_proto? NULL : "src and dst protocols differ")
&& !(ugh = addrtypeof(src) == addrtypeof(dst)? NULL : "conflicting address types")
&& !(ugh = addrtosubnet(src, &ours))
&& !(ugh = addrtosubnet(dst, &his)))
record_and_initiate_opportunistic(&ours, &his, src_proto, "%acquire");
if (ugh != NULL)
plog("SADB_ACQUIRE message from KLIPS malformed: %s", ugh);
}
/* Handle PF_KEY messages from the kernel that are not dealt with
* synchronously. In other words, all but responses to PF_KEY messages
* that we sent.
*/
static void
pfkey_async(pfkey_buf *buf)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
if (pfkey_msg_parse(&buf->msg, NULL, extensions, EXT_BITS_OUT))
{
plog("pfkey_async:"
" unparseable PF_KEY message:"
" %s len=%d, errno=%d, seq=%d, pid=%d; message ignored"
, sparse_val_show(pfkey_type_names, buf->msg.sadb_msg_type)
, buf->msg.sadb_msg_len
, buf->msg.sadb_msg_errno
, buf->msg.sadb_msg_seq
, buf->msg.sadb_msg_pid);
}
else
{
DBG(DBG_CONTROL | DBG_KLIPS, DBG_log("pfkey_async:"
" %s len=%u, errno=%u, satype=%u, seq=%u, pid=%u"
, sparse_val_show(pfkey_type_names, buf->msg.sadb_msg_type)
, buf->msg.sadb_msg_len
, buf->msg.sadb_msg_errno
, buf->msg.sadb_msg_satype
, buf->msg.sadb_msg_seq
, buf->msg.sadb_msg_pid));
switch (buf->msg.sadb_msg_type)
{
case SADB_REGISTER:
kernel_ops->pfkey_register_response(&buf->msg);
break;
case SADB_ACQUIRE:
/* to simulate loss of ACQUIRE, delete this call */
process_pfkey_acquire(buf, extensions);
break;
case SADB_X_NAT_T_NEW_MAPPING:
process_pfkey_nat_t_new_mapping(&(buf->msg), extensions);
break;
default:
/* ignored */
break;
}
}
}
/* asynchronous messages from our queue */
static void
pfkey_dequeue(void)
{
while (pfkey_iq_head != NULL)
{
pfkey_item *it = pfkey_iq_head;
pfkey_async(&it->buf);
pfkey_iq_head = it->next;
pfree(it);
}
/* Handle any orphaned holds, but only if no pfkey input is pending.
* For each, we initiate Opportunistic.
* note: we don't need to advance the pointer because
* record_and_initiate_opportunistic will remove the current
* record each time we call it.
*/
while (orphaned_holds != NULL && !pfkey_input_ready())
record_and_initiate_opportunistic(&orphaned_holds->ours
, &orphaned_holds->his
, orphaned_holds->transport_proto
, "%hold found-pfkey");
}
/* asynchronous messages directly from PF_KEY socket */
static void
pfkey_event(void)
{
pfkey_buf buf;
if (pfkey_get(&buf))
pfkey_async(&buf);
}
static bool
pfkey_build(int error
, const char *description
, const char *text_said
, struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
if (error == 0)
{
return TRUE;
}
else
{
loglog(RC_LOG_SERIOUS, "building of %s %s failed, code %d"
, description, text_said, error);
pfkey_extensions_free(extensions);
return FALSE;
}
}
/* pfkey_extensions_init + pfkey_build + pfkey_msg_hdr_build */
static bool
pfkey_msg_start(u_int8_t msg_type
, u_int8_t satype
, const char *description
, const char *text_said
, struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
pfkey_extensions_init(extensions);
return pfkey_build(pfkey_msg_hdr_build(&extensions[0], msg_type
, satype, 0, ++pfkey_seq, pid)
, description, text_said, extensions);
}
/* pfkey_build + pfkey_address_build */
static bool
pfkeyext_address(u_int16_t exttype
, const ip_address *address
, const char *description
, const char *text_said
, struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
/* the following variable is only needed to silence
* a warning caused by the fact that the argument
* to sockaddrof is NOT pointer to const!
*/
ip_address t = *address;
return pfkey_build(pfkey_address_build(extensions + exttype
, exttype, 0, 0, sockaddrof(&t))
, description, text_said, extensions);
}
/* pfkey_build + pfkey_x_protocol_build */
static bool
pfkeyext_protocol(int transport_proto
, const char *description
, const char *text_said
, struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
return (transport_proto == 0)? TRUE
: pfkey_build(
pfkey_x_protocol_build(extensions + SADB_X_EXT_PROTOCOL, transport_proto)
, description, text_said, extensions);
}
/* Finish (building, sending, accepting response for) PF_KEY message.
* If response isn't NULL, the response from the kernel will be
* placed there (and its errno field will not be examined).
* Returns TRUE iff all appears well.
*/
static bool
finish_pfkey_msg(struct sadb_ext *extensions[SADB_EXT_MAX + 1]
, const char *description
, const char *text_said
, pfkey_buf *response)
{
struct sadb_msg *pfkey_msg;
bool success = TRUE;
int error;
error = pfkey_msg_build(&pfkey_msg, extensions, EXT_BITS_IN);
if (error != 0)
{
loglog(RC_LOG_SERIOUS, "pfkey_msg_build of %s %s failed, code %d"
, description, text_said, error);
success = FALSE;
}
else
{
size_t len = pfkey_msg->sadb_msg_len * IPSEC_PFKEYv2_ALIGN;
DBG(DBG_KLIPS,
DBG_log("finish_pfkey_msg: %s message %u for %s %s"
, sparse_val_show(pfkey_type_names, pfkey_msg->sadb_msg_type)
, pfkey_msg->sadb_msg_seq
, description, text_said);
DBG_dump(NULL, (void *) pfkey_msg, len));
if (!no_klips)
{
ssize_t r = write(pfkeyfd, pfkey_msg, len);
if (r != (ssize_t)len)
{
if (r < 0)
{
log_errno((e
, "pfkey write() of %s message %u"
" for %s %s failed"
, sparse_val_show(pfkey_type_names
, pfkey_msg->sadb_msg_type)
, pfkey_msg->sadb_msg_seq
, description, text_said));
}
else
{
loglog(RC_LOG_SERIOUS
, "ERROR: pfkey write() of %s message %u"
" for %s %s truncated: %ld instead of %ld"
, sparse_val_show(pfkey_type_names
, pfkey_msg->sadb_msg_type)
, pfkey_msg->sadb_msg_seq
, description, text_said
, (long)r, (long)len);
}
success = FALSE;
/* if we were compiled with debugging, but we haven't already
* dumped the KLIPS command, do so.
*/
#ifdef DEBUG
if ((cur_debugging & DBG_KLIPS) == 0)
DBG_dump(NULL, (void *) pfkey_msg, len);
#endif
}
else
{
/* Check response from KLIPS.
* It ought to be an echo, perhaps with additional info.
* If the caller wants it, response will point to space.
*/
pfkey_buf b;
pfkey_buf *bp = response != NULL? response : &b;
if (!pfkey_get_response(bp, ((struct sadb_msg *) extensions[0])->sadb_msg_seq))
{
loglog(RC_LOG_SERIOUS
, "ERROR: no response to our PF_KEY %s message for %s %s"
, sparse_val_show(pfkey_type_names, pfkey_msg->sadb_msg_type)
, description, text_said);
success = FALSE;
}
else if (pfkey_msg->sadb_msg_type != bp->msg.sadb_msg_type)
{
loglog(RC_LOG_SERIOUS
, "FreeS/WAN ERROR: response to our PF_KEY %s message for %s %s was of wrong type (%s)"
, sparse_name(pfkey_type_names, pfkey_msg->sadb_msg_type)
, description, text_said
, sparse_val_show(pfkey_type_names, bp->msg.sadb_msg_type));
success = FALSE;
}
else if (response == NULL && bp->msg.sadb_msg_errno != 0)
{
/* KLIPS is signalling a problem */
loglog(RC_LOG_SERIOUS
, "ERROR: PF_KEY %s response for %s %s included errno %u: %s"
, sparse_val_show(pfkey_type_names, pfkey_msg->sadb_msg_type)
, description, text_said
, (unsigned) bp->msg.sadb_msg_errno
, strerror(bp->msg.sadb_msg_errno));
success = FALSE;
}
}
}
}
/* all paths must exit this way to free resources */
pfkey_extensions_free(extensions);
pfkey_msg_free(&pfkey_msg);
return success;
}
/* register SA types that can be negotiated */
void
pfkey_register_proto(unsigned satype, const char *satypename)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
pfkey_buf pfb;
if (!(pfkey_msg_start(SADB_REGISTER
, satype
, satypename, NULL, extensions)
&& finish_pfkey_msg(extensions, satypename, "", &pfb)))
{
/* ??? should this be loglog */
plog("no KLIPS support for %s", satypename);
}
else
{
kernel_ops->pfkey_register_response(&pfb.msg);
DBG(DBG_KLIPS,
DBG_log("%s registered with kernel.", satypename));
}
}
static void
klips_pfkey_register(void)
{
pfkey_register_proto(SADB_SATYPE_AH, "AH");
pfkey_register_proto(SADB_SATYPE_ESP, "ESP");
can_do_IPcomp = FALSE; /* until we get a response from KLIPS */
pfkey_register_proto(SADB_X_SATYPE_COMP, "IPCOMP");
pfkey_register_proto(SADB_X_SATYPE_IPIP, "IPIP");
}
static bool
pfkey_raw_eroute(const ip_address *this_host
, const ip_subnet *this_client
, const ip_address *that_host
, const ip_subnet *that_client
, ipsec_spi_t spi
, unsigned int satype
, unsigned int transport_proto
, const struct pfkey_proto_info *proto_info UNUSED
, time_t use_lifetime UNUSED
, unsigned int op
, const char *text_said)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
ip_address
sflow_ska,
dflow_ska,
smask_ska,
dmask_ska;
int sport = ntohs(portof(&this_client->addr));
int dport = ntohs(portof(&that_client->addr));
networkof(this_client, &sflow_ska);
maskof(this_client, &smask_ska);
setportof(sport ? ~0:0, &smask_ska);
networkof(that_client, &dflow_ska);
maskof(that_client, &dmask_ska);
setportof(dport ? ~0:0, &dmask_ska);
if (!pfkey_msg_start(op & ERO_MASK, satype
, "pfkey_msg_hdr flow", text_said, extensions))
{
return FALSE;
}
if (op != ERO_DELETE)
{
if (!(pfkey_build(pfkey_sa_build(&extensions[SADB_EXT_SA]
, SADB_EXT_SA
, spi /* in network order */
, 0, 0, 0, 0, op >> ERO_FLAG_SHIFT)
, "pfkey_sa add flow", text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_SRC, this_host
, "pfkey_addr_s add flow", text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_DST, that_host
, "pfkey_addr_d add flow", text_said
, extensions)))
{
return FALSE;
}
}
if (!pfkeyext_address(SADB_X_EXT_ADDRESS_SRC_FLOW, &sflow_ska
, "pfkey_addr_sflow", text_said, extensions))
{
return FALSE;
}
if (!pfkeyext_address(SADB_X_EXT_ADDRESS_DST_FLOW, &dflow_ska
, "pfkey_addr_dflow", text_said, extensions))
{
return FALSE;
}
if (!pfkeyext_address(SADB_X_EXT_ADDRESS_SRC_MASK, &smask_ska
, "pfkey_addr_smask", text_said, extensions))
{
return FALSE;
}
if (!pfkeyext_address(SADB_X_EXT_ADDRESS_DST_MASK, &dmask_ska
, "pfkey_addr_dmask", text_said, extensions))
{
return FALSE;
}
if (!pfkeyext_protocol(transport_proto
, "pfkey_x_protocol", text_said, extensions))
{
return FALSE;
}
return finish_pfkey_msg(extensions, "flow", text_said, NULL);
}
static bool
pfkey_add_sa(const struct kernel_sa *sa, bool replace)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
return pfkey_msg_start(replace ? SADB_UPDATE : SADB_ADD, sa->satype
, "pfkey_msg_hdr Add SA", sa->text_said, extensions)
&& pfkey_build(pfkey_sa_build(&extensions[SADB_EXT_SA]
, SADB_EXT_SA
, sa->spi /* in network order */
, sa->replay_window, SADB_SASTATE_MATURE
, sa->authalg, sa->encalg ? sa->encalg: sa->compalg, 0)
, "pfkey_sa Add SA", sa->text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_SRC, sa->src
, "pfkey_addr_s Add SA", sa->text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_DST, sa->dst
, "pfkey_addr_d Add SA", sa->text_said, extensions)
&& (sa->authkeylen == 0
|| pfkey_build(pfkey_key_build(&extensions[SADB_EXT_KEY_AUTH]
, SADB_EXT_KEY_AUTH, sa->authkeylen * BITS_PER_BYTE
, sa->authkey)
, "pfkey_key_a Add SA", sa->text_said, extensions))
&& (sa->enckeylen == 0
|| pfkey_build(pfkey_key_build(&extensions[SADB_EXT_KEY_ENCRYPT]
, SADB_EXT_KEY_ENCRYPT, sa->enckeylen * BITS_PER_BYTE
, sa->enckey)
, "pfkey_key_e Add SA", sa->text_said, extensions))
&& (sa->natt_type == 0
|| pfkey_build(pfkey_x_nat_t_type_build(
&extensions[SADB_X_EXT_NAT_T_TYPE], sa->natt_type),
"pfkey_nat_t_type Add ESP SA", sa->text_said, extensions))
&& (sa->natt_sport == 0
|| pfkey_build(pfkey_x_nat_t_port_build(
&extensions[SADB_X_EXT_NAT_T_SPORT], SADB_X_EXT_NAT_T_SPORT,
sa->natt_sport), "pfkey_nat_t_sport Add ESP SA", sa->text_said,
extensions))
&& (sa->natt_dport == 0
|| pfkey_build(pfkey_x_nat_t_port_build(
&extensions[SADB_X_EXT_NAT_T_DPORT], SADB_X_EXT_NAT_T_DPORT,
sa->natt_dport), "pfkey_nat_t_dport Add ESP SA", sa->text_said,
extensions))
&& (sa->natt_type == 0 || isanyaddr(sa->natt_oa)
|| pfkeyext_address(SADB_X_EXT_NAT_T_OA, sa->natt_oa
, "pfkey_nat_t_oa Add ESP SA", sa->text_said, extensions))
&& finish_pfkey_msg(extensions, "Add SA", sa->text_said, NULL);
}
static bool
pfkey_grp_sa(const struct kernel_sa *sa0, const struct kernel_sa *sa1)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
return pfkey_msg_start(SADB_X_GRPSA, sa1->satype
, "pfkey_msg_hdr group", sa1->text_said, extensions)
&& pfkey_build(pfkey_sa_build(&extensions[SADB_EXT_SA]
, SADB_EXT_SA
, sa1->spi /* in network order */
, 0, 0, 0, 0, 0)
, "pfkey_sa group", sa1->text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_DST, sa1->dst
, "pfkey_addr_d group", sa1->text_said, extensions)
&& pfkey_build(pfkey_x_satype_build(&extensions[SADB_X_EXT_SATYPE2]
, sa0->satype)
, "pfkey_satype group", sa0->text_said, extensions)
&& pfkey_build(pfkey_sa_build(&extensions[SADB_X_EXT_SA2]
, SADB_X_EXT_SA2
, sa0->spi /* in network order */
, 0, 0, 0, 0, 0)
, "pfkey_sa2 group", sa0->text_said, extensions)
&& pfkeyext_address(SADB_X_EXT_ADDRESS_DST2, sa0->dst
, "pfkey_addr_d2 group", sa0->text_said, extensions)
&& finish_pfkey_msg(extensions, "group", sa1->text_said, NULL);
}
static bool
pfkey_del_sa(const struct kernel_sa *sa)
{
struct sadb_ext *extensions[SADB_EXT_MAX + 1];
return pfkey_msg_start(SADB_DELETE, proto2satype(sa->proto)
, "pfkey_msg_hdr delete SA", sa->text_said, extensions)
&& pfkey_build(pfkey_sa_build(&extensions[SADB_EXT_SA]
, SADB_EXT_SA
, sa->spi /* in host order */
, 0, SADB_SASTATE_MATURE, 0, 0, 0)
, "pfkey_sa delete SA", sa->text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_SRC, sa->src
, "pfkey_addr_s delete SA", sa->text_said, extensions)
&& pfkeyext_address(SADB_EXT_ADDRESS_DST, sa->dst
, "pfkey_addr_d delete SA", sa->text_said, extensions)
&& finish_pfkey_msg(extensions, "Delete SA", sa->text_said, NULL);
}
void
pfkey_close(void)
{
while (pfkey_iq_head != NULL)
{
pfkey_item *it = pfkey_iq_head;
pfkey_iq_head = it->next;
pfree(it);
}
close(pfkeyfd);
pfkeyfd = NULL_FD;
}
const struct kernel_ops klips_kernel_ops = {
type: KERNEL_TYPE_KLIPS,
async_fdp: &pfkeyfd,
pfkey_register: klips_pfkey_register,
pfkey_register_response: klips_pfkey_register_response,
process_queue: pfkey_dequeue,
process_msg: pfkey_event,
raw_eroute: pfkey_raw_eroute,
add_sa: pfkey_add_sa,
grp_sa: pfkey_grp_sa,
del_sa: pfkey_del_sa,
get_sa: NULL,
get_spi: NULL,
inbound_eroute: FALSE,
policy_lifetime: FALSE,
init: NULL
};
#endif /* KLIPS */