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/* $NetBSD: parse.y,v 1.4 2000/02/06 11:21:47 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
* 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 project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
*/
/* KAME Id: parse.y,v 1.14 1999/12/30 15:13:27 sakane Exp */
%{
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/route.h>
#include <netinet/in.h>
#include <net/pfkeyv2.h>
#include <netkey/key_var.h>
#include <netinet6/ipsec.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include "vchar.h"
#define ATOX(c) \
(isdigit(c) ? (c - '0') : (isupper(c) ? (c - 'A' + 10) : (c - 'a' + 10) ))
u_int p_type;
u_int32_t p_spi;
struct sockaddr *p_src, *p_dst;
u_int p_prefs, p_prefd, p_upper;
u_int p_satype, p_ext, p_alg_enc, p_alg_auth, p_replay, p_mode;
u_int32_t p_reqid;
u_int p_key_enc_len, p_key_auth_len;
caddr_t p_key_enc, p_key_auth;
time_t p_lt_hard, p_lt_soft;
u_int p_policy_len;
char *p_policy;
/* temporary buffer */
static struct sockaddr *pp_addr;
static u_int pp_prefix;
static u_int pp_port;
static caddr_t pp_key;
extern u_char m_buf[BUFSIZ];
extern int m_len;
extern char cmdarg[8192];
extern int f_debug;
int setkeymsg __P((void));
static int setvarbuf __P((int *, struct sadb_ext *, int, caddr_t, int));
void parse_init __P((void));
void free_buffer __P((void));
extern int setkeymsg __P((void));
extern int sendkeymsg __P((void));
extern int yylex __P((void));
extern void yyerror __P((char *));
%}
%union {
unsigned long num;
vchar_t val;
}
%token EOT
%token ADD GET DELETE FLUSH DUMP
%token IP4_ADDRESS IP6_ADDRESS PREFIX PORT PORTANY
%token UP_PROTO PR_ESP PR_AH PR_IPCOMP
%token F_PROTOCOL F_AUTH F_ENC F_REPLAY F_COMP F_RAWCPI
%token F_MODE MODE F_REQID
%token F_EXT EXTENSION NOCYCLICSEQ
%token ALG_AUTH ALG_ENC ALG_ENC_DESDERIV ALG_ENC_DES32IV ALG_COMP
%token F_LIFETIME_HARD F_LIFETIME_SOFT
%token DECSTRING QUOTEDSTRING HEXSTRING ANY
/* SPD management */
%token SPDADD SPDDELETE SPDDUMP SPDFLUSH
%token F_POLICY PL_REQUESTS
%type <num> PORT PREFIX EXTENSION MODE
%type <num> UP_PROTO PR_ESP PR_AH PR_IPCOMP
%type <num> ALG_AUTH ALG_ENC ALG_ENC_DESDERIV ALG_ENC_DES32IV ALG_COMP
%type <num> DECSTRING
%type <val> IP4_ADDRESS IP6_ADDRESS PL_REQUESTS
%type <val> key_string policy_requests
%type <val> QUOTEDSTRING HEXSTRING
%%
commands
: /*NOTHING*/
| commands command
{
if (f_debug) {
printf("cmdarg:\n%s\n", cmdarg);
} else {
setkeymsg();
sendkeymsg();
}
free_buffer();
parse_init();
}
;
command
: add_command
| get_command
| delete_command
| flush_command
| dump_command
| spdadd_command
| spddelete_command
| spddump_command
| spdflush_command
;
/* commands concerned with management, there is in tail of this file. */
/* add command */
add_command
: ADD { p_type = SADB_ADD; }
sa_selector_spec extension_spec algorithm_spec EOT
;
/* delete */
delete_command
: DELETE { p_type = SADB_DELETE; }
sa_selector_spec extension_spec EOT
;
/* get command */
get_command
: GET { p_type = SADB_GET; }
sa_selector_spec extension_spec EOT
;
/* flush */
flush_command
: FLUSH { p_type = SADB_FLUSH; }
protocol_spec EOT
;
/* dump */
dump_command
: DUMP { p_type = SADB_DUMP; }
protocol_spec EOT
;
/* sa_selector_spec */
sa_selector_spec
: ipaddress { p_src = pp_addr; }
ipaddress { p_dst = pp_addr; }
protocol_spec spi
;
protocol_spec
: /*NOTHING*/ { p_satype = SADB_SATYPE_UNSPEC; }
| PR_ESP
{
p_satype = SADB_SATYPE_ESP;
if ($1 == 1)
p_ext |= SADB_X_EXT_OLD;
else
p_ext &= ~SADB_X_EXT_OLD;
}
| PR_AH
{
p_satype = SADB_SATYPE_AH;
if ($1 == 1)
p_ext |= SADB_X_EXT_OLD;
else
p_ext &= ~SADB_X_EXT_OLD;
}
| PR_IPCOMP
{
p_satype = SADB_X_SATYPE_IPCOMP;
}
;
spi
: DECSTRING { p_spi = $1; }
| HEXSTRING
{
caddr_t bp;
caddr_t yp = $1.buf;
char buf0[4], buf[4];
int i, j;
/* sanity check */
if ($1.len > 4) {
yyerror("SPI too big.");
free($1.buf);
return -1;
}
bp = buf0;
while (*yp) {
*bp = (ATOX(yp[0]) << 4) | ATOX(yp[1]);
yp += 2, bp++;
}
/* initialize */
for (i = 0; i < 4; i++) buf[i] = 0;
for (j = $1.len - 1, i = 3; j >= 0; j--, i--)
buf[i] = buf0[j];
/* XXX: endian */
p_spi = ntohl(*(u_int32_t *)buf);
free($1.buf);
}
;
algorithm_spec
: esp_spec
| ah_spec
| ipcomp_spec
;
esp_spec
: F_ENC enc_alg enc_key F_AUTH auth_alg auth_key
| F_ENC enc_alg enc_key
;
ah_spec
: F_AUTH auth_alg auth_key
;
ipcomp_spec
: F_COMP ALG_COMP { p_alg_enc = $2; }
| F_COMP ALG_COMP { p_alg_enc = $2; }
F_RAWCPI { p_ext |= SADB_X_EXT_RAWCPI; }
;
enc_alg
: ALG_ENC { p_alg_enc = $1; }
| ALG_ENC_DESDERIV
{
p_alg_enc = $1;
if (p_ext & SADB_X_EXT_OLD) {
yyerror("algorithm mismatched.");
return -1;
}
p_ext |= SADB_X_EXT_DERIV;
}
| ALG_ENC_DES32IV
{
p_alg_enc = $1;
if (!(p_ext & SADB_X_EXT_OLD)) {
yyerror("algorithm mismatched.");
return -1;
}
p_ext |= SADB_X_EXT_IV4B;
}
;
enc_key
: /*NOTHING*/
{
if (p_alg_enc != SADB_EALG_NULL) {
yyerror("no key found.");
return -1;
}
}
| key_string
{
p_key_enc_len = $1.len;
p_key_enc = pp_key;
if (ipsec_check_keylen(SADB_EXT_SUPPORTED_ENCRYPT,
p_alg_enc,
PFKEY_UNUNIT64(p_key_enc_len)) < 0) {
yyerror(ipsec_strerror());
return -1;
}
}
;
auth_alg
: ALG_AUTH { p_alg_auth = $1; }
;
auth_key
: /*NOTHING*/
{
if (p_alg_auth != SADB_AALG_NULL) {
yyerror("no key found.");
return -1;
}
}
| key_string
{
p_key_auth_len = $1.len;
p_key_auth = pp_key;
if (ipsec_check_keylen(SADB_EXT_SUPPORTED_AUTH,
p_alg_auth,
PFKEY_UNUNIT64(p_key_auth_len)) < 0) {
yyerror(ipsec_strerror());
return -1;
}
}
;
key_string
: QUOTEDSTRING
{
pp_key = $1.buf;
/* free pp_key later */
}
| HEXSTRING
{
caddr_t bp;
caddr_t yp = $1.buf;
if ((pp_key = malloc($1.len)) == 0) {
free($1.buf);
yyerror(strerror(errno));
return -1;
}
memset(pp_key, 0, $1.len);
bp = pp_key;
while (*yp) {
*bp = (ATOX(yp[0]) << 4) | ATOX(yp[1]);
yp += 2, bp++;
}
free($1.buf);
}
;
extension_spec
: /*NOTHING*/
| extension_spec extension
;
extension
: F_EXT EXTENSION { p_ext |= $2; }
| F_EXT NOCYCLICSEQ { p_ext ^= SADB_X_EXT_CYCSEQ; }
| F_MODE MODE { p_mode = $2; }
| F_MODE ANY { p_mode = IPSEC_MODE_ANY; }
| F_REQID DECSTRING { p_reqid = $2; }
| F_REPLAY DECSTRING
{
if (p_ext & SADB_X_EXT_OLD) {
yyerror("replay prevention "
"only use on new spec.");
return -1;
}
p_replay = $2;
}
| F_LIFETIME_HARD DECSTRING { p_lt_hard = $2; }
| F_LIFETIME_SOFT DECSTRING { p_lt_soft = $2; }
;
/* definition about command for SPD management */
/* spdadd */
spdadd_command
: SPDADD
{
p_type = SADB_X_SPDADD;
p_satype = SADB_SATYPE_UNSPEC;
}
sp_selector_spec policy_spec EOT
;
spddelete_command:
SPDDELETE
{
p_type = SADB_X_SPDDELETE;
p_satype = SADB_SATYPE_UNSPEC;
}
sp_selector_spec EOT
;
spddump_command:
SPDDUMP
{
p_type = SADB_X_SPDDUMP;
p_satype = SADB_SATYPE_UNSPEC;
}
EOT
;
spdflush_command:
SPDFLUSH
{
p_type = SADB_X_SPDFLUSH;
p_satype = SADB_SATYPE_UNSPEC;
}
EOT
;
/* sp_selector_spec */
sp_selector_spec
: ipaddress { p_src = pp_addr; }
prefix { p_prefs = pp_prefix; }
port { _INPORTBYSA(p_src) = htons(pp_port); }
ipaddress { p_dst = pp_addr; }
prefix { p_prefd = pp_prefix; }
port { _INPORTBYSA(p_dst) = htons(pp_port); }
upper_spec
{
switch (p_upper) {
case IPPROTO_ICMP:
case IPPROTO_ICMPV6:
if (_INPORTBYSA(p_src) != IPSEC_PORT_ANY
|| _INPORTBYSA(p_dst) != IPSEC_PORT_ANY) {
yyerror("port number must be \"any\".");
return -1;
}
break;
default:
break;
}
}
;
ipaddress
: IP4_ADDRESS
{
struct sockaddr_in *in;
u_int sa_len = $1.len;
if ((in = (struct sockaddr_in *)malloc(sa_len)) == 0) {
yyerror(strerror(errno));
free($1.buf);
return -1;
}
memset((caddr_t)in, 0, sa_len);
in->sin_family = PF_INET;
in->sin_len = sa_len;
in->sin_port = IPSEC_PORT_ANY;
(void)inet_pton(PF_INET, $1.buf, &in->sin_addr);
pp_addr = (struct sockaddr *)in;
free($1.buf);
}
| IP6_ADDRESS
{
#ifdef INET6
struct sockaddr_in6 *in6;
u_int sa_len = $1.len;
if ((in6 = (struct sockaddr_in6 *)malloc(sa_len)) == 0) {
free($1.buf);
yyerror(strerror(errno));
return -1;
}
memset((caddr_t)in6, 0, sa_len);
in6->sin6_family = PF_INET6;
in6->sin6_len = sa_len;
in6->sin6_port = IPSEC_PORT_ANY;
(void)inet_pton(PF_INET6, $1.buf,
&in6->sin6_addr);
pp_addr = (struct sockaddr *)in6;
#else
yyerror("IPv6 address not supported");
#endif
free($1.buf);
}
;
prefix
: /*NOTHING*/ { pp_prefix = ~0; }
| PREFIX { pp_prefix = $1; }
;
port
: /*NOTHING*/ { pp_port = IPSEC_PORT_ANY; }
| PORT { pp_port = $1; }
| PORTANY { pp_port = IPSEC_PORT_ANY; }
;
upper_spec
: DECSTRING { p_upper = $1; }
| UP_PROTO { p_upper = $1; }
| PR_ESP { p_upper = IPPROTO_ESP; };
| PR_AH { p_upper = IPPROTO_AH; };
| PR_IPCOMP { p_upper = IPPROTO_IPCOMP; };
| ANY { p_upper = IPSEC_ULPROTO_ANY; }
;
policy_spec
: F_POLICY policy_requests
{
p_policy = ipsec_set_policy($2.buf, $2.len);
if (p_policy == NULL) {
free($2.buf);
p_policy = NULL;
yyerror(ipsec_strerror());
return -1;
}
p_policy_len = ipsec_get_policylen(p_policy);
free($2.buf);
}
;
policy_requests
: PL_REQUESTS { $$ = $1; }
;
%%
int
setkeymsg()
{
struct sadb_msg m_msg;
m_msg.sadb_msg_version = PF_KEY_V2;
m_msg.sadb_msg_type = p_type;
m_msg.sadb_msg_errno = 0;
m_msg.sadb_msg_satype = p_satype;
m_msg.sadb_msg_mode = p_mode;
m_msg.sadb_msg_reserved1 = 0;
m_msg.sadb_msg_seq = 0;
m_msg.sadb_msg_pid = getpid();
m_msg.sadb_msg_reqid = p_reqid;
m_msg.sadb_msg_reserved2 = 0;
m_len = sizeof(struct sadb_msg);
memcpy(m_buf, &m_msg, m_len);
switch (p_type) {
case SADB_FLUSH:
case SADB_DUMP:
break;
case SADB_ADD:
/* set encryption algorithm, if present. */
if (p_satype != SADB_X_SATYPE_IPCOMP && p_alg_enc != SADB_EALG_NONE) {
struct sadb_key m_key;
m_key.sadb_key_len =
PFKEY_UNIT64(sizeof(m_key)
+ PFKEY_ALIGN8(p_key_enc_len));
m_key.sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;
m_key.sadb_key_bits = p_key_enc_len * 8;
m_key.sadb_key_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_key, sizeof(m_key),
(caddr_t)p_key_enc, p_key_enc_len);
}
/* set authentication algorithm, if present. */
if (p_alg_auth != SADB_AALG_NONE) {
struct sadb_key m_key;
m_key.sadb_key_len =
PFKEY_UNIT64(sizeof(m_key)
+ PFKEY_ALIGN8(p_key_auth_len));
m_key.sadb_key_exttype = SADB_EXT_KEY_AUTH;
m_key.sadb_key_bits = p_key_auth_len * 8;
m_key.sadb_key_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_key, sizeof(m_key),
(caddr_t)p_key_auth, p_key_auth_len);
}
/* set lifetime for HARD */
if (p_lt_hard != 0) {
struct sadb_lifetime m_lt;
u_int len = sizeof(struct sadb_lifetime);
m_lt.sadb_lifetime_len = PFKEY_UNIT64(len);
m_lt.sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
m_lt.sadb_lifetime_allocations = 0;
m_lt.sadb_lifetime_bytes = 0;
m_lt.sadb_lifetime_addtime = p_lt_hard;
m_lt.sadb_lifetime_usetime = 0;
memcpy(m_buf + m_len, &m_lt, len);
m_len += len;
}
/* set lifetime for SOFT */
if (p_lt_soft != 0) {
struct sadb_lifetime m_lt;
u_int len = sizeof(struct sadb_lifetime);
m_lt.sadb_lifetime_len = PFKEY_UNIT64(len);
m_lt.sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
m_lt.sadb_lifetime_allocations = 0;
m_lt.sadb_lifetime_bytes = 0;
m_lt.sadb_lifetime_addtime = p_lt_soft;
m_lt.sadb_lifetime_usetime = 0;
memcpy(m_buf + m_len, &m_lt, len);
m_len += len;
}
/* FALLTHROUGH */
case SADB_DELETE:
case SADB_GET:
{
struct sadb_sa m_sa;
struct sadb_address m_addr;
u_int len;
len = sizeof(struct sadb_sa);
m_sa.sadb_sa_len = PFKEY_UNIT64(len);
m_sa.sadb_sa_exttype = SADB_EXT_SA;
m_sa.sadb_sa_spi = htonl(p_spi);
m_sa.sadb_sa_replay = p_replay;
m_sa.sadb_sa_state = 0;
m_sa.sadb_sa_auth = p_alg_auth;
m_sa.sadb_sa_encrypt = p_alg_enc;
m_sa.sadb_sa_flags = p_ext;
memcpy(m_buf + m_len, &m_sa, len);
m_len += len;
/* set src */
m_addr.sadb_address_len =
PFKEY_UNIT64(sizeof(m_addr)
+ PFKEY_ALIGN8(p_src->sa_len));
m_addr.sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
m_addr.sadb_address_proto = IPSEC_ULPROTO_ANY;
m_addr.sadb_address_prefixlen =
_INALENBYAF(p_src->sa_family) << 3;
m_addr.sadb_address_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_addr, sizeof(m_addr),
(caddr_t)p_src, p_src->sa_len);
/* set dst */
m_addr.sadb_address_len =
PFKEY_UNIT64(sizeof(m_addr)
+ PFKEY_ALIGN8(p_dst->sa_len));
m_addr.sadb_address_exttype = SADB_EXT_ADDRESS_DST;
m_addr.sadb_address_proto = IPSEC_ULPROTO_ANY;
m_addr.sadb_address_prefixlen =
_INALENBYAF(p_dst->sa_family) << 3;
m_addr.sadb_address_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_addr, sizeof(m_addr),
(caddr_t)p_dst, p_dst->sa_len);
}
break;
/* for SPD management */
case SADB_X_SPDFLUSH:
case SADB_X_SPDDUMP:
break;
case SADB_X_SPDADD:
{
memcpy(m_buf + m_len, p_policy, p_policy_len);
m_len += p_policy_len;
free(p_policy);
p_policy = NULL;
}
/* FALLTHROUGH */
case SADB_X_SPDDELETE:
{
struct sadb_address m_addr;
/* set src */
m_addr.sadb_address_len =
PFKEY_UNIT64(sizeof(m_addr)
+ PFKEY_ALIGN8(p_src->sa_len));
m_addr.sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
m_addr.sadb_address_proto = p_upper;
m_addr.sadb_address_prefixlen =
(p_prefs != ~0 ? p_prefs :
_INALENBYAF(p_src->sa_family) << 3);
m_addr.sadb_address_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_addr, sizeof(m_addr),
(caddr_t)p_src, p_src->sa_len);
/* set dst */
m_addr.sadb_address_len =
PFKEY_UNIT64(sizeof(m_addr)
+ PFKEY_ALIGN8(p_dst->sa_len));
m_addr.sadb_address_exttype = SADB_EXT_ADDRESS_DST;
m_addr.sadb_address_proto = p_upper;
m_addr.sadb_address_prefixlen =
(p_prefd != ~0 ? p_prefd :
_INALENBYAF(p_dst->sa_family) << 3);
m_addr.sadb_address_reserved = 0;
setvarbuf(&m_len,
(struct sadb_ext *)&m_addr, sizeof(m_addr),
(caddr_t)p_dst, p_dst->sa_len);
}
break;
}
((struct sadb_msg *)m_buf)->sadb_msg_len = PFKEY_UNIT64(m_len);
return 0;
}
static int
setvarbuf(off, ebuf, elen, vbuf, vlen)
caddr_t vbuf;
struct sadb_ext *ebuf;
int *off, elen, vlen;
{
memset(m_buf + *off, 0, PFKEY_UNUNIT64(ebuf->sadb_ext_len));
memcpy(m_buf + *off, (caddr_t)ebuf, elen);
memcpy(m_buf + *off + elen, vbuf, vlen);
(*off) += PFKEY_ALIGN8(elen + vlen);
return 0;
}
void
parse_init()
{
p_type = 0;
p_spi = 0;
p_src = 0, p_dst = 0;
pp_prefix = p_prefs = p_prefd = ~0;
pp_port = IPSEC_PORT_ANY;
p_upper = 0;
p_satype = 0;
p_ext = SADB_X_EXT_CYCSEQ;
p_alg_enc = SADB_EALG_NONE;
p_alg_auth = SADB_AALG_NONE;
p_mode = IPSEC_MODE_ANY;
p_reqid = 0;
p_replay = 4;
p_key_enc_len = p_key_auth_len = 0;
p_key_enc = p_key_auth = 0;
p_lt_hard = p_lt_soft = 0;
p_policy_len = 0;
p_policy = NULL;
memset(cmdarg, 0, sizeof(cmdarg));
return;
}
void
free_buffer()
{
if (p_src) free(p_src);
if (p_dst) free(p_dst);
if (p_key_enc) free(p_key_enc);
if (p_key_auth) free(p_key_auth);
return;
}
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