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parse.y
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/* $OpenBSD: parse.y,v 1.53 2002/01/09 18:00:57 mpech Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR 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 <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp6.h>
#include <net/pfvar.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <err.h>
#include "pfctl_parser.h"
static struct pfctl *pf = NULL;
static FILE *fin = NULL;
static int debug = 0;
static int lineno = 1;
static int errors = 0;
static int natmode = 0;
struct node_if {
char ifname[IFNAMSIZ];
u_int8_t not;
struct node_if *next;
};
struct node_proto {
u_int8_t proto;
struct node_proto *next;
};
struct node_host {
struct pf_addr addr;
struct pf_addr mask;
u_int8_t af;
u_int8_t not;
struct node_host *next;
};
struct node_port {
u_int16_t port[2];
u_int8_t op;
struct node_port *next;
};
struct node_icmp {
u_int8_t code;
u_int8_t type;
u_int8_t proto;
struct node_icmp *next;
};
struct peer {
struct node_host *host;
struct node_port *port;
};
int rule_consistent(struct pf_rule *);
int yyparse(void);
struct pf_rule_addr *new_addr(void);
void ipmask(struct pf_addr *, u_int8_t);
void expand_rule_hosts(struct pf_rule *,
struct node_if *, struct node_proto *,
struct node_host *, struct node_port *,
struct node_host *, struct node_port *,
struct node_icmp *);
void expand_rule_protos(struct pf_rule *,
struct node_if *, struct node_proto *,
struct node_host *, struct node_port *,
struct node_host *, struct node_port *,
struct node_icmp *);
void expand_rule(struct pf_rule *,
struct node_if *, struct node_proto *,
struct node_host *, struct node_port *,
struct node_host *, struct node_port *,
struct node_icmp *);
struct sym {
struct sym *next;
char *nam;
char *val;
};
struct sym *symhead = NULL;
int symset(char *name, char *val);
char * symget(char *name);
struct ifaddrs *ifa0_lookup(char *ifa_name);
struct ifaddrs *ifa4_lookup(char *ifa_name);
struct ifaddrs *ifa6_lookup(char *ifa_name);
typedef struct {
union {
u_int32_t number;
int i;
char *string;
struct {
u_int8_t b1;
u_int8_t b2;
u_int16_t w;
} b;
struct range {
int a;
int b;
int t;
} range;
struct node_if *interface;
struct node_proto *proto;
struct node_icmp *icmp;
struct node_host *host;
struct node_port *port;
struct peer peer;
struct {
struct peer src, dst;
} fromto;
struct {
char *string;
struct pf_addr *addr;
u_int8_t rt;
u_int8_t af;
} route;
struct redirection {
struct node_host *address;
struct range rport;
} *redirection;
} v;
int lineno;
} YYSTYPE;
%}
%token PASS BLOCK SCRUB RETURN IN OUT LOG LOGALL QUICK ON FROM TO FLAGS
%token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
%token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
%token MINTTL IPV6ADDR ERROR ALLOWOPTS FASTROUTE ROUTETO DUPTO NO LABEL
%token <v.string> STRING
%token <v.number> NUMBER
%token <v.i> PORTUNARY PORTBINARY
%type <v.interface> interface if_list if_item_not if_item
%type <v.number> port icmptype icmp6type minttl
%type <v.i> no dir log quick af keep nodf allowopts
%type <v.b> action flag flags blockspec
%type <v.range> dport rport
%type <v.proto> proto proto_list proto_item
%type <v.icmp> icmpspec icmp_list icmp6_list icmp_item icmp6_item
%type <v.fromto> fromto
%type <v.peer> ipportspec
%type <v.host> ipspec xhost host address host_list IPV6ADDR
%type <v.port> portspec port_list port_item
%type <v.route> route
%type <v.redirection> redirection
%type <v.string> label
%%
ruleset : /* empty */
| ruleset '\n'
| ruleset pfrule '\n'
| ruleset natrule '\n'
| ruleset binatrule '\n'
| ruleset rdrrule '\n'
| ruleset varset '\n'
| ruleset error '\n' { errors++; }
;
varset : STRING PORTUNARY STRING
{
if (pf->opts & PF_OPT_VERBOSE)
printf("%s = %s\n", $1, $3);
if (symset($1, $3) == -1) {
yyerror("cannot store variable %s", $1);
YYERROR;
}
}
;
pfrule : action dir log quick interface route af proto fromto flags icmpspec keep nodf minttl allowopts label
{
struct pf_rule r;
if (natmode) {
yyerror("filter rule not permitted in nat mode");
YYERROR;
}
memset(&r, 0, sizeof(r));
r.action = $1.b1;
if ($1.b2)
r.rule_flag |= PFRULE_RETURNRST;
else
r.return_icmp = $1.w;
r.direction = $2;
r.log = $3;
r.quick = $4;
r.af = $7;
r.flags = $10.b1;
r.flagset = $10.b2;
r.keep_state = $12;
if ($13)
r.rule_flag |= PFRULE_NODF;
if ($14)
r.min_ttl = $14;
r.allow_opts = $15;
if ($6.rt) {
r.rt = $6.rt;
if ($6.string) {
memcpy(r.rt_ifname, $6.string,
sizeof(r.rt_ifname));
free($6.string);
}
if ($6.addr) {
if (!r.af)
r.af = $6.af;
else if (r.af != $6.af) {
yyerror("address family"
" mismatch");
YYERROR;
}
memcpy(&r.rt_addr, $6.addr,
sizeof(r.rt_addr));
free($6.addr);
}
}
if ($16) {
if (strlen($16) >= PF_RULE_LABEL_SIZE) {
yyerror("rule label too long (max "
"%d chars)", PF_RULE_LABEL_SIZE-1);
YYERROR;
}
strcpy(r.label, $16);
free($16);
}
expand_rule(&r, $5, $8, $9.src.host, $9.src.port,
$9.dst.host, $9.dst.port, $11);
}
;
action : PASS { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
| BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; }
| SCRUB { $$.b1 = PF_SCRUB; $$.b2 = $$.w = 0; }
;
blockspec : /* empty */ { $$.b2 = 0; $$.w = 0; }
| RETURNRST { $$.b2 = 1; $$.w = 0;}
| RETURNICMP {
$$.b2 = 0;
$$.w = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
}
| RETURNICMP6 {
$$.b2 = 0;
$$.w = (ICMP6_DST_UNREACH << 8) |
ICMP6_DST_UNREACH_NOPORT;
}
| RETURNICMP '(' NUMBER ')' {
$$.w = (ICMP_UNREACH << 8) | $3;
$$.b2 = 0;
}
| RETURNICMP '(' STRING ')' {
struct icmpcodeent *p;
if ((p = geticmpcodebyname(ICMP_UNREACH, $3,
AF_INET)) == NULL) {
yyerror("unknown icmp code %s", $3);
YYERROR;
}
$$.w = (p->type << 8) | p->code;
$$.b2 = 0;
}
| RETURNICMP6 '(' NUMBER ')' {
$$.w = (ICMP6_DST_UNREACH << 8) | $3;
$$.b2 = 0;
}
| RETURNICMP6 '(' STRING ')' {
struct icmpcodeent *p;
if ((p = geticmpcodebyname(ICMP6_DST_UNREACH, $3,
AF_INET6)) == NULL) {
yyerror("unknown icmp code %s", $3);
YYERROR;
}
$$.w = (p->type << 8) | p->code;
$$.b2 = 0;
}
;
dir : IN { $$ = PF_IN; }
| OUT { $$ = PF_OUT; }
;
log : /* empty */ { $$ = 0; }
| LOG { $$ = 1; }
| LOGALL { $$ = 2; }
;
quick : /* empty */ { $$ = 0; }
| QUICK { $$ = 1; }
;
interface : /* empty */ { $$ = NULL; }
| ON if_item_not { $$ = $2; }
| ON '{' if_list '}' { $$ = $3; }
;
if_list : if_item_not { $$ = $1; }
| if_list ',' if_item_not { $3->next = $1; $$ = $3; }
;
if_item_not : '!' if_item { $$ = $2; $$->not = 1; }
| if_item { $$ = $1; }
if_item : STRING {
if (ifa0_lookup($1) == NULL) {
yyerror("unknown interface %s", $1);
YYERROR;
}
$$ = malloc(sizeof(struct node_if));
if ($$ == NULL)
err(1, "if_item: malloc");
strlcpy($$->ifname, $1, IFNAMSIZ);
$$->not = 0;
$$->next = NULL;
}
;
af : /* empty */ { $$ = 0; }
| INET { $$ = AF_INET; }
| INET6 { $$ = AF_INET6; }
proto : /* empty */ { $$ = NULL; }
| PROTO proto_item { $$ = $2; }
| PROTO '{' proto_list '}' { $$ = $3; }
;
proto_list : proto_item { $$ = $1; }
| proto_list ',' proto_item { $3->next = $1; $$ = $3; }
;
proto_item : NUMBER {
struct protoent *p;
if ((p = getprotobynumber($1)) == NULL) {
yyerror("unknown protocol %d", $1);
YYERROR;
}
$$ = malloc(sizeof(struct node_proto));
if ($$ == NULL)
err(1, "proto_item: malloc");
$$->proto = p->p_proto;
$$->next = NULL;
}
| STRING {
struct protoent *p;
if ((p = getprotobyname($1)) == NULL) {
yyerror("unknown protocol %s", $1);
YYERROR;
}
$$ = malloc(sizeof(struct node_proto));
if ($$ == NULL)
err(1, "proto_item: malloc");
$$->proto = p->p_proto;
$$->next = NULL;
}
;
fromto : ALL {
$$.src.host = NULL;
$$.src.port = NULL;
$$.dst.host = NULL;
$$.dst.port = NULL;
}
| FROM ipportspec TO ipportspec {
$$.src = $2;
$$.dst = $4;
}
;
ipportspec : ipspec { $$.host = $1; $$.port = NULL; }
| ipspec PORT portspec {
$$.host = $1;
$$.port = $3;
}
;
ipspec : ANY { $$ = NULL; }
| xhost { $$ = $1; }
| '{' host_list '}' { $$ = $2; }
;
host_list : xhost { $$ = $1; }
| host_list ',' xhost { $3->next = $1; $$ = $3; }
;
xhost : '!' host { $$ = $2; $$->not = 1; }
| host { $$ = $1; }
;
host : address {
$$ = $1;
if ($$->af == AF_INET)
ipmask(&$$->mask, 32);
else
ipmask(&$$->mask, 128);
}
| address '/' NUMBER {
if ($$->af == AF_INET) {
if ($3 < 0 || $3 > 32) {
yyerror("illegal netmask value %d", $3);
YYERROR;
}
} else {
if ($3 < 0 || $3 > 128) {
yyerror("illegal netmask value %d", $3);
YYERROR;
}
}
$$ = $1;
ipmask(&$$->mask, $3);
}
;
address : STRING {
struct hostent *hp;
struct ifaddrs *ifa;
if (ifa0_lookup($1)) {
/* an interface with this name exists */
if ((ifa = ifa4_lookup($1))) {
struct sockaddr_in *sin =
(struct sockaddr_in *)
ifa->ifa_addr;
$$ = calloc(1,
sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = AF_INET;
memcpy(&$$->addr, &sin->sin_addr,
sizeof(u_int32_t));
} else if ((ifa = ifa6_lookup($1))) {
struct sockaddr_in6 *sin6 =
(struct sockaddr_in6 *)
ifa->ifa_addr;
$$ = calloc(1,
sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = AF_INET6;
memcpy(&$$->addr, &sin6->sin6_addr,
sizeof(struct pf_addr));
} else {
yyerror("interface %s has no IP "
"addresses", $1);
YYERROR;
}
}
else if ((hp = gethostbyname2($1, AF_INET)) == NULL) {
if ((hp = gethostbyname2($1, AF_INET6))
== NULL) {
yyerror("cannot resolve %s", $1);
YYERROR;
} else {
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = AF_INET6;
memcpy(&$$->addr, hp->h_addr,
sizeof(struct pf_addr));
}
} else {
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = AF_INET;
memcpy(&$$->addr, hp->h_addr, sizeof(u_int32_t));
}
}
| NUMBER '.' NUMBER '.' NUMBER '.' NUMBER {
if ($1 < 0 || $3 < 0 || $5 < 0 || $7 < 0 ||
$1 > 255 || $3 > 255 || $5 > 255 || $7 > 255) {
yyerror("illegal ip address %d.%d.%d.%d",
$1, $3, $5, $7);
YYERROR;
}
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = AF_INET;
$$->addr.addr32[0] = htonl(($1 << 24) |
($3 << 16) | ($5 << 8) | $7);
}
| IPV6ADDR { $$ = $1; }
;
portspec : port_item { $$ = $1; }
| '{' port_list '}' { $$ = $2; }
;
port_list : port_item { $$ = $1; }
| port_list ',' port_item { $3->next = $1; $$ = $3; }
;
port_item : port {
$$ = malloc(sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: malloc");
$$->port[0] = $1;
$$->port[1] = $1;
$$->op = PF_OP_EQ;
$$->next = NULL;
}
| PORTUNARY port {
$$ = malloc(sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: malloc");
$$->port[0] = $2;
$$->port[1] = $2;
$$->op = $1;
$$->next = NULL;
}
| port PORTBINARY port {
$$ = malloc(sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: malloc");
$$->port[0] = $1;
$$->port[1] = $3;
$$->op = $2;
$$->next = NULL;
}
;
port : NUMBER {
if ($1 <= 0 || $1 > 65535) {
yyerror("illegal port value %d", $1);
YYERROR;
}
$$ = htons($1);
}
| STRING {
struct servent *s = NULL;
s = getservbyname($1, "tcp");
if (s == NULL)
s = getservbyname($1, "udp");
if (s == NULL) {
yyerror("unknown protocol %s", $1);
YYERROR;
}
$$ = s->s_port;
}
;
flag : STRING {
int f;
if ((f = parse_flags($1)) < 0) {
yyerror("bad flags %s", $1);
YYERROR;
}
$$.b1 = f;
}
;
flags : /* empty */ { $$.b1 = 0; $$.b2 = 0; }
| FLAGS flag { $$.b1 = $2.b1; $$.b2 = 63; }
| FLAGS flag "/" flag { $$.b1 = $2.b1; $$.b2 = $4.b1; }
| FLAGS "/" flag { $$.b1 = 0; $$.b2 = $3.b1; }
;
icmpspec : /* empty */ { $$ = NULL; }
| ICMPTYPE icmp_item { $$ = $2; }
| ICMPTYPE '{' icmp_list '}' { $$ = $3; }
| ICMP6TYPE icmp6_item { $$ = $2; }
| ICMP6TYPE '{' icmp6_list '}' { $$ = $3; }
;
icmp_list : icmp_item { $$ = $1; }
| icmp_list ',' icmp_item { $3->next = $1; $$ = $3; }
;
icmp6_list : icmp6_item { $$ = $1; }
| icmp6_list ',' icmp6_item { $3->next = $1; $$ = $3; }
;
icmp_item : icmptype {
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
$$->type = $1;
$$->code = 0;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
}
| icmptype CODE NUMBER {
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
if ($3 < 0 || $3 > 255) {
yyerror("illegal icmp code %d", $3);
YYERROR;
}
$$->type = $1;
$$->code = $3 + 1;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
}
| icmptype CODE STRING {
struct icmpcodeent *p;
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
$$->type = $1;
if ((p = geticmpcodebyname($1, $3,
AF_INET)) == NULL) {
yyerror("unknown icmp-code %s", $3);
YYERROR;
}
$$->code = p->code + 1;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
}
;
icmp6_item : icmp6type {
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
$$->type = $1;
$$->code = 0;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
}
| icmp6type CODE NUMBER {
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
if ($3 < 0 || $3 > 255) {
yyerror("illegal icmp6 code %d", $3);
YYERROR;
}
$$->type = $1;
$$->code = $3 + 1;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
}
| icmp6type CODE STRING {
struct icmpcodeent *p;
$$ = malloc(sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: malloc");
$$->type = $1;
if ((p = geticmpcodebyname($1, $3,
AF_INET6)) == NULL) {
yyerror("unknown icmp6-code %s", $3);
YYERROR;
}
$$->code = p->code + 1;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
}
;
icmptype : STRING {
struct icmptypeent *p;
if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
yyerror("unknown icmp-type %s", $1);
YYERROR;
}
$$ = p->type + 1;
}
| NUMBER {
if ($1 < 0 || $1 > 255) {
yyerror("illegal icmp type %d", $1);
YYERROR;
}
$$ = $1 + 1;
}
;
icmp6type : STRING {
struct icmptypeent *p;
if ((p = geticmptypebyname($1, AF_INET6)) == NULL) {
yyerror("unknown ipv6-icmp-type %s", $1);
YYERROR;
}
$$ = p->type + 1;
}
| NUMBER {
if ($1 < 0 || $1 > 255) {
yyerror("illegal icmp6 type %d", $1);
YYERROR;
}
$$ = $1 + 1;
}
;
keep : /* empty */ { $$ = 0; }
| KEEP STATE { $$ = PF_STATE_NORMAL; }
| MODULATE STATE { $$ = PF_STATE_MODULATE; }
;
minttl : /* empty */ { $$ = 0; }
| MINTTL NUMBER {
if ($2 < 0 || $2 > 255) {
yyerror("illegal min-ttl value %d", $2);
YYERROR;
}
$$ = $2;
}
;
nodf : /* empty */ { $$ = 0; }
| NODF { $$ = 1; }
;
allowopts : /* empty */ { $$ = 0; }
| ALLOWOPTS { $$ = 1; }
label : /* empty */ { $$ = NULL; }
| LABEL STRING {
if (($$ = strdup($2)) == NULL) {
yyerror("rule label strdup() failed");
YYERROR;
}
}
;
no : /* empty */ { $$ = 0; }
| NO { $$ = 1; }
;
rport : port {
$$.a = $1;
$$.b = $$.t = 0;
}
| port ':' '*' {
$$.a = $1;
$$.b = 0;
$$.t = PF_RPORT_RANGE;
}
;
redirection : /* empty */ { $$ = NULL; }
| ARROW address {
$$ = malloc(sizeof(struct redirection));
if ($$ == NULL)
err(1, "redirection: malloc");
$$->address = $2;
$$->rport.a = $$->rport.b = $$->rport.t = 0;
}
| ARROW address PORT rport {
$$ = malloc(sizeof(struct redirection));
if ($$ == NULL)
err(1, "redirection: malloc");
$$->address = $2;
$$->rport = $4;
}
;
natrule : no NAT interface proto FROM ipspec TO ipspec redirection
{
struct pf_nat nat;
if (!natmode) {
yyerror("nat rule not permitted in filter mode");
YYERROR;
}
memset(&nat, 0, sizeof(nat));
nat.no = $1;
if ($3 != NULL) {
memcpy(nat.ifname, $3->ifname,
sizeof(nat.ifname));
nat.ifnot = $3->not;
free($3);
}
if ($4 != NULL) {
nat.proto = $4->proto;
free($4);
}
if ($6 != NULL && $8 != NULL && $6->af != $8->af) {
yyerror("nat ip versions must match");
YYERROR;
}
if ($6 != NULL) {
nat.af = $6->af;
memcpy(&nat.saddr, &$6->addr,
sizeof(nat.saddr));
memcpy(&nat.smask, &$6->mask,
sizeof(nat.smask));
nat.snot = $6->not;
free($6);
}
if ($8 != NULL) {
nat.af = $8->af;
memcpy(&nat.daddr, &$8->addr,
sizeof(nat.daddr));
memcpy(&nat.dmask, &$8->mask,
sizeof(nat.dmask));
nat.dnot = $8->not;
free($8);
}
if (nat.no) {
if ($9 != NULL) {
yyerror("'no nat' rule does not need '->'");
YYERROR;
}
} else {
if ($9 == NULL || $9->address == NULL) {
yyerror("'nat' rule requires '-> address'");
YYERROR;
}
if (nat.af && $9->address->af != nat.af) {
yyerror("nat ip versions must match");
YYERROR;
}
nat.af = $9->address->af;
memcpy(&nat.raddr, &$9->address->addr,
sizeof(nat.raddr));
free($9->address);
free($9);
}
pfctl_add_nat(pf, &nat);
}
;
binatrule : no BINAT interface proto FROM address TO ipspec redirection
{
struct pf_binat binat;
if (!natmode) {
yyerror("binat rule not permitted in filter mode");
YYERROR;
}
memset(&binat, 0, sizeof(binat));
binat.no = $1;
if ($3 != NULL) {
memcpy(binat.ifname, $3->ifname,
sizeof(binat.ifname));
free($3);
}
if ($4 != NULL) {
binat.proto = $4->proto;
free($4);
}
if ($6 != NULL && $8 != NULL && $6->af != $8->af) {
yyerror("binat ip versions must match");
YYERROR;
}
if ($6 != NULL) {
binat.af = $6->af;
memcpy(&binat.saddr, &$6->addr,
sizeof(binat.saddr));
free($6);
}
if ($8 != NULL) {
binat.af = $8->af;
memcpy(&binat.daddr, &$8->addr,
sizeof(binat.daddr));
memcpy(&binat.dmask, &$8->mask,
sizeof(binat.dmask));
binat.dnot = $8->not;
free($8);
}
if (binat.no) {
if ($9 != NULL) {
yyerror("'no binat' rule does not need"
" '->'");
YYERROR;
}
} else {
if ($9 == NULL || $9->address == NULL) {
yyerror("'binat' rule requires"
" '-> address'");
YYERROR;
}
if (binat.af && $9->address->af != binat.af) {
yyerror("binat ip versions must match");
YYERROR;
}
binat.af = $9->address->af;
memcpy(&binat.raddr, &$9->address->addr,
sizeof(binat.raddr));
free($9->address);
free($9);
}
pfctl_add_binat(pf, &binat);
}
rdrrule : no RDR interface proto FROM ipspec TO ipspec dport redirection
{
struct pf_rdr rdr;
if (!natmode) {
yyerror("rdr rule not permitted in filter mode");
YYERROR;
}
memset(&rdr, 0, sizeof(rdr));
rdr.no = $1;
if ($3 != NULL) {
memcpy(rdr.ifname, $3->ifname,
sizeof(rdr.ifname));
rdr.ifnot = $3->not;
free($3);
}
if ($4 != NULL) {
rdr.proto = $4->proto;
free($4);
}
if ($6 != NULL && $8 != NULL && $6->af != $8->af) {
yyerror("rdr ip versions must match");
YYERROR;
}
if ($6 != NULL) {
rdr.af = $6->af;
memcpy(&rdr.saddr, &$6->addr,
sizeof(rdr.saddr));
memcpy(&rdr.smask, &$6->mask,
sizeof(rdr.smask));
rdr.snot = $6->not;
free($6);
}
if ($8 != NULL) {
rdr.af = $8->af;
memcpy(&rdr.daddr, &$8->addr,
sizeof(rdr.daddr));
memcpy(&rdr.dmask, &$8->mask,
sizeof(rdr.dmask));
rdr.dnot = $8->not;
free($8);
}
rdr.dport = $9.a;
rdr.dport2 = $9.b;
rdr.opts |= $9.t;
if (rdr.no) {
if ($10 != NULL) {
yyerror("'no rdr' rule does not need '->'");
YYERROR;
}
} else {
if ($10 == NULL || $10->address == NULL) {
yyerror("'rdr' rule requires '-> address'");
YYERROR;