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/* $OpenBSD: parse.y,v 1.715 2023/11/02 20:47:31 sthen Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
* Copyright (c) 2001 Theo de Raadt. All rights reserved.
* Copyright (c) 2002 - 2013 Henning Brauer <henning@openbsd.org>
*
* 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/stat.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <netinet/in.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 <unistd.h>
#include <stdlib.h>
#include <netdb.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <err.h>
#include <limits.h>
#include <pwd.h>
#include <grp.h>
#include <md5.h>
#include "pfctl_parser.h"
#include "pfctl.h"
static struct pfctl *pf = NULL;
static int debug = 0;
static u_int16_t returnicmpdefault =
(ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
static u_int16_t returnicmp6default =
(ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
static int blockpolicy = PFRULE_DROP;
static int default_statelock;
TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
TAILQ_ENTRY(file) entry;
FILE *stream;
char *name;
size_t ungetpos;
size_t ungetsize;
u_char *ungetbuf;
int eof_reached;
int lineno;
int errors;
} *file, *topfile;
struct file *pushfile(const char *, int);
int popfile(void);
int check_file_secrecy(int, const char *);
int yyparse(void);
int yylex(void);
int yyerror(const char *, ...)
__attribute__((__format__ (printf, 1, 2)))
__attribute__((__nonnull__ (1)));
int kw_cmp(const void *, const void *);
int lookup(char *);
int igetc(void);
int lgetc(int);
void lungetc(int);
int findeol(void);
TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
TAILQ_ENTRY(sym) entry;
int used;
int persist;
char *nam;
char *val;
};
int symset(const char *, const char *, int);
char *symget(const char *);
int atoul(char *, u_long *);
struct node_proto {
u_int8_t proto;
struct node_proto *next;
struct node_proto *tail;
};
struct node_port {
u_int16_t port[2];
u_int8_t op;
struct node_port *next;
struct node_port *tail;
};
struct node_uid {
uid_t uid[2];
u_int8_t op;
struct node_uid *next;
struct node_uid *tail;
};
struct node_gid {
gid_t gid[2];
u_int8_t op;
struct node_gid *next;
struct node_gid *tail;
};
struct node_icmp {
u_int16_t code; /* aux. value 256 is legit */
u_int16_t type; /* aux. value 256 is legit */
u_int8_t proto;
struct node_icmp *next;
struct node_icmp *tail;
};
enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY,
PF_STATE_OPT_PFLOW };
enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
struct node_state_opt {
int type;
union {
u_int32_t max_states;
u_int32_t max_src_states;
u_int32_t max_src_conn;
struct {
u_int32_t limit;
u_int32_t seconds;
} max_src_conn_rate;
struct {
u_int8_t flush;
char tblname[PF_TABLE_NAME_SIZE];
} overload;
u_int32_t max_src_nodes;
u_int8_t src_track;
u_int32_t statelock;
struct {
int number;
u_int32_t seconds;
} timeout;
} data;
struct node_state_opt *next;
struct node_state_opt *tail;
};
struct peer {
struct node_host *host;
struct node_port *port;
};
struct node_queue {
char queue[PF_QNAME_SIZE];
char parent[PF_QNAME_SIZE];
char ifname[IFNAMSIZ];
int scheduler;
struct node_queue *next;
struct node_queue *tail;
};
struct node_qassign {
char *qname;
char *pqname;
};
struct range {
int a;
int b;
int t;
};
struct redirection {
struct node_host *host;
struct range rport;
};
struct pool_opts {
int marker;
#define POM_TYPE 0x01
#define POM_STICKYADDRESS 0x02
u_int8_t opts;
int type;
int staticport;
struct pf_poolhashkey *key;
} pool_opts;
struct divertspec {
struct node_host *addr;
u_int16_t port;
enum pf_divert_types type;
};
struct redirspec {
struct redirection *rdr;
struct pool_opts pool_opts;
int binat;
int af;
};
struct filter_opts {
int marker;
#define FOM_FLAGS 0x0001
#define FOM_ICMP 0x0002
#define FOM_TOS 0x0004
#define FOM_KEEP 0x0008
#define FOM_SRCTRACK 0x0010
#define FOM_MINTTL 0x0020
#define FOM_MAXMSS 0x0040
#define FOM_AFTO 0x0080
#define FOM_SETTOS 0x0100
#define FOM_SCRUB_TCP 0x0200
#define FOM_SETPRIO 0x0400
#define FOM_ONCE 0x1000
#define FOM_PRIO 0x2000
#define FOM_SETDELAY 0x4000
struct node_uid *uid;
struct node_gid *gid;
struct node_if *rcv;
struct {
u_int8_t b1;
u_int8_t b2;
u_int16_t w;
u_int16_t w2;
} flags;
struct node_icmp *icmpspec;
u_int32_t tos;
u_int32_t prob;
struct {
int action;
struct node_state_opt *options;
} keep;
int fragment;
int allowopts;
char *label;
struct node_qassign queues;
char *tag;
char *match_tag;
u_int8_t match_tag_not;
u_int rtableid;
u_int8_t prio;
u_int8_t set_prio[2];
u_int16_t delay;
struct divertspec divert;
struct redirspec nat;
struct redirspec rdr;
struct redirspec rroute;
u_int8_t rt;
/* scrub opts */
int nodf;
int minttl;
int settos;
int randomid;
int max_mss;
struct {
u_int32_t limit;
u_int32_t seconds;
} pktrate;
} filter_opts;
struct antispoof_opts {
char *label;
u_int rtableid;
} antispoof_opts;
struct scrub_opts {
int marker;
int nodf;
int minttl;
int maxmss;
int randomid;
int reassemble_tcp;
} scrub_opts;
struct node_sc {
struct node_queue_bw m1;
u_int d;
struct node_queue_bw m2;
};
struct node_fq {
u_int flows;
u_int quantum;
u_int target;
u_int interval;
};
struct queue_opts {
int marker;
#define QOM_BWSPEC 0x01
#define QOM_PARENT 0x02
#define QOM_DEFAULT 0x04
#define QOM_QLIMIT 0x08
#define QOM_FLOWS 0x10
#define QOM_QUANTUM 0x20
struct node_sc realtime;
struct node_sc linkshare;
struct node_sc upperlimit;
struct node_fq flowqueue;
char *parent;
int flags;
u_int qlimit;
} queue_opts;
struct table_opts {
int flags;
int init_addr;
struct node_tinithead init_nodes;
} table_opts;
struct node_hfsc_opts hfsc_opts;
struct node_state_opt *keep_state_defaults = NULL;
struct pfctl_watermarks syncookie_opts;
int validate_range(u_int8_t, u_int16_t, u_int16_t);
int disallow_table(struct node_host *, const char *);
int disallow_urpf_failed(struct node_host *, const char *);
int disallow_alias(struct node_host *, const char *);
int rule_consistent(struct pf_rule *);
int process_tabledef(char *, struct table_opts *, int);
void expand_label_str(char *, size_t, const char *, const char *);
void expand_label_if(const char *, char *, size_t, const char *);
void expand_label_addr(const char *, char *, size_t, u_int8_t,
struct node_host *);
void expand_label_port(const char *, char *, size_t,
struct node_port *);
void expand_label_proto(const char *, char *, size_t, u_int8_t);
void expand_label(char *, size_t, const char *, u_int8_t,
struct node_host *, struct node_port *, struct node_host *,
struct node_port *, u_int8_t);
int expand_divertspec(struct pf_rule *, struct divertspec *);
int collapse_redirspec(struct pf_pool *, struct pf_rule *,
struct redirspec *rs, int);
int apply_redirspec(struct pf_pool *, struct pf_rule *,
struct redirspec *, int, struct node_port *);
void expand_rule(struct pf_rule *, int, struct node_if *,
struct redirspec *, struct redirspec *, struct redirspec *,
struct node_proto *,
struct node_os *, struct node_host *, struct node_port *,
struct node_host *, struct node_port *, struct node_uid *,
struct node_gid *, struct node_if *, struct node_icmp *);
int expand_queue(char *, struct node_if *, struct queue_opts *);
int expand_skip_interface(struct node_if *);
int getservice(char *);
int rule_label(struct pf_rule *, char *);
void mv_rules(struct pf_ruleset *, struct pf_ruleset *);
void decide_address_family(struct node_host *, sa_family_t *);
int invalid_redirect(struct node_host *, sa_family_t);
u_int16_t parseicmpspec(char *, sa_family_t);
int kw_casecmp(const void *, const void *);
int map_tos(char *string, int *);
int lookup_rtable(u_int);
int filteropts_to_rule(struct pf_rule *, struct filter_opts *);
TAILQ_HEAD(loadanchorshead, loadanchors)
loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
struct loadanchors {
TAILQ_ENTRY(loadanchors) entries;
char *anchorname;
char *filename;
};
typedef struct {
union {
int64_t number;
double probability;
int i;
char *string;
u_int rtableid;
u_int16_t weight;
struct {
u_int8_t b1;
u_int8_t b2;
u_int16_t w;
u_int16_t w2;
} b;
struct range range;
struct node_if *interface;
struct node_proto *proto;
struct node_icmp *icmp;
struct node_host *host;
struct node_os *os;
struct node_port *port;
struct node_uid *uid;
struct node_gid *gid;
struct node_state_opt *state_opt;
struct peer peer;
struct {
struct peer src, dst;
struct node_os *src_os;
} fromto;
struct redirection *redirection;
struct {
int action;
struct node_state_opt *options;
} keep_state;
struct {
u_int8_t log;
u_int8_t logif;
u_int8_t quick;
} logquick;
struct {
int neg;
char *name;
} tagged;
struct pf_poolhashkey *hashkey;
struct node_queue *queue;
struct node_queue_opt queue_options;
struct node_queue_bw queue_bwspec;
struct node_qassign qassign;
struct node_sc sc;
struct filter_opts filter_opts;
struct antispoof_opts antispoof_opts;
struct queue_opts queue_opts;
struct scrub_opts scrub_opts;
struct table_opts table_opts;
struct pool_opts pool_opts;
struct node_hfsc_opts hfsc_opts;
struct pfctl_watermarks *watermarks;
} v;
int lineno;
} YYSTYPE;
#define PPORT_RANGE 1
#define PPORT_STAR 2
int parseport(char *, struct range *r, int);
#define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
(!((addr).iflags & PFI_AFLAG_NOALIAS) || \
!isdigit((unsigned char)(addr).v.ifname[strlen((addr).v.ifname)-1])))
%}
%token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
%token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
%token ICMP6TYPE CODE KEEP MODULATE STATE PORT BINATTO NODF
%token MINTTL ERROR ALLOWOPTS FILENAME ROUTETO DUPTO REPLYTO NO LABEL
%token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
%token REASSEMBLE ANCHOR SYNCOOKIES
%token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
%token SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
%token ANTISPOOF FOR INCLUDE MATCHES
%token BITMASK RANDOM SOURCEHASH ROUNDROBIN LEASTSTATES STATICPORT PROBABILITY
%token WEIGHT BANDWIDTH FLOWS QUANTUM
%token QUEUE PRIORITY QLIMIT RTABLE RDOMAIN MINIMUM BURST PARENT
%token LOAD RULESET_OPTIMIZATION RTABLE RDOMAIN PRIO ONCE DEFAULT DELAY
%token STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
%token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW MAXPKTRATE
%token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE
%token DIVERTTO DIVERTREPLY DIVERTPACKET NATTO AFTO RDRTO RECEIVEDON NE LE GE
%token <v.string> STRING
%token <v.number> NUMBER
%token <v.i> PORTBINARY
%type <v.interface> interface if_list if_item_not if_item
%type <v.number> number icmptype icmp6type uid gid
%type <v.number> tos not yesno optnodf
%type <v.probability> probability
%type <v.weight> optweight
%type <v.i> dir af optimizer syncookie_val
%type <v.i> sourcetrack flush unaryop statelock
%type <v.b> action
%type <v.b> flags flag blockspec prio
%type <v.range> portplain portstar portrange
%type <v.hashkey> hashkey
%type <v.proto> proto proto_list proto_item
%type <v.number> protoval
%type <v.icmp> icmpspec
%type <v.icmp> icmp_list icmp_item
%type <v.icmp> icmp6_list icmp6_item
%type <v.number> reticmpspec reticmp6spec
%type <v.fromto> fromto
%type <v.peer> ipportspec from to
%type <v.host> ipspec xhost host dynaddr host_list
%type <v.host> table_host_list tablespec
%type <v.host> redir_host_list redirspec
%type <v.os> os xos os_list
%type <v.port> portspec port_list port_item
%type <v.uid> uids uid_list uid_item
%type <v.gid> gids gid_list gid_item
%type <v.redirection> redirpool
%type <v.string> label stringall anchorname
%type <v.string> string varstring numberstring
%type <v.keep_state> keep
%type <v.state_opt> state_opt_spec state_opt_list state_opt_item
%type <v.logquick> logquick quick log logopts logopt
%type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if
%type <v.qassign> qname
%type <v.queue_bwspec> bandwidth
%type <v.filter_opts> filter_opts filter_opt filter_opts_l
%type <v.filter_opts> filter_sets filter_set filter_sets_l
%type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l
%type <v.queue_opts> queue_opts queue_opt queue_opts_l optscs
%type <v.sc> scspec
%type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l
%type <v.table_opts> table_opts table_opt table_opts_l
%type <v.pool_opts> pool_opts pool_opt pool_opts_l
%type <v.watermarks> syncookie_opts
%%
ruleset : /* empty */
| ruleset include '\n'
| ruleset '\n'
| ruleset option '\n'
| ruleset pfrule '\n'
| ruleset anchorrule '\n'
| ruleset loadrule '\n'
| ruleset queuespec '\n'
| ruleset varset '\n'
| ruleset antispoof '\n'
| ruleset tabledef '\n'
| '{' fakeanchor '}' '\n';
| ruleset error '\n' { file->errors++; }
;
include : INCLUDE STRING {
struct file *nfile;
if ((nfile = pushfile($2, 0)) == NULL) {
yyerror("failed to include file %s", $2);
free($2);
YYERROR;
}
free($2);
file = nfile;
lungetc('\n');
}
;
/*
* apply to previously specified rule: must be careful to note
* what that is: pf or nat or binat or rdr
*/
fakeanchor : fakeanchor '\n'
| fakeanchor anchorrule '\n'
| fakeanchor pfrule '\n'
| fakeanchor error '\n'
;
optimizer : string {
if (!strcmp($1, "none"))
$$ = 0;
else if (!strcmp($1, "basic"))
$$ = PF_OPTIMIZE_BASIC;
else if (!strcmp($1, "profile"))
$$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
else {
yyerror("unknown ruleset-optimization %s", $1);
YYERROR;
}
}
;
optnodf : /* empty */ { $$ = 0; }
| NODF { $$ = 1; }
;
option : SET REASSEMBLE yesno optnodf {
pfctl_set_reassembly(pf, $3, $4);
}
| SET OPTIMIZATION STRING {
if (pfctl_set_optimization(pf, $3) != 0) {
yyerror("unknown optimization %s", $3);
free($3);
YYERROR;
}
free($3);
}
| SET RULESET_OPTIMIZATION optimizer {
if (!(pf->opts & PF_OPT_OPTIMIZE)) {
pf->opts |= PF_OPT_OPTIMIZE;
pf->optimize = $3;
}
}
| SET TIMEOUT timeout_spec
| SET TIMEOUT '{' optnl timeout_list '}'
| SET LIMIT limit_spec
| SET LIMIT '{' optnl limit_list '}'
| SET LOGINTERFACE stringall {
if (pfctl_set_logif(pf, $3) != 0) {
yyerror("error setting loginterface %s", $3);
free($3);
YYERROR;
}
free($3);
}
| SET HOSTID number {
if ($3 == 0 || $3 > UINT_MAX) {
yyerror("hostid must be non-zero");
YYERROR;
}
pfctl_set_hostid(pf, $3);
}
| SET BLOCKPOLICY DROP {
if (pf->opts & PF_OPT_VERBOSE)
printf("set block-policy drop\n");
blockpolicy = PFRULE_DROP;
}
| SET BLOCKPOLICY RETURN {
if (pf->opts & PF_OPT_VERBOSE)
printf("set block-policy return\n");
blockpolicy = PFRULE_RETURN;
}
| SET FINGERPRINTS STRING {
if (pf->opts & PF_OPT_VERBOSE)
printf("set fingerprints \"%s\"\n", $3);
if (!pf->anchor->name[0]) {
if (pfctl_file_fingerprints(pf->dev,
pf->opts, $3)) {
yyerror("error loading "
"fingerprints %s", $3);
free($3);
YYERROR;
}
}
free($3);
}
| SET STATEPOLICY statelock {
if (pf->opts & PF_OPT_VERBOSE)
switch ($3) {
case 0:
printf("set state-policy floating\n");
break;
case PFRULE_IFBOUND:
printf("set state-policy if-bound\n");
break;
}
default_statelock = $3;
}
| SET DEBUG STRING {
if (pfctl_set_debug(pf, $3) != 0) {
yyerror("error setting debuglevel %s", $3);
free($3);
YYERROR;
}
free($3);
}
| SET DEBUG DEBUG {
if (pfctl_set_debug(pf, "debug") != 0) {
yyerror("error setting debuglevel %s", "debug");
YYERROR;
}
}
| SET SKIP interface {
if (expand_skip_interface($3) != 0) {
yyerror("error setting skip interface(s)");
YYERROR;
}
}
| SET STATEDEFAULTS state_opt_list {
if (keep_state_defaults != NULL) {
yyerror("cannot redefine state-defaults");
YYERROR;
}
keep_state_defaults = $3;
}
| SET SYNCOOKIES syncookie_val syncookie_opts {
if (pfctl_set_syncookies(pf, $3, $4)) {
yyerror("error setting syncookies");
YYERROR;
}
}
;
syncookie_val : STRING {
if (!strcmp($1, "never"))
$$ = PF_SYNCOOKIES_NEVER;
else if (!strcmp($1, "adaptive"))
$$ = PF_SYNCOOKIES_ADAPTIVE;
else if (!strcmp($1, "always"))
$$ = PF_SYNCOOKIES_ALWAYS;
else {
yyerror("illegal value for syncookies");
YYERROR;
}
}
;
syncookie_opts : /* empty */ { $$ = NULL; }
| {
memset(&syncookie_opts, 0, sizeof(syncookie_opts));
} '(' syncookie_opt_l ')' { $$ = &syncookie_opts; }
;
syncookie_opt_l : syncookie_opt_l comma syncookie_opt
| syncookie_opt
;
syncookie_opt : STRING STRING {
double val;
char *cp;
val = strtod($2, &cp);
if (cp == NULL || strcmp(cp, "%"))
YYERROR;
if (val <= 0 || val > 100) {
yyerror("illegal percentage value");
YYERROR;
}
if (!strcmp($1, "start")) {
syncookie_opts.hi = val;
} else if (!strcmp($1, "end")) {
syncookie_opts.lo = val;
} else {
yyerror("illegal syncookie option");
YYERROR;
}
}
;
stringall : STRING { $$ = $1; }
| ALL {
if (($$ = strdup("all")) == NULL) {
err(1, "stringall: strdup");
}
}
;
string : STRING string {
if (asprintf(&$$, "%s %s", $1, $2) == -1)
err(1, "string: asprintf");
free($1);
free($2);
}
| STRING
;
varstring : numberstring varstring {
if (asprintf(&$$, "%s %s", $1, $2) == -1)
err(1, "string: asprintf");
free($1);
free($2);
}
| numberstring
;
numberstring : NUMBER {
char *s;
if (asprintf(&s, "%lld", $1) == -1) {
yyerror("string: asprintf");
YYERROR;
}
$$ = s;
}
| STRING
;
varset : STRING '=' varstring {
char *s = $1;
if (pf->opts & PF_OPT_VERBOSE)
printf("%s = \"%s\"\n", $1, $3);
while (*s++) {
if (isspace((unsigned char)*s)) {
yyerror("macro name cannot contain "
"whitespace");
free($1);
free($3);
YYERROR;
}
}
if (symset($1, $3, 0) == -1)
err(1, "cannot store variable %s", $1);
free($1);
free($3);
}
;
anchorname : STRING {
if ($1[0] == '\0') {
free($1);
yyerror("anchor name must not be empty");
YYERROR;
}
if (strlen(pf->anchor->path) + 1 +
strlen($1) >= PATH_MAX) {
free($1);
yyerror("anchor name is longer than %u",
PATH_MAX - 1);
YYERROR;
}
if ($1[0] == '_' || strstr($1, "/_") != NULL) {
free($1);
yyerror("anchor names beginning with '_' "
"are reserved for internal use");
YYERROR;
}
$$ = $1;
}
| /* empty */ { $$ = NULL; }
;
pfa_anchorlist : /* empty */
| pfa_anchorlist '\n'
| pfa_anchorlist pfrule '\n'
| pfa_anchorlist anchorrule '\n'
| pfa_anchorlist include '\n'
;
pfa_anchor : '{'
{
char ta[PF_ANCHOR_NAME_SIZE];
struct pf_ruleset *rs;
/* steping into a brace anchor */
pf->asd++;
if (pf->asd >= PFCTL_ANCHOR_STACK_DEPTH)
errx(1, "pfa_anchor: anchors too deep");
pf->bn++;
pf->brace = 1;
/*
* Anchor contents are parsed before the anchor rule
* production completes, so we don't know the real
* location yet. Create a holding ruleset in the root;
* contents will be moved afterwards.
*/
snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
rs = pf_find_or_create_ruleset(ta);
if (rs == NULL)
err(1, "pfa_anchor: pf_find_or_create_ruleset");
pf->astack[pf->asd] = rs->anchor;
pf->anchor = rs->anchor;
} '\n' pfa_anchorlist '}'
{
pf->alast = pf->anchor;
pf->asd--;
pf->anchor = pf->astack[pf->asd];
}
| /* empty */
;
anchorrule : ANCHOR anchorname dir quick interface af proto fromto
filter_opts pfa_anchor
{
struct pf_rule r;
struct node_proto *proto;
char *p;
memset(&r, 0, sizeof(r));
if (pf->astack[pf->asd + 1]) {
if ($2 && strchr($2, '/') != NULL) {
free($2);
yyerror("anchor paths containing '/' "
"cannot be used for inline anchors.");
YYERROR;
}
/* Move inline rules into relative location. */
pf_anchor_setup(&r,
&pf->astack[pf->asd]->ruleset,
$2 ? $2 : pf->alast->name);
if (r.anchor == NULL)
err(1, "anchorrule: unable to "
"create ruleset");
if (pf->alast != r.anchor) {
if (r.anchor->match) {
yyerror("inline anchor '%s' "
"already exists",
r.anchor->name);
YYERROR;
}
mv_rules(&pf->alast->ruleset,
&r.anchor->ruleset);
}
pf_remove_if_empty_ruleset(&pf->alast->ruleset);
pf->alast = r.anchor;
} else {
if (!$2) {
yyerror("anchors without explicit "
"rules must specify a name");
YYERROR;
}
/*
* Don't make non-brace anchors part of the main anchor pool.
*/
if ((r.anchor = calloc(1, sizeof(*r.anchor))) == NULL) {
err(1, "anchorrule: calloc");
}
pf_init_ruleset(&r.anchor->ruleset);
r.anchor->ruleset.anchor = r.anchor;
if (strlcpy(r.anchor->path, $2,
sizeof(r.anchor->path)) >= sizeof(r.anchor->path)) {
errx(1, "anchorrule: strlcpy");
}
if ((p = strrchr($2, '/')) != NULL) {
if (strlen(p) == 1) {
yyerror("anchorrule: bad anchor name %s",
$2);
YYERROR;
}
} else
p = $2;
if (strlcpy(r.anchor->name, p,
sizeof(r.anchor->name)) >= sizeof(r.anchor->name)) {
errx(1, "anchorrule: strlcpy");
}
}
r.direction = $3;
r.quick = $4.quick;
r.af = $6;
if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
for (proto = $7; proto != NULL &&
proto->proto != IPPROTO_TCP;
proto = proto->next)
; /* nothing */
if (proto == NULL && $7 != NULL) {
if ($9.flags.b1 || $9.flags.b2)
yyerror(
"flags only apply to tcp");
if ($8.src_os)
yyerror(
"OS fingerprinting only "
"applies to tcp");
YYERROR;
}
}
if (filteropts_to_rule(&r, &$9))
YYERROR;
if ($9.keep.action) {
yyerror("cannot specify state handling "
"on anchors");
YYERROR;
}
if ($9.rt) {
yyerror("cannot specify route handling "
"on anchors");
YYERROR;
}
decide_address_family($8.src.host, &r.af);
decide_address_family($8.dst.host, &r.af);
expand_rule(&r, 0, $5, NULL, NULL, NULL, $7, $8.src_os,
$8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
$9.uid, $9.gid, $9.rcv, $9.icmpspec);
free($2);
pf->astack[pf->asd + 1] = NULL;
}
;
loadrule : LOAD ANCHOR anchorname FROM string {
struct loadanchors *loadanchor;
if ($3 == NULL) {
yyerror("anchor name is missing");
YYERROR;
}
loadanchor = calloc(1, sizeof(struct loadanchors));
if (loadanchor == NULL)
err(1, "loadrule: calloc");
if ((loadanchor->anchorname = malloc(PATH_MAX)) ==
NULL)
err(1, "loadrule: malloc");
if (pf->anchor->name[0])
snprintf(loadanchor->anchorname, PATH_MAX,
"%s/%s", pf->anchor->path, $3);
else
strlcpy(loadanchor->anchorname, $3, PATH_MAX);
if ((loadanchor->filename = strdup($5)) == NULL)
err(1, "loadrule: strdup");
TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
entries);
free($3);
free($5);
};
scrub_opts : {
bzero(&scrub_opts, sizeof scrub_opts);
}
scrub_opts_l
{ $$ = scrub_opts; }
;
scrub_opts_l : scrub_opts_l comma scrub_opt
| scrub_opt
;
scrub_opt : NODF {
if (scrub_opts.nodf) {
yyerror("no-df cannot be respecified");
YYERROR;
}
scrub_opts.nodf = 1;
}
| MINTTL NUMBER {
if (scrub_opts.marker & FOM_MINTTL) {
yyerror("min-ttl cannot be respecified");
YYERROR;
}
if ($2 < 0 || $2 > 255) {
yyerror("illegal min-ttl value %lld", $2);
YYERROR;
}
scrub_opts.marker |= FOM_MINTTL;
scrub_opts.minttl = $2;
}
| MAXMSS NUMBER {
if (scrub_opts.marker & FOM_MAXMSS) {
yyerror("max-mss cannot be respecified");
YYERROR;
}
if ($2 < 0 || $2 > 65535) {
yyerror("illegal max-mss value %lld", $2);
YYERROR;
}
scrub_opts.marker |= FOM_MAXMSS;
scrub_opts.maxmss = $2;
}
| REASSEMBLE STRING {
if (strcasecmp($2, "tcp") != 0) {
yyerror("scrub reassemble supports only tcp, "
"not '%s'", $2);
free($2);
YYERROR;
}
free($2);
if (scrub_opts.reassemble_tcp) {
yyerror("reassemble tcp cannot be respecified");
YYERROR;
}
scrub_opts.reassemble_tcp = 1;
}
| RANDOMID {
if (scrub_opts.randomid) {
yyerror("random-id cannot be respecified");
YYERROR;
}
scrub_opts.randomid = 1;
}
;
antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
struct pf_rule r;
struct node_host *h = NULL, *hh;
struct node_if *i, *j;
for (i = $3; i; i = i->next) {
bzero(&r, sizeof(r));
r.action = PF_DROP;
r.direction = PF_IN;
r.log = $2.log;
r.logif = $2.logif;
r.quick = $2.quick;
r.af = $4;
if (rule_label(&r, $5.label))
YYERROR;
r.rtableid = $5.rtableid;
j = calloc(1, sizeof(struct node_if));
if (j == NULL)
err(1, "antispoof: calloc");
if (strlcpy(j->ifname, i->ifname,
sizeof(j->ifname)) >= sizeof(j->ifname)) {
free(j);
yyerror("interface name too long");
YYERROR;
}
j->not = 1;
if (i->dynamic) {
h = calloc(1, sizeof(*h));
if (h == NULL)
err(1, "address: calloc");
h->addr.type = PF_ADDR_DYNIFTL;
set_ipmask(h, 128);
if (strlcpy(h->addr.v.ifname, i->ifname,
sizeof(h->addr.v.ifname)) >=
sizeof(h->addr.v.ifname)) {
free(h);
yyerror(
"interface name too long");
YYERROR;
}
hh = malloc(sizeof(*hh));
if (hh == NULL)
err(1, "address: malloc");
bcopy(h, hh, sizeof(*hh));
h->addr.iflags = PFI_AFLAG_NETWORK;
} else {
h = ifa_lookup(j->ifname,
PFI_AFLAG_NETWORK);
hh = NULL;
}
if (h != NULL)
expand_rule(&r, 0, j, NULL, NULL, NULL,
NULL, NULL, h, NULL, NULL, NULL,
NULL, NULL, NULL, NULL);
if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
bzero(&r, sizeof(r));
r.action = PF_DROP;
r.direction = PF_IN;
r.log = $2.log;
r.logif = $2.logif;
r.quick = $2.quick;
r.af = $4;
if (rule_label(&r, $5.label))
YYERROR;
r.rtableid = $5.rtableid;
if (hh != NULL)
h = hh;
else
h = ifa_lookup(i->ifname, 0);
if (h != NULL)
expand_rule(&r, 0, NULL, NULL,
NULL, NULL, NULL, NULL, h,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL);
} else
free(hh);
}
free($5.label);
}
;
antispoof_ifspc : FOR antispoof_if { $$ = $2; }
| FOR '{' optnl antispoof_iflst '}' { $$ = $4; }
;
antispoof_iflst : antispoof_if optnl { $$ = $1; }
| antispoof_iflst comma antispoof_if optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
antispoof_if : if_item { $$ = $1; }
| '(' if_item ')' {
$2->dynamic = 1;
$$ = $2;
}
;
antispoof_opts : {
bzero(&antispoof_opts, sizeof antispoof_opts);
antispoof_opts.rtableid = -1;
}
antispoof_opts_l
{ $$ = antispoof_opts; }
| /* empty */ {
bzero(&antispoof_opts, sizeof antispoof_opts);
antispoof_opts.rtableid = -1;
$$ = antispoof_opts;
}
;
antispoof_opts_l : antispoof_opts_l antispoof_opt
| antispoof_opt
;
antispoof_opt : LABEL label {
if (antispoof_opts.label) {
yyerror("label cannot be redefined");
YYERROR;
}
antispoof_opts.label = $2;
}
| RTABLE NUMBER {
if ($2 < 0 || $2 > RT_TABLEID_MAX) {
yyerror("invalid rtable id");
YYERROR;
} else if (!lookup_rtable($2)) {
yyerror("rtable %lld does not exist", $2);
YYERROR;
}
antispoof_opts.rtableid = $2;
}
;
not : '!' { $$ = 1; }
| /* empty */ { $$ = 0; }
;
tabledef : TABLE '<' STRING '>' table_opts {
struct node_host *h, *nh;
struct node_tinit *ti, *nti;
if (strlen($3) >= PF_TABLE_NAME_SIZE) {
yyerror("table name too long, max %d chars",
PF_TABLE_NAME_SIZE - 1);
free($3);
YYERROR;
}
if (process_tabledef($3, &$5, pf->opts)) {
free($3);
YYERROR;
}
free($3);
for (ti = SIMPLEQ_FIRST(&$5.init_nodes); ti != NULL;
ti = nti) {
if (ti->file)
free(ti->file);
for (h = ti->host; h != NULL; h = nh) {
nh = h->next;
free(h);
}
nti = SIMPLEQ_NEXT(ti, entries);
free(ti);
}
}
;
table_opts : {
bzero(&table_opts, sizeof table_opts);
SIMPLEQ_INIT(&table_opts.init_nodes);
}
table_opts_l
{ $$ = table_opts; }
| /* empty */
{
bzero(&table_opts, sizeof table_opts);
SIMPLEQ_INIT(&table_opts.init_nodes);
$$ = table_opts;
}
;
table_opts_l : table_opts_l table_opt
| table_opt
;
table_opt : STRING {
if (!strcmp($1, "const"))
table_opts.flags |= PFR_TFLAG_CONST;
else if (!strcmp($1, "persist"))
table_opts.flags |= PFR_TFLAG_PERSIST;
else if (!strcmp($1, "counters"))
table_opts.flags |= PFR_TFLAG_COUNTERS;
else {
yyerror("invalid table option '%s'", $1);
free($1);
YYERROR;
}
free($1);
}
| '{' optnl '}' { table_opts.init_addr = 1; }
| '{' optnl table_host_list '}' {
struct node_host *n;
struct node_tinit *ti;
for (n = $3; n != NULL; n = n->next) {
switch (n->addr.type) {
case PF_ADDR_ADDRMASK:
continue; /* ok */
case PF_ADDR_RANGE:
yyerror("address ranges are not "
"permitted inside tables");
break;
case PF_ADDR_DYNIFTL:
yyerror("dynamic addresses are not "
"permitted inside tables");
break;
case PF_ADDR_TABLE:
yyerror("tables cannot contain tables");
break;
case PF_ADDR_NOROUTE:
yyerror("\"no-route\" is not permitted "
"inside tables");
break;
case PF_ADDR_URPFFAILED:
yyerror("\"urpf-failed\" is not "
"permitted inside tables");
break;
default:
yyerror("unknown address type %d",
n->addr.type);
}
YYERROR;
}
if (!(ti = calloc(1, sizeof(*ti))))
err(1, "table_opt: calloc");
ti->host = $3;
SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
entries);
table_opts.init_addr = 1;
}
| FILENAME STRING {
struct node_tinit *ti;
if (!(ti = calloc(1, sizeof(*ti))))
err(1, "table_opt: calloc");
ti->file = $2;
SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
entries);
table_opts.init_addr = 1;
}
;
tablespec : xhost optweight {
if ($2 > 0) {
struct node_host *n;
for (n = $1; n != NULL; n = n->next)
n->weight = $2;
}
$$ = $1;
}
| '{' optnl table_host_list '}' { $$ = $3; }
;
table_host_list : tablespec optnl { $$ = $1; }
| table_host_list comma tablespec optnl {
$1->tail->next = $3;
$1->tail = $3->tail;
$$ = $1;
}
;
queuespec : QUEUE STRING interface queue_opts {
struct node_host *n;
if ($3 == NULL && $4.parent == NULL) {
yyerror("root queue without interface");
YYERROR;
}
if ($3 != NULL &&
((n = ifa_exists($3->ifname)) == NULL ||
n->af != AF_LINK)) {
yyerror("not an interface");
YYERROR;
}
expand_queue($2, $3, &$4);
}
;
queue_opts : {
bzero(&queue_opts, sizeof queue_opts);
}
queue_opts_l
{ $$ = queue_opts; }
;
queue_opts_l : queue_opts_l queue_opt
| queue_opt
;
queue_opt : BANDWIDTH scspec optscs {
if (queue_opts.marker & QOM_BWSPEC) {
yyerror("bandwidth cannot be respecified");
YYERROR;
}
queue_opts.marker |= QOM_BWSPEC;
queue_opts.linkshare = $2;
queue_opts.realtime= $3.realtime;
queue_opts.upperlimit = $3.upperlimit;
}
| PARENT STRING {
if (queue_opts.marker & QOM_PARENT) {
yyerror("parent cannot be respecified");
YYERROR;
}
queue_opts.marker |= QOM_PARENT;
queue_opts.parent = $2;
}
| DEFAULT {
if (queue_opts.marker & QOM_DEFAULT) {
yyerror("default cannot be respecified");
YYERROR;
}
queue_opts.marker |= QOM_DEFAULT;
queue_opts.flags |= PFQS_DEFAULT;
}
| QLIMIT NUMBER {
if (queue_opts.marker & QOM_QLIMIT) {
yyerror("qlimit cannot be respecified");
YYERROR;
}
if ($2 < 0 || $2 > 65535) {
yyerror("qlimit out of range: max 65535");
YYERROR;
}
queue_opts.marker |= QOM_QLIMIT;
queue_opts.qlimit = $2;
}
| FLOWS NUMBER {
if (queue_opts.marker & QOM_FLOWS) {
yyerror("number of flows cannot be respecified");
YYERROR;
}
if ($2 < 1 || $2 > 32767) {
yyerror("number of flows out of range: "
"max 32767");
YYERROR;
}
queue_opts.marker |= QOM_FLOWS;
queue_opts.flags |= PFQS_FLOWQUEUE;
queue_opts.flowqueue.flows = $2;
}
| QUANTUM NUMBER {
if (queue_opts.marker & QOM_QUANTUM) {
yyerror("quantum cannot be respecified");
YYERROR;
}
if ($2 < 1 || $2 > 65535) {
yyerror("quantum out of range: max 65535");
YYERROR;
}
queue_opts.marker |= QOM_QUANTUM;
queue_opts.flowqueue.quantum = $2;
}
;
optscs : /* nada */ {
}
| comma MINIMUM scspec {
$$.realtime = $3;
}
| comma MAXIMUM scspec {
$$.upperlimit = $3;
}
| comma MINIMUM scspec comma MAXIMUM scspec {
$$.realtime = $3;
$$.upperlimit = $6;
}
| comma MAXIMUM scspec comma MINIMUM scspec {
$$.realtime = $6;
$$.upperlimit = $3;
}
;
scspec : bandwidth {
$$.m2 = $1;
$$.d = 0;
if ($$.m2.bw_percent) {
yyerror("no bandwidth in %% yet");
YYERROR;
}
}
| bandwidth BURST bandwidth FOR STRING {
u_long ul;
char *cp;
ul = strtoul($5, &cp, 10);
if (cp == NULL || strcmp(cp, "ms")) {
yyerror("time in scspec must be in ms");
YYERROR;
}
$$.m1 = $3;
$$.d = ul;
$$.m2 = $1;
if ($$.m1.bw_percent || $$.m2.bw_percent) {
yyerror("no bandwidth in %% yet");
YYERROR;
}
}
;
bandwidth : STRING {
double bps;
char *cp;
$$.bw_percent = 0;
bps = strtod($1, &cp);
if (cp != NULL) {
if (strlen(cp) > 1) {
char *cu = cp + 1;
if (!strcmp(cu, "Bit") ||
!strcmp(cu, "B") ||
!strcmp(cu, "bit") ||
!strcmp(cu, "b")) {
*cu = 0;
}
}
if (!strcmp(cp, "b"))
; /* nothing */
else if (!strcmp(cp, "K"))
bps *= 1000;
else if (!strcmp(cp, "M"))
bps *= 1000 * 1000;
else if (!strcmp(cp, "G"))
bps *= 1000 * 1000 * 1000;
else if (!strcmp(cp, "%")) {
if (bps < 0 || bps > 100) {
yyerror("bandwidth spec "
"out of range");
free($1);
YYERROR;
}
$$.bw_percent = bps;
bps = 0;
} else {
yyerror("unknown unit \"%s\"", cp);
free($1);
YYERROR;
}
}
free($1);
$$.bw_absolute = (u_int32_t)bps;
}
| NUMBER {
if ($1 < 0 || $1 > UINT_MAX) {
yyerror("bandwidth number too big");
YYERROR;
}
$$.bw_percent = 0;
$$.bw_absolute = $1;
}
;
pfrule : action dir logquick interface af proto fromto
filter_opts
{
struct pf_rule r;
struct node_state_opt *o;
struct node_proto *proto;
int srctrack = 0;
int statelock = 0;
int adaptive = 0;
int defaults = 0;
memset(&r, 0, sizeof(r));
r.action = $1.b1;
switch ($1.b2) {
case PFRULE_RETURNRST:
r.rule_flag |= PFRULE_RETURNRST;
r.return_ttl = $1.w;
break;
case PFRULE_RETURNICMP:
r.rule_flag |= PFRULE_RETURNICMP;
r.return_icmp = $1.w;
r.return_icmp6 = $1.w2;
break;
case PFRULE_RETURN:
r.rule_flag |= PFRULE_RETURN;
r.return_icmp = $1.w;
r.return_icmp6 = $1.w2;
break;
}
r.direction = $2;
r.log = $3.log;
r.logif = $3.logif;
r.quick = $3.quick;
r.af = $5;
if (filteropts_to_rule(&r, &$8))
YYERROR;
if ($8.flags.b1 || $8.flags.b2 || $7.src_os) {
for (proto = $6; proto != NULL &&
proto->proto != IPPROTO_TCP;
proto = proto->next)
; /* nothing */
if (proto == NULL && $6 != NULL) {
if ($8.flags.b1 || $8.flags.b2)
yyerror(
"flags only apply to tcp");
if ($7.src_os)
yyerror(
"OS fingerprinting only "
"apply to tcp");
YYERROR;
}
}
r.keep_state = $8.keep.action;
o = $8.keep.options;
/* 'keep state' by default on pass rules. */
if (!r.keep_state && !r.action &&
!($8.marker & FOM_KEEP)) {
r.keep_state = PF_STATE_NORMAL;
o = keep_state_defaults;
defaults = 1;
}
while (o) {
struct node_state_opt *p = o;
switch (o->type) {
case PF_STATE_OPT_MAX:
if (r.max_states) {
yyerror("state option 'max' "
"multiple definitions");
YYERROR;
}
r.max_states = o->data.max_states;
break;
case PF_STATE_OPT_NOSYNC:
if (r.rule_flag & PFRULE_NOSYNC) {
yyerror("state option 'sync' "
"multiple definitions");
YYERROR;
}
r.rule_flag |= PFRULE_NOSYNC;
break;
case PF_STATE_OPT_SRCTRACK:
if (srctrack) {
yyerror("state option "
"'source-track' "
"multiple definitions");
YYERROR;
}
srctrack = o->data.src_track;
r.rule_flag |= PFRULE_SRCTRACK;
break;
case PF_STATE_OPT_MAX_SRC_STATES:
if (r.max_src_states) {
yyerror("state option "
"'max-src-states' "
"multiple definitions");
YYERROR;
}
if (o->data.max_src_states == 0) {
yyerror("'max-src-states' must "
"be > 0");
YYERROR;
}
r.max_src_states =
o->data.max_src_states;
r.rule_flag |= PFRULE_SRCTRACK;
break;
case PF_STATE_OPT_OVERLOAD:
if (r.overload_tblname[0]) {
yyerror("multiple 'overload' "
"table definitions");
YYERROR;
}
if (strlcpy(r.overload_tblname,
o->data.overload.tblname,
PF_TABLE_NAME_SIZE) >=
PF_TABLE_NAME_SIZE) {
yyerror("state option: "
"strlcpy");
YYERROR;
}
r.flush = o->data.overload.flush;
break;
case PF_STATE_OPT_MAX_SRC_CONN:
if (r.max_src_conn) {
yyerror("state option "
"'max-src-conn' "
"multiple definitions");
YYERROR;
}
if (o->data.max_src_conn == 0) {
yyerror("'max-src-conn' "
"must be > 0");
YYERROR;
}
r.max_src_conn =
o->data.max_src_conn;
r.rule_flag |= PFRULE_SRCTRACK |
PFRULE_RULESRCTRACK;
break;
case PF_STATE_OPT_MAX_SRC_CONN_RATE:
if (r.max_src_conn_rate.limit) {
yyerror("state option "
"'max-src-conn-rate' "
"multiple definitions");
YYERROR;
}
if (!o->data.max_src_conn_rate.limit ||
!o->data.max_src_conn_rate.seconds) {
yyerror("'max-src-conn-rate' "
"values must be > 0");
YYERROR;
}
if (o->data.max_src_conn_rate.limit >
PF_THRESHOLD_MAX) {
yyerror("'max-src-conn-rate' "
"maximum rate must be < %u",
PF_THRESHOLD_MAX);
YYERROR;
}
r.max_src_conn_rate.limit =
o->data.max_src_conn_rate.limit;
r.max_src_conn_rate.seconds =
o->data.max_src_conn_rate.seconds;
r.rule_flag |= PFRULE_SRCTRACK |
PFRULE_RULESRCTRACK;
break;
case PF_STATE_OPT_MAX_SRC_NODES:
if (r.max_src_nodes) {
yyerror("state option "
"'max-src-nodes' "
"multiple definitions");
YYERROR;
}
if (o->data.max_src_nodes == 0) {
yyerror("'max-src-nodes' must "
"be > 0");
YYERROR;
}
r.max_src_nodes =
o->data.max_src_nodes;
r.rule_flag |= PFRULE_SRCTRACK |
PFRULE_RULESRCTRACK;
break;
case PF_STATE_OPT_STATELOCK:
if (statelock) {
yyerror("state locking option: "
"multiple definitions");
YYERROR;
}
statelock = 1;
r.rule_flag |= o->data.statelock;
break;
case PF_STATE_OPT_SLOPPY:
if (r.rule_flag & PFRULE_STATESLOPPY) {
yyerror("state sloppy option: "
"multiple definitions");
YYERROR;
}
r.rule_flag |= PFRULE_STATESLOPPY;
break;
case PF_STATE_OPT_PFLOW:
if (r.rule_flag & PFRULE_PFLOW) {
yyerror("state pflow "
"option: multiple "
"definitions");
YYERROR;
}
r.rule_flag |= PFRULE_PFLOW;
break;
case PF_STATE_OPT_TIMEOUT:
if (o->data.timeout.number ==
PFTM_ADAPTIVE_START ||
o->data.timeout.number ==
PFTM_ADAPTIVE_END)
adaptive = 1;
if (r.timeout[o->data.timeout.number]) {
yyerror("state timeout %s "
"multiple definitions",
pf_timeouts[o->data.
timeout.number].name);
YYERROR;
}
r.timeout[o->data.timeout.number] =
o->data.timeout.seconds;
}
o = o->next;
if (!defaults)
free(p);
}
/* 'flags S/SA' by default on stateful rules */
if (!r.action && !r.flags && !r.flagset &&
!$8.fragment && !($8.marker & FOM_FLAGS) &&
r.keep_state) {
r.flags = parse_flags("S");
r.flagset = parse_flags("SA");
}
if (!adaptive && r.max_states) {
r.timeout[PFTM_ADAPTIVE_START] =
(r.max_states / 10) * 6;
r.timeout[PFTM_ADAPTIVE_END] =
(r.max_states / 10) * 12;
}
if (r.rule_flag & PFRULE_SRCTRACK) {
if (srctrack == PF_SRCTRACK_GLOBAL &&
r.max_src_nodes) {
yyerror("'max-src-nodes' is "
"incompatible with "
"'source-track global'");
YYERROR;
}
if (srctrack == PF_SRCTRACK_GLOBAL &&
r.max_src_conn) {
yyerror("'max-src-conn' is "
"incompatible with "
"'source-track global'");
YYERROR;
}
if (srctrack == PF_SRCTRACK_GLOBAL &&
r.max_src_conn_rate.seconds) {
yyerror("'max-src-conn-rate' is "
"incompatible with "
"'source-track global'");
YYERROR;
}
if (r.timeout[PFTM_SRC_NODE] <
r.max_src_conn_rate.seconds)
r.timeout[PFTM_SRC_NODE] =
r.max_src_conn_rate.seconds;
r.rule_flag |= PFRULE_SRCTRACK;
if (srctrack == PF_SRCTRACK_RULE)
r.rule_flag |= PFRULE_RULESRCTRACK;
}
if (r.keep_state && !statelock)
r.rule_flag |= default_statelock;
decide_address_family($7.src.host, &r.af);
decide_address_family($7.dst.host, &r.af);
if ($8.rt) {
if ($8.rt != PF_DUPTO && !r.direction) {
yyerror("direction must be explicit "
"with rules that specify routing");
YYERROR;
}
r.rt = $8.rt;
}
if (expand_divertspec(&r, &$8.divert))
YYERROR;
expand_rule(&r, 0, $4, &$8.nat, &$8.rdr, &$8.rroute, $6,
$7.src_os,
$7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
$8.uid, $8.gid, $8.rcv, $8.icmpspec);
}
;
filter_opts : {
bzero(&filter_opts, sizeof filter_opts);
filter_opts.rtableid = -1;
}
filter_opts_l
{ $$ = filter_opts; }
| /* empty */ {
bzero(&filter_opts, sizeof filter_opts);
filter_opts.rtableid = -1;
$$ = filter_opts;
}
;
filter_opts_l : filter_opts_l filter_opt
| filter_opt
;
filter_opt : USER uids {
if (filter_opts.uid)
$2->tail->next = filter_opts.uid;
filter_opts.uid = $2;
}
| GROUP gids {
if (filter_opts.gid)
$2->tail->next = filter_opts.gid;
filter_opts.gid = $2;
}
| flags {
if (filter_opts.marker & FOM_FLAGS) {
yyerror("flags cannot be redefined");
YYERROR;
}
filter_opts.marker |= FOM_FLAGS;
filter_opts.flags.b1 |= $1.b1;
filter_opts.flags.b2 |= $1.b2;
filter_opts.flags.w |= $1.w;
filter_opts.flags.w2 |= $1.w2;
}
| icmpspec {
if (filter_opts.marker & FOM_ICMP) {
yyerror("icmp-type cannot be redefined");
YYERROR;
}
filter_opts.marker |= FOM_ICMP;
filter_opts.icmpspec = $1;
}
| PRIO NUMBER {
if (filter_opts.marker & FOM_PRIO) {
yyerror("prio cannot be redefined");
YYERROR;
}
if ($2 < 0 || $2 > IFQ_MAXPRIO) {
yyerror("prio must be 0 - %u", IFQ_MAXPRIO);
YYERROR;
}
filter_opts.marker |= FOM_PRIO;
filter_opts.prio = $2;
}
| TOS tos {
if (filter_opts.marker & FOM_TOS) {
yyerror("tos cannot be redefined");
YYERROR;
}
filter_opts.marker |= FOM_TOS;
filter_opts.tos = $2;
}
| keep {
if (filter_opts.marker & FOM_KEEP) {
yyerror("modulate or keep cannot be redefined");
YYERROR;
}
filter_opts.marker |= FOM_KEEP;
filter_opts.keep.action = $1.action;
filter_opts.keep.options = $1.options;
}
| FRAGMENT {
filter_opts.fragment = 1;
}
| ALLOWOPTS {
filter_opts.allowopts = 1;
}
| LABEL label {
if (filter_opts.label) {
yyerror("label cannot be redefined");
YYERROR;
}
filter_opts.label = $2;
}
| QUEUE qname {
if (filter_opts.queues.qname) {
yyerror("queue cannot be redefined");
YYERROR;
}
filter_opts.queues = $2;
}
| TAG string {
filter_opts.tag = $2;
}
| not TAGGED string {
filter_opts.match_tag = $3;
filter_opts.match_tag_not = $1;
}
| PROBABILITY probability {
double p;
p = floor($2 * UINT_MAX + 0.5);
if (p < 0.0 || p > UINT_MAX) {
yyerror("invalid probability: %g%%", $2 * 100);
YYERROR;
}
filter_opts.prob = (u_int32_t)p;
if (filter_opts.prob == 0)
filter_opts.prob = 1;
}
| RTABLE NUMBER {
if ($2 < 0 || $2 > RT_TABLEID_MAX) {
yyerror("invalid rtable id");
YYERROR;
} else if (!lookup_rtable($2)) {
yyerror("rtable %lld does not exist", $2);
YYERROR;
}
filter_opts.rtableid = $2;
}
| DIVERTTO STRING PORT portplain {
if (filter_opts.divert.type != PF_DIVERT_NONE) {
yyerror("more than one divert option");
YYERROR;
}
filter_opts.divert.type = PF_DIVERT_TO;
if ((filter_opts.divert.addr = host($2, pf->opts)) == NULL) {
yyerror("could not parse divert address: %s",
$2);
free($2);
YYERROR;
}
free($2);
filter_opts.divert.port = $4.a;
if (!filter_opts.divert.port) {
yyerror("invalid divert port: %u", ntohs($4.a));
YYERROR;
}
}
| DIVERTREPLY {
if (filter_opts.divert.type != PF_DIVERT_NONE) {
yyerror("more than one divert option");
YYERROR;
}
filter_opts.divert.type = PF_DIVERT_REPLY;
}
| DIVERTPACKET PORT portplain {
if (filter_opts.divert.type != PF_DIVERT_NONE) {
yyerror("more than one divert option");
YYERROR;
}
filter_opts.divert.type = PF_DIVERT_PACKET;
/*
* If IP reassembly was not turned off, also
* forcibly enable TCP reassembly by default.
*/
if (pf->reassemble & PF_REASS_ENABLED)
filter_opts.marker |= FOM_SCRUB_TCP;
filter_opts.divert.port = $3.a;
if (!filter_opts.divert.port) {
yyerror("invalid divert port: %u", ntohs($3.a));
YYERROR;
}
}
| SCRUB '(' scrub_opts ')' {
filter_opts.nodf = $3.nodf;
filter_opts.minttl = $3.minttl;
filter_opts.randomid = $3.randomid;
filter_opts.max_mss = $3.maxmss;
if ($3.reassemble_tcp)
filter_opts.marker |= FOM_SCRUB_TCP;
filter_opts.marker |= $3.marker;
}
| NATTO redirpool pool_opts {
if (filter_opts.nat.rdr) {
yyerror("cannot respecify nat-to/binat-to");
YYERROR;
}
filter_opts.nat.rdr = $2;
memcpy(&filter_opts.nat.pool_opts, &$3,
sizeof(filter_opts.nat.pool_opts));
}
| AFTO af FROM redirpool pool_opts {
if (filter_opts.nat.rdr) {
yyerror("cannot respecify af-to");
YYERROR;
}
if ($2 == 0) {
yyerror("no target address family specified");
YYERROR;
}
filter_opts.nat.af = $2;
filter_opts.nat.rdr = $4;
memcpy(&filter_opts.nat.pool_opts, &$5,
sizeof(filter_opts.nat.pool_opts));
filter_opts.rdr.rdr =
calloc(1, sizeof(struct redirection));
bzero(&filter_opts.rdr.pool_opts,
sizeof(filter_opts.rdr.pool_opts));
filter_opts.marker |= FOM_AFTO;
}
| AFTO af FROM redirpool pool_opts TO redirpool pool_opts {
if (filter_opts.nat.rdr) {
yyerror("cannot respecify af-to");
YYERROR;
}
if ($2 == 0) {
yyerror("no address family specified");
YYERROR;
}
if (($4->host->af && $4->host->af != $2) ||
($7->host->af && $7->host->af != $2)) {
yyerror("af-to addresses must be in the "
"target address family");
YYERROR;
}
filter_opts.nat.af = $2;
filter_opts.nat.rdr = $4;
memcpy(&filter_opts.nat.pool_opts, &$5,
sizeof(filter_opts.nat.pool_opts));
filter_opts.rdr.af = $2;
filter_opts.rdr.rdr = $7;
memcpy(&filter_opts.nat.pool_opts, &$8,
sizeof(filter_opts.nat.pool_opts));
filter_opts.marker |= FOM_AFTO;
}
| RDRTO redirpool pool_opts {
if (filter_opts.rdr.rdr) {
yyerror("cannot respecify rdr-to");
YYERROR;
}
filter_opts.rdr.rdr = $2;
memcpy(&filter_opts.rdr.pool_opts, &$3,
sizeof(filter_opts.rdr.pool_opts));
}
| BINATTO redirpool pool_opts {
if (filter_opts.nat.rdr) {
yyerror("cannot respecify nat-to/binat-to");
YYERROR;
}
filter_opts.nat.rdr = $2;
filter_opts.nat.binat = 1;
memcpy(&filter_opts.nat.pool_opts, &$3,
sizeof(filter_opts.nat.pool_opts));
filter_opts.nat.pool_opts.staticport = 1;
}
| ROUTETO routespec {
filter_opts.rt = PF_ROUTETO;
}
| REPLYTO routespec {
filter_opts.rt = PF_REPLYTO;
}
| DUPTO routespec {
filter_opts.rt = PF_DUPTO;
}
| not RECEIVEDON if_item {
if (filter_opts.rcv) {
yyerror("cannot respecify received-on");
YYERROR;
}
filter_opts.rcv = $3;
filter_opts.rcv->not = $1;
}
| ONCE {
filter_opts.marker |= FOM_ONCE;
}
| MAXPKTRATE NUMBER '/' NUMBER {
if ($2 < 0 || $2 > UINT_MAX ||
$4 < 0 || $4 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
if (filter_opts.pktrate.limit) {
yyerror("cannot respecify max-pkt-rate");
YYERROR;
}
filter_opts.pktrate.limit = $2;
filter_opts.pktrate.seconds = $4;
}
| filter_sets
;
filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; }
| SET filter_set { $$ = filter_opts; }
;
filter_sets_l : filter_sets_l comma filter_set
| filter_set
;
filter_set : prio {
if (filter_opts.marker & FOM_SETPRIO) {
yyerror("prio cannot be redefined");
YYERROR;
}
filter_opts.marker |= FOM_SETPRIO;
filter_opts.set_prio[0] = $1.b1;
filter_opts.set_prio[1] = $1.b2;
}
| QUEUE qname {
if (filter_opts.queues.qname) {
yyerror("queue cannot be redefined");
YYERROR;
}
filter_opts.queues = $2;
}
| TOS tos {
if (filter_opts.marker & FOM_SETTOS) {
yyerror("tos cannot be respecified");
YYERROR;
}
filter_opts.marker |= FOM_SETTOS;
filter_opts.settos = $2;
}
| DELAY NUMBER {
if (filter_opts.delay) {
yyerror("delay cannot be respecified");
YYERROR;
}
if ($2 < 0 || $2 > 0xffff) {
yyerror("illegal delay value %lld (0-%u)", $2,
0xffff);
YYERROR;
}
filter_opts.marker |= FOM_SETDELAY;
filter_opts.delay = $2;
}
;
prio : PRIO NUMBER {
if ($2 < 0 || $2 > IFQ_MAXPRIO) {
yyerror("prio must be 0 - %u", IFQ_MAXPRIO);
YYERROR;
}
$$.b1 = $$.b2 = $2;
}
| PRIO '(' NUMBER comma NUMBER ')' {
if ($3 < 0 || $3 > IFQ_MAXPRIO ||
$5 < 0 || $5 > IFQ_MAXPRIO) {
yyerror("prio must be 0 - %u", IFQ_MAXPRIO);
YYERROR;
}
$$.b1 = $3;
$$.b2 = $5;
}
;
probability : STRING {
char *e;
double p = strtod($1, &e);
if (*e == '%') {
p *= 0.01;
e++;
}
if (*e) {
yyerror("invalid probability: %s", $1);
free($1);
YYERROR;
}
free($1);
$$ = p;
}
| NUMBER {
$$ = (double)$1;
}
;
action : PASS { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
| MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; }
| BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; }
;
blockspec : /* empty */ {
$$.b2 = blockpolicy;
$$.w = returnicmpdefault;
$$.w2 = returnicmp6default;
}
| DROP {
$$.b2 = PFRULE_DROP;
$$.w = 0;
$$.w2 = 0;
}
| RETURNRST {
$$.b2 = PFRULE_RETURNRST;
$$.w = 0;
$$.w2 = 0;
}
| RETURNRST '(' TTL NUMBER ')' {
if ($4 < 0 || $4 > 255) {
yyerror("illegal ttl value %lld", $4);
YYERROR;
}
$$.b2 = PFRULE_RETURNRST;
$$.w = $4;
$$.w2 = 0;
}
| RETURNICMP {
$$.b2 = PFRULE_RETURNICMP;
$$.w = returnicmpdefault;
$$.w2 = returnicmp6default;
}
| RETURNICMP6 {
$$.b2 = PFRULE_RETURNICMP;
$$.w = returnicmpdefault;
$$.w2 = returnicmp6default;
}
| RETURNICMP '(' reticmpspec ')' {
$$.b2 = PFRULE_RETURNICMP;
$$.w = $3;
$$.w2 = returnicmpdefault;
}
| RETURNICMP6 '(' reticmp6spec ')' {
$$.b2 = PFRULE_RETURNICMP;
$$.w = returnicmpdefault;
$$.w2 = $3;
}
| RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
$$.b2 = PFRULE_RETURNICMP;
$$.w = $3;
$$.w2 = $5;
}
| RETURN {
$$.b2 = PFRULE_RETURN;
$$.w = returnicmpdefault;
$$.w2 = returnicmp6default;
}
;
reticmpspec : STRING {
if (!($$ = parseicmpspec($1, AF_INET))) {
free($1);
YYERROR;
}
free($1);
}
| NUMBER {
u_int8_t icmptype;
if ($1 < 0 || $1 > 255) {
yyerror("invalid icmp code %lld", $1);
YYERROR;
}
icmptype = returnicmpdefault >> 8;
$$ = (icmptype << 8 | $1);
}
;
reticmp6spec : STRING {
if (!($$ = parseicmpspec($1, AF_INET6))) {
free($1);
YYERROR;
}
free($1);
}
| NUMBER {
u_int8_t icmptype;
if ($1 < 0 || $1 > 255) {
yyerror("invalid icmp code %lld", $1);
YYERROR;
}
icmptype = returnicmp6default >> 8;
$$ = (icmptype << 8 | $1);
}
;
dir : /* empty */ { $$ = PF_INOUT; }
| IN { $$ = PF_IN; }
| OUT { $$ = PF_OUT; }
;
quick : /* empty */ { $$.quick = 0; }
| QUICK { $$.quick = 1; }
;
logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; }
| log { $$ = $1; $$.quick = 0; }
| QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; }
| log QUICK { $$ = $1; $$.quick = 1; }
| QUICK log { $$ = $2; $$.quick = 1; }
;
log : LOG { $$.log = PF_LOG; $$.logif = 0; }
| LOG '(' logopts ')' {
$$.log = PF_LOG | $3.log;
$$.logif = $3.logif;
}
;
logopts : logopt { $$ = $1; }
| logopts comma logopt {
$$.log = $1.log | $3.log;
$$.logif = $3.logif;
if ($$.logif == 0)
$$.logif = $1.logif;
}
;
logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; }
| MATCHES { $$.log = PF_LOG_MATCHES; $$.logif = 0; }
| USER { $$.log = PF_LOG_USER; $$.logif = 0; }
| TO string {
const char *errstr;
u_int i;
$$.log = 0;
if (strncmp($2, "pflog", 5)) {
yyerror("%s: should be a pflog interface", $2);
free($2);
YYERROR;
}
i = strtonum($2 + 5, 0, 255, &errstr);
if (errstr) {
yyerror("%s: %s", $2, errstr);
free($2);
YYERROR;
}
free($2);
$$.logif = i;
}
;
interface : /* empty */ { $$ = NULL; }
| ON if_item_not { $$ = $2; }
| ON '{' optnl if_list '}' { $$ = $4; }
;
if_list : if_item_not optnl { $$ = $1; }
| if_list comma if_item_not optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
if_item_not : not if_item { $$ = $2; $$->not = $1; }
;
if_item : STRING {
struct node_host *n;
$$ = calloc(1, sizeof(struct node_if));
if ($$ == NULL)
err(1, "if_item: calloc");
if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
sizeof($$->ifname)) {
free($1);
free($$);
yyerror("interface name too long");
YYERROR;
}
if ((n = ifa_exists($1)) != NULL)
$$->ifa_flags = n->ifa_flags;
free($1);
$$->not = 0;
$$->next = NULL;
$$->tail = $$;
}
| ANY {
$$ = calloc(1, sizeof(struct node_if));
if ($$ == NULL)
err(1, "if_item: calloc");
strlcpy($$->ifname, "any", sizeof($$->ifname));
$$->not = 0;
$$->next = NULL;
$$->tail = $$;
}
| RDOMAIN NUMBER {
if ($2 < 0 || $2 > RT_TABLEID_MAX)
yyerror("rdomain %lld outside range", $2);
$$ = calloc(1, sizeof(struct node_if));
if ($$ == NULL)
err(1, "if_item: calloc");
$$->not = 0;
$$->use_rdomain = 1;
$$->rdomain = $2;
$$->next = NULL;
$$->tail = $$;
}
;
af : /* empty */ { $$ = 0; }
| INET { $$ = AF_INET; }
| INET6 { $$ = AF_INET6; }
;
proto : /* empty */ { $$ = NULL; }
| PROTO proto_item { $$ = $2; }
| PROTO '{' optnl proto_list '}' { $$ = $4; }
;
proto_list : proto_item optnl { $$ = $1; }
| proto_list comma proto_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
proto_item : protoval {
u_int8_t pr;
pr = (u_int8_t)$1;
if (pr == 0) {
yyerror("proto 0 cannot be used");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_proto));
if ($$ == NULL)
err(1, "proto_item: calloc");
$$->proto = pr;
$$->next = NULL;
$$->tail = $$;
}
;
protoval : STRING {
struct protoent *p;
p = getprotobyname($1);
if (p == NULL) {
yyerror("unknown protocol %s", $1);
free($1);
YYERROR;
}
$$ = p->p_proto;
free($1);
}
| NUMBER {
if ($1 < 0 || $1 > 255) {
yyerror("protocol outside range");
YYERROR;
}
}
;
fromto : ALL {
$$.src.host = NULL;
$$.src.port = NULL;
$$.dst.host = NULL;
$$.dst.port = NULL;
$$.src_os = NULL;
}
| from os to {
$$.src = $1;
$$.src_os = $2;
$$.dst = $3;
}
;
os : /* empty */ { $$ = NULL; }
| OS xos { $$ = $2; }
| OS '{' optnl os_list '}' { $$ = $4; }
;
xos : STRING {
$$ = calloc(1, sizeof(struct node_os));
if ($$ == NULL)
err(1, "os: calloc");
$$->os = $1;
$$->tail = $$;
}
;
os_list : xos optnl { $$ = $1; }
| os_list comma xos optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
from : /* empty */ {
$$.host = NULL;
$$.port = NULL;
}
| FROM ipportspec {
$$ = $2;
}
;
to : /* empty */ {
$$.host = NULL;
$$.port = NULL;
}
| TO ipportspec {
if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
"not permitted in a destination address"))
YYERROR;
$$ = $2;
}
;
ipportspec : ipspec {
$$.host = $1;
$$.port = NULL;
}
| ipspec PORT portspec {
$$.host = $1;
$$.port = $3;
}
| PORT portspec {
$$.host = NULL;
$$.port = $2;
}
;
optnl : '\n' optnl
| /* empty */
;
ipspec : ANY { $$ = NULL; }
| xhost { $$ = $1; }
| '{' optnl host_list '}' { $$ = $3; }
;
host_list : ipspec optnl { $$ = $1; }
| host_list comma ipspec optnl {
if ($1 == NULL) {
freehostlist($3);
$$ = $1;
} else if ($3 == NULL) {
freehostlist($1);
$$ = $3;
} else {
$1->tail->next = $3;
$1->tail = $3->tail;
$$ = $1;
}
}
;
xhost : not host {
struct node_host *n;
for (n = $2; n != NULL; n = n->next)
n->not = $1;
$$ = $2;
}
| not NOROUTE {
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "xhost: calloc");
$$->addr.type = PF_ADDR_NOROUTE;
$$->next = NULL;
$$->not = $1;
$$->tail = $$;
}
| not URPFFAILED {
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "xhost: calloc");
$$->addr.type = PF_ADDR_URPFFAILED;
$$->next = NULL;
$$->not = $1;
$$->tail = $$;
}
;
optweight : WEIGHT NUMBER {
if ($2 < 1 || $2 > USHRT_MAX) {
yyerror("weight out of range");
YYERROR;
}
$$ = $2;
}
| /* empty */ { $$ = 0; }
;
host : STRING {
if (($$ = host($1, pf->opts)) == NULL) {
/* error. "any" is handled elsewhere */
free($1);
yyerror("could not parse host specification");
YYERROR;
}
free($1);
}
| STRING '-' STRING {
struct node_host *b, *e;
if ((b = host($1, pf->opts)) == NULL ||
(e = host($3, pf->opts)) == NULL) {
free($1);
free($3);
yyerror("could not parse host specification");
YYERROR;
}
if (b->af != e->af ||
b->addr.type != PF_ADDR_ADDRMASK ||
e->addr.type != PF_ADDR_ADDRMASK ||
unmask(&b->addr.v.a.mask) !=
(b->af == AF_INET ? 32 : 128) ||
unmask(&e->addr.v.a.mask) !=
(e->af == AF_INET ? 32 : 128) ||
b->next != NULL || b->not ||
e->next != NULL || e->not) {
free(b);
free(e);
free($1);
free($3);
yyerror("invalid address range");
YYERROR;
}
memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
sizeof(b->addr.v.a.mask));
b->addr.type = PF_ADDR_RANGE;
$$ = b;
free(e);
free($1);
free($3);
}
| STRING '/' NUMBER {
char *buf;
if (asprintf(&buf, "%s/%lld", $1, $3) == -1)
err(1, "host: asprintf");
free($1);
if (($$ = host(buf, pf->opts)) == NULL) {
/* error. "any" is handled elsewhere */
free(buf);
yyerror("could not parse host specification");
YYERROR;
}
free(buf);
}
| NUMBER '/' NUMBER {
char *buf;
/* ie. for 10/8 parsing */
if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
err(1, "host: asprintf");
if (($$ = host(buf, pf->opts)) == NULL) {
/* error. "any" is handled elsewhere */
free(buf);
yyerror("could not parse host specification");
YYERROR;
}
free(buf);
}
| dynaddr
| dynaddr '/' NUMBER {
struct node_host *n;
if ($3 < 0 || $3 > 128) {
yyerror("bit number too big");
YYERROR;
}
$$ = $1;
for (n = $1; n != NULL; n = n->next)
set_ipmask(n, $3);
}
| '<' STRING '>' {
if (strlen($2) >= PF_TABLE_NAME_SIZE) {
yyerror("table name '%s' too long", $2);
free($2);
YYERROR;
}
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "host: calloc");
$$->addr.type = PF_ADDR_TABLE;
if (strlcpy($$->addr.v.tblname, $2,
sizeof($$->addr.v.tblname)) >=
sizeof($$->addr.v.tblname))
errx(1, "host: strlcpy");
free($2);
$$->next = NULL;
$$->tail = $$;
}
| ROUTE STRING {
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL) {
free($2);
err(1, "host: calloc");
}
$$->addr.type = PF_ADDR_RTLABEL;
if (strlcpy($$->addr.v.rtlabelname, $2,
sizeof($$->addr.v.rtlabelname)) >=
sizeof($$->addr.v.rtlabelname)) {
yyerror("route label too long, max %zu chars",
sizeof($$->addr.v.rtlabelname) - 1);
free($2);
free($$);
YYERROR;
}
$$->next = NULL;
$$->tail = $$;
free($2);
}
;
number : NUMBER
| STRING {
u_long ulval;
if (atoul($1, &ulval) == -1) {
yyerror("%s is not a number", $1);
free($1);
YYERROR;
} else
$$ = ulval;
free($1);
}
;
dynaddr : '(' STRING ')' {
int flags = 0;
char *p, *op;
op = $2;
if (!isalpha((unsigned char)op[0])) {
yyerror("invalid interface name '%s'", op);
free(op);
YYERROR;
}
while ((p = strrchr($2, ':')) != NULL) {
if (!strcmp(p+1, "network"))
flags |= PFI_AFLAG_NETWORK;
else if (!strcmp(p+1, "broadcast"))
flags |= PFI_AFLAG_BROADCAST;
else if (!strcmp(p+1, "peer"))
flags |= PFI_AFLAG_PEER;
else if (!strcmp(p+1, "0"))
flags |= PFI_AFLAG_NOALIAS;
else {
yyerror("interface %s has bad modifier",
$2);
free(op);
YYERROR;
}
*p = '\0';
}
if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
free(op);
yyerror("illegal combination of "
"interface modifiers");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_host));
if ($$ == NULL)
err(1, "address: calloc");
$$->af = 0;
set_ipmask($$, 128);
$$->addr.type = PF_ADDR_DYNIFTL;
$$->addr.iflags = flags;
if (strlcpy($$->addr.v.ifname, $2,
sizeof($$->addr.v.ifname)) >=
sizeof($$->addr.v.ifname)) {
free(op);
free($$);
yyerror("interface name too long");
YYERROR;
}
free(op);
$$->next = NULL;
$$->tail = $$;
}
;
portspec : port_item { $$ = $1; }
| '{' optnl port_list '}' { $$ = $3; }
;
port_list : port_item optnl { $$ = $1; }
| port_list comma port_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
port_item : portrange {
$$ = calloc(1, sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: calloc");
$$->port[0] = $1.a;
$$->port[1] = $1.b;
if ($1.t) {
$$->op = PF_OP_RRG;
if (validate_range($$->op, $$->port[0],
$$->port[1])) {
yyerror("invalid port range");
YYERROR;
}
} else
$$->op = PF_OP_EQ;
$$->next = NULL;
$$->tail = $$;
}
| unaryop portrange {
if ($2.t) {
yyerror("':' cannot be used with an other "
"port operator");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: calloc");
$$->port[0] = $2.a;
$$->port[1] = $2.b;
$$->op = $1;
$$->next = NULL;
$$->tail = $$;
}
| portrange PORTBINARY portrange {
if ($1.t || $3.t) {
yyerror("':' cannot be used with an other "
"port operator");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_port));
if ($$ == NULL)
err(1, "port_item: calloc");
$$->port[0] = $1.a;
$$->port[1] = $3.a;
$$->op = $2;
if (validate_range($$->op, $$->port[0], $$->port[1])) {
yyerror("invalid port range");
YYERROR;
}
$$->next = NULL;
$$->tail = $$;
}
;
portplain : numberstring {
if (parseport($1, &$$, 0) == -1) {
free($1);
YYERROR;
}
free($1);
}
;
portrange : numberstring {
if (parseport($1, &$$, PPORT_RANGE) == -1) {
free($1);
YYERROR;
}
free($1);
}
;
uids : uid_item { $$ = $1; }
| '{' optnl uid_list '}' { $$ = $3; }
;
uid_list : uid_item optnl { $$ = $1; }
| uid_list comma uid_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
uid_item : uid {
$$ = calloc(1, sizeof(struct node_uid));
if ($$ == NULL)
err(1, "uid_item: calloc");
$$->uid[0] = $1;
$$->uid[1] = $1;
$$->op = PF_OP_EQ;
$$->next = NULL;
$$->tail = $$;
}
| unaryop uid {
if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
yyerror("user unknown requires operator = or "
"!=");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_uid));
if ($$ == NULL)
err(1, "uid_item: calloc");
$$->uid[0] = $2;
$$->uid[1] = $2;
$$->op = $1;
$$->next = NULL;
$$->tail = $$;
}
| uid PORTBINARY uid {
if ($1 == -1 || $3 == -1) {
yyerror("user unknown requires operator = or "
"!=");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_uid));
if ($$ == NULL)
err(1, "uid_item: calloc");
$$->uid[0] = $1;
$$->uid[1] = $3;
$$->op = $2;
$$->next = NULL;
$$->tail = $$;
}
;
uid : STRING {
if (!strcmp($1, "unknown"))
$$ = -1;
else {
uid_t uid;
if (uid_from_user($1, &uid) == -1) {
yyerror("unknown user %s", $1);
free($1);
YYERROR;
}
$$ = uid;
}
free($1);
}
| NUMBER {
if ($1 < 0 || $1 >= UID_MAX) {
yyerror("illegal uid value %lld", $1);
YYERROR;
}
$$ = $1;
}
;
gids : gid_item { $$ = $1; }
| '{' optnl gid_list '}' { $$ = $3; }
;
gid_list : gid_item optnl { $$ = $1; }
| gid_list comma gid_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
gid_item : gid {
$$ = calloc(1, sizeof(struct node_gid));
if ($$ == NULL)
err(1, "gid_item: calloc");
$$->gid[0] = $1;
$$->gid[1] = $1;
$$->op = PF_OP_EQ;
$$->next = NULL;
$$->tail = $$;
}
| unaryop gid {
if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
yyerror("group unknown requires operator = or "
"!=");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_gid));
if ($$ == NULL)
err(1, "gid_item: calloc");
$$->gid[0] = $2;
$$->gid[1] = $2;
$$->op = $1;
$$->next = NULL;
$$->tail = $$;
}
| gid PORTBINARY gid {
if ($1 == -1 || $3 == -1) {
yyerror("group unknown requires operator = or "
"!=");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_gid));
if ($$ == NULL)
err(1, "gid_item: calloc");
$$->gid[0] = $1;
$$->gid[1] = $3;
$$->op = $2;
$$->next = NULL;
$$->tail = $$;
}
;
gid : STRING {
if (!strcmp($1, "unknown"))
$$ = -1;
else {
gid_t gid;
if (gid_from_group($1, &gid) == -1) {
yyerror("unknown group %s", $1);
free($1);
YYERROR;
}
$$ = gid;
}
free($1);
}
| NUMBER {
if ($1 < 0 || $1 >= GID_MAX) {
yyerror("illegal gid value %lld", $1);
YYERROR;
}
$$ = $1;
}
;
flag : STRING {
int f;
if ((f = parse_flags($1)) < 0) {
yyerror("bad flags %s", $1);
free($1);
YYERROR;
}
free($1);
$$.b1 = f;
}
;
flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; }
| FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; }
| FLAGS ANY { $$.b1 = 0; $$.b2 = 0; }
;
icmpspec : ICMPTYPE icmp_item { $$ = $2; }
| ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; }
| ICMP6TYPE icmp6_item { $$ = $2; }
| ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; }
;
icmp_list : icmp_item optnl { $$ = $1; }
| icmp_list comma icmp_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
icmp6_list : icmp6_item optnl { $$ = $1; }
| icmp6_list comma icmp6_item optnl {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
icmp_item : icmptype {
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = 0;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
$$->tail = $$;
}
| icmptype CODE STRING {
const struct icmpcodeent *p;
if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
yyerror("unknown icmp-code %s", $3);
free($3);
YYERROR;
}
free($3);
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = p->code + 1;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
$$->tail = $$;
}
| icmptype CODE NUMBER {
if ($3 < 0 || $3 > 255) {
yyerror("illegal icmp-code %lld", $3);
YYERROR;
}
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = $3 + 1;
$$->proto = IPPROTO_ICMP;
$$->next = NULL;
$$->tail = $$;
}
;
icmp6_item : icmp6type {
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = 0;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
$$->tail = $$;
}
| icmp6type CODE STRING {
const struct icmpcodeent *p;
if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
yyerror("unknown icmp6-code %s", $3);
free($3);
YYERROR;
}
free($3);
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = p->code + 1;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
$$->tail = $$;
}
| icmp6type CODE NUMBER {
if ($3 < 0 || $3 > 255) {
yyerror("illegal icmp-code %lld", $3);
YYERROR;
}
$$ = calloc(1, sizeof(struct node_icmp));
if ($$ == NULL)
err(1, "icmp_item: calloc");
$$->type = $1;
$$->code = $3 + 1;
$$->proto = IPPROTO_ICMPV6;
$$->next = NULL;
$$->tail = $$;
}
;
icmptype : STRING {
const struct icmptypeent *p;
if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
yyerror("unknown icmp-type %s", $1);
free($1);
YYERROR;
}
$$ = p->type + 1;
free($1);
}
| NUMBER {
if ($1 < 0 || $1 > 255) {
yyerror("illegal icmp-type %lld", $1);
YYERROR;
}
$$ = $1 + 1;
}
;
icmp6type : STRING {
const struct icmptypeent *p;
if ((p = geticmptypebyname($1, AF_INET6)) ==
NULL) {
yyerror("unknown icmp6-type %s", $1);
free($1);
YYERROR;
}
$$ = p->type + 1;
free($1);
}
| NUMBER {
if ($1 < 0 || $1 > 255) {
yyerror("illegal icmp6-type %lld", $1);
YYERROR;
}
$$ = $1 + 1;
}
;
tos : STRING {
int val;
char *end;
if (map_tos($1, &val))
$$ = val;
else if ($1[0] == '0' && $1[1] == 'x') {
errno = 0;
$$ = strtoul($1, &end, 16);
if (errno || *end != '\0')
$$ = 256;
} else
$$ = 256; /* flag bad argument */
if ($$ < 0 || $$ > 255) {
yyerror("illegal tos value %s", $1);
free($1);
YYERROR;
}
free($1);
}
| NUMBER {
$$ = $1;
if ($$ < 0 || $$ > 255) {
yyerror("illegal tos value %lld", $1);
YYERROR;
}
}
;
sourcetrack : /* empty */ { $$ = PF_SRCTRACK; }
| GLOBAL { $$ = PF_SRCTRACK_GLOBAL; }
| RULE { $$ = PF_SRCTRACK_RULE; }
;
statelock : IFBOUND {
$$ = PFRULE_IFBOUND;
}
| FLOATING {
$$ = 0;
}
;
keep : NO STATE {
$$.action = 0;
$$.options = NULL;
}
| KEEP STATE state_opt_spec {
$$.action = PF_STATE_NORMAL;
$$.options = $3;
}
| MODULATE STATE state_opt_spec {
$$.action = PF_STATE_MODULATE;
$$.options = $3;
}
| SYNPROXY STATE state_opt_spec {
$$.action = PF_STATE_SYNPROXY;
$$.options = $3;
}
;
flush : /* empty */ { $$ = 0; }
| FLUSH { $$ = PF_FLUSH; }
| FLUSH GLOBAL {
$$ = PF_FLUSH | PF_FLUSH_GLOBAL;
}
;
state_opt_spec : '(' state_opt_list ')' { $$ = $2; }
| /* empty */ { $$ = NULL; }
;
state_opt_list : state_opt_item { $$ = $1; }
| state_opt_list comma state_opt_item {
$1->tail->next = $3;
$1->tail = $3;
$$ = $1;
}
;
state_opt_item : MAXIMUM NUMBER {
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_MAX;
$$->data.max_states = $2;
$$->next = NULL;
$$->tail = $$;
}
| NOSYNC {
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_NOSYNC;
$$->next = NULL;
$$->tail = $$;
}
| MAXSRCSTATES NUMBER {
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_MAX_SRC_STATES;
$$->data.max_src_states = $2;
$$->next = NULL;
$$->tail = $$;
}
| MAXSRCCONN NUMBER {
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_MAX_SRC_CONN;
$$->data.max_src_conn = $2;
$$->next = NULL;
$$->tail = $$;
}
| MAXSRCCONNRATE NUMBER '/' NUMBER {
if ($2 < 0 || $2 > UINT_MAX ||
$4 < 0 || $4 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
$$->data.max_src_conn_rate.limit = $2;
$$->data.max_src_conn_rate.seconds = $4;
$$->next = NULL;
$$->tail = $$;
}
| OVERLOAD '<' STRING '>' flush {
if (strlen($3) >= PF_TABLE_NAME_SIZE) {
yyerror("table name '%s' too long", $3);
free($3);
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
if (strlcpy($$->data.overload.tblname, $3,
PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
errx(1, "state_opt_item: strlcpy");
free($3);
$$->type = PF_STATE_OPT_OVERLOAD;
$$->data.overload.flush = $5;
$$->next = NULL;
$$->tail = $$;
}
| MAXSRCNODES NUMBER {
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_MAX_SRC_NODES;
$$->data.max_src_nodes = $2;
$$->next = NULL;
$$->tail = $$;
}
| SOURCETRACK sourcetrack {
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_SRCTRACK;
$$->data.src_track = $2;
$$->next = NULL;
$$->tail = $$;
}
| statelock {
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_STATELOCK;
$$->data.statelock = $1;
$$->next = NULL;
$$->tail = $$;
}
| SLOPPY {
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_SLOPPY;
$$->next = NULL;
$$->tail = $$;
}
| PFLOW {
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_PFLOW;
$$->next = NULL;
$$->tail = $$;
}
| STRING NUMBER {
int i;
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
for (i = 0; pf_timeouts[i].name &&
strcmp(pf_timeouts[i].name, $1); ++i)
; /* nothing */
if (!pf_timeouts[i].name) {
yyerror("illegal timeout name %s", $1);
free($1);
YYERROR;
}
if (strchr(pf_timeouts[i].name, '.') == NULL) {
yyerror("illegal state timeout %s", $1);
free($1);
YYERROR;
}
free($1);
$$ = calloc(1, sizeof(struct node_state_opt));
if ($$ == NULL)
err(1, "state_opt_item: calloc");
$$->type = PF_STATE_OPT_TIMEOUT;
$$->data.timeout.number = pf_timeouts[i].timeout;
$$->data.timeout.seconds = $2;
$$->next = NULL;
$$->tail = $$;
}
;
label : STRING {
$$ = $1;
}
;
qname : STRING {
struct pfctl_qsitem *qsi;
if ((qsi = pfctl_find_queue($1, &qspecs)) == NULL) {
yyerror("queue %s is not defined", $1);
YYERROR;
}
$$.qname = $1;
$$.pqname = NULL;
}
| '(' STRING ')' {
struct pfctl_qsitem *qsi;
if ((qsi = pfctl_find_queue($2, &qspecs)) == NULL) {
yyerror("queue %s is not defined", $2);
YYERROR;
}
$$.qname = $2;
$$.pqname = NULL;
}
| '(' STRING comma STRING ')' {
struct pfctl_qsitem *qsi, *pqsi;
if ((qsi = pfctl_find_queue($2, &qspecs)) == NULL) {
yyerror("queue %s is not defined", $2);
YYERROR;
}
if ((pqsi = pfctl_find_queue($4, &qspecs)) == NULL) {
yyerror("queue %s is not defined", $4);
YYERROR;
}
$$.qname = $2;
$$.pqname = $4;
}
;
portstar : numberstring {
if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
free($1);
YYERROR;
}
free($1);
}
;
redirspec : host optweight {
if ($2 > 0) {
struct node_host *n;
for (n = $1; n != NULL; n = n->next)
n->weight = $2;
}
$$ = $1;
}
| '{' optnl redir_host_list '}' { $$ = $3; }
;
redir_host_list : host optweight optnl {
if ($1->addr.type != PF_ADDR_ADDRMASK) {
free($1);
yyerror("only addresses can be listed for "
"redirection pools ");
YYERROR;
}
if ($2 > 0) {
struct node_host *n;
for (n = $1; n != NULL; n = n->next)
n->weight = $2;
}
$$ = $1;
}
| redir_host_list comma host optweight optnl {
$1->tail->next = $3;
$1->tail = $3->tail;
if ($4 > 0) {
struct node_host *n;
for (n = $3; n != NULL; n = n->next)
n->weight = $4;
}
$$ = $1;
}
;
redirpool : redirspec {
$$ = calloc(1, sizeof(struct redirection));
if ($$ == NULL)
err(1, "redirection: calloc");
$$->host = $1;
$$->rport.a = $$->rport.b = $$->rport.t = 0;
}
| redirspec PORT portstar {
$$ = calloc(1, sizeof(struct redirection));
if ($$ == NULL)
err(1, "redirection: calloc");
$$->host = $1;
$$->rport = $3;
}
;
hashkey : /* empty */
{
$$ = calloc(1, sizeof(struct pf_poolhashkey));
if ($$ == NULL)
err(1, "hashkey: calloc");
$$->key32[0] = arc4random();
$$->key32[1] = arc4random();
$$->key32[2] = arc4random();
$$->key32[3] = arc4random();
}
| string
{
if (!strncmp($1, "0x", 2)) {
if (strlen($1) != 34) {
free($1);
yyerror("hex key must be 128 bits "
"(32 hex digits) long");
YYERROR;
}
$$ = calloc(1, sizeof(struct pf_poolhashkey));
if ($$ == NULL)
err(1, "hashkey: calloc");
if (sscanf($1, "0x%8x%8x%8x%8x",
&$$->key32[0], &$$->key32[1],
&$$->key32[2], &$$->key32[3]) != 4) {
free($$);
free($1);
yyerror("invalid hex key");
YYERROR;
}
} else {
MD5_CTX context;
$$ = calloc(1, sizeof(struct pf_poolhashkey));
if ($$ == NULL)
err(1, "hashkey: calloc");
MD5Init(&context);
MD5Update(&context, (unsigned char *)$1,
strlen($1));
MD5Final((unsigned char *)$$, &context);
HTONL($$->key32[0]);
HTONL($$->key32[1]);
HTONL($$->key32[2]);
HTONL($$->key32[3]);
}
free($1);
}
;
pool_opts : { bzero(&pool_opts, sizeof pool_opts); }
pool_opts_l
{ $$ = pool_opts; }
| /* empty */ {
bzero(&pool_opts, sizeof pool_opts);
$$ = pool_opts;
}
;
pool_opts_l : pool_opts_l pool_opt
| pool_opt
;
pool_opt : BITMASK {
if (pool_opts.type) {
yyerror("pool type cannot be redefined");
YYERROR;
}
pool_opts.type = PF_POOL_BITMASK;
}
| RANDOM {
if (pool_opts.type) {
yyerror("pool type cannot be redefined");
YYERROR;
}
pool_opts.type = PF_POOL_RANDOM;
}
| SOURCEHASH hashkey {
if (pool_opts.type) {
yyerror("pool type cannot be redefined");
YYERROR;
}
pool_opts.type = PF_POOL_SRCHASH;
pool_opts.key = $2;
}
| ROUNDROBIN {
if (pool_opts.type) {
yyerror("pool type cannot be redefined");
YYERROR;
}
pool_opts.type = PF_POOL_ROUNDROBIN;
}
| LEASTSTATES {
if (pool_opts.type) {
yyerror("pool type cannot be redefined");
YYERROR;
}
pool_opts.type = PF_POOL_LEASTSTATES;
}
| STATICPORT {
if (pool_opts.staticport) {
yyerror("static-port cannot be redefined");
YYERROR;
}
pool_opts.staticport = 1;
}
| STICKYADDRESS {
if (pool_opts.marker & POM_STICKYADDRESS) {
yyerror("sticky-address cannot be redefined");
YYERROR;
}
pool_opts.marker |= POM_STICKYADDRESS;
pool_opts.opts |= PF_POOL_STICKYADDR;
}
;
routespec : redirspec pool_opts {
struct redirection *redir;
if (filter_opts.rt != PF_NOPFROUTE) {
yyerror("cannot respecify "
"route-to/reply-to/dup-to");
YYERROR;
}
redir = calloc(1, sizeof(*redir));
if (redir == NULL)
err(1, "routespec calloc");
redir->host = $1;
filter_opts.rroute.rdr = redir;
memcpy(&filter_opts.rroute.pool_opts, &$2,
sizeof(filter_opts.rroute.pool_opts));
}
;
timeout_spec : STRING NUMBER
{
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
yyerror("unknown timeout %s", $1);
free($1);
YYERROR;
}
free($1);
}
;
timeout_list : timeout_list comma timeout_spec optnl
| timeout_spec optnl
;
limit_spec : STRING NUMBER
{
if ($2 < 0 || $2 > UINT_MAX) {
yyerror("only positive values permitted");
YYERROR;
}
if (pfctl_set_limit(pf, $1, $2) != 0) {
yyerror("unable to set limit %s %lld", $1, $2);
free($1);
YYERROR;
}
free($1);
}
;
limit_list : limit_list comma limit_spec optnl
| limit_spec optnl
;
comma : ','
| /* empty */
;
yesno : NO { $$ = 0; }
| STRING {
if (!strcmp($1, "yes"))
$$ = 1;
else {
yyerror("invalid value '%s', expected 'yes' "
"or 'no'", $1);
free($1);
YYERROR;
}
free($1);
}
;
unaryop : '=' { $$ = PF_OP_EQ; }
| NE { $$ = PF_OP_NE; }
| LE { $$ = PF_OP_LE; }
| '<' { $$ = PF_OP_LT; }
| GE { $$ = PF_OP_GE; }
| '>' { $$ = PF_OP_GT; }
;
%%
int
yyerror(const char *fmt, ...)
{
va_list ap;
file->errors++;
va_start(ap, fmt);
fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
return (0);
}
int
validate_range(u_int8_t op, u_int16_t p1, u_int16_t p2)
{
u_int16_t a = ntohs(p1);
u_int16_t b = ntohs(p2);
if ((op == PF_OP_RRG && a > b) || /* 34:12, i.e. none */
(op == PF_OP_IRG && a >= b) || /* 34><12, i.e. none */
(op == PF_OP_XRG && a > b)) /* 34<>22, i.e. all */
return 1;
return 0;
}
int
disallow_table(struct node_host *h, const char *fmt)
{
for (; h != NULL; h = h->next)
if (h->addr.type == PF_ADDR_TABLE) {
yyerror(fmt, h->addr.v.tblname);
return (1);
}
return (0);
}
int
disallow_urpf_failed(struct node_host *h, const char *fmt)
{
for (; h != NULL; h = h->next)
if (h->addr.type == PF_ADDR_URPFFAILED) {
yyerror("%s", fmt);
return (1);
}
return (0);
}
int
disallow_alias(struct node_host *h, const char *fmt)
{
for (; h != NULL; h = h->next)
if (DYNIF_MULTIADDR(h->addr)) {
yyerror(fmt, h->addr.v.tblname);
return (1);
}
return (0);
}
int
rule_consistent(struct pf_rule *r)
{
int problems = 0;
if (r->proto != IPPROTO_TCP && r->os_fingerprint != PF_OSFP_ANY) {
yyerror("os only applies to tcp");
problems++;
}
if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
(r->src.port_op || r->dst.port_op)) {
yyerror("port only applies to tcp/udp");
problems++;
}
if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
r->uid.op) {
yyerror("user only applies to tcp/udp");
problems++;
}
if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
r->gid.op) {
yyerror("group only applies to tcp/udp");
problems++;
}
if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
(r->type || r->code)) {
yyerror("icmp-type/code only applies to icmp");
problems++;
}
if (!r->af && (r->type || r->code)) {
yyerror("must indicate address family with icmp-type/code");
problems++;
}
if (r->rule_flag & PFRULE_AFTO && r->af == r->naf) {
yyerror("must indicate different address family with af-to");
problems++;
}
if (r->overload_tblname[0] &&
r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
yyerror("'overload' requires 'max-src-conn' "
"or 'max-src-conn-rate'");
problems++;
}
if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
(r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
yyerror("proto %s doesn't match address family %s",
r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
r->af == AF_INET ? "inet" : "inet6");
problems++;
}
if (r->allow_opts && r->action != PF_PASS) {
yyerror("allow-opts can only be specified for pass rules");
problems++;
}
if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
r->dst.port_op || r->flagset || r->type || r->code)) {
yyerror("fragments can be filtered only on IP header fields");
problems++;
}
if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
yyerror("return-rst can only be applied to TCP rules");
problems++;
}
if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
yyerror("max-src-nodes requires 'source-track rule'");
problems++;
}
if (r->action != PF_PASS && r->keep_state) {
yyerror("keep state is great, but only for pass rules");
problems++;
}
if (r->rt && !r->keep_state) {
yyerror("route-to, reply-to and dup-to require keep state");
problems++;
}
if (r->rule_flag & PFRULE_STATESLOPPY &&
(r->keep_state == PF_STATE_MODULATE ||
r->keep_state == PF_STATE_SYNPROXY)) {
yyerror("sloppy state matching cannot be used with "
"synproxy state or modulate state");
problems++;
}
if ((r->keep_state == PF_STATE_SYNPROXY) && (r->direction != PF_IN))
fprintf(stderr, "%s:%d: warning: "
"synproxy used for inbound rules only, "
"ignored for outbound\n", file->name, yylval.lineno);
if ((r->nat.addr.type != PF_ADDR_NONE ||
r->rdr.addr.type != PF_ADDR_NONE) &&
r->action != PF_MATCH && !r->keep_state) {
yyerror("nat-to and rdr-to require keep state");
problems++;
}
if (r->direction == PF_INOUT && (r->nat.addr.type != PF_ADDR_NONE ||
r->rdr.addr.type != PF_ADDR_NONE)) {
yyerror("nat-to and rdr-to require a direction");
problems++;
}
if (r->af == AF_INET6 && (r->scrub_flags &
(PFSTATE_NODF|PFSTATE_RANDOMID))) {
yyerror("address family inet6 does not support scrub options "
"no-df, random-id");
problems++;
}
/* Basic rule sanity check. */
switch (r->action) {
case PF_MATCH:
if (r->divert.type != PF_DIVERT_NONE) {
yyerror("divert is not supported on match rules");
problems++;
}
if (r->rt) {
yyerror("route-to, reply-to and dup-to "
"are not supported on match rules");
problems++;
}
if (r->rule_flag & PFRULE_AFTO) {
yyerror("af-to is not supported on match rules");
problems++;
}
break;
case PF_DROP:
if (r->rt) {
yyerror("route-to, reply-to and dup-to "
"are not supported on block rules");
problems++;
}
break;
default:;
}
return (-problems);
}
int
process_tabledef(char *name, struct table_opts *opts, int popts)
{
struct pfr_buffer ab;
struct node_tinit *ti;
bzero(&ab, sizeof(ab));
ab.pfrb_type = PFRB_ADDRS;
SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
if (ti->file)
if (pfr_buf_load(&ab, ti->file, 0, popts)) {
if (errno)
yyerror("cannot load \"%s\": %s",
ti->file, strerror(errno));
else
yyerror("file \"%s\" contains bad data",
ti->file);
goto _error;
}
if (ti->host)
if (append_addr_host(&ab, ti->host, 0, 0)) {
yyerror("cannot create address buffer: %s",
strerror(errno));
goto _error;
}
}
if (pf->opts & PF_OPT_VERBOSE)
print_tabledef(name, opts->flags, opts->init_addr,
&opts->init_nodes);
if (!(pf->opts & PF_OPT_NOACTION) ||
(pf->opts & PF_OPT_DUMMYACTION))
warn_duplicate_tables(name, pf->anchor->path);
else if (pf->opts & PF_OPT_VERBOSE)
fprintf(stderr, "%s:%d: skipping duplicate table checks"
" for <%s>\n", file->name, yylval.lineno, name);
if (!(pf->opts & PF_OPT_NOACTION) &&
pfctl_define_table(name, opts->flags, opts->init_addr,
pf->anchor->path, &ab, pf->anchor->ruleset.tticket)) {
yyerror("cannot define table %s: %s", name,
pf_strerror(errno));
goto _error;
}
pf->tdirty = 1;
pfr_buf_clear(&ab);
return (0);
_error:
pfr_buf_clear(&ab);
return (-1);
}
struct keywords {
const char *k_name;
int k_val;
};
/* macro gore, but you should've seen the prior indentation nightmare... */
#define FREE_LIST(T,r) \
do { \
T *p, *node = r; \
while (node != NULL) { \
p = node; \
node = node->next; \
free(p); \
} \
} while (0)
#define LOOP_THROUGH(T,n,r,C) \
do { \
T *n; \
if (r == NULL) { \
r = calloc(1, sizeof(T)); \
if (r == NULL) \
err(1, "LOOP: calloc"); \
r->next = NULL; \
} \
n = r; \
while (n != NULL) { \
do { \
C; \
} while (0); \
n = n->next; \
} \
} while (0)
void
expand_label_str(char *label, size_t len, const char *srch, const char *repl)
{
char *tmp;
char *p, *q;
if ((tmp = calloc(1, len)) == NULL)
err(1, "%s", __func__);
p = q = label;
while ((q = strstr(p, srch)) != NULL) {
*q = '\0';
if ((strlcat(tmp, p, len) >= len) ||
(strlcat(tmp, repl, len) >= len))
errx(1, "expand_label: label too long");
q += strlen(srch);
p = q;
}
if (strlcat(tmp, p, len) >= len)
errx(1, "expand_label: label too long");
strlcpy(label, tmp, len); /* always fits */
free(tmp);
}
void
expand_label_if(const char *name, char *label, size_t len, const char *ifname)
{
if (strstr(label, name) != NULL) {
if (!*ifname)
expand_label_str(label, len, name, "any");
else
expand_label_str(label, len, name, ifname);
}
}
void
expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
struct node_host *h)
{
char tmp[64], tmp_not[66];
if (strstr(label, name) != NULL) {
switch (h->addr.type) {
case PF_ADDR_DYNIFTL:
snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
break;
case PF_ADDR_TABLE:
snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
break;
case PF_ADDR_NOROUTE:
snprintf(tmp, sizeof(tmp), "no-route");
break;
case PF_ADDR_URPFFAILED:
snprintf(tmp, sizeof(tmp), "urpf-failed");
break;
case PF_ADDR_ADDRMASK:
if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
PF_AZERO(&h->addr.v.a.mask, af)))
snprintf(tmp, sizeof(tmp), "any");
else {
char a[48];
int bits;
if (inet_ntop(af, &h->addr.v.a.addr, a,
sizeof(a)) == NULL)
snprintf(tmp, sizeof(tmp), "?");
else {
bits = unmask(&h->addr.v.a.mask);
if ((af == AF_INET && bits < 32) ||
(af == AF_INET6 && bits < 128))
snprintf(tmp, sizeof(tmp),
"%s/%d", a, bits);
else
snprintf(tmp, sizeof(tmp),
"%s", a);
}
}
break;
default:
snprintf(tmp, sizeof(tmp), "?");
break;
}
if (h->not) {
snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
expand_label_str(label, len, name, tmp_not);
} else
expand_label_str(label, len, name, tmp);
}
}
void
expand_label_port(const char *name, char *label, size_t len,
struct node_port *port)
{
char a1[6], a2[6], op[13] = "";
if (strstr(label, name) != NULL) {
snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
if (!port->op)
;
else if (port->op == PF_OP_IRG)
snprintf(op, sizeof(op), "%s><%s", a1, a2);
else if (port->op == PF_OP_XRG)
snprintf(op, sizeof(op), "%s<>%s", a1, a2);
else if (port->op == PF_OP_EQ)
snprintf(op, sizeof(op), "%s", a1);
else if (port->op == PF_OP_NE)
snprintf(op, sizeof(op), "!=%s", a1);
else if (port->op == PF_OP_LT)
snprintf(op, sizeof(op), "<%s", a1);
else if (port->op == PF_OP_LE)
snprintf(op, sizeof(op), "<=%s", a1);
else if (port->op == PF_OP_GT)
snprintf(op, sizeof(op), ">%s", a1);
else if (port->op == PF_OP_GE)
snprintf(op, sizeof(op), ">=%s", a1);
expand_label_str(label, len, name, op);
}
}
void
expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
{
struct protoent *pe;
char n[4];
if (strstr(label, name) != NULL) {
pe = getprotobynumber(proto);
if (pe != NULL)
expand_label_str(label, len, name, pe->p_name);
else {
snprintf(n, sizeof(n), "%u", proto);
expand_label_str(label, len, name, n);
}
}
}
void
pfctl_expand_label_nr(struct pf_rule *r, unsigned int rno)
{
char n[11];
snprintf(n, sizeof(n), "%u", rno);
if (strstr(r->label, "$nr") != NULL)
expand_label_str(r->label, PF_RULE_LABEL_SIZE, "$nr", n);
if (strstr(r->tagname, "$nr") != NULL)
expand_label_str(r->tagname, PF_TAG_NAME_SIZE, "$nr", n);
if (strstr(r->match_tagname, "$nr") != NULL)
expand_label_str(r->match_tagname, PF_TAG_NAME_SIZE, "$nr", n);
}
void
expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
struct node_host *src_host, struct node_port *src_port,
struct node_host *dst_host, struct node_port *dst_port,
u_int8_t proto)
{
expand_label_if("$if", label, len, ifname);
expand_label_addr("$srcaddr", label, len, af, src_host);
expand_label_addr("$dstaddr", label, len, af, dst_host);
expand_label_port("$srcport", label, len, src_port);
expand_label_port("$dstport", label, len, dst_port);
expand_label_proto("$proto", label, len, proto);
/* rule number, '$nr', gets expanded after optimizer */
}
int
expand_queue(char *qname, struct node_if *interfaces, struct queue_opts *opts)
{
struct pf_queuespec qspec;
LOOP_THROUGH(struct node_if, interface, interfaces,
bzero(&qspec, sizeof(qspec));
if (!opts->parent && (opts->marker & QOM_BWSPEC))
opts->flags |= PFQS_ROOTCLASS;
if (!(opts->marker & QOM_BWSPEC) &&
!(opts->marker & QOM_FLOWS)) {
yyerror("no bandwidth or flow specification");
return (1);
}
if (strlcpy(qspec.qname, qname, sizeof(qspec.qname)) >=
sizeof(qspec.qname)) {
yyerror("queuename too long");
return (1);
}
if (opts->parent && strlcpy(qspec.parent, opts->parent,
sizeof(qspec.parent)) >= sizeof(qspec.parent)) {
yyerror("parent too long");
return (1);
}
if (strlcpy(qspec.ifname, interface->ifname,
sizeof(qspec.ifname)) >= sizeof(qspec.ifname)) {
yyerror("interface too long");
return (1);
}
qspec.realtime.m1.absolute = opts->realtime.m1.bw_absolute;
qspec.realtime.m1.percent = opts->realtime.m1.bw_percent;
qspec.realtime.m2.absolute = opts->realtime.m2.bw_absolute;
qspec.realtime.m2.percent = opts->realtime.m2.bw_percent;
qspec.realtime.d = opts->realtime.d;
qspec.linkshare.m1.absolute = opts->linkshare.m1.bw_absolute;
qspec.linkshare.m1.percent = opts->linkshare.m1.bw_percent;
qspec.linkshare.m2.absolute = opts->linkshare.m2.bw_absolute;
qspec.linkshare.m2.percent = opts->linkshare.m2.bw_percent;
qspec.linkshare.d = opts->linkshare.d;
qspec.upperlimit.m1.absolute = opts->upperlimit.m1.bw_absolute;
qspec.upperlimit.m1.percent = opts->upperlimit.m1.bw_percent;
qspec.upperlimit.m2.absolute = opts->upperlimit.m2.bw_absolute;
qspec.upperlimit.m2.percent = opts->upperlimit.m2.bw_percent;
qspec.upperlimit.d = opts->upperlimit.d;
qspec.flowqueue.flows = opts->flowqueue.flows;
qspec.flowqueue.quantum = opts->flowqueue.quantum;
qspec.flowqueue.interval = opts->flowqueue.interval;
qspec.flowqueue.target = opts->flowqueue.target;
qspec.flags = opts->flags;
qspec.qlimit = opts->qlimit;
if (pfctl_add_queue(pf, &qspec)) {
yyerror("cannot add queue");
return (1);
}
);
FREE_LIST(struct node_if, interfaces);
return (0);
}
int
expand_divertspec(struct pf_rule *r, struct divertspec *ds)
{
struct node_host *n;
switch (ds->type) {
case PF_DIVERT_NONE:
return (0);
case PF_DIVERT_TO:
if (r->direction == PF_OUT) {
yyerror("divert-to used with outgoing rule");
return (1);
}
if (r->af) {
for (n = ds->addr; n != NULL; n = n->next)
if (n->af == r->af)
break;
if (n == NULL) {
yyerror("divert-to address family mismatch");
return (1);
}
r->divert.addr = n->addr.v.a.addr;
} else {
r->af = ds->addr->af;
r->divert.addr = ds->addr->addr.v.a.addr;
}
r->divert.port = ds->port;
r->divert.type = ds->type;
return (0);
case PF_DIVERT_REPLY:
if (r->direction == PF_IN) {
yyerror("divert-reply used with incoming rule");
return (1);
}
r->divert.type = ds->type;
return (0);
case PF_DIVERT_PACKET:
r->divert.port = ds->port;
r->divert.type = ds->type;
return (0);
}
return (1);
}
int
collapse_redirspec(struct pf_pool *rpool, struct pf_rule *r,
struct redirspec *rs, int routing)
{
struct pf_opt_tbl *tbl = NULL;
struct node_host *h, *hprev = NULL;
struct pf_rule_addr ra;
int af = 0, naddr = 0;
if (!rs || !rs->rdr || rs->rdr->host == NULL) {
rpool->addr.type = PF_ADDR_NONE;
return (0);
}
if (r->rule_flag & PFRULE_AFTO)
r->naf = rs->af;
for (h = rs->rdr->host; h != NULL; h = h->next) {
if (routing) {
if (h->addr.type == PF_ADDR_DYNIFTL &&
h->addr.iflags != PFI_AFLAG_PEER) {
yyerror("route spec requires :peer with "
"dynamic interface addresses");
return (1);
}
}
/* set rule address family if redirect spec has one */
if (rs->af && !r->af && !af) {
/* swap address families for af-to */
if (r->naf == AF_INET6)
af = AF_INET;
else if (r->naf == AF_INET)
af = AF_INET6;
else
af = rs->af;
}
if (h->af && !r->naf) { /* nat-to/rdr-to case */
/* skip if the rule af doesn't match redirect af */
if (r->af && r->af != h->af)
continue;
/*
* fail if the chosen af is not universal for
* all addresses in the redirect address pool
*/
if (!r->af && af && af != h->af) {
yyerror("%s spec contains addresses with "
"different address families",
routing ? "routing" : "translation");
return (1);
}
} else if (h->af) { /* af-to case */
/*
* fail if the redirect spec af is not universal
* for all addresses in the redirect address pool
*/
if (rs->af && rs->af != h->af) {
yyerror("%s spec contains addresses that "
"don't match target address family",
routing ? "routing" : "translation");
return (1);
}
}
/* else if (!h->af):
* we silently allow any not af-specific host specs,
* e.g. (em0) and let the kernel deal with them
*/
/* if we haven't selected the rule af yet, now it's time */
if (!r->af && !af)
af = h->af;
if (naddr == 0) { /* the first host */
rpool->addr = h->addr;
if (h->ifname) {
yyerror("@if not permitted for %s",
routing ? "routing" : "translation");
return (1);
}
if (h->ifname && strlcpy(rpool->ifname, h->ifname,
sizeof(rpool->ifname)) >= sizeof(rpool->ifname))
errx(1, "collapse_redirspec: strlcpy");
hprev = h; /* in case we need to conver to a table */
} else { /* multiple hosts */
if (rs->pool_opts.type &&
!PF_POOL_DYNTYPE(rs->pool_opts.type)) {
yyerror("pool type is not valid for multiple "
"translation or routing addresses");
return (1);
}
if ((hprev && hprev->addr.type != PF_ADDR_ADDRMASK) &&
(hprev && hprev->addr.type != PF_ADDR_NONE) &&
h->addr.type != PF_ADDR_ADDRMASK &&
h->addr.type != PF_ADDR_NONE) {
yyerror("multiple tables or dynamic interfaces "
"not supported for translation or routing");
return (1);
}
if (h->ifname) {
yyerror("@if not permitted for %s",
routing ? "routing" : "translation");
return (1);
}
if (hprev) {
/*
* undo some damage and convert the single
* host pool to the table
*/
memset(&ra, 0, sizeof(ra));
memset(rpool->ifname, 0, sizeof(rpool->ifname));
ra.addr = hprev->addr;
ra.weight = hprev->weight;
if (add_opt_table(pf, &tbl,
hprev->af, &ra, hprev->ifname))
return (1);
hprev = NULL;
}
memset(&ra, 0, sizeof(ra));
ra.addr = h->addr;
ra.weight = h->weight;
if (add_opt_table(pf, &tbl,
h->af, &ra, h->ifname))
return (1);
}
naddr++;
}
/* set rule af to the one chosen above */
if (!r->af && af)
r->af = af;
if (!naddr) {
yyerror("af mismatch in %s spec",
routing ? "routing" : "translation");
return (1);
}
if (tbl) {
if ((pf->opts & PF_OPT_NOACTION) == 0 &&
pf_opt_create_table(pf, tbl))
return (1);
pf->tdirty = 1;
if (pf->opts & PF_OPT_VERBOSE)
print_tabledef(tbl->pt_name,
PFR_TFLAG_CONST | tbl->pt_flags,
1, &tbl->pt_nodes);
memset(&rpool->addr, 0, sizeof(rpool->addr));
rpool->addr.type = PF_ADDR_TABLE;
strlcpy(rpool->addr.v.tblname, tbl->pt_name,
sizeof(rpool->addr.v.tblname));
pfr_buf_clear(tbl->pt_buf);
free(tbl->pt_buf);
tbl->pt_buf = NULL;
free(tbl);
}
return (0);
}
int
apply_redirspec(struct pf_pool *rpool, struct pf_rule *r, struct redirspec *rs,
int isrdr, struct node_port *np)
{
if (!rs || !rs->rdr)
return (0);
rpool->proxy_port[0] = ntohs(rs->rdr->rport.a);
if (isrdr) {
if (!rs->rdr->rport.b && rs->rdr->rport.t) {
rpool->proxy_port[1] = ntohs(rs->rdr->rport.a) +
(ntohs(np->port[1]) - ntohs(np->port[0]));
} else {
if (validate_range(rs->rdr->rport.t, rs->rdr->rport.a,
rs->rdr->rport.b)) {
yyerror("invalid rdr-to port range");
return (1);
}
rpool->port_op = rs->rdr->rport.t;
rpool->proxy_port[1] = ntohs(rs->rdr->rport.b);
}
} else {
rpool->proxy_port[1] = ntohs(rs->rdr->rport.b);
if (!rpool->proxy_port[0] && !rpool->proxy_port[1]) {
rpool->proxy_port[0] = PF_NAT_PROXY_PORT_LOW;
rpool->proxy_port[1] = PF_NAT_PROXY_PORT_HIGH;
} else if (!rpool->proxy_port[1])
rpool->proxy_port[1] = rpool->proxy_port[0];
}
rpool->opts = rs->pool_opts.type;
if ((rpool->opts & PF_POOL_TYPEMASK) == PF_POOL_NONE &&
(rpool->addr.type == PF_ADDR_TABLE ||
DYNIF_MULTIADDR(rpool->addr)))
rpool->opts |= PF_POOL_ROUNDROBIN;
if (!PF_POOL_DYNTYPE(rpool->opts) &&
(disallow_table(rs->rdr->host,
"tables are not supported by pool type") ||
disallow_alias(rs->rdr->host,
"interface (%s) is not supported by pool type")))
return (1);
if (rs->pool_opts.key != NULL)
memcpy(&rpool->key, rs->pool_opts.key,
sizeof(struct pf_poolhashkey));
if (rs->pool_opts.opts)
rpool->opts |= rs->pool_opts.opts;
if (rs->pool_opts.staticport) {
if (isrdr) {
yyerror("the 'static-port' option is only valid with "
"nat rules");
return (1);
}
if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW &&
rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) {
yyerror("the 'static-port' option can't be used when "
"specifying a port range");
return (1);
}
rpool->proxy_port[0] = 0;
rpool->proxy_port[1] = 0;
}
return (0);
}
void
expand_rule(struct pf_rule *r, int keeprule, struct node_if *interfaces,
struct redirspec *nat, struct redirspec *rdr, struct redirspec *rroute,
struct node_proto *protos, struct node_os *src_oses,
struct node_host *src_hosts, struct node_port *src_ports,
struct node_host *dst_hosts, struct node_port *dst_ports,
struct node_uid *uids, struct node_gid *gids, struct node_if *rcv,
struct node_icmp *icmp_types)
{
sa_family_t af = r->af;
int added = 0, error = 0;
char ifname[IF_NAMESIZE];
char label[PF_RULE_LABEL_SIZE];
char tagname[PF_TAG_NAME_SIZE];
char match_tagname[PF_TAG_NAME_SIZE];
u_int8_t flags, flagset, keep_state;
struct node_host *srch, *dsth, *osrch, *odsth;
struct redirspec binat;
struct pf_rule rb;
int dir = r->direction;
if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
errx(1, "expand_rule: strlcpy");
if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
errx(1, "expand_rule: strlcpy");
if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
sizeof(match_tagname))
errx(1, "expand_rule: strlcpy");
flags = r->flags;
flagset = r->flagset;
keep_state = r->keep_state;
r->src.addr.type = r->dst.addr.type = PF_ADDR_ADDRMASK;
LOOP_THROUGH(struct node_if, interface, interfaces,
LOOP_THROUGH(struct node_proto, proto, protos,
LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
LOOP_THROUGH(struct node_host, src_host, src_hosts,
LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
LOOP_THROUGH(struct node_port, src_port, src_ports,
LOOP_THROUGH(struct node_port, dst_port, dst_ports,
LOOP_THROUGH(struct node_os, src_os, src_oses,
LOOP_THROUGH(struct node_uid, uid, uids,
LOOP_THROUGH(struct node_gid, gid, gids,
r->af = af;
error += collapse_redirspec(&r->rdr, r, rdr, 0);
error += collapse_redirspec(&r->nat, r, nat, 0);
error += collapse_redirspec(&r->route, r, rroute, 1);
/* disallow @if in from or to for the time being */
if ((src_host->addr.type == PF_ADDR_ADDRMASK &&
src_host->ifname) ||
(dst_host->addr.type == PF_ADDR_ADDRMASK &&
dst_host->ifname)) {
yyerror("@if syntax not permitted in from or to");
error++;
}
/* for link-local IPv6 address, interface must match up */
if ((r->af && src_host->af && r->af != src_host->af) ||
(r->af && dst_host->af && r->af != dst_host->af) ||
(src_host->af && dst_host->af &&
src_host->af != dst_host->af) ||
(src_host->ifindex && dst_host->ifindex &&
src_host->ifindex != dst_host->ifindex) ||
(src_host->ifindex && *interface->ifname &&
src_host->ifindex != ifa_nametoindex(interface->ifname)) ||
(dst_host->ifindex && *interface->ifname &&
dst_host->ifindex != ifa_nametoindex(interface->ifname)))
continue;
if (!r->af && src_host->af)
r->af = src_host->af;
else if (!r->af && dst_host->af)
r->af = dst_host->af;
if (*interface->ifname)
strlcpy(r->ifname, interface->ifname,
sizeof(r->ifname));
else if (ifa_indextoname(src_host->ifindex, ifname))
strlcpy(r->ifname, ifname, sizeof(r->ifname));
else if (ifa_indextoname(dst_host->ifindex, ifname))
strlcpy(r->ifname, ifname, sizeof(r->ifname));
else
memset(r->ifname, '\0', sizeof(r->ifname));
if (interface->use_rdomain)
r->onrdomain = interface->rdomain;
else
r->onrdomain = -1;
if (strlcpy(r->label, label, sizeof(r->label)) >=
sizeof(r->label))
errx(1, "expand_rule: strlcpy");
if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
sizeof(r->tagname))
errx(1, "expand_rule: strlcpy");
if (strlcpy(r->match_tagname, match_tagname,
sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
errx(1, "expand_rule: strlcpy");
expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
src_host, src_port, dst_host, dst_port, proto->proto);
expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
src_host, src_port, dst_host, dst_port, proto->proto);
expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
r->af, src_host, src_port, dst_host, dst_port,
proto->proto);
osrch = odsth = NULL;
if (src_host->addr.type == PF_ADDR_DYNIFTL) {
osrch = src_host;
if ((src_host = gen_dynnode(src_host, r->af)) == NULL)
err(1, "%s", __func__);
}
if (dst_host->addr.type == PF_ADDR_DYNIFTL) {
odsth = dst_host;
if ((dst_host = gen_dynnode(dst_host, r->af)) == NULL)
err(1, "%s", __func__);
}
error += check_netmask(src_host, r->af);
error += check_netmask(dst_host, r->af);
r->ifnot = interface->not;
r->proto = proto->proto;
r->src.addr = src_host->addr;
r->src.neg = src_host->not;
r->src.port[0] = src_port->port[0];
r->src.port[1] = src_port->port[1];
r->src.port_op = src_port->op;
r->dst.addr = dst_host->addr;
r->dst.neg = dst_host->not;
r->dst.port[0] = dst_port->port[0];
r->dst.port[1] = dst_port->port[1];
r->dst.port_op = dst_port->op;
r->uid.op = uid->op;
r->uid.uid[0] = uid->uid[0];
r->uid.uid[1] = uid->uid[1];
r->gid.op = gid->op;
r->gid.gid[0] = gid->gid[0];
r->gid.gid[1] = gid->gid[1];
if (rcv) {
strlcpy(r->rcv_ifname, rcv->ifname,
sizeof(r->rcv_ifname));
r->rcvifnot = rcv->not;
}
r->type = icmp_type->type;
r->code = icmp_type->code;
if ((keep_state == PF_STATE_MODULATE ||
keep_state == PF_STATE_SYNPROXY) &&
r->proto && r->proto != IPPROTO_TCP)
r->keep_state = PF_STATE_NORMAL;
else
r->keep_state = keep_state;
if (r->proto && r->proto != IPPROTO_TCP) {
r->flags = 0;
r->flagset = 0;
} else {
r->flags = flags;
r->flagset = flagset;
}
if (icmp_type->proto && r->proto != icmp_type->proto) {
yyerror("icmp-type mismatch");
error++;
}
if (src_os && src_os->os) {
r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
if ((pf->opts & PF_OPT_VERBOSE2) &&
r->os_fingerprint == PF_OSFP_NOMATCH)
fprintf(stderr,
"warning: unknown '%s' OS fingerprint\n",
src_os->os);
} else {
r->os_fingerprint = PF_OSFP_ANY;
}
if (nat && nat->rdr && nat->binat) {
if (disallow_table(src_host, "invalid use of table "
"<%s> as the source address of a binat-to rule") ||
disallow_alias(src_host, "invalid use of interface "
"(%s) as the source address of a binat-to rule")) {
error++;
} else if ((r->src.addr.type != PF_ADDR_ADDRMASK &&
r->src.addr.type != PF_ADDR_DYNIFTL) ||
(r->nat.addr.type != PF_ADDR_ADDRMASK &&
r->nat.addr.type != PF_ADDR_DYNIFTL)) {
yyerror("binat-to requires a specified "
"source and redirect address");
error++;
}
if (DYNIF_MULTIADDR(r->src.addr) ||
DYNIF_MULTIADDR(r->nat.addr)) {
yyerror ("dynamic interfaces must be used with "
":0 in a binat-to rule");
error++;
}
if (PF_AZERO(&r->src.addr.v.a.mask, af) ||
PF_AZERO(&r->nat.addr.v.a.mask, af)) {
yyerror ("source and redir addresess must have "
"a matching network mask in binat-rule");
error++;
}
if (r->nat.addr.type == PF_ADDR_TABLE) {
yyerror ("tables cannot be used as the redirect "
"address of a binat-to rule");
error++;
}
if (r->direction != PF_INOUT) {
yyerror("binat-to cannot be specified "
"with a direction");
error++;
}
/* first specify outbound NAT rule */
r->direction = PF_OUT;
}
error += apply_redirspec(&r->nat, r, nat, 0, dst_port);
error += apply_redirspec(&r->rdr, r, rdr, 1, dst_port);
error += apply_redirspec(&r->route, r, rroute, 2, dst_port);
if (rule_consistent(r) < 0 || error)
yyerror("skipping rule due to errors");
else {
r->nr = pf->astack[pf->asd]->match++;
pfctl_add_rule(pf, r);
added++;
}
r->direction = dir;
/* Generate binat's matching inbound rule */
if (!error && nat && nat->rdr && nat->binat) {
bcopy(r, &rb, sizeof(rb));
/* now specify inbound rdr rule */
rb.direction = PF_IN;
if ((srch = calloc(1, sizeof(*srch))) == NULL)
err(1, "%s", __func__);
bcopy(src_host, srch, sizeof(*srch));
srch->ifname = NULL;
srch->next = NULL;
srch->tail = NULL;
if ((dsth = calloc(1, sizeof(*dsth))) == NULL)
err(1, "%s", __func__);
bcopy(&rb.nat.addr, &dsth->addr, sizeof(dsth->addr));
dsth->ifname = NULL;
dsth->next = NULL;
dsth->tail = NULL;
bzero(&binat, sizeof(binat));
if ((binat.rdr =
calloc(1, sizeof(*binat.rdr))) == NULL)
err(1, "%s", __func__);
bcopy(nat->rdr, binat.rdr, sizeof(*binat.rdr));
bcopy(&nat->pool_opts, &binat.pool_opts,
sizeof(binat.pool_opts));
binat.pool_opts.staticport = 0;
binat.rdr->host = srch;
expand_rule(&rb, 1, interface, NULL, &binat, NULL,
proto,
src_os, dst_host, dst_port, dsth, src_port,
uid, gid, rcv, icmp_type);
}
if (osrch && src_host->addr.type == PF_ADDR_DYNIFTL) {
free(src_host);
src_host = osrch;
}
if (odsth && dst_host->addr.type == PF_ADDR_DYNIFTL) {
free(dst_host);
dst_host = odsth;
}
))))))))));
if (!keeprule) {
FREE_LIST(struct node_if, interfaces);
FREE_LIST(struct node_proto, protos);
FREE_LIST(struct node_host, src_hosts);
FREE_LIST(struct node_port, src_ports);
FREE_LIST(struct node_os, src_oses);
FREE_LIST(struct node_host, dst_hosts);
FREE_LIST(struct node_port, dst_ports);
FREE_LIST(struct node_uid, uids);
FREE_LIST(struct node_gid, gids);
FREE_LIST(struct node_icmp, icmp_types);
if (nat && nat->rdr)
FREE_LIST(struct node_host, nat->rdr->host);
if (rdr && rdr->rdr)
FREE_LIST(struct node_host, rdr->rdr->host);
}
if (!added)
yyerror("rule expands to no valid combination");
}
int
expand_skip_interface(struct node_if *interfaces)
{
int errs = 0;
if (!interfaces || (!interfaces->next && !interfaces->not &&
!strcmp(interfaces->ifname, "none"))) {
if (pf->opts & PF_OPT_VERBOSE)
printf("set skip on none\n");
errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
return (errs);
}
if (pf->opts & PF_OPT_VERBOSE)
printf("set skip on {");
LOOP_THROUGH(struct node_if, interface, interfaces,
if (pf->opts & PF_OPT_VERBOSE)
printf(" %s", interface->ifname);
if (interface->not) {
yyerror("skip on ! <interface> is not supported");
errs++;
} else if (interface->use_rdomain) {
yyerror("skip on rdomain <num> is not supported");
errs++;
} else
errs += pfctl_set_interface_flags(pf,
interface->ifname, PFI_IFLAG_SKIP, 1);
);
if (pf->opts & PF_OPT_VERBOSE)
printf(" }\n");
FREE_LIST(struct node_if, interfaces);
if (errs)
return (1);
else
return (0);
}
void
freehostlist(struct node_host *h)
{
struct node_host *n;
for (n = h; n != NULL; n = n->next)
if (n->ifname)
free(n->ifname);
FREE_LIST(struct node_host, h);
}
#undef FREE_LIST
#undef LOOP_THROUGH
int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
int
lookup(char *s)
{
/* this has to be sorted always */
static const struct keywords keywords[] = {
{ "af-to", AFTO},
{ "all", ALL},
{ "allow-opts", ALLOWOPTS},
{ "anchor", ANCHOR},
{ "antispoof", ANTISPOOF},
{ "any", ANY},
{ "bandwidth", BANDWIDTH},
{ "binat-to", BINATTO},
{ "bitmask", BITMASK},
{ "block", BLOCK},
{ "block-policy", BLOCKPOLICY},
{ "burst", BURST},
{ "code", CODE},
{ "debug", DEBUG},
{ "default", DEFAULT},
{ "delay", DELAY},
{ "divert-packet", DIVERTPACKET},
{ "divert-reply", DIVERTREPLY},
{ "divert-to", DIVERTTO},
{ "drop", DROP},
{ "dup-to", DUPTO},
{ "file", FILENAME},
{ "fingerprints", FINGERPRINTS},
{ "flags", FLAGS},
{ "floating", FLOATING},
{ "flows", FLOWS},
{ "flush", FLUSH},
{ "for", FOR},
{ "fragment", FRAGMENT},
{ "from", FROM},
{ "global", GLOBAL},
{ "group", GROUP},
{ "hostid", HOSTID},
{ "icmp-type", ICMPTYPE},
{ "icmp6-type", ICMP6TYPE},
{ "if-bound", IFBOUND},
{ "in", IN},
{ "include", INCLUDE},
{ "inet", INET},
{ "inet6", INET6},
{ "keep", KEEP},
{ "label", LABEL},
{ "least-states", LEASTSTATES},
{ "limit", LIMIT},
{ "load", LOAD},
{ "log", LOG},
{ "loginterface", LOGINTERFACE},
{ "match", MATCH},
{ "matches", MATCHES},
{ "max", MAXIMUM},
{ "max-mss", MAXMSS},
{ "max-pkt-rate", MAXPKTRATE},
{ "max-src-conn", MAXSRCCONN},
{ "max-src-conn-rate", MAXSRCCONNRATE},
{ "max-src-nodes", MAXSRCNODES},
{ "max-src-states", MAXSRCSTATES},
{ "min", MINIMUM},
{ "min-ttl", MINTTL},
{ "modulate", MODULATE},
{ "nat-to", NATTO},
{ "no", NO},
{ "no-df", NODF},
{ "no-route", NOROUTE},
{ "no-sync", NOSYNC},
{ "on", ON},
{ "once", ONCE},
{ "optimization", OPTIMIZATION},
{ "os", OS},
{ "out", OUT},
{ "overload", OVERLOAD},
{ "parent", PARENT},
{ "pass", PASS},
{ "pflow", PFLOW},
{ "port", PORT},
{ "prio", PRIO},
{ "probability", PROBABILITY},
{ "proto", PROTO},
{ "qlimit", QLIMIT},
{ "quantum", QUANTUM},
{ "queue", QUEUE},
{ "quick", QUICK},
{ "random", RANDOM},
{ "random-id", RANDOMID},
{ "rdomain", RDOMAIN},
{ "rdr-to", RDRTO},
{ "reassemble", REASSEMBLE},
{ "received-on", RECEIVEDON},
{ "reply-to", REPLYTO},
{ "return", RETURN},
{ "return-icmp", RETURNICMP},
{ "return-icmp6", RETURNICMP6},
{ "return-rst", RETURNRST},
{ "round-robin", ROUNDROBIN},
{ "route", ROUTE},
{ "route-to", ROUTETO},
{ "rtable", RTABLE},
{ "rule", RULE},
{ "ruleset-optimization", RULESET_OPTIMIZATION},
{ "scrub", SCRUB},
{ "set", SET},
{ "skip", SKIP},
{ "sloppy", SLOPPY},
{ "source-hash", SOURCEHASH},
{ "source-track", SOURCETRACK},
{ "state", STATE},
{ "state-defaults", STATEDEFAULTS},
{ "state-policy", STATEPOLICY},
{ "static-port", STATICPORT},
{ "sticky-address", STICKYADDRESS},
{ "syncookies", SYNCOOKIES},
{ "synproxy", SYNPROXY},
{ "table", TABLE},
{ "tag", TAG},
{ "tagged", TAGGED},
{ "timeout", TIMEOUT},
{ "to", TO},
{ "tos", TOS},
{ "ttl", TTL},
{ "urpf-failed", URPFFAILED},
{ "user", USER},
{ "weight", WEIGHT},
};
const struct keywords *p;
p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
sizeof(keywords[0]), kw_cmp);
if (p) {
if (debug > 1)
fprintf(stderr, "%s: %d\n", s, p->k_val);
return (p->k_val);
} else {
if (debug > 1)
fprintf(stderr, "string: %s\n", s);
return (STRING);
}
}
#define START_EXPAND 1
#define DONE_EXPAND 2
static int expanding;
int
igetc(void)
{
int c;
while (1) {
if (file->ungetpos > 0)
c = file->ungetbuf[--file->ungetpos];
else
c = getc(file->stream);
if (c == START_EXPAND)
expanding = 1;
else if (c == DONE_EXPAND)
expanding = 0;
else
break;
}
return (c);
}
int
lgetc(int quotec)
{
int c, next;
if (quotec) {
if ((c = igetc()) == EOF) {
yyerror("reached end of file while parsing quoted string");
if (file == topfile || popfile() == EOF)
return (EOF);
return (quotec);
}
return (c);
}
while ((c = igetc()) == '\\') {
next = igetc();
if (next != '\n') {
c = next;
break;
}
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF) {
/*
* Fake EOL when hit EOF for the first time. This gets line
* count right if last line in included file is syntactically
* invalid and has no newline.
*/
if (file->eof_reached == 0) {
file->eof_reached = 1;
return ('\n');
}
while (c == EOF) {
if (file == topfile || popfile() == EOF)
return (EOF);
c = igetc();
}
}
return (c);
}
void
lungetc(int c)
{
if (c == EOF)
return;
if (file->ungetpos >= file->ungetsize) {
void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
if (p == NULL)
err(1, "%s", __func__);
file->ungetbuf = p;
file->ungetsize *= 2;
}
file->ungetbuf[file->ungetpos++] = c;
}
int
findeol(void)
{
int c;
/* skip to either EOF or the first real EOL */
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
char buf[8096];
char *p, *val;
int quotec, next, c;
int token;
top:
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
; /* nothing */
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
; /* nothing */
if (c == '$' && !expanding) {
while (1) {
if ((c = lgetc(0)) == EOF)
return (0);
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
if (isalnum(c) || c == '_') {
*p++ = c;
continue;
}
*p = '\0';
lungetc(c);
break;
}
val = symget(buf);
if (val == NULL) {
yyerror("macro '%s' not defined", buf);
return (findeol());
}
p = val + strlen(val) - 1;
lungetc(DONE_EXPAND);
while (p >= val) {
lungetc((unsigned char)*p);
p--;
}
lungetc(START_EXPAND);
goto top;
}
switch (c) {
case '\'':
case '"':
quotec = c;
while (1) {
if ((c = lgetc(quotec)) == EOF)
return (0);
if (c == '\n') {
file->lineno++;
continue;
} else if (c == '\\') {
if ((next = lgetc(quotec)) == EOF)
return (0);
if (next == quotec || next == ' ' ||
next == '\t')
c = next;
else if (next == '\n') {
file->lineno++;
continue;
} else
lungetc(next);
} else if (c == quotec) {
*p = '\0';
break;
} else if (c == '\0') {
yyerror("syntax error");
return (findeol());
}
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
*p++ = c;
}
yylval.v.string = strdup(buf);
if (yylval.v.string == NULL)
err(1, "%s", __func__);
return (STRING);
case '!':
next = lgetc(0);
if (next == '=')
return (NE);
lungetc(next);
break;
case '<':
next = lgetc(0);
if (next == '>') {
yylval.v.i = PF_OP_XRG;
return (PORTBINARY);
} else if (next == '=')
return (LE);
lungetc(next);
break;
case '>':
next = lgetc(0);
if (next == '<') {
yylval.v.i = PF_OP_IRG;
return (PORTBINARY);
} else if (next == '=')
return (GE);
lungetc(next);
break;
}
#define allowed_to_end_number(x) \
(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
if (c == '-' || isdigit(c)) {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && isdigit(c));
lungetc(c);
if (p == buf + 1 && buf[0] == '-')
goto nodigits;
if (c == EOF || allowed_to_end_number(c)) {
const char *errstr = NULL;
*p = '\0';
yylval.v.number = strtonum(buf, LLONG_MIN,
LLONG_MAX, &errstr);
if (errstr) {
yyerror("\"%s\" invalid number: %s",
buf, errstr);
return (findeol());
}
return (NUMBER);
} else {
nodigits:
while (p > buf + 1)
lungetc((unsigned char)*--p);
c = (unsigned char)*--p;
if (c == '-')
return (c);
}
}
#define allowed_in_string(x) \
(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
x != '{' && x != '}' && x != '<' && x != '>' && \
x != '!' && x != '=' && x != '/' && x != '#' && \
x != ','))
if (isalnum(c) || c == ':' || c == '_') {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
lungetc(c);
*p = '\0';
if ((token = lookup(buf)) == STRING)
if ((yylval.v.string = strdup(buf)) == NULL)
err(1, "%s", __func__);
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
int
check_file_secrecy(int fd, const char *fname)
{
struct stat st;
if (fstat(fd, &st)) {
warn("cannot stat %s", fname);
return (-1);
}
if (st.st_uid != 0 && st.st_uid != getuid()) {
warnx("%s: owner not root or current user", fname);
return (-1);
}
if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
warnx("%s: group writable or world read/writable", fname);
return (-1);
}
return (0);
}
struct file *
pushfile(const char *name, int secret)
{
struct file *nfile;
if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
(nfile->name = strdup(name)) == NULL) {
warn("%s", __func__);
if (nfile)
free(nfile);
return (NULL);
}
if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
nfile->stream = stdin;
free(nfile->name);
if ((nfile->name = strdup("stdin")) == NULL) {
warn("%s", __func__);
free(nfile);
return (NULL);
}
} else if ((nfile->stream = pfctl_fopen(nfile->name, "r")) == NULL) {
warn("%s: %s", __func__, nfile->name);
free(nfile->name);
free(nfile);
return (NULL);
} else if (secret &&
check_file_secrecy(fileno(nfile->stream), nfile->name)) {
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
nfile->ungetsize = 16;
nfile->ungetbuf = malloc(nfile->ungetsize);
if (nfile->ungetbuf == NULL) {
warn("%s", __func__);
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
TAILQ_INSERT_TAIL(&files, nfile, entry);
return (nfile);
}
int
popfile(void)
{
struct file *prev;
if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
prev->errors += file->errors;
TAILQ_REMOVE(&files, file, entry);
fclose(file->stream);
free(file->name);
free(file->ungetbuf);
free(file);
file = prev;
return (file ? 0 : EOF);
}
int
parse_config(char *filename, struct pfctl *xpf)
{
int errors = 0;
struct sym *sym;
pf = xpf;
returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
returnicmp6default =
(ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
blockpolicy = PFRULE_DROP;
if ((file = pushfile(filename, 0)) == NULL) {
warn("cannot open the main config file!");
return (-1);
}
topfile = file;
yyparse();
errors = file->errors;
popfile();
/* Free macros and check which have not been used. */
while ((sym = TAILQ_FIRST(&symhead))) {
if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
fprintf(stderr, "warning: macro '%s' not "
"used\n", sym->nam);
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
return (errors ? -1 : 0);
}
int
symset(const char *nam, const char *val, int persist)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0)
break;
}
if (sym != NULL) {
if (sym->persist == 1)
return (0);
else {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
if ((sym = calloc(1, sizeof(*sym))) == NULL)
return (-1);
sym->nam = strdup(nam);
if (sym->nam == NULL) {
free(sym);
return (-1);
}
sym->val = strdup(val);
if (sym->val == NULL) {
free(sym->nam);
free(sym);
return (-1);
}
sym->used = 0;
sym->persist = persist;
TAILQ_INSERT_TAIL(&symhead, sym, entry);
return (0);
}
int
pfctl_cmdline_symset(char *s)
{
char *sym, *val;
int ret;
if ((val = strrchr(s, '=')) == NULL)
return (-1);
sym = strndup(s, val - s);
if (sym == NULL)
err(1, "%s", __func__);
ret = symset(sym, val + 1, 1);
free(sym);
return (ret);
}
char *
symget(const char *nam)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0) {
sym->used = 1;
return (sym->val);
}
}
return (NULL);
}
void
mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
{
struct pf_rule *r;
TAILQ_FOREACH(r, src->rules.active.ptr, entries)
dst->anchor->match++;
TAILQ_CONCAT(dst->rules.active.ptr, src->rules.active.ptr, entries);
src->anchor->match = 0;
TAILQ_CONCAT(dst->rules.inactive.ptr, src->rules.inactive.ptr, entries);
}
void
decide_address_family(struct node_host *n, sa_family_t *af)
{
if (*af != 0 || n == NULL)
return;
*af = n->af;
while ((n = n->next) != NULL) {
if (n->af != *af) {
*af = 0;
return;
}
}
}
int
invalid_redirect(struct node_host *nh, sa_family_t af)
{
if (!af) {
struct node_host *n;
/* tables and dyniftl are ok without an address family */
for (n = nh; n != NULL; n = n->next) {
if (n->addr.type != PF_ADDR_TABLE &&
n->addr.type != PF_ADDR_DYNIFTL) {
yyerror("address family not given and "
"translation address expands to multiple "
"address families");
return (1);
}
}
}
if (nh == NULL) {
yyerror("no translation address with matching address family "
"found.");
return (1);
}
return (0);
}
int
atoul(char *s, u_long *ulvalp)
{
u_long ulval;
char *ep;
errno = 0;
ulval = strtoul(s, &ep, 0);
if (s[0] == '\0' || *ep != '\0')
return (-1);
if (errno == ERANGE && ulval == ULONG_MAX)
return (-1);
*ulvalp = ulval;
return (0);
}
int
getservice(char *n)
{
struct servent *s;
u_long ulval;
if (atoul(n, &ulval) == 0) {
if (ulval > 65535) {
yyerror("illegal port value %lu", ulval);
return (-1);
}
return (htons(ulval));
} else {
s = getservbyname(n, "tcp");
if (s == NULL)
s = getservbyname(n, "udp");
if (s == NULL) {
yyerror("unknown port %s", n);
return (-1);
}
return (s->s_port);
}
}
int
rule_label(struct pf_rule *r, char *s)
{
if (s) {
if (strlcpy(r->label, s, sizeof(r->label)) >=
sizeof(r->label)) {
yyerror("rule label too long (max %zu chars)",
sizeof(r->label)-1);
return (-1);
}
}
return (0);
}
u_int16_t
parseicmpspec(char *w, sa_family_t af)
{
const struct icmpcodeent *p;
u_long ulval;
u_int8_t icmptype;
if (af == AF_INET)
icmptype = returnicmpdefault >> 8;
else
icmptype = returnicmp6default >> 8;
if (atoul(w, &ulval) == -1) {
if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
yyerror("unknown icmp code %s", w);
return (0);
}
ulval = p->code;
}
if (ulval > 255) {
yyerror("invalid icmp code %lu", ulval);
return (0);
}
return (icmptype << 8 | ulval);
}
int
parseport(char *port, struct range *r, int extensions)
{
char *p = strchr(port, ':');
if (p == NULL) {
if ((r->a = getservice(port)) == -1)
return (-1);
r->b = 0;
r->t = PF_OP_NONE;
return (0);
}
if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
*p = 0;
if ((r->a = getservice(port)) == -1)
return (-1);
r->b = 0;
r->t = PF_OP_IRG;
return (0);
}
if ((extensions & PPORT_RANGE)) {
*p++ = 0;
if ((r->a = getservice(port)) == -1 ||
(r->b = getservice(p)) == -1)
return (-1);
if (r->a == r->b) {
r->b = 0;
r->t = PF_OP_NONE;
} else
r->t = PF_OP_RRG;
return (0);
}
yyerror("port is invalid: %s", port);
return (-1);
}
int
pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
{
struct loadanchors *la;
TAILQ_FOREACH(la, &loadanchorshead, entries) {
if (pf->opts & PF_OPT_VERBOSE)
fprintf(stderr, "\nLoading anchor %s from %s\n",
la->anchorname, la->filename);
if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
la->anchorname, trans) == -1)
return (-1);
}
return (0);
}
int
kw_casecmp(const void *k, const void *e)
{
return (strcasecmp(k, ((const struct keywords *)e)->k_name));
}
int
map_tos(char *s, int *val)
{
/* DiffServ Codepoints and other TOS mappings */
const struct keywords toswords[] = {
{ "af11", IPTOS_DSCP_AF11 },
{ "af12", IPTOS_DSCP_AF12 },
{ "af13", IPTOS_DSCP_AF13 },
{ "af21", IPTOS_DSCP_AF21 },
{ "af22", IPTOS_DSCP_AF22 },
{ "af23", IPTOS_DSCP_AF23 },
{ "af31", IPTOS_DSCP_AF31 },
{ "af32", IPTOS_DSCP_AF32 },
{ "af33", IPTOS_DSCP_AF33 },
{ "af41", IPTOS_DSCP_AF41 },
{ "af42", IPTOS_DSCP_AF42 },
{ "af43", IPTOS_DSCP_AF43 },
{ "critical", IPTOS_PREC_CRITIC_ECP },
{ "cs0", IPTOS_DSCP_CS0 },
{ "cs1", IPTOS_DSCP_CS1 },
{ "cs2", IPTOS_DSCP_CS2 },
{ "cs3", IPTOS_DSCP_CS3 },
{ "cs4", IPTOS_DSCP_CS4 },
{ "cs5", IPTOS_DSCP_CS5 },
{ "cs6", IPTOS_DSCP_CS6 },
{ "cs7", IPTOS_DSCP_CS7 },
{ "ef", IPTOS_DSCP_EF },
{ "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
{ "lowdelay", IPTOS_LOWDELAY },
{ "netcontrol", IPTOS_PREC_NETCONTROL },
{ "reliability", IPTOS_RELIABILITY },
{ "throughput", IPTOS_THROUGHPUT }
};
const struct keywords *p;
p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]),
sizeof(toswords[0]), kw_casecmp);
if (p) {
*val = p->k_val;
return (1);
}
return (0);
}
int
lookup_rtable(u_int rtableid)
{
size_t len;
struct rt_tableinfo info;
int mib[6];
static u_int found[RT_TABLEID_MAX+1];
if (found[rtableid])
return found[rtableid];
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = 0;
mib[4] = NET_RT_TABLE;
mib[5] = rtableid;
len = sizeof(info);
if (sysctl(mib, 6, &info, &len, NULL, 0) == -1) {
if (errno == ENOENT) {
/* table nonexistent */
found[rtableid] = 0;
return 0;
}
err(1, "%s", __func__);
}
found[rtableid] = 1;
return 1;
}
int
filteropts_to_rule(struct pf_rule *r, struct filter_opts *opts)
{
if (opts->marker & FOM_ONCE) {
if ((r->action != PF_PASS && r->action != PF_DROP) || r->anchor) {
yyerror("'once' only applies to pass/block rules");
return (1);
}
r->rule_flag |= PFRULE_ONCE;
}
r->keep_state = opts->keep.action;
r->pktrate.limit = opts->pktrate.limit;
r->pktrate.seconds = opts->pktrate.seconds;
r->prob = opts->prob;
r->rtableid = opts->rtableid;
r->tos = opts->tos;
if (opts->nodf)
r->scrub_flags |= PFSTATE_NODF;
if (opts->randomid)
r->scrub_flags |= PFSTATE_RANDOMID;
if (opts->minttl)
r->min_ttl = opts->minttl;
if (opts->max_mss)
r->max_mss = opts->max_mss;
if (opts->tag)
if (strlcpy(r->tagname, opts->tag,
PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
yyerror("tag too long, max %u chars",
PF_TAG_NAME_SIZE - 1);
return (1);
}
if (opts->match_tag)
if (strlcpy(r->match_tagname, opts->match_tag,
PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
yyerror("tag too long, max %u chars",
PF_TAG_NAME_SIZE - 1);
return (1);
}
r->match_tag_not = opts->match_tag_not;
if (rule_label(r, opts->label))
return (1);
free(opts->label);
if (opts->marker & FOM_AFTO)
r->rule_flag |= PFRULE_AFTO;
if ((opts->marker & FOM_AFTO) && r->direction != PF_IN) {
yyerror("af-to can only be used with direction in");
return (1);
}
if ((opts->marker & FOM_AFTO) && opts->rt) {
yyerror("af-to cannot be used together with "
"route-to, reply-to, dup-to");
return (1);
}
if (opts->marker & FOM_SCRUB_TCP)
r->scrub_flags |= PFSTATE_SCRUB_TCP;
if (opts->marker & FOM_SETDELAY) {
r->delay = opts->delay;
r->rule_flag |= PFRULE_SETDELAY;
}
if (opts->marker & FOM_SETPRIO) {
r->set_prio[0] = opts->set_prio[0];
r->set_prio[1] = opts->set_prio[1];
r->scrub_flags |= PFSTATE_SETPRIO;
}
if (opts->marker & FOM_SETTOS) {
r->scrub_flags |= PFSTATE_SETTOS;
r->set_tos = opts->settos;
}
if (opts->marker & FOM_PRIO)
r->prio = opts->prio ? opts->prio : PF_PRIO_ZERO;
if (opts->marker & FOM_SETPRIO) {
r->set_prio[0] = opts->set_prio[0];
r->set_prio[1] = opts->set_prio[1];
r->scrub_flags |= PFSTATE_SETPRIO;
}
r->flags = opts->flags.b1;
r->flagset = opts->flags.b2;
if ((opts->flags.b1 & opts->flags.b2) != opts->flags.b1) {
yyerror("flags always false");
return (1);
}
if (opts->queues.qname != NULL) {
if (strlcpy(r->qname, opts->queues.qname,
sizeof(r->qname)) >= sizeof(r->qname)) {
yyerror("rule qname too long (max "
"%zu chars)", sizeof(r->qname)-1);
return (1);
}
free(opts->queues.qname);
}
if (opts->queues.pqname != NULL) {
if (strlcpy(r->pqname, opts->queues.pqname,
sizeof(r->pqname)) >= sizeof(r->pqname)) {
yyerror("rule pqname too long (max "
"%zu chars)", sizeof(r->pqname)-1);
return (1);
}
free(opts->queues.pqname);
}
if (opts->fragment)
r->rule_flag |= PFRULE_FRAGMENT;
r->allow_opts = opts->allowopts;
return (0);
}
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