1/*-
2 * Copyright (c) 2002-2003 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
5 *
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
8 *
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
11 *
12 * Redistribution in binary form may occur without any restrictions.
13 * Obviously, it would be nice if you gave credit where credit is due
14 * but requiring it would be too onerous.
15 *
16 * This software is provided ``AS IS'' without any warranties of any kind.
17 *
18 * NEW command line interface for IP firewall facility
19 *
20 * $FreeBSD$
21 */
22
23#include <sys/types.h>
24#include <sys/param.h>
25#include <sys/socket.h>
26#include <sys/sockio.h>
27#include <sys/sysctl.h>
28
29#include "ipfw2.h"
30
31#include <ctype.h>
32#include <err.h>
33#include <errno.h>
34#include <grp.h>
35#include <jail.h>
36#include <netdb.h>
37#include <pwd.h>
38#include <stdio.h>
39#include <stdarg.h>
40#include <stdint.h>
41#include <stdlib.h>
42#include <string.h>
43#include <sysexits.h>
44#include <time.h>	/* ctime */
45#include <timeconv.h>	/* _long_to_time */
46#include <unistd.h>
47#include <fcntl.h>
48#include <stddef.h>	/* offsetof */
49
50#include <net/ethernet.h>
51#include <net/if.h>		/* only IFNAMSIZ */
52#include <netinet/in.h>
53#include <netinet/in_systm.h>	/* only n_short, n_long */
54#include <netinet/ip.h>
55#include <netinet/ip_icmp.h>
56#include <netinet/ip_fw.h>
57#include <netinet/tcp.h>
58#include <arpa/inet.h>
59
60struct cmdline_opts co;	/* global options */
61
62struct format_opts {
63	int bcwidth;
64	int pcwidth;
65	int show_counters;
66	int show_time;		/* show timestamp */
67	uint32_t set_mask;	/* enabled sets mask */
68	uint32_t flags;		/* request flags */
69	uint32_t first;		/* first rule to request */
70	uint32_t last;		/* last rule to request */
71	uint32_t dcnt;		/* number of dynamic states */
72	ipfw_obj_ctlv *tstate;	/* table state data */
73};
74
75int resvd_set_number = RESVD_SET;
76
77int ipfw_socket = -1;
78
79#define	CHECK_LENGTH(v, len) do {				\
80	if ((v) < (len))					\
81		errx(EX_DATAERR, "Rule too long");		\
82	} while (0)
83/*
84 * Check if we have enough space in cmd buffer. Note that since
85 * first 8? u32 words are reserved by reserved header, full cmd
86 * buffer can't be used, so we need to protect from buffer overrun
87 * only. At the beginning, cblen is less than actual buffer size by
88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
89 * for checking small instructions fitting in given range.
90 * We also (ab)use the fact that ipfw_insn is always the first field
91 * for any custom instruction.
92 */
93#define	CHECK_CMDLEN	CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
94
95#define GET_UINT_ARG(arg, min, max, tok, s_x) do {			\
96	if (!av[0])							\
97		errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
98	if (_substrcmp(*av, "tablearg") == 0) {				\
99		arg = IP_FW_TARG;					\
100		break;							\
101	}								\
102									\
103	{								\
104	long _xval;							\
105	char *end;							\
106									\
107	_xval = strtol(*av, &end, 10);					\
108									\
109	if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
110		errx(EX_DATAERR, "%s: invalid argument: %s",		\
111		    match_value(s_x, tok), *av);			\
112									\
113	if (errno == ERANGE || _xval < min || _xval > max)		\
114		errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
115		    match_value(s_x, tok), min, max, *av);		\
116									\
117	if (_xval == IP_FW_TARG)					\
118		errx(EX_DATAERR, "%s: illegal argument value: %s",	\
119		    match_value(s_x, tok), *av);			\
120	arg = _xval;							\
121	}								\
122} while (0)
123
124static struct _s_x f_tcpflags[] = {
125	{ "syn", TH_SYN },
126	{ "fin", TH_FIN },
127	{ "ack", TH_ACK },
128	{ "psh", TH_PUSH },
129	{ "rst", TH_RST },
130	{ "urg", TH_URG },
131	{ "tcp flag", 0 },
132	{ NULL,	0 }
133};
134
135static struct _s_x f_tcpopts[] = {
136	{ "mss",	IP_FW_TCPOPT_MSS },
137	{ "maxseg",	IP_FW_TCPOPT_MSS },
138	{ "window",	IP_FW_TCPOPT_WINDOW },
139	{ "sack",	IP_FW_TCPOPT_SACK },
140	{ "ts",		IP_FW_TCPOPT_TS },
141	{ "timestamp",	IP_FW_TCPOPT_TS },
142	{ "cc",		IP_FW_TCPOPT_CC },
143	{ "tcp option",	0 },
144	{ NULL,	0 }
145};
146
147/*
148 * IP options span the range 0 to 255 so we need to remap them
149 * (though in fact only the low 5 bits are significant).
150 */
151static struct _s_x f_ipopts[] = {
152	{ "ssrr",	IP_FW_IPOPT_SSRR},
153	{ "lsrr",	IP_FW_IPOPT_LSRR},
154	{ "rr",		IP_FW_IPOPT_RR},
155	{ "ts",		IP_FW_IPOPT_TS},
156	{ "ip option",	0 },
157	{ NULL,	0 }
158};
159
160static struct _s_x f_iptos[] = {
161	{ "lowdelay",	IPTOS_LOWDELAY},
162	{ "throughput",	IPTOS_THROUGHPUT},
163	{ "reliability", IPTOS_RELIABILITY},
164	{ "mincost",	IPTOS_MINCOST},
165	{ "congestion",	IPTOS_ECN_CE},
166	{ "ecntransport", IPTOS_ECN_ECT0},
167	{ "ip tos option", 0},
168	{ NULL,	0 }
169};
170
171struct _s_x f_ipdscp[] = {
172	{ "af11", IPTOS_DSCP_AF11 >> 2 },	/* 001010 */
173	{ "af12", IPTOS_DSCP_AF12 >> 2 },	/* 001100 */
174	{ "af13", IPTOS_DSCP_AF13 >> 2 },	/* 001110 */
175	{ "af21", IPTOS_DSCP_AF21 >> 2 },	/* 010010 */
176	{ "af22", IPTOS_DSCP_AF22 >> 2 },	/* 010100 */
177	{ "af23", IPTOS_DSCP_AF23 >> 2 },	/* 010110 */
178	{ "af31", IPTOS_DSCP_AF31 >> 2 },	/* 011010 */
179	{ "af32", IPTOS_DSCP_AF32 >> 2 },	/* 011100 */
180	{ "af33", IPTOS_DSCP_AF33 >> 2 },	/* 011110 */
181	{ "af41", IPTOS_DSCP_AF41 >> 2 },	/* 100010 */
182	{ "af42", IPTOS_DSCP_AF42 >> 2 },	/* 100100 */
183	{ "af43", IPTOS_DSCP_AF43 >> 2 },	/* 100110 */
184	{ "be", IPTOS_DSCP_CS0 >> 2 }, 	/* 000000 */
185	{ "ef", IPTOS_DSCP_EF >> 2 },	/* 101110 */
186	{ "cs0", IPTOS_DSCP_CS0 >> 2 },	/* 000000 */
187	{ "cs1", IPTOS_DSCP_CS1 >> 2 },	/* 001000 */
188	{ "cs2", IPTOS_DSCP_CS2 >> 2 },	/* 010000 */
189	{ "cs3", IPTOS_DSCP_CS3 >> 2 },	/* 011000 */
190	{ "cs4", IPTOS_DSCP_CS4 >> 2 },	/* 100000 */
191	{ "cs5", IPTOS_DSCP_CS5 >> 2 },	/* 101000 */
192	{ "cs6", IPTOS_DSCP_CS6 >> 2 },	/* 110000 */
193	{ "cs7", IPTOS_DSCP_CS7 >> 2 },	/* 100000 */
194	{ NULL, 0 }
195};
196
197static struct _s_x limit_masks[] = {
198	{"all",		DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
199	{"src-addr",	DYN_SRC_ADDR},
200	{"src-port",	DYN_SRC_PORT},
201	{"dst-addr",	DYN_DST_ADDR},
202	{"dst-port",	DYN_DST_PORT},
203	{NULL,		0}
204};
205
206/*
207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
208 * This is only used in this code.
209 */
210#define IPPROTO_ETHERTYPE	0x1000
211static struct _s_x ether_types[] = {
212    /*
213     * Note, we cannot use "-:&/" in the names because they are field
214     * separators in the type specifications. Also, we use s = NULL as
215     * end-delimiter, because a type of 0 can be legal.
216     */
217	{ "ip",		0x0800 },
218	{ "ipv4",	0x0800 },
219	{ "ipv6",	0x86dd },
220	{ "arp",	0x0806 },
221	{ "rarp",	0x8035 },
222	{ "vlan",	0x8100 },
223	{ "loop",	0x9000 },
224	{ "trail",	0x1000 },
225	{ "at",		0x809b },
226	{ "atalk",	0x809b },
227	{ "aarp",	0x80f3 },
228	{ "pppoe_disc",	0x8863 },
229	{ "pppoe_sess",	0x8864 },
230	{ "ipx_8022",	0x00E0 },
231	{ "ipx_8023",	0x0000 },
232	{ "ipx_ii",	0x8137 },
233	{ "ipx_snap",	0x8137 },
234	{ "ipx",	0x8137 },
235	{ "ns",		0x0600 },
236	{ NULL,		0 }
237};
238
239static struct _s_x rule_eactions[] = {
240	{ "nat64clat",		TOK_NAT64CLAT },
241	{ "nat64lsn",		TOK_NAT64LSN },
242	{ "nat64stl",		TOK_NAT64STL },
243	{ "nptv6",		TOK_NPTV6 },
244	{ "tcp-setmss",		TOK_TCPSETMSS },
245	{ NULL, 0 }	/* terminator */
246};
247
248static struct _s_x rule_actions[] = {
249	{ "abort6",		TOK_ABORT6 },
250	{ "abort",		TOK_ABORT },
251	{ "accept",		TOK_ACCEPT },
252	{ "pass",		TOK_ACCEPT },
253	{ "allow",		TOK_ACCEPT },
254	{ "permit",		TOK_ACCEPT },
255	{ "count",		TOK_COUNT },
256	{ "pipe",		TOK_PIPE },
257	{ "queue",		TOK_QUEUE },
258	{ "divert",		TOK_DIVERT },
259	{ "tee",		TOK_TEE },
260	{ "netgraph",		TOK_NETGRAPH },
261	{ "ngtee",		TOK_NGTEE },
262	{ "fwd",		TOK_FORWARD },
263	{ "forward",		TOK_FORWARD },
264	{ "skipto",		TOK_SKIPTO },
265	{ "deny",		TOK_DENY },
266	{ "drop",		TOK_DENY },
267	{ "reject",		TOK_REJECT },
268	{ "reset6",		TOK_RESET6 },
269	{ "reset",		TOK_RESET },
270	{ "unreach6",		TOK_UNREACH6 },
271	{ "unreach",		TOK_UNREACH },
272	{ "check-state",	TOK_CHECKSTATE },
273	{ "//",			TOK_COMMENT },
274	{ "nat",		TOK_NAT },
275	{ "reass",		TOK_REASS },
276	{ "setfib",		TOK_SETFIB },
277	{ "setdscp",		TOK_SETDSCP },
278	{ "call",		TOK_CALL },
279	{ "return",		TOK_RETURN },
280	{ "eaction",		TOK_EACTION },
281	{ "tcp-setmss",		TOK_TCPSETMSS },
282	{ NULL, 0 }	/* terminator */
283};
284
285static struct _s_x rule_action_params[] = {
286	{ "altq",		TOK_ALTQ },
287	{ "log",		TOK_LOG },
288	{ "tag",		TOK_TAG },
289	{ "untag",		TOK_UNTAG },
290	{ NULL, 0 }	/* terminator */
291};
292
293/*
294 * The 'lookup' instruction accepts one of the following arguments.
295 * -1 is a terminator for the list.
296 * Arguments are passed as v[1] in O_DST_LOOKUP options.
297 */
298static int lookup_key[] = {
299	TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
300	TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
301
302static struct _s_x rule_options[] = {
303	{ "tagged",		TOK_TAGGED },
304	{ "uid",		TOK_UID },
305	{ "gid",		TOK_GID },
306	{ "jail",		TOK_JAIL },
307	{ "in",			TOK_IN },
308	{ "limit",		TOK_LIMIT },
309	{ "set-limit",		TOK_SETLIMIT },
310	{ "keep-state",		TOK_KEEPSTATE },
311	{ "record-state",	TOK_RECORDSTATE },
312	{ "bridged",		TOK_LAYER2 },
313	{ "layer2",		TOK_LAYER2 },
314	{ "out",		TOK_OUT },
315	{ "diverted",		TOK_DIVERTED },
316	{ "diverted-loopback",	TOK_DIVERTEDLOOPBACK },
317	{ "diverted-output",	TOK_DIVERTEDOUTPUT },
318	{ "xmit",		TOK_XMIT },
319	{ "recv",		TOK_RECV },
320	{ "via",		TOK_VIA },
321	{ "fragment",		TOK_FRAG },
322	{ "frag",		TOK_FRAG },
323	{ "fib",		TOK_FIB },
324	{ "ipoptions",		TOK_IPOPTS },
325	{ "ipopts",		TOK_IPOPTS },
326	{ "iplen",		TOK_IPLEN },
327	{ "ipid",		TOK_IPID },
328	{ "ipprecedence",	TOK_IPPRECEDENCE },
329	{ "dscp",		TOK_DSCP },
330	{ "iptos",		TOK_IPTOS },
331	{ "ipttl",		TOK_IPTTL },
332	{ "ipversion",		TOK_IPVER },
333	{ "ipver",		TOK_IPVER },
334	{ "estab",		TOK_ESTAB },
335	{ "established",	TOK_ESTAB },
336	{ "setup",		TOK_SETUP },
337	{ "sockarg",		TOK_SOCKARG },
338	{ "tcpdatalen",		TOK_TCPDATALEN },
339	{ "tcpflags",		TOK_TCPFLAGS },
340	{ "tcpflgs",		TOK_TCPFLAGS },
341	{ "tcpmss",		TOK_TCPMSS },
342	{ "tcpoptions",		TOK_TCPOPTS },
343	{ "tcpopts",		TOK_TCPOPTS },
344	{ "tcpseq",		TOK_TCPSEQ },
345	{ "tcpack",		TOK_TCPACK },
346	{ "tcpwin",		TOK_TCPWIN },
347	{ "icmptype",		TOK_ICMPTYPES },
348	{ "icmptypes",		TOK_ICMPTYPES },
349	{ "dst-ip",		TOK_DSTIP },
350	{ "src-ip",		TOK_SRCIP },
351	{ "dst-port",		TOK_DSTPORT },
352	{ "src-port",		TOK_SRCPORT },
353	{ "proto",		TOK_PROTO },
354	{ "MAC",		TOK_MAC },
355	{ "mac",		TOK_MAC },
356	{ "mac-type",		TOK_MACTYPE },
357	{ "verrevpath",		TOK_VERREVPATH },
358	{ "versrcreach",	TOK_VERSRCREACH },
359	{ "antispoof",		TOK_ANTISPOOF },
360	{ "ipsec",		TOK_IPSEC },
361	{ "icmp6type",		TOK_ICMP6TYPES },
362	{ "icmp6types",		TOK_ICMP6TYPES },
363	{ "ext6hdr",		TOK_EXT6HDR},
364	{ "flow-id",		TOK_FLOWID},
365	{ "ipv6",		TOK_IPV6},
366	{ "ip6",		TOK_IPV6},
367	{ "ipv4",		TOK_IPV4},
368	{ "ip4",		TOK_IPV4},
369	{ "dst-ipv6",		TOK_DSTIP6},
370	{ "dst-ip6",		TOK_DSTIP6},
371	{ "src-ipv6",		TOK_SRCIP6},
372	{ "src-ip6",		TOK_SRCIP6},
373	{ "lookup",		TOK_LOOKUP},
374	{ "flow",		TOK_FLOW},
375	{ "defer-action",	TOK_SKIPACTION },
376	{ "defer-immediate-action",	TOK_SKIPACTION },
377	{ "//",			TOK_COMMENT },
378
379	{ "not",		TOK_NOT },		/* pseudo option */
380	{ "!", /* escape ? */	TOK_NOT },		/* pseudo option */
381	{ "or",			TOK_OR },		/* pseudo option */
382	{ "|", /* escape */	TOK_OR },		/* pseudo option */
383	{ "{",			TOK_STARTBRACE },	/* pseudo option */
384	{ "(",			TOK_STARTBRACE },	/* pseudo option */
385	{ "}",			TOK_ENDBRACE },		/* pseudo option */
386	{ ")",			TOK_ENDBRACE },		/* pseudo option */
387	{ NULL, 0 }	/* terminator */
388};
389
390void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
391static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
392    ipfw_cfg_lheader **pcfg, size_t *psize);
393static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
394    ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
395static void ipfw_list_tifaces(void);
396
397struct tidx;
398static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
399static uint16_t pack_table(struct tidx *tstate, char *name);
400
401static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
402static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
403static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
404    uint16_t type);
405
406/*
407 * Simple string buffer API.
408 * Used to simplify buffer passing between function and for
409 * transparent overrun handling.
410 */
411
412/*
413 * Allocates new buffer of given size @sz.
414 *
415 * Returns 0 on success.
416 */
417int
418bp_alloc(struct buf_pr *b, size_t size)
419{
420	memset(b, 0, sizeof(struct buf_pr));
421
422	if ((b->buf = calloc(1, size)) == NULL)
423		return (ENOMEM);
424
425	b->ptr = b->buf;
426	b->size = size;
427	b->avail = b->size;
428
429	return (0);
430}
431
432void
433bp_free(struct buf_pr *b)
434{
435
436	free(b->buf);
437}
438
439/*
440 * Flushes buffer so new writer start from beginning.
441 */
442void
443bp_flush(struct buf_pr *b)
444{
445
446	b->ptr = b->buf;
447	b->avail = b->size;
448	b->buf[0] = '\0';
449}
450
451/*
452 * Print message specified by @format and args.
453 * Automatically manage buffer space and transparently handle
454 * buffer overruns.
455 *
456 * Returns number of bytes that should have been printed.
457 */
458int
459bprintf(struct buf_pr *b, char *format, ...)
460{
461	va_list args;
462	int i;
463
464	va_start(args, format);
465
466	i = vsnprintf(b->ptr, b->avail, format, args);
467	va_end(args);
468
469	if (i > b->avail || i < 0) {
470		/* Overflow or print error */
471		b->avail = 0;
472	} else {
473		b->ptr += i;
474		b->avail -= i;
475	}
476
477	b->needed += i;
478
479	return (i);
480}
481
482/*
483 * Special values printer for tablearg-aware opcodes.
484 */
485void
486bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
487{
488
489	if (str != NULL)
490		bprintf(bp, "%s", str);
491	if (arg == IP_FW_TARG)
492		bprintf(bp, "tablearg");
493	else
494		bprintf(bp, "%u", arg);
495}
496
497/*
498 * Helper routine to print a possibly unaligned uint64_t on
499 * various platform. If width > 0, print the value with
500 * the desired width, followed by a space;
501 * otherwise, return the required width.
502 */
503int
504pr_u64(struct buf_pr *b, uint64_t *pd, int width)
505{
506#ifdef TCC
507#define U64_FMT "I64"
508#else
509#define U64_FMT "llu"
510#endif
511	uint64_t u;
512	unsigned long long d;
513
514	bcopy (pd, &u, sizeof(u));
515	d = u;
516	return (width > 0) ?
517		bprintf(b, "%*" U64_FMT " ", width, d) :
518		snprintf(NULL, 0, "%" U64_FMT, d) ;
519#undef U64_FMT
520}
521
522
523void *
524safe_calloc(size_t number, size_t size)
525{
526	void *ret = calloc(number, size);
527
528	if (ret == NULL)
529		err(EX_OSERR, "calloc");
530	return ret;
531}
532
533void *
534safe_realloc(void *ptr, size_t size)
535{
536	void *ret = realloc(ptr, size);
537
538	if (ret == NULL)
539		err(EX_OSERR, "realloc");
540	return ret;
541}
542
543/*
544 * Compare things like interface or table names.
545 */
546int
547stringnum_cmp(const char *a, const char *b)
548{
549	int la, lb;
550
551	la = strlen(a);
552	lb = strlen(b);
553
554	if (la > lb)
555		return (1);
556	else if (la < lb)
557		return (-01);
558
559	return (strcmp(a, b));
560}
561
562
563/*
564 * conditionally runs the command.
565 * Selected options or negative -> getsockopt
566 */
567int
568do_cmd(int optname, void *optval, uintptr_t optlen)
569{
570	int i;
571
572	if (co.test_only)
573		return 0;
574
575	if (ipfw_socket == -1)
576		ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
577	if (ipfw_socket < 0)
578		err(EX_UNAVAILABLE, "socket");
579
580	if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
581	    optname == IP_FW_ADD || optname == IP_FW3 ||
582	    optname == IP_FW_NAT_GET_CONFIG ||
583	    optname < 0 ||
584	    optname == IP_FW_NAT_GET_LOG) {
585		if (optname < 0)
586			optname = -optname;
587		i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
588			(socklen_t *)optlen);
589	} else {
590		i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
591	}
592	return i;
593}
594
595/*
596 * do_set3 - pass ipfw control cmd to kernel
597 * @optname: option name
598 * @optval: pointer to option data
599 * @optlen: option length
600 *
601 * Assumes op3 header is already embedded.
602 * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
603 * Returns 0 on success or errno otherwise.
604 */
605int
606do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
607{
608
609	if (co.test_only)
610		return (0);
611
612	if (ipfw_socket == -1)
613		ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
614	if (ipfw_socket < 0)
615		err(EX_UNAVAILABLE, "socket");
616
617	op3->opcode = optname;
618
619	return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
620}
621
622/*
623 * do_get3 - pass ipfw control cmd to kernel
624 * @optname: option name
625 * @optval: pointer to option data
626 * @optlen: pointer to option length
627 *
628 * Assumes op3 header is already embedded.
629 * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
630 * Returns 0 on success or errno otherwise.
631 */
632int
633do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
634{
635	int error;
636	socklen_t len;
637
638	if (co.test_only)
639		return (0);
640
641	if (ipfw_socket == -1)
642		ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
643	if (ipfw_socket < 0)
644		err(EX_UNAVAILABLE, "socket");
645
646	op3->opcode = optname;
647
648	len = *optlen;
649	error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
650	*optlen = len;
651
652	return (error);
653}
654
655/**
656 * match_token takes a table and a string, returns the value associated
657 * with the string (-1 in case of failure).
658 */
659int
660match_token(struct _s_x *table, const char *string)
661{
662	struct _s_x *pt;
663	uint i = strlen(string);
664
665	for (pt = table ; i && pt->s != NULL ; pt++)
666		if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
667			return pt->x;
668	return (-1);
669}
670
671/**
672 * match_token_relaxed takes a table and a string, returns the value associated
673 * with the string for the best match.
674 *
675 * Returns:
676 * value from @table for matched records
677 * -1 for non-matched records
678 * -2 if more than one records match @string.
679 */
680int
681match_token_relaxed(struct _s_x *table, const char *string)
682{
683	struct _s_x *pt, *m;
684	int i, c;
685
686	i = strlen(string);
687	c = 0;
688
689	for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
690		if (strncmp(pt->s, string, i) != 0)
691			continue;
692		m = pt;
693		c++;
694	}
695
696	if (c == 1)
697		return (m->x);
698
699	return (c > 0 ? -2: -1);
700}
701
702int
703get_token(struct _s_x *table, const char *string, const char *errbase)
704{
705	int tcmd;
706
707	if ((tcmd = match_token_relaxed(table, string)) < 0)
708		errx(EX_USAGE, "%s %s %s",
709		    (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
710
711	return (tcmd);
712}
713
714/**
715 * match_value takes a table and a value, returns the string associated
716 * with the value (NULL in case of failure).
717 */
718char const *
719match_value(struct _s_x *p, int value)
720{
721	for (; p->s != NULL; p++)
722		if (p->x == value)
723			return p->s;
724	return NULL;
725}
726
727size_t
728concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
729{
730	struct _s_x *pt;
731	int l;
732	size_t sz;
733
734	for (sz = 0, pt = table ; pt->s != NULL; pt++) {
735		l = snprintf(buf + sz, bufsize - sz, "%s%s",
736		    (sz == 0) ? "" : delimiter, pt->s);
737		sz += l;
738		bufsize += l;
739		if (sz > bufsize)
740			return (bufsize);
741	}
742
743	return (sz);
744}
745
746/*
747 * helper function to process a set of flags and set bits in the
748 * appropriate masks.
749 */
750int
751fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
752    uint32_t *clear)
753{
754	char *q;	/* points to the separator */
755	int val;
756	uint32_t *which;	/* mask we are working on */
757
758	while (p && *p) {
759		if (*p == '!') {
760			p++;
761			which = clear;
762		} else
763			which = set;
764		q = strchr(p, ',');
765		if (q)
766			*q++ = '\0';
767		val = match_token(flags, p);
768		if (val <= 0) {
769			if (e != NULL)
770				*e = p;
771			return (-1);
772		}
773		*which |= (uint32_t)val;
774		p = q;
775	}
776	return (0);
777}
778
779void
780print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
781{
782	char const *comma = "";
783	int i, l;
784
785	for (i = 0; list[i].x != 0; i++) {
786		if ((set & list[i].x) == 0)
787			continue;
788
789		set &= ~list[i].x;
790		l = snprintf(buf, sz, "%s%s", comma, list[i].s);
791		if (l >= sz)
792			return;
793		comma = ",";
794		buf += l;
795		sz -=l;
796	}
797}
798
799/*
800 * _substrcmp takes two strings and returns 1 if they do not match,
801 * and 0 if they match exactly or the first string is a sub-string
802 * of the second.  A warning is printed to stderr in the case that the
803 * first string is a sub-string of the second.
804 *
805 * This function will be removed in the future through the usual
806 * deprecation process.
807 */
808int
809_substrcmp(const char *str1, const char* str2)
810{
811
812	if (strncmp(str1, str2, strlen(str1)) != 0)
813		return 1;
814
815	if (strlen(str1) != strlen(str2))
816		warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
817		    str1, str2);
818	return 0;
819}
820
821/*
822 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
823 * and 0 if they match exactly or the second string is a sub-string
824 * of the first.  A warning is printed to stderr in the case that the
825 * first string does not match the third.
826 *
827 * This function exists to warn about the bizarre construction
828 * strncmp(str, "by", 2) which is used to allow people to use a shortcut
829 * for "bytes".  The problem is that in addition to accepting "by",
830 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
831 * other string beginning with "by".
832 *
833 * This function will be removed in the future through the usual
834 * deprecation process.
835 */
836int
837_substrcmp2(const char *str1, const char* str2, const char* str3)
838{
839
840	if (strncmp(str1, str2, strlen(str2)) != 0)
841		return 1;
842
843	if (strcmp(str1, str3) != 0)
844		warnx("DEPRECATED: '%s' matched '%s'",
845		    str1, str3);
846	return 0;
847}
848
849/*
850 * prints one port, symbolic or numeric
851 */
852static void
853print_port(struct buf_pr *bp, int proto, uint16_t port)
854{
855
856	if (proto == IPPROTO_ETHERTYPE) {
857		char const *s;
858
859		if (co.do_resolv && (s = match_value(ether_types, port)) )
860			bprintf(bp, "%s", s);
861		else
862			bprintf(bp, "0x%04x", port);
863	} else {
864		struct servent *se = NULL;
865		if (co.do_resolv) {
866			struct protoent *pe = getprotobynumber(proto);
867
868			se = getservbyport(htons(port), pe ? pe->p_name : NULL);
869		}
870		if (se)
871			bprintf(bp, "%s", se->s_name);
872		else
873			bprintf(bp, "%d", port);
874	}
875}
876
877static struct _s_x _port_name[] = {
878	{"dst-port",	O_IP_DSTPORT},
879	{"src-port",	O_IP_SRCPORT},
880	{"ipid",	O_IPID},
881	{"iplen",	O_IPLEN},
882	{"ipttl",	O_IPTTL},
883	{"mac-type",	O_MAC_TYPE},
884	{"tcpdatalen",	O_TCPDATALEN},
885	{"tcpmss",	O_TCPMSS},
886	{"tcpwin",	O_TCPWIN},
887	{"tagged",	O_TAGGED},
888	{NULL,		0}
889};
890
891/*
892 * Print the values in a list 16-bit items of the types above.
893 * XXX todo: add support for mask.
894 */
895static void
896print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
897{
898	uint16_t *p = cmd->ports;
899	int i;
900	char const *sep;
901
902	if (opcode != 0) {
903		sep = match_value(_port_name, opcode);
904		if (sep == NULL)
905			sep = "???";
906		bprintf(bp, " %s", sep);
907	}
908	sep = " ";
909	for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
910		bprintf(bp, "%s", sep);
911		print_port(bp, proto, p[0]);
912		if (p[0] != p[1]) {
913			bprintf(bp, "-");
914			print_port(bp, proto, p[1]);
915		}
916		sep = ",";
917	}
918}
919
920/*
921 * Like strtol, but also translates service names into port numbers
922 * for some protocols.
923 * In particular:
924 *	proto == -1 disables the protocol check;
925 *	proto == IPPROTO_ETHERTYPE looks up an internal table
926 *	proto == <some value in /etc/protocols> matches the values there.
927 * Returns *end == s in case the parameter is not found.
928 */
929static int
930strtoport(char *s, char **end, int base, int proto)
931{
932	char *p, *buf;
933	char *s1;
934	int i;
935
936	*end = s;		/* default - not found */
937	if (*s == '\0')
938		return 0;	/* not found */
939
940	if (isdigit(*s))
941		return strtol(s, end, base);
942
943	/*
944	 * find separator. '\\' escapes the next char.
945	 */
946	for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\' ||
947	    *s1 == '_' || *s1 == '.') ; s1++)
948		if (*s1 == '\\' && s1[1] != '\0')
949			s1++;
950
951	buf = safe_calloc(s1 - s + 1, 1);
952
953	/*
954	 * copy into a buffer skipping backslashes
955	 */
956	for (p = s, i = 0; p != s1 ; p++)
957		if (*p != '\\')
958			buf[i++] = *p;
959	buf[i++] = '\0';
960
961	if (proto == IPPROTO_ETHERTYPE) {
962		i = match_token(ether_types, buf);
963		free(buf);
964		if (i != -1) {	/* found */
965			*end = s1;
966			return i;
967		}
968	} else {
969		struct protoent *pe = NULL;
970		struct servent *se;
971
972		if (proto != 0)
973			pe = getprotobynumber(proto);
974		setservent(1);
975		se = getservbyname(buf, pe ? pe->p_name : NULL);
976		free(buf);
977		if (se != NULL) {
978			*end = s1;
979			return ntohs(se->s_port);
980		}
981	}
982	return 0;	/* not found */
983}
984
985/*
986 * Fill the body of the command with the list of port ranges.
987 */
988static int
989fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
990{
991	uint16_t a, b, *p = cmd->ports;
992	int i = 0;
993	char *s = av;
994
995	while (*s) {
996		a = strtoport(av, &s, 0, proto);
997		if (s == av) 			/* empty or invalid argument */
998			return (0);
999
1000		CHECK_LENGTH(cblen, i + 2);
1001
1002		switch (*s) {
1003		case '-':			/* a range */
1004			av = s + 1;
1005			b = strtoport(av, &s, 0, proto);
1006			/* Reject expressions like '1-abc' or '1-2-3'. */
1007			if (s == av || (*s != ',' && *s != '\0'))
1008				return (0);
1009			p[0] = a;
1010			p[1] = b;
1011			break;
1012		case ',':			/* comma separated list */
1013		case '\0':
1014			p[0] = p[1] = a;
1015			break;
1016		default:
1017			warnx("port list: invalid separator <%c> in <%s>",
1018				*s, av);
1019			return (0);
1020		}
1021
1022		i++;
1023		p += 2;
1024		av = s + 1;
1025	}
1026	if (i > 0) {
1027		if (i + 1 > F_LEN_MASK)
1028			errx(EX_DATAERR, "too many ports/ranges\n");
1029		cmd->o.len |= i + 1;	/* leave F_NOT and F_OR untouched */
1030	}
1031	return (i);
1032}
1033
1034/*
1035 * Fill the body of the command with the list of DiffServ codepoints.
1036 */
1037static void
1038fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1039{
1040	uint32_t *low, *high;
1041	char *s = av, *a;
1042	int code;
1043
1044	cmd->opcode = O_DSCP;
1045	cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1046
1047	CHECK_CMDLEN;
1048
1049	low = (uint32_t *)(cmd + 1);
1050	high = low + 1;
1051
1052	*low = 0;
1053	*high = 0;
1054
1055	while (s != NULL) {
1056		a = strchr(s, ',');
1057
1058		if (a != NULL)
1059			*a++ = '\0';
1060
1061		if (isalpha(*s)) {
1062			if ((code = match_token(f_ipdscp, s)) == -1)
1063				errx(EX_DATAERR, "Unknown DSCP code");
1064		} else {
1065			code = strtoul(s, NULL, 10);
1066			if (code < 0 || code > 63)
1067				errx(EX_DATAERR, "Invalid DSCP value");
1068		}
1069
1070		if (code >= 32)
1071			*high |= 1 << (code - 32);
1072		else
1073			*low |= 1 << code;
1074
1075		s = a;
1076	}
1077}
1078
1079static struct _s_x icmpcodes[] = {
1080      { "net",			ICMP_UNREACH_NET },
1081      { "host",			ICMP_UNREACH_HOST },
1082      { "protocol",		ICMP_UNREACH_PROTOCOL },
1083      { "port",			ICMP_UNREACH_PORT },
1084      { "needfrag",		ICMP_UNREACH_NEEDFRAG },
1085      { "srcfail",		ICMP_UNREACH_SRCFAIL },
1086      { "net-unknown",		ICMP_UNREACH_NET_UNKNOWN },
1087      { "host-unknown",		ICMP_UNREACH_HOST_UNKNOWN },
1088      { "isolated",		ICMP_UNREACH_ISOLATED },
1089      { "net-prohib",		ICMP_UNREACH_NET_PROHIB },
1090      { "host-prohib",		ICMP_UNREACH_HOST_PROHIB },
1091      { "tosnet",		ICMP_UNREACH_TOSNET },
1092      { "toshost",		ICMP_UNREACH_TOSHOST },
1093      { "filter-prohib",	ICMP_UNREACH_FILTER_PROHIB },
1094      { "host-precedence",	ICMP_UNREACH_HOST_PRECEDENCE },
1095      { "precedence-cutoff",	ICMP_UNREACH_PRECEDENCE_CUTOFF },
1096      { NULL, 0 }
1097};
1098
1099static void
1100fill_reject_code(u_short *codep, char *str)
1101{
1102	int val;
1103	char *s;
1104
1105	val = strtoul(str, &s, 0);
1106	if (s == str || *s != '\0' || val >= 0x100)
1107		val = match_token(icmpcodes, str);
1108	if (val < 0)
1109		errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1110	*codep = val;
1111	return;
1112}
1113
1114static void
1115print_reject_code(struct buf_pr *bp, uint16_t code)
1116{
1117	char const *s;
1118
1119	if ((s = match_value(icmpcodes, code)) != NULL)
1120		bprintf(bp, "unreach %s", s);
1121	else
1122		bprintf(bp, "unreach %u", code);
1123}
1124
1125/*
1126 * Returns the number of bits set (from left) in a contiguous bitmask,
1127 * or -1 if the mask is not contiguous.
1128 * XXX this needs a proper fix.
1129 * This effectively works on masks in big-endian (network) format.
1130 * when compiled on little endian architectures.
1131 *
1132 * First bit is bit 7 of the first byte -- note, for MAC addresses,
1133 * the first bit on the wire is bit 0 of the first byte.
1134 * len is the max length in bits.
1135 */
1136int
1137contigmask(uint8_t *p, int len)
1138{
1139	int i, n;
1140
1141	for (i=0; i<len ; i++)
1142		if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1143			break;
1144	for (n=i+1; n < len; n++)
1145		if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1146			return -1; /* mask not contiguous */
1147	return i;
1148}
1149
1150/*
1151 * print flags set/clear in the two bitmasks passed as parameters.
1152 * There is a specialized check for f_tcpflags.
1153 */
1154static void
1155print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1156    struct _s_x *list)
1157{
1158	char const *comma = "";
1159	int i;
1160	uint8_t set = cmd->arg1 & 0xff;
1161	uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1162
1163	if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1164		bprintf(bp, " setup");
1165		return;
1166	}
1167
1168	bprintf(bp, " %s ", name);
1169	for (i=0; list[i].x != 0; i++) {
1170		if (set & list[i].x) {
1171			set &= ~list[i].x;
1172			bprintf(bp, "%s%s", comma, list[i].s);
1173			comma = ",";
1174		}
1175		if (clear & list[i].x) {
1176			clear &= ~list[i].x;
1177			bprintf(bp, "%s!%s", comma, list[i].s);
1178			comma = ",";
1179		}
1180	}
1181}
1182
1183
1184/*
1185 * Print the ip address contained in a command.
1186 */
1187static void
1188print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1189{
1190	struct hostent *he = NULL;
1191	struct in_addr *ia;
1192	uint32_t len = F_LEN((ipfw_insn *)cmd);
1193	uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1194	char *t;
1195
1196	bprintf(bp, " ");
1197	if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1198		uint32_t d = a[1];
1199		const char *arg = "<invalid>";
1200
1201		if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1202			arg = match_value(rule_options, lookup_key[d]);
1203		t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1204		bprintf(bp, "lookup %s %s", arg, t);
1205		return;
1206	}
1207	if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1208		bprintf(bp, "me");
1209		return;
1210	}
1211	if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1212	    cmd->o.opcode == O_IP_DST_LOOKUP) {
1213		t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1214		bprintf(bp, "table(%s", t);
1215		if (len == F_INSN_SIZE(ipfw_insn_u32))
1216			bprintf(bp, ",%u", *a);
1217		bprintf(bp, ")");
1218		return;
1219	}
1220	if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1221		uint32_t x, *map = (uint32_t *)&(cmd->mask);
1222		int i, j;
1223		char comma = '{';
1224
1225		x = cmd->o.arg1 - 1;
1226		x = htonl( ~x );
1227		cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1228		bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1229			contigmask((uint8_t *)&x, 32));
1230		x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1231		x &= 0xff; /* base */
1232		/*
1233		 * Print bits and ranges.
1234		 * Locate first bit set (i), then locate first bit unset (j).
1235		 * If we have 3+ consecutive bits set, then print them as a
1236		 * range, otherwise only print the initial bit and rescan.
1237		 */
1238		for (i=0; i < cmd->o.arg1; i++)
1239			if (map[i/32] & (1<<(i & 31))) {
1240				for (j=i+1; j < cmd->o.arg1; j++)
1241					if (!(map[ j/32] & (1<<(j & 31))))
1242						break;
1243				bprintf(bp, "%c%d", comma, i+x);
1244				if (j>i+2) { /* range has at least 3 elements */
1245					bprintf(bp, "-%d", j-1+x);
1246					i = j-1;
1247				}
1248				comma = ',';
1249			}
1250		bprintf(bp, "}");
1251		return;
1252	}
1253	/*
1254	 * len == 2 indicates a single IP, whereas lists of 1 or more
1255	 * addr/mask pairs have len = (2n+1). We convert len to n so we
1256	 * use that to count the number of entries.
1257	 */
1258    for (len = len / 2; len > 0; len--, a += 2) {
1259	int mb =	/* mask length */
1260	    (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1261		32 : contigmask((uint8_t *)&(a[1]), 32);
1262	if (mb == 32 && co.do_resolv)
1263		he = gethostbyaddr((char *)&(a[0]), sizeof(in_addr_t),
1264		    AF_INET);
1265	if (he != NULL)		/* resolved to name */
1266		bprintf(bp, "%s", he->h_name);
1267	else if (mb == 0)	/* any */
1268		bprintf(bp, "any");
1269	else {		/* numeric IP followed by some kind of mask */
1270		ia = (struct in_addr *)&a[0];
1271		bprintf(bp, "%s", inet_ntoa(*ia));
1272		if (mb < 0) {
1273			ia = (struct in_addr *)&a[1];
1274			bprintf(bp, ":%s", inet_ntoa(*ia));
1275		} else if (mb < 32)
1276			bprintf(bp, "/%d", mb);
1277	}
1278	if (len > 1)
1279		bprintf(bp, ",");
1280    }
1281}
1282
1283/*
1284 * prints a MAC address/mask pair
1285 */
1286static void
1287format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1288{
1289	int l = contigmask(mask, 48);
1290
1291	if (l == 0)
1292		bprintf(bp, " any");
1293	else {
1294		bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1295		    addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1296		if (l == -1)
1297			bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1298			    mask[0], mask[1], mask[2],
1299			    mask[3], mask[4], mask[5]);
1300		else if (l < 48)
1301			bprintf(bp, "/%d", l);
1302	}
1303}
1304
1305static void
1306print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1307{
1308
1309	bprintf(bp, " MAC");
1310	format_mac(bp, mac->addr, mac->mask);
1311	format_mac(bp, mac->addr + 6, mac->mask + 6);
1312}
1313
1314static void
1315fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1316{
1317	uint8_t type;
1318
1319	cmd->d[0] = 0;
1320	while (*av) {
1321		if (*av == ',')
1322			av++;
1323
1324		type = strtoul(av, &av, 0);
1325
1326		if (*av != ',' && *av != '\0')
1327			errx(EX_DATAERR, "invalid ICMP type");
1328
1329		if (type > 31)
1330			errx(EX_DATAERR, "ICMP type out of range");
1331
1332		cmd->d[0] |= 1 << type;
1333	}
1334	cmd->o.opcode = O_ICMPTYPE;
1335	cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1336}
1337
1338static void
1339print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1340{
1341	int i;
1342	char sep= ' ';
1343
1344	bprintf(bp, " icmptypes");
1345	for (i = 0; i < 32; i++) {
1346		if ( (cmd->d[0] & (1 << (i))) == 0)
1347			continue;
1348		bprintf(bp, "%c%d", sep, i);
1349		sep = ',';
1350	}
1351}
1352
1353static void
1354print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1355{
1356	int i = 0;
1357	uint32_t *v;
1358	char sep= ' ';
1359	const char *code;
1360
1361	bprintf(bp, " dscp");
1362	v = cmd->d;
1363	while (i < 64) {
1364		if (*v & (1 << i)) {
1365			if ((code = match_value(f_ipdscp, i)) != NULL)
1366				bprintf(bp, "%c%s", sep, code);
1367			else
1368				bprintf(bp, "%c%d", sep, i);
1369			sep = ',';
1370		}
1371
1372		if ((++i % 32) == 0)
1373			v++;
1374	}
1375}
1376
1377#define	insntod(cmd, type)	((ipfw_insn_ ## type *)(cmd))
1378struct show_state {
1379	struct ip_fw_rule	*rule;
1380	const ipfw_insn		*eaction;
1381	uint8_t			*printed;
1382	int			flags;
1383#define	HAVE_PROTO		0x0001
1384#define	HAVE_SRCIP		0x0002
1385#define	HAVE_DSTIP		0x0004
1386#define	HAVE_PROBE_STATE	0x0008
1387	int			proto;
1388	int			or_block;
1389};
1390
1391static int
1392init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1393{
1394
1395	state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1396	if (state->printed == NULL)
1397		return (ENOMEM);
1398	state->rule = rule;
1399	state->eaction = NULL;
1400	state->flags = 0;
1401	state->proto = 0;
1402	state->or_block = 0;
1403	return (0);
1404}
1405
1406static void
1407free_show_state(struct show_state *state)
1408{
1409
1410	free(state->printed);
1411}
1412
1413static uint8_t
1414is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1415{
1416
1417	return (state->printed[cmd - state->rule->cmd]);
1418}
1419
1420static void
1421mark_printed(struct show_state *state, const ipfw_insn *cmd)
1422{
1423
1424	state->printed[cmd - state->rule->cmd] = 1;
1425}
1426
1427static void
1428print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1429{
1430	struct _s_x *p = limit_masks;
1431	char const *comma = " ";
1432	uint8_t x;
1433
1434	for (x = limit->limit_mask; p->x != 0; p++) {
1435		if ((x & p->x) == p->x) {
1436			x &= ~p->x;
1437			bprintf(bp, "%s%s", comma, p->s);
1438			comma = ",";
1439		}
1440	}
1441	bprint_uint_arg(bp, " ", limit->conn_limit);
1442}
1443
1444static int
1445print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1446    struct show_state *state, ipfw_insn *cmd)
1447{
1448	struct protoent *pe;
1449	struct passwd *pwd;
1450	struct group *grp;
1451	const char *s;
1452	double d;
1453
1454	if (is_printed_opcode(state, cmd))
1455		return (0);
1456	if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1457		bprintf(bp, " {");
1458	if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1459		bprintf(bp, " not");
1460
1461	switch (cmd->opcode) {
1462	case O_PROB:
1463		d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1464		bprintf(bp, "prob %f ", d);
1465		break;
1466	case O_PROBE_STATE: /* no need to print anything here */
1467		state->flags |= HAVE_PROBE_STATE;
1468		break;
1469	case O_IP_SRC:
1470	case O_IP_SRC_LOOKUP:
1471	case O_IP_SRC_MASK:
1472	case O_IP_SRC_ME:
1473	case O_IP_SRC_SET:
1474		if (state->flags & HAVE_SRCIP)
1475			bprintf(bp, " src-ip");
1476		print_ip(bp, fo, insntod(cmd, ip));
1477		break;
1478	case O_IP_DST:
1479	case O_IP_DST_LOOKUP:
1480	case O_IP_DST_MASK:
1481	case O_IP_DST_ME:
1482	case O_IP_DST_SET:
1483		if (state->flags & HAVE_DSTIP)
1484			bprintf(bp, " dst-ip");
1485		print_ip(bp, fo, insntod(cmd, ip));
1486		break;
1487	case O_IP6_SRC:
1488	case O_IP6_SRC_MASK:
1489	case O_IP6_SRC_ME:
1490		if (state->flags & HAVE_SRCIP)
1491			bprintf(bp, " src-ip6");
1492		print_ip6(bp, insntod(cmd, ip6));
1493		break;
1494	case O_IP6_DST:
1495	case O_IP6_DST_MASK:
1496	case O_IP6_DST_ME:
1497		if (state->flags & HAVE_DSTIP)
1498			bprintf(bp, " dst-ip6");
1499		print_ip6(bp, insntod(cmd, ip6));
1500		break;
1501	case O_FLOW6ID:
1502		print_flow6id(bp, insntod(cmd, u32));
1503		break;
1504	case O_IP_DSTPORT:
1505	case O_IP_SRCPORT:
1506		print_newports(bp, insntod(cmd, u16), state->proto,
1507		    (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1508		    (HAVE_SRCIP | HAVE_DSTIP) ?  cmd->opcode: 0);
1509		break;
1510	case O_PROTO:
1511		pe = getprotobynumber(cmd->arg1);
1512		if (state->flags & HAVE_PROTO)
1513			bprintf(bp, " proto");
1514		if (pe != NULL)
1515			bprintf(bp, " %s", pe->p_name);
1516		else
1517			bprintf(bp, " %u", cmd->arg1);
1518		state->proto = cmd->arg1;
1519		break;
1520	case O_MACADDR2:
1521		print_mac(bp, insntod(cmd, mac));
1522		break;
1523	case O_MAC_TYPE:
1524		print_newports(bp, insntod(cmd, u16),
1525		    IPPROTO_ETHERTYPE, cmd->opcode);
1526		break;
1527	case O_FRAG:
1528		bprintf(bp, " frag");
1529		break;
1530	case O_FIB:
1531		bprintf(bp, " fib %u", cmd->arg1);
1532		break;
1533	case O_SOCKARG:
1534		bprintf(bp, " sockarg");
1535		break;
1536	case O_IN:
1537		bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1538		break;
1539	case O_DIVERTED:
1540		switch (cmd->arg1) {
1541		case 3:
1542			bprintf(bp, " diverted");
1543			break;
1544		case 2:
1545			bprintf(bp, " diverted-output");
1546			break;
1547		case 1:
1548			bprintf(bp, " diverted-loopback");
1549			break;
1550		default:
1551			bprintf(bp, " diverted-?<%u>", cmd->arg1);
1552			break;
1553		}
1554		break;
1555	case O_LAYER2:
1556		bprintf(bp, " layer2");
1557		break;
1558	case O_XMIT:
1559	case O_RECV:
1560	case O_VIA:
1561		if (cmd->opcode == O_XMIT)
1562			s = "xmit";
1563		else if (cmd->opcode == O_RECV)
1564			s = "recv";
1565		else /* if (cmd->opcode == O_VIA) */
1566			s = "via";
1567		switch (insntod(cmd, if)->name[0]) {
1568		case '\0':
1569			bprintf(bp, " %s %s", s,
1570			    inet_ntoa(insntod(cmd, if)->p.ip));
1571			break;
1572		case '\1':
1573			bprintf(bp, " %s table(%s)", s,
1574			    table_search_ctlv(fo->tstate,
1575			    insntod(cmd, if)->p.kidx));
1576			break;
1577		default:
1578			bprintf(bp, " %s %s", s,
1579			    insntod(cmd, if)->name);
1580		}
1581		break;
1582	case O_IP_FLOW_LOOKUP:
1583		s = table_search_ctlv(fo->tstate, cmd->arg1);
1584		bprintf(bp, " flow table(%s", s);
1585		if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1586			bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1587		bprintf(bp, ")");
1588		break;
1589	case O_IPID:
1590	case O_IPTTL:
1591	case O_IPLEN:
1592	case O_TCPDATALEN:
1593	case O_TCPMSS:
1594	case O_TCPWIN:
1595		if (F_LEN(cmd) == 1) {
1596			switch (cmd->opcode) {
1597			case O_IPID:
1598				s = "ipid";
1599				break;
1600			case O_IPTTL:
1601				s = "ipttl";
1602				break;
1603			case O_IPLEN:
1604				s = "iplen";
1605				break;
1606			case O_TCPDATALEN:
1607				s = "tcpdatalen";
1608				break;
1609			case O_TCPMSS:
1610				s = "tcpmss";
1611				break;
1612			case O_TCPWIN:
1613				s = "tcpwin";
1614				break;
1615			}
1616			bprintf(bp, " %s %u", s, cmd->arg1);
1617		} else
1618			print_newports(bp, insntod(cmd, u16), 0,
1619			    cmd->opcode);
1620		break;
1621	case O_IPVER:
1622		bprintf(bp, " ipver %u", cmd->arg1);
1623		break;
1624	case O_IPPRECEDENCE:
1625		bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1626		break;
1627	case O_DSCP:
1628		print_dscp(bp, insntod(cmd, u32));
1629		break;
1630	case O_IPOPT:
1631		print_flags(bp, "ipoptions", cmd, f_ipopts);
1632		break;
1633	case O_IPTOS:
1634		print_flags(bp, "iptos", cmd, f_iptos);
1635		break;
1636	case O_ICMPTYPE:
1637		print_icmptypes(bp, insntod(cmd, u32));
1638		break;
1639	case O_ESTAB:
1640		bprintf(bp, " established");
1641		break;
1642	case O_TCPFLAGS:
1643		print_flags(bp, "tcpflags", cmd, f_tcpflags);
1644		break;
1645	case O_TCPOPTS:
1646		print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1647		break;
1648	case O_TCPACK:
1649		bprintf(bp, " tcpack %d",
1650		    ntohl(insntod(cmd, u32)->d[0]));
1651		break;
1652	case O_TCPSEQ:
1653		bprintf(bp, " tcpseq %d",
1654		    ntohl(insntod(cmd, u32)->d[0]));
1655		break;
1656	case O_UID:
1657		pwd = getpwuid(insntod(cmd, u32)->d[0]);
1658		if (pwd != NULL)
1659			bprintf(bp, " uid %s", pwd->pw_name);
1660		else
1661			bprintf(bp, " uid %u",
1662			    insntod(cmd, u32)->d[0]);
1663		break;
1664	case O_GID:
1665		grp = getgrgid(insntod(cmd, u32)->d[0]);
1666		if (grp != NULL)
1667			bprintf(bp, " gid %s", grp->gr_name);
1668		else
1669			bprintf(bp, " gid %u",
1670			    insntod(cmd, u32)->d[0]);
1671		break;
1672	case O_JAIL:
1673		bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1674		break;
1675	case O_VERREVPATH:
1676		bprintf(bp, " verrevpath");
1677		break;
1678	case O_VERSRCREACH:
1679		bprintf(bp, " versrcreach");
1680		break;
1681	case O_ANTISPOOF:
1682		bprintf(bp, " antispoof");
1683		break;
1684	case O_IPSEC:
1685		bprintf(bp, " ipsec");
1686		break;
1687	case O_NOP:
1688		bprintf(bp, " // %s", (char *)(cmd + 1));
1689		break;
1690	case O_KEEP_STATE:
1691		if (state->flags & HAVE_PROBE_STATE)
1692			bprintf(bp, " keep-state");
1693		else
1694			bprintf(bp, " record-state");
1695		bprintf(bp, " :%s",
1696		    object_search_ctlv(fo->tstate, cmd->arg1,
1697		    IPFW_TLV_STATE_NAME));
1698		break;
1699	case O_LIMIT:
1700		if (state->flags & HAVE_PROBE_STATE)
1701			bprintf(bp, " limit");
1702		else
1703			bprintf(bp, " set-limit");
1704		print_limit_mask(bp, insntod(cmd, limit));
1705		bprintf(bp, " :%s",
1706		    object_search_ctlv(fo->tstate, cmd->arg1,
1707		    IPFW_TLV_STATE_NAME));
1708		break;
1709	case O_IP6:
1710		if (state->flags & HAVE_PROTO)
1711			bprintf(bp, " proto");
1712		bprintf(bp, " ip6");
1713		break;
1714	case O_IP4:
1715		if (state->flags & HAVE_PROTO)
1716			bprintf(bp, " proto");
1717		bprintf(bp, " ip4");
1718		break;
1719	case O_ICMP6TYPE:
1720		print_icmp6types(bp, insntod(cmd, u32));
1721		break;
1722	case O_EXT_HDR:
1723		print_ext6hdr(bp, cmd);
1724		break;
1725	case O_TAGGED:
1726		if (F_LEN(cmd) == 1)
1727			bprint_uint_arg(bp, " tagged ", cmd->arg1);
1728		else
1729			print_newports(bp, insntod(cmd, u16),
1730				    0, O_TAGGED);
1731		break;
1732	case O_SKIP_ACTION:
1733		bprintf(bp, " defer-immediate-action");
1734		break;
1735	default:
1736		bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1737		    cmd->len);
1738	}
1739	if (cmd->len & F_OR) {
1740		bprintf(bp, " or");
1741		state->or_block = 1;
1742	} else if (state->or_block != 0) {
1743		bprintf(bp, " }");
1744		state->or_block = 0;
1745	}
1746	mark_printed(state, cmd);
1747
1748	return (1);
1749}
1750
1751static ipfw_insn *
1752print_opcode(struct buf_pr *bp, struct format_opts *fo,
1753    struct show_state *state, int opcode)
1754{
1755	ipfw_insn *cmd;
1756	int l;
1757
1758	for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1759	    l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1760		/* We use zero opcode to print the rest of options */
1761		if (opcode >= 0 && cmd->opcode != opcode)
1762			continue;
1763		/*
1764		 * Skip O_NOP, when we printing the rest
1765		 * of options, it will be handled separately.
1766		 */
1767		if (cmd->opcode == O_NOP && opcode != O_NOP)
1768			continue;
1769		if (!print_instruction(bp, fo, state, cmd))
1770			continue;
1771		return (cmd);
1772	}
1773	return (NULL);
1774}
1775
1776static void
1777print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1778{
1779	char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1780	ipfw_insn_sa6 *sa6;
1781	ipfw_insn_sa *sa;
1782	uint16_t port;
1783
1784	if (cmd->opcode == O_FORWARD_IP) {
1785		sa = insntod(cmd, sa);
1786		port = sa->sa.sin_port;
1787		if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1788			bprintf(bp, "fwd tablearg");
1789		else
1790			bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1791	} else {
1792		sa6 = insntod(cmd, sa6);
1793		port = sa6->sa.sin6_port;
1794		bprintf(bp, "fwd ");
1795		if (getnameinfo((const struct sockaddr *)&sa6->sa,
1796		    sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1797		    NI_NUMERICHOST) == 0)
1798			bprintf(bp, "%s", buf);
1799	}
1800	if (port != 0)
1801		bprintf(bp, ",%u", port);
1802}
1803
1804static int
1805print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1806    struct show_state *state, const ipfw_insn *cmd)
1807{
1808	const char *s;
1809
1810	if (is_printed_opcode(state, cmd))
1811		return (0);
1812	switch (cmd->opcode) {
1813	case O_CHECK_STATE:
1814		bprintf(bp, "check-state");
1815		if (cmd->arg1 != 0)
1816			s = object_search_ctlv(fo->tstate, cmd->arg1,
1817			    IPFW_TLV_STATE_NAME);
1818		else
1819			s = NULL;
1820		bprintf(bp, " :%s", s ? s: "any");
1821		break;
1822	case O_ACCEPT:
1823		bprintf(bp, "allow");
1824		break;
1825	case O_COUNT:
1826		bprintf(bp, "count");
1827		break;
1828	case O_DENY:
1829		bprintf(bp, "deny");
1830		break;
1831	case O_REJECT:
1832		if (cmd->arg1 == ICMP_REJECT_RST)
1833			bprintf(bp, "reset");
1834		else if (cmd->arg1 == ICMP_REJECT_ABORT)
1835			bprintf(bp, "abort");
1836		else if (cmd->arg1 == ICMP_UNREACH_HOST)
1837			bprintf(bp, "reject");
1838		else
1839			print_reject_code(bp, cmd->arg1);
1840		break;
1841	case O_UNREACH6:
1842		if (cmd->arg1 == ICMP6_UNREACH_RST)
1843			bprintf(bp, "reset6");
1844		else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1845			bprintf(bp, "abort6");
1846		else
1847			print_unreach6_code(bp, cmd->arg1);
1848		break;
1849	case O_SKIPTO:
1850		bprint_uint_arg(bp, "skipto ", cmd->arg1);
1851		break;
1852	case O_PIPE:
1853		bprint_uint_arg(bp, "pipe ", cmd->arg1);
1854		break;
1855	case O_QUEUE:
1856		bprint_uint_arg(bp, "queue ", cmd->arg1);
1857		break;
1858	case O_DIVERT:
1859		bprint_uint_arg(bp, "divert ", cmd->arg1);
1860		break;
1861	case O_TEE:
1862		bprint_uint_arg(bp, "tee ", cmd->arg1);
1863		break;
1864	case O_NETGRAPH:
1865		bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1866		break;
1867	case O_NGTEE:
1868		bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1869		break;
1870	case O_FORWARD_IP:
1871	case O_FORWARD_IP6:
1872		print_fwd(bp, cmd);
1873		break;
1874	case O_LOG:
1875		if (insntod(cmd, log)->max_log > 0)
1876			bprintf(bp, " log logamount %d",
1877			    insntod(cmd, log)->max_log);
1878		else
1879			bprintf(bp, " log");
1880		break;
1881	case O_ALTQ:
1882#ifndef NO_ALTQ
1883		print_altq_cmd(bp, insntod(cmd, altq));
1884#endif
1885		break;
1886	case O_TAG:
1887		bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1888		    " tag ", cmd->arg1);
1889		break;
1890	case O_NAT:
1891		if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1892			bprint_uint_arg(bp, "nat ", cmd->arg1);
1893		else
1894			bprintf(bp, "nat global");
1895		break;
1896	case O_SETFIB:
1897		if (cmd->arg1 == IP_FW_TARG)
1898			bprint_uint_arg(bp, "setfib ", cmd->arg1);
1899		else
1900			bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1901		break;
1902	case O_EXTERNAL_ACTION:
1903		/*
1904		 * The external action can consists of two following
1905		 * each other opcodes - O_EXTERNAL_ACTION and
1906		 * O_EXTERNAL_INSTANCE. The first contains the ID of
1907		 * name of external action. The second contains the ID
1908		 * of name of external action instance.
1909		 * NOTE: in case when external action has no named
1910		 * instances support, the second opcode isn't needed.
1911		 */
1912		state->eaction = cmd;
1913		s = object_search_ctlv(fo->tstate, cmd->arg1,
1914		    IPFW_TLV_EACTION);
1915		if (match_token(rule_eactions, s) != -1)
1916			bprintf(bp, "%s", s);
1917		else
1918			bprintf(bp, "eaction %s", s);
1919		break;
1920	case O_EXTERNAL_INSTANCE:
1921		if (state->eaction == NULL)
1922			break;
1923		/*
1924		 * XXX: we need to teach ipfw(9) to rewrite opcodes
1925		 * in the user buffer on rule addition. When we add
1926		 * the rule, we specify zero TLV type for
1927		 * O_EXTERNAL_INSTANCE object. To show correct
1928		 * rule after `ipfw add` we need to search instance
1929		 * name with zero type. But when we do `ipfw show`
1930		 * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1931		 * macro.
1932		 */
1933		s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1934		if (s == NULL)
1935			s = object_search_ctlv(fo->tstate,
1936			    cmd->arg1, IPFW_TLV_EACTION_NAME(
1937			    state->eaction->arg1));
1938		bprintf(bp, " %s", s);
1939		break;
1940	case O_EXTERNAL_DATA:
1941		if (state->eaction == NULL)
1942			break;
1943		/*
1944		 * Currently we support data formatting only for
1945		 * external data with datalen u16. For unknown data
1946		 * print its size in bytes.
1947		 */
1948		if (cmd->len == F_INSN_SIZE(ipfw_insn))
1949			bprintf(bp, " %u", cmd->arg1);
1950		else
1951			bprintf(bp, " %ubytes",
1952			    cmd->len * sizeof(uint32_t));
1953		break;
1954	case O_SETDSCP:
1955		if (cmd->arg1 == IP_FW_TARG) {
1956			bprintf(bp, "setdscp tablearg");
1957			break;
1958		}
1959		s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1960		if (s != NULL)
1961			bprintf(bp, "setdscp %s", s);
1962		else
1963			bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
1964		break;
1965	case O_REASS:
1966		bprintf(bp, "reass");
1967		break;
1968	case O_CALLRETURN:
1969		if (cmd->len & F_NOT)
1970			bprintf(bp, "return");
1971		else
1972			bprint_uint_arg(bp, "call ", cmd->arg1);
1973		break;
1974	default:
1975		bprintf(bp, "** unrecognized action %d len %d ",
1976			cmd->opcode, cmd->len);
1977	}
1978	mark_printed(state, cmd);
1979
1980	return (1);
1981}
1982
1983
1984static ipfw_insn *
1985print_action(struct buf_pr *bp, struct format_opts *fo,
1986    struct show_state *state, uint8_t opcode)
1987{
1988	ipfw_insn *cmd;
1989	int l;
1990
1991	for (l = state->rule->cmd_len - state->rule->act_ofs,
1992	    cmd = ACTION_PTR(state->rule); l > 0;
1993	    l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1994		if (cmd->opcode != opcode)
1995			continue;
1996		if (!print_action_instruction(bp, fo, state, cmd))
1997			continue;
1998		return (cmd);
1999	}
2000	return (NULL);
2001}
2002
2003static void
2004print_proto(struct buf_pr *bp, struct format_opts *fo,
2005    struct show_state *state)
2006{
2007	ipfw_insn *cmd;
2008	int l, proto, ip4, ip6;
2009
2010	/* Count all O_PROTO, O_IP4, O_IP6 instructions. */
2011	proto = ip4 = ip6 = 0;
2012	for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2013	    l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2014		switch (cmd->opcode) {
2015		case O_PROTO:
2016			proto++;
2017			break;
2018		case O_IP4:
2019			ip4 = 1;
2020			if (cmd->len & F_OR)
2021				ip4++;
2022			break;
2023		case O_IP6:
2024			ip6 = 1;
2025			if (cmd->len & F_OR)
2026				ip6++;
2027			break;
2028		default:
2029			continue;
2030		}
2031	}
2032	if (proto == 0 && ip4 == 0 && ip6 == 0) {
2033		state->proto = IPPROTO_IP;
2034		state->flags |= HAVE_PROTO;
2035		bprintf(bp, " ip");
2036		return;
2037	}
2038	/* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2039	cmd = NULL;
2040	if (ip4 || ip6)
2041		cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2042	if (cmd != NULL && (cmd->len & F_OR))
2043		cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2044	if (cmd == NULL || (cmd->len & F_OR))
2045		for (l = proto; l > 0; l--) {
2046			cmd = print_opcode(bp, fo, state, O_PROTO);
2047			if (cmd == NULL || (cmd->len & F_OR) == 0)
2048				break;
2049		}
2050	/* Initialize proto, it is used by print_newports() */
2051	state->flags |= HAVE_PROTO;
2052	if (state->proto == 0 && ip6 != 0)
2053		state->proto = IPPROTO_IPV6;
2054}
2055
2056static int
2057match_opcode(int opcode, const int opcodes[], size_t nops)
2058{
2059	int i;
2060
2061	for (i = 0; i < nops; i++)
2062		if (opcode == opcodes[i])
2063			return (1);
2064	return (0);
2065}
2066
2067static void
2068print_address(struct buf_pr *bp, struct format_opts *fo,
2069    struct show_state *state, const int opcodes[], size_t nops, int portop,
2070    int flag)
2071{
2072	ipfw_insn *cmd;
2073	int count, l, portcnt, pf;
2074
2075	count = portcnt = 0;
2076	for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2077	    l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2078		if (match_opcode(cmd->opcode, opcodes, nops))
2079			count++;
2080		else if (cmd->opcode == portop)
2081			portcnt++;
2082	}
2083	if (count == 0)
2084		bprintf(bp, " any");
2085	for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2086	    l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2087		if (!match_opcode(cmd->opcode, opcodes, nops))
2088			continue;
2089		print_instruction(bp, fo, state, cmd);
2090		if ((cmd->len & F_OR) == 0)
2091			break;
2092		count--;
2093	}
2094	/*
2095	 * If several O_IP_?PORT opcodes specified, leave them to the
2096	 * options section.
2097	 */
2098	if (portcnt == 1) {
2099		for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2100		    l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2101			if (cmd->opcode != portop) {
2102				pf = (cmd->len & F_OR);
2103				continue;
2104			}
2105			/* Print opcode iff it is not in OR block. */
2106			if (pf == 0 && (cmd->len & F_OR) == 0)
2107				print_instruction(bp, fo, state, cmd);
2108			break;
2109		}
2110	}
2111	state->flags |= flag;
2112}
2113
2114static const int action_opcodes[] = {
2115	O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2116	O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2117	O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2118	O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2119	/* keep the following opcodes at the end of the list */
2120	O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2121};
2122
2123static const int modifier_opcodes[] = {
2124	O_LOG, O_ALTQ, O_TAG
2125};
2126
2127static const int src_opcodes[] = {
2128	O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2129	O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2130};
2131
2132static const int dst_opcodes[] = {
2133	O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2134	O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2135};
2136
2137static void
2138show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2139    struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2140{
2141	struct show_state state;
2142	ipfw_insn *cmd;
2143	static int twidth = 0;
2144	int i;
2145
2146	/* Print # DISABLED or skip the rule */
2147	if ((fo->set_mask & (1 << rule->set)) == 0) {
2148		/* disabled mask */
2149		if (!co->show_sets)
2150			return;
2151		else
2152			bprintf(bp, "# DISABLED ");
2153	}
2154	if (init_show_state(&state, rule) != 0) {
2155		warn("init_show_state() failed");
2156		return;
2157	}
2158	bprintf(bp, "%05u ", rule->rulenum);
2159
2160	/* Print counters if enabled */
2161	if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2162		pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2163		pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2164	}
2165
2166	/* Print timestamp */
2167	if (co->do_time == TIMESTAMP_NUMERIC)
2168		bprintf(bp, "%10u ", cntr->timestamp);
2169	else if (co->do_time == TIMESTAMP_STRING) {
2170		char timestr[30];
2171		time_t t = (time_t)0;
2172
2173		if (twidth == 0) {
2174			strcpy(timestr, ctime(&t));
2175			*strchr(timestr, '\n') = '\0';
2176			twidth = strlen(timestr);
2177		}
2178		if (cntr->timestamp > 0) {
2179			t = _long_to_time(cntr->timestamp);
2180
2181			strcpy(timestr, ctime(&t));
2182			*strchr(timestr, '\n') = '\0';
2183			bprintf(bp, "%s ", timestr);
2184		} else {
2185			bprintf(bp, "%*s", twidth, " ");
2186		}
2187	}
2188
2189	/* Print set number */
2190	if (co->show_sets)
2191		bprintf(bp, "set %d ", rule->set);
2192
2193	/* Print the optional "match probability" */
2194	cmd = print_opcode(bp, fo, &state, O_PROB);
2195	/* Print rule action */
2196	for (i = 0; i < nitems(action_opcodes); i++) {
2197		cmd = print_action(bp, fo, &state, action_opcodes[i]);
2198		if (cmd == NULL)
2199			continue;
2200		/* Handle special cases */
2201		switch (cmd->opcode) {
2202		case O_CHECK_STATE:
2203			goto end;
2204		case O_EXTERNAL_ACTION:
2205		case O_EXTERNAL_INSTANCE:
2206			/* External action can have several instructions */
2207			continue;
2208		}
2209		break;
2210	}
2211	/* Print rule modifiers */
2212	for (i = 0; i < nitems(modifier_opcodes); i++)
2213		print_action(bp, fo, &state, modifier_opcodes[i]);
2214	/*
2215	 * Print rule body
2216	 */
2217	if (co->comment_only != 0)
2218		goto end;
2219
2220	if (rule->flags & IPFW_RULE_JUSTOPTS) {
2221		state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2222		goto justopts;
2223	}
2224
2225	print_proto(bp, fo, &state);
2226	if (co->do_compact != 0 && (rule->flags & IPFW_RULE_NOOPT))
2227		goto justopts;
2228
2229	/* Print source */
2230	bprintf(bp, " from");
2231	print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2232	    O_IP_SRCPORT, HAVE_SRCIP);
2233
2234	/* Print destination */
2235	bprintf(bp, " to");
2236	print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2237	    O_IP_DSTPORT, HAVE_DSTIP);
2238
2239justopts:
2240	/* Print the rest of options */
2241	while (print_opcode(bp, fo, &state, -1))
2242		;
2243end:
2244	/* Print comment at the end */
2245	cmd = print_opcode(bp, fo, &state, O_NOP);
2246	if (co->comment_only != 0 && cmd == NULL)
2247		bprintf(bp, " // ...");
2248	bprintf(bp, "\n");
2249	free_show_state(&state);
2250}
2251
2252static void
2253show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2254    struct buf_pr *bp, ipfw_dyn_rule *d)
2255{
2256	struct protoent *pe;
2257	struct in_addr a;
2258	uint16_t rulenum;
2259	char buf[INET6_ADDRSTRLEN];
2260
2261	if (d->expire == 0 && d->dyn_type != O_LIMIT_PARENT)
2262		return;
2263
2264	bcopy(&d->rule, &rulenum, sizeof(rulenum));
2265	bprintf(bp, "%05d", rulenum);
2266	if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2267		bprintf(bp, " ");
2268		pr_u64(bp, &d->pcnt, fo->pcwidth);
2269		pr_u64(bp, &d->bcnt, fo->bcwidth);
2270		bprintf(bp, "(%ds)", d->expire);
2271	}
2272	switch (d->dyn_type) {
2273	case O_LIMIT_PARENT:
2274		bprintf(bp, " PARENT %d", d->count);
2275		break;
2276	case O_LIMIT:
2277		bprintf(bp, " LIMIT");
2278		break;
2279	case O_KEEP_STATE: /* bidir, no mask */
2280		bprintf(bp, " STATE");
2281		break;
2282	}
2283
2284	if ((pe = getprotobynumber(d->id.proto)) != NULL)
2285		bprintf(bp, " %s", pe->p_name);
2286	else
2287		bprintf(bp, " proto %u", d->id.proto);
2288
2289	if (d->id.addr_type == 4) {
2290		a.s_addr = htonl(d->id.src_ip);
2291		bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2292
2293		a.s_addr = htonl(d->id.dst_ip);
2294		bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2295	} else if (d->id.addr_type == 6) {
2296		bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2297		    sizeof(buf)), d->id.src_port);
2298		bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2299		    buf, sizeof(buf)), d->id.dst_port);
2300	} else
2301		bprintf(bp, " UNKNOWN <-> UNKNOWN");
2302	if (d->kidx != 0)
2303		bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2304		    d->kidx, IPFW_TLV_STATE_NAME));
2305
2306#define	BOTH_SYN	(TH_SYN | (TH_SYN << 8))
2307#define	BOTH_FIN	(TH_FIN | (TH_FIN << 8))
2308	if (co->verbose) {
2309		bprintf(bp, " state 0x%08x%s", d->state,
2310		    d->state ? " ": ",");
2311		if (d->state & IPFW_DYN_ORPHANED)
2312			bprintf(bp, "ORPHANED,");
2313		if ((d->state & BOTH_SYN) == BOTH_SYN)
2314			bprintf(bp, "BOTH_SYN,");
2315		else {
2316			if (d->state & TH_SYN)
2317				bprintf(bp, "F_SYN,");
2318			if (d->state & (TH_SYN << 8))
2319				bprintf(bp, "R_SYN,");
2320		}
2321		if ((d->state & BOTH_FIN) == BOTH_FIN)
2322			bprintf(bp, "BOTH_FIN,");
2323		else {
2324			if (d->state & TH_FIN)
2325				bprintf(bp, "F_FIN,");
2326			if (d->state & (TH_FIN << 8))
2327				bprintf(bp, "R_FIN,");
2328		}
2329		bprintf(bp, " f_ack 0x%x, r_ack 0x%x", d->ack_fwd,
2330		    d->ack_rev);
2331	}
2332}
2333
2334static int
2335do_range_cmd(int cmd, ipfw_range_tlv *rt)
2336{
2337	ipfw_range_header rh;
2338	size_t sz;
2339
2340	memset(&rh, 0, sizeof(rh));
2341	memcpy(&rh.range, rt, sizeof(*rt));
2342	rh.range.head.length = sizeof(*rt);
2343	rh.range.head.type = IPFW_TLV_RANGE;
2344	sz = sizeof(rh);
2345
2346	if (do_get3(cmd, &rh.opheader, &sz) != 0)
2347		return (-1);
2348	/* Save number of matched objects */
2349	rt->new_set = rh.range.new_set;
2350	return (0);
2351}
2352
2353/*
2354 * This one handles all set-related commands
2355 * 	ipfw set { show | enable | disable }
2356 * 	ipfw set swap X Y
2357 * 	ipfw set move X to Y
2358 * 	ipfw set move rule X to Y
2359 */
2360void
2361ipfw_sets_handler(char *av[])
2362{
2363	ipfw_range_tlv rt;
2364	char *msg;
2365	size_t size;
2366	uint32_t masks[2];
2367	int i;
2368	uint16_t rulenum;
2369	uint8_t cmd;
2370
2371	av++;
2372	memset(&rt, 0, sizeof(rt));
2373
2374	if (av[0] == NULL)
2375		errx(EX_USAGE, "set needs command");
2376	if (_substrcmp(*av, "show") == 0) {
2377		struct format_opts fo;
2378		ipfw_cfg_lheader *cfg;
2379
2380		memset(&fo, 0, sizeof(fo));
2381		if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2382			err(EX_OSERR, "requesting config failed");
2383
2384		for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2385			if ((cfg->set_mask & (1<<i)) == 0) {
2386				printf("%s %d", msg, i);
2387				msg = "";
2388			}
2389		msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2390		for (i = 0; i < RESVD_SET; i++)
2391			if ((cfg->set_mask & (1<<i)) != 0) {
2392				printf("%s %d", msg, i);
2393				msg = "";
2394			}
2395		printf("\n");
2396		free(cfg);
2397	} else if (_substrcmp(*av, "swap") == 0) {
2398		av++;
2399		if ( av[0] == NULL || av[1] == NULL )
2400			errx(EX_USAGE, "set swap needs 2 set numbers\n");
2401		rt.set = atoi(av[0]);
2402		rt.new_set = atoi(av[1]);
2403		if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2404			errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2405		if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2406			errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2407		i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2408	} else if (_substrcmp(*av, "move") == 0) {
2409		av++;
2410		if (av[0] && _substrcmp(*av, "rule") == 0) {
2411			rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2412			cmd = IP_FW_XMOVE;
2413			av++;
2414		} else
2415			cmd = IP_FW_SET_MOVE; /* Move set to new one */
2416		if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2417				av[3] != NULL ||  _substrcmp(av[1], "to") != 0)
2418			errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2419		rulenum = atoi(av[0]);
2420		rt.new_set = atoi(av[2]);
2421		if (cmd == IP_FW_XMOVE) {
2422			rt.start_rule = rulenum;
2423			rt.end_rule = rulenum;
2424		} else
2425			rt.set = rulenum;
2426		rt.new_set = atoi(av[2]);
2427		if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2428			(cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2429			errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2430		if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2431			errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2432		i = do_range_cmd(cmd, &rt);
2433		if (i < 0)
2434			err(EX_OSERR, "failed to move %s",
2435			    cmd == IP_FW_SET_MOVE ? "set": "rule");
2436	} else if (_substrcmp(*av, "disable") == 0 ||
2437		   _substrcmp(*av, "enable") == 0 ) {
2438		int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2439
2440		av++;
2441		masks[0] = masks[1] = 0;
2442
2443		while (av[0]) {
2444			if (isdigit(**av)) {
2445				i = atoi(*av);
2446				if (i < 0 || i > RESVD_SET)
2447					errx(EX_DATAERR,
2448					    "invalid set number %d\n", i);
2449				masks[which] |= (1<<i);
2450			} else if (_substrcmp(*av, "disable") == 0)
2451				which = 0;
2452			else if (_substrcmp(*av, "enable") == 0)
2453				which = 1;
2454			else
2455				errx(EX_DATAERR,
2456					"invalid set command %s\n", *av);
2457			av++;
2458		}
2459		if ( (masks[0] & masks[1]) != 0 )
2460			errx(EX_DATAERR,
2461			    "cannot enable and disable the same set\n");
2462
2463		rt.set = masks[0];
2464		rt.new_set = masks[1];
2465		i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2466		if (i)
2467			warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2468	} else
2469		errx(EX_USAGE, "invalid set command %s\n", *av);
2470}
2471
2472void
2473ipfw_sysctl_handler(char *av[], int which)
2474{
2475	av++;
2476
2477	if (av[0] == NULL) {
2478		warnx("missing keyword to enable/disable\n");
2479	} else if (_substrcmp(*av, "firewall") == 0) {
2480		sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2481		    &which, sizeof(which));
2482		sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2483		    &which, sizeof(which));
2484	} else if (_substrcmp(*av, "one_pass") == 0) {
2485		sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2486		    &which, sizeof(which));
2487	} else if (_substrcmp(*av, "debug") == 0) {
2488		sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2489		    &which, sizeof(which));
2490	} else if (_substrcmp(*av, "verbose") == 0) {
2491		sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2492		    &which, sizeof(which));
2493	} else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2494		sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2495		    &which, sizeof(which));
2496#ifndef NO_ALTQ
2497	} else if (_substrcmp(*av, "altq") == 0) {
2498		altq_set_enabled(which);
2499#endif
2500	} else {
2501		warnx("unrecognize enable/disable keyword: %s\n", *av);
2502	}
2503}
2504
2505typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2506    void *arg, void *state);
2507
2508static void
2509prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2510    void *arg, void *_state)
2511{
2512	ipfw_dyn_rule *d;
2513	int width;
2514	uint8_t set;
2515
2516	d = (ipfw_dyn_rule *)_state;
2517	/* Count _ALL_ states */
2518	fo->dcnt++;
2519
2520	if (fo->show_counters == 0)
2521		return;
2522
2523	if (co->use_set) {
2524		/* skip states from another set */
2525		bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2526		    sizeof(uint8_t));
2527		if (set != co->use_set - 1)
2528			return;
2529	}
2530
2531	width = pr_u64(NULL, &d->pcnt, 0);
2532	if (width > fo->pcwidth)
2533		fo->pcwidth = width;
2534
2535	width = pr_u64(NULL, &d->bcnt, 0);
2536	if (width > fo->bcwidth)
2537		fo->bcwidth = width;
2538}
2539
2540static int
2541foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2542    caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2543{
2544	int ttype;
2545	state_cb *fptr;
2546	void *farg;
2547	ipfw_obj_tlv *tlv;
2548	ipfw_obj_ctlv *ctlv;
2549
2550	fptr = NULL;
2551	ttype = 0;
2552
2553	while (sz > 0) {
2554		ctlv = (ipfw_obj_ctlv *)base;
2555		switch (ctlv->head.type) {
2556		case IPFW_TLV_DYNSTATE_LIST:
2557			base += sizeof(*ctlv);
2558			sz -= sizeof(*ctlv);
2559			ttype = IPFW_TLV_DYN_ENT;
2560			fptr = dyn_bc;
2561			farg = dyn_arg;
2562			break;
2563		default:
2564			return (sz);
2565		}
2566
2567		while (sz > 0) {
2568			tlv = (ipfw_obj_tlv *)base;
2569			if (tlv->type != ttype)
2570				break;
2571
2572			fptr(co, fo, farg, tlv + 1);
2573			sz -= tlv->length;
2574			base += tlv->length;
2575		}
2576	}
2577
2578	return (sz);
2579}
2580
2581static void
2582prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2583    ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2584{
2585	int bcwidth, pcwidth, width;
2586	int n;
2587	struct ip_fw_bcounter *cntr;
2588	struct ip_fw_rule *r;
2589
2590	bcwidth = 0;
2591	pcwidth = 0;
2592	if (fo->show_counters != 0) {
2593		for (n = 0; n < rcnt; n++,
2594		    rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2595			cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2596			r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2597			/* skip rules from another set */
2598			if (co->use_set && r->set != co->use_set - 1)
2599				continue;
2600
2601			/* packet counter */
2602			width = pr_u64(NULL, &cntr->pcnt, 0);
2603			if (width > pcwidth)
2604				pcwidth = width;
2605
2606			/* byte counter */
2607			width = pr_u64(NULL, &cntr->bcnt, 0);
2608			if (width > bcwidth)
2609				bcwidth = width;
2610		}
2611	}
2612	fo->bcwidth = bcwidth;
2613	fo->pcwidth = pcwidth;
2614
2615	fo->dcnt = 0;
2616	if (co->do_dynamic && dynsz > 0)
2617		foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2618}
2619
2620static int
2621list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2622    struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2623{
2624	int n, seen;
2625	struct ip_fw_rule *r;
2626	struct ip_fw_bcounter *cntr;
2627	int c = 0;
2628
2629	for (n = seen = 0; n < rcnt; n++,
2630	    rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2631
2632		if ((fo->show_counters | fo->show_time) != 0) {
2633			cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2634			r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2635		} else {
2636			cntr = NULL;
2637			r = (struct ip_fw_rule *)(rtlv + 1);
2638		}
2639		if (r->rulenum > fo->last)
2640			break;
2641		if (co->use_set && r->set != co->use_set - 1)
2642			continue;
2643		if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2644			show_static_rule(co, fo, bp, r, cntr);
2645			printf("%s", bp->buf);
2646			c += rtlv->length;
2647			bp_flush(bp);
2648			seen++;
2649		}
2650	}
2651
2652	return (seen);
2653}
2654
2655static void
2656list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2657    void *_arg, void *_state)
2658{
2659	uint16_t rulenum;
2660	uint8_t set;
2661	ipfw_dyn_rule *d;
2662	struct buf_pr *bp;
2663
2664	d = (ipfw_dyn_rule *)_state;
2665	bp = (struct buf_pr *)_arg;
2666
2667	bcopy(&d->rule, &rulenum, sizeof(rulenum));
2668	if (rulenum > fo->last)
2669		return;
2670	if (co->use_set) {
2671		bcopy((char *)&d->rule + sizeof(uint16_t),
2672		      &set, sizeof(uint8_t));
2673		if (set != co->use_set - 1)
2674			return;
2675	}
2676	if (rulenum >= fo->first) {
2677		show_dyn_state(co, fo, bp, d);
2678		printf("%s\n", bp->buf);
2679		bp_flush(bp);
2680	}
2681}
2682
2683static int
2684list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2685    struct buf_pr *bp, caddr_t base, size_t sz)
2686{
2687
2688	sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2689	return (sz);
2690}
2691
2692void
2693ipfw_list(int ac, char *av[], int show_counters)
2694{
2695	ipfw_cfg_lheader *cfg;
2696	struct format_opts sfo;
2697	size_t sz;
2698	int error;
2699	int lac;
2700	char **lav;
2701	uint32_t rnum;
2702	char *endptr;
2703
2704	if (co.test_only) {
2705		fprintf(stderr, "Testing only, list disabled\n");
2706		return;
2707	}
2708	if (co.do_pipe) {
2709		dummynet_list(ac, av, show_counters);
2710		return;
2711	}
2712
2713	ac--;
2714	av++;
2715	memset(&sfo, 0, sizeof(sfo));
2716
2717	/* Determine rule range to request */
2718	if (ac > 0) {
2719		for (lac = ac, lav = av; lac != 0; lac--) {
2720			rnum = strtoul(*lav++, &endptr, 10);
2721			if (sfo.first == 0 || rnum < sfo.first)
2722				sfo.first = rnum;
2723
2724			if (*endptr == '-')
2725				rnum = strtoul(endptr + 1, &endptr, 10);
2726			if (sfo.last == 0 || rnum > sfo.last)
2727				sfo.last = rnum;
2728		}
2729	}
2730
2731	/* get configuraion from kernel */
2732	cfg = NULL;
2733	sfo.show_counters = show_counters;
2734	sfo.show_time = co.do_time;
2735	if (co.do_dynamic != 2)
2736		sfo.flags |= IPFW_CFG_GET_STATIC;
2737	if (co.do_dynamic != 0)
2738		sfo.flags |= IPFW_CFG_GET_STATES;
2739	if ((sfo.show_counters | sfo.show_time) != 0)
2740		sfo.flags |= IPFW_CFG_GET_COUNTERS;
2741	if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2742		err(EX_OSERR, "retrieving config failed");
2743
2744	error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2745
2746	free(cfg);
2747
2748	if (error != EX_OK)
2749		exit(error);
2750}
2751
2752static int
2753ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2754    ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2755{
2756	caddr_t dynbase;
2757	size_t dynsz;
2758	int rcnt;
2759	int exitval = EX_OK;
2760	int lac;
2761	char **lav;
2762	char *endptr;
2763	size_t readsz;
2764	struct buf_pr bp;
2765	ipfw_obj_ctlv *ctlv, *tstate;
2766	ipfw_obj_tlv *rbase;
2767
2768	/*
2769	 * Handle tablenames TLV first, if any
2770	 */
2771	tstate = NULL;
2772	rbase = NULL;
2773	dynbase = NULL;
2774	dynsz = 0;
2775	readsz = sizeof(*cfg);
2776	rcnt = 0;
2777
2778	fo->set_mask = cfg->set_mask;
2779
2780	ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2781	if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2782		object_sort_ctlv(ctlv);
2783		fo->tstate = ctlv;
2784		readsz += ctlv->head.length;
2785		ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
2786	}
2787
2788	if (cfg->flags & IPFW_CFG_GET_STATIC) {
2789		/* We've requested static rules */
2790		if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2791			rbase = (ipfw_obj_tlv *)(ctlv + 1);
2792			rcnt = ctlv->count;
2793			readsz += ctlv->head.length;
2794			ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2795			    ctlv->head.length);
2796		}
2797	}
2798
2799	if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz))  {
2800		/* We may have some dynamic states */
2801		dynsz = sz - readsz;
2802		/* Skip empty header */
2803		if (dynsz != sizeof(ipfw_obj_ctlv))
2804			dynbase = (caddr_t)ctlv;
2805		else
2806			dynsz = 0;
2807	}
2808
2809	prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2810	bp_alloc(&bp, 4096);
2811
2812	/* if no rule numbers were specified, list all rules */
2813	if (ac == 0) {
2814		fo->first = 0;
2815		fo->last = IPFW_DEFAULT_RULE;
2816		if (cfg->flags & IPFW_CFG_GET_STATIC)
2817			list_static_range(co, fo, &bp, rbase, rcnt);
2818
2819		if (co->do_dynamic && dynsz > 0) {
2820			printf("## Dynamic rules (%d %zu):\n", fo->dcnt,
2821			    dynsz);
2822			list_dyn_range(co, fo, &bp, dynbase, dynsz);
2823		}
2824
2825		bp_free(&bp);
2826		return (EX_OK);
2827	}
2828
2829	/* display specific rules requested on command line */
2830	for (lac = ac, lav = av; lac != 0; lac--) {
2831		/* convert command line rule # */
2832		fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2833		if (*endptr == '-')
2834			fo->last = strtoul(endptr + 1, &endptr, 10);
2835		if (*endptr) {
2836			exitval = EX_USAGE;
2837			warnx("invalid rule number: %s", *(lav - 1));
2838			continue;
2839		}
2840
2841		if ((cfg->flags & IPFW_CFG_GET_STATIC) == 0)
2842			continue;
2843
2844		if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2845			/* give precedence to other error(s) */
2846			if (exitval == EX_OK)
2847				exitval = EX_UNAVAILABLE;
2848			if (fo->first == fo->last)
2849				warnx("rule %u does not exist", fo->first);
2850			else
2851				warnx("no rules in range %u-%u",
2852				    fo->first, fo->last);
2853		}
2854	}
2855
2856	if (co->do_dynamic && dynsz > 0) {
2857		printf("## Dynamic rules:\n");
2858		for (lac = ac, lav = av; lac != 0; lac--) {
2859			fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2860			if (*endptr == '-')
2861				fo->last = strtoul(endptr+1, &endptr, 10);
2862			if (*endptr)
2863				/* already warned */
2864				continue;
2865			list_dyn_range(co, fo, &bp, dynbase, dynsz);
2866		}
2867	}
2868
2869	bp_free(&bp);
2870	return (exitval);
2871}
2872
2873
2874/*
2875 * Retrieves current ipfw configuration of given type
2876 * and stores its pointer to @pcfg.
2877 *
2878 * Caller is responsible for freeing @pcfg.
2879 *
2880 * Returns 0 on success.
2881 */
2882
2883static int
2884ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2885    ipfw_cfg_lheader **pcfg, size_t *psize)
2886{
2887	ipfw_cfg_lheader *cfg;
2888	size_t sz;
2889	int i;
2890
2891
2892	if (co->test_only != 0) {
2893		fprintf(stderr, "Testing only, list disabled\n");
2894		return (0);
2895	}
2896
2897	/* Start with some data size */
2898	sz = 4096;
2899	cfg = NULL;
2900
2901	for (i = 0; i < 16; i++) {
2902		if (cfg != NULL)
2903			free(cfg);
2904		if ((cfg = calloc(1, sz)) == NULL)
2905			return (ENOMEM);
2906
2907		cfg->flags = fo->flags;
2908		cfg->start_rule = fo->first;
2909		cfg->end_rule = fo->last;
2910
2911		if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2912			if (errno != ENOMEM) {
2913				free(cfg);
2914				return (errno);
2915			}
2916
2917			/* Buffer size is not enough. Try to increase */
2918			sz = sz * 2;
2919			if (sz < cfg->size)
2920				sz = cfg->size;
2921			continue;
2922		}
2923
2924		*pcfg = cfg;
2925		*psize = sz;
2926		return (0);
2927	}
2928
2929	free(cfg);
2930	return (ENOMEM);
2931}
2932
2933static int
2934lookup_host (char *host, struct in_addr *ipaddr)
2935{
2936	struct hostent *he;
2937
2938	if (!inet_aton(host, ipaddr)) {
2939		if ((he = gethostbyname(host)) == NULL)
2940			return(-1);
2941		*ipaddr = *(struct in_addr *)he->h_addr_list[0];
2942	}
2943	return(0);
2944}
2945
2946struct tidx {
2947	ipfw_obj_ntlv *idx;
2948	uint32_t count;
2949	uint32_t size;
2950	uint16_t counter;
2951	uint8_t set;
2952};
2953
2954int
2955ipfw_check_object_name(const char *name)
2956{
2957	int c, i, l;
2958
2959	/*
2960	 * Check that name is null-terminated and contains
2961	 * valid symbols only. Valid mask is:
2962	 * [a-zA-Z0-9\-_\.]{1,63}
2963	 */
2964	l = strlen(name);
2965	if (l == 0 || l >= 64)
2966		return (EINVAL);
2967	for (i = 0; i < l; i++) {
2968		c = name[i];
2969		if (isalpha(c) || isdigit(c) || c == '_' ||
2970		    c == '-' || c == '.')
2971			continue;
2972		return (EINVAL);
2973	}
2974	return (0);
2975}
2976
2977static char *default_state_name = "default";
2978static int
2979state_check_name(const char *name)
2980{
2981
2982	if (ipfw_check_object_name(name) != 0)
2983		return (EINVAL);
2984	if (strcmp(name, "any") == 0)
2985		return (EINVAL);
2986	return (0);
2987}
2988
2989static int
2990eaction_check_name(const char *name)
2991{
2992
2993	if (ipfw_check_object_name(name) != 0)
2994		return (EINVAL);
2995	/* Restrict some 'special' names */
2996	if (match_token(rule_actions, name) != -1 &&
2997	    match_token(rule_action_params, name) != -1)
2998		return (EINVAL);
2999	return (0);
3000}
3001
3002static uint16_t
3003pack_object(struct tidx *tstate, char *name, int otype)
3004{
3005	int i;
3006	ipfw_obj_ntlv *ntlv;
3007
3008	for (i = 0; i < tstate->count; i++) {
3009		if (strcmp(tstate->idx[i].name, name) != 0)
3010			continue;
3011		if (tstate->idx[i].set != tstate->set)
3012			continue;
3013		if (tstate->idx[i].head.type != otype)
3014			continue;
3015
3016		return (tstate->idx[i].idx);
3017	}
3018
3019	if (tstate->count + 1 > tstate->size) {
3020		tstate->size += 4;
3021		tstate->idx = realloc(tstate->idx, tstate->size *
3022		    sizeof(ipfw_obj_ntlv));
3023		if (tstate->idx == NULL)
3024			return (0);
3025	}
3026
3027	ntlv = &tstate->idx[i];
3028	memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
3029	strlcpy(ntlv->name, name, sizeof(ntlv->name));
3030	ntlv->head.type = otype;
3031	ntlv->head.length = sizeof(ipfw_obj_ntlv);
3032	ntlv->set = tstate->set;
3033	ntlv->idx = ++tstate->counter;
3034	tstate->count++;
3035
3036	return (ntlv->idx);
3037}
3038
3039static uint16_t
3040pack_table(struct tidx *tstate, char *name)
3041{
3042
3043	if (table_check_name(name) != 0)
3044		return (0);
3045
3046	return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3047}
3048
3049void
3050fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3051    struct tidx *tstate)
3052{
3053	uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3054	uint16_t uidx;
3055	char *p;
3056
3057	if ((p = strchr(av + 6, ')')) == NULL)
3058		errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3059	*p = '\0';
3060	p = strchr(av + 6, ',');
3061	if (p)
3062		*p++ = '\0';
3063
3064	if ((uidx = pack_table(tstate, av + 6)) == 0)
3065		errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3066
3067	cmd->opcode = opcode;
3068	cmd->arg1 = uidx;
3069	if (p) {
3070		cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3071		d[0] = strtoul(p, NULL, 0);
3072	} else
3073		cmd->len |= F_INSN_SIZE(ipfw_insn);
3074}
3075
3076
3077/*
3078 * fills the addr and mask fields in the instruction as appropriate from av.
3079 * Update length as appropriate.
3080 * The following formats are allowed:
3081 *	me	returns O_IP_*_ME
3082 *	1.2.3.4		single IP address
3083 *	1.2.3.4:5.6.7.8	address:mask
3084 *	1.2.3.4/24	address/mask
3085 *	1.2.3.4/26{1,6,5,4,23}	set of addresses in a subnet
3086 * We can have multiple comma-separated address/mask entries.
3087 */
3088static void
3089fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3090{
3091	int len = 0;
3092	uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3093
3094	cmd->o.len &= ~F_LEN_MASK;	/* zero len */
3095
3096	if (_substrcmp(av, "any") == 0)
3097		return;
3098
3099	if (_substrcmp(av, "me") == 0) {
3100		cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3101		return;
3102	}
3103
3104	if (strncmp(av, "table(", 6) == 0) {
3105		fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3106		return;
3107	}
3108
3109    while (av) {
3110	/*
3111	 * After the address we can have '/' or ':' indicating a mask,
3112	 * ',' indicating another address follows, '{' indicating a
3113	 * set of addresses of unspecified size.
3114	 */
3115	char *t = NULL, *p = strpbrk(av, "/:,{");
3116	int masklen;
3117	char md, nd = '\0';
3118
3119	CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3120
3121	if (p) {
3122		md = *p;
3123		*p++ = '\0';
3124		if ((t = strpbrk(p, ",{")) != NULL) {
3125			nd = *t;
3126			*t = '\0';
3127		}
3128	} else
3129		md = '\0';
3130
3131	if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3132		errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3133	switch (md) {
3134	case ':':
3135		if (!inet_aton(p, (struct in_addr *)&d[1]))
3136			errx(EX_DATAERR, "bad netmask ``%s''", p);
3137		break;
3138	case '/':
3139		masklen = atoi(p);
3140		if (masklen == 0)
3141			d[1] = htonl(0U);	/* mask */
3142		else if (masklen > 32)
3143			errx(EX_DATAERR, "bad width ``%s''", p);
3144		else
3145			d[1] = htonl(~0U << (32 - masklen));
3146		break;
3147	case '{':	/* no mask, assume /24 and put back the '{' */
3148		d[1] = htonl(~0U << (32 - 24));
3149		*(--p) = md;
3150		break;
3151
3152	case ',':	/* single address plus continuation */
3153		*(--p) = md;
3154		/* FALLTHROUGH */
3155	case 0:		/* initialization value */
3156	default:
3157		d[1] = htonl(~0U);	/* force /32 */
3158		break;
3159	}
3160	d[0] &= d[1];		/* mask base address with mask */
3161	if (t)
3162		*t = nd;
3163	/* find next separator */
3164	if (p)
3165		p = strpbrk(p, ",{");
3166	if (p && *p == '{') {
3167		/*
3168		 * We have a set of addresses. They are stored as follows:
3169		 *   arg1	is the set size (powers of 2, 2..256)
3170		 *   addr	is the base address IN HOST FORMAT
3171		 *   mask..	is an array of arg1 bits (rounded up to
3172		 *		the next multiple of 32) with bits set
3173		 *		for each host in the map.
3174		 */
3175		uint32_t *map = (uint32_t *)&cmd->mask;
3176		int low, high;
3177		int i = contigmask((uint8_t *)&(d[1]), 32);
3178
3179		if (len > 0)
3180			errx(EX_DATAERR, "address set cannot be in a list");
3181		if (i < 24 || i > 31)
3182			errx(EX_DATAERR, "invalid set with mask %d\n", i);
3183		cmd->o.arg1 = 1<<(32-i);	/* map length		*/
3184		d[0] = ntohl(d[0]);		/* base addr in host format */
3185		cmd->o.opcode = O_IP_DST_SET;	/* default */
3186		cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3187		for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3188			map[i] = 0;	/* clear map */
3189
3190		av = p + 1;
3191		low = d[0] & 0xff;
3192		high = low + cmd->o.arg1 - 1;
3193		/*
3194		 * Here, i stores the previous value when we specify a range
3195		 * of addresses within a mask, e.g. 45-63. i = -1 means we
3196		 * have no previous value.
3197		 */
3198		i = -1;	/* previous value in a range */
3199		while (isdigit(*av)) {
3200			char *s;
3201			int a = strtol(av, &s, 0);
3202
3203			if (s == av) { /* no parameter */
3204			    if (*av != '}')
3205				errx(EX_DATAERR, "set not closed\n");
3206			    if (i != -1)
3207				errx(EX_DATAERR, "incomplete range %d-", i);
3208			    break;
3209			}
3210			if (a < low || a > high)
3211			    errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3212				a, low, high);
3213			a -= low;
3214			if (i == -1)	/* no previous in range */
3215			    i = a;
3216			else {		/* check that range is valid */
3217			    if (i > a)
3218				errx(EX_DATAERR, "invalid range %d-%d",
3219					i+low, a+low);
3220			    if (*s == '-')
3221				errx(EX_DATAERR, "double '-' in range");
3222			}
3223			for (; i <= a; i++)
3224			    map[i/32] |= 1<<(i & 31);
3225			i = -1;
3226			if (*s == '-')
3227			    i = a;
3228			else if (*s == '}')
3229			    break;
3230			av = s+1;
3231		}
3232		return;
3233	}
3234	av = p;
3235	if (av)			/* then *av must be a ',' */
3236		av++;
3237
3238	/* Check this entry */
3239	if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3240		/*
3241		 * 'any' turns the entire list into a NOP.
3242		 * 'not any' never matches, so it is removed from the
3243		 * list unless it is the only item, in which case we
3244		 * report an error.
3245		 */
3246		if (cmd->o.len & F_NOT) {	/* "not any" never matches */
3247			if (av == NULL && len == 0) /* only this entry */
3248				errx(EX_DATAERR, "not any never matches");
3249		}
3250		/* else do nothing and skip this entry */
3251		return;
3252	}
3253	/* A single IP can be stored in an optimized format */
3254	if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3255		cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3256		return;
3257	}
3258	len += 2;	/* two words... */
3259	d += 2;
3260    } /* end while */
3261    if (len + 1 > F_LEN_MASK)
3262	errx(EX_DATAERR, "address list too long");
3263    cmd->o.len |= len+1;
3264}
3265
3266
3267/* n2mask sets n bits of the mask */
3268void
3269n2mask(struct in6_addr *mask, int n)
3270{
3271	static int	minimask[9] =
3272	    { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3273	u_char		*p;
3274
3275	memset(mask, 0, sizeof(struct in6_addr));
3276	p = (u_char *) mask;
3277	for (; n > 0; p++, n -= 8) {
3278		if (n >= 8)
3279			*p = 0xff;
3280		else
3281			*p = minimask[n];
3282	}
3283	return;
3284}
3285
3286static void
3287fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3288	struct _s_x *flags, char *p)
3289{
3290	char *e;
3291	uint32_t set = 0, clear = 0;
3292
3293	if (fill_flags(flags, p, &e, &set, &clear) != 0)
3294		errx(EX_DATAERR, "invalid flag %s", e);
3295
3296	cmd->opcode = opcode;
3297	cmd->len =  (cmd->len & (F_NOT | F_OR)) | 1;
3298	cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3299}
3300
3301
3302void
3303ipfw_delete(char *av[])
3304{
3305	ipfw_range_tlv rt;
3306	char *sep;
3307	int i, j;
3308	int exitval = EX_OK;
3309	int do_set = 0;
3310
3311	av++;
3312	NEED1("missing rule specification");
3313	if ( *av && _substrcmp(*av, "set") == 0) {
3314		/* Do not allow using the following syntax:
3315		 *	ipfw set N delete set M
3316		 */
3317		if (co.use_set)
3318			errx(EX_DATAERR, "invalid syntax");
3319		do_set = 1;	/* delete set */
3320		av++;
3321	}
3322
3323	/* Rule number */
3324	while (*av && isdigit(**av)) {
3325		i = strtol(*av, &sep, 10);
3326		j = i;
3327		if (*sep== '-')
3328			j = strtol(sep + 1, NULL, 10);
3329		av++;
3330		if (co.do_nat) {
3331			exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3332			if (exitval) {
3333				exitval = EX_UNAVAILABLE;
3334				if (co.do_quiet)
3335					continue;
3336				warn("nat %u not available", i);
3337			}
3338		} else if (co.do_pipe) {
3339			exitval = ipfw_delete_pipe(co.do_pipe, i);
3340		} else {
3341			memset(&rt, 0, sizeof(rt));
3342			if (do_set != 0) {
3343				rt.set = i & 31;
3344				rt.flags = IPFW_RCFLAG_SET;
3345			} else {
3346				rt.start_rule = i & 0xffff;
3347				rt.end_rule = j & 0xffff;
3348				if (rt.start_rule == 0 && rt.end_rule == 0)
3349					rt.flags |= IPFW_RCFLAG_ALL;
3350				else
3351					rt.flags |= IPFW_RCFLAG_RANGE;
3352				if (co.use_set != 0) {
3353					rt.set = co.use_set - 1;
3354					rt.flags |= IPFW_RCFLAG_SET;
3355				}
3356			}
3357			if (co.do_dynamic == 2)
3358				rt.flags |= IPFW_RCFLAG_DYNAMIC;
3359			i = do_range_cmd(IP_FW_XDEL, &rt);
3360			if (i != 0) {
3361				exitval = EX_UNAVAILABLE;
3362				if (co.do_quiet)
3363					continue;
3364				warn("rule %u: setsockopt(IP_FW_XDEL)",
3365				    rt.start_rule);
3366			} else if (rt.new_set == 0 && do_set == 0 &&
3367			    co.do_dynamic != 2) {
3368				exitval = EX_UNAVAILABLE;
3369				if (co.do_quiet)
3370					continue;
3371				if (rt.start_rule != rt.end_rule)
3372					warnx("no rules rules in %u-%u range",
3373					    rt.start_rule, rt.end_rule);
3374				else
3375					warnx("rule %u not found",
3376					    rt.start_rule);
3377			}
3378		}
3379	}
3380	if (exitval != EX_OK && co.do_force == 0)
3381		exit(exitval);
3382}
3383
3384
3385/*
3386 * fill the interface structure. We do not check the name as we can
3387 * create interfaces dynamically, so checking them at insert time
3388 * makes relatively little sense.
3389 * Interface names containing '*', '?', or '[' are assumed to be shell
3390 * patterns which match interfaces.
3391 */
3392static void
3393fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3394{
3395	char *p;
3396	uint16_t uidx;
3397
3398	cmd->name[0] = '\0';
3399	cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3400
3401	CHECK_CMDLEN;
3402
3403	/* Parse the interface or address */
3404	if (strcmp(arg, "any") == 0)
3405		cmd->o.len = 0;		/* effectively ignore this command */
3406	else if (strncmp(arg, "table(", 6) == 0) {
3407		if ((p = strchr(arg + 6, ')')) == NULL)
3408			errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3409		*p = '\0';
3410		p = strchr(arg + 6, ',');
3411		if (p)
3412			*p++ = '\0';
3413		if ((uidx = pack_table(tstate, arg + 6)) == 0)
3414			errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3415
3416		cmd->name[0] = '\1'; /* Special value indicating table */
3417		cmd->p.kidx = uidx;
3418	} else if (!isdigit(*arg)) {
3419		strlcpy(cmd->name, arg, sizeof(cmd->name));
3420		cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3421	} else if (!inet_aton(arg, &cmd->p.ip))
3422		errx(EX_DATAERR, "bad ip address ``%s''", arg);
3423}
3424
3425static void
3426get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3427{
3428	int i;
3429	size_t l;
3430	char *ap, *ptr, *optr;
3431	struct ether_addr *mac;
3432	const char *macset = "0123456789abcdefABCDEF:";
3433
3434	if (strcmp(p, "any") == 0) {
3435		for (i = 0; i < ETHER_ADDR_LEN; i++)
3436			addr[i] = mask[i] = 0;
3437		return;
3438	}
3439
3440	optr = ptr = strdup(p);
3441	if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3442		l = strlen(ap);
3443		if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3444			errx(EX_DATAERR, "Incorrect MAC address");
3445		bcopy(mac, addr, ETHER_ADDR_LEN);
3446	} else
3447		errx(EX_DATAERR, "Incorrect MAC address");
3448
3449	if (ptr != NULL) { /* we have mask? */
3450		if (p[ptr - optr - 1] == '/') { /* mask len */
3451			long ml = strtol(ptr, &ap, 10);
3452			if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3453				errx(EX_DATAERR, "Incorrect mask length");
3454			for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3455				mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3456		} else { /* mask */
3457			l = strlen(ptr);
3458			if (strspn(ptr, macset) != l ||
3459			    (mac = ether_aton(ptr)) == NULL)
3460				errx(EX_DATAERR, "Incorrect mask");
3461			bcopy(mac, mask, ETHER_ADDR_LEN);
3462		}
3463	} else { /* default mask: ff:ff:ff:ff:ff:ff */
3464		for (i = 0; i < ETHER_ADDR_LEN; i++)
3465			mask[i] = 0xff;
3466	}
3467	for (i = 0; i < ETHER_ADDR_LEN; i++)
3468		addr[i] &= mask[i];
3469
3470	free(optr);
3471}
3472
3473/*
3474 * helper function, updates the pointer to cmd with the length
3475 * of the current command, and also cleans up the first word of
3476 * the new command in case it has been clobbered before.
3477 */
3478static ipfw_insn *
3479next_cmd(ipfw_insn *cmd, int *len)
3480{
3481	*len -= F_LEN(cmd);
3482	CHECK_LENGTH(*len, 0);
3483	cmd += F_LEN(cmd);
3484	bzero(cmd, sizeof(*cmd));
3485	return cmd;
3486}
3487
3488/*
3489 * Takes arguments and copies them into a comment
3490 */
3491static void
3492fill_comment(ipfw_insn *cmd, char **av, int cblen)
3493{
3494	int i, l;
3495	char *p = (char *)(cmd + 1);
3496
3497	cmd->opcode = O_NOP;
3498	cmd->len =  (cmd->len & (F_NOT | F_OR));
3499
3500	/* Compute length of comment string. */
3501	for (i = 0, l = 0; av[i] != NULL; i++)
3502		l += strlen(av[i]) + 1;
3503	if (l == 0)
3504		return;
3505	if (l > 84)
3506		errx(EX_DATAERR,
3507		    "comment too long (max 80 chars)");
3508	l = 1 + (l+3)/4;
3509	cmd->len =  (cmd->len & (F_NOT | F_OR)) | l;
3510	CHECK_CMDLEN;
3511
3512	for (i = 0; av[i] != NULL; i++) {
3513		strcpy(p, av[i]);
3514		p += strlen(av[i]);
3515		*p++ = ' ';
3516	}
3517	*(--p) = '\0';
3518}
3519
3520/*
3521 * A function to fill simple commands of size 1.
3522 * Existing flags are preserved.
3523 */
3524static void
3525fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3526{
3527	cmd->opcode = opcode;
3528	cmd->len =  ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3529	cmd->arg1 = arg;
3530}
3531
3532/*
3533 * Fetch and add the MAC address and type, with masks. This generates one or
3534 * two microinstructions, and returns the pointer to the last one.
3535 */
3536static ipfw_insn *
3537add_mac(ipfw_insn *cmd, char *av[], int cblen)
3538{
3539	ipfw_insn_mac *mac;
3540
3541	if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3542		errx(EX_DATAERR, "MAC dst src");
3543
3544	cmd->opcode = O_MACADDR2;
3545	cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3546	CHECK_CMDLEN;
3547
3548	mac = (ipfw_insn_mac *)cmd;
3549	get_mac_addr_mask(av[0], mac->addr, mac->mask);	/* dst */
3550	get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3551	    &(mac->mask[ETHER_ADDR_LEN])); /* src */
3552	return cmd;
3553}
3554
3555static ipfw_insn *
3556add_mactype(ipfw_insn *cmd, char *av, int cblen)
3557{
3558	if (!av)
3559		errx(EX_DATAERR, "missing MAC type");
3560	if (strcmp(av, "any") != 0) { /* we have a non-null type */
3561		fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3562		    cblen);
3563		cmd->opcode = O_MAC_TYPE;
3564		return cmd;
3565	} else
3566		return NULL;
3567}
3568
3569static ipfw_insn *
3570add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3571{
3572	struct protoent *pe;
3573	char *ep;
3574	int proto;
3575
3576	proto = strtol(av, &ep, 10);
3577	if (*ep != '\0' || proto <= 0) {
3578		if ((pe = getprotobyname(av)) == NULL)
3579			return NULL;
3580		proto = pe->p_proto;
3581	}
3582
3583	fill_cmd(cmd, O_PROTO, 0, proto);
3584	*protop = proto;
3585	return cmd;
3586}
3587
3588static ipfw_insn *
3589add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3590{
3591	u_char proto = IPPROTO_IP;
3592
3593	if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3594		; /* do not set O_IP4 nor O_IP6 */
3595	else if (strcmp(av, "ip4") == 0)
3596		/* explicit "just IPv4" rule */
3597		fill_cmd(cmd, O_IP4, 0, 0);
3598	else if (strcmp(av, "ip6") == 0) {
3599		/* explicit "just IPv6" rule */
3600		proto = IPPROTO_IPV6;
3601		fill_cmd(cmd, O_IP6, 0, 0);
3602	} else
3603		return add_proto0(cmd, av, protop);
3604
3605	*protop = proto;
3606	return cmd;
3607}
3608
3609static ipfw_insn *
3610add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3611{
3612	u_char proto = IPPROTO_IP;
3613
3614	if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3615		; /* do not set O_IP4 nor O_IP6 */
3616	else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3617		/* explicit "just IPv4" rule */
3618		fill_cmd(cmd, O_IP4, 0, 0);
3619	else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3620		/* explicit "just IPv6" rule */
3621		proto = IPPROTO_IPV6;
3622		fill_cmd(cmd, O_IP6, 0, 0);
3623	} else
3624		return add_proto0(cmd, av, protop);
3625
3626	*protop = proto;
3627	return cmd;
3628}
3629
3630static ipfw_insn *
3631add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3632{
3633	fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3634	if (cmd->opcode == O_IP_DST_SET)			/* set */
3635		cmd->opcode = O_IP_SRC_SET;
3636	else if (cmd->opcode == O_IP_DST_LOOKUP)		/* table */
3637		cmd->opcode = O_IP_SRC_LOOKUP;
3638	else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))		/* me */
3639		cmd->opcode = O_IP_SRC_ME;
3640	else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))	/* one IP */
3641		cmd->opcode = O_IP_SRC;
3642	else							/* addr/mask */
3643		cmd->opcode = O_IP_SRC_MASK;
3644	return cmd;
3645}
3646
3647static ipfw_insn *
3648add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3649{
3650	fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3651	if (cmd->opcode == O_IP_DST_SET)			/* set */
3652		;
3653	else if (cmd->opcode == O_IP_DST_LOOKUP)		/* table */
3654		;
3655	else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn))		/* me */
3656		cmd->opcode = O_IP_DST_ME;
3657	else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))	/* one IP */
3658		cmd->opcode = O_IP_DST;
3659	else							/* addr/mask */
3660		cmd->opcode = O_IP_DST_MASK;
3661	return cmd;
3662}
3663
3664static struct _s_x f_reserved_keywords[] = {
3665	{ "altq",	TOK_OR },
3666	{ "//",		TOK_OR },
3667	{ "diverted",	TOK_OR },
3668	{ "dst-port",	TOK_OR },
3669	{ "src-port",	TOK_OR },
3670	{ "established",	TOK_OR },
3671	{ "keep-state",	TOK_OR },
3672	{ "frag",	TOK_OR },
3673	{ "icmptypes",	TOK_OR },
3674	{ "in",		TOK_OR },
3675	{ "out",	TOK_OR },
3676	{ "ip6",	TOK_OR },
3677	{ "any",	TOK_OR },
3678	{ "to",		TOK_OR },
3679	{ "via",	TOK_OR },
3680	{ "{",		TOK_OR },
3681	{ NULL, 0 }	/* terminator */
3682};
3683
3684static ipfw_insn *
3685add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3686{
3687
3688	if (match_token(f_reserved_keywords, av) != -1)
3689		return (NULL);
3690
3691	if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3692		/* XXX todo: check that we have a protocol with ports */
3693		cmd->opcode = opcode;
3694		return cmd;
3695	}
3696	return NULL;
3697}
3698
3699static ipfw_insn *
3700add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3701{
3702	struct in6_addr a;
3703	char *host, *ch, buf[INET6_ADDRSTRLEN];
3704	ipfw_insn *ret = NULL;
3705	int len;
3706
3707	/* Copy first address in set if needed */
3708	if ((ch = strpbrk(av, "/,")) != NULL) {
3709		len = ch - av;
3710		strlcpy(buf, av, sizeof(buf));
3711		if (len < sizeof(buf))
3712			buf[len] = '\0';
3713		host = buf;
3714	} else
3715		host = av;
3716
3717	if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3718	    inet_pton(AF_INET6, host, &a) == 1)
3719		ret = add_srcip6(cmd, av, cblen, tstate);
3720	/* XXX: should check for IPv4, not !IPv6 */
3721	if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3722	    inet_pton(AF_INET6, host, &a) != 1))
3723		ret = add_srcip(cmd, av, cblen, tstate);
3724	if (ret == NULL && strcmp(av, "any") != 0)
3725		ret = cmd;
3726
3727	return ret;
3728}
3729
3730static ipfw_insn *
3731add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3732{
3733	struct in6_addr a;
3734	char *host, *ch, buf[INET6_ADDRSTRLEN];
3735	ipfw_insn *ret = NULL;
3736	int len;
3737
3738	/* Copy first address in set if needed */
3739	if ((ch = strpbrk(av, "/,")) != NULL) {
3740		len = ch - av;
3741		strlcpy(buf, av, sizeof(buf));
3742		if (len < sizeof(buf))
3743			buf[len] = '\0';
3744		host = buf;
3745	} else
3746		host = av;
3747
3748	if (proto == IPPROTO_IPV6  || strcmp(av, "me6") == 0 ||
3749	    inet_pton(AF_INET6, host, &a) == 1)
3750		ret = add_dstip6(cmd, av, cblen, tstate);
3751	/* XXX: should check for IPv4, not !IPv6 */
3752	if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3753	    inet_pton(AF_INET6, host, &a) != 1))
3754		ret = add_dstip(cmd, av, cblen, tstate);
3755	if (ret == NULL && strcmp(av, "any") != 0)
3756		ret = cmd;
3757
3758	return ret;
3759}
3760
3761/*
3762 * Parse arguments and assemble the microinstructions which make up a rule.
3763 * Rules are added into the 'rulebuf' and then copied in the correct order
3764 * into the actual rule.
3765 *
3766 * The syntax for a rule starts with the action, followed by
3767 * optional action parameters, and the various match patterns.
3768 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3769 * (generated if the rule includes a keep-state option), then the
3770 * various match patterns, log/altq actions, and the actual action.
3771 *
3772 */
3773void
3774compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3775{
3776	/*
3777	 * rules are added into the 'rulebuf' and then copied in
3778	 * the correct order into the actual rule.
3779	 * Some things that need to go out of order (prob, action etc.)
3780	 * go into actbuf[].
3781	 */
3782	static uint32_t actbuf[255], cmdbuf[255];
3783	int rblen, ablen, cblen;
3784
3785	ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3786	ipfw_insn *first_cmd;	/* first match pattern */
3787
3788	struct ip_fw_rule *rule;
3789
3790	/*
3791	 * various flags used to record that we entered some fields.
3792	 */
3793	ipfw_insn *have_state = NULL;	/* any state-related option */
3794	int have_rstate = 0;
3795	ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3796	ipfw_insn *have_skipcmd = NULL;
3797	size_t len;
3798
3799	int i;
3800
3801	int open_par = 0;	/* open parenthesis ( */
3802
3803	/* proto is here because it is used to fetch ports */
3804	u_char proto = IPPROTO_IP;	/* default protocol */
3805
3806	double match_prob = 1; /* match probability, default is always match */
3807
3808	bzero(actbuf, sizeof(actbuf));		/* actions go here */
3809	bzero(cmdbuf, sizeof(cmdbuf));
3810	bzero(rbuf, *rbufsize);
3811
3812	rule = (struct ip_fw_rule *)rbuf;
3813	cmd = (ipfw_insn *)cmdbuf;
3814	action = (ipfw_insn *)actbuf;
3815
3816	rblen = *rbufsize / sizeof(uint32_t);
3817	rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3818	ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3819	cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3820	cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3821
3822#define	CHECK_RBUFLEN(len)	{ CHECK_LENGTH(rblen, len); rblen -= len; }
3823#define	CHECK_ACTLEN		CHECK_LENGTH(ablen, action->len)
3824
3825	av++;
3826
3827	/* [rule N]	-- Rule number optional */
3828	if (av[0] && isdigit(**av)) {
3829		rule->rulenum = atoi(*av);
3830		av++;
3831	}
3832
3833	/* [set N]	-- set number (0..RESVD_SET), optional */
3834	if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3835		int set = strtoul(av[1], NULL, 10);
3836		if (set < 0 || set > RESVD_SET)
3837			errx(EX_DATAERR, "illegal set %s", av[1]);
3838		rule->set = set;
3839		tstate->set = set;
3840		av += 2;
3841	}
3842
3843	/* [prob D]	-- match probability, optional */
3844	if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3845		match_prob = strtod(av[1], NULL);
3846
3847		if (match_prob <= 0 || match_prob > 1)
3848			errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3849		av += 2;
3850	}
3851
3852	/* action	-- mandatory */
3853	NEED1("missing action");
3854	i = match_token(rule_actions, *av);
3855	av++;
3856	action->len = 1;	/* default */
3857	CHECK_ACTLEN;
3858	switch(i) {
3859	case TOK_CHECKSTATE:
3860		have_state = action;
3861		action->opcode = O_CHECK_STATE;
3862		if (*av == NULL ||
3863		    match_token(rule_options, *av) == TOK_COMMENT) {
3864			action->arg1 = pack_object(tstate,
3865			    default_state_name, IPFW_TLV_STATE_NAME);
3866			break;
3867		}
3868		if (*av[0] == ':') {
3869			if (strcmp(*av + 1, "any") == 0)
3870				action->arg1 = 0;
3871			else if (state_check_name(*av + 1) == 0)
3872				action->arg1 = pack_object(tstate, *av + 1,
3873				    IPFW_TLV_STATE_NAME);
3874			else
3875				errx(EX_DATAERR, "Invalid state name %s",
3876				    *av);
3877			av++;
3878			break;
3879		}
3880		errx(EX_DATAERR, "Invalid state name %s", *av);
3881		break;
3882
3883	case TOK_ABORT:
3884		action->opcode = O_REJECT;
3885		action->arg1 = ICMP_REJECT_ABORT;
3886		break;
3887
3888	case TOK_ABORT6:
3889		action->opcode = O_UNREACH6;
3890		action->arg1 = ICMP6_UNREACH_ABORT;
3891		break;
3892
3893	case TOK_ACCEPT:
3894		action->opcode = O_ACCEPT;
3895		break;
3896
3897	case TOK_DENY:
3898		action->opcode = O_DENY;
3899		action->arg1 = 0;
3900		break;
3901
3902	case TOK_REJECT:
3903		action->opcode = O_REJECT;
3904		action->arg1 = ICMP_UNREACH_HOST;
3905		break;
3906
3907	case TOK_RESET:
3908		action->opcode = O_REJECT;
3909		action->arg1 = ICMP_REJECT_RST;
3910		break;
3911
3912	case TOK_RESET6:
3913		action->opcode = O_UNREACH6;
3914		action->arg1 = ICMP6_UNREACH_RST;
3915		break;
3916
3917	case TOK_UNREACH:
3918		action->opcode = O_REJECT;
3919		NEED1("missing reject code");
3920		fill_reject_code(&action->arg1, *av);
3921		av++;
3922		break;
3923
3924	case TOK_UNREACH6:
3925		action->opcode = O_UNREACH6;
3926		NEED1("missing unreach code");
3927		fill_unreach6_code(&action->arg1, *av);
3928		av++;
3929		break;
3930
3931	case TOK_COUNT:
3932		action->opcode = O_COUNT;
3933		break;
3934
3935	case TOK_NAT:
3936		action->opcode = O_NAT;
3937		action->len = F_INSN_SIZE(ipfw_insn_nat);
3938		CHECK_ACTLEN;
3939		if (*av != NULL && _substrcmp(*av, "global") == 0) {
3940			action->arg1 = IP_FW_NAT44_GLOBAL;
3941			av++;
3942			break;
3943		} else
3944			goto chkarg;
3945	case TOK_QUEUE:
3946		action->opcode = O_QUEUE;
3947		goto chkarg;
3948	case TOK_PIPE:
3949		action->opcode = O_PIPE;
3950		goto chkarg;
3951	case TOK_SKIPTO:
3952		action->opcode = O_SKIPTO;
3953		goto chkarg;
3954	case TOK_NETGRAPH:
3955		action->opcode = O_NETGRAPH;
3956		goto chkarg;
3957	case TOK_NGTEE:
3958		action->opcode = O_NGTEE;
3959		goto chkarg;
3960	case TOK_DIVERT:
3961		action->opcode = O_DIVERT;
3962		goto chkarg;
3963	case TOK_TEE:
3964		action->opcode = O_TEE;
3965		goto chkarg;
3966	case TOK_CALL:
3967		action->opcode = O_CALLRETURN;
3968chkarg:
3969		if (!av[0])
3970			errx(EX_USAGE, "missing argument for %s", *(av - 1));
3971		if (isdigit(**av)) {
3972			action->arg1 = strtoul(*av, NULL, 10);
3973			if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3974				errx(EX_DATAERR, "illegal argument for %s",
3975				    *(av - 1));
3976		} else if (_substrcmp(*av, "tablearg") == 0) {
3977			action->arg1 = IP_FW_TARG;
3978		} else if (i == TOK_DIVERT || i == TOK_TEE) {
3979			struct servent *s;
3980			setservent(1);
3981			s = getservbyname(av[0], "divert");
3982			if (s != NULL)
3983				action->arg1 = ntohs(s->s_port);
3984			else
3985				errx(EX_DATAERR, "illegal divert/tee port");
3986		} else
3987			errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3988		av++;
3989		break;
3990
3991	case TOK_FORWARD: {
3992		/*
3993		 * Locate the address-port separator (':' or ',').
3994		 * Could be one of the following:
3995		 *	hostname:port
3996		 *	IPv4 a.b.c.d,port
3997		 *	IPv4 a.b.c.d:port
3998		 *	IPv6 w:x:y::z,port
3999		 * The ':' can only be used with hostname and IPv4 address.
4000		 * XXX-BZ Should we also support [w:x:y::z]:port?
4001		 */
4002		struct sockaddr_storage result;
4003		struct addrinfo *res;
4004		char *s, *end;
4005		int family;
4006		u_short port_number;
4007
4008		NEED1("missing forward address[:port]");
4009
4010		/*
4011		 * locate the address-port separator (':' or ',')
4012		 */
4013		s = strchr(*av, ',');
4014		if (s == NULL) {
4015			/* Distinguish between IPv4:port and IPv6 cases. */
4016			s = strchr(*av, ':');
4017			if (s && strchr(s+1, ':'))
4018				s = NULL; /* no port */
4019		}
4020
4021		port_number = 0;
4022		if (s != NULL) {
4023			/* Terminate host portion and set s to start of port. */
4024			*(s++) = '\0';
4025			i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
4026			if (s == end)
4027				errx(EX_DATAERR,
4028				    "illegal forwarding port ``%s''", s);
4029			port_number = (u_short)i;
4030		}
4031
4032		if (_substrcmp(*av, "tablearg") == 0) {
4033			family = PF_INET;
4034			((struct sockaddr_in*)&result)->sin_addr.s_addr =
4035			    INADDR_ANY;
4036		} else {
4037			/*
4038			 * Resolve the host name or address to a family and a
4039			 * network representation of the address.
4040			 */
4041			if (getaddrinfo(*av, NULL, NULL, &res))
4042				errx(EX_DATAERR, NULL);
4043			/* Just use the first host in the answer. */
4044			family = res->ai_family;
4045			memcpy(&result, res->ai_addr, res->ai_addrlen);
4046			freeaddrinfo(res);
4047		}
4048
4049 		if (family == PF_INET) {
4050			ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4051
4052			action->opcode = O_FORWARD_IP;
4053			action->len = F_INSN_SIZE(ipfw_insn_sa);
4054			CHECK_ACTLEN;
4055
4056			/*
4057			 * In the kernel we assume AF_INET and use only
4058			 * sin_port and sin_addr. Remember to set sin_len as
4059			 * the routing code seems to use it too.
4060			 */
4061			p->sa.sin_len = sizeof(struct sockaddr_in);
4062			p->sa.sin_family = AF_INET;
4063			p->sa.sin_port = port_number;
4064			p->sa.sin_addr.s_addr =
4065			     ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4066		} else if (family == PF_INET6) {
4067			ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4068
4069			action->opcode = O_FORWARD_IP6;
4070			action->len = F_INSN_SIZE(ipfw_insn_sa6);
4071			CHECK_ACTLEN;
4072
4073			p->sa.sin6_len = sizeof(struct sockaddr_in6);
4074			p->sa.sin6_family = AF_INET6;
4075			p->sa.sin6_port = port_number;
4076			p->sa.sin6_flowinfo = 0;
4077			p->sa.sin6_scope_id =
4078			    ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4079			bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4080			    &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4081		} else {
4082			errx(EX_DATAERR, "Invalid address family in forward action");
4083		}
4084		av++;
4085		break;
4086	    }
4087	case TOK_COMMENT:
4088		/* pretend it is a 'count' rule followed by the comment */
4089		action->opcode = O_COUNT;
4090		av--;		/* go back... */
4091		break;
4092
4093	case TOK_SETFIB:
4094	    {
4095		int numfibs;
4096		size_t intsize = sizeof(int);
4097
4098		action->opcode = O_SETFIB;
4099		NEED1("missing fib number");
4100		if (_substrcmp(*av, "tablearg") == 0) {
4101			action->arg1 = IP_FW_TARG;
4102		} else {
4103		        action->arg1 = strtoul(*av, NULL, 10);
4104			if (sysctlbyname("net.fibs", &numfibs, &intsize,
4105			    NULL, 0) == -1)
4106				errx(EX_DATAERR, "fibs not suported.\n");
4107			if (action->arg1 >= numfibs)  /* Temporary */
4108				errx(EX_DATAERR, "fib too large.\n");
4109			/* Add high-order bit to fib to make room for tablearg*/
4110			action->arg1 |= 0x8000;
4111		}
4112		av++;
4113		break;
4114	    }
4115
4116	case TOK_SETDSCP:
4117	    {
4118		int code;
4119
4120		action->opcode = O_SETDSCP;
4121		NEED1("missing DSCP code");
4122		if (_substrcmp(*av, "tablearg") == 0) {
4123			action->arg1 = IP_FW_TARG;
4124		} else {
4125			if (isalpha(*av[0])) {
4126				if ((code = match_token(f_ipdscp, *av)) == -1)
4127					errx(EX_DATAERR, "Unknown DSCP code");
4128				action->arg1 = code;
4129			} else
4130			        action->arg1 = strtoul(*av, NULL, 10);
4131			/*
4132			 * Add high-order bit to DSCP to make room
4133			 * for tablearg
4134			 */
4135			action->arg1 |= 0x8000;
4136		}
4137		av++;
4138		break;
4139	    }
4140
4141	case TOK_REASS:
4142		action->opcode = O_REASS;
4143		break;
4144
4145	case TOK_RETURN:
4146		fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4147		break;
4148
4149	case TOK_TCPSETMSS: {
4150		u_long mss;
4151		uint16_t idx;
4152
4153		idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4154		if (idx == 0)
4155			errx(EX_DATAERR, "pack_object failed");
4156		fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4157		NEED1("Missing MSS value");
4158		action = next_cmd(action, &ablen);
4159		action->len = 1;
4160		CHECK_ACTLEN;
4161		mss = strtoul(*av, NULL, 10);
4162		if (mss == 0 || mss > UINT16_MAX)
4163			errx(EX_USAGE, "invalid MSS value %s", *av);
4164		fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4165		av++;
4166		break;
4167	}
4168
4169	default:
4170		av--;
4171		if (match_token(rule_eactions, *av) == -1)
4172			errx(EX_DATAERR, "invalid action %s\n", *av);
4173		/*
4174		 * External actions support.
4175		 * XXX: we support only syntax with instance name.
4176		 *	For known external actions (from rule_eactions list)
4177		 *	we can handle syntax directly. But with `eaction'
4178		 *	keyword we can use only `eaction <name> <instance>'
4179		 *	syntax.
4180		 */
4181	case TOK_EACTION: {
4182		uint16_t idx;
4183
4184		NEED1("Missing eaction name");
4185		if (eaction_check_name(*av) != 0)
4186			errx(EX_DATAERR, "Invalid eaction name %s", *av);
4187		idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4188		if (idx == 0)
4189			errx(EX_DATAERR, "pack_object failed");
4190		fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4191		av++;
4192		NEED1("Missing eaction instance name");
4193		action = next_cmd(action, &ablen);
4194		action->len = 1;
4195		CHECK_ACTLEN;
4196		if (eaction_check_name(*av) != 0)
4197			errx(EX_DATAERR, "Invalid eaction instance name %s",
4198			    *av);
4199		/*
4200		 * External action instance object has TLV type depended
4201		 * from the external action name object index. Since we
4202		 * currently don't know this index, use zero as TLV type.
4203		 */
4204		idx = pack_object(tstate, *av, 0);
4205		if (idx == 0)
4206			errx(EX_DATAERR, "pack_object failed");
4207		fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4208		av++;
4209		}
4210	}
4211	action = next_cmd(action, &ablen);
4212
4213	/*
4214	 * [altq queuename] -- altq tag, optional
4215	 * [log [logamount N]]	-- log, optional
4216	 *
4217	 * If they exist, it go first in the cmdbuf, but then it is
4218	 * skipped in the copy section to the end of the buffer.
4219	 */
4220	while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4221		av++;
4222		switch (i) {
4223		case TOK_LOG:
4224		    {
4225			ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4226			int l;
4227
4228			if (have_log)
4229				errx(EX_DATAERR,
4230				    "log cannot be specified more than once");
4231			have_log = (ipfw_insn *)c;
4232			cmd->len = F_INSN_SIZE(ipfw_insn_log);
4233			CHECK_CMDLEN;
4234			cmd->opcode = O_LOG;
4235			if (av[0] && _substrcmp(*av, "logamount") == 0) {
4236				av++;
4237				NEED1("logamount requires argument");
4238				l = atoi(*av);
4239				if (l < 0)
4240					errx(EX_DATAERR,
4241					    "logamount must be positive");
4242				c->max_log = l;
4243				av++;
4244			} else {
4245				len = sizeof(c->max_log);
4246				if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4247				    &c->max_log, &len, NULL, 0) == -1) {
4248					if (co.test_only) {
4249						c->max_log = 0;
4250						break;
4251					}
4252					errx(1, "sysctlbyname(\"%s\")",
4253					    "net.inet.ip.fw.verbose_limit");
4254				}
4255			}
4256		    }
4257			break;
4258
4259#ifndef NO_ALTQ
4260		case TOK_ALTQ:
4261		    {
4262			ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4263
4264			NEED1("missing altq queue name");
4265			if (have_altq)
4266				errx(EX_DATAERR,
4267				    "altq cannot be specified more than once");
4268			have_altq = (ipfw_insn *)a;
4269			cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4270			CHECK_CMDLEN;
4271			cmd->opcode = O_ALTQ;
4272			a->qid = altq_name_to_qid(*av);
4273			av++;
4274		    }
4275			break;
4276#endif
4277
4278		case TOK_TAG:
4279		case TOK_UNTAG: {
4280			uint16_t tag;
4281
4282			if (have_tag)
4283				errx(EX_USAGE, "tag and untag cannot be "
4284				    "specified more than once");
4285			GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4286			   rule_action_params);
4287			have_tag = cmd;
4288			fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4289			av++;
4290			break;
4291		}
4292
4293		default:
4294			abort();
4295		}
4296		cmd = next_cmd(cmd, &cblen);
4297	}
4298
4299	if (have_state)	{ /* must be a check-state, we are done */
4300		if (*av != NULL &&
4301		    match_token(rule_options, *av) == TOK_COMMENT) {
4302			/* check-state has a comment */
4303			av++;
4304			fill_comment(cmd, av, cblen);
4305			cmd = next_cmd(cmd, &cblen);
4306			av[0] = NULL;
4307		}
4308		goto done;
4309	}
4310
4311#define OR_START(target)					\
4312	if (av[0] && (*av[0] == '(' || *av[0] == '{')) { 	\
4313		if (open_par)					\
4314			errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4315		prev = NULL;					\
4316		open_par = 1;					\
4317		if ( (av[0])[1] == '\0') {			\
4318			av++;					\
4319		} else						\
4320			(*av)++;				\
4321	}							\
4322	target:							\
4323
4324
4325#define	CLOSE_PAR						\
4326	if (open_par) {						\
4327		if (av[0] && (					\
4328		    strcmp(*av, ")") == 0 ||			\
4329		    strcmp(*av, "}") == 0)) {			\
4330			prev = NULL;				\
4331			open_par = 0;				\
4332			av++;					\
4333		} else						\
4334			errx(EX_USAGE, "missing \")\"\n");	\
4335	}
4336
4337#define NOT_BLOCK						\
4338	if (av[0] && _substrcmp(*av, "not") == 0) {		\
4339		if (cmd->len & F_NOT)				\
4340			errx(EX_USAGE, "double \"not\" not allowed\n"); \
4341		cmd->len |= F_NOT;				\
4342		av++;						\
4343	}
4344
4345#define OR_BLOCK(target)					\
4346	if (av[0] && _substrcmp(*av, "or") == 0) {		\
4347		if (prev == NULL || open_par == 0)		\
4348			errx(EX_DATAERR, "invalid OR block");	\
4349		prev->len |= F_OR;				\
4350		av++;					\
4351		goto target;					\
4352	}							\
4353	CLOSE_PAR;
4354
4355	first_cmd = cmd;
4356
4357#if 0
4358	/*
4359	 * MAC addresses, optional.
4360	 * If we have this, we skip the part "proto from src to dst"
4361	 * and jump straight to the option parsing.
4362	 */
4363	NOT_BLOCK;
4364	NEED1("missing protocol");
4365	if (_substrcmp(*av, "MAC") == 0 ||
4366	    _substrcmp(*av, "mac") == 0) {
4367		av++;			/* the "MAC" keyword */
4368		add_mac(cmd, av);	/* exits in case of errors */
4369		cmd = next_cmd(cmd);
4370		av += 2;		/* dst-mac and src-mac */
4371		NOT_BLOCK;
4372		NEED1("missing mac type");
4373		if (add_mactype(cmd, av[0]))
4374			cmd = next_cmd(cmd);
4375		av++;			/* any or mac-type */
4376		goto read_options;
4377	}
4378#endif
4379
4380	/*
4381	 * protocol, mandatory
4382	 */
4383    OR_START(get_proto);
4384	NOT_BLOCK;
4385	NEED1("missing protocol");
4386	if (add_proto_compat(cmd, *av, &proto)) {
4387		av++;
4388		if (F_LEN(cmd) != 0) {
4389			prev = cmd;
4390			cmd = next_cmd(cmd, &cblen);
4391		}
4392	} else if (first_cmd != cmd) {
4393		errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4394	} else {
4395		rule->flags |= IPFW_RULE_JUSTOPTS;
4396		goto read_options;
4397	}
4398    OR_BLOCK(get_proto);
4399
4400	first_cmd = cmd; /* update pointer to use in compact form */
4401
4402	/*
4403	 * "from", mandatory
4404	 */
4405	if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4406		errx(EX_USAGE, "missing ``from''");
4407	av++;
4408
4409	/*
4410	 * source IP, mandatory
4411	 */
4412    OR_START(source_ip);
4413	NOT_BLOCK;	/* optional "not" */
4414	NEED1("missing source address");
4415	if (add_src(cmd, *av, proto, cblen, tstate)) {
4416		av++;
4417		if (F_LEN(cmd) != 0) {	/* ! any */
4418			prev = cmd;
4419			cmd = next_cmd(cmd, &cblen);
4420		}
4421	} else
4422		errx(EX_USAGE, "bad source address %s", *av);
4423    OR_BLOCK(source_ip);
4424
4425	/*
4426	 * source ports, optional
4427	 */
4428	NOT_BLOCK;	/* optional "not" */
4429	if ( av[0] != NULL ) {
4430		if (_substrcmp(*av, "any") == 0 ||
4431		    add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4432			av++;
4433			if (F_LEN(cmd) != 0)
4434				cmd = next_cmd(cmd, &cblen);
4435		}
4436	}
4437
4438	/*
4439	 * "to", mandatory
4440	 */
4441	if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4442		errx(EX_USAGE, "missing ``to''");
4443	av++;
4444
4445	/*
4446	 * destination, mandatory
4447	 */
4448    OR_START(dest_ip);
4449	NOT_BLOCK;	/* optional "not" */
4450	NEED1("missing dst address");
4451	if (add_dst(cmd, *av, proto, cblen, tstate)) {
4452		av++;
4453		if (F_LEN(cmd) != 0) {	/* ! any */
4454			prev = cmd;
4455			cmd = next_cmd(cmd, &cblen);
4456		}
4457	} else
4458		errx( EX_USAGE, "bad destination address %s", *av);
4459    OR_BLOCK(dest_ip);
4460
4461	/*
4462	 * dest. ports, optional
4463	 */
4464	NOT_BLOCK;	/* optional "not" */
4465	if (av[0]) {
4466		if (_substrcmp(*av, "any") == 0 ||
4467		    add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4468			av++;
4469			if (F_LEN(cmd) != 0)
4470				cmd = next_cmd(cmd, &cblen);
4471		}
4472	}
4473	if (first_cmd == cmd)
4474		rule->flags |= IPFW_RULE_NOOPT;
4475
4476read_options:
4477	prev = NULL;
4478	while ( av[0] != NULL ) {
4479		char *s;
4480		ipfw_insn_u32 *cmd32;	/* alias for cmd */
4481
4482		s = *av;
4483		cmd32 = (ipfw_insn_u32 *)cmd;
4484
4485		if (*s == '!') {	/* alternate syntax for NOT */
4486			if (cmd->len & F_NOT)
4487				errx(EX_USAGE, "double \"not\" not allowed\n");
4488			cmd->len = F_NOT;
4489			s++;
4490		}
4491		i = match_token(rule_options, s);
4492		av++;
4493		switch(i) {
4494		case TOK_NOT:
4495			if (cmd->len & F_NOT)
4496				errx(EX_USAGE, "double \"not\" not allowed\n");
4497			cmd->len = F_NOT;
4498			break;
4499
4500		case TOK_OR:
4501			if (open_par == 0 || prev == NULL)
4502				errx(EX_USAGE, "invalid \"or\" block\n");
4503			prev->len |= F_OR;
4504			break;
4505
4506		case TOK_STARTBRACE:
4507			if (open_par)
4508				errx(EX_USAGE, "+nested \"(\" not allowed\n");
4509			open_par = 1;
4510			break;
4511
4512		case TOK_ENDBRACE:
4513			if (!open_par)
4514				errx(EX_USAGE, "+missing \")\"\n");
4515			open_par = 0;
4516			prev = NULL;
4517			break;
4518
4519		case TOK_IN:
4520			fill_cmd(cmd, O_IN, 0, 0);
4521			break;
4522
4523		case TOK_OUT:
4524			cmd->len ^= F_NOT; /* toggle F_NOT */
4525			fill_cmd(cmd, O_IN, 0, 0);
4526			break;
4527
4528		case TOK_DIVERTED:
4529			fill_cmd(cmd, O_DIVERTED, 0, 3);
4530			break;
4531
4532		case TOK_DIVERTEDLOOPBACK:
4533			fill_cmd(cmd, O_DIVERTED, 0, 1);
4534			break;
4535
4536		case TOK_DIVERTEDOUTPUT:
4537			fill_cmd(cmd, O_DIVERTED, 0, 2);
4538			break;
4539
4540		case TOK_FRAG:
4541			fill_cmd(cmd, O_FRAG, 0, 0);
4542			break;
4543
4544		case TOK_LAYER2:
4545			fill_cmd(cmd, O_LAYER2, 0, 0);
4546			break;
4547
4548		case TOK_XMIT:
4549		case TOK_RECV:
4550		case TOK_VIA:
4551			NEED1("recv, xmit, via require interface name"
4552				" or address");
4553			fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4554			av++;
4555			if (F_LEN(cmd) == 0)	/* not a valid address */
4556				break;
4557			if (i == TOK_XMIT)
4558				cmd->opcode = O_XMIT;
4559			else if (i == TOK_RECV)
4560				cmd->opcode = O_RECV;
4561			else if (i == TOK_VIA)
4562				cmd->opcode = O_VIA;
4563			break;
4564
4565		case TOK_ICMPTYPES:
4566			NEED1("icmptypes requires list of types");
4567			fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4568			av++;
4569			break;
4570
4571		case TOK_ICMP6TYPES:
4572			NEED1("icmptypes requires list of types");
4573			fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4574			av++;
4575			break;
4576
4577		case TOK_IPTTL:
4578			NEED1("ipttl requires TTL");
4579			if (strpbrk(*av, "-,")) {
4580			    if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4581				errx(EX_DATAERR, "invalid ipttl %s", *av);
4582			} else
4583			    fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4584			av++;
4585			break;
4586
4587		case TOK_IPID:
4588			NEED1("ipid requires id");
4589			if (strpbrk(*av, "-,")) {
4590			    if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4591				errx(EX_DATAERR, "invalid ipid %s", *av);
4592			} else
4593			    fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4594			av++;
4595			break;
4596
4597		case TOK_IPLEN:
4598			NEED1("iplen requires length");
4599			if (strpbrk(*av, "-,")) {
4600			    if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4601				errx(EX_DATAERR, "invalid ip len %s", *av);
4602			} else
4603			    fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4604			av++;
4605			break;
4606
4607		case TOK_IPVER:
4608			NEED1("ipver requires version");
4609			fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4610			av++;
4611			break;
4612
4613		case TOK_IPPRECEDENCE:
4614			NEED1("ipprecedence requires value");
4615			fill_cmd(cmd, O_IPPRECEDENCE, 0,
4616			    (strtoul(*av, NULL, 0) & 7) << 5);
4617			av++;
4618			break;
4619
4620		case TOK_DSCP:
4621			NEED1("missing DSCP code");
4622			fill_dscp(cmd, *av, cblen);
4623			av++;
4624			break;
4625
4626		case TOK_IPOPTS:
4627			NEED1("missing argument for ipoptions");
4628			fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4629			av++;
4630			break;
4631
4632		case TOK_IPTOS:
4633			NEED1("missing argument for iptos");
4634			fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4635			av++;
4636			break;
4637
4638		case TOK_UID:
4639			NEED1("uid requires argument");
4640		    {
4641			char *end;
4642			uid_t uid;
4643			struct passwd *pwd;
4644
4645			cmd->opcode = O_UID;
4646			uid = strtoul(*av, &end, 0);
4647			pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4648			if (pwd == NULL)
4649				errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4650			cmd32->d[0] = pwd->pw_uid;
4651			cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4652			av++;
4653		    }
4654			break;
4655
4656		case TOK_GID:
4657			NEED1("gid requires argument");
4658		    {
4659			char *end;
4660			gid_t gid;
4661			struct group *grp;
4662
4663			cmd->opcode = O_GID;
4664			gid = strtoul(*av, &end, 0);
4665			grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4666			if (grp == NULL)
4667				errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4668			cmd32->d[0] = grp->gr_gid;
4669			cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4670			av++;
4671		    }
4672			break;
4673
4674		case TOK_JAIL:
4675			NEED1("jail requires argument");
4676		    {
4677			char *end;
4678			int jid;
4679
4680			cmd->opcode = O_JAIL;
4681			/*
4682			 * If av is a number, then we'll just pass it as-is.  If
4683			 * it's a name, try to resolve that to a jid.
4684			 *
4685			 * We save the jail_getid(3) call for a fallback because
4686			 * it entails an unconditional trip to the kernel to
4687			 * either validate a jid or resolve a name to a jid.
4688			 * This specific token doesn't currently require a
4689			 * jid to be an active jail, so we save a transition
4690			 * by simply using a number that we're given.
4691			 */
4692			jid = strtoul(*av, &end, 10);
4693			if (*end != '\0') {
4694				jid = jail_getid(*av);
4695				if (jid < 0)
4696				    errx(EX_DATAERR, "%s", jail_errmsg);
4697			}
4698			cmd32->d[0] = (uint32_t)jid;
4699			cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4700			av++;
4701		    }
4702			break;
4703
4704		case TOK_ESTAB:
4705			fill_cmd(cmd, O_ESTAB, 0, 0);
4706			break;
4707
4708		case TOK_SETUP:
4709			fill_cmd(cmd, O_TCPFLAGS, 0,
4710				(TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4711			break;
4712
4713		case TOK_TCPDATALEN:
4714			NEED1("tcpdatalen requires length");
4715			if (strpbrk(*av, "-,")) {
4716			    if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4717				errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4718			} else
4719			    fill_cmd(cmd, O_TCPDATALEN, 0,
4720				    strtoul(*av, NULL, 0));
4721			av++;
4722			break;
4723
4724		case TOK_TCPOPTS:
4725			NEED1("missing argument for tcpoptions");
4726			fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4727			av++;
4728			break;
4729
4730		case TOK_TCPSEQ:
4731		case TOK_TCPACK:
4732			NEED1("tcpseq/tcpack requires argument");
4733			cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4734			cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4735			cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4736			av++;
4737			break;
4738
4739		case TOK_TCPMSS:
4740		case TOK_TCPWIN:
4741			NEED1("tcpmss/tcpwin requires size");
4742			if (strpbrk(*av, "-,")) {
4743				if (add_ports(cmd, *av, 0,
4744				    i == TOK_TCPWIN ? O_TCPWIN : O_TCPMSS,
4745				    cblen) == NULL)
4746					errx(EX_DATAERR, "invalid %s size %s",
4747					    s, *av);
4748			} else
4749				fill_cmd(cmd, i == TOK_TCPWIN ? O_TCPWIN :
4750				    O_TCPMSS, 0, strtoul(*av, NULL, 0));
4751			av++;
4752			break;
4753
4754		case TOK_TCPFLAGS:
4755			NEED1("missing argument for tcpflags");
4756			cmd->opcode = O_TCPFLAGS;
4757			fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4758			av++;
4759			break;
4760
4761		case TOK_KEEPSTATE:
4762		case TOK_RECORDSTATE: {
4763			uint16_t uidx;
4764
4765			if (open_par)
4766				errx(EX_USAGE, "keep-state or record-state cannot be part "
4767				    "of an or block");
4768			if (have_state)
4769				errx(EX_USAGE, "only one of keep-state, record-state, "
4770					" limit and set-limit is allowed");
4771			if (*av != NULL && *av[0] == ':') {
4772				if (state_check_name(*av + 1) != 0)
4773					errx(EX_DATAERR,
4774					    "Invalid state name %s", *av);
4775				uidx = pack_object(tstate, *av + 1,
4776				    IPFW_TLV_STATE_NAME);
4777				av++;
4778			} else
4779				uidx = pack_object(tstate, default_state_name,
4780				    IPFW_TLV_STATE_NAME);
4781			have_state = cmd;
4782			have_rstate = i == TOK_RECORDSTATE;
4783			fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4784			break;
4785		}
4786
4787		case TOK_LIMIT:
4788		case TOK_SETLIMIT: {
4789			ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4790			int val;
4791
4792			if (open_par)
4793				errx(EX_USAGE,
4794				    "limit or set-limit cannot be part of an or block");
4795			if (have_state)
4796				errx(EX_USAGE, "only one of keep-state, record-state, "
4797					" limit and set-limit is allowed");
4798			have_state = cmd;
4799			have_rstate = i == TOK_SETLIMIT;
4800
4801			cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4802			CHECK_CMDLEN;
4803			cmd->opcode = O_LIMIT;
4804			c->limit_mask = c->conn_limit = 0;
4805
4806			while ( av[0] != NULL ) {
4807				if ((val = match_token(limit_masks, *av)) <= 0)
4808					break;
4809				c->limit_mask |= val;
4810				av++;
4811			}
4812
4813			if (c->limit_mask == 0)
4814				errx(EX_USAGE, "limit: missing limit mask");
4815
4816			GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4817			    TOK_LIMIT, rule_options);
4818			av++;
4819
4820			if (*av != NULL && *av[0] == ':') {
4821				if (state_check_name(*av + 1) != 0)
4822					errx(EX_DATAERR,
4823					    "Invalid state name %s", *av);
4824				cmd->arg1 = pack_object(tstate, *av + 1,
4825				    IPFW_TLV_STATE_NAME);
4826				av++;
4827			} else
4828				cmd->arg1 = pack_object(tstate,
4829				    default_state_name, IPFW_TLV_STATE_NAME);
4830			break;
4831		}
4832
4833		case TOK_PROTO:
4834			NEED1("missing protocol");
4835			if (add_proto(cmd, *av, &proto)) {
4836				av++;
4837			} else
4838				errx(EX_DATAERR, "invalid protocol ``%s''",
4839				    *av);
4840			break;
4841
4842		case TOK_SRCIP:
4843			NEED1("missing source IP");
4844			if (add_srcip(cmd, *av, cblen, tstate)) {
4845				av++;
4846			}
4847			break;
4848
4849		case TOK_DSTIP:
4850			NEED1("missing destination IP");
4851			if (add_dstip(cmd, *av, cblen, tstate)) {
4852				av++;
4853			}
4854			break;
4855
4856		case TOK_SRCIP6:
4857			NEED1("missing source IP6");
4858			if (add_srcip6(cmd, *av, cblen, tstate)) {
4859				av++;
4860			}
4861			break;
4862
4863		case TOK_DSTIP6:
4864			NEED1("missing destination IP6");
4865			if (add_dstip6(cmd, *av, cblen, tstate)) {
4866				av++;
4867			}
4868			break;
4869
4870		case TOK_SRCPORT:
4871			NEED1("missing source port");
4872			if (_substrcmp(*av, "any") == 0 ||
4873			    add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4874				av++;
4875			} else
4876				errx(EX_DATAERR, "invalid source port %s", *av);
4877			break;
4878
4879		case TOK_DSTPORT:
4880			NEED1("missing destination port");
4881			if (_substrcmp(*av, "any") == 0 ||
4882			    add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4883				av++;
4884			} else
4885				errx(EX_DATAERR, "invalid destination port %s",
4886				    *av);
4887			break;
4888
4889		case TOK_MAC:
4890			if (add_mac(cmd, av, cblen))
4891				av += 2;
4892			break;
4893
4894		case TOK_MACTYPE:
4895			NEED1("missing mac type");
4896			if (!add_mactype(cmd, *av, cblen))
4897				errx(EX_DATAERR, "invalid mac type %s", *av);
4898			av++;
4899			break;
4900
4901		case TOK_VERREVPATH:
4902			fill_cmd(cmd, O_VERREVPATH, 0, 0);
4903			break;
4904
4905		case TOK_VERSRCREACH:
4906			fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4907			break;
4908
4909		case TOK_ANTISPOOF:
4910			fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4911			break;
4912
4913		case TOK_IPSEC:
4914			fill_cmd(cmd, O_IPSEC, 0, 0);
4915			break;
4916
4917		case TOK_IPV6:
4918			fill_cmd(cmd, O_IP6, 0, 0);
4919			break;
4920
4921		case TOK_IPV4:
4922			fill_cmd(cmd, O_IP4, 0, 0);
4923			break;
4924
4925		case TOK_EXT6HDR:
4926			fill_ext6hdr( cmd, *av );
4927			av++;
4928			break;
4929
4930		case TOK_FLOWID:
4931			if (proto != IPPROTO_IPV6 )
4932				errx( EX_USAGE, "flow-id filter is active "
4933				    "only for ipv6 protocol\n");
4934			fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4935			av++;
4936			break;
4937
4938		case TOK_COMMENT:
4939			fill_comment(cmd, av, cblen);
4940			av[0]=NULL;
4941			break;
4942
4943		case TOK_TAGGED:
4944			if (av[0] && strpbrk(*av, "-,")) {
4945				if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4946					errx(EX_DATAERR, "tagged: invalid tag"
4947					    " list: %s", *av);
4948			}
4949			else {
4950				uint16_t tag;
4951
4952				GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4953				    TOK_TAGGED, rule_options);
4954				fill_cmd(cmd, O_TAGGED, 0, tag);
4955			}
4956			av++;
4957			break;
4958
4959		case TOK_FIB:
4960			NEED1("fib requires fib number");
4961			fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4962			av++;
4963			break;
4964		case TOK_SOCKARG:
4965			fill_cmd(cmd, O_SOCKARG, 0, 0);
4966			break;
4967
4968		case TOK_LOOKUP: {
4969			ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4970			int j;
4971
4972			if (!av[0] || !av[1])
4973				errx(EX_USAGE, "format: lookup argument tablenum");
4974			cmd->opcode = O_IP_DST_LOOKUP;
4975			cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4976			i = match_token(rule_options, *av);
4977			for (j = 0; lookup_key[j] >= 0 ; j++) {
4978				if (i == lookup_key[j])
4979					break;
4980			}
4981			if (lookup_key[j] <= 0)
4982				errx(EX_USAGE, "format: cannot lookup on %s", *av);
4983			__PAST_END(c->d, 1) = j; // i converted to option
4984			av++;
4985
4986			if ((j = pack_table(tstate, *av)) == 0)
4987				errx(EX_DATAERR, "Invalid table name: %s", *av);
4988
4989			cmd->arg1 = j;
4990			av++;
4991		    }
4992			break;
4993		case TOK_FLOW:
4994			NEED1("missing table name");
4995			if (strncmp(*av, "table(", 6) != 0)
4996				errx(EX_DATAERR,
4997				    "enclose table name into \"table()\"");
4998			fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4999			av++;
5000			break;
5001
5002		case TOK_SKIPACTION:
5003			if (have_skipcmd)
5004				errx(EX_USAGE, "only one defer-action "
5005					"is allowed");
5006			have_skipcmd = cmd;
5007			fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
5008			break;
5009
5010		default:
5011			errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
5012		}
5013		if (F_LEN(cmd) > 0) {	/* prepare to advance */
5014			prev = cmd;
5015			cmd = next_cmd(cmd, &cblen);
5016		}
5017	}
5018
5019done:
5020
5021	if (!have_state && have_skipcmd)
5022		warnx("Rule contains \"defer-immediate-action\" "
5023			"and doesn't contain any state-related options.");
5024
5025	/*
5026	 * Now copy stuff into the rule.
5027	 * If we have a keep-state option, the first instruction
5028	 * must be a PROBE_STATE (which is generated here).
5029	 * If we have a LOG option, it was stored as the first command,
5030	 * and now must be moved to the top of the action part.
5031	 */
5032	dst = (ipfw_insn *)rule->cmd;
5033
5034	/*
5035	 * First thing to write into the command stream is the match probability.
5036	 */
5037	if (match_prob != 1) { /* 1 means always match */
5038		dst->opcode = O_PROB;
5039		dst->len = 2;
5040		*((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
5041		dst += dst->len;
5042	}
5043
5044	/*
5045	 * generate O_PROBE_STATE if necessary
5046	 */
5047	if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
5048		fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
5049		dst = next_cmd(dst, &rblen);
5050	}
5051
5052	/*
5053	 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
5054	 * O_SKIP_ACTION
5055	 */
5056	for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
5057		i = F_LEN(src);
5058		CHECK_RBUFLEN(i);
5059
5060		switch (src->opcode) {
5061		case O_LOG:
5062		case O_KEEP_STATE:
5063		case O_LIMIT:
5064		case O_ALTQ:
5065		case O_TAG:
5066		case O_SKIP_ACTION:
5067			break;
5068		default:
5069			bcopy(src, dst, i * sizeof(uint32_t));
5070			dst += i;
5071		}
5072	}
5073
5074	/*
5075	 * put back the have_state command as last opcode
5076	 */
5077	if (have_state && have_state->opcode != O_CHECK_STATE) {
5078		i = F_LEN(have_state);
5079		CHECK_RBUFLEN(i);
5080		bcopy(have_state, dst, i * sizeof(uint32_t));
5081		dst += i;
5082	}
5083
5084	/*
5085	 * put back the have_skipcmd command as very last opcode
5086	 */
5087	if (have_skipcmd) {
5088		i = F_LEN(have_skipcmd);
5089		CHECK_RBUFLEN(i);
5090		bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5091		dst += i;
5092	}
5093
5094	/*
5095	 * start action section
5096	 */
5097	rule->act_ofs = dst - rule->cmd;
5098
5099	/* put back O_LOG, O_ALTQ, O_TAG if necessary */
5100	if (have_log) {
5101		i = F_LEN(have_log);
5102		CHECK_RBUFLEN(i);
5103		bcopy(have_log, dst, i * sizeof(uint32_t));
5104		dst += i;
5105	}
5106	if (have_altq) {
5107		i = F_LEN(have_altq);
5108		CHECK_RBUFLEN(i);
5109		bcopy(have_altq, dst, i * sizeof(uint32_t));
5110		dst += i;
5111	}
5112	if (have_tag) {
5113		i = F_LEN(have_tag);
5114		CHECK_RBUFLEN(i);
5115		bcopy(have_tag, dst, i * sizeof(uint32_t));
5116		dst += i;
5117	}
5118
5119	/*
5120	 * copy all other actions
5121	 */
5122	for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5123		i = F_LEN(src);
5124		CHECK_RBUFLEN(i);
5125		bcopy(src, dst, i * sizeof(uint32_t));
5126		dst += i;
5127	}
5128
5129	rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5130	*rbufsize = (char *)dst - (char *)rule;
5131}
5132
5133static int
5134compare_ntlv(const void *_a, const void *_b)
5135{
5136	ipfw_obj_ntlv *a, *b;
5137
5138	a = (ipfw_obj_ntlv *)_a;
5139	b = (ipfw_obj_ntlv *)_b;
5140
5141	if (a->set < b->set)
5142		return (-1);
5143	else if (a->set > b->set)
5144		return (1);
5145
5146	if (a->idx < b->idx)
5147		return (-1);
5148	else if (a->idx > b->idx)
5149		return (1);
5150
5151	if (a->head.type < b->head.type)
5152		return (-1);
5153	else if (a->head.type > b->head.type)
5154		return (1);
5155
5156	return (0);
5157}
5158
5159/*
5160 * Provide kernel with sorted list of referenced objects
5161 */
5162static void
5163object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5164{
5165
5166	qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5167}
5168
5169struct object_kt {
5170	uint16_t	uidx;
5171	uint16_t	type;
5172};
5173static int
5174compare_object_kntlv(const void *k, const void *v)
5175{
5176	ipfw_obj_ntlv *ntlv;
5177	struct object_kt key;
5178
5179	key = *((struct object_kt *)k);
5180	ntlv = (ipfw_obj_ntlv *)v;
5181
5182	if (key.uidx < ntlv->idx)
5183		return (-1);
5184	else if (key.uidx > ntlv->idx)
5185		return (1);
5186
5187	if (key.type < ntlv->head.type)
5188		return (-1);
5189	else if (key.type > ntlv->head.type)
5190		return (1);
5191
5192	return (0);
5193}
5194
5195/*
5196 * Finds object name in @ctlv by @idx and @type.
5197 * Uses the following facts:
5198 * 1) All TLVs are the same size
5199 * 2) Kernel implementation provides already sorted list.
5200 *
5201 * Returns table name or NULL.
5202 */
5203static char *
5204object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5205{
5206	ipfw_obj_ntlv *ntlv;
5207	struct object_kt key;
5208
5209	key.uidx = idx;
5210	key.type = type;
5211
5212	ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5213	    compare_object_kntlv);
5214
5215	if (ntlv != NULL)
5216		return (ntlv->name);
5217
5218	return (NULL);
5219}
5220
5221static char *
5222table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5223{
5224
5225	return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5226}
5227
5228/*
5229 * Adds one or more rules to ipfw chain.
5230 * Data layout:
5231 * Request:
5232 * [
5233 *   ip_fw3_opheader
5234 *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5235 *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5236 * ]
5237 * Reply:
5238 * [
5239 *   ip_fw3_opheader
5240 *   [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5241 *   [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5242 * ]
5243 *
5244 * Rules in reply are modified to store their actual ruleset number.
5245 *
5246 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5247 * according to their idx field and there has to be no duplicates.
5248 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5249 * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5250 */
5251void
5252ipfw_add(char *av[])
5253{
5254	uint32_t rulebuf[1024];
5255	int rbufsize, default_off, tlen, rlen;
5256	size_t sz;
5257	struct tidx ts;
5258	struct ip_fw_rule *rule;
5259	caddr_t tbuf;
5260	ip_fw3_opheader *op3;
5261	ipfw_obj_ctlv *ctlv, *tstate;
5262
5263	rbufsize = sizeof(rulebuf);
5264	memset(rulebuf, 0, rbufsize);
5265	memset(&ts, 0, sizeof(ts));
5266
5267	/* Optimize case with no tables */
5268	default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5269	op3 = (ip_fw3_opheader *)rulebuf;
5270	ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5271	rule = (struct ip_fw_rule *)(ctlv + 1);
5272	rbufsize -= default_off;
5273
5274	compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5275	/* Align rule size to u64 boundary */
5276	rlen = roundup2(rbufsize, sizeof(uint64_t));
5277
5278	tbuf = NULL;
5279	sz = 0;
5280	tstate = NULL;
5281	if (ts.count != 0) {
5282		/* Some tables. We have to alloc more data */
5283		tlen = ts.count * sizeof(ipfw_obj_ntlv);
5284		sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5285
5286		if ((tbuf = calloc(1, sz)) == NULL)
5287			err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5288		op3 = (ip_fw3_opheader *)tbuf;
5289		/* Tables first */
5290		ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5291		ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5292		ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5293		ctlv->count = ts.count;
5294		ctlv->objsize = sizeof(ipfw_obj_ntlv);
5295		memcpy(ctlv + 1, ts.idx, tlen);
5296		object_sort_ctlv(ctlv);
5297		tstate = ctlv;
5298		/* Rule next */
5299		ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5300		ctlv->head.type = IPFW_TLV_RULE_LIST;
5301		ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5302		ctlv->count = 1;
5303		memcpy(ctlv + 1, rule, rbufsize);
5304	} else {
5305		/* Simply add header */
5306		sz = rlen + default_off;
5307		memset(ctlv, 0, sizeof(*ctlv));
5308		ctlv->head.type = IPFW_TLV_RULE_LIST;
5309		ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5310		ctlv->count = 1;
5311	}
5312
5313	if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5314		err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5315
5316	if (!co.do_quiet) {
5317		struct format_opts sfo;
5318		struct buf_pr bp;
5319		memset(&sfo, 0, sizeof(sfo));
5320		sfo.tstate = tstate;
5321		sfo.set_mask = (uint32_t)(-1);
5322		bp_alloc(&bp, 4096);
5323		show_static_rule(&co, &sfo, &bp, rule, NULL);
5324		printf("%s", bp.buf);
5325		bp_free(&bp);
5326	}
5327
5328	if (tbuf != NULL)
5329		free(tbuf);
5330
5331	if (ts.idx != NULL)
5332		free(ts.idx);
5333}
5334
5335/*
5336 * clear the counters or the log counters.
5337 * optname has the following values:
5338 *  0 (zero both counters and logging)
5339 *  1 (zero logging only)
5340 */
5341void
5342ipfw_zero(int ac, char *av[], int optname)
5343{
5344	ipfw_range_tlv rt;
5345	char const *errstr;
5346	char const *name = optname ? "RESETLOG" : "ZERO";
5347	uint32_t arg;
5348	int failed = EX_OK;
5349
5350	optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5351	av++; ac--;
5352
5353	if (ac == 0) {
5354		/* clear all entries */
5355		memset(&rt, 0, sizeof(rt));
5356		rt.flags = IPFW_RCFLAG_ALL;
5357		if (do_range_cmd(optname, &rt) < 0)
5358			err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5359		if (!co.do_quiet)
5360			printf("%s.\n", optname == IP_FW_XZERO ?
5361			    "Accounting cleared":"Logging counts reset");
5362
5363		return;
5364	}
5365
5366	while (ac) {
5367		/* Rule number */
5368		if (isdigit(**av)) {
5369			arg = strtonum(*av, 0, 0xffff, &errstr);
5370			if (errstr)
5371				errx(EX_DATAERR,
5372				    "invalid rule number %s\n", *av);
5373			memset(&rt, 0, sizeof(rt));
5374			rt.start_rule = arg;
5375			rt.end_rule = arg;
5376			rt.flags |= IPFW_RCFLAG_RANGE;
5377			if (co.use_set != 0) {
5378				rt.set = co.use_set - 1;
5379				rt.flags |= IPFW_RCFLAG_SET;
5380			}
5381			if (do_range_cmd(optname, &rt) != 0) {
5382				warn("rule %u: setsockopt(IP_FW_X%s)",
5383				    arg, name);
5384				failed = EX_UNAVAILABLE;
5385			} else if (rt.new_set == 0) {
5386				printf("Entry %d not found\n", arg);
5387				failed = EX_UNAVAILABLE;
5388			} else if (!co.do_quiet)
5389				printf("Entry %d %s.\n", arg,
5390				    optname == IP_FW_XZERO ?
5391					"cleared" : "logging count reset");
5392		} else {
5393			errx(EX_USAGE, "invalid rule number ``%s''", *av);
5394		}
5395		av++; ac--;
5396	}
5397	if (failed != EX_OK)
5398		exit(failed);
5399}
5400
5401void
5402ipfw_flush(int force)
5403{
5404	ipfw_range_tlv rt;
5405
5406	if (!force && !co.do_quiet) { /* need to ask user */
5407		int c;
5408
5409		printf("Are you sure? [yn] ");
5410		fflush(stdout);
5411		do {
5412			c = toupper(getc(stdin));
5413			while (c != '\n' && getc(stdin) != '\n')
5414				if (feof(stdin))
5415					return; /* and do not flush */
5416		} while (c != 'Y' && c != 'N');
5417		printf("\n");
5418		if (c == 'N')	/* user said no */
5419			return;
5420	}
5421	if (co.do_pipe) {
5422		dummynet_flush();
5423		return;
5424	}
5425	/* `ipfw set N flush` - is the same that `ipfw delete set N` */
5426	memset(&rt, 0, sizeof(rt));
5427	if (co.use_set != 0) {
5428		rt.set = co.use_set - 1;
5429		rt.flags = IPFW_RCFLAG_SET;
5430	} else
5431		rt.flags = IPFW_RCFLAG_ALL;
5432	if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5433			err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5434	if (!co.do_quiet)
5435		printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5436}
5437
5438static struct _s_x intcmds[] = {
5439      { "talist",	TOK_TALIST },
5440      { "iflist",	TOK_IFLIST },
5441      { "olist",	TOK_OLIST },
5442      { "vlist",	TOK_VLIST },
5443      { NULL, 0 }
5444};
5445
5446static struct _s_x otypes[] = {
5447	{ "EACTION",	IPFW_TLV_EACTION },
5448	{ "DYNSTATE",	IPFW_TLV_STATE_NAME },
5449	{ NULL, 0 }
5450};
5451
5452static const char*
5453lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5454{
5455	const char *name;
5456	int i;
5457
5458	name = NULL;
5459	for (i = 0; i < cnt; i++) {
5460		if (ntlv[i].head.type != IPFW_TLV_EACTION)
5461			continue;
5462		if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5463			continue;
5464		name = ntlv[i].name;
5465		break;
5466	}
5467	return (name);
5468}
5469
5470static void
5471ipfw_list_objects(int ac, char *av[])
5472{
5473	ipfw_obj_lheader req, *olh;
5474	ipfw_obj_ntlv *ntlv;
5475	const char *name;
5476	size_t sz;
5477	int i;
5478
5479	memset(&req, 0, sizeof(req));
5480	sz = sizeof(req);
5481	if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5482		if (errno != ENOMEM)
5483			return;
5484
5485	sz = req.size;
5486	if ((olh = calloc(1, sz)) == NULL)
5487		return;
5488
5489	olh->size = sz;
5490	if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5491		free(olh);
5492		return;
5493	}
5494
5495	if (olh->count > 0)
5496		printf("Objects list:\n");
5497	else
5498		printf("There are no objects\n");
5499	ntlv = (ipfw_obj_ntlv *)(olh + 1);
5500	for (i = 0; i < olh->count; i++) {
5501		name = match_value(otypes, ntlv->head.type);
5502		if (name == NULL)
5503			name = lookup_eaction_name(
5504			    (ipfw_obj_ntlv *)(olh + 1), olh->count,
5505			    ntlv->head.type);
5506		if (name == NULL)
5507			printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5508			    ntlv->idx, ntlv->head.type, ntlv->name);
5509		else
5510			printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5511			    ntlv->idx, name, ntlv->name);
5512		ntlv++;
5513	}
5514	free(olh);
5515}
5516
5517void
5518ipfw_internal_handler(int ac, char *av[])
5519{
5520	int tcmd;
5521
5522	ac--; av++;
5523	NEED1("internal cmd required");
5524
5525	if ((tcmd = match_token(intcmds, *av)) == -1)
5526		errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5527
5528	switch (tcmd) {
5529	case TOK_IFLIST:
5530		ipfw_list_tifaces();
5531		break;
5532	case TOK_TALIST:
5533		ipfw_list_ta(ac, av);
5534		break;
5535	case TOK_OLIST:
5536		ipfw_list_objects(ac, av);
5537		break;
5538	case TOK_VLIST:
5539		ipfw_list_values(ac, av);
5540		break;
5541	}
5542}
5543
5544static int
5545ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5546{
5547	ipfw_obj_lheader req, *olh;
5548	size_t sz;
5549
5550	memset(&req, 0, sizeof(req));
5551	sz = sizeof(req);
5552
5553	if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5554		if (errno != ENOMEM)
5555			return (errno);
5556	}
5557
5558	sz = req.size;
5559	if ((olh = calloc(1, sz)) == NULL)
5560		return (ENOMEM);
5561
5562	olh->size = sz;
5563	if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5564		free(olh);
5565		return (errno);
5566	}
5567
5568	*polh = olh;
5569	return (0);
5570}
5571
5572static int
5573ifinfo_cmp(const void *a, const void *b)
5574{
5575	ipfw_iface_info *ia, *ib;
5576
5577	ia = (ipfw_iface_info *)a;
5578	ib = (ipfw_iface_info *)b;
5579
5580	return (stringnum_cmp(ia->ifname, ib->ifname));
5581}
5582
5583/*
5584 * Retrieves table list from kernel,
5585 * optionally sorts it and calls requested function for each table.
5586 * Returns 0 on success.
5587 */
5588static void
5589ipfw_list_tifaces()
5590{
5591	ipfw_obj_lheader *olh;
5592	ipfw_iface_info *info;
5593	int i, error;
5594
5595	if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5596		err(EX_OSERR, "Unable to request ipfw tracked interface list");
5597
5598
5599	qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5600
5601	info = (ipfw_iface_info *)(olh + 1);
5602	for (i = 0; i < olh->count; i++) {
5603		if (info->flags & IPFW_IFFLAG_RESOLVED)
5604			printf("%s ifindex: %d refcount: %u changes: %u\n",
5605			    info->ifname, info->ifindex, info->refcnt,
5606			    info->gencnt);
5607		else
5608			printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5609			    info->ifname, info->refcnt, info->gencnt);
5610		info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);
5611	}
5612
5613	free(olh);
5614}
5615
5616
5617
5618
5619