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: head/sbin/ipfw/ipfw2.c 162344 2006-09-16 06:34:30Z jhay $
21 */
22
23#include <sys/param.h>
24#include <sys/mbuf.h>
25#include <sys/socket.h>
26#include <sys/sockio.h>
27#include <sys/sysctl.h>
28#include <sys/time.h>
29#include <sys/wait.h>
30#include <sys/queue.h>
31
32#include <ctype.h>
33#include <err.h>
34#include <errno.h>
35#include <grp.h>
36#include <limits.h>
37#include <netdb.h>
38#include <pwd.h>
39#include <signal.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <stdarg.h>
43#include <string.h>
44#include <timeconv.h> /* XXX do we need this ? */
45#include <unistd.h>
46#include <sysexits.h>
47#include <unistd.h>
48#include <fcntl.h>
49
50#include <net/if.h>
51#include <net/pfvar.h>
52#include <net/route.h> /* def. of struct route */
53#include <netinet/in.h>
54#include <netinet/in_systm.h>
55#include <netinet/ip.h>
56#include <netinet/ip_icmp.h>
57#include <netinet/icmp6.h>
58#include <netinet/ip_fw.h>
59#include <netinet/ip_dummynet.h>
60#include <netinet/tcp.h>
61#include <arpa/inet.h>
62
63int
64 do_resolv, /* Would try to resolve all */
65 do_time, /* Show time stamps */
66 do_quiet, /* Be quiet in add and flush */
67 do_pipe, /* this cmd refers to a pipe */
68 do_sort, /* field to sort results (0 = no) */
69 do_dynamic, /* display dynamic rules */
70 do_expired, /* display expired dynamic rules */
71 do_compact, /* show rules in compact mode */
72 do_force, /* do not ask for confirmation */
73 show_sets, /* display rule sets */
74 test_only, /* only check syntax */
75 comment_only, /* only print action and comment */
76 verbose;
77
78#define IP_MASK_ALL 0xffffffff
79/*
80 * the following macro returns an error message if we run out of
81 * arguments.
82 */
83#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
84
85#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
86 if (!ac) \
87 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
88 if (_substrcmp(*av, "tablearg") == 0) { \
89 arg = IP_FW_TABLEARG; \
90 break; \
91 } \
92 \
93 { \
94 long val; \
95 char *end; \
96 \
97 val = strtol(*av, &end, 10); \
98 \
99 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \
100 errx(EX_DATAERR, "%s: invalid argument: %s", \
101 match_value(s_x, tok), *av); \
102 \
103 if (errno == ERANGE || val < min || val > max) \
104 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
105 match_value(s_x, tok), min, max, *av); \
106 \
107 if (val == IP_FW_TABLEARG) \
108 errx(EX_DATAERR, "%s: illegal argument value: %s", \
109 match_value(s_x, tok), *av); \
110 arg = val; \
111 } \
112} while (0)
113
114#define PRINT_UINT_ARG(str, arg) do { \
115 if (str != NULL) \
116 printf("%s",str); \
117 if (arg == IP_FW_TABLEARG) \
118 printf("tablearg"); \
119 else \
120 printf("%u", (uint32_t)arg); \
121} while (0)
122
123/*
124 * _s_x is a structure that stores a string <-> token pairs, used in
125 * various places in the parser. Entries are stored in arrays,
126 * with an entry with s=NULL as terminator.
127 * The search routines are match_token() and match_value().
128 * Often, an element with x=0 contains an error string.
129 *
130 */
131struct _s_x {
132 char const *s;
133 int x;
134};
135
136static struct _s_x f_tcpflags[] = {
137 { "syn", TH_SYN },
138 { "fin", TH_FIN },
139 { "ack", TH_ACK },
140 { "psh", TH_PUSH },
141 { "rst", TH_RST },
142 { "urg", TH_URG },
143 { "tcp flag", 0 },
144 { NULL, 0 }
145};
146
147static struct _s_x f_tcpopts[] = {
148 { "mss", IP_FW_TCPOPT_MSS },
149 { "maxseg", IP_FW_TCPOPT_MSS },
150 { "window", IP_FW_TCPOPT_WINDOW },
151 { "sack", IP_FW_TCPOPT_SACK },
152 { "ts", IP_FW_TCPOPT_TS },
153 { "timestamp", IP_FW_TCPOPT_TS },
154 { "cc", IP_FW_TCPOPT_CC },
155 { "tcp option", 0 },
156 { NULL, 0 }
157};
158
159/*
160 * IP options span the range 0 to 255 so we need to remap them
161 * (though in fact only the low 5 bits are significant).
162 */
163static struct _s_x f_ipopts[] = {
164 { "ssrr", IP_FW_IPOPT_SSRR},
165 { "lsrr", IP_FW_IPOPT_LSRR},
166 { "rr", IP_FW_IPOPT_RR},
167 { "ts", IP_FW_IPOPT_TS},
168 { "ip option", 0 },
169 { NULL, 0 }
170};
171
172static struct _s_x f_iptos[] = {
173 { "lowdelay", IPTOS_LOWDELAY},
174 { "throughput", IPTOS_THROUGHPUT},
175 { "reliability", IPTOS_RELIABILITY},
176 { "mincost", IPTOS_MINCOST},
177 { "congestion", IPTOS_CE},
178 { "ecntransport", IPTOS_ECT},
179 { "ip tos option", 0},
180 { NULL, 0 }
181};
182
183static struct _s_x limit_masks[] = {
184 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
185 {"src-addr", DYN_SRC_ADDR},
186 {"src-port", DYN_SRC_PORT},
187 {"dst-addr", DYN_DST_ADDR},
188 {"dst-port", DYN_DST_PORT},
189 {NULL, 0}
190};
191
192/*
193 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
194 * This is only used in this code.
195 */
196#define IPPROTO_ETHERTYPE 0x1000
197static struct _s_x ether_types[] = {
198 /*
199 * Note, we cannot use "-:&/" in the names because they are field
200 * separators in the type specifications. Also, we use s = NULL as
201 * end-delimiter, because a type of 0 can be legal.
202 */
203 { "ip", 0x0800 },
204 { "ipv4", 0x0800 },
205 { "ipv6", 0x86dd },
206 { "arp", 0x0806 },
207 { "rarp", 0x8035 },
208 { "vlan", 0x8100 },
209 { "loop", 0x9000 },
210 { "trail", 0x1000 },
211 { "at", 0x809b },
212 { "atalk", 0x809b },
213 { "aarp", 0x80f3 },
214 { "pppoe_disc", 0x8863 },
215 { "pppoe_sess", 0x8864 },
216 { "ipx_8022", 0x00E0 },
217 { "ipx_8023", 0x0000 },
218 { "ipx_ii", 0x8137 },
219 { "ipx_snap", 0x8137 },
220 { "ipx", 0x8137 },
221 { "ns", 0x0600 },
222 { NULL, 0 }
223};
224
225static void show_usage(void);
226
227enum tokens {
228 TOK_NULL=0,
229
230 TOK_OR,
231 TOK_NOT,
232 TOK_STARTBRACE,
233 TOK_ENDBRACE,
234
235 TOK_ACCEPT,
236 TOK_COUNT,
237 TOK_PIPE,
238 TOK_QUEUE,
239 TOK_DIVERT,
240 TOK_TEE,
241 TOK_NETGRAPH,
242 TOK_NGTEE,
243 TOK_FORWARD,
244 TOK_SKIPTO,
245 TOK_DENY,
246 TOK_REJECT,
247 TOK_RESET,
248 TOK_UNREACH,
249 TOK_CHECKSTATE,
250
251 TOK_ALTQ,
252 TOK_LOG,
253 TOK_TAG,
254 TOK_UNTAG,
255
256 TOK_TAGGED,
257 TOK_UID,
258 TOK_GID,
259 TOK_JAIL,
260 TOK_IN,
261 TOK_LIMIT,
262 TOK_KEEPSTATE,
263 TOK_LAYER2,
264 TOK_OUT,
265 TOK_DIVERTED,
266 TOK_DIVERTEDLOOPBACK,
267 TOK_DIVERTEDOUTPUT,
268 TOK_XMIT,
269 TOK_RECV,
270 TOK_VIA,
271 TOK_FRAG,
272 TOK_IPOPTS,
273 TOK_IPLEN,
274 TOK_IPID,
275 TOK_IPPRECEDENCE,
276 TOK_IPTOS,
277 TOK_IPTTL,
278 TOK_IPVER,
279 TOK_ESTAB,
280 TOK_SETUP,
281 TOK_TCPDATALEN,
282 TOK_TCPFLAGS,
283 TOK_TCPOPTS,
284 TOK_TCPSEQ,
285 TOK_TCPACK,
286 TOK_TCPWIN,
287 TOK_ICMPTYPES,
288 TOK_MAC,
289 TOK_MACTYPE,
290 TOK_VERREVPATH,
291 TOK_VERSRCREACH,
292 TOK_ANTISPOOF,
293 TOK_IPSEC,
294 TOK_COMMENT,
295
296 TOK_PLR,
297 TOK_NOERROR,
298 TOK_BUCKETS,
299 TOK_DSTIP,
300 TOK_SRCIP,
301 TOK_DSTPORT,
302 TOK_SRCPORT,
303 TOK_ALL,
304 TOK_MASK,
305 TOK_BW,
306 TOK_DELAY,
307 TOK_RED,
308 TOK_GRED,
309 TOK_DROPTAIL,
310 TOK_PROTO,
311 TOK_WEIGHT,
312
313 TOK_IPV6,
314 TOK_FLOWID,
315 TOK_ICMP6TYPES,
316 TOK_EXT6HDR,
317 TOK_DSTIP6,
318 TOK_SRCIP6,
319
320 TOK_IPV4,
321 TOK_UNREACH6,
322 TOK_RESET6,
323};
324
325struct _s_x dummynet_params[] = {
326 { "plr", TOK_PLR },
327 { "noerror", TOK_NOERROR },
328 { "buckets", TOK_BUCKETS },
329 { "dst-ip", TOK_DSTIP },
330 { "src-ip", TOK_SRCIP },
331 { "dst-port", TOK_DSTPORT },
332 { "src-port", TOK_SRCPORT },
333 { "proto", TOK_PROTO },
334 { "weight", TOK_WEIGHT },
335 { "all", TOK_ALL },
336 { "mask", TOK_MASK },
337 { "droptail", TOK_DROPTAIL },
338 { "red", TOK_RED },
339 { "gred", TOK_GRED },
340 { "bw", TOK_BW },
341 { "bandwidth", TOK_BW },
342 { "delay", TOK_DELAY },
343 { "pipe", TOK_PIPE },
344 { "queue", TOK_QUEUE },
345 { "flow-id", TOK_FLOWID},
346 { "dst-ipv6", TOK_DSTIP6},
347 { "dst-ip6", TOK_DSTIP6},
348 { "src-ipv6", TOK_SRCIP6},
349 { "src-ip6", TOK_SRCIP6},
350 { "dummynet-params", TOK_NULL },
351 { NULL, 0 } /* terminator */
352};
353
354struct _s_x rule_actions[] = {
355 { "accept", TOK_ACCEPT },
356 { "pass", TOK_ACCEPT },
357 { "allow", TOK_ACCEPT },
358 { "permit", TOK_ACCEPT },
359 { "count", TOK_COUNT },
360 { "pipe", TOK_PIPE },
361 { "queue", TOK_QUEUE },
362 { "divert", TOK_DIVERT },
363 { "tee", TOK_TEE },
364 { "netgraph", TOK_NETGRAPH },
365 { "ngtee", TOK_NGTEE },
366 { "fwd", TOK_FORWARD },
367 { "forward", TOK_FORWARD },
368 { "skipto", TOK_SKIPTO },
369 { "deny", TOK_DENY },
370 { "drop", TOK_DENY },
371 { "reject", TOK_REJECT },
372 { "reset6", TOK_RESET6 },
373 { "reset", TOK_RESET },
374 { "unreach6", TOK_UNREACH6 },
375 { "unreach", TOK_UNREACH },
376 { "check-state", TOK_CHECKSTATE },
377 { "//", TOK_COMMENT },
378 { NULL, 0 } /* terminator */
379};
380
381struct _s_x rule_action_params[] = {
382 { "altq", TOK_ALTQ },
383 { "log", TOK_LOG },
384 { "tag", TOK_TAG },
385 { "untag", TOK_UNTAG },
386 { NULL, 0 } /* terminator */
387};
388
389struct _s_x rule_options[] = {
390 { "tagged", TOK_TAGGED },
391 { "uid", TOK_UID },
392 { "gid", TOK_GID },
393 { "jail", TOK_JAIL },
394 { "in", TOK_IN },
395 { "limit", TOK_LIMIT },
396 { "keep-state", TOK_KEEPSTATE },
397 { "bridged", TOK_LAYER2 },
398 { "layer2", TOK_LAYER2 },
399 { "out", TOK_OUT },
400 { "diverted", TOK_DIVERTED },
401 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
402 { "diverted-output", TOK_DIVERTEDOUTPUT },
403 { "xmit", TOK_XMIT },
404 { "recv", TOK_RECV },
405 { "via", TOK_VIA },
406 { "fragment", TOK_FRAG },
407 { "frag", TOK_FRAG },
408 { "ipoptions", TOK_IPOPTS },
409 { "ipopts", TOK_IPOPTS },
410 { "iplen", TOK_IPLEN },
411 { "ipid", TOK_IPID },
412 { "ipprecedence", TOK_IPPRECEDENCE },
413 { "iptos", TOK_IPTOS },
414 { "ipttl", TOK_IPTTL },
415 { "ipversion", TOK_IPVER },
416 { "ipver", TOK_IPVER },
417 { "estab", TOK_ESTAB },
418 { "established", TOK_ESTAB },
419 { "setup", TOK_SETUP },
420 { "tcpdatalen", TOK_TCPDATALEN },
421 { "tcpflags", TOK_TCPFLAGS },
422 { "tcpflgs", TOK_TCPFLAGS },
423 { "tcpoptions", TOK_TCPOPTS },
424 { "tcpopts", TOK_TCPOPTS },
425 { "tcpseq", TOK_TCPSEQ },
426 { "tcpack", TOK_TCPACK },
427 { "tcpwin", TOK_TCPWIN },
428 { "icmptype", TOK_ICMPTYPES },
429 { "icmptypes", TOK_ICMPTYPES },
430 { "dst-ip", TOK_DSTIP },
431 { "src-ip", TOK_SRCIP },
432 { "dst-port", TOK_DSTPORT },
433 { "src-port", TOK_SRCPORT },
434 { "proto", TOK_PROTO },
435 { "MAC", TOK_MAC },
436 { "mac", TOK_MAC },
437 { "mac-type", TOK_MACTYPE },
438 { "verrevpath", TOK_VERREVPATH },
439 { "versrcreach", TOK_VERSRCREACH },
440 { "antispoof", TOK_ANTISPOOF },
441 { "ipsec", TOK_IPSEC },
442 { "icmp6type", TOK_ICMP6TYPES },
443 { "icmp6types", TOK_ICMP6TYPES },
444 { "ext6hdr", TOK_EXT6HDR},
445 { "flow-id", TOK_FLOWID},
446 { "ipv6", TOK_IPV6},
447 { "ip6", TOK_IPV6},
448 { "ipv4", TOK_IPV4},
449 { "ip4", TOK_IPV4},
450 { "dst-ipv6", TOK_DSTIP6},
451 { "dst-ip6", TOK_DSTIP6},
452 { "src-ipv6", TOK_SRCIP6},
453 { "src-ip6", TOK_SRCIP6},
454 { "//", TOK_COMMENT },
455
456 { "not", TOK_NOT }, /* pseudo option */
457 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
458 { "or", TOK_OR }, /* pseudo option */
459 { "|", /* escape */ TOK_OR }, /* pseudo option */
460 { "{", TOK_STARTBRACE }, /* pseudo option */
461 { "(", TOK_STARTBRACE }, /* pseudo option */
462 { "}", TOK_ENDBRACE }, /* pseudo option */
463 { ")", TOK_ENDBRACE }, /* pseudo option */
464 { NULL, 0 } /* terminator */
465};
466
467#define TABLEARG "tablearg"
468
469static __inline uint64_t
470align_uint64(uint64_t *pll) {
471 uint64_t ret;
472
473 bcopy (pll, &ret, sizeof(ret));
474 return ret;
475}
476
477/*
478 * conditionally runs the command.
479 */
480static int
481do_cmd(int optname, void *optval, uintptr_t optlen)
482{
483 static int s = -1; /* the socket */
484 int i;
485
486 if (test_only)
487 return 0;
488
489 if (s == -1)
490 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
491 if (s < 0)
492 err(EX_UNAVAILABLE, "socket");
493
494 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
495 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
496 optname == IP_FW_TABLE_GETSIZE)
497 i = getsockopt(s, IPPROTO_IP, optname, optval,
498 (socklen_t *)optlen);
499 else
500 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
501 return i;
502}
503
504/**
505 * match_token takes a table and a string, returns the value associated
506 * with the string (-1 in case of failure).
507 */
508static int
509match_token(struct _s_x *table, char *string)
510{
511 struct _s_x *pt;
512 uint i = strlen(string);
513
514 for (pt = table ; i && pt->s != NULL ; pt++)
515 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
516 return pt->x;
517 return -1;
518}
519
520/**
521 * match_value takes a table and a value, returns the string associated
522 * with the value (NULL in case of failure).
523 */
524static char const *
525match_value(struct _s_x *p, int value)
526{
527 for (; p->s != NULL; p++)
528 if (p->x == value)
529 return p->s;
530 return NULL;
531}
532
533/*
534 * _substrcmp takes two strings and returns 1 if they do not match,
535 * and 0 if they match exactly or the first string is a sub-string
536 * of the second. A warning is printed to stderr in the case that the
537 * first string is a sub-string of the second.
538 *
539 * This function will be removed in the future through the usual
540 * deprecation process.
541 */
542static int
543_substrcmp(const char *str1, const char* str2)
544{
545
546 if (strncmp(str1, str2, strlen(str1)) != 0)
547 return 1;
548
549 if (strlen(str1) != strlen(str2))
550 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
551 str1, str2);
552 return 0;
553}
554
555/*
556 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
557 * and 0 if they match exactly or the second string is a sub-string
558 * of the first. A warning is printed to stderr in the case that the
559 * first string does not match the third.
560 *
561 * This function exists to warn about the bizzare construction
562 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
563 * for "bytes". The problem is that in addition to accepting "by",
564 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
565 * other string beginning with "by".
566 *
567 * This function will be removed in the future through the usual
568 * deprecation process.
569 */
570static int
571_substrcmp2(const char *str1, const char* str2, const char* str3)
572{
573
574 if (strncmp(str1, str2, strlen(str2)) != 0)
575 return 1;
576
577 if (strcmp(str1, str3) != 0)
578 warnx("DEPRECATED: '%s' matched '%s'",
579 str1, str3);
580 return 0;
581}
582
583/*
584 * prints one port, symbolic or numeric
585 */
586static void
587print_port(int proto, uint16_t port)
588{
589
590 if (proto == IPPROTO_ETHERTYPE) {
591 char const *s;
592
593 if (do_resolv && (s = match_value(ether_types, port)) )
594 printf("%s", s);
595 else
596 printf("0x%04x", port);
597 } else {
598 struct servent *se = NULL;
599 if (do_resolv) {
600 struct protoent *pe = getprotobynumber(proto);
601
602 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
603 }
604 if (se)
605 printf("%s", se->s_name);
606 else
607 printf("%d", port);
608 }
609}
610
611struct _s_x _port_name[] = {
612 {"dst-port", O_IP_DSTPORT},
613 {"src-port", O_IP_SRCPORT},
614 {"ipid", O_IPID},
615 {"iplen", O_IPLEN},
616 {"ipttl", O_IPTTL},
617 {"mac-type", O_MAC_TYPE},
618 {"tcpdatalen", O_TCPDATALEN},
619 {"tagged", O_TAGGED},
620 {NULL, 0}
621};
622
623/*
624 * Print the values in a list 16-bit items of the types above.
625 * XXX todo: add support for mask.
626 */
627static void
628print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
629{
630 uint16_t *p = cmd->ports;
631 int i;
632 char const *sep;
633
634 if (cmd->o.len & F_NOT)
635 printf(" not");
636 if (opcode != 0) {
637 sep = match_value(_port_name, opcode);
638 if (sep == NULL)
639 sep = "???";
640 printf (" %s", sep);
641 }
642 sep = " ";
643 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
644 printf(sep);
645 print_port(proto, p[0]);
646 if (p[0] != p[1]) {
647 printf("-");
648 print_port(proto, p[1]);
649 }
650 sep = ",";
651 }
652}
653
654/*
655 * Like strtol, but also translates service names into port numbers
656 * for some protocols.
657 * In particular:
658 * proto == -1 disables the protocol check;
659 * proto == IPPROTO_ETHERTYPE looks up an internal table
660 * proto == <some value in /etc/protocols> matches the values there.
661 * Returns *end == s in case the parameter is not found.
662 */
663static int
664strtoport(char *s, char **end, int base, int proto)
665{
666 char *p, *buf;
667 char *s1;
668 int i;
669
670 *end = s; /* default - not found */
671 if (*s == '\0')
672 return 0; /* not found */
673
674 if (isdigit(*s))
675 return strtol(s, end, base);
676
677 /*
678 * find separator. '\\' escapes the next char.
679 */
680 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
681 if (*s1 == '\\' && s1[1] != '\0')
682 s1++;
683
684 buf = malloc(s1 - s + 1);
685 if (buf == NULL)
686 return 0;
687
688 /*
689 * copy into a buffer skipping backslashes
690 */
691 for (p = s, i = 0; p != s1 ; p++)
692 if (*p != '\\')
693 buf[i++] = *p;
694 buf[i++] = '\0';
695
696 if (proto == IPPROTO_ETHERTYPE) {
697 i = match_token(ether_types, buf);
698 free(buf);
699 if (i != -1) { /* found */
700 *end = s1;
701 return i;
702 }
703 } else {
704 struct protoent *pe = NULL;
705 struct servent *se;
706
707 if (proto != 0)
708 pe = getprotobynumber(proto);
709 setservent(1);
710 se = getservbyname(buf, pe ? pe->p_name : NULL);
711 free(buf);
712 if (se != NULL) {
713 *end = s1;
714 return ntohs(se->s_port);
715 }
716 }
717 return 0; /* not found */
718}
719
720/*
721 * Map between current altq queue id numbers and names.
722 */
723static int altq_fetched = 0;
724static TAILQ_HEAD(, pf_altq) altq_entries =
725 TAILQ_HEAD_INITIALIZER(altq_entries);
726
727static void
728altq_set_enabled(int enabled)
729{
730 int pffd;
731
732 pffd = open("/dev/pf", O_RDWR);
733 if (pffd == -1)
734 err(EX_UNAVAILABLE,
735 "altq support opening pf(4) control device");
736 if (enabled) {
737 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST)
738 err(EX_UNAVAILABLE, "enabling altq");
739 } else {
740 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT)
741 err(EX_UNAVAILABLE, "disabling altq");
742 }
743 close(pffd);
744}
745
746static void
747altq_fetch()
748{
749 struct pfioc_altq pfioc;
750 struct pf_altq *altq;
751 int pffd, mnr;
752
753 if (altq_fetched)
754 return;
755 altq_fetched = 1;
756 pffd = open("/dev/pf", O_RDONLY);
757 if (pffd == -1) {
758 warn("altq support opening pf(4) control device");
759 return;
760 }
761 bzero(&pfioc, sizeof(pfioc));
762 if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) {
763 warn("altq support getting queue list");
764 close(pffd);
765 return;
766 }
767 mnr = pfioc.nr;
768 for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) {
769 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) {
770 if (errno == EBUSY)
771 break;
772 warn("altq support getting queue list");
773 close(pffd);
774 return;
775 }
776 if (pfioc.altq.qid == 0)
777 continue;
778 altq = malloc(sizeof(*altq));
779 if (altq == NULL)
780 err(EX_OSERR, "malloc");
781 *altq = pfioc.altq;
782 TAILQ_INSERT_TAIL(&altq_entries, altq, entries);
783 }
784 close(pffd);
785}
786
787static u_int32_t
788altq_name_to_qid(const char *name)
789{
790 struct pf_altq *altq;
791
792 altq_fetch();
793 TAILQ_FOREACH(altq, &altq_entries, entries)
794 if (strcmp(name, altq->qname) == 0)
795 break;
796 if (altq == NULL)
797 errx(EX_DATAERR, "altq has no queue named `%s'", name);
798 return altq->qid;
799}
800
801static const char *
802altq_qid_to_name(u_int32_t qid)
803{
804 struct pf_altq *altq;
805
806 altq_fetch();
807 TAILQ_FOREACH(altq, &altq_entries, entries)
808 if (qid == altq->qid)
809 break;
810 if (altq == NULL)
811 return NULL;
812 return altq->qname;
813}
814
815static void
816fill_altq_qid(u_int32_t *qid, const char *av)
817{
818 *qid = altq_name_to_qid(av);
819}
820
821/*
822 * Fill the body of the command with the list of port ranges.
823 */
824static int
825fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
826{
827 uint16_t a, b, *p = cmd->ports;
828 int i = 0;
829 char *s = av;
830
831 while (*s) {
832 a = strtoport(av, &s, 0, proto);
833 if (s == av) /* empty or invalid argument */
834 return (0);
835
836 switch (*s) {
837 case '-': /* a range */
838 av = s + 1;
839 b = strtoport(av, &s, 0, proto);
840 /* Reject expressions like '1-abc' or '1-2-3'. */
841 if (s == av || (*s != ',' && *s != '\0'))
842 return (0);
843 p[0] = a;
844 p[1] = b;
845 break;
846 case ',': /* comma separated list */
847 case '\0':
848 p[0] = p[1] = a;
849 break;
850 default:
851 warnx("port list: invalid separator <%c> in <%s>",
852 *s, av);
853 return (0);
854 }
855
856 i++;
857 p += 2;
858 av = s + 1;
859 }
860 if (i > 0) {
861 if (i + 1 > F_LEN_MASK)
862 errx(EX_DATAERR, "too many ports/ranges\n");
863 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
864 }
865 return (i);
866}
867
868static struct _s_x icmpcodes[] = {
869 { "net", ICMP_UNREACH_NET },
870 { "host", ICMP_UNREACH_HOST },
871 { "protocol", ICMP_UNREACH_PROTOCOL },
872 { "port", ICMP_UNREACH_PORT },
873 { "needfrag", ICMP_UNREACH_NEEDFRAG },
874 { "srcfail", ICMP_UNREACH_SRCFAIL },
875 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
876 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
877 { "isolated", ICMP_UNREACH_ISOLATED },
878 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
879 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
880 { "tosnet", ICMP_UNREACH_TOSNET },
881 { "toshost", ICMP_UNREACH_TOSHOST },
882 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
883 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
884 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
885 { NULL, 0 }
886};
887
888static void
889fill_reject_code(u_short *codep, char *str)
890{
891 int val;
892 char *s;
893
894 val = strtoul(str, &s, 0);
895 if (s == str || *s != '\0' || val >= 0x100)
896 val = match_token(icmpcodes, str);
897 if (val < 0)
898 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
899 *codep = val;
900 return;
901}
902
903static void
904print_reject_code(uint16_t code)
905{
906 char const *s = match_value(icmpcodes, code);
907
908 if (s != NULL)
909 printf("unreach %s", s);
910 else
911 printf("unreach %u", code);
912}
913
914static struct _s_x icmp6codes[] = {
915 { "no-route", ICMP6_DST_UNREACH_NOROUTE },
916 { "admin-prohib", ICMP6_DST_UNREACH_ADMIN },
917 { "address", ICMP6_DST_UNREACH_ADDR },
918 { "port", ICMP6_DST_UNREACH_NOPORT },
919 { NULL, 0 }
920};
921
922static void
923fill_unreach6_code(u_short *codep, char *str)
924{
925 int val;
926 char *s;
927
928 val = strtoul(str, &s, 0);
929 if (s == str || *s != '\0' || val >= 0x100)
930 val = match_token(icmp6codes, str);
931 if (val < 0)
932 errx(EX_DATAERR, "unknown ICMPv6 unreachable code ``%s''", str);
933 *codep = val;
934 return;
935}
936
937static void
938print_unreach6_code(uint16_t code)
939{
940 char const *s = match_value(icmp6codes, code);
941
942 if (s != NULL)
943 printf("unreach6 %s", s);
944 else
945 printf("unreach6 %u", code);
946}
947
948/*
949 * Returns the number of bits set (from left) in a contiguous bitmask,
950 * or -1 if the mask is not contiguous.
951 * XXX this needs a proper fix.
952 * This effectively works on masks in big-endian (network) format.
953 * when compiled on little endian architectures.
954 *
955 * First bit is bit 7 of the first byte -- note, for MAC addresses,
956 * the first bit on the wire is bit 0 of the first byte.
957 * len is the max length in bits.
958 */
959static int
960contigmask(uint8_t *p, int len)
961{
962 int i, n;
963
964 for (i=0; i<len ; i++)
965 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
966 break;
967 for (n=i+1; n < len; n++)
968 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
969 return -1; /* mask not contiguous */
970 return i;
971}
972
973/*
974 * print flags set/clear in the two bitmasks passed as parameters.
975 * There is a specialized check for f_tcpflags.
976 */
977static void
978print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
979{
980 char const *comma = "";
981 int i;
982 uint8_t set = cmd->arg1 & 0xff;
983 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
984
985 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
986 printf(" setup");
987 return;
988 }
989
990 printf(" %s ", name);
991 for (i=0; list[i].x != 0; i++) {
992 if (set & list[i].x) {
993 set &= ~list[i].x;
994 printf("%s%s", comma, list[i].s);
995 comma = ",";
996 }
997 if (clear & list[i].x) {
998 clear &= ~list[i].x;
999 printf("%s!%s", comma, list[i].s);
1000 comma = ",";
1001 }
1002 }
1003}
1004
1005/*
1006 * Print the ip address contained in a command.
1007 */
1008static void
1009print_ip(ipfw_insn_ip *cmd, char const *s)
1010{
1011 struct hostent *he = NULL;
1012 int len = F_LEN((ipfw_insn *)cmd);
1013 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1014
1015 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1016
1017 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1018 printf("me");
1019 return;
1020 }
1021 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1022 cmd->o.opcode == O_IP_DST_LOOKUP) {
1023 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
1024 if (len == F_INSN_SIZE(ipfw_insn_u32))
1025 printf(",%u", *a);
1026 printf(")");
1027 return;
1028 }
1029 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1030 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1031 int i, j;
1032 char comma = '{';
1033
1034 x = cmd->o.arg1 - 1;
1035 x = htonl( ~x );
1036 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1037 printf("%s/%d", inet_ntoa(cmd->addr),
1038 contigmask((uint8_t *)&x, 32));
1039 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1040 x &= 0xff; /* base */
1041 /*
1042 * Print bits and ranges.
1043 * Locate first bit set (i), then locate first bit unset (j).
1044 * If we have 3+ consecutive bits set, then print them as a
1045 * range, otherwise only print the initial bit and rescan.
1046 */
1047 for (i=0; i < cmd->o.arg1; i++)
1048 if (map[i/32] & (1<<(i & 31))) {
1049 for (j=i+1; j < cmd->o.arg1; j++)
1050 if (!(map[ j/32] & (1<<(j & 31))))
1051 break;
1052 printf("%c%d", comma, i+x);
1053 if (j>i+2) { /* range has at least 3 elements */
1054 printf("-%d", j-1+x);
1055 i = j-1;
1056 }
1057 comma = ',';
1058 }
1059 printf("}");
1060 return;
1061 }
1062 /*
1063 * len == 2 indicates a single IP, whereas lists of 1 or more
1064 * addr/mask pairs have len = (2n+1). We convert len to n so we
1065 * use that to count the number of entries.
1066 */
1067 for (len = len / 2; len > 0; len--, a += 2) {
1068 int mb = /* mask length */
1069 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1070 32 : contigmask((uint8_t *)&(a[1]), 32);
1071 if (mb == 32 && do_resolv)
1072 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1073 if (he != NULL) /* resolved to name */
1074 printf("%s", he->h_name);
1075 else if (mb == 0) /* any */
1076 printf("any");
1077 else { /* numeric IP followed by some kind of mask */
1078 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
1079 if (mb < 0)
1080 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
1081 else if (mb < 32)
1082 printf("/%d", mb);
1083 }
1084 if (len > 1)
1085 printf(",");
1086 }
1087}
1088
1089/*
1090 * prints a MAC address/mask pair
1091 */
1092static void
1093print_mac(uint8_t *addr, uint8_t *mask)
1094{
1095 int l = contigmask(mask, 48);
1096
1097 if (l == 0)
1098 printf(" any");
1099 else {
1100 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
1101 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1102 if (l == -1)
1103 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
1104 mask[0], mask[1], mask[2],
1105 mask[3], mask[4], mask[5]);
1106 else if (l < 48)
1107 printf("/%d", l);
1108 }
1109}
1110
1111static void
1112fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1113{
1114 uint8_t type;
1115
1116 cmd->d[0] = 0;
1117 while (*av) {
1118 if (*av == ',')
1119 av++;
1120
1121 type = strtoul(av, &av, 0);
1122
1123 if (*av != ',' && *av != '\0')
1124 errx(EX_DATAERR, "invalid ICMP type");
1125
1126 if (type > 31)
1127 errx(EX_DATAERR, "ICMP type out of range");
1128
1129 cmd->d[0] |= 1 << type;
1130 }
1131 cmd->o.opcode = O_ICMPTYPE;
1132 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1133}
1134
1135static void
1136print_icmptypes(ipfw_insn_u32 *cmd)
1137{
1138 int i;
1139 char sep= ' ';
1140
1141 printf(" icmptypes");
1142 for (i = 0; i < 32; i++) {
1143 if ( (cmd->d[0] & (1 << (i))) == 0)
1144 continue;
1145 printf("%c%d", sep, i);
1146 sep = ',';
1147 }
1148}
1149
1150/*
1151 * Print the ip address contained in a command.
1152 */
1153static void
1154print_ip6(ipfw_insn_ip6 *cmd, char const *s)
1155{
1156 struct hostent *he = NULL;
1157 int len = F_LEN((ipfw_insn *) cmd) - 1;
1158 struct in6_addr *a = &(cmd->addr6);
1159 char trad[255];
1160
1161 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
1162
1163 if (cmd->o.opcode == O_IP6_SRC_ME || cmd->o.opcode == O_IP6_DST_ME) {
1164 printf("me6");
1165 return;
1166 }
1167 if (cmd->o.opcode == O_IP6) {
1168 printf(" ip6");
1169 return;
1170 }
1171
1172 /*
1173 * len == 4 indicates a single IP, whereas lists of 1 or more
1174 * addr/mask pairs have len = (2n+1). We convert len to n so we
1175 * use that to count the number of entries.
1176 */
1177
1178 for (len = len / 4; len > 0; len -= 2, a += 2) {
1179 int mb = /* mask length */
1180 (cmd->o.opcode == O_IP6_SRC || cmd->o.opcode == O_IP6_DST) ?
1181 128 : contigmask((uint8_t *)&(a[1]), 128);
1182
1183 if (mb == 128 && do_resolv)
1184 he = gethostbyaddr((char *)a, sizeof(*a), AF_INET6);
1185 if (he != NULL) /* resolved to name */
1186 printf("%s", he->h_name);
1187 else if (mb == 0) /* any */
1188 printf("any");
1189 else { /* numeric IP followed by some kind of mask */
1190 if (inet_ntop(AF_INET6, a, trad, sizeof( trad ) ) == NULL)
1191 printf("Error ntop in print_ip6\n");
1192 printf("%s", trad );
1193 if (mb < 0) /* XXX not really legal... */
1194 printf(":%s",
1195 inet_ntop(AF_INET6, &a[1], trad, sizeof(trad)));
1196 else if (mb < 128)
1197 printf("/%d", mb);
1198 }
1199 if (len > 2)
1200 printf(",");
1201 }
1202}
1203
1204static void
1205fill_icmp6types(ipfw_insn_icmp6 *cmd, char *av)
1206{
1207 uint8_t type;
1208
1209 bzero(cmd, sizeof(*cmd));
1210 while (*av) {
1211 if (*av == ',')
1212 av++;
1213 type = strtoul(av, &av, 0);
1214 if (*av != ',' && *av != '\0')
1215 errx(EX_DATAERR, "invalid ICMP6 type");
1216 /*
1217 * XXX: shouldn't this be 0xFF? I can't see any reason why
1218 * we shouldn't be able to filter all possiable values
1219 * regardless of the ability of the rest of the kernel to do
1220 * anything useful with them.
1221 */
1222 if (type > ICMP6_MAXTYPE)
1223 errx(EX_DATAERR, "ICMP6 type out of range");
1224 cmd->d[type / 32] |= ( 1 << (type % 32));
1225 }
1226 cmd->o.opcode = O_ICMP6TYPE;
1227 cmd->o.len |= F_INSN_SIZE(ipfw_insn_icmp6);
1228}
1229
1230
1231static void
1232print_icmp6types(ipfw_insn_u32 *cmd)
1233{
1234 int i, j;
1235 char sep= ' ';
1236
1237 printf(" ip6 icmp6types");
1238 for (i = 0; i < 7; i++)
1239 for (j=0; j < 32; ++j) {
1240 if ( (cmd->d[i] & (1 << (j))) == 0)
1241 continue;
1242 printf("%c%d", sep, (i*32 + j));
1243 sep = ',';
1244 }
1245}
1246
1247static void
1248print_flow6id( ipfw_insn_u32 *cmd)
1249{
1250 uint16_t i, limit = cmd->o.arg1;
1251 char sep = ',';
1252
1253 printf(" flow-id ");
1254 for( i=0; i < limit; ++i) {
1255 if (i == limit - 1)
1256 sep = ' ';
1257 printf("%d%c", cmd->d[i], sep);
1258 }
1259}
1260
1261/* structure and define for the extension header in ipv6 */
1262static struct _s_x ext6hdrcodes[] = {
1263 { "frag", EXT_FRAGMENT },
1264 { "hopopt", EXT_HOPOPTS },
1265 { "route", EXT_ROUTING },
1266 { "dstopt", EXT_DSTOPTS },
1267 { "ah", EXT_AH },
1268 { "esp", EXT_ESP },
1269 { NULL, 0 }
1270};
1271
1272/* fills command for the extension header filtering */
1273int
1274fill_ext6hdr( ipfw_insn *cmd, char *av)
1275{
1276 int tok;
1277 char *s = av;
1278
1279 cmd->arg1 = 0;
1280
1281 while(s) {
1282 av = strsep( &s, ",") ;
1283 tok = match_token(ext6hdrcodes, av);
1284 switch (tok) {
1285 case EXT_FRAGMENT:
1286 cmd->arg1 |= EXT_FRAGMENT;
1287 break;
1288
1289 case EXT_HOPOPTS:
1290 cmd->arg1 |= EXT_HOPOPTS;
1291 break;
1292
1293 case EXT_ROUTING:
1294 cmd->arg1 |= EXT_ROUTING;
1295 break;
1296
1297 case EXT_DSTOPTS:
1298 cmd->arg1 |= EXT_DSTOPTS;
1299 break;
1300
1301 case EXT_AH:
1302 cmd->arg1 |= EXT_AH;
1303 break;
1304
1305 case EXT_ESP:
1306 cmd->arg1 |= EXT_ESP;
1307 break;
1308
1309 default:
1310 errx( EX_DATAERR, "invalid option for ipv6 exten header" );
1311 break;
1312 }
1313 }
1314 if (cmd->arg1 == 0 )
1315 return 0;
1316 cmd->opcode = O_EXT_HDR;
1317 cmd->len |= F_INSN_SIZE( ipfw_insn );
1318 return 1;
1319}
1320
1321void
1322print_ext6hdr( ipfw_insn *cmd )
1323{
1324 char sep = ' ';
1325
1326 printf(" extension header:");
1327 if (cmd->arg1 & EXT_FRAGMENT ) {
1328 printf("%cfragmentation", sep);
1329 sep = ',';
1330 }
1331 if (cmd->arg1 & EXT_HOPOPTS ) {
1332 printf("%chop options", sep);
1333 sep = ',';
1334 }
1335 if (cmd->arg1 & EXT_ROUTING ) {
1336 printf("%crouting options", sep);
1337 sep = ',';
1338 }
1339 if (cmd->arg1 & EXT_DSTOPTS ) {
1340 printf("%cdestination options", sep);
1341 sep = ',';
1342 }
1343 if (cmd->arg1 & EXT_AH ) {
1344 printf("%cauthentication header", sep);
1345 sep = ',';
1346 }
1347 if (cmd->arg1 & EXT_ESP ) {
1348 printf("%cencapsulated security payload", sep);
1349 }
1350}
1351
1352/*
1353 * show_ipfw() prints the body of an ipfw rule.
1354 * Because the standard rule has at least proto src_ip dst_ip, we use
1355 * a helper function to produce these entries if not provided explicitly.
1356 * The first argument is the list of fields we have, the second is
1357 * the list of fields we want to be printed.
1358 *
1359 * Special cases if we have provided a MAC header:
1360 * + if the rule does not contain IP addresses/ports, do not print them;
1361 * + if the rule does not contain an IP proto, print "all" instead of "ip";
1362 *
1363 * Once we have 'have_options', IP header fields are printed as options.
1364 */
1365#define HAVE_PROTO 0x0001
1366#define HAVE_SRCIP 0x0002
1367#define HAVE_DSTIP 0x0004
1368#define HAVE_MAC 0x0008
1369#define HAVE_MACTYPE 0x0010
1370#define HAVE_PROTO4 0x0040
1371#define HAVE_PROTO6 0x0080
1372#define HAVE_OPTIONS 0x8000
1373
1374#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
1375static void
1376show_prerequisites(int *flags, int want, int cmd)
1377{
1378 if (comment_only)
1379 return;
1380 if ( (*flags & HAVE_IP) == HAVE_IP)
1381 *flags |= HAVE_OPTIONS;
1382
1383 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
1384 cmd != O_MAC_TYPE) {
1385 /*
1386 * mac-type was optimized out by the compiler,
1387 * restore it
1388 */
1389 printf(" any");
1390 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
1391 return;
1392 }
1393 if ( !(*flags & HAVE_OPTIONS)) {
1394 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
1395 if ( (*flags & HAVE_PROTO4))
1396 printf(" ip4");
1397 else if ( (*flags & HAVE_PROTO6))
1398 printf(" ip6");
1399 else
1400 printf(" ip");
1401
1402 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1403 printf(" from any");
1404 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1405 printf(" to any");
1406 }
1407 *flags |= want;
1408}
1409
1410static void
1411show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1412{
1413 static int twidth = 0;
1414 int l;
1415 ipfw_insn *cmd, *tagptr = NULL;
1416 char *comment = NULL; /* ptr to comment if we have one */
1417 int proto = 0; /* default */
1418 int flags = 0; /* prerequisites */
1419 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1420 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1421 int or_block = 0; /* we are in an or block */
1422 uint32_t set_disable;
1423
1424 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1425
1426 if (set_disable & (1 << rule->set)) { /* disabled */
1427 if (!show_sets)
1428 return;
1429 else
1430 printf("# DISABLED ");
1431 }
1432 printf("%05u ", rule->rulenum);
1433
1434 if (pcwidth>0 || bcwidth>0)
1435 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
1436 bcwidth, align_uint64(&rule->bcnt));
1437
1438 if (do_time == 2)
1439 printf("%10u ", rule->timestamp);
1440 else if (do_time == 1) {
1441 char timestr[30];
1442 time_t t = (time_t)0;
1443
1444 if (twidth == 0) {
1445 strcpy(timestr, ctime(&t));
1446 *strchr(timestr, '\n') = '\0';
1447 twidth = strlen(timestr);
1448 }
1449 if (rule->timestamp) {
1450 t = _long_to_time(rule->timestamp);
1451
1452 strcpy(timestr, ctime(&t));
1453 *strchr(timestr, '\n') = '\0';
1454 printf("%s ", timestr);
1455 } else {
1456 printf("%*s", twidth, " ");
1457 }
1458 }
1459
1460 if (show_sets)
1461 printf("set %d ", rule->set);
1462
1463 /*
1464 * print the optional "match probability"
1465 */
1466 if (rule->cmd_len > 0) {
1467 cmd = rule->cmd ;
1468 if (cmd->opcode == O_PROB) {
1469 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1470 double d = 1.0 * p->d[0];
1471
1472 d = (d / 0x7fffffff);
1473 printf("prob %f ", d);
1474 }
1475 }
1476
1477 /*
1478 * first print actions
1479 */
1480 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1481 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1482 switch(cmd->opcode) {
1483 case O_CHECK_STATE:
1484 printf("check-state");
1485 flags = HAVE_IP; /* avoid printing anything else */
1486 break;
1487
1488 case O_ACCEPT:
1489 printf("allow");
1490 break;
1491
1492 case O_COUNT:
1493 printf("count");
1494 break;
1495
1496 case O_DENY:
1497 printf("deny");
1498 break;
1499
1500 case O_REJECT:
1501 if (cmd->arg1 == ICMP_REJECT_RST)
1502 printf("reset");
1503 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1504 printf("reject");
1505 else
1506 print_reject_code(cmd->arg1);
1507 break;
1508
1509 case O_UNREACH6:
1510 if (cmd->arg1 == ICMP6_UNREACH_RST)
1511 printf("reset6");
1512 else
1513 print_unreach6_code(cmd->arg1);
1514 break;
1515
1516 case O_SKIPTO:
1517 PRINT_UINT_ARG("skipto ", cmd->arg1);
1518 break;
1519
1520 case O_PIPE:
1521 PRINT_UINT_ARG("pipe ", cmd->arg1);
1522 break;
1523
1524 case O_QUEUE:
1525 PRINT_UINT_ARG("queue ", cmd->arg1);
1526 break;
1527
1528 case O_DIVERT:
1529 PRINT_UINT_ARG("divert ", cmd->arg1);
1530 break;
1531
1532 case O_TEE:
1533 PRINT_UINT_ARG("tee ", cmd->arg1);
1534 break;
1535
1536 case O_NETGRAPH:
1537 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1538 break;
1539
1540 case O_NGTEE:
1541 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1542 break;
1543
1544 case O_FORWARD_IP:
1545 {
1546 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1547
1548 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1549 printf("fwd tablearg");
1550 } else {
1551 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1552 }
1553 if (s->sa.sin_port)
1554 printf(",%d", s->sa.sin_port);
1555 }
1556 break;
1557
1558 case O_LOG: /* O_LOG is printed last */
1559 logptr = (ipfw_insn_log *)cmd;
1560 break;
1561
1562 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1563 altqptr = (ipfw_insn_altq *)cmd;
1564 break;
1565
1566 case O_TAG:
1567 tagptr = cmd;
1568 break;
1569
1570 default:
1571 printf("** unrecognized action %d len %d ",
1572 cmd->opcode, cmd->len);
1573 }
1574 }
1575 if (logptr) {
1576 if (logptr->max_log > 0)
1577 printf(" log logamount %d", logptr->max_log);
1578 else
1579 printf(" log");
1580 }
1581 if (altqptr) {
1582 const char *qname;
1583
1584 qname = altq_qid_to_name(altqptr->qid);
1585 if (qname == NULL)
1586 printf(" altq ?<%u>", altqptr->qid);
1587 else
1588 printf(" altq %s", qname);
1589 }
1590 if (tagptr) {
1591 if (tagptr->len & F_NOT)
1592 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1593 else
1594 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1595 }
1596
1597 /*
1598 * then print the body.
1599 */
1600 for (l = rule->act_ofs, cmd = rule->cmd ;
1601 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1602 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1603 continue;
1604 if (cmd->opcode == O_IP4) {
1605 flags |= HAVE_PROTO4;
1606 break;
1607 } else if (cmd->opcode == O_IP6) {
1608 flags |= HAVE_PROTO6;
1609 break;
1610 }
1611 }
1612 if (rule->_pad & 1) { /* empty rules before options */
1613 if (!do_compact) {
1614 show_prerequisites(&flags, HAVE_PROTO, 0);
1615 printf(" from any to any");
1616 }
1617 flags |= HAVE_IP | HAVE_OPTIONS;
1618 }
1619
1620 if (comment_only)
1621 comment = "...";
1622
1623 for (l = rule->act_ofs, cmd = rule->cmd ;
1624 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1625 /* useful alias */
1626 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1627
1628 if (comment_only) {
1629 if (cmd->opcode != O_NOP)
1630 continue;
1631 printf(" // %s\n", (char *)(cmd + 1));
1632 return;
1633 }
1634
1635 show_prerequisites(&flags, 0, cmd->opcode);
1636
1637 switch(cmd->opcode) {
1638 case O_PROB:
1639 break; /* done already */
1640
1641 case O_PROBE_STATE:
1642 break; /* no need to print anything here */
1643
1644 case O_MACADDR2: {
1645 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1646
1647 if ((cmd->len & F_OR) && !or_block)
1648 printf(" {");
1649 if (cmd->len & F_NOT)
1650 printf(" not");
1651 printf(" MAC");
1652 flags |= HAVE_MAC;
1653 print_mac(m->addr, m->mask);
1654 print_mac(m->addr + 6, m->mask + 6);
1655 }
1656 break;
1657
1658 case O_MAC_TYPE:
1659 if ((cmd->len & F_OR) && !or_block)
1660 printf(" {");
1661 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
1662 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1663 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
1664 break;
1665
1666 case O_IP_SRC:
1667 case O_IP_SRC_LOOKUP:
1668 case O_IP_SRC_MASK:
1669 case O_IP_SRC_ME:
1670 case O_IP_SRC_SET:
1671 show_prerequisites(&flags, HAVE_PROTO, 0);
1672 if (!(flags & HAVE_SRCIP))
1673 printf(" from");
1674 if ((cmd->len & F_OR) && !or_block)
1675 printf(" {");
1676 print_ip((ipfw_insn_ip *)cmd,
1677 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1678 flags |= HAVE_SRCIP;
1679 break;
1680
1681 case O_IP_DST:
1682 case O_IP_DST_LOOKUP:
1683 case O_IP_DST_MASK:
1684 case O_IP_DST_ME:
1685 case O_IP_DST_SET:
1686 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1687 if (!(flags & HAVE_DSTIP))
1688 printf(" to");
1689 if ((cmd->len & F_OR) && !or_block)
1690 printf(" {");
1691 print_ip((ipfw_insn_ip *)cmd,
1692 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1693 flags |= HAVE_DSTIP;
1694 break;
1695
1696 case O_IP6_SRC:
1697 case O_IP6_SRC_MASK:
1698 case O_IP6_SRC_ME:
1699 show_prerequisites(&flags, HAVE_PROTO, 0);
1700 if (!(flags & HAVE_SRCIP))
1701 printf(" from");
1702 if ((cmd->len & F_OR) && !or_block)
1703 printf(" {");
1704 print_ip6((ipfw_insn_ip6 *)cmd,
1705 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1706 flags |= HAVE_SRCIP | HAVE_PROTO;
1707 break;
1708
1709 case O_IP6_DST:
1710 case O_IP6_DST_MASK:
1711 case O_IP6_DST_ME:
1712 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1713 if (!(flags & HAVE_DSTIP))
1714 printf(" to");
1715 if ((cmd->len & F_OR) && !or_block)
1716 printf(" {");
1717 print_ip6((ipfw_insn_ip6 *)cmd,
1718 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1719 flags |= HAVE_DSTIP;
1720 break;
1721
1722 case O_FLOW6ID:
1723 print_flow6id( (ipfw_insn_u32 *) cmd );
1724 flags |= HAVE_OPTIONS;
1725 break;
1726
1727 case O_IP_DSTPORT:
1728 show_prerequisites(&flags, HAVE_IP, 0);
1729 case O_IP_SRCPORT:
1730 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1731 if ((cmd->len & F_OR) && !or_block)
1732 printf(" {");
1733 print_newports((ipfw_insn_u16 *)cmd, proto,
1734 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1735 break;
1736
1737 case O_PROTO: {
1738 struct protoent *pe = NULL;
1739
1740 if ((cmd->len & F_OR) && !or_block)
1741 printf(" {");
1742 if (cmd->len & F_NOT)
1743 printf(" not");
1744 proto = cmd->arg1;
1745 pe = getprotobynumber(cmd->arg1);
1746 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1747 !(flags & HAVE_PROTO))
1748 show_prerequisites(&flags,
1749 HAVE_IP | HAVE_OPTIONS, 0);
1750 if (flags & HAVE_OPTIONS)
1751 printf(" proto");
1752 if (pe)
1753 printf(" %s", pe->p_name);
1754 else
1755 printf(" %u", cmd->arg1);
1756 }
1757 flags |= HAVE_PROTO;
1758 break;
1759
1760 default: /*options ... */
1761 if (!(cmd->len & (F_OR|F_NOT)))
1762 if (((cmd->opcode == O_IP6) &&
1763 (flags & HAVE_PROTO6)) ||
1764 ((cmd->opcode == O_IP4) &&
1765 (flags & HAVE_PROTO4)))
1766 break;
1767 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1768 if ((cmd->len & F_OR) && !or_block)
1769 printf(" {");
1770 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1771 printf(" not");
1772 switch(cmd->opcode) {
1773 case O_FRAG:
1774 printf(" frag");
1775 break;
1776
1777 case O_IN:
1778 printf(cmd->len & F_NOT ? " out" : " in");
1779 break;
1780
1781 case O_DIVERTED:
1782 switch (cmd->arg1) {
1783 case 3:
1784 printf(" diverted");
1785 break;
1786 case 1:
1787 printf(" diverted-loopback");
1788 break;
1789 case 2:
1790 printf(" diverted-output");
1791 break;
1792 default:
1793 printf(" diverted-?<%u>", cmd->arg1);
1794 break;
1795 }
1796 break;
1797
1798 case O_LAYER2:
1799 printf(" layer2");
1800 break;
1801 case O_XMIT:
1802 case O_RECV:
1803 case O_VIA:
1804 {
1805 char const *s;
1806 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1807
1808 if (cmd->opcode == O_XMIT)
1809 s = "xmit";
1810 else if (cmd->opcode == O_RECV)
1811 s = "recv";
1812 else /* if (cmd->opcode == O_VIA) */
1813 s = "via";
1814 if (cmdif->name[0] == '\0')
1815 printf(" %s %s", s,
1816 inet_ntoa(cmdif->p.ip));
1817 else
1818 printf(" %s %s", s, cmdif->name);
1819
1820 break;
1821 }
1822 case O_IPID:
1823 if (F_LEN(cmd) == 1)
1824 printf(" ipid %u", cmd->arg1 );
1825 else
1826 print_newports((ipfw_insn_u16 *)cmd, 0,
1827 O_IPID);
1828 break;
1829
1830 case O_IPTTL:
1831 if (F_LEN(cmd) == 1)
1832 printf(" ipttl %u", cmd->arg1 );
1833 else
1834 print_newports((ipfw_insn_u16 *)cmd, 0,
1835 O_IPTTL);
1836 break;
1837
1838 case O_IPVER:
1839 printf(" ipver %u", cmd->arg1 );
1840 break;
1841
1842 case O_IPPRECEDENCE:
1843 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1844 break;
1845
1846 case O_IPLEN:
1847 if (F_LEN(cmd) == 1)
1848 printf(" iplen %u", cmd->arg1 );
1849 else
1850 print_newports((ipfw_insn_u16 *)cmd, 0,
1851 O_IPLEN);
1852 break;
1853
1854 case O_IPOPT:
1855 print_flags("ipoptions", cmd, f_ipopts);
1856 break;
1857
1858 case O_IPTOS:
1859 print_flags("iptos", cmd, f_iptos);
1860 break;
1861
1862 case O_ICMPTYPE:
1863 print_icmptypes((ipfw_insn_u32 *)cmd);
1864 break;
1865
1866 case O_ESTAB:
1867 printf(" established");
1868 break;
1869
1870 case O_TCPDATALEN:
1871 if (F_LEN(cmd) == 1)
1872 printf(" tcpdatalen %u", cmd->arg1 );
1873 else
1874 print_newports((ipfw_insn_u16 *)cmd, 0,
1875 O_TCPDATALEN);
1876 break;
1877
1878 case O_TCPFLAGS:
1879 print_flags("tcpflags", cmd, f_tcpflags);
1880 break;
1881
1882 case O_TCPOPTS:
1883 print_flags("tcpoptions", cmd, f_tcpopts);
1884 break;
1885
1886 case O_TCPWIN:
1887 printf(" tcpwin %d", ntohs(cmd->arg1));
1888 break;
1889
1890 case O_TCPACK:
1891 printf(" tcpack %d", ntohl(cmd32->d[0]));
1892 break;
1893
1894 case O_TCPSEQ:
1895 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1896 break;
1897
1898 case O_UID:
1899 {
1900 struct passwd *pwd = getpwuid(cmd32->d[0]);
1901
1902 if (pwd)
1903 printf(" uid %s", pwd->pw_name);
1904 else
1905 printf(" uid %u", cmd32->d[0]);
1906 }
1907 break;
1908
1909 case O_GID:
1910 {
1911 struct group *grp = getgrgid(cmd32->d[0]);
1912
1913 if (grp)
1914 printf(" gid %s", grp->gr_name);
1915 else
1916 printf(" gid %u", cmd32->d[0]);
1917 }
1918 break;
1919
1920 case O_JAIL:
1921 printf(" jail %d", cmd32->d[0]);
1922 break;
1923
1924 case O_VERREVPATH:
1925 printf(" verrevpath");
1926 break;
1927
1928 case O_VERSRCREACH:
1929 printf(" versrcreach");
1930 break;
1931
1932 case O_ANTISPOOF:
1933 printf(" antispoof");
1934 break;
1935
1936 case O_IPSEC:
1937 printf(" ipsec");
1938 break;
1939
1940 case O_NOP:
1941 comment = (char *)(cmd + 1);
1942 break;
1943
1944 case O_KEEP_STATE:
1945 printf(" keep-state");
1946 break;
1947
1948 case O_LIMIT: {
1949 struct _s_x *p = limit_masks;
1950 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1951 uint8_t x = c->limit_mask;
1952 char const *comma = " ";
1953
1954 printf(" limit");
1955 for (; p->x != 0 ; p++)
1956 if ((x & p->x) == p->x) {
1957 x &= ~p->x;
1958 printf("%s%s", comma, p->s);
1959 comma = ",";
1960 }
1961 PRINT_UINT_ARG(" ", c->conn_limit);
1962 break;
1963 }
1964
1965 case O_IP6:
1966 printf(" ip6");
1967 break;
1968
1969 case O_IP4:
1970 printf(" ip4");
1971 break;
1972
1973 case O_ICMP6TYPE:
1974 print_icmp6types((ipfw_insn_u32 *)cmd);
1975 break;
1976
1977 case O_EXT_HDR:
1978 print_ext6hdr( (ipfw_insn *) cmd );
1979 break;
1980
1981 case O_TAGGED:
1982 if (F_LEN(cmd) == 1)
1983 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1984 else
1985 print_newports((ipfw_insn_u16 *)cmd, 0,
1986 O_TAGGED);
1987 break;
1988
1989 default:
1990 printf(" [opcode %d len %d]",
1991 cmd->opcode, cmd->len);
1992 }
1993 }
1994 if (cmd->len & F_OR) {
1995 printf(" or");
1996 or_block = 1;
1997 } else if (or_block) {
1998 printf(" }");
1999 or_block = 0;
2000 }
2001 }
2002 show_prerequisites(&flags, HAVE_IP, 0);
2003 if (comment)
2004 printf(" // %s", comment);
2005 printf("\n");
2006}
2007
2008static void
2009show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
2010{
2011 struct protoent *pe;
2012 struct in_addr a;
2013 uint16_t rulenum;
2014 char buf[INET6_ADDRSTRLEN];
2015
2016 if (!do_expired) {
2017 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2018 return;
2019 }
2020 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2021 printf("%05d", rulenum);
2022 if (pcwidth>0 || bcwidth>0)
2023 printf(" %*llu %*llu (%ds)", pcwidth,
2024 align_uint64(&d->pcnt), bcwidth,
2025 align_uint64(&d->bcnt), d->expire);
2026 switch (d->dyn_type) {
2027 case O_LIMIT_PARENT:
2028 printf(" PARENT %d", d->count);
2029 break;
2030 case O_LIMIT:
2031 printf(" LIMIT");
2032 break;
2033 case O_KEEP_STATE: /* bidir, no mask */
2034 printf(" STATE");
2035 break;
2036 }
2037
2038 if ((pe = getprotobynumber(d->id.proto)) != NULL)
2039 printf(" %s", pe->p_name);
2040 else
2041 printf(" proto %u", d->id.proto);
2042
2043 if (d->id.addr_type == 4) {
2044 a.s_addr = htonl(d->id.src_ip);
2045 printf(" %s %d", inet_ntoa(a), d->id.src_port);
2046
2047 a.s_addr = htonl(d->id.dst_ip);
2048 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
2049 } else if (d->id.addr_type == 6) {
2050 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2051 sizeof(buf)), d->id.src_port);
2052 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
2053 sizeof(buf)), d->id.dst_port);
2054 } else
2055 printf(" UNKNOWN <-> UNKNOWN\n");
2056
2057 printf("\n");
2058}
2059
2060static int
2061sort_q(const void *pa, const void *pb)
2062{
2063 int rev = (do_sort < 0);
2064 int field = rev ? -do_sort : do_sort;
2065 long long res = 0;
2066 const struct dn_flow_queue *a = pa;
2067 const struct dn_flow_queue *b = pb;
2068
2069 switch (field) {
2070 case 1: /* pkts */
2071 res = a->len - b->len;
2072 break;
2073 case 2: /* bytes */
2074 res = a->len_bytes - b->len_bytes;
2075 break;
2076
2077 case 3: /* tot pkts */
2078 res = a->tot_pkts - b->tot_pkts;
2079 break;
2080
2081 case 4: /* tot bytes */
2082 res = a->tot_bytes - b->tot_bytes;
2083 break;
2084 }
2085 if (res < 0)
2086 res = -1;
2087 if (res > 0)
2088 res = 1;
2089 return (int)(rev ? res : -res);
2090}
2091
2092static void
2093list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
2094{
2095 int l;
2096 int index_printed, indexes = 0;
2097 char buff[255];
2098 struct protoent *pe;
2099
2100 if (fs->rq_elements == 0)
2101 return;
2102
2103 if (do_sort != 0)
2104 heapsort(q, fs->rq_elements, sizeof *q, sort_q);
2105
2106 /* Print IPv4 flows */
2107 index_printed = 0;
2108 for (l = 0; l < fs->rq_elements; l++) {
2109 struct in_addr ina;
2110
2111 /* XXX: Should check for IPv4 flows */
2112 if (IS_IP6_FLOW_ID(&(q[l].id)))
2113 continue;
2114
2115 if (!index_printed) {
2116 index_printed = 1;
2117 if (indexes > 0) /* currently a no-op */
2118 printf("\n");
2119 indexes++;
2120 printf(" "
2121 "mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
2122 fs->flow_mask.proto,
2123 fs->flow_mask.src_ip, fs->flow_mask.src_port,
2124 fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
2125
2126 printf("BKT Prot ___Source IP/port____ "
2127 "____Dest. IP/port____ "
2128 "Tot_pkt/bytes Pkt/Byte Drp\n");
2129 }
2130
2131 printf("%3d ", q[l].hash_slot);
2132 pe = getprotobynumber(q[l].id.proto);
2133 if (pe)
2134 printf("%-4s ", pe->p_name);
2135 else
2136 printf("%4u ", q[l].id.proto);
2137 ina.s_addr = htonl(q[l].id.src_ip);
2138 printf("%15s/%-5d ",
2139 inet_ntoa(ina), q[l].id.src_port);
2140 ina.s_addr = htonl(q[l].id.dst_ip);
2141 printf("%15s/%-5d ",
2142 inet_ntoa(ina), q[l].id.dst_port);
2143 printf("%4qu %8qu %2u %4u %3u\n",
2144 q[l].tot_pkts, q[l].tot_bytes,
2145 q[l].len, q[l].len_bytes, q[l].drops);
2146 if (verbose)
2147 printf(" S %20qd F %20qd\n",
2148 q[l].S, q[l].F);
2149 }
2150
2151 /* Print IPv6 flows */
2152 index_printed = 0;
2153 for (l = 0; l < fs->rq_elements; l++) {
2154 if (!IS_IP6_FLOW_ID(&(q[l].id)))
2155 continue;
2156
2157 if (!index_printed) {
2158 index_printed = 1;
2159 if (indexes > 0)
2160 printf("\n");
2161 indexes++;
2162 printf("\n mask: proto: 0x%02x, flow_id: 0x%08x, ",
2163 fs->flow_mask.proto, fs->flow_mask.flow_id6);
2164 inet_ntop(AF_INET6, &(fs->flow_mask.src_ip6),
2165 buff, sizeof(buff));
2166 printf("%s/0x%04x -> ", buff, fs->flow_mask.src_port);
2167 inet_ntop( AF_INET6, &(fs->flow_mask.dst_ip6),
2168 buff, sizeof(buff) );
2169 printf("%s/0x%04x\n", buff, fs->flow_mask.dst_port);
2170
2171 printf("BKT ___Prot___ _flow-id_ "
2172 "______________Source IPv6/port_______________ "
2173 "_______________Dest. IPv6/port_______________ "
2174 "Tot_pkt/bytes Pkt/Byte Drp\n");
2175 }
2176 printf("%3d ", q[l].hash_slot);
2177 pe = getprotobynumber(q[l].id.proto);
2178 if (pe != NULL)
2179 printf("%9s ", pe->p_name);
2180 else
2181 printf("%9u ", q[l].id.proto);
2182 printf("%7d %39s/%-5d ", q[l].id.flow_id6,
2183 inet_ntop(AF_INET6, &(q[l].id.src_ip6), buff, sizeof(buff)),
2184 q[l].id.src_port);
2185 printf(" %39s/%-5d ",
2186 inet_ntop(AF_INET6, &(q[l].id.dst_ip6), buff, sizeof(buff)),
2187 q[l].id.dst_port);
2188 printf(" %4qu %8qu %2u %4u %3u\n",
2189 q[l].tot_pkts, q[l].tot_bytes,
2190 q[l].len, q[l].len_bytes, q[l].drops);
2191 if (verbose)
2192 printf(" S %20qd F %20qd\n", q[l].S, q[l].F);
2193 }
2194}
2195
2196static void
2197print_flowset_parms(struct dn_flow_set *fs, char *prefix)
2198{
2199 int l;
2200 char qs[30];
2201 char plr[30];
2202 char red[90]; /* Display RED parameters */
2203
2204 l = fs->qsize;
2205 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
2206 if (l >= 8192)
2207 sprintf(qs, "%d KB", l / 1024);
2208 else
2209 sprintf(qs, "%d B", l);
2210 } else
2211 sprintf(qs, "%3d sl.", l);
2212 if (fs->plr)
2213 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
2214 else
2215 plr[0] = '\0';
2216 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
2217 sprintf(red,
2218 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
2219 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
2220 1.0 * fs->w_q / (double)(1 << SCALE_RED),
2221 SCALE_VAL(fs->min_th),
2222 SCALE_VAL(fs->max_th),
2223 1.0 * fs->max_p / (double)(1 << SCALE_RED));
2224 else
2225 sprintf(red, "droptail");
2226
2227 printf("%s %s%s %d queues (%d buckets) %s\n",
2228 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
2229}
2230
2231static void
2232list_pipes(void *data, uint nbytes, int ac, char *av[])
2233{
2234 int rulenum;
2235 void *next = data;
2236 struct dn_pipe *p = (struct dn_pipe *) data;
2237 struct dn_flow_set *fs;
2238 struct dn_flow_queue *q;
2239 int l;
2240
2241 if (ac > 0)
2242 rulenum = strtoul(*av++, NULL, 10);
2243 else
2244 rulenum = 0;
2245 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
2246 double b = p->bandwidth;
2247 char buf[30];
2248 char prefix[80];
2249
2250 if (SLIST_NEXT(p, next) != (struct dn_pipe *)DN_IS_PIPE)
2251 break; /* done with pipes, now queues */
2252
2253 /*
2254 * compute length, as pipe have variable size
2255 */
2256 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
2257 next = (char *)p + l;
2258 nbytes -= l;
2259
2260 if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2)
2261 continue;
2262
2263 /*
2264 * Print rate (or clocking interface)
2265 */
2266 if (p->if_name[0] != '\0')
2267 sprintf(buf, "%s", p->if_name);
2268 else if (b == 0)
2269 sprintf(buf, "unlimited");
2270 else if (b >= 1000000)
2271 sprintf(buf, "%7.3f Mbit/s", b/1000000);
2272 else if (b >= 1000)
2273 sprintf(buf, "%7.3f Kbit/s", b/1000);
2274 else
2275 sprintf(buf, "%7.3f bit/s ", b);
2276
2277 sprintf(prefix, "%05d: %s %4d ms ",
2278 p->pipe_nr, buf, p->delay);
2279 print_flowset_parms(&(p->fs), prefix);
2280 if (verbose)
2281 printf(" V %20qd\n", p->V >> MY_M);
2282
2283 q = (struct dn_flow_queue *)(p+1);
2284 list_queues(&(p->fs), q);
2285 }
2286 for (fs = next; nbytes >= sizeof *fs; fs = next) {
2287 char prefix[80];
2288
2289 if (SLIST_NEXT(fs, next) != (struct dn_flow_set *)DN_IS_QUEUE)
2290 break;
2291 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
2292 next = (char *)fs + l;
2293 nbytes -= l;
2294
2295 if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) ||
2296 (rulenum != fs->parent_nr && do_pipe == 1))) {
2297 continue;
2298 }
2299
2300 q = (struct dn_flow_queue *)(fs+1);
2301 sprintf(prefix, "q%05d: weight %d pipe %d ",
2302 fs->fs_nr, fs->weight, fs->parent_nr);
2303 print_flowset_parms(fs, prefix);
2304 list_queues(fs, q);
2305 }
2306}
2307
2308/*
2309 * This one handles all set-related commands
2310 * ipfw set { show | enable | disable }
2311 * ipfw set swap X Y
2312 * ipfw set move X to Y
2313 * ipfw set move rule X to Y
2314 */
2315static void
2316sets_handler(int ac, char *av[])
2317{
2318 uint32_t set_disable, masks[2];
2319 int i, nbytes;
2320 uint16_t rulenum;
2321 uint8_t cmd, new_set;
2322
2323 ac--;
2324 av++;
2325
2326 if (!ac)
2327 errx(EX_USAGE, "set needs command");
2328 if (_substrcmp(*av, "show") == 0) {
2329 void *data;
2330 char const *msg;
2331
2332 nbytes = sizeof(struct ip_fw);
2333 if ((data = calloc(1, nbytes)) == NULL)
2334 err(EX_OSERR, "calloc");
2335 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
2336 err(EX_OSERR, "getsockopt(IP_FW_GET)");
2337 bcopy(&((struct ip_fw *)data)->next_rule,
2338 &set_disable, sizeof(set_disable));
2339
2340 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
2341 if ((set_disable & (1<<i))) {
2342 printf("%s %d", msg, i);
2343 msg = "";
2344 }
2345 msg = (set_disable) ? " enable" : "enable";
2346 for (i = 0; i < RESVD_SET; i++)
2347 if (!(set_disable & (1<<i))) {
2348 printf("%s %d", msg, i);
2349 msg = "";
2350 }
2351 printf("\n");
2352 } else if (_substrcmp(*av, "swap") == 0) {
2353 ac--; av++;
2354 if (ac != 2)
2355 errx(EX_USAGE, "set swap needs 2 set numbers\n");
2356 rulenum = atoi(av[0]);
2357 new_set = atoi(av[1]);
2358 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
2359 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2360 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
2361 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2362 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
2363 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2364 } else if (_substrcmp(*av, "move") == 0) {
2365 ac--; av++;
2366 if (ac && _substrcmp(*av, "rule") == 0) {
2367 cmd = 2;
2368 ac--; av++;
2369 } else
2370 cmd = 3;
2371 if (ac != 3 || _substrcmp(av[1], "to") != 0)
2372 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2373 rulenum = atoi(av[0]);
2374 new_set = atoi(av[2]);
2375 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
2376 (cmd == 2 && rulenum == 65535) )
2377 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2378 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
2379 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2380 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
2381 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
2382 } else if (_substrcmp(*av, "disable") == 0 ||
2383 _substrcmp(*av, "enable") == 0 ) {
2384 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2385
2386 ac--; av++;
2387 masks[0] = masks[1] = 0;
2388
2389 while (ac) {
2390 if (isdigit(**av)) {
2391 i = atoi(*av);
2392 if (i < 0 || i > RESVD_SET)
2393 errx(EX_DATAERR,
2394 "invalid set number %d\n", i);
2395 masks[which] |= (1<<i);
2396 } else if (_substrcmp(*av, "disable") == 0)
2397 which = 0;
2398 else if (_substrcmp(*av, "enable") == 0)
2399 which = 1;
2400 else
2401 errx(EX_DATAERR,
2402 "invalid set command %s\n", *av);
2403 av++; ac--;
2404 }
2405 if ( (masks[0] & masks[1]) != 0 )
2406 errx(EX_DATAERR,
2407 "cannot enable and disable the same set\n");
2408
2409 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
2410 if (i)
2411 warn("set enable/disable: setsockopt(IP_FW_DEL)");
2412 } else
2413 errx(EX_USAGE, "invalid set command %s\n", *av);
2414}
2415
2416static void
2417sysctl_handler(int ac, char *av[], int which)
2418{
2419 ac--;
2420 av++;
2421
2422 if (ac == 0) {
2423 warnx("missing keyword to enable/disable\n");
2424 } else if (_substrcmp(*av, "firewall") == 0) {
2425 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2426 &which, sizeof(which));
2427 } else if (_substrcmp(*av, "one_pass") == 0) {
2428 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2429 &which, sizeof(which));
2430 } else if (_substrcmp(*av, "debug") == 0) {
2431 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2432 &which, sizeof(which));
2433 } else if (_substrcmp(*av, "verbose") == 0) {
2434 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2435 &which, sizeof(which));
2436 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2437 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2438 &which, sizeof(which));
2439 } else if (_substrcmp(*av, "altq") == 0) {
2440 altq_set_enabled(which);
2441 } else {
2442 warnx("unrecognize enable/disable keyword: %s\n", *av);
2443 }
2444}
2445
2446static void
2447list(int ac, char *av[], int show_counters)
2448{
2449 struct ip_fw *r;
2450 ipfw_dyn_rule *dynrules, *d;
2451
2452#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
2453 char *lim;
2454 void *data = NULL;
2455 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
2456 int exitval = EX_OK;
2457 int lac;
2458 char **lav;
2459 u_long rnum, last;
2460 char *endptr;
2461 int seen = 0;
2462
2463 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
2464 int nalloc = 1024; /* start somewhere... */
2465
2466 last = 0;
2467
2468 if (test_only) {
2469 fprintf(stderr, "Testing only, list disabled\n");
2470 return;
2471 }
2472
2473 ac--;
2474 av++;
2475
2476 /* get rules or pipes from kernel, resizing array as necessary */
2477 nbytes = nalloc;
2478
2479 while (nbytes >= nalloc) {
2480 nalloc = nalloc * 2 + 200;
2481 nbytes = nalloc;
2482 if ((data = realloc(data, nbytes)) == NULL)
2483 err(EX_OSERR, "realloc");
2484 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
2485 err(EX_OSERR, "getsockopt(IP_%s_GET)",
2486 do_pipe ? "DUMMYNET" : "FW");
2487 }
2488
2489 if (do_pipe) {
2490 list_pipes(data, nbytes, ac, av);
2491 goto done;
2492 }
2493
2494 /*
2495 * Count static rules. They have variable size so we
2496 * need to scan the list to count them.
2497 */
2498 for (nstat = 1, r = data, lim = (char *)data + nbytes;
2499 r->rulenum < 65535 && (char *)r < lim;
2500 ++nstat, r = NEXT(r) )
2501 ; /* nothing */
2502
2503 /*
2504 * Count dynamic rules. This is easier as they have
2505 * fixed size.
2506 */
2507 r = NEXT(r);
2508 dynrules = (ipfw_dyn_rule *)r ;
2509 n = (char *)r - (char *)data;
2510 ndyn = (nbytes - n) / sizeof *dynrules;
2511
2512 /* if showing stats, figure out column widths ahead of time */
2513 bcwidth = pcwidth = 0;
2514 if (show_counters) {
2515 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2516 /* packet counter */
2517 width = snprintf(NULL, 0, "%llu",
2518 align_uint64(&r->pcnt));
2519 if (width > pcwidth)
2520 pcwidth = width;
2521
2522 /* byte counter */
2523 width = snprintf(NULL, 0, "%llu",
2524 align_uint64(&r->bcnt));
2525 if (width > bcwidth)
2526 bcwidth = width;
2527 }
2528 }
2529 if (do_dynamic && ndyn) {
2530 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2531 width = snprintf(NULL, 0, "%llu",
2532 align_uint64(&d->pcnt));
2533 if (width > pcwidth)
2534 pcwidth = width;
2535
2536 width = snprintf(NULL, 0, "%llu",
2537 align_uint64(&d->bcnt));
2538 if (width > bcwidth)
2539 bcwidth = width;
2540 }
2541 }
2542 /* if no rule numbers were specified, list all rules */
2543 if (ac == 0) {
2544 for (n = 0, r = data; n < nstat; n++, r = NEXT(r) )
2545 show_ipfw(r, pcwidth, bcwidth);
2546
2547 if (do_dynamic && ndyn) {
2548 printf("## Dynamic rules (%d):\n", ndyn);
2549 for (n = 0, d = dynrules; n < ndyn; n++, d++)
2550 show_dyn_ipfw(d, pcwidth, bcwidth);
2551 }
2552 goto done;
2553 }
2554
2555 /* display specific rules requested on command line */
2556
2557 for (lac = ac, lav = av; lac != 0; lac--) {
2558 /* convert command line rule # */
2559 last = rnum = strtoul(*lav++, &endptr, 10);
2560 if (*endptr == '-')
2561 last = strtoul(endptr+1, &endptr, 10);
2562 if (*endptr) {
2563 exitval = EX_USAGE;
2564 warnx("invalid rule number: %s", *(lav - 1));
2565 continue;
2566 }
2567 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
2568 if (r->rulenum > last)
2569 break;
2570 if (r->rulenum >= rnum && r->rulenum <= last) {
2571 show_ipfw(r, pcwidth, bcwidth);
2572 seen = 1;
2573 }
2574 }
2575 if (!seen) {
2576 /* give precedence to other error(s) */
2577 if (exitval == EX_OK)
2578 exitval = EX_UNAVAILABLE;
2579 warnx("rule %lu does not exist", rnum);
2580 }
2581 }
2582
2583 if (do_dynamic && ndyn) {
2584 printf("## Dynamic rules:\n");
2585 for (lac = ac, lav = av; lac != 0; lac--) {
2586 last = rnum = strtoul(*lav++, &endptr, 10);
2587 if (*endptr == '-')
2588 last = strtoul(endptr+1, &endptr, 10);
2589 if (*endptr)
2590 /* already warned */
2591 continue;
2592 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2593 uint16_t rulenum;
2594
2595 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2596 if (rulenum > rnum)
2597 break;
2598 if (r->rulenum >= rnum && r->rulenum <= last)
2599 show_dyn_ipfw(d, pcwidth, bcwidth);
2600 }
2601 }
2602 }
2603
2604 ac = 0;
2605
2606done:
2607 free(data);
2608
2609 if (exitval != EX_OK)
2610 exit(exitval);
2611#undef NEXT
2612}
2613
2614static void
2615show_usage(void)
2616{
2617 fprintf(stderr, "usage: ipfw [options]\n"
2618"do \"ipfw -h\" or see ipfw manpage for details\n"
2619);
2620 exit(EX_USAGE);
2621}
2622
2623static void
2624help(void)
2625{
2626 fprintf(stderr,
2627"ipfw syntax summary (but please do read the ipfw(8) manpage):\n"
2628"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n"
2629"add [num] [set N] [prob x] RULE-BODY\n"
2630"{pipe|queue} N config PIPE-BODY\n"
2631"[pipe|queue] {zero|delete|show} [N{,N}]\n"
2632"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n"
2633"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n"
2634"\n"
2635"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n"
2636"ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n"
2637" skipto N | {divert|tee} PORT | forward ADDR |\n"
2638" pipe N | queue N\n"
2639"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n"
2640"ADDR: [ MAC dst src ether_type ] \n"
2641" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n"
2642" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n"
2643"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n"
2644"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n"
2645"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n"
2646"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n"
2647"OPTION_LIST: OPTION [OPTION_LIST]\n"
2648"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n"
2649" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n"
2650" {dst-port|src-port} LIST |\n"
2651" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n"
2652" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n"
2653" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n"
2654" icmp6types LIST | ext6hdr LIST | flow-id N[,N] |\n"
2655" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n"
2656" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n"
2657" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n"
2658);
2659exit(0);
2660}
2661
2662
2663static int
2664lookup_host (char *host, struct in_addr *ipaddr)
2665{
2666 struct hostent *he;
2667
2668 if (!inet_aton(host, ipaddr)) {
2669 if ((he = gethostbyname(host)) == NULL)
2670 return(-1);
2671 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2672 }
2673 return(0);
2674}
2675
2676/*
2677 * fills the addr and mask fields in the instruction as appropriate from av.
2678 * Update length as appropriate.
2679 * The following formats are allowed:
2680 * me returns O_IP_*_ME
2681 * 1.2.3.4 single IP address
2682 * 1.2.3.4:5.6.7.8 address:mask
2683 * 1.2.3.4/24 address/mask
2684 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
2685 * We can have multiple comma-separated address/mask entries.
2686 */
2687static void
2688fill_ip(ipfw_insn_ip *cmd, char *av)
2689{
2690 int len = 0;
2691 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2692
2693 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2694
2695 if (_substrcmp(av, "any") == 0)
2696 return;
2697
2698 if (_substrcmp(av, "me") == 0) {
2699 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2700 return;
2701 }
2702
2703 if (strncmp(av, "table(", 6) == 0) {
2704 char *p = strchr(av + 6, ',');
2705
2706 if (p)
2707 *p++ = '\0';
2708 cmd->o.opcode = O_IP_DST_LOOKUP;
2709 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2710 if (p) {
2711 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2712 d[0] = strtoul(p, NULL, 0);
2713 } else
2714 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2715 return;
2716 }
2717
2718 while (av) {
2719 /*
2720 * After the address we can have '/' or ':' indicating a mask,
2721 * ',' indicating another address follows, '{' indicating a
2722 * set of addresses of unspecified size.
2723 */
2724 char *p = strpbrk(av, "/:,{");
2725 int masklen;
2726 char md;
2727
2728 if (p) {
2729 md = *p;
2730 *p++ = '\0';
2731 } else
2732 md = '\0';
2733
2734 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2735 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2736 switch (md) {
2737 case ':':
2738 if (!inet_aton(p, (struct in_addr *)&d[1]))
2739 errx(EX_DATAERR, "bad netmask ``%s''", p);
2740 break;
2741 case '/':
2742 masklen = atoi(p);
2743 if (masklen == 0)
2744 d[1] = htonl(0); /* mask */
2745 else if (masklen > 32)
2746 errx(EX_DATAERR, "bad width ``%s''", p);
2747 else
2748 d[1] = htonl(~0 << (32 - masklen));
2749 break;
2750 case '{': /* no mask, assume /24 and put back the '{' */
2751 d[1] = htonl(~0 << (32 - 24));
2752 *(--p) = md;
2753 break;
2754
2755 case ',': /* single address plus continuation */
2756 *(--p) = md;
2757 /* FALLTHROUGH */
2758 case 0: /* initialization value */
2759 default:
2760 d[1] = htonl(~0); /* force /32 */
2761 break;
2762 }
2763 d[0] &= d[1]; /* mask base address with mask */
2764 /* find next separator */
2765 if (p)
2766 p = strpbrk(p, ",{");
2767 if (p && *p == '{') {
2768 /*
2769 * We have a set of addresses. They are stored as follows:
2770 * arg1 is the set size (powers of 2, 2..256)
2771 * addr is the base address IN HOST FORMAT
2772 * mask.. is an array of arg1 bits (rounded up to
2773 * the next multiple of 32) with bits set
2774 * for each host in the map.
2775 */
2776 uint32_t *map = (uint32_t *)&cmd->mask;
2777 int low, high;
2778 int i = contigmask((uint8_t *)&(d[1]), 32);
2779
2780 if (len > 0)
2781 errx(EX_DATAERR, "address set cannot be in a list");
2782 if (i < 24 || i > 31)
2783 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2784 cmd->o.arg1 = 1<<(32-i); /* map length */
2785 d[0] = ntohl(d[0]); /* base addr in host format */
2786 cmd->o.opcode = O_IP_DST_SET; /* default */
2787 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2788 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2789 map[i] = 0; /* clear map */
2790
2791 av = p + 1;
2792 low = d[0] & 0xff;
2793 high = low + cmd->o.arg1 - 1;
2794 /*
2795 * Here, i stores the previous value when we specify a range
2796 * of addresses within a mask, e.g. 45-63. i = -1 means we
2797 * have no previous value.
2798 */
2799 i = -1; /* previous value in a range */
2800 while (isdigit(*av)) {
2801 char *s;
2802 int a = strtol(av, &s, 0);
2803
2804 if (s == av) { /* no parameter */
2805 if (*av != '}')
2806 errx(EX_DATAERR, "set not closed\n");
2807 if (i != -1)
2808 errx(EX_DATAERR, "incomplete range %d-", i);
2809 break;
2810 }
2811 if (a < low || a > high)
2812 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2813 a, low, high);
2814 a -= low;
2815 if (i == -1) /* no previous in range */
2816 i = a;
2817 else { /* check that range is valid */
2818 if (i > a)
2819 errx(EX_DATAERR, "invalid range %d-%d",
2820 i+low, a+low);
2821 if (*s == '-')
2822 errx(EX_DATAERR, "double '-' in range");
2823 }
2824 for (; i <= a; i++)
2825 map[i/32] |= 1<<(i & 31);
2826 i = -1;
2827 if (*s == '-')
2828 i = a;
2829 else if (*s == '}')
2830 break;
2831 av = s+1;
2832 }
2833 return;
2834 }
2835 av = p;
2836 if (av) /* then *av must be a ',' */
2837 av++;
2838
2839 /* Check this entry */
2840 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2841 /*
2842 * 'any' turns the entire list into a NOP.
2843 * 'not any' never matches, so it is removed from the
2844 * list unless it is the only item, in which case we
2845 * report an error.
2846 */
2847 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2848 if (av == NULL && len == 0) /* only this entry */
2849 errx(EX_DATAERR, "not any never matches");
2850 }
2851 /* else do nothing and skip this entry */
2852 return;
2853 }
2854 /* A single IP can be stored in an optimized format */
2855 if (d[1] == IP_MASK_ALL && av == NULL && len == 0) {
2856 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2857 return;
2858 }
2859 len += 2; /* two words... */
2860 d += 2;
2861 } /* end while */
2862 cmd->o.len |= len+1;
2863}
2864
2865
2866/* Try to find ipv6 address by hostname */
2867static int
2868lookup_host6 (char *host, struct in6_addr *ip6addr)
2869{
2870 struct hostent *he;
2871
2872 if (!inet_pton(AF_INET6, host, ip6addr)) {
2873 if ((he = gethostbyname2(host, AF_INET6)) == NULL)
2874 return(-1);
2875 memcpy(ip6addr, he->h_addr_list[0], sizeof( struct in6_addr));
2876 }
2877 return(0);
2878}
2879
2880
2881/* n2mask sets n bits of the mask */
2882static void
2883n2mask(struct in6_addr *mask, int n)
2884{
2885 static int minimask[9] =
2886 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2887 u_char *p;
2888
2889 memset(mask, 0, sizeof(struct in6_addr));
2890 p = (u_char *) mask;
2891 for (; n > 0; p++, n -= 8) {
2892 if (n >= 8)
2893 *p = 0xff;
2894 else
2895 *p = minimask[n];
2896 }
2897 return;
2898}
2899
2900
2901/*
2902 * fill the addr and mask fields in the instruction as appropriate from av.
2903 * Update length as appropriate.
2904 * The following formats are allowed:
2905 * any matches any IP6. Actually returns an empty instruction.
2906 * me returns O_IP6_*_ME
2907 *
2908 * 03f1::234:123:0342 single IP6 addres
2909 * 03f1::234:123:0342/24 address/mask
2910 * 03f1::234:123:0342/24,03f1::234:123:0343/ List of address
2911 *
2912 * Set of address (as in ipv6) not supported because ipv6 address
2913 * are typically random past the initial prefix.
2914 * Return 1 on success, 0 on failure.
2915 */
2916static int
2917fill_ip6(ipfw_insn_ip6 *cmd, char *av)
2918{
2919 int len = 0;
2920 struct in6_addr *d = &(cmd->addr6);
2921 /*
2922 * Needed for multiple address.
2923 * Note d[1] points to struct in6_add r mask6 of cmd
2924 */
2925
2926 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2927
2928 if (strcmp(av, "any") == 0)
2929 return (1);
2930
2931
2932 if (strcmp(av, "me") == 0) { /* Set the data for "me" opt*/
2933 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2934 return (1);
2935 }
2936
2937 if (strcmp(av, "me6") == 0) { /* Set the data for "me" opt*/
2938 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2939 return (1);
2940 }
2941
2942 av = strdup(av);
2943 while (av) {
2944 /*
2945 * After the address we can have '/' indicating a mask,
2946 * or ',' indicating another address follows.
2947 */
2948
2949 char *p;
2950 int masklen;
2951 char md = '\0';
2952
2953 if ((p = strpbrk(av, "/,")) ) {
2954 md = *p; /* save the separator */
2955 *p = '\0'; /* terminate address string */
2956 p++; /* and skip past it */
2957 }
2958 /* now p points to NULL, mask or next entry */
2959
2960 /* lookup stores address in *d as a side effect */
2961 if (lookup_host6(av, d) != 0) {
2962 /* XXX: failed. Free memory and go */
2963 errx(EX_DATAERR, "bad address \"%s\"", av);
2964 }
2965 /* next, look at the mask, if any */
2966 masklen = (md == '/') ? atoi(p) : 128;
2967 if (masklen > 128 || masklen < 0)
2968 errx(EX_DATAERR, "bad width \"%s\''", p);
2969 else
2970 n2mask(&d[1], masklen);
2971
2972 APPLY_MASK(d, &d[1]) /* mask base address with mask */
2973
2974 /* find next separator */
2975
2976 if (md == '/') { /* find separator past the mask */
2977 p = strpbrk(p, ",");
2978 if (p != NULL)
2979 p++;
2980 }
2981 av = p;
2982
2983 /* Check this entry */
2984 if (masklen == 0) {
2985 /*
2986 * 'any' turns the entire list into a NOP.
2987 * 'not any' never matches, so it is removed from the
2988 * list unless it is the only item, in which case we
2989 * report an error.
2990 */
2991 if (cmd->o.len & F_NOT && av == NULL && len == 0)
2992 errx(EX_DATAERR, "not any never matches");
2993 continue;
2994 }
2995
2996 /*
2997 * A single IP can be stored alone
2998 */
2999 if (masklen == 128 && av == NULL && len == 0) {
3000 len = F_INSN_SIZE(struct in6_addr);
3001 break;
3002 }
3003
3004 /* Update length and pointer to arguments */
3005 len += F_INSN_SIZE(struct in6_addr)*2;
3006 d += 2;
3007 } /* end while */
3008
3009 /*
3010 * Total length of the command, remember that 1 is the size of
3011 * the base command.
3012 */
3013 cmd->o.len |= len+1;
3014 free(av);
3015 return (1);
3016}
3017
3018/*
3019 * fills command for ipv6 flow-id filtering
3020 * note that the 20 bit flow number is stored in a array of u_int32_t
3021 * it's supported lists of flow-id, so in the o.arg1 we store how many
3022 * additional flow-id we want to filter, the basic is 1
3023 */
3024void
3025fill_flow6( ipfw_insn_u32 *cmd, char *av )
3026{
3027 u_int32_t type; /* Current flow number */
3028 u_int16_t nflow = 0; /* Current flow index */
3029 char *s = av;
3030 cmd->d[0] = 0; /* Initializing the base number*/
3031
3032 while (s) {
3033 av = strsep( &s, ",") ;
3034 type = strtoul(av, &av, 0);
3035 if (*av != ',' && *av != '\0')
3036 errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
3037 if (type > 0xfffff)
3038 errx(EX_DATAERR, "flow number out of range %s", av);
3039 cmd->d[nflow] |= type;
3040 nflow++;
3041 }
3042 if( nflow > 0 ) {
3043 cmd->o.opcode = O_FLOW6ID;
3044 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + nflow;
3045 cmd->o.arg1 = nflow;
3046 }
3047 else {
3048 errx(EX_DATAERR, "invalid ipv6 flow number %s", av);
3049 }
3050}
3051
3052static ipfw_insn *
3053add_srcip6(ipfw_insn *cmd, char *av)
3054{
3055
3056 fill_ip6((ipfw_insn_ip6 *)cmd, av);
3057 if (F_LEN(cmd) == 0) /* any */
3058 ;
3059 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */
3060 cmd->opcode = O_IP6_SRC_ME;
3061 } else if (F_LEN(cmd) ==
3062 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
3063 /* single IP, no mask*/
3064 cmd->opcode = O_IP6_SRC;
3065 } else { /* addr/mask opt */
3066 cmd->opcode = O_IP6_SRC_MASK;
3067 }
3068 return cmd;
3069}
3070
3071static ipfw_insn *
3072add_dstip6(ipfw_insn *cmd, char *av)
3073{
3074
3075 fill_ip6((ipfw_insn_ip6 *)cmd, av);
3076 if (F_LEN(cmd) == 0) /* any */
3077 ;
3078 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) { /* "me" */
3079 cmd->opcode = O_IP6_DST_ME;
3080 } else if (F_LEN(cmd) ==
3081 (F_INSN_SIZE(struct in6_addr) + F_INSN_SIZE(ipfw_insn))) {
3082 /* single IP, no mask*/
3083 cmd->opcode = O_IP6_DST;
3084 } else { /* addr/mask opt */
3085 cmd->opcode = O_IP6_DST_MASK;
3086 }
3087 return cmd;
3088}
3089
3090
3091/*
3092 * helper function to process a set of flags and set bits in the
3093 * appropriate masks.
3094 */
3095static void
3096fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3097 struct _s_x *flags, char *p)
3098{
3099 uint8_t set=0, clear=0;
3100
3101 while (p && *p) {
3102 char *q; /* points to the separator */
3103 int val;
3104 uint8_t *which; /* mask we are working on */
3105
3106 if (*p == '!') {
3107 p++;
3108 which = &clear;
3109 } else
3110 which = &set;
3111 q = strchr(p, ',');
3112 if (q)
3113 *q++ = '\0';
3114 val = match_token(flags, p);
3115 if (val <= 0)
3116 errx(EX_DATAERR, "invalid flag %s", p);
3117 *which |= (uint8_t)val;
3118 p = q;
3119 }
3120 cmd->opcode = opcode;
3121 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
3122 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3123}
3124
3125
3126static void
3127delete(int ac, char *av[])
3128{
3129 uint32_t rulenum;
3130 struct dn_pipe p;
3131 int i;
3132 int exitval = EX_OK;
3133 int do_set = 0;
3134
3135 memset(&p, 0, sizeof p);
3136
3137 av++; ac--;
3138 NEED1("missing rule specification");
3139 if (ac > 0 && _substrcmp(*av, "set") == 0) {
3140 do_set = 1; /* delete set */
3141 ac--; av++;
3142 }
3143
3144 /* Rule number */
3145 while (ac && isdigit(**av)) {
3146 i = atoi(*av); av++; ac--;
3147 if (do_pipe) {
3148 if (do_pipe == 1)
3149 p.pipe_nr = i;
3150 else
3151 p.fs.fs_nr = i;
3152 i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p);
3153 if (i) {
3154 exitval = 1;
3155 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
3156 do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr);
3157 }
3158 } else {
3159 rulenum = (i & 0xffff) | (do_set << 24);
3160 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
3161 if (i) {
3162 exitval = EX_UNAVAILABLE;
3163 warn("rule %u: setsockopt(IP_FW_DEL)",
3164 rulenum);
3165 }
3166 }
3167 }
3168 if (exitval != EX_OK)
3169 exit(exitval);
3170}
3171
3172
3173/*
3174 * fill the interface structure. We do not check the name as we can
3175 * create interfaces dynamically, so checking them at insert time
3176 * makes relatively little sense.
3177 * Interface names containing '*', '?', or '[' are assumed to be shell
3178 * patterns which match interfaces.
3179 */
3180static void
3181fill_iface(ipfw_insn_if *cmd, char *arg)
3182{
3183 cmd->name[0] = '\0';
3184 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3185
3186 /* Parse the interface or address */
3187 if (strcmp(arg, "any") == 0)
3188 cmd->o.len = 0; /* effectively ignore this command */
3189 else if (!isdigit(*arg)) {
3190 strlcpy(cmd->name, arg, sizeof(cmd->name));
3191 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3192 } else if (!inet_aton(arg, &cmd->p.ip))
3193 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3194}
3195
3196static void
3197config_pipe(int ac, char **av)
3198{
3199 struct dn_pipe p;
3200 int i;
3201 char *end;
3202 void *par = NULL;
3203
3204 memset(&p, 0, sizeof p);
3205
3206 av++; ac--;
3207 /* Pipe number */
3208 if (ac && isdigit(**av)) {
3209 i = atoi(*av); av++; ac--;
3210 if (do_pipe == 1)
3211 p.pipe_nr = i;
3212 else
3213 p.fs.fs_nr = i;
3214 }
3215 while (ac > 0) {
3216 double d;
3217 int tok = match_token(dummynet_params, *av);
3218 ac--; av++;
3219
3220 switch(tok) {
3221 case TOK_NOERROR:
3222 p.fs.flags_fs |= DN_NOERROR;
3223 break;
3224
3225 case TOK_PLR:
3226 NEED1("plr needs argument 0..1\n");
3227 d = strtod(av[0], NULL);
3228 if (d > 1)
3229 d = 1;
3230 else if (d < 0)
3231 d = 0;
3232 p.fs.plr = (int)(d*0x7fffffff);
3233 ac--; av++;
3234 break;
3235
3236 case TOK_QUEUE:
3237 NEED1("queue needs queue size\n");
3238 end = NULL;
3239 p.fs.qsize = strtoul(av[0], &end, 0);
3240 if (*end == 'K' || *end == 'k') {
3241 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
3242 p.fs.qsize *= 1024;
3243 } else if (*end == 'B' ||
3244 _substrcmp2(end, "by", "bytes") == 0) {
3245 p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
3246 }
3247 ac--; av++;
3248 break;
3249
3250 case TOK_BUCKETS:
3251 NEED1("buckets needs argument\n");
3252 p.fs.rq_size = strtoul(av[0], NULL, 0);
3253 ac--; av++;
3254 break;
3255
3256 case TOK_MASK:
3257 NEED1("mask needs mask specifier\n");
3258 /*
3259 * per-flow queue, mask is dst_ip, dst_port,
3260 * src_ip, src_port, proto measured in bits
3261 */
3262 par = NULL;
3263
3264 bzero(&p.fs.flow_mask, sizeof(p.fs.flow_mask));
3265 end = NULL;
3266
3267 while (ac >= 1) {
3268 uint32_t *p32 = NULL;
3269 uint16_t *p16 = NULL;
3270 uint32_t *p20 = NULL;
3271 struct in6_addr *pa6 = NULL;
3272 uint32_t a;
3273
3274 tok = match_token(dummynet_params, *av);
3275 ac--; av++;
3276 switch(tok) {
3277 case TOK_ALL:
3278 /*
3279 * special case, all bits significant
3280 */
3281 p.fs.flow_mask.dst_ip = ~0;
3282 p.fs.flow_mask.src_ip = ~0;
3283 p.fs.flow_mask.dst_port = ~0;
3284 p.fs.flow_mask.src_port = ~0;
3285 p.fs.flow_mask.proto = ~0;
3286 n2mask(&(p.fs.flow_mask.dst_ip6), 128);
3287 n2mask(&(p.fs.flow_mask.src_ip6), 128);
3288 p.fs.flow_mask.flow_id6 = ~0;
3289 p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
3290 goto end_mask;
3291
3292 case TOK_DSTIP:
3293 p32 = &p.fs.flow_mask.dst_ip;
3294 break;
3295
3296 case TOK_SRCIP:
3297 p32 = &p.fs.flow_mask.src_ip;
3298 break;
3299
3300 case TOK_DSTIP6:
3301 pa6 = &(p.fs.flow_mask.dst_ip6);
3302 break;
3303
3304 case TOK_SRCIP6:
3305 pa6 = &(p.fs.flow_mask.src_ip6);
3306 break;
3307
3308 case TOK_FLOWID:
3309 p20 = &p.fs.flow_mask.flow_id6;
3310 break;
3311
3312 case TOK_DSTPORT:
3313 p16 = &p.fs.flow_mask.dst_port;
3314 break;
3315
3316 case TOK_SRCPORT:
3317 p16 = &p.fs.flow_mask.src_port;
3318 break;
3319
3320 case TOK_PROTO:
3321 break;
3322
3323 default:
3324 ac++; av--; /* backtrack */
3325 goto end_mask;
3326 }
3327 if (ac < 1)
3328 errx(EX_USAGE, "mask: value missing");
3329 if (*av[0] == '/') {
3330 a = strtoul(av[0]+1, &end, 0);
3331 if (pa6 == NULL)
3332 a = (a == 32) ? ~0 : (1 << a) - 1;
3333 } else
3334 a = strtoul(av[0], &end, 0);
3335 if (p32 != NULL)
3336 *p32 = a;
3337 else if (p16 != NULL) {
3338 if (a > 0xFFFF)
3339 errx(EX_DATAERR,
3340 "port mask must be 16 bit");
3341 *p16 = (uint16_t)a;
3342 } else if (p20 != NULL) {
3343 if (a > 0xfffff)
3344 errx(EX_DATAERR,
3345 "flow_id mask must be 20 bit");
3346 *p20 = (uint32_t)a;
3347 } else if (pa6 != NULL) {
3348 if (a < 0 || a > 128)
3349 errx(EX_DATAERR,
3350 "in6addr invalid mask len");
3351 else
3352 n2mask(pa6, a);
3353 } else {
3354 if (a > 0xFF)
3355 errx(EX_DATAERR,
3356 "proto mask must be 8 bit");
3357 p.fs.flow_mask.proto = (uint8_t)a;
3358 }
3359 if (a != 0)
3360 p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
3361 ac--; av++;
3362 } /* end while, config masks */
3363end_mask:
3364 break;
3365
3366 case TOK_RED:
3367 case TOK_GRED:
3368 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
3369 p.fs.flags_fs |= DN_IS_RED;
3370 if (tok == TOK_GRED)
3371 p.fs.flags_fs |= DN_IS_GENTLE_RED;
3372 /*
3373 * the format for parameters is w_q/min_th/max_th/max_p
3374 */
3375 if ((end = strsep(&av[0], "/"))) {
3376 double w_q = strtod(end, NULL);
3377 if (w_q > 1 || w_q <= 0)
3378 errx(EX_DATAERR, "0 < w_q <= 1");
3379 p.fs.w_q = (int) (w_q * (1 << SCALE_RED));
3380 }
3381 if ((end = strsep(&av[0], "/"))) {
3382 p.fs.min_th = strtoul(end, &end, 0);
3383 if (*end == 'K' || *end == 'k')
3384 p.fs.min_th *= 1024;
3385 }
3386 if ((end = strsep(&av[0], "/"))) {
3387 p.fs.max_th = strtoul(end, &end, 0);
3388 if (*end == 'K' || *end == 'k')
3389 p.fs.max_th *= 1024;
3390 }
3391 if ((end = strsep(&av[0], "/"))) {
3392 double max_p = strtod(end, NULL);
3393 if (max_p > 1 || max_p <= 0)
3394 errx(EX_DATAERR, "0 < max_p <= 1");
3395 p.fs.max_p = (int)(max_p * (1 << SCALE_RED));
3396 }
3397 ac--; av++;
3398 break;
3399
3400 case TOK_DROPTAIL:
3401 p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
3402 break;
3403
3404 case TOK_BW:
3405 NEED1("bw needs bandwidth or interface\n");
3406 if (do_pipe != 1)
3407 errx(EX_DATAERR, "bandwidth only valid for pipes");
3408 /*
3409 * set clocking interface or bandwidth value
3410 */
3411 if (av[0][0] >= 'a' && av[0][0] <= 'z') {
3412 int l = sizeof(p.if_name)-1;
3413 /* interface name */
3414 strncpy(p.if_name, av[0], l);
3415 p.if_name[l] = '\0';
3416 p.bandwidth = 0;
3417 } else {
3418 p.if_name[0] = '\0';
3419 p.bandwidth = strtoul(av[0], &end, 0);
3420 if (*end == 'K' || *end == 'k') {
3421 end++;
3422 p.bandwidth *= 1000;
3423 } else if (*end == 'M') {
3424 end++;
3425 p.bandwidth *= 1000000;
3426 }
3427 if ((*end == 'B' &&
3428 _substrcmp2(end, "Bi", "Bit/s") != 0) ||
3429 _substrcmp2(end, "by", "bytes") == 0)
3430 p.bandwidth *= 8;
3431 if (p.bandwidth < 0)
3432 errx(EX_DATAERR, "bandwidth too large");
3433 }
3434 ac--; av++;
3435 break;
3436
3437 case TOK_DELAY:
3438 if (do_pipe != 1)
3439 errx(EX_DATAERR, "delay only valid for pipes");
3440 NEED1("delay needs argument 0..10000ms\n");
3441 p.delay = strtoul(av[0], NULL, 0);
3442 ac--; av++;
3443 break;
3444
3445 case TOK_WEIGHT:
3446 if (do_pipe == 1)
3447 errx(EX_DATAERR,"weight only valid for queues");
3448 NEED1("weight needs argument 0..100\n");
3449 p.fs.weight = strtoul(av[0], &end, 0);
3450 ac--; av++;
3451 break;
3452
3453 case TOK_PIPE:
3454 if (do_pipe == 1)
3455 errx(EX_DATAERR,"pipe only valid for queues");
3456 NEED1("pipe needs pipe_number\n");
3457 p.fs.parent_nr = strtoul(av[0], &end, 0);
3458 ac--; av++;
3459 break;
3460
3461 default:
3462 errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
3463 }
3464 }
3465 if (do_pipe == 1) {
3466 if (p.pipe_nr == 0)
3467 errx(EX_DATAERR, "pipe_nr must be > 0");
3468 if (p.delay > 10000)
3469 errx(EX_DATAERR, "delay must be < 10000");
3470 } else { /* do_pipe == 2, queue */
3471 if (p.fs.parent_nr == 0)
3472 errx(EX_DATAERR, "pipe must be > 0");
3473 if (p.fs.weight >100)
3474 errx(EX_DATAERR, "weight must be <= 100");
3475 }
3476 if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) {
3477 if (p.fs.qsize > 1024*1024)
3478 errx(EX_DATAERR, "queue size must be < 1MB");
3479 } else {
3480 if (p.fs.qsize > 100)
3481 errx(EX_DATAERR, "2 <= queue size <= 100");
3482 }
3483 if (p.fs.flags_fs & DN_IS_RED) {
3484 size_t len;
3485 int lookup_depth, avg_pkt_size;
3486 double s, idle, weight, w_q;
3487 struct clockinfo ck;
3488 int t;
3489
3490 if (p.fs.min_th >= p.fs.max_th)
3491 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
3492 p.fs.min_th, p.fs.max_th);
3493 if (p.fs.max_th == 0)
3494 errx(EX_DATAERR, "max_th must be > 0");
3495
3496 len = sizeof(int);
3497 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
3498 &lookup_depth, &len, NULL, 0) == -1)
3499
3500 errx(1, "sysctlbyname(\"%s\")",
3501 "net.inet.ip.dummynet.red_lookup_depth");
3502 if (lookup_depth == 0)
3503 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
3504 " must be greater than zero");
3505
3506 len = sizeof(int);
3507 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
3508 &avg_pkt_size, &len, NULL, 0) == -1)
3509
3510 errx(1, "sysctlbyname(\"%s\")",
3511 "net.inet.ip.dummynet.red_avg_pkt_size");
3512 if (avg_pkt_size == 0)
3513 errx(EX_DATAERR,
3514 "net.inet.ip.dummynet.red_avg_pkt_size must"
3515 " be greater than zero");
3516
3517 len = sizeof(struct clockinfo);
3518 if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1)
3519 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
3520
3521 /*
3522 * Ticks needed for sending a medium-sized packet.
3523 * Unfortunately, when we are configuring a WF2Q+ queue, we
3524 * do not have bandwidth information, because that is stored
3525 * in the parent pipe, and also we have multiple queues
3526 * competing for it. So we set s=0, which is not very
3527 * correct. But on the other hand, why do we want RED with
3528 * WF2Q+ ?
3529 */
3530 if (p.bandwidth==0) /* this is a WF2Q+ queue */
3531 s = 0;
3532 else
3533 s = ck.hz * avg_pkt_size * 8 / p.bandwidth;
3534
3535 /*
3536 * max idle time (in ticks) before avg queue size becomes 0.
3537 * NOTA: (3/w_q) is approx the value x so that
3538 * (1-w_q)^x < 10^-3.
3539 */
3540 w_q = ((double)p.fs.w_q) / (1 << SCALE_RED);
3541 idle = s * 3. / w_q;
3542 p.fs.lookup_step = (int)idle / lookup_depth;
3543 if (!p.fs.lookup_step)
3544 p.fs.lookup_step = 1;
3545 weight = 1 - w_q;
3546 for (t = p.fs.lookup_step; t > 0; --t)
3547 weight *= weight;
3548 p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
3549 }
3550 i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p);
3551 if (i)
3552 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
3553}
3554
3555static void
3556get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask)
3557{
3558 int i, l;
3559
3560 for (i=0; i<6; i++)
3561 addr[i] = mask[i] = 0;
3562 if (strcmp(p, "any") == 0)
3563 return;
3564
3565 for (i=0; *p && i<6;i++, p++) {
3566 addr[i] = strtol(p, &p, 16);
3567 if (*p != ':') /* we start with the mask */
3568 break;
3569 }
3570 if (*p == '/') { /* mask len */
3571 l = strtol(p+1, &p, 0);
3572 for (i=0; l>0; l -=8, i++)
3573 mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
3574 } else if (*p == '&') { /* mask */
3575 for (i=0, p++; *p && i<6;i++, p++) {
3576 mask[i] = strtol(p, &p, 16);
3577 if (*p != ':')
3578 break;
3579 }
3580 } else if (*p == '\0') {
3581 for (i=0; i<6; i++)
3582 mask[i] = 0xff;
3583 }
3584 for (i=0; i<6; i++)
3585 addr[i] &= mask[i];
3586}
3587
3588/*
3589 * helper function, updates the pointer to cmd with the length
3590 * of the current command, and also cleans up the first word of
3591 * the new command in case it has been clobbered before.
3592 */
3593static ipfw_insn *
3594next_cmd(ipfw_insn *cmd)
3595{
3596 cmd += F_LEN(cmd);
3597 bzero(cmd, sizeof(*cmd));
3598 return cmd;
3599}
3600
3601/*
3602 * Takes arguments and copies them into a comment
3603 */
3604static void
3605fill_comment(ipfw_insn *cmd, int ac, char **av)
3606{
3607 int i, l;
3608 char *p = (char *)(cmd + 1);
3609
3610 cmd->opcode = O_NOP;
3611 cmd->len = (cmd->len & (F_NOT | F_OR));
3612
3613 /* Compute length of comment string. */
3614 for (i = 0, l = 0; i < ac; i++)
3615 l += strlen(av[i]) + 1;
3616 if (l == 0)
3617 return;
3618 if (l > 84)
3619 errx(EX_DATAERR,
3620 "comment too long (max 80 chars)");
3621 l = 1 + (l+3)/4;
3622 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
3623 for (i = 0; i < ac; i++) {
3624 strcpy(p, av[i]);
3625 p += strlen(av[i]);
3626 *p++ = ' ';
3627 }
3628 *(--p) = '\0';
3629}
3630
3631/*
3632 * A function to fill simple commands of size 1.
3633 * Existing flags are preserved.
3634 */
3635static void
3636fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3637{
3638 cmd->opcode = opcode;
3639 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3640 cmd->arg1 = arg;
3641}
3642
3643/*
3644 * Fetch and add the MAC address and type, with masks. This generates one or
3645 * two microinstructions, and returns the pointer to the last one.
3646 */
3647static ipfw_insn *
3648add_mac(ipfw_insn *cmd, int ac, char *av[])
3649{
3650 ipfw_insn_mac *mac;
3651
3652 if (ac < 2)
3653 errx(EX_DATAERR, "MAC dst src");
3654
3655 cmd->opcode = O_MACADDR2;
3656 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3657
3658 mac = (ipfw_insn_mac *)cmd;
3659 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3660 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
3661 return cmd;
3662}
3663
3664static ipfw_insn *
3665add_mactype(ipfw_insn *cmd, int ac, char *av)
3666{
3667 if (ac < 1)
3668 errx(EX_DATAERR, "missing MAC type");
3669 if (strcmp(av, "any") != 0) { /* we have a non-null type */
3670 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
3671 cmd->opcode = O_MAC_TYPE;
3672 return cmd;
3673 } else
3674 return NULL;
3675}
3676
3677static ipfw_insn *
3678add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3679{
3680 struct protoent *pe;
3681 char *ep;
3682 int proto;
3683
3684 proto = strtol(av, &ep, 10);
3685 if (*ep != '\0' || proto <= 0) {
3686 if ((pe = getprotobyname(av)) == NULL)
3687 return NULL;
3688 proto = pe->p_proto;
3689 }
3690
3691 fill_cmd(cmd, O_PROTO, 0, proto);
3692 *protop = proto;
3693 return cmd;
3694}
3695
3696static ipfw_insn *
3697add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3698{
3699 u_char proto = IPPROTO_IP;
3700
3701 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3702 ; /* do not set O_IP4 nor O_IP6 */
3703 else if (strcmp(av, "ip4") == 0)
3704 /* explicit "just IPv4" rule */
3705 fill_cmd(cmd, O_IP4, 0, 0);
3706 else if (strcmp(av, "ip6") == 0) {
3707 /* explicit "just IPv6" rule */
3708 proto = IPPROTO_IPV6;
3709 fill_cmd(cmd, O_IP6, 0, 0);
3710 } else
3711 return add_proto0(cmd, av, protop);
3712
3713 *protop = proto;
3714 return cmd;
3715}
3716
3717static ipfw_insn *
3718add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3719{
3720 u_char proto = IPPROTO_IP;
3721
3722 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3723 ; /* do not set O_IP4 nor O_IP6 */
3724 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3725 /* explicit "just IPv4" rule */
3726 fill_cmd(cmd, O_IP4, 0, 0);
3727 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3728 /* explicit "just IPv6" rule */
3729 proto = IPPROTO_IPV6;
3730 fill_cmd(cmd, O_IP6, 0, 0);
3731 } else
3732 return add_proto0(cmd, av, protop);
3733
3734 *protop = proto;
3735 return cmd;
3736}
3737
3738static ipfw_insn *
3739add_srcip(ipfw_insn *cmd, char *av)
3740{
3741 fill_ip((ipfw_insn_ip *)cmd, av);
3742 if (cmd->opcode == O_IP_DST_SET) /* set */
3743 cmd->opcode = O_IP_SRC_SET;
3744 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3745 cmd->opcode = O_IP_SRC_LOOKUP;
3746 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3747 cmd->opcode = O_IP_SRC_ME;
3748 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3749 cmd->opcode = O_IP_SRC;
3750 else /* addr/mask */
3751 cmd->opcode = O_IP_SRC_MASK;
3752 return cmd;
3753}
3754
3755static ipfw_insn *
3756add_dstip(ipfw_insn *cmd, char *av)
3757{
3758 fill_ip((ipfw_insn_ip *)cmd, av);
3759 if (cmd->opcode == O_IP_DST_SET) /* set */
3760 ;
3761 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3762 ;
3763 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3764 cmd->opcode = O_IP_DST_ME;
3765 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3766 cmd->opcode = O_IP_DST;
3767 else /* addr/mask */
3768 cmd->opcode = O_IP_DST_MASK;
3769 return cmd;
3770}
3771
3772static ipfw_insn *
3773add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
3774{
3775 if (_substrcmp(av, "any") == 0) {
3776 return NULL;
3777 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
3778 /* XXX todo: check that we have a protocol with ports */
3779 cmd->opcode = opcode;
3780 return cmd;
3781 }
3782 return NULL;
3783}
3784
3785static ipfw_insn *
3786add_src(ipfw_insn *cmd, char *av, u_char proto)
3787{
3788 struct in6_addr a;
3789 char *host, *ch;
3790 ipfw_insn *ret = NULL;
3791
3792 if ((host = strdup(av)) == NULL)
3793 return NULL;
3794 if ((ch = strrchr(host, '/')) != NULL)
3795 *ch = '\0';
3796
3797 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3798 inet_pton(AF_INET6, host, &a))
3799 ret = add_srcip6(cmd, av);
3800 /* XXX: should check for IPv4, not !IPv6 */
3801 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3802 !inet_pton(AF_INET6, host, &a)))
3803 ret = add_srcip(cmd, av);
3804 if (ret == NULL && strcmp(av, "any") != 0)
3805 ret = cmd;
3806
3807 free(host);
3808 return ret;
3809}
3810
3811static ipfw_insn *
3812add_dst(ipfw_insn *cmd, char *av, u_char proto)
3813{
3814 struct in6_addr a;
3815 char *host, *ch;
3816 ipfw_insn *ret = NULL;
3817
3818 if ((host = strdup(av)) == NULL)
3819 return NULL;
3820 if ((ch = strrchr(host, '/')) != NULL)
3821 *ch = '\0';
3822
3823 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3824 inet_pton(AF_INET6, host, &a))
3825 ret = add_dstip6(cmd, av);
3826 /* XXX: should check for IPv4, not !IPv6 */
3827 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3828 !inet_pton(AF_INET6, host, &a)))
3829 ret = add_dstip(cmd, av);
3830 if (ret == NULL && strcmp(av, "any") != 0)
3831 ret = cmd;
3832
3833 free(host);
3834 return ret;
3835}
3836
3837/*
3838 * Parse arguments and assemble the microinstructions which make up a rule.
3839 * Rules are added into the 'rulebuf' and then copied in the correct order
3840 * into the actual rule.
3841 *
3842 * The syntax for a rule starts with the action, followed by
3843 * optional action parameters, and the various match patterns.
3844 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3845 * (generated if the rule includes a keep-state option), then the
3846 * various match patterns, log/altq actions, and the actual action.
3847 *
3848 */
3849static void
3850add(int ac, char *av[])
3851{
3852 /*
3853 * rules are added into the 'rulebuf' and then copied in
3854 * the correct order into the actual rule.
3855 * Some things that need to go out of order (prob, action etc.)
3856 * go into actbuf[].
3857 */
3858 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
3859
3860 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3861 ipfw_insn *first_cmd; /* first match pattern */
3862
3863 struct ip_fw *rule;
3864
3865 /*
3866 * various flags used to record that we entered some fields.
3867 */
3868 ipfw_insn *have_state = NULL; /* check-state or keep-state */
3869 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3870 size_t len;
3871
3872 int i;
3873
3874 int open_par = 0; /* open parenthesis ( */
3875
3876 /* proto is here because it is used to fetch ports */
3877 u_char proto = IPPROTO_IP; /* default protocol */
3878
3879 double match_prob = 1; /* match probability, default is always match */
3880
3881 bzero(actbuf, sizeof(actbuf)); /* actions go here */
3882 bzero(cmdbuf, sizeof(cmdbuf));
3883 bzero(rulebuf, sizeof(rulebuf));
3884
3885 rule = (struct ip_fw *)rulebuf;
3886 cmd = (ipfw_insn *)cmdbuf;
3887 action = (ipfw_insn *)actbuf;
3888
3889 av++; ac--;
3890
3891 /* [rule N] -- Rule number optional */
3892 if (ac && isdigit(**av)) {
3893 rule->rulenum = atoi(*av);
3894 av++;
3895 ac--;
3896 }
3897
3898 /* [set N] -- set number (0..RESVD_SET), optional */
3899 if (ac > 1 && _substrcmp(*av, "set") == 0) {
3900 int set = strtoul(av[1], NULL, 10);
3901 if (set < 0 || set > RESVD_SET)
3902 errx(EX_DATAERR, "illegal set %s", av[1]);
3903 rule->set = set;
3904 av += 2; ac -= 2;
3905 }
3906
3907 /* [prob D] -- match probability, optional */
3908 if (ac > 1 && _substrcmp(*av, "prob") == 0) {
3909 match_prob = strtod(av[1], NULL);
3910
3911 if (match_prob <= 0 || match_prob > 1)
3912 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3913 av += 2; ac -= 2;
3914 }
3915
3916 /* action -- mandatory */
3917 NEED1("missing action");
3918 i = match_token(rule_actions, *av);
3919 ac--; av++;
3920 action->len = 1; /* default */
3921 switch(i) {
3922 case TOK_CHECKSTATE:
3923 have_state = action;
3924 action->opcode = O_CHECK_STATE;
3925 break;
3926
3927 case TOK_ACCEPT:
3928 action->opcode = O_ACCEPT;
3929 break;
3930
3931 case TOK_DENY:
3932 action->opcode = O_DENY;
3933 action->arg1 = 0;
3934 break;
3935
3936 case TOK_REJECT:
3937 action->opcode = O_REJECT;
3938 action->arg1 = ICMP_UNREACH_HOST;
3939 break;
3940
3941 case TOK_RESET:
3942 action->opcode = O_REJECT;
3943 action->arg1 = ICMP_REJECT_RST;
3944 break;
3945
3946 case TOK_RESET6:
3947 action->opcode = O_UNREACH6;
3948 action->arg1 = ICMP6_UNREACH_RST;
3949 break;
3950
3951 case TOK_UNREACH:
3952 action->opcode = O_REJECT;
3953 NEED1("missing reject code");
3954 fill_reject_code(&action->arg1, *av);
3955 ac--; av++;
3956 break;
3957
3958 case TOK_UNREACH6:
3959 action->opcode = O_UNREACH6;
3960 NEED1("missing unreach code");
3961 fill_unreach6_code(&action->arg1, *av);
3962 ac--; av++;
3963 break;
3964
3965 case TOK_COUNT:
3966 action->opcode = O_COUNT;
3967 break;
3968
3969 case TOK_QUEUE:
3970 action->opcode = O_QUEUE;
3971 goto chkarg;
3972 case TOK_PIPE:
3973 action->opcode = O_PIPE;
3974 goto chkarg;
3975 case TOK_SKIPTO:
3976 action->opcode = O_SKIPTO;
3977 goto chkarg;
3978 case TOK_NETGRAPH:
3979 action->opcode = O_NETGRAPH;
3980 goto chkarg;
3981 case TOK_NGTEE:
3982 action->opcode = O_NGTEE;
3983 goto chkarg;
3984 case TOK_DIVERT:
3985 action->opcode = O_DIVERT;
3986 goto chkarg;
3987 case TOK_TEE:
3988 action->opcode = O_TEE;
3989chkarg:
3990 if (!ac)
3991 errx(EX_USAGE, "missing argument for %s", *(av - 1));
3992 if (isdigit(**av)) {
3993 action->arg1 = strtoul(*av, NULL, 10);
3994 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3995 errx(EX_DATAERR, "illegal argument for %s",
3996 *(av - 1));
3997 } else if (_substrcmp(*av, TABLEARG) == 0) {
3998 action->arg1 = IP_FW_TABLEARG;
3999 } else if (i == TOK_DIVERT || i == TOK_TEE) {
4000 struct servent *s;
4001 setservent(1);
4002 s = getservbyname(av[0], "divert");
4003 if (s != NULL)
4004 action->arg1 = ntohs(s->s_port);
4005 else
4006 errx(EX_DATAERR, "illegal divert/tee port");
4007 } else
4008 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
4009 ac--; av++;
4010 break;
4011
4012 case TOK_FORWARD: {
4013 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4014 char *s, *end;
4015
4016 NEED1("missing forward address[:port]");
4017
4018 action->opcode = O_FORWARD_IP;
4019 action->len = F_INSN_SIZE(ipfw_insn_sa);
4020
4021 p->sa.sin_len = sizeof(struct sockaddr_in);
4022 p->sa.sin_family = AF_INET;
4023 p->sa.sin_port = 0;
4024 /*
4025 * locate the address-port separator (':' or ',')
4026 */
4027 s = strchr(*av, ':');
4028 if (s == NULL)
4029 s = strchr(*av, ',');
4030 if (s != NULL) {
4031 *(s++) = '\0';
4032 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
4033 if (s == end)
4034 errx(EX_DATAERR,
4035 "illegal forwarding port ``%s''", s);
4036 p->sa.sin_port = (u_short)i;
4037 }
4038 if (_substrcmp(*av, "tablearg") == 0)
4039 p->sa.sin_addr.s_addr = INADDR_ANY;
4040 else
4041 lookup_host(*av, &(p->sa.sin_addr));
4042 ac--; av++;
4043 break;
4044 }
4045 case TOK_COMMENT:
4046 /* pretend it is a 'count' rule followed by the comment */
4047 action->opcode = O_COUNT;
4048 ac++; av--; /* go back... */
4049 break;
4050
4051 default:
4052 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
4053 }
4054 action = next_cmd(action);
4055
4056 /*
4057 * [altq queuename] -- altq tag, optional
4058 * [log [logamount N]] -- log, optional
4059 *
4060 * If they exist, it go first in the cmdbuf, but then it is
4061 * skipped in the copy section to the end of the buffer.
4062 */
4063 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
4064 ac--; av++;
4065 switch (i) {
4066 case TOK_LOG:
4067 {
4068 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4069 int l;
4070
4071 if (have_log)
4072 errx(EX_DATAERR,
4073 "log cannot be specified more than once");
4074 have_log = (ipfw_insn *)c;
4075 cmd->len = F_INSN_SIZE(ipfw_insn_log);
4076 cmd->opcode = O_LOG;
4077 if (ac && _substrcmp(*av, "logamount") == 0) {
4078 ac--; av++;
4079 NEED1("logamount requires argument");
4080 l = atoi(*av);
4081 if (l < 0)
4082 errx(EX_DATAERR,
4083 "logamount must be positive");
4084 c->max_log = l;
4085 ac--; av++;
4086 } else {
4087 len = sizeof(c->max_log);
4088 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4089 &c->max_log, &len, NULL, 0) == -1)
4090 errx(1, "sysctlbyname(\"%s\")",
4091 "net.inet.ip.fw.verbose_limit");
4092 }
4093 }
4094 break;
4095
4096 case TOK_ALTQ:
4097 {
4098 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4099
4100 NEED1("missing altq queue name");
4101 if (have_altq)
4102 errx(EX_DATAERR,
4103 "altq cannot be specified more than once");
4104 have_altq = (ipfw_insn *)a;
4105 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4106 cmd->opcode = O_ALTQ;
4107 fill_altq_qid(&a->qid, *av);
4108 ac--; av++;
4109 }
4110 break;
4111
4112 case TOK_TAG:
4113 case TOK_UNTAG: {
4114 uint16_t tag;
4115
4116 if (have_tag)
4117 errx(EX_USAGE, "tag and untag cannot be "
4118 "specified more than once");
4119 GET_UINT_ARG(tag, 1, 65534, i, rule_action_params);
4120 have_tag = cmd;
4121 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4122 ac--; av++;
4123 break;
4124 }
4125
4126 default:
4127 abort();
4128 }
4129 cmd = next_cmd(cmd);
4130 }
4131
4132 if (have_state) /* must be a check-state, we are done */
4133 goto done;
4134
4135#define OR_START(target) \
4136 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
4137 if (open_par) \
4138 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4139 prev = NULL; \
4140 open_par = 1; \
4141 if ( (av[0])[1] == '\0') { \
4142 ac--; av++; \
4143 } else \
4144 (*av)++; \
4145 } \
4146 target: \
4147
4148
4149#define CLOSE_PAR \
4150 if (open_par) { \
4151 if (ac && ( \
4152 strcmp(*av, ")") == 0 || \
4153 strcmp(*av, "}") == 0)) { \
4154 prev = NULL; \
4155 open_par = 0; \
4156 ac--; av++; \
4157 } else \
4158 errx(EX_USAGE, "missing \")\"\n"); \
4159 }
4160
4161#define NOT_BLOCK \
4162 if (ac && _substrcmp(*av, "not") == 0) { \
4163 if (cmd->len & F_NOT) \
4164 errx(EX_USAGE, "double \"not\" not allowed\n"); \
4165 cmd->len |= F_NOT; \
4166 ac--; av++; \
4167 }
4168
4169#define OR_BLOCK(target) \
4170 if (ac && _substrcmp(*av, "or") == 0) { \
4171 if (prev == NULL || open_par == 0) \
4172 errx(EX_DATAERR, "invalid OR block"); \
4173 prev->len |= F_OR; \
4174 ac--; av++; \
4175 goto target; \
4176 } \
4177 CLOSE_PAR;
4178
4179 first_cmd = cmd;
4180
4181#if 0
4182 /*
4183 * MAC addresses, optional.
4184 * If we have this, we skip the part "proto from src to dst"
4185 * and jump straight to the option parsing.
4186 */
4187 NOT_BLOCK;
4188 NEED1("missing protocol");
4189 if (_substrcmp(*av, "MAC") == 0 ||
4190 _substrcmp(*av, "mac") == 0) {
4191 ac--; av++; /* the "MAC" keyword */
4192 add_mac(cmd, ac, av); /* exits in case of errors */
4193 cmd = next_cmd(cmd);
4194 ac -= 2; av += 2; /* dst-mac and src-mac */
4195 NOT_BLOCK;
4196 NEED1("missing mac type");
4197 if (add_mactype(cmd, ac, av[0]))
4198 cmd = next_cmd(cmd);
4199 ac--; av++; /* any or mac-type */
4200 goto read_options;
4201 }
4202#endif
4203
4204 /*
4205 * protocol, mandatory
4206 */
4207 OR_START(get_proto);
4208 NOT_BLOCK;
4209 NEED1("missing protocol");
4210 if (add_proto_compat(cmd, *av, &proto)) {
4211 av++; ac--;
4212 if (F_LEN(cmd) != 0) {
4213 prev = cmd;
4214 cmd = next_cmd(cmd);
4215 }
4216 } else if (first_cmd != cmd) {
4217 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4218 } else
4219 goto read_options;
4220 OR_BLOCK(get_proto);
4221
4222 /*
4223 * "from", mandatory
4224 */
4225 if (!ac || _substrcmp(*av, "from") != 0)
4226 errx(EX_USAGE, "missing ``from''");
4227 ac--; av++;
4228
4229 /*
4230 * source IP, mandatory
4231 */
4232 OR_START(source_ip);
4233 NOT_BLOCK; /* optional "not" */
4234 NEED1("missing source address");
4235 if (add_src(cmd, *av, proto)) {
4236 ac--; av++;
4237 if (F_LEN(cmd) != 0) { /* ! any */
4238 prev = cmd;
4239 cmd = next_cmd(cmd);
4240 }
4241 } else
4242 errx(EX_USAGE, "bad source address %s", *av);
4243 OR_BLOCK(source_ip);
4244
4245 /*
4246 * source ports, optional
4247 */
4248 NOT_BLOCK; /* optional "not" */
4249 if (ac) {
4250 if (_substrcmp(*av, "any") == 0 ||
4251 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
4252 ac--; av++;
4253 if (F_LEN(cmd) != 0)
4254 cmd = next_cmd(cmd);
4255 }
4256 }
4257
4258 /*
4259 * "to", mandatory
4260 */
4261 if (!ac || _substrcmp(*av, "to") != 0)
4262 errx(EX_USAGE, "missing ``to''");
4263 av++; ac--;
4264
4265 /*
4266 * destination, mandatory
4267 */
4268 OR_START(dest_ip);
4269 NOT_BLOCK; /* optional "not" */
4270 NEED1("missing dst address");
4271 if (add_dst(cmd, *av, proto)) {
4272 ac--; av++;
4273 if (F_LEN(cmd) != 0) { /* ! any */
4274 prev = cmd;
4275 cmd = next_cmd(cmd);
4276 }
4277 } else
4278 errx( EX_USAGE, "bad destination address %s", *av);
4279 OR_BLOCK(dest_ip);
4280
4281 /*
4282 * dest. ports, optional
4283 */
4284 NOT_BLOCK; /* optional "not" */
4285 if (ac) {
4286 if (_substrcmp(*av, "any") == 0 ||
4287 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
4288 ac--; av++;
4289 if (F_LEN(cmd) != 0)
4290 cmd = next_cmd(cmd);
4291 }
4292 }
4293
4294read_options:
4295 if (ac && first_cmd == cmd) {
4296 /*
4297 * nothing specified so far, store in the rule to ease
4298 * printout later.
4299 */
4300 rule->_pad = 1;
4301 }
4302 prev = NULL;
4303 while (ac) {
4304 char *s;
4305 ipfw_insn_u32 *cmd32; /* alias for cmd */
4306
4307 s = *av;
4308 cmd32 = (ipfw_insn_u32 *)cmd;
4309
4310 if (*s == '!') { /* alternate syntax for NOT */
4311 if (cmd->len & F_NOT)
4312 errx(EX_USAGE, "double \"not\" not allowed\n");
4313 cmd->len = F_NOT;
4314 s++;
4315 }
4316 i = match_token(rule_options, s);
4317 ac--; av++;
4318 switch(i) {
4319 case TOK_NOT:
4320 if (cmd->len & F_NOT)
4321 errx(EX_USAGE, "double \"not\" not allowed\n");
4322 cmd->len = F_NOT;
4323 break;
4324
4325 case TOK_OR:
4326 if (open_par == 0 || prev == NULL)
4327 errx(EX_USAGE, "invalid \"or\" block\n");
4328 prev->len |= F_OR;
4329 break;
4330
4331 case TOK_STARTBRACE:
4332 if (open_par)
4333 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4334 open_par = 1;
4335 break;
4336
4337 case TOK_ENDBRACE:
4338 if (!open_par)
4339 errx(EX_USAGE, "+missing \")\"\n");
4340 open_par = 0;
4341 prev = NULL;
4342 break;
4343
4344 case TOK_IN:
4345 fill_cmd(cmd, O_IN, 0, 0);
4346 break;
4347
4348 case TOK_OUT:
4349 cmd->len ^= F_NOT; /* toggle F_NOT */
4350 fill_cmd(cmd, O_IN, 0, 0);
4351 break;
4352
4353 case TOK_DIVERTED:
4354 fill_cmd(cmd, O_DIVERTED, 0, 3);
4355 break;
4356
4357 case TOK_DIVERTEDLOOPBACK:
4358 fill_cmd(cmd, O_DIVERTED, 0, 1);
4359 break;
4360
4361 case TOK_DIVERTEDOUTPUT:
4362 fill_cmd(cmd, O_DIVERTED, 0, 2);
4363 break;
4364
4365 case TOK_FRAG:
4366 fill_cmd(cmd, O_FRAG, 0, 0);
4367 break;
4368
4369 case TOK_LAYER2:
4370 fill_cmd(cmd, O_LAYER2, 0, 0);
4371 break;
4372
4373 case TOK_XMIT:
4374 case TOK_RECV:
4375 case TOK_VIA:
4376 NEED1("recv, xmit, via require interface name"
4377 " or address");
4378 fill_iface((ipfw_insn_if *)cmd, av[0]);
4379 ac--; av++;
4380 if (F_LEN(cmd) == 0) /* not a valid address */
4381 break;
4382 if (i == TOK_XMIT)
4383 cmd->opcode = O_XMIT;
4384 else if (i == TOK_RECV)
4385 cmd->opcode = O_RECV;
4386 else if (i == TOK_VIA)
4387 cmd->opcode = O_VIA;
4388 break;
4389
4390 case TOK_ICMPTYPES:
4391 NEED1("icmptypes requires list of types");
4392 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4393 av++; ac--;
4394 break;
4395
4396 case TOK_ICMP6TYPES:
4397 NEED1("icmptypes requires list of types");
4398 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
4399 av++; ac--;
4400 break;
4401
4402 case TOK_IPTTL:
4403 NEED1("ipttl requires TTL");
4404 if (strpbrk(*av, "-,")) {
4405 if (!add_ports(cmd, *av, 0, O_IPTTL))
4406 errx(EX_DATAERR, "invalid ipttl %s", *av);
4407 } else
4408 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4409 ac--; av++;
4410 break;
4411
4412 case TOK_IPID:
4413 NEED1("ipid requires id");
4414 if (strpbrk(*av, "-,")) {
4415 if (!add_ports(cmd, *av, 0, O_IPID))
4416 errx(EX_DATAERR, "invalid ipid %s", *av);
4417 } else
4418 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4419 ac--; av++;
4420 break;
4421
4422 case TOK_IPLEN:
4423 NEED1("iplen requires length");
4424 if (strpbrk(*av, "-,")) {
4425 if (!add_ports(cmd, *av, 0, O_IPLEN))
4426 errx(EX_DATAERR, "invalid ip len %s", *av);
4427 } else
4428 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4429 ac--; av++;
4430 break;
4431
4432 case TOK_IPVER:
4433 NEED1("ipver requires version");
4434 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4435 ac--; av++;
4436 break;
4437
4438 case TOK_IPPRECEDENCE:
4439 NEED1("ipprecedence requires value");
4440 fill_cmd(cmd, O_IPPRECEDENCE, 0,
4441 (strtoul(*av, NULL, 0) & 7) << 5);
4442 ac--; av++;
4443 break;
4444
4445 case TOK_IPOPTS:
4446 NEED1("missing argument for ipoptions");
4447 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
4448 ac--; av++;
4449 break;
4450
4451 case TOK_IPTOS:
4452 NEED1("missing argument for iptos");
4453 fill_flags(cmd, O_IPTOS, f_iptos, *av);
4454 ac--; av++;
4455 break;
4456
4457 case TOK_UID:
4458 NEED1("uid requires argument");
4459 {
4460 char *end;
4461 uid_t uid;
4462 struct passwd *pwd;
4463
4464 cmd->opcode = O_UID;
4465 uid = strtoul(*av, &end, 0);
4466 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4467 if (pwd == NULL)
4468 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4469 cmd32->d[0] = pwd->pw_uid;
4470 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4471 ac--; av++;
4472 }
4473 break;
4474
4475 case TOK_GID:
4476 NEED1("gid requires argument");
4477 {
4478 char *end;
4479 gid_t gid;
4480 struct group *grp;
4481
4482 cmd->opcode = O_GID;
4483 gid = strtoul(*av, &end, 0);
4484 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4485 if (grp == NULL)
4486 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4487 cmd32->d[0] = grp->gr_gid;
4488 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4489 ac--; av++;
4490 }
4491 break;
4492
4493 case TOK_JAIL:
4494 NEED1("jail requires argument");
4495 {
4496 char *end;
4497 int jid;
4498
4499 cmd->opcode = O_JAIL;
4500 jid = (int)strtol(*av, &end, 0);
4501 if (jid < 0 || *end != '\0')
4502 errx(EX_DATAERR, "jail requires prison ID");
4503 cmd32->d[0] = (uint32_t)jid;
4504 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4505 ac--; av++;
4506 }
4507 break;
4508
4509 case TOK_ESTAB:
4510 fill_cmd(cmd, O_ESTAB, 0, 0);
4511 break;
4512
4513 case TOK_SETUP:
4514 fill_cmd(cmd, O_TCPFLAGS, 0,
4515 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4516 break;
4517
4518 case TOK_TCPDATALEN:
4519 NEED1("tcpdatalen requires length");
4520 if (strpbrk(*av, "-,")) {
4521 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
4522 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4523 } else
4524 fill_cmd(cmd, O_TCPDATALEN, 0,
4525 strtoul(*av, NULL, 0));
4526 ac--; av++;
4527 break;
4528
4529 case TOK_TCPOPTS:
4530 NEED1("missing argument for tcpoptions");
4531 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
4532 ac--; av++;
4533 break;
4534
4535 case TOK_TCPSEQ:
4536 case TOK_TCPACK:
4537 NEED1("tcpseq/tcpack requires argument");
4538 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4539 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4540 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4541 ac--; av++;
4542 break;
4543
4544 case TOK_TCPWIN:
4545 NEED1("tcpwin requires length");
4546 fill_cmd(cmd, O_TCPWIN, 0,
4547 htons(strtoul(*av, NULL, 0)));
4548 ac--; av++;
4549 break;
4550
4551 case TOK_TCPFLAGS:
4552 NEED1("missing argument for tcpflags");
4553 cmd->opcode = O_TCPFLAGS;
4554 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
4555 ac--; av++;
4556 break;
4557
4558 case TOK_KEEPSTATE:
4559 if (open_par)
4560 errx(EX_USAGE, "keep-state cannot be part "
4561 "of an or block");
4562 if (have_state)
4563 errx(EX_USAGE, "only one of keep-state "
4564 "and limit is allowed");
4565 have_state = cmd;
4566 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
4567 break;
4568
4569 case TOK_LIMIT: {
4570 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4571 int val;
4572
4573 if (open_par)
4574 errx(EX_USAGE,
4575 "limit cannot be part of an or block");
4576 if (have_state)
4577 errx(EX_USAGE, "only one of keep-state and"
4578 "limit is allowed");
4579 have_state = cmd;
4580
4581 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4582 cmd->opcode = O_LIMIT;
4583 c->limit_mask = c->conn_limit = 0;
4584
4585 while (ac > 0) {
4586 if ((val = match_token(limit_masks, *av)) <= 0)
4587 break;
4588 c->limit_mask |= val;
4589 ac--; av++;
4590 }
4591
4592 if (c->limit_mask == 0)
4593 errx(EX_USAGE, "limit: missing limit mask");
4594
4595 GET_UINT_ARG(c->conn_limit, 1, 65534, TOK_LIMIT,
4596 rule_options);
4597
4598 ac--; av++;
4599 break;
4600 }
4601
4602 case TOK_PROTO:
4603 NEED1("missing protocol");
4604 if (add_proto(cmd, *av, &proto)) {
4605 ac--; av++;
4606 } else
4607 errx(EX_DATAERR, "invalid protocol ``%s''",
4608 *av);
4609 break;
4610
4611 case TOK_SRCIP:
4612 NEED1("missing source IP");
4613 if (add_srcip(cmd, *av)) {
4614 ac--; av++;
4615 }
4616 break;
4617
4618 case TOK_DSTIP:
4619 NEED1("missing destination IP");
4620 if (add_dstip(cmd, *av)) {
4621 ac--; av++;
4622 }
4623 break;
4624
4625 case TOK_SRCIP6:
4626 NEED1("missing source IP6");
4627 if (add_srcip6(cmd, *av)) {
4628 ac--; av++;
4629 }
4630 break;
4631
4632 case TOK_DSTIP6:
4633 NEED1("missing destination IP6");
4634 if (add_dstip6(cmd, *av)) {
4635 ac--; av++;
4636 }
4637 break;
4638
4639 case TOK_SRCPORT:
4640 NEED1("missing source port");
4641 if (_substrcmp(*av, "any") == 0 ||
4642 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
4643 ac--; av++;
4644 } else
4645 errx(EX_DATAERR, "invalid source port %s", *av);
4646 break;
4647
4648 case TOK_DSTPORT:
4649 NEED1("missing destination port");
4650 if (_substrcmp(*av, "any") == 0 ||
4651 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
4652 ac--; av++;
4653 } else
4654 errx(EX_DATAERR, "invalid destination port %s",
4655 *av);
4656 break;
4657
4658 case TOK_MAC:
4659 if (add_mac(cmd, ac, av)) {
4660 ac -= 2; av += 2;
4661 }
4662 break;
4663
4664 case TOK_MACTYPE:
4665 NEED1("missing mac type");
4666 if (!add_mactype(cmd, ac, *av))
4667 errx(EX_DATAERR, "invalid mac type %s", *av);
4668 ac--; av++;
4669 break;
4670
4671 case TOK_VERREVPATH:
4672 fill_cmd(cmd, O_VERREVPATH, 0, 0);
4673 break;
4674
4675 case TOK_VERSRCREACH:
4676 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4677 break;
4678
4679 case TOK_ANTISPOOF:
4680 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4681 break;
4682
4683 case TOK_IPSEC:
4684 fill_cmd(cmd, O_IPSEC, 0, 0);
4685 break;
4686
4687 case TOK_IPV6:
4688 fill_cmd(cmd, O_IP6, 0, 0);
4689 break;
4690
4691 case TOK_IPV4:
4692 fill_cmd(cmd, O_IP4, 0, 0);
4693 break;
4694
4695 case TOK_EXT6HDR:
4696 fill_ext6hdr( cmd, *av );
4697 ac--; av++;
4698 break;
4699
4700 case TOK_FLOWID:
4701 if (proto != IPPROTO_IPV6 )
4702 errx( EX_USAGE, "flow-id filter is active "
4703 "only for ipv6 protocol\n");
4704 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
4705 ac--; av++;
4706 break;
4707
4708 case TOK_COMMENT:
4709 fill_comment(cmd, ac, av);
4710 av += ac;
4711 ac = 0;
4712 break;
4713
4714 case TOK_TAGGED:
4715 if (ac > 0 && strpbrk(*av, "-,")) {
4716 if (!add_ports(cmd, *av, 0, O_TAGGED))
4717 errx(EX_DATAERR, "tagged: invalid tag"
4718 " list: %s", *av);
4719 }
4720 else {
4721 uint16_t tag;
4722
4723 GET_UINT_ARG(tag, 1, 65534, TOK_TAGGED,
4724 rule_options);
4725 fill_cmd(cmd, O_TAGGED, 0, tag);
4726 }
4727 ac--; av++;
4728 break;
4729
4730 default:
4731 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4732 }
4733 if (F_LEN(cmd) > 0) { /* prepare to advance */
4734 prev = cmd;
4735 cmd = next_cmd(cmd);
4736 }
4737 }
4738
4739done:
4740 /*
4741 * Now copy stuff into the rule.
4742 * If we have a keep-state option, the first instruction
4743 * must be a PROBE_STATE (which is generated here).
4744 * If we have a LOG option, it was stored as the first command,
4745 * and now must be moved to the top of the action part.
4746 */
4747 dst = (ipfw_insn *)rule->cmd;
4748
4749 /*
4750 * First thing to write into the command stream is the match probability.
4751 */
4752 if (match_prob != 1) { /* 1 means always match */
4753 dst->opcode = O_PROB;
4754 dst->len = 2;
4755 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4756 dst += dst->len;
4757 }
4758
4759 /*
4760 * generate O_PROBE_STATE if necessary
4761 */
4762 if (have_state && have_state->opcode != O_CHECK_STATE) {
4763 fill_cmd(dst, O_PROBE_STATE, 0, 0);
4764 dst = next_cmd(dst);
4765 }
4766
4767 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4768 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4769 i = F_LEN(src);
4770
4771 switch (src->opcode) {
4772 case O_LOG:
4773 case O_KEEP_STATE:
4774 case O_LIMIT:
4775 case O_ALTQ:
4776 case O_TAG:
4777 break;
4778 default:
4779 bcopy(src, dst, i * sizeof(uint32_t));
4780 dst += i;
4781 }
4782 }
4783
4784 /*
4785 * put back the have_state command as last opcode
4786 */
4787 if (have_state && have_state->opcode != O_CHECK_STATE) {
4788 i = F_LEN(have_state);
4789 bcopy(have_state, dst, i * sizeof(uint32_t));
4790 dst += i;
4791 }
4792 /*
4793 * start action section
4794 */
4795 rule->act_ofs = dst - rule->cmd;
4796
4797 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4798 if (have_log) {
4799 i = F_LEN(have_log);
4800 bcopy(have_log, dst, i * sizeof(uint32_t));
4801 dst += i;
4802 }
4803 if (have_altq) {
4804 i = F_LEN(have_altq);
4805 bcopy(have_altq, dst, i * sizeof(uint32_t));
4806 dst += i;
4807 }
4808 if (have_tag) {
4809 i = F_LEN(have_tag);
4810 bcopy(have_tag, dst, i * sizeof(uint32_t));
4811 dst += i;
4812 }
4813 /*
4814 * copy all other actions
4815 */
4816 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4817 i = F_LEN(src);
4818 bcopy(src, dst, i * sizeof(uint32_t));
4819 dst += i;
4820 }
4821
4822 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4823 i = (char *)dst - (char *)rule;
4824 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
4825 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
4826 if (!do_quiet)
4827 show_ipfw(rule, 0, 0);
4828}
4829
4830static void
4831zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */)
4832{
4833 int rulenum;
4834 int failed = EX_OK;
4835 char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG";
4836
4837 av++; ac--;
4838
4839 if (!ac) {
4840 /* clear all entries */
4841 if (do_cmd(optname, NULL, 0) < 0)
4842 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
4843 if (!do_quiet)
4844 printf("%s.\n", optname == IP_FW_ZERO ?
4845 "Accounting cleared":"Logging counts reset");
4846
4847 return;
4848 }
4849
4850 while (ac) {
4851 /* Rule number */
4852 if (isdigit(**av)) {
4853 rulenum = atoi(*av);
4854 av++;
4855 ac--;
4856 if (do_cmd(optname, &rulenum, sizeof rulenum)) {
4857 warn("rule %u: setsockopt(IP_FW_%s)",
4858 rulenum, name);
4859 failed = EX_UNAVAILABLE;
4860 } else if (!do_quiet)
4861 printf("Entry %d %s.\n", rulenum,
4862 optname == IP_FW_ZERO ?
4863 "cleared" : "logging count reset");
4864 } else {
4865 errx(EX_USAGE, "invalid rule number ``%s''", *av);
4866 }
4867 }
4868 if (failed != EX_OK)
4869 exit(failed);
4870}
4871
4872static void
4873flush(int force)
4874{
4875 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
4876
4877 if (!force && !do_quiet) { /* need to ask user */
4878 int c;
4879
4880 printf("Are you sure? [yn] ");
4881 fflush(stdout);
4882 do {
4883 c = toupper(getc(stdin));
4884 while (c != '\n' && getc(stdin) != '\n')
4885 if (feof(stdin))
4886 return; /* and do not flush */
4887 } while (c != 'Y' && c != 'N');
4888 printf("\n");
4889 if (c == 'N') /* user said no */
4890 return;
4891 }
4892 if (do_cmd(cmd, NULL, 0) < 0)
4893 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
4894 do_pipe ? "DUMMYNET" : "FW");
4895 if (!do_quiet)
4896 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
4897}
4898
4899/*
4900 * Free a the (locally allocated) copy of command line arguments.
4901 */
4902static void
4903free_args(int ac, char **av)
4904{
4905 int i;
4906
4907 for (i=0; i < ac; i++)
4908 free(av[i]);
4909 free(av);
4910}
4911
4912/*
4913 * This one handles all table-related commands
4914 * ipfw table N add addr[/masklen] [value]
4915 * ipfw table N delete addr[/masklen]
4916 * ipfw table N flush
4917 * ipfw table N list
4918 */
4919static void
4920table_handler(int ac, char *av[])
4921{
4922 ipfw_table_entry ent;
4923 ipfw_table *tbl;
4924 int do_add;
4925 char *p;
4926 socklen_t l;
4927 uint32_t a;
4928
4929 ac--; av++;
4930 if (ac && isdigit(**av)) {
4931 ent.tbl = atoi(*av);
4932 ac--; av++;
4933 } else
4934 errx(EX_USAGE, "table number required");
4935 NEED1("table needs command");
4936 if (_substrcmp(*av, "add") == 0 ||
4937 _substrcmp(*av, "delete") == 0) {
4938 do_add = **av == 'a';
4939 ac--; av++;
4940 if (!ac)
4941 errx(EX_USAGE, "IP address required");
4942 p = strchr(*av, '/');
4943 if (p) {
4944 *p++ = '\0';
4945 ent.masklen = atoi(p);
4946 if (ent.masklen > 32)
4947 errx(EX_DATAERR, "bad width ``%s''", p);
4948 } else
4949 ent.masklen = 32;
4950 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
4951 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4952 ac--; av++;
4953 if (do_add && ac) {
4954 unsigned int tval;
4955 /* isdigit is a bit of a hack here.. */
4956 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
4957 ent.value = strtoul(*av, NULL, 0);
4958 } else {
4959 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
4960 /* The value must be stored in host order *
4961 * so that the values < 65k can be distinguished */
4962 ent.value = ntohl(tval);
4963 } else {
4964 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4965 }
4966 }
4967 } else
4968 ent.value = 0;
4969 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
4970 &ent, sizeof(ent)) < 0) {
4971 /* If running silent, don't bomb out on these errors. */
4972 if (!(do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
4973 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
4974 do_add ? "ADD" : "DEL");
4975 /* In silent mode, react to a failed add by deleting */
4976 if (do_add) {
4977 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
4978 if (do_cmd(IP_FW_TABLE_ADD,
4979 &ent, sizeof(ent)) < 0)
4980 err(EX_OSERR,
4981 "setsockopt(IP_FW_TABLE_ADD)");
4982 }
4983 }
4984 } else if (_substrcmp(*av, "flush") == 0) {
4985 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0)
4986 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
4987 } else if (_substrcmp(*av, "list") == 0) {
4988 a = ent.tbl;
4989 l = sizeof(a);
4990 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
4991 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
4992 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
4993 tbl = malloc(l);
4994 if (tbl == NULL)
4995 err(EX_OSERR, "malloc");
4996 tbl->tbl = ent.tbl;
4997 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
4998 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
4999 for (a = 0; a < tbl->cnt; a++) {
5000 /* Heuristic to print it the right way */
5001 /* values < 64k are printed as numbers */
5002 unsigned int tval;
5003 tval = tbl->ent[a].value;
5004 if (tval > 0xffff) {
5005 char tbuf[128];
5006 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
5007 &tbl->ent[a].addr), 127);
5008 /* inet_ntoa expects host order */
5009 tval = htonl(tval);
5010 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
5011 inet_ntoa(*(struct in_addr *)&tval));
5012 } else {
5013 printf("%s/%u %u\n",
5014 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
5015 tbl->ent[a].masklen, tbl->ent[a].value);
5016 }
5017 }
5018 } else
5019 errx(EX_USAGE, "invalid table command %s", *av);
5020}
5021
5022/*
5023 * Called with the arguments (excluding program name).
5024 * Returns 0 if successful, 1 if empty command, errx() in case of errors.
5025 */
5026static int
5027ipfw_main(int oldac, char **oldav)
5028{
5029 int ch, ac, save_ac;
5030 char **av, **save_av;
5031 int do_acct = 0; /* Show packet/byte count */
5032
5033#define WHITESP " \t\f\v\n\r"
5034 if (oldac == 0)
5035 return 1;
5036 else if (oldac == 1) {
5037 /*
5038 * If we are called with a single string, try to split it into
5039 * arguments for subsequent parsing.
5040 * But first, remove spaces after a ',', by copying the string
5041 * in-place.
5042 */
5043 char *arg = oldav[0]; /* The string... */
5044 int l = strlen(arg);
5045 int copy = 0; /* 1 if we need to copy, 0 otherwise */
5046 int i, j;
5047 for (i = j = 0; i < l; i++) {
5048 if (arg[i] == '#') /* comment marker */
5049 break;
5050 if (copy) {
5051 arg[j++] = arg[i];
5052 copy = !index("," WHITESP, arg[i]);
5053 } else {
5054 copy = !index(WHITESP, arg[i]);
5055 if (copy)
5056 arg[j++] = arg[i];
5057 }
5058 }
5059 if (!copy && j > 0) /* last char was a 'blank', remove it */
5060 j--;
5061 l = j; /* the new argument length */
5062 arg[j++] = '\0';
5063 if (l == 0) /* empty string! */
5064 return 1;
5065
5066 /*
5067 * First, count number of arguments. Because of the previous
5068 * processing, this is just the number of blanks plus 1.
5069 */
5070 for (i = 0, ac = 1; i < l; i++)
5071 if (index(WHITESP, arg[i]) != NULL)
5072 ac++;
5073
5074 av = calloc(ac, sizeof(char *));
5075
5076 /*
5077 * Second, copy arguments from cmd[] to av[]. For each one,
5078 * j is the initial character, i is the one past the end.
5079 */
5080 for (ac = 0, i = j = 0; i < l; i++)
5081 if (index(WHITESP, arg[i]) != NULL || i == l-1) {
5082 if (i == l-1)
5083 i++;
5084 av[ac] = calloc(i-j+1, 1);
5085 bcopy(arg+j, av[ac], i-j);
5086 ac++;
5087 j = i + 1;
5088 }
5089 } else {
5090 /*
5091 * If an argument ends with ',' join with the next one.
5092 */
5093 int first, i, l;
5094
5095 av = calloc(oldac, sizeof(char *));
5096 for (first = i = ac = 0, l = 0; i < oldac; i++) {
5097 char *arg = oldav[i];
5098 int k = strlen(arg);
5099
5100 l += k;
5101 if (arg[k-1] != ',' || i == oldac-1) {
5102 /* Time to copy. */
5103 av[ac] = calloc(l+1, 1);
5104 for (l=0; first <= i; first++) {
5105 strcat(av[ac]+l, oldav[first]);
5106 l += strlen(oldav[first]);
5107 }
5108 ac++;
5109 l = 0;
5110 first = i+1;
5111 }
5112 }
5113 }
5114
5115 /* Set the force flag for non-interactive processes */
5116 if (!do_force)
5117 do_force = !isatty(STDIN_FILENO);
5118
5119 /* Save arguments for final freeing of memory. */
5120 save_ac = ac;
5121 save_av = av;
5122
5123 optind = optreset = 0;
5124 while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1)
5125 switch (ch) {
5126 case 'a':
5127 do_acct = 1;
5128 break;
5129
5130 case 'b':
5131 comment_only = 1;
5132 do_compact = 1;
5133 break;
5134
5135 case 'c':
5136 do_compact = 1;
5137 break;
5138
5139 case 'd':
5140 do_dynamic = 1;
5141 break;
5142
5143 case 'e':
5144 do_expired = 1;
5145 break;
5146
5147 case 'f':
5148 do_force = 1;
5149 break;
5150
5151 case 'h': /* help */
5152 free_args(save_ac, save_av);
5153 help();
5154 break; /* NOTREACHED */
5155
5156 case 'n':
5157 test_only = 1;
5158 break;
5159
5160 case 'N':
5161 do_resolv = 1;
5162 break;
5163
5164 case 'q':
5165 do_quiet = 1;
5166 break;
5167
5168 case 's': /* sort */
5169 do_sort = atoi(optarg);
5170 break;
5171
5172 case 'S':
5173 show_sets = 1;
5174 break;
5175
5176 case 't':
5177 do_time = 1;
5178 break;
5179
5180 case 'T':
5181 do_time = 2; /* numeric timestamp */
5182 break;
5183
5184 case 'v': /* verbose */
5185 verbose = 1;
5186 break;
5187
5188 default:
5189 free_args(save_ac, save_av);
5190 return 1;
5191 }
5192
5193 ac -= optind;
5194 av += optind;
5195 NEED1("bad arguments, for usage summary ``ipfw''");
5196
5197 /*
5198 * An undocumented behaviour of ipfw1 was to allow rule numbers first,
5199 * e.g. "100 add allow ..." instead of "add 100 allow ...".
5200 * In case, swap first and second argument to get the normal form.
5201 */
5202 if (ac > 1 && isdigit(*av[0])) {
5203 char *p = av[0];
5204
5205 av[0] = av[1];
5206 av[1] = p;
5207 }
5208
5209 /*
5210 * optional: pipe or queue
5211 */
5212 do_pipe = 0;
5213 if (_substrcmp(*av, "pipe") == 0)
5214 do_pipe = 1;
5215 else if (_substrcmp(*av, "queue") == 0)
5216 do_pipe = 2;
5217 if (do_pipe) {
5218 ac--;
5219 av++;
5220 }
5221 NEED1("missing command");
5222
5223 /*
5224 * For pipes and queues we normally say 'pipe NN config'
5225 * but the code is easier to parse as 'pipe config NN'
5226 * so we swap the two arguments.
5227 */
5228 if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) {
5229 char *p = av[0];
5230
5231 av[0] = av[1];
5232 av[1] = p;
5233 }
5234
5235 if (_substrcmp(*av, "add") == 0)
5236 add(ac, av);
5237 else if (do_pipe && _substrcmp(*av, "config") == 0)
5238 config_pipe(ac, av);
5239 else if (_substrcmp(*av, "delete") == 0)
5240 delete(ac, av);
5241 else if (_substrcmp(*av, "flush") == 0)
5242 flush(do_force);
5243 else if (_substrcmp(*av, "zero") == 0)
5244 zero(ac, av, IP_FW_ZERO);
5245 else if (_substrcmp(*av, "resetlog") == 0)
5246 zero(ac, av, IP_FW_RESETLOG);
5247 else if (_substrcmp(*av, "print") == 0 ||
5248 _substrcmp(*av, "list") == 0)
5249 list(ac, av, do_acct);
5250 else if (_substrcmp(*av, "set") == 0)
5251 sets_handler(ac, av);
5252 else if (_substrcmp(*av, "table") == 0)
5253 table_handler(ac, av);
5254 else if (_substrcmp(*av, "enable") == 0)
5255 sysctl_handler(ac, av, 1);
5256 else if (_substrcmp(*av, "disable") == 0)
5257 sysctl_handler(ac, av, 0);
5258 else if (_substrcmp(*av, "show") == 0)
5259 list(ac, av, 1 /* show counters */);
5260 else
5261 errx(EX_USAGE, "bad command `%s'", *av);
5262
5263 /* Free memory allocated in the argument parsing. */
5264 free_args(save_ac, save_av);
5265 return 0;
5266}
5267
5268
5269static void
5270ipfw_readfile(int ac, char *av[])
5271{
5272#define MAX_ARGS 32
5273 char buf[BUFSIZ];
5274 char *cmd = NULL, *filename = av[ac-1];
5275 int c, lineno=0;
5276 FILE *f = NULL;
5277 pid_t preproc = 0;
5278
5279 filename = av[ac-1];
5280
5281 while ((c = getopt(ac, av, "cfNnp:qS")) != -1) {
5282 switch(c) {
5283 case 'c':
5284 do_compact = 1;
5285 break;
5286
5287 case 'f':
5288 do_force = 1;
5289 break;
5290
5291 case 'N':
5292 do_resolv = 1;
5293 break;
5294
5295 case 'n':
5296 test_only = 1;
5297 break;
5298
5299 case 'p':
5300 cmd = optarg;
5301 /*
5302 * Skip previous args and delete last one, so we
5303 * pass all but the last argument to the preprocessor
5304 * via av[optind-1]
5305 */
5306 av += optind - 1;
5307 ac -= optind - 1;
5308 av[ac-1] = NULL;
5309 fprintf(stderr, "command is %s\n", av[0]);
5310 break;
5311
5312 case 'q':
5313 do_quiet = 1;
5314 break;
5315
5316 case 'S':
5317 show_sets = 1;
5318 break;
5319
5320 default:
5321 errx(EX_USAGE, "bad arguments, for usage"
5322 " summary ``ipfw''");
5323 }
5324
5325 if (cmd != NULL)
5326 break;
5327 }
5328
5329 if (cmd == NULL && ac != optind + 1) {
5330 fprintf(stderr, "ac %d, optind %d\n", ac, optind);
5331 errx(EX_USAGE, "extraneous filename arguments");
5332 }
5333
5334 if ((f = fopen(filename, "r")) == NULL)
5335 err(EX_UNAVAILABLE, "fopen: %s", filename);
5336
5337 if (cmd != NULL) { /* pipe through preprocessor */
5338 int pipedes[2];
5339
5340 if (pipe(pipedes) == -1)
5341 err(EX_OSERR, "cannot create pipe");
5342
5343 preproc = fork();
5344 if (preproc == -1)
5345 err(EX_OSERR, "cannot fork");
5346
5347 if (preproc == 0) {
5348 /*
5349 * Child, will run the preprocessor with the
5350 * file on stdin and the pipe on stdout.
5351 */
5352 if (dup2(fileno(f), 0) == -1
5353 || dup2(pipedes[1], 1) == -1)
5354 err(EX_OSERR, "dup2()");
5355 fclose(f);
5356 close(pipedes[1]);
5357 close(pipedes[0]);
5358 execvp(cmd, av);
5359 err(EX_OSERR, "execvp(%s) failed", cmd);
5360 } else { /* parent, will reopen f as the pipe */
5361 fclose(f);
5362 close(pipedes[1]);
5363 if ((f = fdopen(pipedes[0], "r")) == NULL) {
5364 int savederrno = errno;
5365
5366 (void)kill(preproc, SIGTERM);
5367 errno = savederrno;
5368 err(EX_OSERR, "fdopen()");
5369 }
5370 }
5371 }
5372
5373 while (fgets(buf, BUFSIZ, f)) { /* read commands */
5374 char linename[10];
5375 char *args[1];
5376
5377 lineno++;
5378 sprintf(linename, "Line %d", lineno);
5379 setprogname(linename); /* XXX */
5380 args[0] = buf;
5381 ipfw_main(1, args);
5382 }
5383 fclose(f);
5384 if (cmd != NULL) {
5385 int status;
5386
5387 if (waitpid(preproc, &status, 0) == -1)
5388 errx(EX_OSERR, "waitpid()");
5389 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
5390 errx(EX_UNAVAILABLE,
5391 "preprocessor exited with status %d",
5392 WEXITSTATUS(status));
5393 else if (WIFSIGNALED(status))
5394 errx(EX_UNAVAILABLE,
5395 "preprocessor exited with signal %d",
5396 WTERMSIG(status));
5397 }
5398}
5399
5400int
5401main(int ac, char *av[])
5402{
5403 /*
5404 * If the last argument is an absolute pathname, interpret it
5405 * as a file to be preprocessed.
5406 */
5407
5408 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
5409 ipfw_readfile(ac, av);
5410 else {
5411 if (ipfw_main(ac-1, av+1))
5412 show_usage();
5413 }
5414 return EX_OK;
5415}