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MFC: Fix a panic on boot that can occur if you hit keys on the keyboard
[dragonfly.git] / sbin / ipfw / ipfw2.c
blob570d3ecb9d970fe02211854571cceb7f13322147
1 /*
2 * Copyright (c) 2002 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: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
21 * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.12 2007/11/05 08:58:35 sephe Exp $
22 */
23
24 #include <sys/param.h>
25 #include <sys/mbuf.h>
26 #include <sys/socket.h>
27 #include <sys/sockio.h>
28 #include <sys/sysctl.h>
29 #include <sys/time.h>
30 #include <sys/wait.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 <unistd.h>
45 #include <sysexits.h>
46
47 #include <net/if.h>
48 #include <netinet/in.h>
49 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip_icmp.h>
52 #include <net/ipfw/ip_fw.h>
53 #include <net/route.h> /* def. of struct route */
54 #include <net/ethernet.h>
55 #include <net/dummynet/ip_dummynet.h>
56 #include <netinet/tcp.h>
57 #include <arpa/inet.h>
58
59 int s, /* main RAW socket */
60 do_resolv, /* Would try to resolve all */
61 do_acct, /* Show packet/byte count */
62 do_time, /* Show time stamps */
63 do_quiet, /* Be quiet in add and flush */
64 do_force, /* Don't ask for confirmation */
65 do_pipe, /* this cmd refers to a pipe */
66 do_sort, /* field to sort results (0 = no) */
67 do_dynamic, /* display dynamic rules */
68 do_expired, /* display expired dynamic rules */
69 do_compact, /* show rules in compact mode */
70 show_sets, /* display rule sets */
71 verbose;
72
73 #define IP_MASK_ALL 0xffffffff
74
75 /*
76 * structure to hold flag names and associated values to be
77 * set in the appropriate masks.
78 * A NULL string terminates the array.
79 * Often, an element with 0 value contains an error string.
80 *
81 */
82 struct _s_x {
83 char *s;
84 int x;
85 };
86
87 static struct _s_x f_tcpflags[] = {
88 { "syn", TH_SYN },
89 { "fin", TH_FIN },
90 { "ack", TH_ACK },
91 { "psh", TH_PUSH },
92 { "rst", TH_RST },
93 { "urg", TH_URG },
94 { "tcp flag", 0 },
95 { NULL, 0 }
96 };
97
98 static struct _s_x f_tcpopts[] = {
99 { "mss", IP_FW_TCPOPT_MSS },
100 { "maxseg", IP_FW_TCPOPT_MSS },
101 { "window", IP_FW_TCPOPT_WINDOW },
102 { "sack", IP_FW_TCPOPT_SACK },
103 { "ts", IP_FW_TCPOPT_TS },
104 { "timestamp", IP_FW_TCPOPT_TS },
105 { "cc", IP_FW_TCPOPT_CC },
106 { "tcp option", 0 },
107 { NULL, 0 }
108 };
109
110 /*
111 * IP options span the range 0 to 255 so we need to remap them
112 * (though in fact only the low 5 bits are significant).
113 */
114 static struct _s_x f_ipopts[] = {
115 { "ssrr", IP_FW_IPOPT_SSRR},
116 { "lsrr", IP_FW_IPOPT_LSRR},
117 { "rr", IP_FW_IPOPT_RR},
118 { "ts", IP_FW_IPOPT_TS},
119 { "ip option", 0 },
120 { NULL, 0 }
121 };
122
123 static struct _s_x f_iptos[] = {
124 { "lowdelay", IPTOS_LOWDELAY},
125 { "throughput", IPTOS_THROUGHPUT},
126 { "reliability", IPTOS_RELIABILITY},
127 { "mincost", IPTOS_MINCOST},
128 { "congestion", IPTOS_CE},
129 { "ecntransport", IPTOS_ECT},
130 { "ip tos option", 0},
131 { NULL, 0 }
132 };
133
134 static struct _s_x limit_masks[] = {
135 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
136 {"src-addr", DYN_SRC_ADDR},
137 {"src-port", DYN_SRC_PORT},
138 {"dst-addr", DYN_DST_ADDR},
139 {"dst-port", DYN_DST_PORT},
140 {NULL, 0}
141 };
142
143 /*
144 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
145 * This is only used in this code.
146 */
147 #define IPPROTO_ETHERTYPE 0x1000
148 static struct _s_x ether_types[] = {
149 /*
150 * Note, we cannot use "-:&/" in the names because they are field
151 * separators in the type specifications. Also, we use s = NULL as
152 * end-delimiter, because a type of 0 can be legal.
153 */
154 { "ip", 0x0800 },
155 { "ipv4", 0x0800 },
156 { "ipv6", 0x86dd },
157 { "arp", 0x0806 },
158 { "rarp", 0x8035 },
159 { "vlan", 0x8100 },
160 { "loop", 0x9000 },
161 { "trail", 0x1000 },
162 { "at", 0x809b },
163 { "atalk", 0x809b },
164 { "aarp", 0x80f3 },
165 { "pppoe_disc", 0x8863 },
166 { "pppoe_sess", 0x8864 },
167 { "ipx_8022", 0x00E0 },
168 { "ipx_8023", 0x0000 },
169 { "ipx_ii", 0x8137 },
170 { "ipx_snap", 0x8137 },
171 { "ipx", 0x8137 },
172 { "ns", 0x0600 },
173 { NULL, 0 }
174 };
175
176 static void show_usage(void);
177
178 enum tokens {
179 TOK_NULL=0,
180
181 TOK_OR,
182 TOK_NOT,
183 TOK_STARTBRACE,
184 TOK_ENDBRACE,
185
186 TOK_ACCEPT,
187 TOK_COUNT,
188 TOK_PIPE,
189 TOK_QUEUE,
190 TOK_DIVERT,
191 TOK_TEE,
192 TOK_FORWARD,
193 TOK_SKIPTO,
194 TOK_DENY,
195 TOK_REJECT,
196 TOK_RESET,
197 TOK_UNREACH,
198 TOK_CHECKSTATE,
199
200 TOK_UID,
201 TOK_GID,
202 TOK_IN,
203 TOK_LIMIT,
204 TOK_KEEPSTATE,
205 TOK_LAYER2,
206 TOK_OUT,
207 TOK_XMIT,
208 TOK_RECV,
209 TOK_VIA,
210 TOK_FRAG,
211 TOK_IPOPTS,
212 TOK_IPLEN,
213 TOK_IPID,
214 TOK_IPPRECEDENCE,
215 TOK_IPTOS,
216 TOK_IPTTL,
217 TOK_IPVER,
218 TOK_ESTAB,
219 TOK_SETUP,
220 TOK_TCPFLAGS,
221 TOK_TCPOPTS,
222 TOK_TCPSEQ,
223 TOK_TCPACK,
224 TOK_TCPWIN,
225 TOK_ICMPTYPES,
226 TOK_MAC,
227 TOK_MACTYPE,
228
229 TOK_PLR,
230 TOK_NOERROR,
231 TOK_BUCKETS,
232 TOK_DSTIP,
233 TOK_SRCIP,
234 TOK_DSTPORT,
235 TOK_SRCPORT,
236 TOK_ALL,
237 TOK_MASK,
238 TOK_BW,
239 TOK_DELAY,
240 TOK_RED,
241 TOK_GRED,
242 TOK_DROPTAIL,
243 TOK_PROTO,
244 TOK_WEIGHT,
245 };
246
247 struct _s_x dummynet_params[] = {
248 { "plr", TOK_PLR },
249 { "noerror", TOK_NOERROR },
250 { "buckets", TOK_BUCKETS },
251 { "dst-ip", TOK_DSTIP },
252 { "src-ip", TOK_SRCIP },
253 { "dst-port", TOK_DSTPORT },
254 { "src-port", TOK_SRCPORT },
255 { "proto", TOK_PROTO },
256 { "weight", TOK_WEIGHT },
257 { "all", TOK_ALL },
258 { "mask", TOK_MASK },
259 { "droptail", TOK_DROPTAIL },
260 { "red", TOK_RED },
261 { "gred", TOK_GRED },
262 { "bw", TOK_BW },
263 { "bandwidth", TOK_BW },
264 { "delay", TOK_DELAY },
265 { "pipe", TOK_PIPE },
266 { "queue", TOK_QUEUE },
267 { "dummynet-params", TOK_NULL },
268 { NULL, 0 }
269 };
270
271 struct _s_x rule_actions[] = {
272 { "accept", TOK_ACCEPT },
273 { "pass", TOK_ACCEPT },
274 { "allow", TOK_ACCEPT },
275 { "permit", TOK_ACCEPT },
276 { "count", TOK_COUNT },
277 { "pipe", TOK_PIPE },
278 { "queue", TOK_QUEUE },
279 { "divert", TOK_DIVERT },
280 { "tee", TOK_TEE },
281 { "fwd", TOK_FORWARD },
282 { "forward", TOK_FORWARD },
283 { "skipto", TOK_SKIPTO },
284 { "deny", TOK_DENY },
285 { "drop", TOK_DENY },
286 { "reject", TOK_REJECT },
287 { "reset", TOK_RESET },
288 { "unreach", TOK_UNREACH },
289 { "check-state", TOK_CHECKSTATE },
290 { NULL, TOK_NULL },
291 { NULL, 0 }
292 };
293
294 struct _s_x rule_options[] = {
295 { "uid", TOK_UID },
296 { "gid", TOK_GID },
297 { "in", TOK_IN },
298 { "limit", TOK_LIMIT },
299 { "keep-state", TOK_KEEPSTATE },
300 { "layer2", TOK_LAYER2 },
301 { "out", TOK_OUT },
302 { "xmit", TOK_XMIT },
303 { "recv", TOK_RECV },
304 { "via", TOK_VIA },
305 { "fragment", TOK_FRAG },
306 { "frag", TOK_FRAG },
307 { "ipoptions", TOK_IPOPTS },
308 { "ipopts", TOK_IPOPTS },
309 { "iplen", TOK_IPLEN },
310 { "ipid", TOK_IPID },
311 { "ipprecedence", TOK_IPPRECEDENCE },
312 { "iptos", TOK_IPTOS },
313 { "ipttl", TOK_IPTTL },
314 { "ipversion", TOK_IPVER },
315 { "ipver", TOK_IPVER },
316 { "estab", TOK_ESTAB },
317 { "established", TOK_ESTAB },
318 { "setup", TOK_SETUP },
319 { "tcpflags", TOK_TCPFLAGS },
320 { "tcpflgs", TOK_TCPFLAGS },
321 { "tcpoptions", TOK_TCPOPTS },
322 { "tcpopts", TOK_TCPOPTS },
323 { "tcpseq", TOK_TCPSEQ },
324 { "tcpack", TOK_TCPACK },
325 { "tcpwin", TOK_TCPWIN },
326 { "icmptype", TOK_ICMPTYPES },
327 { "icmptypes", TOK_ICMPTYPES },
328 { "dst-ip", TOK_DSTIP },
329 { "src-ip", TOK_SRCIP },
330 { "dst-port", TOK_DSTPORT },
331 { "src-port", TOK_SRCPORT },
332 { "proto", TOK_PROTO },
333 { "MAC", TOK_MAC },
334 { "mac", TOK_MAC },
335 { "mac-type", TOK_MACTYPE },
336
337 { "not", TOK_NOT }, /* pseudo option */
338 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
339 { "or", TOK_OR }, /* pseudo option */
340 { "|", /* escape */ TOK_OR }, /* pseudo option */
341 { "{", TOK_STARTBRACE }, /* pseudo option */
342 { "(", TOK_STARTBRACE }, /* pseudo option */
343 { "}", TOK_ENDBRACE }, /* pseudo option */
344 { ")", TOK_ENDBRACE }, /* pseudo option */
345 { NULL, TOK_NULL },
346 { NULL, 0 }
347 };
348
349 /**
350 * match_token takes a table and a string, returns the value associated
351 * with the string (0 meaning an error in most cases)
352 */
353 static int
354 match_token(struct _s_x *table, char *string)
355 {
356 struct _s_x *pt;
357 int i = strlen(string);
358
359 for (pt = table ; i && pt->s != NULL ; pt++)
360 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
361 return pt->x;
362 return -1;
363 };
364
365 static char *
366 match_value(struct _s_x *p, u_int32_t value)
367 {
368 for (; p->s != NULL; p++)
369 if (p->x == value)
370 return p->s;
371 return NULL;
372 }
373
374 /*
375 * prints one port, symbolic or numeric
376 */
377 static void
378 print_port(int proto, u_int16_t port)
379 {
380
381 if (proto == IPPROTO_ETHERTYPE) {
382 char *s;
383
384 if (do_resolv && (s = match_value(ether_types, port)) )
385 printf("%s", s);
386 else
387 printf("0x%04x", port);
388 } else {
389 struct servent *se = NULL;
390 if (do_resolv) {
391 struct protoent *pe = getprotobynumber(proto);
392
393 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
394 }
395 if (se)
396 printf("%s", se->s_name);
397 else
398 printf("%d", port);
399 }
400 }
401
402 /*
403 * print the values in a list of ports
404 * XXX todo: add support for mask.
405 */
406 static void
407 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
408 {
409 u_int16_t *p = cmd->ports;
410 int i;
411 char *sep= " ";
412
413 if (cmd->o.len & F_NOT)
414 printf(" not");
415 if (opcode != 0)
416 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
417 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
418 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
419 printf(sep);
420 print_port(proto, p[0]);
421 if (p[0] != p[1]) {
422 printf("-");
423 print_port(proto, p[1]);
424 }
425 sep = ",";
426 }
427 }
428
429 /*
430 * Like strtol, but also translates service names into port numbers
431 * for some protocols.
432 * In particular:
433 * proto == -1 disables the protocol check;
434 * proto == IPPROTO_ETHERTYPE looks up an internal table
435 * proto == <some value in /etc/protocols> matches the values there.
436 * Returns *end == s in case the parameter is not found.
437 */
438 static int
439 strtoport(char *s, char **end, int base, int proto)
440 {
441 char *p, *buf;
442 char *s1;
443 int i;
444
445 *end = s; /* default - not found */
446 if ( *s == '\0')
447 return 0; /* not found */
448
449 if (isdigit(*s))
450 return strtol(s, end, base);
451
452 /*
453 * find separator. '\\' escapes the next char.
454 */
455 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
456 if (*s1 == '\\' && s1[1] != '\0')
457 s1++;
458
459 buf = malloc(s1 - s + 1);
460 if (buf == NULL)
461 return 0;
462
463 /*
464 * copy into a buffer skipping backslashes
465 */
466 for (p = s, i = 0; p != s1 ; p++)
467 if ( *p != '\\')
468 buf[i++] = *p;
469 buf[i++] = '\0';
470
471 if (proto == IPPROTO_ETHERTYPE) {
472 i = match_token(ether_types, buf);
473 free(buf);
474 if (i != -1) { /* found */
475 *end = s1;
476 return i;
477 }
478 } else {
479 struct protoent *pe = NULL;
480 struct servent *se;
481
482 if (proto != 0)
483 pe = getprotobynumber(proto);
484 setservent(1);
485 se = getservbyname(buf, pe ? pe->p_name : NULL);
486 free(buf);
487 if (se != NULL) {
488 *end = s1;
489 return ntohs(se->s_port);
490 }
491 }
492 return 0; /* not found */
493 }
494
495 /*
496 * fill the body of the command with the list of port ranges.
497 * At the moment it only understands numeric ranges.
498 */
499 static int
500 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
501 {
502 u_int16_t *p = cmd->ports;
503 int i = 0;
504 char *s = av;
505
506 while (*s) {
507 u_int16_t a, b;
508
509 a = strtoport(av, &s, 0, proto);
510 if (s == av) /* no parameter */
511 break;
512 if (*s == '-') { /* a range */
513 av = s+1;
514 b = strtoport(av, &s, 0, proto);
515 if (s == av) /* no parameter */
516 break;
517 p[0] = a;
518 p[1] = b;
519 } else if (*s == ',' || *s == '\0' ) {
520 p[0] = p[1] = a;
521 } else { /* invalid separator */
522 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
523 *s, av);
524 }
525 i++;
526 p += 2;
527 av = s+1;
528 }
529 if (i > 0) {
530 if (i+1 > F_LEN_MASK)
531 errx(EX_DATAERR, "too many ports/ranges\n");
532 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
533 }
534 return i;
535 }
536
537 static struct _s_x icmpcodes[] = {
538 { "net", ICMP_UNREACH_NET },
539 { "host", ICMP_UNREACH_HOST },
540 { "protocol", ICMP_UNREACH_PROTOCOL },
541 { "port", ICMP_UNREACH_PORT },
542 { "needfrag", ICMP_UNREACH_NEEDFRAG },
543 { "srcfail", ICMP_UNREACH_SRCFAIL },
544 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
545 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
546 { "isolated", ICMP_UNREACH_ISOLATED },
547 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
548 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
549 { "tosnet", ICMP_UNREACH_TOSNET },
550 { "toshost", ICMP_UNREACH_TOSHOST },
551 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
552 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
553 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
554 { NULL, 0 }
555 };
556
557 static void
558 fill_reject_code(u_short *codep, char *str)
559 {
560 int val;
561 char *s;
562
563 val = strtoul(str, &s, 0);
564 if (s == str || *s != '\0' || val >= 0x100)
565 val = match_token(icmpcodes, str);
566 if (val < 0)
567 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
568 *codep = val;
569 return;
570 }
571
572 static void
573 print_reject_code(u_int16_t code)
574 {
575 char *s = match_value(icmpcodes, code);
576
577 if (s != NULL)
578 printf("unreach %s", s);
579 else
580 printf("unreach %u", code);
581 }
582
583 /*
584 * Returns the number of bits set (from left) in a contiguous bitmask,
585 * or -1 if the mask is not contiguous.
586 * XXX this needs a proper fix.
587 * This effectively works on masks in big-endian (network) format.
588 * when compiled on little endian architectures.
589 *
590 * First bit is bit 7 of the first byte -- note, for MAC addresses,
591 * the first bit on the wire is bit 0 of the first byte.
592 * len is the max length in bits.
593 */
594 static int
595 contigmask(u_char *p, int len)
596 {
597 int i, n;
598 for (i=0; i<len ; i++)
599 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
600 break;
601 for (n=i+1; n < len; n++)
602 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
603 return -1; /* mask not contiguous */
604 return i;
605 }
606
607 /*
608 * print flags set/clear in the two bitmasks passed as parameters.
609 * There is a specialized check for f_tcpflags.
610 */
611 static void
612 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list)
613 {
614 char *comma="";
615 int i;
616 u_char set = cmd->arg1 & 0xff;
617 u_char clear = (cmd->arg1 >> 8) & 0xff;
618
619 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
620 printf(" setup");
621 return;
622 }
623
624 printf(" %s ", name);
625 for (i=0; list[i].x != 0; i++) {
626 if (set & list[i].x) {
627 set &= ~list[i].x;
628 printf("%s%s", comma, list[i].s);
629 comma = ",";
630 }
631 if (clear & list[i].x) {
632 clear &= ~list[i].x;
633 printf("%s!%s", comma, list[i].s);
634 comma = ",";
635 }
636 }
637 }
638
639 /*
640 * Print the ip address contained in a command.
641 */
642 static void
643 print_ip(ipfw_insn_ip *cmd, char *s)
644 {
645 struct hostent *he = NULL;
646 int mb;
647
648 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
649
650 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
651 printf("me");
652 return;
653 }
654 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
655 u_int32_t x, *d;
656 int i;
657 char comma = '{';
658
659 x = cmd->o.arg1 - 1;
660 x = htonl( ~x );
661 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
662 printf("%s/%d", inet_ntoa(cmd->addr),
663 contigmask((u_char *)&x, 32));
664 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
665 x &= 0xff; /* base */
666 d = (u_int32_t *)&(cmd->mask);
667 for (i=0; i < cmd->o.arg1; i++)
668 if (d[ i/32] & (1<<(i & 31))) {
669 printf("%c%d", comma, i+x);
670 comma = ',';
671 }
672 printf("}");
673 return;
674 }
675 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
676 mb = 32;
677 else
678 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
679 if (mb == 32 && do_resolv)
680 he = gethostbyaddr((char *)&(cmd->addr.s_addr),
681 sizeof(u_long), AF_INET);
682 if (he != NULL) /* resolved to name */
683 printf("%s", he->h_name);
684 else if (mb == 0) /* any */
685 printf("any");
686 else { /* numeric IP followed by some kind of mask */
687 printf("%s", inet_ntoa(cmd->addr));
688 if (mb < 0)
689 printf(":%s", inet_ntoa(cmd->mask));
690 else if (mb < 32)
691 printf("/%d", mb);
692 }
693 }
694
695 /*
696 * prints a MAC address/mask pair
697 */
698 static void
699 print_mac(u_char *addr, u_char *mask)
700 {
701 int l = contigmask(mask, 48);
702
703 if (l == 0)
704 printf(" any");
705 else {
706 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
707 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
708 if (l == -1)
709 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
710 mask[0], mask[1], mask[2],
711 mask[3], mask[4], mask[5]);
712 else if (l < 48)
713 printf("/%d", l);
714 }
715 }
716
717 static void
718 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
719 {
720 u_int8_t type;
721
722 cmd->d[0] = 0;
723 while (*av) {
724 if (*av == ',')
725 av++;
726
727 type = strtoul(av, &av, 0);
728
729 if (*av != ',' && *av != '\0')
730 errx(EX_DATAERR, "invalid ICMP type");
731
732 if (type > 31)
733 errx(EX_DATAERR, "ICMP type out of range");
734
735 cmd->d[0] |= 1 << type;
736 }
737 cmd->o.opcode = O_ICMPTYPE;
738 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
739 }
740
741 static void
742 print_icmptypes(ipfw_insn_u32 *cmd)
743 {
744 int i;
745 char sep= ' ';
746
747 printf(" icmptypes");
748 for (i = 0; i < 32; i++) {
749 if ( (cmd->d[0] & (1 << (i))) == 0)
750 continue;
751 printf("%c%d", sep, i);
752 sep = ',';
753 }
754 }
755
756 /*
757 * show_ipfw() prints the body of an ipfw rule.
758 * Because the standard rule has at least proto src_ip dst_ip, we use
759 * a helper function to produce these entries if not provided explicitly.
760 * The first argument is the list of fields we have, the second is
761 * the list of fields we want to be printed.
762 *
763 * Special cases if we have provided a MAC header:
764 * + if the rule does not contain IP addresses/ports, do not print them;
765 * + if the rule does not contain an IP proto, print "all" instead of "ip";
766 *
767 * Once we have 'have_options', IP header fields are printed as options.
768 */
769 #define HAVE_PROTO 0x0001
770 #define HAVE_SRCIP 0x0002
771 #define HAVE_DSTIP 0x0004
772 #define HAVE_MAC 0x0008
773 #define HAVE_MACTYPE 0x0010
774 #define HAVE_OPTIONS 0x8000
775
776 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
777 static void
778 show_prerequisites(int *flags, int want, int cmd)
779 {
780 if ( (*flags & HAVE_IP) == HAVE_IP)
781 *flags |= HAVE_OPTIONS;
782
783 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
784 cmd != O_MAC_TYPE) {
785 /*
786 * mac-type was optimized out by the compiler,
787 * restore it
788 */
789 printf(" any");
790 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
791 return;
792 }
793 if ( !(*flags & HAVE_OPTIONS)) {
794 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
795 printf(" ip");
796 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
797 printf(" from any");
798 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
799 printf(" to any");
800 }
801 *flags |= want;
802 }
803
804 static void
805 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
806 {
807 static int twidth = 0;
808 int l;
809 ipfw_insn *cmd;
810 int proto = 0; /* default */
811 int flags = 0; /* prerequisites */
812 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
813 int or_block = 0; /* we are in an or block */
814
815 u_int32_t set_disable = rule->set_disable;
816
817 if (set_disable & (1 << rule->set)) { /* disabled */
818 if (!show_sets)
819 return;
820 else
821 printf("# DISABLED ");
822 }
823 printf("%05u ", rule->rulenum);
824
825 if (do_acct)
826 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth,
827 rule->bcnt);
828
829 if (do_time) {
830 char timestr[30];
831
832 if (twidth == 0) {
833 strcpy(timestr, ctime((time_t *)&twidth));
834 *strchr(timestr, '\n') = '\0';
835 twidth = strlen(timestr);
836 }
837 if (rule->timestamp) {
838 #if _FreeBSD_version < 500000 /* XXX check */
839 #define _long_to_time(x) (time_t)(x)
840 #endif
841 time_t t = _long_to_time(rule->timestamp);
842
843 strcpy(timestr, ctime(&t));
844 *strchr(timestr, '\n') = '\0';
845 printf("%s ", timestr);
846 } else {
847 printf("%*s ", twidth, " ");
848 }
849 }
850
851 if (show_sets)
852 printf("set %d ", rule->set);
853
854 /*
855 * print the optional "match probability"
856 */
857 if (rule->cmd_len > 0) {
858 cmd = rule->cmd ;
859 if (cmd->opcode == O_PROB) {
860 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
861 double d = 1.0 * p->d[0];
862
863 d = (d / 0x7fffffff);
864 printf("prob %f ", d);
865 }
866 }
867
868 /*
869 * first print actions
870 */
871 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
872 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
873 switch(cmd->opcode) {
874 case O_CHECK_STATE:
875 printf("check-state");
876 flags = HAVE_IP; /* avoid printing anything else */
877 break;
878
879 case O_ACCEPT:
880 printf("allow");
881 break;
882
883 case O_COUNT:
884 printf("count");
885 break;
886
887 case O_DENY:
888 printf("deny");
889 break;
890
891 case O_REJECT:
892 if (cmd->arg1 == ICMP_REJECT_RST)
893 printf("reset");
894 else if (cmd->arg1 == ICMP_UNREACH_HOST)
895 printf("reject");
896 else
897 print_reject_code(cmd->arg1);
898 break;
899
900 case O_SKIPTO:
901 printf("skipto %u", cmd->arg1);
902 break;
903
904 case O_PIPE:
905 printf("pipe %u", cmd->arg1);
906 break;
907
908 case O_QUEUE:
909 printf("queue %u", cmd->arg1);
910 break;
911
912 case O_DIVERT:
913 printf("divert %u", cmd->arg1);
914 break;
915
916 case O_TEE:
917 printf("tee %u", cmd->arg1);
918 break;
919
920 case O_FORWARD_IP:
921 {
922 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
923
924 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
925 if (s->sa.sin_port)
926 printf(",%d", s->sa.sin_port);
927 }
928 break;
929
930 case O_LOG: /* O_LOG is printed last */
931 logptr = (ipfw_insn_log *)cmd;
932 break;
933
934 default:
935 printf("** unrecognized action %d len %d",
936 cmd->opcode, cmd->len);
937 }
938 }
939 if (logptr) {
940 if (logptr->max_log > 0)
941 printf(" log logamount %d", logptr->max_log);
942 else
943 printf(" log");
944 }
945
946 /*
947 * then print the body.
948 */
949 if (rule->usr_flags & IPFW_USR_F_NORULE) {
950 /* empty rules before options */
951 if (!do_compact)
952 printf(" ip from any to any");
953 flags |= HAVE_IP | HAVE_OPTIONS;
954 }
955
956 for (l = rule->act_ofs, cmd = rule->cmd ;
957 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
958 /* useful alias */
959 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
960
961 show_prerequisites(&flags, 0, cmd->opcode);
962
963 switch(cmd->opcode) {
964 case O_PROB:
965 break; /* done already */
966
967 case O_PROBE_STATE:
968 break; /* no need to print anything here */
969
970 case O_MACADDR2: {
971 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
972
973 if ((cmd->len & F_OR) && !or_block)
974 printf(" {");
975 if (cmd->len & F_NOT)
976 printf(" not");
977 printf(" MAC");
978 flags |= HAVE_MAC;
979 print_mac( m->addr, m->mask);
980 print_mac( m->addr + 6, m->mask + 6);
981 }
982 break;
983
984 case O_MAC_TYPE:
985 if ((cmd->len & F_OR) && !or_block)
986 printf(" {");
987 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
988 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
989 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
990 break;
991
992 case O_IP_SRC:
993 case O_IP_SRC_MASK:
994 case O_IP_SRC_ME:
995 case O_IP_SRC_SET:
996 show_prerequisites(&flags, HAVE_PROTO, 0);
997 if (!(flags & HAVE_SRCIP))
998 printf(" from");
999 if ((cmd->len & F_OR) && !or_block)
1000 printf(" {");
1001 print_ip((ipfw_insn_ip *)cmd,
1002 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1003 flags |= HAVE_SRCIP;
1004 break;
1005
1006 case O_IP_DST:
1007 case O_IP_DST_MASK:
1008 case O_IP_DST_ME:
1009 case O_IP_DST_SET:
1010 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1011 if (!(flags & HAVE_DSTIP))
1012 printf(" to");
1013 if ((cmd->len & F_OR) && !or_block)
1014 printf(" {");
1015 print_ip((ipfw_insn_ip *)cmd,
1016 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1017 flags |= HAVE_DSTIP;
1018 break;
1019
1020 case O_IP_DSTPORT:
1021 show_prerequisites(&flags, HAVE_IP, 0);
1022 case O_IP_SRCPORT:
1023 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1024 if ((cmd->len & F_OR) && !or_block)
1025 printf(" {");
1026 print_newports((ipfw_insn_u16 *)cmd, proto,
1027 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1028 break;
1029
1030 case O_PROTO: {
1031 struct protoent *pe;
1032
1033 if ((cmd->len & F_OR) && !or_block)
1034 printf(" {");
1035 if (cmd->len & F_NOT)
1036 printf(" not");
1037 proto = cmd->arg1;
1038 pe = getprotobynumber(cmd->arg1);
1039 if (flags & HAVE_OPTIONS)
1040 printf(" proto");
1041 if (pe)
1042 printf(" %s", pe->p_name);
1043 else
1044 printf(" %u", cmd->arg1);
1045 }
1046 flags |= HAVE_PROTO;
1047 break;
1048
1049 default: /*options ... */
1050 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1051 if ((cmd->len & F_OR) && !or_block)
1052 printf(" {");
1053 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1054 printf(" not");
1055 switch(cmd->opcode) {
1056 case O_FRAG:
1057 printf(" frag");
1058 break;
1059
1060 case O_IN:
1061 printf(cmd->len & F_NOT ? " out" : " in");
1062 break;
1063
1064 case O_LAYER2:
1065 printf(" layer2");
1066 break;
1067 case O_XMIT:
1068 case O_RECV:
1069 case O_VIA: {
1070 char *s;
1071 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1072
1073 if (cmd->opcode == O_XMIT)
1074 s = "xmit";
1075 else if (cmd->opcode == O_RECV)
1076 s = "recv";
1077 else if (cmd->opcode == O_VIA)
1078 s = "via";
1079 else
1080 s = "?huh?";
1081 if (cmdif->name[0] == '\0')
1082 printf(" %s %s", s,
1083 inet_ntoa(cmdif->p.ip));
1084 printf(" %s %s", s, cmdif->name);
1085 }
1086 break;
1087
1088 case O_IPID:
1089 printf(" ipid %u", cmd->arg1 );
1090 break;
1091
1092 case O_IPTTL:
1093 printf(" ipttl %u", cmd->arg1 );
1094 break;
1095
1096 case O_IPVER:
1097 printf(" ipver %u", cmd->arg1 );
1098 break;
1099
1100 case O_IPPRECEDENCE:
1101 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1102 break;
1103
1104 case O_IPLEN:
1105 printf(" iplen %u", cmd->arg1 );
1106 break;
1107
1108 case O_IPOPT:
1109 print_flags("ipoptions", cmd, f_ipopts);
1110 break;
1111
1112 case O_IPTOS:
1113 print_flags("iptos", cmd, f_iptos);
1114 break;
1115
1116 case O_ICMPTYPE:
1117 print_icmptypes((ipfw_insn_u32 *)cmd);
1118 break;
1119
1120 case O_ESTAB:
1121 printf(" established");
1122 break;
1123
1124 case O_TCPFLAGS:
1125 print_flags("tcpflags", cmd, f_tcpflags);
1126 break;
1127
1128 case O_TCPOPTS:
1129 print_flags("tcpoptions", cmd, f_tcpopts);
1130 break;
1131
1132 case O_TCPWIN:
1133 printf(" tcpwin %d", ntohs(cmd->arg1));
1134 break;
1135
1136 case O_TCPACK:
1137 printf(" tcpack %ld", ntohl(cmd32->d[0]));
1138 break;
1139
1140 case O_TCPSEQ:
1141 printf(" tcpseq %ld", ntohl(cmd32->d[0]));
1142 break;
1143
1144 case O_UID:
1145 {
1146 struct passwd *pwd = getpwuid(cmd32->d[0]);
1147
1148 if (pwd)
1149 printf(" uid %s", pwd->pw_name);
1150 else
1151 printf(" uid %u", cmd32->d[0]);
1152 }
1153 break;
1154
1155 case O_GID:
1156 {
1157 struct group *grp = getgrgid(cmd32->d[0]);
1158
1159 if (grp)
1160 printf(" gid %s", grp->gr_name);
1161 else
1162 printf(" gid %u", cmd32->d[0]);
1163 }
1164 break;
1165
1166 case O_KEEP_STATE:
1167 printf(" keep-state");
1168 break;
1169
1170 case O_LIMIT:
1171 {
1172 struct _s_x *p = limit_masks;
1173 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1174 u_int8_t x = c->limit_mask;
1175 char *comma = " ";
1176
1177 printf(" limit");
1178 for ( ; p->x != 0 ; p++)
1179 if ((x & p->x) == p->x) {
1180 x &= ~p->x;
1181 printf("%s%s", comma, p->s);
1182 comma = ",";
1183 }
1184 printf(" %d", c->conn_limit);
1185 }
1186 break;
1187
1188 default:
1189 printf(" [opcode %d len %d]",
1190 cmd->opcode, cmd->len);
1191 }
1192 }
1193 if (cmd->len & F_OR) {
1194 printf(" or");
1195 or_block = 1;
1196 } else if (or_block) {
1197 printf(" }");
1198 or_block = 0;
1199 }
1200 }
1201 show_prerequisites(&flags, HAVE_IP, 0);
1202
1203 printf("\n");
1204 }
1205
1206 static void
1207 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1208 {
1209 struct protoent *pe;
1210 struct in_addr a;
1211
1212 if (!do_expired) {
1213 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1214 return;
1215 }
1216
1217 printf("%05u %*llu %*llu (%ds)", d->rulenum, pcwidth, d->pcnt,
1218 bcwidth, d->bcnt, d->expire);
1219 switch (d->dyn_type) {
1220 case O_LIMIT_PARENT:
1221 printf(" PARENT %d", d->count);
1222 break;
1223 case O_LIMIT:
1224 printf(" LIMIT");
1225 break;
1226 case O_KEEP_STATE: /* bidir, no mask */
1227 printf(" STATE");
1228 break;
1229 }
1230
1231 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1232 printf(" %s", pe->p_name);
1233 else
1234 printf(" proto %u", d->id.u.ip.proto);
1235
1236 a.s_addr = htonl(d->id.u.ip.src_ip);
1237 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1238
1239 a.s_addr = htonl(d->id.u.ip.dst_ip);
1240 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1241 printf("\n");
1242 }
1243
1244 int
1245 sort_q(const void *pa, const void *pb)
1246 {
1247 int rev = (do_sort < 0);
1248 int field = rev ? -do_sort : do_sort;
1249 long long res = 0;
1250 const struct dn_ioc_flowqueue *a = pa;
1251 const struct dn_ioc_flowqueue *b = pb;
1252
1253 switch (field) {
1254 case 1: /* pkts */
1255 res = a->len - b->len;
1256 break;
1257 case 2: /* bytes */
1258 res = a->len_bytes - b->len_bytes;
1259 break;
1260
1261 case 3: /* tot pkts */
1262 res = a->tot_pkts - b->tot_pkts;
1263 break;
1264
1265 case 4: /* tot bytes */
1266 res = a->tot_bytes - b->tot_bytes;
1267 break;
1268 }
1269 if (res < 0)
1270 res = -1;
1271 if (res > 0)
1272 res = 1;
1273 return (int)(rev ? res : -res);
1274 }
1275
1276 static void
1277 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1278 {
1279 int l;
1280
1281 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1282 fs->flow_mask.u.ip.proto,
1283 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1284 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1285 if (fs->rq_elements == 0)
1286 return;
1287
1288 printf("BKT Prot ___Source IP/port____ "
1289 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1290 if (do_sort != 0)
1291 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1292 for (l = 0; l < fs->rq_elements; l++) {
1293 struct in_addr ina;
1294 struct protoent *pe;
1295
1296 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1297 printf("%3d ", q[l].hash_slot);
1298 pe = getprotobynumber(q[l].id.u.ip.proto);
1299 if (pe)
1300 printf("%-4s ", pe->p_name);
1301 else
1302 printf("%4u ", q[l].id.u.ip.proto);
1303 printf("%15s/%-5d ",
1304 inet_ntoa(ina), q[l].id.u.ip.src_port);
1305 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1306 printf("%15s/%-5d ",
1307 inet_ntoa(ina), q[l].id.u.ip.dst_port);
1308 printf("%4qu %8qu %2u %4u %3u\n",
1309 q[l].tot_pkts, q[l].tot_bytes,
1310 q[l].len, q[l].len_bytes, q[l].drops);
1311 if (verbose)
1312 printf(" S %20qd F %20qd\n",
1313 q[l].S, q[l].F);
1314 }
1315 }
1316
1317 static void
1318 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1319 {
1320 int l;
1321 char qs[30];
1322 char plr[30];
1323 char red[90]; /* Display RED parameters */
1324
1325 l = fs->qsize;
1326 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1327 if (l >= 8192)
1328 sprintf(qs, "%d KB", l / 1024);
1329 else
1330 sprintf(qs, "%d B", l);
1331 } else
1332 sprintf(qs, "%3d sl.", l);
1333 if (fs->plr)
1334 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1335 else
1336 plr[0] = '\0';
1337 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
1338 sprintf(red,
1339 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
1340 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1341 1.0 * fs->w_q / (double)(1 << SCALE_RED),
1342 SCALE_VAL(fs->min_th),
1343 SCALE_VAL(fs->max_th),
1344 1.0 * fs->max_p / (double)(1 << SCALE_RED));
1345 else
1346 sprintf(red, "droptail");
1347
1348 printf("%s %s%s %d queues (%d buckets) %s\n",
1349 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1350 }
1351
1352 static void
1353 list_pipes(void *data, int nbytes, int ac, char *av[])
1354 {
1355 u_long rulenum;
1356 void *next = data;
1357 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1358 struct dn_ioc_flowset *fs;
1359 struct dn_ioc_flowqueue *q;
1360 int l;
1361
1362 if (ac > 0)
1363 rulenum = strtoul(*av++, NULL, 10);
1364 else
1365 rulenum = 0;
1366 for (; nbytes >= sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1367 double b = p->bandwidth;
1368 char buf[30];
1369 char prefix[80];
1370
1371 if (p->fs.fs_type != DN_IS_PIPE)
1372 break; /* done with pipes, now queues */
1373
1374 /*
1375 * compute length, as pipe have variable size
1376 */
1377 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1378 next = (void *)p + l;
1379 nbytes -= l;
1380
1381 if (rulenum != 0 && rulenum != p->pipe_nr)
1382 continue;
1383
1384 /*
1385 * Print rate
1386 */
1387 if (b == 0)
1388 sprintf(buf, "unlimited");
1389 else if (b >= 1000000)
1390 sprintf(buf, "%7.3f Mbit/s", b/1000000);
1391 else if (b >= 1000)
1392 sprintf(buf, "%7.3f Kbit/s", b/1000);
1393 else
1394 sprintf(buf, "%7.3f bit/s ", b);
1395
1396 sprintf(prefix, "%05d: %s %4d ms ",
1397 p->pipe_nr, buf, p->delay);
1398 print_flowset_parms(&p->fs, prefix);
1399 if (verbose)
1400 printf(" V %20qd\n", p->V >> MY_M);
1401
1402 q = (struct dn_ioc_flowqueue *)(p+1);
1403 list_queues(&p->fs, q);
1404 }
1405 for (fs = next; nbytes >= sizeof(*fs); fs = next) {
1406 char prefix[80];
1407
1408 if (fs->fs_type != DN_IS_QUEUE)
1409 break;
1410 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1411 next = (void *)fs + l;
1412 nbytes -= l;
1413 q = (struct dn_ioc_flowqueue *)(fs+1);
1414 sprintf(prefix, "q%05d: weight %d pipe %d ",
1415 fs->fs_nr, fs->weight, fs->parent_nr);
1416 print_flowset_parms(fs, prefix);
1417 list_queues(fs, q);
1418 }
1419 }
1420
1421 /*
1422 * This one handles all set-related commands
1423 * ipfw set { show | enable | disable }
1424 * ipfw set swap X Y
1425 * ipfw set move X to Y
1426 * ipfw set move rule X to Y
1427 */
1428 static void
1429 sets_handler(int ac, char *av[])
1430 {
1431 u_int32_t set_disable, masks[2];
1432 int i, nbytes;
1433 u_int16_t rulenum;
1434 u_int8_t cmd, new_set;
1435
1436 ac--;
1437 av++;
1438
1439 if (!ac)
1440 errx(EX_USAGE, "set needs command");
1441 if (!strncmp(*av, "show", strlen(*av)) ) {
1442 void *data;
1443 char *msg;
1444
1445 nbytes = sizeof(struct ipfw_ioc_rule);
1446 if ((data = malloc(nbytes)) == NULL)
1447 err(EX_OSERR, "malloc");
1448 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1449 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1450 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1451
1452 for (i = 0, msg = "disable" ; i < 31; i++)
1453 if ( (set_disable & (1<<i))) {
1454 printf("%s %d", msg, i);
1455 msg = "";
1456 }
1457 msg = (set_disable) ? " enable" : "enable";
1458 for (i = 0; i < 31; i++)
1459 if ( !(set_disable & (1<<i))) {
1460 printf("%s %d", msg, i);
1461 msg = "";
1462 }
1463 printf("\n");
1464 } else if (!strncmp(*av, "swap", strlen(*av))) {
1465 ac--; av++;
1466 if (ac != 2)
1467 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1468 rulenum = atoi(av[0]);
1469 new_set = atoi(av[1]);
1470 if (!isdigit(*(av[0])) || rulenum > 30)
1471 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1472 if (!isdigit(*(av[1])) || new_set > 30)
1473 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1474 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1475 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1476 masks, sizeof(u_int32_t));
1477 } else if (!strncmp(*av, "move", strlen(*av))) {
1478 ac--; av++;
1479 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1480 cmd = 2;
1481 ac--; av++;
1482 } else
1483 cmd = 3;
1484 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1485 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1486 rulenum = atoi(av[0]);
1487 new_set = atoi(av[2]);
1488 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1489 (cmd == 2 && rulenum == 65535) )
1490 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1491 if (!isdigit(*(av[2])) || new_set > 30)
1492 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1493 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1494 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1495 masks, sizeof(u_int32_t));
1496 } else if (!strncmp(*av, "disable", strlen(*av)) ||
1497 !strncmp(*av, "enable", strlen(*av)) ) {
1498 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0;
1499
1500 ac--; av++;
1501 masks[0] = masks[1] = 0;
1502
1503 while (ac) {
1504 if (isdigit(**av)) {
1505 i = atoi(*av);
1506 if (i < 0 || i > 30)
1507 errx(EX_DATAERR,
1508 "invalid set number %d\n", i);
1509 masks[which] |= (1<<i);
1510 } else if (!strncmp(*av, "disable", strlen(*av)))
1511 which = 0;
1512 else if (!strncmp(*av, "enable", strlen(*av)))
1513 which = 1;
1514 else
1515 errx(EX_DATAERR,
1516 "invalid set command %s\n", *av);
1517 av++; ac--;
1518 }
1519 if ( (masks[0] & masks[1]) != 0 )
1520 errx(EX_DATAERR,
1521 "cannot enable and disable the same set\n");
1522
1523 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1524 if (i)
1525 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1526 } else
1527 errx(EX_USAGE, "invalid set command %s\n", *av);
1528 }
1529
1530 static void
1531 sysctl_handler(int ac, char *av[], int which)
1532 {
1533 ac--;
1534 av++;
1535
1536 if (*av == NULL) {
1537 warnx("missing keyword to enable/disable\n");
1538 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1539 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1540 &which, sizeof(which));
1541 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1542 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1543 &which, sizeof(which));
1544 } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1545 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1546 &which, sizeof(which));
1547 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1548 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1549 &which, sizeof(which));
1550 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1551 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1552 &which, sizeof(which));
1553 } else {
1554 warnx("unrecognize enable/disable keyword: %s\n", *av);
1555 }
1556 }
1557
1558 static void
1559 list(int ac, char *av[])
1560 {
1561 struct ipfw_ioc_rule *r;
1562 struct ipfw_ioc_state *dynrules, *d;
1563
1564 void *data = NULL;
1565 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1566 int exitval = EX_OK;
1567 int lac;
1568 char **lav;
1569 u_long rnum;
1570 char *endptr;
1571 int seen = 0;
1572
1573 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1574 int nalloc = 1024; /* start somewhere... */
1575
1576 ac--;
1577 av++;
1578
1579 /* get rules or pipes from kernel, resizing array as necessary */
1580 nbytes = nalloc;
1581
1582 while (nbytes >= nalloc) {
1583 nalloc = nalloc * 2 + 200;
1584 nbytes = nalloc;
1585 if ((data = realloc(data, nbytes)) == NULL)
1586 err(EX_OSERR, "realloc");
1587 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1588 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1589 do_pipe ? "DUMMYNET" : "FW");
1590 }
1591
1592 if (do_pipe) {
1593 list_pipes(data, nbytes, ac, av);
1594 goto done;
1595 }
1596
1597 /*
1598 * Count static rules.
1599 */
1600 r = data;
1601 nstat = r->static_count;
1602
1603 /*
1604 * Count dynamic rules. This is easier as they have
1605 * fixed size.
1606 */
1607 dynrules = (struct ipfw_ioc_state *)((void *)r + r->static_len);
1608 ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1609
1610 /* if showing stats, figure out column widths ahead of time */
1611 bcwidth = pcwidth = 0;
1612 if (do_acct) {
1613 for (n = 0, r = data; n < nstat;
1614 n++, r = (void *)r + IOC_RULESIZE(r)) {
1615 /* packet counter */
1616 width = snprintf(NULL, 0, "%llu", r->pcnt);
1617 if (width > pcwidth)
1618 pcwidth = width;
1619
1620 /* byte counter */
1621 width = snprintf(NULL, 0, "%llu", r->bcnt);
1622 if (width > bcwidth)
1623 bcwidth = width;
1624 }
1625 }
1626 if (do_dynamic && ndyn) {
1627 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1628 width = snprintf(NULL, 0, "%llu", d->pcnt);
1629 if (width > pcwidth)
1630 pcwidth = width;
1631
1632 width = snprintf(NULL, 0, "%llu", d->bcnt);
1633 if (width > bcwidth)
1634 bcwidth = width;
1635 }
1636 }
1637 /* if no rule numbers were specified, list all rules */
1638 if (ac == 0) {
1639 for (n = 0, r = data; n < nstat;
1640 n++, r = (void *)r + IOC_RULESIZE(r) )
1641 show_ipfw(r, pcwidth, bcwidth);
1642
1643 if (do_dynamic && ndyn) {
1644 printf("## Dynamic rules (%d):\n", ndyn);
1645 for (n = 0, d = dynrules; n < ndyn; n++, d++)
1646 show_dyn_ipfw(d, pcwidth, bcwidth);
1647 }
1648 goto done;
1649 }
1650
1651 /* display specific rules requested on command line */
1652
1653 for (lac = ac, lav = av; lac != 0; lac--) {
1654 /* convert command line rule # */
1655 rnum = strtoul(*lav++, &endptr, 10);
1656 if (*endptr) {
1657 exitval = EX_USAGE;
1658 warnx("invalid rule number: %s", *(lav - 1));
1659 continue;
1660 }
1661 for (n = seen = 0, r = data; n < nstat;
1662 n++, r = (void *)r + IOC_RULESIZE(r) ) {
1663 if (r->rulenum > rnum)
1664 break;
1665 if (r->rulenum == rnum) {
1666 show_ipfw(r, pcwidth, bcwidth);
1667 seen = 1;
1668 }
1669 }
1670 if (!seen) {
1671 /* give precedence to other error(s) */
1672 if (exitval == EX_OK)
1673 exitval = EX_UNAVAILABLE;
1674 warnx("rule %lu does not exist", rnum);
1675 }
1676 }
1677
1678 if (do_dynamic && ndyn) {
1679 printf("## Dynamic rules:\n");
1680 for (lac = ac, lav = av; lac != 0; lac--) {
1681 rnum = strtoul(*lav++, &endptr, 10);
1682 if (*endptr)
1683 /* already warned */
1684 continue;
1685 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1686 if (d->rulenum > rnum)
1687 break;
1688 if (d->rulenum == rnum)
1689 show_dyn_ipfw(d, pcwidth, bcwidth);
1690 }
1691 }
1692 }
1693
1694 ac = 0;
1695
1696 done:
1697 free(data);
1698
1699 if (exitval != EX_OK)
1700 exit(exitval);
1701 }
1702
1703 static void
1704 show_usage(void)
1705 {
1706 fprintf(stderr, "usage: ipfw [options]\n"
1707 " add [number] rule\n"
1708 " pipe number config [pipeconfig]\n"
1709 " queue number config [queueconfig]\n"
1710 " [pipe] flush\n"
1711 " [pipe] delete number ...\n"
1712 " [pipe] {list|show} [number ...]\n"
1713 " {zero|resetlog} [number ...]\n"
1714 "do \"ipfw -h\" or see ipfw manpage for details\n"
1715 );
1716
1717 exit(EX_USAGE);
1718 }
1719
1720 static void
1721 help(void)
1722 {
1723
1724 fprintf(stderr, "ipfw syntax summary:\n"
1725 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1726 "ipfw {pipe|queue} N config BODY\n"
1727 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1728 "\n"
1729 "RULE: [1..] [PROB] BODY\n"
1730 "RULENUM: INTEGER(1..65534)\n"
1731 "PROB: prob REAL(0..1)\n"
1732 "BODY: check-state [LOG] (no body) |\n"
1733 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1734 "ACTION: check-state | allow | count | deny | reject | skipto N |\n"
1735 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1736 "ADDR: [ MAC dst src ether_type ] \n"
1737 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1738 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n"
1739 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1740 "OPTION_LIST: OPTION [,OPTION_LIST]\n"
1741 );
1742 exit(0);
1743 }
1744
1745
1746 static int
1747 lookup_host (char *host, struct in_addr *ipaddr)
1748 {
1749 struct hostent *he;
1750
1751 if (!inet_aton(host, ipaddr)) {
1752 if ((he = gethostbyname(host)) == NULL)
1753 return(-1);
1754 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1755 }
1756 return(0);
1757 }
1758
1759 /*
1760 * fills the addr and mask fields in the instruction as appropriate from av.
1761 * Update length as appropriate.
1762 * The following formats are allowed:
1763 * any matches any IP. Actually returns an empty instruction.
1764 * me returns O_IP_*_ME
1765 * 1.2.3.4 single IP address
1766 * 1.2.3.4:5.6.7.8 address:mask
1767 * 1.2.3.4/24 address/mask
1768 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1769 */
1770 static void
1771 fill_ip(ipfw_insn_ip *cmd, char *av)
1772 {
1773 char *p = 0, md = 0;
1774 u_int32_t i;
1775
1776 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1777
1778 if (!strncmp(av, "any", strlen(av)))
1779 return;
1780
1781 if (!strncmp(av, "me", strlen(av))) {
1782 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1783 return;
1784 }
1785
1786 p = strchr(av, '/');
1787 if (!p)
1788 p = strchr(av, ':');
1789 if (p) {
1790 md = *p;
1791 *p++ = '\0';
1792 }
1793
1794 if (lookup_host(av, &cmd->addr) != 0)
1795 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1796 switch (md) {
1797 case ':':
1798 if (!inet_aton(p, &cmd->mask))
1799 errx(EX_DATAERR, "bad netmask ``%s''", p);
1800 break;
1801 case '/':
1802 i = atoi(p);
1803 if (i == 0)
1804 cmd->mask.s_addr = htonl(0);
1805 else if (i > 32)
1806 errx(EX_DATAERR, "bad width ``%s''", p);
1807 else
1808 cmd->mask.s_addr = htonl(~0 << (32 - i));
1809 break;
1810 default:
1811 cmd->mask.s_addr = htonl(~0);
1812 break;
1813 }
1814 cmd->addr.s_addr &= cmd->mask.s_addr;
1815 /*
1816 * now look if we have a set of addresses. They are stored as follows:
1817 * arg1 is the set size (powers of 2, 2..256)
1818 * addr is the base address IN HOST FORMAT
1819 * mask.. is an array of u_int32_t with bits set.
1820 */
1821 if (p)
1822 p = strchr(p, '{');
1823 if (p) { /* fetch addresses */
1824 u_int32_t *d;
1825 int low, high;
1826 int i = contigmask((u_char *)&(cmd->mask), 32);
1827
1828 if (i < 24 || i > 31) {
1829 fprintf(stderr, "invalid set with mask %d\n",
1830 i);
1831 exit(0);
1832 }
1833 cmd->o.arg1 = 1<<(32-i);
1834 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1835 d = (u_int32_t *)&cmd->mask;
1836 cmd->o.opcode = O_IP_DST_SET; /* default */
1837 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1838 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
1839 d[i] = 0; /* clear masks */
1840
1841 av = p+1;
1842 low = cmd->addr.s_addr & 0xff;
1843 high = low + cmd->o.arg1 - 1;
1844 while (isdigit(*av)) {
1845 char *s;
1846 u_int16_t a = strtol(av, &s, 0);
1847
1848 if (s == av) /* no parameter */
1849 break;
1850 if (a < low || a > high) {
1851 fprintf(stderr, "addr %d out of range [%d-%d]\n",
1852 a, low, high);
1853 exit(0);
1854 }
1855 a -= low;
1856 d[ a/32] |= 1<<(a & 31);
1857 if (*s != ',')
1858 break;
1859 av = s+1;
1860 }
1861 return;
1862 }
1863
1864 if (cmd->mask.s_addr == 0) { /* any */
1865 if (cmd->o.len & F_NOT)
1866 errx(EX_DATAERR, "not any never matches");
1867 else /* useless, nuke it */
1868 return;
1869 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */
1870 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1871 else /* addr/mask */
1872 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1873 }
1874
1875
1876 /*
1877 * helper function to process a set of flags and set bits in the
1878 * appropriate masks.
1879 */
1880 static void
1881 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1882 struct _s_x *flags, char *p)
1883 {
1884 u_int8_t set=0, clear=0;
1885
1886 while (p && *p) {
1887 char *q; /* points to the separator */
1888 int val;
1889 u_int8_t *which; /* mask we are working on */
1890
1891 if (*p == '!') {
1892 p++;
1893 which = &clear;
1894 } else
1895 which = &set;
1896 q = strchr(p, ',');
1897 if (q)
1898 *q++ = '\0';
1899 val = match_token(flags, p);
1900 if (val <= 0)
1901 errx(EX_DATAERR, "invalid flag %s", p);
1902 *which |= (u_int8_t)val;
1903 p = q;
1904 }
1905 cmd->opcode = opcode;
1906 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
1907 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1908 }
1909
1910
1911 static void
1912 delete(int ac, char *av[])
1913 {
1914 u_int32_t rulenum;
1915 struct dn_ioc_pipe pipe;
1916 int i;
1917 int exitval = EX_OK;
1918 int do_set = 0;
1919
1920 memset(&pipe, 0, sizeof pipe);
1921
1922 av++; ac--;
1923 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1924 do_set = 1; /* delete set */
1925 ac--; av++;
1926 }
1927
1928 /* Rule number */
1929 while (ac && isdigit(**av)) {
1930 i = atoi(*av); av++; ac--;
1931 if (do_pipe) {
1932 if (do_pipe == 1)
1933 pipe.pipe_nr = i;
1934 else
1935 pipe.fs.fs_nr = i;
1936 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1937 &pipe, sizeof pipe);
1938 if (i) {
1939 exitval = 1;
1940 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1941 do_pipe == 1 ? pipe.pipe_nr :
1942 pipe.fs.fs_nr);
1943 }
1944 } else {
1945 rulenum = (i & 0xffff) | (do_set << 24);
1946 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1947 sizeof rulenum);
1948 if (i) {
1949 exitval = EX_UNAVAILABLE;
1950 warn("rule %u: setsockopt(IP_FW_DEL)",
1951 rulenum);
1952 }
1953 }
1954 }
1955 if (exitval != EX_OK)
1956 exit(exitval);
1957 }
1958
1959
1960 /*
1961 * fill the interface structure. We do not check the name as we can
1962 * create interfaces dynamically, so checking them at insert time
1963 * makes relatively little sense.
1964 * Interface names containing '*', '?', or '[' are assumed to be shell
1965 * patterns which match interfaces.
1966 */
1967 static void
1968 fill_iface(ipfw_insn_if *cmd, char *arg)
1969 {
1970 cmd->name[0] = '\0';
1971 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
1972
1973 /* Parse the interface or address */
1974 if (!strcmp(arg, "any"))
1975 cmd->o.len = 0; /* effectively ignore this command */
1976 else if (!isdigit(*arg)) {
1977 strlcpy(cmd->name, arg, sizeof(cmd->name));
1978 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
1979 } else if (!inet_aton(arg, &cmd->p.ip))
1980 errx(EX_DATAERR, "bad ip address ``%s''", arg);
1981 }
1982
1983 static unsigned long
1984 getbw(const char *str, u_short *flags, int kb)
1985 {
1986 char *end;
1987 unsigned long val;
1988 int inbytes = 0;
1989
1990 val = strtoul(str, &end, 0);
1991 if (*end == 'k' || *end == 'K') {
1992 ++end;
1993 val *= kb;
1994 } else if (*end == 'm' || *end == 'M') {
1995 ++end;
1996 val *= kb * kb;
1997 }
1998
1999 /*
2000 * Deal with bits or bytes or b(bits) or B(bytes). If there is no
2001 * trailer assume bits.
2002 */
2003 if (strncasecmp(end, "bit", 3) == 0) {
2004 ;
2005 } else if (strncasecmp(end, "byte", 4) == 0) {
2006 inbytes = 1;
2007 } else if (*end == 'b') {
2008 ;
2009 } else if (*end == 'B') {
2010 inbytes = 1;
2011 }
2012
2013 /*
2014 * Return in bits if flags is NULL, else flag bits
2015 * or bytes in flags and return the unconverted value.
2016 */
2017 if (inbytes && flags)
2018 *flags |= DN_QSIZE_IS_BYTES;
2019 else if (inbytes && flags == NULL)
2020 val *= 8;
2021 return(val);
2022 }
2023
2024 /*
2025 * the following macro returns an error message if we run out of
2026 * arguments.
2027 */
2028 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
2029
2030 static void
2031 config_pipe(int ac, char **av)
2032 {
2033 struct dn_ioc_pipe pipe;
2034 int i;
2035 char *end;
2036 u_int32_t a;
2037 void *par = NULL;
2038
2039 memset(&pipe, 0, sizeof pipe);
2040
2041 av++; ac--;
2042 /* Pipe number */
2043 if (ac && isdigit(**av)) {
2044 i = atoi(*av); av++; ac--;
2045 if (do_pipe == 1)
2046 pipe.pipe_nr = i;
2047 else
2048 pipe.fs.fs_nr = i;
2049 }
2050 while (ac > 0) {
2051 double d;
2052 int tok = match_token(dummynet_params, *av);
2053 ac--; av++;
2054
2055 switch(tok) {
2056 case TOK_NOERROR:
2057 pipe.fs.flags_fs |= DN_NOERROR;
2058 break;
2059
2060 case TOK_PLR:
2061 NEED1("plr needs argument 0..1\n");
2062 d = strtod(av[0], NULL);
2063 if (d > 1)
2064 d = 1;
2065 else if (d < 0)
2066 d = 0;
2067 pipe.fs.plr = (int)(d*0x7fffffff);
2068 ac--; av++;
2069 break;
2070
2071 case TOK_QUEUE:
2072 NEED1("queue needs queue size\n");
2073 end = NULL;
2074 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2075 ac--; av++;
2076 break;
2077
2078 case TOK_BUCKETS:
2079 NEED1("buckets needs argument\n");
2080 pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2081 ac--; av++;
2082 break;
2083
2084 case TOK_MASK:
2085 NEED1("mask needs mask specifier\n");
2086 /*
2087 * per-flow queue, mask is dst_ip, dst_port,
2088 * src_ip, src_port, proto measured in bits
2089 */
2090 par = NULL;
2091
2092 pipe.fs.flow_mask.type = ETHERTYPE_IP;
2093 pipe.fs.flow_mask.u.ip.dst_ip = 0;
2094 pipe.fs.flow_mask.u.ip.src_ip = 0;
2095 pipe.fs.flow_mask.u.ip.dst_port = 0;
2096 pipe.fs.flow_mask.u.ip.src_port = 0;
2097 pipe.fs.flow_mask.u.ip.proto = 0;
2098 end = NULL;
2099
2100 while (ac >= 1) {
2101 u_int32_t *p32 = NULL;
2102 u_int16_t *p16 = NULL;
2103
2104 tok = match_token(dummynet_params, *av);
2105 ac--; av++;
2106 switch(tok) {
2107 case TOK_ALL:
2108 /*
2109 * special case, all bits significant
2110 */
2111 pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2112 pipe.fs.flow_mask.u.ip.src_ip = ~0;
2113 pipe.fs.flow_mask.u.ip.dst_port = ~0;
2114 pipe.fs.flow_mask.u.ip.src_port = ~0;
2115 pipe.fs.flow_mask.u.ip.proto = ~0;
2116 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2117 goto end_mask;
2118
2119 case TOK_DSTIP:
2120 p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2121 break;
2122
2123 case TOK_SRCIP:
2124 p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2125 break;
2126
2127 case TOK_DSTPORT:
2128 p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2129 break;
2130
2131 case TOK_SRCPORT:
2132 p16 = &pipe.fs.flow_mask.u.ip.src_port;
2133 break;
2134
2135 case TOK_PROTO:
2136 break;
2137
2138 default:
2139 ac++; av--; /* backtrack */
2140 goto end_mask;
2141 }
2142 if (ac < 1)
2143 errx(EX_USAGE, "mask: value missing");
2144 if (*av[0] == '/') {
2145 a = strtoul(av[0]+1, &end, 0);
2146 a = (a == 32) ? ~0 : (1 << a) - 1;
2147 } else
2148 a = strtoul(av[0], &end, 0);
2149 if (p32 != NULL)
2150 *p32 = a;
2151 else if (p16 != NULL) {
2152 if (a > 65535)
2153 errx(EX_DATAERR,
2154 "mask: must be 16 bit");
2155 *p16 = (u_int16_t)a;
2156 } else {
2157 if (a > 255)
2158 errx(EX_DATAERR,
2159 "mask: must be 8 bit");
2160 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2161 }
2162 if (a != 0)
2163 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2164 ac--; av++;
2165 } /* end while, config masks */
2166 end_mask:
2167 break;
2168
2169 case TOK_RED:
2170 case TOK_GRED:
2171 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2172 pipe.fs.flags_fs |= DN_IS_RED;
2173 if (tok == TOK_GRED)
2174 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2175 /*
2176 * the format for parameters is w_q/min_th/max_th/max_p
2177 */
2178 if ((end = strsep(&av[0], "/"))) {
2179 double w_q = strtod(end, NULL);
2180 if (w_q > 1 || w_q <= 0)
2181 errx(EX_DATAERR, "0 < w_q <= 1");
2182 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2183 }
2184 if ((end = strsep(&av[0], "/"))) {
2185 pipe.fs.min_th = strtoul(end, &end, 0);
2186 if (*end == 'K' || *end == 'k')
2187 pipe.fs.min_th *= 1024;
2188 }
2189 if ((end = strsep(&av[0], "/"))) {
2190 pipe.fs.max_th = strtoul(end, &end, 0);
2191 if (*end == 'K' || *end == 'k')
2192 pipe.fs.max_th *= 1024;
2193 }
2194 if ((end = strsep(&av[0], "/"))) {
2195 double max_p = strtod(end, NULL);
2196 if (max_p > 1 || max_p <= 0)
2197 errx(EX_DATAERR, "0 < max_p <= 1");
2198 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2199 }
2200 ac--; av++;
2201 break;
2202
2203 case TOK_DROPTAIL:
2204 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2205 break;
2206
2207 case TOK_BW:
2208 NEED1("bw needs bandwidth\n");
2209 if (do_pipe != 1)
2210 errx(EX_DATAERR, "bandwidth only valid for pipes");
2211 /*
2212 * set bandwidth value
2213 */
2214 pipe.bandwidth = getbw(av[0], NULL, 1000);
2215 if (pipe.bandwidth < 0)
2216 errx(EX_DATAERR, "bandwidth too large");
2217 ac--; av++;
2218 break;
2219
2220 case TOK_DELAY:
2221 if (do_pipe != 1)
2222 errx(EX_DATAERR, "delay only valid for pipes");
2223 NEED1("delay needs argument 0..10000ms\n");
2224 pipe.delay = strtoul(av[0], NULL, 0);
2225 ac--; av++;
2226 break;
2227
2228 case TOK_WEIGHT:
2229 if (do_pipe == 1)
2230 errx(EX_DATAERR,"weight only valid for queues");
2231 NEED1("weight needs argument 0..100\n");
2232 pipe.fs.weight = strtoul(av[0], &end, 0);
2233 ac--; av++;
2234 break;
2235
2236 case TOK_PIPE:
2237 if (do_pipe == 1)
2238 errx(EX_DATAERR,"pipe only valid for queues");
2239 NEED1("pipe needs pipe_number\n");
2240 pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2241 ac--; av++;
2242 break;
2243
2244 default:
2245 errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2246 }
2247 }
2248 if (do_pipe == 1) {
2249 if (pipe.pipe_nr == 0)
2250 errx(EX_DATAERR, "pipe_nr must be > 0");
2251 if (pipe.delay > 10000)
2252 errx(EX_DATAERR, "delay must be < 10000");
2253 } else { /* do_pipe == 2, queue */
2254 if (pipe.fs.parent_nr == 0)
2255 errx(EX_DATAERR, "pipe must be > 0");
2256 if (pipe.fs.weight >100)
2257 errx(EX_DATAERR, "weight must be <= 100");
2258 }
2259 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2260 if (pipe.fs.qsize > 1024*1024)
2261 errx(EX_DATAERR, "queue size must be < 1MB");
2262 } else {
2263 if (pipe.fs.qsize > 100)
2264 errx(EX_DATAERR, "2 <= queue size <= 100");
2265 }
2266 if (pipe.fs.flags_fs & DN_IS_RED) {
2267 size_t len;
2268 int lookup_depth, avg_pkt_size;
2269 double s, idle, weight, w_q;
2270 int clock_hz;
2271 int t;
2272
2273 if (pipe.fs.min_th >= pipe.fs.max_th)
2274 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2275 pipe.fs.min_th, pipe.fs.max_th);
2276 if (pipe.fs.max_th == 0)
2277 errx(EX_DATAERR, "max_th must be > 0");
2278
2279 len = sizeof(int);
2280 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2281 &lookup_depth, &len, NULL, 0) == -1)
2282
2283 errx(1, "sysctlbyname(\"%s\")",
2284 "net.inet.ip.dummynet.red_lookup_depth");
2285 if (lookup_depth == 0)
2286 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2287 " must be greater than zero");
2288
2289 len = sizeof(int);
2290 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2291 &avg_pkt_size, &len, NULL, 0) == -1)
2292
2293 errx(1, "sysctlbyname(\"%s\")",
2294 "net.inet.ip.dummynet.red_avg_pkt_size");
2295 if (avg_pkt_size == 0)
2296 errx(EX_DATAERR,
2297 "net.inet.ip.dummynet.red_avg_pkt_size must"
2298 " be greater than zero");
2299
2300 len = sizeof(clock_hz);
2301 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2302 NULL, 0) == -1) {
2303 errx(1, "sysctlbyname(\"%s\")",
2304 "net.inet.ip.dummynet.hz");
2305 }
2306
2307 /*
2308 * Ticks needed for sending a medium-sized packet.
2309 * Unfortunately, when we are configuring a WF2Q+ queue, we
2310 * do not have bandwidth information, because that is stored
2311 * in the parent pipe, and also we have multiple queues
2312 * competing for it. So we set s=0, which is not very
2313 * correct. But on the other hand, why do we want RED with
2314 * WF2Q+ ?
2315 */
2316 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2317 s = 0;
2318 else
2319 s = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2320
2321 /*
2322 * max idle time (in ticks) before avg queue size becomes 0.
2323 * NOTA: (3/w_q) is approx the value x so that
2324 * (1-w_q)^x < 10^-3.
2325 */
2326 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2327 idle = s * 3. / w_q;
2328 pipe.fs.lookup_step = (int)idle / lookup_depth;
2329 if (!pipe.fs.lookup_step)
2330 pipe.fs.lookup_step = 1;
2331 weight = 1 - w_q;
2332 for (t = pipe.fs.lookup_step; t > 0; --t)
2333 weight *= weight;
2334 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2335 }
2336 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2337 sizeof pipe);
2338 if (i)
2339 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2340 }
2341
2342 static void
2343 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2344 {
2345 int i, l;
2346
2347 for (i=0; i<6; i++)
2348 addr[i] = mask[i] = 0;
2349 if (!strcmp(p, "any"))
2350 return;
2351
2352 for (i=0; *p && i<6;i++, p++) {
2353 addr[i] = strtol(p, &p, 16);
2354 if (*p != ':') /* we start with the mask */
2355 break;
2356 }
2357 if (*p == '/') { /* mask len */
2358 l = strtol(p+1, &p, 0);
2359 for (i=0; l>0; l -=8, i++)
2360 mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2361 } else if (*p == '&') { /* mask */
2362 for (i=0, p++; *p && i<6;i++, p++) {
2363 mask[i] = strtol(p, &p, 16);
2364 if (*p != ':')
2365 break;
2366 }
2367 } else if (*p == '\0') {
2368 for (i=0; i<6; i++)
2369 mask[i] = 0xff;
2370 }
2371 for (i=0; i<6; i++)
2372 addr[i] &= mask[i];
2373 }
2374
2375 /*
2376 * helper function, updates the pointer to cmd with the length
2377 * of the current command, and also cleans up the first word of
2378 * the new command in case it has been clobbered before.
2379 */
2380 static ipfw_insn *
2381 next_cmd(ipfw_insn *cmd)
2382 {
2383 cmd += F_LEN(cmd);
2384 bzero(cmd, sizeof(*cmd));
2385 return cmd;
2386 }
2387
2388 /*
2389 * A function to fill simple commands of size 1.
2390 * Existing flags are preserved.
2391 */
2392 static void
2393 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2394 {
2395 cmd->opcode = opcode;
2396 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2397 cmd->arg1 = arg;
2398 }
2399
2400 /*
2401 * Fetch and add the MAC address and type, with masks. This generates one or
2402 * two microinstructions, and returns the pointer to the last one.
2403 */
2404 static ipfw_insn *
2405 add_mac(ipfw_insn *cmd, int ac, char *av[])
2406 {
2407 ipfw_insn_mac *mac;
2408
2409 if (ac < 2)
2410 errx(EX_DATAERR, "MAC dst src");
2411
2412 cmd->opcode = O_MACADDR2;
2413 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2414
2415 mac = (ipfw_insn_mac *)cmd;
2416 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2417 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2418 return cmd;
2419 }
2420
2421 static ipfw_insn *
2422 add_mactype(ipfw_insn *cmd, int ac, char *av)
2423 {
2424 if (ac < 1)
2425 errx(EX_DATAERR, "missing MAC type");
2426 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2427 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2428 cmd->opcode = O_MAC_TYPE;
2429 return cmd;
2430 } else
2431 return NULL;
2432 }
2433
2434 static ipfw_insn *
2435 add_proto(ipfw_insn *cmd, char *av)
2436 {
2437 struct protoent *pe;
2438 u_char proto = 0;
2439
2440 if (!strncmp(av, "all", strlen(av)))
2441 ; /* same as "ip" */
2442 else if ((proto = atoi(av)) > 0)
2443 ; /* all done! */
2444 else if ((pe = getprotobyname(av)) != NULL)
2445 proto = pe->p_proto;
2446 else
2447 return NULL;
2448 if (proto != IPPROTO_IP)
2449 fill_cmd(cmd, O_PROTO, 0, proto);
2450 return cmd;
2451 }
2452
2453 static ipfw_insn *
2454 add_srcip(ipfw_insn *cmd, char *av)
2455 {
2456 fill_ip((ipfw_insn_ip *)cmd, av);
2457 if (cmd->opcode == O_IP_DST_SET) /* set */
2458 cmd->opcode = O_IP_SRC_SET;
2459 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2460 cmd->opcode = O_IP_SRC_ME;
2461 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2462 cmd->opcode = O_IP_SRC;
2463 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2464 cmd->opcode = O_IP_SRC_MASK;
2465 return cmd;
2466 }
2467
2468 static ipfw_insn *
2469 add_dstip(ipfw_insn *cmd, char *av)
2470 {
2471 fill_ip((ipfw_insn_ip *)cmd, av);
2472 if (cmd->opcode == O_IP_DST_SET) /* set */
2473 ;
2474 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2475 cmd->opcode = O_IP_DST_ME;
2476 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2477 cmd->opcode = O_IP_DST;
2478 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2479 cmd->opcode = O_IP_DST_MASK;
2480 return cmd;
2481 }
2482
2483 static ipfw_insn *
2484 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2485 {
2486 if (!strncmp(av, "any", strlen(av))) {
2487 return NULL;
2488 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2489 /* XXX todo: check that we have a protocol with ports */
2490 cmd->opcode = opcode;
2491 return cmd;
2492 }
2493 return NULL;
2494 }
2495
2496 /*
2497 * Parse arguments and assemble the microinstructions which make up a rule.
2498 * Rules are added into the 'rulebuf' and then copied in the correct order
2499 * into the actual rule.
2500 *
2501 * The syntax for a rule starts with the action, followed by an
2502 * optional log action, and the various match patterns.
2503 * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2504 * (generated if the rule includes a keep-state option), then the
2505 * various match patterns, the "log" action, and the actual action.
2506 *
2507 */
2508 static void
2509 add(int ac, char *av[])
2510 {
2511 /*
2512 * rules are added into the 'rulebuf' and then copied in
2513 * the correct order into the actual rule.
2514 * Some things that need to go out of order (prob, action etc.)
2515 * go into actbuf[].
2516 */
2517 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2518 static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2519 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2520
2521 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2522 ipfw_insn *first_cmd; /* first match pattern */
2523
2524 struct ipfw_ioc_rule *rule;
2525
2526 /*
2527 * various flags used to record that we entered some fields.
2528 */
2529 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2530
2531 int i;
2532
2533 int open_par = 0; /* open parenthesis ( */
2534
2535 /* proto is here because it is used to fetch ports */
2536 u_char proto = IPPROTO_IP; /* default protocol */
2537
2538 double match_prob = 1; /* match probability, default is always match */
2539
2540 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2541 bzero(cmdbuf, sizeof(cmdbuf));
2542 bzero(rulebuf, sizeof(rulebuf));
2543
2544 rule = (struct ipfw_ioc_rule *)rulebuf;
2545 cmd = (ipfw_insn *)cmdbuf;
2546 action = (ipfw_insn *)actbuf;
2547
2548 av++; ac--;
2549
2550 /* [rule N] -- Rule number optional */
2551 if (ac && isdigit(**av)) {
2552 rule->rulenum = atoi(*av);
2553 av++;
2554 ac--;
2555 }
2556
2557 /* [set N] -- set number (0..30), optional */
2558 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2559 int set = strtoul(av[1], NULL, 10);
2560 if (set < 0 || set > 30)
2561 errx(EX_DATAERR, "illegal set %s", av[1]);
2562 rule->set = set;
2563 av += 2; ac -= 2;
2564 }
2565
2566 /* [prob D] -- match probability, optional */
2567 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2568 match_prob = strtod(av[1], NULL);
2569
2570 if (match_prob <= 0 || match_prob > 1)
2571 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2572 av += 2; ac -= 2;
2573 }
2574
2575 /* action -- mandatory */
2576 NEED1("missing action");
2577 i = match_token(rule_actions, *av);
2578 ac--; av++;
2579 action->len = 1; /* default */
2580 switch(i) {
2581 case TOK_CHECKSTATE:
2582 have_state = action;
2583 action->opcode = O_CHECK_STATE;
2584 break;
2585
2586 case TOK_ACCEPT:
2587 action->opcode = O_ACCEPT;
2588 break;
2589
2590 case TOK_DENY:
2591 action->opcode = O_DENY;
2592 action->arg1 = 0;
2593 break;
2594
2595 case TOK_REJECT:
2596 action->opcode = O_REJECT;
2597 action->arg1 = ICMP_UNREACH_HOST;
2598 break;
2599
2600 case TOK_RESET:
2601 action->opcode = O_REJECT;
2602 action->arg1 = ICMP_REJECT_RST;
2603 break;
2604
2605 case TOK_UNREACH:
2606 action->opcode = O_REJECT;
2607 NEED1("missing reject code");
2608 fill_reject_code(&action->arg1, *av);
2609 ac--; av++;
2610 break;
2611
2612 case TOK_COUNT:
2613 action->opcode = O_COUNT;
2614 break;
2615
2616 case TOK_QUEUE:
2617 case TOK_PIPE:
2618 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2619 case TOK_SKIPTO:
2620 if (i == TOK_QUEUE)
2621 action->opcode = O_QUEUE;
2622 else if (i == TOK_PIPE)
2623 action->opcode = O_PIPE;
2624 else if (i == TOK_SKIPTO)
2625 action->opcode = O_SKIPTO;
2626 NEED1("missing skipto/pipe/queue number");
2627 action->arg1 = strtoul(*av, NULL, 10);
2628 av++; ac--;
2629 break;
2630
2631 case TOK_DIVERT:
2632 case TOK_TEE:
2633 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2634 NEED1("missing divert/tee port");
2635 action->arg1 = strtoul(*av, NULL, 0);
2636 if (action->arg1 == 0) {
2637 struct servent *s;
2638 setservent(1);
2639 s = getservbyname(av[0], "divert");
2640 if (s != NULL)
2641 action->arg1 = ntohs(s->s_port);
2642 else
2643 errx(EX_DATAERR, "illegal divert/tee port");
2644 }
2645 ac--; av++;
2646 break;
2647
2648 case TOK_FORWARD: {
2649 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2650 char *s, *end;
2651
2652 NEED1("missing forward address[:port]");
2653
2654 action->opcode = O_FORWARD_IP;
2655 action->len = F_INSN_SIZE(ipfw_insn_sa);
2656
2657 p->sa.sin_len = sizeof(struct sockaddr_in);
2658 p->sa.sin_family = AF_INET;
2659 p->sa.sin_port = 0;
2660 /*
2661 * locate the address-port separator (':' or ',')
2662 */
2663 s = strchr(*av, ':');
2664 if (s == NULL)
2665 s = strchr(*av, ',');
2666 if (s != NULL) {
2667 *(s++) = '\0';
2668 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2669 if (s == end)
2670 errx(EX_DATAERR,
2671 "illegal forwarding port ``%s''", s);
2672 p->sa.sin_port = (u_short)i;
2673 }
2674 lookup_host(*av, &(p->sa.sin_addr));
2675 }
2676 ac--; av++;
2677 break;
2678
2679 default:
2680 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2681 }
2682 action = next_cmd(action);
2683
2684 /*
2685 * [log [logamount N]] -- log, optional
2686 *
2687 * If exists, it goes first in the cmdbuf, but then it is
2688 * skipped in the copy section to the end of the buffer.
2689 */
2690 if (ac && !strncmp(*av, "log", strlen(*av))) {
2691 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2692
2693 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2694 cmd->opcode = O_LOG;
2695 av++; ac--;
2696 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2697 ac--; av++;
2698 NEED1("logamount requires argument");
2699 c->max_log = atoi(*av);
2700 if (c->max_log < 0)
2701 errx(EX_DATAERR, "logamount must be positive");
2702 ac--; av++;
2703 }
2704 cmd = next_cmd(cmd);
2705 }
2706
2707 if (have_state) /* must be a check-state, we are done */
2708 goto done;
2709
2710 #define OR_START(target) \
2711 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2712 if (open_par) \
2713 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2714 prev = NULL; \
2715 open_par = 1; \
2716 if ( (av[0])[1] == '\0') { \
2717 ac--; av++; \
2718 } else \
2719 (*av)++; \
2720 } \
2721 target: \
2722
2723
2724 #define CLOSE_PAR \
2725 if (open_par) { \
2726 if (ac && ( \
2727 !strncmp(*av, ")", strlen(*av)) || \
2728 !strncmp(*av, "}", strlen(*av)) )) { \
2729 prev = NULL; \
2730 open_par = 0; \
2731 ac--; av++; \
2732 } else \
2733 errx(EX_USAGE, "missing \")\"\n"); \
2734 }
2735
2736 #define NOT_BLOCK \
2737 if (ac && !strncmp(*av, "not", strlen(*av))) { \
2738 if (cmd->len & F_NOT) \
2739 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2740 cmd->len |= F_NOT; \
2741 ac--; av++; \
2742 }
2743
2744 #define OR_BLOCK(target) \
2745 if (ac && !strncmp(*av, "or", strlen(*av))) { \
2746 if (prev == NULL || open_par == 0) \
2747 errx(EX_DATAERR, "invalid OR block"); \
2748 prev->len |= F_OR; \
2749 ac--; av++; \
2750 goto target; \
2751 } \
2752 CLOSE_PAR;
2753
2754 first_cmd = cmd;
2755
2756 #if 0
2757 /*
2758 * MAC addresses, optional.
2759 * If we have this, we skip the part "proto from src to dst"
2760 * and jump straight to the option parsing.
2761 */
2762 NOT_BLOCK;
2763 NEED1("missing protocol");
2764 if (!strncmp(*av, "MAC", strlen(*av)) ||
2765 !strncmp(*av, "mac", strlen(*av))) {
2766 ac--; av++; /* the "MAC" keyword */
2767 add_mac(cmd, ac, av); /* exits in case of errors */
2768 cmd = next_cmd(cmd);
2769 ac -= 2; av += 2; /* dst-mac and src-mac */
2770 NOT_BLOCK;
2771 NEED1("missing mac type");
2772 if (add_mactype(cmd, ac, av[0]))
2773 cmd = next_cmd(cmd);
2774 ac--; av++; /* any or mac-type */
2775 goto read_options;
2776 }
2777 #endif
2778
2779 /*
2780 * protocol, mandatory
2781 */
2782 OR_START(get_proto);
2783 NOT_BLOCK;
2784 NEED1("missing protocol");
2785 if (add_proto(cmd, *av)) {
2786 av++; ac--;
2787 if (F_LEN(cmd) == 0) /* plain IP */
2788 proto = 0;
2789 else {
2790 proto = cmd->arg1;
2791 prev = cmd;
2792 cmd = next_cmd(cmd);
2793 }
2794 } else if (first_cmd != cmd) {
2795 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2796 } else
2797 goto read_options;
2798 OR_BLOCK(get_proto);
2799
2800 /*
2801 * "from", mandatory
2802 */
2803 if (!ac || strncmp(*av, "from", strlen(*av)))
2804 errx(EX_USAGE, "missing ``from''");
2805 ac--; av++;
2806
2807 /*
2808 * source IP, mandatory
2809 */
2810 OR_START(source_ip);
2811 NOT_BLOCK; /* optional "not" */
2812 NEED1("missing source address");
2813 if (add_srcip(cmd, *av)) {
2814 ac--; av++;
2815 if (F_LEN(cmd) != 0) { /* ! any */
2816 prev = cmd;
2817 cmd = next_cmd(cmd);
2818 }
2819 }
2820 OR_BLOCK(source_ip);
2821
2822 /*
2823 * source ports, optional
2824 */
2825 NOT_BLOCK; /* optional "not" */
2826 if (ac) {
2827 if (!strncmp(*av, "any", strlen(*av)) ||
2828 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2829 ac--; av++;
2830 if (F_LEN(cmd) != 0)
2831 cmd = next_cmd(cmd);
2832 }
2833 }
2834
2835 /*
2836 * "to", mandatory
2837 */
2838 if (!ac || strncmp(*av, "to", strlen(*av)))
2839 errx(EX_USAGE, "missing ``to''");
2840 av++; ac--;
2841
2842 /*
2843 * destination, mandatory
2844 */
2845 OR_START(dest_ip);
2846 NOT_BLOCK; /* optional "not" */
2847 NEED1("missing dst address");
2848 if (add_dstip(cmd, *av)) {
2849 ac--; av++;
2850 if (F_LEN(cmd) != 0) { /* ! any */
2851 prev = cmd;
2852 cmd = next_cmd(cmd);
2853 }
2854 }
2855 OR_BLOCK(dest_ip);
2856
2857 /*
2858 * dest. ports, optional
2859 */
2860 NOT_BLOCK; /* optional "not" */
2861 if (ac) {
2862 if (!strncmp(*av, "any", strlen(*av)) ||
2863 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2864 ac--; av++;
2865 if (F_LEN(cmd) != 0)
2866 cmd = next_cmd(cmd);
2867 }
2868 }
2869
2870 read_options:
2871 if (ac && first_cmd == cmd) {
2872 /*
2873 * nothing specified so far, store in the rule to ease
2874 * printout later.
2875 */
2876 rule->usr_flags = IPFW_USR_F_NORULE;
2877 }
2878 prev = NULL;
2879 while (ac) {
2880 char *s;
2881 ipfw_insn_u32 *cmd32; /* alias for cmd */
2882
2883 s = *av;
2884 cmd32 = (ipfw_insn_u32 *)cmd;
2885
2886 if (*s == '!') { /* alternate syntax for NOT */
2887 if (cmd->len & F_NOT)
2888 errx(EX_USAGE, "double \"not\" not allowed\n");
2889 cmd->len = F_NOT;
2890 s++;
2891 }
2892 i = match_token(rule_options, s);
2893 ac--; av++;
2894 switch(i) {
2895 case TOK_NOT:
2896 if (cmd->len & F_NOT)
2897 errx(EX_USAGE, "double \"not\" not allowed\n");
2898 cmd->len = F_NOT;
2899 break;
2900
2901 case TOK_OR:
2902 if (open_par == 0 || prev == NULL)
2903 errx(EX_USAGE, "invalid \"or\" block\n");
2904 prev->len |= F_OR;
2905 break;
2906
2907 case TOK_STARTBRACE:
2908 if (open_par)
2909 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2910 open_par = 1;
2911 break;
2912
2913 case TOK_ENDBRACE:
2914 if (!open_par)
2915 errx(EX_USAGE, "+missing \")\"\n");
2916 open_par = 0;
2917 prev = NULL;
2918 break;
2919
2920 case TOK_IN:
2921 fill_cmd(cmd, O_IN, 0, 0);
2922 break;
2923
2924 case TOK_OUT:
2925 cmd->len ^= F_NOT; /* toggle F_NOT */
2926 fill_cmd(cmd, O_IN, 0, 0);
2927 break;
2928
2929 case TOK_FRAG:
2930 fill_cmd(cmd, O_FRAG, 0, 0);
2931 break;
2932
2933 case TOK_LAYER2:
2934 fill_cmd(cmd, O_LAYER2, 0, 0);
2935 break;
2936
2937 case TOK_XMIT:
2938 case TOK_RECV:
2939 case TOK_VIA:
2940 NEED1("recv, xmit, via require interface name"
2941 " or address");
2942 fill_iface((ipfw_insn_if *)cmd, av[0]);
2943 ac--; av++;
2944 if (F_LEN(cmd) == 0) /* not a valid address */
2945 break;
2946 if (i == TOK_XMIT)
2947 cmd->opcode = O_XMIT;
2948 else if (i == TOK_RECV)
2949 cmd->opcode = O_RECV;
2950 else if (i == TOK_VIA)
2951 cmd->opcode = O_VIA;
2952 break;
2953
2954 case TOK_ICMPTYPES:
2955 NEED1("icmptypes requires list of types");
2956 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
2957 av++; ac--;
2958 break;
2959
2960 case TOK_IPTTL:
2961 NEED1("ipttl requires TTL");
2962 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
2963 ac--; av++;
2964 break;
2965
2966 case TOK_IPID:
2967 NEED1("ipid requires length");
2968 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
2969 ac--; av++;
2970 break;
2971
2972 case TOK_IPLEN:
2973 NEED1("iplen requires length");
2974 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
2975 ac--; av++;
2976 break;
2977
2978 case TOK_IPVER:
2979 NEED1("ipver requires version");
2980 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
2981 ac--; av++;
2982 break;
2983
2984 case TOK_IPPRECEDENCE:
2985 NEED1("ipprecedence requires value");
2986 fill_cmd(cmd, O_IPPRECEDENCE, 0,
2987 (strtoul(*av, NULL, 0) & 7) << 5);
2988 ac--; av++;
2989 break;
2990
2991 case TOK_IPOPTS:
2992 NEED1("missing argument for ipoptions");
2993 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
2994 ac--; av++;
2995 break;
2996
2997 case TOK_IPTOS:
2998 NEED1("missing argument for iptos");
2999 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3000 ac--; av++;
3001 break;
3002
3003 case TOK_UID:
3004 NEED1("uid requires argument");
3005 {
3006 char *end;
3007 uid_t uid;
3008 struct passwd *pwd;
3009
3010 cmd->opcode = O_UID;
3011 uid = strtoul(*av, &end, 0);
3012 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3013 if (pwd == NULL)
3014 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3015 cmd32->d[0] = pwd->pw_uid;
3016 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3017 ac--; av++;
3018 }
3019 break;
3020
3021 case TOK_GID:
3022 NEED1("gid requires argument");
3023 {
3024 char *end;
3025 gid_t gid;
3026 struct group *grp;
3027
3028 cmd->opcode = O_GID;
3029 gid = strtoul(*av, &end, 0);
3030 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3031 if (grp == NULL)
3032 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3033 cmd32->d[0] = grp->gr_gid;
3034 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3035 ac--; av++;
3036 }
3037 break;
3038
3039 case TOK_ESTAB:
3040 fill_cmd(cmd, O_ESTAB, 0, 0);
3041 break;
3042
3043 case TOK_SETUP:
3044 fill_cmd(cmd, O_TCPFLAGS, 0,
3045 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3046 break;
3047
3048 case TOK_TCPOPTS:
3049 NEED1("missing argument for tcpoptions");
3050 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3051 ac--; av++;
3052 break;
3053
3054 case TOK_TCPSEQ:
3055 case TOK_TCPACK:
3056 NEED1("tcpseq/tcpack requires argument");
3057 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3058 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3059 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3060 ac--; av++;
3061 break;
3062
3063 case TOK_TCPWIN:
3064 NEED1("tcpwin requires length");
3065 fill_cmd(cmd, O_TCPWIN, 0,
3066 htons(strtoul(*av, NULL, 0)));
3067 ac--; av++;
3068 break;
3069
3070 case TOK_TCPFLAGS:
3071 NEED1("missing argument for tcpflags");
3072 cmd->opcode = O_TCPFLAGS;
3073 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3074 ac--; av++;
3075 break;
3076
3077 case TOK_KEEPSTATE:
3078 if (open_par)
3079 errx(EX_USAGE, "keep-state cannot be part "
3080 "of an or block");
3081 if (have_state)
3082 errx(EX_USAGE, "only one of keep-state "
3083 "and limit is allowed");
3084 have_state = cmd;
3085 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3086 break;
3087
3088 case TOK_LIMIT:
3089 if (open_par)
3090 errx(EX_USAGE, "limit cannot be part "
3091 "of an or block");
3092 if (have_state)
3093 errx(EX_USAGE, "only one of keep-state "
3094 "and limit is allowed");
3095 NEED1("limit needs mask and # of connections");
3096 have_state = cmd;
3097 {
3098 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3099
3100 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3101 cmd->opcode = O_LIMIT;
3102 c->limit_mask = 0;
3103 c->conn_limit = 0;
3104 for (; ac >1 ;) {
3105 int val;
3106
3107 val = match_token(limit_masks, *av);
3108 if (val <= 0)
3109 break;
3110 c->limit_mask |= val;
3111 ac--; av++;
3112 }
3113 c->conn_limit = atoi(*av);
3114 if (c->conn_limit == 0)
3115 errx(EX_USAGE, "limit: limit must be >0");
3116 if (c->limit_mask == 0)
3117 errx(EX_USAGE, "missing limit mask");
3118 ac--; av++;
3119 }
3120 break;
3121
3122 case TOK_PROTO:
3123 NEED1("missing protocol");
3124 if (add_proto(cmd, *av)) {
3125 proto = cmd->arg1;
3126 ac--; av++;
3127 } else
3128 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3129 break;
3130
3131 case TOK_SRCIP:
3132 NEED1("missing source IP");
3133 if (add_srcip(cmd, *av)) {
3134 ac--; av++;
3135 }
3136 break;
3137
3138 case TOK_DSTIP:
3139 NEED1("missing destination IP");
3140 if (add_dstip(cmd, *av)) {
3141 ac--; av++;
3142 }
3143 break;
3144
3145 case TOK_SRCPORT:
3146 NEED1("missing source port");
3147 if (!strncmp(*av, "any", strlen(*av)) ||
3148 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3149 ac--; av++;
3150 } else
3151 errx(EX_DATAERR, "invalid source port %s", *av);
3152 break;
3153
3154 case TOK_DSTPORT:
3155 NEED1("missing destination port");
3156 if (!strncmp(*av, "any", strlen(*av)) ||
3157 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3158 ac--; av++;
3159 } else
3160 errx(EX_DATAERR, "invalid destination port %s",
3161 *av);
3162 break;
3163
3164 case TOK_MAC:
3165 if (ac < 2)
3166 errx(EX_USAGE, "MAC dst-mac src-mac");
3167 if (add_mac(cmd, ac, av)) {
3168 ac -= 2; av += 2;
3169 }
3170 break;
3171
3172 case TOK_MACTYPE:
3173 NEED1("missing mac type");
3174 if (!add_mactype(cmd, ac, *av))
3175 errx(EX_DATAERR, "invalid mac type %s", *av);
3176 ac--; av++;
3177 break;
3178
3179 default:
3180 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3181 }
3182 if (F_LEN(cmd) > 0) { /* prepare to advance */
3183 prev = cmd;
3184 cmd = next_cmd(cmd);
3185 }
3186 }
3187
3188 done:
3189 /*
3190 * Now copy stuff into the rule.
3191 * If we have a keep-state option, the first instruction
3192 * must be a PROBE_STATE (which is generated here).
3193 * If we have a LOG option, it was stored as the first command,
3194 * and now must be moved to the top of the action part.
3195 */
3196 dst = (ipfw_insn *)rule->cmd;
3197
3198 /*
3199 * First thing to write into the command stream is the match probability.
3200 */
3201 if (match_prob != 1) { /* 1 means always match */
3202 dst->opcode = O_PROB;
3203 dst->len = 2;
3204 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3205 dst += dst->len;
3206 }
3207
3208 /*
3209 * generate O_PROBE_STATE if necessary
3210 */
3211 if (have_state && have_state->opcode != O_CHECK_STATE) {
3212 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3213 dst = next_cmd(dst);
3214 }
3215 /*
3216 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3217 */
3218 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3219 i = F_LEN(src);
3220
3221 switch (src->opcode) {
3222 case O_LOG:
3223 case O_KEEP_STATE:
3224 case O_LIMIT:
3225 break;
3226 default:
3227 bcopy(src, dst, i * sizeof(u_int32_t));
3228 dst += i;
3229 }
3230 }
3231
3232 /*
3233 * put back the have_state command as last opcode
3234 */
3235 if (have_state && have_state->opcode != O_CHECK_STATE) {
3236 i = F_LEN(have_state);
3237 bcopy(have_state, dst, i * sizeof(u_int32_t));
3238 dst += i;
3239 }
3240 /*
3241 * start action section
3242 */
3243 rule->act_ofs = dst - rule->cmd;
3244
3245 /*
3246 * put back O_LOG if necessary
3247 */
3248 src = (ipfw_insn *)cmdbuf;
3249 if ( src->opcode == O_LOG ) {
3250 i = F_LEN(src);
3251 bcopy(src, dst, i * sizeof(u_int32_t));
3252 dst += i;
3253 }
3254 /*
3255 * copy all other actions
3256 */
3257 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3258 i = F_LEN(src);
3259 bcopy(src, dst, i * sizeof(u_int32_t));
3260 dst += i;
3261 }
3262
3263 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3264 i = (void *)dst - (void *)rule;
3265 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3266 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3267 if (!do_quiet)
3268 show_ipfw(rule, 10, 10);
3269 }
3270
3271 static void
3272 zero(int ac, char *av[])
3273 {
3274 int rulenum;
3275 int failed = EX_OK;
3276
3277 av++; ac--;
3278
3279 if (!ac) {
3280 /* clear all entries */
3281 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3282 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3283 if (!do_quiet)
3284 printf("Accounting cleared.\n");
3285
3286 return;
3287 }
3288
3289 while (ac) {
3290 /* Rule number */
3291 if (isdigit(**av)) {
3292 rulenum = atoi(*av);
3293 av++;
3294 ac--;
3295 if (setsockopt(s, IPPROTO_IP,
3296 IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3297 warn("rule %u: setsockopt(IP_FW_ZERO)",
3298 rulenum);
3299 failed = EX_UNAVAILABLE;
3300 } else if (!do_quiet)
3301 printf("Entry %d cleared\n", rulenum);
3302 } else {
3303 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3304 }
3305 }
3306 if (failed != EX_OK)
3307 exit(failed);
3308 }
3309
3310 static void
3311 resetlog(int ac, char *av[])
3312 {
3313 int rulenum;
3314 int failed = EX_OK;
3315
3316 av++; ac--;
3317
3318 if (!ac) {
3319 /* clear all entries */
3320 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3321 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3322 if (!do_quiet)
3323 printf("Logging counts reset.\n");
3324
3325 return;
3326 }
3327
3328 while (ac) {
3329 /* Rule number */
3330 if (isdigit(**av)) {
3331 rulenum = atoi(*av);
3332 av++;
3333 ac--;
3334 if (setsockopt(s, IPPROTO_IP,
3335 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3336 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3337 rulenum);
3338 failed = EX_UNAVAILABLE;
3339 } else if (!do_quiet)
3340 printf("Entry %d logging count reset\n",
3341 rulenum);
3342 } else {
3343 errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3344 }
3345 }
3346 if (failed != EX_OK)
3347 exit(failed);
3348 }
3349
3350 static void
3351 flush(void)
3352 {
3353 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3354
3355 if (!do_force && !do_quiet) { /* need to ask user */
3356 int c;
3357
3358 printf("Are you sure? [yn] ");
3359 fflush(stdout);
3360 do {
3361 c = toupper(getc(stdin));
3362 while (c != '\n' && getc(stdin) != '\n')
3363 if (feof(stdin))
3364 return; /* and do not flush */
3365 } while (c != 'Y' && c != 'N');
3366 printf("\n");
3367 if (c == 'N') /* user said no */
3368 return;
3369 }
3370 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3371 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3372 do_pipe ? "DUMMYNET" : "FW");
3373 if (!do_quiet)
3374 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3375 }
3376
3377 static int
3378 ipfw_main(int ac, char **av)
3379 {
3380 int ch;
3381
3382 if (ac == 1)
3383 show_usage();
3384
3385 /* Set the force flag for non-interactive processes */
3386 do_force = !isatty(STDIN_FILENO);
3387
3388 optind = optreset = 1;
3389 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3390 switch (ch) {
3391 case 'h': /* help */
3392 help();
3393 break; /* NOTREACHED */
3394
3395 case 's': /* sort */
3396 do_sort = atoi(optarg);
3397 break;
3398 case 'a':
3399 do_acct = 1;
3400 break;
3401 case 'c':
3402 do_compact = 1;
3403 break;
3404 case 'd':
3405 do_dynamic = 1;
3406 break;
3407 case 'e':
3408 do_expired = 1;
3409 break;
3410 case 'f':
3411 do_force = 1;
3412 break;
3413 case 'N':
3414 do_resolv = 1;
3415 break;
3416 case 'q':
3417 do_quiet = 1;
3418 break;
3419 case 'S':
3420 show_sets = 1;
3421 break;
3422 case 't':
3423 do_time = 1;
3424 break;
3425 case 'v': /* verbose */
3426 verbose++;
3427 break;
3428 default:
3429 show_usage();
3430 }
3431
3432 ac -= optind;
3433 av += optind;
3434 NEED1("bad arguments, for usage summary ``ipfw''");
3435
3436 /*
3437 * optional: pipe or queue
3438 */
3439 if (!strncmp(*av, "pipe", strlen(*av))) {
3440 do_pipe = 1;
3441 ac--;
3442 av++;
3443 } else if (!strncmp(*av, "queue", strlen(*av))) {
3444 do_pipe = 2;
3445 ac--;
3446 av++;
3447 }
3448 NEED1("missing command");
3449
3450 /*
3451 * for pipes and queues we normally say 'pipe NN config'
3452 * but the code is easier to parse as 'pipe config NN'
3453 * so we swap the two arguments.
3454 */
3455 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') {
3456 char *p = av[0];
3457 av[0] = av[1];
3458 av[1] = p;
3459 }
3460 if (!strncmp(*av, "add", strlen(*av)))
3461 add(ac, av);
3462 else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
3463 config_pipe(ac, av);
3464 else if (!strncmp(*av, "delete", strlen(*av)))
3465 delete(ac, av);
3466 else if (!strncmp(*av, "flush", strlen(*av)))
3467 flush();
3468 else if (!strncmp(*av, "zero", strlen(*av)))
3469 zero(ac, av);
3470 else if (!strncmp(*av, "resetlog", strlen(*av)))
3471 resetlog(ac, av);
3472 else if (!strncmp(*av, "print", strlen(*av)) ||
3473 !strncmp(*av, "list", strlen(*av)))
3474 list(ac, av);
3475 else if (!strncmp(*av, "enable", strlen(*av)))
3476 sysctl_handler(ac, av, 1);
3477 else if (!strncmp(*av, "disable", strlen(*av)))
3478 sysctl_handler(ac, av, 0);
3479 else if (!strncmp(*av, "set", strlen(*av)))
3480 sets_handler(ac, av);
3481 else if (!strncmp(*av, "show", strlen(*av))) {
3482 do_acct++;
3483 list(ac, av);
3484 } else
3485 errx(EX_USAGE, "bad command `%s'", *av);
3486 return 0;
3487 }
3488
3489
3490 static void
3491 ipfw_readfile(int ac, char *av[])
3492 {
3493 #define MAX_ARGS 32
3494 #define WHITESP " \t\f\v\n\r"
3495 char buf[BUFSIZ];
3496 char *a, *p, *args[MAX_ARGS], *cmd = NULL;
3497 char linename[10];
3498 int i=0, lineno=0, qflag=0, pflag=0, status;
3499 FILE *f = NULL;
3500 pid_t preproc = 0;
3501 int c;
3502
3503 while ((c = getopt(ac, av, "D:U:p:q")) != -1)
3504 switch(c) {
3505 case 'D':
3506 if (!pflag)
3507 errx(EX_USAGE, "-D requires -p");
3508 if (i > MAX_ARGS - 2)
3509 errx(EX_USAGE,
3510 "too many -D or -U options");
3511 args[i++] = "-D";
3512 args[i++] = optarg;
3513 break;
3514
3515 case 'U':
3516 if (!pflag)
3517 errx(EX_USAGE, "-U requires -p");
3518 if (i > MAX_ARGS - 2)
3519 errx(EX_USAGE,
3520 "too many -D or -U options");
3521 args[i++] = "-U";
3522 args[i++] = optarg;
3523 break;
3524
3525 case 'p':
3526 pflag = 1;
3527 cmd = optarg;
3528 args[0] = cmd;
3529 i = 1;
3530 break;
3531
3532 case 'q':
3533 qflag = 1;
3534 break;
3535
3536 default:
3537 errx(EX_USAGE, "bad arguments, for usage"
3538 " summary ``ipfw''");
3539 }
3540
3541 av += optind;
3542 ac -= optind;
3543 if (ac != 1)
3544 errx(EX_USAGE, "extraneous filename arguments");
3545
3546 if ((f = fopen(av[0], "r")) == NULL)
3547 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
3548
3549 if (pflag) {
3550 /* pipe through preprocessor (cpp or m4) */
3551 int pipedes[2];
3552
3553 args[i] = 0;
3554
3555 if (pipe(pipedes) == -1)
3556 err(EX_OSERR, "cannot create pipe");
3557
3558 switch((preproc = fork())) {
3559 case -1:
3560 err(EX_OSERR, "cannot fork");
3561
3562 case 0:
3563 /* child */
3564 if (dup2(fileno(f), 0) == -1
3565 || dup2(pipedes[1], 1) == -1)
3566 err(EX_OSERR, "dup2()");
3567 fclose(f);
3568 close(pipedes[1]);
3569 close(pipedes[0]);
3570 execvp(cmd, args);
3571 err(EX_OSERR, "execvp(%s) failed", cmd);
3572
3573 default:
3574 /* parent */
3575 fclose(f);
3576 close(pipedes[1]);
3577 if ((f = fdopen(pipedes[0], "r")) == NULL) {
3578 int savederrno = errno;
3579
3580 kill(preproc, SIGTERM);
3581 errno = savederrno;
3582 err(EX_OSERR, "fdopen()");
3583 }
3584 }
3585 }
3586
3587 while (fgets(buf, BUFSIZ, f)) {
3588 lineno++;
3589 sprintf(linename, "Line %d", lineno);
3590 args[0] = linename;
3591
3592 if (*buf == '#')
3593 continue;
3594 if ((p = strchr(buf, '#')) != NULL)
3595 *p = '\0';
3596 i = 1;
3597 if (qflag)
3598 args[i++] = "-q";
3599 for (a = strtok(buf, WHITESP);
3600 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
3601 args[i] = a;
3602 if (i == (qflag? 2: 1))
3603 continue;
3604 if (i == MAX_ARGS)
3605 errx(EX_USAGE, "%s: too many arguments",
3606 linename);
3607 args[i] = NULL;
3608
3609 ipfw_main(i, args);
3610 }
3611 fclose(f);
3612 if (pflag) {
3613 if (waitpid(preproc, &status, 0) == -1)
3614 errx(EX_OSERR, "waitpid()");
3615 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
3616 errx(EX_UNAVAILABLE,
3617 "preprocessor exited with status %d",
3618 WEXITSTATUS(status));
3619 else if (WIFSIGNALED(status))
3620 errx(EX_UNAVAILABLE,
3621 "preprocessor exited with signal %d",
3622 WTERMSIG(status));
3623 }
3624 }
3625
3626 int
3627 main(int ac, char *av[])
3628 {
3629 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
3630 if (s < 0)
3631 err(EX_UNAVAILABLE, "socket");
3632
3633 /*
3634 * If the last argument is an absolute pathname, interpret it
3635 * as a file to be preprocessed.
3636 */
3637
3638 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
3639 ipfw_readfile(ac, av);
3640 else
3641 ipfw_main(ac, av);
3642 return EX_OK;
3643 }
DragonFly BSD