?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
kernel/nata: Extract ad_get_geometry().
[dragonfly.git] / sbin / ipfw / ipfw2.c
blob52f4c071542621fc38815ab4604a5aba1e9f2536
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 */
22
23 #include <sys/param.h>
24 #include <sys/mbuf.h>
25 #include <sys/socket.h>
26 #include <sys/sockio.h>
27 #include <sys/sysctl.h>
28 #include <sys/time.h>
29 #include <sys/wait.h>
30
31 #include <ctype.h>
32 #include <err.h>
33 #include <errno.h>
34 #include <grp.h>
35 #include <limits.h>
36 #include <netdb.h>
37 #include <pwd.h>
38 #include <signal.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <string.h>
43 #include <timeconv.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_table, /* this cmd referes to a table */
67 do_sort, /* field to sort results (0 = no) */
68 do_dynamic, /* display dynamic rules */
69 do_expired, /* display expired dynamic rules */
70 do_compact, /* show rules in compact mode */
71 show_sets, /* display rule sets */
72 verbose;
73
74 #define IP_MASK_ALL 0xffffffff
75
76 /*
77 * structure to hold flag names and associated values to be
78 * set in the appropriate masks.
79 * A NULL string terminates the array.
80 * Often, an element with 0 value contains an error string.
81 *
82 */
83 struct _s_x {
84 const char *s;
85 uint32_t x;
86 };
87
88 static struct _s_x f_tcpflags[] = {
89 { "syn", TH_SYN },
90 { "fin", TH_FIN },
91 { "ack", TH_ACK },
92 { "psh", TH_PUSH },
93 { "rst", TH_RST },
94 { "urg", TH_URG },
95 { "tcp flag", 0 },
96 { NULL, 0 }
97 };
98
99 static struct _s_x f_tcpopts[] = {
100 { "mss", IP_FW_TCPOPT_MSS },
101 { "maxseg", IP_FW_TCPOPT_MSS },
102 { "window", IP_FW_TCPOPT_WINDOW },
103 { "sack", IP_FW_TCPOPT_SACK },
104 { "ts", IP_FW_TCPOPT_TS },
105 { "timestamp", IP_FW_TCPOPT_TS },
106 { "cc", IP_FW_TCPOPT_CC },
107 { "tcp option", 0 },
108 { NULL, 0 }
109 };
110
111 /*
112 * IP options span the range 0 to 255 so we need to remap them
113 * (though in fact only the low 5 bits are significant).
114 */
115 static struct _s_x f_ipopts[] = {
116 { "ssrr", IP_FW_IPOPT_SSRR},
117 { "lsrr", IP_FW_IPOPT_LSRR},
118 { "rr", IP_FW_IPOPT_RR},
119 { "ts", IP_FW_IPOPT_TS},
120 { "ip option", 0 },
121 { NULL, 0 }
122 };
123
124 static struct _s_x f_iptos[] = {
125 { "lowdelay", IPTOS_LOWDELAY},
126 { "throughput", IPTOS_THROUGHPUT},
127 { "reliability", IPTOS_RELIABILITY},
128 { "mincost", IPTOS_MINCOST},
129 { "congestion", IPTOS_CE},
130 { "ecntransport", IPTOS_ECT},
131 { "ip tos option", 0},
132 { NULL, 0 }
133 };
134
135 static struct _s_x limit_masks[] = {
136 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
137 {"src-addr", DYN_SRC_ADDR},
138 {"src-port", DYN_SRC_PORT},
139 {"dst-addr", DYN_DST_ADDR},
140 {"dst-port", DYN_DST_PORT},
141 {NULL, 0}
142 };
143
144 /*
145 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
146 * This is only used in this code.
147 */
148 #define IPPROTO_ETHERTYPE 0x1000
149 static struct _s_x ether_types[] = {
150 /*
151 * Note, we cannot use "-:&/" in the names because they are field
152 * separators in the type specifications. Also, we use s = NULL as
153 * end-delimiter, because a type of 0 can be legal.
154 */
155 { "ip", 0x0800 },
156 { "ipv4", 0x0800 },
157 { "ipv6", 0x86dd },
158 { "arp", 0x0806 },
159 { "rarp", 0x8035 },
160 { "vlan", 0x8100 },
161 { "loop", 0x9000 },
162 { "trail", 0x1000 },
163 { "pppoe_disc", 0x8863 },
164 { "pppoe_sess", 0x8864 },
165 { "ipx_8022", 0x00E0 },
166 { "ipx_8023", 0x0000 },
167 { "ipx_ii", 0x8137 },
168 { "ipx_snap", 0x8137 },
169 { "ipx", 0x8137 },
170 { "ns", 0x0600 },
171 { NULL, 0 }
172 };
173
174 static void show_usage(void);
175
176 enum tokens {
177 TOK_NULL=0,
178
179 TOK_OR,
180 TOK_NOT,
181 TOK_STARTBRACE,
182 TOK_ENDBRACE,
183
184 TOK_ACCEPT,
185 TOK_COUNT,
186 TOK_DEFRAG,
187 TOK_PIPE,
188 TOK_QUEUE,
189 TOK_DIVERT,
190 TOK_TEE,
191 TOK_FORWARD,
192 TOK_SKIPTO,
193 TOK_DENY,
194 TOK_REJECT,
195 TOK_RESET,
196 TOK_UNREACH,
197 TOK_CHECKSTATE,
198
199 TOK_UID,
200 TOK_GID,
201 TOK_IN,
202 TOK_LIMIT,
203 TOK_KEEPSTATE,
204 TOK_REDIRECT,
205 TOK_LAYER2,
206 TOK_OUT,
207 TOK_XMIT,
208 TOK_RECV,
209 TOK_VIA,
210 TOK_FRAG,
211 TOK_IPFRAG,
212 TOK_IPOPTS,
213 TOK_IPLEN,
214 TOK_IPID,
215 TOK_IPPRECEDENCE,
216 TOK_IPTOS,
217 TOK_IPTTL,
218 TOK_IPVER,
219 TOK_ESTAB,
220 TOK_SETUP,
221 TOK_TCPFLAGS,
222 TOK_TCPOPTS,
223 TOK_TCPSEQ,
224 TOK_TCPACK,
225 TOK_TCPWIN,
226 TOK_ICMPTYPES,
227 TOK_MAC,
228 TOK_MACTYPE,
229
230 TOK_PLR,
231 TOK_NOERROR,
232 TOK_BUCKETS,
233 TOK_DSTIP,
234 TOK_SRCIP,
235 TOK_DSTPORT,
236 TOK_SRCPORT,
237 TOK_ALL,
238 TOK_MASK,
239 TOK_BW,
240 TOK_DELAY,
241 TOK_RED,
242 TOK_GRED,
243 TOK_DROPTAIL,
244 TOK_PROTO,
245 TOK_WEIGHT,
246 };
247
248 struct _s_x dummynet_params[] = {
249 { "plr", TOK_PLR },
250 { "noerror", TOK_NOERROR },
251 { "buckets", TOK_BUCKETS },
252 { "dst-ip", TOK_DSTIP },
253 { "src-ip", TOK_SRCIP },
254 { "dst-port", TOK_DSTPORT },
255 { "src-port", TOK_SRCPORT },
256 { "proto", TOK_PROTO },
257 { "weight", TOK_WEIGHT },
258 { "all", TOK_ALL },
259 { "mask", TOK_MASK },
260 { "droptail", TOK_DROPTAIL },
261 { "red", TOK_RED },
262 { "gred", TOK_GRED },
263 { "bw", TOK_BW },
264 { "bandwidth", TOK_BW },
265 { "delay", TOK_DELAY },
266 { "pipe", TOK_PIPE },
267 { "queue", TOK_QUEUE },
268 { "dummynet-params", TOK_NULL },
269 { NULL, 0 }
270 };
271
272 struct _s_x rule_actions[] = {
273 { "accept", TOK_ACCEPT },
274 { "pass", TOK_ACCEPT },
275 { "allow", TOK_ACCEPT },
276 { "permit", TOK_ACCEPT },
277 { "count", TOK_COUNT },
278 { "pipe", TOK_PIPE },
279 { "queue", TOK_QUEUE },
280 { "divert", TOK_DIVERT },
281 { "tee", TOK_TEE },
282 { "fwd", TOK_FORWARD },
283 { "forward", TOK_FORWARD },
284 { "skipto", TOK_SKIPTO },
285 { "deny", TOK_DENY },
286 { "drop", TOK_DENY },
287 { "reject", TOK_REJECT },
288 { "reset", TOK_RESET },
289 { "unreach", TOK_UNREACH },
290 { "check-state", TOK_CHECKSTATE },
291 { "defrag", TOK_DEFRAG },
292 { NULL, TOK_NULL },
293 { NULL, 0 }
294 };
295
296 struct _s_x rule_options[] = {
297 { "uid", TOK_UID },
298 { "gid", TOK_GID },
299 { "in", TOK_IN },
300 { "limit", TOK_LIMIT },
301 { "keep-state", TOK_KEEPSTATE },
302 { "redirect", TOK_REDIRECT },
303 { "rdr", TOK_REDIRECT },
304 { "layer2", TOK_LAYER2 },
305 { "out", TOK_OUT },
306 { "xmit", TOK_XMIT },
307 { "recv", TOK_RECV },
308 { "via", TOK_VIA },
309 { "fragment", TOK_FRAG },
310 { "frag", TOK_FRAG },
311 { "ipfrag", TOK_IPFRAG },
312 { "ipoptions", TOK_IPOPTS },
313 { "ipopts", TOK_IPOPTS },
314 { "iplen", TOK_IPLEN },
315 { "ipid", TOK_IPID },
316 { "ipprecedence", TOK_IPPRECEDENCE },
317 { "iptos", TOK_IPTOS },
318 { "ipttl", TOK_IPTTL },
319 { "ipversion", TOK_IPVER },
320 { "ipver", TOK_IPVER },
321 { "estab", TOK_ESTAB },
322 { "established", TOK_ESTAB },
323 { "setup", TOK_SETUP },
324 { "tcpflags", TOK_TCPFLAGS },
325 { "tcpflgs", TOK_TCPFLAGS },
326 { "tcpoptions", TOK_TCPOPTS },
327 { "tcpopts", TOK_TCPOPTS },
328 { "tcpseq", TOK_TCPSEQ },
329 { "tcpack", TOK_TCPACK },
330 { "tcpwin", TOK_TCPWIN },
331 { "icmptype", TOK_ICMPTYPES },
332 { "icmptypes", TOK_ICMPTYPES },
333 { "dst-ip", TOK_DSTIP },
334 { "src-ip", TOK_SRCIP },
335 { "dst-port", TOK_DSTPORT },
336 { "src-port", TOK_SRCPORT },
337 { "proto", TOK_PROTO },
338 { "MAC", TOK_MAC },
339 { "mac", TOK_MAC },
340 { "mac-type", TOK_MACTYPE },
341
342 { "not", TOK_NOT }, /* pseudo option */
343 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
344 { "or", TOK_OR }, /* pseudo option */
345 { "|", /* escape */ TOK_OR }, /* pseudo option */
346 { "{", TOK_STARTBRACE }, /* pseudo option */
347 { "(", TOK_STARTBRACE }, /* pseudo option */
348 { "}", TOK_ENDBRACE }, /* pseudo option */
349 { ")", TOK_ENDBRACE }, /* pseudo option */
350 { NULL, TOK_NULL },
351 { NULL, 0 }
352 };
353
354 /**
355 * match_token takes a table and a string, returns the value associated
356 * with the string (0 meaning an error in most cases)
357 */
358 static int
359 match_token(struct _s_x *table, char *string)
360 {
361 struct _s_x *pt;
362 int i = strlen(string);
363
364 for (pt = table ; i && pt->s != NULL ; pt++)
365 if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i))
366 return pt->x;
367 return -1;
368 };
369
370 static const char *
371 match_value(struct _s_x *p, u_int32_t value)
372 {
373 for (; p->s != NULL; p++)
374 if (p->x == value)
375 return p->s;
376 return NULL;
377 }
378
379 /*
380 * prints one port, symbolic or numeric
381 */
382 static void
383 print_port(int proto, u_int16_t port)
384 {
385
386 if (proto == IPPROTO_ETHERTYPE) {
387 const char *str;
388
389 if (do_resolv && (str = match_value(ether_types, port)) )
390 printf("%s", str);
391 else
392 printf("0x%04x", port);
393 } else {
394 struct servent *se = NULL;
395 if (do_resolv) {
396 struct protoent *pe = getprotobynumber(proto);
397
398 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
399 }
400 if (se)
401 printf("%s", se->s_name);
402 else
403 printf("%d", port);
404 }
405 }
406
407 /*
408 * print the values in a list of ports
409 * XXX todo: add support for mask.
410 */
411 static void
412 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
413 {
414 u_int16_t *p = cmd->ports;
415 int i;
416 const char *sep= " ";
417
418 if (cmd->o.len & F_NOT)
419 printf(" not");
420 if (opcode != 0)
421 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
422 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
423 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
424 printf("%s", sep);
425 print_port(proto, p[0]);
426 if (p[0] != p[1]) {
427 printf("-");
428 print_port(proto, p[1]);
429 }
430 sep = ",";
431 }
432 }
433
434 /*
435 * Like strtol, but also translates service names into port numbers
436 * for some protocols.
437 * In particular:
438 * proto == -1 disables the protocol check;
439 * proto == IPPROTO_ETHERTYPE looks up an internal table
440 * proto == <some value in /etc/protocols> matches the values there.
441 * Returns *end == s in case the parameter is not found.
442 */
443 static int
444 strtoport(char *str, char **end, int base, int proto)
445 {
446 char *p, *buf;
447 char *s1;
448 int i;
449
450 *end = str; /* default - not found */
451 if (*str == '\0')
452 return 0; /* not found */
453
454 if (isdigit(*str))
455 return strtol(str, end, base);
456
457 /*
458 * find separator. '\\' escapes the next char.
459 */
460 for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
461 if (*s1 == '\\' && s1[1] != '\0')
462 s1++;
463
464 buf = malloc(s1 - str + 1);
465 if (buf == NULL)
466 return 0;
467
468 /*
469 * copy into a buffer skipping backslashes
470 */
471 for (p = str, i = 0; p != s1 ; p++)
472 if ( *p != '\\')
473 buf[i++] = *p;
474 buf[i++] = '\0';
475
476 if (proto == IPPROTO_ETHERTYPE) {
477 i = match_token(ether_types, buf);
478 free(buf);
479 if (i != -1) { /* found */
480 *end = s1;
481 return i;
482 }
483 } else {
484 struct protoent *pe = NULL;
485 struct servent *se;
486
487 if (proto != 0)
488 pe = getprotobynumber(proto);
489 setservent(1);
490 se = getservbyname(buf, pe ? pe->p_name : NULL);
491 free(buf);
492 if (se != NULL) {
493 *end = s1;
494 return ntohs(se->s_port);
495 }
496 }
497 return 0; /* not found */
498 }
499
500 /*
501 * fill the body of the command with the list of port ranges.
502 * At the moment it only understands numeric ranges.
503 */
504 static int
505 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
506 {
507 u_int16_t *p = cmd->ports;
508 int i = 0;
509 char *str = av;
510
511 while (*str) {
512 u_int16_t a, b;
513
514 a = strtoport(av, &str, 0, proto);
515 if (str == av) /* no parameter */
516 break;
517 if (*str == '-') { /* a range */
518 av = str+1;
519 b = strtoport(av, &str, 0, proto);
520 if (str == av) /* no parameter */
521 break;
522 p[0] = a;
523 p[1] = b;
524 } else if (*str == ',' || *str == '\0' ) {
525 p[0] = p[1] = a;
526 } else { /* invalid separator */
527 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
528 *str, av);
529 }
530 i++;
531 p += 2;
532 av = str+1;
533 }
534 if (i > 0) {
535 if (i+1 > F_LEN_MASK)
536 errx(EX_DATAERR, "too many ports/ranges\n");
537 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
538 }
539 return i;
540 }
541
542 static struct _s_x icmpcodes[] = {
543 { "net", ICMP_UNREACH_NET },
544 { "host", ICMP_UNREACH_HOST },
545 { "protocol", ICMP_UNREACH_PROTOCOL },
546 { "port", ICMP_UNREACH_PORT },
547 { "needfrag", ICMP_UNREACH_NEEDFRAG },
548 { "srcfail", ICMP_UNREACH_SRCFAIL },
549 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
550 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
551 { "isolated", ICMP_UNREACH_ISOLATED },
552 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
553 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
554 { "tosnet", ICMP_UNREACH_TOSNET },
555 { "toshost", ICMP_UNREACH_TOSHOST },
556 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
557 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
558 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
559 { NULL, 0 }
560 };
561
562 static void
563 fill_reject_code(u_short *codep, char *str)
564 {
565 int val;
566 char *s1;
567
568 val = strtoul(str, &s1, 0);
569 if (s1 == str || *s1 != '\0' || val >= 0x100)
570 val = match_token(icmpcodes, str);
571 if (val < 0)
572 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
573 *codep = val;
574 return;
575 }
576
577 static void
578 print_reject_code(u_int16_t code)
579 {
580 const char *str = match_value(icmpcodes, code);
581
582 if (str != NULL)
583 printf("unreach %s", str);
584 else
585 printf("unreach %u", code);
586 }
587
588 /*
589 * Returns the number of bits set (from left) in a contiguous bitmask,
590 * or -1 if the mask is not contiguous.
591 * XXX this needs a proper fix.
592 * This effectively works on masks in big-endian (network) format.
593 * when compiled on little endian architectures.
594 *
595 * First bit is bit 7 of the first byte -- note, for MAC addresses,
596 * the first bit on the wire is bit 0 of the first byte.
597 * len is the max length in bits.
598 */
599 static int
600 contigmask(u_char *p, int len)
601 {
602 int i, n;
603 for (i=0; i<len ; i++)
604 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
605 break;
606 for (n=i+1; n < len; n++)
607 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
608 return -1; /* mask not contiguous */
609 return i;
610 }
611
612 /*
613 * print flags set/clear in the two bitmasks passed as parameters.
614 * There is a specialized check for f_tcpflags.
615 */
616 static void
617 print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list)
618 {
619 const char *comma="";
620 int i;
621 u_char set = cmd->arg1 & 0xff;
622 u_char clear = (cmd->arg1 >> 8) & 0xff;
623
624 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
625 printf(" setup");
626 return;
627 }
628
629 printf(" %s ", name);
630 for (i=0; list[i].x != 0; i++) {
631 if (set & list[i].x) {
632 set &= ~list[i].x;
633 printf("%s%s", comma, list[i].s);
634 comma = ",";
635 }
636 if (clear & list[i].x) {
637 clear &= ~list[i].x;
638 printf("%s!%s", comma, list[i].s);
639 comma = ",";
640 }
641 }
642 }
643
644 /*
645 * Print the ip address contained in a command.
646 */
647 static void
648 print_ip(ipfw_insn_ip *cmd, const char *str)
649 {
650 struct hostent *he = NULL;
651 int mb;
652
653 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str);
654
655 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
656 printf("me");
657 return;
658 }
659 if (cmd->o.opcode == O_IP_SRC_TABLE ||
660 cmd->o.opcode == O_IP_DST_TABLE) {
661 printf("<%u>", cmd->o.arg1);
662 return;
663 }
664 if (cmd->o.opcode == O_IP_SRC_IFIP ||
665 cmd->o.opcode == O_IP_DST_IFIP) {
666 printf("[%s%s]", ((ipfw_insn_ifip *)cmd)->ifname,
667 (cmd->o.arg1 & IPFW_IFIP_NET) ? ":net" : "");
668 return;
669 }
670 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
671 u_int32_t x, *d;
672 int i;
673 char comma = '{';
674
675 x = cmd->o.arg1 - 1;
676 x = htonl( ~x );
677 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
678 printf("%s/%d", inet_ntoa(cmd->addr),
679 contigmask((u_char *)&x, 32));
680 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
681 x &= 0xff; /* base */
682 d = (u_int32_t *)&(cmd->mask);
683 for (i=0; i < cmd->o.arg1; i++)
684 if (d[ i/32] & (1<<(i & 31))) {
685 printf("%c%d", comma, i+x);
686 comma = ',';
687 }
688 printf("}");
689 return;
690 }
691 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
692 mb = 32;
693 else
694 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
695 if (mb == 32 && do_resolv)
696 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long),
697 AF_INET);
698 if (he != NULL) /* resolved to name */
699 printf("%s", he->h_name);
700 else if (mb == 0) /* any */
701 printf("any");
702 else { /* numeric IP followed by some kind of mask */
703 printf("%s", inet_ntoa(cmd->addr));
704 if (mb < 0)
705 printf(":%s", inet_ntoa(cmd->mask));
706 else if (mb < 32)
707 printf("/%d", mb);
708 }
709 }
710
711 /*
712 * prints a MAC address/mask pair
713 */
714 static void
715 print_mac(u_char *addr, u_char *mask)
716 {
717 int l = contigmask(mask, 48);
718
719 if (l == 0)
720 printf(" any");
721 else {
722 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
723 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
724 if (l == -1)
725 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
726 mask[0], mask[1], mask[2],
727 mask[3], mask[4], mask[5]);
728 else if (l < 48)
729 printf("/%d", l);
730 }
731 }
732
733 static void
734 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
735 {
736 u_int8_t type;
737
738 cmd->d[0] = 0;
739 while (*av) {
740 if (*av == ',')
741 av++;
742
743 type = strtoul(av, &av, 0);
744
745 if (*av != ',' && *av != '\0')
746 errx(EX_DATAERR, "invalid ICMP type");
747
748 if (type > 31)
749 errx(EX_DATAERR, "ICMP type out of range");
750
751 cmd->d[0] |= 1 << type;
752 }
753 cmd->o.opcode = O_ICMPTYPE;
754 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
755 }
756
757 static void
758 print_icmptypes(ipfw_insn_u32 *cmd)
759 {
760 int i;
761 char sep= ' ';
762
763 printf(" icmptypes");
764 for (i = 0; i < 32; i++) {
765 if ( (cmd->d[0] & (1 << (i))) == 0)
766 continue;
767 printf("%c%d", sep, i);
768 sep = ',';
769 }
770 }
771
772 /*
773 * show_ipfw() prints the body of an ipfw rule.
774 * Because the standard rule has at least proto src_ip dst_ip, we use
775 * a helper function to produce these entries if not provided explicitly.
776 * The first argument is the list of fields we have, the second is
777 * the list of fields we want to be printed.
778 *
779 * Special cases if we have provided a MAC header:
780 * + if the rule does not contain IP addresses/ports, do not print them;
781 * + if the rule does not contain an IP proto, print "all" instead of "ip";
782 *
783 * Once we have 'have_options', IP header fields are printed as options.
784 */
785 #define HAVE_PROTO 0x0001
786 #define HAVE_SRCIP 0x0002
787 #define HAVE_DSTIP 0x0004
788 #define HAVE_MAC 0x0008
789 #define HAVE_MACTYPE 0x0010
790 #define HAVE_OPTIONS 0x8000
791
792 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
793 static void
794 show_prerequisites(int *flags, int want, int cmd)
795 {
796 if ( (*flags & HAVE_IP) == HAVE_IP)
797 *flags |= HAVE_OPTIONS;
798
799 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
800 cmd != O_MAC_TYPE) {
801 /*
802 * mac-type was optimized out by the compiler,
803 * restore it
804 */
805 printf(" any");
806 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
807 return;
808 }
809 if ( !(*flags & HAVE_OPTIONS)) {
810 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
811 printf(" ip");
812 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
813 printf(" from any");
814 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
815 printf(" to any");
816 }
817 *flags |= want;
818 }
819
820 static void
821 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
822 {
823 static int twidth = 0;
824 int l;
825 ipfw_insn *cmd;
826 int proto = 0; /* default */
827 int flags = 0; /* prerequisites */
828 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
829 int or_block = 0; /* we are in an or block */
830
831 u_int32_t set_disable = rule->set_disable;
832
833 if (set_disable & (1 << rule->set)) { /* disabled */
834 if (!show_sets)
835 return;
836 else
837 printf("# DISABLED ");
838 }
839 printf("%05u ", rule->rulenum);
840
841 if (do_acct)
842 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth,
843 (uintmax_t)rule->bcnt);
844
845 if (do_time) {
846 char timestr[30];
847
848 if (twidth == 0) {
849 time_t t0 = 0;
850
851 strcpy(timestr, ctime((time_t *)&t0));
852 *strchr(timestr, '\n') = '\0';
853 twidth = strlen(timestr);
854 }
855 if (rule->timestamp) {
856 time_t t = _long_to_time(rule->timestamp);
857
858 strcpy(timestr, ctime(&t));
859 *strchr(timestr, '\n') = '\0';
860 printf("%s ", timestr);
861 } else {
862 printf("%*s ", twidth, " ");
863 }
864 }
865
866 if (show_sets)
867 printf("set %d ", rule->set);
868
869 /*
870 * print the optional "match probability"
871 */
872 if (rule->cmd_len > 0) {
873 cmd = rule->cmd ;
874 if (cmd->opcode == O_PROB) {
875 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
876 double d = 1.0 * p->d[0];
877
878 d = (d / 0x7fffffff);
879 printf("prob %f ", d);
880 }
881 }
882
883 /*
884 * first print actions
885 */
886 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
887 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
888 switch(cmd->opcode) {
889 case O_CHECK_STATE:
890 printf("check-state");
891 flags = HAVE_IP; /* avoid printing anything else */
892 break;
893
894 case O_ACCEPT:
895 printf("allow");
896 break;
897
898 case O_COUNT:
899 printf("count");
900 break;
901
902 case O_DEFRAG:
903 printf("defrag");
904 break;
905
906 case O_DENY:
907 printf("deny");
908 break;
909
910 case O_REJECT:
911 if (cmd->arg1 == ICMP_REJECT_RST)
912 printf("reset");
913 else if (cmd->arg1 == ICMP_UNREACH_HOST)
914 printf("reject");
915 else
916 print_reject_code(cmd->arg1);
917 break;
918
919 case O_SKIPTO:
920 printf("skipto %u", cmd->arg1);
921 break;
922
923 case O_PIPE:
924 printf("pipe %u", cmd->arg1);
925 break;
926
927 case O_QUEUE:
928 printf("queue %u", cmd->arg1);
929 break;
930
931 case O_DIVERT:
932 printf("divert %u", cmd->arg1);
933 break;
934
935 case O_TEE:
936 printf("tee %u", cmd->arg1);
937 break;
938
939 case O_FORWARD_IP:
940 {
941 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
942
943 printf("fwd %s", inet_ntoa(sa->sa.sin_addr));
944 if (sa->sa.sin_port)
945 printf(",%d", sa->sa.sin_port);
946 }
947 break;
948
949 case O_LOG: /* O_LOG is printed last */
950 logptr = (ipfw_insn_log *)cmd;
951 break;
952
953 default:
954 printf("** unrecognized action %d len %d",
955 cmd->opcode, cmd->len);
956 }
957 }
958 if (logptr) {
959 if (logptr->max_log > 0)
960 printf(" log logamount %d", logptr->max_log);
961 else
962 printf(" log");
963 }
964
965 /*
966 * then print the body.
967 */
968 if (rule->usr_flags & IPFW_USR_F_NORULE) {
969 /* empty rules before options */
970 if (!do_compact)
971 printf(" ip from any to any");
972 flags |= HAVE_IP | HAVE_OPTIONS;
973 }
974
975 for (l = rule->act_ofs, cmd = rule->cmd ;
976 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
977 /* useful alias */
978 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
979
980 show_prerequisites(&flags, 0, cmd->opcode);
981
982 switch(cmd->opcode) {
983 case O_PROB:
984 break; /* done already */
985
986 case O_PROBE_STATE:
987 break; /* no need to print anything here */
988
989 case O_MACADDR2: {
990 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
991
992 if ((cmd->len & F_OR) && !or_block)
993 printf(" {");
994 if (cmd->len & F_NOT)
995 printf(" not");
996 printf(" MAC");
997 flags |= HAVE_MAC;
998 print_mac( m->addr, m->mask);
999 print_mac( m->addr + 6, m->mask + 6);
1000 }
1001 break;
1002
1003 case O_MAC_TYPE:
1004 if ((cmd->len & F_OR) && !or_block)
1005 printf(" {");
1006 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
1007 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1008 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
1009 break;
1010
1011 case O_IP_SRC:
1012 case O_IP_SRC_MASK:
1013 case O_IP_SRC_ME:
1014 case O_IP_SRC_SET:
1015 case O_IP_SRC_TABLE:
1016 case O_IP_SRC_IFIP:
1017 show_prerequisites(&flags, HAVE_PROTO, 0);
1018 if (!(flags & HAVE_SRCIP))
1019 printf(" from");
1020 if ((cmd->len & F_OR) && !or_block)
1021 printf(" {");
1022 print_ip((ipfw_insn_ip *)cmd,
1023 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1024 flags |= HAVE_SRCIP;
1025 break;
1026
1027 case O_IP_DST:
1028 case O_IP_DST_MASK:
1029 case O_IP_DST_ME:
1030 case O_IP_DST_SET:
1031 case O_IP_DST_TABLE:
1032 case O_IP_DST_IFIP:
1033 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1034 if (!(flags & HAVE_DSTIP))
1035 printf(" to");
1036 if ((cmd->len & F_OR) && !or_block)
1037 printf(" {");
1038 print_ip((ipfw_insn_ip *)cmd,
1039 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1040 flags |= HAVE_DSTIP;
1041 break;
1042
1043 case O_IP_DSTPORT:
1044 show_prerequisites(&flags, HAVE_IP, 0);
1045 case O_IP_SRCPORT:
1046 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1047 if ((cmd->len & F_OR) && !or_block)
1048 printf(" {");
1049 print_newports((ipfw_insn_u16 *)cmd, proto,
1050 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1051 break;
1052
1053 case O_PROTO: {
1054 struct protoent *pe;
1055
1056 if ((cmd->len & F_OR) && !or_block)
1057 printf(" {");
1058 if (cmd->len & F_NOT)
1059 printf(" not");
1060 proto = cmd->arg1;
1061 pe = getprotobynumber(cmd->arg1);
1062 if (flags & HAVE_OPTIONS)
1063 printf(" proto");
1064 if (pe)
1065 printf(" %s", pe->p_name);
1066 else
1067 printf(" %u", cmd->arg1);
1068 }
1069 flags |= HAVE_PROTO;
1070 break;
1071
1072 default: /*options ... */
1073 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1074 if ((cmd->len & F_OR) && !or_block)
1075 printf(" {");
1076 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1077 printf(" not");
1078 switch(cmd->opcode) {
1079 case O_FRAG:
1080 printf(" frag");
1081 break;
1082
1083 case O_IPFRAG:
1084 printf(" ipfrag");
1085 break;
1086
1087 case O_IN:
1088 printf(cmd->len & F_NOT ? " out" : " in");
1089 break;
1090
1091 case O_LAYER2:
1092 printf(" layer2");
1093 break;
1094 case O_XMIT:
1095 case O_RECV:
1096 case O_VIA: {
1097 const char *dir;
1098 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1099
1100 if (cmd->opcode == O_XMIT)
1101 dir = "xmit";
1102 else if (cmd->opcode == O_RECV)
1103 dir = "recv";
1104 else if (cmd->opcode == O_VIA)
1105 dir = "via";
1106 else
1107 dir = "?huh?";
1108 if (cmdif->name[0] == '\0')
1109 printf(" %s %s", dir,
1110 inet_ntoa(cmdif->p.ip));
1111 printf(" %s %s", dir, cmdif->name);
1112 }
1113 break;
1114
1115 case O_IPID:
1116 printf(" ipid %u", cmd->arg1 );
1117 break;
1118
1119 case O_IPTTL:
1120 printf(" ipttl %u", cmd->arg1 );
1121 break;
1122
1123 case O_IPVER:
1124 printf(" ipver %u", cmd->arg1 );
1125 break;
1126
1127 case O_IPPRECEDENCE:
1128 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1129 break;
1130
1131 case O_IPLEN:
1132 printf(" iplen %u", cmd->arg1 );
1133 break;
1134
1135 case O_IPOPT:
1136 print_flags("ipoptions", cmd, f_ipopts);
1137 break;
1138
1139 case O_IPTOS:
1140 print_flags("iptos", cmd, f_iptos);
1141 break;
1142
1143 case O_ICMPTYPE:
1144 print_icmptypes((ipfw_insn_u32 *)cmd);
1145 break;
1146
1147 case O_ESTAB:
1148 printf(" established");
1149 break;
1150
1151 case O_TCPFLAGS:
1152 print_flags("tcpflags", cmd, f_tcpflags);
1153 break;
1154
1155 case O_TCPOPTS:
1156 print_flags("tcpoptions", cmd, f_tcpopts);
1157 break;
1158
1159 case O_TCPWIN:
1160 printf(" tcpwin %d", ntohs(cmd->arg1));
1161 break;
1162
1163 case O_TCPACK:
1164 printf(" tcpack %u", ntohl(cmd32->d[0]));
1165 break;
1166
1167 case O_TCPSEQ:
1168 printf(" tcpseq %u", ntohl(cmd32->d[0]));
1169 break;
1170
1171 case O_UID:
1172 {
1173 struct passwd *pwd = getpwuid(cmd32->d[0]);
1174
1175 if (pwd)
1176 printf(" uid %s", pwd->pw_name);
1177 else
1178 printf(" uid %u", cmd32->d[0]);
1179 }
1180 break;
1181
1182 case O_GID:
1183 {
1184 struct group *grp = getgrgid(cmd32->d[0]);
1185
1186 if (grp)
1187 printf(" gid %s", grp->gr_name);
1188 else
1189 printf(" gid %u", cmd32->d[0]);
1190 }
1191 break;
1192
1193 case O_KEEP_STATE:
1194 printf(" keep-state");
1195 break;
1196
1197 case O_REDIRECT:
1198 {
1199 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd;
1200
1201 printf(" rdr %s", inet_ntoa(c->addr));
1202 if (c->port != 0)
1203 printf(",%u", ntohs(c->port));
1204 break;
1205 }
1206
1207 case O_LIMIT:
1208 {
1209 struct _s_x *p = limit_masks;
1210 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1211 u_int8_t x = c->limit_mask;
1212 const char *comma = " ";
1213
1214 printf(" limit");
1215 for ( ; p->x != 0 ; p++)
1216 if ((x & p->x) == p->x) {
1217 x &= ~p->x;
1218 printf("%s%s", comma, p->s);
1219 comma = ",";
1220 }
1221 printf(" %d", c->conn_limit);
1222 }
1223 break;
1224
1225 default:
1226 printf(" [opcode %d len %d]",
1227 cmd->opcode, cmd->len);
1228 }
1229 }
1230 if (cmd->len & F_OR) {
1231 printf(" or");
1232 or_block = 1;
1233 } else if (or_block) {
1234 printf(" }");
1235 or_block = 0;
1236 }
1237 }
1238 show_prerequisites(&flags, HAVE_IP, 0);
1239
1240 printf("\n");
1241 }
1242
1243 static void
1244 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1245 {
1246 struct protoent *pe;
1247 struct in_addr a;
1248
1249 if (!do_expired) {
1250 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1251 return;
1252 }
1253
1254 printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt,
1255 bcwidth, (uintmax_t)d->bcnt, d->expire);
1256 switch (d->dyn_type) {
1257 case O_LIMIT_PARENT:
1258 printf(" PARENT %d", d->count);
1259 break;
1260 case O_LIMIT:
1261 printf(" LIMIT");
1262 break;
1263 case O_KEEP_STATE: /* bidir, no mask */
1264 printf(" STATE");
1265 break;
1266 case O_REDIRECT:
1267 printf(" REDIRECT");
1268 break;
1269 }
1270
1271 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1272 printf(" %s", pe->p_name);
1273 else
1274 printf(" proto %u", d->id.u.ip.proto);
1275
1276 a.s_addr = htonl(d->id.u.ip.src_ip);
1277 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1278
1279 a.s_addr = htonl(d->id.u.ip.dst_ip);
1280 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1281
1282 if (d->dyn_type == O_REDIRECT) {
1283 struct in_addr xlat_addr;
1284
1285 xlat_addr.s_addr = htonl(d->xlat_addr);
1286 printf(" => %s %d", inet_ntoa(xlat_addr), d->xlat_port);
1287 }
1288 printf("\n");
1289 }
1290
1291 static int
1292 sort_q(const void *pa, const void *pb)
1293 {
1294 int rev = (do_sort < 0);
1295 int field = rev ? -do_sort : do_sort;
1296 long long res = 0;
1297 const struct dn_ioc_flowqueue *a = pa;
1298 const struct dn_ioc_flowqueue *b = pb;
1299
1300 switch (field) {
1301 case 1: /* pkts */
1302 res = a->len - b->len;
1303 break;
1304 case 2: /* bytes */
1305 res = a->len_bytes - b->len_bytes;
1306 break;
1307
1308 case 3: /* tot pkts */
1309 res = a->tot_pkts - b->tot_pkts;
1310 break;
1311
1312 case 4: /* tot bytes */
1313 res = a->tot_bytes - b->tot_bytes;
1314 break;
1315 }
1316 if (res < 0)
1317 res = -1;
1318 if (res > 0)
1319 res = 1;
1320 return (int)(rev ? res : -res);
1321 }
1322
1323 static void
1324 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1325 {
1326 int l;
1327
1328 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1329 fs->flow_mask.u.ip.proto,
1330 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1331 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1332 if (fs->rq_elements == 0)
1333 return;
1334
1335 printf("BKT Prot ___Source IP/port____ "
1336 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1337 if (do_sort != 0)
1338 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1339 for (l = 0; l < fs->rq_elements; l++) {
1340 struct in_addr ina;
1341 struct protoent *pe;
1342
1343 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1344 printf("%3d ", q[l].hash_slot);
1345 pe = getprotobynumber(q[l].id.u.ip.proto);
1346 if (pe)
1347 printf("%-4s ", pe->p_name);
1348 else
1349 printf("%4u ", q[l].id.u.ip.proto);
1350 printf("%15s/%-5d ",
1351 inet_ntoa(ina), q[l].id.u.ip.src_port);
1352 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1353 printf("%15s/%-5d ",
1354 inet_ntoa(ina), q[l].id.u.ip.dst_port);
1355 printf("%4ju %8ju %2u %4u %3u\n",
1356 (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes,
1357 q[l].len, q[l].len_bytes, q[l].drops);
1358 if (verbose)
1359 printf(" S %20ju F %20ju\n",
1360 (uintmax_t)q[l].S, (uintmax_t)q[l].F);
1361 }
1362 }
1363
1364 static void
1365 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1366 {
1367 int l;
1368 char qs[30];
1369 char plr[30];
1370 char red[90]; /* Display RED parameters */
1371
1372 l = fs->qsize;
1373 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1374 if (l >= 8192)
1375 sprintf(qs, "%d KB", l / 1024);
1376 else
1377 sprintf(qs, "%d B", l);
1378 } else
1379 sprintf(qs, "%3d sl.", l);
1380 if (fs->plr)
1381 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1382 else
1383 plr[0] = '\0';
1384 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
1385 sprintf(red,
1386 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
1387 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1388 1.0 * fs->w_q / (double)(1 << SCALE_RED),
1389 SCALE_VAL(fs->min_th),
1390 SCALE_VAL(fs->max_th),
1391 1.0 * fs->max_p / (double)(1 << SCALE_RED));
1392 else
1393 sprintf(red, "droptail");
1394
1395 printf("%s %s%s %d queues (%d buckets) %s\n",
1396 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1397 }
1398
1399 static void
1400 list_pipes(void *data, int nbytes, int ac, char *av[])
1401 {
1402 u_long rulenum;
1403 void *next = data;
1404 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1405 struct dn_ioc_flowset *fs;
1406 struct dn_ioc_flowqueue *q;
1407 int l;
1408
1409 if (ac > 0)
1410 rulenum = strtoul(*av++, NULL, 10);
1411 else
1412 rulenum = 0;
1413 for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1414 double b = p->bandwidth;
1415 char buf[30];
1416 char prefix[80];
1417
1418 if (p->fs.fs_type != DN_IS_PIPE)
1419 break; /* done with pipes, now queues */
1420
1421 /*
1422 * compute length, as pipe have variable size
1423 */
1424 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1425 next = (uint8_t *)p + l;
1426 nbytes -= l;
1427
1428 if (rulenum != 0 && rulenum != (u_long)p->pipe_nr)
1429 continue;
1430
1431 /*
1432 * Print rate
1433 */
1434 if (b == 0)
1435 sprintf(buf, "unlimited");
1436 else if (b >= 1000000)
1437 sprintf(buf, "%7.3f Mbit/s", b/1000000);
1438 else if (b >= 1000)
1439 sprintf(buf, "%7.3f Kbit/s", b/1000);
1440 else
1441 sprintf(buf, "%7.3f bit/s ", b);
1442
1443 sprintf(prefix, "%05d: %s %4d ms ",
1444 p->pipe_nr, buf, p->delay);
1445 print_flowset_parms(&p->fs, prefix);
1446 if (verbose)
1447 printf(" V %20ju\n", (uintmax_t)p->V >> MY_M);
1448
1449 q = (struct dn_ioc_flowqueue *)(p+1);
1450 list_queues(&p->fs, q);
1451 }
1452 for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) {
1453 char prefix[80];
1454
1455 if (fs->fs_type != DN_IS_QUEUE)
1456 break;
1457 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1458 next = (uint8_t *)fs + l;
1459 nbytes -= l;
1460 q = (struct dn_ioc_flowqueue *)(fs+1);
1461 sprintf(prefix, "q%05d: weight %d pipe %d ",
1462 fs->fs_nr, fs->weight, fs->parent_nr);
1463 print_flowset_parms(fs, prefix);
1464 list_queues(fs, q);
1465 }
1466 }
1467
1468 /*
1469 * This one handles all set-related commands
1470 * ipfw set { show | enable | disable }
1471 * ipfw set swap X Y
1472 * ipfw set move X to Y
1473 * ipfw set move rule X to Y
1474 */
1475 static void
1476 sets_handler(int ac, char *av[])
1477 {
1478 u_int32_t set_disable, masks[2];
1479 int i, nbytes;
1480 u_int16_t rulenum;
1481 u_int8_t cmd, new_set;
1482
1483 ac--;
1484 av++;
1485
1486 if (!ac)
1487 errx(EX_USAGE, "set needs command");
1488 if (!strncmp(*av, "show", strlen(*av)) ) {
1489 void *data;
1490 const char *msg;
1491
1492 nbytes = sizeof(struct ipfw_ioc_rule);
1493 if ((data = malloc(nbytes)) == NULL)
1494 err(EX_OSERR, "malloc");
1495 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1496 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1497 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1498
1499 for (i = 0, msg = "disable" ; i < 31; i++)
1500 if ( (set_disable & (1<<i))) {
1501 printf("%s %d", msg, i);
1502 msg = "";
1503 }
1504 msg = (set_disable) ? " enable" : "enable";
1505 for (i = 0; i < 31; i++)
1506 if ( !(set_disable & (1<<i))) {
1507 printf("%s %d", msg, i);
1508 msg = "";
1509 }
1510 printf("\n");
1511 } else if (!strncmp(*av, "swap", strlen(*av))) {
1512 ac--; av++;
1513 if (ac != 2)
1514 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1515 rulenum = atoi(av[0]);
1516 new_set = atoi(av[1]);
1517 if (!isdigit(*(av[0])) || rulenum > 30)
1518 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1519 if (!isdigit(*(av[1])) || new_set > 30)
1520 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1521 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1522 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1523 masks, sizeof(u_int32_t));
1524 } else if (!strncmp(*av, "move", strlen(*av))) {
1525 ac--; av++;
1526 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1527 cmd = 2;
1528 ac--; av++;
1529 } else
1530 cmd = 3;
1531 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1532 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1533 rulenum = atoi(av[0]);
1534 new_set = atoi(av[2]);
1535 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1536 (cmd == 2 && rulenum == 65535) )
1537 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1538 if (!isdigit(*(av[2])) || new_set > 30)
1539 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1540 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1541 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1542 masks, sizeof(u_int32_t));
1543 } else if (!strncmp(*av, "disable", strlen(*av)) ||
1544 !strncmp(*av, "enable", strlen(*av)) ) {
1545 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0;
1546
1547 ac--; av++;
1548 masks[0] = masks[1] = 0;
1549
1550 while (ac) {
1551 if (isdigit(**av)) {
1552 i = atoi(*av);
1553 if (i < 0 || i > 30)
1554 errx(EX_DATAERR,
1555 "invalid set number %d\n", i);
1556 masks[which] |= (1<<i);
1557 } else if (!strncmp(*av, "disable", strlen(*av)))
1558 which = 0;
1559 else if (!strncmp(*av, "enable", strlen(*av)))
1560 which = 1;
1561 else
1562 errx(EX_DATAERR,
1563 "invalid set command %s\n", *av);
1564 av++; ac--;
1565 }
1566 if ( (masks[0] & masks[1]) != 0 )
1567 errx(EX_DATAERR,
1568 "cannot enable and disable the same set\n");
1569
1570 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1571 if (i)
1572 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1573 } else
1574 errx(EX_USAGE, "invalid set command %s\n", *av);
1575 }
1576
1577 static void
1578 sysctl_handler(int ac, char *av[], int which)
1579 {
1580 ac--;
1581 av++;
1582
1583 if (*av == NULL) {
1584 warnx("missing keyword to enable/disable\n");
1585 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1586 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1587 &which, sizeof(which));
1588 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1589 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1590 &which, sizeof(which));
1591 } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1592 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1593 &which, sizeof(which));
1594 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1595 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1596 &which, sizeof(which));
1597 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1598 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1599 &which, sizeof(which));
1600 } else {
1601 warnx("unrecognize enable/disable keyword: %s\n", *av);
1602 }
1603 }
1604
1605 static void
1606 list(int ac, char *av[])
1607 {
1608 struct ipfw_ioc_rule *r;
1609 struct ipfw_ioc_state *dynrules, *d;
1610
1611 void *data = NULL;
1612 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1613 int exitval = EX_OK;
1614 int lac;
1615 char **lav;
1616 u_long rnum;
1617 char *endptr;
1618 int seen = 0;
1619
1620 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1621 int nalloc = 1024; /* start somewhere... */
1622
1623 ac--;
1624 av++;
1625
1626 /* get rules or pipes from kernel, resizing array as necessary */
1627 nbytes = nalloc;
1628
1629 while (nbytes >= nalloc) {
1630 nalloc = nalloc * 2 + 200;
1631 nbytes = nalloc;
1632 if ((data = realloc(data, nbytes)) == NULL)
1633 err(EX_OSERR, "realloc");
1634 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1635 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1636 do_pipe ? "DUMMYNET" : "FW");
1637 }
1638
1639 if (do_pipe) {
1640 list_pipes(data, nbytes, ac, av);
1641 goto done;
1642 }
1643
1644 /*
1645 * Count static rules.
1646 */
1647 r = data;
1648 nstat = r->static_count;
1649
1650 /*
1651 * Count dynamic rules. This is easier as they have
1652 * fixed size.
1653 */
1654 dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len);
1655 ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1656
1657 /* if showing stats, figure out column widths ahead of time */
1658 bcwidth = pcwidth = 0;
1659 if (do_acct) {
1660 for (n = 0, r = data; n < nstat; n++,
1661 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1662 /* packet counter */
1663 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt);
1664 if (width > pcwidth)
1665 pcwidth = width;
1666
1667 /* byte counter */
1668 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt);
1669 if (width > bcwidth)
1670 bcwidth = width;
1671 }
1672 }
1673 if (do_dynamic && ndyn) {
1674 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1675 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt);
1676 if (width > pcwidth)
1677 pcwidth = width;
1678
1679 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt);
1680 if (width > bcwidth)
1681 bcwidth = width;
1682 }
1683 }
1684 /* if no rule numbers were specified, list all rules */
1685 if (ac == 0) {
1686 for (n = 0, r = data; n < nstat; n++,
1687 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r)))
1688 show_ipfw(r, pcwidth, bcwidth);
1689
1690 if (do_dynamic && ndyn) {
1691 printf("## Dynamic rules (%d):\n", ndyn);
1692 for (n = 0, d = dynrules; n < ndyn; n++, d++)
1693 show_dyn_ipfw(d, pcwidth, bcwidth);
1694 }
1695 goto done;
1696 }
1697
1698 /* display specific rules requested on command line */
1699
1700 for (lac = ac, lav = av; lac != 0; lac--) {
1701 /* convert command line rule # */
1702 rnum = strtoul(*lav++, &endptr, 10);
1703 if (*endptr) {
1704 exitval = EX_USAGE;
1705 warnx("invalid rule number: %s", *(lav - 1));
1706 continue;
1707 }
1708 for (n = seen = 0, r = data; n < nstat; n++,
1709 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1710 if (r->rulenum > rnum)
1711 break;
1712 if (r->rulenum == rnum) {
1713 show_ipfw(r, pcwidth, bcwidth);
1714 seen = 1;
1715 }
1716 }
1717 if (!seen) {
1718 /* give precedence to other error(s) */
1719 if (exitval == EX_OK)
1720 exitval = EX_UNAVAILABLE;
1721 warnx("rule %lu does not exist", rnum);
1722 }
1723 }
1724
1725 if (do_dynamic && ndyn) {
1726 printf("## Dynamic rules:\n");
1727 for (lac = ac, lav = av; lac != 0; lac--) {
1728 rnum = strtoul(*lav++, &endptr, 10);
1729 if (*endptr)
1730 /* already warned */
1731 continue;
1732 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1733 if (d->rulenum > rnum)
1734 break;
1735 if (d->rulenum == rnum)
1736 show_dyn_ipfw(d, pcwidth, bcwidth);
1737 }
1738 }
1739 }
1740
1741 ac = 0;
1742
1743 done:
1744 free(data);
1745
1746 if (exitval != EX_OK)
1747 exit(exitval);
1748 }
1749
1750 static void
1751 show_usage(void)
1752 {
1753 fprintf(stderr, "usage: ipfw [options]\n"
1754 " add [number] rule\n"
1755 " pipe number config [pipeconfig]\n"
1756 " queue number config [queueconfig]\n"
1757 " [pipe] flush\n"
1758 " [pipe] delete number ...\n"
1759 " [pipe] {list|show} [number ...]\n"
1760 " {zero|resetlog} [number ...]\n"
1761 "do \"ipfw -h\" or see ipfw manpage for details\n"
1762 );
1763
1764 exit(EX_USAGE);
1765 }
1766
1767 static void
1768 help(void)
1769 {
1770
1771 fprintf(stderr, "ipfw syntax summary:\n"
1772 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1773 "ipfw {pipe|queue} N config BODY\n"
1774 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1775 "\n"
1776 "RULE: [1..] [PROB] BODY\n"
1777 "RULENUM: INTEGER(1..65534)\n"
1778 "PROB: prob REAL(0..1)\n"
1779 "BODY: check-state [LOG] (no body) |\n"
1780 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1781 "ACTION: check-state | allow | count | deny | reject | skipto N |\n"
1782 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1783 "ADDR: [ MAC dst src ether_type ] \n"
1784 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1785 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n"
1786 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1787 "OPTION_LIST: OPTION [,OPTION_LIST]\n"
1788 );
1789 exit(0);
1790 }
1791
1792
1793 static int
1794 lookup_host (char *host, struct in_addr *ipaddr)
1795 {
1796 struct hostent *he;
1797
1798 if (!inet_aton(host, ipaddr)) {
1799 if ((he = gethostbyname(host)) == NULL)
1800 return(-1);
1801 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1802 }
1803 return(0);
1804 }
1805
1806 /*
1807 * fills the addr and mask fields in the instruction as appropriate from av.
1808 * Update length as appropriate.
1809 * The following formats are allowed:
1810 * any matches any IP. Actually returns an empty instruction.
1811 * me returns O_IP_*_ME
1812 * <table_id> O_IP_*_TABLE
1813 * [iface[:net]] O_IP_*_IFIP
1814 * 1.2.3.4 single IP address
1815 * 1.2.3.4:5.6.7.8 address:mask
1816 * 1.2.3.4/24 address/mask
1817 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1818 */
1819 static void
1820 fill_ip(ipfw_insn_ip *cmd, char *av)
1821 {
1822 char *p = NULL, md = 0;
1823 u_int32_t i;
1824
1825 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1826
1827 if (!strncmp(av, "any", strlen(av)))
1828 return;
1829
1830 if (!strncmp(av, "me", strlen(av))) {
1831 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1832 return;
1833 }
1834
1835 if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') {
1836 int pos = strlen(av) - 1;
1837 uint16_t tableid;
1838 char *eptr;
1839
1840 /*
1841 * Table: "<tableid>"
1842 */
1843 av[pos] = '\0';
1844 tableid = strtoul(&av[1], &eptr, 0);
1845 if (*eptr != '\0') {
1846 av[pos] = '>';
1847 errx(EX_DATAERR, "invalid tableid ``%s''", av);
1848 }
1849 av[pos] = '>';
1850 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1851 cmd->o.opcode = O_IP_DST_TABLE;
1852 cmd->o.arg1 = tableid;
1853 return;
1854 }
1855
1856 if (strlen(av) >= 3 && av[0] == '[' && av[strlen(av) - 1] == ']') {
1857 int pos = strlen(av) - 1;
1858 ipfw_insn_ifip *cmd1 = (ipfw_insn_ifip *)cmd;
1859 char *c;
1860
1861 /*
1862 * Interface IP: "[ifname[:net]]"
1863 */
1864 cmd1->o.len = F_INSN_SIZE(ipfw_insn_ifip);
1865 cmd1->o.opcode = O_IP_DST_IFIP;
1866 cmd1->o.arg1 = 0;
1867 cmd1->addr.s_addr = 0;
1868 cmd1->mask.s_addr = 0;
1869
1870 av[pos] = '\0';
1871 c = strchr(av, ':');
1872 if (c != NULL) {
1873 if (strcmp(c + 1, "net") == 0) {
1874 cmd1->o.arg1 |= IPFW_IFIP_NET;
1875 } else {
1876 errx(EX_DATAERR, "invalid ifname modifier: %s",
1877 c + 1);
1878 }
1879 *c = '\0';
1880 }
1881
1882 strlcpy(cmd1->ifname, &av[1], sizeof(cmd1->ifname));
1883 if (c != NULL)
1884 *c = ':';
1885 av[pos] = ']';
1886 return;
1887 }
1888
1889 p = strchr(av, '/');
1890 if (!p)
1891 p = strchr(av, ':');
1892 if (p) {
1893 md = *p;
1894 *p++ = '\0';
1895 }
1896
1897 if (lookup_host(av, &cmd->addr) != 0)
1898 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1899 switch (md) {
1900 case ':':
1901 if (!inet_aton(p, &cmd->mask))
1902 errx(EX_DATAERR, "bad netmask ``%s''", p);
1903 break;
1904 case '/':
1905 i = atoi(p);
1906 if (i == 0)
1907 cmd->mask.s_addr = htonl(0);
1908 else if (i > 32)
1909 errx(EX_DATAERR, "bad width ``%s''", p);
1910 else
1911 cmd->mask.s_addr = htonl(~0 << (32 - i));
1912 break;
1913 default:
1914 cmd->mask.s_addr = htonl(~0);
1915 break;
1916 }
1917 cmd->addr.s_addr &= cmd->mask.s_addr;
1918 /*
1919 * now look if we have a set of addresses. They are stored as follows:
1920 * arg1 is the set size (powers of 2, 2..256)
1921 * addr is the base address IN HOST FORMAT
1922 * mask.. is an array of u_int32_t with bits set.
1923 */
1924 if (p)
1925 p = strchr(p, '{');
1926 if (p) { /* fetch addresses */
1927 u_int32_t *d;
1928 int low, high;
1929 int ii = contigmask((u_char *)&(cmd->mask), 32);
1930
1931 if (ii < 24 || ii > 31) {
1932 fprintf(stderr, "invalid set with mask %d\n",
1933 ii);
1934 exit(0);
1935 }
1936 cmd->o.arg1 = 1<<(32-ii);
1937 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1938 d = (u_int32_t *)&cmd->mask;
1939 cmd->o.opcode = O_IP_DST_SET; /* default */
1940 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1941 for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++)
1942 d[ii] = 0; /* clear masks */
1943
1944 av = p+1;
1945 low = cmd->addr.s_addr & 0xff;
1946 high = low + cmd->o.arg1 - 1;
1947 while (isdigit(*av)) {
1948 char *str;
1949 u_int16_t a = strtol(av, &str, 0);
1950
1951 if (str == av) /* no parameter */
1952 break;
1953 if (a < low || a > high) {
1954 fprintf(stderr, "addr %d out of range [%d-%d]\n",
1955 a, low, high);
1956 exit(0);
1957 }
1958 a -= low;
1959 d[ a/32] |= 1<<(a & 31);
1960 if (*str != ',')
1961 break;
1962 av = str+1;
1963 }
1964 return;
1965 }
1966
1967 if (cmd->mask.s_addr == 0) { /* any */
1968 if (cmd->o.len & F_NOT)
1969 errx(EX_DATAERR, "not any never matches");
1970 else /* useless, nuke it */
1971 return;
1972 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */
1973 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1974 else /* addr/mask */
1975 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1976 }
1977
1978
1979 /*
1980 * helper function to process a set of flags and set bits in the
1981 * appropriate masks.
1982 */
1983 static void
1984 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1985 struct _s_x *flags, char *p)
1986 {
1987 u_int8_t set=0, clear=0;
1988
1989 while (p && *p) {
1990 char *q; /* points to the separator */
1991 int val;
1992 u_int8_t *which; /* mask we are working on */
1993
1994 if (*p == '!') {
1995 p++;
1996 which = &clear;
1997 } else
1998 which = &set;
1999 q = strchr(p, ',');
2000 if (q)
2001 *q++ = '\0';
2002 val = match_token(flags, p);
2003 if (val <= 0)
2004 errx(EX_DATAERR, "invalid flag %s", p);
2005 *which |= (u_int8_t)val;
2006 p = q;
2007 }
2008 cmd->opcode = opcode;
2009 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2010 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2011 }
2012
2013
2014 static void
2015 delete(int ac, char *av[])
2016 {
2017 u_int32_t rulenum;
2018 struct dn_ioc_pipe pipe;
2019 int i;
2020 int exitval = EX_OK;
2021 int do_set = 0;
2022
2023 memset(&pipe, 0, sizeof pipe);
2024
2025 av++; ac--;
2026 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
2027 do_set = 1; /* delete set */
2028 ac--; av++;
2029 }
2030
2031 /* Rule number */
2032 while (ac && isdigit(**av)) {
2033 i = atoi(*av); av++; ac--;
2034 if (do_pipe) {
2035 if (do_pipe == 1)
2036 pipe.pipe_nr = i;
2037 else
2038 pipe.fs.fs_nr = i;
2039 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
2040 &pipe, sizeof pipe);
2041 if (i) {
2042 exitval = 1;
2043 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
2044 do_pipe == 1 ? pipe.pipe_nr :
2045 pipe.fs.fs_nr);
2046 }
2047 } else {
2048 rulenum = (i & 0xffff) | (do_set << 24);
2049 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
2050 sizeof rulenum);
2051 if (i) {
2052 exitval = EX_UNAVAILABLE;
2053 warn("rule %u: setsockopt(IP_FW_DEL)",
2054 rulenum);
2055 }
2056 }
2057 }
2058 if (exitval != EX_OK)
2059 exit(exitval);
2060 }
2061
2062
2063 /*
2064 * fill the interface structure. We do not check the name as we can
2065 * create interfaces dynamically, so checking them at insert time
2066 * makes relatively little sense.
2067 * Interface names containing '*', '?', or '[' are assumed to be shell
2068 * patterns which match interfaces.
2069 */
2070 static void
2071 fill_iface(ipfw_insn_if *cmd, char *arg)
2072 {
2073 cmd->name[0] = '\0';
2074 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2075
2076 /* Parse the interface or address */
2077 if (!strcmp(arg, "any"))
2078 cmd->o.len = 0; /* effectively ignore this command */
2079 else if (!isdigit(*arg)) {
2080 strlcpy(cmd->name, arg, sizeof(cmd->name));
2081 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2082 } else if (!inet_aton(arg, &cmd->p.ip))
2083 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2084 }
2085
2086 static unsigned long
2087 getbw(const char *str, u_short *flags, int kb)
2088 {
2089 char *end;
2090 unsigned long val;
2091 int inbytes = 0;
2092
2093 val = strtoul(str, &end, 0);
2094 if (*end == 'k' || *end == 'K') {
2095 ++end;
2096 val *= kb;
2097 } else if (*end == 'm' || *end == 'M') {
2098 ++end;
2099 val *= kb * kb;
2100 }
2101
2102 /*
2103 * Deal with bits or bytes or b(bits) or B(bytes). If there is no
2104 * trailer assume bits.
2105 */
2106 if (strncasecmp(end, "bit", 3) == 0) {
2107 ;
2108 } else if (strncasecmp(end, "byte", 4) == 0) {
2109 inbytes = 1;
2110 } else if (*end == 'b') {
2111 ;
2112 } else if (*end == 'B') {
2113 inbytes = 1;
2114 }
2115
2116 /*
2117 * Return in bits if flags is NULL, else flag bits
2118 * or bytes in flags and return the unconverted value.
2119 */
2120 if (inbytes && flags)
2121 *flags |= DN_QSIZE_IS_BYTES;
2122 else if (inbytes && flags == NULL)
2123 val *= 8;
2124 return(val);
2125 }
2126
2127 /*
2128 * the following macro returns an error message if we run out of
2129 * arguments.
2130 */
2131 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
2132
2133 static void
2134 config_pipe(int ac, char **av)
2135 {
2136 struct dn_ioc_pipe pipe;
2137 int i;
2138 char *end;
2139 u_int32_t a;
2140
2141 memset(&pipe, 0, sizeof pipe);
2142
2143 av++; ac--;
2144 /* Pipe number */
2145 if (ac && isdigit(**av)) {
2146 i = atoi(*av); av++; ac--;
2147 if (do_pipe == 1)
2148 pipe.pipe_nr = i;
2149 else
2150 pipe.fs.fs_nr = i;
2151 }
2152 while (ac > 0) {
2153 double d;
2154 int tok = match_token(dummynet_params, *av);
2155 ac--; av++;
2156
2157 switch(tok) {
2158 case TOK_NOERROR:
2159 pipe.fs.flags_fs |= DN_NOERROR;
2160 break;
2161
2162 case TOK_PLR:
2163 NEED1("plr needs argument 0..1\n");
2164 d = strtod(av[0], NULL);
2165 if (d > 1)
2166 d = 1;
2167 else if (d < 0)
2168 d = 0;
2169 pipe.fs.plr = (int)(d*0x7fffffff);
2170 ac--; av++;
2171 break;
2172
2173 case TOK_QUEUE:
2174 NEED1("queue needs queue size\n");
2175 end = NULL;
2176 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2177 ac--; av++;
2178 break;
2179
2180 case TOK_BUCKETS:
2181 NEED1("buckets needs argument\n");
2182 pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2183 ac--; av++;
2184 break;
2185
2186 case TOK_MASK:
2187 NEED1("mask needs mask specifier\n");
2188 /*
2189 * per-flow queue, mask is dst_ip, dst_port,
2190 * src_ip, src_port, proto measured in bits
2191 */
2192
2193 pipe.fs.flow_mask.type = ETHERTYPE_IP;
2194 pipe.fs.flow_mask.u.ip.dst_ip = 0;
2195 pipe.fs.flow_mask.u.ip.src_ip = 0;
2196 pipe.fs.flow_mask.u.ip.dst_port = 0;
2197 pipe.fs.flow_mask.u.ip.src_port = 0;
2198 pipe.fs.flow_mask.u.ip.proto = 0;
2199 end = NULL;
2200
2201 while (ac >= 1) {
2202 u_int32_t *p32 = NULL;
2203 u_int16_t *p16 = NULL;
2204
2205 tok = match_token(dummynet_params, *av);
2206 ac--; av++;
2207 switch(tok) {
2208 case TOK_ALL:
2209 /*
2210 * special case, all bits significant
2211 */
2212 pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2213 pipe.fs.flow_mask.u.ip.src_ip = ~0;
2214 pipe.fs.flow_mask.u.ip.dst_port = ~0;
2215 pipe.fs.flow_mask.u.ip.src_port = ~0;
2216 pipe.fs.flow_mask.u.ip.proto = ~0;
2217 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2218 goto end_mask;
2219
2220 case TOK_DSTIP:
2221 p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2222 break;
2223
2224 case TOK_SRCIP:
2225 p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2226 break;
2227
2228 case TOK_DSTPORT:
2229 p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2230 break;
2231
2232 case TOK_SRCPORT:
2233 p16 = &pipe.fs.flow_mask.u.ip.src_port;
2234 break;
2235
2236 case TOK_PROTO:
2237 break;
2238
2239 default:
2240 ac++; av--; /* backtrack */
2241 goto end_mask;
2242 }
2243 if (ac < 1)
2244 errx(EX_USAGE, "mask: value missing");
2245 if (*av[0] == '/') {
2246 a = strtoul(av[0]+1, &end, 0);
2247 a = (a == 32) ? ~0 : (1 << a) - 1;
2248 } else
2249 a = strtoul(av[0], &end, 0);
2250 if (p32 != NULL)
2251 *p32 = a;
2252 else if (p16 != NULL) {
2253 if (a > 65535)
2254 errx(EX_DATAERR,
2255 "mask: must be 16 bit");
2256 *p16 = (u_int16_t)a;
2257 } else {
2258 if (a > 255)
2259 errx(EX_DATAERR,
2260 "mask: must be 8 bit");
2261 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2262 }
2263 if (a != 0)
2264 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2265 ac--; av++;
2266 } /* end while, config masks */
2267 end_mask:
2268 break;
2269
2270 case TOK_RED:
2271 case TOK_GRED:
2272 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2273 pipe.fs.flags_fs |= DN_IS_RED;
2274 if (tok == TOK_GRED)
2275 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2276 /*
2277 * the format for parameters is w_q/min_th/max_th/max_p
2278 */
2279 if ((end = strsep(&av[0], "/"))) {
2280 double w_q = strtod(end, NULL);
2281 if (w_q > 1 || w_q <= 0)
2282 errx(EX_DATAERR, "0 < w_q <= 1");
2283 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2284 }
2285 if ((end = strsep(&av[0], "/"))) {
2286 pipe.fs.min_th = strtoul(end, &end, 0);
2287 if (*end == 'K' || *end == 'k')
2288 pipe.fs.min_th *= 1024;
2289 }
2290 if ((end = strsep(&av[0], "/"))) {
2291 pipe.fs.max_th = strtoul(end, &end, 0);
2292 if (*end == 'K' || *end == 'k')
2293 pipe.fs.max_th *= 1024;
2294 }
2295 if ((end = strsep(&av[0], "/"))) {
2296 double max_p = strtod(end, NULL);
2297 if (max_p > 1 || max_p <= 0)
2298 errx(EX_DATAERR, "0 < max_p <= 1");
2299 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2300 }
2301 ac--; av++;
2302 break;
2303
2304 case TOK_DROPTAIL:
2305 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2306 break;
2307
2308 case TOK_BW:
2309 NEED1("bw needs bandwidth\n");
2310 if (do_pipe != 1)
2311 errx(EX_DATAERR, "bandwidth only valid for pipes");
2312 /*
2313 * set bandwidth value
2314 */
2315 pipe.bandwidth = getbw(av[0], NULL, 1000);
2316 if (pipe.bandwidth < 0)
2317 errx(EX_DATAERR, "bandwidth too large");
2318 ac--; av++;
2319 break;
2320
2321 case TOK_DELAY:
2322 if (do_pipe != 1)
2323 errx(EX_DATAERR, "delay only valid for pipes");
2324 NEED1("delay needs argument 0..10000ms\n");
2325 pipe.delay = strtoul(av[0], NULL, 0);
2326 ac--; av++;
2327 break;
2328
2329 case TOK_WEIGHT:
2330 if (do_pipe == 1)
2331 errx(EX_DATAERR,"weight only valid for queues");
2332 NEED1("weight needs argument 0..100\n");
2333 pipe.fs.weight = strtoul(av[0], &end, 0);
2334 ac--; av++;
2335 break;
2336
2337 case TOK_PIPE:
2338 if (do_pipe == 1)
2339 errx(EX_DATAERR,"pipe only valid for queues");
2340 NEED1("pipe needs pipe_number\n");
2341 pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2342 ac--; av++;
2343 break;
2344
2345 default:
2346 errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2347 }
2348 }
2349 if (do_pipe == 1) {
2350 if (pipe.pipe_nr == 0)
2351 errx(EX_DATAERR, "pipe_nr must be > 0");
2352 if (pipe.delay > 10000)
2353 errx(EX_DATAERR, "delay must be < 10000");
2354 } else { /* do_pipe == 2, queue */
2355 if (pipe.fs.parent_nr == 0)
2356 errx(EX_DATAERR, "pipe must be > 0");
2357 if (pipe.fs.weight >100)
2358 errx(EX_DATAERR, "weight must be <= 100");
2359 }
2360 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2361 if (pipe.fs.qsize > 1024*1024)
2362 errx(EX_DATAERR, "queue size must be < 1MB");
2363 } else {
2364 if (pipe.fs.qsize > 100)
2365 errx(EX_DATAERR, "2 <= queue size <= 100");
2366 }
2367 if (pipe.fs.flags_fs & DN_IS_RED) {
2368 size_t len;
2369 int lookup_depth, avg_pkt_size;
2370 double step, idle, weight, w_q;
2371 int clock_hz;
2372 int t;
2373
2374 if (pipe.fs.min_th >= pipe.fs.max_th)
2375 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2376 pipe.fs.min_th, pipe.fs.max_th);
2377 if (pipe.fs.max_th == 0)
2378 errx(EX_DATAERR, "max_th must be > 0");
2379
2380 len = sizeof(int);
2381 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2382 &lookup_depth, &len, NULL, 0) == -1)
2383
2384 errx(1, "sysctlbyname(\"%s\")",
2385 "net.inet.ip.dummynet.red_lookup_depth");
2386 if (lookup_depth == 0)
2387 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2388 " must be greater than zero");
2389
2390 len = sizeof(int);
2391 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2392 &avg_pkt_size, &len, NULL, 0) == -1)
2393
2394 errx(1, "sysctlbyname(\"%s\")",
2395 "net.inet.ip.dummynet.red_avg_pkt_size");
2396 if (avg_pkt_size == 0)
2397 errx(EX_DATAERR,
2398 "net.inet.ip.dummynet.red_avg_pkt_size must"
2399 " be greater than zero");
2400
2401 len = sizeof(clock_hz);
2402 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2403 NULL, 0) == -1) {
2404 errx(1, "sysctlbyname(\"%s\")",
2405 "net.inet.ip.dummynet.hz");
2406 }
2407
2408 /*
2409 * Ticks needed for sending a medium-sized packet.
2410 * Unfortunately, when we are configuring a WF2Q+ queue, we
2411 * do not have bandwidth information, because that is stored
2412 * in the parent pipe, and also we have multiple queues
2413 * competing for it. So we set step=0, which is not very
2414 * correct. But on the other hand, why do we want RED with
2415 * WF2Q+ ?
2416 */
2417 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2418 step = 0;
2419 else
2420 step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2421
2422 /*
2423 * max idle time (in ticks) before avg queue size becomes 0.
2424 * NOTA: (3/w_q) is approx the value x so that
2425 * (1-w_q)^x < 10^-3.
2426 */
2427 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2428 idle = step * 3. / w_q;
2429 pipe.fs.lookup_step = (int)idle / lookup_depth;
2430 if (!pipe.fs.lookup_step)
2431 pipe.fs.lookup_step = 1;
2432 weight = 1 - w_q;
2433 for (t = pipe.fs.lookup_step; t > 0; --t)
2434 weight *= weight;
2435 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2436 }
2437 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2438 sizeof pipe);
2439 if (i)
2440 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2441 }
2442
2443 static void
2444 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2445 {
2446 int i, l;
2447
2448 for (i=0; i<6; i++)
2449 addr[i] = mask[i] = 0;
2450 if (!strcmp(p, "any"))
2451 return;
2452
2453 for (i=0; *p && i<6;i++, p++) {
2454 addr[i] = strtol(p, &p, 16);
2455 if (*p != ':') /* we start with the mask */
2456 break;
2457 }
2458 if (*p == '/') { /* mask len */
2459 l = strtol(p+1, &p, 0);
2460 for (i=0; l>0; l -=8, i++)
2461 mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2462 } else if (*p == '&') { /* mask */
2463 for (i=0, p++; *p && i<6;i++, p++) {
2464 mask[i] = strtol(p, &p, 16);
2465 if (*p != ':')
2466 break;
2467 }
2468 } else if (*p == '\0') {
2469 for (i=0; i<6; i++)
2470 mask[i] = 0xff;
2471 }
2472 for (i=0; i<6; i++)
2473 addr[i] &= mask[i];
2474 }
2475
2476 /*
2477 * helper function, updates the pointer to cmd with the length
2478 * of the current command, and also cleans up the first word of
2479 * the new command in case it has been clobbered before.
2480 */
2481 static ipfw_insn *
2482 next_cmd(ipfw_insn *cmd)
2483 {
2484 cmd += F_LEN(cmd);
2485 bzero(cmd, sizeof(*cmd));
2486 return cmd;
2487 }
2488
2489 /*
2490 * A function to fill simple commands of size 1.
2491 * Existing flags are preserved.
2492 */
2493 static void
2494 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2495 {
2496 cmd->opcode = opcode;
2497 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2498 cmd->arg1 = arg;
2499 }
2500
2501 /*
2502 * Fetch and add the MAC address and type, with masks. This generates one or
2503 * two microinstructions, and returns the pointer to the last one.
2504 */
2505 static ipfw_insn *
2506 add_mac(ipfw_insn *cmd, int ac, char *av[])
2507 {
2508 ipfw_insn_mac *mac;
2509
2510 if (ac < 2)
2511 errx(EX_DATAERR, "MAC dst src");
2512
2513 cmd->opcode = O_MACADDR2;
2514 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2515
2516 mac = (ipfw_insn_mac *)cmd;
2517 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2518 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2519 return cmd;
2520 }
2521
2522 static ipfw_insn *
2523 add_mactype(ipfw_insn *cmd, int ac, char *av)
2524 {
2525 if (ac < 1)
2526 errx(EX_DATAERR, "missing MAC type");
2527 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2528 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2529 cmd->opcode = O_MAC_TYPE;
2530 return cmd;
2531 } else
2532 return NULL;
2533 }
2534
2535 static ipfw_insn *
2536 add_proto(ipfw_insn *cmd, char *av)
2537 {
2538 struct protoent *pe;
2539 u_char proto = 0;
2540
2541 if (!strncmp(av, "all", strlen(av)))
2542 ; /* same as "ip" */
2543 else if ((proto = atoi(av)) > 0)
2544 ; /* all done! */
2545 else if ((pe = getprotobyname(av)) != NULL)
2546 proto = pe->p_proto;
2547 else
2548 return NULL;
2549 if (proto != IPPROTO_IP)
2550 fill_cmd(cmd, O_PROTO, 0, proto);
2551 return cmd;
2552 }
2553
2554 static ipfw_insn *
2555 add_srcip(ipfw_insn *cmd, char *av)
2556 {
2557 fill_ip((ipfw_insn_ip *)cmd, av);
2558 if (cmd->opcode == O_IP_DST_SET) /* set */
2559 cmd->opcode = O_IP_SRC_SET;
2560 else if (cmd->opcode == O_IP_DST_TABLE) /* table */
2561 cmd->opcode = O_IP_SRC_TABLE;
2562 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */
2563 cmd->opcode = O_IP_SRC_IFIP;
2564 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2565 cmd->opcode = O_IP_SRC_ME;
2566 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2567 cmd->opcode = O_IP_SRC;
2568 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2569 cmd->opcode = O_IP_SRC_MASK;
2570 return cmd;
2571 }
2572
2573 static ipfw_insn *
2574 add_dstip(ipfw_insn *cmd, char *av)
2575 {
2576 fill_ip((ipfw_insn_ip *)cmd, av);
2577 if (cmd->opcode == O_IP_DST_SET) /* set */
2578 ;
2579 else if (cmd->opcode == O_IP_DST_TABLE) /* table */
2580 ;
2581 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */
2582 ;
2583 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2584 cmd->opcode = O_IP_DST_ME;
2585 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2586 cmd->opcode = O_IP_DST;
2587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2588 cmd->opcode = O_IP_DST_MASK;
2589 return cmd;
2590 }
2591
2592 static ipfw_insn *
2593 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2594 {
2595 if (!strncmp(av, "any", strlen(av))) {
2596 return NULL;
2597 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2598 /* XXX todo: check that we have a protocol with ports */
2599 cmd->opcode = opcode;
2600 return cmd;
2601 }
2602 return NULL;
2603 }
2604
2605 static void
2606 fill_rdr(ipfw_insn *cmd, char *av)
2607 {
2608 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd;
2609 char *p;
2610
2611 cmd->opcode = O_REDIRECT;
2612 cmd->len = F_INSN_SIZE(ipfw_insn_rdr);
2613 cmd->arg1 = 0;
2614 c->addr.s_addr = INADDR_ANY;
2615 c->port = 0;
2616 c->set = UINT16_MAX;
2617
2618 p = strchr(av, ',');
2619 if (p == NULL)
2620 p = strchr(av, ':');
2621 if (p != NULL)
2622 *p = '\0';
2623 lookup_host(av, &c->addr);
2624
2625 if (p != NULL && *(p + 1) != '\0') {
2626 char *ep;
2627
2628 c->port = strtoul(p + 1, &ep, 0);
2629 if (*ep != '\0')
2630 errx(EX_DATAERR, "illegal port %s", p + 1);
2631 c->port = htons(c->port);
2632 }
2633 }
2634
2635 /*
2636 * Parse arguments and assemble the microinstructions which make up a rule.
2637 * Rules are added into the 'rulebuf' and then copied in the correct order
2638 * into the actual rule.
2639 *
2640 * The syntax for a rule starts with the action, followed by an
2641 * optional log action, and the various match patterns.
2642 * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2643 * (generated if the rule includes a keep-state option), then the
2644 * various match patterns, the "log" action, and the actual action.
2645 *
2646 */
2647 static void
2648 add(int ac, char *av[])
2649 {
2650 /*
2651 * rules are added into the 'rulebuf' and then copied in
2652 * the correct order into the actual rule.
2653 * Some things that need to go out of order (prob, action etc.)
2654 * go into actbuf[].
2655 */
2656 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2657 static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2658 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2659
2660 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2661 ipfw_insn *first_cmd; /* first match pattern */
2662
2663 struct ipfw_ioc_rule *rule;
2664
2665 /*
2666 * various flags used to record that we entered some fields.
2667 */
2668 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2669
2670 int i;
2671
2672 int open_par = 0; /* open parenthesis ( */
2673
2674 int has_dstport = 0;
2675 int has_recv = 0;
2676
2677 /* proto is here because it is used to fetch ports */
2678 u_char proto = IPPROTO_IP; /* default protocol */
2679
2680 double match_prob = 1; /* match probability, default is always match */
2681
2682 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2683 bzero(cmdbuf, sizeof(cmdbuf));
2684 bzero(rulebuf, sizeof(rulebuf));
2685
2686 rule = (struct ipfw_ioc_rule *)rulebuf;
2687 cmd = (ipfw_insn *)cmdbuf;
2688 action = (ipfw_insn *)actbuf;
2689
2690 av++; ac--;
2691
2692 /* [rule N] -- Rule number optional */
2693 if (ac && isdigit(**av)) {
2694 rule->rulenum = atoi(*av);
2695 av++;
2696 ac--;
2697 }
2698
2699 /* [set N] -- set number (0..30), optional */
2700 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2701 int set = strtoul(av[1], NULL, 10);
2702 if (set < 0 || set > 30)
2703 errx(EX_DATAERR, "illegal set %s", av[1]);
2704 rule->set = set;
2705 av += 2; ac -= 2;
2706 }
2707
2708 /* [prob D] -- match probability, optional */
2709 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2710 match_prob = strtod(av[1], NULL);
2711
2712 if (match_prob <= 0 || match_prob > 1)
2713 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2714 av += 2; ac -= 2;
2715 }
2716
2717 /* action -- mandatory */
2718 NEED1("missing action");
2719 i = match_token(rule_actions, *av);
2720 ac--; av++;
2721 action->len = 1; /* default */
2722 switch(i) {
2723 case TOK_CHECKSTATE:
2724 have_state = action;
2725 action->opcode = O_CHECK_STATE;
2726 break;
2727
2728 case TOK_ACCEPT:
2729 action->opcode = O_ACCEPT;
2730 break;
2731
2732 case TOK_DEFRAG:
2733 action->opcode = O_DEFRAG;
2734 action->arg1 = 0;
2735 break;
2736
2737 case TOK_DENY:
2738 action->opcode = O_DENY;
2739 action->arg1 = 0;
2740 break;
2741
2742 case TOK_REJECT:
2743 action->opcode = O_REJECT;
2744 action->arg1 = ICMP_UNREACH_HOST;
2745 break;
2746
2747 case TOK_RESET:
2748 action->opcode = O_REJECT;
2749 action->arg1 = ICMP_REJECT_RST;
2750 break;
2751
2752 case TOK_UNREACH:
2753 action->opcode = O_REJECT;
2754 NEED1("missing reject code");
2755 fill_reject_code(&action->arg1, *av);
2756 ac--; av++;
2757 break;
2758
2759 case TOK_COUNT:
2760 action->opcode = O_COUNT;
2761 break;
2762
2763 case TOK_QUEUE:
2764 case TOK_PIPE:
2765 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2766 case TOK_SKIPTO:
2767 if (i == TOK_QUEUE)
2768 action->opcode = O_QUEUE;
2769 else if (i == TOK_PIPE)
2770 action->opcode = O_PIPE;
2771 else if (i == TOK_SKIPTO)
2772 action->opcode = O_SKIPTO;
2773 NEED1("missing skipto/pipe/queue number");
2774 action->arg1 = strtoul(*av, NULL, 10);
2775 av++; ac--;
2776 break;
2777
2778 case TOK_DIVERT:
2779 case TOK_TEE:
2780 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2781 NEED1("missing divert/tee port");
2782 action->arg1 = strtoul(*av, NULL, 0);
2783 if (action->arg1 == 0) {
2784 struct servent *serv;
2785 setservent(1);
2786 serv = getservbyname(av[0], "divert");
2787 if (serv != NULL)
2788 action->arg1 = ntohs(serv->s_port);
2789 else
2790 errx(EX_DATAERR, "illegal divert/tee port");
2791 }
2792 ac--; av++;
2793 break;
2794
2795 case TOK_FORWARD: {
2796 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2797 char *st, *end;
2798
2799 NEED1("missing forward address[:port]");
2800
2801 action->opcode = O_FORWARD_IP;
2802 action->len = F_INSN_SIZE(ipfw_insn_sa);
2803
2804 p->sa.sin_len = sizeof(struct sockaddr_in);
2805 p->sa.sin_family = AF_INET;
2806 p->sa.sin_port = 0;
2807 /*
2808 * locate the address-port separator (':' or ',')
2809 */
2810 st = strchr(*av, ':');
2811 if (st == NULL)
2812 st = strchr(*av, ',');
2813 if (st != NULL) {
2814 *(st++) = '\0';
2815 i = strtoport(st, &end, 0 /* base */, 0 /* proto */);
2816 if (st == end)
2817 errx(EX_DATAERR,
2818 "illegal forwarding port ``%s''", st);
2819 p->sa.sin_port = (u_short)i;
2820 }
2821 lookup_host(*av, &(p->sa.sin_addr));
2822 }
2823 ac--; av++;
2824 break;
2825
2826 default:
2827 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2828 }
2829 action = next_cmd(action);
2830
2831 /*
2832 * [log [logamount N]] -- log, optional
2833 *
2834 * If exists, it goes first in the cmdbuf, but then it is
2835 * skipped in the copy section to the end of the buffer.
2836 */
2837 if (ac && !strncmp(*av, "log", strlen(*av))) {
2838 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2839
2840 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2841 cmd->opcode = O_LOG;
2842 av++; ac--;
2843 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2844 ac--; av++;
2845 NEED1("logamount requires argument");
2846 c->max_log = atoi(*av);
2847 ac--; av++;
2848 }
2849 cmd = next_cmd(cmd);
2850 }
2851
2852 if (have_state) /* must be a check-state, we are done */
2853 goto done;
2854
2855 #define OR_START(target) \
2856 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2857 if (open_par) \
2858 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2859 prev = NULL; \
2860 open_par = 1; \
2861 if ( (av[0])[1] == '\0') { \
2862 ac--; av++; \
2863 } else \
2864 (*av)++; \
2865 } \
2866 target: \
2867
2868
2869 #define CLOSE_PAR \
2870 if (open_par) { \
2871 if (ac && ( \
2872 !strncmp(*av, ")", strlen(*av)) || \
2873 !strncmp(*av, "}", strlen(*av)) )) { \
2874 prev = NULL; \
2875 open_par = 0; \
2876 ac--; av++; \
2877 } else \
2878 errx(EX_USAGE, "missing \")\"\n"); \
2879 }
2880
2881 #define NOT_BLOCK \
2882 if (ac && !strncmp(*av, "not", strlen(*av))) { \
2883 if (cmd->len & F_NOT) \
2884 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2885 cmd->len |= F_NOT; \
2886 ac--; av++; \
2887 }
2888
2889 #define OR_BLOCK(target) \
2890 if (ac && !strncmp(*av, "or", strlen(*av))) { \
2891 if (prev == NULL || open_par == 0) \
2892 errx(EX_DATAERR, "invalid OR block"); \
2893 prev->len |= F_OR; \
2894 ac--; av++; \
2895 goto target; \
2896 } \
2897 CLOSE_PAR;
2898
2899 first_cmd = cmd;
2900
2901 #if 0
2902 /*
2903 * MAC addresses, optional.
2904 * If we have this, we skip the part "proto from src to dst"
2905 * and jump straight to the option parsing.
2906 */
2907 NOT_BLOCK;
2908 NEED1("missing protocol");
2909 if (!strncmp(*av, "MAC", strlen(*av)) ||
2910 !strncmp(*av, "mac", strlen(*av))) {
2911 ac--; av++; /* the "MAC" keyword */
2912 add_mac(cmd, ac, av); /* exits in case of errors */
2913 cmd = next_cmd(cmd);
2914 ac -= 2; av += 2; /* dst-mac and src-mac */
2915 NOT_BLOCK;
2916 NEED1("missing mac type");
2917 if (add_mactype(cmd, ac, av[0]))
2918 cmd = next_cmd(cmd);
2919 ac--; av++; /* any or mac-type */
2920 goto read_options;
2921 }
2922 #endif
2923
2924 /*
2925 * protocol, mandatory
2926 */
2927 OR_START(get_proto);
2928 NOT_BLOCK;
2929 NEED1("missing protocol");
2930 if (add_proto(cmd, *av)) {
2931 av++; ac--;
2932 if (F_LEN(cmd) == 0) /* plain IP */
2933 proto = 0;
2934 else {
2935 proto = cmd->arg1;
2936 prev = cmd;
2937 cmd = next_cmd(cmd);
2938 }
2939 } else if (first_cmd != cmd) {
2940 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2941 } else
2942 goto read_options;
2943 OR_BLOCK(get_proto);
2944
2945 /*
2946 * "from", mandatory
2947 */
2948 if (!ac || strncmp(*av, "from", strlen(*av)))
2949 errx(EX_USAGE, "missing ``from''");
2950 ac--; av++;
2951
2952 /*
2953 * source IP, mandatory
2954 */
2955 OR_START(source_ip);
2956 NOT_BLOCK; /* optional "not" */
2957 NEED1("missing source address");
2958 if (add_srcip(cmd, *av)) {
2959 ac--; av++;
2960 if (F_LEN(cmd) != 0) { /* ! any */
2961 prev = cmd;
2962 cmd = next_cmd(cmd);
2963 }
2964 }
2965 OR_BLOCK(source_ip);
2966
2967 /*
2968 * source ports, optional
2969 */
2970 NOT_BLOCK; /* optional "not" */
2971 if (ac) {
2972 if (!strncmp(*av, "any", strlen(*av)) ||
2973 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2974 ac--; av++;
2975 if (F_LEN(cmd) != 0)
2976 cmd = next_cmd(cmd);
2977 }
2978 }
2979
2980 /*
2981 * "to", mandatory
2982 */
2983 if (!ac || strncmp(*av, "to", strlen(*av)))
2984 errx(EX_USAGE, "missing ``to''");
2985 av++; ac--;
2986
2987 /*
2988 * destination, mandatory
2989 */
2990 OR_START(dest_ip);
2991 NOT_BLOCK; /* optional "not" */
2992 NEED1("missing dst address");
2993 if (add_dstip(cmd, *av)) {
2994 ac--; av++;
2995 if (F_LEN(cmd) != 0) { /* ! any */
2996 prev = cmd;
2997 cmd = next_cmd(cmd);
2998 }
2999 }
3000 OR_BLOCK(dest_ip);
3001
3002 /*
3003 * dest. ports, optional
3004 */
3005 NOT_BLOCK; /* optional "not" */
3006 if (ac) {
3007 if (!strncmp(*av, "any", strlen(*av)) ||
3008 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3009 ac--; av++;
3010 if (F_LEN(cmd) != 0) {
3011 has_dstport = 1;
3012 cmd = next_cmd(cmd);
3013 }
3014 }
3015 }
3016
3017 read_options:
3018 if (ac && first_cmd == cmd) {
3019 /*
3020 * nothing specified so far, store in the rule to ease
3021 * printout later.
3022 */
3023 rule->usr_flags = IPFW_USR_F_NORULE;
3024 }
3025 prev = NULL;
3026 while (ac) {
3027 char *s1;
3028 ipfw_insn_u32 *cmd32; /* alias for cmd */
3029
3030 s1 = *av;
3031 cmd32 = (ipfw_insn_u32 *)cmd;
3032
3033 if (*s1 == '!') { /* alternate syntax for NOT */
3034 if (cmd->len & F_NOT)
3035 errx(EX_USAGE, "double \"not\" not allowed\n");
3036 cmd->len = F_NOT;
3037 s1++;
3038 }
3039 i = match_token(rule_options, s1);
3040 ac--; av++;
3041 switch(i) {
3042 case TOK_NOT:
3043 if (cmd->len & F_NOT)
3044 errx(EX_USAGE, "double \"not\" not allowed\n");
3045 cmd->len = F_NOT;
3046 break;
3047
3048 case TOK_OR:
3049 if (open_par == 0 || prev == NULL)
3050 errx(EX_USAGE, "invalid \"or\" block\n");
3051 prev->len |= F_OR;
3052 break;
3053
3054 case TOK_STARTBRACE:
3055 if (open_par)
3056 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3057 open_par = 1;
3058 break;
3059
3060 case TOK_ENDBRACE:
3061 if (!open_par)
3062 errx(EX_USAGE, "+missing \")\"\n");
3063 open_par = 0;
3064 prev = NULL;
3065 break;
3066
3067 case TOK_IN:
3068 fill_cmd(cmd, O_IN, 0, 0);
3069 break;
3070
3071 case TOK_OUT:
3072 cmd->len ^= F_NOT; /* toggle F_NOT */
3073 fill_cmd(cmd, O_IN, 0, 0);
3074 break;
3075
3076 case TOK_FRAG:
3077 fill_cmd(cmd, O_FRAG, 0, 0);
3078 break;
3079
3080 case TOK_IPFRAG:
3081 fill_cmd(cmd, O_IPFRAG, 0, 0);
3082 break;
3083
3084 case TOK_LAYER2:
3085 fill_cmd(cmd, O_LAYER2, 0, 0);
3086 break;
3087
3088 case TOK_XMIT:
3089 case TOK_RECV:
3090 case TOK_VIA:
3091 NEED1("recv, xmit, via require interface name"
3092 " or address");
3093 fill_iface((ipfw_insn_if *)cmd, av[0]);
3094 ac--; av++;
3095 if (F_LEN(cmd) == 0) /* not a valid address */
3096 break;
3097 if (i == TOK_XMIT)
3098 cmd->opcode = O_XMIT;
3099 else if (i == TOK_RECV) {
3100 cmd->opcode = O_RECV;
3101 has_recv = 1;
3102 } else if (i == TOK_VIA)
3103 cmd->opcode = O_VIA;
3104 break;
3105
3106 case TOK_ICMPTYPES:
3107 NEED1("icmptypes requires list of types");
3108 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3109 av++; ac--;
3110 break;
3111
3112 case TOK_IPTTL:
3113 NEED1("ipttl requires TTL");
3114 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3115 ac--; av++;
3116 break;
3117
3118 case TOK_IPID:
3119 NEED1("ipid requires length");
3120 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3121 ac--; av++;
3122 break;
3123
3124 case TOK_IPLEN:
3125 NEED1("iplen requires length");
3126 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3127 ac--; av++;
3128 break;
3129
3130 case TOK_IPVER:
3131 NEED1("ipver requires version");
3132 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3133 ac--; av++;
3134 break;
3135
3136 case TOK_IPPRECEDENCE:
3137 NEED1("ipprecedence requires value");
3138 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3139 (strtoul(*av, NULL, 0) & 7) << 5);
3140 ac--; av++;
3141 break;
3142
3143 case TOK_IPOPTS:
3144 NEED1("missing argument for ipoptions");
3145 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3146 ac--; av++;
3147 break;
3148
3149 case TOK_IPTOS:
3150 NEED1("missing argument for iptos");
3151 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3152 ac--; av++;
3153 break;
3154
3155 case TOK_UID:
3156 NEED1("uid requires argument");
3157 {
3158 char *end;
3159 uid_t uid;
3160 struct passwd *pwd;
3161
3162 cmd->opcode = O_UID;
3163 uid = strtoul(*av, &end, 0);
3164 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3165 if (pwd == NULL)
3166 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3167 cmd32->d[0] = pwd->pw_uid;
3168 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3169 ac--; av++;
3170 }
3171 break;
3172
3173 case TOK_GID:
3174 NEED1("gid requires argument");
3175 {
3176 char *end;
3177 gid_t gid;
3178 struct group *grp;
3179
3180 cmd->opcode = O_GID;
3181 gid = strtoul(*av, &end, 0);
3182 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3183 if (grp == NULL)
3184 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3185 cmd32->d[0] = grp->gr_gid;
3186 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3187 ac--; av++;
3188 }
3189 break;
3190
3191 case TOK_ESTAB:
3192 fill_cmd(cmd, O_ESTAB, 0, 0);
3193 break;
3194
3195 case TOK_SETUP:
3196 fill_cmd(cmd, O_TCPFLAGS, 0,
3197 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3198 break;
3199
3200 case TOK_TCPOPTS:
3201 NEED1("missing argument for tcpoptions");
3202 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3203 ac--; av++;
3204 break;
3205
3206 case TOK_TCPSEQ:
3207 case TOK_TCPACK:
3208 NEED1("tcpseq/tcpack requires argument");
3209 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3210 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3211 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3212 ac--; av++;
3213 break;
3214
3215 case TOK_TCPWIN:
3216 NEED1("tcpwin requires length");
3217 fill_cmd(cmd, O_TCPWIN, 0,
3218 htons(strtoul(*av, NULL, 0)));
3219 ac--; av++;
3220 break;
3221
3222 case TOK_TCPFLAGS:
3223 NEED1("missing argument for tcpflags");
3224 cmd->opcode = O_TCPFLAGS;
3225 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3226 ac--; av++;
3227 break;
3228
3229 case TOK_REDIRECT:
3230 if (open_par)
3231 errx(EX_USAGE, "rdr cannot be part "
3232 "of an or block");
3233 if (have_state) {
3234 errx(EX_USAGE, "only one of rdr, keep-state "
3235 "and limit is allowed");
3236 }
3237 have_state = cmd;
3238 NEED1("rdr needs address and port");
3239 fill_rdr(cmd, *av);
3240 ac--; av++;
3241 break;
3242
3243 case TOK_KEEPSTATE:
3244 if (open_par)
3245 errx(EX_USAGE, "keep-state cannot be part "
3246 "of an or block");
3247 if (have_state) {
3248 errx(EX_USAGE, "only one of rdr, keep-state "
3249 "and limit is allowed");
3250 }
3251 have_state = cmd;
3252 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3253 break;
3254
3255 case TOK_LIMIT:
3256 if (open_par)
3257 errx(EX_USAGE, "limit cannot be part "
3258 "of an or block");
3259 if (have_state) {
3260 errx(EX_USAGE, "only one of rdr, keep-state "
3261 "and limit is allowed");
3262 }
3263 NEED1("limit needs mask and # of connections");
3264 have_state = cmd;
3265 {
3266 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3267
3268 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3269 cmd->opcode = O_LIMIT;
3270 c->limit_mask = 0;
3271 c->conn_limit = 0;
3272 for (; ac >1 ;) {
3273 int val;
3274
3275 val = match_token(limit_masks, *av);
3276 if (val <= 0)
3277 break;
3278 c->limit_mask |= val;
3279 ac--; av++;
3280 }
3281 c->conn_limit = atoi(*av);
3282 if (c->conn_limit == 0)
3283 errx(EX_USAGE, "limit: limit must be >0");
3284 if (c->limit_mask == 0)
3285 errx(EX_USAGE, "missing limit mask");
3286 ac--; av++;
3287 }
3288 break;
3289
3290 case TOK_PROTO:
3291 NEED1("missing protocol");
3292 if (add_proto(cmd, *av)) {
3293 proto = cmd->arg1;
3294 ac--; av++;
3295 } else
3296 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3297 break;
3298
3299 case TOK_SRCIP:
3300 NEED1("missing source IP");
3301 if (add_srcip(cmd, *av)) {
3302 ac--; av++;
3303 }
3304 break;
3305
3306 case TOK_DSTIP:
3307 NEED1("missing destination IP");
3308 if (add_dstip(cmd, *av)) {
3309 ac--; av++;
3310 }
3311 break;
3312
3313 case TOK_SRCPORT:
3314 NEED1("missing source port");
3315 if (!strncmp(*av, "any", strlen(*av)) ||
3316 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3317 ac--; av++;
3318 } else
3319 errx(EX_DATAERR, "invalid source port %s", *av);
3320 break;
3321
3322 case TOK_DSTPORT:
3323 NEED1("missing destination port");
3324 if (!strncmp(*av, "any", strlen(*av)) ||
3325 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3326 if (F_LEN(cmd) != 0)
3327 has_dstport =1;
3328 ac--; av++;
3329 } else
3330 errx(EX_DATAERR, "invalid destination port %s",
3331 *av);
3332 break;
3333
3334 case TOK_MAC:
3335 if (ac < 2)
3336 errx(EX_USAGE, "MAC dst-mac src-mac");
3337 if (add_mac(cmd, ac, av)) {
3338 ac -= 2; av += 2;
3339 }
3340 break;
3341
3342 case TOK_MACTYPE:
3343 NEED1("missing mac type");
3344 if (!add_mactype(cmd, ac, *av))
3345 errx(EX_DATAERR, "invalid mac type %s", *av);
3346 ac--; av++;
3347 break;
3348
3349 default:
3350 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1);
3351 }
3352 if (F_LEN(cmd) > 0) { /* prepare to advance */
3353 prev = cmd;
3354 cmd = next_cmd(cmd);
3355 }
3356 }
3357
3358 done:
3359 /*
3360 * Now copy stuff into the rule.
3361 * If we have a keep-state option, the first instruction
3362 * must be a PROBE_STATE (which is generated here).
3363 * If we have a LOG option, it was stored as the first command,
3364 * and now must be moved to the top of the action part.
3365 */
3366 dst = (ipfw_insn *)rule->cmd;
3367
3368 /*
3369 * First thing to write into the command stream is the match probability.
3370 */
3371 if (match_prob != 1) { /* 1 means always match */
3372 dst->opcode = O_PROB;
3373 dst->len = 2;
3374 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3375 dst += dst->len;
3376 }
3377
3378 /*
3379 * generate O_PROBE_STATE if necessary
3380 */
3381 if (have_state && have_state->opcode != O_CHECK_STATE) {
3382 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3383 dst = next_cmd(dst);
3384 }
3385 /*
3386 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_REDIRECT
3387 */
3388 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3389 i = F_LEN(src);
3390
3391 switch (src->opcode) {
3392 case O_LOG:
3393 case O_KEEP_STATE:
3394 case O_LIMIT:
3395 case O_REDIRECT:
3396 break;
3397 default:
3398 bcopy(src, dst, i * sizeof(u_int32_t));
3399 dst += i;
3400 }
3401 }
3402
3403 /*
3404 * put back the have_state command as last opcode
3405 */
3406 if (have_state && have_state->opcode != O_CHECK_STATE) {
3407 i = F_LEN(have_state);
3408 bcopy(have_state, dst, i * sizeof(u_int32_t));
3409 dst += i;
3410
3411 if (have_state->opcode == O_REDIRECT &&
3412 (!has_dstport || !has_recv))
3413 errx(EX_USAGE, "missing \'dst-port\' or \'recv\'");
3414 }
3415 /*
3416 * start action section
3417 */
3418 rule->act_ofs = dst - rule->cmd;
3419
3420 /*
3421 * put back O_LOG if necessary
3422 */
3423 src = (ipfw_insn *)cmdbuf;
3424 if ( src->opcode == O_LOG ) {
3425 i = F_LEN(src);
3426 bcopy(src, dst, i * sizeof(u_int32_t));
3427 dst += i;
3428 }
3429 /*
3430 * copy all other actions
3431 */
3432 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3433 i = F_LEN(src);
3434 bcopy(src, dst, i * sizeof(u_int32_t));
3435 dst += i;
3436 }
3437
3438 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3439 i = (uint8_t *)dst - (uint8_t *)rule;
3440 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3441 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3442 if (!do_quiet)
3443 show_ipfw(rule, 10, 10);
3444 }
3445
3446 static void
3447 zero(int ac, char *av[])
3448 {
3449 int rulenum;
3450 int failed = EX_OK;
3451
3452 av++; ac--;
3453
3454 if (!ac) {
3455 /* clear all entries */
3456 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3457 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3458 if (!do_quiet)
3459 printf("Accounting cleared.\n");
3460
3461 return;
3462 }
3463
3464 while (ac) {
3465 /* Rule number */
3466 if (isdigit(**av)) {
3467 rulenum = atoi(*av);
3468 av++;
3469 ac--;
3470 if (setsockopt(s, IPPROTO_IP,
3471 IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3472 warn("rule %u: setsockopt(IP_FW_ZERO)",
3473 rulenum);
3474 failed = EX_UNAVAILABLE;
3475 } else if (!do_quiet)
3476 printf("Entry %d cleared\n", rulenum);
3477 } else {
3478 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3479 }
3480 }
3481 if (failed != EX_OK)
3482 exit(failed);
3483 }
3484
3485 static void
3486 resetlog(int ac, char *av[])
3487 {
3488 int rulenum;
3489 int failed = EX_OK;
3490
3491 av++; ac--;
3492
3493 if (!ac) {
3494 /* clear all entries */
3495 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3496 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3497 if (!do_quiet)
3498 printf("Logging counts reset.\n");
3499
3500 return;
3501 }
3502
3503 while (ac) {
3504 /* Rule number */
3505 if (isdigit(**av)) {
3506 rulenum = atoi(*av);
3507 av++;
3508 ac--;
3509 if (setsockopt(s, IPPROTO_IP,
3510 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3511 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3512 rulenum);
3513 failed = EX_UNAVAILABLE;
3514 } else if (!do_quiet)
3515 printf("Entry %d logging count reset\n",
3516 rulenum);
3517 } else {
3518 errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3519 }
3520 }
3521 if (failed != EX_OK)
3522 exit(failed);
3523 }
3524
3525 static void
3526 flush(void)
3527 {
3528 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3529
3530 if (!do_force && !do_quiet) { /* need to ask user */
3531 int c;
3532
3533 printf("Are you sure? [yn] ");
3534 fflush(stdout);
3535 do {
3536 c = toupper(getc(stdin));
3537 while (c != '\n' && getc(stdin) != '\n')
3538 if (feof(stdin))
3539 return; /* and do not flush */
3540 } while (c != 'Y' && c != 'N');
3541 printf("\n");
3542 if (c == 'N') /* user said no */
3543 return;
3544 }
3545 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3546 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3547 do_pipe ? "DUMMYNET" : "FW");
3548 if (!do_quiet)
3549 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3550 }
3551
3552 static void
3553 table_create(int ac, char **av)
3554 {
3555 struct ipfw_ioc_table tbl;
3556 char *eptr;
3557
3558 ac--;
3559 av++;
3560
3561 if (ac == 0)
3562 errx(EX_DATAERR, "missing table id");
3563
3564 memset(&tbl, 0, sizeof(tbl));
3565 tbl.tableid = strtoul(*av, &eptr, 0);
3566 if (*eptr != '\0')
3567 errx(EX_DATAERR, "invalid table id %s", *av);
3568 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0)
3569 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)");
3570 if (!do_quiet)
3571 printf("Created table %d\n", tbl.tableid);
3572 }
3573
3574 static void
3575 table_flush(int ac, char **av, int opt)
3576 {
3577 struct ipfw_ioc_table tbl;
3578 char *eptr;
3579
3580 ac--;
3581 av++;
3582
3583 memset(&tbl, 0, sizeof(tbl));
3584
3585 if (ac == 0) {
3586 if (opt == IP_FW_TBL_FLUSH) {
3587 /* Flush all tables */
3588 tbl.tableid = -1;
3589 goto flush;
3590 }
3591 errx(EX_DATAERR, "missing table id");
3592 }
3593
3594 tbl.tableid = strtoul(*av, &eptr, 0);
3595 if (*eptr != '\0')
3596 errx(EX_DATAERR, "invalid table id %s", *av);
3597
3598 flush:
3599 if (!do_force && !do_quiet) { /* need to ask user */
3600 int c;
3601
3602 printf("Are you sure? [yn] ");
3603 fflush(stdout);
3604 do {
3605 c = toupper(getc(stdin));
3606 while (c != '\n' && getc(stdin) != '\n')
3607 if (feof(stdin))
3608 return; /* and do not flush */
3609 } while (c != 'Y' && c != 'N');
3610 printf("\n");
3611 if (c == 'N') /* user said no */
3612 return;
3613 }
3614
3615 if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) {
3616 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3617 opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY");
3618 }
3619 if (!do_quiet) {
3620 if (tbl.tableid >= 0) {
3621 printf("%sed table %d\n",
3622 opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy",
3623 tbl.tableid);
3624 } else {
3625 printf("Flushed all tables\n");
3626 }
3627 }
3628 }
3629
3630 static void
3631 table_list(void)
3632 {
3633 struct ipfw_ioc_tbllist *list;
3634 int table_max, i;
3635 size_t len;
3636 socklen_t len1;
3637
3638 len = sizeof(table_max);
3639 if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len,
3640 NULL, 0) < 0)
3641 err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed");
3642
3643 len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]);
3644 list = malloc(len1);
3645 list->tableid = -1;
3646
3647 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0)
3648 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3649
3650 for (i = 0; i < list->tablecnt; ++i)
3651 printf("%u\n", list->tables[i]);
3652 }
3653
3654 /* XXX copied from route(8) */
3655 static void
3656 inet_makenetandmask(in_addr_t net, struct sockaddr_in *in,
3657 struct sockaddr_in *in_mask, int bits)
3658 {
3659 in_addr_t addr, mask = 0;
3660 char *cp;
3661
3662 /*
3663 * XXX: This approach unable to handle 0.0.0.1/32 correctly
3664 * as inet_network() converts 0.0.0.1 and 1 equally.
3665 */
3666 if (net <= 0xff)
3667 addr = net << IN_CLASSA_NSHIFT;
3668 else if (net <= 0xffff)
3669 addr = net << IN_CLASSB_NSHIFT;
3670 else if (net <= 0xffffff)
3671 addr = net << IN_CLASSC_NSHIFT;
3672 else
3673 addr = net;
3674
3675 if (bits != 0)
3676 mask = 0xffffffff << (32 - bits);
3677 else if (net == 0)
3678 mask = 0;
3679 else if (IN_CLASSA(addr))
3680 mask = IN_CLASSA_NET;
3681 else if (IN_CLASSB(addr))
3682 mask = IN_CLASSB_NET;
3683 else if (IN_CLASSC(addr))
3684 mask = IN_CLASSC_NET;
3685 else if (IN_MULTICAST(addr))
3686 mask = IN_CLASSD_NET;
3687 else
3688 mask = 0xffffffff;
3689
3690 in->sin_family = AF_INET;
3691 in->sin_len = sizeof(struct sockaddr_in);
3692 in->sin_addr.s_addr = htonl(addr);
3693
3694 if (mask != 0xffffffff) {
3695 in_mask->sin_addr.s_addr = htonl(mask);
3696 cp = (char *)(&in_mask->sin_addr + 1);
3697 while (*--cp == 0 && cp > (char *)in_mask)
3698 ;
3699 in_mask->sin_len = 1 + cp - (char *)in_mask;
3700 }
3701 }
3702
3703 static void
3704 table_alt(int ac, char **av, int opt)
3705 {
3706 struct ipfw_ioc_tblcont ent;
3707 struct ipfw_ioc_tblent *te;
3708 char *eptr;
3709
3710 --ac;
3711 ++av;
3712 if (ac == 0)
3713 errx(EX_DATAERR, "missing table id");
3714
3715 memset(&ent, 0, sizeof(ent));
3716 ent.tableid = strtoul(*av, &eptr, 0);
3717 ent.entcnt = 1;
3718 te = &ent.ent[0];
3719 if (*eptr != '\0')
3720 errx(EX_DATAERR, "invalid table id %s", *av);
3721
3722 --ac;
3723 ++av;
3724 if (ac == 0)
3725 errx(EX_DATAERR, "missing addresses");
3726
3727 while (ac > 0) {
3728 char *q;
3729
3730 q = strchr(*av, '/');
3731 if (q != NULL) {
3732 in_addr_t val;
3733 int bits;
3734
3735 *q = '\0';
3736 val = inet_network(*av);
3737 *q = '/';
3738 if (val == INADDR_NONE) {
3739 fflush(stdout);
3740 errx(EX_DATAERR, "invalid address %s", *av);
3741 }
3742
3743 bits = strtoul(q + 1, &eptr, 0);
3744 if (*eptr != '\0') {
3745 fflush(stdout);
3746 errx(EX_DATAERR, "invalid address %s", *av);
3747 }
3748 inet_makenetandmask(val, &te->key, &te->netmask, bits);
3749 } else {
3750 int n;
3751
3752 n = inet_pton(AF_INET, *av, &te->key.sin_addr);
3753 if (n == 0) {
3754 fflush(stdout);
3755 errx(EX_DATAERR, "invalid address %s", *av);
3756 } else if (n < 0) {
3757 fflush(stdout);
3758 err(EX_UNAVAILABLE, "inet_pton failed");
3759 }
3760 te->key.sin_family = AF_INET;
3761 te->key.sin_len = sizeof(struct sockaddr_in);
3762 }
3763
3764 if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) {
3765 if (opt == IP_FW_TBL_ADD && errno == EEXIST) {
3766 printf("Failed to add %s to table %d\n",
3767 *av, ent.tableid);
3768 } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) {
3769 printf("Failed to delete %s from table %d\n",
3770 *av, ent.tableid);
3771 } else {
3772 fflush(stdout);
3773 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3774 opt == IP_FW_TBL_ADD ? "ADD" : "DEL");
3775 }
3776 } else if (!do_quiet) {
3777 printf("%sed %s %s table %d\n",
3778 opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av,
3779 opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid);
3780 }
3781
3782 --ac;
3783 ++av;
3784 }
3785 }
3786
3787 static void
3788 table_show(int ac, char **av)
3789 {
3790 struct ipfw_ioc_tblcont *cont = NULL;
3791 int tableid, count = 128, i, uwidth = 0, lwidth = 0;
3792 char *eptr;
3793
3794 --ac;
3795 ++av;
3796 if (ac == 0)
3797 errx(EX_DATAERR, "missing table id");
3798
3799 tableid = strtoul(*av, &eptr, 0);
3800 if (*eptr != '\0')
3801 errx(EX_DATAERR, "invalid table id %s", *av);
3802
3803 for (;;) {
3804 socklen_t len;
3805
3806 len = __offsetof(struct ipfw_ioc_tblcont, ent[count]);
3807 cont = reallocf(cont, len);
3808 cont->tableid = tableid;
3809
3810 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) {
3811 if (errno == E2BIG) {
3812 count *= 2;
3813 continue;
3814 }
3815 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3816 }
3817 break;
3818 }
3819 if (cont->entcnt == 0)
3820 return;
3821
3822 if (do_acct) {
3823 for (i = 0; i < cont->entcnt; ++i) {
3824 int width;
3825
3826 width = snprintf(NULL, 0, "%ju",
3827 (uintmax_t)cont->ent[i].use);
3828 if (width > uwidth)
3829 uwidth = width;
3830 }
3831 }
3832
3833 for (i = 0; i < cont->entcnt; ++i) {
3834 const struct ipfw_ioc_tblent *te = &cont->ent[i];
3835 char addr[INET_ADDRSTRLEN];
3836
3837 if (do_acct)
3838 printf("%*ju ", uwidth, (uintmax_t)te->use);
3839 if (do_time) {
3840 char timestr[30];
3841
3842 if (lwidth == 0) {
3843 time_t t0 = 0;
3844
3845 strcpy(timestr, ctime(&t0));
3846 *strchr(timestr, '\n') = '\0';
3847 lwidth = strlen(timestr);
3848 }
3849 if (te->last_used) {
3850 time_t t = _long_to_time(te->last_used);
3851
3852 strcpy(timestr, ctime(&t));
3853 *strchr(timestr, '\n') = '\0';
3854 printf("%s ", timestr);
3855 } else {
3856 printf("%*s ", lwidth, " ");
3857 }
3858 }
3859
3860 if (te->netmask.sin_len == 0) {
3861 printf("%s\n", inet_ntop(AF_INET,
3862 &te->key.sin_addr, addr, sizeof(addr)));
3863 } else {
3864 struct sockaddr_in mask;
3865 int b;
3866
3867 memset(&mask, 0, sizeof(mask));
3868 memcpy(&mask, &te->netmask,
3869 te->netmask.sin_len);
3870 b = ffs(ntohl(te->netmask.sin_addr.s_addr));
3871 b = 32 - (b - 1);
3872
3873 printf("%s/%d\n", inet_ntop(AF_INET,
3874 &te->key.sin_addr, addr, sizeof(addr)), b);
3875 }
3876 }
3877 }
3878
3879 static void
3880 table_zero(int ac, char **av)
3881 {
3882 struct ipfw_ioc_table tbl;
3883
3884 --ac;
3885 ++av;
3886
3887 memset(&tbl, 0, sizeof(tbl));
3888 if (ac == 0) {
3889 tbl.tableid = -1;
3890 } else {
3891 char *eptr;
3892
3893 tbl.tableid = strtoul(*av, &eptr, 0);
3894 if (*eptr != '\0')
3895 errx(EX_DATAERR, "invalid table id %s", *av);
3896 }
3897
3898 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0)
3899 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)");
3900 if (!do_quiet)
3901 printf("Accounting cleared\n");
3902 }
3903
3904 static void
3905 table_expire(int ac, char **av)
3906 {
3907 struct ipfw_ioc_tblexp tbl;
3908 char *eptr;
3909 socklen_t len;
3910
3911 --ac;
3912 ++av;
3913
3914 memset(&tbl, 0, sizeof(tbl));
3915 if (ac == 0) {
3916 errx(EX_DATAERR, "missing expire time");
3917 } else if (ac == 1) {
3918 tbl.tableid = -1;
3919 } else {
3920 tbl.tableid = strtoul(*av, &eptr, 0);
3921 if (*eptr != '\0')
3922 errx(EX_DATAERR, "invalid table id %s", *av);
3923 --ac;
3924 ++av;
3925 }
3926
3927 tbl.expire = strtoul(*av, &eptr, 0);
3928 if (*eptr != '\0')
3929 errx(EX_DATAERR, "invalid expire timeout %s", *av);
3930
3931 if (!do_force && !do_quiet) { /* need to ask user */
3932 int c;
3933
3934 printf("Are you sure? [yn] ");
3935 fflush(stdout);
3936 do {
3937 c = toupper(getc(stdin));
3938 while (c != '\n' && getc(stdin) != '\n')
3939 if (feof(stdin))
3940 return; /* and do not flush */
3941 } while (c != 'Y' && c != 'N');
3942 printf("\n");
3943 if (c == 'N') /* user said no */
3944 return;
3945 }
3946
3947 len = sizeof(tbl);
3948 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0)
3949 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)");
3950 if (!do_quiet) {
3951 printf("Expired %d address%s\n", tbl.expcnt,
3952 (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : "");
3953 }
3954 }
3955
3956 static int
3957 ipfw_main(int ac, char **av)
3958 {
3959 int ch;
3960
3961 if (ac == 1)
3962 show_usage();
3963
3964 /* Set the force flag for non-interactive processes */
3965 do_force = !isatty(STDIN_FILENO);
3966
3967 optind = optreset = 1;
3968 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3969 switch (ch) {
3970 case 'h': /* help */
3971 help();
3972 break; /* NOTREACHED */
3973
3974 case 's': /* sort */
3975 do_sort = atoi(optarg);
3976 break;
3977 case 'a':
3978 do_acct = 1;
3979 break;
3980 case 'c':
3981 do_compact = 1;
3982 break;
3983 case 'd':
3984 do_dynamic = 1;
3985 break;
3986 case 'e':
3987 do_expired = 1;
3988 break;
3989 case 'f':
3990 do_force = 1;
3991 break;
3992 case 'N':
3993 do_resolv = 1;
3994 break;
3995 case 'q':
3996 do_quiet = 1;
3997 break;
3998 case 'S':
3999 show_sets = 1;
4000 break;
4001 case 't':
4002 do_time = 1;
4003 break;
4004 case 'v': /* verbose */
4005 verbose++;
4006 break;
4007 default:
4008 show_usage();
4009 }
4010
4011 ac -= optind;
4012 av += optind;
4013 NEED1("bad arguments, for usage summary ``ipfw''");
4014
4015 /*
4016 * optional: pipe, queue or table
4017 */
4018 if (!strncmp(*av, "pipe", strlen(*av))) {
4019 do_pipe = 1;
4020 ac--;
4021 av++;
4022 } else if (!strncmp(*av, "queue", strlen(*av))) {
4023 do_pipe = 2;
4024 ac--;
4025 av++;
4026 } else if (!strncmp(*av, "table", strlen(*av))) {
4027 do_table = 1;
4028 ac--;
4029 av++;
4030 }
4031 NEED1("missing command");
4032
4033 /*
4034 * for pipes, queues and table we normally say 'pipe NN config'
4035 * but the code is easier to parse as 'pipe config NN' so we
4036 * swap the two arguments.
4037 */
4038 if ((do_pipe > 0 || do_table > 0) && ac > 1 &&
4039 *av[0] >= '0' && *av[0] <= '9') {
4040 char *p = av[0];
4041 av[0] = av[1];
4042 av[1] = p;
4043 }
4044 if (do_table) {
4045 if (!strncmp(*av, "create", strlen(*av)))
4046 table_create(ac, av);
4047 else if (!strncmp(*av, "destroy", strlen(*av)))
4048 table_flush(ac, av, IP_FW_TBL_DESTROY);
4049 else if (!strncmp(*av, "list", strlen(*av)))
4050 table_list();
4051 else if (!strncmp(*av, "add", strlen(*av)))
4052 table_alt(ac, av, IP_FW_TBL_ADD);
4053 else if (!strncmp(*av, "delete", strlen(*av)))
4054 table_alt(ac, av, IP_FW_TBL_DEL);
4055 else if (!strncmp(*av, "flush", strlen(*av)))
4056 table_flush(ac, av, IP_FW_TBL_FLUSH);
4057 else if (!strncmp(*av, "print", strlen(*av)))
4058 table_show(ac, av);
4059 else if (!strncmp(*av, "show", strlen(*av))) {
4060 do_acct++;
4061 table_show(ac, av);
4062 } else if (!strncmp(*av, "zero", strlen(*av)))
4063 table_zero(ac, av);
4064 else if (!strncmp(*av, "expire", strlen(*av)))
4065 table_expire(ac, av);
4066 else
4067 errx(EX_USAGE, "bad command `%s'", *av);
4068 return 0;
4069 }
4070 if (!strncmp(*av, "add", strlen(*av)))
4071 add(ac, av);
4072 else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
4073 config_pipe(ac, av);
4074 else if (!strncmp(*av, "delete", strlen(*av)))
4075 delete(ac, av);
4076 else if (!strncmp(*av, "flush", strlen(*av)))
4077 flush();
4078 else if (!strncmp(*av, "zero", strlen(*av)))
4079 zero(ac, av);
4080 else if (!strncmp(*av, "resetlog", strlen(*av)))
4081 resetlog(ac, av);
4082 else if (!strncmp(*av, "print", strlen(*av)) ||
4083 !strncmp(*av, "list", strlen(*av)))
4084 list(ac, av);
4085 else if (!strncmp(*av, "enable", strlen(*av)))
4086 sysctl_handler(ac, av, 1);
4087 else if (!strncmp(*av, "disable", strlen(*av)))
4088 sysctl_handler(ac, av, 0);
4089 else if (!strncmp(*av, "set", strlen(*av)))
4090 sets_handler(ac, av);
4091 else if (!strncmp(*av, "show", strlen(*av))) {
4092 do_acct++;
4093 list(ac, av);
4094 } else
4095 errx(EX_USAGE, "bad command `%s'", *av);
4096 return 0;
4097 }
4098
4099
4100 static void
4101 ipfw_readfile(int ac, char *av[])
4102 {
4103 #define MAX_ARGS 32
4104 #define WHITESP " \t\f\v\n\r"
4105 char buf[BUFSIZ];
4106 char *a, *p, *args[MAX_ARGS], *cmd = NULL;
4107 char linename[20];
4108 int i=0, lineno=0, qflag=0, pflag=0, status;
4109 FILE *f = NULL;
4110 pid_t preproc = 0;
4111 int c;
4112
4113 while ((c = getopt(ac, av, "D:U:p:q")) != -1)
4114 switch(c) {
4115 case 'D':
4116 if (!pflag)
4117 errx(EX_USAGE, "-D requires -p");
4118 if (i > MAX_ARGS - 2)
4119 errx(EX_USAGE,
4120 "too many -D or -U options");
4121 args[i++] = __DECONST(char *, "-D");
4122 args[i++] = optarg;
4123 break;
4124
4125 case 'U':
4126 if (!pflag)
4127 errx(EX_USAGE, "-U requires -p");
4128 if (i > MAX_ARGS - 2)
4129 errx(EX_USAGE,
4130 "too many -D or -U options");
4131 args[i++] = __DECONST(char *, "-U");
4132 args[i++] = optarg;
4133 break;
4134
4135 case 'p':
4136 pflag = 1;
4137 cmd = optarg;
4138 args[0] = cmd;
4139 i = 1;
4140 break;
4141
4142 case 'q':
4143 qflag = 1;
4144 break;
4145
4146 default:
4147 errx(EX_USAGE, "bad arguments, for usage"
4148 " summary ``ipfw''");
4149 }
4150
4151 av += optind;
4152 ac -= optind;
4153 if (ac != 1)
4154 errx(EX_USAGE, "extraneous filename arguments");
4155
4156 if ((f = fopen(av[0], "r")) == NULL)
4157 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
4158
4159 if (pflag) {
4160 /* pipe through preprocessor (cpp or m4) */
4161 int pipedes[2];
4162
4163 args[i] = NULL;
4164
4165 if (pipe(pipedes) == -1)
4166 err(EX_OSERR, "cannot create pipe");
4167
4168 switch((preproc = fork())) {
4169 case -1:
4170 err(EX_OSERR, "cannot fork");
4171
4172 case 0:
4173 /* child */
4174 if (dup2(fileno(f), 0) == -1
4175 || dup2(pipedes[1], 1) == -1)
4176 err(EX_OSERR, "dup2()");
4177 fclose(f);
4178 close(pipedes[1]);
4179 close(pipedes[0]);
4180 execvp(cmd, args);
4181 err(EX_OSERR, "execvp(%s) failed", cmd);
4182
4183 default:
4184 /* parent */
4185 fclose(f);
4186 close(pipedes[1]);
4187 if ((f = fdopen(pipedes[0], "r")) == NULL) {
4188 int savederrno = errno;
4189
4190 kill(preproc, SIGTERM);
4191 errno = savederrno;
4192 err(EX_OSERR, "fdopen()");
4193 }
4194 }
4195 }
4196
4197 while (fgets(buf, BUFSIZ, f)) {
4198 lineno++;
4199 snprintf(linename, sizeof(linename), "Line %d", lineno);
4200 args[0] = linename;
4201
4202 if (*buf == '#')
4203 continue;
4204 if ((p = strchr(buf, '#')) != NULL)
4205 *p = '\0';
4206 i = 1;
4207 if (qflag)
4208 args[i++] = __DECONST(char *, "-q");
4209 for (a = strtok(buf, WHITESP);
4210 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
4211 args[i] = a;
4212 if (i == (qflag? 2: 1))
4213 continue;
4214 if (i == MAX_ARGS)
4215 errx(EX_USAGE, "%s: too many arguments",
4216 linename);
4217 args[i] = NULL;
4218
4219 ipfw_main(i, args);
4220 }
4221 fclose(f);
4222 if (pflag) {
4223 if (waitpid(preproc, &status, 0) == -1)
4224 errx(EX_OSERR, "waitpid()");
4225 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
4226 errx(EX_UNAVAILABLE,
4227 "preprocessor exited with status %d",
4228 WEXITSTATUS(status));
4229 else if (WIFSIGNALED(status))
4230 errx(EX_UNAVAILABLE,
4231 "preprocessor exited with signal %d",
4232 WTERMSIG(status));
4233 }
4234 }
4235
4236 int
4237 main(int ac, char *av[])
4238 {
4239 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
4240 if (s < 0)
4241 err(EX_UNAVAILABLE, "socket");
4242
4243 /*
4244 * If the last argument is an absolute pathname, interpret it
4245 * as a file to be preprocessed.
4246 */
4247
4248 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
4249 ipfw_readfile(ac, av);
4250 else
4251 ipfw_main(ac, av);
4252 return EX_OK;
4253 }
DragonFly BSD