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Use GNU style like the rest of the file for my last commit.
[dragonfly/vkernel-mp.git] / sbin / ipfw / ipfw2.c
blob864bdb2a2c6a4226e686ade775fcafd77c51a6a8
1 /*
2 * Copyright (c) 2002 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
5 *
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
8 *
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
11 *
12 * Redistribution in binary form may occur without any restrictions.
13 * Obviously, it would be nice if you gave credit where credit is due
14 * but requiring it would be too onerous.
15 *
16 * This software is provided ``AS IS'' without any warranties of any kind.
17 *
18 * NEW command line interface for IP firewall facility
19 *
20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
21 * $DragonFly: src/sbin/ipfw/ipfw2.c,v 1.8 2006/06/25 13:02:37 corecode Exp $
22 */
23
24 #include <sys/param.h>
25 #include <sys/mbuf.h>
26 #include <sys/socket.h>
27 #include <sys/sockio.h>
28 #include <sys/sysctl.h>
29 #include <sys/time.h>
30 #include <sys/wait.h>
31
32 #include <ctype.h>
33 #include <err.h>
34 #include <errno.h>
35 #include <grp.h>
36 #include <limits.h>
37 #include <netdb.h>
38 #include <pwd.h>
39 #include <signal.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <stdarg.h>
43 #include <string.h>
44 #include <unistd.h>
45 #include <sysexits.h>
46
47 #include <net/if.h>
48 #include <netinet/in.h>
49 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip_icmp.h>
52 #include <net/ipfw/ip_fw.h>
53 #include <net/route.h> /* def. of struct route */
54 #include <net/dummynet/ip_dummynet.h>
55 #include <netinet/tcp.h>
56 #include <arpa/inet.h>
57
58 int s, /* main RAW socket */
59 do_resolv, /* Would try to resolve all */
60 do_acct, /* Show packet/byte count */
61 do_time, /* Show time stamps */
62 do_quiet, /* Be quiet in add and flush */
63 do_force, /* Don't ask for confirmation */
64 do_pipe, /* this cmd refers to a pipe */
65 do_sort, /* field to sort results (0 = no) */
66 do_dynamic, /* display dynamic rules */
67 do_expired, /* display expired dynamic rules */
68 do_compact, /* show rules in compact mode */
69 show_sets, /* display rule sets */
70 verbose;
71
72 #define IP_MASK_ALL 0xffffffff
73
74 /*
75 * structure to hold flag names and associated values to be
76 * set in the appropriate masks.
77 * A NULL string terminates the array.
78 * Often, an element with 0 value contains an error string.
79 *
80 */
81 struct _s_x {
82 char *s;
83 int x;
84 };
85
86 static struct _s_x f_tcpflags[] = {
87 { "syn", TH_SYN },
88 { "fin", TH_FIN },
89 { "ack", TH_ACK },
90 { "psh", TH_PUSH },
91 { "rst", TH_RST },
92 { "urg", TH_URG },
93 { "tcp flag", 0 },
94 { NULL, 0 }
95 };
96
97 static struct _s_x f_tcpopts[] = {
98 { "mss", IP_FW_TCPOPT_MSS },
99 { "maxseg", IP_FW_TCPOPT_MSS },
100 { "window", IP_FW_TCPOPT_WINDOW },
101 { "sack", IP_FW_TCPOPT_SACK },
102 { "ts", IP_FW_TCPOPT_TS },
103 { "timestamp", IP_FW_TCPOPT_TS },
104 { "cc", IP_FW_TCPOPT_CC },
105 { "tcp option", 0 },
106 { NULL, 0 }
107 };
108
109 /*
110 * IP options span the range 0 to 255 so we need to remap them
111 * (though in fact only the low 5 bits are significant).
112 */
113 static struct _s_x f_ipopts[] = {
114 { "ssrr", IP_FW_IPOPT_SSRR},
115 { "lsrr", IP_FW_IPOPT_LSRR},
116 { "rr", IP_FW_IPOPT_RR},
117 { "ts", IP_FW_IPOPT_TS},
118 { "ip option", 0 },
119 { NULL, 0 }
120 };
121
122 static struct _s_x f_iptos[] = {
123 { "lowdelay", IPTOS_LOWDELAY},
124 { "throughput", IPTOS_THROUGHPUT},
125 { "reliability", IPTOS_RELIABILITY},
126 { "mincost", IPTOS_MINCOST},
127 { "congestion", IPTOS_CE},
128 { "ecntransport", IPTOS_ECT},
129 { "ip tos option", 0},
130 { NULL, 0 }
131 };
132
133 static struct _s_x limit_masks[] = {
134 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
135 {"src-addr", DYN_SRC_ADDR},
136 {"src-port", DYN_SRC_PORT},
137 {"dst-addr", DYN_DST_ADDR},
138 {"dst-port", DYN_DST_PORT},
139 {NULL, 0}
140 };
141
142 /*
143 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
144 * This is only used in this code.
145 */
146 #define IPPROTO_ETHERTYPE 0x1000
147 static struct _s_x ether_types[] = {
148 /*
149 * Note, we cannot use "-:&/" in the names because they are field
150 * separators in the type specifications. Also, we use s = NULL as
151 * end-delimiter, because a type of 0 can be legal.
152 */
153 { "ip", 0x0800 },
154 { "ipv4", 0x0800 },
155 { "ipv6", 0x86dd },
156 { "arp", 0x0806 },
157 { "rarp", 0x8035 },
158 { "vlan", 0x8100 },
159 { "loop", 0x9000 },
160 { "trail", 0x1000 },
161 { "at", 0x809b },
162 { "atalk", 0x809b },
163 { "aarp", 0x80f3 },
164 { "pppoe_disc", 0x8863 },
165 { "pppoe_sess", 0x8864 },
166 { "ipx_8022", 0x00E0 },
167 { "ipx_8023", 0x0000 },
168 { "ipx_ii", 0x8137 },
169 { "ipx_snap", 0x8137 },
170 { "ipx", 0x8137 },
171 { "ns", 0x0600 },
172 { NULL, 0 }
173 };
174
175 static void show_usage(void);
176
177 enum tokens {
178 TOK_NULL=0,
179
180 TOK_OR,
181 TOK_NOT,
182 TOK_STARTBRACE,
183 TOK_ENDBRACE,
184
185 TOK_ACCEPT,
186 TOK_COUNT,
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_LAYER2,
205 TOK_OUT,
206 TOK_XMIT,
207 TOK_RECV,
208 TOK_VIA,
209 TOK_FRAG,
210 TOK_IPOPTS,
211 TOK_IPLEN,
212 TOK_IPID,
213 TOK_IPPRECEDENCE,
214 TOK_IPTOS,
215 TOK_IPTTL,
216 TOK_IPVER,
217 TOK_ESTAB,
218 TOK_SETUP,
219 TOK_TCPFLAGS,
220 TOK_TCPOPTS,
221 TOK_TCPSEQ,
222 TOK_TCPACK,
223 TOK_TCPWIN,
224 TOK_ICMPTYPES,
225 TOK_MAC,
226 TOK_MACTYPE,
227
228 TOK_PLR,
229 TOK_NOERROR,
230 TOK_BUCKETS,
231 TOK_DSTIP,
232 TOK_SRCIP,
233 TOK_DSTPORT,
234 TOK_SRCPORT,
235 TOK_ALL,
236 TOK_MASK,
237 TOK_BW,
238 TOK_DELAY,
239 TOK_RED,
240 TOK_GRED,
241 TOK_DROPTAIL,
242 TOK_PROTO,
243 TOK_WEIGHT,
244 };
245
246 struct _s_x dummynet_params[] = {
247 { "plr", TOK_PLR },
248 { "noerror", TOK_NOERROR },
249 { "buckets", TOK_BUCKETS },
250 { "dst-ip", TOK_DSTIP },
251 { "src-ip", TOK_SRCIP },
252 { "dst-port", TOK_DSTPORT },
253 { "src-port", TOK_SRCPORT },
254 { "proto", TOK_PROTO },
255 { "weight", TOK_WEIGHT },
256 { "all", TOK_ALL },
257 { "mask", TOK_MASK },
258 { "droptail", TOK_DROPTAIL },
259 { "red", TOK_RED },
260 { "gred", TOK_GRED },
261 { "bw", TOK_BW },
262 { "bandwidth", TOK_BW },
263 { "delay", TOK_DELAY },
264 { "pipe", TOK_PIPE },
265 { "queue", TOK_QUEUE },
266 { "dummynet-params", TOK_NULL },
267 { NULL, 0 }
268 };
269
270 struct _s_x rule_actions[] = {
271 { "accept", TOK_ACCEPT },
272 { "pass", TOK_ACCEPT },
273 { "allow", TOK_ACCEPT },
274 { "permit", TOK_ACCEPT },
275 { "count", TOK_COUNT },
276 { "pipe", TOK_PIPE },
277 { "queue", TOK_QUEUE },
278 { "divert", TOK_DIVERT },
279 { "tee", TOK_TEE },
280 { "fwd", TOK_FORWARD },
281 { "forward", TOK_FORWARD },
282 { "skipto", TOK_SKIPTO },
283 { "deny", TOK_DENY },
284 { "drop", TOK_DENY },
285 { "reject", TOK_REJECT },
286 { "reset", TOK_RESET },
287 { "unreach", TOK_UNREACH },
288 { "check-state", TOK_CHECKSTATE },
289 { NULL, TOK_NULL },
290 { NULL, 0 }
291 };
292
293 struct _s_x rule_options[] = {
294 { "uid", TOK_UID },
295 { "gid", TOK_GID },
296 { "in", TOK_IN },
297 { "limit", TOK_LIMIT },
298 { "keep-state", TOK_KEEPSTATE },
299 { "layer2", TOK_LAYER2 },
300 { "out", TOK_OUT },
301 { "xmit", TOK_XMIT },
302 { "recv", TOK_RECV },
303 { "via", TOK_VIA },
304 { "fragment", TOK_FRAG },
305 { "frag", TOK_FRAG },
306 { "ipoptions", TOK_IPOPTS },
307 { "ipopts", TOK_IPOPTS },
308 { "iplen", TOK_IPLEN },
309 { "ipid", TOK_IPID },
310 { "ipprecedence", TOK_IPPRECEDENCE },
311 { "iptos", TOK_IPTOS },
312 { "ipttl", TOK_IPTTL },
313 { "ipversion", TOK_IPVER },
314 { "ipver", TOK_IPVER },
315 { "estab", TOK_ESTAB },
316 { "established", TOK_ESTAB },
317 { "setup", TOK_SETUP },
318 { "tcpflags", TOK_TCPFLAGS },
319 { "tcpflgs", TOK_TCPFLAGS },
320 { "tcpoptions", TOK_TCPOPTS },
321 { "tcpopts", TOK_TCPOPTS },
322 { "tcpseq", TOK_TCPSEQ },
323 { "tcpack", TOK_TCPACK },
324 { "tcpwin", TOK_TCPWIN },
325 { "icmptype", TOK_ICMPTYPES },
326 { "icmptypes", TOK_ICMPTYPES },
327 { "dst-ip", TOK_DSTIP },
328 { "src-ip", TOK_SRCIP },
329 { "dst-port", TOK_DSTPORT },
330 { "src-port", TOK_SRCPORT },
331 { "proto", TOK_PROTO },
332 { "MAC", TOK_MAC },
333 { "mac", TOK_MAC },
334 { "mac-type", TOK_MACTYPE },
335
336 { "not", TOK_NOT }, /* pseudo option */
337 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
338 { "or", TOK_OR }, /* pseudo option */
339 { "|", /* escape */ TOK_OR }, /* pseudo option */
340 { "{", TOK_STARTBRACE }, /* pseudo option */
341 { "(", TOK_STARTBRACE }, /* pseudo option */
342 { "}", TOK_ENDBRACE }, /* pseudo option */
343 { ")", TOK_ENDBRACE }, /* pseudo option */
344 { NULL, TOK_NULL },
345 { NULL, 0 }
346 };
347
348 /**
349 * match_token takes a table and a string, returns the value associated
350 * with the string (0 meaning an error in most cases)
351 */
352 static int
353 match_token(struct _s_x *table, char *string)
354 {
355 struct _s_x *pt;
356 int i = strlen(string);
357
358 for (pt = table ; i && pt->s != NULL ; pt++)
359 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
360 return pt->x;
361 return -1;
362 };
363
364 static char *
365 match_value(struct _s_x *p, u_int32_t value)
366 {
367 for (; p->s != NULL; p++)
368 if (p->x == value)
369 return p->s;
370 return NULL;
371 }
372
373 /*
374 * prints one port, symbolic or numeric
375 */
376 static void
377 print_port(int proto, u_int16_t port)
378 {
379
380 if (proto == IPPROTO_ETHERTYPE) {
381 char *s;
382
383 if (do_resolv && (s = match_value(ether_types, port)) )
384 printf("%s", s);
385 else
386 printf("0x%04x", port);
387 } else {
388 struct servent *se = NULL;
389 if (do_resolv) {
390 struct protoent *pe = getprotobynumber(proto);
391
392 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
393 }
394 if (se)
395 printf("%s", se->s_name);
396 else
397 printf("%d", port);
398 }
399 }
400
401 /*
402 * print the values in a list of ports
403 * XXX todo: add support for mask.
404 */
405 static void
406 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
407 {
408 u_int16_t *p = cmd->ports;
409 int i;
410 char *sep= " ";
411
412 if (cmd->o.len & F_NOT)
413 printf(" not");
414 if (opcode != 0)
415 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
416 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
417 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
418 printf(sep);
419 print_port(proto, p[0]);
420 if (p[0] != p[1]) {
421 printf("-");
422 print_port(proto, p[1]);
423 }
424 sep = ",";
425 }
426 }
427
428 /*
429 * Like strtol, but also translates service names into port numbers
430 * for some protocols.
431 * In particular:
432 * proto == -1 disables the protocol check;
433 * proto == IPPROTO_ETHERTYPE looks up an internal table
434 * proto == <some value in /etc/protocols> matches the values there.
435 * Returns *end == s in case the parameter is not found.
436 */
437 static int
438 strtoport(char *s, char **end, int base, int proto)
439 {
440 char *p, *buf;
441 char *s1;
442 int i;
443
444 *end = s; /* default - not found */
445 if ( *s == '\0')
446 return 0; /* not found */
447
448 if (isdigit(*s))
449 return strtol(s, end, base);
450
451 /*
452 * find separator. '\\' escapes the next char.
453 */
454 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
455 if (*s1 == '\\' && s1[1] != '\0')
456 s1++;
457
458 buf = malloc(s1 - s + 1);
459 if (buf == NULL)
460 return 0;
461
462 /*
463 * copy into a buffer skipping backslashes
464 */
465 for (p = s, i = 0; p != s1 ; p++)
466 if ( *p != '\\')
467 buf[i++] = *p;
468 buf[i++] = '\0';
469
470 if (proto == IPPROTO_ETHERTYPE) {
471 i = match_token(ether_types, buf);
472 free(buf);
473 if (i != -1) { /* found */
474 *end = s1;
475 return i;
476 }
477 } else {
478 struct protoent *pe = NULL;
479 struct servent *se;
480
481 if (proto != 0)
482 pe = getprotobynumber(proto);
483 setservent(1);
484 se = getservbyname(buf, pe ? pe->p_name : NULL);
485 free(buf);
486 if (se != NULL) {
487 *end = s1;
488 return ntohs(se->s_port);
489 }
490 }
491 return 0; /* not found */
492 }
493
494 /*
495 * fill the body of the command with the list of port ranges.
496 * At the moment it only understands numeric ranges.
497 */
498 static int
499 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
500 {
501 u_int16_t *p = cmd->ports;
502 int i = 0;
503 char *s = av;
504
505 while (*s) {
506 u_int16_t a, b;
507
508 a = strtoport(av, &s, 0, proto);
509 if (s == av) /* no parameter */
510 break;
511 if (*s == '-') { /* a range */
512 av = s+1;
513 b = strtoport(av, &s, 0, proto);
514 if (s == av) /* no parameter */
515 break;
516 p[0] = a;
517 p[1] = b;
518 } else if (*s == ',' || *s == '\0' ) {
519 p[0] = p[1] = a;
520 } else { /* invalid separator */
521 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
522 *s, av);
523 }
524 i++;
525 p += 2;
526 av = s+1;
527 }
528 if (i > 0) {
529 if (i+1 > F_LEN_MASK)
530 errx(EX_DATAERR, "too many ports/ranges\n");
531 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
532 }
533 return i;
534 }
535
536 static struct _s_x icmpcodes[] = {
537 { "net", ICMP_UNREACH_NET },
538 { "host", ICMP_UNREACH_HOST },
539 { "protocol", ICMP_UNREACH_PROTOCOL },
540 { "port", ICMP_UNREACH_PORT },
541 { "needfrag", ICMP_UNREACH_NEEDFRAG },
542 { "srcfail", ICMP_UNREACH_SRCFAIL },
543 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
544 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
545 { "isolated", ICMP_UNREACH_ISOLATED },
546 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
547 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
548 { "tosnet", ICMP_UNREACH_TOSNET },
549 { "toshost", ICMP_UNREACH_TOSHOST },
550 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
551 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
552 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
553 { NULL, 0 }
554 };
555
556 static void
557 fill_reject_code(u_short *codep, char *str)
558 {
559 int val;
560 char *s;
561
562 val = strtoul(str, &s, 0);
563 if (s == str || *s != '\0' || val >= 0x100)
564 val = match_token(icmpcodes, str);
565 if (val < 0)
566 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
567 *codep = val;
568 return;
569 }
570
571 static void
572 print_reject_code(u_int16_t code)
573 {
574 char *s = match_value(icmpcodes, code);
575
576 if (s != NULL)
577 printf("unreach %s", s);
578 else
579 printf("unreach %u", code);
580 }
581
582 /*
583 * Returns the number of bits set (from left) in a contiguous bitmask,
584 * or -1 if the mask is not contiguous.
585 * XXX this needs a proper fix.
586 * This effectively works on masks in big-endian (network) format.
587 * when compiled on little endian architectures.
588 *
589 * First bit is bit 7 of the first byte -- note, for MAC addresses,
590 * the first bit on the wire is bit 0 of the first byte.
591 * len is the max length in bits.
592 */
593 static int
594 contigmask(u_char *p, int len)
595 {
596 int i, n;
597 for (i=0; i<len ; i++)
598 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
599 break;
600 for (n=i+1; n < len; n++)
601 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
602 return -1; /* mask not contiguous */
603 return i;
604 }
605
606 /*
607 * print flags set/clear in the two bitmasks passed as parameters.
608 * There is a specialized check for f_tcpflags.
609 */
610 static void
611 print_flags(char *name, ipfw_insn *cmd, struct _s_x *list)
612 {
613 char *comma="";
614 int i;
615 u_char set = cmd->arg1 & 0xff;
616 u_char clear = (cmd->arg1 >> 8) & 0xff;
617
618 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
619 printf(" setup");
620 return;
621 }
622
623 printf(" %s ", name);
624 for (i=0; list[i].x != 0; i++) {
625 if (set & list[i].x) {
626 set &= ~list[i].x;
627 printf("%s%s", comma, list[i].s);
628 comma = ",";
629 }
630 if (clear & list[i].x) {
631 clear &= ~list[i].x;
632 printf("%s!%s", comma, list[i].s);
633 comma = ",";
634 }
635 }
636 }
637
638 /*
639 * Print the ip address contained in a command.
640 */
641 static void
642 print_ip(ipfw_insn_ip *cmd, char *s)
643 {
644 struct hostent *he = NULL;
645 int mb;
646
647 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
648
649 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
650 printf("me");
651 return;
652 }
653 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
654 u_int32_t x, *d;
655 int i;
656 char comma = '{';
657
658 x = cmd->o.arg1 - 1;
659 x = htonl( ~x );
660 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
661 printf("%s/%d", inet_ntoa(cmd->addr),
662 contigmask((u_char *)&x, 32));
663 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
664 x &= 0xff; /* base */
665 d = (u_int32_t *)&(cmd->mask);
666 for (i=0; i < cmd->o.arg1; i++)
667 if (d[ i/32] & (1<<(i & 31))) {
668 printf("%c%d", comma, i+x);
669 comma = ',';
670 }
671 printf("}");
672 return;
673 }
674 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
675 mb = 32;
676 else
677 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
678 if (mb == 32 && do_resolv)
679 he = gethostbyaddr((char *)&(cmd->addr.s_addr),
680 sizeof(u_long), AF_INET);
681 if (he != NULL) /* resolved to name */
682 printf("%s", he->h_name);
683 else if (mb == 0) /* any */
684 printf("any");
685 else { /* numeric IP followed by some kind of mask */
686 printf("%s", inet_ntoa(cmd->addr));
687 if (mb < 0)
688 printf(":%s", inet_ntoa(cmd->mask));
689 else if (mb < 32)
690 printf("/%d", mb);
691 }
692 }
693
694 /*
695 * prints a MAC address/mask pair
696 */
697 static void
698 print_mac(u_char *addr, u_char *mask)
699 {
700 int l = contigmask(mask, 48);
701
702 if (l == 0)
703 printf(" any");
704 else {
705 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
706 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
707 if (l == -1)
708 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
709 mask[0], mask[1], mask[2],
710 mask[3], mask[4], mask[5]);
711 else if (l < 48)
712 printf("/%d", l);
713 }
714 }
715
716 static void
717 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
718 {
719 u_int8_t type;
720
721 cmd->d[0] = 0;
722 while (*av) {
723 if (*av == ',')
724 av++;
725
726 type = strtoul(av, &av, 0);
727
728 if (*av != ',' && *av != '\0')
729 errx(EX_DATAERR, "invalid ICMP type");
730
731 if (type > 31)
732 errx(EX_DATAERR, "ICMP type out of range");
733
734 cmd->d[0] |= 1 << type;
735 }
736 cmd->o.opcode = O_ICMPTYPE;
737 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
738 }
739
740 static void
741 print_icmptypes(ipfw_insn_u32 *cmd)
742 {
743 int i;
744 char sep= ' ';
745
746 printf(" icmptypes");
747 for (i = 0; i < 32; i++) {
748 if ( (cmd->d[0] & (1 << (i))) == 0)
749 continue;
750 printf("%c%d", sep, i);
751 sep = ',';
752 }
753 }
754
755 /*
756 * show_ipfw() prints the body of an ipfw rule.
757 * Because the standard rule has at least proto src_ip dst_ip, we use
758 * a helper function to produce these entries if not provided explicitly.
759 * The first argument is the list of fields we have, the second is
760 * the list of fields we want to be printed.
761 *
762 * Special cases if we have provided a MAC header:
763 * + if the rule does not contain IP addresses/ports, do not print them;
764 * + if the rule does not contain an IP proto, print "all" instead of "ip";
765 *
766 * Once we have 'have_options', IP header fields are printed as options.
767 */
768 #define HAVE_PROTO 0x0001
769 #define HAVE_SRCIP 0x0002
770 #define HAVE_DSTIP 0x0004
771 #define HAVE_MAC 0x0008
772 #define HAVE_MACTYPE 0x0010
773 #define HAVE_OPTIONS 0x8000
774
775 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
776 static void
777 show_prerequisites(int *flags, int want, int cmd)
778 {
779 if ( (*flags & HAVE_IP) == HAVE_IP)
780 *flags |= HAVE_OPTIONS;
781
782 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
783 cmd != O_MAC_TYPE) {
784 /*
785 * mac-type was optimized out by the compiler,
786 * restore it
787 */
788 printf(" any");
789 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
790 return;
791 }
792 if ( !(*flags & HAVE_OPTIONS)) {
793 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
794 printf(" ip");
795 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
796 printf(" from any");
797 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
798 printf(" to any");
799 }
800 *flags |= want;
801 }
802
803 static void
804 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
805 {
806 static int twidth = 0;
807 int l;
808 ipfw_insn *cmd;
809 int proto = 0; /* default */
810 int flags = 0; /* prerequisites */
811 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
812 int or_block = 0; /* we are in an or block */
813
814 u_int32_t set_disable = (u_int32_t)(rule->next_rule);
815
816 if (set_disable & (1 << rule->set)) { /* disabled */
817 if (!show_sets)
818 return;
819 else
820 printf("# DISABLED ");
821 }
822 printf("%05u ", rule->rulenum);
823
824 if (do_acct)
825 printf("%*llu %*llu ", pcwidth, rule->pcnt, bcwidth,
826 rule->bcnt);
827
828 if (do_time) {
829 char timestr[30];
830
831 if (twidth == 0) {
832 strcpy(timestr, ctime((time_t *)&twidth));
833 *strchr(timestr, '\n') = '\0';
834 twidth = strlen(timestr);
835 }
836 if (rule->timestamp) {
837 #if _FreeBSD_version < 500000 /* XXX check */
838 #define _long_to_time(x) (time_t)(x)
839 #endif
840 time_t t = _long_to_time(rule->timestamp);
841
842 strcpy(timestr, ctime(&t));
843 *strchr(timestr, '\n') = '\0';
844 printf("%s ", timestr);
845 } else {
846 printf("%*s ", twidth, " ");
847 }
848 }
849
850 if (show_sets)
851 printf("set %d ", rule->set);
852
853 /*
854 * print the optional "match probability"
855 */
856 if (rule->cmd_len > 0) {
857 cmd = rule->cmd ;
858 if (cmd->opcode == O_PROB) {
859 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
860 double d = 1.0 * p->d[0];
861
862 d = (d / 0x7fffffff);
863 printf("prob %f ", d);
864 }
865 }
866
867 /*
868 * first print actions
869 */
870 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
871 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
872 switch(cmd->opcode) {
873 case O_CHECK_STATE:
874 printf("check-state");
875 flags = HAVE_IP; /* avoid printing anything else */
876 break;
877
878 case O_ACCEPT:
879 printf("allow");
880 break;
881
882 case O_COUNT:
883 printf("count");
884 break;
885
886 case O_DENY:
887 printf("deny");
888 break;
889
890 case O_REJECT:
891 if (cmd->arg1 == ICMP_REJECT_RST)
892 printf("reset");
893 else if (cmd->arg1 == ICMP_UNREACH_HOST)
894 printf("reject");
895 else
896 print_reject_code(cmd->arg1);
897 break;
898
899 case O_SKIPTO:
900 printf("skipto %u", cmd->arg1);
901 break;
902
903 case O_PIPE:
904 printf("pipe %u", cmd->arg1);
905 break;
906
907 case O_QUEUE:
908 printf("queue %u", cmd->arg1);
909 break;
910
911 case O_DIVERT:
912 printf("divert %u", cmd->arg1);
913 break;
914
915 case O_TEE:
916 printf("tee %u", cmd->arg1);
917 break;
918
919 case O_FORWARD_IP:
920 {
921 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
922
923 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
924 if (s->sa.sin_port)
925 printf(",%d", s->sa.sin_port);
926 }
927 break;
928
929 case O_LOG: /* O_LOG is printed last */
930 logptr = (ipfw_insn_log *)cmd;
931 break;
932
933 default:
934 printf("** unrecognized action %d len %d",
935 cmd->opcode, cmd->len);
936 }
937 }
938 if (logptr) {
939 if (logptr->max_log > 0)
940 printf(" log logamount %d", logptr->max_log);
941 else
942 printf(" log");
943 }
944
945 /*
946 * then print the body.
947 */
948 if (rule->_pad & 1) { /* empty rules before options */
949 if (!do_compact)
950 printf(" ip from any to any");
951 flags |= HAVE_IP | HAVE_OPTIONS;
952 }
953
954 for (l = rule->act_ofs, cmd = rule->cmd ;
955 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
956 /* useful alias */
957 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
958
959 show_prerequisites(&flags, 0, cmd->opcode);
960
961 switch(cmd->opcode) {
962 case O_PROB:
963 break; /* done already */
964
965 case O_PROBE_STATE:
966 break; /* no need to print anything here */
967
968 case O_MACADDR2: {
969 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
970
971 if ((cmd->len & F_OR) && !or_block)
972 printf(" {");
973 if (cmd->len & F_NOT)
974 printf(" not");
975 printf(" MAC");
976 flags |= HAVE_MAC;
977 print_mac( m->addr, m->mask);
978 print_mac( m->addr + 6, m->mask + 6);
979 }
980 break;
981
982 case O_MAC_TYPE:
983 if ((cmd->len & F_OR) && !or_block)
984 printf(" {");
985 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
986 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
987 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
988 break;
989
990 case O_IP_SRC:
991 case O_IP_SRC_MASK:
992 case O_IP_SRC_ME:
993 case O_IP_SRC_SET:
994 show_prerequisites(&flags, HAVE_PROTO, 0);
995 if (!(flags & HAVE_SRCIP))
996 printf(" from");
997 if ((cmd->len & F_OR) && !or_block)
998 printf(" {");
999 print_ip((ipfw_insn_ip *)cmd,
1000 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1001 flags |= HAVE_SRCIP;
1002 break;
1003
1004 case O_IP_DST:
1005 case O_IP_DST_MASK:
1006 case O_IP_DST_ME:
1007 case O_IP_DST_SET:
1008 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1009 if (!(flags & HAVE_DSTIP))
1010 printf(" to");
1011 if ((cmd->len & F_OR) && !or_block)
1012 printf(" {");
1013 print_ip((ipfw_insn_ip *)cmd,
1014 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1015 flags |= HAVE_DSTIP;
1016 break;
1017
1018 case O_IP_DSTPORT:
1019 show_prerequisites(&flags, HAVE_IP, 0);
1020 case O_IP_SRCPORT:
1021 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1022 if ((cmd->len & F_OR) && !or_block)
1023 printf(" {");
1024 print_newports((ipfw_insn_u16 *)cmd, proto,
1025 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1026 break;
1027
1028 case O_PROTO: {
1029 struct protoent *pe;
1030
1031 if ((cmd->len & F_OR) && !or_block)
1032 printf(" {");
1033 if (cmd->len & F_NOT)
1034 printf(" not");
1035 proto = cmd->arg1;
1036 pe = getprotobynumber(cmd->arg1);
1037 if (flags & HAVE_OPTIONS)
1038 printf(" proto");
1039 if (pe)
1040 printf(" %s", pe->p_name);
1041 else
1042 printf(" %u", cmd->arg1);
1043 }
1044 flags |= HAVE_PROTO;
1045 break;
1046
1047 default: /*options ... */
1048 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1049 if ((cmd->len & F_OR) && !or_block)
1050 printf(" {");
1051 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1052 printf(" not");
1053 switch(cmd->opcode) {
1054 case O_FRAG:
1055 printf(" frag");
1056 break;
1057
1058 case O_IN:
1059 printf(cmd->len & F_NOT ? " out" : " in");
1060 break;
1061
1062 case O_LAYER2:
1063 printf(" layer2");
1064 break;
1065 case O_XMIT:
1066 case O_RECV:
1067 case O_VIA: {
1068 char *s;
1069 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1070
1071 if (cmd->opcode == O_XMIT)
1072 s = "xmit";
1073 else if (cmd->opcode == O_RECV)
1074 s = "recv";
1075 else if (cmd->opcode == O_VIA)
1076 s = "via";
1077 else
1078 s = "?huh?";
1079 if (cmdif->name[0] == '\0')
1080 printf(" %s %s", s,
1081 inet_ntoa(cmdif->p.ip));
1082 printf(" %s %s", s, cmdif->name);
1083 }
1084 break;
1085
1086 case O_IPID:
1087 printf(" ipid %u", cmd->arg1 );
1088 break;
1089
1090 case O_IPTTL:
1091 printf(" ipttl %u", cmd->arg1 );
1092 break;
1093
1094 case O_IPVER:
1095 printf(" ipver %u", cmd->arg1 );
1096 break;
1097
1098 case O_IPPRECEDENCE:
1099 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1100 break;
1101
1102 case O_IPLEN:
1103 printf(" iplen %u", cmd->arg1 );
1104 break;
1105
1106 case O_IPOPT:
1107 print_flags("ipoptions", cmd, f_ipopts);
1108 break;
1109
1110 case O_IPTOS:
1111 print_flags("iptos", cmd, f_iptos);
1112 break;
1113
1114 case O_ICMPTYPE:
1115 print_icmptypes((ipfw_insn_u32 *)cmd);
1116 break;
1117
1118 case O_ESTAB:
1119 printf(" established");
1120 break;
1121
1122 case O_TCPFLAGS:
1123 print_flags("tcpflags", cmd, f_tcpflags);
1124 break;
1125
1126 case O_TCPOPTS:
1127 print_flags("tcpoptions", cmd, f_tcpopts);
1128 break;
1129
1130 case O_TCPWIN:
1131 printf(" tcpwin %d", ntohs(cmd->arg1));
1132 break;
1133
1134 case O_TCPACK:
1135 printf(" tcpack %ld", ntohl(cmd32->d[0]));
1136 break;
1137
1138 case O_TCPSEQ:
1139 printf(" tcpseq %ld", ntohl(cmd32->d[0]));
1140 break;
1141
1142 case O_UID:
1143 {
1144 struct passwd *pwd = getpwuid(cmd32->d[0]);
1145
1146 if (pwd)
1147 printf(" uid %s", pwd->pw_name);
1148 else
1149 printf(" uid %u", cmd32->d[0]);
1150 }
1151 break;
1152
1153 case O_GID:
1154 {
1155 struct group *grp = getgrgid(cmd32->d[0]);
1156
1157 if (grp)
1158 printf(" gid %s", grp->gr_name);
1159 else
1160 printf(" gid %u", cmd32->d[0]);
1161 }
1162 break;
1163
1164 case O_KEEP_STATE:
1165 printf(" keep-state");
1166 break;
1167
1168 case O_LIMIT:
1169 {
1170 struct _s_x *p = limit_masks;
1171 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1172 u_int8_t x = c->limit_mask;
1173 char *comma = " ";
1174
1175 printf(" limit");
1176 for ( ; p->x != 0 ; p++)
1177 if ((x & p->x) == p->x) {
1178 x &= ~p->x;
1179 printf("%s%s", comma, p->s);
1180 comma = ",";
1181 }
1182 printf(" %d", c->conn_limit);
1183 }
1184 break;
1185
1186 default:
1187 printf(" [opcode %d len %d]",
1188 cmd->opcode, cmd->len);
1189 }
1190 }
1191 if (cmd->len & F_OR) {
1192 printf(" or");
1193 or_block = 1;
1194 } else if (or_block) {
1195 printf(" }");
1196 or_block = 0;
1197 }
1198 }
1199 show_prerequisites(&flags, HAVE_IP, 0);
1200
1201 printf("\n");
1202 }
1203
1204 static void
1205 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1206 {
1207 struct protoent *pe;
1208 struct in_addr a;
1209
1210 if (!do_expired) {
1211 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1212 return;
1213 }
1214
1215 printf("%05d %*llu %*llu (%ds)", (int)(d->rule), pcwidth, d->pcnt,
1216 bcwidth, d->bcnt, d->expire);
1217 switch (d->dyn_type) {
1218 case O_LIMIT_PARENT:
1219 printf(" PARENT %d", d->count);
1220 break;
1221 case O_LIMIT:
1222 printf(" LIMIT");
1223 break;
1224 case O_KEEP_STATE: /* bidir, no mask */
1225 printf(" STATE");
1226 break;
1227 }
1228
1229 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1230 printf(" %s", pe->p_name);
1231 else
1232 printf(" proto %u", d->id.proto);
1233
1234 a.s_addr = htonl(d->id.src_ip);
1235 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1236
1237 a.s_addr = htonl(d->id.dst_ip);
1238 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1239 printf("\n");
1240 }
1241
1242 int
1243 sort_q(const void *pa, const void *pb)
1244 {
1245 int rev = (do_sort < 0);
1246 int field = rev ? -do_sort : do_sort;
1247 long long res = 0;
1248 const struct dn_flow_queue *a = pa;
1249 const struct dn_flow_queue *b = pb;
1250
1251 switch (field) {
1252 case 1: /* pkts */
1253 res = a->len - b->len;
1254 break;
1255 case 2: /* bytes */
1256 res = a->len_bytes - b->len_bytes;
1257 break;
1258
1259 case 3: /* tot pkts */
1260 res = a->tot_pkts - b->tot_pkts;
1261 break;
1262
1263 case 4: /* tot bytes */
1264 res = a->tot_bytes - b->tot_bytes;
1265 break;
1266 }
1267 if (res < 0)
1268 res = -1;
1269 if (res > 0)
1270 res = 1;
1271 return (int)(rev ? res : -res);
1272 }
1273
1274 static void
1275 list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
1276 {
1277 int l;
1278
1279 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1280 fs->flow_mask.proto,
1281 fs->flow_mask.src_ip, fs->flow_mask.src_port,
1282 fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
1283 if (fs->rq_elements == 0)
1284 return;
1285
1286 printf("BKT Prot ___Source IP/port____ "
1287 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1288 if (do_sort != 0)
1289 heapsort(q, fs->rq_elements, sizeof *q, sort_q);
1290 for (l = 0; l < fs->rq_elements; l++) {
1291 struct in_addr ina;
1292 struct protoent *pe;
1293
1294 ina.s_addr = htonl(q[l].id.src_ip);
1295 printf("%3d ", q[l].hash_slot);
1296 pe = getprotobynumber(q[l].id.proto);
1297 if (pe)
1298 printf("%-4s ", pe->p_name);
1299 else
1300 printf("%4u ", q[l].id.proto);
1301 printf("%15s/%-5d ",
1302 inet_ntoa(ina), q[l].id.src_port);
1303 ina.s_addr = htonl(q[l].id.dst_ip);
1304 printf("%15s/%-5d ",
1305 inet_ntoa(ina), q[l].id.dst_port);
1306 printf("%4qu %8qu %2u %4u %3u\n",
1307 q[l].tot_pkts, q[l].tot_bytes,
1308 q[l].len, q[l].len_bytes, q[l].drops);
1309 if (verbose)
1310 printf(" S %20qd F %20qd\n",
1311 q[l].S, q[l].F);
1312 }
1313 }
1314
1315 static void
1316 print_flowset_parms(struct dn_flow_set *fs, char *prefix)
1317 {
1318 int l;
1319 char qs[30];
1320 char plr[30];
1321 char red[90]; /* Display RED parameters */
1322
1323 l = fs->qsize;
1324 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1325 if (l >= 8192)
1326 sprintf(qs, "%d KB", l / 1024);
1327 else
1328 sprintf(qs, "%d B", l);
1329 } else
1330 sprintf(qs, "%3d sl.", l);
1331 if (fs->plr)
1332 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1333 else
1334 plr[0] = '\0';
1335 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
1336 sprintf(red,
1337 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
1338 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1339 1.0 * fs->w_q / (double)(1 << SCALE_RED),
1340 SCALE_VAL(fs->min_th),
1341 SCALE_VAL(fs->max_th),
1342 1.0 * fs->max_p / (double)(1 << SCALE_RED));
1343 else
1344 sprintf(red, "droptail");
1345
1346 printf("%s %s%s %d queues (%d buckets) %s\n",
1347 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1348 }
1349
1350 static void
1351 list_pipes(void *data, int nbytes, int ac, char *av[])
1352 {
1353 u_long rulenum;
1354 void *next = data;
1355 struct dn_pipe *p = (struct dn_pipe *) data;
1356 struct dn_flow_set *fs;
1357 struct dn_flow_queue *q;
1358 int l;
1359
1360 if (ac > 0)
1361 rulenum = strtoul(*av++, NULL, 10);
1362 else
1363 rulenum = 0;
1364 for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
1365 double b = p->bandwidth;
1366 char buf[30];
1367 char prefix[80];
1368
1369 if (p->next != (struct dn_pipe *)DN_IS_PIPE)
1370 break; /* done with pipes, now queues */
1371
1372 /*
1373 * compute length, as pipe have variable size
1374 */
1375 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1376 next = (void *)p + l;
1377 nbytes -= l;
1378
1379 if (rulenum != 0 && rulenum != p->pipe_nr)
1380 continue;
1381
1382 /*
1383 * Print rate (or clocking interface)
1384 */
1385 if (p->if_name[0] != '\0')
1386 sprintf(buf, "%s", p->if_name);
1387 else if (b == 0)
1388 sprintf(buf, "unlimited");
1389 else if (b >= 1000000)
1390 sprintf(buf, "%7.3f Mbit/s", b/1000000);
1391 else if (b >= 1000)
1392 sprintf(buf, "%7.3f Kbit/s", b/1000);
1393 else
1394 sprintf(buf, "%7.3f bit/s ", b);
1395
1396 sprintf(prefix, "%05d: %s %4d ms ",
1397 p->pipe_nr, buf, p->delay);
1398 print_flowset_parms(&(p->fs), prefix);
1399 if (verbose)
1400 printf(" V %20qd\n", p->V >> MY_M);
1401
1402 q = (struct dn_flow_queue *)(p+1);
1403 list_queues(&(p->fs), q);
1404 }
1405 for (fs = next; nbytes >= sizeof *fs; fs = next) {
1406 char prefix[80];
1407
1408 if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE)
1409 break;
1410 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1411 next = (void *)fs + l;
1412 nbytes -= l;
1413 q = (struct dn_flow_queue *)(fs+1);
1414 sprintf(prefix, "q%05d: weight %d pipe %d ",
1415 fs->fs_nr, fs->weight, fs->parent_nr);
1416 print_flowset_parms(fs, prefix);
1417 list_queues(fs, q);
1418 }
1419 }
1420
1421 /*
1422 * This one handles all set-related commands
1423 * ipfw set { show | enable | disable }
1424 * ipfw set swap X Y
1425 * ipfw set move X to Y
1426 * ipfw set move rule X to Y
1427 */
1428 static void
1429 sets_handler(int ac, char *av[])
1430 {
1431 u_int32_t set_disable, masks[2];
1432 int i, nbytes;
1433 u_int16_t rulenum;
1434 u_int8_t cmd, new_set;
1435
1436 ac--;
1437 av++;
1438
1439 if (!ac)
1440 errx(EX_USAGE, "set needs command");
1441 if (!strncmp(*av, "show", strlen(*av)) ) {
1442 void *data;
1443 char *msg;
1444
1445 nbytes = sizeof(struct ip_fw);
1446 if ((data = malloc(nbytes)) == NULL)
1447 err(EX_OSERR, "malloc");
1448 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1449 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1450 set_disable = (u_int32_t)(((struct ip_fw *)data)->next_rule);
1451
1452 for (i = 0, msg = "disable" ; i < 31; i++)
1453 if ( (set_disable & (1<<i))) {
1454 printf("%s %d", msg, i);
1455 msg = "";
1456 }
1457 msg = (set_disable) ? " enable" : "enable";
1458 for (i = 0; i < 31; i++)
1459 if ( !(set_disable & (1<<i))) {
1460 printf("%s %d", msg, i);
1461 msg = "";
1462 }
1463 printf("\n");
1464 } else if (!strncmp(*av, "swap", strlen(*av))) {
1465 ac--; av++;
1466 if (ac != 2)
1467 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1468 rulenum = atoi(av[0]);
1469 new_set = atoi(av[1]);
1470 if (!isdigit(*(av[0])) || rulenum > 30)
1471 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1472 if (!isdigit(*(av[1])) || new_set > 30)
1473 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1474 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1475 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1476 masks, sizeof(u_int32_t));
1477 } else if (!strncmp(*av, "move", strlen(*av))) {
1478 ac--; av++;
1479 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1480 cmd = 2;
1481 ac--; av++;
1482 } else
1483 cmd = 3;
1484 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1485 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1486 rulenum = atoi(av[0]);
1487 new_set = atoi(av[2]);
1488 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1489 (cmd == 2 && rulenum == 65535) )
1490 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1491 if (!isdigit(*(av[2])) || new_set > 30)
1492 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1493 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1494 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1495 masks, sizeof(u_int32_t));
1496 } else if (!strncmp(*av, "disable", strlen(*av)) ||
1497 !strncmp(*av, "enable", strlen(*av)) ) {
1498 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0;
1499
1500 ac--; av++;
1501 masks[0] = masks[1] = 0;
1502
1503 while (ac) {
1504 if (isdigit(**av)) {
1505 i = atoi(*av);
1506 if (i < 0 || i > 30)
1507 errx(EX_DATAERR,
1508 "invalid set number %d\n", i);
1509 masks[which] |= (1<<i);
1510 } else if (!strncmp(*av, "disable", strlen(*av)))
1511 which = 0;
1512 else if (!strncmp(*av, "enable", strlen(*av)))
1513 which = 1;
1514 else
1515 errx(EX_DATAERR,
1516 "invalid set command %s\n", *av);
1517 av++; ac--;
1518 }
1519 if ( (masks[0] & masks[1]) != 0 )
1520 errx(EX_DATAERR,
1521 "cannot enable and disable the same set\n");
1522
1523 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1524 if (i)
1525 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1526 } else
1527 errx(EX_USAGE, "invalid set command %s\n", *av);
1528 }
1529
1530 static void
1531 sysctl_handler(int ac, char *av[], int which)
1532 {
1533 ac--;
1534 av++;
1535
1536 if (*av == NULL) {
1537 warnx("missing keyword to enable/disable\n");
1538 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1539 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1540 &which, sizeof(which));
1541 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1542 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1543 &which, sizeof(which));
1544 } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1545 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1546 &which, sizeof(which));
1547 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1548 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1549 &which, sizeof(which));
1550 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1551 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1552 &which, sizeof(which));
1553 } else {
1554 warnx("unrecognize enable/disable keyword: %s\n", *av);
1555 }
1556 }
1557
1558 static void
1559 list(int ac, char *av[])
1560 {
1561 struct ip_fw *r;
1562 ipfw_dyn_rule *dynrules, *d;
1563
1564 void *lim, *data = NULL;
1565 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1566 int exitval = EX_OK;
1567 int lac;
1568 char **lav;
1569 u_long rnum;
1570 char *endptr;
1571 int seen = 0;
1572
1573 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1574 int nalloc = 1024; /* start somewhere... */
1575
1576 ac--;
1577 av++;
1578
1579 /* get rules or pipes from kernel, resizing array as necessary */
1580 nbytes = nalloc;
1581
1582 while (nbytes >= nalloc) {
1583 nalloc = nalloc * 2 + 200;
1584 nbytes = nalloc;
1585 if ((data = realloc(data, nbytes)) == NULL)
1586 err(EX_OSERR, "realloc");
1587 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1588 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1589 do_pipe ? "DUMMYNET" : "FW");
1590 }
1591
1592 if (do_pipe) {
1593 list_pipes(data, nbytes, ac, av);
1594 goto done;
1595 }
1596
1597 /*
1598 * Count static rules. They have variable size so we
1599 * need to scan the list to count them.
1600 */
1601 for (nstat = 1, r = data, lim = data + nbytes;
1602 r->rulenum < 65535 && (void *)r < lim;
1603 ++nstat, r = (void *)r + RULESIZE(r) )
1604 ; /* nothing */
1605
1606 /*
1607 * Count dynamic rules. This is easier as they have
1608 * fixed size.
1609 */
1610 r = (void *)r + RULESIZE(r);
1611 dynrules = (ipfw_dyn_rule *)r ;
1612 n = (void *)r - data;
1613 ndyn = (nbytes - n) / sizeof *dynrules;
1614
1615 /* if showing stats, figure out column widths ahead of time */
1616 bcwidth = pcwidth = 0;
1617 if (do_acct) {
1618 for (n = 0, r = data; n < nstat;
1619 n++, r = (void *)r + RULESIZE(r)) {
1620 /* packet counter */
1621 width = snprintf(NULL, 0, "%llu", r->pcnt);
1622 if (width > pcwidth)
1623 pcwidth = width;
1624
1625 /* byte counter */
1626 width = snprintf(NULL, 0, "%llu", r->bcnt);
1627 if (width > bcwidth)
1628 bcwidth = width;
1629 }
1630 }
1631 if (do_dynamic && ndyn) {
1632 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1633 width = snprintf(NULL, 0, "%llu", d->pcnt);
1634 if (width > pcwidth)
1635 pcwidth = width;
1636
1637 width = snprintf(NULL, 0, "%llu", d->bcnt);
1638 if (width > bcwidth)
1639 bcwidth = width;
1640 }
1641 }
1642 /* if no rule numbers were specified, list all rules */
1643 if (ac == 0) {
1644 for (n = 0, r = data; n < nstat;
1645 n++, r = (void *)r + RULESIZE(r) )
1646 show_ipfw(r, pcwidth, bcwidth);
1647
1648 if (do_dynamic && ndyn) {
1649 printf("## Dynamic rules (%d):\n", ndyn);
1650 for (n = 0, d = dynrules; n < ndyn; n++, d++)
1651 show_dyn_ipfw(d, pcwidth, bcwidth);
1652 }
1653 goto done;
1654 }
1655
1656 /* display specific rules requested on command line */
1657
1658 for (lac = ac, lav = av; lac != 0; lac--) {
1659 /* convert command line rule # */
1660 rnum = strtoul(*lav++, &endptr, 10);
1661 if (*endptr) {
1662 exitval = EX_USAGE;
1663 warnx("invalid rule number: %s", *(lav - 1));
1664 continue;
1665 }
1666 for (n = seen = 0, r = data; n < nstat;
1667 n++, r = (void *)r + RULESIZE(r) ) {
1668 if (r->rulenum > rnum)
1669 break;
1670 if (r->rulenum == rnum) {
1671 show_ipfw(r, pcwidth, bcwidth);
1672 seen = 1;
1673 }
1674 }
1675 if (!seen) {
1676 /* give precedence to other error(s) */
1677 if (exitval == EX_OK)
1678 exitval = EX_UNAVAILABLE;
1679 warnx("rule %lu does not exist", rnum);
1680 }
1681 }
1682
1683 if (do_dynamic && ndyn) {
1684 printf("## Dynamic rules:\n");
1685 for (lac = ac, lav = av; lac != 0; lac--) {
1686 rnum = strtoul(*lav++, &endptr, 10);
1687 if (*endptr)
1688 /* already warned */
1689 continue;
1690 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1691 if ((int)(d->rule) > rnum)
1692 break;
1693 if ((int)(d->rule) == rnum)
1694 show_dyn_ipfw(d, pcwidth, bcwidth);
1695 }
1696 }
1697 }
1698
1699 ac = 0;
1700
1701 done:
1702 free(data);
1703
1704 if (exitval != EX_OK)
1705 exit(exitval);
1706 }
1707
1708 static void
1709 show_usage(void)
1710 {
1711 fprintf(stderr, "usage: ipfw [options]\n"
1712 " add [number] rule\n"
1713 " pipe number config [pipeconfig]\n"
1714 " queue number config [queueconfig]\n"
1715 " [pipe] flush\n"
1716 " [pipe] delete number ...\n"
1717 " [pipe] {list|show} [number ...]\n"
1718 " {zero|resetlog} [number ...]\n"
1719 "do \"ipfw -h\" or see ipfw manpage for details\n"
1720 );
1721
1722 exit(EX_USAGE);
1723 }
1724
1725 static void
1726 help(void)
1727 {
1728
1729 fprintf(stderr, "ipfw syntax summary:\n"
1730 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1731 "ipfw {pipe|queue} N config BODY\n"
1732 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1733 "\n"
1734 "RULE: [1..] [PROB] BODY\n"
1735 "RULENUM: INTEGER(1..65534)\n"
1736 "PROB: prob REAL(0..1)\n"
1737 "BODY: check-state [LOG] (no body) |\n"
1738 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1739 "ACTION: check-state | allow | count | deny | reject | skipto N |\n"
1740 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1741 "ADDR: [ MAC dst src ether_type ] \n"
1742 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1743 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n"
1744 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1745 "OPTION_LIST: OPTION [,OPTION_LIST]\n"
1746 );
1747 exit(0);
1748 }
1749
1750
1751 static int
1752 lookup_host (char *host, struct in_addr *ipaddr)
1753 {
1754 struct hostent *he;
1755
1756 if (!inet_aton(host, ipaddr)) {
1757 if ((he = gethostbyname(host)) == NULL)
1758 return(-1);
1759 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1760 }
1761 return(0);
1762 }
1763
1764 /*
1765 * fills the addr and mask fields in the instruction as appropriate from av.
1766 * Update length as appropriate.
1767 * The following formats are allowed:
1768 * any matches any IP. Actually returns an empty instruction.
1769 * me returns O_IP_*_ME
1770 * 1.2.3.4 single IP address
1771 * 1.2.3.4:5.6.7.8 address:mask
1772 * 1.2.3.4/24 address/mask
1773 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1774 */
1775 static void
1776 fill_ip(ipfw_insn_ip *cmd, char *av)
1777 {
1778 char *p = 0, md = 0;
1779 u_int32_t i;
1780
1781 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1782
1783 if (!strncmp(av, "any", strlen(av)))
1784 return;
1785
1786 if (!strncmp(av, "me", strlen(av))) {
1787 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1788 return;
1789 }
1790
1791 p = strchr(av, '/');
1792 if (!p)
1793 p = strchr(av, ':');
1794 if (p) {
1795 md = *p;
1796 *p++ = '\0';
1797 }
1798
1799 if (lookup_host(av, &cmd->addr) != 0)
1800 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1801 switch (md) {
1802 case ':':
1803 if (!inet_aton(p, &cmd->mask))
1804 errx(EX_DATAERR, "bad netmask ``%s''", p);
1805 break;
1806 case '/':
1807 i = atoi(p);
1808 if (i == 0)
1809 cmd->mask.s_addr = htonl(0);
1810 else if (i > 32)
1811 errx(EX_DATAERR, "bad width ``%s''", p);
1812 else
1813 cmd->mask.s_addr = htonl(~0 << (32 - i));
1814 break;
1815 default:
1816 cmd->mask.s_addr = htonl(~0);
1817 break;
1818 }
1819 cmd->addr.s_addr &= cmd->mask.s_addr;
1820 /*
1821 * now look if we have a set of addresses. They are stored as follows:
1822 * arg1 is the set size (powers of 2, 2..256)
1823 * addr is the base address IN HOST FORMAT
1824 * mask.. is an array of u_int32_t with bits set.
1825 */
1826 if (p)
1827 p = strchr(p, '{');
1828 if (p) { /* fetch addresses */
1829 u_int32_t *d;
1830 int low, high;
1831 int i = contigmask((u_char *)&(cmd->mask), 32);
1832
1833 if (i < 24 || i > 31) {
1834 fprintf(stderr, "invalid set with mask %d\n",
1835 i);
1836 exit(0);
1837 }
1838 cmd->o.arg1 = 1<<(32-i);
1839 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1840 d = (u_int32_t *)&cmd->mask;
1841 cmd->o.opcode = O_IP_DST_SET; /* default */
1842 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1843 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
1844 d[i] = 0; /* clear masks */
1845
1846 av = p+1;
1847 low = cmd->addr.s_addr & 0xff;
1848 high = low + cmd->o.arg1 - 1;
1849 while (isdigit(*av)) {
1850 char *s;
1851 u_int16_t a = strtol(av, &s, 0);
1852
1853 if (s == av) /* no parameter */
1854 break;
1855 if (a < low || a > high) {
1856 fprintf(stderr, "addr %d out of range [%d-%d]\n",
1857 a, low, high);
1858 exit(0);
1859 }
1860 a -= low;
1861 d[ a/32] |= 1<<(a & 31);
1862 if (*s != ',')
1863 break;
1864 av = s+1;
1865 }
1866 return;
1867 }
1868
1869 if (cmd->mask.s_addr == 0) { /* any */
1870 if (cmd->o.len & F_NOT)
1871 errx(EX_DATAERR, "not any never matches");
1872 else /* useless, nuke it */
1873 return;
1874 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */
1875 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1876 else /* addr/mask */
1877 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1878 }
1879
1880
1881 /*
1882 * helper function to process a set of flags and set bits in the
1883 * appropriate masks.
1884 */
1885 static void
1886 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
1887 struct _s_x *flags, char *p)
1888 {
1889 u_int8_t set=0, clear=0;
1890
1891 while (p && *p) {
1892 char *q; /* points to the separator */
1893 int val;
1894 u_int8_t *which; /* mask we are working on */
1895
1896 if (*p == '!') {
1897 p++;
1898 which = &clear;
1899 } else
1900 which = &set;
1901 q = strchr(p, ',');
1902 if (q)
1903 *q++ = '\0';
1904 val = match_token(flags, p);
1905 if (val <= 0)
1906 errx(EX_DATAERR, "invalid flag %s", p);
1907 *which |= (u_int8_t)val;
1908 p = q;
1909 }
1910 cmd->opcode = opcode;
1911 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
1912 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
1913 }
1914
1915
1916 static void
1917 delete(int ac, char *av[])
1918 {
1919 u_int32_t rulenum;
1920 struct dn_pipe pipe;
1921 int i;
1922 int exitval = EX_OK;
1923 int do_set = 0;
1924
1925 memset(&pipe, 0, sizeof pipe);
1926
1927 av++; ac--;
1928 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
1929 do_set = 1; /* delete set */
1930 ac--; av++;
1931 }
1932
1933 /* Rule number */
1934 while (ac && isdigit(**av)) {
1935 i = atoi(*av); av++; ac--;
1936 if (do_pipe) {
1937 if (do_pipe == 1)
1938 pipe.pipe_nr = i;
1939 else
1940 pipe.fs.fs_nr = i;
1941 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
1942 &pipe, sizeof pipe);
1943 if (i) {
1944 exitval = 1;
1945 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
1946 do_pipe == 1 ? pipe.pipe_nr :
1947 pipe.fs.fs_nr);
1948 }
1949 } else {
1950 rulenum = (i & 0xffff) | (do_set << 24);
1951 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
1952 sizeof rulenum);
1953 if (i) {
1954 exitval = EX_UNAVAILABLE;
1955 warn("rule %u: setsockopt(IP_FW_DEL)",
1956 rulenum);
1957 }
1958 }
1959 }
1960 if (exitval != EX_OK)
1961 exit(exitval);
1962 }
1963
1964
1965 /*
1966 * fill the interface structure. We do not check the name as we can
1967 * create interfaces dynamically, so checking them at insert time
1968 * makes relatively little sense.
1969 * Interface names containing '*', '?', or '[' are assumed to be shell
1970 * patterns which match interfaces.
1971 */
1972 static void
1973 fill_iface(ipfw_insn_if *cmd, char *arg)
1974 {
1975 cmd->name[0] = '\0';
1976 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
1977
1978 /* Parse the interface or address */
1979 if (!strcmp(arg, "any"))
1980 cmd->o.len = 0; /* effectively ignore this command */
1981 else if (!isdigit(*arg)) {
1982 strlcpy(cmd->name, arg, sizeof(cmd->name));
1983 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
1984 } else if (!inet_aton(arg, &cmd->p.ip))
1985 errx(EX_DATAERR, "bad ip address ``%s''", arg);
1986 }
1987
1988 static unsigned long
1989 getbw(const char *str, u_short *flags, int kb)
1990 {
1991 char *end;
1992 unsigned long val;
1993 int inbytes = 0;
1994
1995 val = strtoul(str, &end, 0);
1996 if (*end == 'k' || *end == 'K') {
1997 ++end;
1998 val *= kb;
1999 } else if (*end == 'm' || *end == 'M') {
2000 ++end;
2001 val *= kb * kb;
2002 }
2003
2004 /*
2005 * Deal with bits or bytes or b(bits) or B(bytes). If there is no
2006 * trailer assume bits.
2007 */
2008 if (strncasecmp(end, "bit", 3) == 0) {
2009 ;
2010 } else if (strncasecmp(end, "byte", 4) == 0) {
2011 inbytes = 1;
2012 } else if (*end == 'b') {
2013 ;
2014 } else if (*end == 'B') {
2015 inbytes = 1;
2016 }
2017
2018 /*
2019 * Return in bits if flags is NULL, else flag bits
2020 * or bytes in flags and return the unconverted value.
2021 */
2022 if (inbytes && flags)
2023 *flags |= DN_QSIZE_IS_BYTES;
2024 else if (inbytes && flags == NULL)
2025 val *= 8;
2026 return(val);
2027 }
2028
2029 /*
2030 * the following macro returns an error message if we run out of
2031 * arguments.
2032 */
2033 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
2034
2035 static void
2036 config_pipe(int ac, char **av)
2037 {
2038 struct dn_pipe pipe;
2039 int i;
2040 char *end;
2041 u_int32_t a;
2042 void *par = NULL;
2043
2044 memset(&pipe, 0, sizeof pipe);
2045
2046 av++; ac--;
2047 /* Pipe number */
2048 if (ac && isdigit(**av)) {
2049 i = atoi(*av); av++; ac--;
2050 if (do_pipe == 1)
2051 pipe.pipe_nr = i;
2052 else
2053 pipe.fs.fs_nr = i;
2054 }
2055 while (ac > 0) {
2056 double d;
2057 int tok = match_token(dummynet_params, *av);
2058 ac--; av++;
2059
2060 switch(tok) {
2061 case TOK_NOERROR:
2062 pipe.fs.flags_fs |= DN_NOERROR;
2063 break;
2064
2065 case TOK_PLR:
2066 NEED1("plr needs argument 0..1\n");
2067 d = strtod(av[0], NULL);
2068 if (d > 1)
2069 d = 1;
2070 else if (d < 0)
2071 d = 0;
2072 pipe.fs.plr = (int)(d*0x7fffffff);
2073 ac--; av++;
2074 break;
2075
2076 case TOK_QUEUE:
2077 NEED1("queue needs queue size\n");
2078 end = NULL;
2079 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2080 ac--; av++;
2081 break;
2082
2083 case TOK_BUCKETS:
2084 NEED1("buckets needs argument\n");
2085 pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2086 ac--; av++;
2087 break;
2088
2089 case TOK_MASK:
2090 NEED1("mask needs mask specifier\n");
2091 /*
2092 * per-flow queue, mask is dst_ip, dst_port,
2093 * src_ip, src_port, proto measured in bits
2094 */
2095 par = NULL;
2096
2097 pipe.fs.flow_mask.dst_ip = 0;
2098 pipe.fs.flow_mask.src_ip = 0;
2099 pipe.fs.flow_mask.dst_port = 0;
2100 pipe.fs.flow_mask.src_port = 0;
2101 pipe.fs.flow_mask.proto = 0;
2102 end = NULL;
2103
2104 while (ac >= 1) {
2105 u_int32_t *p32 = NULL;
2106 u_int16_t *p16 = NULL;
2107
2108 tok = match_token(dummynet_params, *av);
2109 ac--; av++;
2110 switch(tok) {
2111 case TOK_ALL:
2112 /*
2113 * special case, all bits significant
2114 */
2115 pipe.fs.flow_mask.dst_ip = ~0;
2116 pipe.fs.flow_mask.src_ip = ~0;
2117 pipe.fs.flow_mask.dst_port = ~0;
2118 pipe.fs.flow_mask.src_port = ~0;
2119 pipe.fs.flow_mask.proto = ~0;
2120 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2121 goto end_mask;
2122
2123 case TOK_DSTIP:
2124 p32 = &pipe.fs.flow_mask.dst_ip;
2125 break;
2126
2127 case TOK_SRCIP:
2128 p32 = &pipe.fs.flow_mask.src_ip;
2129 break;
2130
2131 case TOK_DSTPORT:
2132 p16 = &pipe.fs.flow_mask.dst_port;
2133 break;
2134
2135 case TOK_SRCPORT:
2136 p16 = &pipe.fs.flow_mask.src_port;
2137 break;
2138
2139 case TOK_PROTO:
2140 break;
2141
2142 default:
2143 ac++; av--; /* backtrack */
2144 goto end_mask;
2145 }
2146 if (ac < 1)
2147 errx(EX_USAGE, "mask: value missing");
2148 if (*av[0] == '/') {
2149 a = strtoul(av[0]+1, &end, 0);
2150 a = (a == 32) ? ~0 : (1 << a) - 1;
2151 } else
2152 a = strtoul(av[0], &end, 0);
2153 if (p32 != NULL)
2154 *p32 = a;
2155 else if (p16 != NULL) {
2156 if (a > 65535)
2157 errx(EX_DATAERR,
2158 "mask: must be 16 bit");
2159 *p16 = (u_int16_t)a;
2160 } else {
2161 if (a > 255)
2162 errx(EX_DATAERR,
2163 "mask: must be 8 bit");
2164 pipe.fs.flow_mask.proto = (u_int8_t)a;
2165 }
2166 if (a != 0)
2167 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2168 ac--; av++;
2169 } /* end while, config masks */
2170 end_mask:
2171 break;
2172
2173 case TOK_RED:
2174 case TOK_GRED:
2175 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2176 pipe.fs.flags_fs |= DN_IS_RED;
2177 if (tok == TOK_GRED)
2178 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2179 /*
2180 * the format for parameters is w_q/min_th/max_th/max_p
2181 */
2182 if ((end = strsep(&av[0], "/"))) {
2183 double w_q = strtod(end, NULL);
2184 if (w_q > 1 || w_q <= 0)
2185 errx(EX_DATAERR, "0 < w_q <= 1");
2186 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2187 }
2188 if ((end = strsep(&av[0], "/"))) {
2189 pipe.fs.min_th = strtoul(end, &end, 0);
2190 if (*end == 'K' || *end == 'k')
2191 pipe.fs.min_th *= 1024;
2192 }
2193 if ((end = strsep(&av[0], "/"))) {
2194 pipe.fs.max_th = strtoul(end, &end, 0);
2195 if (*end == 'K' || *end == 'k')
2196 pipe.fs.max_th *= 1024;
2197 }
2198 if ((end = strsep(&av[0], "/"))) {
2199 double max_p = strtod(end, NULL);
2200 if (max_p > 1 || max_p <= 0)
2201 errx(EX_DATAERR, "0 < max_p <= 1");
2202 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2203 }
2204 ac--; av++;
2205 break;
2206
2207 case TOK_DROPTAIL:
2208 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2209 break;
2210
2211 case TOK_BW:
2212 NEED1("bw needs bandwidth or interface\n");
2213 if (do_pipe != 1)
2214 errx(EX_DATAERR, "bandwidth only valid for pipes");
2215 /*
2216 * set clocking interface or bandwidth value
2217 */
2218 if (av[0][0] >= 'a' && av[0][0] <= 'z') {
2219 int l = sizeof(pipe.if_name)-1;
2220 /* interface name */
2221 strncpy(pipe.if_name, av[0], l);
2222 pipe.if_name[l] = '\0';
2223 pipe.bandwidth = 0;
2224 } else {
2225 pipe.if_name[0] = '\0';
2226 pipe.bandwidth = strtoul(av[0], &end, 0);
2227 pipe.bandwidth = getbw(av[0], NULL, 1000);
2228 if (pipe.bandwidth < 0)
2229 errx(EX_DATAERR, "bandwidth too large");
2230 }
2231 ac--; av++;
2232 break;
2233
2234 case TOK_DELAY:
2235 if (do_pipe != 1)
2236 errx(EX_DATAERR, "delay only valid for pipes");
2237 NEED1("delay needs argument 0..10000ms\n");
2238 pipe.delay = strtoul(av[0], NULL, 0);
2239 ac--; av++;
2240 break;
2241
2242 case TOK_WEIGHT:
2243 if (do_pipe == 1)
2244 errx(EX_DATAERR,"weight only valid for queues");
2245 NEED1("weight needs argument 0..100\n");
2246 pipe.fs.weight = strtoul(av[0], &end, 0);
2247 ac--; av++;
2248 break;
2249
2250 case TOK_PIPE:
2251 if (do_pipe == 1)
2252 errx(EX_DATAERR,"pipe only valid for queues");
2253 NEED1("pipe needs pipe_number\n");
2254 pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2255 ac--; av++;
2256 break;
2257
2258 default:
2259 errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2260 }
2261 }
2262 if (do_pipe == 1) {
2263 if (pipe.pipe_nr == 0)
2264 errx(EX_DATAERR, "pipe_nr must be > 0");
2265 if (pipe.delay > 10000)
2266 errx(EX_DATAERR, "delay must be < 10000");
2267 } else { /* do_pipe == 2, queue */
2268 if (pipe.fs.parent_nr == 0)
2269 errx(EX_DATAERR, "pipe must be > 0");
2270 if (pipe.fs.weight >100)
2271 errx(EX_DATAERR, "weight must be <= 100");
2272 }
2273 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2274 if (pipe.fs.qsize > 1024*1024)
2275 errx(EX_DATAERR, "queue size must be < 1MB");
2276 } else {
2277 if (pipe.fs.qsize > 100)
2278 errx(EX_DATAERR, "2 <= queue size <= 100");
2279 }
2280 if (pipe.fs.flags_fs & DN_IS_RED) {
2281 size_t len;
2282 int lookup_depth, avg_pkt_size;
2283 double s, idle, weight, w_q;
2284 struct clockinfo clock;
2285 int t;
2286
2287 if (pipe.fs.min_th >= pipe.fs.max_th)
2288 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2289 pipe.fs.min_th, pipe.fs.max_th);
2290 if (pipe.fs.max_th == 0)
2291 errx(EX_DATAERR, "max_th must be > 0");
2292
2293 len = sizeof(int);
2294 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2295 &lookup_depth, &len, NULL, 0) == -1)
2296
2297 errx(1, "sysctlbyname(\"%s\")",
2298 "net.inet.ip.dummynet.red_lookup_depth");
2299 if (lookup_depth == 0)
2300 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2301 " must be greater than zero");
2302
2303 len = sizeof(int);
2304 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2305 &avg_pkt_size, &len, NULL, 0) == -1)
2306
2307 errx(1, "sysctlbyname(\"%s\")",
2308 "net.inet.ip.dummynet.red_avg_pkt_size");
2309 if (avg_pkt_size == 0)
2310 errx(EX_DATAERR,
2311 "net.inet.ip.dummynet.red_avg_pkt_size must"
2312 " be greater than zero");
2313
2314 len = sizeof(struct clockinfo);
2315 if (sysctlbyname("kern.clockrate", &clock, &len, NULL, 0) == -1)
2316 errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
2317
2318 /*
2319 * Ticks needed for sending a medium-sized packet.
2320 * Unfortunately, when we are configuring a WF2Q+ queue, we
2321 * do not have bandwidth information, because that is stored
2322 * in the parent pipe, and also we have multiple queues
2323 * competing for it. So we set s=0, which is not very
2324 * correct. But on the other hand, why do we want RED with
2325 * WF2Q+ ?
2326 */
2327 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2328 s = 0;
2329 else
2330 s = clock.hz * avg_pkt_size * 8 / pipe.bandwidth;
2331
2332 /*
2333 * max idle time (in ticks) before avg queue size becomes 0.
2334 * NOTA: (3/w_q) is approx the value x so that
2335 * (1-w_q)^x < 10^-3.
2336 */
2337 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2338 idle = s * 3. / w_q;
2339 pipe.fs.lookup_step = (int)idle / lookup_depth;
2340 if (!pipe.fs.lookup_step)
2341 pipe.fs.lookup_step = 1;
2342 weight = 1 - w_q;
2343 for (t = pipe.fs.lookup_step; t > 0; --t)
2344 weight *= weight;
2345 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2346 }
2347 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2348 sizeof pipe);
2349 if (i)
2350 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2351 }
2352
2353 static void
2354 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2355 {
2356 int i, l;
2357
2358 for (i=0; i<6; i++)
2359 addr[i] = mask[i] = 0;
2360 if (!strcmp(p, "any"))
2361 return;
2362
2363 for (i=0; *p && i<6;i++, p++) {
2364 addr[i] = strtol(p, &p, 16);
2365 if (*p != ':') /* we start with the mask */
2366 break;
2367 }
2368 if (*p == '/') { /* mask len */
2369 l = strtol(p+1, &p, 0);
2370 for (i=0; l>0; l -=8, i++)
2371 mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
2372 } else if (*p == '&') { /* mask */
2373 for (i=0, p++; *p && i<6;i++, p++) {
2374 mask[i] = strtol(p, &p, 16);
2375 if (*p != ':')
2376 break;
2377 }
2378 } else if (*p == '\0') {
2379 for (i=0; i<6; i++)
2380 mask[i] = 0xff;
2381 }
2382 for (i=0; i<6; i++)
2383 addr[i] &= mask[i];
2384 }
2385
2386 /*
2387 * helper function, updates the pointer to cmd with the length
2388 * of the current command, and also cleans up the first word of
2389 * the new command in case it has been clobbered before.
2390 */
2391 static ipfw_insn *
2392 next_cmd(ipfw_insn *cmd)
2393 {
2394 cmd += F_LEN(cmd);
2395 bzero(cmd, sizeof(*cmd));
2396 return cmd;
2397 }
2398
2399 /*
2400 * A function to fill simple commands of size 1.
2401 * Existing flags are preserved.
2402 */
2403 static void
2404 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2405 {
2406 cmd->opcode = opcode;
2407 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2408 cmd->arg1 = arg;
2409 }
2410
2411 /*
2412 * Fetch and add the MAC address and type, with masks. This generates one or
2413 * two microinstructions, and returns the pointer to the last one.
2414 */
2415 static ipfw_insn *
2416 add_mac(ipfw_insn *cmd, int ac, char *av[])
2417 {
2418 ipfw_insn_mac *mac;
2419
2420 if (ac < 2)
2421 errx(EX_DATAERR, "MAC dst src");
2422
2423 cmd->opcode = O_MACADDR2;
2424 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2425
2426 mac = (ipfw_insn_mac *)cmd;
2427 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2428 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2429 return cmd;
2430 }
2431
2432 static ipfw_insn *
2433 add_mactype(ipfw_insn *cmd, int ac, char *av)
2434 {
2435 if (ac < 1)
2436 errx(EX_DATAERR, "missing MAC type");
2437 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2438 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2439 cmd->opcode = O_MAC_TYPE;
2440 return cmd;
2441 } else
2442 return NULL;
2443 }
2444
2445 static ipfw_insn *
2446 add_proto(ipfw_insn *cmd, char *av)
2447 {
2448 struct protoent *pe;
2449 u_char proto = 0;
2450
2451 if (!strncmp(av, "all", strlen(av)))
2452 ; /* same as "ip" */
2453 else if ((proto = atoi(av)) > 0)
2454 ; /* all done! */
2455 else if ((pe = getprotobyname(av)) != NULL)
2456 proto = pe->p_proto;
2457 else
2458 return NULL;
2459 if (proto != IPPROTO_IP)
2460 fill_cmd(cmd, O_PROTO, 0, proto);
2461 return cmd;
2462 }
2463
2464 static ipfw_insn *
2465 add_srcip(ipfw_insn *cmd, char *av)
2466 {
2467 fill_ip((ipfw_insn_ip *)cmd, av);
2468 if (cmd->opcode == O_IP_DST_SET) /* set */
2469 cmd->opcode = O_IP_SRC_SET;
2470 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2471 cmd->opcode = O_IP_SRC_ME;
2472 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2473 cmd->opcode = O_IP_SRC;
2474 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2475 cmd->opcode = O_IP_SRC_MASK;
2476 return cmd;
2477 }
2478
2479 static ipfw_insn *
2480 add_dstip(ipfw_insn *cmd, char *av)
2481 {
2482 fill_ip((ipfw_insn_ip *)cmd, av);
2483 if (cmd->opcode == O_IP_DST_SET) /* set */
2484 ;
2485 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2486 cmd->opcode = O_IP_DST_ME;
2487 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2488 cmd->opcode = O_IP_DST;
2489 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2490 cmd->opcode = O_IP_DST_MASK;
2491 return cmd;
2492 }
2493
2494 static ipfw_insn *
2495 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2496 {
2497 if (!strncmp(av, "any", strlen(av))) {
2498 return NULL;
2499 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2500 /* XXX todo: check that we have a protocol with ports */
2501 cmd->opcode = opcode;
2502 return cmd;
2503 }
2504 return NULL;
2505 }
2506
2507 /*
2508 * Parse arguments and assemble the microinstructions which make up a rule.
2509 * Rules are added into the 'rulebuf' and then copied in the correct order
2510 * into the actual rule.
2511 *
2512 * The syntax for a rule starts with the action, followed by an
2513 * optional log action, and the various match patterns.
2514 * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2515 * (generated if the rule includes a keep-state option), then the
2516 * various match patterns, the "log" action, and the actual action.
2517 *
2518 */
2519 static void
2520 add(int ac, char *av[])
2521 {
2522 /*
2523 * rules are added into the 'rulebuf' and then copied in
2524 * the correct order into the actual rule.
2525 * Some things that need to go out of order (prob, action etc.)
2526 * go into actbuf[].
2527 */
2528 static u_int32_t rulebuf[255], actbuf[255], cmdbuf[255];
2529
2530 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2531 ipfw_insn *first_cmd; /* first match pattern */
2532
2533 struct ip_fw *rule;
2534
2535 /*
2536 * various flags used to record that we entered some fields.
2537 */
2538 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2539
2540 int i;
2541
2542 int open_par = 0; /* open parenthesis ( */
2543
2544 /* proto is here because it is used to fetch ports */
2545 u_char proto = IPPROTO_IP; /* default protocol */
2546
2547 double match_prob = 1; /* match probability, default is always match */
2548
2549 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2550 bzero(cmdbuf, sizeof(cmdbuf));
2551 bzero(rulebuf, sizeof(rulebuf));
2552
2553 rule = (struct ip_fw *)rulebuf;
2554 cmd = (ipfw_insn *)cmdbuf;
2555 action = (ipfw_insn *)actbuf;
2556
2557 av++; ac--;
2558
2559 /* [rule N] -- Rule number optional */
2560 if (ac && isdigit(**av)) {
2561 rule->rulenum = atoi(*av);
2562 av++;
2563 ac--;
2564 }
2565
2566 /* [set N] -- set number (0..30), optional */
2567 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2568 int set = strtoul(av[1], NULL, 10);
2569 if (set < 0 || set > 30)
2570 errx(EX_DATAERR, "illegal set %s", av[1]);
2571 rule->set = set;
2572 av += 2; ac -= 2;
2573 }
2574
2575 /* [prob D] -- match probability, optional */
2576 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2577 match_prob = strtod(av[1], NULL);
2578
2579 if (match_prob <= 0 || match_prob > 1)
2580 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2581 av += 2; ac -= 2;
2582 }
2583
2584 /* action -- mandatory */
2585 NEED1("missing action");
2586 i = match_token(rule_actions, *av);
2587 ac--; av++;
2588 action->len = 1; /* default */
2589 switch(i) {
2590 case TOK_CHECKSTATE:
2591 have_state = action;
2592 action->opcode = O_CHECK_STATE;
2593 break;
2594
2595 case TOK_ACCEPT:
2596 action->opcode = O_ACCEPT;
2597 break;
2598
2599 case TOK_DENY:
2600 action->opcode = O_DENY;
2601 action->arg1 = 0;
2602 break;
2603
2604 case TOK_REJECT:
2605 action->opcode = O_REJECT;
2606 action->arg1 = ICMP_UNREACH_HOST;
2607 break;
2608
2609 case TOK_RESET:
2610 action->opcode = O_REJECT;
2611 action->arg1 = ICMP_REJECT_RST;
2612 break;
2613
2614 case TOK_UNREACH:
2615 action->opcode = O_REJECT;
2616 NEED1("missing reject code");
2617 fill_reject_code(&action->arg1, *av);
2618 ac--; av++;
2619 break;
2620
2621 case TOK_COUNT:
2622 action->opcode = O_COUNT;
2623 break;
2624
2625 case TOK_QUEUE:
2626 case TOK_PIPE:
2627 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2628 case TOK_SKIPTO:
2629 if (i == TOK_QUEUE)
2630 action->opcode = O_QUEUE;
2631 else if (i == TOK_PIPE)
2632 action->opcode = O_PIPE;
2633 else if (i == TOK_SKIPTO)
2634 action->opcode = O_SKIPTO;
2635 NEED1("missing skipto/pipe/queue number");
2636 action->arg1 = strtoul(*av, NULL, 10);
2637 av++; ac--;
2638 break;
2639
2640 case TOK_DIVERT:
2641 case TOK_TEE:
2642 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2643 NEED1("missing divert/tee port");
2644 action->arg1 = strtoul(*av, NULL, 0);
2645 if (action->arg1 == 0) {
2646 struct servent *s;
2647 setservent(1);
2648 s = getservbyname(av[0], "divert");
2649 if (s != NULL)
2650 action->arg1 = ntohs(s->s_port);
2651 else
2652 errx(EX_DATAERR, "illegal divert/tee port");
2653 }
2654 ac--; av++;
2655 break;
2656
2657 case TOK_FORWARD: {
2658 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2659 char *s, *end;
2660
2661 NEED1("missing forward address[:port]");
2662
2663 action->opcode = O_FORWARD_IP;
2664 action->len = F_INSN_SIZE(ipfw_insn_sa);
2665
2666 p->sa.sin_len = sizeof(struct sockaddr_in);
2667 p->sa.sin_family = AF_INET;
2668 p->sa.sin_port = 0;
2669 /*
2670 * locate the address-port separator (':' or ',')
2671 */
2672 s = strchr(*av, ':');
2673 if (s == NULL)
2674 s = strchr(*av, ',');
2675 if (s != NULL) {
2676 *(s++) = '\0';
2677 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2678 if (s == end)
2679 errx(EX_DATAERR,
2680 "illegal forwarding port ``%s''", s);
2681 p->sa.sin_port = (u_short)i;
2682 }
2683 lookup_host(*av, &(p->sa.sin_addr));
2684 }
2685 ac--; av++;
2686 break;
2687
2688 default:
2689 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2690 }
2691 action = next_cmd(action);
2692
2693 /*
2694 * [log [logamount N]] -- log, optional
2695 *
2696 * If exists, it goes first in the cmdbuf, but then it is
2697 * skipped in the copy section to the end of the buffer.
2698 */
2699 if (ac && !strncmp(*av, "log", strlen(*av))) {
2700 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2701
2702 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2703 cmd->opcode = O_LOG;
2704 av++; ac--;
2705 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2706 ac--; av++;
2707 NEED1("logamount requires argument");
2708 c->max_log = atoi(*av);
2709 if (c->max_log < 0)
2710 errx(EX_DATAERR, "logamount must be positive");
2711 ac--; av++;
2712 }
2713 cmd = next_cmd(cmd);
2714 }
2715
2716 if (have_state) /* must be a check-state, we are done */
2717 goto done;
2718
2719 #define OR_START(target) \
2720 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2721 if (open_par) \
2722 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2723 prev = NULL; \
2724 open_par = 1; \
2725 if ( (av[0])[1] == '\0') { \
2726 ac--; av++; \
2727 } else \
2728 (*av)++; \
2729 } \
2730 target: \
2731
2732
2733 #define CLOSE_PAR \
2734 if (open_par) { \
2735 if (ac && ( \
2736 !strncmp(*av, ")", strlen(*av)) || \
2737 !strncmp(*av, "}", strlen(*av)) )) { \
2738 prev = NULL; \
2739 open_par = 0; \
2740 ac--; av++; \
2741 } else \
2742 errx(EX_USAGE, "missing \")\"\n"); \
2743 }
2744
2745 #define NOT_BLOCK \
2746 if (ac && !strncmp(*av, "not", strlen(*av))) { \
2747 if (cmd->len & F_NOT) \
2748 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2749 cmd->len |= F_NOT; \
2750 ac--; av++; \
2751 }
2752
2753 #define OR_BLOCK(target) \
2754 if (ac && !strncmp(*av, "or", strlen(*av))) { \
2755 if (prev == NULL || open_par == 0) \
2756 errx(EX_DATAERR, "invalid OR block"); \
2757 prev->len |= F_OR; \
2758 ac--; av++; \
2759 goto target; \
2760 } \
2761 CLOSE_PAR;
2762
2763 first_cmd = cmd;
2764
2765 #if 0
2766 /*
2767 * MAC addresses, optional.
2768 * If we have this, we skip the part "proto from src to dst"
2769 * and jump straight to the option parsing.
2770 */
2771 NOT_BLOCK;
2772 NEED1("missing protocol");
2773 if (!strncmp(*av, "MAC", strlen(*av)) ||
2774 !strncmp(*av, "mac", strlen(*av))) {
2775 ac--; av++; /* the "MAC" keyword */
2776 add_mac(cmd, ac, av); /* exits in case of errors */
2777 cmd = next_cmd(cmd);
2778 ac -= 2; av += 2; /* dst-mac and src-mac */
2779 NOT_BLOCK;
2780 NEED1("missing mac type");
2781 if (add_mactype(cmd, ac, av[0]))
2782 cmd = next_cmd(cmd);
2783 ac--; av++; /* any or mac-type */
2784 goto read_options;
2785 }
2786 #endif
2787
2788 /*
2789 * protocol, mandatory
2790 */
2791 OR_START(get_proto);
2792 NOT_BLOCK;
2793 NEED1("missing protocol");
2794 if (add_proto(cmd, *av)) {
2795 av++; ac--;
2796 if (F_LEN(cmd) == 0) /* plain IP */
2797 proto = 0;
2798 else {
2799 proto = cmd->arg1;
2800 prev = cmd;
2801 cmd = next_cmd(cmd);
2802 }
2803 } else if (first_cmd != cmd) {
2804 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2805 } else
2806 goto read_options;
2807 OR_BLOCK(get_proto);
2808
2809 /*
2810 * "from", mandatory
2811 */
2812 if (!ac || strncmp(*av, "from", strlen(*av)))
2813 errx(EX_USAGE, "missing ``from''");
2814 ac--; av++;
2815
2816 /*
2817 * source IP, mandatory
2818 */
2819 OR_START(source_ip);
2820 NOT_BLOCK; /* optional "not" */
2821 NEED1("missing source address");
2822 if (add_srcip(cmd, *av)) {
2823 ac--; av++;
2824 if (F_LEN(cmd) != 0) { /* ! any */
2825 prev = cmd;
2826 cmd = next_cmd(cmd);
2827 }
2828 }
2829 OR_BLOCK(source_ip);
2830
2831 /*
2832 * source ports, optional
2833 */
2834 NOT_BLOCK; /* optional "not" */
2835 if (ac) {
2836 if (!strncmp(*av, "any", strlen(*av)) ||
2837 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2838 ac--; av++;
2839 if (F_LEN(cmd) != 0)
2840 cmd = next_cmd(cmd);
2841 }
2842 }
2843
2844 /*
2845 * "to", mandatory
2846 */
2847 if (!ac || strncmp(*av, "to", strlen(*av)))
2848 errx(EX_USAGE, "missing ``to''");
2849 av++; ac--;
2850
2851 /*
2852 * destination, mandatory
2853 */
2854 OR_START(dest_ip);
2855 NOT_BLOCK; /* optional "not" */
2856 NEED1("missing dst address");
2857 if (add_dstip(cmd, *av)) {
2858 ac--; av++;
2859 if (F_LEN(cmd) != 0) { /* ! any */
2860 prev = cmd;
2861 cmd = next_cmd(cmd);
2862 }
2863 }
2864 OR_BLOCK(dest_ip);
2865
2866 /*
2867 * dest. ports, optional
2868 */
2869 NOT_BLOCK; /* optional "not" */
2870 if (ac) {
2871 if (!strncmp(*av, "any", strlen(*av)) ||
2872 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
2873 ac--; av++;
2874 if (F_LEN(cmd) != 0)
2875 cmd = next_cmd(cmd);
2876 }
2877 }
2878
2879 read_options:
2880 if (ac && first_cmd == cmd) {
2881 /*
2882 * nothing specified so far, store in the rule to ease
2883 * printout later.
2884 */
2885 rule->_pad = 1;
2886 }
2887 prev = NULL;
2888 while (ac) {
2889 char *s;
2890 ipfw_insn_u32 *cmd32; /* alias for cmd */
2891
2892 s = *av;
2893 cmd32 = (ipfw_insn_u32 *)cmd;
2894
2895 if (*s == '!') { /* alternate syntax for NOT */
2896 if (cmd->len & F_NOT)
2897 errx(EX_USAGE, "double \"not\" not allowed\n");
2898 cmd->len = F_NOT;
2899 s++;
2900 }
2901 i = match_token(rule_options, s);
2902 ac--; av++;
2903 switch(i) {
2904 case TOK_NOT:
2905 if (cmd->len & F_NOT)
2906 errx(EX_USAGE, "double \"not\" not allowed\n");
2907 cmd->len = F_NOT;
2908 break;
2909
2910 case TOK_OR:
2911 if (open_par == 0 || prev == NULL)
2912 errx(EX_USAGE, "invalid \"or\" block\n");
2913 prev->len |= F_OR;
2914 break;
2915
2916 case TOK_STARTBRACE:
2917 if (open_par)
2918 errx(EX_USAGE, "+nested \"(\" not allowed\n");
2919 open_par = 1;
2920 break;
2921
2922 case TOK_ENDBRACE:
2923 if (!open_par)
2924 errx(EX_USAGE, "+missing \")\"\n");
2925 open_par = 0;
2926 prev = NULL;
2927 break;
2928
2929 case TOK_IN:
2930 fill_cmd(cmd, O_IN, 0, 0);
2931 break;
2932
2933 case TOK_OUT:
2934 cmd->len ^= F_NOT; /* toggle F_NOT */
2935 fill_cmd(cmd, O_IN, 0, 0);
2936 break;
2937
2938 case TOK_FRAG:
2939 fill_cmd(cmd, O_FRAG, 0, 0);
2940 break;
2941
2942 case TOK_LAYER2:
2943 fill_cmd(cmd, O_LAYER2, 0, 0);
2944 break;
2945
2946 case TOK_XMIT:
2947 case TOK_RECV:
2948 case TOK_VIA:
2949 NEED1("recv, xmit, via require interface name"
2950 " or address");
2951 fill_iface((ipfw_insn_if *)cmd, av[0]);
2952 ac--; av++;
2953 if (F_LEN(cmd) == 0) /* not a valid address */
2954 break;
2955 if (i == TOK_XMIT)
2956 cmd->opcode = O_XMIT;
2957 else if (i == TOK_RECV)
2958 cmd->opcode = O_RECV;
2959 else if (i == TOK_VIA)
2960 cmd->opcode = O_VIA;
2961 break;
2962
2963 case TOK_ICMPTYPES:
2964 NEED1("icmptypes requires list of types");
2965 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
2966 av++; ac--;
2967 break;
2968
2969 case TOK_IPTTL:
2970 NEED1("ipttl requires TTL");
2971 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
2972 ac--; av++;
2973 break;
2974
2975 case TOK_IPID:
2976 NEED1("ipid requires length");
2977 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
2978 ac--; av++;
2979 break;
2980
2981 case TOK_IPLEN:
2982 NEED1("iplen requires length");
2983 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
2984 ac--; av++;
2985 break;
2986
2987 case TOK_IPVER:
2988 NEED1("ipver requires version");
2989 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
2990 ac--; av++;
2991 break;
2992
2993 case TOK_IPPRECEDENCE:
2994 NEED1("ipprecedence requires value");
2995 fill_cmd(cmd, O_IPPRECEDENCE, 0,
2996 (strtoul(*av, NULL, 0) & 7) << 5);
2997 ac--; av++;
2998 break;
2999
3000 case TOK_IPOPTS:
3001 NEED1("missing argument for ipoptions");
3002 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3003 ac--; av++;
3004 break;
3005
3006 case TOK_IPTOS:
3007 NEED1("missing argument for iptos");
3008 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3009 ac--; av++;
3010 break;
3011
3012 case TOK_UID:
3013 NEED1("uid requires argument");
3014 {
3015 char *end;
3016 uid_t uid;
3017 struct passwd *pwd;
3018
3019 cmd->opcode = O_UID;
3020 uid = strtoul(*av, &end, 0);
3021 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3022 if (pwd == NULL)
3023 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3024 cmd32->d[0] = pwd->pw_uid;
3025 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3026 ac--; av++;
3027 }
3028 break;
3029
3030 case TOK_GID:
3031 NEED1("gid requires argument");
3032 {
3033 char *end;
3034 gid_t gid;
3035 struct group *grp;
3036
3037 cmd->opcode = O_GID;
3038 gid = strtoul(*av, &end, 0);
3039 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3040 if (grp == NULL)
3041 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3042 cmd32->d[0] = grp->gr_gid;
3043 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3044 ac--; av++;
3045 }
3046 break;
3047
3048 case TOK_ESTAB:
3049 fill_cmd(cmd, O_ESTAB, 0, 0);
3050 break;
3051
3052 case TOK_SETUP:
3053 fill_cmd(cmd, O_TCPFLAGS, 0,
3054 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3055 break;
3056
3057 case TOK_TCPOPTS:
3058 NEED1("missing argument for tcpoptions");
3059 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3060 ac--; av++;
3061 break;
3062
3063 case TOK_TCPSEQ:
3064 case TOK_TCPACK:
3065 NEED1("tcpseq/tcpack requires argument");
3066 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3067 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3068 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3069 ac--; av++;
3070 break;
3071
3072 case TOK_TCPWIN:
3073 NEED1("tcpwin requires length");
3074 fill_cmd(cmd, O_TCPWIN, 0,
3075 htons(strtoul(*av, NULL, 0)));
3076 ac--; av++;
3077 break;
3078
3079 case TOK_TCPFLAGS:
3080 NEED1("missing argument for tcpflags");
3081 cmd->opcode = O_TCPFLAGS;
3082 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3083 ac--; av++;
3084 break;
3085
3086 case TOK_KEEPSTATE:
3087 if (open_par)
3088 errx(EX_USAGE, "keep-state cannot be part "
3089 "of an or block");
3090 if (have_state)
3091 errx(EX_USAGE, "only one of keep-state "
3092 "and limit is allowed");
3093 have_state = cmd;
3094 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3095 break;
3096
3097 case TOK_LIMIT:
3098 if (open_par)
3099 errx(EX_USAGE, "limit cannot be part "
3100 "of an or block");
3101 if (have_state)
3102 errx(EX_USAGE, "only one of keep-state "
3103 "and limit is allowed");
3104 NEED1("limit needs mask and # of connections");
3105 have_state = cmd;
3106 {
3107 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3108
3109 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3110 cmd->opcode = O_LIMIT;
3111 c->limit_mask = 0;
3112 c->conn_limit = 0;
3113 for (; ac >1 ;) {
3114 int val;
3115
3116 val = match_token(limit_masks, *av);
3117 if (val <= 0)
3118 break;
3119 c->limit_mask |= val;
3120 ac--; av++;
3121 }
3122 c->conn_limit = atoi(*av);
3123 if (c->conn_limit == 0)
3124 errx(EX_USAGE, "limit: limit must be >0");
3125 if (c->limit_mask == 0)
3126 errx(EX_USAGE, "missing limit mask");
3127 ac--; av++;
3128 }
3129 break;
3130
3131 case TOK_PROTO:
3132 NEED1("missing protocol");
3133 if (add_proto(cmd, *av)) {
3134 proto = cmd->arg1;
3135 ac--; av++;
3136 } else
3137 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3138 break;
3139
3140 case TOK_SRCIP:
3141 NEED1("missing source IP");
3142 if (add_srcip(cmd, *av)) {
3143 ac--; av++;
3144 }
3145 break;
3146
3147 case TOK_DSTIP:
3148 NEED1("missing destination IP");
3149 if (add_dstip(cmd, *av)) {
3150 ac--; av++;
3151 }
3152 break;
3153
3154 case TOK_SRCPORT:
3155 NEED1("missing source port");
3156 if (!strncmp(*av, "any", strlen(*av)) ||
3157 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3158 ac--; av++;
3159 } else
3160 errx(EX_DATAERR, "invalid source port %s", *av);
3161 break;
3162
3163 case TOK_DSTPORT:
3164 NEED1("missing destination port");
3165 if (!strncmp(*av, "any", strlen(*av)) ||
3166 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3167 ac--; av++;
3168 } else
3169 errx(EX_DATAERR, "invalid destination port %s",
3170 *av);
3171 break;
3172
3173 case TOK_MAC:
3174 if (ac < 2)
3175 errx(EX_USAGE, "MAC dst-mac src-mac");
3176 if (add_mac(cmd, ac, av)) {
3177 ac -= 2; av += 2;
3178 }
3179 break;
3180
3181 case TOK_MACTYPE:
3182 NEED1("missing mac type");
3183 if (!add_mactype(cmd, ac, *av))
3184 errx(EX_DATAERR, "invalid mac type %s", *av);
3185 ac--; av++;
3186 break;
3187
3188 default:
3189 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3190 }
3191 if (F_LEN(cmd) > 0) { /* prepare to advance */
3192 prev = cmd;
3193 cmd = next_cmd(cmd);
3194 }
3195 }
3196
3197 done:
3198 /*
3199 * Now copy stuff into the rule.
3200 * If we have a keep-state option, the first instruction
3201 * must be a PROBE_STATE (which is generated here).
3202 * If we have a LOG option, it was stored as the first command,
3203 * and now must be moved to the top of the action part.
3204 */
3205 dst = (ipfw_insn *)rule->cmd;
3206
3207 /*
3208 * First thing to write into the command stream is the match probability.
3209 */
3210 if (match_prob != 1) { /* 1 means always match */
3211 dst->opcode = O_PROB;
3212 dst->len = 2;
3213 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3214 dst += dst->len;
3215 }
3216
3217 /*
3218 * generate O_PROBE_STATE if necessary
3219 */
3220 if (have_state && have_state->opcode != O_CHECK_STATE) {
3221 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3222 dst = next_cmd(dst);
3223 }
3224 /*
3225 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT
3226 */
3227 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3228 i = F_LEN(src);
3229
3230 switch (src->opcode) {
3231 case O_LOG:
3232 case O_KEEP_STATE:
3233 case O_LIMIT:
3234 break;
3235 default:
3236 bcopy(src, dst, i * sizeof(u_int32_t));
3237 dst += i;
3238 }
3239 }
3240
3241 /*
3242 * put back the have_state command as last opcode
3243 */
3244 if (have_state && have_state->opcode != O_CHECK_STATE) {
3245 i = F_LEN(have_state);
3246 bcopy(have_state, dst, i * sizeof(u_int32_t));
3247 dst += i;
3248 }
3249 /*
3250 * start action section
3251 */
3252 rule->act_ofs = dst - rule->cmd;
3253
3254 /*
3255 * put back O_LOG if necessary
3256 */
3257 src = (ipfw_insn *)cmdbuf;
3258 if ( src->opcode == O_LOG ) {
3259 i = F_LEN(src);
3260 bcopy(src, dst, i * sizeof(u_int32_t));
3261 dst += i;
3262 }
3263 /*
3264 * copy all other actions
3265 */
3266 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3267 i = F_LEN(src);
3268 bcopy(src, dst, i * sizeof(u_int32_t));
3269 dst += i;
3270 }
3271
3272 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3273 i = (void *)dst - (void *)rule;
3274 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3275 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3276 if (!do_quiet)
3277 show_ipfw(rule, 10, 10);
3278 }
3279
3280 static void
3281 zero(int ac, char *av[])
3282 {
3283 int rulenum;
3284 int failed = EX_OK;
3285
3286 av++; ac--;
3287
3288 if (!ac) {
3289 /* clear all entries */
3290 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3291 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3292 if (!do_quiet)
3293 printf("Accounting cleared.\n");
3294
3295 return;
3296 }
3297
3298 while (ac) {
3299 /* Rule number */
3300 if (isdigit(**av)) {
3301 rulenum = atoi(*av);
3302 av++;
3303 ac--;
3304 if (setsockopt(s, IPPROTO_IP,
3305 IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3306 warn("rule %u: setsockopt(IP_FW_ZERO)",
3307 rulenum);
3308 failed = EX_UNAVAILABLE;
3309 } else if (!do_quiet)
3310 printf("Entry %d cleared\n", rulenum);
3311 } else {
3312 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3313 }
3314 }
3315 if (failed != EX_OK)
3316 exit(failed);
3317 }
3318
3319 static void
3320 resetlog(int ac, char *av[])
3321 {
3322 int rulenum;
3323 int failed = EX_OK;
3324
3325 av++; ac--;
3326
3327 if (!ac) {
3328 /* clear all entries */
3329 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3330 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3331 if (!do_quiet)
3332 printf("Logging counts reset.\n");
3333
3334 return;
3335 }
3336
3337 while (ac) {
3338 /* Rule number */
3339 if (isdigit(**av)) {
3340 rulenum = atoi(*av);
3341 av++;
3342 ac--;
3343 if (setsockopt(s, IPPROTO_IP,
3344 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3345 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3346 rulenum);
3347 failed = EX_UNAVAILABLE;
3348 } else if (!do_quiet)
3349 printf("Entry %d logging count reset\n",
3350 rulenum);
3351 } else {
3352 errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3353 }
3354 }
3355 if (failed != EX_OK)
3356 exit(failed);
3357 }
3358
3359 static void
3360 flush(void)
3361 {
3362 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3363
3364 if (!do_force && !do_quiet) { /* need to ask user */
3365 int c;
3366
3367 printf("Are you sure? [yn] ");
3368 fflush(stdout);
3369 do {
3370 c = toupper(getc(stdin));
3371 while (c != '\n' && getc(stdin) != '\n')
3372 if (feof(stdin))
3373 return; /* and do not flush */
3374 } while (c != 'Y' && c != 'N');
3375 printf("\n");
3376 if (c == 'N') /* user said no */
3377 return;
3378 }
3379 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3380 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3381 do_pipe ? "DUMMYNET" : "FW");
3382 if (!do_quiet)
3383 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3384 }
3385
3386 static int
3387 ipfw_main(int ac, char **av)
3388 {
3389 int ch;
3390
3391 if (ac == 1)
3392 show_usage();
3393
3394 /* Set the force flag for non-interactive processes */
3395 do_force = !isatty(STDIN_FILENO);
3396
3397 optind = optreset = 1;
3398 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3399 switch (ch) {
3400 case 'h': /* help */
3401 help();
3402 break; /* NOTREACHED */
3403
3404 case 's': /* sort */
3405 do_sort = atoi(optarg);
3406 break;
3407 case 'a':
3408 do_acct = 1;
3409 break;
3410 case 'c':
3411 do_compact = 1;
3412 break;
3413 case 'd':
3414 do_dynamic = 1;
3415 break;
3416 case 'e':
3417 do_expired = 1;
3418 break;
3419 case 'f':
3420 do_force = 1;
3421 break;
3422 case 'N':
3423 do_resolv = 1;
3424 break;
3425 case 'q':
3426 do_quiet = 1;
3427 break;
3428 case 'S':
3429 show_sets = 1;
3430 break;
3431 case 't':
3432 do_time = 1;
3433 break;
3434 case 'v': /* verbose */
3435 verbose++;
3436 break;
3437 default:
3438 show_usage();
3439 }
3440
3441 ac -= optind;
3442 av += optind;
3443 NEED1("bad arguments, for usage summary ``ipfw''");
3444
3445 /*
3446 * optional: pipe or queue
3447 */
3448 if (!strncmp(*av, "pipe", strlen(*av))) {
3449 do_pipe = 1;
3450 ac--;
3451 av++;
3452 } else if (!strncmp(*av, "queue", strlen(*av))) {
3453 do_pipe = 2;
3454 ac--;
3455 av++;
3456 }
3457 NEED1("missing command");
3458
3459 /*
3460 * for pipes and queues we normally say 'pipe NN config'
3461 * but the code is easier to parse as 'pipe config NN'
3462 * so we swap the two arguments.
3463 */
3464 if (do_pipe > 0 && ac > 1 && *av[0] >= '0' && *av[0] <= '9') {
3465 char *p = av[0];
3466 av[0] = av[1];
3467 av[1] = p;
3468 }
3469 if (!strncmp(*av, "add", strlen(*av)))
3470 add(ac, av);
3471 else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
3472 config_pipe(ac, av);
3473 else if (!strncmp(*av, "delete", strlen(*av)))
3474 delete(ac, av);
3475 else if (!strncmp(*av, "flush", strlen(*av)))
3476 flush();
3477 else if (!strncmp(*av, "zero", strlen(*av)))
3478 zero(ac, av);
3479 else if (!strncmp(*av, "resetlog", strlen(*av)))
3480 resetlog(ac, av);
3481 else if (!strncmp(*av, "print", strlen(*av)) ||
3482 !strncmp(*av, "list", strlen(*av)))
3483 list(ac, av);
3484 else if (!strncmp(*av, "enable", strlen(*av)))
3485 sysctl_handler(ac, av, 1);
3486 else if (!strncmp(*av, "disable", strlen(*av)))
3487 sysctl_handler(ac, av, 0);
3488 else if (!strncmp(*av, "set", strlen(*av)))
3489 sets_handler(ac, av);
3490 else if (!strncmp(*av, "show", strlen(*av))) {
3491 do_acct++;
3492 list(ac, av);
3493 } else
3494 errx(EX_USAGE, "bad command `%s'", *av);
3495 return 0;
3496 }
3497
3498
3499 static void
3500 ipfw_readfile(int ac, char *av[])
3501 {
3502 #define MAX_ARGS 32
3503 #define WHITESP " \t\f\v\n\r"
3504 char buf[BUFSIZ];
3505 char *a, *p, *args[MAX_ARGS], *cmd = NULL;
3506 char linename[10];
3507 int i=0, lineno=0, qflag=0, pflag=0, status;
3508 FILE *f = NULL;
3509 pid_t preproc = 0;
3510 int c;
3511
3512 while ((c = getopt(ac, av, "D:U:p:q")) != -1)
3513 switch(c) {
3514 case 'D':
3515 if (!pflag)
3516 errx(EX_USAGE, "-D requires -p");
3517 if (i > MAX_ARGS - 2)
3518 errx(EX_USAGE,
3519 "too many -D or -U options");
3520 args[i++] = "-D";
3521 args[i++] = optarg;
3522 break;
3523
3524 case 'U':
3525 if (!pflag)
3526 errx(EX_USAGE, "-U requires -p");
3527 if (i > MAX_ARGS - 2)
3528 errx(EX_USAGE,
3529 "too many -D or -U options");
3530 args[i++] = "-U";
3531 args[i++] = optarg;
3532 break;
3533
3534 case 'p':
3535 pflag = 1;
3536 cmd = optarg;
3537 args[0] = cmd;
3538 i = 1;
3539 break;
3540
3541 case 'q':
3542 qflag = 1;
3543 break;
3544
3545 default:
3546 errx(EX_USAGE, "bad arguments, for usage"
3547 " summary ``ipfw''");
3548 }
3549
3550 av += optind;
3551 ac -= optind;
3552 if (ac != 1)
3553 errx(EX_USAGE, "extraneous filename arguments");
3554
3555 if ((f = fopen(av[0], "r")) == NULL)
3556 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
3557
3558 if (pflag) {
3559 /* pipe through preprocessor (cpp or m4) */
3560 int pipedes[2];
3561
3562 args[i] = 0;
3563
3564 if (pipe(pipedes) == -1)
3565 err(EX_OSERR, "cannot create pipe");
3566
3567 switch((preproc = fork())) {
3568 case -1:
3569 err(EX_OSERR, "cannot fork");
3570
3571 case 0:
3572 /* child */
3573 if (dup2(fileno(f), 0) == -1
3574 || dup2(pipedes[1], 1) == -1)
3575 err(EX_OSERR, "dup2()");
3576 fclose(f);
3577 close(pipedes[1]);
3578 close(pipedes[0]);
3579 execvp(cmd, args);
3580 err(EX_OSERR, "execvp(%s) failed", cmd);
3581
3582 default:
3583 /* parent */
3584 fclose(f);
3585 close(pipedes[1]);
3586 if ((f = fdopen(pipedes[0], "r")) == NULL) {
3587 int savederrno = errno;
3588
3589 kill(preproc, SIGTERM);
3590 errno = savederrno;
3591 err(EX_OSERR, "fdopen()");
3592 }
3593 }
3594 }
3595
3596 while (fgets(buf, BUFSIZ, f)) {
3597 lineno++;
3598 sprintf(linename, "Line %d", lineno);
3599 args[0] = linename;
3600
3601 if (*buf == '#')
3602 continue;
3603 if ((p = strchr(buf, '#')) != NULL)
3604 *p = '\0';
3605 i = 1;
3606 if (qflag)
3607 args[i++] = "-q";
3608 for (a = strtok(buf, WHITESP);
3609 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
3610 args[i] = a;
3611 if (i == (qflag? 2: 1))
3612 continue;
3613 if (i == MAX_ARGS)
3614 errx(EX_USAGE, "%s: too many arguments",
3615 linename);
3616 args[i] = NULL;
3617
3618 ipfw_main(i, args);
3619 }
3620 fclose(f);
3621 if (pflag) {
3622 if (waitpid(preproc, &status, 0) == -1)
3623 errx(EX_OSERR, "waitpid()");
3624 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
3625 errx(EX_UNAVAILABLE,
3626 "preprocessor exited with status %d",
3627 WEXITSTATUS(status));
3628 else if (WIFSIGNALED(status))
3629 errx(EX_UNAVAILABLE,
3630 "preprocessor exited with signal %d",
3631 WTERMSIG(status));
3632 }
3633 }
3634
3635 int
3636 main(int ac, char *av[])
3637 {
3638 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
3639 if (s < 0)
3640 err(EX_UNAVAILABLE, "socket");
3641
3642 /*
3643 * If the last argument is an absolute pathname, interpret it
3644 * as a file to be preprocessed.
3645 */
3646
3647 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
3648 ipfw_readfile(ac, av);
3649 else
3650 ipfw_main(ac, av);
3651 return EX_OK;
3652 }
DragonFly vkernel multiprocessor port