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<signal.h>: Adjust #if 0'd prototype.
[dragonfly.git] / sbin / ipfw / ipfw2.c
blob39ff869dca4aedc56eca54bc5105c2a0b6a8ec32
1 /*
2 * Copyright (c) 2002 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
5 *
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
8 *
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
11 *
12 * Redistribution in binary form may occur without any restrictions.
13 * Obviously, it would be nice if you gave credit where credit is due
14 * but requiring it would be too onerous.
15 *
16 * This software is provided ``AS IS'' without any warranties of any kind.
17 *
18 * NEW command line interface for IP firewall facility
19 *
20 * $FreeBSD: src/sbin/ipfw/ipfw2.c,v 1.4.2.13 2003/05/27 22:21:11 gshapiro Exp $
21 */
22
23 #include <sys/param.h>
24 #include <sys/mbuf.h>
25 #include <sys/socket.h>
26 #include <sys/sockio.h>
27 #include <sys/sysctl.h>
28 #include <sys/time.h>
29 #include <sys/wait.h>
30
31 #include <ctype.h>
32 #include <err.h>
33 #include <errno.h>
34 #include <grp.h>
35 #include <limits.h>
36 #include <netdb.h>
37 #include <pwd.h>
38 #include <signal.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <string.h>
43 #include <timeconv.h>
44 #include <unistd.h>
45 #include <sysexits.h>
46
47 #include <net/if.h>
48 #include <netinet/in.h>
49 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip_icmp.h>
52 #include <net/ipfw/ip_fw.h>
53 #include <net/route.h> /* def. of struct route */
54 #include <net/ethernet.h>
55 #include <net/dummynet/ip_dummynet.h>
56 #include <netinet/tcp.h>
57 #include <arpa/inet.h>
58
59 int s, /* main RAW socket */
60 do_resolv, /* Would try to resolve all */
61 do_acct, /* Show packet/byte count */
62 do_time, /* Show time stamps */
63 do_quiet, /* Be quiet in add and flush */
64 do_force, /* Don't ask for confirmation */
65 do_pipe, /* this cmd refers to a pipe */
66 do_table, /* this cmd referes to a table */
67 do_sort, /* field to sort results (0 = no) */
68 do_dynamic, /* display dynamic rules */
69 do_expired, /* display expired dynamic rules */
70 do_compact, /* show rules in compact mode */
71 show_sets, /* display rule sets */
72 verbose;
73
74 #define IP_MASK_ALL 0xffffffff
75
76 /*
77 * structure to hold flag names and associated values to be
78 * set in the appropriate masks.
79 * A NULL string terminates the array.
80 * Often, an element with 0 value contains an error string.
81 *
82 */
83 struct _s_x {
84 const char *s;
85 uint32_t x;
86 };
87
88 static struct _s_x f_tcpflags[] = {
89 { "syn", TH_SYN },
90 { "fin", TH_FIN },
91 { "ack", TH_ACK },
92 { "psh", TH_PUSH },
93 { "rst", TH_RST },
94 { "urg", TH_URG },
95 { "tcp flag", 0 },
96 { NULL, 0 }
97 };
98
99 static struct _s_x f_tcpopts[] = {
100 { "mss", IP_FW_TCPOPT_MSS },
101 { "maxseg", IP_FW_TCPOPT_MSS },
102 { "window", IP_FW_TCPOPT_WINDOW },
103 { "sack", IP_FW_TCPOPT_SACK },
104 { "ts", IP_FW_TCPOPT_TS },
105 { "timestamp", IP_FW_TCPOPT_TS },
106 { "cc", IP_FW_TCPOPT_CC },
107 { "tcp option", 0 },
108 { NULL, 0 }
109 };
110
111 /*
112 * IP options span the range 0 to 255 so we need to remap them
113 * (though in fact only the low 5 bits are significant).
114 */
115 static struct _s_x f_ipopts[] = {
116 { "ssrr", IP_FW_IPOPT_SSRR},
117 { "lsrr", IP_FW_IPOPT_LSRR},
118 { "rr", IP_FW_IPOPT_RR},
119 { "ts", IP_FW_IPOPT_TS},
120 { "ip option", 0 },
121 { NULL, 0 }
122 };
123
124 static struct _s_x f_iptos[] = {
125 { "lowdelay", IPTOS_LOWDELAY},
126 { "throughput", IPTOS_THROUGHPUT},
127 { "reliability", IPTOS_RELIABILITY},
128 { "mincost", IPTOS_MINCOST},
129 { "congestion", IPTOS_CE},
130 { "ecntransport", IPTOS_ECT},
131 { "ip tos option", 0},
132 { NULL, 0 }
133 };
134
135 static struct _s_x limit_masks[] = {
136 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
137 {"src-addr", DYN_SRC_ADDR},
138 {"src-port", DYN_SRC_PORT},
139 {"dst-addr", DYN_DST_ADDR},
140 {"dst-port", DYN_DST_PORT},
141 {NULL, 0}
142 };
143
144 /*
145 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
146 * This is only used in this code.
147 */
148 #define IPPROTO_ETHERTYPE 0x1000
149 static struct _s_x ether_types[] = {
150 /*
151 * Note, we cannot use "-:&/" in the names because they are field
152 * separators in the type specifications. Also, we use s = NULL as
153 * end-delimiter, because a type of 0 can be legal.
154 */
155 { "ip", 0x0800 },
156 { "ipv4", 0x0800 },
157 { "ipv6", 0x86dd },
158 { "arp", 0x0806 },
159 { "rarp", 0x8035 },
160 { "vlan", 0x8100 },
161 { "loop", 0x9000 },
162 { "trail", 0x1000 },
163 { "pppoe_disc", 0x8863 },
164 { "pppoe_sess", 0x8864 },
165 { "ipx_8022", 0x00E0 },
166 { "ipx_8023", 0x0000 },
167 { "ipx_ii", 0x8137 },
168 { "ipx_snap", 0x8137 },
169 { "ipx", 0x8137 },
170 { "ns", 0x0600 },
171 { NULL, 0 }
172 };
173
174 static void show_usage(void);
175
176 enum tokens {
177 TOK_NULL=0,
178
179 TOK_OR,
180 TOK_NOT,
181 TOK_STARTBRACE,
182 TOK_ENDBRACE,
183
184 TOK_ACCEPT,
185 TOK_COUNT,
186 TOK_DEFRAG,
187 TOK_PIPE,
188 TOK_QUEUE,
189 TOK_DIVERT,
190 TOK_TEE,
191 TOK_FORWARD,
192 TOK_SKIPTO,
193 TOK_DENY,
194 TOK_REJECT,
195 TOK_RESET,
196 TOK_UNREACH,
197 TOK_CHECKSTATE,
198
199 TOK_UID,
200 TOK_GID,
201 TOK_IN,
202 TOK_LIMIT,
203 TOK_KEEPSTATE,
204 TOK_REDIRECT,
205 TOK_LAYER2,
206 TOK_OUT,
207 TOK_XMIT,
208 TOK_RECV,
209 TOK_VIA,
210 TOK_FRAG,
211 TOK_IPFRAG,
212 TOK_IPOPTS,
213 TOK_IPLEN,
214 TOK_IPID,
215 TOK_IPPRECEDENCE,
216 TOK_IPTOS,
217 TOK_IPTTL,
218 TOK_IPVER,
219 TOK_ESTAB,
220 TOK_SETUP,
221 TOK_TCPFLAGS,
222 TOK_TCPOPTS,
223 TOK_TCPSEQ,
224 TOK_TCPACK,
225 TOK_TCPWIN,
226 TOK_ICMPCODES,
227 TOK_ICMPTYPES,
228 TOK_MAC,
229 TOK_MACTYPE,
230
231 TOK_PLR,
232 TOK_NOERROR,
233 TOK_BUCKETS,
234 TOK_DSTIP,
235 TOK_SRCIP,
236 TOK_DSTPORT,
237 TOK_SRCPORT,
238 TOK_ALL,
239 TOK_MASK,
240 TOK_BW,
241 TOK_DELAY,
242 TOK_RED,
243 TOK_GRED,
244 TOK_DROPTAIL,
245 TOK_PROTO,
246 TOK_WEIGHT,
247 };
248
249 struct _s_x dummynet_params[] = {
250 { "plr", TOK_PLR },
251 { "noerror", TOK_NOERROR },
252 { "buckets", TOK_BUCKETS },
253 { "dst-ip", TOK_DSTIP },
254 { "src-ip", TOK_SRCIP },
255 { "dst-port", TOK_DSTPORT },
256 { "src-port", TOK_SRCPORT },
257 { "proto", TOK_PROTO },
258 { "weight", TOK_WEIGHT },
259 { "all", TOK_ALL },
260 { "mask", TOK_MASK },
261 { "droptail", TOK_DROPTAIL },
262 { "red", TOK_RED },
263 { "gred", TOK_GRED },
264 { "bw", TOK_BW },
265 { "bandwidth", TOK_BW },
266 { "delay", TOK_DELAY },
267 { "pipe", TOK_PIPE },
268 { "queue", TOK_QUEUE },
269 { "dummynet-params", TOK_NULL },
270 { NULL, 0 }
271 };
272
273 struct _s_x rule_actions[] = {
274 { "accept", TOK_ACCEPT },
275 { "pass", TOK_ACCEPT },
276 { "allow", TOK_ACCEPT },
277 { "permit", TOK_ACCEPT },
278 { "count", TOK_COUNT },
279 { "pipe", TOK_PIPE },
280 { "queue", TOK_QUEUE },
281 { "divert", TOK_DIVERT },
282 { "tee", TOK_TEE },
283 { "fwd", TOK_FORWARD },
284 { "forward", TOK_FORWARD },
285 { "skipto", TOK_SKIPTO },
286 { "deny", TOK_DENY },
287 { "drop", TOK_DENY },
288 { "reject", TOK_REJECT },
289 { "reset", TOK_RESET },
290 { "unreach", TOK_UNREACH },
291 { "check-state", TOK_CHECKSTATE },
292 { "defrag", TOK_DEFRAG },
293 { NULL, TOK_NULL },
294 { NULL, 0 }
295 };
296
297 struct _s_x rule_options[] = {
298 { "uid", TOK_UID },
299 { "gid", TOK_GID },
300 { "in", TOK_IN },
301 { "limit", TOK_LIMIT },
302 { "keep-state", TOK_KEEPSTATE },
303 { "redirect", TOK_REDIRECT },
304 { "rdr", TOK_REDIRECT },
305 { "layer2", TOK_LAYER2 },
306 { "out", TOK_OUT },
307 { "xmit", TOK_XMIT },
308 { "recv", TOK_RECV },
309 { "via", TOK_VIA },
310 { "fragment", TOK_FRAG },
311 { "frag", TOK_FRAG },
312 { "ipfrag", TOK_IPFRAG },
313 { "ipoptions", TOK_IPOPTS },
314 { "ipopts", TOK_IPOPTS },
315 { "iplen", TOK_IPLEN },
316 { "ipid", TOK_IPID },
317 { "ipprecedence", TOK_IPPRECEDENCE },
318 { "iptos", TOK_IPTOS },
319 { "ipttl", TOK_IPTTL },
320 { "ipversion", TOK_IPVER },
321 { "ipver", TOK_IPVER },
322 { "estab", TOK_ESTAB },
323 { "established", TOK_ESTAB },
324 { "setup", TOK_SETUP },
325 { "tcpflags", TOK_TCPFLAGS },
326 { "tcpflgs", TOK_TCPFLAGS },
327 { "tcpoptions", TOK_TCPOPTS },
328 { "tcpopts", TOK_TCPOPTS },
329 { "tcpseq", TOK_TCPSEQ },
330 { "tcpack", TOK_TCPACK },
331 { "tcpwin", TOK_TCPWIN },
332 { "icmpcode", TOK_ICMPCODES },
333 { "icmpcodes", TOK_ICMPCODES },
334 { "icmptype", TOK_ICMPTYPES },
335 { "icmptypes", TOK_ICMPTYPES },
336 { "dst-ip", TOK_DSTIP },
337 { "src-ip", TOK_SRCIP },
338 { "dst-port", TOK_DSTPORT },
339 { "src-port", TOK_SRCPORT },
340 { "proto", TOK_PROTO },
341 { "MAC", TOK_MAC },
342 { "mac", TOK_MAC },
343 { "mac-type", TOK_MACTYPE },
344
345 { "not", TOK_NOT }, /* pseudo option */
346 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
347 { "or", TOK_OR }, /* pseudo option */
348 { "|", /* escape */ TOK_OR }, /* pseudo option */
349 { "{", TOK_STARTBRACE }, /* pseudo option */
350 { "(", TOK_STARTBRACE }, /* pseudo option */
351 { "}", TOK_ENDBRACE }, /* pseudo option */
352 { ")", TOK_ENDBRACE }, /* pseudo option */
353 { NULL, TOK_NULL },
354 { NULL, 0 }
355 };
356
357 /**
358 * match_token takes a table and a string, returns the value associated
359 * with the string (0 meaning an error in most cases)
360 */
361 static int
362 match_token(struct _s_x *table, char *string)
363 {
364 struct _s_x *pt;
365 int i = strlen(string);
366
367 for (pt = table ; i && pt->s != NULL ; pt++)
368 if ((int)strlen(pt->s) == i && !bcmp(string, pt->s, i))
369 return pt->x;
370 return -1;
371 };
372
373 static const char *
374 match_value(struct _s_x *p, u_int32_t value)
375 {
376 for (; p->s != NULL; p++)
377 if (p->x == value)
378 return p->s;
379 return NULL;
380 }
381
382 /*
383 * prints one port, symbolic or numeric
384 */
385 static void
386 print_port(int proto, u_int16_t port)
387 {
388
389 if (proto == IPPROTO_ETHERTYPE) {
390 const char *str;
391
392 if (do_resolv && (str = match_value(ether_types, port)) )
393 printf("%s", str);
394 else
395 printf("0x%04x", port);
396 } else {
397 struct servent *se = NULL;
398 if (do_resolv) {
399 struct protoent *pe = getprotobynumber(proto);
400
401 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
402 }
403 if (se)
404 printf("%s", se->s_name);
405 else
406 printf("%d", port);
407 }
408 }
409
410 /*
411 * print the values in a list of ports
412 * XXX todo: add support for mask.
413 */
414 static void
415 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
416 {
417 u_int16_t *p = cmd->ports;
418 int i;
419 const char *sep= " ";
420
421 if (cmd->o.len & F_NOT)
422 printf(" not");
423 if (opcode != 0)
424 printf ("%s", opcode == O_MAC_TYPE ? " mac-type" :
425 (opcode == O_IP_DSTPORT ? " dst-port" : " src-port"));
426 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
427 printf("%s", sep);
428 print_port(proto, p[0]);
429 if (p[0] != p[1]) {
430 printf("-");
431 print_port(proto, p[1]);
432 }
433 sep = ",";
434 }
435 }
436
437 /*
438 * Like strtol, but also translates service names into port numbers
439 * for some protocols.
440 * In particular:
441 * proto == -1 disables the protocol check;
442 * proto == IPPROTO_ETHERTYPE looks up an internal table
443 * proto == <some value in /etc/protocols> matches the values there.
444 * Returns *end == s in case the parameter is not found.
445 */
446 static int
447 strtoport(char *str, char **end, int base, int proto)
448 {
449 char *p, *buf;
450 char *s1;
451 int i;
452
453 *end = str; /* default - not found */
454 if (*str == '\0')
455 return 0; /* not found */
456
457 if (isdigit(*str))
458 return strtol(str, end, base);
459
460 /*
461 * find separator. '\\' escapes the next char.
462 */
463 for (s1 = str; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
464 if (*s1 == '\\' && s1[1] != '\0')
465 s1++;
466
467 buf = malloc(s1 - str + 1);
468 if (buf == NULL)
469 return 0;
470
471 /*
472 * copy into a buffer skipping backslashes
473 */
474 for (p = str, i = 0; p != s1 ; p++)
475 if ( *p != '\\')
476 buf[i++] = *p;
477 buf[i++] = '\0';
478
479 if (proto == IPPROTO_ETHERTYPE) {
480 i = match_token(ether_types, buf);
481 free(buf);
482 if (i != -1) { /* found */
483 *end = s1;
484 return i;
485 }
486 } else {
487 struct protoent *pe = NULL;
488 struct servent *se;
489
490 if (proto != 0)
491 pe = getprotobynumber(proto);
492 setservent(1);
493 se = getservbyname(buf, pe ? pe->p_name : NULL);
494 free(buf);
495 if (se != NULL) {
496 *end = s1;
497 return ntohs(se->s_port);
498 }
499 }
500 return 0; /* not found */
501 }
502
503 /*
504 * fill the body of the command with the list of port ranges.
505 * At the moment it only understands numeric ranges.
506 */
507 static int
508 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
509 {
510 u_int16_t *p = cmd->ports;
511 int i = 0;
512 char *str = av;
513
514 while (*str) {
515 u_int16_t a, b;
516
517 a = strtoport(av, &str, 0, proto);
518 if (str == av) /* no parameter */
519 break;
520 if (*str == '-') { /* a range */
521 av = str+1;
522 b = strtoport(av, &str, 0, proto);
523 if (str == av) /* no parameter */
524 break;
525 p[0] = a;
526 p[1] = b;
527 } else if (*str == ',' || *str == '\0' ) {
528 p[0] = p[1] = a;
529 } else { /* invalid separator */
530 errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
531 *str, av);
532 }
533 i++;
534 p += 2;
535 av = str+1;
536 }
537 if (i > 0) {
538 if (i+1 > F_LEN_MASK)
539 errx(EX_DATAERR, "too many ports/ranges\n");
540 cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
541 }
542 return i;
543 }
544
545 static struct _s_x icmpcodes[] = {
546 { "net", ICMP_UNREACH_NET },
547 { "host", ICMP_UNREACH_HOST },
548 { "protocol", ICMP_UNREACH_PROTOCOL },
549 { "port", ICMP_UNREACH_PORT },
550 { "needfrag", ICMP_UNREACH_NEEDFRAG },
551 { "srcfail", ICMP_UNREACH_SRCFAIL },
552 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
553 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
554 { "isolated", ICMP_UNREACH_ISOLATED },
555 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
556 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
557 { "tosnet", ICMP_UNREACH_TOSNET },
558 { "toshost", ICMP_UNREACH_TOSHOST },
559 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
560 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
561 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
562 { NULL, 0 }
563 };
564
565 static void
566 fill_reject_code(u_short *codep, char *str)
567 {
568 int val;
569 char *s1;
570
571 val = strtoul(str, &s1, 0);
572 if (s1 == str || *s1 != '\0' || val >= 0x100)
573 val = match_token(icmpcodes, str);
574 if (val < 0)
575 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
576 *codep = val;
577 return;
578 }
579
580 static void
581 print_reject_code(u_int16_t code)
582 {
583 const char *str = match_value(icmpcodes, code);
584
585 if (str != NULL)
586 printf("unreach %s", str);
587 else
588 printf("unreach %u", code);
589 }
590
591 /*
592 * Returns the number of bits set (from left) in a contiguous bitmask,
593 * or -1 if the mask is not contiguous.
594 * XXX this needs a proper fix.
595 * This effectively works on masks in big-endian (network) format.
596 * when compiled on little endian architectures.
597 *
598 * First bit is bit 7 of the first byte -- note, for MAC addresses,
599 * the first bit on the wire is bit 0 of the first byte.
600 * len is the max length in bits.
601 */
602 static int
603 contigmask(u_char *p, int len)
604 {
605 int i, n;
606 for (i=0; i<len ; i++)
607 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
608 break;
609 for (n=i+1; n < len; n++)
610 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
611 return -1; /* mask not contiguous */
612 return i;
613 }
614
615 /*
616 * print flags set/clear in the two bitmasks passed as parameters.
617 * There is a specialized check for f_tcpflags.
618 */
619 static void
620 print_flags(const char *name, ipfw_insn *cmd, struct _s_x *list)
621 {
622 const char *comma="";
623 int i;
624 u_char set = cmd->arg1 & 0xff;
625 u_char clear = (cmd->arg1 >> 8) & 0xff;
626
627 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
628 printf(" setup");
629 return;
630 }
631
632 printf(" %s ", name);
633 for (i=0; list[i].x != 0; i++) {
634 if (set & list[i].x) {
635 set &= ~list[i].x;
636 printf("%s%s", comma, list[i].s);
637 comma = ",";
638 }
639 if (clear & list[i].x) {
640 clear &= ~list[i].x;
641 printf("%s!%s", comma, list[i].s);
642 comma = ",";
643 }
644 }
645 }
646
647 /*
648 * Print the ip address contained in a command.
649 */
650 static void
651 print_ip(ipfw_insn_ip *cmd, const char *str)
652 {
653 struct hostent *he = NULL;
654 int mb;
655
656 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", str);
657
658 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
659 printf("me");
660 return;
661 }
662 if (cmd->o.opcode == O_IP_SRC_TABLE ||
663 cmd->o.opcode == O_IP_DST_TABLE) {
664 printf("<%u>", cmd->o.arg1);
665 return;
666 }
667 if (cmd->o.opcode == O_IP_SRC_IFIP ||
668 cmd->o.opcode == O_IP_DST_IFIP) {
669 printf("[%s%s]", ((ipfw_insn_ifip *)cmd)->ifname,
670 (cmd->o.arg1 & IPFW_IFIP_NET) ? ":net" : "");
671 return;
672 }
673 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
674 u_int32_t x, *d;
675 int i;
676 char comma = '{';
677
678 x = cmd->o.arg1 - 1;
679 x = htonl( ~x );
680 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
681 printf("%s/%d", inet_ntoa(cmd->addr),
682 contigmask((u_char *)&x, 32));
683 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
684 x &= 0xff; /* base */
685 d = (u_int32_t *)&(cmd->mask);
686 for (i=0; i < cmd->o.arg1; i++)
687 if (d[ i/32] & (1<<(i & 31))) {
688 printf("%c%d", comma, i+x);
689 comma = ',';
690 }
691 printf("}");
692 return;
693 }
694 if (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST)
695 mb = 32;
696 else
697 mb = contigmask((u_char *)&(cmd->mask.s_addr), 32);
698 if (mb == 32 && do_resolv)
699 he = gethostbyaddr(&(cmd->addr.s_addr), sizeof(u_long),
700 AF_INET);
701 if (he != NULL) /* resolved to name */
702 printf("%s", he->h_name);
703 else if (mb == 0) /* any */
704 printf("any");
705 else { /* numeric IP followed by some kind of mask */
706 printf("%s", inet_ntoa(cmd->addr));
707 if (mb < 0)
708 printf(":%s", inet_ntoa(cmd->mask));
709 else if (mb < 32)
710 printf("/%d", mb);
711 }
712 }
713
714 /*
715 * prints a MAC address/mask pair
716 */
717 static void
718 print_mac(u_char *addr, u_char *mask)
719 {
720 int l = contigmask(mask, 48);
721
722 if (l == 0)
723 printf(" any");
724 else {
725 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
726 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
727 if (l == -1)
728 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
729 mask[0], mask[1], mask[2],
730 mask[3], mask[4], mask[5]);
731 else if (l < 48)
732 printf("/%d", l);
733 }
734 }
735
736 static void
737 fill_icmp(enum ipfw_opcodes op, ipfw_insn_u32 *cmd, char *av)
738 {
739 u_int8_t type;
740 int idx_max = 0, idx;
741
742 /* 256 / 32, (max icmp types / 32 bits). */
743 for (idx = 0; idx < 8; ++idx)
744 cmd->d[idx] = 0;
745
746 while (*av) {
747 if (*av == ',')
748 av++;
749
750 type = strtoul(av, &av, 0);
751 if (*av != ',' && *av != '\0') {
752 errx(EX_DATAERR, "invalid ICMP %s",
753 op == O_ICMPTYPE ? "types" : "codes");
754 }
755
756 idx = type / 32;
757 cmd->d[idx] |= 1 << (type % 32);
758
759 if (idx > idx_max)
760 idx_max = idx;
761 }
762 cmd->o.opcode = op;
763 cmd->o.len |= (F_INSN_SIZE(ipfw_insn_u32) + idx_max);
764 }
765
766 static void
767 print_icmp(ipfw_insn_u32 *cmd)
768 {
769 int idx, idx_max;
770 char sep= ' ';
771
772 idx_max = F_LEN(&cmd->o) - F_INSN_SIZE(ipfw_insn);
773
774 if (cmd->o.opcode == O_ICMPTYPE)
775 printf(" icmptypes");
776 else
777 printf(" icmpcodes");
778 for (idx = 0; idx < idx_max; ++idx) {
779 uint32_t types = cmd->d[idx];
780
781 while (types != 0) {
782 int type_shift = ffs(types) - 1;
783
784 types &= ~(1 << type_shift);
785 printf("%c%d", sep, (idx * 32) + type_shift);
786 sep = ',';
787 }
788 }
789 }
790
791 /*
792 * show_ipfw() prints the body of an ipfw rule.
793 * Because the standard rule has at least proto src_ip dst_ip, we use
794 * a helper function to produce these entries if not provided explicitly.
795 * The first argument is the list of fields we have, the second is
796 * the list of fields we want to be printed.
797 *
798 * Special cases if we have provided a MAC header:
799 * + if the rule does not contain IP addresses/ports, do not print them;
800 * + if the rule does not contain an IP proto, print "all" instead of "ip";
801 *
802 * Once we have 'have_options', IP header fields are printed as options.
803 */
804 #define HAVE_PROTO 0x0001
805 #define HAVE_SRCIP 0x0002
806 #define HAVE_DSTIP 0x0004
807 #define HAVE_MAC 0x0008
808 #define HAVE_MACTYPE 0x0010
809 #define HAVE_OPTIONS 0x8000
810
811 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
812 static void
813 show_prerequisites(int *flags, int want, int cmd)
814 {
815 if ( (*flags & HAVE_IP) == HAVE_IP)
816 *flags |= HAVE_OPTIONS;
817
818 if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
819 cmd != O_MAC_TYPE) {
820 /*
821 * mac-type was optimized out by the compiler,
822 * restore it
823 */
824 printf(" any");
825 *flags |= HAVE_MACTYPE | HAVE_OPTIONS;
826 return;
827 }
828 if ( !(*flags & HAVE_OPTIONS)) {
829 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
830 printf(" ip");
831 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
832 printf(" from any");
833 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
834 printf(" to any");
835 }
836 *flags |= want;
837 }
838
839 static void
840 show_ipfw(struct ipfw_ioc_rule *rule, int pcwidth, int bcwidth)
841 {
842 static int twidth = 0;
843 int l;
844 ipfw_insn *cmd;
845 int proto = 0; /* default */
846 int flags = 0; /* prerequisites */
847 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
848 int or_block = 0; /* we are in an or block */
849
850 u_int32_t set_disable = rule->set_disable;
851
852 if (set_disable & (1 << rule->set)) { /* disabled */
853 if (!show_sets)
854 return;
855 else
856 printf("# DISABLED ");
857 }
858 printf("%05u ", rule->rulenum);
859
860 if (do_acct)
861 printf("%*ju %*ju ", pcwidth, (uintmax_t)rule->pcnt, bcwidth,
862 (uintmax_t)rule->bcnt);
863
864 if (do_time) {
865 char timestr[30];
866
867 if (twidth == 0) {
868 time_t t0 = 0;
869
870 strcpy(timestr, ctime((time_t *)&t0));
871 *strchr(timestr, '\n') = '\0';
872 twidth = strlen(timestr);
873 }
874 if (rule->timestamp) {
875 time_t t = _long_to_time(rule->timestamp);
876
877 strcpy(timestr, ctime(&t));
878 *strchr(timestr, '\n') = '\0';
879 printf("%s ", timestr);
880 } else {
881 printf("%*s ", twidth, " ");
882 }
883 }
884
885 if (show_sets)
886 printf("set %d ", rule->set);
887
888 /*
889 * print the optional "match probability"
890 */
891 if (rule->cmd_len > 0) {
892 cmd = rule->cmd ;
893 if (cmd->opcode == O_PROB) {
894 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
895 double d = 1.0 * p->d[0];
896
897 d = (d / 0x7fffffff);
898 printf("prob %f ", d);
899 }
900 }
901
902 /*
903 * first print actions
904 */
905 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
906 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
907 switch(cmd->opcode) {
908 case O_CHECK_STATE:
909 printf("check-state");
910 flags = HAVE_IP; /* avoid printing anything else */
911 break;
912
913 case O_ACCEPT:
914 printf("allow");
915 break;
916
917 case O_COUNT:
918 printf("count");
919 break;
920
921 case O_DEFRAG:
922 printf("defrag");
923 break;
924
925 case O_DENY:
926 printf("deny");
927 break;
928
929 case O_REJECT:
930 if (cmd->arg1 == ICMP_REJECT_RST)
931 printf("reset");
932 else if (cmd->arg1 == ICMP_UNREACH_HOST)
933 printf("reject");
934 else
935 print_reject_code(cmd->arg1);
936 break;
937
938 case O_SKIPTO:
939 printf("skipto %u", cmd->arg1);
940 break;
941
942 case O_PIPE:
943 printf("pipe %u", cmd->arg1);
944 break;
945
946 case O_QUEUE:
947 printf("queue %u", cmd->arg1);
948 break;
949
950 case O_DIVERT:
951 printf("divert %u", cmd->arg1);
952 break;
953
954 case O_TEE:
955 printf("tee %u", cmd->arg1);
956 break;
957
958 case O_FORWARD_IP:
959 {
960 ipfw_insn_sa *sa = (ipfw_insn_sa *)cmd;
961
962 printf("fwd %s", inet_ntoa(sa->sa.sin_addr));
963 if (sa->sa.sin_port)
964 printf(",%d", sa->sa.sin_port);
965 }
966 break;
967
968 case O_LOG: /* O_LOG is printed last */
969 logptr = (ipfw_insn_log *)cmd;
970 break;
971
972 default:
973 printf("** unrecognized action %d len %d",
974 cmd->opcode, cmd->len);
975 }
976 }
977 if (logptr) {
978 if (logptr->max_log > 0)
979 printf(" log logamount %d", logptr->max_log);
980 else
981 printf(" log");
982 }
983
984 /*
985 * then print the body.
986 */
987 if (rule->usr_flags & IPFW_USR_F_NORULE) {
988 /* empty rules before options */
989 if (!do_compact)
990 printf(" ip from any to any");
991 flags |= HAVE_IP | HAVE_OPTIONS;
992 }
993
994 for (l = rule->act_ofs, cmd = rule->cmd ;
995 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
996 /* useful alias */
997 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
998
999 show_prerequisites(&flags, 0, cmd->opcode);
1000
1001 switch(cmd->opcode) {
1002 case O_PROB:
1003 break; /* done already */
1004
1005 case O_PROBE_STATE:
1006 break; /* no need to print anything here */
1007
1008 case O_MACADDR2: {
1009 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1010
1011 if ((cmd->len & F_OR) && !or_block)
1012 printf(" {");
1013 if (cmd->len & F_NOT)
1014 printf(" not");
1015 printf(" MAC");
1016 flags |= HAVE_MAC;
1017 print_mac( m->addr, m->mask);
1018 print_mac( m->addr + 6, m->mask + 6);
1019 }
1020 break;
1021
1022 case O_MAC_TYPE:
1023 if ((cmd->len & F_OR) && !or_block)
1024 printf(" {");
1025 print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
1026 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1027 flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
1028 break;
1029
1030 case O_IP_SRC:
1031 case O_IP_SRC_MASK:
1032 case O_IP_SRC_ME:
1033 case O_IP_SRC_SET:
1034 case O_IP_SRC_TABLE:
1035 case O_IP_SRC_IFIP:
1036 show_prerequisites(&flags, HAVE_PROTO, 0);
1037 if (!(flags & HAVE_SRCIP))
1038 printf(" from");
1039 if ((cmd->len & F_OR) && !or_block)
1040 printf(" {");
1041 print_ip((ipfw_insn_ip *)cmd,
1042 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1043 flags |= HAVE_SRCIP;
1044 break;
1045
1046 case O_IP_DST:
1047 case O_IP_DST_MASK:
1048 case O_IP_DST_ME:
1049 case O_IP_DST_SET:
1050 case O_IP_DST_TABLE:
1051 case O_IP_DST_IFIP:
1052 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1053 if (!(flags & HAVE_DSTIP))
1054 printf(" to");
1055 if ((cmd->len & F_OR) && !or_block)
1056 printf(" {");
1057 print_ip((ipfw_insn_ip *)cmd,
1058 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1059 flags |= HAVE_DSTIP;
1060 break;
1061
1062 case O_IP_DSTPORT:
1063 show_prerequisites(&flags, HAVE_IP, 0);
1064 /* FALLTHROUGH */
1065 case O_IP_SRCPORT:
1066 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1067 if ((cmd->len & F_OR) && !or_block)
1068 printf(" {");
1069 print_newports((ipfw_insn_u16 *)cmd, proto,
1070 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1071 break;
1072
1073 case O_PROTO: {
1074 struct protoent *pe;
1075
1076 if ((cmd->len & F_OR) && !or_block)
1077 printf(" {");
1078 if (cmd->len & F_NOT)
1079 printf(" not");
1080 proto = cmd->arg1;
1081 pe = getprotobynumber(cmd->arg1);
1082 if (flags & HAVE_OPTIONS)
1083 printf(" proto");
1084 if (pe)
1085 printf(" %s", pe->p_name);
1086 else
1087 printf(" %u", cmd->arg1);
1088 }
1089 flags |= HAVE_PROTO;
1090 break;
1091
1092 default: /*options ... */
1093 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1094 if ((cmd->len & F_OR) && !or_block)
1095 printf(" {");
1096 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1097 printf(" not");
1098 switch(cmd->opcode) {
1099 case O_FRAG:
1100 printf(" frag");
1101 break;
1102
1103 case O_IPFRAG:
1104 printf(" ipfrag");
1105 break;
1106
1107 case O_IN:
1108 printf(cmd->len & F_NOT ? " out" : " in");
1109 break;
1110
1111 case O_LAYER2:
1112 printf(" layer2");
1113 break;
1114 case O_XMIT:
1115 case O_RECV:
1116 case O_VIA: {
1117 const char *dir;
1118 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1119
1120 if (cmd->opcode == O_XMIT)
1121 dir = "xmit";
1122 else if (cmd->opcode == O_RECV)
1123 dir = "recv";
1124 else if (cmd->opcode == O_VIA)
1125 dir = "via";
1126 else
1127 dir = "?huh?";
1128 if (cmdif->name[0] == '\0')
1129 printf(" %s %s", dir,
1130 inet_ntoa(cmdif->p.ip));
1131 printf(" %s %s", dir, cmdif->name);
1132 }
1133 break;
1134
1135 case O_IPID:
1136 printf(" ipid %u", cmd->arg1 );
1137 break;
1138
1139 case O_IPTTL:
1140 printf(" ipttl %u", cmd->arg1 );
1141 break;
1142
1143 case O_IPVER:
1144 printf(" ipver %u", cmd->arg1 );
1145 break;
1146
1147 case O_IPPRECEDENCE:
1148 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1149 break;
1150
1151 case O_IPLEN:
1152 printf(" iplen %u", cmd->arg1 );
1153 break;
1154
1155 case O_IPOPT:
1156 print_flags("ipoptions", cmd, f_ipopts);
1157 break;
1158
1159 case O_IPTOS:
1160 print_flags("iptos", cmd, f_iptos);
1161 break;
1162
1163 case O_ICMPCODE:
1164 case O_ICMPTYPE:
1165 print_icmp((ipfw_insn_u32 *)cmd);
1166 break;
1167
1168 case O_ESTAB:
1169 printf(" established");
1170 break;
1171
1172 case O_TCPFLAGS:
1173 print_flags("tcpflags", cmd, f_tcpflags);
1174 break;
1175
1176 case O_TCPOPTS:
1177 print_flags("tcpoptions", cmd, f_tcpopts);
1178 break;
1179
1180 case O_TCPWIN:
1181 printf(" tcpwin %d", ntohs(cmd->arg1));
1182 break;
1183
1184 case O_TCPACK:
1185 printf(" tcpack %u", ntohl(cmd32->d[0]));
1186 break;
1187
1188 case O_TCPSEQ:
1189 printf(" tcpseq %u", ntohl(cmd32->d[0]));
1190 break;
1191
1192 case O_UID:
1193 {
1194 struct passwd *pwd = getpwuid(cmd32->d[0]);
1195
1196 if (pwd)
1197 printf(" uid %s", pwd->pw_name);
1198 else
1199 printf(" uid %u", cmd32->d[0]);
1200 }
1201 break;
1202
1203 case O_GID:
1204 {
1205 struct group *grp = getgrgid(cmd32->d[0]);
1206
1207 if (grp)
1208 printf(" gid %s", grp->gr_name);
1209 else
1210 printf(" gid %u", cmd32->d[0]);
1211 }
1212 break;
1213
1214 case O_KEEP_STATE:
1215 printf(" keep-state");
1216 break;
1217
1218 case O_REDIRECT:
1219 {
1220 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd;
1221
1222 printf(" rdr %s", inet_ntoa(c->addr));
1223 if (c->port != 0)
1224 printf(",%u", ntohs(c->port));
1225 break;
1226 }
1227
1228 case O_LIMIT:
1229 {
1230 struct _s_x *p = limit_masks;
1231 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1232 u_int8_t x = c->limit_mask;
1233 const char *comma = " ";
1234
1235 printf(" limit");
1236 for ( ; p->x != 0 ; p++)
1237 if ((x & p->x) == p->x) {
1238 x &= ~p->x;
1239 printf("%s%s", comma, p->s);
1240 comma = ",";
1241 }
1242 printf(" %d", c->conn_limit);
1243 }
1244 break;
1245
1246 default:
1247 printf(" [opcode %d len %d]",
1248 cmd->opcode, cmd->len);
1249 }
1250 }
1251 if (cmd->len & F_OR) {
1252 printf(" or");
1253 or_block = 1;
1254 } else if (or_block) {
1255 printf(" }");
1256 or_block = 0;
1257 }
1258 }
1259 show_prerequisites(&flags, HAVE_IP, 0);
1260
1261 printf("\n");
1262 }
1263
1264 static void
1265 show_dyn_ipfw(struct ipfw_ioc_state *d, int pcwidth, int bcwidth)
1266 {
1267 struct protoent *pe;
1268 struct in_addr a;
1269
1270 if (!do_expired) {
1271 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1272 return;
1273 }
1274
1275 printf("%05u %*ju %*ju (%ds)", d->rulenum, pcwidth, (uintmax_t)d->pcnt,
1276 bcwidth, (uintmax_t)d->bcnt, d->expire);
1277 switch (d->dyn_type) {
1278 case O_LIMIT_PARENT:
1279 printf(" PARENT %d", d->count);
1280 break;
1281 case O_LIMIT:
1282 printf(" LIMIT");
1283 break;
1284 case O_KEEP_STATE: /* bidir, no mask */
1285 printf(" STATE");
1286 break;
1287 case O_REDIRECT:
1288 printf(" REDIRECT");
1289 break;
1290 }
1291
1292 if ((pe = getprotobynumber(d->id.u.ip.proto)) != NULL)
1293 printf(" %s", pe->p_name);
1294 else
1295 printf(" proto %u", d->id.u.ip.proto);
1296
1297 a.s_addr = htonl(d->id.u.ip.src_ip);
1298 printf(" %s %d", inet_ntoa(a), d->id.u.ip.src_port);
1299
1300 a.s_addr = htonl(d->id.u.ip.dst_ip);
1301 printf(" <-> %s %d", inet_ntoa(a), d->id.u.ip.dst_port);
1302
1303 if (d->dyn_type == O_REDIRECT) {
1304 struct in_addr xlat_addr;
1305
1306 xlat_addr.s_addr = htonl(d->xlat_addr);
1307 printf(" => %s %d", inet_ntoa(xlat_addr), d->xlat_port);
1308 }
1309 printf("\n");
1310 }
1311
1312 static int
1313 sort_q(const void *pa, const void *pb)
1314 {
1315 int rev = (do_sort < 0);
1316 int field = rev ? -do_sort : do_sort;
1317 long long res = 0;
1318 const struct dn_ioc_flowqueue *a = pa;
1319 const struct dn_ioc_flowqueue *b = pb;
1320
1321 switch (field) {
1322 case 1: /* pkts */
1323 res = a->len - b->len;
1324 break;
1325 case 2: /* bytes */
1326 res = a->len_bytes - b->len_bytes;
1327 break;
1328
1329 case 3: /* tot pkts */
1330 res = a->tot_pkts - b->tot_pkts;
1331 break;
1332
1333 case 4: /* tot bytes */
1334 res = a->tot_bytes - b->tot_bytes;
1335 break;
1336 }
1337 if (res < 0)
1338 res = -1;
1339 if (res > 0)
1340 res = 1;
1341 return (int)(rev ? res : -res);
1342 }
1343
1344 static void
1345 list_queues(struct dn_ioc_flowset *fs, struct dn_ioc_flowqueue *q)
1346 {
1347 int l;
1348
1349 printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
1350 fs->flow_mask.u.ip.proto,
1351 fs->flow_mask.u.ip.src_ip, fs->flow_mask.u.ip.src_port,
1352 fs->flow_mask.u.ip.dst_ip, fs->flow_mask.u.ip.dst_port);
1353 if (fs->rq_elements == 0)
1354 return;
1355
1356 printf("BKT Prot ___Source IP/port____ "
1357 "____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
1358 if (do_sort != 0)
1359 heapsort(q, fs->rq_elements, sizeof(*q), sort_q);
1360 for (l = 0; l < fs->rq_elements; l++) {
1361 struct in_addr ina;
1362 struct protoent *pe;
1363
1364 ina.s_addr = htonl(q[l].id.u.ip.src_ip);
1365 printf("%3d ", q[l].hash_slot);
1366 pe = getprotobynumber(q[l].id.u.ip.proto);
1367 if (pe)
1368 printf("%-4s ", pe->p_name);
1369 else
1370 printf("%4u ", q[l].id.u.ip.proto);
1371 printf("%15s/%-5d ",
1372 inet_ntoa(ina), q[l].id.u.ip.src_port);
1373 ina.s_addr = htonl(q[l].id.u.ip.dst_ip);
1374 printf("%15s/%-5d ",
1375 inet_ntoa(ina), q[l].id.u.ip.dst_port);
1376 printf("%4ju %8ju %2u %4u %3u\n",
1377 (uintmax_t)q[l].tot_pkts, (uintmax_t)q[l].tot_bytes,
1378 q[l].len, q[l].len_bytes, q[l].drops);
1379 if (verbose)
1380 printf(" S %20ju F %20ju\n",
1381 (uintmax_t)q[l].S, (uintmax_t)q[l].F);
1382 }
1383 }
1384
1385 static void
1386 print_flowset_parms(struct dn_ioc_flowset *fs, char *prefix)
1387 {
1388 int l;
1389 char qs[30];
1390 char plr[30];
1391 char red[90]; /* Display RED parameters */
1392
1393 l = fs->qsize;
1394 if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
1395 if (l >= 8192)
1396 sprintf(qs, "%d KB", l / 1024);
1397 else
1398 sprintf(qs, "%d B", l);
1399 } else
1400 sprintf(qs, "%3d sl.", l);
1401 if (fs->plr)
1402 sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
1403 else
1404 plr[0] = '\0';
1405 if (fs->flags_fs & DN_IS_RED) /* RED parameters */
1406 sprintf(red,
1407 "\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
1408 (fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
1409 1.0 * fs->w_q / (double)(1 << SCALE_RED),
1410 SCALE_VAL(fs->min_th),
1411 SCALE_VAL(fs->max_th),
1412 1.0 * fs->max_p / (double)(1 << SCALE_RED));
1413 else
1414 sprintf(red, "droptail");
1415
1416 printf("%s %s%s %d queues (%d buckets) %s\n",
1417 prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
1418 }
1419
1420 static void
1421 list_pipes(void *data, int nbytes, int ac, char *av[])
1422 {
1423 u_long rulenum;
1424 void *next = data;
1425 struct dn_ioc_pipe *p = (struct dn_ioc_pipe *)data;
1426 struct dn_ioc_flowset *fs;
1427 struct dn_ioc_flowqueue *q;
1428 int l;
1429
1430 if (ac > 0)
1431 rulenum = strtoul(*av++, NULL, 10);
1432 else
1433 rulenum = 0;
1434 for (; nbytes >= (int)sizeof(*p); p = (struct dn_ioc_pipe *)next) {
1435 double b = p->bandwidth;
1436 char buf[30];
1437 char prefix[80];
1438
1439 if (p->fs.fs_type != DN_IS_PIPE)
1440 break; /* done with pipes, now queues */
1441
1442 /*
1443 * compute length, as pipe have variable size
1444 */
1445 l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
1446 next = (uint8_t *)p + l;
1447 nbytes -= l;
1448
1449 if (rulenum != 0 && rulenum != (u_long)p->pipe_nr)
1450 continue;
1451
1452 /*
1453 * Print rate
1454 */
1455 if (b == 0)
1456 sprintf(buf, "unlimited");
1457 else if (b >= 1000000)
1458 sprintf(buf, "%7.3f Mbit/s", b/1000000);
1459 else if (b >= 1000)
1460 sprintf(buf, "%7.3f Kbit/s", b/1000);
1461 else
1462 sprintf(buf, "%7.3f bit/s ", b);
1463
1464 sprintf(prefix, "%05d: %s %4d ms ",
1465 p->pipe_nr, buf, p->delay);
1466 print_flowset_parms(&p->fs, prefix);
1467 if (verbose)
1468 printf(" V %20ju\n", (uintmax_t)p->V >> MY_M);
1469
1470 q = (struct dn_ioc_flowqueue *)(p+1);
1471 list_queues(&p->fs, q);
1472 }
1473 for (fs = next; nbytes >= (int)sizeof(*fs); fs = next) {
1474 char prefix[80];
1475
1476 if (fs->fs_type != DN_IS_QUEUE)
1477 break;
1478 l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
1479 next = (uint8_t *)fs + l;
1480 nbytes -= l;
1481 q = (struct dn_ioc_flowqueue *)(fs+1);
1482 sprintf(prefix, "q%05d: weight %d pipe %d ",
1483 fs->fs_nr, fs->weight, fs->parent_nr);
1484 print_flowset_parms(fs, prefix);
1485 list_queues(fs, q);
1486 }
1487 }
1488
1489 /*
1490 * This one handles all set-related commands
1491 * ipfw set { show | enable | disable }
1492 * ipfw set swap X Y
1493 * ipfw set move X to Y
1494 * ipfw set move rule X to Y
1495 */
1496 static void
1497 sets_handler(int ac, char *av[])
1498 {
1499 u_int32_t set_disable, masks[2];
1500 int i, nbytes;
1501 u_int16_t rulenum;
1502 u_int8_t cmd, new_set;
1503
1504 ac--;
1505 av++;
1506
1507 if (!ac)
1508 errx(EX_USAGE, "set needs command");
1509 if (!strncmp(*av, "show", strlen(*av)) ) {
1510 void *data;
1511 const char *msg;
1512
1513 nbytes = sizeof(struct ipfw_ioc_rule);
1514 if ((data = malloc(nbytes)) == NULL)
1515 err(EX_OSERR, "malloc");
1516 if (getsockopt(s, IPPROTO_IP, IP_FW_GET, data, &nbytes) < 0)
1517 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1518 set_disable = ((struct ipfw_ioc_rule *)data)->set_disable;
1519
1520 for (i = 0, msg = "disable" ; i < 31; i++)
1521 if ( (set_disable & (1<<i))) {
1522 printf("%s %d", msg, i);
1523 msg = "";
1524 }
1525 msg = (set_disable) ? " enable" : "enable";
1526 for (i = 0; i < 31; i++)
1527 if ( !(set_disable & (1<<i))) {
1528 printf("%s %d", msg, i);
1529 msg = "";
1530 }
1531 printf("\n");
1532 } else if (!strncmp(*av, "swap", strlen(*av))) {
1533 ac--; av++;
1534 if (ac != 2)
1535 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1536 rulenum = atoi(av[0]);
1537 new_set = atoi(av[1]);
1538 if (!isdigit(*(av[0])) || rulenum > 30)
1539 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1540 if (!isdigit(*(av[1])) || new_set > 30)
1541 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1542 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1543 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1544 masks, sizeof(u_int32_t));
1545 } else if (!strncmp(*av, "move", strlen(*av))) {
1546 ac--; av++;
1547 if (ac && !strncmp(*av, "rule", strlen(*av))) {
1548 cmd = 2;
1549 ac--; av++;
1550 } else
1551 cmd = 3;
1552 if (ac != 3 || strncmp(av[1], "to", strlen(*av)))
1553 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1554 rulenum = atoi(av[0]);
1555 new_set = atoi(av[2]);
1556 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > 30) ||
1557 (cmd == 2 && rulenum == 65535) )
1558 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1559 if (!isdigit(*(av[2])) || new_set > 30)
1560 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1561 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1562 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL,
1563 masks, sizeof(u_int32_t));
1564 } else if (!strncmp(*av, "disable", strlen(*av)) ||
1565 !strncmp(*av, "enable", strlen(*av)) ) {
1566 int which = !strncmp(*av, "enable", strlen(*av)) ? 1 : 0;
1567
1568 ac--; av++;
1569 masks[0] = masks[1] = 0;
1570
1571 while (ac) {
1572 if (isdigit(**av)) {
1573 i = atoi(*av);
1574 if (i < 0 || i > 30)
1575 errx(EX_DATAERR,
1576 "invalid set number %d\n", i);
1577 masks[which] |= (1<<i);
1578 } else if (!strncmp(*av, "disable", strlen(*av)))
1579 which = 0;
1580 else if (!strncmp(*av, "enable", strlen(*av)))
1581 which = 1;
1582 else
1583 errx(EX_DATAERR,
1584 "invalid set command %s\n", *av);
1585 av++; ac--;
1586 }
1587 if ( (masks[0] & masks[1]) != 0 )
1588 errx(EX_DATAERR,
1589 "cannot enable and disable the same set\n");
1590
1591 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, masks, sizeof(masks));
1592 if (i)
1593 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1594 } else
1595 errx(EX_USAGE, "invalid set command %s\n", *av);
1596 }
1597
1598 static void
1599 sysctl_handler(int ac, char *av[], int which)
1600 {
1601 ac--;
1602 av++;
1603
1604 if (*av == NULL) {
1605 warnx("missing keyword to enable/disable\n");
1606 } else if (strncmp(*av, "firewall", strlen(*av)) == 0) {
1607 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1608 &which, sizeof(which));
1609 } else if (strncmp(*av, "one_pass", strlen(*av)) == 0) {
1610 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1611 &which, sizeof(which));
1612 } else if (strncmp(*av, "debug", strlen(*av)) == 0) {
1613 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1614 &which, sizeof(which));
1615 } else if (strncmp(*av, "verbose", strlen(*av)) == 0) {
1616 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1617 &which, sizeof(which));
1618 } else if (strncmp(*av, "dyn_keepalive", strlen(*av)) == 0) {
1619 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1620 &which, sizeof(which));
1621 } else {
1622 warnx("unrecognize enable/disable keyword: %s\n", *av);
1623 }
1624 }
1625
1626 static void
1627 list(int ac, char *av[])
1628 {
1629 struct ipfw_ioc_rule *r;
1630 struct ipfw_ioc_state *dynrules, *d;
1631
1632 void *data = NULL;
1633 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1634 int exitval = EX_OK;
1635 int lac;
1636 char **lav;
1637 u_long rnum;
1638 char *endptr;
1639 int seen = 0;
1640
1641 const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1642 int nalloc = 1024; /* start somewhere... */
1643
1644 ac--;
1645 av++;
1646
1647 /* get rules or pipes from kernel, resizing array as necessary */
1648 nbytes = nalloc;
1649
1650 while (nbytes >= nalloc) {
1651 nalloc = nalloc * 2 + 200;
1652 nbytes = nalloc;
1653 if ((data = realloc(data, nbytes)) == NULL)
1654 err(EX_OSERR, "realloc");
1655 if (getsockopt(s, IPPROTO_IP, ocmd, data, &nbytes) < 0)
1656 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1657 do_pipe ? "DUMMYNET" : "FW");
1658 }
1659
1660 if (do_pipe) {
1661 list_pipes(data, nbytes, ac, av);
1662 goto done;
1663 }
1664
1665 /*
1666 * Count static rules.
1667 */
1668 r = data;
1669 nstat = r->static_count;
1670
1671 /*
1672 * Count dynamic rules. This is easier as they have
1673 * fixed size.
1674 */
1675 dynrules = (struct ipfw_ioc_state *)((uint8_t *)r + r->static_len);
1676 ndyn = (nbytes - r->static_len) / sizeof(*dynrules);
1677
1678 /* if showing stats, figure out column widths ahead of time */
1679 bcwidth = pcwidth = 0;
1680 if (do_acct) {
1681 for (n = 0, r = data; n < nstat; n++,
1682 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1683 /* packet counter */
1684 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->pcnt);
1685 if (width > pcwidth)
1686 pcwidth = width;
1687
1688 /* byte counter */
1689 width = snprintf(NULL, 0, "%ju", (uintmax_t)r->bcnt);
1690 if (width > bcwidth)
1691 bcwidth = width;
1692 }
1693 }
1694 if (do_dynamic && ndyn) {
1695 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1696 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->pcnt);
1697 if (width > pcwidth)
1698 pcwidth = width;
1699
1700 width = snprintf(NULL, 0, "%ju", (uintmax_t)d->bcnt);
1701 if (width > bcwidth)
1702 bcwidth = width;
1703 }
1704 }
1705 /* if no rule numbers were specified, list all rules */
1706 if (ac == 0) {
1707 for (n = 0, r = data; n < nstat; n++,
1708 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r)))
1709 show_ipfw(r, pcwidth, bcwidth);
1710
1711 if (do_dynamic && ndyn) {
1712 printf("## Dynamic rules (%d):\n", ndyn);
1713 for (n = 0, d = dynrules; n < ndyn; n++, d++)
1714 show_dyn_ipfw(d, pcwidth, bcwidth);
1715 }
1716 goto done;
1717 }
1718
1719 /* display specific rules requested on command line */
1720
1721 for (lac = ac, lav = av; lac != 0; lac--) {
1722 /* convert command line rule # */
1723 rnum = strtoul(*lav++, &endptr, 10);
1724 if (*endptr) {
1725 exitval = EX_USAGE;
1726 warnx("invalid rule number: %s", *(lav - 1));
1727 continue;
1728 }
1729 for (n = seen = 0, r = data; n < nstat; n++,
1730 r = (struct ipfw_ioc_rule *)((uint8_t *)r + IOC_RULESIZE(r))) {
1731 if (r->rulenum > rnum)
1732 break;
1733 if (r->rulenum == rnum) {
1734 show_ipfw(r, pcwidth, bcwidth);
1735 seen = 1;
1736 }
1737 }
1738 if (!seen) {
1739 /* give precedence to other error(s) */
1740 if (exitval == EX_OK)
1741 exitval = EX_UNAVAILABLE;
1742 warnx("rule %lu does not exist", rnum);
1743 }
1744 }
1745
1746 if (do_dynamic && ndyn) {
1747 printf("## Dynamic rules:\n");
1748 for (lac = ac, lav = av; lac != 0; lac--) {
1749 rnum = strtoul(*lav++, &endptr, 10);
1750 if (*endptr)
1751 /* already warned */
1752 continue;
1753 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1754 if (d->rulenum > rnum)
1755 break;
1756 if (d->rulenum == rnum)
1757 show_dyn_ipfw(d, pcwidth, bcwidth);
1758 }
1759 }
1760 }
1761
1762 ac = 0;
1763
1764 done:
1765 free(data);
1766
1767 if (exitval != EX_OK)
1768 exit(exitval);
1769 }
1770
1771 static void
1772 show_usage(void)
1773 {
1774 fprintf(stderr, "usage: ipfw [options]\n"
1775 " add [number] rule\n"
1776 " pipe number config [pipeconfig]\n"
1777 " queue number config [queueconfig]\n"
1778 " [pipe] flush\n"
1779 " [pipe] delete number ...\n"
1780 " [pipe] {list|show} [number ...]\n"
1781 " {zero|resetlog} [number ...]\n"
1782 "do \"ipfw -h\" or see ipfw manpage for details\n"
1783 );
1784
1785 exit(EX_USAGE);
1786 }
1787
1788 static void
1789 help(void)
1790 {
1791
1792 fprintf(stderr, "ipfw syntax summary:\n"
1793 "ipfw add [N] [prob {0..1}] ACTION [log [logamount N]] ADDR OPTIONS\n"
1794 "ipfw {pipe|queue} N config BODY\n"
1795 "ipfw [pipe] {zero|delete|show} [N{,N}]\n"
1796 "\n"
1797 "RULE: [1..] [PROB] BODY\n"
1798 "RULENUM: INTEGER(1..65534)\n"
1799 "PROB: prob REAL(0..1)\n"
1800 "BODY: check-state [LOG] (no body) |\n"
1801 " ACTION [LOG] MATCH_ADDR [OPTION_LIST]\n"
1802 "ACTION: check-state | allow | count | deny | reject | skipto N |\n"
1803 " {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
1804 "ADDR: [ MAC dst src ether_type ] \n"
1805 " [ from IPLIST [ PORT ] to IPLIST [ PORTLIST ] ]\n"
1806 "IPLIST: IPADDR | ( IPADDR or ... or IPADDR )\n"
1807 "IPADDR: [not] { any | me | ip | ip/bits | ip:mask | ip/bits{x,y,z} }\n"
1808 "OPTION_LIST: OPTION [,OPTION_LIST]\n"
1809 );
1810 exit(0);
1811 }
1812
1813
1814 static int
1815 lookup_host (char *host, struct in_addr *ipaddr)
1816 {
1817 struct hostent *he;
1818
1819 if (!inet_aton(host, ipaddr)) {
1820 if ((he = gethostbyname(host)) == NULL)
1821 return(-1);
1822 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1823 }
1824 return(0);
1825 }
1826
1827 /*
1828 * fills the addr and mask fields in the instruction as appropriate from av.
1829 * Update length as appropriate.
1830 * The following formats are allowed:
1831 * any matches any IP. Actually returns an empty instruction.
1832 * me returns O_IP_*_ME
1833 * <table_id> O_IP_*_TABLE
1834 * [iface[:net]] O_IP_*_IFIP
1835 * 1.2.3.4 single IP address
1836 * 1.2.3.4:5.6.7.8 address:mask
1837 * 1.2.3.4/24 address/mask
1838 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1839 */
1840 static void
1841 fill_ip(ipfw_insn_ip *cmd, char *av)
1842 {
1843 char *p = NULL, md = 0;
1844 u_int32_t i;
1845
1846 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1847
1848 if (!strncmp(av, "any", strlen(av)))
1849 return;
1850
1851 if (!strncmp(av, "me", strlen(av))) {
1852 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1853 return;
1854 }
1855
1856 if (strlen(av) >= 3 && av[0] == '<' && av[strlen(av) - 1] == '>') {
1857 int pos = strlen(av) - 1;
1858 uint16_t tableid;
1859 char *eptr;
1860
1861 /*
1862 * Table: "<tableid>"
1863 */
1864 av[pos] = '\0';
1865 tableid = strtoul(&av[1], &eptr, 0);
1866 if (*eptr != '\0') {
1867 av[pos] = '>';
1868 errx(EX_DATAERR, "invalid tableid ``%s''", av);
1869 }
1870 av[pos] = '>';
1871 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1872 cmd->o.opcode = O_IP_DST_TABLE;
1873 cmd->o.arg1 = tableid;
1874 return;
1875 }
1876
1877 if (strlen(av) >= 3 && av[0] == '[' && av[strlen(av) - 1] == ']') {
1878 int pos = strlen(av) - 1;
1879 ipfw_insn_ifip *cmd1 = (ipfw_insn_ifip *)cmd;
1880 char *c;
1881
1882 /*
1883 * Interface IP: "[ifname[:net]]"
1884 */
1885 cmd1->o.len |= F_INSN_SIZE(ipfw_insn_ifip);
1886 cmd1->o.opcode = O_IP_DST_IFIP;
1887 cmd1->o.arg1 = 0;
1888 cmd1->addr.s_addr = 0;
1889 cmd1->mask.s_addr = 0;
1890
1891 av[pos] = '\0';
1892 c = strchr(av, ':');
1893 if (c != NULL) {
1894 if (strcmp(c + 1, "net") == 0) {
1895 cmd1->o.arg1 |= IPFW_IFIP_NET;
1896 } else {
1897 errx(EX_DATAERR, "invalid ifname modifier: %s",
1898 c + 1);
1899 }
1900 *c = '\0';
1901 }
1902
1903 strlcpy(cmd1->ifname, &av[1], sizeof(cmd1->ifname));
1904 if (c != NULL)
1905 *c = ':';
1906 av[pos] = ']';
1907 return;
1908 }
1909
1910 p = strchr(av, '/');
1911 if (!p)
1912 p = strchr(av, ':');
1913 if (p) {
1914 md = *p;
1915 *p++ = '\0';
1916 }
1917
1918 if (lookup_host(av, &cmd->addr) != 0)
1919 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
1920 switch (md) {
1921 case ':':
1922 if (!inet_aton(p, &cmd->mask))
1923 errx(EX_DATAERR, "bad netmask ``%s''", p);
1924 break;
1925 case '/':
1926 i = atoi(p);
1927 if (i == 0)
1928 cmd->mask.s_addr = htonl(0);
1929 else if (i > 32)
1930 errx(EX_DATAERR, "bad width ``%s''", p);
1931 else
1932 cmd->mask.s_addr = htonl(~0U << (32 - i));
1933 break;
1934 default:
1935 cmd->mask.s_addr = htonl(~0);
1936 break;
1937 }
1938 cmd->addr.s_addr &= cmd->mask.s_addr;
1939 /*
1940 * now look if we have a set of addresses. They are stored as follows:
1941 * arg1 is the set size (powers of 2, 2..256)
1942 * addr is the base address IN HOST FORMAT
1943 * mask.. is an array of u_int32_t with bits set.
1944 */
1945 if (p)
1946 p = strchr(p, '{');
1947 if (p) { /* fetch addresses */
1948 u_int32_t *d;
1949 int low, high;
1950 int ii = contigmask((u_char *)&(cmd->mask), 32);
1951
1952 if (ii < 24 || ii > 31) {
1953 fprintf(stderr, "invalid set with mask %d\n",
1954 ii);
1955 exit(0);
1956 }
1957 cmd->o.arg1 = 1<<(32-ii);
1958 cmd->addr.s_addr = ntohl(cmd->addr.s_addr);
1959 d = (u_int32_t *)&cmd->mask;
1960 cmd->o.opcode = O_IP_DST_SET; /* default */
1961 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
1962 for (ii = 0; ii < (cmd->o.arg1+31)/32 ; ii++)
1963 d[ii] = 0; /* clear masks */
1964
1965 av = p+1;
1966 low = cmd->addr.s_addr & 0xff;
1967 high = low + cmd->o.arg1 - 1;
1968 while (isdigit(*av)) {
1969 char *str;
1970 u_int16_t a = strtol(av, &str, 0);
1971
1972 if (str == av) /* no parameter */
1973 break;
1974 if (a < low || a > high) {
1975 fprintf(stderr, "addr %d out of range [%d-%d]\n",
1976 a, low, high);
1977 exit(0);
1978 }
1979 a -= low;
1980 d[ a/32] |= 1<<(a & 31);
1981 if (*str != ',')
1982 break;
1983 av = str+1;
1984 }
1985 return;
1986 }
1987
1988 if (cmd->mask.s_addr == 0) { /* any */
1989 if (cmd->o.len & F_NOT)
1990 errx(EX_DATAERR, "not any never matches");
1991 else /* useless, nuke it */
1992 return;
1993 } else if (cmd->mask.s_addr == IP_MASK_ALL) /* one IP */
1994 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1995 else /* addr/mask */
1996 cmd->o.len |= F_INSN_SIZE(ipfw_insn_ip);
1997 }
1998
1999
2000 /*
2001 * helper function to process a set of flags and set bits in the
2002 * appropriate masks.
2003 */
2004 static void
2005 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2006 struct _s_x *flags, char *p)
2007 {
2008 u_int8_t set=0, clear=0;
2009
2010 while (p && *p) {
2011 char *q; /* points to the separator */
2012 int val;
2013 u_int8_t *which; /* mask we are working on */
2014
2015 if (*p == '!') {
2016 p++;
2017 which = &clear;
2018 } else
2019 which = &set;
2020 q = strchr(p, ',');
2021 if (q)
2022 *q++ = '\0';
2023 val = match_token(flags, p);
2024 if (val <= 0)
2025 errx(EX_DATAERR, "invalid flag %s", p);
2026 *which |= (u_int8_t)val;
2027 p = q;
2028 }
2029 cmd->opcode = opcode;
2030 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2031 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2032 }
2033
2034
2035 static void
2036 delete(int ac, char *av[])
2037 {
2038 u_int32_t rulenum;
2039 struct dn_ioc_pipe pipe;
2040 int i;
2041 int exitval = EX_OK;
2042 int do_set = 0;
2043
2044 memset(&pipe, 0, sizeof pipe);
2045
2046 av++; ac--;
2047 if (ac > 0 && !strncmp(*av, "set", strlen(*av))) {
2048 do_set = 1; /* delete set */
2049 ac--; av++;
2050 }
2051
2052 /* Rule number */
2053 while (ac && isdigit(**av)) {
2054 i = atoi(*av); av++; ac--;
2055 if (do_pipe) {
2056 if (do_pipe == 1)
2057 pipe.pipe_nr = i;
2058 else
2059 pipe.fs.fs_nr = i;
2060 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_DEL,
2061 &pipe, sizeof pipe);
2062 if (i) {
2063 exitval = 1;
2064 warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
2065 do_pipe == 1 ? pipe.pipe_nr :
2066 pipe.fs.fs_nr);
2067 }
2068 } else {
2069 rulenum = (i & 0xffff) | (do_set << 24);
2070 i = setsockopt(s, IPPROTO_IP, IP_FW_DEL, &rulenum,
2071 sizeof rulenum);
2072 if (i) {
2073 exitval = EX_UNAVAILABLE;
2074 warn("rule %u: setsockopt(IP_FW_DEL)",
2075 rulenum);
2076 }
2077 }
2078 }
2079 if (exitval != EX_OK)
2080 exit(exitval);
2081 }
2082
2083
2084 /*
2085 * fill the interface structure. We do not check the name as we can
2086 * create interfaces dynamically, so checking them at insert time
2087 * makes relatively little sense.
2088 * Interface names containing '*', '?', or '[' are assumed to be shell
2089 * patterns which match interfaces.
2090 */
2091 static void
2092 fill_iface(ipfw_insn_if *cmd, char *arg)
2093 {
2094 cmd->name[0] = '\0';
2095 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2096
2097 /* Parse the interface or address */
2098 if (!strcmp(arg, "any"))
2099 cmd->o.len = 0; /* effectively ignore this command */
2100 else if (!isdigit(*arg)) {
2101 strlcpy(cmd->name, arg, sizeof(cmd->name));
2102 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2103 } else if (!inet_aton(arg, &cmd->p.ip))
2104 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2105 }
2106
2107 static unsigned long
2108 getbw(const char *str, u_short *flags, int kb)
2109 {
2110 char *end;
2111 unsigned long val;
2112 int inbytes = 0;
2113
2114 val = strtoul(str, &end, 0);
2115 if (*end == 'k' || *end == 'K') {
2116 ++end;
2117 val *= kb;
2118 } else if (*end == 'm' || *end == 'M') {
2119 ++end;
2120 val *= kb * kb;
2121 }
2122
2123 /*
2124 * Deal with bits or bytes or b(bits) or B(bytes). If there is no
2125 * trailer assume bits.
2126 */
2127 if (strncasecmp(end, "bit", 3) == 0) {
2128 ;
2129 } else if (strncasecmp(end, "byte", 4) == 0) {
2130 inbytes = 1;
2131 } else if (*end == 'b') {
2132 ;
2133 } else if (*end == 'B') {
2134 inbytes = 1;
2135 }
2136
2137 /*
2138 * Return in bits if flags is NULL, else flag bits
2139 * or bytes in flags and return the unconverted value.
2140 */
2141 if (inbytes && flags)
2142 *flags |= DN_QSIZE_IS_BYTES;
2143 else if (inbytes && flags == NULL)
2144 val *= 8;
2145 return(val);
2146 }
2147
2148 /*
2149 * the following macro returns an error message if we run out of
2150 * arguments.
2151 */
2152 #define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
2153
2154 static void
2155 config_pipe(int ac, char **av)
2156 {
2157 struct dn_ioc_pipe pipe;
2158 int i;
2159 char *end;
2160 u_int32_t a;
2161
2162 memset(&pipe, 0, sizeof pipe);
2163
2164 av++; ac--;
2165 /* Pipe number */
2166 if (ac && isdigit(**av)) {
2167 i = atoi(*av); av++; ac--;
2168 if (do_pipe == 1)
2169 pipe.pipe_nr = i;
2170 else
2171 pipe.fs.fs_nr = i;
2172 }
2173 while (ac > 0) {
2174 double d;
2175 int tok = match_token(dummynet_params, *av);
2176 ac--; av++;
2177
2178 switch(tok) {
2179 case TOK_NOERROR:
2180 pipe.fs.flags_fs |= DN_NOERROR;
2181 break;
2182
2183 case TOK_PLR:
2184 NEED1("plr needs argument 0..1\n");
2185 d = strtod(av[0], NULL);
2186 if (d > 1)
2187 d = 1;
2188 else if (d < 0)
2189 d = 0;
2190 pipe.fs.plr = (int)(d*0x7fffffff);
2191 ac--; av++;
2192 break;
2193
2194 case TOK_QUEUE:
2195 NEED1("queue needs queue size\n");
2196 end = NULL;
2197 pipe.fs.qsize = getbw(av[0], &pipe.fs.flags_fs, 1024);
2198 ac--; av++;
2199 break;
2200
2201 case TOK_BUCKETS:
2202 NEED1("buckets needs argument\n");
2203 pipe.fs.rq_size = strtoul(av[0], NULL, 0);
2204 ac--; av++;
2205 break;
2206
2207 case TOK_MASK:
2208 NEED1("mask needs mask specifier\n");
2209 /*
2210 * per-flow queue, mask is dst_ip, dst_port,
2211 * src_ip, src_port, proto measured in bits
2212 */
2213
2214 pipe.fs.flow_mask.type = ETHERTYPE_IP;
2215 pipe.fs.flow_mask.u.ip.dst_ip = 0;
2216 pipe.fs.flow_mask.u.ip.src_ip = 0;
2217 pipe.fs.flow_mask.u.ip.dst_port = 0;
2218 pipe.fs.flow_mask.u.ip.src_port = 0;
2219 pipe.fs.flow_mask.u.ip.proto = 0;
2220 end = NULL;
2221
2222 while (ac >= 1) {
2223 u_int32_t *p32 = NULL;
2224 u_int16_t *p16 = NULL;
2225
2226 tok = match_token(dummynet_params, *av);
2227 ac--; av++;
2228 switch(tok) {
2229 case TOK_ALL:
2230 /*
2231 * special case, all bits significant
2232 */
2233 pipe.fs.flow_mask.u.ip.dst_ip = ~0;
2234 pipe.fs.flow_mask.u.ip.src_ip = ~0;
2235 pipe.fs.flow_mask.u.ip.dst_port = ~0;
2236 pipe.fs.flow_mask.u.ip.src_port = ~0;
2237 pipe.fs.flow_mask.u.ip.proto = ~0;
2238 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2239 goto end_mask;
2240
2241 case TOK_DSTIP:
2242 p32 = &pipe.fs.flow_mask.u.ip.dst_ip;
2243 break;
2244
2245 case TOK_SRCIP:
2246 p32 = &pipe.fs.flow_mask.u.ip.src_ip;
2247 break;
2248
2249 case TOK_DSTPORT:
2250 p16 = &pipe.fs.flow_mask.u.ip.dst_port;
2251 break;
2252
2253 case TOK_SRCPORT:
2254 p16 = &pipe.fs.flow_mask.u.ip.src_port;
2255 break;
2256
2257 case TOK_PROTO:
2258 break;
2259
2260 default:
2261 ac++; av--; /* backtrack */
2262 goto end_mask;
2263 }
2264 if (ac < 1)
2265 errx(EX_USAGE, "mask: value missing");
2266 if (*av[0] == '/') {
2267 a = strtoul(av[0]+1, &end, 0);
2268 a = (a == 32) ? ~0 : (1 << a) - 1;
2269 } else
2270 a = strtoul(av[0], &end, 0);
2271 if (p32 != NULL)
2272 *p32 = a;
2273 else if (p16 != NULL) {
2274 if (a > 65535)
2275 errx(EX_DATAERR,
2276 "mask: must be 16 bit");
2277 *p16 = (u_int16_t)a;
2278 } else {
2279 if (a > 255)
2280 errx(EX_DATAERR,
2281 "mask: must be 8 bit");
2282 pipe.fs.flow_mask.u.ip.proto = (uint8_t)a;
2283 }
2284 if (a != 0)
2285 pipe.fs.flags_fs |= DN_HAVE_FLOW_MASK;
2286 ac--; av++;
2287 } /* end while, config masks */
2288 end_mask:
2289 break;
2290
2291 case TOK_RED:
2292 case TOK_GRED:
2293 NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
2294 pipe.fs.flags_fs |= DN_IS_RED;
2295 if (tok == TOK_GRED)
2296 pipe.fs.flags_fs |= DN_IS_GENTLE_RED;
2297 /*
2298 * the format for parameters is w_q/min_th/max_th/max_p
2299 */
2300 if ((end = strsep(&av[0], "/"))) {
2301 double w_q = strtod(end, NULL);
2302 if (w_q > 1 || w_q <= 0)
2303 errx(EX_DATAERR, "0 < w_q <= 1");
2304 pipe.fs.w_q = (int) (w_q * (1 << SCALE_RED));
2305 }
2306 if ((end = strsep(&av[0], "/"))) {
2307 pipe.fs.min_th = strtoul(end, &end, 0);
2308 if (*end == 'K' || *end == 'k')
2309 pipe.fs.min_th *= 1024;
2310 }
2311 if ((end = strsep(&av[0], "/"))) {
2312 pipe.fs.max_th = strtoul(end, &end, 0);
2313 if (*end == 'K' || *end == 'k')
2314 pipe.fs.max_th *= 1024;
2315 }
2316 if ((end = strsep(&av[0], "/"))) {
2317 double max_p = strtod(end, NULL);
2318 if (max_p > 1 || max_p <= 0)
2319 errx(EX_DATAERR, "0 < max_p <= 1");
2320 pipe.fs.max_p = (int)(max_p * (1 << SCALE_RED));
2321 }
2322 ac--; av++;
2323 break;
2324
2325 case TOK_DROPTAIL:
2326 pipe.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
2327 break;
2328
2329 case TOK_BW:
2330 NEED1("bw needs bandwidth\n");
2331 if (do_pipe != 1)
2332 errx(EX_DATAERR, "bandwidth only valid for pipes");
2333 /*
2334 * set bandwidth value
2335 */
2336 pipe.bandwidth = getbw(av[0], NULL, 1000);
2337 if (pipe.bandwidth < 0)
2338 errx(EX_DATAERR, "bandwidth too large");
2339 ac--; av++;
2340 break;
2341
2342 case TOK_DELAY:
2343 if (do_pipe != 1)
2344 errx(EX_DATAERR, "delay only valid for pipes");
2345 NEED1("delay needs argument 0..10000ms\n");
2346 pipe.delay = strtoul(av[0], NULL, 0);
2347 ac--; av++;
2348 break;
2349
2350 case TOK_WEIGHT:
2351 if (do_pipe == 1)
2352 errx(EX_DATAERR,"weight only valid for queues");
2353 NEED1("weight needs argument 0..100\n");
2354 pipe.fs.weight = strtoul(av[0], &end, 0);
2355 ac--; av++;
2356 break;
2357
2358 case TOK_PIPE:
2359 if (do_pipe == 1)
2360 errx(EX_DATAERR,"pipe only valid for queues");
2361 NEED1("pipe needs pipe_number\n");
2362 pipe.fs.parent_nr = strtoul(av[0], &end, 0);
2363 ac--; av++;
2364 break;
2365
2366 default:
2367 errx(EX_DATAERR, "unrecognised option ``%s''", *av);
2368 }
2369 }
2370 if (do_pipe == 1) {
2371 if (pipe.pipe_nr == 0)
2372 errx(EX_DATAERR, "pipe_nr must be > 0");
2373 if (pipe.delay > 10000)
2374 errx(EX_DATAERR, "delay must be < 10000");
2375 } else { /* do_pipe == 2, queue */
2376 if (pipe.fs.parent_nr == 0)
2377 errx(EX_DATAERR, "pipe must be > 0");
2378 if (pipe.fs.weight >100)
2379 errx(EX_DATAERR, "weight must be <= 100");
2380 }
2381 if (pipe.fs.flags_fs & DN_QSIZE_IS_BYTES) {
2382 if (pipe.fs.qsize > 1024*1024)
2383 errx(EX_DATAERR, "queue size must be < 1MB");
2384 } else {
2385 if (pipe.fs.qsize > 100)
2386 errx(EX_DATAERR, "2 <= queue size <= 100");
2387 }
2388 if (pipe.fs.flags_fs & DN_IS_RED) {
2389 size_t len;
2390 int lookup_depth, avg_pkt_size;
2391 double step, idle, weight, w_q;
2392 int clock_hz;
2393 int t;
2394
2395 if (pipe.fs.min_th >= pipe.fs.max_th)
2396 errx(EX_DATAERR, "min_th %d must be < than max_th %d",
2397 pipe.fs.min_th, pipe.fs.max_th);
2398 if (pipe.fs.max_th == 0)
2399 errx(EX_DATAERR, "max_th must be > 0");
2400
2401 len = sizeof(int);
2402 if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
2403 &lookup_depth, &len, NULL, 0) == -1)
2404
2405 errx(1, "sysctlbyname(\"%s\")",
2406 "net.inet.ip.dummynet.red_lookup_depth");
2407 if (lookup_depth == 0)
2408 errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
2409 " must be greater than zero");
2410
2411 len = sizeof(int);
2412 if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
2413 &avg_pkt_size, &len, NULL, 0) == -1)
2414
2415 errx(1, "sysctlbyname(\"%s\")",
2416 "net.inet.ip.dummynet.red_avg_pkt_size");
2417 if (avg_pkt_size == 0)
2418 errx(EX_DATAERR,
2419 "net.inet.ip.dummynet.red_avg_pkt_size must"
2420 " be greater than zero");
2421
2422 len = sizeof(clock_hz);
2423 if (sysctlbyname("net.inet.ip.dummynet.hz", &clock_hz, &len,
2424 NULL, 0) == -1) {
2425 errx(1, "sysctlbyname(\"%s\")",
2426 "net.inet.ip.dummynet.hz");
2427 }
2428
2429 /*
2430 * Ticks needed for sending a medium-sized packet.
2431 * Unfortunately, when we are configuring a WF2Q+ queue, we
2432 * do not have bandwidth information, because that is stored
2433 * in the parent pipe, and also we have multiple queues
2434 * competing for it. So we set step=0, which is not very
2435 * correct. But on the other hand, why do we want RED with
2436 * WF2Q+ ?
2437 */
2438 if (pipe.bandwidth==0) /* this is a WF2Q+ queue */
2439 step = 0;
2440 else
2441 step = clock_hz * avg_pkt_size * 8 / pipe.bandwidth;
2442
2443 /*
2444 * max idle time (in ticks) before avg queue size becomes 0.
2445 * NOTA: (3/w_q) is approx the value x so that
2446 * (1-w_q)^x < 10^-3.
2447 */
2448 w_q = ((double)pipe.fs.w_q) / (1 << SCALE_RED);
2449 idle = step * 3. / w_q;
2450 pipe.fs.lookup_step = (int)idle / lookup_depth;
2451 if (!pipe.fs.lookup_step)
2452 pipe.fs.lookup_step = 1;
2453 weight = 1 - w_q;
2454 for (t = pipe.fs.lookup_step; t > 0; --t)
2455 weight *= weight;
2456 pipe.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
2457 }
2458 i = setsockopt(s, IPPROTO_IP, IP_DUMMYNET_CONFIGURE, &pipe,
2459 sizeof pipe);
2460 if (i)
2461 err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
2462 }
2463
2464 static void
2465 get_mac_addr_mask(char *p, u_char *addr, u_char *mask)
2466 {
2467 int i, l;
2468
2469 for (i=0; i<6; i++)
2470 addr[i] = mask[i] = 0;
2471 if (!strcmp(p, "any"))
2472 return;
2473
2474 for (i=0; *p && i<6;i++, p++) {
2475 addr[i] = strtol(p, &p, 16);
2476 if (*p != ':') /* we start with the mask */
2477 break;
2478 }
2479 if (*p == '/') { /* mask len */
2480 l = strtol(p+1, &p, 0);
2481 for (i=0; l>0; l -=8, i++)
2482 mask[i] = (l >=8) ? 0xff : (~0U) << (8-l);
2483 } else if (*p == '&') { /* mask */
2484 for (i=0, p++; *p && i<6;i++, p++) {
2485 mask[i] = strtol(p, &p, 16);
2486 if (*p != ':')
2487 break;
2488 }
2489 } else if (*p == '\0') {
2490 for (i=0; i<6; i++)
2491 mask[i] = 0xff;
2492 }
2493 for (i=0; i<6; i++)
2494 addr[i] &= mask[i];
2495 }
2496
2497 /*
2498 * helper function, updates the pointer to cmd with the length
2499 * of the current command, and also cleans up the first word of
2500 * the new command in case it has been clobbered before.
2501 */
2502 static ipfw_insn *
2503 next_cmd(ipfw_insn *cmd)
2504 {
2505 cmd += F_LEN(cmd);
2506 bzero(cmd, sizeof(*cmd));
2507 return cmd;
2508 }
2509
2510 /*
2511 * A function to fill simple commands of size 1.
2512 * Existing flags are preserved.
2513 */
2514 static void
2515 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, u_int16_t arg)
2516 {
2517 cmd->opcode = opcode;
2518 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2519 cmd->arg1 = arg;
2520 }
2521
2522 /*
2523 * Fetch and add the MAC address and type, with masks. This generates one or
2524 * two microinstructions, and returns the pointer to the last one.
2525 */
2526 static ipfw_insn *
2527 add_mac(ipfw_insn *cmd, int ac, char *av[])
2528 {
2529 ipfw_insn_mac *mac;
2530
2531 if (ac < 2)
2532 errx(EX_DATAERR, "MAC dst src");
2533
2534 cmd->opcode = O_MACADDR2;
2535 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2536
2537 mac = (ipfw_insn_mac *)cmd;
2538 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2539 get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
2540 return cmd;
2541 }
2542
2543 static ipfw_insn *
2544 add_mactype(ipfw_insn *cmd, int ac, char *av)
2545 {
2546 if (ac < 1)
2547 errx(EX_DATAERR, "missing MAC type");
2548 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2549 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2550 cmd->opcode = O_MAC_TYPE;
2551 return cmd;
2552 } else
2553 return NULL;
2554 }
2555
2556 static ipfw_insn *
2557 add_proto(ipfw_insn *cmd, char *av)
2558 {
2559 struct protoent *pe;
2560 u_char proto = 0;
2561
2562 if (!strncmp(av, "all", strlen(av)))
2563 ; /* same as "ip" */
2564 else if ((proto = atoi(av)) > 0)
2565 ; /* all done! */
2566 else if ((pe = getprotobyname(av)) != NULL)
2567 proto = pe->p_proto;
2568 else
2569 return NULL;
2570 if (proto != IPPROTO_IP)
2571 fill_cmd(cmd, O_PROTO, 0, proto);
2572 return cmd;
2573 }
2574
2575 static ipfw_insn *
2576 add_srcip(ipfw_insn *cmd, char *av)
2577 {
2578 fill_ip((ipfw_insn_ip *)cmd, av);
2579 if (cmd->opcode == O_IP_DST_SET) /* set */
2580 cmd->opcode = O_IP_SRC_SET;
2581 else if (cmd->opcode == O_IP_DST_TABLE) /* table */
2582 cmd->opcode = O_IP_SRC_TABLE;
2583 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */
2584 cmd->opcode = O_IP_SRC_IFIP;
2585 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2586 cmd->opcode = O_IP_SRC_ME;
2587 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2588 cmd->opcode = O_IP_SRC;
2589 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2590 cmd->opcode = O_IP_SRC_MASK;
2591 return cmd;
2592 }
2593
2594 static ipfw_insn *
2595 add_dstip(ipfw_insn *cmd, char *av)
2596 {
2597 fill_ip((ipfw_insn_ip *)cmd, av);
2598 if (cmd->opcode == O_IP_DST_SET) /* set */
2599 ;
2600 else if (cmd->opcode == O_IP_DST_TABLE) /* table */
2601 ;
2602 else if (cmd->opcode == O_IP_DST_IFIP) /* iface's IP */
2603 ;
2604 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2605 cmd->opcode = O_IP_DST_ME;
2606 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2607 cmd->opcode = O_IP_DST;
2608 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_ip)) /* addr/mask */
2609 cmd->opcode = O_IP_DST_MASK;
2610 return cmd;
2611 }
2612
2613 static ipfw_insn *
2614 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2615 {
2616 if (!strncmp(av, "any", strlen(av))) {
2617 return NULL;
2618 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2619 /* XXX todo: check that we have a protocol with ports */
2620 cmd->opcode = opcode;
2621 return cmd;
2622 }
2623 return NULL;
2624 }
2625
2626 static void
2627 fill_rdr(ipfw_insn *cmd, char *av)
2628 {
2629 ipfw_insn_rdr *c = (ipfw_insn_rdr *)cmd;
2630 char *p;
2631
2632 cmd->opcode = O_REDIRECT;
2633 cmd->len = F_INSN_SIZE(ipfw_insn_rdr);
2634 cmd->arg1 = 0;
2635 c->addr.s_addr = INADDR_ANY;
2636 c->port = 0;
2637 c->set = UINT16_MAX;
2638
2639 p = strchr(av, ',');
2640 if (p == NULL)
2641 p = strchr(av, ':');
2642 if (p != NULL)
2643 *p = '\0';
2644 lookup_host(av, &c->addr);
2645
2646 if (p != NULL && *(p + 1) != '\0') {
2647 char *ep;
2648
2649 c->port = strtoul(p + 1, &ep, 0);
2650 if (*ep != '\0')
2651 errx(EX_DATAERR, "illegal port %s", p + 1);
2652 c->port = htons(c->port);
2653 }
2654 }
2655
2656 /*
2657 * Parse arguments and assemble the microinstructions which make up a rule.
2658 * Rules are added into the 'rulebuf' and then copied in the correct order
2659 * into the actual rule.
2660 *
2661 * The syntax for a rule starts with the action, followed by an
2662 * optional log action, and the various match patterns.
2663 * In the assembled microcode, the first opcode must be a O_PROBE_STATE
2664 * (generated if the rule includes a keep-state option), then the
2665 * various match patterns, the "log" action, and the actual action.
2666 *
2667 */
2668 static void
2669 add(int ac, char *av[])
2670 {
2671 /*
2672 * rules are added into the 'rulebuf' and then copied in
2673 * the correct order into the actual rule.
2674 * Some things that need to go out of order (prob, action etc.)
2675 * go into actbuf[].
2676 */
2677 static uint32_t rulebuf[IPFW_RULE_SIZE_MAX];
2678 static uint32_t actbuf[IPFW_RULE_SIZE_MAX];
2679 static uint32_t cmdbuf[IPFW_RULE_SIZE_MAX];
2680
2681 ipfw_insn *src, *dst, *cmd, *action, *prev = NULL;
2682 ipfw_insn *first_cmd; /* first match pattern */
2683
2684 struct ipfw_ioc_rule *rule;
2685
2686 /*
2687 * various flags used to record that we entered some fields.
2688 */
2689 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2690
2691 int i;
2692
2693 int open_par = 0; /* open parenthesis ( */
2694
2695 int has_dstport = 0;
2696 int has_recv = 0;
2697
2698 /* proto is here because it is used to fetch ports */
2699 u_char proto = IPPROTO_IP; /* default protocol */
2700
2701 double match_prob = 1; /* match probability, default is always match */
2702
2703 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2704 bzero(cmdbuf, sizeof(cmdbuf));
2705 bzero(rulebuf, sizeof(rulebuf));
2706
2707 rule = (struct ipfw_ioc_rule *)rulebuf;
2708 cmd = (ipfw_insn *)cmdbuf;
2709 action = (ipfw_insn *)actbuf;
2710
2711 av++; ac--;
2712
2713 /* [rule N] -- Rule number optional */
2714 if (ac && isdigit(**av)) {
2715 rule->rulenum = atoi(*av);
2716 av++;
2717 ac--;
2718 }
2719
2720 /* [set N] -- set number (0..30), optional */
2721 if (ac > 1 && !strncmp(*av, "set", strlen(*av))) {
2722 int set = strtoul(av[1], NULL, 10);
2723 if (set < 0 || set > 30)
2724 errx(EX_DATAERR, "illegal set %s", av[1]);
2725 rule->set = set;
2726 av += 2; ac -= 2;
2727 }
2728
2729 /* [prob D] -- match probability, optional */
2730 if (ac > 1 && !strncmp(*av, "prob", strlen(*av))) {
2731 match_prob = strtod(av[1], NULL);
2732
2733 if (match_prob <= 0 || match_prob > 1)
2734 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2735 av += 2; ac -= 2;
2736 }
2737
2738 /* action -- mandatory */
2739 NEED1("missing action");
2740 i = match_token(rule_actions, *av);
2741 ac--; av++;
2742 action->len = 1; /* default */
2743 switch(i) {
2744 case TOK_CHECKSTATE:
2745 have_state = action;
2746 action->opcode = O_CHECK_STATE;
2747 break;
2748
2749 case TOK_ACCEPT:
2750 action->opcode = O_ACCEPT;
2751 break;
2752
2753 case TOK_DEFRAG:
2754 action->opcode = O_DEFRAG;
2755 action->arg1 = 0;
2756 break;
2757
2758 case TOK_DENY:
2759 action->opcode = O_DENY;
2760 action->arg1 = 0;
2761 break;
2762
2763 case TOK_REJECT:
2764 action->opcode = O_REJECT;
2765 action->arg1 = ICMP_UNREACH_HOST;
2766 break;
2767
2768 case TOK_RESET:
2769 action->opcode = O_REJECT;
2770 action->arg1 = ICMP_REJECT_RST;
2771 break;
2772
2773 case TOK_UNREACH:
2774 action->opcode = O_REJECT;
2775 NEED1("missing reject code");
2776 fill_reject_code(&action->arg1, *av);
2777 ac--; av++;
2778 break;
2779
2780 case TOK_COUNT:
2781 action->opcode = O_COUNT;
2782 break;
2783
2784 case TOK_QUEUE:
2785 case TOK_PIPE:
2786 action->len = F_INSN_SIZE(ipfw_insn_pipe);
2787 /* FALLTHROUGH */
2788 case TOK_SKIPTO:
2789 if (i == TOK_QUEUE)
2790 action->opcode = O_QUEUE;
2791 else if (i == TOK_PIPE)
2792 action->opcode = O_PIPE;
2793 else if (i == TOK_SKIPTO)
2794 action->opcode = O_SKIPTO;
2795 NEED1("missing skipto/pipe/queue number");
2796 action->arg1 = strtoul(*av, NULL, 10);
2797 av++; ac--;
2798 break;
2799
2800 case TOK_DIVERT:
2801 case TOK_TEE:
2802 action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
2803 NEED1("missing divert/tee port");
2804 action->arg1 = strtoul(*av, NULL, 0);
2805 if (action->arg1 == 0) {
2806 struct servent *serv;
2807 setservent(1);
2808 serv = getservbyname(av[0], "divert");
2809 if (serv != NULL)
2810 action->arg1 = ntohs(serv->s_port);
2811 else
2812 errx(EX_DATAERR, "illegal divert/tee port");
2813 }
2814 ac--; av++;
2815 break;
2816
2817 case TOK_FORWARD: {
2818 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2819 char *st, *end;
2820
2821 NEED1("missing forward address[:port]");
2822
2823 action->opcode = O_FORWARD_IP;
2824 action->len = F_INSN_SIZE(ipfw_insn_sa);
2825
2826 p->sa.sin_len = sizeof(struct sockaddr_in);
2827 p->sa.sin_family = AF_INET;
2828 p->sa.sin_port = 0;
2829 /*
2830 * locate the address-port separator (':' or ',')
2831 */
2832 st = strchr(*av, ':');
2833 if (st == NULL)
2834 st = strchr(*av, ',');
2835 if (st != NULL) {
2836 *(st++) = '\0';
2837 i = strtoport(st, &end, 0 /* base */, 0 /* proto */);
2838 if (st == end)
2839 errx(EX_DATAERR,
2840 "illegal forwarding port ``%s''", st);
2841 p->sa.sin_port = (u_short)i;
2842 }
2843 lookup_host(*av, &(p->sa.sin_addr));
2844 }
2845 ac--; av++;
2846 break;
2847
2848 default:
2849 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2850 }
2851 action = next_cmd(action);
2852
2853 /*
2854 * [log [logamount N]] -- log, optional
2855 *
2856 * If exists, it goes first in the cmdbuf, but then it is
2857 * skipped in the copy section to the end of the buffer.
2858 */
2859 if (ac && !strncmp(*av, "log", strlen(*av))) {
2860 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2861
2862 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2863 cmd->opcode = O_LOG;
2864 av++; ac--;
2865 if (ac && !strncmp(*av, "logamount", strlen(*av))) {
2866 ac--; av++;
2867 NEED1("logamount requires argument");
2868 c->max_log = atoi(*av);
2869 ac--; av++;
2870 }
2871 cmd = next_cmd(cmd);
2872 }
2873
2874 if (have_state) /* must be a check-state, we are done */
2875 goto done;
2876
2877 #define OR_START(target) \
2878 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2879 if (open_par) \
2880 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2881 prev = NULL; \
2882 open_par = 1; \
2883 if ( (av[0])[1] == '\0') { \
2884 ac--; av++; \
2885 } else \
2886 (*av)++; \
2887 } \
2888 target: \
2889
2890
2891 #define CLOSE_PAR \
2892 if (open_par) { \
2893 if (ac && ( \
2894 !strncmp(*av, ")", strlen(*av)) || \
2895 !strncmp(*av, "}", strlen(*av)) )) { \
2896 prev = NULL; \
2897 open_par = 0; \
2898 ac--; av++; \
2899 } else \
2900 errx(EX_USAGE, "missing \")\"\n"); \
2901 }
2902
2903 #define NOT_BLOCK \
2904 if (ac && !strncmp(*av, "not", strlen(*av))) { \
2905 if (cmd->len & F_NOT) \
2906 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2907 cmd->len |= F_NOT; \
2908 ac--; av++; \
2909 }
2910
2911 #define OR_BLOCK(target) \
2912 if (ac && !strncmp(*av, "or", strlen(*av))) { \
2913 if (prev == NULL || open_par == 0) \
2914 errx(EX_DATAERR, "invalid OR block"); \
2915 prev->len |= F_OR; \
2916 ac--; av++; \
2917 goto target; \
2918 } \
2919 CLOSE_PAR;
2920
2921 first_cmd = cmd;
2922
2923 #if 0
2924 /*
2925 * MAC addresses, optional.
2926 * If we have this, we skip the part "proto from src to dst"
2927 * and jump straight to the option parsing.
2928 */
2929 NOT_BLOCK;
2930 NEED1("missing protocol");
2931 if (!strncmp(*av, "MAC", strlen(*av)) ||
2932 !strncmp(*av, "mac", strlen(*av))) {
2933 ac--; av++; /* the "MAC" keyword */
2934 add_mac(cmd, ac, av); /* exits in case of errors */
2935 cmd = next_cmd(cmd);
2936 ac -= 2; av += 2; /* dst-mac and src-mac */
2937 NOT_BLOCK;
2938 NEED1("missing mac type");
2939 if (add_mactype(cmd, ac, av[0]))
2940 cmd = next_cmd(cmd);
2941 ac--; av++; /* any or mac-type */
2942 goto read_options;
2943 }
2944 #endif
2945
2946 /*
2947 * protocol, mandatory
2948 */
2949 OR_START(get_proto);
2950 NOT_BLOCK;
2951 NEED1("missing protocol");
2952 if (add_proto(cmd, *av)) {
2953 av++; ac--;
2954 if (F_LEN(cmd) == 0) /* plain IP */
2955 proto = 0;
2956 else {
2957 proto = cmd->arg1;
2958 prev = cmd;
2959 cmd = next_cmd(cmd);
2960 }
2961 } else if (first_cmd != cmd) {
2962 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2963 } else
2964 goto read_options;
2965 OR_BLOCK(get_proto);
2966
2967 /*
2968 * "from", mandatory
2969 */
2970 if (!ac || strncmp(*av, "from", strlen(*av)))
2971 errx(EX_USAGE, "missing ``from''");
2972 ac--; av++;
2973
2974 /*
2975 * source IP, mandatory
2976 */
2977 OR_START(source_ip);
2978 NOT_BLOCK; /* optional "not" */
2979 NEED1("missing source address");
2980 if (add_srcip(cmd, *av)) {
2981 ac--; av++;
2982 if (F_LEN(cmd) != 0) { /* ! any */
2983 prev = cmd;
2984 cmd = next_cmd(cmd);
2985 }
2986 }
2987 OR_BLOCK(source_ip);
2988
2989 /*
2990 * source ports, optional
2991 */
2992 NOT_BLOCK; /* optional "not" */
2993 if (ac) {
2994 if (!strncmp(*av, "any", strlen(*av)) ||
2995 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
2996 ac--; av++;
2997 if (F_LEN(cmd) != 0)
2998 cmd = next_cmd(cmd);
2999 }
3000 }
3001
3002 /*
3003 * "to", mandatory
3004 */
3005 if (!ac || strncmp(*av, "to", strlen(*av)))
3006 errx(EX_USAGE, "missing ``to''");
3007 av++; ac--;
3008
3009 /*
3010 * destination, mandatory
3011 */
3012 OR_START(dest_ip);
3013 NOT_BLOCK; /* optional "not" */
3014 NEED1("missing dst address");
3015 if (add_dstip(cmd, *av)) {
3016 ac--; av++;
3017 if (F_LEN(cmd) != 0) { /* ! any */
3018 prev = cmd;
3019 cmd = next_cmd(cmd);
3020 }
3021 }
3022 OR_BLOCK(dest_ip);
3023
3024 /*
3025 * dest. ports, optional
3026 */
3027 NOT_BLOCK; /* optional "not" */
3028 if (ac) {
3029 if (!strncmp(*av, "any", strlen(*av)) ||
3030 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3031 ac--; av++;
3032 if (F_LEN(cmd) != 0) {
3033 has_dstport = 1;
3034 cmd = next_cmd(cmd);
3035 }
3036 }
3037 }
3038
3039 read_options:
3040 if (ac && first_cmd == cmd) {
3041 /*
3042 * nothing specified so far, store in the rule to ease
3043 * printout later.
3044 */
3045 rule->usr_flags = IPFW_USR_F_NORULE;
3046 }
3047 prev = NULL;
3048 while (ac) {
3049 char *s1;
3050 ipfw_insn_u32 *cmd32; /* alias for cmd */
3051
3052 s1 = *av;
3053 cmd32 = (ipfw_insn_u32 *)cmd;
3054
3055 if (*s1 == '!') { /* alternate syntax for NOT */
3056 if (cmd->len & F_NOT)
3057 errx(EX_USAGE, "double \"not\" not allowed\n");
3058 cmd->len = F_NOT;
3059 s1++;
3060 }
3061 i = match_token(rule_options, s1);
3062 ac--; av++;
3063 switch(i) {
3064 case TOK_NOT:
3065 if (cmd->len & F_NOT)
3066 errx(EX_USAGE, "double \"not\" not allowed\n");
3067 cmd->len = F_NOT;
3068 break;
3069
3070 case TOK_OR:
3071 if (open_par == 0 || prev == NULL)
3072 errx(EX_USAGE, "invalid \"or\" block\n");
3073 prev->len |= F_OR;
3074 break;
3075
3076 case TOK_STARTBRACE:
3077 if (open_par)
3078 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3079 open_par = 1;
3080 break;
3081
3082 case TOK_ENDBRACE:
3083 if (!open_par)
3084 errx(EX_USAGE, "+missing \")\"\n");
3085 open_par = 0;
3086 prev = NULL;
3087 break;
3088
3089 case TOK_IN:
3090 fill_cmd(cmd, O_IN, 0, 0);
3091 break;
3092
3093 case TOK_OUT:
3094 cmd->len ^= F_NOT; /* toggle F_NOT */
3095 fill_cmd(cmd, O_IN, 0, 0);
3096 break;
3097
3098 case TOK_FRAG:
3099 fill_cmd(cmd, O_FRAG, 0, 0);
3100 break;
3101
3102 case TOK_IPFRAG:
3103 fill_cmd(cmd, O_IPFRAG, 0, 0);
3104 break;
3105
3106 case TOK_LAYER2:
3107 fill_cmd(cmd, O_LAYER2, 0, 0);
3108 break;
3109
3110 case TOK_XMIT:
3111 case TOK_RECV:
3112 case TOK_VIA:
3113 NEED1("recv, xmit, via require interface name"
3114 " or address");
3115 fill_iface((ipfw_insn_if *)cmd, av[0]);
3116 ac--; av++;
3117 if (F_LEN(cmd) == 0) /* not a valid address */
3118 break;
3119 if (i == TOK_XMIT)
3120 cmd->opcode = O_XMIT;
3121 else if (i == TOK_RECV) {
3122 cmd->opcode = O_RECV;
3123 has_recv = 1;
3124 } else if (i == TOK_VIA)
3125 cmd->opcode = O_VIA;
3126 break;
3127
3128 case TOK_ICMPCODES:
3129 NEED1("icmpcodes requires list of codes");
3130 fill_icmp(O_ICMPCODE, (ipfw_insn_u32 *)cmd, *av);
3131 av++; ac--;
3132 break;
3133
3134 case TOK_ICMPTYPES:
3135 NEED1("icmptypes requires list of types");
3136 fill_icmp(O_ICMPTYPE, (ipfw_insn_u32 *)cmd, *av);
3137 av++; ac--;
3138 break;
3139
3140 case TOK_IPTTL:
3141 NEED1("ipttl requires TTL");
3142 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3143 ac--; av++;
3144 break;
3145
3146 case TOK_IPID:
3147 NEED1("ipid requires length");
3148 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3149 ac--; av++;
3150 break;
3151
3152 case TOK_IPLEN:
3153 NEED1("iplen requires length");
3154 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3155 ac--; av++;
3156 break;
3157
3158 case TOK_IPVER:
3159 NEED1("ipver requires version");
3160 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3161 ac--; av++;
3162 break;
3163
3164 case TOK_IPPRECEDENCE:
3165 NEED1("ipprecedence requires value");
3166 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3167 (strtoul(*av, NULL, 0) & 7) << 5);
3168 ac--; av++;
3169 break;
3170
3171 case TOK_IPOPTS:
3172 NEED1("missing argument for ipoptions");
3173 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3174 ac--; av++;
3175 break;
3176
3177 case TOK_IPTOS:
3178 NEED1("missing argument for iptos");
3179 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3180 ac--; av++;
3181 break;
3182
3183 case TOK_UID:
3184 NEED1("uid requires argument");
3185 {
3186 char *end;
3187 uid_t uid;
3188 struct passwd *pwd;
3189
3190 cmd->opcode = O_UID;
3191 uid = strtoul(*av, &end, 0);
3192 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3193 if (pwd == NULL)
3194 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3195 cmd32->d[0] = pwd->pw_uid;
3196 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3197 ac--; av++;
3198 }
3199 break;
3200
3201 case TOK_GID:
3202 NEED1("gid requires argument");
3203 {
3204 char *end;
3205 gid_t gid;
3206 struct group *grp;
3207
3208 cmd->opcode = O_GID;
3209 gid = strtoul(*av, &end, 0);
3210 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3211 if (grp == NULL)
3212 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3213 cmd32->d[0] = grp->gr_gid;
3214 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3215 ac--; av++;
3216 }
3217 break;
3218
3219 case TOK_ESTAB:
3220 fill_cmd(cmd, O_ESTAB, 0, 0);
3221 break;
3222
3223 case TOK_SETUP:
3224 fill_cmd(cmd, O_TCPFLAGS, 0,
3225 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3226 break;
3227
3228 case TOK_TCPOPTS:
3229 NEED1("missing argument for tcpoptions");
3230 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3231 ac--; av++;
3232 break;
3233
3234 case TOK_TCPSEQ:
3235 case TOK_TCPACK:
3236 NEED1("tcpseq/tcpack requires argument");
3237 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3238 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3239 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3240 ac--; av++;
3241 break;
3242
3243 case TOK_TCPWIN:
3244 NEED1("tcpwin requires length");
3245 fill_cmd(cmd, O_TCPWIN, 0,
3246 htons(strtoul(*av, NULL, 0)));
3247 ac--; av++;
3248 break;
3249
3250 case TOK_TCPFLAGS:
3251 NEED1("missing argument for tcpflags");
3252 cmd->opcode = O_TCPFLAGS;
3253 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3254 ac--; av++;
3255 break;
3256
3257 case TOK_REDIRECT:
3258 if (open_par)
3259 errx(EX_USAGE, "rdr cannot be part "
3260 "of an or block");
3261 if (have_state) {
3262 errx(EX_USAGE, "only one of rdr, keep-state "
3263 "and limit is allowed");
3264 }
3265 have_state = cmd;
3266 NEED1("rdr needs address and port");
3267 fill_rdr(cmd, *av);
3268 ac--; av++;
3269 break;
3270
3271 case TOK_KEEPSTATE:
3272 if (open_par)
3273 errx(EX_USAGE, "keep-state cannot be part "
3274 "of an or block");
3275 if (have_state) {
3276 errx(EX_USAGE, "only one of rdr, keep-state "
3277 "and limit is allowed");
3278 }
3279 have_state = cmd;
3280 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3281 break;
3282
3283 case TOK_LIMIT:
3284 if (open_par)
3285 errx(EX_USAGE, "limit cannot be part "
3286 "of an or block");
3287 if (have_state) {
3288 errx(EX_USAGE, "only one of rdr, keep-state "
3289 "and limit is allowed");
3290 }
3291 NEED1("limit needs mask and # of connections");
3292 have_state = cmd;
3293 {
3294 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3295
3296 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3297 cmd->opcode = O_LIMIT;
3298 c->limit_mask = 0;
3299 c->conn_limit = 0;
3300 for (; ac >1 ;) {
3301 int val;
3302
3303 val = match_token(limit_masks, *av);
3304 if (val <= 0)
3305 break;
3306 c->limit_mask |= val;
3307 ac--; av++;
3308 }
3309 c->conn_limit = atoi(*av);
3310 if (c->conn_limit == 0)
3311 errx(EX_USAGE, "limit: limit must be >0");
3312 if (c->limit_mask == 0)
3313 errx(EX_USAGE, "missing limit mask");
3314 ac--; av++;
3315 }
3316 break;
3317
3318 case TOK_PROTO:
3319 NEED1("missing protocol");
3320 if (add_proto(cmd, *av)) {
3321 proto = cmd->arg1;
3322 ac--; av++;
3323 } else
3324 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3325 break;
3326
3327 case TOK_SRCIP:
3328 NEED1("missing source IP");
3329 if (add_srcip(cmd, *av)) {
3330 ac--; av++;
3331 }
3332 break;
3333
3334 case TOK_DSTIP:
3335 NEED1("missing destination IP");
3336 if (add_dstip(cmd, *av)) {
3337 ac--; av++;
3338 }
3339 break;
3340
3341 case TOK_SRCPORT:
3342 NEED1("missing source port");
3343 if (!strncmp(*av, "any", strlen(*av)) ||
3344 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3345 ac--; av++;
3346 } else
3347 errx(EX_DATAERR, "invalid source port %s", *av);
3348 break;
3349
3350 case TOK_DSTPORT:
3351 NEED1("missing destination port");
3352 if (!strncmp(*av, "any", strlen(*av)) ||
3353 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3354 if (F_LEN(cmd) != 0)
3355 has_dstport =1;
3356 ac--; av++;
3357 } else
3358 errx(EX_DATAERR, "invalid destination port %s",
3359 *av);
3360 break;
3361
3362 case TOK_MAC:
3363 if (ac < 2)
3364 errx(EX_USAGE, "MAC dst-mac src-mac");
3365 if (add_mac(cmd, ac, av)) {
3366 ac -= 2; av += 2;
3367 }
3368 break;
3369
3370 case TOK_MACTYPE:
3371 NEED1("missing mac type");
3372 if (!add_mactype(cmd, ac, *av))
3373 errx(EX_DATAERR, "invalid mac type %s", *av);
3374 ac--; av++;
3375 break;
3376
3377 default:
3378 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s1);
3379 }
3380 if (F_LEN(cmd) > 0) { /* prepare to advance */
3381 prev = cmd;
3382 cmd = next_cmd(cmd);
3383 }
3384 }
3385
3386 done:
3387 /*
3388 * Now copy stuff into the rule.
3389 * If we have a keep-state option, the first instruction
3390 * must be a PROBE_STATE (which is generated here).
3391 * If we have a LOG option, it was stored as the first command,
3392 * and now must be moved to the top of the action part.
3393 */
3394 dst = (ipfw_insn *)rule->cmd;
3395
3396 /*
3397 * First thing to write into the command stream is the match probability.
3398 */
3399 if (match_prob != 1) { /* 1 means always match */
3400 dst->opcode = O_PROB;
3401 dst->len = 2;
3402 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3403 dst += dst->len;
3404 }
3405
3406 /*
3407 * generate O_PROBE_STATE if necessary
3408 */
3409 if (have_state && have_state->opcode != O_CHECK_STATE) {
3410 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3411 dst = next_cmd(dst);
3412 }
3413 /*
3414 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_REDIRECT
3415 */
3416 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3417 i = F_LEN(src);
3418
3419 switch (src->opcode) {
3420 case O_LOG:
3421 case O_KEEP_STATE:
3422 case O_LIMIT:
3423 case O_REDIRECT:
3424 break;
3425 default:
3426 bcopy(src, dst, i * sizeof(u_int32_t));
3427 dst += i;
3428 }
3429 }
3430
3431 /*
3432 * put back the have_state command as last opcode
3433 */
3434 if (have_state && have_state->opcode != O_CHECK_STATE) {
3435 i = F_LEN(have_state);
3436 bcopy(have_state, dst, i * sizeof(u_int32_t));
3437 dst += i;
3438
3439 if (have_state->opcode == O_REDIRECT &&
3440 (!has_dstport || !has_recv))
3441 errx(EX_USAGE, "missing \'dst-port\' or \'recv\'");
3442 }
3443 /*
3444 * start action section
3445 */
3446 rule->act_ofs = dst - rule->cmd;
3447
3448 /*
3449 * put back O_LOG if necessary
3450 */
3451 src = (ipfw_insn *)cmdbuf;
3452 if ( src->opcode == O_LOG ) {
3453 i = F_LEN(src);
3454 bcopy(src, dst, i * sizeof(u_int32_t));
3455 dst += i;
3456 }
3457 /*
3458 * copy all other actions
3459 */
3460 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3461 i = F_LEN(src);
3462 bcopy(src, dst, i * sizeof(u_int32_t));
3463 dst += i;
3464 }
3465
3466 rule->cmd_len = (u_int32_t *)dst - (u_int32_t *)(rule->cmd);
3467 i = (uint8_t *)dst - (uint8_t *)rule;
3468 if (getsockopt(s, IPPROTO_IP, IP_FW_ADD, rule, &i) == -1)
3469 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3470 if (!do_quiet)
3471 show_ipfw(rule, 10, 10);
3472 }
3473
3474 static void
3475 zero(int ac, char *av[])
3476 {
3477 int rulenum;
3478 int failed = EX_OK;
3479
3480 av++; ac--;
3481
3482 if (!ac) {
3483 /* clear all entries */
3484 if (setsockopt(s, IPPROTO_IP, IP_FW_ZERO, NULL, 0) < 0)
3485 err(EX_UNAVAILABLE, "setsockopt(%s)", "IP_FW_ZERO");
3486 if (!do_quiet)
3487 printf("Accounting cleared.\n");
3488
3489 return;
3490 }
3491
3492 while (ac) {
3493 /* Rule number */
3494 if (isdigit(**av)) {
3495 rulenum = atoi(*av);
3496 av++;
3497 ac--;
3498 if (setsockopt(s, IPPROTO_IP,
3499 IP_FW_ZERO, &rulenum, sizeof rulenum)) {
3500 warn("rule %u: setsockopt(IP_FW_ZERO)",
3501 rulenum);
3502 failed = EX_UNAVAILABLE;
3503 } else if (!do_quiet)
3504 printf("Entry %d cleared\n", rulenum);
3505 } else {
3506 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3507 }
3508 }
3509 if (failed != EX_OK)
3510 exit(failed);
3511 }
3512
3513 static void
3514 resetlog(int ac, char *av[])
3515 {
3516 int rulenum;
3517 int failed = EX_OK;
3518
3519 av++; ac--;
3520
3521 if (!ac) {
3522 /* clear all entries */
3523 if (setsockopt(s, IPPROTO_IP, IP_FW_RESETLOG, NULL, 0) < 0)
3524 err(EX_UNAVAILABLE, "setsockopt(IP_FW_RESETLOG)");
3525 if (!do_quiet)
3526 printf("Logging counts reset.\n");
3527
3528 return;
3529 }
3530
3531 while (ac) {
3532 /* Rule number */
3533 if (isdigit(**av)) {
3534 rulenum = atoi(*av);
3535 av++;
3536 ac--;
3537 if (setsockopt(s, IPPROTO_IP,
3538 IP_FW_RESETLOG, &rulenum, sizeof rulenum)) {
3539 warn("rule %u: setsockopt(IP_FW_RESETLOG)",
3540 rulenum);
3541 failed = EX_UNAVAILABLE;
3542 } else if (!do_quiet)
3543 printf("Entry %d logging count reset\n",
3544 rulenum);
3545 } else {
3546 errx(EX_DATAERR, "invalid rule number ``%s''", *av);
3547 }
3548 }
3549 if (failed != EX_OK)
3550 exit(failed);
3551 }
3552
3553 static void
3554 flush(void)
3555 {
3556 int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3557
3558 if (!do_force && !do_quiet) { /* need to ask user */
3559 int c;
3560
3561 printf("Are you sure? [yn] ");
3562 fflush(stdout);
3563 do {
3564 c = toupper(getc(stdin));
3565 while (c != '\n' && getc(stdin) != '\n')
3566 if (feof(stdin))
3567 return; /* and do not flush */
3568 } while (c != 'Y' && c != 'N');
3569 printf("\n");
3570 if (c == 'N') /* user said no */
3571 return;
3572 }
3573 if (setsockopt(s, IPPROTO_IP, cmd, NULL, 0) < 0)
3574 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3575 do_pipe ? "DUMMYNET" : "FW");
3576 if (!do_quiet)
3577 printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
3578 }
3579
3580 static void
3581 table_create(int ac, char **av)
3582 {
3583 struct ipfw_ioc_table tbl;
3584 char *eptr;
3585
3586 ac--;
3587 av++;
3588
3589 if (ac == 0)
3590 errx(EX_DATAERR, "missing table id");
3591
3592 memset(&tbl, 0, sizeof(tbl));
3593 tbl.tableid = strtoul(*av, &eptr, 0);
3594 if (*eptr != '\0')
3595 errx(EX_DATAERR, "invalid table id %s", *av);
3596 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_CREATE, &tbl, sizeof(tbl)) < 0)
3597 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_CREATE)");
3598 if (!do_quiet)
3599 printf("Created table %d\n", tbl.tableid);
3600 }
3601
3602 static void
3603 table_flush(int ac, char **av, int opt)
3604 {
3605 struct ipfw_ioc_table tbl;
3606 char *eptr;
3607
3608 ac--;
3609 av++;
3610
3611 memset(&tbl, 0, sizeof(tbl));
3612
3613 if (ac == 0) {
3614 if (opt == IP_FW_TBL_FLUSH) {
3615 /* Flush all tables */
3616 tbl.tableid = -1;
3617 goto flush;
3618 }
3619 errx(EX_DATAERR, "missing table id");
3620 }
3621
3622 tbl.tableid = strtoul(*av, &eptr, 0);
3623 if (*eptr != '\0')
3624 errx(EX_DATAERR, "invalid table id %s", *av);
3625
3626 flush:
3627 if (!do_force && !do_quiet) { /* need to ask user */
3628 int c;
3629
3630 printf("Are you sure? [yn] ");
3631 fflush(stdout);
3632 do {
3633 c = toupper(getc(stdin));
3634 while (c != '\n' && getc(stdin) != '\n')
3635 if (feof(stdin))
3636 return; /* and do not flush */
3637 } while (c != 'Y' && c != 'N');
3638 printf("\n");
3639 if (c == 'N') /* user said no */
3640 return;
3641 }
3642
3643 if (setsockopt(s, IPPROTO_IP, opt, &tbl, sizeof(tbl)) < 0) {
3644 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3645 opt == IP_FW_TBL_FLUSH ? "FLUSH" : "DESTROY");
3646 }
3647 if (!do_quiet) {
3648 if (tbl.tableid >= 0) {
3649 printf("%sed table %d\n",
3650 opt == IP_FW_TBL_FLUSH ? "Flush" : "Destroy",
3651 tbl.tableid);
3652 } else {
3653 printf("Flushed all tables\n");
3654 }
3655 }
3656 }
3657
3658 static void
3659 table_list(void)
3660 {
3661 struct ipfw_ioc_tbllist *list;
3662 int table_max, i;
3663 size_t len;
3664 socklen_t len1;
3665
3666 len = sizeof(table_max);
3667 if (sysctlbyname("net.inet.ip.fw.table_max", &table_max, &len,
3668 NULL, 0) < 0)
3669 err(EX_UNAVAILABLE, "sysctl net.inet.ip.fw.table_max failed");
3670
3671 len1 = __offsetof(struct ipfw_ioc_tbllist, tables[table_max]);
3672 list = malloc(len1);
3673 list->tableid = -1;
3674
3675 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, list, &len1) < 0)
3676 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3677
3678 for (i = 0; i < list->tablecnt; ++i)
3679 printf("%u\n", list->tables[i]);
3680 }
3681
3682 /* XXX copied from route(8) */
3683 static void
3684 inet_makenetandmask(in_addr_t net, struct sockaddr_in *in,
3685 struct sockaddr_in *in_mask, int bits)
3686 {
3687 in_addr_t addr, mask = 0;
3688 char *cp;
3689
3690 /*
3691 * XXX: This approach unable to handle 0.0.0.1/32 correctly
3692 * as inet_network() converts 0.0.0.1 and 1 equally.
3693 */
3694 if (net <= 0xff)
3695 addr = net << IN_CLASSA_NSHIFT;
3696 else if (net <= 0xffff)
3697 addr = net << IN_CLASSB_NSHIFT;
3698 else if (net <= 0xffffff)
3699 addr = net << IN_CLASSC_NSHIFT;
3700 else
3701 addr = net;
3702
3703 if (bits != 0)
3704 mask = 0xffffffff << (32 - bits);
3705 else if (net == 0)
3706 mask = 0;
3707 else if (IN_CLASSA(addr))
3708 mask = IN_CLASSA_NET;
3709 else if (IN_CLASSB(addr))
3710 mask = IN_CLASSB_NET;
3711 else if (IN_CLASSC(addr))
3712 mask = IN_CLASSC_NET;
3713 else if (IN_MULTICAST(addr))
3714 mask = IN_CLASSD_NET;
3715 else
3716 mask = 0xffffffff;
3717
3718 in->sin_family = AF_INET;
3719 in->sin_len = sizeof(struct sockaddr_in);
3720 in->sin_addr.s_addr = htonl(addr);
3721
3722 if (mask != 0xffffffff) {
3723 in_mask->sin_addr.s_addr = htonl(mask);
3724 cp = (char *)(&in_mask->sin_addr + 1);
3725 while (*--cp == 0 && cp > (char *)in_mask)
3726 ;
3727 in_mask->sin_len = 1 + cp - (char *)in_mask;
3728 }
3729 }
3730
3731 static void
3732 table_alt(int ac, char **av, int opt)
3733 {
3734 struct ipfw_ioc_tblcont ent;
3735 struct ipfw_ioc_tblent *te;
3736 char *eptr;
3737
3738 --ac;
3739 ++av;
3740 if (ac == 0)
3741 errx(EX_DATAERR, "missing table id");
3742
3743 memset(&ent, 0, sizeof(ent));
3744 ent.tableid = strtoul(*av, &eptr, 0);
3745 ent.entcnt = 1;
3746 te = &ent.ent[0];
3747 if (*eptr != '\0')
3748 errx(EX_DATAERR, "invalid table id %s", *av);
3749
3750 --ac;
3751 ++av;
3752 if (ac == 0)
3753 errx(EX_DATAERR, "missing addresses");
3754
3755 while (ac > 0) {
3756 char *q;
3757
3758 q = strchr(*av, '/');
3759 if (q != NULL) {
3760 in_addr_t val;
3761 int bits;
3762
3763 *q = '\0';
3764 val = inet_network(*av);
3765 *q = '/';
3766 if (val == INADDR_NONE) {
3767 fflush(stdout);
3768 errx(EX_DATAERR, "invalid address %s", *av);
3769 }
3770
3771 bits = strtoul(q + 1, &eptr, 0);
3772 if (*eptr != '\0') {
3773 fflush(stdout);
3774 errx(EX_DATAERR, "invalid address %s", *av);
3775 }
3776 inet_makenetandmask(val, &te->key, &te->netmask, bits);
3777 } else {
3778 int n;
3779
3780 n = inet_pton(AF_INET, *av, &te->key.sin_addr);
3781 if (n == 0) {
3782 fflush(stdout);
3783 errx(EX_DATAERR, "invalid address %s", *av);
3784 } else if (n < 0) {
3785 fflush(stdout);
3786 err(EX_UNAVAILABLE, "inet_pton failed");
3787 }
3788 te->key.sin_family = AF_INET;
3789 te->key.sin_len = sizeof(struct sockaddr_in);
3790 }
3791
3792 if (setsockopt(s, IPPROTO_IP, opt, &ent, sizeof(ent)) < 0) {
3793 if (opt == IP_FW_TBL_ADD && errno == EEXIST) {
3794 printf("Failed to add %s to table %d\n",
3795 *av, ent.tableid);
3796 } else if (opt == IP_FW_TBL_DEL && errno == ESRCH) {
3797 printf("Failed to delete %s from table %d\n",
3798 *av, ent.tableid);
3799 } else {
3800 fflush(stdout);
3801 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_%s)",
3802 opt == IP_FW_TBL_ADD ? "ADD" : "DEL");
3803 }
3804 } else if (!do_quiet) {
3805 printf("%sed %s %s table %d\n",
3806 opt == IP_FW_TBL_ADD ? "Add" : "Delet", *av,
3807 opt == IP_FW_TBL_ADD ? "to" : "from", ent.tableid);
3808 }
3809
3810 --ac;
3811 ++av;
3812 }
3813 }
3814
3815 static void
3816 table_show(int ac, char **av)
3817 {
3818 struct ipfw_ioc_tblcont *cont = NULL;
3819 int tableid, count = 128, i, uwidth = 0, lwidth = 0;
3820 char *eptr;
3821
3822 --ac;
3823 ++av;
3824 if (ac == 0)
3825 errx(EX_DATAERR, "missing table id");
3826
3827 tableid = strtoul(*av, &eptr, 0);
3828 if (*eptr != '\0')
3829 errx(EX_DATAERR, "invalid table id %s", *av);
3830
3831 for (;;) {
3832 socklen_t len;
3833
3834 len = __offsetof(struct ipfw_ioc_tblcont, ent[count]);
3835 cont = reallocf(cont, len);
3836 cont->tableid = tableid;
3837
3838 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_GET, cont, &len) < 0) {
3839 if (errno == E2BIG) {
3840 count *= 2;
3841 continue;
3842 }
3843 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_GET)");
3844 }
3845 break;
3846 }
3847 if (cont->entcnt == 0)
3848 return;
3849
3850 if (do_acct) {
3851 for (i = 0; i < cont->entcnt; ++i) {
3852 int width;
3853
3854 width = snprintf(NULL, 0, "%ju",
3855 (uintmax_t)cont->ent[i].use);
3856 if (width > uwidth)
3857 uwidth = width;
3858 }
3859 }
3860
3861 for (i = 0; i < cont->entcnt; ++i) {
3862 const struct ipfw_ioc_tblent *te = &cont->ent[i];
3863 char addr[INET_ADDRSTRLEN];
3864
3865 if (do_acct)
3866 printf("%*ju ", uwidth, (uintmax_t)te->use);
3867 if (do_time) {
3868 char timestr[30];
3869
3870 if (lwidth == 0) {
3871 time_t t0 = 0;
3872
3873 strcpy(timestr, ctime(&t0));
3874 *strchr(timestr, '\n') = '\0';
3875 lwidth = strlen(timestr);
3876 }
3877 if (te->last_used) {
3878 time_t t = _long_to_time(te->last_used);
3879
3880 strcpy(timestr, ctime(&t));
3881 *strchr(timestr, '\n') = '\0';
3882 printf("%s ", timestr);
3883 } else {
3884 printf("%*s ", lwidth, " ");
3885 }
3886 }
3887
3888 if (te->netmask.sin_len == 0) {
3889 printf("%s\n", inet_ntop(AF_INET,
3890 &te->key.sin_addr, addr, sizeof(addr)));
3891 } else {
3892 struct sockaddr_in mask;
3893 int b;
3894
3895 memset(&mask, 0, sizeof(mask));
3896 memcpy(&mask, &te->netmask,
3897 te->netmask.sin_len);
3898 b = ffs(ntohl(te->netmask.sin_addr.s_addr));
3899 b = 32 - (b - 1);
3900
3901 printf("%s/%d\n", inet_ntop(AF_INET,
3902 &te->key.sin_addr, addr, sizeof(addr)), b);
3903 }
3904 }
3905 }
3906
3907 static void
3908 table_zero(int ac, char **av)
3909 {
3910 struct ipfw_ioc_table tbl;
3911
3912 --ac;
3913 ++av;
3914
3915 memset(&tbl, 0, sizeof(tbl));
3916 if (ac == 0) {
3917 tbl.tableid = -1;
3918 } else {
3919 char *eptr;
3920
3921 tbl.tableid = strtoul(*av, &eptr, 0);
3922 if (*eptr != '\0')
3923 errx(EX_DATAERR, "invalid table id %s", *av);
3924 }
3925
3926 if (setsockopt(s, IPPROTO_IP, IP_FW_TBL_ZERO, &tbl, sizeof(tbl)) < 0)
3927 err(EX_UNAVAILABLE, "setsockopt(IP_FW_TBL_ZERO)");
3928 if (!do_quiet)
3929 printf("Accounting cleared\n");
3930 }
3931
3932 static void
3933 table_expire(int ac, char **av)
3934 {
3935 struct ipfw_ioc_tblexp tbl;
3936 char *eptr;
3937 socklen_t len;
3938
3939 --ac;
3940 ++av;
3941
3942 memset(&tbl, 0, sizeof(tbl));
3943 if (ac == 0) {
3944 errx(EX_DATAERR, "missing expire time");
3945 } else if (ac == 1) {
3946 tbl.tableid = -1;
3947 } else {
3948 tbl.tableid = strtoul(*av, &eptr, 0);
3949 if (*eptr != '\0')
3950 errx(EX_DATAERR, "invalid table id %s", *av);
3951 --ac;
3952 ++av;
3953 }
3954
3955 tbl.expire = strtoul(*av, &eptr, 0);
3956 if (*eptr != '\0')
3957 errx(EX_DATAERR, "invalid expire timeout %s", *av);
3958
3959 if (!do_force && !do_quiet) { /* need to ask user */
3960 int c;
3961
3962 printf("Are you sure? [yn] ");
3963 fflush(stdout);
3964 do {
3965 c = toupper(getc(stdin));
3966 while (c != '\n' && getc(stdin) != '\n')
3967 if (feof(stdin))
3968 return; /* and do not flush */
3969 } while (c != 'Y' && c != 'N');
3970 printf("\n");
3971 if (c == 'N') /* user said no */
3972 return;
3973 }
3974
3975 len = sizeof(tbl);
3976 if (getsockopt(s, IPPROTO_IP, IP_FW_TBL_EXPIRE, &tbl, &len) < 0)
3977 err(EX_UNAVAILABLE, "getsockopt(IP_FW_TBL_EXPIRE)");
3978 if (!do_quiet) {
3979 printf("Expired %d address%s\n", tbl.expcnt,
3980 (tbl.expcnt == 0 || tbl.expcnt > 1) ? "es" : "");
3981 }
3982 }
3983
3984 static int
3985 ipfw_main(int ac, char **av)
3986 {
3987 int ch;
3988
3989 if (ac == 1)
3990 show_usage();
3991
3992 /* Set the force flag for non-interactive processes */
3993 do_force = !isatty(STDIN_FILENO);
3994
3995 optind = optreset = 1;
3996 while ((ch = getopt(ac, av, "hs:acdefNqStv")) != -1)
3997 switch (ch) {
3998 case 'h': /* help */
3999 help();
4000 break; /* NOTREACHED */
4001
4002 case 's': /* sort */
4003 do_sort = atoi(optarg);
4004 break;
4005 case 'a':
4006 do_acct = 1;
4007 break;
4008 case 'c':
4009 do_compact = 1;
4010 break;
4011 case 'd':
4012 do_dynamic = 1;
4013 break;
4014 case 'e':
4015 do_expired = 1;
4016 break;
4017 case 'f':
4018 do_force = 1;
4019 break;
4020 case 'N':
4021 do_resolv = 1;
4022 break;
4023 case 'q':
4024 do_quiet = 1;
4025 break;
4026 case 'S':
4027 show_sets = 1;
4028 break;
4029 case 't':
4030 do_time = 1;
4031 break;
4032 case 'v': /* verbose */
4033 verbose++;
4034 break;
4035 default:
4036 show_usage();
4037 }
4038
4039 ac -= optind;
4040 av += optind;
4041 NEED1("bad arguments, for usage summary ``ipfw''");
4042
4043 /*
4044 * Reset do_pipe and do_table.
4045 */
4046 do_pipe = 0;
4047 do_table = 0;
4048
4049 /*
4050 * optional: pipe, queue or table
4051 */
4052 if (!strncmp(*av, "pipe", strlen(*av))) {
4053 do_pipe = 1;
4054 ac--;
4055 av++;
4056 } else if (!strncmp(*av, "queue", strlen(*av))) {
4057 do_pipe = 2;
4058 ac--;
4059 av++;
4060 } else if (!strncmp(*av, "table", strlen(*av))) {
4061 do_table = 1;
4062 ac--;
4063 av++;
4064 }
4065 NEED1("missing command");
4066
4067 /*
4068 * for pipes, queues and table we normally say 'pipe NN config'
4069 * but the code is easier to parse as 'pipe config NN' so we
4070 * swap the two arguments.
4071 */
4072 if ((do_pipe > 0 || do_table > 0) && ac > 1 &&
4073 *av[0] >= '0' && *av[0] <= '9') {
4074 char *p = av[0];
4075 av[0] = av[1];
4076 av[1] = p;
4077 }
4078 if (do_table) {
4079 if (!strncmp(*av, "create", strlen(*av)))
4080 table_create(ac, av);
4081 else if (!strncmp(*av, "destroy", strlen(*av)))
4082 table_flush(ac, av, IP_FW_TBL_DESTROY);
4083 else if (!strncmp(*av, "list", strlen(*av)))
4084 table_list();
4085 else if (!strncmp(*av, "add", strlen(*av)))
4086 table_alt(ac, av, IP_FW_TBL_ADD);
4087 else if (!strncmp(*av, "delete", strlen(*av)))
4088 table_alt(ac, av, IP_FW_TBL_DEL);
4089 else if (!strncmp(*av, "flush", strlen(*av)))
4090 table_flush(ac, av, IP_FW_TBL_FLUSH);
4091 else if (!strncmp(*av, "print", strlen(*av)))
4092 table_show(ac, av);
4093 else if (!strncmp(*av, "show", strlen(*av))) {
4094 do_acct++;
4095 table_show(ac, av);
4096 } else if (!strncmp(*av, "zero", strlen(*av)))
4097 table_zero(ac, av);
4098 else if (!strncmp(*av, "expire", strlen(*av)))
4099 table_expire(ac, av);
4100 else
4101 errx(EX_USAGE, "bad command `%s'", *av);
4102 return 0;
4103 }
4104 if (!strncmp(*av, "add", strlen(*av)))
4105 add(ac, av);
4106 else if (do_pipe && !strncmp(*av, "config", strlen(*av)))
4107 config_pipe(ac, av);
4108 else if (!strncmp(*av, "delete", strlen(*av)))
4109 delete(ac, av);
4110 else if (!strncmp(*av, "flush", strlen(*av)))
4111 flush();
4112 else if (!strncmp(*av, "zero", strlen(*av)))
4113 zero(ac, av);
4114 else if (!strncmp(*av, "resetlog", strlen(*av)))
4115 resetlog(ac, av);
4116 else if (!strncmp(*av, "print", strlen(*av)) ||
4117 !strncmp(*av, "list", strlen(*av)))
4118 list(ac, av);
4119 else if (!strncmp(*av, "enable", strlen(*av)))
4120 sysctl_handler(ac, av, 1);
4121 else if (!strncmp(*av, "disable", strlen(*av)))
4122 sysctl_handler(ac, av, 0);
4123 else if (!strncmp(*av, "set", strlen(*av)))
4124 sets_handler(ac, av);
4125 else if (!strncmp(*av, "show", strlen(*av))) {
4126 do_acct++;
4127 list(ac, av);
4128 } else
4129 errx(EX_USAGE, "bad command `%s'", *av);
4130 return 0;
4131 }
4132
4133
4134 static void
4135 ipfw_readfile(int ac, char *av[])
4136 {
4137 #define MAX_ARGS 32
4138 #define WHITESP " \t\f\v\n\r"
4139 char buf[BUFSIZ];
4140 char *a, *p, *args[MAX_ARGS], *cmd = NULL;
4141 char linename[20];
4142 int i=0, lineno=0, qflag=0, pflag=0, status;
4143 FILE *f = NULL;
4144 pid_t preproc = 0;
4145 int c;
4146
4147 while ((c = getopt(ac, av, "D:U:p:q")) != -1)
4148 switch(c) {
4149 case 'D':
4150 if (!pflag)
4151 errx(EX_USAGE, "-D requires -p");
4152 if (i > MAX_ARGS - 2)
4153 errx(EX_USAGE,
4154 "too many -D or -U options");
4155 args[i++] = __DECONST(char *, "-D");
4156 args[i++] = optarg;
4157 break;
4158
4159 case 'U':
4160 if (!pflag)
4161 errx(EX_USAGE, "-U requires -p");
4162 if (i > MAX_ARGS - 2)
4163 errx(EX_USAGE,
4164 "too many -D or -U options");
4165 args[i++] = __DECONST(char *, "-U");
4166 args[i++] = optarg;
4167 break;
4168
4169 case 'p':
4170 pflag = 1;
4171 cmd = optarg;
4172 args[0] = cmd;
4173 i = 1;
4174 break;
4175
4176 case 'q':
4177 qflag = 1;
4178 break;
4179
4180 default:
4181 errx(EX_USAGE, "bad arguments, for usage"
4182 " summary ``ipfw''");
4183 }
4184
4185 av += optind;
4186 ac -= optind;
4187 if (ac != 1)
4188 errx(EX_USAGE, "extraneous filename arguments");
4189
4190 if ((f = fopen(av[0], "r")) == NULL)
4191 err(EX_UNAVAILABLE, "fopen: %s", av[0]);
4192
4193 if (pflag) {
4194 /* pipe through preprocessor (cpp or m4) */
4195 int pipedes[2];
4196
4197 args[i] = NULL;
4198
4199 if (pipe(pipedes) == -1)
4200 err(EX_OSERR, "cannot create pipe");
4201
4202 switch((preproc = fork())) {
4203 case -1:
4204 err(EX_OSERR, "cannot fork");
4205
4206 case 0:
4207 /* child */
4208 if (dup2(fileno(f), 0) == -1
4209 || dup2(pipedes[1], 1) == -1)
4210 err(EX_OSERR, "dup2()");
4211 fclose(f);
4212 close(pipedes[1]);
4213 close(pipedes[0]);
4214 execvp(cmd, args);
4215 err(EX_OSERR, "execvp(%s) failed", cmd);
4216
4217 default:
4218 /* parent */
4219 fclose(f);
4220 close(pipedes[1]);
4221 if ((f = fdopen(pipedes[0], "r")) == NULL) {
4222 int savederrno = errno;
4223
4224 kill(preproc, SIGTERM);
4225 errno = savederrno;
4226 err(EX_OSERR, "fdopen()");
4227 }
4228 }
4229 }
4230
4231 while (fgets(buf, BUFSIZ, f)) {
4232 lineno++;
4233 snprintf(linename, sizeof(linename), "Line %d", lineno);
4234 args[0] = linename;
4235
4236 if (*buf == '#')
4237 continue;
4238 if ((p = strchr(buf, '#')) != NULL)
4239 *p = '\0';
4240 i = 1;
4241 if (qflag)
4242 args[i++] = __DECONST(char *, "-q");
4243 for (a = strtok(buf, WHITESP);
4244 a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++)
4245 args[i] = a;
4246 if (i == (qflag? 2: 1))
4247 continue;
4248 if (i == MAX_ARGS)
4249 errx(EX_USAGE, "%s: too many arguments",
4250 linename);
4251 args[i] = NULL;
4252
4253 ipfw_main(i, args);
4254 }
4255 fclose(f);
4256 if (pflag) {
4257 if (waitpid(preproc, &status, 0) == -1)
4258 errx(EX_OSERR, "waitpid()");
4259 if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK)
4260 errx(EX_UNAVAILABLE,
4261 "preprocessor exited with status %d",
4262 WEXITSTATUS(status));
4263 else if (WIFSIGNALED(status))
4264 errx(EX_UNAVAILABLE,
4265 "preprocessor exited with signal %d",
4266 WTERMSIG(status));
4267 }
4268 }
4269
4270 int
4271 main(int ac, char *av[])
4272 {
4273 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
4274 if (s < 0)
4275 err(EX_UNAVAILABLE, "socket");
4276
4277 /*
4278 * If the last argument is an absolute pathname, interpret it
4279 * as a file to be preprocessed.
4280 */
4281
4282 if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
4283 ipfw_readfile(ac, av);
4284 else
4285 ipfw_main(ac, av);
4286 return EX_OK;
4287 }
DragonFly BSD