2 * Copyright (c) 2002-2003 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
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.
16 * This software is provided ``AS IS'' without any warranties of any kind.
18 * NEW command line interface for IP firewall facility
23 #include <sys/types.h>
24 #include <sys/param.h>
25 #include <sys/socket.h>
26 #include <sys/sockio.h>
27 #include <sys/sysctl.h>
44 #include <time.h> /* ctime */
45 #include <timeconv.h> /* _long_to_time */
48 #include <stddef.h> /* offsetof */
50 #include <net/ethernet.h>
51 #include <net/if.h> /* only IFNAMSIZ */
52 #include <netinet/in.h>
53 #include <netinet/in_systm.h> /* only n_short, n_long */
54 #include <netinet/ip.h>
55 #include <netinet/ip_icmp.h>
56 #include <netinet/ip_fw.h>
57 #include <netinet/tcp.h>
58 #include <arpa/inet.h>
60 struct cmdline_opts co; /* global options */
66 int show_time; /* show timestamp */
67 uint32_t set_mask; /* enabled sets mask */
68 uint32_t flags; /* request flags */
69 uint32_t first; /* first rule to request */
70 uint32_t last; /* last rule to request */
71 uint32_t dcnt; /* number of dynamic states */
72 ipfw_obj_ctlv *tstate; /* table state data */
75 int resvd_set_number = RESVD_SET;
79 #define CHECK_LENGTH(v, len) do { \
81 errx(EX_DATAERR, "Rule too long"); \
84 * Check if we have enough space in cmd buffer. Note that since
85 * first 8? u32 words are reserved by reserved header, full cmd
86 * buffer can't be used, so we need to protect from buffer overrun
87 * only. At the beginning, cblen is less than actual buffer size by
88 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
89 * for checking small instructions fitting in given range.
90 * We also (ab)use the fact that ipfw_insn is always the first field
91 * for any custom instruction.
93 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
95 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
97 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
98 if (_substrcmp(*av, "tablearg") == 0) { \
107 _xval = strtol(*av, &end, 10); \
109 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
110 errx(EX_DATAERR, "%s: invalid argument: %s", \
111 match_value(s_x, tok), *av); \
113 if (errno == ERANGE || _xval < min || _xval > max) \
114 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
115 match_value(s_x, tok), min, max, *av); \
117 if (_xval == IP_FW_TARG) \
118 errx(EX_DATAERR, "%s: illegal argument value: %s", \
119 match_value(s_x, tok), *av); \
124 static struct _s_x f_tcpflags[] = {
135 static struct _s_x f_tcpopts[] = {
136 { "mss", IP_FW_TCPOPT_MSS },
137 { "maxseg", IP_FW_TCPOPT_MSS },
138 { "window", IP_FW_TCPOPT_WINDOW },
139 { "sack", IP_FW_TCPOPT_SACK },
140 { "ts", IP_FW_TCPOPT_TS },
141 { "timestamp", IP_FW_TCPOPT_TS },
142 { "cc", IP_FW_TCPOPT_CC },
148 * IP options span the range 0 to 255 so we need to remap them
149 * (though in fact only the low 5 bits are significant).
151 static struct _s_x f_ipopts[] = {
152 { "ssrr", IP_FW_IPOPT_SSRR},
153 { "lsrr", IP_FW_IPOPT_LSRR},
154 { "rr", IP_FW_IPOPT_RR},
155 { "ts", IP_FW_IPOPT_TS},
160 static struct _s_x f_iptos[] = {
161 { "lowdelay", IPTOS_LOWDELAY},
162 { "throughput", IPTOS_THROUGHPUT},
163 { "reliability", IPTOS_RELIABILITY},
164 { "mincost", IPTOS_MINCOST},
165 { "congestion", IPTOS_ECN_CE},
166 { "ecntransport", IPTOS_ECN_ECT0},
167 { "ip tos option", 0},
171 struct _s_x f_ipdscp[] = {
172 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */
173 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */
174 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */
175 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */
176 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */
177 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */
178 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */
179 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */
180 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */
181 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */
182 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */
183 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */
184 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
185 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */
186 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
187 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
188 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
189 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
190 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
191 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
192 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
193 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
197 static struct _s_x limit_masks[] = {
198 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
199 {"src-addr", DYN_SRC_ADDR},
200 {"src-port", DYN_SRC_PORT},
201 {"dst-addr", DYN_DST_ADDR},
202 {"dst-port", DYN_DST_PORT},
207 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
208 * This is only used in this code.
210 #define IPPROTO_ETHERTYPE 0x1000
211 static struct _s_x ether_types[] = {
213 * Note, we cannot use "-:&/" in the names because they are field
214 * separators in the type specifications. Also, we use s = NULL as
215 * end-delimiter, because a type of 0 can be legal.
228 { "pppoe_disc", 0x8863 },
229 { "pppoe_sess", 0x8864 },
230 { "ipx_8022", 0x00E0 },
231 { "ipx_8023", 0x0000 },
232 { "ipx_ii", 0x8137 },
233 { "ipx_snap", 0x8137 },
239 static struct _s_x rule_eactions[] = {
240 { "nat64lsn", TOK_NAT64LSN },
241 { "nat64stl", TOK_NAT64STL },
242 { "nptv6", TOK_NPTV6 },
243 { "tcp-setmss", TOK_TCPSETMSS },
244 { NULL, 0 } /* terminator */
247 static struct _s_x rule_actions[] = {
248 { "abort6", TOK_ABORT6 },
249 { "abort", TOK_ABORT },
250 { "accept", TOK_ACCEPT },
251 { "pass", TOK_ACCEPT },
252 { "allow", TOK_ACCEPT },
253 { "permit", TOK_ACCEPT },
254 { "count", TOK_COUNT },
255 { "pipe", TOK_PIPE },
256 { "queue", TOK_QUEUE },
257 { "divert", TOK_DIVERT },
259 { "netgraph", TOK_NETGRAPH },
260 { "ngtee", TOK_NGTEE },
261 { "fwd", TOK_FORWARD },
262 { "forward", TOK_FORWARD },
263 { "skipto", TOK_SKIPTO },
264 { "deny", TOK_DENY },
265 { "drop", TOK_DENY },
266 { "reject", TOK_REJECT },
267 { "reset6", TOK_RESET6 },
268 { "reset", TOK_RESET },
269 { "unreach6", TOK_UNREACH6 },
270 { "unreach", TOK_UNREACH },
271 { "check-state", TOK_CHECKSTATE },
272 { "//", TOK_COMMENT },
274 { "reass", TOK_REASS },
275 { "setfib", TOK_SETFIB },
276 { "setdscp", TOK_SETDSCP },
277 { "call", TOK_CALL },
278 { "return", TOK_RETURN },
279 { "eaction", TOK_EACTION },
280 { "tcp-setmss", TOK_TCPSETMSS },
281 { NULL, 0 } /* terminator */
284 static struct _s_x rule_action_params[] = {
285 { "altq", TOK_ALTQ },
288 { "untag", TOK_UNTAG },
289 { NULL, 0 } /* terminator */
293 * The 'lookup' instruction accepts one of the following arguments.
294 * -1 is a terminator for the list.
295 * Arguments are passed as v[1] in O_DST_LOOKUP options.
297 static int lookup_key[] = {
298 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
299 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
301 static struct _s_x rule_options[] = {
302 { "tagged", TOK_TAGGED },
305 { "jail", TOK_JAIL },
307 { "limit", TOK_LIMIT },
308 { "set-limit", TOK_SETLIMIT },
309 { "keep-state", TOK_KEEPSTATE },
310 { "record-state", TOK_RECORDSTATE },
311 { "bridged", TOK_LAYER2 },
312 { "layer2", TOK_LAYER2 },
314 { "diverted", TOK_DIVERTED },
315 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
316 { "diverted-output", TOK_DIVERTEDOUTPUT },
317 { "xmit", TOK_XMIT },
318 { "recv", TOK_RECV },
320 { "fragment", TOK_FRAG },
321 { "frag", TOK_FRAG },
323 { "ipoptions", TOK_IPOPTS },
324 { "ipopts", TOK_IPOPTS },
325 { "iplen", TOK_IPLEN },
326 { "ipid", TOK_IPID },
327 { "ipprecedence", TOK_IPPRECEDENCE },
328 { "dscp", TOK_DSCP },
329 { "iptos", TOK_IPTOS },
330 { "ipttl", TOK_IPTTL },
331 { "ipversion", TOK_IPVER },
332 { "ipver", TOK_IPVER },
333 { "estab", TOK_ESTAB },
334 { "established", TOK_ESTAB },
335 { "setup", TOK_SETUP },
336 { "sockarg", TOK_SOCKARG },
337 { "tcpdatalen", TOK_TCPDATALEN },
338 { "tcpflags", TOK_TCPFLAGS },
339 { "tcpflgs", TOK_TCPFLAGS },
340 { "tcpoptions", TOK_TCPOPTS },
341 { "tcpopts", TOK_TCPOPTS },
342 { "tcpseq", TOK_TCPSEQ },
343 { "tcpack", TOK_TCPACK },
344 { "tcpwin", TOK_TCPWIN },
345 { "icmptype", TOK_ICMPTYPES },
346 { "icmptypes", TOK_ICMPTYPES },
347 { "dst-ip", TOK_DSTIP },
348 { "src-ip", TOK_SRCIP },
349 { "dst-port", TOK_DSTPORT },
350 { "src-port", TOK_SRCPORT },
351 { "proto", TOK_PROTO },
354 { "mac-type", TOK_MACTYPE },
355 { "verrevpath", TOK_VERREVPATH },
356 { "versrcreach", TOK_VERSRCREACH },
357 { "antispoof", TOK_ANTISPOOF },
358 { "ipsec", TOK_IPSEC },
359 { "icmp6type", TOK_ICMP6TYPES },
360 { "icmp6types", TOK_ICMP6TYPES },
361 { "ext6hdr", TOK_EXT6HDR},
362 { "flow-id", TOK_FLOWID},
367 { "dst-ipv6", TOK_DSTIP6},
368 { "dst-ip6", TOK_DSTIP6},
369 { "src-ipv6", TOK_SRCIP6},
370 { "src-ip6", TOK_SRCIP6},
371 { "lookup", TOK_LOOKUP},
373 { "defer-action", TOK_SKIPACTION },
374 { "defer-immediate-action", TOK_SKIPACTION },
375 { "//", TOK_COMMENT },
377 { "not", TOK_NOT }, /* pseudo option */
378 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
379 { "or", TOK_OR }, /* pseudo option */
380 { "|", /* escape */ TOK_OR }, /* pseudo option */
381 { "{", TOK_STARTBRACE }, /* pseudo option */
382 { "(", TOK_STARTBRACE }, /* pseudo option */
383 { "}", TOK_ENDBRACE }, /* pseudo option */
384 { ")", TOK_ENDBRACE }, /* pseudo option */
385 { NULL, 0 } /* terminator */
388 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
389 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
390 ipfw_cfg_lheader **pcfg, size_t *psize);
391 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
392 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
393 static void ipfw_list_tifaces(void);
396 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
397 static uint16_t pack_table(struct tidx *tstate, char *name);
399 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
400 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
401 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
405 * Simple string buffer API.
406 * Used to simplify buffer passing between function and for
407 * transparent overrun handling.
411 * Allocates new buffer of given size @sz.
413 * Returns 0 on success.
416 bp_alloc(struct buf_pr *b, size_t size)
418 memset(b, 0, sizeof(struct buf_pr));
420 if ((b->buf = calloc(1, size)) == NULL)
431 bp_free(struct buf_pr *b)
438 * Flushes buffer so new writer start from beginning.
441 bp_flush(struct buf_pr *b)
450 * Print message specified by @format and args.
451 * Automatically manage buffer space and transparently handle
454 * Returns number of bytes that should have been printed.
457 bprintf(struct buf_pr *b, char *format, ...)
462 va_start(args, format);
464 i = vsnprintf(b->ptr, b->avail, format, args);
467 if (i > b->avail || i < 0) {
468 /* Overflow or print error */
481 * Special values printer for tablearg-aware opcodes.
484 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
488 bprintf(bp, "%s", str);
489 if (arg == IP_FW_TARG)
490 bprintf(bp, "tablearg");
492 bprintf(bp, "%u", arg);
496 * Helper routine to print a possibly unaligned uint64_t on
497 * various platform. If width > 0, print the value with
498 * the desired width, followed by a space;
499 * otherwise, return the required width.
502 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
505 #define U64_FMT "I64"
507 #define U64_FMT "llu"
510 unsigned long long d;
512 bcopy (pd, &u, sizeof(u));
515 bprintf(b, "%*" U64_FMT " ", width, d) :
516 snprintf(NULL, 0, "%" U64_FMT, d) ;
522 safe_calloc(size_t number, size_t size)
524 void *ret = calloc(number, size);
527 err(EX_OSERR, "calloc");
532 safe_realloc(void *ptr, size_t size)
534 void *ret = realloc(ptr, size);
537 err(EX_OSERR, "realloc");
542 * Compare things like interface or table names.
545 stringnum_cmp(const char *a, const char *b)
557 return (strcmp(a, b));
562 * conditionally runs the command.
563 * Selected options or negative -> getsockopt
566 do_cmd(int optname, void *optval, uintptr_t optlen)
573 if (ipfw_socket == -1)
574 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
576 err(EX_UNAVAILABLE, "socket");
578 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
579 optname == IP_FW_ADD || optname == IP_FW3 ||
580 optname == IP_FW_NAT_GET_CONFIG ||
582 optname == IP_FW_NAT_GET_LOG) {
585 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
586 (socklen_t *)optlen);
588 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
594 * do_set3 - pass ipfw control cmd to kernel
595 * @optname: option name
596 * @optval: pointer to option data
597 * @optlen: option length
599 * Assumes op3 header is already embedded.
600 * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
601 * Returns 0 on success or errno otherwise.
604 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
610 if (ipfw_socket == -1)
611 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
613 err(EX_UNAVAILABLE, "socket");
615 op3->opcode = optname;
617 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
621 * do_get3 - pass ipfw control cmd to kernel
622 * @optname: option name
623 * @optval: pointer to option data
624 * @optlen: pointer to option length
626 * Assumes op3 header is already embedded.
627 * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
628 * Returns 0 on success or errno otherwise.
631 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
639 if (ipfw_socket == -1)
640 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
642 err(EX_UNAVAILABLE, "socket");
644 op3->opcode = optname;
647 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
654 * match_token takes a table and a string, returns the value associated
655 * with the string (-1 in case of failure).
658 match_token(struct _s_x *table, const char *string)
661 uint i = strlen(string);
663 for (pt = table ; i && pt->s != NULL ; pt++)
664 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
670 * match_token_relaxed takes a table and a string, returns the value associated
671 * with the string for the best match.
674 * value from @table for matched records
675 * -1 for non-matched records
676 * -2 if more than one records match @string.
679 match_token_relaxed(struct _s_x *table, const char *string)
687 for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
688 if (strncmp(pt->s, string, i) != 0)
697 return (c > 0 ? -2: -1);
701 get_token(struct _s_x *table, const char *string, const char *errbase)
705 if ((tcmd = match_token_relaxed(table, string)) < 0)
706 errx(EX_USAGE, "%s %s %s",
707 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
713 * match_value takes a table and a value, returns the string associated
714 * with the value (NULL in case of failure).
717 match_value(struct _s_x *p, int value)
719 for (; p->s != NULL; p++)
726 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
732 for (sz = 0, pt = table ; pt->s != NULL; pt++) {
733 l = snprintf(buf + sz, bufsize - sz, "%s%s",
734 (sz == 0) ? "" : delimiter, pt->s);
745 * helper function to process a set of flags and set bits in the
749 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
752 char *q; /* points to the separator */
754 uint32_t *which; /* mask we are working on */
765 val = match_token(flags, p);
771 *which |= (uint32_t)val;
778 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
780 char const *comma = "";
783 for (i = 0; list[i].x != 0; i++) {
784 if ((set & list[i].x) == 0)
788 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
798 * _substrcmp takes two strings and returns 1 if they do not match,
799 * and 0 if they match exactly or the first string is a sub-string
800 * of the second. A warning is printed to stderr in the case that the
801 * first string is a sub-string of the second.
803 * This function will be removed in the future through the usual
804 * deprecation process.
807 _substrcmp(const char *str1, const char* str2)
810 if (strncmp(str1, str2, strlen(str1)) != 0)
813 if (strlen(str1) != strlen(str2))
814 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
820 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
821 * and 0 if they match exactly or the second string is a sub-string
822 * of the first. A warning is printed to stderr in the case that the
823 * first string does not match the third.
825 * This function exists to warn about the bizarre construction
826 * strncmp(str, "by", 2) which is used to allow people to use a shortcut
827 * for "bytes". The problem is that in addition to accepting "by",
828 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
829 * other string beginning with "by".
831 * This function will be removed in the future through the usual
832 * deprecation process.
835 _substrcmp2(const char *str1, const char* str2, const char* str3)
838 if (strncmp(str1, str2, strlen(str2)) != 0)
841 if (strcmp(str1, str3) != 0)
842 warnx("DEPRECATED: '%s' matched '%s'",
848 * prints one port, symbolic or numeric
851 print_port(struct buf_pr *bp, int proto, uint16_t port)
854 if (proto == IPPROTO_ETHERTYPE) {
857 if (co.do_resolv && (s = match_value(ether_types, port)) )
858 bprintf(bp, "%s", s);
860 bprintf(bp, "0x%04x", port);
862 struct servent *se = NULL;
864 struct protoent *pe = getprotobynumber(proto);
866 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
869 bprintf(bp, "%s", se->s_name);
871 bprintf(bp, "%d", port);
875 static struct _s_x _port_name[] = {
876 {"dst-port", O_IP_DSTPORT},
877 {"src-port", O_IP_SRCPORT},
881 {"mac-type", O_MAC_TYPE},
882 {"tcpdatalen", O_TCPDATALEN},
883 {"tcpwin", O_TCPWIN},
884 {"tagged", O_TAGGED},
889 * Print the values in a list 16-bit items of the types above.
890 * XXX todo: add support for mask.
893 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
895 uint16_t *p = cmd->ports;
900 sep = match_value(_port_name, opcode);
903 bprintf(bp, " %s", sep);
906 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
907 bprintf(bp, "%s", sep);
908 print_port(bp, proto, p[0]);
911 print_port(bp, proto, p[1]);
918 * Like strtol, but also translates service names into port numbers
919 * for some protocols.
921 * proto == -1 disables the protocol check;
922 * proto == IPPROTO_ETHERTYPE looks up an internal table
923 * proto == <some value in /etc/protocols> matches the values there.
924 * Returns *end == s in case the parameter is not found.
927 strtoport(char *s, char **end, int base, int proto)
933 *end = s; /* default - not found */
935 return 0; /* not found */
938 return strtol(s, end, base);
941 * find separator. '\\' escapes the next char.
943 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
944 if (*s1 == '\\' && s1[1] != '\0')
947 buf = safe_calloc(s1 - s + 1, 1);
950 * copy into a buffer skipping backslashes
952 for (p = s, i = 0; p != s1 ; p++)
957 if (proto == IPPROTO_ETHERTYPE) {
958 i = match_token(ether_types, buf);
960 if (i != -1) { /* found */
965 struct protoent *pe = NULL;
969 pe = getprotobynumber(proto);
971 se = getservbyname(buf, pe ? pe->p_name : NULL);
975 return ntohs(se->s_port);
978 return 0; /* not found */
982 * Fill the body of the command with the list of port ranges.
985 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
987 uint16_t a, b, *p = cmd->ports;
992 a = strtoport(av, &s, 0, proto);
993 if (s == av) /* empty or invalid argument */
996 CHECK_LENGTH(cblen, i + 2);
999 case '-': /* a range */
1001 b = strtoport(av, &s, 0, proto);
1002 /* Reject expressions like '1-abc' or '1-2-3'. */
1003 if (s == av || (*s != ',' && *s != '\0'))
1008 case ',': /* comma separated list */
1013 warnx("port list: invalid separator <%c> in <%s>",
1023 if (i + 1 > F_LEN_MASK)
1024 errx(EX_DATAERR, "too many ports/ranges\n");
1025 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
1031 * Fill the body of the command with the list of DiffServ codepoints.
1034 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1036 uint32_t *low, *high;
1040 cmd->opcode = O_DSCP;
1041 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1045 low = (uint32_t *)(cmd + 1);
1058 if ((code = match_token(f_ipdscp, s)) == -1)
1059 errx(EX_DATAERR, "Unknown DSCP code");
1061 code = strtoul(s, NULL, 10);
1062 if (code < 0 || code > 63)
1063 errx(EX_DATAERR, "Invalid DSCP value");
1067 *high |= 1 << (code - 32);
1075 static struct _s_x icmpcodes[] = {
1076 { "net", ICMP_UNREACH_NET },
1077 { "host", ICMP_UNREACH_HOST },
1078 { "protocol", ICMP_UNREACH_PROTOCOL },
1079 { "port", ICMP_UNREACH_PORT },
1080 { "needfrag", ICMP_UNREACH_NEEDFRAG },
1081 { "srcfail", ICMP_UNREACH_SRCFAIL },
1082 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
1083 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
1084 { "isolated", ICMP_UNREACH_ISOLATED },
1085 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
1086 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
1087 { "tosnet", ICMP_UNREACH_TOSNET },
1088 { "toshost", ICMP_UNREACH_TOSHOST },
1089 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
1090 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
1091 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
1096 fill_reject_code(u_short *codep, char *str)
1101 val = strtoul(str, &s, 0);
1102 if (s == str || *s != '\0' || val >= 0x100)
1103 val = match_token(icmpcodes, str);
1105 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1111 print_reject_code(struct buf_pr *bp, uint16_t code)
1115 if ((s = match_value(icmpcodes, code)) != NULL)
1116 bprintf(bp, "unreach %s", s);
1118 bprintf(bp, "unreach %u", code);
1122 * Returns the number of bits set (from left) in a contiguous bitmask,
1123 * or -1 if the mask is not contiguous.
1124 * XXX this needs a proper fix.
1125 * This effectively works on masks in big-endian (network) format.
1126 * when compiled on little endian architectures.
1128 * First bit is bit 7 of the first byte -- note, for MAC addresses,
1129 * the first bit on the wire is bit 0 of the first byte.
1130 * len is the max length in bits.
1133 contigmask(uint8_t *p, int len)
1137 for (i=0; i<len ; i++)
1138 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1140 for (n=i+1; n < len; n++)
1141 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1142 return -1; /* mask not contiguous */
1147 * print flags set/clear in the two bitmasks passed as parameters.
1148 * There is a specialized check for f_tcpflags.
1151 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1154 char const *comma = "";
1156 uint8_t set = cmd->arg1 & 0xff;
1157 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1159 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1160 bprintf(bp, " setup");
1164 bprintf(bp, " %s ", name);
1165 for (i=0; list[i].x != 0; i++) {
1166 if (set & list[i].x) {
1168 bprintf(bp, "%s%s", comma, list[i].s);
1171 if (clear & list[i].x) {
1172 clear &= ~list[i].x;
1173 bprintf(bp, "%s!%s", comma, list[i].s);
1181 * Print the ip address contained in a command.
1184 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1186 struct hostent *he = NULL;
1188 uint32_t len = F_LEN((ipfw_insn *)cmd);
1189 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1193 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1195 const char *arg = "<invalid>";
1197 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1198 arg = match_value(rule_options, lookup_key[d]);
1199 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1200 bprintf(bp, "lookup %s %s", arg, t);
1203 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1207 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1208 cmd->o.opcode == O_IP_DST_LOOKUP) {
1209 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1210 bprintf(bp, "table(%s", t);
1211 if (len == F_INSN_SIZE(ipfw_insn_u32))
1212 bprintf(bp, ",%u", *a);
1216 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1217 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1221 x = cmd->o.arg1 - 1;
1223 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1224 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1225 contigmask((uint8_t *)&x, 32));
1226 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1227 x &= 0xff; /* base */
1229 * Print bits and ranges.
1230 * Locate first bit set (i), then locate first bit unset (j).
1231 * If we have 3+ consecutive bits set, then print them as a
1232 * range, otherwise only print the initial bit and rescan.
1234 for (i=0; i < cmd->o.arg1; i++)
1235 if (map[i/32] & (1<<(i & 31))) {
1236 for (j=i+1; j < cmd->o.arg1; j++)
1237 if (!(map[ j/32] & (1<<(j & 31))))
1239 bprintf(bp, "%c%d", comma, i+x);
1240 if (j>i+2) { /* range has at least 3 elements */
1241 bprintf(bp, "-%d", j-1+x);
1250 * len == 2 indicates a single IP, whereas lists of 1 or more
1251 * addr/mask pairs have len = (2n+1). We convert len to n so we
1252 * use that to count the number of entries.
1254 for (len = len / 2; len > 0; len--, a += 2) {
1255 int mb = /* mask length */
1256 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1257 32 : contigmask((uint8_t *)&(a[1]), 32);
1258 if (mb == 32 && co.do_resolv)
1259 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1260 if (he != NULL) /* resolved to name */
1261 bprintf(bp, "%s", he->h_name);
1262 else if (mb == 0) /* any */
1264 else { /* numeric IP followed by some kind of mask */
1265 ia = (struct in_addr *)&a[0];
1266 bprintf(bp, "%s", inet_ntoa(*ia));
1268 ia = (struct in_addr *)&a[1];
1269 bprintf(bp, ":%s", inet_ntoa(*ia));
1271 bprintf(bp, "/%d", mb);
1279 * prints a MAC address/mask pair
1282 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1284 int l = contigmask(mask, 48);
1287 bprintf(bp, " any");
1289 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1290 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1292 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1293 mask[0], mask[1], mask[2],
1294 mask[3], mask[4], mask[5]);
1296 bprintf(bp, "/%d", l);
1301 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1304 bprintf(bp, " MAC");
1305 format_mac(bp, mac->addr, mac->mask);
1306 format_mac(bp, mac->addr + 6, mac->mask + 6);
1310 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1319 type = strtoul(av, &av, 0);
1321 if (*av != ',' && *av != '\0')
1322 errx(EX_DATAERR, "invalid ICMP type");
1325 errx(EX_DATAERR, "ICMP type out of range");
1327 cmd->d[0] |= 1 << type;
1329 cmd->o.opcode = O_ICMPTYPE;
1330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1334 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1339 bprintf(bp, " icmptypes");
1340 for (i = 0; i < 32; i++) {
1341 if ( (cmd->d[0] & (1 << (i))) == 0)
1343 bprintf(bp, "%c%d", sep, i);
1349 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1356 bprintf(bp, " dscp");
1359 if (*v & (1 << i)) {
1360 if ((code = match_value(f_ipdscp, i)) != NULL)
1361 bprintf(bp, "%c%s", sep, code);
1363 bprintf(bp, "%c%d", sep, i);
1367 if ((++i % 32) == 0)
1372 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd))
1374 struct ip_fw_rule *rule;
1375 const ipfw_insn *eaction;
1378 #define HAVE_PROTO 0x0001
1379 #define HAVE_SRCIP 0x0002
1380 #define HAVE_DSTIP 0x0004
1381 #define HAVE_PROBE_STATE 0x0008
1387 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1390 state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1391 if (state->printed == NULL)
1394 state->eaction = NULL;
1397 state->or_block = 0;
1402 free_show_state(struct show_state *state)
1405 free(state->printed);
1409 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1412 return (state->printed[cmd - state->rule->cmd]);
1416 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1419 state->printed[cmd - state->rule->cmd] = 1;
1423 print_limit_mask(struct buf_pr *bp, const ipfw_insn_limit *limit)
1425 struct _s_x *p = limit_masks;
1426 char const *comma = " ";
1429 for (x = limit->limit_mask; p->x != 0; p++) {
1430 if ((x & p->x) == p->x) {
1432 bprintf(bp, "%s%s", comma, p->s);
1436 bprint_uint_arg(bp, " ", limit->conn_limit);
1440 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1441 struct show_state *state, ipfw_insn *cmd)
1443 struct protoent *pe;
1449 if (is_printed_opcode(state, cmd))
1451 if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1453 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1454 bprintf(bp, " not");
1456 switch (cmd->opcode) {
1458 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1459 bprintf(bp, "prob %f ", d);
1461 case O_PROBE_STATE: /* no need to print anything here */
1462 state->flags |= HAVE_PROBE_STATE;
1465 case O_IP_SRC_LOOKUP:
1469 if (state->flags & HAVE_SRCIP)
1470 bprintf(bp, " src-ip");
1471 print_ip(bp, fo, insntod(cmd, ip));
1474 case O_IP_DST_LOOKUP:
1478 if (state->flags & HAVE_DSTIP)
1479 bprintf(bp, " dst-ip");
1480 print_ip(bp, fo, insntod(cmd, ip));
1483 case O_IP6_SRC_MASK:
1485 if (state->flags & HAVE_SRCIP)
1486 bprintf(bp, " src-ip6");
1487 print_ip6(bp, insntod(cmd, ip6));
1490 case O_IP6_DST_MASK:
1492 if (state->flags & HAVE_DSTIP)
1493 bprintf(bp, " dst-ip6");
1494 print_ip6(bp, insntod(cmd, ip6));
1497 print_flow6id(bp, insntod(cmd, u32));
1501 print_newports(bp, insntod(cmd, u16), state->proto,
1502 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1503 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0);
1506 pe = getprotobynumber(cmd->arg1);
1507 if (state->flags & HAVE_PROTO)
1508 bprintf(bp, " proto");
1510 bprintf(bp, " %s", pe->p_name);
1512 bprintf(bp, " %u", cmd->arg1);
1515 print_mac(bp, insntod(cmd, mac));
1518 print_newports(bp, insntod(cmd, u16),
1519 IPPROTO_ETHERTYPE, cmd->opcode);
1522 bprintf(bp, " frag");
1525 bprintf(bp, " fib %u", cmd->arg1);
1528 bprintf(bp, " sockarg");
1531 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1534 switch (cmd->arg1) {
1536 bprintf(bp, " diverted");
1539 bprintf(bp, " diverted-output");
1542 bprintf(bp, " diverted-loopback");
1545 bprintf(bp, " diverted-?<%u>", cmd->arg1);
1550 bprintf(bp, " layer2");
1555 if (cmd->opcode == O_XMIT)
1557 else if (cmd->opcode == O_RECV)
1559 else /* if (cmd->opcode == O_VIA) */
1561 switch (insntod(cmd, if)->name[0]) {
1563 bprintf(bp, " %s %s", s,
1564 inet_ntoa(insntod(cmd, if)->p.ip));
1567 bprintf(bp, " %s table(%s)", s,
1568 table_search_ctlv(fo->tstate,
1569 insntod(cmd, if)->p.kidx));
1572 bprintf(bp, " %s %s", s,
1573 insntod(cmd, if)->name);
1576 case O_IP_FLOW_LOOKUP:
1577 s = table_search_ctlv(fo->tstate, cmd->arg1);
1578 bprintf(bp, " flow table(%s", s);
1579 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1580 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1588 if (F_LEN(cmd) == 1) {
1589 switch (cmd->opcode) {
1606 bprintf(bp, " %s %u", s, cmd->arg1);
1608 print_newports(bp, insntod(cmd, u16), 0,
1612 bprintf(bp, " ipver %u", cmd->arg1);
1614 case O_IPPRECEDENCE:
1615 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1618 print_dscp(bp, insntod(cmd, u32));
1621 print_flags(bp, "ipoptions", cmd, f_ipopts);
1624 print_flags(bp, "iptos", cmd, f_iptos);
1627 print_icmptypes(bp, insntod(cmd, u32));
1630 bprintf(bp, " established");
1633 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1636 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1639 bprintf(bp, " tcpack %d",
1640 ntohl(insntod(cmd, u32)->d[0]));
1643 bprintf(bp, " tcpseq %d",
1644 ntohl(insntod(cmd, u32)->d[0]));
1647 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1649 bprintf(bp, " uid %s", pwd->pw_name);
1651 bprintf(bp, " uid %u",
1652 insntod(cmd, u32)->d[0]);
1655 grp = getgrgid(insntod(cmd, u32)->d[0]);
1657 bprintf(bp, " gid %s", grp->gr_name);
1659 bprintf(bp, " gid %u",
1660 insntod(cmd, u32)->d[0]);
1663 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1666 bprintf(bp, " verrevpath");
1669 bprintf(bp, " versrcreach");
1672 bprintf(bp, " antispoof");
1675 bprintf(bp, " ipsec");
1678 bprintf(bp, " // %s", (char *)(cmd + 1));
1681 if (state->flags & HAVE_PROBE_STATE)
1682 bprintf(bp, " keep-state");
1684 bprintf(bp, " record-state");
1686 object_search_ctlv(fo->tstate, cmd->arg1,
1687 IPFW_TLV_STATE_NAME));
1690 if (state->flags & HAVE_PROBE_STATE)
1691 bprintf(bp, " limit");
1693 bprintf(bp, " set-limit");
1694 print_limit_mask(bp, insntod(cmd, limit));
1696 object_search_ctlv(fo->tstate, cmd->arg1,
1697 IPFW_TLV_STATE_NAME));
1700 bprintf(bp, " ip6");
1703 bprintf(bp, " ip4");
1706 print_icmp6types(bp, insntod(cmd, u32));
1709 print_ext6hdr(bp, cmd);
1712 if (F_LEN(cmd) == 1)
1713 bprint_uint_arg(bp, " tagged ", cmd->arg1);
1715 print_newports(bp, insntod(cmd, u16),
1719 bprintf(bp, " defer-immediate-action");
1722 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1725 if (cmd->len & F_OR) {
1727 state->or_block = 1;
1728 } else if (state->or_block != 0) {
1730 state->or_block = 0;
1732 mark_printed(state, cmd);
1738 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1739 struct show_state *state, int opcode)
1744 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1745 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1746 /* We use zero opcode to print the rest of options */
1747 if (opcode >= 0 && cmd->opcode != opcode)
1750 * Skip O_NOP, when we printing the rest
1751 * of options, it will be handled separately.
1753 if (cmd->opcode == O_NOP && opcode != O_NOP)
1755 if (!print_instruction(bp, fo, state, cmd))
1763 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1765 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1770 if (cmd->opcode == O_FORWARD_IP) {
1771 sa = insntod(cmd, sa);
1772 port = sa->sa.sin_port;
1773 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1774 bprintf(bp, "fwd tablearg");
1776 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1778 sa6 = insntod(cmd, sa6);
1779 port = sa6->sa.sin6_port;
1780 bprintf(bp, "fwd ");
1781 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1782 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1783 NI_NUMERICHOST) == 0)
1784 bprintf(bp, "%s", buf);
1787 bprintf(bp, ",%u", port);
1791 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1792 struct show_state *state, const ipfw_insn *cmd)
1796 if (is_printed_opcode(state, cmd))
1798 switch (cmd->opcode) {
1800 bprintf(bp, "check-state");
1802 s = object_search_ctlv(fo->tstate, cmd->arg1,
1803 IPFW_TLV_STATE_NAME);
1806 bprintf(bp, " :%s", s ? s: "any");
1809 bprintf(bp, "allow");
1812 bprintf(bp, "count");
1815 bprintf(bp, "deny");
1818 if (cmd->arg1 == ICMP_REJECT_RST)
1819 bprintf(bp, "reset");
1820 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1821 bprintf(bp, "abort");
1822 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1823 bprintf(bp, "reject");
1825 print_reject_code(bp, cmd->arg1);
1828 if (cmd->arg1 == ICMP6_UNREACH_RST)
1829 bprintf(bp, "reset6");
1830 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1831 bprintf(bp, "abort6");
1833 print_unreach6_code(bp, cmd->arg1);
1836 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1839 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1842 bprint_uint_arg(bp, "queue ", cmd->arg1);
1845 bprint_uint_arg(bp, "divert ", cmd->arg1);
1848 bprint_uint_arg(bp, "tee ", cmd->arg1);
1851 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1854 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1861 if (insntod(cmd, log)->max_log > 0)
1862 bprintf(bp, " log logamount %d",
1863 insntod(cmd, log)->max_log);
1865 bprintf(bp, " log");
1869 print_altq_cmd(bp, insntod(cmd, altq));
1873 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1874 " tag ", cmd->arg1);
1877 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1878 bprint_uint_arg(bp, "nat ", cmd->arg1);
1880 bprintf(bp, "nat global");
1883 if (cmd->arg1 == IP_FW_TARG)
1884 bprint_uint_arg(bp, "setfib ", cmd->arg1);
1886 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1888 case O_EXTERNAL_ACTION:
1890 * The external action can consists of two following
1891 * each other opcodes - O_EXTERNAL_ACTION and
1892 * O_EXTERNAL_INSTANCE. The first contains the ID of
1893 * name of external action. The second contains the ID
1894 * of name of external action instance.
1895 * NOTE: in case when external action has no named
1896 * instances support, the second opcode isn't needed.
1898 state->eaction = cmd;
1899 s = object_search_ctlv(fo->tstate, cmd->arg1,
1901 if (match_token(rule_eactions, s) != -1)
1902 bprintf(bp, "%s", s);
1904 bprintf(bp, "eaction %s", s);
1906 case O_EXTERNAL_INSTANCE:
1907 if (state->eaction == NULL)
1910 * XXX: we need to teach ipfw(9) to rewrite opcodes
1911 * in the user buffer on rule addition. When we add
1912 * the rule, we specify zero TLV type for
1913 * O_EXTERNAL_INSTANCE object. To show correct
1914 * rule after `ipfw add` we need to search instance
1915 * name with zero type. But when we do `ipfw show`
1916 * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1919 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1921 s = object_search_ctlv(fo->tstate,
1922 cmd->arg1, IPFW_TLV_EACTION_NAME(
1923 state->eaction->arg1));
1924 bprintf(bp, " %s", s);
1926 case O_EXTERNAL_DATA:
1927 if (state->eaction == NULL)
1930 * Currently we support data formatting only for
1931 * external data with datalen u16. For unknown data
1932 * print its size in bytes.
1934 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1935 bprintf(bp, " %u", cmd->arg1);
1937 bprintf(bp, " %ubytes",
1938 cmd->len * sizeof(uint32_t));
1941 if (cmd->arg1 == IP_FW_TARG) {
1942 bprintf(bp, "setdscp tablearg");
1945 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1947 bprintf(bp, "setdscp %s", s);
1949 bprintf(bp, "setdscp %u", cmd->arg1 & 0x3F);
1952 bprintf(bp, "reass");
1955 if (cmd->len & F_NOT)
1956 bprintf(bp, "return");
1958 bprint_uint_arg(bp, "call ", cmd->arg1);
1961 bprintf(bp, "** unrecognized action %d len %d ",
1962 cmd->opcode, cmd->len);
1964 mark_printed(state, cmd);
1971 print_action(struct buf_pr *bp, struct format_opts *fo,
1972 struct show_state *state, uint8_t opcode)
1977 for (l = state->rule->cmd_len - state->rule->act_ofs,
1978 cmd = ACTION_PTR(state->rule); l > 0;
1979 l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1980 if (cmd->opcode != opcode)
1982 if (!print_action_instruction(bp, fo, state, cmd))
1990 print_proto(struct buf_pr *bp, struct format_opts *fo,
1991 struct show_state *state)
1994 int l, proto, ip4, ip6, tmp;
1996 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
1997 proto = tmp = ip4 = ip6 = 0;
1998 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1999 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2000 switch (cmd->opcode) {
2006 if (cmd->len & F_OR)
2011 if (cmd->len & F_OR)
2018 if (proto == 0 && ip4 == 0 && ip6 == 0) {
2019 state->proto = IPPROTO_IP;
2020 state->flags |= HAVE_PROTO;
2024 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
2027 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2028 if (cmd != NULL && (cmd->len & F_OR))
2029 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2030 if (cmd == NULL || (cmd->len & F_OR))
2031 for (l = proto; l > 0; l--) {
2032 cmd = print_opcode(bp, fo, state, O_PROTO);
2033 if (cmd != NULL && (cmd->len & F_OR) == 0)
2037 /* Initialize proto, it is used by print_newports() */
2041 state->proto = IPPROTO_IPV6;
2043 state->proto = IPPROTO_IP;
2044 state->flags |= HAVE_PROTO;
2048 match_opcode(int opcode, const int opcodes[], size_t nops)
2052 for (i = 0; i < nops; i++)
2053 if (opcode == opcodes[i])
2059 print_address(struct buf_pr *bp, struct format_opts *fo,
2060 struct show_state *state, const int opcodes[], size_t nops, int portop,
2064 int count, l, portcnt, pf;
2066 count = portcnt = 0;
2067 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2068 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2069 if (match_opcode(cmd->opcode, opcodes, nops))
2071 else if (cmd->opcode == portop)
2075 bprintf(bp, " any");
2076 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2077 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2078 if (!match_opcode(cmd->opcode, opcodes, nops))
2080 print_instruction(bp, fo, state, cmd);
2081 if ((cmd->len & F_OR) == 0)
2086 * If several O_IP_?PORT opcodes specified, leave them to the
2090 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2091 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2092 if (cmd->opcode != portop) {
2093 pf = (cmd->len & F_OR);
2096 /* Print opcode iff it is not in OR block. */
2097 if (pf == 0 && (cmd->len & F_OR) == 0)
2098 print_instruction(bp, fo, state, cmd);
2102 state->flags |= flag;
2105 static const int action_opcodes[] = {
2106 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2107 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2108 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2109 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2110 /* keep the following opcodes at the end of the list */
2111 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2114 static const int modifier_opcodes[] = {
2115 O_LOG, O_ALTQ, O_TAG
2118 static const int src_opcodes[] = {
2119 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2120 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2123 static const int dst_opcodes[] = {
2124 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2125 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2129 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2130 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2132 struct show_state state;
2134 static int twidth = 0;
2137 /* Print # DISABLED or skip the rule */
2138 if ((fo->set_mask & (1 << rule->set)) == 0) {
2143 bprintf(bp, "# DISABLED ");
2145 if (init_show_state(&state, rule) != 0) {
2146 warn("init_show_state() failed");
2149 bprintf(bp, "%05u ", rule->rulenum);
2151 /* Print counters if enabled */
2152 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2153 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2154 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2157 /* Print timestamp */
2158 if (co->do_time == TIMESTAMP_NUMERIC)
2159 bprintf(bp, "%10u ", cntr->timestamp);
2160 else if (co->do_time == TIMESTAMP_STRING) {
2162 time_t t = (time_t)0;
2165 strcpy(timestr, ctime(&t));
2166 *strchr(timestr, '\n') = '\0';
2167 twidth = strlen(timestr);
2169 if (cntr->timestamp > 0) {
2170 t = _long_to_time(cntr->timestamp);
2172 strcpy(timestr, ctime(&t));
2173 *strchr(timestr, '\n') = '\0';
2174 bprintf(bp, "%s ", timestr);
2176 bprintf(bp, "%*s", twidth, " ");
2180 /* Print set number */
2182 bprintf(bp, "set %d ", rule->set);
2184 /* Print the optional "match probability" */
2185 cmd = print_opcode(bp, fo, &state, O_PROB);
2186 /* Print rule action */
2187 for (i = 0; i < nitems(action_opcodes); i++) {
2188 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2191 /* Handle special cases */
2192 switch (cmd->opcode) {
2195 case O_EXTERNAL_ACTION:
2196 case O_EXTERNAL_INSTANCE:
2197 /* External action can have several instructions */
2202 /* Print rule modifiers */
2203 for (i = 0; i < nitems(modifier_opcodes); i++)
2204 print_action(bp, fo, &state, modifier_opcodes[i]);
2208 if (co->comment_only != 0)
2211 if (rule->flags & IPFW_RULE_JUSTOPTS) {
2212 state.flags |= HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP;
2216 print_proto(bp, fo, &state);
2219 bprintf(bp, " from");
2220 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2221 O_IP_SRCPORT, HAVE_SRCIP);
2223 /* Print destination */
2225 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2226 O_IP_DSTPORT, HAVE_DSTIP);
2229 /* Print the rest of options */
2230 while (print_opcode(bp, fo, &state, -1))
2233 /* Print comment at the end */
2234 cmd = print_opcode(bp, fo, &state, O_NOP);
2235 if (co->comment_only != 0 && cmd == NULL)
2236 bprintf(bp, " // ...");
2238 free_show_state(&state);
2242 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2243 struct buf_pr *bp, ipfw_dyn_rule *d)
2245 struct protoent *pe;
2248 char buf[INET6_ADDRSTRLEN];
2250 if (!co->do_expired) {
2251 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2254 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2255 bprintf(bp, "%05d", rulenum);
2256 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2258 pr_u64(bp, &d->pcnt, fo->pcwidth);
2259 pr_u64(bp, &d->bcnt, fo->bcwidth);
2260 bprintf(bp, "(%ds)", d->expire);
2262 switch (d->dyn_type) {
2263 case O_LIMIT_PARENT:
2264 bprintf(bp, " PARENT %d", d->count);
2267 bprintf(bp, " LIMIT");
2269 case O_KEEP_STATE: /* bidir, no mask */
2270 bprintf(bp, " STATE");
2274 if ((pe = getprotobynumber(d->id.proto)) != NULL)
2275 bprintf(bp, " %s", pe->p_name);
2277 bprintf(bp, " proto %u", d->id.proto);
2279 if (d->id.addr_type == 4) {
2280 a.s_addr = htonl(d->id.src_ip);
2281 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2283 a.s_addr = htonl(d->id.dst_ip);
2284 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2285 } else if (d->id.addr_type == 6) {
2286 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2287 sizeof(buf)), d->id.src_port);
2288 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2289 buf, sizeof(buf)), d->id.dst_port);
2291 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2293 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2294 d->kidx, IPFW_TLV_STATE_NAME));
2298 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2300 ipfw_range_header rh;
2303 memset(&rh, 0, sizeof(rh));
2304 memcpy(&rh.range, rt, sizeof(*rt));
2305 rh.range.head.length = sizeof(*rt);
2306 rh.range.head.type = IPFW_TLV_RANGE;
2309 if (do_get3(cmd, &rh.opheader, &sz) != 0)
2311 /* Save number of matched objects */
2312 rt->new_set = rh.range.new_set;
2317 * This one handles all set-related commands
2318 * ipfw set { show | enable | disable }
2320 * ipfw set move X to Y
2321 * ipfw set move rule X to Y
2324 ipfw_sets_handler(char *av[])
2335 memset(&rt, 0, sizeof(rt));
2338 errx(EX_USAGE, "set needs command");
2339 if (_substrcmp(*av, "show") == 0) {
2340 struct format_opts fo;
2341 ipfw_cfg_lheader *cfg;
2343 memset(&fo, 0, sizeof(fo));
2344 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2345 err(EX_OSERR, "requesting config failed");
2347 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2348 if ((cfg->set_mask & (1<<i)) == 0) {
2349 printf("%s %d", msg, i);
2352 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2353 for (i = 0; i < RESVD_SET; i++)
2354 if ((cfg->set_mask & (1<<i)) != 0) {
2355 printf("%s %d", msg, i);
2360 } else if (_substrcmp(*av, "swap") == 0) {
2362 if ( av[0] == NULL || av[1] == NULL )
2363 errx(EX_USAGE, "set swap needs 2 set numbers\n");
2364 rt.set = atoi(av[0]);
2365 rt.new_set = atoi(av[1]);
2366 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2367 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2368 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2369 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2370 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2371 } else if (_substrcmp(*av, "move") == 0) {
2373 if (av[0] && _substrcmp(*av, "rule") == 0) {
2374 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2378 cmd = IP_FW_SET_MOVE; /* Move set to new one */
2379 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2380 av[3] != NULL || _substrcmp(av[1], "to") != 0)
2381 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2382 rulenum = atoi(av[0]);
2383 rt.new_set = atoi(av[2]);
2384 if (cmd == IP_FW_XMOVE) {
2385 rt.start_rule = rulenum;
2386 rt.end_rule = rulenum;
2389 rt.new_set = atoi(av[2]);
2390 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2391 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2392 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2393 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2394 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2395 i = do_range_cmd(cmd, &rt);
2397 err(EX_OSERR, "failed to move %s",
2398 cmd == IP_FW_SET_MOVE ? "set": "rule");
2399 } else if (_substrcmp(*av, "disable") == 0 ||
2400 _substrcmp(*av, "enable") == 0 ) {
2401 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2404 masks[0] = masks[1] = 0;
2407 if (isdigit(**av)) {
2409 if (i < 0 || i > RESVD_SET)
2411 "invalid set number %d\n", i);
2412 masks[which] |= (1<<i);
2413 } else if (_substrcmp(*av, "disable") == 0)
2415 else if (_substrcmp(*av, "enable") == 0)
2419 "invalid set command %s\n", *av);
2422 if ( (masks[0] & masks[1]) != 0 )
2424 "cannot enable and disable the same set\n");
2427 rt.new_set = masks[1];
2428 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2430 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2432 errx(EX_USAGE, "invalid set command %s\n", *av);
2436 ipfw_sysctl_handler(char *av[], int which)
2440 if (av[0] == NULL) {
2441 warnx("missing keyword to enable/disable\n");
2442 } else if (_substrcmp(*av, "firewall") == 0) {
2443 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2444 &which, sizeof(which));
2445 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2446 &which, sizeof(which));
2447 } else if (_substrcmp(*av, "one_pass") == 0) {
2448 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2449 &which, sizeof(which));
2450 } else if (_substrcmp(*av, "debug") == 0) {
2451 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2452 &which, sizeof(which));
2453 } else if (_substrcmp(*av, "verbose") == 0) {
2454 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2455 &which, sizeof(which));
2456 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2457 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2458 &which, sizeof(which));
2460 } else if (_substrcmp(*av, "altq") == 0) {
2461 altq_set_enabled(which);
2464 warnx("unrecognize enable/disable keyword: %s\n", *av);
2468 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2469 void *arg, void *state);
2472 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2473 void *arg, void *_state)
2479 d = (ipfw_dyn_rule *)_state;
2480 /* Count _ALL_ states */
2483 if (fo->show_counters == 0)
2487 /* skip states from another set */
2488 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2490 if (set != co->use_set - 1)
2494 width = pr_u64(NULL, &d->pcnt, 0);
2495 if (width > fo->pcwidth)
2496 fo->pcwidth = width;
2498 width = pr_u64(NULL, &d->bcnt, 0);
2499 if (width > fo->bcwidth)
2500 fo->bcwidth = width;
2504 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2505 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2511 ipfw_obj_ctlv *ctlv;
2517 ctlv = (ipfw_obj_ctlv *)base;
2518 switch (ctlv->head.type) {
2519 case IPFW_TLV_DYNSTATE_LIST:
2520 base += sizeof(*ctlv);
2521 sz -= sizeof(*ctlv);
2522 ttype = IPFW_TLV_DYN_ENT;
2531 tlv = (ipfw_obj_tlv *)base;
2532 if (tlv->type != ttype)
2535 fptr(co, fo, farg, tlv + 1);
2537 base += tlv->length;
2545 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2546 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2548 int bcwidth, pcwidth, width;
2550 struct ip_fw_bcounter *cntr;
2551 struct ip_fw_rule *r;
2555 if (fo->show_counters != 0) {
2556 for (n = 0; n < rcnt; n++,
2557 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2558 cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2559 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2560 /* skip rules from another set */
2561 if (co->use_set && r->set != co->use_set - 1)
2564 /* packet counter */
2565 width = pr_u64(NULL, &cntr->pcnt, 0);
2566 if (width > pcwidth)
2570 width = pr_u64(NULL, &cntr->bcnt, 0);
2571 if (width > bcwidth)
2575 fo->bcwidth = bcwidth;
2576 fo->pcwidth = pcwidth;
2579 if (co->do_dynamic && dynsz > 0)
2580 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2584 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2585 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2588 struct ip_fw_rule *r;
2589 struct ip_fw_bcounter *cntr;
2592 for (n = seen = 0; n < rcnt; n++,
2593 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2595 if ((fo->show_counters | fo->show_time) != 0) {
2596 cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2597 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2600 r = (struct ip_fw_rule *)(rtlv + 1);
2602 if (r->rulenum > fo->last)
2604 if (co->use_set && r->set != co->use_set - 1)
2606 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2607 show_static_rule(co, fo, bp, r, cntr);
2608 printf("%s", bp->buf);
2619 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2620 void *_arg, void *_state)
2627 d = (ipfw_dyn_rule *)_state;
2628 bp = (struct buf_pr *)_arg;
2630 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2631 if (rulenum > fo->last)
2634 bcopy((char *)&d->rule + sizeof(uint16_t),
2635 &set, sizeof(uint8_t));
2636 if (set != co->use_set - 1)
2639 if (rulenum >= fo->first) {
2640 show_dyn_state(co, fo, bp, d);
2641 printf("%s\n", bp->buf);
2647 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2648 struct buf_pr *bp, caddr_t base, size_t sz)
2651 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2656 ipfw_list(int ac, char *av[], int show_counters)
2658 ipfw_cfg_lheader *cfg;
2659 struct format_opts sfo;
2668 fprintf(stderr, "Testing only, list disabled\n");
2672 dummynet_list(ac, av, show_counters);
2678 memset(&sfo, 0, sizeof(sfo));
2680 /* Determine rule range to request */
2682 for (lac = ac, lav = av; lac != 0; lac--) {
2683 rnum = strtoul(*lav++, &endptr, 10);
2684 if (sfo.first == 0 || rnum < sfo.first)
2688 rnum = strtoul(endptr + 1, &endptr, 10);
2689 if (sfo.last == 0 || rnum > sfo.last)
2694 /* get configuraion from kernel */
2696 sfo.show_counters = show_counters;
2697 sfo.show_time = co.do_time;
2698 sfo.flags = IPFW_CFG_GET_STATIC;
2699 if (co.do_dynamic != 0)
2700 sfo.flags |= IPFW_CFG_GET_STATES;
2701 if ((sfo.show_counters | sfo.show_time) != 0)
2702 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2703 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2704 err(EX_OSERR, "retrieving config failed");
2706 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2715 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2716 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2721 int exitval = EX_OK;
2727 ipfw_obj_ctlv *ctlv, *tstate;
2728 ipfw_obj_tlv *rbase;
2731 * Handle tablenames TLV first, if any
2737 readsz = sizeof(*cfg);
2740 fo->set_mask = cfg->set_mask;
2742 ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2744 if (cfg->flags & IPFW_CFG_GET_STATIC) {
2745 /* We've requested static rules */
2746 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2747 object_sort_ctlv(ctlv);
2749 readsz += ctlv->head.length;
2750 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2754 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2755 rbase = (ipfw_obj_tlv *)(ctlv + 1);
2757 readsz += ctlv->head.length;
2758 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2763 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) {
2764 /* We may have some dynamic states */
2765 dynsz = sz - readsz;
2766 /* Skip empty header */
2767 if (dynsz != sizeof(ipfw_obj_ctlv))
2768 dynbase = (caddr_t)ctlv;
2773 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2774 bp_alloc(&bp, 4096);
2776 /* if no rule numbers were specified, list all rules */
2779 fo->last = IPFW_DEFAULT_RULE;
2780 list_static_range(co, fo, &bp, rbase, rcnt);
2782 if (co->do_dynamic && dynsz > 0) {
2783 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2784 list_dyn_range(co, fo, &bp, dynbase, dynsz);
2791 /* display specific rules requested on command line */
2792 for (lac = ac, lav = av; lac != 0; lac--) {
2793 /* convert command line rule # */
2794 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2796 fo->last = strtoul(endptr + 1, &endptr, 10);
2799 warnx("invalid rule number: %s", *(lav - 1));
2803 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2804 /* give precedence to other error(s) */
2805 if (exitval == EX_OK)
2806 exitval = EX_UNAVAILABLE;
2807 if (fo->first == fo->last)
2808 warnx("rule %u does not exist", fo->first);
2810 warnx("no rules in range %u-%u",
2811 fo->first, fo->last);
2815 if (co->do_dynamic && dynsz > 0) {
2816 printf("## Dynamic rules:\n");
2817 for (lac = ac, lav = av; lac != 0; lac--) {
2818 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2820 fo->last = strtoul(endptr+1, &endptr, 10);
2822 /* already warned */
2824 list_dyn_range(co, fo, &bp, dynbase, dynsz);
2834 * Retrieves current ipfw configuration of given type
2835 * and stores its pointer to @pcfg.
2837 * Caller is responsible for freeing @pcfg.
2839 * Returns 0 on success.
2843 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2844 ipfw_cfg_lheader **pcfg, size_t *psize)
2846 ipfw_cfg_lheader *cfg;
2851 if (co->test_only != 0) {
2852 fprintf(stderr, "Testing only, list disabled\n");
2856 /* Start with some data size */
2860 for (i = 0; i < 16; i++) {
2863 if ((cfg = calloc(1, sz)) == NULL)
2866 cfg->flags = fo->flags;
2867 cfg->start_rule = fo->first;
2868 cfg->end_rule = fo->last;
2870 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2871 if (errno != ENOMEM) {
2876 /* Buffer size is not enough. Try to increase */
2893 lookup_host (char *host, struct in_addr *ipaddr)
2897 if (!inet_aton(host, ipaddr)) {
2898 if ((he = gethostbyname(host)) == NULL)
2900 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2914 ipfw_check_object_name(const char *name)
2919 * Check that name is null-terminated and contains
2920 * valid symbols only. Valid mask is:
2921 * [a-zA-Z0-9\-_\.]{1,63}
2924 if (l == 0 || l >= 64)
2926 for (i = 0; i < l; i++) {
2928 if (isalpha(c) || isdigit(c) || c == '_' ||
2929 c == '-' || c == '.')
2936 static char *default_state_name = "default";
2938 state_check_name(const char *name)
2941 if (ipfw_check_object_name(name) != 0)
2943 if (strcmp(name, "any") == 0)
2949 eaction_check_name(const char *name)
2952 if (ipfw_check_object_name(name) != 0)
2954 /* Restrict some 'special' names */
2955 if (match_token(rule_actions, name) != -1 &&
2956 match_token(rule_action_params, name) != -1)
2962 pack_object(struct tidx *tstate, char *name, int otype)
2965 ipfw_obj_ntlv *ntlv;
2967 for (i = 0; i < tstate->count; i++) {
2968 if (strcmp(tstate->idx[i].name, name) != 0)
2970 if (tstate->idx[i].set != tstate->set)
2972 if (tstate->idx[i].head.type != otype)
2975 return (tstate->idx[i].idx);
2978 if (tstate->count + 1 > tstate->size) {
2980 tstate->idx = realloc(tstate->idx, tstate->size *
2981 sizeof(ipfw_obj_ntlv));
2982 if (tstate->idx == NULL)
2986 ntlv = &tstate->idx[i];
2987 memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2988 strlcpy(ntlv->name, name, sizeof(ntlv->name));
2989 ntlv->head.type = otype;
2990 ntlv->head.length = sizeof(ipfw_obj_ntlv);
2991 ntlv->set = tstate->set;
2992 ntlv->idx = ++tstate->counter;
2999 pack_table(struct tidx *tstate, char *name)
3002 if (table_check_name(name) != 0)
3005 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
3009 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
3010 struct tidx *tstate)
3012 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3016 if ((p = strchr(av + 6, ')')) == NULL)
3017 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
3019 p = strchr(av + 6, ',');
3023 if ((uidx = pack_table(tstate, av + 6)) == 0)
3024 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
3026 cmd->opcode = opcode;
3029 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3030 d[0] = strtoul(p, NULL, 0);
3032 cmd->len |= F_INSN_SIZE(ipfw_insn);
3037 * fills the addr and mask fields in the instruction as appropriate from av.
3038 * Update length as appropriate.
3039 * The following formats are allowed:
3040 * me returns O_IP_*_ME
3041 * 1.2.3.4 single IP address
3042 * 1.2.3.4:5.6.7.8 address:mask
3043 * 1.2.3.4/24 address/mask
3044 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
3045 * We can have multiple comma-separated address/mask entries.
3048 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3051 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3053 cmd->o.len &= ~F_LEN_MASK; /* zero len */
3055 if (_substrcmp(av, "any") == 0)
3058 if (_substrcmp(av, "me") == 0) {
3059 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3063 if (strncmp(av, "table(", 6) == 0) {
3064 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3070 * After the address we can have '/' or ':' indicating a mask,
3071 * ',' indicating another address follows, '{' indicating a
3072 * set of addresses of unspecified size.
3074 char *t = NULL, *p = strpbrk(av, "/:,{");
3078 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3083 if ((t = strpbrk(p, ",{")) != NULL) {
3090 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3091 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3094 if (!inet_aton(p, (struct in_addr *)&d[1]))
3095 errx(EX_DATAERR, "bad netmask ``%s''", p);
3100 d[1] = htonl(0U); /* mask */
3101 else if (masklen > 32)
3102 errx(EX_DATAERR, "bad width ``%s''", p);
3104 d[1] = htonl(~0U << (32 - masklen));
3106 case '{': /* no mask, assume /24 and put back the '{' */
3107 d[1] = htonl(~0U << (32 - 24));
3111 case ',': /* single address plus continuation */
3114 case 0: /* initialization value */
3116 d[1] = htonl(~0U); /* force /32 */
3119 d[0] &= d[1]; /* mask base address with mask */
3122 /* find next separator */
3124 p = strpbrk(p, ",{");
3125 if (p && *p == '{') {
3127 * We have a set of addresses. They are stored as follows:
3128 * arg1 is the set size (powers of 2, 2..256)
3129 * addr is the base address IN HOST FORMAT
3130 * mask.. is an array of arg1 bits (rounded up to
3131 * the next multiple of 32) with bits set
3132 * for each host in the map.
3134 uint32_t *map = (uint32_t *)&cmd->mask;
3136 int i = contigmask((uint8_t *)&(d[1]), 32);
3139 errx(EX_DATAERR, "address set cannot be in a list");
3140 if (i < 24 || i > 31)
3141 errx(EX_DATAERR, "invalid set with mask %d\n", i);
3142 cmd->o.arg1 = 1<<(32-i); /* map length */
3143 d[0] = ntohl(d[0]); /* base addr in host format */
3144 cmd->o.opcode = O_IP_DST_SET; /* default */
3145 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3146 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3147 map[i] = 0; /* clear map */
3151 high = low + cmd->o.arg1 - 1;
3153 * Here, i stores the previous value when we specify a range
3154 * of addresses within a mask, e.g. 45-63. i = -1 means we
3155 * have no previous value.
3157 i = -1; /* previous value in a range */
3158 while (isdigit(*av)) {
3160 int a = strtol(av, &s, 0);
3162 if (s == av) { /* no parameter */
3164 errx(EX_DATAERR, "set not closed\n");
3166 errx(EX_DATAERR, "incomplete range %d-", i);
3169 if (a < low || a > high)
3170 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3173 if (i == -1) /* no previous in range */
3175 else { /* check that range is valid */
3177 errx(EX_DATAERR, "invalid range %d-%d",
3180 errx(EX_DATAERR, "double '-' in range");
3183 map[i/32] |= 1<<(i & 31);
3194 if (av) /* then *av must be a ',' */
3197 /* Check this entry */
3198 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3200 * 'any' turns the entire list into a NOP.
3201 * 'not any' never matches, so it is removed from the
3202 * list unless it is the only item, in which case we
3205 if (cmd->o.len & F_NOT) { /* "not any" never matches */
3206 if (av == NULL && len == 0) /* only this entry */
3207 errx(EX_DATAERR, "not any never matches");
3209 /* else do nothing and skip this entry */
3212 /* A single IP can be stored in an optimized format */
3213 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3214 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3217 len += 2; /* two words... */
3220 if (len + 1 > F_LEN_MASK)
3221 errx(EX_DATAERR, "address list too long");
3222 cmd->o.len |= len+1;
3226 /* n2mask sets n bits of the mask */
3228 n2mask(struct in6_addr *mask, int n)
3230 static int minimask[9] =
3231 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3234 memset(mask, 0, sizeof(struct in6_addr));
3235 p = (u_char *) mask;
3236 for (; n > 0; p++, n -= 8) {
3246 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3247 struct _s_x *flags, char *p)
3250 uint32_t set = 0, clear = 0;
3252 if (fill_flags(flags, p, &e, &set, &clear) != 0)
3253 errx(EX_DATAERR, "invalid flag %s", e);
3255 cmd->opcode = opcode;
3256 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
3257 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3262 ipfw_delete(char *av[])
3267 int exitval = EX_OK;
3271 NEED1("missing rule specification");
3272 if ( *av && _substrcmp(*av, "set") == 0) {
3273 /* Do not allow using the following syntax:
3274 * ipfw set N delete set M
3277 errx(EX_DATAERR, "invalid syntax");
3278 do_set = 1; /* delete set */
3283 while (*av && isdigit(**av)) {
3284 i = strtol(*av, &sep, 10);
3287 j = strtol(sep + 1, NULL, 10);
3290 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3292 exitval = EX_UNAVAILABLE;
3295 warn("nat %u not available", i);
3297 } else if (co.do_pipe) {
3298 exitval = ipfw_delete_pipe(co.do_pipe, i);
3300 memset(&rt, 0, sizeof(rt));
3303 rt.flags = IPFW_RCFLAG_SET;
3305 rt.start_rule = i & 0xffff;
3306 rt.end_rule = j & 0xffff;
3307 if (rt.start_rule == 0 && rt.end_rule == 0)
3308 rt.flags |= IPFW_RCFLAG_ALL;
3310 rt.flags |= IPFW_RCFLAG_RANGE;
3311 if (co.use_set != 0) {
3312 rt.set = co.use_set - 1;
3313 rt.flags |= IPFW_RCFLAG_SET;
3316 i = do_range_cmd(IP_FW_XDEL, &rt);
3318 exitval = EX_UNAVAILABLE;
3321 warn("rule %u: setsockopt(IP_FW_XDEL)",
3323 } else if (rt.new_set == 0 && do_set == 0) {
3324 exitval = EX_UNAVAILABLE;
3327 if (rt.start_rule != rt.end_rule)
3328 warnx("no rules rules in %u-%u range",
3329 rt.start_rule, rt.end_rule);
3331 warnx("rule %u not found",
3336 if (exitval != EX_OK && co.do_force == 0)
3342 * fill the interface structure. We do not check the name as we can
3343 * create interfaces dynamically, so checking them at insert time
3344 * makes relatively little sense.
3345 * Interface names containing '*', '?', or '[' are assumed to be shell
3346 * patterns which match interfaces.
3349 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3354 cmd->name[0] = '\0';
3355 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3359 /* Parse the interface or address */
3360 if (strcmp(arg, "any") == 0)
3361 cmd->o.len = 0; /* effectively ignore this command */
3362 else if (strncmp(arg, "table(", 6) == 0) {
3363 if ((p = strchr(arg + 6, ')')) == NULL)
3364 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3366 p = strchr(arg + 6, ',');
3369 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3370 errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3372 cmd->name[0] = '\1'; /* Special value indicating table */
3374 } else if (!isdigit(*arg)) {
3375 strlcpy(cmd->name, arg, sizeof(cmd->name));
3376 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3377 } else if (!inet_aton(arg, &cmd->p.ip))
3378 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3382 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3386 char *ap, *ptr, *optr;
3387 struct ether_addr *mac;
3388 const char *macset = "0123456789abcdefABCDEF:";
3390 if (strcmp(p, "any") == 0) {
3391 for (i = 0; i < ETHER_ADDR_LEN; i++)
3392 addr[i] = mask[i] = 0;
3396 optr = ptr = strdup(p);
3397 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3399 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3400 errx(EX_DATAERR, "Incorrect MAC address");
3401 bcopy(mac, addr, ETHER_ADDR_LEN);
3403 errx(EX_DATAERR, "Incorrect MAC address");
3405 if (ptr != NULL) { /* we have mask? */
3406 if (p[ptr - optr - 1] == '/') { /* mask len */
3407 long ml = strtol(ptr, &ap, 10);
3408 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3409 errx(EX_DATAERR, "Incorrect mask length");
3410 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3411 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3414 if (strspn(ptr, macset) != l ||
3415 (mac = ether_aton(ptr)) == NULL)
3416 errx(EX_DATAERR, "Incorrect mask");
3417 bcopy(mac, mask, ETHER_ADDR_LEN);
3419 } else { /* default mask: ff:ff:ff:ff:ff:ff */
3420 for (i = 0; i < ETHER_ADDR_LEN; i++)
3423 for (i = 0; i < ETHER_ADDR_LEN; i++)
3430 * helper function, updates the pointer to cmd with the length
3431 * of the current command, and also cleans up the first word of
3432 * the new command in case it has been clobbered before.
3435 next_cmd(ipfw_insn *cmd, int *len)
3438 CHECK_LENGTH(*len, 0);
3440 bzero(cmd, sizeof(*cmd));
3445 * Takes arguments and copies them into a comment
3448 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3451 char *p = (char *)(cmd + 1);
3453 cmd->opcode = O_NOP;
3454 cmd->len = (cmd->len & (F_NOT | F_OR));
3456 /* Compute length of comment string. */
3457 for (i = 0, l = 0; av[i] != NULL; i++)
3458 l += strlen(av[i]) + 1;
3463 "comment too long (max 80 chars)");
3465 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
3468 for (i = 0; av[i] != NULL; i++) {
3477 * A function to fill simple commands of size 1.
3478 * Existing flags are preserved.
3481 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3483 cmd->opcode = opcode;
3484 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3489 * Fetch and add the MAC address and type, with masks. This generates one or
3490 * two microinstructions, and returns the pointer to the last one.
3493 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3497 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3498 errx(EX_DATAERR, "MAC dst src");
3500 cmd->opcode = O_MACADDR2;
3501 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3504 mac = (ipfw_insn_mac *)cmd;
3505 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3506 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3507 &(mac->mask[ETHER_ADDR_LEN])); /* src */
3512 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3515 errx(EX_DATAERR, "missing MAC type");
3516 if (strcmp(av, "any") != 0) { /* we have a non-null type */
3517 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3519 cmd->opcode = O_MAC_TYPE;
3526 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3528 struct protoent *pe;
3532 proto = strtol(av, &ep, 10);
3533 if (*ep != '\0' || proto <= 0) {
3534 if ((pe = getprotobyname(av)) == NULL)
3536 proto = pe->p_proto;
3539 fill_cmd(cmd, O_PROTO, 0, proto);
3545 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3547 u_char proto = IPPROTO_IP;
3549 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3550 ; /* do not set O_IP4 nor O_IP6 */
3551 else if (strcmp(av, "ip4") == 0)
3552 /* explicit "just IPv4" rule */
3553 fill_cmd(cmd, O_IP4, 0, 0);
3554 else if (strcmp(av, "ip6") == 0) {
3555 /* explicit "just IPv6" rule */
3556 proto = IPPROTO_IPV6;
3557 fill_cmd(cmd, O_IP6, 0, 0);
3559 return add_proto0(cmd, av, protop);
3566 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3568 u_char proto = IPPROTO_IP;
3570 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3571 ; /* do not set O_IP4 nor O_IP6 */
3572 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3573 /* explicit "just IPv4" rule */
3574 fill_cmd(cmd, O_IP4, 0, 0);
3575 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3576 /* explicit "just IPv6" rule */
3577 proto = IPPROTO_IPV6;
3578 fill_cmd(cmd, O_IP6, 0, 0);
3580 return add_proto0(cmd, av, protop);
3587 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3589 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3590 if (cmd->opcode == O_IP_DST_SET) /* set */
3591 cmd->opcode = O_IP_SRC_SET;
3592 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3593 cmd->opcode = O_IP_SRC_LOOKUP;
3594 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3595 cmd->opcode = O_IP_SRC_ME;
3596 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3597 cmd->opcode = O_IP_SRC;
3598 else /* addr/mask */
3599 cmd->opcode = O_IP_SRC_MASK;
3604 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3606 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3607 if (cmd->opcode == O_IP_DST_SET) /* set */
3609 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3611 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3612 cmd->opcode = O_IP_DST_ME;
3613 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3614 cmd->opcode = O_IP_DST;
3615 else /* addr/mask */
3616 cmd->opcode = O_IP_DST_MASK;
3620 static struct _s_x f_reserved_keywords[] = {
3623 { "diverted", TOK_OR },
3624 { "dst-port", TOK_OR },
3625 { "src-port", TOK_OR },
3626 { "established", TOK_OR },
3627 { "keep-state", TOK_OR },
3629 { "icmptypes", TOK_OR },
3637 { NULL, 0 } /* terminator */
3641 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3644 if (match_token(f_reserved_keywords, av) != -1)
3647 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3648 /* XXX todo: check that we have a protocol with ports */
3649 cmd->opcode = opcode;
3656 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3659 char *host, *ch, buf[INET6_ADDRSTRLEN];
3660 ipfw_insn *ret = NULL;
3663 /* Copy first address in set if needed */
3664 if ((ch = strpbrk(av, "/,")) != NULL) {
3666 strlcpy(buf, av, sizeof(buf));
3667 if (len < sizeof(buf))
3673 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3674 inet_pton(AF_INET6, host, &a) == 1)
3675 ret = add_srcip6(cmd, av, cblen, tstate);
3676 /* XXX: should check for IPv4, not !IPv6 */
3677 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3678 inet_pton(AF_INET6, host, &a) != 1))
3679 ret = add_srcip(cmd, av, cblen, tstate);
3680 if (ret == NULL && strcmp(av, "any") != 0)
3687 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3690 char *host, *ch, buf[INET6_ADDRSTRLEN];
3691 ipfw_insn *ret = NULL;
3694 /* Copy first address in set if needed */
3695 if ((ch = strpbrk(av, "/,")) != NULL) {
3697 strlcpy(buf, av, sizeof(buf));
3698 if (len < sizeof(buf))
3704 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3705 inet_pton(AF_INET6, host, &a) == 1)
3706 ret = add_dstip6(cmd, av, cblen, tstate);
3707 /* XXX: should check for IPv4, not !IPv6 */
3708 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3709 inet_pton(AF_INET6, host, &a) != 1))
3710 ret = add_dstip(cmd, av, cblen, tstate);
3711 if (ret == NULL && strcmp(av, "any") != 0)
3718 * Parse arguments and assemble the microinstructions which make up a rule.
3719 * Rules are added into the 'rulebuf' and then copied in the correct order
3720 * into the actual rule.
3722 * The syntax for a rule starts with the action, followed by
3723 * optional action parameters, and the various match patterns.
3724 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3725 * (generated if the rule includes a keep-state option), then the
3726 * various match patterns, log/altq actions, and the actual action.
3730 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3733 * rules are added into the 'rulebuf' and then copied in
3734 * the correct order into the actual rule.
3735 * Some things that need to go out of order (prob, action etc.)
3738 static uint32_t actbuf[255], cmdbuf[255];
3739 int rblen, ablen, cblen;
3741 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3742 ipfw_insn *first_cmd; /* first match pattern */
3744 struct ip_fw_rule *rule;
3747 * various flags used to record that we entered some fields.
3749 ipfw_insn *have_state = NULL; /* any state-related option */
3750 int have_rstate = 0;
3751 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3752 ipfw_insn *have_skipcmd = NULL;
3757 int open_par = 0; /* open parenthesis ( */
3759 /* proto is here because it is used to fetch ports */
3760 u_char proto = IPPROTO_IP; /* default protocol */
3762 double match_prob = 1; /* match probability, default is always match */
3764 bzero(actbuf, sizeof(actbuf)); /* actions go here */
3765 bzero(cmdbuf, sizeof(cmdbuf));
3766 bzero(rbuf, *rbufsize);
3768 rule = (struct ip_fw_rule *)rbuf;
3769 cmd = (ipfw_insn *)cmdbuf;
3770 action = (ipfw_insn *)actbuf;
3772 rblen = *rbufsize / sizeof(uint32_t);
3773 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3774 ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3775 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3776 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3778 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; }
3779 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len)
3783 /* [rule N] -- Rule number optional */
3784 if (av[0] && isdigit(**av)) {
3785 rule->rulenum = atoi(*av);
3789 /* [set N] -- set number (0..RESVD_SET), optional */
3790 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3791 int set = strtoul(av[1], NULL, 10);
3792 if (set < 0 || set > RESVD_SET)
3793 errx(EX_DATAERR, "illegal set %s", av[1]);
3799 /* [prob D] -- match probability, optional */
3800 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3801 match_prob = strtod(av[1], NULL);
3803 if (match_prob <= 0 || match_prob > 1)
3804 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3808 /* action -- mandatory */
3809 NEED1("missing action");
3810 i = match_token(rule_actions, *av);
3812 action->len = 1; /* default */
3815 case TOK_CHECKSTATE:
3816 have_state = action;
3817 action->opcode = O_CHECK_STATE;
3819 match_token(rule_options, *av) == TOK_COMMENT) {
3820 action->arg1 = pack_object(tstate,
3821 default_state_name, IPFW_TLV_STATE_NAME);
3824 if (*av[0] == ':') {
3825 if (strcmp(*av + 1, "any") == 0)
3827 else if (state_check_name(*av + 1) == 0)
3828 action->arg1 = pack_object(tstate, *av + 1,
3829 IPFW_TLV_STATE_NAME);
3831 errx(EX_DATAERR, "Invalid state name %s",
3836 errx(EX_DATAERR, "Invalid state name %s", *av);
3840 action->opcode = O_REJECT;
3841 action->arg1 = ICMP_REJECT_ABORT;
3845 action->opcode = O_UNREACH6;
3846 action->arg1 = ICMP6_UNREACH_ABORT;
3850 action->opcode = O_ACCEPT;
3854 action->opcode = O_DENY;
3859 action->opcode = O_REJECT;
3860 action->arg1 = ICMP_UNREACH_HOST;
3864 action->opcode = O_REJECT;
3865 action->arg1 = ICMP_REJECT_RST;
3869 action->opcode = O_UNREACH6;
3870 action->arg1 = ICMP6_UNREACH_RST;
3874 action->opcode = O_REJECT;
3875 NEED1("missing reject code");
3876 fill_reject_code(&action->arg1, *av);
3881 action->opcode = O_UNREACH6;
3882 NEED1("missing unreach code");
3883 fill_unreach6_code(&action->arg1, *av);
3888 action->opcode = O_COUNT;
3892 action->opcode = O_NAT;
3893 action->len = F_INSN_SIZE(ipfw_insn_nat);
3895 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3896 action->arg1 = IP_FW_NAT44_GLOBAL;
3902 action->opcode = O_QUEUE;
3905 action->opcode = O_PIPE;
3908 action->opcode = O_SKIPTO;
3911 action->opcode = O_NETGRAPH;
3914 action->opcode = O_NGTEE;
3917 action->opcode = O_DIVERT;
3920 action->opcode = O_TEE;
3923 action->opcode = O_CALLRETURN;
3926 errx(EX_USAGE, "missing argument for %s", *(av - 1));
3927 if (isdigit(**av)) {
3928 action->arg1 = strtoul(*av, NULL, 10);
3929 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3930 errx(EX_DATAERR, "illegal argument for %s",
3932 } else if (_substrcmp(*av, "tablearg") == 0) {
3933 action->arg1 = IP_FW_TARG;
3934 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3937 s = getservbyname(av[0], "divert");
3939 action->arg1 = ntohs(s->s_port);
3941 errx(EX_DATAERR, "illegal divert/tee port");
3943 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3949 * Locate the address-port separator (':' or ',').
3950 * Could be one of the following:
3954 * IPv6 w:x:y::z,port
3955 * The ':' can only be used with hostname and IPv4 address.
3956 * XXX-BZ Should we also support [w:x:y::z]:port?
3958 struct sockaddr_storage result;
3959 struct addrinfo *res;
3962 u_short port_number;
3964 NEED1("missing forward address[:port]");
3967 * locate the address-port separator (':' or ',')
3969 s = strchr(*av, ',');
3971 /* Distinguish between IPv4:port and IPv6 cases. */
3972 s = strchr(*av, ':');
3973 if (s && strchr(s+1, ':'))
3974 s = NULL; /* no port */
3979 /* Terminate host portion and set s to start of port. */
3981 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3984 "illegal forwarding port ``%s''", s);
3985 port_number = (u_short)i;
3988 if (_substrcmp(*av, "tablearg") == 0) {
3990 ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3994 * Resolve the host name or address to a family and a
3995 * network representation of the address.
3997 if (getaddrinfo(*av, NULL, NULL, &res))
3998 errx(EX_DATAERR, NULL);
3999 /* Just use the first host in the answer. */
4000 family = res->ai_family;
4001 memcpy(&result, res->ai_addr, res->ai_addrlen);
4005 if (family == PF_INET) {
4006 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
4008 action->opcode = O_FORWARD_IP;
4009 action->len = F_INSN_SIZE(ipfw_insn_sa);
4013 * In the kernel we assume AF_INET and use only
4014 * sin_port and sin_addr. Remember to set sin_len as
4015 * the routing code seems to use it too.
4017 p->sa.sin_len = sizeof(struct sockaddr_in);
4018 p->sa.sin_family = AF_INET;
4019 p->sa.sin_port = port_number;
4020 p->sa.sin_addr.s_addr =
4021 ((struct sockaddr_in *)&result)->sin_addr.s_addr;
4022 } else if (family == PF_INET6) {
4023 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
4025 action->opcode = O_FORWARD_IP6;
4026 action->len = F_INSN_SIZE(ipfw_insn_sa6);
4029 p->sa.sin6_len = sizeof(struct sockaddr_in6);
4030 p->sa.sin6_family = AF_INET6;
4031 p->sa.sin6_port = port_number;
4032 p->sa.sin6_flowinfo = 0;
4033 p->sa.sin6_scope_id =
4034 ((struct sockaddr_in6 *)&result)->sin6_scope_id;
4035 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
4036 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
4038 errx(EX_DATAERR, "Invalid address family in forward action");
4044 /* pretend it is a 'count' rule followed by the comment */
4045 action->opcode = O_COUNT;
4046 av--; /* go back... */
4052 size_t intsize = sizeof(int);
4054 action->opcode = O_SETFIB;
4055 NEED1("missing fib number");
4056 if (_substrcmp(*av, "tablearg") == 0) {
4057 action->arg1 = IP_FW_TARG;
4059 action->arg1 = strtoul(*av, NULL, 10);
4060 if (sysctlbyname("net.fibs", &numfibs, &intsize,
4062 errx(EX_DATAERR, "fibs not suported.\n");
4063 if (action->arg1 >= numfibs) /* Temporary */
4064 errx(EX_DATAERR, "fib too large.\n");
4065 /* Add high-order bit to fib to make room for tablearg*/
4066 action->arg1 |= 0x8000;
4076 action->opcode = O_SETDSCP;
4077 NEED1("missing DSCP code");
4078 if (_substrcmp(*av, "tablearg") == 0) {
4079 action->arg1 = IP_FW_TARG;
4081 if (isalpha(*av[0])) {
4082 if ((code = match_token(f_ipdscp, *av)) == -1)
4083 errx(EX_DATAERR, "Unknown DSCP code");
4084 action->arg1 = code;
4086 action->arg1 = strtoul(*av, NULL, 10);
4088 * Add high-order bit to DSCP to make room
4091 action->arg1 |= 0x8000;
4098 action->opcode = O_REASS;
4102 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4105 case TOK_TCPSETMSS: {
4109 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4111 errx(EX_DATAERR, "pack_object failed");
4112 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4113 NEED1("Missing MSS value");
4114 action = next_cmd(action, &ablen);
4117 mss = strtoul(*av, NULL, 10);
4118 if (mss == 0 || mss > UINT16_MAX)
4119 errx(EX_USAGE, "invalid MSS value %s", *av);
4120 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4127 if (match_token(rule_eactions, *av) == -1)
4128 errx(EX_DATAERR, "invalid action %s\n", *av);
4130 * External actions support.
4131 * XXX: we support only syntax with instance name.
4132 * For known external actions (from rule_eactions list)
4133 * we can handle syntax directly. But with `eaction'
4134 * keyword we can use only `eaction <name> <instance>'
4140 NEED1("Missing eaction name");
4141 if (eaction_check_name(*av) != 0)
4142 errx(EX_DATAERR, "Invalid eaction name %s", *av);
4143 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4145 errx(EX_DATAERR, "pack_object failed");
4146 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4148 NEED1("Missing eaction instance name");
4149 action = next_cmd(action, &ablen);
4152 if (eaction_check_name(*av) != 0)
4153 errx(EX_DATAERR, "Invalid eaction instance name %s",
4156 * External action instance object has TLV type depended
4157 * from the external action name object index. Since we
4158 * currently don't know this index, use zero as TLV type.
4160 idx = pack_object(tstate, *av, 0);
4162 errx(EX_DATAERR, "pack_object failed");
4163 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4167 action = next_cmd(action, &ablen);
4170 * [altq queuename] -- altq tag, optional
4171 * [log [logamount N]] -- log, optional
4173 * If they exist, it go first in the cmdbuf, but then it is
4174 * skipped in the copy section to the end of the buffer.
4176 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4181 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4186 "log cannot be specified more than once");
4187 have_log = (ipfw_insn *)c;
4188 cmd->len = F_INSN_SIZE(ipfw_insn_log);
4190 cmd->opcode = O_LOG;
4191 if (av[0] && _substrcmp(*av, "logamount") == 0) {
4193 NEED1("logamount requires argument");
4197 "logamount must be positive");
4201 len = sizeof(c->max_log);
4202 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4203 &c->max_log, &len, NULL, 0) == -1) {
4208 errx(1, "sysctlbyname(\"%s\")",
4209 "net.inet.ip.fw.verbose_limit");
4218 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4220 NEED1("missing altq queue name");
4223 "altq cannot be specified more than once");
4224 have_altq = (ipfw_insn *)a;
4225 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4227 cmd->opcode = O_ALTQ;
4228 a->qid = altq_name_to_qid(*av);
4239 errx(EX_USAGE, "tag and untag cannot be "
4240 "specified more than once");
4241 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4242 rule_action_params);
4244 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4252 cmd = next_cmd(cmd, &cblen);
4255 if (have_state) { /* must be a check-state, we are done */
4257 match_token(rule_options, *av) == TOK_COMMENT) {
4258 /* check-state has a comment */
4260 fill_comment(cmd, av, cblen);
4261 cmd = next_cmd(cmd, &cblen);
4267 #define OR_START(target) \
4268 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
4270 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4273 if ( (av[0])[1] == '\0') { \
4284 strcmp(*av, ")") == 0 || \
4285 strcmp(*av, "}") == 0)) { \
4290 errx(EX_USAGE, "missing \")\"\n"); \
4294 if (av[0] && _substrcmp(*av, "not") == 0) { \
4295 if (cmd->len & F_NOT) \
4296 errx(EX_USAGE, "double \"not\" not allowed\n"); \
4297 cmd->len |= F_NOT; \
4301 #define OR_BLOCK(target) \
4302 if (av[0] && _substrcmp(*av, "or") == 0) { \
4303 if (prev == NULL || open_par == 0) \
4304 errx(EX_DATAERR, "invalid OR block"); \
4305 prev->len |= F_OR; \
4315 * MAC addresses, optional.
4316 * If we have this, we skip the part "proto from src to dst"
4317 * and jump straight to the option parsing.
4320 NEED1("missing protocol");
4321 if (_substrcmp(*av, "MAC") == 0 ||
4322 _substrcmp(*av, "mac") == 0) {
4323 av++; /* the "MAC" keyword */
4324 add_mac(cmd, av); /* exits in case of errors */
4325 cmd = next_cmd(cmd);
4326 av += 2; /* dst-mac and src-mac */
4328 NEED1("missing mac type");
4329 if (add_mactype(cmd, av[0]))
4330 cmd = next_cmd(cmd);
4331 av++; /* any or mac-type */
4337 * protocol, mandatory
4339 OR_START(get_proto);
4341 NEED1("missing protocol");
4342 if (add_proto_compat(cmd, *av, &proto)) {
4344 if (F_LEN(cmd) != 0) {
4346 cmd = next_cmd(cmd, &cblen);
4348 } else if (first_cmd != cmd) {
4349 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4351 rule->flags |= IPFW_RULE_JUSTOPTS;
4354 OR_BLOCK(get_proto);
4359 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4360 errx(EX_USAGE, "missing ``from''");
4364 * source IP, mandatory
4366 OR_START(source_ip);
4367 NOT_BLOCK; /* optional "not" */
4368 NEED1("missing source address");
4369 if (add_src(cmd, *av, proto, cblen, tstate)) {
4371 if (F_LEN(cmd) != 0) { /* ! any */
4373 cmd = next_cmd(cmd, &cblen);
4376 errx(EX_USAGE, "bad source address %s", *av);
4377 OR_BLOCK(source_ip);
4380 * source ports, optional
4382 NOT_BLOCK; /* optional "not" */
4383 if ( av[0] != NULL ) {
4384 if (_substrcmp(*av, "any") == 0 ||
4385 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4387 if (F_LEN(cmd) != 0)
4388 cmd = next_cmd(cmd, &cblen);
4395 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4396 errx(EX_USAGE, "missing ``to''");
4400 * destination, mandatory
4403 NOT_BLOCK; /* optional "not" */
4404 NEED1("missing dst address");
4405 if (add_dst(cmd, *av, proto, cblen, tstate)) {
4407 if (F_LEN(cmd) != 0) { /* ! any */
4409 cmd = next_cmd(cmd, &cblen);
4412 errx( EX_USAGE, "bad destination address %s", *av);
4416 * dest. ports, optional
4418 NOT_BLOCK; /* optional "not" */
4420 if (_substrcmp(*av, "any") == 0 ||
4421 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4423 if (F_LEN(cmd) != 0)
4424 cmd = next_cmd(cmd, &cblen);
4430 while ( av[0] != NULL ) {
4432 ipfw_insn_u32 *cmd32; /* alias for cmd */
4435 cmd32 = (ipfw_insn_u32 *)cmd;
4437 if (*s == '!') { /* alternate syntax for NOT */
4438 if (cmd->len & F_NOT)
4439 errx(EX_USAGE, "double \"not\" not allowed\n");
4443 i = match_token(rule_options, s);
4447 if (cmd->len & F_NOT)
4448 errx(EX_USAGE, "double \"not\" not allowed\n");
4453 if (open_par == 0 || prev == NULL)
4454 errx(EX_USAGE, "invalid \"or\" block\n");
4458 case TOK_STARTBRACE:
4460 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4466 errx(EX_USAGE, "+missing \")\"\n");
4472 fill_cmd(cmd, O_IN, 0, 0);
4476 cmd->len ^= F_NOT; /* toggle F_NOT */
4477 fill_cmd(cmd, O_IN, 0, 0);
4481 fill_cmd(cmd, O_DIVERTED, 0, 3);
4484 case TOK_DIVERTEDLOOPBACK:
4485 fill_cmd(cmd, O_DIVERTED, 0, 1);
4488 case TOK_DIVERTEDOUTPUT:
4489 fill_cmd(cmd, O_DIVERTED, 0, 2);
4493 fill_cmd(cmd, O_FRAG, 0, 0);
4497 fill_cmd(cmd, O_LAYER2, 0, 0);
4503 NEED1("recv, xmit, via require interface name"
4505 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4507 if (F_LEN(cmd) == 0) /* not a valid address */
4510 cmd->opcode = O_XMIT;
4511 else if (i == TOK_RECV)
4512 cmd->opcode = O_RECV;
4513 else if (i == TOK_VIA)
4514 cmd->opcode = O_VIA;
4518 NEED1("icmptypes requires list of types");
4519 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4523 case TOK_ICMP6TYPES:
4524 NEED1("icmptypes requires list of types");
4525 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4530 NEED1("ipttl requires TTL");
4531 if (strpbrk(*av, "-,")) {
4532 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4533 errx(EX_DATAERR, "invalid ipttl %s", *av);
4535 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4540 NEED1("ipid requires id");
4541 if (strpbrk(*av, "-,")) {
4542 if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4543 errx(EX_DATAERR, "invalid ipid %s", *av);
4545 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4550 NEED1("iplen requires length");
4551 if (strpbrk(*av, "-,")) {
4552 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4553 errx(EX_DATAERR, "invalid ip len %s", *av);
4555 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4560 NEED1("ipver requires version");
4561 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4565 case TOK_IPPRECEDENCE:
4566 NEED1("ipprecedence requires value");
4567 fill_cmd(cmd, O_IPPRECEDENCE, 0,
4568 (strtoul(*av, NULL, 0) & 7) << 5);
4573 NEED1("missing DSCP code");
4574 fill_dscp(cmd, *av, cblen);
4579 NEED1("missing argument for ipoptions");
4580 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4585 NEED1("missing argument for iptos");
4586 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4591 NEED1("uid requires argument");
4597 cmd->opcode = O_UID;
4598 uid = strtoul(*av, &end, 0);
4599 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4601 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4602 cmd32->d[0] = pwd->pw_uid;
4603 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4609 NEED1("gid requires argument");
4615 cmd->opcode = O_GID;
4616 gid = strtoul(*av, &end, 0);
4617 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4619 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4620 cmd32->d[0] = grp->gr_gid;
4621 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4627 NEED1("jail requires argument");
4631 cmd->opcode = O_JAIL;
4632 jid = jail_getid(*av);
4634 errx(EX_DATAERR, "%s", jail_errmsg);
4635 cmd32->d[0] = (uint32_t)jid;
4636 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4642 fill_cmd(cmd, O_ESTAB, 0, 0);
4646 fill_cmd(cmd, O_TCPFLAGS, 0,
4647 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4650 case TOK_TCPDATALEN:
4651 NEED1("tcpdatalen requires length");
4652 if (strpbrk(*av, "-,")) {
4653 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4654 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4656 fill_cmd(cmd, O_TCPDATALEN, 0,
4657 strtoul(*av, NULL, 0));
4662 NEED1("missing argument for tcpoptions");
4663 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4669 NEED1("tcpseq/tcpack requires argument");
4670 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4671 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4672 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4677 NEED1("tcpwin requires length");
4678 if (strpbrk(*av, "-,")) {
4679 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4680 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4682 fill_cmd(cmd, O_TCPWIN, 0,
4683 strtoul(*av, NULL, 0));
4688 NEED1("missing argument for tcpflags");
4689 cmd->opcode = O_TCPFLAGS;
4690 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4695 case TOK_RECORDSTATE: {
4699 errx(EX_USAGE, "keep-state or record-state cannot be part "
4702 errx(EX_USAGE, "only one of keep-state, record-state, "
4703 " limit and set-limit is allowed");
4704 if (*av != NULL && *av[0] == ':') {
4705 if (state_check_name(*av + 1) != 0)
4707 "Invalid state name %s", *av);
4708 uidx = pack_object(tstate, *av + 1,
4709 IPFW_TLV_STATE_NAME);
4712 uidx = pack_object(tstate, default_state_name,
4713 IPFW_TLV_STATE_NAME);
4715 have_rstate = i == TOK_RECORDSTATE;
4716 fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4721 case TOK_SETLIMIT: {
4722 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4727 "limit or set-limit cannot be part of an or block");
4729 errx(EX_USAGE, "only one of keep-state, record-state, "
4730 " limit and set-limit is allowed");
4732 have_rstate = i == TOK_SETLIMIT;
4734 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4736 cmd->opcode = O_LIMIT;
4737 c->limit_mask = c->conn_limit = 0;
4739 while ( av[0] != NULL ) {
4740 if ((val = match_token(limit_masks, *av)) <= 0)
4742 c->limit_mask |= val;
4746 if (c->limit_mask == 0)
4747 errx(EX_USAGE, "limit: missing limit mask");
4749 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4750 TOK_LIMIT, rule_options);
4753 if (*av != NULL && *av[0] == ':') {
4754 if (state_check_name(*av + 1) != 0)
4756 "Invalid state name %s", *av);
4757 cmd->arg1 = pack_object(tstate, *av + 1,
4758 IPFW_TLV_STATE_NAME);
4761 cmd->arg1 = pack_object(tstate,
4762 default_state_name, IPFW_TLV_STATE_NAME);
4767 NEED1("missing protocol");
4768 if (add_proto(cmd, *av, &proto)) {
4771 errx(EX_DATAERR, "invalid protocol ``%s''",
4776 NEED1("missing source IP");
4777 if (add_srcip(cmd, *av, cblen, tstate)) {
4783 NEED1("missing destination IP");
4784 if (add_dstip(cmd, *av, cblen, tstate)) {
4790 NEED1("missing source IP6");
4791 if (add_srcip6(cmd, *av, cblen, tstate)) {
4797 NEED1("missing destination IP6");
4798 if (add_dstip6(cmd, *av, cblen, tstate)) {
4804 NEED1("missing source port");
4805 if (_substrcmp(*av, "any") == 0 ||
4806 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4809 errx(EX_DATAERR, "invalid source port %s", *av);
4813 NEED1("missing destination port");
4814 if (_substrcmp(*av, "any") == 0 ||
4815 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4818 errx(EX_DATAERR, "invalid destination port %s",
4823 if (add_mac(cmd, av, cblen))
4828 NEED1("missing mac type");
4829 if (!add_mactype(cmd, *av, cblen))
4830 errx(EX_DATAERR, "invalid mac type %s", *av);
4834 case TOK_VERREVPATH:
4835 fill_cmd(cmd, O_VERREVPATH, 0, 0);
4838 case TOK_VERSRCREACH:
4839 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4843 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4847 fill_cmd(cmd, O_IPSEC, 0, 0);
4851 fill_cmd(cmd, O_IP6, 0, 0);
4855 fill_cmd(cmd, O_IP4, 0, 0);
4859 fill_ext6hdr( cmd, *av );
4864 if (proto != IPPROTO_IPV6 )
4865 errx( EX_USAGE, "flow-id filter is active "
4866 "only for ipv6 protocol\n");
4867 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4872 fill_comment(cmd, av, cblen);
4877 if (av[0] && strpbrk(*av, "-,")) {
4878 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4879 errx(EX_DATAERR, "tagged: invalid tag"
4885 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4886 TOK_TAGGED, rule_options);
4887 fill_cmd(cmd, O_TAGGED, 0, tag);
4893 NEED1("fib requires fib number");
4894 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4898 fill_cmd(cmd, O_SOCKARG, 0, 0);
4902 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4905 if (!av[0] || !av[1])
4906 errx(EX_USAGE, "format: lookup argument tablenum");
4907 cmd->opcode = O_IP_DST_LOOKUP;
4908 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4909 i = match_token(rule_options, *av);
4910 for (j = 0; lookup_key[j] >= 0 ; j++) {
4911 if (i == lookup_key[j])
4914 if (lookup_key[j] <= 0)
4915 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4916 __PAST_END(c->d, 1) = j; // i converted to option
4919 if ((j = pack_table(tstate, *av)) == 0)
4920 errx(EX_DATAERR, "Invalid table name: %s", *av);
4927 NEED1("missing table name");
4928 if (strncmp(*av, "table(", 6) != 0)
4930 "enclose table name into \"table()\"");
4931 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4935 case TOK_SKIPACTION:
4937 errx(EX_USAGE, "only one defer-action "
4940 fill_cmd(cmd, O_SKIP_ACTION, 0, 0);
4944 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4946 if (F_LEN(cmd) > 0) { /* prepare to advance */
4948 cmd = next_cmd(cmd, &cblen);
4954 if (!have_state && have_skipcmd)
4955 warnx("Rule contains \"defer-immediate-action\" "
4956 "and doesn't contain any state-related options.");
4959 * Now copy stuff into the rule.
4960 * If we have a keep-state option, the first instruction
4961 * must be a PROBE_STATE (which is generated here).
4962 * If we have a LOG option, it was stored as the first command,
4963 * and now must be moved to the top of the action part.
4965 dst = (ipfw_insn *)rule->cmd;
4968 * First thing to write into the command stream is the match probability.
4970 if (match_prob != 1) { /* 1 means always match */
4971 dst->opcode = O_PROB;
4973 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4978 * generate O_PROBE_STATE if necessary
4980 if (have_state && have_state->opcode != O_CHECK_STATE && !have_rstate) {
4981 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4982 dst = next_cmd(dst, &rblen);
4986 * copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG,
4989 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4993 switch (src->opcode) {
5002 bcopy(src, dst, i * sizeof(uint32_t));
5008 * put back the have_state command as last opcode
5010 if (have_state && have_state->opcode != O_CHECK_STATE) {
5011 i = F_LEN(have_state);
5013 bcopy(have_state, dst, i * sizeof(uint32_t));
5018 * put back the have_skipcmd command as very last opcode
5021 i = F_LEN(have_skipcmd);
5023 bcopy(have_skipcmd, dst, i * sizeof(uint32_t));
5028 * start action section
5030 rule->act_ofs = dst - rule->cmd;
5032 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
5034 i = F_LEN(have_log);
5036 bcopy(have_log, dst, i * sizeof(uint32_t));
5040 i = F_LEN(have_altq);
5042 bcopy(have_altq, dst, i * sizeof(uint32_t));
5046 i = F_LEN(have_tag);
5048 bcopy(have_tag, dst, i * sizeof(uint32_t));
5053 * copy all other actions
5055 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
5058 bcopy(src, dst, i * sizeof(uint32_t));
5062 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
5063 *rbufsize = (char *)dst - (char *)rule;
5067 compare_ntlv(const void *_a, const void *_b)
5069 ipfw_obj_ntlv *a, *b;
5071 a = (ipfw_obj_ntlv *)_a;
5072 b = (ipfw_obj_ntlv *)_b;
5074 if (a->set < b->set)
5076 else if (a->set > b->set)
5079 if (a->idx < b->idx)
5081 else if (a->idx > b->idx)
5084 if (a->head.type < b->head.type)
5086 else if (a->head.type > b->head.type)
5093 * Provide kernel with sorted list of referenced objects
5096 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5099 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5107 compare_object_kntlv(const void *k, const void *v)
5109 ipfw_obj_ntlv *ntlv;
5110 struct object_kt key;
5112 key = *((struct object_kt *)k);
5113 ntlv = (ipfw_obj_ntlv *)v;
5115 if (key.uidx < ntlv->idx)
5117 else if (key.uidx > ntlv->idx)
5120 if (key.type < ntlv->head.type)
5122 else if (key.type > ntlv->head.type)
5129 * Finds object name in @ctlv by @idx and @type.
5130 * Uses the following facts:
5131 * 1) All TLVs are the same size
5132 * 2) Kernel implementation provides already sorted list.
5134 * Returns table name or NULL.
5137 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5139 ipfw_obj_ntlv *ntlv;
5140 struct object_kt key;
5145 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5146 compare_object_kntlv);
5149 return (ntlv->name);
5155 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5158 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5162 * Adds one or more rules to ipfw chain.
5167 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5168 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5173 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5174 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5177 * Rules in reply are modified to store their actual ruleset number.
5179 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5180 * according to their idx field and there has to be no duplicates.
5181 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5182 * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5185 ipfw_add(char *av[])
5187 uint32_t rulebuf[1024];
5188 int rbufsize, default_off, tlen, rlen;
5191 struct ip_fw_rule *rule;
5193 ip_fw3_opheader *op3;
5194 ipfw_obj_ctlv *ctlv, *tstate;
5196 rbufsize = sizeof(rulebuf);
5197 memset(rulebuf, 0, rbufsize);
5198 memset(&ts, 0, sizeof(ts));
5200 /* Optimize case with no tables */
5201 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5202 op3 = (ip_fw3_opheader *)rulebuf;
5203 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5204 rule = (struct ip_fw_rule *)(ctlv + 1);
5205 rbufsize -= default_off;
5207 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5208 /* Align rule size to u64 boundary */
5209 rlen = roundup2(rbufsize, sizeof(uint64_t));
5214 if (ts.count != 0) {
5215 /* Some tables. We have to alloc more data */
5216 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5217 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5219 if ((tbuf = calloc(1, sz)) == NULL)
5220 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5221 op3 = (ip_fw3_opheader *)tbuf;
5223 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5224 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5225 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5226 ctlv->count = ts.count;
5227 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5228 memcpy(ctlv + 1, ts.idx, tlen);
5229 object_sort_ctlv(ctlv);
5232 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5233 ctlv->head.type = IPFW_TLV_RULE_LIST;
5234 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5236 memcpy(ctlv + 1, rule, rbufsize);
5238 /* Simply add header */
5239 sz = rlen + default_off;
5240 memset(ctlv, 0, sizeof(*ctlv));
5241 ctlv->head.type = IPFW_TLV_RULE_LIST;
5242 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5246 if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5247 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5250 struct format_opts sfo;
5252 memset(&sfo, 0, sizeof(sfo));
5253 sfo.tstate = tstate;
5254 sfo.set_mask = (uint32_t)(-1);
5255 bp_alloc(&bp, 4096);
5256 show_static_rule(&co, &sfo, &bp, rule, NULL);
5257 printf("%s", bp.buf);
5269 * clear the counters or the log counters.
5270 * optname has the following values:
5271 * 0 (zero both counters and logging)
5272 * 1 (zero logging only)
5275 ipfw_zero(int ac, char *av[], int optname)
5279 char const *name = optname ? "RESETLOG" : "ZERO";
5283 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5287 /* clear all entries */
5288 memset(&rt, 0, sizeof(rt));
5289 rt.flags = IPFW_RCFLAG_ALL;
5290 if (do_range_cmd(optname, &rt) < 0)
5291 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5293 printf("%s.\n", optname == IP_FW_XZERO ?
5294 "Accounting cleared":"Logging counts reset");
5301 if (isdigit(**av)) {
5302 arg = strtonum(*av, 0, 0xffff, &errstr);
5305 "invalid rule number %s\n", *av);
5306 memset(&rt, 0, sizeof(rt));
5307 rt.start_rule = arg;
5309 rt.flags |= IPFW_RCFLAG_RANGE;
5310 if (co.use_set != 0) {
5311 rt.set = co.use_set - 1;
5312 rt.flags |= IPFW_RCFLAG_SET;
5314 if (do_range_cmd(optname, &rt) != 0) {
5315 warn("rule %u: setsockopt(IP_FW_X%s)",
5317 failed = EX_UNAVAILABLE;
5318 } else if (rt.new_set == 0) {
5319 printf("Entry %d not found\n", arg);
5320 failed = EX_UNAVAILABLE;
5321 } else if (!co.do_quiet)
5322 printf("Entry %d %s.\n", arg,
5323 optname == IP_FW_XZERO ?
5324 "cleared" : "logging count reset");
5326 errx(EX_USAGE, "invalid rule number ``%s''", *av);
5330 if (failed != EX_OK)
5335 ipfw_flush(int force)
5339 if (!force && !co.do_quiet) { /* need to ask user */
5342 printf("Are you sure? [yn] ");
5345 c = toupper(getc(stdin));
5346 while (c != '\n' && getc(stdin) != '\n')
5348 return; /* and do not flush */
5349 } while (c != 'Y' && c != 'N');
5351 if (c == 'N') /* user said no */
5358 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5359 memset(&rt, 0, sizeof(rt));
5360 if (co.use_set != 0) {
5361 rt.set = co.use_set - 1;
5362 rt.flags = IPFW_RCFLAG_SET;
5364 rt.flags = IPFW_RCFLAG_ALL;
5365 if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5366 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5368 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5371 static struct _s_x intcmds[] = {
5372 { "talist", TOK_TALIST },
5373 { "iflist", TOK_IFLIST },
5374 { "olist", TOK_OLIST },
5375 { "vlist", TOK_VLIST },
5379 static struct _s_x otypes[] = {
5380 { "EACTION", IPFW_TLV_EACTION },
5381 { "DYNSTATE", IPFW_TLV_STATE_NAME },
5386 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5392 for (i = 0; i < cnt; i++) {
5393 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5395 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5397 name = ntlv[i].name;
5404 ipfw_list_objects(int ac, char *av[])
5406 ipfw_obj_lheader req, *olh;
5407 ipfw_obj_ntlv *ntlv;
5412 memset(&req, 0, sizeof(req));
5414 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5415 if (errno != ENOMEM)
5419 if ((olh = calloc(1, sz)) == NULL)
5423 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5429 printf("Objects list:\n");
5431 printf("There are no objects\n");
5432 ntlv = (ipfw_obj_ntlv *)(olh + 1);
5433 for (i = 0; i < olh->count; i++) {
5434 name = match_value(otypes, ntlv->head.type);
5436 name = lookup_eaction_name(
5437 (ipfw_obj_ntlv *)(olh + 1), olh->count,
5440 printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5441 ntlv->idx, ntlv->head.type, ntlv->name);
5443 printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5444 ntlv->idx, name, ntlv->name);
5451 ipfw_internal_handler(int ac, char *av[])
5456 NEED1("internal cmd required");
5458 if ((tcmd = match_token(intcmds, *av)) == -1)
5459 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5463 ipfw_list_tifaces();
5466 ipfw_list_ta(ac, av);
5469 ipfw_list_objects(ac, av);
5472 ipfw_list_values(ac, av);
5478 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5480 ipfw_obj_lheader req, *olh;
5483 memset(&req, 0, sizeof(req));
5486 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5487 if (errno != ENOMEM)
5492 if ((olh = calloc(1, sz)) == NULL)
5496 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5506 ifinfo_cmp(const void *a, const void *b)
5508 ipfw_iface_info *ia, *ib;
5510 ia = (ipfw_iface_info *)a;
5511 ib = (ipfw_iface_info *)b;
5513 return (stringnum_cmp(ia->ifname, ib->ifname));
5517 * Retrieves table list from kernel,
5518 * optionally sorts it and calls requested function for each table.
5519 * Returns 0 on success.
5524 ipfw_obj_lheader *olh;
5525 ipfw_iface_info *info;
5528 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5529 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5532 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5534 info = (ipfw_iface_info *)(olh + 1);
5535 for (i = 0; i < olh->count; i++) {
5536 if (info->flags & IPFW_IFFLAG_RESOLVED)
5537 printf("%s ifindex: %d refcount: %u changes: %u\n",
5538 info->ifname, info->ifindex, info->refcnt,
5541 printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5542 info->ifname, info->refcnt, info->gencnt);
5543 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);