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>
43 #include <time.h> /* ctime */
44 #include <timeconv.h> /* _long_to_time */
47 #include <stddef.h> /* offsetof */
49 #include <net/ethernet.h>
50 #include <net/if.h> /* only IFNAMSIZ */
51 #include <netinet/in.h>
52 #include <netinet/in_systm.h> /* only n_short, n_long */
53 #include <netinet/ip.h>
54 #include <netinet/ip_icmp.h>
55 #include <netinet/ip_fw.h>
56 #include <netinet/tcp.h>
57 #include <arpa/inet.h>
59 struct cmdline_opts co; /* global options */
65 int show_time; /* show timestamp */
66 uint32_t set_mask; /* enabled sets mask */
67 uint32_t flags; /* request flags */
68 uint32_t first; /* first rule to request */
69 uint32_t last; /* last rule to request */
70 uint32_t dcnt; /* number of dynamic states */
71 ipfw_obj_ctlv *tstate; /* table state data */
74 int resvd_set_number = RESVD_SET;
78 #define CHECK_LENGTH(v, len) do { \
80 errx(EX_DATAERR, "Rule too long"); \
83 * Check if we have enough space in cmd buffer. Note that since
84 * first 8? u32 words are reserved by reserved header, full cmd
85 * buffer can't be used, so we need to protect from buffer overrun
86 * only. At the beginning, cblen is less than actual buffer size by
87 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
88 * for checking small instructions fitting in given range.
89 * We also (ab)use the fact that ipfw_insn is always the first field
90 * for any custom instruction.
92 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
94 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
96 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
97 if (_substrcmp(*av, "tablearg") == 0) { \
106 _xval = strtol(*av, &end, 10); \
108 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
109 errx(EX_DATAERR, "%s: invalid argument: %s", \
110 match_value(s_x, tok), *av); \
112 if (errno == ERANGE || _xval < min || _xval > max) \
113 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
114 match_value(s_x, tok), min, max, *av); \
116 if (_xval == IP_FW_TARG) \
117 errx(EX_DATAERR, "%s: illegal argument value: %s", \
118 match_value(s_x, tok), *av); \
123 static struct _s_x f_tcpflags[] = {
134 static struct _s_x f_tcpopts[] = {
135 { "mss", IP_FW_TCPOPT_MSS },
136 { "maxseg", IP_FW_TCPOPT_MSS },
137 { "window", IP_FW_TCPOPT_WINDOW },
138 { "sack", IP_FW_TCPOPT_SACK },
139 { "ts", IP_FW_TCPOPT_TS },
140 { "timestamp", IP_FW_TCPOPT_TS },
141 { "cc", IP_FW_TCPOPT_CC },
147 * IP options span the range 0 to 255 so we need to remap them
148 * (though in fact only the low 5 bits are significant).
150 static struct _s_x f_ipopts[] = {
151 { "ssrr", IP_FW_IPOPT_SSRR},
152 { "lsrr", IP_FW_IPOPT_LSRR},
153 { "rr", IP_FW_IPOPT_RR},
154 { "ts", IP_FW_IPOPT_TS},
159 static struct _s_x f_iptos[] = {
160 { "lowdelay", IPTOS_LOWDELAY},
161 { "throughput", IPTOS_THROUGHPUT},
162 { "reliability", IPTOS_RELIABILITY},
163 { "mincost", IPTOS_MINCOST},
164 { "congestion", IPTOS_ECN_CE},
165 { "ecntransport", IPTOS_ECN_ECT0},
166 { "ip tos option", 0},
170 struct _s_x f_ipdscp[] = {
171 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */
172 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */
173 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */
174 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */
175 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */
176 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */
177 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */
178 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */
179 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */
180 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */
181 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */
182 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */
183 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
184 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */
185 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
186 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
187 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
188 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
189 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
190 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
191 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
192 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
196 static struct _s_x limit_masks[] = {
197 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
198 {"src-addr", DYN_SRC_ADDR},
199 {"src-port", DYN_SRC_PORT},
200 {"dst-addr", DYN_DST_ADDR},
201 {"dst-port", DYN_DST_PORT},
206 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
207 * This is only used in this code.
209 #define IPPROTO_ETHERTYPE 0x1000
210 static struct _s_x ether_types[] = {
212 * Note, we cannot use "-:&/" in the names because they are field
213 * separators in the type specifications. Also, we use s = NULL as
214 * end-delimiter, because a type of 0 can be legal.
227 { "pppoe_disc", 0x8863 },
228 { "pppoe_sess", 0x8864 },
229 { "ipx_8022", 0x00E0 },
230 { "ipx_8023", 0x0000 },
231 { "ipx_ii", 0x8137 },
232 { "ipx_snap", 0x8137 },
238 static struct _s_x rule_eactions[] = {
239 { "nat64lsn", TOK_NAT64LSN },
240 { "nat64stl", TOK_NAT64STL },
241 { "nptv6", TOK_NPTV6 },
242 { "tcp-setmss", TOK_TCPSETMSS },
243 { NULL, 0 } /* terminator */
246 static struct _s_x rule_actions[] = {
247 { "abort6", TOK_ABORT6 },
248 { "abort", TOK_ABORT },
249 { "accept", TOK_ACCEPT },
250 { "pass", TOK_ACCEPT },
251 { "allow", TOK_ACCEPT },
252 { "permit", TOK_ACCEPT },
253 { "count", TOK_COUNT },
254 { "pipe", TOK_PIPE },
255 { "queue", TOK_QUEUE },
256 { "divert", TOK_DIVERT },
258 { "netgraph", TOK_NETGRAPH },
259 { "ngtee", TOK_NGTEE },
260 { "fwd", TOK_FORWARD },
261 { "forward", TOK_FORWARD },
262 { "skipto", TOK_SKIPTO },
263 { "deny", TOK_DENY },
264 { "drop", TOK_DENY },
265 { "reject", TOK_REJECT },
266 { "reset6", TOK_RESET6 },
267 { "reset", TOK_RESET },
268 { "unreach6", TOK_UNREACH6 },
269 { "unreach", TOK_UNREACH },
270 { "check-state", TOK_CHECKSTATE },
271 { "//", TOK_COMMENT },
273 { "reass", TOK_REASS },
274 { "setfib", TOK_SETFIB },
275 { "setdscp", TOK_SETDSCP },
276 { "call", TOK_CALL },
277 { "return", TOK_RETURN },
278 { "eaction", TOK_EACTION },
279 { "tcp-setmss", TOK_TCPSETMSS },
280 { NULL, 0 } /* terminator */
283 static struct _s_x rule_action_params[] = {
284 { "altq", TOK_ALTQ },
287 { "untag", TOK_UNTAG },
288 { NULL, 0 } /* terminator */
292 * The 'lookup' instruction accepts one of the following arguments.
293 * -1 is a terminator for the list.
294 * Arguments are passed as v[1] in O_DST_LOOKUP options.
296 static int lookup_key[] = {
297 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
298 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
300 static struct _s_x rule_options[] = {
301 { "tagged", TOK_TAGGED },
304 { "jail", TOK_JAIL },
306 { "limit", TOK_LIMIT },
307 { "keep-state", TOK_KEEPSTATE },
308 { "bridged", TOK_LAYER2 },
309 { "layer2", TOK_LAYER2 },
311 { "diverted", TOK_DIVERTED },
312 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
313 { "diverted-output", TOK_DIVERTEDOUTPUT },
314 { "xmit", TOK_XMIT },
315 { "recv", TOK_RECV },
317 { "fragment", TOK_FRAG },
318 { "frag", TOK_FRAG },
320 { "ipoptions", TOK_IPOPTS },
321 { "ipopts", TOK_IPOPTS },
322 { "iplen", TOK_IPLEN },
323 { "ipid", TOK_IPID },
324 { "ipprecedence", TOK_IPPRECEDENCE },
325 { "dscp", TOK_DSCP },
326 { "iptos", TOK_IPTOS },
327 { "ipttl", TOK_IPTTL },
328 { "ipversion", TOK_IPVER },
329 { "ipver", TOK_IPVER },
330 { "estab", TOK_ESTAB },
331 { "established", TOK_ESTAB },
332 { "setup", TOK_SETUP },
333 { "sockarg", TOK_SOCKARG },
334 { "tcpdatalen", TOK_TCPDATALEN },
335 { "tcpflags", TOK_TCPFLAGS },
336 { "tcpflgs", TOK_TCPFLAGS },
337 { "tcpoptions", TOK_TCPOPTS },
338 { "tcpopts", TOK_TCPOPTS },
339 { "tcpseq", TOK_TCPSEQ },
340 { "tcpack", TOK_TCPACK },
341 { "tcpwin", TOK_TCPWIN },
342 { "icmptype", TOK_ICMPTYPES },
343 { "icmptypes", TOK_ICMPTYPES },
344 { "dst-ip", TOK_DSTIP },
345 { "src-ip", TOK_SRCIP },
346 { "dst-port", TOK_DSTPORT },
347 { "src-port", TOK_SRCPORT },
348 { "proto", TOK_PROTO },
351 { "mac-type", TOK_MACTYPE },
352 { "verrevpath", TOK_VERREVPATH },
353 { "versrcreach", TOK_VERSRCREACH },
354 { "antispoof", TOK_ANTISPOOF },
355 { "ipsec", TOK_IPSEC },
356 { "icmp6type", TOK_ICMP6TYPES },
357 { "icmp6types", TOK_ICMP6TYPES },
358 { "ext6hdr", TOK_EXT6HDR},
359 { "flow-id", TOK_FLOWID},
364 { "dst-ipv6", TOK_DSTIP6},
365 { "dst-ip6", TOK_DSTIP6},
366 { "src-ipv6", TOK_SRCIP6},
367 { "src-ip6", TOK_SRCIP6},
368 { "lookup", TOK_LOOKUP},
370 { "//", TOK_COMMENT },
372 { "not", TOK_NOT }, /* pseudo option */
373 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
374 { "or", TOK_OR }, /* pseudo option */
375 { "|", /* escape */ TOK_OR }, /* pseudo option */
376 { "{", TOK_STARTBRACE }, /* pseudo option */
377 { "(", TOK_STARTBRACE }, /* pseudo option */
378 { "}", TOK_ENDBRACE }, /* pseudo option */
379 { ")", TOK_ENDBRACE }, /* pseudo option */
380 { NULL, 0 } /* terminator */
383 void bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg);
384 static int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
385 ipfw_cfg_lheader **pcfg, size_t *psize);
386 static int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
387 ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av);
388 static void ipfw_list_tifaces(void);
391 static uint16_t pack_object(struct tidx *tstate, char *name, int otype);
392 static uint16_t pack_table(struct tidx *tstate, char *name);
394 static char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx);
395 static void object_sort_ctlv(ipfw_obj_ctlv *ctlv);
396 static char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx,
400 * Simple string buffer API.
401 * Used to simplify buffer passing between function and for
402 * transparent overrun handling.
406 * Allocates new buffer of given size @sz.
408 * Returns 0 on success.
411 bp_alloc(struct buf_pr *b, size_t size)
413 memset(b, 0, sizeof(struct buf_pr));
415 if ((b->buf = calloc(1, size)) == NULL)
426 bp_free(struct buf_pr *b)
433 * Flushes buffer so new writer start from beginning.
436 bp_flush(struct buf_pr *b)
445 * Print message specified by @format and args.
446 * Automatically manage buffer space and transparently handle
449 * Returns number of bytes that should have been printed.
452 bprintf(struct buf_pr *b, char *format, ...)
457 va_start(args, format);
459 i = vsnprintf(b->ptr, b->avail, format, args);
462 if (i > b->avail || i < 0) {
463 /* Overflow or print error */
476 * Special values printer for tablearg-aware opcodes.
479 bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg)
483 bprintf(bp, "%s", str);
484 if (arg == IP_FW_TARG)
485 bprintf(bp, "tablearg");
487 bprintf(bp, "%u", arg);
491 * Helper routine to print a possibly unaligned uint64_t on
492 * various platform. If width > 0, print the value with
493 * the desired width, followed by a space;
494 * otherwise, return the required width.
497 pr_u64(struct buf_pr *b, uint64_t *pd, int width)
500 #define U64_FMT "I64"
502 #define U64_FMT "llu"
505 unsigned long long d;
507 bcopy (pd, &u, sizeof(u));
510 bprintf(b, "%*" U64_FMT " ", width, d) :
511 snprintf(NULL, 0, "%" U64_FMT, d) ;
517 safe_calloc(size_t number, size_t size)
519 void *ret = calloc(number, size);
522 err(EX_OSERR, "calloc");
527 safe_realloc(void *ptr, size_t size)
529 void *ret = realloc(ptr, size);
532 err(EX_OSERR, "realloc");
537 * Compare things like interface or table names.
540 stringnum_cmp(const char *a, const char *b)
552 return (strcmp(a, b));
557 * conditionally runs the command.
558 * Selected options or negative -> getsockopt
561 do_cmd(int optname, void *optval, uintptr_t optlen)
568 if (ipfw_socket == -1)
569 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
571 err(EX_UNAVAILABLE, "socket");
573 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
574 optname == IP_FW_ADD || optname == IP_FW3 ||
575 optname == IP_FW_NAT_GET_CONFIG ||
577 optname == IP_FW_NAT_GET_LOG) {
580 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
581 (socklen_t *)optlen);
583 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
589 * do_set3 - pass ipfw control cmd to kernel
590 * @optname: option name
591 * @optval: pointer to option data
592 * @optlen: option length
594 * Assumes op3 header is already embedded.
595 * Calls setsockopt() with IP_FW3 as kernel-visible opcode.
596 * Returns 0 on success or errno otherwise.
599 do_set3(int optname, ip_fw3_opheader *op3, size_t optlen)
605 if (ipfw_socket == -1)
606 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
608 err(EX_UNAVAILABLE, "socket");
610 op3->opcode = optname;
612 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen));
616 * do_get3 - pass ipfw control cmd to kernel
617 * @optname: option name
618 * @optval: pointer to option data
619 * @optlen: pointer to option length
621 * Assumes op3 header is already embedded.
622 * Calls getsockopt() with IP_FW3 as kernel-visible opcode.
623 * Returns 0 on success or errno otherwise.
626 do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
634 if (ipfw_socket == -1)
635 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
637 err(EX_UNAVAILABLE, "socket");
639 op3->opcode = optname;
642 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
649 * match_token takes a table and a string, returns the value associated
650 * with the string (-1 in case of failure).
653 match_token(struct _s_x *table, const char *string)
656 uint i = strlen(string);
658 for (pt = table ; i && pt->s != NULL ; pt++)
659 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
665 * match_token_relaxed takes a table and a string, returns the value associated
666 * with the string for the best match.
669 * value from @table for matched records
670 * -1 for non-matched records
671 * -2 if more than one records match @string.
674 match_token_relaxed(struct _s_x *table, const char *string)
682 for (pt = table ; i != 0 && pt->s != NULL ; pt++) {
683 if (strncmp(pt->s, string, i) != 0)
692 return (c > 0 ? -2: -1);
696 get_token(struct _s_x *table, const char *string, const char *errbase)
700 if ((tcmd = match_token_relaxed(table, string)) < 0)
701 errx(EX_USAGE, "%s %s %s",
702 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
708 * match_value takes a table and a value, returns the string associated
709 * with the value (NULL in case of failure).
712 match_value(struct _s_x *p, int value)
714 for (; p->s != NULL; p++)
721 concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter)
727 for (sz = 0, pt = table ; pt->s != NULL; pt++) {
728 l = snprintf(buf + sz, bufsize - sz, "%s%s",
729 (sz == 0) ? "" : delimiter, pt->s);
740 * helper function to process a set of flags and set bits in the
744 fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set,
747 char *q; /* points to the separator */
749 uint32_t *which; /* mask we are working on */
760 val = match_token(flags, p);
766 *which |= (uint32_t)val;
773 print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set)
775 char const *comma = "";
778 for (i = 0; list[i].x != 0; i++) {
779 if ((set & list[i].x) == 0)
783 l = snprintf(buf, sz, "%s%s", comma, list[i].s);
793 * _substrcmp takes two strings and returns 1 if they do not match,
794 * and 0 if they match exactly or the first string is a sub-string
795 * of the second. A warning is printed to stderr in the case that the
796 * first string is a sub-string of the second.
798 * This function will be removed in the future through the usual
799 * deprecation process.
802 _substrcmp(const char *str1, const char* str2)
805 if (strncmp(str1, str2, strlen(str1)) != 0)
808 if (strlen(str1) != strlen(str2))
809 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
815 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
816 * and 0 if they match exactly or the second string is a sub-string
817 * of the first. A warning is printed to stderr in the case that the
818 * first string does not match the third.
820 * This function exists to warn about the bizarre construction
821 * strncmp(str, "by", 2) which is used to allow people to use a shortcut
822 * for "bytes". The problem is that in addition to accepting "by",
823 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
824 * other string beginning with "by".
826 * This function will be removed in the future through the usual
827 * deprecation process.
830 _substrcmp2(const char *str1, const char* str2, const char* str3)
833 if (strncmp(str1, str2, strlen(str2)) != 0)
836 if (strcmp(str1, str3) != 0)
837 warnx("DEPRECATED: '%s' matched '%s'",
843 * prints one port, symbolic or numeric
846 print_port(struct buf_pr *bp, int proto, uint16_t port)
849 if (proto == IPPROTO_ETHERTYPE) {
852 if (co.do_resolv && (s = match_value(ether_types, port)) )
853 bprintf(bp, "%s", s);
855 bprintf(bp, "0x%04x", port);
857 struct servent *se = NULL;
859 struct protoent *pe = getprotobynumber(proto);
861 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
864 bprintf(bp, "%s", se->s_name);
866 bprintf(bp, "%d", port);
870 static struct _s_x _port_name[] = {
871 {"dst-port", O_IP_DSTPORT},
872 {"src-port", O_IP_SRCPORT},
876 {"mac-type", O_MAC_TYPE},
877 {"tcpdatalen", O_TCPDATALEN},
878 {"tcpwin", O_TCPWIN},
879 {"tagged", O_TAGGED},
884 * Print the values in a list 16-bit items of the types above.
885 * XXX todo: add support for mask.
888 print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode)
890 uint16_t *p = cmd->ports;
895 sep = match_value(_port_name, opcode);
898 bprintf(bp, " %s", sep);
901 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
902 bprintf(bp, "%s", sep);
903 print_port(bp, proto, p[0]);
906 print_port(bp, proto, p[1]);
913 * Like strtol, but also translates service names into port numbers
914 * for some protocols.
916 * proto == -1 disables the protocol check;
917 * proto == IPPROTO_ETHERTYPE looks up an internal table
918 * proto == <some value in /etc/protocols> matches the values there.
919 * Returns *end == s in case the parameter is not found.
922 strtoport(char *s, char **end, int base, int proto)
928 *end = s; /* default - not found */
930 return 0; /* not found */
933 return strtol(s, end, base);
936 * find separator. '\\' escapes the next char.
938 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
939 if (*s1 == '\\' && s1[1] != '\0')
942 buf = safe_calloc(s1 - s + 1, 1);
945 * copy into a buffer skipping backslashes
947 for (p = s, i = 0; p != s1 ; p++)
952 if (proto == IPPROTO_ETHERTYPE) {
953 i = match_token(ether_types, buf);
955 if (i != -1) { /* found */
960 struct protoent *pe = NULL;
964 pe = getprotobynumber(proto);
966 se = getservbyname(buf, pe ? pe->p_name : NULL);
970 return ntohs(se->s_port);
973 return 0; /* not found */
977 * Fill the body of the command with the list of port ranges.
980 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
982 uint16_t a, b, *p = cmd->ports;
987 a = strtoport(av, &s, 0, proto);
988 if (s == av) /* empty or invalid argument */
991 CHECK_LENGTH(cblen, i + 2);
994 case '-': /* a range */
996 b = strtoport(av, &s, 0, proto);
997 /* Reject expressions like '1-abc' or '1-2-3'. */
998 if (s == av || (*s != ',' && *s != '\0'))
1003 case ',': /* comma separated list */
1008 warnx("port list: invalid separator <%c> in <%s>",
1018 if (i + 1 > F_LEN_MASK)
1019 errx(EX_DATAERR, "too many ports/ranges\n");
1020 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
1026 * Fill the body of the command with the list of DiffServ codepoints.
1029 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
1031 uint32_t *low, *high;
1035 cmd->opcode = O_DSCP;
1036 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
1040 low = (uint32_t *)(cmd + 1);
1053 if ((code = match_token(f_ipdscp, s)) == -1)
1054 errx(EX_DATAERR, "Unknown DSCP code");
1056 code = strtoul(s, NULL, 10);
1057 if (code < 0 || code > 63)
1058 errx(EX_DATAERR, "Invalid DSCP value");
1062 *high |= 1 << (code - 32);
1070 static struct _s_x icmpcodes[] = {
1071 { "net", ICMP_UNREACH_NET },
1072 { "host", ICMP_UNREACH_HOST },
1073 { "protocol", ICMP_UNREACH_PROTOCOL },
1074 { "port", ICMP_UNREACH_PORT },
1075 { "needfrag", ICMP_UNREACH_NEEDFRAG },
1076 { "srcfail", ICMP_UNREACH_SRCFAIL },
1077 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
1078 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
1079 { "isolated", ICMP_UNREACH_ISOLATED },
1080 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
1081 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
1082 { "tosnet", ICMP_UNREACH_TOSNET },
1083 { "toshost", ICMP_UNREACH_TOSHOST },
1084 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
1085 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
1086 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
1091 fill_reject_code(u_short *codep, char *str)
1096 val = strtoul(str, &s, 0);
1097 if (s == str || *s != '\0' || val >= 0x100)
1098 val = match_token(icmpcodes, str);
1100 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
1106 print_reject_code(struct buf_pr *bp, uint16_t code)
1110 if ((s = match_value(icmpcodes, code)) != NULL)
1111 bprintf(bp, "unreach %s", s);
1113 bprintf(bp, "unreach %u", code);
1117 * Returns the number of bits set (from left) in a contiguous bitmask,
1118 * or -1 if the mask is not contiguous.
1119 * XXX this needs a proper fix.
1120 * This effectively works on masks in big-endian (network) format.
1121 * when compiled on little endian architectures.
1123 * First bit is bit 7 of the first byte -- note, for MAC addresses,
1124 * the first bit on the wire is bit 0 of the first byte.
1125 * len is the max length in bits.
1128 contigmask(uint8_t *p, int len)
1132 for (i=0; i<len ; i++)
1133 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
1135 for (n=i+1; n < len; n++)
1136 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
1137 return -1; /* mask not contiguous */
1142 * print flags set/clear in the two bitmasks passed as parameters.
1143 * There is a specialized check for f_tcpflags.
1146 print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd,
1149 char const *comma = "";
1151 uint8_t set = cmd->arg1 & 0xff;
1152 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
1154 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
1155 bprintf(bp, " setup");
1159 bprintf(bp, " %s ", name);
1160 for (i=0; list[i].x != 0; i++) {
1161 if (set & list[i].x) {
1163 bprintf(bp, "%s%s", comma, list[i].s);
1166 if (clear & list[i].x) {
1167 clear &= ~list[i].x;
1168 bprintf(bp, "%s!%s", comma, list[i].s);
1176 * Print the ip address contained in a command.
1179 print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd)
1181 struct hostent *he = NULL;
1183 uint32_t len = F_LEN((ipfw_insn *)cmd);
1184 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
1188 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
1190 const char *arg = "<invalid>";
1192 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
1193 arg = match_value(rule_options, lookup_key[d]);
1194 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1195 bprintf(bp, "lookup %s %s", arg, t);
1198 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
1202 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
1203 cmd->o.opcode == O_IP_DST_LOOKUP) {
1204 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1);
1205 bprintf(bp, "table(%s", t);
1206 if (len == F_INSN_SIZE(ipfw_insn_u32))
1207 bprintf(bp, ",%u", *a);
1211 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
1212 uint32_t x, *map = (uint32_t *)&(cmd->mask);
1216 x = cmd->o.arg1 - 1;
1218 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1219 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr),
1220 contigmask((uint8_t *)&x, 32));
1221 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
1222 x &= 0xff; /* base */
1224 * Print bits and ranges.
1225 * Locate first bit set (i), then locate first bit unset (j).
1226 * If we have 3+ consecutive bits set, then print them as a
1227 * range, otherwise only print the initial bit and rescan.
1229 for (i=0; i < cmd->o.arg1; i++)
1230 if (map[i/32] & (1<<(i & 31))) {
1231 for (j=i+1; j < cmd->o.arg1; j++)
1232 if (!(map[ j/32] & (1<<(j & 31))))
1234 bprintf(bp, "%c%d", comma, i+x);
1235 if (j>i+2) { /* range has at least 3 elements */
1236 bprintf(bp, "-%d", j-1+x);
1245 * len == 2 indicates a single IP, whereas lists of 1 or more
1246 * addr/mask pairs have len = (2n+1). We convert len to n so we
1247 * use that to count the number of entries.
1249 for (len = len / 2; len > 0; len--, a += 2) {
1250 int mb = /* mask length */
1251 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
1252 32 : contigmask((uint8_t *)&(a[1]), 32);
1253 if (mb == 32 && co.do_resolv)
1254 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
1255 if (he != NULL) /* resolved to name */
1256 bprintf(bp, "%s", he->h_name);
1257 else if (mb == 0) /* any */
1259 else { /* numeric IP followed by some kind of mask */
1260 ia = (struct in_addr *)&a[0];
1261 bprintf(bp, "%s", inet_ntoa(*ia));
1263 ia = (struct in_addr *)&a[1];
1264 bprintf(bp, ":%s", inet_ntoa(*ia));
1266 bprintf(bp, "/%d", mb);
1274 * prints a MAC address/mask pair
1277 format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask)
1279 int l = contigmask(mask, 48);
1282 bprintf(bp, " any");
1284 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x",
1285 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1287 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x",
1288 mask[0], mask[1], mask[2],
1289 mask[3], mask[4], mask[5]);
1291 bprintf(bp, "/%d", l);
1296 print_mac(struct buf_pr *bp, ipfw_insn_mac *mac)
1299 bprintf(bp, " MAC");
1300 format_mac(bp, mac->addr, mac->mask);
1301 format_mac(bp, mac->addr + 6, mac->mask + 6);
1305 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1314 type = strtoul(av, &av, 0);
1316 if (*av != ',' && *av != '\0')
1317 errx(EX_DATAERR, "invalid ICMP type");
1320 errx(EX_DATAERR, "ICMP type out of range");
1322 cmd->d[0] |= 1 << type;
1324 cmd->o.opcode = O_ICMPTYPE;
1325 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1329 print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1334 bprintf(bp, " icmptypes");
1335 for (i = 0; i < 32; i++) {
1336 if ( (cmd->d[0] & (1 << (i))) == 0)
1338 bprintf(bp, "%c%d", sep, i);
1344 print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd)
1351 bprintf(bp, " dscp");
1354 if (*v & (1 << i)) {
1355 if ((code = match_value(f_ipdscp, i)) != NULL)
1356 bprintf(bp, "%c%s", sep, code);
1358 bprintf(bp, "%c%d", sep, i);
1362 if ((++i % 32) == 0)
1367 #define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd))
1369 struct ip_fw_rule *rule;
1370 const ipfw_insn *eaction;
1373 #define HAVE_PROTO 0x0001
1374 #define HAVE_SRCIP 0x0002
1375 #define HAVE_DSTIP 0x0004
1381 init_show_state(struct show_state *state, struct ip_fw_rule *rule)
1384 state->printed = calloc(rule->cmd_len, sizeof(uint8_t));
1385 if (state->printed == NULL)
1388 state->eaction = NULL;
1391 state->or_block = 0;
1396 free_show_state(struct show_state *state)
1399 free(state->printed);
1403 is_printed_opcode(struct show_state *state, const ipfw_insn *cmd)
1406 return (state->printed[cmd - state->rule->cmd]);
1410 mark_printed(struct show_state *state, const ipfw_insn *cmd)
1413 state->printed[cmd - state->rule->cmd] = 1;
1417 print_limit(struct buf_pr *bp, const ipfw_insn_limit *limit)
1419 struct _s_x *p = limit_masks;
1420 char const *comma = " ";
1423 bprintf(bp, " limit");
1424 for (x = limit->limit_mask; p->x != 0; p++) {
1425 if ((x & p->x) == p->x) {
1427 bprintf(bp, "%s%s", comma, p->s);
1431 bprint_uint_arg(bp, " ", limit->conn_limit);
1435 print_instruction(struct buf_pr *bp, const struct format_opts *fo,
1436 struct show_state *state, ipfw_insn *cmd)
1438 struct protoent *pe;
1444 if (is_printed_opcode(state, cmd))
1446 if ((cmd->len & F_OR) != 0 && state->or_block == 0)
1448 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0)
1449 bprintf(bp, " not");
1451 switch (cmd->opcode) {
1453 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff;
1454 bprintf(bp, "prob %f ", d);
1456 case O_PROBE_STATE: /* no need to print anything here */
1459 case O_IP_SRC_LOOKUP:
1464 case O_IP_DST_LOOKUP:
1468 print_ip(bp, fo, insntod(cmd, ip));
1471 case O_IP6_SRC_MASK:
1474 case O_IP6_DST_MASK:
1476 print_ip6(bp, insntod(cmd, ip6));
1479 print_flow6id(bp, insntod(cmd, u32));
1483 print_newports(bp, insntod(cmd, u16), state->proto,
1484 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) ==
1485 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0);
1488 pe = getprotobynumber(cmd->arg1);
1489 if (state->flags & HAVE_PROTO)
1490 bprintf(bp, " proto");
1492 bprintf(bp, " %s", pe->p_name);
1494 bprintf(bp, " %u", cmd->arg1);
1497 print_mac(bp, insntod(cmd, mac));
1500 print_newports(bp, insntod(cmd, u16),
1501 IPPROTO_ETHERTYPE, cmd->opcode);
1504 bprintf(bp, " frag");
1507 bprintf(bp, " fib %u", cmd->arg1);
1510 bprintf(bp, " sockarg");
1513 bprintf(bp, cmd->len & F_NOT ? " out" : " in");
1516 switch (cmd->arg1) {
1518 bprintf(bp, " diverted");
1521 bprintf(bp, " diverted-output");
1524 bprintf(bp, " diverted-loopback");
1527 bprintf(bp, " diverted-?<%u>", cmd->arg1);
1532 bprintf(bp, " layer2");
1537 if (cmd->opcode == O_XMIT)
1539 else if (cmd->opcode == O_RECV)
1541 else /* if (cmd->opcode == O_VIA) */
1543 switch (insntod(cmd, if)->name[0]) {
1545 bprintf(bp, " %s %s", s,
1546 inet_ntoa(insntod(cmd, if)->p.ip));
1549 bprintf(bp, " %s table(%s)", s,
1550 table_search_ctlv(fo->tstate,
1551 insntod(cmd, if)->p.kidx));
1554 bprintf(bp, " %s %s", s,
1555 insntod(cmd, if)->name);
1558 case O_IP_FLOW_LOOKUP:
1559 s = table_search_ctlv(fo->tstate, cmd->arg1);
1560 bprintf(bp, " flow table(%s", s);
1561 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32))
1562 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]);
1570 if (F_LEN(cmd) == 1) {
1571 switch (cmd->opcode) {
1588 bprintf(bp, " %s %u", s, cmd->arg1);
1590 print_newports(bp, insntod(cmd, u16), 0,
1594 bprintf(bp, " ipver %u", cmd->arg1);
1596 case O_IPPRECEDENCE:
1597 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5);
1600 print_dscp(bp, insntod(cmd, u32));
1603 print_flags(bp, "ipoptions", cmd, f_ipopts);
1606 print_flags(bp, "iptos", cmd, f_iptos);
1609 print_icmptypes(bp, insntod(cmd, u32));
1612 bprintf(bp, " established");
1615 print_flags(bp, "tcpflags", cmd, f_tcpflags);
1618 print_flags(bp, "tcpoptions", cmd, f_tcpopts);
1621 bprintf(bp, " tcpack %d",
1622 ntohl(insntod(cmd, u32)->d[0]));
1625 bprintf(bp, " tcpseq %d",
1626 ntohl(insntod(cmd, u32)->d[0]));
1629 pwd = getpwuid(insntod(cmd, u32)->d[0]);
1631 bprintf(bp, " uid %s", pwd->pw_name);
1633 bprintf(bp, " uid %u",
1634 insntod(cmd, u32)->d[0]);
1637 grp = getgrgid(insntod(cmd, u32)->d[0]);
1639 bprintf(bp, " gid %s", grp->gr_name);
1641 bprintf(bp, " gid %u",
1642 insntod(cmd, u32)->d[0]);
1645 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]);
1648 bprintf(bp, " verrevpath");
1651 bprintf(bp, " versrcreach");
1654 bprintf(bp, " antispoof");
1657 bprintf(bp, " ipsec");
1660 bprintf(bp, " // %s", (char *)(cmd + 1));
1663 bprintf(bp, " keep-state");
1665 object_search_ctlv(fo->tstate, cmd->arg1,
1666 IPFW_TLV_STATE_NAME));
1669 print_limit(bp, insntod(cmd, limit));
1671 object_search_ctlv(fo->tstate, cmd->arg1,
1672 IPFW_TLV_STATE_NAME));
1675 bprintf(bp, " ip6");
1678 bprintf(bp, " ip4");
1681 print_icmp6types(bp, insntod(cmd, u32));
1684 print_ext6hdr(bp, cmd);
1687 if (F_LEN(cmd) == 1)
1688 bprint_uint_arg(bp, " tagged ", cmd->arg1);
1690 print_newports(bp, insntod(cmd, u16),
1694 bprintf(bp, " [opcode %d len %d]", cmd->opcode,
1697 if (cmd->len & F_OR) {
1699 state->or_block = 1;
1700 } else if (state->or_block != 0) {
1702 state->or_block = 0;
1704 mark_printed(state, cmd);
1710 print_opcode(struct buf_pr *bp, struct format_opts *fo,
1711 struct show_state *state, uint8_t opcode)
1716 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1717 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1718 /* We use zero opcode to print the rest of options */
1719 if (opcode != 0 && cmd->opcode != opcode)
1722 * Skip O_NOP, when we printing the rest
1723 * of options, it will be handled separately.
1725 if (cmd->opcode == O_NOP && opcode != O_NOP)
1727 if (!print_instruction(bp, fo, state, cmd))
1735 print_fwd(struct buf_pr *bp, const ipfw_insn *cmd)
1737 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1742 if (cmd->opcode == O_FORWARD_IP) {
1743 sa = insntod(cmd, sa);
1744 port = sa->sa.sin_port;
1745 if (sa->sa.sin_addr.s_addr == INADDR_ANY)
1746 bprintf(bp, "fwd tablearg");
1748 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr));
1750 sa6 = insntod(cmd, sa6);
1751 port = sa6->sa.sin6_port;
1752 bprintf(bp, "fwd ");
1753 if (getnameinfo((const struct sockaddr *)&sa6->sa,
1754 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0,
1755 NI_NUMERICHOST) == 0)
1756 bprintf(bp, "%s", buf);
1759 bprintf(bp, ",%u", port);
1763 print_action_instruction(struct buf_pr *bp, const struct format_opts *fo,
1764 struct show_state *state, const ipfw_insn *cmd)
1768 if (is_printed_opcode(state, cmd))
1770 switch (cmd->opcode) {
1772 bprintf(bp, "check-state");
1774 s = object_search_ctlv(fo->tstate, cmd->arg1,
1775 IPFW_TLV_STATE_NAME);
1778 bprintf(bp, " :%s", s ? s: "any");
1781 bprintf(bp, "allow");
1784 bprintf(bp, "count");
1787 bprintf(bp, "deny");
1790 if (cmd->arg1 == ICMP_REJECT_RST)
1791 bprintf(bp, "reset");
1792 else if (cmd->arg1 == ICMP_REJECT_ABORT)
1793 bprintf(bp, "abort");
1794 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1795 bprintf(bp, "reject");
1797 print_reject_code(bp, cmd->arg1);
1800 if (cmd->arg1 == ICMP6_UNREACH_RST)
1801 bprintf(bp, "reset6");
1802 else if (cmd->arg1 == ICMP6_UNREACH_ABORT)
1803 bprintf(bp, "abort6");
1805 print_unreach6_code(bp, cmd->arg1);
1808 bprint_uint_arg(bp, "skipto ", cmd->arg1);
1811 bprint_uint_arg(bp, "pipe ", cmd->arg1);
1814 bprint_uint_arg(bp, "queue ", cmd->arg1);
1817 bprint_uint_arg(bp, "divert ", cmd->arg1);
1820 bprint_uint_arg(bp, "tee ", cmd->arg1);
1823 bprint_uint_arg(bp, "netgraph ", cmd->arg1);
1826 bprint_uint_arg(bp, "ngtee ", cmd->arg1);
1833 if (insntod(cmd, log)->max_log > 0)
1834 bprintf(bp, " log logamount %d",
1835 insntod(cmd, log)->max_log);
1837 bprintf(bp, " log");
1841 print_altq_cmd(bp, insntod(cmd, altq));
1845 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ":
1846 " tag ", cmd->arg1);
1849 if (cmd->arg1 != IP_FW_NAT44_GLOBAL)
1850 bprint_uint_arg(bp, "nat ", cmd->arg1);
1852 bprintf(bp, "nat global");
1855 if (cmd->arg1 == IP_FW_TARG)
1856 bprint_uint_arg(bp, "setfib ", cmd->arg1);
1858 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF);
1860 case O_EXTERNAL_ACTION:
1862 * The external action can consists of two following
1863 * each other opcodes - O_EXTERNAL_ACTION and
1864 * O_EXTERNAL_INSTANCE. The first contains the ID of
1865 * name of external action. The second contains the ID
1866 * of name of external action instance.
1867 * NOTE: in case when external action has no named
1868 * instances support, the second opcode isn't needed.
1870 state->eaction = cmd;
1871 s = object_search_ctlv(fo->tstate, cmd->arg1,
1873 if (match_token(rule_eactions, s) != -1)
1874 bprintf(bp, "%s", s);
1876 bprintf(bp, "eaction %s", s);
1878 case O_EXTERNAL_INSTANCE:
1879 if (state->eaction == NULL)
1882 * XXX: we need to teach ipfw(9) to rewrite opcodes
1883 * in the user buffer on rule addition. When we add
1884 * the rule, we specify zero TLV type for
1885 * O_EXTERNAL_INSTANCE object. To show correct
1886 * rule after `ipfw add` we need to search instance
1887 * name with zero type. But when we do `ipfw show`
1888 * we calculate TLV type using IPFW_TLV_EACTION_NAME()
1891 s = object_search_ctlv(fo->tstate, cmd->arg1, 0);
1893 s = object_search_ctlv(fo->tstate,
1894 cmd->arg1, IPFW_TLV_EACTION_NAME(
1895 state->eaction->arg1));
1896 bprintf(bp, " %s", s);
1898 case O_EXTERNAL_DATA:
1899 if (state->eaction == NULL)
1902 * Currently we support data formatting only for
1903 * external data with datalen u16. For unknown data
1904 * print its size in bytes.
1906 if (cmd->len == F_INSN_SIZE(ipfw_insn))
1907 bprintf(bp, " %u", cmd->arg1);
1909 bprintf(bp, " %ubytes",
1910 cmd->len * sizeof(uint32_t));
1913 if (cmd->arg1 == IP_FW_TARG) {
1914 bprintf(bp, "setdscp tablearg");
1917 s = match_value(f_ipdscp, cmd->arg1 & 0x3F);
1919 bprintf(bp, "setdscp %s", s);
1921 bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F);
1924 bprintf(bp, "reass");
1927 if (cmd->len & F_NOT)
1928 bprintf(bp, "return");
1930 bprint_uint_arg(bp, "call ", cmd->arg1);
1933 bprintf(bp, "** unrecognized action %d len %d ",
1934 cmd->opcode, cmd->len);
1936 mark_printed(state, cmd);
1943 print_action(struct buf_pr *bp, struct format_opts *fo,
1944 struct show_state *state, uint8_t opcode)
1949 for (l = state->rule->cmd_len - state->rule->act_ofs,
1950 cmd = ACTION_PTR(state->rule); l > 0;
1951 l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1952 if (cmd->opcode != opcode)
1954 if (!print_action_instruction(bp, fo, state, cmd))
1962 print_proto(struct buf_pr *bp, struct format_opts *fo,
1963 struct show_state *state)
1966 int l, proto, ip4, ip6, tmp;
1968 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */
1969 proto = tmp = ip4 = ip6 = 0;
1970 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
1971 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1972 switch (cmd->opcode) {
1978 if (cmd->len & F_OR)
1983 if (cmd->len & F_OR)
1990 if (proto == 0 && ip4 == 0 && ip6 == 0) {
1991 state->proto = IPPROTO_IP;
1992 state->flags |= HAVE_PROTO;
1996 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */
1999 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6);
2000 if (cmd != NULL && (cmd->len & F_OR))
2001 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4);
2002 if (cmd == NULL || (cmd->len & F_OR))
2003 for (l = proto; l > 0; l--) {
2004 cmd = print_opcode(bp, fo, state, O_PROTO);
2005 if (cmd != NULL && (cmd->len & F_OR) == 0)
2009 /* Initialize proto, it is used by print_newports() */
2013 state->proto = IPPROTO_IPV6;
2015 state->proto = IPPROTO_IP;
2016 state->flags |= HAVE_PROTO;
2020 match_opcode(int opcode, const int opcodes[], size_t nops)
2024 for (i = 0; i < nops; i++)
2025 if (opcode == opcodes[i])
2031 print_address(struct buf_pr *bp, struct format_opts *fo,
2032 struct show_state *state, const int opcodes[], size_t nops, int portop,
2036 int count, l, portcnt, pf;
2038 count = portcnt = 0;
2039 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2040 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2041 if (match_opcode(cmd->opcode, opcodes, nops))
2043 else if (cmd->opcode == portop)
2047 bprintf(bp, " any");
2048 for (l = state->rule->act_ofs, cmd = state->rule->cmd;
2049 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2050 if (!match_opcode(cmd->opcode, opcodes, nops))
2052 print_instruction(bp, fo, state, cmd);
2053 if ((cmd->len & F_OR) == 0)
2058 * If several O_IP_?PORT opcodes specified, leave them to the
2062 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0;
2063 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
2064 if (cmd->opcode != portop) {
2065 pf = (cmd->len & F_OR);
2068 /* Print opcode iff it is not in OR block. */
2069 if (pf == 0 && (cmd->len & F_OR) == 0)
2070 print_instruction(bp, fo, state, cmd);
2074 state->flags |= flag;
2077 static const int action_opcodes[] = {
2078 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT,
2079 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE,
2080 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT,
2081 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN,
2082 /* keep the following opcodes at the end of the list */
2083 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA
2086 static const int modifier_opcodes[] = {
2087 O_LOG, O_ALTQ, O_TAG
2090 static const int src_opcodes[] = {
2091 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME,
2092 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME
2095 static const int dst_opcodes[] = {
2096 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME,
2097 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME
2101 show_static_rule(struct cmdline_opts *co, struct format_opts *fo,
2102 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr)
2104 struct show_state state;
2106 static int twidth = 0;
2109 /* Print # DISABLED or skip the rule */
2110 if ((fo->set_mask & (1 << rule->set)) == 0) {
2115 bprintf(bp, "# DISABLED ");
2117 if (init_show_state(&state, rule) != 0) {
2118 warn("init_show_state() failed");
2121 bprintf(bp, "%05u ", rule->rulenum);
2123 /* Print counters if enabled */
2124 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2125 pr_u64(bp, &cntr->pcnt, fo->pcwidth);
2126 pr_u64(bp, &cntr->bcnt, fo->bcwidth);
2129 /* Print timestamp */
2130 if (co->do_time == TIMESTAMP_NUMERIC)
2131 bprintf(bp, "%10u ", cntr->timestamp);
2132 else if (co->do_time == TIMESTAMP_STRING) {
2134 time_t t = (time_t)0;
2137 strcpy(timestr, ctime(&t));
2138 *strchr(timestr, '\n') = '\0';
2139 twidth = strlen(timestr);
2141 if (cntr->timestamp > 0) {
2142 t = _long_to_time(cntr->timestamp);
2144 strcpy(timestr, ctime(&t));
2145 *strchr(timestr, '\n') = '\0';
2146 bprintf(bp, "%s ", timestr);
2148 bprintf(bp, "%*s", twidth, " ");
2152 /* Print set number */
2154 bprintf(bp, "set %d ", rule->set);
2156 /* Print the optional "match probability" */
2157 cmd = print_opcode(bp, fo, &state, O_PROB);
2158 /* Print rule action */
2159 for (i = 0; i < nitems(action_opcodes); i++) {
2160 cmd = print_action(bp, fo, &state, action_opcodes[i]);
2163 /* Handle special cases */
2164 switch (cmd->opcode) {
2167 case O_EXTERNAL_ACTION:
2168 case O_EXTERNAL_INSTANCE:
2169 /* External action can have several instructions */
2174 /* Print rule modifiers */
2175 for (i = 0; i < nitems(modifier_opcodes); i++)
2176 print_action(bp, fo, &state, modifier_opcodes[i]);
2180 if (co->comment_only != 0)
2182 print_proto(bp, fo, &state);
2185 bprintf(bp, " from");
2186 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes),
2187 O_IP_SRCPORT, HAVE_SRCIP);
2189 /* Print destination */
2191 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes),
2192 O_IP_DSTPORT, HAVE_DSTIP);
2194 /* Print the rest of options */
2195 while (print_opcode(bp, fo, &state, 0))
2198 /* Print comment at the end */
2199 cmd = print_opcode(bp, fo, &state, O_NOP);
2200 if (co->comment_only != 0 && cmd == NULL)
2201 bprintf(bp, " // ...");
2203 free_show_state(&state);
2207 show_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2208 struct buf_pr *bp, ipfw_dyn_rule *d)
2210 struct protoent *pe;
2213 char buf[INET6_ADDRSTRLEN];
2215 if (!co->do_expired) {
2216 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
2219 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2220 bprintf(bp, "%05d", rulenum);
2221 if (fo->pcwidth > 0 || fo->bcwidth > 0) {
2223 pr_u64(bp, &d->pcnt, fo->pcwidth);
2224 pr_u64(bp, &d->bcnt, fo->bcwidth);
2225 bprintf(bp, "(%ds)", d->expire);
2227 switch (d->dyn_type) {
2228 case O_LIMIT_PARENT:
2229 bprintf(bp, " PARENT %d", d->count);
2232 bprintf(bp, " LIMIT");
2234 case O_KEEP_STATE: /* bidir, no mask */
2235 bprintf(bp, " STATE");
2239 if ((pe = getprotobynumber(d->id.proto)) != NULL)
2240 bprintf(bp, " %s", pe->p_name);
2242 bprintf(bp, " proto %u", d->id.proto);
2244 if (d->id.addr_type == 4) {
2245 a.s_addr = htonl(d->id.src_ip);
2246 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port);
2248 a.s_addr = htonl(d->id.dst_ip);
2249 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port);
2250 } else if (d->id.addr_type == 6) {
2251 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
2252 sizeof(buf)), d->id.src_port);
2253 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6,
2254 buf, sizeof(buf)), d->id.dst_port);
2256 bprintf(bp, " UNKNOWN <-> UNKNOWN");
2258 bprintf(bp, " :%s", object_search_ctlv(fo->tstate,
2259 d->kidx, IPFW_TLV_STATE_NAME));
2263 do_range_cmd(int cmd, ipfw_range_tlv *rt)
2265 ipfw_range_header rh;
2268 memset(&rh, 0, sizeof(rh));
2269 memcpy(&rh.range, rt, sizeof(*rt));
2270 rh.range.head.length = sizeof(*rt);
2271 rh.range.head.type = IPFW_TLV_RANGE;
2274 if (do_get3(cmd, &rh.opheader, &sz) != 0)
2276 /* Save number of matched objects */
2277 rt->new_set = rh.range.new_set;
2282 * This one handles all set-related commands
2283 * ipfw set { show | enable | disable }
2285 * ipfw set move X to Y
2286 * ipfw set move rule X to Y
2289 ipfw_sets_handler(char *av[])
2300 memset(&rt, 0, sizeof(rt));
2303 errx(EX_USAGE, "set needs command");
2304 if (_substrcmp(*av, "show") == 0) {
2305 struct format_opts fo;
2306 ipfw_cfg_lheader *cfg;
2308 memset(&fo, 0, sizeof(fo));
2309 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0)
2310 err(EX_OSERR, "requesting config failed");
2312 for (i = 0, msg = "disable"; i < RESVD_SET; i++)
2313 if ((cfg->set_mask & (1<<i)) == 0) {
2314 printf("%s %d", msg, i);
2317 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable";
2318 for (i = 0; i < RESVD_SET; i++)
2319 if ((cfg->set_mask & (1<<i)) != 0) {
2320 printf("%s %d", msg, i);
2325 } else if (_substrcmp(*av, "swap") == 0) {
2327 if ( av[0] == NULL || av[1] == NULL )
2328 errx(EX_USAGE, "set swap needs 2 set numbers\n");
2329 rt.set = atoi(av[0]);
2330 rt.new_set = atoi(av[1]);
2331 if (!isdigit(*(av[0])) || rt.set > RESVD_SET)
2332 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
2333 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET)
2334 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
2335 i = do_range_cmd(IP_FW_SET_SWAP, &rt);
2336 } else if (_substrcmp(*av, "move") == 0) {
2338 if (av[0] && _substrcmp(*av, "rule") == 0) {
2339 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */
2343 cmd = IP_FW_SET_MOVE; /* Move set to new one */
2344 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
2345 av[3] != NULL || _substrcmp(av[1], "to") != 0)
2346 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
2347 rulenum = atoi(av[0]);
2348 rt.new_set = atoi(av[2]);
2349 if (cmd == IP_FW_XMOVE) {
2350 rt.start_rule = rulenum;
2351 rt.end_rule = rulenum;
2354 rt.new_set = atoi(av[2]);
2355 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) ||
2356 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) )
2357 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
2358 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET)
2359 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
2360 i = do_range_cmd(cmd, &rt);
2362 err(EX_OSERR, "failed to move %s",
2363 cmd == IP_FW_SET_MOVE ? "set": "rule");
2364 } else if (_substrcmp(*av, "disable") == 0 ||
2365 _substrcmp(*av, "enable") == 0 ) {
2366 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
2369 masks[0] = masks[1] = 0;
2372 if (isdigit(**av)) {
2374 if (i < 0 || i > RESVD_SET)
2376 "invalid set number %d\n", i);
2377 masks[which] |= (1<<i);
2378 } else if (_substrcmp(*av, "disable") == 0)
2380 else if (_substrcmp(*av, "enable") == 0)
2384 "invalid set command %s\n", *av);
2387 if ( (masks[0] & masks[1]) != 0 )
2389 "cannot enable and disable the same set\n");
2392 rt.new_set = masks[1];
2393 i = do_range_cmd(IP_FW_SET_ENABLE, &rt);
2395 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)");
2397 errx(EX_USAGE, "invalid set command %s\n", *av);
2401 ipfw_sysctl_handler(char *av[], int which)
2405 if (av[0] == NULL) {
2406 warnx("missing keyword to enable/disable\n");
2407 } else if (_substrcmp(*av, "firewall") == 0) {
2408 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
2409 &which, sizeof(which));
2410 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
2411 &which, sizeof(which));
2412 } else if (_substrcmp(*av, "one_pass") == 0) {
2413 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
2414 &which, sizeof(which));
2415 } else if (_substrcmp(*av, "debug") == 0) {
2416 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
2417 &which, sizeof(which));
2418 } else if (_substrcmp(*av, "verbose") == 0) {
2419 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
2420 &which, sizeof(which));
2421 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
2422 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
2423 &which, sizeof(which));
2425 } else if (_substrcmp(*av, "altq") == 0) {
2426 altq_set_enabled(which);
2429 warnx("unrecognize enable/disable keyword: %s\n", *av);
2433 typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo,
2434 void *arg, void *state);
2437 prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo,
2438 void *arg, void *_state)
2444 d = (ipfw_dyn_rule *)_state;
2445 /* Count _ALL_ states */
2448 if (fo->show_counters == 0)
2452 /* skip states from another set */
2453 bcopy((char *)&d->rule + sizeof(uint16_t), &set,
2455 if (set != co->use_set - 1)
2459 width = pr_u64(NULL, &d->pcnt, 0);
2460 if (width > fo->pcwidth)
2461 fo->pcwidth = width;
2463 width = pr_u64(NULL, &d->bcnt, 0);
2464 if (width > fo->bcwidth)
2465 fo->bcwidth = width;
2469 foreach_state(struct cmdline_opts *co, struct format_opts *fo,
2470 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg)
2476 ipfw_obj_ctlv *ctlv;
2482 ctlv = (ipfw_obj_ctlv *)base;
2483 switch (ctlv->head.type) {
2484 case IPFW_TLV_DYNSTATE_LIST:
2485 base += sizeof(*ctlv);
2486 sz -= sizeof(*ctlv);
2487 ttype = IPFW_TLV_DYN_ENT;
2496 tlv = (ipfw_obj_tlv *)base;
2497 if (tlv->type != ttype)
2500 fptr(co, fo, farg, tlv + 1);
2502 base += tlv->length;
2510 prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo,
2511 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz)
2513 int bcwidth, pcwidth, width;
2515 struct ip_fw_bcounter *cntr;
2516 struct ip_fw_rule *r;
2520 if (fo->show_counters != 0) {
2521 for (n = 0; n < rcnt; n++,
2522 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2523 cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2524 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2525 /* skip rules from another set */
2526 if (co->use_set && r->set != co->use_set - 1)
2529 /* packet counter */
2530 width = pr_u64(NULL, &cntr->pcnt, 0);
2531 if (width > pcwidth)
2535 width = pr_u64(NULL, &cntr->bcnt, 0);
2536 if (width > bcwidth)
2540 fo->bcwidth = bcwidth;
2541 fo->pcwidth = pcwidth;
2544 if (co->do_dynamic && dynsz > 0)
2545 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL);
2549 list_static_range(struct cmdline_opts *co, struct format_opts *fo,
2550 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt)
2553 struct ip_fw_rule *r;
2554 struct ip_fw_bcounter *cntr;
2557 for (n = seen = 0; n < rcnt; n++,
2558 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) {
2560 if ((fo->show_counters | fo->show_time) != 0) {
2561 cntr = (struct ip_fw_bcounter *)(rtlv + 1);
2562 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size);
2565 r = (struct ip_fw_rule *)(rtlv + 1);
2567 if (r->rulenum > fo->last)
2569 if (co->use_set && r->set != co->use_set - 1)
2571 if (r->rulenum >= fo->first && r->rulenum <= fo->last) {
2572 show_static_rule(co, fo, bp, r, cntr);
2573 printf("%s", bp->buf);
2584 list_dyn_state(struct cmdline_opts *co, struct format_opts *fo,
2585 void *_arg, void *_state)
2592 d = (ipfw_dyn_rule *)_state;
2593 bp = (struct buf_pr *)_arg;
2595 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2596 if (rulenum > fo->last)
2599 bcopy((char *)&d->rule + sizeof(uint16_t),
2600 &set, sizeof(uint8_t));
2601 if (set != co->use_set - 1)
2604 if (rulenum >= fo->first) {
2605 show_dyn_state(co, fo, bp, d);
2606 printf("%s\n", bp->buf);
2612 list_dyn_range(struct cmdline_opts *co, struct format_opts *fo,
2613 struct buf_pr *bp, caddr_t base, size_t sz)
2616 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp);
2621 ipfw_list(int ac, char *av[], int show_counters)
2623 ipfw_cfg_lheader *cfg;
2624 struct format_opts sfo;
2633 fprintf(stderr, "Testing only, list disabled\n");
2637 dummynet_list(ac, av, show_counters);
2643 memset(&sfo, 0, sizeof(sfo));
2645 /* Determine rule range to request */
2647 for (lac = ac, lav = av; lac != 0; lac--) {
2648 rnum = strtoul(*lav++, &endptr, 10);
2649 if (sfo.first == 0 || rnum < sfo.first)
2653 rnum = strtoul(endptr + 1, &endptr, 10);
2654 if (sfo.last == 0 || rnum > sfo.last)
2659 /* get configuraion from kernel */
2661 sfo.show_counters = show_counters;
2662 sfo.show_time = co.do_time;
2663 sfo.flags = IPFW_CFG_GET_STATIC;
2664 if (co.do_dynamic != 0)
2665 sfo.flags |= IPFW_CFG_GET_STATES;
2666 if ((sfo.show_counters | sfo.show_time) != 0)
2667 sfo.flags |= IPFW_CFG_GET_COUNTERS;
2668 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0)
2669 err(EX_OSERR, "retrieving config failed");
2671 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av);
2680 ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo,
2681 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[])
2686 int exitval = EX_OK;
2692 ipfw_obj_ctlv *ctlv, *tstate;
2693 ipfw_obj_tlv *rbase;
2696 * Handle tablenames TLV first, if any
2702 readsz = sizeof(*cfg);
2705 fo->set_mask = cfg->set_mask;
2707 ctlv = (ipfw_obj_ctlv *)(cfg + 1);
2709 if (cfg->flags & IPFW_CFG_GET_STATIC) {
2710 /* We've requested static rules */
2711 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) {
2712 object_sort_ctlv(ctlv);
2714 readsz += ctlv->head.length;
2715 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2719 if (ctlv->head.type == IPFW_TLV_RULE_LIST) {
2720 rbase = (ipfw_obj_tlv *)(ctlv + 1);
2722 readsz += ctlv->head.length;
2723 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv +
2728 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) {
2729 /* We may have some dynamic states */
2730 dynsz = sz - readsz;
2731 /* Skip empty header */
2732 if (dynsz != sizeof(ipfw_obj_ctlv))
2733 dynbase = (caddr_t)ctlv;
2738 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz);
2739 bp_alloc(&bp, 4096);
2741 /* if no rule numbers were specified, list all rules */
2744 fo->last = IPFW_DEFAULT_RULE;
2745 list_static_range(co, fo, &bp, rbase, rcnt);
2747 if (co->do_dynamic && dynsz > 0) {
2748 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz);
2749 list_dyn_range(co, fo, &bp, dynbase, dynsz);
2756 /* display specific rules requested on command line */
2757 for (lac = ac, lav = av; lac != 0; lac--) {
2758 /* convert command line rule # */
2759 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2761 fo->last = strtoul(endptr + 1, &endptr, 10);
2764 warnx("invalid rule number: %s", *(lav - 1));
2768 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) {
2769 /* give precedence to other error(s) */
2770 if (exitval == EX_OK)
2771 exitval = EX_UNAVAILABLE;
2772 if (fo->first == fo->last)
2773 warnx("rule %u does not exist", fo->first);
2775 warnx("no rules in range %u-%u",
2776 fo->first, fo->last);
2780 if (co->do_dynamic && dynsz > 0) {
2781 printf("## Dynamic rules:\n");
2782 for (lac = ac, lav = av; lac != 0; lac--) {
2783 fo->last = fo->first = strtoul(*lav++, &endptr, 10);
2785 fo->last = strtoul(endptr+1, &endptr, 10);
2787 /* already warned */
2789 list_dyn_range(co, fo, &bp, dynbase, dynsz);
2799 * Retrieves current ipfw configuration of given type
2800 * and stores its pointer to @pcfg.
2802 * Caller is responsible for freeing @pcfg.
2804 * Returns 0 on success.
2808 ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo,
2809 ipfw_cfg_lheader **pcfg, size_t *psize)
2811 ipfw_cfg_lheader *cfg;
2816 if (co->test_only != 0) {
2817 fprintf(stderr, "Testing only, list disabled\n");
2821 /* Start with some data size */
2825 for (i = 0; i < 16; i++) {
2828 if ((cfg = calloc(1, sz)) == NULL)
2831 cfg->flags = fo->flags;
2832 cfg->start_rule = fo->first;
2833 cfg->end_rule = fo->last;
2835 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) {
2836 if (errno != ENOMEM) {
2841 /* Buffer size is not enough. Try to increase */
2858 lookup_host (char *host, struct in_addr *ipaddr)
2862 if (!inet_aton(host, ipaddr)) {
2863 if ((he = gethostbyname(host)) == NULL)
2865 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2879 ipfw_check_object_name(const char *name)
2884 * Check that name is null-terminated and contains
2885 * valid symbols only. Valid mask is:
2886 * [a-zA-Z0-9\-_\.]{1,63}
2889 if (l == 0 || l >= 64)
2891 for (i = 0; i < l; i++) {
2893 if (isalpha(c) || isdigit(c) || c == '_' ||
2894 c == '-' || c == '.')
2901 static char *default_state_name = "default";
2903 state_check_name(const char *name)
2906 if (ipfw_check_object_name(name) != 0)
2908 if (strcmp(name, "any") == 0)
2914 eaction_check_name(const char *name)
2917 if (ipfw_check_object_name(name) != 0)
2919 /* Restrict some 'special' names */
2920 if (match_token(rule_actions, name) != -1 &&
2921 match_token(rule_action_params, name) != -1)
2927 pack_object(struct tidx *tstate, char *name, int otype)
2930 ipfw_obj_ntlv *ntlv;
2932 for (i = 0; i < tstate->count; i++) {
2933 if (strcmp(tstate->idx[i].name, name) != 0)
2935 if (tstate->idx[i].set != tstate->set)
2937 if (tstate->idx[i].head.type != otype)
2940 return (tstate->idx[i].idx);
2943 if (tstate->count + 1 > tstate->size) {
2945 tstate->idx = realloc(tstate->idx, tstate->size *
2946 sizeof(ipfw_obj_ntlv));
2947 if (tstate->idx == NULL)
2951 ntlv = &tstate->idx[i];
2952 memset(ntlv, 0, sizeof(ipfw_obj_ntlv));
2953 strlcpy(ntlv->name, name, sizeof(ntlv->name));
2954 ntlv->head.type = otype;
2955 ntlv->head.length = sizeof(ipfw_obj_ntlv);
2956 ntlv->set = tstate->set;
2957 ntlv->idx = ++tstate->counter;
2964 pack_table(struct tidx *tstate, char *name)
2967 if (table_check_name(name) != 0)
2970 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME));
2974 fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode,
2975 struct tidx *tstate)
2977 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2981 if ((p = strchr(av + 6, ')')) == NULL)
2982 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av);
2984 p = strchr(av + 6, ',');
2988 if ((uidx = pack_table(tstate, av + 6)) == 0)
2989 errx(EX_DATAERR, "Invalid table name: %s", av + 6);
2991 cmd->opcode = opcode;
2994 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
2995 d[0] = strtoul(p, NULL, 0);
2997 cmd->len |= F_INSN_SIZE(ipfw_insn);
3002 * fills the addr and mask fields in the instruction as appropriate from av.
3003 * Update length as appropriate.
3004 * The following formats are allowed:
3005 * me returns O_IP_*_ME
3006 * 1.2.3.4 single IP address
3007 * 1.2.3.4:5.6.7.8 address:mask
3008 * 1.2.3.4/24 address/mask
3009 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
3010 * We can have multiple comma-separated address/mask entries.
3013 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate)
3016 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
3018 cmd->o.len &= ~F_LEN_MASK; /* zero len */
3020 if (_substrcmp(av, "any") == 0)
3023 if (_substrcmp(av, "me") == 0) {
3024 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
3028 if (strncmp(av, "table(", 6) == 0) {
3029 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate);
3035 * After the address we can have '/' or ':' indicating a mask,
3036 * ',' indicating another address follows, '{' indicating a
3037 * set of addresses of unspecified size.
3039 char *t = NULL, *p = strpbrk(av, "/:,{");
3043 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
3048 if ((t = strpbrk(p, ",{")) != NULL) {
3055 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
3056 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
3059 if (!inet_aton(p, (struct in_addr *)&d[1]))
3060 errx(EX_DATAERR, "bad netmask ``%s''", p);
3065 d[1] = htonl(0U); /* mask */
3066 else if (masklen > 32)
3067 errx(EX_DATAERR, "bad width ``%s''", p);
3069 d[1] = htonl(~0U << (32 - masklen));
3071 case '{': /* no mask, assume /24 and put back the '{' */
3072 d[1] = htonl(~0U << (32 - 24));
3076 case ',': /* single address plus continuation */
3079 case 0: /* initialization value */
3081 d[1] = htonl(~0U); /* force /32 */
3084 d[0] &= d[1]; /* mask base address with mask */
3087 /* find next separator */
3089 p = strpbrk(p, ",{");
3090 if (p && *p == '{') {
3092 * We have a set of addresses. They are stored as follows:
3093 * arg1 is the set size (powers of 2, 2..256)
3094 * addr is the base address IN HOST FORMAT
3095 * mask.. is an array of arg1 bits (rounded up to
3096 * the next multiple of 32) with bits set
3097 * for each host in the map.
3099 uint32_t *map = (uint32_t *)&cmd->mask;
3101 int i = contigmask((uint8_t *)&(d[1]), 32);
3104 errx(EX_DATAERR, "address set cannot be in a list");
3105 if (i < 24 || i > 31)
3106 errx(EX_DATAERR, "invalid set with mask %d\n", i);
3107 cmd->o.arg1 = 1<<(32-i); /* map length */
3108 d[0] = ntohl(d[0]); /* base addr in host format */
3109 cmd->o.opcode = O_IP_DST_SET; /* default */
3110 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
3111 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
3112 map[i] = 0; /* clear map */
3116 high = low + cmd->o.arg1 - 1;
3118 * Here, i stores the previous value when we specify a range
3119 * of addresses within a mask, e.g. 45-63. i = -1 means we
3120 * have no previous value.
3122 i = -1; /* previous value in a range */
3123 while (isdigit(*av)) {
3125 int a = strtol(av, &s, 0);
3127 if (s == av) { /* no parameter */
3129 errx(EX_DATAERR, "set not closed\n");
3131 errx(EX_DATAERR, "incomplete range %d-", i);
3134 if (a < low || a > high)
3135 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
3138 if (i == -1) /* no previous in range */
3140 else { /* check that range is valid */
3142 errx(EX_DATAERR, "invalid range %d-%d",
3145 errx(EX_DATAERR, "double '-' in range");
3148 map[i/32] |= 1<<(i & 31);
3159 if (av) /* then *av must be a ',' */
3162 /* Check this entry */
3163 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
3165 * 'any' turns the entire list into a NOP.
3166 * 'not any' never matches, so it is removed from the
3167 * list unless it is the only item, in which case we
3170 if (cmd->o.len & F_NOT) { /* "not any" never matches */
3171 if (av == NULL && len == 0) /* only this entry */
3172 errx(EX_DATAERR, "not any never matches");
3174 /* else do nothing and skip this entry */
3177 /* A single IP can be stored in an optimized format */
3178 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
3179 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
3182 len += 2; /* two words... */
3185 if (len + 1 > F_LEN_MASK)
3186 errx(EX_DATAERR, "address list too long");
3187 cmd->o.len |= len+1;
3191 /* n2mask sets n bits of the mask */
3193 n2mask(struct in6_addr *mask, int n)
3195 static int minimask[9] =
3196 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
3199 memset(mask, 0, sizeof(struct in6_addr));
3200 p = (u_char *) mask;
3201 for (; n > 0; p++, n -= 8) {
3211 fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode,
3212 struct _s_x *flags, char *p)
3215 uint32_t set = 0, clear = 0;
3217 if (fill_flags(flags, p, &e, &set, &clear) != 0)
3218 errx(EX_DATAERR, "invalid flag %s", e);
3220 cmd->opcode = opcode;
3221 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
3222 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
3227 ipfw_delete(char *av[])
3232 int exitval = EX_OK;
3236 NEED1("missing rule specification");
3237 if ( *av && _substrcmp(*av, "set") == 0) {
3238 /* Do not allow using the following syntax:
3239 * ipfw set N delete set M
3242 errx(EX_DATAERR, "invalid syntax");
3243 do_set = 1; /* delete set */
3248 while (*av && isdigit(**av)) {
3249 i = strtol(*av, &sep, 10);
3252 j = strtol(sep + 1, NULL, 10);
3255 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
3257 exitval = EX_UNAVAILABLE;
3258 warn("rule %u not available", i);
3260 } else if (co.do_pipe) {
3261 exitval = ipfw_delete_pipe(co.do_pipe, i);
3263 memset(&rt, 0, sizeof(rt));
3266 rt.flags = IPFW_RCFLAG_SET;
3268 rt.start_rule = i & 0xffff;
3269 rt.end_rule = j & 0xffff;
3270 if (rt.start_rule == 0 && rt.end_rule == 0)
3271 rt.flags |= IPFW_RCFLAG_ALL;
3273 rt.flags |= IPFW_RCFLAG_RANGE;
3274 if (co.use_set != 0) {
3275 rt.set = co.use_set - 1;
3276 rt.flags |= IPFW_RCFLAG_SET;
3279 i = do_range_cmd(IP_FW_XDEL, &rt);
3281 exitval = EX_UNAVAILABLE;
3282 warn("rule %u: setsockopt(IP_FW_XDEL)",
3284 } else if (rt.new_set == 0 && do_set == 0) {
3285 exitval = EX_UNAVAILABLE;
3286 if (rt.start_rule != rt.end_rule)
3287 warnx("no rules rules in %u-%u range",
3288 rt.start_rule, rt.end_rule);
3290 warnx("rule %u not found",
3295 if (exitval != EX_OK)
3301 * fill the interface structure. We do not check the name as we can
3302 * create interfaces dynamically, so checking them at insert time
3303 * makes relatively little sense.
3304 * Interface names containing '*', '?', or '[' are assumed to be shell
3305 * patterns which match interfaces.
3308 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate)
3313 cmd->name[0] = '\0';
3314 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
3318 /* Parse the interface or address */
3319 if (strcmp(arg, "any") == 0)
3320 cmd->o.len = 0; /* effectively ignore this command */
3321 else if (strncmp(arg, "table(", 6) == 0) {
3322 if ((p = strchr(arg + 6, ')')) == NULL)
3323 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg);
3325 p = strchr(arg + 6, ',');
3328 if ((uidx = pack_table(tstate, arg + 6)) == 0)
3329 errx(EX_DATAERR, "Invalid table name: %s", arg + 6);
3331 cmd->name[0] = '\1'; /* Special value indicating table */
3333 } else if (!isdigit(*arg)) {
3334 strlcpy(cmd->name, arg, sizeof(cmd->name));
3335 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
3336 } else if (!inet_aton(arg, &cmd->p.ip))
3337 errx(EX_DATAERR, "bad ip address ``%s''", arg);
3341 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
3345 char *ap, *ptr, *optr;
3346 struct ether_addr *mac;
3347 const char *macset = "0123456789abcdefABCDEF:";
3349 if (strcmp(p, "any") == 0) {
3350 for (i = 0; i < ETHER_ADDR_LEN; i++)
3351 addr[i] = mask[i] = 0;
3355 optr = ptr = strdup(p);
3356 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
3358 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
3359 errx(EX_DATAERR, "Incorrect MAC address");
3360 bcopy(mac, addr, ETHER_ADDR_LEN);
3362 errx(EX_DATAERR, "Incorrect MAC address");
3364 if (ptr != NULL) { /* we have mask? */
3365 if (p[ptr - optr - 1] == '/') { /* mask len */
3366 long ml = strtol(ptr, &ap, 10);
3367 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
3368 errx(EX_DATAERR, "Incorrect mask length");
3369 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
3370 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
3373 if (strspn(ptr, macset) != l ||
3374 (mac = ether_aton(ptr)) == NULL)
3375 errx(EX_DATAERR, "Incorrect mask");
3376 bcopy(mac, mask, ETHER_ADDR_LEN);
3378 } else { /* default mask: ff:ff:ff:ff:ff:ff */
3379 for (i = 0; i < ETHER_ADDR_LEN; i++)
3382 for (i = 0; i < ETHER_ADDR_LEN; i++)
3389 * helper function, updates the pointer to cmd with the length
3390 * of the current command, and also cleans up the first word of
3391 * the new command in case it has been clobbered before.
3394 next_cmd(ipfw_insn *cmd, int *len)
3397 CHECK_LENGTH(*len, 0);
3399 bzero(cmd, sizeof(*cmd));
3404 * Takes arguments and copies them into a comment
3407 fill_comment(ipfw_insn *cmd, char **av, int cblen)
3410 char *p = (char *)(cmd + 1);
3412 cmd->opcode = O_NOP;
3413 cmd->len = (cmd->len & (F_NOT | F_OR));
3415 /* Compute length of comment string. */
3416 for (i = 0, l = 0; av[i] != NULL; i++)
3417 l += strlen(av[i]) + 1;
3422 "comment too long (max 80 chars)");
3424 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
3427 for (i = 0; av[i] != NULL; i++) {
3436 * A function to fill simple commands of size 1.
3437 * Existing flags are preserved.
3440 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
3442 cmd->opcode = opcode;
3443 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
3448 * Fetch and add the MAC address and type, with masks. This generates one or
3449 * two microinstructions, and returns the pointer to the last one.
3452 add_mac(ipfw_insn *cmd, char *av[], int cblen)
3456 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
3457 errx(EX_DATAERR, "MAC dst src");
3459 cmd->opcode = O_MACADDR2;
3460 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
3463 mac = (ipfw_insn_mac *)cmd;
3464 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
3465 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
3466 &(mac->mask[ETHER_ADDR_LEN])); /* src */
3471 add_mactype(ipfw_insn *cmd, char *av, int cblen)
3474 errx(EX_DATAERR, "missing MAC type");
3475 if (strcmp(av, "any") != 0) { /* we have a non-null type */
3476 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
3478 cmd->opcode = O_MAC_TYPE;
3485 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
3487 struct protoent *pe;
3491 proto = strtol(av, &ep, 10);
3492 if (*ep != '\0' || proto <= 0) {
3493 if ((pe = getprotobyname(av)) == NULL)
3495 proto = pe->p_proto;
3498 fill_cmd(cmd, O_PROTO, 0, proto);
3504 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
3506 u_char proto = IPPROTO_IP;
3508 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3509 ; /* do not set O_IP4 nor O_IP6 */
3510 else if (strcmp(av, "ip4") == 0)
3511 /* explicit "just IPv4" rule */
3512 fill_cmd(cmd, O_IP4, 0, 0);
3513 else if (strcmp(av, "ip6") == 0) {
3514 /* explicit "just IPv6" rule */
3515 proto = IPPROTO_IPV6;
3516 fill_cmd(cmd, O_IP6, 0, 0);
3518 return add_proto0(cmd, av, protop);
3525 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
3527 u_char proto = IPPROTO_IP;
3529 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
3530 ; /* do not set O_IP4 nor O_IP6 */
3531 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
3532 /* explicit "just IPv4" rule */
3533 fill_cmd(cmd, O_IP4, 0, 0);
3534 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
3535 /* explicit "just IPv6" rule */
3536 proto = IPPROTO_IPV6;
3537 fill_cmd(cmd, O_IP6, 0, 0);
3539 return add_proto0(cmd, av, protop);
3546 add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3548 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3549 if (cmd->opcode == O_IP_DST_SET) /* set */
3550 cmd->opcode = O_IP_SRC_SET;
3551 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3552 cmd->opcode = O_IP_SRC_LOOKUP;
3553 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3554 cmd->opcode = O_IP_SRC_ME;
3555 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3556 cmd->opcode = O_IP_SRC;
3557 else /* addr/mask */
3558 cmd->opcode = O_IP_SRC_MASK;
3563 add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate)
3565 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate);
3566 if (cmd->opcode == O_IP_DST_SET) /* set */
3568 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
3570 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
3571 cmd->opcode = O_IP_DST_ME;
3572 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
3573 cmd->opcode = O_IP_DST;
3574 else /* addr/mask */
3575 cmd->opcode = O_IP_DST_MASK;
3579 static struct _s_x f_reserved_keywords[] = {
3582 { "diverted", TOK_OR },
3583 { "dst-port", TOK_OR },
3584 { "src-port", TOK_OR },
3585 { "established", TOK_OR },
3586 { "keep-state", TOK_OR },
3588 { "icmptypes", TOK_OR },
3596 { NULL, 0 } /* terminator */
3600 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
3603 if (match_token(f_reserved_keywords, av) != -1)
3606 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
3607 /* XXX todo: check that we have a protocol with ports */
3608 cmd->opcode = opcode;
3615 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3618 char *host, *ch, buf[INET6_ADDRSTRLEN];
3619 ipfw_insn *ret = NULL;
3622 /* Copy first address in set if needed */
3623 if ((ch = strpbrk(av, "/,")) != NULL) {
3625 strlcpy(buf, av, sizeof(buf));
3626 if (len < sizeof(buf))
3632 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3633 inet_pton(AF_INET6, host, &a) == 1)
3634 ret = add_srcip6(cmd, av, cblen, tstate);
3635 /* XXX: should check for IPv4, not !IPv6 */
3636 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3637 inet_pton(AF_INET6, host, &a) != 1))
3638 ret = add_srcip(cmd, av, cblen, tstate);
3639 if (ret == NULL && strcmp(av, "any") != 0)
3646 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate)
3649 char *host, *ch, buf[INET6_ADDRSTRLEN];
3650 ipfw_insn *ret = NULL;
3653 /* Copy first address in set if needed */
3654 if ((ch = strpbrk(av, "/,")) != NULL) {
3656 strlcpy(buf, av, sizeof(buf));
3657 if (len < sizeof(buf))
3663 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
3664 inet_pton(AF_INET6, host, &a) == 1)
3665 ret = add_dstip6(cmd, av, cblen, tstate);
3666 /* XXX: should check for IPv4, not !IPv6 */
3667 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
3668 inet_pton(AF_INET6, host, &a) != 1))
3669 ret = add_dstip(cmd, av, cblen, tstate);
3670 if (ret == NULL && strcmp(av, "any") != 0)
3677 * Parse arguments and assemble the microinstructions which make up a rule.
3678 * Rules are added into the 'rulebuf' and then copied in the correct order
3679 * into the actual rule.
3681 * The syntax for a rule starts with the action, followed by
3682 * optional action parameters, and the various match patterns.
3683 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
3684 * (generated if the rule includes a keep-state option), then the
3685 * various match patterns, log/altq actions, and the actual action.
3689 compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate)
3692 * rules are added into the 'rulebuf' and then copied in
3693 * the correct order into the actual rule.
3694 * Some things that need to go out of order (prob, action etc.)
3697 static uint32_t actbuf[255], cmdbuf[255];
3698 int rblen, ablen, cblen;
3700 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
3701 ipfw_insn *first_cmd; /* first match pattern */
3703 struct ip_fw_rule *rule;
3706 * various flags used to record that we entered some fields.
3708 ipfw_insn *have_state = NULL; /* check-state or keep-state */
3709 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
3714 int open_par = 0; /* open parenthesis ( */
3716 /* proto is here because it is used to fetch ports */
3717 u_char proto = IPPROTO_IP; /* default protocol */
3719 double match_prob = 1; /* match probability, default is always match */
3721 bzero(actbuf, sizeof(actbuf)); /* actions go here */
3722 bzero(cmdbuf, sizeof(cmdbuf));
3723 bzero(rbuf, *rbufsize);
3725 rule = (struct ip_fw_rule *)rbuf;
3726 cmd = (ipfw_insn *)cmdbuf;
3727 action = (ipfw_insn *)actbuf;
3729 rblen = *rbufsize / sizeof(uint32_t);
3730 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t);
3731 ablen = sizeof(actbuf) / sizeof(actbuf[0]);
3732 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
3733 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
3735 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; }
3736 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len)
3740 /* [rule N] -- Rule number optional */
3741 if (av[0] && isdigit(**av)) {
3742 rule->rulenum = atoi(*av);
3746 /* [set N] -- set number (0..RESVD_SET), optional */
3747 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
3748 int set = strtoul(av[1], NULL, 10);
3749 if (set < 0 || set > RESVD_SET)
3750 errx(EX_DATAERR, "illegal set %s", av[1]);
3756 /* [prob D] -- match probability, optional */
3757 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
3758 match_prob = strtod(av[1], NULL);
3760 if (match_prob <= 0 || match_prob > 1)
3761 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
3765 /* action -- mandatory */
3766 NEED1("missing action");
3767 i = match_token(rule_actions, *av);
3769 action->len = 1; /* default */
3772 case TOK_CHECKSTATE:
3773 have_state = action;
3774 action->opcode = O_CHECK_STATE;
3776 match_token(rule_options, *av) == TOK_COMMENT) {
3777 action->arg1 = pack_object(tstate,
3778 default_state_name, IPFW_TLV_STATE_NAME);
3781 if (*av[0] == ':') {
3782 if (strcmp(*av + 1, "any") == 0)
3784 else if (state_check_name(*av + 1) == 0)
3785 action->arg1 = pack_object(tstate, *av + 1,
3786 IPFW_TLV_STATE_NAME);
3788 errx(EX_DATAERR, "Invalid state name %s",
3793 errx(EX_DATAERR, "Invalid state name %s", *av);
3797 action->opcode = O_REJECT;
3798 action->arg1 = ICMP_REJECT_ABORT;
3802 action->opcode = O_UNREACH6;
3803 action->arg1 = ICMP6_UNREACH_ABORT;
3807 action->opcode = O_ACCEPT;
3811 action->opcode = O_DENY;
3816 action->opcode = O_REJECT;
3817 action->arg1 = ICMP_UNREACH_HOST;
3821 action->opcode = O_REJECT;
3822 action->arg1 = ICMP_REJECT_RST;
3826 action->opcode = O_UNREACH6;
3827 action->arg1 = ICMP6_UNREACH_RST;
3831 action->opcode = O_REJECT;
3832 NEED1("missing reject code");
3833 fill_reject_code(&action->arg1, *av);
3838 action->opcode = O_UNREACH6;
3839 NEED1("missing unreach code");
3840 fill_unreach6_code(&action->arg1, *av);
3845 action->opcode = O_COUNT;
3849 action->opcode = O_NAT;
3850 action->len = F_INSN_SIZE(ipfw_insn_nat);
3852 if (*av != NULL && _substrcmp(*av, "global") == 0) {
3853 action->arg1 = IP_FW_NAT44_GLOBAL;
3859 action->opcode = O_QUEUE;
3862 action->opcode = O_PIPE;
3865 action->opcode = O_SKIPTO;
3868 action->opcode = O_NETGRAPH;
3871 action->opcode = O_NGTEE;
3874 action->opcode = O_DIVERT;
3877 action->opcode = O_TEE;
3880 action->opcode = O_CALLRETURN;
3883 errx(EX_USAGE, "missing argument for %s", *(av - 1));
3884 if (isdigit(**av)) {
3885 action->arg1 = strtoul(*av, NULL, 10);
3886 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3887 errx(EX_DATAERR, "illegal argument for %s",
3889 } else if (_substrcmp(*av, "tablearg") == 0) {
3890 action->arg1 = IP_FW_TARG;
3891 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3894 s = getservbyname(av[0], "divert");
3896 action->arg1 = ntohs(s->s_port);
3898 errx(EX_DATAERR, "illegal divert/tee port");
3900 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3906 * Locate the address-port separator (':' or ',').
3907 * Could be one of the following:
3911 * IPv6 w:x:y::z,port
3912 * The ':' can only be used with hostname and IPv4 address.
3913 * XXX-BZ Should we also support [w:x:y::z]:port?
3915 struct sockaddr_storage result;
3916 struct addrinfo *res;
3919 u_short port_number;
3921 NEED1("missing forward address[:port]");
3924 * locate the address-port separator (':' or ',')
3926 s = strchr(*av, ',');
3928 /* Distinguish between IPv4:port and IPv6 cases. */
3929 s = strchr(*av, ':');
3930 if (s && strchr(s+1, ':'))
3931 s = NULL; /* no port */
3936 /* Terminate host portion and set s to start of port. */
3938 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3941 "illegal forwarding port ``%s''", s);
3942 port_number = (u_short)i;
3945 if (_substrcmp(*av, "tablearg") == 0) {
3947 ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3951 * Resolve the host name or address to a family and a
3952 * network representation of the address.
3954 if (getaddrinfo(*av, NULL, NULL, &res))
3955 errx(EX_DATAERR, NULL);
3956 /* Just use the first host in the answer. */
3957 family = res->ai_family;
3958 memcpy(&result, res->ai_addr, res->ai_addrlen);
3962 if (family == PF_INET) {
3963 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3965 action->opcode = O_FORWARD_IP;
3966 action->len = F_INSN_SIZE(ipfw_insn_sa);
3970 * In the kernel we assume AF_INET and use only
3971 * sin_port and sin_addr. Remember to set sin_len as
3972 * the routing code seems to use it too.
3974 p->sa.sin_len = sizeof(struct sockaddr_in);
3975 p->sa.sin_family = AF_INET;
3976 p->sa.sin_port = port_number;
3977 p->sa.sin_addr.s_addr =
3978 ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3979 } else if (family == PF_INET6) {
3980 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3982 action->opcode = O_FORWARD_IP6;
3983 action->len = F_INSN_SIZE(ipfw_insn_sa6);
3986 p->sa.sin6_len = sizeof(struct sockaddr_in6);
3987 p->sa.sin6_family = AF_INET6;
3988 p->sa.sin6_port = port_number;
3989 p->sa.sin6_flowinfo = 0;
3990 p->sa.sin6_scope_id =
3991 ((struct sockaddr_in6 *)&result)->sin6_scope_id;
3992 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3993 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3995 errx(EX_DATAERR, "Invalid address family in forward action");
4001 /* pretend it is a 'count' rule followed by the comment */
4002 action->opcode = O_COUNT;
4003 av--; /* go back... */
4009 size_t intsize = sizeof(int);
4011 action->opcode = O_SETFIB;
4012 NEED1("missing fib number");
4013 if (_substrcmp(*av, "tablearg") == 0) {
4014 action->arg1 = IP_FW_TARG;
4016 action->arg1 = strtoul(*av, NULL, 10);
4017 if (sysctlbyname("net.fibs", &numfibs, &intsize,
4019 errx(EX_DATAERR, "fibs not suported.\n");
4020 if (action->arg1 >= numfibs) /* Temporary */
4021 errx(EX_DATAERR, "fib too large.\n");
4022 /* Add high-order bit to fib to make room for tablearg*/
4023 action->arg1 |= 0x8000;
4033 action->opcode = O_SETDSCP;
4034 NEED1("missing DSCP code");
4035 if (_substrcmp(*av, "tablearg") == 0) {
4036 action->arg1 = IP_FW_TARG;
4038 if (isalpha(*av[0])) {
4039 if ((code = match_token(f_ipdscp, *av)) == -1)
4040 errx(EX_DATAERR, "Unknown DSCP code");
4041 action->arg1 = code;
4043 action->arg1 = strtoul(*av, NULL, 10);
4045 * Add high-order bit to DSCP to make room
4048 action->arg1 |= 0x8000;
4055 action->opcode = O_REASS;
4059 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
4062 case TOK_TCPSETMSS: {
4066 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION);
4068 errx(EX_DATAERR, "pack_object failed");
4069 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4070 NEED1("Missing MSS value");
4071 action = next_cmd(action, &ablen);
4074 mss = strtoul(*av, NULL, 10);
4075 if (mss == 0 || mss > UINT16_MAX)
4076 errx(EX_USAGE, "invalid MSS value %s", *av);
4077 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss);
4084 if (match_token(rule_eactions, *av) == -1)
4085 errx(EX_DATAERR, "invalid action %s\n", *av);
4087 * External actions support.
4088 * XXX: we support only syntax with instance name.
4089 * For known external actions (from rule_eactions list)
4090 * we can handle syntax directly. But with `eaction'
4091 * keyword we can use only `eaction <name> <instance>'
4097 NEED1("Missing eaction name");
4098 if (eaction_check_name(*av) != 0)
4099 errx(EX_DATAERR, "Invalid eaction name %s", *av);
4100 idx = pack_object(tstate, *av, IPFW_TLV_EACTION);
4102 errx(EX_DATAERR, "pack_object failed");
4103 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx);
4105 NEED1("Missing eaction instance name");
4106 action = next_cmd(action, &ablen);
4109 if (eaction_check_name(*av) != 0)
4110 errx(EX_DATAERR, "Invalid eaction instance name %s",
4113 * External action instance object has TLV type depended
4114 * from the external action name object index. Since we
4115 * currently don't know this index, use zero as TLV type.
4117 idx = pack_object(tstate, *av, 0);
4119 errx(EX_DATAERR, "pack_object failed");
4120 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx);
4124 action = next_cmd(action, &ablen);
4127 * [altq queuename] -- altq tag, optional
4128 * [log [logamount N]] -- log, optional
4130 * If they exist, it go first in the cmdbuf, but then it is
4131 * skipped in the copy section to the end of the buffer.
4133 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
4138 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
4143 "log cannot be specified more than once");
4144 have_log = (ipfw_insn *)c;
4145 cmd->len = F_INSN_SIZE(ipfw_insn_log);
4147 cmd->opcode = O_LOG;
4148 if (av[0] && _substrcmp(*av, "logamount") == 0) {
4150 NEED1("logamount requires argument");
4154 "logamount must be positive");
4158 len = sizeof(c->max_log);
4159 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
4160 &c->max_log, &len, NULL, 0) == -1) {
4165 errx(1, "sysctlbyname(\"%s\")",
4166 "net.inet.ip.fw.verbose_limit");
4175 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
4177 NEED1("missing altq queue name");
4180 "altq cannot be specified more than once");
4181 have_altq = (ipfw_insn *)a;
4182 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
4184 cmd->opcode = O_ALTQ;
4185 a->qid = altq_name_to_qid(*av);
4196 errx(EX_USAGE, "tag and untag cannot be "
4197 "specified more than once");
4198 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
4199 rule_action_params);
4201 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
4209 cmd = next_cmd(cmd, &cblen);
4212 if (have_state) { /* must be a check-state, we are done */
4214 match_token(rule_options, *av) == TOK_COMMENT) {
4215 /* check-state has a comment */
4217 fill_comment(cmd, av, cblen);
4218 cmd = next_cmd(cmd, &cblen);
4224 #define OR_START(target) \
4225 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
4227 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
4230 if ( (av[0])[1] == '\0') { \
4241 strcmp(*av, ")") == 0 || \
4242 strcmp(*av, "}") == 0)) { \
4247 errx(EX_USAGE, "missing \")\"\n"); \
4251 if (av[0] && _substrcmp(*av, "not") == 0) { \
4252 if (cmd->len & F_NOT) \
4253 errx(EX_USAGE, "double \"not\" not allowed\n"); \
4254 cmd->len |= F_NOT; \
4258 #define OR_BLOCK(target) \
4259 if (av[0] && _substrcmp(*av, "or") == 0) { \
4260 if (prev == NULL || open_par == 0) \
4261 errx(EX_DATAERR, "invalid OR block"); \
4262 prev->len |= F_OR; \
4272 * MAC addresses, optional.
4273 * If we have this, we skip the part "proto from src to dst"
4274 * and jump straight to the option parsing.
4277 NEED1("missing protocol");
4278 if (_substrcmp(*av, "MAC") == 0 ||
4279 _substrcmp(*av, "mac") == 0) {
4280 av++; /* the "MAC" keyword */
4281 add_mac(cmd, av); /* exits in case of errors */
4282 cmd = next_cmd(cmd);
4283 av += 2; /* dst-mac and src-mac */
4285 NEED1("missing mac type");
4286 if (add_mactype(cmd, av[0]))
4287 cmd = next_cmd(cmd);
4288 av++; /* any or mac-type */
4294 * protocol, mandatory
4296 OR_START(get_proto);
4298 NEED1("missing protocol");
4299 if (add_proto_compat(cmd, *av, &proto)) {
4301 if (F_LEN(cmd) != 0) {
4303 cmd = next_cmd(cmd, &cblen);
4305 } else if (first_cmd != cmd) {
4306 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
4309 OR_BLOCK(get_proto);
4314 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
4315 errx(EX_USAGE, "missing ``from''");
4319 * source IP, mandatory
4321 OR_START(source_ip);
4322 NOT_BLOCK; /* optional "not" */
4323 NEED1("missing source address");
4324 if (add_src(cmd, *av, proto, cblen, tstate)) {
4326 if (F_LEN(cmd) != 0) { /* ! any */
4328 cmd = next_cmd(cmd, &cblen);
4331 errx(EX_USAGE, "bad source address %s", *av);
4332 OR_BLOCK(source_ip);
4335 * source ports, optional
4337 NOT_BLOCK; /* optional "not" */
4338 if ( av[0] != NULL ) {
4339 if (_substrcmp(*av, "any") == 0 ||
4340 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4342 if (F_LEN(cmd) != 0)
4343 cmd = next_cmd(cmd, &cblen);
4350 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
4351 errx(EX_USAGE, "missing ``to''");
4355 * destination, mandatory
4358 NOT_BLOCK; /* optional "not" */
4359 NEED1("missing dst address");
4360 if (add_dst(cmd, *av, proto, cblen, tstate)) {
4362 if (F_LEN(cmd) != 0) { /* ! any */
4364 cmd = next_cmd(cmd, &cblen);
4367 errx( EX_USAGE, "bad destination address %s", *av);
4371 * dest. ports, optional
4373 NOT_BLOCK; /* optional "not" */
4375 if (_substrcmp(*av, "any") == 0 ||
4376 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4378 if (F_LEN(cmd) != 0)
4379 cmd = next_cmd(cmd, &cblen);
4385 while ( av[0] != NULL ) {
4387 ipfw_insn_u32 *cmd32; /* alias for cmd */
4390 cmd32 = (ipfw_insn_u32 *)cmd;
4392 if (*s == '!') { /* alternate syntax for NOT */
4393 if (cmd->len & F_NOT)
4394 errx(EX_USAGE, "double \"not\" not allowed\n");
4398 i = match_token(rule_options, s);
4402 if (cmd->len & F_NOT)
4403 errx(EX_USAGE, "double \"not\" not allowed\n");
4408 if (open_par == 0 || prev == NULL)
4409 errx(EX_USAGE, "invalid \"or\" block\n");
4413 case TOK_STARTBRACE:
4415 errx(EX_USAGE, "+nested \"(\" not allowed\n");
4421 errx(EX_USAGE, "+missing \")\"\n");
4427 fill_cmd(cmd, O_IN, 0, 0);
4431 cmd->len ^= F_NOT; /* toggle F_NOT */
4432 fill_cmd(cmd, O_IN, 0, 0);
4436 fill_cmd(cmd, O_DIVERTED, 0, 3);
4439 case TOK_DIVERTEDLOOPBACK:
4440 fill_cmd(cmd, O_DIVERTED, 0, 1);
4443 case TOK_DIVERTEDOUTPUT:
4444 fill_cmd(cmd, O_DIVERTED, 0, 2);
4448 fill_cmd(cmd, O_FRAG, 0, 0);
4452 fill_cmd(cmd, O_LAYER2, 0, 0);
4458 NEED1("recv, xmit, via require interface name"
4460 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate);
4462 if (F_LEN(cmd) == 0) /* not a valid address */
4465 cmd->opcode = O_XMIT;
4466 else if (i == TOK_RECV)
4467 cmd->opcode = O_RECV;
4468 else if (i == TOK_VIA)
4469 cmd->opcode = O_VIA;
4473 NEED1("icmptypes requires list of types");
4474 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
4478 case TOK_ICMP6TYPES:
4479 NEED1("icmptypes requires list of types");
4480 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
4485 NEED1("ipttl requires TTL");
4486 if (strpbrk(*av, "-,")) {
4487 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
4488 errx(EX_DATAERR, "invalid ipttl %s", *av);
4490 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
4495 NEED1("ipid requires id");
4496 if (strpbrk(*av, "-,")) {
4497 if (!add_ports(cmd, *av, 0, O_IPID, cblen))
4498 errx(EX_DATAERR, "invalid ipid %s", *av);
4500 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
4505 NEED1("iplen requires length");
4506 if (strpbrk(*av, "-,")) {
4507 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
4508 errx(EX_DATAERR, "invalid ip len %s", *av);
4510 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
4515 NEED1("ipver requires version");
4516 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
4520 case TOK_IPPRECEDENCE:
4521 NEED1("ipprecedence requires value");
4522 fill_cmd(cmd, O_IPPRECEDENCE, 0,
4523 (strtoul(*av, NULL, 0) & 7) << 5);
4528 NEED1("missing DSCP code");
4529 fill_dscp(cmd, *av, cblen);
4534 NEED1("missing argument for ipoptions");
4535 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av);
4540 NEED1("missing argument for iptos");
4541 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av);
4546 NEED1("uid requires argument");
4552 cmd->opcode = O_UID;
4553 uid = strtoul(*av, &end, 0);
4554 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
4556 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
4557 cmd32->d[0] = pwd->pw_uid;
4558 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4564 NEED1("gid requires argument");
4570 cmd->opcode = O_GID;
4571 gid = strtoul(*av, &end, 0);
4572 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
4574 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
4575 cmd32->d[0] = grp->gr_gid;
4576 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4582 NEED1("jail requires argument");
4587 cmd->opcode = O_JAIL;
4588 jid = (int)strtol(*av, &end, 0);
4589 if (jid < 0 || *end != '\0')
4590 errx(EX_DATAERR, "jail requires prison ID");
4591 cmd32->d[0] = (uint32_t)jid;
4592 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
4598 fill_cmd(cmd, O_ESTAB, 0, 0);
4602 fill_cmd(cmd, O_TCPFLAGS, 0,
4603 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
4606 case TOK_TCPDATALEN:
4607 NEED1("tcpdatalen requires length");
4608 if (strpbrk(*av, "-,")) {
4609 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
4610 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
4612 fill_cmd(cmd, O_TCPDATALEN, 0,
4613 strtoul(*av, NULL, 0));
4618 NEED1("missing argument for tcpoptions");
4619 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av);
4625 NEED1("tcpseq/tcpack requires argument");
4626 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
4627 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
4628 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
4633 NEED1("tcpwin requires length");
4634 if (strpbrk(*av, "-,")) {
4635 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
4636 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
4638 fill_cmd(cmd, O_TCPWIN, 0,
4639 strtoul(*av, NULL, 0));
4644 NEED1("missing argument for tcpflags");
4645 cmd->opcode = O_TCPFLAGS;
4646 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av);
4650 case TOK_KEEPSTATE: {
4654 errx(EX_USAGE, "keep-state cannot be part "
4657 errx(EX_USAGE, "only one of keep-state "
4658 "and limit is allowed");
4659 if (*av != NULL && *av[0] == ':') {
4660 if (state_check_name(*av + 1) != 0)
4662 "Invalid state name %s", *av);
4663 uidx = pack_object(tstate, *av + 1,
4664 IPFW_TLV_STATE_NAME);
4667 uidx = pack_object(tstate, default_state_name,
4668 IPFW_TLV_STATE_NAME);
4670 fill_cmd(cmd, O_KEEP_STATE, 0, uidx);
4675 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
4680 "limit cannot be part of an or block");
4682 errx(EX_USAGE, "only one of keep-state and "
4683 "limit is allowed");
4686 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
4688 cmd->opcode = O_LIMIT;
4689 c->limit_mask = c->conn_limit = 0;
4691 while ( av[0] != NULL ) {
4692 if ((val = match_token(limit_masks, *av)) <= 0)
4694 c->limit_mask |= val;
4698 if (c->limit_mask == 0)
4699 errx(EX_USAGE, "limit: missing limit mask");
4701 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
4702 TOK_LIMIT, rule_options);
4705 if (*av != NULL && *av[0] == ':') {
4706 if (state_check_name(*av + 1) != 0)
4708 "Invalid state name %s", *av);
4709 cmd->arg1 = pack_object(tstate, *av + 1,
4710 IPFW_TLV_STATE_NAME);
4713 cmd->arg1 = pack_object(tstate,
4714 default_state_name, IPFW_TLV_STATE_NAME);
4719 NEED1("missing protocol");
4720 if (add_proto(cmd, *av, &proto)) {
4723 errx(EX_DATAERR, "invalid protocol ``%s''",
4728 NEED1("missing source IP");
4729 if (add_srcip(cmd, *av, cblen, tstate)) {
4735 NEED1("missing destination IP");
4736 if (add_dstip(cmd, *av, cblen, tstate)) {
4742 NEED1("missing source IP6");
4743 if (add_srcip6(cmd, *av, cblen, tstate)) {
4749 NEED1("missing destination IP6");
4750 if (add_dstip6(cmd, *av, cblen, tstate)) {
4756 NEED1("missing source port");
4757 if (_substrcmp(*av, "any") == 0 ||
4758 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
4761 errx(EX_DATAERR, "invalid source port %s", *av);
4765 NEED1("missing destination port");
4766 if (_substrcmp(*av, "any") == 0 ||
4767 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
4770 errx(EX_DATAERR, "invalid destination port %s",
4775 if (add_mac(cmd, av, cblen))
4780 NEED1("missing mac type");
4781 if (!add_mactype(cmd, *av, cblen))
4782 errx(EX_DATAERR, "invalid mac type %s", *av);
4786 case TOK_VERREVPATH:
4787 fill_cmd(cmd, O_VERREVPATH, 0, 0);
4790 case TOK_VERSRCREACH:
4791 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
4795 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
4799 fill_cmd(cmd, O_IPSEC, 0, 0);
4803 fill_cmd(cmd, O_IP6, 0, 0);
4807 fill_cmd(cmd, O_IP4, 0, 0);
4811 fill_ext6hdr( cmd, *av );
4816 if (proto != IPPROTO_IPV6 )
4817 errx( EX_USAGE, "flow-id filter is active "
4818 "only for ipv6 protocol\n");
4819 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
4824 fill_comment(cmd, av, cblen);
4829 if (av[0] && strpbrk(*av, "-,")) {
4830 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
4831 errx(EX_DATAERR, "tagged: invalid tag"
4837 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
4838 TOK_TAGGED, rule_options);
4839 fill_cmd(cmd, O_TAGGED, 0, tag);
4845 NEED1("fib requires fib number");
4846 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
4850 fill_cmd(cmd, O_SOCKARG, 0, 0);
4854 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
4857 if (!av[0] || !av[1])
4858 errx(EX_USAGE, "format: lookup argument tablenum");
4859 cmd->opcode = O_IP_DST_LOOKUP;
4860 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
4861 i = match_token(rule_options, *av);
4862 for (j = 0; lookup_key[j] >= 0 ; j++) {
4863 if (i == lookup_key[j])
4866 if (lookup_key[j] <= 0)
4867 errx(EX_USAGE, "format: cannot lookup on %s", *av);
4868 __PAST_END(c->d, 1) = j; // i converted to option
4871 if ((j = pack_table(tstate, *av)) == 0)
4872 errx(EX_DATAERR, "Invalid table name: %s", *av);
4879 NEED1("missing table name");
4880 if (strncmp(*av, "table(", 6) != 0)
4882 "enclose table name into \"table()\"");
4883 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate);
4888 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
4890 if (F_LEN(cmd) > 0) { /* prepare to advance */
4892 cmd = next_cmd(cmd, &cblen);
4898 * Now copy stuff into the rule.
4899 * If we have a keep-state option, the first instruction
4900 * must be a PROBE_STATE (which is generated here).
4901 * If we have a LOG option, it was stored as the first command,
4902 * and now must be moved to the top of the action part.
4904 dst = (ipfw_insn *)rule->cmd;
4907 * First thing to write into the command stream is the match probability.
4909 if (match_prob != 1) { /* 1 means always match */
4910 dst->opcode = O_PROB;
4912 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
4917 * generate O_PROBE_STATE if necessary
4919 if (have_state && have_state->opcode != O_CHECK_STATE) {
4920 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1);
4921 dst = next_cmd(dst, &rblen);
4924 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
4925 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
4929 switch (src->opcode) {
4937 bcopy(src, dst, i * sizeof(uint32_t));
4943 * put back the have_state command as last opcode
4945 if (have_state && have_state->opcode != O_CHECK_STATE) {
4946 i = F_LEN(have_state);
4948 bcopy(have_state, dst, i * sizeof(uint32_t));
4952 * start action section
4954 rule->act_ofs = dst - rule->cmd;
4956 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
4958 i = F_LEN(have_log);
4960 bcopy(have_log, dst, i * sizeof(uint32_t));
4964 i = F_LEN(have_altq);
4966 bcopy(have_altq, dst, i * sizeof(uint32_t));
4970 i = F_LEN(have_tag);
4972 bcopy(have_tag, dst, i * sizeof(uint32_t));
4977 * copy all other actions
4979 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4982 bcopy(src, dst, i * sizeof(uint32_t));
4986 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4987 *rbufsize = (char *)dst - (char *)rule;
4991 compare_ntlv(const void *_a, const void *_b)
4993 ipfw_obj_ntlv *a, *b;
4995 a = (ipfw_obj_ntlv *)_a;
4996 b = (ipfw_obj_ntlv *)_b;
4998 if (a->set < b->set)
5000 else if (a->set > b->set)
5003 if (a->idx < b->idx)
5005 else if (a->idx > b->idx)
5008 if (a->head.type < b->head.type)
5010 else if (a->head.type > b->head.type)
5017 * Provide kernel with sorted list of referenced objects
5020 object_sort_ctlv(ipfw_obj_ctlv *ctlv)
5023 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
5031 compare_object_kntlv(const void *k, const void *v)
5033 ipfw_obj_ntlv *ntlv;
5034 struct object_kt key;
5036 key = *((struct object_kt *)k);
5037 ntlv = (ipfw_obj_ntlv *)v;
5039 if (key.uidx < ntlv->idx)
5041 else if (key.uidx > ntlv->idx)
5044 if (key.type < ntlv->head.type)
5046 else if (key.type > ntlv->head.type)
5053 * Finds object name in @ctlv by @idx and @type.
5054 * Uses the following facts:
5055 * 1) All TLVs are the same size
5056 * 2) Kernel implementation provides already sorted list.
5058 * Returns table name or NULL.
5061 object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type)
5063 ipfw_obj_ntlv *ntlv;
5064 struct object_kt key;
5069 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize,
5070 compare_object_kntlv);
5073 return (ntlv->name);
5079 table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
5082 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME));
5086 * Adds one or more rules to ipfw chain.
5091 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1)
5092 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3)
5097 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional)
5098 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ]
5101 * Rules in reply are modified to store their actual ruleset number.
5103 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending
5104 * according to their idx field and there has to be no duplicates.
5105 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending.
5106 * (*3) Each ip_fw structure needs to be aligned to u64 boundary.
5109 ipfw_add(char *av[])
5111 uint32_t rulebuf[1024];
5112 int rbufsize, default_off, tlen, rlen;
5115 struct ip_fw_rule *rule;
5117 ip_fw3_opheader *op3;
5118 ipfw_obj_ctlv *ctlv, *tstate;
5120 rbufsize = sizeof(rulebuf);
5121 memset(rulebuf, 0, rbufsize);
5122 memset(&ts, 0, sizeof(ts));
5124 /* Optimize case with no tables */
5125 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader);
5126 op3 = (ip_fw3_opheader *)rulebuf;
5127 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5128 rule = (struct ip_fw_rule *)(ctlv + 1);
5129 rbufsize -= default_off;
5131 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts);
5132 /* Align rule size to u64 boundary */
5133 rlen = roundup2(rbufsize, sizeof(uint64_t));
5138 if (ts.count != 0) {
5139 /* Some tables. We have to alloc more data */
5140 tlen = ts.count * sizeof(ipfw_obj_ntlv);
5141 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen;
5143 if ((tbuf = calloc(1, sz)) == NULL)
5144 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD");
5145 op3 = (ip_fw3_opheader *)tbuf;
5147 ctlv = (ipfw_obj_ctlv *)(op3 + 1);
5148 ctlv->head.type = IPFW_TLV_TBLNAME_LIST;
5149 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen;
5150 ctlv->count = ts.count;
5151 ctlv->objsize = sizeof(ipfw_obj_ntlv);
5152 memcpy(ctlv + 1, ts.idx, tlen);
5153 object_sort_ctlv(ctlv);
5156 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length);
5157 ctlv->head.type = IPFW_TLV_RULE_LIST;
5158 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5160 memcpy(ctlv + 1, rule, rbufsize);
5162 /* Simply add header */
5163 sz = rlen + default_off;
5164 memset(ctlv, 0, sizeof(*ctlv));
5165 ctlv->head.type = IPFW_TLV_RULE_LIST;
5166 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen;
5170 if (do_get3(IP_FW_XADD, op3, &sz) != 0)
5171 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD");
5174 struct format_opts sfo;
5176 memset(&sfo, 0, sizeof(sfo));
5177 sfo.tstate = tstate;
5178 sfo.set_mask = (uint32_t)(-1);
5179 bp_alloc(&bp, 4096);
5180 show_static_rule(&co, &sfo, &bp, rule, NULL);
5181 printf("%s", bp.buf);
5193 * clear the counters or the log counters.
5194 * optname has the following values:
5195 * 0 (zero both counters and logging)
5196 * 1 (zero logging only)
5199 ipfw_zero(int ac, char *av[], int optname)
5203 char const *name = optname ? "RESETLOG" : "ZERO";
5207 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO;
5211 /* clear all entries */
5212 memset(&rt, 0, sizeof(rt));
5213 rt.flags = IPFW_RCFLAG_ALL;
5214 if (do_range_cmd(optname, &rt) < 0)
5215 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name);
5217 printf("%s.\n", optname == IP_FW_XZERO ?
5218 "Accounting cleared":"Logging counts reset");
5225 if (isdigit(**av)) {
5226 arg = strtonum(*av, 0, 0xffff, &errstr);
5229 "invalid rule number %s\n", *av);
5230 memset(&rt, 0, sizeof(rt));
5231 rt.start_rule = arg;
5233 rt.flags |= IPFW_RCFLAG_RANGE;
5234 if (co.use_set != 0) {
5235 rt.set = co.use_set - 1;
5236 rt.flags |= IPFW_RCFLAG_SET;
5238 if (do_range_cmd(optname, &rt) != 0) {
5239 warn("rule %u: setsockopt(IP_FW_X%s)",
5241 failed = EX_UNAVAILABLE;
5242 } else if (rt.new_set == 0) {
5243 printf("Entry %d not found\n", arg);
5244 failed = EX_UNAVAILABLE;
5245 } else if (!co.do_quiet)
5246 printf("Entry %d %s.\n", arg,
5247 optname == IP_FW_XZERO ?
5248 "cleared" : "logging count reset");
5250 errx(EX_USAGE, "invalid rule number ``%s''", *av);
5254 if (failed != EX_OK)
5259 ipfw_flush(int force)
5263 if (!force && !co.do_quiet) { /* need to ask user */
5266 printf("Are you sure? [yn] ");
5269 c = toupper(getc(stdin));
5270 while (c != '\n' && getc(stdin) != '\n')
5272 return; /* and do not flush */
5273 } while (c != 'Y' && c != 'N');
5275 if (c == 'N') /* user said no */
5282 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
5283 memset(&rt, 0, sizeof(rt));
5284 if (co.use_set != 0) {
5285 rt.set = co.use_set - 1;
5286 rt.flags = IPFW_RCFLAG_SET;
5288 rt.flags = IPFW_RCFLAG_ALL;
5289 if (do_range_cmd(IP_FW_XDEL, &rt) != 0)
5290 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)");
5292 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
5295 static struct _s_x intcmds[] = {
5296 { "talist", TOK_TALIST },
5297 { "iflist", TOK_IFLIST },
5298 { "olist", TOK_OLIST },
5299 { "vlist", TOK_VLIST },
5303 static struct _s_x otypes[] = {
5304 { "EACTION", IPFW_TLV_EACTION },
5305 { "DYNSTATE", IPFW_TLV_STATE_NAME },
5310 lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type)
5316 for (i = 0; i < cnt; i++) {
5317 if (ntlv[i].head.type != IPFW_TLV_EACTION)
5319 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type)
5321 name = ntlv[i].name;
5328 ipfw_list_objects(int ac, char *av[])
5330 ipfw_obj_lheader req, *olh;
5331 ipfw_obj_ntlv *ntlv;
5336 memset(&req, 0, sizeof(req));
5338 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0)
5339 if (errno != ENOMEM)
5343 if ((olh = calloc(1, sz)) == NULL)
5347 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) {
5353 printf("Objects list:\n");
5355 printf("There are no objects\n");
5356 ntlv = (ipfw_obj_ntlv *)(olh + 1);
5357 for (i = 0; i < olh->count; i++) {
5358 name = match_value(otypes, ntlv->head.type);
5360 name = lookup_eaction_name(
5361 (ipfw_obj_ntlv *)(olh + 1), olh->count,
5364 printf(" kidx: %4d\ttype: %10d\tname: %s\n",
5365 ntlv->idx, ntlv->head.type, ntlv->name);
5367 printf(" kidx: %4d\ttype: %10s\tname: %s\n",
5368 ntlv->idx, name, ntlv->name);
5375 ipfw_internal_handler(int ac, char *av[])
5380 NEED1("internal cmd required");
5382 if ((tcmd = match_token(intcmds, *av)) == -1)
5383 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av);
5387 ipfw_list_tifaces();
5390 ipfw_list_ta(ac, av);
5393 ipfw_list_objects(ac, av);
5396 ipfw_list_values(ac, av);
5402 ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh)
5404 ipfw_obj_lheader req, *olh;
5407 memset(&req, 0, sizeof(req));
5410 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) {
5411 if (errno != ENOMEM)
5416 if ((olh = calloc(1, sz)) == NULL)
5420 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) {
5430 ifinfo_cmp(const void *a, const void *b)
5432 ipfw_iface_info *ia, *ib;
5434 ia = (ipfw_iface_info *)a;
5435 ib = (ipfw_iface_info *)b;
5437 return (stringnum_cmp(ia->ifname, ib->ifname));
5441 * Retrieves table list from kernel,
5442 * optionally sorts it and calls requested function for each table.
5443 * Returns 0 on success.
5448 ipfw_obj_lheader *olh;
5449 ipfw_iface_info *info;
5452 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0)
5453 err(EX_OSERR, "Unable to request ipfw tracked interface list");
5456 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp);
5458 info = (ipfw_iface_info *)(olh + 1);
5459 for (i = 0; i < olh->count; i++) {
5460 if (info->flags & IPFW_IFFLAG_RESOLVED)
5461 printf("%s ifindex: %d refcount: %u changes: %u\n",
5462 info->ifname, info->ifindex, info->refcnt,
5465 printf("%s ifindex: unresolved refcount: %u changes: %u\n",
5466 info->ifname, info->refcnt, info->gencnt);
5467 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize);