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>
41 #include <time.h> /* ctime */
42 #include <timeconv.h> /* _long_to_time */
45 #include <stddef.h> /* offsetof */
47 #include <net/ethernet.h>
48 #include <net/if.h> /* only IFNAMSIZ */
49 #include <netinet/in.h>
50 #include <netinet/in_systm.h> /* only n_short, n_long */
51 #include <netinet/ip.h>
52 #include <netinet/ip_icmp.h>
53 #include <netinet/ip_fw.h>
54 #include <netinet/tcp.h>
55 #include <arpa/inet.h>
57 struct cmdline_opts co; /* global options */
59 int resvd_set_number = RESVD_SET;
63 uint32_t ipfw_tables_max = 0; /* Number of tables supported by kernel */
66 #define s6_addr32 __u6_addr.__u6_addr32
69 #define CHECK_LENGTH(v, len) do { \
71 errx(EX_DATAERR, "Rule too long"); \
74 * Check if we have enough space in cmd buffer. Note that since
75 * first 8? u32 words are reserved by reserved header, full cmd
76 * buffer can't be used, so we need to protect from buffer overrun
77 * only. At the beginnig, cblen is less than actual buffer size by
78 * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need
79 * for checking small instructions fitting in given range.
80 * We also (ab)use the fact that ipfw_insn is always the first field
81 * for any custom instruction.
83 #define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
85 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
87 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
88 if (_substrcmp(*av, "tablearg") == 0) { \
89 arg = IP_FW_TABLEARG; \
97 _xval = strtol(*av, &end, 10); \
99 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
100 errx(EX_DATAERR, "%s: invalid argument: %s", \
101 match_value(s_x, tok), *av); \
103 if (errno == ERANGE || _xval < min || _xval > max) \
104 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
105 match_value(s_x, tok), min, max, *av); \
107 if (_xval == IP_FW_TABLEARG) \
108 errx(EX_DATAERR, "%s: illegal argument value: %s", \
109 match_value(s_x, tok), *av); \
115 PRINT_UINT_ARG(const char *str, uint32_t arg)
119 if (arg == IP_FW_TABLEARG)
125 static struct _s_x f_tcpflags[] = {
136 static struct _s_x f_tcpopts[] = {
137 { "mss", IP_FW_TCPOPT_MSS },
138 { "maxseg", IP_FW_TCPOPT_MSS },
139 { "window", IP_FW_TCPOPT_WINDOW },
140 { "sack", IP_FW_TCPOPT_SACK },
141 { "ts", IP_FW_TCPOPT_TS },
142 { "timestamp", IP_FW_TCPOPT_TS },
143 { "cc", IP_FW_TCPOPT_CC },
149 * IP options span the range 0 to 255 so we need to remap them
150 * (though in fact only the low 5 bits are significant).
152 static struct _s_x f_ipopts[] = {
153 { "ssrr", IP_FW_IPOPT_SSRR},
154 { "lsrr", IP_FW_IPOPT_LSRR},
155 { "rr", IP_FW_IPOPT_RR},
156 { "ts", IP_FW_IPOPT_TS},
161 static struct _s_x f_iptos[] = {
162 { "lowdelay", IPTOS_LOWDELAY},
163 { "throughput", IPTOS_THROUGHPUT},
164 { "reliability", IPTOS_RELIABILITY},
165 { "mincost", IPTOS_MINCOST},
166 { "congestion", IPTOS_ECN_CE},
167 { "ecntransport", IPTOS_ECN_ECT0},
168 { "ip tos option", 0},
172 static struct _s_x f_ipdscp[] = {
173 { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */
174 { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */
175 { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */
176 { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */
177 { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */
178 { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */
179 { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */
180 { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */
181 { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */
182 { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */
183 { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */
184 { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */
185 { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
186 { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */
187 { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */
188 { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */
189 { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */
190 { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */
191 { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */
192 { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */
193 { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */
194 { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */
198 static struct _s_x limit_masks[] = {
199 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
200 {"src-addr", DYN_SRC_ADDR},
201 {"src-port", DYN_SRC_PORT},
202 {"dst-addr", DYN_DST_ADDR},
203 {"dst-port", DYN_DST_PORT},
208 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
209 * This is only used in this code.
211 #define IPPROTO_ETHERTYPE 0x1000
212 static struct _s_x ether_types[] = {
214 * Note, we cannot use "-:&/" in the names because they are field
215 * separators in the type specifications. Also, we use s = NULL as
216 * end-delimiter, because a type of 0 can be legal.
229 { "pppoe_disc", 0x8863 },
230 { "pppoe_sess", 0x8864 },
231 { "ipx_8022", 0x00E0 },
232 { "ipx_8023", 0x0000 },
233 { "ipx_ii", 0x8137 },
234 { "ipx_snap", 0x8137 },
241 static struct _s_x rule_actions[] = {
242 { "accept", TOK_ACCEPT },
243 { "pass", TOK_ACCEPT },
244 { "allow", TOK_ACCEPT },
245 { "permit", TOK_ACCEPT },
246 { "count", TOK_COUNT },
247 { "pipe", TOK_PIPE },
248 { "queue", TOK_QUEUE },
249 { "divert", TOK_DIVERT },
251 { "netgraph", TOK_NETGRAPH },
252 { "ngtee", TOK_NGTEE },
253 { "fwd", TOK_FORWARD },
254 { "forward", TOK_FORWARD },
255 { "skipto", TOK_SKIPTO },
256 { "deny", TOK_DENY },
257 { "drop", TOK_DENY },
258 { "reject", TOK_REJECT },
259 { "reset6", TOK_RESET6 },
260 { "reset", TOK_RESET },
261 { "unreach6", TOK_UNREACH6 },
262 { "unreach", TOK_UNREACH },
263 { "check-state", TOK_CHECKSTATE },
264 { "//", TOK_COMMENT },
266 { "reass", TOK_REASS },
267 { "setfib", TOK_SETFIB },
268 { "setdscp", TOK_SETDSCP },
269 { "call", TOK_CALL },
270 { "return", TOK_RETURN },
271 { NULL, 0 } /* terminator */
274 static struct _s_x rule_action_params[] = {
275 { "altq", TOK_ALTQ },
278 { "untag", TOK_UNTAG },
279 { NULL, 0 } /* terminator */
283 * The 'lookup' instruction accepts one of the following arguments.
284 * -1 is a terminator for the list.
285 * Arguments are passed as v[1] in O_DST_LOOKUP options.
287 static int lookup_key[] = {
288 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
289 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
291 static struct _s_x rule_options[] = {
292 { "tagged", TOK_TAGGED },
295 { "jail", TOK_JAIL },
297 { "limit", TOK_LIMIT },
298 { "keep-state", TOK_KEEPSTATE },
299 { "bridged", TOK_LAYER2 },
300 { "layer2", TOK_LAYER2 },
302 { "diverted", TOK_DIVERTED },
303 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
304 { "diverted-output", TOK_DIVERTEDOUTPUT },
305 { "xmit", TOK_XMIT },
306 { "recv", TOK_RECV },
308 { "fragment", TOK_FRAG },
309 { "frag", TOK_FRAG },
311 { "ipoptions", TOK_IPOPTS },
312 { "ipopts", TOK_IPOPTS },
313 { "iplen", TOK_IPLEN },
314 { "ipid", TOK_IPID },
315 { "ipprecedence", TOK_IPPRECEDENCE },
316 { "dscp", TOK_DSCP },
317 { "iptos", TOK_IPTOS },
318 { "ipttl", TOK_IPTTL },
319 { "ipversion", TOK_IPVER },
320 { "ipver", TOK_IPVER },
321 { "estab", TOK_ESTAB },
322 { "established", TOK_ESTAB },
323 { "setup", TOK_SETUP },
324 { "sockarg", TOK_SOCKARG },
325 { "tcpdatalen", TOK_TCPDATALEN },
326 { "tcpflags", TOK_TCPFLAGS },
327 { "tcpflgs", TOK_TCPFLAGS },
328 { "tcpoptions", TOK_TCPOPTS },
329 { "tcpopts", TOK_TCPOPTS },
330 { "tcpseq", TOK_TCPSEQ },
331 { "tcpack", TOK_TCPACK },
332 { "tcpwin", TOK_TCPWIN },
333 { "icmptype", TOK_ICMPTYPES },
334 { "icmptypes", TOK_ICMPTYPES },
335 { "dst-ip", TOK_DSTIP },
336 { "src-ip", TOK_SRCIP },
337 { "dst-port", TOK_DSTPORT },
338 { "src-port", TOK_SRCPORT },
339 { "proto", TOK_PROTO },
342 { "mac-type", TOK_MACTYPE },
343 { "verrevpath", TOK_VERREVPATH },
344 { "versrcreach", TOK_VERSRCREACH },
345 { "antispoof", TOK_ANTISPOOF },
346 { "ipsec", TOK_IPSEC },
347 { "icmp6type", TOK_ICMP6TYPES },
348 { "icmp6types", TOK_ICMP6TYPES },
349 { "ext6hdr", TOK_EXT6HDR},
350 { "flow-id", TOK_FLOWID},
355 { "dst-ipv6", TOK_DSTIP6},
356 { "dst-ip6", TOK_DSTIP6},
357 { "src-ipv6", TOK_SRCIP6},
358 { "src-ip6", TOK_SRCIP6},
359 { "lookup", TOK_LOOKUP},
360 { "//", TOK_COMMENT },
362 { "not", TOK_NOT }, /* pseudo option */
363 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
364 { "or", TOK_OR }, /* pseudo option */
365 { "|", /* escape */ TOK_OR }, /* pseudo option */
366 { "{", TOK_STARTBRACE }, /* pseudo option */
367 { "(", TOK_STARTBRACE }, /* pseudo option */
368 { "}", TOK_ENDBRACE }, /* pseudo option */
369 { ")", TOK_ENDBRACE }, /* pseudo option */
370 { NULL, 0 } /* terminator */
374 * Helper routine to print a possibly unaligned uint64_t on
375 * various platform. If width > 0, print the value with
376 * the desired width, followed by a space;
377 * otherwise, return the required width.
380 pr_u64(uint64_t *pd, int width)
383 #define U64_FMT "I64"
385 #define U64_FMT "llu"
388 unsigned long long d;
390 bcopy (pd, &u, sizeof(u));
393 printf("%*" U64_FMT " ", width, d) :
394 snprintf(NULL, 0, "%" U64_FMT, d) ;
399 safe_calloc(size_t number, size_t size)
401 void *ret = calloc(number, size);
404 err(EX_OSERR, "calloc");
409 safe_realloc(void *ptr, size_t size)
411 void *ret = realloc(ptr, size);
414 err(EX_OSERR, "realloc");
419 * conditionally runs the command.
420 * Selected options or negative -> getsockopt
423 do_cmd(int optname, void *optval, uintptr_t optlen)
430 if (ipfw_socket == -1)
431 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
433 err(EX_UNAVAILABLE, "socket");
435 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
436 optname == IP_FW_ADD || optname == IP_FW3 ||
437 optname == IP_FW_NAT_GET_CONFIG ||
439 optname == IP_FW_NAT_GET_LOG) {
442 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
443 (socklen_t *)optlen);
445 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
451 * do_setcmd3 - pass ipfw control cmd to kernel
452 * @optname: option name
453 * @optval: pointer to option data
454 * @optlen: option length
456 * Function encapsulates option value in IP_FW3 socket option
457 * and calls setsockopt().
458 * Function returns 0 on success or -1 otherwise.
461 do_setcmd3(int optname, void *optval, socklen_t optlen)
464 ip_fw3_opheader *op3;
469 if (ipfw_socket == -1)
470 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
472 err(EX_UNAVAILABLE, "socket");
474 len = sizeof(ip_fw3_opheader) + optlen;
476 /* Zero reserved fields */
477 memset(op3, 0, sizeof(ip_fw3_opheader));
478 memcpy(op3 + 1, optval, optlen);
479 op3->opcode = optname;
481 return setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, len);
485 * match_token takes a table and a string, returns the value associated
486 * with the string (-1 in case of failure).
489 match_token(struct _s_x *table, char *string)
492 uint i = strlen(string);
494 for (pt = table ; i && pt->s != NULL ; pt++)
495 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
501 * match_value takes a table and a value, returns the string associated
502 * with the value (NULL in case of failure).
505 match_value(struct _s_x *p, int value)
507 for (; p->s != NULL; p++)
514 * _substrcmp takes two strings and returns 1 if they do not match,
515 * and 0 if they match exactly or the first string is a sub-string
516 * of the second. A warning is printed to stderr in the case that the
517 * first string is a sub-string of the second.
519 * This function will be removed in the future through the usual
520 * deprecation process.
523 _substrcmp(const char *str1, const char* str2)
526 if (strncmp(str1, str2, strlen(str1)) != 0)
529 if (strlen(str1) != strlen(str2))
530 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
536 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
537 * and 0 if they match exactly or the second string is a sub-string
538 * of the first. A warning is printed to stderr in the case that the
539 * first string does not match the third.
541 * This function exists to warn about the bizzare construction
542 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
543 * for "bytes". The problem is that in addition to accepting "by",
544 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
545 * other string beginning with "by".
547 * This function will be removed in the future through the usual
548 * deprecation process.
551 _substrcmp2(const char *str1, const char* str2, const char* str3)
554 if (strncmp(str1, str2, strlen(str2)) != 0)
557 if (strcmp(str1, str3) != 0)
558 warnx("DEPRECATED: '%s' matched '%s'",
564 * prints one port, symbolic or numeric
567 print_port(int proto, uint16_t port)
570 if (proto == IPPROTO_ETHERTYPE) {
573 if (co.do_resolv && (s = match_value(ether_types, port)) )
576 printf("0x%04x", port);
578 struct servent *se = NULL;
580 struct protoent *pe = getprotobynumber(proto);
582 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
585 printf("%s", se->s_name);
591 static struct _s_x _port_name[] = {
592 {"dst-port", O_IP_DSTPORT},
593 {"src-port", O_IP_SRCPORT},
597 {"mac-type", O_MAC_TYPE},
598 {"tcpdatalen", O_TCPDATALEN},
599 {"tcpwin", O_TCPWIN},
600 {"tagged", O_TAGGED},
605 * Print the values in a list 16-bit items of the types above.
606 * XXX todo: add support for mask.
609 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
611 uint16_t *p = cmd->ports;
616 sep = match_value(_port_name, opcode);
622 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
624 print_port(proto, p[0]);
627 print_port(proto, p[1]);
634 * Like strtol, but also translates service names into port numbers
635 * for some protocols.
637 * proto == -1 disables the protocol check;
638 * proto == IPPROTO_ETHERTYPE looks up an internal table
639 * proto == <some value in /etc/protocols> matches the values there.
640 * Returns *end == s in case the parameter is not found.
643 strtoport(char *s, char **end, int base, int proto)
649 *end = s; /* default - not found */
651 return 0; /* not found */
654 return strtol(s, end, base);
657 * find separator. '\\' escapes the next char.
659 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
660 if (*s1 == '\\' && s1[1] != '\0')
663 buf = safe_calloc(s1 - s + 1, 1);
666 * copy into a buffer skipping backslashes
668 for (p = s, i = 0; p != s1 ; p++)
673 if (proto == IPPROTO_ETHERTYPE) {
674 i = match_token(ether_types, buf);
676 if (i != -1) { /* found */
681 struct protoent *pe = NULL;
685 pe = getprotobynumber(proto);
687 se = getservbyname(buf, pe ? pe->p_name : NULL);
691 return ntohs(se->s_port);
694 return 0; /* not found */
698 * Fill the body of the command with the list of port ranges.
701 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen)
703 uint16_t a, b, *p = cmd->ports;
708 a = strtoport(av, &s, 0, proto);
709 if (s == av) /* empty or invalid argument */
712 CHECK_LENGTH(cblen, i + 2);
715 case '-': /* a range */
717 b = strtoport(av, &s, 0, proto);
718 /* Reject expressions like '1-abc' or '1-2-3'. */
719 if (s == av || (*s != ',' && *s != '\0'))
724 case ',': /* comma separated list */
729 warnx("port list: invalid separator <%c> in <%s>",
739 if (i + 1 > F_LEN_MASK)
740 errx(EX_DATAERR, "too many ports/ranges\n");
741 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
747 * Fill the body of the command with the list of DiffServ codepoints.
750 fill_dscp(ipfw_insn *cmd, char *av, int cblen)
752 uint32_t *low, *high;
756 cmd->opcode = O_DSCP;
757 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1;
761 low = (uint32_t *)(cmd + 1);
774 if ((code = match_token(f_ipdscp, s)) == -1)
775 errx(EX_DATAERR, "Unknown DSCP code");
777 code = strtoul(s, NULL, 10);
778 if (code < 0 || code > 63)
779 errx(EX_DATAERR, "Invalid DSCP value");
783 *high |= 1 << (code - 32);
791 static struct _s_x icmpcodes[] = {
792 { "net", ICMP_UNREACH_NET },
793 { "host", ICMP_UNREACH_HOST },
794 { "protocol", ICMP_UNREACH_PROTOCOL },
795 { "port", ICMP_UNREACH_PORT },
796 { "needfrag", ICMP_UNREACH_NEEDFRAG },
797 { "srcfail", ICMP_UNREACH_SRCFAIL },
798 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
799 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
800 { "isolated", ICMP_UNREACH_ISOLATED },
801 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
802 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
803 { "tosnet", ICMP_UNREACH_TOSNET },
804 { "toshost", ICMP_UNREACH_TOSHOST },
805 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
806 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
807 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
812 fill_reject_code(u_short *codep, char *str)
817 val = strtoul(str, &s, 0);
818 if (s == str || *s != '\0' || val >= 0x100)
819 val = match_token(icmpcodes, str);
821 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
827 print_reject_code(uint16_t code)
829 char const *s = match_value(icmpcodes, code);
832 printf("unreach %s", s);
834 printf("unreach %u", code);
838 * Returns the number of bits set (from left) in a contiguous bitmask,
839 * or -1 if the mask is not contiguous.
840 * XXX this needs a proper fix.
841 * This effectively works on masks in big-endian (network) format.
842 * when compiled on little endian architectures.
844 * First bit is bit 7 of the first byte -- note, for MAC addresses,
845 * the first bit on the wire is bit 0 of the first byte.
846 * len is the max length in bits.
849 contigmask(uint8_t *p, int len)
853 for (i=0; i<len ; i++)
854 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
856 for (n=i+1; n < len; n++)
857 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
858 return -1; /* mask not contiguous */
863 * print flags set/clear in the two bitmasks passed as parameters.
864 * There is a specialized check for f_tcpflags.
867 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
869 char const *comma = "";
871 uint8_t set = cmd->arg1 & 0xff;
872 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
874 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
879 printf(" %s ", name);
880 for (i=0; list[i].x != 0; i++) {
881 if (set & list[i].x) {
883 printf("%s%s", comma, list[i].s);
886 if (clear & list[i].x) {
888 printf("%s!%s", comma, list[i].s);
895 * Print the ip address contained in a command.
898 print_ip(ipfw_insn_ip *cmd, char const *s)
900 struct hostent *he = NULL;
901 uint32_t len = F_LEN((ipfw_insn *)cmd);
902 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
904 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
906 const char *arg = "<invalid>";
908 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
909 arg = match_value(rule_options, lookup_key[d]);
910 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
914 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
916 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
920 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
921 cmd->o.opcode == O_IP_DST_LOOKUP) {
922 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
923 if (len == F_INSN_SIZE(ipfw_insn_u32))
928 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
929 uint32_t x, *map = (uint32_t *)&(cmd->mask);
935 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
936 printf("%s/%d", inet_ntoa(cmd->addr),
937 contigmask((uint8_t *)&x, 32));
938 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
939 x &= 0xff; /* base */
941 * Print bits and ranges.
942 * Locate first bit set (i), then locate first bit unset (j).
943 * If we have 3+ consecutive bits set, then print them as a
944 * range, otherwise only print the initial bit and rescan.
946 for (i=0; i < cmd->o.arg1; i++)
947 if (map[i/32] & (1<<(i & 31))) {
948 for (j=i+1; j < cmd->o.arg1; j++)
949 if (!(map[ j/32] & (1<<(j & 31))))
951 printf("%c%d", comma, i+x);
952 if (j>i+2) { /* range has at least 3 elements */
953 printf("-%d", j-1+x);
962 * len == 2 indicates a single IP, whereas lists of 1 or more
963 * addr/mask pairs have len = (2n+1). We convert len to n so we
964 * use that to count the number of entries.
966 for (len = len / 2; len > 0; len--, a += 2) {
967 int mb = /* mask length */
968 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
969 32 : contigmask((uint8_t *)&(a[1]), 32);
970 if (mb == 32 && co.do_resolv)
971 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
972 if (he != NULL) /* resolved to name */
973 printf("%s", he->h_name);
974 else if (mb == 0) /* any */
976 else { /* numeric IP followed by some kind of mask */
977 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
979 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
989 * prints a MAC address/mask pair
992 print_mac(uint8_t *addr, uint8_t *mask)
994 int l = contigmask(mask, 48);
999 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
1000 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
1002 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
1003 mask[0], mask[1], mask[2],
1004 mask[3], mask[4], mask[5]);
1011 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
1020 type = strtoul(av, &av, 0);
1022 if (*av != ',' && *av != '\0')
1023 errx(EX_DATAERR, "invalid ICMP type");
1026 errx(EX_DATAERR, "ICMP type out of range");
1028 cmd->d[0] |= 1 << type;
1030 cmd->o.opcode = O_ICMPTYPE;
1031 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1035 print_icmptypes(ipfw_insn_u32 *cmd)
1040 printf(" icmptypes");
1041 for (i = 0; i < 32; i++) {
1042 if ( (cmd->d[0] & (1 << (i))) == 0)
1044 printf("%c%d", sep, i);
1050 print_dscp(ipfw_insn_u32 *cmd)
1062 if (*v & (1 << i)) {
1063 if ((code = match_value(f_ipdscp, i)) != NULL)
1064 printf("%c%s", sep, code);
1066 printf("%c%d", sep, i);
1070 if ((++i % 32) == 0)
1076 * show_ipfw() prints the body of an ipfw rule.
1077 * Because the standard rule has at least proto src_ip dst_ip, we use
1078 * a helper function to produce these entries if not provided explicitly.
1079 * The first argument is the list of fields we have, the second is
1080 * the list of fields we want to be printed.
1082 * Special cases if we have provided a MAC header:
1083 * + if the rule does not contain IP addresses/ports, do not print them;
1084 * + if the rule does not contain an IP proto, print "all" instead of "ip";
1086 * Once we have 'have_options', IP header fields are printed as options.
1088 #define HAVE_PROTO 0x0001
1089 #define HAVE_SRCIP 0x0002
1090 #define HAVE_DSTIP 0x0004
1091 #define HAVE_PROTO4 0x0008
1092 #define HAVE_PROTO6 0x0010
1093 #define HAVE_IP 0x0100
1094 #define HAVE_OPTIONS 0x8000
1097 show_prerequisites(int *flags, int want, int cmd __unused)
1099 if (co.comment_only)
1101 if ( (*flags & HAVE_IP) == HAVE_IP)
1102 *flags |= HAVE_OPTIONS;
1104 if ( !(*flags & HAVE_OPTIONS)) {
1105 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
1106 if ( (*flags & HAVE_PROTO4))
1108 else if ( (*flags & HAVE_PROTO6))
1113 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1114 printf(" from any");
1115 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1122 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1124 static int twidth = 0;
1126 ipfw_insn *cmd, *tagptr = NULL;
1127 const char *comment = NULL; /* ptr to comment if we have one */
1128 int proto = 0; /* default */
1129 int flags = 0; /* prerequisites */
1130 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1131 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1132 int or_block = 0; /* we are in an or block */
1133 uint32_t set_disable;
1135 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1137 if (set_disable & (1 << rule->set)) { /* disabled */
1141 printf("# DISABLED ");
1143 printf("%05u ", rule->rulenum);
1145 if (pcwidth > 0 || bcwidth > 0) {
1146 pr_u64(&rule->pcnt, pcwidth);
1147 pr_u64(&rule->bcnt, bcwidth);
1150 if (co.do_time == 2)
1151 printf("%10u ", rule->timestamp);
1152 else if (co.do_time == 1) {
1154 time_t t = (time_t)0;
1157 strcpy(timestr, ctime(&t));
1158 *strchr(timestr, '\n') = '\0';
1159 twidth = strlen(timestr);
1161 if (rule->timestamp) {
1162 t = _long_to_time(rule->timestamp);
1164 strcpy(timestr, ctime(&t));
1165 *strchr(timestr, '\n') = '\0';
1166 printf("%s ", timestr);
1168 printf("%*s", twidth, " ");
1173 printf("set %d ", rule->set);
1176 * print the optional "match probability"
1178 if (rule->cmd_len > 0) {
1180 if (cmd->opcode == O_PROB) {
1181 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1182 double d = 1.0 * p->d[0];
1184 d = (d / 0x7fffffff);
1185 printf("prob %f ", d);
1190 * first print actions
1192 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1193 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1194 switch(cmd->opcode) {
1196 printf("check-state");
1197 /* avoid printing anything else */
1198 flags = HAVE_PROTO | HAVE_SRCIP |
1199 HAVE_DSTIP | HAVE_IP;
1215 if (cmd->arg1 == ICMP_REJECT_RST)
1217 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1220 print_reject_code(cmd->arg1);
1224 if (cmd->arg1 == ICMP6_UNREACH_RST)
1227 print_unreach6_code(cmd->arg1);
1231 PRINT_UINT_ARG("skipto ", cmd->arg1);
1235 PRINT_UINT_ARG("pipe ", cmd->arg1);
1239 PRINT_UINT_ARG("queue ", cmd->arg1);
1243 PRINT_UINT_ARG("divert ", cmd->arg1);
1247 PRINT_UINT_ARG("tee ", cmd->arg1);
1251 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1255 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1260 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1262 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1263 printf("fwd tablearg");
1265 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1268 printf(",%d", s->sa.sin_port);
1274 char buf[4 + INET6_ADDRSTRLEN + 1];
1275 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1277 printf("fwd %s", inet_ntop(AF_INET6, &s->sa.sin6_addr,
1279 if (s->sa.sin6_port)
1280 printf(",%d", s->sa.sin6_port);
1284 case O_LOG: /* O_LOG is printed last */
1285 logptr = (ipfw_insn_log *)cmd;
1288 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1289 altqptr = (ipfw_insn_altq *)cmd;
1298 PRINT_UINT_ARG("nat ", cmd->arg1);
1300 printf("nat global");
1304 PRINT_UINT_ARG("setfib ", cmd->arg1);
1311 if ((code = match_value(f_ipdscp, cmd->arg1)) != NULL)
1312 printf("setdscp %s", code);
1314 PRINT_UINT_ARG("setdscp ", cmd->arg1);
1323 if (cmd->len & F_NOT)
1326 PRINT_UINT_ARG("call ", cmd->arg1);
1330 printf("** unrecognized action %d len %d ",
1331 cmd->opcode, cmd->len);
1335 if (logptr->max_log > 0)
1336 printf(" log logamount %d", logptr->max_log);
1342 print_altq_cmd(altqptr);
1346 if (tagptr->len & F_NOT)
1347 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1349 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1353 * then print the body.
1355 for (l = rule->act_ofs, cmd = rule->cmd ;
1356 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1357 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1359 if (cmd->opcode == O_IP4) {
1360 flags |= HAVE_PROTO4;
1362 } else if (cmd->opcode == O_IP6) {
1363 flags |= HAVE_PROTO6;
1367 if (rule->_pad & 1) { /* empty rules before options */
1368 if (!co.do_compact) {
1369 show_prerequisites(&flags, HAVE_PROTO, 0);
1370 printf(" from any to any");
1372 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1373 HAVE_SRCIP | HAVE_DSTIP;
1376 if (co.comment_only)
1379 for (l = rule->act_ofs, cmd = rule->cmd ;
1380 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1382 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1384 if (co.comment_only) {
1385 if (cmd->opcode != O_NOP)
1387 printf(" // %s\n", (char *)(cmd + 1));
1391 show_prerequisites(&flags, 0, cmd->opcode);
1393 switch(cmd->opcode) {
1395 break; /* done already */
1398 break; /* no need to print anything here */
1401 case O_IP_SRC_LOOKUP:
1405 show_prerequisites(&flags, HAVE_PROTO, 0);
1406 if (!(flags & HAVE_SRCIP))
1408 if ((cmd->len & F_OR) && !or_block)
1410 print_ip((ipfw_insn_ip *)cmd,
1411 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1412 flags |= HAVE_SRCIP;
1416 case O_IP_DST_LOOKUP:
1420 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1421 if (!(flags & HAVE_DSTIP))
1423 if ((cmd->len & F_OR) && !or_block)
1425 print_ip((ipfw_insn_ip *)cmd,
1426 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1427 flags |= HAVE_DSTIP;
1431 case O_IP6_SRC_MASK:
1433 show_prerequisites(&flags, HAVE_PROTO, 0);
1434 if (!(flags & HAVE_SRCIP))
1436 if ((cmd->len & F_OR) && !or_block)
1438 print_ip6((ipfw_insn_ip6 *)cmd,
1439 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1440 flags |= HAVE_SRCIP | HAVE_PROTO;
1444 case O_IP6_DST_MASK:
1446 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1447 if (!(flags & HAVE_DSTIP))
1449 if ((cmd->len & F_OR) && !or_block)
1451 print_ip6((ipfw_insn_ip6 *)cmd,
1452 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1453 flags |= HAVE_DSTIP;
1457 print_flow6id( (ipfw_insn_u32 *) cmd );
1458 flags |= HAVE_OPTIONS;
1462 show_prerequisites(&flags,
1463 HAVE_PROTO | HAVE_SRCIP |
1464 HAVE_DSTIP | HAVE_IP, 0);
1466 if (flags & HAVE_DSTIP)
1468 show_prerequisites(&flags,
1469 HAVE_PROTO | HAVE_SRCIP, 0);
1470 if ((cmd->len & F_OR) && !or_block)
1472 if (cmd->len & F_NOT)
1474 print_newports((ipfw_insn_u16 *)cmd, proto,
1475 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1479 struct protoent *pe = NULL;
1481 if ((cmd->len & F_OR) && !or_block)
1483 if (cmd->len & F_NOT)
1486 pe = getprotobynumber(cmd->arg1);
1487 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1488 !(flags & HAVE_PROTO))
1489 show_prerequisites(&flags,
1490 HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1491 HAVE_DSTIP | HAVE_OPTIONS, 0);
1492 if (flags & HAVE_OPTIONS)
1495 printf(" %s", pe->p_name);
1497 printf(" %u", cmd->arg1);
1499 flags |= HAVE_PROTO;
1502 default: /*options ... */
1503 if (!(cmd->len & (F_OR|F_NOT)))
1504 if (((cmd->opcode == O_IP6) &&
1505 (flags & HAVE_PROTO6)) ||
1506 ((cmd->opcode == O_IP4) &&
1507 (flags & HAVE_PROTO4)))
1509 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP |
1510 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1511 if ((cmd->len & F_OR) && !or_block)
1513 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1515 switch(cmd->opcode) {
1517 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1520 print_mac(m->addr, m->mask);
1521 print_mac(m->addr + 6, m->mask + 6);
1526 print_newports((ipfw_insn_u16 *)cmd,
1527 IPPROTO_ETHERTYPE, cmd->opcode);
1536 printf(" fib %u", cmd->arg1 );
1543 printf(cmd->len & F_NOT ? " out" : " in");
1547 switch (cmd->arg1) {
1549 printf(" diverted");
1552 printf(" diverted-loopback");
1555 printf(" diverted-output");
1558 printf(" diverted-?<%u>", cmd->arg1);
1571 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1573 if (cmd->opcode == O_XMIT)
1575 else if (cmd->opcode == O_RECV)
1577 else /* if (cmd->opcode == O_VIA) */
1579 if (cmdif->name[0] == '\0')
1581 inet_ntoa(cmdif->p.ip));
1582 else if (cmdif->name[0] == '\1') /* interface table */
1583 printf(" %s table(%d)", s, cmdif->p.glob);
1585 printf(" %s %s", s, cmdif->name);
1590 if (F_LEN(cmd) == 1)
1591 printf(" ipid %u", cmd->arg1 );
1593 print_newports((ipfw_insn_u16 *)cmd, 0,
1598 if (F_LEN(cmd) == 1)
1599 printf(" ipttl %u", cmd->arg1 );
1601 print_newports((ipfw_insn_u16 *)cmd, 0,
1606 printf(" ipver %u", cmd->arg1 );
1609 case O_IPPRECEDENCE:
1610 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1614 print_dscp((ipfw_insn_u32 *)cmd);
1618 if (F_LEN(cmd) == 1)
1619 printf(" iplen %u", cmd->arg1 );
1621 print_newports((ipfw_insn_u16 *)cmd, 0,
1626 print_flags("ipoptions", cmd, f_ipopts);
1630 print_flags("iptos", cmd, f_iptos);
1634 print_icmptypes((ipfw_insn_u32 *)cmd);
1638 printf(" established");
1642 if (F_LEN(cmd) == 1)
1643 printf(" tcpdatalen %u", cmd->arg1 );
1645 print_newports((ipfw_insn_u16 *)cmd, 0,
1650 print_flags("tcpflags", cmd, f_tcpflags);
1654 print_flags("tcpoptions", cmd, f_tcpopts);
1658 if (F_LEN(cmd) == 1)
1659 printf(" tcpwin %u", cmd->arg1);
1661 print_newports((ipfw_insn_u16 *)cmd, 0,
1666 printf(" tcpack %d", ntohl(cmd32->d[0]));
1670 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1675 struct passwd *pwd = getpwuid(cmd32->d[0]);
1678 printf(" uid %s", pwd->pw_name);
1680 printf(" uid %u", cmd32->d[0]);
1686 struct group *grp = getgrgid(cmd32->d[0]);
1689 printf(" gid %s", grp->gr_name);
1691 printf(" gid %u", cmd32->d[0]);
1696 printf(" jail %d", cmd32->d[0]);
1700 printf(" verrevpath");
1704 printf(" versrcreach");
1708 printf(" antispoof");
1716 comment = (char *)(cmd + 1);
1720 printf(" keep-state");
1724 struct _s_x *p = limit_masks;
1725 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1726 uint8_t x = c->limit_mask;
1727 char const *comma = " ";
1730 for (; p->x != 0 ; p++)
1731 if ((x & p->x) == p->x) {
1733 printf("%s%s", comma, p->s);
1736 PRINT_UINT_ARG(" ", c->conn_limit);
1749 print_icmp6types((ipfw_insn_u32 *)cmd);
1753 print_ext6hdr( (ipfw_insn *) cmd );
1757 if (F_LEN(cmd) == 1)
1758 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1760 print_newports((ipfw_insn_u16 *)cmd, 0,
1765 printf(" [opcode %d len %d]",
1766 cmd->opcode, cmd->len);
1769 if (cmd->len & F_OR) {
1772 } else if (or_block) {
1777 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
1780 printf(" // %s", comment);
1785 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1787 struct protoent *pe;
1790 char buf[INET6_ADDRSTRLEN];
1792 if (!co.do_expired) {
1793 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1796 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1797 printf("%05d", rulenum);
1798 if (pcwidth > 0 || bcwidth > 0) {
1800 pr_u64(&d->pcnt, pcwidth);
1801 pr_u64(&d->bcnt, bcwidth);
1802 printf("(%ds)", d->expire);
1804 switch (d->dyn_type) {
1805 case O_LIMIT_PARENT:
1806 printf(" PARENT %d", d->count);
1811 case O_KEEP_STATE: /* bidir, no mask */
1816 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1817 printf(" %s", pe->p_name);
1819 printf(" proto %u", d->id.proto);
1821 if (d->id.addr_type == 4) {
1822 a.s_addr = htonl(d->id.src_ip);
1823 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1825 a.s_addr = htonl(d->id.dst_ip);
1826 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1827 } else if (d->id.addr_type == 6) {
1828 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1829 sizeof(buf)), d->id.src_port);
1830 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1831 sizeof(buf)), d->id.dst_port);
1833 printf(" UNKNOWN <-> UNKNOWN\n");
1839 * This one handles all set-related commands
1840 * ipfw set { show | enable | disable }
1842 * ipfw set move X to Y
1843 * ipfw set move rule X to Y
1846 ipfw_sets_handler(char *av[])
1848 uint32_t set_disable, masks[2];
1851 uint8_t cmd, new_set;
1856 errx(EX_USAGE, "set needs command");
1857 if (_substrcmp(*av, "show") == 0) {
1862 nalloc = nbytes = sizeof(struct ip_fw);
1863 while (nbytes >= nalloc) {
1866 nalloc = nalloc * 2 + 200;
1868 data = safe_calloc(1, nbytes);
1869 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1870 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1873 bcopy(&((struct ip_fw *)data)->next_rule,
1874 &set_disable, sizeof(set_disable));
1876 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1877 if ((set_disable & (1<<i))) {
1878 printf("%s %d", msg, i);
1881 msg = (set_disable) ? " enable" : "enable";
1882 for (i = 0; i < RESVD_SET; i++)
1883 if (!(set_disable & (1<<i))) {
1884 printf("%s %d", msg, i);
1888 } else if (_substrcmp(*av, "swap") == 0) {
1890 if ( av[0] == NULL || av[1] == NULL )
1891 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1892 rulenum = atoi(av[0]);
1893 new_set = atoi(av[1]);
1894 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1895 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1896 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1897 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1898 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1899 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1900 } else if (_substrcmp(*av, "move") == 0) {
1902 if (av[0] && _substrcmp(*av, "rule") == 0) {
1907 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1908 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1909 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1910 rulenum = atoi(av[0]);
1911 new_set = atoi(av[2]);
1912 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1913 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1914 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1915 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1916 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1917 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1918 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1919 } else if (_substrcmp(*av, "disable") == 0 ||
1920 _substrcmp(*av, "enable") == 0 ) {
1921 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1924 masks[0] = masks[1] = 0;
1927 if (isdigit(**av)) {
1929 if (i < 0 || i > RESVD_SET)
1931 "invalid set number %d\n", i);
1932 masks[which] |= (1<<i);
1933 } else if (_substrcmp(*av, "disable") == 0)
1935 else if (_substrcmp(*av, "enable") == 0)
1939 "invalid set command %s\n", *av);
1942 if ( (masks[0] & masks[1]) != 0 )
1944 "cannot enable and disable the same set\n");
1946 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1948 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1950 errx(EX_USAGE, "invalid set command %s\n", *av);
1954 ipfw_sysctl_handler(char *av[], int which)
1958 if (av[0] == NULL) {
1959 warnx("missing keyword to enable/disable\n");
1960 } else if (_substrcmp(*av, "firewall") == 0) {
1961 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1962 &which, sizeof(which));
1963 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
1964 &which, sizeof(which));
1965 } else if (_substrcmp(*av, "one_pass") == 0) {
1966 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1967 &which, sizeof(which));
1968 } else if (_substrcmp(*av, "debug") == 0) {
1969 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1970 &which, sizeof(which));
1971 } else if (_substrcmp(*av, "verbose") == 0) {
1972 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1973 &which, sizeof(which));
1974 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1975 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1976 &which, sizeof(which));
1978 } else if (_substrcmp(*av, "altq") == 0) {
1979 altq_set_enabled(which);
1982 warnx("unrecognize enable/disable keyword: %s\n", *av);
1987 ipfw_list(int ac, char *av[], int show_counters)
1990 ipfw_dyn_rule *dynrules, *d;
1992 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1995 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1996 int exitval = EX_OK;
2004 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
2005 int nalloc = 1024; /* start somewhere... */
2010 fprintf(stderr, "Testing only, list disabled\n");
2014 dummynet_list(ac, av, show_counters);
2021 /* get rules or pipes from kernel, resizing array as necessary */
2024 while (nbytes >= nalloc) {
2025 nalloc = nalloc * 2 + 200;
2027 data = safe_realloc(data, nbytes);
2028 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
2029 err(EX_OSERR, "getsockopt(IP_%s_GET)",
2030 co.do_pipe ? "DUMMYNET" : "FW");
2034 * Count static rules. They have variable size so we
2035 * need to scan the list to count them.
2037 for (nstat = 1, r = data, lim = (char *)data + nbytes;
2038 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
2039 ++nstat, r = NEXT(r) )
2043 * Count dynamic rules. This is easier as they have
2047 dynrules = (ipfw_dyn_rule *)r ;
2048 n = (char *)r - (char *)data;
2049 ndyn = (nbytes - n) / sizeof *dynrules;
2051 /* if showing stats, figure out column widths ahead of time */
2052 bcwidth = pcwidth = 0;
2053 if (show_counters) {
2054 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2055 /* skip rules from another set */
2056 if (co.use_set && r->set != co.use_set - 1)
2059 /* packet counter */
2060 width = pr_u64(&r->pcnt, 0);
2061 if (width > pcwidth)
2065 width = pr_u64(&r->bcnt, 0);
2066 if (width > bcwidth)
2070 if (co.do_dynamic && ndyn) {
2071 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2073 /* skip rules from another set */
2074 bcopy((char *)&d->rule + sizeof(uint16_t),
2075 &set, sizeof(uint8_t));
2076 if (set != co.use_set - 1)
2079 width = pr_u64(&d->pcnt, 0);
2080 if (width > pcwidth)
2083 width = pr_u64(&d->bcnt, 0);
2084 if (width > bcwidth)
2088 /* if no rule numbers were specified, list all rules */
2090 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
2091 if (co.use_set && r->set != co.use_set - 1)
2093 show_ipfw(r, pcwidth, bcwidth);
2096 if (co.do_dynamic && ndyn) {
2097 printf("## Dynamic rules (%d):\n", ndyn);
2098 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2100 bcopy((char *)&d->rule + sizeof(uint16_t),
2101 &set, sizeof(uint8_t));
2102 if (set != co.use_set - 1)
2105 show_dyn_ipfw(d, pcwidth, bcwidth);
2111 /* display specific rules requested on command line */
2113 for (lac = ac, lav = av; lac != 0; lac--) {
2114 /* convert command line rule # */
2115 last = rnum = strtoul(*lav++, &endptr, 10);
2117 last = strtoul(endptr+1, &endptr, 10);
2120 warnx("invalid rule number: %s", *(lav - 1));
2123 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
2124 if (r->rulenum > last)
2126 if (co.use_set && r->set != co.use_set - 1)
2128 if (r->rulenum >= rnum && r->rulenum <= last) {
2129 show_ipfw(r, pcwidth, bcwidth);
2134 /* give precedence to other error(s) */
2135 if (exitval == EX_OK)
2136 exitval = EX_UNAVAILABLE;
2137 warnx("rule %lu does not exist", rnum);
2141 if (co.do_dynamic && ndyn) {
2142 printf("## Dynamic rules:\n");
2143 for (lac = ac, lav = av; lac != 0; lac--) {
2144 last = rnum = strtoul(*lav++, &endptr, 10);
2146 last = strtoul(endptr+1, &endptr, 10);
2148 /* already warned */
2150 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2153 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2157 bcopy((char *)&d->rule + sizeof(uint16_t),
2158 &set, sizeof(uint8_t));
2159 if (set != co.use_set - 1)
2162 if (r->rulenum >= rnum && r->rulenum <= last)
2163 show_dyn_ipfw(d, pcwidth, bcwidth);
2173 if (exitval != EX_OK)
2179 lookup_host (char *host, struct in_addr *ipaddr)
2183 if (!inet_aton(host, ipaddr)) {
2184 if ((he = gethostbyname(host)) == NULL)
2186 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2192 * fills the addr and mask fields in the instruction as appropriate from av.
2193 * Update length as appropriate.
2194 * The following formats are allowed:
2195 * me returns O_IP_*_ME
2196 * 1.2.3.4 single IP address
2197 * 1.2.3.4:5.6.7.8 address:mask
2198 * 1.2.3.4/24 address/mask
2199 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
2200 * We can have multiple comma-separated address/mask entries.
2203 fill_ip(ipfw_insn_ip *cmd, char *av, int cblen)
2206 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2207 uint32_t tables_max;
2209 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2211 if (_substrcmp(av, "any") == 0)
2214 if (_substrcmp(av, "me") == 0) {
2215 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2219 if (strncmp(av, "table(", 6) == 0) {
2220 char *p = strchr(av + 6, ',');
2224 cmd->o.opcode = O_IP_DST_LOOKUP;
2225 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2226 tables_max = ipfw_get_tables_max();
2227 if (cmd->o.arg1 > tables_max)
2228 errx(EX_USAGE, "The table number exceeds the maximum "
2229 "allowed value (%u)", tables_max - 1);
2231 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2232 d[0] = strtoul(p, NULL, 0);
2234 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2240 * After the address we can have '/' or ':' indicating a mask,
2241 * ',' indicating another address follows, '{' indicating a
2242 * set of addresses of unspecified size.
2244 char *t = NULL, *p = strpbrk(av, "/:,{");
2248 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len);
2253 if ((t = strpbrk(p, ",{")) != NULL) {
2260 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2261 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2264 if (!inet_aton(p, (struct in_addr *)&d[1]))
2265 errx(EX_DATAERR, "bad netmask ``%s''", p);
2270 d[1] = htonl(0); /* mask */
2271 else if (masklen > 32)
2272 errx(EX_DATAERR, "bad width ``%s''", p);
2274 d[1] = htonl(~0 << (32 - masklen));
2276 case '{': /* no mask, assume /24 and put back the '{' */
2277 d[1] = htonl(~0 << (32 - 24));
2281 case ',': /* single address plus continuation */
2284 case 0: /* initialization value */
2286 d[1] = htonl(~0); /* force /32 */
2289 d[0] &= d[1]; /* mask base address with mask */
2292 /* find next separator */
2294 p = strpbrk(p, ",{");
2295 if (p && *p == '{') {
2297 * We have a set of addresses. They are stored as follows:
2298 * arg1 is the set size (powers of 2, 2..256)
2299 * addr is the base address IN HOST FORMAT
2300 * mask.. is an array of arg1 bits (rounded up to
2301 * the next multiple of 32) with bits set
2302 * for each host in the map.
2304 uint32_t *map = (uint32_t *)&cmd->mask;
2306 int i = contigmask((uint8_t *)&(d[1]), 32);
2309 errx(EX_DATAERR, "address set cannot be in a list");
2310 if (i < 24 || i > 31)
2311 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2312 cmd->o.arg1 = 1<<(32-i); /* map length */
2313 d[0] = ntohl(d[0]); /* base addr in host format */
2314 cmd->o.opcode = O_IP_DST_SET; /* default */
2315 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2316 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2317 map[i] = 0; /* clear map */
2321 high = low + cmd->o.arg1 - 1;
2323 * Here, i stores the previous value when we specify a range
2324 * of addresses within a mask, e.g. 45-63. i = -1 means we
2325 * have no previous value.
2327 i = -1; /* previous value in a range */
2328 while (isdigit(*av)) {
2330 int a = strtol(av, &s, 0);
2332 if (s == av) { /* no parameter */
2334 errx(EX_DATAERR, "set not closed\n");
2336 errx(EX_DATAERR, "incomplete range %d-", i);
2339 if (a < low || a > high)
2340 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2343 if (i == -1) /* no previous in range */
2345 else { /* check that range is valid */
2347 errx(EX_DATAERR, "invalid range %d-%d",
2350 errx(EX_DATAERR, "double '-' in range");
2353 map[i/32] |= 1<<(i & 31);
2364 if (av) /* then *av must be a ',' */
2367 /* Check this entry */
2368 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2370 * 'any' turns the entire list into a NOP.
2371 * 'not any' never matches, so it is removed from the
2372 * list unless it is the only item, in which case we
2375 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2376 if (av == NULL && len == 0) /* only this entry */
2377 errx(EX_DATAERR, "not any never matches");
2379 /* else do nothing and skip this entry */
2382 /* A single IP can be stored in an optimized format */
2383 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2384 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2387 len += 2; /* two words... */
2390 if (len + 1 > F_LEN_MASK)
2391 errx(EX_DATAERR, "address list too long");
2392 cmd->o.len |= len+1;
2396 /* n2mask sets n bits of the mask */
2398 n2mask(struct in6_addr *mask, int n)
2400 static int minimask[9] =
2401 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2404 memset(mask, 0, sizeof(struct in6_addr));
2405 p = (u_char *) mask;
2406 for (; n > 0; p++, n -= 8) {
2416 * helper function to process a set of flags and set bits in the
2417 * appropriate masks.
2420 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2421 struct _s_x *flags, char *p)
2423 uint8_t set=0, clear=0;
2426 char *q; /* points to the separator */
2428 uint8_t *which; /* mask we are working on */
2438 val = match_token(flags, p);
2440 errx(EX_DATAERR, "invalid flag %s", p);
2441 *which |= (uint8_t)val;
2444 cmd->opcode = opcode;
2445 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2446 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2451 ipfw_delete(char *av[])
2455 int exitval = EX_OK;
2459 NEED1("missing rule specification");
2460 if ( *av && _substrcmp(*av, "set") == 0) {
2461 /* Do not allow using the following syntax:
2462 * ipfw set N delete set M
2465 errx(EX_DATAERR, "invalid syntax");
2466 do_set = 1; /* delete set */
2471 while (*av && isdigit(**av)) {
2472 i = atoi(*av); av++;
2474 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2476 exitval = EX_UNAVAILABLE;
2477 warn("rule %u not available", i);
2479 } else if (co.do_pipe) {
2480 exitval = ipfw_delete_pipe(co.do_pipe, i);
2483 rulenum = (i & 0xffff) | (5 << 24) |
2484 ((co.use_set - 1) << 16);
2486 rulenum = (i & 0xffff) | (do_set << 24);
2487 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2489 exitval = EX_UNAVAILABLE;
2490 warn("rule %u: setsockopt(IP_FW_DEL)",
2495 if (exitval != EX_OK)
2501 * fill the interface structure. We do not check the name as we can
2502 * create interfaces dynamically, so checking them at insert time
2503 * makes relatively little sense.
2504 * Interface names containing '*', '?', or '[' are assumed to be shell
2505 * patterns which match interfaces.
2508 fill_iface(ipfw_insn_if *cmd, char *arg, int cblen)
2510 cmd->name[0] = '\0';
2511 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2515 /* Parse the interface or address */
2516 if (strcmp(arg, "any") == 0)
2517 cmd->o.len = 0; /* effectively ignore this command */
2518 else if (strncmp(arg, "table(", 6) == 0) {
2519 char *p = strchr(arg + 6, ',');
2522 cmd->name[0] = '\1'; /* Special value indicating table */
2523 cmd->p.glob = strtoul(arg + 6, NULL, 0);
2524 } else if (!isdigit(*arg)) {
2525 strlcpy(cmd->name, arg, sizeof(cmd->name));
2526 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2527 } else if (!inet_aton(arg, &cmd->p.ip))
2528 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2532 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2536 char *ap, *ptr, *optr;
2537 struct ether_addr *mac;
2538 const char *macset = "0123456789abcdefABCDEF:";
2540 if (strcmp(p, "any") == 0) {
2541 for (i = 0; i < ETHER_ADDR_LEN; i++)
2542 addr[i] = mask[i] = 0;
2546 optr = ptr = strdup(p);
2547 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2549 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2550 errx(EX_DATAERR, "Incorrect MAC address");
2551 bcopy(mac, addr, ETHER_ADDR_LEN);
2553 errx(EX_DATAERR, "Incorrect MAC address");
2555 if (ptr != NULL) { /* we have mask? */
2556 if (p[ptr - optr - 1] == '/') { /* mask len */
2557 long ml = strtol(ptr, &ap, 10);
2558 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2559 errx(EX_DATAERR, "Incorrect mask length");
2560 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2561 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2564 if (strspn(ptr, macset) != l ||
2565 (mac = ether_aton(ptr)) == NULL)
2566 errx(EX_DATAERR, "Incorrect mask");
2567 bcopy(mac, mask, ETHER_ADDR_LEN);
2569 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2570 for (i = 0; i < ETHER_ADDR_LEN; i++)
2573 for (i = 0; i < ETHER_ADDR_LEN; i++)
2580 * helper function, updates the pointer to cmd with the length
2581 * of the current command, and also cleans up the first word of
2582 * the new command in case it has been clobbered before.
2585 next_cmd(ipfw_insn *cmd, int *len)
2588 CHECK_LENGTH(*len, 0);
2590 bzero(cmd, sizeof(*cmd));
2595 * Takes arguments and copies them into a comment
2598 fill_comment(ipfw_insn *cmd, char **av, int cblen)
2601 char *p = (char *)(cmd + 1);
2603 cmd->opcode = O_NOP;
2604 cmd->len = (cmd->len & (F_NOT | F_OR));
2606 /* Compute length of comment string. */
2607 for (i = 0, l = 0; av[i] != NULL; i++)
2608 l += strlen(av[i]) + 1;
2613 "comment too long (max 80 chars)");
2615 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2618 for (i = 0; av[i] != NULL; i++) {
2627 * A function to fill simple commands of size 1.
2628 * Existing flags are preserved.
2631 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2633 cmd->opcode = opcode;
2634 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2639 * Fetch and add the MAC address and type, with masks. This generates one or
2640 * two microinstructions, and returns the pointer to the last one.
2643 add_mac(ipfw_insn *cmd, char *av[], int cblen)
2647 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2648 errx(EX_DATAERR, "MAC dst src");
2650 cmd->opcode = O_MACADDR2;
2651 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2654 mac = (ipfw_insn_mac *)cmd;
2655 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2656 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2657 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2662 add_mactype(ipfw_insn *cmd, char *av, int cblen)
2665 errx(EX_DATAERR, "missing MAC type");
2666 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2667 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE,
2669 cmd->opcode = O_MAC_TYPE;
2676 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2678 struct protoent *pe;
2682 proto = strtol(av, &ep, 10);
2683 if (*ep != '\0' || proto <= 0) {
2684 if ((pe = getprotobyname(av)) == NULL)
2686 proto = pe->p_proto;
2689 fill_cmd(cmd, O_PROTO, 0, proto);
2695 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2697 u_char proto = IPPROTO_IP;
2699 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2700 ; /* do not set O_IP4 nor O_IP6 */
2701 else if (strcmp(av, "ip4") == 0)
2702 /* explicit "just IPv4" rule */
2703 fill_cmd(cmd, O_IP4, 0, 0);
2704 else if (strcmp(av, "ip6") == 0) {
2705 /* explicit "just IPv6" rule */
2706 proto = IPPROTO_IPV6;
2707 fill_cmd(cmd, O_IP6, 0, 0);
2709 return add_proto0(cmd, av, protop);
2716 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2718 u_char proto = IPPROTO_IP;
2720 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2721 ; /* do not set O_IP4 nor O_IP6 */
2722 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2723 /* explicit "just IPv4" rule */
2724 fill_cmd(cmd, O_IP4, 0, 0);
2725 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2726 /* explicit "just IPv6" rule */
2727 proto = IPPROTO_IPV6;
2728 fill_cmd(cmd, O_IP6, 0, 0);
2730 return add_proto0(cmd, av, protop);
2737 add_srcip(ipfw_insn *cmd, char *av, int cblen)
2739 fill_ip((ipfw_insn_ip *)cmd, av, cblen);
2740 if (cmd->opcode == O_IP_DST_SET) /* set */
2741 cmd->opcode = O_IP_SRC_SET;
2742 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2743 cmd->opcode = O_IP_SRC_LOOKUP;
2744 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2745 cmd->opcode = O_IP_SRC_ME;
2746 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2747 cmd->opcode = O_IP_SRC;
2748 else /* addr/mask */
2749 cmd->opcode = O_IP_SRC_MASK;
2754 add_dstip(ipfw_insn *cmd, char *av, int cblen)
2756 fill_ip((ipfw_insn_ip *)cmd, av, cblen);
2757 if (cmd->opcode == O_IP_DST_SET) /* set */
2759 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2761 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2762 cmd->opcode = O_IP_DST_ME;
2763 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2764 cmd->opcode = O_IP_DST;
2765 else /* addr/mask */
2766 cmd->opcode = O_IP_DST_MASK;
2771 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen)
2773 /* XXX "any" is trapped before. Perhaps "to" */
2774 if (_substrcmp(av, "any") == 0) {
2776 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) {
2777 /* XXX todo: check that we have a protocol with ports */
2778 cmd->opcode = opcode;
2785 add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen)
2789 ipfw_insn *ret = NULL;
2791 if ((host = strdup(av)) == NULL)
2793 if ((ch = strrchr(host, '/')) != NULL)
2796 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2797 inet_pton(AF_INET6, host, &a) == 1)
2798 ret = add_srcip6(cmd, av, cblen);
2799 /* XXX: should check for IPv4, not !IPv6 */
2800 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2801 inet_pton(AF_INET6, host, &a) != 1))
2802 ret = add_srcip(cmd, av, cblen);
2803 if (ret == NULL && strcmp(av, "any") != 0)
2811 add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen)
2815 ipfw_insn *ret = NULL;
2817 if ((host = strdup(av)) == NULL)
2819 if ((ch = strrchr(host, '/')) != NULL)
2822 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2823 inet_pton(AF_INET6, host, &a) == 1)
2824 ret = add_dstip6(cmd, av, cblen);
2825 /* XXX: should check for IPv4, not !IPv6 */
2826 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2827 inet_pton(AF_INET6, host, &a) != 1))
2828 ret = add_dstip(cmd, av, cblen);
2829 if (ret == NULL && strcmp(av, "any") != 0)
2837 * Parse arguments and assemble the microinstructions which make up a rule.
2838 * Rules are added into the 'rulebuf' and then copied in the correct order
2839 * into the actual rule.
2841 * The syntax for a rule starts with the action, followed by
2842 * optional action parameters, and the various match patterns.
2843 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2844 * (generated if the rule includes a keep-state option), then the
2845 * various match patterns, log/altq actions, and the actual action.
2849 ipfw_add(char *av[])
2852 * rules are added into the 'rulebuf' and then copied in
2853 * the correct order into the actual rule.
2854 * Some things that need to go out of order (prob, action etc.)
2857 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2858 int rblen, ablen, cblen;
2860 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2861 ipfw_insn *first_cmd; /* first match pattern */
2866 * various flags used to record that we entered some fields.
2868 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2869 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2874 int open_par = 0; /* open parenthesis ( */
2876 /* proto is here because it is used to fetch ports */
2877 u_char proto = IPPROTO_IP; /* default protocol */
2879 double match_prob = 1; /* match probability, default is always match */
2881 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2882 bzero(cmdbuf, sizeof(cmdbuf));
2883 bzero(rulebuf, sizeof(rulebuf));
2885 rule = (struct ip_fw *)rulebuf;
2886 cmd = (ipfw_insn *)cmdbuf;
2887 action = (ipfw_insn *)actbuf;
2889 rblen = sizeof(rulebuf) / sizeof(rulebuf[0]);
2890 rblen -= offsetof(struct ip_fw, cmd) / sizeof(rulebuf[0]);
2891 ablen = sizeof(actbuf) / sizeof(actbuf[0]);
2892 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]);
2893 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1;
2895 #define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; }
2896 #define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len)
2900 /* [rule N] -- Rule number optional */
2901 if (av[0] && isdigit(**av)) {
2902 rule->rulenum = atoi(*av);
2906 /* [set N] -- set number (0..RESVD_SET), optional */
2907 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
2908 int set = strtoul(av[1], NULL, 10);
2909 if (set < 0 || set > RESVD_SET)
2910 errx(EX_DATAERR, "illegal set %s", av[1]);
2915 /* [prob D] -- match probability, optional */
2916 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2917 match_prob = strtod(av[1], NULL);
2919 if (match_prob <= 0 || match_prob > 1)
2920 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2924 /* action -- mandatory */
2925 NEED1("missing action");
2926 i = match_token(rule_actions, *av);
2928 action->len = 1; /* default */
2931 case TOK_CHECKSTATE:
2932 have_state = action;
2933 action->opcode = O_CHECK_STATE;
2937 action->opcode = O_ACCEPT;
2941 action->opcode = O_DENY;
2946 action->opcode = O_REJECT;
2947 action->arg1 = ICMP_UNREACH_HOST;
2951 action->opcode = O_REJECT;
2952 action->arg1 = ICMP_REJECT_RST;
2956 action->opcode = O_UNREACH6;
2957 action->arg1 = ICMP6_UNREACH_RST;
2961 action->opcode = O_REJECT;
2962 NEED1("missing reject code");
2963 fill_reject_code(&action->arg1, *av);
2968 action->opcode = O_UNREACH6;
2969 NEED1("missing unreach code");
2970 fill_unreach6_code(&action->arg1, *av);
2975 action->opcode = O_COUNT;
2979 action->opcode = O_NAT;
2980 action->len = F_INSN_SIZE(ipfw_insn_nat);
2982 if (_substrcmp(*av, "global") == 0) {
2990 action->opcode = O_QUEUE;
2993 action->opcode = O_PIPE;
2996 action->opcode = O_SKIPTO;
2999 action->opcode = O_NETGRAPH;
3002 action->opcode = O_NGTEE;
3005 action->opcode = O_DIVERT;
3008 action->opcode = O_TEE;
3011 action->opcode = O_CALLRETURN;
3014 errx(EX_USAGE, "missing argument for %s", *(av - 1));
3015 if (isdigit(**av)) {
3016 action->arg1 = strtoul(*av, NULL, 10);
3017 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
3018 errx(EX_DATAERR, "illegal argument for %s",
3020 } else if (_substrcmp(*av, "tablearg") == 0) {
3021 action->arg1 = IP_FW_TABLEARG;
3022 } else if (i == TOK_DIVERT || i == TOK_TEE) {
3025 s = getservbyname(av[0], "divert");
3027 action->arg1 = ntohs(s->s_port);
3029 errx(EX_DATAERR, "illegal divert/tee port");
3031 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
3037 * Locate the address-port separator (':' or ',').
3038 * Could be one of the following:
3042 * IPv6 w:x:y::z,port
3043 * The ':' can only be used with hostname and IPv4 address.
3044 * XXX-BZ Should we also support [w:x:y::z]:port?
3046 struct sockaddr_storage result;
3047 struct addrinfo *res;
3050 u_short port_number;
3052 NEED1("missing forward address[:port]");
3055 * locate the address-port separator (':' or ',')
3057 s = strchr(*av, ',');
3059 /* Distinguish between IPv4:port and IPv6 cases. */
3060 s = strchr(*av, ':');
3061 if (s && strchr(s+1, ':'))
3062 s = NULL; /* no port */
3067 /* Terminate host portion and set s to start of port. */
3069 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
3072 "illegal forwarding port ``%s''", s);
3073 port_number = (u_short)i;
3076 if (_substrcmp(*av, "tablearg") == 0) {
3078 ((struct sockaddr_in*)&result)->sin_addr.s_addr =
3082 * Resolve the host name or address to a family and a
3083 * network representation of the addres.
3085 if (getaddrinfo(*av, NULL, NULL, &res))
3086 errx(EX_DATAERR, NULL);
3087 /* Just use the first host in the answer. */
3088 family = res->ai_family;
3089 memcpy(&result, res->ai_addr, res->ai_addrlen);
3093 if (family == PF_INET) {
3094 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
3096 action->opcode = O_FORWARD_IP;
3097 action->len = F_INSN_SIZE(ipfw_insn_sa);
3101 * In the kernel we assume AF_INET and use only
3102 * sin_port and sin_addr. Remember to set sin_len as
3103 * the routing code seems to use it too.
3105 p->sa.sin_len = sizeof(struct sockaddr_in);
3106 p->sa.sin_family = AF_INET;
3107 p->sa.sin_port = port_number;
3108 p->sa.sin_addr.s_addr =
3109 ((struct sockaddr_in *)&result)->sin_addr.s_addr;
3110 } else if (family == PF_INET6) {
3111 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
3113 action->opcode = O_FORWARD_IP6;
3114 action->len = F_INSN_SIZE(ipfw_insn_sa6);
3117 p->sa.sin6_len = sizeof(struct sockaddr_in6);
3118 p->sa.sin6_family = AF_INET6;
3119 p->sa.sin6_port = port_number;
3120 p->sa.sin6_flowinfo = 0;
3121 p->sa.sin6_scope_id = 0;
3122 /* No table support for v6 yet. */
3123 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
3124 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
3126 errx(EX_DATAERR, "Invalid address family in forward action");
3132 /* pretend it is a 'count' rule followed by the comment */
3133 action->opcode = O_COUNT;
3134 av--; /* go back... */
3140 size_t intsize = sizeof(int);
3142 action->opcode = O_SETFIB;
3143 NEED1("missing fib number");
3144 if (_substrcmp(*av, "tablearg") == 0) {
3145 action->arg1 = IP_FW_TABLEARG;
3147 action->arg1 = strtoul(*av, NULL, 10);
3148 if (sysctlbyname("net.fibs", &numfibs, &intsize,
3150 errx(EX_DATAERR, "fibs not suported.\n");
3151 if (action->arg1 >= numfibs) /* Temporary */
3152 errx(EX_DATAERR, "fib too large.\n");
3162 action->opcode = O_SETDSCP;
3163 NEED1("missing DSCP code");
3164 if (_substrcmp(*av, "tablearg") == 0) {
3165 action->arg1 = IP_FW_TABLEARG;
3166 } else if (isalpha(*av[0])) {
3167 if ((code = match_token(f_ipdscp, *av)) == -1)
3168 errx(EX_DATAERR, "Unknown DSCP code");
3169 action->arg1 = code;
3171 action->arg1 = strtoul(*av, NULL, 10);
3177 action->opcode = O_REASS;
3181 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
3185 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
3187 action = next_cmd(action, &ablen);
3190 * [altq queuename] -- altq tag, optional
3191 * [log [logamount N]] -- log, optional
3193 * If they exist, it go first in the cmdbuf, but then it is
3194 * skipped in the copy section to the end of the buffer.
3196 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
3201 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
3206 "log cannot be specified more than once");
3207 have_log = (ipfw_insn *)c;
3208 cmd->len = F_INSN_SIZE(ipfw_insn_log);
3210 cmd->opcode = O_LOG;
3211 if (av[0] && _substrcmp(*av, "logamount") == 0) {
3213 NEED1("logamount requires argument");
3217 "logamount must be positive");
3221 len = sizeof(c->max_log);
3222 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
3223 &c->max_log, &len, NULL, 0) == -1) {
3228 errx(1, "sysctlbyname(\"%s\")",
3229 "net.inet.ip.fw.verbose_limit");
3238 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
3240 NEED1("missing altq queue name");
3243 "altq cannot be specified more than once");
3244 have_altq = (ipfw_insn *)a;
3245 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
3247 cmd->opcode = O_ALTQ;
3248 a->qid = altq_name_to_qid(*av);
3259 errx(EX_USAGE, "tag and untag cannot be "
3260 "specified more than once");
3261 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
3262 rule_action_params);
3264 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
3272 cmd = next_cmd(cmd, &cblen);
3275 if (have_state) /* must be a check-state, we are done */
3278 #define OR_START(target) \
3279 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
3281 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
3284 if ( (av[0])[1] == '\0') { \
3295 strcmp(*av, ")") == 0 || \
3296 strcmp(*av, "}") == 0)) { \
3301 errx(EX_USAGE, "missing \")\"\n"); \
3305 if (av[0] && _substrcmp(*av, "not") == 0) { \
3306 if (cmd->len & F_NOT) \
3307 errx(EX_USAGE, "double \"not\" not allowed\n"); \
3308 cmd->len |= F_NOT; \
3312 #define OR_BLOCK(target) \
3313 if (av[0] && _substrcmp(*av, "or") == 0) { \
3314 if (prev == NULL || open_par == 0) \
3315 errx(EX_DATAERR, "invalid OR block"); \
3316 prev->len |= F_OR; \
3326 * MAC addresses, optional.
3327 * If we have this, we skip the part "proto from src to dst"
3328 * and jump straight to the option parsing.
3331 NEED1("missing protocol");
3332 if (_substrcmp(*av, "MAC") == 0 ||
3333 _substrcmp(*av, "mac") == 0) {
3334 av++; /* the "MAC" keyword */
3335 add_mac(cmd, av); /* exits in case of errors */
3336 cmd = next_cmd(cmd);
3337 av += 2; /* dst-mac and src-mac */
3339 NEED1("missing mac type");
3340 if (add_mactype(cmd, av[0]))
3341 cmd = next_cmd(cmd);
3342 av++; /* any or mac-type */
3348 * protocol, mandatory
3350 OR_START(get_proto);
3352 NEED1("missing protocol");
3353 if (add_proto_compat(cmd, *av, &proto)) {
3355 if (F_LEN(cmd) != 0) {
3357 cmd = next_cmd(cmd, &cblen);
3359 } else if (first_cmd != cmd) {
3360 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3363 OR_BLOCK(get_proto);
3368 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3369 errx(EX_USAGE, "missing ``from''");
3373 * source IP, mandatory
3375 OR_START(source_ip);
3376 NOT_BLOCK; /* optional "not" */
3377 NEED1("missing source address");
3378 if (add_src(cmd, *av, proto, cblen)) {
3380 if (F_LEN(cmd) != 0) { /* ! any */
3382 cmd = next_cmd(cmd, &cblen);
3385 errx(EX_USAGE, "bad source address %s", *av);
3386 OR_BLOCK(source_ip);
3389 * source ports, optional
3391 NOT_BLOCK; /* optional "not" */
3392 if ( av[0] != NULL ) {
3393 if (_substrcmp(*av, "any") == 0 ||
3394 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
3396 if (F_LEN(cmd) != 0)
3397 cmd = next_cmd(cmd, &cblen);
3404 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3405 errx(EX_USAGE, "missing ``to''");
3409 * destination, mandatory
3412 NOT_BLOCK; /* optional "not" */
3413 NEED1("missing dst address");
3414 if (add_dst(cmd, *av, proto, cblen)) {
3416 if (F_LEN(cmd) != 0) { /* ! any */
3418 cmd = next_cmd(cmd, &cblen);
3421 errx( EX_USAGE, "bad destination address %s", *av);
3425 * dest. ports, optional
3427 NOT_BLOCK; /* optional "not" */
3429 if (_substrcmp(*av, "any") == 0 ||
3430 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
3432 if (F_LEN(cmd) != 0)
3433 cmd = next_cmd(cmd, &cblen);
3438 if (av[0] && first_cmd == cmd) {
3440 * nothing specified so far, store in the rule to ease
3446 while ( av[0] != NULL ) {
3448 ipfw_insn_u32 *cmd32; /* alias for cmd */
3451 cmd32 = (ipfw_insn_u32 *)cmd;
3453 if (*s == '!') { /* alternate syntax for NOT */
3454 if (cmd->len & F_NOT)
3455 errx(EX_USAGE, "double \"not\" not allowed\n");
3459 i = match_token(rule_options, s);
3463 if (cmd->len & F_NOT)
3464 errx(EX_USAGE, "double \"not\" not allowed\n");
3469 if (open_par == 0 || prev == NULL)
3470 errx(EX_USAGE, "invalid \"or\" block\n");
3474 case TOK_STARTBRACE:
3476 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3482 errx(EX_USAGE, "+missing \")\"\n");
3488 fill_cmd(cmd, O_IN, 0, 0);
3492 cmd->len ^= F_NOT; /* toggle F_NOT */
3493 fill_cmd(cmd, O_IN, 0, 0);
3497 fill_cmd(cmd, O_DIVERTED, 0, 3);
3500 case TOK_DIVERTEDLOOPBACK:
3501 fill_cmd(cmd, O_DIVERTED, 0, 1);
3504 case TOK_DIVERTEDOUTPUT:
3505 fill_cmd(cmd, O_DIVERTED, 0, 2);
3509 fill_cmd(cmd, O_FRAG, 0, 0);
3513 fill_cmd(cmd, O_LAYER2, 0, 0);
3519 NEED1("recv, xmit, via require interface name"
3521 fill_iface((ipfw_insn_if *)cmd, av[0], cblen);
3523 if (F_LEN(cmd) == 0) /* not a valid address */
3526 cmd->opcode = O_XMIT;
3527 else if (i == TOK_RECV)
3528 cmd->opcode = O_RECV;
3529 else if (i == TOK_VIA)
3530 cmd->opcode = O_VIA;
3534 NEED1("icmptypes requires list of types");
3535 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3539 case TOK_ICMP6TYPES:
3540 NEED1("icmptypes requires list of types");
3541 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen);
3546 NEED1("ipttl requires TTL");
3547 if (strpbrk(*av, "-,")) {
3548 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen))
3549 errx(EX_DATAERR, "invalid ipttl %s", *av);
3551 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3556 NEED1("ipid requires id");
3557 if (strpbrk(*av, "-,")) {
3558 if (!add_ports(cmd, *av, 0, O_IPID, cblen))
3559 errx(EX_DATAERR, "invalid ipid %s", *av);
3561 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3566 NEED1("iplen requires length");
3567 if (strpbrk(*av, "-,")) {
3568 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen))
3569 errx(EX_DATAERR, "invalid ip len %s", *av);
3571 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3576 NEED1("ipver requires version");
3577 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3581 case TOK_IPPRECEDENCE:
3582 NEED1("ipprecedence requires value");
3583 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3584 (strtoul(*av, NULL, 0) & 7) << 5);
3589 NEED1("missing DSCP code");
3590 fill_dscp(cmd, *av, cblen);
3595 NEED1("missing argument for ipoptions");
3596 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3601 NEED1("missing argument for iptos");
3602 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3607 NEED1("uid requires argument");
3613 cmd->opcode = O_UID;
3614 uid = strtoul(*av, &end, 0);
3615 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3617 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3618 cmd32->d[0] = pwd->pw_uid;
3619 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3625 NEED1("gid requires argument");
3631 cmd->opcode = O_GID;
3632 gid = strtoul(*av, &end, 0);
3633 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3635 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3636 cmd32->d[0] = grp->gr_gid;
3637 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3643 NEED1("jail requires argument");
3648 cmd->opcode = O_JAIL;
3649 jid = (int)strtol(*av, &end, 0);
3650 if (jid < 0 || *end != '\0')
3651 errx(EX_DATAERR, "jail requires prison ID");
3652 cmd32->d[0] = (uint32_t)jid;
3653 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3659 fill_cmd(cmd, O_ESTAB, 0, 0);
3663 fill_cmd(cmd, O_TCPFLAGS, 0,
3664 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3667 case TOK_TCPDATALEN:
3668 NEED1("tcpdatalen requires length");
3669 if (strpbrk(*av, "-,")) {
3670 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen))
3671 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3673 fill_cmd(cmd, O_TCPDATALEN, 0,
3674 strtoul(*av, NULL, 0));
3679 NEED1("missing argument for tcpoptions");
3680 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3686 NEED1("tcpseq/tcpack requires argument");
3687 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3688 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3689 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3694 NEED1("tcpwin requires length");
3695 if (strpbrk(*av, "-,")) {
3696 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen))
3697 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
3699 fill_cmd(cmd, O_TCPWIN, 0,
3700 strtoul(*av, NULL, 0));
3705 NEED1("missing argument for tcpflags");
3706 cmd->opcode = O_TCPFLAGS;
3707 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3713 errx(EX_USAGE, "keep-state cannot be part "
3716 errx(EX_USAGE, "only one of keep-state "
3717 "and limit is allowed");
3719 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3723 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3728 "limit cannot be part of an or block");
3730 errx(EX_USAGE, "only one of keep-state and "
3731 "limit is allowed");
3734 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3736 cmd->opcode = O_LIMIT;
3737 c->limit_mask = c->conn_limit = 0;
3739 while ( av[0] != NULL ) {
3740 if ((val = match_token(limit_masks, *av)) <= 0)
3742 c->limit_mask |= val;
3746 if (c->limit_mask == 0)
3747 errx(EX_USAGE, "limit: missing limit mask");
3749 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3750 TOK_LIMIT, rule_options);
3757 NEED1("missing protocol");
3758 if (add_proto(cmd, *av, &proto)) {
3761 errx(EX_DATAERR, "invalid protocol ``%s''",
3766 NEED1("missing source IP");
3767 if (add_srcip(cmd, *av, cblen)) {
3773 NEED1("missing destination IP");
3774 if (add_dstip(cmd, *av, cblen)) {
3780 NEED1("missing source IP6");
3781 if (add_srcip6(cmd, *av, cblen)) {
3787 NEED1("missing destination IP6");
3788 if (add_dstip6(cmd, *av, cblen)) {
3794 NEED1("missing source port");
3795 if (_substrcmp(*av, "any") == 0 ||
3796 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) {
3799 errx(EX_DATAERR, "invalid source port %s", *av);
3803 NEED1("missing destination port");
3804 if (_substrcmp(*av, "any") == 0 ||
3805 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) {
3808 errx(EX_DATAERR, "invalid destination port %s",
3813 if (add_mac(cmd, av, cblen))
3818 NEED1("missing mac type");
3819 if (!add_mactype(cmd, *av, cblen))
3820 errx(EX_DATAERR, "invalid mac type %s", *av);
3824 case TOK_VERREVPATH:
3825 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3828 case TOK_VERSRCREACH:
3829 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3833 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3837 fill_cmd(cmd, O_IPSEC, 0, 0);
3841 fill_cmd(cmd, O_IP6, 0, 0);
3845 fill_cmd(cmd, O_IP4, 0, 0);
3849 fill_ext6hdr( cmd, *av );
3854 if (proto != IPPROTO_IPV6 )
3855 errx( EX_USAGE, "flow-id filter is active "
3856 "only for ipv6 protocol\n");
3857 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen);
3862 fill_comment(cmd, av, cblen);
3867 if (av[0] && strpbrk(*av, "-,")) {
3868 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen))
3869 errx(EX_DATAERR, "tagged: invalid tag"
3875 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3876 TOK_TAGGED, rule_options);
3877 fill_cmd(cmd, O_TAGGED, 0, tag);
3883 NEED1("fib requires fib number");
3884 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3888 fill_cmd(cmd, O_SOCKARG, 0, 0);
3892 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3896 if (!av[0] || !av[1])
3897 errx(EX_USAGE, "format: lookup argument tablenum");
3898 cmd->opcode = O_IP_DST_LOOKUP;
3899 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3900 i = match_token(rule_options, *av);
3901 for (j = 0; lookup_key[j] >= 0 ; j++) {
3902 if (i == lookup_key[j])
3905 if (lookup_key[j] <= 0)
3906 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3907 __PAST_END(c->d, 1) = j; // i converted to option
3909 cmd->arg1 = strtoul(*av, &p, 0);
3911 errx(EX_USAGE, "format: lookup argument tablenum");
3917 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3919 if (F_LEN(cmd) > 0) { /* prepare to advance */
3921 cmd = next_cmd(cmd, &cblen);
3927 * Now copy stuff into the rule.
3928 * If we have a keep-state option, the first instruction
3929 * must be a PROBE_STATE (which is generated here).
3930 * If we have a LOG option, it was stored as the first command,
3931 * and now must be moved to the top of the action part.
3933 dst = (ipfw_insn *)rule->cmd;
3936 * First thing to write into the command stream is the match probability.
3938 if (match_prob != 1) { /* 1 means always match */
3939 dst->opcode = O_PROB;
3941 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3946 * generate O_PROBE_STATE if necessary
3948 if (have_state && have_state->opcode != O_CHECK_STATE) {
3949 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3950 dst = next_cmd(dst, &rblen);
3953 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3954 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3958 switch (src->opcode) {
3966 bcopy(src, dst, i * sizeof(uint32_t));
3972 * put back the have_state command as last opcode
3974 if (have_state && have_state->opcode != O_CHECK_STATE) {
3975 i = F_LEN(have_state);
3977 bcopy(have_state, dst, i * sizeof(uint32_t));
3981 * start action section
3983 rule->act_ofs = dst - rule->cmd;
3985 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3987 i = F_LEN(have_log);
3989 bcopy(have_log, dst, i * sizeof(uint32_t));
3993 i = F_LEN(have_altq);
3995 bcopy(have_altq, dst, i * sizeof(uint32_t));
3999 i = F_LEN(have_tag);
4001 bcopy(have_tag, dst, i * sizeof(uint32_t));
4006 * copy all other actions
4008 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
4011 bcopy(src, dst, i * sizeof(uint32_t));
4015 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
4016 i = (char *)dst - (char *)rule;
4017 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
4018 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
4020 show_ipfw(rule, 0, 0);
4024 * clear the counters or the log counters.
4027 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
4029 uint32_t arg, saved_arg;
4032 char const *name = optname ? "RESETLOG" : "ZERO";
4034 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
4039 /* clear all entries */
4040 if (do_cmd(optname, NULL, 0) < 0)
4041 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
4043 printf("%s.\n", optname == IP_FW_ZERO ?
4044 "Accounting cleared":"Logging counts reset");
4051 if (isdigit(**av)) {
4052 arg = strtonum(*av, 0, 0xffff, &errstr);
4055 "invalid rule number %s\n", *av);
4058 arg |= (1 << 24) | ((co.use_set - 1) << 16);
4061 if (do_cmd(optname, &arg, sizeof(arg))) {
4062 warn("rule %u: setsockopt(IP_FW_%s)",
4064 failed = EX_UNAVAILABLE;
4065 } else if (!co.do_quiet)
4066 printf("Entry %d %s.\n", saved_arg,
4067 optname == IP_FW_ZERO ?
4068 "cleared" : "logging count reset");
4070 errx(EX_USAGE, "invalid rule number ``%s''", *av);
4073 if (failed != EX_OK)
4078 ipfw_flush(int force)
4080 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
4082 if (!force && !co.do_quiet) { /* need to ask user */
4085 printf("Are you sure? [yn] ");
4088 c = toupper(getc(stdin));
4089 while (c != '\n' && getc(stdin) != '\n')
4091 return; /* and do not flush */
4092 } while (c != 'Y' && c != 'N');
4094 if (c == 'N') /* user said no */
4101 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
4103 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
4104 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
4105 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
4106 } else if (do_cmd(cmd, NULL, 0) < 0)
4107 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
4108 co.do_pipe ? "DUMMYNET" : "FW");
4110 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
4114 static void table_list(uint16_t num, int need_header);
4115 static void table_fill_xentry(char *arg, ipfw_table_xentry *xent);
4118 * Retrieve maximum number of tables supported by ipfw(4) module.
4121 ipfw_get_tables_max()
4124 uint32_t tables_max;
4126 if (ipfw_tables_max != 0)
4127 return (ipfw_tables_max);
4129 len = sizeof(tables_max);
4130 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
4133 tables_max = 128; /* Old conservative default */
4135 errx(1, "Can't determine maximum number of ipfw tables."
4136 " Perhaps you forgot to load ipfw module?");
4139 ipfw_tables_max = tables_max;
4141 return (ipfw_tables_max);
4145 * This one handles all table-related commands
4146 * ipfw table N add addr[/masklen] [value]
4147 * ipfw table N delete addr[/masklen]
4148 * ipfw table {N | all} flush
4149 * ipfw table {N | all} list
4152 ipfw_table_handler(int ac, char *av[])
4154 ipfw_table_xentry xent;
4158 uint32_t tables_max;
4160 tables_max = ipfw_get_tables_max();
4162 memset(&xent, 0, sizeof(xent));
4165 if (ac && isdigit(**av)) {
4166 xent.tbl = atoi(*av);
4169 } else if (ac && _substrcmp(*av, "all") == 0) {
4174 errx(EX_USAGE, "table number or 'all' keyword required");
4175 if (xent.tbl >= tables_max)
4176 errx(EX_USAGE, "The table number exceeds the maximum allowed "
4177 "value (%d)", tables_max - 1);
4178 NEED1("table needs command");
4179 if (is_all && _substrcmp(*av, "list") != 0
4180 && _substrcmp(*av, "flush") != 0)
4181 errx(EX_USAGE, "table number required");
4183 if (_substrcmp(*av, "add") == 0 ||
4184 _substrcmp(*av, "delete") == 0) {
4185 do_add = **av == 'a';
4188 errx(EX_USAGE, "address required");
4190 table_fill_xentry(*av, &xent);
4195 /* isdigit is a bit of a hack here.. */
4196 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
4197 xent.value = strtoul(*av, NULL, 0);
4199 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
4200 /* The value must be stored in host order *
4201 * so that the values < 65k can be distinguished */
4202 xent.value = ntohl(tval);
4204 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4209 if (do_setcmd3(do_add ? IP_FW_TABLE_XADD : IP_FW_TABLE_XDEL,
4210 &xent, xent.len) < 0) {
4211 /* If running silent, don't bomb out on these errors. */
4212 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
4213 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
4214 do_add ? "XADD" : "XDEL");
4215 /* In silent mode, react to a failed add by deleting */
4217 do_setcmd3(IP_FW_TABLE_XDEL, &xent, xent.len);
4218 if (do_setcmd3(IP_FW_TABLE_XADD, &xent, xent.len) < 0)
4220 "setsockopt(IP_FW_TABLE_XADD)");
4223 } else if (_substrcmp(*av, "flush") == 0) {
4224 a = is_all ? tables_max : (uint32_t)(xent.tbl + 1);
4226 if (do_cmd(IP_FW_TABLE_FLUSH, &xent.tbl,
4227 sizeof(xent.tbl)) < 0)
4228 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
4229 } while (++xent.tbl < a);
4230 } else if (_substrcmp(*av, "list") == 0) {
4231 a = is_all ? tables_max : (uint32_t)(xent.tbl + 1);
4233 table_list(xent.tbl, is_all);
4234 } while (++xent.tbl < a);
4236 errx(EX_USAGE, "invalid table command %s", *av);
4240 table_fill_xentry(char *arg, ipfw_table_xentry *xent)
4242 int addrlen, mask, masklen, type;
4243 struct in6_addr *paddr;
4254 * Let's try to guess type by agrument.
4259 * 4) port, uid/gid or other u32 key (base 10 format)
4262 paddr = &xent->k.addr6;
4263 if (ishexnumber(*arg) != 0 || *arg == ':') {
4264 /* Remove / if exists */
4265 if ((p = strchr(arg, '/')) != NULL) {
4270 if (inet_pton(AF_INET, arg, paddr) == 1) {
4271 if (p != NULL && mask > 32)
4272 errx(EX_DATAERR, "bad IPv4 mask width: %s",
4275 type = IPFW_TABLE_CIDR;
4276 masklen = p ? mask : 32;
4277 addrlen = sizeof(struct in_addr);
4278 } else if (inet_pton(AF_INET6, arg, paddr) == 1) {
4279 if (IN6_IS_ADDR_V4COMPAT(paddr))
4281 "Use IPv4 instead of v4-compatible");
4282 if (p != NULL && mask > 128)
4283 errx(EX_DATAERR, "bad IPv6 mask width: %s",
4286 type = IPFW_TABLE_CIDR;
4287 masklen = p ? mask : 128;
4288 addrlen = sizeof(struct in6_addr);
4290 /* Port or any other key */
4291 /* Skip non-base 10 entries like 'fa1' */
4292 key = strtol(arg, &p, 10);
4294 pkey = (uint32_t *)paddr;
4296 type = IPFW_TABLE_CIDR;
4298 addrlen = sizeof(uint32_t);
4299 } else if ((p != arg) && (*p == '.')) {
4301 * Warn on IPv4 address strings
4302 * which are "valid" for inet_aton() but not
4305 * Typical examples: '10.5' or '10.0.0.05'
4308 "Invalid IPv4 address: %s", arg);
4313 if (type == 0 && strchr(arg, '.') == NULL) {
4314 /* Assume interface name. Copy significant data only */
4315 mask = MIN(strlen(arg), IF_NAMESIZE - 1);
4316 memcpy(xent->k.iface, arg, mask);
4317 /* Set mask to exact match */
4318 masklen = 8 * IF_NAMESIZE;
4319 type = IPFW_TABLE_INTERFACE;
4320 addrlen = IF_NAMESIZE;
4324 if (lookup_host(arg, (struct in_addr *)paddr) != 0)
4325 errx(EX_NOHOST, "hostname ``%s'' unknown", arg);
4328 type = IPFW_TABLE_CIDR;
4329 addrlen = sizeof(struct in_addr);
4333 xent->masklen = masklen;
4334 xent->len = offsetof(ipfw_table_xentry, k) + addrlen;
4338 table_list(uint16_t num, int need_header)
4341 ipfw_table_xentry *xent;
4343 uint32_t *a, sz, tval;
4345 struct in6_addr *addr6;
4346 ip_fw3_opheader *op3;
4348 /* Prepend value with IP_FW3 header */
4349 l = sizeof(ip_fw3_opheader) + sizeof(uint32_t);
4351 /* Zero reserved fields */
4352 memset(op3, 0, sizeof(ip_fw3_opheader));
4353 a = (uint32_t *)(op3 + 1);
4355 op3->opcode = IP_FW_TABLE_XGETSIZE;
4356 if (do_cmd(IP_FW3, op3, (uintptr_t)&l) < 0)
4357 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XGETSIZE)");
4359 /* If a is zero we have nothing to do, the table is empty. */
4364 tbl = safe_calloc(1, l);
4365 tbl->opheader.opcode = IP_FW_TABLE_XLIST;
4367 if (do_cmd(IP_FW3, tbl, (uintptr_t)&l) < 0)
4368 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XLIST)");
4369 if (tbl->cnt && need_header)
4370 printf("---table(%d)---\n", tbl->tbl);
4371 sz = tbl->size - sizeof(ipfw_xtable);
4372 xent = &tbl->xent[0];
4374 switch (tbl->type) {
4375 case IPFW_TABLE_CIDR:
4376 /* IPv4 or IPv6 prefixes */
4378 addr6 = &xent->k.addr6;
4381 if (IN6_IS_ADDR_V4COMPAT(addr6)) {
4383 inet_ntop(AF_INET, &addr6->s6_addr32[3], tbuf, sizeof(tbuf));
4386 inet_ntop(AF_INET6, addr6, tbuf, sizeof(tbuf));
4389 if (co.do_value_as_ip) {
4391 printf("%s/%u %s\n", tbuf, xent->masklen,
4392 inet_ntoa(*(struct in_addr *)&tval));
4394 printf("%s/%u %u\n", tbuf, xent->masklen, tval);
4396 case IPFW_TABLE_INTERFACE:
4397 /* Interface names */
4399 if (co.do_value_as_ip) {
4401 printf("%s %s\n", xent->k.iface,
4402 inet_ntoa(*(struct in_addr *)&tval));
4404 printf("%s %u\n", xent->k.iface, tval);
4410 xent = (void *)xent + xent->len;