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;
64 #define s6_addr32 __u6_addr.__u6_addr32
67 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
69 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
70 if (_substrcmp(*av, "tablearg") == 0) { \
71 arg = IP_FW_TABLEARG; \
79 _xval = strtol(*av, &end, 10); \
81 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
82 errx(EX_DATAERR, "%s: invalid argument: %s", \
83 match_value(s_x, tok), *av); \
85 if (errno == ERANGE || _xval < min || _xval > max) \
86 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
87 match_value(s_x, tok), min, max, *av); \
89 if (_xval == IP_FW_TABLEARG) \
90 errx(EX_DATAERR, "%s: illegal argument value: %s", \
91 match_value(s_x, tok), *av); \
97 PRINT_UINT_ARG(const char *str, uint32_t arg)
101 if (arg == IP_FW_TABLEARG)
107 static struct _s_x f_tcpflags[] = {
118 static struct _s_x f_tcpopts[] = {
119 { "mss", IP_FW_TCPOPT_MSS },
120 { "maxseg", IP_FW_TCPOPT_MSS },
121 { "window", IP_FW_TCPOPT_WINDOW },
122 { "sack", IP_FW_TCPOPT_SACK },
123 { "ts", IP_FW_TCPOPT_TS },
124 { "timestamp", IP_FW_TCPOPT_TS },
125 { "cc", IP_FW_TCPOPT_CC },
131 * IP options span the range 0 to 255 so we need to remap them
132 * (though in fact only the low 5 bits are significant).
134 static struct _s_x f_ipopts[] = {
135 { "ssrr", IP_FW_IPOPT_SSRR},
136 { "lsrr", IP_FW_IPOPT_LSRR},
137 { "rr", IP_FW_IPOPT_RR},
138 { "ts", IP_FW_IPOPT_TS},
143 static struct _s_x f_iptos[] = {
144 { "lowdelay", IPTOS_LOWDELAY},
145 { "throughput", IPTOS_THROUGHPUT},
146 { "reliability", IPTOS_RELIABILITY},
147 { "mincost", IPTOS_MINCOST},
148 { "congestion", IPTOS_ECN_CE},
149 { "ecntransport", IPTOS_ECN_ECT0},
150 { "ip tos option", 0},
154 static struct _s_x limit_masks[] = {
155 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
156 {"src-addr", DYN_SRC_ADDR},
157 {"src-port", DYN_SRC_PORT},
158 {"dst-addr", DYN_DST_ADDR},
159 {"dst-port", DYN_DST_PORT},
164 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
165 * This is only used in this code.
167 #define IPPROTO_ETHERTYPE 0x1000
168 static struct _s_x ether_types[] = {
170 * Note, we cannot use "-:&/" in the names because they are field
171 * separators in the type specifications. Also, we use s = NULL as
172 * end-delimiter, because a type of 0 can be legal.
185 { "pppoe_disc", 0x8863 },
186 { "pppoe_sess", 0x8864 },
187 { "ipx_8022", 0x00E0 },
188 { "ipx_8023", 0x0000 },
189 { "ipx_ii", 0x8137 },
190 { "ipx_snap", 0x8137 },
197 static struct _s_x rule_actions[] = {
198 { "accept", TOK_ACCEPT },
199 { "pass", TOK_ACCEPT },
200 { "allow", TOK_ACCEPT },
201 { "permit", TOK_ACCEPT },
202 { "count", TOK_COUNT },
203 { "pipe", TOK_PIPE },
204 { "queue", TOK_QUEUE },
205 { "divert", TOK_DIVERT },
207 { "netgraph", TOK_NETGRAPH },
208 { "ngtee", TOK_NGTEE },
209 { "fwd", TOK_FORWARD },
210 { "forward", TOK_FORWARD },
211 { "skipto", TOK_SKIPTO },
212 { "deny", TOK_DENY },
213 { "drop", TOK_DENY },
214 { "reject", TOK_REJECT },
215 { "reset6", TOK_RESET6 },
216 { "reset", TOK_RESET },
217 { "unreach6", TOK_UNREACH6 },
218 { "unreach", TOK_UNREACH },
219 { "check-state", TOK_CHECKSTATE },
220 { "//", TOK_COMMENT },
222 { "reass", TOK_REASS },
223 { "setfib", TOK_SETFIB },
224 { "call", TOK_CALL },
225 { "return", TOK_RETURN },
226 { NULL, 0 } /* terminator */
229 static struct _s_x rule_action_params[] = {
230 { "altq", TOK_ALTQ },
233 { "untag", TOK_UNTAG },
234 { NULL, 0 } /* terminator */
238 * The 'lookup' instruction accepts one of the following arguments.
239 * -1 is a terminator for the list.
240 * Arguments are passed as v[1] in O_DST_LOOKUP options.
242 static int lookup_key[] = {
243 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
244 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
246 static struct _s_x rule_options[] = {
247 { "tagged", TOK_TAGGED },
250 { "jail", TOK_JAIL },
252 { "limit", TOK_LIMIT },
253 { "keep-state", TOK_KEEPSTATE },
254 { "bridged", TOK_LAYER2 },
255 { "layer2", TOK_LAYER2 },
257 { "diverted", TOK_DIVERTED },
258 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
259 { "diverted-output", TOK_DIVERTEDOUTPUT },
260 { "xmit", TOK_XMIT },
261 { "recv", TOK_RECV },
263 { "fragment", TOK_FRAG },
264 { "frag", TOK_FRAG },
266 { "ipoptions", TOK_IPOPTS },
267 { "ipopts", TOK_IPOPTS },
268 { "iplen", TOK_IPLEN },
269 { "ipid", TOK_IPID },
270 { "ipprecedence", TOK_IPPRECEDENCE },
271 { "dscp", TOK_DSCP },
272 { "iptos", TOK_IPTOS },
273 { "ipttl", TOK_IPTTL },
274 { "ipversion", TOK_IPVER },
275 { "ipver", TOK_IPVER },
276 { "estab", TOK_ESTAB },
277 { "established", TOK_ESTAB },
278 { "setup", TOK_SETUP },
279 { "sockarg", TOK_SOCKARG },
280 { "tcpdatalen", TOK_TCPDATALEN },
281 { "tcpflags", TOK_TCPFLAGS },
282 { "tcpflgs", TOK_TCPFLAGS },
283 { "tcpoptions", TOK_TCPOPTS },
284 { "tcpopts", TOK_TCPOPTS },
285 { "tcpseq", TOK_TCPSEQ },
286 { "tcpack", TOK_TCPACK },
287 { "tcpwin", TOK_TCPWIN },
288 { "icmptype", TOK_ICMPTYPES },
289 { "icmptypes", TOK_ICMPTYPES },
290 { "dst-ip", TOK_DSTIP },
291 { "src-ip", TOK_SRCIP },
292 { "dst-port", TOK_DSTPORT },
293 { "src-port", TOK_SRCPORT },
294 { "proto", TOK_PROTO },
297 { "mac-type", TOK_MACTYPE },
298 { "verrevpath", TOK_VERREVPATH },
299 { "versrcreach", TOK_VERSRCREACH },
300 { "antispoof", TOK_ANTISPOOF },
301 { "ipsec", TOK_IPSEC },
302 { "icmp6type", TOK_ICMP6TYPES },
303 { "icmp6types", TOK_ICMP6TYPES },
304 { "ext6hdr", TOK_EXT6HDR},
305 { "flow-id", TOK_FLOWID},
310 { "dst-ipv6", TOK_DSTIP6},
311 { "dst-ip6", TOK_DSTIP6},
312 { "src-ipv6", TOK_SRCIP6},
313 { "src-ip6", TOK_SRCIP6},
314 { "lookup", TOK_LOOKUP},
315 { "//", TOK_COMMENT },
317 { "not", TOK_NOT }, /* pseudo option */
318 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
319 { "or", TOK_OR }, /* pseudo option */
320 { "|", /* escape */ TOK_OR }, /* pseudo option */
321 { "{", TOK_STARTBRACE }, /* pseudo option */
322 { "(", TOK_STARTBRACE }, /* pseudo option */
323 { "}", TOK_ENDBRACE }, /* pseudo option */
324 { ")", TOK_ENDBRACE }, /* pseudo option */
325 { NULL, 0 } /* terminator */
329 * Helper routine to print a possibly unaligned uint64_t on
330 * various platform. If width > 0, print the value with
331 * the desired width, followed by a space;
332 * otherwise, return the required width.
335 pr_u64(uint64_t *pd, int width)
338 #define U64_FMT "I64"
340 #define U64_FMT "llu"
343 unsigned long long d;
345 bcopy (pd, &u, sizeof(u));
348 printf("%*" U64_FMT " ", width, d) :
349 snprintf(NULL, 0, "%" U64_FMT, d) ;
354 safe_calloc(size_t number, size_t size)
356 void *ret = calloc(number, size);
359 err(EX_OSERR, "calloc");
364 safe_realloc(void *ptr, size_t size)
366 void *ret = realloc(ptr, size);
369 err(EX_OSERR, "realloc");
374 * conditionally runs the command.
375 * Selected options or negative -> getsockopt
378 do_cmd(int optname, void *optval, uintptr_t optlen)
385 if (ipfw_socket == -1)
386 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
388 err(EX_UNAVAILABLE, "socket");
390 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
391 optname == IP_FW_ADD || optname == IP_FW3 ||
392 optname == IP_FW_NAT_GET_CONFIG ||
394 optname == IP_FW_NAT_GET_LOG) {
397 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
398 (socklen_t *)optlen);
400 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
406 * do_setcmd3 - pass ipfw control cmd to kernel
407 * @optname: option name
408 * @optval: pointer to option data
409 * @optlen: option length
411 * Function encapsulates option value in IP_FW3 socket option
412 * and calls setsockopt().
413 * Function returns 0 on success or -1 otherwise.
416 do_setcmd3(int optname, void *optval, socklen_t optlen)
419 ip_fw3_opheader *op3;
424 if (ipfw_socket == -1)
425 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
427 err(EX_UNAVAILABLE, "socket");
429 len = sizeof(ip_fw3_opheader) + optlen;
431 /* Zero reserved fields */
432 memset(op3, 0, sizeof(ip_fw3_opheader));
433 memcpy(op3 + 1, optval, optlen);
434 op3->opcode = optname;
436 return setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, len);
440 * match_token takes a table and a string, returns the value associated
441 * with the string (-1 in case of failure).
444 match_token(struct _s_x *table, char *string)
447 uint i = strlen(string);
449 for (pt = table ; i && pt->s != NULL ; pt++)
450 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
456 * match_value takes a table and a value, returns the string associated
457 * with the value (NULL in case of failure).
460 match_value(struct _s_x *p, int value)
462 for (; p->s != NULL; p++)
469 * _substrcmp takes two strings and returns 1 if they do not match,
470 * and 0 if they match exactly or the first string is a sub-string
471 * of the second. A warning is printed to stderr in the case that the
472 * first string is a sub-string of the second.
474 * This function will be removed in the future through the usual
475 * deprecation process.
478 _substrcmp(const char *str1, const char* str2)
481 if (strncmp(str1, str2, strlen(str1)) != 0)
484 if (strlen(str1) != strlen(str2))
485 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
491 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
492 * and 0 if they match exactly or the second string is a sub-string
493 * of the first. A warning is printed to stderr in the case that the
494 * first string does not match the third.
496 * This function exists to warn about the bizzare construction
497 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
498 * for "bytes". The problem is that in addition to accepting "by",
499 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
500 * other string beginning with "by".
502 * This function will be removed in the future through the usual
503 * deprecation process.
506 _substrcmp2(const char *str1, const char* str2, const char* str3)
509 if (strncmp(str1, str2, strlen(str2)) != 0)
512 if (strcmp(str1, str3) != 0)
513 warnx("DEPRECATED: '%s' matched '%s'",
519 * prints one port, symbolic or numeric
522 print_port(int proto, uint16_t port)
525 if (proto == IPPROTO_ETHERTYPE) {
528 if (co.do_resolv && (s = match_value(ether_types, port)) )
531 printf("0x%04x", port);
533 struct servent *se = NULL;
535 struct protoent *pe = getprotobynumber(proto);
537 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
540 printf("%s", se->s_name);
546 static struct _s_x _port_name[] = {
547 {"dst-port", O_IP_DSTPORT},
548 {"src-port", O_IP_SRCPORT},
552 {"mac-type", O_MAC_TYPE},
553 {"tcpdatalen", O_TCPDATALEN},
554 {"tcpwin", O_TCPWIN},
555 {"tagged", O_TAGGED},
560 * Print the values in a list 16-bit items of the types above.
561 * XXX todo: add support for mask.
564 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
566 uint16_t *p = cmd->ports;
571 sep = match_value(_port_name, opcode);
577 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
579 print_port(proto, p[0]);
582 print_port(proto, p[1]);
589 * Like strtol, but also translates service names into port numbers
590 * for some protocols.
592 * proto == -1 disables the protocol check;
593 * proto == IPPROTO_ETHERTYPE looks up an internal table
594 * proto == <some value in /etc/protocols> matches the values there.
595 * Returns *end == s in case the parameter is not found.
598 strtoport(char *s, char **end, int base, int proto)
604 *end = s; /* default - not found */
606 return 0; /* not found */
609 return strtol(s, end, base);
612 * find separator. '\\' escapes the next char.
614 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
615 if (*s1 == '\\' && s1[1] != '\0')
618 buf = safe_calloc(s1 - s + 1, 1);
621 * copy into a buffer skipping backslashes
623 for (p = s, i = 0; p != s1 ; p++)
628 if (proto == IPPROTO_ETHERTYPE) {
629 i = match_token(ether_types, buf);
631 if (i != -1) { /* found */
636 struct protoent *pe = NULL;
640 pe = getprotobynumber(proto);
642 se = getservbyname(buf, pe ? pe->p_name : NULL);
646 return ntohs(se->s_port);
649 return 0; /* not found */
653 * Fill the body of the command with the list of port ranges.
656 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
658 uint16_t a, b, *p = cmd->ports;
663 a = strtoport(av, &s, 0, proto);
664 if (s == av) /* empty or invalid argument */
668 case '-': /* a range */
670 b = strtoport(av, &s, 0, proto);
671 /* Reject expressions like '1-abc' or '1-2-3'. */
672 if (s == av || (*s != ',' && *s != '\0'))
677 case ',': /* comma separated list */
682 warnx("port list: invalid separator <%c> in <%s>",
692 if (i + 1 > F_LEN_MASK)
693 errx(EX_DATAERR, "too many ports/ranges\n");
694 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
699 static struct _s_x icmpcodes[] = {
700 { "net", ICMP_UNREACH_NET },
701 { "host", ICMP_UNREACH_HOST },
702 { "protocol", ICMP_UNREACH_PROTOCOL },
703 { "port", ICMP_UNREACH_PORT },
704 { "needfrag", ICMP_UNREACH_NEEDFRAG },
705 { "srcfail", ICMP_UNREACH_SRCFAIL },
706 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
707 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
708 { "isolated", ICMP_UNREACH_ISOLATED },
709 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
710 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
711 { "tosnet", ICMP_UNREACH_TOSNET },
712 { "toshost", ICMP_UNREACH_TOSHOST },
713 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
714 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
715 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
720 fill_reject_code(u_short *codep, char *str)
725 val = strtoul(str, &s, 0);
726 if (s == str || *s != '\0' || val >= 0x100)
727 val = match_token(icmpcodes, str);
729 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
735 print_reject_code(uint16_t code)
737 char const *s = match_value(icmpcodes, code);
740 printf("unreach %s", s);
742 printf("unreach %u", code);
746 * Returns the number of bits set (from left) in a contiguous bitmask,
747 * or -1 if the mask is not contiguous.
748 * XXX this needs a proper fix.
749 * This effectively works on masks in big-endian (network) format.
750 * when compiled on little endian architectures.
752 * First bit is bit 7 of the first byte -- note, for MAC addresses,
753 * the first bit on the wire is bit 0 of the first byte.
754 * len is the max length in bits.
757 contigmask(uint8_t *p, int len)
761 for (i=0; i<len ; i++)
762 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
764 for (n=i+1; n < len; n++)
765 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
766 return -1; /* mask not contiguous */
771 * print flags set/clear in the two bitmasks passed as parameters.
772 * There is a specialized check for f_tcpflags.
775 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
777 char const *comma = "";
779 uint8_t set = cmd->arg1 & 0xff;
780 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
782 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
787 printf(" %s ", name);
788 for (i=0; list[i].x != 0; i++) {
789 if (set & list[i].x) {
791 printf("%s%s", comma, list[i].s);
794 if (clear & list[i].x) {
796 printf("%s!%s", comma, list[i].s);
803 * Print the ip address contained in a command.
806 print_ip(ipfw_insn_ip *cmd, char const *s)
808 struct hostent *he = NULL;
809 uint32_t len = F_LEN((ipfw_insn *)cmd);
810 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
812 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
814 const char *arg = "<invalid>";
816 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
817 arg = match_value(rule_options, lookup_key[d]);
818 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
822 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
824 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
828 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
829 cmd->o.opcode == O_IP_DST_LOOKUP) {
830 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
831 if (len == F_INSN_SIZE(ipfw_insn_u32))
836 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
837 uint32_t x, *map = (uint32_t *)&(cmd->mask);
843 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
844 printf("%s/%d", inet_ntoa(cmd->addr),
845 contigmask((uint8_t *)&x, 32));
846 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
847 x &= 0xff; /* base */
849 * Print bits and ranges.
850 * Locate first bit set (i), then locate first bit unset (j).
851 * If we have 3+ consecutive bits set, then print them as a
852 * range, otherwise only print the initial bit and rescan.
854 for (i=0; i < cmd->o.arg1; i++)
855 if (map[i/32] & (1<<(i & 31))) {
856 for (j=i+1; j < cmd->o.arg1; j++)
857 if (!(map[ j/32] & (1<<(j & 31))))
859 printf("%c%d", comma, i+x);
860 if (j>i+2) { /* range has at least 3 elements */
861 printf("-%d", j-1+x);
870 * len == 2 indicates a single IP, whereas lists of 1 or more
871 * addr/mask pairs have len = (2n+1). We convert len to n so we
872 * use that to count the number of entries.
874 for (len = len / 2; len > 0; len--, a += 2) {
875 int mb = /* mask length */
876 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
877 32 : contigmask((uint8_t *)&(a[1]), 32);
878 if (mb == 32 && co.do_resolv)
879 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
880 if (he != NULL) /* resolved to name */
881 printf("%s", he->h_name);
882 else if (mb == 0) /* any */
884 else { /* numeric IP followed by some kind of mask */
885 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
887 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
897 * prints a MAC address/mask pair
900 print_mac(uint8_t *addr, uint8_t *mask)
902 int l = contigmask(mask, 48);
907 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
908 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
910 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
911 mask[0], mask[1], mask[2],
912 mask[3], mask[4], mask[5]);
919 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
928 type = strtoul(av, &av, 0);
930 if (*av != ',' && *av != '\0')
931 errx(EX_DATAERR, "invalid ICMP type");
934 errx(EX_DATAERR, "ICMP type out of range");
936 cmd->d[0] |= 1 << type;
938 cmd->o.opcode = O_ICMPTYPE;
939 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
943 print_icmptypes(ipfw_insn_u32 *cmd)
948 printf(" icmptypes");
949 for (i = 0; i < 32; i++) {
950 if ( (cmd->d[0] & (1 << (i))) == 0)
952 printf("%c%d", sep, i);
958 * show_ipfw() prints the body of an ipfw rule.
959 * Because the standard rule has at least proto src_ip dst_ip, we use
960 * a helper function to produce these entries if not provided explicitly.
961 * The first argument is the list of fields we have, the second is
962 * the list of fields we want to be printed.
964 * Special cases if we have provided a MAC header:
965 * + if the rule does not contain IP addresses/ports, do not print them;
966 * + if the rule does not contain an IP proto, print "all" instead of "ip";
968 * Once we have 'have_options', IP header fields are printed as options.
970 #define HAVE_PROTO 0x0001
971 #define HAVE_SRCIP 0x0002
972 #define HAVE_DSTIP 0x0004
973 #define HAVE_PROTO4 0x0008
974 #define HAVE_PROTO6 0x0010
975 #define HAVE_IP 0x0100
976 #define HAVE_OPTIONS 0x8000
979 show_prerequisites(int *flags, int want, int cmd __unused)
983 if ( (*flags & HAVE_IP) == HAVE_IP)
984 *flags |= HAVE_OPTIONS;
986 if ( !(*flags & HAVE_OPTIONS)) {
987 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
988 if ( (*flags & HAVE_PROTO4))
990 else if ( (*flags & HAVE_PROTO6))
995 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
997 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1004 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1006 static int twidth = 0;
1008 ipfw_insn *cmd, *tagptr = NULL;
1009 const char *comment = NULL; /* ptr to comment if we have one */
1010 int proto = 0; /* default */
1011 int flags = 0; /* prerequisites */
1012 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1013 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1014 int or_block = 0; /* we are in an or block */
1015 uint32_t set_disable;
1017 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1019 if (set_disable & (1 << rule->set)) { /* disabled */
1023 printf("# DISABLED ");
1025 printf("%05u ", rule->rulenum);
1027 if (pcwidth > 0 || bcwidth > 0) {
1028 pr_u64(&rule->pcnt, pcwidth);
1029 pr_u64(&rule->bcnt, bcwidth);
1032 if (co.do_time == 2)
1033 printf("%10u ", rule->timestamp);
1034 else if (co.do_time == 1) {
1036 time_t t = (time_t)0;
1039 strcpy(timestr, ctime(&t));
1040 *strchr(timestr, '\n') = '\0';
1041 twidth = strlen(timestr);
1043 if (rule->timestamp) {
1044 t = _long_to_time(rule->timestamp);
1046 strcpy(timestr, ctime(&t));
1047 *strchr(timestr, '\n') = '\0';
1048 printf("%s ", timestr);
1050 printf("%*s", twidth, " ");
1055 printf("set %d ", rule->set);
1058 * print the optional "match probability"
1060 if (rule->cmd_len > 0) {
1062 if (cmd->opcode == O_PROB) {
1063 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1064 double d = 1.0 * p->d[0];
1066 d = (d / 0x7fffffff);
1067 printf("prob %f ", d);
1072 * first print actions
1074 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1075 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1076 switch(cmd->opcode) {
1078 printf("check-state");
1079 /* avoid printing anything else */
1080 flags = HAVE_PROTO | HAVE_SRCIP |
1081 HAVE_DSTIP | HAVE_IP;
1097 if (cmd->arg1 == ICMP_REJECT_RST)
1099 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1102 print_reject_code(cmd->arg1);
1106 if (cmd->arg1 == ICMP6_UNREACH_RST)
1109 print_unreach6_code(cmd->arg1);
1113 PRINT_UINT_ARG("skipto ", cmd->arg1);
1117 PRINT_UINT_ARG("pipe ", cmd->arg1);
1121 PRINT_UINT_ARG("queue ", cmd->arg1);
1125 PRINT_UINT_ARG("divert ", cmd->arg1);
1129 PRINT_UINT_ARG("tee ", cmd->arg1);
1133 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1137 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1142 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1144 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1145 printf("fwd tablearg");
1147 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1150 printf(",%d", s->sa.sin_port);
1156 char buf[4 + INET6_ADDRSTRLEN + 1];
1157 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1159 printf("fwd %s", inet_ntop(AF_INET6, &s->sa.sin6_addr,
1161 if (s->sa.sin6_port)
1162 printf(",%d", s->sa.sin6_port);
1166 case O_LOG: /* O_LOG is printed last */
1167 logptr = (ipfw_insn_log *)cmd;
1170 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1171 altqptr = (ipfw_insn_altq *)cmd;
1180 PRINT_UINT_ARG("nat ", cmd->arg1);
1182 printf("nat global");
1186 PRINT_UINT_ARG("setfib ", cmd->arg1);
1194 if (cmd->len & F_NOT)
1197 PRINT_UINT_ARG("call ", cmd->arg1);
1201 printf("** unrecognized action %d len %d ",
1202 cmd->opcode, cmd->len);
1206 if (logptr->max_log > 0)
1207 printf(" log logamount %d", logptr->max_log);
1213 print_altq_cmd(altqptr);
1217 if (tagptr->len & F_NOT)
1218 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1220 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1224 * then print the body.
1226 for (l = rule->act_ofs, cmd = rule->cmd ;
1227 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1228 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1230 if (cmd->opcode == O_IP4) {
1231 flags |= HAVE_PROTO4;
1233 } else if (cmd->opcode == O_IP6) {
1234 flags |= HAVE_PROTO6;
1238 if (rule->_pad & 1) { /* empty rules before options */
1239 if (!co.do_compact) {
1240 show_prerequisites(&flags, HAVE_PROTO, 0);
1241 printf(" from any to any");
1243 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1244 HAVE_SRCIP | HAVE_DSTIP;
1247 if (co.comment_only)
1250 for (l = rule->act_ofs, cmd = rule->cmd ;
1251 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1253 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1255 if (co.comment_only) {
1256 if (cmd->opcode != O_NOP)
1258 printf(" // %s\n", (char *)(cmd + 1));
1262 show_prerequisites(&flags, 0, cmd->opcode);
1264 switch(cmd->opcode) {
1266 break; /* done already */
1269 break; /* no need to print anything here */
1272 case O_IP_SRC_LOOKUP:
1276 show_prerequisites(&flags, HAVE_PROTO, 0);
1277 if (!(flags & HAVE_SRCIP))
1279 if ((cmd->len & F_OR) && !or_block)
1281 print_ip((ipfw_insn_ip *)cmd,
1282 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1283 flags |= HAVE_SRCIP;
1287 case O_IP_DST_LOOKUP:
1291 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1292 if (!(flags & HAVE_DSTIP))
1294 if ((cmd->len & F_OR) && !or_block)
1296 print_ip((ipfw_insn_ip *)cmd,
1297 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1298 flags |= HAVE_DSTIP;
1302 case O_IP6_SRC_MASK:
1304 show_prerequisites(&flags, HAVE_PROTO, 0);
1305 if (!(flags & HAVE_SRCIP))
1307 if ((cmd->len & F_OR) && !or_block)
1309 print_ip6((ipfw_insn_ip6 *)cmd,
1310 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1311 flags |= HAVE_SRCIP | HAVE_PROTO;
1315 case O_IP6_DST_MASK:
1317 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1318 if (!(flags & HAVE_DSTIP))
1320 if ((cmd->len & F_OR) && !or_block)
1322 print_ip6((ipfw_insn_ip6 *)cmd,
1323 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1324 flags |= HAVE_DSTIP;
1328 print_flow6id( (ipfw_insn_u32 *) cmd );
1329 flags |= HAVE_OPTIONS;
1333 show_prerequisites(&flags,
1334 HAVE_PROTO | HAVE_SRCIP |
1335 HAVE_DSTIP | HAVE_IP, 0);
1337 if (flags & HAVE_DSTIP)
1339 show_prerequisites(&flags,
1340 HAVE_PROTO | HAVE_SRCIP, 0);
1341 if ((cmd->len & F_OR) && !or_block)
1343 if (cmd->len & F_NOT)
1345 print_newports((ipfw_insn_u16 *)cmd, proto,
1346 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1350 struct protoent *pe = NULL;
1352 if ((cmd->len & F_OR) && !or_block)
1354 if (cmd->len & F_NOT)
1357 pe = getprotobynumber(cmd->arg1);
1358 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1359 !(flags & HAVE_PROTO))
1360 show_prerequisites(&flags,
1361 HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1362 HAVE_DSTIP | HAVE_OPTIONS, 0);
1363 if (flags & HAVE_OPTIONS)
1366 printf(" %s", pe->p_name);
1368 printf(" %u", cmd->arg1);
1370 flags |= HAVE_PROTO;
1373 default: /*options ... */
1374 if (!(cmd->len & (F_OR|F_NOT)))
1375 if (((cmd->opcode == O_IP6) &&
1376 (flags & HAVE_PROTO6)) ||
1377 ((cmd->opcode == O_IP4) &&
1378 (flags & HAVE_PROTO4)))
1380 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP |
1381 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1382 if ((cmd->len & F_OR) && !or_block)
1384 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1386 switch(cmd->opcode) {
1388 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1391 print_mac(m->addr, m->mask);
1392 print_mac(m->addr + 6, m->mask + 6);
1397 print_newports((ipfw_insn_u16 *)cmd,
1398 IPPROTO_ETHERTYPE, cmd->opcode);
1407 printf(" fib %u", cmd->arg1 );
1414 printf(cmd->len & F_NOT ? " out" : " in");
1418 switch (cmd->arg1) {
1420 printf(" diverted");
1423 printf(" diverted-loopback");
1426 printf(" diverted-output");
1429 printf(" diverted-?<%u>", cmd->arg1);
1442 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1444 if (cmd->opcode == O_XMIT)
1446 else if (cmd->opcode == O_RECV)
1448 else /* if (cmd->opcode == O_VIA) */
1450 if (cmdif->name[0] == '\0')
1452 inet_ntoa(cmdif->p.ip));
1453 else if (cmdif->name[0] == '\1') /* interface table */
1454 printf(" %s table(%d)", s, cmdif->p.glob);
1456 printf(" %s %s", s, cmdif->name);
1461 if (F_LEN(cmd) == 1)
1462 printf(" ipid %u", cmd->arg1 );
1464 print_newports((ipfw_insn_u16 *)cmd, 0,
1469 if (F_LEN(cmd) == 1)
1470 printf(" ipttl %u", cmd->arg1 );
1472 print_newports((ipfw_insn_u16 *)cmd, 0,
1477 printf(" ipver %u", cmd->arg1 );
1480 case O_IPPRECEDENCE:
1481 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1485 if (F_LEN(cmd) == 1)
1486 printf(" iplen %u", cmd->arg1 );
1488 print_newports((ipfw_insn_u16 *)cmd, 0,
1493 print_flags("ipoptions", cmd, f_ipopts);
1497 print_flags("iptos", cmd, f_iptos);
1501 print_icmptypes((ipfw_insn_u32 *)cmd);
1505 printf(" established");
1509 if (F_LEN(cmd) == 1)
1510 printf(" tcpdatalen %u", cmd->arg1 );
1512 print_newports((ipfw_insn_u16 *)cmd, 0,
1517 print_flags("tcpflags", cmd, f_tcpflags);
1521 print_flags("tcpoptions", cmd, f_tcpopts);
1525 if (F_LEN(cmd) == 1)
1526 printf(" tcpwin %u", cmd->arg1);
1528 print_newports((ipfw_insn_u16 *)cmd, 0,
1533 printf(" tcpack %d", ntohl(cmd32->d[0]));
1537 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1542 struct passwd *pwd = getpwuid(cmd32->d[0]);
1545 printf(" uid %s", pwd->pw_name);
1547 printf(" uid %u", cmd32->d[0]);
1553 struct group *grp = getgrgid(cmd32->d[0]);
1556 printf(" gid %s", grp->gr_name);
1558 printf(" gid %u", cmd32->d[0]);
1563 printf(" jail %d", cmd32->d[0]);
1567 printf(" verrevpath");
1571 printf(" versrcreach");
1575 printf(" antispoof");
1583 comment = (char *)(cmd + 1);
1587 printf(" keep-state");
1591 struct _s_x *p = limit_masks;
1592 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1593 uint8_t x = c->limit_mask;
1594 char const *comma = " ";
1597 for (; p->x != 0 ; p++)
1598 if ((x & p->x) == p->x) {
1600 printf("%s%s", comma, p->s);
1603 PRINT_UINT_ARG(" ", c->conn_limit);
1616 print_icmp6types((ipfw_insn_u32 *)cmd);
1620 print_ext6hdr( (ipfw_insn *) cmd );
1624 if (F_LEN(cmd) == 1)
1625 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1627 print_newports((ipfw_insn_u16 *)cmd, 0,
1632 printf(" [opcode %d len %d]",
1633 cmd->opcode, cmd->len);
1636 if (cmd->len & F_OR) {
1639 } else if (or_block) {
1644 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
1647 printf(" // %s", comment);
1652 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1654 struct protoent *pe;
1657 char buf[INET6_ADDRSTRLEN];
1659 if (!co.do_expired) {
1660 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1663 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1664 printf("%05d", rulenum);
1665 if (pcwidth > 0 || bcwidth > 0) {
1667 pr_u64(&d->pcnt, pcwidth);
1668 pr_u64(&d->bcnt, bcwidth);
1669 printf("(%ds)", d->expire);
1671 switch (d->dyn_type) {
1672 case O_LIMIT_PARENT:
1673 printf(" PARENT %d", d->count);
1678 case O_KEEP_STATE: /* bidir, no mask */
1683 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1684 printf(" %s", pe->p_name);
1686 printf(" proto %u", d->id.proto);
1688 if (d->id.addr_type == 4) {
1689 a.s_addr = htonl(d->id.src_ip);
1690 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1692 a.s_addr = htonl(d->id.dst_ip);
1693 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1694 } else if (d->id.addr_type == 6) {
1695 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1696 sizeof(buf)), d->id.src_port);
1697 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1698 sizeof(buf)), d->id.dst_port);
1700 printf(" UNKNOWN <-> UNKNOWN\n");
1706 * This one handles all set-related commands
1707 * ipfw set { show | enable | disable }
1709 * ipfw set move X to Y
1710 * ipfw set move rule X to Y
1713 ipfw_sets_handler(char *av[])
1715 uint32_t set_disable, masks[2];
1718 uint8_t cmd, new_set;
1723 errx(EX_USAGE, "set needs command");
1724 if (_substrcmp(*av, "show") == 0) {
1729 nalloc = nbytes = sizeof(struct ip_fw);
1730 while (nbytes >= nalloc) {
1733 nalloc = nalloc * 2 + 200;
1735 data = safe_calloc(1, nbytes);
1736 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1737 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1740 bcopy(&((struct ip_fw *)data)->next_rule,
1741 &set_disable, sizeof(set_disable));
1743 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1744 if ((set_disable & (1<<i))) {
1745 printf("%s %d", msg, i);
1748 msg = (set_disable) ? " enable" : "enable";
1749 for (i = 0; i < RESVD_SET; i++)
1750 if (!(set_disable & (1<<i))) {
1751 printf("%s %d", msg, i);
1755 } else if (_substrcmp(*av, "swap") == 0) {
1757 if ( av[0] == NULL || av[1] == NULL )
1758 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1759 rulenum = atoi(av[0]);
1760 new_set = atoi(av[1]);
1761 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1762 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1763 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1764 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1765 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1766 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1767 } else if (_substrcmp(*av, "move") == 0) {
1769 if (av[0] && _substrcmp(*av, "rule") == 0) {
1774 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1775 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1776 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1777 rulenum = atoi(av[0]);
1778 new_set = atoi(av[2]);
1779 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1780 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1781 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1782 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1783 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1784 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1785 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1786 } else if (_substrcmp(*av, "disable") == 0 ||
1787 _substrcmp(*av, "enable") == 0 ) {
1788 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1791 masks[0] = masks[1] = 0;
1794 if (isdigit(**av)) {
1796 if (i < 0 || i > RESVD_SET)
1798 "invalid set number %d\n", i);
1799 masks[which] |= (1<<i);
1800 } else if (_substrcmp(*av, "disable") == 0)
1802 else if (_substrcmp(*av, "enable") == 0)
1806 "invalid set command %s\n", *av);
1809 if ( (masks[0] & masks[1]) != 0 )
1811 "cannot enable and disable the same set\n");
1813 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1815 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1817 errx(EX_USAGE, "invalid set command %s\n", *av);
1821 ipfw_sysctl_handler(char *av[], int which)
1825 if (av[0] == NULL) {
1826 warnx("missing keyword to enable/disable\n");
1827 } else if (_substrcmp(*av, "firewall") == 0) {
1828 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1829 &which, sizeof(which));
1830 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
1831 &which, sizeof(which));
1832 } else if (_substrcmp(*av, "one_pass") == 0) {
1833 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1834 &which, sizeof(which));
1835 } else if (_substrcmp(*av, "debug") == 0) {
1836 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1837 &which, sizeof(which));
1838 } else if (_substrcmp(*av, "verbose") == 0) {
1839 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1840 &which, sizeof(which));
1841 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1842 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1843 &which, sizeof(which));
1845 } else if (_substrcmp(*av, "altq") == 0) {
1846 altq_set_enabled(which);
1849 warnx("unrecognize enable/disable keyword: %s\n", *av);
1854 ipfw_list(int ac, char *av[], int show_counters)
1857 ipfw_dyn_rule *dynrules, *d;
1859 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1862 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1863 int exitval = EX_OK;
1871 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1872 int nalloc = 1024; /* start somewhere... */
1877 fprintf(stderr, "Testing only, list disabled\n");
1881 dummynet_list(ac, av, show_counters);
1888 /* get rules or pipes from kernel, resizing array as necessary */
1891 while (nbytes >= nalloc) {
1892 nalloc = nalloc * 2 + 200;
1894 data = safe_realloc(data, nbytes);
1895 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1896 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1897 co.do_pipe ? "DUMMYNET" : "FW");
1901 * Count static rules. They have variable size so we
1902 * need to scan the list to count them.
1904 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1905 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1906 ++nstat, r = NEXT(r) )
1910 * Count dynamic rules. This is easier as they have
1914 dynrules = (ipfw_dyn_rule *)r ;
1915 n = (char *)r - (char *)data;
1916 ndyn = (nbytes - n) / sizeof *dynrules;
1918 /* if showing stats, figure out column widths ahead of time */
1919 bcwidth = pcwidth = 0;
1920 if (show_counters) {
1921 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1922 /* skip rules from another set */
1923 if (co.use_set && r->set != co.use_set - 1)
1926 /* packet counter */
1927 width = pr_u64(&r->pcnt, 0);
1928 if (width > pcwidth)
1932 width = pr_u64(&r->bcnt, 0);
1933 if (width > bcwidth)
1937 if (co.do_dynamic && ndyn) {
1938 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1940 /* skip rules from another set */
1941 bcopy((char *)&d->rule + sizeof(uint16_t),
1942 &set, sizeof(uint8_t));
1943 if (set != co.use_set - 1)
1946 width = pr_u64(&d->pcnt, 0);
1947 if (width > pcwidth)
1950 width = pr_u64(&d->bcnt, 0);
1951 if (width > bcwidth)
1955 /* if no rule numbers were specified, list all rules */
1957 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1958 if (co.use_set && r->set != co.use_set - 1)
1960 show_ipfw(r, pcwidth, bcwidth);
1963 if (co.do_dynamic && ndyn) {
1964 printf("## Dynamic rules (%d):\n", ndyn);
1965 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1967 bcopy((char *)&d->rule + sizeof(uint16_t),
1968 &set, sizeof(uint8_t));
1969 if (set != co.use_set - 1)
1972 show_dyn_ipfw(d, pcwidth, bcwidth);
1978 /* display specific rules requested on command line */
1980 for (lac = ac, lav = av; lac != 0; lac--) {
1981 /* convert command line rule # */
1982 last = rnum = strtoul(*lav++, &endptr, 10);
1984 last = strtoul(endptr+1, &endptr, 10);
1987 warnx("invalid rule number: %s", *(lav - 1));
1990 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1991 if (r->rulenum > last)
1993 if (co.use_set && r->set != co.use_set - 1)
1995 if (r->rulenum >= rnum && r->rulenum <= last) {
1996 show_ipfw(r, pcwidth, bcwidth);
2001 /* give precedence to other error(s) */
2002 if (exitval == EX_OK)
2003 exitval = EX_UNAVAILABLE;
2004 warnx("rule %lu does not exist", rnum);
2008 if (co.do_dynamic && ndyn) {
2009 printf("## Dynamic rules:\n");
2010 for (lac = ac, lav = av; lac != 0; lac--) {
2011 last = rnum = strtoul(*lav++, &endptr, 10);
2013 last = strtoul(endptr+1, &endptr, 10);
2015 /* already warned */
2017 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2020 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2024 bcopy((char *)&d->rule + sizeof(uint16_t),
2025 &set, sizeof(uint8_t));
2026 if (set != co.use_set - 1)
2029 if (r->rulenum >= rnum && r->rulenum <= last)
2030 show_dyn_ipfw(d, pcwidth, bcwidth);
2040 if (exitval != EX_OK)
2046 lookup_host (char *host, struct in_addr *ipaddr)
2050 if (!inet_aton(host, ipaddr)) {
2051 if ((he = gethostbyname(host)) == NULL)
2053 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2059 * fills the addr and mask fields in the instruction as appropriate from av.
2060 * Update length as appropriate.
2061 * The following formats are allowed:
2062 * me returns O_IP_*_ME
2063 * 1.2.3.4 single IP address
2064 * 1.2.3.4:5.6.7.8 address:mask
2065 * 1.2.3.4/24 address/mask
2066 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
2067 * We can have multiple comma-separated address/mask entries.
2070 fill_ip(ipfw_insn_ip *cmd, char *av)
2073 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2075 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2077 if (_substrcmp(av, "any") == 0)
2080 if (_substrcmp(av, "me") == 0) {
2081 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2085 if (strncmp(av, "table(", 6) == 0) {
2086 char *p = strchr(av + 6, ',');
2090 cmd->o.opcode = O_IP_DST_LOOKUP;
2091 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2093 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2094 d[0] = strtoul(p, NULL, 0);
2096 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2102 * After the address we can have '/' or ':' indicating a mask,
2103 * ',' indicating another address follows, '{' indicating a
2104 * set of addresses of unspecified size.
2106 char *t = NULL, *p = strpbrk(av, "/:,{");
2113 if ((t = strpbrk(p, ",{")) != NULL) {
2120 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2121 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2124 if (!inet_aton(p, (struct in_addr *)&d[1]))
2125 errx(EX_DATAERR, "bad netmask ``%s''", p);
2130 d[1] = htonl(0); /* mask */
2131 else if (masklen > 32)
2132 errx(EX_DATAERR, "bad width ``%s''", p);
2134 d[1] = htonl(~0 << (32 - masklen));
2136 case '{': /* no mask, assume /24 and put back the '{' */
2137 d[1] = htonl(~0 << (32 - 24));
2141 case ',': /* single address plus continuation */
2144 case 0: /* initialization value */
2146 d[1] = htonl(~0); /* force /32 */
2149 d[0] &= d[1]; /* mask base address with mask */
2152 /* find next separator */
2154 p = strpbrk(p, ",{");
2155 if (p && *p == '{') {
2157 * We have a set of addresses. They are stored as follows:
2158 * arg1 is the set size (powers of 2, 2..256)
2159 * addr is the base address IN HOST FORMAT
2160 * mask.. is an array of arg1 bits (rounded up to
2161 * the next multiple of 32) with bits set
2162 * for each host in the map.
2164 uint32_t *map = (uint32_t *)&cmd->mask;
2166 int i = contigmask((uint8_t *)&(d[1]), 32);
2169 errx(EX_DATAERR, "address set cannot be in a list");
2170 if (i < 24 || i > 31)
2171 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2172 cmd->o.arg1 = 1<<(32-i); /* map length */
2173 d[0] = ntohl(d[0]); /* base addr in host format */
2174 cmd->o.opcode = O_IP_DST_SET; /* default */
2175 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2176 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2177 map[i] = 0; /* clear map */
2181 high = low + cmd->o.arg1 - 1;
2183 * Here, i stores the previous value when we specify a range
2184 * of addresses within a mask, e.g. 45-63. i = -1 means we
2185 * have no previous value.
2187 i = -1; /* previous value in a range */
2188 while (isdigit(*av)) {
2190 int a = strtol(av, &s, 0);
2192 if (s == av) { /* no parameter */
2194 errx(EX_DATAERR, "set not closed\n");
2196 errx(EX_DATAERR, "incomplete range %d-", i);
2199 if (a < low || a > high)
2200 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2203 if (i == -1) /* no previous in range */
2205 else { /* check that range is valid */
2207 errx(EX_DATAERR, "invalid range %d-%d",
2210 errx(EX_DATAERR, "double '-' in range");
2213 map[i/32] |= 1<<(i & 31);
2224 if (av) /* then *av must be a ',' */
2227 /* Check this entry */
2228 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2230 * 'any' turns the entire list into a NOP.
2231 * 'not any' never matches, so it is removed from the
2232 * list unless it is the only item, in which case we
2235 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2236 if (av == NULL && len == 0) /* only this entry */
2237 errx(EX_DATAERR, "not any never matches");
2239 /* else do nothing and skip this entry */
2242 /* A single IP can be stored in an optimized format */
2243 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2244 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2247 len += 2; /* two words... */
2250 if (len + 1 > F_LEN_MASK)
2251 errx(EX_DATAERR, "address list too long");
2252 cmd->o.len |= len+1;
2256 /* n2mask sets n bits of the mask */
2258 n2mask(struct in6_addr *mask, int n)
2260 static int minimask[9] =
2261 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2264 memset(mask, 0, sizeof(struct in6_addr));
2265 p = (u_char *) mask;
2266 for (; n > 0; p++, n -= 8) {
2276 * helper function to process a set of flags and set bits in the
2277 * appropriate masks.
2280 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2281 struct _s_x *flags, char *p)
2283 uint8_t set=0, clear=0;
2286 char *q; /* points to the separator */
2288 uint8_t *which; /* mask we are working on */
2298 val = match_token(flags, p);
2300 errx(EX_DATAERR, "invalid flag %s", p);
2301 *which |= (uint8_t)val;
2304 cmd->opcode = opcode;
2305 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2306 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2311 ipfw_delete(char *av[])
2315 int exitval = EX_OK;
2319 NEED1("missing rule specification");
2320 if ( *av && _substrcmp(*av, "set") == 0) {
2321 /* Do not allow using the following syntax:
2322 * ipfw set N delete set M
2325 errx(EX_DATAERR, "invalid syntax");
2326 do_set = 1; /* delete set */
2331 while (*av && isdigit(**av)) {
2332 i = atoi(*av); av++;
2334 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2336 exitval = EX_UNAVAILABLE;
2337 warn("rule %u not available", i);
2339 } else if (co.do_pipe) {
2340 exitval = ipfw_delete_pipe(co.do_pipe, i);
2343 rulenum = (i & 0xffff) | (5 << 24) |
2344 ((co.use_set - 1) << 16);
2346 rulenum = (i & 0xffff) | (do_set << 24);
2347 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2349 exitval = EX_UNAVAILABLE;
2350 warn("rule %u: setsockopt(IP_FW_DEL)",
2355 if (exitval != EX_OK)
2361 * fill the interface structure. We do not check the name as we can
2362 * create interfaces dynamically, so checking them at insert time
2363 * makes relatively little sense.
2364 * Interface names containing '*', '?', or '[' are assumed to be shell
2365 * patterns which match interfaces.
2368 fill_iface(ipfw_insn_if *cmd, char *arg)
2370 cmd->name[0] = '\0';
2371 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2373 /* Parse the interface or address */
2374 if (strcmp(arg, "any") == 0)
2375 cmd->o.len = 0; /* effectively ignore this command */
2376 else if (strncmp(arg, "table(", 6) == 0) {
2377 char *p = strchr(arg + 6, ',');
2380 cmd->name[0] = '\1'; /* Special value indicating table */
2381 cmd->p.glob = strtoul(arg + 6, NULL, 0);
2382 } else if (!isdigit(*arg)) {
2383 strlcpy(cmd->name, arg, sizeof(cmd->name));
2384 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2385 } else if (!inet_aton(arg, &cmd->p.ip))
2386 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2390 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2394 char *ap, *ptr, *optr;
2395 struct ether_addr *mac;
2396 const char *macset = "0123456789abcdefABCDEF:";
2398 if (strcmp(p, "any") == 0) {
2399 for (i = 0; i < ETHER_ADDR_LEN; i++)
2400 addr[i] = mask[i] = 0;
2404 optr = ptr = strdup(p);
2405 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2407 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2408 errx(EX_DATAERR, "Incorrect MAC address");
2409 bcopy(mac, addr, ETHER_ADDR_LEN);
2411 errx(EX_DATAERR, "Incorrect MAC address");
2413 if (ptr != NULL) { /* we have mask? */
2414 if (p[ptr - optr - 1] == '/') { /* mask len */
2415 long ml = strtol(ptr, &ap, 10);
2416 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2417 errx(EX_DATAERR, "Incorrect mask length");
2418 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2419 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2422 if (strspn(ptr, macset) != l ||
2423 (mac = ether_aton(ptr)) == NULL)
2424 errx(EX_DATAERR, "Incorrect mask");
2425 bcopy(mac, mask, ETHER_ADDR_LEN);
2427 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2428 for (i = 0; i < ETHER_ADDR_LEN; i++)
2431 for (i = 0; i < ETHER_ADDR_LEN; i++)
2438 * helper function, updates the pointer to cmd with the length
2439 * of the current command, and also cleans up the first word of
2440 * the new command in case it has been clobbered before.
2443 next_cmd(ipfw_insn *cmd)
2446 bzero(cmd, sizeof(*cmd));
2451 * Takes arguments and copies them into a comment
2454 fill_comment(ipfw_insn *cmd, char **av)
2457 char *p = (char *)(cmd + 1);
2459 cmd->opcode = O_NOP;
2460 cmd->len = (cmd->len & (F_NOT | F_OR));
2462 /* Compute length of comment string. */
2463 for (i = 0, l = 0; av[i] != NULL; i++)
2464 l += strlen(av[i]) + 1;
2469 "comment too long (max 80 chars)");
2471 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2472 for (i = 0; av[i] != NULL; i++) {
2481 * A function to fill simple commands of size 1.
2482 * Existing flags are preserved.
2485 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2487 cmd->opcode = opcode;
2488 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2493 * Fetch and add the MAC address and type, with masks. This generates one or
2494 * two microinstructions, and returns the pointer to the last one.
2497 add_mac(ipfw_insn *cmd, char *av[])
2501 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2502 errx(EX_DATAERR, "MAC dst src");
2504 cmd->opcode = O_MACADDR2;
2505 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2507 mac = (ipfw_insn_mac *)cmd;
2508 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2509 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2510 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2515 add_mactype(ipfw_insn *cmd, char *av)
2518 errx(EX_DATAERR, "missing MAC type");
2519 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2520 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2521 cmd->opcode = O_MAC_TYPE;
2528 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2530 struct protoent *pe;
2534 proto = strtol(av, &ep, 10);
2535 if (*ep != '\0' || proto <= 0) {
2536 if ((pe = getprotobyname(av)) == NULL)
2538 proto = pe->p_proto;
2541 fill_cmd(cmd, O_PROTO, 0, proto);
2547 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2549 u_char proto = IPPROTO_IP;
2551 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2552 ; /* do not set O_IP4 nor O_IP6 */
2553 else if (strcmp(av, "ip4") == 0)
2554 /* explicit "just IPv4" rule */
2555 fill_cmd(cmd, O_IP4, 0, 0);
2556 else if (strcmp(av, "ip6") == 0) {
2557 /* explicit "just IPv6" rule */
2558 proto = IPPROTO_IPV6;
2559 fill_cmd(cmd, O_IP6, 0, 0);
2561 return add_proto0(cmd, av, protop);
2568 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2570 u_char proto = IPPROTO_IP;
2572 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2573 ; /* do not set O_IP4 nor O_IP6 */
2574 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2575 /* explicit "just IPv4" rule */
2576 fill_cmd(cmd, O_IP4, 0, 0);
2577 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2578 /* explicit "just IPv6" rule */
2579 proto = IPPROTO_IPV6;
2580 fill_cmd(cmd, O_IP6, 0, 0);
2582 return add_proto0(cmd, av, protop);
2589 add_srcip(ipfw_insn *cmd, char *av)
2591 fill_ip((ipfw_insn_ip *)cmd, av);
2592 if (cmd->opcode == O_IP_DST_SET) /* set */
2593 cmd->opcode = O_IP_SRC_SET;
2594 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2595 cmd->opcode = O_IP_SRC_LOOKUP;
2596 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2597 cmd->opcode = O_IP_SRC_ME;
2598 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2599 cmd->opcode = O_IP_SRC;
2600 else /* addr/mask */
2601 cmd->opcode = O_IP_SRC_MASK;
2606 add_dstip(ipfw_insn *cmd, char *av)
2608 fill_ip((ipfw_insn_ip *)cmd, av);
2609 if (cmd->opcode == O_IP_DST_SET) /* set */
2611 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2613 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2614 cmd->opcode = O_IP_DST_ME;
2615 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2616 cmd->opcode = O_IP_DST;
2617 else /* addr/mask */
2618 cmd->opcode = O_IP_DST_MASK;
2623 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2625 /* XXX "any" is trapped before. Perhaps "to" */
2626 if (_substrcmp(av, "any") == 0) {
2628 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2629 /* XXX todo: check that we have a protocol with ports */
2630 cmd->opcode = opcode;
2637 add_src(ipfw_insn *cmd, char *av, u_char proto)
2641 ipfw_insn *ret = NULL;
2643 if ((host = strdup(av)) == NULL)
2645 if ((ch = strrchr(host, '/')) != NULL)
2648 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2649 inet_pton(AF_INET6, host, &a) == 1)
2650 ret = add_srcip6(cmd, av);
2651 /* XXX: should check for IPv4, not !IPv6 */
2652 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2653 inet_pton(AF_INET6, host, &a) != 1))
2654 ret = add_srcip(cmd, av);
2655 if (ret == NULL && strcmp(av, "any") != 0)
2663 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2667 ipfw_insn *ret = NULL;
2669 if ((host = strdup(av)) == NULL)
2671 if ((ch = strrchr(host, '/')) != NULL)
2674 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2675 inet_pton(AF_INET6, host, &a) == 1)
2676 ret = add_dstip6(cmd, av);
2677 /* XXX: should check for IPv4, not !IPv6 */
2678 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2679 inet_pton(AF_INET6, host, &a) != 1))
2680 ret = add_dstip(cmd, av);
2681 if (ret == NULL && strcmp(av, "any") != 0)
2689 * Parse arguments and assemble the microinstructions which make up a rule.
2690 * Rules are added into the 'rulebuf' and then copied in the correct order
2691 * into the actual rule.
2693 * The syntax for a rule starts with the action, followed by
2694 * optional action parameters, and the various match patterns.
2695 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2696 * (generated if the rule includes a keep-state option), then the
2697 * various match patterns, log/altq actions, and the actual action.
2701 ipfw_add(char *av[])
2704 * rules are added into the 'rulebuf' and then copied in
2705 * the correct order into the actual rule.
2706 * Some things that need to go out of order (prob, action etc.)
2709 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2711 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2712 ipfw_insn *first_cmd; /* first match pattern */
2717 * various flags used to record that we entered some fields.
2719 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2720 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2725 int open_par = 0; /* open parenthesis ( */
2727 /* proto is here because it is used to fetch ports */
2728 u_char proto = IPPROTO_IP; /* default protocol */
2730 double match_prob = 1; /* match probability, default is always match */
2732 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2733 bzero(cmdbuf, sizeof(cmdbuf));
2734 bzero(rulebuf, sizeof(rulebuf));
2736 rule = (struct ip_fw *)rulebuf;
2737 cmd = (ipfw_insn *)cmdbuf;
2738 action = (ipfw_insn *)actbuf;
2742 /* [rule N] -- Rule number optional */
2743 if (av[0] && isdigit(**av)) {
2744 rule->rulenum = atoi(*av);
2748 /* [set N] -- set number (0..RESVD_SET), optional */
2749 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
2750 int set = strtoul(av[1], NULL, 10);
2751 if (set < 0 || set > RESVD_SET)
2752 errx(EX_DATAERR, "illegal set %s", av[1]);
2757 /* [prob D] -- match probability, optional */
2758 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2759 match_prob = strtod(av[1], NULL);
2761 if (match_prob <= 0 || match_prob > 1)
2762 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2766 /* action -- mandatory */
2767 NEED1("missing action");
2768 i = match_token(rule_actions, *av);
2770 action->len = 1; /* default */
2772 case TOK_CHECKSTATE:
2773 have_state = action;
2774 action->opcode = O_CHECK_STATE;
2778 action->opcode = O_ACCEPT;
2782 action->opcode = O_DENY;
2787 action->opcode = O_REJECT;
2788 action->arg1 = ICMP_UNREACH_HOST;
2792 action->opcode = O_REJECT;
2793 action->arg1 = ICMP_REJECT_RST;
2797 action->opcode = O_UNREACH6;
2798 action->arg1 = ICMP6_UNREACH_RST;
2802 action->opcode = O_REJECT;
2803 NEED1("missing reject code");
2804 fill_reject_code(&action->arg1, *av);
2809 action->opcode = O_UNREACH6;
2810 NEED1("missing unreach code");
2811 fill_unreach6_code(&action->arg1, *av);
2816 action->opcode = O_COUNT;
2820 action->opcode = O_NAT;
2821 action->len = F_INSN_SIZE(ipfw_insn_nat);
2822 if (_substrcmp(*av, "global") == 0) {
2830 action->opcode = O_QUEUE;
2833 action->opcode = O_PIPE;
2836 action->opcode = O_SKIPTO;
2839 action->opcode = O_NETGRAPH;
2842 action->opcode = O_NGTEE;
2845 action->opcode = O_DIVERT;
2848 action->opcode = O_TEE;
2851 action->opcode = O_CALLRETURN;
2854 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2855 if (isdigit(**av)) {
2856 action->arg1 = strtoul(*av, NULL, 10);
2857 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2858 errx(EX_DATAERR, "illegal argument for %s",
2860 } else if (_substrcmp(*av, "tablearg") == 0) {
2861 action->arg1 = IP_FW_TABLEARG;
2862 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2865 s = getservbyname(av[0], "divert");
2867 action->arg1 = ntohs(s->s_port);
2869 errx(EX_DATAERR, "illegal divert/tee port");
2871 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2877 * Locate the address-port separator (':' or ',').
2878 * Could be one of the following:
2882 * IPv6 w:x:y::z,port
2883 * The ':' can only be used with hostname and IPv4 address.
2884 * XXX-BZ Should we also support [w:x:y::z]:port?
2886 struct sockaddr_storage result;
2887 struct addrinfo *res;
2890 u_short port_number;
2892 NEED1("missing forward address[:port]");
2895 * locate the address-port separator (':' or ',')
2897 s = strchr(*av, ',');
2899 /* Distinguish between IPv4:port and IPv6 cases. */
2900 s = strchr(*av, ':');
2901 if (s && strchr(s+1, ':'))
2902 s = NULL; /* no port */
2907 /* Terminate host portion and set s to start of port. */
2909 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2912 "illegal forwarding port ``%s''", s);
2913 port_number = (u_short)i;
2916 if (_substrcmp(*av, "tablearg") == 0) {
2918 ((struct sockaddr_in*)&result)->sin_addr.s_addr =
2922 * Resolve the host name or address to a family and a
2923 * network representation of the addres.
2925 if (getaddrinfo(*av, NULL, NULL, &res))
2926 errx(EX_DATAERR, NULL);
2927 /* Just use the first host in the answer. */
2928 family = res->ai_family;
2929 memcpy(&result, res->ai_addr, res->ai_addrlen);
2933 if (family == PF_INET) {
2934 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2936 action->opcode = O_FORWARD_IP;
2937 action->len = F_INSN_SIZE(ipfw_insn_sa);
2940 * In the kernel we assume AF_INET and use only
2941 * sin_port and sin_addr. Remember to set sin_len as
2942 * the routing code seems to use it too.
2944 p->sa.sin_len = sizeof(struct sockaddr_in);
2945 p->sa.sin_family = AF_INET;
2946 p->sa.sin_port = port_number;
2947 p->sa.sin_addr.s_addr =
2948 ((struct sockaddr_in *)&result)->sin_addr.s_addr;
2949 } else if (family == PF_INET6) {
2950 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
2952 action->opcode = O_FORWARD_IP6;
2953 action->len = F_INSN_SIZE(ipfw_insn_sa6);
2955 p->sa.sin6_len = sizeof(struct sockaddr_in6);
2956 p->sa.sin6_family = AF_INET6;
2957 p->sa.sin6_port = port_number;
2958 p->sa.sin6_flowinfo = 0;
2959 p->sa.sin6_scope_id = 0;
2960 /* No table support for v6 yet. */
2961 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr,
2962 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr));
2964 errx(EX_DATAERR, "Invalid address family in forward action");
2970 /* pretend it is a 'count' rule followed by the comment */
2971 action->opcode = O_COUNT;
2972 av--; /* go back... */
2978 size_t intsize = sizeof(int);
2980 action->opcode = O_SETFIB;
2981 NEED1("missing fib number");
2982 if (_substrcmp(*av, "tablearg") == 0) {
2983 action->arg1 = IP_FW_TABLEARG;
2985 action->arg1 = strtoul(*av, NULL, 10);
2986 if (sysctlbyname("net.fibs", &numfibs, &intsize,
2988 errx(EX_DATAERR, "fibs not suported.\n");
2989 if (action->arg1 >= numfibs) /* Temporary */
2990 errx(EX_DATAERR, "fib too large.\n");
2997 action->opcode = O_REASS;
3001 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
3005 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
3007 action = next_cmd(action);
3010 * [altq queuename] -- altq tag, optional
3011 * [log [logamount N]] -- log, optional
3013 * If they exist, it go first in the cmdbuf, but then it is
3014 * skipped in the copy section to the end of the buffer.
3016 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
3021 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
3026 "log cannot be specified more than once");
3027 have_log = (ipfw_insn *)c;
3028 cmd->len = F_INSN_SIZE(ipfw_insn_log);
3029 cmd->opcode = O_LOG;
3030 if (av[0] && _substrcmp(*av, "logamount") == 0) {
3032 NEED1("logamount requires argument");
3036 "logamount must be positive");
3040 len = sizeof(c->max_log);
3041 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
3042 &c->max_log, &len, NULL, 0) == -1)
3043 errx(1, "sysctlbyname(\"%s\")",
3044 "net.inet.ip.fw.verbose_limit");
3052 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
3054 NEED1("missing altq queue name");
3057 "altq cannot be specified more than once");
3058 have_altq = (ipfw_insn *)a;
3059 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
3060 cmd->opcode = O_ALTQ;
3061 a->qid = altq_name_to_qid(*av);
3072 errx(EX_USAGE, "tag and untag cannot be "
3073 "specified more than once");
3074 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
3075 rule_action_params);
3077 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
3085 cmd = next_cmd(cmd);
3088 if (have_state) /* must be a check-state, we are done */
3091 #define OR_START(target) \
3092 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
3094 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
3097 if ( (av[0])[1] == '\0') { \
3108 strcmp(*av, ")") == 0 || \
3109 strcmp(*av, "}") == 0)) { \
3114 errx(EX_USAGE, "missing \")\"\n"); \
3118 if (av[0] && _substrcmp(*av, "not") == 0) { \
3119 if (cmd->len & F_NOT) \
3120 errx(EX_USAGE, "double \"not\" not allowed\n"); \
3121 cmd->len |= F_NOT; \
3125 #define OR_BLOCK(target) \
3126 if (av[0] && _substrcmp(*av, "or") == 0) { \
3127 if (prev == NULL || open_par == 0) \
3128 errx(EX_DATAERR, "invalid OR block"); \
3129 prev->len |= F_OR; \
3139 * MAC addresses, optional.
3140 * If we have this, we skip the part "proto from src to dst"
3141 * and jump straight to the option parsing.
3144 NEED1("missing protocol");
3145 if (_substrcmp(*av, "MAC") == 0 ||
3146 _substrcmp(*av, "mac") == 0) {
3147 av++; /* the "MAC" keyword */
3148 add_mac(cmd, av); /* exits in case of errors */
3149 cmd = next_cmd(cmd);
3150 av += 2; /* dst-mac and src-mac */
3152 NEED1("missing mac type");
3153 if (add_mactype(cmd, av[0]))
3154 cmd = next_cmd(cmd);
3155 av++; /* any or mac-type */
3161 * protocol, mandatory
3163 OR_START(get_proto);
3165 NEED1("missing protocol");
3166 if (add_proto_compat(cmd, *av, &proto)) {
3168 if (F_LEN(cmd) != 0) {
3170 cmd = next_cmd(cmd);
3172 } else if (first_cmd != cmd) {
3173 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3176 OR_BLOCK(get_proto);
3181 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3182 errx(EX_USAGE, "missing ``from''");
3186 * source IP, mandatory
3188 OR_START(source_ip);
3189 NOT_BLOCK; /* optional "not" */
3190 NEED1("missing source address");
3191 if (add_src(cmd, *av, proto)) {
3193 if (F_LEN(cmd) != 0) { /* ! any */
3195 cmd = next_cmd(cmd);
3198 errx(EX_USAGE, "bad source address %s", *av);
3199 OR_BLOCK(source_ip);
3202 * source ports, optional
3204 NOT_BLOCK; /* optional "not" */
3205 if ( av[0] != NULL ) {
3206 if (_substrcmp(*av, "any") == 0 ||
3207 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3209 if (F_LEN(cmd) != 0)
3210 cmd = next_cmd(cmd);
3217 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3218 errx(EX_USAGE, "missing ``to''");
3222 * destination, mandatory
3225 NOT_BLOCK; /* optional "not" */
3226 NEED1("missing dst address");
3227 if (add_dst(cmd, *av, proto)) {
3229 if (F_LEN(cmd) != 0) { /* ! any */
3231 cmd = next_cmd(cmd);
3234 errx( EX_USAGE, "bad destination address %s", *av);
3238 * dest. ports, optional
3240 NOT_BLOCK; /* optional "not" */
3242 if (_substrcmp(*av, "any") == 0 ||
3243 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3245 if (F_LEN(cmd) != 0)
3246 cmd = next_cmd(cmd);
3251 if (av[0] && first_cmd == cmd) {
3253 * nothing specified so far, store in the rule to ease
3259 while ( av[0] != NULL ) {
3261 ipfw_insn_u32 *cmd32; /* alias for cmd */
3264 cmd32 = (ipfw_insn_u32 *)cmd;
3266 if (*s == '!') { /* alternate syntax for NOT */
3267 if (cmd->len & F_NOT)
3268 errx(EX_USAGE, "double \"not\" not allowed\n");
3272 i = match_token(rule_options, s);
3276 if (cmd->len & F_NOT)
3277 errx(EX_USAGE, "double \"not\" not allowed\n");
3282 if (open_par == 0 || prev == NULL)
3283 errx(EX_USAGE, "invalid \"or\" block\n");
3287 case TOK_STARTBRACE:
3289 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3295 errx(EX_USAGE, "+missing \")\"\n");
3301 fill_cmd(cmd, O_IN, 0, 0);
3305 cmd->len ^= F_NOT; /* toggle F_NOT */
3306 fill_cmd(cmd, O_IN, 0, 0);
3310 fill_cmd(cmd, O_DIVERTED, 0, 3);
3313 case TOK_DIVERTEDLOOPBACK:
3314 fill_cmd(cmd, O_DIVERTED, 0, 1);
3317 case TOK_DIVERTEDOUTPUT:
3318 fill_cmd(cmd, O_DIVERTED, 0, 2);
3322 fill_cmd(cmd, O_FRAG, 0, 0);
3326 fill_cmd(cmd, O_LAYER2, 0, 0);
3332 NEED1("recv, xmit, via require interface name"
3334 fill_iface((ipfw_insn_if *)cmd, av[0]);
3336 if (F_LEN(cmd) == 0) /* not a valid address */
3339 cmd->opcode = O_XMIT;
3340 else if (i == TOK_RECV)
3341 cmd->opcode = O_RECV;
3342 else if (i == TOK_VIA)
3343 cmd->opcode = O_VIA;
3347 NEED1("icmptypes requires list of types");
3348 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3352 case TOK_ICMP6TYPES:
3353 NEED1("icmptypes requires list of types");
3354 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3359 NEED1("ipttl requires TTL");
3360 if (strpbrk(*av, "-,")) {
3361 if (!add_ports(cmd, *av, 0, O_IPTTL))
3362 errx(EX_DATAERR, "invalid ipttl %s", *av);
3364 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3369 NEED1("ipid requires id");
3370 if (strpbrk(*av, "-,")) {
3371 if (!add_ports(cmd, *av, 0, O_IPID))
3372 errx(EX_DATAERR, "invalid ipid %s", *av);
3374 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3379 NEED1("iplen requires length");
3380 if (strpbrk(*av, "-,")) {
3381 if (!add_ports(cmd, *av, 0, O_IPLEN))
3382 errx(EX_DATAERR, "invalid ip len %s", *av);
3384 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3389 NEED1("ipver requires version");
3390 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3394 case TOK_IPPRECEDENCE:
3395 NEED1("ipprecedence requires value");
3396 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3397 (strtoul(*av, NULL, 0) & 7) << 5);
3402 NEED1("missing argument for ipoptions");
3403 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3408 NEED1("missing argument for iptos");
3409 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3414 NEED1("uid requires argument");
3420 cmd->opcode = O_UID;
3421 uid = strtoul(*av, &end, 0);
3422 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3424 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3425 cmd32->d[0] = pwd->pw_uid;
3426 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3432 NEED1("gid requires argument");
3438 cmd->opcode = O_GID;
3439 gid = strtoul(*av, &end, 0);
3440 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3442 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3443 cmd32->d[0] = grp->gr_gid;
3444 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3450 NEED1("jail requires argument");
3455 cmd->opcode = O_JAIL;
3456 jid = (int)strtol(*av, &end, 0);
3457 if (jid < 0 || *end != '\0')
3458 errx(EX_DATAERR, "jail requires prison ID");
3459 cmd32->d[0] = (uint32_t)jid;
3460 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3466 fill_cmd(cmd, O_ESTAB, 0, 0);
3470 fill_cmd(cmd, O_TCPFLAGS, 0,
3471 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3474 case TOK_TCPDATALEN:
3475 NEED1("tcpdatalen requires length");
3476 if (strpbrk(*av, "-,")) {
3477 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3478 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3480 fill_cmd(cmd, O_TCPDATALEN, 0,
3481 strtoul(*av, NULL, 0));
3486 NEED1("missing argument for tcpoptions");
3487 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3493 NEED1("tcpseq/tcpack requires argument");
3494 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3495 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3496 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3501 NEED1("tcpwin requires length");
3502 if (strpbrk(*av, "-,")) {
3503 if (!add_ports(cmd, *av, 0, O_TCPWIN))
3504 errx(EX_DATAERR, "invalid tcpwin len %s", *av);
3506 fill_cmd(cmd, O_TCPWIN, 0,
3507 strtoul(*av, NULL, 0));
3512 NEED1("missing argument for tcpflags");
3513 cmd->opcode = O_TCPFLAGS;
3514 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3520 errx(EX_USAGE, "keep-state cannot be part "
3523 errx(EX_USAGE, "only one of keep-state "
3524 "and limit is allowed");
3526 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3530 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3535 "limit cannot be part of an or block");
3537 errx(EX_USAGE, "only one of keep-state and "
3538 "limit is allowed");
3541 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3542 cmd->opcode = O_LIMIT;
3543 c->limit_mask = c->conn_limit = 0;
3545 while ( av[0] != NULL ) {
3546 if ((val = match_token(limit_masks, *av)) <= 0)
3548 c->limit_mask |= val;
3552 if (c->limit_mask == 0)
3553 errx(EX_USAGE, "limit: missing limit mask");
3555 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3556 TOK_LIMIT, rule_options);
3563 NEED1("missing protocol");
3564 if (add_proto(cmd, *av, &proto)) {
3567 errx(EX_DATAERR, "invalid protocol ``%s''",
3572 NEED1("missing source IP");
3573 if (add_srcip(cmd, *av)) {
3579 NEED1("missing destination IP");
3580 if (add_dstip(cmd, *av)) {
3586 NEED1("missing source IP6");
3587 if (add_srcip6(cmd, *av)) {
3593 NEED1("missing destination IP6");
3594 if (add_dstip6(cmd, *av)) {
3600 NEED1("missing source port");
3601 if (_substrcmp(*av, "any") == 0 ||
3602 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3605 errx(EX_DATAERR, "invalid source port %s", *av);
3609 NEED1("missing destination port");
3610 if (_substrcmp(*av, "any") == 0 ||
3611 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3614 errx(EX_DATAERR, "invalid destination port %s",
3619 if (add_mac(cmd, av))
3624 NEED1("missing mac type");
3625 if (!add_mactype(cmd, *av))
3626 errx(EX_DATAERR, "invalid mac type %s", *av);
3630 case TOK_VERREVPATH:
3631 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3634 case TOK_VERSRCREACH:
3635 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3639 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3643 fill_cmd(cmd, O_IPSEC, 0, 0);
3647 fill_cmd(cmd, O_IP6, 0, 0);
3651 fill_cmd(cmd, O_IP4, 0, 0);
3655 fill_ext6hdr( cmd, *av );
3660 if (proto != IPPROTO_IPV6 )
3661 errx( EX_USAGE, "flow-id filter is active "
3662 "only for ipv6 protocol\n");
3663 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3668 fill_comment(cmd, av);
3673 if (av[0] && strpbrk(*av, "-,")) {
3674 if (!add_ports(cmd, *av, 0, O_TAGGED))
3675 errx(EX_DATAERR, "tagged: invalid tag"
3681 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3682 TOK_TAGGED, rule_options);
3683 fill_cmd(cmd, O_TAGGED, 0, tag);
3689 NEED1("fib requires fib number");
3690 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3694 fill_cmd(cmd, O_SOCKARG, 0, 0);
3698 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3702 if (!av[0] || !av[1])
3703 errx(EX_USAGE, "format: lookup argument tablenum");
3704 cmd->opcode = O_IP_DST_LOOKUP;
3705 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3706 i = match_token(rule_options, *av);
3707 for (j = 0; lookup_key[j] >= 0 ; j++) {
3708 if (i == lookup_key[j])
3711 if (lookup_key[j] <= 0)
3712 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3713 __PAST_END(c->d, 1) = j; // i converted to option
3715 cmd->arg1 = strtoul(*av, &p, 0);
3717 errx(EX_USAGE, "format: lookup argument tablenum");
3723 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3725 if (F_LEN(cmd) > 0) { /* prepare to advance */
3727 cmd = next_cmd(cmd);
3733 * Now copy stuff into the rule.
3734 * If we have a keep-state option, the first instruction
3735 * must be a PROBE_STATE (which is generated here).
3736 * If we have a LOG option, it was stored as the first command,
3737 * and now must be moved to the top of the action part.
3739 dst = (ipfw_insn *)rule->cmd;
3742 * First thing to write into the command stream is the match probability.
3744 if (match_prob != 1) { /* 1 means always match */
3745 dst->opcode = O_PROB;
3747 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3752 * generate O_PROBE_STATE if necessary
3754 if (have_state && have_state->opcode != O_CHECK_STATE) {
3755 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3756 dst = next_cmd(dst);
3759 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3760 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3763 switch (src->opcode) {
3771 bcopy(src, dst, i * sizeof(uint32_t));
3777 * put back the have_state command as last opcode
3779 if (have_state && have_state->opcode != O_CHECK_STATE) {
3780 i = F_LEN(have_state);
3781 bcopy(have_state, dst, i * sizeof(uint32_t));
3785 * start action section
3787 rule->act_ofs = dst - rule->cmd;
3789 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3791 i = F_LEN(have_log);
3792 bcopy(have_log, dst, i * sizeof(uint32_t));
3796 i = F_LEN(have_altq);
3797 bcopy(have_altq, dst, i * sizeof(uint32_t));
3801 i = F_LEN(have_tag);
3802 bcopy(have_tag, dst, i * sizeof(uint32_t));
3806 * copy all other actions
3808 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3810 bcopy(src, dst, i * sizeof(uint32_t));
3814 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3815 i = (char *)dst - (char *)rule;
3816 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3817 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3819 show_ipfw(rule, 0, 0);
3823 * clear the counters or the log counters.
3826 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3828 uint32_t arg, saved_arg;
3831 char const *name = optname ? "RESETLOG" : "ZERO";
3833 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3838 /* clear all entries */
3839 if (do_cmd(optname, NULL, 0) < 0)
3840 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3842 printf("%s.\n", optname == IP_FW_ZERO ?
3843 "Accounting cleared":"Logging counts reset");
3850 if (isdigit(**av)) {
3851 arg = strtonum(*av, 0, 0xffff, &errstr);
3854 "invalid rule number %s\n", *av);
3857 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3860 if (do_cmd(optname, &arg, sizeof(arg))) {
3861 warn("rule %u: setsockopt(IP_FW_%s)",
3863 failed = EX_UNAVAILABLE;
3864 } else if (!co.do_quiet)
3865 printf("Entry %d %s.\n", saved_arg,
3866 optname == IP_FW_ZERO ?
3867 "cleared" : "logging count reset");
3869 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3872 if (failed != EX_OK)
3877 ipfw_flush(int force)
3879 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3881 if (!force && !co.do_quiet) { /* need to ask user */
3884 printf("Are you sure? [yn] ");
3887 c = toupper(getc(stdin));
3888 while (c != '\n' && getc(stdin) != '\n')
3890 return; /* and do not flush */
3891 } while (c != 'Y' && c != 'N');
3893 if (c == 'N') /* user said no */
3900 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3902 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3903 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3904 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3905 } else if (do_cmd(cmd, NULL, 0) < 0)
3906 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3907 co.do_pipe ? "DUMMYNET" : "FW");
3909 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3913 static void table_list(uint16_t num, int need_header);
3916 * This one handles all table-related commands
3917 * ipfw table N add addr[/masklen] [value]
3918 * ipfw table N delete addr[/masklen]
3919 * ipfw table {N | all} flush
3920 * ipfw table {N | all} list
3923 ipfw_table_handler(int ac, char *av[])
3925 ipfw_table_xentry xent;
3930 uint32_t a, type, mask, addrlen;
3931 uint32_t tables_max;
3933 len = sizeof(tables_max);
3934 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3936 errx(1, "Can't determine maximum number of ipfw tables. "
3937 "Perhaps you forgot to load ipfw module?");
3939 memset(&xent, 0, sizeof(xent));
3942 if (ac && isdigit(**av)) {
3943 xent.tbl = atoi(*av);
3946 } else if (ac && _substrcmp(*av, "all") == 0) {
3951 errx(EX_USAGE, "table number or 'all' keyword required");
3952 if (xent.tbl >= tables_max)
3953 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3954 "value (%d)", tables_max - 1);
3955 NEED1("table needs command");
3956 if (is_all && _substrcmp(*av, "list") != 0
3957 && _substrcmp(*av, "flush") != 0)
3958 errx(EX_USAGE, "table number required");
3960 if (_substrcmp(*av, "add") == 0 ||
3961 _substrcmp(*av, "delete") == 0) {
3962 do_add = **av == 'a';
3965 errx(EX_USAGE, "address required");
3967 * Let's try to guess type by agrument.
3975 if (ishexnumber(*av[0])) {
3976 /* Remove / if exists */
3977 if ((p = strchr(*av, '/')) != NULL) {
3982 if (inet_pton(AF_INET, *av, &xent.k.addr6) == 1) {
3983 type = IPFW_TABLE_CIDR;
3984 if ((p != NULL) && (mask > 32))
3985 errx(EX_DATAERR, "bad IPv4 mask width: %s", p + 1);
3986 xent.masklen = p ? mask : 32;
3987 addrlen = sizeof(struct in_addr);
3988 } else if (inet_pton(AF_INET6, *av, &xent.k.addr6) == 1) {
3989 type = IPFW_TABLE_CIDR;
3990 if ((p != NULL) && (mask > 128))
3991 errx(EX_DATAERR, "bad IPv6 mask width: %s", p + 1);
3992 xent.masklen = p ? mask : 128;
3993 addrlen = sizeof(struct in6_addr);
3997 if ((type == 0) && (strchr(*av, '.') == NULL)) {
3998 /* Assume interface name. Copy significant data only */
3999 mask = MIN(strlen(*av), IF_NAMESIZE - 1);
4000 memcpy(xent.k.iface, *av, mask);
4001 /* Set mask to exact match */
4002 xent.masklen = 8 * IF_NAMESIZE;
4003 type = IPFW_TABLE_INTERFACE;
4004 addrlen = IF_NAMESIZE;
4008 if (lookup_host(*av, (struct in_addr *)&xent.k.addr6) != 0)
4009 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4011 type = IPFW_TABLE_CIDR;
4012 addrlen = sizeof(struct in_addr);
4016 xent.len = offsetof(ipfw_table_xentry, k) + addrlen;
4021 /* isdigit is a bit of a hack here.. */
4022 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
4023 xent.value = strtoul(*av, NULL, 0);
4025 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
4026 /* The value must be stored in host order *
4027 * so that the values < 65k can be distinguished */
4028 xent.value = ntohl(tval);
4030 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
4035 if (do_setcmd3(do_add ? IP_FW_TABLE_XADD : IP_FW_TABLE_XDEL,
4036 &xent, xent.len) < 0) {
4037 /* If running silent, don't bomb out on these errors. */
4038 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
4039 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
4040 do_add ? "XADD" : "XDEL");
4041 /* In silent mode, react to a failed add by deleting */
4043 do_setcmd3(IP_FW_TABLE_XDEL, &xent, xent.len);
4044 if (do_setcmd3(IP_FW_TABLE_XADD, &xent, xent.len) < 0)
4046 "setsockopt(IP_FW_TABLE_XADD)");
4049 } else if (_substrcmp(*av, "flush") == 0) {
4050 a = is_all ? tables_max : (uint32_t)(xent.tbl + 1);
4052 if (do_cmd(IP_FW_TABLE_FLUSH, &xent.tbl,
4053 sizeof(xent.tbl)) < 0)
4054 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
4055 } while (++xent.tbl < a);
4056 } else if (_substrcmp(*av, "list") == 0) {
4057 a = is_all ? tables_max : (uint32_t)(xent.tbl + 1);
4059 table_list(xent.tbl, is_all);
4060 } while (++xent.tbl < a);
4062 errx(EX_USAGE, "invalid table command %s", *av);
4066 table_list(uint16_t num, int need_header)
4069 ipfw_table_xentry *xent;
4071 uint32_t *a, sz, tval;
4073 struct in6_addr *addr6;
4074 ip_fw3_opheader *op3;
4076 /* Prepend value with IP_FW3 header */
4077 l = sizeof(ip_fw3_opheader) + sizeof(uint32_t);
4079 /* Zero reserved fields */
4080 memset(op3, 0, sizeof(ip_fw3_opheader));
4081 a = (uint32_t *)(op3 + 1);
4083 op3->opcode = IP_FW_TABLE_XGETSIZE;
4084 if (do_cmd(IP_FW3, op3, (uintptr_t)&l) < 0)
4085 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XGETSIZE)");
4087 /* If a is zero we have nothing to do, the table is empty. */
4092 tbl = safe_calloc(1, l);
4093 tbl->opheader.opcode = IP_FW_TABLE_XLIST;
4095 if (do_cmd(IP_FW3, tbl, (uintptr_t)&l) < 0)
4096 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XLIST)");
4097 if (tbl->cnt && need_header)
4098 printf("---table(%d)---\n", tbl->tbl);
4099 sz = tbl->size - sizeof(ipfw_xtable);
4100 xent = &tbl->xent[0];
4102 switch (tbl->type) {
4103 case IPFW_TABLE_CIDR:
4104 /* IPv4 or IPv6 prefixes */
4106 addr6 = &xent->k.addr6;
4108 if ((addr6->s6_addr32[0] == 0) && (addr6->s6_addr32[1] == 0) &&
4109 (addr6->s6_addr32[2] == 0)) {
4111 inet_ntop(AF_INET, &addr6->s6_addr32[3], tbuf, sizeof(tbuf));
4114 inet_ntop(AF_INET6, addr6, tbuf, sizeof(tbuf));
4117 if (co.do_value_as_ip) {
4119 printf("%s/%u %s\n", tbuf, xent->masklen,
4120 inet_ntoa(*(struct in_addr *)&tval));
4122 printf("%s/%u %u\n", tbuf, xent->masklen, tval);
4124 case IPFW_TABLE_INTERFACE:
4125 /* Interface names */
4127 if (co.do_value_as_ip) {
4129 printf("%s %s\n", xent->k.iface,
4130 inet_ntoa(*(struct in_addr *)&tval));
4132 printf("%s %u\n", xent->k.iface, tval);
4138 xent = (void *)xent + xent->len;