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
20 * $FreeBSD: head/sbin/ipfw/ipfw2.c 187983 2009-02-01 16:00:49Z luigi $
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <sys/sockio.h>
26 #include <sys/sysctl.h>
40 #include <time.h> /* ctime */
41 #include <timeconv.h> /* _long_to_time */
45 #include <net/ethernet.h>
46 #include <net/if.h> /* only IFNAMSIZ */
47 #include <netinet/in.h>
48 #include <netinet/in_systm.h> /* only n_short, n_long */
49 #include <netinet/ip.h>
50 #include <netinet/ip_icmp.h>
51 #include <netinet/ip_fw.h>
52 #include <netinet/tcp.h>
53 #include <arpa/inet.h>
55 struct cmdline_opts co; /* global options */
57 int resvd_set_number = RESVD_SET;
59 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
61 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
62 if (_substrcmp(*av, "tablearg") == 0) { \
63 arg = IP_FW_TABLEARG; \
71 val = strtol(*av, &end, 10); \
73 if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \
74 errx(EX_DATAERR, "%s: invalid argument: %s", \
75 match_value(s_x, tok), *av); \
77 if (errno == ERANGE || val < min || val > max) \
78 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
79 match_value(s_x, tok), min, max, *av); \
81 if (val == IP_FW_TABLEARG) \
82 errx(EX_DATAERR, "%s: illegal argument value: %s", \
83 match_value(s_x, tok), *av); \
89 PRINT_UINT_ARG(const char *str, uint32_t arg)
93 if (arg == IP_FW_TABLEARG)
99 static struct _s_x f_tcpflags[] = {
110 static struct _s_x f_tcpopts[] = {
111 { "mss", IP_FW_TCPOPT_MSS },
112 { "maxseg", IP_FW_TCPOPT_MSS },
113 { "window", IP_FW_TCPOPT_WINDOW },
114 { "sack", IP_FW_TCPOPT_SACK },
115 { "ts", IP_FW_TCPOPT_TS },
116 { "timestamp", IP_FW_TCPOPT_TS },
117 { "cc", IP_FW_TCPOPT_CC },
123 * IP options span the range 0 to 255 so we need to remap them
124 * (though in fact only the low 5 bits are significant).
126 static struct _s_x f_ipopts[] = {
127 { "ssrr", IP_FW_IPOPT_SSRR},
128 { "lsrr", IP_FW_IPOPT_LSRR},
129 { "rr", IP_FW_IPOPT_RR},
130 { "ts", IP_FW_IPOPT_TS},
135 static struct _s_x f_iptos[] = {
136 { "lowdelay", IPTOS_LOWDELAY},
137 { "throughput", IPTOS_THROUGHPUT},
138 { "reliability", IPTOS_RELIABILITY},
139 { "mincost", IPTOS_MINCOST},
140 { "congestion", IPTOS_ECN_CE},
141 { "ecntransport", IPTOS_ECN_ECT0},
142 { "ip tos option", 0},
146 static struct _s_x limit_masks[] = {
147 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
148 {"src-addr", DYN_SRC_ADDR},
149 {"src-port", DYN_SRC_PORT},
150 {"dst-addr", DYN_DST_ADDR},
151 {"dst-port", DYN_DST_PORT},
156 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
157 * This is only used in this code.
159 #define IPPROTO_ETHERTYPE 0x1000
160 static struct _s_x ether_types[] = {
162 * Note, we cannot use "-:&/" in the names because they are field
163 * separators in the type specifications. Also, we use s = NULL as
164 * end-delimiter, because a type of 0 can be legal.
177 { "pppoe_disc", 0x8863 },
178 { "pppoe_sess", 0x8864 },
179 { "ipx_8022", 0x00E0 },
180 { "ipx_8023", 0x0000 },
181 { "ipx_ii", 0x8137 },
182 { "ipx_snap", 0x8137 },
189 static struct _s_x rule_actions[] = {
190 { "accept", TOK_ACCEPT },
191 { "pass", TOK_ACCEPT },
192 { "allow", TOK_ACCEPT },
193 { "permit", TOK_ACCEPT },
194 { "count", TOK_COUNT },
195 { "pipe", TOK_PIPE },
196 { "queue", TOK_QUEUE },
197 { "divert", TOK_DIVERT },
199 { "netgraph", TOK_NETGRAPH },
200 { "ngtee", TOK_NGTEE },
201 { "fwd", TOK_FORWARD },
202 { "forward", TOK_FORWARD },
203 { "skipto", TOK_SKIPTO },
204 { "deny", TOK_DENY },
205 { "drop", TOK_DENY },
206 { "reject", TOK_REJECT },
207 { "reset6", TOK_RESET6 },
208 { "reset", TOK_RESET },
209 { "unreach6", TOK_UNREACH6 },
210 { "unreach", TOK_UNREACH },
211 { "check-state", TOK_CHECKSTATE },
212 { "//", TOK_COMMENT },
214 { "reass", TOK_REASS },
215 { "setfib", TOK_SETFIB },
216 { NULL, 0 } /* terminator */
219 static struct _s_x rule_action_params[] = {
220 { "altq", TOK_ALTQ },
223 { "untag", TOK_UNTAG },
224 { NULL, 0 } /* terminator */
227 /* index of 'lookup ... ' keys in the kernel */
228 static int lookup_key[] = {
229 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
230 TOK_UID, TOK_GID, TOK_JAIL,
231 TOK_PROTO, TOK_MACTYPE, 0, };
233 static struct _s_x rule_options[] = {
234 { "tagged", TOK_TAGGED },
237 { "jail", TOK_JAIL },
239 { "limit", TOK_LIMIT },
240 { "keep-state", TOK_KEEPSTATE },
241 { "bridged", TOK_LAYER2 },
242 { "layer2", TOK_LAYER2 },
244 { "diverted", TOK_DIVERTED },
245 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
246 { "diverted-output", TOK_DIVERTEDOUTPUT },
247 { "xmit", TOK_XMIT },
248 { "recv", TOK_RECV },
250 { "fragment", TOK_FRAG },
251 { "frag", TOK_FRAG },
253 { "ipoptions", TOK_IPOPTS },
254 { "ipopts", TOK_IPOPTS },
255 { "iplen", TOK_IPLEN },
256 { "ipid", TOK_IPID },
257 { "ipprecedence", TOK_IPPRECEDENCE },
258 { "iptos", TOK_IPTOS },
259 { "ipttl", TOK_IPTTL },
260 { "ipversion", TOK_IPVER },
261 { "ipver", TOK_IPVER },
262 { "estab", TOK_ESTAB },
263 { "established", TOK_ESTAB },
264 { "setup", TOK_SETUP },
265 { "tcpdatalen", TOK_TCPDATALEN },
266 { "tcpflags", TOK_TCPFLAGS },
267 { "tcpflgs", TOK_TCPFLAGS },
268 { "tcpoptions", TOK_TCPOPTS },
269 { "tcpopts", TOK_TCPOPTS },
270 { "tcpseq", TOK_TCPSEQ },
271 { "tcpack", TOK_TCPACK },
272 { "tcpwin", TOK_TCPWIN },
273 { "icmptype", TOK_ICMPTYPES },
274 { "icmptypes", TOK_ICMPTYPES },
275 { "dst-ip", TOK_DSTIP },
276 { "src-ip", TOK_SRCIP },
277 { "dst-port", TOK_DSTPORT },
278 { "src-port", TOK_SRCPORT },
279 { "proto", TOK_PROTO },
282 { "mac-type", TOK_MACTYPE },
283 { "verrevpath", TOK_VERREVPATH },
284 { "versrcreach", TOK_VERSRCREACH },
285 { "antispoof", TOK_ANTISPOOF },
286 { "ipsec", TOK_IPSEC },
287 { "icmp6type", TOK_ICMP6TYPES },
288 { "icmp6types", TOK_ICMP6TYPES },
289 { "ext6hdr", TOK_EXT6HDR},
290 { "flow-id", TOK_FLOWID},
295 { "dst-ipv6", TOK_DSTIP6},
296 { "dst-ip6", TOK_DSTIP6},
297 { "src-ipv6", TOK_SRCIP6},
298 { "src-ip6", TOK_SRCIP6},
299 { "lookup", TOK_LOOKUP},
300 { "//", TOK_COMMENT },
302 { "not", TOK_NOT }, /* pseudo option */
303 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
304 { "or", TOK_OR }, /* pseudo option */
305 { "|", /* escape */ TOK_OR }, /* pseudo option */
306 { "{", TOK_STARTBRACE }, /* pseudo option */
307 { "(", TOK_STARTBRACE }, /* pseudo option */
308 { "}", TOK_ENDBRACE }, /* pseudo option */
309 { ")", TOK_ENDBRACE }, /* pseudo option */
310 { NULL, 0 } /* terminator */
314 * The following is used to generate a printable argument for
315 * 64-bit numbers, irrespective of platform alignment and bit size.
316 * Because all the printf in this program use %llu as a format,
317 * we just return an unsigned long long, which is larger than
318 * we need in certain cases, but saves the hassle of using
319 * PRIu64 as a format specifier.
320 * We don't care about inlining, this is not performance critical code.
323 align_uint64(const uint64_t *pll)
327 bcopy (pll, &ret, sizeof(ret));
332 safe_calloc(size_t number, size_t size)
334 void *ret = calloc(number, size);
337 err(EX_OSERR, "calloc");
342 safe_realloc(void *ptr, size_t size)
344 void *ret = realloc(ptr, size);
347 err(EX_OSERR, "realloc");
352 * conditionally runs the command.
355 do_cmd(int optname, void *optval, uintptr_t optlen)
357 static int s = -1; /* the socket */
364 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
366 err(EX_UNAVAILABLE, "socket");
368 if (optname == IP_FW_GET || optname == IP_FW_DYN_GET ||
369 optname == IP_DUMMYNET_GET ||
370 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
371 optname == IP_FW_TABLE_GETSIZE ||
372 optname == IP_FW_NAT_GET_CONFIG ||
373 optname == IP_FW_NAT_GET_LOG)
374 i = getsockopt(s, IPPROTO_IP, optname, optval,
375 (socklen_t *)optlen);
377 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
382 * match_token takes a table and a string, returns the value associated
383 * with the string (-1 in case of failure).
386 match_token(struct _s_x *table, char *string)
389 uint i = strlen(string);
391 for (pt = table ; i && pt->s != NULL ; pt++)
392 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
398 * match_value takes a table and a value, returns the string associated
399 * with the value (NULL in case of failure).
402 match_value(struct _s_x *p, int value)
404 for (; p->s != NULL; p++)
411 * _substrcmp takes two strings and returns 1 if they do not match,
412 * and 0 if they match exactly or the first string is a sub-string
413 * of the second. A warning is printed to stderr in the case that the
414 * first string is a sub-string of the second.
416 * This function will be removed in the future through the usual
417 * deprecation process.
420 _substrcmp(const char *str1, const char* str2)
423 if (strncmp(str1, str2, strlen(str1)) != 0)
426 if (strlen(str1) != strlen(str2))
427 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
433 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
434 * and 0 if they match exactly or the second string is a sub-string
435 * of the first. A warning is printed to stderr in the case that the
436 * first string does not match the third.
438 * This function exists to warn about the bizzare construction
439 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
440 * for "bytes". The problem is that in addition to accepting "by",
441 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
442 * other string beginning with "by".
444 * This function will be removed in the future through the usual
445 * deprecation process.
448 _substrcmp2(const char *str1, const char* str2, const char* str3)
451 if (strncmp(str1, str2, strlen(str2)) != 0)
454 if (strcmp(str1, str3) != 0)
455 warnx("DEPRECATED: '%s' matched '%s'",
461 * prints one port, symbolic or numeric
464 print_port(int proto, uint16_t port)
467 if (proto == IPPROTO_ETHERTYPE) {
470 if (co.do_resolv && (s = match_value(ether_types, port)) )
473 printf("0x%04x", port);
475 struct servent *se = NULL;
477 struct protoent *pe = getprotobynumber(proto);
479 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
482 printf("%s", se->s_name);
488 static struct _s_x _port_name[] = {
489 {"dst-port", O_IP_DSTPORT},
490 {"src-port", O_IP_SRCPORT},
494 {"mac-type", O_MAC_TYPE},
495 {"tcpdatalen", O_TCPDATALEN},
496 {"tagged", O_TAGGED},
501 * Print the values in a list 16-bit items of the types above.
502 * XXX todo: add support for mask.
505 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
507 uint16_t *p = cmd->ports;
512 sep = match_value(_port_name, opcode);
518 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
520 print_port(proto, p[0]);
523 print_port(proto, p[1]);
530 * Like strtol, but also translates service names into port numbers
531 * for some protocols.
533 * proto == -1 disables the protocol check;
534 * proto == IPPROTO_ETHERTYPE looks up an internal table
535 * proto == <some value in /etc/protocols> matches the values there.
536 * Returns *end == s in case the parameter is not found.
539 strtoport(char *s, char **end, int base, int proto)
545 *end = s; /* default - not found */
547 return 0; /* not found */
550 return strtol(s, end, base);
553 * find separator. '\\' escapes the next char.
555 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
556 if (*s1 == '\\' && s1[1] != '\0')
559 buf = safe_calloc(s1 - s + 1, 1);
562 * copy into a buffer skipping backslashes
564 for (p = s, i = 0; p != s1 ; p++)
569 if (proto == IPPROTO_ETHERTYPE) {
570 i = match_token(ether_types, buf);
572 if (i != -1) { /* found */
577 struct protoent *pe = NULL;
581 pe = getprotobynumber(proto);
583 se = getservbyname(buf, pe ? pe->p_name : NULL);
587 return ntohs(se->s_port);
590 return 0; /* not found */
594 * Fill the body of the command with the list of port ranges.
597 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
599 uint16_t a, b, *p = cmd->ports;
604 a = strtoport(av, &s, 0, proto);
605 if (s == av) /* empty or invalid argument */
609 case '-': /* a range */
611 b = strtoport(av, &s, 0, proto);
612 /* Reject expressions like '1-abc' or '1-2-3'. */
613 if (s == av || (*s != ',' && *s != '\0'))
618 case ',': /* comma separated list */
623 warnx("port list: invalid separator <%c> in <%s>",
633 if (i + 1 > F_LEN_MASK)
634 errx(EX_DATAERR, "too many ports/ranges\n");
635 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
640 static struct _s_x icmpcodes[] = {
641 { "net", ICMP_UNREACH_NET },
642 { "host", ICMP_UNREACH_HOST },
643 { "protocol", ICMP_UNREACH_PROTOCOL },
644 { "port", ICMP_UNREACH_PORT },
645 { "needfrag", ICMP_UNREACH_NEEDFRAG },
646 { "srcfail", ICMP_UNREACH_SRCFAIL },
647 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
648 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
649 { "isolated", ICMP_UNREACH_ISOLATED },
650 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
651 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
652 { "tosnet", ICMP_UNREACH_TOSNET },
653 { "toshost", ICMP_UNREACH_TOSHOST },
654 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
655 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
656 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
661 fill_reject_code(u_short *codep, char *str)
666 val = strtoul(str, &s, 0);
667 if (s == str || *s != '\0' || val >= 0x100)
668 val = match_token(icmpcodes, str);
670 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
676 print_reject_code(uint16_t code)
678 char const *s = match_value(icmpcodes, code);
681 printf("unreach %s", s);
683 printf("unreach %u", code);
687 * Returns the number of bits set (from left) in a contiguous bitmask,
688 * or -1 if the mask is not contiguous.
689 * XXX this needs a proper fix.
690 * This effectively works on masks in big-endian (network) format.
691 * when compiled on little endian architectures.
693 * First bit is bit 7 of the first byte -- note, for MAC addresses,
694 * the first bit on the wire is bit 0 of the first byte.
695 * len is the max length in bits.
698 contigmask(uint8_t *p, int len)
702 for (i=0; i<len ; i++)
703 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
705 for (n=i+1; n < len; n++)
706 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
707 return -1; /* mask not contiguous */
712 * print flags set/clear in the two bitmasks passed as parameters.
713 * There is a specialized check for f_tcpflags.
716 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
718 char const *comma = "";
720 uint8_t set = cmd->arg1 & 0xff;
721 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
723 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
728 printf(" %s ", name);
729 for (i=0; list[i].x != 0; i++) {
730 if (set & list[i].x) {
732 printf("%s%s", comma, list[i].s);
735 if (clear & list[i].x) {
737 printf("%s!%s", comma, list[i].s);
744 * Print the ip address contained in a command.
747 print_ip(ipfw_insn_ip *cmd, char const *s)
749 struct hostent *he = NULL;
750 int len = F_LEN((ipfw_insn *)cmd);
751 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
753 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
755 const char *arg = "<invalid>";
757 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
758 arg = match_value(rule_options, lookup_key[d]);
759 printf("%s lookup %s %d,%d", cmd->o.len & F_NOT ? " not": "",
760 arg, cmd->o.arg1, a[0]);
763 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
765 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
769 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
770 cmd->o.opcode == O_IP_DST_LOOKUP) {
771 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
772 if (len == F_INSN_SIZE(ipfw_insn_u32))
777 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
778 uint32_t x, *map = (uint32_t *)&(cmd->mask);
784 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
785 printf("%s/%d", inet_ntoa(cmd->addr),
786 contigmask((uint8_t *)&x, 32));
787 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
788 x &= 0xff; /* base */
790 * Print bits and ranges.
791 * Locate first bit set (i), then locate first bit unset (j).
792 * If we have 3+ consecutive bits set, then print them as a
793 * range, otherwise only print the initial bit and rescan.
795 for (i=0; i < cmd->o.arg1; i++)
796 if (map[i/32] & (1<<(i & 31))) {
797 for (j=i+1; j < cmd->o.arg1; j++)
798 if (!(map[ j/32] & (1<<(j & 31))))
800 printf("%c%d", comma, i+x);
801 if (j>i+2) { /* range has at least 3 elements */
802 printf("-%d", j-1+x);
811 * len == 2 indicates a single IP, whereas lists of 1 or more
812 * addr/mask pairs have len = (2n+1). We convert len to n so we
813 * use that to count the number of entries.
815 for (len = len / 2; len > 0; len--, a += 2) {
816 int mb = /* mask length */
817 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
818 32 : contigmask((uint8_t *)&(a[1]), 32);
819 if (mb == 32 && co.do_resolv)
820 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
821 if (he != NULL) /* resolved to name */
822 printf("%s", he->h_name);
823 else if (mb == 0) /* any */
825 else { /* numeric IP followed by some kind of mask */
826 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
828 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
838 * prints a MAC address/mask pair
841 print_mac(uint8_t *addr, uint8_t *mask)
843 int l = contigmask(mask, 48);
848 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
849 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
851 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
852 mask[0], mask[1], mask[2],
853 mask[3], mask[4], mask[5]);
860 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
869 type = strtoul(av, &av, 0);
871 if (*av != ',' && *av != '\0')
872 errx(EX_DATAERR, "invalid ICMP type");
875 errx(EX_DATAERR, "ICMP type out of range");
877 cmd->d[0] |= 1 << type;
879 cmd->o.opcode = O_ICMPTYPE;
880 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
884 print_icmptypes(ipfw_insn_u32 *cmd)
889 printf(" icmptypes");
890 for (i = 0; i < 32; i++) {
891 if ( (cmd->d[0] & (1 << (i))) == 0)
893 printf("%c%d", sep, i);
899 * show_ipfw() prints the body of an ipfw rule.
900 * Because the standard rule has at least proto src_ip dst_ip, we use
901 * a helper function to produce these entries if not provided explicitly.
902 * The first argument is the list of fields we have, the second is
903 * the list of fields we want to be printed.
905 * Special cases if we have provided a MAC header:
906 * + if the rule does not contain IP addresses/ports, do not print them;
907 * + if the rule does not contain an IP proto, print "all" instead of "ip";
909 * Once we have 'have_options', IP header fields are printed as options.
911 #define HAVE_PROTO 0x0001
912 #define HAVE_SRCIP 0x0002
913 #define HAVE_DSTIP 0x0004
914 #define HAVE_PROTO4 0x0008
915 #define HAVE_PROTO6 0x0010
916 #define HAVE_OPTIONS 0x8000
918 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
920 show_prerequisites(int *flags, int want, int cmd __unused)
924 if ( (*flags & HAVE_IP) == HAVE_IP)
925 *flags |= HAVE_OPTIONS;
927 if ( !(*flags & HAVE_OPTIONS)) {
928 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
929 if ( (*flags & HAVE_PROTO4))
931 else if ( (*flags & HAVE_PROTO6))
936 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
938 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
945 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
947 static int twidth = 0;
949 ipfw_insn *cmd, *tagptr = NULL;
950 const char *comment = NULL; /* ptr to comment if we have one */
951 int proto = 0; /* default */
952 int flags = 0; /* prerequisites */
953 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
954 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
955 int or_block = 0; /* we are in an or block */
956 uint32_t set_disable;
958 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
960 if (set_disable & (1 << rule->set)) { /* disabled */
964 printf("# DISABLED ");
966 printf("%05u ", rule->rulenum);
968 if (pcwidth>0 || bcwidth>0)
969 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
970 bcwidth, align_uint64(&rule->bcnt));
973 printf("%10u ", rule->timestamp);
974 else if (co.do_time == 1) {
976 time_t t = (time_t)0;
979 strcpy(timestr, ctime(&t));
980 *strchr(timestr, '\n') = '\0';
981 twidth = strlen(timestr);
983 if (rule->timestamp) {
984 t = _long_to_time(rule->timestamp);
986 strcpy(timestr, ctime(&t));
987 *strchr(timestr, '\n') = '\0';
988 printf("%s ", timestr);
990 printf("%*s", twidth, " ");
995 printf("set %d ", rule->set);
998 * print the optional "match probability"
1000 if (rule->cmd_len > 0) {
1002 if (cmd->opcode == O_PROB) {
1003 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1004 double d = 1.0 * p->d[0];
1006 d = (d / 0x7fffffff);
1007 printf("prob %f ", d);
1012 * first print actions
1014 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1015 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1016 switch(cmd->opcode) {
1018 printf("check-state");
1019 flags = HAVE_IP; /* avoid printing anything else */
1035 if (cmd->arg1 == ICMP_REJECT_RST)
1037 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1040 print_reject_code(cmd->arg1);
1044 if (cmd->arg1 == ICMP6_UNREACH_RST)
1047 print_unreach6_code(cmd->arg1);
1051 PRINT_UINT_ARG("skipto ", cmd->arg1);
1055 PRINT_UINT_ARG("pipe ", cmd->arg1);
1059 PRINT_UINT_ARG("queue ", cmd->arg1);
1063 PRINT_UINT_ARG("divert ", cmd->arg1);
1067 PRINT_UINT_ARG("tee ", cmd->arg1);
1071 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1075 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1080 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1082 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1083 printf("fwd tablearg");
1085 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1088 printf(",%d", s->sa.sin_port);
1092 case O_LOG: /* O_LOG is printed last */
1093 logptr = (ipfw_insn_log *)cmd;
1096 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1097 altqptr = (ipfw_insn_altq *)cmd;
1105 PRINT_UINT_ARG("nat ", cmd->arg1);
1109 PRINT_UINT_ARG("setfib ", cmd->arg1);
1117 printf("** unrecognized action %d len %d ",
1118 cmd->opcode, cmd->len);
1122 if (logptr->max_log > 0)
1123 printf(" log logamount %d", logptr->max_log);
1128 print_altq_cmd(altqptr);
1131 if (tagptr->len & F_NOT)
1132 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1134 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1138 * then print the body.
1140 for (l = rule->act_ofs, cmd = rule->cmd ;
1141 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1142 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1144 if (cmd->opcode == O_IP4) {
1145 flags |= HAVE_PROTO4;
1147 } else if (cmd->opcode == O_IP6) {
1148 flags |= HAVE_PROTO6;
1152 if (rule->_pad & 1) { /* empty rules before options */
1153 if (!co.do_compact) {
1154 show_prerequisites(&flags, HAVE_PROTO, 0);
1155 printf(" from any to any");
1157 flags |= HAVE_IP | HAVE_OPTIONS;
1160 if (co.comment_only)
1163 for (l = rule->act_ofs, cmd = rule->cmd ;
1164 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1166 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1168 if (co.comment_only) {
1169 if (cmd->opcode != O_NOP)
1171 printf(" // %s\n", (char *)(cmd + 1));
1175 show_prerequisites(&flags, 0, cmd->opcode);
1177 switch(cmd->opcode) {
1179 break; /* done already */
1182 break; /* no need to print anything here */
1185 case O_IP_SRC_LOOKUP:
1189 show_prerequisites(&flags, HAVE_PROTO, 0);
1190 if (!(flags & HAVE_SRCIP))
1192 if ((cmd->len & F_OR) && !or_block)
1194 print_ip((ipfw_insn_ip *)cmd,
1195 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1196 flags |= HAVE_SRCIP;
1200 case O_IP_DST_LOOKUP:
1204 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1205 if (!(flags & HAVE_DSTIP))
1207 if ((cmd->len & F_OR) && !or_block)
1209 print_ip((ipfw_insn_ip *)cmd,
1210 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1211 flags |= HAVE_DSTIP;
1215 case O_IP6_SRC_MASK:
1217 show_prerequisites(&flags, HAVE_PROTO, 0);
1218 if (!(flags & HAVE_SRCIP))
1220 if ((cmd->len & F_OR) && !or_block)
1222 print_ip6((ipfw_insn_ip6 *)cmd,
1223 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1224 flags |= HAVE_SRCIP | HAVE_PROTO;
1228 case O_IP6_DST_MASK:
1230 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1231 if (!(flags & HAVE_DSTIP))
1233 if ((cmd->len & F_OR) && !or_block)
1235 print_ip6((ipfw_insn_ip6 *)cmd,
1236 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1237 flags |= HAVE_DSTIP;
1241 print_flow6id( (ipfw_insn_u32 *) cmd );
1242 flags |= HAVE_OPTIONS;
1246 show_prerequisites(&flags, HAVE_IP, 0);
1248 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1249 if ((cmd->len & F_OR) && !or_block)
1251 if (cmd->len & F_NOT)
1253 print_newports((ipfw_insn_u16 *)cmd, proto,
1254 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1258 struct protoent *pe = NULL;
1260 if ((cmd->len & F_OR) && !or_block)
1262 if (cmd->len & F_NOT)
1265 pe = getprotobynumber(cmd->arg1);
1266 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1267 !(flags & HAVE_PROTO))
1268 show_prerequisites(&flags,
1269 HAVE_IP | HAVE_OPTIONS, 0);
1270 if (flags & HAVE_OPTIONS)
1273 printf(" %s", pe->p_name);
1275 printf(" %u", cmd->arg1);
1277 flags |= HAVE_PROTO;
1280 default: /*options ... */
1281 if (!(cmd->len & (F_OR|F_NOT)))
1282 if (((cmd->opcode == O_IP6) &&
1283 (flags & HAVE_PROTO6)) ||
1284 ((cmd->opcode == O_IP4) &&
1285 (flags & HAVE_PROTO4)))
1287 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1288 if ((cmd->len & F_OR) && !or_block)
1290 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1292 switch(cmd->opcode) {
1294 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1297 print_mac(m->addr, m->mask);
1298 print_mac(m->addr + 6, m->mask + 6);
1303 print_newports((ipfw_insn_u16 *)cmd,
1304 IPPROTO_ETHERTYPE, cmd->opcode);
1313 printf(" fib %u", cmd->arg1 );
1317 printf(cmd->len & F_NOT ? " out" : " in");
1321 switch (cmd->arg1) {
1323 printf(" diverted");
1326 printf(" diverted-loopback");
1329 printf(" diverted-output");
1332 printf(" diverted-?<%u>", cmd->arg1);
1345 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1347 if (cmd->opcode == O_XMIT)
1349 else if (cmd->opcode == O_RECV)
1351 else /* if (cmd->opcode == O_VIA) */
1353 if (cmdif->name[0] == '\0')
1355 inet_ntoa(cmdif->p.ip));
1357 printf(" %s %s", s, cmdif->name);
1362 if (F_LEN(cmd) == 1)
1363 printf(" ipid %u", cmd->arg1 );
1365 print_newports((ipfw_insn_u16 *)cmd, 0,
1370 if (F_LEN(cmd) == 1)
1371 printf(" ipttl %u", cmd->arg1 );
1373 print_newports((ipfw_insn_u16 *)cmd, 0,
1378 printf(" ipver %u", cmd->arg1 );
1381 case O_IPPRECEDENCE:
1382 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1386 if (F_LEN(cmd) == 1)
1387 printf(" iplen %u", cmd->arg1 );
1389 print_newports((ipfw_insn_u16 *)cmd, 0,
1394 print_flags("ipoptions", cmd, f_ipopts);
1398 print_flags("iptos", cmd, f_iptos);
1402 print_icmptypes((ipfw_insn_u32 *)cmd);
1406 printf(" established");
1410 if (F_LEN(cmd) == 1)
1411 printf(" tcpdatalen %u", cmd->arg1 );
1413 print_newports((ipfw_insn_u16 *)cmd, 0,
1418 print_flags("tcpflags", cmd, f_tcpflags);
1422 print_flags("tcpoptions", cmd, f_tcpopts);
1426 printf(" tcpwin %d", ntohs(cmd->arg1));
1430 printf(" tcpack %d", ntohl(cmd32->d[0]));
1434 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1439 struct passwd *pwd = getpwuid(cmd32->d[0]);
1442 printf(" uid %s", pwd->pw_name);
1444 printf(" uid %u", cmd32->d[0]);
1450 struct group *grp = getgrgid(cmd32->d[0]);
1453 printf(" gid %s", grp->gr_name);
1455 printf(" gid %u", cmd32->d[0]);
1460 printf(" jail %d", cmd32->d[0]);
1464 printf(" verrevpath");
1468 printf(" versrcreach");
1472 printf(" antispoof");
1480 comment = (char *)(cmd + 1);
1484 printf(" keep-state");
1488 struct _s_x *p = limit_masks;
1489 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1490 uint8_t x = c->limit_mask;
1491 char const *comma = " ";
1494 for (; p->x != 0 ; p++)
1495 if ((x & p->x) == p->x) {
1497 printf("%s%s", comma, p->s);
1500 PRINT_UINT_ARG(" ", c->conn_limit);
1513 print_icmp6types((ipfw_insn_u32 *)cmd);
1517 print_ext6hdr( (ipfw_insn *) cmd );
1521 if (F_LEN(cmd) == 1)
1522 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1524 print_newports((ipfw_insn_u16 *)cmd, 0,
1529 printf(" [opcode %d len %d]",
1530 cmd->opcode, cmd->len);
1533 if (cmd->len & F_OR) {
1536 } else if (or_block) {
1541 show_prerequisites(&flags, HAVE_IP, 0);
1543 printf(" // %s", comment);
1548 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1550 struct protoent *pe;
1553 char buf[INET6_ADDRSTRLEN];
1555 if (!co.do_expired) {
1556 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1559 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1560 printf("%05d", rulenum);
1561 if (pcwidth>0 || bcwidth>0)
1562 printf(" %*llu %*llu (%ds)", pcwidth,
1563 align_uint64(&d->pcnt), bcwidth,
1564 align_uint64(&d->bcnt), d->expire);
1565 switch (d->dyn_type) {
1566 case O_LIMIT_PARENT:
1567 printf(" PARENT %d", d->count);
1572 case O_KEEP_STATE: /* bidir, no mask */
1577 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1578 printf(" %s", pe->p_name);
1580 printf(" proto %u", d->id.proto);
1582 if (d->id.addr_type == 4) {
1583 a.s_addr = htonl(d->id.src_ip);
1584 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1586 a.s_addr = htonl(d->id.dst_ip);
1587 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1588 } else if (d->id.addr_type == 6) {
1589 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1590 sizeof(buf)), d->id.src_port);
1591 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1592 sizeof(buf)), d->id.dst_port);
1594 printf(" UNKNOWN <-> UNKNOWN\n");
1600 * This one handles all set-related commands
1601 * ipfw set { show | enable | disable }
1603 * ipfw set move X to Y
1604 * ipfw set move rule X to Y
1607 ipfw_sets_handler(int ac, char *av[])
1609 uint32_t set_disable, masks[2];
1612 uint8_t cmd, new_set;
1618 errx(EX_USAGE, "set needs command");
1619 if (_substrcmp(*av, "show") == 0) {
1623 nbytes = sizeof(struct ip_fw);
1624 data = safe_calloc(1, nbytes);
1625 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1626 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1627 bcopy(&((struct ip_fw *)data)->next_rule,
1628 &set_disable, sizeof(set_disable));
1630 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1631 if ((set_disable & (1<<i))) {
1632 printf("%s %d", msg, i);
1635 msg = (set_disable) ? " enable" : "enable";
1636 for (i = 0; i < RESVD_SET; i++)
1637 if (!(set_disable & (1<<i))) {
1638 printf("%s %d", msg, i);
1642 } else if (_substrcmp(*av, "swap") == 0) {
1645 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1646 rulenum = atoi(av[0]);
1647 new_set = atoi(av[1]);
1648 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1649 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1650 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1651 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1652 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1653 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1654 } else if (_substrcmp(*av, "move") == 0) {
1656 if (ac && _substrcmp(*av, "rule") == 0) {
1661 if (ac != 3 || _substrcmp(av[1], "to") != 0)
1662 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1663 rulenum = atoi(av[0]);
1664 new_set = atoi(av[2]);
1665 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1666 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1667 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1668 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1669 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1670 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1671 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1672 } else if (_substrcmp(*av, "disable") == 0 ||
1673 _substrcmp(*av, "enable") == 0 ) {
1674 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1677 masks[0] = masks[1] = 0;
1680 if (isdigit(**av)) {
1682 if (i < 0 || i > RESVD_SET)
1684 "invalid set number %d\n", i);
1685 masks[which] |= (1<<i);
1686 } else if (_substrcmp(*av, "disable") == 0)
1688 else if (_substrcmp(*av, "enable") == 0)
1692 "invalid set command %s\n", *av);
1695 if ( (masks[0] & masks[1]) != 0 )
1697 "cannot enable and disable the same set\n");
1699 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1701 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1703 errx(EX_USAGE, "invalid set command %s\n", *av);
1707 ipfw_sysctl_handler(int ac, char *av[], int which)
1713 warnx("missing keyword to enable/disable\n");
1714 } else if (_substrcmp(*av, "firewall") == 0) {
1715 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1716 &which, sizeof(which));
1717 } else if (_substrcmp(*av, "one_pass") == 0) {
1718 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1719 &which, sizeof(which));
1720 } else if (_substrcmp(*av, "debug") == 0) {
1721 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1722 &which, sizeof(which));
1723 } else if (_substrcmp(*av, "verbose") == 0) {
1724 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1725 &which, sizeof(which));
1726 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1727 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1728 &which, sizeof(which));
1729 } else if (_substrcmp(*av, "altq") == 0) {
1730 altq_set_enabled(which);
1732 warnx("unrecognize enable/disable keyword: %s\n", *av);
1737 ipfw_list(int ac, char *av[], int show_counters)
1740 ipfw_dyn_rule *dynrules = NULL;
1743 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1746 int bcwidth, n, nbytes, pcwidth, width, nstat;
1748 int exitval = EX_OK;
1755 int ocmd = IP_FW_GET;
1758 ocmd = IP_DUMMYNET_GET;
1759 else if (co.do_dynamic)
1760 ocmd = IP_FW_DYN_GET;
1762 int nalloc = 1024; /* start somewhere... */
1767 fprintf(stderr, "Testing only, list disabled\n");
1774 /* get rules or pipes from kernel, resizing array as necessary */
1777 while (nbytes >= nalloc) {
1778 nalloc = nalloc * 2 + 200;
1780 data = safe_realloc(data, nbytes);
1781 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1782 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1783 co.do_pipe ? "DUMMYNET" : "FW");
1787 ipfw_list_pipes(data, nbytes, ac, av);
1792 * Count static rules. They have variable size so we
1793 * need to scan the list to count them.
1798 if (!co.do_dynamic) {
1799 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1800 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1801 ++nstat, r = NEXT(r) )
1806 * Count dynamic rules. This is easier as they have
1809 if (co.do_dynamic) {
1810 dynrules = (ipfw_dyn_rule *)r ;
1811 n = (char *)r - (char *)data;
1812 ndyn = (nbytes - n) / sizeof *dynrules;
1815 /* if showing stats, figure out column widths ahead of time */
1816 bcwidth = pcwidth = 0;
1817 if (show_counters) {
1818 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1819 /* skip rules from another set */
1820 if (co.use_set && r->set != co.use_set - 1)
1823 /* packet counter */
1824 width = snprintf(NULL, 0, "%llu",
1825 align_uint64(&r->pcnt));
1826 if (width > pcwidth)
1830 width = snprintf(NULL, 0, "%llu",
1831 align_uint64(&r->bcnt));
1832 if (width > bcwidth)
1836 if (co.do_dynamic && ndyn) {
1837 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1839 /* skip rules from another set */
1840 bcopy((char *)&d->rule + sizeof(uint16_t),
1841 &set, sizeof(uint8_t));
1842 if (set != co.use_set - 1)
1845 width = snprintf(NULL, 0, "%llu",
1846 align_uint64(&d->pcnt));
1847 if (width > pcwidth)
1850 width = snprintf(NULL, 0, "%llu",
1851 align_uint64(&d->bcnt));
1852 if (width > bcwidth)
1856 /* if no rule numbers were specified, list all rules */
1858 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1859 if (co.use_set && r->set != co.use_set - 1)
1861 show_ipfw(r, pcwidth, bcwidth);
1864 if (co.do_dynamic && ndyn) {
1865 printf("## Dynamic rules (%d):\n", ndyn);
1866 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1868 bcopy((char *)&d->rule + sizeof(uint16_t),
1869 &set, sizeof(uint8_t));
1870 if (set != co.use_set - 1)
1873 show_dyn_ipfw(d, pcwidth, bcwidth);
1879 /* display specific rules requested on command line */
1881 if (!co.do_dynamic) {
1882 for (lac = ac, lav = av; lac != 0; lac--) {
1883 /* convert command line rule # */
1884 last = rnum = strtoul(*lav++, &endptr, 10);
1886 last = strtoul(endptr+1, &endptr, 10);
1889 warnx("invalid rule number: %s", *(lav - 1));
1892 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1893 if (r->rulenum > last)
1895 if (co.use_set && r->set != co.use_set - 1)
1897 if (r->rulenum >= rnum && r->rulenum <= last) {
1898 show_ipfw(r, pcwidth, bcwidth);
1903 /* give precedence to other error(s) */
1904 if (exitval == EX_OK)
1905 exitval = EX_UNAVAILABLE;
1906 warnx("rule %lu does not exist", rnum);
1911 if (co.do_dynamic && ndyn) {
1912 printf("## Dynamic rules:\n");
1913 for (lac = ac, lav = av; lac != 0; lac--) {
1914 last = rnum = strtoul(*lav++, &endptr, 10);
1916 last = strtoul(endptr+1, &endptr, 10);
1918 /* already warned */
1920 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1923 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1927 bcopy((char *)&d->rule + sizeof(uint16_t),
1928 &set, sizeof(uint8_t));
1929 if (set != co.use_set - 1)
1932 if (r->rulenum >= rnum && r->rulenum <= last)
1933 show_dyn_ipfw(d, pcwidth, bcwidth);
1943 if (exitval != EX_OK)
1949 lookup_host (char *host, struct in_addr *ipaddr)
1953 if (!inet_aton(host, ipaddr)) {
1954 if ((he = gethostbyname(host)) == NULL)
1956 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1962 * fills the addr and mask fields in the instruction as appropriate from av.
1963 * Update length as appropriate.
1964 * The following formats are allowed:
1965 * me returns O_IP_*_ME
1966 * 1.2.3.4 single IP address
1967 * 1.2.3.4:5.6.7.8 address:mask
1968 * 1.2.3.4/24 address/mask
1969 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1970 * We can have multiple comma-separated address/mask entries.
1973 fill_ip(ipfw_insn_ip *cmd, char *av)
1976 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
1978 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1980 if (_substrcmp(av, "any") == 0)
1983 if (_substrcmp(av, "me") == 0) {
1984 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1988 if (strncmp(av, "table(", 6) == 0) {
1989 char *p = strchr(av + 6, ',');
1993 cmd->o.opcode = O_IP_DST_LOOKUP;
1994 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
1996 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
1997 d[0] = strtoul(p, NULL, 0);
1999 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2005 * After the address we can have '/' or ':' indicating a mask,
2006 * ',' indicating another address follows, '{' indicating a
2007 * set of addresses of unspecified size.
2009 char *t = NULL, *p = strpbrk(av, "/:,{");
2016 if ((t = strpbrk(p, ",{")) != NULL) {
2023 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2024 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2027 if (!inet_aton(p, (struct in_addr *)&d[1]))
2028 errx(EX_DATAERR, "bad netmask ``%s''", p);
2033 d[1] = htonl(0); /* mask */
2034 else if (masklen > 32)
2035 errx(EX_DATAERR, "bad width ``%s''", p);
2037 d[1] = htonl(~0 << (32 - masklen));
2039 case '{': /* no mask, assume /24 and put back the '{' */
2040 d[1] = htonl(~0 << (32 - 24));
2044 case ',': /* single address plus continuation */
2047 case 0: /* initialization value */
2049 d[1] = htonl(~0); /* force /32 */
2052 d[0] &= d[1]; /* mask base address with mask */
2055 /* find next separator */
2057 p = strpbrk(p, ",{");
2058 if (p && *p == '{') {
2060 * We have a set of addresses. They are stored as follows:
2061 * arg1 is the set size (powers of 2, 2..256)
2062 * addr is the base address IN HOST FORMAT
2063 * mask.. is an array of arg1 bits (rounded up to
2064 * the next multiple of 32) with bits set
2065 * for each host in the map.
2067 uint32_t *map = (uint32_t *)&cmd->mask;
2069 int i = contigmask((uint8_t *)&(d[1]), 32);
2072 errx(EX_DATAERR, "address set cannot be in a list");
2073 if (i < 24 || i > 31)
2074 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2075 cmd->o.arg1 = 1<<(32-i); /* map length */
2076 d[0] = ntohl(d[0]); /* base addr in host format */
2077 cmd->o.opcode = O_IP_DST_SET; /* default */
2078 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2079 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2080 map[i] = 0; /* clear map */
2084 high = low + cmd->o.arg1 - 1;
2086 * Here, i stores the previous value when we specify a range
2087 * of addresses within a mask, e.g. 45-63. i = -1 means we
2088 * have no previous value.
2090 i = -1; /* previous value in a range */
2091 while (isdigit(*av)) {
2093 int a = strtol(av, &s, 0);
2095 if (s == av) { /* no parameter */
2097 errx(EX_DATAERR, "set not closed\n");
2099 errx(EX_DATAERR, "incomplete range %d-", i);
2102 if (a < low || a > high)
2103 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2106 if (i == -1) /* no previous in range */
2108 else { /* check that range is valid */
2110 errx(EX_DATAERR, "invalid range %d-%d",
2113 errx(EX_DATAERR, "double '-' in range");
2116 map[i/32] |= 1<<(i & 31);
2127 if (av) /* then *av must be a ',' */
2130 /* Check this entry */
2131 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2133 * 'any' turns the entire list into a NOP.
2134 * 'not any' never matches, so it is removed from the
2135 * list unless it is the only item, in which case we
2138 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2139 if (av == NULL && len == 0) /* only this entry */
2140 errx(EX_DATAERR, "not any never matches");
2142 /* else do nothing and skip this entry */
2145 /* A single IP can be stored in an optimized format */
2146 if (d[1] == ~0 && av == NULL && len == 0) {
2147 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2150 len += 2; /* two words... */
2153 if (len + 1 > F_LEN_MASK)
2154 errx(EX_DATAERR, "address list too long");
2155 cmd->o.len |= len+1;
2159 /* n2mask sets n bits of the mask */
2161 n2mask(struct in6_addr *mask, int n)
2163 static int minimask[9] =
2164 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2167 memset(mask, 0, sizeof(struct in6_addr));
2168 p = (u_char *) mask;
2169 for (; n > 0; p++, n -= 8) {
2180 * helper function to process a set of flags and set bits in the
2181 * appropriate masks.
2184 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2185 struct _s_x *flags, char *p)
2187 uint8_t set=0, clear=0;
2190 char *q; /* points to the separator */
2192 uint8_t *which; /* mask we are working on */
2202 val = match_token(flags, p);
2204 errx(EX_DATAERR, "invalid flag %s", p);
2205 *which |= (uint8_t)val;
2208 cmd->opcode = opcode;
2209 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2210 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2215 ipfw_delete(int ac, char *av[])
2219 int exitval = EX_OK;
2224 NEED1("missing rule specification");
2225 if (ac > 0 && _substrcmp(*av, "set") == 0) {
2226 /* Do not allow using the following syntax:
2227 * ipfw set N delete set M
2230 errx(EX_DATAERR, "invalid syntax");
2231 do_set = 1; /* delete set */
2236 while (ac && isdigit(**av)) {
2237 i = atoi(*av); av++; ac--;
2239 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2241 exitval = EX_UNAVAILABLE;
2242 warn("rule %u not available", i);
2244 } else if (co.do_pipe) {
2245 exitval = ipfw_delete_pipe(co.do_pipe, i);
2248 rulenum = (i & 0xffff) | (5 << 24) |
2249 ((co.use_set - 1) << 16);
2251 rulenum = (i & 0xffff) | (do_set << 24);
2252 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2254 exitval = EX_UNAVAILABLE;
2255 warn("rule %u: setsockopt(IP_FW_DEL)",
2260 if (exitval != EX_OK)
2266 * fill the interface structure. We do not check the name as we can
2267 * create interfaces dynamically, so checking them at insert time
2268 * makes relatively little sense.
2269 * Interface names containing '*', '?', or '[' are assumed to be shell
2270 * patterns which match interfaces.
2273 fill_iface(ipfw_insn_if *cmd, char *arg)
2275 cmd->name[0] = '\0';
2276 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2278 /* Parse the interface or address */
2279 if (strcmp(arg, "any") == 0)
2280 cmd->o.len = 0; /* effectively ignore this command */
2281 else if (!isdigit(*arg)) {
2282 strlcpy(cmd->name, arg, sizeof(cmd->name));
2283 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2284 } else if (!inet_aton(arg, &cmd->p.ip))
2285 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2289 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2292 char *ap, *ptr, *optr;
2293 struct ether_addr *mac;
2294 const char *macset = "0123456789abcdefABCDEF:";
2296 if (strcmp(p, "any") == 0) {
2297 for (i = 0; i < ETHER_ADDR_LEN; i++)
2298 addr[i] = mask[i] = 0;
2302 optr = ptr = strdup(p);
2303 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2305 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2306 errx(EX_DATAERR, "Incorrect MAC address");
2307 bcopy(mac, addr, ETHER_ADDR_LEN);
2309 errx(EX_DATAERR, "Incorrect MAC address");
2311 if (ptr != NULL) { /* we have mask? */
2312 if (p[ptr - optr - 1] == '/') { /* mask len */
2313 l = strtol(ptr, &ap, 10);
2314 if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0)
2315 errx(EX_DATAERR, "Incorrect mask length");
2316 for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++)
2317 mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l);
2320 if (strspn(ptr, macset) != l ||
2321 (mac = ether_aton(ptr)) == NULL)
2322 errx(EX_DATAERR, "Incorrect mask");
2323 bcopy(mac, mask, ETHER_ADDR_LEN);
2325 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2326 for (i = 0; i < ETHER_ADDR_LEN; i++)
2329 for (i = 0; i < ETHER_ADDR_LEN; i++)
2336 * helper function, updates the pointer to cmd with the length
2337 * of the current command, and also cleans up the first word of
2338 * the new command in case it has been clobbered before.
2341 next_cmd(ipfw_insn *cmd)
2344 bzero(cmd, sizeof(*cmd));
2349 * Takes arguments and copies them into a comment
2352 fill_comment(ipfw_insn *cmd, int ac, char **av)
2355 char *p = (char *)(cmd + 1);
2357 cmd->opcode = O_NOP;
2358 cmd->len = (cmd->len & (F_NOT | F_OR));
2360 /* Compute length of comment string. */
2361 for (i = 0, l = 0; i < ac; i++)
2362 l += strlen(av[i]) + 1;
2367 "comment too long (max 80 chars)");
2369 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2370 for (i = 0; i < ac; i++) {
2379 * A function to fill simple commands of size 1.
2380 * Existing flags are preserved.
2383 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2385 cmd->opcode = opcode;
2386 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2391 * Fetch and add the MAC address and type, with masks. This generates one or
2392 * two microinstructions, and returns the pointer to the last one.
2395 add_mac(ipfw_insn *cmd, int ac, char *av[])
2400 errx(EX_DATAERR, "MAC dst src");
2402 cmd->opcode = O_MACADDR2;
2403 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2405 mac = (ipfw_insn_mac *)cmd;
2406 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2407 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2408 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2413 add_mactype(ipfw_insn *cmd, int ac, char *av)
2416 errx(EX_DATAERR, "missing MAC type");
2417 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2418 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2419 cmd->opcode = O_MAC_TYPE;
2426 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2428 struct protoent *pe;
2432 proto = strtol(av, &ep, 10);
2433 if (*ep != '\0' || proto <= 0) {
2434 if ((pe = getprotobyname(av)) == NULL)
2436 proto = pe->p_proto;
2439 fill_cmd(cmd, O_PROTO, 0, proto);
2445 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2447 u_char proto = IPPROTO_IP;
2449 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2450 ; /* do not set O_IP4 nor O_IP6 */
2451 else if (strcmp(av, "ip4") == 0)
2452 /* explicit "just IPv4" rule */
2453 fill_cmd(cmd, O_IP4, 0, 0);
2454 else if (strcmp(av, "ip6") == 0) {
2455 /* explicit "just IPv6" rule */
2456 proto = IPPROTO_IPV6;
2457 fill_cmd(cmd, O_IP6, 0, 0);
2459 return add_proto0(cmd, av, protop);
2466 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2468 u_char proto = IPPROTO_IP;
2470 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2471 ; /* do not set O_IP4 nor O_IP6 */
2472 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2473 /* explicit "just IPv4" rule */
2474 fill_cmd(cmd, O_IP4, 0, 0);
2475 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2476 /* explicit "just IPv6" rule */
2477 proto = IPPROTO_IPV6;
2478 fill_cmd(cmd, O_IP6, 0, 0);
2480 return add_proto0(cmd, av, protop);
2487 add_srcip(ipfw_insn *cmd, char *av)
2489 fill_ip((ipfw_insn_ip *)cmd, av);
2490 if (cmd->opcode == O_IP_DST_SET) /* set */
2491 cmd->opcode = O_IP_SRC_SET;
2492 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2493 cmd->opcode = O_IP_SRC_LOOKUP;
2494 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2495 cmd->opcode = O_IP_SRC_ME;
2496 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2497 cmd->opcode = O_IP_SRC;
2498 else /* addr/mask */
2499 cmd->opcode = O_IP_SRC_MASK;
2504 add_dstip(ipfw_insn *cmd, char *av)
2506 fill_ip((ipfw_insn_ip *)cmd, av);
2507 if (cmd->opcode == O_IP_DST_SET) /* set */
2509 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2511 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2512 cmd->opcode = O_IP_DST_ME;
2513 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2514 cmd->opcode = O_IP_DST;
2515 else /* addr/mask */
2516 cmd->opcode = O_IP_DST_MASK;
2521 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2523 if (_substrcmp(av, "any") == 0) {
2525 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2526 /* XXX todo: check that we have a protocol with ports */
2527 cmd->opcode = opcode;
2534 add_src(ipfw_insn *cmd, char *av, u_char proto)
2538 ipfw_insn *ret = NULL;
2540 if ((host = strdup(av)) == NULL)
2542 if ((ch = strrchr(host, '/')) != NULL)
2545 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2546 inet_pton(AF_INET6, host, &a))
2547 ret = add_srcip6(cmd, av);
2548 /* XXX: should check for IPv4, not !IPv6 */
2549 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2550 !inet_pton(AF_INET6, host, &a)))
2551 ret = add_srcip(cmd, av);
2552 if (ret == NULL && strcmp(av, "any") != 0)
2560 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2564 ipfw_insn *ret = NULL;
2566 if ((host = strdup(av)) == NULL)
2568 if ((ch = strrchr(host, '/')) != NULL)
2571 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2572 inet_pton(AF_INET6, host, &a))
2573 ret = add_dstip6(cmd, av);
2574 /* XXX: should check for IPv4, not !IPv6 */
2575 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2576 !inet_pton(AF_INET6, host, &a)))
2577 ret = add_dstip(cmd, av);
2578 if (ret == NULL && strcmp(av, "any") != 0)
2586 * Parse arguments and assemble the microinstructions which make up a rule.
2587 * Rules are added into the 'rulebuf' and then copied in the correct order
2588 * into the actual rule.
2590 * The syntax for a rule starts with the action, followed by
2591 * optional action parameters, and the various match patterns.
2592 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2593 * (generated if the rule includes a keep-state option), then the
2594 * various match patterns, log/altq actions, and the actual action.
2598 ipfw_add(int ac, char *av[])
2601 * rules are added into the 'rulebuf' and then copied in
2602 * the correct order into the actual rule.
2603 * Some things that need to go out of order (prob, action etc.)
2606 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2608 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2609 ipfw_insn *first_cmd; /* first match pattern */
2614 * various flags used to record that we entered some fields.
2616 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2617 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2622 int open_par = 0; /* open parenthesis ( */
2624 /* proto is here because it is used to fetch ports */
2625 u_char proto = IPPROTO_IP; /* default protocol */
2627 double match_prob = 1; /* match probability, default is always match */
2629 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2630 bzero(cmdbuf, sizeof(cmdbuf));
2631 bzero(rulebuf, sizeof(rulebuf));
2633 rule = (struct ip_fw *)rulebuf;
2634 cmd = (ipfw_insn *)cmdbuf;
2635 action = (ipfw_insn *)actbuf;
2639 /* [rule N] -- Rule number optional */
2640 if (ac && isdigit(**av)) {
2641 rule->rulenum = atoi(*av);
2646 /* [set N] -- set number (0..RESVD_SET), optional */
2647 if (ac > 1 && _substrcmp(*av, "set") == 0) {
2648 int set = strtoul(av[1], NULL, 10);
2649 if (set < 0 || set > RESVD_SET)
2650 errx(EX_DATAERR, "illegal set %s", av[1]);
2655 /* [prob D] -- match probability, optional */
2656 if (ac > 1 && _substrcmp(*av, "prob") == 0) {
2657 match_prob = strtod(av[1], NULL);
2659 if (match_prob <= 0 || match_prob > 1)
2660 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2664 /* action -- mandatory */
2665 NEED1("missing action");
2666 i = match_token(rule_actions, *av);
2668 action->len = 1; /* default */
2670 case TOK_CHECKSTATE:
2671 have_state = action;
2672 action->opcode = O_CHECK_STATE;
2676 action->opcode = O_ACCEPT;
2680 action->opcode = O_DENY;
2685 action->opcode = O_REJECT;
2686 action->arg1 = ICMP_UNREACH_HOST;
2690 action->opcode = O_REJECT;
2691 action->arg1 = ICMP_REJECT_RST;
2695 action->opcode = O_UNREACH6;
2696 action->arg1 = ICMP6_UNREACH_RST;
2700 action->opcode = O_REJECT;
2701 NEED1("missing reject code");
2702 fill_reject_code(&action->arg1, *av);
2707 action->opcode = O_UNREACH6;
2708 NEED1("missing unreach code");
2709 fill_unreach6_code(&action->arg1, *av);
2714 action->opcode = O_COUNT;
2718 action->opcode = O_NAT;
2719 action->len = F_INSN_SIZE(ipfw_insn_nat);
2723 action->opcode = O_QUEUE;
2726 action->opcode = O_PIPE;
2729 action->opcode = O_SKIPTO;
2732 action->opcode = O_NETGRAPH;
2735 action->opcode = O_NGTEE;
2738 action->opcode = O_DIVERT;
2741 action->opcode = O_TEE;
2744 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2745 if (isdigit(**av)) {
2746 action->arg1 = strtoul(*av, NULL, 10);
2747 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2748 errx(EX_DATAERR, "illegal argument for %s",
2750 } else if (_substrcmp(*av, "tablearg") == 0) {
2751 action->arg1 = IP_FW_TABLEARG;
2752 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2755 s = getservbyname(av[0], "divert");
2757 action->arg1 = ntohs(s->s_port);
2759 errx(EX_DATAERR, "illegal divert/tee port");
2761 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2766 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2769 NEED1("missing forward address[:port]");
2771 action->opcode = O_FORWARD_IP;
2772 action->len = F_INSN_SIZE(ipfw_insn_sa);
2775 * In the kernel we assume AF_INET and use only
2776 * sin_port and sin_addr. Remember to set sin_len as
2777 * the routing code seems to use it too.
2779 p->sa.sin_family = AF_INET;
2780 //p->sa.sin_len = sizeof(struct sockaddr_in);
2783 * locate the address-port separator (':' or ',')
2785 s = strchr(*av, ':');
2787 s = strchr(*av, ',');
2790 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2793 "illegal forwarding port ``%s''", s);
2794 p->sa.sin_port = (u_short)i;
2796 if (_substrcmp(*av, "tablearg") == 0)
2797 p->sa.sin_addr.s_addr = INADDR_ANY;
2799 lookup_host(*av, &(p->sa.sin_addr));
2804 /* pretend it is a 'count' rule followed by the comment */
2805 action->opcode = O_COUNT;
2806 ac++; av--; /* go back... */
2812 size_t intsize = sizeof(int);
2814 action->opcode = O_SETFIB;
2815 NEED1("missing fib number");
2816 action->arg1 = strtoul(*av, NULL, 10);
2817 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
2818 errx(EX_DATAERR, "fibs not suported.\n");
2819 if (action->arg1 >= numfibs) /* Temporary */
2820 errx(EX_DATAERR, "fib too large.\n");
2826 action->opcode = O_REASS;
2830 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2832 action = next_cmd(action);
2835 * [altq queuename] -- altq tag, optional
2836 * [log [logamount N]] -- log, optional
2838 * If they exist, it go first in the cmdbuf, but then it is
2839 * skipped in the copy section to the end of the buffer.
2841 while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
2846 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2851 "log cannot be specified more than once");
2852 have_log = (ipfw_insn *)c;
2853 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2854 cmd->opcode = O_LOG;
2855 if (ac && _substrcmp(*av, "logamount") == 0) {
2857 NEED1("logamount requires argument");
2861 "logamount must be positive");
2865 len = sizeof(c->max_log);
2866 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
2867 &c->max_log, &len, NULL, 0) == -1)
2868 errx(1, "sysctlbyname(\"%s\")",
2869 "net.inet.ip.fw.verbose_limit");
2876 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
2878 NEED1("missing altq queue name");
2881 "altq cannot be specified more than once");
2882 have_altq = (ipfw_insn *)a;
2883 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
2884 cmd->opcode = O_ALTQ;
2885 a->qid = altq_name_to_qid(*av);
2895 errx(EX_USAGE, "tag and untag cannot be "
2896 "specified more than once");
2897 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
2898 rule_action_params);
2900 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
2908 cmd = next_cmd(cmd);
2911 if (have_state) /* must be a check-state, we are done */
2914 #define OR_START(target) \
2915 if (ac && (*av[0] == '(' || *av[0] == '{')) { \
2917 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2920 if ( (av[0])[1] == '\0') { \
2931 strcmp(*av, ")") == 0 || \
2932 strcmp(*av, "}") == 0)) { \
2937 errx(EX_USAGE, "missing \")\"\n"); \
2941 if (ac && _substrcmp(*av, "not") == 0) { \
2942 if (cmd->len & F_NOT) \
2943 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2944 cmd->len |= F_NOT; \
2948 #define OR_BLOCK(target) \
2949 if (ac && _substrcmp(*av, "or") == 0) { \
2950 if (prev == NULL || open_par == 0) \
2951 errx(EX_DATAERR, "invalid OR block"); \
2952 prev->len |= F_OR; \
2962 * MAC addresses, optional.
2963 * If we have this, we skip the part "proto from src to dst"
2964 * and jump straight to the option parsing.
2967 NEED1("missing protocol");
2968 if (_substrcmp(*av, "MAC") == 0 ||
2969 _substrcmp(*av, "mac") == 0) {
2970 ac--; av++; /* the "MAC" keyword */
2971 add_mac(cmd, ac, av); /* exits in case of errors */
2972 cmd = next_cmd(cmd);
2973 ac -= 2; av += 2; /* dst-mac and src-mac */
2975 NEED1("missing mac type");
2976 if (add_mactype(cmd, ac, av[0]))
2977 cmd = next_cmd(cmd);
2978 ac--; av++; /* any or mac-type */
2984 * protocol, mandatory
2986 OR_START(get_proto);
2988 NEED1("missing protocol");
2989 if (add_proto_compat(cmd, *av, &proto)) {
2991 if (F_LEN(cmd) != 0) {
2993 cmd = next_cmd(cmd);
2995 } else if (first_cmd != cmd) {
2996 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
2999 OR_BLOCK(get_proto);
3004 if (!ac || _substrcmp(*av, "from") != 0)
3005 errx(EX_USAGE, "missing ``from''");
3009 * source IP, mandatory
3011 OR_START(source_ip);
3012 NOT_BLOCK; /* optional "not" */
3013 NEED1("missing source address");
3014 if (add_src(cmd, *av, proto)) {
3016 if (F_LEN(cmd) != 0) { /* ! any */
3018 cmd = next_cmd(cmd);
3021 errx(EX_USAGE, "bad source address %s", *av);
3022 OR_BLOCK(source_ip);
3025 * source ports, optional
3027 NOT_BLOCK; /* optional "not" */
3029 if (_substrcmp(*av, "any") == 0 ||
3030 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3032 if (F_LEN(cmd) != 0)
3033 cmd = next_cmd(cmd);
3040 if (!ac || _substrcmp(*av, "to") != 0)
3041 errx(EX_USAGE, "missing ``to''");
3045 * destination, mandatory
3048 NOT_BLOCK; /* optional "not" */
3049 NEED1("missing dst address");
3050 if (add_dst(cmd, *av, proto)) {
3052 if (F_LEN(cmd) != 0) { /* ! any */
3054 cmd = next_cmd(cmd);
3057 errx( EX_USAGE, "bad destination address %s", *av);
3061 * dest. ports, optional
3063 NOT_BLOCK; /* optional "not" */
3065 if (_substrcmp(*av, "any") == 0 ||
3066 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3068 if (F_LEN(cmd) != 0)
3069 cmd = next_cmd(cmd);
3074 if (ac && first_cmd == cmd) {
3076 * nothing specified so far, store in the rule to ease
3084 ipfw_insn_u32 *cmd32; /* alias for cmd */
3087 cmd32 = (ipfw_insn_u32 *)cmd;
3089 if (*s == '!') { /* alternate syntax for NOT */
3090 if (cmd->len & F_NOT)
3091 errx(EX_USAGE, "double \"not\" not allowed\n");
3095 i = match_token(rule_options, s);
3099 if (cmd->len & F_NOT)
3100 errx(EX_USAGE, "double \"not\" not allowed\n");
3105 if (open_par == 0 || prev == NULL)
3106 errx(EX_USAGE, "invalid \"or\" block\n");
3110 case TOK_STARTBRACE:
3112 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3118 errx(EX_USAGE, "+missing \")\"\n");
3124 fill_cmd(cmd, O_IN, 0, 0);
3128 cmd->len ^= F_NOT; /* toggle F_NOT */
3129 fill_cmd(cmd, O_IN, 0, 0);
3133 fill_cmd(cmd, O_DIVERTED, 0, 3);
3136 case TOK_DIVERTEDLOOPBACK:
3137 fill_cmd(cmd, O_DIVERTED, 0, 1);
3140 case TOK_DIVERTEDOUTPUT:
3141 fill_cmd(cmd, O_DIVERTED, 0, 2);
3145 fill_cmd(cmd, O_FRAG, 0, 0);
3149 fill_cmd(cmd, O_LAYER2, 0, 0);
3155 NEED1("recv, xmit, via require interface name"
3157 fill_iface((ipfw_insn_if *)cmd, av[0]);
3159 if (F_LEN(cmd) == 0) /* not a valid address */
3162 cmd->opcode = O_XMIT;
3163 else if (i == TOK_RECV)
3164 cmd->opcode = O_RECV;
3165 else if (i == TOK_VIA)
3166 cmd->opcode = O_VIA;
3170 NEED1("icmptypes requires list of types");
3171 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3175 case TOK_ICMP6TYPES:
3176 NEED1("icmptypes requires list of types");
3177 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3182 NEED1("ipttl requires TTL");
3183 if (strpbrk(*av, "-,")) {
3184 if (!add_ports(cmd, *av, 0, O_IPTTL))
3185 errx(EX_DATAERR, "invalid ipttl %s", *av);
3187 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3192 NEED1("ipid requires id");
3193 if (strpbrk(*av, "-,")) {
3194 if (!add_ports(cmd, *av, 0, O_IPID))
3195 errx(EX_DATAERR, "invalid ipid %s", *av);
3197 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3202 NEED1("iplen requires length");
3203 if (strpbrk(*av, "-,")) {
3204 if (!add_ports(cmd, *av, 0, O_IPLEN))
3205 errx(EX_DATAERR, "invalid ip len %s", *av);
3207 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3212 NEED1("ipver requires version");
3213 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3217 case TOK_IPPRECEDENCE:
3218 NEED1("ipprecedence requires value");
3219 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3220 (strtoul(*av, NULL, 0) & 7) << 5);
3225 NEED1("missing argument for ipoptions");
3226 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3231 NEED1("missing argument for iptos");
3232 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3237 NEED1("uid requires argument");
3243 cmd->opcode = O_UID;
3244 uid = strtoul(*av, &end, 0);
3245 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3247 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3248 cmd32->d[0] = pwd->pw_uid;
3249 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3255 NEED1("gid requires argument");
3261 cmd->opcode = O_GID;
3262 gid = strtoul(*av, &end, 0);
3263 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3265 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3266 cmd32->d[0] = grp->gr_gid;
3267 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3273 NEED1("jail requires argument");
3278 cmd->opcode = O_JAIL;
3279 jid = (int)strtol(*av, &end, 0);
3280 if (jid < 0 || *end != '\0')
3281 errx(EX_DATAERR, "jail requires prison ID");
3282 cmd32->d[0] = (uint32_t)jid;
3283 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3289 fill_cmd(cmd, O_ESTAB, 0, 0);
3293 fill_cmd(cmd, O_TCPFLAGS, 0,
3294 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3297 case TOK_TCPDATALEN:
3298 NEED1("tcpdatalen requires length");
3299 if (strpbrk(*av, "-,")) {
3300 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3301 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3303 fill_cmd(cmd, O_TCPDATALEN, 0,
3304 strtoul(*av, NULL, 0));
3309 NEED1("missing argument for tcpoptions");
3310 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3316 NEED1("tcpseq/tcpack requires argument");
3317 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3318 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3319 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3324 NEED1("tcpwin requires length");
3325 fill_cmd(cmd, O_TCPWIN, 0,
3326 htons(strtoul(*av, NULL, 0)));
3331 NEED1("missing argument for tcpflags");
3332 cmd->opcode = O_TCPFLAGS;
3333 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3339 errx(EX_USAGE, "keep-state cannot be part "
3342 errx(EX_USAGE, "only one of keep-state "
3343 "and limit is allowed");
3345 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3349 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3354 "limit cannot be part of an or block");
3356 errx(EX_USAGE, "only one of keep-state and "
3357 "limit is allowed");
3360 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3361 cmd->opcode = O_LIMIT;
3362 c->limit_mask = c->conn_limit = 0;
3365 if ((val = match_token(limit_masks, *av)) <= 0)
3367 c->limit_mask |= val;
3371 if (c->limit_mask == 0)
3372 errx(EX_USAGE, "limit: missing limit mask");
3374 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3375 TOK_LIMIT, rule_options);
3382 NEED1("missing protocol");
3383 if (add_proto(cmd, *av, &proto)) {
3386 errx(EX_DATAERR, "invalid protocol ``%s''",
3391 NEED1("missing source IP");
3392 if (add_srcip(cmd, *av)) {
3398 NEED1("missing destination IP");
3399 if (add_dstip(cmd, *av)) {
3405 NEED1("missing source IP6");
3406 if (add_srcip6(cmd, *av)) {
3412 NEED1("missing destination IP6");
3413 if (add_dstip6(cmd, *av)) {
3419 NEED1("missing source port");
3420 if (_substrcmp(*av, "any") == 0 ||
3421 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3424 errx(EX_DATAERR, "invalid source port %s", *av);
3428 NEED1("missing destination port");
3429 if (_substrcmp(*av, "any") == 0 ||
3430 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3433 errx(EX_DATAERR, "invalid destination port %s",
3438 if (add_mac(cmd, ac, av)) {
3444 NEED1("missing mac type");
3445 if (!add_mactype(cmd, ac, *av))
3446 errx(EX_DATAERR, "invalid mac type %s", *av);
3450 case TOK_VERREVPATH:
3451 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3454 case TOK_VERSRCREACH:
3455 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3459 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3463 fill_cmd(cmd, O_IPSEC, 0, 0);
3467 fill_cmd(cmd, O_IP6, 0, 0);
3471 fill_cmd(cmd, O_IP4, 0, 0);
3475 fill_ext6hdr( cmd, *av );
3480 if (proto != IPPROTO_IPV6 )
3481 errx( EX_USAGE, "flow-id filter is active "
3482 "only for ipv6 protocol\n");
3483 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3488 fill_comment(cmd, ac, av);
3494 if (ac > 0 && strpbrk(*av, "-,")) {
3495 if (!add_ports(cmd, *av, 0, O_TAGGED))
3496 errx(EX_DATAERR, "tagged: invalid tag"
3502 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3503 TOK_TAGGED, rule_options);
3504 fill_cmd(cmd, O_TAGGED, 0, tag);
3510 NEED1("fib requires fib number");
3511 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3516 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3521 errx(EX_USAGE, "format: lookup argument tablenum[,arg]");
3522 cmd->opcode = O_IP_DST_LOOKUP;
3523 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3524 i = match_token(rule_options, *av);
3525 for (j = 0; lookup_key[j] ; j++) {
3526 if (i == lookup_key[j])
3529 if (lookup_key[j] == 0)
3530 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3531 c->d[1] = j; // i converted to option
3533 p = strchr(*av, ',');
3536 c->d[0] = strtoul(p, NULL, 0);
3540 cmd->arg1 = strtoul(*av, NULL, 0);
3546 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3548 if (F_LEN(cmd) > 0) { /* prepare to advance */
3550 cmd = next_cmd(cmd);
3556 * Now copy stuff into the rule.
3557 * If we have a keep-state option, the first instruction
3558 * must be a PROBE_STATE (which is generated here).
3559 * If we have a LOG option, it was stored as the first command,
3560 * and now must be moved to the top of the action part.
3562 dst = (ipfw_insn *)rule->cmd;
3565 * First thing to write into the command stream is the match probability.
3567 if (match_prob != 1) { /* 1 means always match */
3568 dst->opcode = O_PROB;
3570 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3575 * generate O_PROBE_STATE if necessary
3577 if (have_state && have_state->opcode != O_CHECK_STATE) {
3578 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3579 dst = next_cmd(dst);
3582 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3583 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3586 switch (src->opcode) {
3594 bcopy(src, dst, i * sizeof(uint32_t));
3600 * put back the have_state command as last opcode
3602 if (have_state && have_state->opcode != O_CHECK_STATE) {
3603 i = F_LEN(have_state);
3604 bcopy(have_state, dst, i * sizeof(uint32_t));
3608 * start action section
3610 rule->act_ofs = dst - rule->cmd;
3612 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3614 i = F_LEN(have_log);
3615 bcopy(have_log, dst, i * sizeof(uint32_t));
3619 i = F_LEN(have_altq);
3620 bcopy(have_altq, dst, i * sizeof(uint32_t));
3624 i = F_LEN(have_tag);
3625 bcopy(have_tag, dst, i * sizeof(uint32_t));
3629 * copy all other actions
3631 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3633 bcopy(src, dst, i * sizeof(uint32_t));
3637 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3638 i = (char *)dst - (char *)rule;
3639 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3640 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3642 show_ipfw(rule, 0, 0);
3646 * clear the counters or the log counters.
3649 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3651 uint32_t arg, saved_arg;
3654 char const *name = optname ? "RESETLOG" : "ZERO";
3656 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3661 /* clear all entries */
3662 if (do_cmd(optname, NULL, 0) < 0)
3663 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3665 printf("%s.\n", optname == IP_FW_ZERO ?
3666 "Accounting cleared":"Logging counts reset");
3673 if (isdigit(**av)) {
3674 arg = strtonum(*av, 0, 0xffff, &errstr);
3677 "invalid rule number %s\n", *av);
3680 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3683 if (do_cmd(optname, &arg, sizeof(arg))) {
3684 warn("rule %u: setsockopt(IP_FW_%s)",
3686 failed = EX_UNAVAILABLE;
3687 } else if (!co.do_quiet)
3688 printf("Entry %d %s.\n", saved_arg,
3689 optname == IP_FW_ZERO ?
3690 "cleared" : "logging count reset");
3692 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3695 if (failed != EX_OK)
3700 ipfw_flush(int force)
3702 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3704 if (!force && !co.do_quiet) { /* need to ask user */
3707 printf("Are you sure? [yn] ");
3710 c = toupper(getc(stdin));
3711 while (c != '\n' && getc(stdin) != '\n')
3713 return; /* and do not flush */
3714 } while (c != 'Y' && c != 'N');
3716 if (c == 'N') /* user said no */
3719 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3721 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3722 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3723 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3724 } else if (do_cmd(cmd, NULL, 0) < 0)
3725 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3726 co.do_pipe ? "DUMMYNET" : "FW");
3728 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3732 static void table_list(ipfw_table_entry ent, int need_header);
3735 * This one handles all table-related commands
3736 * ipfw table N add addr[/masklen] [value]
3737 * ipfw table N delete addr[/masklen]
3738 * ipfw table {N | all} flush
3739 * ipfw table {N | all} list
3742 ipfw_table_handler(int ac, char *av[])
3744 ipfw_table_entry ent;
3750 uint32_t tables_max;
3752 len = sizeof(tables_max);
3753 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3755 #ifdef IPFW_TABLES_MAX
3756 warn("Warn: Failed to get the max tables number via sysctl. "
3757 "Using the compiled in defaults. \nThe reason was");
3758 tables_max = IPFW_TABLES_MAX;
3760 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
3765 if (ac && isdigit(**av)) {
3766 ent.tbl = atoi(*av);
3769 } else if (ac && _substrcmp(*av, "all") == 0) {
3774 errx(EX_USAGE, "table number or 'all' keyword required");
3775 if (ent.tbl >= tables_max)
3776 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3777 "value (%d)", tables_max - 1);
3778 NEED1("table needs command");
3779 if (is_all && _substrcmp(*av, "list") != 0
3780 && _substrcmp(*av, "flush") != 0)
3781 errx(EX_USAGE, "table number required");
3783 if (_substrcmp(*av, "add") == 0 ||
3784 _substrcmp(*av, "delete") == 0) {
3785 do_add = **av == 'a';
3788 errx(EX_USAGE, "IP address required");
3789 p = strchr(*av, '/');
3792 ent.masklen = atoi(p);
3793 if (ent.masklen > 32)
3794 errx(EX_DATAERR, "bad width ``%s''", p);
3797 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
3798 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3802 /* isdigit is a bit of a hack here.. */
3803 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
3804 ent.value = strtoul(*av, NULL, 0);
3806 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
3807 /* The value must be stored in host order *
3808 * so that the values < 65k can be distinguished */
3809 ent.value = ntohl(tval);
3811 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3816 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
3817 &ent, sizeof(ent)) < 0) {
3818 /* If running silent, don't bomb out on these errors. */
3819 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
3820 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
3821 do_add ? "ADD" : "DEL");
3822 /* In silent mode, react to a failed add by deleting */
3824 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
3825 if (do_cmd(IP_FW_TABLE_ADD,
3826 &ent, sizeof(ent)) < 0)
3828 "setsockopt(IP_FW_TABLE_ADD)");
3831 } else if (_substrcmp(*av, "flush") == 0) {
3832 a = is_all ? tables_max : (ent.tbl + 1);
3834 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
3835 sizeof(ent.tbl)) < 0)
3836 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
3837 } while (++ent.tbl < a);
3838 } else if (_substrcmp(*av, "list") == 0) {
3839 a = is_all ? tables_max : (ent.tbl + 1);
3841 table_list(ent, is_all);
3842 } while (++ent.tbl < a);
3844 errx(EX_USAGE, "invalid table command %s", *av);
3848 table_list(ipfw_table_entry ent, int need_header)
3856 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
3857 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
3859 /* If a is zero we have nothing to do, the table is empty. */
3863 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
3864 tbl = safe_calloc(1, l);
3866 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
3867 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
3868 if (tbl->cnt && need_header)
3869 printf("---table(%d)---\n", tbl->tbl);
3870 for (a = 0; a < tbl->cnt; a++) {
3872 tval = tbl->ent[a].value;
3873 if (co.do_value_as_ip) {
3875 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
3876 &tbl->ent[a].addr), 127);
3877 /* inet_ntoa expects network order */
3879 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
3880 inet_ntoa(*(struct in_addr *)&tval));
3882 printf("%s/%u %u\n",
3883 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
3884 tbl->ent[a].masklen, tval);