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: user/luigi/ipfw3-head/sbin/ipfw/ipfw2.c 203369 2010-02-02 07:39:56Z 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 _xval = strtol(*av, &end, 10); \
73 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
74 errx(EX_DATAERR, "%s: invalid argument: %s", \
75 match_value(s_x, tok), *av); \
77 if (errno == ERANGE || _xval < min || _xval > 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 (_xval == 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 */
228 * The 'lookup' instruction accepts one of the following arguments.
229 * -1 is a terminator for the list.
230 * Arguments are passed as v[1] in O_DST_LOOKUP options.
232 static int lookup_key[] = {
233 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
234 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
236 static struct _s_x rule_options[] = {
237 { "tagged", TOK_TAGGED },
240 { "jail", TOK_JAIL },
242 { "limit", TOK_LIMIT },
243 { "keep-state", TOK_KEEPSTATE },
244 { "bridged", TOK_LAYER2 },
245 { "layer2", TOK_LAYER2 },
247 { "diverted", TOK_DIVERTED },
248 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
249 { "diverted-output", TOK_DIVERTEDOUTPUT },
250 { "xmit", TOK_XMIT },
251 { "recv", TOK_RECV },
253 { "fragment", TOK_FRAG },
254 { "frag", TOK_FRAG },
256 { "ipoptions", TOK_IPOPTS },
257 { "ipopts", TOK_IPOPTS },
258 { "iplen", TOK_IPLEN },
259 { "ipid", TOK_IPID },
260 { "ipprecedence", TOK_IPPRECEDENCE },
261 { "dscp", TOK_DSCP },
262 { "iptos", TOK_IPTOS },
263 { "ipttl", TOK_IPTTL },
264 { "ipversion", TOK_IPVER },
265 { "ipver", TOK_IPVER },
266 { "estab", TOK_ESTAB },
267 { "established", TOK_ESTAB },
268 { "setup", TOK_SETUP },
269 { "tcpdatalen", TOK_TCPDATALEN },
270 { "tcpflags", TOK_TCPFLAGS },
271 { "tcpflgs", TOK_TCPFLAGS },
272 { "tcpoptions", TOK_TCPOPTS },
273 { "tcpopts", TOK_TCPOPTS },
274 { "tcpseq", TOK_TCPSEQ },
275 { "tcpack", TOK_TCPACK },
276 { "tcpwin", TOK_TCPWIN },
277 { "icmptype", TOK_ICMPTYPES },
278 { "icmptypes", TOK_ICMPTYPES },
279 { "dst-ip", TOK_DSTIP },
280 { "src-ip", TOK_SRCIP },
281 { "dst-port", TOK_DSTPORT },
282 { "src-port", TOK_SRCPORT },
283 { "proto", TOK_PROTO },
286 { "mac-type", TOK_MACTYPE },
287 { "verrevpath", TOK_VERREVPATH },
288 { "versrcreach", TOK_VERSRCREACH },
289 { "antispoof", TOK_ANTISPOOF },
290 { "ipsec", TOK_IPSEC },
291 { "icmp6type", TOK_ICMP6TYPES },
292 { "icmp6types", TOK_ICMP6TYPES },
293 { "ext6hdr", TOK_EXT6HDR},
294 { "flow-id", TOK_FLOWID},
299 { "dst-ipv6", TOK_DSTIP6},
300 { "dst-ip6", TOK_DSTIP6},
301 { "src-ipv6", TOK_SRCIP6},
302 { "src-ip6", TOK_SRCIP6},
303 { "lookup", TOK_LOOKUP},
304 { "//", TOK_COMMENT },
306 { "not", TOK_NOT }, /* pseudo option */
307 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
308 { "or", TOK_OR }, /* pseudo option */
309 { "|", /* escape */ TOK_OR }, /* pseudo option */
310 { "{", TOK_STARTBRACE }, /* pseudo option */
311 { "(", TOK_STARTBRACE }, /* pseudo option */
312 { "}", TOK_ENDBRACE }, /* pseudo option */
313 { ")", TOK_ENDBRACE }, /* pseudo option */
314 { NULL, 0 } /* terminator */
318 * The following is used to generate a printable argument for
319 * 64-bit numbers, irrespective of platform alignment and bit size.
320 * Because all the printf in this program use %llu as a format,
321 * we just return an unsigned long long, which is larger than
322 * we need in certain cases, but saves the hassle of using
323 * PRIu64 as a format specifier.
324 * We don't care about inlining, this is not performance critical code.
327 align_uint64(const uint64_t *pll)
331 bcopy (pll, &ret, sizeof(ret));
336 safe_calloc(size_t number, size_t size)
338 void *ret = calloc(number, size);
341 err(EX_OSERR, "calloc");
346 safe_realloc(void *ptr, size_t size)
348 void *ret = realloc(ptr, size);
351 err(EX_OSERR, "realloc");
356 * conditionally runs the command.
357 * Selected options or negative -> getsockopt
360 do_cmd(int optname, void *optval, uintptr_t optlen)
362 static int s = -1; /* the socket */
369 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
371 err(EX_UNAVAILABLE, "socket");
373 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
374 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
375 optname == IP_FW_TABLE_GETSIZE ||
376 optname == IP_FW_NAT_GET_CONFIG ||
378 optname == IP_FW_NAT_GET_LOG) {
381 i = getsockopt(s, IPPROTO_IP, optname, optval,
382 (socklen_t *)optlen);
384 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
390 * match_token takes a table and a string, returns the value associated
391 * with the string (-1 in case of failure).
394 match_token(struct _s_x *table, char *string)
397 uint i = strlen(string);
399 for (pt = table ; i && pt->s != NULL ; pt++)
400 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
406 * match_value takes a table and a value, returns the string associated
407 * with the value (NULL in case of failure).
410 match_value(struct _s_x *p, int value)
412 for (; p->s != NULL; p++)
419 * _substrcmp takes two strings and returns 1 if they do not match,
420 * and 0 if they match exactly or the first string is a sub-string
421 * of the second. A warning is printed to stderr in the case that the
422 * first string is a sub-string of the second.
424 * This function will be removed in the future through the usual
425 * deprecation process.
428 _substrcmp(const char *str1, const char* str2)
431 if (strncmp(str1, str2, strlen(str1)) != 0)
434 if (strlen(str1) != strlen(str2))
435 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
441 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
442 * and 0 if they match exactly or the second string is a sub-string
443 * of the first. A warning is printed to stderr in the case that the
444 * first string does not match the third.
446 * This function exists to warn about the bizzare construction
447 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
448 * for "bytes". The problem is that in addition to accepting "by",
449 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
450 * other string beginning with "by".
452 * This function will be removed in the future through the usual
453 * deprecation process.
456 _substrcmp2(const char *str1, const char* str2, const char* str3)
459 if (strncmp(str1, str2, strlen(str2)) != 0)
462 if (strcmp(str1, str3) != 0)
463 warnx("DEPRECATED: '%s' matched '%s'",
469 * prints one port, symbolic or numeric
472 print_port(int proto, uint16_t port)
475 if (proto == IPPROTO_ETHERTYPE) {
478 if (co.do_resolv && (s = match_value(ether_types, port)) )
481 printf("0x%04x", port);
483 struct servent *se = NULL;
485 struct protoent *pe = getprotobynumber(proto);
487 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
490 printf("%s", se->s_name);
496 static struct _s_x _port_name[] = {
497 {"dst-port", O_IP_DSTPORT},
498 {"src-port", O_IP_SRCPORT},
502 {"mac-type", O_MAC_TYPE},
503 {"tcpdatalen", O_TCPDATALEN},
504 {"tagged", O_TAGGED},
509 * Print the values in a list 16-bit items of the types above.
510 * XXX todo: add support for mask.
513 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
515 uint16_t *p = cmd->ports;
520 sep = match_value(_port_name, opcode);
526 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
528 print_port(proto, p[0]);
531 print_port(proto, p[1]);
538 * Like strtol, but also translates service names into port numbers
539 * for some protocols.
541 * proto == -1 disables the protocol check;
542 * proto == IPPROTO_ETHERTYPE looks up an internal table
543 * proto == <some value in /etc/protocols> matches the values there.
544 * Returns *end == s in case the parameter is not found.
547 strtoport(char *s, char **end, int base, int proto)
553 *end = s; /* default - not found */
555 return 0; /* not found */
558 return strtol(s, end, base);
561 * find separator. '\\' escapes the next char.
563 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
564 if (*s1 == '\\' && s1[1] != '\0')
567 buf = safe_calloc(s1 - s + 1, 1);
570 * copy into a buffer skipping backslashes
572 for (p = s, i = 0; p != s1 ; p++)
577 if (proto == IPPROTO_ETHERTYPE) {
578 i = match_token(ether_types, buf);
580 if (i != -1) { /* found */
585 struct protoent *pe = NULL;
589 pe = getprotobynumber(proto);
591 se = getservbyname(buf, pe ? pe->p_name : NULL);
595 return ntohs(se->s_port);
598 return 0; /* not found */
602 * Fill the body of the command with the list of port ranges.
605 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
607 uint16_t a, b, *p = cmd->ports;
612 a = strtoport(av, &s, 0, proto);
613 if (s == av) /* empty or invalid argument */
617 case '-': /* a range */
619 b = strtoport(av, &s, 0, proto);
620 /* Reject expressions like '1-abc' or '1-2-3'. */
621 if (s == av || (*s != ',' && *s != '\0'))
626 case ',': /* comma separated list */
631 warnx("port list: invalid separator <%c> in <%s>",
641 if (i + 1 > F_LEN_MASK)
642 errx(EX_DATAERR, "too many ports/ranges\n");
643 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
648 static struct _s_x icmpcodes[] = {
649 { "net", ICMP_UNREACH_NET },
650 { "host", ICMP_UNREACH_HOST },
651 { "protocol", ICMP_UNREACH_PROTOCOL },
652 { "port", ICMP_UNREACH_PORT },
653 { "needfrag", ICMP_UNREACH_NEEDFRAG },
654 { "srcfail", ICMP_UNREACH_SRCFAIL },
655 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
656 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
657 { "isolated", ICMP_UNREACH_ISOLATED },
658 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
659 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
660 { "tosnet", ICMP_UNREACH_TOSNET },
661 { "toshost", ICMP_UNREACH_TOSHOST },
662 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
663 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
664 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
669 fill_reject_code(u_short *codep, char *str)
674 val = strtoul(str, &s, 0);
675 if (s == str || *s != '\0' || val >= 0x100)
676 val = match_token(icmpcodes, str);
678 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
684 print_reject_code(uint16_t code)
686 char const *s = match_value(icmpcodes, code);
689 printf("unreach %s", s);
691 printf("unreach %u", code);
695 * Returns the number of bits set (from left) in a contiguous bitmask,
696 * or -1 if the mask is not contiguous.
697 * XXX this needs a proper fix.
698 * This effectively works on masks in big-endian (network) format.
699 * when compiled on little endian architectures.
701 * First bit is bit 7 of the first byte -- note, for MAC addresses,
702 * the first bit on the wire is bit 0 of the first byte.
703 * len is the max length in bits.
706 contigmask(uint8_t *p, int len)
710 for (i=0; i<len ; i++)
711 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
713 for (n=i+1; n < len; n++)
714 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
715 return -1; /* mask not contiguous */
720 * print flags set/clear in the two bitmasks passed as parameters.
721 * There is a specialized check for f_tcpflags.
724 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
726 char const *comma = "";
728 uint8_t set = cmd->arg1 & 0xff;
729 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
731 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
736 printf(" %s ", name);
737 for (i=0; list[i].x != 0; i++) {
738 if (set & list[i].x) {
740 printf("%s%s", comma, list[i].s);
743 if (clear & list[i].x) {
745 printf("%s!%s", comma, list[i].s);
752 * Print the ip address contained in a command.
755 print_ip(ipfw_insn_ip *cmd, char const *s)
757 struct hostent *he = NULL;
758 uint32_t len = F_LEN((ipfw_insn *)cmd);
759 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
761 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
763 const char *arg = "<invalid>";
765 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
766 arg = match_value(rule_options, lookup_key[d]);
767 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
771 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
773 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
777 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
778 cmd->o.opcode == O_IP_DST_LOOKUP) {
779 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
780 if (len == F_INSN_SIZE(ipfw_insn_u32))
785 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
786 uint32_t x, *map = (uint32_t *)&(cmd->mask);
792 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
793 printf("%s/%d", inet_ntoa(cmd->addr),
794 contigmask((uint8_t *)&x, 32));
795 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
796 x &= 0xff; /* base */
798 * Print bits and ranges.
799 * Locate first bit set (i), then locate first bit unset (j).
800 * If we have 3+ consecutive bits set, then print them as a
801 * range, otherwise only print the initial bit and rescan.
803 for (i=0; i < cmd->o.arg1; i++)
804 if (map[i/32] & (1<<(i & 31))) {
805 for (j=i+1; j < cmd->o.arg1; j++)
806 if (!(map[ j/32] & (1<<(j & 31))))
808 printf("%c%d", comma, i+x);
809 if (j>i+2) { /* range has at least 3 elements */
810 printf("-%d", j-1+x);
819 * len == 2 indicates a single IP, whereas lists of 1 or more
820 * addr/mask pairs have len = (2n+1). We convert len to n so we
821 * use that to count the number of entries.
823 for (len = len / 2; len > 0; len--, a += 2) {
824 int mb = /* mask length */
825 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
826 32 : contigmask((uint8_t *)&(a[1]), 32);
827 if (mb == 32 && co.do_resolv)
828 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
829 if (he != NULL) /* resolved to name */
830 printf("%s", he->h_name);
831 else if (mb == 0) /* any */
833 else { /* numeric IP followed by some kind of mask */
834 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
836 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
846 * prints a MAC address/mask pair
849 print_mac(uint8_t *addr, uint8_t *mask)
851 int l = contigmask(mask, 48);
856 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
857 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
859 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
860 mask[0], mask[1], mask[2],
861 mask[3], mask[4], mask[5]);
868 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
877 type = strtoul(av, &av, 0);
879 if (*av != ',' && *av != '\0')
880 errx(EX_DATAERR, "invalid ICMP type");
883 errx(EX_DATAERR, "ICMP type out of range");
885 cmd->d[0] |= 1 << type;
887 cmd->o.opcode = O_ICMPTYPE;
888 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
892 print_icmptypes(ipfw_insn_u32 *cmd)
897 printf(" icmptypes");
898 for (i = 0; i < 32; i++) {
899 if ( (cmd->d[0] & (1 << (i))) == 0)
901 printf("%c%d", sep, i);
907 * show_ipfw() prints the body of an ipfw rule.
908 * Because the standard rule has at least proto src_ip dst_ip, we use
909 * a helper function to produce these entries if not provided explicitly.
910 * The first argument is the list of fields we have, the second is
911 * the list of fields we want to be printed.
913 * Special cases if we have provided a MAC header:
914 * + if the rule does not contain IP addresses/ports, do not print them;
915 * + if the rule does not contain an IP proto, print "all" instead of "ip";
917 * Once we have 'have_options', IP header fields are printed as options.
919 #define HAVE_PROTO 0x0001
920 #define HAVE_SRCIP 0x0002
921 #define HAVE_DSTIP 0x0004
922 #define HAVE_PROTO4 0x0008
923 #define HAVE_PROTO6 0x0010
924 #define HAVE_IP 0x0100
925 #define HAVE_OPTIONS 0x8000
928 show_prerequisites(int *flags, int want, int cmd __unused)
932 if ( (*flags & HAVE_IP) == HAVE_IP)
933 *flags |= HAVE_OPTIONS;
935 if ( !(*flags & HAVE_OPTIONS)) {
936 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
937 if ( (*flags & HAVE_PROTO4))
939 else if ( (*flags & HAVE_PROTO6))
944 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
946 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
953 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
955 static int twidth = 0;
957 ipfw_insn *cmd, *tagptr = NULL;
958 const char *comment = NULL; /* ptr to comment if we have one */
959 int proto = 0; /* default */
960 int flags = 0; /* prerequisites */
961 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
962 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
963 int or_block = 0; /* we are in an or block */
964 uint32_t set_disable;
966 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
968 if (set_disable & (1 << rule->set)) { /* disabled */
972 printf("# DISABLED ");
974 printf("%05u ", rule->rulenum);
976 if (pcwidth>0 || bcwidth>0)
978 /* Tcc relies on msvcrt.dll for printf, and
979 * it does not support ANSI %llu syntax
982 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
983 bcwidth, align_uint64(&rule->bcnt));
985 printf("%*I64u %*I64u ", pcwidth, align_uint64(&rule->pcnt),
986 bcwidth, align_uint64(&rule->bcnt));
989 printf("%10u ", rule->timestamp);
990 else if (co.do_time == 1) {
992 time_t t = (time_t)0;
995 strcpy(timestr, ctime(&t));
996 *strchr(timestr, '\n') = '\0';
997 twidth = strlen(timestr);
999 if (rule->timestamp) {
1000 t = _long_to_time(rule->timestamp);
1002 strcpy(timestr, ctime(&t));
1003 *strchr(timestr, '\n') = '\0';
1004 printf("%s ", timestr);
1006 printf("%*s", twidth, " ");
1011 printf("set %d ", rule->set);
1014 * print the optional "match probability"
1016 if (rule->cmd_len > 0) {
1018 if (cmd->opcode == O_PROB) {
1019 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1020 double d = 1.0 * p->d[0];
1022 d = (d / 0x7fffffff);
1023 printf("prob %f ", d);
1028 * first print actions
1030 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1031 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1032 switch(cmd->opcode) {
1034 printf("check-state");
1035 /* avoid printing anything else */
1036 flags = HAVE_PROTO | HAVE_SRCIP |
1037 HAVE_DSTIP | HAVE_IP;
1053 if (cmd->arg1 == ICMP_REJECT_RST)
1055 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1058 print_reject_code(cmd->arg1);
1062 if (cmd->arg1 == ICMP6_UNREACH_RST)
1065 print_unreach6_code(cmd->arg1);
1069 PRINT_UINT_ARG("skipto ", cmd->arg1);
1073 PRINT_UINT_ARG("pipe ", cmd->arg1);
1077 PRINT_UINT_ARG("queue ", cmd->arg1);
1081 PRINT_UINT_ARG("divert ", cmd->arg1);
1085 PRINT_UINT_ARG("tee ", cmd->arg1);
1089 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1093 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1098 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1100 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1101 printf("fwd tablearg");
1103 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1106 printf(",%d", s->sa.sin_port);
1110 case O_LOG: /* O_LOG is printed last */
1111 logptr = (ipfw_insn_log *)cmd;
1114 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1115 altqptr = (ipfw_insn_altq *)cmd;
1123 PRINT_UINT_ARG("nat ", cmd->arg1);
1127 PRINT_UINT_ARG("setfib ", cmd->arg1);
1135 printf("** unrecognized action %d len %d ",
1136 cmd->opcode, cmd->len);
1140 if (logptr->max_log > 0)
1141 printf(" log logamount %d", logptr->max_log);
1147 print_altq_cmd(altqptr);
1151 if (tagptr->len & F_NOT)
1152 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1154 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1158 * then print the body.
1160 for (l = rule->act_ofs, cmd = rule->cmd ;
1161 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1162 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1164 if (cmd->opcode == O_IP4) {
1165 flags |= HAVE_PROTO4;
1167 } else if (cmd->opcode == O_IP6) {
1168 flags |= HAVE_PROTO6;
1172 if (rule->_pad & 1) { /* empty rules before options */
1173 if (!co.do_compact) {
1174 show_prerequisites(&flags, HAVE_PROTO, 0);
1175 printf(" from any to any");
1177 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1178 HAVE_SRCIP | HAVE_DSTIP;
1181 if (co.comment_only)
1184 for (l = rule->act_ofs, cmd = rule->cmd ;
1185 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1187 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1189 if (co.comment_only) {
1190 if (cmd->opcode != O_NOP)
1192 printf(" // %s\n", (char *)(cmd + 1));
1196 show_prerequisites(&flags, 0, cmd->opcode);
1198 switch(cmd->opcode) {
1200 break; /* done already */
1203 break; /* no need to print anything here */
1206 case O_IP_SRC_LOOKUP:
1210 show_prerequisites(&flags, HAVE_PROTO, 0);
1211 if (!(flags & HAVE_SRCIP))
1213 if ((cmd->len & F_OR) && !or_block)
1215 print_ip((ipfw_insn_ip *)cmd,
1216 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1217 flags |= HAVE_SRCIP;
1221 case O_IP_DST_LOOKUP:
1225 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1226 if (!(flags & HAVE_DSTIP))
1228 if ((cmd->len & F_OR) && !or_block)
1230 print_ip((ipfw_insn_ip *)cmd,
1231 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1232 flags |= HAVE_DSTIP;
1236 case O_IP6_SRC_MASK:
1238 show_prerequisites(&flags, HAVE_PROTO, 0);
1239 if (!(flags & HAVE_SRCIP))
1241 if ((cmd->len & F_OR) && !or_block)
1243 print_ip6((ipfw_insn_ip6 *)cmd,
1244 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1245 flags |= HAVE_SRCIP | HAVE_PROTO;
1249 case O_IP6_DST_MASK:
1251 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1252 if (!(flags & HAVE_DSTIP))
1254 if ((cmd->len & F_OR) && !or_block)
1256 print_ip6((ipfw_insn_ip6 *)cmd,
1257 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1258 flags |= HAVE_DSTIP;
1262 print_flow6id( (ipfw_insn_u32 *) cmd );
1263 flags |= HAVE_OPTIONS;
1267 show_prerequisites(&flags,
1268 HAVE_PROTO | HAVE_SRCIP |
1269 HAVE_DSTIP | HAVE_IP, 0);
1271 show_prerequisites(&flags,
1272 HAVE_PROTO | HAVE_SRCIP, 0);
1273 if ((cmd->len & F_OR) && !or_block)
1275 if (cmd->len & F_NOT)
1277 print_newports((ipfw_insn_u16 *)cmd, proto,
1278 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1282 struct protoent *pe = NULL;
1284 if ((cmd->len & F_OR) && !or_block)
1286 if (cmd->len & F_NOT)
1289 pe = getprotobynumber(cmd->arg1);
1290 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1291 !(flags & HAVE_PROTO))
1292 show_prerequisites(&flags,
1293 HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1294 HAVE_DSTIP | HAVE_OPTIONS, 0);
1295 if (flags & HAVE_OPTIONS)
1298 printf(" %s", pe->p_name);
1300 printf(" %u", cmd->arg1);
1302 flags |= HAVE_PROTO;
1305 default: /*options ... */
1306 if (!(cmd->len & (F_OR|F_NOT)))
1307 if (((cmd->opcode == O_IP6) &&
1308 (flags & HAVE_PROTO6)) ||
1309 ((cmd->opcode == O_IP4) &&
1310 (flags & HAVE_PROTO4)))
1312 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP |
1313 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1314 if ((cmd->len & F_OR) && !or_block)
1316 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1318 switch(cmd->opcode) {
1320 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1323 print_mac(m->addr, m->mask);
1324 print_mac(m->addr + 6, m->mask + 6);
1329 print_newports((ipfw_insn_u16 *)cmd,
1330 IPPROTO_ETHERTYPE, cmd->opcode);
1339 printf(" fib %u", cmd->arg1 );
1343 printf(cmd->len & F_NOT ? " out" : " in");
1347 switch (cmd->arg1) {
1349 printf(" diverted");
1352 printf(" diverted-loopback");
1355 printf(" diverted-output");
1358 printf(" diverted-?<%u>", cmd->arg1);
1371 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1373 if (cmd->opcode == O_XMIT)
1375 else if (cmd->opcode == O_RECV)
1377 else /* if (cmd->opcode == O_VIA) */
1379 if (cmdif->name[0] == '\0')
1381 inet_ntoa(cmdif->p.ip));
1383 printf(" %s %s", s, cmdif->name);
1388 if (F_LEN(cmd) == 1)
1389 printf(" ipid %u", cmd->arg1 );
1391 print_newports((ipfw_insn_u16 *)cmd, 0,
1396 if (F_LEN(cmd) == 1)
1397 printf(" ipttl %u", cmd->arg1 );
1399 print_newports((ipfw_insn_u16 *)cmd, 0,
1404 printf(" ipver %u", cmd->arg1 );
1407 case O_IPPRECEDENCE:
1408 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1412 if (F_LEN(cmd) == 1)
1413 printf(" iplen %u", cmd->arg1 );
1415 print_newports((ipfw_insn_u16 *)cmd, 0,
1420 print_flags("ipoptions", cmd, f_ipopts);
1424 print_flags("iptos", cmd, f_iptos);
1428 print_icmptypes((ipfw_insn_u32 *)cmd);
1432 printf(" established");
1436 if (F_LEN(cmd) == 1)
1437 printf(" tcpdatalen %u", cmd->arg1 );
1439 print_newports((ipfw_insn_u16 *)cmd, 0,
1444 print_flags("tcpflags", cmd, f_tcpflags);
1448 print_flags("tcpoptions", cmd, f_tcpopts);
1452 printf(" tcpwin %d", ntohs(cmd->arg1));
1456 printf(" tcpack %d", ntohl(cmd32->d[0]));
1460 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1465 struct passwd *pwd = getpwuid(cmd32->d[0]);
1468 printf(" uid %s", pwd->pw_name);
1470 printf(" uid %u", cmd32->d[0]);
1476 struct group *grp = getgrgid(cmd32->d[0]);
1479 printf(" gid %s", grp->gr_name);
1481 printf(" gid %u", cmd32->d[0]);
1486 printf(" jail %d", cmd32->d[0]);
1490 printf(" verrevpath");
1494 printf(" versrcreach");
1498 printf(" antispoof");
1506 comment = (char *)(cmd + 1);
1510 printf(" keep-state");
1514 struct _s_x *p = limit_masks;
1515 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1516 uint8_t x = c->limit_mask;
1517 char const *comma = " ";
1520 for (; p->x != 0 ; p++)
1521 if ((x & p->x) == p->x) {
1523 printf("%s%s", comma, p->s);
1526 PRINT_UINT_ARG(" ", c->conn_limit);
1539 print_icmp6types((ipfw_insn_u32 *)cmd);
1543 print_ext6hdr( (ipfw_insn *) cmd );
1547 if (F_LEN(cmd) == 1)
1548 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1550 print_newports((ipfw_insn_u16 *)cmd, 0,
1555 printf(" [opcode %d len %d]",
1556 cmd->opcode, cmd->len);
1559 if (cmd->len & F_OR) {
1562 } else if (or_block) {
1567 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
1570 printf(" // %s", comment);
1575 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1577 struct protoent *pe;
1580 char buf[INET6_ADDRSTRLEN];
1582 if (!co.do_expired) {
1583 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1586 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1587 printf("%05d", rulenum);
1588 if (pcwidth>0 || bcwidth>0)
1590 /* Tcc relies on msvcrt.dll for printf, and
1591 * it does not support ANSI %llu syntax
1594 printf(" %*llu %*llu (%ds)", pcwidth,
1595 align_uint64(&d->pcnt), bcwidth,
1596 align_uint64(&d->bcnt), d->expire);
1598 /*printf(" %*I64u %*I64u (%ds)", pcwidth,
1599 align_uint64(&d->pcnt), bcwidth,
1600 align_uint64(&d->bcnt), d->expire);*/
1602 //XXX workaround here, for multiple I64 on the same printf
1603 printf(" %*I64u",pcwidth,align_uint64(&d->pcnt));
1604 printf(" %*I64u",bcwidth,align_uint64(&d->bcnt));
1605 printf(" (%ds)",d->expire);
1607 switch (d->dyn_type) {
1608 case O_LIMIT_PARENT:
1609 printf(" PARENT %d", d->count);
1614 case O_KEEP_STATE: /* bidir, no mask */
1619 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1620 printf(" %s", pe->p_name);
1622 printf(" proto %u", d->id.proto);
1624 if (d->id.addr_type == 4) {
1625 a.s_addr = htonl(d->id.src_ip);
1626 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1628 a.s_addr = htonl(d->id.dst_ip);
1629 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1630 } else if (d->id.addr_type == 6) {
1631 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1632 sizeof(buf)), d->id.src_port);
1633 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1634 sizeof(buf)), d->id.dst_port);
1636 printf(" UNKNOWN <-> UNKNOWN\n");
1642 * This one handles all set-related commands
1643 * ipfw set { show | enable | disable }
1645 * ipfw set move X to Y
1646 * ipfw set move rule X to Y
1649 ipfw_sets_handler(char *av[])
1651 uint32_t set_disable, masks[2];
1654 uint8_t cmd, new_set;
1659 errx(EX_USAGE, "set needs command");
1660 if (_substrcmp(*av, "show") == 0) {
1665 nalloc = nbytes = sizeof(struct ip_fw);
1666 while (nbytes >= nalloc) {
1669 nalloc = nalloc * 2 + 200;
1671 data = safe_calloc(1, nbytes);
1672 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1673 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1676 bcopy(&((struct ip_fw *)data)->next_rule,
1677 &set_disable, sizeof(set_disable));
1679 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1680 if ((set_disable & (1<<i))) {
1681 printf("%s %d", msg, i);
1684 msg = (set_disable) ? " enable" : "enable";
1685 for (i = 0; i < RESVD_SET; i++)
1686 if (!(set_disable & (1<<i))) {
1687 printf("%s %d", msg, i);
1691 } else if (_substrcmp(*av, "swap") == 0) {
1693 if ( av[0] == NULL || av[1] == NULL )
1694 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1695 rulenum = atoi(av[0]);
1696 new_set = atoi(av[1]);
1697 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1698 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1699 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1700 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1701 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1702 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1703 } else if (_substrcmp(*av, "move") == 0) {
1705 if (av[0] && _substrcmp(*av, "rule") == 0) {
1710 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1711 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1712 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1713 rulenum = atoi(av[0]);
1714 new_set = atoi(av[2]);
1715 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1716 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1717 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1718 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1719 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1720 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1721 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1722 } else if (_substrcmp(*av, "disable") == 0 ||
1723 _substrcmp(*av, "enable") == 0 ) {
1724 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1727 masks[0] = masks[1] = 0;
1730 if (isdigit(**av)) {
1732 if (i < 0 || i > RESVD_SET)
1734 "invalid set number %d\n", i);
1735 masks[which] |= (1<<i);
1736 } else if (_substrcmp(*av, "disable") == 0)
1738 else if (_substrcmp(*av, "enable") == 0)
1742 "invalid set command %s\n", *av);
1745 if ( (masks[0] & masks[1]) != 0 )
1747 "cannot enable and disable the same set\n");
1749 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1751 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1753 errx(EX_USAGE, "invalid set command %s\n", *av);
1757 ipfw_sysctl_handler(char *av[], int which)
1761 if (av[0] == NULL) {
1762 warnx("missing keyword to enable/disable\n");
1763 } else if (_substrcmp(*av, "firewall") == 0) {
1764 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1765 &which, sizeof(which));
1766 } else if (_substrcmp(*av, "one_pass") == 0) {
1767 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1768 &which, sizeof(which));
1769 } else if (_substrcmp(*av, "debug") == 0) {
1770 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1771 &which, sizeof(which));
1772 } else if (_substrcmp(*av, "verbose") == 0) {
1773 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1774 &which, sizeof(which));
1775 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1776 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1777 &which, sizeof(which));
1779 } else if (_substrcmp(*av, "altq") == 0) {
1780 altq_set_enabled(which);
1783 warnx("unrecognize enable/disable keyword: %s\n", *av);
1788 ipfw_list(int ac, char *av[], int show_counters)
1791 ipfw_dyn_rule *dynrules, *d;
1793 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1796 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1797 int exitval = EX_OK;
1805 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1806 int nalloc = 1024; /* start somewhere... */
1811 fprintf(stderr, "Testing only, list disabled\n");
1815 dummynet_list(ac, av, show_counters);
1822 /* get rules or pipes from kernel, resizing array as necessary */
1825 while (nbytes >= nalloc) {
1826 nalloc = nalloc * 2 + 200;
1828 data = safe_realloc(data, nbytes);
1829 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1830 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1831 co.do_pipe ? "DUMMYNET" : "FW");
1835 * Count static rules. They have variable size so we
1836 * need to scan the list to count them.
1838 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1839 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1840 ++nstat, r = NEXT(r) )
1844 * Count dynamic rules. This is easier as they have
1848 dynrules = (ipfw_dyn_rule *)r ;
1849 n = (char *)r - (char *)data;
1850 ndyn = (nbytes - n) / sizeof *dynrules;
1852 /* if showing stats, figure out column widths ahead of time */
1853 bcwidth = pcwidth = 0;
1854 if (show_counters) {
1855 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1856 /* skip rules from another set */
1857 if (co.use_set && r->set != co.use_set - 1)
1860 /* packet counter */
1862 /* Tcc relies on msvcrt.dll for printf, and
1863 * it does not support ANSI %llu syntax
1866 width = snprintf(NULL, 0, "%llu", align_uint64(&r->pcnt));
1868 width = snprintf(NULL, 0, "%I64u", align_uint64(&r->pcnt));
1870 if (width > pcwidth)
1875 width = snprintf(NULL, 0, "%llu",align_uint64(&r->bcnt));
1877 width = snprintf(NULL, 0, "%I64u",align_uint64(&r->bcnt));
1879 if (width > bcwidth)
1883 if (co.do_dynamic && ndyn) {
1884 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1886 /* skip rules from another set */
1887 bcopy((char *)&d->rule + sizeof(uint16_t),
1888 &set, sizeof(uint8_t));
1889 if (set != co.use_set - 1)
1893 /* Tcc relies on msvcrt.dll for printf, and
1894 * it does not support ANSI %llu syntax
1897 width = snprintf(NULL, 0, "%llu",align_uint64(&d->pcnt));
1899 width = snprintf(NULL, 0, "%I64u",align_uint64(&d->pcnt));
1901 if (width > pcwidth)
1905 width = snprintf(NULL, 0, "%llu",align_uint64(&d->bcnt));
1907 width = snprintf(NULL, 0, "%I64u",align_uint64(&d->bcnt));
1909 if (width > bcwidth)
1913 /* if no rule numbers were specified, list all rules */
1915 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1916 if (co.use_set && r->set != co.use_set - 1)
1918 show_ipfw(r, pcwidth, bcwidth);
1921 if (co.do_dynamic && ndyn) {
1922 printf("## Dynamic rules (%d):\n", ndyn);
1923 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1925 bcopy((char *)&d->rule + sizeof(uint16_t),
1926 &set, sizeof(uint8_t));
1927 if (set != co.use_set - 1)
1930 show_dyn_ipfw(d, pcwidth, bcwidth);
1936 /* display specific rules requested on command line */
1938 for (lac = ac, lav = av; lac != 0; lac--) {
1939 /* convert command line rule # */
1940 last = rnum = strtoul(*lav++, &endptr, 10);
1942 last = strtoul(endptr+1, &endptr, 10);
1945 warnx("invalid rule number: %s", *(lav - 1));
1948 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1949 if (r->rulenum > last)
1951 if (co.use_set && r->set != co.use_set - 1)
1953 if (r->rulenum >= rnum && r->rulenum <= last) {
1954 show_ipfw(r, pcwidth, bcwidth);
1959 /* give precedence to other error(s) */
1960 if (exitval == EX_OK)
1961 exitval = EX_UNAVAILABLE;
1962 warnx("rule %lu does not exist", rnum);
1966 if (co.do_dynamic && ndyn) {
1967 printf("## Dynamic rules:\n");
1968 for (lac = ac, lav = av; lac != 0; lac--) {
1969 last = rnum = strtoul(*lav++, &endptr, 10);
1971 last = strtoul(endptr+1, &endptr, 10);
1973 /* already warned */
1975 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1978 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1982 bcopy((char *)&d->rule + sizeof(uint16_t),
1983 &set, sizeof(uint8_t));
1984 if (set != co.use_set - 1)
1987 if (r->rulenum >= rnum && r->rulenum <= last)
1988 show_dyn_ipfw(d, pcwidth, bcwidth);
1998 if (exitval != EX_OK)
2004 lookup_host (char *host, struct in_addr *ipaddr)
2008 if (!inet_aton(host, ipaddr)) {
2009 if ((he = gethostbyname(host)) == NULL)
2011 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2017 * fills the addr and mask fields in the instruction as appropriate from av.
2018 * Update length as appropriate.
2019 * The following formats are allowed:
2020 * me returns O_IP_*_ME
2021 * 1.2.3.4 single IP address
2022 * 1.2.3.4:5.6.7.8 address:mask
2023 * 1.2.3.4/24 address/mask
2024 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
2025 * We can have multiple comma-separated address/mask entries.
2028 fill_ip(ipfw_insn_ip *cmd, char *av)
2031 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2033 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2035 if (_substrcmp(av, "any") == 0)
2038 if (_substrcmp(av, "me") == 0) {
2039 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2043 if (strncmp(av, "table(", 6) == 0) {
2044 char *p = strchr(av + 6, ',');
2048 cmd->o.opcode = O_IP_DST_LOOKUP;
2049 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2051 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2052 d[0] = strtoul(p, NULL, 0);
2054 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2060 * After the address we can have '/' or ':' indicating a mask,
2061 * ',' indicating another address follows, '{' indicating a
2062 * set of addresses of unspecified size.
2064 char *t = NULL, *p = strpbrk(av, "/:,{");
2071 if ((t = strpbrk(p, ",{")) != NULL) {
2078 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2079 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2082 if (!inet_aton(p, (struct in_addr *)&d[1]))
2083 errx(EX_DATAERR, "bad netmask ``%s''", p);
2088 d[1] = htonl(0); /* mask */
2089 else if (masklen > 32)
2090 errx(EX_DATAERR, "bad width ``%s''", p);
2092 d[1] = htonl(~0 << (32 - masklen));
2094 case '{': /* no mask, assume /24 and put back the '{' */
2095 d[1] = htonl(~0 << (32 - 24));
2099 case ',': /* single address plus continuation */
2102 case 0: /* initialization value */
2104 d[1] = htonl(~0); /* force /32 */
2107 d[0] &= d[1]; /* mask base address with mask */
2110 /* find next separator */
2112 p = strpbrk(p, ",{");
2113 if (p && *p == '{') {
2115 * We have a set of addresses. They are stored as follows:
2116 * arg1 is the set size (powers of 2, 2..256)
2117 * addr is the base address IN HOST FORMAT
2118 * mask.. is an array of arg1 bits (rounded up to
2119 * the next multiple of 32) with bits set
2120 * for each host in the map.
2122 uint32_t *map = (uint32_t *)&cmd->mask;
2124 int i = contigmask((uint8_t *)&(d[1]), 32);
2127 errx(EX_DATAERR, "address set cannot be in a list");
2128 if (i < 24 || i > 31)
2129 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2130 cmd->o.arg1 = 1<<(32-i); /* map length */
2131 d[0] = ntohl(d[0]); /* base addr in host format */
2132 cmd->o.opcode = O_IP_DST_SET; /* default */
2133 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2134 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2135 map[i] = 0; /* clear map */
2139 high = low + cmd->o.arg1 - 1;
2141 * Here, i stores the previous value when we specify a range
2142 * of addresses within a mask, e.g. 45-63. i = -1 means we
2143 * have no previous value.
2145 i = -1; /* previous value in a range */
2146 while (isdigit(*av)) {
2148 int a = strtol(av, &s, 0);
2150 if (s == av) { /* no parameter */
2152 errx(EX_DATAERR, "set not closed\n");
2154 errx(EX_DATAERR, "incomplete range %d-", i);
2157 if (a < low || a > high)
2158 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2161 if (i == -1) /* no previous in range */
2163 else { /* check that range is valid */
2165 errx(EX_DATAERR, "invalid range %d-%d",
2168 errx(EX_DATAERR, "double '-' in range");
2171 map[i/32] |= 1<<(i & 31);
2182 if (av) /* then *av must be a ',' */
2185 /* Check this entry */
2186 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2188 * 'any' turns the entire list into a NOP.
2189 * 'not any' never matches, so it is removed from the
2190 * list unless it is the only item, in which case we
2193 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2194 if (av == NULL && len == 0) /* only this entry */
2195 errx(EX_DATAERR, "not any never matches");
2197 /* else do nothing and skip this entry */
2200 /* A single IP can be stored in an optimized format */
2201 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2202 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2205 len += 2; /* two words... */
2208 if (len + 1 > F_LEN_MASK)
2209 errx(EX_DATAERR, "address list too long");
2210 cmd->o.len |= len+1;
2214 /* n2mask sets n bits of the mask */
2216 n2mask(struct in6_addr *mask, int n)
2218 static int minimask[9] =
2219 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2222 memset(mask, 0, sizeof(struct in6_addr));
2223 p = (u_char *) mask;
2224 for (; n > 0; p++, n -= 8) {
2235 * helper function to process a set of flags and set bits in the
2236 * appropriate masks.
2239 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2240 struct _s_x *flags, char *p)
2242 uint8_t set=0, clear=0;
2245 char *q; /* points to the separator */
2247 uint8_t *which; /* mask we are working on */
2257 val = match_token(flags, p);
2259 errx(EX_DATAERR, "invalid flag %s", p);
2260 *which |= (uint8_t)val;
2263 cmd->opcode = opcode;
2264 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2265 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2270 ipfw_delete(char *av[])
2274 int exitval = EX_OK;
2278 NEED1("missing rule specification");
2279 if ( *av && _substrcmp(*av, "set") == 0) {
2280 /* Do not allow using the following syntax:
2281 * ipfw set N delete set M
2284 errx(EX_DATAERR, "invalid syntax");
2285 do_set = 1; /* delete set */
2290 while (*av && isdigit(**av)) {
2291 i = atoi(*av); av++;
2293 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2295 exitval = EX_UNAVAILABLE;
2296 warn("rule %u not available", i);
2298 } else if (co.do_pipe) {
2299 exitval = ipfw_delete_pipe(co.do_pipe, i);
2302 rulenum = (i & 0xffff) | (5 << 24) |
2303 ((co.use_set - 1) << 16);
2305 rulenum = (i & 0xffff) | (do_set << 24);
2306 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2308 exitval = EX_UNAVAILABLE;
2309 warn("rule %u: setsockopt(IP_FW_DEL)",
2314 if (exitval != EX_OK)
2320 * fill the interface structure. We do not check the name as we can
2321 * create interfaces dynamically, so checking them at insert time
2322 * makes relatively little sense.
2323 * Interface names containing '*', '?', or '[' are assumed to be shell
2324 * patterns which match interfaces.
2327 fill_iface(ipfw_insn_if *cmd, char *arg)
2329 cmd->name[0] = '\0';
2330 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2332 /* Parse the interface or address */
2333 if (strcmp(arg, "any") == 0)
2334 cmd->o.len = 0; /* effectively ignore this command */
2335 else if (!isdigit(*arg)) {
2336 strlcpy(cmd->name, arg, sizeof(cmd->name));
2337 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2338 } else if (!inet_aton(arg, &cmd->p.ip))
2339 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2343 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2347 char *ap, *ptr, *optr;
2348 struct ether_addr *mac;
2349 const char *macset = "0123456789abcdefABCDEF:";
2351 if (strcmp(p, "any") == 0) {
2352 for (i = 0; i < ETHER_ADDR_LEN; i++)
2353 addr[i] = mask[i] = 0;
2357 optr = ptr = strdup(p);
2358 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2360 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2361 errx(EX_DATAERR, "Incorrect MAC address");
2362 bcopy(mac, addr, ETHER_ADDR_LEN);
2364 errx(EX_DATAERR, "Incorrect MAC address");
2366 if (ptr != NULL) { /* we have mask? */
2367 if (p[ptr - optr - 1] == '/') { /* mask len */
2368 long ml = strtol(ptr, &ap, 10);
2369 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2370 errx(EX_DATAERR, "Incorrect mask length");
2371 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2372 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2375 if (strspn(ptr, macset) != l ||
2376 (mac = ether_aton(ptr)) == NULL)
2377 errx(EX_DATAERR, "Incorrect mask");
2378 bcopy(mac, mask, ETHER_ADDR_LEN);
2380 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2381 for (i = 0; i < ETHER_ADDR_LEN; i++)
2384 for (i = 0; i < ETHER_ADDR_LEN; i++)
2391 * helper function, updates the pointer to cmd with the length
2392 * of the current command, and also cleans up the first word of
2393 * the new command in case it has been clobbered before.
2396 next_cmd(ipfw_insn *cmd)
2399 bzero(cmd, sizeof(*cmd));
2404 * Takes arguments and copies them into a comment
2407 fill_comment(ipfw_insn *cmd, char **av)
2410 char *p = (char *)(cmd + 1);
2412 cmd->opcode = O_NOP;
2413 cmd->len = (cmd->len & (F_NOT | F_OR));
2415 /* Compute length of comment string. */
2416 for (i = 0, l = 0; av[i] != NULL; i++)
2417 l += strlen(av[i]) + 1;
2422 "comment too long (max 80 chars)");
2424 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2425 for (i = 0; av[i] != NULL; i++) {
2434 * A function to fill simple commands of size 1.
2435 * Existing flags are preserved.
2438 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2440 cmd->opcode = opcode;
2441 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2446 * Fetch and add the MAC address and type, with masks. This generates one or
2447 * two microinstructions, and returns the pointer to the last one.
2450 add_mac(ipfw_insn *cmd, char *av[])
2454 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2455 errx(EX_DATAERR, "MAC dst src");
2457 cmd->opcode = O_MACADDR2;
2458 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2460 mac = (ipfw_insn_mac *)cmd;
2461 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2462 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2463 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2468 add_mactype(ipfw_insn *cmd, char *av)
2471 errx(EX_DATAERR, "missing MAC type");
2472 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2473 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2474 cmd->opcode = O_MAC_TYPE;
2481 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2483 struct protoent *pe;
2487 proto = strtol(av, &ep, 10);
2488 if (*ep != '\0' || proto <= 0) {
2489 if ((pe = getprotobyname(av)) == NULL)
2491 proto = pe->p_proto;
2494 fill_cmd(cmd, O_PROTO, 0, proto);
2500 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2502 u_char proto = IPPROTO_IP;
2504 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2505 ; /* do not set O_IP4 nor O_IP6 */
2506 else if (strcmp(av, "ip4") == 0)
2507 /* explicit "just IPv4" rule */
2508 fill_cmd(cmd, O_IP4, 0, 0);
2509 else if (strcmp(av, "ip6") == 0) {
2510 /* explicit "just IPv6" rule */
2511 proto = IPPROTO_IPV6;
2512 fill_cmd(cmd, O_IP6, 0, 0);
2514 return add_proto0(cmd, av, protop);
2521 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2523 u_char proto = IPPROTO_IP;
2525 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2526 ; /* do not set O_IP4 nor O_IP6 */
2527 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2528 /* explicit "just IPv4" rule */
2529 fill_cmd(cmd, O_IP4, 0, 0);
2530 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2531 /* explicit "just IPv6" rule */
2532 proto = IPPROTO_IPV6;
2533 fill_cmd(cmd, O_IP6, 0, 0);
2535 return add_proto0(cmd, av, protop);
2542 add_srcip(ipfw_insn *cmd, char *av)
2544 fill_ip((ipfw_insn_ip *)cmd, av);
2545 if (cmd->opcode == O_IP_DST_SET) /* set */
2546 cmd->opcode = O_IP_SRC_SET;
2547 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2548 cmd->opcode = O_IP_SRC_LOOKUP;
2549 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2550 cmd->opcode = O_IP_SRC_ME;
2551 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2552 cmd->opcode = O_IP_SRC;
2553 else /* addr/mask */
2554 cmd->opcode = O_IP_SRC_MASK;
2559 add_dstip(ipfw_insn *cmd, char *av)
2561 fill_ip((ipfw_insn_ip *)cmd, av);
2562 if (cmd->opcode == O_IP_DST_SET) /* set */
2564 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2566 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2567 cmd->opcode = O_IP_DST_ME;
2568 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2569 cmd->opcode = O_IP_DST;
2570 else /* addr/mask */
2571 cmd->opcode = O_IP_DST_MASK;
2576 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2578 /* XXX "any" is trapped before. Perhaps "to" */
2579 if (_substrcmp(av, "any") == 0) {
2581 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2582 /* XXX todo: check that we have a protocol with ports */
2583 cmd->opcode = opcode;
2590 add_src(ipfw_insn *cmd, char *av, u_char proto)
2594 ipfw_insn *ret = NULL;
2596 if ((host = strdup(av)) == NULL)
2598 if ((ch = strrchr(host, '/')) != NULL)
2601 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2602 inet_pton(AF_INET6, host, &a) == 1)
2603 ret = add_srcip6(cmd, av);
2604 /* XXX: should check for IPv4, not !IPv6 */
2605 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2606 inet_pton(AF_INET6, host, &a) != 1))
2607 ret = add_srcip(cmd, av);
2608 if (ret == NULL && strcmp(av, "any") != 0)
2616 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2620 ipfw_insn *ret = NULL;
2622 if ((host = strdup(av)) == NULL)
2624 if ((ch = strrchr(host, '/')) != NULL)
2627 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2628 inet_pton(AF_INET6, host, &a) == 1)
2629 ret = add_dstip6(cmd, av);
2630 /* XXX: should check for IPv4, not !IPv6 */
2631 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2632 inet_pton(AF_INET6, host, &a) != 1))
2633 ret = add_dstip(cmd, av);
2634 if (ret == NULL && strcmp(av, "any") != 0)
2642 * Parse arguments and assemble the microinstructions which make up a rule.
2643 * Rules are added into the 'rulebuf' and then copied in the correct order
2644 * into the actual rule.
2646 * The syntax for a rule starts with the action, followed by
2647 * optional action parameters, and the various match patterns.
2648 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2649 * (generated if the rule includes a keep-state option), then the
2650 * various match patterns, log/altq actions, and the actual action.
2654 ipfw_add(char *av[])
2657 * rules are added into the 'rulebuf' and then copied in
2658 * the correct order into the actual rule.
2659 * Some things that need to go out of order (prob, action etc.)
2662 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2664 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2665 ipfw_insn *first_cmd; /* first match pattern */
2670 * various flags used to record that we entered some fields.
2672 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2673 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2678 int open_par = 0; /* open parenthesis ( */
2680 /* proto is here because it is used to fetch ports */
2681 u_char proto = IPPROTO_IP; /* default protocol */
2683 double match_prob = 1; /* match probability, default is always match */
2685 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2686 bzero(cmdbuf, sizeof(cmdbuf));
2687 bzero(rulebuf, sizeof(rulebuf));
2689 rule = (struct ip_fw *)rulebuf;
2690 cmd = (ipfw_insn *)cmdbuf;
2691 action = (ipfw_insn *)actbuf;
2695 /* [rule N] -- Rule number optional */
2696 if (av[0] && isdigit(**av)) {
2697 rule->rulenum = atoi(*av);
2701 /* [set N] -- set number (0..RESVD_SET), optional */
2702 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
2703 int set = strtoul(av[1], NULL, 10);
2704 if (set < 0 || set > RESVD_SET)
2705 errx(EX_DATAERR, "illegal set %s", av[1]);
2710 /* [prob D] -- match probability, optional */
2711 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2712 match_prob = strtod(av[1], NULL);
2714 if (match_prob <= 0 || match_prob > 1)
2715 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2719 /* action -- mandatory */
2720 NEED1("missing action");
2721 i = match_token(rule_actions, *av);
2723 action->len = 1; /* default */
2725 case TOK_CHECKSTATE:
2726 have_state = action;
2727 action->opcode = O_CHECK_STATE;
2731 action->opcode = O_ACCEPT;
2735 action->opcode = O_DENY;
2740 action->opcode = O_REJECT;
2741 action->arg1 = ICMP_UNREACH_HOST;
2745 action->opcode = O_REJECT;
2746 action->arg1 = ICMP_REJECT_RST;
2750 action->opcode = O_UNREACH6;
2751 action->arg1 = ICMP6_UNREACH_RST;
2755 action->opcode = O_REJECT;
2756 NEED1("missing reject code");
2757 fill_reject_code(&action->arg1, *av);
2762 action->opcode = O_UNREACH6;
2763 NEED1("missing unreach code");
2764 fill_unreach6_code(&action->arg1, *av);
2769 action->opcode = O_COUNT;
2773 action->opcode = O_NAT;
2774 action->len = F_INSN_SIZE(ipfw_insn_nat);
2778 action->opcode = O_QUEUE;
2781 action->opcode = O_PIPE;
2784 action->opcode = O_SKIPTO;
2787 action->opcode = O_NETGRAPH;
2790 action->opcode = O_NGTEE;
2793 action->opcode = O_DIVERT;
2796 action->opcode = O_TEE;
2799 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2800 if (isdigit(**av)) {
2801 action->arg1 = strtoul(*av, NULL, 10);
2802 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2803 errx(EX_DATAERR, "illegal argument for %s",
2805 } else if (_substrcmp(*av, "tablearg") == 0) {
2806 action->arg1 = IP_FW_TABLEARG;
2807 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2810 s = getservbyname(av[0], "divert");
2812 action->arg1 = ntohs(s->s_port);
2814 errx(EX_DATAERR, "illegal divert/tee port");
2816 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2821 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2824 NEED1("missing forward address[:port]");
2826 action->opcode = O_FORWARD_IP;
2827 action->len = F_INSN_SIZE(ipfw_insn_sa);
2830 * In the kernel we assume AF_INET and use only
2831 * sin_port and sin_addr. Remember to set sin_len as
2832 * the routing code seems to use it too.
2834 p->sa.sin_family = AF_INET;
2835 p->sa.sin_len = sizeof(struct sockaddr_in);
2838 * locate the address-port separator (':' or ',')
2840 s = strchr(*av, ':');
2842 s = strchr(*av, ',');
2845 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2848 "illegal forwarding port ``%s''", s);
2849 p->sa.sin_port = (u_short)i;
2851 if (_substrcmp(*av, "tablearg") == 0)
2852 p->sa.sin_addr.s_addr = INADDR_ANY;
2854 lookup_host(*av, &(p->sa.sin_addr));
2859 /* pretend it is a 'count' rule followed by the comment */
2860 action->opcode = O_COUNT;
2861 av--; /* go back... */
2867 size_t intsize = sizeof(int);
2869 action->opcode = O_SETFIB;
2870 NEED1("missing fib number");
2871 action->arg1 = strtoul(*av, NULL, 10);
2872 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
2873 errx(EX_DATAERR, "fibs not suported.\n");
2874 if (action->arg1 >= numfibs) /* Temporary */
2875 errx(EX_DATAERR, "fib too large.\n");
2881 action->opcode = O_REASS;
2885 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2887 action = next_cmd(action);
2890 * [altq queuename] -- altq tag, optional
2891 * [log [logamount N]] -- log, optional
2893 * If they exist, it go first in the cmdbuf, but then it is
2894 * skipped in the copy section to the end of the buffer.
2896 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
2901 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2906 "log cannot be specified more than once");
2907 have_log = (ipfw_insn *)c;
2908 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2909 cmd->opcode = O_LOG;
2910 if (av[0] && _substrcmp(*av, "logamount") == 0) {
2912 NEED1("logamount requires argument");
2916 "logamount must be positive");
2920 len = sizeof(c->max_log);
2921 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
2922 &c->max_log, &len, NULL, 0) == -1)
2923 errx(1, "sysctlbyname(\"%s\")",
2924 "net.inet.ip.fw.verbose_limit");
2932 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
2934 NEED1("missing altq queue name");
2937 "altq cannot be specified more than once");
2938 have_altq = (ipfw_insn *)a;
2939 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
2940 cmd->opcode = O_ALTQ;
2941 a->qid = altq_name_to_qid(*av);
2952 errx(EX_USAGE, "tag and untag cannot be "
2953 "specified more than once");
2954 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
2955 rule_action_params);
2957 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
2965 cmd = next_cmd(cmd);
2968 if (have_state) /* must be a check-state, we are done */
2971 #define OR_START(target) \
2972 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
2974 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2977 if ( (av[0])[1] == '\0') { \
2988 strcmp(*av, ")") == 0 || \
2989 strcmp(*av, "}") == 0)) { \
2994 errx(EX_USAGE, "missing \")\"\n"); \
2998 if (av[0] && _substrcmp(*av, "not") == 0) { \
2999 if (cmd->len & F_NOT) \
3000 errx(EX_USAGE, "double \"not\" not allowed\n"); \
3001 cmd->len |= F_NOT; \
3005 #define OR_BLOCK(target) \
3006 if (av[0] && _substrcmp(*av, "or") == 0) { \
3007 if (prev == NULL || open_par == 0) \
3008 errx(EX_DATAERR, "invalid OR block"); \
3009 prev->len |= F_OR; \
3019 * MAC addresses, optional.
3020 * If we have this, we skip the part "proto from src to dst"
3021 * and jump straight to the option parsing.
3024 NEED1("missing protocol");
3025 if (_substrcmp(*av, "MAC") == 0 ||
3026 _substrcmp(*av, "mac") == 0) {
3027 av++; /* the "MAC" keyword */
3028 add_mac(cmd, av); /* exits in case of errors */
3029 cmd = next_cmd(cmd);
3030 av += 2; /* dst-mac and src-mac */
3032 NEED1("missing mac type");
3033 if (add_mactype(cmd, av[0]))
3034 cmd = next_cmd(cmd);
3035 av++; /* any or mac-type */
3041 * protocol, mandatory
3043 OR_START(get_proto);
3045 NEED1("missing protocol");
3046 if (add_proto_compat(cmd, *av, &proto)) {
3048 if (F_LEN(cmd) != 0) {
3050 cmd = next_cmd(cmd);
3052 } else if (first_cmd != cmd) {
3053 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3056 OR_BLOCK(get_proto);
3061 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3062 errx(EX_USAGE, "missing ``from''");
3066 * source IP, mandatory
3068 OR_START(source_ip);
3069 NOT_BLOCK; /* optional "not" */
3070 NEED1("missing source address");
3071 if (add_src(cmd, *av, proto)) {
3073 if (F_LEN(cmd) != 0) { /* ! any */
3075 cmd = next_cmd(cmd);
3078 errx(EX_USAGE, "bad source address %s", *av);
3079 OR_BLOCK(source_ip);
3082 * source ports, optional
3084 NOT_BLOCK; /* optional "not" */
3085 if ( av[0] != NULL ) {
3086 if (_substrcmp(*av, "any") == 0 ||
3087 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3089 if (F_LEN(cmd) != 0)
3090 cmd = next_cmd(cmd);
3097 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3098 errx(EX_USAGE, "missing ``to''");
3102 * destination, mandatory
3105 NOT_BLOCK; /* optional "not" */
3106 NEED1("missing dst address");
3107 if (add_dst(cmd, *av, proto)) {
3109 if (F_LEN(cmd) != 0) { /* ! any */
3111 cmd = next_cmd(cmd);
3114 errx( EX_USAGE, "bad destination address %s", *av);
3118 * dest. ports, optional
3120 NOT_BLOCK; /* optional "not" */
3122 if (_substrcmp(*av, "any") == 0 ||
3123 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3125 if (F_LEN(cmd) != 0)
3126 cmd = next_cmd(cmd);
3131 if (av[0] && first_cmd == cmd) {
3133 * nothing specified so far, store in the rule to ease
3139 while ( av[0] != NULL ) {
3141 ipfw_insn_u32 *cmd32; /* alias for cmd */
3144 cmd32 = (ipfw_insn_u32 *)cmd;
3146 if (*s == '!') { /* alternate syntax for NOT */
3147 if (cmd->len & F_NOT)
3148 errx(EX_USAGE, "double \"not\" not allowed\n");
3152 i = match_token(rule_options, s);
3156 if (cmd->len & F_NOT)
3157 errx(EX_USAGE, "double \"not\" not allowed\n");
3162 if (open_par == 0 || prev == NULL)
3163 errx(EX_USAGE, "invalid \"or\" block\n");
3167 case TOK_STARTBRACE:
3169 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3175 errx(EX_USAGE, "+missing \")\"\n");
3181 fill_cmd(cmd, O_IN, 0, 0);
3185 cmd->len ^= F_NOT; /* toggle F_NOT */
3186 fill_cmd(cmd, O_IN, 0, 0);
3190 fill_cmd(cmd, O_DIVERTED, 0, 3);
3193 case TOK_DIVERTEDLOOPBACK:
3194 fill_cmd(cmd, O_DIVERTED, 0, 1);
3197 case TOK_DIVERTEDOUTPUT:
3198 fill_cmd(cmd, O_DIVERTED, 0, 2);
3202 fill_cmd(cmd, O_FRAG, 0, 0);
3206 fill_cmd(cmd, O_LAYER2, 0, 0);
3212 NEED1("recv, xmit, via require interface name"
3214 fill_iface((ipfw_insn_if *)cmd, av[0]);
3216 if (F_LEN(cmd) == 0) /* not a valid address */
3219 cmd->opcode = O_XMIT;
3220 else if (i == TOK_RECV)
3221 cmd->opcode = O_RECV;
3222 else if (i == TOK_VIA)
3223 cmd->opcode = O_VIA;
3227 NEED1("icmptypes requires list of types");
3228 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3232 case TOK_ICMP6TYPES:
3233 NEED1("icmptypes requires list of types");
3234 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3239 NEED1("ipttl requires TTL");
3240 if (strpbrk(*av, "-,")) {
3241 if (!add_ports(cmd, *av, 0, O_IPTTL))
3242 errx(EX_DATAERR, "invalid ipttl %s", *av);
3244 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3249 NEED1("ipid requires id");
3250 if (strpbrk(*av, "-,")) {
3251 if (!add_ports(cmd, *av, 0, O_IPID))
3252 errx(EX_DATAERR, "invalid ipid %s", *av);
3254 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3259 NEED1("iplen requires length");
3260 if (strpbrk(*av, "-,")) {
3261 if (!add_ports(cmd, *av, 0, O_IPLEN))
3262 errx(EX_DATAERR, "invalid ip len %s", *av);
3264 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3269 NEED1("ipver requires version");
3270 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3274 case TOK_IPPRECEDENCE:
3275 NEED1("ipprecedence requires value");
3276 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3277 (strtoul(*av, NULL, 0) & 7) << 5);
3282 NEED1("missing argument for ipoptions");
3283 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3288 NEED1("missing argument for iptos");
3289 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3294 NEED1("uid requires argument");
3300 cmd->opcode = O_UID;
3301 uid = strtoul(*av, &end, 0);
3302 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3304 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3305 cmd32->d[0] = pwd->pw_uid;
3306 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3312 NEED1("gid requires argument");
3318 cmd->opcode = O_GID;
3319 gid = strtoul(*av, &end, 0);
3320 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3322 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3323 cmd32->d[0] = grp->gr_gid;
3324 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3330 NEED1("jail requires argument");
3335 cmd->opcode = O_JAIL;
3336 jid = (int)strtol(*av, &end, 0);
3337 if (jid < 0 || *end != '\0')
3338 errx(EX_DATAERR, "jail requires prison ID");
3339 cmd32->d[0] = (uint32_t)jid;
3340 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3346 fill_cmd(cmd, O_ESTAB, 0, 0);
3350 fill_cmd(cmd, O_TCPFLAGS, 0,
3351 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3354 case TOK_TCPDATALEN:
3355 NEED1("tcpdatalen requires length");
3356 if (strpbrk(*av, "-,")) {
3357 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3358 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3360 fill_cmd(cmd, O_TCPDATALEN, 0,
3361 strtoul(*av, NULL, 0));
3366 NEED1("missing argument for tcpoptions");
3367 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3373 NEED1("tcpseq/tcpack requires argument");
3374 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3375 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3376 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3381 NEED1("tcpwin requires length");
3382 fill_cmd(cmd, O_TCPWIN, 0,
3383 htons(strtoul(*av, NULL, 0)));
3388 NEED1("missing argument for tcpflags");
3389 cmd->opcode = O_TCPFLAGS;
3390 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3396 errx(EX_USAGE, "keep-state cannot be part "
3399 errx(EX_USAGE, "only one of keep-state "
3400 "and limit is allowed");
3402 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3406 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3411 "limit cannot be part of an or block");
3413 errx(EX_USAGE, "only one of keep-state and "
3414 "limit is allowed");
3417 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3418 cmd->opcode = O_LIMIT;
3419 c->limit_mask = c->conn_limit = 0;
3421 while ( av[0] != NULL ) {
3422 if ((val = match_token(limit_masks, *av)) <= 0)
3424 c->limit_mask |= val;
3428 if (c->limit_mask == 0)
3429 errx(EX_USAGE, "limit: missing limit mask");
3431 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3432 TOK_LIMIT, rule_options);
3439 NEED1("missing protocol");
3440 if (add_proto(cmd, *av, &proto)) {
3443 errx(EX_DATAERR, "invalid protocol ``%s''",
3448 NEED1("missing source IP");
3449 if (add_srcip(cmd, *av)) {
3455 NEED1("missing destination IP");
3456 if (add_dstip(cmd, *av)) {
3462 NEED1("missing source IP6");
3463 if (add_srcip6(cmd, *av)) {
3469 NEED1("missing destination IP6");
3470 if (add_dstip6(cmd, *av)) {
3476 NEED1("missing source port");
3477 if (_substrcmp(*av, "any") == 0 ||
3478 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3481 errx(EX_DATAERR, "invalid source port %s", *av);
3485 NEED1("missing destination port");
3486 if (_substrcmp(*av, "any") == 0 ||
3487 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3490 errx(EX_DATAERR, "invalid destination port %s",
3495 if (add_mac(cmd, av))
3500 NEED1("missing mac type");
3501 if (!add_mactype(cmd, *av))
3502 errx(EX_DATAERR, "invalid mac type %s", *av);
3506 case TOK_VERREVPATH:
3507 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3510 case TOK_VERSRCREACH:
3511 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3515 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3519 fill_cmd(cmd, O_IPSEC, 0, 0);
3523 fill_cmd(cmd, O_IP6, 0, 0);
3527 fill_cmd(cmd, O_IP4, 0, 0);
3531 fill_ext6hdr( cmd, *av );
3536 if (proto != IPPROTO_IPV6 )
3537 errx( EX_USAGE, "flow-id filter is active "
3538 "only for ipv6 protocol\n");
3539 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3544 fill_comment(cmd, av);
3549 if (av[0] && strpbrk(*av, "-,")) {
3550 if (!add_ports(cmd, *av, 0, O_TAGGED))
3551 errx(EX_DATAERR, "tagged: invalid tag"
3557 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3558 TOK_TAGGED, rule_options);
3559 fill_cmd(cmd, O_TAGGED, 0, tag);
3565 NEED1("fib requires fib number");
3566 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3571 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3575 if (!av[0] || !av[1])
3576 errx(EX_USAGE, "format: lookup argument tablenum");
3577 cmd->opcode = O_IP_DST_LOOKUP;
3578 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3579 i = match_token(rule_options, *av);
3580 for (j = 0; lookup_key[j] >= 0 ; j++) {
3581 if (i == lookup_key[j])
3584 if (lookup_key[j] <= 0)
3585 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3586 c->d[1] = j; // i converted to option
3588 cmd->arg1 = strtoul(*av, &p, 0);
3590 errx(EX_USAGE, "format: lookup argument tablenum");
3596 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3598 if (F_LEN(cmd) > 0) { /* prepare to advance */
3600 cmd = next_cmd(cmd);
3606 * Now copy stuff into the rule.
3607 * If we have a keep-state option, the first instruction
3608 * must be a PROBE_STATE (which is generated here).
3609 * If we have a LOG option, it was stored as the first command,
3610 * and now must be moved to the top of the action part.
3612 dst = (ipfw_insn *)rule->cmd;
3615 * First thing to write into the command stream is the match probability.
3617 if (match_prob != 1) { /* 1 means always match */
3618 dst->opcode = O_PROB;
3620 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3625 * generate O_PROBE_STATE if necessary
3627 if (have_state && have_state->opcode != O_CHECK_STATE) {
3628 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3629 dst = next_cmd(dst);
3632 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3633 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3636 switch (src->opcode) {
3644 bcopy(src, dst, i * sizeof(uint32_t));
3650 * put back the have_state command as last opcode
3652 if (have_state && have_state->opcode != O_CHECK_STATE) {
3653 i = F_LEN(have_state);
3654 bcopy(have_state, dst, i * sizeof(uint32_t));
3658 * start action section
3660 rule->act_ofs = dst - rule->cmd;
3662 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3664 i = F_LEN(have_log);
3665 bcopy(have_log, dst, i * sizeof(uint32_t));
3669 i = F_LEN(have_altq);
3670 bcopy(have_altq, dst, i * sizeof(uint32_t));
3674 i = F_LEN(have_tag);
3675 bcopy(have_tag, dst, i * sizeof(uint32_t));
3679 * copy all other actions
3681 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3683 bcopy(src, dst, i * sizeof(uint32_t));
3687 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3688 i = (char *)dst - (char *)rule;
3689 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3690 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3692 show_ipfw(rule, 0, 0);
3696 * clear the counters or the log counters.
3699 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3701 uint32_t arg, saved_arg;
3704 char const *name = optname ? "RESETLOG" : "ZERO";
3706 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3711 /* clear all entries */
3712 if (do_cmd(optname, NULL, 0) < 0)
3713 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3715 printf("%s.\n", optname == IP_FW_ZERO ?
3716 "Accounting cleared":"Logging counts reset");
3723 if (isdigit(**av)) {
3724 arg = strtonum(*av, 0, 0xffff, &errstr);
3727 "invalid rule number %s\n", *av);
3730 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3733 if (do_cmd(optname, &arg, sizeof(arg))) {
3734 warn("rule %u: setsockopt(IP_FW_%s)",
3736 failed = EX_UNAVAILABLE;
3737 } else if (!co.do_quiet)
3738 printf("Entry %d %s.\n", saved_arg,
3739 optname == IP_FW_ZERO ?
3740 "cleared" : "logging count reset");
3742 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3745 if (failed != EX_OK)
3750 ipfw_flush(int force)
3752 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3754 if (!force && !co.do_quiet) { /* need to ask user */
3757 printf("Are you sure? [yn] ");
3760 c = toupper(getc(stdin));
3761 while (c != '\n' && getc(stdin) != '\n')
3763 return; /* and do not flush */
3764 } while (c != 'Y' && c != 'N');
3766 if (c == 'N') /* user said no */
3773 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3775 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3776 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3777 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3778 } else if (do_cmd(cmd, NULL, 0) < 0)
3779 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3780 co.do_pipe ? "DUMMYNET" : "FW");
3782 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3786 static void table_list(ipfw_table_entry ent, int need_header);
3789 * This one handles all table-related commands
3790 * ipfw table N add addr[/masklen] [value]
3791 * ipfw table N delete addr[/masklen]
3792 * ipfw table {N | all} flush
3793 * ipfw table {N | all} list
3796 ipfw_table_handler(int ac, char *av[])
3798 ipfw_table_entry ent;
3804 uint32_t tables_max;
3806 len = sizeof(tables_max);
3807 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3809 #ifdef IPFW_TABLES_MAX
3810 warn("Warn: Failed to get the max tables number via sysctl. "
3811 "Using the compiled in defaults. \nThe reason was");
3812 tables_max = IPFW_TABLES_MAX;
3814 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
3819 if (ac && isdigit(**av)) {
3820 ent.tbl = atoi(*av);
3823 } else if (ac && _substrcmp(*av, "all") == 0) {
3828 errx(EX_USAGE, "table number or 'all' keyword required");
3829 if (ent.tbl >= tables_max)
3830 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3831 "value (%d)", tables_max - 1);
3832 NEED1("table needs command");
3833 if (is_all && _substrcmp(*av, "list") != 0
3834 && _substrcmp(*av, "flush") != 0)
3835 errx(EX_USAGE, "table number required");
3837 if (_substrcmp(*av, "add") == 0 ||
3838 _substrcmp(*av, "delete") == 0) {
3839 do_add = **av == 'a';
3842 errx(EX_USAGE, "IP address required");
3843 p = strchr(*av, '/');
3846 ent.masklen = atoi(p);
3847 if (ent.masklen > 32)
3848 errx(EX_DATAERR, "bad width ``%s''", p);
3851 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
3852 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3856 /* isdigit is a bit of a hack here.. */
3857 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
3858 ent.value = strtoul(*av, NULL, 0);
3860 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
3861 /* The value must be stored in host order *
3862 * so that the values < 65k can be distinguished */
3863 ent.value = ntohl(tval);
3865 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3870 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
3871 &ent, sizeof(ent)) < 0) {
3872 /* If running silent, don't bomb out on these errors. */
3873 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
3874 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
3875 do_add ? "ADD" : "DEL");
3876 /* In silent mode, react to a failed add by deleting */
3878 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
3879 if (do_cmd(IP_FW_TABLE_ADD,
3880 &ent, sizeof(ent)) < 0)
3882 "setsockopt(IP_FW_TABLE_ADD)");
3885 } else if (_substrcmp(*av, "flush") == 0) {
3886 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3888 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
3889 sizeof(ent.tbl)) < 0)
3890 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
3891 } while (++ent.tbl < a);
3892 } else if (_substrcmp(*av, "list") == 0) {
3893 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3895 table_list(ent, is_all);
3896 } while (++ent.tbl < a);
3898 errx(EX_USAGE, "invalid table command %s", *av);
3902 table_list(ipfw_table_entry ent, int need_header)
3910 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
3911 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
3913 /* If a is zero we have nothing to do, the table is empty. */
3917 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
3918 tbl = safe_calloc(1, l);
3920 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
3921 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
3922 if (tbl->cnt && need_header)
3923 printf("---table(%d)---\n", tbl->tbl);
3924 for (a = 0; a < tbl->cnt; a++) {
3926 tval = tbl->ent[a].value;
3927 if (co.do_value_as_ip) {
3929 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
3930 &tbl->ent[a].addr), 127);
3931 /* inet_ntoa expects network order */
3933 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
3934 inet_ntoa(*(struct in_addr *)&tval));
3936 printf("%s/%u %u\n",
3937 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
3938 tbl->ent[a].masklen, tval);