2 * Copyright (c) 2002-2003 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
12 * Redistribution in binary form may occur without any restrictions.
13 * Obviously, it would be nice if you gave credit where credit is due
14 * but requiring it would be too onerous.
16 * This software is provided ``AS IS'' without any warranties of any kind.
18 * NEW command line interface for IP firewall facility
23 #include <sys/types.h>
24 #include <sys/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 * Helper routine to print a possibly unaligned uint64_t on
319 * various platform. If width > 0, print the value with
320 * the desired width, followed by a space;
321 * otherwise, return the required width.
324 pr_u64(uint64_t *pd, int width)
327 #define U64_FMT "I64"
329 #define U64_FMT "llu"
332 unsigned long long d;
334 bcopy (pd, &u, sizeof(u));
337 printf("%*" U64_FMT " ", width, d) :
338 snprintf(NULL, 0, "%" U64_FMT, d) ;
343 safe_calloc(size_t number, size_t size)
345 void *ret = calloc(number, size);
348 err(EX_OSERR, "calloc");
353 safe_realloc(void *ptr, size_t size)
355 void *ret = realloc(ptr, size);
358 err(EX_OSERR, "realloc");
363 * conditionally runs the command.
364 * Selected options or negative -> getsockopt
367 do_cmd(int optname, void *optval, uintptr_t optlen)
369 static int s = -1; /* the socket */
376 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
378 err(EX_UNAVAILABLE, "socket");
380 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
381 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
382 optname == IP_FW_TABLE_GETSIZE ||
383 optname == IP_FW_NAT_GET_CONFIG ||
385 optname == IP_FW_NAT_GET_LOG) {
388 i = getsockopt(s, IPPROTO_IP, optname, optval,
389 (socklen_t *)optlen);
391 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
397 * match_token takes a table and a string, returns the value associated
398 * with the string (-1 in case of failure).
401 match_token(struct _s_x *table, char *string)
404 uint i = strlen(string);
406 for (pt = table ; i && pt->s != NULL ; pt++)
407 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
413 * match_value takes a table and a value, returns the string associated
414 * with the value (NULL in case of failure).
417 match_value(struct _s_x *p, int value)
419 for (; p->s != NULL; p++)
426 * _substrcmp takes two strings and returns 1 if they do not match,
427 * and 0 if they match exactly or the first string is a sub-string
428 * of the second. A warning is printed to stderr in the case that the
429 * first string is a sub-string of the second.
431 * This function will be removed in the future through the usual
432 * deprecation process.
435 _substrcmp(const char *str1, const char* str2)
438 if (strncmp(str1, str2, strlen(str1)) != 0)
441 if (strlen(str1) != strlen(str2))
442 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
448 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
449 * and 0 if they match exactly or the second string is a sub-string
450 * of the first. A warning is printed to stderr in the case that the
451 * first string does not match the third.
453 * This function exists to warn about the bizzare construction
454 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
455 * for "bytes". The problem is that in addition to accepting "by",
456 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
457 * other string beginning with "by".
459 * This function will be removed in the future through the usual
460 * deprecation process.
463 _substrcmp2(const char *str1, const char* str2, const char* str3)
466 if (strncmp(str1, str2, strlen(str2)) != 0)
469 if (strcmp(str1, str3) != 0)
470 warnx("DEPRECATED: '%s' matched '%s'",
476 * prints one port, symbolic or numeric
479 print_port(int proto, uint16_t port)
482 if (proto == IPPROTO_ETHERTYPE) {
485 if (co.do_resolv && (s = match_value(ether_types, port)) )
488 printf("0x%04x", port);
490 struct servent *se = NULL;
492 struct protoent *pe = getprotobynumber(proto);
494 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
497 printf("%s", se->s_name);
503 static struct _s_x _port_name[] = {
504 {"dst-port", O_IP_DSTPORT},
505 {"src-port", O_IP_SRCPORT},
509 {"mac-type", O_MAC_TYPE},
510 {"tcpdatalen", O_TCPDATALEN},
511 {"tagged", O_TAGGED},
516 * Print the values in a list 16-bit items of the types above.
517 * XXX todo: add support for mask.
520 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
522 uint16_t *p = cmd->ports;
527 sep = match_value(_port_name, opcode);
533 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
535 print_port(proto, p[0]);
538 print_port(proto, p[1]);
545 * Like strtol, but also translates service names into port numbers
546 * for some protocols.
548 * proto == -1 disables the protocol check;
549 * proto == IPPROTO_ETHERTYPE looks up an internal table
550 * proto == <some value in /etc/protocols> matches the values there.
551 * Returns *end == s in case the parameter is not found.
554 strtoport(char *s, char **end, int base, int proto)
560 *end = s; /* default - not found */
562 return 0; /* not found */
565 return strtol(s, end, base);
568 * find separator. '\\' escapes the next char.
570 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
571 if (*s1 == '\\' && s1[1] != '\0')
574 buf = safe_calloc(s1 - s + 1, 1);
577 * copy into a buffer skipping backslashes
579 for (p = s, i = 0; p != s1 ; p++)
584 if (proto == IPPROTO_ETHERTYPE) {
585 i = match_token(ether_types, buf);
587 if (i != -1) { /* found */
592 struct protoent *pe = NULL;
596 pe = getprotobynumber(proto);
598 se = getservbyname(buf, pe ? pe->p_name : NULL);
602 return ntohs(se->s_port);
605 return 0; /* not found */
609 * Fill the body of the command with the list of port ranges.
612 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
614 uint16_t a, b, *p = cmd->ports;
619 a = strtoport(av, &s, 0, proto);
620 if (s == av) /* empty or invalid argument */
624 case '-': /* a range */
626 b = strtoport(av, &s, 0, proto);
627 /* Reject expressions like '1-abc' or '1-2-3'. */
628 if (s == av || (*s != ',' && *s != '\0'))
633 case ',': /* comma separated list */
638 warnx("port list: invalid separator <%c> in <%s>",
648 if (i + 1 > F_LEN_MASK)
649 errx(EX_DATAERR, "too many ports/ranges\n");
650 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
655 static struct _s_x icmpcodes[] = {
656 { "net", ICMP_UNREACH_NET },
657 { "host", ICMP_UNREACH_HOST },
658 { "protocol", ICMP_UNREACH_PROTOCOL },
659 { "port", ICMP_UNREACH_PORT },
660 { "needfrag", ICMP_UNREACH_NEEDFRAG },
661 { "srcfail", ICMP_UNREACH_SRCFAIL },
662 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
663 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
664 { "isolated", ICMP_UNREACH_ISOLATED },
665 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
666 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
667 { "tosnet", ICMP_UNREACH_TOSNET },
668 { "toshost", ICMP_UNREACH_TOSHOST },
669 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
670 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
671 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
676 fill_reject_code(u_short *codep, char *str)
681 val = strtoul(str, &s, 0);
682 if (s == str || *s != '\0' || val >= 0x100)
683 val = match_token(icmpcodes, str);
685 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
691 print_reject_code(uint16_t code)
693 char const *s = match_value(icmpcodes, code);
696 printf("unreach %s", s);
698 printf("unreach %u", code);
702 * Returns the number of bits set (from left) in a contiguous bitmask,
703 * or -1 if the mask is not contiguous.
704 * XXX this needs a proper fix.
705 * This effectively works on masks in big-endian (network) format.
706 * when compiled on little endian architectures.
708 * First bit is bit 7 of the first byte -- note, for MAC addresses,
709 * the first bit on the wire is bit 0 of the first byte.
710 * len is the max length in bits.
713 contigmask(uint8_t *p, int len)
717 for (i=0; i<len ; i++)
718 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
720 for (n=i+1; n < len; n++)
721 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
722 return -1; /* mask not contiguous */
727 * print flags set/clear in the two bitmasks passed as parameters.
728 * There is a specialized check for f_tcpflags.
731 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
733 char const *comma = "";
735 uint8_t set = cmd->arg1 & 0xff;
736 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
738 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
743 printf(" %s ", name);
744 for (i=0; list[i].x != 0; i++) {
745 if (set & list[i].x) {
747 printf("%s%s", comma, list[i].s);
750 if (clear & list[i].x) {
752 printf("%s!%s", comma, list[i].s);
759 * Print the ip address contained in a command.
762 print_ip(ipfw_insn_ip *cmd, char const *s)
764 struct hostent *he = NULL;
765 uint32_t len = F_LEN((ipfw_insn *)cmd);
766 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
768 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
770 const char *arg = "<invalid>";
772 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
773 arg = match_value(rule_options, lookup_key[d]);
774 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
778 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
780 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
784 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
785 cmd->o.opcode == O_IP_DST_LOOKUP) {
786 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
787 if (len == F_INSN_SIZE(ipfw_insn_u32))
792 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
793 uint32_t x, *map = (uint32_t *)&(cmd->mask);
799 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
800 printf("%s/%d", inet_ntoa(cmd->addr),
801 contigmask((uint8_t *)&x, 32));
802 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
803 x &= 0xff; /* base */
805 * Print bits and ranges.
806 * Locate first bit set (i), then locate first bit unset (j).
807 * If we have 3+ consecutive bits set, then print them as a
808 * range, otherwise only print the initial bit and rescan.
810 for (i=0; i < cmd->o.arg1; i++)
811 if (map[i/32] & (1<<(i & 31))) {
812 for (j=i+1; j < cmd->o.arg1; j++)
813 if (!(map[ j/32] & (1<<(j & 31))))
815 printf("%c%d", comma, i+x);
816 if (j>i+2) { /* range has at least 3 elements */
817 printf("-%d", j-1+x);
826 * len == 2 indicates a single IP, whereas lists of 1 or more
827 * addr/mask pairs have len = (2n+1). We convert len to n so we
828 * use that to count the number of entries.
830 for (len = len / 2; len > 0; len--, a += 2) {
831 int mb = /* mask length */
832 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
833 32 : contigmask((uint8_t *)&(a[1]), 32);
834 if (mb == 32 && co.do_resolv)
835 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
836 if (he != NULL) /* resolved to name */
837 printf("%s", he->h_name);
838 else if (mb == 0) /* any */
840 else { /* numeric IP followed by some kind of mask */
841 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
843 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
853 * prints a MAC address/mask pair
856 print_mac(uint8_t *addr, uint8_t *mask)
858 int l = contigmask(mask, 48);
863 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
864 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
866 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
867 mask[0], mask[1], mask[2],
868 mask[3], mask[4], mask[5]);
875 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
884 type = strtoul(av, &av, 0);
886 if (*av != ',' && *av != '\0')
887 errx(EX_DATAERR, "invalid ICMP type");
890 errx(EX_DATAERR, "ICMP type out of range");
892 cmd->d[0] |= 1 << type;
894 cmd->o.opcode = O_ICMPTYPE;
895 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
899 print_icmptypes(ipfw_insn_u32 *cmd)
904 printf(" icmptypes");
905 for (i = 0; i < 32; i++) {
906 if ( (cmd->d[0] & (1 << (i))) == 0)
908 printf("%c%d", sep, i);
914 * show_ipfw() prints the body of an ipfw rule.
915 * Because the standard rule has at least proto src_ip dst_ip, we use
916 * a helper function to produce these entries if not provided explicitly.
917 * The first argument is the list of fields we have, the second is
918 * the list of fields we want to be printed.
920 * Special cases if we have provided a MAC header:
921 * + if the rule does not contain IP addresses/ports, do not print them;
922 * + if the rule does not contain an IP proto, print "all" instead of "ip";
924 * Once we have 'have_options', IP header fields are printed as options.
926 #define HAVE_PROTO 0x0001
927 #define HAVE_SRCIP 0x0002
928 #define HAVE_DSTIP 0x0004
929 #define HAVE_PROTO4 0x0008
930 #define HAVE_PROTO6 0x0010
931 #define HAVE_IP 0x0100
932 #define HAVE_OPTIONS 0x8000
935 show_prerequisites(int *flags, int want, int cmd __unused)
939 if ( (*flags & HAVE_IP) == HAVE_IP)
940 *flags |= HAVE_OPTIONS;
942 if ( !(*flags & HAVE_OPTIONS)) {
943 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
944 if ( (*flags & HAVE_PROTO4))
946 else if ( (*flags & HAVE_PROTO6))
951 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
953 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
960 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
962 static int twidth = 0;
964 ipfw_insn *cmd, *tagptr = NULL;
965 const char *comment = NULL; /* ptr to comment if we have one */
966 int proto = 0; /* default */
967 int flags = 0; /* prerequisites */
968 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
969 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
970 int or_block = 0; /* we are in an or block */
971 uint32_t set_disable;
973 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
975 if (set_disable & (1 << rule->set)) { /* disabled */
979 printf("# DISABLED ");
981 printf("%05u ", rule->rulenum);
983 if (pcwidth > 0 || bcwidth > 0) {
984 pr_u64(&rule->pcnt, pcwidth);
985 pr_u64(&rule->bcnt, bcwidth);
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 pr_u64(&d->pcnt, pcwidth);
1591 pr_u64(&d->bcnt, bcwidth);
1592 printf("(%ds)", d->expire);
1594 switch (d->dyn_type) {
1595 case O_LIMIT_PARENT:
1596 printf(" PARENT %d", d->count);
1601 case O_KEEP_STATE: /* bidir, no mask */
1606 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1607 printf(" %s", pe->p_name);
1609 printf(" proto %u", d->id.proto);
1611 if (d->id.addr_type == 4) {
1612 a.s_addr = htonl(d->id.src_ip);
1613 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1615 a.s_addr = htonl(d->id.dst_ip);
1616 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1617 } else if (d->id.addr_type == 6) {
1618 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1619 sizeof(buf)), d->id.src_port);
1620 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1621 sizeof(buf)), d->id.dst_port);
1623 printf(" UNKNOWN <-> UNKNOWN\n");
1629 * This one handles all set-related commands
1630 * ipfw set { show | enable | disable }
1632 * ipfw set move X to Y
1633 * ipfw set move rule X to Y
1636 ipfw_sets_handler(char *av[])
1638 uint32_t set_disable, masks[2];
1641 uint8_t cmd, new_set;
1646 errx(EX_USAGE, "set needs command");
1647 if (_substrcmp(*av, "show") == 0) {
1652 nalloc = nbytes = sizeof(struct ip_fw);
1653 while (nbytes >= nalloc) {
1656 nalloc = nalloc * 2 + 200;
1658 data = safe_calloc(1, nbytes);
1659 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1660 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1663 bcopy(&((struct ip_fw *)data)->next_rule,
1664 &set_disable, sizeof(set_disable));
1666 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1667 if ((set_disable & (1<<i))) {
1668 printf("%s %d", msg, i);
1671 msg = (set_disable) ? " enable" : "enable";
1672 for (i = 0; i < RESVD_SET; i++)
1673 if (!(set_disable & (1<<i))) {
1674 printf("%s %d", msg, i);
1678 } else if (_substrcmp(*av, "swap") == 0) {
1680 if ( av[0] == NULL || av[1] == NULL )
1681 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1682 rulenum = atoi(av[0]);
1683 new_set = atoi(av[1]);
1684 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1685 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1686 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1687 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1688 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1689 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1690 } else if (_substrcmp(*av, "move") == 0) {
1692 if (av[0] && _substrcmp(*av, "rule") == 0) {
1697 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1698 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1699 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1700 rulenum = atoi(av[0]);
1701 new_set = atoi(av[2]);
1702 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1703 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1704 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1705 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1706 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1707 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1708 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1709 } else if (_substrcmp(*av, "disable") == 0 ||
1710 _substrcmp(*av, "enable") == 0 ) {
1711 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1714 masks[0] = masks[1] = 0;
1717 if (isdigit(**av)) {
1719 if (i < 0 || i > RESVD_SET)
1721 "invalid set number %d\n", i);
1722 masks[which] |= (1<<i);
1723 } else if (_substrcmp(*av, "disable") == 0)
1725 else if (_substrcmp(*av, "enable") == 0)
1729 "invalid set command %s\n", *av);
1732 if ( (masks[0] & masks[1]) != 0 )
1734 "cannot enable and disable the same set\n");
1736 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1738 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1740 errx(EX_USAGE, "invalid set command %s\n", *av);
1744 ipfw_sysctl_handler(char *av[], int which)
1748 if (av[0] == NULL) {
1749 warnx("missing keyword to enable/disable\n");
1750 } else if (_substrcmp(*av, "firewall") == 0) {
1751 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1752 &which, sizeof(which));
1753 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
1754 &which, sizeof(which));
1755 } else if (_substrcmp(*av, "one_pass") == 0) {
1756 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1757 &which, sizeof(which));
1758 } else if (_substrcmp(*av, "debug") == 0) {
1759 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1760 &which, sizeof(which));
1761 } else if (_substrcmp(*av, "verbose") == 0) {
1762 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1763 &which, sizeof(which));
1764 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1765 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1766 &which, sizeof(which));
1768 } else if (_substrcmp(*av, "altq") == 0) {
1769 altq_set_enabled(which);
1772 warnx("unrecognize enable/disable keyword: %s\n", *av);
1777 ipfw_list(int ac, char *av[], int show_counters)
1780 ipfw_dyn_rule *dynrules, *d;
1782 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1785 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1786 int exitval = EX_OK;
1794 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1795 int nalloc = 1024; /* start somewhere... */
1800 fprintf(stderr, "Testing only, list disabled\n");
1804 dummynet_list(ac, av, show_counters);
1811 /* get rules or pipes from kernel, resizing array as necessary */
1814 while (nbytes >= nalloc) {
1815 nalloc = nalloc * 2 + 200;
1817 data = safe_realloc(data, nbytes);
1818 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1819 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1820 co.do_pipe ? "DUMMYNET" : "FW");
1824 * Count static rules. They have variable size so we
1825 * need to scan the list to count them.
1827 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1828 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1829 ++nstat, r = NEXT(r) )
1833 * Count dynamic rules. This is easier as they have
1837 dynrules = (ipfw_dyn_rule *)r ;
1838 n = (char *)r - (char *)data;
1839 ndyn = (nbytes - n) / sizeof *dynrules;
1841 /* if showing stats, figure out column widths ahead of time */
1842 bcwidth = pcwidth = 0;
1843 if (show_counters) {
1844 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1845 /* skip rules from another set */
1846 if (co.use_set && r->set != co.use_set - 1)
1849 /* packet counter */
1850 width = pr_u64(&r->pcnt, 0);
1851 if (width > pcwidth)
1855 width = pr_u64(&r->bcnt, 0);
1856 if (width > bcwidth)
1860 if (co.do_dynamic && ndyn) {
1861 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1863 /* skip rules from another set */
1864 bcopy((char *)&d->rule + sizeof(uint16_t),
1865 &set, sizeof(uint8_t));
1866 if (set != co.use_set - 1)
1869 width = pr_u64(&d->pcnt, 0);
1870 if (width > pcwidth)
1873 width = pr_u64(&d->bcnt, 0);
1874 if (width > bcwidth)
1878 /* if no rule numbers were specified, list all rules */
1880 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1881 if (co.use_set && r->set != co.use_set - 1)
1883 show_ipfw(r, pcwidth, bcwidth);
1886 if (co.do_dynamic && ndyn) {
1887 printf("## Dynamic rules (%d):\n", ndyn);
1888 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1890 bcopy((char *)&d->rule + sizeof(uint16_t),
1891 &set, sizeof(uint8_t));
1892 if (set != co.use_set - 1)
1895 show_dyn_ipfw(d, pcwidth, bcwidth);
1901 /* display specific rules requested on command line */
1903 for (lac = ac, lav = av; lac != 0; lac--) {
1904 /* convert command line rule # */
1905 last = rnum = strtoul(*lav++, &endptr, 10);
1907 last = strtoul(endptr+1, &endptr, 10);
1910 warnx("invalid rule number: %s", *(lav - 1));
1913 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1914 if (r->rulenum > last)
1916 if (co.use_set && r->set != co.use_set - 1)
1918 if (r->rulenum >= rnum && r->rulenum <= last) {
1919 show_ipfw(r, pcwidth, bcwidth);
1924 /* give precedence to other error(s) */
1925 if (exitval == EX_OK)
1926 exitval = EX_UNAVAILABLE;
1927 warnx("rule %lu does not exist", rnum);
1931 if (co.do_dynamic && ndyn) {
1932 printf("## Dynamic rules:\n");
1933 for (lac = ac, lav = av; lac != 0; lac--) {
1934 last = rnum = strtoul(*lav++, &endptr, 10);
1936 last = strtoul(endptr+1, &endptr, 10);
1938 /* already warned */
1940 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1943 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1947 bcopy((char *)&d->rule + sizeof(uint16_t),
1948 &set, sizeof(uint8_t));
1949 if (set != co.use_set - 1)
1952 if (r->rulenum >= rnum && r->rulenum <= last)
1953 show_dyn_ipfw(d, pcwidth, bcwidth);
1963 if (exitval != EX_OK)
1969 lookup_host (char *host, struct in_addr *ipaddr)
1973 if (!inet_aton(host, ipaddr)) {
1974 if ((he = gethostbyname(host)) == NULL)
1976 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1982 * fills the addr and mask fields in the instruction as appropriate from av.
1983 * Update length as appropriate.
1984 * The following formats are allowed:
1985 * me returns O_IP_*_ME
1986 * 1.2.3.4 single IP address
1987 * 1.2.3.4:5.6.7.8 address:mask
1988 * 1.2.3.4/24 address/mask
1989 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1990 * We can have multiple comma-separated address/mask entries.
1993 fill_ip(ipfw_insn_ip *cmd, char *av)
1996 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
1998 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2000 if (_substrcmp(av, "any") == 0)
2003 if (_substrcmp(av, "me") == 0) {
2004 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2008 if (strncmp(av, "table(", 6) == 0) {
2009 char *p = strchr(av + 6, ',');
2013 cmd->o.opcode = O_IP_DST_LOOKUP;
2014 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2016 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2017 d[0] = strtoul(p, NULL, 0);
2019 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2025 * After the address we can have '/' or ':' indicating a mask,
2026 * ',' indicating another address follows, '{' indicating a
2027 * set of addresses of unspecified size.
2029 char *t = NULL, *p = strpbrk(av, "/:,{");
2036 if ((t = strpbrk(p, ",{")) != NULL) {
2043 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2044 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2047 if (!inet_aton(p, (struct in_addr *)&d[1]))
2048 errx(EX_DATAERR, "bad netmask ``%s''", p);
2053 d[1] = htonl(0); /* mask */
2054 else if (masklen > 32)
2055 errx(EX_DATAERR, "bad width ``%s''", p);
2057 d[1] = htonl(~0 << (32 - masklen));
2059 case '{': /* no mask, assume /24 and put back the '{' */
2060 d[1] = htonl(~0 << (32 - 24));
2064 case ',': /* single address plus continuation */
2067 case 0: /* initialization value */
2069 d[1] = htonl(~0); /* force /32 */
2072 d[0] &= d[1]; /* mask base address with mask */
2075 /* find next separator */
2077 p = strpbrk(p, ",{");
2078 if (p && *p == '{') {
2080 * We have a set of addresses. They are stored as follows:
2081 * arg1 is the set size (powers of 2, 2..256)
2082 * addr is the base address IN HOST FORMAT
2083 * mask.. is an array of arg1 bits (rounded up to
2084 * the next multiple of 32) with bits set
2085 * for each host in the map.
2087 uint32_t *map = (uint32_t *)&cmd->mask;
2089 int i = contigmask((uint8_t *)&(d[1]), 32);
2092 errx(EX_DATAERR, "address set cannot be in a list");
2093 if (i < 24 || i > 31)
2094 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2095 cmd->o.arg1 = 1<<(32-i); /* map length */
2096 d[0] = ntohl(d[0]); /* base addr in host format */
2097 cmd->o.opcode = O_IP_DST_SET; /* default */
2098 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2099 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2100 map[i] = 0; /* clear map */
2104 high = low + cmd->o.arg1 - 1;
2106 * Here, i stores the previous value when we specify a range
2107 * of addresses within a mask, e.g. 45-63. i = -1 means we
2108 * have no previous value.
2110 i = -1; /* previous value in a range */
2111 while (isdigit(*av)) {
2113 int a = strtol(av, &s, 0);
2115 if (s == av) { /* no parameter */
2117 errx(EX_DATAERR, "set not closed\n");
2119 errx(EX_DATAERR, "incomplete range %d-", i);
2122 if (a < low || a > high)
2123 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2126 if (i == -1) /* no previous in range */
2128 else { /* check that range is valid */
2130 errx(EX_DATAERR, "invalid range %d-%d",
2133 errx(EX_DATAERR, "double '-' in range");
2136 map[i/32] |= 1<<(i & 31);
2147 if (av) /* then *av must be a ',' */
2150 /* Check this entry */
2151 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2153 * 'any' turns the entire list into a NOP.
2154 * 'not any' never matches, so it is removed from the
2155 * list unless it is the only item, in which case we
2158 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2159 if (av == NULL && len == 0) /* only this entry */
2160 errx(EX_DATAERR, "not any never matches");
2162 /* else do nothing and skip this entry */
2165 /* A single IP can be stored in an optimized format */
2166 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2167 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2170 len += 2; /* two words... */
2173 if (len + 1 > F_LEN_MASK)
2174 errx(EX_DATAERR, "address list too long");
2175 cmd->o.len |= len+1;
2179 /* n2mask sets n bits of the mask */
2181 n2mask(struct in6_addr *mask, int n)
2183 static int minimask[9] =
2184 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2187 memset(mask, 0, sizeof(struct in6_addr));
2188 p = (u_char *) mask;
2189 for (; n > 0; p++, n -= 8) {
2200 * helper function to process a set of flags and set bits in the
2201 * appropriate masks.
2204 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2205 struct _s_x *flags, char *p)
2207 uint8_t set=0, clear=0;
2210 char *q; /* points to the separator */
2212 uint8_t *which; /* mask we are working on */
2222 val = match_token(flags, p);
2224 errx(EX_DATAERR, "invalid flag %s", p);
2225 *which |= (uint8_t)val;
2228 cmd->opcode = opcode;
2229 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2230 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2235 ipfw_delete(char *av[])
2239 int exitval = EX_OK;
2243 NEED1("missing rule specification");
2244 if ( *av && _substrcmp(*av, "set") == 0) {
2245 /* Do not allow using the following syntax:
2246 * ipfw set N delete set M
2249 errx(EX_DATAERR, "invalid syntax");
2250 do_set = 1; /* delete set */
2255 while (*av && isdigit(**av)) {
2256 i = atoi(*av); av++;
2258 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2260 exitval = EX_UNAVAILABLE;
2261 warn("rule %u not available", i);
2263 } else if (co.do_pipe) {
2264 exitval = ipfw_delete_pipe(co.do_pipe, i);
2267 rulenum = (i & 0xffff) | (5 << 24) |
2268 ((co.use_set - 1) << 16);
2270 rulenum = (i & 0xffff) | (do_set << 24);
2271 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2273 exitval = EX_UNAVAILABLE;
2274 warn("rule %u: setsockopt(IP_FW_DEL)",
2279 if (exitval != EX_OK)
2285 * fill the interface structure. We do not check the name as we can
2286 * create interfaces dynamically, so checking them at insert time
2287 * makes relatively little sense.
2288 * Interface names containing '*', '?', or '[' are assumed to be shell
2289 * patterns which match interfaces.
2292 fill_iface(ipfw_insn_if *cmd, char *arg)
2294 cmd->name[0] = '\0';
2295 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2297 /* Parse the interface or address */
2298 if (strcmp(arg, "any") == 0)
2299 cmd->o.len = 0; /* effectively ignore this command */
2300 else if (!isdigit(*arg)) {
2301 strlcpy(cmd->name, arg, sizeof(cmd->name));
2302 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2303 } else if (!inet_aton(arg, &cmd->p.ip))
2304 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2308 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2312 char *ap, *ptr, *optr;
2313 struct ether_addr *mac;
2314 const char *macset = "0123456789abcdefABCDEF:";
2316 if (strcmp(p, "any") == 0) {
2317 for (i = 0; i < ETHER_ADDR_LEN; i++)
2318 addr[i] = mask[i] = 0;
2322 optr = ptr = strdup(p);
2323 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2325 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2326 errx(EX_DATAERR, "Incorrect MAC address");
2327 bcopy(mac, addr, ETHER_ADDR_LEN);
2329 errx(EX_DATAERR, "Incorrect MAC address");
2331 if (ptr != NULL) { /* we have mask? */
2332 if (p[ptr - optr - 1] == '/') { /* mask len */
2333 long ml = strtol(ptr, &ap, 10);
2334 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2335 errx(EX_DATAERR, "Incorrect mask length");
2336 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2337 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2340 if (strspn(ptr, macset) != l ||
2341 (mac = ether_aton(ptr)) == NULL)
2342 errx(EX_DATAERR, "Incorrect mask");
2343 bcopy(mac, mask, ETHER_ADDR_LEN);
2345 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2346 for (i = 0; i < ETHER_ADDR_LEN; i++)
2349 for (i = 0; i < ETHER_ADDR_LEN; i++)
2356 * helper function, updates the pointer to cmd with the length
2357 * of the current command, and also cleans up the first word of
2358 * the new command in case it has been clobbered before.
2361 next_cmd(ipfw_insn *cmd)
2364 bzero(cmd, sizeof(*cmd));
2369 * Takes arguments and copies them into a comment
2372 fill_comment(ipfw_insn *cmd, char **av)
2375 char *p = (char *)(cmd + 1);
2377 cmd->opcode = O_NOP;
2378 cmd->len = (cmd->len & (F_NOT | F_OR));
2380 /* Compute length of comment string. */
2381 for (i = 0, l = 0; av[i] != NULL; i++)
2382 l += strlen(av[i]) + 1;
2387 "comment too long (max 80 chars)");
2389 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2390 for (i = 0; av[i] != NULL; i++) {
2399 * A function to fill simple commands of size 1.
2400 * Existing flags are preserved.
2403 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2405 cmd->opcode = opcode;
2406 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2411 * Fetch and add the MAC address and type, with masks. This generates one or
2412 * two microinstructions, and returns the pointer to the last one.
2415 add_mac(ipfw_insn *cmd, char *av[])
2419 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2420 errx(EX_DATAERR, "MAC dst src");
2422 cmd->opcode = O_MACADDR2;
2423 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2425 mac = (ipfw_insn_mac *)cmd;
2426 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2427 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2428 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2433 add_mactype(ipfw_insn *cmd, char *av)
2436 errx(EX_DATAERR, "missing MAC type");
2437 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2438 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2439 cmd->opcode = O_MAC_TYPE;
2446 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2448 struct protoent *pe;
2452 proto = strtol(av, &ep, 10);
2453 if (*ep != '\0' || proto <= 0) {
2454 if ((pe = getprotobyname(av)) == NULL)
2456 proto = pe->p_proto;
2459 fill_cmd(cmd, O_PROTO, 0, proto);
2465 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2467 u_char proto = IPPROTO_IP;
2469 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2470 ; /* do not set O_IP4 nor O_IP6 */
2471 else if (strcmp(av, "ip4") == 0)
2472 /* explicit "just IPv4" rule */
2473 fill_cmd(cmd, O_IP4, 0, 0);
2474 else if (strcmp(av, "ip6") == 0) {
2475 /* explicit "just IPv6" rule */
2476 proto = IPPROTO_IPV6;
2477 fill_cmd(cmd, O_IP6, 0, 0);
2479 return add_proto0(cmd, av, protop);
2486 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2488 u_char proto = IPPROTO_IP;
2490 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2491 ; /* do not set O_IP4 nor O_IP6 */
2492 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2493 /* explicit "just IPv4" rule */
2494 fill_cmd(cmd, O_IP4, 0, 0);
2495 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2496 /* explicit "just IPv6" rule */
2497 proto = IPPROTO_IPV6;
2498 fill_cmd(cmd, O_IP6, 0, 0);
2500 return add_proto0(cmd, av, protop);
2507 add_srcip(ipfw_insn *cmd, char *av)
2509 fill_ip((ipfw_insn_ip *)cmd, av);
2510 if (cmd->opcode == O_IP_DST_SET) /* set */
2511 cmd->opcode = O_IP_SRC_SET;
2512 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2513 cmd->opcode = O_IP_SRC_LOOKUP;
2514 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2515 cmd->opcode = O_IP_SRC_ME;
2516 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2517 cmd->opcode = O_IP_SRC;
2518 else /* addr/mask */
2519 cmd->opcode = O_IP_SRC_MASK;
2524 add_dstip(ipfw_insn *cmd, char *av)
2526 fill_ip((ipfw_insn_ip *)cmd, av);
2527 if (cmd->opcode == O_IP_DST_SET) /* set */
2529 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2531 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2532 cmd->opcode = O_IP_DST_ME;
2533 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2534 cmd->opcode = O_IP_DST;
2535 else /* addr/mask */
2536 cmd->opcode = O_IP_DST_MASK;
2541 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2543 /* XXX "any" is trapped before. Perhaps "to" */
2544 if (_substrcmp(av, "any") == 0) {
2546 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2547 /* XXX todo: check that we have a protocol with ports */
2548 cmd->opcode = opcode;
2555 add_src(ipfw_insn *cmd, char *av, u_char proto)
2559 ipfw_insn *ret = NULL;
2561 if ((host = strdup(av)) == NULL)
2563 if ((ch = strrchr(host, '/')) != NULL)
2566 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2567 inet_pton(AF_INET6, host, &a) == 1)
2568 ret = add_srcip6(cmd, av);
2569 /* XXX: should check for IPv4, not !IPv6 */
2570 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2571 inet_pton(AF_INET6, host, &a) != 1))
2572 ret = add_srcip(cmd, av);
2573 if (ret == NULL && strcmp(av, "any") != 0)
2581 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2585 ipfw_insn *ret = NULL;
2587 if ((host = strdup(av)) == NULL)
2589 if ((ch = strrchr(host, '/')) != NULL)
2592 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2593 inet_pton(AF_INET6, host, &a) == 1)
2594 ret = add_dstip6(cmd, av);
2595 /* XXX: should check for IPv4, not !IPv6 */
2596 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2597 inet_pton(AF_INET6, host, &a) != 1))
2598 ret = add_dstip(cmd, av);
2599 if (ret == NULL && strcmp(av, "any") != 0)
2607 * Parse arguments and assemble the microinstructions which make up a rule.
2608 * Rules are added into the 'rulebuf' and then copied in the correct order
2609 * into the actual rule.
2611 * The syntax for a rule starts with the action, followed by
2612 * optional action parameters, and the various match patterns.
2613 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2614 * (generated if the rule includes a keep-state option), then the
2615 * various match patterns, log/altq actions, and the actual action.
2619 ipfw_add(char *av[])
2622 * rules are added into the 'rulebuf' and then copied in
2623 * the correct order into the actual rule.
2624 * Some things that need to go out of order (prob, action etc.)
2627 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2629 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2630 ipfw_insn *first_cmd; /* first match pattern */
2635 * various flags used to record that we entered some fields.
2637 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2638 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2643 int open_par = 0; /* open parenthesis ( */
2645 /* proto is here because it is used to fetch ports */
2646 u_char proto = IPPROTO_IP; /* default protocol */
2648 double match_prob = 1; /* match probability, default is always match */
2650 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2651 bzero(cmdbuf, sizeof(cmdbuf));
2652 bzero(rulebuf, sizeof(rulebuf));
2654 rule = (struct ip_fw *)rulebuf;
2655 cmd = (ipfw_insn *)cmdbuf;
2656 action = (ipfw_insn *)actbuf;
2660 /* [rule N] -- Rule number optional */
2661 if (av[0] && isdigit(**av)) {
2662 rule->rulenum = atoi(*av);
2666 /* [set N] -- set number (0..RESVD_SET), optional */
2667 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
2668 int set = strtoul(av[1], NULL, 10);
2669 if (set < 0 || set > RESVD_SET)
2670 errx(EX_DATAERR, "illegal set %s", av[1]);
2675 /* [prob D] -- match probability, optional */
2676 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2677 match_prob = strtod(av[1], NULL);
2679 if (match_prob <= 0 || match_prob > 1)
2680 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2684 /* action -- mandatory */
2685 NEED1("missing action");
2686 i = match_token(rule_actions, *av);
2688 action->len = 1; /* default */
2690 case TOK_CHECKSTATE:
2691 have_state = action;
2692 action->opcode = O_CHECK_STATE;
2696 action->opcode = O_ACCEPT;
2700 action->opcode = O_DENY;
2705 action->opcode = O_REJECT;
2706 action->arg1 = ICMP_UNREACH_HOST;
2710 action->opcode = O_REJECT;
2711 action->arg1 = ICMP_REJECT_RST;
2715 action->opcode = O_UNREACH6;
2716 action->arg1 = ICMP6_UNREACH_RST;
2720 action->opcode = O_REJECT;
2721 NEED1("missing reject code");
2722 fill_reject_code(&action->arg1, *av);
2727 action->opcode = O_UNREACH6;
2728 NEED1("missing unreach code");
2729 fill_unreach6_code(&action->arg1, *av);
2734 action->opcode = O_COUNT;
2738 action->opcode = O_NAT;
2739 action->len = F_INSN_SIZE(ipfw_insn_nat);
2743 action->opcode = O_QUEUE;
2746 action->opcode = O_PIPE;
2749 action->opcode = O_SKIPTO;
2752 action->opcode = O_NETGRAPH;
2755 action->opcode = O_NGTEE;
2758 action->opcode = O_DIVERT;
2761 action->opcode = O_TEE;
2764 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2765 if (isdigit(**av)) {
2766 action->arg1 = strtoul(*av, NULL, 10);
2767 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2768 errx(EX_DATAERR, "illegal argument for %s",
2770 } else if (_substrcmp(*av, "tablearg") == 0) {
2771 action->arg1 = IP_FW_TABLEARG;
2772 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2775 s = getservbyname(av[0], "divert");
2777 action->arg1 = ntohs(s->s_port);
2779 errx(EX_DATAERR, "illegal divert/tee port");
2781 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2786 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2789 NEED1("missing forward address[:port]");
2791 action->opcode = O_FORWARD_IP;
2792 action->len = F_INSN_SIZE(ipfw_insn_sa);
2795 * In the kernel we assume AF_INET and use only
2796 * sin_port and sin_addr. Remember to set sin_len as
2797 * the routing code seems to use it too.
2799 p->sa.sin_family = AF_INET;
2800 p->sa.sin_len = sizeof(struct sockaddr_in);
2803 * locate the address-port separator (':' or ',')
2805 s = strchr(*av, ':');
2807 s = strchr(*av, ',');
2810 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2813 "illegal forwarding port ``%s''", s);
2814 p->sa.sin_port = (u_short)i;
2816 if (_substrcmp(*av, "tablearg") == 0)
2817 p->sa.sin_addr.s_addr = INADDR_ANY;
2819 lookup_host(*av, &(p->sa.sin_addr));
2824 /* pretend it is a 'count' rule followed by the comment */
2825 action->opcode = O_COUNT;
2826 av--; /* go back... */
2832 size_t intsize = sizeof(int);
2834 action->opcode = O_SETFIB;
2835 NEED1("missing fib number");
2836 action->arg1 = strtoul(*av, NULL, 10);
2837 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
2838 errx(EX_DATAERR, "fibs not suported.\n");
2839 if (action->arg1 >= numfibs) /* Temporary */
2840 errx(EX_DATAERR, "fib too large.\n");
2846 action->opcode = O_REASS;
2850 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2852 action = next_cmd(action);
2855 * [altq queuename] -- altq tag, optional
2856 * [log [logamount N]] -- log, optional
2858 * If they exist, it go first in the cmdbuf, but then it is
2859 * skipped in the copy section to the end of the buffer.
2861 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
2866 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2871 "log cannot be specified more than once");
2872 have_log = (ipfw_insn *)c;
2873 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2874 cmd->opcode = O_LOG;
2875 if (av[0] && _substrcmp(*av, "logamount") == 0) {
2877 NEED1("logamount requires argument");
2881 "logamount must be positive");
2885 len = sizeof(c->max_log);
2886 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
2887 &c->max_log, &len, NULL, 0) == -1)
2888 errx(1, "sysctlbyname(\"%s\")",
2889 "net.inet.ip.fw.verbose_limit");
2897 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
2899 NEED1("missing altq queue name");
2902 "altq cannot be specified more than once");
2903 have_altq = (ipfw_insn *)a;
2904 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
2905 cmd->opcode = O_ALTQ;
2906 a->qid = altq_name_to_qid(*av);
2917 errx(EX_USAGE, "tag and untag cannot be "
2918 "specified more than once");
2919 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
2920 rule_action_params);
2922 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
2930 cmd = next_cmd(cmd);
2933 if (have_state) /* must be a check-state, we are done */
2936 #define OR_START(target) \
2937 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
2939 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2942 if ( (av[0])[1] == '\0') { \
2953 strcmp(*av, ")") == 0 || \
2954 strcmp(*av, "}") == 0)) { \
2959 errx(EX_USAGE, "missing \")\"\n"); \
2963 if (av[0] && _substrcmp(*av, "not") == 0) { \
2964 if (cmd->len & F_NOT) \
2965 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2966 cmd->len |= F_NOT; \
2970 #define OR_BLOCK(target) \
2971 if (av[0] && _substrcmp(*av, "or") == 0) { \
2972 if (prev == NULL || open_par == 0) \
2973 errx(EX_DATAERR, "invalid OR block"); \
2974 prev->len |= F_OR; \
2984 * MAC addresses, optional.
2985 * If we have this, we skip the part "proto from src to dst"
2986 * and jump straight to the option parsing.
2989 NEED1("missing protocol");
2990 if (_substrcmp(*av, "MAC") == 0 ||
2991 _substrcmp(*av, "mac") == 0) {
2992 av++; /* the "MAC" keyword */
2993 add_mac(cmd, av); /* exits in case of errors */
2994 cmd = next_cmd(cmd);
2995 av += 2; /* dst-mac and src-mac */
2997 NEED1("missing mac type");
2998 if (add_mactype(cmd, av[0]))
2999 cmd = next_cmd(cmd);
3000 av++; /* any or mac-type */
3006 * protocol, mandatory
3008 OR_START(get_proto);
3010 NEED1("missing protocol");
3011 if (add_proto_compat(cmd, *av, &proto)) {
3013 if (F_LEN(cmd) != 0) {
3015 cmd = next_cmd(cmd);
3017 } else if (first_cmd != cmd) {
3018 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3021 OR_BLOCK(get_proto);
3026 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3027 errx(EX_USAGE, "missing ``from''");
3031 * source IP, mandatory
3033 OR_START(source_ip);
3034 NOT_BLOCK; /* optional "not" */
3035 NEED1("missing source address");
3036 if (add_src(cmd, *av, proto)) {
3038 if (F_LEN(cmd) != 0) { /* ! any */
3040 cmd = next_cmd(cmd);
3043 errx(EX_USAGE, "bad source address %s", *av);
3044 OR_BLOCK(source_ip);
3047 * source ports, optional
3049 NOT_BLOCK; /* optional "not" */
3050 if ( av[0] != NULL ) {
3051 if (_substrcmp(*av, "any") == 0 ||
3052 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3054 if (F_LEN(cmd) != 0)
3055 cmd = next_cmd(cmd);
3062 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3063 errx(EX_USAGE, "missing ``to''");
3067 * destination, mandatory
3070 NOT_BLOCK; /* optional "not" */
3071 NEED1("missing dst address");
3072 if (add_dst(cmd, *av, proto)) {
3074 if (F_LEN(cmd) != 0) { /* ! any */
3076 cmd = next_cmd(cmd);
3079 errx( EX_USAGE, "bad destination address %s", *av);
3083 * dest. ports, optional
3085 NOT_BLOCK; /* optional "not" */
3087 if (_substrcmp(*av, "any") == 0 ||
3088 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3090 if (F_LEN(cmd) != 0)
3091 cmd = next_cmd(cmd);
3096 if (av[0] && first_cmd == cmd) {
3098 * nothing specified so far, store in the rule to ease
3104 while ( av[0] != NULL ) {
3106 ipfw_insn_u32 *cmd32; /* alias for cmd */
3109 cmd32 = (ipfw_insn_u32 *)cmd;
3111 if (*s == '!') { /* alternate syntax for NOT */
3112 if (cmd->len & F_NOT)
3113 errx(EX_USAGE, "double \"not\" not allowed\n");
3117 i = match_token(rule_options, s);
3121 if (cmd->len & F_NOT)
3122 errx(EX_USAGE, "double \"not\" not allowed\n");
3127 if (open_par == 0 || prev == NULL)
3128 errx(EX_USAGE, "invalid \"or\" block\n");
3132 case TOK_STARTBRACE:
3134 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3140 errx(EX_USAGE, "+missing \")\"\n");
3146 fill_cmd(cmd, O_IN, 0, 0);
3150 cmd->len ^= F_NOT; /* toggle F_NOT */
3151 fill_cmd(cmd, O_IN, 0, 0);
3155 fill_cmd(cmd, O_DIVERTED, 0, 3);
3158 case TOK_DIVERTEDLOOPBACK:
3159 fill_cmd(cmd, O_DIVERTED, 0, 1);
3162 case TOK_DIVERTEDOUTPUT:
3163 fill_cmd(cmd, O_DIVERTED, 0, 2);
3167 fill_cmd(cmd, O_FRAG, 0, 0);
3171 fill_cmd(cmd, O_LAYER2, 0, 0);
3177 NEED1("recv, xmit, via require interface name"
3179 fill_iface((ipfw_insn_if *)cmd, av[0]);
3181 if (F_LEN(cmd) == 0) /* not a valid address */
3184 cmd->opcode = O_XMIT;
3185 else if (i == TOK_RECV)
3186 cmd->opcode = O_RECV;
3187 else if (i == TOK_VIA)
3188 cmd->opcode = O_VIA;
3192 NEED1("icmptypes requires list of types");
3193 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3197 case TOK_ICMP6TYPES:
3198 NEED1("icmptypes requires list of types");
3199 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3204 NEED1("ipttl requires TTL");
3205 if (strpbrk(*av, "-,")) {
3206 if (!add_ports(cmd, *av, 0, O_IPTTL))
3207 errx(EX_DATAERR, "invalid ipttl %s", *av);
3209 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3214 NEED1("ipid requires id");
3215 if (strpbrk(*av, "-,")) {
3216 if (!add_ports(cmd, *av, 0, O_IPID))
3217 errx(EX_DATAERR, "invalid ipid %s", *av);
3219 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3224 NEED1("iplen requires length");
3225 if (strpbrk(*av, "-,")) {
3226 if (!add_ports(cmd, *av, 0, O_IPLEN))
3227 errx(EX_DATAERR, "invalid ip len %s", *av);
3229 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3234 NEED1("ipver requires version");
3235 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3239 case TOK_IPPRECEDENCE:
3240 NEED1("ipprecedence requires value");
3241 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3242 (strtoul(*av, NULL, 0) & 7) << 5);
3247 NEED1("missing argument for ipoptions");
3248 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3253 NEED1("missing argument for iptos");
3254 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3259 NEED1("uid requires argument");
3265 cmd->opcode = O_UID;
3266 uid = strtoul(*av, &end, 0);
3267 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3269 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3270 cmd32->d[0] = pwd->pw_uid;
3271 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3277 NEED1("gid requires argument");
3283 cmd->opcode = O_GID;
3284 gid = strtoul(*av, &end, 0);
3285 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3287 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3288 cmd32->d[0] = grp->gr_gid;
3289 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3295 NEED1("jail requires argument");
3300 cmd->opcode = O_JAIL;
3301 jid = (int)strtol(*av, &end, 0);
3302 if (jid < 0 || *end != '\0')
3303 errx(EX_DATAERR, "jail requires prison ID");
3304 cmd32->d[0] = (uint32_t)jid;
3305 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3311 fill_cmd(cmd, O_ESTAB, 0, 0);
3315 fill_cmd(cmd, O_TCPFLAGS, 0,
3316 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3319 case TOK_TCPDATALEN:
3320 NEED1("tcpdatalen requires length");
3321 if (strpbrk(*av, "-,")) {
3322 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3323 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3325 fill_cmd(cmd, O_TCPDATALEN, 0,
3326 strtoul(*av, NULL, 0));
3331 NEED1("missing argument for tcpoptions");
3332 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3338 NEED1("tcpseq/tcpack requires argument");
3339 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3340 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3341 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3346 NEED1("tcpwin requires length");
3347 fill_cmd(cmd, O_TCPWIN, 0,
3348 htons(strtoul(*av, NULL, 0)));
3353 NEED1("missing argument for tcpflags");
3354 cmd->opcode = O_TCPFLAGS;
3355 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3361 errx(EX_USAGE, "keep-state cannot be part "
3364 errx(EX_USAGE, "only one of keep-state "
3365 "and limit is allowed");
3367 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3371 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3376 "limit cannot be part of an or block");
3378 errx(EX_USAGE, "only one of keep-state and "
3379 "limit is allowed");
3382 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3383 cmd->opcode = O_LIMIT;
3384 c->limit_mask = c->conn_limit = 0;
3386 while ( av[0] != NULL ) {
3387 if ((val = match_token(limit_masks, *av)) <= 0)
3389 c->limit_mask |= val;
3393 if (c->limit_mask == 0)
3394 errx(EX_USAGE, "limit: missing limit mask");
3396 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3397 TOK_LIMIT, rule_options);
3404 NEED1("missing protocol");
3405 if (add_proto(cmd, *av, &proto)) {
3408 errx(EX_DATAERR, "invalid protocol ``%s''",
3413 NEED1("missing source IP");
3414 if (add_srcip(cmd, *av)) {
3420 NEED1("missing destination IP");
3421 if (add_dstip(cmd, *av)) {
3427 NEED1("missing source IP6");
3428 if (add_srcip6(cmd, *av)) {
3434 NEED1("missing destination IP6");
3435 if (add_dstip6(cmd, *av)) {
3441 NEED1("missing source port");
3442 if (_substrcmp(*av, "any") == 0 ||
3443 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3446 errx(EX_DATAERR, "invalid source port %s", *av);
3450 NEED1("missing destination port");
3451 if (_substrcmp(*av, "any") == 0 ||
3452 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3455 errx(EX_DATAERR, "invalid destination port %s",
3460 if (add_mac(cmd, av))
3465 NEED1("missing mac type");
3466 if (!add_mactype(cmd, *av))
3467 errx(EX_DATAERR, "invalid mac type %s", *av);
3471 case TOK_VERREVPATH:
3472 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3475 case TOK_VERSRCREACH:
3476 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3480 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3484 fill_cmd(cmd, O_IPSEC, 0, 0);
3488 fill_cmd(cmd, O_IP6, 0, 0);
3492 fill_cmd(cmd, O_IP4, 0, 0);
3496 fill_ext6hdr( cmd, *av );
3501 if (proto != IPPROTO_IPV6 )
3502 errx( EX_USAGE, "flow-id filter is active "
3503 "only for ipv6 protocol\n");
3504 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3509 fill_comment(cmd, av);
3514 if (av[0] && strpbrk(*av, "-,")) {
3515 if (!add_ports(cmd, *av, 0, O_TAGGED))
3516 errx(EX_DATAERR, "tagged: invalid tag"
3522 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3523 TOK_TAGGED, rule_options);
3524 fill_cmd(cmd, O_TAGGED, 0, tag);
3530 NEED1("fib requires fib number");
3531 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3536 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3540 if (!av[0] || !av[1])
3541 errx(EX_USAGE, "format: lookup argument tablenum");
3542 cmd->opcode = O_IP_DST_LOOKUP;
3543 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3544 i = match_token(rule_options, *av);
3545 for (j = 0; lookup_key[j] >= 0 ; j++) {
3546 if (i == lookup_key[j])
3549 if (lookup_key[j] <= 0)
3550 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3551 c->d[1] = j; // i converted to option
3553 cmd->arg1 = strtoul(*av, &p, 0);
3555 errx(EX_USAGE, "format: lookup argument tablenum");
3561 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3563 if (F_LEN(cmd) > 0) { /* prepare to advance */
3565 cmd = next_cmd(cmd);
3571 * Now copy stuff into the rule.
3572 * If we have a keep-state option, the first instruction
3573 * must be a PROBE_STATE (which is generated here).
3574 * If we have a LOG option, it was stored as the first command,
3575 * and now must be moved to the top of the action part.
3577 dst = (ipfw_insn *)rule->cmd;
3580 * First thing to write into the command stream is the match probability.
3582 if (match_prob != 1) { /* 1 means always match */
3583 dst->opcode = O_PROB;
3585 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3590 * generate O_PROBE_STATE if necessary
3592 if (have_state && have_state->opcode != O_CHECK_STATE) {
3593 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3594 dst = next_cmd(dst);
3597 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3598 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3601 switch (src->opcode) {
3609 bcopy(src, dst, i * sizeof(uint32_t));
3615 * put back the have_state command as last opcode
3617 if (have_state && have_state->opcode != O_CHECK_STATE) {
3618 i = F_LEN(have_state);
3619 bcopy(have_state, dst, i * sizeof(uint32_t));
3623 * start action section
3625 rule->act_ofs = dst - rule->cmd;
3627 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3629 i = F_LEN(have_log);
3630 bcopy(have_log, dst, i * sizeof(uint32_t));
3634 i = F_LEN(have_altq);
3635 bcopy(have_altq, dst, i * sizeof(uint32_t));
3639 i = F_LEN(have_tag);
3640 bcopy(have_tag, dst, i * sizeof(uint32_t));
3644 * copy all other actions
3646 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3648 bcopy(src, dst, i * sizeof(uint32_t));
3652 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3653 i = (char *)dst - (char *)rule;
3654 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3655 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3657 show_ipfw(rule, 0, 0);
3661 * clear the counters or the log counters.
3664 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3666 uint32_t arg, saved_arg;
3669 char const *name = optname ? "RESETLOG" : "ZERO";
3671 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3676 /* clear all entries */
3677 if (do_cmd(optname, NULL, 0) < 0)
3678 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3680 printf("%s.\n", optname == IP_FW_ZERO ?
3681 "Accounting cleared":"Logging counts reset");
3688 if (isdigit(**av)) {
3689 arg = strtonum(*av, 0, 0xffff, &errstr);
3692 "invalid rule number %s\n", *av);
3695 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3698 if (do_cmd(optname, &arg, sizeof(arg))) {
3699 warn("rule %u: setsockopt(IP_FW_%s)",
3701 failed = EX_UNAVAILABLE;
3702 } else if (!co.do_quiet)
3703 printf("Entry %d %s.\n", saved_arg,
3704 optname == IP_FW_ZERO ?
3705 "cleared" : "logging count reset");
3707 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3710 if (failed != EX_OK)
3715 ipfw_flush(int force)
3717 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3719 if (!force && !co.do_quiet) { /* need to ask user */
3722 printf("Are you sure? [yn] ");
3725 c = toupper(getc(stdin));
3726 while (c != '\n' && getc(stdin) != '\n')
3728 return; /* and do not flush */
3729 } while (c != 'Y' && c != 'N');
3731 if (c == 'N') /* user said no */
3738 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3740 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3741 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3742 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3743 } else if (do_cmd(cmd, NULL, 0) < 0)
3744 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3745 co.do_pipe ? "DUMMYNET" : "FW");
3747 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3751 static void table_list(ipfw_table_entry ent, int need_header);
3754 * This one handles all table-related commands
3755 * ipfw table N add addr[/masklen] [value]
3756 * ipfw table N delete addr[/masklen]
3757 * ipfw table {N | all} flush
3758 * ipfw table {N | all} list
3761 ipfw_table_handler(int ac, char *av[])
3763 ipfw_table_entry ent;
3769 uint32_t tables_max;
3771 len = sizeof(tables_max);
3772 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3774 #ifdef IPFW_TABLES_MAX
3775 warn("Warn: Failed to get the max tables number via sysctl. "
3776 "Using the compiled in defaults. \nThe reason was");
3777 tables_max = IPFW_TABLES_MAX;
3779 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
3784 if (ac && isdigit(**av)) {
3785 ent.tbl = atoi(*av);
3788 } else if (ac && _substrcmp(*av, "all") == 0) {
3793 errx(EX_USAGE, "table number or 'all' keyword required");
3794 if (ent.tbl >= tables_max)
3795 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3796 "value (%d)", tables_max - 1);
3797 NEED1("table needs command");
3798 if (is_all && _substrcmp(*av, "list") != 0
3799 && _substrcmp(*av, "flush") != 0)
3800 errx(EX_USAGE, "table number required");
3802 if (_substrcmp(*av, "add") == 0 ||
3803 _substrcmp(*av, "delete") == 0) {
3804 do_add = **av == 'a';
3807 errx(EX_USAGE, "IP address required");
3808 p = strchr(*av, '/');
3811 ent.masklen = atoi(p);
3812 if (ent.masklen > 32)
3813 errx(EX_DATAERR, "bad width ``%s''", p);
3816 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
3817 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3821 /* isdigit is a bit of a hack here.. */
3822 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
3823 ent.value = strtoul(*av, NULL, 0);
3825 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
3826 /* The value must be stored in host order *
3827 * so that the values < 65k can be distinguished */
3828 ent.value = ntohl(tval);
3830 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3835 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
3836 &ent, sizeof(ent)) < 0) {
3837 /* If running silent, don't bomb out on these errors. */
3838 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
3839 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
3840 do_add ? "ADD" : "DEL");
3841 /* In silent mode, react to a failed add by deleting */
3843 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
3844 if (do_cmd(IP_FW_TABLE_ADD,
3845 &ent, sizeof(ent)) < 0)
3847 "setsockopt(IP_FW_TABLE_ADD)");
3850 } else if (_substrcmp(*av, "flush") == 0) {
3851 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3853 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
3854 sizeof(ent.tbl)) < 0)
3855 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
3856 } while (++ent.tbl < a);
3857 } else if (_substrcmp(*av, "list") == 0) {
3858 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3860 table_list(ent, is_all);
3861 } while (++ent.tbl < a);
3863 errx(EX_USAGE, "invalid table command %s", *av);
3867 table_list(ipfw_table_entry ent, int need_header)
3875 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
3876 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
3878 /* If a is zero we have nothing to do, the table is empty. */
3882 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
3883 tbl = safe_calloc(1, l);
3885 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
3886 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
3887 if (tbl->cnt && need_header)
3888 printf("---table(%d)---\n", tbl->tbl);
3889 for (a = 0; a < tbl->cnt; a++) {
3891 tval = tbl->ent[a].value;
3892 if (co.do_value_as_ip) {
3894 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
3895 &tbl->ent[a].addr), 127);
3896 /* inet_ntoa expects network order */
3898 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
3899 inet_ntoa(*(struct in_addr *)&tval));
3901 printf("%s/%u %u\n",
3902 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
3903 tbl->ent[a].masklen, tval);