2 * Copyright (c) 2002-2003 Luigi Rizzo
3 * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
4 * Copyright (c) 1994 Ugen J.S.Antsilevich
6 * Idea and grammar partially left from:
7 * Copyright (c) 1993 Daniel Boulet
9 * Redistribution and use in source forms, with and without modification,
10 * are permitted provided that this entire comment appears intact.
12 * Redistribution in binary form may occur without any restrictions.
13 * Obviously, it would be nice if you gave credit where credit is due
14 * but requiring it would be too onerous.
16 * This software is provided ``AS IS'' without any warranties of any kind.
18 * NEW command line interface for IP firewall facility
20 * $FreeBSD: head/sbin/ipfw/ipfw2.c 206843 2010-04-19 15:11:45Z luigi $
23 #include <sys/types.h>
24 #include <sys/param.h>
25 #include <sys/socket.h>
26 #include <sys/sockio.h>
27 #include <sys/sysctl.h>
41 #include <time.h> /* ctime */
42 #include <timeconv.h> /* _long_to_time */
45 #include <stddef.h> /* offsetof */
47 #include <net/ethernet.h>
48 #include <net/if.h> /* only IFNAMSIZ */
49 #include <netinet/in.h>
50 #include <netinet/in_systm.h> /* only n_short, n_long */
51 #include <netinet/ip.h>
52 #include <netinet/ip_icmp.h>
53 #include <netinet/ip_fw.h>
54 #include <netinet/tcp.h>
55 #include <arpa/inet.h>
57 struct cmdline_opts co; /* global options */
59 int resvd_set_number = RESVD_SET;
64 #define s6_addr32 __u6_addr.__u6_addr32
67 #define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
69 errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
70 if (_substrcmp(*av, "tablearg") == 0) { \
71 arg = IP_FW_TABLEARG; \
79 _xval = strtol(*av, &end, 10); \
81 if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \
82 errx(EX_DATAERR, "%s: invalid argument: %s", \
83 match_value(s_x, tok), *av); \
85 if (errno == ERANGE || _xval < min || _xval > max) \
86 errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
87 match_value(s_x, tok), min, max, *av); \
89 if (_xval == IP_FW_TABLEARG) \
90 errx(EX_DATAERR, "%s: illegal argument value: %s", \
91 match_value(s_x, tok), *av); \
97 PRINT_UINT_ARG(const char *str, uint32_t arg)
101 if (arg == IP_FW_TABLEARG)
107 static struct _s_x f_tcpflags[] = {
118 static struct _s_x f_tcpopts[] = {
119 { "mss", IP_FW_TCPOPT_MSS },
120 { "maxseg", IP_FW_TCPOPT_MSS },
121 { "window", IP_FW_TCPOPT_WINDOW },
122 { "sack", IP_FW_TCPOPT_SACK },
123 { "ts", IP_FW_TCPOPT_TS },
124 { "timestamp", IP_FW_TCPOPT_TS },
125 { "cc", IP_FW_TCPOPT_CC },
131 * IP options span the range 0 to 255 so we need to remap them
132 * (though in fact only the low 5 bits are significant).
134 static struct _s_x f_ipopts[] = {
135 { "ssrr", IP_FW_IPOPT_SSRR},
136 { "lsrr", IP_FW_IPOPT_LSRR},
137 { "rr", IP_FW_IPOPT_RR},
138 { "ts", IP_FW_IPOPT_TS},
143 static struct _s_x f_iptos[] = {
144 { "lowdelay", IPTOS_LOWDELAY},
145 { "throughput", IPTOS_THROUGHPUT},
146 { "reliability", IPTOS_RELIABILITY},
147 { "mincost", IPTOS_MINCOST},
148 { "congestion", IPTOS_ECN_CE},
149 { "ecntransport", IPTOS_ECN_ECT0},
150 { "ip tos option", 0},
154 static struct _s_x limit_masks[] = {
155 {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
156 {"src-addr", DYN_SRC_ADDR},
157 {"src-port", DYN_SRC_PORT},
158 {"dst-addr", DYN_DST_ADDR},
159 {"dst-port", DYN_DST_PORT},
164 * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
165 * This is only used in this code.
167 #define IPPROTO_ETHERTYPE 0x1000
168 static struct _s_x ether_types[] = {
170 * Note, we cannot use "-:&/" in the names because they are field
171 * separators in the type specifications. Also, we use s = NULL as
172 * end-delimiter, because a type of 0 can be legal.
185 { "pppoe_disc", 0x8863 },
186 { "pppoe_sess", 0x8864 },
187 { "ipx_8022", 0x00E0 },
188 { "ipx_8023", 0x0000 },
189 { "ipx_ii", 0x8137 },
190 { "ipx_snap", 0x8137 },
197 static struct _s_x rule_actions[] = {
198 { "accept", TOK_ACCEPT },
199 { "pass", TOK_ACCEPT },
200 { "allow", TOK_ACCEPT },
201 { "permit", TOK_ACCEPT },
202 { "count", TOK_COUNT },
203 { "pipe", TOK_PIPE },
204 { "queue", TOK_QUEUE },
205 { "divert", TOK_DIVERT },
207 { "netgraph", TOK_NETGRAPH },
208 { "ngtee", TOK_NGTEE },
209 { "fwd", TOK_FORWARD },
210 { "forward", TOK_FORWARD },
211 { "skipto", TOK_SKIPTO },
212 { "deny", TOK_DENY },
213 { "drop", TOK_DENY },
214 { "reject", TOK_REJECT },
215 { "reset6", TOK_RESET6 },
216 { "reset", TOK_RESET },
217 { "unreach6", TOK_UNREACH6 },
218 { "unreach", TOK_UNREACH },
219 { "check-state", TOK_CHECKSTATE },
220 { "//", TOK_COMMENT },
222 { "reass", TOK_REASS },
223 { "setfib", TOK_SETFIB },
224 { "call", TOK_CALL },
225 { "return", TOK_RETURN },
226 { NULL, 0 } /* terminator */
229 static struct _s_x rule_action_params[] = {
230 { "altq", TOK_ALTQ },
233 { "untag", TOK_UNTAG },
234 { NULL, 0 } /* terminator */
238 * The 'lookup' instruction accepts one of the following arguments.
239 * -1 is a terminator for the list.
240 * Arguments are passed as v[1] in O_DST_LOOKUP options.
242 static int lookup_key[] = {
243 TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
244 TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
246 static struct _s_x rule_options[] = {
247 { "tagged", TOK_TAGGED },
250 { "jail", TOK_JAIL },
252 { "limit", TOK_LIMIT },
253 { "keep-state", TOK_KEEPSTATE },
254 { "bridged", TOK_LAYER2 },
255 { "layer2", TOK_LAYER2 },
257 { "diverted", TOK_DIVERTED },
258 { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
259 { "diverted-output", TOK_DIVERTEDOUTPUT },
260 { "xmit", TOK_XMIT },
261 { "recv", TOK_RECV },
263 { "fragment", TOK_FRAG },
264 { "frag", TOK_FRAG },
266 { "ipoptions", TOK_IPOPTS },
267 { "ipopts", TOK_IPOPTS },
268 { "iplen", TOK_IPLEN },
269 { "ipid", TOK_IPID },
270 { "ipprecedence", TOK_IPPRECEDENCE },
271 { "dscp", TOK_DSCP },
272 { "iptos", TOK_IPTOS },
273 { "ipttl", TOK_IPTTL },
274 { "ipversion", TOK_IPVER },
275 { "ipver", TOK_IPVER },
276 { "estab", TOK_ESTAB },
277 { "established", TOK_ESTAB },
278 { "setup", TOK_SETUP },
279 { "sockarg", TOK_SOCKARG },
280 { "tcpdatalen", TOK_TCPDATALEN },
281 { "tcpflags", TOK_TCPFLAGS },
282 { "tcpflgs", TOK_TCPFLAGS },
283 { "tcpoptions", TOK_TCPOPTS },
284 { "tcpopts", TOK_TCPOPTS },
285 { "tcpseq", TOK_TCPSEQ },
286 { "tcpack", TOK_TCPACK },
287 { "tcpwin", TOK_TCPWIN },
288 { "icmptype", TOK_ICMPTYPES },
289 { "icmptypes", TOK_ICMPTYPES },
290 { "dst-ip", TOK_DSTIP },
291 { "src-ip", TOK_SRCIP },
292 { "dst-port", TOK_DSTPORT },
293 { "src-port", TOK_SRCPORT },
294 { "proto", TOK_PROTO },
297 { "mac-type", TOK_MACTYPE },
298 { "verrevpath", TOK_VERREVPATH },
299 { "versrcreach", TOK_VERSRCREACH },
300 { "antispoof", TOK_ANTISPOOF },
301 { "ipsec", TOK_IPSEC },
302 { "icmp6type", TOK_ICMP6TYPES },
303 { "icmp6types", TOK_ICMP6TYPES },
304 { "ext6hdr", TOK_EXT6HDR},
305 { "flow-id", TOK_FLOWID},
310 { "dst-ipv6", TOK_DSTIP6},
311 { "dst-ip6", TOK_DSTIP6},
312 { "src-ipv6", TOK_SRCIP6},
313 { "src-ip6", TOK_SRCIP6},
314 { "lookup", TOK_LOOKUP},
315 { "//", TOK_COMMENT },
317 { "not", TOK_NOT }, /* pseudo option */
318 { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
319 { "or", TOK_OR }, /* pseudo option */
320 { "|", /* escape */ TOK_OR }, /* pseudo option */
321 { "{", TOK_STARTBRACE }, /* pseudo option */
322 { "(", TOK_STARTBRACE }, /* pseudo option */
323 { "}", TOK_ENDBRACE }, /* pseudo option */
324 { ")", TOK_ENDBRACE }, /* pseudo option */
325 { NULL, 0 } /* terminator */
329 * Helper routine to print a possibly unaligned uint64_t on
330 * various platform. If width > 0, print the value with
331 * the desired width, followed by a space;
332 * otherwise, return the required width.
335 pr_u64(uint64_t *pd, int width)
338 #define U64_FMT "I64"
340 #define U64_FMT "llu"
343 unsigned long long d;
345 bcopy (pd, &u, sizeof(u));
348 printf("%*" U64_FMT " ", width, d) :
349 snprintf(NULL, 0, "%" U64_FMT, d) ;
354 safe_calloc(size_t number, size_t size)
356 void *ret = calloc(number, size);
359 err(EX_OSERR, "calloc");
364 safe_realloc(void *ptr, size_t size)
366 void *ret = realloc(ptr, size);
369 err(EX_OSERR, "realloc");
374 * conditionally runs the command.
375 * Selected options or negative -> getsockopt
378 do_cmd(int optname, void *optval, uintptr_t optlen)
385 if (ipfw_socket == -1)
386 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
388 err(EX_UNAVAILABLE, "socket");
390 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
391 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
392 optname == IP_FW_TABLE_GETSIZE ||
393 optname == IP_FW_NAT_GET_CONFIG ||
395 optname == IP_FW_NAT_GET_LOG) {
398 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval,
399 (socklen_t *)optlen);
401 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen);
406 #if 0 // XXX still unused
408 * do_setcmd3 - pass ipfw control cmd to kernel
409 * @optname: option name
410 * @optval: pointer to option data
411 * @optlen: option length
413 * Function encapsulates option value in IP_FW3 socket option
414 * and calls setsockopt().
415 * Function returns 0 on success or -1 otherwise.
418 do_setcmd3(int optname, void *optval, socklen_t optlen)
421 ip_fw3_opheader *op3;
426 if (ipfw_socket == -1)
427 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
429 err(EX_UNAVAILABLE, "socket");
431 len = sizeof(ip_fw3_opheader) + optlen;
433 /* Zero reserved fields */
434 memset(op3, 0, sizeof(ip_fw3_opheader));
435 memcpy(op3 + 1, optval, optlen);
436 op3->opcode = optname;
438 return setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, len);
440 #endif // XXX still unused
443 * match_token takes a table and a string, returns the value associated
444 * with the string (-1 in case of failure).
447 match_token(struct _s_x *table, char *string)
450 uint i = strlen(string);
452 for (pt = table ; i && pt->s != NULL ; pt++)
453 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
459 * match_value takes a table and a value, returns the string associated
460 * with the value (NULL in case of failure).
463 match_value(struct _s_x *p, int value)
465 for (; p->s != NULL; p++)
472 * _substrcmp takes two strings and returns 1 if they do not match,
473 * and 0 if they match exactly or the first string is a sub-string
474 * of the second. A warning is printed to stderr in the case that the
475 * first string is a sub-string of the second.
477 * This function will be removed in the future through the usual
478 * deprecation process.
481 _substrcmp(const char *str1, const char* str2)
484 if (strncmp(str1, str2, strlen(str1)) != 0)
487 if (strlen(str1) != strlen(str2))
488 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
494 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
495 * and 0 if they match exactly or the second string is a sub-string
496 * of the first. A warning is printed to stderr in the case that the
497 * first string does not match the third.
499 * This function exists to warn about the bizarre construction
500 * strncmp(str, "by", 2) which is used to allow people to use a shortcut
501 * for "bytes". The problem is that in addition to accepting "by",
502 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
503 * other string beginning with "by".
505 * This function will be removed in the future through the usual
506 * deprecation process.
509 _substrcmp2(const char *str1, const char* str2, const char* str3)
512 if (strncmp(str1, str2, strlen(str2)) != 0)
515 if (strcmp(str1, str3) != 0)
516 warnx("DEPRECATED: '%s' matched '%s'",
522 * prints one port, symbolic or numeric
525 print_port(int proto, uint16_t port)
528 if (proto == IPPROTO_ETHERTYPE) {
531 if (co.do_resolv && (s = match_value(ether_types, port)) )
534 printf("0x%04x", port);
536 struct servent *se = NULL;
538 struct protoent *pe = getprotobynumber(proto);
540 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
543 printf("%s", se->s_name);
549 static struct _s_x _port_name[] = {
550 {"dst-port", O_IP_DSTPORT},
551 {"src-port", O_IP_SRCPORT},
555 {"mac-type", O_MAC_TYPE},
556 {"tcpdatalen", O_TCPDATALEN},
557 {"tcpwin", O_TCPWIN},
558 {"tagged", O_TAGGED},
563 * Print the values in a list 16-bit items of the types above.
564 * XXX todo: add support for mask.
567 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
569 uint16_t *p = cmd->ports;
574 sep = match_value(_port_name, opcode);
580 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
582 print_port(proto, p[0]);
585 print_port(proto, p[1]);
592 * Like strtol, but also translates service names into port numbers
593 * for some protocols.
595 * proto == -1 disables the protocol check;
596 * proto == IPPROTO_ETHERTYPE looks up an internal table
597 * proto == <some value in /etc/protocols> matches the values there.
598 * Returns *end == s in case the parameter is not found.
601 strtoport(char *s, char **end, int base, int proto)
607 *end = s; /* default - not found */
609 return 0; /* not found */
612 return strtol(s, end, base);
615 * find separator. '\\' escapes the next char.
617 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
618 if (*s1 == '\\' && s1[1] != '\0')
621 buf = safe_calloc(s1 - s + 1, 1);
624 * copy into a buffer skipping backslashes
626 for (p = s, i = 0; p != s1 ; p++)
631 if (proto == IPPROTO_ETHERTYPE) {
632 i = match_token(ether_types, buf);
634 if (i != -1) { /* found */
639 struct protoent *pe = NULL;
643 pe = getprotobynumber(proto);
645 se = getservbyname(buf, pe ? pe->p_name : NULL);
649 return ntohs(se->s_port);
652 return 0; /* not found */
656 * Fill the body of the command with the list of port ranges.
659 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
661 uint16_t a, b, *p = cmd->ports;
666 a = strtoport(av, &s, 0, proto);
667 if (s == av) /* empty or invalid argument */
671 case '-': /* a range */
673 b = strtoport(av, &s, 0, proto);
674 /* Reject expressions like '1-abc' or '1-2-3'. */
675 if (s == av || (*s != ',' && *s != '\0'))
680 case ',': /* comma separated list */
685 warnx("port list: invalid separator <%c> in <%s>",
695 if (i + 1 > F_LEN_MASK)
696 errx(EX_DATAERR, "too many ports/ranges\n");
697 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
702 static struct _s_x icmpcodes[] = {
703 { "net", ICMP_UNREACH_NET },
704 { "host", ICMP_UNREACH_HOST },
705 { "protocol", ICMP_UNREACH_PROTOCOL },
706 { "port", ICMP_UNREACH_PORT },
707 { "needfrag", ICMP_UNREACH_NEEDFRAG },
708 { "srcfail", ICMP_UNREACH_SRCFAIL },
709 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
710 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
711 { "isolated", ICMP_UNREACH_ISOLATED },
712 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
713 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
714 { "tosnet", ICMP_UNREACH_TOSNET },
715 { "toshost", ICMP_UNREACH_TOSHOST },
716 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
717 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
718 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
723 fill_reject_code(u_short *codep, char *str)
728 val = strtoul(str, &s, 0);
729 if (s == str || *s != '\0' || val >= 0x100)
730 val = match_token(icmpcodes, str);
732 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
738 print_reject_code(uint16_t code)
740 char const *s = match_value(icmpcodes, code);
743 printf("unreach %s", s);
745 printf("unreach %u", code);
749 * Returns the number of bits set (from left) in a contiguous bitmask,
750 * or -1 if the mask is not contiguous.
751 * XXX this needs a proper fix.
752 * This effectively works on masks in big-endian (network) format.
753 * when compiled on little endian architectures.
755 * First bit is bit 7 of the first byte -- note, for MAC addresses,
756 * the first bit on the wire is bit 0 of the first byte.
757 * len is the max length in bits.
760 contigmask(uint8_t *p, int len)
764 for (i=0; i<len ; i++)
765 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
767 for (n=i+1; n < len; n++)
768 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
769 return -1; /* mask not contiguous */
774 * print flags set/clear in the two bitmasks passed as parameters.
775 * There is a specialized check for f_tcpflags.
778 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
780 char const *comma = "";
782 uint8_t set = cmd->arg1 & 0xff;
783 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
785 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
790 printf(" %s ", name);
791 for (i=0; list[i].x != 0; i++) {
792 if (set & list[i].x) {
794 printf("%s%s", comma, list[i].s);
797 if (clear & list[i].x) {
799 printf("%s!%s", comma, list[i].s);
806 * Print the ip address contained in a command.
809 print_ip(ipfw_insn_ip *cmd, char const *s)
811 struct hostent *he = NULL;
812 uint32_t len = F_LEN((ipfw_insn *)cmd);
813 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
815 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
817 const char *arg = "<invalid>";
819 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
820 arg = match_value(rule_options, lookup_key[d]);
821 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
825 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
827 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
831 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
832 cmd->o.opcode == O_IP_DST_LOOKUP) {
833 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
834 if (len == F_INSN_SIZE(ipfw_insn_u32))
839 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
840 uint32_t x, *map = (uint32_t *)&(cmd->mask);
846 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
847 printf("%s/%d", inet_ntoa(cmd->addr),
848 contigmask((uint8_t *)&x, 32));
849 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
850 x &= 0xff; /* base */
852 * Print bits and ranges.
853 * Locate first bit set (i), then locate first bit unset (j).
854 * If we have 3+ consecutive bits set, then print them as a
855 * range, otherwise only print the initial bit and rescan.
857 for (i=0; i < cmd->o.arg1; i++)
858 if (map[i/32] & (1<<(i & 31))) {
859 for (j=i+1; j < cmd->o.arg1; j++)
860 if (!(map[ j/32] & (1<<(j & 31))))
862 printf("%c%d", comma, i+x);
863 if (j>i+2) { /* range has at least 3 elements */
864 printf("-%d", j-1+x);
873 * len == 2 indicates a single IP, whereas lists of 1 or more
874 * addr/mask pairs have len = (2n+1). We convert len to n so we
875 * use that to count the number of entries.
877 for (len = len / 2; len > 0; len--, a += 2) {
878 int mb = /* mask length */
879 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
880 32 : contigmask((uint8_t *)&(a[1]), 32);
881 if (mb == 32 && co.do_resolv)
882 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
883 if (he != NULL) /* resolved to name */
884 printf("%s", he->h_name);
885 else if (mb == 0) /* any */
887 else { /* numeric IP followed by some kind of mask */
888 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
890 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
900 * prints a MAC address/mask pair
903 print_mac(uint8_t *addr, uint8_t *mask)
905 int l = contigmask(mask, 48);
910 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
911 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
913 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
914 mask[0], mask[1], mask[2],
915 mask[3], mask[4], mask[5]);
922 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
931 type = strtoul(av, &av, 0);
933 if (*av != ',' && *av != '\0')
934 errx(EX_DATAERR, "invalid ICMP type");
937 errx(EX_DATAERR, "ICMP type out of range");
939 cmd->d[0] |= 1 << type;
941 cmd->o.opcode = O_ICMPTYPE;
942 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
946 print_icmptypes(ipfw_insn_u32 *cmd)
951 printf(" icmptypes");
952 for (i = 0; i < 32; i++) {
953 if ( (cmd->d[0] & (1 << (i))) == 0)
955 printf("%c%d", sep, i);
961 * show_ipfw() prints the body of an ipfw rule.
962 * Because the standard rule has at least proto src_ip dst_ip, we use
963 * a helper function to produce these entries if not provided explicitly.
964 * The first argument is the list of fields we have, the second is
965 * the list of fields we want to be printed.
967 * Special cases if we have provided a MAC header:
968 * + if the rule does not contain IP addresses/ports, do not print them;
969 * + if the rule does not contain an IP proto, print "all" instead of "ip";
971 * Once we have 'have_options', IP header fields are printed as options.
973 #define HAVE_PROTO 0x0001
974 #define HAVE_SRCIP 0x0002
975 #define HAVE_DSTIP 0x0004
976 #define HAVE_PROTO4 0x0008
977 #define HAVE_PROTO6 0x0010
978 #define HAVE_IP 0x0100
979 #define HAVE_OPTIONS 0x8000
982 show_prerequisites(int *flags, int want, int cmd)
984 (void)cmd; /* UNUSED */
987 if ( (*flags & HAVE_IP) == HAVE_IP)
988 *flags |= HAVE_OPTIONS;
990 if ( !(*flags & HAVE_OPTIONS)) {
991 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
992 if ( (*flags & HAVE_PROTO4))
994 else if ( (*flags & HAVE_PROTO6))
999 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
1000 printf(" from any");
1001 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
1008 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
1010 static int twidth = 0;
1012 ipfw_insn *cmd, *tagptr = NULL;
1013 const char *comment = NULL; /* ptr to comment if we have one */
1014 int proto = 0; /* default */
1015 int flags = 0; /* prerequisites */
1016 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
1017 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
1018 int or_block = 0; /* we are in an or block */
1019 uint32_t set_disable;
1021 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
1023 if (set_disable & (1 << rule->set)) { /* disabled */
1027 printf("# DISABLED ");
1029 printf("%05u ", rule->rulenum);
1031 if (pcwidth > 0 || bcwidth > 0) {
1032 pr_u64(&rule->pcnt, pcwidth);
1033 pr_u64(&rule->bcnt, bcwidth);
1036 if (co.do_time == 2)
1037 printf("%10u ", rule->timestamp);
1038 else if (co.do_time == 1) {
1040 time_t t = (time_t)0;
1043 strcpy(timestr, ctime(&t));
1044 *strchr(timestr, '\n') = '\0';
1045 twidth = strlen(timestr);
1047 if (rule->timestamp) {
1048 t = _long_to_time(rule->timestamp);
1050 strcpy(timestr, ctime(&t));
1051 *strchr(timestr, '\n') = '\0';
1052 printf("%s ", timestr);
1054 printf("%*s", twidth, " ");
1059 printf("set %d ", rule->set);
1062 * print the optional "match probability"
1064 if (rule->cmd_len > 0) {
1066 if (cmd->opcode == O_PROB) {
1067 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1068 double d = 1.0 * p->d[0];
1070 d = (d / 0x7fffffff);
1071 printf("prob %f ", d);
1076 * first print actions
1078 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1079 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1080 switch(cmd->opcode) {
1082 printf("check-state");
1083 /* avoid printing anything else */
1084 flags = HAVE_PROTO | HAVE_SRCIP |
1085 HAVE_DSTIP | HAVE_IP;
1101 if (cmd->arg1 == ICMP_REJECT_RST)
1103 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1106 print_reject_code(cmd->arg1);
1110 if (cmd->arg1 == ICMP6_UNREACH_RST)
1113 print_unreach6_code(cmd->arg1);
1117 PRINT_UINT_ARG("skipto ", cmd->arg1);
1121 PRINT_UINT_ARG("pipe ", cmd->arg1);
1125 PRINT_UINT_ARG("queue ", cmd->arg1);
1129 PRINT_UINT_ARG("divert ", cmd->arg1);
1133 PRINT_UINT_ARG("tee ", cmd->arg1);
1137 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1141 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1146 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1148 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1149 printf("fwd tablearg");
1151 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1154 printf(",%d", s->sa.sin_port);
1158 #if 0 // XXX unused yet
1161 char buf[4 + INET6_ADDRSTRLEN + 1];
1162 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd;
1164 printf("fwd %s", inet_ntop(AF_INET6, &s->sa.sin6_addr,
1166 if (s->sa.sin6_port)
1167 printf(",%d", s->sa.sin6_port);
1170 #endif // XXX unused yet
1173 case O_LOG: /* O_LOG is printed last */
1174 logptr = (ipfw_insn_log *)cmd;
1177 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1178 altqptr = (ipfw_insn_altq *)cmd;
1187 PRINT_UINT_ARG("nat ", cmd->arg1);
1189 printf("nat global");
1193 PRINT_UINT_ARG("setfib ", cmd->arg1);
1201 if (cmd->len & F_NOT)
1204 PRINT_UINT_ARG("call ", cmd->arg1);
1208 printf("** unrecognized action %d len %d ",
1209 cmd->opcode, cmd->len);
1213 if (logptr->max_log > 0)
1214 printf(" log logamount %d", logptr->max_log);
1220 print_altq_cmd(altqptr);
1224 if (tagptr->len & F_NOT)
1225 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1227 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1231 * then print the body.
1233 for (l = rule->act_ofs, cmd = rule->cmd ;
1234 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1235 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1237 if (cmd->opcode == O_IP4) {
1238 flags |= HAVE_PROTO4;
1240 } else if (cmd->opcode == O_IP6) {
1241 flags |= HAVE_PROTO6;
1245 if (rule->_pad & 1) { /* empty rules before options */
1246 if (!co.do_compact) {
1247 show_prerequisites(&flags, HAVE_PROTO, 0);
1248 printf(" from any to any");
1250 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO |
1251 HAVE_SRCIP | HAVE_DSTIP;
1254 if (co.comment_only)
1257 for (l = rule->act_ofs, cmd = rule->cmd ;
1258 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1260 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1262 if (co.comment_only) {
1263 if (cmd->opcode != O_NOP)
1265 printf(" // %s\n", (char *)(cmd + 1));
1269 show_prerequisites(&flags, 0, cmd->opcode);
1271 switch(cmd->opcode) {
1273 break; /* done already */
1276 break; /* no need to print anything here */
1279 case O_IP_SRC_LOOKUP:
1283 show_prerequisites(&flags, HAVE_PROTO, 0);
1284 if (!(flags & HAVE_SRCIP))
1286 if ((cmd->len & F_OR) && !or_block)
1288 print_ip((ipfw_insn_ip *)cmd,
1289 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1290 flags |= HAVE_SRCIP;
1294 case O_IP_DST_LOOKUP:
1298 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1299 if (!(flags & HAVE_DSTIP))
1301 if ((cmd->len & F_OR) && !or_block)
1303 print_ip((ipfw_insn_ip *)cmd,
1304 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1305 flags |= HAVE_DSTIP;
1309 case O_IP6_SRC_MASK:
1311 show_prerequisites(&flags, HAVE_PROTO, 0);
1312 if (!(flags & HAVE_SRCIP))
1314 if ((cmd->len & F_OR) && !or_block)
1316 print_ip6((ipfw_insn_ip6 *)cmd,
1317 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1318 flags |= HAVE_SRCIP | HAVE_PROTO;
1322 case O_IP6_DST_MASK:
1324 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1325 if (!(flags & HAVE_DSTIP))
1327 if ((cmd->len & F_OR) && !or_block)
1329 print_ip6((ipfw_insn_ip6 *)cmd,
1330 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1331 flags |= HAVE_DSTIP;
1335 print_flow6id( (ipfw_insn_u32 *) cmd );
1336 flags |= HAVE_OPTIONS;
1340 show_prerequisites(&flags,
1341 HAVE_PROTO | HAVE_SRCIP |
1342 HAVE_DSTIP | HAVE_IP, 0);
1344 if (flags & HAVE_DSTIP)
1346 show_prerequisites(&flags,
1347 HAVE_PROTO | HAVE_SRCIP, 0);
1348 if ((cmd->len & F_OR) && !or_block)
1350 if (cmd->len & F_NOT)
1352 print_newports((ipfw_insn_u16 *)cmd, proto,
1353 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1357 struct protoent *pe = NULL;
1359 if ((cmd->len & F_OR) && !or_block)
1361 if (cmd->len & F_NOT)
1364 pe = getprotobynumber(cmd->arg1);
1365 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1366 !(flags & HAVE_PROTO))
1367 show_prerequisites(&flags,
1368 HAVE_PROTO | HAVE_IP | HAVE_SRCIP |
1369 HAVE_DSTIP | HAVE_OPTIONS, 0);
1370 if (flags & HAVE_OPTIONS)
1373 printf(" %s", pe->p_name);
1375 printf(" %u", cmd->arg1);
1377 flags |= HAVE_PROTO;
1380 default: /*options ... */
1381 if (!(cmd->len & (F_OR|F_NOT)))
1382 if (((cmd->opcode == O_IP6) &&
1383 (flags & HAVE_PROTO6)) ||
1384 ((cmd->opcode == O_IP4) &&
1385 (flags & HAVE_PROTO4)))
1387 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP |
1388 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0);
1389 if ((cmd->len & F_OR) && !or_block)
1391 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1393 switch(cmd->opcode) {
1395 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1398 print_mac(m->addr, m->mask);
1399 print_mac(m->addr + 6, m->mask + 6);
1404 print_newports((ipfw_insn_u16 *)cmd,
1405 IPPROTO_ETHERTYPE, cmd->opcode);
1414 printf(" fib %u", cmd->arg1 );
1421 printf(cmd->len & F_NOT ? " out" : " in");
1425 switch (cmd->arg1) {
1427 printf(" diverted");
1430 printf(" diverted-loopback");
1433 printf(" diverted-output");
1436 printf(" diverted-?<%u>", cmd->arg1);
1449 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1451 if (cmd->opcode == O_XMIT)
1453 else if (cmd->opcode == O_RECV)
1455 else /* if (cmd->opcode == O_VIA) */
1457 if (cmdif->name[0] == '\0')
1459 inet_ntoa(cmdif->p.ip));
1461 printf(" %s %s", s, cmdif->name);
1466 if (F_LEN(cmd) == 1)
1467 printf(" ipid %u", cmd->arg1 );
1469 print_newports((ipfw_insn_u16 *)cmd, 0,
1474 if (F_LEN(cmd) == 1)
1475 printf(" ipttl %u", cmd->arg1 );
1477 print_newports((ipfw_insn_u16 *)cmd, 0,
1482 printf(" ipver %u", cmd->arg1 );
1485 case O_IPPRECEDENCE:
1486 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1490 if (F_LEN(cmd) == 1)
1491 printf(" iplen %u", cmd->arg1 );
1493 print_newports((ipfw_insn_u16 *)cmd, 0,
1498 print_flags("ipoptions", cmd, f_ipopts);
1502 print_flags("iptos", cmd, f_iptos);
1506 print_icmptypes((ipfw_insn_u32 *)cmd);
1510 printf(" established");
1514 if (F_LEN(cmd) == 1)
1515 printf(" tcpdatalen %u", cmd->arg1 );
1517 print_newports((ipfw_insn_u16 *)cmd, 0,
1522 print_flags("tcpflags", cmd, f_tcpflags);
1526 print_flags("tcpoptions", cmd, f_tcpopts);
1530 printf(" tcpwin %d", ntohs(cmd->arg1));
1534 printf(" tcpack %d", ntohl(cmd32->d[0]));
1538 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1543 struct passwd *pwd = getpwuid(cmd32->d[0]);
1546 printf(" uid %s", pwd->pw_name);
1548 printf(" uid %u", cmd32->d[0]);
1554 struct group *grp = getgrgid(cmd32->d[0]);
1557 printf(" gid %s", grp->gr_name);
1559 printf(" gid %u", cmd32->d[0]);
1564 printf(" jail %d", cmd32->d[0]);
1568 printf(" verrevpath");
1572 printf(" versrcreach");
1576 printf(" antispoof");
1584 comment = (char *)(cmd + 1);
1588 printf(" keep-state");
1592 struct _s_x *p = limit_masks;
1593 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1594 uint8_t x = c->limit_mask;
1595 char const *comma = " ";
1598 for (; p->x != 0 ; p++)
1599 if ((x & p->x) == p->x) {
1601 printf("%s%s", comma, p->s);
1604 PRINT_UINT_ARG(" ", c->conn_limit);
1617 print_icmp6types((ipfw_insn_u32 *)cmd);
1621 print_ext6hdr( (ipfw_insn *) cmd );
1625 if (F_LEN(cmd) == 1)
1626 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1628 print_newports((ipfw_insn_u16 *)cmd, 0,
1633 printf(" [opcode %d len %d]",
1634 cmd->opcode, cmd->len);
1637 if (cmd->len & F_OR) {
1640 } else if (or_block) {
1645 show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP
1648 printf(" // %s", comment);
1653 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1655 struct protoent *pe;
1658 char buf[INET6_ADDRSTRLEN];
1660 if (!co.do_expired) {
1661 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1664 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1665 printf("%05d", rulenum);
1666 if (pcwidth > 0 || bcwidth > 0) {
1668 pr_u64(&d->pcnt, pcwidth);
1669 pr_u64(&d->bcnt, bcwidth);
1670 printf("(%ds)", d->expire);
1672 switch (d->dyn_type) {
1673 case O_LIMIT_PARENT:
1674 printf(" PARENT %d", d->count);
1679 case O_KEEP_STATE: /* bidir, no mask */
1684 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1685 printf(" %s", pe->p_name);
1687 printf(" proto %u", d->id.proto);
1689 if (d->id.addr_type == 4) {
1690 a.s_addr = htonl(d->id.src_ip);
1691 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1693 a.s_addr = htonl(d->id.dst_ip);
1694 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1695 } else if (d->id.addr_type == 6) {
1696 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1697 sizeof(buf)), d->id.src_port);
1698 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1699 sizeof(buf)), d->id.dst_port);
1701 printf(" UNKNOWN <-> UNKNOWN\n");
1707 * This one handles all set-related commands
1708 * ipfw set { show | enable | disable }
1710 * ipfw set move X to Y
1711 * ipfw set move rule X to Y
1714 ipfw_sets_handler(char *av[])
1716 uint32_t set_disable, masks[2];
1719 uint8_t cmd, new_set;
1724 errx(EX_USAGE, "set needs command");
1725 if (_substrcmp(*av, "show") == 0) {
1730 nalloc = nbytes = sizeof(struct ip_fw);
1731 while (nbytes >= nalloc) {
1734 nalloc = nalloc * 2 + 200;
1736 data = safe_calloc(1, nbytes);
1737 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1738 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1741 bcopy(&((struct ip_fw *)data)->next_rule,
1742 &set_disable, sizeof(set_disable));
1744 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1745 if ((set_disable & (1<<i))) {
1746 printf("%s %d", msg, i);
1749 msg = (set_disable) ? " enable" : "enable";
1750 for (i = 0; i < RESVD_SET; i++)
1751 if (!(set_disable & (1<<i))) {
1752 printf("%s %d", msg, i);
1756 } else if (_substrcmp(*av, "swap") == 0) {
1758 if ( av[0] == NULL || av[1] == NULL )
1759 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1760 rulenum = atoi(av[0]);
1761 new_set = atoi(av[1]);
1762 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1763 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1764 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1765 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1766 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1767 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1768 } else if (_substrcmp(*av, "move") == 0) {
1770 if (av[0] && _substrcmp(*av, "rule") == 0) {
1775 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1776 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1777 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1778 rulenum = atoi(av[0]);
1779 new_set = atoi(av[2]);
1780 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1781 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1782 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1783 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1784 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1785 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1786 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1787 } else if (_substrcmp(*av, "disable") == 0 ||
1788 _substrcmp(*av, "enable") == 0 ) {
1789 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1792 masks[0] = masks[1] = 0;
1795 if (isdigit(**av)) {
1797 if (i < 0 || i > RESVD_SET)
1799 "invalid set number %d\n", i);
1800 masks[which] |= (1<<i);
1801 } else if (_substrcmp(*av, "disable") == 0)
1803 else if (_substrcmp(*av, "enable") == 0)
1807 "invalid set command %s\n", *av);
1810 if ( (masks[0] & masks[1]) != 0 )
1812 "cannot enable and disable the same set\n");
1814 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1816 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1818 errx(EX_USAGE, "invalid set command %s\n", *av);
1822 ipfw_sysctl_handler(char *av[], int which)
1826 if (av[0] == NULL) {
1827 warnx("missing keyword to enable/disable\n");
1828 } else if (_substrcmp(*av, "firewall") == 0) {
1829 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1830 &which, sizeof(which));
1831 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0,
1832 &which, sizeof(which));
1833 } else if (_substrcmp(*av, "one_pass") == 0) {
1834 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1835 &which, sizeof(which));
1836 } else if (_substrcmp(*av, "debug") == 0) {
1837 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1838 &which, sizeof(which));
1839 } else if (_substrcmp(*av, "verbose") == 0) {
1840 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1841 &which, sizeof(which));
1842 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1843 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1844 &which, sizeof(which));
1846 } else if (_substrcmp(*av, "altq") == 0) {
1847 altq_set_enabled(which);
1850 warnx("unrecognize enable/disable keyword: %s\n", *av);
1855 ipfw_list(int ac, char *av[], int show_counters)
1858 ipfw_dyn_rule *dynrules, *d;
1860 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1863 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1864 int exitval = EX_OK;
1872 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1873 int nalloc = 1024; /* start somewhere... */
1878 fprintf(stderr, "Testing only, list disabled\n");
1882 dummynet_list(ac, av, show_counters);
1889 /* get rules or pipes from kernel, resizing array as necessary */
1892 while (nbytes >= nalloc) {
1893 nalloc = nalloc * 2 + 200;
1895 data = safe_realloc(data, nbytes);
1896 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1897 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1898 co.do_pipe ? "DUMMYNET" : "FW");
1902 * Count static rules. They have variable size so we
1903 * need to scan the list to count them.
1905 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1906 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1907 ++nstat, r = NEXT(r) )
1911 * Count dynamic rules. This is easier as they have
1915 dynrules = (ipfw_dyn_rule *)r ;
1916 n = (char *)r - (char *)data;
1917 ndyn = (nbytes - n) / sizeof *dynrules;
1919 /* if showing stats, figure out column widths ahead of time */
1920 bcwidth = pcwidth = 0;
1921 if (show_counters) {
1922 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1923 /* skip rules from another set */
1924 if (co.use_set && r->set != co.use_set - 1)
1927 /* packet counter */
1928 width = pr_u64(&r->pcnt, 0);
1929 if (width > pcwidth)
1933 width = pr_u64(&r->bcnt, 0);
1934 if (width > bcwidth)
1938 if (co.do_dynamic && ndyn) {
1939 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1941 /* skip rules from another set */
1942 bcopy((char *)&d->rule + sizeof(uint16_t),
1943 &set, sizeof(uint8_t));
1944 if (set != co.use_set - 1)
1947 width = pr_u64(&d->pcnt, 0);
1948 if (width > pcwidth)
1951 width = pr_u64(&d->bcnt, 0);
1952 if (width > bcwidth)
1956 /* if no rule numbers were specified, list all rules */
1958 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1959 if (co.use_set && r->set != co.use_set - 1)
1961 show_ipfw(r, pcwidth, bcwidth);
1964 if (co.do_dynamic && ndyn) {
1965 printf("## Dynamic rules (%d):\n", ndyn);
1966 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1968 bcopy((char *)&d->rule + sizeof(uint16_t),
1969 &set, sizeof(uint8_t));
1970 if (set != co.use_set - 1)
1973 show_dyn_ipfw(d, pcwidth, bcwidth);
1979 /* display specific rules requested on command line */
1981 for (lac = ac, lav = av; lac != 0; lac--) {
1982 /* convert command line rule # */
1983 last = rnum = strtoul(*lav++, &endptr, 10);
1985 last = strtoul(endptr+1, &endptr, 10);
1988 warnx("invalid rule number: %s", *(lav - 1));
1991 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1992 if (r->rulenum > last)
1994 if (co.use_set && r->set != co.use_set - 1)
1996 if (r->rulenum >= rnum && r->rulenum <= last) {
1997 show_ipfw(r, pcwidth, bcwidth);
2002 /* give precedence to other error(s) */
2003 if (exitval == EX_OK)
2004 exitval = EX_UNAVAILABLE;
2005 warnx("rule %lu does not exist", rnum);
2009 if (co.do_dynamic && ndyn) {
2010 printf("## Dynamic rules:\n");
2011 for (lac = ac, lav = av; lac != 0; lac--) {
2012 last = rnum = strtoul(*lav++, &endptr, 10);
2014 last = strtoul(endptr+1, &endptr, 10);
2016 /* already warned */
2018 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
2021 bcopy(&d->rule, &rulenum, sizeof(rulenum));
2025 bcopy((char *)&d->rule + sizeof(uint16_t),
2026 &set, sizeof(uint8_t));
2027 if (set != co.use_set - 1)
2030 if (r->rulenum >= rnum && r->rulenum <= last)
2031 show_dyn_ipfw(d, pcwidth, bcwidth);
2041 if (exitval != EX_OK)
2047 lookup_host (char *host, struct in_addr *ipaddr)
2051 if (!inet_aton(host, ipaddr)) {
2052 if ((he = gethostbyname(host)) == NULL)
2054 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
2060 * fills the addr and mask fields in the instruction as appropriate from av.
2061 * Update length as appropriate.
2062 * The following formats are allowed:
2063 * me returns O_IP_*_ME
2064 * 1.2.3.4 single IP address
2065 * 1.2.3.4:5.6.7.8 address:mask
2066 * 1.2.3.4/24 address/mask
2067 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
2068 * We can have multiple comma-separated address/mask entries.
2071 fill_ip(ipfw_insn_ip *cmd, char *av)
2074 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
2076 cmd->o.len &= ~F_LEN_MASK; /* zero len */
2078 if (_substrcmp(av, "any") == 0)
2081 if (_substrcmp(av, "me") == 0) {
2082 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2086 if (strncmp(av, "table(", 6) == 0) {
2087 char *p = strchr(av + 6, ',');
2091 cmd->o.opcode = O_IP_DST_LOOKUP;
2092 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
2094 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2095 d[0] = strtoul(p, NULL, 0);
2097 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2103 * After the address we can have '/' or ':' indicating a mask,
2104 * ',' indicating another address follows, '{' indicating a
2105 * set of addresses of unspecified size.
2107 char *t = NULL, *p = strpbrk(av, "/:,{");
2114 if ((t = strpbrk(p, ",{")) != NULL) {
2121 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2122 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2125 if (!inet_aton(p, (struct in_addr *)&d[1]))
2126 errx(EX_DATAERR, "bad netmask ``%s''", p);
2131 d[1] = htonl(0); /* mask */
2132 else if (masklen > 32)
2133 errx(EX_DATAERR, "bad width ``%s''", p);
2135 d[1] = htonl(~0 << (32 - masklen));
2137 case '{': /* no mask, assume /24 and put back the '{' */
2138 d[1] = htonl(~0 << (32 - 24));
2142 case ',': /* single address plus continuation */
2145 case 0: /* initialization value */
2147 d[1] = htonl(~0); /* force /32 */
2150 d[0] &= d[1]; /* mask base address with mask */
2153 /* find next separator */
2155 p = strpbrk(p, ",{");
2156 if (p && *p == '{') {
2158 * We have a set of addresses. They are stored as follows:
2159 * arg1 is the set size (powers of 2, 2..256)
2160 * addr is the base address IN HOST FORMAT
2161 * mask.. is an array of arg1 bits (rounded up to
2162 * the next multiple of 32) with bits set
2163 * for each host in the map.
2165 uint32_t *map = (uint32_t *)&cmd->mask;
2167 int i = contigmask((uint8_t *)&(d[1]), 32);
2170 errx(EX_DATAERR, "address set cannot be in a list");
2171 if (i < 24 || i > 31)
2172 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2173 cmd->o.arg1 = 1<<(32-i); /* map length */
2174 d[0] = ntohl(d[0]); /* base addr in host format */
2175 cmd->o.opcode = O_IP_DST_SET; /* default */
2176 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2177 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2178 map[i] = 0; /* clear map */
2182 high = low + cmd->o.arg1 - 1;
2184 * Here, i stores the previous value when we specify a range
2185 * of addresses within a mask, e.g. 45-63. i = -1 means we
2186 * have no previous value.
2188 i = -1; /* previous value in a range */
2189 while (isdigit(*av)) {
2191 int a = strtol(av, &s, 0);
2193 if (s == av) { /* no parameter */
2195 errx(EX_DATAERR, "set not closed\n");
2197 errx(EX_DATAERR, "incomplete range %d-", i);
2200 if (a < low || a > high)
2201 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2204 if (i == -1) /* no previous in range */
2206 else { /* check that range is valid */
2208 errx(EX_DATAERR, "invalid range %d-%d",
2211 errx(EX_DATAERR, "double '-' in range");
2214 map[i/32] |= 1<<(i & 31);
2225 if (av) /* then *av must be a ',' */
2228 /* Check this entry */
2229 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2231 * 'any' turns the entire list into a NOP.
2232 * 'not any' never matches, so it is removed from the
2233 * list unless it is the only item, in which case we
2236 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2237 if (av == NULL && len == 0) /* only this entry */
2238 errx(EX_DATAERR, "not any never matches");
2240 /* else do nothing and skip this entry */
2243 /* A single IP can be stored in an optimized format */
2244 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2245 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2248 len += 2; /* two words... */
2251 if (len + 1 > F_LEN_MASK)
2252 errx(EX_DATAERR, "address list too long");
2253 cmd->o.len |= len+1;
2257 /* n2mask sets n bits of the mask */
2259 n2mask(struct in6_addr *mask, int n)
2261 static int minimask[9] =
2262 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2265 memset(mask, 0, sizeof(struct in6_addr));
2266 p = (u_char *) mask;
2267 for (; n > 0; p++, n -= 8) {
2277 * helper function to process a set of flags and set bits in the
2278 * appropriate masks.
2281 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2282 struct _s_x *flags, char *p)
2284 uint8_t set=0, clear=0;
2287 char *q; /* points to the separator */
2289 uint8_t *which; /* mask we are working on */
2299 val = match_token(flags, p);
2301 errx(EX_DATAERR, "invalid flag %s", p);
2302 *which |= (uint8_t)val;
2305 cmd->opcode = opcode;
2306 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2307 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2312 ipfw_delete(char *av[])
2316 int exitval = EX_OK;
2320 NEED1("missing rule specification");
2321 if ( *av && _substrcmp(*av, "set") == 0) {
2322 /* Do not allow using the following syntax:
2323 * ipfw set N delete set M
2326 errx(EX_DATAERR, "invalid syntax");
2327 do_set = 1; /* delete set */
2332 while (*av && isdigit(**av)) {
2333 i = atoi(*av); av++;
2335 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2337 exitval = EX_UNAVAILABLE;
2338 warn("rule %u not available", i);
2340 } else if (co.do_pipe) {
2341 exitval = ipfw_delete_pipe(co.do_pipe, i);
2344 rulenum = (i & 0xffff) | (5 << 24) |
2345 ((co.use_set - 1) << 16);
2347 rulenum = (i & 0xffff) | (do_set << 24);
2348 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2350 exitval = EX_UNAVAILABLE;
2351 warn("rule %u: setsockopt(IP_FW_DEL)",
2356 if (exitval != EX_OK)
2362 * fill the interface structure. We do not check the name as we can
2363 * create interfaces dynamically, so checking them at insert time
2364 * makes relatively little sense.
2365 * Interface names containing '*', '?', or '[' are assumed to be shell
2366 * patterns which match interfaces.
2369 fill_iface(ipfw_insn_if *cmd, char *arg)
2371 cmd->name[0] = '\0';
2372 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2374 /* Parse the interface or address */
2375 if (strcmp(arg, "any") == 0)
2376 cmd->o.len = 0; /* effectively ignore this command */
2377 else if (!isdigit(*arg)) {
2378 strlcpy(cmd->name, arg, sizeof(cmd->name));
2379 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2380 } else if (!inet_aton(arg, &cmd->p.ip))
2381 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2385 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2389 char *ap, *ptr, *optr;
2390 struct ether_addr *mac;
2391 const char *macset = "0123456789abcdefABCDEF:";
2393 if (strcmp(p, "any") == 0) {
2394 for (i = 0; i < ETHER_ADDR_LEN; i++)
2395 addr[i] = mask[i] = 0;
2399 optr = ptr = strdup(p);
2400 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2402 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2403 errx(EX_DATAERR, "Incorrect MAC address");
2404 bcopy(mac, addr, ETHER_ADDR_LEN);
2406 errx(EX_DATAERR, "Incorrect MAC address");
2408 if (ptr != NULL) { /* we have mask? */
2409 if (p[ptr - optr - 1] == '/') { /* mask len */
2410 long ml = strtol(ptr, &ap, 10);
2411 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2412 errx(EX_DATAERR, "Incorrect mask length");
2413 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2414 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2417 if (strspn(ptr, macset) != l ||
2418 (mac = ether_aton(ptr)) == NULL)
2419 errx(EX_DATAERR, "Incorrect mask");
2420 bcopy(mac, mask, ETHER_ADDR_LEN);
2422 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2423 for (i = 0; i < ETHER_ADDR_LEN; i++)
2426 for (i = 0; i < ETHER_ADDR_LEN; i++)
2433 * helper function, updates the pointer to cmd with the length
2434 * of the current command, and also cleans up the first word of
2435 * the new command in case it has been clobbered before.
2438 next_cmd(ipfw_insn *cmd)
2441 bzero(cmd, sizeof(*cmd));
2446 * Takes arguments and copies them into a comment
2449 fill_comment(ipfw_insn *cmd, char **av)
2452 char *p = (char *)(cmd + 1);
2454 cmd->opcode = O_NOP;
2455 cmd->len = (cmd->len & (F_NOT | F_OR));
2457 /* Compute length of comment string. */
2458 for (i = 0, l = 0; av[i] != NULL; i++)
2459 l += strlen(av[i]) + 1;
2464 "comment too long (max 80 chars)");
2466 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2467 for (i = 0; av[i] != NULL; i++) {
2476 * A function to fill simple commands of size 1.
2477 * Existing flags are preserved.
2480 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2482 cmd->opcode = opcode;
2483 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2488 * Fetch and add the MAC address and type, with masks. This generates one or
2489 * two microinstructions, and returns the pointer to the last one.
2492 add_mac(ipfw_insn *cmd, char *av[])
2496 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2497 errx(EX_DATAERR, "MAC dst src");
2499 cmd->opcode = O_MACADDR2;
2500 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2502 mac = (ipfw_insn_mac *)cmd;
2503 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2504 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2505 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2510 add_mactype(ipfw_insn *cmd, char *av)
2513 errx(EX_DATAERR, "missing MAC type");
2514 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2515 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2516 cmd->opcode = O_MAC_TYPE;
2523 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2525 struct protoent *pe;
2529 proto = strtol(av, &ep, 10);
2530 if (*ep != '\0' || proto <= 0) {
2531 if ((pe = getprotobyname(av)) == NULL)
2533 proto = pe->p_proto;
2536 fill_cmd(cmd, O_PROTO, 0, proto);
2542 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2544 u_char proto = IPPROTO_IP;
2546 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2547 ; /* do not set O_IP4 nor O_IP6 */
2548 else if (strcmp(av, "ip4") == 0)
2549 /* explicit "just IPv4" rule */
2550 fill_cmd(cmd, O_IP4, 0, 0);
2551 else if (strcmp(av, "ip6") == 0) {
2552 /* explicit "just IPv6" rule */
2553 proto = IPPROTO_IPV6;
2554 fill_cmd(cmd, O_IP6, 0, 0);
2556 return add_proto0(cmd, av, protop);
2563 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2565 u_char proto = IPPROTO_IP;
2567 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2568 ; /* do not set O_IP4 nor O_IP6 */
2569 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2570 /* explicit "just IPv4" rule */
2571 fill_cmd(cmd, O_IP4, 0, 0);
2572 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2573 /* explicit "just IPv6" rule */
2574 proto = IPPROTO_IPV6;
2575 fill_cmd(cmd, O_IP6, 0, 0);
2577 return add_proto0(cmd, av, protop);
2584 add_srcip(ipfw_insn *cmd, char *av)
2586 fill_ip((ipfw_insn_ip *)cmd, av);
2587 if (cmd->opcode == O_IP_DST_SET) /* set */
2588 cmd->opcode = O_IP_SRC_SET;
2589 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2590 cmd->opcode = O_IP_SRC_LOOKUP;
2591 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2592 cmd->opcode = O_IP_SRC_ME;
2593 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2594 cmd->opcode = O_IP_SRC;
2595 else /* addr/mask */
2596 cmd->opcode = O_IP_SRC_MASK;
2601 add_dstip(ipfw_insn *cmd, char *av)
2603 fill_ip((ipfw_insn_ip *)cmd, av);
2604 if (cmd->opcode == O_IP_DST_SET) /* set */
2606 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2608 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2609 cmd->opcode = O_IP_DST_ME;
2610 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2611 cmd->opcode = O_IP_DST;
2612 else /* addr/mask */
2613 cmd->opcode = O_IP_DST_MASK;
2618 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2620 /* XXX "any" is trapped before. Perhaps "to" */
2621 if (_substrcmp(av, "any") == 0) {
2623 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2624 /* XXX todo: check that we have a protocol with ports */
2625 cmd->opcode = opcode;
2632 add_src(ipfw_insn *cmd, char *av, u_char proto)
2636 ipfw_insn *ret = NULL;
2638 if ((host = strdup(av)) == NULL)
2640 if ((ch = strrchr(host, '/')) != NULL)
2643 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2644 inet_pton(AF_INET6, host, &a) == 1)
2645 ret = add_srcip6(cmd, av);
2646 /* XXX: should check for IPv4, not !IPv6 */
2647 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2648 inet_pton(AF_INET6, host, &a) != 1))
2649 ret = add_srcip(cmd, av);
2650 if (ret == NULL && strcmp(av, "any") != 0)
2658 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2662 ipfw_insn *ret = NULL;
2664 if ((host = strdup(av)) == NULL)
2666 if ((ch = strrchr(host, '/')) != NULL)
2669 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2670 inet_pton(AF_INET6, host, &a) == 1)
2671 ret = add_dstip6(cmd, av);
2672 /* XXX: should check for IPv4, not !IPv6 */
2673 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2674 inet_pton(AF_INET6, host, &a) != 1))
2675 ret = add_dstip(cmd, av);
2676 if (ret == NULL && strcmp(av, "any") != 0)
2684 * Parse arguments and assemble the microinstructions which make up a rule.
2685 * Rules are added into the 'rulebuf' and then copied in the correct order
2686 * into the actual rule.
2688 * The syntax for a rule starts with the action, followed by
2689 * optional action parameters, and the various match patterns.
2690 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2691 * (generated if the rule includes a keep-state option), then the
2692 * various match patterns, log/altq actions, and the actual action.
2696 ipfw_add(char *av[])
2699 * rules are added into the 'rulebuf' and then copied in
2700 * the correct order into the actual rule.
2701 * Some things that need to go out of order (prob, action etc.)
2704 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2706 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2707 ipfw_insn *first_cmd; /* first match pattern */
2712 * various flags used to record that we entered some fields.
2714 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2715 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2720 int open_par = 0; /* open parenthesis ( */
2722 /* proto is here because it is used to fetch ports */
2723 u_char proto = IPPROTO_IP; /* default protocol */
2725 double match_prob = 1; /* match probability, default is always match */
2727 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2728 bzero(cmdbuf, sizeof(cmdbuf));
2729 bzero(rulebuf, sizeof(rulebuf));
2731 rule = (struct ip_fw *)rulebuf;
2732 cmd = (ipfw_insn *)cmdbuf;
2733 action = (ipfw_insn *)actbuf;
2737 /* [rule N] -- Rule number optional */
2738 if (av[0] && isdigit(**av)) {
2739 rule->rulenum = atoi(*av);
2743 /* [set N] -- set number (0..RESVD_SET), optional */
2744 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) {
2745 int set = strtoul(av[1], NULL, 10);
2746 if (set < 0 || set > RESVD_SET)
2747 errx(EX_DATAERR, "illegal set %s", av[1]);
2752 /* [prob D] -- match probability, optional */
2753 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2754 match_prob = strtod(av[1], NULL);
2756 if (match_prob <= 0 || match_prob > 1)
2757 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2761 /* action -- mandatory */
2762 NEED1("missing action");
2763 i = match_token(rule_actions, *av);
2765 action->len = 1; /* default */
2767 case TOK_CHECKSTATE:
2768 have_state = action;
2769 action->opcode = O_CHECK_STATE;
2773 action->opcode = O_ACCEPT;
2777 action->opcode = O_DENY;
2782 action->opcode = O_REJECT;
2783 action->arg1 = ICMP_UNREACH_HOST;
2787 action->opcode = O_REJECT;
2788 action->arg1 = ICMP_REJECT_RST;
2792 action->opcode = O_UNREACH6;
2793 action->arg1 = ICMP6_UNREACH_RST;
2797 action->opcode = O_REJECT;
2798 NEED1("missing reject code");
2799 fill_reject_code(&action->arg1, *av);
2804 action->opcode = O_UNREACH6;
2805 NEED1("missing unreach code");
2806 fill_unreach6_code(&action->arg1, *av);
2811 action->opcode = O_COUNT;
2815 action->opcode = O_NAT;
2816 action->len = F_INSN_SIZE(ipfw_insn_nat);
2820 action->opcode = O_QUEUE;
2823 action->opcode = O_PIPE;
2826 action->opcode = O_SKIPTO;
2829 action->opcode = O_NETGRAPH;
2832 action->opcode = O_NGTEE;
2835 action->opcode = O_DIVERT;
2838 action->opcode = O_TEE;
2841 action->opcode = O_CALLRETURN;
2844 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2845 if (isdigit(**av)) {
2846 action->arg1 = strtoul(*av, NULL, 10);
2847 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2848 errx(EX_DATAERR, "illegal argument for %s",
2850 } else if (_substrcmp(*av, "tablearg") == 0) {
2851 action->arg1 = IP_FW_TABLEARG;
2852 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2855 s = getservbyname(av[0], "divert");
2857 action->arg1 = ntohs(s->s_port);
2859 errx(EX_DATAERR, "illegal divert/tee port");
2861 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2866 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2869 NEED1("missing forward address[:port]");
2871 action->opcode = O_FORWARD_IP;
2872 action->len = F_INSN_SIZE(ipfw_insn_sa);
2875 * In the kernel we assume AF_INET and use only
2876 * sin_port and sin_addr. Remember to set sin_len as
2877 * the routing code seems to use it too.
2879 p->sa.sin_family = AF_INET;
2880 p->sa.sin_len = sizeof(struct sockaddr_in);
2883 * locate the address-port separator (':' or ',')
2885 s = strchr(*av, ':');
2887 s = strchr(*av, ',');
2890 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2893 "illegal forwarding port ``%s''", s);
2894 p->sa.sin_port = (u_short)i;
2896 if (_substrcmp(*av, "tablearg") == 0)
2897 p->sa.sin_addr.s_addr = INADDR_ANY;
2899 lookup_host(*av, &(p->sa.sin_addr));
2904 /* pretend it is a 'count' rule followed by the comment */
2905 action->opcode = O_COUNT;
2906 av--; /* go back... */
2912 size_t intsize = sizeof(int);
2914 action->opcode = O_SETFIB;
2915 NEED1("missing fib number");
2916 action->arg1 = strtoul(*av, NULL, 10);
2917 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
2918 errx(EX_DATAERR, "fibs not suported.\n");
2919 if (action->arg1 >= numfibs) /* Temporary */
2920 errx(EX_DATAERR, "fib too large.\n");
2926 action->opcode = O_REASS;
2930 fill_cmd(action, O_CALLRETURN, F_NOT, 0);
2934 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2936 action = next_cmd(action);
2939 * [altq queuename] -- altq tag, optional
2940 * [log [logamount N]] -- log, optional
2942 * If they exist, it go first in the cmdbuf, but then it is
2943 * skipped in the copy section to the end of the buffer.
2945 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
2950 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2955 "log cannot be specified more than once");
2956 have_log = (ipfw_insn *)c;
2957 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2958 cmd->opcode = O_LOG;
2959 if (av[0] && _substrcmp(*av, "logamount") == 0) {
2961 NEED1("logamount requires argument");
2965 "logamount must be positive");
2969 len = sizeof(c->max_log);
2970 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
2971 &c->max_log, &len, NULL, 0) == -1)
2972 errx(1, "sysctlbyname(\"%s\")",
2973 "net.inet.ip.fw.verbose_limit");
2981 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
2983 NEED1("missing altq queue name");
2986 "altq cannot be specified more than once");
2987 have_altq = (ipfw_insn *)a;
2988 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
2989 cmd->opcode = O_ALTQ;
2990 a->qid = altq_name_to_qid(*av);
3001 errx(EX_USAGE, "tag and untag cannot be "
3002 "specified more than once");
3003 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
3004 rule_action_params);
3006 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
3014 cmd = next_cmd(cmd);
3017 if (have_state) /* must be a check-state, we are done */
3020 #define OR_START(target) \
3021 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
3023 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
3026 if ( (av[0])[1] == '\0') { \
3037 strcmp(*av, ")") == 0 || \
3038 strcmp(*av, "}") == 0)) { \
3043 errx(EX_USAGE, "missing \")\"\n"); \
3047 if (av[0] && _substrcmp(*av, "not") == 0) { \
3048 if (cmd->len & F_NOT) \
3049 errx(EX_USAGE, "double \"not\" not allowed\n"); \
3050 cmd->len |= F_NOT; \
3054 #define OR_BLOCK(target) \
3055 if (av[0] && _substrcmp(*av, "or") == 0) { \
3056 if (prev == NULL || open_par == 0) \
3057 errx(EX_DATAERR, "invalid OR block"); \
3058 prev->len |= F_OR; \
3068 * MAC addresses, optional.
3069 * If we have this, we skip the part "proto from src to dst"
3070 * and jump straight to the option parsing.
3073 NEED1("missing protocol");
3074 if (_substrcmp(*av, "MAC") == 0 ||
3075 _substrcmp(*av, "mac") == 0) {
3076 av++; /* the "MAC" keyword */
3077 add_mac(cmd, av); /* exits in case of errors */
3078 cmd = next_cmd(cmd);
3079 av += 2; /* dst-mac and src-mac */
3081 NEED1("missing mac type");
3082 if (add_mactype(cmd, av[0]))
3083 cmd = next_cmd(cmd);
3084 av++; /* any or mac-type */
3090 * protocol, mandatory
3092 OR_START(get_proto);
3094 NEED1("missing protocol");
3095 if (add_proto_compat(cmd, *av, &proto)) {
3097 if (F_LEN(cmd) != 0) {
3099 cmd = next_cmd(cmd);
3101 } else if (first_cmd != cmd) {
3102 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3105 OR_BLOCK(get_proto);
3110 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3111 errx(EX_USAGE, "missing ``from''");
3115 * source IP, mandatory
3117 OR_START(source_ip);
3118 NOT_BLOCK; /* optional "not" */
3119 NEED1("missing source address");
3120 if (add_src(cmd, *av, proto)) {
3122 if (F_LEN(cmd) != 0) { /* ! any */
3124 cmd = next_cmd(cmd);
3127 errx(EX_USAGE, "bad source address %s", *av);
3128 OR_BLOCK(source_ip);
3131 * source ports, optional
3133 NOT_BLOCK; /* optional "not" */
3134 if ( av[0] != NULL ) {
3135 if (_substrcmp(*av, "any") == 0 ||
3136 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3138 if (F_LEN(cmd) != 0)
3139 cmd = next_cmd(cmd);
3146 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3147 errx(EX_USAGE, "missing ``to''");
3151 * destination, mandatory
3154 NOT_BLOCK; /* optional "not" */
3155 NEED1("missing dst address");
3156 if (add_dst(cmd, *av, proto)) {
3158 if (F_LEN(cmd) != 0) { /* ! any */
3160 cmd = next_cmd(cmd);
3163 errx( EX_USAGE, "bad destination address %s", *av);
3167 * dest. ports, optional
3169 NOT_BLOCK; /* optional "not" */
3171 if (_substrcmp(*av, "any") == 0 ||
3172 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3174 if (F_LEN(cmd) != 0)
3175 cmd = next_cmd(cmd);
3180 if (av[0] && first_cmd == cmd) {
3182 * nothing specified so far, store in the rule to ease
3188 while ( av[0] != NULL ) {
3190 ipfw_insn_u32 *cmd32; /* alias for cmd */
3193 cmd32 = (ipfw_insn_u32 *)cmd;
3195 if (*s == '!') { /* alternate syntax for NOT */
3196 if (cmd->len & F_NOT)
3197 errx(EX_USAGE, "double \"not\" not allowed\n");
3201 i = match_token(rule_options, s);
3205 if (cmd->len & F_NOT)
3206 errx(EX_USAGE, "double \"not\" not allowed\n");
3211 if (open_par == 0 || prev == NULL)
3212 errx(EX_USAGE, "invalid \"or\" block\n");
3216 case TOK_STARTBRACE:
3218 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3224 errx(EX_USAGE, "+missing \")\"\n");
3230 fill_cmd(cmd, O_IN, 0, 0);
3234 cmd->len ^= F_NOT; /* toggle F_NOT */
3235 fill_cmd(cmd, O_IN, 0, 0);
3239 fill_cmd(cmd, O_DIVERTED, 0, 3);
3242 case TOK_DIVERTEDLOOPBACK:
3243 fill_cmd(cmd, O_DIVERTED, 0, 1);
3246 case TOK_DIVERTEDOUTPUT:
3247 fill_cmd(cmd, O_DIVERTED, 0, 2);
3251 fill_cmd(cmd, O_FRAG, 0, 0);
3255 fill_cmd(cmd, O_LAYER2, 0, 0);
3261 NEED1("recv, xmit, via require interface name"
3263 fill_iface((ipfw_insn_if *)cmd, av[0]);
3265 if (F_LEN(cmd) == 0) /* not a valid address */
3268 cmd->opcode = O_XMIT;
3269 else if (i == TOK_RECV)
3270 cmd->opcode = O_RECV;
3271 else if (i == TOK_VIA)
3272 cmd->opcode = O_VIA;
3276 NEED1("icmptypes requires list of types");
3277 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3281 case TOK_ICMP6TYPES:
3282 NEED1("icmptypes requires list of types");
3283 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3288 NEED1("ipttl requires TTL");
3289 if (strpbrk(*av, "-,")) {
3290 if (!add_ports(cmd, *av, 0, O_IPTTL))
3291 errx(EX_DATAERR, "invalid ipttl %s", *av);
3293 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3298 NEED1("ipid requires id");
3299 if (strpbrk(*av, "-,")) {
3300 if (!add_ports(cmd, *av, 0, O_IPID))
3301 errx(EX_DATAERR, "invalid ipid %s", *av);
3303 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3308 NEED1("iplen requires length");
3309 if (strpbrk(*av, "-,")) {
3310 if (!add_ports(cmd, *av, 0, O_IPLEN))
3311 errx(EX_DATAERR, "invalid ip len %s", *av);
3313 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3318 NEED1("ipver requires version");
3319 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3323 case TOK_IPPRECEDENCE:
3324 NEED1("ipprecedence requires value");
3325 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3326 (strtoul(*av, NULL, 0) & 7) << 5);
3331 NEED1("missing argument for ipoptions");
3332 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3337 NEED1("missing argument for iptos");
3338 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3343 NEED1("uid requires argument");
3349 cmd->opcode = O_UID;
3350 uid = strtoul(*av, &end, 0);
3351 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3353 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3354 cmd32->d[0] = pwd->pw_uid;
3355 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3361 NEED1("gid requires argument");
3367 cmd->opcode = O_GID;
3368 gid = strtoul(*av, &end, 0);
3369 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3371 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3372 cmd32->d[0] = grp->gr_gid;
3373 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3379 NEED1("jail requires argument");
3384 cmd->opcode = O_JAIL;
3385 jid = (int)strtol(*av, &end, 0);
3386 if (jid < 0 || *end != '\0')
3387 errx(EX_DATAERR, "jail requires prison ID");
3388 cmd32->d[0] = (uint32_t)jid;
3389 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3395 fill_cmd(cmd, O_ESTAB, 0, 0);
3399 fill_cmd(cmd, O_TCPFLAGS, 0,
3400 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3403 case TOK_TCPDATALEN:
3404 NEED1("tcpdatalen requires length");
3405 if (strpbrk(*av, "-,")) {
3406 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3407 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3409 fill_cmd(cmd, O_TCPDATALEN, 0,
3410 strtoul(*av, NULL, 0));
3415 NEED1("missing argument for tcpoptions");
3416 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3422 NEED1("tcpseq/tcpack requires argument");
3423 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3424 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3425 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3430 NEED1("tcpwin requires length");
3431 fill_cmd(cmd, O_TCPWIN, 0,
3432 htons(strtoul(*av, NULL, 0)));
3437 NEED1("missing argument for tcpflags");
3438 cmd->opcode = O_TCPFLAGS;
3439 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3445 errx(EX_USAGE, "keep-state cannot be part "
3448 errx(EX_USAGE, "only one of keep-state "
3449 "and limit is allowed");
3451 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3455 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3460 "limit cannot be part of an or block");
3462 errx(EX_USAGE, "only one of keep-state and "
3463 "limit is allowed");
3466 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3467 cmd->opcode = O_LIMIT;
3468 c->limit_mask = c->conn_limit = 0;
3470 while ( av[0] != NULL ) {
3471 if ((val = match_token(limit_masks, *av)) <= 0)
3473 c->limit_mask |= val;
3477 if (c->limit_mask == 0)
3478 errx(EX_USAGE, "limit: missing limit mask");
3480 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3481 TOK_LIMIT, rule_options);
3488 NEED1("missing protocol");
3489 if (add_proto(cmd, *av, &proto)) {
3492 errx(EX_DATAERR, "invalid protocol ``%s''",
3497 NEED1("missing source IP");
3498 if (add_srcip(cmd, *av)) {
3504 NEED1("missing destination IP");
3505 if (add_dstip(cmd, *av)) {
3511 NEED1("missing source IP6");
3512 if (add_srcip6(cmd, *av)) {
3518 NEED1("missing destination IP6");
3519 if (add_dstip6(cmd, *av)) {
3525 NEED1("missing source port");
3526 if (_substrcmp(*av, "any") == 0 ||
3527 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3530 errx(EX_DATAERR, "invalid source port %s", *av);
3534 NEED1("missing destination port");
3535 if (_substrcmp(*av, "any") == 0 ||
3536 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3539 errx(EX_DATAERR, "invalid destination port %s",
3544 if (add_mac(cmd, av))
3549 NEED1("missing mac type");
3550 if (!add_mactype(cmd, *av))
3551 errx(EX_DATAERR, "invalid mac type %s", *av);
3555 case TOK_VERREVPATH:
3556 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3559 case TOK_VERSRCREACH:
3560 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3564 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3568 fill_cmd(cmd, O_IPSEC, 0, 0);
3572 fill_cmd(cmd, O_IP6, 0, 0);
3576 fill_cmd(cmd, O_IP4, 0, 0);
3580 fill_ext6hdr( cmd, *av );
3585 if (proto != IPPROTO_IPV6 )
3586 errx( EX_USAGE, "flow-id filter is active "
3587 "only for ipv6 protocol\n");
3588 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3593 fill_comment(cmd, av);
3598 if (av[0] && strpbrk(*av, "-,")) {
3599 if (!add_ports(cmd, *av, 0, O_TAGGED))
3600 errx(EX_DATAERR, "tagged: invalid tag"
3606 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3607 TOK_TAGGED, rule_options);
3608 fill_cmd(cmd, O_TAGGED, 0, tag);
3614 NEED1("fib requires fib number");
3615 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3619 fill_cmd(cmd, O_SOCKARG, 0, 0);
3623 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3627 if (!av[0] || !av[1])
3628 errx(EX_USAGE, "format: lookup argument tablenum");
3629 cmd->opcode = O_IP_DST_LOOKUP;
3630 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3631 i = match_token(rule_options, *av);
3632 for (j = 0; lookup_key[j] >= 0 ; j++) {
3633 if (i == lookup_key[j])
3636 if (lookup_key[j] <= 0)
3637 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3638 __PAST_END(c->d, 1) = j; // i converted to option
3640 cmd->arg1 = strtoul(*av, &p, 0);
3642 errx(EX_USAGE, "format: lookup argument tablenum");
3648 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3650 if (F_LEN(cmd) > 0) { /* prepare to advance */
3652 cmd = next_cmd(cmd);
3658 * Now copy stuff into the rule.
3659 * If we have a keep-state option, the first instruction
3660 * must be a PROBE_STATE (which is generated here).
3661 * If we have a LOG option, it was stored as the first command,
3662 * and now must be moved to the top of the action part.
3664 dst = (ipfw_insn *)rule->cmd;
3667 * First thing to write into the command stream is the match probability.
3669 if (match_prob != 1) { /* 1 means always match */
3670 dst->opcode = O_PROB;
3672 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3677 * generate O_PROBE_STATE if necessary
3679 if (have_state && have_state->opcode != O_CHECK_STATE) {
3680 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3681 dst = next_cmd(dst);
3684 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3685 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3688 switch (src->opcode) {
3696 bcopy(src, dst, i * sizeof(uint32_t));
3702 * put back the have_state command as last opcode
3704 if (have_state && have_state->opcode != O_CHECK_STATE) {
3705 i = F_LEN(have_state);
3706 bcopy(have_state, dst, i * sizeof(uint32_t));
3710 * start action section
3712 rule->act_ofs = dst - rule->cmd;
3714 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3716 i = F_LEN(have_log);
3717 bcopy(have_log, dst, i * sizeof(uint32_t));
3721 i = F_LEN(have_altq);
3722 bcopy(have_altq, dst, i * sizeof(uint32_t));
3726 i = F_LEN(have_tag);
3727 bcopy(have_tag, dst, i * sizeof(uint32_t));
3731 * copy all other actions
3733 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3735 bcopy(src, dst, i * sizeof(uint32_t));
3739 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3740 i = (char *)dst - (char *)rule;
3741 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3742 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3744 show_ipfw(rule, 0, 0);
3748 * clear the counters or the log counters.
3751 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3753 uint32_t arg, saved_arg;
3756 char const *name = optname ? "RESETLOG" : "ZERO";
3758 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3763 /* clear all entries */
3764 if (do_cmd(optname, NULL, 0) < 0)
3765 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3767 printf("%s.\n", optname == IP_FW_ZERO ?
3768 "Accounting cleared":"Logging counts reset");
3775 if (isdigit(**av)) {
3776 arg = strtonum(*av, 0, 0xffff, &errstr);
3779 "invalid rule number %s\n", *av);
3782 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3785 if (do_cmd(optname, &arg, sizeof(arg))) {
3786 warn("rule %u: setsockopt(IP_FW_%s)",
3788 failed = EX_UNAVAILABLE;
3789 } else if (!co.do_quiet)
3790 printf("Entry %d %s.\n", saved_arg,
3791 optname == IP_FW_ZERO ?
3792 "cleared" : "logging count reset");
3794 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3797 if (failed != EX_OK)
3802 ipfw_flush(int force)
3804 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3806 if (!force && !co.do_quiet) { /* need to ask user */
3809 printf("Are you sure? [yn] ");
3812 c = toupper(getc(stdin));
3813 while (c != '\n' && getc(stdin) != '\n')
3815 return; /* and do not flush */
3816 } while (c != 'Y' && c != 'N');
3818 if (c == 'N') /* user said no */
3825 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3827 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3828 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3829 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3830 } else if (do_cmd(cmd, NULL, 0) < 0)
3831 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3832 co.do_pipe ? "DUMMYNET" : "FW");
3834 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3838 static void table_list(ipfw_table_entry ent, int need_header);
3841 * This one handles all table-related commands
3842 * ipfw table N add addr[/masklen] [value]
3843 * ipfw table N delete addr[/masklen]
3844 * ipfw table {N | all} flush
3845 * ipfw table {N | all} list
3848 ipfw_table_handler(int ac, char *av[])
3850 ipfw_table_entry ent;
3856 uint32_t tables_max;
3858 len = sizeof(tables_max);
3859 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3861 #ifdef IPFW_TABLES_MAX
3862 warn("Warn: Failed to get the max tables number via sysctl. "
3863 "Using the compiled in defaults. \nThe reason was");
3864 tables_max = IPFW_TABLES_MAX;
3866 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
3871 if (ac && isdigit(**av)) {
3872 ent.tbl = atoi(*av);
3875 } else if (ac && _substrcmp(*av, "all") == 0) {
3880 errx(EX_USAGE, "table number or 'all' keyword required");
3881 if (ent.tbl >= tables_max)
3882 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3883 "value (%d)", tables_max - 1);
3884 NEED1("table needs command");
3885 if (is_all && _substrcmp(*av, "list") != 0
3886 && _substrcmp(*av, "flush") != 0)
3887 errx(EX_USAGE, "table number required");
3889 if (_substrcmp(*av, "add") == 0 ||
3890 _substrcmp(*av, "delete") == 0) {
3891 do_add = **av == 'a';
3894 errx(EX_USAGE, "IP address required");
3895 p = strchr(*av, '/');
3898 ent.masklen = atoi(p);
3899 if (ent.masklen > 32)
3900 errx(EX_DATAERR, "bad width ``%s''", p);
3903 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
3904 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3908 /* isdigit is a bit of a hack here.. */
3909 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
3910 ent.value = strtoul(*av, NULL, 0);
3912 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
3913 /* The value must be stored in host order *
3914 * so that the values < 65k can be distinguished */
3915 ent.value = ntohl(tval);
3917 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3922 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
3923 &ent, sizeof(ent)) < 0) {
3924 /* If running silent, don't bomb out on these errors. */
3925 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
3926 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
3927 do_add ? "ADD" : "DEL");
3928 /* In silent mode, react to a failed add by deleting */
3930 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
3931 if (do_cmd(IP_FW_TABLE_ADD,
3932 &ent, sizeof(ent)) < 0)
3934 "setsockopt(IP_FW_TABLE_ADD)");
3937 } else if (_substrcmp(*av, "flush") == 0) {
3938 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3940 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
3941 sizeof(ent.tbl)) < 0)
3942 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
3943 } while (++ent.tbl < a);
3944 } else if (_substrcmp(*av, "list") == 0) {
3945 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3947 table_list(ent, is_all);
3948 } while (++ent.tbl < a);
3950 errx(EX_USAGE, "invalid table command %s", *av);
3954 table_list(ipfw_table_entry ent, int need_header)
3962 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
3963 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
3965 /* If a is zero we have nothing to do, the table is empty. */
3969 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
3970 tbl = safe_calloc(1, l);
3972 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
3973 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
3974 if (tbl->cnt && need_header)
3975 printf("---table(%d)---\n", tbl->tbl);
3976 for (a = 0; a < tbl->cnt; a++) {
3978 tval = tbl->ent[a].value;
3979 if (co.do_value_as_ip) {
3981 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
3982 &tbl->ent[a].addr), 127);
3983 /* inet_ntoa expects network order */
3985 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
3986 inet_ntoa(*(struct in_addr *)&tval));
3988 printf("%s/%u %u\n",
3989 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
3990 tbl->ent[a].masklen, tval);