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 * The following is used to generate a printable argument for
319 * 64-bit numbers, irrespective of platform alignment and bit size.
320 * Because all the printf in this program use %llu as a format,
321 * we just return an unsigned long long, which is larger than
322 * we need in certain cases, but saves the hassle of using
323 * PRIu64 as a format specifier.
324 * We don't care about inlining, this is not performance critical code.
327 align_uint64(const uint64_t *pll)
331 bcopy (pll, &ret, sizeof(ret));
336 safe_calloc(size_t number, size_t size)
338 void *ret = calloc(number, size);
341 err(EX_OSERR, "calloc");
346 safe_realloc(void *ptr, size_t size)
348 void *ret = realloc(ptr, size);
351 err(EX_OSERR, "realloc");
356 * conditionally runs the command.
357 * Selected options or negative -> getsockopt
360 do_cmd(int optname, void *optval, uintptr_t optlen)
362 static int s = -1; /* the socket */
369 s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
371 err(EX_UNAVAILABLE, "socket");
373 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
374 optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
375 optname == IP_FW_TABLE_GETSIZE ||
376 optname == IP_FW_NAT_GET_CONFIG ||
378 optname == IP_FW_NAT_GET_LOG) {
381 i = getsockopt(s, IPPROTO_IP, optname, optval,
382 (socklen_t *)optlen);
384 i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
390 * match_token takes a table and a string, returns the value associated
391 * with the string (-1 in case of failure).
394 match_token(struct _s_x *table, char *string)
397 uint i = strlen(string);
399 for (pt = table ; i && pt->s != NULL ; pt++)
400 if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
406 * match_value takes a table and a value, returns the string associated
407 * with the value (NULL in case of failure).
410 match_value(struct _s_x *p, int value)
412 for (; p->s != NULL; p++)
419 * _substrcmp takes two strings and returns 1 if they do not match,
420 * and 0 if they match exactly or the first string is a sub-string
421 * of the second. A warning is printed to stderr in the case that the
422 * first string is a sub-string of the second.
424 * This function will be removed in the future through the usual
425 * deprecation process.
428 _substrcmp(const char *str1, const char* str2)
431 if (strncmp(str1, str2, strlen(str1)) != 0)
434 if (strlen(str1) != strlen(str2))
435 warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
441 * _substrcmp2 takes three strings and returns 1 if the first two do not match,
442 * and 0 if they match exactly or the second string is a sub-string
443 * of the first. A warning is printed to stderr in the case that the
444 * first string does not match the third.
446 * This function exists to warn about the bizzare construction
447 * strncmp(str, "by", 2) which is used to allow people to use a shotcut
448 * for "bytes". The problem is that in addition to accepting "by",
449 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
450 * other string beginning with "by".
452 * This function will be removed in the future through the usual
453 * deprecation process.
456 _substrcmp2(const char *str1, const char* str2, const char* str3)
459 if (strncmp(str1, str2, strlen(str2)) != 0)
462 if (strcmp(str1, str3) != 0)
463 warnx("DEPRECATED: '%s' matched '%s'",
469 * prints one port, symbolic or numeric
472 print_port(int proto, uint16_t port)
475 if (proto == IPPROTO_ETHERTYPE) {
478 if (co.do_resolv && (s = match_value(ether_types, port)) )
481 printf("0x%04x", port);
483 struct servent *se = NULL;
485 struct protoent *pe = getprotobynumber(proto);
487 se = getservbyport(htons(port), pe ? pe->p_name : NULL);
490 printf("%s", se->s_name);
496 static struct _s_x _port_name[] = {
497 {"dst-port", O_IP_DSTPORT},
498 {"src-port", O_IP_SRCPORT},
502 {"mac-type", O_MAC_TYPE},
503 {"tcpdatalen", O_TCPDATALEN},
504 {"tagged", O_TAGGED},
509 * Print the values in a list 16-bit items of the types above.
510 * XXX todo: add support for mask.
513 print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
515 uint16_t *p = cmd->ports;
520 sep = match_value(_port_name, opcode);
526 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
528 print_port(proto, p[0]);
531 print_port(proto, p[1]);
538 * Like strtol, but also translates service names into port numbers
539 * for some protocols.
541 * proto == -1 disables the protocol check;
542 * proto == IPPROTO_ETHERTYPE looks up an internal table
543 * proto == <some value in /etc/protocols> matches the values there.
544 * Returns *end == s in case the parameter is not found.
547 strtoport(char *s, char **end, int base, int proto)
553 *end = s; /* default - not found */
555 return 0; /* not found */
558 return strtol(s, end, base);
561 * find separator. '\\' escapes the next char.
563 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
564 if (*s1 == '\\' && s1[1] != '\0')
567 buf = safe_calloc(s1 - s + 1, 1);
570 * copy into a buffer skipping backslashes
572 for (p = s, i = 0; p != s1 ; p++)
577 if (proto == IPPROTO_ETHERTYPE) {
578 i = match_token(ether_types, buf);
580 if (i != -1) { /* found */
585 struct protoent *pe = NULL;
589 pe = getprotobynumber(proto);
591 se = getservbyname(buf, pe ? pe->p_name : NULL);
595 return ntohs(se->s_port);
598 return 0; /* not found */
602 * Fill the body of the command with the list of port ranges.
605 fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
607 uint16_t a, b, *p = cmd->ports;
612 a = strtoport(av, &s, 0, proto);
613 if (s == av) /* empty or invalid argument */
617 case '-': /* a range */
619 b = strtoport(av, &s, 0, proto);
620 /* Reject expressions like '1-abc' or '1-2-3'. */
621 if (s == av || (*s != ',' && *s != '\0'))
626 case ',': /* comma separated list */
631 warnx("port list: invalid separator <%c> in <%s>",
641 if (i + 1 > F_LEN_MASK)
642 errx(EX_DATAERR, "too many ports/ranges\n");
643 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
648 static struct _s_x icmpcodes[] = {
649 { "net", ICMP_UNREACH_NET },
650 { "host", ICMP_UNREACH_HOST },
651 { "protocol", ICMP_UNREACH_PROTOCOL },
652 { "port", ICMP_UNREACH_PORT },
653 { "needfrag", ICMP_UNREACH_NEEDFRAG },
654 { "srcfail", ICMP_UNREACH_SRCFAIL },
655 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
656 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
657 { "isolated", ICMP_UNREACH_ISOLATED },
658 { "net-prohib", ICMP_UNREACH_NET_PROHIB },
659 { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
660 { "tosnet", ICMP_UNREACH_TOSNET },
661 { "toshost", ICMP_UNREACH_TOSHOST },
662 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
663 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
664 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
669 fill_reject_code(u_short *codep, char *str)
674 val = strtoul(str, &s, 0);
675 if (s == str || *s != '\0' || val >= 0x100)
676 val = match_token(icmpcodes, str);
678 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
684 print_reject_code(uint16_t code)
686 char const *s = match_value(icmpcodes, code);
689 printf("unreach %s", s);
691 printf("unreach %u", code);
695 * Returns the number of bits set (from left) in a contiguous bitmask,
696 * or -1 if the mask is not contiguous.
697 * XXX this needs a proper fix.
698 * This effectively works on masks in big-endian (network) format.
699 * when compiled on little endian architectures.
701 * First bit is bit 7 of the first byte -- note, for MAC addresses,
702 * the first bit on the wire is bit 0 of the first byte.
703 * len is the max length in bits.
706 contigmask(uint8_t *p, int len)
710 for (i=0; i<len ; i++)
711 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
713 for (n=i+1; n < len; n++)
714 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
715 return -1; /* mask not contiguous */
720 * print flags set/clear in the two bitmasks passed as parameters.
721 * There is a specialized check for f_tcpflags.
724 print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
726 char const *comma = "";
728 uint8_t set = cmd->arg1 & 0xff;
729 uint8_t clear = (cmd->arg1 >> 8) & 0xff;
731 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
736 printf(" %s ", name);
737 for (i=0; list[i].x != 0; i++) {
738 if (set & list[i].x) {
740 printf("%s%s", comma, list[i].s);
743 if (clear & list[i].x) {
745 printf("%s!%s", comma, list[i].s);
752 * Print the ip address contained in a command.
755 print_ip(ipfw_insn_ip *cmd, char const *s)
757 struct hostent *he = NULL;
758 uint32_t len = F_LEN((ipfw_insn *)cmd);
759 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
761 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) {
763 const char *arg = "<invalid>";
765 if (d < sizeof(lookup_key)/sizeof(lookup_key[0]))
766 arg = match_value(rule_options, lookup_key[d]);
767 printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "",
771 printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
773 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
777 if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
778 cmd->o.opcode == O_IP_DST_LOOKUP) {
779 printf("table(%u", ((ipfw_insn *)cmd)->arg1);
780 if (len == F_INSN_SIZE(ipfw_insn_u32))
785 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
786 uint32_t x, *map = (uint32_t *)&(cmd->mask);
792 cmd->addr.s_addr = htonl(cmd->addr.s_addr);
793 printf("%s/%d", inet_ntoa(cmd->addr),
794 contigmask((uint8_t *)&x, 32));
795 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
796 x &= 0xff; /* base */
798 * Print bits and ranges.
799 * Locate first bit set (i), then locate first bit unset (j).
800 * If we have 3+ consecutive bits set, then print them as a
801 * range, otherwise only print the initial bit and rescan.
803 for (i=0; i < cmd->o.arg1; i++)
804 if (map[i/32] & (1<<(i & 31))) {
805 for (j=i+1; j < cmd->o.arg1; j++)
806 if (!(map[ j/32] & (1<<(j & 31))))
808 printf("%c%d", comma, i+x);
809 if (j>i+2) { /* range has at least 3 elements */
810 printf("-%d", j-1+x);
819 * len == 2 indicates a single IP, whereas lists of 1 or more
820 * addr/mask pairs have len = (2n+1). We convert len to n so we
821 * use that to count the number of entries.
823 for (len = len / 2; len > 0; len--, a += 2) {
824 int mb = /* mask length */
825 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
826 32 : contigmask((uint8_t *)&(a[1]), 32);
827 if (mb == 32 && co.do_resolv)
828 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
829 if (he != NULL) /* resolved to name */
830 printf("%s", he->h_name);
831 else if (mb == 0) /* any */
833 else { /* numeric IP followed by some kind of mask */
834 printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
836 printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
846 * prints a MAC address/mask pair
849 print_mac(uint8_t *addr, uint8_t *mask)
851 int l = contigmask(mask, 48);
856 printf(" %02x:%02x:%02x:%02x:%02x:%02x",
857 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
859 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
860 mask[0], mask[1], mask[2],
861 mask[3], mask[4], mask[5]);
868 fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
877 type = strtoul(av, &av, 0);
879 if (*av != ',' && *av != '\0')
880 errx(EX_DATAERR, "invalid ICMP type");
883 errx(EX_DATAERR, "ICMP type out of range");
885 cmd->d[0] |= 1 << type;
887 cmd->o.opcode = O_ICMPTYPE;
888 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
892 print_icmptypes(ipfw_insn_u32 *cmd)
897 printf(" icmptypes");
898 for (i = 0; i < 32; i++) {
899 if ( (cmd->d[0] & (1 << (i))) == 0)
901 printf("%c%d", sep, i);
907 * show_ipfw() prints the body of an ipfw rule.
908 * Because the standard rule has at least proto src_ip dst_ip, we use
909 * a helper function to produce these entries if not provided explicitly.
910 * The first argument is the list of fields we have, the second is
911 * the list of fields we want to be printed.
913 * Special cases if we have provided a MAC header:
914 * + if the rule does not contain IP addresses/ports, do not print them;
915 * + if the rule does not contain an IP proto, print "all" instead of "ip";
917 * Once we have 'have_options', IP header fields are printed as options.
919 #define HAVE_PROTO 0x0001
920 #define HAVE_SRCIP 0x0002
921 #define HAVE_DSTIP 0x0004
922 #define HAVE_PROTO4 0x0008
923 #define HAVE_PROTO6 0x0010
924 #define HAVE_OPTIONS 0x8000
926 #define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
928 show_prerequisites(int *flags, int want, int cmd __unused)
932 if ( (*flags & HAVE_IP) == HAVE_IP)
933 *flags |= HAVE_OPTIONS;
935 if ( !(*flags & HAVE_OPTIONS)) {
936 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
937 if ( (*flags & HAVE_PROTO4))
939 else if ( (*flags & HAVE_PROTO6))
944 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
946 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
953 show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
955 static int twidth = 0;
957 ipfw_insn *cmd, *tagptr = NULL;
958 const char *comment = NULL; /* ptr to comment if we have one */
959 int proto = 0; /* default */
960 int flags = 0; /* prerequisites */
961 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
962 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
963 int or_block = 0; /* we are in an or block */
964 uint32_t set_disable;
966 bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
968 if (set_disable & (1 << rule->set)) { /* disabled */
972 printf("# DISABLED ");
974 printf("%05u ", rule->rulenum);
976 if (pcwidth>0 || bcwidth>0)
977 printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
978 bcwidth, align_uint64(&rule->bcnt));
981 printf("%10u ", rule->timestamp);
982 else if (co.do_time == 1) {
984 time_t t = (time_t)0;
987 strcpy(timestr, ctime(&t));
988 *strchr(timestr, '\n') = '\0';
989 twidth = strlen(timestr);
991 if (rule->timestamp) {
992 t = _long_to_time(rule->timestamp);
994 strcpy(timestr, ctime(&t));
995 *strchr(timestr, '\n') = '\0';
996 printf("%s ", timestr);
998 printf("%*s", twidth, " ");
1003 printf("set %d ", rule->set);
1006 * print the optional "match probability"
1008 if (rule->cmd_len > 0) {
1010 if (cmd->opcode == O_PROB) {
1011 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
1012 double d = 1.0 * p->d[0];
1014 d = (d / 0x7fffffff);
1015 printf("prob %f ", d);
1020 * first print actions
1022 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
1023 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
1024 switch(cmd->opcode) {
1026 printf("check-state");
1027 flags = HAVE_IP; /* avoid printing anything else */
1043 if (cmd->arg1 == ICMP_REJECT_RST)
1045 else if (cmd->arg1 == ICMP_UNREACH_HOST)
1048 print_reject_code(cmd->arg1);
1052 if (cmd->arg1 == ICMP6_UNREACH_RST)
1055 print_unreach6_code(cmd->arg1);
1059 PRINT_UINT_ARG("skipto ", cmd->arg1);
1063 PRINT_UINT_ARG("pipe ", cmd->arg1);
1067 PRINT_UINT_ARG("queue ", cmd->arg1);
1071 PRINT_UINT_ARG("divert ", cmd->arg1);
1075 PRINT_UINT_ARG("tee ", cmd->arg1);
1079 PRINT_UINT_ARG("netgraph ", cmd->arg1);
1083 PRINT_UINT_ARG("ngtee ", cmd->arg1);
1088 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
1090 if (s->sa.sin_addr.s_addr == INADDR_ANY) {
1091 printf("fwd tablearg");
1093 printf("fwd %s", inet_ntoa(s->sa.sin_addr));
1096 printf(",%d", s->sa.sin_port);
1100 case O_LOG: /* O_LOG is printed last */
1101 logptr = (ipfw_insn_log *)cmd;
1104 case O_ALTQ: /* O_ALTQ is printed after O_LOG */
1105 altqptr = (ipfw_insn_altq *)cmd;
1113 PRINT_UINT_ARG("nat ", cmd->arg1);
1117 PRINT_UINT_ARG("setfib ", cmd->arg1);
1125 printf("** unrecognized action %d len %d ",
1126 cmd->opcode, cmd->len);
1130 if (logptr->max_log > 0)
1131 printf(" log logamount %d", logptr->max_log);
1137 print_altq_cmd(altqptr);
1141 if (tagptr->len & F_NOT)
1142 PRINT_UINT_ARG(" untag ", tagptr->arg1);
1144 PRINT_UINT_ARG(" tag ", tagptr->arg1);
1148 * then print the body.
1150 for (l = rule->act_ofs, cmd = rule->cmd ;
1151 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1152 if ((cmd->len & F_OR) || (cmd->len & F_NOT))
1154 if (cmd->opcode == O_IP4) {
1155 flags |= HAVE_PROTO4;
1157 } else if (cmd->opcode == O_IP6) {
1158 flags |= HAVE_PROTO6;
1162 if (rule->_pad & 1) { /* empty rules before options */
1163 if (!co.do_compact) {
1164 show_prerequisites(&flags, HAVE_PROTO, 0);
1165 printf(" from any to any");
1167 flags |= HAVE_IP | HAVE_OPTIONS;
1170 if (co.comment_only)
1173 for (l = rule->act_ofs, cmd = rule->cmd ;
1174 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
1176 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
1178 if (co.comment_only) {
1179 if (cmd->opcode != O_NOP)
1181 printf(" // %s\n", (char *)(cmd + 1));
1185 show_prerequisites(&flags, 0, cmd->opcode);
1187 switch(cmd->opcode) {
1189 break; /* done already */
1192 break; /* no need to print anything here */
1195 case O_IP_SRC_LOOKUP:
1199 show_prerequisites(&flags, HAVE_PROTO, 0);
1200 if (!(flags & HAVE_SRCIP))
1202 if ((cmd->len & F_OR) && !or_block)
1204 print_ip((ipfw_insn_ip *)cmd,
1205 (flags & HAVE_OPTIONS) ? " src-ip" : "");
1206 flags |= HAVE_SRCIP;
1210 case O_IP_DST_LOOKUP:
1214 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1215 if (!(flags & HAVE_DSTIP))
1217 if ((cmd->len & F_OR) && !or_block)
1219 print_ip((ipfw_insn_ip *)cmd,
1220 (flags & HAVE_OPTIONS) ? " dst-ip" : "");
1221 flags |= HAVE_DSTIP;
1225 case O_IP6_SRC_MASK:
1227 show_prerequisites(&flags, HAVE_PROTO, 0);
1228 if (!(flags & HAVE_SRCIP))
1230 if ((cmd->len & F_OR) && !or_block)
1232 print_ip6((ipfw_insn_ip6 *)cmd,
1233 (flags & HAVE_OPTIONS) ? " src-ip6" : "");
1234 flags |= HAVE_SRCIP | HAVE_PROTO;
1238 case O_IP6_DST_MASK:
1240 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1241 if (!(flags & HAVE_DSTIP))
1243 if ((cmd->len & F_OR) && !or_block)
1245 print_ip6((ipfw_insn_ip6 *)cmd,
1246 (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
1247 flags |= HAVE_DSTIP;
1251 print_flow6id( (ipfw_insn_u32 *) cmd );
1252 flags |= HAVE_OPTIONS;
1256 show_prerequisites(&flags, HAVE_IP, 0);
1258 show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
1259 if ((cmd->len & F_OR) && !or_block)
1261 if (cmd->len & F_NOT)
1263 print_newports((ipfw_insn_u16 *)cmd, proto,
1264 (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
1268 struct protoent *pe = NULL;
1270 if ((cmd->len & F_OR) && !or_block)
1272 if (cmd->len & F_NOT)
1275 pe = getprotobynumber(cmd->arg1);
1276 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
1277 !(flags & HAVE_PROTO))
1278 show_prerequisites(&flags,
1279 HAVE_IP | HAVE_OPTIONS, 0);
1280 if (flags & HAVE_OPTIONS)
1283 printf(" %s", pe->p_name);
1285 printf(" %u", cmd->arg1);
1287 flags |= HAVE_PROTO;
1290 default: /*options ... */
1291 if (!(cmd->len & (F_OR|F_NOT)))
1292 if (((cmd->opcode == O_IP6) &&
1293 (flags & HAVE_PROTO6)) ||
1294 ((cmd->opcode == O_IP4) &&
1295 (flags & HAVE_PROTO4)))
1297 show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
1298 if ((cmd->len & F_OR) && !or_block)
1300 if (cmd->len & F_NOT && cmd->opcode != O_IN)
1302 switch(cmd->opcode) {
1304 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
1307 print_mac(m->addr, m->mask);
1308 print_mac(m->addr + 6, m->mask + 6);
1313 print_newports((ipfw_insn_u16 *)cmd,
1314 IPPROTO_ETHERTYPE, cmd->opcode);
1323 printf(" fib %u", cmd->arg1 );
1327 printf(cmd->len & F_NOT ? " out" : " in");
1331 switch (cmd->arg1) {
1333 printf(" diverted");
1336 printf(" diverted-loopback");
1339 printf(" diverted-output");
1342 printf(" diverted-?<%u>", cmd->arg1);
1355 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
1357 if (cmd->opcode == O_XMIT)
1359 else if (cmd->opcode == O_RECV)
1361 else /* if (cmd->opcode == O_VIA) */
1363 if (cmdif->name[0] == '\0')
1365 inet_ntoa(cmdif->p.ip));
1367 printf(" %s %s", s, cmdif->name);
1372 if (F_LEN(cmd) == 1)
1373 printf(" ipid %u", cmd->arg1 );
1375 print_newports((ipfw_insn_u16 *)cmd, 0,
1380 if (F_LEN(cmd) == 1)
1381 printf(" ipttl %u", cmd->arg1 );
1383 print_newports((ipfw_insn_u16 *)cmd, 0,
1388 printf(" ipver %u", cmd->arg1 );
1391 case O_IPPRECEDENCE:
1392 printf(" ipprecedence %u", (cmd->arg1) >> 5 );
1396 if (F_LEN(cmd) == 1)
1397 printf(" iplen %u", cmd->arg1 );
1399 print_newports((ipfw_insn_u16 *)cmd, 0,
1404 print_flags("ipoptions", cmd, f_ipopts);
1408 print_flags("iptos", cmd, f_iptos);
1412 print_icmptypes((ipfw_insn_u32 *)cmd);
1416 printf(" established");
1420 if (F_LEN(cmd) == 1)
1421 printf(" tcpdatalen %u", cmd->arg1 );
1423 print_newports((ipfw_insn_u16 *)cmd, 0,
1428 print_flags("tcpflags", cmd, f_tcpflags);
1432 print_flags("tcpoptions", cmd, f_tcpopts);
1436 printf(" tcpwin %d", ntohs(cmd->arg1));
1440 printf(" tcpack %d", ntohl(cmd32->d[0]));
1444 printf(" tcpseq %d", ntohl(cmd32->d[0]));
1449 struct passwd *pwd = getpwuid(cmd32->d[0]);
1452 printf(" uid %s", pwd->pw_name);
1454 printf(" uid %u", cmd32->d[0]);
1460 struct group *grp = getgrgid(cmd32->d[0]);
1463 printf(" gid %s", grp->gr_name);
1465 printf(" gid %u", cmd32->d[0]);
1470 printf(" jail %d", cmd32->d[0]);
1474 printf(" verrevpath");
1478 printf(" versrcreach");
1482 printf(" antispoof");
1490 comment = (char *)(cmd + 1);
1494 printf(" keep-state");
1498 struct _s_x *p = limit_masks;
1499 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
1500 uint8_t x = c->limit_mask;
1501 char const *comma = " ";
1504 for (; p->x != 0 ; p++)
1505 if ((x & p->x) == p->x) {
1507 printf("%s%s", comma, p->s);
1510 PRINT_UINT_ARG(" ", c->conn_limit);
1523 print_icmp6types((ipfw_insn_u32 *)cmd);
1527 print_ext6hdr( (ipfw_insn *) cmd );
1531 if (F_LEN(cmd) == 1)
1532 PRINT_UINT_ARG(" tagged ", cmd->arg1);
1534 print_newports((ipfw_insn_u16 *)cmd, 0,
1539 printf(" [opcode %d len %d]",
1540 cmd->opcode, cmd->len);
1543 if (cmd->len & F_OR) {
1546 } else if (or_block) {
1551 show_prerequisites(&flags, HAVE_IP, 0);
1553 printf(" // %s", comment);
1558 show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
1560 struct protoent *pe;
1563 char buf[INET6_ADDRSTRLEN];
1565 if (!co.do_expired) {
1566 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
1569 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1570 printf("%05d", rulenum);
1571 if (pcwidth>0 || bcwidth>0)
1572 printf(" %*llu %*llu (%ds)", pcwidth,
1573 align_uint64(&d->pcnt), bcwidth,
1574 align_uint64(&d->bcnt), d->expire);
1575 switch (d->dyn_type) {
1576 case O_LIMIT_PARENT:
1577 printf(" PARENT %d", d->count);
1582 case O_KEEP_STATE: /* bidir, no mask */
1587 if ((pe = getprotobynumber(d->id.proto)) != NULL)
1588 printf(" %s", pe->p_name);
1590 printf(" proto %u", d->id.proto);
1592 if (d->id.addr_type == 4) {
1593 a.s_addr = htonl(d->id.src_ip);
1594 printf(" %s %d", inet_ntoa(a), d->id.src_port);
1596 a.s_addr = htonl(d->id.dst_ip);
1597 printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
1598 } else if (d->id.addr_type == 6) {
1599 printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
1600 sizeof(buf)), d->id.src_port);
1601 printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
1602 sizeof(buf)), d->id.dst_port);
1604 printf(" UNKNOWN <-> UNKNOWN\n");
1610 * This one handles all set-related commands
1611 * ipfw set { show | enable | disable }
1613 * ipfw set move X to Y
1614 * ipfw set move rule X to Y
1617 ipfw_sets_handler(char *av[])
1619 uint32_t set_disable, masks[2];
1622 uint8_t cmd, new_set;
1627 errx(EX_USAGE, "set needs command");
1628 if (_substrcmp(*av, "show") == 0) {
1633 nalloc = nbytes = sizeof(struct ip_fw);
1634 while (nbytes >= nalloc) {
1637 nalloc = nalloc * 2 + 200;
1639 data = safe_calloc(1, nbytes);
1640 if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
1641 err(EX_OSERR, "getsockopt(IP_FW_GET)");
1644 bcopy(&((struct ip_fw *)data)->next_rule,
1645 &set_disable, sizeof(set_disable));
1647 for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
1648 if ((set_disable & (1<<i))) {
1649 printf("%s %d", msg, i);
1652 msg = (set_disable) ? " enable" : "enable";
1653 for (i = 0; i < RESVD_SET; i++)
1654 if (!(set_disable & (1<<i))) {
1655 printf("%s %d", msg, i);
1659 } else if (_substrcmp(*av, "swap") == 0) {
1661 if ( av[0] == NULL || av[1] == NULL )
1662 errx(EX_USAGE, "set swap needs 2 set numbers\n");
1663 rulenum = atoi(av[0]);
1664 new_set = atoi(av[1]);
1665 if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
1666 errx(EX_DATAERR, "invalid set number %s\n", av[0]);
1667 if (!isdigit(*(av[1])) || new_set > RESVD_SET)
1668 errx(EX_DATAERR, "invalid set number %s\n", av[1]);
1669 masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
1670 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1671 } else if (_substrcmp(*av, "move") == 0) {
1673 if (av[0] && _substrcmp(*av, "rule") == 0) {
1678 if (av[0] == NULL || av[1] == NULL || av[2] == NULL ||
1679 av[3] != NULL || _substrcmp(av[1], "to") != 0)
1680 errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
1681 rulenum = atoi(av[0]);
1682 new_set = atoi(av[2]);
1683 if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
1684 (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
1685 errx(EX_DATAERR, "invalid source number %s\n", av[0]);
1686 if (!isdigit(*(av[2])) || new_set > RESVD_SET)
1687 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
1688 masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
1689 i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
1690 } else if (_substrcmp(*av, "disable") == 0 ||
1691 _substrcmp(*av, "enable") == 0 ) {
1692 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
1695 masks[0] = masks[1] = 0;
1698 if (isdigit(**av)) {
1700 if (i < 0 || i > RESVD_SET)
1702 "invalid set number %d\n", i);
1703 masks[which] |= (1<<i);
1704 } else if (_substrcmp(*av, "disable") == 0)
1706 else if (_substrcmp(*av, "enable") == 0)
1710 "invalid set command %s\n", *av);
1713 if ( (masks[0] & masks[1]) != 0 )
1715 "cannot enable and disable the same set\n");
1717 i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
1719 warn("set enable/disable: setsockopt(IP_FW_DEL)");
1721 errx(EX_USAGE, "invalid set command %s\n", *av);
1725 ipfw_sysctl_handler(char *av[], int which)
1729 if (av[0] == NULL) {
1730 warnx("missing keyword to enable/disable\n");
1731 } else if (_substrcmp(*av, "firewall") == 0) {
1732 sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
1733 &which, sizeof(which));
1734 } else if (_substrcmp(*av, "one_pass") == 0) {
1735 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
1736 &which, sizeof(which));
1737 } else if (_substrcmp(*av, "debug") == 0) {
1738 sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
1739 &which, sizeof(which));
1740 } else if (_substrcmp(*av, "verbose") == 0) {
1741 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
1742 &which, sizeof(which));
1743 } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
1744 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
1745 &which, sizeof(which));
1747 } else if (_substrcmp(*av, "altq") == 0) {
1748 altq_set_enabled(which);
1751 warnx("unrecognize enable/disable keyword: %s\n", *av);
1756 ipfw_list(int ac, char *av[], int show_counters)
1759 ipfw_dyn_rule *dynrules, *d;
1761 #define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
1764 int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
1765 int exitval = EX_OK;
1773 const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
1774 int nalloc = 1024; /* start somewhere... */
1779 fprintf(stderr, "Testing only, list disabled\n");
1783 dummynet_list(ac, av, show_counters);
1790 /* get rules or pipes from kernel, resizing array as necessary */
1793 while (nbytes >= nalloc) {
1794 nalloc = nalloc * 2 + 200;
1796 data = safe_realloc(data, nbytes);
1797 if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
1798 err(EX_OSERR, "getsockopt(IP_%s_GET)",
1799 co.do_pipe ? "DUMMYNET" : "FW");
1803 * Count static rules. They have variable size so we
1804 * need to scan the list to count them.
1806 for (nstat = 1, r = data, lim = (char *)data + nbytes;
1807 r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
1808 ++nstat, r = NEXT(r) )
1812 * Count dynamic rules. This is easier as they have
1816 dynrules = (ipfw_dyn_rule *)r ;
1817 n = (char *)r - (char *)data;
1818 ndyn = (nbytes - n) / sizeof *dynrules;
1820 /* if showing stats, figure out column widths ahead of time */
1821 bcwidth = pcwidth = 0;
1822 if (show_counters) {
1823 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1824 /* skip rules from another set */
1825 if (co.use_set && r->set != co.use_set - 1)
1828 /* packet counter */
1829 width = snprintf(NULL, 0, "%llu",
1830 align_uint64(&r->pcnt));
1831 if (width > pcwidth)
1835 width = snprintf(NULL, 0, "%llu",
1836 align_uint64(&r->bcnt));
1837 if (width > bcwidth)
1841 if (co.do_dynamic && ndyn) {
1842 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1844 /* skip rules from another set */
1845 bcopy((char *)&d->rule + sizeof(uint16_t),
1846 &set, sizeof(uint8_t));
1847 if (set != co.use_set - 1)
1850 width = snprintf(NULL, 0, "%llu",
1851 align_uint64(&d->pcnt));
1852 if (width > pcwidth)
1855 width = snprintf(NULL, 0, "%llu",
1856 align_uint64(&d->bcnt));
1857 if (width > bcwidth)
1861 /* if no rule numbers were specified, list all rules */
1863 for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
1864 if (co.use_set && r->set != co.use_set - 1)
1866 show_ipfw(r, pcwidth, bcwidth);
1869 if (co.do_dynamic && ndyn) {
1870 printf("## Dynamic rules (%d):\n", ndyn);
1871 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1873 bcopy((char *)&d->rule + sizeof(uint16_t),
1874 &set, sizeof(uint8_t));
1875 if (set != co.use_set - 1)
1878 show_dyn_ipfw(d, pcwidth, bcwidth);
1884 /* display specific rules requested on command line */
1886 for (lac = ac, lav = av; lac != 0; lac--) {
1887 /* convert command line rule # */
1888 last = rnum = strtoul(*lav++, &endptr, 10);
1890 last = strtoul(endptr+1, &endptr, 10);
1893 warnx("invalid rule number: %s", *(lav - 1));
1896 for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
1897 if (r->rulenum > last)
1899 if (co.use_set && r->set != co.use_set - 1)
1901 if (r->rulenum >= rnum && r->rulenum <= last) {
1902 show_ipfw(r, pcwidth, bcwidth);
1907 /* give precedence to other error(s) */
1908 if (exitval == EX_OK)
1909 exitval = EX_UNAVAILABLE;
1910 warnx("rule %lu does not exist", rnum);
1914 if (co.do_dynamic && ndyn) {
1915 printf("## Dynamic rules:\n");
1916 for (lac = ac, lav = av; lac != 0; lac--) {
1917 last = rnum = strtoul(*lav++, &endptr, 10);
1919 last = strtoul(endptr+1, &endptr, 10);
1921 /* already warned */
1923 for (n = 0, d = dynrules; n < ndyn; n++, d++) {
1926 bcopy(&d->rule, &rulenum, sizeof(rulenum));
1930 bcopy((char *)&d->rule + sizeof(uint16_t),
1931 &set, sizeof(uint8_t));
1932 if (set != co.use_set - 1)
1935 if (r->rulenum >= rnum && r->rulenum <= last)
1936 show_dyn_ipfw(d, pcwidth, bcwidth);
1946 if (exitval != EX_OK)
1952 lookup_host (char *host, struct in_addr *ipaddr)
1956 if (!inet_aton(host, ipaddr)) {
1957 if ((he = gethostbyname(host)) == NULL)
1959 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
1965 * fills the addr and mask fields in the instruction as appropriate from av.
1966 * Update length as appropriate.
1967 * The following formats are allowed:
1968 * me returns O_IP_*_ME
1969 * 1.2.3.4 single IP address
1970 * 1.2.3.4:5.6.7.8 address:mask
1971 * 1.2.3.4/24 address/mask
1972 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
1973 * We can have multiple comma-separated address/mask entries.
1976 fill_ip(ipfw_insn_ip *cmd, char *av)
1979 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
1981 cmd->o.len &= ~F_LEN_MASK; /* zero len */
1983 if (_substrcmp(av, "any") == 0)
1986 if (_substrcmp(av, "me") == 0) {
1987 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
1991 if (strncmp(av, "table(", 6) == 0) {
1992 char *p = strchr(av + 6, ',');
1996 cmd->o.opcode = O_IP_DST_LOOKUP;
1997 cmd->o.arg1 = strtoul(av + 6, NULL, 0);
1999 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2000 d[0] = strtoul(p, NULL, 0);
2002 cmd->o.len |= F_INSN_SIZE(ipfw_insn);
2008 * After the address we can have '/' or ':' indicating a mask,
2009 * ',' indicating another address follows, '{' indicating a
2010 * set of addresses of unspecified size.
2012 char *t = NULL, *p = strpbrk(av, "/:,{");
2019 if ((t = strpbrk(p, ",{")) != NULL) {
2026 if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
2027 errx(EX_NOHOST, "hostname ``%s'' unknown", av);
2030 if (!inet_aton(p, (struct in_addr *)&d[1]))
2031 errx(EX_DATAERR, "bad netmask ``%s''", p);
2036 d[1] = htonl(0); /* mask */
2037 else if (masklen > 32)
2038 errx(EX_DATAERR, "bad width ``%s''", p);
2040 d[1] = htonl(~0 << (32 - masklen));
2042 case '{': /* no mask, assume /24 and put back the '{' */
2043 d[1] = htonl(~0 << (32 - 24));
2047 case ',': /* single address plus continuation */
2050 case 0: /* initialization value */
2052 d[1] = htonl(~0); /* force /32 */
2055 d[0] &= d[1]; /* mask base address with mask */
2058 /* find next separator */
2060 p = strpbrk(p, ",{");
2061 if (p && *p == '{') {
2063 * We have a set of addresses. They are stored as follows:
2064 * arg1 is the set size (powers of 2, 2..256)
2065 * addr is the base address IN HOST FORMAT
2066 * mask.. is an array of arg1 bits (rounded up to
2067 * the next multiple of 32) with bits set
2068 * for each host in the map.
2070 uint32_t *map = (uint32_t *)&cmd->mask;
2072 int i = contigmask((uint8_t *)&(d[1]), 32);
2075 errx(EX_DATAERR, "address set cannot be in a list");
2076 if (i < 24 || i > 31)
2077 errx(EX_DATAERR, "invalid set with mask %d\n", i);
2078 cmd->o.arg1 = 1<<(32-i); /* map length */
2079 d[0] = ntohl(d[0]); /* base addr in host format */
2080 cmd->o.opcode = O_IP_DST_SET; /* default */
2081 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
2082 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
2083 map[i] = 0; /* clear map */
2087 high = low + cmd->o.arg1 - 1;
2089 * Here, i stores the previous value when we specify a range
2090 * of addresses within a mask, e.g. 45-63. i = -1 means we
2091 * have no previous value.
2093 i = -1; /* previous value in a range */
2094 while (isdigit(*av)) {
2096 int a = strtol(av, &s, 0);
2098 if (s == av) { /* no parameter */
2100 errx(EX_DATAERR, "set not closed\n");
2102 errx(EX_DATAERR, "incomplete range %d-", i);
2105 if (a < low || a > high)
2106 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
2109 if (i == -1) /* no previous in range */
2111 else { /* check that range is valid */
2113 errx(EX_DATAERR, "invalid range %d-%d",
2116 errx(EX_DATAERR, "double '-' in range");
2119 map[i/32] |= 1<<(i & 31);
2130 if (av) /* then *av must be a ',' */
2133 /* Check this entry */
2134 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
2136 * 'any' turns the entire list into a NOP.
2137 * 'not any' never matches, so it is removed from the
2138 * list unless it is the only item, in which case we
2141 if (cmd->o.len & F_NOT) { /* "not any" never matches */
2142 if (av == NULL && len == 0) /* only this entry */
2143 errx(EX_DATAERR, "not any never matches");
2145 /* else do nothing and skip this entry */
2148 /* A single IP can be stored in an optimized format */
2149 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) {
2150 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
2153 len += 2; /* two words... */
2156 if (len + 1 > F_LEN_MASK)
2157 errx(EX_DATAERR, "address list too long");
2158 cmd->o.len |= len+1;
2162 /* n2mask sets n bits of the mask */
2164 n2mask(struct in6_addr *mask, int n)
2166 static int minimask[9] =
2167 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
2170 memset(mask, 0, sizeof(struct in6_addr));
2171 p = (u_char *) mask;
2172 for (; n > 0; p++, n -= 8) {
2183 * helper function to process a set of flags and set bits in the
2184 * appropriate masks.
2187 fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
2188 struct _s_x *flags, char *p)
2190 uint8_t set=0, clear=0;
2193 char *q; /* points to the separator */
2195 uint8_t *which; /* mask we are working on */
2205 val = match_token(flags, p);
2207 errx(EX_DATAERR, "invalid flag %s", p);
2208 *which |= (uint8_t)val;
2211 cmd->opcode = opcode;
2212 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
2213 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
2218 ipfw_delete(char *av[])
2222 int exitval = EX_OK;
2226 NEED1("missing rule specification");
2227 if ( *av && _substrcmp(*av, "set") == 0) {
2228 /* Do not allow using the following syntax:
2229 * ipfw set N delete set M
2232 errx(EX_DATAERR, "invalid syntax");
2233 do_set = 1; /* delete set */
2238 while (*av && isdigit(**av)) {
2239 i = atoi(*av); av++;
2241 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
2243 exitval = EX_UNAVAILABLE;
2244 warn("rule %u not available", i);
2246 } else if (co.do_pipe) {
2247 exitval = ipfw_delete_pipe(co.do_pipe, i);
2250 rulenum = (i & 0xffff) | (5 << 24) |
2251 ((co.use_set - 1) << 16);
2253 rulenum = (i & 0xffff) | (do_set << 24);
2254 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
2256 exitval = EX_UNAVAILABLE;
2257 warn("rule %u: setsockopt(IP_FW_DEL)",
2262 if (exitval != EX_OK)
2268 * fill the interface structure. We do not check the name as we can
2269 * create interfaces dynamically, so checking them at insert time
2270 * makes relatively little sense.
2271 * Interface names containing '*', '?', or '[' are assumed to be shell
2272 * patterns which match interfaces.
2275 fill_iface(ipfw_insn_if *cmd, char *arg)
2277 cmd->name[0] = '\0';
2278 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
2280 /* Parse the interface or address */
2281 if (strcmp(arg, "any") == 0)
2282 cmd->o.len = 0; /* effectively ignore this command */
2283 else if (!isdigit(*arg)) {
2284 strlcpy(cmd->name, arg, sizeof(cmd->name));
2285 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
2286 } else if (!inet_aton(arg, &cmd->p.ip))
2287 errx(EX_DATAERR, "bad ip address ``%s''", arg);
2291 get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
2295 char *ap, *ptr, *optr;
2296 struct ether_addr *mac;
2297 const char *macset = "0123456789abcdefABCDEF:";
2299 if (strcmp(p, "any") == 0) {
2300 for (i = 0; i < ETHER_ADDR_LEN; i++)
2301 addr[i] = mask[i] = 0;
2305 optr = ptr = strdup(p);
2306 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
2308 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
2309 errx(EX_DATAERR, "Incorrect MAC address");
2310 bcopy(mac, addr, ETHER_ADDR_LEN);
2312 errx(EX_DATAERR, "Incorrect MAC address");
2314 if (ptr != NULL) { /* we have mask? */
2315 if (p[ptr - optr - 1] == '/') { /* mask len */
2316 long ml = strtol(ptr, &ap, 10);
2317 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0)
2318 errx(EX_DATAERR, "Incorrect mask length");
2319 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++)
2320 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml);
2323 if (strspn(ptr, macset) != l ||
2324 (mac = ether_aton(ptr)) == NULL)
2325 errx(EX_DATAERR, "Incorrect mask");
2326 bcopy(mac, mask, ETHER_ADDR_LEN);
2328 } else { /* default mask: ff:ff:ff:ff:ff:ff */
2329 for (i = 0; i < ETHER_ADDR_LEN; i++)
2332 for (i = 0; i < ETHER_ADDR_LEN; i++)
2339 * helper function, updates the pointer to cmd with the length
2340 * of the current command, and also cleans up the first word of
2341 * the new command in case it has been clobbered before.
2344 next_cmd(ipfw_insn *cmd)
2347 bzero(cmd, sizeof(*cmd));
2352 * Takes arguments and copies them into a comment
2355 fill_comment(ipfw_insn *cmd, char **av)
2358 char *p = (char *)(cmd + 1);
2360 cmd->opcode = O_NOP;
2361 cmd->len = (cmd->len & (F_NOT | F_OR));
2363 /* Compute length of comment string. */
2364 for (i = 0, l = 0; av[i] != NULL; i++)
2365 l += strlen(av[i]) + 1;
2370 "comment too long (max 80 chars)");
2372 cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
2373 for (i = 0; av[i] != NULL; i++) {
2382 * A function to fill simple commands of size 1.
2383 * Existing flags are preserved.
2386 fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
2388 cmd->opcode = opcode;
2389 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
2394 * Fetch and add the MAC address and type, with masks. This generates one or
2395 * two microinstructions, and returns the pointer to the last one.
2398 add_mac(ipfw_insn *cmd, char *av[])
2402 if ( ( av[0] == NULL ) || ( av[1] == NULL ) )
2403 errx(EX_DATAERR, "MAC dst src");
2405 cmd->opcode = O_MACADDR2;
2406 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
2408 mac = (ipfw_insn_mac *)cmd;
2409 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
2410 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
2411 &(mac->mask[ETHER_ADDR_LEN])); /* src */
2416 add_mactype(ipfw_insn *cmd, char *av)
2419 errx(EX_DATAERR, "missing MAC type");
2420 if (strcmp(av, "any") != 0) { /* we have a non-null type */
2421 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
2422 cmd->opcode = O_MAC_TYPE;
2429 add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
2431 struct protoent *pe;
2435 proto = strtol(av, &ep, 10);
2436 if (*ep != '\0' || proto <= 0) {
2437 if ((pe = getprotobyname(av)) == NULL)
2439 proto = pe->p_proto;
2442 fill_cmd(cmd, O_PROTO, 0, proto);
2448 add_proto(ipfw_insn *cmd, char *av, u_char *protop)
2450 u_char proto = IPPROTO_IP;
2452 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2453 ; /* do not set O_IP4 nor O_IP6 */
2454 else if (strcmp(av, "ip4") == 0)
2455 /* explicit "just IPv4" rule */
2456 fill_cmd(cmd, O_IP4, 0, 0);
2457 else if (strcmp(av, "ip6") == 0) {
2458 /* explicit "just IPv6" rule */
2459 proto = IPPROTO_IPV6;
2460 fill_cmd(cmd, O_IP6, 0, 0);
2462 return add_proto0(cmd, av, protop);
2469 add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
2471 u_char proto = IPPROTO_IP;
2473 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
2474 ; /* do not set O_IP4 nor O_IP6 */
2475 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
2476 /* explicit "just IPv4" rule */
2477 fill_cmd(cmd, O_IP4, 0, 0);
2478 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
2479 /* explicit "just IPv6" rule */
2480 proto = IPPROTO_IPV6;
2481 fill_cmd(cmd, O_IP6, 0, 0);
2483 return add_proto0(cmd, av, protop);
2490 add_srcip(ipfw_insn *cmd, char *av)
2492 fill_ip((ipfw_insn_ip *)cmd, av);
2493 if (cmd->opcode == O_IP_DST_SET) /* set */
2494 cmd->opcode = O_IP_SRC_SET;
2495 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2496 cmd->opcode = O_IP_SRC_LOOKUP;
2497 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2498 cmd->opcode = O_IP_SRC_ME;
2499 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2500 cmd->opcode = O_IP_SRC;
2501 else /* addr/mask */
2502 cmd->opcode = O_IP_SRC_MASK;
2507 add_dstip(ipfw_insn *cmd, char *av)
2509 fill_ip((ipfw_insn_ip *)cmd, av);
2510 if (cmd->opcode == O_IP_DST_SET) /* set */
2512 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
2514 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
2515 cmd->opcode = O_IP_DST_ME;
2516 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
2517 cmd->opcode = O_IP_DST;
2518 else /* addr/mask */
2519 cmd->opcode = O_IP_DST_MASK;
2524 add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
2526 /* XXX "any" is trapped before. Perhaps "to" */
2527 if (_substrcmp(av, "any") == 0) {
2529 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
2530 /* XXX todo: check that we have a protocol with ports */
2531 cmd->opcode = opcode;
2538 add_src(ipfw_insn *cmd, char *av, u_char proto)
2542 ipfw_insn *ret = NULL;
2544 if ((host = strdup(av)) == NULL)
2546 if ((ch = strrchr(host, '/')) != NULL)
2549 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2550 inet_pton(AF_INET6, host, &a) == 1)
2551 ret = add_srcip6(cmd, av);
2552 /* XXX: should check for IPv4, not !IPv6 */
2553 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2554 inet_pton(AF_INET6, host, &a) != 1))
2555 ret = add_srcip(cmd, av);
2556 if (ret == NULL && strcmp(av, "any") != 0)
2564 add_dst(ipfw_insn *cmd, char *av, u_char proto)
2568 ipfw_insn *ret = NULL;
2570 if ((host = strdup(av)) == NULL)
2572 if ((ch = strrchr(host, '/')) != NULL)
2575 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
2576 inet_pton(AF_INET6, host, &a) == 1)
2577 ret = add_dstip6(cmd, av);
2578 /* XXX: should check for IPv4, not !IPv6 */
2579 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
2580 inet_pton(AF_INET6, host, &a) != 1))
2581 ret = add_dstip(cmd, av);
2582 if (ret == NULL && strcmp(av, "any") != 0)
2590 * Parse arguments and assemble the microinstructions which make up a rule.
2591 * Rules are added into the 'rulebuf' and then copied in the correct order
2592 * into the actual rule.
2594 * The syntax for a rule starts with the action, followed by
2595 * optional action parameters, and the various match patterns.
2596 * In the assembled microcode, the first opcode must be an O_PROBE_STATE
2597 * (generated if the rule includes a keep-state option), then the
2598 * various match patterns, log/altq actions, and the actual action.
2602 ipfw_add(char *av[])
2605 * rules are added into the 'rulebuf' and then copied in
2606 * the correct order into the actual rule.
2607 * Some things that need to go out of order (prob, action etc.)
2610 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
2612 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
2613 ipfw_insn *first_cmd; /* first match pattern */
2618 * various flags used to record that we entered some fields.
2620 ipfw_insn *have_state = NULL; /* check-state or keep-state */
2621 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
2626 int open_par = 0; /* open parenthesis ( */
2628 /* proto is here because it is used to fetch ports */
2629 u_char proto = IPPROTO_IP; /* default protocol */
2631 double match_prob = 1; /* match probability, default is always match */
2633 bzero(actbuf, sizeof(actbuf)); /* actions go here */
2634 bzero(cmdbuf, sizeof(cmdbuf));
2635 bzero(rulebuf, sizeof(rulebuf));
2637 rule = (struct ip_fw *)rulebuf;
2638 cmd = (ipfw_insn *)cmdbuf;
2639 action = (ipfw_insn *)actbuf;
2643 /* [rule N] -- Rule number optional */
2644 if (av[0] && isdigit(**av)) {
2645 rule->rulenum = atoi(*av);
2649 /* [set N] -- set number (0..RESVD_SET), optional */
2650 if (av[0] && !av[1] && _substrcmp(*av, "set") == 0) {
2651 int set = strtoul(av[1], NULL, 10);
2652 if (set < 0 || set > RESVD_SET)
2653 errx(EX_DATAERR, "illegal set %s", av[1]);
2658 /* [prob D] -- match probability, optional */
2659 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) {
2660 match_prob = strtod(av[1], NULL);
2662 if (match_prob <= 0 || match_prob > 1)
2663 errx(EX_DATAERR, "illegal match prob. %s", av[1]);
2667 /* action -- mandatory */
2668 NEED1("missing action");
2669 i = match_token(rule_actions, *av);
2671 action->len = 1; /* default */
2673 case TOK_CHECKSTATE:
2674 have_state = action;
2675 action->opcode = O_CHECK_STATE;
2679 action->opcode = O_ACCEPT;
2683 action->opcode = O_DENY;
2688 action->opcode = O_REJECT;
2689 action->arg1 = ICMP_UNREACH_HOST;
2693 action->opcode = O_REJECT;
2694 action->arg1 = ICMP_REJECT_RST;
2698 action->opcode = O_UNREACH6;
2699 action->arg1 = ICMP6_UNREACH_RST;
2703 action->opcode = O_REJECT;
2704 NEED1("missing reject code");
2705 fill_reject_code(&action->arg1, *av);
2710 action->opcode = O_UNREACH6;
2711 NEED1("missing unreach code");
2712 fill_unreach6_code(&action->arg1, *av);
2717 action->opcode = O_COUNT;
2721 action->opcode = O_NAT;
2722 action->len = F_INSN_SIZE(ipfw_insn_nat);
2726 action->opcode = O_QUEUE;
2729 action->opcode = O_PIPE;
2732 action->opcode = O_SKIPTO;
2735 action->opcode = O_NETGRAPH;
2738 action->opcode = O_NGTEE;
2741 action->opcode = O_DIVERT;
2744 action->opcode = O_TEE;
2747 errx(EX_USAGE, "missing argument for %s", *(av - 1));
2748 if (isdigit(**av)) {
2749 action->arg1 = strtoul(*av, NULL, 10);
2750 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
2751 errx(EX_DATAERR, "illegal argument for %s",
2753 } else if (_substrcmp(*av, "tablearg") == 0) {
2754 action->arg1 = IP_FW_TABLEARG;
2755 } else if (i == TOK_DIVERT || i == TOK_TEE) {
2758 s = getservbyname(av[0], "divert");
2760 action->arg1 = ntohs(s->s_port);
2762 errx(EX_DATAERR, "illegal divert/tee port");
2764 errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
2769 ipfw_insn_sa *p = (ipfw_insn_sa *)action;
2772 NEED1("missing forward address[:port]");
2774 action->opcode = O_FORWARD_IP;
2775 action->len = F_INSN_SIZE(ipfw_insn_sa);
2778 * In the kernel we assume AF_INET and use only
2779 * sin_port and sin_addr. Remember to set sin_len as
2780 * the routing code seems to use it too.
2782 p->sa.sin_family = AF_INET;
2783 p->sa.sin_len = sizeof(struct sockaddr_in);
2786 * locate the address-port separator (':' or ',')
2788 s = strchr(*av, ':');
2790 s = strchr(*av, ',');
2793 i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
2796 "illegal forwarding port ``%s''", s);
2797 p->sa.sin_port = (u_short)i;
2799 if (_substrcmp(*av, "tablearg") == 0)
2800 p->sa.sin_addr.s_addr = INADDR_ANY;
2802 lookup_host(*av, &(p->sa.sin_addr));
2807 /* pretend it is a 'count' rule followed by the comment */
2808 action->opcode = O_COUNT;
2809 av--; /* go back... */
2815 size_t intsize = sizeof(int);
2817 action->opcode = O_SETFIB;
2818 NEED1("missing fib number");
2819 action->arg1 = strtoul(*av, NULL, 10);
2820 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
2821 errx(EX_DATAERR, "fibs not suported.\n");
2822 if (action->arg1 >= numfibs) /* Temporary */
2823 errx(EX_DATAERR, "fib too large.\n");
2829 action->opcode = O_REASS;
2833 errx(EX_DATAERR, "invalid action %s\n", av[-1]);
2835 action = next_cmd(action);
2838 * [altq queuename] -- altq tag, optional
2839 * [log [logamount N]] -- log, optional
2841 * If they exist, it go first in the cmdbuf, but then it is
2842 * skipped in the copy section to the end of the buffer.
2844 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) {
2849 ipfw_insn_log *c = (ipfw_insn_log *)cmd;
2854 "log cannot be specified more than once");
2855 have_log = (ipfw_insn *)c;
2856 cmd->len = F_INSN_SIZE(ipfw_insn_log);
2857 cmd->opcode = O_LOG;
2858 if (av[0] && _substrcmp(*av, "logamount") == 0) {
2860 NEED1("logamount requires argument");
2864 "logamount must be positive");
2868 len = sizeof(c->max_log);
2869 if (sysctlbyname("net.inet.ip.fw.verbose_limit",
2870 &c->max_log, &len, NULL, 0) == -1)
2871 errx(1, "sysctlbyname(\"%s\")",
2872 "net.inet.ip.fw.verbose_limit");
2880 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
2882 NEED1("missing altq queue name");
2885 "altq cannot be specified more than once");
2886 have_altq = (ipfw_insn *)a;
2887 cmd->len = F_INSN_SIZE(ipfw_insn_altq);
2888 cmd->opcode = O_ALTQ;
2889 a->qid = altq_name_to_qid(*av);
2900 errx(EX_USAGE, "tag and untag cannot be "
2901 "specified more than once");
2902 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i,
2903 rule_action_params);
2905 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
2913 cmd = next_cmd(cmd);
2916 if (have_state) /* must be a check-state, we are done */
2919 #define OR_START(target) \
2920 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \
2922 errx(EX_USAGE, "nested \"(\" not allowed\n"); \
2925 if ( (av[0])[1] == '\0') { \
2936 strcmp(*av, ")") == 0 || \
2937 strcmp(*av, "}") == 0)) { \
2942 errx(EX_USAGE, "missing \")\"\n"); \
2946 if (av[0] && _substrcmp(*av, "not") == 0) { \
2947 if (cmd->len & F_NOT) \
2948 errx(EX_USAGE, "double \"not\" not allowed\n"); \
2949 cmd->len |= F_NOT; \
2953 #define OR_BLOCK(target) \
2954 if (av[0] && _substrcmp(*av, "or") == 0) { \
2955 if (prev == NULL || open_par == 0) \
2956 errx(EX_DATAERR, "invalid OR block"); \
2957 prev->len |= F_OR; \
2967 * MAC addresses, optional.
2968 * If we have this, we skip the part "proto from src to dst"
2969 * and jump straight to the option parsing.
2972 NEED1("missing protocol");
2973 if (_substrcmp(*av, "MAC") == 0 ||
2974 _substrcmp(*av, "mac") == 0) {
2975 av++; /* the "MAC" keyword */
2976 add_mac(cmd, av); /* exits in case of errors */
2977 cmd = next_cmd(cmd);
2978 av += 2; /* dst-mac and src-mac */
2980 NEED1("missing mac type");
2981 if (add_mactype(cmd, av[0]))
2982 cmd = next_cmd(cmd);
2983 av++; /* any or mac-type */
2989 * protocol, mandatory
2991 OR_START(get_proto);
2993 NEED1("missing protocol");
2994 if (add_proto_compat(cmd, *av, &proto)) {
2996 if (F_LEN(cmd) != 0) {
2998 cmd = next_cmd(cmd);
3000 } else if (first_cmd != cmd) {
3001 errx(EX_DATAERR, "invalid protocol ``%s''", *av);
3004 OR_BLOCK(get_proto);
3009 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0)
3010 errx(EX_USAGE, "missing ``from''");
3014 * source IP, mandatory
3016 OR_START(source_ip);
3017 NOT_BLOCK; /* optional "not" */
3018 NEED1("missing source address");
3019 if (add_src(cmd, *av, proto)) {
3021 if (F_LEN(cmd) != 0) { /* ! any */
3023 cmd = next_cmd(cmd);
3026 errx(EX_USAGE, "bad source address %s", *av);
3027 OR_BLOCK(source_ip);
3030 * source ports, optional
3032 NOT_BLOCK; /* optional "not" */
3033 if ( av[0] != NULL ) {
3034 if (_substrcmp(*av, "any") == 0 ||
3035 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3037 if (F_LEN(cmd) != 0)
3038 cmd = next_cmd(cmd);
3045 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 )
3046 errx(EX_USAGE, "missing ``to''");
3050 * destination, mandatory
3053 NOT_BLOCK; /* optional "not" */
3054 NEED1("missing dst address");
3055 if (add_dst(cmd, *av, proto)) {
3057 if (F_LEN(cmd) != 0) { /* ! any */
3059 cmd = next_cmd(cmd);
3062 errx( EX_USAGE, "bad destination address %s", *av);
3066 * dest. ports, optional
3068 NOT_BLOCK; /* optional "not" */
3070 if (_substrcmp(*av, "any") == 0 ||
3071 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3073 if (F_LEN(cmd) != 0)
3074 cmd = next_cmd(cmd);
3079 if (av[0] && first_cmd == cmd) {
3081 * nothing specified so far, store in the rule to ease
3087 while ( av[0] != NULL ) {
3089 ipfw_insn_u32 *cmd32; /* alias for cmd */
3092 cmd32 = (ipfw_insn_u32 *)cmd;
3094 if (*s == '!') { /* alternate syntax for NOT */
3095 if (cmd->len & F_NOT)
3096 errx(EX_USAGE, "double \"not\" not allowed\n");
3100 i = match_token(rule_options, s);
3104 if (cmd->len & F_NOT)
3105 errx(EX_USAGE, "double \"not\" not allowed\n");
3110 if (open_par == 0 || prev == NULL)
3111 errx(EX_USAGE, "invalid \"or\" block\n");
3115 case TOK_STARTBRACE:
3117 errx(EX_USAGE, "+nested \"(\" not allowed\n");
3123 errx(EX_USAGE, "+missing \")\"\n");
3129 fill_cmd(cmd, O_IN, 0, 0);
3133 cmd->len ^= F_NOT; /* toggle F_NOT */
3134 fill_cmd(cmd, O_IN, 0, 0);
3138 fill_cmd(cmd, O_DIVERTED, 0, 3);
3141 case TOK_DIVERTEDLOOPBACK:
3142 fill_cmd(cmd, O_DIVERTED, 0, 1);
3145 case TOK_DIVERTEDOUTPUT:
3146 fill_cmd(cmd, O_DIVERTED, 0, 2);
3150 fill_cmd(cmd, O_FRAG, 0, 0);
3154 fill_cmd(cmd, O_LAYER2, 0, 0);
3160 NEED1("recv, xmit, via require interface name"
3162 fill_iface((ipfw_insn_if *)cmd, av[0]);
3164 if (F_LEN(cmd) == 0) /* not a valid address */
3167 cmd->opcode = O_XMIT;
3168 else if (i == TOK_RECV)
3169 cmd->opcode = O_RECV;
3170 else if (i == TOK_VIA)
3171 cmd->opcode = O_VIA;
3175 NEED1("icmptypes requires list of types");
3176 fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
3180 case TOK_ICMP6TYPES:
3181 NEED1("icmptypes requires list of types");
3182 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
3187 NEED1("ipttl requires TTL");
3188 if (strpbrk(*av, "-,")) {
3189 if (!add_ports(cmd, *av, 0, O_IPTTL))
3190 errx(EX_DATAERR, "invalid ipttl %s", *av);
3192 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
3197 NEED1("ipid requires id");
3198 if (strpbrk(*av, "-,")) {
3199 if (!add_ports(cmd, *av, 0, O_IPID))
3200 errx(EX_DATAERR, "invalid ipid %s", *av);
3202 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
3207 NEED1("iplen requires length");
3208 if (strpbrk(*av, "-,")) {
3209 if (!add_ports(cmd, *av, 0, O_IPLEN))
3210 errx(EX_DATAERR, "invalid ip len %s", *av);
3212 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
3217 NEED1("ipver requires version");
3218 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
3222 case TOK_IPPRECEDENCE:
3223 NEED1("ipprecedence requires value");
3224 fill_cmd(cmd, O_IPPRECEDENCE, 0,
3225 (strtoul(*av, NULL, 0) & 7) << 5);
3230 NEED1("missing argument for ipoptions");
3231 fill_flags(cmd, O_IPOPT, f_ipopts, *av);
3236 NEED1("missing argument for iptos");
3237 fill_flags(cmd, O_IPTOS, f_iptos, *av);
3242 NEED1("uid requires argument");
3248 cmd->opcode = O_UID;
3249 uid = strtoul(*av, &end, 0);
3250 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
3252 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
3253 cmd32->d[0] = pwd->pw_uid;
3254 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3260 NEED1("gid requires argument");
3266 cmd->opcode = O_GID;
3267 gid = strtoul(*av, &end, 0);
3268 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
3270 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
3271 cmd32->d[0] = grp->gr_gid;
3272 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3278 NEED1("jail requires argument");
3283 cmd->opcode = O_JAIL;
3284 jid = (int)strtol(*av, &end, 0);
3285 if (jid < 0 || *end != '\0')
3286 errx(EX_DATAERR, "jail requires prison ID");
3287 cmd32->d[0] = (uint32_t)jid;
3288 cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
3294 fill_cmd(cmd, O_ESTAB, 0, 0);
3298 fill_cmd(cmd, O_TCPFLAGS, 0,
3299 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
3302 case TOK_TCPDATALEN:
3303 NEED1("tcpdatalen requires length");
3304 if (strpbrk(*av, "-,")) {
3305 if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
3306 errx(EX_DATAERR, "invalid tcpdata len %s", *av);
3308 fill_cmd(cmd, O_TCPDATALEN, 0,
3309 strtoul(*av, NULL, 0));
3314 NEED1("missing argument for tcpoptions");
3315 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
3321 NEED1("tcpseq/tcpack requires argument");
3322 cmd->len = F_INSN_SIZE(ipfw_insn_u32);
3323 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
3324 cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
3329 NEED1("tcpwin requires length");
3330 fill_cmd(cmd, O_TCPWIN, 0,
3331 htons(strtoul(*av, NULL, 0)));
3336 NEED1("missing argument for tcpflags");
3337 cmd->opcode = O_TCPFLAGS;
3338 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
3344 errx(EX_USAGE, "keep-state cannot be part "
3347 errx(EX_USAGE, "only one of keep-state "
3348 "and limit is allowed");
3350 fill_cmd(cmd, O_KEEP_STATE, 0, 0);
3354 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
3359 "limit cannot be part of an or block");
3361 errx(EX_USAGE, "only one of keep-state and "
3362 "limit is allowed");
3365 cmd->len = F_INSN_SIZE(ipfw_insn_limit);
3366 cmd->opcode = O_LIMIT;
3367 c->limit_mask = c->conn_limit = 0;
3369 while ( av[0] != NULL ) {
3370 if ((val = match_token(limit_masks, *av)) <= 0)
3372 c->limit_mask |= val;
3376 if (c->limit_mask == 0)
3377 errx(EX_USAGE, "limit: missing limit mask");
3379 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX,
3380 TOK_LIMIT, rule_options);
3387 NEED1("missing protocol");
3388 if (add_proto(cmd, *av, &proto)) {
3391 errx(EX_DATAERR, "invalid protocol ``%s''",
3396 NEED1("missing source IP");
3397 if (add_srcip(cmd, *av)) {
3403 NEED1("missing destination IP");
3404 if (add_dstip(cmd, *av)) {
3410 NEED1("missing source IP6");
3411 if (add_srcip6(cmd, *av)) {
3417 NEED1("missing destination IP6");
3418 if (add_dstip6(cmd, *av)) {
3424 NEED1("missing source port");
3425 if (_substrcmp(*av, "any") == 0 ||
3426 add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
3429 errx(EX_DATAERR, "invalid source port %s", *av);
3433 NEED1("missing destination port");
3434 if (_substrcmp(*av, "any") == 0 ||
3435 add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
3438 errx(EX_DATAERR, "invalid destination port %s",
3443 if (add_mac(cmd, av))
3448 NEED1("missing mac type");
3449 if (!add_mactype(cmd, *av))
3450 errx(EX_DATAERR, "invalid mac type %s", *av);
3454 case TOK_VERREVPATH:
3455 fill_cmd(cmd, O_VERREVPATH, 0, 0);
3458 case TOK_VERSRCREACH:
3459 fill_cmd(cmd, O_VERSRCREACH, 0, 0);
3463 fill_cmd(cmd, O_ANTISPOOF, 0, 0);
3467 fill_cmd(cmd, O_IPSEC, 0, 0);
3471 fill_cmd(cmd, O_IP6, 0, 0);
3475 fill_cmd(cmd, O_IP4, 0, 0);
3479 fill_ext6hdr( cmd, *av );
3484 if (proto != IPPROTO_IPV6 )
3485 errx( EX_USAGE, "flow-id filter is active "
3486 "only for ipv6 protocol\n");
3487 fill_flow6( (ipfw_insn_u32 *) cmd, *av );
3492 fill_comment(cmd, av);
3497 if (av[0] && strpbrk(*av, "-,")) {
3498 if (!add_ports(cmd, *av, 0, O_TAGGED))
3499 errx(EX_DATAERR, "tagged: invalid tag"
3505 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX,
3506 TOK_TAGGED, rule_options);
3507 fill_cmd(cmd, O_TAGGED, 0, tag);
3513 NEED1("fib requires fib number");
3514 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
3519 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd;
3523 if (!av[0] || !av[1])
3524 errx(EX_USAGE, "format: lookup argument tablenum");
3525 cmd->opcode = O_IP_DST_LOOKUP;
3526 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
3527 i = match_token(rule_options, *av);
3528 for (j = 0; lookup_key[j] >= 0 ; j++) {
3529 if (i == lookup_key[j])
3532 if (lookup_key[j] <= 0)
3533 errx(EX_USAGE, "format: cannot lookup on %s", *av);
3534 c->d[1] = j; // i converted to option
3536 cmd->arg1 = strtoul(*av, &p, 0);
3538 errx(EX_USAGE, "format: lookup argument tablenum");
3544 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
3546 if (F_LEN(cmd) > 0) { /* prepare to advance */
3548 cmd = next_cmd(cmd);
3554 * Now copy stuff into the rule.
3555 * If we have a keep-state option, the first instruction
3556 * must be a PROBE_STATE (which is generated here).
3557 * If we have a LOG option, it was stored as the first command,
3558 * and now must be moved to the top of the action part.
3560 dst = (ipfw_insn *)rule->cmd;
3563 * First thing to write into the command stream is the match probability.
3565 if (match_prob != 1) { /* 1 means always match */
3566 dst->opcode = O_PROB;
3568 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
3573 * generate O_PROBE_STATE if necessary
3575 if (have_state && have_state->opcode != O_CHECK_STATE) {
3576 fill_cmd(dst, O_PROBE_STATE, 0, 0);
3577 dst = next_cmd(dst);
3580 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
3581 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
3584 switch (src->opcode) {
3592 bcopy(src, dst, i * sizeof(uint32_t));
3598 * put back the have_state command as last opcode
3600 if (have_state && have_state->opcode != O_CHECK_STATE) {
3601 i = F_LEN(have_state);
3602 bcopy(have_state, dst, i * sizeof(uint32_t));
3606 * start action section
3608 rule->act_ofs = dst - rule->cmd;
3610 /* put back O_LOG, O_ALTQ, O_TAG if necessary */
3612 i = F_LEN(have_log);
3613 bcopy(have_log, dst, i * sizeof(uint32_t));
3617 i = F_LEN(have_altq);
3618 bcopy(have_altq, dst, i * sizeof(uint32_t));
3622 i = F_LEN(have_tag);
3623 bcopy(have_tag, dst, i * sizeof(uint32_t));
3627 * copy all other actions
3629 for (src = (ipfw_insn *)actbuf; src != action; src += i) {
3631 bcopy(src, dst, i * sizeof(uint32_t));
3635 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
3636 i = (char *)dst - (char *)rule;
3637 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
3638 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
3640 show_ipfw(rule, 0, 0);
3644 * clear the counters or the log counters.
3647 ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
3649 uint32_t arg, saved_arg;
3652 char const *name = optname ? "RESETLOG" : "ZERO";
3654 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
3659 /* clear all entries */
3660 if (do_cmd(optname, NULL, 0) < 0)
3661 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
3663 printf("%s.\n", optname == IP_FW_ZERO ?
3664 "Accounting cleared":"Logging counts reset");
3671 if (isdigit(**av)) {
3672 arg = strtonum(*av, 0, 0xffff, &errstr);
3675 "invalid rule number %s\n", *av);
3678 arg |= (1 << 24) | ((co.use_set - 1) << 16);
3681 if (do_cmd(optname, &arg, sizeof(arg))) {
3682 warn("rule %u: setsockopt(IP_FW_%s)",
3684 failed = EX_UNAVAILABLE;
3685 } else if (!co.do_quiet)
3686 printf("Entry %d %s.\n", saved_arg,
3687 optname == IP_FW_ZERO ?
3688 "cleared" : "logging count reset");
3690 errx(EX_USAGE, "invalid rule number ``%s''", *av);
3693 if (failed != EX_OK)
3698 ipfw_flush(int force)
3700 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
3702 if (!force && !co.do_quiet) { /* need to ask user */
3705 printf("Are you sure? [yn] ");
3708 c = toupper(getc(stdin));
3709 while (c != '\n' && getc(stdin) != '\n')
3711 return; /* and do not flush */
3712 } while (c != 'Y' && c != 'N');
3714 if (c == 'N') /* user said no */
3721 /* `ipfw set N flush` - is the same that `ipfw delete set N` */
3723 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
3724 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
3725 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
3726 } else if (do_cmd(cmd, NULL, 0) < 0)
3727 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
3728 co.do_pipe ? "DUMMYNET" : "FW");
3730 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
3734 static void table_list(ipfw_table_entry ent, int need_header);
3737 * This one handles all table-related commands
3738 * ipfw table N add addr[/masklen] [value]
3739 * ipfw table N delete addr[/masklen]
3740 * ipfw table {N | all} flush
3741 * ipfw table {N | all} list
3744 ipfw_table_handler(int ac, char *av[])
3746 ipfw_table_entry ent;
3752 uint32_t tables_max;
3754 len = sizeof(tables_max);
3755 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
3757 #ifdef IPFW_TABLES_MAX
3758 warn("Warn: Failed to get the max tables number via sysctl. "
3759 "Using the compiled in defaults. \nThe reason was");
3760 tables_max = IPFW_TABLES_MAX;
3762 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
3767 if (ac && isdigit(**av)) {
3768 ent.tbl = atoi(*av);
3771 } else if (ac && _substrcmp(*av, "all") == 0) {
3776 errx(EX_USAGE, "table number or 'all' keyword required");
3777 if (ent.tbl >= tables_max)
3778 errx(EX_USAGE, "The table number exceeds the maximum allowed "
3779 "value (%d)", tables_max - 1);
3780 NEED1("table needs command");
3781 if (is_all && _substrcmp(*av, "list") != 0
3782 && _substrcmp(*av, "flush") != 0)
3783 errx(EX_USAGE, "table number required");
3785 if (_substrcmp(*av, "add") == 0 ||
3786 _substrcmp(*av, "delete") == 0) {
3787 do_add = **av == 'a';
3790 errx(EX_USAGE, "IP address required");
3791 p = strchr(*av, '/');
3794 ent.masklen = atoi(p);
3795 if (ent.masklen > 32)
3796 errx(EX_DATAERR, "bad width ``%s''", p);
3799 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
3800 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3804 /* isdigit is a bit of a hack here.. */
3805 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
3806 ent.value = strtoul(*av, NULL, 0);
3808 if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
3809 /* The value must be stored in host order *
3810 * so that the values < 65k can be distinguished */
3811 ent.value = ntohl(tval);
3813 errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
3818 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
3819 &ent, sizeof(ent)) < 0) {
3820 /* If running silent, don't bomb out on these errors. */
3821 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
3822 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
3823 do_add ? "ADD" : "DEL");
3824 /* In silent mode, react to a failed add by deleting */
3826 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
3827 if (do_cmd(IP_FW_TABLE_ADD,
3828 &ent, sizeof(ent)) < 0)
3830 "setsockopt(IP_FW_TABLE_ADD)");
3833 } else if (_substrcmp(*av, "flush") == 0) {
3834 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3836 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
3837 sizeof(ent.tbl)) < 0)
3838 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
3839 } while (++ent.tbl < a);
3840 } else if (_substrcmp(*av, "list") == 0) {
3841 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1);
3843 table_list(ent, is_all);
3844 } while (++ent.tbl < a);
3846 errx(EX_USAGE, "invalid table command %s", *av);
3850 table_list(ipfw_table_entry ent, int need_header)
3858 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
3859 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
3861 /* If a is zero we have nothing to do, the table is empty. */
3865 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
3866 tbl = safe_calloc(1, l);
3868 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
3869 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
3870 if (tbl->cnt && need_header)
3871 printf("---table(%d)---\n", tbl->tbl);
3872 for (a = 0; a < tbl->cnt; a++) {
3874 tval = tbl->ent[a].value;
3875 if (co.do_value_as_ip) {
3877 strncpy(tbuf, inet_ntoa(*(struct in_addr *)
3878 &tbl->ent[a].addr), 127);
3879 /* inet_ntoa expects network order */
3881 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
3882 inet_ntoa(*(struct in_addr *)&tval));
3884 printf("%s/%u %u\n",
3885 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
3886 tbl->ent[a].masklen, tval);