1 /* Code to take an ip6tables-style command line and do it. */
4 * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au
6 * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>:
7 * Paul 'Rusty' Russell <rusty@rustcorp.com.au>
8 * Marc Boucher <marc+nf@mbsi.ca>
9 * James Morris <jmorris@intercode.com.au>
10 * Harald Welte <laforge@gnumonks.org>
11 * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 #include <ip6tables.h>
39 #include <arpa/inet.h>
43 #include <sys/types.h>
44 #include <sys/socket.h>
53 #ifndef PROC_SYS_MODPROBE
54 #define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
57 #define FMT_NUMERIC 0x0001
58 #define FMT_NOCOUNTS 0x0002
59 #define FMT_KILOMEGAGIGA 0x0004
60 #define FMT_OPTIONS 0x0008
61 #define FMT_NOTABLE 0x0010
62 #define FMT_NOTARGET 0x0020
63 #define FMT_VIA 0x0040
64 #define FMT_NONEWLINE 0x0080
65 #define FMT_LINENUMBERS 0x0100
67 #define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \
68 | FMT_NUMERIC | FMT_NOTABLE)
69 #define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab))
72 #define CMD_NONE 0x0000U
73 #define CMD_INSERT 0x0001U
74 #define CMD_DELETE 0x0002U
75 #define CMD_DELETE_NUM 0x0004U
76 #define CMD_REPLACE 0x0008U
77 #define CMD_APPEND 0x0010U
78 #define CMD_LIST 0x0020U
79 #define CMD_FLUSH 0x0040U
80 #define CMD_ZERO 0x0080U
81 #define CMD_NEW_CHAIN 0x0100U
82 #define CMD_DELETE_CHAIN 0x0200U
83 #define CMD_SET_POLICY 0x0400U
84 #define CMD_CHECK 0x0800U
85 #define CMD_RENAME_CHAIN 0x1000U
86 #define NUMBER_OF_CMD 13
87 static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
90 #define OPTION_OFFSET 256
92 #define OPT_NONE 0x00000U
93 #define OPT_NUMERIC 0x00001U
94 #define OPT_SOURCE 0x00002U
95 #define OPT_DESTINATION 0x00004U
96 #define OPT_PROTOCOL 0x00008U
97 #define OPT_JUMP 0x00010U
98 #define OPT_VERBOSE 0x00020U
99 #define OPT_EXPANDED 0x00040U
100 #define OPT_VIANAMEIN 0x00080U
101 #define OPT_VIANAMEOUT 0x00100U
102 #define OPT_LINENUMBERS 0x00200U
103 #define OPT_COUNTERS 0x00400U
104 #define NUMBER_OF_OPT 11
105 static const char optflags[NUMBER_OF_OPT]
106 = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'};
108 static struct option original_opts[] = {
109 { "append", 1, 0, 'A' },
110 { "delete", 1, 0, 'D' },
111 { "insert", 1, 0, 'I' },
112 { "replace", 1, 0, 'R' },
113 { "list", 2, 0, 'L' },
114 { "flush", 2, 0, 'F' },
115 { "zero", 2, 0, 'Z' },
116 { "new-chain", 1, 0, 'N' },
117 { "delete-chain", 2, 0, 'X' },
118 { "rename-chain", 1, 0, 'E' },
119 { "policy", 1, 0, 'P' },
120 { "source", 1, 0, 's' },
121 { "destination", 1, 0, 'd' },
122 { "src", 1, 0, 's' }, /* synonym */
123 { "dst", 1, 0, 'd' }, /* synonym */
124 { "protocol", 1, 0, 'p' },
125 { "in-interface", 1, 0, 'i' },
126 { "jump", 1, 0, 'j' },
127 { "table", 1, 0, 't' },
128 { "match", 1, 0, 'm' },
129 { "numeric", 0, 0, 'n' },
130 { "out-interface", 1, 0, 'o' },
131 { "verbose", 0, 0, 'v' },
132 { "exact", 0, 0, 'x' },
133 { "version", 0, 0, 'V' },
134 { "help", 2, 0, 'h' },
135 { "line-numbers", 0, 0, '0' },
136 { "modprobe", 1, 0, 'M' },
137 { "set-counters", 1, 0, 'c' },
141 /* we need this for ip6tables-restore. ip6tables-restore.c sets line to the
142 * current line of the input file, in order to give a more precise error
143 * message. ip6tables itself doesn't need this, so it is initialized to the
144 * magic number of -1 */
147 static struct option *opts = original_opts;
148 static unsigned int global_option_offset = 0;
150 /* Table of legal combinations of commands and options. If any of the
151 * given commands make an option legal, that option is legal (applies to
152 * CMD_LIST and CMD_ZERO only).
159 static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
160 /* Well, it's better than "Re: Linux vs FreeBSD" */
162 /* -n -s -d -p -j -v -x -i -o --line */
163 /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
164 /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
165 /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x'},
166 /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
167 /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
168 /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' '},
169 /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x'},
170 /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x'},
171 /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
172 /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
173 /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x'},
174 /*CHECK*/ {'x','+','+','+','x',' ','x',' ',' ','x'},
175 /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x'}
178 static int inverse_for_options[NUMBER_OF_OPT] =
181 /* -s */ IP6T_INV_SRCIP,
182 /* -d */ IP6T_INV_DSTIP,
183 /* -p */ IP6T_INV_PROTO,
187 /* -i */ IP6T_INV_VIA_IN,
188 /* -o */ IP6T_INV_VIA_OUT,
192 const char *program_version;
193 const char *program_name;
196 /* Keeping track of external matches and targets: linked lists. */
197 struct ip6tables_match *ip6tables_matches = NULL;
198 struct ip6tables_target *ip6tables_targets = NULL;
200 /* Extra debugging from libiptc */
201 extern void dump_entries6(const ip6tc_handle_t handle);
203 /* A few hardcoded protocols for 'all' and in case the user has no
210 /* Primitive headers... */
211 /* defined in netinet/in.h */
214 #define IPPROTO_ESP 50
217 #define IPPROTO_AH 51
221 static const struct pprot chain_protos[] = {
222 { "tcp", IPPROTO_TCP },
223 { "udp", IPPROTO_UDP },
224 { "icmpv6", IPPROTO_ICMPV6 },
225 { "esp", IPPROTO_ESP },
226 { "ah", IPPROTO_AH },
231 proto_to_name(u_int8_t proto, int nolookup)
235 if (proto && !nolookup) {
236 struct protoent *pent = getprotobynumber(proto);
241 for (i = 0; i < sizeof(chain_protos)/sizeof(struct pprot); i++)
242 if (chain_protos[i].num == proto)
243 return chain_protos[i].name;
249 in6addrcpy(struct in6_addr *dst, struct in6_addr *src)
251 memcpy(dst, src, sizeof(struct in6_addr));
252 /* dst->s6_addr = src->s6_addr; */
255 static void free_opts(int reset_offset)
257 if (opts != original_opts) {
259 opts = original_opts;
261 global_option_offset = 0;
266 exit_error(enum exittype status, char *msg, ...)
271 fprintf(stderr, "%s v%s: ", program_name, program_version);
272 vfprintf(stderr, msg, args);
274 fprintf(stderr, "\n");
275 if (status == PARAMETER_PROBLEM)
276 exit_tryhelp(status);
277 if (status == VERSION_PROBLEM)
279 "Perhaps ip6tables or your kernel needs to be upgraded.\n");
280 /* On error paths, make sure that we don't leak memory */
286 exit_tryhelp(int status)
289 fprintf(stderr, "Error occurred at line: %d\n", line);
290 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
291 program_name, program_name );
297 exit_printhelp(struct ip6tables_rule_match *matches)
299 struct ip6tables_rule_match *matchp = NULL;
300 struct ip6tables_target *t = NULL;
303 "Usage: %s -[AD] chain rule-specification [options]\n"
304 " %s -[RI] chain rulenum rule-specification [options]\n"
305 " %s -D chain rulenum [options]\n"
306 " %s -[LFZ] [chain] [options]\n"
308 " %s -E old-chain-name new-chain-name\n"
309 " %s -P chain target [options]\n"
310 " %s -h (print this help information)\n\n",
311 program_name, program_version, program_name, program_name,
312 program_name, program_name, program_name, program_name,
313 program_name, program_name);
317 "Either long or short options are allowed.\n"
318 " --append -A chain Append to chain\n"
319 " --delete -D chain Delete matching rule from chain\n"
320 " --delete -D chain rulenum\n"
321 " Delete rule rulenum (1 = first) from chain\n"
322 " --insert -I chain [rulenum]\n"
323 " Insert in chain as rulenum (default 1=first)\n"
324 " --replace -R chain rulenum\n"
325 " Replace rule rulenum (1 = first) in chain\n"
326 " --list -L [chain] List the rules in a chain or all chains\n"
327 " --flush -F [chain] Delete all rules in chain or all chains\n"
328 " --zero -Z [chain] Zero counters in chain or all chains\n"
329 " --new -N chain Create a new user-defined chain\n"
331 " -X [chain] Delete a user-defined chain\n"
332 " --policy -P chain target\n"
333 " Change policy on chain to target\n"
335 " -E old-chain new-chain\n"
336 " Change chain name, (moving any references)\n"
339 " --proto -p [!] proto protocol: by number or name, eg. `tcp'\n"
340 " --source -s [!] address[/mask]\n"
341 " source specification\n"
342 " --destination -d [!] address[/mask]\n"
343 " destination specification\n"
344 " --in-interface -i [!] input name[+]\n"
345 " network interface name ([+] for wildcard)\n"
346 " --jump -j target\n"
347 " target for rule (may load target extension)\n"
348 " --match -m match\n"
349 " extended match (may load extension)\n"
350 " --numeric -n numeric output of addresses and ports\n"
351 " --out-interface -o [!] output name[+]\n"
352 " network interface name ([+] for wildcard)\n"
353 " --table -t table table to manipulate (default: `filter')\n"
354 " --verbose -v verbose mode\n"
355 " --line-numbers print line numbers when listing\n"
356 " --exact -x expand numbers (display exact values)\n"
357 /*"[!] --fragment -f match second or further fragments only\n"*/
358 " --modprobe=<command> try to insert modules using this command\n"
359 " --set-counters PKTS BYTES set the counter during insert/append\n"
360 "[!] --version -V print package version.\n");
362 /* Print out any special helps. A user might like to be able to add a --help
363 to the commandline, and see expected results. So we call help for all
364 specified matches & targets */
365 for (t = ip6tables_targets; t; t = t->next) {
371 for (matchp = matches; matchp; matchp = matchp->next) {
373 matchp->match->help();
379 generic_opt_check(int command, int options)
383 /* Check that commands are valid with options. Complicated by the
384 * fact that if an option is legal with *any* command given, it is
385 * legal overall (ie. -z and -l).
387 for (i = 0; i < NUMBER_OF_OPT; i++) {
388 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
390 for (j = 0; j < NUMBER_OF_CMD; j++) {
391 if (!(command & (1<<j)))
394 if (!(options & (1<<i))) {
395 if (commands_v_options[j][i] == '+')
396 exit_error(PARAMETER_PROBLEM,
397 "You need to supply the `-%c' "
398 "option for this command\n",
401 if (commands_v_options[j][i] != 'x')
408 exit_error(PARAMETER_PROBLEM,
409 "Illegal option `-%c' with this command\n",
418 for (ptr = optflags; option > 1; option >>= 1, ptr++);
427 for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
433 add_command(int *cmd, const int newcmd, const int othercmds, int invert)
436 exit_error(PARAMETER_PROBLEM, "unexpected ! flag");
437 if (*cmd & (~othercmds))
438 exit_error(PARAMETER_PROBLEM, "Can't use -%c with -%c\n",
439 cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
444 check_inverse(const char option[], int *invert, int *optind, int argc)
446 if (option && strcmp(option, "!") == 0) {
448 exit_error(PARAMETER_PROBLEM,
449 "Multiple `!' flags not allowed");
453 if (argc && *optind > argc)
454 exit_error(PARAMETER_PROBLEM,
455 "no argument following `!'");
464 fw_calloc(size_t count, size_t size)
468 if ((p = calloc(count, size)) == NULL) {
469 perror("ip6tables: calloc failed");
476 fw_malloc(size_t size)
480 if ((p = malloc(size)) == NULL) {
481 perror("ip6tables: malloc failed");
488 addr_to_numeric(const struct in6_addr *addrp)
490 /* 0000:0000:0000:0000:0000:000.000.000.000
491 * 0000:0000:0000:0000:0000:0000:0000:0000 */
492 static char buf[50+1];
493 return (char *)inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
496 static struct in6_addr *
497 numeric_to_addr(const char *num)
499 static struct in6_addr ap;
501 if ((err=inet_pton(AF_INET6, num, &ap)) == 1)
504 fprintf(stderr, "\nnumeric2addr: %d\n", err);
506 return (struct in6_addr *)NULL;
510 static struct in6_addr *
511 host_to_addr(const char *name, unsigned int *naddr)
513 struct addrinfo hints;
514 struct addrinfo *res;
515 static struct in6_addr *addr;
518 memset(&hints, 0, sizeof(hints));
519 hints.ai_flags=AI_CANONNAME;
520 hints.ai_family=AF_INET6;
521 hints.ai_socktype=SOCK_RAW;
522 hints.ai_protocol=41;
526 if ( (err=getaddrinfo(name, NULL, &hints, &res)) != 0 ){
528 fprintf(stderr,"Name2IP: %s\n",gai_strerror(err));
530 return (struct in6_addr *) NULL;
532 if (res->ai_family != AF_INET6 ||
533 res->ai_addrlen != sizeof(struct sockaddr_in6))
534 return (struct in6_addr *) NULL;
537 fprintf(stderr, "resolved: len=%d %s ", res->ai_addrlen,
538 addr_to_numeric(&(((struct sockaddr_in6 *)res->ai_addr)->sin6_addr)));
540 /* Get the first element of the address-chain */
541 addr = fw_calloc(1, sizeof(struct in6_addr));
542 in6addrcpy(addr, (struct in6_addr *)
543 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr);
549 return (struct in6_addr *) NULL;
553 addr_to_host(const struct in6_addr *addr)
555 struct sockaddr_in6 saddr;
557 static char hostname[NI_MAXHOST];
559 memset(&saddr, 0, sizeof(struct sockaddr_in6));
560 in6addrcpy(&(saddr.sin6_addr),(struct in6_addr *)addr);
561 saddr.sin6_family = AF_INET6;
563 if ( (err=getnameinfo((struct sockaddr *)&saddr,
564 sizeof(struct sockaddr_in6),
565 hostname, sizeof(hostname)-1,
568 fprintf(stderr,"IP2Name: %s\n",gai_strerror(err));
570 return (char *) NULL;
573 fprintf (stderr, "\naddr2host: %s\n", hostname);
579 return (char *) NULL;
583 mask_to_numeric(const struct in6_addr *addrp)
585 static char buf[50+2];
586 int l = ipv6_prefix_length(addrp);
589 strcat(buf, addr_to_numeric(addrp));
592 sprintf(buf, "/%d", l);
596 static struct in6_addr *
597 network_to_addr(const char *name)
600 /* TODO: not implemented yet, but the exception breaks the
601 * name resolvation */
602 return (struct in6_addr *)NULL;
606 addr_to_anyname(const struct in6_addr *addr)
610 if ((name = addr_to_host(addr)) != NULL)
613 return addr_to_numeric(addr);
617 * All functions starting with "parse" should succeed, otherwise
619 * Most routines return pointers to static data that may change
620 * between calls to the same or other routines with a few exceptions:
621 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
622 * return global static data.
625 static struct in6_addr *
626 parse_hostnetwork(const char *name, unsigned int *naddrs)
628 struct in6_addr *addrp, *addrptmp;
630 if ((addrptmp = numeric_to_addr(name)) != NULL ||
631 (addrptmp = network_to_addr(name)) != NULL) {
632 addrp = fw_malloc(sizeof(struct in6_addr));
633 in6addrcpy(addrp, addrptmp);
637 if ((addrp = host_to_addr(name, naddrs)) != NULL)
640 exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
643 static struct in6_addr *
644 parse_mask(char *mask)
646 static struct in6_addr maskaddr;
647 struct in6_addr *addrp;
651 /* no mask at all defaults to 128 bits */
652 memset(&maskaddr, 0xff, sizeof maskaddr);
655 if ((addrp = numeric_to_addr(mask)) != NULL)
657 if (string_to_number(mask, 0, 128, &bits) == -1)
658 exit_error(PARAMETER_PROBLEM,
659 "invalid mask `%s' specified", mask);
661 char *p = (char *)&maskaddr;
662 memset(p, 0xff, bits / 8);
663 memset(p + (bits / 8) + 1, 0, (128 - bits) / 8);
664 p[bits / 8] = 0xff << (8 - (bits & 7));
668 memset(&maskaddr, 0, sizeof maskaddr);
673 parse_hostnetworkmask(const char *name, struct in6_addr **addrpp,
674 struct in6_addr *maskp, unsigned int *naddrs)
676 struct in6_addr *addrp;
681 strncpy(buf, name, sizeof(buf) - 1);
682 buf[sizeof(buf) - 1] = '\0';
683 if ((p = strrchr(buf, '/')) != NULL) {
685 addrp = parse_mask(p + 1);
687 addrp = parse_mask(NULL);
688 in6addrcpy(maskp, addrp);
690 /* if a null mask is given, the name is ignored, like in "any/0" */
691 if (!memcmp(maskp, &in6addr_any, sizeof(in6addr_any)))
694 addrp = *addrpp = parse_hostnetwork(buf, naddrs);
696 for (i = 0, j = 0; i < n; i++) {
698 for (k = 0; k < 4; k++)
699 addrp[j].in6_u.u6_addr32[k] &= maskp->in6_u.u6_addr32[k];
701 for (k = 0; k < j - 1; k++) {
702 if (IN6_ARE_ADDR_EQUAL(&addrp[k], &addrp[j - 1])) {
711 struct ip6tables_match *
712 find_match(const char *name, enum ip6t_tryload tryload, struct ip6tables_rule_match **matches)
714 struct ip6tables_match *ptr;
717 /* This is ugly as hell. Nonetheless, there is no way of changing
718 * this without hurting backwards compatibility */
719 if ( (strcmp(name,"icmpv6") == 0) ||
720 (strcmp(name,"ipv6-icmp") == 0) ||
721 (strcmp(name,"icmp6") == 0) ) icmphack = 1;
724 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
725 if (strcmp(name, ptr->name) == 0)
729 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
730 if (strcmp("icmp6", ptr->name) == 0)
735 #ifndef NO_SHARED_LIBS
736 if (!ptr && tryload != DONT_LOAD) {
737 char path[strlen(lib_dir) + sizeof("/libip6t_.so")
740 sprintf(path, "%s/libip6t_%s.so", lib_dir, name);
742 sprintf(path, "%s/libip6t_%s.so", lib_dir, "icmpv6");
743 if (dlopen(path, RTLD_NOW)) {
744 /* Found library. If it didn't register itself,
745 maybe they specified target as match. */
746 ptr = find_match(name, DONT_LOAD, NULL);
749 exit_error(PARAMETER_PROBLEM,
750 "Couldn't load match `%s'\n",
752 } else if (tryload == LOAD_MUST_SUCCEED)
753 exit_error(PARAMETER_PROBLEM,
754 "Couldn't load match `%s':%s\n",
758 if (ptr && !ptr->loaded) {
759 if (tryload != DONT_LOAD)
764 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
765 exit_error(PARAMETER_PROBLEM,
766 "Couldn't find match `%s'\n", name);
770 if (ptr && matches) {
771 struct ip6tables_rule_match **i;
772 struct ip6tables_rule_match *newentry;
774 newentry = fw_malloc(sizeof(struct ip6tables_rule_match));
776 for (i = matches; *i; i = &(*i)->next);
777 newentry->match = ptr;
778 newentry->next = NULL;
785 /* Christophe Burki wants `-p 6' to imply `-m tcp'. */
786 static struct ip6tables_match *
787 find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup, struct ip6tables_rule_match **matches)
791 if (string_to_number(pname, 0, 255, &proto) != -1) {
792 char *protoname = proto_to_name(proto, nolookup);
795 return find_match(protoname, tryload, matches);
797 return find_match(pname, tryload, matches);
803 parse_protocol(const char *s)
807 if (string_to_number(s, 0, 255, &proto) == -1) {
808 struct protoent *pent;
810 if ((pent = getprotobyname(s)))
811 proto = pent->p_proto;
815 i < sizeof(chain_protos)/sizeof(struct pprot);
817 if (strcmp(s, chain_protos[i].name) == 0) {
818 proto = chain_protos[i].num;
822 if (i == sizeof(chain_protos)/sizeof(struct pprot))
823 exit_error(PARAMETER_PROBLEM,
824 "unknown protocol `%s' specified",
829 return (u_int16_t)proto;
832 void parse_interface(const char *arg, char *vianame, unsigned char *mask)
834 int vialen = strlen(arg);
837 memset(mask, 0, IFNAMSIZ);
838 memset(vianame, 0, IFNAMSIZ);
840 if (vialen + 1 > IFNAMSIZ)
841 exit_error(PARAMETER_PROBLEM,
842 "interface name `%s' must be shorter than IFNAMSIZ"
843 " (%i)", arg, IFNAMSIZ-1);
845 strcpy(vianame, arg);
846 if ((vialen == 0) || (vialen == 1 && vianame[0] == '+'))
847 memset(mask, 0, IFNAMSIZ);
848 else if (vianame[vialen - 1] == '+') {
849 memset(mask, 0xFF, vialen - 1);
850 memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1);
851 /* Don't remove `+' here! -HW */
853 /* Include nul-terminator in match */
854 memset(mask, 0xFF, vialen + 1);
855 memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1);
856 for (i = 0; vianame[i]; i++) {
857 if (!isalnum(vianame[i])
859 && vianame[i] != '.') {
860 printf("Warning: wierd character in interface"
861 " `%s' (No aliases, :, ! or *).\n",
871 parse_rulenumber(const char *rule)
873 unsigned int rulenum;
875 if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1)
876 exit_error(PARAMETER_PROBLEM,
877 "Invalid rule number `%s'", rule);
883 parse_target(const char *targetname)
887 if (strlen(targetname) < 1)
888 exit_error(PARAMETER_PROBLEM,
889 "Invalid target name (too short)");
891 if (strlen(targetname)+1 > sizeof(ip6t_chainlabel))
892 exit_error(PARAMETER_PROBLEM,
893 "Invalid target name `%s' (%u chars max)",
894 targetname, (unsigned int)sizeof(ip6t_chainlabel)-1);
896 for (ptr = targetname; *ptr; ptr++)
898 exit_error(PARAMETER_PROBLEM,
899 "Invalid target name `%s'", targetname);
904 string_to_number_ll(const char *s, unsigned long long min, unsigned long long max,
905 unsigned long long *ret)
907 unsigned long long number;
910 /* Handle hex, octal, etc. */
912 number = strtoull(s, &end, 0);
913 if (*end == '\0' && end != s) {
914 /* we parsed a number, let's see if we want this */
915 if (errno != ERANGE && min <= number && (!max || number <= max)) {
924 string_to_number_l(const char *s, unsigned long min, unsigned long max,
928 unsigned long long number;
930 result = string_to_number_ll(s, min, max, &number);
931 *ret = (unsigned long)number;
936 int string_to_number(const char *s, unsigned int min, unsigned int max,
940 unsigned long number;
942 result = string_to_number_l(s, min, max, &number);
943 *ret = (unsigned int)number;
949 set_option(unsigned int *options, unsigned int option, u_int8_t *invflg,
952 if (*options & option)
953 exit_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
959 for (i = 0; 1 << i != option; i++);
961 if (!inverse_for_options[i])
962 exit_error(PARAMETER_PROBLEM,
963 "cannot have ! before -%c",
965 *invflg |= inverse_for_options[i];
969 struct ip6tables_target *
970 find_target(const char *name, enum ip6t_tryload tryload)
972 struct ip6tables_target *ptr;
974 /* Standard target? */
975 if (strcmp(name, "") == 0
976 || strcmp(name, IP6TC_LABEL_ACCEPT) == 0
977 || strcmp(name, IP6TC_LABEL_DROP) == 0
978 || strcmp(name, IP6TC_LABEL_QUEUE) == 0
979 || strcmp(name, IP6TC_LABEL_RETURN) == 0)
982 for (ptr = ip6tables_targets; ptr; ptr = ptr->next) {
983 if (strcmp(name, ptr->name) == 0)
987 #ifndef NO_SHARED_LIBS
988 if (!ptr && tryload != DONT_LOAD) {
989 char path[strlen(lib_dir) + sizeof("/libip6t_.so")
991 sprintf(path, "%s/libip6t_%s.so", lib_dir, name);
992 if (dlopen(path, RTLD_NOW)) {
993 /* Found library. If it didn't register itself,
994 maybe they specified match as a target. */
995 ptr = find_target(name, DONT_LOAD);
997 exit_error(PARAMETER_PROBLEM,
998 "Couldn't load target `%s'\n",
1000 } else if (tryload == LOAD_MUST_SUCCEED)
1001 exit_error(PARAMETER_PROBLEM,
1002 "Couldn't load target `%s':%s\n",
1006 if (ptr && !ptr->loaded) {
1007 if (tryload != DONT_LOAD)
1012 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
1013 exit_error(PARAMETER_PROBLEM,
1014 "Couldn't find target `%s'\n", name);
1024 static struct option *
1025 merge_options(struct option *oldopts, const struct option *newopts,
1026 unsigned int *option_offset)
1028 unsigned int num_old, num_new, i;
1029 struct option *merge;
1031 /* Release previous options merged if any */
1034 for (num_old = 0; oldopts[num_old].name; num_old++);
1035 for (num_new = 0; newopts[num_new].name; num_new++);
1037 global_option_offset += OPTION_OFFSET;
1038 *option_offset = global_option_offset;
1040 merge = malloc(sizeof(struct option) * (num_new + num_old + 1));
1041 memcpy(merge, oldopts, num_old * sizeof(struct option));
1042 for (i = 0; i < num_new; i++) {
1043 merge[num_old + i] = newopts[i];
1044 merge[num_old + i].val += *option_offset;
1046 memset(merge + num_old + num_new, 0, sizeof(struct option));
1052 register_match6(struct ip6tables_match *me)
1054 struct ip6tables_match **i;
1056 if (strcmp(me->version, program_version) != 0) {
1057 fprintf(stderr, "%s: match `%s' v%s (I'm v%s).\n",
1058 program_name, me->name, me->version, program_version);
1062 if (find_match(me->name, DONT_LOAD, NULL)) {
1063 fprintf(stderr, "%s: match `%s' already registered.\n",
1064 program_name, me->name);
1068 if (me->size != IP6T_ALIGN(me->size)) {
1069 fprintf(stderr, "%s: match `%s' has invalid size %u.\n",
1070 program_name, me->name, (unsigned int)me->size);
1074 /* Append to list. */
1075 for (i = &ip6tables_matches; *i; i = &(*i)->next);
1084 register_target6(struct ip6tables_target *me)
1086 if (strcmp(me->version, program_version) != 0) {
1087 fprintf(stderr, "%s: target `%s' v%s (I'm v%s).\n",
1088 program_name, me->name, me->version, program_version);
1092 if (find_target(me->name, DONT_LOAD)) {
1093 fprintf(stderr, "%s: target `%s' already registered.\n",
1094 program_name, me->name);
1098 if (me->size != IP6T_ALIGN(me->size)) {
1099 fprintf(stderr, "%s: target `%s' has invalid size %u.\n",
1100 program_name, me->name, (unsigned int)me->size);
1104 /* Prepend to list. */
1105 me->next = ip6tables_targets;
1106 ip6tables_targets = me;
1112 print_num(u_int64_t number, unsigned int format)
1114 if (format & FMT_KILOMEGAGIGA) {
1115 if (number > 99999) {
1116 number = (number + 500) / 1000;
1117 if (number > 9999) {
1118 number = (number + 500) / 1000;
1119 if (number > 9999) {
1120 number = (number + 500) / 1000;
1121 if (number > 9999) {
1122 number = (number + 500) / 1000;
1123 printf(FMT("%4lluT ","%lluT "), (unsigned long long)number);
1125 else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number);
1127 else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number);
1129 printf(FMT("%4lluK ","%lluK "), (unsigned long long)number);
1131 printf(FMT("%5llu ","%llu "), (unsigned long long)number);
1133 printf(FMT("%8llu ","%llu "), (unsigned long long)number);
1138 print_header(unsigned int format, const char *chain, ip6tc_handle_t *handle)
1140 struct ip6t_counters counters;
1141 const char *pol = ip6tc_get_policy(chain, &counters, handle);
1142 printf("Chain %s", chain);
1144 printf(" (policy %s", pol);
1145 if (!(format & FMT_NOCOUNTS)) {
1147 print_num(counters.pcnt, (format|FMT_NOTABLE));
1148 fputs("packets, ", stdout);
1149 print_num(counters.bcnt, (format|FMT_NOTABLE));
1150 fputs("bytes", stdout);
1155 if (!ip6tc_get_references(&refs, chain, handle))
1156 printf(" (ERROR obtaining refs)\n");
1158 printf(" (%u references)\n", refs);
1161 if (format & FMT_LINENUMBERS)
1162 printf(FMT("%-4s ", "%s "), "num");
1163 if (!(format & FMT_NOCOUNTS)) {
1164 if (format & FMT_KILOMEGAGIGA) {
1165 printf(FMT("%5s ","%s "), "pkts");
1166 printf(FMT("%5s ","%s "), "bytes");
1168 printf(FMT("%8s ","%s "), "pkts");
1169 printf(FMT("%10s ","%s "), "bytes");
1172 if (!(format & FMT_NOTARGET))
1173 printf(FMT("%-9s ","%s "), "target");
1174 fputs(" prot ", stdout);
1175 if (format & FMT_OPTIONS)
1176 fputs("opt", stdout);
1177 if (format & FMT_VIA) {
1178 printf(FMT(" %-6s ","%s "), "in");
1179 printf(FMT("%-6s ","%s "), "out");
1181 printf(FMT(" %-19s ","%s "), "source");
1182 printf(FMT(" %-19s "," %s "), "destination");
1188 print_match(const struct ip6t_entry_match *m,
1189 const struct ip6t_ip6 *ip,
1192 struct ip6tables_match *match = find_match(m->u.user.name, TRY_LOAD, NULL);
1196 match->print(ip, m, numeric);
1198 printf("%s ", match->name);
1200 if (m->u.user.name[0])
1201 printf("UNKNOWN match `%s' ", m->u.user.name);
1203 /* Don't stop iterating. */
1207 /* e is called `fw' here for hysterical raisins */
1209 print_firewall(const struct ip6t_entry *fw,
1210 const char *targname,
1212 unsigned int format,
1213 const ip6tc_handle_t handle)
1215 struct ip6tables_target *target = NULL;
1216 const struct ip6t_entry_target *t;
1220 if (!ip6tc_is_chain(targname, handle))
1221 target = find_target(targname, TRY_LOAD);
1223 target = find_target(IP6T_STANDARD_TARGET, LOAD_MUST_SUCCEED);
1225 t = ip6t_get_target((struct ip6t_entry *)fw);
1226 flags = fw->ipv6.flags;
1228 if (format & FMT_LINENUMBERS)
1229 printf(FMT("%-4u ", "%u "), num+1);
1231 if (!(format & FMT_NOCOUNTS)) {
1232 print_num(fw->counters.pcnt, format);
1233 print_num(fw->counters.bcnt, format);
1236 if (!(format & FMT_NOTARGET))
1237 printf(FMT("%-9s ", "%s "), targname);
1239 fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout);
1241 char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC);
1243 printf(FMT("%-5s", "%s "), pname);
1245 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto);
1248 if (format & FMT_OPTIONS) {
1249 if (format & FMT_NOTABLE)
1250 fputs("opt ", stdout);
1251 fputc(' ', stdout); /* Invert flag of FRAG */
1252 fputc(' ', stdout); /* -f */
1256 if (format & FMT_VIA) {
1257 char iface[IFNAMSIZ+2];
1259 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) {
1263 else iface[0] = '\0';
1265 if (fw->ipv6.iniface[0] != '\0') {
1266 strcat(iface, fw->ipv6.iniface);
1268 else if (format & FMT_NUMERIC) strcat(iface, "*");
1269 else strcat(iface, "any");
1270 printf(FMT(" %-6s ","in %s "), iface);
1272 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) {
1276 else iface[0] = '\0';
1278 if (fw->ipv6.outiface[0] != '\0') {
1279 strcat(iface, fw->ipv6.outiface);
1281 else if (format & FMT_NUMERIC) strcat(iface, "*");
1282 else strcat(iface, "any");
1283 printf(FMT("%-6s ","out %s "), iface);
1286 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout);
1287 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any)
1288 && !(format & FMT_NUMERIC))
1289 printf(FMT("%-19s ","%s "), "anywhere");
1291 if (format & FMT_NUMERIC)
1292 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.src)));
1294 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.src)));
1295 strcat(buf, mask_to_numeric(&(fw->ipv6.smsk)));
1296 printf(FMT("%-19s ","%s "), buf);
1299 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout);
1300 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any)
1301 && !(format & FMT_NUMERIC))
1302 printf(FMT("%-19s","-> %s"), "anywhere");
1304 if (format & FMT_NUMERIC)
1305 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.dst)));
1307 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.dst)));
1308 strcat(buf, mask_to_numeric(&(fw->ipv6.dmsk)));
1309 printf(FMT("%-19s","-> %s"), buf);
1312 if (format & FMT_NOTABLE)
1315 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC);
1319 /* Print the target information. */
1320 target->print(&fw->ipv6, t, format & FMT_NUMERIC);
1321 } else if (t->u.target_size != sizeof(*t))
1322 printf("[%u bytes of unknown target data] ",
1323 (unsigned int)(t->u.target_size - sizeof(*t)));
1325 if (!(format & FMT_NONEWLINE))
1326 fputc('\n', stdout);
1330 print_firewall_line(const struct ip6t_entry *fw,
1331 const ip6tc_handle_t h)
1333 struct ip6t_entry_target *t;
1335 t = ip6t_get_target((struct ip6t_entry *)fw);
1336 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
1340 append_entry(const ip6t_chainlabel chain,
1341 struct ip6t_entry *fw,
1342 unsigned int nsaddrs,
1343 const struct in6_addr saddrs[],
1344 unsigned int ndaddrs,
1345 const struct in6_addr daddrs[],
1347 ip6tc_handle_t *handle)
1352 for (i = 0; i < nsaddrs; i++) {
1353 fw->ipv6.src = saddrs[i];
1354 for (j = 0; j < ndaddrs; j++) {
1355 fw->ipv6.dst = daddrs[j];
1357 print_firewall_line(fw, *handle);
1358 ret &= ip6tc_append_entry(chain, fw, handle);
1366 replace_entry(const ip6t_chainlabel chain,
1367 struct ip6t_entry *fw,
1368 unsigned int rulenum,
1369 const struct in6_addr *saddr,
1370 const struct in6_addr *daddr,
1372 ip6tc_handle_t *handle)
1374 fw->ipv6.src = *saddr;
1375 fw->ipv6.dst = *daddr;
1378 print_firewall_line(fw, *handle);
1379 return ip6tc_replace_entry(chain, fw, rulenum, handle);
1383 insert_entry(const ip6t_chainlabel chain,
1384 struct ip6t_entry *fw,
1385 unsigned int rulenum,
1386 unsigned int nsaddrs,
1387 const struct in6_addr saddrs[],
1388 unsigned int ndaddrs,
1389 const struct in6_addr daddrs[],
1391 ip6tc_handle_t *handle)
1396 for (i = 0; i < nsaddrs; i++) {
1397 fw->ipv6.src = saddrs[i];
1398 for (j = 0; j < ndaddrs; j++) {
1399 fw->ipv6.dst = daddrs[j];
1401 print_firewall_line(fw, *handle);
1402 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
1409 static unsigned char *
1410 make_delete_mask(struct ip6t_entry *fw, struct ip6tables_rule_match *matches)
1412 /* Establish mask for comparison */
1414 struct ip6tables_rule_match *matchp;
1415 unsigned char *mask, *mptr;
1417 size = sizeof(struct ip6t_entry);
1418 for (matchp = matches; matchp; matchp = matchp->next)
1419 size += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
1421 mask = fw_calloc(1, size
1422 + IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1423 + ip6tables_targets->size);
1425 memset(mask, 0xFF, sizeof(struct ip6t_entry));
1426 mptr = mask + sizeof(struct ip6t_entry);
1428 for (matchp = matches; matchp; matchp = matchp->next) {
1430 IP6T_ALIGN(sizeof(struct ip6t_entry_match))
1431 + matchp->match->userspacesize);
1432 mptr += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size;
1436 IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1437 + ip6tables_targets->userspacesize);
1443 delete_entry(const ip6t_chainlabel chain,
1444 struct ip6t_entry *fw,
1445 unsigned int nsaddrs,
1446 const struct in6_addr saddrs[],
1447 unsigned int ndaddrs,
1448 const struct in6_addr daddrs[],
1450 ip6tc_handle_t *handle,
1451 struct ip6tables_rule_match *matches)
1455 unsigned char *mask;
1457 mask = make_delete_mask(fw, matches);
1458 for (i = 0; i < nsaddrs; i++) {
1459 fw->ipv6.src = saddrs[i];
1460 for (j = 0; j < ndaddrs; j++) {
1461 fw->ipv6.dst = daddrs[j];
1463 print_firewall_line(fw, *handle);
1464 ret &= ip6tc_delete_entry(chain, fw, mask, handle);
1473 for_each_chain(int (*fn)(const ip6t_chainlabel, int, ip6tc_handle_t *),
1474 int verbose, int builtinstoo, ip6tc_handle_t *handle)
1479 unsigned int i, chaincount = 0;
1481 chain = ip6tc_first_chain(handle);
1484 chain = ip6tc_next_chain(handle);
1487 chains = fw_malloc(sizeof(ip6t_chainlabel) * chaincount);
1489 chain = ip6tc_first_chain(handle);
1491 strcpy(chains + i*sizeof(ip6t_chainlabel), chain);
1493 chain = ip6tc_next_chain(handle);
1496 for (i = 0; i < chaincount; i++) {
1498 && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel),
1501 ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle);
1509 flush_entries(const ip6t_chainlabel chain, int verbose,
1510 ip6tc_handle_t *handle)
1513 return for_each_chain(flush_entries, verbose, 1, handle);
1516 fprintf(stdout, "Flushing chain `%s'\n", chain);
1517 return ip6tc_flush_entries(chain, handle);
1521 zero_entries(const ip6t_chainlabel chain, int verbose,
1522 ip6tc_handle_t *handle)
1525 return for_each_chain(zero_entries, verbose, 1, handle);
1528 fprintf(stdout, "Zeroing chain `%s'\n", chain);
1529 return ip6tc_zero_entries(chain, handle);
1533 delete_chain(const ip6t_chainlabel chain, int verbose,
1534 ip6tc_handle_t *handle)
1537 return for_each_chain(delete_chain, verbose, 0, handle);
1540 fprintf(stdout, "Deleting chain `%s'\n", chain);
1541 return ip6tc_delete_chain(chain, handle);
1545 list_entries(const ip6t_chainlabel chain, int verbose, int numeric,
1546 int expanded, int linenumbers, ip6tc_handle_t *handle)
1549 unsigned int format;
1552 format = FMT_OPTIONS;
1554 format |= FMT_NOCOUNTS;
1559 format |= FMT_NUMERIC;
1562 format |= FMT_KILOMEGAGIGA;
1565 format |= FMT_LINENUMBERS;
1567 for (this = ip6tc_first_chain(handle);
1569 this = ip6tc_next_chain(handle)) {
1570 const struct ip6t_entry *i;
1573 if (chain && strcmp(chain, this) != 0)
1576 if (found) printf("\n");
1578 print_header(format, this, handle);
1579 i = ip6tc_first_rule(this, handle);
1584 ip6tc_get_target(i, handle),
1588 i = ip6tc_next_rule(i, handle);
1597 static char *get_modprobe(void)
1602 #define PROCFILE_BUFSIZ 1024
1603 procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
1607 ret = malloc(PROCFILE_BUFSIZ);
1609 memset(ret, 0, PROCFILE_BUFSIZ);
1610 switch (read(procfile, ret, PROCFILE_BUFSIZ)) {
1612 case PROCFILE_BUFSIZ: goto fail; /* Partial read. Wierd */
1614 if (ret[strlen(ret)-1]=='\n')
1615 ret[strlen(ret)-1]=0;
1625 int ip6tables_insmod(const char *modname, const char *modprobe)
1631 /* If they don't explicitly set it, read out of kernel */
1633 buf = get_modprobe();
1641 argv[0] = (char *)modprobe;
1642 argv[1] = (char *)modname;
1644 execv(argv[0], argv);
1646 /* not usually reached */
1651 default: /* parent */
1656 if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
1661 static struct ip6t_entry *
1662 generate_entry(const struct ip6t_entry *fw,
1663 struct ip6tables_rule_match *matches,
1664 struct ip6t_entry_target *target)
1667 struct ip6tables_rule_match *matchp;
1668 struct ip6t_entry *e;
1670 size = sizeof(struct ip6t_entry);
1671 for (matchp = matches; matchp; matchp = matchp->next)
1672 size += matchp->match->m->u.match_size;
1674 e = fw_malloc(size + target->u.target_size);
1676 e->target_offset = size;
1677 e->next_offset = size + target->u.target_size;
1680 for (matchp = matches; matchp; matchp = matchp->next) {
1681 memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size);
1682 size += matchp->match->m->u.match_size;
1684 memcpy(e->elems + size, target, target->u.target_size);
1689 void clear_rule_matches(struct ip6tables_rule_match **matches)
1691 struct ip6tables_rule_match *matchp, *tmp;
1693 for (matchp = *matches; matchp;) {
1695 if (matchp->match->m)
1696 free(matchp->match->m);
1704 int do_command6(int argc, char *argv[], char **table, ip6tc_handle_t *handle)
1706 struct ip6t_entry fw, *e = NULL;
1708 unsigned int nsaddrs = 0, ndaddrs = 0;
1709 struct in6_addr *saddrs = NULL, *daddrs = NULL;
1712 const char *chain = NULL;
1713 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
1714 const char *policy = NULL, *newname = NULL;
1715 unsigned int rulenum = 0, options = 0, command = 0;
1716 const char *pcnt = NULL, *bcnt = NULL;
1718 struct ip6tables_match *m;
1719 struct ip6tables_rule_match *matches = NULL;
1720 struct ip6tables_rule_match *matchp;
1721 struct ip6tables_target *target = NULL;
1722 struct ip6tables_target *t;
1723 const char *jumpto = "";
1724 char *protocol = NULL;
1725 const char *modprobe = NULL;
1727 char icmp6p[] = "icmpv6";
1729 memset(&fw, 0, sizeof(fw));
1731 /* re-set optind to 0 in case do_command gets called
1735 /* clear mflags in case do_command gets called a second time
1736 * (we clear the global list of all matches for security)*/
1737 for (m = ip6tables_matches; m; m = m->next)
1740 for (t = ip6tables_targets; t; t = t->next) {
1745 /* Suppress error messages: we may add new options if we
1746 demand-load a protocol. */
1749 while ((c = getopt_long(argc, argv,
1750 "-A:D:R:I:L::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:",
1751 opts, NULL)) != -1) {
1757 add_command(&command, CMD_APPEND, CMD_NONE,
1763 add_command(&command, CMD_DELETE, CMD_NONE,
1766 if (optind < argc && argv[optind][0] != '-'
1767 && argv[optind][0] != '!') {
1768 rulenum = parse_rulenumber(argv[optind++]);
1769 command = CMD_DELETE_NUM;
1774 add_command(&command, CMD_REPLACE, CMD_NONE,
1777 if (optind < argc && argv[optind][0] != '-'
1778 && argv[optind][0] != '!')
1779 rulenum = parse_rulenumber(argv[optind++]);
1781 exit_error(PARAMETER_PROBLEM,
1782 "-%c requires a rule number",
1783 cmd2char(CMD_REPLACE));
1787 add_command(&command, CMD_INSERT, CMD_NONE,
1790 if (optind < argc && argv[optind][0] != '-'
1791 && argv[optind][0] != '!')
1792 rulenum = parse_rulenumber(argv[optind++]);
1797 add_command(&command, CMD_LIST, CMD_ZERO,
1799 if (optarg) chain = optarg;
1800 else if (optind < argc && argv[optind][0] != '-'
1801 && argv[optind][0] != '!')
1802 chain = argv[optind++];
1806 add_command(&command, CMD_FLUSH, CMD_NONE,
1808 if (optarg) chain = optarg;
1809 else if (optind < argc && argv[optind][0] != '-'
1810 && argv[optind][0] != '!')
1811 chain = argv[optind++];
1815 add_command(&command, CMD_ZERO, CMD_LIST,
1817 if (optarg) chain = optarg;
1818 else if (optind < argc && argv[optind][0] != '-'
1819 && argv[optind][0] != '!')
1820 chain = argv[optind++];
1824 if (optarg && (*optarg == '-' || *optarg == '!'))
1825 exit_error(PARAMETER_PROBLEM,
1826 "chain name not allowed to start "
1827 "with `%c'\n", *optarg);
1828 if (find_target(optarg, TRY_LOAD))
1829 exit_error(PARAMETER_PROBLEM,
1830 "chain name may not clash "
1831 "with target name\n");
1832 add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
1838 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
1840 if (optarg) chain = optarg;
1841 else if (optind < argc && argv[optind][0] != '-'
1842 && argv[optind][0] != '!')
1843 chain = argv[optind++];
1847 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
1850 if (optind < argc && argv[optind][0] != '-'
1851 && argv[optind][0] != '!')
1852 newname = argv[optind++];
1854 exit_error(PARAMETER_PROBLEM,
1855 "-%c requires old-chain-name and "
1857 cmd2char(CMD_RENAME_CHAIN));
1861 add_command(&command, CMD_SET_POLICY, CMD_NONE,
1864 if (optind < argc && argv[optind][0] != '-'
1865 && argv[optind][0] != '!')
1866 policy = argv[optind++];
1868 exit_error(PARAMETER_PROBLEM,
1869 "-%c requires a chain and a policy",
1870 cmd2char(CMD_SET_POLICY));
1875 optarg = argv[optind];
1877 /* ip6tables -p icmp -h */
1878 if (!matches && protocol)
1879 find_match(protocol, TRY_LOAD, &matches);
1881 exit_printhelp(matches);
1887 check_inverse(optarg, &invert, &optind, argc);
1888 set_option(&options, OPT_PROTOCOL, &fw.ipv6.invflags,
1891 /* Canonicalize into lower case */
1892 for (protocol = argv[optind-1]; *protocol; protocol++)
1893 *protocol = tolower(*protocol);
1895 protocol = argv[optind-1];
1896 if ( strcmp(protocol,"ipv6-icmp") == 0)
1898 fw.ipv6.proto = parse_protocol(protocol);
1899 fw.ipv6.flags |= IP6T_F_PROTO;
1901 if (fw.ipv6.proto == 0
1902 && (fw.ipv6.invflags & IP6T_INV_PROTO))
1903 exit_error(PARAMETER_PROBLEM,
1904 "rule would never match protocol");
1908 check_inverse(optarg, &invert, &optind, argc);
1909 set_option(&options, OPT_SOURCE, &fw.ipv6.invflags,
1911 shostnetworkmask = argv[optind-1];
1915 check_inverse(optarg, &invert, &optind, argc);
1916 set_option(&options, OPT_DESTINATION, &fw.ipv6.invflags,
1918 dhostnetworkmask = argv[optind-1];
1922 set_option(&options, OPT_JUMP, &fw.ipv6.invflags,
1924 jumpto = parse_target(optarg);
1925 /* TRY_LOAD (may be chain name) */
1926 target = find_target(jumpto, TRY_LOAD);
1931 size = IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1934 target->t = fw_calloc(1, size);
1935 target->t->u.target_size = size;
1936 strcpy(target->t->u.user.name, jumpto);
1937 if (target->init != NULL)
1938 target->init(target->t, &fw.nfcache);
1939 opts = merge_options(opts, target->extra_opts, &target->option_offset);
1945 check_inverse(optarg, &invert, &optind, argc);
1946 set_option(&options, OPT_VIANAMEIN, &fw.ipv6.invflags,
1948 parse_interface(argv[optind-1],
1950 fw.ipv6.iniface_mask);
1954 check_inverse(optarg, &invert, &optind, argc);
1955 set_option(&options, OPT_VIANAMEOUT, &fw.ipv6.invflags,
1957 parse_interface(argv[optind-1],
1959 fw.ipv6.outiface_mask);
1964 set_option(&options, OPT_VERBOSE,
1965 &fw.ipv6.invflags, invert);
1973 exit_error(PARAMETER_PROBLEM,
1974 "unexpected ! flag before --match");
1976 m = find_match(optarg, LOAD_MUST_SUCCEED, &matches);
1977 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
1979 m->m = fw_calloc(1, size);
1980 m->m->u.match_size = size;
1981 strcpy(m->m->u.user.name, m->name);
1982 if (m->init != NULL)
1983 m->init(m->m, &fw.nfcache);
1984 opts = merge_options(opts, m->extra_opts, &m->option_offset);
1989 set_option(&options, OPT_NUMERIC, &fw.ipv6.invflags,
1995 exit_error(PARAMETER_PROBLEM,
1996 "unexpected ! flag before --table");
1997 *table = argv[optind-1];
2001 set_option(&options, OPT_EXPANDED, &fw.ipv6.invflags,
2007 printf("Not %s ;-)\n", program_version);
2010 program_name, program_version);
2014 set_option(&options, OPT_LINENUMBERS, &fw.ipv6.invflags,
2024 set_option(&options, OPT_COUNTERS, &fw.ipv6.invflags,
2027 if (optind < argc && argv[optind][0] != '-'
2028 && argv[optind][0] != '!')
2029 bcnt = argv[optind++];
2031 exit_error(PARAMETER_PROBLEM,
2032 "-%c requires packet and byte counter",
2033 opt2char(OPT_COUNTERS));
2035 if (sscanf(pcnt, "%llu", (unsigned long long *)&fw.counters.pcnt) != 1)
2036 exit_error(PARAMETER_PROBLEM,
2037 "-%c packet counter not numeric",
2038 opt2char(OPT_COUNTERS));
2040 if (sscanf(bcnt, "%llu", (unsigned long long *)&fw.counters.bcnt) != 1)
2041 exit_error(PARAMETER_PROBLEM,
2042 "-%c byte counter not numeric",
2043 opt2char(OPT_COUNTERS));
2048 case 1: /* non option */
2049 if (optarg[0] == '!' && optarg[1] == '\0') {
2051 exit_error(PARAMETER_PROBLEM,
2052 "multiple consecutive ! not"
2058 printf("Bad argument `%s'\n", optarg);
2062 /* FIXME: This scheme doesn't allow two of the same
2065 || !(target->parse(c - target->option_offset,
2068 &fw, &target->t))) {
2069 for (matchp = matches; matchp; matchp = matchp->next) {
2070 if (matchp->match->parse(c - matchp->match->option_offset,
2072 &matchp->match->mflags,
2078 m = matchp ? matchp->match : NULL;
2080 /* If you listen carefully, you can
2081 actually hear this code suck. */
2083 /* some explanations (after four different bugs
2084 * in 3 different releases): If we encountere a
2085 * parameter, that has not been parsed yet,
2086 * it's not an option of an explicitly loaded
2087 * match or a target. However, we support
2088 * implicit loading of the protocol match
2089 * extension. '-p tcp' means 'l4 proto 6' and
2090 * at the same time 'load tcp protocol match on
2091 * demand if we specify --dport'.
2093 * To make this work, we need to make sure:
2094 * - the parameter has not been parsed by
2096 * - a protocol has been specified
2097 * - the protocol extension has not been
2098 * loaded yet, or is loaded and unused
2099 * [think of ip6tables-restore!]
2100 * - the protocol extension can be successively
2105 && (!find_proto(protocol, DONT_LOAD,
2106 options&OPT_NUMERIC, NULL)
2107 || (find_proto(protocol, DONT_LOAD,
2108 options&OPT_NUMERIC, NULL)
2109 && (proto_used == 0))
2111 && (m = find_proto(protocol, TRY_LOAD,
2112 options&OPT_NUMERIC, &matches))) {
2113 /* Try loading protocol */
2118 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
2121 m->m = fw_calloc(1, size);
2122 m->m->u.match_size = size;
2123 strcpy(m->m->u.user.name, m->name);
2124 if (m->init != NULL)
2125 m->init(m->m, &fw.nfcache);
2127 opts = merge_options(opts,
2128 m->extra_opts, &m->option_offset);
2135 exit_error(PARAMETER_PROBLEM,
2143 for (matchp = matches; matchp; matchp = matchp->next)
2144 matchp->match->final_check(matchp->match->mflags);
2147 target->final_check(target->tflags);
2149 /* Fix me: must put inverse options checking here --MN */
2152 exit_error(PARAMETER_PROBLEM,
2153 "unknown arguments found on commandline");
2155 exit_error(PARAMETER_PROBLEM, "no command specified");
2157 exit_error(PARAMETER_PROBLEM,
2158 "nothing appropriate following !");
2160 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND)) {
2161 if (!(options & OPT_DESTINATION))
2162 dhostnetworkmask = "::0/0";
2163 if (!(options & OPT_SOURCE))
2164 shostnetworkmask = "::0/0";
2167 if (shostnetworkmask)
2168 parse_hostnetworkmask(shostnetworkmask, &saddrs,
2169 &(fw.ipv6.smsk), &nsaddrs);
2171 if (dhostnetworkmask)
2172 parse_hostnetworkmask(dhostnetworkmask, &daddrs,
2173 &(fw.ipv6.dmsk), &ndaddrs);
2175 if ((nsaddrs > 1 || ndaddrs > 1) &&
2176 (fw.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
2177 exit_error(PARAMETER_PROBLEM, "! not allowed with multiple"
2178 " source or destination IP addresses");
2180 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
2181 exit_error(PARAMETER_PROBLEM, "Replacement rule does not "
2182 "specify a unique address");
2184 generic_opt_check(command, options);
2186 if (chain && strlen(chain) > IP6T_FUNCTION_MAXNAMELEN)
2187 exit_error(PARAMETER_PROBLEM,
2188 "chain name `%s' too long (must be under %i chars)",
2189 chain, IP6T_FUNCTION_MAXNAMELEN);
2191 /* only allocate handle if we weren't called with a handle */
2193 *handle = ip6tc_init(*table);
2195 /* try to insmod the module if iptc_init failed */
2196 if (!*handle && ip6tables_insmod("ip6_tables", modprobe) != -1)
2197 *handle = ip6tc_init(*table);
2200 exit_error(VERSION_PROBLEM,
2201 "can't initialize ip6tables table `%s': %s",
2202 *table, ip6tc_strerror(errno));
2204 if (command == CMD_APPEND
2205 || command == CMD_DELETE
2206 || command == CMD_INSERT
2207 || command == CMD_REPLACE) {
2208 if (strcmp(chain, "PREROUTING") == 0
2209 || strcmp(chain, "INPUT") == 0) {
2210 /* -o not valid with incoming packets. */
2211 if (options & OPT_VIANAMEOUT)
2212 exit_error(PARAMETER_PROBLEM,
2213 "Can't use -%c with %s\n",
2214 opt2char(OPT_VIANAMEOUT),
2218 if (strcmp(chain, "POSTROUTING") == 0
2219 || strcmp(chain, "OUTPUT") == 0) {
2220 /* -i not valid with outgoing packets */
2221 if (options & OPT_VIANAMEIN)
2222 exit_error(PARAMETER_PROBLEM,
2223 "Can't use -%c with %s\n",
2224 opt2char(OPT_VIANAMEIN),
2228 if (target && ip6tc_is_chain(jumpto, *handle)) {
2229 printf("Warning: using chain %s, not extension\n",
2238 /* If they didn't specify a target, or it's a chain
2239 name, use standard. */
2241 && (strlen(jumpto) == 0
2242 || ip6tc_is_chain(jumpto, *handle))) {
2245 target = find_target(IP6T_STANDARD_TARGET,
2248 size = sizeof(struct ip6t_entry_target)
2250 target->t = fw_calloc(1, size);
2251 target->t->u.target_size = size;
2252 strcpy(target->t->u.user.name, jumpto);
2253 if (target->init != NULL)
2254 target->init(target->t, &fw.nfcache);
2258 /* it is no chain, and we can't load a plugin.
2259 * We cannot know if the plugin is corrupt, non
2260 * existant OR if the user just misspelled a
2262 find_target(jumpto, LOAD_MUST_SUCCEED);
2264 e = generate_entry(&fw, matches, target->t);
2271 ret = append_entry(chain, e,
2272 nsaddrs, saddrs, ndaddrs, daddrs,
2273 options&OPT_VERBOSE,
2277 ret = delete_entry(chain, e,
2278 nsaddrs, saddrs, ndaddrs, daddrs,
2279 options&OPT_VERBOSE,
2282 case CMD_DELETE_NUM:
2283 ret = ip6tc_delete_num_entry(chain, rulenum - 1, handle);
2286 ret = replace_entry(chain, e, rulenum - 1,
2287 saddrs, daddrs, options&OPT_VERBOSE,
2291 ret = insert_entry(chain, e, rulenum - 1,
2292 nsaddrs, saddrs, ndaddrs, daddrs,
2293 options&OPT_VERBOSE,
2297 ret = list_entries(chain,
2298 options&OPT_VERBOSE,
2299 options&OPT_NUMERIC,
2300 options&OPT_EXPANDED,
2301 options&OPT_LINENUMBERS,
2305 ret = flush_entries(chain, options&OPT_VERBOSE, handle);
2308 ret = zero_entries(chain, options&OPT_VERBOSE, handle);
2310 case CMD_LIST|CMD_ZERO:
2311 ret = list_entries(chain,
2312 options&OPT_VERBOSE,
2313 options&OPT_NUMERIC,
2314 options&OPT_EXPANDED,
2315 options&OPT_LINENUMBERS,
2318 ret = zero_entries(chain,
2319 options&OPT_VERBOSE, handle);
2322 ret = ip6tc_create_chain(chain, handle);
2324 case CMD_DELETE_CHAIN:
2325 ret = delete_chain(chain, options&OPT_VERBOSE, handle);
2327 case CMD_RENAME_CHAIN:
2328 ret = ip6tc_rename_chain(chain, newname, handle);
2330 case CMD_SET_POLICY:
2331 ret = ip6tc_set_policy(chain, policy, NULL, handle);
2334 /* We should never reach this... */
2339 dump_entries6(*handle);
2341 clear_rule_matches(&matches);
2348 for (c = 0; c < nsaddrs; c++)
2351 for (c = 0; c < ndaddrs; c++)