1 /* Code to take an iptables-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>
54 #define IP6T_LIB_DIR "/usr/lib/iptables"
57 #ifndef PROC_SYS_MODPROBE
58 #define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
61 #define FMT_NUMERIC 0x0001
62 #define FMT_NOCOUNTS 0x0002
63 #define FMT_KILOMEGAGIGA 0x0004
64 #define FMT_OPTIONS 0x0008
65 #define FMT_NOTABLE 0x0010
66 #define FMT_NOTARGET 0x0020
67 #define FMT_VIA 0x0040
68 #define FMT_NONEWLINE 0x0080
69 #define FMT_LINENUMBERS 0x0100
71 #define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \
72 | FMT_NUMERIC | FMT_NOTABLE)
73 #define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab))
76 #define CMD_NONE 0x0000U
77 #define CMD_INSERT 0x0001U
78 #define CMD_DELETE 0x0002U
79 #define CMD_DELETE_NUM 0x0004U
80 #define CMD_REPLACE 0x0008U
81 #define CMD_APPEND 0x0010U
82 #define CMD_LIST 0x0020U
83 #define CMD_FLUSH 0x0040U
84 #define CMD_ZERO 0x0080U
85 #define CMD_NEW_CHAIN 0x0100U
86 #define CMD_DELETE_CHAIN 0x0200U
87 #define CMD_SET_POLICY 0x0400U
88 #define CMD_CHECK 0x0800U
89 #define CMD_RENAME_CHAIN 0x1000U
90 #define NUMBER_OF_CMD 13
91 static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
94 #define OPTION_OFFSET 256
96 #define OPT_NONE 0x00000U
97 #define OPT_NUMERIC 0x00001U
98 #define OPT_SOURCE 0x00002U
99 #define OPT_DESTINATION 0x00004U
100 #define OPT_PROTOCOL 0x00008U
101 #define OPT_JUMP 0x00010U
102 #define OPT_VERBOSE 0x00020U
103 #define OPT_EXPANDED 0x00040U
104 #define OPT_VIANAMEIN 0x00080U
105 #define OPT_VIANAMEOUT 0x00100U
106 #define OPT_LINENUMBERS 0x00200U
107 #define OPT_COUNTERS 0x00400U
108 #define NUMBER_OF_OPT 11
109 static const char optflags[NUMBER_OF_OPT]
110 = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '3', 'c'};
112 static struct option original_opts[] = {
113 { "append", 1, 0, 'A' },
114 { "delete", 1, 0, 'D' },
115 { "insert", 1, 0, 'I' },
116 { "replace", 1, 0, 'R' },
117 { "list", 2, 0, 'L' },
118 { "flush", 2, 0, 'F' },
119 { "zero", 2, 0, 'Z' },
120 { "new-chain", 1, 0, 'N' },
121 { "delete-chain", 2, 0, 'X' },
122 { "rename-chain", 1, 0, 'E' },
123 { "policy", 1, 0, 'P' },
124 { "source", 1, 0, 's' },
125 { "destination", 1, 0, 'd' },
126 { "src", 1, 0, 's' }, /* synonym */
127 { "dst", 1, 0, 'd' }, /* synonym */
128 { "protocol", 1, 0, 'p' },
129 { "in-interface", 1, 0, 'i' },
130 { "jump", 1, 0, 'j' },
131 { "table", 1, 0, 't' },
132 { "match", 1, 0, 'm' },
133 { "numeric", 0, 0, 'n' },
134 { "out-interface", 1, 0, 'o' },
135 { "verbose", 0, 0, 'v' },
136 { "exact", 0, 0, 'x' },
137 { "version", 0, 0, 'V' },
138 { "help", 2, 0, 'h' },
139 { "line-numbers", 0, 0, '0' },
140 { "modprobe", 1, 0, 'M' },
141 { "set-counters", 1, 0, 'c' },
145 /* we need this for ip6tables-restore. ip6tables-restore.c sets line to the
146 * current line of the input file, in order to give a more precise error
147 * message. ip6tables itself doesn't need this, so it is initialized to the
148 * magic number of -1 */
152 struct ip6t_entry_target *
153 ip6t_get_target(struct ip6t_entry *e)
155 return (void *)e + e->target_offset;
159 static struct option *opts = original_opts;
160 static unsigned int global_option_offset = 0;
162 /* Table of legal combinations of commands and options. If any of the
163 * given commands make an option legal, that option is legal (applies to
164 * CMD_LIST and CMD_ZERO only).
171 static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
172 /* Well, it's better than "Re: Linux vs FreeBSD" */
174 /* -n -s -d -p -j -v -x -i -o --line */
175 /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
176 /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
177 /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x'},
178 /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
179 /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x'},
180 /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' '},
181 /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x'},
182 /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x'},
183 /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
184 /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x'},
185 /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x'},
186 /*CHECK*/ {'x','+','+','+','x',' ','x',' ',' ','x'},
187 /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x'}
190 static int inverse_for_options[NUMBER_OF_OPT] =
193 /* -s */ IP6T_INV_SRCIP,
194 /* -d */ IP6T_INV_DSTIP,
195 /* -p */ IP6T_INV_PROTO,
199 /* -i */ IP6T_INV_VIA_IN,
200 /* -o */ IP6T_INV_VIA_OUT,
204 const char *program_version;
205 const char *program_name;
207 /* Keeping track of external matches and targets: linked lists. */
208 struct ip6tables_match *ip6tables_matches = NULL;
209 struct ip6tables_target *ip6tables_targets = NULL;
211 /* Extra debugging from libiptc */
212 extern void dump_entries6(const ip6tc_handle_t handle);
214 /* A few hardcoded protocols for 'all' and in case the user has no
221 /* Primitive headers... */
222 /* defined in netinet/in.h */
225 #define IPPROTO_ESP 50
228 #define IPPROTO_AH 51
232 static const struct pprot chain_protos[] = {
233 { "tcp", IPPROTO_TCP },
234 { "udp", IPPROTO_UDP },
235 { "icmpv6", IPPROTO_ICMPV6 },
236 { "esp", IPPROTO_ESP },
237 { "ah", IPPROTO_AH },
242 proto_to_name(u_int8_t proto, int nolookup)
246 if (proto && !nolookup) {
247 struct protoent *pent = getprotobynumber(proto);
252 for (i = 0; i < sizeof(chain_protos)/sizeof(struct pprot); i++)
253 if (chain_protos[i].num == proto)
254 return chain_protos[i].name;
260 in6addrcpy(struct in6_addr *dst, struct in6_addr *src)
262 memcpy(dst, src, sizeof(struct in6_addr));
263 /* dst->s6_addr = src->s6_addr; */
267 exit_error(enum exittype status, char *msg, ...)
272 fprintf(stderr, "%s v%s: ", program_name, program_version);
273 vfprintf(stderr, msg, args);
275 fprintf(stderr, "\n");
276 if (status == PARAMETER_PROBLEM)
277 exit_tryhelp(status);
278 if (status == VERSION_PROBLEM)
280 "Perhaps iptables or your kernel needs to be upgraded.\n");
285 exit_tryhelp(int status)
288 fprintf(stderr, "Error occurred at line: %d\n", line);
289 fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
290 program_name, program_name );
297 struct ip6tables_match *m = NULL;
298 struct ip6tables_target *t = NULL;
301 "Usage: %s -[AD] chain rule-specification [options]\n"
302 " %s -[RI] chain rulenum rule-specification [options]\n"
303 " %s -D chain rulenum [options]\n"
304 " %s -[LFZ] [chain] [options]\n"
306 " %s -E old-chain-name new-chain-name\n"
307 " %s -P chain target [options]\n"
308 " %s -h (print this help information)\n\n",
309 program_name, program_version, program_name, program_name,
310 program_name, program_name, program_name, program_name,
311 program_name, program_name);
315 "Either long or short options are allowed.\n"
316 " --append -A chain Append to chain\n"
317 " --delete -D chain Delete matching rule from chain\n"
318 " --delete -D chain rulenum\n"
319 " Delete rule rulenum (1 = first) from chain\n"
320 " --insert -I chain [rulenum]\n"
321 " Insert in chain as rulenum (default 1=first)\n"
322 " --replace -R chain rulenum\n"
323 " Replace rule rulenum (1 = first) in chain\n"
324 " --list -L [chain] List the rules in a chain or all chains\n"
325 " --flush -F [chain] Delete all rules in chain or all chains\n"
326 " --zero -Z [chain] Zero counters in chain or all chains\n"
327 " --new -N chain Create a new user-defined chain\n"
329 " -X [chain] Delete a user-defined chain\n"
330 " --policy -P chain target\n"
331 " Change policy on chain to target\n"
333 " -E old-chain new-chain\n"
334 " Change chain name, (moving any references)\n"
337 " --proto -p [!] proto protocol: by number or name, eg. `tcp'\n"
338 " --source -s [!] address[/mask]\n"
339 " source specification\n"
340 " --destination -d [!] address[/mask]\n"
341 " destination specification\n"
342 " --in-interface -i [!] input name[+]\n"
343 " network interface name ([+] for wildcard)\n"
344 " --jump -j target\n"
345 " target for rule (may load target extension)\n"
346 " --match -m match\n"
347 " extended match (may load extension)\n"
348 " --numeric -n numeric output of addresses and ports\n"
349 " --out-interface -o [!] output name[+]\n"
350 " network interface name ([+] for wildcard)\n"
351 " --table -t table table to manipulate (default: `filter')\n"
352 " --verbose -v verbose mode\n"
353 " --line-numbers print line numbers when listing\n"
354 " --exact -x expand numbers (display exact values)\n"
355 /*"[!] --fragment -f match second or further fragments only\n"*/
356 " --modprobe=<command> try to insert modules using this command\n"
357 " --set-counters PKTS BYTES set the counter during insert/append\n"
358 "[!] --version -V print package version.\n");
360 /* Print out any special helps. A user might like to be able to add a --help
361 to the commandline, and see expected results. So we call help for all
363 for (t=ip6tables_targets;t;t=t->next) {
367 for (m=ip6tables_matches;m;m=m->next) {
375 generic_opt_check(int command, int options)
379 /* Check that commands are valid with options. Complicated by the
380 * fact that if an option is legal with *any* command given, it is
381 * legal overall (ie. -z and -l).
383 for (i = 0; i < NUMBER_OF_OPT; i++) {
384 legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
386 for (j = 0; j < NUMBER_OF_CMD; j++) {
387 if (!(command & (1<<j)))
390 if (!(options & (1<<i))) {
391 if (commands_v_options[j][i] == '+')
392 exit_error(PARAMETER_PROBLEM,
393 "You need to supply the `-%c' "
394 "option for this command\n",
397 if (commands_v_options[j][i] != 'x')
404 exit_error(PARAMETER_PROBLEM,
405 "Illegal option `-%c' with this command\n",
414 for (ptr = optflags; option > 1; option >>= 1, ptr++);
423 for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
429 add_command(int *cmd, const int newcmd, const int othercmds, int invert)
432 exit_error(PARAMETER_PROBLEM, "unexpected ! flag");
433 if (*cmd & (~othercmds))
434 exit_error(PARAMETER_PROBLEM, "Can't use -%c with -%c\n",
435 cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
440 check_inverse(const char option[], int *invert, int *optind, int argc)
442 if (option && strcmp(option, "!") == 0) {
444 exit_error(PARAMETER_PROBLEM,
445 "Multiple `!' flags not allowed");
449 if (argc && *optind > argc)
450 exit_error(PARAMETER_PROBLEM,
451 "no argument following `!'");
460 fw_calloc(size_t count, size_t size)
464 if ((p = calloc(count, size)) == NULL) {
465 perror("ip6tables: calloc failed");
472 fw_malloc(size_t size)
476 if ((p = malloc(size)) == NULL) {
477 perror("ip6tables: malloc failed");
484 addr_to_numeric(const struct in6_addr *addrp)
486 /* 0000:0000:0000:0000:0000:000.000.000.000
487 * 0000:0000:0000:0000:0000:0000:0000:0000 */
488 static char buf[50+1];
489 return (char *)inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
492 static struct in6_addr *
493 numeric_to_addr(const char *num)
495 static struct in6_addr ap;
497 if ((err=inet_pton(AF_INET6, num, &ap)) == 1)
500 fprintf(stderr, "\nnumeric2addr: %d\n", err);
502 return (struct in6_addr *)NULL;
506 static struct in6_addr *
507 host_to_addr(const char *name, unsigned int *naddr)
509 struct addrinfo hints;
510 struct addrinfo *res;
511 static struct in6_addr *addr;
514 memset(&hints, 0, sizeof(hints));
515 hints.ai_flags=AI_CANONNAME;
516 hints.ai_family=AF_INET6;
517 hints.ai_socktype=SOCK_RAW;
518 hints.ai_protocol=41;
522 if ( (err=getaddrinfo(name, NULL, &hints, &res)) != 0 ){
524 fprintf(stderr,"Name2IP: %s\n",gai_strerror(err));
526 return (struct in6_addr *) NULL;
528 if (res->ai_family != AF_INET6 ||
529 res->ai_addrlen != sizeof(struct sockaddr_in6))
530 return (struct in6_addr *) NULL;
533 fprintf(stderr, "resolved: len=%d %s ", res->ai_addrlen,
534 addr_to_numeric(&(((struct sockaddr_in6 *)res->ai_addr)->sin6_addr)));
536 /* Get the first element of the address-chain */
537 addr = fw_calloc(1, sizeof(struct in6_addr));
538 in6addrcpy(addr, (struct in6_addr *)
539 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr);
545 return (struct in6_addr *) NULL;
549 addr_to_host(const struct in6_addr *addr)
551 struct sockaddr_in6 saddr;
553 static char hostname[NI_MAXHOST];
555 memset(&saddr, 0, sizeof(struct sockaddr_in6));
556 in6addrcpy(&(saddr.sin6_addr),(struct in6_addr *)addr);
557 saddr.sin6_family = AF_INET6;
559 if ( (err=getnameinfo((struct sockaddr *)&saddr,
560 sizeof(struct sockaddr_in6),
561 hostname, sizeof(hostname)-1,
564 fprintf(stderr,"IP2Name: %s\n",gai_strerror(err));
566 return (char *) NULL;
569 fprintf (stderr, "\naddr2host: %s\n", hostname);
575 return (char *) NULL;
579 mask_to_numeric(const struct in6_addr *addrp)
581 static char buf[50+2];
582 int l = ipv6_prefix_length(addrp);
585 strcat(buf, addr_to_numeric(addrp));
588 sprintf(buf, "/%d", l);
592 static struct in6_addr *
593 network_to_addr(const char *name)
596 /* TODO: not implemented yet, but the exception breaks the
597 * name resolvation */
598 return (struct in6_addr *)NULL;
602 addr_to_anyname(const struct in6_addr *addr)
606 if ((name = addr_to_host(addr)) != NULL)
609 return addr_to_numeric(addr);
613 * All functions starting with "parse" should succeed, otherwise
615 * Most routines return pointers to static data that may change
616 * between calls to the same or other routines with a few exceptions:
617 * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
618 * return global static data.
621 static struct in6_addr *
622 parse_hostnetwork(const char *name, unsigned int *naddrs)
624 struct in6_addr *addrp, *addrptmp;
626 if ((addrptmp = numeric_to_addr(name)) != NULL ||
627 (addrptmp = network_to_addr(name)) != NULL) {
628 addrp = fw_malloc(sizeof(struct in6_addr));
629 in6addrcpy(addrp, addrptmp);
633 if ((addrp = host_to_addr(name, naddrs)) != NULL)
636 exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
639 static struct in6_addr *
640 parse_mask(char *mask)
642 static struct in6_addr maskaddr;
643 struct in6_addr *addrp;
647 /* no mask at all defaults to 128 bits */
648 memset(&maskaddr, 0xff, sizeof maskaddr);
651 if ((addrp = numeric_to_addr(mask)) != NULL)
653 if (string_to_number(mask, 0, 128, &bits) == -1)
654 exit_error(PARAMETER_PROBLEM,
655 "invalid mask `%s' specified", mask);
657 char *p = (char *)&maskaddr;
658 memset(p, 0xff, bits / 8);
659 memset(p + (bits / 8) + 1, 0, (128 - bits) / 8);
660 p[bits / 8] = 0xff << (8 - (bits & 7));
664 memset(&maskaddr, 0, sizeof maskaddr);
669 parse_hostnetworkmask(const char *name, struct in6_addr **addrpp,
670 struct in6_addr *maskp, unsigned int *naddrs)
672 struct in6_addr *addrp;
677 strncpy(buf, name, sizeof(buf) - 1);
678 if ((p = strrchr(buf, '/')) != NULL) {
680 addrp = parse_mask(p + 1);
682 addrp = parse_mask(NULL);
683 in6addrcpy(maskp, addrp);
685 /* if a null mask is given, the name is ignored, like in "any/0" */
686 if (!memcmp(maskp, &in6addr_any, sizeof(in6addr_any)))
689 addrp = *addrpp = parse_hostnetwork(buf, naddrs);
691 for (i = 0, j = 0; i < n; i++) {
693 for (k = 0; k < 4; k++)
694 addrp[j].in6_u.u6_addr32[k] &= maskp->in6_u.u6_addr32[k];
696 for (k = 0; k < j - 1; k++) {
697 if (IN6_ARE_ADDR_EQUAL(&addrp[k], &addrp[j - 1])) {
706 struct ip6tables_match *
707 find_match(const char *name, enum ip6t_tryload tryload)
709 struct ip6tables_match *ptr;
712 /* This is ugly as hell. Nonetheless, there is no way of changing
713 * this without hurting backwards compatibility */
714 if ( (strcmp(name,"icmpv6") == 0) ||
715 (strcmp(name,"ipv6-icmp") == 0) ||
716 (strcmp(name,"icmp6") == 0) ) icmphack = 1;
719 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
720 if (strcmp(name, ptr->name) == 0)
724 for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
725 if (strcmp("icmp6", ptr->name) == 0)
730 #ifndef NO_SHARED_LIBS
731 if (!ptr && tryload != DONT_LOAD) {
732 char path[sizeof(IP6T_LIB_DIR) + sizeof("/libip6t_.so")
735 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", name);
737 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", "icmpv6");
738 if (dlopen(path, RTLD_NOW)) {
739 /* Found library. If it didn't register itself,
740 maybe they specified target as match. */
741 ptr = find_match(name, DONT_LOAD);
744 exit_error(PARAMETER_PROBLEM,
745 "Couldn't load match `%s'\n",
747 } else if (tryload == LOAD_MUST_SUCCEED)
748 exit_error(PARAMETER_PROBLEM,
749 "Couldn't load match `%s':%s\n",
753 if (ptr && !ptr->loaded) {
754 if (tryload != DONT_LOAD)
759 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
760 exit_error(PARAMETER_PROBLEM,
761 "Couldn't find match `%s'\n", name);
771 /* Christophe Burki wants `-p 6' to imply `-m tcp'. */
772 static struct ip6tables_match *
773 find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup)
777 if (string_to_number(pname, 0, 255, &proto) != -1) {
778 char *protoname = proto_to_name(proto, nolookup);
781 return find_match(protoname, tryload);
783 return find_match(pname, tryload);
789 parse_protocol(const char *s)
793 if (string_to_number(s, 0, 255, &proto) == -1) {
794 struct protoent *pent;
796 if ((pent = getprotobyname(s)))
797 proto = pent->p_proto;
801 i < sizeof(chain_protos)/sizeof(struct pprot);
803 if (strcmp(s, chain_protos[i].name) == 0) {
804 proto = chain_protos[i].num;
808 if (i == sizeof(chain_protos)/sizeof(struct pprot))
809 exit_error(PARAMETER_PROBLEM,
810 "unknown protocol `%s' specified",
815 return (u_int16_t)proto;
819 parse_interface(const char *arg, char *vianame, unsigned char *mask)
821 int vialen = strlen(arg);
824 memset(mask, 0, IFNAMSIZ);
825 memset(vianame, 0, IFNAMSIZ);
827 if (vialen + 1 > IFNAMSIZ)
828 exit_error(PARAMETER_PROBLEM,
829 "interface name `%s' must be shorter than IFNAMSIZ"
830 " (%i)", arg, IFNAMSIZ-1);
832 strcpy(vianame, arg);
834 memset(mask, 0, IFNAMSIZ);
835 else if (vianame[vialen - 1] == '+') {
836 memset(mask, 0xFF, vialen - 1);
837 memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1);
838 /* Don't remove `+' here! -HW */
840 /* Include nul-terminator in match */
841 memset(mask, 0xFF, vialen + 1);
842 memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1);
843 for (i = 0; vianame[i]; i++) {
844 if (!isalnum(vianame[i])
846 && vianame[i] != '.') {
847 printf("Warning: wierd character in interface"
848 " `%s' (No aliases, :, ! or *).\n",
858 parse_rulenumber(const char *rule)
860 unsigned int rulenum;
862 if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1)
863 exit_error(PARAMETER_PROBLEM,
864 "Invalid rule number `%s'", rule);
870 parse_target(const char *targetname)
874 if (strlen(targetname) < 1)
875 exit_error(PARAMETER_PROBLEM,
876 "Invalid target name (too short)");
878 if (strlen(targetname)+1 > sizeof(ip6t_chainlabel))
879 exit_error(PARAMETER_PROBLEM,
880 "Invalid target name `%s' (%i chars max)",
881 targetname, sizeof(ip6t_chainlabel)-1);
883 for (ptr = targetname; *ptr; ptr++)
885 exit_error(PARAMETER_PROBLEM,
886 "Invalid target name `%s'", targetname);
891 string_to_number(const char *s, unsigned int min, unsigned int max,
897 /* Handle hex, octal, etc. */
899 number = strtol(s, &end, 0);
900 if (*end == '\0' && end != s) {
901 /* we parsed a number, let's see if we want this */
902 if (errno != ERANGE && min <= number && number <= max) {
911 set_option(unsigned int *options, unsigned int option, u_int8_t *invflg,
914 if (*options & option)
915 exit_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
921 for (i = 0; 1 << i != option; i++);
923 if (!inverse_for_options[i])
924 exit_error(PARAMETER_PROBLEM,
925 "cannot have ! before -%c",
927 *invflg |= inverse_for_options[i];
931 struct ip6tables_target *
932 find_target(const char *name, enum ip6t_tryload tryload)
934 struct ip6tables_target *ptr;
936 /* Standard target? */
937 if (strcmp(name, "") == 0
938 || strcmp(name, IP6TC_LABEL_ACCEPT) == 0
939 || strcmp(name, IP6TC_LABEL_DROP) == 0
940 || strcmp(name, IP6TC_LABEL_QUEUE) == 0
941 || strcmp(name, IP6TC_LABEL_RETURN) == 0)
944 for (ptr = ip6tables_targets; ptr; ptr = ptr->next) {
945 if (strcmp(name, ptr->name) == 0)
949 #ifndef NO_SHARED_LIBS
950 if (!ptr && tryload != DONT_LOAD) {
951 char path[sizeof(IP6T_LIB_DIR) + sizeof("/libip6t_.so")
953 sprintf(path, IP6T_LIB_DIR "/libip6t_%s.so", name);
954 if (dlopen(path, RTLD_NOW)) {
955 /* Found library. If it didn't register itself,
956 maybe they specified match as a target. */
957 ptr = find_target(name, DONT_LOAD);
959 exit_error(PARAMETER_PROBLEM,
960 "Couldn't load target `%s'\n",
962 } else if (tryload == LOAD_MUST_SUCCEED)
963 exit_error(PARAMETER_PROBLEM,
964 "Couldn't load target `%s':%s\n",
968 if (ptr && !ptr->loaded) {
969 if (tryload != DONT_LOAD)
974 if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
975 exit_error(PARAMETER_PROBLEM,
976 "Couldn't find target `%s'\n", name);
986 static struct option *
987 merge_options(struct option *oldopts, const struct option *newopts,
988 unsigned int *option_offset)
990 unsigned int num_old, num_new, i;
991 struct option *merge;
993 for (num_old = 0; oldopts[num_old].name; num_old++);
994 for (num_new = 0; newopts[num_new].name; num_new++);
996 global_option_offset += OPTION_OFFSET;
997 *option_offset = global_option_offset;
999 merge = malloc(sizeof(struct option) * (num_new + num_old + 1));
1000 memcpy(merge, oldopts, num_old * sizeof(struct option));
1001 for (i = 0; i < num_new; i++) {
1002 merge[num_old + i] = newopts[i];
1003 merge[num_old + i].val += *option_offset;
1005 memset(merge + num_old + num_new, 0, sizeof(struct option));
1011 register_match6(struct ip6tables_match *me)
1013 struct ip6tables_match **i;
1015 if (strcmp(me->version, program_version) != 0) {
1016 fprintf(stderr, "%s: match `%s' v%s (I'm v%s).\n",
1017 program_name, me->name, me->version, program_version);
1021 if (find_match(me->name, DONT_LOAD)) {
1022 fprintf(stderr, "%s: match `%s' already registered.\n",
1023 program_name, me->name);
1027 if (me->size != IP6T_ALIGN(me->size)) {
1028 fprintf(stderr, "%s: match `%s' has invalid size %u.\n",
1029 program_name, me->name, me->size);
1033 /* Append to list. */
1034 for (i = &ip6tables_matches; *i; i = &(*i)->next);
1043 register_target6(struct ip6tables_target *me)
1045 if (strcmp(me->version, program_version) != 0) {
1046 fprintf(stderr, "%s: target `%s' v%s (I'm v%s).\n",
1047 program_name, me->name, me->version, program_version);
1051 if (find_target(me->name, DONT_LOAD)) {
1052 fprintf(stderr, "%s: target `%s' already registered.\n",
1053 program_name, me->name);
1057 if (me->size != IP6T_ALIGN(me->size)) {
1058 fprintf(stderr, "%s: target `%s' has invalid size %u.\n",
1059 program_name, me->name, me->size);
1063 /* Prepend to list. */
1064 me->next = ip6tables_targets;
1065 ip6tables_targets = me;
1071 print_num(u_int64_t number, unsigned int format)
1073 if (format & FMT_KILOMEGAGIGA) {
1074 if (number > 99999) {
1075 number = (number + 500) / 1000;
1076 if (number > 9999) {
1077 number = (number + 500) / 1000;
1078 if (number > 9999) {
1079 number = (number + 500) / 1000;
1080 if (number > 9999) {
1081 number = (number + 500) / 1000;
1082 printf(FMT("%4lluT ","%lluT "), number);
1084 else printf(FMT("%4lluG ","%lluG "), number);
1086 else printf(FMT("%4lluM ","%lluM "), number);
1088 printf(FMT("%4lluK ","%lluK "), number);
1090 printf(FMT("%5llu ","%llu "), number);
1092 printf(FMT("%8llu ","%llu "), number);
1097 print_header(unsigned int format, const char *chain, ip6tc_handle_t *handle)
1099 struct ip6t_counters counters;
1100 const char *pol = ip6tc_get_policy(chain, &counters, handle);
1101 printf("Chain %s", chain);
1103 printf(" (policy %s", pol);
1104 if (!(format & FMT_NOCOUNTS)) {
1106 print_num(counters.pcnt, (format|FMT_NOTABLE));
1107 fputs("packets, ", stdout);
1108 print_num(counters.bcnt, (format|FMT_NOTABLE));
1109 fputs("bytes", stdout);
1114 if (!ip6tc_get_references(&refs, chain, handle))
1115 printf(" (ERROR obtaining refs)\n");
1117 printf(" (%u references)\n", refs);
1120 if (format & FMT_LINENUMBERS)
1121 printf(FMT("%-4s ", "%s "), "num");
1122 if (!(format & FMT_NOCOUNTS)) {
1123 if (format & FMT_KILOMEGAGIGA) {
1124 printf(FMT("%5s ","%s "), "pkts");
1125 printf(FMT("%5s ","%s "), "bytes");
1127 printf(FMT("%8s ","%s "), "pkts");
1128 printf(FMT("%10s ","%s "), "bytes");
1131 if (!(format & FMT_NOTARGET))
1132 printf(FMT("%-9s ","%s "), "target");
1133 fputs(" prot ", stdout);
1134 if (format & FMT_OPTIONS)
1135 fputs("opt", stdout);
1136 if (format & FMT_VIA) {
1137 printf(FMT(" %-6s ","%s "), "in");
1138 printf(FMT("%-6s ","%s "), "out");
1140 printf(FMT(" %-19s ","%s "), "source");
1141 printf(FMT(" %-19s "," %s "), "destination");
1147 print_match(const struct ip6t_entry_match *m,
1148 const struct ip6t_ip6 *ip,
1151 struct ip6tables_match *match = find_match(m->u.user.name, TRY_LOAD);
1155 match->print(ip, m, numeric);
1157 printf("%s ", match->name);
1159 if (m->u.user.name[0])
1160 printf("UNKNOWN match `%s' ", m->u.user.name);
1162 /* Don't stop iterating. */
1166 /* e is called `fw' here for hysterical raisins */
1168 print_firewall(const struct ip6t_entry *fw,
1169 const char *targname,
1171 unsigned int format,
1172 const ip6tc_handle_t handle)
1174 struct ip6tables_target *target = NULL;
1175 const struct ip6t_entry_target *t;
1179 if (!ip6tc_is_chain(targname, handle))
1180 target = find_target(targname, TRY_LOAD);
1182 target = find_target(IP6T_STANDARD_TARGET, LOAD_MUST_SUCCEED);
1184 t = ip6t_get_target((struct ip6t_entry *)fw);
1185 flags = fw->ipv6.flags;
1187 if (format & FMT_LINENUMBERS)
1188 printf(FMT("%-4u ", "%u "), num+1);
1190 if (!(format & FMT_NOCOUNTS)) {
1191 print_num(fw->counters.pcnt, format);
1192 print_num(fw->counters.bcnt, format);
1195 if (!(format & FMT_NOTARGET))
1196 printf(FMT("%-9s ", "%s "), targname);
1198 fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout);
1200 char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC);
1202 printf(FMT("%-5s", "%s "), pname);
1204 printf(FMT("%-5hu", "%hu "), fw->ipv6.proto);
1207 if (format & FMT_OPTIONS) {
1208 if (format & FMT_NOTABLE)
1209 fputs("opt ", stdout);
1210 fputc(' ', stdout); /* Invert flag of FRAG */
1211 fputc(' ', stdout); /* -f */
1215 if (format & FMT_VIA) {
1216 char iface[IFNAMSIZ+2];
1218 if (fw->ipv6.invflags & IP6T_INV_VIA_IN) {
1222 else iface[0] = '\0';
1224 if (fw->ipv6.iniface[0] != '\0') {
1225 strcat(iface, fw->ipv6.iniface);
1227 else if (format & FMT_NUMERIC) strcat(iface, "*");
1228 else strcat(iface, "any");
1229 printf(FMT(" %-6s ","in %s "), iface);
1231 if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) {
1235 else iface[0] = '\0';
1237 if (fw->ipv6.outiface[0] != '\0') {
1238 strcat(iface, fw->ipv6.outiface);
1240 else if (format & FMT_NUMERIC) strcat(iface, "*");
1241 else strcat(iface, "any");
1242 printf(FMT("%-6s ","out %s "), iface);
1245 fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout);
1246 if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any)
1247 && !(format & FMT_NUMERIC))
1248 printf(FMT("%-19s ","%s "), "anywhere");
1250 if (format & FMT_NUMERIC)
1251 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.src)));
1253 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.src)));
1254 strcat(buf, mask_to_numeric(&(fw->ipv6.smsk)));
1255 printf(FMT("%-19s ","%s "), buf);
1258 fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout);
1259 if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any)
1260 && !(format & FMT_NUMERIC))
1261 printf(FMT("%-19s","-> %s"), "anywhere");
1263 if (format & FMT_NUMERIC)
1264 sprintf(buf, "%s", addr_to_numeric(&(fw->ipv6.dst)));
1266 sprintf(buf, "%s", addr_to_anyname(&(fw->ipv6.dst)));
1267 strcat(buf, mask_to_numeric(&(fw->ipv6.dmsk)));
1268 printf(FMT("%-19s","-> %s"), buf);
1271 if (format & FMT_NOTABLE)
1274 IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC);
1278 /* Print the target information. */
1279 target->print(&fw->ipv6, t, format & FMT_NUMERIC);
1280 } else if (t->u.target_size != sizeof(*t))
1281 printf("[%u bytes of unknown target data] ",
1282 t->u.target_size - sizeof(*t));
1284 if (!(format & FMT_NONEWLINE))
1285 fputc('\n', stdout);
1289 print_firewall_line(const struct ip6t_entry *fw,
1290 const ip6tc_handle_t h)
1292 struct ip6t_entry_target *t;
1294 t = ip6t_get_target((struct ip6t_entry *)fw);
1295 print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
1299 append_entry(const ip6t_chainlabel chain,
1300 struct ip6t_entry *fw,
1301 unsigned int nsaddrs,
1302 const struct in6_addr saddrs[],
1303 unsigned int ndaddrs,
1304 const struct in6_addr daddrs[],
1306 ip6tc_handle_t *handle)
1311 for (i = 0; i < nsaddrs; i++) {
1312 fw->ipv6.src = saddrs[i];
1313 for (j = 0; j < ndaddrs; j++) {
1314 fw->ipv6.dst = daddrs[j];
1316 print_firewall_line(fw, *handle);
1317 ret &= ip6tc_append_entry(chain, fw, handle);
1325 replace_entry(const ip6t_chainlabel chain,
1326 struct ip6t_entry *fw,
1327 unsigned int rulenum,
1328 const struct in6_addr *saddr,
1329 const struct in6_addr *daddr,
1331 ip6tc_handle_t *handle)
1333 fw->ipv6.src = *saddr;
1334 fw->ipv6.dst = *daddr;
1337 print_firewall_line(fw, *handle);
1338 return ip6tc_replace_entry(chain, fw, rulenum, handle);
1342 insert_entry(const ip6t_chainlabel chain,
1343 struct ip6t_entry *fw,
1344 unsigned int rulenum,
1345 unsigned int nsaddrs,
1346 const struct in6_addr saddrs[],
1347 unsigned int ndaddrs,
1348 const struct in6_addr daddrs[],
1350 ip6tc_handle_t *handle)
1355 for (i = 0; i < nsaddrs; i++) {
1356 fw->ipv6.src = saddrs[i];
1357 for (j = 0; j < ndaddrs; j++) {
1358 fw->ipv6.dst = daddrs[j];
1360 print_firewall_line(fw, *handle);
1361 ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
1368 static unsigned char *
1369 make_delete_mask(struct ip6t_entry *fw)
1371 /* Establish mask for comparison */
1373 struct ip6tables_match *m;
1374 unsigned char *mask, *mptr;
1376 size = sizeof(struct ip6t_entry);
1377 for (m = ip6tables_matches; m; m = m->next) {
1381 size += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + m->size;
1384 mask = fw_calloc(1, size
1385 + IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1386 + ip6tables_targets->size);
1388 memset(mask, 0xFF, sizeof(struct ip6t_entry));
1389 mptr = mask + sizeof(struct ip6t_entry);
1391 for (m = ip6tables_matches; m; m = m->next) {
1396 IP6T_ALIGN(sizeof(struct ip6t_entry_match))
1397 + m->userspacesize);
1398 mptr += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + m->size;
1402 IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1403 + ip6tables_targets->userspacesize);
1409 delete_entry(const ip6t_chainlabel chain,
1410 struct ip6t_entry *fw,
1411 unsigned int nsaddrs,
1412 const struct in6_addr saddrs[],
1413 unsigned int ndaddrs,
1414 const struct in6_addr daddrs[],
1416 ip6tc_handle_t *handle)
1420 unsigned char *mask;
1422 mask = make_delete_mask(fw);
1423 for (i = 0; i < nsaddrs; i++) {
1424 fw->ipv6.src = saddrs[i];
1425 for (j = 0; j < ndaddrs; j++) {
1426 fw->ipv6.dst = daddrs[j];
1428 print_firewall_line(fw, *handle);
1429 ret &= ip6tc_delete_entry(chain, fw, mask, handle);
1436 for_each_chain(int (*fn)(const ip6t_chainlabel, int, ip6tc_handle_t *),
1437 int verbose, int builtinstoo, ip6tc_handle_t *handle)
1442 unsigned int i, chaincount = 0;
1444 chain = ip6tc_first_chain(handle);
1447 chain = ip6tc_next_chain(handle);
1450 chains = fw_malloc(sizeof(ip6t_chainlabel) * chaincount);
1452 chain = ip6tc_first_chain(handle);
1454 strcpy(chains + i*sizeof(ip6t_chainlabel), chain);
1456 chain = ip6tc_next_chain(handle);
1459 for (i = 0; i < chaincount; i++) {
1461 && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel),
1464 ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle);
1472 flush_entries(const ip6t_chainlabel chain, int verbose,
1473 ip6tc_handle_t *handle)
1476 return for_each_chain(flush_entries, verbose, 1, handle);
1479 fprintf(stdout, "Flushing chain `%s'\n", chain);
1480 return ip6tc_flush_entries(chain, handle);
1484 zero_entries(const ip6t_chainlabel chain, int verbose,
1485 ip6tc_handle_t *handle)
1488 return for_each_chain(zero_entries, verbose, 1, handle);
1491 fprintf(stdout, "Zeroing chain `%s'\n", chain);
1492 return ip6tc_zero_entries(chain, handle);
1496 delete_chain(const ip6t_chainlabel chain, int verbose,
1497 ip6tc_handle_t *handle)
1500 return for_each_chain(delete_chain, verbose, 0, handle);
1503 fprintf(stdout, "Deleting chain `%s'\n", chain);
1504 return ip6tc_delete_chain(chain, handle);
1508 list_entries(const ip6t_chainlabel chain, int verbose, int numeric,
1509 int expanded, int linenumbers, ip6tc_handle_t *handle)
1512 unsigned int format;
1515 format = FMT_OPTIONS;
1517 format |= FMT_NOCOUNTS;
1522 format |= FMT_NUMERIC;
1525 format |= FMT_KILOMEGAGIGA;
1528 format |= FMT_LINENUMBERS;
1530 for (this = ip6tc_first_chain(handle);
1532 this = ip6tc_next_chain(handle)) {
1533 const struct ip6t_entry *i;
1536 if (chain && strcmp(chain, this) != 0)
1539 if (found) printf("\n");
1541 print_header(format, this, handle);
1542 i = ip6tc_first_rule(this, handle);
1547 ip6tc_get_target(i, handle),
1551 i = ip6tc_next_rule(i, handle);
1560 static char *get_modprobe(void)
1565 procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
1571 switch (read(procfile, ret, 1024)) {
1573 case 1024: goto fail; /* Partial read. Wierd */
1575 if (ret[strlen(ret)-1]=='\n')
1576 ret[strlen(ret)-1]=0;
1586 int ip6tables_insmod(const char *modname, const char *modprobe)
1592 /* If they don't explicitly set it, read out of kernel */
1594 buf = get_modprobe();
1602 /* close open file descriptors */
1603 for (i=0; i< 10; i++) {
1606 argv[0] = (char *)modprobe;
1607 argv[1] = (char *)modname;
1609 execv(argv[0], argv);
1611 /* not usually reached */
1616 default: /* parent */
1624 static struct ip6t_entry *
1625 generate_entry(const struct ip6t_entry *fw,
1626 struct ip6tables_match *matches,
1627 struct ip6t_entry_target *target)
1630 struct ip6tables_match *m;
1631 struct ip6t_entry *e;
1633 size = sizeof(struct ip6t_entry);
1634 for (m = matches; m; m = m->next) {
1638 size += m->m->u.match_size;
1641 e = fw_malloc(size + target->u.target_size);
1643 e->target_offset = size;
1644 e->next_offset = size + target->u.target_size;
1647 for (m = matches; m; m = m->next) {
1651 memcpy(e->elems + size, m->m, m->m->u.match_size);
1652 size += m->m->u.match_size;
1654 memcpy(e->elems + size, target, target->u.target_size);
1659 int do_command6(int argc, char *argv[], char **table, ip6tc_handle_t *handle)
1661 struct ip6t_entry fw, *e = NULL;
1663 unsigned int nsaddrs = 0, ndaddrs = 0;
1664 struct in6_addr *saddrs = NULL, *daddrs = NULL;
1667 const char *chain = NULL;
1668 const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
1669 const char *policy = NULL, *newname = NULL;
1670 unsigned int rulenum = 0, options = 0, command = 0;
1671 const char *pcnt = NULL, *bcnt = NULL;
1673 struct ip6tables_match *m;
1674 struct ip6tables_target *target = NULL;
1675 struct ip6tables_target *t;
1676 const char *jumpto = "";
1677 char *protocol = NULL;
1678 const char *modprobe = NULL;
1680 char icmp6p[] = "icmpv6";
1682 memset(&fw, 0, sizeof(fw));
1684 opts = original_opts;
1685 global_option_offset = 0;
1687 /* re-set optind to 0 in case do_command gets called
1691 /* clear mflags in case do_command gets called a second time
1692 * (we clear the global list of all matches for security)*/
1693 for (m = ip6tables_matches; m; m = m->next) {
1698 for (t = ip6tables_targets; t; t = t->next) {
1703 /* Suppress error messages: we may add new options if we
1704 demand-load a protocol. */
1707 while ((c = getopt_long(argc, argv,
1708 "-A:D:R:I:L::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:",
1709 opts, NULL)) != -1) {
1715 add_command(&command, CMD_APPEND, CMD_NONE,
1721 add_command(&command, CMD_DELETE, CMD_NONE,
1724 if (optind < argc && argv[optind][0] != '-'
1725 && argv[optind][0] != '!') {
1726 rulenum = parse_rulenumber(argv[optind++]);
1727 command = CMD_DELETE_NUM;
1732 add_command(&command, CMD_REPLACE, CMD_NONE,
1735 if (optind < argc && argv[optind][0] != '-'
1736 && argv[optind][0] != '!')
1737 rulenum = parse_rulenumber(argv[optind++]);
1739 exit_error(PARAMETER_PROBLEM,
1740 "-%c requires a rule number",
1741 cmd2char(CMD_REPLACE));
1745 add_command(&command, CMD_INSERT, CMD_NONE,
1748 if (optind < argc && argv[optind][0] != '-'
1749 && argv[optind][0] != '!')
1750 rulenum = parse_rulenumber(argv[optind++]);
1755 add_command(&command, CMD_LIST, CMD_ZERO,
1757 if (optarg) chain = optarg;
1758 else if (optind < argc && argv[optind][0] != '-'
1759 && argv[optind][0] != '!')
1760 chain = argv[optind++];
1764 add_command(&command, CMD_FLUSH, CMD_NONE,
1766 if (optarg) chain = optarg;
1767 else if (optind < argc && argv[optind][0] != '-'
1768 && argv[optind][0] != '!')
1769 chain = argv[optind++];
1773 add_command(&command, CMD_ZERO, CMD_LIST,
1775 if (optarg) chain = optarg;
1776 else if (optind < argc && argv[optind][0] != '-'
1777 && argv[optind][0] != '!')
1778 chain = argv[optind++];
1782 if (optarg && *optarg == '-')
1783 exit_error(PARAMETER_PROBLEM,
1784 "chain name not allowed to start "
1786 if (find_target(optarg, TRY_LOAD))
1787 exit_error(PARAMETER_PROBLEM,
1788 "chain name may not clash "
1789 "with target name\n");
1790 add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
1796 add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
1798 if (optarg) chain = optarg;
1799 else if (optind < argc && argv[optind][0] != '-'
1800 && argv[optind][0] != '!')
1801 chain = argv[optind++];
1805 add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
1808 if (optind < argc && argv[optind][0] != '-'
1809 && argv[optind][0] != '!')
1810 newname = argv[optind++];
1812 exit_error(PARAMETER_PROBLEM,
1813 "-%c requires old-chain-name and "
1815 cmd2char(CMD_RENAME_CHAIN));
1819 add_command(&command, CMD_SET_POLICY, CMD_NONE,
1822 if (optind < argc && argv[optind][0] != '-'
1823 && argv[optind][0] != '!')
1824 policy = argv[optind++];
1826 exit_error(PARAMETER_PROBLEM,
1827 "-%c requires a chain and a policy",
1828 cmd2char(CMD_SET_POLICY));
1833 optarg = argv[optind];
1835 /* iptables -p icmp -h */
1836 if (!ip6tables_matches && protocol)
1837 find_match(protocol, TRY_LOAD);
1845 check_inverse(optarg, &invert, &optind, argc);
1846 set_option(&options, OPT_PROTOCOL, &fw.ipv6.invflags,
1849 /* Canonicalize into lower case */
1850 for (protocol = argv[optind-1]; *protocol; protocol++)
1851 *protocol = tolower(*protocol);
1853 protocol = argv[optind-1];
1854 if ( strcmp(protocol,"ipv6-icmp") == 0)
1856 fw.ipv6.proto = parse_protocol(protocol);
1857 fw.ipv6.flags |= IP6T_F_PROTO;
1859 if (fw.ipv6.proto == 0
1860 && (fw.ipv6.invflags & IP6T_INV_PROTO))
1861 exit_error(PARAMETER_PROBLEM,
1862 "rule would never match protocol");
1863 fw.nfcache |= NFC_IP6_PROTO;
1867 check_inverse(optarg, &invert, &optind, argc);
1868 set_option(&options, OPT_SOURCE, &fw.ipv6.invflags,
1870 shostnetworkmask = argv[optind-1];
1871 fw.nfcache |= NFC_IP6_SRC;
1875 check_inverse(optarg, &invert, &optind, argc);
1876 set_option(&options, OPT_DESTINATION, &fw.ipv6.invflags,
1878 dhostnetworkmask = argv[optind-1];
1879 fw.nfcache |= NFC_IP6_DST;
1883 set_option(&options, OPT_JUMP, &fw.ipv6.invflags,
1885 jumpto = parse_target(optarg);
1886 /* TRY_LOAD (may be chain name) */
1887 target = find_target(jumpto, TRY_LOAD);
1892 size = IP6T_ALIGN(sizeof(struct ip6t_entry_target))
1895 target->t = fw_calloc(1, size);
1896 target->t->u.target_size = size;
1897 strcpy(target->t->u.user.name, jumpto);
1898 target->init(target->t, &fw.nfcache);
1899 opts = merge_options(opts, target->extra_opts, &target->option_offset);
1905 check_inverse(optarg, &invert, &optind, argc);
1906 set_option(&options, OPT_VIANAMEIN, &fw.ipv6.invflags,
1908 parse_interface(argv[optind-1],
1910 fw.ipv6.iniface_mask);
1911 fw.nfcache |= NFC_IP6_IF_IN;
1915 check_inverse(optarg, &invert, &optind, argc);
1916 set_option(&options, OPT_VIANAMEOUT, &fw.ipv6.invflags,
1918 parse_interface(argv[optind-1],
1920 fw.ipv6.outiface_mask);
1921 fw.nfcache |= NFC_IP6_IF_OUT;
1926 set_option(&options, OPT_VERBOSE,
1927 &fw.ipv6.invflags, invert);
1935 exit_error(PARAMETER_PROBLEM,
1936 "unexpected ! flag before --match");
1938 m = find_match(optarg, LOAD_MUST_SUCCEED);
1939 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
1941 m->m = fw_calloc(1, size);
1942 m->m->u.match_size = size;
1943 strcpy(m->m->u.user.name, m->name);
1944 m->init(m->m, &fw.nfcache);
1945 opts = merge_options(opts, m->extra_opts, &m->option_offset);
1950 set_option(&options, OPT_NUMERIC, &fw.ipv6.invflags,
1956 exit_error(PARAMETER_PROBLEM,
1957 "unexpected ! flag before --table");
1958 *table = argv[optind-1];
1962 set_option(&options, OPT_EXPANDED, &fw.ipv6.invflags,
1968 printf("Not %s ;-)\n", program_version);
1971 program_name, program_version);
1975 set_option(&options, OPT_LINENUMBERS, &fw.ipv6.invflags,
1985 set_option(&options, OPT_COUNTERS, &fw.ipv6.invflags,
1988 if (optind < argc && argv[optind][0] != '-'
1989 && argv[optind][0] != '!')
1990 bcnt = argv[optind++];
1992 exit_error(PARAMETER_PROBLEM,
1993 "-%c requires packet and byte counter",
1994 opt2char(OPT_COUNTERS));
1996 if (sscanf(pcnt, "%llu", &fw.counters.pcnt) != 1)
1997 exit_error(PARAMETER_PROBLEM,
1998 "-%c packet counter not numeric",
1999 opt2char(OPT_COUNTERS));
2001 if (sscanf(bcnt, "%llu", &fw.counters.bcnt) != 1)
2002 exit_error(PARAMETER_PROBLEM,
2003 "-%c byte counter not numeric",
2004 opt2char(OPT_COUNTERS));
2009 case 1: /* non option */
2010 if (optarg[0] == '!' && optarg[1] == '\0') {
2012 exit_error(PARAMETER_PROBLEM,
2013 "multiple consecutive ! not"
2019 printf("Bad argument `%s'\n", optarg);
2023 /* FIXME: This scheme doesn't allow two of the same
2026 || !(target->parse(c - target->option_offset,
2029 &fw, &target->t))) {
2030 for (m = ip6tables_matches; m; m = m->next) {
2034 if (m->parse(c - m->option_offset,
2043 /* If you listen carefully, you can
2044 actually hear this code suck. */
2046 /* some explanations (after four different bugs
2047 * in 3 different releases): If we encountere a
2048 * parameter, that has not been parsed yet,
2049 * it's not an option of an explicitly loaded
2050 * match or a target. However, we support
2051 * implicit loading of the protocol match
2052 * extension. '-p tcp' means 'l4 proto 6' and
2053 * at the same time 'load tcp protocol match on
2054 * demand if we specify --dport'.
2056 * To make this work, we need to make sure:
2057 * - the parameter has not been parsed by
2059 * - a protocol has been specified
2060 * - the protocol extension has not been
2061 * loaded yet, or is loaded and unused
2062 * [think of iptables-restore!]
2063 * - the protocol extension can be successively
2068 && (!find_proto(protocol, DONT_LOAD,
2069 options&OPT_NUMERIC)
2070 || (find_proto(protocol, DONT_LOAD,
2071 options&OPT_NUMERIC)
2072 && (proto_used == 0))
2074 && (m = find_proto(protocol, TRY_LOAD,
2075 options&OPT_NUMERIC))) {
2076 /* Try loading protocol */
2081 size = IP6T_ALIGN(sizeof(struct ip6t_entry_match))
2084 m->m = fw_calloc(1, size);
2085 m->m->u.match_size = size;
2086 strcpy(m->m->u.user.name, m->name);
2087 m->init(m->m, &fw.nfcache);
2089 opts = merge_options(opts,
2090 m->extra_opts, &m->option_offset);
2097 exit_error(PARAMETER_PROBLEM,
2105 for (m = ip6tables_matches; m; m = m->next) {
2109 m->final_check(m->mflags);
2113 target->final_check(target->tflags);
2115 /* Fix me: must put inverse options checking here --MN */
2118 exit_error(PARAMETER_PROBLEM,
2119 "unknown arguments found on commandline");
2121 exit_error(PARAMETER_PROBLEM, "no command specified");
2123 exit_error(PARAMETER_PROBLEM,
2124 "nothing appropriate following !");
2126 if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND)) {
2127 if (!(options & OPT_DESTINATION))
2128 dhostnetworkmask = "::0/0";
2129 if (!(options & OPT_SOURCE))
2130 shostnetworkmask = "::0/0";
2133 if (shostnetworkmask)
2134 parse_hostnetworkmask(shostnetworkmask, &saddrs,
2135 &(fw.ipv6.smsk), &nsaddrs);
2137 if (dhostnetworkmask)
2138 parse_hostnetworkmask(dhostnetworkmask, &daddrs,
2139 &(fw.ipv6.dmsk), &ndaddrs);
2141 if ((nsaddrs > 1 || ndaddrs > 1) &&
2142 (fw.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
2143 exit_error(PARAMETER_PROBLEM, "! not allowed with multiple"
2144 " source or destination IP addresses");
2146 if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
2147 exit_error(PARAMETER_PROBLEM, "Replacement rule does not "
2148 "specify a unique address");
2150 generic_opt_check(command, options);
2152 if (chain && strlen(chain) > IP6T_FUNCTION_MAXNAMELEN)
2153 exit_error(PARAMETER_PROBLEM,
2154 "chain name `%s' too long (must be under %i chars)",
2155 chain, IP6T_FUNCTION_MAXNAMELEN);
2157 /* only allocate handle if we weren't called with a handle */
2159 *handle = ip6tc_init(*table);
2162 /* try to insmod the module if iptc_init failed */
2163 ip6tables_insmod("ip6_tables", modprobe);
2164 *handle = ip6tc_init(*table);
2168 exit_error(VERSION_PROBLEM,
2169 "can't initialize ip6tables table `%s': %s",
2170 *table, ip6tc_strerror(errno));
2172 if (command == CMD_APPEND
2173 || command == CMD_DELETE
2174 || command == CMD_INSERT
2175 || command == CMD_REPLACE) {
2176 if (strcmp(chain, "PREROUTING") == 0
2177 || strcmp(chain, "INPUT") == 0) {
2178 /* -o not valid with incoming packets. */
2179 if (options & OPT_VIANAMEOUT)
2180 exit_error(PARAMETER_PROBLEM,
2181 "Can't use -%c with %s\n",
2182 opt2char(OPT_VIANAMEOUT),
2186 if (strcmp(chain, "POSTROUTING") == 0
2187 || strcmp(chain, "OUTPUT") == 0) {
2188 /* -i not valid with outgoing packets */
2189 if (options & OPT_VIANAMEIN)
2190 exit_error(PARAMETER_PROBLEM,
2191 "Can't use -%c with %s\n",
2192 opt2char(OPT_VIANAMEIN),
2196 if (target && ip6tc_is_chain(jumpto, *handle)) {
2197 printf("Warning: using chain %s, not extension\n",
2203 /* If they didn't specify a target, or it's a chain
2204 name, use standard. */
2206 && (strlen(jumpto) == 0
2207 || ip6tc_is_chain(jumpto, *handle))) {
2210 target = find_target(IP6T_STANDARD_TARGET,
2213 size = sizeof(struct ip6t_entry_target)
2215 target->t = fw_calloc(1, size);
2216 target->t->u.target_size = size;
2217 strcpy(target->t->u.user.name, jumpto);
2218 target->init(target->t, &fw.nfcache);
2222 /* it is no chain, and we can't load a plugin.
2223 * We cannot know if the plugin is corrupt, non
2224 * existant OR if the user just misspelled a
2226 find_target(jumpto, LOAD_MUST_SUCCEED);
2228 e = generate_entry(&fw, ip6tables_matches, target->t);
2234 ret = append_entry(chain, e,
2235 nsaddrs, saddrs, ndaddrs, daddrs,
2236 options&OPT_VERBOSE,
2240 ret = delete_entry(chain, e,
2241 nsaddrs, saddrs, ndaddrs, daddrs,
2242 options&OPT_VERBOSE,
2245 case CMD_DELETE_NUM:
2246 ret = ip6tc_delete_num_entry(chain, rulenum - 1, handle);
2249 ret = replace_entry(chain, e, rulenum - 1,
2250 saddrs, daddrs, options&OPT_VERBOSE,
2254 ret = insert_entry(chain, e, rulenum - 1,
2255 nsaddrs, saddrs, ndaddrs, daddrs,
2256 options&OPT_VERBOSE,
2260 ret = list_entries(chain,
2261 options&OPT_VERBOSE,
2262 options&OPT_NUMERIC,
2263 options&OPT_EXPANDED,
2264 options&OPT_LINENUMBERS,
2268 ret = flush_entries(chain, options&OPT_VERBOSE, handle);
2271 ret = zero_entries(chain, options&OPT_VERBOSE, handle);
2273 case CMD_LIST|CMD_ZERO:
2274 ret = list_entries(chain,
2275 options&OPT_VERBOSE,
2276 options&OPT_NUMERIC,
2277 options&OPT_EXPANDED,
2278 options&OPT_LINENUMBERS,
2281 ret = zero_entries(chain,
2282 options&OPT_VERBOSE, handle);
2285 ret = ip6tc_create_chain(chain, handle);
2287 case CMD_DELETE_CHAIN:
2288 ret = delete_chain(chain, options&OPT_VERBOSE, handle);
2290 case CMD_RENAME_CHAIN:
2291 ret = ip6tc_rename_chain(chain, newname, handle);
2293 case CMD_SET_POLICY:
2294 ret = ip6tc_set_policy(chain, policy, NULL, handle);
2297 /* We should never reach this... */
2302 dump_entries6(*handle);