xtables.c revision 87dc7c4c842deb1e2e3d38089ffcad9f238d98de
15208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI/* 25208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * (C) 2000-2006 by the netfilter coreteam <coreteam@netfilter.org>: 35208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * 45208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * This program is free software; you can redistribute it and/or modify 55208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * it under the terms of the GNU General Public License as published by 65208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * the Free Software Foundation; either version 2 of the License, or 75208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * (at your option) any later version. 85208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * 95208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * This program is distributed in the hope that it will be useful, 105208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * but WITHOUT ANY WARRANTY; without even the implied warranty of 115208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 125208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * GNU General Public License for more details. 135208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * 145208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * You should have received a copy of the GNU General Public License 155208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * along with this program; if not, write to the Free Software 165208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 175208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI */ 185208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI 193dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI#include <errno.h> 200b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <fcntl.h> 2104f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI#include <netdb.h> 22aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt#include <stdarg.h> 23cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt#include <stdbool.h> 243dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI#include <stdio.h> 253dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI#include <stdlib.h> 260b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <string.h> 270b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <unistd.h> 280d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#include <sys/socket.h> 290b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <sys/stat.h> 300b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <sys/types.h> 310b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#include <sys/wait.h> 3208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt#include <arpa/inet.h> 333dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 345208806f2708f761e97e62550561e3164b541770Yasuyuki KOZAKAI#include <xtables.h> 354e41854423b529d3107c23b85434d50a75d08057Jan Engelhardt#include <limits.h> /* INT_MAX in ip_tables.h/ip6_tables.h */ 3677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt#include <linux/netfilter_ipv4/ip_tables.h> 3777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt#include <linux/netfilter_ipv6/ip6_tables.h> 38ef18e8147903885708d1c264904129af4fb636d6Jan Engelhardt#include <libiptc/libxtc.h> 393dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 405a26b5fd7bf11ca93d54fe7dc24b3423fb7d89b2Mike Frysinger#ifndef NO_SHARED_LIBS 415a26b5fd7bf11ca93d54fe7dc24b3423fb7d89b2Mike Frysinger#include <dlfcn.h> 425a26b5fd7bf11ca93d54fe7dc24b3423fb7d89b2Mike Frysinger#endif 43c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt#ifndef IPT_SO_GET_REVISION_MATCH /* Old kernel source. */ 44c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt# define IPT_SO_GET_REVISION_MATCH (IPT_BASE_CTL + 2) 45c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt# define IPT_SO_GET_REVISION_TARGET (IPT_BASE_CTL + 3) 46c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt#endif 47c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt#ifndef IP6T_SO_GET_REVISION_MATCH /* Old kernel source. */ 48c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt# define IP6T_SO_GET_REVISION_MATCH 68 49c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt# define IP6T_SO_GET_REVISION_TARGET 69 50c31870f9bebb3d4d082016fcfaf8c2177ae32eb2Jan Engelhardt#endif 5170581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim#include <getopt.h> 521e128bd804b676ee91beca48312de9b251845d09Jan Engelhardt#include "xshared.h" 535a26b5fd7bf11ca93d54fe7dc24b3423fb7d89b2Mike Frysinger 540d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#define NPROTO 255 550d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 560b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#ifndef PROC_SYS_MODPROBE 570b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe" 580b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#endif 590b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 608b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salimvoid basic_exit_err(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); 618b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim 6240a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salimstruct xtables_globals *xt_params = NULL; 6340a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim 648b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salimvoid basic_exit_err(enum xtables_exittype status, const char *msg, ...) 6540a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim{ 6640a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim va_list args; 6740a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim 6840a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim va_start(args, msg); 6940a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim fprintf(stderr, "%s v%s: ", xt_params->program_name, xt_params->program_version); 7040a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim vfprintf(stderr, msg, args); 7140a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim va_end(args); 7240a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim fprintf(stderr, "\n"); 7340a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim exit(status); 7440a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim} 7540a8343d3ad0cdbc3a7e69c8d970ad75807c29edJamal Hadi Salim 76600f38db82548a683775fd89b6e136673e924097Jan Engelhardtvoid xtables_free_opts(int unused) 7784c3055bf08d0a8fe5db6e5f3f96dd826a290147Jamal Hadi Salim{ 78df288236cd254798be3759fef4cbc3e535f5a1c3Jan Engelhardt if (xt_params->opts != xt_params->orig_opts) { 7959e8114c6792242e80785f4461d5e663fb9a3d64Jan Engelhardt free(xt_params->opts); 80df288236cd254798be3759fef4cbc3e535f5a1c3Jan Engelhardt xt_params->opts = NULL; 81df288236cd254798be3759fef4cbc3e535f5a1c3Jan Engelhardt } 8284c3055bf08d0a8fe5db6e5f3f96dd826a290147Jamal Hadi Salim} 8384c3055bf08d0a8fe5db6e5f3f96dd826a290147Jamal Hadi Salim 84600f38db82548a683775fd89b6e136673e924097Jan Engelhardtstruct option *xtables_merge_options(struct option *orig_opts, 85600f38db82548a683775fd89b6e136673e924097Jan Engelhardt struct option *oldopts, 8670581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim const struct option *newopts, 8770581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim unsigned int *option_offset) 8870581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim{ 89600f38db82548a683775fd89b6e136673e924097Jan Engelhardt unsigned int num_oold = 0, num_old = 0, num_new = 0, i; 90600f38db82548a683775fd89b6e136673e924097Jan Engelhardt struct option *merge, *mp; 9170581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 9270581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim if (newopts == NULL) 9370581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim return oldopts; 9470581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 95600f38db82548a683775fd89b6e136673e924097Jan Engelhardt for (num_oold = 0; orig_opts[num_oold].name; num_oold++) ; 96600f38db82548a683775fd89b6e136673e924097Jan Engelhardt if (oldopts != NULL) 97600f38db82548a683775fd89b6e136673e924097Jan Engelhardt for (num_old = 0; oldopts[num_old].name; num_old++) ; 9870581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim for (num_new = 0; newopts[num_new].name; num_new++) ; 9970581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 1001dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt /* 1011dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt * Since @oldopts also has @orig_opts already (and does so at the 1021dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt * start), skip these entries. 1031dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt */ 1041dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt oldopts += num_oold; 1051dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt num_old -= num_oold; 1061dc27393b7ba401e6228a5ee2472a6eb72836c43Jan Engelhardt 107600f38db82548a683775fd89b6e136673e924097Jan Engelhardt merge = malloc(sizeof(*mp) * (num_oold + num_old + num_new + 1)); 108600f38db82548a683775fd89b6e136673e924097Jan Engelhardt if (merge == NULL) 109600f38db82548a683775fd89b6e136673e924097Jan Engelhardt return NULL; 110600f38db82548a683775fd89b6e136673e924097Jan Engelhardt 111600f38db82548a683775fd89b6e136673e924097Jan Engelhardt /* Let the base options -[ADI...] have precedence over everything */ 112600f38db82548a683775fd89b6e136673e924097Jan Engelhardt memcpy(merge, orig_opts, sizeof(*mp) * num_oold); 113600f38db82548a683775fd89b6e136673e924097Jan Engelhardt mp = merge + num_oold; 114600f38db82548a683775fd89b6e136673e924097Jan Engelhardt 115600f38db82548a683775fd89b6e136673e924097Jan Engelhardt /* Second, the new options */ 1161e128bd804b676ee91beca48312de9b251845d09Jan Engelhardt xt_params->option_offset += XT_OPTION_OFFSET_SCALE; 11770581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim *option_offset = xt_params->option_offset; 118600f38db82548a683775fd89b6e136673e924097Jan Engelhardt memcpy(mp, newopts, sizeof(*mp) * num_new); 11970581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 120600f38db82548a683775fd89b6e136673e924097Jan Engelhardt for (i = 0; i < num_new; ++i, ++mp) 121600f38db82548a683775fd89b6e136673e924097Jan Engelhardt mp->val += *option_offset; 122600f38db82548a683775fd89b6e136673e924097Jan Engelhardt 123600f38db82548a683775fd89b6e136673e924097Jan Engelhardt /* Third, the old options */ 124600f38db82548a683775fd89b6e136673e924097Jan Engelhardt memcpy(mp, oldopts, sizeof(*mp) * num_old); 125600f38db82548a683775fd89b6e136673e924097Jan Engelhardt mp += num_old; 126600f38db82548a683775fd89b6e136673e924097Jan Engelhardt xtables_free_opts(0); 12770581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 128600f38db82548a683775fd89b6e136673e924097Jan Engelhardt /* Clear trailing entry */ 129600f38db82548a683775fd89b6e136673e924097Jan Engelhardt memset(mp, 0, sizeof(*mp)); 13070581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim return merge; 13170581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim} 13270581922f873a88306dd5b1cb83c5081ee239eb8Jamal Hadi Salim 133dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt/** 13477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * xtables_afinfo - protocol family dependent information 13577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @kmod: kernel module basename (e.g. "ip_tables") 13677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @libprefix: prefix of .so library name (e.g. "libipt_") 13777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @family: nfproto family 13877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @ipproto: used by setsockopt (e.g. IPPROTO_IP) 13977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @so_rev_match: optname to check revision support of match 14077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt * @so_rev_target: optname to check revision support of target 14177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt */ 14277f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardtstruct xtables_afinfo { 14377f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt const char *kmod; 14477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt const char *libprefix; 14577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt uint8_t family; 14677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt uint8_t ipproto; 14777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt int so_rev_match; 14877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt int so_rev_target; 14977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt}; 15077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt 15177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardtstatic const struct xtables_afinfo afinfo_ipv4 = { 15277f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .kmod = "ip_tables", 15377f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .libprefix = "libipt_", 15477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .family = NFPROTO_IPV4, 15577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .ipproto = IPPROTO_IP, 15677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .so_rev_match = IPT_SO_GET_REVISION_MATCH, 15777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .so_rev_target = IPT_SO_GET_REVISION_TARGET, 15877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt}; 15977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt 16077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardtstatic const struct xtables_afinfo afinfo_ipv6 = { 16177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .kmod = "ip6_tables", 16277f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .libprefix = "libip6t_", 16377f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .family = NFPROTO_IPV6, 16477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .ipproto = IPPROTO_IPV6, 16577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .so_rev_match = IP6T_SO_GET_REVISION_MATCH, 16677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt .so_rev_target = IP6T_SO_GET_REVISION_TARGET, 16777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt}; 16877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt 16977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardtstatic const struct xtables_afinfo *afinfo; 17077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt 17139bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt/* Search path for Xtables .so files */ 17239bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardtstatic const char *xtables_libdir; 1730d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 1740b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI/* the path to command to load kernel module */ 175c021c3ce7b1583eb5dd71b10ac3d8ab3cd36beaaJan Engelhardtconst char *xtables_modprobe_program; 1760b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 1770d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI/* Keeping track of external matches and targets: linked lists. */ 1780d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAIstruct xtables_match *xtables_matches; 1790d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAIstruct xtables_target *xtables_targets; 1800d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 18139bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardtvoid xtables_init(void) 18239bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt{ 18339bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt xtables_libdir = getenv("XTABLES_LIBDIR"); 18439bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt if (xtables_libdir != NULL) 18539bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt return; 18639bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt xtables_libdir = getenv("IPTABLES_LIB_DIR"); 18739bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt if (xtables_libdir != NULL) { 18839bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt fprintf(stderr, "IPTABLES_LIB_DIR is deprecated, " 18939bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt "use XTABLES_LIBDIR.\n"); 19039bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt return; 19139bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt } 192ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt /* 193ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt * Well yes, IP6TABLES_LIB_DIR is of lower priority over 194ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt * IPTABLES_LIB_DIR since this moved to libxtables; I think that is ok 195ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt * for these env vars are deprecated anyhow, and in light of the 196ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt * (shared) libxt_*.so files, makes less sense to have 197ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt * IPTABLES_LIB_DIR != IP6TABLES_LIB_DIR. 198ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt */ 199ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt xtables_libdir = getenv("IP6TABLES_LIB_DIR"); 200ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt if (xtables_libdir != NULL) { 201ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt fprintf(stderr, "IP6TABLES_LIB_DIR is deprecated, " 202ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt "use XTABLES_LIBDIR.\n"); 203ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt return; 204ec934198bd6ee2f21171dba440ca96334b0d874bJan Engelhardt } 20539bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt xtables_libdir = XTABLES_LIBDIR; 20639bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt} 20739bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt 20877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardtvoid xtables_set_nfproto(uint8_t nfproto) 20977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt{ 21077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt switch (nfproto) { 21177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt case NFPROTO_IPV4: 21277f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt afinfo = &afinfo_ipv4; 21377f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt break; 21477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt case NFPROTO_IPV6: 21577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt afinfo = &afinfo_ipv6; 21677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt break; 21777f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt default: 21877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt fprintf(stderr, "libxtables: unhandled NFPROTO in %s\n", 21977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt __func__); 22077f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt } 22177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt} 22277f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt 223630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt/** 2247e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * xtables_set_params - set the global parameters used by xtables 2257e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * @xtp: input xtables_globals structure 2267e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * 2277e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * The app is expected to pass a valid xtables_globals data-filled 2287e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * with proper values 2297e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * @xtp cannot be NULL 2307e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * 2317e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim * Returns -1 on failure to set and 0 on success 2327e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim */ 2337e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salimint xtables_set_params(struct xtables_globals *xtp) 2347e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim{ 2357e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim if (!xtp) { 2367e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim fprintf(stderr, "%s: Illegal global params\n",__func__); 2377e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim return -1; 2387e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim } 2397e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim 2407e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim xt_params = xtp; 2417e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim 2427e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim if (!xt_params->exit_err) 2437e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim xt_params->exit_err = basic_exit_err; 2447e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim 2457e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim return 0; 2467e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim} 2477e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim 2487e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salimint xtables_init_all(struct xtables_globals *xtp, uint8_t nfproto) 2497e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim{ 2507e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim xtables_init(); 2517e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim xtables_set_nfproto(nfproto); 2527e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim return xtables_set_params(xtp); 2537e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim} 2547e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim 2557e4db2f50133007f549f222468bde4f3adcf41acJamal Hadi Salim/** 256630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt * xtables_*alloc - wrappers that exit on failure 257630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt */ 258630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardtvoid *xtables_calloc(size_t count, size_t size) 2593dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI{ 2603dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI void *p; 2613dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 2623dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI if ((p = calloc(count, size)) == NULL) { 2633dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI perror("ip[6]tables: calloc failed"); 2643dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI exit(1); 2653dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI } 2663dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 2673dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI return p; 2683dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI} 2693dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 270630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardtvoid *xtables_malloc(size_t size) 2713dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI{ 2723dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI void *p; 2733dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 2743dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI if ((p = malloc(size)) == NULL) { 2753dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI perror("ip[6]tables: malloc failed"); 2763dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI exit(1); 2773dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI } 2783dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI 2793dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI return p; 2803dfa4488b032fc32aaf2470f48ac1fc3a534794fYasuyuki KOZAKAI} 2810b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 282332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzowvoid *xtables_realloc(void *ptr, size_t size) 283332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow{ 284332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow void *p; 285332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 286332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if ((p = realloc(ptr, size)) == NULL) { 287332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow perror("ip[6]tables: realloc failed"); 288332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow exit(1); 289332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 290332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 291332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow return p; 292332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow} 293332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 2940b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAIstatic char *get_modprobe(void) 2950b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI{ 2960b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI int procfile; 2970b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI char *ret; 2980b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 2990b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI#define PROCFILE_BUFSIZ 1024 3000b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI procfile = open(PROC_SYS_MODPROBE, O_RDONLY); 3010b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (procfile < 0) 3020b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return NULL; 3030b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 304371cea299f0b2eb100b9fc9fb99089640d2d606fJan Engelhardt ret = malloc(PROCFILE_BUFSIZ); 3050b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (ret) { 3060b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI memset(ret, 0, PROCFILE_BUFSIZ); 3070b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI switch (read(procfile, ret, PROCFILE_BUFSIZ)) { 3080b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI case -1: goto fail; 3090b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI case PROCFILE_BUFSIZ: goto fail; /* Partial read. Wierd */ 3100b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } 3110b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (ret[strlen(ret)-1]=='\n') 3120b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI ret[strlen(ret)-1]=0; 3130b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI close(procfile); 3140b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return ret; 3150b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } 3160b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI fail: 3170b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI free(ret); 3180b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI close(procfile); 3190b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return NULL; 3200b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI} 3210b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 322c021c3ce7b1583eb5dd71b10ac3d8ab3cd36beaaJan Engelhardtint xtables_insmod(const char *modname, const char *modprobe, bool quiet) 3230b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI{ 3240b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI char *buf = NULL; 3250b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI char *argv[4]; 3260b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI int status; 3270b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 3280b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI /* If they don't explicitly set it, read out of kernel */ 3290b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (!modprobe) { 3300b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI buf = get_modprobe(); 3310b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (!buf) 3320b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return -1; 3330b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI modprobe = buf; 3340b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } 3350b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 336c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt /* 337c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt * Need to flush the buffer, or the child may output it again 338c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt * when switching the program thru execv. 339c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt */ 340c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt fflush(stdout); 341c19f880d8aac7c0372381e29d7cea09accd0db26Jan Engelhardt 34294aa2ea67d7b8a669e8541f094661a1dc89722a3Jan Engelhardt switch (vfork()) { 3430b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI case 0: 3440b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[0] = (char *)modprobe; 3450b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[1] = (char *)modname; 3460b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (quiet) { 3470b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[2] = "-q"; 3480b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[3] = NULL; 3490b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } else { 3500b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[2] = NULL; 3510b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI argv[3] = NULL; 3520b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } 3530b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI execv(argv[0], argv); 3540b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 3550b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI /* not usually reached */ 3560b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI exit(1); 3570b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI case -1: 3580b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return -1; 3590b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 3600b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI default: /* parent */ 3610b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI wait(&status); 3620b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI } 3630b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 3640b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI free(buf); 3650b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI if (WIFEXITED(status) && WEXITSTATUS(status) == 0) 3660b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return 0; 3670b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI return -1; 3680b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI} 3690b82e8e81e887843011c8771f70d2302901f7e5eYasuyuki KOZAKAI 370c021c3ce7b1583eb5dd71b10ac3d8ab3cd36beaaJan Engelhardtint xtables_load_ko(const char *modprobe, bool quiet) 3710d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 372c021c3ce7b1583eb5dd71b10ac3d8ab3cd36beaaJan Engelhardt static bool loaded = false; 3730d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI static int ret = -1; 3740d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 3750d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (!loaded) { 37677f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt ret = xtables_insmod(afinfo->kmod, modprobe, quiet); 3770d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI loaded = (ret == 0); 3780d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 3790d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 3800d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return ret; 3810d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 3820d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 3835f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt/** 3845f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * xtables_strtou{i,l} - string to number conversion 3855f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * @s: input string 3865f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * @end: like strtoul's "end" pointer 3875f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * @value: pointer for result 3885f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * @min: minimum accepted value 3895f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * @max: maximum accepted value 3905f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * 3915f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * If @end is NULL, we assume the caller wants a "strict strtoul", and hence 3925f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * "15a" is rejected. 3935f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * In either case, the value obtained is compared for min-max compliance. 3945f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * Base is always 0, i.e. autodetect depending on @s. 395cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt * 3965f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * Returns true/false whether number was accepted. On failure, *value has 3975f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt * undefined contents. 398cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt */ 3995f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardtbool xtables_strtoul(const char *s, char **end, unsigned long *value, 4005f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt unsigned long min, unsigned long max) 401cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt{ 402cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt unsigned long v; 403cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt char *my_end; 404cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 405cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt errno = 0; 406cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt v = strtoul(s, &my_end, 0); 407cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 408cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (my_end == s) 409cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt return false; 410cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (end != NULL) 411cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt *end = my_end; 412cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 413cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (errno != ERANGE && min <= v && (max == 0 || v <= max)) { 414cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (value != NULL) 415cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt *value = v; 416cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (end == NULL) 417cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt return *my_end == '\0'; 418cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt return true; 419cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt } 420cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 421cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt return false; 422cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt} 423cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 4245f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardtbool xtables_strtoui(const char *s, char **end, unsigned int *value, 4255f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt unsigned int min, unsigned int max) 426cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt{ 427cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt unsigned long v; 428cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt bool ret; 429cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 4305f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt ret = xtables_strtoul(s, end, &v, min, max); 431cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt if (value != NULL) 432cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt *value = v; 433cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt return ret; 434cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt} 435cd9e7aa106e80c44bd526af74b616701b0772d05Jan Engelhardt 436aae6be9edc99e58164a3592c510fe5488141c698Jan Engelhardtint xtables_service_to_port(const char *name, const char *proto) 43704f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI{ 43804f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI struct servent *service; 43904f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 44004f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI if ((service = getservbyname(name, proto)) != NULL) 44104f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI return ntohs((unsigned short) service->s_port); 44204f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 44304f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI return -1; 44404f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI} 44504f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 4467ac405297ec38449b30e3b05fd6bf2082fd3d803Jan Engelhardtuint16_t xtables_parse_port(const char *port, const char *proto) 44704f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI{ 4487a236f4cc685a420c1a782a5db614a93baf37ccfJan Engelhardt unsigned int portnum; 44904f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 4505f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (xtables_strtoui(port, NULL, &portnum, 0, UINT16_MAX) || 451aae6be9edc99e58164a3592c510fe5488141c698Jan Engelhardt (portnum = xtables_service_to_port(port, proto)) != (unsigned)-1) 452213e185afbb298e6708881e4c2adffdc47a8b6daJan Engelhardt return portnum; 45304f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 4548b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 45504f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI "invalid port/service `%s' specified", port); 45604f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI} 45704f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 458aae6be9edc99e58164a3592c510fe5488141c698Jan Engelhardtvoid xtables_parse_interface(const char *arg, char *vianame, 459aae6be9edc99e58164a3592c510fe5488141c698Jan Engelhardt unsigned char *mask) 46004f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI{ 461fcf5723f415c81fcb2c93094cdcc39b35a316ff2Jan Engelhardt unsigned int vialen = strlen(arg); 46204f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI unsigned int i; 46304f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 46404f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask, 0, IFNAMSIZ); 46504f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(vianame, 0, IFNAMSIZ); 46604f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 46704f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI if (vialen + 1 > IFNAMSIZ) 4688b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 46904f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI "interface name `%s' must be shorter than IFNAMSIZ" 47004f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI " (%i)", arg, IFNAMSIZ-1); 47104f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 47204f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI strcpy(vianame, arg); 473fcf5723f415c81fcb2c93094cdcc39b35a316ff2Jan Engelhardt if (vialen == 0) 47404f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask, 0, IFNAMSIZ); 47504f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI else if (vianame[vialen - 1] == '+') { 47604f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask, 0xFF, vialen - 1); 47704f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1); 47804f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI /* Don't remove `+' here! -HW */ 47904f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI } else { 48004f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI /* Include nul-terminator in match */ 48104f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask, 0xFF, vialen + 1); 48204f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1); 48304f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI for (i = 0; vianame[i]; i++) { 484fcf5723f415c81fcb2c93094cdcc39b35a316ff2Jan Engelhardt if (vianame[i] == '/' || 485fcf5723f415c81fcb2c93094cdcc39b35a316ff2Jan Engelhardt vianame[i] == ' ') { 486aae4f82eb83d923f59a328d6e13396f424be28f9Max Kellermann fprintf(stderr, 487aae4f82eb83d923f59a328d6e13396f424be28f9Max Kellermann "Warning: weird character in interface" 488fcf5723f415c81fcb2c93094cdcc39b35a316ff2Jan Engelhardt " `%s' ('/' and ' ' are not allowed by the kernel).\n", 489aae4f82eb83d923f59a328d6e13396f424be28f9Max Kellermann vianame); 49004f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI break; 49104f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI } 49204f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI } 49304f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI } 49404f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI} 49504f8c54dc52e19096d31d94593bd1040716afe4dYasuyuki KOZAKAI 496cb25af809a8734c4766b6bfa4cca99596cbf01dbJan Engelhardt#ifndef NO_SHARED_LIBS 497927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardtstatic void *load_extension(const char *search_path, const char *af_prefix, 49821b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt const char *name, bool is_target) 49921b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt{ 500927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt const char *all_prefixes[] = {"libxt_", af_prefix, NULL}; 501927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt const char **prefix; 50221b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt const char *dir = search_path, *next; 50321b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt void *ptr = NULL; 50421b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt struct stat sb; 50521b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt char path[256]; 50621b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 50721b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt do { 50821b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt next = strchr(dir, ':'); 50921b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt if (next == NULL) 51021b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt next = dir + strlen(dir); 51121b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 512927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt for (prefix = all_prefixes; *prefix != NULL; ++prefix) { 513927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt snprintf(path, sizeof(path), "%.*s/%s%s.so", 514927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt (unsigned int)(next - dir), dir, 515927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt *prefix, name); 516927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt 517927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt if (stat(path, &sb) != 0) { 518927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt if (errno == ENOENT) 519927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt continue; 520927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt fprintf(stderr, "%s: %s\n", path, 521927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt strerror(errno)); 522927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt return NULL; 523927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt } 524927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt if (dlopen(path, RTLD_NOW) == NULL) { 525927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt fprintf(stderr, "%s: %s\n", path, dlerror()); 526927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt break; 527927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt } 52821b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 52921b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt if (is_target) 5302338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt ptr = xtables_find_target(name, XTF_DONT_LOAD); 53121b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt else 5322338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt ptr = xtables_find_match(name, 5332338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt XTF_DONT_LOAD, NULL); 53421b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 535927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt if (ptr != NULL) 536927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt return ptr; 53721b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 538927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt fprintf(stderr, "%s: no \"%s\" extension found for " 539927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt "this protocol\n", path, name); 540927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt errno = ENOENT; 541927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt return NULL; 542927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt } 54321b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt dir = next + 1; 54421b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt } while (*next != '\0'); 54521b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 54621b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt return NULL; 54721b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt} 548cb25af809a8734c4766b6bfa4cca99596cbf01dbJan Engelhardt#endif 54921b41eea4724c57d2b6e5998cf38255046e43ad3Jan Engelhardt 5502338efd8f799d8373dc196c797bda9690283b698Jan Engelhardtstruct xtables_match * 5512338efd8f799d8373dc196c797bda9690283b698Jan Engelhardtxtables_find_match(const char *name, enum xtables_tryload tryload, 5522338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt struct xtables_rule_match **matches) 5530d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 5540d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_match *ptr; 5550d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI const char *icmp6 = "icmp6"; 5560d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5570cb675b8f18c4b074d4c69461638820708e98100Jan Engelhardt if (strlen(name) >= XT_EXTENSION_MAXNAMELEN) 55821d1283750d9c4df7ca80165d2b9dc0b9bd214ebJan Engelhardt xtables_error(PARAMETER_PROBLEM, 55921d1283750d9c4df7ca80165d2b9dc0b9bd214ebJan Engelhardt "Invalid match name \"%s\" (%u chars max)", 5600cb675b8f18c4b074d4c69461638820708e98100Jan Engelhardt name, XT_EXTENSION_MAXNAMELEN - 1); 56121d1283750d9c4df7ca80165d2b9dc0b9bd214ebJan Engelhardt 5620d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* This is ugly as hell. Nonetheless, there is no way of changing 5630d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI * this without hurting backwards compatibility */ 5640d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if ( (strcmp(name,"icmpv6") == 0) || 5650d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI (strcmp(name,"ipv6-icmp") == 0) || 5660d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI (strcmp(name,"icmp6") == 0) ) 5670d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI name = icmp6; 5680d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5690d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (ptr = xtables_matches; ptr; ptr = ptr->next) { 5700d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (strcmp(name, ptr->name) == 0) { 5710d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_match *clone; 5720d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5730d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* First match of this type: */ 5740d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (ptr->m == NULL) 5750d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI break; 5760d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5770d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Second and subsequent clones */ 578630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt clone = xtables_malloc(sizeof(struct xtables_match)); 5790d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI memcpy(clone, ptr, sizeof(struct xtables_match)); 5800d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI clone->mflags = 0; 5810d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* This is a clone: */ 5820d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI clone->next = clone; 5830d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5840d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr = clone; 5850d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI break; 5860d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 5870d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 5880d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 5890d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#ifndef NO_SHARED_LIBS 5902338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (!ptr && tryload != XTF_DONT_LOAD && tryload != XTF_DURING_LOAD) { 59177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt ptr = load_extension(xtables_libdir, afinfo->libprefix, 59239bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt name, false); 593170af8c566faa9605c1ead558792a031f1d0d48dYasuyuki KOZAKAI 5942338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (ptr == NULL && tryload == XTF_LOAD_MUST_SUCCEED) 5958b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 5960d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "Couldn't load match `%s':%s\n", 597927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt name, strerror(errno)); 5980d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 5990d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#else 6000d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (ptr && !ptr->loaded) { 6012338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (tryload != XTF_DONT_LOAD) 6020d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr->loaded = 1; 6030d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI else 6040d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr = NULL; 6050d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6062338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if(!ptr && (tryload == XTF_LOAD_MUST_SUCCEED)) { 6078b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 6080d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "Couldn't find match `%s'\n", name); 6090d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6100d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#endif 6110d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6120d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (ptr && matches) { 6130d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_rule_match **i; 6140d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_rule_match *newentry; 6150d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 616630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt newentry = xtables_malloc(sizeof(struct xtables_rule_match)); 6170d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6180d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (i = matches; *i; i = &(*i)->next) { 6190d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (strcmp(name, (*i)->match->name) == 0) 6202338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt (*i)->completed = true; 6210d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6220d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI newentry->match = ptr; 6232338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt newentry->completed = false; 6240d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI newentry->next = NULL; 6250d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI *i = newentry; 6260d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6270d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6280d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return ptr; 6290d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 6300d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6312338efd8f799d8373dc196c797bda9690283b698Jan Engelhardtstruct xtables_target * 6322338efd8f799d8373dc196c797bda9690283b698Jan Engelhardtxtables_find_target(const char *name, enum xtables_tryload tryload) 6330d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 6340d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_target *ptr; 6350d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6360d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Standard target? */ 6370d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (strcmp(name, "") == 0 6380d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI || strcmp(name, XTC_LABEL_ACCEPT) == 0 6390d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI || strcmp(name, XTC_LABEL_DROP) == 0 6400d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI || strcmp(name, XTC_LABEL_QUEUE) == 0 6410d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI || strcmp(name, XTC_LABEL_RETURN) == 0) 6420d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI name = "standard"; 6430d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6440d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (ptr = xtables_targets; ptr; ptr = ptr->next) { 6450d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (strcmp(name, ptr->name) == 0) 6460d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI break; 6470d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6480d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6490d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#ifndef NO_SHARED_LIBS 6502338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (!ptr && tryload != XTF_DONT_LOAD && tryload != XTF_DURING_LOAD) { 65177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt ptr = load_extension(xtables_libdir, afinfo->libprefix, 65239bf9c8214d3073a496a8a1eff91046a8d6fbbdfJan Engelhardt name, true); 653170af8c566faa9605c1ead558792a031f1d0d48dYasuyuki KOZAKAI 6542338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (ptr == NULL && tryload == XTF_LOAD_MUST_SUCCEED) 6558b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 6560d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "Couldn't load target `%s':%s\n", 657927385017047dce3f01c0aee73ab2989b108bbf0Jan Engelhardt name, strerror(errno)); 6580d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6590d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#else 6600d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (ptr && !ptr->loaded) { 6612338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt if (tryload != XTF_DONT_LOAD) 6620d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr->loaded = 1; 6630d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI else 6640d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr = NULL; 6650d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 666854d2d9bd7556cfd8a676b0bc18dc059a9a2dd25Peter Volkov if (ptr == NULL && tryload == XTF_LOAD_MUST_SUCCEED) { 6678b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 6680d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "Couldn't find target `%s'\n", name); 6690d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6700d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI#endif 6710d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6720d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (ptr) 6730d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI ptr->used = 1; 6740d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6750d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return ptr; 6760d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 6770d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 6787ac405297ec38449b30e3b05fd6bf2082fd3d803Jan Engelhardtstatic int compatible_revision(const char *name, uint8_t revision, int opt) 6790d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 6800d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xt_get_revision rev; 6810d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI socklen_t s = sizeof(rev); 6820d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI int max_rev, sockfd; 6830d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 68477f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt sockfd = socket(afinfo->family, SOCK_RAW, IPPROTO_RAW); 6850d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (sockfd < 0) { 686df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy if (errno == EPERM) { 687df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy /* revision 0 is always supported. */ 688df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy if (revision != 0) 689df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy fprintf(stderr, "Could not determine whether " 690df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy "revision %u is supported, " 691df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy "assuming it is.\n", 692df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy revision); 693df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy return 1; 694df1ef3862761e534c6cec6bd9370285cb5909dd0Patrick McHardy } 6950d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, "Could not open socket to kernel: %s\n", 6960d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI strerror(errno)); 6970d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 6980d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 6990d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 700c021c3ce7b1583eb5dd71b10ac3d8ab3cd36beaaJan Engelhardt xtables_load_ko(xtables_modprobe_program, true); 7010d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7020d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI strcpy(rev.name, name); 7030d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI rev.revision = revision; 7040d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 70577f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt max_rev = getsockopt(sockfd, afinfo->ipproto, opt, &rev, &s); 7060d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (max_rev < 0) { 7070d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Definitely don't support this? */ 7080d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (errno == ENOENT || errno == EPROTONOSUPPORT) { 7090d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI close(sockfd); 7100d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return 0; 7110d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } else if (errno == ENOPROTOOPT) { 7120d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI close(sockfd); 7130d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Assume only revision 0 support (old kernel) */ 7140d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return (revision == 0); 7150d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } else { 7160d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, "getsockopt failed strangely: %s\n", 7170d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI strerror(errno)); 7180d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 7190d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7200d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7210d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI close(sockfd); 7220d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return 1; 7230d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 7240d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7250d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7267ac405297ec38449b30e3b05fd6bf2082fd3d803Jan Engelhardtstatic int compatible_match_revision(const char *name, uint8_t revision) 7270d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 72877f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt return compatible_revision(name, revision, afinfo->so_rev_match); 7290d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 7300d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7317ac405297ec38449b30e3b05fd6bf2082fd3d803Jan Engelhardtstatic int compatible_target_revision(const char *name, uint8_t revision) 7320d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 73377f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt return compatible_revision(name, revision, afinfo->so_rev_target); 7340d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 7350d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 736dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardtstatic void xtables_check_options(const char *name, const struct option *opt) 737dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt{ 738dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt for (; opt->name != NULL; ++opt) 739dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt if (opt->val < 0 || opt->val >= XT_OPTION_OFFSET_SCALE) { 740dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt fprintf(stderr, "%s: Extension %s uses invalid " 741dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt "option value %d\n",xt_params->program_name, 742dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt name, opt->val); 743dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt exit(1); 744dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt } 745dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt} 746dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt 7470d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAIvoid xtables_register_match(struct xtables_match *me) 7480d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 7490d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_match **i, *old; 7500d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 751c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt if (me->version == NULL) { 752c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt fprintf(stderr, "%s: match %s<%u> is missing a version\n", 753c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt xt_params->program_name, me->name, me->revision); 754c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt exit(1); 755c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt } 756dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt if (strcmp(me->version, XTABLES_VERSION) != 0) { 757dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt fprintf(stderr, "%s: match \"%s\" has version \"%s\", " 758dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt "but \"%s\" is required.\n", 7595dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name, 760dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt me->version, XTABLES_VERSION); 7610d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 7620d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7630d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7640cb675b8f18c4b074d4c69461638820708e98100Jan Engelhardt if (strlen(me->name) >= XT_EXTENSION_MAXNAMELEN) { 765281439ba6b96b729ef1400a49ec53eda298bb9f8Li Yewang fprintf(stderr, "%s: match `%s' has invalid name\n", 7665dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 7670d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 7680d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7690d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7700d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (me->family >= NPROTO) { 7710d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, 7720d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "%s: BUG: match %s has invalid protocol family\n", 7735dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 7740d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 7750d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7760d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 777dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt if (me->extra_opts != NULL) 778dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt xtables_check_options(me->name, me->extra_opts); 779dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt 7800d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* ignore not interested match */ 78177f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt if (me->family != afinfo->family && me->family != AF_UNSPEC) 7820d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 7830d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7842338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt old = xtables_find_match(me->name, XTF_DURING_LOAD, NULL); 7850d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (old) { 78623545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt if (old->revision == me->revision && 78723545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt old->family == me->family) { 7880d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, 7890d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "%s: match `%s' already registered.\n", 7905dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 7910d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 7920d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 7930d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 7940d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Now we have two (or more) options, check compatibility. */ 7950d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (compatible_match_revision(old->name, old->revision) 7960d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI && old->revision > me->revision) 7970d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 7980d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 79923545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt /* See if new match can be used. */ 8000d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (!compatible_match_revision(me->name, me->revision)) 8010d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 8020d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 80323545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt /* Prefer !AF_UNSPEC over AF_UNSPEC for same revision. */ 80423545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt if (old->revision == me->revision && me->family == AF_UNSPEC) 80523545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt return; 80623545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt 8070d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Delete old one. */ 8080d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (i = &xtables_matches; *i!=old; i = &(*i)->next); 8090d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI *i = old->next; 8100d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8110d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8120d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (me->size != XT_ALIGN(me->size)) { 8130d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, "%s: match `%s' has invalid size %u.\n", 8145dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name, 8155dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim (unsigned int)me->size); 8160d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 8170d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8180d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8190d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Append to list. */ 8200d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (i = &xtables_matches; *i; i = &(*i)->next); 8210d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->next = NULL; 8220d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI *i = me; 8230d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8240d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->m = NULL; 8250d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->mflags = 0; 8260d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 8270d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8289a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardtvoid xtables_register_matches(struct xtables_match *match, unsigned int n) 8299a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt{ 8309a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt do { 8319a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt xtables_register_match(&match[--n]); 8329a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt } while (n > 0); 8339a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt} 8349a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt 8350d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAIvoid xtables_register_target(struct xtables_target *me) 8360d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI{ 8370d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_target *old; 8380d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 839c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt if (me->version == NULL) { 840c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt fprintf(stderr, "%s: target %s<%u> is missing a version\n", 841c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt xt_params->program_name, me->name, me->revision); 842c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt exit(1); 843c284de545d03aad9a04a4e17cfb55d911a96810cJan Engelhardt } 844dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt if (strcmp(me->version, XTABLES_VERSION) != 0) { 845dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt fprintf(stderr, "%s: target \"%s\" has version \"%s\", " 846dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt "but \"%s\" is required.\n", 8475dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name, 848dacafa55379fd98212031d8c559096c91d7ce93bJan Engelhardt me->version, XTABLES_VERSION); 8490d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 8500d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8510d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8520cb675b8f18c4b074d4c69461638820708e98100Jan Engelhardt if (strlen(me->name) >= XT_EXTENSION_MAXNAMELEN) { 8530d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, "%s: target `%s' has invalid name\n", 8545dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 8550d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 8560d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8570d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8580d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (me->family >= NPROTO) { 8590d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, 8600d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "%s: BUG: target %s has invalid protocol family\n", 8615dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 8620d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 8630d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8640d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 865dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt if (me->extra_opts != NULL) 866dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt xtables_check_options(me->name, me->extra_opts); 867dfbedfedf610210c4ee3f00e9c4f9ea24c4ffe23Jan Engelhardt 8680d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* ignore not interested target */ 86977f48c2f1ef21fa43aa68c25a1457db319ca2526Jan Engelhardt if (me->family != afinfo->family && me->family != AF_UNSPEC) 8700d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 8710d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8722338efd8f799d8373dc196c797bda9690283b698Jan Engelhardt old = xtables_find_target(me->name, XTF_DURING_LOAD); 8730d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (old) { 8740d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI struct xtables_target **i; 8750d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 87623545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt if (old->revision == me->revision && 87723545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt old->family == me->family) { 8780d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, 8790d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI "%s: target `%s' already registered.\n", 8805dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name); 8810d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 8820d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 8830d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 8840d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Now we have two (or more) options, check compatibility. */ 8850d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (compatible_target_revision(old->name, old->revision) 8860d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI && old->revision > me->revision) 8870d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 8880d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 88923545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt /* See if new target can be used. */ 8900d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (!compatible_target_revision(me->name, me->revision)) 8910d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI return; 8920d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 89323545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt /* Prefer !AF_UNSPEC over AF_UNSPEC for same revision. */ 89423545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt if (old->revision == me->revision && me->family == AF_UNSPEC) 89523545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt return; 89623545c2a7a31c68c1e49c7c901b632c2f1c59968Jan Engelhardt 8970d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Delete old one. */ 8980d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI for (i = &xtables_targets; *i!=old; i = &(*i)->next); 8990d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI *i = old->next; 9000d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 9010d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 9020d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI if (me->size != XT_ALIGN(me->size)) { 9030d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI fprintf(stderr, "%s: target `%s' has invalid size %u.\n", 9045dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim xt_params->program_name, me->name, 9055dd19de34380c91ad07bbe79a34726e59891cf54Jamal Hadi Salim (unsigned int)me->size); 9060d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI exit(1); 9070d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI } 9080d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI 9090d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI /* Prepend to list. */ 9100d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->next = xtables_targets; 9110d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI xtables_targets = me; 9120d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->t = NULL; 9130d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI me->tflags = 0; 9140d502bcdbc97ed359e84f6a21dfa0049b3b60a6cYasuyuki KOZAKAI} 915aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt 9169a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardtvoid xtables_register_targets(struct xtables_target *target, unsigned int n) 9179a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt{ 9189a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt do { 9199a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt xtables_register_target(&target[--n]); 9209a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt } while (n > 0); 9219a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt} 9229a8fc4f89ef120d7beda3724994a1544346b947dJan Engelhardt 923a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt/** 924a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * xtables_param_act - act on condition 925a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @status: a constant from enum xtables_exittype 926a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * 927a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * %XTF_ONLY_ONCE: print error message that option may only be used once. 928a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p1: module name (e.g. "mark") 929a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p2(...): option in conflict (e.g. "--mark") 930a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p3(...): condition to match on (see extensions/ for examples) 931a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * 932a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * %XTF_NO_INVERT: option does not support inversion 933a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p1: module name 934a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p2: option in conflict 935a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p3: condition to match on 936a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * 937a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * %XTF_BAD_VALUE: bad value for option 938a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p1: module name 939a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p2: option with which the problem occured (e.g. "--mark") 940a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p3: string the user passed in (e.g. "99999999999999") 941a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * 942a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * %XTF_ONE_ACTION: two mutually exclusive actions have been specified 943a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * @p1: module name 944a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * 945a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt * Displays an error message and exits the program. 946a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt */ 947a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardtvoid xtables_param_act(unsigned int status, const char *p1, ...) 948aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt{ 949aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt const char *p2, *p3; 950aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt va_list args; 951aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt bool b; 952aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt 953aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt va_start(args, p1); 954aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt 955aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt switch (status) { 956a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt case XTF_ONLY_ONCE: 957aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p2 = va_arg(args, const char *); 958aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt b = va_arg(args, unsigned int); 959aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt if (!b) 960aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt return; 9618b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 962aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt "%s: \"%s\" option may only be specified once", 963aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p1, p2); 964aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt break; 965a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt case XTF_NO_INVERT: 966aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p2 = va_arg(args, const char *); 967aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt b = va_arg(args, unsigned int); 968aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt if (!b) 969aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt return; 9708b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 971aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt "%s: \"%s\" option cannot be inverted", p1, p2); 972aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt break; 973a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt case XTF_BAD_VALUE: 974aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p2 = va_arg(args, const char *); 975aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p3 = va_arg(args, const char *); 9768b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 977aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt "%s: Bad value for \"%s\" option: \"%s\"", 978aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt p1, p2, p3); 979aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt break; 980a41545ca7cde43e0ba53260ba74bd9bf74025a68Jan Engelhardt case XTF_ONE_ACTION: 981aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt b = va_arg(args, unsigned int); 982aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt if (!b) 983aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt return; 9848b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 985aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt "%s: At most one action is possible", p1); 986aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt break; 987aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt default: 9888b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(status, p1, args); 989aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt break; 990aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt } 991aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt 992aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt va_end(args); 993aafd269675fc45bac6340027c866ea6073643c3bJan Engelhardt} 99408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 995e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ipaddr_to_numeric(const struct in_addr *addrp) 99608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 99708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt static char buf[20]; 99808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt const unsigned char *bytep = (const void *)&addrp->s_addr; 99908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 100008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt sprintf(buf, "%u.%u.%u.%u", bytep[0], bytep[1], bytep[2], bytep[3]); 100108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return buf; 100208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 100308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 100408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardtstatic const char *ipaddr_to_host(const struct in_addr *addr) 100508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 100608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt struct hostent *host; 100708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 100808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt host = gethostbyaddr(addr, sizeof(struct in_addr), AF_INET); 100908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (host == NULL) 101008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return NULL; 101108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 101208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return host->h_name; 101308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 101408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 101508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardtstatic const char *ipaddr_to_network(const struct in_addr *addr) 101608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 101708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt struct netent *net; 101808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 101908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if ((net = getnetbyaddr(ntohl(addr->s_addr), AF_INET)) != NULL) 102008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return net->n_name; 102108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 102208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return NULL; 102308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 102408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1025e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ipaddr_to_anyname(const struct in_addr *addr) 102608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 102708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt const char *name; 102808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 102908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if ((name = ipaddr_to_host(addr)) != NULL || 103008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt (name = ipaddr_to_network(addr)) != NULL) 103108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return name; 103208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1033e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardt return xtables_ipaddr_to_numeric(addr); 103408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 103508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1036e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ipmask_to_numeric(const struct in_addr *mask) 103708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 103808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt static char buf[20]; 103908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt uint32_t maskaddr, bits; 104008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt int i; 104108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 104208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt maskaddr = ntohl(mask->s_addr); 104308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 104408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (maskaddr == 0xFFFFFFFFL) 104508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt /* we don't want to see "/32" */ 104608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return ""; 104708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 104808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt i = 32; 104908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt bits = 0xFFFFFFFEL; 105008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt while (--i >= 0 && maskaddr != bits) 105108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt bits <<= 1; 105208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (i >= 0) 105308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt sprintf(buf, "/%d", i); 105408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt else 105508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt /* mask was not a decent combination of 1's and 0's */ 1056e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardt sprintf(buf, "/%s", xtables_ipaddr_to_numeric(mask)); 105708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 105808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return buf; 105908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 106008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1061bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in_addr *__numeric_to_ipaddr(const char *dotted, bool is_mask) 1062bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1063bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in_addr addr; 1064bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned char *addrp; 1065bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int onebyte; 1066bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt char buf[20], *p, *q; 1067bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt int i; 1068bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1069bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* copy dotted string, because we need to modify it */ 1070bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt strncpy(buf, dotted, sizeof(buf) - 1); 1071bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt buf[sizeof(buf) - 1] = '\0'; 1072bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = (void *)&addr.s_addr; 1073bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1074bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt p = buf; 1075bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (i = 0; i < 3; ++i) { 1076bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((q = strchr(p, '.')) == NULL) { 1077bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (is_mask) 1078bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1079bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1080bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* autocomplete, this is a network address */ 10815f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (!xtables_strtoui(p, NULL, &onebyte, 0, UINT8_MAX)) 1082bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1083bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1084bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp[i] = onebyte; 1085bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt while (i < 3) 1086bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp[++i] = 0; 1087bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1088bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &addr; 1089bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1090bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1091bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *q = '\0'; 10925f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (!xtables_strtoui(p, NULL, &onebyte, 0, UINT8_MAX)) 1093bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1094bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1095bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp[i] = onebyte; 1096bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt p = q + 1; 1097bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1098bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1099bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* we have checked 3 bytes, now we check the last one */ 11005f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (!xtables_strtoui(p, NULL, &onebyte, 0, UINT8_MAX)) 1101bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1102bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1103bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp[3] = onebyte; 1104bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &addr; 1105bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1106bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 11071e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardtstruct in_addr *xtables_numeric_to_ipaddr(const char *dotted) 1108bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1109bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return __numeric_to_ipaddr(dotted, false); 1110bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1111bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 11121e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardtstruct in_addr *xtables_numeric_to_ipmask(const char *dotted) 1113bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1114bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return __numeric_to_ipaddr(dotted, true); 1115bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1116bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1117bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in_addr *network_to_ipaddr(const char *name) 1118bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1119bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in_addr addr; 1120bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct netent *net; 1121bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1122bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((net = getnetbyname(name)) != NULL) { 1123bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (net->n_addrtype != AF_INET) 1124bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1125bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addr.s_addr = htonl(net->n_net); 1126bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &addr; 1127bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1128bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1129bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1130bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1131bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1132bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in_addr *host_to_ipaddr(const char *name, unsigned int *naddr) 1133bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1134bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct hostent *host; 1135bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in_addr *addr; 1136bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int i; 1137bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1138bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *naddr = 0; 1139bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((host = gethostbyname(name)) != NULL) { 1140bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (host->h_addrtype != AF_INET || 1141bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt host->h_length != sizeof(struct in_addr)) 1142bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1143bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1144bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt while (host->h_addr_list[*naddr] != NULL) 1145bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt ++*naddr; 1146630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt addr = xtables_calloc(*naddr, sizeof(struct in_addr) * *naddr); 1147bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (i = 0; i < *naddr; i++) 1148bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(&addr[i], host->h_addr_list[i], 1149bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt sizeof(struct in_addr)); 1150bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addr; 1151bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1152bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1153bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1154bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1155bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1156bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in_addr * 1157bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtipparse_hostnetwork(const char *name, unsigned int *naddrs) 1158bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1159bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in_addr *addrptmp, *addrp; 1160bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 11611e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardt if ((addrptmp = xtables_numeric_to_ipaddr(name)) != NULL || 1162bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt (addrptmp = network_to_ipaddr(name)) != NULL) { 1163630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt addrp = xtables_malloc(sizeof(struct in_addr)); 1164bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(addrp, addrptmp, sizeof(*addrp)); 1165bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *naddrs = 1; 1166bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrp; 1167bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1168bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((addrptmp = host_to_ipaddr(name, naddrs)) != NULL) 1169bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrptmp; 1170bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 11718b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, "host/network `%s' not found", name); 1172bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1173bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1174bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in_addr *parse_ipmask(const char *mask) 1175bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1176bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in_addr maskaddr; 1177bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in_addr *addrp; 1178bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int bits; 1179bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1180bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (mask == NULL) { 1181bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* no mask at all defaults to 32 bits */ 1182bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt maskaddr.s_addr = 0xFFFFFFFF; 1183bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1184bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 11851e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardt if ((addrp = xtables_numeric_to_ipmask(mask)) != NULL) 1186bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* dotted_to_addr already returns a network byte order addr */ 1187bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrp; 11885f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (!xtables_strtoui(mask, NULL, &bits, 0, 32)) 11898b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 1190bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt "invalid mask `%s' specified", mask); 1191bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (bits != 0) { 1192bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt maskaddr.s_addr = htonl(0xFFFFFFFF << (32 - bits)); 1193bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1194bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1195bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1196bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt maskaddr.s_addr = 0U; 1197bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1198bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1199bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1200332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzowvoid xtables_ipparse_multiple(const char *name, struct in_addr **addrpp, 1201332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow struct in_addr **maskpp, unsigned int *naddrs) 1202332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow{ 1203332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow struct in_addr *addrp; 1204332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow char buf[256], *p; 1205332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow unsigned int len, i, j, n, count = 1; 1206332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow const char *loop = name; 1207332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1208332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow while ((loop = strchr(loop, ',')) != NULL) { 1209332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++count; 1210332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++loop; /* skip ',' */ 1211332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1212332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1213332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *addrpp = xtables_malloc(sizeof(struct in_addr) * count); 1214332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *maskpp = xtables_malloc(sizeof(struct in_addr) * count); 1215332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1216332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow loop = name; 1217332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1218332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (i = 0; i < count; ++i) { 1219332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (loop == NULL) 1220332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1221332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (*loop == ',') 1222332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++loop; 1223332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (*loop == '\0') 1224332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1225332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow p = strchr(loop, ','); 1226332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (p != NULL) 1227332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow len = p - loop; 1228332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow else 1229332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow len = strlen(loop); 1230332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (len == 0 || sizeof(buf) - 1 < len) 1231332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1232332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1233332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow strncpy(buf, loop, len); 1234332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow buf[len] = '\0'; 1235332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow loop += len; 1236332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if ((p = strrchr(buf, '/')) != NULL) { 1237332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *p = '\0'; 1238332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = parse_ipmask(p + 1); 1239332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } else { 1240332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = parse_ipmask(NULL); 1241332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1242332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*maskpp + i, addrp, sizeof(*addrp)); 1243332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1244332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* if a null mask is given, the name is ignored, like in "any/0" */ 1245332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if ((*maskpp + i)->s_addr == 0) 1246332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* 1247332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow * A bit pointless to process multiple addresses 1248332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow * in this case... 1249332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow */ 1250332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow strcpy(buf, "0.0.0.0"); 1251332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1252332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = ipparse_hostnetwork(buf, &n); 1253332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (n > 1) { 1254332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow count += n - 1; 1255332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *addrpp = xtables_realloc(*addrpp, 1256332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(struct in_addr) * count); 1257332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *maskpp = xtables_realloc(*maskpp, 1258332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(struct in_addr) * count); 1259332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (j = 0; j < n; ++j) 1260332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* for each new addr */ 1261332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*addrpp + i + j, addrp + j, 1262332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(*addrp)); 1263332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (j = 1; j < n; ++j) 1264332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* for each new mask */ 1265332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*maskpp + i + j, *maskpp + i, 1266332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(*addrp)); 1267332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow i += n - 1; 1268332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } else { 1269332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*addrpp + i, addrp, sizeof(*addrp)); 1270332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1271332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* free what ipparse_hostnetwork had allocated: */ 1272332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow free(addrp); 1273332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1274332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *naddrs = count; 1275332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (i = 0; i < n; ++i) 1276332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow (*addrpp+i)->s_addr &= (*maskpp+i)->s_addr; 1277332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow} 1278332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1279332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1280a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt/** 1281a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt * xtables_ipparse_any - transform arbitrary name to in_addr 1282a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt * 1283a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt * Possible inputs (pseudo regex): 1284a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt * m{^($hostname|$networkname|$ipaddr)(/$mask)?} 1285a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt * "1.2.3.4/5", "1.2.3.4", "hostname", "networkname" 1286a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt */ 1287a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardtvoid xtables_ipparse_any(const char *name, struct in_addr **addrpp, 1288a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt struct in_addr *maskp, unsigned int *naddrs) 1289bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1290bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int i, j, k, n; 1291bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in_addr *addrp; 1292bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt char buf[256], *p; 1293bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1294bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt strncpy(buf, name, sizeof(buf) - 1); 1295bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt buf[sizeof(buf) - 1] = '\0'; 1296bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((p = strrchr(buf, '/')) != NULL) { 1297bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *p = '\0'; 1298bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = parse_ipmask(p + 1); 1299bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } else { 1300bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = parse_ipmask(NULL); 1301bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1302bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(maskp, addrp, sizeof(*maskp)); 1303bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1304bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* if a null mask is given, the name is ignored, like in "any/0" */ 1305bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (maskp->s_addr == 0U) 1306bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt strcpy(buf, "0.0.0.0"); 1307bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1308bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = *addrpp = ipparse_hostnetwork(buf, naddrs); 1309bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt n = *naddrs; 1310bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (i = 0, j = 0; i < n; ++i) { 1311bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp[j++].s_addr &= maskp->s_addr; 1312bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (k = 0; k < j - 1; ++k) 1313bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (addrp[k].s_addr == addrp[j-1].s_addr) { 1314bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt --*naddrs; 1315bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt --j; 1316bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt break; 1317bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1318bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1319bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1320bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1321e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ip6addr_to_numeric(const struct in6_addr *addrp) 132208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 132308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt /* 0000:0000:0000:0000:0000:000.000.000.000 132408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt * 0000:0000:0000:0000:0000:0000:0000:0000 */ 132508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt static char buf[50+1]; 132608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return inet_ntop(AF_INET6, addrp, buf, sizeof(buf)); 132708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 132808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 132908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardtstatic const char *ip6addr_to_host(const struct in6_addr *addr) 133008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 133108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt static char hostname[NI_MAXHOST]; 133208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt struct sockaddr_in6 saddr; 133308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt int err; 133408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 133508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt memset(&saddr, 0, sizeof(struct sockaddr_in6)); 133608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt memcpy(&saddr.sin6_addr, addr, sizeof(*addr)); 133708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt saddr.sin6_family = AF_INET6; 133808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 133908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt err = getnameinfo((const void *)&saddr, sizeof(struct sockaddr_in6), 134008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt hostname, sizeof(hostname) - 1, NULL, 0, 0); 134108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (err != 0) { 134208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt#ifdef DEBUG 134308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt fprintf(stderr,"IP2Name: %s\n",gai_strerror(err)); 134408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt#endif 134508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return NULL; 134608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt } 134708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 134808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt#ifdef DEBUG 134908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt fprintf (stderr, "\naddr2host: %s\n", hostname); 135008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt#endif 135108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return hostname; 135208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 135308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1354e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ip6addr_to_anyname(const struct in6_addr *addr) 135508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 135608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt const char *name; 135708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 135808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if ((name = ip6addr_to_host(addr)) != NULL) 135908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return name; 136008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1361e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardt return xtables_ip6addr_to_numeric(addr); 136208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 136308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 136408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardtstatic int ip6addr_prefix_length(const struct in6_addr *k) 136508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 136608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt unsigned int bits = 0; 136708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt uint32_t a, b, c, d; 136808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 136948607816796124ce2177ee22645d3fd8180f1e98Jan Engelhardt a = ntohl(k->s6_addr32[0]); 137048607816796124ce2177ee22645d3fd8180f1e98Jan Engelhardt b = ntohl(k->s6_addr32[1]); 137148607816796124ce2177ee22645d3fd8180f1e98Jan Engelhardt c = ntohl(k->s6_addr32[2]); 137248607816796124ce2177ee22645d3fd8180f1e98Jan Engelhardt d = ntohl(k->s6_addr32[3]); 137308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt while (a & 0x80000000U) { 137408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt ++bits; 137508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt a <<= 1; 137608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt a |= (b >> 31) & 1; 137708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt b <<= 1; 137808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt b |= (c >> 31) & 1; 137908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt c <<= 1; 138008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt c |= (d >> 31) & 1; 138108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt d <<= 1; 138208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt } 138308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (a != 0 || b != 0 || c != 0 || d != 0) 138408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return -1; 138508b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return bits; 138608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 138708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 1388e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardtconst char *xtables_ip6mask_to_numeric(const struct in6_addr *addrp) 138908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt{ 139008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt static char buf[50+2]; 139108b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt int l = ip6addr_prefix_length(addrp); 139208b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt 139308b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt if (l == -1) { 139408b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt strcpy(buf, "/"); 1395e44ea7faa17c10c68f14f5338a7cc6e3291a0ce7Jan Engelhardt strcat(buf, xtables_ip6addr_to_numeric(addrp)); 139608b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return buf; 139708b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt } 139808b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt sprintf(buf, "/%d", l); 139908b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt return buf; 140008b1616e068166e016b3ee7110db10ae5d853422Jan Engelhardt} 1401bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 14021e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardtstruct in6_addr *xtables_numeric_to_ip6addr(const char *num) 1403bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1404bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in6_addr ap; 1405bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt int err; 1406bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1407bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((err = inet_pton(AF_INET6, num, &ap)) == 1) 1408bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return ≈ 1409bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#ifdef DEBUG 1410bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt fprintf(stderr, "\nnumeric2addr: %d\n", err); 1411bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#endif 1412bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1413bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1414bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1415bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in6_addr * 1416bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardthost_to_ip6addr(const char *name, unsigned int *naddr) 1417bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1418bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in6_addr *addr; 1419bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct addrinfo hints; 1420bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct addrinfo *res; 1421bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt int err; 1422bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1423bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memset(&hints, 0, sizeof(hints)); 1424bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt hints.ai_flags = AI_CANONNAME; 1425bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt hints.ai_family = AF_INET6; 1426bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt hints.ai_socktype = SOCK_RAW; 1427bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt hints.ai_protocol = IPPROTO_IPV6; 1428bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt hints.ai_next = NULL; 1429bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1430bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *naddr = 0; 1431bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((err = getaddrinfo(name, NULL, &hints, &res)) != 0) { 1432bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#ifdef DEBUG 1433bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt fprintf(stderr,"Name2IP: %s\n",gai_strerror(err)); 1434bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#endif 1435bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1436bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } else { 1437bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (res->ai_family != AF_INET6 || 1438bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt res->ai_addrlen != sizeof(struct sockaddr_in6)) 1439bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1440bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1441bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#ifdef DEBUG 1442bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt fprintf(stderr, "resolved: len=%d %s ", res->ai_addrlen, 144330290aea009cf3fd76f27336fb4370be3467c4daPatrick McHardy xtables_ip6addr_to_numeric(&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr)); 1444bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt#endif 1445bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* Get the first element of the address-chain */ 1446630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt addr = xtables_malloc(sizeof(struct in6_addr)); 1447bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(addr, &((const struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1448bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt sizeof(struct in6_addr)); 1449bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt freeaddrinfo(res); 1450bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *naddr = 1; 1451bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addr; 1452bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1453bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1454bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1455bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1456bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1457bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in6_addr *network_to_ip6addr(const char *name) 1458bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1459bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* abort();*/ 1460bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* TODO: not implemented yet, but the exception breaks the 1461bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt * name resolvation */ 1462bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return NULL; 1463bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1464bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1465bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in6_addr * 1466bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtip6parse_hostnetwork(const char *name, unsigned int *naddrs) 1467bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1468bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in6_addr *addrp, *addrptmp; 1469bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 14701e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardt if ((addrptmp = xtables_numeric_to_ip6addr(name)) != NULL || 1471bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt (addrptmp = network_to_ip6addr(name)) != NULL) { 1472630ef48037f3602333addfdb53789c9c6a4bb4c8Jan Engelhardt addrp = xtables_malloc(sizeof(struct in6_addr)); 1473bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(addrp, addrptmp, sizeof(*addrp)); 1474bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *naddrs = 1; 1475bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrp; 1476bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1477bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((addrp = host_to_ip6addr(name, naddrs)) != NULL) 1478bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrp; 1479bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 14808b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, "host/network `%s' not found", name); 1481bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1482bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1483bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardtstatic struct in6_addr *parse_ip6mask(char *mask) 1484bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 1485bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt static struct in6_addr maskaddr; 1486bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in6_addr *addrp; 1487bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int bits; 1488bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1489bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (mask == NULL) { 1490bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* no mask at all defaults to 128 bits */ 1491bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memset(&maskaddr, 0xff, sizeof maskaddr); 1492bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1493bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 14941e01b0b82f70b0b11dcfbced485dbe7aeac4fb8cJan Engelhardt if ((addrp = xtables_numeric_to_ip6addr(mask)) != NULL) 1495bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return addrp; 14965f2922cfc0bbfbeb878f5c12e9fb3eb602ae5507Jan Engelhardt if (!xtables_strtoui(mask, NULL, &bits, 0, 128)) 14978b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 1498bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt "invalid mask `%s' specified", mask); 1499bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (bits != 0) { 1500bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt char *p = (void *)&maskaddr; 1501bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memset(p, 0xff, bits / 8); 1502bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memset(p + (bits / 8) + 1, 0, (128 - bits) / 8); 1503bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt p[bits/8] = 0xff << (8 - (bits & 7)); 1504bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1505bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1506bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1507bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memset(&maskaddr, 0, sizeof(maskaddr)); 1508bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt return &maskaddr; 1509bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1510bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1511332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzowvoid 1512332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzowxtables_ip6parse_multiple(const char *name, struct in6_addr **addrpp, 1513332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow struct in6_addr **maskpp, unsigned int *naddrs) 1514332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow{ 151558df90174164fd673e8c4103f7ce0c4e55ef1aecOlaf Rempel static const struct in6_addr zero_addr; 1516332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow struct in6_addr *addrp; 1517332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow char buf[256], *p; 1518332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow unsigned int len, i, j, n, count = 1; 1519332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow const char *loop = name; 1520332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1521332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow while ((loop = strchr(loop, ',')) != NULL) { 1522332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++count; 1523332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++loop; /* skip ',' */ 1524332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1525332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1526332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *addrpp = xtables_malloc(sizeof(struct in6_addr) * count); 1527332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *maskpp = xtables_malloc(sizeof(struct in6_addr) * count); 1528332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1529332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow loop = name; 1530332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1531332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (i = 0; i < count /*NB: count can grow*/; ++i) { 1532332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (loop == NULL) 1533332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1534332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (*loop == ',') 1535332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ++loop; 1536332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (*loop == '\0') 1537332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1538332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow p = strchr(loop, ','); 1539332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (p != NULL) 1540332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow len = p - loop; 1541332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow else 1542332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow len = strlen(loop); 1543332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (len == 0 || sizeof(buf) - 1 < len) 1544332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow break; 1545332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1546332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow strncpy(buf, loop, len); 1547332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow buf[len] = '\0'; 1548332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow loop += len; 1549332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if ((p = strrchr(buf, '/')) != NULL) { 1550332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *p = '\0'; 1551332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = parse_ip6mask(p + 1); 1552332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } else { 1553332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = parse_ip6mask(NULL); 1554332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1555332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*maskpp + i, addrp, sizeof(*addrp)); 1556332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1557332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* if a null mask is given, the name is ignored, like in "any/0" */ 155858df90174164fd673e8c4103f7ce0c4e55ef1aecOlaf Rempel if (memcmp(*maskpp + i, &zero_addr, sizeof(zero_addr)) == 0) 1559332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow strcpy(buf, "::"); 1560332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1561332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow addrp = ip6parse_hostnetwork(buf, &n); 1562332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* ip6parse_hostnetwork only ever returns one IP 1563332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow address (it exits if the resolution fails). 1564332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow Therefore, n will always be 1 here. Leaving the 1565332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow code below in anyway in case ip6parse_hostnetwork 1566332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow is improved some day to behave like 1567332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow ipparse_hostnetwork: */ 1568332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow if (n > 1) { 1569332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow count += n - 1; 1570332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *addrpp = xtables_realloc(*addrpp, 1571332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(struct in6_addr) * count); 1572332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *maskpp = xtables_realloc(*maskpp, 1573332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(struct in6_addr) * count); 1574332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (j = 0; j < n; ++j) 1575332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* for each new addr */ 1576332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*addrpp + i + j, addrp + j, 1577332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(*addrp)); 1578332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (j = 1; j < n; ++j) 1579332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* for each new mask */ 1580332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*maskpp + i + j, *maskpp + i, 1581332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow sizeof(*addrp)); 1582332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow i += n - 1; 1583332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } else { 1584332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow memcpy(*addrpp + i, addrp, sizeof(*addrp)); 1585332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1586332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow /* free what ip6parse_hostnetwork had allocated: */ 1587332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow free(addrp); 1588332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow } 1589332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow *naddrs = count; 1590332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (i = 0; i < n; ++i) 1591332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow for (j = 0; j < 4; ++j) 1592332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow (*addrpp+i)->s6_addr32[j] &= (*maskpp+i)->s6_addr32[j]; 1593332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow} 1594332e4acc574e3a348fe611d55bf642de0d50fbdaMichael Granzow 1595a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardtvoid xtables_ip6parse_any(const char *name, struct in6_addr **addrpp, 1596a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardt struct in6_addr *maskp, unsigned int *naddrs) 1597bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt{ 15989c0fa7d8c84dc2478bd36d31b328b697fbe4d0afJan Engelhardt static const struct in6_addr zero_addr; 1599bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt struct in6_addr *addrp; 1600bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt unsigned int i, j, k, n; 1601bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt char buf[256], *p; 1602bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1603bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt strncpy(buf, name, sizeof(buf) - 1); 1604bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt buf[sizeof(buf)-1] = '\0'; 1605bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if ((p = strrchr(buf, '/')) != NULL) { 1606bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt *p = '\0'; 1607bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = parse_ip6mask(p + 1); 1608bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } else { 1609bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = parse_ip6mask(NULL); 1610bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1611bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt memcpy(maskp, addrp, sizeof(*maskp)); 1612bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1613bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt /* if a null mask is given, the name is ignored, like in "any/0" */ 16149c0fa7d8c84dc2478bd36d31b328b697fbe4d0afJan Engelhardt if (memcmp(maskp, &zero_addr, sizeof(zero_addr)) == 0) 1615bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt strcpy(buf, "::"); 1616bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt 1617bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt addrp = *addrpp = ip6parse_hostnetwork(buf, naddrs); 1618bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt n = *naddrs; 1619bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (i = 0, j = 0; i < n; ++i) { 1620bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (k = 0; k < 4; ++k) 16215a2208c3e62a150e6f6297abbfa63056ab4a8066Yasuyuki Kozakai addrp[j].s6_addr32[k] &= maskp->s6_addr32[k]; 1622bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt ++j; 1623bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt for (k = 0; k < j - 1; ++k) 1624bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt if (IN6_ARE_ADDR_EQUAL(&addrp[k], &addrp[j - 1])) { 1625bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt --*naddrs; 1626bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt --j; 1627bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt break; 1628bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1629bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt } 1630bd9438420d92c41a5cf20a53b7a18d3ddea4216dJan Engelhardt} 1631a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann 1632a0baae85f8159f03d52535934aa9b3a375e0f1f3Jan Engelhardtvoid xtables_save_string(const char *value) 1633a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann{ 1634a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann static const char no_quote_chars[] = "_-0123456789" 1635a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann "abcdefghijklmnopqrstuvwxyz" 1636a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 1637a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann static const char escape_chars[] = "\"\\'"; 1638a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann size_t length; 1639a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann const char *p; 1640a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann 164187dc7c4c842deb1e2e3d38089ffcad9f238d98deMax Kellerman length = strspn(value, no_quote_chars); 1642a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann if (length > 0 && value[length] == 0) { 1643a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann /* no quoting required */ 1644a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann putchar(' '); 164573866357e4a7a0fdc1b293bf8863fee2bd56da9eJan Engelhardt fputs(value, stdout); 1646a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann } else { 1647a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann /* there is at least one dangerous character in the 1648a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann value, which we have to quote. Write double quotes 1649a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann around the value and escape special characters with 1650a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann a backslash */ 165173866357e4a7a0fdc1b293bf8863fee2bd56da9eJan Engelhardt printf(" \""); 1652a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann 1653a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann for (p = strpbrk(value, escape_chars); p != NULL; 1654a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann p = strpbrk(value, escape_chars)) { 1655a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann if (p > value) 1656a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann fwrite(value, 1, p - value, stdout); 1657a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann putchar('\\'); 1658a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann putchar(*p); 1659a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann value = p + 1; 1660a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann } 1661a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann 1662a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann /* print the rest and finish the double quoted 1663a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann string */ 1664a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann fputs(value, stdout); 166573866357e4a7a0fdc1b293bf8863fee2bd56da9eJan Engelhardt putchar('\"'); 1666a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann } 1667a5d099400fd6f9ad3880dda10f85d2aa36b5ec65Max Kellermann} 16680f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt 16690f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt/** 16700f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt * Check for option-intrapositional negation. 16710f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt * Do not use in new code. 16720f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt */ 16730f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardtint xtables_check_inverse(const char option[], int *invert, 1674bf97128c7262f17a02fec41cdae75b472ba77f88Jan Engelhardt int *my_optind, int argc, char **argv) 16750f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt{ 16762be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt if (option == NULL || strcmp(option, "!") != 0) 16772be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt return false; 16780f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt 16792be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt fprintf(stderr, "Using intrapositioned negation " 16802be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt "(`--option ! this`) is deprecated in favor of " 16812be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt "extrapositioned (`! --option this`).\n"); 16820f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt 16832be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt if (*invert) 16842be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 16852be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt "Multiple `!' flags not allowed"); 16862be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt *invert = true; 16872be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt if (my_optind != NULL) { 1688bf97128c7262f17a02fec41cdae75b472ba77f88Jan Engelhardt optarg = argv[*my_optind]; 16892be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt ++*my_optind; 16902be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt if (argc && *my_optind > argc) 16912be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt xt_params->exit_err(PARAMETER_PROBLEM, 16922be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt "no argument following `!'"); 16930f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt } 16942be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt 16952be22fb36dd1268baecb42ddf35b7a40a6de21d7Jan Engelhardt return true; 16960f16c725aadaac7e670d632ecbaea3661ff00827Jan Engelhardt} 16971de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 16981de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardtconst struct xtables_pprot xtables_chain_protos[] = { 16991de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"tcp", IPPROTO_TCP}, 17001de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"sctp", IPPROTO_SCTP}, 17011de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"udp", IPPROTO_UDP}, 17021de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"udplite", IPPROTO_UDPLITE}, 17031de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"icmp", IPPROTO_ICMP}, 17041de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"icmpv6", IPPROTO_ICMPV6}, 17051de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"ipv6-icmp", IPPROTO_ICMPV6}, 17061de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"esp", IPPROTO_ESP}, 17071de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"ah", IPPROTO_AH}, 17081de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"ipv6-mh", IPPROTO_MH}, 17091de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"mh", IPPROTO_MH}, 17101de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {"all", 0}, 17111de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt {NULL}, 17121de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt}; 17131de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 17147ac405297ec38449b30e3b05fd6bf2082fd3d803Jan Engelhardtuint16_t 17151de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardtxtables_parse_protocol(const char *s) 17161de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt{ 17171de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt unsigned int proto; 17181de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 17191de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt if (!xtables_strtoui(s, NULL, &proto, 0, UINT8_MAX)) { 17201de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt struct protoent *pent; 17211de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 17221de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt /* first deal with the special case of 'all' to prevent 17231de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt * people from being able to redefine 'all' in nsswitch 17241de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt * and/or provoke expensive [not working] ldap/nis/... 17251de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt * lookups */ 17261de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt if (!strcmp(s, "all")) 17271de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt return 0; 17281de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 17291de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt if ((pent = getprotobyname(s))) 17301de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt proto = pent->p_proto; 17311de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt else { 17321de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt unsigned int i; 17331de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt for (i = 0; i < ARRAY_SIZE(xtables_chain_protos); ++i) { 1734e55cc4aaa6e35448c14370e5261c3387d26b257dPablo Neira Ayuso if (xtables_chain_protos[i].name == NULL) 1735e55cc4aaa6e35448c14370e5261c3387d26b257dPablo Neira Ayuso continue; 1736e55cc4aaa6e35448c14370e5261c3387d26b257dPablo Neira Ayuso 17371de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt if (strcmp(s, xtables_chain_protos[i].name) == 0) { 17381de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt proto = xtables_chain_protos[i].num; 17391de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt break; 17401de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt } 17411de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt } 17421de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt if (i == ARRAY_SIZE(xtables_chain_protos)) 17438b7baebc93989106fd5d26b262d0ce191f8ef7c0Jamal Hadi Salim xt_params->exit_err(PARAMETER_PROBLEM, 17441de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt "unknown protocol `%s' specified", 17451de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt s); 17461de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt } 17471de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt } 17481de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt 17491de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt return proto; 17501de7edffc9085c0f41c261dca995e28ae4126c29Jan Engelhardt} 1751