| /* Code to take an ip6tables-style command line and do it. */ |
| |
| /* |
| * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au |
| * |
| * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>: |
| * Paul 'Rusty' Russell <rusty@rustcorp.com.au> |
| * Marc Boucher <marc+nf@mbsi.ca> |
| * James Morris <jmorris@intercode.com.au> |
| * Harald Welte <laforge@gnumonks.org> |
| * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <getopt.h> |
| #include <string.h> |
| #include <netdb.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <ctype.h> |
| #include <stdarg.h> |
| #include <limits.h> |
| #include <ip6tables.h> |
| #include <xtables.h> |
| #include <arpa/inet.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| #ifndef TRUE |
| #define TRUE 1 |
| #endif |
| #ifndef FALSE |
| #define FALSE 0 |
| #endif |
| |
| #define FMT_NUMERIC 0x0001 |
| #define FMT_NOCOUNTS 0x0002 |
| #define FMT_KILOMEGAGIGA 0x0004 |
| #define FMT_OPTIONS 0x0008 |
| #define FMT_NOTABLE 0x0010 |
| #define FMT_NOTARGET 0x0020 |
| #define FMT_VIA 0x0040 |
| #define FMT_NONEWLINE 0x0080 |
| #define FMT_LINENUMBERS 0x0100 |
| |
| #define FMT_PRINT_RULE (FMT_NOCOUNTS | FMT_OPTIONS | FMT_VIA \ |
| | FMT_NUMERIC | FMT_NOTABLE) |
| #define FMT(tab,notab) ((format) & FMT_NOTABLE ? (notab) : (tab)) |
| |
| |
| #define CMD_NONE 0x0000U |
| #define CMD_INSERT 0x0001U |
| #define CMD_DELETE 0x0002U |
| #define CMD_DELETE_NUM 0x0004U |
| #define CMD_REPLACE 0x0008U |
| #define CMD_APPEND 0x0010U |
| #define CMD_LIST 0x0020U |
| #define CMD_FLUSH 0x0040U |
| #define CMD_ZERO 0x0080U |
| #define CMD_NEW_CHAIN 0x0100U |
| #define CMD_DELETE_CHAIN 0x0200U |
| #define CMD_SET_POLICY 0x0400U |
| #define CMD_RENAME_CHAIN 0x0800U |
| #define NUMBER_OF_CMD 13 |
| static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z', |
| 'N', 'X', 'P', 'E' }; |
| |
| #define OPTION_OFFSET 256 |
| |
| #define OPT_NONE 0x00000U |
| #define OPT_NUMERIC 0x00001U |
| #define OPT_SOURCE 0x00002U |
| #define OPT_DESTINATION 0x00004U |
| #define OPT_PROTOCOL 0x00008U |
| #define OPT_JUMP 0x00010U |
| #define OPT_VERBOSE 0x00020U |
| #define OPT_EXPANDED 0x00040U |
| #define OPT_VIANAMEIN 0x00080U |
| #define OPT_VIANAMEOUT 0x00100U |
| #define OPT_LINENUMBERS 0x00200U |
| #define OPT_COUNTERS 0x00400U |
| #define NUMBER_OF_OPT 11 |
| static const char optflags[NUMBER_OF_OPT] |
| = { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'}; |
| |
| static struct option original_opts[] = { |
| { "append", 1, 0, 'A' }, |
| { "delete", 1, 0, 'D' }, |
| { "insert", 1, 0, 'I' }, |
| { "replace", 1, 0, 'R' }, |
| { "list", 2, 0, 'L' }, |
| { "flush", 2, 0, 'F' }, |
| { "zero", 2, 0, 'Z' }, |
| { "new-chain", 1, 0, 'N' }, |
| { "delete-chain", 2, 0, 'X' }, |
| { "rename-chain", 1, 0, 'E' }, |
| { "policy", 1, 0, 'P' }, |
| { "source", 1, 0, 's' }, |
| { "destination", 1, 0, 'd' }, |
| { "src", 1, 0, 's' }, /* synonym */ |
| { "dst", 1, 0, 'd' }, /* synonym */ |
| { "protocol", 1, 0, 'p' }, |
| { "in-interface", 1, 0, 'i' }, |
| { "jump", 1, 0, 'j' }, |
| { "table", 1, 0, 't' }, |
| { "match", 1, 0, 'm' }, |
| { "numeric", 0, 0, 'n' }, |
| { "out-interface", 1, 0, 'o' }, |
| { "verbose", 0, 0, 'v' }, |
| { "exact", 0, 0, 'x' }, |
| { "version", 0, 0, 'V' }, |
| { "help", 2, 0, 'h' }, |
| { "line-numbers", 0, 0, '0' }, |
| { "modprobe", 1, 0, 'M' }, |
| { "set-counters", 1, 0, 'c' }, |
| { 0 } |
| }; |
| |
| /* we need this for ip6tables-restore. ip6tables-restore.c sets line to the |
| * current line of the input file, in order to give a more precise error |
| * message. ip6tables itself doesn't need this, so it is initialized to the |
| * magic number of -1 */ |
| int line = -1; |
| |
| static struct option *opts = original_opts; |
| static unsigned int global_option_offset = 0; |
| |
| /* Table of legal combinations of commands and options. If any of the |
| * given commands make an option legal, that option is legal (applies to |
| * CMD_LIST and CMD_ZERO only). |
| * Key: |
| * + compulsory |
| * x illegal |
| * optional |
| */ |
| |
| static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] = |
| /* Well, it's better than "Re: Linux vs FreeBSD" */ |
| { |
| /* -n -s -d -p -j -v -x -i -o --line -c */ |
| /*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, |
| /*DELETE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'}, |
| /*DELETE_NUM*/{'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*REPLACE*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, |
| /*APPEND*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x',' '}, |
| /*LIST*/ {' ','x','x','x','x',' ',' ','x','x',' ','x'}, |
| /*FLUSH*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*ZERO*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*NEW_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*DEL_CHAIN*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*SET_POLICY*/{'x','x','x','x','x',' ','x','x','x','x','x'}, |
| /*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x'} |
| }; |
| |
| static int inverse_for_options[NUMBER_OF_OPT] = |
| { |
| /* -n */ 0, |
| /* -s */ IP6T_INV_SRCIP, |
| /* -d */ IP6T_INV_DSTIP, |
| /* -p */ IP6T_INV_PROTO, |
| /* -j */ 0, |
| /* -v */ 0, |
| /* -x */ 0, |
| /* -i */ IP6T_INV_VIA_IN, |
| /* -o */ IP6T_INV_VIA_OUT, |
| /*--line*/ 0, |
| /* -c */ 0, |
| }; |
| |
| const char *program_version; |
| const char *program_name; |
| |
| /* Extra debugging from libiptc */ |
| extern void dump_entries6(const ip6tc_handle_t handle); |
| |
| /* A few hardcoded protocols for 'all' and in case the user has no |
| /etc/protocols */ |
| struct pprot { |
| char *name; |
| u_int8_t num; |
| }; |
| |
| struct afinfo afinfo = { |
| .family = AF_INET6, |
| .libprefix = "libip6t_", |
| .ipproto = IPPROTO_IPV6, |
| .kmod = "ip6_tables", |
| .so_rev_match = IP6T_SO_GET_REVISION_MATCH, |
| .so_rev_target = IP6T_SO_GET_REVISION_TARGET, |
| }; |
| |
| /* Primitive headers... */ |
| /* defined in netinet/in.h */ |
| #if 0 |
| #ifndef IPPROTO_ESP |
| #define IPPROTO_ESP 50 |
| #endif |
| #ifndef IPPROTO_AH |
| #define IPPROTO_AH 51 |
| #endif |
| #endif |
| #ifndef IPPROTO_MH |
| #define IPPROTO_MH 135 |
| #endif |
| |
| static const struct pprot chain_protos[] = { |
| { "tcp", IPPROTO_TCP }, |
| { "udp", IPPROTO_UDP }, |
| { "udplite", IPPROTO_UDPLITE }, |
| { "icmpv6", IPPROTO_ICMPV6 }, |
| { "ipv6-icmp", IPPROTO_ICMPV6 }, |
| { "esp", IPPROTO_ESP }, |
| { "ah", IPPROTO_AH }, |
| { "ipv6-mh", IPPROTO_MH }, |
| { "mh", IPPROTO_MH }, |
| { "all", 0 }, |
| }; |
| |
| static char * |
| proto_to_name(u_int8_t proto, int nolookup) |
| { |
| unsigned int i; |
| |
| if (proto && !nolookup) { |
| struct protoent *pent = getprotobynumber(proto); |
| if (pent) |
| return pent->p_name; |
| } |
| |
| for (i = 0; i < sizeof(chain_protos)/sizeof(struct pprot); i++) |
| if (chain_protos[i].num == proto) |
| return chain_protos[i].name; |
| |
| return NULL; |
| } |
| |
| static void free_opts(int reset_offset) |
| { |
| if (opts != original_opts) { |
| free(opts); |
| opts = original_opts; |
| if (reset_offset) |
| global_option_offset = 0; |
| } |
| } |
| |
| static void |
| exit_tryhelp(int status) |
| { |
| if (line != -1) |
| fprintf(stderr, "Error occurred at line: %d\n", line); |
| fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n", |
| program_name, program_name ); |
| free_opts(1); |
| exit(status); |
| } |
| |
| static void |
| exit_printhelp(struct ip6tables_rule_match *matches) |
| { |
| struct ip6tables_rule_match *matchp = NULL; |
| struct ip6tables_target *t = NULL; |
| |
| printf("%s v%s\n\n" |
| "Usage: %s -[AD] chain rule-specification [options]\n" |
| " %s -[RI] chain rulenum rule-specification [options]\n" |
| " %s -D chain rulenum [options]\n" |
| " %s -[LFZ] [chain] [options]\n" |
| " %s -[NX] chain\n" |
| " %s -E old-chain-name new-chain-name\n" |
| " %s -P chain target [options]\n" |
| " %s -h (print this help information)\n\n", |
| program_name, program_version, program_name, program_name, |
| program_name, program_name, program_name, program_name, |
| program_name, program_name); |
| |
| printf( |
| "Commands:\n" |
| "Either long or short options are allowed.\n" |
| " --append -A chain Append to chain\n" |
| " --delete -D chain Delete matching rule from chain\n" |
| " --delete -D chain rulenum\n" |
| " Delete rule rulenum (1 = first) from chain\n" |
| " --insert -I chain [rulenum]\n" |
| " Insert in chain as rulenum (default 1=first)\n" |
| " --replace -R chain rulenum\n" |
| " Replace rule rulenum (1 = first) in chain\n" |
| " --list -L [chain] List the rules in a chain or all chains\n" |
| " --flush -F [chain] Delete all rules in chain or all chains\n" |
| " --zero -Z [chain] Zero counters in chain or all chains\n" |
| " --new -N chain Create a new user-defined chain\n" |
| " --delete-chain\n" |
| " -X [chain] Delete a user-defined chain\n" |
| " --policy -P chain target\n" |
| " Change policy on chain to target\n" |
| " --rename-chain\n" |
| " -E old-chain new-chain\n" |
| " Change chain name, (moving any references)\n" |
| |
| "Options:\n" |
| " --proto -p [!] proto protocol: by number or name, eg. `tcp'\n" |
| " --source -s [!] address[/mask]\n" |
| " source specification\n" |
| " --destination -d [!] address[/mask]\n" |
| " destination specification\n" |
| " --in-interface -i [!] input name[+]\n" |
| " network interface name ([+] for wildcard)\n" |
| " --jump -j target\n" |
| " target for rule (may load target extension)\n" |
| " --match -m match\n" |
| " extended match (may load extension)\n" |
| " --numeric -n numeric output of addresses and ports\n" |
| " --out-interface -o [!] output name[+]\n" |
| " network interface name ([+] for wildcard)\n" |
| " --table -t table table to manipulate (default: `filter')\n" |
| " --verbose -v verbose mode\n" |
| " --line-numbers print line numbers when listing\n" |
| " --exact -x expand numbers (display exact values)\n" |
| /*"[!] --fragment -f match second or further fragments only\n"*/ |
| " --modprobe=<command> try to insert modules using this command\n" |
| " --set-counters PKTS BYTES set the counter during insert/append\n" |
| "[!] --version -V print package version.\n"); |
| |
| /* Print out any special helps. A user might like to be able to add a --help |
| to the commandline, and see expected results. So we call help for all |
| specified matches & targets */ |
| for (t = xtables_targets; t; t = t->next) { |
| if (t->used) { |
| printf("\n"); |
| t->help(); |
| } |
| } |
| for (matchp = matches; matchp; matchp = matchp->next) { |
| printf("\n"); |
| matchp->match->help(); |
| } |
| exit(0); |
| } |
| |
| void |
| exit_error(enum exittype status, const char *msg, ...) |
| { |
| va_list args; |
| |
| va_start(args, msg); |
| fprintf(stderr, "%s v%s: ", program_name, program_version); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, "\n"); |
| if (status == PARAMETER_PROBLEM) |
| exit_tryhelp(status); |
| if (status == VERSION_PROBLEM) |
| fprintf(stderr, |
| "Perhaps ip6tables or your kernel needs to be upgraded.\n"); |
| /* On error paths, make sure that we don't leak memory */ |
| free_opts(1); |
| exit(status); |
| } |
| |
| static void |
| generic_opt_check(int command, int options) |
| { |
| int i, j, legal = 0; |
| |
| /* Check that commands are valid with options. Complicated by the |
| * fact that if an option is legal with *any* command given, it is |
| * legal overall (ie. -z and -l). |
| */ |
| for (i = 0; i < NUMBER_OF_OPT; i++) { |
| legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */ |
| |
| for (j = 0; j < NUMBER_OF_CMD; j++) { |
| if (!(command & (1<<j))) |
| continue; |
| |
| if (!(options & (1<<i))) { |
| if (commands_v_options[j][i] == '+') |
| exit_error(PARAMETER_PROBLEM, |
| "You need to supply the `-%c' " |
| "option for this command\n", |
| optflags[i]); |
| } else { |
| if (commands_v_options[j][i] != 'x') |
| legal = 1; |
| else if (legal == 0) |
| legal = -1; |
| } |
| } |
| if (legal == -1) |
| exit_error(PARAMETER_PROBLEM, |
| "Illegal option `-%c' with this command\n", |
| optflags[i]); |
| } |
| } |
| |
| static char |
| opt2char(int option) |
| { |
| const char *ptr; |
| for (ptr = optflags; option > 1; option >>= 1, ptr++); |
| |
| return *ptr; |
| } |
| |
| static char |
| cmd2char(int option) |
| { |
| const char *ptr; |
| for (ptr = cmdflags; option > 1; option >>= 1, ptr++); |
| |
| return *ptr; |
| } |
| |
| static void |
| add_command(unsigned int *cmd, const int newcmd, const int othercmds, |
| int invert) |
| { |
| if (invert) |
| exit_error(PARAMETER_PROBLEM, "unexpected ! flag"); |
| if (*cmd & (~othercmds)) |
| exit_error(PARAMETER_PROBLEM, "Can't use -%c with -%c\n", |
| cmd2char(newcmd), cmd2char(*cmd & (~othercmds))); |
| *cmd |= newcmd; |
| } |
| |
| int |
| check_inverse(const char option[], int *invert, int *optind, int argc) |
| { |
| if (option && strcmp(option, "!") == 0) { |
| if (*invert) |
| exit_error(PARAMETER_PROBLEM, |
| "Multiple `!' flags not allowed"); |
| *invert = TRUE; |
| if (optind) { |
| *optind = *optind+1; |
| if (argc && *optind > argc) |
| exit_error(PARAMETER_PROBLEM, |
| "no argument following `!'"); |
| } |
| |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| /* |
| * All functions starting with "parse" should succeed, otherwise |
| * the program fails. |
| * Most routines return pointers to static data that may change |
| * between calls to the same or other routines with a few exceptions: |
| * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask" |
| * return global static data. |
| */ |
| |
| /* Christophe Burki wants `-p 6' to imply `-m tcp'. */ |
| static struct ip6tables_match * |
| find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup, struct ip6tables_rule_match **matches) |
| { |
| unsigned int proto; |
| |
| if (string_to_number(pname, 0, 255, &proto) != -1) { |
| char *protoname = proto_to_name(proto, nolookup); |
| |
| if (protoname) |
| return find_match(protoname, tryload, matches); |
| } else |
| return find_match(pname, tryload, matches); |
| |
| return NULL; |
| } |
| |
| u_int16_t |
| parse_protocol(const char *s) |
| { |
| unsigned int proto; |
| |
| if (string_to_number(s, 0, 255, &proto) == -1) { |
| struct protoent *pent; |
| |
| /* first deal with the special case of 'all' to prevent |
| * people from being able to redefine 'all' in nsswitch |
| * and/or provoke expensive [not working] ldap/nis/... |
| * lookups */ |
| if (!strcmp(s, "all")) |
| return 0; |
| |
| if ((pent = getprotobyname(s))) |
| proto = pent->p_proto; |
| else { |
| unsigned int i; |
| for (i = 0; |
| i < sizeof(chain_protos)/sizeof(struct pprot); |
| i++) { |
| if (strcmp(s, chain_protos[i].name) == 0) { |
| proto = chain_protos[i].num; |
| break; |
| } |
| } |
| if (i == sizeof(chain_protos)/sizeof(struct pprot)) |
| exit_error(PARAMETER_PROBLEM, |
| "unknown protocol `%s' specified", |
| s); |
| } |
| } |
| |
| return (u_int16_t)proto; |
| } |
| |
| /* These are invalid numbers as upper layer protocol */ |
| static int is_exthdr(u_int16_t proto) |
| { |
| return (proto == IPPROTO_ROUTING || |
| proto == IPPROTO_FRAGMENT || |
| proto == IPPROTO_AH || |
| proto == IPPROTO_DSTOPTS); |
| } |
| |
| /* Can't be zero. */ |
| static int |
| parse_rulenumber(const char *rule) |
| { |
| unsigned int rulenum; |
| |
| if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1) |
| exit_error(PARAMETER_PROBLEM, |
| "Invalid rule number `%s'", rule); |
| |
| return rulenum; |
| } |
| |
| static const char * |
| parse_target(const char *targetname) |
| { |
| const char *ptr; |
| |
| if (strlen(targetname) < 1) |
| exit_error(PARAMETER_PROBLEM, |
| "Invalid target name (too short)"); |
| |
| if (strlen(targetname)+1 > sizeof(ip6t_chainlabel)) |
| exit_error(PARAMETER_PROBLEM, |
| "Invalid target name `%s' (%u chars max)", |
| targetname, (unsigned int)sizeof(ip6t_chainlabel)-1); |
| |
| for (ptr = targetname; *ptr; ptr++) |
| if (isspace(*ptr)) |
| exit_error(PARAMETER_PROBLEM, |
| "Invalid target name `%s'", targetname); |
| return targetname; |
| } |
| |
| static void |
| set_option(unsigned int *options, unsigned int option, u_int8_t *invflg, |
| int invert) |
| { |
| if (*options & option) |
| exit_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed", |
| opt2char(option)); |
| *options |= option; |
| |
| if (invert) { |
| unsigned int i; |
| for (i = 0; 1 << i != option; i++); |
| |
| if (!inverse_for_options[i]) |
| exit_error(PARAMETER_PROBLEM, |
| "cannot have ! before -%c", |
| opt2char(option)); |
| *invflg |= inverse_for_options[i]; |
| } |
| } |
| |
| static struct option * |
| merge_options(struct option *oldopts, const struct option *newopts, |
| unsigned int *option_offset) |
| { |
| unsigned int num_old, num_new, i; |
| struct option *merge; |
| |
| if (newopts == NULL) |
| return oldopts; |
| |
| for (num_old = 0; oldopts[num_old].name; num_old++); |
| for (num_new = 0; newopts[num_new].name; num_new++); |
| |
| global_option_offset += OPTION_OFFSET; |
| *option_offset = global_option_offset; |
| |
| merge = malloc(sizeof(struct option) * (num_new + num_old + 1)); |
| memcpy(merge, oldopts, num_old * sizeof(struct option)); |
| free_opts(0); /* Release previous options merged if any */ |
| for (i = 0; i < num_new; i++) { |
| merge[num_old + i] = newopts[i]; |
| merge[num_old + i].val += *option_offset; |
| } |
| memset(merge + num_old + num_new, 0, sizeof(struct option)); |
| |
| return merge; |
| } |
| |
| void register_match6(struct ip6tables_match *me) |
| { |
| me->family = AF_INET6; |
| xtables_register_match(me); |
| } |
| |
| void register_target6(struct ip6tables_target *me) |
| { |
| me->family = AF_INET6; |
| xtables_register_target(me); |
| } |
| |
| static void |
| print_num(u_int64_t number, unsigned int format) |
| { |
| if (format & FMT_KILOMEGAGIGA) { |
| if (number > 99999) { |
| number = (number + 500) / 1000; |
| if (number > 9999) { |
| number = (number + 500) / 1000; |
| if (number > 9999) { |
| number = (number + 500) / 1000; |
| if (number > 9999) { |
| number = (number + 500) / 1000; |
| printf(FMT("%4lluT ","%lluT "), (unsigned long long)number); |
| } |
| else printf(FMT("%4lluG ","%lluG "), (unsigned long long)number); |
| } |
| else printf(FMT("%4lluM ","%lluM "), (unsigned long long)number); |
| } else |
| printf(FMT("%4lluK ","%lluK "), (unsigned long long)number); |
| } else |
| printf(FMT("%5llu ","%llu "), (unsigned long long)number); |
| } else |
| printf(FMT("%8llu ","%llu "), (unsigned long long)number); |
| } |
| |
| |
| static void |
| print_header(unsigned int format, const char *chain, ip6tc_handle_t *handle) |
| { |
| struct ip6t_counters counters; |
| const char *pol = ip6tc_get_policy(chain, &counters, handle); |
| printf("Chain %s", chain); |
| if (pol) { |
| printf(" (policy %s", pol); |
| if (!(format & FMT_NOCOUNTS)) { |
| fputc(' ', stdout); |
| print_num(counters.pcnt, (format|FMT_NOTABLE)); |
| fputs("packets, ", stdout); |
| print_num(counters.bcnt, (format|FMT_NOTABLE)); |
| fputs("bytes", stdout); |
| } |
| printf(")\n"); |
| } else { |
| unsigned int refs; |
| if (!ip6tc_get_references(&refs, chain, handle)) |
| printf(" (ERROR obtaining refs)\n"); |
| else |
| printf(" (%u references)\n", refs); |
| } |
| |
| if (format & FMT_LINENUMBERS) |
| printf(FMT("%-4s ", "%s "), "num"); |
| if (!(format & FMT_NOCOUNTS)) { |
| if (format & FMT_KILOMEGAGIGA) { |
| printf(FMT("%5s ","%s "), "pkts"); |
| printf(FMT("%5s ","%s "), "bytes"); |
| } else { |
| printf(FMT("%8s ","%s "), "pkts"); |
| printf(FMT("%10s ","%s "), "bytes"); |
| } |
| } |
| if (!(format & FMT_NOTARGET)) |
| printf(FMT("%-9s ","%s "), "target"); |
| fputs(" prot ", stdout); |
| if (format & FMT_OPTIONS) |
| fputs("opt", stdout); |
| if (format & FMT_VIA) { |
| printf(FMT(" %-6s ","%s "), "in"); |
| printf(FMT("%-6s ","%s "), "out"); |
| } |
| printf(FMT(" %-19s ","%s "), "source"); |
| printf(FMT(" %-19s "," %s "), "destination"); |
| printf("\n"); |
| } |
| |
| |
| static int |
| print_match(const struct ip6t_entry_match *m, |
| const struct ip6t_ip6 *ip, |
| int numeric) |
| { |
| struct ip6tables_match *match = find_match(m->u.user.name, TRY_LOAD, NULL); |
| |
| if (match) { |
| if (match->print) |
| match->print(ip, m, numeric); |
| else |
| printf("%s ", match->name); |
| } else { |
| if (m->u.user.name[0]) |
| printf("UNKNOWN match `%s' ", m->u.user.name); |
| } |
| /* Don't stop iterating. */ |
| return 0; |
| } |
| |
| /* e is called `fw' here for hysterical raisins */ |
| static void |
| print_firewall(const struct ip6t_entry *fw, |
| const char *targname, |
| unsigned int num, |
| unsigned int format, |
| const ip6tc_handle_t handle) |
| { |
| struct ip6tables_target *target = NULL; |
| const struct ip6t_entry_target *t; |
| u_int8_t flags; |
| char buf[BUFSIZ]; |
| |
| if (!ip6tc_is_chain(targname, handle)) |
| target = find_target(targname, TRY_LOAD); |
| else |
| target = find_target(IP6T_STANDARD_TARGET, LOAD_MUST_SUCCEED); |
| |
| t = ip6t_get_target((struct ip6t_entry *)fw); |
| flags = fw->ipv6.flags; |
| |
| if (format & FMT_LINENUMBERS) |
| printf(FMT("%-4u ", "%u "), num+1); |
| |
| if (!(format & FMT_NOCOUNTS)) { |
| print_num(fw->counters.pcnt, format); |
| print_num(fw->counters.bcnt, format); |
| } |
| |
| if (!(format & FMT_NOTARGET)) |
| printf(FMT("%-9s ", "%s "), targname); |
| |
| fputc(fw->ipv6.invflags & IP6T_INV_PROTO ? '!' : ' ', stdout); |
| { |
| char *pname = proto_to_name(fw->ipv6.proto, format&FMT_NUMERIC); |
| if (pname) |
| printf(FMT("%-5s", "%s "), pname); |
| else |
| printf(FMT("%-5hu", "%hu "), fw->ipv6.proto); |
| } |
| |
| if (format & FMT_OPTIONS) { |
| if (format & FMT_NOTABLE) |
| fputs("opt ", stdout); |
| fputc(' ', stdout); /* Invert flag of FRAG */ |
| fputc(' ', stdout); /* -f */ |
| fputc(' ', stdout); |
| } |
| |
| if (format & FMT_VIA) { |
| char iface[IFNAMSIZ+2]; |
| |
| if (fw->ipv6.invflags & IP6T_INV_VIA_IN) { |
| iface[0] = '!'; |
| iface[1] = '\0'; |
| } |
| else iface[0] = '\0'; |
| |
| if (fw->ipv6.iniface[0] != '\0') { |
| strcat(iface, fw->ipv6.iniface); |
| } |
| else if (format & FMT_NUMERIC) strcat(iface, "*"); |
| else strcat(iface, "any"); |
| printf(FMT(" %-6s ","in %s "), iface); |
| |
| if (fw->ipv6.invflags & IP6T_INV_VIA_OUT) { |
| iface[0] = '!'; |
| iface[1] = '\0'; |
| } |
| else iface[0] = '\0'; |
| |
| if (fw->ipv6.outiface[0] != '\0') { |
| strcat(iface, fw->ipv6.outiface); |
| } |
| else if (format & FMT_NUMERIC) strcat(iface, "*"); |
| else strcat(iface, "any"); |
| printf(FMT("%-6s ","out %s "), iface); |
| } |
| |
| fputc(fw->ipv6.invflags & IP6T_INV_SRCIP ? '!' : ' ', stdout); |
| if (!memcmp(&fw->ipv6.smsk, &in6addr_any, sizeof in6addr_any) |
| && !(format & FMT_NUMERIC)) |
| printf(FMT("%-19s ","%s "), "anywhere"); |
| else { |
| if (format & FMT_NUMERIC) |
| sprintf(buf, "%s", ip6addr_to_numeric(&fw->ipv6.src)); |
| else |
| sprintf(buf, "%s", ip6addr_to_anyname(&fw->ipv6.src)); |
| strcat(buf, ip6mask_to_numeric(&fw->ipv6.smsk)); |
| printf(FMT("%-19s ","%s "), buf); |
| } |
| |
| fputc(fw->ipv6.invflags & IP6T_INV_DSTIP ? '!' : ' ', stdout); |
| if (!memcmp(&fw->ipv6.dmsk, &in6addr_any, sizeof in6addr_any) |
| && !(format & FMT_NUMERIC)) |
| printf(FMT("%-19s","-> %s"), "anywhere"); |
| else { |
| if (format & FMT_NUMERIC) |
| sprintf(buf, "%s", ip6addr_to_numeric(&fw->ipv6.dst)); |
| else |
| sprintf(buf, "%s", ip6addr_to_anyname(&fw->ipv6.dst)); |
| strcat(buf, ip6mask_to_numeric(&fw->ipv6.dmsk)); |
| printf(FMT("%-19s","-> %s"), buf); |
| } |
| |
| if (format & FMT_NOTABLE) |
| fputs(" ", stdout); |
| |
| IP6T_MATCH_ITERATE(fw, print_match, &fw->ipv6, format & FMT_NUMERIC); |
| |
| if (target) { |
| if (target->print) |
| /* Print the target information. */ |
| target->print(&fw->ipv6, t, format & FMT_NUMERIC); |
| } else if (t->u.target_size != sizeof(*t)) |
| printf("[%u bytes of unknown target data] ", |
| (unsigned int)(t->u.target_size - sizeof(*t))); |
| |
| if (!(format & FMT_NONEWLINE)) |
| fputc('\n', stdout); |
| } |
| |
| static void |
| print_firewall_line(const struct ip6t_entry *fw, |
| const ip6tc_handle_t h) |
| { |
| struct ip6t_entry_target *t; |
| |
| t = ip6t_get_target((struct ip6t_entry *)fw); |
| print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h); |
| } |
| |
| static int |
| append_entry(const ip6t_chainlabel chain, |
| struct ip6t_entry *fw, |
| unsigned int nsaddrs, |
| const struct in6_addr saddrs[], |
| unsigned int ndaddrs, |
| const struct in6_addr daddrs[], |
| int verbose, |
| ip6tc_handle_t *handle) |
| { |
| unsigned int i, j; |
| int ret = 1; |
| |
| for (i = 0; i < nsaddrs; i++) { |
| fw->ipv6.src = saddrs[i]; |
| for (j = 0; j < ndaddrs; j++) { |
| fw->ipv6.dst = daddrs[j]; |
| if (verbose) |
| print_firewall_line(fw, *handle); |
| ret &= ip6tc_append_entry(chain, fw, handle); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int |
| replace_entry(const ip6t_chainlabel chain, |
| struct ip6t_entry *fw, |
| unsigned int rulenum, |
| const struct in6_addr *saddr, |
| const struct in6_addr *daddr, |
| int verbose, |
| ip6tc_handle_t *handle) |
| { |
| fw->ipv6.src = *saddr; |
| fw->ipv6.dst = *daddr; |
| |
| if (verbose) |
| print_firewall_line(fw, *handle); |
| return ip6tc_replace_entry(chain, fw, rulenum, handle); |
| } |
| |
| static int |
| insert_entry(const ip6t_chainlabel chain, |
| struct ip6t_entry *fw, |
| unsigned int rulenum, |
| unsigned int nsaddrs, |
| const struct in6_addr saddrs[], |
| unsigned int ndaddrs, |
| const struct in6_addr daddrs[], |
| int verbose, |
| ip6tc_handle_t *handle) |
| { |
| unsigned int i, j; |
| int ret = 1; |
| |
| for (i = 0; i < nsaddrs; i++) { |
| fw->ipv6.src = saddrs[i]; |
| for (j = 0; j < ndaddrs; j++) { |
| fw->ipv6.dst = daddrs[j]; |
| if (verbose) |
| print_firewall_line(fw, *handle); |
| ret &= ip6tc_insert_entry(chain, fw, rulenum, handle); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static unsigned char * |
| make_delete_mask(struct ip6t_entry *fw, struct ip6tables_rule_match *matches) |
| { |
| /* Establish mask for comparison */ |
| unsigned int size; |
| struct ip6tables_rule_match *matchp; |
| unsigned char *mask, *mptr; |
| |
| size = sizeof(struct ip6t_entry); |
| for (matchp = matches; matchp; matchp = matchp->next) |
| size += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; |
| |
| mask = fw_calloc(1, size |
| + IP6T_ALIGN(sizeof(struct ip6t_entry_target)) |
| + xtables_targets->size); |
| |
| memset(mask, 0xFF, sizeof(struct ip6t_entry)); |
| mptr = mask + sizeof(struct ip6t_entry); |
| |
| for (matchp = matches; matchp; matchp = matchp->next) { |
| memset(mptr, 0xFF, |
| IP6T_ALIGN(sizeof(struct ip6t_entry_match)) |
| + matchp->match->userspacesize); |
| mptr += IP6T_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; |
| } |
| |
| memset(mptr, 0xFF, |
| IP6T_ALIGN(sizeof(struct ip6t_entry_target)) |
| + xtables_targets->userspacesize); |
| |
| return mask; |
| } |
| |
| static int |
| delete_entry(const ip6t_chainlabel chain, |
| struct ip6t_entry *fw, |
| unsigned int nsaddrs, |
| const struct in6_addr saddrs[], |
| unsigned int ndaddrs, |
| const struct in6_addr daddrs[], |
| int verbose, |
| ip6tc_handle_t *handle, |
| struct ip6tables_rule_match *matches) |
| { |
| unsigned int i, j; |
| int ret = 1; |
| unsigned char *mask; |
| |
| mask = make_delete_mask(fw, matches); |
| for (i = 0; i < nsaddrs; i++) { |
| fw->ipv6.src = saddrs[i]; |
| for (j = 0; j < ndaddrs; j++) { |
| fw->ipv6.dst = daddrs[j]; |
| if (verbose) |
| print_firewall_line(fw, *handle); |
| ret &= ip6tc_delete_entry(chain, fw, mask, handle); |
| } |
| } |
| free(mask); |
| |
| return ret; |
| } |
| |
| int |
| for_each_chain(int (*fn)(const ip6t_chainlabel, int, ip6tc_handle_t *), |
| int verbose, int builtinstoo, ip6tc_handle_t *handle) |
| { |
| int ret = 1; |
| const char *chain; |
| char *chains; |
| unsigned int i, chaincount = 0; |
| |
| chain = ip6tc_first_chain(handle); |
| while (chain) { |
| chaincount++; |
| chain = ip6tc_next_chain(handle); |
| } |
| |
| chains = fw_malloc(sizeof(ip6t_chainlabel) * chaincount); |
| i = 0; |
| chain = ip6tc_first_chain(handle); |
| while (chain) { |
| strcpy(chains + i*sizeof(ip6t_chainlabel), chain); |
| i++; |
| chain = ip6tc_next_chain(handle); |
| } |
| |
| for (i = 0; i < chaincount; i++) { |
| if (!builtinstoo |
| && ip6tc_builtin(chains + i*sizeof(ip6t_chainlabel), |
| *handle) == 1) |
| continue; |
| ret &= fn(chains + i*sizeof(ip6t_chainlabel), verbose, handle); |
| } |
| |
| free(chains); |
| return ret; |
| } |
| |
| int |
| flush_entries(const ip6t_chainlabel chain, int verbose, |
| ip6tc_handle_t *handle) |
| { |
| if (!chain) |
| return for_each_chain(flush_entries, verbose, 1, handle); |
| |
| if (verbose) |
| fprintf(stdout, "Flushing chain `%s'\n", chain); |
| return ip6tc_flush_entries(chain, handle); |
| } |
| |
| static int |
| zero_entries(const ip6t_chainlabel chain, int verbose, |
| ip6tc_handle_t *handle) |
| { |
| if (!chain) |
| return for_each_chain(zero_entries, verbose, 1, handle); |
| |
| if (verbose) |
| fprintf(stdout, "Zeroing chain `%s'\n", chain); |
| return ip6tc_zero_entries(chain, handle); |
| } |
| |
| int |
| delete_chain(const ip6t_chainlabel chain, int verbose, |
| ip6tc_handle_t *handle) |
| { |
| if (!chain) |
| return for_each_chain(delete_chain, verbose, 0, handle); |
| |
| if (verbose) |
| fprintf(stdout, "Deleting chain `%s'\n", chain); |
| return ip6tc_delete_chain(chain, handle); |
| } |
| |
| static int |
| list_entries(const ip6t_chainlabel chain, int verbose, int numeric, |
| int expanded, int linenumbers, ip6tc_handle_t *handle) |
| { |
| int found = 0; |
| unsigned int format; |
| const char *this; |
| |
| format = FMT_OPTIONS; |
| if (!verbose) |
| format |= FMT_NOCOUNTS; |
| else |
| format |= FMT_VIA; |
| |
| if (numeric) |
| format |= FMT_NUMERIC; |
| |
| if (!expanded) |
| format |= FMT_KILOMEGAGIGA; |
| |
| if (linenumbers) |
| format |= FMT_LINENUMBERS; |
| |
| for (this = ip6tc_first_chain(handle); |
| this; |
| this = ip6tc_next_chain(handle)) { |
| const struct ip6t_entry *i; |
| unsigned int num; |
| |
| if (chain && strcmp(chain, this) != 0) |
| continue; |
| |
| if (found) printf("\n"); |
| |
| print_header(format, this, handle); |
| i = ip6tc_first_rule(this, handle); |
| |
| num = 0; |
| while (i) { |
| print_firewall(i, |
| ip6tc_get_target(i, handle), |
| num++, |
| format, |
| *handle); |
| i = ip6tc_next_rule(i, handle); |
| } |
| found = 1; |
| } |
| |
| errno = ENOENT; |
| return found; |
| } |
| |
| static struct ip6t_entry * |
| generate_entry(const struct ip6t_entry *fw, |
| struct ip6tables_rule_match *matches, |
| struct ip6t_entry_target *target) |
| { |
| unsigned int size; |
| struct ip6tables_rule_match *matchp; |
| struct ip6t_entry *e; |
| |
| size = sizeof(struct ip6t_entry); |
| for (matchp = matches; matchp; matchp = matchp->next) |
| size += matchp->match->m->u.match_size; |
| |
| e = fw_malloc(size + target->u.target_size); |
| *e = *fw; |
| e->target_offset = size; |
| e->next_offset = size + target->u.target_size; |
| |
| size = 0; |
| for (matchp = matches; matchp; matchp = matchp->next) { |
| memcpy(e->elems + size, matchp->match->m, matchp->match->m->u.match_size); |
| size += matchp->match->m->u.match_size; |
| } |
| memcpy(e->elems + size, target, target->u.target_size); |
| |
| return e; |
| } |
| |
| void clear_rule_matches(struct ip6tables_rule_match **matches) |
| { |
| struct ip6tables_rule_match *matchp, *tmp; |
| |
| for (matchp = *matches; matchp;) { |
| tmp = matchp->next; |
| if (matchp->match->m) { |
| free(matchp->match->m); |
| matchp->match->m = NULL; |
| } |
| if (matchp->match == matchp->match->next) { |
| free(matchp->match); |
| matchp->match = NULL; |
| } |
| free(matchp); |
| matchp = tmp; |
| } |
| |
| *matches = NULL; |
| } |
| |
| static void set_revision(char *name, u_int8_t revision) |
| { |
| /* Old kernel sources don't have ".revision" field, |
| but we stole a byte from name. */ |
| name[IP6T_FUNCTION_MAXNAMELEN - 2] = '\0'; |
| name[IP6T_FUNCTION_MAXNAMELEN - 1] = revision; |
| } |
| |
| int do_command6(int argc, char *argv[], char **table, ip6tc_handle_t *handle) |
| { |
| struct ip6t_entry fw, *e = NULL; |
| int invert = 0; |
| unsigned int nsaddrs = 0, ndaddrs = 0; |
| struct in6_addr *saddrs = NULL, *daddrs = NULL; |
| |
| int c, verbose = 0; |
| const char *chain = NULL; |
| const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL; |
| const char *policy = NULL, *newname = NULL; |
| unsigned int rulenum = 0, options = 0, command = 0; |
| const char *pcnt = NULL, *bcnt = NULL; |
| int ret = 1; |
| struct ip6tables_match *m; |
| struct ip6tables_rule_match *matches = NULL; |
| struct ip6tables_rule_match *matchp; |
| struct ip6tables_target *target = NULL; |
| struct ip6tables_target *t; |
| const char *jumpto = ""; |
| char *protocol = NULL; |
| int proto_used = 0; |
| unsigned long long cnt; |
| |
| memset(&fw, 0, sizeof(fw)); |
| |
| /* re-set optind to 0 in case do_command gets called |
| * a second time */ |
| optind = 0; |
| |
| /* clear mflags in case do_command gets called a second time |
| * (we clear the global list of all matches for security)*/ |
| for (m = xtables_matches; m; m = m->next) |
| m->mflags = 0; |
| |
| for (t = xtables_targets; t; t = t->next) { |
| t->tflags = 0; |
| t->used = 0; |
| } |
| |
| /* Suppress error messages: we may add new options if we |
| demand-load a protocol. */ |
| opterr = 0; |
| |
| while ((c = getopt_long(argc, argv, |
| "-A:D:R:I:L::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:", |
| opts, NULL)) != -1) { |
| switch (c) { |
| /* |
| * Command selection |
| */ |
| case 'A': |
| add_command(&command, CMD_APPEND, CMD_NONE, |
| invert); |
| chain = optarg; |
| break; |
| |
| case 'D': |
| add_command(&command, CMD_DELETE, CMD_NONE, |
| invert); |
| chain = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') { |
| rulenum = parse_rulenumber(argv[optind++]); |
| command = CMD_DELETE_NUM; |
| } |
| break; |
| |
| case 'R': |
| add_command(&command, CMD_REPLACE, CMD_NONE, |
| invert); |
| chain = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| rulenum = parse_rulenumber(argv[optind++]); |
| else |
| exit_error(PARAMETER_PROBLEM, |
| "-%c requires a rule number", |
| cmd2char(CMD_REPLACE)); |
| break; |
| |
| case 'I': |
| add_command(&command, CMD_INSERT, CMD_NONE, |
| invert); |
| chain = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| rulenum = parse_rulenumber(argv[optind++]); |
| else rulenum = 1; |
| break; |
| |
| case 'L': |
| add_command(&command, CMD_LIST, CMD_ZERO, |
| invert); |
| if (optarg) chain = optarg; |
| else if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| chain = argv[optind++]; |
| break; |
| |
| case 'F': |
| add_command(&command, CMD_FLUSH, CMD_NONE, |
| invert); |
| if (optarg) chain = optarg; |
| else if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| chain = argv[optind++]; |
| break; |
| |
| case 'Z': |
| add_command(&command, CMD_ZERO, CMD_LIST, |
| invert); |
| if (optarg) chain = optarg; |
| else if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| chain = argv[optind++]; |
| break; |
| |
| case 'N': |
| if (optarg && (*optarg == '-' || *optarg == '!')) |
| exit_error(PARAMETER_PROBLEM, |
| "chain name not allowed to start " |
| "with `%c'\n", *optarg); |
| if (find_target(optarg, TRY_LOAD)) |
| exit_error(PARAMETER_PROBLEM, |
| "chain name may not clash " |
| "with target name\n"); |
| add_command(&command, CMD_NEW_CHAIN, CMD_NONE, |
| invert); |
| chain = optarg; |
| break; |
| |
| case 'X': |
| add_command(&command, CMD_DELETE_CHAIN, CMD_NONE, |
| invert); |
| if (optarg) chain = optarg; |
| else if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| chain = argv[optind++]; |
| break; |
| |
| case 'E': |
| add_command(&command, CMD_RENAME_CHAIN, CMD_NONE, |
| invert); |
| chain = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| newname = argv[optind++]; |
| else |
| exit_error(PARAMETER_PROBLEM, |
| "-%c requires old-chain-name and " |
| "new-chain-name", |
| cmd2char(CMD_RENAME_CHAIN)); |
| break; |
| |
| case 'P': |
| add_command(&command, CMD_SET_POLICY, CMD_NONE, |
| invert); |
| chain = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| policy = argv[optind++]; |
| else |
| exit_error(PARAMETER_PROBLEM, |
| "-%c requires a chain and a policy", |
| cmd2char(CMD_SET_POLICY)); |
| break; |
| |
| case 'h': |
| if (!optarg) |
| optarg = argv[optind]; |
| |
| /* ip6tables -p icmp -h */ |
| if (!matches && protocol) |
| find_match(protocol, TRY_LOAD, &matches); |
| |
| exit_printhelp(matches); |
| |
| /* |
| * Option selection |
| */ |
| case 'p': |
| check_inverse(optarg, &invert, &optind, argc); |
| set_option(&options, OPT_PROTOCOL, &fw.ipv6.invflags, |
| invert); |
| |
| /* Canonicalize into lower case */ |
| for (protocol = argv[optind-1]; *protocol; protocol++) |
| *protocol = tolower(*protocol); |
| |
| protocol = argv[optind-1]; |
| fw.ipv6.proto = parse_protocol(protocol); |
| fw.ipv6.flags |= IP6T_F_PROTO; |
| |
| if (fw.ipv6.proto == 0 |
| && (fw.ipv6.invflags & IP6T_INV_PROTO)) |
| exit_error(PARAMETER_PROBLEM, |
| "rule would never match protocol"); |
| |
| if (is_exthdr(fw.ipv6.proto) |
| && (fw.ipv6.invflags & IP6T_INV_PROTO) == 0) |
| fprintf(stderr, |
| "Warning: never matched protocol: %s. " |
| "use extension match instead.\n", |
| protocol); |
| break; |
| |
| case 's': |
| check_inverse(optarg, &invert, &optind, argc); |
| set_option(&options, OPT_SOURCE, &fw.ipv6.invflags, |
| invert); |
| shostnetworkmask = argv[optind-1]; |
| break; |
| |
| case 'd': |
| check_inverse(optarg, &invert, &optind, argc); |
| set_option(&options, OPT_DESTINATION, &fw.ipv6.invflags, |
| invert); |
| dhostnetworkmask = argv[optind-1]; |
| break; |
| |
| case 'j': |
| set_option(&options, OPT_JUMP, &fw.ipv6.invflags, |
| invert); |
| jumpto = parse_target(optarg); |
| /* TRY_LOAD (may be chain name) */ |
| target = find_target(jumpto, TRY_LOAD); |
| |
| if (target) { |
| size_t size; |
| |
| size = IP6T_ALIGN(sizeof(struct ip6t_entry_target)) |
| + target->size; |
| |
| target->t = fw_calloc(1, size); |
| target->t->u.target_size = size; |
| strcpy(target->t->u.user.name, jumpto); |
| if (target->init != NULL) |
| target->init(target->t); |
| opts = merge_options(opts, target->extra_opts, &target->option_offset); |
| } |
| break; |
| |
| |
| case 'i': |
| check_inverse(optarg, &invert, &optind, argc); |
| set_option(&options, OPT_VIANAMEIN, &fw.ipv6.invflags, |
| invert); |
| parse_interface(argv[optind-1], |
| fw.ipv6.iniface, |
| fw.ipv6.iniface_mask); |
| break; |
| |
| case 'o': |
| check_inverse(optarg, &invert, &optind, argc); |
| set_option(&options, OPT_VIANAMEOUT, &fw.ipv6.invflags, |
| invert); |
| parse_interface(argv[optind-1], |
| fw.ipv6.outiface, |
| fw.ipv6.outiface_mask); |
| break; |
| |
| case 'v': |
| if (!verbose) |
| set_option(&options, OPT_VERBOSE, |
| &fw.ipv6.invflags, invert); |
| verbose++; |
| break; |
| |
| case 'm': { |
| size_t size; |
| |
| if (invert) |
| exit_error(PARAMETER_PROBLEM, |
| "unexpected ! flag before --match"); |
| |
| m = find_match(optarg, LOAD_MUST_SUCCEED, &matches); |
| size = IP6T_ALIGN(sizeof(struct ip6t_entry_match)) |
| + m->size; |
| m->m = fw_calloc(1, size); |
| m->m->u.match_size = size; |
| strcpy(m->m->u.user.name, m->name); |
| set_revision(m->m->u.user.name, m->revision); |
| if (m->init != NULL) |
| m->init(m->m); |
| if (m != m->next) |
| /* Merge options for non-cloned matches */ |
| opts = merge_options(opts, m->extra_opts, &m->option_offset); |
| } |
| break; |
| |
| case 'n': |
| set_option(&options, OPT_NUMERIC, &fw.ipv6.invflags, |
| invert); |
| break; |
| |
| case 't': |
| if (invert) |
| exit_error(PARAMETER_PROBLEM, |
| "unexpected ! flag before --table"); |
| *table = argv[optind-1]; |
| break; |
| |
| case 'x': |
| set_option(&options, OPT_EXPANDED, &fw.ipv6.invflags, |
| invert); |
| break; |
| |
| case 'V': |
| if (invert) |
| printf("Not %s ;-)\n", program_version); |
| else |
| printf("%s v%s\n", |
| program_name, program_version); |
| exit(0); |
| |
| case '0': |
| set_option(&options, OPT_LINENUMBERS, &fw.ipv6.invflags, |
| invert); |
| break; |
| |
| case 'M': |
| modprobe = optarg; |
| break; |
| |
| case 'c': |
| |
| set_option(&options, OPT_COUNTERS, &fw.ipv6.invflags, |
| invert); |
| pcnt = optarg; |
| if (optind < argc && argv[optind][0] != '-' |
| && argv[optind][0] != '!') |
| bcnt = argv[optind++]; |
| else |
| exit_error(PARAMETER_PROBLEM, |
| "-%c requires packet and byte counter", |
| opt2char(OPT_COUNTERS)); |
| |
| if (sscanf(pcnt, "%llu", (unsigned long long *)&cnt) != 1) |
| exit_error(PARAMETER_PROBLEM, |
| "-%c packet counter not numeric", |
| opt2char(OPT_COUNTERS)); |
| fw.counters.pcnt = cnt; |
| |
| if (sscanf(bcnt, "%llu", (unsigned long long *)&cnt) != 1) |
| exit_error(PARAMETER_PROBLEM, |
| "-%c byte counter not numeric", |
| opt2char(OPT_COUNTERS)); |
| fw.counters.bcnt = cnt; |
| |
| break; |
| |
| |
| case 1: /* non option */ |
| if (optarg[0] == '!' && optarg[1] == '\0') { |
| if (invert) |
| exit_error(PARAMETER_PROBLEM, |
| "multiple consecutive ! not" |
| " allowed"); |
| invert = TRUE; |
| optarg[0] = '\0'; |
| continue; |
| } |
| fprintf(stderr, "Bad argument `%s'\n", optarg); |
| exit_tryhelp(2); |
| |
| default: |
| if (!target |
| || !(target->parse(c - target->option_offset, |
| argv, invert, |
| &target->tflags, |
| &fw, &target->t))) { |
| for (matchp = matches; matchp; matchp = matchp->next) { |
| if (matchp->completed) |
| continue; |
| if (matchp->match->parse(c - matchp->match->option_offset, |
| argv, invert, |
| &matchp->match->mflags, |
| &fw, |
| &matchp->match->m)) |
| break; |
| } |
| m = matchp ? matchp->match : NULL; |
| |
| /* If you listen carefully, you can |
| actually hear this code suck. */ |
| |
| /* some explanations (after four different bugs |
| * in 3 different releases): If we encounter a |
| * parameter, that has not been parsed yet, |
| * it's not an option of an explicitly loaded |
| * match or a target. However, we support |
| * implicit loading of the protocol match |
| * extension. '-p tcp' means 'l4 proto 6' and |
| * at the same time 'load tcp protocol match on |
| * demand if we specify --dport'. |
| * |
| * To make this work, we need to make sure: |
| * - the parameter has not been parsed by |
| * a match (m above) |
| * - a protocol has been specified |
| * - the protocol extension has not been |
| * loaded yet, or is loaded and unused |
| * [think of ip6tables-restore!] |
| * - the protocol extension can be successively |
| * loaded |
| */ |
| if (m == NULL |
| && protocol |
| && (!find_proto(protocol, DONT_LOAD, |
| options&OPT_NUMERIC, NULL) |
| || (find_proto(protocol, DONT_LOAD, |
| options&OPT_NUMERIC, NULL) |
| && (proto_used == 0)) |
| ) |
| && (m = find_proto(protocol, TRY_LOAD, |
| options&OPT_NUMERIC, &matches))) { |
| /* Try loading protocol */ |
| size_t size; |
| |
| proto_used = 1; |
| |
| size = IP6T_ALIGN(sizeof(struct ip6t_entry_match)) |
| + m->size; |
| |
| m->m = fw_calloc(1, size); |
| m->m->u.match_size = size; |
| strcpy(m->m->u.user.name, m->name); |
| set_revision(m->m->u.user.name, |
| m->revision); |
| if (m->init != NULL) |
| m->init(m->m); |
| |
| opts = merge_options(opts, |
| m->extra_opts, &m->option_offset); |
| |
| optind--; |
| continue; |
| } |
| |
| if (!m) |
| exit_error(PARAMETER_PROBLEM, |
| "Unknown arg `%s'", |
| argv[optind-1]); |
| } |
| } |
| invert = FALSE; |
| } |
| |
| for (matchp = matches; matchp; matchp = matchp->next) |
| if (matchp->match->final_check != NULL) |
| matchp->match->final_check(matchp->match->mflags); |
| |
| if (target != NULL && target->final_check != NULL) |
| target->final_check(target->tflags); |
| |
| /* Fix me: must put inverse options checking here --MN */ |
| |
| if (optind < argc) |
| exit_error(PARAMETER_PROBLEM, |
| "unknown arguments found on commandline"); |
| if (!command) |
| exit_error(PARAMETER_PROBLEM, "no command specified"); |
| if (invert) |
| exit_error(PARAMETER_PROBLEM, |
| "nothing appropriate following !"); |
| |
| if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND)) { |
| if (!(options & OPT_DESTINATION)) |
| dhostnetworkmask = "::0/0"; |
| if (!(options & OPT_SOURCE)) |
| shostnetworkmask = "::0/0"; |
| } |
| |
| if (shostnetworkmask) |
| ip6parse_hostnetworkmask(shostnetworkmask, &saddrs, |
| &fw.ipv6.smsk, &nsaddrs); |
| |
| if (dhostnetworkmask) |
| ip6parse_hostnetworkmask(dhostnetworkmask, &daddrs, |
| &fw.ipv6.dmsk, &ndaddrs); |
| |
| if ((nsaddrs > 1 || ndaddrs > 1) && |
| (fw.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP))) |
| exit_error(PARAMETER_PROBLEM, "! not allowed with multiple" |
| " source or destination IP addresses"); |
| |
| if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1)) |
| exit_error(PARAMETER_PROBLEM, "Replacement rule does not " |
| "specify a unique address"); |
| |
| generic_opt_check(command, options); |
| |
| if (chain && strlen(chain) > IP6T_FUNCTION_MAXNAMELEN) |
| exit_error(PARAMETER_PROBLEM, |
| "chain name `%s' too long (must be under %i chars)", |
| chain, IP6T_FUNCTION_MAXNAMELEN); |
| |
| /* only allocate handle if we weren't called with a handle */ |
| if (!*handle) |
| *handle = ip6tc_init(*table); |
| |
| /* try to insmod the module if iptc_init failed */ |
| if (!*handle && load_xtables_ko(modprobe, 0) != -1) |
| *handle = ip6tc_init(*table); |
| |
| if (!*handle) |
| exit_error(VERSION_PROBLEM, |
| "can't initialize ip6tables table `%s': %s", |
| *table, ip6tc_strerror(errno)); |
| |
| if (command == CMD_APPEND |
| || command == CMD_DELETE |
| || command == CMD_INSERT |
| || command == CMD_REPLACE) { |
| if (strcmp(chain, "PREROUTING") == 0 |
| || strcmp(chain, "INPUT") == 0) { |
| /* -o not valid with incoming packets. */ |
| if (options & OPT_VIANAMEOUT) |
| exit_error(PARAMETER_PROBLEM, |
| "Can't use -%c with %s\n", |
| opt2char(OPT_VIANAMEOUT), |
| chain); |
| } |
| |
| if (strcmp(chain, "POSTROUTING") == 0 |
| || strcmp(chain, "OUTPUT") == 0) { |
| /* -i not valid with outgoing packets */ |
| if (options & OPT_VIANAMEIN) |
| exit_error(PARAMETER_PROBLEM, |
| "Can't use -%c with %s\n", |
| opt2char(OPT_VIANAMEIN), |
| chain); |
| } |
| |
| if (target && ip6tc_is_chain(jumpto, *handle)) { |
| fprintf(stderr, |
| "Warning: using chain %s, not extension\n", |
| jumpto); |
| |
| if (target->t) |
| free(target->t); |
| |
| target = NULL; |
| } |
| |
| /* If they didn't specify a target, or it's a chain |
| name, use standard. */ |
| if (!target |
| && (strlen(jumpto) == 0 |
| || ip6tc_is_chain(jumpto, *handle))) { |
| size_t size; |
| |
| target = find_target(IP6T_STANDARD_TARGET, |
| LOAD_MUST_SUCCEED); |
| |
| size = sizeof(struct ip6t_entry_target) |
| + target->size; |
| target->t = fw_calloc(1, size); |
| target->t->u.target_size = size; |
| strcpy(target->t->u.user.name, jumpto); |
| if (target->init != NULL) |
| target->init(target->t); |
| } |
| |
| if (!target) { |
| /* it is no chain, and we can't load a plugin. |
| * We cannot know if the plugin is corrupt, non |
| * existant OR if the user just misspelled a |
| * chain. */ |
| find_target(jumpto, LOAD_MUST_SUCCEED); |
| } else { |
| e = generate_entry(&fw, matches, target->t); |
| free(target->t); |
| } |
| } |
| |
| switch (command) { |
| case CMD_APPEND: |
| ret = append_entry(chain, e, |
| nsaddrs, saddrs, ndaddrs, daddrs, |
| options&OPT_VERBOSE, |
| handle); |
| break; |
| case CMD_DELETE: |
| ret = delete_entry(chain, e, |
| nsaddrs, saddrs, ndaddrs, daddrs, |
| options&OPT_VERBOSE, |
| handle, matches); |
| break; |
| case CMD_DELETE_NUM: |
| ret = ip6tc_delete_num_entry(chain, rulenum - 1, handle); |
| break; |
| case CMD_REPLACE: |
| ret = replace_entry(chain, e, rulenum - 1, |
| saddrs, daddrs, options&OPT_VERBOSE, |
| handle); |
| break; |
| case CMD_INSERT: |
| ret = insert_entry(chain, e, rulenum - 1, |
| nsaddrs, saddrs, ndaddrs, daddrs, |
| options&OPT_VERBOSE, |
| handle); |
| break; |
| case CMD_LIST: |
| ret = list_entries(chain, |
| options&OPT_VERBOSE, |
| options&OPT_NUMERIC, |
| options&OPT_EXPANDED, |
| options&OPT_LINENUMBERS, |
| handle); |
| break; |
| case CMD_FLUSH: |
| ret = flush_entries(chain, options&OPT_VERBOSE, handle); |
| break; |
| case CMD_ZERO: |
| ret = zero_entries(chain, options&OPT_VERBOSE, handle); |
| break; |
| case CMD_LIST|CMD_ZERO: |
| ret = list_entries(chain, |
| options&OPT_VERBOSE, |
| options&OPT_NUMERIC, |
| options&OPT_EXPANDED, |
| options&OPT_LINENUMBERS, |
| handle); |
| if (ret) |
| ret = zero_entries(chain, |
| options&OPT_VERBOSE, handle); |
| break; |
| case CMD_NEW_CHAIN: |
| ret = ip6tc_create_chain(chain, handle); |
| break; |
| case CMD_DELETE_CHAIN: |
| ret = delete_chain(chain, options&OPT_VERBOSE, handle); |
| break; |
| case CMD_RENAME_CHAIN: |
| ret = ip6tc_rename_chain(chain, newname, handle); |
| break; |
| case CMD_SET_POLICY: |
| ret = ip6tc_set_policy(chain, policy, NULL, handle); |
| break; |
| default: |
| /* We should never reach this... */ |
| exit_tryhelp(2); |
| } |
| |
| if (verbose > 1) |
| dump_entries6(*handle); |
| |
| clear_rule_matches(&matches); |
| |
| if (e != NULL) { |
| free(e); |
| e = NULL; |
| } |
| |
| for (c = 0; c < nsaddrs; c++) |
| free(&saddrs[c]); |
| |
| for (c = 0; c < ndaddrs; c++) |
| free(&daddrs[c]); |
| |
| free_opts(1); |
| |
| return ret; |
| } |