From 033e25a3ad215ee3f5a07f0a3315f74c4abfaced Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Tue, 7 Jun 2011 14:02:37 +0200 Subject: src: move all iptables pieces into a separate directory (Unclutter top-level dir) Signed-off-by: Jan Engelhardt --- iptables/ip6tables.c | 1967 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1967 insertions(+) create mode 100644 iptables/ip6tables.c (limited to 'iptables/ip6tables.c') diff --git a/iptables/ip6tables.c b/iptables/ip6tables.c new file mode 100644 index 00000000..4df73b8d --- /dev/null +++ b/iptables/ip6tables.c @@ -0,0 +1,1967 @@ +/* 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 : + * Paul 'Rusty' Russell + * Marc Boucher + * James Morris + * Harald Welte + * Jozsef Kadlecsik + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ip6tables-multi.h" +#include "xshared.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 CMD_LIST_RULES 0x1000U +#define CMD_ZERO_NUM 0x2000U +#define CMD_CHECK 0x4000U +#define NUMBER_OF_CMD 16 +static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z', + 'Z', 'N', 'X', 'P', 'E', 'S', 'C' }; + +#define NUMBER_OF_OPT ARRAY_SIZE(optflags) +static const char optflags[] += { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', '0', 'c'}; + +static struct option original_opts[] = { + {.name = "append", .has_arg = 1, .val = 'A'}, + {.name = "delete", .has_arg = 1, .val = 'D'}, + {.name = "check" , .has_arg = 1, .val = 'C'}, + {.name = "insert", .has_arg = 1, .val = 'I'}, + {.name = "replace", .has_arg = 1, .val = 'R'}, + {.name = "list", .has_arg = 2, .val = 'L'}, + {.name = "list-rules", .has_arg = 2, .val = 'S'}, + {.name = "flush", .has_arg = 2, .val = 'F'}, + {.name = "zero", .has_arg = 2, .val = 'Z'}, + {.name = "new-chain", .has_arg = 1, .val = 'N'}, + {.name = "delete-chain", .has_arg = 2, .val = 'X'}, + {.name = "rename-chain", .has_arg = 1, .val = 'E'}, + {.name = "policy", .has_arg = 1, .val = 'P'}, + {.name = "source", .has_arg = 1, .val = 's'}, + {.name = "destination", .has_arg = 1, .val = 'd'}, + {.name = "src", .has_arg = 1, .val = 's'}, /* synonym */ + {.name = "dst", .has_arg = 1, .val = 'd'}, /* synonym */ + {.name = "protocol", .has_arg = 1, .val = 'p'}, + {.name = "in-interface", .has_arg = 1, .val = 'i'}, + {.name = "jump", .has_arg = 1, .val = 'j'}, + {.name = "table", .has_arg = 1, .val = 't'}, + {.name = "match", .has_arg = 1, .val = 'm'}, + {.name = "numeric", .has_arg = 0, .val = 'n'}, + {.name = "out-interface", .has_arg = 1, .val = 'o'}, + {.name = "verbose", .has_arg = 0, .val = 'v'}, + {.name = "exact", .has_arg = 0, .val = 'x'}, + {.name = "version", .has_arg = 0, .val = 'V'}, + {.name = "help", .has_arg = 2, .val = 'h'}, + {.name = "line-numbers", .has_arg = 0, .val = '0'}, + {.name = "modprobe", .has_arg = 1, .val = 'M'}, + {.name = "set-counters", .has_arg = 1, .val = 'c'}, + {.name = "goto", .has_arg = 1, .val = 'g'}, + {.name = "ipv4", .has_arg = 0, .val = '4'}, + {.name = "ipv6", .has_arg = 0, .val = '6'}, + {NULL}, +}; + +void ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); +struct xtables_globals ip6tables_globals = { + .option_offset = 0, + .program_version = IPTABLES_VERSION, + .orig_opts = original_opts, + .exit_err = ip6tables_exit_error, +}; + +/* 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 const 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'}, +/*ZERO_NUM*/ {'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',' '}, +/*RENAME*/ {'x','x','x','x','x',' ','x','x','x','x','x'}, +/*LIST_RULES*/{'x','x','x','x','x',' ','x','x','x','x','x'}, +/*CHECK*/ {'x',' ',' ',' ',' ',' ','x',' ',' ','x','x'}, +}; + +static const unsigned 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, +}; + +#define opts ip6tables_globals.opts +#define prog_name ip6tables_globals.program_name +#define prog_vers ip6tables_globals.program_version +/* A few hardcoded protocols for 'all' and in case the user has no + /etc/protocols */ +struct pprot { + const char *name; + uint8_t num; +}; + +static void __attribute__((noreturn)) +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", + prog_name, prog_name); + xtables_free_opts(1); + exit(status); +} + +static void +exit_printhelp(const struct xtables_rule_match *matches) +{ + printf("%s v%s\n\n" +"Usage: %s -[ACD] chain rule-specification [options]\n" +" %s -I chain [rulenum] rule-specification [options]\n" +" %s -R chain rulenum rule-specification [options]\n" +" %s -D chain rulenum [options]\n" +" %s -[LS] [chain [rulenum]] [options]\n" +" %s -[FZ] [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", + prog_name, prog_vers, prog_name, prog_name, + prog_name, prog_name, prog_name, prog_name, + prog_name, prog_name, prog_name, prog_name); + + printf( +"Commands:\n" +"Either long or short options are allowed.\n" +" --append -A chain Append to chain\n" +" --check -C chain Check for the existence of a rule\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 [rulenum]]\n" +" List the rules in a chain or all chains\n" +" --list-rules -S [chain [rulenum]]\n" +" Print the rules in a chain or all chains\n" +" --flush -F [chain] Delete all rules in chain or all chains\n" +" --zero -Z [chain [rulenum]]\n" +" 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" +" --ipv4 -4 Error (line is ignored by ip6tables-restore)\n" +" --ipv6 -6 Nothing (line is ignored by iptables-restore)\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" +#ifdef IP6T_F_GOTO +" --goto -g chain\n" +" jump to chain with no return\n" +#endif +" --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= 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_extension_helps(xtables_targets, matches); + exit(0); +} + +void +ip6tables_exit_error(enum xtables_exittype status, const char *msg, ...) +{ + va_list args; + + va_start(args, msg); + fprintf(stderr, "%s v%s: ", prog_name, prog_vers); + 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 */ + xtables_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< 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) + xtables_error(PARAMETER_PROBLEM, "unexpected '!' flag"); + if (*cmd & (~othercmds)) + xtables_error(PARAMETER_PROBLEM, "Cannot use -%c with -%c\n", + cmd2char(newcmd), cmd2char(*cmd & (~othercmds))); + *cmd |= newcmd; +} + +/* + * 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. +*/ + +/* These are invalid numbers as upper layer protocol */ +static int is_exthdr(uint16_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 (!xtables_strtoui(rule, NULL, &rulenum, 1, INT_MAX)) + xtables_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) + xtables_error(PARAMETER_PROBLEM, + "Invalid target name (too short)"); + + if (strlen(targetname) >= XT_EXTENSION_MAXNAMELEN) + xtables_error(PARAMETER_PROBLEM, + "Invalid target name `%s' (%u chars max)", + targetname, XT_EXTENSION_MAXNAMELEN - 1); + + for (ptr = targetname; *ptr; ptr++) + if (isspace(*ptr)) + xtables_error(PARAMETER_PROBLEM, + "Invalid target name `%s'", targetname); + return targetname; +} + +static void +set_option(unsigned int *options, unsigned int option, uint8_t *invflg, + int invert) +{ + if (*options & option) + xtables_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]) + xtables_error(PARAMETER_PROBLEM, + "cannot have ! before -%c", + opt2char(option)); + *invflg |= inverse_for_options[i]; + } +} + +static void +print_num(uint64_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, struct ip6tc_handle *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) +{ + const struct xtables_match *match = + xtables_find_match(m->u.user.name, XTF_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 historical reasons */ +static void +print_firewall(const struct ip6t_entry *fw, + const char *targname, + unsigned int num, + unsigned int format, + struct ip6tc_handle *const handle) +{ + const struct xtables_target *target = NULL; + const struct ip6t_entry_target *t; + char buf[BUFSIZ]; + + if (!ip6tc_is_chain(targname, handle)) + target = xtables_find_target(targname, XTF_TRY_LOAD); + else + target = xtables_find_target(IP6T_STANDARD_TARGET, + XTF_LOAD_MUST_SUCCEED); + + t = ip6t_get_target((struct ip6t_entry *)fw); + + if (format & FMT_LINENUMBERS) + printf(FMT("%-4u ", "%u "), num); + + 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); + { + const 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) + strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.src)); + else + strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.src)); + strcat(buf, xtables_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) + strcpy(buf, xtables_ip6addr_to_numeric(&fw->ipv6.dst)); + else + strcpy(buf, xtables_ip6addr_to_anyname(&fw->ipv6.dst)); + strcat(buf, xtables_ip6mask_to_numeric(&fw->ipv6.dmsk)); + printf(FMT("%-19s ","-> %s"), buf); + } + + if (format & FMT_NOTABLE) + fputs(" ", stdout); + +#ifdef IP6T_F_GOTO + if(fw->ipv6.flags & IP6T_F_GOTO) + printf("[goto] "); +#endif + + 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, + struct ip6tc_handle *const 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[], + const struct in6_addr smasks[], + unsigned int ndaddrs, + const struct in6_addr daddrs[], + const struct in6_addr dmasks[], + int verbose, + struct ip6tc_handle *handle) +{ + unsigned int i, j; + int ret = 1; + + for (i = 0; i < nsaddrs; i++) { + fw->ipv6.src = saddrs[i]; + fw->ipv6.smsk = smasks[i]; + for (j = 0; j < ndaddrs; j++) { + fw->ipv6.dst = daddrs[j]; + fw->ipv6.dmsk = dmasks[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 *smask, + const struct in6_addr *daddr, const struct in6_addr *dmask, + int verbose, + struct ip6tc_handle *handle) +{ + fw->ipv6.src = *saddr; + fw->ipv6.dst = *daddr; + fw->ipv6.smsk = *smask; + fw->ipv6.dmsk = *dmask; + + 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[], + const struct in6_addr smasks[], + unsigned int ndaddrs, + const struct in6_addr daddrs[], + const struct in6_addr dmasks[], + int verbose, + struct ip6tc_handle *handle) +{ + unsigned int i, j; + int ret = 1; + + for (i = 0; i < nsaddrs; i++) { + fw->ipv6.src = saddrs[i]; + fw->ipv6.smsk = smasks[i]; + for (j = 0; j < ndaddrs; j++) { + fw->ipv6.dst = daddrs[j]; + fw->ipv6.dmsk = dmasks[j]; + if (verbose) + print_firewall_line(fw, handle); + ret &= ip6tc_insert_entry(chain, fw, rulenum, handle); + } + } + + return ret; +} + +static unsigned char * +make_delete_mask(const struct xtables_rule_match *matches, + const struct xtables_target *target) +{ + /* Establish mask for comparison */ + unsigned int size; + const struct xtables_rule_match *matchp; + unsigned char *mask, *mptr; + + size = sizeof(struct ip6t_entry); + for (matchp = matches; matchp; matchp = matchp->next) + size += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; + + mask = xtables_calloc(1, size + + XT_ALIGN(sizeof(struct ip6t_entry_target)) + + target->size); + + memset(mask, 0xFF, sizeof(struct ip6t_entry)); + mptr = mask + sizeof(struct ip6t_entry); + + for (matchp = matches; matchp; matchp = matchp->next) { + memset(mptr, 0xFF, + XT_ALIGN(sizeof(struct ip6t_entry_match)) + + matchp->match->userspacesize); + mptr += XT_ALIGN(sizeof(struct ip6t_entry_match)) + matchp->match->size; + } + + memset(mptr, 0xFF, + XT_ALIGN(sizeof(struct ip6t_entry_target)) + + target->userspacesize); + + return mask; +} + +static int +delete_entry(const ip6t_chainlabel chain, + struct ip6t_entry *fw, + unsigned int nsaddrs, + const struct in6_addr saddrs[], + const struct in6_addr smasks[], + unsigned int ndaddrs, + const struct in6_addr daddrs[], + const struct in6_addr dmasks[], + int verbose, + struct ip6tc_handle *handle, + struct xtables_rule_match *matches, + const struct xtables_target *target) +{ + unsigned int i, j; + int ret = 1; + unsigned char *mask; + + mask = make_delete_mask(matches, target); + for (i = 0; i < nsaddrs; i++) { + fw->ipv6.src = saddrs[i]; + fw->ipv6.smsk = smasks[i]; + for (j = 0; j < ndaddrs; j++) { + fw->ipv6.dst = daddrs[j]; + fw->ipv6.dmsk = dmasks[j]; + if (verbose) + print_firewall_line(fw, handle); + ret &= ip6tc_delete_entry(chain, fw, mask, handle); + } + } + free(mask); + + return ret; +} + +static int +check_entry(const ip6t_chainlabel chain, struct ip6t_entry *fw, + unsigned int nsaddrs, const struct in6_addr *saddrs, + const struct in6_addr *smasks, unsigned int ndaddrs, + const struct in6_addr *daddrs, const struct in6_addr *dmasks, + bool verbose, struct ip6tc_handle *handle, + struct xtables_rule_match *matches, + const struct xtables_target *target) +{ + unsigned int i, j; + int ret = 1; + unsigned char *mask; + + mask = make_delete_mask(matches, target); + for (i = 0; i < nsaddrs; i++) { + fw->ipv6.src = saddrs[i]; + fw->ipv6.smsk = smasks[i]; + for (j = 0; j < ndaddrs; j++) { + fw->ipv6.dst = daddrs[j]; + fw->ipv6.dmsk = dmasks[j]; + if (verbose) + print_firewall_line(fw, handle); + ret &= ip6tc_check_entry(chain, fw, mask, handle); + } + } + + free(mask); + return ret; +} + +int +for_each_chain6(int (*fn)(const ip6t_chainlabel, int, struct ip6tc_handle *), + int verbose, int builtinstoo, struct ip6tc_handle *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 = xtables_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_entries6(const ip6t_chainlabel chain, int verbose, + struct ip6tc_handle *handle) +{ + if (!chain) + return for_each_chain6(flush_entries6, 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, + struct ip6tc_handle *handle) +{ + if (!chain) + return for_each_chain6(zero_entries, verbose, 1, handle); + + if (verbose) + fprintf(stdout, "Zeroing chain `%s'\n", chain); + return ip6tc_zero_entries(chain, handle); +} + +int +delete_chain6(const ip6t_chainlabel chain, int verbose, + struct ip6tc_handle *handle) +{ + if (!chain) + return for_each_chain6(delete_chain6, 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 rulenum, int verbose, int numeric, + int expanded, int linenumbers, struct ip6tc_handle *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"); + + if (!rulenum) + print_header(format, this, handle); + i = ip6tc_first_rule(this, handle); + + num = 0; + while (i) { + num++; + if (!rulenum || num == rulenum) + print_firewall(i, + ip6tc_get_target(i, handle), + num, + format, + handle); + i = ip6tc_next_rule(i, handle); + } + found = 1; + } + + errno = ENOENT; + return found; +} + +/* This assumes that mask is contiguous, and byte-bounded. */ +static void +print_iface(char letter, const char *iface, const unsigned char *mask, + int invert) +{ + unsigned int i; + + if (mask[0] == 0) + return; + + printf("%s -%c ", invert ? " !" : "", letter); + + for (i = 0; i < IFNAMSIZ; i++) { + if (mask[i] != 0) { + if (iface[i] != '\0') + printf("%c", iface[i]); + } else { + /* we can access iface[i-1] here, because + * a few lines above we make sure that mask[0] != 0 */ + if (iface[i-1] != '\0') + printf("+"); + break; + } + } +} + +/* The ip6tables looks up the /etc/protocols. */ +static void print_proto(uint16_t proto, int invert) +{ + if (proto) { + unsigned int i; + const char *invertstr = invert ? " !" : ""; + + const struct protoent *pent = getprotobynumber(proto); + if (pent) { + printf("%s -p %s", + invertstr, pent->p_name); + return; + } + + for (i = 0; xtables_chain_protos[i].name != NULL; ++i) + if (xtables_chain_protos[i].num == proto) { + printf("%s -p %s", + invertstr, xtables_chain_protos[i].name); + return; + } + + printf("%s -p %u", invertstr, proto); + } +} + +static int print_match_save(const struct ip6t_entry_match *e, + const struct ip6t_ip6 *ip) +{ + const struct xtables_match *match = + xtables_find_match(e->u.user.name, XTF_TRY_LOAD, NULL); + + if (match) { + printf(" -m %s", e->u.user.name); + + /* some matches don't provide a save function */ + if (match->save) + match->save(ip, e); + } else { + if (e->u.match_size) { + fprintf(stderr, + "Can't find library for match `%s'\n", + e->u.user.name); + exit(1); + } + } + return 0; +} + +/* print a given ip including mask if neccessary */ +static void print_ip(const char *prefix, const struct in6_addr *ip, + const struct in6_addr *mask, int invert) +{ + char buf[51]; + int l = ipv6_prefix_length(mask); + + if (l == 0 && !invert) + return; + + printf("%s %s %s", + invert ? " !" : "", + prefix, + inet_ntop(AF_INET6, ip, buf, sizeof buf)); + + if (l == -1) + printf("/%s", inet_ntop(AF_INET6, mask, buf, sizeof buf)); + else + printf("/%d", l); +} + +/* We want this to be readable, so only print out neccessary fields. + * Because that's the kind of world I want to live in. */ +void print_rule6(const struct ip6t_entry *e, + struct ip6tc_handle *h, const char *chain, int counters) +{ + const struct ip6t_entry_target *t; + const char *target_name; + + /* print counters for iptables-save */ + if (counters > 0) + printf("[%llu:%llu] ", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); + + /* print chain name */ + printf("-A %s", chain); + + /* Print IP part. */ + print_ip("-s", &(e->ipv6.src), &(e->ipv6.smsk), + e->ipv6.invflags & IP6T_INV_SRCIP); + + print_ip("-d", &(e->ipv6.dst), &(e->ipv6.dmsk), + e->ipv6.invflags & IP6T_INV_DSTIP); + + print_iface('i', e->ipv6.iniface, e->ipv6.iniface_mask, + e->ipv6.invflags & IP6T_INV_VIA_IN); + + print_iface('o', e->ipv6.outiface, e->ipv6.outiface_mask, + e->ipv6.invflags & IP6T_INV_VIA_OUT); + + print_proto(e->ipv6.proto, e->ipv6.invflags & IP6T_INV_PROTO); + +#if 0 + /* not definied in ipv6 + * FIXME: linux/netfilter_ipv6/ip6_tables: IP6T_INV_FRAG why definied? */ + if (e->ipv6.flags & IPT_F_FRAG) + printf("%s -f", + e->ipv6.invflags & IP6T_INV_FRAG ? " !" : ""); +#endif + + if (e->ipv6.flags & IP6T_F_TOS) + printf("%s -? %d", + e->ipv6.invflags & IP6T_INV_TOS ? " !" : "", + e->ipv6.tos); + + /* Print matchinfo part */ + if (e->target_offset) { + IP6T_MATCH_ITERATE(e, print_match_save, &e->ipv6); + } + + /* print counters for iptables -R */ + if (counters < 0) + printf(" -c %llu %llu", (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt); + + /* Print target name */ + target_name = ip6tc_get_target(e, h); + if (target_name && (*target_name != '\0')) +#ifdef IP6T_F_GOTO + printf(" -%c %s", e->ipv6.flags & IP6T_F_GOTO ? 'g' : 'j', target_name); +#else + printf(" -j %s", target_name); +#endif + + /* Print targinfo part */ + t = ip6t_get_target((struct ip6t_entry *)e); + if (t->u.user.name[0]) { + struct xtables_target *target = + xtables_find_target(t->u.user.name, XTF_TRY_LOAD); + + if (!target) { + fprintf(stderr, "Can't find library for target `%s'\n", + t->u.user.name); + exit(1); + } + + if (target->save) + target->save(&e->ipv6, t); + else { + /* If the target size is greater than ip6t_entry_target + * there is something to be saved, we just don't know + * how to print it */ + if (t->u.target_size != + sizeof(struct ip6t_entry_target)) { + fprintf(stderr, "Target `%s' is missing " + "save function\n", + t->u.user.name); + exit(1); + } + } + } + printf("\n"); +} + +static int +list_rules(const ip6t_chainlabel chain, int rulenum, int counters, + struct ip6tc_handle *handle) +{ + const char *this = NULL; + int found = 0; + + if (counters) + counters = -1; /* iptables -c format */ + + /* Dump out chain names first, + * thereby preventing dependency conflicts */ + if (!rulenum) for (this = ip6tc_first_chain(handle); + this; + this = ip6tc_next_chain(handle)) { + if (chain && strcmp(this, chain) != 0) + continue; + + if (ip6tc_builtin(this, handle)) { + struct ip6t_counters count; + printf("-P %s %s", this, ip6tc_get_policy(this, &count, handle)); + if (counters) + printf(" -c %llu %llu", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt); + printf("\n"); + } else { + printf("-N %s\n", this); + } + } + + for (this = ip6tc_first_chain(handle); + this; + this = ip6tc_next_chain(handle)) { + const struct ip6t_entry *e; + int num = 0; + + if (chain && strcmp(this, chain) != 0) + continue; + + /* Dump out rules */ + e = ip6tc_first_rule(this, handle); + while(e) { + num++; + if (!rulenum || num == rulenum) + print_rule6(e, handle, this, counters); + e = ip6tc_next_rule(e, handle); + } + found = 1; + } + + errno = ENOENT; + return found; +} + +static struct ip6t_entry * +generate_entry(const struct ip6t_entry *fw, + struct xtables_rule_match *matches, + struct ip6t_entry_target *target) +{ + unsigned int size; + struct xtables_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 = xtables_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; +} + +static void clear_rule_matches(struct xtables_rule_match **matches) +{ + struct xtables_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 command_jump(struct iptables_command_state *cs) +{ + size_t size; + + set_option(&cs->options, OPT_JUMP, &cs->fw6.ipv6.invflags, cs->invert); + cs->jumpto = parse_target(optarg); + /* TRY_LOAD (may be chain name) */ + cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD); + + if (cs->target == NULL) + return; + + size = XT_ALIGN(sizeof(struct ip6t_entry_target)) + cs->target->size; + + cs->target->t = xtables_calloc(1, size); + cs->target->t->u.target_size = size; + strcpy(cs->target->t->u.user.name, cs->jumpto); + cs->target->t->u.user.revision = cs->target->revision; + if (cs->target->init != NULL) + cs->target->init(cs->target->t); + if (cs->target->x6_options != NULL) + opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts, + cs->target->x6_options, + &cs->target->option_offset); + else + opts = xtables_merge_options(ip6tables_globals.orig_opts, opts, + cs->target->extra_opts, + &cs->target->option_offset); + if (opts == NULL) + xtables_error(OTHER_PROBLEM, "can't alloc memory!"); +} + +static void command_match(struct iptables_command_state *cs) +{ + struct xtables_match *m; + size_t size; + + if (cs->invert) + xtables_error(PARAMETER_PROBLEM, + "unexpected ! flag before --match"); + + m = xtables_find_match(optarg, XTF_LOAD_MUST_SUCCEED, &cs->matches); + size = XT_ALIGN(sizeof(struct ip6t_entry_match)) + m->size; + m->m = xtables_calloc(1, size); + m->m->u.match_size = size; + strcpy(m->m->u.user.name, m->name); + m->m->u.user.revision = m->revision; + if (m->init != NULL) + m->init(m->m); + if (m == m->next) + return; + /* Merge options for non-cloned matches */ + if (m->x6_options != NULL) + opts = xtables_options_xfrm(ip6tables_globals.orig_opts, opts, + m->x6_options, &m->option_offset); + else if (m->extra_opts != NULL) + opts = xtables_merge_options(ip6tables_globals.orig_opts, opts, + m->extra_opts, &m->option_offset); +} + +int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **handle) +{ + struct iptables_command_state cs; + struct ip6t_entry *e = NULL; + unsigned int nsaddrs = 0, ndaddrs = 0; + struct in6_addr *saddrs = NULL, *daddrs = NULL; + struct in6_addr *smasks = NULL, *dmasks = NULL; + + int verbose = 0; + const char *chain = NULL; + const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL; + const char *policy = NULL, *newname = NULL; + unsigned int rulenum = 0, command = 0; + const char *pcnt = NULL, *bcnt = NULL; + int ret = 1; + struct xtables_match *m; + struct xtables_rule_match *matchp; + struct xtables_target *t; + unsigned long long cnt; + + memset(&cs, 0, sizeof(cs)); + cs.jumpto = ""; + cs.argv = argv; + + /* re-set optind to 0 in case do_command6 gets called + * a second time */ + optind = 0; + + /* clear mflags in case do_command6 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; + + opts = xt_params->orig_opts; + while ((cs.c = getopt_long(argc, argv, + "-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:bvnt:m:xc:g:46", + opts, NULL)) != -1) { + switch (cs.c) { + /* + * Command selection + */ + case 'A': + add_command(&command, CMD_APPEND, CMD_NONE, + cs.invert); + chain = optarg; + break; + + case 'C': + add_command(&command, CMD_CHECK, CMD_NONE, + cs.invert); + chain = optarg; + break; + + case 'D': + add_command(&command, CMD_DELETE, CMD_NONE, + cs.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, + cs.invert); + chain = optarg; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + rulenum = parse_rulenumber(argv[optind++]); + else + xtables_error(PARAMETER_PROBLEM, + "-%c requires a rule number", + cmd2char(CMD_REPLACE)); + break; + + case 'I': + add_command(&command, CMD_INSERT, CMD_NONE, + cs.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 | CMD_ZERO_NUM, cs.invert); + if (optarg) chain = optarg; + else if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + chain = argv[optind++]; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + rulenum = parse_rulenumber(argv[optind++]); + break; + + case 'S': + add_command(&command, CMD_LIST_RULES, + CMD_ZERO | CMD_ZERO_NUM, cs.invert); + if (optarg) chain = optarg; + else if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + chain = argv[optind++]; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + rulenum = parse_rulenumber(argv[optind++]); + break; + + case 'F': + add_command(&command, CMD_FLUSH, CMD_NONE, + cs.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|CMD_LIST_RULES, + cs.invert); + if (optarg) chain = optarg; + else if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + chain = argv[optind++]; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') { + rulenum = parse_rulenumber(argv[optind++]); + command = CMD_ZERO_NUM; + } + break; + + case 'N': + if (optarg && (*optarg == '-' || *optarg == '!')) + xtables_error(PARAMETER_PROBLEM, + "chain name not allowed to start " + "with `%c'\n", *optarg); + if (xtables_find_target(optarg, XTF_TRY_LOAD)) + xtables_error(PARAMETER_PROBLEM, + "chain name may not clash " + "with target name\n"); + add_command(&command, CMD_NEW_CHAIN, CMD_NONE, + cs.invert); + chain = optarg; + break; + + case 'X': + add_command(&command, CMD_DELETE_CHAIN, CMD_NONE, + cs.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, + cs.invert); + chain = optarg; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + newname = argv[optind++]; + else + xtables_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, + cs.invert); + chain = optarg; + if (optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + policy = argv[optind++]; + else + xtables_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 (!cs.matches && cs.protocol) + xtables_find_match(cs.protocol, XTF_TRY_LOAD, + &cs.matches); + + exit_printhelp(cs.matches); + + /* + * Option selection + */ + case 'p': + xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); + set_option(&cs.options, OPT_PROTOCOL, &cs.fw6.ipv6.invflags, + cs.invert); + + /* Canonicalize into lower case */ + for (cs.protocol = optarg; *cs.protocol; cs.protocol++) + *cs.protocol = tolower(*cs.protocol); + + cs.protocol = optarg; + cs.fw6.ipv6.proto = xtables_parse_protocol(cs.protocol); + cs.fw6.ipv6.flags |= IP6T_F_PROTO; + + if (cs.fw6.ipv6.proto == 0 + && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO)) + xtables_error(PARAMETER_PROBLEM, + "rule would never match protocol"); + + if (is_exthdr(cs.fw6.ipv6.proto) + && (cs.fw6.ipv6.invflags & IP6T_INV_PROTO) == 0) + fprintf(stderr, + "Warning: never matched protocol: %s. " + "use extension match instead.\n", + cs.protocol); + break; + + case 's': + xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); + set_option(&cs.options, OPT_SOURCE, &cs.fw6.ipv6.invflags, + cs.invert); + shostnetworkmask = optarg; + break; + + case 'd': + xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); + set_option(&cs.options, OPT_DESTINATION, &cs.fw6.ipv6.invflags, + cs.invert); + dhostnetworkmask = optarg; + break; + +#ifdef IP6T_F_GOTO + case 'g': + set_option(&cs.options, OPT_JUMP, &cs.fw6.ipv6.invflags, + cs.invert); + cs.fw6.ipv6.flags |= IP6T_F_GOTO; + cs.jumpto = parse_target(optarg); + break; +#endif + + case 'j': + command_jump(&cs); + break; + + + case 'i': + if (*optarg == '\0') + xtables_error(PARAMETER_PROBLEM, + "Empty interface is likely to be " + "undesired"); + xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); + set_option(&cs.options, OPT_VIANAMEIN, &cs.fw6.ipv6.invflags, + cs.invert); + xtables_parse_interface(optarg, + cs.fw6.ipv6.iniface, + cs.fw6.ipv6.iniface_mask); + break; + + case 'o': + if (*optarg == '\0') + xtables_error(PARAMETER_PROBLEM, + "Empty interface is likely to be " + "undesired"); + xtables_check_inverse(optarg, &cs.invert, &optind, argc, argv); + set_option(&cs.options, OPT_VIANAMEOUT, &cs.fw6.ipv6.invflags, + cs.invert); + xtables_parse_interface(optarg, + cs.fw6.ipv6.outiface, + cs.fw6.ipv6.outiface_mask); + break; + + case 'v': + if (!verbose) + set_option(&cs.options, OPT_VERBOSE, + &cs.fw6.ipv6.invflags, cs.invert); + verbose++; + break; + + case 'm': + command_match(&cs); + break; + + case 'n': + set_option(&cs.options, OPT_NUMERIC, &cs.fw6.ipv6.invflags, + cs.invert); + break; + + case 't': + if (cs.invert) + xtables_error(PARAMETER_PROBLEM, + "unexpected ! flag before --table"); + *table = optarg; + break; + + case 'x': + set_option(&cs.options, OPT_EXPANDED, &cs.fw6.ipv6.invflags, + cs.invert); + break; + + case 'V': + if (cs.invert) + printf("Not %s ;-)\n", prog_vers); + else + printf("%s v%s\n", + prog_name, prog_vers); + exit(0); + + case '0': + set_option(&cs.options, OPT_LINENUMBERS, &cs.fw6.ipv6.invflags, + cs.invert); + break; + + case 'M': + xtables_modprobe_program = optarg; + break; + + case 'c': + + set_option(&cs.options, OPT_COUNTERS, &cs.fw6.ipv6.invflags, + cs.invert); + pcnt = optarg; + bcnt = strchr(pcnt + 1, ','); + if (bcnt) + bcnt++; + if (!bcnt && optind < argc && argv[optind][0] != '-' + && argv[optind][0] != '!') + bcnt = argv[optind++]; + if (!bcnt) + xtables_error(PARAMETER_PROBLEM, + "-%c requires packet and byte counter", + opt2char(OPT_COUNTERS)); + + if (sscanf(pcnt, "%llu", &cnt) != 1) + xtables_error(PARAMETER_PROBLEM, + "-%c packet counter not numeric", + opt2char(OPT_COUNTERS)); + cs.fw6.counters.pcnt = cnt; + + if (sscanf(bcnt, "%llu", &cnt) != 1) + xtables_error(PARAMETER_PROBLEM, + "-%c byte counter not numeric", + opt2char(OPT_COUNTERS)); + cs.fw6.counters.bcnt = cnt; + break; + + case '4': + /* This is not the IPv4 iptables */ + if (line != -1) + return 1; /* success: line ignored */ + fprintf(stderr, "This is the IPv6 version of ip6tables.\n"); + exit_tryhelp(2); + + case '6': + /* This is indeed the IPv6 ip6tables */ + break; + + case 1: /* non option */ + if (optarg[0] == '!' && optarg[1] == '\0') { + if (cs.invert) + xtables_error(PARAMETER_PROBLEM, + "multiple consecutive ! not" + " allowed"); + cs.invert = TRUE; + optarg[0] = '\0'; + continue; + } + fprintf(stderr, "Bad argument `%s'\n", optarg); + exit_tryhelp(2); + + default: + command_default(&cs, &ip6tables_globals); + break; + } + cs.invert = FALSE; + } + + for (matchp = cs.matches; matchp; matchp = matchp->next) + xtables_option_mfcall(matchp->match); + if (cs.target != NULL) + xtables_option_tfcall(cs.target); + + /* Fix me: must put inverse options checking here --MN */ + + if (optind < argc) + xtables_error(PARAMETER_PROBLEM, + "unknown arguments found on commandline"); + if (!command) + xtables_error(PARAMETER_PROBLEM, "no command specified"); + if (cs.invert) + xtables_error(PARAMETER_PROBLEM, + "nothing appropriate following !"); + + if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND | CMD_CHECK)) { + if (!(cs.options & OPT_DESTINATION)) + dhostnetworkmask = "::0/0"; + if (!(cs.options & OPT_SOURCE)) + shostnetworkmask = "::0/0"; + } + + if (shostnetworkmask) + xtables_ip6parse_multiple(shostnetworkmask, &saddrs, + &smasks, &nsaddrs); + + if (dhostnetworkmask) + xtables_ip6parse_multiple(dhostnetworkmask, &daddrs, + &dmasks, &ndaddrs); + + if ((nsaddrs > 1 || ndaddrs > 1) && + (cs.fw6.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP))) + xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple" + " source or destination IP addresses"); + + if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1)) + xtables_error(PARAMETER_PROBLEM, "Replacement rule does not " + "specify a unique address"); + + generic_opt_check(command, cs.options); + + if (chain != NULL && strlen(chain) >= XT_EXTENSION_MAXNAMELEN) + xtables_error(PARAMETER_PROBLEM, + "chain name `%s' too long (must be under %u chars)", + chain, XT_EXTENSION_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 && xtables_load_ko(xtables_modprobe_program, false) != -1) + *handle = ip6tc_init(*table); + + if (!*handle) + xtables_error(VERSION_PROBLEM, + "can't initialize ip6tables table `%s': %s", + *table, ip6tc_strerror(errno)); + + if (command == CMD_APPEND + || command == CMD_DELETE + || command == CMD_CHECK + || command == CMD_INSERT + || command == CMD_REPLACE) { + if (strcmp(chain, "PREROUTING") == 0 + || strcmp(chain, "INPUT") == 0) { + /* -o not valid with incoming packets. */ + if (cs.options & OPT_VIANAMEOUT) + xtables_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 (cs.options & OPT_VIANAMEIN) + xtables_error(PARAMETER_PROBLEM, + "Can't use -%c with %s\n", + opt2char(OPT_VIANAMEIN), + chain); + } + + if (cs.target && ip6tc_is_chain(cs.jumpto, *handle)) { + fprintf(stderr, + "Warning: using chain %s, not extension\n", + cs.jumpto); + + if (cs.target->t) + free(cs.target->t); + + cs.target = NULL; + } + + /* If they didn't specify a target, or it's a chain + name, use standard. */ + if (!cs.target + && (strlen(cs.jumpto) == 0 + || ip6tc_is_chain(cs.jumpto, *handle))) { + size_t size; + + cs.target = xtables_find_target(IP6T_STANDARD_TARGET, + XTF_LOAD_MUST_SUCCEED); + + size = sizeof(struct ip6t_entry_target) + + cs.target->size; + cs.target->t = xtables_calloc(1, size); + cs.target->t->u.target_size = size; + strcpy(cs.target->t->u.user.name, cs.jumpto); + if (cs.target->init != NULL) + cs.target->init(cs.target->t); + } + + if (!cs.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. */ +#ifdef IP6T_F_GOTO + if (cs.fw6.ipv6.flags & IP6T_F_GOTO) + xtables_error(PARAMETER_PROBLEM, + "goto '%s' is not a chain\n", + cs.jumpto); +#endif + xtables_find_target(cs.jumpto, XTF_LOAD_MUST_SUCCEED); + } else { + e = generate_entry(&cs.fw6, cs.matches, cs.target->t); + free(cs.target->t); + } + } + + switch (command) { + case CMD_APPEND: + ret = append_entry(chain, e, + nsaddrs, saddrs, smasks, + ndaddrs, daddrs, dmasks, + cs.options&OPT_VERBOSE, + *handle); + break; + case CMD_DELETE: + ret = delete_entry(chain, e, + nsaddrs, saddrs, smasks, + ndaddrs, daddrs, dmasks, + cs.options&OPT_VERBOSE, + *handle, cs.matches, cs.target); + break; + case CMD_DELETE_NUM: + ret = ip6tc_delete_num_entry(chain, rulenum - 1, *handle); + break; + case CMD_CHECK: + ret = check_entry(chain, e, + nsaddrs, saddrs, smasks, + ndaddrs, daddrs, dmasks, + cs.options&OPT_VERBOSE, + *handle, cs.matches, cs.target); + break; + case CMD_REPLACE: + ret = replace_entry(chain, e, rulenum - 1, + saddrs, smasks, daddrs, dmasks, + cs.options&OPT_VERBOSE, *handle); + break; + case CMD_INSERT: + ret = insert_entry(chain, e, rulenum - 1, + nsaddrs, saddrs, smasks, + ndaddrs, daddrs, dmasks, + cs.options&OPT_VERBOSE, + *handle); + break; + case CMD_FLUSH: + ret = flush_entries6(chain, cs.options&OPT_VERBOSE, *handle); + break; + case CMD_ZERO: + ret = zero_entries(chain, cs.options&OPT_VERBOSE, *handle); + break; + case CMD_ZERO_NUM: + ret = ip6tc_zero_counter(chain, rulenum, *handle); + break; + case CMD_LIST: + case CMD_LIST|CMD_ZERO: + case CMD_LIST|CMD_ZERO_NUM: + ret = list_entries(chain, + rulenum, + cs.options&OPT_VERBOSE, + cs.options&OPT_NUMERIC, + cs.options&OPT_EXPANDED, + cs.options&OPT_LINENUMBERS, + *handle); + if (ret && (command & CMD_ZERO)) + ret = zero_entries(chain, + cs.options&OPT_VERBOSE, *handle); + if (ret && (command & CMD_ZERO_NUM)) + ret = ip6tc_zero_counter(chain, rulenum, *handle); + break; + case CMD_LIST_RULES: + case CMD_LIST_RULES|CMD_ZERO: + case CMD_LIST_RULES|CMD_ZERO_NUM: + ret = list_rules(chain, + rulenum, + cs.options&OPT_VERBOSE, + *handle); + if (ret && (command & CMD_ZERO)) + ret = zero_entries(chain, + cs.options&OPT_VERBOSE, *handle); + if (ret && (command & CMD_ZERO_NUM)) + ret = ip6tc_zero_counter(chain, rulenum, *handle); + break; + case CMD_NEW_CHAIN: + ret = ip6tc_create_chain(chain, *handle); + break; + case CMD_DELETE_CHAIN: + ret = delete_chain6(chain, cs.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, cs.options&OPT_COUNTERS ? &cs.fw6.counters : NULL, *handle); + break; + default: + /* We should never reach this... */ + exit_tryhelp(2); + } + + if (verbose > 1) + dump_entries6(*handle); + + clear_rule_matches(&cs.matches); + + if (e != NULL) { + free(e); + e = NULL; + } + + free(saddrs); + free(smasks); + free(daddrs); + free(dmasks); + xtables_free_opts(1); + + return ret; +} -- cgit v1.2.3