-/* Code to take an iptables-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 <dlfcn.h>
-#include <ctype.h>
-#include <stdarg.h>
-#include <limits.h>
-#include <unistd.h>
-#include <iptables.h>
-#include <fcntl.h>
-#include <sys/wait.h>
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-#ifndef PROC_SYS_MODPROBE
-#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
-#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_CHECK 0x0800U
-#define CMD_RENAME_CHAIN 0x1000U
-#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_FRAGMENT 0x00200U
-#define OPT_LINENUMBERS 0x00400U
-#define OPT_COUNTERS 0x00800U
-#define NUMBER_OF_OPT 12
-static const char optflags[NUMBER_OF_OPT]
-= { 'n', 's', 'd', 'p', 'j', 'v', 'x', 'i', 'o', 'f', '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' },
- { "fragments", 0, 0, 'f' },
- { "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 iptables-restore. iptables-restore.c sets line to the
- * current line of the input file, in order to give a more precise error
- * message. iptables 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 -f --line */
-/*INSERT*/ {'x',' ',' ',' ',' ',' ','x',' ',' ',' ','x'},
-/*DELETE*/ {'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'},
-/*CHECK*/ {'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 */ IPT_INV_SRCIP,
-/* -d */ IPT_INV_DSTIP,
-/* -p */ IPT_INV_PROTO,
-/* -j */ 0,
-/* -v */ 0,
-/* -x */ 0,
-/* -i */ IPT_INV_VIA_IN,
-/* -o */ IPT_INV_VIA_OUT,
-/* -f */ IPT_INV_FRAG,
-/*--line*/ 0
-};
-
-const char *program_version;
-const char *program_name;
-char *lib_dir;
-
-/* Keeping track of external matches and targets: linked lists. */
-struct iptables_match *iptables_matches = NULL;
-struct iptables_target *iptables_targets = NULL;
-
-/* Extra debugging from libiptc */
-extern void dump_entries(const iptc_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;
-};
-
-/* 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
-
-static const struct pprot chain_protos[] = {
- { "tcp", IPPROTO_TCP },
- { "udp", IPPROTO_UDP },
- { "icmp", IPPROTO_ICMP },
- { "esp", IPPROTO_ESP },
- { "ah", IPPROTO_AH },
- { "sctp", IPPROTO_SCTP },
- { "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;
-}
-
-struct in_addr *
-dotted_to_addr(const char *dotted)
-{
- static struct in_addr addr;
- unsigned char *addrp;
- char *p, *q;
- unsigned int onebyte;
- int i;
- char buf[20];
-
- /* copy dotted string, because we need to modify it */
- strncpy(buf, dotted, sizeof(buf) - 1);
- buf[sizeof(buf) - 1] = '\0';
- addrp = (unsigned char *) &(addr.s_addr);
-
- p = buf;
- for (i = 0; i < 3; i++) {
- if ((q = strchr(p, '.')) == NULL)
- return (struct in_addr *) NULL;
-
- *q = '\0';
- if (string_to_number(p, 0, 255, &onebyte) == -1)
- return (struct in_addr *) NULL;
-
- addrp[i] = (unsigned char) onebyte;
- p = q + 1;
- }
-
- /* we've checked 3 bytes, now we check the last one */
- if (string_to_number(p, 0, 255, &onebyte) == -1)
- return (struct in_addr *) NULL;
-
- addrp[3] = (unsigned char) onebyte;
-
- return &addr;
-}
-
-static struct in_addr *
-network_to_addr(const char *name)
-{
- struct netent *net;
- static struct in_addr addr;
-
- if ((net = getnetbyname(name)) != NULL) {
- if (net->n_addrtype != AF_INET)
- return (struct in_addr *) NULL;
- addr.s_addr = htonl((unsigned long) net->n_net);
- return &addr;
- }
-
- return (struct in_addr *) NULL;
-}
-
-static void
-inaddrcpy(struct in_addr *dst, struct in_addr *src)
-{
- /* memcpy(dst, src, sizeof(struct in_addr)); */
- dst->s_addr = src->s_addr;
-}
-
-static void free_opts(int reset_offset)
-{
- if (opts != original_opts) {
- free(opts);
- opts = original_opts;
- if (reset_offset)
- global_option_offset = 0;
- }
-}
-
-void
-exit_error(enum exittype status, 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 iptables or your kernel needs to be upgraded.\n");
- /* On error paths, make sure that we don't leak memory */
- free_opts(1);
- exit(status);
-}
-
-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);
-}
-
-void
-exit_printhelp(struct iptables_rule_match *matches)
-{
- struct iptables_rule_match *matchp = NULL;
- struct iptables_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 = iptables_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);
-}
-
-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(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;
-}
-
-static void *
-fw_calloc(size_t count, size_t size)
-{
- void *p;
-
- if ((p = calloc(count, size)) == NULL) {
- perror("iptables: calloc failed");
- exit(1);
- }
- return p;
-}
-
-static void *
-fw_malloc(size_t size)
-{
- void *p;
-
- if ((p = malloc(size)) == NULL) {
- perror("iptables: malloc failed");
- exit(1);
- }
- return p;
-}
-
-static struct in_addr *
-host_to_addr(const char *name, unsigned int *naddr)
-{
- struct hostent *host;
- struct in_addr *addr;
- unsigned int i;
-
- *naddr = 0;
- if ((host = gethostbyname(name)) != NULL) {
- if (host->h_addrtype != AF_INET ||
- host->h_length != sizeof(struct in_addr))
- return (struct in_addr *) NULL;
-
- while (host->h_addr_list[*naddr] != (char *) NULL)
- (*naddr)++;
- addr = fw_calloc(*naddr, sizeof(struct in_addr) * *naddr);
- for (i = 0; i < *naddr; i++)
- inaddrcpy(&(addr[i]),
- (struct in_addr *) host->h_addr_list[i]);
- return addr;
- }
-
- return (struct in_addr *) NULL;
-}
-
-static char *
-addr_to_host(const struct in_addr *addr)
-{
- struct hostent *host;
-
- if ((host = gethostbyaddr((char *) addr,
- sizeof(struct in_addr), AF_INET)) != NULL)
- return (char *) host->h_name;
-
- return (char *) NULL;
-}
-
-/*
- * 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.
-*/
-
-static struct in_addr *
-parse_hostnetwork(const char *name, unsigned int *naddrs)
-{
- struct in_addr *addrp, *addrptmp;
-
- if ((addrptmp = dotted_to_addr(name)) != NULL ||
- (addrptmp = network_to_addr(name)) != NULL) {
- addrp = fw_malloc(sizeof(struct in_addr));
- inaddrcpy(addrp, addrptmp);
- *naddrs = 1;
- return addrp;
- }
- if ((addrp = host_to_addr(name, naddrs)) != NULL)
- return addrp;
-
- exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
-}
-
-static struct in_addr *
-parse_mask(char *mask)
-{
- static struct in_addr maskaddr;
- struct in_addr *addrp;
- unsigned int bits;
-
- if (mask == NULL) {
- /* no mask at all defaults to 32 bits */
- maskaddr.s_addr = 0xFFFFFFFF;
- return &maskaddr;
- }
- if ((addrp = dotted_to_addr(mask)) != NULL)
- /* dotted_to_addr already returns a network byte order addr */
- return addrp;
- if (string_to_number(mask, 0, 32, &bits) == -1)
- exit_error(PARAMETER_PROBLEM,
- "invalid mask `%s' specified", mask);
- if (bits != 0) {
- maskaddr.s_addr = htonl(0xFFFFFFFF << (32 - bits));
- return &maskaddr;
- }
-
- maskaddr.s_addr = 0L;
- return &maskaddr;
-}
-
-void
-parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
- struct in_addr *maskp, unsigned int *naddrs)
-{
- struct in_addr *addrp;
- char buf[256];
- char *p;
- int i, j, k, n;
-
- strncpy(buf, name, sizeof(buf) - 1);
- buf[sizeof(buf) - 1] = '\0';
- if ((p = strrchr(buf, '/')) != NULL) {
- *p = '\0';
- addrp = parse_mask(p + 1);
- } else
- addrp = parse_mask(NULL);
- inaddrcpy(maskp, addrp);
-
- /* if a null mask is given, the name is ignored, like in "any/0" */
- if (maskp->s_addr == 0L)
- strcpy(buf, "0.0.0.0");
-
- addrp = *addrpp = parse_hostnetwork(buf, naddrs);
- n = *naddrs;
- for (i = 0, j = 0; i < n; i++) {
- addrp[j++].s_addr &= maskp->s_addr;
- for (k = 0; k < j - 1; k++) {
- if (addrp[k].s_addr == addrp[j - 1].s_addr) {
- (*naddrs)--;
- j--;
- break;
- }
- }
- }
-}
-
-struct iptables_match *
-find_match(const char *name, enum ipt_tryload tryload, struct iptables_rule_match **matches)
-{
- struct iptables_match *ptr;
-
- for (ptr = iptables_matches; ptr; ptr = ptr->next) {
- if (strcmp(name, ptr->name) == 0)
- break;
- }
-
-#ifndef NO_SHARED_LIBS
- if (!ptr && tryload != DONT_LOAD) {
- char path[strlen(lib_dir) + sizeof("/libipt_.so")
- + strlen(name)];
- sprintf(path, "%s/libipt_%s.so", lib_dir, name);
- if (dlopen(path, RTLD_NOW)) {
- /* Found library. If it didn't register itself,
- maybe they specified target as match. */
- ptr = find_match(name, DONT_LOAD, NULL);
-
- if (!ptr)
- exit_error(PARAMETER_PROBLEM,
- "Couldn't load match `%s'\n",
- name);
- } else if (tryload == LOAD_MUST_SUCCEED)
- exit_error(PARAMETER_PROBLEM,
- "Couldn't load match `%s':%s\n",
- name, dlerror());
- }
-#else
- if (ptr && !ptr->loaded) {
- if (tryload != DONT_LOAD)
- ptr->loaded = 1;
- else
- ptr = NULL;
- }
- if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
- exit_error(PARAMETER_PROBLEM,
- "Couldn't find match `%s'\n", name);
- }
-#endif
-
- if (ptr && matches) {
- struct iptables_rule_match **i;
- struct iptables_rule_match *newentry;
-
- newentry = fw_malloc(sizeof(struct iptables_rule_match));
-
- for (i = matches; *i; i = &(*i)->next);
- newentry->match = ptr;
- newentry->next = NULL;
- *i = newentry;
- }
-
- return ptr;
-}
-
-/* Christophe Burki wants `-p 6' to imply `-m tcp'. */
-static struct iptables_match *
-find_proto(const char *pname, enum ipt_tryload tryload, int nolookup, struct iptables_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;
-
- 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;
-}
-
-void parse_interface(const char *arg, char *vianame, unsigned char *mask)
-{
- int vialen = strlen(arg);
- unsigned int i;
-
- memset(mask, 0, IFNAMSIZ);
- memset(vianame, 0, IFNAMSIZ);
-
- if (vialen + 1 > IFNAMSIZ)
- exit_error(PARAMETER_PROBLEM,
- "interface name `%s' must be shorter than IFNAMSIZ"
- " (%i)", arg, IFNAMSIZ-1);
-
- strcpy(vianame, arg);
- if ((vialen == 0) || (vialen == 1 && vianame[0] == '+'))
- memset(mask, 0, IFNAMSIZ);
- else if (vianame[vialen - 1] == '+') {
- memset(mask, 0xFF, vialen - 1);
- memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1);
- /* Don't remove `+' here! -HW */
- } else {
- /* Include nul-terminator in match */
- memset(mask, 0xFF, vialen + 1);
- memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1);
- for (i = 0; vianame[i]; i++) {
- if (!isalnum(vianame[i])
- && vianame[i] != '_'
- && vianame[i] != '.') {
- printf("Warning: wierd character in interface"
- " `%s' (No aliases, :, ! or *).\n",
- vianame);
- break;
- }
- }
- }
-}
-
-/* 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(ipt_chainlabel))
- exit_error(PARAMETER_PROBLEM,
- "Invalid target name `%s' (%u chars max)",
- targetname, (unsigned int)sizeof(ipt_chainlabel)-1);
-
- for (ptr = targetname; *ptr; ptr++)
- if (isspace(*ptr))
- exit_error(PARAMETER_PROBLEM,
- "Invalid target name `%s'", targetname);
- return targetname;
-}
-
-static char *
-addr_to_network(const struct in_addr *addr)
-{
- struct netent *net;
-
- if ((net = getnetbyaddr((long) ntohl(addr->s_addr), AF_INET)) != NULL)
- return (char *) net->n_name;
-
- return (char *) NULL;
-}
-
-char *
-addr_to_dotted(const struct in_addr *addrp)
-{
- static char buf[20];
- const unsigned char *bytep;
-
- bytep = (const unsigned char *) &(addrp->s_addr);
- sprintf(buf, "%d.%d.%d.%d", bytep[0], bytep[1], bytep[2], bytep[3]);
- return buf;
-}
-
-char *
-addr_to_anyname(const struct in_addr *addr)
-{
- char *name;
-
- if ((name = addr_to_host(addr)) != NULL ||
- (name = addr_to_network(addr)) != NULL)
- return name;
-
- return addr_to_dotted(addr);
-}
-
-char *
-mask_to_dotted(const struct in_addr *mask)
-{
- int i;
- static char buf[20];
- u_int32_t maskaddr, bits;
-
- maskaddr = ntohl(mask->s_addr);
-
- if (maskaddr == 0xFFFFFFFFL)
- /* we don't want to see "/32" */
- return "";
-
- i = 32;
- bits = 0xFFFFFFFEL;
- while (--i >= 0 && maskaddr != bits)
- bits <<= 1;
- if (i >= 0)
- sprintf(buf, "/%d", i);
- else
- /* mask was not a decent combination of 1's and 0's */
- sprintf(buf, "/%s", addr_to_dotted(mask));
-
- return buf;
-}
-
-int
-string_to_number_ll(const char *s, unsigned long long min, unsigned long long max,
- unsigned long long *ret)
-{
- unsigned long long number;
- char *end;
-
- /* Handle hex, octal, etc. */
- errno = 0;
- number = strtoull(s, &end, 0);
- if (*end == '\0' && end != s) {
- /* we parsed a number, let's see if we want this */
- if (errno != ERANGE && min <= number && (!max || number <= max)) {
- *ret = number;
- return 0;
- }
- }
- return -1;
-}
-
-int
-string_to_number_l(const char *s, unsigned long min, unsigned long max,
- unsigned long *ret)
-{
- int result;
- unsigned long long number;
-
- result = string_to_number_ll(s, min, max, &number);
- *ret = (unsigned long)number;
-
- return result;
-}
-
-int string_to_number(const char *s, unsigned int min, unsigned int max,
- unsigned int *ret)
-{
- int result;
- unsigned long number;
-
- result = string_to_number_l(s, min, max, &number);
- *ret = (unsigned int)number;
-
- return result;
-}
-
-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];
- }
-}
-
-struct iptables_target *
-find_target(const char *name, enum ipt_tryload tryload)
-{
- struct iptables_target *ptr;
-
- /* Standard target? */
- if (strcmp(name, "") == 0
- || strcmp(name, IPTC_LABEL_ACCEPT) == 0
- || strcmp(name, IPTC_LABEL_DROP) == 0
- || strcmp(name, IPTC_LABEL_QUEUE) == 0
- || strcmp(name, IPTC_LABEL_RETURN) == 0)
- name = "standard";
-
- for (ptr = iptables_targets; ptr; ptr = ptr->next) {
- if (strcmp(name, ptr->name) == 0)
- break;
- }
-
-#ifndef NO_SHARED_LIBS
- if (!ptr && tryload != DONT_LOAD) {
- char path[strlen(lib_dir) + sizeof("/libipt_.so")
- + strlen(name)];
- sprintf(path, "%s/libipt_%s.so", lib_dir, name);
- if (dlopen(path, RTLD_NOW)) {
- /* Found library. If it didn't register itself,
- maybe they specified match as a target. */
- ptr = find_target(name, DONT_LOAD);
- if (!ptr)
- exit_error(PARAMETER_PROBLEM,
- "Couldn't load target `%s'\n",
- name);
- } else if (tryload == LOAD_MUST_SUCCEED)
- exit_error(PARAMETER_PROBLEM,
- "Couldn't load target `%s':%s\n",
- name, dlerror());
- }
-#else
- if (ptr && !ptr->loaded) {
- if (tryload != DONT_LOAD)
- ptr->loaded = 1;
- else
- ptr = NULL;
- }
- if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
- exit_error(PARAMETER_PROBLEM,
- "Couldn't find target `%s'\n", name);
- }
-#endif
-
- if (ptr)
- ptr->used = 1;
-
- return ptr;
-}
-
-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;
-
- /* Release previous options merged if any */
- free_opts(0);
-
- 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));
- 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;
-}
-
-static int compatible_revision(const char *name, u_int8_t revision, int opt)
-{
- struct ipt_get_revision rev;
- socklen_t s = sizeof(rev);
- int max_rev, sockfd;
-
- sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
- if (sockfd < 0) {
- fprintf(stderr, "Could not open socket to kernel: %s\n",
- strerror(errno));
- exit(1);
- }
-
- strcpy(rev.name, name);
- rev.revision = revision;
-
- max_rev = getsockopt(sockfd, IPPROTO_IP, opt, &rev, &s);
- if (max_rev < 0) {
- /* Definitely don't support this? */
- if (errno == EPROTONOSUPPORT) {
- close(sockfd);
- return 0;
- } else if (errno == ENOPROTOOPT) {
- close(sockfd);
- /* Assume only revision 0 support (old kernel) */
- return (revision == 0);
- } else {
- fprintf(stderr, "getsockopt failed strangely: %s\n",
- strerror(errno));
- exit(1);
- }
- }
- close(sockfd);
- return 1;
-}
-
-static int compatible_match_revision(const char *name, u_int8_t revision)
-{
- return compatible_revision(name, revision, IPT_SO_GET_REVISION_MATCH);
-}
-
-static int compatible_target_revision(const char *name, u_int8_t revision)
-{
- return compatible_revision(name, revision, IPT_SO_GET_REVISION_TARGET);
-}
-
-void
-register_match(struct iptables_match *me)
-{
- struct iptables_match **i, *old;
-
- if (strcmp(me->version, program_version) != 0) {
- fprintf(stderr, "%s: match `%s' v%s (I'm v%s).\n",
- program_name, me->name, me->version, program_version);
- exit(1);
- }
-
- /* Revision field stole a char from name. */
- if (strlen(me->name) >= IPT_FUNCTION_MAXNAMELEN-1) {
- fprintf(stderr, "%s: target `%s' has invalid name\n",
- program_name, me->name);
- exit(1);
- }
-
- old = find_match(me->name, DONT_LOAD, NULL);
- if (old) {
- if (old->revision == me->revision) {
- fprintf(stderr,
- "%s: match `%s' already registered.\n",
- program_name, me->name);
- exit(1);
- }
-
- /* Now we have two (or more) options, check compatibility. */
- if (compatible_match_revision(old->name, old->revision)
- && old->revision > me->revision)
- return;
-
- /* Replace if compatible. */
- if (!compatible_match_revision(me->name, me->revision))
- return;
-
- /* Delete old one. */
- for (i = &iptables_matches; *i!=old; i = &(*i)->next);
- *i = old->next;
- }
-
- if (me->size != IPT_ALIGN(me->size)) {
- fprintf(stderr, "%s: match `%s' has invalid size %u.\n",
- program_name, me->name, (unsigned int)me->size);
- exit(1);
- }
-
- /* Append to list. */
- for (i = &iptables_matches; *i; i = &(*i)->next);
- me->next = NULL;
- *i = me;
-
- me->m = NULL;
- me->mflags = 0;
-}
-
-void
-register_target(struct iptables_target *me)
-{
- struct iptables_target *old;
-
- if (strcmp(me->version, program_version) != 0) {
- fprintf(stderr, "%s: target `%s' v%s (I'm v%s).\n",
- program_name, me->name, me->version, program_version);
- exit(1);
- }
-
- /* Revision field stole a char from name. */
- if (strlen(me->name) >= IPT_FUNCTION_MAXNAMELEN-1) {
- fprintf(stderr, "%s: target `%s' has invalid name\n",
- program_name, me->name);
- exit(1);
- }
-
- old = find_target(me->name, DONT_LOAD);
- if (old) {
- struct iptables_target **i;
-
- if (old->revision == me->revision) {
- fprintf(stderr,
- "%s: target `%s' already registered.\n",
- program_name, me->name);
- exit(1);
- }
-
- /* Now we have two (or more) options, check compatibility. */
- if (compatible_target_revision(old->name, old->revision)
- && old->revision > me->revision)
- return;
-
- /* Replace if compatible. */
- if (!compatible_target_revision(me->name, me->revision))
- return;
-
- /* Delete old one. */
- for (i = &iptables_targets; *i!=old; i = &(*i)->next);
- *i = old->next;
- }
-
- if (me->size != IPT_ALIGN(me->size)) {
- fprintf(stderr, "%s: target `%s' has invalid size %u.\n",
- program_name, me->name, (unsigned int)me->size);
- exit(1);
- }
-
- /* Prepend to list. */
- me->next = iptables_targets;
- iptables_targets = me;
- me->t = NULL;
- me->tflags = 0;
-}
-
-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, iptc_handle_t *handle)
-{
- struct ipt_counters counters;
- const char *pol = iptc_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 (!iptc_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 ipt_entry_match *m,
- const struct ipt_ip *ip,
- int numeric)
-{
- struct iptables_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 ipt_entry *fw,
- const char *targname,
- unsigned int num,
- unsigned int format,
- const iptc_handle_t handle)
-{
- struct iptables_target *target = NULL;
- const struct ipt_entry_target *t;
- u_int8_t flags;
- char buf[BUFSIZ];
-
- if (!iptc_is_chain(targname, handle))
- target = find_target(targname, TRY_LOAD);
- else
- target = find_target(IPT_STANDARD_TARGET, LOAD_MUST_SUCCEED);
-
- t = ipt_get_target((struct ipt_entry *)fw);
- flags = fw->ip.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->ip.invflags & IPT_INV_PROTO ? '!' : ' ', stdout);
- {
- char *pname = proto_to_name(fw->ip.proto, format&FMT_NUMERIC);
- if (pname)
- printf(FMT("%-5s", "%s "), pname);
- else
- printf(FMT("%-5hu", "%hu "), fw->ip.proto);
- }
-
- if (format & FMT_OPTIONS) {
- if (format & FMT_NOTABLE)
- fputs("opt ", stdout);
- fputc(fw->ip.invflags & IPT_INV_FRAG ? '!' : '-', stdout);
- fputc(flags & IPT_F_FRAG ? 'f' : '-', stdout);
- fputc(' ', stdout);
- }
-
- if (format & FMT_VIA) {
- char iface[IFNAMSIZ+2];
-
- if (fw->ip.invflags & IPT_INV_VIA_IN) {
- iface[0] = '!';
- iface[1] = '\0';
- }
- else iface[0] = '\0';
-
- if (fw->ip.iniface[0] != '\0') {
- strcat(iface, fw->ip.iniface);
- }
- else if (format & FMT_NUMERIC) strcat(iface, "*");
- else strcat(iface, "any");
- printf(FMT(" %-6s ","in %s "), iface);
-
- if (fw->ip.invflags & IPT_INV_VIA_OUT) {
- iface[0] = '!';
- iface[1] = '\0';
- }
- else iface[0] = '\0';
-
- if (fw->ip.outiface[0] != '\0') {
- strcat(iface, fw->ip.outiface);
- }
- else if (format & FMT_NUMERIC) strcat(iface, "*");
- else strcat(iface, "any");
- printf(FMT("%-6s ","out %s "), iface);
- }
-
- fputc(fw->ip.invflags & IPT_INV_SRCIP ? '!' : ' ', stdout);
- if (fw->ip.smsk.s_addr == 0L && !(format & FMT_NUMERIC))
- printf(FMT("%-19s ","%s "), "anywhere");
- else {
- if (format & FMT_NUMERIC)
- sprintf(buf, "%s", addr_to_dotted(&(fw->ip.src)));
- else
- sprintf(buf, "%s", addr_to_anyname(&(fw->ip.src)));
- strcat(buf, mask_to_dotted(&(fw->ip.smsk)));
- printf(FMT("%-19s ","%s "), buf);
- }
-
- fputc(fw->ip.invflags & IPT_INV_DSTIP ? '!' : ' ', stdout);
- if (fw->ip.dmsk.s_addr == 0L && !(format & FMT_NUMERIC))
- printf(FMT("%-19s ","-> %s"), "anywhere");
- else {
- if (format & FMT_NUMERIC)
- sprintf(buf, "%s", addr_to_dotted(&(fw->ip.dst)));
- else
- sprintf(buf, "%s", addr_to_anyname(&(fw->ip.dst)));
- strcat(buf, mask_to_dotted(&(fw->ip.dmsk)));
- printf(FMT("%-19s ","-> %s"), buf);
- }
-
- if (format & FMT_NOTABLE)
- fputs(" ", stdout);
-
- IPT_MATCH_ITERATE(fw, print_match, &fw->ip, format & FMT_NUMERIC);
-
- if (target) {
- if (target->print)
- /* Print the target information. */
- target->print(&fw->ip, 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 ipt_entry *fw,
- const iptc_handle_t h)
-{
- struct ipt_entry_target *t;
-
- t = ipt_get_target((struct ipt_entry *)fw);
- print_firewall(fw, t->u.user.name, 0, FMT_PRINT_RULE, h);
-}
-
-static int
-append_entry(const ipt_chainlabel chain,
- struct ipt_entry *fw,
- unsigned int nsaddrs,
- const struct in_addr saddrs[],
- unsigned int ndaddrs,
- const struct in_addr daddrs[],
- int verbose,
- iptc_handle_t *handle)
-{
- unsigned int i, j;
- int ret = 1;
-
- for (i = 0; i < nsaddrs; i++) {
- fw->ip.src.s_addr = saddrs[i].s_addr;
- for (j = 0; j < ndaddrs; j++) {
- fw->ip.dst.s_addr = daddrs[j].s_addr;
- if (verbose)
- print_firewall_line(fw, *handle);
- ret &= iptc_append_entry(chain, fw, handle);
- }
- }
-
- return ret;
-}
-
-static int
-replace_entry(const ipt_chainlabel chain,
- struct ipt_entry *fw,
- unsigned int rulenum,
- const struct in_addr *saddr,
- const struct in_addr *daddr,
- int verbose,
- iptc_handle_t *handle)
-{
- fw->ip.src.s_addr = saddr->s_addr;
- fw->ip.dst.s_addr = daddr->s_addr;
-
- if (verbose)
- print_firewall_line(fw, *handle);
- return iptc_replace_entry(chain, fw, rulenum, handle);
-}
-
-static int
-insert_entry(const ipt_chainlabel chain,
- struct ipt_entry *fw,
- unsigned int rulenum,
- unsigned int nsaddrs,
- const struct in_addr saddrs[],
- unsigned int ndaddrs,
- const struct in_addr daddrs[],
- int verbose,
- iptc_handle_t *handle)
-{
- unsigned int i, j;
- int ret = 1;
-
- for (i = 0; i < nsaddrs; i++) {
- fw->ip.src.s_addr = saddrs[i].s_addr;
- for (j = 0; j < ndaddrs; j++) {
- fw->ip.dst.s_addr = daddrs[j].s_addr;
- if (verbose)
- print_firewall_line(fw, *handle);
- ret &= iptc_insert_entry(chain, fw, rulenum, handle);
- }
- }
-
- return ret;
-}
-
-static unsigned char *
-make_delete_mask(struct ipt_entry *fw, struct iptables_rule_match *matches)
-{
- /* Establish mask for comparison */
- unsigned int size;
- struct iptables_rule_match *matchp;
- unsigned char *mask, *mptr;
-
- size = sizeof(struct ipt_entry);
- for (matchp = matches; matchp; matchp = matchp->next)
- size += IPT_ALIGN(sizeof(struct ipt_entry_match)) + matchp->match->size;
-
- mask = fw_calloc(1, size
- + IPT_ALIGN(sizeof(struct ipt_entry_target))
- + iptables_targets->size);
-
- memset(mask, 0xFF, sizeof(struct ipt_entry));
- mptr = mask + sizeof(struct ipt_entry);
-
- for (matchp = matches; matchp; matchp = matchp->next) {
- memset(mptr, 0xFF,
- IPT_ALIGN(sizeof(struct ipt_entry_match))
- + matchp->match->userspacesize);
- mptr += IPT_ALIGN(sizeof(struct ipt_entry_match)) + matchp->match->size;
- }
-
- memset(mptr, 0xFF,
- IPT_ALIGN(sizeof(struct ipt_entry_target))
- + iptables_targets->userspacesize);
-
- return mask;
-}
-
-static int
-delete_entry(const ipt_chainlabel chain,
- struct ipt_entry *fw,
- unsigned int nsaddrs,
- const struct in_addr saddrs[],
- unsigned int ndaddrs,
- const struct in_addr daddrs[],
- int verbose,
- iptc_handle_t *handle,
- struct iptables_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->ip.src.s_addr = saddrs[i].s_addr;
- for (j = 0; j < ndaddrs; j++) {
- fw->ip.dst.s_addr = daddrs[j].s_addr;
- if (verbose)
- print_firewall_line(fw, *handle);
- ret &= iptc_delete_entry(chain, fw, mask, handle);
- }
- }
- free(mask);
-
- return ret;
-}
-
-int
-for_each_chain(int (*fn)(const ipt_chainlabel, int, iptc_handle_t *),
- int verbose, int builtinstoo, iptc_handle_t *handle)
-{
- int ret = 1;
- const char *chain;
- char *chains;
- unsigned int i, chaincount = 0;
-
- chain = iptc_first_chain(handle);
- while (chain) {
- chaincount++;
- chain = iptc_next_chain(handle);
- }
-
- chains = fw_malloc(sizeof(ipt_chainlabel) * chaincount);
- i = 0;
- chain = iptc_first_chain(handle);
- while (chain) {
- strcpy(chains + i*sizeof(ipt_chainlabel), chain);
- i++;
- chain = iptc_next_chain(handle);
- }
-
- for (i = 0; i < chaincount; i++) {
- if (!builtinstoo
- && iptc_builtin(chains + i*sizeof(ipt_chainlabel),
- *handle) == 1)
- continue;
- ret &= fn(chains + i*sizeof(ipt_chainlabel), verbose, handle);
- }
-
- free(chains);
- return ret;
-}
-
-int
-flush_entries(const ipt_chainlabel chain, int verbose,
- iptc_handle_t *handle)
-{
- if (!chain)
- return for_each_chain(flush_entries, verbose, 1, handle);
-
- if (verbose)
- fprintf(stdout, "Flushing chain `%s'\n", chain);
- return iptc_flush_entries(chain, handle);
-}
-
-static int
-zero_entries(const ipt_chainlabel chain, int verbose,
- iptc_handle_t *handle)
-{
- if (!chain)
- return for_each_chain(zero_entries, verbose, 1, handle);
-
- if (verbose)
- fprintf(stdout, "Zeroing chain `%s'\n", chain);
- return iptc_zero_entries(chain, handle);
-}
-
-int
-delete_chain(const ipt_chainlabel chain, int verbose,
- iptc_handle_t *handle)
-{
- if (!chain)
- return for_each_chain(delete_chain, verbose, 0, handle);
-
- if (verbose)
- fprintf(stdout, "Deleting chain `%s'\n", chain);
- return iptc_delete_chain(chain, handle);
-}
-
-static int
-list_entries(const ipt_chainlabel chain, int verbose, int numeric,
- int expanded, int linenumbers, iptc_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 = iptc_first_chain(handle);
- this;
- this = iptc_next_chain(handle)) {
- const struct ipt_entry *i;
- unsigned int num;
-
- if (chain && strcmp(chain, this) != 0)
- continue;
-
- if (found) printf("\n");
-
- print_header(format, this, handle);
- i = iptc_first_rule(this, handle);
-
- num = 0;
- while (i) {
- print_firewall(i,
- iptc_get_target(i, handle),
- num++,
- format,
- *handle);
- i = iptc_next_rule(i, handle);
- }
- found = 1;
- }
-
- errno = ENOENT;
- return found;
-}
-
-static char *get_modprobe(void)
-{
- int procfile;
- char *ret;
-
-#define PROCFILE_BUFSIZ 1024
- procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
- if (procfile < 0)
- return NULL;
-
- ret = (char *) malloc(PROCFILE_BUFSIZ);
- if (ret) {
- memset(ret, 0, PROCFILE_BUFSIZ);
- switch (read(procfile, ret, PROCFILE_BUFSIZ)) {
- case -1: goto fail;
- case PROCFILE_BUFSIZ: goto fail; /* Partial read. Wierd */
- }
- if (ret[strlen(ret)-1]=='\n')
- ret[strlen(ret)-1]=0;
- close(procfile);
- return ret;
- }
- fail:
- free(ret);
- close(procfile);
- return NULL;
-}
-
-int iptables_insmod(const char *modname, const char *modprobe)
-{
- char *buf = NULL;
- char *argv[3];
- int status;
-
- /* If they don't explicitly set it, read out of kernel */
- if (!modprobe) {
- buf = get_modprobe();
- if (!buf)
- return -1;
- modprobe = buf;
- }
-
- switch (fork()) {
- case 0:
- argv[0] = (char *)modprobe;
- argv[1] = (char *)modname;
- argv[2] = NULL;
- execv(argv[0], argv);
-
- /* not usually reached */
- exit(1);
- case -1:
- return -1;
-
- default: /* parent */
- wait(&status);
- }
-
- free(buf);
- if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
- return 0;
- return -1;
-}
-
-static struct ipt_entry *
-generate_entry(const struct ipt_entry *fw,
- struct iptables_rule_match *matches,
- struct ipt_entry_target *target)
-{
- unsigned int size;
- struct iptables_rule_match *matchp;
- struct ipt_entry *e;
-
- size = sizeof(struct ipt_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 iptables_rule_match **matches)
-{
- struct iptables_rule_match *matchp, *tmp;
-
- for (matchp = *matches; matchp;) {
- tmp = matchp->next;
- if (matchp->match->m)
- free(matchp->match->m);
- 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[IPT_FUNCTION_MAXNAMELEN - 2] = '\0';
- name[IPT_FUNCTION_MAXNAMELEN - 1] = revision;
-}
-
-int do_command(int argc, char *argv[], char **table, iptc_handle_t *handle)
-{
- struct ipt_entry fw, *e = NULL;
- int invert = 0;
- unsigned int nsaddrs = 0, ndaddrs = 0;
- struct in_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 iptables_match *m;
- struct iptables_rule_match *matches = NULL;
- struct iptables_rule_match *matchp;
- struct iptables_target *target = NULL;
- struct iptables_target *t;
- const char *jumpto = "";
- char *protocol = NULL;
- const char *modprobe = NULL;
- int proto_used = 0;
-
- 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 = iptables_matches; m; m = m->next)
- m->mflags = 0;
-
- for (t = iptables_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:fbvnt: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];
-
- /* iptables -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.ip.invflags,
- invert);
-
- /* Canonicalize into lower case */
- for (protocol = argv[optind-1]; *protocol; protocol++)
- *protocol = tolower(*protocol);
-
- protocol = argv[optind-1];
- fw.ip.proto = parse_protocol(protocol);
-
- if (fw.ip.proto == 0
- && (fw.ip.invflags & IPT_INV_PROTO))
- exit_error(PARAMETER_PROBLEM,
- "rule would never match protocol");
- break;
-
- case 's':
- check_inverse(optarg, &invert, &optind, argc);
- set_option(&options, OPT_SOURCE, &fw.ip.invflags,
- invert);
- shostnetworkmask = argv[optind-1];
- break;
-
- case 'd':
- check_inverse(optarg, &invert, &optind, argc);
- set_option(&options, OPT_DESTINATION, &fw.ip.invflags,
- invert);
- dhostnetworkmask = argv[optind-1];
- break;
-
- case 'j':
- set_option(&options, OPT_JUMP, &fw.ip.invflags,
- invert);
- jumpto = parse_target(optarg);
- /* TRY_LOAD (may be chain name) */
- target = find_target(jumpto, TRY_LOAD);
-
- if (target) {
- size_t size;
-
- size = IPT_ALIGN(sizeof(struct ipt_entry_target))
- + target->size;
-
- target->t = fw_calloc(1, size);
- target->t->u.target_size = size;
- strcpy(target->t->u.user.name, jumpto);
- set_revision(target->t->u.user.name,
- target->revision);
- if (target->init != NULL)
- target->init(target->t, &fw.nfcache);
- 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.ip.invflags,
- invert);
- parse_interface(argv[optind-1],
- fw.ip.iniface,
- fw.ip.iniface_mask);
- break;
-
- case 'o':
- check_inverse(optarg, &invert, &optind, argc);
- set_option(&options, OPT_VIANAMEOUT, &fw.ip.invflags,
- invert);
- parse_interface(argv[optind-1],
- fw.ip.outiface,
- fw.ip.outiface_mask);
- break;
-
- case 'f':
- set_option(&options, OPT_FRAGMENT, &fw.ip.invflags,
- invert);
- fw.ip.flags |= IPT_F_FRAG;
- break;
-
- case 'v':
- if (!verbose)
- set_option(&options, OPT_VERBOSE,
- &fw.ip.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 = IPT_ALIGN(sizeof(struct ipt_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, &fw.nfcache);
- opts = merge_options(opts, m->extra_opts, &m->option_offset);
- }
- break;
-
- case 'n':
- set_option(&options, OPT_NUMERIC, &fw.ip.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.ip.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.ip.invflags,
- invert);
- break;
-
- case 'M':
- modprobe = optarg;
- break;
-
- case 'c':
-
- set_option(&options, OPT_COUNTERS, &fw.ip.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 *)&fw.counters.pcnt) != 1)
- exit_error(PARAMETER_PROBLEM,
- "-%c packet counter not numeric",
- opt2char(OPT_COUNTERS));
-
- if (sscanf(bcnt, "%llu", (unsigned long long *)&fw.counters.bcnt) != 1)
- exit_error(PARAMETER_PROBLEM,
- "-%c byte counter not numeric",
- opt2char(OPT_COUNTERS));
-
- 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;
- }
- printf("Bad argument `%s'\n", optarg);
- exit_tryhelp(2);
-
- default:
- /* FIXME: This scheme doesn't allow two of the same
- matches --RR */
- if (!target
- || !(target->parse(c - target->option_offset,
- argv, invert,
- &target->tflags,
- &fw, &target->t))) {
- for (matchp = matches; matchp; matchp = matchp->next) {
- if (matchp->match->parse(c - matchp->match->option_offset,
- argv, invert,
- &matchp->match->mflags,
- &fw,
- &fw.nfcache,
- &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 encountere 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 iptables-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 = IPT_ALIGN(sizeof(struct ipt_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, &fw.nfcache);
-
- 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)
- matchp->match->final_check(matchp->match->mflags);
-
- if (target)
- 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 = "0.0.0.0/0";
- if (!(options & OPT_SOURCE))
- shostnetworkmask = "0.0.0.0/0";
- }
-
- if (shostnetworkmask)
- parse_hostnetworkmask(shostnetworkmask, &saddrs,
- &(fw.ip.smsk), &nsaddrs);
-
- if (dhostnetworkmask)
- parse_hostnetworkmask(dhostnetworkmask, &daddrs,
- &(fw.ip.dmsk), &ndaddrs);
-
- if ((nsaddrs > 1 || ndaddrs > 1) &&
- (fw.ip.invflags & (IPT_INV_SRCIP | IPT_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) > IPT_FUNCTION_MAXNAMELEN)
- exit_error(PARAMETER_PROBLEM,
- "chain name `%s' too long (must be under %i chars)",
- chain, IPT_FUNCTION_MAXNAMELEN);
-
- /* only allocate handle if we weren't called with a handle */
- if (!*handle)
- *handle = iptc_init(*table);
-
- /* try to insmod the module if iptc_init failed */
- if (!*handle && iptables_insmod("ip_tables", modprobe) != -1)
- *handle = iptc_init(*table);
-
- if (!*handle)
- exit_error(VERSION_PROBLEM,
- "can't initialize iptables table `%s': %s",
- *table, iptc_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 && iptc_is_chain(jumpto, *handle)) {
- printf("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
- || iptc_is_chain(jumpto, *handle))) {
- size_t size;
-
- target = find_target(IPT_STANDARD_TARGET,
- LOAD_MUST_SUCCEED);
-
- size = sizeof(struct ipt_entry_target)
- + target->size;
- target->t = fw_calloc(1, size);
- target->t->u.target_size = size;
- strcpy(target->t->u.user.name, jumpto);
- set_revision(target->t->u.user.name, target->revision);
- if (target->init != NULL)
- target->init(target->t, &fw.nfcache);
- }
-
- 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 = iptc_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 = iptc_create_chain(chain, handle);
- break;
- case CMD_DELETE_CHAIN:
- ret = delete_chain(chain, options&OPT_VERBOSE, handle);
- break;
- case CMD_RENAME_CHAIN:
- ret = iptc_rename_chain(chain, newname, handle);
- break;
- case CMD_SET_POLICY:
- ret = iptc_set_policy(chain, policy, NULL, handle);
- break;
- default:
- /* We should never reach this... */
- exit_tryhelp(2);
- }
-
- if (verbose > 1)
- dump_entries(*handle);
-
- clear_rule_matches(&matches);
-
- if (e != NULL) {
- free(e);
- e = NULL;
- }
-
- free(saddrs);
- free(daddrs);
- free_opts(1);
-
- return ret;
-}