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Commit 1ffd7fd2 authored by net[shemminger]!shemminger's avatar net[shemminger]!shemminger
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Import patch iproute2.110 

(Logical change 1.112)
parent 3e1d2ea6
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ChangeLog
View file @ 1ffd7fd2
2005-01-12 Jamal Hadi Salim <hadi@znyx.com>
* Add iptables tc support. This meant borrowing headers
from iptables *ugh*
2004-12-08 Jamal Hadi Salim <hadi@znyx.com>
* Add mirror and redirect actions
......
include/ip6tables.h
View file @ 1ffd7fd2
#ifndef _IP6TABLES_USER_H
#define _IP6TABLES_USER_H
#include "iptables_common.h"
#include "libiptc/libip6tc.h"
struct ip6tables_rule_match
{
struct ip6tables_rule_match *next;
struct ip6tables_match *match;
};
/* Include file for additions: new matches and targets. */
struct ip6tables_match
{
struct ip6tables_match *next;
ip6t_chainlabel name;
const char *version;
/* Size of match data. */
size_t size;
/* Size of match data relevent for userspace comparison purposes */
size_t userspacesize;
/* Function which prints out usage message. */
void (*help)(void);
/* Initialize the match. */
void (*init)(struct ip6t_entry_match *m, unsigned int *nfcache);
/* Function which parses command options; returns true if it
ate an option */
int (*parse)(int c, char **argv, int invert, unsigned int *flags,
const struct ip6t_entry *entry,
unsigned int *nfcache,
struct ip6t_entry_match **match);
/* Final check; exit if not ok. */
void (*final_check)(unsigned int flags);
/* Prints out the match iff non-NULL: put space at end */
void (*print)(const struct ip6t_ip6 *ip,
const struct ip6t_entry_match *match, int numeric);
/* Saves the union ipt_matchinfo in parsable form to stdout. */
void (*save)(const struct ip6t_ip6 *ip,
const struct ip6t_entry_match *match);
/* Pointer to list of extra command-line options */
const struct option *extra_opts;
/* Ignore these men behind the curtain: */
unsigned int option_offset;
struct ip6t_entry_match *m;
unsigned int mflags;
#ifdef NO_SHARED_LIBS
unsigned int loaded; /* simulate loading so options are merged properly */
#endif
};
struct ip6tables_target
{
struct ip6tables_target *next;
ip6t_chainlabel name;
const char *version;
/* Size of target data. */
size_t size;
/* Size of target data relevent for userspace comparison purposes */
size_t userspacesize;
/* Function which prints out usage message. */
void (*help)(void);
/* Initialize the target. */
void (*init)(struct ip6t_entry_target *t, unsigned int *nfcache);
/* Function which parses command options; returns true if it
ate an option */
int (*parse)(int c, char **argv, int invert, unsigned int *flags,
const struct ip6t_entry *entry,
struct ip6t_entry_target **target);
/* Final check; exit if not ok. */
void (*final_check)(unsigned int flags);
/* Prints out the target iff non-NULL: put space at end */
void (*print)(const struct ip6t_ip6 *ip,
const struct ip6t_entry_target *target, int numeric);
/* Saves the targinfo in parsable form to stdout. */
void (*save)(const struct ip6t_ip6 *ip,
const struct ip6t_entry_target *target);
/* Pointer to list of extra command-line options */
struct option *extra_opts;
/* Ignore these men behind the curtain: */
unsigned int option_offset;
struct ip6t_entry_target *t;
unsigned int tflags;
unsigned int used;
#ifdef NO_SHARED_LIBS
unsigned int loaded; /* simulate loading so options are merged properly */
#endif
};
extern int line;
/* Your shared library should call one of these. */
extern void register_match6(struct ip6tables_match *me);
extern void register_target6(struct ip6tables_target *me);
extern int do_command6(int argc, char *argv[], char **table,
ip6tc_handle_t *handle);
/* Keeping track of external matches and targets: linked lists. */
extern struct ip6tables_match *ip6tables_matches;
extern struct ip6tables_target *ip6tables_targets;
enum ip6t_tryload {
DONT_LOAD,
TRY_LOAD,
LOAD_MUST_SUCCEED
};
extern struct ip6tables_target *find_target(const char *name, enum ip6t_tryload);
extern struct ip6tables_match *find_match(const char *name, enum ip6t_tryload, struct ip6tables_rule_match **match);
extern int for_each_chain(int (*fn)(const ip6t_chainlabel, int, ip6tc_handle_t *), int verbose, int builtinstoo, ip6tc_handle_t *handle);
extern int flush_entries(const ip6t_chainlabel chain, int verbose, ip6tc_handle_t *handle);
extern int delete_chain(const ip6t_chainlabel chain, int verbose, ip6tc_handle_t *handle);
extern int ip6tables_insmod(const char *modname, const char *modprobe);
#endif /*_IP6TABLES_USER_H*/
include/iptables.h
View file @ 1ffd7fd2
#ifndef _IPTABLES_USER_H
#define _IPTABLES_USER_H
#include "iptables_common.h"
#include "libiptc/libiptc.h"
#ifndef IPPROTO_SCTP
#define IPPROTO_SCTP 132
#endif
struct iptables_rule_match
{
struct iptables_rule_match *next;
struct iptables_match *match;
};
/* Include file for additions: new matches and targets. */
struct iptables_match
{
struct iptables_match *next;
ipt_chainlabel name;
const char *version;
/* Size of match data. */
size_t size;
/* Size of match data relevent for userspace comparison purposes */
size_t userspacesize;
/* Function which prints out usage message. */
void (*help)(void);
/* Initialize the match. */
void (*init)(struct ipt_entry_match *m, unsigned int *nfcache);
/* Function which parses command options; returns true if it
ate an option */
int (*parse)(int c, char **argv, int invert, unsigned int *flags,
const struct ipt_entry *entry,
unsigned int *nfcache,
struct ipt_entry_match **match);
/* Final check; exit if not ok. */
void (*final_check)(unsigned int flags);
/* Prints out the match iff non-NULL: put space at end */
void (*print)(const struct ipt_ip *ip,
const struct ipt_entry_match *match, int numeric);
/* Saves the match info in parsable form to stdout. */
void (*save)(const struct ipt_ip *ip,
const struct ipt_entry_match *match);
/* Pointer to list of extra command-line options */
const struct option *extra_opts;
/* Ignore these men behind the curtain: */
unsigned int option_offset;
struct ipt_entry_match *m;
unsigned int mflags;
#ifdef NO_SHARED_LIBS
unsigned int loaded; /* simulate loading so options are merged properly */
#endif
};
struct iptables_target
{
struct iptables_target *next;
ipt_chainlabel name;
const char *version;
/* Size of target data. */
size_t size;
/* Size of target data relevent for userspace comparison purposes */
size_t userspacesize;
/* Function which prints out usage message. */
void (*help)(void);
/* Initialize the target. */
void (*init)(struct ipt_entry_target *t, unsigned int *nfcache);
/* Function which parses command options; returns true if it
ate an option */
int (*parse)(int c, char **argv, int invert, unsigned int *flags,
const struct ipt_entry *entry,
struct ipt_entry_target **target);
/* Final check; exit if not ok. */
void (*final_check)(unsigned int flags);
/* Prints out the target iff non-NULL: put space at end */
void (*print)(const struct ipt_ip *ip,
const struct ipt_entry_target *target, int numeric);
/* Saves the targinfo in parsable form to stdout. */
void (*save)(const struct ipt_ip *ip,
const struct ipt_entry_target *target);
/* Pointer to list of extra command-line options */
struct option *extra_opts;
/* Ignore these men behind the curtain: */
unsigned int option_offset;
struct ipt_entry_target *t;
unsigned int tflags;
unsigned int used;
#ifdef NO_SHARED_LIBS
unsigned int loaded; /* simulate loading so options are merged properly */
#endif
};
extern int line;
/* Your shared library should call one of these. */
extern void register_match(struct iptables_match *me);
extern void register_target(struct iptables_target *me);
extern struct in_addr *dotted_to_addr(const char *dotted);
extern char *addr_to_dotted(const struct in_addr *addrp);
extern char *addr_to_anyname(const struct in_addr *addr);
extern char *mask_to_dotted(const struct in_addr *mask);
extern void parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
struct in_addr *maskp, unsigned int *naddrs);
extern u_int16_t parse_protocol(const char *s);
extern int do_command(int argc, char *argv[], char **table,
iptc_handle_t *handle);
/* Keeping track of external matches and targets: linked lists. */
extern struct iptables_match *iptables_matches;
extern struct iptables_target *iptables_targets;
enum ipt_tryload {
DONT_LOAD,
TRY_LOAD,
LOAD_MUST_SUCCEED
};
extern struct iptables_target *find_target(const char *name, enum ipt_tryload);
extern struct iptables_match *find_match(const char *name, enum ipt_tryload, struct iptables_rule_match **match);
extern int delete_chain(const ipt_chainlabel chain, int verbose,
iptc_handle_t *handle);
extern int flush_entries(const ipt_chainlabel chain, int verbose,
iptc_handle_t *handle);
extern int for_each_chain(int (*fn)(const ipt_chainlabel, int, iptc_handle_t *),
int verbose, int builtinstoo, iptc_handle_t *handle);
#endif /*_IPTABLES_USER_H*/
include/iptables_common.h
View file @ 1ffd7fd2
#ifndef _IPTABLES_COMMON_H
#define _IPTABLES_COMMON_H
/* Shared definitions between ipv4 and ipv6. */
enum exittype {
OTHER_PROBLEM = 1,
PARAMETER_PROBLEM,
VERSION_PROBLEM
};
extern void exit_printhelp(void) __attribute__((noreturn));
extern void exit_tryhelp(int) __attribute__((noreturn));
int check_inverse(const char option[], int *invert, int *optind, int argc);
extern int string_to_number(const char *,
unsigned int,
unsigned int,
unsigned int *);
extern int string_to_number_l(const char *,
unsigned long int,
unsigned long int,
unsigned long *);
extern int string_to_number_ll(const char *,
unsigned long long int,
unsigned long long int,
unsigned long long *);
extern int iptables_insmod(const char *modname, const char *modprobe);
void exit_error(enum exittype, char *, ...)__attribute__((noreturn,
format(printf,2,3)));
extern const char *program_name, *program_version;
#ifdef NO_SHARED_LIBS
# ifdef _INIT
# define _init _INIT
# endif
extern void init_extensions(void);
#endif
#endif /*_IPTABLES_COMMON_H*/
include/libiptc/ipt_kernel_headers.h
View file @ 1ffd7fd2
/* This is the userspace/kernel interface for Generic IP Chains,
required for libc6. */
#ifndef _FWCHAINS_KERNEL_HEADERS_H
#define _FWCHAINS_KERNEL_HEADERS_H
#include <limits.h>
#if defined(__GLIBC__) && __GLIBC__ == 2
#include <netinet/ip.h>
#include <netinet/in.h>
#include <netinet/ip_icmp.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <net/if.h>
#include <sys/types.h>
#else /* libc5 */
#include <sys/socket.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/if.h>
#include <linux/icmp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/types.h>
#include <linux/in6.h>
#endif
#endif
include/libiptc/libip6tc.h
View file @ 1ffd7fd2
#ifndef _LIBIP6TC_H
#define _LIBIP6TC_H
/* Library which manipulates firewall rules. Version 0.2. */
#include <libiptc/ipt_kernel_headers.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#ifndef IP6T_MIN_ALIGN
#define IP6T_MIN_ALIGN (__alignof__(struct ip6t_entry))
#endif
#define IP6T_ALIGN(s) (((s) + (IP6T_MIN_ALIGN-1)) & ~(IP6T_MIN_ALIGN-1))
typedef char ip6t_chainlabel[32];
#define IP6TC_LABEL_ACCEPT "ACCEPT"
#define IP6TC_LABEL_DROP "DROP"
#define IP6TC_LABEL_QUEUE "QUEUE"
#define IP6TC_LABEL_RETURN "RETURN"
/* Transparent handle type. */
typedef struct ip6tc_handle *ip6tc_handle_t;
/* Does this chain exist? */
int ip6tc_is_chain(const char *chain, const ip6tc_handle_t handle);
/* Take a snapshot of the rules. Returns NULL on error. */
ip6tc_handle_t ip6tc_init(const char *tablename);
/* Cleanup after ip6tc_init(). */
void ip6tc_free(ip6tc_handle_t *h);
/* Iterator functions to run through the chains. Returns NULL at end. */
const char *ip6tc_first_chain(ip6tc_handle_t *handle);
const char *ip6tc_next_chain(ip6tc_handle_t *handle);
/* Get first rule in the given chain: NULL for empty chain. */
const struct ip6t_entry *ip6tc_first_rule(const char *chain,
ip6tc_handle_t *handle);
/* Returns NULL when rules run out. */
const struct ip6t_entry *ip6tc_next_rule(const struct ip6t_entry *prev,
ip6tc_handle_t *handle);
/* Returns a pointer to the target name of this position. */
const char *ip6tc_get_target(const struct ip6t_entry *e,
ip6tc_handle_t *handle);
/* Is this a built-in chain? */
int ip6tc_builtin(const char *chain, const ip6tc_handle_t handle);
/* Get the policy of a given built-in chain */
const char *ip6tc_get_policy(const char *chain,
struct ip6t_counters *counters,
ip6tc_handle_t *handle);
/* These functions return TRUE for OK or 0 and set errno. If errno ==
0, it means there was a version error (ie. upgrade libiptc). */
/* Rule numbers start at 1 for the first rule. */
/* Insert the entry `fw' in chain `chain' into position `rulenum'. */
int ip6tc_insert_entry(const ip6t_chainlabel chain,
const struct ip6t_entry *e,
unsigned int rulenum,
ip6tc_handle_t *handle);
/* Atomically replace rule `rulenum' in `chain' with `fw'. */
int ip6tc_replace_entry(const ip6t_chainlabel chain,
const struct ip6t_entry *e,
unsigned int rulenum,
ip6tc_handle_t *handle);
/* Append entry `fw' to chain `chain'. Equivalent to insert with
rulenum = length of chain. */
int ip6tc_append_entry(const ip6t_chainlabel chain,
const struct ip6t_entry *e,
ip6tc_handle_t *handle);
/* Delete the first rule in `chain' which matches `fw'. */
int ip6tc_delete_entry(const ip6t_chainlabel chain,
const struct ip6t_entry *origfw,
unsigned char *matchmask,
ip6tc_handle_t *handle);
/* Delete the rule in position `rulenum' in `chain'. */
int ip6tc_delete_num_entry(const ip6t_chainlabel chain,
unsigned int rulenum,
ip6tc_handle_t *handle);
/* Check the packet `fw' on chain `chain'. Returns the verdict, or
NULL and sets errno. */
const char *ip6tc_check_packet(const ip6t_chainlabel chain,
struct ip6t_entry *,
ip6tc_handle_t *handle);
/* Flushes the entries in the given chain (ie. empties chain). */
int ip6tc_flush_entries(const ip6t_chainlabel chain,
ip6tc_handle_t *handle);
/* Zeroes the counters in a chain. */
int ip6tc_zero_entries(const ip6t_chainlabel chain,
ip6tc_handle_t *handle);
/* Creates a new chain. */
int ip6tc_create_chain(const ip6t_chainlabel chain,
ip6tc_handle_t *handle);
/* Deletes a chain. */
int ip6tc_delete_chain(const ip6t_chainlabel chain,
ip6tc_handle_t *handle);
/* Renames a chain. */
int ip6tc_rename_chain(const ip6t_chainlabel oldname,
const ip6t_chainlabel newname,
ip6tc_handle_t *handle);
/* Sets the policy on a built-in chain. */
int ip6tc_set_policy(const ip6t_chainlabel chain,
const ip6t_chainlabel policy,
struct ip6t_counters *counters,
ip6tc_handle_t *handle);
/* Get the number of references to this chain */
int ip6tc_get_references(unsigned int *ref, const ip6t_chainlabel chain,
ip6tc_handle_t *handle);
/* read packet and byte counters for a specific rule */
struct ip6t_counters *ip6tc_read_counter(const ip6t_chainlabel chain,
unsigned int rulenum,
ip6tc_handle_t *handle);
/* zero packet and byte counters for a specific rule */
int ip6tc_zero_counter(const ip6t_chainlabel chain,
unsigned int rulenum,
ip6tc_handle_t *handle);
/* set packet and byte counters for a specific rule */
int ip6tc_set_counter(const ip6t_chainlabel chain,
unsigned int rulenum,
struct ip6t_counters *counters,
ip6tc_handle_t *handle);
/* Makes the actual changes. */
int ip6tc_commit(ip6tc_handle_t *handle);
/* Get raw socket. */
int ip6tc_get_raw_socket();
/* Translates errno numbers into more human-readable form than strerror. */
const char *ip6tc_strerror(int err);
/* Return prefix length, or -1 if not contiguous */
int ipv6_prefix_length(const struct in6_addr *a);
#endif /* _LIBIP6TC_H */
include/libiptc/libiptc.h
View file @ 1ffd7fd2
#ifndef _LIBIPTC_H
#define _LIBIPTC_H
/* Library which manipulates filtering rules. */
#include <libiptc/ipt_kernel_headers.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef IPT_MIN_ALIGN
/* ipt_entry has pointers and u_int64_t's in it, so if you align to
it, you'll also align to any crazy matches and targets someone
might write */
#define IPT_MIN_ALIGN (__alignof__(struct ipt_entry))
#endif
#define IPT_ALIGN(s) (((s) + ((IPT_MIN_ALIGN)-1)) & ~((IPT_MIN_ALIGN)-1))
typedef char ipt_chainlabel[32];
#define IPTC_LABEL_ACCEPT "ACCEPT"
#define IPTC_LABEL_DROP "DROP"
#define IPTC_LABEL_QUEUE "QUEUE"
#define IPTC_LABEL_RETURN "RETURN"
/* Transparent handle type. */
typedef struct iptc_handle *iptc_handle_t;
/* Does this chain exist? */
int iptc_is_chain(const char *chain, const iptc_handle_t handle);
/* Take a snapshot of the rules. Returns NULL on error. */
iptc_handle_t iptc_init(const char *tablename);
/* Cleanup after iptc_init(). */
void iptc_free(iptc_handle_t *h);
/* Iterator functions to run through the chains. Returns NULL at end. */
const char *iptc_first_chain(iptc_handle_t *handle);
const char *iptc_next_chain(iptc_handle_t *handle);
/* Get first rule in the given chain: NULL for empty chain. */
const struct ipt_entry *iptc_first_rule(const char *chain,
iptc_handle_t *handle);
/* Returns NULL when rules run out. */
const struct ipt_entry *iptc_next_rule(const struct ipt_entry *prev,
iptc_handle_t *handle);
/* Returns a pointer to the target name of this entry. */
const char *iptc_get_target(const struct ipt_entry *e,
iptc_handle_t *handle);
/* Is this a built-in chain? */
int iptc_builtin(const char *chain, const iptc_handle_t handle);
/* Get the policy of a given built-in chain */
const char *iptc_get_policy(const char *chain,
struct ipt_counters *counter,
iptc_handle_t *handle);
/* These functions return TRUE for OK or 0 and set errno. If errno ==
0, it means there was a version error (ie. upgrade libiptc). */
/* Rule numbers start at 1 for the first rule. */
/* Insert the entry `e' in chain `chain' into position `rulenum'. */
int iptc_insert_entry(const ipt_chainlabel chain,
const struct ipt_entry *e,
unsigned int rulenum,
iptc_handle_t *handle);
/* Atomically replace rule `rulenum' in `chain' with `e'. */
int iptc_replace_entry(const ipt_chainlabel chain,
const struct ipt_entry *e,
unsigned int rulenum,
iptc_handle_t *handle);
/* Append entry `e' to chain `chain'. Equivalent to insert with
rulenum = length of chain. */
int iptc_append_entry(const ipt_chainlabel chain,
const struct ipt_entry *e,
iptc_handle_t *handle);
/* Delete the first rule in `chain' which matches `e', subject to
matchmask (array of length == origfw) */
int iptc_delete_entry(const ipt_chainlabel chain,
const struct ipt_entry *origfw,
unsigned char *matchmask,
iptc_handle_t *handle);
/* Delete the rule in position `rulenum' in `chain'. */
int iptc_delete_num_entry(const ipt_chainlabel chain,
unsigned int rulenum,
iptc_handle_t *handle);
/* Check the packet `e' on chain `chain'. Returns the verdict, or
NULL and sets errno. */
const char *iptc_check_packet(const ipt_chainlabel chain,
struct ipt_entry *entry,
iptc_handle_t *handle);
/* Flushes the entries in the given chain (ie. empties chain). */
int iptc_flush_entries(const ipt_chainlabel chain,
iptc_handle_t *handle);
/* Zeroes the counters in a chain. */
int iptc_zero_entries(const ipt_chainlabel chain,
iptc_handle_t *handle);
/* Creates a new chain. */
int iptc_create_chain(const ipt_chainlabel chain,
iptc_handle_t *handle);
/* Deletes a chain. */
int iptc_delete_chain(const ipt_chainlabel chain,
iptc_handle_t *handle);
/* Renames a chain. */
int iptc_rename_chain(const ipt_chainlabel oldname,
const ipt_chainlabel newname,
iptc_handle_t *handle);
/* Sets the policy on a built-in chain. */
int iptc_set_policy(const ipt_chainlabel chain,
const ipt_chainlabel policy,
struct ipt_counters *counters,
iptc_handle_t *handle);
/* Get the number of references to this chain */
int iptc_get_references(unsigned int *ref,
const ipt_chainlabel chain,
iptc_handle_t *handle);
/* read packet and byte counters for a specific rule */
struct ipt_counters *iptc_read_counter(const ipt_chainlabel chain,
unsigned int rulenum,
iptc_handle_t *handle);
/* zero packet and byte counters for a specific rule */
int iptc_zero_counter(const ipt_chainlabel chain,
unsigned int rulenum,
iptc_handle_t *handle);
/* set packet and byte counters for a specific rule */
int iptc_set_counter(const ipt_chainlabel chain,
unsigned int rulenum,
struct ipt_counters *counters,
iptc_handle_t *handle);
/* Makes the actual changes. */
int iptc_commit(iptc_handle_t *handle);
/* Get raw socket. */
int iptc_get_raw_socket(void);
/* Translates errno numbers into more human-readable form than strerror. */
const char *iptc_strerror(int err);
#ifdef __cplusplus
}
#endif
#endif /* _LIBIPTC_H */
include/linux/tc_act/tc_ipt.h
View file @ 1ffd7fd2
#ifndef __LINUX_TC_IPT_H
#define __LINUX_TC_IPT_H
#include <linux/pkt_cls.h>
#define TCA_ACT_IPT 6
enum
{
TCA_IPT_UNSPEC,
TCA_IPT_TABLE,
TCA_IPT_HOOK,
TCA_IPT_INDEX,
TCA_IPT_CNT,
TCA_IPT_TM,
TCA_IPT_TARG,
__TCA_IPT_MAX
};
#define TCA_IPT_MAX (__TCA_IPT_MAX - 1)
#endif
tc/Makefile
View file @ 1ffd7fd2
......@@ -22,6 +22,7 @@ TCMODULES += q_hfsc.o
TCMODULES += q_htb.o
TCMODULES += m_gact.o
TCMODULES += m_mirred.o
TCMODULES += m_ipt.o
TCOBJ += $(TCMODULES)
......
tc/m_ipt.c
View file @ 1ffd7fd2
/*
* m_ipt.c iptables based targets
* utilities mostly ripped from iptables <duh, its the linux way>
*
* This program is free software; you can distribute 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.
*
* Authors: J Hadi Salim (hadi@cyberus.ca)
*
* TODO: bad bad hardcoding IPT_LIB_DIR and PROC_SYS_MODPROBE
*
*/
#include <syslog.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <iptables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include "utils.h"
#include "tc_util.h"
#include <linux/tc_act/tc_ipt.h>
#include <stdio.h>
#include <dlfcn.h>
#include <getopt.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/wait.h>
const char *pname = "tc-ipt";
const char *tname = "mangle";
const char *pversion = "0.1";
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#ifndef IPT_LIB_DIR
#define IPT_LIB_DIR "/usr/local/lib/iptables"
#endif
#ifndef PROC_SYS_MODPROBE
#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
#endif
static const char *ipthooks[] = {
"NF_IP_PRE_ROUTING",
"NF_IP_LOCAL_IN",
"NF_IP_FORWARD",
"NF_IP_LOCAL_OUT",
"NF_IP_POST_ROUTING",
};
static struct option original_opts[] = {
{"jump", 1, 0, 'j'},
{0, 0, 0, 0}
};
static struct iptables_target *t_list = NULL;
static unsigned int global_option_offset = 0;
#define OPTION_OFFSET 256
#if 0
/* no clue why register match is within targets
figure out later. Talk to Harald -- JHS
*/
void
register_match(struct iptables_match *me)
{
/* fprintf(stderr, "\nDummy register_match\n"); */
}
void
register_target(struct iptables_target *me)
{
/* fprintf(stderr, "\nDummy register_target %s \n", me->name);
*/
me->next = t_list;
t_list = me;
}
#endif
void
exit_tryhelp(int status)
{
fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
pname, pname);
exit(status);
}
void
exit_error(enum exittype status, char *msg, ...)
{
va_list args;
va_start(args, msg);
fprintf(stderr, "%s v%s: ", pname, pversion);
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");
exit(status);
}
/* stolen from iptables 1.2.11
They should really have them as a library so i can link to them
Email them next time i remember
*/
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;
}
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;
}
#if 0
static int
string_to_number(const char *s, unsigned int min, unsigned int max,
unsigned int *ret)
{
long number;
char *end;
/* Handle hex, octal, etc. */
errno = 0;
number = strtol(s, &end, 0);
if (*end == '\0' && end != s) {
/* we parsed a number, let's see if we want this */
if (errno != ERANGE && min <= number && number <= max) {
*ret = number;
return 0;
}
}
return -1;
}
#endif
static struct option *
copy_options(struct option *oldopts)
{
struct option *merge;
unsigned int num_old;
for (num_old = 0; oldopts[num_old].name; num_old++) ;
merge = malloc(sizeof (struct option) * (num_old + 1));
if (NULL == merge)
return NULL;
memcpy(merge, oldopts, num_old * sizeof (struct option));
memset(merge + num_old, 0, sizeof (struct option));
return merge;
}
static struct option *
merge_options(struct option *oldopts, const struct option *newopts,
unsigned int *option_offset)
{
struct option *merge;
unsigned int num_old, num_new, i;
for (num_old = 0; oldopts[num_old].name; num_old++) ;
for (num_new = 0; newopts[num_new].name; num_new++) ;
*option_offset = global_option_offset + 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 void *
fw_calloc(size_t count, size_t size)
{
void *p;
if ((p = (void *) calloc(count, size)) == NULL) {
perror("iptables: calloc failed");
exit(1);
}
return p;
}
#if 0
static void *
fw_malloc(size_t size)
{
void *p;
if ((p = (void *) malloc(size)) == NULL) {
perror("iptables: malloc failed");
exit(1);
}
return p;
}
static int
check_inverse(const char option[], int *invert)
{
if (option && strcmp(option, "!") == 0) {
if (*invert)
exit_error(PARAMETER_PROBLEM,
"Multiple `!' flags not allowed");
*invert = TRUE;
return TRUE;
}
return FALSE;
}
#endif
static struct iptables_target *
find_t(char *name)
{
struct iptables_target *m;
for (m = t_list; m; m = m->next) {
if (strcmp(m->name, name) == 0)
return m;
}
return NULL;
}
static struct iptables_target *
get_target_name(char *name)
{
void *handle;
char *error;
char *new_name, *lname;
struct iptables_target *m;
char path[sizeof (IPT_LIB_DIR) + sizeof ("/libipt_.so") + strlen(name)];
new_name = malloc(strlen(name) + 1);
lname = malloc(strlen(name) + 1);
if (new_name)
memset(new_name, '\0', strlen(name) + 1);
else
exit_error(PARAMETER_PROBLEM, "get_target_name");
if (lname)
memset(lname, '\0', strlen(name) + 1);
else
exit_error(PARAMETER_PROBLEM, "get_target_name");
strcpy(new_name, name);
strcpy(lname, name);
if (isupper(lname[0])) {
int i;
for (i = 0; i < strlen(name); i++) {
lname[i] = tolower(lname[i]);
}
}
if (islower(new_name[0])) {
int i;
for (i = 0; i < strlen(new_name); i++) {
new_name[i] = toupper(new_name[i]);
}
}
sprintf(path, IPT_LIB_DIR "/libipt_%s.so", new_name);
handle = dlopen(path, RTLD_LAZY);
if (!handle) {
sprintf(path, IPT_LIB_DIR "/libipt_%s.so", lname);
handle = dlopen(path, RTLD_LAZY);
if (!handle) {
fputs(dlerror(), stderr);
printf("\n");
return NULL;
}
}
m = dlsym(handle, new_name);
if ((error = dlerror()) != NULL) {
m = (struct iptables_target *) dlsym(handle, lname);
if ((error = dlerror()) != NULL) {
m = find_t(new_name);
if (NULL == m) {
m = find_t(lname);
if (NULL == m) {
fputs(error, stderr);
fprintf(stderr, "\n");
dlclose(handle);
return NULL;
}
}
}
}
return m;
}
#if 0
static 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;
}
#endif
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);
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;
}
int
build_st(struct iptables_target *target, struct ipt_entry_target *t)
{
unsigned int nfcache = 0;
if (target) {
size_t size;
size =
IPT_ALIGN(sizeof (struct ipt_entry_target)) + target->size;
if (NULL == t) {
target->t = fw_calloc(1, size);
target->init(target->t, &nfcache);
target->t->u.target_size = size;
} else {
target->t = t;
}
strcpy(target->t->u.user.name, target->name);
return 0;
}
return -1;
}
static int parse_ipt(struct action_util *a,int *argc_p,
char ***argv_p, int tca_id, struct nlmsghdr *n)
{
struct iptables_target *m = NULL;
struct ipt_entry fw;
struct rtattr *tail;
int c;
int rargc = *argc_p;
char **argv = *argv_p;
struct option *opts;
int argc = 0, iargc = 0;
char k[16];
int res = -1;
int size = 0;
int iok = 0, ok = 0;
__u32 hook = 0, index = 0;
res = 0;
{
int i;
for (i = 0; i < rargc; i++) {
if (NULL == argv[i] || 0 == strcmp(argv[i], "action")) {
break;
}
}
iargc = argc = i;
}
if (argc <= 2) {
fprintf(stderr,"bad arguements to ipt %d vs %d \n", argc, rargc);
return -1;
}
opts = copy_options(original_opts);
if (NULL == opts)
return -1;
while (1) {
c = getopt_long(argc, argv, "j:", opts, NULL);
if (c == -1)
break;
switch (c) {
case 'j':
m = get_target_name(optarg);
if (NULL != m) {
if (0 > build_st(m, NULL)) {
printf(" %s error \n", m->name);
return -1;
}
opts =
merge_options(opts, m->extra_opts,
&m->option_offset);
} else {
fprintf(stderr," failed to find target %s\n\n", optarg);
return -1;
}
ok++;
break;
default:
memset(&fw, 0, sizeof (fw));
if (m) {
unsigned int fake_flags = 0;
m->parse(c - m->option_offset, argv, 0,
&fake_flags, NULL, &m->t);
} else {
fprintf(stderr," failed to find target %s\n\n", optarg);
return -1;
}
ok++;
/*m->final_check(m->t); -- Is this necessary?
** useful when theres depencies
** eg ipt_TCPMSS.c has have the TCP match loaded
** before this can be used;
** also seems the ECN target needs it
*/
break;
}
}
if (iargc > optind) {
if (matches(argv[optind], "index") == 0) {
if (get_u32(&index, argv[optind + 1], 10)) {
fprintf(stderr, "Illegal \"index\"\n");
return -1;
}
iok++;
optind += 2;
}
}
if (!ok && !iok) {
fprintf(stderr," ipt Parser BAD!! (%s)\n", *argv);
return -1;
}
{
struct tcmsg *t = NLMSG_DATA(n);
if (t->tcm_parent != TC_H_ROOT
&& t->tcm_parent == TC_H_MAJ(TC_H_INGRESS)) {
hook = NF_IP_PRE_ROUTING;
} else {
hook = NF_IP_POST_ROUTING;
}
}
tail = (struct rtattr *) (((void *) n) + NLMSG_ALIGN(n->nlmsg_len));
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
fprintf(stdout, "tablename: %s hook: %s\n ", tname, ipthooks[hook]);
fprintf(stdout, "\ttarget: ");
if (m)
m->print(NULL, m->t, 0);
fprintf(stdout, " index %d\n", index);
if (strlen(tname) > 16) {
size = 16;
k[15] = 0;
} else {
size = 1 + strlen(tname);
}
strncpy(k, tname, size);
addattr_l(n, MAX_MSG, TCA_IPT_TABLE, k, size);
addattr_l(n, MAX_MSG, TCA_IPT_HOOK, &hook, 4);
addattr_l(n, MAX_MSG, TCA_IPT_INDEX, &index, 4);
if (m)
addattr_l(n, MAX_MSG, TCA_IPT_TARG, m->t, m->t->u.target_size);
tail->rta_len =
(((void *) n) + NLMSG_ALIGN(n->nlmsg_len)) - (void *) tail;
argc -= optind;
argv += optind;
*argc_p = rargc - iargc;
*argv_p = argv;
optind = 1;
return 0;
}
static int
print_ipt(struct action_util *au,FILE * f, struct rtattr *arg)
{
struct rtattr *tb[TCA_IPT_MAX + 1];
struct ipt_entry_target *t = NULL;
struct option *opts;
if (arg == NULL)
return -1;
opts = copy_options(original_opts);
if (NULL == opts)
return -1;
memset(tb, 0, sizeof (tb));
parse_rtattr(tb, TCA_IPT_MAX, RTA_DATA(arg), RTA_PAYLOAD(arg));
if (tb[TCA_IPT_TABLE] == NULL) {
fprintf(f, "[NULL ipt table name ] assuming mangle ");
} else {
fprintf(f, "tablename: %s ",
(char *) RTA_DATA(tb[TCA_IPT_TABLE]));
}
if (tb[TCA_IPT_HOOK] == NULL) {
fprintf(f, "[NULL ipt hook name ]\n ");
return -1;
} else {
__u32 hook;
hook = *(__u32 *) RTA_DATA(tb[TCA_IPT_HOOK]);
fprintf(f, " hook: %s \n", ipthooks[hook]);
}
if (tb[TCA_IPT_TARG] == NULL) {
fprintf(f, "\t[NULL ipt target parameters ] \n");
return -1;
} else {
struct iptables_target *m = NULL;
t = RTA_DATA(tb[TCA_IPT_TARG]);
m = get_target_name(t->u.user.name);
if (NULL != m) {
if (0 > build_st(m, t)) {
fprintf(stderr, " %s error \n", m->name);
return -1;
}
opts =
merge_options(opts, m->extra_opts,
&m->option_offset);
} else {
fprintf(stderr, " failed to find target %s\n\n",
t->u.user.name);
return -1;
}
fprintf(f, "\ttarget ");
m->print(NULL, m->t, 0);
if (tb[TCA_IPT_INDEX] == NULL) {
fprintf(f, " [NULL ipt target index ]\n");
} else {
__u32 index;
index = *(__u32 *) RTA_DATA(tb[TCA_IPT_INDEX]);
fprintf(f, " \n\tindex %d", index);
}
if (tb[TCA_IPT_CNT]) {
struct tc_cnt *c = RTA_DATA(tb[TCA_IPT_CNT]);;
fprintf(f, " ref %d bind %d", c->refcnt, c->bindcnt);
}
if (show_stats) {
if (tb[TCA_IPT_TM]) {
struct tcf_t *tm = RTA_DATA(tb[TCA_IPT_TM]);
print_tm(f,tm);
}
}
fprintf(f, " \n");
}
return 0;
}
struct action_util ipt_action_util = {
.id = "ipt",
.parse_aopt = parse_ipt,
.print_aopt = print_ipt,
};
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