remove remaining bits of osmo-bsc_nat

osmo-bsc_nat is too heavily tied into legacy SCCPlite code, as it
is not using libosmo-sigtran/osmo_ss7 so far.  It's also full of
customer-specific code and it's shared use of some libbsc code here
has been complicating osmo-bsc development.

The current plan is to continue to use osmo-bsc_nat from openbsc.git
for those legacy users that need it, and not use osmo-bsc_nat in
new 3GPP AoIP setups.  Should we ever get a strong demand for an AoIP
based bsc_nat, we can still revisit this later.

Change-Id: Ia05dc76336a64a7f08962843b9a7cc19f2c83387

5 files changed, 0 insertions, 680 deletions

diff --git a/include/osmocom/bsc/Makefile.am b/include/osmocom/bsc/Makefile.am
index b25dfd833..80f9b01ea 100644
--- a/include/osmocom/bsc/Makefile.am
+++ b/include/osmocom/bsc/Makefile.am
@@ -7,9 +7,6 @@ noinst_HEADERS = \
 	arfcn_range_encode.h \
 	bsc_msc.h \
 	bsc_msg_filter.h \
-	bsc_nat.h \
-	bsc_nat_callstats.h \
-	bsc_nat_sccp.h \
 	bsc_rll.h \
 	bsc_subscriber.h \
 	bsc_subscr_conn_fsm.h \
@@ -32,7 +29,6 @@ noinst_HEADERS = \
 	meas_feed.h \
 	meas_rep.h \
 	misdn.h \
-	nat_rewrite_trie.h \
 	network_listen.h \
 	openbscdefines.h \
 	osmo_bsc.h \
diff --git a/include/osmocom/bsc/bsc_nat.h b/include/osmocom/bsc/bsc_nat.h
deleted file mode 100644
index bd78b9d43..000000000
--- a/include/osmocom/bsc/bsc_nat.h
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2010-2012 by On-Waves
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef BSC_NAT_H
-#define BSC_NAT_H
-
-#include <osmocom/legacy_mgcp/mgcp.h>
-
-#include "bsc_msg_filter.h"
-
-#include <osmocom/core/select.h>
-#include <osmocom/core/msgb.h>
-#include <osmocom/core/msgfile.h>
-#include <osmocom/core/timer.h>
-#include <osmocom/core/write_queue.h>
-#include <osmocom/core/rate_ctr.h>
-#include <osmocom/core/statistics.h>
-#include <osmocom/gsm/protocol/gsm_04_08.h>
-
-#include <regex.h>
-#include <stdbool.h>
-
-#define DIR_BSC 1
-#define DIR_MSC 2
-
-#define PAGIN_GROUP_UNASSIGNED -1
-
-struct sccp_source_reference;
-struct nat_sccp_connection;
-struct bsc_nat_parsed;
-struct bsc_nat;
-struct bsc_nat_ussd_con;
-struct nat_rewrite_rule;
-
-/*
- * Is this terminated to the MSC, to the local machine (release
- * handling for IMSI filtering) or to a USSD provider?
- */
-enum {
-	NAT_CON_END_MSC,
-	NAT_CON_END_LOCAL,
-	NAT_CON_END_USSD,
-};
-
-/*
- * Pending command entry
- */
-struct bsc_cmd_list {
-	struct llist_head list_entry;
-
-	struct osmo_timer_list timeout;
-
-	/* The NATed ID used on the bsc_con*/
-	int nat_id;
-
-	/* The command from the control connection */
-	struct ctrl_cmd *cmd;
-};
-
-/*
- * Per BSC data structure
- */
-struct bsc_connection {
-	struct llist_head list_entry;
-
-	/* do we know anything about this BSC? */
-	int authenticated;
-	uint8_t last_rand[16];
-
-	/* the fd we use to communicate */
-	struct osmo_wqueue write_queue;
-
-	/* incoming message buffer */
-	struct msgb *pending_msg;
-
-	/* the BSS associated */
-	struct bsc_config *cfg;
-
-	/* a timeout node */
-	struct osmo_timer_list id_timeout;
-
-	/* pong timeout */
-	struct osmo_timer_list ping_timeout;
-	struct osmo_timer_list pong_timeout;
-
-	/* mgcp related code */
-	char *_endpoint_status;
-	int number_multiplexes;
-	int max_endpoints;
-	int last_endpoint;
-	int next_transaction;
-	uint32_t pending_dlcx_count;
-	struct llist_head pending_dlcx;
-
-	/* track the pending commands for this BSC */
-	struct llist_head cmd_pending;
-	int last_id;
-
-	/* a back pointer */
-	struct bsc_nat *nat;
-};
-
-/**
- * Stats per BSC
- */
-struct bsc_config_stats {
-	struct rate_ctr_group *ctrg;
-};
-
-enum bsc_cfg_ctr {
-	BCFG_CTR_SCCP_CONN,
-	BCFG_CTR_SCCP_CALLS,
-	BCFG_CTR_NET_RECONN,
-	BCFG_CTR_DROPPED_SCCP,
-	BCFG_CTR_DROPPED_CALLS,
-	BCFG_CTR_REJECTED_CR,
-	BCFG_CTR_REJECTED_MSG,
-	BCFG_CTR_ILL_PACKET,
-	BCFG_CTR_CON_TYPE_LU,
-	BCFG_CTR_CON_CMSERV_RQ,
-	BCFG_CTR_CON_PAG_RESP,
-	BCFG_CTR_CON_SSA,
-	BCFG_CTR_CON_OTHER,
-};
-
-/**
- * One BSC entry in the config
- */
-struct bsc_config {
-	struct llist_head entry;
-
-	uint8_t key[16];
-	uint8_t key_present;
-	char *token;
-	int nr;
-
-	char *description;
-
-	/* imsi white and blacklist */
-	char *acc_lst_name;
-
-	int forbid_paging;
-	int paging_group;
-
-	/* audio handling */
-	int max_endpoints;
-
-	/* used internally for reload handling */
-	bool remove;
-	bool token_updated;
-
-	/* backpointer */
-	struct bsc_nat *nat;
-
-	struct bsc_config_stats stats;
-
-	struct llist_head lac_list;
-
-	/* Osmux is enabled/disabled per BSC */
-	int osmux;
-
-	/* Use a jitterbuffer on the bts-side receiver */
-	bool bts_use_jibuf;
-	/* Minimum and maximum buffer size for the jitter buffer, in ms */
-	uint32_t bts_jitter_delay_min;
-	uint32_t bts_jitter_delay_max;
-	/* Enabled if explicitly configured through VTY: */
-	bool bts_use_jibuf_override;
-	bool bts_jitter_delay_min_override;
-	bool bts_jitter_delay_max_override;
-};
-
-struct bsc_lac_entry {
-	struct llist_head entry;
-	uint16_t lac;
-};
-
-struct bsc_nat_paging_group {
-	struct llist_head entry;
-
-	/* list of lac entries */
-	struct llist_head lists;
-	int nr;
-};
-
-/**
- * BSCs point of view of endpoints
- */
-struct bsc_endpoint {
-	/* the operation that is carried out */
-	int transaction_state;
-	/* the pending transaction id */
-	char *transaction_id;
-	/* the bsc we are talking to */
-	struct bsc_connection *bsc;
-};
-
-/**
- * Statistic for the nat.
- */
-struct bsc_nat_statistics {
-	struct {
-		struct osmo_counter *conn;
-		struct osmo_counter *calls;
-	} sccp;
-
-	struct {
-		struct osmo_counter *reconn;
-                struct osmo_counter *auth_fail;
-	} bsc;
-
-	struct {
-		struct osmo_counter *reconn;
-	} msc;
-
-	struct {
-		struct osmo_counter *reconn;
-	} ussd;
-};
-
-/**
- * the structure of the "nat" network
- */
-struct bsc_nat {
-	/* active SCCP connections that need patching */
-	struct llist_head sccp_connections;
-
-	/* active BSC connections that need patching */
-	struct llist_head bsc_connections;
-
-	/* access lists */
-	struct llist_head access_lists;
-
-	/* paging groups */
-	struct llist_head paging_groups;
-
-	/* known BSC's */
-	struct llist_head bsc_configs;
-	int num_bsc;
-	int bsc_ip_dscp;
-
-	/* MGCP config */
-	struct mgcp_config *mgcp_cfg;
-	uint8_t mgcp_msg[4096];
-	int mgcp_length;
-	int mgcp_ipa;
-	int sdp_ensure_amr_mode_set;
-
-	/* msc things */
-	struct llist_head dests;
-	struct bsc_msc_dest *main_dest;
-	struct bsc_msc_connection *msc_con;
-	char *token;
-
-	/* timeouts */
-	int auth_timeout;
-	int ping_timeout;
-	int pong_timeout;
-
-	struct bsc_endpoint *bsc_endpoints;
-
-	/* path to file with BSC config */
-	char *include_file;
-	char *include_base;
-	char *resolved_path;
-
-	/* filter */
-	char *acc_lst_name;
-
-	/* Barring of subscribers with a rb tree */
-	struct rb_root imsi_black_list;
-	char *imsi_black_list_fn;
-
-	/* number rewriting */
-	char *num_rewr_name;
-	struct llist_head num_rewr;
-	char *num_rewr_post_name;
-	struct llist_head num_rewr_post;
-
-	char *smsc_rewr_name;
-	struct llist_head smsc_rewr;
-	char *tpdest_match_name;
-	struct llist_head tpdest_match;
-	char *sms_clear_tp_srr_name;
-	struct llist_head sms_clear_tp_srr;
-	char *sms_num_rewr_name;
-	struct llist_head sms_num_rewr;
-
-	/* more rewriting */
-	char *num_rewr_trie_name;
-	struct nat_rewrite *num_rewr_trie;
-
-	/* USSD messages  we want to match */
-	char *ussd_lst_name;
-	char *ussd_query;
-	regex_t ussd_query_re;
-	char *ussd_token;
-	char *ussd_local;
-	struct osmo_fd ussd_listen;
-	struct bsc_nat_ussd_con *ussd_con;
-
-	/* for maintainenance */
-	int blocked;
-
-	/* statistics */
-	struct bsc_nat_statistics stats;
-
-	/* control interface */
-	struct ctrl_handle *ctrl;
-};
-
-struct bsc_nat_ussd_con {
-	struct osmo_wqueue queue;
-	struct bsc_nat *nat;
-	int authorized;
-
-	struct msgb *pending_msg;
-
-	struct osmo_timer_list auth_timeout;
-};
-
-/* create and init the structures */
-struct bsc_config *bsc_config_alloc(struct bsc_nat *nat, const char *token,
-				    unsigned int number);
-struct bsc_config *bsc_config_num(struct bsc_nat *nat, int num);
-struct bsc_config *bsc_config_by_token(struct bsc_nat *nat, const char *token, int len);
-void bsc_config_free(struct bsc_config *);
-void bsc_config_add_lac(struct bsc_config *cfg, int lac);
-void bsc_config_del_lac(struct bsc_config *cfg, int lac);
-int bsc_config_handles_lac(struct bsc_config *cfg, int lac);
-
-struct bsc_nat *bsc_nat_alloc(void);
-struct bsc_connection *bsc_connection_alloc(struct bsc_nat *nat);
-void bsc_nat_set_msc_ip(struct bsc_nat *bsc, const char *ip);
-
-void sccp_connection_destroy(struct nat_sccp_connection *);
-void bsc_close_connection(struct bsc_connection *);
-
-const char *bsc_con_type_to_string(int type);
-
-/**
- * parse the given message into the above structure
- */
-struct bsc_nat_parsed *bsc_nat_parse(struct msgb *msg);
-
-/**
- * filter based on IP Access header in both directions
- */
-int bsc_nat_filter_ipa(int direction, struct msgb *msg, struct bsc_nat_parsed *parsed);
-int bsc_nat_vty_init(struct bsc_nat *nat);
-int bsc_nat_find_paging(struct msgb *msg, const uint8_t **,int *len);
-
-/**
- * SCCP patching and handling
- */
-struct nat_sccp_connection *create_sccp_src_ref(struct bsc_connection *bsc, struct bsc_nat_parsed *parsed);
-int update_sccp_src_ref(struct nat_sccp_connection *sccp, struct bsc_nat_parsed *parsed);
-void remove_sccp_src_ref(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed);
-struct nat_sccp_connection *patch_sccp_src_ref_to_bsc(struct msgb *, struct bsc_nat_parsed *, struct bsc_nat *);
-struct nat_sccp_connection *patch_sccp_src_ref_to_msc(struct msgb *, struct bsc_nat_parsed *, struct bsc_connection *);
-struct nat_sccp_connection *bsc_nat_find_con_by_bsc(struct bsc_nat *, struct sccp_source_reference *);
-
-/**
- * MGCP/Audio handling
- */
-int bsc_mgcp_nr_multiplexes(int max_endpoints);
-int bsc_write_mgcp(struct bsc_connection *bsc, const uint8_t *data, unsigned int length);
-int bsc_mgcp_assign_patch(struct nat_sccp_connection *, struct msgb *msg);
-void bsc_mgcp_init(struct nat_sccp_connection *);
-void bsc_mgcp_dlcx(struct nat_sccp_connection *);
-void bsc_mgcp_free_endpoints(struct bsc_nat *nat);
-int bsc_mgcp_nat_init(struct bsc_nat *nat);
-
-struct nat_sccp_connection *bsc_mgcp_find_con(struct bsc_nat *, int endpoint_number);
-struct msgb *bsc_mgcp_rewrite(char *input, int length, int endp, const char *ip,
-			      int port, int osmux, int *first_payload_type, int mode_set);
-void bsc_mgcp_forward(struct bsc_connection *bsc, struct msgb *msg);
-
-void bsc_mgcp_clear_endpoints_for(struct bsc_connection *bsc);
-int bsc_mgcp_parse_response(const char *str, int *code, char transaction[60]);
-uint32_t bsc_mgcp_extract_ci(const char *resp);
-
-
-int bsc_write(struct bsc_connection *bsc, struct msgb *msg, int id);
-int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int id);
-int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg);
-int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg);
-
-int bsc_nat_msc_is_connected(struct bsc_nat *nat);
-
-int bsc_conn_type_to_ctr(struct nat_sccp_connection *conn);
-
-struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed, struct msgb *msg, uint32_t *len);
-
-/** USSD filtering */
-int bsc_ussd_init(struct bsc_nat *nat);
-int bsc_ussd_check(struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed, struct msgb *msg);
-int bsc_ussd_close_connections(struct bsc_nat *nat);
-
-struct msgb *bsc_nat_rewrite_msg(struct bsc_nat *nat, struct msgb *msg, struct bsc_nat_parsed *, const char *imsi);
-
-/** paging group handling */
-struct bsc_nat_paging_group *bsc_nat_paging_group_num(struct bsc_nat *nat, int group);
-struct bsc_nat_paging_group *bsc_nat_paging_group_create(struct bsc_nat *nat, int group);
-void bsc_nat_paging_group_delete(struct bsc_nat_paging_group *);
-void bsc_nat_paging_group_add_lac(struct bsc_nat_paging_group *grp, int lac);
-void bsc_nat_paging_group_del_lac(struct bsc_nat_paging_group *grp, int lac);
-
-/**
- * Number rewriting support below
- */
-struct bsc_nat_num_rewr_entry {
-	struct llist_head list;
-
-	regex_t msisdn_reg;
-	regex_t num_reg;
-
-	char *replace;
-	uint8_t is_prefix_lookup;
-};
-
-void bsc_nat_num_rewr_entry_adapt(void *ctx, struct llist_head *head, const struct osmo_config_list *);
-
-void bsc_nat_send_mgcp_to_msc(struct bsc_nat *bsc_nat, struct msgb *msg);
-void bsc_nat_handle_mgcp(struct bsc_nat *bsc, struct msgb *msg);
-
-struct ctrl_handle *bsc_nat_controlif_setup(struct bsc_nat *nat,
-					    const char *bind_addr, int port);
-void bsc_nat_ctrl_del_pending(struct bsc_cmd_list *pending);
-int bsc_nat_handle_ctrlif_msg(struct bsc_connection *bsc, struct msgb *msg);
-
-int bsc_nat_extract_lac(struct bsc_connection *bsc, struct nat_sccp_connection *con,
-				struct bsc_nat_parsed *parsed, struct msgb *msg);
-
-int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
-			struct bsc_nat_parsed *, int *con_type, char **imsi,
-			struct bsc_filter_reject_cause *cause);
-int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
-			struct nat_sccp_connection *con, struct bsc_nat_parsed *parsed,
-			struct bsc_filter_reject_cause *cause);
-
-/**
- * CTRL interface helper
- */
-void bsc_nat_inform_reject(struct bsc_connection *bsc, const char *imsi);
-
-/*
- * Use for testing
- */
-void bsc_nat_free(struct bsc_nat *nat);
-
-#endif
diff --git a/include/osmocom/bsc/bsc_nat_callstats.h b/include/osmocom/bsc/bsc_nat_callstats.h
deleted file mode 100644
index 64f9bfc0a..000000000
--- a/include/osmocom/bsc/bsc_nat_callstats.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2010-2012 by On-Waves
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef BSC_NAT_CALLSTATS_H
-#define BSC_NAT_CALLSTATS_H
-
-#include <osmocom/core/linuxlist.h>
-
-#include <osmocom/sccp/sccp_types.h>
-
-struct bsc_nat_call_stats {
-	struct llist_head entry;
-
-	struct sccp_source_reference remote_ref;
-	struct sccp_source_reference src_ref; /* as seen by the MSC */
-
-	/* mgcp options */
-	uint32_t ci;
-	int bts_rtp_port;
-	int net_rtp_port;
-	struct in_addr bts_addr;
-	struct in_addr net_addr;
-
-
-	/* as witnessed by the NAT */
-	uint32_t net_ps;
-	uint32_t net_os;
-	uint32_t bts_pr;
-	uint32_t bts_or;
-	uint32_t bts_expected;
-	uint32_t bts_jitter;
-	int      bts_loss;
-
-	uint32_t trans_id;
-	int msc_endpoint;
-};
-
-#endif
diff --git a/include/osmocom/bsc/bsc_nat_sccp.h b/include/osmocom/bsc/bsc_nat_sccp.h
deleted file mode 100644
index 082466408..000000000
--- a/include/osmocom/bsc/bsc_nat_sccp.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/* NAT utilities using SCCP types */
-/*
- * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2010 by On-Waves
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef BSC_NAT_SCCP_H
-#define BSC_NAT_SCCP_H
-
-#include "bsc_msg_filter.h"
-
-#include <osmocom/sccp/sccp_types.h>
-
-/*
- * For the NAT we will need to analyze and later patch
- * the received message. This would require us to parse
- * the IPA and SCCP header twice. Instead of doing this
- * we will have one analyze structure and have the patching
- * and filter operate on the same structure.
- */
-struct bsc_nat_parsed {
-	/* ip access prototype */
-	int ipa_proto;
-
-	/* source local reference */
-	struct sccp_source_reference *src_local_ref;
-
-	/* destination local reference */
-	struct sccp_source_reference *dest_local_ref;
-
-	/* original value */
-	struct sccp_source_reference original_dest_ref;
-
-	/* called ssn number */
-	int called_ssn;
-
-	/* calling ssn number */
-	int calling_ssn;
-
-	/* sccp message type */
-	int sccp_type;
-
-	/* bssap type, e.g. 0 for BSS Management */
-	int bssap;
-
-	/* the gsm0808 message type */
-	int gsm_type;
-};
-
-/*
- * Per SCCP source local reference patch table. It needs to
- * be updated on new SCCP connections, connection confirm and reject,
- * and on the loss of the BSC connection.
- */
-struct nat_sccp_connection {
-	struct llist_head list_entry;
-
-	struct bsc_connection *bsc;
-	struct bsc_msc_connection *msc_con;
-
-	struct sccp_source_reference real_ref;
-	struct sccp_source_reference patched_ref;
-	struct sccp_source_reference remote_ref;
-	int has_remote_ref;
-
-	/* status */
-	int con_local;
-	int authorized;
-
-	struct bsc_filter_state filter_state;
-
-	uint16_t lac;
-	uint16_t ci;
-
-	/* remember which Transactions we run over the bypass */
-	char ussd_ti[8];
-
-	/*
-	 * audio handling. Remember if we have ever send a CRCX,
-	 * remember the endpoint used by the MSC and BSC.
-	 */
-	int msc_endp;
-	int bsc_endp;
-
-	/* timeout handling */
-	struct timespec creation_time;
-};
-
-
-#endif
diff --git a/include/osmocom/bsc/nat_rewrite_trie.h b/include/osmocom/bsc/nat_rewrite_trie.h
deleted file mode 100644
index 0571099c6..000000000
--- a/include/osmocom/bsc/nat_rewrite_trie.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * (C) 2013 by On-Waves
- * (C) 2013 by Holger Hans Peter Freyther <zecke@selfish.org>
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-#ifndef NAT_REWRITE_FILE_H
-#define NAT_REWRITE_FILE_H
-
-#include <osmocom/core/linuxrbtree.h>
-
-struct vty;
-
-struct nat_rewrite_rule {
-	/* For digits 0-9 and + */
-	struct nat_rewrite_rule *rules[11];
-
-	char empty;
-	char prefix[14];
-	char rewrite[6];
-};
-
-struct nat_rewrite {
-	struct nat_rewrite_rule rule;
-	size_t prefixes;
-};
-
-
-struct nat_rewrite *nat_rewrite_parse(void *ctx, const char *filename);
-struct nat_rewrite_rule *nat_rewrite_lookup(struct nat_rewrite *, const char *prefix);
-void nat_rewrite_dump(struct nat_rewrite *rewr);
-void nat_rewrite_dump_vty(struct vty *vty, struct nat_rewrite *rewr);
-
-#endif