move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 288 insertions, 0 deletions

diff --git a/include/openbsc/gb_proxy.h b/include/openbsc/gb_proxy.h
new file mode 100644
index 000000000..e10894fc3
--- /dev/null
+++ b/include/openbsc/gb_proxy.h
@@ -0,0 +1,288 @@
+#ifndef _GB_PROXY_H
+#define _GB_PROXY_H
+
+
+#include <osmocom/core/msgb.h>
+
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/vty/command.h>
+
+#include <sys/types.h>
+#include <regex.h>
+
+#define GBPROXY_INIT_VU_GEN_TX 256
+
+struct rate_ctr_group;
+struct gprs_gb_parse_context;
+struct tlv_parsed;
+
+enum gbproxy_global_ctr {
+	GBPROX_GLOB_CTR_INV_BVCI,
+	GBPROX_GLOB_CTR_INV_LAI,
+	GBPROX_GLOB_CTR_INV_RAI,
+	GBPROX_GLOB_CTR_INV_NSEI,
+	GBPROX_GLOB_CTR_PROTO_ERR_BSS,
+	GBPROX_GLOB_CTR_PROTO_ERR_SGSN,
+	GBPROX_GLOB_CTR_NOT_SUPPORTED_BSS,
+	GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN,
+	GBPROX_GLOB_CTR_RESTART_RESET_SGSN,
+	GBPROX_GLOB_CTR_TX_ERR_SGSN,
+	GBPROX_GLOB_CTR_OTHER_ERR,
+	GBPROX_GLOB_CTR_PATCH_PEER_ERR,
+};
+
+enum gbproxy_peer_ctr {
+	GBPROX_PEER_CTR_BLOCKED,
+	GBPROX_PEER_CTR_UNBLOCKED,
+	GBPROX_PEER_CTR_DROPPED,
+	GBPROX_PEER_CTR_INV_NSEI,
+	GBPROX_PEER_CTR_TX_ERR,
+	GBPROX_PEER_CTR_RAID_PATCHED_BSS,
+	GBPROX_PEER_CTR_RAID_PATCHED_SGSN,
+	GBPROX_PEER_CTR_APN_PATCHED,
+	GBPROX_PEER_CTR_TLLI_PATCHED_BSS,
+	GBPROX_PEER_CTR_TLLI_PATCHED_SGSN,
+	GBPROX_PEER_CTR_PTMSI_PATCHED_BSS,
+	GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN,
+	GBPROX_PEER_CTR_PATCH_CRYPT_ERR,
+	GBPROX_PEER_CTR_PATCH_ERR,
+	GBPROX_PEER_CTR_ATTACH_REQS,
+	GBPROX_PEER_CTR_ATTACH_REJS,
+	GBPROX_PEER_CTR_ATTACH_ACKS,
+	GBPROX_PEER_CTR_ATTACH_COMPLS,
+	GBPROX_PEER_CTR_RA_UPD_REQS,
+	GBPROX_PEER_CTR_RA_UPD_REJS,
+	GBPROX_PEER_CTR_RA_UPD_ACKS,
+	GBPROX_PEER_CTR_RA_UPD_COMPLS,
+	GBPROX_PEER_CTR_GMM_STATUS_BSS,
+	GBPROX_PEER_CTR_GMM_STATUS_SGSN,
+	GBPROX_PEER_CTR_DETACH_REQS,
+	GBPROX_PEER_CTR_DETACH_ACKS,
+	GBPROX_PEER_CTR_PDP_ACT_REQS,
+	GBPROX_PEER_CTR_PDP_ACT_REJS,
+	GBPROX_PEER_CTR_PDP_ACT_ACKS,
+	GBPROX_PEER_CTR_PDP_DEACT_REQS,
+	GBPROX_PEER_CTR_PDP_DEACT_ACKS,
+	GBPROX_PEER_CTR_TLLI_UNKNOWN,
+	GBPROX_PEER_CTR_TLLI_CACHE_SIZE,
+	GBPROX_PEER_CTR_LAST,
+};
+
+enum gbproxy_keep_mode {
+	GBPROX_KEEP_NEVER,
+	GBPROX_KEEP_REATTACH,
+	GBPROX_KEEP_IDENTIFIED,
+	GBPROX_KEEP_ALWAYS,
+};
+
+enum gbproxy_match_id {
+	GBPROX_MATCH_PATCHING,
+	GBPROX_MATCH_ROUTING,
+	GBPROX_MATCH_LAST
+};
+
+struct gbproxy_match {
+	int   enable;
+	char *re_str;
+	regex_t re_comp;
+};
+
+struct gbproxy_config {
+	/* parsed from config file */
+	uint16_t nsip_sgsn_nsei;
+
+	/* misc */
+	struct gprs_ns_inst *nsi;
+
+	/* Linked list of all Gb peers (except SGSN) */
+	struct llist_head bts_peers;
+
+	/* Counter */
+	struct rate_ctr_group *ctrg;
+
+	/* force mcc/mnc */
+	int core_mnc;
+	int core_mcc;
+	uint8_t* core_apn;
+	size_t core_apn_size;
+	int tlli_max_age;
+	int tlli_max_len;
+
+	/* Experimental config */
+	int patch_ptmsi;
+	int acquire_imsi;
+	int route_to_sgsn2;
+	uint16_t nsip_sgsn2_nsei;
+	enum gbproxy_keep_mode keep_link_infos;
+
+	/* IMSI checking/matching */
+	struct gbproxy_match matches[GBPROX_MATCH_LAST];
+};
+
+struct gbproxy_patch_state {
+	int local_mnc;
+	int local_mcc;
+
+	/* List of TLLIs for which patching is enabled */
+	struct llist_head logical_links;
+	int logical_link_count;
+};
+
+struct gbproxy_peer {
+	struct llist_head list;
+
+	/* point back to the config */
+	struct gbproxy_config *cfg;
+
+	/* NSEI of the peer entity */
+	uint16_t nsei;
+
+	/* BVCI used for Point-to-Point to this peer */
+	uint16_t bvci;
+	int blocked;
+
+	/* Routeing Area that this peer is part of (raw 04.08 encoding) */
+	uint8_t ra[6];
+
+	/* Counter */
+	struct rate_ctr_group *ctrg;
+
+	struct gbproxy_patch_state patch_state;
+};
+
+struct gbproxy_tlli_state {
+	uint32_t current;
+	uint32_t assigned;
+	int bss_validated;
+	int net_validated;
+
+	uint32_t ptmsi;
+};
+
+struct gbproxy_link_info {
+	struct llist_head list;
+
+	struct gbproxy_tlli_state tlli;
+	struct gbproxy_tlli_state sgsn_tlli;
+	uint32_t sgsn_nsei;
+
+	time_t timestamp;
+	uint8_t *imsi;
+	size_t imsi_len;
+
+	int imsi_acq_pending;
+	struct llist_head stored_msgs;
+	unsigned vu_gen_tx_bss;
+
+	int is_deregistered;
+
+	int is_matching[GBPROX_MATCH_LAST];
+};
+
+
+/* gb_proxy_vty .c */
+
+int gbproxy_vty_init(void);
+int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg);
+
+
+/* gb_proxy.c */
+int gbproxy_init_config(struct gbproxy_config *cfg);
+
+/* Main input function for Gb proxy */
+int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, uint16_t ns_bvci, uint16_t nsvci);
+
+int gbprox_signal(unsigned int subsys, unsigned int signal,
+		  void *handler_data, void *signal_data);
+
+/* Reset all persistent NS-VC's */
+int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi);
+
+void gbprox_reset(struct gbproxy_config *cfg);
+
+/* TLLI info handling */
+void gbproxy_delete_link_infos(struct gbproxy_peer *peer);
+struct gbproxy_link_info *gbproxy_update_link_state_ul(
+	struct gbproxy_peer *peer, time_t now,
+	struct gprs_gb_parse_context *parse_ctx);
+struct gbproxy_link_info *gbproxy_update_link_state_dl(
+	struct gbproxy_peer *peer, time_t now,
+	struct gprs_gb_parse_context *parse_ctx);
+int gbproxy_update_link_state_after(
+	struct gbproxy_peer *peer, struct gbproxy_link_info *link_info,
+	time_t now, struct gprs_gb_parse_context *parse_ctx);
+int gbproxy_remove_stale_link_infos(struct gbproxy_peer *peer, time_t now);
+void gbproxy_delete_link_info(struct gbproxy_peer *peer,
+			 struct gbproxy_link_info *link_info);
+void gbproxy_link_info_discard_messages(struct gbproxy_link_info *link_info);
+
+void gbproxy_attach_link_info(struct gbproxy_peer *peer, time_t now,
+			      struct gbproxy_link_info *link_info);
+void gbproxy_update_link_info(struct gbproxy_link_info *link_info,
+			      const uint8_t *imsi, size_t imsi_len);
+void gbproxy_detach_link_info(struct gbproxy_peer *peer,
+			      struct gbproxy_link_info *link_info);
+struct gbproxy_link_info *gbproxy_link_info_alloc( struct gbproxy_peer *peer);
+
+struct gbproxy_link_info *gbproxy_link_info_by_tlli(
+	struct gbproxy_peer *peer, uint32_t tlli);
+struct gbproxy_link_info *gbproxy_link_info_by_imsi(
+	struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len);
+struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli(
+	struct gbproxy_peer *peer, uint32_t tlli);
+struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli(
+	struct gbproxy_peer *peer,
+	uint32_t tlli, uint32_t sgsn_nsei);
+struct gbproxy_link_info *gbproxy_link_info_by_ptmsi(
+	struct gbproxy_peer *peer,
+	uint32_t ptmsi);
+
+int gbproxy_imsi_matches(
+	struct gbproxy_config *cfg,
+	enum gbproxy_match_id match_id,
+	struct gbproxy_link_info *link_info);
+uint32_t gbproxy_map_tlli(
+	uint32_t other_tlli, struct gbproxy_link_info *link_info, int to_bss);
+
+/* needed by gb_proxy_tlli.h */
+uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, uint32_t sgsn_ptmsi);
+uint32_t gbproxy_make_sgsn_tlli(
+	struct gbproxy_peer *peer, struct gbproxy_link_info *link_info,
+	uint32_t bss_tlli);
+void gbproxy_reset_link(struct gbproxy_link_info *link_info);
+int gbproxy_check_imsi(
+	struct gbproxy_match *match, const uint8_t *imsi, size_t imsi_len);
+
+/* Message patching */
+void gbproxy_patch_bssgp(
+	struct msgb *msg, uint8_t *bssgp, size_t bssgp_len,
+	struct gbproxy_peer *peer, struct gbproxy_link_info *link_info,
+	int *len_change, struct gprs_gb_parse_context *parse_ctx);
+
+int gbproxy_patch_llc(
+	struct msgb *msg, uint8_t *llc, size_t llc_len,
+	struct gbproxy_peer *peer, struct gbproxy_link_info *link_info,
+	int *len_change, struct gprs_gb_parse_context *parse_ctx);
+
+int gbproxy_set_patch_filter(
+	struct gbproxy_match *match, const char *filter, const char **err_msg);
+void gbproxy_clear_patch_filter(struct gbproxy_match *match);
+
+/* Peer handling */
+struct gbproxy_peer *gbproxy_peer_by_bvci(
+	struct gbproxy_config *cfg, uint16_t bvci);
+struct gbproxy_peer *gbproxy_peer_by_nsei(
+	struct gbproxy_config *cfg, uint16_t nsei);
+struct gbproxy_peer *gbproxy_peer_by_rai(
+	struct gbproxy_config *cfg, const uint8_t *ra);
+struct gbproxy_peer *gbproxy_peer_by_lai(
+	struct gbproxy_config *cfg, const uint8_t *la);
+struct gbproxy_peer *gbproxy_peer_by_lac(
+	struct gbproxy_config *cfg, const uint8_t *la);
+struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv(
+	struct gbproxy_config *cfg, struct tlv_parsed *tp);
+struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci);
+void gbproxy_peer_free(struct gbproxy_peer *peer);
+int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci);
+
+#endif