Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 1 | #ifndef _GB_PROXY_H |
| 2 | #define _GB_PROXY_H |
| 3 | |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 4 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 5 | #include <osmocom/core/msgb.h> |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 6 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 7 | #include <osmocom/gprs/gprs_ns.h> |
Harald Welte | 4b037e4 | 2010-05-19 19:45:32 +0200 | [diff] [blame] | 8 | #include <osmocom/vty/command.h> |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 9 | |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 10 | #include <sys/types.h> |
| 11 | #include <regex.h> |
| 12 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 13 | struct rate_ctr_group; |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 14 | struct gprs_gb_parse_context; |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 15 | struct tlv_parsed; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 16 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 17 | enum gbproxy_global_ctr { |
| 18 | GBPROX_GLOB_CTR_INV_BVCI, |
| 19 | GBPROX_GLOB_CTR_INV_LAI, |
| 20 | GBPROX_GLOB_CTR_INV_RAI, |
| 21 | GBPROX_GLOB_CTR_INV_NSEI, |
| 22 | GBPROX_GLOB_CTR_PROTO_ERR_BSS, |
| 23 | GBPROX_GLOB_CTR_PROTO_ERR_SGSN, |
| 24 | GBPROX_GLOB_CTR_NOT_SUPPORTED_BSS, |
| 25 | GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN, |
| 26 | GBPROX_GLOB_CTR_RESTART_RESET_SGSN, |
| 27 | GBPROX_GLOB_CTR_TX_ERR_SGSN, |
| 28 | GBPROX_GLOB_CTR_OTHER_ERR, |
| 29 | GBPROX_GLOB_CTR_PATCH_PEER_ERR, |
| 30 | }; |
| 31 | |
| 32 | enum gbproxy_peer_ctr { |
| 33 | GBPROX_PEER_CTR_BLOCKED, |
| 34 | GBPROX_PEER_CTR_UNBLOCKED, |
| 35 | GBPROX_PEER_CTR_DROPPED, |
| 36 | GBPROX_PEER_CTR_INV_NSEI, |
| 37 | GBPROX_PEER_CTR_TX_ERR, |
| 38 | GBPROX_PEER_CTR_RAID_PATCHED_BSS, |
| 39 | GBPROX_PEER_CTR_RAID_PATCHED_SGSN, |
| 40 | GBPROX_PEER_CTR_APN_PATCHED, |
| 41 | GBPROX_PEER_CTR_TLLI_PATCHED_BSS, |
| 42 | GBPROX_PEER_CTR_TLLI_PATCHED_SGSN, |
| 43 | GBPROX_PEER_CTR_PTMSI_PATCHED_BSS, |
| 44 | GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN, |
| 45 | GBPROX_PEER_CTR_PATCH_CRYPT_ERR, |
| 46 | GBPROX_PEER_CTR_PATCH_ERR, |
| 47 | GBPROX_PEER_CTR_ATTACH_REQS, |
| 48 | GBPROX_PEER_CTR_ATTACH_REJS, |
| 49 | GBPROX_PEER_CTR_TLLI_UNKNOWN, |
| 50 | GBPROX_PEER_CTR_TLLI_CACHE_SIZE, |
| 51 | }; |
| 52 | |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 53 | struct gbproxy_config { |
| 54 | /* parsed from config file */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 55 | uint16_t nsip_sgsn_nsei; |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 56 | |
| 57 | /* misc */ |
| 58 | struct gprs_ns_inst *nsi; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 59 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 60 | /* Linked list of all Gb peers (except SGSN) */ |
| 61 | struct llist_head bts_peers; |
| 62 | |
Holger Hans Peter Freyther | a7027a0 | 2014-08-04 11:19:56 +0200 | [diff] [blame] | 63 | /* Counter */ |
| 64 | struct rate_ctr_group *ctrg; |
| 65 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 66 | /* force mcc/mnc */ |
| 67 | int core_mnc; |
| 68 | int core_mcc; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 69 | uint8_t* core_apn; |
| 70 | size_t core_apn_size; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 71 | char * match_re; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 72 | int tlli_max_age; |
| 73 | int tlli_max_len; |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 74 | |
| 75 | /* Experimental config */ |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 76 | int patch_ptmsi; |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 77 | int acquire_imsi; |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 78 | int route_to_sgsn2; |
| 79 | uint16_t nsip_sgsn2_nsei; |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 80 | |
| 81 | /* IMSI checking/matching */ |
| 82 | int check_imsi; |
| 83 | regex_t imsi_re_comp; |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 84 | |
| 85 | /* Used to generate identifiers */ |
| 86 | unsigned bss_ptmsi_state; |
| 87 | unsigned sgsn_tlli_state; |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 88 | }; |
| 89 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 90 | struct gbproxy_patch_state { |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 91 | int local_mnc; |
| 92 | int local_mcc; |
| 93 | |
| 94 | /* List of TLLIs for which patching is enabled */ |
| 95 | struct llist_head enabled_tllis; |
| 96 | int enabled_tllis_count; |
| 97 | }; |
| 98 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 99 | struct gbproxy_peer { |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 100 | struct llist_head list; |
| 101 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 102 | /* point back to the config */ |
| 103 | struct gbproxy_config *cfg; |
| 104 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 105 | /* NSEI of the peer entity */ |
| 106 | uint16_t nsei; |
| 107 | |
| 108 | /* BVCI used for Point-to-Point to this peer */ |
| 109 | uint16_t bvci; |
| 110 | int blocked; |
| 111 | |
| 112 | /* Routeing Area that this peer is part of (raw 04.08 encoding) */ |
| 113 | uint8_t ra[6]; |
| 114 | |
| 115 | /* Counter */ |
| 116 | struct rate_ctr_group *ctrg; |
| 117 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 118 | struct gbproxy_patch_state patch_state; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 119 | }; |
| 120 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 121 | struct gbproxy_tlli_state { |
| 122 | uint32_t current; |
| 123 | uint32_t assigned; |
| 124 | int bss_validated; |
| 125 | int net_validated; |
| 126 | |
| 127 | uint32_t ptmsi; |
| 128 | }; |
| 129 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 130 | struct gbproxy_tlli_info { |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 131 | struct llist_head list; |
| 132 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 133 | struct gbproxy_tlli_state tlli; |
| 134 | struct gbproxy_tlli_state sgsn_tlli; |
| 135 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 136 | time_t timestamp; |
Jacob Erlbeck | 2fd1ba4 | 2014-09-11 14:57:03 +0200 | [diff] [blame^] | 137 | uint8_t *imsi; |
| 138 | size_t imsi_len; |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 139 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 140 | int imsi_acq_pending; |
| 141 | struct llist_head stored_msgs; |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 142 | int imsi_acq_retries; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 143 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 144 | int enable_patching; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 145 | }; |
| 146 | |
| 147 | |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 148 | /* gb_proxy_vty .c */ |
| 149 | |
| 150 | int gbproxy_vty_init(void); |
| 151 | int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg); |
| 152 | |
| 153 | |
| 154 | /* gb_proxy.c */ |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 155 | int gbproxy_init_config(struct gbproxy_config *cfg); |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 156 | |
| 157 | /* Main input function for Gb proxy */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 158 | int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, uint16_t ns_bvci, uint16_t nsvci); |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 159 | |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 160 | int gbprox_signal(unsigned int subsys, unsigned int signal, |
| 161 | void *handler_data, void *signal_data); |
Harald Welte | 1ccbf44 | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 162 | |
| 163 | /* Reset all persistent NS-VC's */ |
| 164 | int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi); |
| 165 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 166 | void gbprox_reset(struct gbproxy_config *cfg); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 167 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 168 | /* TLLI state handling */ |
| 169 | void gbproxy_delete_tllis(struct gbproxy_peer *peer); |
Jacob Erlbeck | 18a3787 | 2014-09-08 09:59:16 +0200 | [diff] [blame] | 170 | int gbproxy_check_tlli( |
| 171 | struct gbproxy_peer *peer, |
| 172 | struct gbproxy_tlli_info *tlli_info); |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 173 | struct gbproxy_tlli_info *gbprox_find_tlli_by_ptmsi( |
| 174 | struct gbproxy_peer *peer, |
| 175 | uint32_t ptmsi); |
| 176 | uint32_t gbproxy_map_tlli( |
| 177 | uint32_t other_tlli, struct gbproxy_tlli_info *tlli_info, int to_bss); |
| 178 | struct gbproxy_tlli_info *gbproxy_update_tlli_state_ul( |
| 179 | struct gbproxy_peer *peer, time_t now, |
| 180 | struct gprs_gb_parse_context *parse_ctx); |
| 181 | struct gbproxy_tlli_info *gbproxy_update_tlli_state_dl( |
| 182 | struct gbproxy_peer *peer, time_t now, |
| 183 | struct gprs_gb_parse_context *parse_ctx); |
| 184 | void gbproxy_update_tlli_state_after( |
| 185 | struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| 186 | time_t now, struct gprs_gb_parse_context *parse_ctx); |
| 187 | int gbproxy_remove_stale_tllis(struct gbproxy_peer *peer, time_t now); |
| 188 | void gbproxy_delete_tlli(struct gbproxy_peer *peer, |
| 189 | struct gbproxy_tlli_info *tlli_info); |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 190 | void gbproxy_tlli_info_discard_messages(struct gbproxy_tlli_info *tlli_info); |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 191 | |
| 192 | struct gbproxy_tlli_info *gbproxy_register_tlli( |
| 193 | struct gbproxy_peer *peer, uint32_t tlli, |
| 194 | const uint8_t *imsi, size_t imsi_len, time_t now); |
| 195 | |
| 196 | struct gbproxy_tlli_info *gbproxy_find_tlli( |
| 197 | struct gbproxy_peer *peer, uint32_t tlli); |
Jacob Erlbeck | 2fd1ba4 | 2014-09-11 14:57:03 +0200 | [diff] [blame^] | 198 | struct gbproxy_tlli_info *gbproxy_find_tlli_by_imsi( |
| 199 | struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len); |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 200 | struct gbproxy_tlli_info *gbproxy_find_tlli_by_sgsn_tlli( |
| 201 | struct gbproxy_peer *peer, |
| 202 | uint32_t tlli); |
| 203 | struct gbproxy_tlli_info *gbproxy_find_tlli_by_ptmsi( |
| 204 | struct gbproxy_peer *peer, |
| 205 | uint32_t ptmsi); |
| 206 | |
| 207 | /* needed by gb_proxy_tlli.h */ |
| 208 | uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, uint32_t sgsn_ptmsi); |
| 209 | uint32_t gbproxy_make_sgsn_tlli( |
| 210 | struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| 211 | uint32_t bss_tlli); |
| 212 | int gbproxy_check_imsi( |
| 213 | struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len); |
| 214 | |
| 215 | /* Message patching */ |
| 216 | void gbproxy_patch_bssgp( |
| 217 | struct msgb *msg, uint8_t *bssgp, size_t bssgp_len, |
| 218 | struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 219 | int *len_change, struct gprs_gb_parse_context *parse_ctx); |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 220 | |
| 221 | int gbproxy_patch_llc( |
| 222 | struct msgb *msg, uint8_t *llc, size_t llc_len, |
| 223 | struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 224 | int *len_change, struct gprs_gb_parse_context *parse_ctx); |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 225 | |
| 226 | int gbproxy_set_patch_filter( |
| 227 | struct gbproxy_config *cfg, const char *filter, const char **err_msg); |
| 228 | void gbproxy_clear_patch_filter(struct gbproxy_config *cfg); |
| 229 | int gbproxy_check_imsi( |
| 230 | struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len); |
| 231 | |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 232 | /* Peer handling */ |
| 233 | struct gbproxy_peer *gbproxy_peer_by_bvci( |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 234 | struct gbproxy_config *cfg, uint16_t bvci); |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 235 | struct gbproxy_peer *gbproxy_peer_by_nsei( |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 236 | struct gbproxy_config *cfg, uint16_t nsei); |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 237 | struct gbproxy_peer *gbproxy_peer_by_rai( |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 238 | struct gbproxy_config *cfg, const uint8_t *ra); |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 239 | struct gbproxy_peer *gbproxy_peer_by_lai( |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 240 | struct gbproxy_config *cfg, const uint8_t *la); |
Jacob Erlbeck | 7fb26c2 | 2014-09-04 11:08:50 +0200 | [diff] [blame] | 241 | struct gbproxy_peer *gbproxy_peer_by_lac( |
| 242 | struct gbproxy_config *cfg, const uint8_t *la); |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 243 | struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv( |
Jacob Erlbeck | 48bb3a3 | 2014-09-01 11:55:11 +0200 | [diff] [blame] | 244 | struct gbproxy_config *cfg, struct tlv_parsed *tp); |
| 245 | struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci); |
| 246 | void gbproxy_peer_free(struct gbproxy_peer *peer); |
| 247 | int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci); |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 248 | |
Harald Welte | b77c697 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 249 | #endif |