Sylvain Munaut | 12ba778 | 2014-06-16 10:13:40 +0200 | [diff] [blame] | 1 | #pragma once |
Harald Welte | 9ba5005 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2 | |
Harald Welte | 8f9a3ee | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 3 | #include <stdint.h> |
| 4 | |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 5 | /* Our Implementation */ |
| 6 | #include <netinet/in.h> |
Pablo Neira Ayuso | ff66323 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 7 | #include <osmocom/core/linuxlist.h> |
| 8 | #include <osmocom/core/msgb.h> |
| 9 | #include <osmocom/core/timer.h> |
| 10 | #include <osmocom/core/select.h> |
Harald Welte | 605ac5d | 2012-06-16 16:09:52 +0800 | [diff] [blame] | 11 | #include <osmocom/gprs/gprs_msgb.h> |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 12 | |
Harald Welte | 8648e49 | 2012-06-17 13:12:51 +0800 | [diff] [blame] | 13 | #include <osmocom/gprs/protocol/gsm_08_16.h> |
| 14 | |
Harald Welte | fe4ab90 | 2010-05-12 17:19:53 +0000 | [diff] [blame] | 15 | #define NS_TIMERS_COUNT 7 |
| 16 | #define NS_TIMERS "(tns-block|tns-block-retries|tns-reset|tns-reset-retries|tns-test|tns-alive|tns-alive-retries)" |
| 17 | #define NS_TIMERS_HELP \ |
| 18 | "(un)blocking Timer (Tns-block) timeout\n" \ |
| 19 | "(un)blocking Timer (Tns-block) number of retries\n" \ |
| 20 | "Reset Timer (Tns-reset) timeout\n" \ |
| 21 | "Reset Timer (Tns-reset) number of retries\n" \ |
| 22 | "Test Timer (Tns-test) timeout\n" \ |
Holger Hans Peter Freyther | 887934e | 2011-11-05 15:14:59 +0100 | [diff] [blame] | 23 | "Alive Timer (Tns-alive) timeout\n" \ |
| 24 | "Alive Timer (Tns-alive) number of retries\n" |
Harald Welte | fe4ab90 | 2010-05-12 17:19:53 +0000 | [diff] [blame] | 25 | |
| 26 | enum ns_timeout { |
| 27 | NS_TOUT_TNS_BLOCK, |
| 28 | NS_TOUT_TNS_BLOCK_RETRIES, |
| 29 | NS_TOUT_TNS_RESET, |
| 30 | NS_TOUT_TNS_RESET_RETRIES, |
| 31 | NS_TOUT_TNS_TEST, |
| 32 | NS_TOUT_TNS_ALIVE, |
| 33 | NS_TOUT_TNS_ALIVE_RETRIES, |
| 34 | }; |
| 35 | |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 36 | #define NSE_S_BLOCKED 0x0001 |
| 37 | #define NSE_S_ALIVE 0x0002 |
Jacob Erlbeck | 5405a10 | 2013-10-24 01:33:23 +0200 | [diff] [blame] | 38 | #define NSE_S_RESET 0x0004 |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 39 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 40 | /*! \brief Osmocom NS link layer types */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 41 | enum gprs_ns_ll { |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 42 | GPRS_NS_LL_UDP, /*!< NS/UDP/IP */ |
| 43 | GPRS_NS_LL_E1, /*!< NS/E1 */ |
| 44 | GPRS_NS_LL_FR_GRE, /*!< NS/FR/GRE/IP */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 45 | }; |
| 46 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 47 | /*! \brief Osmoco NS events */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 48 | enum gprs_ns_evt { |
| 49 | GPRS_NS_EVT_UNIT_DATA, |
| 50 | }; |
| 51 | |
Jacob Erlbeck | 84cdc70 | 2013-10-08 12:04:44 +0200 | [diff] [blame] | 52 | /*! \brief Osmocom NS VC create status */ |
| 53 | enum gprs_ns_cs { |
| 54 | GPRS_NS_CS_CREATED, /*!< A NSVC object has been created */ |
| 55 | GPRS_NS_CS_FOUND, /*!< A NSVC object has been found */ |
| 56 | GPRS_NS_CS_REJECTED, /*!< Rejected and answered message */ |
| 57 | GPRS_NS_CS_SKIPPED, /*!< Skipped message */ |
| 58 | GPRS_NS_CS_ERROR, /*!< Failed to process message */ |
| 59 | }; |
| 60 | |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 61 | struct gprs_nsvc; |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 62 | /*! \brief Osmocom GPRS callback function type */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 63 | typedef int gprs_ns_cb_t(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, |
Harald Welte | 8f9a3ee | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 64 | struct msgb *msg, uint16_t bvci); |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 65 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 66 | /*! \brief An instance of the NS protocol stack */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 67 | struct gprs_ns_inst { |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 68 | /*! \brief callback to the user for incoming UNIT DATA IND */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 69 | gprs_ns_cb_t *cb; |
| 70 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 71 | /*! \brief linked lists of all NSVC in this instance */ |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 72 | struct llist_head gprs_nsvcs; |
| 73 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 74 | /*! \brief a NSVC object that's needed to deal with packets for |
| 75 | * unknown NSVC */ |
Harald Welte | dd1c83c | 2010-05-13 13:58:08 +0200 | [diff] [blame] | 76 | struct gprs_nsvc *unknown_nsvc; |
| 77 | |
Harald Welte | fe4ab90 | 2010-05-12 17:19:53 +0000 | [diff] [blame] | 78 | uint16_t timeout[NS_TIMERS_COUNT]; |
| 79 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 80 | /*! \brief NS-over-IP specific bits */ |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 81 | struct { |
Pablo Neira Ayuso | bfadfb7 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 82 | struct osmo_fd fd; |
Harald Welte | 7fb0523 | 2010-05-19 15:09:09 +0200 | [diff] [blame] | 83 | uint32_t local_ip; |
| 84 | uint16_t local_port; |
Holger Hans Peter Freyther | 2c3393d | 2013-03-25 11:59:58 +0100 | [diff] [blame] | 85 | int dscp; |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 86 | } nsip; |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 87 | /*! \brief NS-over-FR-over-GRE-over-IP specific bits */ |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 88 | struct { |
Pablo Neira Ayuso | bfadfb7 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 89 | struct osmo_fd fd; |
Harald Welte | 7fb0523 | 2010-05-19 15:09:09 +0200 | [diff] [blame] | 90 | uint32_t local_ip; |
Holger Hans Peter Freyther | 1e57eb6 | 2012-03-02 14:14:33 +0100 | [diff] [blame] | 91 | unsigned int enabled:1; |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 92 | } frgre; |
Harald Welte | 1203de3 | 2010-05-01 11:28:43 +0200 | [diff] [blame] | 93 | }; |
| 94 | |
Harald Welte | 8040545 | 2010-05-03 20:16:13 +0200 | [diff] [blame] | 95 | enum nsvc_timer_mode { |
| 96 | /* standard timers */ |
| 97 | NSVC_TIMER_TNS_TEST, |
| 98 | NSVC_TIMER_TNS_ALIVE, |
Harald Welte | 69a4cf2 | 2010-05-03 20:55:10 +0200 | [diff] [blame] | 99 | NSVC_TIMER_TNS_RESET, |
| 100 | _NSVC_TIMER_NR, |
Harald Welte | 8040545 | 2010-05-03 20:16:13 +0200 | [diff] [blame] | 101 | }; |
| 102 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 103 | /*! \brief Structure representing a single NS-VC */ |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 104 | struct gprs_nsvc { |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 105 | /*! \brief list of NS-VCs within NS Instance */ |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 106 | struct llist_head list; |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 107 | /*! \brief pointer to NS Instance */ |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 108 | struct gprs_ns_inst *nsi; |
| 109 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 110 | uint16_t nsei; /*! \brief end-to-end significance */ |
| 111 | uint16_t nsvci; /*! \brief uniquely identifies NS-VC at SGSN */ |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 112 | |
Harald Welte | 8f9a3ee | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 113 | uint32_t state; |
| 114 | uint32_t remote_state; |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 115 | |
Pablo Neira Ayuso | 2b15952 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 116 | struct osmo_timer_list timer; |
Harald Welte | 8040545 | 2010-05-03 20:16:13 +0200 | [diff] [blame] | 117 | enum nsvc_timer_mode timer_mode; |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 118 | int alive_retries; |
| 119 | |
Harald Welte | 2bffac5 | 2010-05-12 15:55:23 +0000 | [diff] [blame] | 120 | unsigned int remote_end_is_sgsn:1; |
| 121 | unsigned int persistent:1; |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 122 | unsigned int nsvci_is_valid:1; |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 123 | |
Harald Welte | 144e029 | 2010-05-13 11:45:07 +0200 | [diff] [blame] | 124 | struct rate_ctr_group *ctrg; |
| 125 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 126 | /*! \brief which link-layer are we based on? */ |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 127 | enum gprs_ns_ll ll; |
| 128 | |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 129 | union { |
| 130 | struct { |
| 131 | struct sockaddr_in bts_addr; |
| 132 | } ip; |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 133 | struct { |
| 134 | struct sockaddr_in bts_addr; |
| 135 | } frgre; |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 136 | }; |
| 137 | }; |
| 138 | |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 139 | /* Create a new NS protocol instance */ |
Harald Welte | 4fcdd76 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 140 | struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb, void *ctx); |
Harald Welte | 9ba5005 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 141 | |
Holger Hans Peter Freyther | c62a1bf | 2013-07-02 09:10:11 +0200 | [diff] [blame] | 142 | /* Close a NS protocol instance */ |
| 143 | void gprs_ns_close(struct gprs_ns_inst *nsi); |
| 144 | |
| 145 | /* Close and Destroy a NS protocol instance */ |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 146 | void gprs_ns_destroy(struct gprs_ns_inst *nsi); |
| 147 | |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 148 | /* Listen for incoming GPRS packets via NS/UDP */ |
Harald Welte | 7fb0523 | 2010-05-19 15:09:09 +0200 | [diff] [blame] | 149 | int gprs_ns_nsip_listen(struct gprs_ns_inst *nsi); |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 150 | |
Harald Welte | f543036 | 2012-06-17 12:25:53 +0800 | [diff] [blame] | 151 | /* Establish a connection (from the BSS) to the SGSN */ |
| 152 | struct gprs_nsvc *gprs_ns_nsip_connect(struct gprs_ns_inst *nsi, |
| 153 | struct sockaddr_in *dest, |
| 154 | uint16_t nsei, uint16_t nsvci); |
| 155 | |
| 156 | |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 157 | struct sockaddr_in; |
| 158 | |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 159 | /* main function for higher layers (BSSGP) to send NS messages */ |
Harald Welte | 24a655f | 2010-04-30 19:54:29 +0200 | [diff] [blame] | 160 | int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg); |
Harald Welte | f030b21 | 2010-04-26 19:18:54 +0200 | [diff] [blame] | 161 | |
Harald Welte | 834f26d | 2010-05-11 06:20:54 +0200 | [diff] [blame] | 162 | int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause); |
| 163 | int gprs_ns_tx_block(struct gprs_nsvc *nsvc, uint8_t cause); |
| 164 | int gprs_ns_tx_unblock(struct gprs_nsvc *nsvc); |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 165 | |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 166 | /* Listen for incoming GPRS packets via NS/FR/GRE */ |
Harald Welte | 7fb0523 | 2010-05-19 15:09:09 +0200 | [diff] [blame] | 167 | int gprs_ns_frgre_listen(struct gprs_ns_inst *nsi); |
Harald Welte | 3771d09 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 168 | |
Harald Welte | f543036 | 2012-06-17 12:25:53 +0800 | [diff] [blame] | 169 | struct gprs_nsvc *gprs_nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci); |
| 170 | void gprs_nsvc_delete(struct gprs_nsvc *nsvc); |
| 171 | struct gprs_nsvc *gprs_nsvc_by_nsei(struct gprs_ns_inst *nsi, uint16_t nsei); |
| 172 | struct gprs_nsvc *gprs_nsvc_by_nsvci(struct gprs_ns_inst *nsi, uint16_t nsvci); |
Harald Welte | 144e029 | 2010-05-13 11:45:07 +0200 | [diff] [blame] | 173 | |
Harald Welte | 731d1fc | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 174 | /* Initiate a RESET procedure (including timer start, ...)*/ |
Jacob Erlbeck | 0540d83 | 2014-10-08 11:47:36 +0200 | [diff] [blame] | 175 | int gprs_nsvc_reset(struct gprs_nsvc *nsvc, uint8_t cause); |
Harald Welte | 731d1fc | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 176 | |
Harald Welte | 2bffac5 | 2010-05-12 15:55:23 +0000 | [diff] [blame] | 177 | /* Add NS-specific VTY stuff */ |
| 178 | int gprs_ns_vty_init(struct gprs_ns_inst *nsi); |
| 179 | |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 180 | /* Resturn peer info as string (NOTE: the buffer is allocated statically) */ |
Jacob Erlbeck | 96550e0 | 2013-10-14 22:06:47 +0200 | [diff] [blame] | 181 | const char *gprs_ns_ll_str(struct gprs_nsvc *nsvc); |
| 182 | |
| 183 | /* Copy the link layer info from other into nsvc */ |
| 184 | void gprs_ns_ll_copy(struct gprs_nsvc *nsvc, struct gprs_nsvc *other); |
| 185 | |
| 186 | /* Clear the link layer info (will never match a real link then) */ |
| 187 | void gprs_ns_ll_clear(struct gprs_nsvc *nsvc); |
Jacob Erlbeck | 34fc470 | 2013-10-09 11:27:04 +0200 | [diff] [blame] | 188 | |
Holger Hans Peter Freyther | 4a90d22 | 2010-06-14 22:11:40 +0800 | [diff] [blame] | 189 | #define NS_ALLOC_SIZE 2048 |
Harald Welte | ba4c666 | 2010-05-19 15:38:10 +0200 | [diff] [blame] | 190 | #define NS_ALLOC_HEADROOM 20 |
| 191 | static inline struct msgb *gprs_ns_msgb_alloc(void) |
| 192 | { |
| 193 | return msgb_alloc_headroom(NS_ALLOC_SIZE, NS_ALLOC_HEADROOM, "GPRS/NS"); |
| 194 | } |
Harald Welte | b3ee265 | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 195 | |
Harald Welte | 4fcdd76 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 196 | enum signal_ns { |
| 197 | S_NS_RESET, |
| 198 | S_NS_BLOCK, |
| 199 | S_NS_UNBLOCK, |
| 200 | S_NS_ALIVE_EXP, /* Tns-alive expired more than N times */ |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 201 | S_NS_REPLACED, /* nsvc object is replaced (sets old_nsvc) */ |
Jacob Erlbeck | 5405a10 | 2013-10-24 01:33:23 +0200 | [diff] [blame] | 202 | S_NS_MISMATCH, /* got an unexpected IE (sets msg, pdu_type, ie_type) */ |
Harald Welte | 4fcdd76 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 203 | }; |
| 204 | |
| 205 | struct ns_signal_data { |
| 206 | struct gprs_nsvc *nsvc; |
Jacob Erlbeck | 5e6d679 | 2013-10-14 22:06:48 +0200 | [diff] [blame] | 207 | struct gprs_nsvc *old_nsvc; |
Harald Welte | 4fcdd76 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 208 | uint8_t cause; |
Jacob Erlbeck | 5405a10 | 2013-10-24 01:33:23 +0200 | [diff] [blame] | 209 | uint8_t pdu_type; |
| 210 | uint8_t ie_type; |
| 211 | struct msgb *msg; |
Harald Welte | 4fcdd76 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 212 | }; |
| 213 | |
Harald Welte | cca4963 | 2012-06-16 17:45:59 +0800 | [diff] [blame] | 214 | void gprs_ns_set_log_ss(int ss); |
| 215 | |
Harald Welte | a9f23c8 | 2011-11-23 15:01:31 +0100 | [diff] [blame] | 216 | /*! }@ */ |