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gprs_ns2.c File Reference
Libgb

GPRS Networks Service (NS) messages on the Gb interface. More...

`#include <stdlib.h>`
`#include <unistd.h>`
`#include <errno.h>`
`#include <stdint.h>`
`#include <sys/types.h>`
`#include <sys/socket.h>`
`#include <arpa/inet.h>`
`#include <osmocom/core/fsm.h>`
`#include <osmocom/core/logging.h>`
`#include <osmocom/core/msgb.h>`
`#include <osmocom/core/rate_ctr.h>`
`#include <osmocom/core/socket.h>`
`#include <osmocom/core/sockaddr_str.h>`
`#include <osmocom/core/stats.h>`
`#include <osmocom/core/stat_item.h>`
`#include <osmocom/core/talloc.h>`
`#include <osmocom/gprs/gprs_msgb.h>`
`#include <osmocom/gsm/prim.h>`
`#include <osmocom/gsm/tlv.h>`
`#include "gprs_ns2_internal.h"`

## Macros

#define | ns_set_state(ns_, st_)
#define | ns_set_remote_state(ns_, st_)
#define | ns_mark_blocked(ns_)
#define | ns_mark_unblocked(ns_)
#define | ns_mark_alive(ns_)
#define | ns_mark_dead(ns_)
#define | NS2_LL_MAX_STR 4+2*(INET6_ADDRSTRLEN+9)+8

## Functions

char * | gprs_ns2_ll_str_buf (char *buf, size_t buf_len, struct gprs_ns2_vc *nsvc)
| string-format a given NS-VC into a user-supplied buffer.
const char * | gprs_ns2_ll_str (struct gprs_ns2_vc *nsvc)
| string-format a given NS-VC to a thread-local static buffer.
char * | gprs_ns2_ll_str_c (const void *ctx, struct gprs_ns2_vc *nsvc)
| string-format a given NS-VC to a dynamically allocated string.
const char * | gprs_ns2_nsvc_state_name (struct gprs_ns2_vc *nsvc)
| Return the current state name of a given NS-VC to a thread-local static buffer.
static struct gprs_ns2_vc * | ns2_load_sharing_signal (struct gprs_ns2_nse *nse)
static struct gprs_ns2_vc * | ns2_load_sharing_modulo (struct gprs_ns2_nse *nse, uint16_t bvci, uint32_t load_selector)
static struct gprs_ns2_vc * | ns2_load_sharing_weight_modulo (struct gprs_ns2_nse *nse, uint16_t bvci, uint32_t load_selector)
struct gprs_ns2_vc * | ns2_load_sharing_first (struct gprs_ns2_nse *nse)
static struct gprs_ns2_vc * | ns2_load_sharing (struct gprs_ns2_nse *nse, uint16_t bvci, uint32_t link_selector)
int | gprs_ns2_recv_prim (struct gprs_ns2_inst *nsi, struct osmo_prim_hdr *oph)
| Receive a primitive from the NS User (Gb).
void | ns2_prim_status_ind (struct gprs_ns2_nse *nse, struct gprs_ns2_vc *nsvc, uint16_t bvci, enum gprs_ns2_affecting_cause cause)
| Send a STATUS.ind primitive to the specified NS instance user.
struct gprs_ns2_vc * | ns2_vc_alloc (struct gprs_ns2_vc_bind *bind, struct gprs_ns2_nse *nse, bool initiater, enum gprs_ns2_vc_mode vc_mode, const char *id)
| Allocate a NS-VC within the given bind + NSE.
void | gprs_ns2_free_nsvc (struct gprs_ns2_vc *nsvc)
| Destroy/release given NS-VC.
void | ns2_free_nsvcs (struct gprs_ns2_nse *nse)
void | gprs_ns2_free_nsvcs (struct gprs_ns2_nse *nse)
| Destroy/release all NS-VC of given NSE.
struct msgb * | ns2_msgb_alloc (void)
| Allocate a message buffer for use with the NS2 stack.
static int | reject_status_msg (struct msgb *orig_msg, struct tlv_parsed *tp, struct msgb **reject, enum ns_cause cause)
| Create a status message to be sent over a new connection.
struct gprs_ns2_nse * | gprs_ns2_nse_by_nsei (struct gprs_ns2_inst *nsi, uint16_t nsei)
| Resolve a NS Entity based on its NSEI.
struct gprs_ns2_vc * | gprs_ns2_nsvc_by_nsvci (struct gprs_ns2_inst *nsi, uint16_t nsvci)
| Resolve a NS-VC Entity based on its NS-VCI.
struct gprs_ns2_nse * | gprs_ns2_create_nse2 (struct gprs_ns2_inst *nsi, uint16_t nsei, enum gprs_ns2_ll linklayer, enum gprs_ns2_dialect dialect, bool ip_sns_role_sgsn)
| Create a NS Entity within given NS instance.
int | ns2_nse_set_dialect (struct gprs_ns2_nse *nse, enum gprs_ns2_dialect dialect)
struct gprs_ns2_nse * | gprs_ns2_create_nse (struct gprs_ns2_inst *nsi, uint16_t nsei, enum gprs_ns2_ll linklayer, enum gprs_ns2_dialect dialect)
| Create a NS Entity within given NS instance.
uint16_t | gprs_ns2_nse_nsei (struct gprs_ns2_nse *nse)
| Return the NSEI.
void | gprs_ns2_free_nse (struct gprs_ns2_nse *nse)
| Destroy given NS Entity.
void | gprs_ns2_free_nses (struct gprs_ns2_inst *nsi)
static int | ns2_tlv_parse (struct tlv_parsed *dec, const uint8_t *buf, int buf_len, uint8_t lv_tag, uint8_t lv_tag2)
static enum ns2_cs | ns2_create_vc_sns (struct gprs_ns2_vc_bind *bind, const struct osmo_sockaddr *remote, struct gprs_ns2_vc **success, uint16_t nsei)
enum ns2_cs | ns2_create_vc (struct gprs_ns2_vc_bind *bind, struct msgb *msg, const struct osmo_sockaddr *remote, const char *logname, struct msgb **reject, struct gprs_ns2_vc **success)
| Create a new NS-VC based on a [received] message.
struct gprs_ns2_vc * | gprs_ns2_ip_connect_inactive (struct gprs_ns2_vc_bind *bind, const struct osmo_sockaddr *remote, struct gprs_ns2_nse *nse, uint16_t nsvci)
| Create, and connect an inactive, new IP-based NS-VC.
struct gprs_ns2_vc * | gprs_ns2_ip_connect (struct gprs_ns2_vc_bind *bind, const struct osmo_sockaddr *remote, struct gprs_ns2_nse *nse, uint16_t nsvci)
| Create, connect and activate a new IP-based NS-VC.
struct gprs_ns2_vc * | gprs_ns2_ip_connect2 (struct gprs_ns2_vc_bind *bind, const struct osmo_sockaddr *remote, uint16_t nsei, uint16_t nsvci, enum gprs_ns2_dialect dialect)
| Create, connect and activate a new IP-based NS-VC.
struct gprs_ns2_vc * | gprs_ns2_nsvc_by_sockaddr_nse (struct gprs_ns2_nse *nse, const struct osmo_sockaddr *sockaddr)
| Find NS-VC for given socket address.
int | gprs_ns2_nse_foreach_nsvc (struct gprs_ns2_nse *nse, gprs_ns2_foreach_nsvc_cb cb, void *cb_data)
| Iterate over all nsvc of a NS Entity and call the callback.
int | ns2_recv_vc (struct gprs_ns2_vc *nsvc, struct msgb *msg)
| Bottom-side entry-point for received NS PDU from the driver/bind.
void | ns2_nse_data_sum (struct gprs_ns2_nse *nse)
void | ns2_nse_notify_unblocked (struct gprs_ns2_vc *nsvc, bool unblocked)
| Notify a nse about the change of a NS-VC.
struct gprs_ns2_inst * | gprs_ns2_instantiate (void *ctx, osmo_prim_cb cb, void *cb_data)
| Create a new GPRS NS instance.
void | gprs_ns2_free (struct gprs_ns2_inst *nsi)
| Destroy a NS Instance (including all its NSEs, binds, ...).
void | gprs_ns2_start_alive_all_nsvcs (struct gprs_ns2_nse *nse)
| Start the NS-ALIVE FSM in all NS-VCs of given NSE.
void | gprs_ns2_free_bind (struct gprs_ns2_vc_bind *bind)
| Destroy a given bind.
void | gprs_ns2_free_binds (struct gprs_ns2_inst *nsi)
struct gprs_ns2_vc_bind * | gprs_ns2_bind_by_name (struct gprs_ns2_inst *nsi, const char *name)
| Search for a bind with a unique name.
enum gprs_ns2_vc_mode | ns2_dialect_to_vc_mode (enum gprs_ns2_dialect dialect)
static void | add_bind_array (struct gprs_ns2_vc_bind **array, struct gprs_ns2_vc_bind *bind, int size)
void | ns2_nse_update_mtu (struct gprs_ns2_nse *nse)
int | ns2_count_transfer_cap (struct gprs_ns2_nse *nse, uint16_t bvci)
| calculate the transfer capabilities for a nse
int | ns2_bind_alloc (struct gprs_ns2_inst *nsi, const char *name, struct gprs_ns2_vc_bind **result)
| common allocation + low-level initialization of a bind.

## Variables

static const struct tlv_definition | ns_att_tlvdef1
static const struct tlv_definition | ns_att_tlvdef2
const struct value_string | gprs_ns2_cause_strs []
static const struct rate_ctr_desc | ns_ctr_description []
static const struct rate_ctr_group_desc | nse_ctrg_desc
static const struct rate_ctr_group_desc | nsvc_ctrg_desc
static const struct osmo_stat_item_desc | nsvc_stat_description []
static const struct osmo_stat_item_group_desc | nsvc_statg_desc
const struct osmo_stat_item_desc | nsbind_stat_description []
static const struct osmo_stat_item_group_desc | nsbind_statg_desc
const struct value_string | gprs_ns2_aff_cause_prim_strs []
const struct value_string | gprs_ns2_prim_strs []
const struct value_string | gprs_ns2_lltype_strs []

## Detailed Description

GPRS Networks Service (NS) messages on the Gb interface.

3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) as well as its successor 3GPP TS 48.016