gprs_ns2_message.c File Reference

NS-over-FR-over-GRE implementation. More...

#include <errno.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/core/stat_item.h>
#include <osmocom/core/stats.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/gprs/gprs_msgb.h>
#include <osmocom/gprs/gprs_ns2.h>
#include <osmocom/gprs/protocol/gsm_08_16.h>
#include "gprs_ns2_internal.h"

Macros
#define	ERR_IF_NSVC_USES_SNS(nsvc, reason)

Functions
static int	ns2_validate_reset (struct gprs_ns2_vc *nsvc, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
static int	ns2_validate_reset_ack (struct gprs_ns2_vc *nsvc, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
static int	ns2_validate_block (struct gprs_ns2_vc *nsvc, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
static int	ns2_validate_block_ack (struct gprs_ns2_vc *nsvc, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
static int	ns2_validate_status (struct gprs_ns2_vc *nsvc, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
int	ns2_validate (struct gprs_ns2_vc *nsvc, uint8_t pdu_type, struct msgb *msg, struct tlv_parsed *tp, uint8_t *cause)
static int	ns_vc_tx (struct gprs_ns2_vc *nsvc, struct msgb *msg)
static int	ns2_tx_simple (struct gprs_ns2_vc *nsvc, uint8_t pdu_type)
int	ns2_tx_block (struct gprs_ns2_vc *nsvc, uint8_t cause)
	Transmit a NS-BLOCK on a given NS-VC. More...
int	ns2_tx_block_ack (struct gprs_ns2_vc *nsvc)
	Transmit a NS-BLOCK-ACK on a given NS-VC. More...
int	ns2_tx_reset (struct gprs_ns2_vc *nsvc, uint8_t cause)
	Transmit a NS-RESET on a given NS-VC. More...
int	ns2_tx_reset_ack (struct gprs_ns2_vc *nsvc)
	Transmit a NS-RESET-ACK on a given NS-VC. More...
int	ns2_tx_unblock (struct gprs_ns2_vc *nsvc)
	Transmit a NS-UNBLOCK on a given NS-VC. More...
int	ns2_tx_unblock_ack (struct gprs_ns2_vc *nsvc)
	Transmit a NS-UNBLOCK-ACK on a given NS-VC. More...
int	ns2_tx_alive (struct gprs_ns2_vc *nsvc)
	Transmit a NS-ALIVE on a given NS-VC. More...
int	ns2_tx_alive_ack (struct gprs_ns2_vc *nsvc)
	Transmit a NS-ALIVE-ACK on a given NS-VC. More...
int	ns2_tx_unit_data (struct gprs_ns2_vc *nsvc, uint16_t bvci, uint8_t sducontrol, struct msgb *msg)
	Transmit NS-UNITDATA on a given NS-VC. More...
int	ns2_tx_status (struct gprs_ns2_vc *nsvc, uint8_t cause, uint16_t bvci, struct msgb *orig_msg)
	Transmit a NS-STATUS on a given NS-VC. More...
static int	ns2_tx_sns_procedure (struct gprs_ns2_vc *nsvc, enum ns_pdu_type pdu, uint8_t trans_id, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-ADD/SNS-CHANGE-WEIGHT as per Section 9.3.2/9.3.3. More...
int	ns2_tx_sns_add (struct gprs_ns2_vc *nsvc, uint8_t trans_id, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-ADD as per Section 9.3.2. More...
int	ns2_tx_sns_change_weight (struct gprs_ns2_vc *nsvc, uint8_t trans_id, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-CHANGE-WEIGHT as per Section 9.3.3. More...
int	ns2_tx_sns_del (struct gprs_ns2_vc *nsvc, uint8_t trans_id, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-DEL as per Section 9.3.6. More...
int	ns2_tx_sns_ack (struct gprs_ns2_vc *nsvc, uint8_t trans_id, uint8_t *cause, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-ACK as per Section 9.3.1. More...
int	ns2_tx_sns_config (struct gprs_ns2_vc *nsvc, bool end_flag, const struct gprs_ns_ie_ip4_elem *ip4_elems, unsigned int num_ip4_elems, const struct gprs_ns_ie_ip6_elem *ip6_elems, unsigned int num_ip6_elems)
	Encode + Transmit a SNS-CONFIG as per Section 9.3.4. More...
int	ns2_tx_sns_config_ack (struct gprs_ns2_vc *nsvc, uint8_t *cause)
	Encode + Transmit a SNS-CONFIG-ACK as per Section 9.3.5. More...
int	ns2_tx_sns_size (struct gprs_ns2_vc *nsvc, bool reset_flag, uint16_t max_nr_nsvc, int ip4_ep_nr, int ip6_ep_nr)
	Encode + transmit a SNS-SIZE as per Section 9.3.7. More...
int	ns2_tx_sns_size_ack (struct gprs_ns2_vc *nsvc, uint8_t *cause)
	Encode + Transmit a SNS-SIZE-ACK as per Section 9.3.8. More...

Detailed Description

NS-over-FR-over-GRE implementation.

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

Macro Definition Documentation

#define ERR_IF_NSVC_USES_SNS	(		nsvc,
			reason
	)

Value:

do {                                                                            \
		if (!nsvc->nse->bss_sns_fi)                                           \
                        break;                                                          \
		LOGNSVC(nsvc, LOGL_DEBUG, "invalid packet %s with SNS\n", reason);    \
        } while (0)

Referenced by ns2_tx_block(), ns2_tx_block_ack(), ns2_tx_reset(), ns2_tx_reset_ack(), ns2_tx_unblock(), and ns2_tx_unblock_ack().

Function Documentation

int ns2_tx_alive

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-ALIVE on a given NS-VC.

Parameters

[in]

nsvc

NS-VC on which the NS-ALIVE is to be transmitted

Returns

0 in case of success

References LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, log_set_context(), ns2_tx_simple(), NS_PDUT_ALIVE, and gprs_ns2_vc::nse.

Referenced by alive_timeout_handler(), and start_test_procedure().

int ns2_tx_alive_ack

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-ALIVE-ACK on a given NS-VC.

Parameters

[in]

nsvc

NS-VC on which the NS-ALIVE-ACK is to be transmitted

Returns

0 in case of success

References LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, log_set_context(), ns2_tx_simple(), NS_PDUT_ALIVE_ACK, and gprs_ns2_vc::nse.

Referenced by ns2_vc_fsm_allstate_action().

int ns2_tx_block	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	cause
	)

Transmit a NS-BLOCK on a given NS-VC.

Parameters

[in]	vc	NS-VC on which the NS-BLOCK is to be transmitted
[in]	cause	Numeric NS Cause value

Returns

0 in case of success

References gprs_ns2_vc::ctrg, ERR_IF_NSVC_USES_SNS, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_INFO, msg, msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_CTR_BLOCKED, NS_IE_CAUSE, NS_IE_VCI, NS_PDUT_BLOCK, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_vc::nsvci, osmo_htons, gprs_ns_hdr::pdu_type, rate_ctr_group_get_ctr(), and rate_ctr_inc().

Referenced by ns2_st_blocked(), and ns2_st_blocked_onenter().

int ns2_tx_block_ack

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-BLOCK-ACK on a given NS-VC.

Parameters

[in]

nsvc

NS-VC on which the NS-BLOCK is to be transmitted

Returns

0 in case of success

References ERR_IF_NSVC_USES_SNS, msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_TX_SIGNAL, log_set_context(), msg, msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_VCI, NS_PDUT_BLOCK_ACK, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_vc::nsvci, osmo_htons, and gprs_ns_hdr::pdu_type.

Referenced by ns2_st_blocked(), and ns2_st_unblocked().

int ns2_tx_reset	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	cause
	)

Transmit a NS-RESET on a given NS-VC.

Parameters

[in]

nsvc

NS-VC used for transmission [in] cause Numeric NS cause value

Returns

0 in case of success

References ERR_IF_NSVC_USES_SNS, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_INFO, msg, msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_CAUSE, NS_IE_NSEI, NS_IE_VCI, NS_PDUT_RESET, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, gprs_ns2_vc::nsvci, osmo_htons, and gprs_ns_hdr::pdu_type.

Referenced by ns2_st_reset_onenter().

int ns2_tx_reset_ack

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-RESET-ACK on a given NS-VC.

Parameters

[in]

nsvc

NS-VC used for transmission

Returns

0 in case of success

References ERR_IF_NSVC_USES_SNS, msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_TX_SIGNAL, log_set_context(), msg, msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_NSEI, NS_IE_VCI, NS_PDUT_RESET_ACK, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, gprs_ns2_vc::nsvci, osmo_htons, and gprs_ns_hdr::pdu_type.

Referenced by ns2_st_reset(), and ns2_vc_rx().

static int ns2_tx_simple ( struct gprs_ns2_vc *  nsvc, uint8_t  pdu_type  )

static

References msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_TX_SIGNAL, log_set_context(), msg, msgb_put(), ns2_msgb_alloc(), ns_vc_tx(), gprs_ns2_vc::nse, and gprs_ns_hdr::pdu_type.

Referenced by ns2_tx_alive(), ns2_tx_alive_ack(), ns2_tx_unblock(), and ns2_tx_unblock_ack().

int ns2_tx_sns_ack	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	trans_id,
		uint8_t *	cause,
		const struct gprs_ns_ie_ip4_elem *	ip4_elems,
		unsigned int	num_ip4_elems,
		const struct gprs_ns_ie_ip6_elem *	ip6_elems,
		unsigned int	num_ip6_elems
	)

Encode + Transmit a SNS-ACK as per Section 9.3.1.

Parameters

[in]	nsvc	NS-VC through which to transmit the ACK
[in]	trans_id	Transaction ID which to acknowledge
[in]	cause	Pointer to cause value (NULL if no cause to be sent)
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tvlv_put(), msgb_v_put(), ns2_msgb_alloc(), NS_IE_CAUSE, NS_IE_IPv4_LIST, NS_IE_IPv6_LIST, NS_IE_NSEI, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, gprs_ns_hdr::pdu_type, and SNS_PDUT_ACK.

Referenced by ns2_sns_st_configured_add(), ns2_sns_st_configured_change(), and ns2_sns_st_configured_delete().

int ns2_tx_sns_add	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	trans_id,
		const struct gprs_ns_ie_ip4_elem *	ip4_elems,
		unsigned int	num_ip4_elems,
		const struct gprs_ns_ie_ip6_elem *	ip6_elems,
		unsigned int	num_ip6_elems
	)

Encode + Transmit a SNS-ADD as per Section 9.3.2.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG
[in]	trans_id	The transaction id
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems
[in]	ip6_elems	Array of IPv6 Elements
[in]	num_ip6_elems	number of ip6_elems

Returns

0 on success; negative in case of error

References ns2_tx_sns_procedure(), and SNS_PDUT_ADD.

int ns2_tx_sns_change_weight	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	trans_id,
		const struct gprs_ns_ie_ip4_elem *	ip4_elems,
		unsigned int	num_ip4_elems,
		const struct gprs_ns_ie_ip6_elem *	ip6_elems,
		unsigned int	num_ip6_elems
	)

Encode + Transmit a SNS-CHANGE-WEIGHT as per Section 9.3.3.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG
[in]	trans_id	The transaction id
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems
[in]	ip6_elems	Array of IPv6 Elements
[in]	num_ip6_elems	number of ip6_elems

Returns

0 on success; negative in case of error

References ns2_tx_sns_procedure(), and SNS_PDUT_CHANGE_WEIGHT.

int ns2_tx_sns_config	(	struct gprs_ns2_vc *	nsvc,
		bool	end_flag,
		const struct gprs_ns_ie_ip4_elem *	ip4_elems,
		unsigned int	num_ip4_elems,
		const struct gprs_ns_ie_ip6_elem *	ip6_elems,
		unsigned int	num_ip6_elems
	)

Encode + Transmit a SNS-CONFIG as per Section 9.3.4.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG
[in]	end_flag	Whether or not this is the last SNS-CONFIG
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tvlv_put(), msgb_v_put(), ns2_msgb_alloc(), NS_IE_IPv4_LIST, NS_IE_IPv6_LIST, NS_IE_NSEI, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, gprs_ns_hdr::pdu_type, and SNS_PDUT_CONFIG.

Referenced by ns2_sns_st_bss_config_bss_onenter(), and ns2_sns_st_sgsn_wait_config_ack_onenter().

int ns2_tx_sns_config_ack	(	struct gprs_ns2_vc *	nsvc,
		uint8_t *	cause
	)

Encode + Transmit a SNS-CONFIG-ACK as per Section 9.3.5.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG-ACK
[in]	cause	Pointer to cause value (NULL if no cause to be sent)

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_TX_SIGNAL, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_CAUSE, NS_IE_NSEI, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, gprs_ns_hdr::pdu_type, and SNS_PDUT_CONFIG_ACK.

Referenced by ns2_sns_st_bss_config_sgsn(), and ns2_sns_st_sgsn_wait_config().

int ns2_tx_sns_del	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	trans_id,
		const struct gprs_ns_ie_ip4_elem *	ip4_elems,
		unsigned int	num_ip4_elems,
		const struct gprs_ns_ie_ip6_elem *	ip6_elems,
		unsigned int	num_ip6_elems
	)

Encode + Transmit a SNS-DEL as per Section 9.3.6.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG
[in]	trans_id	The transaction id
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems
[in]	ip6_elems	Array of IPv6 Elements
[in]	num_ip6_elems	number of ip6_elems

Returns

0 on success; negative in case of error

References ns2_tx_sns_procedure(), and SNS_PDUT_DELETE.

static int ns2_tx_sns_procedure ( struct gprs_ns2_vc *  nsvc, enum ns_pdu_type  pdu, uint8_t  trans_id, const struct gprs_ns_ie_ip4_elem *  ip4_elems, unsigned int  num_ip4_elems, const struct gprs_ns_ie_ip6_elem *  ip6_elems, unsigned int  num_ip6_elems  )

static

Encode + Transmit a SNS-ADD/SNS-CHANGE-WEIGHT as per Section 9.3.2/9.3.3.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-CONFIG
[in]	pdu	The PDU type to send out
[in]	trans_id	The transaction id
[in]	ip4_elems	Array of IPv4 Elements
[in]	num_ip4_elems	number of ip4_elems
[in]	ip6_elems	Array of IPv6 Elements
[in]	num_ip6_elems	number of ip6_elems

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, log_set_context(), LOGL_ERROR, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tvlv_put(), msgb_v_put(), ns2_msgb_alloc(), NS_IE_IPv4_LIST, NS_IE_IPv6_LIST, NS_IE_NSEI, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, and gprs_ns_hdr::pdu_type.

Referenced by ns2_tx_sns_add(), ns2_tx_sns_change_weight(), and ns2_tx_sns_del().

int ns2_tx_sns_size	(	struct gprs_ns2_vc *	nsvc,
		bool	reset_flag,
		uint16_t	max_nr_nsvc,
		int	ip4_ep_nr,
		int	ip6_ep_nr
	)

Encode + transmit a SNS-SIZE as per Section 9.3.7.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-SIZE
[in]	reset_flag	Whether or not to add a RESET flag
[in]	max_nr_nsvc	Maximum number of NS-VCs
[in]	ip4_ep_nr	Number of IPv4 endpoints (< 0 will omit the TLV)
[in]	ip6_ep_nr	Number of IPv6 endpoints (< 0 will omit the TLV)

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tv16_put(), msgb_tv_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_IPv4_EP_NR, NS_IE_IPv6_EP_NR, NS_IE_MAX_NR_NSVC, NS_IE_NSEI, NS_IE_RESET_FLAG, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, gprs_ns_hdr::pdu_type, and SNS_PDUT_SIZE.

Referenced by ns2_sns_st_bss_size_onenter().

int ns2_tx_sns_size_ack	(	struct gprs_ns2_vc *	nsvc,
		uint8_t *	cause
	)

Encode + Transmit a SNS-SIZE-ACK as per Section 9.3.8.

Parameters

[in]	nsvc	NS-VC through which to transmit the SNS-SIZE-ACK
[in]	cause	Pointer to cause value (NULL if no cause to be sent)

Returns

0 on success; negative in case of error

References gprs_ns2_nse::bss_sns_fi, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msg, msgb_free(), msgb_put(), msgb_tvlv_put(), ns2_msgb_alloc(), NS_IE_CAUSE, NS_IE_NSEI, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_nse::nsei, nsei, osmo_htons, gprs_ns_hdr::pdu_type, and SNS_PDUT_SIZE_ACK.

Referenced by ns2_sns_st_all_action_sgsn().

int ns2_tx_status	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	cause,
		uint16_t	bvci,
		struct msgb *	orig_msg
	)

Transmit a NS-STATUS on a given NS-VC.

Parameters

[in]	nsvc	NS-VC to be used for transmission
[in]	cause	Numeric NS cause value
[in]	bvci	BVCI to be reset within NSVC
[in]	orig_msg	message causing the STATUS

Returns

0 in case of success

References gprs_ns2_vc::bind, gprs_ns2_cause_str(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_SIGNAL, log_set_context(), LOGL_INFO, msg, msgb_l2len(), msgb_length(), msgb_put(), msgb_tvlv_put(), gprs_ns2_vc_bind::mtu, ns2_msgb_alloc(), NS_CAUSE_BVCI_UNKNOWN, NS_CAUSE_INVAL_ESSENT_IE, NS_CAUSE_MISSING_ESSENT_IE, NS_CAUSE_NSVC_BLOCKED, NS_CAUSE_NSVC_UNKNOWN, NS_CAUSE_PDU_INCOMP_PSTATE, NS_CAUSE_PROTO_ERR_UNSPEC, NS_CAUSE_SEM_INCORR_PDU, NS_IE_CAUSE, NS_IE_PDU, NS_IE_VCI, NS_PDUT_STATUS, ns_vc_tx(), gprs_ns2_vc::nse, gprs_ns2_vc::nsvci, osmo_htons, gprs_ns_hdr::pdu_type, and TVLV_GROSS_LEN().

Referenced by ns2_vc_fsm_allstate_action(), and ns2_vc_rx().

int ns2_tx_unblock

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-UNBLOCK on a given NS-VC.

Parameters

[in]

nsvc

NS-VC on which the NS-UNBLOCK is to be transmitted

Returns

0 in case of success

References ERR_IF_NSVC_USES_SNS, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, log_set_context(), ns2_tx_simple(), NS_PDUT_UNBLOCK, and gprs_ns2_vc::nse.

Referenced by ns2_st_blocked_onenter().

int ns2_tx_unblock_ack

(

struct gprs_ns2_vc *

nsvc

)

Transmit a NS-UNBLOCK-ACK on a given NS-VC.

Parameters

[in]

nsvc

NS-VC on which the NS-UNBLOCK-ACK is to be transmitted

Returns

0 in case of success

References ERR_IF_NSVC_USES_SNS, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, log_set_context(), ns2_tx_simple(), NS_PDUT_UNBLOCK_ACK, and gprs_ns2_vc::nse.

Referenced by ns2_st_blocked(), and ns2_st_unblocked().

int ns2_tx_unit_data	(	struct gprs_ns2_vc *	nsvc,
		uint16_t	bvci,
		uint8_t	sducontrol,
		struct msgb *	msg
	)

Transmit NS-UNITDATA on a given NS-VC.

Parameters

[in]	nsvc	NS-VC on which the NS-UNITDATA is to be transmitted
[in]	bvci	BVCI to encode in NS-UNITDATA header
[in]	sducontrol	SDU control octet of NS header
[in]	msg	message buffer containing payload

Returns

0 in case of success

References gprs_ns_hdr::data, if(), msgb::l2h, LOG_CTX_GB_NSE, LOG_CTX_GB_NSVC, LOG_NS_DATA, log_set_context(), LOGL_ERROR, LOGL_INFO, LOGNSVC, msgb_free(), msgb_push(), NS_PDUT_UNITDATA, ns_vc_tx(), gprs_ns2_vc::nse, and gprs_ns_hdr::pdu_type.

Referenced by gprs_ns2_recv_prim().

int ns2_validate	(	struct gprs_ns2_vc *	nsvc,
		uint8_t	pdu_type,
		struct msgb *	msg,
		struct tlv_parsed *	tp,
		uint8_t *	cause
	)

References msgb_l2len(), ns2_validate_block(), ns2_validate_block_ack(), ns2_validate_reset(), ns2_validate_reset_ack(), ns2_validate_status(), NS_CAUSE_PROTO_ERR_UNSPEC, NS_PDUT_ALIVE, NS_PDUT_ALIVE_ACK, NS_PDUT_BLOCK, NS_PDUT_BLOCK_ACK, NS_PDUT_RESET, NS_PDUT_RESET_ACK, NS_PDUT_STATUS, NS_PDUT_UNBLOCK, and NS_PDUT_UNBLOCK_ACK.

Referenced by ns2_vc_rx().

static int ns2_validate_block ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg, struct tlv_parsed *  tp, uint8_t *  cause  )

static

References NS_CAUSE_MISSING_ESSENT_IE, NS_IE_CAUSE, NS_IE_VCI, and TLVP_PRES_LEN.

Referenced by ns2_validate().

static int ns2_validate_block_ack ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg, struct tlv_parsed *  tp, uint8_t *  cause  )

static

References NS_CAUSE_MISSING_ESSENT_IE, NS_IE_VCI, and TLVP_PRES_LEN.

Referenced by ns2_validate().

static int ns2_validate_reset ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg, struct tlv_parsed *  tp, uint8_t *  cause  )

static

References NS_CAUSE_MISSING_ESSENT_IE, NS_IE_CAUSE, NS_IE_NSEI, NS_IE_VCI, and TLVP_PRES_LEN.

Referenced by ns2_validate().

static int ns2_validate_reset_ack ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg, struct tlv_parsed *  tp, uint8_t *  cause  )

static

References NS_CAUSE_MISSING_ESSENT_IE, NS_IE_NSEI, NS_IE_VCI, and TLVP_PRES_LEN.

Referenced by ns2_validate().

static int ns2_validate_status ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg, struct tlv_parsed *  tp, uint8_t *  cause  )

static

References NS_CAUSE_BVCI_UNKNOWN, NS_CAUSE_INVAL_ESSENT_IE, NS_CAUSE_MISSING_ESSENT_IE, NS_CAUSE_NSVC_BLOCKED, NS_CAUSE_NSVC_UNKNOWN, NS_CAUSE_PDU_INCOMP_PSTATE, NS_CAUSE_PROTO_ERR_UNSPEC, NS_CAUSE_SEM_INCORR_PDU, NS_CAUSE_UNKN_IP_TEST_FAILED, NS_IE_BVCI, NS_IE_CAUSE, NS_IE_IPv4_LIST, NS_IE_IPv6_LIST, NS_IE_VCI, TLVP_PRES_LEN, TLVP_PRESENT, and tlvp_val8().

Referenced by ns2_validate().

static int ns_vc_tx ( struct gprs_ns2_vc *  nsvc, struct msgb *  msg  )

static

References gprs_ns2_vc::bind, msgb_length(), NS_CTR_BYTES_OUT, NS_CTR_BYTES_OUT_DROP, NS_CTR_PKTS_OUT, NS_CTR_PKTS_OUT_DROP, RATE_CTR_ADD_NS, RATE_CTR_INC_NS, and gprs_ns2_vc_bind::send_vc.

Referenced by ns2_tx_block(), ns2_tx_block_ack(), ns2_tx_reset(), ns2_tx_reset_ack(), ns2_tx_simple(), ns2_tx_sns_ack(), ns2_tx_sns_config(), ns2_tx_sns_config_ack(), ns2_tx_sns_procedure(), ns2_tx_sns_size(), ns2_tx_sns_size_ack(), ns2_tx_status(), and ns2_tx_unit_data().