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#ifndef _INT_SNDCP_H
#define _INT_SNDCP_H
#include <stdint.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/gsm/gsm48.h>
struct gprs_llc_lle;
/* A fragment queue header, maintaining list of fragments for one N-PDU */
struct defrag_state {
/* PDU number for which the defragmentation state applies */
uint16_t npdu;
/* highest segment number we have received so far */
uint8_t highest_seg;
/* bitmask of the segments we already have */
uint32_t seg_have;
/* do we still expect more segments? */
unsigned int no_more;
/* total length of all segments together */
unsigned int tot_len;
/* linked list of defrag_queue_entry: one for each fragment */
struct llist_head frag_list;
struct osmo_timer_list timer;
/* Holds state to know which compression mode is used
* when the packet is re-assembled */
uint8_t pcomp;
uint8_t dcomp;
/* Holds the pointers to the compression entity list
* that is used when the re-assembled packet is decompressed */
struct llist_head *proto;
struct llist_head *data;
};
/* See 6.7.1.2 Reassembly */
enum sndcp_rx_state {
SNDCP_RX_S_FIRST,
SNDCP_RX_S_SUBSEQ,
SNDCP_RX_S_DISCARD,
};
struct gprs_sndcp_entity {
struct llist_head list;
/* FIXME: move this RA_ID up to the LLME or even higher */
struct gprs_ra_id ra_id;
/* reference to the LLC Entity below this SNDCP entity */
struct gprs_llc_lle *lle;
/* The NSAPI we shall use on top of LLC */
uint8_t nsapi;
/* NPDU number for the GTP->SNDCP side */
uint16_t tx_npdu_nr;
/* SNDCP eeceiver state */
enum sndcp_rx_state rx_state;
/* The defragmentation queue */
struct defrag_state defrag;
};
extern struct llist_head gprs_sndcp_entities;
int gprs_sndcp_vty_init(void);
/* Set of SNDCP-XID negotiation (See also: TS 144 065,
* Section 6.8 XID parameter negotiation) */
int sndcp_sn_xid_req(struct gprs_llc_lle *lle, uint8_t nsapi);
/* Process SNDCP-XID indication (See also: TS 144 065,
* Section 6.8 XID parameter negotiation) */
int sndcp_sn_xid_ind(struct gprs_llc_xid_field *xid_field_indication,
struct gprs_llc_xid_field *xid_field_response,
const struct gprs_llc_lle *lle);
/* Process SNDCP-XID indication
* (See also: TS 144 065, Section 6.8 XID parameter negotiation) */
int sndcp_sn_xid_conf(struct gprs_llc_xid_field *xid_field_conf,
struct gprs_llc_xid_field *xid_field_request,
struct gprs_llc_lle *lle);
/* Clean up all gprs_sndcp_entities related to llme (OS#4824) */
void gprs_sndcp_sm_deactivate_ind_by_llme(const struct gprs_llc_llme *llme);
/* Called by SNDCP when it has received/re-assembled a N-PDU */
int sndcp_sn_unitdata_ind(struct gprs_sndcp_entity *sne, struct msgb *msg,
uint32_t npdu_len, uint8_t *npdu);
int sndcp_sn_unitdata_req(struct msgb *msg, struct gprs_llc_lle *lle, uint8_t nsapi,
void *mmcontext);
/* Entry point for the SNSM-ACTIVATE.indication */
int sndcp_sm_activate_ind(struct gprs_llc_lle *lle, uint8_t nsapi);
/* Entry point for the SNSM-DEACTIVATE.indication */
int sndcp_sm_deactivate_ind(const struct gprs_llc_lle *lle, uint8_t nsapi);
int sndcp_ll_unitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle,
uint8_t *hdr, uint16_t len);
#endif /* INT_SNDCP_H */
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