#ifndef _INT_SNDCP_H #define _INT_SNDCP_H #include #include #include 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 osmo_routing_area_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 */