| #ifndef _INT_SNDCP_H |
| #define _INT_SNDCP_H |
| |
| #include <stdint.h> |
| #include <osmocom/core/linuxlist.h> |
| |
| /* 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; |
| |
| /* 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, |
| 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); |
| |
| #endif /* INT_SNDCP_H */ |