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Add LLC defragmentation + SDNCP output via tun device

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this allows us to look at IP messages contained in SNDCP
This commit is contained in:
Harald Welte 2011-05-27 09:37:06 +02:00
parent 13657cf8d2
commit ee7a645ca4
4 changed files with 205 additions and 10 deletions
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27
src/tetra_llc_pdu.h
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@ -1,6 +1,8 @@
#ifndef TETRA_LLC_PDU_H
#define TETRA_LLC_PDU_H
#include <osmocom/core/linuxlist.h>
/* Table 21.1 */
enum tetra_llc_pdu_t {
TLLC_PDUT_BL_ADATA = 0,
@ -64,17 +66,36 @@ enum tllc_pdut_dec {
};
const char *tetra_get_llc_pdut_dec_name(enum tllc_pdut_dec pdut);
/* decoded/parsed PDU with easier encoding */
struct tetra_llc_pdu {
enum tllc_pdut_dec pdu_type;
uint8_t nr;
uint8_t ns;
uint8_t ss;
uint8_t nr; /* N(R) PDU number (receive) */
uint8_t ns; /* N(S) PDU number (sent) */
uint8_t ss; /* S(S) Segment (sent) */
uint32_t _fcs;
uint32_t *fcs;
uint8_t *tl_sdu; /* pointer to bitbuf */
uint8_t tl_sdu_len; /* in bits */
};
/* parse a received LLC PDU and parse it into 'lpp' */
int tetra_llc_pdu_parse(struct tetra_llc_pdu *lpp, uint8_t *buf, int len);
/* TETRA LLC state */
struct tllc_state {
struct llist_head list;
struct {
struct llist_head defrag_list;
} rx;
};
/* entry in the defragmentation queue */
struct tllc_defrag_q_e {
struct llist_head list;
unsigned int ns; /* current de-fragmenting */
unsigned int last_ss; /* last received S(S) */
struct msgb *tl_sdu;
};
#endif /* TETRA_LLC_PDU_H */