| /* |
| * (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * All rights reserved. |
| * |
| * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| * |
| * Released under the terms of GNU General Public License, Version 2 or |
| * (at your option) any later version. |
| */ |
| |
| module OSMUX_Types { |
| |
| import from General_Types all; |
| import from Misc_Helpers all; |
| |
| import from AMR_Types all; |
| |
| external function enc_OSMUX_PDU ( in OSMUX_PDU msg ) return octetstring |
| with { extension "prototype(convert) encode(RAW)" }; |
| external function dec_OSMUX_PDU ( in octetstring msg ) return OSMUX_PDU |
| with { extension "prototype(convert) decode(RAW)" }; |
| |
| type INT1 OsmuxCID (0 .. 255); |
| |
| type enumerated OsmuxFT { |
| OSMUX_FT_LAPD, |
| OSMUX_FT_AMR, |
| OSMUX_FT_DUMMY |
| }; |
| |
| type record Osmux_AMR_header { |
| BIT1 marker, |
| INT2b ft, |
| INT3b ctr, |
| BIT1 amr_f, |
| BIT1 amr_q, |
| INT1 seq, |
| OsmuxCID cid, |
| INT4b amr_ft, |
| INT4b amr_cmr |
| } with { |
| variant "FIELDORDER(msb)" |
| } |
| |
| type record PDU_Osmux_AMR { |
| Osmux_AMR_header header, |
| octetstring data |
| } with { |
| variant "FIELDORDER(msb)" |
| }; |
| |
| type record PDU_Osmux_DUMMY { |
| Osmux_AMR_header header, |
| octetstring data |
| } with { |
| variant "FIELDORDER(msb)" |
| }; |
| |
| type record Osmux_session_par { |
| integer id optional, |
| charstring local_address optional, |
| integer local_port optional, |
| charstring dest_address optional, |
| integer dest_port optional |
| } |
| |
| type record ASP_Osmux_Open_session { |
| Osmux_session_par session_id |
| } |
| |
| type record ASP_Osmux_Open_session_result { |
| Osmux_session_par session_id |
| } |
| |
| type record ASP_Osmux_Close_session { |
| Osmux_session_par session_id |
| } |
| |
| type union OSMUX_PDU { |
| PDU_Osmux_AMR osmux_amr, |
| PDU_Osmux_DUMMY osmux_dummy |
| } with { |
| variant "TAG ( |
| osmux_amr, header.ft = 1; |
| osmux_dummy, header.ft = 2; |
| )" |
| }; |
| |
| template (present) OSMUX_PDU tr_PDU_Osmux_AMR(template (present) BIT1 marker := ?, |
| template (present) INT3b ctr := ?, |
| template (present) BIT1 amr_f := ?, |
| template (present) BIT1 amr_q := ?, |
| template (present) INT1 seq := ?, |
| template (present) OsmuxCID cid := ?, |
| template (present) INT4b amr_ft := ?, |
| template (present) INT4b amr_cmr := ?, |
| template (present) octetstring payload := ?) := { |
| osmux_amr := { |
| header := { |
| marker := marker, |
| ft := 1, |
| ctr := ctr, |
| amr_f := amr_f, |
| amr_q := amr_q, |
| seq := seq, |
| cid := cid, |
| amr_ft := amr_ft, |
| amr_cmr := amr_cmr |
| }, |
| data := payload |
| } |
| } |
| |
| /* Get Nth AMR payload of osmux AMR frame (starting from 0) */ |
| function f_osmux_amr_get_nth_amr_payload(PDU_Osmux_AMR osmux_amr, integer nth) return octetstring |
| { |
| var integer amr_pl_len := f_amrft_payload_len(osmux_amr.header.amr_ft); |
| if (nth > osmux_amr.header.ctr) { |
| Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "nth > ctr"); |
| return ''O; |
| } |
| if (amr_pl_len * (nth+1) > lengthof(osmux_amr.data)) { |
| Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "osmux payload too short"); |
| } |
| var octetstring pl := substr(osmux_amr.data, amr_pl_len * nth, amr_pl_len); |
| return pl; |
| } |
| |
| } with { encode "RAW"} |