+++ /dev/null
-/*
-
- $Id$
-
- G N O K I I
-
- A Linux/Unix toolset and driver for Nokia mobile phones.
-
- Released under the terms of the GNU GPL, see file COPYING for more details.
-
- The development of RLP protocol is sponsored by SuSE CR, s.r.o. (Pavel use
- the SIM card from SuSE for testing purposes).
-
- Actual implementation of RLP protocol. Based on GSM 04.22 version 7.1.0,
- downloadable from www.etsi.org (if you register with them)
-
-*/
-
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-
-#include "data/rlp-common.h"
-#include "data/rlp-crc24.h"
-#include "gsm-common.h" /* For GSM error and RLP send function. */
-#include "misc.h" /* For u8, u32 etc. */
-
-#ifdef WIN32
-#define INLINE __inline
-#else
-#define INLINE inline
-#endif
-
-/* Our state machine which handles all of nine possible states of RLP
- machine. */
-void MAIN_STATE_MACHINE(RLP_F96Frame *frame, RLP_F96Header *header);
-
-/* This is the type we are just handling. */
-RLP_FrameTypes CurrentFrameType;
-
-/* Current state of RLP state machine. */
-RLP_State CurrentState=RLP_S0; /* We start at ADM and Detached */
-
-/* Next state of RLP state machine. */
-RLP_State NextState;
-
-/* Pointer to Send function that sends frame to phone. */
-bool (*RLPSendFunction)(RLP_F96Frame *frame, bool out_dtx);
-
-/* Pointer to Passup function which returns data/inds */
-int (*RLP_Passup)(RLP_UserInds ind, u8 *buffer, int length);
-
-
-/* State variables - see GSM 04.22, Annex A, section A.1.2 */
-
-RLP_StateVariable UA_State;
-RLP_StateVariable UI_State;
-RLP_StateVariable Ackn_State;
-RLP_StateVariable Poll_State;
-RLP_StateVariable Poll_xchg;
-RLP_StateVariable SABM_State;
-RLP_StateVariable DISC_State;
-RLP_StateVariable DM_State; /* FIXME - not handled */
-RLP_StateVariable XI_R_State;
-RLP_StateVariable XID_C_State;
-RLP_StateVariable XID_R_State;
-RLP_StateVariable TEST_R_State;
-
-u8 VR=0;
-u8 VA=0;
-u8 VS=0;
-u8 VD=0;
-u8 DISC_Count;
-
-u8 DTX_VR;
-RLP_FrameTypes DTX_SF;
-
-#define RLP_M 62
-
-RLP_Data R[RLP_M];
-RLP_Data S[RLP_M];
-
-RLP_StateVariable SABM_State;
-int SABM_Count;
-
-RLP_UserRequestStore UserRequests;
-
-u8 Poll_Count=0;
-
-/* For now timing is done based on a frame reception rate of 20ms */
-/* Serge has measured it as 18.4ms */
-#define RLP_T_Scaling 2
-
-/* Timers - a value of -1 means not set */
-/* To set, timer is loaded with RLP_Timeout1_Limit/RLP_T_Scaling. */
-/* Each received frame (including NULLS / errors) any >0 timer is decrease */
-
-int T;
-int T_RCVS[RLP_M];
-
-bool UA_FBit=true;
-bool Ackn_FBit=false;
-bool DM_FBit=false; /* FIXME - not handled */
-bool RRReady=false;
-bool LRReady=true; /* FIXME - not handled (as if we couldn't keep up with 9600bps :-) */
-bool DISC_PBit=false;
-
-u8 LastStatus=0xff; /* Last Status byte */
-
-
-/* RLP Parameters. FIXME: Reset these - e.g. when entering state 0 */
-
-u8 RLP_SEND_WS = RLP_M-1;
-u8 RLP_RCV_WS = RLP_M-1;
-u8 RLP_Timeout1_Limit = 55;
-u8 RLP_N2 = 15; /* Maximum number of retransmisions. GSM spec says 6 here, but
- Nokia will XID this. */
-u8 RLP_T2=0;
-u8 RLP_VersionNumber=0;
-
-
-
-/****** Externally called functions ********/
-/*******************************************/
-
-
-/* Function to initialise RLP code. Main purpose for now is
- to set the address of the RLP send function in the API code. */
-
-void RLP_Initialise(bool (*rlp_send_function)(RLP_F96Frame *frame, bool out_dtx), int (*rlp_passup)(RLP_UserInds ind, u8 *buffer, int length))
-{
- int i;
-
- RLPSendFunction = rlp_send_function;
- RLP_Passup=rlp_passup;
- UserRequests.Conn_Req=false;
- UserRequests.Attach_Req=false;
- UserRequests.Conn_Req_Neg=false;
- UserRequests.Reset_Resp=false;
- UserRequests.Disc_Req=false;
- CurrentState=RLP_S0;
- T=-1;
- for (i=0;i<RLP_M;i++) T_RCVS[i]=-1;
-
- UA_FBit=true;
- Ackn_FBit=false;
- DISC_PBit=false;
- LastStatus=0xff;
- Poll_Count=0;
- VR=0;
- VA=0;
- VS=0;
- VD=0;
-
- RLP_SEND_WS = RLP_M-1;
- RLP_RCV_WS = RLP_M-1;
- RLP_Timeout1_Limit = 55;
- RLP_N2 = 15;
- RLP_T2=0;
- RLP_VersionNumber=0;
-
-}
-
-/* Set a user event */
-/* Called by user program for now */
-
-void RLP_SetUserRequest(RLP_UserRequests type, bool value) {
-
- switch (type) {
- case Conn_Req:
- UserRequests.Conn_Req=value;
- break;
- case Attach_Req:
- UserRequests.Attach_Req=value;
- break;
- case Conn_Req_Neg:
- UserRequests.Conn_Req_Neg=value;
- break;
- case Reset_Resp:
- UserRequests.Reset_Resp=value;
- break;
- case Disc_Req:
- UserRequests.Disc_Req=value;
- break;
- default:
- break;
- }
-}
-
-
-
-
-/***** Internal functions **********/
-/***********************************/
-
-
-/* Check whether a user event is set */
-
-bool RLP_GetUserRequest(RLP_UserRequests type) {
-
- bool result=false, *x;
-
- switch (type) {
- case Conn_Req:
- x=&UserRequests.Conn_Req;
- break;
- case Attach_Req:
- x=&UserRequests.Attach_Req;
- break;
- case Conn_Req_Neg:
- x=&UserRequests.Conn_Req_Neg;
- break;
- case Reset_Resp:
- x=&UserRequests.Reset_Resp;
- break;
- case Disc_Req:
- x=&UserRequests.Disc_Req;
- break;
- default:
- x=&result;
- break;
- }
-
- result=*x;
-
- if ( *x == true )
- *x=false;
-
- return result;
-}
-
-void RLP_SetTimer(int *timer)
-{
- *timer=(int)(RLP_Timeout1_Limit/RLP_T_Scaling);
-}
-
-
-/* Previous sequence number. */
-static INLINE u8 Decr(u8 x)
-{
- if (x==0)
- return (RLP_M-1);
- else
- return (x-1);
-}
-
-/* Next sequence number. */
-static INLINE u8 Incr(u8 x)
-{
- if (x==RLP_M-1)
- return 0;
- else
- return (x+1);
-}
-
-/* Difference between sequence numbers. */
-
-/* FIXME: Not used now, so I have commented it out. PJ
- * static INLINE u8 Diff(u8 x, u8 y)
- * {
- * int result = x-y;
- * return (result >= 0) ? result : result + RLP_M;
- * }
-*/
-
-/* Check value is within range */
-static bool InWindow(u8 val, u8 lower, u8 upper)
-{
- /* allow for one level of wrapping round */
- if (lower>=RLP_M) lower-=RLP_M;
- if (upper>=RLP_M) upper-=RLP_M;
- if (val>=RLP_M) val-=RLP_M;
-
- /* .......L*****U....... */
- if (lower <= upper)
- return (val >= lower) && (val <= upper);
-
- /* ******U.........L***** */
- return (val <= upper) || (val >= lower);
-}
-
-void RLP_Init_link_vars(void)
-{
- int i;
-
- Ackn_State=_idle;
- Poll_State=_idle;
- Poll_Count=0;
- Poll_xchg=_idle;
- SABM_State=_idle;
- DISC_State=_idle;
- RRReady=true; /* This seems a bit strange but it's what the spec says... */
- VA=0;
- VR=0;
- VS=0;
- VD=0;
- LastStatus=0xff;
-
- for(i=0;i<RLP_M;i++) {
- R[i].State=_idle;
- S[i].State=_idle;
- }
-
-}
-
-
-void RLP_AddRingBufferDataToSlots(void)
-{
- u8 buffer[24];
- int size;
-
- while ((S[VD].State==_idle)
- && ((size=RLP_Passup(GetData,buffer,24))!=0)) {
- memset(S[VD].Data,0xff,25); /* FIXME - this isn't necessary - but makes debugging easier! */
- if (size>23) {
- S[VD].Data[0]=0x1e;
- size=24;
- }
- else S[VD].Data[0]=size;
-
- memcpy(&S[VD].Data[1],buffer,size);
-
- if (size!=24) S[VD].Data[size+1]=0x1f;
-
- S[VD].State=_send;
- VD=Incr(VD);
- }
-}
-
-
-/* FIXME: Remove this after finishing. */
-
-void X(RLP_F96Frame *frame) {
-
- int i;
-
- for (i=0; i<30; i++)
- printf("byte[%2d]: %02x\n", i, *( (u8 *)frame+i));
-
-}
-
-
-
-void ResetAllT_RCVS(void)
-{
-
- int i;
- for (i=0;i<RLP_M;i++) T_RCVS[i]=-1;
-}
-
-
-
-/* This function is used for sending RLP frames to the phone. */
-
-void RLP_SendF96Frame(RLP_FrameTypes FrameType,
- bool OutCR, bool OutPF,
- u8 OutNR, u8 OutNS,
- u8 *OutData, u8 OutDTX)
-{
-
- RLP_F96Frame frame;
- int i;
-
- frame.Header[0]=0;
- frame.Header[1]=0;
-
-#define SetCRBit frame.Header[0]|=0x01;
-#define SetPFBit frame.Header[1]|=0x02;
-
-#define ClearCRBit frame.Header[0]&=(~0x01);
-#define ClearPFBit frame.Header[1]&=(~0x02);
-
- /* If Command/Response bit is set, set it in the header. */
- if (OutCR)
- SetCRBit;
-
-
- /* If Poll/Final bit is set, set it in the header. */
- if (OutPF)
- SetPFBit;
-
-
- /* If OutData is not specified (ie. is NULL) we want to clear frame.Data
- array for the user. */
- if (!OutData) {
-
- frame.Data[0]=0x00; // 0x1f
-
- for (i=1; i<25; i++)
- frame.Data[i]=0;
- }
- else {
- for (i=0; i<25; i++)
- frame.Data[i]=OutData[i];
- }
-
-#define PackM(x) frame.Header[1]|=((x)<<2);
-#define PackS(x) frame.Header[0]|=((x)<<1);
-#define PackNR frame.Header[1]|=(OutNR<<2);
-#define PackNS frame.Header[0]|=(OutNS<<3);frame.Header[1]|=(OutNS>>5);
-
- switch (FrameType) {
-
- /* Unnumbered frames. Be careful - some commands are used as commands
- only, so we have to set C/R bit later. We should not allow user for
- example to send SABM as response because in the spec is: The SABM
- encoding is used as command only. */
-
- case RLPFT_U_SABM:
-
- frame.Header[0]|=0xf8; /* See page 11 of the GSM 04.22 spec - 0 X X 1 1 1 1 1 */
- frame.Header[1]|=0x01; /* 1 P/F M1 M2 M3 M4 M5 X */
-
- SetCRBit; /* The SABM encoding is used as a command only. */
- SetPFBit; /* It is always used with the P-bit set to "1". */
-
- PackM(RLPU_SABM);
-
- break;
-
- case RLPFT_U_UA:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- ClearCRBit; /* The UA encoding is used as a response only. */
-
- PackM(RLPU_UA);
-
- break;
-
- case RLPFT_U_DISC:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- SetCRBit; /* The DISC encoding is used as a command only. */
-
- PackM(RLPU_DISC);
-
- break;
-
- case RLPFT_U_DM:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- ClearCRBit; /* The DM encoding is used as a response only. */
-
- PackM(RLPU_DM);
-
- break;
-
- case RLPFT_U_NULL:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- PackM(RLPU_NULL);
-
- break;
-
- case RLPFT_U_UI:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- PackM(RLPU_UI);
-
- break;
-
- case RLPFT_U_XID:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- SetPFBit; /* XID frames are always used with the P/F-bit set to "1". */
-
- PackM(RLPU_XID);
-
- break;
-
- case RLPFT_U_TEST:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- PackM(RLPU_TEST);
-
- break;
-
- case RLPFT_U_REMAP:
-
- frame.Header[0]|=0xf8;
- frame.Header[1]|=0x01;
-
- ClearPFBit; /* REMAP frames are always used with P/F-bit set to "0". */
-
- PackM(RLPU_REMAP);
-
- break;
-
- case RLPFT_S_RR:
-
- frame.Header[0]|=0xf0; /* See page 11 of the GSM 04.22 spec - 0 X X 1 1 1 1 1 */
- frame.Header[1]|=0x01; /* 1 P/F ...N(R)... */
-
- PackNR;
-
- PackS(RLPS_RR);
-
- break;
-
- case RLPFT_S_REJ:
-
- frame.Header[0]|=0xf0;
- frame.Header[1]|=0x01;
-
- PackNR;
-
- PackS(RLPS_REJ);
-
- break;
-
- case RLPFT_S_RNR:
-
- frame.Header[0]|=0xf0;
- frame.Header[1]|=0x01;
-
- PackNR;
-
- PackS(RLPS_RNR);
-
- break;
-
- case RLPFT_S_SREJ:
-
- frame.Header[0]|=0xf0;
- frame.Header[1]|=0x01;
-
- PackNR;
-
- PackS(RLPS_SREJ);
-
- break;
-
- case RLPFT_SI_RR:
-
- PackNR;
- PackNS;
-
- PackS(RLPS_RR);
-
- break;
-
- case RLPFT_SI_REJ:
- PackNR;
- PackNS;
-
- PackS(RLPS_REJ);
-
- break;
-
- case RLPFT_SI_RNR:
-
- PackNR;
- PackNS;
-
- PackS(RLPS_RNR);
-
- break;
-
- case RLPFT_SI_SREJ:
- PackNR;
- PackNS;
-
- PackS(RLPS_SREJ);
-
- break;
-
- default:
- break;
- }
-
-
- /* Store FCS in the frame. */
- RLP_CalculateCRC24Checksum((u8 *)&frame, 27, frame.FCS);
-
- // X(&frame);
-
- if (RLPSendFunction)
- RLPSendFunction(&frame, OutDTX);
-
-}
-
-/* Check_input_PDU in Serge's code. */
-
-void RLP_DisplayF96Frame(RLP_F96Frame *frame)
-{
- int count;
- RLP_F96Header header;
-
- if (T>=0) T--;
- for (count=0;count<RLP_M;count++) if (T_RCVS[count]>=0) T_RCVS[count]--;
-
- CurrentFrameType=RLPFT_BAD;
-
- if (!frame) {
- /* no frame provided, drop through to state machine anyway */
- } else if (RLP_CheckCRC24FCS((u8 *)frame, 30) == true) {
-
- /* Here we have correct RLP frame so we can parse the field of the header
- to out structure. */
-
- RLP_DecodeF96Header(frame, &header);
-
- switch (header.Type) {
-
- case RLPFT_U: /* Unnumbered frames. */
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Unnumbered Frame [$%02x%02x] M=%02x ", frame->Header[0],
- frame->Header[1],
- header.M);
-#endif
-
- switch (header.M) {
-
- case RLPU_SABM :
- if (header.CR == 0 || header.PF == 0) break;
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Set Asynchronous Balanced Mode (SABM) ");
-#endif
-
- CurrentFrameType=RLPFT_U_SABM;
-
- break;
-
- case RLPU_UA:
- if (header.CR == 1) break;
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Unnumbered Acknowledge (UA) ");
-#endif
-
- CurrentFrameType=RLPFT_U_UA;
-
- break;
-
- case RLPU_DISC:
- if (header.CR == 0) break;
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Disconnect (DISC) ");
-#endif
-
- CurrentFrameType=RLPFT_U_DISC;
-
- break;
-
- case RLPU_DM:
- if (header.CR == 1) break;
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Disconnected Mode (DM) ");
-#endif
- CurrentFrameType=RLPFT_U_DM;
-
- break;
-
- case RLPU_UI:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Unnumbered Information (UI) ");
-#endif
-
- CurrentFrameType=RLPFT_U_UI;
-
- break;
-
- case RLPU_XID:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Exchange Information (XID) \n");
- RLP_DisplayXID(frame->Data);
-#endif
-
- CurrentFrameType=RLPFT_U_XID;
-
- break;
-
- case RLPU_TEST:
-
-#ifdef DEBUG
- fprintf(stdout, "Test (TEST) ");
-#endif
-
- CurrentFrameType=RLPFT_U_TEST;
-
- break;
-
- case RLPU_NULL:
-
-#ifdef DEBUG
- fprintf(stdout, "Null information (NULL) ");
-#endif
-
- CurrentFrameType=RLPFT_U_NULL;
-
- break;
-
- case RLPU_REMAP:
-
-#ifdef DEBUG
- fprintf(stdout, "Remap (REMAP) ");
-#endif
-
- CurrentFrameType=RLPFT_U_REMAP;
-
- break;
-
- default :
-
-#ifdef RLP_DEBUG
- fprintf(stdout, _("Unknown!!! "));
-#endif
-
- CurrentFrameType=RLPFT_BAD;
-
- break;
-
- }
- break;
-
- case RLPFT_S: /* Supervisory frames. */
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Supervisory Frame [$%02x%02x] S=0x%x N(R)=%d ",
- frame->Header[0],
- frame->Header[1],
- header.S,
- header.Nr);
-#endif
-
- switch (header.S) {
-
- case RLPS_RR:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "RR");
-#endif
-
- CurrentFrameType=RLPFT_S_RR;
-
- break;
-
- case RLPS_REJ:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "REJ");
-#endif
-
- CurrentFrameType=RLPFT_S_REJ;
-
- break;
-
- case RLPS_RNR:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "RNR");
-#endif
-
- CurrentFrameType=RLPFT_S_RNR;
-
- break;
-
- case RLPS_SREJ:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "SREJ");
-#endif
-
- CurrentFrameType=RLPFT_S_SREJ;
-
- break;
-
- default:
-
-#ifdef DEBUG
- fprintf(stdout, _("BAD"));
-#endif
-
- CurrentFrameType=RLPFT_BAD;
-
- break;
-
- }
-
- break;
-
- default:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Info+Supervisory Frame [$%02x%02x] S=0x%x N(S)=%d N(R)=%d ",
- frame->Header[0],
- frame->Header[1],
- header.S,
- header.Ns,
- header.Nr);
-#endif
-
- switch (header.S) {
-
- case RLPS_RR:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "RR");
-#endif
-
- CurrentFrameType=RLPFT_SI_RR;
-
- break;
-
- case RLPS_REJ:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "REJ");
-#endif
-
- CurrentFrameType=RLPFT_SI_REJ;
-
- break;
-
- case RLPS_RNR:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "RNR");
-#endif
-
- CurrentFrameType=RLPFT_SI_RNR;
-
- break;
-
- case RLPS_SREJ:
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "SREJ");
-#endif
-
- CurrentFrameType=RLPFT_SI_SREJ;
-
- break;
-
- default:
-
-#ifdef DEBUG
- fprintf(stdout, "BAD");
-#endif
-
- CurrentFrameType=RLPFT_BAD;
-
- break;
- }
-
- break;
- }
-
-#ifdef RLP_DEBUG
-
- /* Command/Response and Poll/Final bits. */
-
- fprintf(stdout, " C/R=%d P/F=%d", header.CR, header.PF);
-#endif
-
-#ifdef DEBUG
-
- /* Information. */
-
- if (CurrentFrameType!=RLPFT_U_NULL) {
-
- fprintf(stdout, "\n");
-
- for (count = 0; count < 25; count ++) {
-
- if (isprint(frame->Data[count]))
- fprintf(stdout, "[%02x%c]", frame->Data[count], frame->Data[count]);
- else
- fprintf(stdout, "[%02x ]", frame->Data[count]);
-
- if (count == 15)
- fprintf(stdout, "\n");
- }
- }
-
-#endif
-#ifdef RLP_DEBUG
- /* FCS. */
-
- fprintf (stdout, " FCS: %02x %02x %02x\n\n", frame->FCS[0],
- frame->FCS[1],
- frame->FCS[2]);
-
- fflush(stdout);
-
-#endif
-
- }
- else {
-
- /* RLP Checksum failed - don't we need some statistics about these
- failures? Nothing is printed, because in the first stage of connection
- there are too many bad RLP frames... */
-
-#ifdef DEBUG
- fprintf(stdout, _("Frame FCS is bad. Ignoring...\n"));
-#endif
-
- }
-
- MAIN_STATE_MACHINE(frame, &header);
-
- /*
- Y:= outblock();
- */
-
- return;
-}
-
-/* FIXME: real TEST_Handling - we do not handle TEST yet. */
-
-void TEST_Handling() {
-}
-
-
-
-/* FIXME: better XID_handling - but this will answer a XID command. */
-
-bool XID_Handling (RLP_F96Frame *frame, RLP_F96Header *header) {
-
- u8 count;
- u8 type;
- u8 length;
-
- if (CurrentFrameType == RLPFT_U_XID) {
-
- count=0;
-
- while (frame->Data[count] !=0) {
-
- type=frame->Data[count] >> 4;
- length=frame->Data[count] & 0x0f;
- count++;
-
- switch (type) {
-
- case 0x01: /* RLP Version Number */
- RLP_VersionNumber=frame->Data[count];
- count+=length;
- break;
- case 0x02: /* Interworking Function (IWF) to Mobile Station (MS) window size */
- if (frame->Data[count]>=1 && frame->Data[count]<RLP_M)
- RLP_RCV_WS=frame->Data[count];
- count+=length;
- break;
- case 0x03: /* MS to IWF window size */
- if (frame->Data[count]>=1 && frame->Data[count]<RLP_M)
- RLP_SEND_WS=frame->Data[count];
- count+=length;
- break;
- case 0x04: /* Acknowledgement Timer (T1). */
- RLP_Timeout1_Limit=frame->Data[count];
- count+=length;
- break;
- case 0x05: /* Retransmission attempts (N2). */
- RLP_N2=frame->Data[count];
- count+=length;
- break;
- case 0x06: /* Reply delay (T2). */
- RLP_T2=frame->Data[count];
- count+=length;
- break;
- case 0x07: /* Compression - not yet! */
- break;
- default:
- count+=length;
- break;
- }
- }
-
- /* Now reassemble a reply */
-
- count=0;
- memset(frame->Data,0x00,25); /* Makes debugging easier */
-
- /* Version Number - force to 0 for now */
- RLP_VersionNumber=0;
- frame->Data[count++]=0x11;
- frame->Data[count++]=RLP_VersionNumber;
-
- /* Window sizes */
- frame->Data[count++]=0x21;
- frame->Data[count++]=RLP_RCV_WS;
- frame->Data[count++]=0x31;
- frame->Data[count++]=RLP_SEND_WS;
-
- /* Acknowledgement Timer (T1). */
- frame->Data[count++]=0x41;
- frame->Data[count++]=RLP_Timeout1_Limit;
-
- /* Retransmission attempts (N2). */
- frame->Data[count++]=0x51;
- frame->Data[count++]=RLP_N2;
-
- /* Reply delay (T2). */
- frame->Data[count++]=0x61;
- frame->Data[count++]=RLP_T2;
-
- XID_R_State = _send;
-
- return true;
- }
-
- return false;
-}
-
-
-bool Send_TXU(RLP_F96Frame *frame, RLP_F96Header *header) {
-
-#ifdef DEBUG
- // fprintf(stdout, _("Send_TXU()\n"));
- // fprintf(stdout, _("XID_R_State=%d\n"), XID_R_State);
-#endif
-
- /*
-
- if (RLP_UserEvent(TEST_R_State)) {
- RLP_SendF96Frame(RLPFT_U_TEST, false, TEST_R_FBit, 0, 0, TEST_R_Data, false);
- return true;
- }
- else
-
- */
-
- if (XID_R_State == _send && frame) {
- RLP_SendF96Frame(RLPFT_U_XID, false, true, 0, 0, frame->Data, false);
- XID_R_State = _idle;
- return true;
- }
-
- /*
-
- else if ((XID_C_State == _send ) && (Poll_xchg == _idle)) {
- RLP_SendF96Frame(RLPFT_U_XID, true, true, 0, 0, XID_C_Data, false);
- XID_C_State = _wait;
- T_XID = 1;
- Poll_xchg = _wait;
- return true;
- } else if (RLP_UserEvent(UI_State)) {
- RLP_SendF96Frame(RLPFT_U_UI, true, false, 0, 0, NULL, false);
- return true;
- }
-
- */
-
- return false;
-}
-
-
-/* Deliver data */
-
-void RLP_DeliverAllInSeqIF()
-{
- int i,j;
-
- do {
-
- if ((R[VR].Data[0] & 0xE0)!=LastStatus) {
- LastStatus=(R[VR].Data[0] & 0xE0);
- RLP_Passup(StatusChange,&LastStatus,0);
- }
-
- j=0;
- i=R[VR].Data[0] & 0x1f;
- if (i==0x1e) j=24;
- if (i<0x18) j=i;
-
- /* FIXME - should check for more data in the frame */
-
- RLP_Passup(Data,R[VR].Data+1,j);
-
- R[VR].State=_idle;
- VR=Incr(VR);
-
- } while (R[VR].State==_rcvd);
-}
-
-
-/* Mark any missing information frames between VR and Ns*/
-void RLP_MarkMissingIF(u8 Ns)
-{
- u8 i;
- for (i=VR; i!=Ns; i=Incr(i)) {
- if (R[i].State==_idle) R[i].State=_srej; /* bug in spec, fig A.23 */
- }
-}
-
-
-/* Information frame handler */
-
-bool RLP_I_Handler(RLP_F96Frame *frame, RLP_F96Header *header)
-{
-
- if ((header->CR) && (header->PF))
- return true;
-
- /* If the window size is 61, a received frame must have a sequence
- number between VR and VR+60 */
-
- if (!InWindow(header->Ns,VR,VR+RLP_RCV_WS-1))
- return true;
-
- if (header->Ns==VR) {
- /* This is not in the spec but I think it is necessary */
- if (R[header->Ns].State==_wait) T_RCVS[header->Ns]=-1;
- R[VR].State=_rcvd;
- memcpy(R[VR].Data,frame->Data,25);
- RLP_DeliverAllInSeqIF();
- Ackn_State=_send;
- }
- else { /* Out of sequence, cause a SREJ */
- if (R[header->Ns].State==_wait) T_RCVS[header->Ns]=-1;
- R[header->Ns].State=_rcvd;
- memcpy(R[header->Ns].Data,frame->Data,25);
- RLP_MarkMissingIF(header->Ns);
- }
-
- return false;
-}
-
-
-/* Mark acknowledged send frames */
-
-void RLP_AdvanceVA(u8 Nr)
-{
- while (VA!=Nr) {
- S[VA].State=_idle;
- VA=Incr(VA);
- }
-}
-
-
-/* Decrease VS back down to Nr since these have not been acknowledged */
-
-void RLP_DecreaseVS(u8 Nr)
-{
- while (VS!=Nr) {
- VS=Decr(VS);
- S[VS].State=_send;
- }
-}
-
-/* Supervisory frame handling */
-
-void RLP_S_Handler(RLP_F96Frame *frame, RLP_F96Header *header)
-{
- u8 i;
-
- if ((header->CR) && (header->PF)) {
- /* Special exchange (ie. error) - counter? */
-#ifdef RLP_DEBUG
- fprintf(stdout, "Got Poll command\n");
-#endif
- Ackn_State=_send;
- Ackn_FBit=true;
- for (i=0; i<RLP_M; i++) R[i].State=_idle;
- ResetAllT_RCVS();
- }
- if (Poll_State!=_idle) {
- if (header->PF==0) return;
- if ((CurrentFrameType==RLPFT_S_SREJ) || (CurrentFrameType==RLPFT_S_REJ) ||
- (CurrentFrameType==RLPFT_SI_SREJ) || (CurrentFrameType==RLPFT_SI_REJ)) return;
- RLP_DecreaseVS(header->Nr);
- Poll_State=_idle;
- Poll_xchg=_idle;
- }
- switch (CurrentFrameType){
-
- case RLPFT_S_RR:
- case RLPFT_SI_RR:
- RLP_AdvanceVA(header->Nr);
- RRReady=true;
- break;
- case RLPFT_S_RNR:
- case RLPFT_SI_RNR:
- RLP_AdvanceVA(header->Nr);
- RRReady=false;
- break;
- case RLPFT_S_REJ:
- case RLPFT_SI_REJ:
- RLP_AdvanceVA(header->Nr);
- RRReady=true;
- RLP_DecreaseVS(header->Nr);
- break;
- case RLPFT_S_SREJ:
- case RLPFT_SI_SREJ:
- S[header->Nr].State=_send;
- T=-1;
- return;
- default:
- break;
- }
-
- if (VA==VS) T=-1;
-
-}
-
-
-/* Find the first SREJ frame */
-
-bool RLP_SREJSlot(u8 *x)
-{
- u8 i;
-
- for (i=Incr(VR); i!=VR; i=Incr(i)) if (R[i].State==_srej) {
- *x=i;
- return true;
- }
-
- return false;
-}
-
-
-
-/* Check if any SREJ frames need sending, if not send the next in line */
-
-bool RLP_PrepareDataToTransmit(u8 *p)
-{
- u8 i;
-
- for (i=VA; i!=VS; i=Incr(i))
- if (S[i].State==_send) {
- *p=i;
- S[i].State=_wait;
- return true;
- }
- if (S[VS].State!=_send) return false;
- if (!InWindow(VS,VA,VA+RLP_SEND_WS-1))
- return false;
- *p=VS;
- S[VS].State=_wait;
- VS=Incr(VS);
- return true;
-}
-
-
-
-/* Send a SREJ command */
-
-void RLP_SendSREJ(u8 x)
-{
- u8 k;
-
- if ((Poll_xchg==_idle) && (Poll_State==_send)) {
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending SREJ with poll\n");
-#endif
-
- RLP_SendF96Frame(RLPFT_S_SREJ, true, true, x , 0 , NULL, false);
- R[x].State=_wait;
- RLP_SetTimer(&T_RCVS[x]);
- Poll_Count++;
- Poll_State=_wait;
- Poll_xchg=_wait;
- RLP_SetTimer(&T);
- }
- else if (RRReady && RLP_PrepareDataToTransmit(&k)) {
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending SREJ for %d along with frame %d\n",x,k);
-#endif
- RLP_SendF96Frame(RLPFT_SI_SREJ, true, false, x , k , S[k].Data, false);
- R[x].State=_wait;
- RLP_SetTimer(&T_RCVS[x]);
- RLP_SetTimer(&T);
- }
- else {
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending SREJ for %d\n",x);
-#endif
- RLP_SendF96Frame(RLPFT_S_SREJ, true, false, x , 0 , NULL, false);
- R[x].State=_wait;
- RLP_SetTimer(&T_RCVS[x]);
- }
-}
-
-
-/* Send a command */
-
-void RLP_Send_XX_Cmd(RLP_FrameTypes type)
-{
- u8 k;
-
- if ((Poll_xchg!=_wait) && (Poll_State==_send)) {
- RLP_SendF96Frame(type, true, true, VR , 0 , NULL, false);
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending Comd %x with Poll\n",type);
-#endif
- Ackn_State=_idle;
- Poll_Count++;
- Poll_State=_wait;
- Poll_xchg=_wait;
- RLP_SetTimer(&T);
- }
- else if (RRReady && RLP_PrepareDataToTransmit(&k)) {
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending Comd %x with frame %d\n",type,k);
-#endif
- RLP_SendF96Frame(type+4, true, false, VR , k , S[k].Data, false);
- Ackn_State=_idle;
- RLP_SetTimer(&T);
- }
- else {
-#ifdef RLP_DEBUG
- if (type!=9)
- fprintf(stdout, "Sending Comd %x\n",type);
-#endif
- RLP_SendF96Frame(type, true, false, VR , 0 , NULL, false);
- Ackn_State=_idle;
- DTX_SF=type;
- DTX_VR=VR; /* As v7.1.0 spec */
- }
-}
-
-
-/* Send a Response */
-
-void RLP_Send_XX_Resp(RLP_FrameTypes type)
-{
- u8 k;
-
- if (RRReady && RLP_PrepareDataToTransmit(&k)) {
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending Resp %x with frame %d\n",type+4,k);
-#endif
- RLP_SendF96Frame(type+4, false, true, VR , k , S[k].Data, false);
- Ackn_State=_idle;
- Ackn_FBit=false;
- RLP_SetTimer(&T);
- }
- else {
-#ifdef RLP_DEBUG
- fprintf(stdout, "Sending Resp %x\n",type);
-#endif
- RLP_SendF96Frame(type, false, true, VR , 0 , NULL, false);
- Ackn_State=_idle;
- Ackn_FBit=false;
- }
-}
-
-
-/* Decide which frame to use and send it - currently only used in state 4 */
-
-void RLP_SendData()
-{
- u8 x;
-
- if (UA_State==_send) {
- RLP_SendF96Frame(RLPFT_U_UA, false, UA_FBit, 0 , 0 , NULL, false);
- UA_State=_idle;
- }
- else if (Ackn_FBit==true) {
-#ifdef RLP_DEBUG
- printf("About to send Poll resp\n");
-#endif
- if (LRReady) RLP_Send_XX_Resp(RLPFT_S_RR);
- else RLP_Send_XX_Resp(RLPFT_S_RNR);
- }
- else if (RLP_SREJSlot(&x)) RLP_SendSREJ(x);
- else if (LRReady) RLP_Send_XX_Cmd(RLPFT_S_RR);
- else RLP_Send_XX_Cmd(RLPFT_S_RNR);
-}
-
-void MAIN_STATE_MACHINE(RLP_F96Frame *frame, RLP_F96Header *header) {
- int i;
-
- switch (CurrentState) {
-
- /***** RLP State 0. *****/
-
- /* ADM and Detached.
-
- This is the initial state after power on.
-
- As long as the RLP entity is "Detached", DISC(P) and/or SABM at the
- lower interface is acted upon by sending DM(P) or DM(1). Any other
- stimulus at the lower interface is ignored.
-
- This state can be exited only with Attach_Req. */
-
- case RLP_S0:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 0.\n"));
-#endif
-
- switch (CurrentFrameType) {
-
- case RLPFT_U_DISC:
- RLP_SendF96Frame(RLPFT_U_DM, false, header->PF, 0, 0, NULL, false);
- break;
-
- case RLPFT_U_SABM:
- RLP_SendF96Frame(RLPFT_U_DM, false, true, 0, 0, NULL, false);
- break;
-
- default:
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- if (RLP_GetUserRequest(Attach_Req)) {
- NextState=RLP_S1;
- UA_State=_idle;
- }
- break;
- }
-
- break;
-
- /***** RLP State 1. *****/
-
- /* ADM and Attached.
-
- The RLP entity is ready to established a connection, either by
- initiating the connection itself (Conn_Req) or by responding to an
- incoming connection request (SABM).
-
- Upon receiving a DISC PDU, the handling of the UA response is
- initiated. */
-
- case RLP_S1:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 1.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch(CurrentFrameType) {
-
- case RLPFT_U_TEST:
- TEST_Handling();
- break;
-
- case RLPFT_U_SABM:
- RLP_Passup(Conn_Ind,NULL,0);
- NextState=RLP_S3;
- break;
-
- case RLPFT_U_DISC:
- UA_State=_send;
- UA_FBit=header->PF;
- break;
-
- case RLPFT_BAD: /* If we get a bad frame we can still respond with SABM */
- default:
- if (RLP_GetUserRequest(Conn_Req)) {
- SABM_State=_send;
- SABM_Count=0;
- NextState=RLP_S2;
- }
- break;
- }
-
- }
- if (!Send_TXU(frame, header)) {
-
- if (UA_State == _send) {
- RLP_SendF96Frame(RLPFT_U_UA, false, UA_FBit, 0, 0, NULL, false);
- UA_State=_idle;
- }
- else
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- }
- break;
-
- /***** RLP State 2. *****/
-
- case RLP_S2:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 2.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch(CurrentFrameType) {
-
- case RLPFT_U_TEST:
- TEST_Handling();
- break;
-
- case RLPFT_U_SABM:
- /*
- T=0;
- Conn_Conf=true;
- UA_State=_send;
- UA_FBit=true;
- Init_Link_Vars;
- NextState=4;
- */
- break;
-
- case RLPFT_U_DISC:
- /*
- T=0;
- DISC_Ind;
- UA_State=_send;
- UA_FBit=header->PF;
- NextState=RLP_S1;
- */
- break;
-
- case RLPFT_U_UA:
-#ifdef DEBUG
- fprintf(stdout, _("UA received in RLP state 2.\n"));
-#endif
-
- if (SABM_State == _wait && header->PF) {
- T=-1;
- // Conn_Conf=true;
- // Init_Link_Vars;
- NextState=RLP_S4;
- }
- break;
-
- case RLPFT_U_DM:
- if (SABM_State == _wait && header->PF) {
- Poll_xchg=_idle;
- // Conn_Conf_Neg=true;
- NextState=RLP_S1;
- }
- break;
-
- default:
- if (T == RLP_Timeout1_Limit) {
- Poll_xchg=_idle;
- if (SABM_Count>RLP_N2)
- NextState=RLP_S8;
- SABM_State=_send;
- }
- break;
- }
- }
-
- if (!Send_TXU(frame, header)) {
-
- if (SABM_State == _send && Poll_xchg == _idle) {
- RLP_SendF96Frame(RLPFT_U_SABM, true, true, 0, 0, NULL, false);
- SABM_State=_wait;
- SABM_Count++;
- Poll_xchg=_wait;
- T=1;
- } else
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- }
-
- if (RLP_GetUserRequest(Disc_Req)) {
- T=-1;
- DISC_State=_send;
- DISC_Count=0;
- DISC_PBit=(Poll_xchg==_idle);
- NextState=5;
- }
-
- break;
-
- /***** RLP State 3. *****/
-
- case RLP_S3:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 3.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch(CurrentFrameType) {
-
- case RLPFT_U_TEST:
- TEST_Handling();
- break;
-
- case RLPFT_U_DISC:
- RLP_Passup(Disc_Ind,NULL,0);
- UA_State=_send;
- UA_FBit=header->PF;
- NextState=RLP_S1;
- break;
-
- default:
- if (RLP_GetUserRequest(Conn_Req)) {
- UA_State=_send;
- UA_FBit=true;
- NextState=RLP_S4;
- RLP_Init_link_vars();
- } else if (RLP_GetUserRequest(Conn_Req_Neg)) {
- DM_State=_send; /* FIXME - code to handle DM_State - missing from spec? */
- DM_FBit=true;
- NextState=RLP_S1;
- }
- break;
- }
- }
-
- if (!Send_TXU(frame, header)) {
-
- if (UA_State == _send) {
- RLP_SendF96Frame(RLPFT_U_UA, false, UA_FBit, 0, 0, NULL, false);
- UA_State=_idle;
- }
- else
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- }
-
-
- if (RLP_GetUserRequest(Disc_Req)) {
- T=-1;
- DISC_State=_send;
- DISC_Count=0;
- DISC_PBit=(Poll_xchg==_idle);
- NextState=5;
- }
-
- break;
-
- /***** RLP State 4. *****/
-
- case RLP_S4:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 4.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch (CurrentFrameType) {
-
- case RLPFT_U_TEST:
- TEST_Handling();
- break;
- case RLPFT_U_DISC:
- T=-1;
- ResetAllT_RCVS();
- RLP_Passup(Disc_Ind,NULL,0);
- UA_State=_send;
- UA_FBit=header->PF;
- NextState=RLP_S1;
- break;
- case RLPFT_U_SABM:
- T=-1;
- ResetAllT_RCVS();
- RLP_Passup(Reset_Ind,NULL,0);
- NextState=RLP_S7;
- break;
- case RLPFT_S_RR:
- case RLPFT_S_RNR:
- case RLPFT_S_REJ:
- case RLPFT_S_SREJ:
- /* Should check here for unsolicited Fbit */
- /* Spec says: "Nr must be within the set of not yet
- acknowledged I-frames or it must be the next possible
- frame number." That's VA..VS-1 or VS, i.e. VA..VS */
- if (!InWindow(header->Nr,VA,VS))
- break;
- RLP_S_Handler(frame,header);
- break;
- case RLPFT_SI_RR:
- case RLPFT_SI_RNR:
- case RLPFT_SI_REJ:
- case RLPFT_SI_SREJ:
- /* Should check here for unsolicited Fbit */
- if (!InWindow(header->Nr,VA,VS))
- break;
- if (!RLP_I_Handler(frame,header)) RLP_S_Handler(frame,header);
- break;
- default:
- break;
- }
- }
-
- for (i=0;i<RLP_M;i++) if (T_RCVS[i]==0) {
-#ifdef RLP_DEBUG
- fprintf(stdout, "T_RCVS[%d] Timeout in State 4\n",i);
-#endif
- R[i].State=_srej;
- }
- if (T==0) {
- T=-1;
-#ifdef RLP_DEBUG
- fprintf(stdout, "T Timeout in State 4\n");
-#endif
-
- Poll_xchg=_idle;
- if (Poll_State==_idle) {
- Poll_State=_send;
- Poll_Count=0;
- }
- else {
- if (Poll_Count>RLP_N2) {
-#ifdef RLP_DEBUG
- fprintf(stdout, "N2 Errors in State 4\n");
-#endif
- }
- Poll_State=_send;
- Poll_Count++;
- }
- }
-
- if (!Send_TXU(frame,header)) {
- if (UA_State == _send) {
- RLP_SendF96Frame(RLPFT_U_UA, false, UA_FBit, 0, 0, NULL, false);
- UA_State=_idle;
- }
- else RLP_SendData();
- }
-
-
- /* Load any data from the Send ringbuffer into the send slots */
- RLP_AddRingBufferDataToSlots();
-
-#ifdef RLP_DEBUG
- // if (CurrentFrameType!=RLPFT_BAD)
- fprintf(stdout, "VD=%d, VA=%d, VS=%d, VR=%d\n",VD,VA,VS,VR);
-#ifdef RLP_DEBUG_STATE
- {
- int zzz;
-
- if(UA_State!=_idle) printf("[UA_State %d]",UA_State);
- if(UI_State!=_idle) printf("[UI_State %d]",UI_State);
- if(Ackn_State!=_idle) printf("[Ackn_State %d]",Ackn_State);
- if(Poll_State!=_idle) printf("[Poll_State %d]",Poll_State);
- if(Poll_xchg!=_idle) printf("[Poll_xchg %d]",Poll_xchg);
- if(SABM_State!=_idle) printf("[SABM_State %d]",SABM_State);
- if(DISC_State!=_idle) printf("[DISC_State %d]",DISC_State);
- if(DM_State!=_idle) printf("[DM_State %d]",DM_State);
- if(XI_R_State!=_idle) printf("[XI_R_State %d]",XI_R_State);
- if(XID_C_State!=_idle) printf("[XID_C_State %d]",XID_C_State);
- if(XID_R_State!=_idle) printf("[XID_R_State %d]",XID_R_State);
- if(TEST_R_State!=_idle) printf("[TEST_R_State %d]",TEST_R_State);
-
- printf("S: ");
- for (zzz=0; zzz<RLP_M; zzz++) printf("%d ",S[zzz].State);
- printf("\nR: ");
- for (zzz=0; zzz<RLP_M; zzz++) printf("%d ",R[zzz].State);
- printf("\nT: %d, T_RCVS: ",T);
- for (zzz=0; zzz<RLP_M; zzz++) printf("%d ",T_RCVS[zzz]);
- printf("\n");
- }
-#endif
-#endif
-
-
- if (RLP_GetUserRequest(Disc_Req)) {
- T=-1;
- ResetAllT_RCVS();
- DISC_State=_send;
- DISC_Count=0;
- DISC_PBit=(Poll_xchg==_idle);
- NextState=5;
- }
-
- break;
-
-
- /***** RLP State 5. *****/
-
- case RLP_S5:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 5.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch (CurrentFrameType) {
-
- case RLPFT_U_UA:
- case RLPFT_U_DM:
- if ((DISC_State==_wait) && (DISC_PBit==header->PF)) {
- if (DISC_PBit==true) Poll_xchg=_idle;
- T=-1;
- NextState=1;
- }
- break;
- case RLPFT_U_DISC:
- T=-1;
- UA_State=_send;
- UA_FBit=header->PF;
- NextState=1;
- break;
- default:
- break;
- }
- }
-
- if (!Send_TXU(frame,header)) {
- if ((DISC_State!=_wait) && !((DISC_PBit==true) && (Poll_xchg==_wait))) {
- RLP_SendF96Frame(RLPFT_U_DISC, true, DISC_PBit, 0, 0, NULL, false);
- if (DISC_PBit==true) Poll_xchg=_wait;
- DISC_State=_wait;
- DISC_Count++;
- RLP_SetTimer(&T);
- }
- else
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- }
-
- if (T==0) {
- if (DISC_PBit==1) Poll_xchg=_idle;
- DISC_Count++;
- if (DISC_Count>RLP_N2) {
-
-#ifdef RLP_DEBUG
- fprintf(stdout, "N2 error in State 5!\n");
-#endif
-
- }
- DISC_State=_send;
- }
-
- break;
-
- /***** RLP State 6. *****/
- /* We should only get here after a Reset_Req which is not yet supported */
-
- case RLP_S6:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 6 - not yet implemented!\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch (CurrentFrameType) {
- default:
- break;
- }
-
- }
-
- if (!Send_TXU(frame,header)) {
- }
-
- if (RLP_GetUserRequest(Disc_Req)) {
- T=-1;
- DISC_State=_send;
- DISC_Count=0;
- DISC_PBit=(Poll_xchg==_idle);
- NextState=5;
- }
-
- break;
-
-
- /***** RLP State 7. *****/
-
- case RLP_S7:
-
-#ifdef DEBUG
- fprintf(stdout, _("RLP state 7.\n"));
-#endif
-
- if (!XID_Handling(frame, header)) {
-
- switch (CurrentFrameType) {
- case RLPFT_U_DISC:
- RLP_Passup(Disc_Ind,NULL,0);
- UA_State=_send;
- UA_FBit=header->PF;
- NextState=RLP_S1;
- break;
- default:
- break;
- }
- }
-
- if (RLP_GetUserRequest(Reset_Resp)){
- UA_State=_send;
- UA_FBit=1;
- RLP_Init_link_vars();
- NextState=RLP_S4;
- }
-
- if (!Send_TXU(frame,header)) {
- RLP_SendF96Frame(RLPFT_U_NULL, false, false, 0, 0, NULL, false);
- }
-
- if (RLP_GetUserRequest(Disc_Req)) {
- T=-1;
- DISC_State=_send;
- DISC_Count=0;
- DISC_PBit=(Poll_xchg==_idle);
- NextState=5;
- }
-
- break;
-
-
- default:
-
-#ifdef DEBUG
- fprintf(stdout, _("DEBUG: Unknown RLP state!\n"));
-#endif
-
- break;
- }
-
- CurrentState=NextState;
-
-}
-
-/* Given a pointer to an RLP XID frame, display contents in human readable
- form. Note for now only Version 0 and 1 are supported. Fields can appear
- in any order and are delimited by a zero type field. This function is the
- exact implementation of section 5.2.2.6, Exchange Identification, XID of
- the GSM specification 04.22. */
-
-void RLP_DisplayXID(u8 *frame)
-{
-
- int count = 25; /* Sanity check */
- u8 type, length;
-
- fprintf(stdout, "XID: ");
-
- while ((*frame !=0) && (count >= 0)) {
-
- type = *frame >> 4;
- length = *frame & 0x0f;
-
- switch (type) {
-
- case 0x01: /* RLP Version Number, probably 1 for Nokia. */
-
- frame += length;
- fprintf(stdout, "Ver %d ", *frame);
- break;
-
- case 0x02: /* IWF to MS window size */
-
- frame += length;
- fprintf(stdout, "IWF-MS %d ", *frame);
- break;
-
- case 0x03: /* MS to IWF window size. */
-
- frame += length;
- fprintf(stdout, "MS-IWF %d ", *frame);
- break;
-
- case 0x04: /* Acknowledgement Timer (T1). */
-
- frame += length;
- fprintf(stdout, "T1 %dms ", *frame * 10);
- break;
-
- case 0x05: /* Retransmission attempts (N2). */
-
- frame += length;
- fprintf(stdout, "N2 %d ", *frame);
- break;
-
- case 0x06: /* Reply delay (T2). */
-
- frame += length;
- fprintf(stdout, "T2 %dms ", *frame * 10);
- break;
-
- case 0x07: /* Compression. */
-
- frame ++;
- fprintf(stdout, "Comp [Pt=%d ", (*frame >> 4) );
- fprintf(stdout, "P0=%d ", (*frame & 0x03) );
-
- frame ++;
- fprintf(stdout, "P1l=%d ", *frame);
- frame ++;
- fprintf(stdout, "P1h=%d ", *frame);
-
- frame ++;
- fprintf(stdout, "P2=%d] ", *frame);
- break;
-
- default:
-
- frame += length;
- fprintf(stdout, "Unknown! type=%02x, length=%02x", type, length);
- break;
-
- }
- count --;
- frame ++;
- }
-
- return;
-}
-
-/* Given a pointer to an F9.6 Frame, split data out into component parts of
- header and determine frame type. */
-
-void RLP_DecodeF96Header(RLP_F96Frame *frame, RLP_F96Header *header)
-{
-
- /* Poll/Final bit. */
-
- if ((frame->Header[1] & 0x02))
- header->PF = true;
- else
- header->PF = false;
-
- /* Command/Response bit. */
-
- if ((frame->Header[0] & 0x01))
- header->CR = true;
- else
- header->CR = false;
-
- /* Send Sequence Number. */
-
- header->Ns = frame->Header[0] >> 3;
-
- if ((frame->Header[1] & 0x01))
- header->Ns |= 0x20; /* Most significant bit. */
-
- /* Determine frame type. See the section 5.2.1 in the GSM 04.22
- specification. */
-
- switch (header->Ns) {
-
- case 0x3f: /* Frames of type U, unnumbered frames. */
-
- /* U frames have M1, ..., M5 stored in the place of N(R). */
-
- header->Type = RLPFT_U;
- header->M = (frame->Header[1] >> 2) & 0x1f;
- return; /* For U frames, we do not need N(R) and bits S1 and S2. */
-
- case 0x3e: /* Frames of type S, supervisory frames. */
-
- header->Type = RLPFT_S;
- break;
-
- default: /* Frames of type I+S, numbered information transfer ans
- supervisory frames combined. */
-
- header->Type = RLPFT_IS;
- break;
- }
-
- /* Receive Sequence Number N(R). */
- header->Nr = frame->Header[1] >> 2;
-
- /* Status bits (S1 and S2). */
- header->S = (frame->Header[0] >> 1) & 0x03;
-
- return;
-}
-
-
git://git.jankratochvil.net / gnokii.git / blobdiff