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/* (c) 2002-2003 by Michal Cihar
*
* Low level functions for communication with Alcatel One Touch phones.
*
* This code implements the protocol used for synchronisation with PC.
*/
#include "../../gsmstate.h"
#if defined(GSM_ENABLE_ALCABUS)
#include <stdio.h>
#include <string.h>
#include "../../gsmcomon.h"
#include "alcabus.h"
static GSM_Error ALCABUS_WriteMessage (GSM_StateMachine *s, unsigned char *data, int len, unsigned char type)
{
GSM_Protocol_ALCABUSData *d = &s->Protocol.Data.ALCABUS;
unsigned char buffer[1024];
int size = 0;
int sent = 0;
int i = 0, checksum = 0;
if ((type == 0) && (len == 0)) return ERR_NONE;
buffer[0] = ALCATEL_HEADER;
buffer[1] = type;
switch (type) {
case ALCATEL_CONNECT:
buffer[2] = 0x0A;
buffer[3] = 0x04;
buffer[4] = 0x00;
size = 5;
d->next_frame = ALCATEL_CONNECT_ACK;
d->busy = true;
break;
case ALCATEL_DISCONNECT:
size = 2;
d->next_frame = ALCATEL_DISCONNECT_ACK;
d->busy = true;
break;
case ALCATEL_DATA:
buffer[2] = d->out_counter;
/* Increase outgoing packet counter */
if (d->out_counter == ALCATEL_MAX_COUNTER) d->out_counter = 0;
else d->out_counter++;
buffer[3] = '\0';
buffer[4] = len;
memcpy(buffer+5, data, len);
size = 5 + len;
d->next_frame = ALCATEL_ACK;
d->busy = true;
break;
case ALCATEL_ACK:
buffer[2] = d->in_counter;
if (d->in_counter == 0) d->in_counter = 1;
size = 3;
d->next_frame = ALCATEL_DATA;
break;
default:
/* In fact, other types probably can came just from mobile... */
smprintf(s,"WARNING: Wanted to send some unknown packet (%02X)\n", type);
return ERR_NOTIMPLEMENTED;
}
/* Calculate packet checksum */
for (i=0; i<size; i++) checksum ^= buffer[i];
buffer[size] = checksum;
size ++;
GSM_DumpMessageLevel2(s, buffer, size, type);
GSM_DumpMessageLevel3(s, buffer, size, type);
while (sent != size ) {
if ((i = s->Device.Functions->WriteDevice(s,buffer + sent, size - sent)) == 0) {
return ERR_DEVICEWRITEERROR;
}
sent += i;
}
if (type == ALCATEL_CONNECT || type == ALCATEL_DISCONNECT) {
/* For connect and disconnect we need a bit larger delay */
// my_sleep(10);
while (d->busy) {
GSM_ReadDevice(s,true);
my_sleep(1);
i++;
if (i == 10) return ERR_TIMEOUT;
}
}
return ERR_NONE;
}
static GSM_Error ALCABUS_StateMachine(GSM_StateMachine *s, unsigned char rx_char)
{
GSM_Protocol_ALCABUSData *d = &s->Protocol.Data.ALCABUS;
int i;
int checksum = 0;
if (d->Msg.BufferUsed < d->Msg.Length + 1) {
d->Msg.BufferUsed = d->Msg.Length + 1;
d->Msg.Buffer = (unsigned char *)realloc(d->Msg.Buffer,d->Msg.BufferUsed);
}
/* Check for header */
if ((d->Msg.Length == 0) && (rx_char != ALCATEL_HEADER)) {
smprintf(s,"WARNING: Expecting alcatel header (%02X) but got (%02X)\n", ALCATEL_HEADER, rx_char);
return ERR_UNKNOWNRESPONSE;
/* Check for packet type */
} else if (d->Msg.Length == 1){
d->Msg.Type = rx_char;
/* Was it unexpected packet? */
if ((rx_char != d->next_frame) && (rx_char != ALCATEL_CONTROL)) {
smprintf(s,"WARNING: Expecting alcatel packet type (%02X) but got (%02X)\n", d->next_frame, rx_char);
}
/* Determine packet size */
switch (rx_char) {
case ALCATEL_ACK:
d->expected_size = 4;
break;
case ALCATEL_DATA:
/* Packet length is in it's header */
d->expected_size = -1;
break;
case ALCATEL_CONTROL:
d->expected_size = 4;
break;
case ALCATEL_CONNECT_ACK:
d->expected_size = 6;
break;
case ALCATEL_DISCONNECT_ACK:
d->expected_size = 3;
break;
default:
smprintf(s,"WARNING: Something went wrong, unknown packet received (%02X)\n", rx_char);
return ERR_UNKNOWNRESPONSE;
}
/* Check counter, we can probably ignore error here ;-) */
} else if ((d->Msg.Length == 2) && (d->Msg.Type == ALCATEL_DATA)) {
if (rx_char != d->in_counter) {
smprintf(s,"WARNING: Unexpected packet number, ignoring (expected %02X, received %02X)\n", d->in_counter, rx_char);
d->in_counter = rx_char;
}
/* Increase incoming packet counter */
if (d->in_counter == ALCATEL_MAX_COUNTER) d->in_counter = 0;
else d->in_counter++;
/* Read size for data packet */
} else if ((d->Msg.Length == 4) && (d->Msg.Type == ALCATEL_DATA)) {
/* Header till now + checksum */
d->expected_size = (int)rx_char + 6;
}
/* Write received byte into buffer */
d->Msg.Buffer[d->Msg.Length++] = rx_char;
/* Did we received whole packet? */
if (d->expected_size == d->Msg.Length) {
/* Check checksum */
for (i=0; i< (d->Msg.Length - 1); i++) checksum ^= d->Msg.Buffer[i];
if (checksum != d->Msg.Buffer[d->Msg.Length - 1]) {
/* We can only warn, as we don't know what should happend now... */
smprintf(s,"WARNING: Ignoring incorrect packet checksum!\n");
}
/* Was it data? */
if (d->Msg.Type == ALCATEL_DATA) {
/* Dispatch message */
s->Phone.Data.RequestMsg = &d->Msg;
s->Phone.Data.DispatchError = s->Phone.Functions->DispatchMessage(s);
/* Send ack */
ALCABUS_WriteMessage (s, 0, 0, ALCATEL_ACK);
/* Reset message length */
d->Msg.Length = 0;
/* Was it ack? */
} else if ((d->Msg.Type == ALCATEL_ACK) ||
(d->Msg.Type == ALCATEL_CONTROL) ||
(d->Msg.Type == ALCATEL_CONNECT_ACK) ||
(d->Msg.Type == ALCATEL_DISCONNECT_ACK)) {
/* TODO: check counter of ack? */
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE) {
smprintf(s, "Received %s ack ",
(d->Msg.Type == ALCATEL_ACK) ? "normal" :
(d->Msg.Type == ALCATEL_CONTROL) ? "control" :
(d->Msg.Type == ALCATEL_CONNECT_ACK) ? "connect" :
(d->Msg.Type == ALCATEL_DISCONNECT_ACK) ? "disconnect" :
"BUG");
smprintf(s, "0x%02x / 0x%04x", d->Msg.Type, d->Msg.Length);
DumpMessage(s->di.df, s->di.dl, d->Msg.Buffer, d->Msg.Length);
fflush(s->di.df);
}
if (s->di.dl==DL_BINARY) {
smprintf(s,"%c",0x02); /* Receiving */
smprintf(s,"%c",d->Msg.Type);
smprintf(s,"%c",d->Msg.Length/256);
smprintf(s,"%c",d->Msg.Length%256);
for (i=0;i<d->Msg.Length;i++) smprintf(s,"%c",d->Msg.Buffer[i]);
}
if (d->Msg.Type != ALCATEL_CONTROL) {
d->next_frame = ALCATEL_DATA;
d->busy = false;
}
/* Reset message length */
d->Msg.Length = 0;
}
/* Was it unexpected type? */
if ((d->Msg.Type != d->next_frame) && (d->Msg.Type != ALCATEL_CONTROL)) {
return ERR_FRAMENOTREQUESTED;
}
} /* Last byte of packet */
return ERR_NONE;
}
static GSM_Error ALCABUS_Initialise(GSM_StateMachine *s)
{
GSM_Protocol_ALCABUSData *d = &s->Protocol.Data.ALCABUS;
/* Initialise some variables */
d->Msg.BufferUsed = 0;
d->Msg.Buffer = NULL;
d->Msg.Length = 0;
d->Msg.Type = 0;
d->in_counter = 1;
d->out_counter = 0;
d->busy = false;
/* Initialise protocol */
dbgprintf ("Initializing binary mode\n");
return ALCABUS_WriteMessage (s, 0, 0, ALCATEL_CONNECT);
}
static GSM_Error ALCABUS_Terminate(GSM_StateMachine *s)
{
/* Terminate protocol */
dbgprintf ("Closing binary mode\n");
return ALCABUS_WriteMessage (s, 0, 0, ALCATEL_DISCONNECT);
}
GSM_Protocol_Functions ALCABUSProtocol = {
ALCABUS_WriteMessage,
ALCABUS_StateMachine,
ALCABUS_Initialise,
ALCABUS_Terminate
};
#endif
/* How should editor hadle tabs in this file? Add editor commands here.
* vim: noexpandtab sw=8 ts=8 sts=8:
*/
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