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authorMarcel Holtmann <marcel@holtmann.org>2009-09-05 06:57:11 +0200
committerMarcel Holtmann <marcel@holtmann.org>2009-09-05 06:57:11 +0200
commit5b09d42cb4ccea745dbb0146058c97f277b55849 (patch)
tree94331bad9e2af2b608bef94781e91e62dbaee83b
parente4d0a28b48472e34a838cd3114f72d422dc839cb (diff)
downloadofono-5b09d42cb4ccea745dbb0146058c97f277b55849.tar.bz2
Import GSM 07.10 implementation from Qtopia
-rw-r--r--gatmux/gsm0710.c572
-rw-r--r--gatmux/gsm0710_p.h113
2 files changed, 685 insertions, 0 deletions
diff --git a/gatmux/gsm0710.c b/gatmux/gsm0710.c
new file mode 100644
index 00000000..d1faa7c2
--- /dev/null
+++ b/gatmux/gsm0710.c
@@ -0,0 +1,572 @@
+/****************************************************************************
+**
+** This file is part of the Qt Extended Opensource Package.
+**
+** Copyright (C) 2009 Trolltech ASA.
+**
+** Contact: Qt Extended Information (info@qtextended.org)
+**
+** This file may be used under the terms of the GNU General Public License
+** version 2.0 as published by the Free Software Foundation and appearing
+** in the file LICENSE.GPL included in the packaging of this file.
+**
+** Please review the following information to ensure GNU General Public
+** Licensing requirements will be met:
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html.
+**
+**
+****************************************************************************/
+
+#include "gsm0710_p.h"
+#include <alloca.h>
+#include <string.h>
+#include <stdio.h>
+
+/* Initialize a GSM 07.10 context, in preparation for startup */
+void gsm0710_initialize(struct gsm0710_context *ctx)
+{
+ ctx->mode = GSM0710_MODE_BASIC;
+ ctx->frame_size = GSM0710_DEFAULT_FRAME_SIZE;
+ ctx->port_speed = 115200;
+ ctx->server = 0;
+ ctx->buffer_used = 0;
+ memset(ctx->used_channels, 0, sizeof(ctx->used_channels));
+ ctx->reinit_detect = 0;
+ ctx->reinit_detect_len = 0;
+ ctx->user_data = 0;
+ ctx->fd = -1;
+ ctx->at_command = 0;
+ ctx->read = 0;
+ ctx->write = 0;
+ ctx->deliver_data = 0;
+ ctx->deliver_status = 0;
+ ctx->debug_message = 0;
+ ctx->open_channel = 0;
+ ctx->close_channel = 0;
+ ctx->terminate = 0;
+ ctx->packet_filter = 0;
+}
+
+/* Determine if a channel is in use */
+static int is_channel_used(struct gsm0710_context *ctx, int channel)
+{
+ int index = channel / 32;
+ return ((ctx->used_channels[index] & (1L << (channel % 32))) != 0);
+}
+
+/* Mark a channel as used */
+static void mark_channel_used(struct gsm0710_context *ctx, int channel)
+{
+ int index = channel / 32;
+ ctx->used_channels[index] |= (1L << (channel % 32));
+}
+
+/* Mark a channel as unused */
+static void mark_channel_unused(struct gsm0710_context *ctx, int channel)
+{
+ int index = channel / 32;
+ ctx->used_channels[index] &= ~(1L << (channel % 32));
+}
+
+/* Write a debug message */
+static void gsm0710_debug(struct gsm0710_context *ctx, const char *msg)
+{
+ if (ctx->debug_message)
+ (*(ctx->debug_message))(ctx, msg);
+}
+
+/* Set the "reinitialize detect" string to "str". When "str" is
+ encountered in the input stream, the AT+CMUX command will be
+ re-sent and the multiplexer re-started. This is needed for
+ devices that drop out of multiplexer mode due to suspend/wakeup/etc.
+ The data at "str" must persist until the context is destroyed */
+void gsm0710_set_reinit_detect(struct gsm0710_context *ctx, const char *str)
+{
+ ctx->reinit_detect = str;
+ ctx->reinit_detect_len = (str ? strlen(str) : 0);
+}
+
+/* Start up the GSM 07.10 session on the underlying device.
+ If "send_cmux" is non-zero, then send the AT+CMUX command.
+ Otherwise the underlying device is assumed to already be
+ in multiplexing mode. Returns zero if the AT+CMUX failed */
+int gsm0710_startup(struct gsm0710_context *ctx, int send_cmux)
+{
+ int channel;
+ char command[64];
+
+ /* Discard any data in the buffer, in case of restart */
+ ctx->buffer_used = 0;
+
+ /* Send the appropriate AT+CMUX command */
+ if (send_cmux) {
+ int speed;
+ switch (ctx->port_speed) {
+ case 9600: speed = 1; break;
+ case 19200: speed = 2; break;
+ case 38400: speed = 3; break;
+ case 57600: speed = 4; break;
+ case 115200: speed = 5; break;
+ case 230400: speed = 6; break;
+ default: speed = 5; break;
+ }
+ sprintf(command, "AT+CMUX=%d,0,%d,%d",
+ ctx->mode, speed, ctx->frame_size);
+ if (!ctx->at_command || !(*(ctx->at_command))(ctx, command)) {
+ gsm0710_debug
+ (ctx, "could not initialize multiplexing with AT+CMUX");
+ return 0;
+ }
+ }
+
+ /* Open the control channel */
+ gsm0710_write_frame(ctx, 0, GSM0710_OPEN_CHANNEL, 0, 0);
+
+ /* Open previously-used channels if this is a reinit.
+ Send "ERROR" on re-opened channels, to cause higher
+ layers to abort pending AT commands */
+ for (channel = 1; channel <= GSM0710_MAX_CHANNELS; ++channel) {
+ if (is_channel_used(ctx, channel)) {
+ gsm0710_write_frame(ctx, channel, GSM0710_OPEN_CHANNEL, 0, 0);
+ if (ctx->deliver_data)
+ (*ctx->deliver_data)(ctx, channel, "\r\nERROR\r\n", 9);
+ }
+ }
+ return 1;
+}
+
+/* Shut down the GSM 07.10 session, closing all channels */
+void gsm0710_shutdown(struct gsm0710_context *ctx)
+{
+ static const char terminate[2] =
+ {GSM0710_TERMINATE_BYTE1, GSM0710_TERMINATE_BYTE2};
+ if (!ctx->server) {
+ int channel;
+ for (channel = 1; channel <= GSM0710_MAX_CHANNELS; ++channel) {
+ if(is_channel_used(ctx, channel)) {
+ gsm0710_write_frame(ctx, channel, GSM0710_CLOSE_CHANNEL, 0, 0);
+ }
+ }
+ gsm0710_write_frame(ctx, 0, GSM0710_DATA, terminate, 2);
+ }
+ memset(ctx->used_channels, 0, sizeof(ctx->used_channels));
+}
+
+/* Open a specific channel. Returns non-zero if successful */
+int gsm0710_open_channel(struct gsm0710_context *ctx, int channel)
+{
+ if (channel <= 0 || channel > GSM0710_MAX_CHANNELS)
+ return 0; /* Invalid channel number */
+ if (is_channel_used(ctx, channel))
+ return 1; /* Channel is already open */
+ mark_channel_used(ctx, channel);
+ if (!ctx->server)
+ gsm0710_write_frame(ctx, channel, GSM0710_OPEN_CHANNEL, 0, 0);
+ return 1;
+}
+
+/* Close a specific channel */
+void gsm0710_close_channel(struct gsm0710_context *ctx, int channel)
+{
+ if (channel <= 0 || channel > GSM0710_MAX_CHANNELS)
+ return; /* Invalid channel number */
+ if (!is_channel_used(ctx, channel))
+ return; /* Channel is already closed */
+ mark_channel_unused(ctx, channel);
+ if (!ctx->server)
+ gsm0710_write_frame(ctx, channel, GSM0710_CLOSE_CHANNEL, 0, 0);
+}
+
+/* Determine if a specific channel is open */
+int gsm0710_is_channel_open(struct gsm0710_context *ctx, int channel)
+{
+ if (channel <= 0 || channel > GSM0710_MAX_CHANNELS)
+ return 0; /* Invalid channel number */
+ return is_channel_used(ctx, channel);
+}
+
+static const unsigned char crc_table[256] = {
+ 0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75,
+ 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
+ 0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69,
+ 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
+ 0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D,
+ 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
+ 0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51,
+ 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
+ 0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05,
+ 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
+ 0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19,
+ 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
+ 0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D,
+ 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
+ 0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21,
+ 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
+ 0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95,
+ 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
+ 0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89,
+ 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
+ 0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD,
+ 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
+ 0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1,
+ 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
+ 0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5,
+ 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
+ 0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9,
+ 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
+ 0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD,
+ 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
+ 0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1,
+ 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
+};
+
+int gsm0710_compute_crc(const char *data, int len)
+{
+ int sum = 0xFF;
+ while ( len > 0 ) {
+ sum = crc_table[ ( sum ^ *data++ ) & 0xFF ];
+ --len;
+ }
+ return (~sum & 0xFF);
+}
+
+/* Process an incoming GSM 07.10 packet */
+static int gsm0710_packet( struct gsm0710_context *ctx, int channel, int type,
+ const char *data, int len )
+{
+ if (ctx->packet_filter &&
+ (*(ctx->packet_filter))(ctx, channel, type, data, len)) {
+ /* The filter has extracted and processed the packet */
+ return 1;
+ }
+ if (type == 0xEF || type == 0x03) {
+
+ if (channel >= 1 && channel <= GSM0710_MAX_CHANNELS &&
+ is_channel_used(ctx, channel)) {
+ /* Ordinary data packet */
+ if (ctx->deliver_data)
+ (*(ctx->deliver_data))(ctx, channel, data, len);
+ } else if (channel == 0) {
+ /* An embedded command or response on channel 0 */
+ if (len >= 2 && data[0] == (char)GSM0710_STATUS_SET) {
+ return gsm0710_packet(ctx, channel, GSM0710_STATUS_ACK,
+ data + 2, len - 2);
+ } else if (len >= 2 && data[0] == (char)0xC3 && ctx->server) {
+ /* Incoming terminate request on server side */
+ for (channel = 1; channel <= GSM0710_MAX_CHANNELS; ++channel) {
+ if (is_channel_used(ctx, channel)) {
+ if (ctx->close_channel)
+ (*(ctx->close_channel))(ctx, channel);
+ }
+ }
+ memset(ctx->used_channels, 0, sizeof(ctx->used_channels));
+ if (ctx->terminate)
+ (*(ctx->terminate))(ctx);
+ return 0;
+ } else if (len >= 2 && data[0] == (char)0x43) {
+ /* Test command from other side - send the same bytes back */
+ char *resp = (char *)alloca(len);
+ memcpy(resp, data, len);
+ resp[0] = (char)0x41; /* Clear the C/R bit in the response */
+ gsm0710_write_frame(ctx, 0, GSM0710_DATA, resp, len);
+ }
+ }
+
+ } else if (type == GSM0710_STATUS_ACK && channel == 0) {
+
+ /* Status change message */
+ if (len >= 2) {
+ /* Handle status changes on other channels */
+ channel = ((data[0] & 0xFC) >> 2);
+ if (channel >= 1 && channel <= GSM0710_MAX_CHANNELS &&
+ is_channel_used(ctx, channel)) {
+ if (ctx->deliver_status)
+ (*(ctx->deliver_status))(ctx, channel, data[1] & 0xFF);
+ }
+ }
+
+ /* Send the response to the status change request to ACK it */
+ gsm0710_debug(ctx, "received status line signal, sending response");
+ char resp[33];
+ if ( len > 31 )
+ len = 31;
+ resp[0] = (char)GSM0710_STATUS_ACK;
+ resp[1] = (char)((len << 1) | 0x01);
+ memcpy(resp + 2, data, len);
+ gsm0710_write_frame(ctx, 0, GSM0710_DATA, resp, len + 2);
+
+ } else if (type == (0x3F & 0xEF) && ctx->server) {
+
+ /* Incoming channel open request on server side */
+ if (channel >= 1 && channel <= GSM0710_MAX_CHANNELS) {
+ if (!is_channel_used(ctx, channel)) {
+ mark_channel_used(ctx, channel);
+ if (ctx->open_channel)
+ (*(ctx->open_channel))(ctx, channel);
+ }
+ }
+
+ } else if (type == (0x53 & 0xEF) && ctx->server) {
+
+ /* Incoming channel close request on server side */
+ if (channel >= 1 && channel <= GSM0710_MAX_CHANNELS) {
+ if (is_channel_used(ctx, channel)) {
+ mark_channel_unused(ctx, channel);
+ if (ctx->close_channel)
+ (*(ctx->close_channel))(ctx, channel);
+ }
+ }
+
+ }
+ return 1;
+}
+
+/* Function that is called when the underlying device is ready to be read.
+ A callback will be made to ctx->read to get the data for processing */
+void gsm0710_ready_read(struct gsm0710_context *ctx)
+{
+ /* Read more data from the underlying serial device */
+ if (!ctx->read)
+ return;
+ int len = (*(ctx->read))(ctx, ctx->buffer + ctx->buffer_used,
+ sizeof(ctx->buffer) - ctx->buffer_used);
+ if ( len <= 0 )
+ return;
+
+ /* Update the buffer size */
+ ctx->buffer_used += len;
+
+ /* Check for the re-initialization detection string */
+ if (!ctx->server && ctx->reinit_detect_len &&
+ len >= ctx->reinit_detect_len &&
+ !memcmp(ctx->buffer, ctx->reinit_detect, ctx->reinit_detect_len)) {
+ gsm0710_startup(ctx, 1);
+ return;
+ }
+
+ /* Break the incoming data up into packets */
+ int posn = 0;
+ int posn2;
+ int header_size;
+ int channel, type;
+ while (posn < ctx->buffer_used) {
+ if (ctx->buffer[posn] == (char)0xF9) {
+
+ /* Basic format: skip additional 0xF9 bytes between frames */
+ while ((posn + 1) < ctx->buffer_used &&
+ ctx->buffer[posn + 1] == (char)0xF9) {
+ ++posn;
+ }
+
+ /* We need at least 4 bytes for the header */
+ if ((posn + 4) > ctx->buffer_used)
+ break;
+
+ /* The low bit of the second byte should be 1,
+ which indicates a short channel number */
+ if ((ctx->buffer[posn + 1] & 0x01 ) == 0) {
+ ++posn;
+ continue;
+ }
+
+ /* Get the packet length and validate it */
+ len = (ctx->buffer[posn + 3] >> 1) & 0x7F;
+ if ((ctx->buffer[posn + 3] & 0x01) != 0) {
+ /* Single-byte length indication */
+ header_size = 3;
+ } else {
+ /* Double-byte length indication */
+ if ((posn + 5) > ctx->buffer_used)
+ break;
+ len |= ((int)(unsigned char)(ctx->buffer[posn + 4])) << 7;
+ header_size = 4;
+ }
+ if ((posn + header_size + 2 + len) > ctx->buffer_used )
+ break;
+
+ /* Verify the packet header checksum */
+ if (((gsm0710_compute_crc(ctx->buffer + posn + 1, header_size) ^
+ ctx->buffer[posn + len + header_size + 1]) & 0xFF)
+ != 0) {
+ gsm0710_debug(ctx, "*** GSM 07.10 checksum check failed ***");
+ posn += len + header_size + 2;
+ continue;
+ }
+
+ /* Get the channel number and packet type from the header */
+ channel = (ctx->buffer[posn + 1] >> 2) & 0x3F;
+ type = ctx->buffer[posn + 2] & 0xEF; /* Strip "PF" bit */
+
+ /* Dispatch data packets to the appropriate channel */
+ if (!gsm0710_packet(ctx, channel, type,
+ ctx->buffer + posn + header_size + 1, len)) {
+ /* Session has been terminated */
+ ctx->buffer_used = 0;
+ return;
+ }
+ posn += len + header_size + 2;
+
+ } else if (ctx->buffer[posn] == (char)0x7E) {
+
+ /* Advanced format: skip additional 0x7E bytes between frames */
+ while ((posn + 1) < ctx->buffer_used &&
+ ctx->buffer[posn + 1] == (char)0x7E) {
+ ++posn;
+ }
+
+ /* Search for the end of the packet (the next 0x7E byte) */
+ len = posn + 1;
+ while (len < ctx->buffer_used &&
+ ctx->buffer[len] != (char)0x7E) {
+ ++len;
+ }
+ if (len >= ctx->buffer_used) {
+ /* There are insufficient bytes for a packet at present */
+ if ( posn == 0 && len >= (int)sizeof( ctx->buffer ) ) {
+ /* The buffer is full and we were unable to find a
+ legitimate packet. Discard the buffer and restart */
+ posn = len;
+ }
+ break;
+ }
+
+ /* Undo control byte quoting in the packet */
+ posn2 = 0;
+ ++posn;
+ while (posn < len) {
+ if (ctx->buffer[posn] == 0x7D) {
+ ++posn;
+ if ( posn >= len)
+ break;
+ ctx->buffer[posn2++] = (char)(ctx->buffer[posn++] ^ 0x20);
+ } else {
+ ctx->buffer[posn2++] = ctx->buffer[posn++];
+ }
+ }
+
+ /* Validate the checksum on the packet header */
+ if (posn2 >= 3) {
+ if (((gsm0710_compute_crc(ctx->buffer, 2) ^
+ ctx->buffer[posn2 - 1]) & 0xFF) != 0 ) {
+ gsm0710_debug(ctx, "*** GSM 07.10 advanced checksum "
+ "check failed ***");
+ continue;
+ }
+ } else {
+ gsm0710_debug(ctx, "*** GSM 07.10 advanced packet "
+ "is too small ***");
+ continue;
+ }
+
+ /* Decode and dispatch the packet */
+ channel = (ctx->buffer[0] >> 2) & 0x3F;
+ type = ctx->buffer[1] & 0xEF; /* Strip "PF" bit */
+ if (!gsm0710_packet(ctx, channel, type,
+ ctx->buffer + 2, posn2 - 3)) {
+ /* Session has been terminated */
+ ctx->buffer_used = 0;
+ return;
+ }
+
+ } else {
+ ++posn;
+ }
+ }
+ if ( posn < ctx->buffer_used ) {
+ memmove( ctx->buffer, ctx->buffer + posn, ctx->buffer_used - posn );
+ ctx->buffer_used -= posn;
+ } else {
+ ctx->buffer_used = 0;
+ }
+}
+
+/* Write a raw GSM 07.10 frame to the underlying device */
+void gsm0710_write_frame(struct gsm0710_context *ctx, int channel, int type,
+ const char *data, int len)
+{
+ char *frame = (char *)alloca(ctx->frame_size * 2 + 8);
+ int size;
+ if (len > ctx->frame_size)
+ len = ctx->frame_size;
+ if (ctx->mode) {
+ int temp, crc;
+ frame[0] = (char)0x7E;
+ frame[1] = (char)((channel << 2) | 0x03);
+ frame[2] = (char)type;
+ crc = gsm0710_compute_crc(frame + 1, 2);
+ if ( type == 0x7E || type == 0x7D ) {
+ /* Need to quote the type field now that crc has been computed */
+ frame[2] = (char)0x7D;
+ frame[3] = (char)(type ^ 0x20);
+ size = 4;
+ } else {
+ size = 3;
+ }
+ while ( len > 0 ) {
+ temp = *data++ & 0xFF;
+ --len;
+ if ( temp != 0x7E && temp != 0x7D ) {
+ frame[size++] = (char)temp;
+ } else {
+ frame[size++] = (char)0x7D;
+ frame[size++] = (char)(temp ^ 0x20);
+ }
+ }
+ if ( crc != 0x7E && crc != 0x7D ) {
+ frame[size++] = (char)crc;
+ } else {
+ frame[size++] = (char)0x7D;
+ frame[size++] = (char)(crc ^ 0x20);
+ }
+ frame[size++] = (char)0x7E;
+ } else {
+ int header_size;
+ frame[0] = (char)0xF9;
+ frame[1] = (char)((channel << 2) | 0x03);
+ frame[2] = (char)type;
+ if (len <= 127) {
+ frame[3] = (char)((len << 1) | 0x01);
+ header_size = size = 4;
+ } else {
+ frame[3] = (char)(len << 1);
+ frame[4] = (char)(len >> 7);
+ header_size = size = 5;
+ }
+ if (len > 0) {
+ memcpy(frame + size, data, len);
+ size += len;
+ }
+ /* Note: GSM 07.10 says that the CRC is only computed over the header */
+ frame[size++] = (char)gsm0710_compute_crc(frame + 1, header_size - 1);
+ frame[size++] = (char)0xF9;
+ }
+ if (ctx->write)
+ (*(ctx->write))(ctx, frame, size);
+}
+
+/* Write a block of data to the the underlying device. It will be split
+ into several frames according to the frame size, if necessary */
+void gsm0710_write_data(struct gsm0710_context *ctx, int channel,
+ const void *data, int len)
+{
+ int temp;
+ while (len > 0) {
+ temp = len;
+ if (temp > ctx->frame_size)
+ temp = ctx->frame_size;
+ gsm0710_write_frame(ctx, channel, GSM0710_DATA, data, temp);
+ data = (const void *)(((const char *)data) + temp);
+ len -= temp;
+ }
+}
+
+/* Set the modem status lines on a channel */
+void gsm0710_set_status(struct gsm0710_context *ctx, int channel, int status)
+{
+ char data[4];
+ data[0] = (char)GSM0710_STATUS_SET;
+ data[1] = (char)0x03;
+ data[2] = (char)((channel << 2) | 0x03);
+ data[3] = (char)status;
+ gsm0710_write_frame(ctx, 0, GSM0710_DATA, data, 4);
+}
diff --git a/gatmux/gsm0710_p.h b/gatmux/gsm0710_p.h
new file mode 100644
index 00000000..3807d72e
--- /dev/null
+++ b/gatmux/gsm0710_p.h
@@ -0,0 +1,113 @@
+/****************************************************************************
+**
+** This file is part of the Qt Extended Opensource Package.
+**
+** Copyright (C) 2009 Trolltech ASA.
+**
+** Contact: Qt Extended Information (info@qtextended.org)
+**
+** This file may be used under the terms of the GNU General Public License
+** version 2.0 as published by the Free Software Foundation and appearing
+** in the file LICENSE.GPL included in the packaging of this file.
+**
+** Please review the following information to ensure GNU General Public
+** Licensing requirements will be met:
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html.
+**
+**
+****************************************************************************/
+
+#ifndef GSM0710_P_H
+#define GSM0710_P_H
+
+//
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt Extended API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GSM0710_BUFFER_SIZE 4096
+#define GSM0710_DEFAULT_FRAME_SIZE 31
+#define GSM0710_MAX_CHANNELS 63
+
+#define GSM0710_MODE_BASIC 0
+#define GSM0710_MODE_ADVANCED 1
+
+/* Frame types and subtypes */
+#define GSM0710_OPEN_CHANNEL 0x3F
+#define GSM0710_CLOSE_CHANNEL 0x53
+#define GSM0710_DATA 0xEF
+#define GSM0710_DATA_ALT 0x03
+#define GSM0710_STATUS_SET 0xE3
+#define GSM0710_STATUS_ACK 0xE1
+#define GSM0710_TERMINATE_BYTE1 0xC3
+#define GSM0710_TERMINATE_BYTE2 0x01
+
+/* Status flags */
+#define GSM0710_FC 0x02
+#define GSM0710_DTR 0x04
+#define GSM0710_DSR 0x04
+#define GSM0710_RTS 0x08
+#define GSM0710_CTS 0x08
+#define GSM0710_DCD 0x80
+
+struct gsm0710_context
+{
+ /* GSM 07.10 implementation details */
+ int mode;
+ int frame_size;
+ int port_speed;
+ int server;
+ char buffer[GSM0710_BUFFER_SIZE];
+ int buffer_used;
+ unsigned long used_channels[(GSM0710_MAX_CHANNELS + 31) / 32];
+ const char *reinit_detect;
+ int reinit_detect_len;
+
+ /* Hooks to other levels */
+ void *user_data;
+ int fd;
+ int (*at_command)(struct gsm0710_context *ctx, const char *cmd);
+ int (*read)(struct gsm0710_context *ctx, void *data, int len);
+ int (*write)(struct gsm0710_context *ctx, const void *data, int len);
+ void (*deliver_data)(struct gsm0710_context *ctx, int channel,
+ const void *data, int len);
+ void (*deliver_status)(struct gsm0710_context *ctx,
+ int channel, int status);
+ void (*debug_message)(struct gsm0710_context *ctx, const char *msg);
+ void (*open_channel)(struct gsm0710_context *ctx, int channel);
+ void (*close_channel)(struct gsm0710_context *ctx, int channel);
+ void (*terminate)(struct gsm0710_context *ctx);
+ int (*packet_filter)(struct gsm0710_context *ctx, int channel,
+ int type, const char *data, int len);
+};
+
+void gsm0710_initialize(struct gsm0710_context *ctx);
+void gsm0710_set_reinit_detect(struct gsm0710_context *ctx, const char *str);
+int gsm0710_startup(struct gsm0710_context *ctx, int send_cmux);
+void gsm0710_shutdown(struct gsm0710_context *ctx);
+int gsm0710_open_channel(struct gsm0710_context *ctx, int channel);
+void gsm0710_close_channel(struct gsm0710_context *ctx, int channel);
+int gsm0710_is_channel_open(struct gsm0710_context *ctx, int channel);
+void gsm0710_ready_read(struct gsm0710_context *ctx);
+void gsm0710_write_frame(struct gsm0710_context *ctx, int channel, int type,
+ const char *data, int len);
+void gsm0710_write_data(struct gsm0710_context *ctx, int channel,
+ const void *data, int len);
+void gsm0710_set_status(struct gsm0710_context *ctx, int channel, int status);
+int gsm0710_compute_crc(const char *data, int len);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif