6 A Linux/Unix toolset and driver for Nokia mobile phones.
8 Released under the terms of the GNU GPL, see file COPYING for more details.
10 This file provides a virtual modem interface to the GSM phone by calling
11 code in gsm-api.c, at-emulator.c and datapump.c. The code here provides
12 the overall framework and coordinates switching between command mode
13 (AT-emulator) and "online" mode where the data pump code translates data
14 from/to the GSM handset and the modem data/fax stream.
22 /* This is the right way to include stdlib with __USE_XOPEN defined */
24 # define _XOPEN_SOURCE 500
25 # include <features.h>
35 #include <sys/types.h>
46 #include "gsm-common.h"
47 #include "data/at-emulator.h"
48 #include "data/datapump.h"
49 #include "data/virtmodem.h"
50 #include "data/rlp-common.h"
52 /* Global variables */
55 #define GNOKII_DEV "/var/gnokii-dev"
57 //extern bool TerminateThread;
61 int PtyRDFD; /* File descriptor for reading and writing to/from */
62 int PtyWRFD; /* pty interface - only different in debug mode. */
64 static bool UseSTDIO; /* Use STDIO for debugging purposes instead of pty */
67 static GSM_Error VM_GSMInitialise(char *model, char *port, char *initlength, GSM_ConnectionType connection, char *synchronizetime);
68 static int VM_PtySetup(char *bindir);
70 /* If initialised in debug mode, stdin/out is used instead
71 of ptys for interface. */
72 bool VM_Initialise(char *model,char *port, char *initlength, GSM_ConnectionType connection, char *bindir, bool debug_mode, bool GSMInit,char *synchronizetime)
76 if (debug_mode == true) {
85 fprintf (stderr , "Initialising GSM\n");
87 if ((VM_GSMInitialise(model, port, initlength, connection, synchronizetime) != GE_NONE)) {
88 fprintf (stderr, _("VM_Initialise - VM_GSMInitialise failed!\n"));
95 if (VM_PtySetup(bindir) < 0) {
96 fprintf (stderr, _("VM_Initialise - VM_PtySetup failed!\n"));
100 if (ATEM_Initialise(PtyRDFD, PtyWRFD, model, port) != true) {
101 fprintf (stderr, _("VM_Initialise - ATEM_Initialise failed!\n"));
105 if (DP_Initialise(PtyRDFD, PtyWRFD) != true) {
106 fprintf (stderr, _("VM_Initialise - DP_Initialise failed!\n"));
111 /* Create and start thread, */
112 return VM_ThreadLoop();
118 static void VM_CharHandler(void);
119 extern GSM_Error N6110_SendStatusRequest(void);
121 bool VM_ThreadLoop(void)
125 struct timeval timeout;
127 /* Note we can't use signals here as they are already used
128 in the FBUS code. This may warrant changing the FBUS
129 code around sometime to use select instead to free up
130 the SIGIO handler for mainline code. */
135 } else { /* If we are in data mode, leave it to datapump to get the data */
138 FD_SET(PtyRDFD,&readfds);
140 timeout.tv_usec=0;/*500*1000;*/
142 res = select(PtyRDFD+1,&readfds,NULL/*writefds*/,NULL/*exceptfds*/,&timeout);
145 case 0: /* Timeout */
146 N6110_SendStatusRequest();
152 perror("VM_ThreadLoop - select");
156 if (FD_ISSET(PtyRDFD,&readfds)) {
158 } else usleep(500); /* Probably the file has been closed */
166 /* Application should call VM_Terminate to shut down
167 the virtual modem thread */
168 void VM_Terminate(void)
176 static int VM_GetMasterPty(char **name);
178 /* Open pseudo tty interface and (in due course create a symlink
179 to be /dev/gnokii etc. ) */
181 static int VM_PtySetup(char *bindir)
185 char mgnokiidev[200];
194 strncpy(mgnokiidev, bindir, 200);
195 strcat(mgnokiidev, "/");
197 strncat(mgnokiidev, "mgnokiidev", 200 - strlen(bindir));
201 PtyRDFD = STDIN_FILENO;
202 PtyWRFD = STDOUT_FILENO;
206 PtyRDFD = VM_GetMasterPty(&slave_name);
208 fprintf (stderr, _("Couldn't open pty!\n"));
214 /* Check we haven't been installed setuid root for some reason
215 if so, don't create /dev/gnokii */
216 if (getuid() != geteuid()) {
217 fprintf(stderr, _("gnokiid should not be installed setuid root!\n"));
223 fprintf (stderr, _("Slave pty is %s, calling %s to create \"%s\".\n"), slave_name,
233 /* Create command line, something line ./mkgnokiidev ttyp0 */
234 sprintf(cmdline, "%s %s", mgnokiidev, slave_name);
236 /* And use system to call it. */
237 err = system (cmdline);
240 /* Remove symlink in case it already exists. Don't care if it fails. */
244 err = symlink(slave_name, GNOKII_DEV);
252 /* Handler called when characters received from serial port.
253 calls state machine code to process it. */
254 static void VM_CharHandler(void)
256 unsigned char buffer[255];
260 /* If we are in command mode, get the character, otherwise leave it */
262 if (CommandMode && ATEM_Initialised) {
264 res = read(PtyRDFD, buffer, 255);
266 /* A returned value of -1 means something serious has gone wrong - so quit!! */
267 /* Note that file closure etc. should have been dealt with in ThreadLoop */
270 // TerminateThread=true;
274 ATEM_HandleIncomingData(buffer, res);
278 /* Initialise GSM interface, returning GSM_Error as appropriate */
279 static GSM_Error VM_GSMInitialise(char *model, char *port, char *initlength, GSM_ConnectionType connection, char *synchronizetime)
284 /* Initialise the code for the GSM interface. */
286 error = GSM_Initialise(model,port, initlength, connection, RLP_DisplayF96Frame, synchronizetime);
288 if (error != GE_NONE) {
289 fprintf(stderr, _("GSM/FBUS init failed! (Unknown model ?). Quitting.\n"));
293 /* First (and important!) wait for GSM link to be active. We allow 10
296 while (count++ < 200 && *GSM_LinkOK == false) {
300 if (*GSM_LinkOK == false) {
301 fprintf (stderr, _("Hmmm... GSM_LinkOK never went true. Quitting. \n"));
309 Takes a double-indirect character pointer in which to put a slave
310 name, and returns an integer file descriptor. If it returns < 0, an
311 error has occurred. Otherwise, it has returned the master pty
312 file descriptor, and fills in *name with the name of the
313 corresponding slave pty. Once the slave pty has been opened,
314 you are responsible to free *name. Code is from Developling Linux
315 Applications by Troan and Johnson */
318 static int VM_GetMasterPty(char **name) {
320 #ifdef USE_UNIX98PTYS
323 master = open("/dev/ptmx", O_RDWR | O_NOCTTY | O_NONBLOCK);
325 err = grantpt(master);
326 err = err || unlockpt(master);
328 *name = ptsname(master);
333 #else /* USE_UNIX98PTYS */
335 /* default to returning error */
338 /* create a dummy name to fill in */
339 *name = strdup("/dev/ptyXX");
341 /* search for an unused pty */
342 for (i=0; i<16 && master <= 0; i++) {
343 for (j=0; j<16 && master <= 0; j++) {
344 (*name)[8] = "pqrstuvwxyzPQRST"[i];
345 (*name)[9] = "0123456789abcdef"[j];
346 /* open the master pty */
347 if ((master = open(*name, O_RDWR | O_NOCTTY | O_NONBLOCK )) < 0) {
348 if (errno == ENOENT) {
349 /* we are out of pty devices */
356 if ((master < 0) && (i == 16) && (j == 16)) {
357 /* must have tried every pty unsuccessfully */
362 /* By substituting a letter, we change the master pty
363 * name into the slave pty name.
367 #endif /* USE_UNIX98PTYS */