/****************************************************************************
*
* $Id: linphonec.c,v 1.53 2007/02/13 21:31:01 smorlat Exp $
*
* Copyright (C) 2006 Sandro Santilli <strk@keybit.net>
* Copyright (C) 2002 Florian Winterstein <flox@gmx.net>
* Copyright (C) 2000 Simon MORLAT <simon.morlat@free.fr>
*
****************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
****************************************************************************/
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <limits.h>
#include <linphonecore.h>
#include "linphonec.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_GETTEXT
#include <libintl.h>
#ifndef _
#define _(String) gettext(String)
#endif
#else
#define _(something) (something)
#endif
/***************************************************************************
*
* Types
*
***************************************************************************/
typedef struct {
LinphoneAuthInfo *elem[MAX_PENDING_AUTH];
int nitems;
} LPC_AUTH_STACK;
/***************************************************************************
*
* Forward declarations
*
***************************************************************************/
char *lpc_strip_blanks(char *input);
static int handle_configfile_migration(void);
static int copy_file(const char *from, const char *to);
static int linphonec_parse_cmdline(int argc, char **argv);
static int linphonec_initialize_readline(void);
static int linphonec_finish_readline();
static int linphonec_init(int argc, char **argv);
static int linphonec_main_loop (LinphoneCore * opm, char * sipAddr);
static int linphonec_idle_call (void);
static char **linephonec_readline_completion(const char *text,
int start, int end);
/* These are callback for linphone core */
static void linphonec_call_received(LinphoneCore *lc, const char *from);
static void linphonec_prompt_for_auth(LinphoneCore *lc, const char *realm,
const char *username);
static void linphonec_display_something (LinphoneCore * lc, const char *something);
static void linphonec_display_url (LinphoneCore * lc, const char *something, const char *url);
static void linphonec_display_warning (LinphoneCore * lc, const char *something);
static void stub () {}
static void linphonec_notify_received(LinphoneCore *lc,LinphoneFriend *fid,
const char *from, const char *status, const char *img);
static void linphonec_new_unknown_subscriber(LinphoneCore *lc,
LinphoneFriend *lf, const char *url);
static void linphonec_bye_received(LinphoneCore *lc, const char *from);
static void linphonec_text_received(LinphoneCore *lc, LinphoneChatRoom *cr,
const char *from, const char *msg);
static void linphonec_display_status (LinphoneCore * lc, const char *something);
/***************************************************************************
*
* Global variables
*
***************************************************************************/
LinphoneCore linphonec;
FILE *mylogfile;
static char *histfile_name=NULL;
static char last_in_history[256];
//auto answer (-a) option
static bool_t auto_answer=FALSE;
static bool_t answer_call=FALSE;
static bool_t video_enabled=FALSE;
LPC_AUTH_STACK auth_stack;
static int trace_level = 0;
static char *logfile_name = NULL;
static char configfile_name[PATH_MAX];
static char *sipAddr = NULL; /* for autocall */
char prompt[PROMPT_MAX_LEN];
LinphoneCoreVTable linphonec_vtable = {
show:(ShowInterfaceCb) stub,
inv_recv: linphonec_call_received,
bye_recv: linphonec_bye_received,
notify_recv: linphonec_notify_received,
new_unknown_subscriber: linphonec_new_unknown_subscriber,
auth_info_requested: linphonec_prompt_for_auth,
display_status:linphonec_display_status,
display_message:linphonec_display_something,
#ifdef VINCENT_MAURY_RSVP
/* the yes/no dialog box */
display_yes_no: (DisplayMessageCb) stub,
#endif
display_warning:linphonec_display_warning,
display_url:linphonec_display_url,
display_question:stub,
text_received:linphonec_text_received,
general_state:NULL
};
/***************************************************************************
*
* Linphone core callbacks
*
***************************************************************************/
/*
* Linphone core callback
*/
static void
linphonec_display_something (LinphoneCore * lc, const char *something)
{
fprintf (stdout, "%s\n", something);
}
/*
* Linphone core callback
*/
static void
linphonec_display_status (LinphoneCore * lc, const char *something)
{
fprintf (stdout, "%s\n", something);
}
/*
* Linphone core callback
*/
static void
linphonec_display_warning (LinphoneCore * lc, const char *something)
{
fprintf (stdout, "Warning: %s\n", something);
}
/*
* Linphone core callback
*/
static void
linphonec_display_url (LinphoneCore * lc, const char *something, const char *url)
{
fprintf (stdout, "%s : %s\n", something, url);
}
/*
* Linphone core callback
*/
static void
linphonec_call_received(LinphoneCore *lc, const char *from)
{
if ( auto_answer) {
answer_call=TRUE;
}
}
/*
* Linphone core callback
*/
static void
linphonec_prompt_for_auth(LinphoneCore *lc, const char *realm, const char *username)
{
LinphoneAuthInfo *pending_auth;
if ( auth_stack.nitems+1 > MAX_PENDING_AUTH )
{
fprintf(stderr,
"Can't accept another authentication request.\n"
"Consider incrementing MAX_PENDING_AUTH macro.\n");
return;
}
pending_auth=linphone_auth_info_new(username,NULL,NULL,NULL,realm);
auth_stack.elem[auth_stack.nitems++]=pending_auth;
}
/*
* Linphone core callback
*/
static void
linphonec_notify_received(LinphoneCore *lc,LinphoneFriend *fid,
const char *from, const char *status, const char *img)
{
printf("Friend %s is %s\n", from, status);
// todo: update Friend list state (unimplemented)
}
/*
* Linphone core callback
*/
static void
linphonec_new_unknown_subscriber(LinphoneCore *lc, LinphoneFriend *lf,
const char *url)
{
printf("Friend %s requested subscription "
"(accept/deny is not implemented yet)\n", url);
// This means that this person wishes to be notified
// of your presence information (online, busy, away...).
}
/*
* Linphone core callback
*/
static void
linphonec_bye_received(LinphoneCore *lc, const char *from)
{
// Should change prompt back to original maybe
// printing this is unneeded as we'd get a "Communication ended"
// message trough display_status callback anyway
//printf("Bye received from %s\n", from);
}
/*
* Linphone core callback
*/
static void
linphonec_text_received(LinphoneCore *lc, LinphoneChatRoom *cr,
const char *from, const char *msg)
{
printf("%s: %s\n", from, msg);
// TODO: provide mechanism for answering.. ('say' command?)
}
/***************************************************************************/
/*
* Main
*
* Use globals:
*
* - char *histfile_name
* - FILE *mylogfile
*/
int
main (int argc, char *argv[])
{
if (! linphonec_init(argc, argv) ) exit(EXIT_FAILURE);
linphonec_main_loop (&linphonec, sipAddr);
linphonec_finish(EXIT_SUCCESS);
exit(EXIT_SUCCESS); /* should never reach here */
}
/*
* Initialize linphonec
*/
static int
linphonec_init(int argc, char **argv)
{
//g_mem_set_vtable(&dbgtable);
/*
* Set initial values for global variables
*/
mylogfile = NULL;
snprintf(configfile_name, PATH_MAX, "%s/.linphonerc",
getenv("HOME"));
/* Handle configuration filename changes */
switch (handle_configfile_migration())
{
case -1: /* error during file copies */
fprintf(stderr,
"Error in configuration file migration\n");
break;
case 0: /* nothing done */
case 1: /* migrated */
default:
break;
}
#ifdef ENABLE_NLS
if (NULL == bindtextdomain (GETTEXT_PACKAGE, PACKAGE_LOCALE_DIR))
perror ("bindtextdomain failed");
#ifndef __ARM__
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif
textdomain (GETTEXT_PACKAGE);
#else
printf ("NLS disabled.\n");
#endif
linphonec_parse_cmdline(argc, argv);
if (trace_level > 0)
{
if (logfile_name != NULL)
mylogfile = fopen (logfile_name, "w+");
if (mylogfile == NULL)
{
mylogfile = stdout;
fprintf (stderr,
"INFO: no logfile, logging to stdout\n");
}
linphone_core_enable_logs(mylogfile);
}
else
{
linphone_core_disable_logs();
}
/*
* Initialize auth stack
*/
auth_stack.nitems=0;
/*
* Initialize linphone core
*/
linphone_core_init (&linphonec, &linphonec_vtable, configfile_name,
NULL);
linphone_core_enable_video(&linphonec,video_enabled);
if (!video_enabled) printf("Warning: video is disabled in linphonec. Run with -V option to enable it.\n");
/*
* Initialize readline
*/
linphonec_initialize_readline();
/*
* Initialize signal handlers
*/
signal(SIGTERM, linphonec_finish);
signal(SIGINT, linphonec_finish);
return 1;
}
/*
* Close linphonec, cleanly terminating
* any pending call
*/
void
linphonec_finish(int exit_status)
{
printf("Terminating...\n");
/* Terminate any pending call */
linphonec_parse_command_line(&linphonec, "terminate");
linphonec_finish_readline();
linphone_core_uninit (&linphonec);
if (mylogfile != NULL && mylogfile != stdout)
{
fclose (mylogfile);
}
exit(exit_status);
}
/*
* This is called from idle_call() whenever
* pending_auth != NULL.
*
* It prompts user for a password.
* Hitting ^D (EOF) would make this function
* return 0 (Cancel).
* Any other input would try to set linphone core
* auth_password for the pending_auth, add the auth_info
* and return 1.
*/
int
linphonec_prompt_for_auth_final(LinphoneCore *lc)
{
char *input, *iptr;
char auth_prompt[256];
rl_hook_func_t *old_event_hook;
LinphoneAuthInfo *pending_auth=auth_stack.elem[auth_stack.nitems-1];
snprintf(auth_prompt, 256, "Password for %s on %s: ",
pending_auth->username, pending_auth->realm);
printf("\n");
/*
* Disable event hook to avoid entering an
* infinite loop. This would prevent idle_call
* from being called during authentication reads.
* Note that it might be undesiderable...
*/
old_event_hook=rl_event_hook;
rl_event_hook=NULL;
while (1)
{
input=readline(auth_prompt);
/*
* If EOF (^D) is sent you probably don't want
* to provide an auth password... should give up
* the operation, but there's no mechanism to
* send this info back to caller currently...
*/
if ( ! input )
{
printf("Cancel requested, but not implemented.\n");
continue;
}
/* Strip blanks */
iptr=lpc_strip_blanks(input);
/*
* Only blanks, continue asking
*/
if ( ! *iptr )
{
free(input);
continue;
}
/* Something typed, let's try */
break;
}
/*
* No check is done here to ensure password is correct.
* I guess password will be asked again later.
*/
linphone_auth_info_set_passwd(pending_auth, input);
linphone_core_add_auth_info(lc, pending_auth);
--(auth_stack.nitems);
/*
* Reset line_buffer, to avoid the password
* to be used again from outer readline
*/
rl_line_buffer[0]='\0';
rl_event_hook=old_event_hook;
return 1;
}
void
print_usage (int exit_status)
{
fprintf (stdout, "\n\
usage: linphonec [-c file] [-s sipaddr] [-a] [-V] [-d level ] [-l logfile]\n\
linphonec -v\n\
\n\
-c file specify path of configuration file.\n\
-d level be verbose. 0 is no output. 6 is all output\n\
-l logfile specify the log file for your SIP phone\n\
-s sipaddress specify the sip call to do at startup\n\
-a enable auto answering for incoming calls\n\
-V enable video (disabled by default)\n\
-v or --version display version and exits.\n");
exit(exit_status);
}
/*
*
* Called every second from main read loop.
*
* Will use the following globals:
*
* - LinphoneCore linphonec
* - LPC_AUTH_STACK auth_stack;
*
*/
static int
linphonec_idle_call ()
{
LinphoneCore *opm=&linphonec;
/* Uncomment the following to verify being called */
/* printf(".\n"); */
linphone_core_iterate(opm);
if (answer_call){
fprintf (stdout, "-------auto answering to call-------\n" );
linphone_core_accept_call(opm,NULL);
answer_call=FALSE;
}
#if 0 /* Automatic exit should be requested with a command line switch */
/* Quit if autocall mode was on and no call is in progress */
if ( sipAddr != NULL && opm->call == NULL )
{
linphonec_parse_command_line(&linphonec, "quit");
}
#endif
if ( auth_stack.nitems )
{
/*
* Inhibit command completion
* during password prompts
*/
rl_inhibit_completion=1;
linphonec_prompt_for_auth_final(opm);
rl_inhibit_completion=0;
}
return 0;
}
/*
* Use globals:
*
* - char *histfile_name (also sets this)
* - char *last_in_history (allocates it)
*/
static int
linphonec_initialize_readline()
{
/*rl_bind_key('\t', rl_insert);*/
/* Allow conditional parsing of ~/.inputrc */
rl_readline_name = "linphonec";
/* Call idle_call() every second */
rl_set_keyboard_input_timeout(LPC_READLINE_TIMEOUT);
rl_event_hook=linphonec_idle_call;
/* Set history file and read it */
histfile_name = ms_strdup_printf ("%s/.linphonec_history",
getenv("HOME"));
read_history(histfile_name);
/* Initialized last_in_history cache*/
last_in_history[0] = '\0';
/* Register a completion function */
rl_attempted_completion_function = linephonec_readline_completion;
/* printf("Readline initialized.\n"); */
return 0;
}
/*
* Uses globals:
*
* - char *histfile_name (writes history to file and frees it)
* - char *last_in_history (frees it)
*
*/
static int
linphonec_finish_readline()
{
stifle_history(HISTSIZE);
write_history(histfile_name);
free(histfile_name);
histfile_name=NULL;
return 0;
}
static int
linphonec_main_loop (LinphoneCore * opm, char * sipAddr)
{
char buf[LINE_MAX_LEN]; /* auto call handling */
bool_t run=TRUE;
char *input;
#ifdef IDENTITY_AS_PROMPT
snprintf(prompt, PROMPT_MAX_LEN, "%s> ",
linphone_core_get_primary_contact(opm));
#else
snprintf(prompt, PROMPT_MAX_LEN, "linphonec> ");
#endif
/* auto call handling */
if (sipAddr != NULL )
{
snprintf (buf, sizeof(buf),"call %s", sipAddr);
run=linphonec_parse_command_line(&linphonec, buf);
}
while ((input=readline(prompt)))
{
char *iptr; /* input and input pointer */
size_t input_len;
/* Strip blanks */
iptr=lpc_strip_blanks(input);
input_len = strlen(iptr);
/*
* Do nothing but release memory
* if only blanks are read
*/
if ( ! input_len )
{
free(input);
continue;
}
/*
* Only add to history if not already
* last item in it
*/
if ( strcmp(last_in_history, iptr) )
{
strncpy(last_in_history,iptr,sizeof(last_in_history));
last_in_history[sizeof(last_in_history)-1]='\0';
add_history(iptr);
}
linphonec_parse_command_line(&linphonec, iptr);
free(input);
}
return 0;
}
/*
* Parse command line switches
*
* Use globals:
*
* - int trace_level
* - char *logfile_name
* - char *configfile_name
* - char *sipAddr
*/
static int
linphonec_parse_cmdline(int argc, char **argv)
{
int arg_num=1;
while (arg_num < argc)
{
int old_arg_num = arg_num;
if (strncmp ("-d", argv[arg_num], 2) == 0)
{
arg_num++;
if (arg_num < argc)
trace_level = atoi (argv[arg_num]);
else
trace_level = 1;
}
else if (strncmp ("-l", argv[arg_num], 2) == 0)
{
arg_num++;
if (arg_num < argc)
logfile_name = argv[arg_num];
}
else if (strncmp ("-c", argv[arg_num], 2) == 0)
{
if ( ++arg_num >= argc ) print_usage(EXIT_FAILURE);
if (access(argv[arg_num],F_OK)!=0 )
{
fprintf (stderr,
"Cannot open config file %s.\n",
argv[arg_num]);
exit(EXIT_FAILURE);
}
snprintf(configfile_name, PATH_MAX, argv[arg_num]);
}
else if (strncmp ("-s", argv[arg_num], 2) == 0)
{
arg_num++;
if (arg_num < argc)
sipAddr = argv[arg_num];
}
else if (strncmp ("-a", argv[arg_num], 2) == 0)
{
auto_answer = TRUE;
}
else if (strncmp ("-V", argv[arg_num], 2) == 0)
{
video_enabled = TRUE;
}
else if ((strncmp ("-v", argv[arg_num], 2) == 0)
||
(strncmp
("--version", argv[arg_num],
strlen ("--version")) == 0))
{
printf ("version: " LINPHONE_VERSION "\n");
exit (EXIT_SUCCESS);
}
else if (old_arg_num == arg_num)
{
fprintf (stderr, "ERROR: bad arguments\n");
print_usage (EXIT_FAILURE);
}
arg_num++;
}
return 1;
}
/*
* Up to version 1.2.1 linphone used ~/.linphonec for
* CLI and ~/.gnome2/linphone for GUI as configuration file.
* In newer version both interfaces will use ~/.linphonerc.
*
* This function helps transparently migrating from one
* to the other layout using the following heuristic:
*
* IF new_config EXISTS => do nothing
* ELSE IF old_cli_config EXISTS => copy to new_config
* ELSE IF old_gui_config EXISTS => copy to new_config
*
* Returns:
* 0 if it did nothing
* 1 if it migrated successfully
* -1 on error
*/
static int
handle_configfile_migration()
{
char *old_cfg_gui;
char *old_cfg_cli;
char *new_cfg;
const char *home = getenv("HOME");
new_cfg = ms_strdup_printf("%s/.linphonerc", home);
/*
* If the *NEW* configuration already exists
* do nothing.
*/
if (access(new_cfg,F_OK)==0)
{
free(new_cfg);
return 0;
}
old_cfg_cli = ms_strdup_printf("%s/.linphonec", home);
/*
* If the *OLD* CLI configurations exist copy it to
* the new file and make it a symlink.
*/
if (access(old_cfg_cli, F_OK)==0)
{
if ( ! copy_file(old_cfg_cli, new_cfg) )
{
free(old_cfg_cli);
free(new_cfg);
return -1;
}
printf("%s copied to %s\n", old_cfg_cli, new_cfg);
free(old_cfg_cli);
free(new_cfg);
return 1;
}
free(old_cfg_cli);
old_cfg_gui = ms_strdup_printf("%s/.gnome2/linphone", home);
/*
* If the *OLD* GUI configurations exist copy it to
* the new file and make it a symlink.
*/
if (access(old_cfg_gui, F_OK)==0)
{
if ( ! copy_file(old_cfg_gui, new_cfg) )
{
exit(EXIT_FAILURE);
free(old_cfg_gui);
free(new_cfg);
return -1;
}
printf("%s copied to %s\n", old_cfg_gui, new_cfg);
free(old_cfg_gui);
free(new_cfg);
return 1;
}
free(old_cfg_gui);
free(new_cfg);
return 0;
}
/*
* Copy file "from" to file "to".
* Destination file is truncated if existing.
* Return 1 on success, 0 on error (printing an error).
*/
static int
copy_file(const char *from, const char *to)
{
char message[256];
FILE *in, *out;
char buf[256];
size_t n;
/* Open "from" file for reading */
in=fopen(from, "r");
if ( in == NULL )
{
snprintf(message, 255, "Can't open %s for reading: %s\n",
from, strerror(errno));
fprintf(stderr, message);
return 0;
}
/* Open "to" file for writing (will truncate existing files) */
out=fopen(to, "w");
if ( out == NULL )
{
snprintf(message, 255, "Can't open %s for writing: %s\n",
to, strerror(errno));
fprintf(stderr, message);
return 0;
}
/* Copy data from "in" to "out" */
while ( (n=fread(buf, 1, sizeof buf, in)) > 0 )
{
if ( ! fwrite(buf, 1, n, out) )
{
return 0;
}
}
fclose(in);
fclose(out);
return 1;
}
static char **
linephonec_readline_completion(const char *text, int start, int end)
{
char **matches = NULL;
/*
* Prevent readline from falling
* back to filename-completion
*/
rl_attempted_completion_over=1;
/*
* If this is the start of line we complete with commands
*/
if ( ! start )
{
return rl_completion_matches(text, linphonec_command_generator);
}
/*
* Otherwise, we should peek at command name
* or context to implement a smart completion.
* For example: "call .." could return
* friends' sip-uri as matches
*/
return matches;
}
/*
* Strip blanks from a string.
* Return a pointer into the provided string.
* Modifies input adding a NULL at first
* of trailing blanks.
*/
char *
lpc_strip_blanks(char *input)
{
char *iptr;
/* Find first non-blank */
while(*input && isspace(*input)) ++input;
/* Find last non-blank */
iptr=input+strlen(input);
if (iptr > input) {
while(isspace(*--iptr));
*(iptr+1)='\0';
}
return input;
}
/****************************************************************************
*
* $Log: linphonec.c,v $
* Revision 1.53 2007/02/13 21:31:01 smorlat
* added patch for general state.
* new doxygen for oRTP
* gtk-doc removed.
*
* Revision 1.52 2007/01/10 14:11:24 smorlat
* add --video to linphonec.
*
* Revision 1.51 2006/08/21 12:49:59 smorlat
* merged several little patches.
*
* Revision 1.50 2006/07/26 08:17:28 smorlat
* fix bugs.
*
* Revision 1.49 2006/07/17 18:45:00 smorlat
* support for several event queues in ortp.
* glib dependency removed from coreapi/ and console/
*
* Revision 1.48 2006/04/09 12:45:32 smorlat
* linphonec improvements.
*
* Revision 1.47 2006/04/04 08:04:34 smorlat
* switched to mediastreamer2, most bugs fixed.
*
* Revision 1.46 2006/03/16 17:17:40 smorlat
* fix various bugs.
*
* Revision 1.45 2006/03/12 21:48:31 smorlat
* gcc-2.95 compile error fixed.
* mediastreamer2 in progress
*
* Revision 1.44 2006/03/04 11:17:10 smorlat
* mediastreamer2 in progress.
*
* Revision 1.43 2006/02/13 09:50:50 strk
* fixed unused variable warning.
*
* Revision 1.42 2006/02/02 15:39:18 strk
* - Added 'friend list' and 'friend call' commands
* - Allowed for multiple DTFM send in a single line
* - Added status-specific callback (bare version)
*
* Revision 1.41 2006/02/02 13:30:05 strk
* - Padded vtable with missing callbacks
* (fixing a segfault on friends subscription)
* - Handled friends notify (bare version)
* - Handled text messages receive (bare version)
* - Printed message on subscription request (bare version)
*
* Revision 1.40 2006/01/26 09:48:05 strk
* Added limits.h include
*
* Revision 1.39 2006/01/26 02:11:01 strk
* Removed unused variables, fixed copyright date
*
* Revision 1.38 2006/01/25 18:33:02 strk
* Removed the -t swich, terminate_on_close made the default behaviour
*
* Revision 1.37 2006/01/20 14:12:34 strk
* Added linphonec_init() and linphonec_finish() functions.
* Handled SIGINT and SIGTERM to invoke linphonec_finish().
* Handling of auto-termination (-t) moved to linphonec_finish().
* Reworked main (input read) loop to not rely on 'terminate'
* and 'run' variable (dropped). configfile_name allocated on stack
* using PATH_MAX limit. Changed print_usage signature to allow
* for an exit_status specification.
*
* Revision 1.36 2006/01/18 09:25:32 strk
* Command completion inhibited in proxy addition and auth request prompts.
* Avoided use of readline's internal filename completion.
*
* Revision 1.35 2006/01/14 13:29:32 strk
* Reworked commands interface to use a table structure,
* used by command line parser and help function.
* Implemented first level of completion (commands).
* Added notification of invalid "answer" and "terminate"
* commands (no incoming call, no active call).
* Forbidden "call" intialization when a call is already active.
* Cleaned up all commands, adding more feedback and error checks.
*
* Revision 1.34 2006/01/13 13:00:29 strk
* Added linphonec.h. Code layout change (added comments, forward decl,
* globals on top, copyright notices and Logs). Handled out-of-memory
* condition on history management. Removed assumption on sizeof(char).
* Fixed bug in authentication prompt (introduced by readline).
* Added support for multiple authentication requests (up to MAX_PENDING_AUTH).
*
*
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