From 2c5a0a8b70a04c11b85498562d3e1361a4b7ad7d Mon Sep 17 00:00:00 2001
From: Benny Prijono <bennylp@teluu.com>
Date: Wed, 1 Mar 2006 19:31:18 +0000
Subject: Added pjsip-apps top level projects

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@254 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjsip-apps/src/pjsua/main.c | 944 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 944 insertions(+)
 create mode 100644 pjsip-apps/src/pjsua/main.c

(limited to 'pjsip-apps/src/pjsua/main.c')

diff --git a/pjsip-apps/src/pjsua/main.c b/pjsip-apps/src/pjsua/main.c
new file mode 100644
index 00000000..e1c584ae
--- /dev/null
+++ b/pjsip-apps/src/pjsua/main.c
@@ -0,0 +1,944 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * 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 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 <pjsua-lib/pjsua.h>
+#include <stdlib.h>		/* atoi */
+
+
+#define THIS_FILE	"main.c"
+
+/* Current dialog */
+static int current_acc;
+static int current_call = -1;
+
+
+/*
+ * Find next call.
+ */
+static pj_bool_t find_next_call(void)
+{
+    int i;
+
+    for (i=current_call+1; i<(int)pjsua.max_calls; ++i) {
+	if (pjsua.calls[i].inv != NULL) {
+	    current_call = i;
+	    return PJ_TRUE;
+	}
+    }
+
+    for (i=0; i<current_call; ++i) {
+	if (pjsua.calls[i].inv != NULL) {
+	    current_call = i;
+	    return PJ_TRUE;
+	}
+    }
+
+    current_call = -1;
+    return PJ_FALSE;
+}
+
+
+/*
+ * Find previous call.
+ */
+static pj_bool_t find_prev_call(void)
+{
+    int i;
+
+    for (i=current_call-1; i>=0; --i) {
+	if (pjsua.calls[i].inv != NULL) {
+	    current_call = i;
+	    return PJ_TRUE;
+	}
+    }
+
+    for (i=pjsua.max_calls-1; i>current_call; --i) {
+	if (pjsua.calls[i].inv != NULL) {
+	    current_call = i;
+	    return PJ_TRUE;
+	}
+    }
+
+    current_call = -1;
+    return PJ_FALSE;
+}
+
+
+
+/*
+ * Notify UI when invite state has changed.
+ */
+void pjsua_ui_inv_on_state_changed(int call_index, pjsip_event *e)
+{
+    pjsua_call *call = &pjsua.calls[call_index];
+
+    PJ_UNUSED_ARG(e);
+
+    PJ_LOG(3,(THIS_FILE, "Call %d state changed to %s", 
+	      call_index,
+	      pjsua_inv_state_names[call->inv->state]));
+
+    if (call->inv->state == PJSIP_INV_STATE_DISCONNECTED) {
+	call->inv = NULL;
+	if ((int)call->index == current_call) {
+	    find_next_call();
+	}
+
+    } else {
+
+	if (call && current_call==-1)
+	    current_call = call->index;
+
+    }
+}
+
+/**
+ * Notify UI when registration status has changed.
+ */
+void pjsua_ui_regc_on_state_changed(int code)
+{
+    PJ_UNUSED_ARG(code);
+
+    // Log already written.
+}
+
+
+/*
+ * Print buddy list.
+ */
+static void print_buddy_list(void)
+{
+    int i;
+
+    puts("Buddy list:");
+
+    if (pjsua.buddy_cnt == 0)
+	puts(" -none-");
+    else {
+	for (i=0; i<pjsua.buddy_cnt; ++i) {
+	    const char *status;
+
+	    if (pjsua.buddies[i].sub == NULL || 
+		pjsua.buddies[i].status.info_cnt==0)
+	    {
+		status = "   ?   ";
+	    } 
+	    else if (pjsua.buddies[i].status.info[0].basic_open)
+		status = " Online";
+	    else
+		status = "Offline";
+
+	    printf(" [%2d] <%s>  %s\n", 
+		    i+1, status, pjsua.buddies[i].uri.ptr);
+	}
+    }
+    puts("");
+}
+
+
+/*
+ * Print account status.
+ */
+static void print_acc_status(int acc_index)
+{
+    char reg_status[128];
+
+    if (pjsua.acc[acc_index].regc == NULL) {
+	pj_ansi_strcpy(reg_status, " -not registered to server-");
+
+    } else if (pjsua.acc[acc_index].reg_last_err != PJ_SUCCESS) {
+	pj_strerror(pjsua.acc[acc_index].reg_last_err, reg_status, sizeof(reg_status));
+
+    } else if (pjsua.acc[acc_index].reg_last_code>=200 && 
+	       pjsua.acc[acc_index].reg_last_code<=699) {
+
+	pjsip_regc_info info;
+
+	pjsip_regc_get_info(pjsua.acc[acc_index].regc, &info);
+
+	pj_snprintf(reg_status, sizeof(reg_status),
+		    "%s (%.*s;expires=%d)",
+		    pjsip_get_status_text(pjsua.acc[acc_index].reg_last_code)->ptr,
+		    (int)info.client_uri.slen,
+		    info.client_uri.ptr,
+		    info.next_reg);
+
+    } else {
+	pj_sprintf(reg_status, "in progress (%d)", 
+		   pjsua.acc[acc_index].reg_last_code);
+    }
+
+    printf("[%2d] Registration status: %s\n", acc_index, reg_status);
+    printf("     Online status: %s\n", 
+	   (pjsua.acc[acc_index].online_status ? "Online" : "Invisible"));
+}
+
+/*
+ * Show a bit of help.
+ */
+static void keystroke_help(void)
+{
+    int i;
+
+    printf(">>>>\n");
+
+    for (i=0; i<pjsua.acc_cnt; ++i)
+	print_acc_status(i);
+
+    print_buddy_list();
+    
+    //puts("Commands:");
+    puts("+=============================================================================+");
+    puts("|       Call Commands:         |      IM & Presence:      |   Misc:           |");
+    puts("|                              |                          |                   |");
+    puts("|  m  Make new call            |  i  Send IM              |  o  Send OPTIONS  |");
+    puts("|  M  Make multiple calls      |  s  Subscribe presence   | rr  (Re-)register |");
+    puts("|  a  Answer call              |  u  Unsubscribe presence | ru  Unregister    |");
+    puts("|  h  Hangup call              |  t  ToGgle Online status |  d  Dump status   |");
+    puts("|  H  Hold call                |                          | dc  Dump config   |");
+    puts("|  v  re-inVite (release hold) +--------------------------+-------------------+");
+    puts("|  ]  Select next dialog       |     Conference Command   |                   |");
+    puts("|  [  Select previous dialog   | cl  List ports           |                   |");
+    puts("|  x  Xfer call                | cc  Connect port         |                   |");
+    puts("|  #  Send DTMF string         | cd  Disconnect port      |                   |");
+    puts("+------------------------------+--------------------------+-------------------+");
+    puts("|  q  QUIT                                                                    |");
+    puts("+=============================================================================+");
+}
+
+
+/*
+ * Input simple string
+ */
+static pj_bool_t simple_input(const char *title, char *buf, pj_size_t len)
+{
+    char *p;
+
+    printf("%s (empty to cancel): ", title); fflush(stdout);
+    fgets(buf, len, stdin);
+
+    /* Remove trailing newlines. */
+    for (p=buf; ; ++p) {
+	if (*p=='\r' || *p=='\n') *p='\0';
+	else if (!*p) break;
+    }
+
+    if (!*buf)
+	return PJ_FALSE;
+    
+    return PJ_TRUE;
+}
+
+
+#define NO_NB	-2
+struct input_result
+{
+    int	  nb_result;
+    char *uri_result;
+};
+
+
+/*
+ * Input URL.
+ */
+static void ui_input_url(const char *title, char *buf, int len, 
+			 struct input_result *result)
+{
+    result->nb_result = NO_NB;
+    result->uri_result = NULL;
+
+    print_buddy_list();
+
+    printf("Choices:\n"
+	   "   0         For current dialog.\n"
+	   "  -1         All %d buddies in buddy list\n"
+	   "  [1 -%2d]    Select from buddy list\n"
+	   "  URL        An URL\n"
+	   "  <Enter>    Empty input (or 'q') to cancel\n"
+	   , pjsua.buddy_cnt, pjsua.buddy_cnt);
+    printf("%s: ", title);
+
+    fflush(stdout);
+    fgets(buf, len, stdin);
+    len = strlen(buf);
+
+    /* Left trim */
+    while (isspace(*buf)) {
+	++buf;
+	--len;
+    }
+
+    /* Remove trailing newlines */
+    while (len && (buf[len-1] == '\r' || buf[len-1] == '\n'))
+	buf[--len] = '\0';
+
+    if (len == 0 || buf[0]=='q')
+	return;
+
+    if (isdigit(*buf) || *buf=='-') {
+	
+	int i;
+	
+	if (*buf=='-')
+	    i = 1;
+	else
+	    i = 0;
+
+	for (; i<len; ++i) {
+	    if (!isdigit(buf[i])) {
+		puts("Invalid input");
+		return;
+	    }
+	}
+
+	result->nb_result = atoi(buf);
+
+	if (result->nb_result > 0 && result->nb_result <= (int)pjsua.buddy_cnt) {
+	    --result->nb_result;
+	    return;
+	}
+	if (result->nb_result == -1)
+	    return;
+
+	puts("Invalid input");
+	result->nb_result = NO_NB;
+	return;
+
+    } else {
+	pj_status_t status;
+
+	if ((status=pjsua_verify_sip_url(buf)) != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Invalid URL", status);
+	    return;
+	}
+
+	result->uri_result = buf;
+    }
+}
+
+static void conf_list(void)
+{
+    unsigned i, count;
+    pjmedia_conf_port_info info[PJSUA_MAX_CALLS];
+
+    printf("Conference ports:\n");
+
+    count = PJ_ARRAY_SIZE(info);
+    pjmedia_conf_get_ports_info(pjsua.mconf, &count, info);
+    for (i=0; i<count; ++i) {
+	char txlist[PJSUA_MAX_CALLS*4+10];
+	int j;
+	pjmedia_conf_port_info *port_info = &info[i];	
+	
+	txlist[0] = '\0';
+	for (j=0; j<pjsua.max_calls+PJSUA_CONF_MORE_PORTS; ++j) {
+	    char s[10];
+	    if (port_info->listener[j]) {
+		pj_sprintf(s, "#%d ", j);
+		pj_ansi_strcat(txlist, s);
+	    }
+	}
+	printf("Port #%02d %20.*s  transmitting to: %s\n", 
+	       port_info->slot, 
+	       (int)port_info->name.slen, 
+	       port_info->name.ptr,
+	       txlist);
+
+    }
+    puts("");
+}
+
+
+static void ui_console_main(void)
+{
+    char menuin[10];
+    char buf[128];
+    int i, count;
+    char *uri;
+    struct input_result result;
+
+    keystroke_help();
+
+    for (;;) {
+
+	printf(">>> ");
+	fflush(stdout);
+
+	fgets(menuin, sizeof(menuin), stdin);
+
+	switch (menuin[0]) {
+
+	case 'm':
+	    /* Make call! : */
+	    printf("(You currently have %d calls)\n", pjsua.call_cnt);
+	    
+	    ui_input_url("Make call", buf, sizeof(buf), &result);
+	    if (result.nb_result != NO_NB) {
+		if (result.nb_result == -1)
+		    puts("You can't do that with make call!");
+		else
+		    pjsua_make_call( current_acc, 
+				     pjsua.buddies[result.nb_result].uri.ptr, 
+				     NULL);
+	    } else if (result.uri_result)
+		pjsua_make_call( current_acc, result.uri_result, NULL);
+	    
+	    break;
+
+	case 'M':
+	    /* Make multiple calls! : */
+	    printf("(You currently have %d calls)\n", pjsua.call_cnt);
+	    
+	    ui_input_url("Make call", buf, sizeof(buf), &result);
+	    if (result.nb_result != NO_NB) {
+		if (result.nb_result == -1) {
+		    puts("You can't do that with make call!");
+		    continue;
+		}
+		uri = pjsua.buddies[result.nb_result].uri.ptr;
+	    } else {
+		uri =  result.uri_result;
+	    }
+
+	    if (!simple_input("Number of calls", menuin, sizeof(menuin)))
+		continue;
+
+	    count = atoi(menuin);
+	    if (count < 1)
+		continue;
+
+	    for (i=0; i<atoi(menuin); ++i) {
+		pj_status_t status;
+
+		status = pjsua_make_call(current_acc, uri, NULL);
+		if (status != PJ_SUCCESS)
+		    break;
+	    }
+	    break;
+
+	case 'a':
+
+	    if (current_call == -1 || 
+		pjsua.calls[current_call].inv->role != PJSIP_ROLE_UAS ||
+		pjsua.calls[current_call].inv->state >= PJSIP_INV_STATE_CONNECTING)
+	    {
+		puts("No pending incoming call");
+		fflush(stdout);
+		continue;
+
+	    } else {
+		pj_status_t status;
+		pjsip_tx_data *tdata;
+
+		if (!simple_input("Answer with code (100-699)", buf, sizeof(buf)))
+		    continue;
+		
+		if (atoi(buf) < 100)
+		    continue;
+
+		/*
+		 * Must check again!
+		 * Call may have been disconnected while we're waiting for 
+		 * keyboard input.
+		 */
+		if (current_call == -1) {
+		    puts("Call has been disconnected");
+		    fflush(stdout);
+		    continue;
+		}
+
+		status = pjsip_inv_answer(pjsua.calls[current_call].inv, 
+					  atoi(buf), 
+					  NULL, NULL, &tdata);
+		if (status == PJ_SUCCESS)
+		    status = pjsip_inv_send_msg(pjsua.calls[current_call].inv,
+						tdata, NULL);
+
+		if (status != PJ_SUCCESS)
+		    pjsua_perror(THIS_FILE, "Unable to create/send response", 
+				 status);
+	    }
+
+	    break;
+
+
+	case 'h':
+
+	    if (current_call == -1) {
+		puts("No current call");
+		fflush(stdout);
+		continue;
+
+	    } else {
+		pjsua_call_hangup(current_call, PJSIP_SC_DECLINE);
+	    }
+	    break;
+
+	case ']':
+	case '[':
+	    /*
+	     * Cycle next/prev dialog.
+	     */
+	    if (menuin[0] == ']') {
+		find_next_call();
+
+	    } else {
+		find_prev_call();
+	    }
+
+	    if (current_call != -1) {
+		char url[PJSIP_MAX_URL_SIZE];
+		int len;
+		const pjsip_uri *u;
+
+		u = pjsua.calls[current_call].inv->dlg->remote.info->uri;
+		len = pjsip_uri_print(0, u, url, sizeof(url)-1);
+		if (len < 1) {
+		    pj_ansi_strcpy(url, "<uri is too long>");
+		} else {
+		    url[len] = '\0';
+		}
+
+		PJ_LOG(3,(THIS_FILE,"Current dialog: %s", url));
+
+	    } else {
+		PJ_LOG(3,(THIS_FILE,"No current dialog"));
+	    }
+	    break;
+
+	case 'H':
+	    /*
+	     * Hold call.
+	     */
+	    if (current_call != -1) {
+		
+		pjsua_call_set_hold(current_call);
+
+	    } else {
+		PJ_LOG(3,(THIS_FILE, "No current call"));
+	    }
+	    break;
+
+	case 'v':
+	    /*
+	     * Send re-INVITE (to release hold, etc).
+	     */
+	    if (current_call != -1) {
+		
+		pjsua_call_reinvite(current_call);
+
+	    } else {
+		PJ_LOG(3,(THIS_FILE, "No current call"));
+	    }
+	    break;
+
+	case 'x':
+	    /*
+	     * Transfer call.
+	     */
+	    if (current_call == -1) {
+		
+		PJ_LOG(3,(THIS_FILE, "No current call"));
+
+	    } else {
+		int call = current_call;
+
+		ui_input_url("Transfer to URL", buf, sizeof(buf), &result);
+
+		/* Check if call is still there. */
+
+		if (call != current_call) {
+		    puts("Call has been disconnected");
+		    continue;
+		}
+
+		if (result.nb_result != NO_NB) {
+		    if (result.nb_result == -1) 
+			puts("You can't do that with transfer call!");
+		    else
+			pjsua_call_xfer( current_call,
+					 pjsua.buddies[result.nb_result].uri.ptr);
+
+		} else if (result.uri_result) {
+		    pjsua_call_xfer( current_call, result.uri_result);
+		}
+	    }
+	    break;
+
+	case '#':
+	    /*
+	     * Send DTMF strings.
+	     */
+	    if (current_call == -1) {
+		
+		PJ_LOG(3,(THIS_FILE, "No current call"));
+
+	    } else if (pjsua.calls[current_call].session == NULL) {
+
+		PJ_LOG(3,(THIS_FILE, "Media is not established yet!"));
+
+	    } else {
+		pj_str_t digits;
+		int call = current_call;
+		pj_status_t status;
+
+		if (!simple_input("DTMF strings to send (0-9*#A-B)", buf, 
+				  sizeof(buf)))
+		{
+			break;
+		}
+
+		if (call != current_call) {
+		    puts("Call has been disconnected");
+		    continue;
+		}
+
+		digits = pj_str(buf);
+		status = pjmedia_session_dial_dtmf(pjsua.calls[current_call].session, 0, 
+						   &digits);
+		if (status != PJ_SUCCESS) {
+		    pjsua_perror(THIS_FILE, "Unable to send DTMF", status);
+		} else {
+		    puts("DTMF digits enqueued for transmission");
+		}
+	    }
+	    break;
+
+	case 's':
+	case 'u':
+	    /*
+	     * Subscribe/unsubscribe presence.
+	     */
+	    ui_input_url("(un)Subscribe presence of", buf, sizeof(buf), &result);
+	    if (result.nb_result != NO_NB) {
+		if (result.nb_result == -1) {
+		    int i;
+		    for (i=0; i<pjsua.buddy_cnt; ++i)
+			pjsua.buddies[i].monitor = (menuin[0]=='s');
+		} else {
+		    pjsua.buddies[result.nb_result].monitor = (menuin[0]=='s');
+		}
+
+		pjsua_pres_refresh(current_acc);
+
+	    } else if (result.uri_result) {
+		puts("Sorry, can only subscribe to buddy's presence, "
+		     "not arbitrary URL (for now)");
+	    }
+
+	    break;
+
+	case 'r':
+	    switch (menuin[1]) {
+	    case 'r':
+		/*
+		 * Re-Register.
+		 */
+		pjsua_regc_update(current_acc, PJ_TRUE);
+		break;
+	    case 'u':
+		/*
+		 * Unregister
+		 */
+		pjsua_regc_update(current_acc, PJ_FALSE);
+		break;
+	    }
+	    break;
+	    
+	case 't':
+	    pjsua.acc[current_acc].online_status = 
+		!pjsua.acc[current_acc].online_status;
+	    pjsua_pres_refresh(current_acc);
+	    break;
+
+	case 'c':
+	    switch (menuin[1]) {
+	    case 'l':
+		conf_list();
+		break;
+	    case 'c':
+	    case 'd':
+		{
+		    char src_port[10], dst_port[10];
+		    pj_status_t status;
+		    const char *src_title, *dst_title;
+
+		    conf_list();
+
+		    src_title = (menuin[1]=='c'?
+				 "Connect src port #":
+				 "Disconnect src port #");
+		    dst_title = (menuin[1]=='c'?
+				 "To dst port #":
+				 "From dst port #");
+
+		    if (!simple_input(src_title, src_port, sizeof(src_port)))
+			break;
+
+		    if (!simple_input(dst_title, dst_port, sizeof(dst_port)))
+			break;
+
+		    if (menuin[1]=='c') {
+			status = pjmedia_conf_connect_port(pjsua.mconf, 
+							   atoi(src_port), 
+							   atoi(dst_port));
+		    } else {
+			status = pjmedia_conf_disconnect_port(pjsua.mconf, 
+							      atoi(src_port), 
+							      atoi(dst_port));
+		    }
+		    if (status == PJ_SUCCESS) {
+			puts("Success");
+		    } else {
+			puts("ERROR!!");
+		    }
+		}
+		break;
+	    }
+	    break;
+
+	case 'd':
+	    if (menuin[1] == 'c') {
+		char settings[2000];
+		int len;
+
+		len = pjsua_dump_settings(settings, sizeof(settings));
+		if (len < 1)
+		    PJ_LOG(3,(THIS_FILE, "Error: not enough buffer"));
+		else
+		    PJ_LOG(3,(THIS_FILE, 
+			      "Dumping configuration (%d bytes):\n%s\n",
+			      len, settings));
+	    } else {
+		pjsua_dump();
+	    }
+	    break;
+
+	case 'q':
+	    goto on_exit;
+
+	default:
+	    keystroke_help();
+	    break;
+	}
+    }
+
+on_exit:
+    ;
+}
+
+
+/*****************************************************************************
+ * This is a very simple PJSIP module, whose sole purpose is to display
+ * incoming and outgoing messages to log. This module will have priority
+ * higher than transport layer, which means:
+ *
+ *  - incoming messages will come to this module first before reaching
+ *    transaction layer.
+ *
+ *  - outgoing messages will come to this module last, after the message
+ *    has been 'printed' to contiguous buffer by transport layer and
+ *    appropriate transport instance has been decided for this message.
+ *
+ */
+
+/* Notification on incoming messages */
+static pj_bool_t console_on_rx_msg(pjsip_rx_data *rdata)
+{
+    PJ_LOG(4,(THIS_FILE, "RX %d bytes %s from %s:%d:\n"
+			 "%s\n"
+			 "--end msg--",
+			 rdata->msg_info.len,
+			 pjsip_rx_data_get_info(rdata),
+			 rdata->pkt_info.src_name,
+			 rdata->pkt_info.src_port,
+			 rdata->msg_info.msg_buf));
+    
+    /* Always return false, otherwise messages will not get processed! */
+    return PJ_FALSE;
+}
+
+/* Notification on outgoing messages */
+static pj_status_t console_on_tx_msg(pjsip_tx_data *tdata)
+{
+    
+    /* Important note:
+     *	tp_info field is only valid after outgoing messages has passed
+     *	transport layer. So don't try to access tp_info when the module
+     *	has lower priority than transport layer.
+     */
+
+    PJ_LOG(4,(THIS_FILE, "TX %d bytes %s to %s:%d:\n"
+			 "%s\n"
+			 "--end msg--",
+			 (tdata->buf.cur - tdata->buf.start),
+			 pjsip_tx_data_get_info(tdata),
+			 tdata->tp_info.dst_name,
+			 tdata->tp_info.dst_port,
+			 tdata->buf.start));
+
+    /* Always return success, otherwise message will not get sent! */
+    return PJ_SUCCESS;
+}
+
+/* The module instance. */
+static pjsip_module console_msg_logger = 
+{
+    NULL, NULL,				/* prev, next.		*/
+    { "mod-pjsua-log", 13 },		/* Name.		*/
+    -1,					/* Id			*/
+    PJSIP_MOD_PRIORITY_TRANSPORT_LAYER-1,/* Priority	        */
+    NULL,				/* load()		*/
+    NULL,				/* start()		*/
+    NULL,				/* stop()		*/
+    NULL,				/* unload()		*/
+    &console_on_rx_msg,			/* on_rx_request()	*/
+    &console_on_rx_msg,			/* on_rx_response()	*/
+    &console_on_tx_msg,			/* on_tx_request.	*/
+    &console_on_tx_msg,			/* on_tx_response()	*/
+    NULL,				/* on_tsx_state()	*/
+
+};
+
+
+
+/*****************************************************************************
+ * Console application custom logging:
+ */
+
+
+static FILE *log_file;
+
+
+static void app_log_writer(int level, const char *buffer, int len)
+{
+    /* Write to both stdout and file. */
+
+    if (level <= pjsua.app_log_level)
+	pj_log_write(level, buffer, len);
+
+    if (log_file) {
+	fwrite(buffer, len, 1, log_file);
+	fflush(log_file);
+    }
+}
+
+
+void app_logging_init(void)
+{
+    /* Redirect log function to ours */
+
+    pj_log_set_log_func( &app_log_writer );
+
+    /* If output log file is desired, create the file: */
+
+    if (pjsua.log_filename)
+	log_file = fopen(pjsua.log_filename, "wt");
+}
+
+
+void app_logging_shutdown(void)
+{
+    /* Close logging file, if any: */
+
+    if (log_file) {
+	fclose(log_file);
+	log_file = NULL;
+    }
+}
+
+/*****************************************************************************
+ * Error display:
+ */
+
+/*
+ * Display error message for the specified error code.
+ */
+void pjsua_perror(const char *sender, const char *title, 
+		  pj_status_t status)
+{
+    char errmsg[PJ_ERR_MSG_SIZE];
+
+    pj_strerror(status, errmsg, sizeof(errmsg));
+
+    PJ_LOG(1,(sender, "%s: %s [code=%d]", title, errmsg, status));
+}
+
+
+
+
+/*****************************************************************************
+ * main():
+ */
+int main(int argc, char *argv[])
+{
+
+    /* Init default settings. */
+    pjsua_default();
+
+
+    /* Initialize pjsua (to create pool etc).
+     */
+    if (pjsua_init() != PJ_SUCCESS)
+	return 1;
+
+
+    /* Parse command line arguments: */
+    if (pjsua_parse_args(argc, argv) != PJ_SUCCESS)
+	return 1;
+
+
+    /* Init logging: */
+    app_logging_init();
+
+
+    /* Register message logger to print incoming and outgoing
+     * messages.
+     */
+    pjsip_endpt_register_module(pjsua.endpt, &console_msg_logger);
+
+
+    /* Start pjsua! */
+    if (pjsua_start() != PJ_SUCCESS) {
+
+	pjsua_destroy();
+	return 1;
+    }
+
+
+    /* Sleep for a while, let any messages get printed to console: */
+    pj_thread_sleep(500);
+
+
+    /* Start UI console main loop: */
+    ui_console_main();
+
+
+    /* Destroy pjsua: */
+    pjsua_destroy();
+
+
+    /* Close logging: */
+    app_logging_shutdown();
+
+
+    /* Exit... */
+
+    return 0;
+}
+
-- 
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