Version 0.1.10 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@398 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 498 insertions, 0 deletions

diff --git a/res/res_parking.c b/res/res_parking.c
new file mode 100755
index 000000000..034efa0f1
--- /dev/null
+++ b/res/res_parking.c
@@ -0,0 +1,498 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Routines implementing call parking
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/options.h>
+#include <asterisk/module.h>
+#include <asterisk/translate.h>
+#include <asterisk/say.h>
+#include <asterisk/channel_pvt.h>
+#include <asterisk/parking.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <netinet/in.h>
+
+#include <pthread.h>
+
+static char *parkedcall = "ParkedCall";
+
+/* No more than 45 seconds parked before you do something with them */
+static int parkingtime = 45000;
+
+/* Context for which parking is made accessible */
+static char parking_con[AST_MAX_EXTENSION] = "parkedcalls";
+
+/* Extension you type to park the call */
+static char parking_ext[AST_MAX_EXTENSION] = "700";
+
+/* First available extension for parking */
+static int parking_start = 701;
+
+/* Last available extension for parking */
+static int parking_stop = 750;
+
+/* Registrar for operations */
+static char *registrar = "res_parking";
+
+static char *synopsis = "Answer a parked call";
+
+static char *descrip = "ParkedCall(exten):"
+"Used to connect to a parked call.  This Application is always\n"
+"registered internally and does not need to be explicitly added\n"
+"into the dialplan, although you should include the 'parkedcalls'\n"
+"context.\n";
+
+struct parkeduser {
+	struct ast_channel *chan;
+	struct timeval start;
+	int parkingnum;
+	/* Where to go if our parking time expires */
+	char context[AST_MAX_EXTENSION];
+	char exten[AST_MAX_EXTENSION];
+	int priority;
+	struct parkeduser *next;
+};
+
+static struct parkeduser *parkinglot;
+
+static pthread_mutex_t parking_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static pthread_t parking_thread;
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+char *ast_parking_ext(void)
+{
+	return parking_ext;
+}
+
+int ast_park_call(struct ast_channel *chan, struct ast_channel *peer)
+{
+	/* We put the user in the parking list, then wake up the parking thread to be sure it looks
+	   after these channels too */
+	struct parkeduser *pu, *cur;
+	int x;
+	pu = malloc(sizeof(struct parkeduser));
+	if (pu) {
+		ast_pthread_mutex_lock(&parking_lock);
+		for (x=parking_start;x<=parking_stop;x++) {
+			cur = parkinglot;
+			while(cur) {
+				if (cur->parkingnum == x) 
+					break;
+				cur = cur->next;
+			}
+			if (!cur)
+				break;
+		}
+		if (x <= parking_stop) {
+			pu->chan = chan;
+			gettimeofday(&pu->start, NULL);
+			pu->parkingnum = x;
+			/* Remember what had been dialed, so that if the parking
+			   expires, we try to come back to the same place */
+			strncpy(pu->context, chan->context, sizeof(pu->context)-1);
+			strncpy(pu->exten, chan->exten, sizeof(pu->exten)-1);
+			pu->priority = chan->priority;
+			pu->next = parkinglot;
+			parkinglot = pu;
+			ast_pthread_mutex_unlock(&parking_lock);
+			/* Wake up the (presumably select()ing) thread */
+			pthread_kill(parking_thread, SIGURG);
+			if (option_verbose > 1) 
+				ast_verbose(VERBOSE_PREFIX_2 "Parked %s on %d\n", pu->chan->name, pu->parkingnum);
+			ast_say_digits(peer, pu->parkingnum, "", peer->language);
+			return 0;
+		} else {
+			ast_log(LOG_WARNING, "No more parking spaces\n");
+			free(pu);
+			ast_pthread_mutex_unlock(&parking_lock);
+			return -1;
+		}
+	} else {
+		ast_log(LOG_WARNING, "Out of memory\n");
+		return -1;
+	}
+	return 0;
+}
+
+int ast_masq_park_call(struct ast_channel *rchan, struct ast_channel *peer)
+{
+	struct ast_channel *chan;
+	struct ast_frame *f;
+	/* Make a new, fake channel that we'll use to masquerade in the real one */
+	chan = ast_channel_alloc();
+	if (chan) {
+		/* Let us keep track of the channel name */
+		snprintf(chan->name, sizeof (chan->name), "Parked/%s",rchan->name);
+		/* Make formats okay */
+		chan->readformat = rchan->readformat;
+		chan->writeformat = rchan->writeformat;
+		ast_channel_masquerade(chan, rchan);
+		/* Setup the extensions and such */
+		strncpy(chan->context, rchan->context, sizeof(chan->context) - 1);
+		strncpy(chan->exten, rchan->exten, sizeof(chan->exten) - 1);
+		chan->priority = rchan->priority;
+		/* Make the masq execute */
+		f = ast_read(chan);
+		if (f)
+			ast_frfree(f);
+		ast_park_call(chan, peer);
+	} else {
+		ast_log(LOG_WARNING, "Unable to create parked channel\n");
+		return -1;
+	}
+	return 0;
+}
+
+int ast_bridge_call(struct ast_channel *chan, struct ast_channel *peer, int allowredirect)
+{
+	/* Copy voice back and forth between the two channels.  Give the peer
+	   the ability to transfer calls with '#<extension' syntax. */
+	int len;
+	struct ast_frame *f;
+	struct ast_channel *who;
+	char newext[256], *ptr;
+	int res;
+	struct ast_option_header *aoh;
+	/* Answer if need be */
+	if (chan->state != AST_STATE_UP) {
+		if (ast_answer(chan))
+			return -1;
+	}
+	peer->appl = "Bridged Call";
+	peer->data = chan->name;
+	for (;;) {
+		res = ast_channel_bridge(chan, peer, allowredirect ? AST_BRIDGE_DTMF_CHANNEL_1 : 0, &f, &who);
+		if (res < 0) {
+			ast_log(LOG_WARNING, "Bridge failed on channels %s and %s\n", chan->name, peer->name);
+			return -1;
+		}
+		
+		if (!f || ((f->frametype == AST_FRAME_CONTROL) && ((f->subclass == AST_CONTROL_HANGUP) || (f->subclass == AST_CONTROL_BUSY) || 
+			(f->subclass == AST_CONTROL_CONGESTION)))) {
+				res = -1;
+				break;
+		}
+		if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RINGING)) {
+			if (who == chan)
+				ast_indicate(peer, AST_CONTROL_RINGING);
+			else
+				ast_indicate(chan, AST_CONTROL_RINGING);
+		}
+		if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_OPTION)) {
+			aoh = f->data;
+			/* Forward option Requests */
+			if (aoh && (aoh->flag == AST_OPTION_FLAG_REQUEST)) {
+				if (who == chan)
+					ast_channel_setoption(peer, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
+				else
+					ast_channel_setoption(chan, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
+			}
+		}
+		if ((f->frametype == AST_FRAME_DTMF) && (who == peer) && allowredirect &&
+		     (f->subclass == '#')) {
+				memset(newext, 0, sizeof(newext));
+				ptr = newext;
+					/* Transfer */
+				if ((res=ast_streamfile(peer, "pbx-transfer", chan->language)))
+					break;
+				if ((res=ast_waitstream(peer, AST_DIGIT_ANY)) < 0)
+					break;
+				ast_stopstream(peer);
+				if (res > 0) {
+					/* If they've typed a digit already, handle it */
+					newext[0] = res;
+					ptr++;
+					len --;
+				}
+				res = 0;
+				while(strlen(newext) < sizeof(newext - 1)) {
+					res = ast_waitfordigit(peer, 3000);
+					if (res < 1)
+						break;
+					*(ptr++) = res;
+					if (!ast_canmatch_extension(peer, peer->context, newext, 1, peer->callerid) ||
+						ast_exists_extension(peer, peer->context, newext, 1, peer->callerid)) {
+						res = 0;
+						break;
+					}
+				}
+				if (res)
+					break;
+				if (!strcmp(newext, ast_parking_ext())) {
+					if (!ast_park_call(chan, peer)) {
+						/* We return non-zero, but tell the PBX not to hang the channel when
+						   the thread dies -- We have to be careful now though.  We are responsible for 
+						   hanging up the channel, else it will never be hung up! */
+						res=AST_PBX_KEEPALIVE;
+						break;
+					} else {
+						ast_log(LOG_WARNING, "Unable to park call %s\n", chan->name);
+					}
+					/* XXX Maybe we should have another message here instead of invalid extension XXX */
+				} else if (ast_exists_extension(chan, peer->context, newext, 1, peer->callerid)) {
+					/* Set the channel's new extension, since it exists, using peer context */
+					strncpy(chan->exten, newext, sizeof(chan->exten)-1);
+					strncpy(chan->context, peer->context, sizeof(chan->context)-1);
+					chan->priority = 0;
+					ast_frfree(f);
+					if (option_verbose > 2) 
+						ast_verbose(VERBOSE_PREFIX_3 "Transferring %s to '%s' (context %s) priority 1\n", chan->name, chan->exten, chan->context);
+					res=0;
+					break;
+				} else {
+					if (option_verbose > 2)	
+						ast_verbose(VERBOSE_PREFIX_3 "Unable to find extension '%s' in context %s\n", newext, peer->context);
+				}
+				res = ast_streamfile(peer, "pbx-invalid", chan->language);
+				if (res)
+					break;
+				res = ast_waitstream(peer, AST_DIGIT_ANY);
+				ast_stopstream(peer);
+				res = 0;
+			} else {
+            if (f && (f->frametype == AST_FRAME_DTMF)) {
+                  if (who == peer)
+                        ast_write(chan, f);
+                  else
+                        ast_write(peer, f);
+            }            
+#if 1
+				ast_log(LOG_DEBUG, "Read from %s (%d,%d)\n", who->name, f->frametype, f->subclass);
+#endif
+			}
+         if (f)
+               ast_frfree(f);
+	}
+	return res;
+}
+
+static void *do_parking_thread(void *ignore)
+{
+	int ms, tms, max;
+	struct parkeduser *pu, *pl, *pt = NULL;
+	struct timeval tv;
+	struct ast_frame *f;
+	int x;
+	fd_set rfds, efds;
+	fd_set nrfds, nefds;
+	FD_ZERO(&rfds);
+	FD_ZERO(&efds);
+	for (;;) {
+		ms = -1;
+		max = -1;
+		ast_pthread_mutex_lock(&parking_lock);
+		pl = NULL;
+		pu = parkinglot;
+		gettimeofday(&tv, NULL);
+		FD_ZERO(&nrfds);
+		FD_ZERO(&nefds);
+		while(pu) {
+			tms = (tv.tv_sec - pu->start.tv_sec) * 1000 + (tv.tv_usec - pu->start.tv_usec) / 1000;
+			if (tms > parkingtime) {
+				/* They've been waiting too long, send them back to where they came.  Theoretically they
+				   should have their original extensions and such, but we copy to be on the safe side */
+				strncpy(pu->chan->exten, pu->exten, sizeof(pu->chan->exten)-1);
+				strncpy(pu->chan->context, pu->context, sizeof(pu->chan->context)-1);
+				pu->chan->priority = pu->priority;
+				/* Start up the PBX, or hang them up */
+				if (ast_pbx_start(pu->chan))  {
+					ast_log(LOG_WARNING, "Unable to restart the PBX for user on '%s', hanging them up...\n", pu->chan->name);
+					ast_hangup(pu->chan);
+				}
+				/* And take them out of the parking lot */
+				if (pl) 
+					pl->next = pu->next;
+				else
+					parkinglot = pu->next;
+				pt = pu;
+				pu = pu->next;
+				free(pt);
+			} else {
+				for (x=0;x<AST_MAX_FDS;x++) {
+					if ((pu->chan->fds[x] > -1) && (FD_ISSET(pu->chan->fds[x], &rfds) || FD_ISSET(pu->chan->fds[x], &efds))) {
+							if (FD_ISSET(pu->chan->fds[x], &efds))
+								pu->chan->exception = 1;
+							pu->chan->fdno = x;
+							/* See if they need servicing */
+							f = ast_read(pu->chan);
+							if (!f || ((f->frametype == AST_FRAME_CONTROL) && (f->subclass ==  AST_CONTROL_HANGUP))) {
+							/* There's a problem, hang them up*/
+							if (option_verbose > 1) 
+								ast_verbose(VERBOSE_PREFIX_2 "%s got tired of being parked\n", pu->chan->name);
+							ast_hangup(pu->chan);
+							/* And take them out of the parking lot */
+							if (pl) 
+								pl->next = pu->next;
+							else
+								parkinglot = pu->next;
+							pt = pu;
+							pu = pu->next;
+							free(pt);
+							break;
+						} else {
+							/* XXX Maybe we could do something with packets, like dial "0" for operator or something XXX */
+							ast_frfree(f);
+							goto std;	/* XXX Ick: jumping into an else statement??? XXX */
+						}
+					}
+				}
+				if (x >= AST_MAX_FDS) {
+std:					for (x=0;x<AST_MAX_FDS;x++) {
+						/* Keep this one for next one */
+						if (pu->chan->fds[x] > -1) {
+							FD_SET(pu->chan->fds[x], &nrfds);
+							FD_SET(pu->chan->fds[x], &nefds);
+							if (pu->chan->fds[x] > max)
+								max = pu->chan->fds[x];
+						}
+					}
+					/* Keep track of our longest wait */
+					if ((tms < ms) || (ms < 0))
+						ms = tms;
+					pl = pu;
+					pu = pu->next;
+				}
+			}
+		}
+		ast_pthread_mutex_unlock(&parking_lock);
+		rfds = nrfds;
+		efds = nefds;
+		tv.tv_sec = ms / 1000;
+		tv.tv_usec = (ms % 1000) * 1000;
+		/* Wait for something to happen */
+		select(max + 1, &rfds, NULL, &efds, (ms > -1) ? &tv : NULL);
+		pthread_testcancel();
+	}
+	return NULL;	/* Never reached */
+}
+
+static int park_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+	struct ast_channel *peer=NULL;
+	struct parkeduser *pu, *pl=NULL;
+	int park;
+	if (!data) {
+		ast_log(LOG_WARNING, "Park requires an argument (extension number)\n");
+		return -1;
+	}
+	LOCAL_USER_ADD(u);
+	park = atoi((char *)data);
+	ast_pthread_mutex_lock(&parking_lock);
+	pu = parkinglot;
+	while(pu) {
+		if (pu->parkingnum == park) {
+			if (pl)
+				pl->next = pu->next;
+			else
+				parkinglot = pu->next;
+			break;
+		}
+		pu = pu->next;
+	}
+	ast_pthread_mutex_unlock(&parking_lock);
+	if (pu) {
+		peer = pu->chan;
+		free(pu);
+	}
+	if (peer) {
+		res = ast_channel_make_compatible(chan, peer);
+		if (res < 0) {
+			ast_log(LOG_WARNING, "Could not make channels %s and %s compatible for bridge\n", chan->name, peer->name);
+			ast_hangup(peer);
+			return -1;
+		}
+		/* This runs sorta backwards, since we give the incoming channel control, as if it
+		   were the person called. */
+		if (option_verbose > 2) 
+			ast_verbose(VERBOSE_PREFIX_3 "Channel %s connected to parked call %d\n", chan->name, park);
+		res = ast_bridge_call(peer, chan, 1);
+		/* Simulate the PBX hanging up */
+		if (res != AST_PBX_KEEPALIVE)
+			ast_hangup(peer);
+		return -1;
+	} else {
+		/* XXX Play a message XXX */
+		if (option_verbose > 2) 
+			ast_verbose(VERBOSE_PREFIX_3 "Channel %s tried to talk to non-existant parked call %d\n", chan->name, park);
+		res = -1;
+	}
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+int load_module(void)
+{
+	int res;
+	int x;
+	struct ast_context *con;
+	char exten[AST_MAX_EXTENSION];
+	con = ast_context_find(parking_con);
+	if (!con) {
+		con = ast_context_create(parking_con, registrar);
+		if (!con) {
+			ast_log(LOG_ERROR, "Parking context '%s' does not exist and unable to create\n", parking_con);
+			return -1;
+		}
+	}
+	for(x=parking_start; x<=parking_stop;x++) {
+		snprintf(exten, sizeof(exten), "%d", x);
+		ast_add_extension2(con, 1, exten, 1, NULL, parkedcall, strdup(exten), free, registrar);
+	}
+	pthread_create(&parking_thread, NULL, do_parking_thread, NULL);
+	res = ast_register_application(parkedcall, park_exec, synopsis, descrip);
+	return res;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(parkedcall);
+}
+
+char *description(void)
+{
+	return "Call Parking Resource";
+}
+
+int usecount(void)
+{
+	/* Never allow parking to be unloaded because it will
+	   unresolve needed symbols in the dialer */
+#if 0
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+#else
+	return 1;
+#endif
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}