Merged revisions 72585 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r72585 | crichter | 2007-06-29 15:08:26 +0200 (Fr, 29 Jun 2007) | 1 line

check if the bchannel stack id is already used, if so don't use it a second time. Also added a release_chan lock, so that the same chan_list object cannot be freed twice. chan_misdn does not crash anymore on heavy load with these changes.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@72852 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_misdn.c

@@ -110,6 +110,10 @@ of data. */
 int misdn_jb_empty(struct misdn_jb *jb, char *data, int len);
 
 
+/* BEGIN: chan_misdn.h */
+
+ast_mutex_t release_lock;
+
 enum misdn_chan_state {
 	MISDN_NOTHING=0,	/*!< at beginning */
 	MISDN_WAITING4DIGS, /*!<  when waiting for infos */
@@ -2424,11 +2428,13 @@ static int misdn_hangup(struct ast_channel *ast)
 		/* between request and call */
 		ast_log(LOG_DEBUG, "State Reserved (or nothing) => chanIsAvail\n");
 		MISDN_ASTERISK_TECH_PVT(ast)=NULL;
-		
+	
+		ast_mutex_lock(&release_lock);
 		cl_dequeue_chan(&cl_te, p);
 		close(p->pipe[0]);
 		close(p->pipe[1]);
 		free(p);
+		ast_mutex_unlock(&release_lock);
 		
 		if (bc)
 			misdn_lib_release(bc);
@@ -3516,10 +3522,13 @@ static void hangup_chan(struct chan_list *ch)
 /** Isdn asks us to release channel, pendant to misdn_hangup **/
 static void release_chan(struct misdn_bchannel *bc) {
 	struct ast_channel *ast=NULL;
+
+	ast_mutex_lock(&release_lock);
 	{
 		struct chan_list *ch=find_chan_by_bc(cl_te, bc);
 		if (!ch)  {
 			chan_misdn_log(1, bc->port, "release_chan: Ch not found!\n");
+			ast_mutex_unlock(&release_lock);
 			return;
 		}
 		
@@ -3578,6 +3587,8 @@ static void release_chan(struct misdn_bchannel *bc) {
 			/* chan is already cleaned, so exiting  */
 		}
 	}
+
+	ast_mutex_unlock(&release_lock);
 }
 /*** release end **/
 
@@ -4917,6 +4928,7 @@ static int load_module(void)
 	}
 	
 	ast_mutex_init(&cl_te_lock);
+	ast_mutex_init(&release_lock);
 
 	misdn_cfg_update_ptp();
 	misdn_cfg_get_ports_string(ports);

channels/misdn/isdn_lib.c

@@ -41,7 +41,7 @@ int misdn_lib_port_is_pri(int port)
 	return -1;
 }
 
-void make_dummy(struct misdn_bchannel *dummybc, int port, int l3id, int nt, int channel) 
+static void make_dummy(struct misdn_bchannel *dummybc, int port, int l3id, int nt, int channel) 
 {
 	memset (dummybc,0,sizeof(struct misdn_bchannel));
 	dummybc->port=port;
@@ -964,7 +964,7 @@ int setup_bc(struct misdn_bchannel *bc)
 	int channel=bc->channel-1-(bc->channel>16);
 	int b_stid=stack->b_stids[channel>=0?channel:0];
 
-
+	
 	switch (bc->bc_state) {
 		case BCHAN_CLEANED:
 			break;
@@ -975,6 +975,15 @@ int setup_bc(struct misdn_bchannel *bc)
 	
 	cb_log(5, stack->port, "$$$ Setting up bc with stid :%x\n", b_stid);
 	
+	/*check if the b_stid is alread initialized*/
+	int i;
+	for (i=0; i <= stack->b_num; i++) {
+		if (stack->bc[i].b_stid == b_stid) {
+			cb_log(0, bc->port, "setup_bc: b_stid:%x already in use !!!\n", b_stid);
+			return -1;
+		}
+	}
+	
 	if (b_stid <= 0) {
 		cb_log(0, stack->port," -- Stid <=0 at the moment in channel:%d\n",channel);