Added linkage id handling for CCBS/CCNR.

README

@@ -202,6 +202,11 @@ ECT:
         exten => s,1,capicommand(hold)
         exten => s,2,Dial(CAPI/contr1/1234,,M(capi3pty))
 
+Peer link creation:
+    Create a reference for chan-capi to know who is the calling channel on Dial().
+    This is needed if you want to use CCBS/CCNR afterwards.
+        Example:
+        exten => s,1,capicommand(peerlink)
 
 Using CLIR
 ==========
@@ -362,7 +367,10 @@ CALLINGSUBADDRESS
 
 CALLEDSUBADDRESS
     If set on dial(), the called subaddress will be set to the content.
- 
+
+CCLINKAGEID
+    If a Call-Linkage-Id is received for CCBS/CCNR, this variable contains this Id.
+
 CONNECTEDNUMBER
     Can be set before answering and if set, the content is used for
     IE 'Connected Number' on answering.

chan_capi.c

@@ -1210,6 +1210,8 @@ static int pbx_capi_call(struct ast_channel *c, char *idest, int timeout)
 		dsa = calledsubaddress;
 	}
 
+	i->peer = cc_get_peer_link_id(pbx_builtin_getvar_helper(c, "CAPIPEERLINKID"));
+
 	i->MessageNumber = get_capi_MessageNumber();
 	CONNECT_REQ_HEADER(&CMSG, capi_ApplID, i->MessageNumber, i->controller);
 	CONNECT_REQ_CONTROLLER(&CMSG) = i->controller;
@@ -4050,6 +4052,24 @@ static int pbx_capi_call_deflect(struct ast_channel *c, char *param)
 	return(res);
 }
 
+/*
+ * store the peer for future actions 
+ */
+static int pbx_capi_peer_link(struct ast_channel *c, char *param)
+{
+	char buffer[32];
+	int id;
+
+	id = cc_add_peer_link_id(c);
+
+	if (id >= 0) {
+		snprintf(buffer, sizeof(buffer) - 1, "%d", id);
+		pbx_builtin_setvar_helper(c, "_CAPIPEERLINKID", buffer);
+	}
+
+	return 0;
+}
+
 /*
  * retrieve a hold on call
  */
@@ -4621,6 +4641,7 @@ static struct capicommands_s {
 	int (*cmd)(struct ast_channel *, char *);
 	int capionly;
 } capicommands[] = {
+	{ "peerlink",     pbx_capi_peer_link,       0 },
 	{ "progress",     pbx_capi_signal_progress, 1 },
 	{ "deflect",      pbx_capi_call_deflect,    1 },
 	{ "receivefax",   pbx_capi_receive_fax,     1 },
@@ -4634,7 +4655,7 @@ static struct capicommands_s {
 	{ "ect",          pbx_capi_ect,             1 },
 	{ "3pty_begin",	  pbx_capi_3pty_begin,	    1 },
  	{ "qsig_ssct",	  pbx_capi_qsig_ssct,	    1 },
-  	{ "qsig_ct",	  pbx_capi_qsig_ct,	    1 },
+  	{ "qsig_ct",      pbx_capi_qsig_ct,         1 },
    	{ "qsig_callmark",pbx_capi_qsig_callmark,   1 },
 	{ "qsig_getplci", pbx_capi_qsig_getplci,    1 },
   	{ NULL, NULL, 0 }

chan_capi.h

@@ -291,6 +291,9 @@ struct capi_pvt {
 	/*! Channel we belong to, possibly NULL */
 	struct ast_channel *owner;		
 	
+	/*! Channel who called us, possibly NULL */
+	struct ast_channel *peer;		
+	
 	/* capi message number */
 	_cword MessageNumber;	
 	unsigned int NCCI;

chan_capi_supplementary.c

@@ -20,6 +20,53 @@
 #include "chan_capi_supplementary.h"
 #include "chan_capi_utils.h"
 
+#define CCBSNR_MAX_LIST_ENTRIES 32
+static struct ccbsnr_s ccbsnr_list[CCBSNR_MAX_LIST_ENTRIES];
+
+/*
+ * a new CCBS/CCNR id was received
+ */
+static void new_ccbsnr_id(ccbsnrtype_t type, unsigned int plci,
+	_cword id, struct capi_pvt *i)
+{
+	int a;
+	char buffer[CAPI_MAX_STRING];
+
+	for (a = 0; a < CCBSNR_MAX_LIST_ENTRIES; a++) {
+		if (ccbsnr_list[a].type == CCBSNR_TYPE_NULL) {
+			ccbsnr_list[a].type = type;
+			ccbsnr_list[a].id = id;
+			ccbsnr_list[a].plci = plci;
+			ccbsnr_list[a].state = CCBSNR_AVAILABLE;
+
+			if (i->peer) {
+				snprintf(buffer, CAPI_MAX_STRING-1, "%d", (id | ((plci & 0xff) << 16)));
+				pbx_builtin_setvar_helper(i->peer, "CCLINKAGEID", buffer);
+			}
+			break;
+		}
+	}
+	if (a == CCBSNR_MAX_LIST_ENTRIES) {
+		cc_log(LOG_ERROR, "No free entry for new CCBS/CCNR ID\n");
+	}
+}
+
+/*
+ * a CCBS/CCNR id was removed 
+ */
+static void del_ccbsnr_id(unsigned int plci, _cword id)
+{
+	int a;
+
+	for (a = 0; a < CCBSNR_MAX_LIST_ENTRIES; a++) {
+		if (((ccbsnr_list[a].plci & 0xff) == (plci & 0xff)) &&
+		   (ccbsnr_list[a].id == id)) {
+			ccbsnr_list[a].type = CCBSNR_TYPE_NULL;
+			ccbsnr_list[a].state = 0;
+			break;
+		}
+	}
+}
 
 /*
  * send Listen for supplementary to specified controller
@@ -81,6 +128,7 @@ void handle_facility_indication_supplementary(
 	case 0x800d: /* CCBS erase call linkage ID */
 		cc_verbose(1, 1, VERBOSE_PREFIX_3 "contr%d: PLCI=%#x CCBS/CCNR erase id=0x%04x\n",
 			PLCI & 0xff, PLCI, infoword);
+		del_ccbsnr_id(PLCI, infoword);
 		break;
 	}
 
@@ -134,10 +182,12 @@ void handle_facility_indication_supplementary(
 	case 0x8013: /* CCBS info retain */
 		cc_verbose(1, 1, VERBOSE_PREFIX_3 "%s: PLCI=%#x CCBS unique id=0x%04x\n",
 			i->vname, PLCI, infoword);
+		new_ccbsnr_id(CCBSNR_TYPE_CCBS, PLCI, infoword, i);
 		break;
 	case 0x8015: /* CCNR info retain */
 		cc_verbose(1, 1, VERBOSE_PREFIX_3 "%s: PLCI=%#x CCNR unique id=0x%04x\n",
 			i->vname, PLCI, infoword);
+		new_ccbsnr_id(CCBSNR_TYPE_CCNR, PLCI, infoword, i);
 		break;
 	case 0x800d: /* CCBS erase call linkage ID */
 		/* handled above */

chan_capi_supplementary.h

@@ -20,4 +20,22 @@
 extern void ListenOnSupplementary(unsigned controller);
 extern void handle_facility_indication_supplementary(_cmsg *CMSG, unsigned int PLCI, unsigned int NCCI, struct capi_pvt *i);
 
+typedef enum {
+	CCBSNR_TYPE_NULL = 0,
+	CCBSNR_TYPE_CCBS,
+	CCBSNR_TYPE_CCNR
+} ccbsnrtype_t;
+
+#define CCBSNR_AVAILABLE  1
+
+struct ccbsnr_s {
+	ccbsnrtype_t type;
+	_cword id;
+	unsigned int plci;
+	unsigned int state;
+	char context[AST_MAX_CONTEXT];
+	char exten[AST_MAX_EXTENSION];
+	int priority;
+};
+
 #endif

chan_capi_utils.c

@@ -12,6 +12,7 @@
  */
  
 #include <stdio.h>
+#include <stdlib.h>
 #include "chan_capi20.h"
 #include "chan_capi.h"
 #include "chan_capi_utils.h"
@@ -26,6 +27,9 @@ AST_MUTEX_DEFINE_STATIC(capi_put_lock);
 
 static _cword capi_MessageNumber;
 
+#define CAPI_MAX_PEERLINKCHANNELS  32
+static struct ast_channel *peerlinkchannel[CAPI_MAX_PEERLINKCHANNELS];
+
 /*
  * helper for <pbx>_verbose with different verbose settings
  */
@@ -617,3 +621,41 @@ void parse_dialstring(char *buffer, char **interface, char **dest, char **param,
 	return;
 }
 
+/*
+ * Add a new peer link id
+ */
+int cc_add_peer_link_id(struct ast_channel *c)
+{
+	int a;
+
+	for (a = 0; a < CAPI_MAX_PEERLINKCHANNELS; a++) {
+		if (peerlinkchannel[a] == NULL) {
+			peerlinkchannel[a] = c;
+			break;
+		}
+	}
+	if (a == CAPI_MAX_PEERLINKCHANNELS) {
+		return -1;
+	}
+	return a;
+}
+
+/*
+ * Get and remove peer link id
+ */
+struct ast_channel *cc_get_peer_link_id(const char *p)
+{
+	int id = -1;
+	struct ast_channel *chan = NULL;
+
+	if (p) {
+		id = (int)strtoul(p, NULL, 0);
+	}
+
+	if ((id >= 0) && (id < CAPI_MAX_PEERLINKCHANNELS)) {
+		chan = peerlinkchannel[id];
+		peerlinkchannel[id] = NULL;
+	}
+	return chan;
+}
+

chan_capi_utils.h

@@ -29,6 +29,8 @@ extern void show_capi_info(struct capi_pvt *i, _cword info);
 extern unsigned ListenOnController(unsigned long CIPmask, unsigned controller);
 extern void parse_dialstring(char *buffer, char **interface, char **dest, char **param, char **ocid);
 extern char *capi_number_func(unsigned char *data, unsigned int strip, char *buf);
+extern int cc_add_peer_link_id(struct ast_channel *c);
+extern struct ast_channel *cc_get_peer_link_id(const char *p);
 
 #define capi_number(data, strip) \
   capi_number_func(data, strip, alloca(AST_MAX_EXTENSION))