QSIG:

- added code for QSIG number handling
 - cleanup code for CallTransfer - more some more cleanup has to follow
 - deactivated pathReplacementon on call transfer - there's a bug somewhere

chan_capi.c

@@ -32,6 +32,7 @@
 #include "chan_capi.h"
 #include "chan_capi_rtp.h"
 #include "chan_capi_qsig.h"
+#include "chan_capi_qsig_ecma.h"
 #include "chan_capi_qsig_asn197ade.h"
 #include "chan_capi_qsig_asn197no.h"
 #include "chan_capi_utils.h"

chan_capi_qsig.h

@@ -101,6 +101,8 @@
 
 #define CCQSIG_TIMER_WAIT_PRPROPOSE 1		/* Wait x seconds */
 
+/* Common QSIG structs */
+
 /*
  * INVOKE Data struct, contains data for further operations
  */
@@ -136,6 +138,7 @@ struct cc_qsig_nfe {
 	struct cc_qsig_entityaddr dst_addr;	/* same here for destination */
 };
 
+/* struct cc_qsig_calltransfer */
 
 
 /*
@@ -182,20 +185,5 @@ extern void interface_cleanup_qsig(struct capi_pvt *i);
 extern void pbx_capi_qsig_unload_module(struct capi_pvt *i);
 extern void pbx_capi_qsig_handle_info_indication(_cmsg *CMSG, unsigned int PLCI, unsigned int NCCI, struct capi_pvt *i);
 
-/*
- *** ECMA QSIG Functions 
- */
-
-extern void cc_qsig_op_ecma_isdn_namepres(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
-extern int cc_qsig_encode_ecma_name_invoke(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, int nametype);
-
-extern void cc_qsig_op_ecma_isdn_leginfo2(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
-
-extern void cc_qsig_op_ecma_isdn_prpropose(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
-extern void cc_qsig_encode_ecma_prpropose(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param);
-
-extern void cc_qsig_encode_ecma_sscalltransfer(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param);
-extern void cc_qsig_encode_ecma_calltransfer(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param, int info);
-extern char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
 
 #endif

chan_capi_qsig_asn197ade.c

@@ -27,6 +27,7 @@
 #include "chan_capi.h"
 #include "chan_capi_utils.h"
 #include "chan_capi_qsig.h"
+#include "chan_capi_qsig_ecma.h"
 #include "chan_capi_qsig_asn197ade.h"
 
 /*
@@ -116,3 +117,71 @@ unsigned int cc_qsig_asn197ade_add_numdigits(char *buf, int buflen, int *idx, un
 	myidx = 1 + strlen(buf);
 	return myidx;
 }
+
+/*
+ * Returns an "PresentedNumberScreened" from an string, encoded as in addressing-data-elements-asn1-97
+ *	data is pointer to PresentedNumberScreened struct
+ *  return:
+ *	index counter
+ */
+unsigned int cc_qsig_asn197ade_get_pns(unsigned char *data, int *idx, struct asn197ade_numberscreened *ns)
+{	/* sample data:  a0 08 80 03>513<0a 01 00 */
+	int myidx = *idx;
+	char buf[ASN197ADE_NUMDIGITS_STRSIZE+1];
+	unsigned int buflen = sizeof(buf);
+	unsigned res;
+	
+	ns->partyNumber = NULL;
+	ns->screeningInd = userProvidedNotScreened;
+	int numtype;
+	
+	numtype = (data[myidx++] & 0x0F);	/* defines type of Number */
+	
+	/* cc_verbose(1, 1, VERBOSE_PREFIX_4 " * num type %i\n", numtype);   */
+	switch (numtype){
+		case 0:
+			/* myidx points now to length */
+			res = cc_qsig_asn197ade_get_partynumber(buf, buflen, &myidx, data);
+			if (!res)
+				return 0;
+			
+			myidx += res;
+			if (strlen(buf)) {
+				ns->partyNumber = strdup(buf);
+			}
+			
+			/* get screening indicator */
+			if (data[myidx] == ASN1_ENUMERATED) {
+				myidx++;
+				ns->screeningInd = cc_qsig_asn1_get_integer(data, &myidx);
+			}
+			
+			break;
+		case 1:			/* presentation restricted */
+			myidx += data[myidx] + 1;	/* this val should be zero */
+			break;
+		case 2:			/* number not available due to interworking */
+			myidx += data[myidx] + 1;	/* this val should be zero */
+			break;
+		case 3:
+			/* myidx points now to length */
+			res = cc_qsig_asn197ade_get_partynumber(buf, buflen, &myidx, data);
+			if (!res)
+				return 0;
+			
+			myidx += res;
+			if (strlen(buf)) {
+				ns->partyNumber = strdup(buf);
+			}
+			
+			/* get screening indicator */
+			if (data[myidx] == ASN1_ENUMERATED) {
+				myidx++;
+				ns->screeningInd = cc_qsig_asn1_get_integer(data, &myidx);
+			}
+			
+			break;
+	};
+
+	return myidx - *idx;
+}

chan_capi_qsig_asn197ade.h

@@ -23,7 +23,7 @@
 #define ASN197ADE_NUMDIGITS_STRSIZE	20
 
 struct asn197ade_numberscreened {
-	unsigned char *partyNumber;
+	char *partyNumber;
 	enum {
 		userProvidedNotScreened,
 		userProvidedVerifiedAndPassed,
@@ -37,4 +37,6 @@ extern unsigned int cc_qsig_asn197ade_get_numdigits(char *buf, int buflen, int *
 
 extern unsigned int cc_qsig_asn197ade_add_numdigits(char *buf, int buflen, int *idx, unsigned char *data);
 
+extern unsigned int cc_qsig_asn197ade_get_pns(unsigned char *data, int *idx, struct asn197ade_numberscreened *ns);
+
 #endif

chan_capi_qsig_asn197no.c

@@ -27,6 +27,7 @@
 #include "chan_capi.h"
 #include "chan_capi_utils.h"
 #include "chan_capi_qsig.h"
+#include "chan_capi_qsig_ecma.h"
 #include "chan_capi_qsig_asn197no.h"
 
 /*

chan_capi_qsig_core.c

@@ -24,6 +24,7 @@
 #include "chan_capi.h"
 #include "chan_capi_utils.h"
 #include "chan_capi_qsig.h"
+#include "chan_capi_qsig_ecma.h"
 #include "chan_capi_qsig_asn197ade.h"
 #include "chan_capi_qsig_asn197no.h"
 
@@ -574,14 +575,63 @@ signed int cc_qsig_identifyinvoke(struct cc_qsig_invokedata *invoke, int protoco
 	
 }
 
+/*
+ * find the interface (pvt) the PLCI belongs to
+ */
+static struct capi_pvt *capi_find_interface_bynumber(char * num)
+{
+	struct capi_pvt *i;
+
+	if (!num)
+		return NULL;
+
+	for (i = capi_iflist; i; i = i->next) {
+		if (strcmp(i->cid, num) == 0 ||
+		    strcmp(i->dnid, num) == 0)
+			return i;
+	}
+
+#if 0
+	cc_mutex_lock(&nullif_lock);
+	for (i = nulliflist; i; i = i->next) {
+		if (strcmp(i->cid, num) == 0 ||
+		    strcmp(i->dnid, num) == 0)
+			break;
+	}
+	cc_mutex_unlock(&nullif_lock);
+#endif
+	
+	return i;
+}
+
 static void pbx_capi_qsig_handle_ctc(struct cc_qsig_invokedata *invoke, struct capi_pvt *i)
 {
-	char *destination = cc_qsig_decode_ecma_calltransfer(invoke, i);
+	struct cc_qsig_ctcomplete ctc;
+	struct capi_pvt *ii;
+	
+#define CLEAR_CTC {	if (ctc.redirectionNumber.partyNumber)	free(ctc.redirectionNumber.partyNumber);\
+			if (ctc.basicCallInfoElements)	free(ctc.basicCallInfoElements); \
+			if (ctc.redirectionName) free(ctc.redirectionName); \
+			if (ctc.argumentExtension) free(ctc.argumentExtension); }
+
+	int res = cc_qsig_decode_ecma_calltransfer(invoke, i, &ctc);
+	
+	if (!res)
+		return;
 	
-	if (destination) {
-		free(destination);
+	if (ctc.redirectionNumber.partyNumber && (ctc.endDesignation == 2)) { /* TODO: activate this - have a bug in incoming PathReplacement handling */
+		ii = capi_find_interface_bynumber(ctc.redirectionNumber.partyNumber);
+		if (ii) {
+			cc_verbose(1, 1, VERBOSE_PREFIX_3 "QSIG: Call Transfer partner channel for %s found at channel %s\n", ctc.redirectionNumber.partyNumber, ii->vname);
+			
+			CLEAR_CTC
+					
+			ast_channel_masquerade(i->owner, ii->owner);
+		}
 	}
 	
+	CLEAR_CTC
+		
 	return ;
 }
 

chan_capi_qsig_ecma.c

@@ -24,6 +24,7 @@
 #include "chan_capi.h"
 #include "chan_capi_utils.h"
 #include "chan_capi_qsig.h"
+#include "chan_capi_qsig_ecma.h"
 #include "chan_capi_qsig_asn197ade.h"
 #include "chan_capi_qsig_asn197no.h"
 
@@ -427,7 +428,7 @@ void cc_qsig_encode_ecma_calltransfer(unsigned char * buf, unsigned int *idx, st
  * returns
  * 	transfer to destination number
  */
-char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct capi_pvt *i)
+unsigned int cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct capi_pvt *i, struct cc_qsig_ctcomplete *ctc)
 {
 	unsigned int datalength;
 	unsigned int seqlength = 0;
@@ -444,7 +445,15 @@ char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct
 	unsigned int namelength = 0;
 	int temp = 0;
 	
-#define ct_err(x...)	{ cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * not Handling QSIG CALL TRANSFER - "x); return NULL; }
+	ctc->endDesignation = primaryEnd;
+	ctc->redirectionNumber.partyNumber = NULL;
+	ctc->redirectionNumber.screeningInd = userProvidedNotScreened;
+	ctc->basicCallInfoElements = NULL;
+	ctc->redirectionName = NULL;
+	ctc->callStatus = answered;
+	ctc->argumentExtension = NULL;	/* unhandled yet */
+	
+#define ct_err(x...)	{ cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * not Handling QSIG CALL TRANSFER - "x); return 0; }
 	
 	cc_verbose(1, 1, VERBOSE_PREFIX_4 "Handling QSIG CALL TRANSFER (id# %#x)\n", invoke->id);
 
@@ -461,11 +470,20 @@ char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct
 	}
 	
 	if (data[myidx++] == ASN1_ENUMERATED) {
-			ct_enddesignation = cc_qsig_asn1_get_integer(data, &myidx);
+			ctc->endDesignation = cc_qsig_asn1_get_integer(data, &myidx);
 	} else {
 		ct_err("no endDesignation information.\n");
 	}
 	
+	temp = cc_qsig_asn197ade_get_pns(data, &myidx, &ctc->redirectionNumber);
+	
+	if (!temp) {
+		ct_err("error on decoding PresentedNumberScreened value.\n");
+	}
+	myidx += temp;
+	
+	
+#if 0
 	if (data[myidx] == (ASN1_TC_CONTEXTSPEC | ASN1_TF_CONSTRUCTED | 0)) {  /* Parameter 0: partyNumber - transferee number */
 		myidx ++;
 	
@@ -484,7 +502,8 @@ char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct
 	} else {
 		myidx += 2;	/* HACK:	I've seen an IMPLICIT ade "numberNotAvailableDueToInterworking  NULL" */
 	}
-	
+#endif
+					       
 	/* TODO: remove this code snippet, when it's 100% working */
 #if 0
 	if (data[myidx++] == (ASN1_TC_CONTEXTSPEC | ASN1_TF_CONSTRUCTED | 0)) { /* Parameter 0: partyNumber - transferee number */
@@ -514,9 +533,15 @@ char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct
 	
 	if (myidx < datalength) {
 		if (data[myidx] == ASN1_TC_APPLICATION) {
-			/* ignore special Application Parameters - have no info about content */
 			myidx++;
-			cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * QSIG CALL TRANSFER - ignoring application data (%i bytes).\n", (int)data[myidx]);
+			/* TODO: check size -> could be bigger than 256 bytes - MSB is set then */
+			ctc->basicCallInfoElements = malloc(data[myidx]);
+			if (ctc->basicCallInfoElements) {
+				memcpy(ctc->basicCallInfoElements, &data[myidx+1], data[myidx] );
+			} else {
+				cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * QSIG CALL TRANSFER - couldn't allocate memory for basicCallInfoElements.\n", (int)data[myidx]);
+			}
+			/* cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * QSIG CALL TRANSFER - ignoring application data (%i bytes).\n", (int)data[myidx]); */
 			myidx += data[myidx] + 1;
 		}
 	}
@@ -524,18 +549,21 @@ char *cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct
 	if (myidx < datalength) {
 		if (data[myidx] != ASN1_ENUMERATED) { /* Maybe we get an name (OPTIONAL) */
 			myidx += cc_qsig_asn197no_get_name(ct_name, ASN197NO_NAME_STRSIZE+1, &namelength, &myidx, data );
+			if (namelength)
+				ctc->redirectionName = strdup(ct_name);
 		}
 	}
 	
 	if (myidx < datalength) {
 		if (data[myidx++] == ASN1_ENUMERATED) { /* Call Status */
-			ct_status = cc_qsig_asn1_get_integer(data, &myidx);
+			ctc->callStatus = cc_qsig_asn1_get_integer(data, &myidx);
 		}
 	}	
 	
-	cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * Got QSIG CALL TRANSFER endDesignation: %i partyNumber: %s (ScreeningInd: %i), partyName: \"%s\", Call state: %s\n", ct_enddesignation, ct_target, ct_numberpresentation, ct_name, ct_status_txt[ct_status]);
+	cc_verbose(1, 1, VERBOSE_PREFIX_4 "  * Got QSIG CALL TRANSFER endDesignation: %i partyNumber: %s (ScreeningInd: %i), partyName: \"%s\", Call state: %s\n", 
+		   ctc->endDesignation, ctc->redirectionNumber.partyNumber, ctc->redirectionNumber.screeningInd, ctc->redirectionName, ct_status_txt[ctc->callStatus]);
 	
-	return strdup(ct_target);
+	return 1;
 #undef ct_err
 }
 

chan_capi_qsig_ecma.h

@@ -0,0 +1,56 @@
+/*
+ *  (QSIG)
+ *
+ *  Implementation of QSIG extensions for CHAN_CAPI
+ *  
+ *  Copyright 2006-2007 (c) Mario Goegel
+ *
+ *  Mario Goegel <m.goegel@gmx.de>
+ *
+ * This program is free software and may be modified and
+ * distributed under the terms of the GNU Public License.
+ */
+
+#include "chan_capi_qsig_asn197ade.h"
+
+#ifndef PBX_QSIG_ECMA_H
+#define PBX_QSIG_ECMA_H
+
+/* ECMA Features structs */
+
+/* Call Transfer Complete struct */
+struct cc_qsig_ctcomplete {
+	enum {
+		primaryEnd,		/* 0 */
+  		secondaryEnd		/* 1 */
+	} endDesignation;
+	
+	struct asn197ade_numberscreened redirectionNumber;
+	char *basicCallInfoElements;	/* OPTIONAL: ASN1_APPLICATION Type */
+	char *redirectionName;		/* OPTIONAL */
+	enum {
+		answered,
+  		alerting
+	} callStatus;			/* DEFAULT: answered */
+	char *argumentExtension;	/* OPTIONAL: ASN1_SEQUENCE - manufacturer specific extension */
+};
+
+
+/*
+ *** ECMA QSIG Functions 
+ */
+
+extern void cc_qsig_op_ecma_isdn_namepres(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
+extern int cc_qsig_encode_ecma_name_invoke(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, int nametype);
+
+extern void cc_qsig_op_ecma_isdn_leginfo2(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
+
+extern void cc_qsig_op_ecma_isdn_prpropose(struct cc_qsig_invokedata *invoke, struct capi_pvt *i);
+extern void cc_qsig_encode_ecma_prpropose(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param);
+
+extern void cc_qsig_encode_ecma_sscalltransfer(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param);
+
+extern void cc_qsig_encode_ecma_calltransfer(unsigned char * buf, unsigned int *idx, struct cc_qsig_invokedata *invoke, struct capi_pvt *i, char *param, int info);
+extern unsigned int cc_qsig_decode_ecma_calltransfer(struct cc_qsig_invokedata *invoke, struct capi_pvt *i,  struct cc_qsig_ctcomplete *ctc);
+
+#endif