MT#20617 support BER/DER encoding

Change-Id: Ic72b3817b3d2a1780493e6ee0fc964ea35029b9e

include/libtcap.h

@@ -28,5 +28,7 @@ int inap_extract(const char *buf, size_t len, const char *spec, struct output_bu
 int isup_convert_number(const char *inp, int inlen, char *out);
 int isup_convert_number_hex(const char *inp, int inlen, char *out);
 
+int tcap_encode(char **out, TCMessage_t *msg);
+
 
 #endif

src/tcap.c

@@ -36,6 +36,38 @@ static asn_TYPE_descriptor_t *opcode_type_map[] = {
 
 
 
+static int buf_append(const void *buffer, size_t size, void *app_key) {
+	FILE *fp = app_key;
+	size_t ret;
+
+	if (!buffer || !size)
+		return 0;
+	//fprintf(stderr, "writing %p %lu\n", buffer, size);
+	ret = fwrite(buffer, size, 1, fp);
+	return (ret == 1) ? 0 : -1;
+}
+
+int tcap_encode(char **out, TCMessage_t *msg) {
+	FILE *fp;
+	char *str;
+	size_t len;
+	asn_enc_rval_t ec;
+
+	fp = open_memstream(&str, &len);
+	if (!fp)
+		return -1;
+
+	ec = der_encode(&asn_DEF_TCMessage, msg, buf_append, fp);
+
+	fclose(fp);
+
+	if (ec.encoded == -1)
+		return -1;
+
+	*out = str;
+	return len;
+}
+
 TCMessage_t *tcap_decode(const char *buf, size_t len) {
 	TCMessage_t *ret = NULL;
 	asn_dec_rval_t rv;

tests/.gitignore

@@ -1,2 +1,3 @@
 *.sw?
 basic
+encode

tests/Makefile

@@ -1,9 +1,12 @@
 .PHONY: all clean
 
-all: basic
+all: basic encode
 
 basic: basic.c ../src/libtcap.so.0
 	gcc -Wall -g -I ../include -I../asn1-compiled basic.c -o basic -L../src -ltcap
 
+encode: encode.c ../src/libtcap.so.0
+	gcc -Wall -g -I ../include -I../asn1-compiled encode.c -o encode -L../src -ltcap
+
 clean:
-	rm -f basic
+	rm -f basic encode

tests/basic.c

@@ -6,8 +6,14 @@
 
 
 //const char tcap[] = "\x64\x81\x86\x49\x03\x0a\x7e\x71\x6b\x2a\x28\x28\x06\x07\x00\x11\x86\x05\x01\x01\x01\xa0\x1d\x61\x1b\xa1\x0d\x06\x0b\x2a\x81\x76\x82\x15\x01\x01\x01\x01\x00\x01\xa2\x03\x02\x01\x00\xa3\x05\xa1\x03\x02\x01\x00\x6c\x53\xa1\x10\x02\x01\x58\x02\x01\x22\xbf\x33\x07\x83\x05\x31\x30\x30\x32\x34\xa1\x3f\x02\x01\x59\x02\x01\x14\x30\x37\xa0\x0e\x04\x0c\x83\x90\x89\x10\x10\x80\x22\x08\x00\x55\x50\x05\x83\x01\x09\x9a\x22\x30\x20\xa0\x1e\x80\x01\x00\x81\x01\x00\x82\x01\x01\x83\x01\x01\x84\x01\x00\x85\x01\x00\x86\x01\x01\x87\x01\x01\x88\x01\x00\x89\x01\x00";
-const char tcap[] = "\x62\x51\x48\x03\x0a\x7e\x71\x6b\x22\x28\x20\x06\x07\x00\x11\x86\x05\x01\x01\x01\xa0\x15\x60\x13\x80\x02\x07\x80\xa1\x0d\x06\x0b\x2a\x81\x76\x82\x15\x01\x01\x01\x01\x00\x01\x6c\x26\xa1\x24\x02\x01\x01\x02\x01\x00\x30\x1c\x80\x01\x02\x82\x07\x03\x90\x08\x00\x55\x50\xf5\x83\x07\x83\x13\x17\x45\x64\x86\x08\x85\x01\x0a\x9a\x02\x20\x01";
-const int tcap_len = sizeof(tcap) - 1;
+//const char tcap[] = "\x62\x51\x48\x03\x0a\x7e\x71\x6b\x22\x28\x20\x06\x07\x00\x11\x86\x05\x01\x01\x01\xa0\x15\x60\x13\x80\x02\x07\x80\xa1\x0d\x06\x0b\x2a\x81\x76\x82\x15\x01\x01\x01\x01\x00\x01\x6c\x26\xa1\x24\x02\x01\x01\x02\x01\x00\x30\x1c\x80\x01\x02\x82\x07\x03\x90\x08\x00\x55\x50\xf5\x83\x07\x83\x13\x17\x45\x64\x86\x08\x85\x01\x0a\x9a\x02\x20\x01";
+const char tcap[] = {
+  0x62, 0x1c, 0x48, 0x00, 0x6c, 0x18, 0xa1, 0x16, 0x02, 0x01, 0x00, 0x02,
+  0x01, 0x14, 0x30, 0x0e, 0xa0, 0x0c, 0x04, 0x0a, 0x31, 0x32, 0x33, 0x34,
+  0x35, 0x36, 0x37, 0x38, 0x39, 0x30
+};
+//const int tcap_len = sizeof(tcap) - 1;
+const int tcap_len = sizeof(tcap);
 
 
 int main() {
@@ -31,13 +37,13 @@ int main() {
 //	i = inap_extract(tcap, tcap_len, "ConnectArg.destinationRoutingAddress", &out);
 //	printf("inap_extract ConnectArg.destinationRoutingAddress: returned %i, value %.*s\n", i, (int) out.used, out.buf);
 //
-//	OUTPUT_BUFFER_INIT(&out, buf);
-//	i = inap_extract(tcap, tcap_len, "ConnectArg.destinationRoutingAddress.0", &out);
-//	printf("inap_extract ConnectArg: returned %i, value %.*s\n", i, (int) out.used, out.buf);
-
 	OUTPUT_BUFFER_INIT(&out, buf);
-	i = inap_extract(tcap, tcap_len, "InitialDPArg.calledPartyNumber", &out);
-	printf("inap_extract InitialDPArg: returned %i, value %.*s\n", i, (int) out.used, out.buf);
+	i = inap_extract(tcap, tcap_len, "ConnectArg.destinationRoutingAddress.0", &out);
+	printf("inap_extract ConnectArg: returned %i, value %.*s\n", i, (int) out.used, out.buf);
+
+//	OUTPUT_BUFFER_INIT(&out, buf);
+//	i = inap_extract(tcap, tcap_len, "InitialDPArg.calledPartyNumber", &out);
+//	printf("inap_extract InitialDPArg: returned %i, value %.*s\n", i, (int) out.used, out.buf);
 
 	return 0;
 }

tests/encode.c

@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "libtcap.h"
+#include "TCMessage.h"
+#include "ComponentPortion.h"
+#include "Component.h"
+#include "ConnectArg.h"
+#include "CalledPartyNumber.h"
+
+int main() {
+	char *buf;
+	int ret;
+	TCMessage_t msg;
+	ComponentPortion_t cp;
+	Component_t *cmp_arr;
+	Component_t cmp;
+	ConnectArg_t ca;
+	CalledPartyNumber_t *cpn_arr;
+	CalledPartyNumber_t cpn;
+
+	memset(&msg, 0, sizeof(msg));
+	memset(&cp, 0, sizeof(cp));
+	memset(&cmp, 0, sizeof(cmp));
+	memset(&ca, 0, sizeof(ca));
+	memset(&cpn, 0, sizeof(cpn));
+
+	msg.present = TCMessage_PR_begin;
+	msg.choice.begin.components = &cp;
+
+	cp.list.count = 1;
+	cmp_arr = &cmp;
+	cp.list.array = &cmp_arr;
+
+	cmp.present = Component_PR_invoke;
+	cmp.choice.invoke.opCode.present = OPERATION_PR_localValue;
+	asn_long2INTEGER(&cmp.choice.invoke.opCode.choice.localValue, 20); // connect
+
+	ca.destinationRoutingAddress.list.count = 1;
+	cpn_arr = &cpn;
+	ca.destinationRoutingAddress.list.array = &cpn_arr;
+
+	cpn.buf = "1234567890";
+	cpn.size = 10;
+
+	cmp.choice.invoke.parameter = ANY_new_fromType(&asn_DEF_ConnectArg, &ca);
+
+	ret = tcap_encode(&buf, &msg);
+	fprintf(stderr, "ret: %i\n", ret);
+	fwrite(buf, ret, 1, stdout);
+
+	free(buf);
+	asn_DEF_ANY.free_struct(&asn_DEF_ANY, cmp.choice.invoke.parameter, 0);
+	asn_DEF_INTEGER.free_struct(&asn_DEF_INTEGER, &cmp.choice.invoke.opCode.choice.localValue, 0);
+
+	return 0;
+}