initial checkin of osmo-remsim

This adds some initial code, particularly the ASN.1 definition of the
RSPRO protocol, related makefile to build it using ffasn1c, and our
usual autoconf infrastructure to build it.

Change-Id: Ibaa993b59e9a65a0242b0f42b27d9cd29f8e1878
diff --git a/src/rspro/RsproPDU.c b/src/rspro/RsproPDU.c
new file mode 100644
index 0000000..2aa0862
--- /dev/null
+++ b/src/rspro/RsproPDU.c
@@ -0,0 +1,122 @@
+/*
+ * Generated by asn1c-0.9.28 (http://lionet.info/asn1c)
+ * From ASN.1 module "RSPRO"
+ * 	found in "../../asn1/RSPRO.asn"
+ */
+
+#include <osmocom/rspro/RsproPDU.h>
+
+static int
+memb_version_constraint_1(asn_TYPE_descriptor_t *td, const void *sptr,
+			asn_app_constraint_failed_f *ctfailcb, void *app_key) {
+	long value;
+	
+	if(!sptr) {
+		_ASN_CTFAIL(app_key, td, sptr,
+			"%s: value not given (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+	
+	value = *(const long *)sptr;
+	
+	if((value >= 0l && value <= 32l)) {
+		/* Constraint check succeeded */
+		return 0;
+	} else {
+		_ASN_CTFAIL(app_key, td, sptr,
+			"%s: constraint failed (%s:%d)",
+			td->name, __FILE__, __LINE__);
+		return -1;
+	}
+}
+
+static int asn_DFL_2_set_1(int set_value, void **sptr) {
+	long *st = *sptr;
+	
+	if(!st) {
+		if(!set_value) return -1;	/* Not a default value */
+		st = (*sptr = CALLOC(1, sizeof(*st)));
+		if(!st) return -1;
+	}
+	
+	if(set_value) {
+		/* Install default value 1 */
+		*st = 1l;
+		return 0;
+	} else {
+		/* Test default value 1 */
+		return (*st == 1);
+	}
+}
+static asn_TYPE_member_t asn_MBR_RsproPDU_1[] = {
+	{ ATF_POINTER, 1, offsetof(struct RsproPDU, version),
+		(ASN_TAG_CLASS_CONTEXT | (0 << 2)),
+		-1,	/* IMPLICIT tag at current level */
+		&asn_DEF_NativeInteger,
+		memb_version_constraint_1,
+		0,	/* PER is not compiled, use -gen-PER */
+		asn_DFL_2_set_1,	/* DEFAULT 1 */
+		"version"
+		},
+	{ ATF_NOFLAGS, 0, offsetof(struct RsproPDU, tag),
+		(ASN_TAG_CLASS_CONTEXT | (1 << 2)),
+		-1,	/* IMPLICIT tag at current level */
+		&asn_DEF_OperationTag,
+		0,	/* Defer constraints checking to the member type */
+		0,	/* PER is not compiled, use -gen-PER */
+		0,
+		"tag"
+		},
+	{ ATF_NOFLAGS, 0, offsetof(struct RsproPDU, msg),
+		(ASN_TAG_CLASS_CONTEXT | (2 << 2)),
+		+1,	/* EXPLICIT tag at current level */
+		&asn_DEF_RsproPDUchoice,
+		0,	/* Defer constraints checking to the member type */
+		0,	/* PER is not compiled, use -gen-PER */
+		0,
+		"msg"
+		},
+};
+static const ber_tlv_tag_t asn_DEF_RsproPDU_tags_1[] = {
+	(ASN_TAG_CLASS_UNIVERSAL | (16 << 2))
+};
+static const asn_TYPE_tag2member_t asn_MAP_RsproPDU_tag2el_1[] = {
+    { (ASN_TAG_CLASS_CONTEXT | (0 << 2)), 0, 0, 0 }, /* version */
+    { (ASN_TAG_CLASS_CONTEXT | (1 << 2)), 1, 0, 0 }, /* tag */
+    { (ASN_TAG_CLASS_CONTEXT | (2 << 2)), 2, 0, 0 } /* msg */
+};
+static asn_SEQUENCE_specifics_t asn_SPC_RsproPDU_specs_1 = {
+	sizeof(struct RsproPDU),
+	offsetof(struct RsproPDU, _asn_ctx),
+	asn_MAP_RsproPDU_tag2el_1,
+	3,	/* Count of tags in the map */
+	0, 0, 0,	/* Optional elements (not needed) */
+	-1,	/* Start extensions */
+	-1	/* Stop extensions */
+};
+asn_TYPE_descriptor_t asn_DEF_RsproPDU = {
+	"RsproPDU",
+	"RsproPDU",
+	SEQUENCE_free,
+	SEQUENCE_print,
+	SEQUENCE_constraint,
+	SEQUENCE_decode_ber,
+	SEQUENCE_encode_der,
+	SEQUENCE_decode_xer,
+	SEQUENCE_encode_xer,
+	0, 0,	/* No UPER support, use "-gen-PER" to enable */
+	0, 0,	/* No APER support, use "-gen-PER" to enable */
+	0,	/* Use generic outmost tag fetcher */
+	asn_DEF_RsproPDU_tags_1,
+	sizeof(asn_DEF_RsproPDU_tags_1)
+		/sizeof(asn_DEF_RsproPDU_tags_1[0]), /* 1 */
+	asn_DEF_RsproPDU_tags_1,	/* Same as above */
+	sizeof(asn_DEF_RsproPDU_tags_1)
+		/sizeof(asn_DEF_RsproPDU_tags_1[0]), /* 1 */
+	0,	/* No PER visible constraints */
+	asn_MBR_RsproPDU_1,
+	3,	/* Elements count */
+	&asn_SPC_RsproPDU_specs_1	/* Additional specs */
+};
+