Add initial remsim-client skeleton

Doesn't rally do much but to connect to bankd and send a
ConnectClientReq to it.

Change-Id: Ia67011ca690d90b7b670eb85dd0bc507d6c96d49

src/Makefile.am

@@ -13,7 +13,7 @@ libosmo_rspro_la_SOURCES = rspro_util.c rspro_client.c
 
 noinst_HEADERS = bankd.h internal.h rspro_util.h
 
-bin_PROGRAMS = pcsc_test remsim-bankd
+bin_PROGRAMS = pcsc_test remsim-bankd remsim-client
 
 pcsc_test_SOURCES = driver_core.c driver_pcsc.c main.c
 pcsc_test_LDADD = $(OSMOCORE_LIBS) \
@@ -22,3 +22,7 @@ pcsc_test_LDADD = $(OSMOCORE_LIBS) \
 remsim_bankd_SOURCES = bankd_slotmap.c bankd_main.c
 remsim_bankd_LDADD = $(OSMOCORE_LIBS) \
 		     $(ASN1C_LIBS) $(PCSC_LIBS) libosmo-rspro.la
+
+remsim_client_SOURCES = remsim_client.c
+remsim_client_LDADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(OSMOABIS_LIBS) \
+		     $(ASN1C_LIBS) libosmo-rspro.la

src/remsim_client.c

@@ -0,0 +1,148 @@
+
+#include <errno.h>
+#include <string.h>
+
+#include <talloc.h>
+
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+
+#include <osmocom/abis/ipa.h>
+#include <osmocom/gsm/protocol/ipaccess.h>
+
+#include "rspro_util.h"
+
+struct bankd_client {
+	/* connection to the remsim-server (control) */
+	struct ipa_client_conn *srv_conn;
+
+	/* our own component ID */
+	struct app_comp_id own_comp_id;
+
+	/* connection to the remsim-bankd */
+	char *bankd_host;
+	uint16_t bankd_port;
+	struct ipa_client_conn *bankd_conn;
+};
+
+
+static void bankd_send(struct bankd_client *bc, struct msgb *msg_tx)
+{
+	ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO);
+	ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO);
+	ipa_client_conn_send(bc->bankd_conn, msg_tx);
+	/* msg_tx is now queued and will be freed. */
+}
+
+static void bankd_send_rspro(struct bankd_client *bc, RsproPDU_t *rspro)
+{
+	struct msgb *msg = rspro_enc_msg(rspro);
+	OSMO_ASSERT(msg);
+	bankd_send(bc, msg);
+}
+
+
+
+
+
+
+
+
+
+
+
+
+static void bankd_updown_cb(struct ipa_client_conn *conn, int up)
+{
+	struct bankd_client *bc = conn->data;
+
+	printf("RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN");
+	if (!up)
+		exit(3);
+	else {
+		const ClientSlot_t clslot = { .clientId = 23, .slotNr = 1 };
+		RsproPDU_t *pdu = rspro_gen_ConnectClientReq(&bc->own_comp_id, &clslot);
+		bankd_send_rspro(bc, pdu);
+	}
+}
+
+static int bankd_read_cb(struct ipa_client_conn *conn, struct msgb *msg)
+{
+	struct ipaccess_head *hh = (struct ipaccess_head *) msg->data;
+	struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg);
+	struct bankd_client *bc = conn->data;
+
+	if (msgb_length(msg) < sizeof(*hh))
+		goto invalid;
+	msg->l2h = &hh->data[0];
+	if (hh->proto != IPAC_PROTO_OSMO)
+		goto invalid;
+	if (!he || msgb_l2len(msg) < sizeof(*he))
+		goto invalid;
+	msg->l2h = &he->data[0];
+
+	if (he->proto != IPAC_PROTO_EXT_RSPRO)
+		goto invalid;
+
+	/* FIXME: do something */
+	printf("Received RSPRO %s\n", msgb_hexdump(msg));
+
+	msgb_free(msg);
+	return 0;
+
+invalid:
+	msgb_free(msg);
+	return -1;
+}
+
+static const struct log_info_cat default_categories[] = {
+};
+
+static const struct log_info log_info = {
+	.cat = default_categories,
+	.num_cat = ARRAY_SIZE(default_categories),
+};
+
+static struct bankd_client g_client;
+static void *g_tall_ctx;
+void __thread *talloc_asn1_ctx;
+extern int asn_debug;
+
+int main(int argc, char **argv)
+{
+	int rc;
+
+	g_tall_ctx = talloc_named_const(NULL, 0, "global");
+
+	g_client.bankd_host = "localhost";
+	g_client.bankd_port = 9999;
+	g_client.own_comp_id.type = ComponentType_remsimClient;
+	OSMO_STRLCPY_ARRAY(g_client.own_comp_id.name, "fixme-name");
+	OSMO_STRLCPY_ARRAY(g_client.own_comp_id.software, "remsim-client");
+	OSMO_STRLCPY_ARRAY(g_client.own_comp_id.sw_version, PACKAGE_VERSION);
+
+	//asn_debug = 1;
+	osmo_init_logging2(g_tall_ctx, &log_info);
+
+	g_client.bankd_conn = ipa_client_conn_create(g_tall_ctx, NULL, 0,
+						   g_client.bankd_host, g_client.bankd_port,
+						   bankd_updown_cb, bankd_read_cb,
+						   NULL, &g_client);
+	if (!g_client.bankd_conn) {
+		fprintf(stderr, "Unable to connect: %s\n", strerror(errno));
+		exit(1);
+	}
+	rc = ipa_client_conn_open(g_client.bankd_conn);
+	if (rc < 0) {
+		fprintf(stderr, "Unable to connect RSPRO to %s:%d - %s\n",
+			g_client.bankd_conn->addr, g_client.bankd_conn->port, strerror(errno));
+		return 0;
+	}
+
+	while (1) {
+		osmo_select_main(0);
+	}
+}