initial import of osmo-gsup-hlr code so far
diff --git a/src/hlr.c b/src/hlr.c
new file mode 100644
index 0000000..be0e96e
--- /dev/null
+++ b/src/hlr.c
@@ -0,0 +1,109 @@
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+#include <osmocom/gsm/gsup.h>
+
+#include "db.h"
+#include "logging.h"
+#include "gsup_server.h"
+#include "rand.h"
+
+static struct db_context *g_dbc;
+
+/* process an incoming SAI request */
+static int rx_send_auth_info(struct osmo_gsup_conn *conn,
+ const struct osmo_gsup_message *gsup)
+{
+ struct osmo_gsup_message gsup_out;
+ struct msgb *msg_out;
+ int rc;
+
+ /* initialize return message structure */
+ memset(&gsup_out, 0, sizeof(gsup_out));
+ gsup_out.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT;
+ memcpy(&gsup_out.imsi, &gsup->imsi, sizeof(gsup_out.imsi));
+
+ rc = db_get_auc(g_dbc, gsup->imsi, gsup_out.auth_vectors,
+ ARRAY_SIZE(gsup_out.auth_vectors),
+ NULL /* gsup->rand_auts */, gsup->auts);
+ if (rc <= 0) {
+ gsup_out.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR;
+ }
+
+ msg_out = msgb_alloc(1024, "GSUP response");
+ osmo_gsup_encode(msg_out, &gsup_out);
+ return osmo_gsup_conn_send(conn, msg_out);
+}
+
+static int read_cb(struct osmo_gsup_conn *conn, struct msgb *msg)
+{
+ static struct osmo_gsup_message gsup;
+ int rc;
+
+ rc = osmo_gsup_decode(msgb_l3(msg), msgb_l3len(msg), &gsup);
+ if (rc < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "error in GSUP decode: %d\n", rc);
+ return rc;
+ }
+
+ switch (gsup.message_type) {
+ /* requests sent to us */
+ case OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST:
+ rx_send_auth_info(conn, &gsup);
+ break;
+ case OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST:
+ break;
+ /* responses to requests sent by us */
+ case OSMO_GSUP_MSGT_INSERT_DATA_ERROR:
+ break;
+ case OSMO_GSUP_MSGT_INSERT_DATA_RESULT:
+ break;
+ default:
+ LOGP(DMAIN, LOGL_DEBUG, "Unhandled GSUP message type %u\n",
+ gsup.message_type);
+ break;
+ }
+ return 0;
+}
+
+
+int main(int argc, char **argv)
+{
+ struct osmo_gsup_server *gs;
+ int rc;
+
+ rc = osmo_init_logging(&hlr_log_info);
+ if (rc < 0) {
+ fprintf(stderr, "Error initializing logging\n");
+ exit(1);
+ }
+ LOGP(DMAIN, LOGL_NOTICE, "hlr starting\n");
+
+ rc = rand_init();
+ if (rc < 0) {
+ LOGP(DMAIN, LOGL_FATAL, "Error initializing random source\n");
+ exit(1);
+ }
+
+ g_dbc = db_open(NULL, "hlr.db");
+ if (!g_dbc) {
+ LOGP(DMAIN, LOGL_FATAL, "Error opening database\n");
+ exit(1);
+ }
+
+ gs = osmo_gsup_server_create(NULL, NULL, 2222, read_cb);
+ if (!gs) {
+ LOGP(DMAIN, LOGL_FATAL, "Error starting GSUP server\n");
+ exit(1);
+ }
+
+ while (1) {
+ osmo_select_main(0);
+ }
+
+ db_close(g_dbc);
+
+ log_fini();
+
+ exit(0);
+}