1 files changed, 137 insertions, 0 deletions
diff --git a/examples/udp-test.h b/examples/udp-test.h
new file mode 100644
index 0000000..14bbd91
--- /dev/null
+++ b/examples/udp-test.h
@@ -0,0 +1,137 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <time.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+#include <osmocom/core/select.h>
+#include <osmocom/netif/datagram.h>
+
+#define MAX_MSG 255
+#define NUM_MSG 11
+#define DUDP_TEST 0
+#define THOST "127.0.0.1"
+#define SPORT 15000
+#define CPORT 15001
+
+static struct osmo_dgram *conn;
+static void *tall_test;
+bool please_dont_die = true;
+
+static void sighandler(int foo)
+{
+	LOGP(DLINP, LOGL_NOTICE, "closing UDP test...\n");
+	osmo_dgram_close(conn);
+	osmo_dgram_destroy(conn);
+	please_dont_die = false;
+}
+
+static inline struct msgb *print_recv(struct osmo_dgram *conn)
+{
+	struct msgb *msg = msgb_alloc(MAX_MSG, "UDP/test");
+	int bytes;
+
+	LOGP(DUDP_TEST, LOGL_NOTICE, "received datagram: ");
+
+	if (!msg) {
+		LOGPC(DUDP_TEST, LOGL_ERROR, "can't allocate message\n");
+		return NULL;
+	}
+
+	/* receive message: */
+	bytes = osmo_dgram_recv(conn, msg);
+	if (bytes < 0) {
+		LOGPC(DUDP_TEST, LOGL_ERROR, "can't receive message: %u\n", -bytes);
+		msgb_free(msg);
+		return NULL;
+	}
+
+	/* process message: */
+	LOGPC(DUDP_TEST, LOGL_NOTICE, "[%u] %s\n", bytes, msgb_hexdump(msg));
+
+	return msg;
+}
+
+static inline bool dgram_init(const char *host, uint16_t lport, uint16_t rport, void *read_cb)
+{
+	const struct log_info_cat udp_test_cat[] = {
+		[DUDP_TEST] = {
+			.name = "DUDP_TEST",
+			.description = "UDP test",
+			.color = "\033[1;35m",
+			.enabled = 1, .loglevel = LOGL_NOTICE,
+		},
+	};
+
+	const struct log_info udp_test_log_info = {
+		.filter_fn = NULL,
+		.cat = udp_test_cat,
+		.num_cat = ARRAY_SIZE(udp_test_cat),
+	};
+
+	signal(SIGINT, sighandler);
+
+	tall_test = talloc_named_const(NULL, 1, "udp_test");
+
+	osmo_init_logging(&udp_test_log_info);
+	log_set_log_level(osmo_stderr_target, LOGL_NOTICE);
+
+	conn = osmo_dgram_create(tall_test);
+	if (!conn) {
+		LOGP(DUDP_TEST, LOGL_ERROR, "cannot create UDP socket\n");
+		return false;
+	}
+
+	osmo_dgram_set_local_addr(conn, host);
+	osmo_dgram_set_local_port(conn, lport);
+	osmo_dgram_set_remote_addr(conn, host);
+	osmo_dgram_set_remote_port(conn, rport);
+	osmo_dgram_set_read_cb(conn, read_cb);
+
+	if (osmo_dgram_open(conn) < 0) {
+		LOGP(DUDP_TEST, LOGL_ERROR, "cannot open client connection %s:%u -> %s:%u\n", host, lport, host, rport);
+		return false;
+	}
+
+	return true;
+}
+
+static inline void main_loop(const char *host, uint16_t lport, uint16_t rport)
+{
+	LOGP(DUDP_TEST, LOGL_NOTICE, "Entering main loop: %s:%u -> %s:%u\n", host, lport, host, rport);
+
+	while(please_dont_die)
+		osmo_select_main(0);
+}
+
+/* Smart message trimmer:
+ * for all positive i trims msg to i - 1
+ * for i = 0 trims msg to 0
+ * for all positive x adds x to msg
+*/
+/*! Smart message trimmer.
+ *  \param[in] msg message buffer
+ *  \param[in] i trim value: for all positive i, msg is trimmed to i - 1, otherwise msg is trimmed to 0
+ *  \param[in] x message content: for all positive x, x is added to msg, otherwise it's ignored
+ */
+static inline bool mtrim(struct msgb *msg, uint8_t i, uint8_t x)
+{
+	if (msgb_trim(msg, i ? i - 1 : i) != 0) {
+		LOGP(DLINP, LOGL_ERROR, "failed to trim message by %u\n", i);
+		return false;
+	}
+
+	if (x)
+		msgb_put_u8(msg, x);
+
+	return true;
+}