+#ifdef NDEBUG
+#undef NDEBUG
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "../src/meshlink.h"
+#include "utils.h"
+
+static bool received_large;
+static bool received_zero;
+static size_t received;
+static struct sync_flag accept_flag;
+static struct sync_flag close_flag;
+
+static void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ (void)mesh;
+
+ if(!data && !len) {
+ meshlink_channel_close(mesh, channel);
+ set_sync_flag(&close_flag, true);
+ }
+
+ if(len >= 2) {
+ uint16_t checklen;
+ memcpy(&checklen, data, sizeof(checklen));
+ assert(len == checklen);
+ }
+
+ if(len == 65535) {
+ received_large = true;
+ }
+
+ if(len == 0) {
+ received_zero = true;
+ }
+
+ received += len;
+}
+
+static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
+ assert(port == 1);
+ assert(!data);
+ assert(!len);
+ assert(meshlink_channel_get_flags(mesh, channel) == (MESHLINK_CHANNEL_TCP | MESHLINK_CHANNEL_FRAMED));
+ meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
+ set_sync_flag(&accept_flag, true);
+
+ return true;
+}
+
+int main(void) {
+ meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
+
+ // Open two meshlink instances
+
+ meshlink_handle_t *mesh_a, *mesh_b;
+ open_meshlink_pair(&mesh_a, &mesh_b, "channels_framed");
+ start_meshlink_pair(mesh_a, mesh_b);
+
+ // Create a channel from a to b
+
+ meshlink_set_channel_accept_cb(mesh_b, accept_cb);
+
+ meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
+ assert(b);
+
+ meshlink_channel_t *channel = meshlink_channel_open_ex(mesh_a, b, 1, NULL, NULL, 0, MESHLINK_CHANNEL_TCP | MESHLINK_CHANNEL_FRAMED);
+ assert(channel);
+
+ size_t sndbuf_size = 128 * 1024;
+ meshlink_set_channel_sndbuf(mesh_a, channel, sndbuf_size);
+
+ // Check that we cannot send more than 65535 bytes without errors
+
+ char data[65535] = "";
+ assert(meshlink_channel_send(mesh_a, channel, data, 65536) == -1);
+
+ // Check that we can send 65535 bytes
+
+ uint16_t framelen = 65535;
+ memcpy(data, &framelen, sizeof(framelen));
+ assert(meshlink_channel_send(mesh_a, channel, data, framelen) == framelen);
+
+ // Check that we can send zero bytes
+
+ assert(meshlink_channel_send(mesh_a, channel, data, 0) == 0);
+
+ // Send randomly sized frames from a to b
+
+ size_t total_len = framelen;
+
+ for(int j = 0; j < 2500; j++) {
+ framelen = rand() % 2048;
+ memcpy(data, &framelen, sizeof(framelen));
+
+ while(meshlink_channel_get_sendq(mesh_a, channel) > sndbuf_size - framelen - 2) {
+ const struct timespec req = {0, 2000000};
+ clock_nanosleep(CLOCK_MONOTONIC, 0, &req, NULL);
+ }
+
+ assert(meshlink_channel_send(mesh_a, channel, data, framelen) == framelen);
+ total_len += framelen;
+ }
+
+ // Closes the channel and wait for the other end to closes it as well
+
+ meshlink_channel_close(mesh_a, channel);
+ assert(wait_sync_flag(&close_flag, 10));
+
+ // Check that the clients have received all the data we sent
+
+ assert(received == total_len);
+ assert(received_large);
+ assert(received_zero);
+
+ close_meshlink_pair(mesh_a, mesh_b);
+
+ return 0;
+}