--devel=debugFlush

some more verbose output for people curious about network flushing

net_io.c

@@ -1453,6 +1453,18 @@ static int flushClient(struct client *c, int64_t now) {
         modesCloseClient(c);
         return -1;
     }
+    if (bytesWritten > toWrite) {
+        fprintf(stderr, "%s: send() weirdness: bytesWritten > toWrite: %s: %s port %s (fd %d, SendQ %d, RecvQ %d)\n",
+                c->service->descr, strerror(err), c->host, c->port,
+                c->fd, c->sendq_len, c->buflen);
+        modesCloseClient(c);
+        return -1;
+    }
+    if (bytesWritten < toWrite && Modes.debug_flush) {
+
+        fprintTimePrecise(stderr, now);
+        fprintf(stderr, " %s: send wrote: %d/%d bytes (%s port %s fd %d, SendQ %d)\n", c->service->descr, bytesWritten, toWrite, c->host, c->port, c->fd, c->sendq_len);
+    }
     if (bytesWritten > 0) {
         Modes.stats_current.network_bytes_out += bytesWritten;
         // Advance buffer

readsb.c

@@ -1932,6 +1932,9 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
                 if (strcasecmp(token[0], "debugPlanefinder") == 0) {
                     Modes.debug_planefinder = 1;
                 }
+                if (strcasecmp(token[0], "debugFlush") == 0) {
+                    Modes.debug_flush = 1;
+                }
                 if (strcasecmp(token[0], "omitGlobeFiles") == 0) {
                     Modes.omitGlobeFiles = 1;
                 }

readsb.h

@@ -639,6 +639,7 @@ struct _Modes
     int8_t mode_ac; // Enable decoding of SSR Modes A & C
     int8_t mode_ac_auto; // allow toggling of A/C by Beast commands
     int8_t debug_net;
+    int8_t debug_flush;
     int8_t debug_no_discard;
     int8_t debug_nextra;
     int8_t debug_cpr;