- for (i = 0; i < nf->n_fds; i++) {
- if (send(nf->fds[i], nf->packet.data, nf->packet.size, 0) == -1) {
- VLOG_WARN_RL(&rl, "netflow message send failed: %s",
- strerror(errno));
- }
+ /* NetFlow v5 records are limited to 32-bit counters. If we've
+ * wrapped a counter, send as multiple records so we don't lose
+ * track of any traffic. We try to evenly distribute the packet and
+ * byte counters, so that the bytes-per-packet lengths don't look
+ * wonky across the records. */
+ while (byte_delta) {
+ int n_recs = (byte_delta + UINT32_MAX - 1) / UINT32_MAX;
+ uint32_t pkt_count = pkt_delta / n_recs;
+ uint32_t byte_count = byte_delta / n_recs;
+
+ gen_netflow_rec(nf, nf_flow, expired, pkt_count, byte_count);
+
+ pkt_delta -= pkt_count;
+ byte_delta -= byte_count;