packet IO support inject packet and add inject packet stat

src/packet_io/dumpfile_io.cpp

@@ -274,6 +274,32 @@ void dumpfile_io_drop(struct dumpfile_io *handle, uint16_t thr_idx, struct packe
     }
 }
 
+int dumpfile_io_inject(struct dumpfile_io *handle, uint16_t thr_idx, struct packet *pkts, int nr_pkts)
+{
+    int len;
+    struct packet *pkt = NULL;
+    struct io_stat *stat = &handle->stat[thr_idx];
+
+    for (int i = 0; i < nr_pkts; i++)
+    {
+        pkt = &pkts[i];
+        len = packet_get_len(pkt);
+
+        stat->inject_pkts++;
+        stat->inject_bytes += len;
+
+        stat->raw_tx_pkts++;
+        stat->raw_tx_bytes += len;
+
+        stat->dev_tx_pkts++;
+        stat->dev_tx_bytes += len;
+
+        packet_free(pkt);
+    }
+
+    return nr_pkts;
+}
+
 void dumpfile_io_yield(struct dumpfile_io *handle, uint16_t thr_idx, uint64_t timeout_ms)
 {
     return;