1 files changed, 84 insertions, 0 deletions
diff --git a/src/reader.cpp b/src/reader.cpp
new file mode 100644
index 0000000..dae5376
--- /dev/null
+++ b/src/reader.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2017-2024 OARC, Inc.
+ * Copyright (c) 2011-2017, IIS - The Internet Foundation in Sweden
+ * All rights reserved.
+ *
+ * This file is part of PacketQ.
+ *
+ * PacketQ is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PacketQ is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PacketQ.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "reader.h"
+#include "packet_handler.h"
+
+namespace packetq {
+
+void Reader::seek_to_start()
+{
+    currently_reading = filenames.begin();
+    pcap.reset();
+    packets_read = 0;
+}
+
+bool Reader::done()
+{
+    return (!pcap && currently_reading == filenames.end()) || (max_packets > 0 && packets_read >= max_packets);
+}
+
+bool Reader::read_next(Packet_handler* handler, const std::vector<int>& columns, Row& destination_row, int skip_packets)
+{
+    bool filled_in_row = false;
+
+    while (!filled_in_row and !done()) {
+        // try opening pcap file
+        if (!pcap && currently_reading != filenames.end()) {
+            FILE* fp = fopen(currently_reading->c_str(), "rb");
+            if (fp) {
+                pcap.reset(new Pcap_file(fp, Pcap_file::TAKE_OVER_FP));
+
+                if (!pcap->get_header())
+                    pcap.reset();
+            }
+
+            if (!pcap)
+                ++currently_reading;
+        }
+
+        // try reading a row
+        if (pcap) {
+            int            len, s, us;
+            unsigned char* data         = pcap->get_packet(len, s, us);
+            bool           read_success = len && data;
+            ++packets_read; // we count all packets
+            if (read_success) {
+                Packet              packet(data, len, s, us, packets_read, pcap->get_link_layer_type());
+                Packet::ParseResult res = packet.parse(handler, columns, destination_row, skip_packets == 0);
+
+                if (res == Packet::NOT_SAMPLED)
+                    --skip_packets;
+
+                filled_in_row = res == Packet::OK;
+            } else {
+                // last row in file
+                pcap.reset();
+                if (currently_reading != filenames.end())
+                    ++currently_reading;
+            }
+        }
+    }
+
+    return filled_in_row;
+}
+
+} // namespace packetq