1 files changed, 143 insertions, 0 deletions
diff --git a/epan/dissectors/packet-mpeg-ca.c b/epan/dissectors/packet-mpeg-ca.c
new file mode 100644
index 00000000..96d9042d
--- /dev/null
+++ b/epan/dissectors/packet-mpeg-ca.c
@@ -0,0 +1,143 @@
+/* packet-mpeg-ca.c
+ * Routines for MPEG2 (ISO/ISO 13818-1) Conditional Access Table (CA) dissection
+ * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include "packet-mpeg-sect.h"
+#include "packet-mpeg-descriptor.h"
+
+void proto_register_mpeg_ca(void);
+void proto_reg_handoff_mpeg_ca(void);
+
+static dissector_handle_t mpeg_ca_handle;
+
+static int proto_mpeg_ca = -1;
+static int hf_mpeg_ca_reserved = -1;
+static int hf_mpeg_ca_version_number = -1;
+static int hf_mpeg_ca_current_next_indicator = -1;
+static int hf_mpeg_ca_section_number = -1;
+static int hf_mpeg_ca_last_section_number = -1;
+
+static gint ett_mpeg_ca = -1;
+
+#define MPEG_CA_RESERVED_MASK                   0xFFFFC0
+#define MPEG_CA_VERSION_NUMBER_MASK             0x00003E
+#define MPEG_CA_CURRENT_NEXT_INDICATOR_MASK     0x000001
+
+static int
+dissect_mpeg_ca(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    guint offset = 0, length = 0;
+
+    proto_item *ti;
+    proto_tree *mpeg_ca_tree;
+
+    /* The TVB should start right after the section_length in the Section packet */
+
+    col_set_str(pinfo->cinfo, COL_INFO, "Conditional Access Table (CA)");
+
+    ti = proto_tree_add_item(tree, proto_mpeg_ca, tvb, offset, -1, ENC_NA);
+    mpeg_ca_tree = proto_item_add_subtree(ti, ett_mpeg_ca);
+
+    offset += packet_mpeg_sect_header(tvb, offset, mpeg_ca_tree, &length, NULL);
+    length -= 4;
+
+    proto_tree_add_item(mpeg_ca_tree, hf_mpeg_ca_reserved, tvb, offset, 3, ENC_BIG_ENDIAN);
+    proto_tree_add_item(mpeg_ca_tree, hf_mpeg_ca_version_number, tvb, offset, 3, ENC_BIG_ENDIAN);
+    proto_tree_add_item(mpeg_ca_tree, hf_mpeg_ca_current_next_indicator, tvb, offset, 3, ENC_BIG_ENDIAN);
+    offset += 3;
+
+    proto_tree_add_item(mpeg_ca_tree, hf_mpeg_ca_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset += 1;
+
+    proto_tree_add_item(mpeg_ca_tree, hf_mpeg_ca_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset += 1;
+
+    /* Parse all the programs */
+    while (offset < length)
+        offset += proto_mpeg_descriptor_dissect(tvb, offset, mpeg_ca_tree);
+
+    offset += packet_mpeg_sect_crc(tvb, pinfo, mpeg_ca_tree, 0, offset);
+
+    proto_item_set_len(ti, offset);
+    return tvb_captured_length(tvb);
+}
+
+
+void
+proto_register_mpeg_ca(void)
+{
+
+    static hf_register_info hf[] = {
+
+        { &hf_mpeg_ca_reserved, {
+            "Reserved", "mpeg_ca.reserved",
+            FT_UINT24, BASE_HEX, NULL, MPEG_CA_RESERVED_MASK,
+                        NULL, HFILL
+        } },
+
+        { &hf_mpeg_ca_version_number, {
+            "Version Number", "mpeg_ca.version",
+            FT_UINT24, BASE_HEX, NULL, MPEG_CA_VERSION_NUMBER_MASK,
+                        NULL, HFILL
+        } },
+
+        { &hf_mpeg_ca_current_next_indicator, {
+            "Current/Next Indicator", "mpeg_ca.cur_next_ind",
+            FT_BOOLEAN, 24, TFS(&tfs_current_not_yet), MPEG_CA_CURRENT_NEXT_INDICATOR_MASK,
+                        NULL, HFILL
+        } },
+
+        { &hf_mpeg_ca_section_number, {
+            "Section Number", "mpeg_ca.sect_num",
+            FT_UINT8, BASE_DEC, NULL, 0,
+                        NULL, HFILL
+        } },
+
+        { &hf_mpeg_ca_last_section_number, {
+            "Last Section Number", "mpeg_ca.last_sect_num",
+            FT_UINT8, BASE_DEC, NULL, 0,
+                        NULL, HFILL
+        } },
+
+    };
+
+    static gint *ett[] = {
+        &ett_mpeg_ca,
+    };
+
+    proto_mpeg_ca = proto_register_protocol("MPEG2 Conditional Access Table", "MPEG CA", "mpeg_ca");
+
+    proto_register_field_array(proto_mpeg_ca, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    mpeg_ca_handle = register_dissector("mpeg_ca", dissect_mpeg_ca, proto_mpeg_ca);
+}
+
+
+void proto_reg_handoff_mpeg_ca(void)
+{
+    dissector_add_uint("mpeg_sect.tid", MPEG_CA_TID, mpeg_ca_handle);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */