Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 676 insertions, 0 deletions

diff --git a/plugins/epan/falco_bridge/packet-falco-bridge.c b/plugins/epan/falco_bridge/packet-falco-bridge.c
new file mode 100644
index 0000000..81dbc6c
--- /dev/null
+++ b/plugins/epan/falco_bridge/packet-falco-bridge.c
@@ -0,0 +1,676 @@
+/* packet-falco-bridge.c
+ *
+ * By Loris Degioanni
+ * Copyright (C) 2021 Sysdig, Inc.
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+// To do:
+// - Convert this to C++? It would let us get rid of the glue that is
+//   sinsp-span and make string handling a lot easier. However,
+//   epan/address.h and driver/ppm_events_public.h both define PT_NONE.
+// - Add a configuration preference for configure_plugin?
+// - Add a configuration preference for individual conversation filters vs ANDing them?
+//   We would need to add deregister_(|log_)conversation_filter before we implement this.
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#include <dlfcn.h>
+#endif
+
+#include <epan/exceptions.h>
+#include <epan/packet.h>
+#include <epan/proto.h>
+#include <epan/proto_data.h>
+#include <epan/conversation.h>
+#include <epan/conversation_filter.h>
+#include <epan/tap.h>
+#include <epan/stat_tap_ui.h>
+
+#include <wsutil/file_util.h>
+#include <wsutil/filesystem.h>
+#include <wsutil/inet_addr.h>
+#include <wsutil/report_message.h>
+
+#include "sinsp-span.h"
+
+typedef enum bridge_field_flags_e {
+    BFF_NONE = 0,
+    BFF_HIDDEN = 1 << 1, // Unused
+    BFF_INFO = 1 << 2,
+    BFF_CONVERSATION = 1 << 3
+} bridge_field_flags_e;
+
+typedef struct conv_filter_info {
+    hf_register_info *field_info;
+    bool is_present;
+    wmem_strbuf_t *strbuf;
+} conv_filter_info;
+
+typedef struct bridge_info {
+    sinsp_source_info_t *ssi;
+    uint32_t source_id;
+    int proto;
+    hf_register_info* hf;
+    int* hf_ids;
+    hf_register_info* hf_v4;
+    int *hf_v4_ids;
+    hf_register_info* hf_v6;
+    int *hf_v6_ids;
+    int* hf_id_to_addr_id; // Maps an hf offset to an hf_v[46] offset
+    uint32_t visible_fields;
+    uint32_t* field_flags;
+    int* field_ids;
+    uint32_t num_conversation_filters;
+    conv_filter_info *conversation_filters;
+} bridge_info;
+
+static int proto_falco_bridge = -1;
+static gint ett_falco_bridge = -1;
+static gint ett_sinsp_span = -1;
+static gint ett_address = -1;
+static dissector_table_t ptype_dissector_table;
+
+static int dissect_falco_bridge(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data);
+static int dissect_sinsp_span(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_);
+
+/*
+ * Array of plugin bridges
+ */
+bridge_info* bridges = NULL;
+guint nbridges = 0;
+guint n_conv_fields = 0;
+
+/*
+ * sinsp extractor span
+ */
+sinsp_span_t *sinsp_span = NULL;
+
+/*
+ * Fields
+ */
+static int hf_sdp_source_id_size = -1;
+static int hf_sdp_lengths = -1;
+static int hf_sdp_source_id = -1;
+
+static hf_register_info hf[] = {
+    { &hf_sdp_source_id_size,
+        { "Plugin ID size", "falcobridge.id.size",
+        FT_UINT32, BASE_DEC,
+        NULL, 0x0,
+        NULL, HFILL }
+    },
+    { &hf_sdp_lengths,
+        { "Field Lengths", "falcobridge.lens",
+        FT_UINT32, BASE_DEC,
+        NULL, 0x0,
+        NULL, HFILL }
+    },
+    { &hf_sdp_source_id,
+        { "Plugin ID", "falcobridge.id",
+        FT_UINT32, BASE_DEC,
+        NULL, 0x0,
+        NULL, HFILL }
+    },
+};
+
+// Returns true if the field might contain an IPv4 or IPv6 address.
+// XXX This should probably be a preference.
+static bool is_addr_field(const char *abbrev) {
+    if (strstr(abbrev, ".srcip")) { // ct.srcip
+        return true;
+    } else if (strstr(abbrev, ".client.ip")) { // okta.client.ip
+        return true;
+    }
+    return false;
+}
+
+static gboolean
+is_filter_valid(packet_info *pinfo, void *cfi_ptr)
+{
+    conv_filter_info *cfi = (conv_filter_info *)cfi_ptr;
+
+    if (!cfi->is_present) {
+        return FALSE;
+    }
+
+    int proto_id = proto_registrar_get_parent(cfi->field_info->hfinfo.id);
+
+    if (proto_id < 0) {
+        return false;
+    }
+
+    return proto_is_frame_protocol(pinfo->layers, proto_registrar_get_nth(proto_id)->abbrev);
+}
+
+static gchar*
+build_filter(packet_info *pinfo _U_, void *cfi_ptr)
+{
+    conv_filter_info *cfi = (conv_filter_info *)cfi_ptr;
+
+    if (!cfi->is_present) {
+        return FALSE;
+    }
+
+    return ws_strdup_printf("%s eq %s", cfi->field_info->hfinfo.abbrev, cfi->strbuf->str);
+}
+
+void
+configure_plugin(bridge_info* bi, char* config _U_)
+{
+    /*
+     * Initialize the plugin
+     */
+    bi->source_id = get_sinsp_source_id(bi->ssi);
+
+    size_t tot_fields = get_sinsp_source_nfields(bi->ssi);
+    bi->visible_fields = 0;
+    uint32_t addr_fields = 0;
+    sinsp_field_info_t sfi;
+    bi->num_conversation_filters = 0;
+
+    for (size_t j = 0; j < tot_fields; j++) {
+        get_sinsp_source_field_info(bi->ssi, j, &sfi);
+        if (sfi.is_hidden) {
+            /*
+             * Skip the fields that are marked as hidden.
+             * XXX Should we keep them and call proto_item_set_hidden?
+             */
+            continue;
+        }
+        if (sfi.type == SFT_STRINGZ && is_addr_field(sfi.abbrev)) {
+            addr_fields++;
+        }
+        bi->visible_fields++;
+
+        if (sfi.is_conversation) {
+            bi->num_conversation_filters++;
+        }
+    }
+
+    if (bi->visible_fields) {
+        bi->hf = (hf_register_info*)wmem_alloc(wmem_epan_scope(), bi->visible_fields * sizeof(hf_register_info));
+        bi->hf_ids = (int*)wmem_alloc(wmem_epan_scope(), bi->visible_fields * sizeof(int));
+        bi->field_ids = (int*)wmem_alloc(wmem_epan_scope(), bi->visible_fields * sizeof(int));
+        bi->field_flags = (guint32*)wmem_alloc(wmem_epan_scope(), bi->visible_fields * sizeof(guint32));
+
+        if (addr_fields) {
+            bi->hf_id_to_addr_id = (int *)wmem_alloc(wmem_epan_scope(), bi->visible_fields * sizeof(int));
+            bi->hf_v4 = (hf_register_info*)wmem_alloc(wmem_epan_scope(), addr_fields * sizeof(hf_register_info));
+            bi->hf_v4_ids = (int*)wmem_alloc(wmem_epan_scope(), addr_fields * sizeof(int));
+            bi->hf_v6 = (hf_register_info*)wmem_alloc(wmem_epan_scope(), addr_fields * sizeof(hf_register_info));
+            bi->hf_v6_ids = (int*)wmem_alloc(wmem_epan_scope(), addr_fields * sizeof(int));
+        }
+
+        if (bi->num_conversation_filters) {
+            bi->conversation_filters = (conv_filter_info *)wmem_alloc(wmem_epan_scope(), bi->num_conversation_filters * sizeof (conv_filter_info));
+        }
+
+        uint32_t fld_cnt = 0;
+        size_t conv_fld_cnt = 0;
+        uint32_t addr_fld_cnt = 0;
+
+        for (size_t j = 0; j < tot_fields; j++)
+        {
+            bi->hf_ids[fld_cnt] = -1;
+            bi->field_ids[fld_cnt] = (int) j;
+            bi->field_flags[fld_cnt] = BFF_NONE;
+            hf_register_info* ri = bi->hf + fld_cnt;
+
+            get_sinsp_source_field_info(bi->ssi, j, &sfi);
+
+            if (sfi.is_hidden) {
+                /*
+                 * Skip the fields that are marked as hidden
+                 */
+                continue;
+            }
+
+            enum ftenum ftype;
+            int fdisplay = BASE_NONE;
+            switch (sfi.type) {
+            case SFT_STRINGZ:
+                ftype = FT_STRINGZ;
+                break;
+            case SFT_UINT64:
+                ftype = FT_UINT64;
+                switch (sfi.display_format) {
+                case SFDF_DECIMAL:
+                    fdisplay = BASE_DEC;
+                    break;
+                case SFDF_HEXADECIMAL:
+                    fdisplay = BASE_HEX;
+                    break;
+                case SFDF_OCTAL:
+                    fdisplay = BASE_OCT;
+                    break;
+                default:
+                    THROW_FORMATTED(DissectorError, "error in plugin %s: display format %s is not supported",
+                        get_sinsp_source_name(bi->ssi),
+                        sfi.abbrev);
+                }
+                break;
+            default:
+                THROW_FORMATTED(DissectorError, "error in plugin %s: type of field %s is not supported",
+                    get_sinsp_source_name(bi->ssi),
+                    sfi.abbrev);
+            }
+
+            hf_register_info finfo = {
+                bi->hf_ids + fld_cnt,
+                {
+                    wmem_strdup(wmem_epan_scope(), sfi.display), wmem_strdup(wmem_epan_scope(), sfi.abbrev),
+                    ftype, fdisplay,
+                    NULL, 0x0,
+                    wmem_strdup(wmem_epan_scope(), sfi.description), HFILL
+                }
+            };
+            *ri = finfo;
+
+            if (sfi.is_conversation) {
+                bi->field_flags[fld_cnt] |= BFF_CONVERSATION;
+                bi->conversation_filters[conv_fld_cnt].field_info = ri;
+                bi->conversation_filters[conv_fld_cnt].strbuf = wmem_strbuf_new(wmem_epan_scope(), "");
+
+                const char *source_name = get_sinsp_source_name(bi->ssi);
+                const char *conv_filter_name = wmem_strdup_printf(wmem_epan_scope(), "%s %s", source_name, ri->hfinfo.name);
+                register_log_conversation_filter(source_name, conv_filter_name, is_filter_valid, build_filter, &bi->conversation_filters[conv_fld_cnt]);
+                if (conv_fld_cnt == 0) {
+                    add_conversation_filter_protocol(source_name);
+                }
+                conv_fld_cnt++;
+            }
+
+            if (sfi.is_info) {
+                bi->field_flags[fld_cnt] |= BFF_INFO;
+            }
+
+            if (sfi.type == SFT_STRINGZ && is_addr_field(sfi.abbrev)) {
+                bi->hf_id_to_addr_id[fld_cnt] = addr_fld_cnt;
+
+                bi->hf_v4_ids[addr_fld_cnt] = -1;
+                hf_register_info* ri_v4 = bi->hf_v4 + addr_fld_cnt;
+                hf_register_info finfo_v4 = {
+                    bi->hf_v4_ids + addr_fld_cnt,
+                    {
+                        wmem_strdup_printf(wmem_epan_scope(), "%s (IPv4)", sfi.display),
+                        wmem_strdup_printf(wmem_epan_scope(), "%s.v4", sfi.abbrev),
+                        FT_IPv4, BASE_NONE,
+                        NULL, 0x0,
+                        wmem_strdup_printf(wmem_epan_scope(), "%s (IPv4)", sfi.description), HFILL
+                    }
+                };
+                *ri_v4 = finfo_v4;
+
+                bi->hf_v6_ids[addr_fld_cnt] = -1;
+                hf_register_info* ri_v6 = bi->hf_v6 + addr_fld_cnt;
+                hf_register_info finfo_v6 = {
+                    bi->hf_v6_ids + addr_fld_cnt,
+                    {
+                        wmem_strdup_printf(wmem_epan_scope(), "%s (IPv6)", sfi.display),
+                        wmem_strdup_printf(wmem_epan_scope(), "%s.v6", sfi.abbrev),
+                        FT_IPv4, BASE_NONE,
+                        NULL, 0x0,
+                        wmem_strdup_printf(wmem_epan_scope(), "%s (IPv6)", sfi.description), HFILL
+                    }
+                };
+                *ri_v6 = finfo_v6;
+                addr_fld_cnt++;
+            } else if (bi->hf_id_to_addr_id) {
+                bi->hf_id_to_addr_id[fld_cnt] = -1;
+            }
+            fld_cnt++;
+        }
+        proto_register_field_array(proto_falco_bridge, bi->hf, fld_cnt);
+        if (addr_fld_cnt) {
+            proto_register_field_array(proto_falco_bridge, bi->hf_v4, addr_fld_cnt);
+            proto_register_field_array(proto_falco_bridge, bi->hf_v6, addr_fld_cnt);
+        }
+    }
+}
+
+void
+import_plugin(char* fname)
+{
+    nbridges++;
+    bridge_info* bi = &bridges[nbridges - 1];
+
+    char *err_str = create_sinsp_source(sinsp_span, fname, &(bi->ssi));
+    if (err_str) {
+        nbridges--;
+        report_failure("Unable to load sinsp plugin %s: %s.", fname, err_str);
+        g_free(err_str);
+        return;
+    }
+
+    configure_plugin(bi, "");
+
+    const char *source_name = get_sinsp_source_name(bi->ssi);
+    const char *plugin_name = g_strdup_printf("%s Plugin", source_name);
+    bi->proto = proto_register_protocol (
+        plugin_name,       /* full name */
+        source_name,       /* short name  */
+        source_name        /* filter_name */
+        );
+
+    static dissector_handle_t ct_handle;
+    ct_handle = create_dissector_handle(dissect_sinsp_span, bi->proto);
+    dissector_add_uint("falcobridge.id", bi->source_id, ct_handle);
+}
+
+static void
+on_wireshark_exit(void)
+{
+    // XXX This currently crashes in a sinsp thread.
+    // destroy_sinsp_span(sinsp_span);
+    sinsp_span = NULL;
+}
+
+void
+proto_register_falcoplugin(void)
+{
+    proto_falco_bridge = proto_register_protocol (
+        "Falco Bridge", /* name       */
+        "Falco Bridge", /* short name */
+        "falcobridge"   /* abbrev     */
+        );
+    register_dissector("falcobridge", dissect_falco_bridge, proto_falco_bridge);
+
+    /*
+     * Create the dissector table that we will use to route the dissection to
+     * the appropriate Falco plugin.
+     */
+    ptype_dissector_table = register_dissector_table("falcobridge.id",
+        "Falco Bridge Plugin ID", proto_falco_bridge, FT_UINT32, BASE_DEC);
+
+    /*
+     * Load the plugins
+     */
+    WS_DIR *dir;
+    WS_DIRENT *file;
+    char *filename;
+    char *spdname = g_build_filename(get_plugins_dir_with_version(), "falco", NULL);
+    char *ppdname = g_build_filename(get_plugins_pers_dir_with_version(), "falco", NULL);
+
+    /*
+     * We scan the plugins directory twice. The first time we count how many
+     * plugins we have, which we need to know in order to allocate the right
+     * amount of memory. The second time we actually load and configure
+     * each plugin.
+     */
+    if ((dir = ws_dir_open(spdname, 0, NULL)) != NULL) {
+        while ((ws_dir_read_name(dir)) != NULL) {
+            nbridges++;
+        }
+        ws_dir_close(dir);
+    }
+
+    if ((dir = ws_dir_open(ppdname, 0, NULL)) != NULL) {
+        while ((ws_dir_read_name(dir)) != NULL) {
+            nbridges++;
+        }
+        ws_dir_close(dir);
+    }
+
+    sinsp_span = create_sinsp_span();
+
+    bridges = g_new0(bridge_info, nbridges);
+    nbridges = 0;
+
+    if ((dir = ws_dir_open(spdname, 0, NULL)) != NULL) {
+        while ((file = ws_dir_read_name(dir)) != NULL) {
+            filename = g_build_filename(spdname, ws_dir_get_name(file), NULL);
+            import_plugin(filename);
+            g_free(filename);
+        }
+        ws_dir_close(dir);
+    }
+
+    if ((dir = ws_dir_open(ppdname, 0, NULL)) != NULL) {
+        while ((file = ws_dir_read_name(dir)) != NULL) {
+            filename = g_build_filename(ppdname, ws_dir_get_name(file), NULL);
+            import_plugin(filename);
+            g_free(filename);
+        }
+        ws_dir_close(dir);
+    }
+
+    g_free(spdname);
+    g_free(ppdname);
+
+    /*
+     * Setup protocol subtree array
+     */
+    static gint *ett[] = {
+        &ett_falco_bridge,
+        &ett_sinsp_span,
+        &ett_address,
+    };
+
+    proto_register_field_array(proto_falco_bridge, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    register_shutdown_routine(on_wireshark_exit);
+}
+
+static bridge_info*
+get_bridge_info(guint32 source_id)
+{
+    for(guint j = 0; j < nbridges; j++)
+    {
+        if(bridges[j].source_id == source_id)
+        {
+            return &bridges[j];
+        }
+    }
+
+    return NULL;
+}
+
+static int
+dissect_falco_bridge(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "Falco Bridge");
+    /* Clear out stuff in the info column */
+    col_clear(pinfo->cinfo,COL_INFO);
+
+    // https://github.com/falcosecurity/libs/blob/9c942f27/userspace/libscap/scap.c#L1900
+    proto_item *ti = proto_tree_add_item(tree, proto_falco_bridge, tvb, 0, 12, ENC_NA);
+    proto_tree *fb_tree = proto_item_add_subtree(ti, ett_falco_bridge);
+    proto_tree_add_item(fb_tree, hf_sdp_source_id_size, tvb, 0, 4, ENC_LITTLE_ENDIAN);
+    proto_tree_add_item(fb_tree, hf_sdp_lengths, tvb, 4, 4, ENC_LITTLE_ENDIAN);
+    proto_item *idti = proto_tree_add_item(fb_tree, hf_sdp_source_id, tvb, 8, 4, ENC_LITTLE_ENDIAN);
+
+    guint32 source_id = tvb_get_guint32(tvb, 8, ENC_LITTLE_ENDIAN);
+    bridge_info* bi = get_bridge_info(source_id);
+    col_add_fstr(pinfo->cinfo, COL_INFO, "Plugin ID: %u", source_id);
+
+    if (bi == NULL) {
+        proto_item_append_text(idti, " (NOT SUPPORTED)");
+        col_append_str(pinfo->cinfo, COL_INFO, " (NOT SUPPORTED)");
+        return tvb_captured_length(tvb);
+    }
+
+    const char *source_name = get_sinsp_source_name(bi->ssi);
+    proto_item_append_text(idti, " (%s)", source_name);
+    col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", source_name);
+
+    dissector_handle_t dissector = dissector_get_uint_handle(ptype_dissector_table, source_id);
+    if (dissector) {
+        tvbuff_t* next_tvb = tvb_new_subset_length(tvb, 12, tvb_captured_length(tvb) - 12);
+        call_dissector_with_data(dissector, next_tvb, pinfo, tree, bi);
+    }
+
+    return tvb_captured_length(tvb);
+}
+
+static int
+dissect_sinsp_span(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* bi_ptr)
+{
+    bridge_info* bi = (bridge_info *) bi_ptr;
+    guint plen = tvb_captured_length(tvb);
+    const char *source_name = get_sinsp_source_name(bi->ssi);
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, source_name);
+    /* Clear out stuff in the info column */
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    proto_item* ti = proto_tree_add_item(tree, bi->proto, tvb, 0, plen, ENC_NA);
+    proto_tree* fb_tree = proto_item_add_subtree(ti, ett_sinsp_span);
+
+    guint8* payload = (guint8*)tvb_get_ptr(tvb, 0, plen);
+
+    sinsp_field_extract_t *sinsp_fields = (sinsp_field_extract_t*) wmem_alloc(pinfo->pool, sizeof(sinsp_field_extract_t) * bi->visible_fields);
+    for (uint32_t fld_idx = 0; fld_idx < bi->visible_fields; fld_idx++) {
+        header_field_info* hfinfo = &(bi->hf[fld_idx].hfinfo);
+        sinsp_field_extract_t *sfe = &sinsp_fields[fld_idx];
+
+        sfe->field_id = bi->field_ids[fld_idx];
+        sfe->field_name = hfinfo->abbrev;
+        sfe->type = hfinfo->type == FT_STRINGZ ? SFT_STRINGZ : SFT_UINT64;
+    }
+
+    // If we have a failure, try to dissect what we can first, then bail out with an error.
+    bool rc = extract_sisnp_source_fields(bi->ssi, payload, plen, pinfo->pool, sinsp_fields, bi->visible_fields);
+
+    if (!rc) {
+        REPORT_DISSECTOR_BUG("Falco plugin %s extract error: %s", get_sinsp_source_name(bi->ssi), get_sinsp_source_last_error(bi->ssi));
+    }
+
+    for (uint32_t idx = 0; idx < bi->num_conversation_filters; idx++) {
+        bi->conversation_filters[idx].is_present = false;
+        wmem_strbuf_truncate(bi->conversation_filters[idx].strbuf, 0);
+    }
+
+    conversation_element_t *first_conv_els = NULL; // hfid + field val + CONVERSATION_LOG
+
+    for (uint32_t fld_idx = 0; fld_idx < bi->visible_fields; fld_idx++) {
+        sinsp_field_extract_t *sfe = &sinsp_fields[fld_idx];
+        header_field_info* hfinfo = &(bi->hf[fld_idx].hfinfo);
+
+        if (!sfe->is_present) {
+            continue;
+        }
+
+        conv_filter_info *cur_conv_filter = NULL;
+        conversation_element_t *cur_conv_els = NULL;
+        if ((bi->field_flags[fld_idx] & BFF_CONVERSATION) != 0) {
+            for (uint32_t cf_idx = 0; cf_idx < bi->num_conversation_filters; cf_idx++) {
+                if (&(bi->conversation_filters[cf_idx].field_info)->hfinfo == hfinfo) {
+                    cur_conv_filter = &bi->conversation_filters[cf_idx];
+                    if (!first_conv_els) {
+                        first_conv_els = wmem_alloc0(pinfo->pool, sizeof(conversation_element_t) * 3);
+                        first_conv_els[0].type = CE_INT;
+                        first_conv_els[0].int_val = hfinfo->id;
+                        cur_conv_els = first_conv_els;
+                    }
+                    break;
+                }
+            }
+        }
+
+
+        if (sfe->type == SFT_STRINGZ && hfinfo->type == FT_STRINGZ) {
+            proto_item *pi = proto_tree_add_string(fb_tree, bi->hf_ids[fld_idx], tvb, 0, plen, sfe->res_str);
+            if (bi->field_flags[fld_idx] & BFF_INFO) {
+                col_append_sep_fstr(pinfo->cinfo, COL_INFO, ", ", "%s", sfe->res_str);
+                // Mark it hidden, otherwise we end up with a bunch of empty "Info" tree items.
+                proto_item_set_hidden(pi);
+            }
+
+            int addr_fld_idx = bi->hf_id_to_addr_id[fld_idx];
+            if (addr_fld_idx >= 0) {
+                ws_in4_addr v4_addr;
+                ws_in6_addr v6_addr;
+                proto_tree *addr_tree;
+                proto_item *addr_item = NULL;
+                if (ws_inet_pton4(sfe->res_str, &v4_addr)) {
+                    addr_tree = proto_item_add_subtree(pi, ett_address);
+                    addr_item = proto_tree_add_ipv4(addr_tree, bi->hf_v4_ids[addr_fld_idx], tvb, 0, 0, v4_addr);
+                    set_address(&pinfo->net_src, AT_IPv4, sizeof(ws_in4_addr), &v4_addr);
+                } else if (ws_inet_pton6(sfe->res_str, &v6_addr)) {
+                    addr_tree = proto_item_add_subtree(pi, ett_address);
+                    addr_item = proto_tree_add_ipv6(addr_tree, bi->hf_v6_ids[addr_fld_idx], tvb, 0, 0, &v6_addr);
+                    set_address(&pinfo->net_src, AT_IPv6, sizeof(ws_in6_addr), &v6_addr);
+                }
+                if (addr_item) {
+                    proto_item_set_generated(addr_item);
+                }
+                if (cur_conv_filter) {
+                    wmem_strbuf_append(cur_conv_filter->strbuf, sfe->res_str);
+                    cur_conv_filter->is_present = true;
+                }
+                if (cur_conv_els) {
+                    cur_conv_els[1].type = CE_ADDRESS;
+                    copy_address(&cur_conv_els[1].addr_val, &pinfo->net_src);
+                }
+            } else {
+                if (cur_conv_filter) {
+                    wmem_strbuf_append_printf(cur_conv_filter->strbuf, "\"%s\"", sfe->res_str);
+                    cur_conv_filter->is_present = true;
+                }
+                if (cur_conv_els) {
+                    cur_conv_els[1].type = CE_STRING;
+                    cur_conv_els[1].str_val = wmem_strdup(pinfo->pool, sfe->res_str);
+                }
+            }
+        }
+        else if (sfe->type == SFT_UINT64 && hfinfo->type == FT_UINT64) {
+            proto_tree_add_uint64(fb_tree, bi->hf_ids[fld_idx], tvb, 0, plen, sfe->res_u64);
+            if (cur_conv_filter) {
+                switch (hfinfo->display) {
+                case BASE_HEX:
+                    wmem_strbuf_append_printf(cur_conv_filter->strbuf, "%" PRIx64, sfe->res_u64);
+                    break;
+                case BASE_OCT:
+                    wmem_strbuf_append_printf(cur_conv_filter->strbuf, "%" PRIo64, sfe->res_u64);
+                    break;
+                default:
+                    wmem_strbuf_append_printf(cur_conv_filter->strbuf, "%" PRId64, sfe->res_u64);
+                }
+                cur_conv_filter->is_present = true;
+            }
+
+            if (cur_conv_els) {
+                cur_conv_els[1].type = CE_UINT64;
+                cur_conv_els[1].uint64_val = sfe->res_u64;
+            }
+        }
+        else {
+            REPORT_DISSECTOR_BUG("Field %s has an unrecognized or mismatched type %u != %u",
+                hfinfo->abbrev, sfe->type, hfinfo->type);
+        }
+    }
+
+    if (!rc) {
+        REPORT_DISSECTOR_BUG("Falco plugin %s extract error", get_sinsp_source_name(bi->ssi));
+    }
+
+    if (first_conv_els) {
+        first_conv_els[2].type = CE_CONVERSATION_TYPE;
+        first_conv_els[2].conversation_type_val = CONVERSATION_LOG;
+        pinfo->conv_elements = first_conv_els;
+//        conversation_t *conv = find_or_create_conversation(pinfo);
+//        if (!conv) {
+//            conversation_new_full(pinfo->fd->num, pinfo->conv_elements);
+//        }
+    }
+
+    return plen;
+}
+
+void
+proto_reg_handoff_sdplugin(void)
+{
+}