1 files changed, 105 insertions, 0 deletions

diff --git a/src/fnettrace/event.c b/src/fnettrace/event.c
new file mode 100644
index 000000000..f4ccf5360
--- /dev/null
+++ b/src/fnettrace/event.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2014-2023 Firejail Authors
+ *
+ * This file is part of firejail project
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include "fnettrace.h"
+
+typedef struct event_t {
+        struct event_t *next;
+        char *record;
+} Event;
+
+static Event *event = NULL;
+static Event *last_event = NULL;
+int ev_cnt = 0;
+
+void ev_clear(void) {
+        ev_cnt = 0;
+        Event *ev = event;
+        while (ev) {
+                Event *next = ev->next;
+                free(ev->record);
+                free(ev);
+                ev = next;
+        }
+        event = NULL;
+}
+
+void ev_add(char *record) {
+        assert(record);
+
+        // braking recursivity
+        if (*record == '\0')
+                return;
+
+        char *ptr = strchr(record, '\n');
+        if (ptr)
+                *ptr = '\0';
+
+        // filter out duplicates
+        if (event && strcmp(event->record, record) == 0)
+                return;
+
+        Event *ev = malloc(sizeof(Event));
+        if (!ev)
+                errExit("malloc");
+        memset(ev, 0, sizeof(Event));
+
+        ev->record = strdup(record);
+        if (!ev->record)
+                errExit("strdup");
+
+        if (event == NULL) {
+                event = ev;
+                last_event = ev;
+        }
+        else {
+                last_event->next = ev;
+                last_event = ev;
+        }
+        ev_cnt++;
+
+        // recursivity
+        if (ptr)
+                ev_add(++ptr);
+}
+
+void ev_print(FILE *fp) {
+        assert(fp);
+
+        Event *ev = event;
+        while (ev) {
+                fprintf(fp, "   ");
+                if (strstr(ev->record, "NXDOMAIN")) {
+                        if (fp == stdout)
+                                ansi_red(ev->record);
+                        else
+                                fprintf(fp, "%s", ev->record);
+                }
+                else if (strstr(ev->record, "SSH connection")) {
+                        if (fp == stdout)
+                                ansi_red(ev->record);
+                        else
+                                fprintf(fp, "%s", ev->record);
+                }
+                else
+                        fprintf(fp, "%s", ev->record);
+                fprintf(fp, "\n");
+                ev = ev->next;
+        }
+}