1 files changed, 25 insertions, 0 deletions
diff --git a/src/tailnet.h b/src/tailnet.h
new file mode 100644
index 0000000..8e7c8a6
--- /dev/null
+++ b/src/tailnet.h
@@ -0,0 +1,25 @@
+#ifndef TAILNET_H
+#define TAILNET_H
+
+#include <stdbool.h>
+
+#define DEFINE_PROGRAM_LIST(...)                                               \
+  static const char *REQUIRED_PROGS[] = {__VA_ARGS__};                         \
+  static const int REQUIRED_PROGS_COUNT =                                      \
+      sizeof(REQUIRED_PROGS) / sizeof(REQUIRED_PROGS[0]);
+
+#define PROG_TAILSCALE "tailscale"
+#define PROG_SYSCTL "sysctl"
+#define PROG_UFW "ufw"
+#define PROG_CURL "curl"
+#define PROG_NFT "nft"
+#define MAX_PROG_COUNT                                                         \
+  10 // this is here cause of C99 array sizes compile time constraints
+
+extern const char *tailnetMissingProgs[MAX_PROG_COUNT];
+bool tailnet_is_program_installed_boolean(const char *program_name);
+bool tailnet_is_file_executable_boolean(const char *filepath);
+bool tailnet_check_required_programs_boolean(void);
+bool tailnet_advertise_exit_node_boolean(void);
+
+#endif