src: introduce abi_breakage()

Changes in the netlink attribute layout is considered to be a kernel ABI
breakage, so report this immediately and stop execution, instead of lazy
error back to the client application, which cannot do anything with
this.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index 2cbf79e..4011ad6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -154,3 +154,10 @@ const struct nfnl_handle *nfct_nfnlh(struct nfct_handle *cth)
 /**
  * @}
  */
+
+void __noreturn __abi_breakage(const char *file, int line, const char *reason)
+{
+	fprintf(stderr, "ctnetlink kernel ABI is broken, contact your vendor.\n"
+			"%s:%d reason: %s\n", file, line, reason);
+	exit(EXIT_FAILURE);
+}