res_hep_{pjsip|rtcp}: Decline module loads if res_hep had not loaded

A crash can occur in res_hep_pjsip or res_hep_rtcp if res_hep has not
loaded and does not have a configuration file. Previously when this
occurred, checks were put in to see if the configuration was loaded
successfully. While this is a good idea - and has been added to the
offending function in res_hep - the reality is res_hep_pjsip and
res_hep_rtcp have no business running if res_hep isn't also running.

As such, this patch also adds a function to res_hep that returns whether
or not it successfully loaded. Oddly enough, ast_module_check returns
"everything is peachy" even if a module declined its load - so it cannot
be solely relied on. res_hep_pjsip and res_hep_rtcp now also check this
function to see if they should continue to load; if it fails, they
decline their load as well.

ASTERISK-26096 #close

Change-Id: I007e535fcc2e51c2ca48534f48c5fc2ac38935ea

1 files changed, 5 insertions, 0 deletions

diff --git a/res/res_hep_pjsip.c b/res/res_hep_pjsip.c
index 0cc54c237..a3a93e9b2 100644
--- a/res/res_hep_pjsip.c
+++ b/res/res_hep_pjsip.c
@@ -210,6 +210,11 @@ static int load_module(void)
 {
 	CHECK_PJSIP_MODULE_LOADED();
 
+	if (!ast_module_check("res_hep.so") || !hepv3_is_loaded()) {
+		ast_log(AST_LOG_WARNING, "res_hep is not loaded or running; declining module load\n");
+		return AST_MODULE_LOAD_DECLINE;
+	}
+
 	ast_sip_register_service(&logging_module);
 	return AST_MODULE_LOAD_SUCCESS;
 }