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[MME] Add protection code for INVALID S1AP (#2184)

This commit is contained in:
Sukchan Lee 2023-03-23 20:50:41 +09:00
parent df25013e54
commit 84e46a0ff1
1 changed files with 9 additions and 1 deletions
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10
src/mme/emm-handler.c
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@ -56,7 +56,15 @@ int emm_handle_attach_request(mme_ue_t *mme_ue,
ogs_assert(enb_ue);
ogs_assert(esm_message_container);
ogs_assert(esm_message_container->length);
if (!esm_message_container->length) {
ogs_error("No ESM Message Container");
r = nas_eps_send_attach_reject(mme_ue,
OGS_NAS_EMM_CAUSE_SEMANTICALLY_INCORRECT_MESSAGE,
OGS_NAS_ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED);
ogs_expect(r == OGS_OK);
ogs_assert(r != OGS_ERROR);
return OGS_ERROR;
}
ogs_assert(pkbuf);
ogs_assert(pkbuf->data);