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e1: change security settings only if parameters present

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If the Bearer Context Modification Request does not contain security
information, the PDCP entity shall keep the currently configured security
settings.

Passing -1 for ciphering_algorithm and integrity_algorithm is the way
to implement this logic.
This commit is contained in:
Cedric Roux
2025-01-22 16:11:00 +01:00
parent e84adc6057
commit 181762978c
1 changed files with 10 additions and 4 deletions
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14
openair2/LAYER2/nr_pdcp/cucp_cuup_handler.c
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@@ -274,10 +274,16 @@ void e1_bearer_context_modif(const e1ap_bearer_mod_req_t *req)
if (to_modif->pdcp_config.pDCP_Reestablishment) {
nr_pdcp_entity_security_keys_and_algos_t security_parameters;
security_parameters.ciphering_algorithm = req->cipheringAlgorithm;
security_parameters.integrity_algorithm = req->integrityProtectionAlgorithm;
memcpy(security_parameters.ciphering_key, req->encryptionKey, NR_K_KEY_SIZE);
memcpy(security_parameters.integrity_key, req->integrityProtectionKey, NR_K_KEY_SIZE);
if (req->has_security_information) {
security_parameters.ciphering_algorithm = req->cipheringAlgorithm;
security_parameters.integrity_algorithm = req->integrityProtectionAlgorithm;
memcpy(security_parameters.ciphering_key, req->encryptionKey, NR_K_KEY_SIZE);
memcpy(security_parameters.integrity_key, req->integrityProtectionKey, NR_K_KEY_SIZE);
} else {
/* don't change security settings if not present in the Bearer Context Modification Request */
security_parameters.ciphering_algorithm = -1;
security_parameters.integrity_algorithm = -1;
}
nr_pdcp_reestablishment(req->gNB_cu_up_ue_id,
to_modif->id,
false,