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srsLTE
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liblte_mme: fix packing and unpacking of modify EPS bearer context 

this just skips the security bits but the packing/unpacking of
the values, i.e. new TFT may still be wrong
This commit is contained in:
Andre Puschmann 2019-06-03 14:50:44 +02:00
parent dcb04c6461
commit f357c995fc
2 changed files with 26 additions and 0 deletions
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2
lib/include/srslte/asn1/liblte_mme.h
View File

@ -3863,6 +3863,8 @@ typedef struct{
}LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT;
// Functions
LIBLTE_ERROR_ENUM liblte_mme_pack_modify_eps_bearer_context_accept_msg(LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *mod_eps_bearer_context_accept,
uint8 sec_hdr_type,
uint32 count,
LIBLTE_BYTE_MSG_STRUCT *msg);
LIBLTE_ERROR_ENUM liblte_mme_unpack_modify_eps_bearer_context_accept_msg(LIBLTE_BYTE_MSG_STRUCT *msg,
LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *mod_eps_bearer_context_accept);

24
lib/src/asn1/liblte_mme.cc
View File

@ -10394,6 +10394,8 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_esm_status_msg(LIBLTE_BYTE_MSG_STRUCT
Document Reference: 24.301 v10.2.0 Section 8.3.16
*********************************************************************/
LIBLTE_ERROR_ENUM liblte_mme_pack_modify_eps_bearer_context_accept_msg(LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *mod_eps_bearer_context_accept,
uint8 sec_hdr_type,
uint32 count,
LIBLTE_BYTE_MSG_STRUCT *msg)
{
LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
@ -10402,6 +10404,19 @@ LIBLTE_ERROR_ENUM liblte_mme_pack_modify_eps_bearer_context_accept_msg(LIBLTE_MM
if(mod_eps_bearer_context_accept != NULL &&
msg != NULL)
{
if (LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS != sec_hdr_type) {
// Protocol Discriminator and Security Header Type
*msg_ptr = (sec_hdr_type << 4) | (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
msg_ptr++;
// MAC will be filled in later
msg_ptr += 4;
// Sequence Number
*msg_ptr = count & 0xFF;
msg_ptr++;
}
// Protocol Discriminator and EPS Bearer ID
*msg_ptr = (mod_eps_bearer_context_accept->eps_bearer_id << 4) | (LIBLTE_MME_PD_EPS_SESSION_MANAGEMENT);
msg_ptr++;
@ -10663,6 +10678,15 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_modify_eps_bearer_context_request_msg(LIBLTE
if(msg != NULL &&
mod_eps_bearer_context_req != NULL)
{
// Security Header Type
uint8_t sec_hdr_type = (msg->msg[0] & 0xF0) >> 4;
if(LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS == sec_hdr_type)
{
msg_ptr++;
}else{
msg_ptr += 6;
}
// EPS Bearer ID
mod_eps_bearer_context_req->eps_bearer_id = (*msg_ptr >> 4);
msg_ptr++;