mirror of https://github.com/PentHertz/srsLTE.git
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
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@ -3863,6 +3863,8 @@ typedef struct{
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}LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT;
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// Functions
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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,
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uint8 sec_hdr_type,
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uint32 count,
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LIBLTE_BYTE_MSG_STRUCT *msg);
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LIBLTE_ERROR_ENUM liblte_mme_unpack_modify_eps_bearer_context_accept_msg(LIBLTE_BYTE_MSG_STRUCT *msg,
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LIBLTE_MME_MODIFY_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT *mod_eps_bearer_context_accept);
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@ -10394,6 +10394,8 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_esm_status_msg(LIBLTE_BYTE_MSG_STRUCT
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Document Reference: 24.301 v10.2.0 Section 8.3.16
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*********************************************************************/
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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,
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uint8 sec_hdr_type,
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uint32 count,
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LIBLTE_BYTE_MSG_STRUCT *msg)
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{
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LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
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@ -10402,6 +10404,19 @@ LIBLTE_ERROR_ENUM liblte_mme_pack_modify_eps_bearer_context_accept_msg(LIBLTE_MM
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if(mod_eps_bearer_context_accept != NULL &&
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msg != NULL)
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{
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if (LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS != sec_hdr_type) {
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// Protocol Discriminator and Security Header Type
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*msg_ptr = (sec_hdr_type << 4) | (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
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msg_ptr++;
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// MAC will be filled in later
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msg_ptr += 4;
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// Sequence Number
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*msg_ptr = count & 0xFF;
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msg_ptr++;
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}
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// Protocol Discriminator and EPS Bearer ID
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*msg_ptr = (mod_eps_bearer_context_accept->eps_bearer_id << 4) | (LIBLTE_MME_PD_EPS_SESSION_MANAGEMENT);
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msg_ptr++;
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@ -10663,6 +10678,15 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_modify_eps_bearer_context_request_msg(LIBLTE
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if(msg != NULL &&
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mod_eps_bearer_context_req != NULL)
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{
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// Security Header Type
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uint8_t sec_hdr_type = (msg->msg[0] & 0xF0) >> 4;
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if(LIBLTE_MME_SECURITY_HDR_TYPE_PLAIN_NAS == sec_hdr_type)
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{
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msg_ptr++;
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}else{
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msg_ptr += 6;
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}
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// EPS Bearer ID
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mod_eps_bearer_context_req->eps_bearer_id = (*msg_ptr >> 4);
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msg_ptr++;
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