diff options
| author | Jacob Erlbeck <jerlbeck@sysmocom.de> | 2015-05-15 15:50:43 +0200 |
|---|---|---|
| committer | Jacob Erlbeck <jerlbeck@sysmocom.de> | 2015-05-21 17:10:42 +0200 |
| commit | 939904672961fa7e28397e27f942a7d1fff4bbdf (patch) | |
| tree | f17d491b73f8c54982da96a2431b45e8d98f6000 /src/gprs_ms.h | |
| parent | e43460b50fc152026ab96b5095b94fbac6939ab2 (diff) | |
ms: Support new and old TLLIs
According to the specification (GSM 04.08/24.008, 4.7.1.5) after a
new P-TMSI has been assigned, the old P-TMSI must be kept basically
until it has been used by both sides. Since the TLLI will be derived
from the P-TMSI, the old TLLI must also be kept until the new TLLI
has been used by both MS and SGSN.
This commit modifies the TLLI handling of GprsMs accordingly.
set_tlli() is only used with TLLIs derived from MS messages,
confirm_tlli() is used with TLLIs derived from messages received from
the SGSN. tlli() returns the value set by the MS. check_tlli()
matches each of the TLLI used by either MS or SGSN as well as the old
TLLI until it has been confirmed.
Sponsored-by: On-Waves ehf
Diffstat (limited to 'src/gprs_ms.h')
| -rw-r--r-- | src/gprs_ms.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/gprs_ms.h b/src/gprs_ms.h index 3a8a2e17..ac1928e7 100644 --- a/src/gprs_ms.h +++ b/src/gprs_ms.h @@ -51,8 +51,10 @@ public: gprs_rlcmac_ul_tbf *ul_tbf() const {return m_ul_tbf;} gprs_rlcmac_dl_tbf *dl_tbf() const {return m_dl_tbf;} - uint32_t tlli() const {return m_tlli;} + uint32_t tlli() const; void set_tlli(uint32_t tlli); + bool confirm_tlli(uint32_t tlli); + bool check_tlli(uint32_t tlli); void attach_tbf(gprs_rlcmac_tbf *tbf); void attach_ul_tbf(gprs_rlcmac_ul_tbf *tbf); @@ -78,7 +80,20 @@ private: gprs_rlcmac_ul_tbf *m_ul_tbf; gprs_rlcmac_dl_tbf *m_dl_tbf; uint32_t m_tlli; + uint32_t m_new_ul_tlli; + uint32_t m_new_dl_tlli; bool m_is_idle; int m_ref; LListHead<GprsMs> m_list; }; + +inline uint32_t GprsMs::tlli() const +{ + return m_new_ul_tlli ? m_new_ul_tlli : m_tlli; +} + +inline bool GprsMs::check_tlli(uint32_t tlli) +{ + return tlli != 0 && + (tlli == m_tlli || tlli == m_new_ul_tlli || tlli == m_new_dl_tlli); +} |