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gtp: Add net GTP cause values and a function to check for success 

According to the spec the upf/pgw can accept a modified pdp context from
the request e.g. if an ipv4/6 context was requested, but only ipv4 is
availiable. Introduce a function that checks all cause values that are
considered successful.

See also: 3GPP TS 29.060 Ch 7.3.2

Related: OS#6268
Change-Id: I9c3bf64537ef2223e29f8082861fa32fde26bf68
This commit is contained in:
Daniel Willmann 2023-11-21 17:10:41 +01:00
parent 08bb5182a4
commit a625bdd136
1 changed files with 10 additions and 1 deletions
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11
gtp/gtp.h
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@ -103,7 +103,9 @@ static inline const char *gtp_type_name(uint8_t val)
#define GTPCAUSE_049 49 /* Cause values reserved for GPRS charging protocol use (See GTP' in GSM 12.15) 49-63 */
#define GTPCAUSE_064 64 /* For future use 64-127 */
#define GTPCAUSE_ACC_REQ 128 /* Request accepted */
#define GTPCAUSE_129 129 /* For future use 129-176 */
#define GTPCAUSE_NEW_PDP_NET_PREF 129 /* New PDP type due to network preference */
#define GTPCAUSE_NEW_PDP_ADDR_BEAR 130 /* New PDP type due to single address bearer only */
#define GTPCAUSE_131 131 /* For future use 131-176 */
#define GTPCAUSE_177 177 /* Cause values reserved for GPRS charging protocol use (See GTP' In GSM 12.15) 177-191 */
#define GTPCAUSE_NON_EXIST 192 /* Non-existent */
#define GTPCAUSE_INVALID_MESSAGE 193 /* Invalid message format */
@ -137,6 +139,13 @@ static inline const char *gtp_type_name(uint8_t val)
#define GTPCAUSE_221 221 /* For Future Use 221-240 */
#define GTPCAUSE_241 241 /* Cause Values Reserved For Gprs Charging Protocol Use (See Gtp' In Gsm 12.15) 241-255 */
static inline bool gtp_cause_successful(uint8_t cause)
{
return cause == GTPCAUSE_ACC_REQ ||
cause == GTPCAUSE_NEW_PDP_NET_PREF ||
cause == GTPCAUSE_NEW_PDP_ADDR_BEAR;
}
struct ul66_t;
struct ul16_t;
struct pdp_t;