laforge has submitted this change. (
https://gerrit.osmocom.org/c/libosmocore/+/32014 )
Change subject: Fix parsing of TLV_TYPE_SINGLE_TV
......................................................................
Fix parsing of TLV_TYPE_SINGLE_TV
The decoding path of TLV_TYPE_SINGLE_TV is wrong, since it is not
shifting right the tag before using it. On the other hand, the encoding
path (tlv_encode_one) is doing that, so it is clear there's a bug.
It seems that in order to workaround the bug some IEs in gsm_04_08.h (TS
24.008 and TS 44.018) were defined incorrectly (eg 0x80) while the spec
clearly assigns eg. "8" to it, and makes sure no full byte IEI collides.
Some other IEIs like GSM48_IE_GMM_CIPH_CKSN which are also of the same
type were already correctly defined as 0x08.
Change-Id: I799e35dc8d4d153fa63bf50563a5482cdf4de2d7
---
M TODO-RELEASE
M include/osmocom/gsm/protocol/gsm_04_08.h
M src/gsm/gsm48.c
M src/gsm/tlv_parser.c
4 files changed, 39 insertions(+), 12 deletions(-)
Approvals:
Jenkins Builder: Verified
fixeria: Looks good to me, but someone else must approve
laforge: Looks good to me, approved
diff --git a/TODO-RELEASE b/TODO-RELEASE
index 8ecd7a6..2935a81 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -7,4 +7,5 @@
# If any interfaces have been added since the last public release: c:r:a + 1.
# If any interfaces have been removed or changed since the last public
release: c:r:0.
#library what description / commit summary line
-libosmogsm new header osmocom/gsm/protocol/gsm_44_060.h
\ No newline at end of file
+libosmogsm new header osmocom/gsm/protocol/gsm_44_060.h
+libosmocore ADD new defines in osmocom/gsm/protocol/gsm_04_08.h (old ones
marked deprecated)
\ No newline at end of file
diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h
b/include/osmocom/gsm/protocol/gsm_04_08.h
index 66aa135..7b8979b 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -1734,6 +1734,10 @@
#define GSM48_IE_FRQSHORT_AFTER 0x02
#define GSM48_IE_MUL_RATE_CFG 0x03 /* 10.5.2.21aa */
#define GSM48_IE_FREQ_L_AFTER 0x05
+#define GSM48_IE_GROUP_CIP_SEQ_HO 0x08 /* HO = Half Octet Tag */
+#define GSM48_IE_CIP_MODE_SET_HO 0x09 /* HO = Half Octet Tag */
+#define GSM48_IE_GPRS_RESUMPT_HO 0xc0 /* HO = Half Octet Tag */
+#define GSM48_IE_SYNC_IND_HO 0x0d /* HO = Half Octet Tag */
#define GSM48_IE_MSLOT_DESC 0x10
#define GSM48_IE_CHANMODE_2 0x11
#define GSM48_IE_FRQSHORT_BEFORE 0x12
@@ -1775,20 +1779,21 @@
#define GSM48_IE_START_TIME 0x7c
#define GSM48_IE_INDIVIDUAL_PRIORITIES 0x7c /* 44.018 Section 9.1.7 */
#define GSM48_IE_TIMING_ADVANCE 0x7d
-#define GSM48_IE_GROUP_CIP_SEQ 0x80
-#define GSM48_IE_CIP_MODE_SET 0x90
-#define GSM48_IE_GPRS_RESUMPT 0xc0
-#define GSM48_IE_SYNC_IND 0xd0
+#define GSM48_IE_GROUP_CIP_SEQ 0x80 /* DEPRECATED, use
GSM48_IE_GROUP_CIP_SEQ_HO instead */
+#define GSM48_IE_CIP_MODE_SET 0x90 /* DEPRECATED, use
GSM48_IE_CIP_MODE_SET_HO instead */
+#define GSM48_IE_GPRS_RESUMPT 0xc0 /* DEPRECATED, use
GSM48_IE_GPRS_RESUMPT_HO instead */
+#define GSM48_IE_SYNC_IND 0xd0 /* DEPRECATED, use GSM48_IE_SYNC_IND_HO
instead */
/* System Information 4 (types are equal IEs above) */
#define GSM48_IE_CBCH_CHAN_DESC 0x64
#define GSM48_IE_CBCH_MOB_AL 0x72
/* Additional MM elements */
+#define GSM48_IE_PRIORITY_LEV_HO 0x08 /* HO = Half Octet Tag */
#define GSM48_IE_LOCATION_AREA 0x13
#define GSM48_IE_AUTN 0x20
#define GSM48_IE_AUTH_RES_EXT 0x21
#define GSM48_IE_AUTS 0x22
-#define GSM48_IE_PRIORITY_LEV 0x80
+#define GSM48_IE_PRIORITY_LEV 0x80 /* DEPRECATED, use
GSM48_IE_PRIORITY_LEV_HO instead */
#define GSM48_IE_FOLLOW_ON_PROC 0xa1
#define GSM48_IE_CTS_PERMISSION 0xa2
diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c
index 919500b..1657864 100644
--- a/src/gsm/gsm48.c
+++ b/src/gsm/gsm48.c
@@ -129,10 +129,10 @@
[GSM48_IE_REALTIME_DIFF] = { TLV_TYPE_TLV },
[GSM48_IE_START_TIME] = { TLV_TYPE_FIXED, 2 },
[GSM48_IE_TIMING_ADVANCE] = { TLV_TYPE_TV },
- [GSM48_IE_GROUP_CIP_SEQ] = { TLV_TYPE_SINGLE_TV },
- [GSM48_IE_CIP_MODE_SET] = { TLV_TYPE_SINGLE_TV },
- [GSM48_IE_GPRS_RESUMPT] = { TLV_TYPE_SINGLE_TV },
- [GSM48_IE_SYNC_IND] = { TLV_TYPE_SINGLE_TV },
+ [GSM48_IE_GROUP_CIP_SEQ_HO] = { TLV_TYPE_SINGLE_TV },
+ [GSM48_IE_CIP_MODE_SET_HO] = { TLV_TYPE_SINGLE_TV },
+ [GSM48_IE_GPRS_RESUMPT_HO] = { TLV_TYPE_SINGLE_TV },
+ [GSM48_IE_SYNC_IND_HO] = { TLV_TYPE_SINGLE_TV },
},
};
@@ -148,7 +148,7 @@
[GSM48_IE_NET_DST] = { TLV_TYPE_TLV },
[GSM48_IE_LOCATION_AREA] = { TLV_TYPE_FIXED, 5 },
- [GSM48_IE_PRIORITY_LEV] = { TLV_TYPE_SINGLE_TV },
+ [GSM48_IE_PRIORITY_LEV_HO] = { TLV_TYPE_SINGLE_TV },
[GSM48_IE_FOLLOW_ON_PROC] = { TLV_TYPE_T },
[GSM48_IE_CTS_PERMISSION] = { TLV_TYPE_T },
},
diff --git a/src/gsm/tlv_parser.c b/src/gsm/tlv_parser.c
index de76688..e47b94f 100644
--- a/src/gsm/tlv_parser.c
+++ b/src/gsm/tlv_parser.c
@@ -241,7 +241,9 @@
*o_tag = tag;
/* single octet TV IE */
- if (def->def[tag & 0xf0].type == TLV_TYPE_SINGLE_TV) {
+ if (def->def[tag >> 4].type == TLV_TYPE_SINGLE_TV
+ /* backward compat for old IEs with half-octet tag defined as 0xN0:
*/
+ || ((tag > 0x0f) && (def->def[tag & 0xf0].type ==
TLV_TYPE_SINGLE_TV))) {
*o_tag = tag & 0xf0;
*o_val = buf;
*o_len = 1;
--
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I799e35dc8d4d153fa63bf50563a5482cdf4de2d7
Gerrit-Change-Number: 32014
Gerrit-PatchSet: 3
Gerrit-Owner: pespin <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <[email protected]>
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-MessageType: merged
