diff options
Diffstat (limited to 'src/gsm/tlv_parser.c')
| -rw-r--r-- | src/gsm/tlv_parser.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/gsm/tlv_parser.c b/src/gsm/tlv_parser.c index 9b1fb17a..b8c7149f 100644 --- a/src/gsm/tlv_parser.c +++ b/src/gsm/tlv_parser.c @@ -276,8 +276,13 @@ int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def, &buf[ofs], buf_len-ofs); if (rv < 0) return rv; - dec->lv[tag].val = val; - dec->lv[tag].len = len; + /* Most GSM related protocols clearly indicate that in case of duplicate + * IEs, only the first occurrence shall be used, while any further occurrences + * shall be ignored. See e.g. 3GPP TS 24.008 Section 8.6.3 */ + if (dec->lv[tag].val == NULL) { + dec->lv[tag].val = val; + dec->lv[tag].len = len; + } ofs += rv; num_parsed++; } |