diff options
author | Jacob Erlbeck <jerlbeck@sysmocom.de> | 2014-09-22 10:42:05 +0200 |
---|---|---|
committer | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2014-10-09 17:48:37 +0200 |
commit | 9c65c8116fac1c99ba6eeb380e2cced26fbb5052 (patch) | |
tree | b475712ea64f65869fd79db8c353ffb4aa8dd304 /openbsc/src/gprs/gprs_gb_parse.c | |
parent | 2bf326186a01a65762d73034975017d515eb4a01 (diff) |
gbproxy: Parse Attach Reject messages
That message is currently ignored but should invalidate the TLLI and
de-register the logical link instead.
This patch extends the parser to recognize such messages and to set
the invalidate_tlli flag.
Sponsored-by: On-Waves ehf
Diffstat (limited to 'openbsc/src/gprs/gprs_gb_parse.c')
-rw-r--r-- | openbsc/src/gprs/gprs_gb_parse.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_gb_parse.c b/openbsc/src/gprs/gprs_gb_parse.c index 2baaa069c..a0a4469b3 100644 --- a/openbsc/src/gprs/gprs_gb_parse.c +++ b/openbsc/src/gprs/gprs_gb_parse.c @@ -219,6 +219,23 @@ static int gprs_gb_parse_gmm_attach_ack(uint8_t *data, size_t data_len, return 1; } +static int gprs_gb_parse_gmm_attach_rej(uint8_t *data, size_t data_len, + struct gprs_gb_parse_context *parse_ctx) +{ + uint8_t *value; + + parse_ctx->llc_msg_name = "ATTACH_REJ"; + + /* GMM cause */ + if (v_fixed_shift(&data, &data_len, 1, &value) <= 0) + return 0; + + parse_ctx->invalidate_tlli = 1; + + return 1; +} + + static int gprs_gb_parse_gmm_detach_req(uint8_t *data, size_t data_len, struct gprs_gb_parse_context *parse_ctx) { @@ -442,6 +459,9 @@ int gprs_gb_parse_dtap(uint8_t *data, size_t data_len, case GSM48_MT_GMM_ATTACH_REQ: return gprs_gb_parse_gmm_attach_req(data, data_len, parse_ctx); + case GSM48_MT_GMM_ATTACH_REJ: + return gprs_gb_parse_gmm_attach_rej(data, data_len, parse_ctx); + case GSM48_MT_GMM_ATTACH_ACK: return gprs_gb_parse_gmm_attach_ack(data, data_len, parse_ctx); |