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gbproxy: Restart IMSI acquisition on RA UDP REQ 

Currently the IMSI acquisition is not restarted when a RA Update
Request is received. This leads to repeated N(U) in the generated
Ident Request message, which in turn causes the MS to drop the
second of these message. This is bad, when the first Ident Response
has been lost between MS and gbproxy.

This patch changes gbproxy_imsi_acquisition() to handle RA Update
Request messages like Attach Requests.

Sponsored-by: On-Waves ehf
This commit is contained in:
Jacob Erlbeck 2014-09-18 10:08:27 +02:00 committed by Holger Hans Peter Freyther
parent 2ec2757def
commit e27ab916d6
2 changed files with 8 additions and 3 deletions
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5
openbsc/src/gprs/gb_proxy.c
View File

@ -395,12 +395,13 @@ static int gbproxy_imsi_acquisition(struct gbproxy_peer *peer,
if (parse_ctx->g48_hdr)
switch (parse_ctx->g48_hdr->msg_type)
{
case GSM48_MT_GMM_RA_UPD_REQ:
case GSM48_MT_GMM_ATTACH_REQ:
if (gbproxy_restart_imsi_acquisition(tlli_info)) {
LOGP(DLLC, LOGL_INFO,
"NSEI=%d(BSS) IMSI acquisition was in progress "
"when receiving an ATTACH_REQ.\n",
msgb_nsei(msg));
"when receiving an %s.\n",
msgb_nsei(msg), parse_ctx->llc_msg_name);
}
break;
case GSM48_MT_GMM_DETACH_REQ:

6
openbsc/tests/gbproxy/gbproxy_test.ok
View File

@ -3568,6 +3568,10 @@ PROCESSING RA UPD REQ from 0x01020304:1111
CALLBACK, event 0, msg length 85, bvci 0x1002
00 00 10 02 01 80 00 de ad 00 00 04 08 88 00 f1 99 00 63 60 70 80 00 80 0e 00 3e 01 c0 35 08 08 10 11 22 33 40 50 60 1d 19 13 42 33 57 2b f7 c8 48 02 13 48 50 c8 48 02 14 48 50 c8 48 02 17 49 10 c8 48 02 00 19 8b b2 92 17 16 27 07 04 31 02 e5 e0 32 02 20 00 ac 9c 37
NS UNITDATA MESSAGE to BSS, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
MESSAGE to BSS at 0x01020304:1111, msg length 28
00 00 10 02 00 80 00 de ad 00 50 20 16 82 02 58 0e 00 09 41 c4 05 08 15 01 8f 47 9e
result (RA UPD REQ) = 0
PROCESSING DETACH REQ from 0x01020304:1111
@ -3578,7 +3582,7 @@ CALLBACK, event 0, msg length 44, bvci 0x1002
NS UNITDATA MESSAGE to BSS, BVCI 0x1002, msg length 24 (gprs_ns_sendmsg)
MESSAGE to BSS at 0x01020304:1111, msg length 28
00 00 10 02 00 80 00 de ad 00 50 20 16 82 02 58 0e 00 09 41 c4 01 08 06 00 11 f5 c0
00 00 10 02 00 80 00 de ad 00 50 20 16 82 02 58 0e 00 09 41 c4 05 08 06 00 29 4a 68
result (DETACH REQ) = 0