diff options
| author | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-10-22 11:47:45 +0200 |
|---|---|---|
| committer | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-10-27 04:52:29 +0100 |
| commit | e81a6109f9e94ec5dcceb44a7ef1ea8cc52e7cb1 (patch) | |
| tree | 3c7ad640e5837f2d6aae78d72b73ddf748eff02f /openbsc/src/gsm_04_08_utils.c | |
| parent | 55aac6e868d4f3b565bba310598104c53c53da0a (diff) | |
[gsm48] Add generation of ASSIGNMENT COMMAND to the 0408 utils
Add code to generate an assignment command for a given lchan. It
is expected that the lchan is modified already and the mode will
be picked up from their. Currently only the mandantory items
are supported.
Diffstat (limited to 'openbsc/src/gsm_04_08_utils.c')
| -rw-r--r-- | openbsc/src/gsm_04_08_utils.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/openbsc/src/gsm_04_08_utils.c b/openbsc/src/gsm_04_08_utils.c index ef9e59c77..358212f17 100644 --- a/openbsc/src/gsm_04_08_utils.c +++ b/openbsc/src/gsm_04_08_utils.c @@ -482,3 +482,35 @@ int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan, int want_imeisv) return rsl_encryption_cmd(msg); } +/* Chapter 9.1.2: Assignment Command */ +int gsm48_send_rr_ass_cmd(struct gsm_lchan *lchan, u_int8_t power_command) +{ + struct msgb *msg = gsm48_msgb_alloc(); + struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); + struct gsm48_ass_cmd *ass = + (struct gsm48_ass_cmd *) msgb_put(msg, sizeof(*ass)); + u_int16_t arfcn = lchan->ts->trx->arfcn & 0x3ff; + + DEBUGP(DRR, "-> ASSIGNMENT COMMAND tch_mode=0x%02x\n", lchan->tch_mode); + + msg->lchan = lchan; + gh->proto_discr = GSM48_PDISC_RR; + gh->msg_type = GSM48_MT_RR_ASS_CMD; + + /* + * fill the channel information element, this code + * should probably be shared with rsl_rx_chan_rqd(), + * gsm48_tx_chan_mode_modify. But beware that 10.5.2.5 + * 10.5.2.5.a have slightly different semantic for + * the chan_desc. But as long as multi-slot configurations + * are not used we seem to be fine. + */ + ass->chan_desc.chan_nr = lchan2chan_nr(lchan); + ass->chan_desc.h0.tsc = lchan->ts->trx->bts->tsc; + ass->chan_desc.h0.h = 0; + ass->chan_desc.h0.arfcn_high = arfcn >> 8; + ass->chan_desc.h0.arfcn_low = arfcn & 0xff; + ass->power_command = power_command; + + return gsm48_sendmsg(msg, NULL); +} |