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LC15: remove bogus check_for_ciph_cmd() copy

This commit is contained in:
Harald Welte 2016-01-25 15:44:05 +01:00
parent e634fd256b
commit 81cc8cdba5
1 changed files with 0 additions and 45 deletions
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45
src/osmo-bts-litecell15/l1_if.c
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@ -231,51 +231,6 @@ empty_req_from_rts_ind(GsmL1_Prim_t *l1p,
return empty_req;
}
/* check if the message is a GSM48_MT_RR_CIPH_M_CMD, and if yes, enable
* uni-directional de-cryption on the uplink. We need this ugly layering
* violation as we have no way of passing down L3 metadata (RSL CIPHERING CMD)
* to this point in L1 */
static int check_for_ciph_cmd(struct lc15l1_hdl *fl1h,
struct msgb *msg, struct gsm_lchan *lchan)
{
uint8_t n_s;
/* only do this if we are in the right state */
switch (lchan->ciph_state) {
case LCHAN_CIPH_NONE:
case LCHAN_CIPH_RX_REQ:
break;
default:
return 0;
}
/* First byte (Address Field) of LAPDm header) */
if (msg->data[0] != 0x03)
return 0;
/* First byte (protocol discriminator) of RR */
if ((msg->data[3] & 0xF) != GSM48_PDISC_RR)
return 0;
/* 2nd byte (msg type) of RR */
if ((msg->data[4] & 0x3F) != GSM48_MT_RR_CIPH_M_CMD)
return 0;
/* Remember N(S) + 1 to find the first ciphered frame */
n_s = (msg->data[1] >> 1) & 0x7;
lchan->ciph_ns = (n_s + 1) % 8;
lchan->ciph_state = LCHAN_CIPH_RX_REQ;
l1if_set_ciphering(fl1h, lchan, 0);
return 1;
}
/* public helpers for the test */
int bts_check_for_ciph_cmd(struct lc15l1_hdl *fl1h,
struct msgb *msg, struct gsm_lchan *lchan)
{
return check_for_ciph_cmd(fl1h, msg, lchan);
}
static const uint8_t fill_frame[GSM_MACBLOCK_LEN] = {
0x03, 0x03, 0x01, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B,
0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B,