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path: root/drivers/isdn/mISDN/tei.c
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Diffstat (limited to 'drivers/isdn/mISDN/tei.c')
-rw-r--r--drivers/isdn/mISDN/tei.c40
1 files changed, 21 insertions, 19 deletions
diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index c75af762a06..55a7c3dac3c 100644
--- a/drivers/isdn/mISDN/tei.c
+++ b/drivers/isdn/mISDN/tei.c
@@ -426,7 +426,7 @@ done:
}
static void
-put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, u_char tei)
+put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei)
{
struct sk_buff *skb;
u_char bp[8];
@@ -440,9 +440,8 @@ put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, u_char tei)
bp[4] = ri >> 8;
bp[5] = ri & 0xff;
bp[6] = m_id;
- bp[7] = (tei << 1) | 1;
- skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr),
- 8, bp, GFP_ATOMIC);
+ bp[7] = ((tei << 1) & 0xff) | 1;
+ skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC);
if (!skb) {
printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
return;
@@ -777,7 +776,7 @@ tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
}
static struct layer2 *
-create_new_tei(struct manager *mgr, int tei)
+create_new_tei(struct manager *mgr, int tei, int sapi)
{
u_long opt = 0;
u_long flags;
@@ -786,12 +785,12 @@ create_new_tei(struct manager *mgr, int tei)
if (!mgr->up)
return NULL;
- if (tei < 64)
+ if ((tei >= 0) && (tei < 64))
test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
if (mgr->ch.st->dev->Dprotocols
& ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
test_and_set_bit(OPTION_L2_PMX, &opt);
- l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, (u_int)opt, (u_long)tei);
+ l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi);
if (!l2) {
printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
return NULL;
@@ -839,12 +838,17 @@ new_tei_req(struct manager *mgr, u_char *dp)
ri += dp[1];
if (!mgr->up)
goto denied;
- tei = get_free_tei(mgr);
+ if (!(dp[3] & 1)) /* Extension bit != 1 */
+ goto denied;
+ if (dp[3] != 0xff)
+ tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */
+ else
+ tei = get_free_tei(mgr);
if (tei < 0) {
printk(KERN_WARNING "%s:No free tei\n", __func__);
goto denied;
}
- l2 = create_new_tei(mgr, tei);
+ l2 = create_new_tei(mgr, tei, CTRL_SAPI);
if (!l2)
goto denied;
else
@@ -976,8 +980,6 @@ create_teimgr(struct manager *mgr, struct channel_req *crq)
__func__, dev_name(&mgr->ch.st->dev->dev),
crq->protocol, crq->adr.dev, crq->adr.channel,
crq->adr.sapi, crq->adr.tei);
- if (crq->adr.sapi != 0) /* not supported yet */
- return -EINVAL;
if (crq->adr.tei > GROUP_TEI)
return -EINVAL;
if (crq->adr.tei < 64)
@@ -1024,8 +1026,8 @@ create_teimgr(struct manager *mgr, struct channel_req *crq)
}
return 0;
}
- l2 = create_l2(crq->ch, crq->protocol, (u_int)opt,
- (u_long)crq->adr.tei);
+ l2 = create_l2(crq->ch, crq->protocol, opt,
+ crq->adr.tei, crq->adr.sapi);
if (!l2)
return -ENOMEM;
l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
@@ -1166,7 +1168,7 @@ static int
check_data(struct manager *mgr, struct sk_buff *skb)
{
struct mISDNhead *hh = mISDN_HEAD_P(skb);
- int ret, tei;
+ int ret, tei, sapi;
struct layer2 *l2;
if (*debug & DEBUG_L2_CTRL)
@@ -1178,18 +1180,18 @@ check_data(struct manager *mgr, struct sk_buff *skb)
return -ENOTCONN;
if (skb->len != 3)
return -ENOTCONN;
- if (skb->data[0] != 0)
- /* only SAPI 0 command */
- return -ENOTCONN;
+ if (skb->data[0] & 3) /* EA0 and CR must be 0 */
+ return -EINVAL;
+ sapi = skb->data[0] >> 2;
if (!(skb->data[1] & 1)) /* invalid EA1 */
return -EINVAL;
- tei = skb->data[1] >> 0;
+ tei = skb->data[1] >> 1;
if (tei > 63) /* not a fixed tei */
return -ENOTCONN;
if ((skb->data[2] & ~0x10) != SABME)
return -ENOTCONN;
/* We got a SABME for a fixed TEI */
- l2 = create_new_tei(mgr, tei);
+ l2 = create_new_tei(mgr, tei, sapi);
if (!l2)
return -ENOMEM;
ret = l2->ch.send(&l2->ch, skb);