Re: [mISDN PATCH v2 09/19] Fix TEI and SAPI handling

From: Karsten Keil
Date: Sun May 24 2009 - 11:40:02 EST

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Hi,

new version of this patch:

Subject: [mISDN PATCH v3 09/19] Fix TEI and SAPI handling
From: Karsten Keil <keil@xxxxxxxxxxxxx>
To: linux-kernel@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx,
David Miller <davem@xxxxxxxxxxxxx>,
i4ldeveloper@xxxxxxxxxxxxxxxxxxxxxx

From: Andreas Eversberg <andreas@xxxxxxxxxxxx>

Added SAPI value to use SAPIs different than 0.

Now fixed TEIs work in NT mode. This allows PTP endpoint to be connected
to PTMP ports together with other PTMP endpoints.

New enhanced version, thanks to Sam Ravnborg <sam@xxxxxxxxxxxx> for the
hints.

David if you pull from:
"git://master.kernel.org/pub/scm/linux/kernel/git/kkeil/ISDN-2.6-net-next.git
for_david"
you get the new version.

Signed-off-by: Andreas Eversberg <andreas@xxxxxxxxxxxx>
Signed-off-by: Karsten Keil <keil@xxxxxxxxxxxxx>

diff --git a/drivers/isdn/mISDN/layer2.c b/drivers/isdn/mISDN/layer2.c
index d6e2863..2d2f581 100644
--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -2068,7 +2068,8 @@ l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
}

struct layer2 *
-create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, u_long
arg)
+create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei,
+ int sapi)
{
struct layer2 *l2;
struct channel_req rq;
@@ -2089,7 +2090,7 @@ create_l2(struct mISDNchannel *ch, u_int protocol,
u_long options, u_long arg)
test_and_set_bit(FLG_LAPD, &l2->flag);
test_and_set_bit(FLG_LAPD_NET, &l2->flag);
test_and_set_bit(FLG_MOD128, &l2->flag);
- l2->sapi = 0;
+ l2->sapi = sapi;
l2->maxlen = MAX_DFRAME_LEN;
if (test_bit(OPTION_L2_PMX, &options))
l2->window = 7;
@@ -2099,7 +2100,7 @@ create_l2(struct mISDNchannel *ch, u_int protocol,
u_long options, u_long arg)
test_and_set_bit(FLG_PTP, &l2->flag);
if (test_bit(OPTION_L2_FIXEDTEI, &options))
test_and_set_bit(FLG_FIXED_TEI, &l2->flag);
- l2->tei = (u_int)arg;
+ l2->tei = tei;
l2->T200 = 1000;
l2->N200 = 3;
l2->T203 = 10000;
@@ -2114,7 +2115,7 @@ create_l2(struct mISDNchannel *ch, u_int protocol,
u_long options, u_long arg)
test_and_set_bit(FLG_LAPD, &l2->flag);
test_and_set_bit(FLG_MOD128, &l2->flag);
test_and_set_bit(FLG_ORIG, &l2->flag);
- l2->sapi = 0;
+ l2->sapi = sapi;
l2->maxlen = MAX_DFRAME_LEN;
if (test_bit(OPTION_L2_PMX, &options))
l2->window = 7;
@@ -2124,7 +2125,7 @@ create_l2(struct mISDNchannel *ch, u_int protocol,
u_long options, u_long arg)
test_and_set_bit(FLG_PTP, &l2->flag);
if (test_bit(OPTION_L2_FIXEDTEI, &options))
test_and_set_bit(FLG_FIXED_TEI, &l2->flag);
- l2->tei = (u_int)arg;
+ l2->tei = tei;
l2->T200 = 1000;
l2->N200 = 3;
l2->T203 = 10000;
@@ -2180,7 +2181,7 @@ x75create(struct channel_req *crq)

if (crq->protocol != ISDN_P_B_X75SLP)
return -EPROTONOSUPPORT;
- l2 = create_l2(crq->ch, crq->protocol, 0, 0);
+ l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0);
if (!l2)
return -ENOMEM;
crq->ch = &l2->ch;
diff --git a/drivers/isdn/mISDN/layer2.h b/drivers/isdn/mISDN/layer2.h
index 6293f80..9547fb3 100644
--- a/drivers/isdn/mISDN/layer2.h
+++ b/drivers/isdn/mISDN/layer2.h
@@ -90,7 +90,7 @@ enum {
#define L2_STATE_COUNT (ST_L2_8+1)

extern struct layer2 *create_l2(struct mISDNchannel *, u_int,
- u_long, u_long);
+ u_long, int, int);
extern int tei_l2(struct layer2 *, u_int, u_long arg);

diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index c75af76..55a7c3d 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);
--
1.6.0.2

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Next message: Michael S. Zick: "Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic"
Previous message: RogÃrio Brito: "ioctl_internal_command messages (was: Re: [2.6.30-rc2] usb resetduring big file transfer and ext3 error)"
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