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Bluetooth: Read RFC conf option on a successful Conf RSP 

On Enhanced Retransmission Mode and Streaming Mode a entity can send, on
a successful Conf RSP, new values for the RFC fields. For example, the
entity can send txWindow and MPS values less than the value received on
a Conf REQ.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Gustavo F. Padovan 2010-05-01 16:15:39 -03:00 committed by Marcel Holtmann
parent 2fb862e215
commit 7b1c0049be
1 changed files with 38 additions and 1 deletions
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39
net/bluetooth/l2cap.c
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@ -2602,6 +2602,42 @@ static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 fla
return ptr - data;
}
static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len)
{
struct l2cap_pinfo *pi = l2cap_pi(sk);
int type, olen;
unsigned long val;
struct l2cap_conf_rfc rfc;
BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len);
if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING))
return;
while (len >= L2CAP_CONF_OPT_SIZE) {
len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
switch (type) {
case L2CAP_CONF_RFC:
if (olen == sizeof(rfc))
memcpy(&rfc, (void *)val, olen);
goto done;
}
}
done:
switch (rfc.mode) {
case L2CAP_MODE_ERTM:
pi->remote_tx_win = rfc.txwin_size;
pi->retrans_timeout = rfc.retrans_timeout;
pi->monitor_timeout = rfc.monitor_timeout;
pi->mps = le16_to_cpu(rfc.max_pdu_size);
break;
case L2CAP_MODE_STREAMING:
pi->mps = le16_to_cpu(rfc.max_pdu_size);
}
}
static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
{
struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data;
@ -2881,6 +2917,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data;
u16 scid, flags, result;
struct sock *sk;
int len = cmd->len - sizeof(*rsp);
scid = __le16_to_cpu(rsp->scid);
flags = __le16_to_cpu(rsp->flags);
@ -2895,11 +2932,11 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
switch (result) {
case L2CAP_CONF_SUCCESS:
l2cap_conf_rfc_get(sk, rsp->data, len);
break;
case L2CAP_CONF_UNACCEPT:
if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
int len = cmd->len - sizeof(*rsp);
char req[64];
if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) {