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| author |   Karsten Keil <keil@b1-systems.de> | 2009-07-08 20:58:33 +0200 |
|---|---|---|
| committer | Karsten Keil <keil@b1-systems.de> | 2009-07-25 20:16:17 +0200 |
| commit | f3fad223ed69f406f33c9619c256858d5a5fc5c7 (patch) | |
| tree | 47987e6358d83c3f01ae500abffd1e869a577a2c /drivers/isdn | |
| parent | ISDN: Add support for none reverse bitstreams to isdnhdc (diff) | |
| download | linux-dev-f3fad223ed69f406f33c9619c256858d5a5fc5c7.tar.xz linux-dev-f3fad223ed69f406f33c9619c256858d5a5fc5c7.zip | |
ISDN: Fix isdnhdlc for one byte hdlc packets
Normally HDLC packets contain more as one byte (e.g a X25/X75 header).
But if you use plain HDLC framing, the current code do not encode
1 byte payloads, this patch fix that.
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Diffstat (limited to 'drivers/isdn')
| -rw-r--r-- | drivers/isdn/i4l/isdnhdlc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/isdn/i4l/isdnhdlc.c b/drivers/isdn/i4l/isdnhdlc.c index df345ce73f48..c989aa35dc2f 100644 --- a/drivers/isdn/i4l/isdnhdlc.c +++ b/drivers/isdn/i4l/isdnhdlc.c @@ -47,7 +47,7 @@ enum { HDLC_SEND_DATA, HDLC_SEND_CRC1, HDLC_SEND_FAST_FLAG, HDLC_SEND_FIRST_FLAG, HDLC_SEND_CRC2, HDLC_SEND_CLOSING_FLAG, HDLC_SEND_IDLE1, HDLC_SEND_FAST_IDLE, HDLC_SENDFLAG_B0, - HDLC_SENDFLAG_B1A6, HDLC_SENDFLAG_B7, STOPPED + HDLC_SENDFLAG_B1A6, HDLC_SENDFLAG_B7, STOPPED, HDLC_SENDFLAG_ONE }; void isdnhdlc_rcv_init(struct isdnhdlc_vars *hdlc, u32 features) @@ -362,6 +362,9 @@ int isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src, u16 slen, *count = slen; + /* special handling for one byte frames */ + if ((slen == 1) && (hdlc->state == HDLC_SEND_FAST_FLAG)) + hdlc->state = HDLC_SENDFLAG_ONE; while (dsize > 0) { if (hdlc->bit_shift == 0) { if (slen && !hdlc->do_closing) { @@ -407,6 +410,8 @@ int isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src, u16 slen, dsize--; break; } + /* fall through */ + case HDLC_SENDFLAG_ONE: if (hdlc->bit_shift == 8) { hdlc->cbin = hdlc->ffvalue >> (8 - hdlc->data_bits); |