diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/rfid_proto_tcl.c | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/src/rfid_proto_tcl.c b/src/rfid_proto_tcl.c index 64f28b3..4a92c62 100644 --- a/src/rfid_proto_tcl.c +++ b/src/rfid_proto_tcl.c @@ -38,6 +38,10 @@ #define RFID_MAX_FRAMELEN 256 +#define is_s_block(x) ((x & 0xc0) == 0xc0) +#define is_r_block(x) ((x & 0xc0) == 0x80) +#define is_i_block(x) ((x & 0xc0) == 0x00) + static enum rfid_frametype l2_to_frame(unsigned int layer2) { switch (layer2) { @@ -319,13 +323,15 @@ tcl_build_prologue2(struct tcl_handle *th, *prlg = pcb; - if (th->toggle) { - /* we've sent a toggle bit last time */ - th->toggle = 0; - } else { - /* we've not sent a toggle last time: send one */ - th->toggle = 1; - *prlg |= 0x01; + if (!is_s_block(pcb)) { + if (th->toggle) { + /* we've sent a toggle bit last time */ + th->toggle = 0; + } else { + /* we've not sent a toggle last time: send one */ + th->toggle = 1; + *prlg |= 0x01; + } } if (th->flags & TCL_HANDLE_F_CID_USED) { @@ -496,10 +502,6 @@ tcl_deselect(struct rfid_protocol_handle *h) return 0; } -#define is_s_block(x) ((x & 0xc0) == 0xc0) -#define is_r_block(x) ((x & 0xc0) == 0x80) -#define is_i_block(x) ((x & 0xc0) == 0x00) - struct fr_buff { unsigned int frame_len; /* length of frame */ unsigned int hdr_len; /* length of header within frame */ @@ -634,14 +636,14 @@ do_tx: if (ret < 0) goto out; - if ((xcvb.rx.data[0] & 0x01) != h->priv.tcl.toggle) { - DEBUGP("response with wrong toggle bit\n"); - goto out; - } - if (is_r_block(xcvb.rx.data[0])) { DEBUGP("R-Block\n"); + if ((xcvb.rx.data[0] & 0x01) != h->priv.tcl.toggle) { + DEBUGP("response with wrong toggle bit\n"); + goto out; + } + /* Handle ACK frame in case of chaining */ if (!check_cid(th, &xcvb)) goto out; @@ -687,6 +689,12 @@ do_tx: /* we're actually receiving payload data */ DEBUGP("I-Block: "); + + if ((xcvb.rx.data[0] & 0x01) != h->priv.tcl.toggle) { + DEBUGP("response with wrong toggle bit\n"); + goto out; + } + xcvb.rx.hdr_len = 1; if (!check_cid(th, &xcvb)) |