From 7a398f0b121d787ffc45d1371aa5f6e438576e9b Mon Sep 17 00:00:00 2001
From: laforge <laforge@e0336214-984f-0b4b-a45f-81c69e1f0ede>
Date: Fri, 23 Jun 2006 20:26:40 +0000
Subject: fix TX chaining: Don't use/respect toggle bit (block nr) for
 S-blocks.

git-svn-id: https://svn.gnumonks.org/trunk/librfid@1831 e0336214-984f-0b4b-a45f-81c69e1f0ede
---
 include/librfid/rfid.h |  2 +-
 pegoda/pegoda.c        | 14 ++++++++++----
 src/rfid_proto_tcl.c   | 40 ++++++++++++++++++++++++----------------
 3 files changed, 35 insertions(+), 21 deletions(-)

diff --git a/include/librfid/rfid.h b/include/librfid/rfid.h
index 76e86e3..b1943d7 100644
--- a/include/librfid/rfid.h
+++ b/include/librfid/rfid.h
@@ -11,7 +11,7 @@ enum rfid_frametype {
 	RFID_MIFARE_FRAME,
 };
 
-#if 0
+#if 1
 #define DEBUGP(x, args ...) fprintf(stderr, "%s(%d):%s: " x, __FILE__, __LINE__, __FUNCTION__, ## args)
 #define DEBUGPC(x, args ...) fprintf(stderr, x, ## args)
 #else
diff --git a/pegoda/pegoda.c b/pegoda/pegoda.c
index f391d62..8b73755 100644
--- a/pegoda/pegoda.c
+++ b/pegoda/pegoda.c
@@ -118,7 +118,7 @@ int pegoda_transceive(struct pegoda_handle *ph,
 
 	memcpy(rx, rxbuf+sizeof(*rxhdr), rc-sizeof(*rxhdr));
 
-	return 0;
+	return rxhdr->cmd;
 }
 
 struct pegoda_handle *pegoda_open(void)
@@ -253,6 +253,7 @@ int main(int argc, char **argv)
 	unsigned char rbuf[256];
 	unsigned int rlen = sizeof(rbuf);
 	struct pegoda_handle *ph;
+	int i;
 
 	ph = pegoda_open();
 	if (!ph)
@@ -284,9 +285,14 @@ int main(int argc, char **argv)
 	pegoda_transceive(ph, PEGODA_CMD_PICC_CASC_SELECT, 
 			  buf, 5, rbuf, &rlen);
 
-	pegoda_auth_key(ph, 0, "\xff\xff\xff\xff\xff\xff");
-	pegoda_read16(ph, 0, rbuf);
-	printf("read16 = %s\n", hexdump(rbuf, 16));
+	for (i = 0; i < 16; i++) {
+		int j;
+		pegoda_auth_key(ph, i, "\xff\xff\xff\xff\xff\xff");
+		for (j = 0; j < 4; j++) {
+			pegoda_read16(ph, (i*4)+j, rbuf);
+			printf("read16[%u:%u] = %s\n", i,j,hexdump(rbuf, 16));
+		}
+	}
 	
 	exit(0);
 }
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))
-- 
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