X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=src%2Frfid_layer2_iso14443a.c;h=148960dd72bda1f95e6ed1ed5aed2d89897fffb4;hb=591a1b00c180e176dd03d9d05ed8fa4964a74765;hp=66914db8c0458fa9dcc2b2080a058e161616d219;hpb=04d32adf9f8c047a5fdd150814adaa0967728937;p=librfid

diff --git a/src/rfid_layer2_iso14443a.c b/src/rfid_layer2_iso14443a.c
index 66914db..148960d 100644
--- a/src/rfid_layer2_iso14443a.c
+++ b/src/rfid_layer2_iso14443a.c
@@ -43,7 +43,7 @@ iso14443a_transceive_sf(struct rfid_layer2_handle *handle,
 			 unsigned char cmd,
 			 struct iso14443a_atqa *atqa)
 {
-	struct rfid_reader *rdr = handle->rh->reader;
+	const struct rfid_reader *rdr = handle->rh->reader;
 
 	return rdr->iso14443a.transceive_sf(handle->rh, cmd, atqa);
 }
@@ -54,7 +54,7 @@ iso14443a_transceive_acf(struct rfid_layer2_handle *handle,
 			 struct iso14443a_anticol_cmd *acf,
 			 unsigned int *bit_of_col)
 {
-	struct rfid_reader *rdr = handle->rh->reader;
+	const struct rfid_reader *rdr = handle->rh->reader;
 
 	return rdr->iso14443a.transceive_acf(handle->rh, acf, bit_of_col);
 }
@@ -85,35 +85,34 @@ iso14443a_code_nvb_bits(unsigned char *nvb, unsigned int bits)
 	return 0;
 }
 
-int random_bit(void)
+static int random_bit(void)
 {
-    unsigned long e;
+	unsigned long e;
 
-    e = randctx[0];    
-    randctx[0]=randctx[1];
-    randctx[1]=(randctx[2]<<19) + (randctx[2]>>13) + randctx[3];
-    randctx[2]=randctx[3] ^ randctx[0];
-    randctx[3]=e+randctx[1];
+	e = randctx[0];    
+	randctx[0] = randctx[1];
+	randctx[1] = (randctx[2]<<19) + (randctx[2]>>13) + randctx[3];
+	randctx[2] = randctx[3] ^ randctx[0];
+	randctx[3] = e+randctx[1];
     
-    return randctx[1]&1;
+	return randctx[1]&1;
 }
 
 /* first bit is '1', second bit '2' */
 static void
 rnd_toggle_bit_in_field(unsigned char *bitfield, unsigned int size, unsigned int bit)
 {
-    unsigned int byte,rnd;
+	unsigned int byte,rnd;
 
-    if(bit && (bit <= (size*8)) )
-    {
-	rnd=random_bit();
+	if (bit && (bit <= (size*8))) {
+		rnd = random_bit();
 	
-        DEBUGP("xor'ing bit %u with %u\n",bit,rnd);
-        bit--;
-        byte=bit/8;
-        bit=rnd<<(bit%8);
-        bitfield[byte] ^= bit;
-    }
+		DEBUGP("xor'ing bit %u with %u\n",bit,rnd);
+		bit--;
+		byte = bit/8;
+		bit = rnd << (bit % 8);
+		bitfield[byte] ^= bit;
+	}
 }
 
 
@@ -238,13 +237,10 @@ cascade:
 		}
 	}
 
-	h->level = ISO14443A_LEVEL_NONE;
-	h->state = ISO14443A_STATE_SELECTED;
-
 	{
-		if (uid_size == 1)
+		if (h->level == ISO14443A_LEVEL_CL1)
 			handle->uid_len = 4;
-		else if (uid_size == 2)
+		else if (h->level == ISO14443A_LEVEL_CL2)
 			handle->uid_len = 7;
 		else 
 			handle->uid_len = 10;
@@ -252,6 +248,9 @@ cascade:
 		DEBUGP("UID %s\n", rfid_hexdump(handle->uid, handle->uid_len));
 	}
 
+	h->level = ISO14443A_LEVEL_NONE;
+	h->state = ISO14443A_STATE_SELECTED;
+
 	if (sak[0] & 0x20) {
 		DEBUGP("we have a T=CL compliant PICC\n");
 		handle->proto_supported = 1 << RFID_PROTOCOL_TCL;
@@ -289,7 +288,7 @@ iso14443a_setopt(struct rfid_layer2_handle *handle, int optname,
 		 const void *optval, unsigned int optlen)
 {
 	int ret = -EINVAL;
-	struct rfid_reader *rdr = handle->rh->reader;
+	const struct rfid_reader *rdr = handle->rh->reader;
 	unsigned int speed;
 
 	switch (optname) {