From bf9f1fd058c5ca324b2df5223c582ef1ece7a698 Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Sat, 24 Jun 2023 21:52:34 +0200
Subject: Tag data management skeleton

---
 reader.c | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

(limited to 'reader.c')

diff --git a/reader.c b/reader.c
index 0ca56cf..5f1316b 100644
--- a/reader.c
+++ b/reader.c
@@ -13,8 +13,8 @@
 #define DEFAULT_POLL_TIMEOUT 1000
 #define MAX_TAGS 5
 
-#define FLAG_PRESENT 8
-#define FLAG_ACTIVE 16
+#define FLAG_PRESENT 16
+#define FLAG_ACTIVE 32
 
 static void* reader_module = NULL;
 static reader_plugin_handle reader_backend_handle = NULL;
@@ -92,12 +92,12 @@ static void reader_print_tag(nfc_tag_info_t tag){
 	switch(tag.type){
 		case tag_unset: type = "UNST"; break;
 		case tag_unknown: type = "UNKN"; break;
-		case tag_mifare1: type = "MFR1"; break;
+		case tag_mifare1: type = "MIFR"; break;
 		case tag_ntag: type = "NTAG"; break;
 		case tag_desfire: type = "DESF"; break;
 	}
 
-	printf("[%s", type);
+	printf("[%s:%lu", type, tag.bytes_available);
 	for(n = 0; n < tag.uid_length; n++){
 		printf(" %02X", tag.uid[n]);
 	}
@@ -111,6 +111,16 @@ static void reader_expire(){
 	}
 }
 
+static void tag_info_free(nfc_tag_info_t* tag){
+	free(tag->static_data);
+	tag->static_data = NULL;
+	tag->static_length = 0;
+
+	free(tag->dynamic_data);
+	tag->dynamic_data = NULL;
+	tag->dynamic_length = 0;
+}
+
 static int reader_process(){
 	size_t n = 0;
 	for(n = 0; n < MAX_TAGS; n++){
@@ -144,8 +154,8 @@ static int reader_process(){
 		}
 		else{
 			if(tags[n].flags & FLAG_ACTIVE){
-				//tag was removed
-				//TODO
+				//tag was removed - free any allocated members
+				tag_info_free(&(tags[n].info));
 				printf("Tag in slot %lu removed\n", n);
 			}
 
@@ -156,7 +166,7 @@ static int reader_process(){
 	return 0;
 }
 
-int reader_tag_present(uint8_t flags, nfc_tag_info_t tag){
+int reader_tag_present(uint8_t flags, nfc_tag_info_t* tag){
 	size_t n = 0;
 
 	//sanitize input flags
@@ -165,15 +175,15 @@ int reader_tag_present(uint8_t flags, nfc_tag_info_t tag){
 	//check if tag already known
 	for(n = 0; n < MAX_TAGS; n++){
 		if((tags[n].flags & (FLAG_PRESENT | FLAG_ACTIVE))
-				&& tags[n].info.uid_length == tag.uid_length
-				&& !memcmp(tags[n].info.uid, tag.uid, tag.uid_length)){
+				&& tags[n].info.uid_length == tag->uid_length
+				&& !memcmp(tags[n].info.uid, tag->uid, tag->uid_length)){
 			//mark still present
 			tags[n].flags |= FLAG_PRESENT;
 
 			//if full data submitted, copy in and set flags
 			if(!(tags[n].flags & TAG_STATUS_FLAGS)){
 				if(flags & TAG_STATUS_FLAGS){
-					memcpy(&(tags[n].info), &tag, sizeof(tag));
+					memcpy(&(tags[n].info), tag, sizeof(nfc_tag_info_t));
 					tags[n].flags |= flags;
 					return 0;
 				}
@@ -188,7 +198,7 @@ int reader_tag_present(uint8_t flags, nfc_tag_info_t tag){
 	for(n = 0; n < MAX_TAGS; n++){
 		if(!tags[n].flags){
 			tags[n].flags |= FLAG_PRESENT | flags;
-			memcpy(&(tags[n].info), &tag, sizeof(tag));
+			memcpy(&(tags[n].info), tag, sizeof(nfc_tag_info_t));
 			return (tags[n].flags & TAG_STATUS_FLAGS) ? 0 : TAG_READ_REQUESTED;
 		}
 	}
-- 
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