function for constructing ndef struct from uri

diff --git a/ykpers.c b/ykpers.c
index 59b345448a98813b4d6d2abbdf5adca8fc556a3e..802aa7153429faac9bdcd3d4dffe4b22d7a09daa 100644 (file)
--- a/ykpers.c
+++ b/ykpers.c
@@ -78,6 +78,45 @@ static const YK_CONFIG default_config2 = {
        0                       /* crc */
 };
 
+/* From nfcforum-ts-rtd-uri-1.0.pdf */
+static char *ndef_identifiers[] = {
+       "http://www.",
+       "https://www.",
+       "http://",
+       "https://",
+       "tel:",
+       "mailto:",
+       "ftp://anonymous:anonymous@",
+       "ftp://ftp.",
+       "ftps://",
+       "sftp://",
+       "smb://",
+       "nfs://",
+       "ftp://",
+       "dav://",
+       "news:",
+       "telnet://",
+       "imap:",
+       "rtsp://",
+       "urn:",
+       "pop:",
+       "sip:",
+       "sips:",
+       "tftp:",
+       "btspp://",
+       "btl2cap://",
+       "btgoep://",
+       "tcpobex://",
+       "irdaobex://",
+       "file://",
+       "urn:epc:id:",
+       "urn:epc:tag:",
+       "urn:epc:pat:",
+       "urn:epc:raw:",
+       "urn:epc:",
+       "urn:nfc:"
+};
+
 YKP_CONFIG *ykp_create_config(void)
 {
        YKP_CONFIG *cfg = malloc(sizeof(YKP_CONFIG));
@@ -332,6 +371,33 @@ int ykp_AES_key_from_passphrase(YKP_CONFIG *cfg, const char *passphrase,
        return 0;
 }
 
+/* Fill in the data and len parts of the YKNDEF struct based on supplied uri. */
+int ykp_construct_ndef(YKNDEF *ndef, const char *uri)
+{
+       int num_identifiers = sizeof(ndef_identifiers) / sizeof(char*);
+       int index = 0;
+       for(; index < num_identifiers; index++) {
+               size_t len = strlen(ndef_identifiers[index]);
+               if(strncmp(uri, ndef_identifiers[index], len) == 0) {
+                       uri += len;
+                       break;
+               }
+       }
+       if(index > num_identifiers) {
+               ndef->data[0] = 0;
+       } else {
+               ndef->data[0] = index + 1;
+       }
+       size_t data_length = strlen(uri);
+       if(data_length + 1 > NDEF_DATA_SIZE) {
+               ykp_errno = YKP_EINVAL;
+               return 1;
+       }
+       memcpy(ndef->data + 1, uri, data_length);
+       ndef->len = data_length + 1;
+       return 0;
+}
+
 static bool vcheck_all(const YKP_CONFIG *cfg)
 {
        return true;