DNSServiceErrorType DNSSD_API TXTRecordSetValue
(
TXTRecordRef *txtRecord,
const char *key,
uint8_t valueSize,
const void *value
)
{
uint8_t *start, *p;
const char *k;
unsigned long keysize, keyvalsize;
for (k = key; *k; k++) if (*k < 0x20 || *k > 0x7E || *k == '=') return(kDNSServiceErr_Invalid);
keysize = (unsigned long)(k - key);
keyvalsize = 1 + keysize + (value ? (1 + valueSize) : 0);
if (keysize < 1 || keyvalsize > 255) return(kDNSServiceErr_Invalid);
(void)TXTRecordRemoveValue(txtRecord, key);
if (txtRec->datalen + keyvalsize > txtRec->buflen)
{
unsigned char *newbuf;
unsigned long newlen = txtRec->datalen + keyvalsize;
if (newlen > 0xFFFF) return(kDNSServiceErr_Invalid);
newbuf = malloc((size_t)newlen);
if (!newbuf) return(kDNSServiceErr_NoMemory);
memcpy(newbuf, txtRec->buffer, txtRec->datalen);
if (txtRec->malloced) free(txtRec->buffer);
txtRec->buffer = newbuf;
txtRec->buflen = (uint16_t)(newlen);
txtRec->malloced = 1;
}
start = txtRec->buffer + txtRec->datalen;
p = start + 1;
memcpy(p, key, keysize);
p += keysize;
if (value)
{
*p++ = '=';
memcpy(p, value, valueSize);
p += valueSize;
}
*start = (uint8_t)(p - start - 1);
txtRec->datalen += p - start;
return(kDNSServiceErr_NoError);
}
STDMETHODIMP CTXTRecord::RemoveValue(BSTR key)
{
HRESULT hr = S_OK;
if ( m_allocated )
{
std::string keyUTF8;
BOOL ok;
DNSServiceErrorType err;
ok = BSTRToUTF8( key, keyUTF8 );
require_action( ok, exit, hr = S_FALSE );
err = TXTRecordRemoveValue( &m_tref, keyUTF8.c_str() );
require_action( !err, exit, hr = S_FALSE );
}
exit:
return hr;
}
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char *argv[]) {
const char *r;
TXTRecordRef ref;
uint8_t l;
const void *p;
char k[256];
TXTRecordCreate(&ref, 0, NULL);
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "foo", 7, "lennart");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "waldo", 5, "rocks");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "quux", 9, "the_house");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "yeah", 0, NULL);
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "waldo", 6, "rocked");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordRemoveValue(&ref, "foo");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordRemoveValue(&ref, "waldo");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "kawumm", 6, "bloerb");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "one", 1, "1");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "two", 1, "2");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
TXTRecordSetValue(&ref, "three", 1, "3");
hexdump(TXTRecordGetBytesPtr(&ref), TXTRecordGetLength(&ref));
assert(TXTRecordContainsKey(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref), "two"));
assert(!TXTRecordContainsKey(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref), "four"));
r = TXTRecordGetValuePtr(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref), "kawumm", &l);
hexdump(r, l);
assert(TXTRecordGetCount(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref)) == 6);
TXTRecordGetItemAtIndex(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref), 2, sizeof(k), k, &l, &p);
fprintf(stderr, "key=<%s>\n", k);
hexdump(p, l);
assert(TXTRecordGetItemAtIndex(TXTRecordGetLength(&ref), TXTRecordGetBytesPtr(&ref), 20, sizeof(k), k, &l, &p) == kDNSServiceErr_Invalid);
TXTRecordDeallocate(&ref);
}
