void MDNS::writeResponses(uint16_t responses) {
// Reset output offsets for name compression
for (uint8_t i = 0; i < NAME_COUNT; i++) {
labels[i]->reset();
}
// Don't send additional responses where we are already sending answers
responses &= ~(responses << FLAG_COUNT);
uint8_t answerCount = count(responses);
uint8_t additionalCount = count(responses >> FLAG_COUNT);
buffer->writeUInt16(0x0);
buffer->writeUInt16(0x8400);
buffer->writeUInt16(0x0);
buffer->writeUInt16(answerCount);
buffer->writeUInt16(0x0);
buffer->writeUInt16(additionalCount);
while (responses > 0) {
if ((responses & A_FLAG) != 0) {
writeARecord();
}
if ((responses & PTR_FLAG) != 0) {
writePTRRecord();
}
if ((responses & SRV_FLAG) != 0) {
writeSRVRecord();
}
if ((responses & TXT_FLAG) != 0) {
writeTXTRecord();
}
if ((responses & NSEC_HOST_FLAG) != 0) {
writeNSECHostRecord();
}
if ((responses & NSEC_INSTANCE_FLAG) != 0) {
writeNSECInstanceRecord();
}
responses >>= FLAG_COUNT;
}
}
static void sendReply2(NyLPC_TcMDnsServer_t* i_inst, const struct NyLPC_TDnsHeader* i_dns_header, const struct NyLPC_TDnsQuestion* q)
{
NyLPC_TInt16 ptr_recode;
NyLPC_TInt16 i2;
char* obuf;
NyLPC_TUInt16 obuflen;
NyLPC_TUInt16 l;
//パケットヘッダの生成
switch (q->qtype){
case NyLPC_TDnsQuestion_QTYPR_SRV:
//
ptr_recode = NyLPC_TDnsRecord_getMatchSrvIdx(i_inst->_ref_record, q);
if (ptr_recode<0){
goto DROP;
}
//Bufferの取得
obuf = NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket, 512, &obuflen, 0);
if (obuf == NULL){
goto DROP;
}
//SRV,(TXT,A,AAAA,NSEC)
l = setResponseHeader(obuf, i_dns_header, 1, 0, 3);
l = writeSRVRecord(i_inst, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
l = writeTXTRecord(i_inst, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//Aレコード
l = writeARecord(obuf, l, obuflen, i_inst->_ref_record->a, NyLPC_iUdpSocket_getSockIP(i_inst->_socket));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
// //AAAAレコード
// l = writeAAAARecord(obuf, l, obuflen, i_inst->_ref_record->a, &(i_inst->_super.uip_udp_conn.lipaddr));
// if (l <= 0){
// NyLPC_OnErrorGoto(ERROR);
// }
//NSEC
l = writeNSECRecord(obuf, l, obuflen, i_inst->_ref_record->a);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
break;
/* case NyLPC_TDnsQuestion_QTYPR_AAAA:
//自分宛？(name.local)
if (!NyLPC_TDnsQuestion_isEqualName(q, i_inst->_ref_record->a, "")){
goto DROP;
}
//Bufferの取得
obuf = NyLPC_cUdpSocket_allocSendBuf(&(i_inst->_super), 512, &obuflen, 0);
if (obuf == NULL){
goto DROP;
}
//Headerのコピー
//AAAA,(A,NSEC)
l = setResponseHeader(obuf, i_dns_header, 1, 0, 2);
//AAAAレコード
l = writeAAAARecordByQuery(obuf, l, obuflen, q, &(i_inst->_super.uip_udp_conn.lipaddr));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//Aレコードのみ
l = writeARecordByQuery(obuf, l, obuflen, q, &(i_inst->_super.uip_udp_conn.lipaddr));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//NSEC
l = writeNSECRecordByQuery(obuf, l, obuflen, q);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
break;*/
case NyLPC_TDnsQuestion_QTYPR_A:
//自分宛？(name.local)
if (!NyLPC_TDnsQuestion_isEqualName(q, i_inst->_ref_record->a, "")){
goto DROP;
}
//Bufferの取得
obuf = NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket, 512, &obuflen, 0);
if (obuf == NULL){
goto DROP;
}
//Headerのコピー
l = setResponseHeader(obuf, i_dns_header, 1, 0, 1);
//A、(NSEC
l = writeARecordByQuery(obuf, l, obuflen, q, NyLPC_iUdpSocket_getSockIP(i_inst->_socket));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
l = writeNSECRecordByQuery(obuf, l, obuflen, q);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
break;
case NyLPC_TDnsQuestion_QTYPR_PTR:
//_service._dns-sd._udpかどうか
if (NyLPC_TDnsQuestion_isEqualName(q, NULL, "_services._dns-sd._udp")){
//Bufferの取得
obuf = NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket, 512, &obuflen, 0);
if (obuf == NULL){
goto DROP;
}
l = setResponseHeader(obuf, i_dns_header, i_inst->_ref_record->num_of_srv, 0, 0);
for (i2 = 0; i2<i_inst->_ref_record->num_of_srv; i2++){
l = writeSdPtrRecord(&(i_inst->_ref_record->srv[i2]), obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
}
}
else{
//自分宛？(proto.local)
ptr_recode = NyLPC_TDnsRecord_getMatchPtrIdx(i_inst->_ref_record, q);
if (ptr_recode<0){
goto DROP;
}
//Bufferの取得
obuf = NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket, 512, &obuflen, 0);
if (obuf == NULL){
goto DROP;
}
l = setResponseHeader(obuf, i_dns_header, 1, 0, 4);
l = writePtrRecord(i_inst->_ref_record, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//SRV
l = writeSRVRecord(i_inst, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//TXT
l = writeTXTRecord(i_inst, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//Aレコード
l = writeARecord(obuf, l, obuflen, i_inst->_ref_record->a,NyLPC_iUdpSocket_getSockIP(i_inst->_socket));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
// //AAAAレコード
// l = writeAAAARecord(obuf, l, obuflen, i_inst->_ref_record->a, &(i_inst->_super.uip_udp_conn.lipaddr));
// if (l <= 0){
// NyLPC_OnErrorGoto(ERROR);
// }
//NSEC
l = writeNSECRecord(obuf, l, obuflen, i_inst->_ref_record->a);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
}
break;
case NyLPC_TDnsQuestion_QTYPR_TXT:
//自分宛？(proto.local)
ptr_recode = NyLPC_TDnsRecord_getMatchSrvIdx(i_inst->_ref_record, q);
if (ptr_recode<0){
goto DROP;
}
//Bufferの取得
obuf = NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket, 512, &obuflen, 0);
l = setResponseHeader(obuf, i_dns_header, 1, 0, 2);
l = writeTXTRecord(i_inst, ptr_recode, obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
//A recoad
l = writeARecord(obuf, l, obuflen, i_inst->_ref_record->a,NyLPC_iUdpSocket_getSockIP(i_inst->_socket));
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
// //AAAAレコード
// l = writeAAAARecord(obuf, l, obuflen, i_inst->_ref_record->a, &(i_inst->_super.uip_udp_conn.lipaddr));
// if (l <= 0){
// NyLPC_OnErrorGoto(ERROR);
// }
//NSEC
l = writeNSECRecord(obuf, l, obuflen, i_inst->_ref_record->a);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
break;
default:
goto DROP;
}
if (!NyLPC_iUdpSocket_psend(i_inst->_socket, &MDNS_MCAST_IPADDR, MDNS_MCAST_PORT, obuf, l)){
NyLPC_OnErrorGoto(ERROR);
}
return;
ERROR:
NyLPC_iUdpSocket_releaseSendBuf(i_inst->_socket, obuf);
DROP:
return;
}
static void sendAnnounse(NyLPC_TcMDnsServer_t* i_inst)
{
char* obuf;
NyLPC_TUInt16 obuflen;
NyLPC_TUInt16 l;
int i,i2;
for(i2=0;i2<i_inst->_ref_record->num_of_srv;i2++){
//Bufferの取得
obuf=NyLPC_iUdpSocket_allocSendBuf(i_inst->_socket,512,&obuflen,TIMEOUT_IN_MS);
if(obuf==NULL){
return;
}
l=setAnnounceHeader(obuf,1+i_inst->_ref_record->num_of_srv+4,0,0);
//<Answer />
//PTR
l=writePtrRecord(i_inst->_ref_record,i2,obuf,l,obuflen);
//SD-PTR
if(l<=0){
NyLPC_OnErrorGoto(ERROR);
}
for (i = 0; i<i_inst->_ref_record->num_of_srv; i++){
l = writeSdPtrRecord(&(i_inst->_ref_record->srv[i]), obuf, l, obuflen);
if (l <= 0){
NyLPC_OnErrorGoto(ERROR);
}
}
//<Additional/>
//SRV
l=writeSRVRecord(i_inst,i2,obuf,l,obuflen);
if(l<=0){
NyLPC_OnErrorGoto(ERROR);
}
//TXT
l=writeTXTRecord(i_inst,i2,obuf,l,obuflen);
if(l<=0){
NyLPC_OnErrorGoto(ERROR);
}
//Aレコード
l=writeARecord(obuf,l,obuflen,i_inst->_ref_record->a,NyLPC_iUdpSocket_getSockIP(i_inst->_socket));
if(l<=0){
NyLPC_OnErrorGoto(ERROR);
}
// //AAAAレコード
// l=writeAAAARecord(obuf,l,obuflen,i_inst->_ref_record->a,&(i_inst->_super.uip_udp_conn.lipaddr));
// if(l<=0){
// NyLPC_OnErrorGoto(ERROR);
// }
//NSEC
l=writeNSECRecord(obuf,l,obuflen,i_inst->_ref_record->a);
if(l<=0){
NyLPC_OnErrorGoto(ERROR);
}
if(!NyLPC_iUdpSocket_psend(i_inst->_socket,&MDNS_MCAST_IPADDR,MDNS_MCAST_PORT,obuf,l)){
NyLPC_OnErrorGoto(ERROR);
}
}
return;
ERROR:
NyLPC_iUdpSocket_releaseSendBuf(i_inst->_socket,obuf);
return;
}