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cwMdns.cpp : Almost working version.

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This commit is contained in:
kpl 2020-01-31 16:40:33 -05:00
parent fafc6643de
commit 7d2fb0d234
1 changed files with 136 additions and 35 deletions
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163
cwMdns.cpp
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@ -8,6 +8,7 @@
#include "cwTcpSocket.h"
#include "cwTcpSocketSrv.h"
#include "cwMdns.h"
#include "cwTime.h"
namespace cw
{
@ -71,6 +72,9 @@ namespace cw
unsigned recvBufByteN;
unsigned cbN;
mdns_t mdns;
unsigned protocolState;
time::spec_t t0;
unsigned txtXmtN;
} mdns_app_t;
@ -481,7 +485,12 @@ namespace cw
// Note that the buffer should be exactly full when all data is written.
// If this is not true then either the buffer size calculation or
// the buffer serialization code is incorrect.
assert( bN - kHdrBodyByteN == 0 );
// BUG BUG BUG
// BUG BUG BUG: see comment in send_txt() for reason that this check is turned off
// BUG BUG BUG
//assert( bN == kHdrBodyByteN );
if( msgByteNRef != nullptr )
*msgByteNRef = byteN;
@ -919,21 +928,61 @@ namespace cw
}
}
rc_t send_txt( mdns_app_t* p )
{
rc_t rc = kOkRC;
unsigned bufByteN = 0;
unsigned transId = 0;
char* buf = alloc_msg( &bufByteN, transId, 0x8400, // 30-23-03-1b-b6-f9
kAnswerRecdTId, "MC Mix - 1._EuConProxy._tcp.local", kTXT_DnsTId, kFlushClassFl | kInClassFl, 4500, 0, "lmac=38-C9-86-37-44-E7\nhost=mbp19\nhmac=BE-BD-EA-31-F9-88\ndummy=1",
kInvalidRecdTId );
//print_hex(buf,bufByteN);
//parse_msg( nullptr, buf, bufByteN );
// BUG BUG BUG BUG
// BUG BUG BUG BUG: if all was well should not need to subtract 1 from bufByteN - this is related to turning off the final size assert() in alloc_msgv
// BUG BUG BUG BUG
send( srv::socketHandle(p->mdnsH), buf, bufByteN-1, "224.0.0.251", 5353 );
free(buf);
return rc;
}
void udpReceiveCallback( void* arg, const void* data, unsigned dataByteCnt, const struct sockaddr_in* fromAddr )
{
mdns_app_t* p = static_cast<mdns_app_t*>(arg);
char addrBuf[ INET_ADDRSTRLEN ];
socket::addrToString( fromAddr, addrBuf, INET_ADDRSTRLEN );
p->cbN += 1;
if( false )
{
printf("%i bytes:%i %s\n", p->cbN, dataByteCnt, addrBuf );
print_hex( (const char*)data, dataByteCnt );
parse_msg(&p->mdns,data,dataByteCnt);
}
if( dataByteCnt > 0 )
{
uint16_t* u = (uint16_t*)data;
uint8_t* b = (uint8_t*)data;
if( u[1]==0 && u[2] == 1 && b[12] == 0x0a )
{
printf("dataByteCnt:%i\n",dataByteCnt);
if( dataByteCnt == 51 )
printf("MATCH!\n");
}
}
rc_t send_response( mdns_app_t* app, socket::handle_t sockH )
}
rc_t send_response1( mdns_app_t* app, socket::handle_t sockH )
{
rc_t rc = kOkRC;
@ -945,7 +994,7 @@ namespace cw
unsigned char buf[] =
{ 0x0b,0x00,0x00,0x00,0x00,0x00,0x00,0x50,0x00,0x02,0x03,0xfc,0x01,0x05,
0x06,0x00,
0x98,0x5a,0xeb,0x89,0xba,0xaa,
0x38,0xc9,0x86,0x37,0x44,0xe7,
0x01,0x00,
0xc0,0xa8,0x00,0x44,
0x00,0x00,
@ -964,13 +1013,28 @@ namespace cw
return rc;
}
rc_t send_response2( mdns_app_t* app, socket::handle_t sockH )
{
rc_t rc = kOkRC;
unsigned char buf[] =
{ 0x0d,0x00,0x00,0x00,0x00,0x00,0x00,0x08 };
unsigned bufByteN = sizeof(buf);
if((rc = socket::send( sockH, buf, bufByteN )) != kOkRC )
{
error(&app->mdns,"Send failed.");
}
return rc;
}
bool tcpReceiveCallback( void* arg )
{
mdns_app_t* app = static_cast<mdns_app_t*>(arg);
socket::handle_t sockH = app->tcpH;
char buf[ app->recvBufByteN ];
unsigned readByteN = 0;
unsigned msg_idx = 0;
rc_t rc = kOkRC;
if( !socket::isConnected(sockH) )
@ -982,25 +1046,68 @@ namespace cw
}
else
{
if((rc = socket::recieve( sockH, buf, app->recvBufByteN, &readByteN, nullptr )) == kOkRC )
if((rc = socket::recieve( sockH, buf, app->recvBufByteN, &readByteN, nullptr )) == kOkRC || rc == kTimeOutRC )
{
printf("msg: %i\n",msg_idx++);
//printf(".");
//fflush(stdout);
//printf("msg: %i\n",msg_idx++);
//print_hex(buf,readByteN);
if( readByteN > 0 )
if( readByteN > 0 && app->protocolState == 0)
{
send_response( app, sockH );
if( app->protocolState == 0 )
send_response1( app, sockH );
app->protocolState += 1;
printf("PROTO:%i\n",app->protocolState);
}
else
{
if( app->protocolState == 1 )
{
send_response2( app, sockH );
app->protocolState += 1;
printf("PROTO:%i\n",app->protocolState);
}
else
{
if( app->protocolState == 2 )
{
time::get(app->t0);
//send_txt(app);
app->protocolState+=1;
printf("PROTO:%i\n",app->protocolState);
}
else
{
if( app->protocolState > 2 && app->txtXmtN < 20 )
{
time::spec_t t1;
time::get(t1);
if( time::elapsedMs( &app->t0, &t1 ) >= 2500 )
{
//send_txt(app);
app->txtXmtN+=1;
printf("TXT:%i\n",app->txtXmtN);
app->t0 = t1;
}
}
}
}
}
// if the server disconnects then recvBufByteN
if( isConnected( sockH ) )
{
log(&app->mdns,"TCP disconnected.");
//log(&app->mdns,"TCP disconnected.");
}
else
{
// handle recv'd TCP messages here.
send_response( app, sockH );
//send_response( app, sockH );
}
}
@ -1009,7 +1116,6 @@ namespace cw
}
rc_t sendMsg1( mdns_app_t* p )
\
{
rc_t rc = kOkRC;
unsigned transId = 0;
@ -1027,12 +1133,14 @@ namespace cw
}
else
{
//const char* mac = "985AEB89BAAA"
// wifi: 98 5A EB 89 BA AA "985AEB89BAAA" 98-5A-EB-89-BA-AA
// enet: 38 C9 86 37 44 E7 "38C9863744E7" 38-C9-86-37-44-E7
char* buf = alloc_msg( &bufByteN, transId, flags,
kQuestionRecdTId, "68.0.168.192.in-addr.arpa", kANY_DnsTId, kInClassFl, 0, 0, nullptr,
kQuestionRecdTId, "Euphonix-MC-985AEB89BAAA.local", kANY_DnsTId, kInClassFl, 0, 0, nullptr,
kNameServerRecdTId, "Euphonix-MC-985AEB89BAAA.local", kA_DnsTId, kInClassFl, ttl, addr.sin_addr, nullptr,
kNameServerRecdTId, "68.0.168.192.in-addr.arpa", kPTR_DnsTId, kInClassFl, ttl, 43, "Euphonix-MC-985AEB89BAAA.local",
kQuestionRecdTId, "Euphonix-MC-38C9863744E7.local", kANY_DnsTId, kInClassFl, 0, 0, nullptr,
kNameServerRecdTId, "Euphonix-MC-38C9863744E7.local", kA_DnsTId, kInClassFl, ttl, addr.sin_addr, nullptr,
kNameServerRecdTId, "68.0.168.192.in-addr.arpa", kPTR_DnsTId, kInClassFl, ttl, 43, "Euphonix-MC-38C9863744E7.local",
kInvalidRecdTId );
//print_hex(buf,bufByteN);
@ -1068,8 +1176,8 @@ namespace cw
char* buf0 = alloc_msg( &bufByteN, transId, 0,
kQuestionRecdTId, "MC Mix - 1._EuConProxy._tcp.local", kANY_DnsTId, kInClassFl, 0, 0, nullptr,
kNameServerRecdTId, "\xc0\x0c", kSRV_DnsTId, kInClassFl, 120, 49168, "Euphonix-MC-985AEB89BAAA.local",
kNameServerRecdTId, "\xc0\x0c", kTXT_DnsTId, kInClassFl, 4500, 0, "lmac=98-5A-EB-89-BA-AA\ndummy=0",
kNameServerRecdTId, "\xc0\x0c", kSRV_DnsTId, kInClassFl, 120, 49168, "Euphonix-MC-38C9863744E7.local",
kNameServerRecdTId, "\xc0\x0c", kTXT_DnsTId, kInClassFl, 4500, 0, "lmac=38-C9-86-37-44-E7\ndummy=0",
kInvalidRecdTId );
//print_hex(buf0,bufByteN);
@ -1081,23 +1189,13 @@ namespace cw
bufByteN = 0;
char* buf = alloc_msg( &bufByteN, transId, flags,
kAnswerRecdTId, "MC Mix - 1._EuConProxy._tcp.local", kSRV_DnsTId, kFlushClassFl | kInClassFl, 120, 49168, "Euphonix-MC-985AEB89BAAA.local",
kAnswerRecdTId, "MC Mix - 1._EuConProxy._tcp.local", kSRV_DnsTId, kFlushClassFl | kInClassFl, 120, 49168, "Euphonix-MC-38C9863744E7.local",
kAnswerRecdTId, "\xc0\x3f", kA_DnsTId, kFlushClassFl | kInClassFl, 120, addr.sin_addr, nullptr,
kAnswerRecdTId, "\xc0\x17", kPTR_DnsTId, kInClassFl, 4500, 0, "\xc0\x0c",
kAnswerRecdTId, "\xc0\x0c", kTXT_DnsTId, kFlushClassFl | kInClassFl, 4500, 0, "lmac=98-5A-EB-89-BA-AA\ndummy=1",
kAnswerRecdTId, "\xc0\x0c", kTXT_DnsTId, kFlushClassFl | kInClassFl, 4500, 0, "lmac=38-C9-86-37-44-E7\ndummy=1",
kAnswerRecdTId, "_services._dns-sd._udp.local", kPTR_DnsTId, kInClassFl, 4500, 0, "\xc0\x17",
kInvalidRecdTId );
/* working with 1
char* buf = alloc_msg( &bufByteN, transId, flags,
kAnswerRecdTId, "MC Mix._EuConProxy._tcp.local", kSRV_DnsTId, kFlushClassFl | kInClassFl, 120, 49168, "Euphonix-MC-985AEB89BAAA.local",
kAnswerRecdTId, "\xc0\x3b", kA_DnsTId, kFlushClassFl | kInClassFl, 120, addr.sin_addr, nullptr,
kAnswerRecdTId, "\xc0\x13", kPTR_DnsTId, kInClassFl, 4500, 0, "\xc0\x0c",
kAnswerRecdTId, "\xc0\x0c", kTXT_DnsTId, kFlushClassFl | kInClassFl, 4500, 0, "lmac=98-5A-EB-89-BA-AA\ndummy=1",
kAnswerRecdTId, "_services._dns-sd._udp.local", kPTR_DnsTId, kInClassFl, 4500, 0, "\xc0\x13",
kInvalidRecdTId );
*/
//print_hex(buf,bufByteN);
//parse_msg( nullptr, buf, bufByteN );
@ -1166,6 +1264,8 @@ cw::rc_t cw::net::mdns::test()
app.cbN = 0;
app.recvBufByteN = 4096;
app.protocolState = 0;
app.txtXmtN = 0;
// create the mDNS UDP socket server
if((rc = srv::create(
@ -1191,7 +1291,7 @@ cw::rc_t cw::net::mdns::test()
if((rc = set_multicast_time_to_live( socketHandle(app.mdnsH), 255 )) != kOkRC )
goto errLabel;
// create the mDNS TCP socket
// create the TCP socket
if((rc = socket::create(
app.tcpH,
tcpPort,
@ -1224,7 +1324,8 @@ cw::rc_t cw::net::mdns::test()
{
if( strcmp(sbuf,"msg0\n") == 0 )
{
testAllocMsg(sbuf);
//testAllocMsg(sbuf);
send_txt(&app);
break;
}