Copyright (C) 2012 Paul Davis
Using code from Rui Nuno Capela's qmidinet as inspiration.
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
#endif
#if defined(PLATFORM_WINDOWS)
#include <winsock2.h>
+#include <ws2tcpip.h>
#else
#include <netdb.h>
#endif
#if defined(PLATFORM_WINDOWS)
-static WSADATA g_wsaData;
typedef int socklen_t;
#else
#include <unistd.h>
int
IPMIDIPort::selectable () const
-{
- return sockin;
+{
+ return sockin;
}
XMLNode&
::closesocket (sockin);
sockin = -1;
}
-
+
if (sockout >= 0) {
::closesocket (sockout);
sockout = -1;
}
}
-static bool
+#ifndef PLATFORM_WINDOWS
+static bool
get_address (int sock, struct in_addr *inaddr, const string& ifname )
{
// Get interface address from supplied name.
-#if !defined(PLATFORM_WINDOWS)
struct ifreq ifr;
::strncpy(ifr.ifr_name, ifname.c_str(), sizeof(ifr.ifr_name));
inaddr->s_addr = sa.sin_addr.s_addr;
return true;
-
-#else
-
- return false;
-
-#endif // !PLATFORM_WINDOWS'
}
+#endif
bool
IPMIDIPort::open_sockets (int base_port, const string& ifname)
{
-#if !defined(PLATFORM_WINDOWS)
int protonum = 0;
struct protoent *proto = ::getprotobyname("IP");
addrin.sin_family = AF_INET;
addrin.sin_addr.s_addr = htonl(INADDR_ANY);
addrin.sin_port = htons(base_port);
-
+
if (::bind(sockin, (struct sockaddr *) (&addrin), sizeof(addrin)) < 0) {
::perror("bind");
return false;
}
-
+
// Will Hall, 2007
// INADDR_ANY will bind to default interface,
// specify alternate interface nameon which to bind...
struct in_addr if_addr_in;
+#ifndef PLATFORM_WINDOWS
if (!ifname.empty()) {
if (!get_address(sockin, &if_addr_in, ifname)) {
error << string_compose ("socket(in): could not find interface address for %1", ifname) << endmsg;
} else {
if_addr_in.s_addr = htonl (INADDR_ANY);
}
-
+#else
+ if_addr_in.s_addr = htonl (INADDR_ANY);
+#endif
+
struct ip_mreq mreq;
- mreq.imr_multiaddr.s_addr = ::inet_addr("225.0.0.37");
+ mreq.imr_multiaddr.s_addr = ::inet_addr("225.0.0.37"); /* ipMIDI group multicast address */
mreq.imr_interface.s_addr = if_addr_in.s_addr;
if(::setsockopt (sockin, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq, sizeof(mreq)) < 0) {
::perror("setsockopt(IP_ADD_MEMBERSHIP)");
::perror("socket(out)");
return false;
}
-
+
// Will Hall, Oct 2007
+#ifndef PLATFORM_WINDOWS
if (!ifname.empty()) {
struct in_addr if_addr_out;
if (!get_address(sockout, &if_addr_out, ifname)) {
return false;
}
}
-
+#endif
+
::memset(&addrout, 0, sizeof(struct sockaddr_in));
addrout.sin_family = AF_INET;
addrout.sin_addr.s_addr = ::inet_addr("225.0.0.37");
addrout.sin_port = htons (base_port);
-
+
// Turn off loopback...
int loop = 0;
- if (::setsockopt(sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
+
+#ifdef PLATFORM_WINDOWS
+
+ /* https://msdn.microsoft.com/en-us/library/windows/desktop/ms739161%28v=vs.85%29.aspx
+ *
+ * ------------------------------------------------------------------------------
+ * Note The Winsock version of the IP_MULTICAST_LOOP option is
+ * semantically different than the UNIX version of the
+ * IP_MULTICAST_LOOP option:
+ *
+ * In Winsock, the IP_MULTICAST_LOOP option applies only to the receive path.
+ * In the UNIX version, the IP_MULTICAST_LOOP option applies to the send path.
+ *
+ * For example, applications ON and OFF (which are easier to track than
+ * X and Y) join the same group on the same interface; application ON
+ * sets the IP_MULTICAST_LOOP option on, application OFF sets the
+ * IP_MULTICAST_LOOP option off. If ON and OFF are Winsock
+ * applications, OFF can send to ON, but ON cannot sent to OFF. In
+ * contrast, if ON and OFF are UNIX applications, ON can send to OFF,
+ * but OFF cannot send to ON.
+ * ------------------------------------------------------------------------------
+ *
+ * Alles klar? Gut!
+ */
+
+ const int target_sock = sockin;
+#else
+ const int target_sock = sockout;
+#endif
+
+ if (::setsockopt (target_sock, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
::perror("setsockopt(IP_MULTICAST_LOOP)");
return false;
}
+#ifndef PLATFORM_WINDOWS
+
if (fcntl (sockin, F_SETFL, O_NONBLOCK)) {
error << "cannot set non-blocking mode for IP MIDI input socket (" << ::strerror (errno) << ')' << endmsg;
return false;
error << "cannot set non-blocking mode for IP MIDI output socket (" << ::strerror (errno) << ')' << endmsg;
return false;
}
-
- return true;
+
#else
- return false;
-#endif // !PLATFORM_WINDOWS'
+ // If imode !=0, non-blocking mode is enabled.
+ u_long mode=1;
+ if (ioctlsocket(sockin,FIONBIO,&mode)) {
+ error << "cannot set non-blocking mode for IP MIDI input socket (" << ::strerror (errno) << ')' << endmsg;
+ return false;
+ }
+ mode = 1; /* just in case it was modified in the previous call */
+ if (ioctlsocket(sockout,FIONBIO,&mode)) {
+ error << "cannot set non-blocking mode for IP MIDI output socket (" << ::strerror (errno) << ')' << endmsg;
+ return false;
+ }
+#endif
+
+ return true;
}
int
}
void
-IPMIDIPort::parse (framecnt_t timestamp)
+IPMIDIPort::parse (samplecnt_t timestamp)
{
/* input was detected on the socket, so go get it and hand it to the
* parser. This will emit appropriate signals that will be handled
* by anyone who cares.
*/
-
+
unsigned char buf[1024];
struct sockaddr_in sender;
socklen_t slen = sizeof(sender);
if (r >= 0) {
_parser->set_timestamp (timestamp);
-
+
for (int i = 0; i < r; ++i) {
_parser->scanner (buf[i]);
}
::perror ("failed to recv from socket");
}
}
-