provide switches for TCP and unix sockets

autoconf flags for enabling and disabling TCP and unix domain socket
support.  Embedded machines without a TCP stack may be better off
without TCP support.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7236 09075e82-0dd4-0310-85a5-a0d7c8717e4f

configure.ac

@@ -65,6 +65,8 @@ AC_ARG_ENABLE(ao,[  --enable-ao             enable support for libao (default: d
 AC_ARG_ENABLE(shout,[  --disable-shout         disable support for streaming through shout (default: enable)],[enable_shout=$enableval],[enable_shout=yes])
 AC_ARG_ENABLE(iconv,[  --disable-iconv         disable iconv support (default: enable)],[enable_iconv=$enableval],[enable_iconv=yes])
 AC_ARG_ENABLE(ipv6,[  --disable-ipv6          disable IPv6 support (default: enable)],[enable_ipv6=$enableval],[enable_ipv6=yes])
+AC_ARG_ENABLE(tcp,[  --disable-tcp           disable support for clients connecting via TCP (default: enable)],[enable_tcp=$enableval],[enable_tcp=yes])
+AC_ARG_ENABLE(un,[  --enable-un             enable support for clients connecting via unix domain sockets (default: disable)],[enable_un=$enableval],[enable_un=no])
 AC_ARG_ENABLE(oss,[  --disable-oss           disable OSS support (default: enable)],[enable_oss=$enableval],[enable_oss=yes])
 AC_ARG_ENABLE(alsa,[  --disable-alsa          disable ALSA support (default: enable)],[enable_alsa=$enableval],[enable_alsa=yes])
 AC_ARG_ENABLE(jack,[  --disable-jack          disable jack support (default: enable)],[enable_jack=$enableval],[enable_jack=yes])
@@ -132,6 +134,11 @@ dnl AC_CHECK_HEADER(langinfo.h,[enable_langinfo=yes;AC_DEFINE(HAVE_LANGINFO,1,[D
 AM_LANGINFO_CODESET
 AC_CHECK_HEADER(locale.h,[enable_locale=yes;AC_DEFINE(HAVE_LOCALE,1,[Define if locale.h is present])],enable_locale=no)
 
+if test x$enable_tcp = xno; then
+	# if we don't support TCP, we don't need IPv6 either
+	enable_ipv6=no
+fi
+
 if test x$enable_ipv6 = xyes; then
 	AC_MSG_CHECKING(for ipv6)
 	AC_EGREP_CPP([AP_maGiC_VALUE],
@@ -151,6 +158,14 @@ AP_maGiC_VALUE
 )
 fi
 
+if test x$enable_tcp = xyes; then
+	AC_DEFINE(HAVE_TCP, 1, [Define if TCP socket support is enabled])
+fi
+
+if test x$enable_un = xyes; then
+	AC_DEFINE(HAVE_UN, 1, [Define if unix domain socket support is enabled])
+fi
+
 enable_osx=no
 case $host in
 	*-darwin*)
@@ -638,6 +653,27 @@ echo ""
 echo "########### MPD CONFIGURATION ############"
 echo ""
 
+echo " Client Support:"
+if test x$enable_tcp = xyes; then
+	echo " TCP support ...................enabled"
+else
+	echo " TCP support ...................disabled"
+fi
+
+if test x$enable_un = xyes; then
+	echo " Unix domain socket support ....enabled"
+else
+	echo " Unix domain socket support ....disabled"
+fi
+
+echo ""
+
+if
+	test x$enable_tcp = xno &&
+	test x$enable_un = xno; then
+	AC_MSG_ERROR([No client interfaces configured!])
+fi
+
 echo " Playback Support:"
 if test x$enable_ao = xyes; then
 	echo " libao support .................enabled"

src/interface.c

@@ -245,6 +245,7 @@ void openAInterface(int fd, struct sockaddr *addr)
 	} else {
 		const char *hostname;
 		switch (addr->sa_family) {
+#ifdef HAVE_TCP
 		case AF_INET:
 			hostname = (const char *)inet_ntoa(((struct sockaddr_in *)
 			                                    addr)->sin_addr);
@@ -267,9 +268,12 @@ void openAInterface(int fd, struct sockaddr *addr)
 			}
 			break;
 #endif
+#endif /* HAVE_TCP */
+#ifdef HAVE_UN
 		case AF_UNIX:
 			hostname = "local connection";
 			break;
+#endif /* HAVE_UN */
 		default:
 			hostname = "unknown";
 		}

src/listen.c

@@ -74,6 +74,7 @@ static int establishListen(const struct sockaddr *addrp, socklen_t addrlen)
 	int allowReuse = ALLOW_REUSE;
 
 	switch (addrp->sa_family) {
+#ifdef HAVE_TCP
 	case AF_INET:
 		pf = PF_INET;
 		break;
@@ -82,9 +83,12 @@ static int establishListen(const struct sockaddr *addrp, socklen_t addrlen)
 		pf = PF_INET6;
 		break;
 #endif
+#endif /* HAVE_TCP */
+#ifdef HAVE_UN
 	case AF_UNIX:
 		pf = PF_UNIX;
 		break;
+#endif /* HAVE_UN */
 	default:
 		FATAL("unknown address family: %i\n", addrp->sa_family);
 	}
@@ -123,6 +127,7 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
 {
 	const struct sockaddr *addrp;
 	socklen_t addrlen;
+#ifdef HAVE_TCP
 	struct sockaddr_in sin4;
 #ifdef HAVE_IPV6
 	struct sockaddr_in6 sin6;
@@ -135,8 +140,10 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
 	memset(&sin4, 0, sizeof(struct sockaddr_in));
 	sin4.sin_port = htons(port);
 	sin4.sin_family = AF_INET;
+#endif /* HAVE_TCP */
 
 	if (!param || 0 == strcmp(param->value, "any")) {
+#ifdef HAVE_TCP
 		DEBUG("binding to any address\n");
 #ifdef HAVE_IPV6
 		if (useIpv6) {
@@ -157,6 +164,10 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
 #endif
 			BINDERROR();
 		}
+#else /* HAVE_TCP */
+		FATAL("TCP support is disabled\n");
+#endif /* HAVE_TCP */
+#ifdef HAVE_UN
 	} else if (param->value[0] == '/') {
 		size_t path_length;
 		struct sockaddr_un sun;
@@ -173,7 +184,9 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
 
 		if (establishListen(addrp, addrlen) < 0)
 			BINDERROR();
+#endif /* HAVE_UN */
 	} else {
+#ifdef HAVE_TCP
 		struct hostent *he;
 		DEBUG("binding to address for %s\n", param->value);
 		if (!(he = gethostbyname(param->value))) {
@@ -207,6 +220,9 @@ static void parseListenConfigParam(unsigned int port, ConfigParam * param)
 
 		if (establishListen(addrp, addrlen) < 0)
 			BINDERROR();
+#else /* HAVE_TCP */
+		FATAL("TCP support is disabled\n");
+#endif /* HAVE_TCP */
 	}
 }
 

src/os_compat.h

@@ -64,7 +64,6 @@
 #include <netdb.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <sys/un.h>
 #include <pwd.h>
 #include <grp.h>
 #include <limits.h>
@@ -75,4 +74,8 @@
 #include <sys/ipc.h>
 #include <sys/shm.h>
 
+#ifdef HAVE_UN
+#include <sys/un.h>
+#endif
+
 #endif /* OS_COMPAT_H */