Select interface to use

Start miraclecast against interface of choose.

- By tagged udev device
- By `--interface` or `-i` option

resolves #36, resolves #43, resolves #46

CMakeLists.txt

@@ -13,6 +13,7 @@ add_subdirectory(test)
 
 SET(BUILD_BINDIR "${CMAKE_INSTALL_PREFIX}/bin")
 OPTION(BUILD_ENABLE_DEBUG "Enable Debug" ON )
+OPTION(RELY_UDEV "Rely in udev tag to select device" OFF )
 OPTION(BUILD_TESTS "Enable TEST" ON )
 
 SET(PACKAGE_NAME miraclecast)

README.md

@@ -30,7 +30,6 @@ The MiracleCast projects requires the following software to be installed:
 
 To compile MiracleCast, you can choose from [autotools](http://en.wikipedia.org/wiki/GNU_build_system) or [cmake](http://en.wikipedia.org/wiki/CMake):
 
-
 Autotools:
 
     $ ./autogen.sh
@@ -56,6 +55,14 @@ Install
 
     $ sudo make install
 
+## Automatic interface selection with udev
+
+If you want to select the interface to start miraclecast with, add a udev rule with the script [res/write-udev-rule.sh](https://github.com/albfan/miraclecast/blob/master/res/write-udev-rule.sh) and configure miraclecast with
+
+    $ ../configure --enable-rely-udev
+
+You can also choose the interface with  `--interface` option for miracle-wifid.
+
 ### Ubuntu
 
 This specific linux flavour is so hard to get miraclecast dependencies that an alternative repo was created to install systemd with dbus

common.am

@@ -11,7 +11,6 @@ AM_CFLAGS = -Wall \
 AM_CPPFLAGS = -include $(top_builddir)/config.h \
 	-I $(top_srcdir)/src \
 	-I $(top_srcdir)/src/shared \
-	-DBUILD_ENABLE_DEBUG \
 	'-DBUILD_BINDIR="$(bindir)"'
 
 AM_LDFLAGS = -Wl,--as-needed \

configure.ac

@@ -36,6 +36,10 @@ AC_PROG_AWK
 LT_PREREQ(2.2)
 LT_INIT
 
+AC_ARG_ENABLE([rely-udev],
+              AS_HELP_STRING([--enable-rely-udev], [Use tagged device with miraclecast]), AC_DEFINE([RELY_UDEV], [], [Rely on udev to find miraclecast device]))
+AC_ARG_ENABLE([log-debug],
+                  AS_HELP_STRING([--disable-log-debug], [Disable log debug]), , AC_DEFINE([BUILD_ENABLE_DEBUG], [], [Enable debug log level]))
 #
 # Mandatory dependencies
 #

res/write-udev-rule.sh

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-./kill-wpa.sh
-
 . miracle-utils.sh
 
 ETHER_NAMES=$(find_choosable_networknames)
@@ -17,7 +15,7 @@ then
    ETHERNAME="$ETHER_NAMES"
 elif [ 2 -le $ETHER_COUNT ]
 then
-   echo choose device for normal connection:
+   echo choose device to use with miraclecast:
    QUIT="exit"
    select et_name in $ETHER_NAMES $QUIT
    do
@@ -42,11 +40,16 @@ then
    done
 fi
 
-# default path for config file
+read -p "Provide order to udev rule (default 10): " -e -i 10 ORDER
-CONFIG_FILE=${1:-/run/network/wpa_supplicant_${ETHERNAME}.conf}
 
-NUMBER=10
+RULE_FILE="/etc/udev/rules.d/${ORDER}-network.rules"
 
-cat > /etc/udev/rules.d/${NUMBER}-network.rules << EOF
+echo "...Press enter to finish (sorry, don't know why. It is related with sudo tee)"
+
+cat | sudo tee "${RULE_FILE}" &>/dev/null <<-EOF
 	SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="$(cat /sys/class/net/${ETHERNAME}/address)", NAME="${ETHERNAME}", TAGS+="miracle"
 EOF
+
+echo file "${RULE_FILE}" writed
+
+cat "${RULE_FILE}"

src/shared/shl_log.c

@@ -112,6 +112,7 @@ static void log__submit(const char *file,
  */
 
 static const char *log__sev2str[LOG_SEV_NUM] = {
+	[LOG_TRACE] = "TRACE",
 	[LOG_DEBUG] = "DEBUG",
 	[LOG_INFO] = "INFO",
 	[LOG_NOTICE] = "NOTICE",

src/wifi/wifid-supplicant.c

@@ -1199,7 +1199,7 @@ static void supplicant_event_p2p_group_started(struct supplicant *s,
 {
 	struct supplicant_peer *sp;
 	struct supplicant_group *g;
-	const char *mac, *ifname, *go;
+	const char *mac, *ssid, *ifname, *go;
 	bool is_go;
 	int r;
 
@@ -1210,6 +1210,11 @@ static void supplicant_event_p2p_group_started(struct supplicant *s,
 		return;
 	}
 
+	r = wpas_message_dict_read(ev, "ssid", 's', &ssid);
+	if (r == 0) {
+		log_debug("ssid: %s", ssid);
+	}
+
 	r = wpas_message_argv_read(ev, 0, 's', &ifname);
 	if (r < 0) {
 		log_debug("no ifname in P2P-GROUP-STARTED: %s",

src/wifi/wifid.c

@@ -40,9 +40,8 @@
 #include "wifid.h"
 #include "config.h"
 
-#define RELY_UDEV 0
-
 const char *arg_wpa_bindir = "/usr/bin";
+const char *interface_name = NULL;
 unsigned int arg_wpa_loglevel = LOG_NOTICE;
 
 /*
@@ -90,6 +89,10 @@ static void manager_add_udev_link(struct manager *m,
 	if (!ifname)
 		return;
 
+	if (interface_name && strcmp(interface_name, ifname)) {
+		return;
+	}
+
 	/* ignore dynamic p2p interfaces */
 	if (shl_startswith(ifname, "p2p-"))
 		return;
@@ -100,10 +103,15 @@ static void manager_add_udev_link(struct manager *m,
 
 	link_set_friendly_name(l, m->friendly_name);
 
-#if RELY_UDEV
+#ifdef RELY_UDEV
-	if (udev_device_has_tag(d, "miracle"))
+	if (udev_device_has_tag(d, "miracle")) {
+#else
+	if (!interface_name || !strcmp(interface_name, ifname)) {
 #endif
 		link_set_managed(l, true);
+	} else {
+		log_debug("ignored device: %s", ifname);
+	}
 }
 
 static int manager_udev_fn(sd_event_source *source,
@@ -132,19 +140,23 @@ static int manager_udev_fn(sd_event_source *source,
 		if (l)
 			link_free(l);
 	} else if (l) {
-		if (action && !strcmp(action, "move")) {
 		ifname = udev_device_get_property_value(d, "INTERFACE");
+		if (action && !strcmp(action, "move")) {
 			if (ifname)
 				link_renamed(l, ifname);
 		}
 
-#if RELY_UDEV
+#ifdef RELY_UDEV
 		if (udev_device_has_tag(d, "miracle"))
 			link_set_managed(l, true);
 		else
 			link_set_managed(l, false);
 #else
+		if (!interface_name || !strcmp(interface_name, ifname)) {
 			link_set_managed(l, true);
+		} else {
+			log_debug("ignored device: %s", ifname);
+		}
 #endif
 	} else {
 		manager_add_udev_link(m, d);
@@ -443,8 +455,10 @@ static int help(void)
 	       "     --log-level <lvl>     Maximum level for log messages\n"
 	       "     --log-time            Prefix log-messages with timestamp\n"
 	       "\n"
+	       "  -i --interface           Choose the interface to use\n"
+	       "\n"
 	       "     --wpa-bindir <dir>    wpa_supplicant binary dir [/usr/bin]\n"
-	       "     --wpa-loglevel <lvl>     wpa_supplicant log-level\n"
+	       "     --wpa-loglevel <lvl   wpa_supplicant log-level\n"
 	       , program_invocation_short_name);
 	/*
 	 * 80-char barrier:
@@ -472,14 +486,18 @@ static int parse_argv(int argc, char *argv[])
 
 		{ "wpa-bindir",		required_argument,	NULL,	ARG_WPA_BINDIR },
 		{ "wpa-loglevel",	required_argument,	NULL,	ARG_WPA_LOGLEVEL },
+		{ "interface",	required_argument,	NULL,	'i' },
 		{}
 	};
 	int c;
 
-	while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+	while ((c = getopt_long(argc, argv, "hi:", options, NULL)) >= 0) {
 		switch (c) {
 		case 'h':
 			return help();
+		case 'i':
+			interface_name = optarg;
+			break;
 		case ARG_VERSION:
 			puts(PACKAGE_STRING);
 			return 0;