scan: Refactor scan start details to scan.c

Move the implementation details of triggering wifi scans over netlink
to scan.c from wiphy.c.  No functionality is changed by this commit.

Makefile.am

@@ -53,6 +53,7 @@ src_iwd_SOURCES = src/main.c linux/nl80211.h linux/kdbus.h \
 					src/crypto.h src/crypto.c \
 					src/mpdu.h src/mpdu.c \
 					src/eapol.h src/eapol.c \
+					src/scan.h src/scan.c \
 					iwd.h
 src_iwd_LDADD = ell/libell-internal.la
 

src/scan.c

@@ -0,0 +1,49 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2015  Intel Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <ell/ell.h>
+
+#include "linux/nl80211.h"
+#include "src/iwd.h"
+#include "src/wiphy.h"
+#include "src/scan.h"
+
+void scan_start(struct l_genl_family *nl80211, uint32_t ifindex,
+		scan_func_t callback, void *user_data)
+{
+	struct l_genl_msg *msg;
+
+	msg = l_genl_msg_new_sized(NL80211_CMD_TRIGGER_SCAN, 16);
+	l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &ifindex);
+	l_genl_family_send(nl80211, msg, callback, user_data, NULL);
+	l_genl_msg_unref(msg);
+}

src/scan.h

@@ -0,0 +1,26 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2015  Intel Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+typedef void (*scan_func_t)(struct l_genl_msg *msg, void *user_data);
+
+void scan_start(struct l_genl_family *nl80211, uint32_t ifindex,
+		scan_func_t callback, void *user_data);

src/wiphy.c

@@ -37,6 +37,7 @@
 #include "src/ie.h"
 #include "src/wiphy.h"
 #include "src/dbus.h"
+#include "src/scan.h"
 
 static struct l_genl *genl = NULL;
 static struct l_genl_family *nl80211 = NULL;
@@ -390,17 +391,13 @@ static struct l_dbus_message *device_scan(struct l_dbus *dbus,
 						void *user_data)
 {
 	struct netdev *netdev = user_data;
-	struct l_genl_msg *msg;
 
 	if (netdev->pending)
 		return dbus_error_busy(message);
 
 	netdev->pending = l_dbus_message_ref(message);
 
-	msg = l_genl_msg_new_sized(NL80211_CMD_TRIGGER_SCAN, 16);
-	msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
-	l_genl_family_send(nl80211, msg, device_scan_callback, netdev, NULL);
-	l_genl_msg_unref(msg);
+	scan_start(nl80211, netdev->index, device_scan_callback, netdev);
 
 	return NULL;
 }