driver_nl80211/wext: Share netlink operstate send function

As an initial step in sharing netlink helper functions among driver
wrappers, create a new file for netlink code and move operstate send
function there.

src/drivers/driver_nl80211.c

@@ -28,10 +28,11 @@
 #include "nl80211_copy.h"
 
 #include "common.h"
-#include "radiotap.h"
-#include "radiotap_iter.h"
 #include "eloop.h"
 #include "common/ieee802_11_defs.h"
+#include "netlink.h"
+#include "radiotap.h"
+#include "radiotap_iter.h"
 #include "driver.h"
 
 #ifdef CONFIG_LIBNL20
@@ -303,68 +304,6 @@ static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 #endif /* HOSTAPD */
 
 
-static int wpa_driver_nl80211_send_oper_ifla(
-	struct wpa_driver_nl80211_data *drv,
-	int linkmode, int operstate)
-{
-	struct {
-		struct nlmsghdr hdr;
-		struct ifinfomsg ifinfo;
-		char opts[16];
-	} req;
-	struct rtattr *rta;
-	static int nl_seq;
-	ssize_t ret;
-
-	os_memset(&req, 0, sizeof(req));
-
-	req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.hdr.nlmsg_type = RTM_SETLINK;
-	req.hdr.nlmsg_flags = NLM_F_REQUEST;
-	req.hdr.nlmsg_seq = ++nl_seq;
-	req.hdr.nlmsg_pid = 0;
-
-	req.ifinfo.ifi_family = AF_UNSPEC;
-	req.ifinfo.ifi_type = 0;
-	req.ifinfo.ifi_index = drv->ifindex;
-	req.ifinfo.ifi_flags = 0;
-	req.ifinfo.ifi_change = 0;
-
-	if (linkmode != -1) {
-		rta = aliasing_hide_typecast(
-			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
-			struct rtattr);
-		rta->rta_type = IFLA_LINKMODE;
-		rta->rta_len = RTA_LENGTH(sizeof(char));
-		*((char *) RTA_DATA(rta)) = linkmode;
-		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
-			RTA_LENGTH(sizeof(char));
-	}
-	if (operstate != -1) {
-		rta = aliasing_hide_typecast(
-			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
-			struct rtattr);
-		rta->rta_type = IFLA_OPERSTATE;
-		rta->rta_len = RTA_LENGTH(sizeof(char));
-		*((char *) RTA_DATA(rta)) = operstate;
-		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
-			RTA_LENGTH(sizeof(char));
-	}
-
-	wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
-		   linkmode, operstate);
-
-	ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
-	if (ret < 0) {
-		wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
-			   " %s (assume operstate is not supported)",
-			   strerror(errno));
-	}
-
-	return ret < 0 ? -1 : 0;
-}
-
-
 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 {
 	struct wpa_driver_nl80211_data *drv = priv;
@@ -500,7 +439,8 @@ static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data
 	if (drv->operstate == 1 &&
 	    (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 	    !(ifi->ifi_flags & IFF_RUNNING))
-		wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
+		netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
+				       -1, IF_OPER_UP);
 
 	_nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 
@@ -1369,7 +1309,8 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
 	if (wpa_driver_nl80211_capa(drv))
 		return -1;
 
-	wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
+	netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
+			       1, IF_OPER_DORMANT);
 #endif /* HOSTAPD */
 
 	return 0;
@@ -1448,7 +1389,8 @@ static void wpa_driver_nl80211_deinit(void *priv)
 	wpa_driver_nl80211_free_bss(drv);
 #endif /* HOSTAPD */
 
-	wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
+	netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
+			       0, IF_OPER_UP);
 
 	if (drv->link_event_sock >= 0) {
 		eloop_unregister_read_sock(drv->link_event_sock);
@@ -3767,8 +3709,9 @@ static int wpa_driver_nl80211_set_operstate(void *priv, int state)
 	wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
 		   __func__, drv->operstate, state, state ? "UP" : "DORMANT");
 	drv->operstate = state;
-	return wpa_driver_nl80211_send_oper_ifla(
-		drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
+	return netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
+				      -1,
+				      state ? IF_OPER_UP : IF_OPER_DORMANT);
 }
 
 

src/drivers/driver_wext.c

@@ -24,12 +24,13 @@
 
 #include "wireless_copy.h"
 #include "common.h"
-#include "driver.h"
 #include "eloop.h"
-#include "priv_netlink.h"
-#include "driver_wext.h"
 #include "common/ieee802_11_defs.h"
 #include "common/wpa_common.h"
+#include "priv_netlink.h"
+#include "netlink.h"
+#include "driver.h"
+#include "driver_wext.h"
 
 
 static int wpa_driver_wext_flush_pmkid(void *priv);
@@ -39,66 +40,6 @@ static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
 
 
-static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
-					  int linkmode, int operstate)
-{
-	struct {
-		struct nlmsghdr hdr;
-		struct ifinfomsg ifinfo;
-		char opts[16];
-	} req;
-	struct rtattr *rta;
-	static int nl_seq;
-	ssize_t ret;
-
-	os_memset(&req, 0, sizeof(req));
-
-	req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-	req.hdr.nlmsg_type = RTM_SETLINK;
-	req.hdr.nlmsg_flags = NLM_F_REQUEST;
-	req.hdr.nlmsg_seq = ++nl_seq;
-	req.hdr.nlmsg_pid = 0;
-
-	req.ifinfo.ifi_family = AF_UNSPEC;
-	req.ifinfo.ifi_type = 0;
-	req.ifinfo.ifi_index = drv->ifindex;
-	req.ifinfo.ifi_flags = 0;
-	req.ifinfo.ifi_change = 0;
-
-	if (linkmode != -1) {
-		rta = aliasing_hide_typecast(
-			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
-			struct rtattr);
-		rta->rta_type = IFLA_LINKMODE;
-		rta->rta_len = RTA_LENGTH(sizeof(char));
-		*((char *) RTA_DATA(rta)) = linkmode;
-		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
-			RTA_LENGTH(sizeof(char));
-	}
-	if (operstate != -1) {
-		rta = (struct rtattr *)
-			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
-		rta->rta_type = IFLA_OPERSTATE;
-		rta->rta_len = RTA_LENGTH(sizeof(char));
-		*((char *) RTA_DATA(rta)) = operstate;
-		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
-			RTA_LENGTH(sizeof(char));
-	}
-
-	wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
-		   linkmode, operstate);
-
-	ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
-	if (ret < 0) {
-		wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
-			   "%s (assume operstate is not supported)",
-			   strerror(errno));
-	}
-
-	return ret < 0 ? -1 : 0;
-}
-
-
 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
 				   int idx, u32 value)
 {
@@ -712,7 +653,8 @@ static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
 	if (drv->operstate == 1 &&
 	    (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 	    !(ifi->ifi_flags & IFF_RUNNING))
-		wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
+		netlink_send_oper_ifla(drv->event_sock, drv->ifindex,
+				       -1, IF_OPER_UP);
 
 	nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 
@@ -1023,7 +965,8 @@ static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
 		wpa_driver_wext_alternative_ifindex(drv, ifname2);
 	}
 
-	wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
+	netlink_send_oper_ifla(drv->event_sock, drv->ifindex,
+			       1, IF_OPER_DORMANT);
 
 	return 0;
 }
@@ -1051,7 +994,7 @@ void wpa_driver_wext_deinit(void *priv)
 	 */
 	wpa_driver_wext_disconnect(drv);
 
-	wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
+	netlink_send_oper_ifla(drv->event_sock, drv->ifindex, 0, IF_OPER_UP);
 
 	eloop_unregister_read_sock(drv->event_sock);
 	if (drv->mlme_sock >= 0)
@@ -2360,8 +2303,9 @@ int wpa_driver_wext_set_operstate(void *priv, int state)
 	wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
 		   __func__, drv->operstate, state, state ? "UP" : "DORMANT");
 	drv->operstate = state;
-	return wpa_driver_wext_send_oper_ifla(
-		drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
+	return netlink_send_oper_ifla(drv->event_sock, drv->ifindex,
+				      -1,
+				      state ? IF_OPER_UP : IF_OPER_DORMANT);
 }
 
 

src/drivers/drivers.mak

@@ -25,6 +25,7 @@ DRV_OBJS += ../src/drivers/driver_nl80211.o
 DRV_OBJS += ../src/utils/radiotap.o
 NEED_SME=y
 NEED_AP_MLME=y
+NEED_NETLINK=y
 DRV_LIBS += -lnl
 
 ifdef CONFIG_LIBNL20
@@ -67,6 +68,7 @@ endif
 ifdef CONFIG_DRIVER_WEXT
 DRV_WPA_CFLAGS += -DCONFIG_DRIVER_WEXT
 CONFIG_WIRELESS_EXTENSION=y
+NEED_NETLINK=y
 endif
 
 ifdef CONFIG_DRIVER_HERMES
@@ -148,6 +150,10 @@ DRV_WPA_CFLAGS += -DCONFIG_WIRELESS_EXTENSION
 DRV_WPA_OBJS += ../src/drivers/driver_wext.o
 endif
 
+ifdef NEED_NETLINK
+DRV_OBJS += ../src/drivers/netlink.o
+endif
+
 ##### COMMON VARS
 DRV_BOTH_CFLAGS := $(DRV_CFLAGS) $(DRV_WPA_CFLAGS) $(DRV_AP_CFLAGS)
 DRV_WPA_CFLAGS += $(DRV_CFLAGS)

src/drivers/netlink.c

@@ -0,0 +1,79 @@
+/*
+ * Netlink helper functions for driver wrappers
+ * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "priv_netlink.h"
+#include "netlink.h"
+
+
+int netlink_send_oper_ifla(int sock, int ifindex, int linkmode, int operstate)
+{
+	struct {
+		struct nlmsghdr hdr;
+		struct ifinfomsg ifinfo;
+		char opts[16];
+	} req;
+	struct rtattr *rta;
+	static int nl_seq;
+	ssize_t ret;
+
+	os_memset(&req, 0, sizeof(req));
+
+	req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
+	req.hdr.nlmsg_type = RTM_SETLINK;
+	req.hdr.nlmsg_flags = NLM_F_REQUEST;
+	req.hdr.nlmsg_seq = ++nl_seq;
+	req.hdr.nlmsg_pid = 0;
+
+	req.ifinfo.ifi_family = AF_UNSPEC;
+	req.ifinfo.ifi_type = 0;
+	req.ifinfo.ifi_index = ifindex;
+	req.ifinfo.ifi_flags = 0;
+	req.ifinfo.ifi_change = 0;
+
+	if (linkmode != -1) {
+		rta = aliasing_hide_typecast(
+			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
+			struct rtattr);
+		rta->rta_type = IFLA_LINKMODE;
+		rta->rta_len = RTA_LENGTH(sizeof(char));
+		*((char *) RTA_DATA(rta)) = linkmode;
+		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
+			RTA_LENGTH(sizeof(char));
+	}
+	if (operstate != -1) {
+		rta = aliasing_hide_typecast(
+			((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
+			struct rtattr);
+		rta->rta_type = IFLA_OPERSTATE;
+		rta->rta_len = RTA_LENGTH(sizeof(char));
+		*((char *) RTA_DATA(rta)) = operstate;
+		req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
+			RTA_LENGTH(sizeof(char));
+	}
+
+	wpa_printf(MSG_DEBUG, "netlink: Operstate: linkmode=%d, operstate=%d",
+		   linkmode, operstate);
+
+	ret = send(sock, &req, req.hdr.nlmsg_len, 0);
+	if (ret < 0) {
+		wpa_printf(MSG_DEBUG, "netlink: Sending operstate IFLA "
+			   "failed: %s (assume operstate is not supported)",
+			   strerror(errno));
+	}
+
+	return ret < 0 ? -1 : 0;
+}

src/drivers/netlink.h

@@ -0,0 +1,20 @@
+/*
+ * Netlink helper functions for driver wrappers
+ * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#ifndef NETLINK_H
+#define NETLINK_H
+
+int netlink_send_oper_ifla(int sock, int ifindex, int linkmode, int operstate);
+
+#endif /* NETLINK_H */