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From 0abc8d10cc357d71fff74470c613442f9070ae93 Mon Sep 17 00:00:00 2001
Message-Id: <0abc8d10cc357d71fff74470c613442f9070ae93.1488376602.git.dcaratti@redhat.com>
From: Sabrina Dubroca <sd@queasysnail.net>
Date: Sun, 27 Nov 2016 20:08:44 +0100
Subject: [PATCH] drivers: Move common definitions for wired drivers out

Refactor the common parts of wired drivers code into a shared file, so
that they can be reused by other drivers. The macsec_qca driver already
contains a lot of code duplication from the wired driver, and the
macsec_linux driver would do the same. A structure to hold data common
to all wired drivers is added and used in all these drivers.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
---
 src/drivers/driver_macsec_qca.c   | 65 ++++++++++++-------------
 src/drivers/driver_wired.c        | 99 +++++++++++++++++++--------------------
 src/drivers/driver_wired_common.h | 25 ++++++++++
 3 files changed, 103 insertions(+), 86 deletions(-)
 create mode 100644 src/drivers/driver_wired_common.h

diff --git a/src/drivers/driver_macsec_qca.c b/src/drivers/driver_macsec_qca.c
index 22d414c..6391e08 100644
--- a/src/drivers/driver_macsec_qca.c
+++ b/src/drivers/driver_macsec_qca.c
@@ -31,6 +31,7 @@
 #include "common/ieee802_1x_defs.h"
 #include "pae/ieee802_1x_kay.h"
 #include "driver.h"
+#include "driver_wired_common.h"
 
 #include "nss_macsec_secy.h"
 #include "nss_macsec_secy_rx.h"
@@ -53,21 +54,14 @@
 #pragma pack(pop)
 #endif /* _MSC_VER */
 
-static const u8 pae_group_addr[ETH_ALEN] =
-{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
-
 struct channel_map {
 	struct ieee802_1x_mka_sci sci;
 };
 
 struct macsec_qca_data {
-	char ifname[IFNAMSIZ + 1];
-	u32 secy_id;
-	void *ctx;
+	struct driver_wired_common_data common;
 
-	int sock; /* raw packet socket for driver access */
-	int pf_sock;
-	int membership, multi, iff_allmulti, iff_up;
+	u32 secy_id;
 
 	/* shadow */
 	Boolean always_include_sci;
@@ -322,43 +316,43 @@ static void * macsec_qca_init(void *ctx, const char *ifname)
 	drv = os_zalloc(sizeof(*drv));
 	if (drv == NULL)
 		return NULL;
-	os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
-	drv->ctx = ctx;
+	os_strlcpy(drv->common.ifname, ifname, sizeof(drv->common.ifname));
+	drv->common.ctx = ctx;
 
 	/* Board specific settings */
-	if (os_memcmp("eth2", drv->ifname, 4) == 0)
+	if (os_memcmp("eth2", drv->common.ifname, 4) == 0)
 		drv->secy_id = 1;
-	else if (os_memcmp("eth3", drv->ifname, 4) == 0)
+	else if (os_memcmp("eth3", drv->common.ifname, 4) == 0)
 		drv->secy_id = 2;
 	else
 		drv->secy_id = -1;
 
 #ifdef __linux__
-	drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
-	if (drv->pf_sock < 0)
+	drv->common.pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
+	if (drv->common.pf_sock < 0)
 		wpa_printf(MSG_ERROR, "socket(PF_PACKET): %s", strerror(errno));
 #else /* __linux__ */
-	drv->pf_sock = -1;
+	drv->common.pf_sock = -1;
 #endif /* __linux__ */
 
 	if (macsec_qca_get_ifflags(ifname, &flags) == 0 &&
 	    !(flags & IFF_UP) &&
 	    macsec_qca_set_ifflags(ifname, flags | IFF_UP) == 0) {
-		drv->iff_up = 1;
+		drv->common.iff_up = 1;
 	}
 
-	if (macsec_qca_multicast_membership(drv->pf_sock,
-					    if_nametoindex(drv->ifname),
+	if (macsec_qca_multicast_membership(drv->common.pf_sock,
+					    if_nametoindex(drv->common.ifname),
 					    pae_group_addr, 1) == 0) {
 		wpa_printf(MSG_DEBUG,
 			   "%s: Added multicast membership with packet socket",
 			   __func__);
-		drv->membership = 1;
+		drv->common.membership = 1;
 	} else if (macsec_qca_multi(ifname, pae_group_addr, 1) == 0) {
 		wpa_printf(MSG_DEBUG,
 			   "%s: Added multicast membership with SIOCADDMULTI",
 			   __func__);
-		drv->multi = 1;
+		drv->common.multi = 1;
 	} else if (macsec_qca_get_ifflags(ifname, &flags) < 0) {
 		wpa_printf(MSG_INFO, "%s: Could not get interface flags",
 			   __func__);
@@ -375,7 +369,7 @@ static void * macsec_qca_init(void *ctx, const char *ifname)
 		return NULL;
 	} else {
 		wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode", __func__);
-		drv->iff_allmulti = 1;
+		drv->common.iff_allmulti = 1;
 	}
 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
 	{
@@ -397,39 +391,40 @@ static void macsec_qca_deinit(void *priv)
 	struct macsec_qca_data *drv = priv;
 	int flags;
 
-	if (drv->membership &&
-	    macsec_qca_multicast_membership(drv->pf_sock,
-					    if_nametoindex(drv->ifname),
+	if (drv->common.membership &&
+	    macsec_qca_multicast_membership(drv->common.pf_sock,
+					    if_nametoindex(drv->common.ifname),
 					    pae_group_addr, 0) < 0) {
 		wpa_printf(MSG_DEBUG,
 			   "%s: Failed to remove PAE multicast group (PACKET)",
 			   __func__);
 	}
 
-	if (drv->multi &&
-	    macsec_qca_multi(drv->ifname, pae_group_addr, 0) < 0) {
+	if (drv->common.multi &&
+	    macsec_qca_multi(drv->common.ifname, pae_group_addr, 0) < 0) {
 		wpa_printf(MSG_DEBUG,
 			   "%s: Failed to remove PAE multicast group (SIOCDELMULTI)",
 			   __func__);
 	}
 
-	if (drv->iff_allmulti &&
-	    (macsec_qca_get_ifflags(drv->ifname, &flags) < 0 ||
-	     macsec_qca_set_ifflags(drv->ifname, flags & ~IFF_ALLMULTI) < 0)) {
+	if (drv->common.iff_allmulti &&
+	    (macsec_qca_get_ifflags(drv->common.ifname, &flags) < 0 ||
+	     macsec_qca_set_ifflags(drv->common.ifname,
+				    flags & ~IFF_ALLMULTI) < 0)) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
 			   __func__);
 	}
 
-	if (drv->iff_up &&
-	    macsec_qca_get_ifflags(drv->ifname, &flags) == 0 &&
+	if (drv->common.iff_up &&
+	    macsec_qca_get_ifflags(drv->common.ifname, &flags) == 0 &&
 	    (flags & IFF_UP) &&
-	    macsec_qca_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
+	    macsec_qca_set_ifflags(drv->common.ifname, flags & ~IFF_UP) < 0) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
 			   __func__);
 	}
 
-	if (drv->pf_sock != -1)
-		close(drv->pf_sock);
+	if (drv->common.pf_sock != -1)
+		close(drv->common.pf_sock);
 
 	os_free(drv);
 }
diff --git a/src/drivers/driver_wired.c b/src/drivers/driver_wired.c
index 422a220..b6f79e3 100644
--- a/src/drivers/driver_wired.c
+++ b/src/drivers/driver_wired.c
@@ -12,6 +12,7 @@
 #include "common.h"
 #include "eloop.h"
 #include "driver.h"
+#include "driver_wired_common.h"
 
 #include <sys/ioctl.h>
 #undef IFNAMSIZ
@@ -42,20 +43,12 @@ struct ieee8023_hdr {
 #pragma pack(pop)
 #endif /* _MSC_VER */
 
-static const u8 pae_group_addr[ETH_ALEN] =
-{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
-
 
 struct wpa_driver_wired_data {
-	char ifname[IFNAMSIZ + 1];
-	void *ctx;
+	struct driver_wired_common_data common;
 
-	int sock; /* raw packet socket for driver access */
 	int dhcp_sock; /* socket for dhcp packets */
 	int use_pae_group_addr;
-
-	int pf_sock;
-	int membership, multi, iff_allmulti, iff_up;
 };
 
 
@@ -208,21 +201,22 @@ static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
 	struct sockaddr_in addr2;
 	int n = 1;
 
-	drv->sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
-	if (drv->sock < 0) {
+	drv->common.sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE));
+	if (drv->common.sock < 0) {
 		wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s",
 			   strerror(errno));
 		return -1;
 	}
 
-	if (eloop_register_read_sock(drv->sock, handle_read, drv->ctx, NULL)) {
+	if (eloop_register_read_sock(drv->common.sock, handle_read,
+				     drv->common.ctx, NULL)) {
 		wpa_printf(MSG_INFO, "Could not register read socket");
 		return -1;
 	}
 
 	os_memset(&ifr, 0, sizeof(ifr));
-	os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
-	if (ioctl(drv->sock, SIOCGIFINDEX, &ifr) != 0) {
+	os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name));
+	if (ioctl(drv->common.sock, SIOCGIFINDEX, &ifr) != 0) {
 		wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s",
 			   strerror(errno));
 		return -1;
@@ -234,13 +228,14 @@ static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
 	wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
 		   addr.sll_ifindex);
 
-	if (bind(drv->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+	if (bind(drv->common.sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
+	{
 		wpa_printf(MSG_ERROR, "bind: %s", strerror(errno));
 		return -1;
 	}
 
 	/* filter multicast address */
-	if (wired_multicast_membership(drv->sock, ifr.ifr_ifindex,
+	if (wired_multicast_membership(drv->common.sock, ifr.ifr_ifindex,
 				       pae_group_addr, 1) < 0) {
 		wpa_printf(MSG_ERROR, "wired: Failed to add multicast group "
 			   "membership");
@@ -248,8 +243,8 @@ static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
 	}
 
 	os_memset(&ifr, 0, sizeof(ifr));
-	os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
-	if (ioctl(drv->sock, SIOCGIFHWADDR, &ifr) != 0) {
+	os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name));
+	if (ioctl(drv->common.sock, SIOCGIFHWADDR, &ifr) != 0) {
 		wpa_printf(MSG_ERROR, "ioctl(SIOCGIFHWADDR): %s",
 			   strerror(errno));
 		return -1;
@@ -269,8 +264,8 @@ static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
 		return -1;
 	}
 
-	if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp, drv->ctx,
-				     NULL)) {
+	if (eloop_register_read_sock(drv->dhcp_sock, handle_dhcp,
+				     drv->common.ctx, NULL)) {
 		wpa_printf(MSG_INFO, "Could not register read socket");
 		return -1;
 	}
@@ -294,7 +289,7 @@ static int wired_init_sockets(struct wpa_driver_wired_data *drv, u8 *own_addr)
 	}
 
 	os_memset(&ifr, 0, sizeof(ifr));
-	os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->ifname, IFNAMSIZ);
+	os_strlcpy(ifr.ifr_ifrn.ifrn_name, drv->common.ifname, IFNAMSIZ);
 	if (setsockopt(drv->dhcp_sock, SOL_SOCKET, SO_BINDTODEVICE,
 		       (char *) &ifr, sizeof(ifr)) < 0) {
 		wpa_printf(MSG_ERROR,
@@ -343,7 +338,7 @@ static int wired_send_eapol(void *priv, const u8 *addr,
 	pos = (u8 *) (hdr + 1);
 	os_memcpy(pos, data, data_len);
 
-	res = send(drv->sock, (u8 *) hdr, len, 0);
+	res = send(drv->common.sock, (u8 *) hdr, len, 0);
 	os_free(hdr);
 
 	if (res < 0) {
@@ -368,8 +363,9 @@ static void * wired_driver_hapd_init(struct hostapd_data *hapd,
 		return NULL;
 	}
 
-	drv->ctx = hapd;
-	os_strlcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
+	drv->common.ctx = hapd;
+	os_strlcpy(drv->common.ifname, params->ifname,
+		   sizeof(drv->common.ifname));
 	drv->use_pae_group_addr = params->use_pae_group_addr;
 
 	if (wired_init_sockets(drv, params->own_addr)) {
@@ -385,9 +381,9 @@ static void wired_driver_hapd_deinit(void *priv)
 {
 	struct wpa_driver_wired_data *drv = priv;
 
-	if (drv->sock >= 0) {
-		eloop_unregister_read_sock(drv->sock);
-		close(drv->sock);
+	if (drv->common.sock >= 0) {
+		eloop_unregister_read_sock(drv->common.sock);
+		close(drv->common.sock);
 	}
 
 	if (drv->dhcp_sock >= 0) {
@@ -564,33 +560,33 @@ static void * wpa_driver_wired_init(void *ctx, const char *ifname)
 	drv = os_zalloc(sizeof(*drv));
 	if (drv == NULL)
 		return NULL;
-	os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
-	drv->ctx = ctx;
+	os_strlcpy(drv->common.ifname, ifname, sizeof(drv->common.ifname));
+	drv->common.ctx = ctx;
 
 #ifdef __linux__
-	drv->pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
-	if (drv->pf_sock < 0)
+	drv->common.pf_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
+	if (drv->common.pf_sock < 0)
 		wpa_printf(MSG_ERROR, "socket(PF_PACKET): %s", strerror(errno));
 #else /* __linux__ */
-	drv->pf_sock = -1;
+	drv->common.pf_sock = -1;
 #endif /* __linux__ */
 
 	if (wpa_driver_wired_get_ifflags(ifname, &flags) == 0 &&
 	    !(flags & IFF_UP) &&
 	    wpa_driver_wired_set_ifflags(ifname, flags | IFF_UP) == 0) {
-		drv->iff_up = 1;
+		drv->common.iff_up = 1;
 	}
 
-	if (wired_multicast_membership(drv->pf_sock,
-				       if_nametoindex(drv->ifname),
+	if (wired_multicast_membership(drv->common.pf_sock,
+				       if_nametoindex(drv->common.ifname),
 				       pae_group_addr, 1) == 0) {
 		wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
 			   "packet socket", __func__);
-		drv->membership = 1;
+		drv->common.membership = 1;
 	} else if (wpa_driver_wired_multi(ifname, pae_group_addr, 1) == 0) {
 		wpa_printf(MSG_DEBUG, "%s: Added multicast membership with "
 			   "SIOCADDMULTI", __func__);
-		drv->multi = 1;
+		drv->common.multi = 1;
 	} else if (wpa_driver_wired_get_ifflags(ifname, &flags) < 0) {
 		wpa_printf(MSG_INFO, "%s: Could not get interface "
 			   "flags", __func__);
@@ -608,7 +604,7 @@ static void * wpa_driver_wired_init(void *ctx, const char *ifname)
 	} else {
 		wpa_printf(MSG_DEBUG, "%s: Enabled allmulti mode",
 			   __func__);
-		drv->iff_allmulti = 1;
+		drv->common.iff_allmulti = 1;
 	}
 #if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
 	{
@@ -630,38 +626,39 @@ static void wpa_driver_wired_deinit(void *priv)
 	struct wpa_driver_wired_data *drv = priv;
 	int flags;
 
-	if (drv->membership &&
-	    wired_multicast_membership(drv->pf_sock,
-				       if_nametoindex(drv->ifname),
+	if (drv->common.membership &&
+	    wired_multicast_membership(drv->common.pf_sock,
+				       if_nametoindex(drv->common.ifname),
 				       pae_group_addr, 0) < 0) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
 			   "group (PACKET)", __func__);
 	}
 
-	if (drv->multi &&
-	    wpa_driver_wired_multi(drv->ifname, pae_group_addr, 0) < 0) {
+	if (drv->common.multi &&
+	    wpa_driver_wired_multi(drv->common.ifname, pae_group_addr, 0) < 0) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to remove PAE multicast "
 			   "group (SIOCDELMULTI)", __func__);
 	}
 
-	if (drv->iff_allmulti &&
-	    (wpa_driver_wired_get_ifflags(drv->ifname, &flags) < 0 ||
-	     wpa_driver_wired_set_ifflags(drv->ifname,
+	if (drv->common.iff_allmulti &&
+	    (wpa_driver_wired_get_ifflags(drv->common.ifname, &flags) < 0 ||
+	     wpa_driver_wired_set_ifflags(drv->common.ifname,
 					  flags & ~IFF_ALLMULTI) < 0)) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to disable allmulti mode",
 			   __func__);
 	}
 
-	if (drv->iff_up &&
-	    wpa_driver_wired_get_ifflags(drv->ifname, &flags) == 0 &&
+	if (drv->common.iff_up &&
+	    wpa_driver_wired_get_ifflags(drv->common.ifname, &flags) == 0 &&
 	    (flags & IFF_UP) &&
-	    wpa_driver_wired_set_ifflags(drv->ifname, flags & ~IFF_UP) < 0) {
+	    wpa_driver_wired_set_ifflags(drv->common.ifname,
+					 flags & ~IFF_UP) < 0) {
 		wpa_printf(MSG_DEBUG, "%s: Failed to set the interface down",
 			   __func__);
 	}
 
-	if (drv->pf_sock != -1)
-		close(drv->pf_sock);
+	if (drv->common.pf_sock != -1)
+		close(drv->common.pf_sock);
 
 	os_free(drv);
 }
diff --git a/src/drivers/driver_wired_common.h b/src/drivers/driver_wired_common.h
new file mode 100644
index 0000000..8d9dd37
--- /dev/null
+++ b/src/drivers/driver_wired_common.h
@@ -0,0 +1,25 @@
+/*
+ * Common definitions for Wired Ethernet driver interfaces
+ * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004, Gunter Burchardt <tira@isx.de>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef DRIVER_WIRED_COMMON_H
+#define DRIVER_WIRED_COMMON_H
+
+struct driver_wired_common_data {
+	char ifname[IFNAMSIZ + 1];
+	void *ctx;
+
+	int sock; /* raw packet socket for driver access */
+	int pf_sock;
+	int membership, multi, iff_allmulti, iff_up;
+};
+
+static const u8 pae_group_addr[ETH_ALEN] =
+{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
+
+#endif /* DRIVER_WIRED_COMMON_H */
-- 
2.7.4