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authorJouni Malinen <j@w1.fi>2016-03-25 15:21:41 (GMT)
committerJouni Malinen <j@w1.fi>2016-03-25 15:24:20 (GMT)
commit84d6755108677f8ca542f49a3c0ca0c45deac40b (patch)
treec842c31ff01a0c221c17f98d32ba41940fade6b7 /src/ap/vlan_ioctl.c
parentcb38bc886e66d7ef20728fa6516aa28384a5febe (diff)
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vlan: Clean up netlink vs. ioctl API implementation
Move the ioctl-based VLAN implementation to a separate file to avoid need for conditional blocks within vlan_ioctl.c. This removes the internal CONFIG_VLAN_NETLINK define, i.e., this is now used only in build configuration (.config) to select whether to include the vlan_util.c (netlink) or vlan_ioctl.c (ioctl) implementation of the functions. Signed-off-by: Jouni Malinen <j@w1.fi>
Diffstat (limited to 'src/ap/vlan_ioctl.c')
-rw-r--r--src/ap/vlan_ioctl.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/src/ap/vlan_ioctl.c b/src/ap/vlan_ioctl.c
new file mode 100644
index 0000000..97b9224
--- /dev/null
+++ b/src/ap/vlan_ioctl.c
@@ -0,0 +1,163 @@
+/*
+ * hostapd / VLAN ioctl API
+ * Copyright 2003, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
+#include <linux/if_vlan.h>
+
+#include "utils/common.h"
+#include "vlan_util.h"
+
+/*
+ * These are only available in recent linux headers (without the leading
+ * underscore).
+ */
+#define _GET_VLAN_REALDEV_NAME_CMD 8
+#define _GET_VLAN_VID_CMD 9
+
+
+int vlan_rem(const char *if_name)
+{
+ int fd;
+ struct vlan_ioctl_args if_request;
+
+ wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(%s)", if_name);
+ if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
+ wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
+ if_name);
+ return -1;
+ }
+
+ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
+ "failed: %s", __func__, strerror(errno));
+ return -1;
+ }
+
+ os_memset(&if_request, 0, sizeof(if_request));
+
+ os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
+ if_request.cmd = DEL_VLAN_CMD;
+
+ if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
+ wpa_printf(MSG_ERROR, "VLAN: %s: DEL_VLAN_CMD failed for %s: "
+ "%s", __func__, if_name, strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return 0;
+}
+
+
+/*
+ Add a vlan interface with VLAN ID 'vid' and tagged interface
+ 'if_name'.
+
+ returns -1 on error
+ returns 1 if the interface already exists
+ returns 0 otherwise
+*/
+int vlan_add(const char *if_name, int vid, const char *vlan_if_name)
+{
+ int fd;
+ struct vlan_ioctl_args if_request;
+
+ wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d)",
+ if_name, vid);
+ ifconfig_up(if_name);
+
+ if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
+ wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'",
+ if_name);
+ return -1;
+ }
+
+ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
+ "failed: %s", __func__, strerror(errno));
+ return -1;
+ }
+
+ os_memset(&if_request, 0, sizeof(if_request));
+
+ /* Determine if a suitable vlan device already exists. */
+
+ os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d",
+ vid);
+
+ if_request.cmd = _GET_VLAN_VID_CMD;
+
+ if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
+ if_request.u.VID == vid) {
+ if_request.cmd = _GET_VLAN_REALDEV_NAME_CMD;
+
+ if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
+ os_strncmp(if_request.u.device2, if_name,
+ sizeof(if_request.u.device2)) == 0) {
+ close(fd);
+ wpa_printf(MSG_DEBUG,
+ "VLAN: vlan_add: if_name %s exists already",
+ if_request.device1);
+ return 1;
+ }
+ }
+
+ /* A suitable vlan device does not already exist, add one. */
+
+ os_memset(&if_request, 0, sizeof(if_request));
+ os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
+ if_request.u.VID = vid;
+ if_request.cmd = ADD_VLAN_CMD;
+
+ if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
+ wpa_printf(MSG_ERROR,
+ "VLAN: %s: ADD_VLAN_CMD failed for %s: %s",
+ __func__, if_request.device1, strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return 0;
+}
+
+
+int vlan_set_name_type(unsigned int name_type)
+{
+ int fd;
+ struct vlan_ioctl_args if_request;
+
+ wpa_printf(MSG_DEBUG, "VLAN: vlan_set_name_type(name_type=%u)",
+ name_type);
+ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+ wpa_printf(MSG_ERROR,
+ "VLAN: %s: socket(AF_INET,SOCK_STREAM) failed: %s",
+ __func__, strerror(errno));
+ return -1;
+ }
+
+ os_memset(&if_request, 0, sizeof(if_request));
+
+ if_request.u.name_type = name_type;
+ if_request.cmd = SET_VLAN_NAME_TYPE_CMD;
+ if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
+ wpa_printf(MSG_ERROR,
+ "VLAN: %s: SET_VLAN_NAME_TYPE_CMD name_type=%u failed: %s",
+ __func__, name_type, strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return 0;
+}