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https://github.com/vanhoefm/fragattacks.git
synced 2024-11-25 08:48:31 -05:00
VLAN: Factor out per-vid code in newlink/dellink
To prepare for adding tagged VLAN support in vlan_init.c, vlan_newlink() and vlan_dellink() are split into multiple functions. This reduces indention and eases adding tagged VLANs as well. Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
This commit is contained in:
Michael Braun
Jouni Malinen
parent
8e44c192da
commit
f9c00188ca
@ -623,155 +623,182 @@ static int vlan_set_name_type(unsigned int name_type)
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#endif /* CONFIG_VLAN_NETLINK */
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static void vlan_newlink(char *ifname, struct hostapd_data *hapd)
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static void vlan_newlink_tagged(int vlan_naming, const char *tagged_interface,
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const char *br_name, int vid,
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struct hostapd_data *hapd)
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{
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char vlan_ifname[IFNAMSIZ];
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char br_name[IFNAMSIZ];
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struct hostapd_vlan *vlan = hapd->conf->vlan;
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int clean;
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if (vlan_naming == DYNAMIC_VLAN_NAMING_WITH_DEVICE)
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os_snprintf(vlan_ifname, sizeof(vlan_ifname), "%s.%d",
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tagged_interface, vid);
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else
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os_snprintf(vlan_ifname, sizeof(vlan_ifname), "vlan%d", vid);
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clean = 0;
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ifconfig_up(tagged_interface);
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if (!vlan_add(tagged_interface, vid, vlan_ifname))
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clean |= DVLAN_CLEAN_VLAN;
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if (!br_addif(br_name, vlan_ifname))
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clean |= DVLAN_CLEAN_VLAN_PORT;
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dyn_iface_get(hapd, vlan_ifname, clean);
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ifconfig_up(vlan_ifname);
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}
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static void vlan_bridge_name(char *br_name, struct hostapd_data *hapd, int vid)
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{
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char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
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int vlan_naming = hapd->conf->ssid.vlan_naming;
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int clean, untagged;
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wpa_printf(MSG_DEBUG, "VLAN: vlan_newlink(%s)", ifname);
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while (vlan) {
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untagged = vlan->vlan_desc.untagged;
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if (os_strcmp(ifname, vlan->ifname) == 0 && !vlan->configured) {
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vlan->configured = 1;
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if (hapd->conf->vlan_bridge[0]) {
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os_snprintf(br_name, sizeof(br_name), "%s%d",
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hapd->conf->vlan_bridge,
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untagged);
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} else if (tagged_interface) {
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os_snprintf(br_name, sizeof(br_name),
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"br%s.%d", tagged_interface,
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untagged);
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} else {
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os_snprintf(br_name, sizeof(br_name),
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"brvlan%d", untagged);
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}
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dyn_iface_get(hapd, br_name,
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br_addbr(br_name) ? 0 : DVLAN_CLEAN_BR);
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ifconfig_up(br_name);
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if (tagged_interface) {
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if (vlan_naming ==
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DYNAMIC_VLAN_NAMING_WITH_DEVICE)
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os_snprintf(vlan_ifname,
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sizeof(vlan_ifname),
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"%s.%d", tagged_interface,
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untagged);
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else
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os_snprintf(vlan_ifname,
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sizeof(vlan_ifname),
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"vlan%d", untagged);
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clean = 0;
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ifconfig_up(tagged_interface);
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if (!vlan_add(tagged_interface, untagged,
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vlan_ifname))
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clean |= DVLAN_CLEAN_VLAN;
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if (!br_addif(br_name, vlan_ifname))
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clean |= DVLAN_CLEAN_VLAN_PORT;
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dyn_iface_get(hapd, vlan_ifname, clean);
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ifconfig_up(vlan_ifname);
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}
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if (!br_addif(br_name, ifname))
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vlan->clean |= DVLAN_CLEAN_WLAN_PORT;
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ifconfig_up(ifname);
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break;
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}
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vlan = vlan->next;
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if (hapd->conf->vlan_bridge[0]) {
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os_snprintf(br_name, IFNAMSIZ, "%s%d",
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hapd->conf->vlan_bridge, vid);
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} else if (tagged_interface) {
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os_snprintf(br_name, IFNAMSIZ, "br%s.%d",
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tagged_interface, vid);
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} else {
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os_snprintf(br_name, IFNAMSIZ, "brvlan%d", vid);
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}
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}
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static void vlan_dellink(char *ifname, struct hostapd_data *hapd)
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static void vlan_get_bridge(const char *br_name, struct hostapd_data *hapd,
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int vid)
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{
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char vlan_ifname[IFNAMSIZ];
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char br_name[IFNAMSIZ];
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struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan;
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char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
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int vlan_naming = hapd->conf->ssid.vlan_naming;
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int clean, untagged;
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dyn_iface_get(hapd, br_name, br_addbr(br_name) ? 0 : DVLAN_CLEAN_BR);
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ifconfig_up(br_name);
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if (tagged_interface)
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vlan_newlink_tagged(vlan_naming, tagged_interface, br_name,
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vid, hapd);
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}
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static void vlan_newlink(const char *ifname, struct hostapd_data *hapd)
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{
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char br_name[IFNAMSIZ];
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struct hostapd_vlan *vlan;
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int untagged;
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wpa_printf(MSG_DEBUG, "VLAN: vlan_newlink(%s)", ifname);
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for (vlan = hapd->conf->vlan; vlan; vlan = vlan->next) {
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if (vlan->configured ||
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os_strcmp(ifname, vlan->ifname) != 0)
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continue;
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break;
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}
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if (!vlan)
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return;
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vlan->configured = 1;
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untagged = vlan->vlan_desc.untagged;
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if (untagged > 0 && untagged <= MAX_VLAN_ID) {
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vlan_bridge_name(br_name, hapd, untagged);
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vlan_get_bridge(br_name, hapd, untagged);
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if (!br_addif(br_name, ifname))
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vlan->clean |= DVLAN_CLEAN_WLAN_PORT;
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}
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ifconfig_up(ifname);
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}
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static void vlan_dellink_tagged(int vlan_naming, const char *tagged_interface,
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const char *br_name, int vid,
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struct hostapd_data *hapd)
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{
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char vlan_ifname[IFNAMSIZ];
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int clean;
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if (vlan_naming == DYNAMIC_VLAN_NAMING_WITH_DEVICE)
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os_snprintf(vlan_ifname, sizeof(vlan_ifname), "%s.%d",
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tagged_interface, vid);
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else
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os_snprintf(vlan_ifname, sizeof(vlan_ifname), "vlan%d", vid);
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clean = dyn_iface_put(hapd, vlan_ifname);
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if (clean & DVLAN_CLEAN_VLAN_PORT)
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br_delif(br_name, vlan_ifname);
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if (clean & DVLAN_CLEAN_VLAN) {
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ifconfig_down(vlan_ifname);
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vlan_rem(vlan_ifname);
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}
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}
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static void vlan_put_bridge(const char *br_name, struct hostapd_data *hapd,
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int vid)
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{
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int clean;
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char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
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int vlan_naming = hapd->conf->ssid.vlan_naming;
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if (tagged_interface)
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vlan_dellink_tagged(vlan_naming, tagged_interface, br_name,
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vid, hapd);
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clean = dyn_iface_put(hapd, br_name);
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if ((clean & DVLAN_CLEAN_BR) && br_getnumports(br_name) == 0) {
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ifconfig_down(br_name);
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br_delbr(br_name);
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}
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}
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static void vlan_dellink(const char *ifname, struct hostapd_data *hapd)
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{
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struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan;
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wpa_printf(MSG_DEBUG, "VLAN: vlan_dellink(%s)", ifname);
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first = prev = vlan;
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while (vlan) {
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untagged = vlan->vlan_desc.untagged;
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if (os_strcmp(ifname, vlan->ifname) == 0 &&
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vlan->configured) {
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if (hapd->conf->vlan_bridge[0]) {
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os_snprintf(br_name, sizeof(br_name), "%s%d",
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hapd->conf->vlan_bridge,
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untagged);
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} else if (tagged_interface) {
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os_snprintf(br_name, sizeof(br_name),
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"br%s.%d", tagged_interface,
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untagged);
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} else {
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os_snprintf(br_name, sizeof(br_name),
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"brvlan%d", untagged);
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}
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if (os_strcmp(ifname, vlan->ifname) != 0) {
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prev = vlan;
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vlan = vlan->next;
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continue;
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}
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break;
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}
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if (!vlan)
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return;
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if (vlan->configured) {
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int untagged = vlan->vlan_desc.untagged;
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char br_name[IFNAMSIZ];
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if (untagged > 0 && untagged <= MAX_VLAN_ID) {
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vlan_bridge_name(br_name, hapd, untagged);
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if (vlan->clean & DVLAN_CLEAN_WLAN_PORT)
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br_delif(br_name, vlan->ifname);
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if (tagged_interface) {
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if (vlan_naming ==
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DYNAMIC_VLAN_NAMING_WITH_DEVICE)
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os_snprintf(vlan_ifname,
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sizeof(vlan_ifname),
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"%s.%d", tagged_interface,
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untagged);
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else
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os_snprintf(vlan_ifname,
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sizeof(vlan_ifname),
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"vlan%d", untagged);
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clean = dyn_iface_put(hapd, vlan_ifname);
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if (clean & DVLAN_CLEAN_VLAN_PORT)
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br_delif(br_name, vlan_ifname);
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if (clean & DVLAN_CLEAN_VLAN) {
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ifconfig_down(vlan_ifname);
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vlan_rem(vlan_ifname);
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}
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}
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clean = dyn_iface_put(hapd, br_name);
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if ((clean & DVLAN_CLEAN_BR) &&
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br_getnumports(br_name) == 0) {
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ifconfig_down(br_name);
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br_delbr(br_name);
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}
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vlan_put_bridge(br_name, hapd, untagged);
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}
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if (os_strcmp(ifname, vlan->ifname) == 0) {
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if (vlan == first) {
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hapd->conf->vlan = vlan->next;
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} else {
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prev->next = vlan->next;
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}
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os_free(vlan);
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break;
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}
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prev = vlan;
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vlan = vlan->next;
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}
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if (vlan == first)
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hapd->conf->vlan = vlan->next;
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else
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prev->next = vlan->next;
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os_free(vlan);
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}
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