nl80211: Clean up netlink parsing and debug prints
This makes the RTM_NEWLINK, RTM_DELLINK, and operstate debug messages easier to understand. Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen
parent
b6a9590b34
commit
90a545ccba
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@ -1,6 +1,6 @@
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/*
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* Driver interaction with Linux nl80211/cfg80211
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* Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
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* Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
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* Copyright (c) 2003-2004, Instant802 Networks, Inc.
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* Copyright (c) 2005-2006, Devicescape Software, Inc.
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* Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
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@ -1049,49 +1049,55 @@ static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
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}
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static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
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char *buf, size_t len, int del)
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static void wpa_driver_nl80211_event_newlink(
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struct wpa_driver_nl80211_data *drv, char *ifname)
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{
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union wpa_event_data event;
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os_memset(&event, 0, sizeof(event));
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if (len > sizeof(event.interface_status.ifname))
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len = sizeof(event.interface_status.ifname) - 1;
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os_memcpy(event.interface_status.ifname, buf, len);
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event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
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EVENT_INTERFACE_ADDED;
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wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
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del ? "DEL" : "NEW",
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event.interface_status.ifname,
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del ? "removed" : "added");
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if (os_strcmp(drv->first_bss->ifname, event.interface_status.ifname) ==
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0) {
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if (del) {
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if (drv->if_removed) {
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wpa_printf(MSG_DEBUG, "nl80211: if_removed "
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"already set - ignore event");
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return;
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}
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drv->if_removed = 1;
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} else {
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if (if_nametoindex(drv->first_bss->ifname) == 0) {
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wpa_printf(MSG_DEBUG, "nl80211: Interface %s "
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"does not exist - ignore "
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"RTM_NEWLINK",
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drv->first_bss->ifname);
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return;
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}
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if (!drv->if_removed) {
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wpa_printf(MSG_DEBUG, "nl80211: if_removed "
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"already cleared - ignore event");
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return;
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}
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drv->if_removed = 0;
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if (os_strcmp(drv->first_bss->ifname, ifname) == 0) {
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if (if_nametoindex(drv->first_bss->ifname) == 0) {
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wpa_printf(MSG_DEBUG, "nl80211: Interface %s does not exist - ignore RTM_NEWLINK",
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drv->first_bss->ifname);
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return;
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}
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if (!drv->if_removed)
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return;
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wpa_printf(MSG_DEBUG, "nl80211: Mark if_removed=0 for %s based on RTM_NEWLINK event",
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drv->first_bss->ifname);
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drv->if_removed = 0;
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}
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os_memset(&event, 0, sizeof(event));
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os_strlcpy(event.interface_status.ifname, ifname,
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sizeof(event.interface_status.ifname));
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event.interface_status.ievent = EVENT_INTERFACE_ADDED;
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wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
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}
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static void wpa_driver_nl80211_event_dellink(
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struct wpa_driver_nl80211_data *drv, char *ifname)
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{
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union wpa_event_data event;
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if (os_strcmp(drv->first_bss->ifname, ifname) == 0) {
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if (drv->if_removed) {
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wpa_printf(MSG_DEBUG, "nl80211: if_removed already set - ignore RTM_DELLINK event for %s",
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ifname);
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return;
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}
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wpa_printf(MSG_DEBUG, "RTM_DELLINK: Interface '%s' removed - mark if_removed=1",
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ifname);
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drv->if_removed = 1;
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} else {
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wpa_printf(MSG_DEBUG, "RTM_DELLINK: Interface '%s' removed",
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ifname);
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}
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os_memset(&event, 0, sizeof(event));
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os_strlcpy(event.interface_status.ifname, ifname,
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sizeof(event.interface_status.ifname));
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event.interface_status.ievent = EVENT_INTERFACE_REMOVED;
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wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
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}
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@ -1158,21 +1164,57 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
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{
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struct nl80211_global *global = ctx;
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struct wpa_driver_nl80211_data *drv;
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int attrlen, rta_len;
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int attrlen;
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struct rtattr *attr;
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u32 brid = 0;
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char namebuf[IFNAMSIZ];
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char ifname[IFNAMSIZ + 1];
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char extra[100], *pos, *end;
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drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
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if (!drv) {
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wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
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"ifindex %d", ifi->ifi_index);
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wpa_printf(MSG_DEBUG, "nl80211: Ignore RTM_NEWLINK event for foreign ifindex %d",
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ifi->ifi_index);
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return;
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}
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wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
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"(%s%s%s%s)",
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drv->operstate, ifi->ifi_flags,
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extra[0] = '\0';
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pos = extra;
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end = pos + sizeof(extra);
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ifname[0] = '\0';
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attrlen = len;
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attr = (struct rtattr *) buf;
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while (RTA_OK(attr, attrlen)) {
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switch (attr->rta_type) {
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case IFLA_IFNAME:
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if (RTA_PAYLOAD(attr) >= IFNAMSIZ)
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break;
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os_memcpy(ifname, RTA_DATA(attr), RTA_PAYLOAD(attr));
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ifname[RTA_PAYLOAD(attr)] = '\0';
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break;
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case IFLA_MASTER:
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brid = nla_get_u32((struct nlattr *) attr);
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pos += os_snprintf(pos, end - pos, " master=%u", brid);
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break;
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case IFLA_WIRELESS:
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pos += os_snprintf(pos, end - pos, " wext");
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break;
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case IFLA_OPERSTATE:
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pos += os_snprintf(pos, end - pos, " operstate=%u",
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nla_get_u32((struct nlattr *) attr));
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break;
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case IFLA_LINKMODE:
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pos += os_snprintf(pos, end - pos, " linkmode=%u",
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nla_get_u32((struct nlattr *) attr));
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break;
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}
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attr = RTA_NEXT(attr, attrlen);
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}
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extra[sizeof(extra) - 1] = '\0';
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wpa_printf(MSG_DEBUG, "RTM_NEWLINK: ifi_index=%d ifname=%s%s ifi_flags=0x%x (%s%s%s%s)",
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ifi->ifi_index, ifname, extra, ifi->ifi_flags,
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(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
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(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
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(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
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@ -1229,24 +1271,15 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
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*/
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if (drv->operstate == 1 &&
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(ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
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!(ifi->ifi_flags & IFF_RUNNING))
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!(ifi->ifi_flags & IFF_RUNNING)) {
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wpa_printf(MSG_DEBUG, "nl80211: Set IF_OPER_UP again based on ifi_flags and expected operstate");
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netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
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-1, IF_OPER_UP);
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attrlen = len;
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attr = (struct rtattr *) buf;
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rta_len = RTA_ALIGN(sizeof(struct rtattr));
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while (RTA_OK(attr, attrlen)) {
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if (attr->rta_type == IFLA_IFNAME) {
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wpa_driver_nl80211_event_link(
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drv,
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((char *) attr) + rta_len,
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attr->rta_len - rta_len, 0);
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} else if (attr->rta_type == IFLA_MASTER)
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brid = nla_get_u32((struct nlattr *) attr);
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attr = RTA_NEXT(attr, attrlen);
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}
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if (ifname[0])
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wpa_driver_nl80211_event_newlink(drv, ifname);
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if (ifi->ifi_family == AF_BRIDGE && brid) {
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/* device has been added to bridge */
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if_indextoname(brid, namebuf);
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@ -1263,32 +1296,40 @@ static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
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{
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struct nl80211_global *global = ctx;
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struct wpa_driver_nl80211_data *drv;
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int attrlen, rta_len;
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int attrlen;
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struct rtattr *attr;
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u32 brid = 0;
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char ifname[IFNAMSIZ + 1];
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drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
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if (!drv) {
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wpa_printf(MSG_DEBUG, "nl80211: Ignore dellink event for "
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"foreign ifindex %d", ifi->ifi_index);
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wpa_printf(MSG_DEBUG, "nl80211: Ignore RTM_DELLINK event for foreign ifindex %d",
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ifi->ifi_index);
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return;
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}
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ifname[0] = '\0';
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attrlen = len;
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attr = (struct rtattr *) buf;
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rta_len = RTA_ALIGN(sizeof(struct rtattr));
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while (RTA_OK(attr, attrlen)) {
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if (attr->rta_type == IFLA_IFNAME) {
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wpa_driver_nl80211_event_link(
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drv,
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((char *) attr) + rta_len,
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attr->rta_len - rta_len, 1);
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} else if (attr->rta_type == IFLA_MASTER)
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switch (attr->rta_type) {
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case IFLA_IFNAME:
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if (RTA_PAYLOAD(attr) >= IFNAMSIZ)
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break;
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os_memcpy(ifname, RTA_DATA(attr), RTA_PAYLOAD(attr));
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ifname[RTA_PAYLOAD(attr)] = '\0';
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break;
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case IFLA_MASTER:
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brid = nla_get_u32((struct nlattr *) attr);
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break;
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}
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attr = RTA_NEXT(attr, attrlen);
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}
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if (ifname[0])
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wpa_driver_nl80211_event_dellink(drv, ifname);
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if (ifi->ifi_family == AF_BRIDGE && brid) {
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/* device has been removed from bridge */
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char namebuf[IFNAMSIZ];
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@ -8611,8 +8652,9 @@ static int wpa_driver_nl80211_set_operstate(void *priv, int state)
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struct i802_bss *bss = priv;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
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__func__, drv->operstate, state, state ? "UP" : "DORMANT");
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wpa_printf(MSG_DEBUG, "nl80211: Set %s operstate %d->%d (%s)",
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bss->ifname, drv->operstate, state,
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state ? "UP" : "DORMANT");
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drv->operstate = state;
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return netlink_send_oper_ifla(drv->global->netlink, drv->ifindex, -1,
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state ? IF_OPER_UP : IF_OPER_DORMANT);
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@ -1,6 +1,6 @@
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/*
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* Netlink helper functions for driver wrappers
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* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
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* Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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@ -137,6 +137,35 @@ void netlink_deinit(struct netlink_data *netlink)
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os_free(netlink);
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}
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static const char * linkmode_str(int mode)
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{
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switch (mode) {
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case -1:
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return "no change";
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case 0:
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return "kernel-control";
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case 1:
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return "userspace-control";
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}
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return "?";
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}
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static const char * operstate_str(int state)
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{
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switch (state) {
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case -1:
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return "no change";
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case IF_OPER_DORMANT:
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return "IF_OPER_DORMANT";
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case IF_OPER_UP:
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return "IF_OPER_UP";
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}
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return "?";
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}
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int netlink_send_oper_ifla(struct netlink_data *netlink, int ifindex,
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int linkmode, int operstate)
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{
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@ -184,8 +213,9 @@ int netlink_send_oper_ifla(struct netlink_data *netlink, int ifindex,
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RTA_LENGTH(sizeof(char));
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}
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wpa_printf(MSG_DEBUG, "netlink: Operstate: linkmode=%d, operstate=%d",
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linkmode, operstate);
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wpa_printf(MSG_DEBUG, "netlink: Operstate: ifindex=%d linkmode=%d (%s), operstate=%d (%s)",
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ifindex, linkmode, linkmode_str(linkmode),
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operstate, operstate_str(operstate));
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ret = send(netlink->sock, &req, req.hdr.nlmsg_len, 0);
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if (ret < 0) {
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@ -69,6 +69,7 @@
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(struct rtattr *) (((char *)(rta)) + RTA_ALIGN((rta)->rta_len)))
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#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
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#define RTA_DATA(rta) ((void *) (((char *) (rta)) + RTA_LENGTH(0)))
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#define RTA_PAYLOAD(rta) ((int) ((rta)->rta_len) - RTA_LENGTH(0))
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struct sockaddr_nl
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