077a781f7a
hostapd_cli wps_pin command can now have an optional timeout parameter that sets the PIN lifetime in seconds. This can be used to reduce the likelihood of someone else using the PIN should an active PIN be left in the Registrar.
644 lines
15 KiB
C
644 lines
15 KiB
C
/*
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* hostapd / UNIX domain socket -based control interface
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* Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#ifndef CONFIG_NATIVE_WINDOWS
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <stddef.h>
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#include "hostapd.h"
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#include "eloop.h"
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#include "config.h"
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#include "ieee802_1x.h"
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#include "wpa.h"
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#include "radius/radius_client.h"
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#include "ieee802_11.h"
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#include "ctrl_iface.h"
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#include "sta_info.h"
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#include "accounting.h"
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#include "wps_hostapd.h"
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#include "drivers/driver.h"
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struct wpa_ctrl_dst {
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struct wpa_ctrl_dst *next;
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struct sockaddr_un addr;
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socklen_t addrlen;
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int debug_level;
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int errors;
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};
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static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
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const char *buf, size_t len);
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static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
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struct sockaddr_un *from,
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socklen_t fromlen)
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{
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struct wpa_ctrl_dst *dst;
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dst = os_zalloc(sizeof(*dst));
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if (dst == NULL)
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return -1;
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os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
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dst->addrlen = fromlen;
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dst->debug_level = MSG_INFO;
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dst->next = hapd->ctrl_dst;
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hapd->ctrl_dst = dst;
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wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
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(u8 *) from->sun_path,
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fromlen - offsetof(struct sockaddr_un, sun_path));
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return 0;
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}
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static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
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struct sockaddr_un *from,
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socklen_t fromlen)
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{
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struct wpa_ctrl_dst *dst, *prev = NULL;
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dst = hapd->ctrl_dst;
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while (dst) {
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if (fromlen == dst->addrlen &&
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os_memcmp(from->sun_path, dst->addr.sun_path,
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fromlen - offsetof(struct sockaddr_un, sun_path))
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== 0) {
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if (prev == NULL)
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hapd->ctrl_dst = dst->next;
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else
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prev->next = dst->next;
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os_free(dst);
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wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
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(u8 *) from->sun_path,
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fromlen -
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offsetof(struct sockaddr_un, sun_path));
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return 0;
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}
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prev = dst;
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dst = dst->next;
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}
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return -1;
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}
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static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
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struct sockaddr_un *from,
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socklen_t fromlen,
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char *level)
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{
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struct wpa_ctrl_dst *dst;
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wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
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dst = hapd->ctrl_dst;
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while (dst) {
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if (fromlen == dst->addrlen &&
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os_memcmp(from->sun_path, dst->addr.sun_path,
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fromlen - offsetof(struct sockaddr_un, sun_path))
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== 0) {
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wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
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"level", (u8 *) from->sun_path, fromlen -
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offsetof(struct sockaddr_un, sun_path));
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dst->debug_level = atoi(level);
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return 0;
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}
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dst = dst->next;
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}
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return -1;
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}
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static int hostapd_ctrl_iface_sta_mib(struct hostapd_data *hapd,
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struct sta_info *sta,
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char *buf, size_t buflen)
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{
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int len, res, ret;
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if (sta == NULL) {
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ret = os_snprintf(buf, buflen, "FAIL\n");
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if (ret < 0 || (size_t) ret >= buflen)
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return 0;
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return ret;
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}
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len = 0;
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ret = os_snprintf(buf + len, buflen - len, MACSTR "\n",
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MAC2STR(sta->addr));
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if (ret < 0 || (size_t) ret >= buflen - len)
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return len;
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len += ret;
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res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
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if (res >= 0)
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len += res;
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res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
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if (res >= 0)
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len += res;
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res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
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if (res >= 0)
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len += res;
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return len;
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}
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static int hostapd_ctrl_iface_sta_first(struct hostapd_data *hapd,
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char *buf, size_t buflen)
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{
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return hostapd_ctrl_iface_sta_mib(hapd, hapd->sta_list, buf, buflen);
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}
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static int hostapd_ctrl_iface_sta(struct hostapd_data *hapd,
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const char *txtaddr,
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char *buf, size_t buflen)
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{
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u8 addr[ETH_ALEN];
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int ret;
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if (hwaddr_aton(txtaddr, addr)) {
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ret = os_snprintf(buf, buflen, "FAIL\n");
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if (ret < 0 || (size_t) ret >= buflen)
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return 0;
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return ret;
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}
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return hostapd_ctrl_iface_sta_mib(hapd, ap_get_sta(hapd, addr),
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buf, buflen);
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}
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static int hostapd_ctrl_iface_sta_next(struct hostapd_data *hapd,
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const char *txtaddr,
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char *buf, size_t buflen)
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{
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u8 addr[ETH_ALEN];
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struct sta_info *sta;
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int ret;
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if (hwaddr_aton(txtaddr, addr) ||
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(sta = ap_get_sta(hapd, addr)) == NULL) {
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ret = os_snprintf(buf, buflen, "FAIL\n");
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if (ret < 0 || (size_t) ret >= buflen)
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return 0;
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return ret;
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}
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return hostapd_ctrl_iface_sta_mib(hapd, sta->next, buf, buflen);
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}
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static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
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const char *txtaddr)
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{
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u8 addr[ETH_ALEN];
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struct sta_info *sta;
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wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
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if (hwaddr_aton(txtaddr, addr))
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return -1;
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sta = ap_get_sta(hapd, addr);
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if (sta)
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return 0;
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wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
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"notification", MAC2STR(addr));
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sta = ap_sta_add(hapd, addr);
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if (sta == NULL)
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return -1;
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hostapd_new_assoc_sta(hapd, sta, 0);
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return 0;
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}
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#ifdef CONFIG_IEEE80211W
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#ifdef NEED_MLME
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static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
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const char *txtaddr)
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{
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u8 addr[ETH_ALEN];
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u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
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wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
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if (hwaddr_aton(txtaddr, addr))
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return -1;
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os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
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ieee802_11_send_sa_query_req(hapd, addr, trans_id);
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return 0;
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}
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#endif /* NEED_MLME */
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#endif /* CONFIG_IEEE80211W */
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#ifdef CONFIG_WPS
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static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
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{
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char *pin = os_strchr(txt, ' ');
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char *timeout_txt;
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int timeout;
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if (pin == NULL)
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return -1;
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*pin++ = '\0';
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timeout_txt = os_strchr(pin, ' ');
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if (timeout_txt) {
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*timeout_txt++ = '\0';
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timeout = atoi(timeout_txt);
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} else
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timeout = 0;
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return hostapd_wps_add_pin(hapd, txt, pin, timeout);
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}
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#ifdef CONFIG_WPS_OOB
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static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
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{
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char *path, *method, *name;
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path = os_strchr(txt, ' ');
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if (path == NULL)
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return -1;
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*path++ = '\0';
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method = os_strchr(path, ' ');
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if (method == NULL)
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return -1;
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*method++ = '\0';
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name = os_strchr(method, ' ');
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if (name != NULL)
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*name++ = '\0';
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return hostapd_wps_start_oob(hapd, txt, path, method, name);
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}
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#endif /* CONFIG_WPS_OOB */
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#endif /* CONFIG_WPS */
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static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
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void *sock_ctx)
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{
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struct hostapd_data *hapd = eloop_ctx;
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char buf[256];
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int res;
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struct sockaddr_un from;
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socklen_t fromlen = sizeof(from);
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char *reply;
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const int reply_size = 4096;
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int reply_len;
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res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
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(struct sockaddr *) &from, &fromlen);
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if (res < 0) {
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perror("recvfrom(ctrl_iface)");
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return;
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}
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buf[res] = '\0';
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wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
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reply = os_malloc(reply_size);
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if (reply == NULL) {
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sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
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fromlen);
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return;
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}
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os_memcpy(reply, "OK\n", 3);
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reply_len = 3;
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if (os_strcmp(buf, "PING") == 0) {
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os_memcpy(reply, "PONG\n", 5);
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reply_len = 5;
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} else if (os_strcmp(buf, "MIB") == 0) {
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reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
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if (reply_len >= 0) {
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res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
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reply_size - reply_len);
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if (res < 0)
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reply_len = -1;
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else
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reply_len += res;
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}
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if (reply_len >= 0) {
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res = ieee802_1x_get_mib(hapd, reply + reply_len,
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reply_size - reply_len);
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if (res < 0)
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reply_len = -1;
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else
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reply_len += res;
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}
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if (reply_len >= 0) {
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res = radius_client_get_mib(hapd->radius,
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reply + reply_len,
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reply_size - reply_len);
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if (res < 0)
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reply_len = -1;
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else
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reply_len += res;
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}
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} else if (os_strcmp(buf, "STA-FIRST") == 0) {
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reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
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reply_size);
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} else if (os_strncmp(buf, "STA ", 4) == 0) {
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reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
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reply_size);
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} else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
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reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
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reply_size);
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} else if (os_strcmp(buf, "ATTACH") == 0) {
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if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
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reply_len = -1;
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} else if (os_strcmp(buf, "DETACH") == 0) {
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if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
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reply_len = -1;
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} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
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if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
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buf + 6))
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reply_len = -1;
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} else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
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if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
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reply_len = -1;
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#ifdef CONFIG_IEEE80211W
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#ifdef NEED_MLME
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} else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
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if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
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reply_len = -1;
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#endif /* NEED_MLME */
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#endif /* CONFIG_IEEE80211W */
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#ifdef CONFIG_WPS
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} else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
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if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
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reply_len = -1;
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} else if (os_strcmp(buf, "WPS_PBC") == 0) {
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if (hostapd_wps_button_pushed(hapd))
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reply_len = -1;
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#ifdef CONFIG_WPS_OOB
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} else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
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if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
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reply_len = -1;
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#endif /* CONFIG_WPS_OOB */
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#endif /* CONFIG_WPS */
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} else {
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os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
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reply_len = 16;
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}
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if (reply_len < 0) {
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os_memcpy(reply, "FAIL\n", 5);
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reply_len = 5;
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}
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sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
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os_free(reply);
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}
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static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
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{
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char *buf;
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size_t len;
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if (hapd->conf->ctrl_interface == NULL)
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return NULL;
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len = os_strlen(hapd->conf->ctrl_interface) +
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os_strlen(hapd->conf->iface) + 2;
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buf = os_malloc(len);
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if (buf == NULL)
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return NULL;
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os_snprintf(buf, len, "%s/%s",
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hapd->conf->ctrl_interface, hapd->conf->iface);
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buf[len - 1] = '\0';
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return buf;
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}
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static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
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const char *txt, size_t len)
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{
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struct hostapd_data *hapd = ctx;
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if (hapd == NULL)
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return;
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hostapd_ctrl_iface_send(hapd, level, txt, len);
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}
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int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
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{
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struct sockaddr_un addr;
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int s = -1;
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char *fname = NULL;
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hapd->ctrl_sock = -1;
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if (hapd->conf->ctrl_interface == NULL)
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return 0;
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if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
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if (errno == EEXIST) {
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wpa_printf(MSG_DEBUG, "Using existing control "
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"interface directory.");
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} else {
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perror("mkdir[ctrl_interface]");
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goto fail;
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}
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}
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if (hapd->conf->ctrl_interface_gid_set &&
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chown(hapd->conf->ctrl_interface, 0,
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hapd->conf->ctrl_interface_gid) < 0) {
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perror("chown[ctrl_interface]");
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return -1;
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}
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if (os_strlen(hapd->conf->ctrl_interface) + 1 +
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os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
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goto fail;
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s = socket(PF_UNIX, SOCK_DGRAM, 0);
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if (s < 0) {
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perror("socket(PF_UNIX)");
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goto fail;
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}
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os_memset(&addr, 0, sizeof(addr));
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#ifdef __FreeBSD__
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addr.sun_len = sizeof(addr);
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#endif /* __FreeBSD__ */
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addr.sun_family = AF_UNIX;
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fname = hostapd_ctrl_iface_path(hapd);
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if (fname == NULL)
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goto fail;
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os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
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if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
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strerror(errno));
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if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
|
|
wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
|
|
" allow connections - assuming it was left"
|
|
"over from forced program termination");
|
|
if (unlink(fname) < 0) {
|
|
perror("unlink[ctrl_iface]");
|
|
wpa_printf(MSG_ERROR, "Could not unlink "
|
|
"existing ctrl_iface socket '%s'",
|
|
fname);
|
|
goto fail;
|
|
}
|
|
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
|
|
0) {
|
|
perror("bind(PF_UNIX)");
|
|
goto fail;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
|
|
"ctrl_iface socket '%s'", fname);
|
|
} else {
|
|
wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
|
|
"be in use - cannot override it");
|
|
wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
|
|
"not used anymore", fname);
|
|
os_free(fname);
|
|
fname = NULL;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (hapd->conf->ctrl_interface_gid_set &&
|
|
chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
|
|
perror("chown[ctrl_interface/ifname]");
|
|
goto fail;
|
|
}
|
|
|
|
if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
|
|
perror("chmod[ctrl_interface/ifname]");
|
|
goto fail;
|
|
}
|
|
os_free(fname);
|
|
|
|
hapd->ctrl_sock = s;
|
|
eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
|
|
NULL);
|
|
wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (s >= 0)
|
|
close(s);
|
|
if (fname) {
|
|
unlink(fname);
|
|
os_free(fname);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
|
|
{
|
|
struct wpa_ctrl_dst *dst, *prev;
|
|
|
|
if (hapd->ctrl_sock > -1) {
|
|
char *fname;
|
|
eloop_unregister_read_sock(hapd->ctrl_sock);
|
|
close(hapd->ctrl_sock);
|
|
hapd->ctrl_sock = -1;
|
|
fname = hostapd_ctrl_iface_path(hapd);
|
|
if (fname)
|
|
unlink(fname);
|
|
os_free(fname);
|
|
|
|
if (hapd->conf->ctrl_interface &&
|
|
rmdir(hapd->conf->ctrl_interface) < 0) {
|
|
if (errno == ENOTEMPTY) {
|
|
wpa_printf(MSG_DEBUG, "Control interface "
|
|
"directory not empty - leaving it "
|
|
"behind");
|
|
} else {
|
|
perror("rmdir[ctrl_interface]");
|
|
}
|
|
}
|
|
}
|
|
|
|
dst = hapd->ctrl_dst;
|
|
while (dst) {
|
|
prev = dst;
|
|
dst = dst->next;
|
|
os_free(prev);
|
|
}
|
|
}
|
|
|
|
|
|
static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct wpa_ctrl_dst *dst, *next;
|
|
struct msghdr msg;
|
|
int idx;
|
|
struct iovec io[2];
|
|
char levelstr[10];
|
|
|
|
dst = hapd->ctrl_dst;
|
|
if (hapd->ctrl_sock < 0 || dst == NULL)
|
|
return;
|
|
|
|
os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
|
|
io[0].iov_base = levelstr;
|
|
io[0].iov_len = os_strlen(levelstr);
|
|
io[1].iov_base = (char *) buf;
|
|
io[1].iov_len = len;
|
|
os_memset(&msg, 0, sizeof(msg));
|
|
msg.msg_iov = io;
|
|
msg.msg_iovlen = 2;
|
|
|
|
idx = 0;
|
|
while (dst) {
|
|
next = dst->next;
|
|
if (level >= dst->debug_level) {
|
|
wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
|
|
(u8 *) dst->addr.sun_path, dst->addrlen -
|
|
offsetof(struct sockaddr_un, sun_path));
|
|
msg.msg_name = &dst->addr;
|
|
msg.msg_namelen = dst->addrlen;
|
|
if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
|
|
int _errno = errno;
|
|
wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
|
|
"%d - %s",
|
|
idx, errno, strerror(errno));
|
|
dst->errors++;
|
|
if (dst->errors > 10 || _errno == ENOENT) {
|
|
hostapd_ctrl_iface_detach(
|
|
hapd, &dst->addr,
|
|
dst->addrlen);
|
|
}
|
|
} else
|
|
dst->errors = 0;
|
|
}
|
|
idx++;
|
|
dst = next;
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_NATIVE_WINDOWS */
|