/* * Driver interaction with generic Linux Wireless Extensions * Copyright (c) 2003-2015, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. * * This file implements a driver interface for the Linux Wireless Extensions. * When used with WE-18 or newer, this interface can be used as-is with number * of drivers. In addition to this, some of the common functions in this file * can be used by other driver interface implementations that use generic WE * ioctls, but require private ioctls for some of the functionality. */ #include "includes.h" #include #include #include #include #include #include #include "linux_wext.h" #include "common.h" #include "eloop.h" #include "common/ieee802_11_defs.h" #include "common/wpa_common.h" #include "priv_netlink.h" #include "netlink.h" #include "linux_ioctl.h" #include "rfkill.h" #include "driver.h" #include "driver_wext.h" static int wpa_driver_wext_flush_pmkid(void *priv); static int wpa_driver_wext_get_range(void *priv); static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv); static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv); static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg); int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv, int idx, u32 value) { struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.param.flags = idx & IW_AUTH_INDEX; iwr.u.param.value = value; if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) { if (errno != EOPNOTSUPP) { wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d " "value 0x%x) failed: %s)", idx, value, strerror(errno)); } ret = errno == EOPNOTSUPP ? -2 : -1; } return ret; } /** * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP * @priv: Pointer to private wext data from wpa_driver_wext_init() * @bssid: Buffer for BSSID * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_get_bssid(void *priv, u8 *bssid) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWAP]: %s", strerror(errno)); ret = -1; } os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN); return ret; } /** * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP * @priv: Pointer to private wext data from wpa_driver_wext_init() * @bssid: BSSID * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.ap_addr.sa_family = ARPHRD_ETHER; if (bssid) os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN); else os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN); if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWAP]: %s", strerror(errno)); ret = -1; } return ret; } /** * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID * @priv: Pointer to private wext data from wpa_driver_wext_init() * @ssid: Buffer for the SSID; must be at least 32 bytes long * Returns: SSID length on success, -1 on failure */ int wpa_driver_wext_get_ssid(void *priv, u8 *ssid) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.essid.pointer = (caddr_t) ssid; iwr.u.essid.length = SSID_MAX_LEN; if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWESSID]: %s", strerror(errno)); ret = -1; } else { ret = iwr.u.essid.length; if (ret > SSID_MAX_LEN) ret = SSID_MAX_LEN; /* Some drivers include nul termination in the SSID, so let's * remove it here before further processing. WE-21 changes this * to explicitly require the length _not_ to include nul * termination. */ if (ret > 0 && ssid[ret - 1] == '\0' && drv->we_version_compiled < 21) ret--; } return ret; } /** * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID * @priv: Pointer to private wext data from wpa_driver_wext_init() * @ssid: SSID * @ssid_len: Length of SSID (0..32) * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; char buf[33]; if (ssid_len > SSID_MAX_LEN) return -1; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); /* flags: 1 = ESSID is active, 0 = not (promiscuous) */ iwr.u.essid.flags = (ssid_len != 0); os_memset(buf, 0, sizeof(buf)); os_memcpy(buf, ssid, ssid_len); iwr.u.essid.pointer = (caddr_t) buf; if (drv->we_version_compiled < 21) { /* For historic reasons, set SSID length to include one extra * character, C string nul termination, even though SSID is * really an octet string that should not be presented as a C * string. Some Linux drivers decrement the length by one and * can thus end up missing the last octet of the SSID if the * length is not incremented here. WE-21 changes this to * explicitly require the length _not_ to include nul * termination. */ if (ssid_len) ssid_len++; } iwr.u.essid.length = ssid_len; if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID]: %s", strerror(errno)); ret = -1; } return ret; } /** * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ * @priv: Pointer to private wext data from wpa_driver_wext_init() * @freq: Frequency in MHz * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_set_freq(void *priv, int freq) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.freq.m = freq * 100000; iwr.u.freq.e = 1; if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s", strerror(errno)); ret = -1; } return ret; } static void wpa_driver_wext_event_wireless_custom(void *ctx, char *custom) { union wpa_event_data data; wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'", custom); os_memset(&data, 0, sizeof(data)); /* Host AP driver */ if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) { data.michael_mic_failure.unicast = os_strstr(custom, " unicast ") != NULL; /* TODO: parse parameters(?) */ wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data); } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) { char *spos; int bytes; u8 *req_ies = NULL, *resp_ies = NULL; spos = custom + 17; bytes = strspn(spos, "0123456789abcdefABCDEF"); if (!bytes || (bytes & 1)) return; bytes /= 2; req_ies = os_malloc(bytes); if (req_ies == NULL || hexstr2bin(spos, req_ies, bytes) < 0) goto done; data.assoc_info.req_ies = req_ies; data.assoc_info.req_ies_len = bytes; spos += bytes * 2; data.assoc_info.resp_ies = NULL; data.assoc_info.resp_ies_len = 0; if (os_strncmp(spos, " RespIEs=", 9) == 0) { spos += 9; bytes = strspn(spos, "0123456789abcdefABCDEF"); if (!bytes || (bytes & 1)) goto done; bytes /= 2; resp_ies = os_malloc(bytes); if (resp_ies == NULL || hexstr2bin(spos, resp_ies, bytes) < 0) goto done; data.assoc_info.resp_ies = resp_ies; data.assoc_info.resp_ies_len = bytes; } wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data); done: os_free(resp_ies); os_free(req_ies); } } static int wpa_driver_wext_event_wireless_michaelmicfailure( void *ctx, const char *ev, size_t len) { const struct iw_michaelmicfailure *mic; union wpa_event_data data; if (len < sizeof(*mic)) return -1; mic = (const struct iw_michaelmicfailure *) ev; wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: " "flags=0x%x src_addr=" MACSTR, mic->flags, MAC2STR(mic->src_addr.sa_data)); os_memset(&data, 0, sizeof(data)); data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP); wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data); return 0; } static int wpa_driver_wext_event_wireless_pmkidcand( struct wpa_driver_wext_data *drv, const char *ev, size_t len) { const struct iw_pmkid_cand *cand; union wpa_event_data data; const u8 *addr; if (len < sizeof(*cand)) return -1; cand = (const struct iw_pmkid_cand *) ev; addr = (const u8 *) cand->bssid.sa_data; wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: " "flags=0x%x index=%d bssid=" MACSTR, cand->flags, cand->index, MAC2STR(addr)); os_memset(&data, 0, sizeof(data)); os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN); data.pmkid_candidate.index = cand->index; data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH; wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data); return 0; } static int wpa_driver_wext_event_wireless_assocreqie( struct wpa_driver_wext_data *drv, const char *ev, int len) { if (len < 0) return -1; wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev, len); os_free(drv->assoc_req_ies); drv->assoc_req_ies = os_memdup(ev, len); if (drv->assoc_req_ies == NULL) { drv->assoc_req_ies_len = 0; return -1; } drv->assoc_req_ies_len = len; return 0; } static int wpa_driver_wext_event_wireless_assocrespie( struct wpa_driver_wext_data *drv, const char *ev, int len) { if (len < 0) return -1; wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev, len); os_free(drv->assoc_resp_ies); drv->assoc_resp_ies = os_memdup(ev, len); if (drv->assoc_resp_ies == NULL) { drv->assoc_resp_ies_len = 0; return -1; } drv->assoc_resp_ies_len = len; return 0; } static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv) { union wpa_event_data data; if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL) return; os_memset(&data, 0, sizeof(data)); if (drv->assoc_req_ies) { data.assoc_info.req_ies = drv->assoc_req_ies; data.assoc_info.req_ies_len = drv->assoc_req_ies_len; } if (drv->assoc_resp_ies) { data.assoc_info.resp_ies = drv->assoc_resp_ies; data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len; } wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data); os_free(drv->assoc_req_ies); drv->assoc_req_ies = NULL; os_free(drv->assoc_resp_ies); drv->assoc_resp_ies = NULL; } static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv, char *data, unsigned int len) { struct iw_event iwe_buf, *iwe = &iwe_buf; char *pos, *end, *custom, *buf; pos = data; end = data + len; while ((size_t) (end - pos) >= IW_EV_LCP_LEN) { /* Event data may be unaligned, so make a local, aligned copy * before processing. */ os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d", iwe->cmd, iwe->len); if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos) return; custom = pos + IW_EV_POINT_LEN; if (drv->we_version_compiled > 18 && (iwe->cmd == IWEVMICHAELMICFAILURE || iwe->cmd == IWEVCUSTOM || iwe->cmd == IWEVASSOCREQIE || iwe->cmd == IWEVASSOCRESPIE || iwe->cmd == IWEVPMKIDCAND)) { /* WE-19 removed the pointer from struct iw_point */ char *dpos = (char *) &iwe_buf.u.data.length; int dlen = dpos - (char *) &iwe_buf; os_memcpy(dpos, pos + IW_EV_LCP_LEN, sizeof(struct iw_event) - dlen); } else { os_memcpy(&iwe_buf, pos, sizeof(struct iw_event)); custom += IW_EV_POINT_OFF; } switch (iwe->cmd) { case SIOCGIWAP: wpa_printf(MSG_DEBUG, "Wireless event: new AP: " MACSTR, MAC2STR((u8 *) iwe->u.ap_addr.sa_data)); if (is_zero_ether_addr( (const u8 *) iwe->u.ap_addr.sa_data) || os_memcmp(iwe->u.ap_addr.sa_data, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0) { os_free(drv->assoc_req_ies); drv->assoc_req_ies = NULL; os_free(drv->assoc_resp_ies); drv->assoc_resp_ies = NULL; wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL); } else { wpa_driver_wext_event_assoc_ies(drv); wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL); } break; case IWEVMICHAELMICFAILURE: if (iwe->u.data.length > end - custom) { wpa_printf(MSG_DEBUG, "WEXT: Invalid " "IWEVMICHAELMICFAILURE length"); return; } wpa_driver_wext_event_wireless_michaelmicfailure( drv->ctx, custom, iwe->u.data.length); break; case IWEVCUSTOM: if (iwe->u.data.length > end - custom) { wpa_printf(MSG_DEBUG, "WEXT: Invalid " "IWEVCUSTOM length"); return; } buf = dup_binstr(custom, iwe->u.data.length); if (buf == NULL) return; wpa_driver_wext_event_wireless_custom(drv->ctx, buf); os_free(buf); break; case SIOCGIWSCAN: drv->scan_complete_events = 1; eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx); wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL); break; case IWEVASSOCREQIE: if (iwe->u.data.length > end - custom) { wpa_printf(MSG_DEBUG, "WEXT: Invalid " "IWEVASSOCREQIE length"); return; } wpa_driver_wext_event_wireless_assocreqie( drv, custom, iwe->u.data.length); break; case IWEVASSOCRESPIE: if (iwe->u.data.length > end - custom) { wpa_printf(MSG_DEBUG, "WEXT: Invalid " "IWEVASSOCRESPIE length"); return; } wpa_driver_wext_event_wireless_assocrespie( drv, custom, iwe->u.data.length); break; case IWEVPMKIDCAND: if (iwe->u.data.length > end - custom) { wpa_printf(MSG_DEBUG, "WEXT: Invalid " "IWEVPMKIDCAND length"); return; } wpa_driver_wext_event_wireless_pmkidcand( drv, custom, iwe->u.data.length); break; } pos += iwe->len; } } static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv, char *buf, size_t len, int del) { union wpa_event_data event; os_memset(&event, 0, sizeof(event)); if (len > sizeof(event.interface_status.ifname)) len = sizeof(event.interface_status.ifname) - 1; os_memcpy(event.interface_status.ifname, buf, len); event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED : EVENT_INTERFACE_ADDED; wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s", del ? "DEL" : "NEW", event.interface_status.ifname, del ? "removed" : "added"); if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) { if (del) { if (drv->if_removed) { wpa_printf(MSG_DEBUG, "WEXT: if_removed " "already set - ignore event"); return; } drv->if_removed = 1; } else { if (if_nametoindex(drv->ifname) == 0) { wpa_printf(MSG_DEBUG, "WEXT: Interface %s " "does not exist - ignore " "RTM_NEWLINK", drv->ifname); return; } if (!drv->if_removed) { wpa_printf(MSG_DEBUG, "WEXT: if_removed " "already cleared - ignore event"); return; } drv->if_removed = 0; } } wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event); } static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv, u8 *buf, size_t len) { int attrlen, rta_len; struct rtattr *attr; attrlen = len; attr = (struct rtattr *) buf; rta_len = RTA_ALIGN(sizeof(struct rtattr)); while (RTA_OK(attr, attrlen)) { if (attr->rta_type == IFLA_IFNAME) { if (os_strcmp(((char *) attr) + rta_len, drv->ifname) == 0) return 1; else break; } attr = RTA_NEXT(attr, attrlen); } return 0; } static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv, int ifindex, u8 *buf, size_t len) { if (drv->ifindex == ifindex || drv->ifindex2 == ifindex) return 1; if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) { drv->ifindex = if_nametoindex(drv->ifname); wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed " "interface"); wpa_driver_wext_finish_drv_init(drv); return 1; } return 0; } static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi, u8 *buf, size_t len) { struct wpa_driver_wext_data *drv = ctx; int attrlen, rta_len; struct rtattr *attr; char namebuf[IFNAMSIZ]; if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) { wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d", ifi->ifi_index); return; } wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x " "(%s%s%s%s)", drv->operstate, ifi->ifi_flags, (ifi->ifi_flags & IFF_UP) ? "[UP]" : "", (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "", (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "", (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : ""); if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) { wpa_printf(MSG_DEBUG, "WEXT: Interface down"); drv->if_disabled = 1; wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL); } if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) { if (if_indextoname(ifi->ifi_index, namebuf) && linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) { wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up " "event since interface %s is down", namebuf); } else if (if_nametoindex(drv->ifname) == 0) { wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up " "event since interface %s does not exist", drv->ifname); } else if (drv->if_removed) { wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up " "event since interface %s is marked " "removed", drv->ifname); } else { wpa_printf(MSG_DEBUG, "WEXT: Interface up"); drv->if_disabled = 0; wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL); } } /* * Some drivers send the association event before the operup event--in * this case, lifting operstate in wpa_driver_wext_set_operstate() * fails. This will hit us when wpa_supplicant does not need to do * IEEE 802.1X authentication */ if (drv->operstate == 1 && (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP && !(ifi->ifi_flags & IFF_RUNNING)) netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1, IF_OPER_UP); attrlen = len; attr = (struct rtattr *) buf; rta_len = RTA_ALIGN(sizeof(struct rtattr)); while (RTA_OK(attr, attrlen)) { if (attr->rta_type == IFLA_WIRELESS) { wpa_driver_wext_event_wireless( drv, ((char *) attr) + rta_len, attr->rta_len - rta_len); } else if (attr->rta_type == IFLA_IFNAME) { wpa_driver_wext_event_link(drv, ((char *) attr) + rta_len, attr->rta_len - rta_len, 0); } attr = RTA_NEXT(attr, attrlen); } } static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi, u8 *buf, size_t len) { struct wpa_driver_wext_data *drv = ctx; int attrlen, rta_len; struct rtattr *attr; attrlen = len; attr = (struct rtattr *) buf; rta_len = RTA_ALIGN(sizeof(struct rtattr)); while (RTA_OK(attr, attrlen)) { if (attr->rta_type == IFLA_IFNAME) { wpa_driver_wext_event_link(drv, ((char *) attr) + rta_len, attr->rta_len - rta_len, 1); } attr = RTA_NEXT(attr, attrlen); } } static void wpa_driver_wext_rfkill_blocked(void *ctx) { wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked"); /* * This may be for any interface; use ifdown event to disable * interface. */ } static void wpa_driver_wext_rfkill_unblocked(void *ctx) { struct wpa_driver_wext_data *drv = ctx; wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked"); if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) { wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP " "after rfkill unblock"); return; } /* rtnetlink ifup handler will report interface as enabled */ } static void wext_get_phy_name(struct wpa_driver_wext_data *drv) { /* Find phy (radio) to which this interface belongs */ char buf[90], *pos; int f, rv; drv->phyname[0] = '\0'; snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name", drv->ifname); f = open(buf, O_RDONLY); if (f < 0) { wpa_printf(MSG_DEBUG, "Could not open file %s: %s", buf, strerror(errno)); return; } rv = read(f, drv->phyname, sizeof(drv->phyname) - 1); close(f); if (rv < 0) { wpa_printf(MSG_DEBUG, "Could not read file %s: %s", buf, strerror(errno)); return; } drv->phyname[rv] = '\0'; pos = os_strchr(drv->phyname, '\n'); if (pos) *pos = '\0'; wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s", drv->ifname, drv->phyname); } /** * wpa_driver_wext_init - Initialize WE driver interface * @ctx: context to be used when calling wpa_supplicant functions, * e.g., wpa_supplicant_event() * @ifname: interface name, e.g., wlan0 * Returns: Pointer to private data, %NULL on failure */ void * wpa_driver_wext_init(void *ctx, const char *ifname) { struct wpa_driver_wext_data *drv; struct netlink_config *cfg; struct rfkill_config *rcfg; char path[128]; struct stat buf; drv = os_zalloc(sizeof(*drv)); if (drv == NULL) return NULL; drv->ctx = ctx; os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)); os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname); if (stat(path, &buf) == 0) { wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected"); drv->cfg80211 = 1; wext_get_phy_name(drv); } drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); if (drv->ioctl_sock < 0) { wpa_printf(MSG_ERROR, "socket(PF_INET,SOCK_DGRAM): %s", strerror(errno)); goto err1; } cfg = os_zalloc(sizeof(*cfg)); if (cfg == NULL) goto err1; cfg->ctx = drv; cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink; cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink; drv->netlink = netlink_init(cfg); if (drv->netlink == NULL) { os_free(cfg); goto err2; } rcfg = os_zalloc(sizeof(*rcfg)); if (rcfg == NULL) goto err3; rcfg->ctx = drv; os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname)); rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked; rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked; drv->rfkill = rfkill_init(rcfg); if (drv->rfkill == NULL) { wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available"); os_free(rcfg); } drv->mlme_sock = -1; if (wpa_driver_wext_finish_drv_init(drv) < 0) goto err3; wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1); return drv; err3: rfkill_deinit(drv->rfkill); netlink_deinit(drv->netlink); err2: close(drv->ioctl_sock); err1: os_free(drv); return NULL; } static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx) { wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL); } static int wext_hostap_ifname(struct wpa_driver_wext_data *drv, const char *ifname) { char buf[200], *res; int type; FILE *f; if (strcmp(ifname, ".") == 0 || strcmp(ifname, "..") == 0) return -1; snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net/%s/type", drv->ifname, ifname); f = fopen(buf, "r"); if (!f) return -1; res = fgets(buf, sizeof(buf), f); fclose(f); type = res ? atoi(res) : -1; wpa_printf(MSG_DEBUG, "WEXT: hostap ifname %s type %d", ifname, type); if (type == ARPHRD_IEEE80211) { wpa_printf(MSG_DEBUG, "WEXT: Found hostap driver wifi# interface (%s)", ifname); wpa_driver_wext_alternative_ifindex(drv, ifname); return 0; } return -1; } static int wext_add_hostap(struct wpa_driver_wext_data *drv) { char buf[200]; int n; struct dirent **names; int ret = -1; snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net", drv->ifname); n = scandir(buf, &names, NULL, alphasort); if (n < 0) return -1; while (n--) { if (ret < 0 && wext_hostap_ifname(drv, names[n]->d_name) == 0) ret = 0; free(names[n]); } free(names); return ret; } static void wext_check_hostap(struct wpa_driver_wext_data *drv) { char path[200], buf[200], *pos; ssize_t res; /* * Host AP driver may use both wlan# and wifi# interface in wireless * events. Since some of the versions included WE-18 support, let's add * the alternative ifindex also from driver_wext.c for the time being. * This may be removed at some point once it is believed that old * versions of the driver are not in use anymore. However, it looks like * the wifi# interface is still used in the current kernel tree, so it * may not really be possible to remove this before the Host AP driver * gets removed from the kernel. */ /* First, try to see if driver information is available from sysfs */ snprintf(path, sizeof(path), "/sys/class/net/%s/device/driver", drv->ifname); res = readlink(path, buf, sizeof(buf) - 1); if (res > 0) { buf[res] = '\0'; pos = strrchr(buf, '/'); if (pos) pos++; else pos = buf; wpa_printf(MSG_DEBUG, "WEXT: Driver: %s", pos); if (os_strncmp(pos, "hostap", 6) == 0 && wext_add_hostap(drv) == 0) return; } /* Second, use the old design with hardcoded ifname */ if (os_strncmp(drv->ifname, "wlan", 4) == 0) { char ifname2[IFNAMSIZ + 1]; os_strlcpy(ifname2, drv->ifname, sizeof(ifname2)); os_memcpy(ifname2, "wifi", 4); wpa_driver_wext_alternative_ifindex(drv, ifname2); } } static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv) { int send_rfkill_event = 0; if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) { if (rfkill_is_blocked(drv->rfkill)) { wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable " "interface '%s' due to rfkill", drv->ifname); drv->if_disabled = 1; send_rfkill_event = 1; } else { wpa_printf(MSG_ERROR, "WEXT: Could not set " "interface '%s' UP", drv->ifname); return -1; } } /* * Make sure that the driver does not have any obsolete PMKID entries. */ wpa_driver_wext_flush_pmkid(drv); if (wpa_driver_wext_set_mode(drv, 0) < 0) { wpa_printf(MSG_DEBUG, "Could not configure driver to use " "managed mode"); /* Try to use it anyway */ } wpa_driver_wext_get_range(drv); /* * Unlock the driver's BSSID and force to a random SSID to clear any * previous association the driver might have when the supplicant * starts up. */ wpa_driver_wext_disconnect(drv); drv->ifindex = if_nametoindex(drv->ifname); wext_check_hostap(drv); netlink_send_oper_ifla(drv->netlink, drv->ifindex, 1, IF_OPER_DORMANT); if (send_rfkill_event) { eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill, drv, drv->ctx); } return 0; } /** * wpa_driver_wext_deinit - Deinitialize WE driver interface * @priv: Pointer to private wext data from wpa_driver_wext_init() * * Shut down driver interface and processing of driver events. Free * private data buffer if one was allocated in wpa_driver_wext_init(). */ void wpa_driver_wext_deinit(void *priv) { struct wpa_driver_wext_data *drv = priv; wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0); eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx); eloop_cancel_timeout(wpa_driver_wext_send_rfkill, drv, drv->ctx); /* * Clear possibly configured driver parameters in order to make it * easier to use the driver after wpa_supplicant has been terminated. */ wpa_driver_wext_disconnect(drv); netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP); netlink_deinit(drv->netlink); rfkill_deinit(drv->rfkill); if (drv->mlme_sock >= 0) eloop_unregister_read_sock(drv->mlme_sock); (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0); close(drv->ioctl_sock); if (drv->mlme_sock >= 0) close(drv->mlme_sock); os_free(drv->assoc_req_ies); os_free(drv->assoc_resp_ies); os_free(drv); } /** * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion * @eloop_ctx: Unused * @timeout_ctx: ctx argument given to wpa_driver_wext_init() * * This function can be used as registered timeout when starting a scan to * generate a scan completed event if the driver does not report this. */ void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx) { wpa_printf(MSG_DEBUG, "Scan timeout - try to get results"); wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL); } /** * wpa_driver_wext_scan - Request the driver to initiate scan * @priv: Pointer to private wext data from wpa_driver_wext_init() * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.) * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0, timeout; struct iw_scan_req req; const u8 *ssid = params->ssids[0].ssid; size_t ssid_len = params->ssids[0].ssid_len; if (ssid_len > IW_ESSID_MAX_SIZE) { wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)", __FUNCTION__, (unsigned long) ssid_len); return -1; } os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); if (ssid && ssid_len) { os_memset(&req, 0, sizeof(req)); req.essid_len = ssid_len; req.bssid.sa_family = ARPHRD_ETHER; os_memset(req.bssid.sa_data, 0xff, ETH_ALEN); os_memcpy(req.essid, ssid, ssid_len); iwr.u.data.pointer = (caddr_t) &req; iwr.u.data.length = sizeof(req); iwr.u.data.flags = IW_SCAN_THIS_ESSID; } if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]: %s", strerror(errno)); ret = -1; } /* Not all drivers generate "scan completed" wireless event, so try to * read results after a timeout. */ timeout = 10; if (drv->scan_complete_events) { /* * The driver seems to deliver SIOCGIWSCAN events to notify * when scan is complete, so use longer timeout to avoid race * conditions with scanning and following association request. */ timeout = 30; } wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d " "seconds", ret, timeout); eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx); eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv, drv->ctx); return ret; } static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv, size_t *len) { struct iwreq iwr; u8 *res_buf; size_t res_buf_len; res_buf_len = IW_SCAN_MAX_DATA; for (;;) { res_buf = os_malloc(res_buf_len); if (res_buf == NULL) return NULL; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.data.pointer = res_buf; iwr.u.data.length = res_buf_len; if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0) break; if (errno == E2BIG && res_buf_len < 65535) { os_free(res_buf); res_buf = NULL; res_buf_len *= 2; if (res_buf_len > 65535) res_buf_len = 65535; /* 16-bit length field */ wpa_printf(MSG_DEBUG, "Scan results did not fit - " "trying larger buffer (%lu bytes)", (unsigned long) res_buf_len); } else { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %s", strerror(errno)); os_free(res_buf); return NULL; } } if (iwr.u.data.length > res_buf_len) { os_free(res_buf); return NULL; } *len = iwr.u.data.length; return res_buf; } /* * Data structure for collecting WEXT scan results. This is needed to allow * the various methods of reporting IEs to be combined into a single IE buffer. */ struct wext_scan_data { struct wpa_scan_res res; u8 *ie; size_t ie_len; u8 ssid[SSID_MAX_LEN]; size_t ssid_len; int maxrate; }; static void wext_get_scan_mode(struct iw_event *iwe, struct wext_scan_data *res) { if (iwe->u.mode == IW_MODE_ADHOC) res->res.caps |= IEEE80211_CAP_IBSS; else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA) res->res.caps |= IEEE80211_CAP_ESS; } static void wext_get_scan_ssid(struct iw_event *iwe, struct wext_scan_data *res, char *custom, char *end) { int ssid_len = iwe->u.essid.length; if (ssid_len > end - custom) return; if (iwe->u.essid.flags && ssid_len > 0 && ssid_len <= IW_ESSID_MAX_SIZE) { os_memcpy(res->ssid, custom, ssid_len); res->ssid_len = ssid_len; } } static void wext_get_scan_freq(struct iw_event *iwe, struct wext_scan_data *res) { int divi = 1000000, i; if (iwe->u.freq.e == 0) { /* * Some drivers do not report frequency, but a channel. * Try to map this to frequency by assuming they are using * IEEE 802.11b/g. But don't overwrite a previously parsed * frequency if the driver sends both frequency and channel, * since the driver may be sending an A-band channel that we * don't handle here. */ if (res->res.freq) return; if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) { res->res.freq = 2407 + 5 * iwe->u.freq.m; return; } else if (iwe->u.freq.m == 14) { res->res.freq = 2484; return; } } if (iwe->u.freq.e > 6) { wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID=" MACSTR " m=%d e=%d)", MAC2STR(res->res.bssid), iwe->u.freq.m, iwe->u.freq.e); return; } for (i = 0; i < iwe->u.freq.e; i++) divi /= 10; res->res.freq = iwe->u.freq.m / divi; } static void wext_get_scan_qual(struct wpa_driver_wext_data *drv, struct iw_event *iwe, struct wext_scan_data *res) { res->res.qual = iwe->u.qual.qual; res->res.noise = iwe->u.qual.noise; res->res.level = iwe->u.qual.level; if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID) res->res.flags |= WPA_SCAN_QUAL_INVALID; if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID) res->res.flags |= WPA_SCAN_LEVEL_INVALID; if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID) res->res.flags |= WPA_SCAN_NOISE_INVALID; if (iwe->u.qual.updated & IW_QUAL_DBM) res->res.flags |= WPA_SCAN_LEVEL_DBM; if ((iwe->u.qual.updated & IW_QUAL_DBM) || ((iwe->u.qual.level != 0) && (iwe->u.qual.level > drv->max_level))) { if (iwe->u.qual.level >= 64) res->res.level -= 0x100; if (iwe->u.qual.noise >= 64) res->res.noise -= 0x100; } } static void wext_get_scan_encode(struct iw_event *iwe, struct wext_scan_data *res) { if (!(iwe->u.data.flags & IW_ENCODE_DISABLED)) res->res.caps |= IEEE80211_CAP_PRIVACY; } static void wext_get_scan_rate(struct iw_event *iwe, struct wext_scan_data *res, char *pos, char *end) { int maxrate; char *custom = pos + IW_EV_LCP_LEN; struct iw_param p; size_t clen; clen = iwe->len; if (clen > (size_t) (end - custom)) return; maxrate = 0; while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) { /* Note: may be misaligned, make a local, aligned copy */ os_memcpy(&p, custom, sizeof(struct iw_param)); if (p.value > maxrate) maxrate = p.value; clen -= sizeof(struct iw_param); custom += sizeof(struct iw_param); } /* Convert the maxrate from WE-style (b/s units) to * 802.11 rates (500000 b/s units). */ res->maxrate = maxrate / 500000; } static void wext_get_scan_iwevgenie(struct iw_event *iwe, struct wext_scan_data *res, char *custom, char *end) { char *genie, *gpos, *gend; u8 *tmp; if (iwe->u.data.length == 0) return; gpos = genie = custom; gend = genie + iwe->u.data.length; if (gend > end) { wpa_printf(MSG_INFO, "IWEVGENIE overflow"); return; } tmp = os_realloc(res->ie, res->ie_len + gend - gpos); if (tmp == NULL) return; os_memcpy(tmp + res->ie_len, gpos, gend - gpos); res->ie = tmp; res->ie_len += gend - gpos; } static void wext_get_scan_custom(struct iw_event *iwe, struct wext_scan_data *res, char *custom, char *end) { size_t clen; u8 *tmp; clen = iwe->u.data.length; if (clen > (size_t) (end - custom)) return; if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) { char *spos; int bytes; spos = custom + 7; bytes = custom + clen - spos; if (bytes & 1 || bytes == 0) return; bytes /= 2; tmp = os_realloc(res->ie, res->ie_len + bytes); if (tmp == NULL) return; res->ie = tmp; if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0) return; res->ie_len += bytes; } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) { char *spos; int bytes; spos = custom + 7; bytes = custom + clen - spos; if (bytes & 1 || bytes == 0) return; bytes /= 2; tmp = os_realloc(res->ie, res->ie_len + bytes); if (tmp == NULL) return; res->ie = tmp; if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0) return; res->ie_len += bytes; } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) { char *spos; int bytes; u8 bin[8]; spos = custom + 4; bytes = custom + clen - spos; if (bytes != 16) { wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes); return; } bytes /= 2; if (hexstr2bin(spos, bin, bytes) < 0) { wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value"); return; } res->res.tsf += WPA_GET_BE64(bin); } } static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd) { return drv->we_version_compiled > 18 && (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE || cmd == IWEVGENIE || cmd == IWEVCUSTOM); } static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res, struct wext_scan_data *data) { struct wpa_scan_res **tmp; struct wpa_scan_res *r; size_t extra_len; u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL; /* Figure out whether we need to fake any IEs */ pos = data->ie; end = pos + data->ie_len; while (pos && end - pos > 1) { if (2 + pos[1] > end - pos) break; if (pos[0] == WLAN_EID_SSID) ssid_ie = pos; else if (pos[0] == WLAN_EID_SUPP_RATES) rate_ie = pos; else if (pos[0] == WLAN_EID_EXT_SUPP_RATES) rate_ie = pos; pos += 2 + pos[1]; } extra_len = 0; if (ssid_ie == NULL) extra_len += 2 + data->ssid_len; if (rate_ie == NULL && data->maxrate) extra_len += 3; r = os_zalloc(sizeof(*r) + extra_len + data->ie_len); if (r == NULL) return; os_memcpy(r, &data->res, sizeof(*r)); r->ie_len = extra_len + data->ie_len; pos = (u8 *) (r + 1); if (ssid_ie == NULL) { /* * Generate a fake SSID IE since the driver did not report * a full IE list. */ *pos++ = WLAN_EID_SSID; *pos++ = data->ssid_len; os_memcpy(pos, data->ssid, data->ssid_len); pos += data->ssid_len; } if (rate_ie == NULL && data->maxrate) { /* * Generate a fake Supported Rates IE since the driver did not * report a full IE list. */ *pos++ = WLAN_EID_SUPP_RATES; *pos++ = 1; *pos++ = data->maxrate; } if (data->ie) os_memcpy(pos, data->ie, data->ie_len); tmp = os_realloc_array(res->res, res->num + 1, sizeof(struct wpa_scan_res *)); if (tmp == NULL) { os_free(r); return; } tmp[res->num++] = r; res->res = tmp; } /** * wpa_driver_wext_get_scan_results - Fetch the latest scan results * @priv: Pointer to private wext data from wpa_driver_wext_init() * Returns: Scan results on success, -1 on failure */ struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv) { struct wpa_driver_wext_data *drv = priv; size_t len; int first; u8 *res_buf; struct iw_event iwe_buf, *iwe = &iwe_buf; char *pos, *end, *custom; struct wpa_scan_results *res; struct wext_scan_data data; res_buf = wpa_driver_wext_giwscan(drv, &len); if (res_buf == NULL) return NULL; first = 1; res = os_zalloc(sizeof(*res)); if (res == NULL) { os_free(res_buf); return NULL; } pos = (char *) res_buf; end = (char *) res_buf + len; os_memset(&data, 0, sizeof(data)); while ((size_t) (end - pos) >= IW_EV_LCP_LEN) { /* Event data may be unaligned, so make a local, aligned copy * before processing. */ os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN); if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos) break; custom = pos + IW_EV_POINT_LEN; if (wext_19_iw_point(drv, iwe->cmd)) { /* WE-19 removed the pointer from struct iw_point */ char *dpos = (char *) &iwe_buf.u.data.length; int dlen = dpos - (char *) &iwe_buf; os_memcpy(dpos, pos + IW_EV_LCP_LEN, sizeof(struct iw_event) - dlen); } else { os_memcpy(&iwe_buf, pos, sizeof(struct iw_event)); custom += IW_EV_POINT_OFF; } switch (iwe->cmd) { case SIOCGIWAP: if (!first) wpa_driver_wext_add_scan_entry(res, &data); first = 0; os_free(data.ie); os_memset(&data, 0, sizeof(data)); os_memcpy(data.res.bssid, iwe->u.ap_addr.sa_data, ETH_ALEN); break; case SIOCGIWMODE: wext_get_scan_mode(iwe, &data); break; case SIOCGIWESSID: wext_get_scan_ssid(iwe, &data, custom, end); break; case SIOCGIWFREQ: wext_get_scan_freq(iwe, &data); break; case IWEVQUAL: wext_get_scan_qual(drv, iwe, &data); break; case SIOCGIWENCODE: wext_get_scan_encode(iwe, &data); break; case SIOCGIWRATE: wext_get_scan_rate(iwe, &data, pos, end); break; case IWEVGENIE: wext_get_scan_iwevgenie(iwe, &data, custom, end); break; case IWEVCUSTOM: wext_get_scan_custom(iwe, &data, custom, end); break; } pos += iwe->len; } os_free(res_buf); res_buf = NULL; if (!first) wpa_driver_wext_add_scan_entry(res, &data); os_free(data.ie); wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)", (unsigned long) len, (unsigned long) res->num); return res; } static int wpa_driver_wext_get_range(void *priv) { struct wpa_driver_wext_data *drv = priv; struct iw_range *range; struct iwreq iwr; int minlen; size_t buflen; /* * Use larger buffer than struct iw_range in order to allow the * structure to grow in the future. */ buflen = sizeof(struct iw_range) + 500; range = os_zalloc(buflen); if (range == NULL) return -1; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.data.pointer = (caddr_t) range; iwr.u.data.length = buflen; minlen = ((char *) &range->enc_capa) - (char *) range + sizeof(range->enc_capa); if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s", strerror(errno)); os_free(range); return -1; } else if (iwr.u.data.length >= minlen && range->we_version_compiled >= 18) { wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d " "WE(source)=%d enc_capa=0x%x", range->we_version_compiled, range->we_version_source, range->enc_capa); drv->has_capability = 1; drv->we_version_compiled = range->we_version_compiled; if (range->enc_capa & IW_ENC_CAPA_WPA) { drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA | WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK; } if (range->enc_capa & IW_ENC_CAPA_WPA2) { drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 | WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK; } drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 | WPA_DRIVER_CAPA_ENC_WEP104; drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128; if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP) drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP; if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP) drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP; if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE) drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE; drv->capa.auth = WPA_DRIVER_AUTH_OPEN | WPA_DRIVER_AUTH_SHARED | WPA_DRIVER_AUTH_LEAP; drv->capa.max_scan_ssids = 1; wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x " "flags 0x%llx", drv->capa.key_mgmt, drv->capa.enc, (unsigned long long) drv->capa.flags); } else { wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - " "assuming WPA is not supported"); } drv->max_level = range->max_qual.level; os_free(range); return 0; } static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv, const u8 *psk) { struct iw_encode_ext *ext; struct iwreq iwr; int ret; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE)) return 0; if (!psk) return 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); ext = os_zalloc(sizeof(*ext) + PMK_LEN); if (ext == NULL) return -1; iwr.u.encoding.pointer = (caddr_t) ext; iwr.u.encoding.length = sizeof(*ext) + PMK_LEN; ext->key_len = PMK_LEN; os_memcpy(&ext->key, psk, ext->key_len); ext->alg = IW_ENCODE_ALG_PMK; ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr); if (ret < 0) wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK: %s", strerror(errno)); os_free(ext); return ret; } static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg, const u8 *addr, int key_idx, int set_tx, const u8 *seq, size_t seq_len, const u8 *key, size_t key_len) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; struct iw_encode_ext *ext; if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) { wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu", __FUNCTION__, (unsigned long) seq_len); return -1; } ext = os_zalloc(sizeof(*ext) + key_len); if (ext == NULL) return -1; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.encoding.flags = key_idx + 1; iwr.u.encoding.flags |= IW_ENCODE_TEMP; if (alg == WPA_ALG_NONE) iwr.u.encoding.flags |= IW_ENCODE_DISABLED; iwr.u.encoding.pointer = (caddr_t) ext; iwr.u.encoding.length = sizeof(*ext) + key_len; if (addr == NULL || is_broadcast_ether_addr(addr)) ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY; if (set_tx) ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY; ext->addr.sa_family = ARPHRD_ETHER; if (addr) os_memcpy(ext->addr.sa_data, addr, ETH_ALEN); else os_memset(ext->addr.sa_data, 0xff, ETH_ALEN); if (key && key_len) { os_memcpy(ext + 1, key, key_len); ext->key_len = key_len; } switch (alg) { case WPA_ALG_NONE: ext->alg = IW_ENCODE_ALG_NONE; break; case WPA_ALG_WEP: ext->alg = IW_ENCODE_ALG_WEP; break; case WPA_ALG_TKIP: ext->alg = IW_ENCODE_ALG_TKIP; break; case WPA_ALG_CCMP: ext->alg = IW_ENCODE_ALG_CCMP; break; case WPA_ALG_PMK: ext->alg = IW_ENCODE_ALG_PMK; break; #ifdef CONFIG_IEEE80211W case WPA_ALG_IGTK: ext->alg = IW_ENCODE_ALG_AES_CMAC; break; #endif /* CONFIG_IEEE80211W */ default: wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d", __FUNCTION__, alg); os_free(ext); return -1; } if (seq && seq_len) { ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID; os_memcpy(ext->rx_seq, seq, seq_len); } if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) { ret = errno == EOPNOTSUPP ? -2 : -1; if (errno == ENODEV) { /* * ndiswrapper seems to be returning incorrect error * code.. */ ret = -2; } wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]: %s", strerror(errno)); } os_free(ext); return ret; } /** * wpa_driver_wext_set_key - Configure encryption key * @priv: Pointer to private wext data from wpa_driver_wext_init() * @priv: Private driver interface data * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP, * %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key. * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for * broadcast/default keys * @key_idx: key index (0..3), usually 0 for unicast keys * @set_tx: Configure this key as the default Tx key (only used when * driver does not support separate unicast/individual key * @seq: Sequence number/packet number, seq_len octets, the next * packet number to be used for in replay protection; configured * for Rx keys (in most cases, this is only used with broadcast * keys and set to zero for unicast keys) * @seq_len: Length of the seq, depends on the algorithm: * TKIP: 6 octets, CCMP: 6 octets * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key, * 8-byte Rx Mic Key * @key_len: Length of the key buffer in octets (WEP: 5 or 13, * TKIP: 32, CCMP: 16) * Returns: 0 on success, -1 on failure * * This function uses SIOCSIWENCODEEXT by default, but tries to use * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key. */ int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg, const u8 *addr, int key_idx, int set_tx, const u8 *seq, size_t seq_len, const u8 *key, size_t key_len) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu " "key_len=%lu", __FUNCTION__, alg, key_idx, set_tx, (unsigned long) seq_len, (unsigned long) key_len); ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx, seq, seq_len, key, key_len); if (ret == 0) return 0; if (ret == -2 && (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) { wpa_printf(MSG_DEBUG, "Driver did not support " "SIOCSIWENCODEEXT, trying SIOCSIWENCODE"); ret = 0; } else { wpa_printf(MSG_DEBUG, "Driver did not support " "SIOCSIWENCODEEXT"); return ret; } os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.encoding.flags = key_idx + 1; iwr.u.encoding.flags |= IW_ENCODE_TEMP; if (alg == WPA_ALG_NONE) iwr.u.encoding.flags |= IW_ENCODE_DISABLED; iwr.u.encoding.pointer = (caddr_t) key; iwr.u.encoding.length = key_len; if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s", strerror(errno)); ret = -1; } if (set_tx && alg != WPA_ALG_NONE) { os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.encoding.flags = key_idx + 1; iwr.u.encoding.flags |= IW_ENCODE_TEMP; iwr.u.encoding.pointer = (caddr_t) NULL; iwr.u.encoding.length = 0; if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE] (set_tx): %s", strerror(errno)); ret = -1; } } return ret; } static int wpa_driver_wext_set_countermeasures(void *priv, int enabled) { struct wpa_driver_wext_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); return wpa_driver_wext_set_auth_param(drv, IW_AUTH_TKIP_COUNTERMEASURES, enabled); } static int wpa_driver_wext_set_drop_unencrypted(void *priv, int enabled) { struct wpa_driver_wext_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); drv->use_crypt = enabled; return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, enabled); } static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv, const u8 *addr, int cmd, int reason_code) { struct iwreq iwr; struct iw_mlme mlme; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); os_memset(&mlme, 0, sizeof(mlme)); mlme.cmd = cmd; mlme.reason_code = reason_code; mlme.addr.sa_family = ARPHRD_ETHER; os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN); iwr.u.data.pointer = (caddr_t) &mlme; iwr.u.data.length = sizeof(mlme); if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]: %s", strerror(errno)); ret = -1; } return ret; } static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv) { struct iwreq iwr; const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 }; u8 ssid[SSID_MAX_LEN]; int i; /* * Only force-disconnect when the card is in infrastructure mode, * otherwise the driver might interpret the cleared BSSID and random * SSID as an attempt to create a new ad-hoc network. */ os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s", strerror(errno)); iwr.u.mode = IW_MODE_INFRA; } if (iwr.u.mode == IW_MODE_INFRA) { /* Clear the BSSID selection */ if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) { wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID " "selection on disconnect"); } if (drv->cfg80211) { /* * cfg80211 supports SIOCSIWMLME commands, so there is * no need for the random SSID hack, but clear the * SSID. */ if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) { wpa_printf(MSG_DEBUG, "WEXT: Failed to clear " "SSID on disconnect"); } return; } /* * Set a random SSID to make sure the driver will not be trying * to associate with something even if it does not understand * SIOCSIWMLME commands (or tries to associate automatically * after deauth/disassoc). */ for (i = 0; i < SSID_MAX_LEN; i++) ssid[i] = rand() & 0xFF; if (wpa_driver_wext_set_ssid(drv, ssid, SSID_MAX_LEN) < 0) { wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus " "SSID to disconnect"); } } } static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr, int reason_code) { struct wpa_driver_wext_data *drv = priv; int ret; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code); wpa_driver_wext_disconnect(drv); return ret; } static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie, size_t ie_len) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.data.pointer = (caddr_t) ie; iwr.u.data.length = ie_len; if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]: %s", strerror(errno)); ret = -1; } return ret; } int wpa_driver_wext_cipher2wext(int cipher) { switch (cipher) { case WPA_CIPHER_NONE: return IW_AUTH_CIPHER_NONE; case WPA_CIPHER_WEP40: return IW_AUTH_CIPHER_WEP40; case WPA_CIPHER_TKIP: return IW_AUTH_CIPHER_TKIP; case WPA_CIPHER_CCMP: return IW_AUTH_CIPHER_CCMP; case WPA_CIPHER_WEP104: return IW_AUTH_CIPHER_WEP104; default: return 0; } } int wpa_driver_wext_keymgmt2wext(int keymgmt) { switch (keymgmt) { case WPA_KEY_MGMT_IEEE8021X: case WPA_KEY_MGMT_IEEE8021X_NO_WPA: return IW_AUTH_KEY_MGMT_802_1X; case WPA_KEY_MGMT_PSK: return IW_AUTH_KEY_MGMT_PSK; default: return 0; } } static int wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv, struct wpa_driver_associate_params *params) { struct iwreq iwr; int ret = 0; wpa_printf(MSG_DEBUG, "WEXT: Driver did not support " "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE"); os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); /* Just changing mode, not actual keys */ iwr.u.encoding.flags = 0; iwr.u.encoding.pointer = (caddr_t) NULL; iwr.u.encoding.length = 0; /* * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two * different things. Here they are used to indicate Open System vs. * Shared Key authentication algorithm. However, some drivers may use * them to select between open/restricted WEP encrypted (open = allow * both unencrypted and encrypted frames; restricted = only allow * encrypted frames). */ if (!drv->use_crypt) { iwr.u.encoding.flags |= IW_ENCODE_DISABLED; } else { if (params->auth_alg & WPA_AUTH_ALG_OPEN) iwr.u.encoding.flags |= IW_ENCODE_OPEN; if (params->auth_alg & WPA_AUTH_ALG_SHARED) iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED; } if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s", strerror(errno)); ret = -1; } return ret; } int wpa_driver_wext_associate(void *priv, struct wpa_driver_associate_params *params) { struct wpa_driver_wext_data *drv = priv; int ret = 0; int allow_unencrypted_eapol; int value; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); if (drv->cfg80211) { /* * Stop cfg80211 from trying to associate before we are done * with all parameters. */ if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) { wpa_printf(MSG_DEBUG, "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)"); /* continue anyway */ } } if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted) < 0) ret = -1; if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0) ret = -1; if (wpa_driver_wext_set_mode(drv, params->mode) < 0) ret = -1; /* * If the driver did not support SIOCSIWAUTH, fallback to * SIOCSIWENCODE here. */ if (drv->auth_alg_fallback && wpa_driver_wext_auth_alg_fallback(drv, params) < 0) ret = -1; if (!params->bssid && wpa_driver_wext_set_bssid(drv, NULL) < 0) ret = -1; /* TODO: should consider getting wpa version and cipher/key_mgmt suites * from configuration, not from here, where only the selected suite is * available */ if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0) ret = -1; if (params->wpa_proto & WPA_PROTO_RSN) value = IW_AUTH_WPA_VERSION_WPA2; else if (params->wpa_proto & WPA_PROTO_WPA) value = IW_AUTH_WPA_VERSION_WPA; else value = IW_AUTH_WPA_VERSION_DISABLED; if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_VERSION, value) < 0) ret = -1; value = wpa_driver_wext_cipher2wext(params->pairwise_suite); if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_CIPHER_PAIRWISE, value) < 0) ret = -1; value = wpa_driver_wext_cipher2wext(params->group_suite); if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_CIPHER_GROUP, value) < 0) ret = -1; value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite); if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_KEY_MGMT, value) < 0) ret = -1; value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE || params->pairwise_suite != WPA_CIPHER_NONE || params->group_suite != WPA_CIPHER_NONE || (params->wpa_proto & (WPA_PROTO_RSN | WPA_PROTO_WPA)); if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_PRIVACY_INVOKED, value) < 0) ret = -1; /* Allow unencrypted EAPOL messages even if pairwise keys are set when * not using WPA. IEEE 802.1X specifies that these frames are not * encrypted, but WPA encrypts them when pairwise keys are in use. */ if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X || params->key_mgmt_suite == WPA_KEY_MGMT_PSK) allow_unencrypted_eapol = 0; else allow_unencrypted_eapol = 1; if (wpa_driver_wext_set_psk(drv, params->psk) < 0) ret = -1; if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_RX_UNENCRYPTED_EAPOL, allow_unencrypted_eapol) < 0) ret = -1; #ifdef CONFIG_IEEE80211W switch (params->mgmt_frame_protection) { case NO_MGMT_FRAME_PROTECTION: value = IW_AUTH_MFP_DISABLED; break; case MGMT_FRAME_PROTECTION_OPTIONAL: value = IW_AUTH_MFP_OPTIONAL; break; case MGMT_FRAME_PROTECTION_REQUIRED: value = IW_AUTH_MFP_REQUIRED; break; }; if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0) ret = -1; #endif /* CONFIG_IEEE80211W */ if (params->freq.freq && wpa_driver_wext_set_freq(drv, params->freq.freq) < 0) ret = -1; if (!drv->cfg80211 && wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0) ret = -1; if (params->bssid && wpa_driver_wext_set_bssid(drv, params->bssid) < 0) ret = -1; if (drv->cfg80211 && wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0) ret = -1; return ret; } static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg) { struct wpa_driver_wext_data *drv = priv; int algs = 0, res; if (auth_alg & WPA_AUTH_ALG_OPEN) algs |= IW_AUTH_ALG_OPEN_SYSTEM; if (auth_alg & WPA_AUTH_ALG_SHARED) algs |= IW_AUTH_ALG_SHARED_KEY; if (auth_alg & WPA_AUTH_ALG_LEAP) algs |= IW_AUTH_ALG_LEAP; if (algs == 0) { /* at least one algorithm should be set */ algs = IW_AUTH_ALG_OPEN_SYSTEM; } res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG, algs); drv->auth_alg_fallback = res == -2; return res; } /** * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE * @priv: Pointer to private wext data from wpa_driver_wext_init() * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS * Returns: 0 on success, -1 on failure */ int wpa_driver_wext_set_mode(void *priv, int mode) { struct wpa_driver_wext_data *drv = priv; struct iwreq iwr; int ret = -1; unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.mode = new_mode; if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) { ret = 0; goto done; } if (errno != EBUSY) { wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s", strerror(errno)); goto done; } /* mac80211 doesn't allow mode changes while the device is up, so if * the device isn't in the mode we're about to change to, take device * down, try to set the mode again, and bring it back up. */ if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) { wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s", strerror(errno)); goto done; } if (iwr.u.mode == new_mode) { ret = 0; goto done; } if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) { /* Try to set the mode again while the interface is down */ iwr.u.mode = new_mode; if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0) wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s", strerror(errno)); else ret = 0; (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1); } done: return ret; } static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv, u32 cmd, const u8 *bssid, const u8 *pmkid) { struct iwreq iwr; struct iw_pmksa pmksa; int ret = 0; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); os_memset(&pmksa, 0, sizeof(pmksa)); pmksa.cmd = cmd; pmksa.bssid.sa_family = ARPHRD_ETHER; if (bssid) os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN); if (pmkid) os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN); iwr.u.data.pointer = (caddr_t) &pmksa; iwr.u.data.length = sizeof(pmksa); if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) { if (errno != EOPNOTSUPP) wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]: %s", strerror(errno)); ret = -1; } return ret; } static int wpa_driver_wext_add_pmkid(void *priv, struct wpa_pmkid_params *params) { struct wpa_driver_wext_data *drv = priv; return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, params->bssid, params->pmkid); } static int wpa_driver_wext_remove_pmkid(void *priv, struct wpa_pmkid_params *params) { struct wpa_driver_wext_data *drv = priv; return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, params->bssid, params->pmkid); } static int wpa_driver_wext_flush_pmkid(void *priv) { struct wpa_driver_wext_data *drv = priv; return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL); } int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa) { struct wpa_driver_wext_data *drv = priv; if (!drv->has_capability) return -1; os_memcpy(capa, &drv->capa, sizeof(*capa)); return 0; } int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv, const char *ifname) { if (ifname == NULL) { drv->ifindex2 = -1; return 0; } drv->ifindex2 = if_nametoindex(ifname); if (drv->ifindex2 <= 0) return -1; wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for " "wireless events", drv->ifindex2, ifname); return 0; } int wpa_driver_wext_set_operstate(void *priv, int state) { struct wpa_driver_wext_data *drv = priv; wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)", __func__, drv->operstate, state, state ? "UP" : "DORMANT"); drv->operstate = state; return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1, state ? IF_OPER_UP : IF_OPER_DORMANT); } int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv) { return drv->we_version_compiled; } static const char * wext_get_radio_name(void *priv) { struct wpa_driver_wext_data *drv = priv; return drv->phyname; } static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si) { struct wpa_driver_wext_data *drv = priv; struct iw_statistics stats; struct iwreq iwr; os_memset(si, 0, sizeof(*si)); si->current_signal = -9999; si->current_noise = 9999; si->chanwidth = CHAN_WIDTH_UNKNOWN; os_memset(&iwr, 0, sizeof(iwr)); os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ); iwr.u.data.pointer = (caddr_t) &stats; iwr.u.data.length = sizeof(stats); iwr.u.data.flags = 1; if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) { wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s", strerror(errno)); return -1; } si->current_signal = stats.qual.level - ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0); si->current_noise = stats.qual.noise - ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0); return 0; } static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen) { struct wpa_driver_wext_data *drv = priv; int res; char *pos, *end; unsigned char addr[ETH_ALEN]; pos = buf; end = buf + buflen; if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr)) return -1; res = os_snprintf(pos, end - pos, "ifindex=%d\n" "ifname=%s\n" "addr=" MACSTR "\n", drv->ifindex, drv->ifname, MAC2STR(addr)); if (os_snprintf_error(end - pos, res)) return pos - buf; pos += res; return pos - buf; } const struct wpa_driver_ops wpa_driver_wext_ops = { .name = "wext", .desc = "Linux wireless extensions (generic)", .get_bssid = wpa_driver_wext_get_bssid, .get_ssid = wpa_driver_wext_get_ssid, .set_key = wpa_driver_wext_set_key, .set_countermeasures = wpa_driver_wext_set_countermeasures, .scan2 = wpa_driver_wext_scan, .get_scan_results2 = wpa_driver_wext_get_scan_results, .deauthenticate = wpa_driver_wext_deauthenticate, .associate = wpa_driver_wext_associate, .init = wpa_driver_wext_init, .deinit = wpa_driver_wext_deinit, .add_pmkid = wpa_driver_wext_add_pmkid, .remove_pmkid = wpa_driver_wext_remove_pmkid, .flush_pmkid = wpa_driver_wext_flush_pmkid, .get_capa = wpa_driver_wext_get_capa, .set_operstate = wpa_driver_wext_set_operstate, .get_radio_name = wext_get_radio_name, .signal_poll = wpa_driver_wext_signal_poll, .status = wpa_driver_wext_status, };