/* * WPA Supplicant - driver interaction with Linux nl80211/cfg80211 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Alternatively, this software may be distributed under the terms of BSD * license. * * See README and COPYING for more details. */ #include "includes.h" #include <sys/ioctl.h> #include <net/if_arp.h> #include <netlink/genl/genl.h> #include <netlink/genl/family.h> #include <netlink/genl/ctrl.h> #include "nl80211_copy.h" #ifdef CONFIG_CLIENT_MLME #include <netpacket/packet.h> #include <linux/if_ether.h> #include "radiotap.h" #include "radiotap_iter.h" #endif /* CONFIG_CLIENT_MLME */ #include "wireless_copy.h" #include "common.h" #include "driver.h" #include "eloop.h" #include "ieee802_11_defs.h" #ifndef IFF_LOWER_UP #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */ #endif #ifndef IFF_DORMANT #define IFF_DORMANT 0x20000 /* driver signals dormant */ #endif #ifndef IF_OPER_DORMANT #define IF_OPER_DORMANT 5 #endif #ifndef IF_OPER_UP #define IF_OPER_UP 6 #endif struct wpa_driver_nl80211_data { void *ctx; int wext_event_sock; int ioctl_sock; char ifname[IFNAMSIZ + 1]; int ifindex; int if_removed; u8 *assoc_req_ies; size_t assoc_req_ies_len; u8 *assoc_resp_ies; size_t assoc_resp_ies_len; struct wpa_driver_capa capa; int has_capability; int we_version_compiled; /* for set_auth_alg fallback */ int use_crypt; int auth_alg_fallback; int operstate; char mlmedev[IFNAMSIZ + 1]; int scan_complete_events; struct nl_handle *nl_handle; struct nl_cache *nl_cache; struct nl_cb *nl_cb; struct genl_family *nl80211; #ifdef CONFIG_CLIENT_MLME int monitor_sock; /* socket for monitor */ int monitor_ifidx; #endif /* CONFIG_CLIENT_MLME */ }; static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx); static int wpa_driver_nl80211_set_mode(void *priv, int mode); static int wpa_driver_nl80211_flush_pmkid(void *priv); static int wpa_driver_nl80211_get_range(void *priv); static void wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv); /* nl80211 code */ static int ack_handler(struct nl_msg *msg, void *arg) { int *err = arg; *err = 0; return NL_STOP; } static int finish_handler(struct nl_msg *msg, void *arg) { int *ret = arg; *ret = 0; return NL_SKIP; } static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { int *ret = arg; *ret = err->error; return NL_SKIP; } static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv, struct nl_msg *msg, int (*valid_handler)(struct nl_msg *, void *), void *valid_data) { struct nl_cb *cb; int err = -ENOMEM; cb = nl_cb_clone(drv->nl_cb); if (!cb) goto out; err = nl_send_auto_complete(drv->nl_handle, msg); if (err < 0) goto out; err = 1; nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err); nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err); nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err); if (valid_handler) nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, valid_handler, valid_data); while (err > 0) nl_recvmsgs(drv->nl_handle, cb); out: nl_cb_put(cb); nlmsg_free(msg); return err; } struct family_data { const char *group; int id; }; static int family_handler(struct nl_msg *msg, void *arg) { struct family_data *res = arg; struct nlattr *tb[CTRL_ATTR_MAX + 1]; struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); struct nlattr *mcgrp; int i; nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL); if (!tb[CTRL_ATTR_MCAST_GROUPS]) return NL_SKIP; nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) { struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1]; nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp), nla_len(mcgrp), NULL); if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] || !tb2[CTRL_ATTR_MCAST_GRP_ID] || os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]), res->group, nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0) continue; res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]); break; }; return NL_SKIP; } static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv, const char *family, const char *group) { struct nl_msg *msg; int ret = -1; struct family_data res = { group, -ENOENT }; msg = nlmsg_alloc(); if (!msg) return -ENOMEM; genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"), 0, 0, CTRL_CMD_GETFAMILY, 0); NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family); ret = send_and_recv_msgs(drv, msg, family_handler, &res); msg = NULL; if (ret == 0) ret = res.id; nla_put_failure: nlmsg_free(msg); return ret; } static int wpa_driver_nl80211_send_oper_ifla( struct wpa_driver_nl80211_data *drv, int linkmode, int operstate) { struct { struct nlmsghdr hdr; struct ifinfomsg ifinfo; char opts[16]; } req; struct rtattr *rta; static int nl_seq; ssize_t ret; os_memset(&req, 0, sizeof(req)); req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); req.hdr.nlmsg_type = RTM_SETLINK; req.hdr.nlmsg_flags = NLM_F_REQUEST; req.hdr.nlmsg_seq = ++nl_seq; req.hdr.nlmsg_pid = 0; req.ifinfo.ifi_family = AF_UNSPEC; req.ifinfo.ifi_type = 0; req.ifinfo.ifi_index = drv->ifindex; req.ifinfo.ifi_flags = 0; req.ifinfo.ifi_change = 0; if (linkmode != -1) { rta = aliasing_hide_typecast( ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)), struct rtattr); rta->rta_type = IFLA_LINKMODE; rta->rta_len = RTA_LENGTH(sizeof(char)); *((char *) RTA_DATA(rta)) = linkmode; req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) + RTA_LENGTH(sizeof(char)); } if (operstate != -1) { rta = (struct rtattr *) ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)); rta->rta_type = IFLA_OPERSTATE; rta->rta_len = RTA_LENGTH(sizeof(char)); *((char *) RTA_DATA(rta)) = operstate; req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) + RTA_LENGTH(sizeof(char)); } wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d", linkmode, operstate); ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0); if (ret < 0) { wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: " "%s (assume operstate is not supported)", strerror(errno)); } return ret < 0 ? -1 : 0; } static int wpa_driver_nl80211_set_auth_param( struct wpa_driver_nl80211_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; } static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid) { struct wpa_driver_nl80211_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) { perror("ioctl[SIOCGIWAP]"); ret = -1; } os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN); return ret; } static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid) { struct wpa_driver_nl80211_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) { perror("ioctl[SIOCSIWAP]"); ret = -1; } return ret; } static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid) { struct wpa_driver_nl80211_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 = 32; if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) { perror("ioctl[SIOCGIWESSID]"); ret = -1; } else { ret = iwr.u.essid.length; if (ret > 32) ret = 32; /* 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; } static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid, size_t ssid_len) { struct wpa_driver_nl80211_data *drv = priv; struct iwreq iwr; int ret = 0; char buf[33]; if (ssid_len > 32) 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) { perror("ioctl[SIOCSIWESSID]"); ret = -1; } return ret; } static int wpa_driver_nl80211_set_freq(void *priv, int freq) { struct wpa_driver_nl80211_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) { perror("ioctl[SIOCSIWFREQ]"); ret = -1; } return ret; } static void wpa_driver_nl80211_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; spos = custom + 17; bytes = strspn(spos, "0123456789abcdefABCDEF"); if (!bytes || (bytes & 1)) return; bytes /= 2; data.assoc_info.req_ies = os_malloc(bytes); if (data.assoc_info.req_ies == NULL) return; data.assoc_info.req_ies_len = bytes; hexstr2bin(spos, data.assoc_info.req_ies, 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; data.assoc_info.resp_ies = os_malloc(bytes); if (data.assoc_info.resp_ies == NULL) goto done; data.assoc_info.resp_ies_len = bytes; hexstr2bin(spos, data.assoc_info.resp_ies, bytes); } wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data); done: os_free(data.assoc_info.resp_ies); os_free(data.assoc_info.req_ies); #ifdef CONFIG_PEERKEY } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) { if (hwaddr_aton(custom + 17, data.stkstart.peer)) { wpa_printf(MSG_DEBUG, "WEXT: unrecognized " "STKSTART.request '%s'", custom + 17); return; } wpa_supplicant_event(ctx, EVENT_STKSTART, &data); #endif /* CONFIG_PEERKEY */ } } static int wpa_driver_nl80211_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_nl80211_event_wireless_pmkidcand( struct wpa_driver_nl80211_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_nl80211_event_wireless_assocreqie( struct wpa_driver_nl80211_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_malloc(len); if (drv->assoc_req_ies == NULL) { drv->assoc_req_ies_len = 0; return -1; } os_memcpy(drv->assoc_req_ies, ev, len); drv->assoc_req_ies_len = len; return 0; } static int wpa_driver_nl80211_event_wireless_assocrespie( struct wpa_driver_nl80211_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_malloc(len); if (drv->assoc_resp_ies == NULL) { drv->assoc_resp_ies_len = 0; return -1; } os_memcpy(drv->assoc_resp_ies, ev, len); drv->assoc_resp_ies_len = len; return 0; } static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_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; drv->assoc_req_ies = NULL; 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; drv->assoc_resp_ies = NULL; data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len; } wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data); os_free(data.assoc_info.req_ies); os_free(data.assoc_info.resp_ies); } static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv, void *ctx, char *data, int len) { struct iw_event iwe_buf, *iwe = &iwe_buf; char *pos, *end, *custom, *buf; pos = data; end = data + len; while (pos + IW_EV_LCP_LEN <= end) { /* 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) 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(ctx, EVENT_DISASSOC, NULL); } else { wpa_driver_nl80211_event_assoc_ies(drv); wpa_supplicant_event(ctx, EVENT_ASSOC, NULL); } break; case IWEVMICHAELMICFAILURE: wpa_driver_nl80211_event_wireless_michaelmicfailure( ctx, custom, iwe->u.data.length); break; case IWEVCUSTOM: if (custom + iwe->u.data.length > end) return; buf = os_malloc(iwe->u.data.length + 1); if (buf == NULL) return; os_memcpy(buf, custom, iwe->u.data.length); buf[iwe->u.data.length] = '\0'; wpa_driver_nl80211_event_wireless_custom(ctx, buf); os_free(buf); break; case IWEVASSOCREQIE: wpa_driver_nl80211_event_wireless_assocreqie( drv, custom, iwe->u.data.length); break; case IWEVASSOCRESPIE: wpa_driver_nl80211_event_wireless_assocrespie( drv, custom, iwe->u.data.length); break; case IWEVPMKIDCAND: wpa_driver_nl80211_event_wireless_pmkidcand( drv, custom, iwe->u.data.length); break; } pos += iwe->len; } } static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv, void *ctx, 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) drv->if_removed = 1; else drv->if_removed = 0; } wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event); } static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv, struct nlmsghdr *h) { struct ifinfomsg *ifi; int attrlen, _nlmsg_len, rta_len; struct rtattr *attr; ifi = NLMSG_DATA(h); _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg)); attrlen = h->nlmsg_len - _nlmsg_len; if (attrlen < 0) return 0; attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len); 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_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv, int ifindex, struct nlmsghdr *h) { if (drv->ifindex == ifindex) return 1; if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) { drv->ifindex = if_nametoindex(drv->ifname); wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed " "interface"); wpa_driver_nl80211_finish_drv_init(drv); return 1; } return 0; } static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv, void *ctx, struct nlmsghdr *h, size_t len) { struct ifinfomsg *ifi; int attrlen, _nlmsg_len, rta_len; struct rtattr * attr; if (len < sizeof(*ifi)) return; ifi = NLMSG_DATA(h); if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) { 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]" : ""); /* * Some drivers send the association event before the operup event--in * this case, lifting operstate in wpa_driver_nl80211_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)) wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP); _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg)); attrlen = h->nlmsg_len - _nlmsg_len; if (attrlen < 0) return; attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len); rta_len = RTA_ALIGN(sizeof(struct rtattr)); while (RTA_OK(attr, attrlen)) { if (attr->rta_type == IFLA_WIRELESS) { wpa_driver_nl80211_event_wireless( drv, ctx, ((char *) attr) + rta_len, attr->rta_len - rta_len); } else if (attr->rta_type == IFLA_IFNAME) { wpa_driver_nl80211_event_link( drv, ctx, ((char *) attr) + rta_len, attr->rta_len - rta_len, 0); } attr = RTA_NEXT(attr, attrlen); } } static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv, void *ctx, struct nlmsghdr *h, size_t len) { struct ifinfomsg *ifi; int attrlen, _nlmsg_len, rta_len; struct rtattr * attr; if (len < sizeof(*ifi)) return; ifi = NLMSG_DATA(h); _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg)); attrlen = h->nlmsg_len - _nlmsg_len; if (attrlen < 0) return; attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len); rta_len = RTA_ALIGN(sizeof(struct rtattr)); while (RTA_OK(attr, attrlen)) { if (attr->rta_type == IFLA_IFNAME) { wpa_driver_nl80211_event_link( drv, ctx, ((char *) attr) + rta_len, attr->rta_len - rta_len, 1); } attr = RTA_NEXT(attr, attrlen); } } static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx, void *sock_ctx) { char buf[8192]; int left; struct sockaddr_nl from; socklen_t fromlen; struct nlmsghdr *h; int max_events = 10; try_again: fromlen = sizeof(from); left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT, (struct sockaddr *) &from, &fromlen); if (left < 0) { if (errno != EINTR && errno != EAGAIN) perror("recvfrom(netlink)"); return; } h = (struct nlmsghdr *) buf; while (left >= (int) sizeof(*h)) { int len, plen; len = h->nlmsg_len; plen = len - sizeof(*h); if (len > left || plen < 0) { wpa_printf(MSG_DEBUG, "Malformed netlink message: " "len=%d left=%d plen=%d", len, left, plen); break; } switch (h->nlmsg_type) { case RTM_NEWLINK: wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx, h, plen); break; case RTM_DELLINK: wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx, h, plen); break; } len = NLMSG_ALIGN(len); left -= len; h = (struct nlmsghdr *) ((char *) h + len); } if (left > 0) { wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink " "message", left); } if (--max_events > 0) { /* * Try to receive all events in one eloop call in order to * limit race condition on cases where AssocInfo event, Assoc * event, and EAPOL frames are received more or less at the * same time. We want to process the event messages first * before starting EAPOL processing. */ goto try_again; } } static int no_seq_check(struct nl_msg *msg, void *arg) { return NL_OK; } static int process_event(struct nl_msg *msg, void *arg) { struct wpa_driver_nl80211_data *drv = arg; struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); struct nlattr *tb[NL80211_ATTR_MAX + 1]; nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL); if (tb[NL80211_ATTR_IFINDEX]) { int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]); if (ifindex != drv->ifindex) { wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)" " for foreign interface (ifindex %d)", gnlh->cmd, ifindex); return NL_SKIP; } } switch (gnlh->cmd) { case NL80211_CMD_TRIGGER_SCAN: wpa_printf(MSG_DEBUG, "nl80211: Scan trigger"); break; case NL80211_CMD_NEW_SCAN_RESULTS: wpa_printf(MSG_DEBUG, "nl80211: New scan results available"); drv->scan_complete_events = 1; eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx); wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL); break; case NL80211_CMD_SCAN_ABORTED: wpa_printf(MSG_DEBUG, "nl80211: Scan aborted"); /* * Need to indicate that scan results are available in order * not to make wpa_supplicant stop its scanning. */ eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx); wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL); break; default: wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)", gnlh->cmd); break; } return NL_SKIP; } static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx, void *sock_ctx) { struct nl_cb *cb; struct wpa_driver_nl80211_data *drv = eloop_ctx; wpa_printf(MSG_DEBUG, "nl80211: Event message available"); cb = nl_cb_clone(drv->nl_cb); if (!cb) return; nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL); nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv); nl_recvmsgs(drv->nl_handle, cb); nl_cb_put(cb); } static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv, const char *ifname, int *flags) { struct ifreq ifr; os_memset(&ifr, 0, sizeof(ifr)); os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { perror("ioctl[SIOCGIFFLAGS]"); return -1; } *flags = ifr.ifr_flags & 0xffff; return 0; } /** * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS) * @drv: driver_nl80211 private data * @flags: Pointer to returned flags value * Returns: 0 on success, -1 on failure */ static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv, int *flags) { return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags); } static int wpa_driver_nl80211_set_ifflags_ifname( struct wpa_driver_nl80211_data *drv, const char *ifname, int flags) { struct ifreq ifr; os_memset(&ifr, 0, sizeof(ifr)); os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ); ifr.ifr_flags = flags & 0xffff; if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { perror("SIOCSIFFLAGS"); return -1; } return 0; } /** * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS) * @drv: driver_nl80211 private data * @flags: New value for flags * Returns: 0 on success, -1 on failure */ static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv, int flags) { return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags); } /** * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain * @priv: driver_nl80211 private data * @alpha2_arg: country to which to switch to * Returns: 0 on success, -1 on failure * * This asks nl80211 to set the regulatory domain for given * country ISO / IEC alpha2. */ static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg) { struct wpa_driver_nl80211_data *drv = priv; char alpha2[3]; struct nl_msg *msg; msg = nlmsg_alloc(); if (!msg) goto nla_put_failure; alpha2[0] = alpha2_arg[0]; alpha2[1] = alpha2_arg[1]; alpha2[2] = '\0'; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_REQ_SET_REG, 0); NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2); if (send_and_recv_msgs(drv, msg, NULL, NULL)) return -EINVAL; return 0; nla_put_failure: return -EINVAL; } static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies, size_t ies_len) { struct wpa_driver_nl80211_data *drv = priv; struct nl_msg *msg; int ret = -1; msg = nlmsg_alloc(); if (!msg) return -ENOMEM; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_SET_MGMT_EXTRA_IE, 0); NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */); if (ies) NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies); ret = 0; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); ret = send_and_recv_msgs(drv, msg, NULL, NULL); return ret; nla_put_failure: return -ENOBUFS; } #ifdef CONFIG_CLIENT_MLME static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv, int drop_unencrypted, int userspace_mlme) { #ifdef NL80211_CMD_SET_VIF struct nl_msg *msg; int ret = -1; msg = nlmsg_alloc(); if (!msg) return -ENOMEM; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_SET_VIF, 0); if (drop_unencrypted >= 0) NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED, drop_unencrypted); if (userspace_mlme >= 0) NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME, userspace_mlme); ret = 0; NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); ret = send_and_recv_msgs(drv, msg, NULL, NULL); return ret; nla_put_failure: return -ENOBUFS; #else /* NL80211_CMD_SET_VIF */ return -1; #endif /* NL80211_CMD_SET_VIF */ } static int wpa_driver_nl80211_set_userspace_mlme( struct wpa_driver_nl80211_data *drv, int enabled) { return nl80211_set_vif(drv, -1, enabled); } static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx) { struct nl_msg *msg; msg = nlmsg_alloc(); if (!msg) goto nla_put_failure; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_DEL_INTERFACE, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx); if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0) return; nla_put_failure: wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface."); } static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv, const char *ifname, enum nl80211_iftype iftype) { struct nl_msg *msg, *flags = NULL; int ifidx, err; int ret = -ENOBUFS; msg = nlmsg_alloc(); if (!msg) return -1; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_NEW_INTERFACE, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname)); NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname); NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype); if (iftype == NL80211_IFTYPE_MONITOR) { flags = nlmsg_alloc(); if (!flags) goto nla_put_failure; NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES); err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags); nlmsg_free(flags); if (err) goto nla_put_failure; } ret = send_and_recv_msgs(drv, msg, NULL, NULL); if (ret) { nla_put_failure: wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d", ret); return ret; } ifidx = if_nametoindex(ifname); if (ifidx <= 0) return -1; return ifidx; } static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx) { struct wpa_driver_nl80211_data *drv = eloop_ctx; int len; unsigned char buf[3000]; struct ieee80211_radiotap_iterator iter; int ret; int injected = 0, failed = 0, rxflags = 0; struct ieee80211_rx_status rx_status; len = recv(sock, buf, sizeof(buf), 0); if (len < 0) { perror("recv"); return; } if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) { wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap " "frame"); return; } os_memset(&rx_status, 0, sizeof(rx_status)); while (1) { ret = ieee80211_radiotap_iterator_next(&iter); if (ret == -ENOENT) break; if (ret) { wpa_printf(MSG_DEBUG, "nl80211: received invalid " "radiotap frame (%d)", ret); return; } switch (iter.this_arg_index) { case IEEE80211_RADIOTAP_FLAGS: if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS) len -= 4; break; case IEEE80211_RADIOTAP_RX_FLAGS: rxflags = 1; break; case IEEE80211_RADIOTAP_TX_FLAGS: injected = 1; failed = le_to_host16((*(u16 *) iter.this_arg)) & IEEE80211_RADIOTAP_F_TX_FAIL; break; case IEEE80211_RADIOTAP_DATA_RETRIES: break; case IEEE80211_RADIOTAP_CHANNEL: /* TODO convert from freq/flags to channel number * rx_status.channel = XXX; */ break; case IEEE80211_RADIOTAP_RATE: break; case IEEE80211_RADIOTAP_DB_ANTSIGNAL: rx_status.ssi = *iter.this_arg; break; } } if (rxflags && injected) return; if (!injected) { wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length, len - iter.max_length, &rx_status); } else if (failed) { /* TX failure callback */ } else { /* TX success (ACK) callback */ } } static int wpa_driver_nl80211_create_monitor_interface( struct wpa_driver_nl80211_data *drv) { char buf[IFNAMSIZ]; struct sockaddr_ll ll; int optval, flags; socklen_t optlen; os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname); buf[IFNAMSIZ - 1] = '\0'; drv->monitor_ifidx = nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR); if (drv->monitor_ifidx < 0) return -1; if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 || wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) != 0) { wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' " "UP", buf); goto error; } os_memset(&ll, 0, sizeof(ll)); ll.sll_family = AF_PACKET; ll.sll_ifindex = drv->monitor_ifidx; drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if (drv->monitor_sock < 0) { perror("socket[PF_PACKET,SOCK_RAW]"); goto error; } if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) { perror("monitor socket bind"); goto error; } optlen = sizeof(optval); optval = 20; if (setsockopt (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) { perror("Failed to set socket priority"); goto error; } if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read, drv, NULL)) { wpa_printf(MSG_ERROR, "nl80211: Could not register monitor " "read socket"); goto error; } return 0; error: nl80211_remove_iface(drv, drv->monitor_ifidx); return -1; } #endif /* CONFIG_CLIENT_MLME */ /** * wpa_driver_nl80211_init - Initialize nl80211 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 */ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname) { int s, ret; struct sockaddr_nl local; struct wpa_driver_nl80211_data *drv; drv = os_zalloc(sizeof(*drv)); if (drv == NULL) return NULL; drv->ctx = ctx; os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)); drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT); if (drv->nl_cb == NULL) { wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink " "callbacks"); goto err1; } drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb); if (drv->nl_handle == NULL) { wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink " "callbacks"); goto err2; } if (genl_connect(drv->nl_handle)) { wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic " "netlink"); goto err3; } drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle); if (drv->nl_cache == NULL) { wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic " "netlink cache"); goto err3; } drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211"); if (drv->nl80211 == NULL) { wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not " "found"); goto err4; } ret = nl_get_multicast_id(drv, "nl80211", "scan"); if (ret >= 0) ret = nl_socket_add_membership(drv->nl_handle, ret); if (ret < 0) { wpa_printf(MSG_ERROR, "nl80211: Could not add multicast " "membership for scan events: %d (%s)", ret, strerror(-ret)); goto err4; } eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle), wpa_driver_nl80211_event_receive, drv, ctx); drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0); if (drv->ioctl_sock < 0) { perror("socket(PF_INET,SOCK_DGRAM)"); goto err5; } s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (s < 0) { perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)"); goto err6; } os_memset(&local, 0, sizeof(local)); local.nl_family = AF_NETLINK; local.nl_groups = RTMGRP_LINK; if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) { perror("bind(netlink)"); close(s); goto err6; } eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv, ctx); drv->wext_event_sock = s; wpa_driver_nl80211_finish_drv_init(drv); return drv; err6: close(drv->ioctl_sock); err5: genl_family_put(drv->nl80211); err4: nl_cache_free(drv->nl_cache); err3: nl_handle_destroy(drv->nl_handle); err2: nl_cb_put(drv->nl_cb); err1: os_free(drv); return NULL; } static void wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv) { int flags; drv->ifindex = if_nametoindex(drv->ifname); if (wpa_driver_nl80211_set_mode(drv, 0) < 0) { printf("Could not configure driver to use managed mode\n"); } if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) printf("Could not get interface '%s' flags\n", drv->ifname); else if (!(flags & IFF_UP)) { if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) { printf("Could not set interface '%s' UP\n", drv->ifname); } } /* * Make sure that the driver does not have any obsolete PMKID entries. */ wpa_driver_nl80211_flush_pmkid(drv); wpa_driver_nl80211_get_range(drv); wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT); } /** * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init() * * Shut down driver interface and processing of driver events. Free * private data buffer if one was allocated in wpa_driver_nl80211_init(). */ static void wpa_driver_nl80211_deinit(void *priv) { struct wpa_driver_nl80211_data *drv = priv; int flags; #ifdef CONFIG_CLIENT_MLME if (drv->monitor_sock >= 0) { eloop_unregister_read_sock(drv->monitor_sock); close(drv->monitor_sock); } if (drv->monitor_ifidx > 0) nl80211_remove_iface(drv, drv->monitor_ifidx); if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) wpa_driver_nl80211_set_userspace_mlme(drv, 0); #endif /* CONFIG_CLIENT_MLME */ eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx); /* * Clear possibly configured driver parameters in order to make it * easier to use the driver after wpa_supplicant has been terminated. */ (void) wpa_driver_nl80211_set_bssid(drv, (u8 *) "\x00\x00\x00\x00\x00\x00"); wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP); eloop_unregister_read_sock(drv->wext_event_sock); if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP); close(drv->wext_event_sock); close(drv->ioctl_sock); os_free(drv->assoc_req_ies); os_free(drv->assoc_resp_ies); eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle)); genl_family_put(drv->nl80211); nl_cache_free(drv->nl_cache); nl_handle_destroy(drv->nl_handle); nl_cb_put(drv->nl_cb); os_free(drv); } /** * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion * @eloop_ctx: Unused * @timeout_ctx: ctx argument given to wpa_driver_nl80211_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. */ static void wpa_driver_nl80211_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_nl80211_scan - Request the driver to initiate scan * @priv: Pointer to private wext data from wpa_driver_nl80211_init() * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for * all SSIDs (either active scan with broadcast SSID or passive * scan * @ssid_len: Length of the SSID * Returns: 0 on success, -1 on failure */ static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len) { struct wpa_driver_nl80211_data *drv = priv; int ret = 0, timeout; struct nl_msg *msg, *ssids; msg = nlmsg_alloc(); ssids = nlmsg_alloc(); if (!msg || !ssids) { nlmsg_free(msg); nlmsg_free(ssids); return -1; } genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_TRIGGER_SCAN, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); if (ssid && ssid_len) { /* Request an active scan for a specific SSID */ NLA_PUT(ssids, 1, ssid_len, ssid); } else { /* Request an active scan for wildcard SSID */ NLA_PUT(ssids, 1, 0, ""); } nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids); ret = send_and_recv_msgs(drv, msg, NULL, NULL); msg = NULL; if (ret) { wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d " "(%s)", ret, strerror(-ret)); goto nla_put_failure; } /* 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_nl80211_scan_timeout, drv, drv->ctx); eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout, drv, drv->ctx); nla_put_failure: nlmsg_free(ssids); nlmsg_free(msg); return ret; } static int bss_info_handler(struct nl_msg *msg, void *arg) { struct nlattr *tb[NL80211_ATTR_MAX + 1]; struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); struct nlattr *bss[NL80211_BSS_MAX + 1]; static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC }, [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, [NL80211_BSS_TSF] = { .type = NLA_U64 }, [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC }, [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, }; struct wpa_scan_results *res = arg; struct wpa_scan_res **tmp; struct wpa_scan_res *r; const u8 *ie; size_t ie_len; nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL); if (!tb[NL80211_ATTR_BSS]) return NL_SKIP; if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy)) return NL_SKIP; if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) { ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); } else { ie = NULL; ie_len = 0; } r = os_zalloc(sizeof(*r) + ie_len); if (r == NULL) return NL_SKIP; if (bss[NL80211_BSS_BSSID]) os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN); if (bss[NL80211_BSS_FREQUENCY]) r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]); if (bss[NL80211_BSS_BEACON_INTERVAL]) r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]); if (bss[NL80211_BSS_CAPABILITY]) r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); if (bss[NL80211_BSS_SIGNAL_UNSPEC]) r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]); if (bss[NL80211_BSS_SIGNAL_MBM]) r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]); if (bss[NL80211_BSS_TSF]) r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]); r->ie_len = ie_len; if (ie) os_memcpy(r + 1, ie, ie_len); tmp = os_realloc(res->res, (res->num + 1) * sizeof(struct wpa_scan_res *)); if (tmp == NULL) { os_free(r); return NL_SKIP; } tmp[res->num++] = r; res->res = tmp; return NL_SKIP; } /** * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results * @priv: Pointer to private wext data from wpa_driver_nl80211_init() * Returns: Scan results on success, -1 on failure */ static struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv) { struct wpa_driver_nl80211_data *drv = priv; struct nl_msg *msg; struct wpa_scan_results *res; int ret; res = os_zalloc(sizeof(*res)); if (res == NULL) return 0; msg = nlmsg_alloc(); if (!msg) goto nla_put_failure; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP, NL80211_CMD_GET_SCAN, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); ret = send_and_recv_msgs(drv, msg, bss_info_handler, res); msg = NULL; if (ret == 0) { wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)", (unsigned long) res->num); return res; } wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d " "(%s)", ret, strerror(-ret)); nla_put_failure: nlmsg_free(msg); wpa_scan_results_free(res); return NULL; } static int wpa_driver_nl80211_get_range(void *priv) { struct wpa_driver_nl80211_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) { perror("ioctl[SIOCGIWRANGE]"); 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; 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; drv->capa.auth = WPA_DRIVER_AUTH_OPEN | WPA_DRIVER_AUTH_SHARED | WPA_DRIVER_AUTH_LEAP; wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x", drv->capa.key_mgmt, drv->capa.enc); } else { wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - " "assuming WPA is not supported"); } os_free(range); return 0; } static int wpa_driver_nl80211_set_wpa(void *priv, int enabled) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED, enabled); } static int wpa_driver_nl80211_set_key(void *priv, 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_nl80211_data *drv = priv; int err; struct nl_msg *msg; wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d " "seq_len=%lu key_len=%lu", __func__, alg, addr, key_idx, set_tx, (unsigned long) seq_len, (unsigned long) key_len); msg = nlmsg_alloc(); if (msg == NULL) return -1; if (alg == WPA_ALG_NONE) { genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_DEL_KEY, 0); } else { genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_NEW_KEY, 0); NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key); switch (alg) { case WPA_ALG_WEP: if (key_len == 5) NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC01); else NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC05); break; case WPA_ALG_TKIP: NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02); break; case WPA_ALG_CCMP: NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04); break; #ifdef CONFIG_IEEE80211W case WPA_ALG_IGTK: NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06); break; #endif /* CONFIG_IEEE80211W */ default: nlmsg_free(msg); return -1; } } if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr)); NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); } NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); err = send_and_recv_msgs(drv, msg, NULL, NULL); if (err) { wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err); return -1; } if (set_tx && alg != WPA_ALG_NONE) { msg = nlmsg_alloc(); if (msg == NULL) return -1; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_SET_KEY, 0); NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT); err = send_and_recv_msgs(drv, msg, NULL, NULL); if (err) { wpa_printf(MSG_DEBUG, "nl80211: set default key " "failed; err=%d", err); return -1; } } return 0; nla_put_failure: return -ENOBUFS; } static int wpa_driver_nl80211_set_countermeasures(void *priv, int enabled) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_TKIP_COUNTERMEASURES, enabled); } static int wpa_driver_nl80211_set_drop_unencrypted(void *priv, int enabled) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); drv->use_crypt = enabled; return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, enabled); } static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_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) { perror("ioctl[SIOCSIWMLME]"); ret = -1; } return ret; } static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr, int reason_code) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code); } static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr, int reason_code) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC, reason_code); } static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie, size_t ie_len) { struct wpa_driver_nl80211_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) { perror("ioctl[SIOCSIWGENIE]"); ret = -1; } return ret; } static int wpa_driver_nl80211_cipher2wext(int cipher) { switch (cipher) { case CIPHER_NONE: return IW_AUTH_CIPHER_NONE; case CIPHER_WEP40: return IW_AUTH_CIPHER_WEP40; case CIPHER_TKIP: return IW_AUTH_CIPHER_TKIP; case CIPHER_CCMP: return IW_AUTH_CIPHER_CCMP; case CIPHER_WEP104: return IW_AUTH_CIPHER_WEP104; default: return 0; } } static int wpa_driver_nl80211_keymgmt2wext(int keymgmt) { switch (keymgmt) { case KEY_MGMT_802_1X: case KEY_MGMT_802_1X_NO_WPA: return IW_AUTH_KEY_MGMT_802_1X; case KEY_MGMT_PSK: return IW_AUTH_KEY_MGMT_PSK; default: return 0; } } static int wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_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 & AUTH_ALG_OPEN_SYSTEM) iwr.u.encoding.flags |= IW_ENCODE_OPEN; if (params->auth_alg & AUTH_ALG_SHARED_KEY) iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED; } if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) { perror("ioctl[SIOCSIWENCODE]"); ret = -1; } return ret; } static int wpa_driver_nl80211_associate( void *priv, struct wpa_driver_associate_params *params) { struct wpa_driver_nl80211_data *drv = priv; int ret = 0; int allow_unencrypted_eapol; int value; wpa_printf(MSG_DEBUG, "%s", __FUNCTION__); /* * If the driver did not support SIOCSIWAUTH, fallback to * SIOCSIWENCODE here. */ if (drv->auth_alg_fallback && wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0) ret = -1; if (!params->bssid && wpa_driver_nl80211_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_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0) ret = -1; if (params->wpa_ie == NULL || params->wpa_ie_len == 0) value = IW_AUTH_WPA_VERSION_DISABLED; else if (params->wpa_ie[0] == WLAN_EID_RSN) value = IW_AUTH_WPA_VERSION_WPA2; else value = IW_AUTH_WPA_VERSION_WPA; if (wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_VERSION, value) < 0) ret = -1; value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite); if (wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_CIPHER_PAIRWISE, value) < 0) ret = -1; value = wpa_driver_nl80211_cipher2wext(params->group_suite); if (wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_CIPHER_GROUP, value) < 0) ret = -1; value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite); if (wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_KEY_MGMT, value) < 0) ret = -1; value = params->key_mgmt_suite != KEY_MGMT_NONE || params->pairwise_suite != CIPHER_NONE || params->group_suite != CIPHER_NONE || params->wpa_ie_len; if (wpa_driver_nl80211_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 == KEY_MGMT_802_1X || params->key_mgmt_suite == KEY_MGMT_PSK) allow_unencrypted_eapol = 0; else allow_unencrypted_eapol = 1; if (wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_RX_UNENCRYPTED_EAPOL, allow_unencrypted_eapol) < 0) ret = -1; if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0) ret = -1; if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0) ret = -1; if (params->bssid && wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0) ret = -1; return ret; } static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg) { struct wpa_driver_nl80211_data *drv = priv; int algs = 0, res; if (auth_alg & AUTH_ALG_OPEN_SYSTEM) algs |= IW_AUTH_ALG_OPEN_SYSTEM; if (auth_alg & AUTH_ALG_SHARED_KEY) algs |= IW_AUTH_ALG_SHARED_KEY; if (auth_alg & 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_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG, algs); drv->auth_alg_fallback = res == -2; return res; } /** * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE * @priv: Pointer to private wext data from wpa_driver_nl80211_init() * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS * Returns: 0 on success, -1 on failure */ static int wpa_driver_nl80211_set_mode(void *priv, int mode) { struct wpa_driver_nl80211_data *drv = priv; int ret = -1, flags; struct nl_msg *msg; msg = nlmsg_alloc(); if (!msg) return -1; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_SET_INTERFACE, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION); ret = send_and_recv_msgs(drv, msg, NULL, NULL); if (!ret) return 0; else goto try_again; nla_put_failure: wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)", ret, strerror(-ret)); return -1; try_again: /* mac80211 doesn't allow mode changes while the device is up, so * take the device down, try to set the mode again, and bring the * device back up. */ if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) { (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP); /* Try to set the mode again while the interface is down */ msg = nlmsg_alloc(); if (!msg) return -1; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_SET_INTERFACE, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION); ret = send_and_recv_msgs(drv, msg, NULL, NULL); if (ret) { wpa_printf(MSG_ERROR, "Failed to set interface %s " "mode(try_again): %d (%s)", drv->ifname, ret, strerror(-ret)); } /* Ignore return value of get_ifflags to ensure that the device * is always up like it was before this function was called. */ (void) wpa_driver_nl80211_get_ifflags(drv, &flags); (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP); } return ret; } static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_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) perror("ioctl[SIOCSIWPMKSA]"); ret = -1; } return ret; } static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid, const u8 *pmkid) { struct wpa_driver_nl80211_data *drv = priv; return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid); } static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid, const u8 *pmkid) { struct wpa_driver_nl80211_data *drv = priv; return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid); } static int wpa_driver_nl80211_flush_pmkid(void *priv) { struct wpa_driver_nl80211_data *drv = priv; return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL); } static int wpa_driver_nl80211_get_capa(void *priv, struct wpa_driver_capa *capa) { struct wpa_driver_nl80211_data *drv = priv; if (!drv->has_capability) return -1; os_memcpy(capa, &drv->capa, sizeof(*capa)); return 0; } static int wpa_driver_nl80211_set_operstate(void *priv, int state) { struct wpa_driver_nl80211_data *drv = priv; wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)", __func__, drv->operstate, state, state ? "UP" : "DORMANT"); drv->operstate = state; return wpa_driver_nl80211_send_oper_ifla( drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT); } #ifdef CONFIG_CLIENT_MLME static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv) { if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) { wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace " "MLME"); return -1; } if (wpa_driver_nl80211_create_monitor_interface(drv)) { wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor " "interface"); return -1; } return 0; } #endif /* CONFIG_CLIENT_MLME */ static int wpa_driver_nl80211_set_param(void *priv, const char *param) { #ifdef CONFIG_CLIENT_MLME struct wpa_driver_nl80211_data *drv = priv; if (param == NULL) return 0; wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param); if (os_strstr(param, "use_mlme=1")) { wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME"); drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME; if (wpa_driver_nl80211_open_mlme(drv)) return -1; } #endif /* CONFIG_CLIENT_MLME */ return 0; } #ifdef CONFIG_CLIENT_MLME struct phy_info_arg { u16 *num_modes; struct wpa_hw_modes *modes; }; static int phy_info_handler(struct nl_msg *msg, void *arg) { struct nlattr *tb_msg[NL80211_ATTR_MAX + 1]; struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); struct phy_info_arg *phy_info = arg; struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1]; struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1]; static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = { [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 }, [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG }, [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG }, [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG }, [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG }, }; struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1]; static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = { [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 }, [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG }, }; struct nlattr *nl_band; struct nlattr *nl_freq; struct nlattr *nl_rate; int rem_band, rem_freq, rem_rate; struct wpa_hw_modes *mode; int idx, mode_is_set; nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL); if (!tb_msg[NL80211_ATTR_WIPHY_BANDS]) return NL_SKIP; nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) { mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode)); if (!mode) return NL_SKIP; phy_info->modes = mode; mode_is_set = 0; mode = &phy_info->modes[*(phy_info->num_modes)]; os_memset(mode, 0, sizeof(*mode)); *(phy_info->num_modes) += 1; nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band), nla_len(nl_band), NULL); nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) { nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq), nla_len(nl_freq), freq_policy); if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ]) continue; mode->num_channels++; } mode->channels = os_zalloc(mode->num_channels * sizeof(struct wpa_channel_data)); if (!mode->channels) return NL_SKIP; idx = 0; nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) { nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq), nla_len(nl_freq), freq_policy); if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ]) continue; mode->channels[idx].freq = nla_get_u32( tb_freq[NL80211_FREQUENCY_ATTR_FREQ]); mode->channels[idx].flag |= WPA_CHAN_W_SCAN | WPA_CHAN_W_ACTIVE_SCAN | WPA_CHAN_W_IBSS; if (!mode_is_set) { /* crude heuristic */ if (mode->channels[idx].freq < 4000) mode->mode = WPA_MODE_IEEE80211B; else mode->mode = WPA_MODE_IEEE80211A; mode_is_set = 1; } /* crude heuristic */ if (mode->channels[idx].freq < 4000) { if (mode->channels[idx].freq == 2484) mode->channels[idx].chan = 14; else mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5; } else mode->channels[idx].chan = mode->channels[idx].freq / 5 - 1000; if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED]) mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN; if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN]) mode->channels[idx].flag &= ~WPA_CHAN_W_ACTIVE_SCAN; if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS]) mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS; idx++; } nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) { nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate), nla_len(nl_rate), rate_policy); if (!tb_rate[NL80211_BITRATE_ATTR_RATE]) continue; mode->num_rates++; } mode->rates = os_zalloc(mode->num_rates * sizeof(struct wpa_rate_data)); if (!mode->rates) return NL_SKIP; idx = 0; nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) { nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate), nla_len(nl_rate), rate_policy); if (!tb_rate[NL80211_BITRATE_ATTR_RATE]) continue; mode->rates[idx].rate = nla_get_u32( tb_rate[NL80211_BITRATE_ATTR_RATE]); /* crude heuristic */ if (mode->mode == WPA_MODE_IEEE80211B && mode->rates[idx].rate > 200) mode->mode = WPA_MODE_IEEE80211G; if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE]) mode->rates[idx].flags |= WPA_RATE_PREAMBLE2; idx++; } } return NL_SKIP; } static struct wpa_hw_modes * wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags) { struct wpa_driver_nl80211_data *drv = priv; struct nl_msg *msg; struct phy_info_arg result = { .num_modes = num_modes, .modes = NULL, }; *num_modes = 0; *flags = 0; msg = nlmsg_alloc(); if (!msg) return NULL; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_GET_WIPHY, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) return result.modes; nla_put_failure: return NULL; } static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode, int chan, int freq) { return wpa_driver_nl80211_set_freq(priv, freq); } static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data, size_t data_len) { struct wpa_driver_nl80211_data *drv = priv; __u8 rtap_hdr[] = { 0x00, 0x00, /* radiotap version */ 0x0e, 0x00, /* radiotap length */ 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */ 0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */ 0x00, /* padding */ 0x00, 0x00, /* RX and TX flags to indicate that */ 0x00, 0x00, /* this is the injected frame directly */ }; struct iovec iov[2] = { { .iov_base = &rtap_hdr, .iov_len = sizeof(rtap_hdr), }, { .iov_base = (void *) data, .iov_len = data_len, } }; struct msghdr msg = { .msg_name = NULL, .msg_namelen = 0, .msg_iov = iov, .msg_iovlen = 2, .msg_control = NULL, .msg_controllen = 0, .msg_flags = 0, }; if (sendmsg(drv->monitor_sock, &msg, 0) < 0) { perror("send[MLME]"); return -1; } return 0; } static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr, const u8 *supp_rates, size_t supp_rates_len) { struct wpa_driver_nl80211_data *drv = priv; struct nl_msg *msg; int ret = -1; msg = nlmsg_alloc(); if (!msg) return -ENOMEM; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_NEW_STATION, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); /* TODO: Get proper Association ID and listen interval */ NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1); NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len, supp_rates); NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1); ret = send_and_recv_msgs(drv, msg, NULL, NULL); /* ignore EEXIST, this happens if a STA associates while associated */ if (ret == -EEXIST || ret >= 0) ret = 0; nla_put_failure: return ret; } static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr) { struct wpa_driver_nl80211_data *drv = priv; struct nl_msg *msg; int ret = -1; msg = nlmsg_alloc(); if (!msg) return -ENOMEM; genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, NL80211_CMD_DEL_STATION, 0); NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex); NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); ret = 0; ret = send_and_recv_msgs(drv, msg, NULL, NULL); return ret; nla_put_failure: return -ENOBUFS; } #endif /* CONFIG_CLIENT_MLME */ const struct wpa_driver_ops wpa_driver_nl80211_ops = { .name = "nl80211", .desc = "Linux nl80211/cfg80211", .get_bssid = wpa_driver_nl80211_get_bssid, .get_ssid = wpa_driver_nl80211_get_ssid, .set_wpa = wpa_driver_nl80211_set_wpa, .set_key = wpa_driver_nl80211_set_key, .set_countermeasures = wpa_driver_nl80211_set_countermeasures, .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted, .scan = wpa_driver_nl80211_scan, .get_scan_results2 = wpa_driver_nl80211_get_scan_results, .deauthenticate = wpa_driver_nl80211_deauthenticate, .disassociate = wpa_driver_nl80211_disassociate, .set_mode = wpa_driver_nl80211_set_mode, .associate = wpa_driver_nl80211_associate, .set_auth_alg = wpa_driver_nl80211_set_auth_alg, .init = wpa_driver_nl80211_init, .deinit = wpa_driver_nl80211_deinit, .set_param = wpa_driver_nl80211_set_param, .add_pmkid = wpa_driver_nl80211_add_pmkid, .remove_pmkid = wpa_driver_nl80211_remove_pmkid, .flush_pmkid = wpa_driver_nl80211_flush_pmkid, .get_capa = wpa_driver_nl80211_get_capa, .set_operstate = wpa_driver_nl80211_set_operstate, .set_country = wpa_driver_nl80211_set_country, .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie, #ifdef CONFIG_CLIENT_MLME .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data, .set_channel = wpa_driver_nl80211_set_channel, .set_ssid = wpa_driver_nl80211_set_ssid, .set_bssid = wpa_driver_nl80211_set_bssid, .send_mlme = wpa_driver_nl80211_send_mlme, .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta, .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta, #endif /* CONFIG_CLIENT_MLME */ };