/* * iwinfo - Wireless Information Library - NL80211 Backend * * Copyright (C) 2010-2013 Jo-Philipp Wich * * The iwinfo library 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. * * The iwinfo library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with the iwinfo library. If not, see http://www.gnu.org/licenses/. * * The signal handling code is derived from the official madwifi tools, * wlanconfig.c in particular. The encryption property handling was * inspired by the hostapd madwifi driver. * * Parts of this code are derived from the Linux iw utility. */ #include #include #include #include #include #include #include "iwinfo_nl80211.h" #define min(x, y) ((x) < (y)) ? (x) : (y) #define BIT(x) (1ULL<<(x)) static struct nl80211_state *nls = NULL; static void nl80211_close(void) { if (nls) { if (nls->nlctrl) genl_family_put(nls->nlctrl); if (nls->nl80211) genl_family_put(nls->nl80211); if (nls->nl_sock) nl_socket_free(nls->nl_sock); if (nls->nl_cache) nl_cache_free(nls->nl_cache); free(nls); nls = NULL; } } static int nl80211_init(void) { int err, fd; if (!nls) { nls = malloc(sizeof(struct nl80211_state)); if (!nls) { err = -ENOMEM; goto err; } memset(nls, 0, sizeof(*nls)); nls->nl_sock = nl_socket_alloc(); if (!nls->nl_sock) { err = -ENOMEM; goto err; } if (genl_connect(nls->nl_sock)) { err = -ENOLINK; goto err; } fd = nl_socket_get_fd(nls->nl_sock); if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) { err = -EINVAL; goto err; } if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) { err = -ENOMEM; goto err; } nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211"); if (!nls->nl80211) { err = -ENOENT; goto err; } nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl"); if (!nls->nlctrl) { err = -ENOENT; goto err; } } return 0; err: nl80211_close(); return err; } static int nl80211_readint(const char *path) { int fd; int rv = -1; char buffer[16]; if ((fd = open(path, O_RDONLY)) > -1) { if (read(fd, buffer, sizeof(buffer)) > 0) rv = atoi(buffer); close(fd); } return rv; } static int nl80211_readstr(const char *path, char *buffer, int length) { int fd; int rv = -1; if ((fd = open(path, O_RDONLY)) > -1) { if ((rv = read(fd, buffer, length - 1)) > 0) { if (buffer[rv - 1] == '\n') rv--; buffer[rv] = 0; } close(fd); } return rv; } static int nl80211_get_band(int nla_type) { switch (nla_type) { case NL80211_BAND_2GHZ: return IWINFO_BAND_24; case NL80211_BAND_5GHZ: return IWINFO_BAND_5; case NL80211_BAND_6GHZ: return IWINFO_BAND_6; case NL80211_BAND_60GHZ: return IWINFO_BAND_60; } return 0; } static int nl80211_msg_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) { int *ret = arg; *ret = err->error; return NL_STOP; } static int nl80211_msg_finish(struct nl_msg *msg, void *arg) { int *ret = arg; *ret = 0; return NL_SKIP; } static int nl80211_msg_ack(struct nl_msg *msg, void *arg) { int *ret = arg; *ret = 0; return NL_STOP; } static int nl80211_msg_response(struct nl_msg *msg, void *arg) { return NL_SKIP; } static void nl80211_free(struct nl80211_msg_conveyor *cv) { if (cv) { if (cv->cb) nl_cb_put(cv->cb); if (cv->msg) nlmsg_free(cv->msg); cv->cb = NULL; cv->msg = NULL; } } static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family, int cmd, int flags) { static struct nl80211_msg_conveyor cv; struct nl_msg *req = NULL; struct nl_cb *cb = NULL; req = nlmsg_alloc(); if (!req) goto err; cb = nl_cb_alloc(NL_CB_DEFAULT); if (!cb) goto err; genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0); cv.msg = req; cv.cb = cb; return &cv; err: if (req) nlmsg_free(req); return NULL; } static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags) { if (nl80211_init() < 0) return NULL; return nl80211_new(nls->nlctrl, cmd, flags); } static const char *nl80211_phy_path_str(const char *phyname) { static char path[PATH_MAX]; const char *prefix = "/sys/devices/"; int prefix_len = strlen(prefix); int buf_len, offset; struct dirent *e; char buf[512], *link; int phy_idx; int seq = 0; DIR *d; snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", phyname); phy_idx = nl80211_readint(buf); if (phy_idx < 0) return NULL; buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname); link = realpath(buf, path); if (!link) return NULL; if (strncmp(link, prefix, prefix_len) != 0) return NULL; link += prefix_len; prefix = "platform/"; prefix_len = strlen(prefix); if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci")) link += prefix_len; snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211"); d = opendir(buf); if (!d) return link; while ((e = readdir(d)) != NULL) { int cur_idx; snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); cur_idx = nl80211_readint(buf); if (cur_idx < 0) continue; if (cur_idx >= phy_idx) continue; seq++; } closedir(d); if (!seq) return link; offset = link - path + strlen(link); snprintf(path + offset, sizeof(path) - offset, "+%d", seq); return link; } static int nl80211_phy_idx_from_path(const char *path) { char buf[512]; struct dirent *e; const char *cur_path; int cur_path_len; int path_len; int idx = -1; DIR *d; if (!path) return -1; path_len = strlen(path); if (!path_len) return -1; d = opendir("/sys/class/ieee80211"); if (!d) return -1; while ((e = readdir(d)) != NULL) { cur_path = nl80211_phy_path_str(e->d_name); if (!cur_path) continue; cur_path_len = strlen(cur_path); if (cur_path_len < path_len) continue; if (strcmp(cur_path + cur_path_len - path_len, path) != 0) continue; snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name); idx = nl80211_readint(buf); if (idx >= 0) break; } closedir(d); return idx; } static int nl80211_phy_idx_from_macaddr(const char *opt) { char buf[128]; int i, idx = -1; glob_t gl; if (!opt) return -1; snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/ if (glob(buf, 0, NULL, &gl)) return -1; for (i = 0; i < gl.gl_pathc; i++) { snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]); if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0) continue; if (fnmatch(opt, buf, FNM_CASEFOLD)) continue; snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]); if ((idx = nl80211_readint(buf)) > -1) break; } globfree(&gl); return idx; } static int nl80211_phy_idx_from_phy(const char *opt) { char buf[128]; if (!opt) return -1; snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt); return nl80211_readint(buf); } static int nl80211_phy_idx_from_uci(const char *name) { struct uci_section *s; const char *opt; int idx = -1; s = iwinfo_uci_get_radio(name, "mac80211"); if (!s) goto out; opt = uci_lookup_option_string(uci_ctx, s, "path"); idx = nl80211_phy_idx_from_path(opt); if (idx >= 0) goto out; opt = uci_lookup_option_string(uci_ctx, s, "macaddr"); idx = nl80211_phy_idx_from_macaddr(opt); if (idx >= 0) goto out; opt = uci_lookup_option_string(uci_ctx, s, "phy"); idx = nl80211_phy_idx_from_phy(opt); out: iwinfo_uci_free(); return idx; } static bool nl80211_is_ifname(const char *name) { struct stat st; char buffer[PATH_MAX]; snprintf(buffer, sizeof(buffer), "/sys/class/net/%s", name); return !lstat(buffer, &st); } static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags) { unsigned int ifidx = 0; int phyidx = -1; struct nl80211_msg_conveyor *cv; if (ifname == NULL) return NULL; if (nl80211_init() < 0) return NULL; if (!strncmp(ifname, "mon.", 4)) ifidx = if_nametoindex(&ifname[4]); else if (nl80211_is_ifname(ifname)) ifidx = if_nametoindex(ifname); else { phyidx = nl80211_phy_idx_from_phy(ifname); if (phyidx < 0) phyidx = nl80211_phy_idx_from_uci(ifname); } /* Valid ifidx must be greater than 0 */ if ((ifidx <= 0) && (phyidx < 0)) return NULL; cv = nl80211_new(nls->nl80211, cmd, flags); if (!cv) return NULL; if (ifidx > 0) NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx); else if (phyidx > -1) NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx); return cv; nla_put_failure: nl80211_free(cv); return NULL; } static int nl80211_send(struct nl80211_msg_conveyor *cv, int (*cb_func)(struct nl_msg *, void *), void *cb_arg) { static struct nl80211_msg_conveyor rcv; int err; if (cb_func) nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg); else nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv); err = nl_send_auto_complete(nls->nl_sock, cv->msg); if (err < 0) goto out; err = 1; nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err); nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err); nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err); while (err > 0) nl_recvmsgs(nls->nl_sock, cv->cb); out: nl80211_free(cv); return err; } static int nl80211_request(const char *ifname, int cmd, int flags, int (*cb_func)(struct nl_msg *, void *), void *cb_arg) { struct nl80211_msg_conveyor *cv; cv = nl80211_msg(ifname, cmd, flags); if (!cv) return -ENOMEM; return nl80211_send(cv, cb_func, cb_arg); } static struct nlattr ** nl80211_parse(struct nl_msg *msg) { struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); static struct nlattr *attr[NL80211_ATTR_MAX + 1]; nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL); return attr; } static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg) { uint32_t *features = arg; struct nlattr **attr = nl80211_parse(msg); if (attr[NL80211_ATTR_PROTOCOL_FEATURES]) *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]); return NL_SKIP; } static int nl80211_get_protocol_features(const char *ifname) { struct nl80211_msg_conveyor *req; uint32_t features = 0; req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0); if (req) { nl80211_send(req, nl80211_get_protocol_features_cb, &features); nl80211_free(req); } return features; } static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg) { struct nl80211_group_conveyor *cv = arg; struct nlattr **attr = nl80211_parse(msg); struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1]; struct nlattr *mgrp; int mgrpidx; if (!attr[CTRL_ATTR_MCAST_GROUPS]) return NL_SKIP; nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx) { nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mgrp), nla_len(mgrp), NULL); if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] && mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] && !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]), cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]))) { cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]); break; } } return NL_SKIP; } static int nl80211_subscribe(const char *family, const char *group) { struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT }; struct nl80211_msg_conveyor *req; int err; req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0); if (req) { NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family); err = nl80211_send(req, nl80211_subscribe_cb, &cv); if (err) return err; return nl_socket_add_membership(nls->nl_sock, cv.id); nla_put_failure: nl80211_free(req); } return -ENOMEM; } static int nl80211_wait_cb(struct nl_msg *msg, void *arg) { struct nl80211_event_conveyor *cv = arg; struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32))) cv->recv = gnlh->cmd; return NL_SKIP; } static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg) { return NL_OK; } static int __nl80211_wait(const char *family, const char *group, ...) { struct nl80211_event_conveyor cv = { }; struct nl_cb *cb; int err = 0; int cmd; va_list ap; if (nl80211_subscribe(family, group)) return -ENOENT; cb = nl_cb_alloc(NL_CB_DEFAULT); if (!cb) return -ENOMEM; nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err); nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL); nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv ); va_start(ap, group); for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int)) cv.wait[cmd / 32] |= (1 << (cmd % 32)); va_end(ap); while (!cv.recv && !err) nl_recvmsgs(nls->nl_sock, cb); nl_cb_put(cb); return err; } #define nl80211_wait(family, group, ...) \ __nl80211_wait(family, group, __VA_ARGS__, 0) /* This is linux's ieee80211_freq_khz_to_channel() which is: * SPDX-License-Identifier: GPL-2.0 * Copyright 2007-2009 Johannes Berg * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright 2017 Intel Deutschland GmbH * Copyright (C) 2018-2022 Intel Corporation */ static int nl80211_freq2channel(int freq) { if (freq == 2484) return 14; else if (freq < 2484) return (freq - 2407) / 5; else if (freq >= 4910 && freq <= 4980) return (freq - 4000) / 5; else if (freq < 5925) return (freq - 5000) / 5; else if (freq == 5935) return 2; else if (freq <= 45000) /* DMG band lower limit */ /* see 802.11ax D6.1 27.3.22.2 */ return (freq - 5950) / 5; else if (freq >= 58320 && freq <= 70200) return (freq - 56160) / 2160; else return 0; } /* This is linux's ieee80211_channel_to_freq_khz() which is: * SPDX-License-Identifier: GPL-2.0 * Copyright 2007-2009 Johannes Berg * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright 2017 Intel Deutschland GmbH * Copyright (C) 2018-2022 Intel Corporation */ static int nl80211_channel2freq(int channel, const char *band, bool ax) { if (channel < 1) return 0; if (!band || band[0] != 'a') { if (channel == 14) return 2484; else if (channel < 14) return (channel * 5) + 2407; } else if (strcmp(band, "ad") == 0) { if (channel < 7) return 56160 + 2160 * channel; } else if (ax) { if (channel == 2) return 5935; if (channel < 233) return (channel * 5) + 5950; } else { if (channel >= 182 && channel <= 196) return (channel * 5) + 4000; else return (channel * 5) + 5000; } return 0; } static uint8_t nl80211_freq2band(int freq) { if (freq >= 2412 && freq <= 2484) return IWINFO_BAND_24; else if (freq >= 5160 && freq <= 5885) return IWINFO_BAND_5; else if (freq >= 5925 && freq <= 7125) return IWINFO_BAND_6; else if (freq >= 58320 && freq <= 69120) return IWINFO_BAND_60; return 0; } static int nl80211_phyname_cb(struct nl_msg *msg, void *arg) { char *buf = arg; struct nlattr **attr = nl80211_parse(msg); if (attr[NL80211_ATTR_WIPHY_NAME]) memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]), nla_len(attr[NL80211_ATTR_WIPHY_NAME])); else buf[0] = 0; return NL_SKIP; } static char * nl80211_ifname2phy(const char *ifname) { static char phy[32] = { 0 }; memset(phy, 0, sizeof(phy)); nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, nl80211_phyname_cb, phy); return phy[0] ? phy : NULL; } static char * nl80211_phyidx2name(unsigned int idx) { struct nl80211_msg_conveyor *cv; static char phy[32] = { 0 }; if (nl80211_init() < 0) return NULL; cv = nl80211_new(nls->nl80211, NL80211_CMD_GET_WIPHY, 0); if (!cv) return NULL; NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, idx); memset(phy, 0, sizeof(phy)); nl80211_send(cv, nl80211_phyname_cb, phy); return phy[0] ? phy : NULL; nla_put_failure: return NULL; } static char * nl80211_phy2ifname(const char *ifname) { int ifidx = -1, cifidx, lmode = 1, clmode, phyidx; char buffer[512]; static char nif[IFNAMSIZ] = { 0 }; DIR *d; struct dirent *e; /* Only accept phy name of the form phy%d or radio%d */ if (!ifname) return NULL; phyidx = nl80211_phy_idx_from_phy(ifname); if (phyidx < 0) phyidx = nl80211_phy_idx_from_uci(ifname);; if (phyidx < 0) return NULL; memset(nif, 0, sizeof(nif)); snprintf(buffer, sizeof(buffer), "/sys/class/ieee80211/phy%d/device/net", phyidx); if ((d = opendir(buffer)) != NULL) { while ((e = readdir(d)) != NULL) { snprintf(buffer, sizeof(buffer), "/sys/class/net/%s/ifindex", e->d_name); cifidx = nl80211_readint(buffer); if (cifidx < 0) continue; snprintf(buffer, sizeof(buffer), "/sys/class/net/%s/link_mode", e->d_name); clmode = nl80211_readint(buffer); /* prefer non-supplicant-based devices */ if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1))) { ifidx = cifidx; lmode = clmode; strncpy(nif, e->d_name, sizeof(nif) - 1); } } closedir(d); } return nif[0] ? nif : NULL; } static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg) { int *mode = arg; struct nlattr **tb = nl80211_parse(msg); const int ifmodes[NL80211_IFTYPE_MAX + 1] = { IWINFO_OPMODE_UNKNOWN, /* unspecified */ IWINFO_OPMODE_ADHOC, /* IBSS */ IWINFO_OPMODE_CLIENT, /* managed */ IWINFO_OPMODE_MASTER, /* AP */ IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */ IWINFO_OPMODE_WDS, /* WDS */ IWINFO_OPMODE_MONITOR, /* monitor */ IWINFO_OPMODE_MESHPOINT, /* mesh point */ IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */ IWINFO_OPMODE_P2P_GO, /* P2P-GO */ }; if (tb[NL80211_ATTR_IFTYPE]) *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])]; return NL_SKIP; } static int nl80211_get_mode(const char *ifname, int *buf) { char *res; *buf = IWINFO_OPMODE_UNKNOWN; res = nl80211_phy2ifname(ifname); nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_mode_cb, buf); return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0; } static int __nl80211_hostapd_query(const char *ifname, ...) { va_list ap, ap_cur; char *phy, *search, *dest, *key, *val, buf[128]; int len, mode, found = 0, match = 1; FILE *fp; if (nl80211_get_mode(ifname, &mode)) return 0; if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN) return 0; phy = nl80211_ifname2phy(ifname); if (!phy) return 0; snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy); fp = fopen(buf, "r"); if (!fp) return 0; va_start(ap, ifname); /* clear all destination buffers */ va_copy(ap_cur, ap); while ((search = va_arg(ap_cur, char *)) != NULL) { dest = va_arg(ap_cur, char *); len = va_arg(ap_cur, int); memset(dest, 0, len); } va_end(ap_cur); /* iterate applicable lines and copy found values into dest buffers */ while (fgets(buf, sizeof(buf), fp)) { key = strtok(buf, " =\t\n"); val = strtok(NULL, "\n"); if (!key || !val || !*key || *key == '#') continue; if (!strcmp(key, "interface") || !strcmp(key, "bss")) match = !strcmp(ifname, val); if (!match) continue; va_copy(ap_cur, ap); while ((search = va_arg(ap_cur, char *)) != NULL) { dest = va_arg(ap_cur, char *); len = va_arg(ap_cur, int); if (!strcmp(search, key)) { strncpy(dest, val, len - 1); found++; break; } } va_end(ap_cur); } fclose(fp); va_end(ap); return found; } #define nl80211_hostapd_query(ifname, ...) \ __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL) static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) { fd_set rfds; struct timeval tv = { 0, 256000 }; FD_ZERO(&rfds); FD_SET(sock, &rfds); memset(buf, 0, blen); if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0) return -1; if (!FD_ISSET(sock, &rfds)) return -1; return recv(sock, buf, blen - 1, 0); } static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local) { struct sockaddr_un remote = { 0 }; size_t remote_length, local_length; int sock = socket(PF_UNIX, SOCK_DGRAM, 0); if (sock < 0) return sock; remote.sun_family = AF_UNIX; remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname); /* Set client socket file permissions so that bind() creates the client * socket with these permissions and there is no need to try to change * them with chmod() after bind() which would have potential issues with * race conditions. These permissions are needed to make sure the server * side (wpa_supplicant or hostapd) can reply to the control interface * messages. * * The lchown() calls below after bind() are also part of the needed * operations to allow the response to go through. Those are using the * no-deference-symlinks version to avoid races. */ fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0) { close(sock); return -1; } if (connect(sock, (struct sockaddr *)&remote, remote_length)) { close(sock); return -1; } local->sun_family = AF_UNIX; local_length = sizeof(local->sun_family) + sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid()); if (bind(sock, (struct sockaddr *)local, local_length) < 0) { close(sock); return -1; } /* Set group even if we do not have privileges to change owner */ lchown(local->sun_path, -1, 101); lchown(local->sun_path, 101, 101); return sock; } static int __nl80211_wpactl_query(const char *ifname, ...) { va_list ap, ap_cur; struct sockaddr_un local = { 0 }; int len, mode, found = 0, sock = -1; char *search, *dest, *key, *val, *line, *pos, buf[512]; if (nl80211_get_mode(ifname, &mode)) return 0; if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC && mode != IWINFO_OPMODE_MESHPOINT) return 0; sock = nl80211_wpactl_connect(ifname, &local); if (sock < 0) return 0; va_start(ap, ifname); /* clear all destination buffers */ va_copy(ap_cur, ap); while ((search = va_arg(ap_cur, char *)) != NULL) { dest = va_arg(ap_cur, char *); len = va_arg(ap_cur, int); memset(dest, 0, len); } va_end(ap_cur); send(sock, "STATUS", 6, 0); while (true) { if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0) break; if (buf[0] == '<') continue; for (line = strtok_r(buf, "\n", &pos); line != NULL; line = strtok_r(NULL, "\n", &pos)) { key = strtok(line, "="); val = strtok(NULL, "\n"); if (!key || !val) continue; va_copy(ap_cur, ap); while ((search = va_arg(ap_cur, char *)) != NULL) { dest = va_arg(ap_cur, char *); len = va_arg(ap_cur, int); if (!strcmp(search, key)) { strncpy(dest, val, len - 1); found++; break; } } va_end(ap_cur); } break; } va_end(ap); close(sock); unlink(local.sun_path); return found; } #define nl80211_wpactl_query(ifname, ...) \ __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL) static char * nl80211_ifadd(const char *ifname) { char path[PATH_MAX]; static char nif[IFNAMSIZ] = { 0 }; struct nl80211_msg_conveyor *req; FILE *sysfs; req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0); if (req) { snprintf(nif, sizeof(nif), "tmp.%s", ifname); NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif); NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION); nl80211_send(req, NULL, NULL); snprintf(path, sizeof(path) - 1, "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif); if ((sysfs = fopen(path, "w")) != NULL) { fwrite("0\n", 1, 2, sysfs); fclose(sysfs); } return nif; nla_put_failure: nl80211_free(req); } return NULL; } static void nl80211_ifdel(const char *ifname) { struct nl80211_msg_conveyor *req; req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0); if (req) { NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname); nl80211_send(req, NULL, NULL); return; nla_put_failure: nl80211_free(req); } } static void nl80211_hostapd_hup(const char *ifname) { int fd, pid = 0; char buf[32]; char *phy = nl80211_ifname2phy(ifname); if (phy) { snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy); if ((fd = open(buf, O_RDONLY)) >= 0) { if (read(fd, buf, sizeof(buf)) > 0) pid = atoi(buf); close(fd); } if (pid > 0) kill(pid, 1); } } static int nl80211_probe(const char *ifname) { return !!nl80211_ifname2phy(ifname); } struct nl80211_ssid_bssid { unsigned char *ssid; unsigned char bssid[7]; }; static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg) { struct nl80211_ssid_bssid *sb = arg; struct nlattr **tb = nl80211_parse(msg); if (tb[NL80211_ATTR_MAC]) { sb->bssid[0] = 1; memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]), sizeof(sb->bssid) - 1); } return NL_SKIP; } static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg) { int ielen; unsigned char *ie; struct nl80211_ssid_bssid *sb = arg; struct nlattr **tb = nl80211_parse(msg); struct nlattr *bss[NL80211_BSS_MAX + 1]; static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, [NL80211_BSS_STATUS] = { .type = NLA_U32 }, }; if (!tb[NL80211_ATTR_BSS] || nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy) || !bss[NL80211_BSS_BSSID] || !bss[NL80211_BSS_STATUS] || !bss[NL80211_BSS_INFORMATION_ELEMENTS]) { return NL_SKIP; } switch (nla_get_u32(bss[NL80211_BSS_STATUS])) { case NL80211_BSS_STATUS_ASSOCIATED: case NL80211_BSS_STATUS_AUTHENTICATED: case NL80211_BSS_STATUS_IBSS_JOINED: if (sb->ssid) { ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); while (ielen >= 2 && ielen >= ie[1]) { if (ie[0] == 0) { memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE)); return NL_SKIP; } ielen -= ie[1] + 2; ie += ie[1] + 2; } } else { sb->bssid[0] = 1; memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6); return NL_SKIP; } default: return NL_SKIP; } } static int nl80211_get_ssid(const char *ifname, char *buf) { char *res; struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf }; /* try to find ssid from scan dump results */ res = nl80211_phy2ifname(ifname); sb.ssid[0] = 0; nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, nl80211_get_ssid_bssid_cb, &sb); /* failed, try to find from hostapd info */ if (sb.ssid[0] == 0) nl80211_hostapd_query(ifname, "ssid", sb.ssid, IWINFO_ESSID_MAX_SIZE + 1); /* failed, try to obtain Mesh ID */ if (sb.ssid[0] == 0) iwinfo_ubus_query(res ? res : ifname, "mesh_id", buf, IWINFO_ESSID_MAX_SIZE + 1); return (sb.ssid[0] == 0) ? -1 : 0; } static int nl80211_get_bssid(const char *ifname, char *buf) { char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")]; struct nl80211_ssid_bssid sb = { }; res = nl80211_phy2ifname(ifname); /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */ nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_macaddr_cb, &sb); /* failed, try to find bssid from scan dump results */ if (sb.bssid[0] == 0) nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, nl80211_get_ssid_bssid_cb, &sb); /* failed, try to find mac from hostapd info */ if ((sb.bssid[0] == 0) && nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid))) { sb.bssid[0] = 1; sb.bssid[1] = strtol(&bssid[0], NULL, 16); sb.bssid[2] = strtol(&bssid[3], NULL, 16); sb.bssid[3] = strtol(&bssid[6], NULL, 16); sb.bssid[4] = strtol(&bssid[9], NULL, 16); sb.bssid[5] = strtol(&bssid[12], NULL, 16); sb.bssid[6] = strtol(&bssid[15], NULL, 16); } if (sb.bssid[0]) { sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", sb.bssid[1], sb.bssid[2], sb.bssid[3], sb.bssid[4], sb.bssid[5], sb.bssid[6]); return 0; } return -1; } static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg) { int *freq = arg; struct nlattr **attr = nl80211_parse(msg); struct nlattr *binfo[NL80211_BSS_MAX + 1]; static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, [NL80211_BSS_STATUS] = { .type = NLA_U32 }, }; if (attr[NL80211_ATTR_BSS] && !nla_parse_nested(binfo, NL80211_BSS_MAX, attr[NL80211_ATTR_BSS], bss_policy)) { if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY]) *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]); } return NL_SKIP; } static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg) { int *freq = arg; struct nlattr **tb = nl80211_parse(msg); if (tb[NL80211_ATTR_WIPHY_FREQ]) *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]); return NL_SKIP; } static int nl80211_get_frequency(const char *ifname, int *buf) { char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 }; /* try to find frequency from interface info */ res = nl80211_phy2ifname(ifname); *buf = 0; nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_frequency_info_cb, buf); /* failed, try to find frequency from hostapd info */ if ((*buf == 0) && nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode), "channel", channel, sizeof(channel), "ieee80211ax", ax, sizeof(ax)) >= 2) { *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1'); } /* failed, try to find frequency from scan results */ if (*buf == 0) { res = nl80211_phy2ifname(ifname); nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, nl80211_get_frequency_scan_cb, buf); } return (*buf == 0) ? -1 : 0; } static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg) { int *freq = arg; struct nlattr **tb = nl80211_parse(msg); if (tb[NL80211_ATTR_CENTER_FREQ1]) *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]); return NL_SKIP; } static int nl80211_get_center_freq1(const char *ifname, int *buf) { char *res; /* try to find frequency from interface info */ res = nl80211_phy2ifname(ifname); *buf = 0; nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_center_freq1_cb, buf); return (*buf == 0) ? -1 : 0; } static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg) { int *freq = arg; struct nlattr **tb = nl80211_parse(msg); if (tb[NL80211_ATTR_CENTER_FREQ2]) *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]); return NL_SKIP; } static int nl80211_get_center_freq2(const char *ifname, int *buf) { char *res; /* try to find frequency from interface info */ res = nl80211_phy2ifname(ifname); *buf = 0; nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_center_freq2_cb, buf); return (*buf == 0) ? -1 : 0; } static int nl80211_get_channel(const char *ifname, int *buf) { if (!nl80211_get_frequency(ifname, buf)) { *buf = nl80211_freq2channel(*buf); return 0; } return -1; } static int nl80211_get_center_chan1(const char *ifname, int *buf) { if (!nl80211_get_center_freq1(ifname, buf)) { *buf = nl80211_freq2channel(*buf); return 0; } return -1; } static int nl80211_get_center_chan2(const char *ifname, int *buf) { if (!nl80211_get_center_freq2(ifname, buf)) { *buf = nl80211_freq2channel(*buf); return 0; } return -1; } static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg) { int *buf = arg; struct nlattr **tb = nl80211_parse(msg); if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]) *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])); return NL_SKIP; } static int nl80211_get_txpower(const char *ifname, int *buf) { char *res; res = nl80211_phy2ifname(ifname); *buf = 0; if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_txpower_cb, buf)) return -1; return 0; } static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg) { int8_t dbm; int16_t mbit; struct nl80211_rssi_rate *rr = arg; struct nlattr **attr = nl80211_parse(msg); struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, }; static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, }; if (attr[NL80211_ATTR_STA_INFO]) { if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, attr[NL80211_ATTR_STA_INFO], stats_policy)) { if (sinfo[NL80211_STA_INFO_SIGNAL]) { dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1); rr->rssi_samples++; } if (sinfo[NL80211_STA_INFO_TX_BITRATE]) { if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) { if (rinfo[NL80211_RATE_INFO_BITRATE]) { mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]); rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1); rr->rate_samples++; } } } } } return NL_SKIP; } static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) { DIR *d; struct dirent *de; memset(r, 0, sizeof(*r)); if ((d = opendir("/sys/class/net")) != NULL) { while ((de = readdir(d)) != NULL) { if (!strncmp(de->d_name, ifname, strlen(ifname)) && (!de->d_name[strlen(ifname)] || !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) { nl80211_request(de->d_name, NL80211_CMD_GET_STATION, NLM_F_DUMP, nl80211_fill_signal_cb, r); } } closedir(d); } } static int nl80211_get_bitrate(const char *ifname, int *buf) { struct nl80211_rssi_rate rr; nl80211_fill_signal(ifname, &rr); if (rr.rate_samples) { *buf = (rr.rate * 100); return 0; } return -1; } static int nl80211_get_signal(const char *ifname, int *buf) { struct nl80211_rssi_rate rr; nl80211_fill_signal(ifname, &rr); if (rr.rssi_samples) { *buf = rr.rssi; return 0; } return -1; } static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg) { int8_t *noise = arg; struct nlattr **tb = nl80211_parse(msg); struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1]; static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = { [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, }; if (!tb[NL80211_ATTR_SURVEY_INFO]) return NL_SKIP; if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX, tb[NL80211_ATTR_SURVEY_INFO], sp)) return NL_SKIP; if (!si[NL80211_SURVEY_INFO_NOISE]) return NL_SKIP; if (!*noise || si[NL80211_SURVEY_INFO_IN_USE]) *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]); return NL_SKIP; } static int nl80211_get_noise(const char *ifname, int *buf) { int8_t noise = 0; if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, nl80211_get_noise_cb, &noise)) goto out; *buf = noise; return 0; out: *buf = 0; return -1; } static int nl80211_get_quality(const char *ifname, int *buf) { int signal; if (!nl80211_get_signal(ifname, &signal)) { /* A positive signal level is usually just a quality * value, pass through as-is */ if (signal >= 0) { *buf = signal; } /* The cfg80211 wext compat layer assumes a signal range * of -110 dBm to -40 dBm, the quality value is derived * by adding 110 to the signal level */ else { if (signal < -110) signal = -110; else if (signal > -40) signal = -40; *buf = (signal + 110); } return 0; } return -1; } static int nl80211_get_quality_max(const char *ifname, int *buf) { /* The cfg80211 wext compat layer assumes a maximum * quality of 70 */ *buf = 70; return 0; } static int nl80211_check_wepkey(const char *key) { if (key && *key) { switch (strlen(key)) { case 5: case 10: return IWINFO_CIPHER_WEP40; case 13: case 26: return IWINFO_CIPHER_WEP104; } } return 0; } static struct { const char *match; int version; int suite; } wpa_key_mgmt_strings[] = { { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x }, { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x }, { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x }, { "EAP-SHA384", 4, IWINFO_KMGMT_8021x }, { "EAP-SHA256", 0, IWINFO_KMGMT_8021x }, { "PSK-SHA256", 0, IWINFO_KMGMT_PSK }, { "NONE", 0, IWINFO_KMGMT_NONE }, { "None", 0, IWINFO_KMGMT_NONE }, { "PSK", 0, IWINFO_KMGMT_PSK }, { "EAP", 0, IWINFO_KMGMT_8021x }, { "SAE", 4, IWINFO_KMGMT_SAE }, { "OWE", 4, IWINFO_KMGMT_OWE } }; static void parse_wpa_suites(const char *str, int defversion, uint8_t *versions, uint8_t *suites) { size_t l; int i, version; const char *p, *q, *m, *sep = " \t\n,-+/"; for (p = str; *p; ) { q = p; for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++) { m = wpa_key_mgmt_strings[i].match; l = strlen(m); if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) { if (wpa_key_mgmt_strings[i].version != 0) version = wpa_key_mgmt_strings[i].version; else version = defversion; *versions |= version; *suites |= wpa_key_mgmt_strings[i].suite; q += l; break; } } if (q == p) q += strcspn(q, sep); p = q + strspn(q, sep); } } static struct { const char *match; int cipher; } wpa_cipher_strings[] = { { "WEP-104", IWINFO_CIPHER_WEP104 }, { "WEP-40", IWINFO_CIPHER_WEP40 }, { "NONE", IWINFO_CIPHER_NONE }, { "TKIP", IWINFO_CIPHER_TKIP }, { "CCMP-256",IWINFO_CIPHER_CCMP256 }, { "CCMP", IWINFO_CIPHER_CCMP }, { "GCMP-256",IWINFO_CIPHER_GCMP256 }, { "GCMP", IWINFO_CIPHER_GCMP } }; static void parse_wpa_ciphers(const char *str, uint16_t *ciphers) { int i; size_t l; const char *m, *p, *q, *sep = " \t\n,-+/"; for (p = str; *p; ) { q = p; for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++) { m = wpa_cipher_strings[i].match; l = strlen(m); if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l]))) { *ciphers |= wpa_cipher_strings[i].cipher; q += l; break; } } if (q == p) q += strcspn(q, sep); p = q + strspn(q, sep); } } static int nl80211_get_encryption(const char *ifname, char *buf) { char *p; int opmode; uint8_t wpa_version = 0; char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16]; char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27]; char mode[16]; struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; /* WPA supplicant */ if (nl80211_wpactl_query(ifname, "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise), "group_cipher", wpa_groupwise, sizeof(wpa_groupwise), "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), "mode", mode, sizeof(mode))) { /* WEP or Open */ if (!strcmp(wpa_key_mgmt, "NONE")) { parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) { c->enabled = 1; c->auth_suites = IWINFO_KMGMT_NONE; c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; } else { c->pair_ciphers = 0; c->group_ciphers = 0; } } /* MESH with SAE */ else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN")) { c->enabled = 1; c->wpa_version = 4; c->auth_suites = IWINFO_KMGMT_SAE; c->pair_ciphers = IWINFO_CIPHER_CCMP; c->group_ciphers = IWINFO_CIPHER_CCMP; } /* WPA */ else { parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers); p = wpa_key_mgmt; if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5)) { p += 5; wpa_version = 2; } else if (!strncmp(p, "WPA-", 4)) { p += 4; wpa_version = 1; } parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites); c->enabled = !!(c->wpa_version && c->auth_suites); } return 0; } /* Hostapd */ else if (nl80211_hostapd_query(ifname, "wpa", wpa, sizeof(wpa), "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt), "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise), "auth_algs", auth_algs, sizeof(auth_algs), "wep_key0", wep_key0, sizeof(wep_key0), "wep_key1", wep_key1, sizeof(wep_key1), "wep_key2", wep_key2, sizeof(wep_key2), "wep_key3", wep_key3, sizeof(wep_key3))) { c->wpa_version = 0; if (wpa_key_mgmt[0]) { for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t")) { if (!strncmp(p, "WPA-", 4)) p += 4; if (!strncmp(p, "FT-", 3)) p += 3; parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites); } c->enabled = c->wpa_version ? 1 : 0; } if (wpa_pairwise[0]) parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers); if (auth_algs[0]) { switch (atoi(auth_algs)) { case 1: c->auth_algs |= IWINFO_AUTH_OPEN; break; case 2: c->auth_algs |= IWINFO_AUTH_SHARED; break; case 3: c->auth_algs |= IWINFO_AUTH_OPEN; c->auth_algs |= IWINFO_AUTH_SHARED; break; } c->pair_ciphers |= nl80211_check_wepkey(wep_key0); c->pair_ciphers |= nl80211_check_wepkey(wep_key1); c->pair_ciphers |= nl80211_check_wepkey(wep_key2); c->pair_ciphers |= nl80211_check_wepkey(wep_key3); c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0; } c->group_ciphers = c->pair_ciphers; return 0; } /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */ else if (!nl80211_get_mode(ifname, &opmode) && (opmode == IWINFO_OPMODE_ADHOC || opmode == IWINFO_OPMODE_MESHPOINT)) { c->enabled = 0; return 0; } return -1; } static int nl80211_get_phyname(const char *ifname, char *buf) { const char *name; name = nl80211_ifname2phy(ifname); if (name) { strcpy(buf, name); return 0; } else if ((name = nl80211_phy2ifname(ifname)) != NULL) { name = nl80211_ifname2phy(name); if (name) { strcpy(buf, ifname); return 0; } } return -1; } static void nl80211_parse_rateinfo(struct nlattr **ri, struct iwinfo_rate_entry *re) { if (ri[NL80211_RATE_INFO_BITRATE32]) re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100; else if (ri[NL80211_RATE_INFO_BITRATE]) re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100; if (ri[NL80211_RATE_INFO_HE_MCS]) { re->is_he = 1; re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]); if (ri[NL80211_RATE_INFO_HE_NSS]) re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]); if (ri[NL80211_RATE_INFO_HE_GI]) re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]); if (ri[NL80211_RATE_INFO_HE_DCM]) re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]); } else if (ri[NL80211_RATE_INFO_VHT_MCS]) { re->is_vht = 1; re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]); if (ri[NL80211_RATE_INFO_VHT_NSS]) re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]); } else if (ri[NL80211_RATE_INFO_MCS]) { re->is_ht = 1; re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]); } if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH]) re->mhz = 5; else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH]) re->mhz = 10; else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH]) re->mhz = 40; else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH]) re->mhz = 80; else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] || ri[NL80211_RATE_INFO_160_MHZ_WIDTH]) re->mhz = 160; else re->mhz = 20; if (ri[NL80211_RATE_INFO_SHORT_GI]) re->is_short_gi = 1; re->is_40mhz = (re->mhz == 40); } static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg) { struct nl80211_array_buf *arr = arg; struct iwinfo_survey_entry *e = arr->buf; struct nlattr **attr = nl80211_parse(msg); struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1]; int rc; static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = { [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 }, [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 }, [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 }, [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 }, [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 }, [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 }, [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 }, }; rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX, attr[NL80211_ATTR_SURVEY_INFO], survey_policy); if (rc) return NL_SKIP; /* advance to end of array */ e += arr->count; memset(e, 0, sizeof(*e)); if (sinfo[NL80211_SURVEY_INFO_FREQUENCY]) e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]); if (sinfo[NL80211_SURVEY_INFO_NOISE]) e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]); if (sinfo[NL80211_SURVEY_INFO_TIME]) e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]); if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY]) e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]); if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]) e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]); if (sinfo[NL80211_SURVEY_INFO_TIME_RX]) e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]); if (sinfo[NL80211_SURVEY_INFO_TIME_TX]) e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]); arr->count++; return NL_SKIP; } static void plink_state_to_str(char *dst, unsigned state) { switch (state) { case NL80211_PLINK_LISTEN: strcpy(dst, "LISTEN"); break; case NL80211_PLINK_OPN_SNT: strcpy(dst, "OPN_SNT"); break; case NL80211_PLINK_OPN_RCVD: strcpy(dst, "OPN_RCVD"); break; case NL80211_PLINK_CNF_RCVD: strcpy(dst, "CNF_RCVD"); break; case NL80211_PLINK_ESTAB: strcpy(dst, "ESTAB"); break; case NL80211_PLINK_HOLDING: strcpy(dst, "HOLDING"); break; case NL80211_PLINK_BLOCKED: strcpy(dst, "BLOCKED"); break; default: strcpy(dst, "UNKNOWN"); break; } } static void power_mode_to_str(char *dst, struct nlattr *a) { enum nl80211_mesh_power_mode pm = nla_get_u32(a); switch (pm) { case NL80211_MESH_POWER_ACTIVE: strcpy(dst, "ACTIVE"); break; case NL80211_MESH_POWER_LIGHT_SLEEP: strcpy(dst, "LIGHT SLEEP"); break; case NL80211_MESH_POWER_DEEP_SLEEP: strcpy(dst, "DEEP SLEEP"); break; default: strcpy(dst, "UNKNOWN"); break; } } static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg) { struct nl80211_array_buf *arr = arg; struct iwinfo_assoclist_entry *e = arr->buf; struct nlattr **attr = nl80211_parse(msg); struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1]; struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1]; struct nl80211_sta_flag_update *sta_flags; static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = { [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 }, [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 }, [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED }, [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED }, [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 }, [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 }, [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 }, [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 }, [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 }, [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 }, [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 }, [NL80211_STA_INFO_STA_FLAGS] = { .minlen = sizeof(struct nl80211_sta_flag_update) }, [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 }, /* mesh */ [NL80211_STA_INFO_LLID] = { .type = NLA_U16 }, [NL80211_STA_INFO_PLID] = { .type = NLA_U16 }, [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 }, [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 }, [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 }, [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 }, }; static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = { [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 }, [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 }, [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG }, [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG }, }; /* advance to end of array */ e += arr->count; memset(e, 0, sizeof(*e)); if (attr[NL80211_ATTR_MAC]) memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); if (attr[NL80211_ATTR_STA_INFO] && !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, attr[NL80211_ATTR_STA_INFO], stats_policy)) { if (sinfo[NL80211_STA_INFO_SIGNAL]) e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); if (sinfo[NL80211_STA_INFO_SIGNAL_AVG]) e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]); if (sinfo[NL80211_STA_INFO_INACTIVE_TIME]) e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]); if (sinfo[NL80211_STA_INFO_CONNECTED_TIME]) e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]); if (sinfo[NL80211_STA_INFO_RX_PACKETS]) e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]); if (sinfo[NL80211_STA_INFO_TX_PACKETS]) e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]); if (sinfo[NL80211_STA_INFO_RX_BITRATE] && !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy)) nl80211_parse_rateinfo(rinfo, &e->rx_rate); if (sinfo[NL80211_STA_INFO_TX_BITRATE] && !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy)) nl80211_parse_rateinfo(rinfo, &e->tx_rate); if (sinfo[NL80211_STA_INFO_RX_BYTES]) e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]); if (sinfo[NL80211_STA_INFO_TX_BYTES]) e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]); if (sinfo[NL80211_STA_INFO_TX_RETRIES]) e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]); if (sinfo[NL80211_STA_INFO_TX_FAILED]) e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]); if (sinfo[NL80211_STA_INFO_T_OFFSET]) e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]); if (sinfo[NL80211_STA_INFO_RX_DROP_MISC]) e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]); if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]) e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]); /* mesh */ if (sinfo[NL80211_STA_INFO_LLID]) e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]); if (sinfo[NL80211_STA_INFO_PLID]) e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]); if (sinfo[NL80211_STA_INFO_PLINK_STATE]) plink_state_to_str(e->plink_state, nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])); if (sinfo[NL80211_STA_INFO_LOCAL_PM]) power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]); if (sinfo[NL80211_STA_INFO_PEER_PM]) power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]); if (sinfo[NL80211_STA_INFO_NONPEER_PM]) power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]); /* Station flags */ if (sinfo[NL80211_STA_INFO_STA_FLAGS]) { sta_flags = (struct nl80211_sta_flag_update *) nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]); if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) && sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED)) e->is_authorized = 1; if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) && sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) e->is_authenticated = 1; if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) && sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) e->is_preamble_short = 1; if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) && sta_flags->set & BIT(NL80211_STA_FLAG_WME)) e->is_wme = 1; if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) && sta_flags->set & BIT(NL80211_STA_FLAG_MFP)) e->is_mfp = 1; if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) && sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER)) e->is_tdls = 1; } } e->noise = 0; /* filled in by caller */ arr->count++; return NL_SKIP; } static int nl80211_get_survey(const char *ifname, char *buf, int *len) { struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; int rc; rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP, nl80211_get_survey_cb, &arr); if (!rc) *len = (arr.count * sizeof(struct iwinfo_survey_entry)); else *len = 0; return 0; } static int nl80211_get_assoclist(const char *ifname, char *buf, int *len) { DIR *d; int i, noise = 0; struct dirent *de; struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; struct iwinfo_assoclist_entry *e; if ((d = opendir("/sys/class/net")) != NULL) { while ((de = readdir(d)) != NULL) { if (!strncmp(de->d_name, ifname, strlen(ifname)) && (!de->d_name[strlen(ifname)] || !strncmp(&de->d_name[strlen(ifname)], ".sta", 4))) { nl80211_request(de->d_name, NL80211_CMD_GET_STATION, NLM_F_DUMP, nl80211_get_assoclist_cb, &arr); } } closedir(d); if (!nl80211_get_noise(ifname, &noise)) for (i = 0, e = arr.buf; i < arr.count; i++, e++) e->noise = noise; *len = (arr.count * sizeof(struct iwinfo_assoclist_entry)); return 0; } return -1; } static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg) { int *dbm_max = arg; int ch_cur, ch_cmp, bands_remain, freqs_remain; struct nlattr **attr = nl80211_parse(msg); struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; struct nlattr *band, *freq; 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 }, [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 }, }; ch_cur = *dbm_max; /* value int* is initialized with channel by caller */ *dbm_max = -1; nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) { nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), nla_len(band), NULL); nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) { nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, nla_data(freq), nla_len(freq), freq_policy); ch_cmp = nl80211_freq2channel(nla_get_u32( freqs[NL80211_FREQUENCY_ATTR_FREQ])); if ((!ch_cur || (ch_cmp == ch_cur)) && freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) { *dbm_max = (int)(0.01 * nla_get_u32( freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])); break; } } } return NL_SKIP; } static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) { int err, ch_cur; int dbm_max = -1, dbm_cur, dbm_cnt; struct iwinfo_txpwrlist_entry entry; if (nl80211_get_channel(ifname, &ch_cur)) ch_cur = 0; /* initialize the value pointer with channel for callback */ dbm_max = ch_cur; err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, nl80211_get_txpwrlist_cb, &dbm_max); if (!err) { for (dbm_cur = 0, dbm_cnt = 0; dbm_cur < dbm_max; dbm_cur++, dbm_cnt++) { entry.dbm = dbm_cur; entry.mw = iwinfo_dbm2mw(dbm_cur); memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); } entry.dbm = dbm_max; entry.mw = iwinfo_dbm2mw(dbm_max); memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry)); dbm_cnt++; *len = dbm_cnt * sizeof(entry); return 0; } return -1; } static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c) { int wpa_version = 0; char *p, *q, *proto, *suites; c->enabled = 0; for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) { if (!strcmp(p, "WEP")) { c->enabled = 1; c->auth_suites = IWINFO_KMGMT_NONE; c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; break; } proto = strtok(p, "-"); suites = strtok(NULL, "]"); if (!proto || !suites) continue; if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN")) wpa_version = 2; else if (!strcmp(proto, "WPA")) wpa_version = 1; else continue; c->enabled = 1; parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites); parse_wpa_ciphers(suites, &c->pair_ciphers); } } struct nl80211_scanlist { struct iwinfo_scanlist_entry *e; int len; }; static void nl80211_get_scanlist_ie(struct nlattr **bss, struct iwinfo_scanlist_entry *e) { int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]); unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]); static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; int len; while (ielen >= 2 && ielen >= ie[1]) { switch (ie[0]) { case 0: /* SSID */ case 114: /* Mesh ID */ if (e->ssid[0] == 0) { len = min(ie[1], IWINFO_ESSID_MAX_SIZE); memcpy(e->ssid, ie + 2, len); e->ssid[len] = 0; } break; case 48: /* RSN */ iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1], IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x); break; case 221: /* Vendor */ if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1) iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4, IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK); break; case 61: /* HT oeration */ if (ie[1] >= 3) { e->ht_chan_info.primary_chan = ie[2]; e->ht_chan_info.secondary_chan_off = ie[3] & 0x3; e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2; } break; case 192: /* VHT operation */ if (ie[1] >= 3) { e->vht_chan_info.chan_width = ie[2]; e->vht_chan_info.center_chan_1 = ie[3]; e->vht_chan_info.center_chan_2 = ie[4]; } break; } ielen -= ie[1] + 2; ie += ie[1] + 2; } } static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg) { int8_t rssi; uint16_t caps; struct nl80211_scanlist *sl = arg; struct nlattr **tb = nl80211_parse(msg); struct nlattr *bss[NL80211_BSS_MAX + 1]; static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = { [NL80211_BSS_TSF] = { .type = NLA_U64 }, [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 }, [NL80211_BSS_BSSID] = { 0 }, [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 }, [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 }, [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 }, [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 }, [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 }, [NL80211_BSS_STATUS] = { .type = NLA_U32 }, [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 }, [NL80211_BSS_BEACON_IES] = { 0 }, }; if (!tb[NL80211_ATTR_BSS] || nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy) || !bss[NL80211_BSS_BSSID]) { return NL_SKIP; } if (bss[NL80211_BSS_CAPABILITY]) caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]); else caps = 0; memset(sl->e, 0, sizeof(*sl->e)); memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6); if (caps & (1<<1)) sl->e->mode = IWINFO_OPMODE_ADHOC; else if (caps & (1<<0)) sl->e->mode = IWINFO_OPMODE_MASTER; else sl->e->mode = IWINFO_OPMODE_MESHPOINT; if (caps & (1<<4)) sl->e->crypto.enabled = 1; if (bss[NL80211_BSS_FREQUENCY]) { sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]); sl->e->band = nl80211_freq2band(sl->e->mhz); sl->e->channel = nl80211_freq2channel(sl->e->mhz); } if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) nl80211_get_scanlist_ie(bss, sl->e); if (bss[NL80211_BSS_SIGNAL_MBM]) { sl->e->signal = (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100); rssi = sl->e->signal - 0x100; if (rssi < -110) rssi = -110; else if (rssi > -40) rssi = -40; sl->e->quality = (rssi + 110); sl->e->quality_max = 70; } if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version) { sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED; sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104; } sl->e++; sl->len++; return NL_SKIP; } static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len) { struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf }; if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL)) goto out; if (nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED)) goto out; if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP, nl80211_get_scanlist_cb, &sl)) goto out; *len = sl.len * sizeof(struct iwinfo_scanlist_entry); return 0; out: *len = 0; return -1; } static int wpasupp_ssid_decode(const char *in, char *out, int outlen) { #define hex(x) \ (((x) >= 'a') ? ((x) - 'a' + 10) : \ (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0'))) int len = 0; while (*in) { if (len + 1 >= outlen) break; switch (*in) { case '\\': in++; switch (*in) { case 'n': out[len++] = '\n'; in++; break; case 'r': out[len++] = '\r'; in++; break; case 't': out[len++] = '\t'; in++; break; case 'e': out[len++] = '\033'; in++; break; case 'x': if (isxdigit(*(in+1)) && isxdigit(*(in+2))) out[len++] = hex(*(in+1)) * 16 + hex(*(in+2)); in += 3; break; default: out[len++] = *in++; break; } break; default: out[len++] = *in++; break; } } if (outlen > len) out[len] = '\0'; return len; } static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len) { int sock, qmax, rssi, tries, count = -1, ready = 0; char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096]; struct sockaddr_un local = { 0 }; struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; sock = nl80211_wpactl_connect(ifname, &local); if (sock < 0) return sock; send(sock, "ATTACH", 6, 0); send(sock, "SCAN", 4, 0); /* * wait for scan results: * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan * 72 channels at most. We'll also receive two "OK" messages acknowledging * the "ATTACH" and "SCAN" commands and the driver might need a bit extra * time to process the results, so try 72 + 2 + 1 times. */ for (tries = 0; tries < 75; tries++) { if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0) continue; /* got an event notification */ if (reply[0] == '<') { /* scan results are ready */ if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS")) { /* send "SCAN_RESULTS" command */ ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12); break; } /* is another unrelated event, retry */ tries--; } /* scanning already in progress, keep awaiting results */ else if (!strcmp(reply, "FAIL-BUSY\n")) { tries--; } /* another failure, abort */ else if (!strncmp(reply, "FAIL-", 5)) { break; } } /* receive and parse scan results if the wait above didn't time out */ while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0) { /* received an event notification, receive again */ if (reply[0] == '<') continue; nl80211_get_quality_max(ifname, &qmax); for (line = strtok_r(reply, "\n", &pos); line != NULL; line = strtok_r(NULL, "\n", &pos)) { /* skip header line */ if (count < 0) { count++; continue; } bssid = strtok(line, "\t"); freq = strtok(NULL, "\t"); signal = strtok(NULL, "\t"); flags = strtok(NULL, "\t"); ssid = strtok(NULL, "\n"); if (!bssid || !freq || !signal || !flags) continue; /* BSSID */ e->mac[0] = strtol(&bssid[0], NULL, 16); e->mac[1] = strtol(&bssid[3], NULL, 16); e->mac[2] = strtol(&bssid[6], NULL, 16); e->mac[3] = strtol(&bssid[9], NULL, 16); e->mac[4] = strtol(&bssid[12], NULL, 16); e->mac[5] = strtol(&bssid[15], NULL, 16); /* SSID */ if (ssid) wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid)); else e->ssid[0] = 0; /* Mode */ if (strstr(flags, "[MESH]")) e->mode = IWINFO_OPMODE_MESHPOINT; else if (strstr(flags, "[IBSS]")) e->mode = IWINFO_OPMODE_ADHOC; else e->mode = IWINFO_OPMODE_MASTER; /* Channel */ e->mhz = atoi(freq); e->band = nl80211_freq2band(e->mhz); e->channel = nl80211_freq2channel(e->mhz); /* Signal */ rssi = atoi(signal); e->signal = rssi; /* Quality */ if (rssi < 0) { /* The cfg80211 wext compat layer assumes a signal range * of -110 dBm to -40 dBm, the quality value is derived * by adding 110 to the signal level */ if (rssi < -110) rssi = -110; else if (rssi > -40) rssi = -40; e->quality = (rssi + 110); } else { e->quality = rssi; } /* Max. Quality */ e->quality_max = qmax; /* Crypto */ nl80211_get_scancrypto(flags, &e->crypto); count++; e++; } *len = count * sizeof(struct iwinfo_scanlist_entry); break; } close(sock); unlink(local.sun_path); return (count >= 0) ? 0 : -1; } static int nl80211_get_scanlist(const char *ifname, char *buf, int *len) { char *res; int rv, mode; *len = 0; /* Got a radioX pseudo interface, find some interface on it or create one */ if (!strncmp(ifname, "radio", 5)) { /* Reuse existing interface */ if ((res = nl80211_phy2ifname(ifname)) != NULL) { return nl80211_get_scanlist(res, buf, len); } /* Need to spawn a temporary iface for scanning */ else if ((res = nl80211_ifadd(ifname)) != NULL) { rv = nl80211_get_scanlist(res, buf, len); nl80211_ifdel(res); return rv; } } /* WPA supplicant */ if (!nl80211_get_scanlist_wpactl(ifname, buf, len)) { return 0; } /* station / ad-hoc / monitor scan */ else if (!nl80211_get_mode(ifname, &mode) && (mode == IWINFO_OPMODE_ADHOC || mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_CLIENT || mode == IWINFO_OPMODE_MONITOR) && iwinfo_ifup(ifname)) { return nl80211_get_scanlist_nl(ifname, buf, len); } /* AP scan */ else { /* Got a temp interface, don't create yet another one */ if (!strncmp(ifname, "tmp.", 4)) { if (!iwinfo_ifup(ifname)) return -1; rv = nl80211_get_scanlist_nl(ifname, buf, len); iwinfo_ifdown(ifname); return rv; } /* Spawn a new scan interface */ else { if (!(res = nl80211_ifadd(ifname))) return -1; iwinfo_ifmac(res); /* if we can take the new interface up, the driver supports an * additional interface and there's no need to tear down the ap */ if (iwinfo_ifup(res)) { rv = nl80211_get_scanlist_nl(res, buf, len); iwinfo_ifdown(res); } /* driver cannot create secondary interface, take down ap * during scan */ else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) { rv = nl80211_get_scanlist_nl(res, buf, len); iwinfo_ifdown(res); iwinfo_ifup(ifname); nl80211_hostapd_hup(ifname); } else rv = -1; nl80211_ifdel(res); return rv; } } return -1; } static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg) { int bands_remain, freqs_remain; struct nl80211_array_buf *arr = arg; struct iwinfo_freqlist_entry *e; struct nlattr **attr = nl80211_parse(msg); struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1]; struct nlattr *band, *freq; e = arr->buf; e += arr->count; if (attr[NL80211_ATTR_WIPHY_BANDS]) { nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) { nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), nla_len(band), NULL); if (bands[NL80211_BAND_ATTR_FREQS]) { nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain) { nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX, nla_data(freq), nla_len(freq), NULL); if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] || freqs[NL80211_FREQUENCY_ATTR_DISABLED]) continue; e->band = nl80211_get_band(band->nla_type); e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]); e->channel = nl80211_freq2channel(e->mhz); if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS]) e->flags |= IWINFO_FREQ_NO_HT40MINUS; if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS]) e->flags |= IWINFO_FREQ_NO_HT40PLUS; if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ]) e->flags |= IWINFO_FREQ_NO_80MHZ; if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ]) e->flags |= IWINFO_FREQ_NO_160MHZ; if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ]) e->flags |= IWINFO_FREQ_NO_20MHZ; if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ]) e->flags |= IWINFO_FREQ_NO_10MHZ; if (freqs[NL80211_FREQUENCY_ATTR_NO_HE]) e->flags |= IWINFO_FREQ_NO_HE; if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] && !freqs[NL80211_FREQUENCY_ATTR_RADAR]) e->flags |= IWINFO_FREQ_NO_IR; if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY]) e->flags |= IWINFO_FREQ_INDOOR_ONLY; /* keep backwards compatibility */ e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0; e++; arr->count++; } } } } return NL_SKIP; } static int nl80211_get_freqlist(const char *ifname, char *buf, int *len) { struct nl80211_msg_conveyor *cv; struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; uint32_t features = nl80211_get_protocol_features(ifname); int flags; flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); if (!cv) goto out; NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr)) goto out; *len = arr.count * sizeof(struct iwinfo_freqlist_entry); return 0; nla_put_failure: nl80211_free(cv); out: *len = 0; return -1; } static int nl80211_get_country_cb(struct nl_msg *msg, void *arg) { char *buf = arg; struct nlattr **attr = nl80211_parse(msg); if (attr[NL80211_ATTR_REG_ALPHA2]) memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2); else buf[0] = 0; return NL_SKIP; } static int nl80211_get_country(const char *ifname, char *buf) { if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0, nl80211_get_country_cb, buf)) return -1; return 0; } static int nl80211_get_countrylist(const char *ifname, char *buf, int *len) { int count; struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf; const struct iwinfo_iso3166_label *l; for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++) { e->iso3166 = l->iso3166; e->ccode[0] = (l->iso3166 / 256); e->ccode[1] = (l->iso3166 % 256); e->ccode[2] = 0; } *len = (count * sizeof(struct iwinfo_country_entry)); return 0; } struct nl80211_modes { bool ok; uint32_t hw; uint32_t ht; uint8_t bands; uint16_t nl_ht; uint32_t nl_vht; uint16_t he_phy_cap[6]; }; static void nl80211_eval_modelist(struct nl80211_modes *m) { /* Treat any nonzero capability as 11n */ if (m->nl_ht > 0) { m->hw |= IWINFO_80211_N; m->ht |= IWINFO_HTMODE_HT20; if (m->nl_ht & (1 << 1)) m->ht |= IWINFO_HTMODE_HT40; } if (m->he_phy_cap[0] != 0) { m->hw |= IWINFO_80211_AX; m->ht |= IWINFO_HTMODE_HE20; if (m->he_phy_cap[0] & BIT(9)) m->ht |= IWINFO_HTMODE_HE40; if (m->he_phy_cap[0] & BIT(10)) m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80; if (m->he_phy_cap[0] & BIT(11)) m->ht |= IWINFO_HTMODE_HE160; if (m->he_phy_cap[0] & BIT(12)) m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80; } if (m->bands & IWINFO_BAND_24) { m->hw |= IWINFO_80211_B; m->hw |= IWINFO_80211_G; } if (m->bands & IWINFO_BAND_5) { /* Treat any nonzero capability as 11ac */ if (m->nl_vht > 0) { m->hw |= IWINFO_80211_AC; m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80; switch ((m->nl_vht >> 2) & 3) { case 2: m->ht |= IWINFO_HTMODE_VHT80_80; /* fall through */ case 1: m->ht |= IWINFO_HTMODE_VHT160; } } else { m->hw |= IWINFO_80211_A; } } if (m->bands & IWINFO_BAND_60) { m->hw |= IWINFO_80211_AD; } } static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg) { struct nl80211_modes *m = arg; int bands_remain; struct nlattr **attr = nl80211_parse(msg); struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1]; struct nlattr *band; if (attr[NL80211_ATTR_WIPHY_BANDS]) { nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain) { m->bands |= nl80211_get_band(band->nla_type); nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band), nla_len(band), NULL); if (bands[NL80211_BAND_ATTR_HT_CAPA]) m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]); if (bands[NL80211_BAND_ATTR_VHT_CAPA]) m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]); if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) { struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1]; struct nlattr *nl_iftype; int rem_band; int len; nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) { nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX, nla_data(nl_iftype), nla_len(nl_iftype), NULL); if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) { len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]); if (len > sizeof(m->he_phy_cap) - 1) len = sizeof(m->he_phy_cap) - 1; memcpy(&((__u8 *)m->he_phy_cap)[1], nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]), len); } } } } m->ok = 1; } return NL_SKIP; } static int nl80211_get_hwmodelist(const char *ifname, int *buf) { struct nl80211_msg_conveyor *cv; struct nl80211_modes m = {}; uint32_t features = nl80211_get_protocol_features(ifname); int flags; flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); if (!cv) goto out; NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) goto nla_put_failure; nl80211_eval_modelist(&m); *buf = m.hw; return 0; nla_put_failure: nl80211_free(cv); out: return -1; } struct chan_info { int width; int mode; }; static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg) { struct nlattr **tb = nl80211_parse(msg); struct nlattr *cur; struct chan_info *chn = arg; if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH])) chn->width = nla_get_u32(cur); if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE])) chn->mode = nla_get_u32(cur); return NL_SKIP; } static int nl80211_get_htmode(const char *ifname, int *buf) { struct chan_info chn = { 0 }; char *res, b[2] = { 0 }; int err; bool he = false; res = nl80211_phy2ifname(ifname); *buf = 0; err = nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0, nl80211_get_htmode_cb, &chn); if (err) return -1; if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b))) he = b[0] == '1'; else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b))) he = b[0] == '6'; switch (chn.width) { case NL80211_CHAN_WIDTH_20: if (he) *buf = IWINFO_HTMODE_HE20; else if (chn.mode == -1) *buf = IWINFO_HTMODE_VHT20; else *buf = IWINFO_HTMODE_HT20; break; case NL80211_CHAN_WIDTH_40: if (he) *buf = IWINFO_HTMODE_HE40; else if (chn.mode == -1) *buf = IWINFO_HTMODE_VHT40; else *buf = IWINFO_HTMODE_HT40; break; case NL80211_CHAN_WIDTH_80: if (he) *buf = IWINFO_HTMODE_HE80; else *buf = IWINFO_HTMODE_VHT80; break; case NL80211_CHAN_WIDTH_80P80: if (he) *buf = IWINFO_HTMODE_HE80_80; else *buf = IWINFO_HTMODE_VHT80_80; break; case NL80211_CHAN_WIDTH_160: if (he) *buf = IWINFO_HTMODE_HE160; else *buf = IWINFO_HTMODE_VHT160; break; case NL80211_CHAN_WIDTH_5: case NL80211_CHAN_WIDTH_10: case NL80211_CHAN_WIDTH_20_NOHT: *buf = IWINFO_HTMODE_NOHT; break; default: return -1; } return 0; } static int nl80211_get_htmodelist(const char *ifname, int *buf) { struct nl80211_msg_conveyor *cv; struct nl80211_modes m = {}; uint32_t features = nl80211_get_protocol_features(ifname); int flags; flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0; cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags); if (!cv) goto out; NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP); if (nl80211_send(cv, nl80211_get_modelist_cb, &m)) goto nla_put_failure; nl80211_eval_modelist(&m); *buf = m.ht; return 0; nla_put_failure: nl80211_free(cv); out: return -1; } static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg) { struct nlattr **attr = nl80211_parse(msg); struct nlattr *comb; int *ret = arg; int comb_rem, limit_rem, mode_rem; *ret = 0; if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS]) return NL_SKIP; nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem) { static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = { [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED }, [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 }, }; struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1]; static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = { [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED }, [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 }, }; struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1]; struct nlattr *limit; nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy); if (!tb_comb[NL80211_IFACE_COMB_LIMITS]) continue; nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem) { struct nlattr *mode; nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy); if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] || !tb_limit[NL80211_IFACE_LIMIT_MAX]) continue; if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2) continue; nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) { if (nla_type(mode) == NL80211_IFTYPE_AP) *ret = 1; } } } return NL_SKIP; } static int nl80211_get_mbssid_support(const char *ifname, int *buf) { if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0, nl80211_get_ifcomb_cb, buf)) return -1; return 0; } static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname) { char *phy, path[PATH_MAX]; /* Try to determine the phy name from the given interface */ phy = nl80211_ifname2phy(ifname); snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible", phy ? "ieee80211" : "net", phy ? phy : ifname); if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0) return -1; return 0; } static int nl80211_get_hardware_id(const char *ifname, char *buf) { struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf; char *phy, num[8], path[PATH_MAX]; int i; struct { const char *path; uint16_t *dest; } lookup[] = { { "vendor", &id->vendor_id }, { "device", &id->device_id }, { "subsystem_vendor", &id->subsystem_vendor_id }, { "subsystem_device", &id->subsystem_device_id }, { "../idVendor", &id->subsystem_vendor_id }, { "../idProduct", &id->subsystem_device_id } }; memset(id, 0, sizeof(*id)); /* Try to determine the phy name from the given interface */ phy = nl80211_ifname2phy(ifname); for (i = 0; i < ARRAY_SIZE(lookup); i++) { snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s", phy ? "ieee80211" : "net", phy ? phy : ifname, lookup[i].path); if (nl80211_readstr(path, num, sizeof(num)) > 0) *lookup[i].dest = strtoul(num, NULL, 16); } /* Failed to obtain hardware PCI/USB IDs... */ if (id->vendor_id == 0 && id->device_id == 0 && id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0) /* ... first fallback to FDT ... */ if (nl80211_hardware_id_from_fdt(id, ifname) == -1) /* ... then board config */ return iwinfo_hardware_id_from_mtd(id); return 0; } static const struct iwinfo_hardware_entry * nl80211_get_hardware_entry(const char *ifname) { struct iwinfo_hardware_id id; if (nl80211_get_hardware_id(ifname, (char *)&id)) return NULL; return iwinfo_hardware(&id); } static int nl80211_get_hardware_name(const char *ifname, char *buf) { const struct iwinfo_hardware_entry *hw; if (!(hw = nl80211_get_hardware_entry(ifname))) sprintf(buf, "Generic MAC80211"); else sprintf(buf, "%s %s", hw->vendor_name, hw->device_name); return 0; } static int nl80211_get_txpower_offset(const char *ifname, int *buf) { const struct iwinfo_hardware_entry *hw; if (!(hw = nl80211_get_hardware_entry(ifname))) return -1; *buf = hw->txpower_offset; return 0; } static int nl80211_get_frequency_offset(const char *ifname, int *buf) { const struct iwinfo_hardware_entry *hw; if (!(hw = nl80211_get_hardware_entry(ifname))) return -1; *buf = hw->frequency_offset; return 0; } static int nl80211_lookup_phyname(const char *section, char *buf) { const char *name; int idx; if (!strncmp(section, "path=", 5)) idx = nl80211_phy_idx_from_path(section + 5); else if (!strncmp(section, "macaddr=", 8)) idx = nl80211_phy_idx_from_macaddr(section + 8); else idx = nl80211_phy_idx_from_uci(section); if (idx < 0) return -1; name = nl80211_phyidx2name(idx); if (!name) return -1; strcpy(buf, name); return 0; } static int nl80211_phy_path(const char *phyname, const char **path) { if (strchr(phyname, '/')) return -1; *path = nl80211_phy_path_str(phyname); if (!*path) return -1; return 0; } const struct iwinfo_ops nl80211_ops = { .name = "nl80211", .probe = nl80211_probe, .channel = nl80211_get_channel, .center_chan1 = nl80211_get_center_chan1, .center_chan2 = nl80211_get_center_chan2, .frequency = nl80211_get_frequency, .frequency_offset = nl80211_get_frequency_offset, .txpower = nl80211_get_txpower, .txpower_offset = nl80211_get_txpower_offset, .bitrate = nl80211_get_bitrate, .signal = nl80211_get_signal, .noise = nl80211_get_noise, .quality = nl80211_get_quality, .quality_max = nl80211_get_quality_max, .mbssid_support = nl80211_get_mbssid_support, .hwmodelist = nl80211_get_hwmodelist, .htmodelist = nl80211_get_htmodelist, .htmode = nl80211_get_htmode, .mode = nl80211_get_mode, .ssid = nl80211_get_ssid, .bssid = nl80211_get_bssid, .country = nl80211_get_country, .hardware_id = nl80211_get_hardware_id, .hardware_name = nl80211_get_hardware_name, .encryption = nl80211_get_encryption, .phyname = nl80211_get_phyname, .assoclist = nl80211_get_assoclist, .txpwrlist = nl80211_get_txpwrlist, .scanlist = nl80211_get_scanlist, .freqlist = nl80211_get_freqlist, .countrylist = nl80211_get_countrylist, .survey = nl80211_get_survey, .lookup_phy = nl80211_lookup_phyname, .phy_path = nl80211_phy_path, .close = nl80211_close };