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- /*
- * iwinfo - Wireless Information Library - NL80211 Backend
- *
- * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
- *
- * 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 <limits.h>
- #include <glob.h>
- #include <fnmatch.h>
- #include <stdarg.h>
- #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_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 int nl80211_phy_idx_from_uci_path(struct uci_section *s)
- {
- const char *opt;
- char buf[128];
- int idx = -1;
- glob_t gl;
- opt = uci_lookup_option_string(uci_ctx, s, "path");
- if (!opt)
- return -1;
- snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt); /**/
- if (glob(buf, 0, NULL, &gl))
- snprintf(buf, sizeof(buf), "/sys/devices/platform/%s/ieee80211/*/index", opt); /**/
- if (glob(buf, 0, NULL, &gl))
- return -1;
- if (gl.gl_pathc > 0)
- idx = nl80211_readint(gl.gl_pathv[0]);
- globfree(&gl);
- return idx;
- }
- static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
- {
- const char *opt;
- char buf[128];
- int i, idx = -1;
- glob_t gl;
- opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
- 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_uci_phy(struct uci_section *s)
- {
- const char *opt;
- char buf[128];
- opt = uci_lookup_option_string(uci_ctx, s, "phy");
- 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;
- int idx = -1;
- s = iwinfo_uci_get_radio(name, "mac80211");
- if (!s)
- goto free;
- idx = nl80211_phy_idx_from_uci_path(s);
- if (idx < 0)
- idx = nl80211_phy_idx_from_uci_macaddr(s);
- if (idx < 0)
- idx = nl80211_phy_idx_from_uci_phy(s);
- free:
- iwinfo_uci_free();
- return idx;
- }
- static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
- int cmd, int flags)
- {
- int ifidx = -1, phyidx = -1;
- struct nl80211_msg_conveyor *cv;
- if (ifname == NULL)
- return NULL;
- if (nl80211_init() < 0)
- return NULL;
- if (!strncmp(ifname, "phy", 3))
- phyidx = atoi(&ifname[3]);
- else if (!strncmp(ifname, "radio", 5))
- phyidx = nl80211_phy_idx_from_uci(ifname);
- else if (!strncmp(ifname, "mon.", 4))
- ifidx = if_nametoindex(&ifname[4]);
- else
- ifidx = if_nametoindex(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 > -1)
- NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
- 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)
- 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
- return (freq - 5000) / 5;
- }
- static int nl80211_channel2freq(int channel, const char *band)
- {
- if (!band || band[0] != 'a')
- {
- if (channel == 14)
- return 2484;
- else if (channel < 14)
- return (channel * 5) + 2407;
- }
- else
- {
- if (channel >= 182 && channel <= 196)
- return (channel * 5) + 4000;
- else
- return (channel * 5) + 5000;
- }
- return 0;
- }
- static int nl80211_ifname2phy_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_ifname2phy_cb, phy);
- return phy[0] ? phy : NULL;
- }
- static char * nl80211_phy2ifname(const char *ifname)
- {
- int ifidx = -1, cifidx = -1, phyidx = -1;
- char buffer[64];
- 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;
- else if (!strncmp(ifname, "phy", 3))
- phyidx = atoi(&ifname[3]);
- else if (!strncmp(ifname, "radio", 5))
- phyidx = nl80211_phy_idx_from_uci(ifname);
- else
- return NULL;
- memset(nif, 0, sizeof(nif));
- if (phyidx > -1)
- {
- if ((d = opendir("/sys/class/net")) != NULL)
- {
- while ((e = readdir(d)) != NULL)
- {
- snprintf(buffer, sizeof(buffer),
- "/sys/class/net/%s/phy80211/index", e->d_name);
- if (nl80211_readint(buffer) == phyidx)
- {
- snprintf(buffer, sizeof(buffer),
- "/sys/class/net/%s/ifindex", e->d_name);
- if ((cifidx = nl80211_readint(buffer)) >= 0 &&
- ((ifidx < 0) || (cifidx < ifidx)))
- {
- ifidx = cifidx;
- 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/%s",
- ifname, ifname);
- if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
- {
- close(sock);
- return -1;
- }
- if (connect(sock, (struct sockaddr *)&remote, remote_length))
- {
- remote_length = sizeof(remote.sun_family) +
- sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
- 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;
- }
- 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)
- 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;
- int err;
- 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_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);
- 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 = { };
- /* try to find bssid from scan dump results */
- res = nl80211_phy2ifname(ifname);
- 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], hwmode[2];
- /* 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)) == 2)
- {
- *buf = nl80211_channel2freq(atoi(channel), hwmode);
- }
- /* 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_channel(const char *ifname, int *buf)
- {
- if (!nl80211_get_frequency(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 int nl80211_get_encryption(const char *ifname, char *buf)
- {
- char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
- char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
- 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)))
- {
- /* WEP */
- if (!strcmp(wpa_key_mgmt, "NONE"))
- {
- if (strstr(wpa_pairwise, "WEP-40"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP40;
- else if (strstr(wpa_pairwise, "WEP-104"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP104;
- if (strstr(wpa_groupwise, "WEP-40"))
- c->group_ciphers |= IWINFO_CIPHER_WEP40;
- else if (strstr(wpa_groupwise, "WEP-104"))
- c->group_ciphers |= IWINFO_CIPHER_WEP104;
- c->enabled = !!(c->pair_ciphers | c->group_ciphers);
- c->auth_suites |= IWINFO_KMGMT_NONE;
- c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
- }
- /* WPA */
- else if (strstr(wpa_key_mgmt, "WPA"))
- {
- if (strstr(wpa_pairwise, "TKIP"))
- c->pair_ciphers |= IWINFO_CIPHER_TKIP;
- else if (strstr(wpa_pairwise, "CCMP"))
- c->pair_ciphers |= IWINFO_CIPHER_CCMP;
- else if (strstr(wpa_pairwise, "NONE"))
- c->pair_ciphers |= IWINFO_CIPHER_NONE;
- else if (strstr(wpa_pairwise, "WEP-40"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP40;
- else if (strstr(wpa_pairwise, "WEP-104"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP104;
- if (strstr(wpa_groupwise, "TKIP"))
- c->group_ciphers |= IWINFO_CIPHER_TKIP;
- else if (strstr(wpa_groupwise, "CCMP"))
- c->group_ciphers |= IWINFO_CIPHER_CCMP;
- else if (strstr(wpa_groupwise, "NONE"))
- c->group_ciphers |= IWINFO_CIPHER_NONE;
- else if (strstr(wpa_groupwise, "WEP-40"))
- c->group_ciphers |= IWINFO_CIPHER_WEP40;
- else if (strstr(wpa_groupwise, "WEP-104"))
- c->group_ciphers |= IWINFO_CIPHER_WEP104;
- if (strstr(wpa_key_mgmt, "WPA2"))
- c->wpa_version = 2;
- else if (strstr(wpa_key_mgmt, "WPA"))
- c->wpa_version = 1;
- if (strstr(wpa_key_mgmt, "PSK"))
- c->auth_suites |= IWINFO_KMGMT_PSK;
- else if (strstr(wpa_key_mgmt, "EAP") ||
- strstr(wpa_key_mgmt, "802.1X"))
- c->auth_suites |= IWINFO_KMGMT_8021x;
- else if (strstr(wpa_key_mgmt, "NONE"))
- c->auth_suites |= IWINFO_KMGMT_NONE;
- 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 = wpa[0] ? atoi(wpa) : 0;
- if (wpa_key_mgmt[0])
- {
- if (strstr(wpa_key_mgmt, "PSK"))
- c->auth_suites |= IWINFO_KMGMT_PSK;
- if (strstr(wpa_key_mgmt, "EAP"))
- c->auth_suites |= IWINFO_KMGMT_8021x;
- if (strstr(wpa_key_mgmt, "NONE"))
- c->auth_suites |= IWINFO_KMGMT_NONE;
- }
- else
- {
- c->auth_suites |= IWINFO_KMGMT_PSK;
- }
- if (wpa_pairwise[0])
- {
- if (strstr(wpa_pairwise, "TKIP"))
- c->pair_ciphers |= IWINFO_CIPHER_TKIP;
- if (strstr(wpa_pairwise, "CCMP"))
- c->pair_ciphers |= IWINFO_CIPHER_CCMP;
- if (strstr(wpa_pairwise, "NONE"))
- c->pair_ciphers |= IWINFO_CIPHER_NONE;
- }
- 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->group_ciphers = c->pair_ciphers;
- c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 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_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_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_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_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 },
- };
- 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_INACTIVE_TIME])
- e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_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_EXPECTED_THROUGHPUT])
- e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
- /* 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_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 nl80211_msg_conveyor *req;
- 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(const char *spec,
- struct iwinfo_crypto_entry *c)
- {
- if (strstr(spec, "WPA") || strstr(spec, "WEP"))
- {
- c->enabled = 1;
- if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
- c->wpa_version = 3;
- else if (strstr(spec, "WPA2"))
- c->wpa_version = 2;
- else if (strstr(spec, "WPA"))
- c->wpa_version = 1;
- else if (strstr(spec, "WEP"))
- c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
- if (strstr(spec, "PSK"))
- c->auth_suites |= IWINFO_KMGMT_PSK;
- if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
- c->auth_suites |= IWINFO_KMGMT_8021x;
- if (strstr(spec, "WPA-NONE"))
- c->auth_suites |= IWINFO_KMGMT_NONE;
- if (strstr(spec, "TKIP"))
- c->pair_ciphers |= IWINFO_CIPHER_TKIP;
- if (strstr(spec, "CCMP"))
- c->pair_ciphers |= IWINFO_CIPHER_CCMP;
- if (strstr(spec, "WEP-40"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP40;
- if (strstr(spec, "WEP-104"))
- c->pair_ciphers |= IWINFO_CIPHER_WEP104;
- c->group_ciphers = c->pair_ciphers;
- }
- else
- {
- c->enabled = 0;
- }
- }
- 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 */
- 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;
- }
- 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->channel = nl80211_freq2channel(nla_get_u32(
- bss[NL80211_BSS_FREQUENCY]));
- 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--;
- }
- }
- /* 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 || !ssid)
- 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 */
- wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
- /* 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->channel = nl80211_freq2channel(atoi(freq));
- /* 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);
- }
- 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->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
- e->channel = nl80211_freq2channel(e->mhz);
- e->restricted = (
- freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
- !freqs[NL80211_FREQUENCY_ATTR_RADAR]
- ) ? 1 : 0;
- 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;
- 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;
- };
- static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
- {
- struct nl80211_modes *m = arg;
- int bands_remain, freqs_remain;
- uint16_t caps = 0;
- uint32_t vht_caps = 0;
- 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;
- 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_HT_CAPA])
- caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
- /* Treat any nonzero capability as 11n */
- if (caps > 0)
- {
- m->hw |= IWINFO_80211_N;
- m->ht |= IWINFO_HTMODE_HT20;
- if (caps & (1 << 1))
- m->ht |= IWINFO_HTMODE_HT40;
- }
- 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])
- continue;
- if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
- {
- m->hw |= IWINFO_80211_B;
- m->hw |= IWINFO_80211_G;
- }
- else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
- {
- vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
- /* Treat any nonzero capability as 11ac */
- if (vht_caps > 0)
- {
- m->hw |= IWINFO_80211_AC;
- m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
- switch ((vht_caps >> 2) & 3)
- {
- case 2:
- m->ht |= IWINFO_HTMODE_VHT80_80;
- /* fall through */
- case 1:
- m->ht |= IWINFO_HTMODE_VHT160;
- }
- }
- }
- else if (!(m->hw & IWINFO_80211_AC))
- {
- m->hw |= IWINFO_80211_A;
- }
- }
- }
- m->ok = 1;
- }
- return NL_SKIP;
- }
- static int nl80211_get_hwmodelist(const char *ifname, int *buf)
- {
- struct nl80211_modes m = { 0 };
- if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
- nl80211_get_modelist_cb, &m))
- goto out;
- if (!m.ok)
- goto out;
- *buf = m.hw;
- return 0;
- out:
- *buf = 0;
- return -1;
- }
- static int nl80211_get_htmodelist(const char *ifname, int *buf)
- {
- struct nl80211_modes m = { 0 };
- if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
- nl80211_get_modelist_cb, &m))
- goto out;
- if (!m.ok)
- goto out;
- *buf = m.ht;
- return 0;
- out:
- *buf = 0;
- 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_get_hardware_id(const char *ifname, char *buf)
- {
- int rv = -1;
- char *res;
- /* 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)
- {
- rv = wext_ops.hardware_id(res, buf);
- }
- /* Need to spawn a temporary iface for finding IDs */
- else if ((res = nl80211_ifadd(ifname)) != NULL)
- {
- rv = wext_ops.hardware_id(res, buf);
- nl80211_ifdel(res);
- }
- }
- else
- {
- rv = wext_ops.hardware_id(ifname, buf);
- }
- /* Failed to obtain hardware IDs, search board config */
- if (rv)
- {
- rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
- }
- return rv;
- }
- 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)
- {
- int idx;
- if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
- return -1;
- sprintf(buf, "phy%d", idx);
- return 0;
- }
- const struct iwinfo_ops nl80211_ops = {
- .name = "nl80211",
- .probe = nl80211_probe,
- .channel = nl80211_get_channel,
- .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,
- .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,
- .lookup_phy = nl80211_lookup_phyname,
- .close = nl80211_close
- };
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