diff options
Diffstat (limited to 'package/iwinfo/src/iwinfo_nl80211.c')
| -rw-r--r-- | package/iwinfo/src/iwinfo_nl80211.c | 1630 |
1 files changed, 1630 insertions, 0 deletions
diff --git a/package/iwinfo/src/iwinfo_nl80211.c b/package/iwinfo/src/iwinfo_nl80211.c new file mode 100644 index 000000000..b3da8384e --- /dev/null +++ b/package/iwinfo/src/iwinfo_nl80211.c @@ -0,0 +1,1630 @@ +/* + * iwinfo - Wireless Information Library - NL80211 Backend + * + * Copyright (C) 2010 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 "iwinfo/nl80211.h" +#include "iwinfo/wext.h" + +#define min(x, y) ((x) < (y)) ? (x) : (y) + +static struct nl80211_state *nls = NULL; + +static int nl80211_init(void) +{ + int err, fd; + + if (!nls) + { + nls = malloc(sizeof(struct nl80211_state)); + if (!nls) { + err = -ENOMEM; + goto err; + } + + 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; + } + } + + return 0; + + +err: + nl80211_close(); + return err; +} + +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_msg(const char *ifname, int cmd, int flags) +{ + static struct nl80211_msg_conveyor cv; + + int ifidx = -1, phyidx = -1; + struct nl_msg *req = NULL; + struct nl_cb *cb = NULL; + + if (nl80211_init() < 0) + goto err; + + if (!strncmp(ifname, "phy", 3)) + phyidx = atoi(&ifname[3]); + else if (!strncmp(ifname, "radio", 5)) + phyidx = atoi(&ifname[5]); + else if (!strncmp(ifname, "mon.", 4)) + ifidx = if_nametoindex(&ifname[4]); + else + ifidx = if_nametoindex(ifname); + + if ((ifidx < 0) && (phyidx < 0)) + return 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(nls->nl80211), 0, + flags, cmd, 0); + + if (ifidx > -1) + NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx); + + if (phyidx > -1) + NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx); + + cv.msg = req; + cv.cb = cb; + + return &cv; + +err: +nla_put_failure: + if (cb) + nl_cb_put(cb); + + if (req) + nlmsg_free(req); + + return NULL; +} + +static struct nl80211_msg_conveyor * 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 = 1; + + 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); + + if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0) + goto err; + + 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); + + return &rcv; + +err: + nl_cb_put(cv->cb); + nlmsg_free(cv->msg); + + return NULL; +} + +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_freq2channel(int freq) +{ + if (freq == 2484) + return 14; + + if (freq < 2484) + return (freq - 2407) / 5; + + return (freq / 5) - 1000; +} + +static char * nl80211_getval(const char *ifname, const char *buf, const char *key) +{ + int i, len; + char lkey[64] = { 0 }; + const char *ln = buf; + static char lval[256] = { 0 }; + + int matched_if = ifname ? 0 : 1; + + + for( i = 0, len = strlen(buf); i < len; i++ ) + { + if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t')) + { + ln++; + } + else if (!lkey[0] && (buf[i] == '=')) + { + if ((&buf[i] - ln) > 0) + memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln)); + } + else if (buf[i] == '\n') + { + if (lkey[0]) + { + memcpy(lval, ln + strlen(lkey) + 1, + min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1)); + + if ((ifname != NULL) && + (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) ) + { + matched_if = !strcmp(lval, ifname); + } + else if (matched_if && !strcmp(lkey, key)) + { + return lval; + } + } + + ln = &buf[i+1]; + memset(lkey, 0, sizeof(lkey)); + memset(lval, 0, sizeof(lval)); + } + } + + return NULL; +} + +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]) + sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME])); + else + buf[0] = 0; + + return NL_SKIP; +} + +static char * nl80211_ifname2phy(const char *ifname) +{ + static char phy[32] = { 0 }; + struct nl80211_msg_conveyor *req; + + memset(phy, 0, sizeof(phy)); + + req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0); + if (req) + { + nl80211_send(req, nl80211_ifname2phy_cb, phy); + nl80211_free(req); + } + + return phy[0] ? phy : NULL; +} + +static char * nl80211_hostapd_info(const char *ifname) +{ + char *phy; + char path[32] = { 0 }; + static char buf[4096] = { 0 }; + FILE *conf; + + if ((phy = nl80211_ifname2phy(ifname)) != NULL) + { + snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy); + + if ((conf = fopen(path, "r")) != NULL) + { + fread(buf, sizeof(buf) - 1, 1, conf); + fclose(conf); + + return buf; + } + } + + return NULL; +} + +static inline int nl80211_wpactl_recv(int sock, char *buf, int blen) +{ + fd_set rfds; + struct timeval tv = { 2, 0 }; + + 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, 0); +} + +static char * nl80211_wpactl_info(const char *ifname, const char *cmd, + const char *event) +{ + int numtry = 0; + int sock = -1; + char *rv = NULL; + size_t remote_length, local_length; + static char buffer[10240] = { 0 }; + + struct sockaddr_un local = { 0 }; + struct sockaddr_un remote = { 0 }; + + + sock = socket(PF_UNIX, SOCK_DGRAM, 0); + if (sock < 0) + return NULL; + + 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) + goto out; + + if (connect(sock, (struct sockaddr *) &remote, remote_length)) + goto out; + + 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)) + goto out; + + + send(sock, "ATTACH", 6, 0); + + if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0) + goto out; + + + send(sock, cmd, strlen(cmd), 0); + + while( numtry++ < 5 ) + { + if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0) + { + if (event) + continue; + + break; + } + + if ((!event && buffer[0] != '<') || strstr(buffer, event)) + break; + } + + rv = buffer; + +out: + close(sock); + + if (local.sun_family) + unlink(local.sun_path); + + return rv; +} + +static inline 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 char * nl80211_phy2ifname(const char *ifname) +{ + int fd, ifidx = -1, cifidx = -1, phyidx = -1; + char buffer[64]; + static char nif[IFNAMSIZ] = { 0 }; + + DIR *d; + struct dirent *e; + + if (!ifname) + return NULL; + else if (!strncmp(ifname, "phy", 3)) + phyidx = atoi(&ifname[3]); + else if (!strncmp(ifname, "radio", 5)) + phyidx = atoi(&ifname[5]); + + 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)); + } + } + } + + closedir(d); + } + } + + return nif[0] ? nif : NULL; +} + +static char * nl80211_ifadd(const char *ifname) +{ + int phyidx; + char *rv = NULL; + static char nif[IFNAMSIZ] = { 0 }; + struct nl80211_msg_conveyor *req, *res; + + 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); + + rv = nif; + + nla_put_failure: + nl80211_free(req); + } + + return rv; +} + +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); + + 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); + } +} + + +int nl80211_probe(const char *ifname) +{ + return !!nl80211_ifname2phy(ifname); +} + +void nl80211_close(void) +{ + if (nls) + { + if (nls->nl_sock) + nl_socket_free(nls->nl_sock); + + if (nls->nl_cache) + nl_cache_free(nls->nl_cache); + + free(nls); + nls = NULL; + } +} + +int nl80211_get_mode(const char *ifname, char *buf) +{ + return wext_get_mode(ifname, buf); +} + +int nl80211_get_ssid(const char *ifname, char *buf) +{ + char *ssid; + + if (!wext_get_ssid(ifname, buf)) + { + return 0; + } + else if( (ssid = nl80211_hostapd_info(ifname)) && + (ssid = nl80211_getval(ifname, ssid, "ssid")) ) + { + memcpy(buf, ssid, strlen(ssid)); + return 0; + } + + return -1; +} + +int nl80211_get_bssid(const char *ifname, char *buf) +{ + char *bssid; + unsigned char mac[6]; + + if (!wext_get_bssid(ifname, buf)) + { + return 0; + } + else if((bssid = nl80211_hostapd_info(ifname)) && + (bssid = nl80211_getval(ifname, bssid, "bssid"))) + { + mac[0] = strtol(&bssid[0], NULL, 16); + mac[1] = strtol(&bssid[3], NULL, 16); + mac[2] = strtol(&bssid[6], NULL, 16); + mac[3] = strtol(&bssid[9], NULL, 16); + mac[4] = strtol(&bssid[12], NULL, 16); + mac[5] = strtol(&bssid[15], NULL, 16); + + sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); + + return 0; + } + + return -1; +} + +int nl80211_get_channel(const char *ifname, int *buf) +{ + char *first; + + if (!wext_get_channel(ifname, buf)) + return 0; + + else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL) + return wext_get_channel(first, buf); + + return -1; +} + +int nl80211_get_frequency(const char *ifname, int *buf) +{ + char *first; + + if (!wext_get_frequency(ifname, buf)) + return 0; + + else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL) + return wext_get_frequency(first, buf); + + return -1; +} + +int nl80211_get_txpower(const char *ifname, int *buf) +{ + return wext_get_txpower(ifname, buf); +} + + +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 ? (int8_t)((rr->rssi + dbm) / 2) : dbm; + } + + 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 + ? (int16_t)((rr->rate + mbit) / 2) : mbit; + } + } + } + } + } + + return NL_SKIP; +} + +static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r) +{ + DIR *d; + struct dirent *de; + struct nl80211_msg_conveyor *req; + + r->rssi = 0; + r->rate = 0; + + 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))) + { + req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION, + NLM_F_DUMP); + + if (req) + { + nl80211_send(req, nl80211_fill_signal_cb, r); + nl80211_free(req); + } + } + } + + closedir(d); + } +} + +int nl80211_get_bitrate(const char *ifname, int *buf) +{ + struct nl80211_rssi_rate rr; + + if (!wext_get_bitrate(ifname, buf)) + return 0; + + nl80211_fill_signal(ifname, &rr); + + if (rr.rate) + { + *buf = (rr.rate * 100); + return 0; + } + + return -1; +} + +int nl80211_get_signal(const char *ifname, int *buf) +{ + struct nl80211_rssi_rate rr; + + if (!wext_get_signal(ifname, buf)) + return 0; + + nl80211_fill_signal(ifname, &rr); + + if (rr.rssi) + { + *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; +} + + +int nl80211_get_noise(const char *ifname, int *buf) +{ + int8_t noise; + struct nl80211_msg_conveyor *req; + + req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP); + if (req) + { + noise = 0; + + nl80211_send(req, nl80211_get_noise_cb, &noise); + nl80211_free(req); + + if (noise) + { + *buf = noise; + return 0; + } + } + + return -1; +} + +int nl80211_get_quality(const char *ifname, int *buf) +{ + int signal; + + if (wext_get_quality(ifname, buf)) + { + *buf = 0; + + 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; +} + +int nl80211_get_quality_max(const char *ifname, int *buf) +{ + if (wext_get_quality_max(ifname, buf)) + /* The cfg80211 wext compat layer assumes a maximum + * quality of 70 */ + *buf = 70; + + return 0; +} + +int nl80211_get_encryption(const char *ifname, char *buf) +{ + int i; + char k[9]; + char *val, *res; + struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf; + + /* WPA supplicant */ + if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) && + (val = nl80211_getval(NULL, res, "pairwise_cipher")) ) + { + /* WEP */ + if (strstr(val, "WEP")) + { + if (strstr(val, "WEP-40")) + c->pair_ciphers |= IWINFO_CIPHER_WEP40; + + else if (strstr(val, "WEP-104")) + c->pair_ciphers |= IWINFO_CIPHER_WEP104; + + c->enabled = 1; + c->group_ciphers = c->pair_ciphers; + + c->auth_suites |= IWINFO_KMGMT_NONE; + c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */ + } + + /* WPA */ + else + { + if (strstr(val, "TKIP")) + c->pair_ciphers |= IWINFO_CIPHER_TKIP; + + else if (strstr(val, "CCMP")) + c->pair_ciphers |= IWINFO_CIPHER_CCMP; + + else if (strstr(val, "NONE")) + c->pair_ciphers |= IWINFO_CIPHER_NONE; + + else if (strstr(val, "WEP-40")) + c->pair_ciphers |= IWINFO_CIPHER_WEP40; + + else if (strstr(val, "WEP-104")) + c->pair_ciphers |= IWINFO_CIPHER_WEP104; + + + if ((val = nl80211_getval(NULL, res, "group_cipher"))) + { + if (strstr(val, "TKIP")) + c->group_ciphers |= IWINFO_CIPHER_TKIP; + + else if (strstr(val, "CCMP")) + c->group_ciphers |= IWINFO_CIPHER_CCMP; + + else if (strstr(val, "NONE")) + c->group_ciphers |= IWINFO_CIPHER_NONE; + + else if (strstr(val, "WEP-40")) + c->group_ciphers |= IWINFO_CIPHER_WEP40; + + else if (strstr(val, "WEP-104")) + c->group_ciphers |= IWINFO_CIPHER_WEP104; + } + + + if ((val = nl80211_getval(NULL, res, "key_mgmt"))) + { + if (strstr(val, "WPA2")) + c->wpa_version = 2; + + else if (strstr(val, "WPA")) + c->wpa_version = 1; + + + if (strstr(val, "PSK")) + c->auth_suites |= IWINFO_KMGMT_PSK; + + else if (strstr(val, "EAP") || strstr(val, "802.1X")) + c->auth_suites |= IWINFO_KMGMT_8021x; + + else if (strstr(val, "NONE")) + c->auth_suites |= IWINFO_KMGMT_NONE; + } + + c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0; + } + + return 0; + } + + /* Hostapd */ + else if ((res = nl80211_hostapd_info(ifname))) + { + if ((val = nl80211_getval(ifname, res, "wpa")) != NULL) + c->wpa_version = atoi(val); + + val = nl80211_getval(ifname, res, "wpa_key_mgmt"); + + if (!val || strstr(val, "PSK")) + c->auth_suites |= IWINFO_KMGMT_PSK; + + if (val && strstr(val, "EAP")) + c->auth_suites |= IWINFO_KMGMT_8021x; + + if (val && strstr(val, "NONE")) + c->auth_suites |= IWINFO_KMGMT_NONE; + + if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL) + { + if (strstr(val, "TKIP")) + c->pair_ciphers |= IWINFO_CIPHER_TKIP; + + if (strstr(val, "CCMP")) + c->pair_ciphers |= IWINFO_CIPHER_CCMP; + + if (strstr(val, "NONE")) + c->pair_ciphers |= IWINFO_CIPHER_NONE; + } + + if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL) + { + switch(atoi(val)) { + 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; + + default: + break; + } + + for( i = 0; i < 4; i++ ) + { + snprintf(k, sizeof(k), "wep_key%d", i); + + if ((val = nl80211_getval(ifname, res, k))) + { + if ((strlen(val) == 5) || (strlen(val) == 10)) + c->pair_ciphers |= IWINFO_CIPHER_WEP40; + + else if ((strlen(val) == 13) || (strlen(val) == 26)) + c->pair_ciphers |= IWINFO_CIPHER_WEP104; + } + } + } + + c->group_ciphers = c->pair_ciphers; + c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0; + + return 0; + } + + return -1; +} + + +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]; + + 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 }, + }; + + /* advance to end of array */ + e += arr->count; + + if (attr[NL80211_ATTR_MAC]) + memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6); + + 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]) + e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]); + } + } + + e->noise = 0; /* filled in by caller */ + arr->count++; + + return NL_SKIP; +} + +int nl80211_get_assoclist(const char *ifname, char *buf, int *len) +{ + DIR *d; + int i, noise = 0; + struct dirent *de; + struct nl80211_msg_conveyor *req; + 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))) + { + req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION, + NLM_F_DUMP); + + if (req) + { + nl80211_send(req, nl80211_get_assoclist_cb, &arr); + nl80211_free(req); + } + + break; + } + } + + 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; +} + +int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len) +{ + int 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; + + req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0); + if (req) + { + /* initialize the value pointer with channel for callback */ + dbm_max = ch_cur; + + nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max); + nl80211_free(req); + } + + if (dbm_max > -1) + { + 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; + } +} + +int nl80211_get_scanlist(const char *ifname, char *buf, int *len) +{ + int freq, rssi, qmax, count; + char *res; + char ssid[128] = { 0 }; + char bssid[18] = { 0 }; + char cipher[256] = { 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) + { + count = nl80211_get_scanlist(res, buf, len); + nl80211_ifdel(res); + return count; + } + } + + struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf; + + /* WPA supplicant */ + if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS"))) + { + if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL))) + { + nl80211_get_quality_max(ifname, &qmax); + + /* skip header line */ + while( *res++ != '\n' ); + + count = 0; + + while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n", + bssid, &freq, &rssi, cipher, ssid) > 0 ) + { + /* 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 */ + memcpy(e->ssid, ssid, + min(strlen(ssid), sizeof(e->ssid) - 1)); + + /* Mode (assume master) */ + sprintf((char *)e->mode, "Master"); + + /* Channel */ + e->channel = nl80211_freq2channel(freq); + + /* 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(cipher, &e->crypto); + + /* advance to next line */ + while( *res && *res++ != '\n' ); + + count++; + e++; + + memset(ssid, 0, sizeof(ssid)); + memset(bssid, 0, sizeof(bssid)); + memset(cipher, 0, sizeof(cipher)); + } + + *len = count * sizeof(struct iwinfo_scanlist_entry); + return 0; + } + } + + /* AP scan */ + else + { + /* Got a temp interface, don't create yet another one */ + if (!strncmp(ifname, "tmp.", 4)) + { + if (!iwinfo_ifup(ifname)) + return -1; + + wext_get_scanlist(ifname, buf, len); + iwinfo_ifdown(ifname); + return 0; + } + + /* Spawn a new scan interface */ + else + { + if (!(res = nl80211_ifadd(ifname))) + goto out; + + if (!iwinfo_ifmac(res)) + goto out; + + /* 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)) + { + wext_get_scanlist(res, buf, len); + iwinfo_ifdown(res); + } + + /* driver cannot create secondary interface, take down ap + * during scan */ + else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res)) + { + wext_get_scanlist(res, buf, len); + iwinfo_ifdown(res); + iwinfo_ifup(ifname); + nl80211_hostapd_hup(ifname); + } + + out: + nl80211_ifdel(res); + return 0; + } + } + + 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 = arr->buf; + + 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 }, + }; + + 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), 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_PASSIVE_SCAN] || + freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] || + freqs[NL80211_FREQUENCY_ATTR_RADAR] + ) ? 1 : 0; + + e++; + arr->count++; + } + } + + return NL_SKIP; +} + +int nl80211_get_freqlist(const char *ifname, char *buf, int *len) +{ + struct nl80211_msg_conveyor *req; + struct nl80211_array_buf arr = { .buf = buf, .count = 0 }; + + req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0); + if (req) + { + nl80211_send(req, nl80211_get_freqlist_cb, &arr); + nl80211_free(req); + } + + if (arr.count > 0) + { + *len = arr.count * sizeof(struct iwinfo_freqlist_entry); + return 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; +} + +int nl80211_get_country(const char *ifname, char *buf) +{ + int rv = -1; + struct nl80211_msg_conveyor *req; + + req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0); + if (req) + { + nl80211_send(req, nl80211_get_country_cb, buf); + nl80211_free(req); + + if (buf[0]) + rv = 0; + } + + return rv; +} + +int nl80211_get_countrylist(const char *ifname, char *buf, int *len) +{ + int i, 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); + } + + *len = (count * sizeof(struct iwinfo_country_entry)); + return 0; +} + +static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg) +{ + int *modes = arg; + int bands_remain, freqs_remain; + uint16_t 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; + + *modes = 0; + + 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) + *modes |= IWINFO_80211_N; + + 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) + { + *modes |= IWINFO_80211_B; + *modes |= IWINFO_80211_G; + } + else + { + *modes |= IWINFO_80211_A; + } + } + } + } + + return NL_SKIP; +} + +int nl80211_get_hwmodelist(const char *ifname, int *buf) +{ + struct nl80211_msg_conveyor *req; + + req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0); + if (req) + { + nl80211_send(req, nl80211_get_hwmodelist_cb, buf); + nl80211_free(req); + } + + return *buf ? 0 : -1; +} + +int nl80211_get_mbssid_support(const char *ifname, int *buf) +{ + /* Test whether we can create another interface */ + char *nif = nl80211_ifadd(ifname); + + if (nif) + { + *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif)); + + iwinfo_ifdown(nif); + nl80211_ifdel(nif); + + return 0; + } + + return -1; +} |