#include <limits.h>
#include <glob.h>
#include <fnmatch.h>
+#include <stdarg.h>
+
#include "iwinfo_nl80211.h"
#define min(x, y) ((x) < (y)) ? (x) : (y)
return 0;
}
-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;
return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
}
-static char * nl80211_hostapd_info(const char *ifname)
+static int __nl80211_hostapd_query(const char *ifname, ...)
{
- int mode;
- char *phy;
- char path[32] = { 0 };
- static char buf[4096] = { 0 };
- FILE *conf;
+ 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 NULL;
+ return 0;
+
+ if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
+ return 0;
+
+ phy = nl80211_ifname2phy(ifname);
+
+ if (!phy)
+ return 0;
- if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
- (phy = nl80211_ifname2phy(ifname)) != NULL)
+ 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))
{
- snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
+ 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);
- if ((conf = fopen(path, "r")) != NULL)
+ while ((search = va_arg(ap_cur, char *)) != NULL)
{
- fread(buf, sizeof(buf) - 1, 1, conf);
- fclose(conf);
+ dest = va_arg(ap_cur, char *);
+ len = va_arg(ap_cur, int);
- return buf;
+ if (!strcmp(search, key))
+ {
+ strncpy(dest, val, len - 1);
+ found++;
+ break;
+ }
}
+
+ va_end(ap_cur);
}
- return NULL;
+ 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 = { 2, 0 };
+ 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, 0);
+ return recv(sock, buf, blen - 1, 0);
}
-static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
- const char *event)
+static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
{
- 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 };
+ size_t remote_length, local_length;
-
- sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+ int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
if (sock < 0)
- return NULL;
+ 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);
+ 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;
+ {
+ close(sock);
+ return -1;
+ }
- if (connect(sock, (struct sockaddr *) &remote, remote_length))
+ if (connect(sock, (struct sockaddr *)&remote, remote_length))
{
- remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
- "/var/run/wpa_supplicant/%s", ifname);
+ 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;
+ }
+ }
- 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) < 0)
+ {
+ 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());
+ return sock;
+}
- if (bind(sock, (struct sockaddr *) &local, local_length))
- goto out;
+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 (event)
+ 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)
{
- send(sock, "ATTACH", 6, 0);
+ dest = va_arg(ap_cur, char *);
+ len = va_arg(ap_cur, int);
- if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
- goto out;
+ memset(dest, 0, len);
}
+ va_end(ap_cur);
- send(sock, cmd, strlen(cmd), 0);
+ send(sock, "STATUS", 6, 0);
- /* we might have to scan up to 72 channels / 256ms per channel */
- /* this makes up to 18.5s hence 10 tries */
- while( numtry++ < 10 )
+ while (true)
{
- char *bracket;
+ if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
+ break;
+
+ if (buf[0] == '<')
+ continue;
- /* make sure there is a terminating nul byte */
- if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
+ for (line = strtok_r(buf, "\n", &pos);
+ line != NULL;
+ line = strtok_r(NULL, "\n", &pos))
{
- if (event)
+ key = strtok(line, "=");
+ val = strtok(NULL, "\n");
+
+ if (!key || !val)
continue;
- break;
- }
+ va_copy(ap_cur, ap);
- if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
- break;
+ 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);
+ }
- /* there may be more than max(numtry) BSS-ADDED events */
- /* ignore them similar to wpa_cli */
- if (buffer[0] == '<' &&
- (bracket=strchr(buffer,'>')) != NULL &&
- strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
- numtry--;
+ break;
}
- rv = buffer;
+ va_end(ap);
-out:
close(sock);
+ unlink(local.sun_path);
- if (local.sun_family)
- unlink(local.sun_path);
-
- return rv;
+ return found;
}
+#define nl80211_wpactl_query(ifname, ...) \
+ __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
+
+
static char * nl80211_ifadd(const char *ifname)
{
int phyidx;
}
/* failed, try to find from hostapd info */
- if ((*buf == 0) &&
- (res = nl80211_hostapd_info(ifname)) &&
- (res = nl80211_getval(ifname, res, "ssid")))
- {
- memcpy(buf, res, strlen(res));
- }
+ if (*buf == 0)
+ nl80211_hostapd_query(ifname, "ssid", buf, IWINFO_ESSID_MAX_SIZE + 1);
return (*buf == 0) ? -1 : 0;
}
static int nl80211_get_bssid(const char *ifname, char *buf)
{
- char *res;
+ char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
struct nl80211_msg_conveyor *req;
struct nl80211_ssid_bssid sb;
/* failed, try to find mac from hostapd info */
if ((sb.bssid[0] == 0) &&
- (res = nl80211_hostapd_info(ifname)) &&
- (res = nl80211_getval(ifname, res, "bssid")))
+ nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
{
sb.bssid[0] = 1;
- sb.bssid[1] = strtol(&res[0], NULL, 16);
- sb.bssid[2] = strtol(&res[3], NULL, 16);
- sb.bssid[3] = strtol(&res[6], NULL, 16);
- sb.bssid[4] = strtol(&res[9], NULL, 16);
- sb.bssid[5] = strtol(&res[12], NULL, 16);
- sb.bssid[6] = strtol(&res[15], NULL, 16);
+ 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])
static int nl80211_get_frequency(const char *ifname, int *buf)
{
- int chn;
- char *res, *channel;
+ char *res, channel[4], hwmode[2];
struct nl80211_msg_conveyor *req;
/* try to find frequency from interface info */
/* failed, try to find frequency from hostapd info */
if ((*buf == 0) &&
- (res = nl80211_hostapd_info(ifname)) &&
- (channel = nl80211_getval(NULL, res, "channel")))
+ nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
+ "channel", channel, sizeof(channel)) == 2)
{
- chn = atoi(channel);
- *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
+ *buf = nl80211_channel2freq(atoi(channel), hwmode);
}
- else
+
+ /* failed, try to find frequency from scan results */
+ if (*buf == 0)
{
- /* failed, try to find frequency from scan results */
- if (*buf == 0)
- {
- res = nl80211_phy2ifname(ifname);
- req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
- NLM_F_DUMP);
+ res = nl80211_phy2ifname(ifname);
+ req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
- if (req)
- {
- nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
- nl80211_free(req);
- }
+ if (req)
+ {
+ nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
+ nl80211_free(req);
}
}
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)
{
- int i;
- char k[9];
- char *val, *res;
+ 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 ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
- (val = nl80211_getval(NULL, res, "pairwise_cipher")))
+ 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 (strstr(val, "WEP"))
+ if (!strcmp(wpa_key_mgmt, "NONE"))
{
- if (strstr(val, "WEP-40"))
+ if (strstr(wpa_pairwise, "WEP-40"))
c->pair_ciphers |= IWINFO_CIPHER_WEP40;
-
- else if (strstr(val, "WEP-104"))
+ else if (strstr(wpa_pairwise, "WEP-104"))
c->pair_ciphers |= IWINFO_CIPHER_WEP104;
- c->enabled = 1;
- c->group_ciphers = c->pair_ciphers;
+ 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
+ else if (strstr(wpa_key_mgmt, "WPA"))
{
- if (strstr(val, "TKIP"))
+ if (strstr(wpa_pairwise, "TKIP"))
c->pair_ciphers |= IWINFO_CIPHER_TKIP;
-
- else if (strstr(val, "CCMP"))
+ else if (strstr(wpa_pairwise, "CCMP"))
c->pair_ciphers |= IWINFO_CIPHER_CCMP;
-
- else if (strstr(val, "NONE"))
+ else if (strstr(wpa_pairwise, "NONE"))
c->pair_ciphers |= IWINFO_CIPHER_NONE;
-
- else if (strstr(val, "WEP-40"))
+ else if (strstr(wpa_pairwise, "WEP-40"))
c->pair_ciphers |= IWINFO_CIPHER_WEP40;
-
- else if (strstr(val, "WEP-104"))
+ else if (strstr(wpa_pairwise, "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;
+ 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 ((res = nl80211_hostapd_info(ifname)))
- {
- if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
- c->wpa_version = atoi(val);
+ 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;
- val = nl80211_getval(ifname, res, "wpa_key_mgmt");
+ if (strstr(wpa_key_mgmt, "EAP"))
+ c->auth_suites |= IWINFO_KMGMT_8021x;
- if (!val || strstr(val, "PSK"))
+ if (strstr(wpa_key_mgmt, "NONE"))
+ c->auth_suites |= IWINFO_KMGMT_NONE;
+ }
+ else
+ {
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 (wpa_pairwise[0])
{
- if (strstr(val, "TKIP"))
+ if (strstr(wpa_pairwise, "TKIP"))
c->pair_ciphers |= IWINFO_CIPHER_TKIP;
- if (strstr(val, "CCMP"))
+ if (strstr(wpa_pairwise, "CCMP"))
c->pair_ciphers |= IWINFO_CIPHER_CCMP;
- if (strstr(val, "NONE"))
+ if (strstr(wpa_pairwise, "NONE"))
c->pair_ciphers |= IWINFO_CIPHER_NONE;
}
- if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
+ if (auth_algs[0])
{
- 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++)
+ switch(atoi(auth_algs))
{
- snprintf(k, sizeof(k), "wep_key%d", i);
+ case 1:
+ c->auth_algs |= IWINFO_AUTH_OPEN;
+ break;
- if ((val = nl80211_getval(ifname, res, k)))
- {
- if ((strlen(val) == 5) || (strlen(val) == 10))
- c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+ case 2:
+ c->auth_algs |= IWINFO_AUTH_SHARED;
+ break;
- else if ((strlen(val) == 13) || (strlen(val) == 26))
- c->pair_ciphers |= IWINFO_CIPHER_WEP104;
- }
+ 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;
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 */
+ if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
+ {
+ 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);
+ }
+
+ close(sock);
+ unlink(local.sun_path);
+
+ return (count >= 0) ? 0 : -1;
+}
+
static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
{
- int freq, rssi, qmax, count, mode;
char *res;
- char ssid[129] = { 0 };
- char bssid[18] = { 0 };
- char cipher[256] = { 0 };
+ int rv, mode;
+
+ *len = 0;
/* Got a radioX pseudo interface, find some interface on it or create one */
if (!strncmp(ifname, "radio", 5))
/* Need to spawn a temporary iface for scanning */
else if ((res = nl80211_ifadd(ifname)) != NULL)
{
- count = nl80211_get_scanlist(res, buf, len);
+ rv = nl80211_get_scanlist(res, buf, len);
nl80211_ifdel(res);
- return count;
+ return rv;
}
}
- struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
-
/* WPA supplicant */
- if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
+ if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
{
- if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
- {
- nl80211_get_quality_max(ifname, &qmax);
-
- count = -1;
-
- do {
- if (res[0] == '<')
- {
- /* skip log lines */
- goto nextline;
- }
- if (count < 0)
- {
- /* skip header line */
- count++;
- goto nextline;
- }
- if (sscanf(res, "%17s %d %d %255s%*[ \t]%128[^\n]\n",
- bssid, &freq, &rssi, cipher, ssid) < 5)
- {
- /* skip malformed lines */
- goto nextline;
- }
- /* 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 (assume master) */
- if (strstr(cipher,"[MESH]"))
- e->mode = IWINFO_OPMODE_MESHPOINT;
- else
- e->mode = IWINFO_OPMODE_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);
-
- count++;
- e++;
-
- memset(ssid, 0, sizeof(ssid));
- memset(bssid, 0, sizeof(bssid));
- memset(cipher, 0, sizeof(cipher));
-
- nextline:
- /* advance to next line */
- while( *res && *res++ != '\n' );
- }
- while( *res );
-
- *len = count * sizeof(struct iwinfo_scanlist_entry);
- return 0;
- }
+ return 0;
}
/* station / ad-hoc / monitor scan */
if (!iwinfo_ifup(ifname))
return -1;
- nl80211_get_scanlist_nl(ifname, buf, len);
+ rv = nl80211_get_scanlist_nl(ifname, buf, len);
iwinfo_ifdown(ifname);
- return 0;
+ return rv;
}
/* Spawn a new scan interface */
else
{
if (!(res = nl80211_ifadd(ifname)))
- goto out;
+ return -1;
iwinfo_ifmac(res);
* additional interface and there's no need to tear down the ap */
if (iwinfo_ifup(res))
{
- nl80211_get_scanlist_nl(res, buf, len);
+ rv = nl80211_get_scanlist_nl(res, buf, len);
iwinfo_ifdown(res);
}
* during scan */
else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
{
- nl80211_get_scanlist_nl(res, buf, len);
+ rv = nl80211_get_scanlist_nl(res, buf, len);
iwinfo_ifdown(res);
iwinfo_ifup(ifname);
nl80211_hostapd_hup(ifname);
}
- out:
nl80211_ifdel(res);
- return 0;
+ return rv;
}
}
projects / oweals / iwinfo.git / commitdiff