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NetBSD/dist/wpa_supplicant/ctrl_iface.c

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/*
* WPA Supplicant / UNIX domain and UDP socket -based control interface
* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#ifndef CONFIG_NATIVE_WINDOWS
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <sys/uio.h>
#endif /* CONFIG_NATIVE_WINDOWS */
#include "common.h"
#include "eloop.h"
#include "wpa.h"
#include "wpa_supplicant.h"
#include "config.h"
#include "eapol_sm.h"
#include "wpa_supplicant_i.h"
#include "ctrl_iface.h"
#include "l2_packet.h"
#include "preauth.h"
#include "wpa_ctrl.h"
#include "eap.h"
#ifdef CONFIG_CTRL_IFACE_UDP
#define CTRL_IFACE_SOCK struct sockaddr_in
#else /* CONFIG_CTRL_IFACE_UDP */
#define CTRL_IFACE_SOCK struct sockaddr_un
#endif /* CONFIG_CTRL_IFACE_UDP */
/**
* struct wpa_ctrl_dst - Internal data structure of control interface monitors
*
* This structure is used to store information about registered control
* interface monitors into struct wpa_supplicant. This data is private to
* ctrl_iface.c and should not be touched directly from other files.
*/
struct wpa_ctrl_dst {
struct wpa_ctrl_dst *next;
CTRL_IFACE_SOCK addr;
socklen_t addrlen;
int debug_level;
int errors;
};
static int wpa_supplicant_ctrl_iface_set(struct wpa_supplicant *wpa_s,
char *cmd)
{
char *value;
int ret = 0;
value = strchr(cmd, ' ');
if (value == NULL)
return -1;
*value++ = '\0';
wpa_printf(MSG_DEBUG, "CTRL_IFACE SET '%s'='%s'", cmd, value);
if (strcasecmp(cmd, "EAPOL::heldPeriod") == 0) {
eapol_sm_configure(wpa_s->eapol,
atoi(value), -1, -1, -1);
} else if (strcasecmp(cmd, "EAPOL::authPeriod") == 0) {
eapol_sm_configure(wpa_s->eapol,
-1, atoi(value), -1, -1);
} else if (strcasecmp(cmd, "EAPOL::startPeriod") == 0) {
eapol_sm_configure(wpa_s->eapol,
-1, -1, atoi(value), -1);
} else if (strcasecmp(cmd, "EAPOL::maxStart") == 0) {
eapol_sm_configure(wpa_s->eapol,
-1, -1, -1, atoi(value));
} else if (strcasecmp(cmd, "dot11RSNAConfigPMKLifetime") == 0) {
if (wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
atoi(value)))
ret = -1;
} else if (strcasecmp(cmd, "dot11RSNAConfigPMKReauthThreshold") == 0) {
if (wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
atoi(value)))
ret = -1;
} else if (strcasecmp(cmd, "dot11RSNAConfigSATimeout") == 0) {
if (wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT, atoi(value)))
ret = -1;
} else
ret = -1;
return ret;
}
static int wpa_supplicant_ctrl_iface_preauth(struct wpa_supplicant *wpa_s,
char *addr)
{
u8 bssid[ETH_ALEN];
if (hwaddr_aton(addr, bssid)) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE PREAUTH: invalid address "
"'%s'", addr);
return -1;
}
wpa_printf(MSG_DEBUG, "CTRL_IFACE PREAUTH " MACSTR, MAC2STR(bssid));
rsn_preauth_deinit(wpa_s->wpa);
if (rsn_preauth_init(wpa_s->wpa, bssid, wpa_s->current_ssid))
return -1;
return 0;
}
static int wpa_supplicant_ctrl_iface_attach(struct wpa_supplicant *wpa_s,
CTRL_IFACE_SOCK *from,
socklen_t fromlen)
{
struct wpa_ctrl_dst *dst;
dst = malloc(sizeof(*dst));
if (dst == NULL)
return -1;
memset(dst, 0, sizeof(*dst));
memcpy(&dst->addr, from, sizeof(CTRL_IFACE_SOCK));
dst->addrlen = fromlen;
dst->debug_level = MSG_INFO;
dst->next = wpa_s->ctrl_dst;
wpa_s->ctrl_dst = dst;
#ifdef CONFIG_CTRL_IFACE_UDP
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor attached %s:%d",
inet_ntoa(from->sin_addr), ntohs(from->sin_port));
#else /* CONFIG_CTRL_IFACE_UDP */
wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
(u8 *) from->sun_path, fromlen - sizeof(from->sun_family));
#endif /* CONFIG_CTRL_IFACE_UDP */
return 0;
}
static int wpa_supplicant_ctrl_iface_detach(struct wpa_supplicant *wpa_s,
CTRL_IFACE_SOCK *from,
socklen_t fromlen)
{
struct wpa_ctrl_dst *dst, *prev = NULL;
dst = wpa_s->ctrl_dst;
while (dst) {
#ifdef CONFIG_CTRL_IFACE_UDP
if (from->sin_addr.s_addr == dst->addr.sin_addr.s_addr &&
from->sin_port == dst->addr.sin_port) {
if (prev == NULL)
wpa_s->ctrl_dst = dst->next;
else
prev->next = dst->next;
free(dst);
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor detached "
"%s:%d", inet_ntoa(from->sin_addr),
ntohs(from->sin_port));
return 0;
}
#else /* CONFIG_CTRL_IFACE_UDP */
if (fromlen == dst->addrlen &&
memcmp(from->sun_path, dst->addr.sun_path,
fromlen - sizeof(from->sun_family)) == 0) {
if (prev == NULL)
wpa_s->ctrl_dst = dst->next;
else
prev->next = dst->next;
free(dst);
wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
(u8 *) from->sun_path,
fromlen - sizeof(from->sun_family));
return 0;
}
#endif /* CONFIG_CTRL_IFACE_UDP */
prev = dst;
dst = dst->next;
}
return -1;
}
static int wpa_supplicant_ctrl_iface_level(struct wpa_supplicant *wpa_s,
CTRL_IFACE_SOCK *from,
socklen_t fromlen,
char *level)
{
struct wpa_ctrl_dst *dst;
wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
dst = wpa_s->ctrl_dst;
while (dst) {
#ifdef CONFIG_CTRL_IFACE_UDP
if (from->sin_addr.s_addr == dst->addr.sin_addr.s_addr &&
from->sin_port == dst->addr.sin_port) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE changed monitor "
"level %s:%d", inet_ntoa(from->sin_addr),
ntohs(from->sin_port));
dst->debug_level = atoi(level);
return 0;
}
#else /* CONFIG_CTRL_IFACE_UDP */
if (fromlen == dst->addrlen &&
memcmp(from->sun_path, dst->addr.sun_path,
fromlen - sizeof(from->sun_family)) == 0) {
wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
"level", (u8 *) from->sun_path,
fromlen - sizeof(from->sun_family));
dst->debug_level = atoi(level);
return 0;
}
#endif /* CONFIG_CTRL_IFACE_UDP */
dst = dst->next;
}
return -1;
}
static int wpa_supplicant_ctrl_iface_ctrl_rsp(struct wpa_supplicant *wpa_s,
char *rsp)
{
char *pos, *id_pos;
int id;
struct wpa_ssid *ssid;
pos = strchr(rsp, '-');
if (pos == NULL)
return -1;
*pos++ = '\0';
id_pos = pos;
pos = strchr(pos, ':');
if (pos == NULL)
return -1;
*pos++ = '\0';
id = atoi(id_pos);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: field=%s id=%d", rsp, id);
wpa_hexdump_ascii_key(MSG_DEBUG, "CTRL_IFACE: value",
(u8 *) pos, strlen(pos));
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find SSID id=%d "
"to update", id);
return -1;
}
if (strcmp(rsp, "IDENTITY") == 0) {
free(ssid->identity);
ssid->identity = (u8 *) strdup(pos);
ssid->identity_len = strlen(pos);
ssid->pending_req_identity = 0;
if (ssid == wpa_s->current_ssid)
wpa_s->reassociate = 1;
} else if (strcmp(rsp, "PASSWORD") == 0) {
free(ssid->password);
ssid->password = (u8 *) strdup(pos);
ssid->password_len = strlen(pos);
ssid->pending_req_password = 0;
if (ssid == wpa_s->current_ssid)
wpa_s->reassociate = 1;
} else if (strcmp(rsp, "NEW_PASSWORD") == 0) {
free(ssid->new_password);
ssid->new_password = (u8 *) strdup(pos);
ssid->new_password_len = strlen(pos);
ssid->pending_req_new_password = 0;
if (ssid == wpa_s->current_ssid)
wpa_s->reassociate = 1;
} else if (strcmp(rsp, "PIN") == 0) {
free(ssid->pin);
ssid->pin = strdup(pos);
ssid->pending_req_pin = 0;
if (ssid == wpa_s->current_ssid)
wpa_s->reassociate = 1;
} else if (strcmp(rsp, "OTP") == 0) {
free(ssid->otp);
ssid->otp = (u8 *) strdup(pos);
ssid->otp_len = strlen(pos);
free(ssid->pending_req_otp);
ssid->pending_req_otp = NULL;
ssid->pending_req_otp_len = 0;
} else if (strcmp(rsp, "PASSPHRASE") == 0) {
free(ssid->private_key_passwd);
ssid->private_key_passwd = (u8 *) strdup(pos);
ssid->pending_req_passphrase = 0;
if (ssid == wpa_s->current_ssid)
wpa_s->reassociate = 1;
} else {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Unknown field '%s'", rsp);
return -1;
}
return 0;
}
static int wpa_supplicant_ctrl_iface_status(struct wpa_supplicant *wpa_s,
const char *params,
char *buf, size_t buflen)
{
char *pos, *end, tmp[30];
int res, verbose;
verbose = strcmp(params, "-VERBOSE") == 0;
pos = buf;
end = buf + buflen;
if (wpa_s->wpa_state >= WPA_ASSOCIATED) {
pos += snprintf(pos, end - pos, "bssid=" MACSTR "\n",
MAC2STR(wpa_s->bssid));
if (wpa_s->current_ssid) {
pos += snprintf(pos, end - pos, "ssid=%s\n",
wpa_ssid_txt(wpa_s->current_ssid->ssid,
wpa_s->current_ssid->
ssid_len));
}
pos += wpa_sm_get_status(wpa_s->wpa, pos, end - pos, verbose);
}
pos += snprintf(pos, end - pos, "wpa_state=%s\n",
wpa_supplicant_state_txt(wpa_s->wpa_state));
if (wpa_s->l2 &&
l2_packet_get_ip_addr(wpa_s->l2, tmp, sizeof(tmp)) >= 0)
pos += snprintf(pos, end - pos, "ip_address=%s\n", tmp);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X ||
wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
res = eapol_sm_get_status(wpa_s->eapol, pos, end - pos,
verbose);
if (res >= 0)
pos += res;
}
res = rsn_preauth_get_status(wpa_s->wpa, pos, end - pos, verbose);
if (res >= 0)
pos += res;
return pos - buf;
}
static int wpa_supplicant_ctrl_iface_bssid(struct wpa_supplicant *wpa_s,
char *cmd)
{
char *pos;
int id;
struct wpa_ssid *ssid;
u8 bssid[ETH_ALEN];
/* cmd: "<network id> <BSSID>" */
pos = strchr(cmd, ' ');
if (pos == NULL)
return -1;
*pos++ = '\0';
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: id=%d bssid='%s'", id, pos);
if (hwaddr_aton(pos, bssid)) {
wpa_printf(MSG_DEBUG ,"CTRL_IFACE: invalid BSSID '%s'", pos);
return -1;
}
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find SSID id=%d "
"to update", id);
return -1;
}
memcpy(ssid->bssid, bssid, ETH_ALEN);
ssid->bssid_set =
memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) != 0;
return 0;
}
static int wpa_supplicant_ctrl_iface_list_networks(
struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
char *pos, *end;
struct wpa_ssid *ssid;
pos = buf;
end = buf + buflen;
pos += snprintf(pos, end - pos, "network id / ssid / bssid / flags\n");
ssid = wpa_s->conf->ssid;
while (ssid) {
pos += snprintf(pos, end - pos, "%d\t%s",
ssid->id,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
if (ssid->bssid_set) {
pos += snprintf(pos, end - pos, "\t" MACSTR,
MAC2STR(ssid->bssid));
} else {
pos += snprintf(pos, end - pos, "\tany");
}
pos += snprintf(pos, end - pos, "\t%s%s",
ssid == wpa_s->current_ssid ? "[CURRENT]" : "",
ssid->disabled ? "[DISABLED]" : "");
pos += snprintf(pos, end - pos, "\n");
ssid = ssid->next;
}
return pos - buf;
}
static char * wpa_supplicant_cipher_txt(char *pos, char *end, int cipher)
{
int first = 1;
pos += snprintf(pos, end - pos, "-");
if (cipher & WPA_CIPHER_NONE) {
pos += snprintf(pos, end - pos, "%sNONE", first ? "" : "+");
first = 0;
}
if (cipher & WPA_CIPHER_WEP40) {
pos += snprintf(pos, end - pos, "%sWEP40", first ? "" : "+");
first = 0;
}
if (cipher & WPA_CIPHER_WEP104) {
pos += snprintf(pos, end - pos, "%sWEP104", first ? "" : "+");
first = 0;
}
if (cipher & WPA_CIPHER_TKIP) {
pos += snprintf(pos, end - pos, "%sTKIP", first ? "" : "+");
first = 0;
}
if (cipher & WPA_CIPHER_CCMP) {
pos += snprintf(pos, end - pos, "%sCCMP", first ? "" : "+");
first = 0;
}
return pos;
}
static char * wpa_supplicant_ie_txt(struct wpa_supplicant *wpa_s,
char *pos, char *end, const char *proto,
const u8 *ie, size_t ie_len)
{
struct wpa_ie_data data;
int first;
pos += snprintf(pos, end - pos, "[%s-", proto);
if (wpa_parse_wpa_ie(ie, ie_len, &data) < 0) {
pos += snprintf(pos, end - pos, "?]");
return pos;
}
first = 1;
if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
pos += snprintf(pos, end - pos, "%sEAP", first ? "" : "+");
first = 0;
}
if (data.key_mgmt & WPA_KEY_MGMT_PSK) {
pos += snprintf(pos, end - pos, "%sPSK", first ? "" : "+");
first = 0;
}
if (data.key_mgmt & WPA_KEY_MGMT_WPA_NONE) {
pos += snprintf(pos, end - pos, "%sNone", first ? "" : "+");
first = 0;
}
pos = wpa_supplicant_cipher_txt(pos, end, data.pairwise_cipher);
if (data.capabilities & WPA_CAPABILITY_PREAUTH)
pos += snprintf(pos, end - pos, "-preauth");
pos += snprintf(pos, end - pos, "]");
return pos;
}
static int wpa_supplicant_ctrl_iface_scan_results(
struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
char *pos, *end;
struct wpa_scan_result *res;
int i;
if (wpa_s->scan_results == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return 0;
pos = buf;
end = buf + buflen;
pos += snprintf(pos, end - pos, "bssid / frequency / signal level / "
"flags / ssid\n");
for (i = 0; i < wpa_s->num_scan_results; i++) {
res = &wpa_s->scan_results[i];
pos += snprintf(pos, end - pos, MACSTR "\t%d\t%d\t",
MAC2STR(res->bssid), res->freq, res->level);
if (res->wpa_ie_len) {
pos = wpa_supplicant_ie_txt(wpa_s, pos, end, "WPA",
res->wpa_ie,
res->wpa_ie_len);
}
if (res->rsn_ie_len) {
pos = wpa_supplicant_ie_txt(wpa_s, pos, end, "WPA2",
res->rsn_ie,
res->rsn_ie_len);
}
if (!res->wpa_ie_len && !res->rsn_ie_len &&
res->caps & IEEE80211_CAP_PRIVACY)
pos += snprintf(pos, end - pos, "[WEP]");
if (res->caps & IEEE80211_CAP_IBSS)
pos += snprintf(pos, end - pos, "[IBSS]");
pos += snprintf(pos, end - pos, "\t%s",
wpa_ssid_txt(res->ssid, res->ssid_len));
pos += snprintf(pos, end - pos, "\n");
}
return pos - buf;
}
static int wpa_supplicant_ctrl_iface_select_network(
struct wpa_supplicant *wpa_s, char *cmd)
{
int id;
struct wpa_ssid *ssid;
/* cmd: "<network id>" or "any" */
if (strcmp(cmd, "any") == 0) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK any");
ssid = wpa_s->conf->ssid;
while (ssid) {
ssid->disabled = 0;
ssid = ssid->next;
}
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
}
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK id=%d", id);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
if (ssid != wpa_s->current_ssid && wpa_s->current_ssid)
wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
/* Mark all other networks disabled and trigger reassociation */
ssid = wpa_s->conf->ssid;
while (ssid) {
ssid->disabled = id != ssid->id;
ssid = ssid->next;
}
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
}
static int wpa_supplicant_ctrl_iface_enable_network(
struct wpa_supplicant *wpa_s, char *cmd)
{
int id;
struct wpa_ssid *ssid;
/* cmd: "<network id>" */
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: ENABLE_NETWORK id=%d", id);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
if (wpa_s->current_ssid == NULL && ssid->disabled) {
/*
* Try to reassociate since there is no current configuration
* and a new network was made available. */
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
ssid->disabled = 0;
return 0;
}
static int wpa_supplicant_ctrl_iface_disable_network(
struct wpa_supplicant *wpa_s, char *cmd)
{
int id;
struct wpa_ssid *ssid;
/* cmd: "<network id>" */
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: DISABLE_NETWORK id=%d", id);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
if (ssid == wpa_s->current_ssid)
wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
ssid->disabled = 1;
return 0;
}
static int wpa_supplicant_ctrl_iface_add_network(
struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
struct wpa_ssid *ssid;
wpa_printf(MSG_DEBUG, "CTRL_IFACE: ADD_NETWORK");
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
ssid->disabled = 1;
wpa_config_set_network_defaults(ssid);
return snprintf(buf, buflen, "%d\n", ssid->id);
}
static int wpa_supplicant_ctrl_iface_remove_network(
struct wpa_supplicant *wpa_s, char *cmd)
{
int id;
struct wpa_ssid *ssid;
/* cmd: "<network id>" */
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: REMOVE_NETWORK id=%d", id);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL ||
wpa_config_remove_network(wpa_s->conf, id) < 0) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
if (ssid == wpa_s->current_ssid)
wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
return 0;
}
static int wpa_supplicant_ctrl_iface_set_network(
struct wpa_supplicant *wpa_s, char *cmd)
{
int id;
struct wpa_ssid *ssid;
char *name, *value;
/* cmd: "<network id> <variable name> <value>" */
name = strchr(cmd, ' ');
if (name == NULL)
return -1;
*name++ = '\0';
value = strchr(name, ' ');
if (value == NULL)
return -1;
*value++ = '\0';
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SET_NETWORK id=%d name='%s'",
id, name);
wpa_hexdump_ascii_key(MSG_DEBUG, "CTRL_IFACE: value",
(u8 *) value, strlen(value));
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
if (wpa_config_set(ssid, name, value, 0) < 0) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Failed to set network "
"variable '%s'", name);
return -1;
}
if ((strcmp(name, "psk") == 0 && value[0] == '"' && ssid->ssid_len) ||
(strcmp(name, "ssid") == 0 && ssid->passphrase))
wpa_config_update_psk(ssid);
return 0;
}
static int wpa_supplicant_ctrl_iface_get_network(
struct wpa_supplicant *wpa_s, char *cmd, char *buf, size_t buflen)
{
int id;
struct wpa_ssid *ssid;
char *name, *value;
/* cmd: "<network id> <variable name>" */
name = strchr(cmd, ' ');
if (name == NULL)
return -1;
*name++ = '\0';
id = atoi(cmd);
wpa_printf(MSG_DEBUG, "CTRL_IFACE: GET_NETWORK id=%d name='%s'",
id, name);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
"id=%d", id);
return -1;
}
value = wpa_config_get(ssid, name);
if (value == NULL) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Failed to get network "
"variable '%s'", name);
return -1;
}
snprintf(buf, buflen, "%s", value);
free(value);
return strlen(buf);
}
static int wpa_supplicant_ctrl_iface_save_config(struct wpa_supplicant *wpa_s)
{
int ret;
if (!wpa_s->conf->update_config) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Not allowed "
"to update configuration (update_config=0)");
return -1;
}
ret = wpa_config_write(wpa_s->confname, wpa_s->conf);
if (ret) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Failed to "
"update configuration");
} else {
wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Configuration"
" updated");
}
return ret;
}
static int wpa_supplicant_ctrl_iface_get_capability(
struct wpa_supplicant *wpa_s, const char *field, char *buf,
size_t buflen)
{
struct wpa_driver_capa capa;
int res, first = 1;
char *pos, *end;
wpa_printf(MSG_DEBUG, "CTRL_IFACE: GET_CAPABILITY '%s'", field);
if (strcmp(field, "eap") == 0) {
return eap_get_names(buf, buflen);
}
res = wpa_drv_get_capa(wpa_s, &capa);
pos = buf;
end = pos + buflen;
if (strcmp(field, "pairwise") == 0) {
if (res < 0)
return snprintf(buf, buflen, "CCMP TKIP NONE");
if (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP) {
pos += snprintf(pos, end - pos, "%sCCMP",
first ? "" : " ");
first = 0;
}
if (capa.enc & WPA_DRIVER_CAPA_ENC_TKIP) {
pos += snprintf(pos, end - pos, "%sTKIP",
first ? "" : " ");
first = 0;
}
if (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE) {
pos += snprintf(pos, end - pos, "%sNONE",
first ? "" : " ");
first = 0;
}
return pos - buf;
}
if (strcmp(field, "group") == 0) {
if (res < 0)
return snprintf(buf, buflen, "CCMP TKIP WEP104 WEP40");
if (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP) {
pos += snprintf(pos, end - pos, "%sCCMP",
first ? "" : " ");
first = 0;
}
if (capa.enc & WPA_DRIVER_CAPA_ENC_TKIP) {
pos += snprintf(pos, end - pos, "%sTKIP",
first ? "" : " ");
first = 0;
}
if (capa.enc & WPA_DRIVER_CAPA_ENC_WEP104) {
pos += snprintf(pos, end - pos, "%sWEP104",
first ? "" : " ");
first = 0;
}
if (capa.enc & WPA_DRIVER_CAPA_ENC_WEP40) {
pos += snprintf(pos, end - pos, "%sWEP40",
first ? "" : " ");
first = 0;
}
return pos - buf;
}
if (strcmp(field, "key_mgmt") == 0) {
if (res < 0) {
return snprintf(buf, buflen, "WPA-PSK WPA-EAP "
"IEEE8021X WPA-NONE NONE");
}
pos += snprintf(pos, end - pos, "NONE IEEE8021X");
if (capa.key_mgmt & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2))
pos += snprintf(pos, end - pos, " WPA-EAP");
if (capa.key_mgmt & (WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK))
pos += snprintf(pos, end - pos, " WPA-PSK");
if (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE)
pos += snprintf(pos, end - pos, " WPA-NONE");
return pos - buf;
}
if (strcmp(field, "proto") == 0) {
if (res < 0)
return snprintf(buf, buflen, "RSN WPA");
if (capa.key_mgmt & (WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
pos += snprintf(pos, end - pos, "%sRSN",
first ? "" : " ");
first = 0;
}
if (capa.key_mgmt & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK)) {
pos += snprintf(pos, end - pos, "%sWPA",
first ? "" : " ");
first = 0;
}
return pos - buf;
}
if (strcmp(field, "auth_alg") == 0) {
if (res < 0)
return snprintf(buf, buflen, "OPEN SHARED LEAP");
if (capa.auth & (WPA_DRIVER_AUTH_OPEN)) {
pos += snprintf(pos, end - pos, "%sOPEN",
first ? "" : " ");
first = 0;
}
if (capa.auth & (WPA_DRIVER_AUTH_SHARED)) {
pos += snprintf(pos, end - pos, "%sSHARED",
first ? "" : " ");
first = 0;
}
if (capa.auth & (WPA_DRIVER_AUTH_LEAP)) {
pos += snprintf(pos, end - pos, "%sLEAP",
first ? "" : " ");
first = 0;
}
return pos - buf;
}
wpa_printf(MSG_DEBUG, "CTRL_IFACE: Unknown GET_CAPABILITY field '%s'",
field);
return -1;
}
static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
char buf[256];
int res;
CTRL_IFACE_SOCK from;
socklen_t fromlen = sizeof(from);
char *reply;
const int reply_size = 2048;
int reply_len;
int new_attached = 0, ctrl_rsp = 0;
res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
(struct sockaddr *) &from, &fromlen);
if (res < 0) {
perror("recvfrom(ctrl_iface)");
return;
}
buf[res] = '\0';
if (strncmp(buf, WPA_CTRL_RSP, strlen(WPA_CTRL_RSP)) == 0 ||
strncmp(buf, "SET_NETWORK ", 12) == 0) {
wpa_hexdump_ascii_key(MSG_DEBUG, "RX ctrl_iface",
(u8 *) buf, res);
} else {
wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
}
reply = malloc(reply_size);
if (reply == NULL) {
sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
fromlen);
return;
}
memcpy(reply, "OK\n", 3);
reply_len = 3;
if (strcmp(buf, "PING") == 0) {
memcpy(reply, "PONG\n", 5);
reply_len = 5;
} else if (strcmp(buf, "MIB") == 0) {
reply_len = wpa_sm_get_mib(wpa_s->wpa, reply, reply_size);
if (reply_len >= 0) {
res = eapol_sm_get_mib(wpa_s->eapol, reply + reply_len,
reply_size - reply_len);
if (res < 0)
reply_len = -1;
else
reply_len += res;
}
} else if (strncmp(buf, "STATUS", 6) == 0) {
reply_len = wpa_supplicant_ctrl_iface_status(
wpa_s, buf + 6, reply, reply_size);
} else if (strcmp(buf, "PMKSA") == 0) {
reply_len = pmksa_cache_list(wpa_s->wpa, reply, reply_size);
} else if (strncmp(buf, "SET ", 4) == 0) {
if (wpa_supplicant_ctrl_iface_set(wpa_s, buf + 4))
reply_len = -1;
} else if (strcmp(buf, "LOGON") == 0) {
eapol_sm_notify_logoff(wpa_s->eapol, FALSE);
} else if (strcmp(buf, "LOGOFF") == 0) {
eapol_sm_notify_logoff(wpa_s->eapol, TRUE);
} else if (strcmp(buf, "REASSOCIATE") == 0) {
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
} else if (strncmp(buf, "PREAUTH ", 8) == 0) {
if (wpa_supplicant_ctrl_iface_preauth(wpa_s, buf + 8))
reply_len = -1;
} else if (strcmp(buf, "ATTACH") == 0) {
if (wpa_supplicant_ctrl_iface_attach(wpa_s, &from, fromlen))
reply_len = -1;
else
new_attached = 1;
} else if (strcmp(buf, "DETACH") == 0) {
if (wpa_supplicant_ctrl_iface_detach(wpa_s, &from, fromlen))
reply_len = -1;
} else if (strncmp(buf, "LEVEL ", 6) == 0) {
if (wpa_supplicant_ctrl_iface_level(wpa_s, &from, fromlen,
buf + 6))
reply_len = -1;
} else if (strncmp(buf, WPA_CTRL_RSP, strlen(WPA_CTRL_RSP)) == 0) {
if (wpa_supplicant_ctrl_iface_ctrl_rsp(
wpa_s, buf + strlen(WPA_CTRL_RSP)))
reply_len = -1;
else
ctrl_rsp = 1;
} else if (strcmp(buf, "RECONFIGURE") == 0) {
if (wpa_supplicant_reload_configuration(wpa_s))
reply_len = -1;
} else if (strcmp(buf, "TERMINATE") == 0) {
eloop_terminate();
} else if (strncmp(buf, "BSSID ", 6) == 0) {
if (wpa_supplicant_ctrl_iface_bssid(wpa_s, buf + 6))
reply_len = -1;
} else if (strcmp(buf, "LIST_NETWORKS") == 0) {
reply_len = wpa_supplicant_ctrl_iface_list_networks(
wpa_s, reply, reply_size);
} else if (strcmp(buf, "DISCONNECT") == 0) {
wpa_s->disconnected = 1;
wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
} else if (strcmp(buf, "SCAN") == 0) {
wpa_s->scan_req = 2;
wpa_supplicant_req_scan(wpa_s, 0, 0);
} else if (strcmp(buf, "SCAN_RESULTS") == 0) {
reply_len = wpa_supplicant_ctrl_iface_scan_results(
wpa_s, reply, reply_size);
} else if (strncmp(buf, "SELECT_NETWORK ", 15) == 0) {
if (wpa_supplicant_ctrl_iface_select_network(wpa_s, buf + 15))
reply_len = -1;
} else if (strncmp(buf, "ENABLE_NETWORK ", 15) == 0) {
if (wpa_supplicant_ctrl_iface_enable_network(wpa_s, buf + 15))
reply_len = -1;
} else if (strncmp(buf, "DISABLE_NETWORK ", 16) == 0) {
if (wpa_supplicant_ctrl_iface_disable_network(wpa_s, buf + 16))
reply_len = -1;
} else if (strcmp(buf, "ADD_NETWORK") == 0) {
reply_len = wpa_supplicant_ctrl_iface_add_network(
wpa_s, reply, reply_size);
} else if (strncmp(buf, "REMOVE_NETWORK ", 15) == 0) {
if (wpa_supplicant_ctrl_iface_remove_network(wpa_s, buf + 15))
reply_len = -1;
} else if (strncmp(buf, "SET_NETWORK ", 12) == 0) {
if (wpa_supplicant_ctrl_iface_set_network(wpa_s, buf + 12))
reply_len = -1;
} else if (strncmp(buf, "GET_NETWORK ", 12) == 0) {
reply_len = wpa_supplicant_ctrl_iface_get_network(
wpa_s, buf + 12, reply, reply_size);
} else if (strcmp(buf, "SAVE_CONFIG") == 0) {
if (wpa_supplicant_ctrl_iface_save_config(wpa_s))
reply_len = -1;
} else if (strncmp(buf, "GET_CAPABILITY ", 15) == 0) {
reply_len = wpa_supplicant_ctrl_iface_get_capability(
wpa_s, buf + 15, reply, reply_size);
} else {
memcpy(reply, "UNKNOWN COMMAND\n", 16);
reply_len = 16;
}
if (reply_len < 0) {
memcpy(reply, "FAIL\n", 5);
reply_len = 5;
}
sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
free(reply);
if (new_attached)
eapol_sm_notify_ctrl_attached(wpa_s->eapol);
if (ctrl_rsp)
eapol_sm_notify_ctrl_response(wpa_s->eapol);
}
#ifndef CONFIG_CTRL_IFACE_UDP
static char * wpa_supplicant_ctrl_iface_path(struct wpa_supplicant *wpa_s)
{
char *buf;
size_t len;
if (wpa_s->conf->ctrl_interface == NULL)
return NULL;
len = strlen(wpa_s->conf->ctrl_interface) + strlen(wpa_s->ifname) + 2;
buf = malloc(len);
if (buf == NULL)
return NULL;
snprintf(buf, len, "%s/%s",
wpa_s->conf->ctrl_interface, wpa_s->ifname);
#ifdef __CYGWIN__
{
/* Windows/WinPcap uses interface names that are not suitable
* as a file name - convert invalid chars to underscores */
char *pos = buf;
while (*pos) {
if (*pos == '\\')
*pos = '_';
pos++;
}
}
#endif /* __CYGWIN__ */
return buf;
}
#endif /* CONFIG_CTRL_IFACE_UDP */
/**
* wpa_supplicant_ctrl_iface_init - Initialize control interface
* @wpa_s: Pointer to wpa_supplicant data
* Returns: 0 on success, -1 on failure
*
* Initialize the control interface and start receiving commands from external
* programs.
*/
int wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
{
CTRL_IFACE_SOCK addr;
int s = -1;
#ifndef CONFIG_CTRL_IFACE_UDP
char *fname = NULL;
#endif /* CONFIG_CTRL_IFACE_UDP */
wpa_s->ctrl_sock = -1;
if (wpa_s->conf->ctrl_interface == NULL)
return 0;
#ifdef CONFIG_CTRL_IFACE_UDP
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_INET)");
goto fail;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl((127 << 24) | 1);
addr.sin_port = htons(WPA_CTRL_IFACE_PORT);
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind(AF_INET)");
goto fail;
}
#else /* CONFIG_CTRL_IFACE_UDP */
if (mkdir(wpa_s->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
if (errno == EEXIST) {
wpa_printf(MSG_DEBUG, "Using existing control "
"interface directory.");
} else {
perror("mkdir[ctrl_interface]");
goto fail;
}
}
if (wpa_s->conf->ctrl_interface_gid_set &&
chown(wpa_s->conf->ctrl_interface, 0,
wpa_s->conf->ctrl_interface_gid) < 0) {
perror("chown[ctrl_interface]");
return -1;
}
if (strlen(wpa_s->conf->ctrl_interface) + 1 + strlen(wpa_s->ifname) >=
sizeof(addr.sun_path))
goto fail;
s = socket(PF_UNIX, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_UNIX)");
goto fail;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
fname = wpa_supplicant_ctrl_iface_path(wpa_s);
if (fname == NULL)
goto fail;
strncpy(addr.sun_path, fname, sizeof(addr.sun_path));
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind(PF_UNIX)");
if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
" allow connections - assuming it was left"
"over from forced program termination");
if (unlink(fname) < 0) {
perror("unlink[ctrl_iface]");
wpa_printf(MSG_ERROR, "Could not unlink "
"existing ctrl_iface socket '%s'",
fname);
goto fail;
}
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
0) {
perror("bind(PF_UNIX)");
goto fail;
}
wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
"ctrl_iface socket '%s'", fname);
} else {
wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
"be in use - cannot override it");
wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
"not used anymore", fname);
free(fname);
fname = NULL;
goto fail;
}
}
if (wpa_s->conf->ctrl_interface_gid_set &&
chown(fname, 0, wpa_s->conf->ctrl_interface_gid) < 0) {
perror("chown[ctrl_interface/ifname]");
goto fail;
}
if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
perror("chmod[ctrl_interface/ifname]");
goto fail;
}
free(fname);
#endif /* CONFIG_CTRL_IFACE_UDP */
wpa_s->ctrl_sock = s;
eloop_register_read_sock(s, wpa_supplicant_ctrl_iface_receive, wpa_s,
NULL);
return 0;
fail:
if (s >= 0)
close(s);
#ifndef CONFIG_CTRL_IFACE_UDP
if (fname) {
unlink(fname);
free(fname);
}
#endif /* CONFIG_CTRL_IFACE_UDP */
return -1;
}
/**
* wpa_supplicant_ctrl_iface_deinit - Deinitialize control interface
* @wpa_s: Pointer to wpa_supplicant data
*
* Deinitialize the control interface that was initialized with
* wpa_supplicant_ctrl_iface_init().
*/
void wpa_supplicant_ctrl_iface_deinit(struct wpa_supplicant *wpa_s)
{
struct wpa_ctrl_dst *dst, *prev;
if (wpa_s->ctrl_sock > -1) {
#ifndef CONFIG_CTRL_IFACE_UDP
char *fname;
#endif /* CONFIG_CTRL_IFACE_UDP */
eloop_unregister_read_sock(wpa_s->ctrl_sock);
if (wpa_s->ctrl_dst) {
/*
* Wait a second before closing the control socket if
* there are any attached monitors in order to allow
* them to receive any pending messages.
*/
wpa_printf(MSG_DEBUG, "CTRL_IFACE wait for attached "
"monitors to receive messages");
sleep(1);
}
close(wpa_s->ctrl_sock);
wpa_s->ctrl_sock = -1;
#ifndef CONFIG_CTRL_IFACE_UDP
fname = wpa_supplicant_ctrl_iface_path(wpa_s);
if (fname)
unlink(fname);
free(fname);
if (rmdir(wpa_s->conf->ctrl_interface) < 0) {
if (errno == ENOTEMPTY) {
wpa_printf(MSG_DEBUG, "Control interface "
"directory not empty - leaving it "
"behind");
} else {
perror("rmdir[ctrl_interface]");
}
}
#endif /* CONFIG_CTRL_IFACE_UDP */
}
dst = wpa_s->ctrl_dst;
while (dst) {
prev = dst;
dst = dst->next;
free(prev);
}
}
/**
* wpa_supplicant_ctrl_iface_send - Send a control interface packet to monitors
* @wpa_s: Pointer to wpa_supplicant data
* @level: Priority level of the message
* @buf: Message data
* @len: Message length
*
* Send a packet to all monitor programs attached to the control interface.
*/
void wpa_supplicant_ctrl_iface_send(struct wpa_supplicant *wpa_s, int level,
char *buf, size_t len)
{
struct wpa_ctrl_dst *dst, *next;
char levelstr[10];
int idx;
#ifdef CONFIG_CTRL_IFACE_UDP
char *sbuf;
int llen;
dst = wpa_s->ctrl_dst;
if (wpa_s->ctrl_sock < 0 || dst == NULL)
return;
snprintf(levelstr, sizeof(levelstr), "<%d>", level);
llen = strlen(levelstr);
sbuf = malloc(llen + len);
if (sbuf == NULL)
return;
memcpy(sbuf, levelstr, llen);
memcpy(sbuf + llen, buf, len);
idx = 0;
while (dst) {
next = dst->next;
if (level >= dst->debug_level) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor send %s:%d",
inet_ntoa(dst->addr.sin_addr),
ntohs(dst->addr.sin_port));
if (sendto(wpa_s->ctrl_sock, sbuf, llen + len, 0,
(struct sockaddr *) &dst->addr,
sizeof(dst->addr)) < 0) {
perror("sendto(CTRL_IFACE monitor)");
dst->errors++;
if (dst->errors > 10) {
wpa_supplicant_ctrl_iface_detach(
wpa_s, &dst->addr,
dst->addrlen);
}
} else
dst->errors = 0;
}
idx++;
dst = next;
}
free(sbuf);
#else /* CONFIG_CTRL_IFACE_UDP */
struct msghdr msg;
struct iovec io[2];
dst = wpa_s->ctrl_dst;
if (wpa_s->ctrl_sock < 0 || dst == NULL)
return;
snprintf(levelstr, sizeof(levelstr), "<%d>", level);
io[0].iov_base = levelstr;
io[0].iov_len = strlen(levelstr);
io[1].iov_base = buf;
io[1].iov_len = len;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = io;
msg.msg_iovlen = 2;
idx = 0;
while (dst) {
next = dst->next;
if (level >= dst->debug_level) {
wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
(u8 *) dst->addr.sun_path, dst->addrlen -
sizeof(dst->addr.sun_family));
msg.msg_name = &dst->addr;
msg.msg_namelen = dst->addrlen;
if (sendmsg(wpa_s->ctrl_sock, &msg, 0) < 0) {
perror("sendmsg(CTRL_IFACE monitor)");
dst->errors++;
if (dst->errors > 10) {
wpa_supplicant_ctrl_iface_detach(
wpa_s, &dst->addr,
dst->addrlen);
}
} else
dst->errors = 0;
}
idx++;
dst = next;
}
#endif /* CONFIG_CTRL_IFACE_UDP */
}
/**
* wpa_supplicant_ctrl_iface_wait - Wait for ctrl_iface monitor
* @wpa_s: Pointer to wpa_supplicant data
*
* Wait until the first message from an external program using the control
* interface is received. This function can be used to delay normal startup
* processing to allow control interface programs to attach with
* %wpa_supplicant before normal operations are started.
*/
void wpa_supplicant_ctrl_iface_wait(struct wpa_supplicant *wpa_s)
{
fd_set rfds;
if (wpa_s->ctrl_sock < 0)
return;
wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor",
wpa_s->ifname);
FD_ZERO(&rfds);
FD_SET(wpa_s->ctrl_sock, &rfds);
select(wpa_s->ctrl_sock + 1, &rfds, NULL, NULL, NULL);
}
static int wpa_supplicant_global_iface_add(struct wpa_global *global,
char *cmd)
{
struct wpa_interface iface;
char *pos;
/*
* <ifname>TAB<confname>TAB<driver>TAB<ctrl_interface>TAB<driver_param>
*/
wpa_printf(MSG_DEBUG, "CTRL_IFACE GLOBAL INTERFACE_ADD '%s'", cmd);
memset(&iface, 0, sizeof(iface));
do {
iface.ifname = pos = cmd;
pos = strchr(pos, '\t');
if (pos)
*pos++ = '\0';
if (iface.ifname[0] == '\0')
return -1;
if (pos == NULL)
break;
iface.confname = pos;
pos = strchr(pos, '\t');
if (pos)
*pos++ = '\0';
if (iface.confname[0] == '\0')
iface.confname = NULL;
if (pos == NULL)
break;
iface.driver = pos;
pos = strchr(pos, '\t');
if (pos)
*pos++ = '\0';
if (iface.driver[0] == '\0')
iface.driver = NULL;
if (pos == NULL)
break;
iface.ctrl_interface = pos;
pos = strchr(pos, '\t');
if (pos)
*pos++ = '\0';
if (iface.ctrl_interface[0] == '\0')
iface.ctrl_interface = NULL;
if (pos == NULL)
break;
iface.driver_param = pos;
pos = strchr(pos, '\t');
if (pos)
*pos++ = '\0';
if (iface.driver_param[0] == '\0')
iface.driver_param = NULL;
if (pos == NULL)
break;
} while (0);
if (wpa_supplicant_get_iface(global, iface.ifname))
return -1;
return wpa_supplicant_add_iface(global, &iface) ? 0 : -1;
}
static int wpa_supplicant_global_iface_remove(struct wpa_global *global,
char *cmd)
{
struct wpa_supplicant *wpa_s;
wpa_printf(MSG_DEBUG, "CTRL_IFACE GLOBAL INTERFACE_REMOVE '%s'", cmd);
wpa_s = wpa_supplicant_get_iface(global, cmd);
if (wpa_s == NULL)
return -1;
return wpa_supplicant_remove_iface(global, wpa_s);
}
static void wpa_supplicant_global_ctrl_iface_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
struct wpa_global *global = eloop_ctx;
char buf[256];
int res;
CTRL_IFACE_SOCK from;
socklen_t fromlen = sizeof(from);
char *reply;
const int reply_size = 2048;
int reply_len;
res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
(struct sockaddr *) &from, &fromlen);
if (res < 0) {
perror("recvfrom(ctrl_iface)");
return;
}
buf[res] = '\0';
wpa_hexdump_ascii(MSG_DEBUG, "RX global ctrl_iface", (u8 *) buf, res);
reply = malloc(reply_size);
if (reply == NULL) {
sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
fromlen);
return;
}
memcpy(reply, "OK\n", 3);
reply_len = 3;
if (strcmp(buf, "PING") == 0) {
memcpy(reply, "PONG\n", 5);
reply_len = 5;
} else if (strncmp(buf, "INTERFACE_ADD ", 14) == 0) {
if (wpa_supplicant_global_iface_add(global, buf + 14))
reply_len = -1;
} else if (strncmp(buf, "INTERFACE_REMOVE ", 17) == 0) {
if (wpa_supplicant_global_iface_remove(global, buf + 17))
reply_len = -1;
} else {
memcpy(reply, "UNKNOWN COMMAND\n", 16);
reply_len = 16;
}
if (reply_len < 0) {
memcpy(reply, "FAIL\n", 5);
reply_len = 5;
}
sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
free(reply);
}
/**
* wpa_supplicant_global_ctrl_iface_init - Initialize global control interface
* @global: Pointer to global data from wpa_supplicant_init()
* Returns: 0 on success, -1 on failure
*
* Initialize the global control interface and start receiving commands from
* external programs.
*/
int wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
{
CTRL_IFACE_SOCK addr;
int s = -1;
global->ctrl_sock = -1;
if (global->params.ctrl_interface == NULL)
return 0;
wpa_printf(MSG_DEBUG, "Global control interface '%s'",
global->params.ctrl_interface);
#ifdef CONFIG_CTRL_IFACE_UDP
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_INET)");
goto fail;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl((127 << 24) | 1);
addr.sin_port = htons(WPA_GLOBAL_CTRL_IFACE_PORT);
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind(AF_INET)");
goto fail;
}
#else /* CONFIG_CTRL_IFACE_UDP */
s = socket(PF_UNIX, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket(PF_UNIX)");
goto fail;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, global->params.ctrl_interface,
sizeof(addr.sun_path));
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("bind(PF_UNIX)");
if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
" allow connections - assuming it was left"
"over from forced program termination");
if (unlink(global->params.ctrl_interface) < 0) {
perror("unlink[ctrl_iface]");
wpa_printf(MSG_ERROR, "Could not unlink "
"existing ctrl_iface socket '%s'",
global->params.ctrl_interface);
goto fail;
}
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
0) {
perror("bind(PF_UNIX)");
goto fail;
}
wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
"ctrl_iface socket '%s'",
global->params.ctrl_interface);
} else {
wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
"be in use - cannot override it");
wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
"not used anymore",
global->params.ctrl_interface);
goto fail;
}
}
#endif /* CONFIG_CTRL_IFACE_UDP */
global->ctrl_sock = s;
eloop_register_read_sock(s, wpa_supplicant_global_ctrl_iface_receive,
global, NULL);
return 0;
fail:
if (s >= 0)
close(s);
return -1;
}
/**
* wpa_supplicant_global_ctrl_iface_deinit - Deinitialize global ctrl interface
* @global: Pointer to global data from wpa_supplicant_init()
*
* Deinitialize the global control interface that was initialized with
* wpa_supplicant_global_ctrl_iface_init().
*/
void wpa_supplicant_global_ctrl_iface_deinit(struct wpa_global *global)
{
if (global->ctrl_sock < 0)
return;
eloop_unregister_read_sock(global->ctrl_sock);
close(global->ctrl_sock);
global->ctrl_sock = -1;
#ifndef CONFIG_CTRL_IFACE_UDP
if (global->params.ctrl_interface)
unlink(global->params.ctrl_interface);
#endif /* CONFIG_CTRL_IFACE_UDP */
}
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