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iwd/tools/hwsim.c
James Prestwood 7418c5fd3c hwsim: handle ADD/DEL_MAC_ADDR events 
Handling these events notifies hwsim of address changes for interface
creation/removal outside the initial namespace as well as address
changes due to scanning address randomization.

Interfaces that hwsim already knows about are still handled via
nl80211. But any interfaces not known when ADD/DEL_MAC_ADDR events
come will be treated specially.

For ADD, a dummy interface object will be created and added to the
queue. This lets the frame processing match the destination address
correctly. This can happen both for scan randomization and interface
creation outside of the initial namespace.

For the DEL event we handle similarly and don't touch any interfaces
found via nl80211 (i.e. have a 'name') but need to also be careful
with the dummy interfaces that were created outside the initial
namespace. We want to keep these around but scanning MAC changes can
also delete them. This is why a reference count was added so scanning
doesn't cause a removal.

For example, the following sequence:

ADD_MAC_ADDR (interface creation)
ADD_MAC_ADDR (scanning started)
DEL_MAC_ADDR (scanning done)
2023-07-05 22:03:32 -05:00

3302 lines
77 KiB
C
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/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2013-2019 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <linux/if_ether.h>
#include <linux/rtnetlink.h>
#include <net/if_arp.h>
#include <ell/ell.h>
#include "ell/useful.h"
#include "linux/nl80211.h"
#include "src/util.h"
#include "src/storage.h"
#include "src/mpdu.h"
#include "src/crypto.h"
#include "src/nl80211util.h"
#include "src/nl80211cmd.h"
#define HWSIM_SERVICE "net.connman.hwsim"
#define HWSIM_RADIO_MANAGER_INTERFACE HWSIM_SERVICE ".RadioManager"
#define HWSIM_RADIO_INTERFACE HWSIM_SERVICE ".Radio"
#define HWSIM_INTERFACE_INTERFACE HWSIM_SERVICE ".Interface"
#define HWSIM_RULE_MANAGER_INTERFACE HWSIM_SERVICE ".RuleManager"
#define HWSIM_RULE_INTERFACE HWSIM_SERVICE ".Rule"
enum {
HWSIM_CMD_UNSPEC,
HWSIM_CMD_REGISTER,
HWSIM_CMD_FRAME,
HWSIM_CMD_TX_INFO_FRAME,
HWSIM_CMD_NEW_RADIO,
HWSIM_CMD_DEL_RADIO,
HWSIM_CMD_GET_RADIO,
HWSIM_CMD_ADD_MAC_ADDR,
HWSIM_CMD_DEL_MAC_ADDR,
__HWSIM_CMD_MAX,
};
#define HWSIM_CMD_MAX (__HWSIM_CMD_MAX - 1)
enum {
HWSIM_ATTR_UNSPEC,
HWSIM_ATTR_ADDR_RECEIVER,
HWSIM_ATTR_ADDR_TRANSMITTER,
HWSIM_ATTR_FRAME,
HWSIM_ATTR_FLAGS,
HWSIM_ATTR_RX_RATE,
HWSIM_ATTR_SIGNAL,
HWSIM_ATTR_TX_INFO,
HWSIM_ATTR_COOKIE,
HWSIM_ATTR_CHANNELS,
HWSIM_ATTR_RADIO_ID,
HWSIM_ATTR_REG_HINT_ALPHA2,
HWSIM_ATTR_REG_CUSTOM_REG,
HWSIM_ATTR_REG_STRICT_REG,
HWSIM_ATTR_SUPPORT_P2P_DEVICE,
HWSIM_ATTR_USE_CHANCTX,
HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
HWSIM_ATTR_RADIO_NAME,
HWSIM_ATTR_NO_VIF,
HWSIM_ATTR_FREQ,
HWSIM_ATTR_PAD,
HWSIM_ATTR_TX_INFO_FLAGS,
HWSIM_ATTR_PERM_ADDR,
HWSIM_ATTR_IFTYPE_SUPPORT,
HWSIM_ATTR_CIPHER_SUPPORT,
__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)
/*
* Should be kept in sync with HWSIM_IFTYPE_SUPPORT_MASK in mac80211_hwsim
*/
#define HWSIM_DEFAULT_IFTYPES \
( \
(1 << NL80211_IFTYPE_STATION) | \
(1 << NL80211_IFTYPE_AP) | \
(1 << NL80211_IFTYPE_P2P_CLIENT) | \
(1 << NL80211_IFTYPE_P2P_GO) | \
(1 << NL80211_IFTYPE_ADHOC) | \
(1 << NL80211_IFTYPE_MESH_POINT) \
)
enum hwsim_tx_control_flags {
HWSIM_TX_CTL_REQ_TX_STATUS = 1 << 0,
HWSIM_TX_CTL_NO_ACK = 1 << 1,
HWSIM_TX_STAT_ACK = 1 << 2,
};
#define IEEE80211_TX_RATE_TABLE_SIZE 4
#define HWSIM_DELAY_MIN_MS 1
#define HWSIM_MAX_PREFIX_LEN 128
struct hwsim_rule {
unsigned int id;
uint8_t source[ETH_ALEN];
uint8_t destination[ETH_ALEN];
bool source_any : 1;
bool destination_any : 1;
bool bidirectional : 1;
bool drop : 1;
bool drop_ack : 1;
bool enabled : 1;
uint32_t frequency;
int priority;
int signal;
int delay;
uint8_t *prefix;
size_t prefix_len;
uint8_t *match;
size_t match_len;
uint16_t match_offset;
int match_times; /* negative value indicates unused */
};
struct hwsim_support {
const char *name;
uint32_t value;
};
static struct l_genl *genl;
static struct l_genl_family *hwsim;
static struct l_genl_family *nl80211;
static struct l_netlink *rtnl;
static const char *options;
static int exit_status;
static enum action {
ACTION_NONE,
ACTION_CREATE,
ACTION_DESTROY,
ACTION_LIST,
} action;
static bool no_vif_attr;
static bool p2p_attr;
static bool no_register = false;
static const char *radio_name_attr;
static struct l_dbus *dbus;
static struct l_queue *rules;
static unsigned int next_rule_id;
static uint32_t hwsim_iftypes = HWSIM_DEFAULT_IFTYPES;
static const uint32_t hwsim_supported_ciphers[] = {
CRYPTO_CIPHER_WEP40,
CRYPTO_CIPHER_WEP104,
CRYPTO_CIPHER_TKIP,
CRYPTO_CIPHER_CCMP,
CRYPTO_CIPHER_BIP_CMAC,
CRYPTO_CIPHER_GCMP,
CRYPTO_CIPHER_GCMP_256,
CRYPTO_CIPHER_CCMP_256,
CRYPTO_CIPHER_BIP_GMAC,
CRYPTO_CIPHER_BIP_GMAC_256,
CRYPTO_CIPHER_BIP_CMAC_256,
};
static uint32_t hwsim_ciphers[L_ARRAY_SIZE(hwsim_supported_ciphers)];
static int hwsim_num_ciphers = 0;
/* list of disableable iftypes */
static const struct hwsim_support iftype_map[] = {
{ "station", 1 << NL80211_IFTYPE_STATION },
{ "ap", 1 << NL80211_IFTYPE_AP },
{ "adhoc", 1 << NL80211_IFTYPE_ADHOC },
{ "p2p_client", 1 << NL80211_IFTYPE_P2P_CLIENT },
{ "p2p_go", 1 << NL80211_IFTYPE_P2P_GO },
{ "mesh_point", 1 << NL80211_IFTYPE_MESH_POINT },
{ }
};
static const struct hwsim_support cipher_map[] = {
{ "wep40", CRYPTO_CIPHER_WEP40 },
{ "wep104", CRYPTO_CIPHER_WEP104 },
{ "tkip", CRYPTO_CIPHER_TKIP },
{ "ccmp", CRYPTO_CIPHER_CCMP },
{ "bip_cmac", CRYPTO_CIPHER_BIP_CMAC },
{ "gcmp", CRYPTO_CIPHER_GCMP },
{ "gcmp_256", CRYPTO_CIPHER_GCMP_256 },
{ "ccmp_256", CRYPTO_CIPHER_CCMP_256 },
{ "bip_gmac", CRYPTO_CIPHER_BIP_GMAC },
{ "bip_gmac_256", CRYPTO_CIPHER_BIP_GMAC_256 },
{ "bip_cmac_256", CRYPTO_CIPHER_BIP_CMAC_256 },
{ }
};
static void do_debug(const char *str, void *user_data)
{
const char *prefix = user_data;
l_info("%s%s", prefix, str);
}
static void hwsim_disable_support(const char *disable,
const struct hwsim_support *map, uint32_t *mask)
{
char **list = l_strsplit(disable, ',');
char **iter = list;
int i;
while (*iter) {
for (i = 0; map[i].name; i++) {
if (!strcmp(map[i].name, *iter))
*mask &= ~(map[i].value);
}
iter++;
}
l_strfreev(list);
}
static bool is_cipher_disabled(const char *args, enum crypto_cipher cipher)
{
char **list = l_strsplit(args, ',');
char **iter = list;
int i;
while (*iter) {
for (i = 0; cipher_map[i].name; i++) {
if (!strcmp(*iter, cipher_map[i].name) &&
cipher == cipher_map[i].value) {
printf("disable cipher: %s\n", cipher_map[i].name);
l_strfreev(list);
return true;
}
}
iter++;
}
l_strfreev(list);
return false;
}
static void hwsim_disable_ciphers(const char *disable)
{
uint8_t i;
for (i = 0; i < L_ARRAY_SIZE(hwsim_supported_ciphers); i++) {
if (is_cipher_disabled(disable, hwsim_supported_ciphers[i]))
continue;
hwsim_ciphers[hwsim_num_ciphers] = hwsim_supported_ciphers[i];
hwsim_num_ciphers++;
}
}
static void create_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint32_t radio_id = 0;
/*
* Note that the radio id is returned in the error field of
* the returned message.
*/
if (!l_genl_attr_init(&attr, msg)) {
int err = l_genl_msg_get_error(msg);
if (err < 0) {
l_warn("Failed to initialize create return attributes"
" [%d/%s]", -err, strerror(-err));
exit_status = EXIT_FAILURE;
goto done;
}
radio_id = err;
l_info("Created new radio with id %u", radio_id);
} else {
l_warn("Failed to get create return value");
exit_status = EXIT_FAILURE;
goto done;
}
done:
l_main_quit();
}
static void destroy_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
if (!l_genl_attr_init(&attr, msg)) {
int err = l_genl_msg_get_error(msg);
if (err < 0) {
l_warn("Failed to destroy radio [%d/%s]",
-err, strerror(-err));
exit_status = EXIT_FAILURE;
goto done;
}
l_info("Destroyed radio");
goto done;
}
while (l_genl_attr_next(&attr, &type, &len, &data))
;
done:
l_main_quit();
}
static void list_callback_done(void *user_data)
{
l_main_quit();
}
static void list_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
uint32_t idx = 0, channels = 0, custom_reg = 0;
bool reg_strict = false, p2p = false, chanctx = false;
char alpha2[2] = { };
char *hwname = NULL;
if (!l_genl_attr_init(&attr, msg)) {
int err = l_genl_msg_get_error(msg);
if (err < 0) {
l_warn("Failed to list radio [%d/%s]",
-err, strerror(-err));
exit_status = EXIT_FAILURE;
return;
}
}
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_RADIO_ID:
if (len == 4)
idx = *(int *)data;
break;
case HWSIM_ATTR_CHANNELS:
if (len == 4)
channels = *(uint32_t *)data;
break;
case HWSIM_ATTR_REG_HINT_ALPHA2:
if (len == 2)
memcpy(&alpha2, data, len);
break;
case HWSIM_ATTR_REG_CUSTOM_REG:
if (len == 4)
custom_reg = *(uint32_t *)data;
break;
case HWSIM_ATTR_REG_STRICT_REG:
reg_strict = true;
break;
case HWSIM_ATTR_SUPPORT_P2P_DEVICE:
p2p = true;
break;
case HWSIM_ATTR_USE_CHANCTX:
chanctx = true;
break;
case HWSIM_ATTR_RADIO_NAME:
if (!hwname) {
hwname = l_new(char, len + 1);
strncpy(hwname, data, len);
}
break;
default:
break;
}
}
printf("%s radio id %d channels %d alpha2 %d %d custom reg %d "
"reg strict %d p2p %d chanctx %d\n",
hwname, idx, channels, alpha2[0], alpha2[1], custom_reg,
reg_strict, p2p, chanctx);
if (hwname)
l_free(hwname);
}
struct radio_info_rec {
int32_t id;
uint32_t wiphy_id;
char alpha2[2];
bool p2p;
bool custom_regdom;
uint32_t regdom_idx;
int channels;
uint8_t addrs[2][ETH_ALEN];
char *name;
bool ap_only;
struct l_dbus_message *pending;
uint32_t cmd_id;
};
struct interface_info_rec {
uint32_t id;
struct radio_info_rec *radio_rec;
uint8_t addr[ETH_ALEN];
char *name;
uint32_t iftype;
int ref;
};
static struct l_queue *radio_info;
static struct l_queue *interface_info;
static void radio_free(void *user_data)
{
struct radio_info_rec *rec = user_data;
if (rec->cmd_id)
l_genl_family_cancel(nl80211, rec->cmd_id);
if (rec->pending)
l_dbus_message_unref(rec->pending);
l_free(rec->name);
l_free(rec);
}
static void interface_free(void *user_data)
{
struct interface_info_rec *rec = user_data;
l_free(rec->name);
l_free(rec);
}
static void hwsim_radio_cache_cleanup(void)
{
l_queue_destroy(radio_info, radio_free);
l_queue_destroy(interface_info, interface_free);
radio_info = NULL;
interface_info = NULL;
}
static bool radio_info_match_id(const void *a, const void *b)
{
const struct radio_info_rec *rec = a;
int32_t id = L_PTR_TO_INT(b);
return rec->id == id;
}
static bool radio_info_match_wiphy_id(const void *a, const void *b)
{
const struct radio_info_rec *rec = a;
uint32_t id = L_PTR_TO_UINT(b);
return rec->wiphy_id == id;
}
static bool radio_info_match_addr0(const void *a, const void *b)
{
const struct radio_info_rec *rec = a;
const uint8_t *addr0 = b;
return !memcmp(rec->addrs[0], addr0, ETH_ALEN);
}
static bool radio_info_match_addr1(const void *a, const void *b)
{
const struct radio_info_rec *rec = a;
const uint8_t *addr1 = b;
return !memcmp(rec->addrs[1], addr1, ETH_ALEN);
}
static bool interface_info_match_id(const void *a, const void *b)
{
const struct interface_info_rec *rec = a;
uint32_t id = L_PTR_TO_UINT(b);
return rec->id == id;
}
static bool interface_info_match_addr(const void *a, const void *b)
{
const struct interface_info_rec *rec = a;
const uint8_t *addr = b;
return memcmp(rec->addr, addr, ETH_ALEN) == 0;
}
static const char *radio_get_path(const struct radio_info_rec *rec)
{
static char path[15];
snprintf(path, sizeof(path), "/radio%u", rec->id);
return path;
}
static const char *interface_get_path(const struct interface_info_rec *rec)
{
static char path[25];
snprintf(path, sizeof(path), "%s/%u",
radio_get_path(rec->radio_rec), rec->id);
return path;
}
static struct l_dbus_message *dbus_error_failed(struct l_dbus_message *msg)
{
return l_dbus_message_new_error(msg, HWSIM_SERVICE ".Failed",
"Operation failed");
}
static struct l_dbus_message *dbus_error_invalid_args(
struct l_dbus_message *msg)
{
return l_dbus_message_new_error(msg, HWSIM_SERVICE ".InvalidArgs",
"Argument type is wrong");
}
static void dbus_pending_reply(struct l_dbus_message **msg,
struct l_dbus_message *reply)
{
l_dbus_send(dbus, reply);
l_dbus_message_unref(*msg);
*msg = NULL;
}
static const char *rule_get_path(struct hwsim_rule *rule)
{
static char path[16];
snprintf(path, sizeof(path), "/rule%u", rule->id);
return path;
}
static bool parse_addresses(const uint8_t *buf, size_t len,
struct radio_info_rec *rec)
{
unsigned int pos = 0, addr_idx = 0;
while (pos < len) {
int start_pos = pos;
char addr[20];
/* Find first word start and end */
while (pos < len && !l_ascii_isspace(buf[pos]))
pos++;
if (pos - start_pos > sizeof(addr) - 1) {
l_error("Can't parse a %s address from sysfs",
rec->name);
return false;
}
memcpy(addr, buf + start_pos, pos - start_pos);
addr[pos - start_pos] = '\0';
if (addr_idx >= 2) {
l_error("Hwsim wiphy %s has too many addresses listed "
" in sysfs - only 2 supported", rec->name);
return false;
}
if (!util_string_to_address(addr, rec->addrs[addr_idx])) {
l_error("Can't parse hwsim wiphy %s address from sysfs",
rec->name);
return false;
}
addr_idx++;
/* Skip until the start of the next word */
while (pos < len && l_ascii_isspace(buf[pos]))
pos++;
}
if (addr_idx < 2) {
l_error("Hwsim wiphy %s has too few addresses listed "
" in sysfs - only 2 supported", rec->name);
return false;
}
return true;
}
static void get_radio_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
_auto_(l_free) char *name = NULL;
const int32_t *id = NULL;
struct radio_info_rec *rec = NULL;
uint8_t file_buffer[128];
int bytes, consumed;
unsigned int uintval;
bool changed = false;
bool new = false;
struct radio_info_rec prev_rec;
bool name_change = false;
const char *path;
struct l_dbus_message *reply;
const struct l_queue_entry *entry;
if (!l_genl_attr_init(&attr, msg))
return;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_RADIO_ID:
if (len != 4)
break;
id = data;
/*
* ID of -1 denotes a pending creation, so if somehow
* the kernel ID counter reaches an extremely high
* number of radios we just bail.
*/
if (L_WARN_ON(*id < 0))
return;
break;
case HWSIM_ATTR_RADIO_NAME:
if (name)
break;
name = l_strndup(data, len);
break;
}
}
if (!id || !name)
return;
for (entry = l_queue_get_entries(radio_info); entry;
entry = entry->next) {
struct radio_info_rec *r = entry->data;
if (*id == r->id) {
changed = true;
memcpy(&prev_rec, r, sizeof(prev_rec));
if (strcmp(r->name, name))
name_change = true;
l_free(r->name);
r->name = l_steal_ptr(name);
rec = r;
break;
} else if (!strcmp(r->name, name)) {
rec = r;
rec->id = *id;
break;
}
}
if (!rec) {
new = true;
rec = l_new(struct radio_info_rec, 1);
rec->id = *id;
rec->name = l_steal_ptr(name);
}
l_genl_attr_init(&attr, msg);
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_CHANNELS:
if (len != 4)
break;
rec->channels = *(uint32_t *) data;
break;
case HWSIM_ATTR_REG_HINT_ALPHA2:
if (len != 2)
break;
memcpy(rec->alpha2, data, 2);
break;
case HWSIM_ATTR_SUPPORT_P2P_DEVICE:
rec->p2p = true;
break;
case HWSIM_ATTR_REG_CUSTOM_REG:
if (len != 4)
break;
rec->custom_regdom = true;
rec->regdom_idx = *(uint32_t *) data;
break;
}
}
/*
* Assuming that the radio name is the wiphy name read the wiphy index
* associated with the radio and the wiphy's hardware addresses from
* sysfs. The index could be obtained through NL80211_CMD_GET_WIPHY
* but that is costly and reading the index synchronously simplifies
* the job a lot. We have to resort to sysfs anyway to obtain the
* radio addresses.
*/
bytes = read_file((char *) file_buffer, sizeof(file_buffer) - 1,
"/sys/class/ieee80211/%s/index", rec->name);
if (bytes < 0) {
l_error("Error reading index for %s from sysfs", rec->name);
goto err_free_radio;
}
file_buffer[bytes] = '\0';
if (sscanf((char *) file_buffer, "%u %n", &uintval, &consumed) != 1 ||
consumed != bytes) {
l_error("Error parsing index for %s from sysfs", rec->name);
goto err_free_radio;
}
rec->wiphy_id = uintval;
bytes = read_file(file_buffer, sizeof(file_buffer),
"/sys/class/ieee80211/%s/addresses", rec->name);
if (bytes < 0) {
l_error("Error reading addresses for %s from sysfs", rec->name);
goto err_free_radio;
}
if (!parse_addresses(file_buffer, bytes, rec))
goto err_free_radio;
if (!radio_info)
radio_info = l_queue_new();
if (new)
l_queue_push_tail(radio_info, rec);
path = radio_get_path(rec);
if (!changed) {
/* Create Dbus object */
if (!l_dbus_object_add_interface(dbus, path,
HWSIM_RADIO_INTERFACE, rec))
l_info("Unable to add the %s interface to %s",
HWSIM_RADIO_INTERFACE, path);
if (!l_dbus_object_add_interface(dbus, path,
L_DBUS_INTERFACE_PROPERTIES,
NULL))
l_info("Unable to add the %s interface to %s",
L_DBUS_INTERFACE_PROPERTIES, path);
} else {
/* Emit property change events */
if (memcmp(&prev_rec.addrs, &rec->addrs, sizeof(rec->addrs)))
l_dbus_property_changed(dbus, path,
HWSIM_RADIO_INTERFACE,
"Addresses");
if (name_change)
l_dbus_property_changed(dbus, path,
HWSIM_RADIO_INTERFACE, "Name");
}
/* Send pending CreateRadio reply */
if (rec->pending) {
reply = l_dbus_message_new_method_return(rec->pending);
l_dbus_message_set_arguments(reply, "o", path);
dbus_pending_reply(&rec->pending, reply);
}
return;
err_free_radio:
if (rec->pending)
dbus_pending_reply(&rec->pending,
dbus_error_failed(rec->pending));
if (!new)
l_queue_remove(radio_info, rec);
radio_free(rec);
}
static bool radio_ap_only(struct radio_info_rec *rec)
{
const struct l_queue_entry *i;
unsigned int n = 0;
bool have_ap = false;
for (i = l_queue_get_entries(interface_info); i; i = i->next) {
struct interface_info_rec *interface = i->data;
if (interface->radio_rec != rec)
continue;
if (interface->iftype == NL80211_IFTYPE_AP)
have_ap = true;
n += 1;
}
return n == 1 && have_ap;
}
static void get_wiphy_callback(struct l_genl_msg *msg, void *user_data)
{
const char *name;
uint32_t id;
struct radio_info_rec *rec;
if (nl80211_parse_attrs(msg, NL80211_ATTR_WIPHY, &id,
NL80211_ATTR_WIPHY_NAME, &name,
NL80211_ATTR_UNSPEC) < 0)
return;
rec = l_queue_find(radio_info, radio_info_match_wiphy_id,
L_UINT_TO_PTR(id));
if (!rec)
return;
if (!strcmp(rec->name, name))
return;
l_free(rec->name);
rec->name = l_strdup(name);
l_dbus_property_changed(dbus, radio_get_path(rec),
HWSIM_RADIO_INTERFACE, "Name");
}
static void get_interface_callback(struct l_genl_msg *msg, void *user_data)
{
uint32_t ifindex;
uint32_t wiphy_id;
uint32_t iftype;
const uint8_t *addr;
const char *ifname;
struct interface_info_rec *rec;
struct radio_info_rec *radio_rec;
bool old;
const char *path;
struct interface_info_rec prev_rec;
bool name_change = false;
if (nl80211_parse_attrs(msg, NL80211_ATTR_IFINDEX, &ifindex,
NL80211_ATTR_IFNAME, &ifname,
NL80211_ATTR_WIPHY, &wiphy_id,
NL80211_ATTR_IFTYPE, &iftype,
NL80211_ATTR_MAC, &addr,
NL80211_ATTR_UNSPEC) < 0)
return;
radio_rec = l_queue_find(radio_info, radio_info_match_wiphy_id,
L_UINT_TO_PTR(wiphy_id));
if (!radio_rec)
/* This is not a hwsim interface, don't track it */
return;
rec = l_queue_find(interface_info, interface_info_match_id,
L_UINT_TO_PTR(ifindex));
if (rec) {
old = true;
memcpy(&prev_rec, rec, sizeof(prev_rec));
if (strcmp(rec->name, ifname))
name_change = true;
l_free(rec->name);
} else {
old = false;
rec = l_new(struct interface_info_rec, 1);
rec->id = ifindex;
rec->radio_rec = radio_rec;
}
memcpy(rec->addr, addr, ETH_ALEN);
rec->name = l_strdup(ifname);
rec->iftype = iftype;
if (!interface_info)
interface_info = l_queue_new();
if (!old)
l_queue_push_tail(interface_info, rec);
path = interface_get_path(rec);
if (!old) {
/* Create Dbus object */
if (!l_dbus_object_add_interface(dbus, path,
HWSIM_INTERFACE_INTERFACE, rec))
l_info("Unable to add the %s interface to %s",
HWSIM_INTERFACE_INTERFACE, path);
if (!l_dbus_object_add_interface(dbus, path,
L_DBUS_INTERFACE_PROPERTIES,
NULL))
l_info("Unable to add the %s interface to %s",
L_DBUS_INTERFACE_PROPERTIES, path);
} else {
/* Emit property change events */
if (memcmp(prev_rec.addr, rec->addr, ETH_ALEN))
l_dbus_property_changed(dbus, path,
HWSIM_INTERFACE_INTERFACE,
"Address");
if (name_change)
l_dbus_property_changed(dbus, path,
HWSIM_INTERFACE_INTERFACE,
"Name");
}
radio_rec->ap_only = radio_ap_only(radio_rec);
}
static bool interface_info_destroy_by_radio(void *data, void *user_data)
{
struct interface_info_rec *rec = data;
struct radio_info_rec *radio_rec = user_data;
if (rec->radio_rec != radio_rec)
return false;
l_dbus_unregister_object(dbus, interface_get_path(rec));
interface_free(rec);
return true;
}
static void del_radio_event(struct l_genl_msg *msg)
{
struct radio_info_rec *radio;
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
const int32_t *id = NULL;
if (!l_genl_attr_init(&attr, msg))
return;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_RADIO_ID:
if (len != 4)
break;
id = data;
if (L_WARN_ON(*id < 0))
return;
break;
}
}
if (!id)
return;
radio = l_queue_find(radio_info, radio_info_match_id,
L_INT_TO_PTR(*id));
if (!radio)
return;
l_queue_foreach_remove(interface_info, interface_info_destroy_by_radio,
radio);
l_dbus_unregister_object(dbus, radio_get_path(radio));
l_queue_remove(radio_info, radio);
radio_free(radio);
}
static void set_interface_event(struct l_genl_msg *msg)
{
struct interface_info_rec *interface;
uint32_t ifindex;
uint32_t iftype;
if (nl80211_parse_attrs(msg, NL80211_ATTR_IFINDEX, &ifindex,
NL80211_ATTR_IFTYPE, &iftype,
NL80211_ATTR_UNSPEC) < 0)
return;
interface = l_queue_find(interface_info, interface_info_match_id,
L_UINT_TO_PTR(ifindex));
if (!interface)
return;
if (interface->iftype == iftype)
return;
l_debug("Interface iftype changed for ifindex: %u, iftype: %u",
ifindex, iftype);
interface->iftype = iftype;
interface->radio_rec->ap_only = radio_ap_only(interface->radio_rec);
}
static void del_interface_event(struct l_genl_msg *msg)
{
struct interface_info_rec *interface;
uint32_t ifindex;
if (nl80211_parse_attrs(msg, NL80211_ATTR_IFINDEX, &ifindex,
NL80211_ATTR_UNSPEC) < 0)
return;
interface = l_queue_find(interface_info, interface_info_match_id,
L_UINT_TO_PTR(ifindex));
if (!interface)
return;
l_dbus_unregister_object(dbus, interface_get_path(interface));
l_queue_remove(interface_info, interface);
interface_free(interface);
}
static void hwsim_config(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
uint8_t cmd;
cmd = l_genl_msg_get_command(msg);
l_debug("Config changed cmd %u", cmd);
if (!l_genl_attr_init(&attr, msg))
return;
while (l_genl_attr_next(&attr, &type, &len, &data))
l_debug("\tattr type %d len %d", type, len);
switch (cmd) {
case HWSIM_CMD_NEW_RADIO:
get_radio_callback(msg, NULL);
break;
case HWSIM_CMD_DEL_RADIO:
del_radio_event(msg);
break;
}
}
static void nl80211_config_notify(struct l_genl_msg *msg, void *user_data)
{
uint8_t cmd = l_genl_msg_get_command(msg);
l_debug("Config notification %s(%u)", nl80211cmd_to_string(cmd), cmd);
switch (cmd) {
case NL80211_CMD_NEW_WIPHY:
get_wiphy_callback(msg, NULL);
break;
case NL80211_CMD_NEW_INTERFACE:
get_interface_callback(msg, NULL);
break;
case NL80211_CMD_SET_INTERFACE:
set_interface_event(msg);
break;
case NL80211_CMD_DEL_INTERFACE:
del_interface_event(msg);
break;
}
}
static void rtnl_newlink_notify(const struct ifinfomsg *ifi, int bytes)
{
struct rtattr *attr;
struct interface_info_rec *rec;
bool addr_change = false, name_change = false;
const char *path;
rec = l_queue_find(interface_info, interface_info_match_id,
L_UINT_TO_PTR(ifi->ifi_index));
if (!rec)
return;
for (attr = IFLA_RTA(ifi); RTA_OK(attr, bytes);
attr = RTA_NEXT(attr, bytes)) {
switch (attr->rta_type) {
case IFLA_IFNAME:
if (!strcmp(rec->name, RTA_DATA(attr)))
continue;
name_change = true;
l_free(rec->name);
rec->name = l_strdup(RTA_DATA(attr));
break;
case IFLA_ADDRESS:
if (RTA_PAYLOAD(attr) < ETH_ALEN)
break;
if (!memcmp(rec->addr, RTA_DATA(attr), ETH_ALEN))
continue;
addr_change = true;
memcpy(rec->addr, RTA_DATA(attr), ETH_ALEN);
break;
}
}
if (!addr_change && !name_change)
return;
path = interface_get_path(rec);
if (addr_change)
l_dbus_property_changed(dbus, path, HWSIM_INTERFACE_INTERFACE,
"Address");
if (name_change)
l_dbus_property_changed(dbus, path, HWSIM_INTERFACE_INTERFACE,
"Name");
}
static void rtnl_link_notify(uint16_t type, const void *data, uint32_t len,
void *user_data)
{
const struct ifinfomsg *ifi = data;
unsigned int bytes;
if (ifi->ifi_type != ARPHRD_ETHER)
return;
bytes = len - NLMSG_ALIGN(sizeof(struct ifinfomsg));
switch (type) {
case RTM_NEWLINK:
rtnl_newlink_notify(ifi, bytes);
break;
}
}
struct hwsim_tx_info {
int8_t idx;
uint8_t count;
};
struct hwsim_frame {
int refcount;
uint8_t src_ether_addr[ETH_ALEN];
uint8_t dst_ether_addr[ETH_ALEN];
struct radio_info_rec *src_radio;
struct radio_info_rec *ack_radio;
uint32_t flags;
const uint64_t *cookie;
int32_t signal;
uint32_t frequency;
uint16_t tx_info_len;
const struct hwsim_tx_info *tx_info;
uint16_t payload_len;
const uint8_t *payload;
bool acked;
struct l_genl_msg *msg;
int pending_callback_count;
};
static bool radio_match_addr(const struct radio_info_rec *radio,
const uint8_t *addr)
{
if (!radio || util_is_broadcast_address(addr))
return !radio && util_is_broadcast_address(addr);
return !memcmp(addr, radio->addrs[0], ETH_ALEN) ||
!memcmp(addr, radio->addrs[1], ETH_ALEN);
}
static void process_rules(const struct radio_info_rec *src_radio,
const struct radio_info_rec *dst_radio,
struct hwsim_frame *frame, bool ack, bool *drop,
uint32_t *delay)
{
const struct l_queue_entry *rule_entry;
for (rule_entry = l_queue_get_entries(rules); rule_entry;
rule_entry = rule_entry->next) {
struct hwsim_rule *rule = rule_entry->data;
if (!rule->enabled)
continue;
if (!rule->source_any &&
!radio_match_addr(src_radio, rule->source) &&
(!rule->bidirectional ||
!radio_match_addr(dst_radio, rule->source)))
continue;
if (!rule->destination_any &&
!radio_match_addr(dst_radio,
rule->destination) &&
(!rule->bidirectional ||
!radio_match_addr(src_radio,
rule->destination)))
continue;
/*
* If source matches only because rule->bidirectional was
* true, make sure destination is "any" or matches source
* radio's address.
*/
if (!rule->source_any && rule->bidirectional &&
radio_match_addr(dst_radio, rule->source))
if (!rule->destination_any &&
!radio_match_addr(dst_radio,
rule->destination))
continue;
if (rule->frequency && rule->frequency != frame->frequency)
continue;
if (rule->prefix && frame->payload_len >= rule->prefix_len) {
if (memcmp(rule->prefix, frame->payload,
rule->prefix_len) != 0)
continue;
}
if (rule->match && frame->payload_len >=
rule->match_len + rule->match_offset) {
if (memcmp(rule->match,
frame->payload + rule->match_offset,
rule->match_len))
continue;
}
/* Rule deemed to match frame, apply any changes */
if (rule->match_times == 0)
continue;
if (rule->signal)
frame->signal = rule->signal / 100;
/* Don't drop if this is an ACK, unless drop_ack is set */
if (!ack || (ack && rule->drop_ack))
*drop = rule->drop;
if (delay)
*delay = rule->delay;
if (rule->match_times > 0)
rule->match_times--;
}
}
struct send_frame_info {
struct hwsim_frame *frame;
struct radio_info_rec *radio;
void *user_data;
};
static bool send_frame_tx_info(struct hwsim_frame *frame)
{
struct l_genl_msg *msg;
msg = l_genl_msg_new_sized(HWSIM_CMD_TX_INFO_FRAME,
128 + frame->tx_info_len);
l_genl_msg_append_attr(msg, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN,
frame->src_radio->addrs[1]);
l_genl_msg_append_attr(msg, HWSIM_ATTR_FLAGS, 4, &frame->flags);
l_genl_msg_append_attr(msg, HWSIM_ATTR_SIGNAL, 4, &frame->signal);
l_genl_msg_append_attr(msg, HWSIM_ATTR_COOKIE, 8, frame->cookie);
l_genl_msg_append_attr(msg, HWSIM_ATTR_TX_INFO, frame->tx_info_len,
frame->tx_info);
if (!l_genl_family_send(hwsim, msg, NULL, NULL, NULL)) {
l_error("Sending HWSIM_CMD_TX_INFO_FRAME failed");
return false;
}
return true;
}
static bool send_frame(struct send_frame_info *info,
l_genl_msg_func_t callback,
l_genl_destroy_func_t destroy)
{
struct l_genl_msg *msg;
uint32_t rx_rate = 2;
unsigned int id;
msg = l_genl_msg_new_sized(HWSIM_CMD_FRAME,
128 + info->frame->payload_len);
l_genl_msg_append_attr(msg, HWSIM_ATTR_ADDR_RECEIVER, ETH_ALEN,
info->radio->addrs[1]);
l_genl_msg_append_attr(msg, HWSIM_ATTR_FRAME, info->frame->payload_len,
info->frame->payload);
l_genl_msg_append_attr(msg, HWSIM_ATTR_RX_RATE, 4,
&rx_rate);
l_genl_msg_append_attr(msg, HWSIM_ATTR_SIGNAL, 4,
&info->frame->signal);
l_genl_msg_append_attr(msg, HWSIM_ATTR_FREQ, 4,
&info->frame->frequency);
id = l_genl_family_send(hwsim, msg, callback, info, destroy);
if (!id) {
l_error("Sending HWSIM_CMD_FRAME failed");
return false;
}
return true;
}
static struct hwsim_frame *hwsim_frame_ref(struct hwsim_frame *frame)
{
__sync_fetch_and_add(&frame->refcount, 1);
return frame;
}
static void hwsim_frame_unref(struct hwsim_frame *frame)
{
if (__sync_sub_and_fetch(&frame->refcount, 1))
return;
if (!frame->pending_callback_count) {
/*
* Apparently done with this frame, send tx info and signal
* the returning of an ACK frame in the opposite direction.
*/
if (!(frame->flags & HWSIM_TX_CTL_NO_ACK) && frame->acked) {
bool drop = false;
process_rules(frame->ack_radio, frame->src_radio,
frame, true, &drop, NULL);
if (!drop)
frame->flags |= HWSIM_TX_STAT_ACK;
}
if (frame->src_radio)
send_frame_tx_info(frame);
}
l_genl_msg_unref(frame->msg);
l_free(frame);
}
static void send_frame_callback(struct l_genl_msg *msg, void *user_data)
{
struct send_frame_info *info = user_data;
if (l_genl_msg_get_error(msg) == 0) {
info->frame->acked = true;
info->frame->ack_radio = info->radio;
}
info->frame->pending_callback_count--;
}
static void send_frame_destroy(void *user_data)
{
struct send_frame_info *info = user_data;
hwsim_frame_unref(info->frame);
l_free(info);
}
static void send_custom_frame_callback(struct l_genl_msg *msg, void *user_data)
{
struct send_frame_info *info = user_data;
struct l_dbus_message *message = info->user_data;
struct l_dbus_message *reply;
info->user_data = NULL;
if (l_genl_msg_get_error(msg) < 0) {
/* Radio address or frequency didn't match */
l_debug("HWSIM_CMD_FRAME failed for destination %s: %d",
util_address_to_string(info->radio->addrs[0]),
l_genl_msg_get_error(msg));
dbus_pending_reply(&message, dbus_error_invalid_args(message));
return;
}
reply = l_dbus_message_new_method_return(message);
l_dbus_message_set_arguments(reply, "");
dbus_pending_reply(&message, reply);
}
static void send_custom_frame_destroy(void *user_data)
{
struct send_frame_info *info = user_data;
if (info->user_data)
l_dbus_message_unref(info->user_data);
l_free(info->frame);
l_free(info);
}
static bool send_custom_frame(const uint8_t *addr, uint32_t freq,
int32_t signal, const void *payload, uint32_t len,
void *user_data)
{
struct hwsim_frame *frame = l_new(struct hwsim_frame, 1);
struct send_frame_info *info = l_new(struct send_frame_info, 1);
frame->frequency = freq;
frame->signal = signal;
frame->payload_len = len;
frame->payload = payload;
info->frame = frame;
info->user_data = user_data;
info->radio = l_queue_find(radio_info, radio_info_match_addr0, addr) ?:
l_queue_find(radio_info, radio_info_match_addr1, addr);
if (!info->radio)
goto error;
if (!send_frame(info, send_custom_frame_callback,
send_custom_frame_destroy))
goto error;
return true;
error:
l_free(frame);
l_free(info);
return false;
}
static void frame_delay_callback(struct l_timeout *timeout, void *user_data)
{
struct send_frame_info *send_info = user_data;
if (send_frame(send_info, send_frame_callback,
send_frame_destroy))
send_info->frame->pending_callback_count++;
else
send_frame_destroy(send_info);
if (timeout)
l_timeout_remove(timeout);
}
/*
* Process frames in a similar way to how the kernel built-in hwsim medium
* does this, with an additional optimization for unicast frames and
* additional modifications to frames decided by user-configurable rules.
*/
static void process_frame(struct hwsim_frame *frame)
{
const struct l_queue_entry *entry;
bool drop_mcast = false;
bool beacon = false;
if (util_is_broadcast_address(frame->dst_ether_addr))
process_rules(frame->src_radio, NULL, frame, false,
&drop_mcast, NULL);
if (frame->payload_len >= 2 &&
frame->payload[0] == 0x80 &&
frame->payload[1] == 0x00)
beacon = true;
for (entry = l_queue_get_entries(radio_info); entry;
entry = entry->next) {
struct radio_info_rec *radio = entry->data;
struct send_frame_info *send_info;
bool drop = drop_mcast;
uint32_t delay = 0;
const struct l_queue_entry *i;
if (radio == frame->src_radio)
continue;
/*
* The kernel hwsim medium passes multicast frames to all
* radios that are on the same frequency as this frame but
* the netlink medium API only lets userspace pass frames to
* radios by known hardware address. It does check that the
* receiving radio is on the same frequency though so we can
* send to all known addresses.
*
* If the frame's Receiver Address (RA) is a multicast
* address, then send the frame to every radio that is
* registered. If it's a unicast address then optimize
* by only forwarding the frame to the radios that have
* at least one interface with this specific address.
*/
if (!util_is_broadcast_address(frame->dst_ether_addr)) {
for (i = l_queue_get_entries(interface_info);
i; i = i->next) {
struct interface_info_rec *interface = i->data;
if (interface->radio_rec != radio)
continue;
if (!memcmp(interface->addr,
frame->dst_ether_addr,
ETH_ALEN))
break;
}
if (!i)
continue;
}
process_rules(frame->src_radio, radio, frame, false,
&drop, &delay);
if (drop)
continue;
/*
* Don't bother sending beacons to other AP interfaces
* if the AP interface is the only one on this phy
*/
if (beacon && radio->ap_only)
continue;
send_info = l_new(struct send_frame_info, 1);
send_info->radio = radio;
send_info->frame = hwsim_frame_ref(frame);
if (delay) {
if (!l_timeout_create_ms(delay, frame_delay_callback,
send_info, NULL)) {
l_error("Error delaying frame %ums, "
"frame will be dropped", delay);
send_frame_destroy(send_info);
}
} else
frame_delay_callback(NULL, send_info);
}
hwsim_frame_unref(frame);
}
static void hwsim_frame_event(struct l_genl_msg *msg)
{
struct hwsim_frame *frame;
const struct mmpdu_header *mpdu;
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
const uint8_t *transmitter = NULL, *freq = NULL, *flags = NULL;
if (!l_genl_attr_init(&attr, msg))
return;
frame = l_new(struct hwsim_frame, 1);
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_ADDR_TRANSMITTER:
if (len != ETH_ALEN)
break;
transmitter = data;
break;
case HWSIM_ATTR_FREQ:
if (len != 4)
break;
freq = data;
break;
case HWSIM_ATTR_FLAGS:
if (len != 4)
break;
flags = data;
break;
case HWSIM_ATTR_COOKIE:
if (len != 8)
break;
frame->cookie = (const uint64_t *) data;
break;
case HWSIM_ATTR_FRAME:
if (len > IEEE80211_MAX_DATA_LEN)
break;
/* Duration + Address1 + Address2 + Address3 + SeqCtl */
if (len < sizeof(struct mpdu_fc) + 22) {
l_error("Frame payload too short for header");
break;
}
frame->payload_len = len;
frame->payload = data;
break;
case HWSIM_ATTR_TX_INFO:
if (len > sizeof(struct hwsim_tx_info) *
IEEE80211_TX_RATE_TABLE_SIZE)
break;
frame->tx_info_len = len;
frame->tx_info = data;
break;
default:
if (type >= __HWSIM_ATTR_MAX)
l_warn("Unknown attribute type: %u", type);
break;
}
}
if (!frame->payload || !frame->tx_info || !frame->cookie ||
!flags || !freq || !transmitter) {
l_error("Incomplete HWSIM_CMD_FRAME");
l_free(frame);
return;
}
frame->signal = -30;
frame->msg = l_genl_msg_ref(msg);
frame->refcount = 1;
frame->src_radio = l_queue_find(radio_info, radio_info_match_addr1,
transmitter);
if (!frame->src_radio) {
l_error("Unknown transmitter address %s, probably need to "
"update radio dump code for this kernel",
util_address_to_string(transmitter));
hwsim_frame_unref(frame);
return;
}
frame->frequency = *(uint32_t *) freq;
frame->flags = *(uint32_t *) flags;
mpdu = (const struct mmpdu_header *) frame->payload;
memcpy(frame->src_ether_addr, mpdu->address_2, ETH_ALEN);
memcpy(frame->dst_ether_addr, mpdu->address_1, ETH_ALEN);
process_frame(frame);
}
static bool get_tx_rx_addrs(struct l_genl_msg *msg, const uint8_t **tx_out,
const uint8_t **rx_out)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
const uint8_t *tx = NULL, *rx = NULL;
if (!l_genl_attr_init(&attr, msg))
return false;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case HWSIM_ATTR_ADDR_TRANSMITTER:
if (len != ETH_ALEN)
return false;
tx = data;
break;
case HWSIM_ATTR_ADDR_RECEIVER:
if (len != ETH_ALEN)
return false;
rx = data;
break;
default:
break;
}
}
if (!tx || !rx)
return false;
*tx_out = tx;
*rx_out = rx;
return true;
}
static void hwsim_add_mac_event(struct l_genl_msg *msg)
{
const uint8_t *tx = NULL, *rx = NULL;
struct radio_info_rec *radio_rec;
struct interface_info_rec *interface_rec;
if (!get_tx_rx_addrs(msg, &tx, &rx))
return;
/* No radio matches the TX address, hwsim must not have created it */
radio_rec = l_queue_find(radio_info, radio_info_match_addr1, tx);
if (!radio_rec)
return;
interface_rec = l_queue_find(interface_info,
interface_info_match_addr, rx);
if (interface_rec) {
/* Existing interface, address changes handled via nl80211 */
if (interface_rec->name)
return;
/*
* Transient/dummy interface we already know about. This likely
* was created, then a scan changed the address temporarily.
* Reflect this change and increment the ref so the following
* DEL event doesn't destroy it
*/
__atomic_fetch_add(&interface_rec->ref, 1, __ATOMIC_SEQ_CST);
return;
}
/*
* Create a dummy interface entry for this address that only contains
* the radio and address. This is either a transient entry due to scan
* randomization or an interface created outside this namespace.
*/
interface_rec = l_new(struct interface_info_rec, 1);
interface_rec->radio_rec = radio_rec;
interface_rec->ref = 1;
memcpy(interface_rec->addr, rx, ETH_ALEN);
l_queue_push_tail(interface_info, interface_rec);
}
static void hwsim_del_mac_event(struct l_genl_msg *msg)
{
const uint8_t *tx = NULL, *rx = NULL;
struct radio_info_rec *radio_rec;
struct interface_info_rec *interface_rec;
if (!get_tx_rx_addrs(msg, &tx, &rx))
return;
/* No radio matches the TX address, hwsim must not have created it */
radio_rec = l_queue_find(radio_info, radio_info_match_addr1, tx);
if (!radio_rec)
return;
interface_rec = l_queue_find(interface_info,
interface_info_match_addr, rx);
if (!interface_rec)
return;
/*
* This change is handled via nl80211 so we don't want to touch this
* interface here.
*/
if (interface_rec->name)
return;
if (__atomic_sub_fetch(&interface_rec->ref, 1, __ATOMIC_SEQ_CST))
return;
l_queue_remove(interface_info, interface_rec);
l_free(interface_rec);
}
static void hwsim_unicast_handler(struct l_genl_msg *msg, void *user_data)
{
uint8_t cmd;
if (l_genl_msg_get_error(msg) < 0)
return;
cmd = l_genl_msg_get_command(msg);
switch (cmd) {
case HWSIM_CMD_FRAME:
hwsim_frame_event(msg);
break;
case HWSIM_CMD_ADD_MAC_ADDR:
hwsim_add_mac_event(msg);
break;
case HWSIM_CMD_DEL_MAC_ADDR:
hwsim_del_mac_event(msg);
break;
default:
break;
}
}
static void radio_manager_create_callback(struct l_genl_msg *msg,
void *user_data)
{
struct radio_info_rec *radio = user_data;
struct l_dbus_message *reply;
radio->cmd_id = 0;
if (l_genl_msg_get_error(msg) >= 0)
return;
/*
* In theory pending should always be set. This is to handle the
* NEW_RADIO event coming prior to this callback and this callback
* also having an error. It doesn't seem possible for this to happen,
* but who knows.
*/
if (radio->pending) {
reply = dbus_error_failed(radio->pending);
dbus_pending_reply(&radio->pending, reply);
}
l_queue_remove(radio_info, radio);
radio_free(radio);
}
static struct l_dbus_message *radio_manager_create(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct l_genl_msg *new_msg;
struct l_dbus_message_iter dict;
struct l_dbus_message_iter variant;
const char *key;
const char *name = NULL;
bool p2p = false;
const char *disabled_iftypes = NULL;
const char *disabled_ciphers = NULL;
bool no_vif = false;
struct radio_info_rec *radio;
if (!l_dbus_message_get_arguments(message, "a{sv}", &dict))
goto invalid;
while (l_dbus_message_iter_next_entry(&dict, &key, &variant)) {
bool ret = false;
if (!strcmp(key, "Name"))
ret = l_dbus_message_iter_get_variant(&variant,
"s", &name);
else if (!strcmp(key, "P2P"))
ret = l_dbus_message_iter_get_variant(&variant,
"b", &p2p);
else if (!strcmp(key, "InterfaceTypeDisable"))
ret = l_dbus_message_iter_get_variant(&variant, "s",
&disabled_iftypes);
else if (!strcmp(key, "CipherTypeDisable"))
ret = l_dbus_message_iter_get_variant(&variant, "s",
&disabled_ciphers);
else if (!strcmp(key, "NoVirtualInterface"))
ret = l_dbus_message_iter_get_variant(&variant, "b",
&no_vif);
if (!ret)
goto invalid;
}
if (!name)
goto invalid;
new_msg = l_genl_msg_new(HWSIM_CMD_NEW_RADIO);
l_genl_msg_append_attr(new_msg, HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
0, NULL);
l_genl_msg_append_attr(new_msg, HWSIM_ATTR_RADIO_NAME,
strlen(name) + 1, name);
if (p2p)
l_genl_msg_append_attr(new_msg, HWSIM_ATTR_SUPPORT_P2P_DEVICE,
0, NULL);
if (disabled_iftypes) {
hwsim_disable_support(disabled_iftypes, iftype_map,
&hwsim_iftypes);
if (hwsim_iftypes != HWSIM_DEFAULT_IFTYPES)
l_genl_msg_append_attr(new_msg,
HWSIM_ATTR_IFTYPE_SUPPORT,
4, &hwsim_iftypes);
}
if (disabled_ciphers) {
hwsim_disable_ciphers(disabled_ciphers);
if (hwsim_num_ciphers)
l_genl_msg_append_attr(new_msg, HWSIM_ATTR_CIPHER_SUPPORT,
sizeof(uint32_t) * hwsim_num_ciphers,
hwsim_ciphers);
}
if (no_vif)
l_genl_msg_append_attr(new_msg, HWSIM_ATTR_NO_VIF, 0, NULL);
radio = l_new(struct radio_info_rec, 1);
radio->pending = l_dbus_message_ref(message);
radio->name = l_strdup(name);
radio->id = -1;
if (!radio_info)
radio_info = l_queue_new();
l_queue_push_tail(radio_info, radio);
radio->cmd_id = l_genl_family_send(hwsim, new_msg,
radio_manager_create_callback,
radio, NULL);
return NULL;
invalid:
return dbus_error_invalid_args(message);
}
static void setup_radio_manager_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_method(interface, "CreateRadio", 0,
radio_manager_create, "o", "a{sv}",
"path", "name", "p2p_device");
}
static void radio_destroy_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_dbus_message *message = user_data;
struct l_dbus_message *reply;
struct l_genl_attr attr;
int err;
if (l_genl_attr_init(&attr, msg))
goto error;
err = l_genl_msg_get_error(msg);
if (err < 0)
goto error;
reply = l_dbus_message_new_method_return(message);
l_dbus_message_set_arguments(reply, "");
dbus_pending_reply(&message, reply);
return;
error:
reply = dbus_error_failed(message);
dbus_pending_reply(&message, reply);
}
static struct l_dbus_message *radio_destroy(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct l_genl_msg *del_msg;
struct radio_info_rec *radio = user_data;
del_msg = l_genl_msg_new_sized(HWSIM_CMD_DEL_RADIO, 8);
l_genl_msg_append_attr(del_msg, HWSIM_ATTR_RADIO_ID, 4, &radio->id);
l_genl_family_send(hwsim, del_msg, radio_destroy_callback,
l_dbus_message_ref(message), NULL);
return NULL;
}
static bool radio_property_get_name(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
l_dbus_message_builder_append_basic(builder, 's', rec->name);
return true;
}
static bool radio_property_get_addresses(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
unsigned int i;
l_dbus_message_builder_enter_array(builder, "s");
for (i = 0; i < sizeof(rec->addrs) / ETH_ALEN; i++) {
const char *str = util_address_to_string(rec->addrs[i]);
l_dbus_message_builder_append_basic(builder, 's', str);
}
l_dbus_message_builder_leave_array(builder);
return true;
}
static bool radio_property_get_channels(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
uint16_t val = rec->channels;
l_dbus_message_builder_append_basic(builder, 'q', &val);
return true;
}
static bool radio_property_get_alpha2(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
if (rec->alpha2[0] == 0 || rec->alpha2[1] == 0)
return false;
l_dbus_message_builder_enter_struct(builder, "yy");
l_dbus_message_builder_append_basic(builder, 'y', &rec->alpha2[0]);
l_dbus_message_builder_append_basic(builder, 'y', &rec->alpha2[1]);
l_dbus_message_builder_leave_struct(builder);
return true;
}
static bool radio_property_get_p2p(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
bool val = rec->p2p;
l_dbus_message_builder_append_basic(builder, 'b', &val);
return true;
}
static bool radio_property_get_regdom(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct radio_info_rec *rec = user_data;
if (!rec->custom_regdom)
return false;
l_dbus_message_builder_append_basic(builder, 'u', &rec->regdom_idx);
return true;
}
static void setup_radio_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_method(interface, "Destroy", 0, radio_destroy, "", "");
l_dbus_interface_property(interface, "Name", 0, "s",
radio_property_get_name, NULL);
l_dbus_interface_property(interface, "Addresses", 0, "as",
radio_property_get_addresses, NULL);
l_dbus_interface_property(interface, "Channels", 0, "q",
radio_property_get_channels, NULL);
l_dbus_interface_property(interface, "Alpha2", 0, "(yy)",
radio_property_get_alpha2, NULL);
l_dbus_interface_property(interface, "P2PDevice", 0, "b",
radio_property_get_p2p, NULL);
l_dbus_interface_property(interface, "RegulatoryDomainIndex", 0, "u",
radio_property_get_regdom, NULL);
}
static struct l_dbus_message *interface_send_frame(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct l_dbus_message_iter addr;
struct l_dbus_message_iter data;
const void *frame;
const uint8_t *receiver;
uint32_t len;
uint32_t freq;
int32_t signal;
if (!l_dbus_message_get_arguments(message, "ayuiay", &addr, &freq,
&signal, &data))
goto invalid_args;
if (!l_dbus_message_iter_get_fixed_array(&addr,
(const void **)&receiver, &len))
goto invalid_args;
if (len != 6)
goto invalid_args;
if (!l_dbus_message_iter_get_fixed_array(&data, &frame, &len))
goto invalid_args;
if (!send_custom_frame(receiver, freq, signal, frame, len,
l_dbus_message_ref(message))) {
l_dbus_message_unref(message);
goto invalid_args;
}
return NULL;
invalid_args:
return dbus_error_invalid_args(message);
}
static bool interface_property_get_name(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct interface_info_rec *rec = user_data;
l_dbus_message_builder_append_basic(builder, 's', rec->name);
return true;
}
static bool interface_property_get_address(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
const struct interface_info_rec *rec = user_data;
const char *str = util_address_to_string(rec->addr);
l_dbus_message_builder_append_basic(builder, 's', str);
return true;
}
static void setup_interface_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_method(interface, "SendFrame", 0,
interface_send_frame, "", "ayuiay", "station",
"frequency", "signal", "frame");
l_dbus_interface_property(interface, "Name", 0, "s",
interface_property_get_name, NULL);
l_dbus_interface_property(interface, "Address", 0, "s",
interface_property_get_address, NULL);
}
static int rule_compare_priority(const void *a, const void *b, void *user)
{
const struct hwsim_rule *rule_a = a;
const struct hwsim_rule *rule_b = b;
return (rule_a->priority > rule_b->priority) ? 1 : -1;
}
static struct l_dbus_message *rule_add(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct hwsim_rule *rule;
const char *path;
struct l_dbus_message *reply;
rule = l_new(struct hwsim_rule, 1);
rule->id = next_rule_id++;
rule->source_any = true;
rule->destination_any = true;
rule->delay = 0;
rule->enabled = false;
rule->match_times = -1;
rule->drop_ack = true;
if (!rules)
rules = l_queue_new();
l_queue_insert(rules, rule, rule_compare_priority, NULL);
path = rule_get_path(rule);
if (!l_dbus_object_add_interface(dbus, path,
HWSIM_RULE_INTERFACE, rule))
l_info("Unable to add the %s interface to %s",
HWSIM_RULE_INTERFACE, path);
if (!l_dbus_object_add_interface(dbus, path,
L_DBUS_INTERFACE_PROPERTIES, NULL))
l_info("Unable to add the %s interface to %s",
L_DBUS_INTERFACE_PROPERTIES, path);
reply = l_dbus_message_new_method_return(message);
l_dbus_message_set_arguments(reply, "o", path);
return reply;
}
static void setup_rule_manager_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_method(interface, "AddRule", 0,
rule_add, "o", "", "path");
}
static void destroy_rule(void *user_data)
{
struct hwsim_rule *rule = user_data;
if (rule->prefix)
l_free(rule->prefix);
if (rule->match)
l_free(rule->match);
l_free(rule);
}
static struct l_dbus_message *rule_remove(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct hwsim_rule *rule = user_data;
const char *path;
path = rule_get_path(rule);
l_queue_remove(rules, rule);
destroy_rule(rule);
l_dbus_unregister_object(dbus, path);
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_source(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
const char *str;
if (rule->source_any)
str = "any";
else
str = util_address_to_string(rule->source);
l_dbus_message_builder_append_basic(builder, 's', str);
return true;
}
static struct l_dbus_message *rule_property_set_source(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
const char *str;
if (!l_dbus_message_iter_get_variant(new_value, "s", &str))
return dbus_error_invalid_args(message);
if (!strcmp(str, "any"))
rule->source_any = true;
else {
if (!util_string_to_address(str, rule->source))
return dbus_error_invalid_args(message);
rule->source_any = false;
}
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_destination(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
const char *str;
if (rule->destination_any)
str = "any";
else if (util_is_broadcast_address(rule->destination))
str = "multicast";
else
str = util_address_to_string(rule->destination);
l_dbus_message_builder_append_basic(builder, 's', str);
return true;
}
static struct l_dbus_message *rule_property_set_destination(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
const char *str;
if (!l_dbus_message_iter_get_variant(new_value, "s", &str))
return dbus_error_invalid_args(message);
if (!strcmp(str, "any"))
rule->destination_any = true;
else if (!strcmp(str, "multicast")) {
rule->destination[0] = 0x80;
rule->destination_any = false;
} else {
if (!util_string_to_address(str, rule->destination))
return dbus_error_invalid_args(message);
rule->destination_any = false;
}
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_bidirectional(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval = rule->bidirectional;
l_dbus_message_builder_append_basic(builder, 'b', &bval);
return true;
}
static struct l_dbus_message *rule_property_set_bidirectional(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval;
if (!l_dbus_message_iter_get_variant(new_value, "b", &bval))
return dbus_error_invalid_args(message);
rule->bidirectional = bval;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_frequency(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
l_dbus_message_builder_append_basic(builder, 'u', &rule->frequency);
return true;
}
static struct l_dbus_message *rule_property_set_frequency(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
if (!l_dbus_message_iter_get_variant(new_value, "u", &rule->frequency))
return dbus_error_invalid_args(message);
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_priority(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
int16_t intval = rule->priority;
l_dbus_message_builder_append_basic(builder, 'n', &intval);
return true;
}
static struct l_dbus_message *rule_property_set_priority(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
int16_t intval;
if (!l_dbus_message_iter_get_variant(new_value, "n", &intval))
return dbus_error_invalid_args(message);
rule->priority = intval;
l_queue_remove(rules, rule);
l_queue_insert(rules, rule, rule_compare_priority, NULL);
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_signal(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
int16_t intval = rule->signal;
l_dbus_message_builder_append_basic(builder, 'n', &intval);
return true;
}
static struct l_dbus_message *rule_property_set_signal(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
int16_t intval;
if (!l_dbus_message_iter_get_variant(new_value, "n", &intval) ||
intval > 0 || intval < -10000)
return dbus_error_invalid_args(message);
rule->signal = intval;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_drop(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval = rule->drop;
l_dbus_message_builder_append_basic(builder, 'b', &bval);
return true;
}
static struct l_dbus_message *rule_property_set_drop(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval;
if (!l_dbus_message_iter_get_variant(new_value, "b", &bval))
return dbus_error_invalid_args(message);
rule->drop = bval;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_delay(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
l_dbus_message_builder_append_basic(builder, 'u', &rule->delay);
return true;
}
static struct l_dbus_message *rule_property_set_delay(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
uint32_t val;
if (!l_dbus_message_iter_get_variant(new_value, "u", &val) ||
val < HWSIM_DELAY_MIN_MS)
return dbus_error_invalid_args(message);
rule->delay = val;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_prefix(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
size_t i;
l_dbus_message_builder_enter_array(builder, "y");
for (i = 0; i < rule->prefix_len; i++)
l_dbus_message_builder_append_basic(builder, 'y',
rule->prefix + i);
l_dbus_message_builder_leave_array(builder);
return true;
}
static struct l_dbus_message *rule_property_set_prefix(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
struct l_dbus_message_iter iter;
const uint8_t *prefix;
uint32_t len;
if (!l_dbus_message_iter_get_variant(new_value, "ay", &iter))
goto invalid_args;
if (!l_dbus_message_iter_get_fixed_array(&iter,
(const void **)&prefix, &len))
goto invalid_args;
if (len > HWSIM_MAX_PREFIX_LEN)
goto invalid_args;
if (rule->prefix)
l_free(rule->prefix);
rule->prefix = l_memdup(prefix, len);
rule->prefix_len = len;
return l_dbus_message_new_method_return(message);
invalid_args:
return dbus_error_invalid_args(message);
}
static bool rule_property_get_match(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
size_t i;
l_dbus_message_builder_enter_array(builder, "y");
for (i = 0; i < rule->match_len; i++)
l_dbus_message_builder_append_basic(builder, 'y',
rule->match + i);
l_dbus_message_builder_leave_array(builder);
return true;
}
static struct l_dbus_message *rule_property_set_match(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
struct l_dbus_message_iter iter;
const uint8_t *match;
uint32_t len;
if (!l_dbus_message_iter_get_variant(new_value, "ay", &iter))
goto invalid_args;
if (!l_dbus_message_iter_get_fixed_array(&iter,
(const void **)&match, &len))
goto invalid_args;
if (len > HWSIM_MAX_PREFIX_LEN)
goto invalid_args;
if (rule->match)
l_free(rule->match);
rule->match = l_memdup(match, len);
rule->match_len = len;
return l_dbus_message_new_method_return(message);
invalid_args:
return dbus_error_invalid_args(message);
}
static bool rule_property_get_match_offset(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
uint16_t val = rule->match_offset;
l_dbus_message_builder_append_basic(builder, 'q', &val);
return true;
}
static struct l_dbus_message *rule_property_set_match_offset(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
uint16_t val;
if (!l_dbus_message_iter_get_variant(new_value, "q", &val))
return dbus_error_invalid_args(message);
rule->match_offset = val;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_enabled(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval = rule->enabled;
l_dbus_message_builder_append_basic(builder, 'b', &bval);
return true;
}
static struct l_dbus_message *rule_property_set_enabled(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval;
if (!l_dbus_message_iter_get_variant(new_value, "b", &bval))
return dbus_error_invalid_args(message);
rule->enabled = bval;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_match_times(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
uint16_t val = rule->match_times;
l_dbus_message_builder_append_basic(builder, 'q', &val);
return true;
}
static struct l_dbus_message *rule_property_set_match_times(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
uint16_t val;
if (!l_dbus_message_iter_get_variant(new_value, "q", &val))
return dbus_error_invalid_args(message);
rule->match_times = val;
return l_dbus_message_new_method_return(message);
}
static bool rule_property_get_drop_ack(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval = rule->drop_ack;
l_dbus_message_builder_append_basic(builder, 'b', &bval);
return true;
}
static struct l_dbus_message *rule_property_set_drop_ack(
struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct hwsim_rule *rule = user_data;
bool bval;
if (!l_dbus_message_iter_get_variant(new_value, "b", &bval))
return dbus_error_invalid_args(message);
rule->drop_ack = bval;
return l_dbus_message_new_method_return(message);
}
static void setup_rule_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_method(interface, "Remove", 0, rule_remove, "", "");
l_dbus_interface_property(interface, "Source",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "s",
rule_property_get_source,
rule_property_set_source);
l_dbus_interface_property(interface, "Destination",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "s",
rule_property_get_destination,
rule_property_set_destination);
l_dbus_interface_property(interface, "Bidirectional",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "b",
rule_property_get_bidirectional,
rule_property_set_bidirectional);
l_dbus_interface_property(interface, "Frequency",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "u",
rule_property_get_frequency,
rule_property_set_frequency);
l_dbus_interface_property(interface, "Priority",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "n",
rule_property_get_priority,
rule_property_set_priority);
l_dbus_interface_property(interface, "SignalStrength",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "n",
rule_property_get_signal,
rule_property_set_signal);
l_dbus_interface_property(interface, "Drop",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "b",
rule_property_get_drop,
rule_property_set_drop);
l_dbus_interface_property(interface, "Delay",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "u",
rule_property_get_delay,
rule_property_set_delay);
l_dbus_interface_property(interface, "Prefix",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "ay",
rule_property_get_prefix,
rule_property_set_prefix);
l_dbus_interface_property(interface, "MatchBytes",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "ay",
rule_property_get_match,
rule_property_set_match);
l_dbus_interface_property(interface, "MatchBytesOffset",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "q",
rule_property_get_match_offset,
rule_property_set_match_offset);
l_dbus_interface_property(interface, "Enabled",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "b",
rule_property_get_enabled,
rule_property_set_enabled);
l_dbus_interface_property(interface, "MatchTimes",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "q",
rule_property_get_match_times,
rule_property_set_match_times);
l_dbus_interface_property(interface, "DropAck",
L_DBUS_PROPERTY_FLAG_AUTO_EMIT, "b",
rule_property_get_drop_ack,
rule_property_set_drop_ack);
}
static void request_name_callback(struct l_dbus *dbus, bool success,
bool queued, void *user_data)
{
if (!success)
l_error("Name request failed");
}
static void ready_callback(void *user_data)
{
l_dbus_name_acquire(dbus, HWSIM_SERVICE, false, false, true,
request_name_callback, NULL);
if (!l_dbus_object_manager_enable(dbus, "/"))
l_info("Unable to register the ObjectManager");
}
static void disconnect_callback(void *user_data)
{
l_info("D-Bus disconnected, quitting...");
l_main_quit();
}
static bool setup_dbus_hwsim(void)
{
dbus = l_dbus_new_default(L_DBUS_SYSTEM_BUS);
if (!dbus) {
l_error("Unable to connect to Dbus");
return false;
}
if (!l_dbus_register_interface(dbus, HWSIM_RADIO_MANAGER_INTERFACE,
setup_radio_manager_interface,
NULL, false)) {
l_error("Unable to register the %s interface",
HWSIM_RADIO_MANAGER_INTERFACE);
return false;
}
if (!l_dbus_register_interface(dbus, HWSIM_RADIO_INTERFACE,
setup_radio_interface, NULL, false)) {
l_error("Unable to register the %s interface",
HWSIM_RADIO_INTERFACE);
return false;
}
if (!l_dbus_register_interface(dbus, HWSIM_INTERFACE_INTERFACE,
setup_interface_interface,
NULL, false)) {
l_error("Unable to register the %s interface",
HWSIM_INTERFACE_INTERFACE);
return false;
}
if (!l_dbus_register_interface(dbus, HWSIM_RULE_MANAGER_INTERFACE,
setup_rule_manager_interface,
NULL, false)) {
l_error("Unable to register the %s interface",
HWSIM_RULE_MANAGER_INTERFACE);
return false;
}
if (!l_dbus_register_interface(dbus, HWSIM_RULE_INTERFACE,
setup_rule_interface, NULL, false)) {
l_error("Unable to register the %s interface",
HWSIM_RULE_INTERFACE);
return false;
}
if (!l_dbus_object_add_interface(dbus, "/",
HWSIM_RADIO_MANAGER_INTERFACE,
NULL)) {
l_info("Unable to add the %s interface to /",
HWSIM_RADIO_MANAGER_INTERFACE);
return false;
}
if (!l_dbus_object_add_interface(dbus, "/",
HWSIM_RULE_MANAGER_INTERFACE,
NULL)) {
l_info("Unable to add the %s interface to /",
HWSIM_RULE_MANAGER_INTERFACE);
return false;
}
l_dbus_set_ready_handler(dbus, ready_callback, dbus, NULL);
l_dbus_set_disconnect_handler(dbus, disconnect_callback, NULL, NULL);
return true;
}
static void register_callback(struct l_genl_msg *msg, void *user_data)
{
int err = l_genl_msg_get_error(msg);
if (err < 0) {
l_error("HWSIM_CMD_REGISTER failed: %s (%d)",
strerror(-err), -err);
exit_status = EXIT_FAILURE;
l_main_quit();
return;
}
l_info("Registered as a transmission medium");
}
static void get_interface_done_initial(void *user_data)
{
struct l_genl_msg *msg;
if (no_register)
return;
msg = l_genl_msg_new_sized(HWSIM_CMD_REGISTER, 4);
l_genl_family_send(hwsim, msg, register_callback, NULL, NULL);
}
static void get_radio_done_initial(void *user_data)
{
struct l_genl_msg *msg;
/*
* Query interfaces now that we know we have all the radio data
* for radio lookups inside get_interface_callback, and we know
* nl80211_ready has already been called.
*/
msg = l_genl_msg_new(NL80211_CMD_GET_INTERFACE);
if (!l_genl_family_dump(nl80211, msg, get_interface_callback,
NULL, get_interface_done_initial)) {
l_error("Getting nl80211 interface information failed");
goto error;
}
if (!l_genl_family_register(nl80211, "config", nl80211_config_notify,
NULL, NULL)) {
l_error("Registering for nl80211 config notification "
"failed");
goto error;
}
rtnl = l_netlink_new(NETLINK_ROUTE);
if (!rtnl) {
l_error("Failed to open route netlink socket");
goto error;
}
if (!l_netlink_register(rtnl, RTNLGRP_LINK,
rtnl_link_notify, NULL, NULL)) {
l_error("Failed to register for RTNL link notifications");
goto error;
}
return;
error:
exit_status = EXIT_FAILURE;
l_main_quit();
}
static void hwsim_ready(void)
{
struct l_genl_msg *msg;
size_t msg_size;
uint32_t radio_id;
switch (action) {
case ACTION_LIST:
msg = l_genl_msg_new_sized(HWSIM_CMD_GET_RADIO,
options ? 8 : 4);
if (options) {
radio_id = atoi(options);
l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_ID,
4, &radio_id);
l_genl_family_send(hwsim, msg, list_callback,
NULL, list_callback_done);
} else {
l_genl_family_dump(hwsim, msg, list_callback,
NULL, list_callback_done);
}
break;
case ACTION_CREATE:
msg_size = 0;
if (radio_name_attr)
msg_size += strlen(radio_name_attr) + 8;
if (no_vif_attr)
msg_size += 4;
if (p2p_attr)
msg_size += 4;
msg = l_genl_msg_new_sized(HWSIM_CMD_NEW_RADIO, msg_size);
if (radio_name_attr)
l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_NAME,
strlen(radio_name_attr) + 1,
radio_name_attr);
if (no_vif_attr)
l_genl_msg_append_attr(msg, HWSIM_ATTR_NO_VIF, 0, NULL);
if (p2p_attr)
l_genl_msg_append_attr(msg,
HWSIM_ATTR_SUPPORT_P2P_DEVICE,
0, NULL);
if (hwsim_iftypes != HWSIM_DEFAULT_IFTYPES)
l_genl_msg_append_attr(msg, HWSIM_ATTR_IFTYPE_SUPPORT,
4, &hwsim_iftypes);
if (hwsim_num_ciphers)
l_genl_msg_append_attr(msg, HWSIM_ATTR_CIPHER_SUPPORT,
sizeof(uint32_t) * hwsim_num_ciphers,
hwsim_ciphers);
l_genl_family_send(hwsim, msg, create_callback, NULL, NULL);
break;
case ACTION_DESTROY:
radio_id = atoi(options);
msg = l_genl_msg_new_sized(HWSIM_CMD_DEL_RADIO, 8);
l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_ID, 4, &radio_id);
l_genl_family_send(hwsim, msg, destroy_callback, NULL, NULL);
break;
case ACTION_NONE:
if (!setup_dbus_hwsim())
goto error;
if (!l_genl_family_register(hwsim, "config", hwsim_config,
NULL, NULL)) {
l_error("Failed to create hwsim config listener\n");
goto error;
}
msg = l_genl_msg_new(HWSIM_CMD_GET_RADIO);
if (!l_genl_family_dump(hwsim, msg, get_radio_callback,
NULL, get_radio_done_initial)) {
l_error("Getting hwsim radio information failed");
goto error;
}
if (!l_genl_add_unicast_watch(genl, "MAC80211_HWSIM",
hwsim_unicast_handler,
NULL, NULL)) {
l_error("Failed to set hwsim unicast handler");
goto error;
}
break;
}
return;
error:
exit_status = EXIT_FAILURE;
l_main_quit();
}
static void family_discovered(const struct l_genl_family_info *info,
void *user_data)
{
if (!strcmp(l_genl_family_info_get_name(info), "MAC80211_HWSIM"))
hwsim = l_genl_family_new(genl, "MAC80211_HWSIM");
else if (!strcmp(l_genl_family_info_get_name(info), NL80211_GENL_NAME))
nl80211 = l_genl_family_new(genl, NL80211_GENL_NAME);
}
static void discovery_done(void *user_data)
{
if (!hwsim) {
fprintf(stderr, "MAC80211_HWSIM doesn't exist.\n"
"Load it manually using modprobe mac80211_hwsim\n");
goto quit;
}
if (!nl80211) {
fprintf(stderr, "nl80211 doesn't exist.\n"
"Load it manually using modprobe cfg80211\n");
goto quit;
}
hwsim_ready();
return;
quit:
exit_status = EXIT_FAILURE;
l_main_quit();
}
static void signal_handler(uint32_t signo, void *user_data)
{
switch (signo) {
case SIGINT:
case SIGTERM:
l_main_quit();
break;
}
}
static void usage(void)
{
printf("hwsim - Wireless simulator\n"
"Usage:\n");
printf("\thwsim [options]\n");
printf("Options:\n"
"\t-L, --list [id] List simulated radios\n"
"\t-C, --create Create new simulated radio\n"
"\t-D, --destroy <id> Destroy existing radio\n"
"\t-n, --name <name> Name of a radio to be created\n"
"\t-i, --nointerface Do not create VIF\n"
"\t-p, --p2p Support P2P\n"
"\t-t, --iftype-disable List of disabled iftypes\n"
"\t-c, --cipher-disable List of disabled ciphers\n"
"\t-h, --help Show help options\n");
}
static const struct option main_options[] = {
{ "list", optional_argument, NULL, 'L' },
{ "create", no_argument, NULL, 'C' },
{ "destroy", required_argument, NULL, 'D' },
{ "name", required_argument, NULL, 'n' },
{ "nointerface", no_argument, NULL, 'i' },
{ "p2p", no_argument, NULL, 'p' },
{ "version", no_argument, NULL, 'v' },
{ "iftype-disable", required_argument, NULL, 't' },
{ "cipher-disable", required_argument, NULL, 'c' },
{ "no-register", no_argument, NULL, 'r' },
{ "help", no_argument, NULL, 'h' },
{ }
};
int main(int argc, char *argv[])
{
int actions = 0;
for (;;) {
int opt;
opt = getopt_long(argc, argv, ":L:CD:kndetrc:ipvh", main_options,
NULL);
if (opt < 0)
break;
switch (opt) {
case ':':
if (optopt == 'L') {
action = ACTION_LIST;
actions++;
} else {
printf("option '-%c' requires an argument\n",
optopt);
return EXIT_FAILURE;
}
break;
case 'L':
action = ACTION_LIST;
options = optarg;
actions++;
break;
case 'C':
action = ACTION_CREATE;
actions++;
break;
case 'D':
action = ACTION_DESTROY;
options = optarg;
actions++;
break;
case 'n':
radio_name_attr = optarg;
break;
case 'i':
no_vif_attr = true;
break;
case 'p':
p2p_attr = true;
break;
case 't':
hwsim_disable_support(optarg, iftype_map,
&hwsim_iftypes);
break;
case 'c':
hwsim_disable_ciphers(optarg);
break;
case 'r':
no_register = true;
break;
case 'v':
printf("%s\n", VERSION);
return EXIT_SUCCESS;
case 'h':
usage();
return EXIT_SUCCESS;
default:
printf("unrecognized argument '%s'\n",
argv[optind - 1]);
return EXIT_FAILURE;
}
}
if (argc - optind > 0) {
fprintf(stderr, "Invalid command line parameters\n");
return EXIT_FAILURE;
}
if (actions > 1) {
fprintf(stderr, "Only one action can be specified\n");
return EXIT_FAILURE;
}
if (!l_main_init())
return EXIT_FAILURE;
l_log_set_stderr();
l_debug_enable("*");
exit_status = EXIT_FAILURE;
printf("Wireless simulator ver %s\n", VERSION);
genl = l_genl_new();
if (!genl) {
fprintf(stderr, "Failed to initialize generic netlink\n");
goto done;
}
if (getenv("HWSIM_DEBUG"))
l_genl_set_debug(genl, do_debug, "[GENL] ", NULL);
if (!l_genl_discover_families(genl, family_discovered, NULL,
discovery_done)) {
fprintf(stderr, "Unable to start family discovery\n");
l_genl_unref(genl);
goto done;
}
exit_status = l_main_run_with_signal(signal_handler, NULL);
l_genl_family_free(hwsim);
l_genl_family_free(nl80211);
l_genl_unref(genl);
l_dbus_destroy(dbus);
hwsim_radio_cache_cleanup();
l_queue_destroy(rules, destroy_rule);
l_netlink_destroy(rtnl);
done:
l_main_exit();
return exit_status;
}
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