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hwsim: add spoofing frame support

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Added a new method SendFrame() under the radios .Interface
interface. This method takes two byte arrays as parameters,
first is the station address to send the frame to, and the
second is the raw frame data.
This commit is contained in:
James Prestwood 2018-01-30 11:19:48 -08:00 committed by Denis Kenzior
parent 5447ba482a
commit f22ec55efb
1 changed files with 107 additions and 0 deletions
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107
tools/hwsim.c
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@ -1088,6 +1088,7 @@ static void process_rules(const struct radio_info_rec *src_radio,
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)
@ -1201,6 +1202,70 @@ static void send_frame_destroy(void *user_data)
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;
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;
l_free(info->frame);
l_free(info->radio);
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 radio_info_rec *radio = l_new(struct radio_info_rec, 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->radio = radio;
info->user_data = user_data;
memcpy(info->radio->addrs[0], addr, ETH_ALEN);
memcpy(info->radio->addrs[1], addr, ETH_ALEN);
/* hwsim expects the first nibble of the address byte to be '4' */
info->radio->addrs[1][0] |= 0x40;
if (!send_frame(info, send_custom_frame_callback,
send_custom_frame_destroy)) {
l_free(frame);
l_free(radio);
l_free(info);
return false;
}
return true;
}
struct interface_match_data {
struct radio_info_rec *radio;
const uint8_t *addr;
@ -1631,6 +1696,44 @@ static void setup_radio_interface(struct l_dbus_interface *interface)
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,
@ -1658,6 +1761,10 @@ static bool interface_property_get_address(struct l_dbus *dbus,
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",