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hwsim: Receive multicast netlink event for NEW/DEL radio commands

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Kernel sends HWSIM_CMD_NEW_RADIO and HWSIM_CMD_DEL_RADIO multicast
events when new radio have been created and when existing one has
been deleted. The events are sent to "config" netlink multicast group.

The hwsim catches these events and uses the information to monitor
what simulated radios are created and deleted in the system.
This commit is contained in:
Jukka Rissanen 2014-10-31 15:42:40 +02:00 committed by Denis Kenzior
parent 8e3a17cf56
commit fb4075da5e
1 changed files with 32 additions and 4 deletions
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36
tools/hwsim.c
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@ -34,8 +34,8 @@ enum {
HWSIM_CMD_REGISTER,
HWSIM_CMD_FRAME,
HWSIM_CMD_TX_INFO_FRAME,
HWSIM_CMD_CREATE_RADIO,
HWSIM_CMD_DESTROY_RADIO,
HWSIM_CMD_NEW_RADIO,
HWSIM_CMD_DEL_RADIO,
__HWSIM_CMD_MAX,
};
#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)
@ -128,12 +128,40 @@ done:
l_main_quit();
}
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);
}
}
static void hwsim_ready(void *user_data)
{
struct l_genl_msg *msg;
int ret;
ret = l_genl_family_register(hwsim, "config", hwsim_config,
NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Failed to create hwsim config listener\n");
l_main_quit();
return;
}
if (create_action) {
msg = l_genl_msg_new_sized(HWSIM_CMD_CREATE_RADIO,
msg = l_genl_msg_new_sized(HWSIM_CMD_NEW_RADIO,
keep_radios ? 0 : 4);
if (!keep_radios)
@ -147,7 +175,7 @@ static void hwsim_ready(void *user_data)
} else if (destroy_action) {
uint32_t id = atoi(destroy_action);
msg = l_genl_msg_new_sized(HWSIM_CMD_DESTROY_RADIO, 8);
msg = l_genl_msg_new_sized(HWSIM_CMD_DEL_RADIO, 8);
l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_ID, 4, &id);
l_genl_family_send(hwsim, msg, destroy_callback, NULL, NULL);
l_genl_msg_unref(msg);