440 lines
9.3 KiB
C
440 lines
9.3 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <ell/ell.h>
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enum {
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HWSIM_CMD_UNSPEC,
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HWSIM_CMD_REGISTER,
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HWSIM_CMD_FRAME,
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HWSIM_CMD_TX_INFO_FRAME,
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HWSIM_CMD_NEW_RADIO,
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HWSIM_CMD_DEL_RADIO,
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HWSIM_CMD_GET_RADIO,
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__HWSIM_CMD_MAX,
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};
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#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)
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enum {
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HWSIM_ATTR_UNSPEC,
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HWSIM_ATTR_ADDR_RECEIVER,
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HWSIM_ATTR_ADDR_TRANSMITTER,
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HWSIM_ATTR_FRAME,
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HWSIM_ATTR_FLAGS,
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HWSIM_ATTR_RX_RATE,
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HWSIM_ATTR_SIGNAL,
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HWSIM_ATTR_TX_INFO,
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HWSIM_ATTR_COOKIE,
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HWSIM_ATTR_CHANNELS,
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HWSIM_ATTR_RADIO_ID,
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HWSIM_ATTR_REG_HINT_ALPHA2,
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HWSIM_ATTR_REG_CUSTOM_REG,
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HWSIM_ATTR_REG_STRICT_REG,
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HWSIM_ATTR_SUPPORT_P2P_DEVICE,
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HWSIM_ATTR_USE_CHANCTX,
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HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
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HWSIM_ATTR_RADIO_NAME,
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HWSIM_ATTR_NO_VIF,
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HWSIM_ATTR_FREQ,
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__HWSIM_ATTR_MAX,
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};
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#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)
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static struct l_genl_family *hwsim;
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static bool keep_radios = false;
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static bool create_action = false;
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static bool list_action = false;
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static const char *list_option = NULL;
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static const char *destroy_action = NULL;
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static void do_debug(const char *str, void *user_data)
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{
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const char *prefix = user_data;
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l_info("%s%s", prefix, str);
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}
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static void create_callback(struct l_genl_msg *msg, void *user_data)
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{
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struct l_genl_attr attr;
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uint32_t radio_id = 0;
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/*
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* Note that the radio id is returned in the error field of
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* the returned message.
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*/
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if (!l_genl_attr_init(&attr, msg)) {
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int err = l_genl_msg_get_error(msg);
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if (err < 0) {
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l_warn("Failed to initialize create return attributes"
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" [%d/%s]", -err, strerror(-err));
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goto done;
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}
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radio_id = err;
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l_info("Created new radio with id %u", radio_id);
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} else {
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l_warn("Failed to get create return value");
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goto done;
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}
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done:
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l_main_quit();
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}
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static void destroy_callback(struct l_genl_msg *msg, void *user_data)
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{
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struct l_genl_attr attr;
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uint16_t type, len;
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const void *data;
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if (!l_genl_attr_init(&attr, msg)) {
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int err = l_genl_msg_get_error(msg);
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if (err < 0) {
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l_warn("Failed to destroy radio [%d/%s]",
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-err, strerror(-err));
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goto done;
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}
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l_info("Destroyed radio");
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}
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while (l_genl_attr_next(&attr, &type, &len, &data)) {
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}
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done:
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l_main_quit();
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}
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static void hwsim_config(struct l_genl_msg *msg, void *user_data)
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{
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struct l_genl_attr attr;
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uint16_t type, len;
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const void *data;
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uint8_t cmd;
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cmd = l_genl_msg_get_command(msg);
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l_debug("Config changed cmd %u", cmd);
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if (!l_genl_attr_init(&attr, msg))
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return;
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while (l_genl_attr_next(&attr, &type, &len, &data)) {
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l_debug("\tattr type %d len %d", type, len);
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}
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}
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static void list_callback_done(void *user_data)
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{
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l_main_quit();
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}
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static void list_callback(struct l_genl_msg *msg, void *user_data)
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{
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struct l_genl_attr attr;
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uint16_t type, len;
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const void *data;
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uint32_t idx = 0, channels = 0, custom_reg = 0;
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bool reg_strict = false, p2p = false, chanctx = false;
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char alpha2[2] = { };
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char *hwname = NULL;
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if (!l_genl_attr_init(&attr, msg)) {
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int err = l_genl_msg_get_error(msg);
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if (err < 0) {
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l_warn("Failed to list radio [%d/%s]",
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-err, strerror(-err));
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return;
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}
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}
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while (l_genl_attr_next(&attr, &type, &len, &data)) {
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switch (type) {
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case HWSIM_ATTR_RADIO_ID:
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if (len == 4)
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idx = *(int *)data;
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break;
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case HWSIM_ATTR_CHANNELS:
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if (len == 4)
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channels = *(uint32_t *)data;
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break;
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case HWSIM_ATTR_REG_HINT_ALPHA2:
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if (len == 2)
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memcpy(&alpha2, data, len);
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break;
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case HWSIM_ATTR_REG_CUSTOM_REG:
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if (len == 4)
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custom_reg = *(uint32_t *)data;
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break;
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case HWSIM_ATTR_REG_STRICT_REG:
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reg_strict = true;
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break;
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case HWSIM_ATTR_SUPPORT_P2P_DEVICE:
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p2p = true;
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break;
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case HWSIM_ATTR_USE_CHANCTX:
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chanctx = true;
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break;
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case HWSIM_ATTR_RADIO_NAME:
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hwname = l_malloc(len + 1);
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if (hwname) {
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strncpy(hwname, data, len);
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hwname[len] = '\0';
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}
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break;
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default:
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break;
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}
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}
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printf("%s radio id %d channels %d alpha2 %d %d custom reg %d "
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"reg strict %d p2p %d chanctx %d\n",
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hwname, idx, channels, alpha2[0], alpha2[1], custom_reg,
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reg_strict, p2p, chanctx);
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if (hwname)
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l_free(hwname);
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}
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static void hwsim_ready(void *user_data)
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{
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struct l_genl_msg *msg;
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int ret;
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ret = l_genl_family_register(hwsim, "config", hwsim_config,
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NULL, NULL);
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if (ret < 0) {
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fprintf(stderr, "Failed to create hwsim config listener\n");
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l_main_quit();
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return;
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}
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if (create_action) {
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msg = l_genl_msg_new_sized(HWSIM_CMD_NEW_RADIO,
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keep_radios ? 0 : 4);
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if (!keep_radios)
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l_genl_msg_append_attr(msg,
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HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
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0, NULL);
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l_genl_family_send(hwsim, msg, create_callback, NULL, NULL);
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l_genl_msg_unref(msg);
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return;
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} else if (destroy_action) {
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uint32_t id = atoi(destroy_action);
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msg = l_genl_msg_new_sized(HWSIM_CMD_DEL_RADIO, 8);
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l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_ID, 4, &id);
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l_genl_family_send(hwsim, msg, destroy_callback, NULL, NULL);
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l_genl_msg_unref(msg);
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} else if (list_action) {
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msg = l_genl_msg_new_sized(HWSIM_CMD_GET_RADIO,
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list_option ? 8: 4);
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if (list_option) {
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uint32_t id = atoi(list_option);
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l_genl_msg_append_attr(msg, HWSIM_ATTR_RADIO_ID,
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4, &id);
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l_genl_family_send(hwsim, msg, list_callback,
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NULL, NULL);
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} else {
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l_genl_family_dump(hwsim, msg, list_callback,
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NULL, list_callback_done);
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}
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l_genl_msg_unref(msg);
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} else
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l_main_quit();
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}
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static void hwsim_disappeared(void *user_data)
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{
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l_info("MAC80211_HWSIM missing");
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l_main_quit();
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}
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static void signal_handler(struct l_signal *signal, uint32_t signo,
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void *user_data)
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{
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switch (signo) {
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case SIGINT:
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case SIGTERM:
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l_main_quit();
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break;
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}
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}
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static void usage(void)
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{
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printf("hwsim - Wireless simulator\n"
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"Usage:\n");
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printf("\thwsim [options]\n");
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printf("Options:\n"
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"\t-L, --list [id] List simulated radios\n"
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"\t-C, --create Create new simulated radio\n"
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"\t-D, --destroy <id> Destroy existing radio\n"
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"\t-k, --keep Do not destroy radios when "
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"program exits\n"
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"\t-h, --help Show help options\n");
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}
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static const struct option main_options[] = {
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{ "list", optional_argument, NULL, 'L' },
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{ "create", no_argument, NULL, 'C' },
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{ "destroy", required_argument, NULL, 'D' },
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{ "keep", no_argument, NULL, 'k' },
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{ "version", no_argument, NULL, 'v' },
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{ "help", no_argument, NULL, 'h' },
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{ }
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};
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int main(int argc, char *argv[])
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{
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struct l_signal *signal;
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struct l_genl *genl;
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sigset_t mask;
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int exit_status, actions = 0;
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for (;;) {
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int opt;
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opt = getopt_long(argc, argv, ":L:CD:vhk", main_options, NULL);
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if (opt < 0)
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break;
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switch (opt) {
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case ':':
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if (optopt == 'L') {
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list_action = true;
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actions++;
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} else {
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printf("option '-%c' requires an argument\n",
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optopt);
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}
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break;
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case 'L':
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list_action = true;
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list_option = optarg;
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actions++;
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break;
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case 'C':
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create_action = true;
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actions++;
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break;
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case 'D':
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destroy_action = optarg;
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actions++;
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break;
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case 'k':
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keep_radios = true;
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break;
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case 'v':
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printf("%s\n", VERSION);
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return EXIT_SUCCESS;
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case 'h':
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usage();
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return EXIT_SUCCESS;
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default:
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printf("unrecognized argument '%s'\n",
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argv[optind - 1]);
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return EXIT_FAILURE;
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}
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}
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if (argc - optind > 0) {
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fprintf(stderr, "Invalid command line parameters\n");
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return EXIT_FAILURE;
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}
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if (actions > 1) {
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fprintf(stderr, "Only one action can be specified\n");
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return EXIT_FAILURE;
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}
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if (!actions) {
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fprintf(stderr, "No action has been specified\n");
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return EXIT_FAILURE;
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}
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sigemptyset(&mask);
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sigaddset(&mask, SIGINT);
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sigaddset(&mask, SIGTERM);
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signal = l_signal_create(&mask, signal_handler, NULL, NULL);
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l_log_set_stderr();
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printf("Wireless simulator ver %s\n", VERSION);
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genl = l_genl_new_default();
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if (!genl) {
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fprintf(stderr, "Failed to initialize generic netlink\n");
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exit_status = EXIT_FAILURE;
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goto done;
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}
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if (getenv("HWSIM_DEBUG"))
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l_genl_set_debug(genl, do_debug, "[GENL] ", NULL);
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hwsim = l_genl_family_new(genl, "MAC80211_HWSIM");
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if (!hwsim) {
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fprintf(stderr, "Failed to create generic netlink family\n");
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l_genl_unref(genl);
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exit_status = EXIT_FAILURE;
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goto done;
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}
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l_genl_family_set_watches(hwsim, hwsim_ready, hwsim_disappeared,
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NULL, NULL);
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l_main_run();
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l_genl_family_unref(hwsim);
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l_genl_unref(genl);
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exit_status = EXIT_SUCCESS;
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done:
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l_signal_remove(signal);
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return exit_status;
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}
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