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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* \file priority_controller.c
* \brief Implementation of Priority Controller interface
*/
#include <assert.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <hicn/facemgr.h>
#include "../../common.h"
#include "../../interface.h"
#define PC_DEFAULT_PORT 9533
typedef struct {
int fd;
} pc_data_t;
int priority_controller_initialize(interface_t * interface, void * cfg)
{
INFO("Initializing priority controller");
struct sockaddr_in addr;
pc_data_t * data = malloc(sizeof(pc_data_t));
if (!data) {
INFO("Priority controller data memory allocation error");
goto ERR_MALLOC;
}
interface->data = data;
data->fd = socket(AF_INET, SOCK_DGRAM, 0);
//data->fd = socket(AF_INET, SOCK_STREAM, 0);
if (data->fd < 0) {
INFO("Priority controller socket error");
perror("socket error");
goto ERR_SOCKET;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(PC_DEFAULT_PORT);
if (bind(data->fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
INFO("Priority controller socket bind error");
perror("bind error");
goto ERR_BIND;
}
if (interface_register_fd(interface, data->fd, NULL) < 0) {
ERROR("[priority_controller_initialize] Error registering fd");
goto ERR_FD;
}
INFO("Priority controller successfully initialized");
return 0;
ERR_FD:
ERR_BIND:
close(data->fd);
ERR_SOCKET:
free(data);
ERR_MALLOC:
return -1;
}
int priority_controller_finalize(interface_t * interface)
{
pc_data_t * data = (pc_data_t*)interface->data;
if (data->fd > 0) {close(data->fd);}
free(data);
return 0;
}
int priority_controller_callback(interface_t * interface, int fd, void * unused)
{
pc_data_t * data = (pc_data_t*)interface->data;
char buf[100];
int rc;
INFO("Priority controller receiving command");
rc = recv(data->fd, buf, 100, 0);
if (rc < 0) {
INFO("Priority controller read error");
return -1;
}
INFO("Priority controller received command: %02X", buf[0]);
facelet_t * facelet_w = facelet_create();
facelet_t * facelet_c = facelet_create();
facelet_set_netdevice_type(facelet_w, NETDEVICE_TYPE_WIFI);
facelet_set_netdevice_type(facelet_c, NETDEVICE_TYPE_CELLULAR);
facelet_set_attr_clean(facelet_w);
facelet_set_attr_clean(facelet_c);
switch(buf[0]) {
case '\0':
facelet_set_priority(facelet_w, 0);
facelet_set_priority(facelet_c, 10);
INFO("Priority controller configuring Cellular preferred");
break;
case '\1':
facelet_set_priority(facelet_w, 10);
facelet_set_priority(facelet_c, 0);
INFO("Priority controller configuring Wi-Fi preferred");
break;
case '\2':
facelet_set_priority(facelet_w, 0);
facelet_set_priority(facelet_c, 0);
INFO("Priority controller configuring both Cellular and Wi-Fi preferred");
break;
default:
INFO("Priority controller invalid data received from updown server. Ignoring...");
facelet_free(facelet_w);
facelet_free(facelet_c);
return 0;
}
facelet_set_event(facelet_w, FACELET_EVENT_UPDATE);
facelet_set_event(facelet_c, FACELET_EVENT_UPDATE);
interface_raise_event(interface, facelet_w);
interface_raise_event(interface, facelet_c);
return 0;
}
interface_ops_t priority_controller_ops = {
.type = "priority_controller",
.initialize = priority_controller_initialize,
.finalize = priority_controller_finalize,
.callback = priority_controller_callback,
};
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