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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 updown.c
* \brief Implementation of Example updown 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"
/**
* \brief Default unix socket path (the leading \0 means using the abstract
* namespace instead of the filesystem).
*/
#define UNIX_PATH "\0updownsrv"
typedef struct {
int fd; /* Unix client socket */
} updown_data_t;
int updown_initialize(interface_t * interface, void * cfg)
{
struct sockaddr_un addr;
char * socket_path = UNIX_PATH;
updown_data_t * data = malloc(sizeof(updown_data_t));
if (!data)
goto ERR_MALLOC;
interface->data = data;
data->fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (data->fd == -1) {
perror("socket error");
goto ERR_SOCKET;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
if (*socket_path == '\0') {
*addr.sun_path = '\0';
strncpy(addr.sun_path+1, socket_path+1, sizeof(addr.sun_path)-2);
} else {
strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path)-1);
}
if (connect(data->fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
perror("connect error");
goto ERR_CONNECT;
}
if (interface_register_fd(interface, data->fd, NULL) < 0) {
ERROR("[updown_initialize] Error registering fd");
goto ERR_FD;
}
return 0;
ERR_FD:
ERR_CONNECT:
close(data->fd);
ERR_SOCKET:
free(data);
ERR_MALLOC:
return -1;
}
int updown_finalize(interface_t * interface)
{
updown_data_t * data = (updown_data_t*)interface->data;
if (data->fd > 0)
close(data->fd);
free(data);
return 0;
}
int updown_callback(interface_t * interface, int fd, void * unused)
{
updown_data_t * data = (updown_data_t*)interface->data;
char buf[100];
int rc;
rc = read(data->fd, buf, sizeof(buf));
if (rc < 0)
return -1;
/*
* If the process is paused (eg. in a debugger, we might have more than one
* read.
* XXX how big is the buffer
* XXX shall we drain the queue if it exceeds buffer size ?
*/
//assert(rc == 1);
/* Raise facelet update event */
facelet_t * facelet = facelet_create();
facelet_set_netdevice_type(facelet, NETDEVICE_TYPE_WIFI); //CELLULAR);
facelet_set_attr_clean(facelet);
switch(buf[0]) {
case '\0':
facelet_set_admin_state(facelet, FACE_STATE_DOWN);
break;
case '\1':
facelet_set_admin_state(facelet, FACE_STATE_UP);
break;
break;
default:
ERROR("Invalid data received from updown server. Ignoring...");
facelet_free(facelet);
return -1;
}
facelet_set_event(facelet, FACELET_EVENT_UPDATE);
interface_raise_event(interface, facelet);
return 0;
}
interface_ops_t updown_ops = {
.type = "updown",
.initialize = updown_initialize,
.finalize = updown_finalize,
.callback = updown_callback,
};
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