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/*
* Copyright (c) 2021 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 examples/create_face.c
* \brief libhicnctrl sample code : IPV4/UDP face creation
*
* NOTES:
* - This sample code is IPv4 only
*/
#include <stdlib.h>
#include <sys/types.h> // getifaddrs
#include <ifaddrs.h> // getifaddrs
#include <stdio.h>
#include <sys/socket.h> // socket
#include <sys/ioctl.h> // ioctl
#include <unistd.h>
#include <hicn/ctrl.h>
#include <hicn/util/log.h>
int get_local_info(char *if_name, ip_address_t *local_ip) {
struct ifaddrs *addrs;
struct ifreq ifr = {
.ifr_addr.sa_family = AF_INET,
};
int ret = -1;
int fd = socket(AF_INET, SOCK_DGRAM, 0);
getifaddrs(&addrs);
for (struct ifaddrs *tmp = addrs; tmp; tmp = tmp->ifa_next) {
if (!tmp->ifa_addr || tmp->ifa_addr->sa_family != AF_PACKET) continue;
if (strcmp(tmp->ifa_name, "lo") == 0) continue;
snprintf(if_name, IFNAMSIZ, "%s", tmp->ifa_name);
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", tmp->ifa_name);
if (ioctl(fd, SIOCGIFADDR, &ifr) == -1) {
// perror("ioctl");
continue;
}
*local_ip = IP_ADDRESS_EMPTY;
local_ip->v4.as_inaddr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
if (ip_address_empty(local_ip)) continue;
ret = 0;
break;
}
freeifaddrs(addrs);
close(fd);
return ret;
}
int main() {
char remote_ip_str[INET_ADDRSTRLEN] = "1.1.1.1";
ip_address_t local_ip;
ip_address_t remote_ip;
char if_name[IFNAMSIZ];
/* Retrieving local info */
if (get_local_info(if_name, &local_ip) < 0) {
DEBUG("Error getting local information");
goto ERR_INIT;
}
char local_ip_str[MAXSZ_IP_ADDRESS];
ip_address_snprintf(local_ip_str, MAXSZ_IP_ADDRESS, &local_ip, AF_INET);
DEBUG("Local information :");
DEBUG(" - Interface name : %s", if_name);
DEBUG(" - IP address : %s", local_ip_str);
if (ip_address_pton(remote_ip_str, &remote_ip) < 0) {
DEBUG("Error parsing remote IP address");
goto ERR_INIT;
}
/* Filling face information */
hc_face_t face = {
.face =
{
.type = FACE_TYPE_UDP,
.family = AF_INET,
.local_addr = local_ip,
.remote_addr = remote_ip,
.local_port = 6000,
.remote_port = 6000,
.admin_state = FACE_STATE_UNDEFINED,
.state = FACE_STATE_UNDEFINED,
.priority = 0,
.tags = POLICY_TAGS_EMPTY,
},
};
if (netdevice_set_name(&face.face.netdevice, if_name) < 0) {
DEBUG("Error setting face netdevice name");
goto ERR_INIT;
}
/* Connecting to socket and creating face */
hc_sock_t *socket = hc_sock_create();
if (!socket) {
DEBUG("Error creating libhicnctrl socket");
goto ERR_SOCK;
}
if (hc_sock_connect(socket) < 0) {
DEBUG("Error connecting to forwarder");
goto ERR;
}
if (hc_face_create(socket, &face) < 0) {
DEBUG("Error creating face");
goto ERR;
}
DEBUG("Face created successfully");
ERR:
hc_sock_free(socket);
ERR_SOCK:
ERR_INIT:
return 0;
}
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