1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
* 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,
#ifdef WITH_POLICY
.priority = 0,
.tags = POLICY_TAGS_EMPTY,
#endif /* WITH_POLICY */
},
};
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;
}
|
