Difference between revisions of "Ip address get"
From Teknologisk videncenter
(Created page with "=c= <source lang=cli> #include <stdio.h> #include <unistd.h> #include <string.h> →for strncpy: #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #incl...") |
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Revision as of 10:45, 23 March 2024
c
#include <stdio.h>
#include <unistd.h>
#include <string.h> /* for strncpy */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <getopt.h>
int main(int argc, char *argv[]) {
int fd;
struct ifreq ifr;
if (argc != 2) {
fprintf(stderr,"Usage: %s interface\n",argv[0]);
return(1);
}
fd = socket(AF_INET, SOCK_DGRAM, 0);
/* I want to get an IPv4 IP address */
ifr.ifr_addr.sa_family = AF_INET;
/* I want IP address attached to interfacename in argv[1] */
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ-1);
ioctl(fd, SIOCGIFADDR, &ifr);
close(fd);
/* display result */
printf("%s\n", inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
return 0;
}
Python
import netifaces
interface='eth0'
ipv4=2 # netifaces index for ipv4
def get_ipv4(iface):
interface_list = netifaces.interfaces()
for i in interface_list:
if iface == i:
addresses=netifaces.ifaddresses(iface)
if ipv4 in addresses:
return(addresses[ipv4][0]['addr'])
else:
return("No IPv4 address")