net info

Author: git-user-cpp

main

@@ -4,6 +4,7 @@
 #include "cpu/cpu_info.h"
 #include "rom/rom_info.h"
 #include "hlp/hlp_info.h"
+#include "net/net_info.h"
 
 int main(int argc, char **argv) {
     if(argc == 1) {
@@ -27,6 +28,13 @@ int main(int argc, char **argv) {
             print_ram_info();
         } else if(strcmp(argv[1], "-rom") == 0) {
             print_rom_info();
+        } else if(strcmp(argv[1], "-net") == 0) {
+            char host_name[100];
+            printf("Enter a hostname: ");
+            fgets(host_name, sizeof(host_name), stdin);
+            host_name[strcspn(host_name, "\n")] = '\0';
+
+            print_net_info(host_name); 
         } else if(strcmp(argv[1], "-v") == 0 || strcmp(argv[1], "--version") == 0) {
             print_ver_info();
         } else if(strcmp(argv[1], "-b") == 0 || strcmp(argv[1], "--banner") == 0) {

src/main.c

@@ -0,0 +1,36 @@
+#include <ifaddrs.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+void print_net_info(char *hostname){
+    struct hostent *host = gethostbyname(hostname);
+    if(host == NULL){
+        perror("gethostbyname");
+        exit(1);
+    } else {
+        printf("Host Name: %s\n", host->h_name);
+        printf("IP Address: ");
+        for(int i = 0; host->h_addr_list[i] != NULL; i++){
+            printf("%s ", inet_ntoa(*(struct in_addr *)host->h_addr_list[i]));
+        }
+        printf("\n");
+    }
+
+    struct ifaddrs *ifaddr, *ifa;
+    if(getifaddrs(&ifaddr) == -1) {
+        perror("getifaddrs error");
+        exit(1);
+    }
+    for(ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next){
+        if(ifa->ifa_addr != NULL && ifa->ifa_addr->sa_family == AF_INET){
+            printf("Interface: %s\n", ifa->ifa_name);
+            printf("Address: %s\n", inet_ntoa(((struct sockaddr_in*)ifa->ifa_addr)->sin_addr));
+            printf("Netmask: %s\n", inet_ntoa(((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr));
+        }
+    }
+
+    freeifaddrs(ifaddr);
+}