#include
#include
#include
#include
#include
#include
#include
#include
int info_list(int all);
int get_interface_info(char *interface_name);
int set_interface(char *interface_name);
int get_ipaddr(char *interface_name);
int get_mac(char *interface_name);
int get_netmask(char *interface_name);
int get_broadcast(char *interface_name);
int set_ipaddr(char *interface_name, char *ip);
int set_mac(char *interface_name, char *mac);
int set_netmask(char *interface_name, char *netmask);
int set_broadcast(char *interface_name, char *broadcast);
int interface_up(char *interface_name);
int interface_down(char *interface_name);
int usage();
int main(int argc, char *argv[])
{
if (argc == 1)
{
info_list(0);
return 0;
}
if (argc == 2)
{
if (strcmp(argv[1], "all") == 0)
{
info_list(1);
return 0;
}
get_interface_info(argv[1]);
return 0;
}
if (argc == 3)
{
if (strcmp(argv[2], "set") == 0)
{
set_interface(argv[1]);
return 0;
}
if (strcmp(argv[2], "up") == 0)
{
interface_up(argv[1]);
return 0;
}
if (strcmp(argv[2], "down") == 0)
{
interface_down(argv[1]);
return 0;
}
usage();
return 0;
}
usage();
return 0;
}
int info_list(int all)
{
int len;
char *ifreq_pointer;
len = 10 * sizeof(struct ifreq);
ifreq_pointer = (char *) malloc(len);
struct ifconf get_info;
get_info.ifc_len = len;
get_info.ifc_ifcu.ifcu_buf = ifreq_pointer;
int sockfd;
sockfd = socket(PF_INET, SOCK_STREAM, 0);
ioctl(sockfd, SIOCGIFCONF, &get_info);
int count;
count = get_info.ifc_len / sizeof(struct ifreq);
struct sockaddr_in *return_sockaddr;
struct ifreq *result = (struct ifreq *) ifreq_pointer;
int i = 0;
if (all == 1)
{
for (i; i < count; i++)
{
printf("%s\n", result->ifr_name);
get_ipaddr(result->ifr_name);
get_mac(result->ifr_name);
get_netmask(result->ifr_name);
get_broadcast(result->ifr_name);
}
} else
{
struct ifreq tmp;
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
exit(-1);
}
for (i; i < count; i++)
{
strcpy(tmp.ifr_name, result->ifr_name);
if (ioctl(s, SIOCGIFFLAGS, &tmp) < 0)
{
perror("ioctl");
exit(-1);
}
if ((tmp.ifr_ifru.ifru_flags & IFF_UP) == 0)
continue;
printf("%s\n", tmp.ifr_name);
get_ipaddr(tmp.ifr_name);
get_mac(tmp.ifr_name);
get_netmask(tmp.ifr_name);
get_broadcast(tmp.ifr_name);
}
}
exit(0);
}
int get_ipaddr(char *interface_name)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
if (ioctl(s, SIOCGIFADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
struct sockaddr_in *ptr;
ptr = (struct sockaddr_in *) &ifr.ifr_ifru.ifru_addr;
printf(" IP:%s\n", inet_ntoa(ptr->sin_addr));
return 0;
}
int get_mac(char *interface_name)
{
if (strcmp(interface_name, "lo") == 0)
{
return 0;
}
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
if (ioctl(s, SIOCGIFHWADDR, &ifr) != 0)
{
perror("ioctl");
return -1;
}
u_char *ptr;
ptr = (u_char *) & ifr.ifr_ifru.ifru_hwaddr.sa_data[0];
printf(" MAC:%02x-%02x-%02x-%02x-%02x-%02x\n", *ptr, *(ptr + 1),
*(ptr + 2), *(ptr + 3), *(ptr + 4), *(ptr + 5));
return 0;
}
int get_netmask(char *interface_name)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
if (ioctl(s, SIOCGIFNETMASK, &ifr) < 0)
{
perror("ioctl");
return -1;
}
struct sockaddr_in *ptr;
ptr = (struct sockaddr_in *) &ifr.ifr_ifru.ifru_netmask;
printf(" Netmask:%s\n", inet_ntoa(ptr->sin_addr));
return 0;
}
int get_broadcast(char *interface_name)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
if (ioctl(s, SIOCGIFBRDADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
struct sockaddr_in *ptr;
ptr = (struct sockaddr_in *) &ifr.ifr_ifru.ifru_broadaddr;
printf(" Broadcast:%s\n", inet_ntoa(ptr->sin_addr));
return 0;
}
int get_interface_info(char *interface_name)
{
get_ipaddr(interface_name);
get_mac(interface_name);
get_netmask(interface_name);
get_broadcast(interface_name);
return 0;
}
int set_interface(char *interface_name)
{
char ip[18];
char mac_addr[20];
char netmask[18];
char broadcast[18];
printf("Change ");
get_ipaddr(interface_name);
printf("To: ");
fgets(ip, 17, stdin);
if (strcmp(ip, "\n") == 0)
goto set_mac;
set_ipaddr(interface_name, ip);
set_mac:
printf("Change ");
get_mac(interface_name);
printf("To: ");
fgets(mac_addr, 19, stdin);
if (strcmp(mac_addr, "\n") == 0)
goto set_netmask;
set_mac(interface_name, mac_addr);
set_netmask:
printf("Change ");
get_netmask(interface_name);
printf("To: ");
fgets(netmask, 17, stdin);
if (strcmp(netmask, "\n") == 0)
goto set_broadcast;
set_netmask(interface_name, netmask);
set_broadcast:
printf("Change ");
get_broadcast(interface_name);
printf("To: ");
fgets(broadcast, 17, stdin);
if (strcmp(broadcast, "\n") == 0)
return 0;
set_broadcast(interface_name, broadcast);
return 0;
}
int interface_up(char *interface_name)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
short flag;
flag = IFF_UP;
if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
{
perror("ioctl");
return -1;
}
ifr.ifr_ifru.ifru_flags |= flag;
if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int interface_down(char *interface_name)
{
if (strcmp(interface_name, "lo") == 0)
{
printf("You can't pull down interface lo\n");
return 0;
}
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
short flag;
flag = ~IFF_UP;
if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
{
perror("ioctl");
return -1;
}
ifr.ifr_ifru.ifru_flags &= flag;
if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int set_ipaddr(char *interface_name, char *ip)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
struct sockaddr_in addr;
bzero(&addr, sizeof(struct sockaddr_in));
addr.sin_family = PF_INET;
inet_aton(ip, &addr.sin_addr);
memcpy(&ifr.ifr_ifru.ifru_addr, &addr, sizeof(struct sockaddr_in));
if (ioctl(s, SIOCSIFADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int set_mac(char *interface_name, char *mac_addr)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
sa_family_t get_family;
get_family = ifr.ifr_ifru.ifru_hwaddr.sa_family;
interface_down(interface_name);
bzero(&ifr, sizeof(struct ifreq));
strcpy(ifr.ifr_name, interface_name);
ifr.ifr_ifru.ifru_hwaddr.sa_family = get_family;
short tmp;
int i, j;
j = 0;
for (i = 0; i < 17; i += 3)
{
if (mac_addr < 58 && mac_addr > 47)
tmp = mac_addr - 48;
if (mac_addr < 71 && mac_addr > 64)
tmp = mac_addr - 55;
if (mac_addr < 103 && mac_addr > 96)
tmp = mac_addr - 87;
tmp = tmp << 4;
if (mac_addr[i + 1] < 58 && mac_addr[i + 1] > 47)
tmp |= (mac_addr[i + 1] - 48);
if (mac_addr[i + 1] < 71 && mac_addr[i + 1] > 64)
tmp |= (mac_addr[i + 1] - 55);
if (mac_addr[i + 1] < 103 && mac_addr[i + 1] > 96)
tmp |= (mac_addr[i + 1] - 87);
memcpy(&ifr.ifr_ifru.ifru_hwaddr.sa_data[j++], &tmp, 1);
}
if (ioctl(s, SIOCSIFHWADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
interface_up(interface_name);
return 0;
}
int set_netmask(char *interface_name, char *netmask)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
struct sockaddr_in netmask_addr;
bzero(&netmask_addr, sizeof(struct sockaddr_in));
netmask_addr.sin_family = PF_INET;
inet_aton(netmask, &netmask_addr.sin_addr);
memcpy(&ifr.ifr_ifru.ifru_netmask, &netmask_addr,
sizeof(struct sockaddr_in));
if (ioctl(s, SIOCSIFNETMASK, &ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int set_broadcast(char *interface_name, char *broadcast)
{
int s;
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, interface_name);
struct sockaddr_in broadcast_addr;
bzero(&broadcast_addr, sizeof(struct sockaddr_in));
broadcast_addr.sin_family = PF_INET;
inet_aton(broadcast, &broadcast_addr.sin_addr);
memcpy(&ifr.ifr_ifru.ifru_broadaddr, &broadcast_addr,
sizeof(struct sockaddr_in));
if (ioctl(s, SIOCSIFBRDADDR, &ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int usage(void)
{
printf("Usage: myifconfig [all]|[interface [set|up|down]]\n");
return 0;
}
