#include <stdio.h> #include <string.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <net/if.h> #include <stdio.h> #include <netinet/in.h> #include <arpa/inet.h> #include <net/route.h> #define AEIDEBUGERROR printf #define AEIDEBUGIMPORTANTINFO printf /*! * * * Return: * * \author Ocean (12/01/2016) */ int wifi_getLocalMac(const char *ifname, unsigned char mac[6]) { struct ifreq ifr; int skfd; if((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { AEIDEBUGERROR("create socket fail\n"); return -1; } memset(&ifr,0,sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)-1); if(ioctl( skfd, SIOCGIFHWADDR, &ifr) < 0) { AEIDEBUGERROR("get %s ioctl mac error\n", ifname); close(skfd); return -1; } close(skfd); mac[0] = (unsigned char)ifr.ifr_hwaddr.sa_data[0]; mac[1] = (unsigned char)ifr.ifr_hwaddr.sa_data[1]; mac[2] = (unsigned char)ifr.ifr_hwaddr.sa_data[2]; mac[3] = (unsigned char)ifr.ifr_hwaddr.sa_data[3]; mac[4] = (unsigned char)ifr.ifr_hwaddr.sa_data[4]; mac[5] = (unsigned char)ifr.ifr_hwaddr.sa_data[5]; AEIDEBUGIMPORTANTINFO("Get Local MAC: [X:X:X:X:X:X]\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); return 0; } /*! * * * Return: * * \author Ocean (12/01/2016) */ int wifi_getLocalIpaddr(const char *ifname, in_addr_t *ipaddr) { /* struct ifreq { #define IFHWADDRLEN 6 union { char ifrn_name[IFNAMSIZ]; // if name, e.g. "en0" } ifr_ifrn; union { struct sockaddr ifru_addr; struct sockaddr ifru_dstaddr; struct sockaddr ifru_broadaddr; struct sockaddr ifru_netmask; struct sockaddr ifru_hwaddr; short ifru_flags; int ifru_ivalue; int ifru_mtu; struct ifmap ifru_map; char ifru_slave[IFNAMSIZ]; // Just fits the size char ifru_newname[IFNAMSIZ]; void __user * ifru_data; struct if_settings ifru_settings; } ifr_ifru; } typedef unsigned short sa_family_t struct sockaddr { // include/linux/socket.h sa_family_t sa_family; // address family, AF_xxx char sa_data[14]; // 14 bytes of protocol address } #define __SOCK_SIZE__ 16 // sizeof(struct sockaddr) struct sockaddr_in { // in.h Structure describing an Internet (IP) socket address. sa_family_t sin_family; // Address family unsigned short int sin_port; // Port number struct in_addr sin_addr; // Internet address // Pad to size of `struct sockaddr'. unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - sizeof(unsigned short int) - sizeof(struct in_addr)]; } struct in_addr { union { struct { u_char s_b1,s_b2,s_b3,s_b4;} S_un_b; struct { u_short s_w1,s_w2;} S_un_w; u_long S_addr; #define s_addr S_un.S_addr } S_un; } inet_addr("192.168.0.1") = 0xC0A80001 my_addr.sin_addr.s_addr = inet_addr("192.168.0.1"); */ struct ifreq ifr; int skfd; if((skfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) { AEIDEBUGERROR("socket create fail\n"); return -1; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); if(ioctl(skfd, SIOCGIFADDR, &ifr) < 0) { AEIDEBUGERROR("%s ioctl SIOCGIFADDR error\n", ifname); close(skfd); return -1; } close(skfd); *ipaddr = ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr.s_addr; AEIDEBUGIMPORTANTINFO("Get local IP: X-%s\n", *ipaddr, inet_ntoa(((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr)); return 0; } /*! * * * Return: * * \author Ocean (12/01/2016) */ int wifi_setLocalIpaddr(const char *ifname, in_addr_t ipaddr) { struct ifreq ifr; int skfd; if((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { AEIDEBUGERROR("socket create fail\n"); return -1; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)-1); ((struct sockaddr_in*)&ifr.ifr_addr)->sin_family = AF_INET; ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr.s_addr = ipaddr; if(ioctl( skfd, SIOCSIFADDR, &ifr) < 0) { AEIDEBUGERROR( "Set %s ip error\n", ifname); close(skfd); return -1; } /* ifr_req.ifr_flags |= IFF_UP |IFF_RUNNING; if(ioctl(skfd, SIOCSIFFLAGS, &ifr_req) < 0) { AEIDEBUGERROR("SIOCSIFFLAGS"); close(skfd); return -1; } */ close(skfd); AEIDEBUGIMPORTANTINFO("Set local IP: X-%s\n", ipaddr, inet_ntoa(((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr)); return 0; } /*! * * * Return: * * \author Ocean (12/01/2016) */ unsigned long wifi_getLocalNetmask(const char *ifname, in_addr_t *netmask) { struct ifreq ifr; int skfd; if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) <= 0) { AEIDEBUGERROR("create socket fail\n"); return -1; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name )-1); if ((ioctl(skfd, SIOCGIFNETMASK, &ifr)) < 0) { AEIDEBUGERROR("mac ioctl error\n"); close(skfd); return -1; } close(skfd); *netmask = ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr.s_addr; AEIDEBUGIMPORTANTINFO("Get local netmask: X-%s\n", *netmask, inet_ntoa(((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr)); return 0; } /*! * * * Return: * * \author Ocean (12/01/2016) */ int wifi_setLocalNetmask(const char *ifname, in_addr_t netmask) { struct ifreq ifr; int skfd; if((skfd = socket( AF_INET, SOCK_DGRAM, 0)) == -1) { AEIDEBUGERROR("socket create fail\n"); return -1; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)-1); ((struct sockaddr_in*)&ifr.ifr_addr)->sin_family = AF_INET; ((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr.s_addr = netmask; if(ioctl(skfd, SIOCSIFNETMASK, &ifr) < 0) { AEIDEBUGERROR("sock_netmask ioctl error\n"); close(skfd); return -1; } close(skfd); AEIDEBUGIMPORTANTINFO("Set local netmask: X-%s\n", netmask, inet_ntoa(((struct sockaddr_in*)&ifr.ifr_addr)->sin_addr)); return 0; } /*! * /proc/net/route * * Return: * * \author Ocean (12/01/2016) */ int setLocalGateway(const char *ifname, in_addr_t gateway, int sw) { /* struct rtentry { unsigned long rt_pad1; struct sockaddr rt_dst; // target address struct sockaddr rt_gateway; // gateway addr (RTF_GATEWAY) struct sockaddr rt_genmask; // target network mask (IP) unsigned short rt_flags; short rt_pad2; unsigned long rt_pad3; void *rt_pad4; short rt_metric; // +1 for binary compatibility! char *rt_dev; // forcing the device at add unsigned long rt_mtu; // per route MTU/Window #define rt_mss rt_mtu // Compatibility :-( unsigned long rt_window; // Window clamping unsigned short rt_irtt; // Initial RTT } */ struct rtentry route; int skfd; if((skfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) { AEIDEBUGERROR("socket create fail\n"); return -1; } memset(&route, 0, sizeof( route )); route.rt_dev = (char*)ifname; ((struct sockaddr_in*)&route.rt_gateway)->sin_family = AF_INET; ((struct sockaddr_in*)&route.rt_gateway)->sin_addr.s_addr = gateway; ((struct sockaddr_in*)&route.rt_dst)->sin_family = AF_INET; ((struct sockaddr_in*)&route.rt_dst)->sin_addr.s_addr = INADDR_ANY; ((struct sockaddr_in*)&route.rt_genmask)->sin_family = AF_INET; ((struct sockaddr_in*)&route.rt_genmask)->sin_addr.s_addr = INADDR_ANY; route.rt_flags = RTF_UP | RTF_GATEWAY; route.rt_metric = 0; if(ioctl(skfd, sw?SIOCADDRT:SIOCDELRT, &route) < 0) { AEIDEBUGERROR("ioctl SIOCDELRT error\n"); close(skfd); return -1; } close(skfd); AEIDEBUGIMPORTANTINFO("%s default gateway: X-%s\n", sw?"Add":"Del", gateway, inet_ntoa(((struct sockaddr_in*)&route.rt_gateway)->sin_addr)); return 0; } /*! * * * Return: * * \author Ocean (12/01/2016) */ int wifi_addLocalGateway(const char *ifname, in_addr_t gateway) { return setLocalGateway(ifname, gateway, 1); } int wifi_delLocalGateway(const char *ifname, in_addr_t gateway) { return setLocalGateway(ifname, gateway, 0); } int main(int argc, char **argv) { in_addr_t ipaddr; in_addr_t netmask; char mac[6]; //wifi_setLocalIpaddr("eth0", inet_addr("192.168.5.172")); wifi_setLocalIpaddr(argv[1], inet_addr(argv[2])); wifi_addLocalGateway(argv[1], inet_addr(argv[3])); return 0; wifi_getLocalIpaddr;g("eth0", &ipaddr); wifi_setLocalIpaddr("eth0", inet_addr("192.168.5.172")); wifi_getLocalIpaddr;g("eth0", &ipaddr); wifi_setLocalIpaddr("eth0", inet_addr("192.168.5.173")); wifi_getLocalIpaddr;g("eth0", &ipaddr); printf("\n"); wifi_getLocalNetmask("eth0", &netmask); //wifi_setLocalNetmask("eth0", inet_addr("255.255.0.0")); wifi_getLocalNetmask("eth0", &netmask); //wifi_setLocalNetmask("eth0", inet_addr("255.255.255.0")); wifi_getLocalNetmask("eth0", &netmask); wifi_getLocalMac("eth0", mac); return 0; }
