c语言实现设置ip、网关、子网掩码

/****************************************************************************** * * ******************************************************************************* * File name: net.c * Purpose: * Author: Felix(HuangFei) * Version: v01.00 * Compiler: arm-linux-gcc * Created on: 2014-11-28 ******************************************************************************* * Note: * Revision history: * Created by HuangFei 2014-11-28 ******************************************************************************/ #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <linux/sockios.h> #include <netinet/in.h> #include <arpa/inet.h> #include <net/if_arp.h> #include <unistd.h> #include <net/if.h> #include <net/route.h> #include <string.h> #include <ifaddrs.h> #include "net.h" #define TRUE 1 #define FALSE 0 #define MAC_ADDRESS_LEN 6 #define PATH_PROCNET_ROUTE "/proc/net/route" #define IFACE_NAME_LENGTH IF_NAMESIZE /********************************************************************** * Function: SetMacAddress * Description: 设置mac地址 * Input: pInterface ：网络接口名字 如：eth0，pMacAddress：mac地址首地址 * Return: 成功 1，失败 0 * Others: **********************************************************************/ unsigned char SetMacAddress(char *pInterface,char *pMacAddress) { struct ifreq ifr; struct sockaddr *hwaddr; unsigned char *hwptr; int sockfd; int i; /* 判断接口输入是否正确 */ if((pInterface == NULL)||(pInterface[0]!='e')||(pInterface[1]!='t')||(pInterface[2]!='h')) { printf("input inteface error!\n"); return FALSE; } if(pMacAddress == NULL) { printf("input mac address error\n"); return FALSE; } sockfd= socket(AF_INET,SOCK_DGRAM,0); if (sockfd<0) { printf("Can't creat socket \r\n"); } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, pInterface, sizeof(ifr.ifr_name)-1); /*读出socket的信息*/ if (0 > ioctl(sockfd, SIOCGIFFLAGS, &ifr)) { printf("close the ethx:unknown interface\r\n"); } ifr.ifr_flags &= ~IFF_UP; /*将信息写到socket中，从而关闭eth0*/ if (0 > ioctl(sockfd, SIOCSIFFLAGS, &ifr)) { printf("Can't close the ethx \r\n"); return FALSE; } /*---------------------------------------------------------------------*/ /* set the interface eth0's MAC address */ /*---------------------------------------------------------------------*/ memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, pInterface, sizeof(ifr.ifr_name)-1); hwaddr=(struct sockaddr *)&ifr.ifr_hwaddr; /*ARPHRD_ETHER＝1，标识接收的ARP为以太网格式*/ hwaddr->sa_family = ARPHRD_ETHER; hwptr=hwaddr->sa_data; for(i=0;i<6;i++) *hwptr++ = (unsigned char)pMacAddress[i]; if (0 > ioctl(sockfd, SIOCSIFHWADDR, &ifr)) { printf("Can't set the MAC address\r\n"); } /*---------------------------------------------------------------------*/ /* open the interface eth0 */ /*---------------------------------------------------------------------*/ memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, pInterface, sizeof(ifr.ifr_name)-1); if (0 > ioctl(sockfd,SIOCGIFFLAGS, &ifr)) { printf("open the ethx:unknown interface\r\n"); } ifr.ifr_flags |= (IFF_UP | IFF_RUNNING); if (0 > ioctl(sockfd, SIOCSIFFLAGS, &ifr)) { printf("Can't open the ethx\r\n"); } close(sockfd); return TRUE; } /********************************************************************** * Function: SetIpAddress * Description: 设置ip地址 * Input: pInterface ：网络接口名字 如：eth0，IpAddress：ip地址的 * Return: 成功 1，失败 0 * Others: **********************************************************************/ unsigned char SetIpAddress(char *pInterface,unsigned int IpAddress) { struct ifreq ifr; struct sockaddr_in *sinaddr; int sockfd; if((pInterface == NULL)||(pInterface[0]!='e')||(pInterface[1]!='t')||(pInterface[2]!='h')) { printf("input inteface error!\n"); return FALSE; } if(IpAddress == 0) { printf("input ip address error\n"); return FALSE; } sockfd= socket(AF_INET,SOCK_DGRAM,0); if (sockfd<0) { printf("Can't creat socket \r\n"); } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, pInterface, sizeof(ifr.ifr_name)-1); sinaddr = (struct sockaddr_in *)&ifr.ifr_addr; sinaddr->sin_family = AF_INET; sinaddr->sin_addr.s_addr = IpAddress; if (0 > ioctl(sockfd, SIOCSIFADDR, &ifr)) { printf("Can't set ip address\r\n"); } close(sockfd); return TRUE; } /********************************************************************** * Function: SetMaskAddress * Description: 设置子网掩码 * Input: pInterface ：网络接口名字 如：eth0，IpMask：子网掩码 * Return: 成功 1，失败 0 * Others: **********************************************************************/ unsigned char SetMaskAddress(char *pInterface,unsigned int IpMask) { struct ifreq ifr; struct sockaddr_in *sinaddr; int sockfd; /* 判断接口输入是否正确 */ if((pInterface == NULL)||(pInterface[0]!='e')||(pInterface[1]!='t')||(pInterface[2]!='h')) { printf("input inteface error!\n"); return FALSE; } if(IpMask == 0) { printf("input mask address error\n"); return FALSE; } sockfd= socket(AF_INET,SOCK_DGRAM,0); if (sockfd<0) { printf("Can't creat socket \r\n"); } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, pInterface, sizeof(ifr.ifr_name)-1); sinaddr = (struct sockaddr_in *)&ifr.ifr_netmask; sinaddr->sin_family = AF_INET; sinaddr->sin_addr.s_addr = IpMask; if (0 > ioctl(sockfd, SIOCSIFNETMASK, &ifr)) { printf("Can't set subnet netmask\r\n"); } close(sockfd); return TRUE; } /********************************************************************** * Function: DelGateWay * Description: 删除指定的网关 * Input: pInterface ：网络接口名字 如：eth0，DelGateWay：网关 * Return: 成功 1，失败 0 * Others: **********************************************************************/ unsigned char DelGateWay(char *pInterface,unsigned int DelGateWay) { struct sockaddr_in *sinaddr; struct rtentry rt; struct sockaddr rtsockaddr; int sockfd; /* 判断接口输入是否正确 */ if((pInterface == NULL)||(pInterface[0]!='e')||(pInterface[1]!='t')||(pInterface[2]!='h')) { printf("input inteface error!\n"); return FALSE; } if(DelGateWay == 0) { printf("input GateWay error!\n"); return FALSE; } sockfd= socket(AF_INET,SOCK_DGRAM,0); if (sockfd<0) { printf("Can't creat socket \r\n"); } /* Clean out the RTREQ structure. */ memset((char *) &rt, 0, sizeof(struct rtentry)); memset((char *)&rtsockaddr,0,sizeof(struct sockaddr)); sinaddr = (struct sockaddr_in *)&rtsockaddr; sinaddr->sin_family = AF_INET; /*INADDR_ANY就是指定地址为0.0.0.0的地址,这个地址事实上表示不确定地址,或“所有地址”、“任意地址”*/ sinaddr->sin_addr.s_addr = INADDR_ANY; /*set the destination address to '0.0.0.0'*/ rt.rt_dst = rtsockaddr; /*set the netmask to '0.0.0.0'*/ rt.rt_genmask = rtsockaddr; /* Fill in the other fields. */ rt.rt_flags = (RTF_UP|RTF_GATEWAY); rt.rt_metric = 1; rt.rt_dev = pInterface; /*delete the current default gateway*/ sinaddr->sin_addr.s_addr = DelGateWay; rt.rt_gateway = rtsockaddr; if (0 > ioctl(sockfd, S