Created
July 2, 2012 09:45
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a small code using sockaddr_in and ifreq to get ip and mac
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| #include<stdio.h> | |
| #include<stdlib.h> | |
| #include<string.h> | |
| #include<net/if.h> | |
| #include<arpa/inet.h> | |
| #include<linux/sockios.h> | |
| int main(int argc,char **argv) | |
| { | |
| struct sockaddr_in *addr; | |
| struct ifreq ifr; | |
| char *address; | |
| int sockfd; | |
| //printf("%s\n",argv[1]); | |
| char *name = argv[1]; | |
| printf("%s\n",name); | |
| if(strlen(name)>=IFNAMSIZ) | |
| printf("device name is error.\n"),exit(0); | |
| strcpy(ifr.ifr_name,name); | |
| sockfd=socket(AF_INET,SOCK_DGRAM,0); | |
| //get inet addr | |
| if(ioctl(sockfd,SIOCGIFADDR,&ifr)<0) | |
| printf("ioctl error!!!\n"),exit(0); | |
| addr = (struct sockaddr_in *)&(ifr.ifr_addr); | |
| address=inet_ntoa(addr->sin_addr); | |
| printf("inet addr:%s\n",address); | |
| //printf("%d\n",ifr.ifr_addr); | |
| //get speed | |
| /* if(ioctl(sockfd,SIOCGIFMETRIC,&ifr)<0) | |
| printf("dont know speed"); | |
| printf("%d\n",ifr.ifr_metric); | |
| */ | |
| //get Mask | |
| if(ioctl(sockfd,SIOCGIFADDR,&ifr)<0) | |
| printf("ioctl error.\n"),exit(0); | |
| addr=(struct sockaddr_in *)&ifr.ifr_addr; | |
| address=inet_ntoa(addr->sin_addr); | |
| printf("Mask:%s\n",address); | |
| //get HWaddr | |
| u_int8_t hd[6]; | |
| if(ioctl(sockfd,SIOCGIFHWADDR,&ifr)<0) | |
| printf("hwaddr error.\n"),exit(0); | |
| memcpy(hd,ifr.ifr_hwaddr.sa_data,sizeof(hd)); | |
| int i=0; | |
| printf("HWaddr:"); | |
| for(i;i<6;i++) | |
| { | |
| printf("%02X:",hd[i]); | |
| } | |
| printf("\n"); | |
| //get the type of Network card | |
| int index = get_eth_index(argv[1]); | |
| //printf("eth_type:%d\n",index); | |
| if(index==0) | |
| printf("IF_PORT_UNKNOWN\n"); | |
| else if(index==1) | |
| printf("eth_type:IF_PORT_10BASET2\n",index); | |
| else if(index==2) | |
| printf("eth_type:IF_PORT_10BASET\n",index); | |
| else if(index==3) | |
| printf("eth_type:IF_PORT_AUI\n",index); | |
| else if(index==4) | |
| printf("eth_type:IF_PORT_100BASET\n",index); | |
| else if(index==5) | |
| printf("eth_type:IF_PORT_100BASETX\n",index); | |
| else if(index==5) | |
| printf("eth_type:IF_PORT_100BASEFX\n",index); | |
| else | |
| printf("eth_type:%d\t please complete the eth_type!!!\n"); | |
| exit(0); | |
| } | |
| int get_eth_index(char *ethname) | |
| { | |
| int sock = socket(AF_INET ,SOCK_STREAM , 0); | |
| if(sock <0 ) | |
| { | |
| printf("get_mac_index sock error \n"); | |
| exit(0); | |
| } | |
| struct ifreq ifstruct; | |
| strcpy(ifstruct.ifr_name ,ethname ); | |
| if( ioctl(sock ,SIOCGIFINDEX , &ifstruct) == -1 ) | |
| { | |
| printf("get_mac_ioctl error \n"); | |
| exit(0); | |
| } | |
| close(sock); | |
| return ifstruct.ifr_ifindex; | |
| } |
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