openwrt中设置mac地址

在对物联网产品开发测试的过程中需要对无线射频芯片配置mac地址,以高通 ATHEROS AR93XX为例, 硬件mac地址存放于uboot的一个固定地址中.在openwrt中可以开发setmac程序来配置./** * create by iversondeng168 */ #include sys/time.h #include arpa/inet.h #include stdlib.h #include unistd.h #include stdio.h #include netinet/in.h #include netinet/tcp.h #include errno.h #include syslog.h #include string.h #include ctype.h #include time.h #include fcntl.h #include memory.h #include signal.h #define UI8 unsigned char #define I8 char #define U32 unsigned int #define I32 int #define UBOOT_MACADDR (0x1fc00) I32 hex_char_to_int(I8 in) { if(in 0 in 9) return in - 0; if(in a in f) return (in - a) 10; if(in A in F) return (in - A) 10; return 0; } I8* cmd_system(const I8* command) { I8* result ; FILE *fpRead; fpRead popen(command, r); I8 buf[1024]; memset(buf,\0,sizeof(buf)); while(fgets(buf,1024-1,fpRead)!NULL) { result buf; } if(fpRead!NULL) pclose(fpRead); return result; } void set_wifissid(UI8*suffix) { I8*retpt; I8 cmds[128]{0}; //wifi ap模式才需要设置ssid retpt cmd_system(uci get wireless.wifi-iface[0].mode); if(strncmp(ap,retpt,2)) return; sprintf(cmds,uci set wireless.wifi-iface[0].ssidOpenWrt-%02X%02X%02X,suffix[0],suffix[1],suffix[2]); cmd_system(cmds); cmd_system(uci commit wireless);; } void set_macaddr(UI8*data,I32 datalen) { if(datalen ! 6) return; UI8 macaddr[6]; memset(macaddr,0,6); memcpy(macaddr,data,6); //macaddr 第一个字节的第二位必须是偶数(0、2、4、6、8、A、C、E) //经过测试mac不能全为0 if(macaddr[0] % 2 ! 0) return; if(macaddr[0] 0 macaddr[1] 0 macaddr[2] 0 macaddr[3] 0 macaddr[4] 0 macaddr[5] 0) return; //拷贝一份uboot cmd_system(dd if/dev/mtd0 of/tmp/new_uboot.bin); sleep(1); I8*newubootpath /tmp/new_uboot.bin; //检测副本存在并且可读可写 while(access(newubootpath,F_OK | R_OK | W_OK) -1); //将mac地址写入副本固件中 I32 new_fd open(newubootpath,O_RDWR); if(new_fd 0) return; //0x1fc00即为mac起始地址 lseek(new_fd,UBOOT_MACADDR,SEEK_SET); write(new_fd,macaddr,6); close(new_fd); //附带设置wifi名称 set_wifissid(macaddr[3]); sleep(1); //将副本写入分区会自动重启,openwrt重启后会自动清理掉/tmp下的文件 cmd_system(mtd -r write /tmp/new_uboot.bin u-boot); } //setmac auto / setmac AUTO //setmac 001234567890 I32 main(I32 argc,I8*argv[]) { UI8 i; UI8 j; UI8 macaddr[6]; memset(macaddr,0,sizeof(macaddr)); srand(time(NULL)); if(argc ! 2){ printf(argc ! 2\n); return -1; } if(!strcmp(auto,argv[1]) || !strcmp(AUTO,argv[1])) { sleep(1); macaddr[0] 0x00; for(i1;i sizeof(macaddr);i) { macaddr[i] rand() 0xFF; } } else{ if(strlen(argv[1]) ! 12) { printf(macadddr format error!\n); return -1; } for(i0,j0;i sizeof(macaddr);i,j2) { macaddr[i] hex_char_to_int(argv[1][j]) * 16 hex_char_to_int(argv[1][j 1]); if(macaddr[0] % 2 ! 0){ printf(the macaddr head must be even number\n); return -1; } } } printf(set macaddr%02X:%02X:%02X:%02X:%02X:%02X\n,macaddr[0],macaddr[1],macaddr[2],macaddr[3],macaddr[4],macaddr[5]); set_macaddr(macaddr,sizeof(macaddr)); return 0; }执行交叉编译GCC/home/openwrt-master/staging_dir/toolchain-mips_74kc_gcc-5.3.0_musl-1.1.16/bin/mips-openwrt-linux-gcc$GCC setmac.c -o setmac -O2 -w