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<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center"> ● UNIX网络编程 (BM: clown) </font></big></big></td></tr>
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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="320.htm">上一层</a>][<a href="450.htm">下一篇</a>]
<hr><p align="left"><small>:发信人: scz (小四), 信区: Security <br>
:标 题: ether.c <br>
:发信站: 武汉白云黄鹤站 (Sat Mar 3 17:23:49 2001), 站内信件 <br>
24. 如何在程序中获取本机MAC地址 <br>
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Q: 如何在C代码中获取本机MAC地址，我用strace跟踪ifconfig <br>
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ioctl(4, SIOCGIFHWADDR, 0xbffffb80) = 0 <br>
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ioctl(4, SIOCGIFADDR, 0xbffffb80) = 0 <br>
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ioctl(4, SIOCGIFBRDADDR, 0xbffffb80) = 0 <br>
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ioctl(4, SIOCGIFNETMASK, 0xbffffb80) = 0 <br>
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A: David Peter <dave.peter@eu.citrix.com> <br>
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strace是Linux下的工具，由于HP-UX 10.20的ioctl不支持SIOCGIFHWADDR，可能需要 <br>
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DLPI接口或者针对/dev/lan0的NETSTAT ioctl，为了使用NETSTAT ioctl还需要重启 <br>
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动，而且HP不赞成继续使用NETSTAT ioctl，HP-UX 11.00不再支持。 <br>
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根据手头一个古老的工具，Digital Unix下ioctl支持SIOCRPHYSADDR。至于SGI上的 <br>
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IRIX，我想可能需要一个原始套接字，比如： <br>
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s = socket( PF_RAW, SOCK_RAW, RAWPROTO_SNOOP ) <br>
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A: Floyd Davidson <floyd@ptialaska.net> <br>
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略(参看木棉Solaris版未修订版本) <br>
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A: scz <scz@nsfocus.com> <br>
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略(参看木棉Solaris版未修订版本) <br>
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A: Sun Microsystems(这是Sun公司的正宗解法，遗憾的是需要root权限) <br>
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如果不想通过ARP表获取MAC地址，就只能通过DLPI实现。此时必须以root身份运行该 <br>
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程序。 <br>
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-------------------------------------------------------------------------- <br>
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/* <br>
<br>
* Usage : <program name> <device name> <instance number> <br>
<br>
* <br>
<br>
* The program opens the Data Link provider, attaches to the PPA (Physical <br>
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* Point of Attachment) & uses the DL_PHYS_ADDR_REQ DLPI primitive to <br>
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* request the current physical address which is returned in the <br>
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* DL_PHYS_ADDR_ACK message. The MAC address is converted to ASCII format <br>
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* using the ether_ntoa(3N) function and printed. <br>
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* <br>
<br>
<br>
* The program needs to be compiled with the "-lsocket -lnsl" flags. <br>
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* # gcc -Wall -O3 -o ether ether.c -lsocket -lnsl <br>
<br>
* <br>
<br>
* The output of the program will be as shown below. <br>
<br>
* <br>
<br>
* # ./ether /dev/hme 0 <br>
<br>
* Mac Address 8:0:20:a8:2e:ac <br>
<br>
* <br>
<br>
* This program has been tested on SPARC machines running Solaris 2.5.1, <br>
<br>
* 2.6, 7 and 8 with the /dev/le and /dev/hme interfaces. <br>
<br>
*/ <br>
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<br>
<br>
<br>
#include <stdio.h> <br>
<br>
#include <stdlib.h> <br>
<br>
#include <fcntl.h> <br>
<br>
#include <stropts.h> <br>
<br>
#include <sys/types.h> <br>
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#include <sys/socket.h> <br>
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#include <net/if.h> <br>
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#include <netinet/in.h> <br>
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#include <netinet/if_ether.h> <br>
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#include <sys/errno.h> <br>
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#include <unistd.h> <br>
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#include <sys/dlpi.h> <br>
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#define MAXDLBUF 256 <br>
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int ppa, fd, flags, errno; <br>
<br>
long buffer[ MAXDLBUF ]; <br>
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struct strbuf ctl; <br>
<br>
dl_phys_addr_req_t phys_addr_req; <br>
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dl_attach_req_t attach_req; <br>
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dl_phys_addr_ack_t * dlpadd; <br>
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int main ( int argc, char * argv[] ) <br>
<br>
{ <br>
<br>
if ( argc != 3 ) <br>
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{ <br>
<br>
printf( "Usage : <program name> <device name> <instance number>\n" ); <br>
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exit( 1 ) ; <br>
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} <br>
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if ( geteuid() != 0 ) <br>
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{ <br>
<br>
printf( "Must be root.\n" ); <br>
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exit( 1 ); <br>
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} <br>
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if ( ( fd = open( argv[1], O_RDWR, 0 ) ) < 0 ) <br>
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{ <br>
<br>
printf( "Open of Device %s failed\n", argv[1] ); <br>
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exit( 1 ); <br>
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} <br>
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ppa = atoi( argv[2] ); <br>
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attach_req.dl_primitive = DL_ATTACH_REQ; <br>
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attach_req.dl_ppa = ppa; <br>
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ctl.maxlen = 0; <br>
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ctl.len = sizeof( attach_req ); <br>
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ctl.buf = ( char * )&attach_req; <br>
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flags = 0; <br>
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if ( putmsg( fd, &ctl, ( struct strbuf * )NULL, flags ) < 0 ) <br>
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{ <br>
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perror( "dlattachreq error\n" ); <br>
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return( errno ); <br>
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} <br>
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ctl.maxlen = MAXDLBUF; <br>
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ctl.len = 0; <br>
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ctl.buf = ( char * )&buffer; <br>
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if ( getmsg( fd, &ctl, ( struct strbuf * )0, &flags ) < 0 ) <br>
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{ <br>
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perror( "dlattachack error\n" ); <br>
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return( errno ); <br>
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} <br>
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if ( ctl.len > sizeof( dl_ok_ack_t ) ) <br>
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{ <br>
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printf( "dlattachokack too long\n" ); <br>
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exit( -1 ); <br>
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} <br>
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if ( flags != RS_HIPRI ) <br>
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{ <br>
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printf( "dlattachokack not RS_HIPRI\n" ); <br>
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exit( -1 ); <br>
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} <br>
if ( ctl.len < sizeof( dl_ok_ack_t ) ) <br>
{ <br>
printf( "dlattachokack too short\n" ); <br>
exit( -1 ); <br>
} <br>
} <br>
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phys_addr_req.dl_primitive = DL_PHYS_ADDR_REQ; <br>
phys_addr_req.dl_addr_type = DL_CURR_PHYS_ADDR; <br>
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ctl.maxlen = 0; <br>
ctl.len = sizeof( phys_addr_req ); <br>
ctl.buf = ( char * ) &phys_addr_req; <br>
flags = 0; <br>
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if ( putmsg( fd, &ctl, ( struct strbuf * )NULL, flags ) < 0 ) <br>
{ <br>
perror( "dlphysaddreq error\n" ); <br>
return( errno ); <br>
} <br>
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ctl.maxlen = MAXDLBUF; <br>
ctl.len = 0; <br>
ctl.buf = ( char * ) buffer; <br>
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if ( getmsg( fd, &ctl, ( struct strbuf * )0, &flags ) < 0 ) <br>
{ <br>
perror( "dlinfoack error\n" ); <br>
return( errno ); <br>
} <br>
if ( flags != RS_HIPRI ) <br>
{ <br>
printf( "dlgetpyhsaddr not RS_HIPRI\n" ); <br>
exit( -1 ); <br>
} <br>
if ( ctl.len < sizeof( dl_phys_addr_ack_t ) ) <br>
{ <br>
printf( "dlgetphysaddr too short\n" ); <br>
exit( -1 ); <br>
} <br>
dlpadd = ( dl_phys_addr_ack_t * )ctl.buf; <br>
printf( "Mac Address %s\n", <br>
( char * )ether_ntoa( ctl.buf + dlpadd->dl_addr_offset ) ); <br>
return( 0 ); <br>
} /* end of main */ <br>
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