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- /*
- * linklocal - print ipv6 linklocal address of a mac address
- */
- #include <u.h>
- #include <libc.h>
- #include <ip.h>
- void
- ea2lla(uchar *lla, uchar *ea)
- {
- assert(IPaddrlen == 16);
- memset(lla, 0, IPaddrlen);
- lla[0] = 0xFE;
- lla[1] = 0x80;
- lla[8] = ea[0] | 0x2;
- lla[9] = ea[1];
- lla[10] = ea[2];
- lla[11] = 0xFF;
- lla[12] = 0xFE;
- lla[13] = ea[3];
- lla[14] = ea[4];
- lla[15] = ea[5];
- }
- static void
- process(char *ether)
- {
- uchar ethaddr[6], ipaddr[16];
- if (parseether(ethaddr, ether) < 0)
- sysfatal("%s: not an ether address\n", ether);
- ea2lla(ipaddr, ethaddr);
- print("%I\n", ipaddr);
- }
- void
- main(int argc, char *argv[])
- {
- int i, errflg = 0;
- ARGBEGIN {
- default:
- errflg++;
- break;
- } ARGEND
- fmtinstall('I', eipfmt);
- if (argc <= 0 || errflg)
- sysfatal("usage: %s ether...", argv0);
- for (i = 0; i < argc; i++)
- process(argv[i]);
- exits(0);
- }
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