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/*- |
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* Copyright (c) 1990 The Regents of the University of California. |
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* All rights reserved. |
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* |
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* %sccs.include.redist.c% |
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*/ |
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|
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#if defined(LIBC_SCCS) && !defined(lint) |
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static char sccsid[] = "@(#)linkaddr.c 5.1 (Berkeley) 06/01/90"; |
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#endif /* LIBC_SCCS and not lint */ |
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|
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <net/if_dl.h> |
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|
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/* States*/ |
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#define NAMING 0 |
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#define GOTONE 1 |
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#define GOTTWO 2 |
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#define RESET 3 |
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/* Inputs */ |
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#define DIGIT (4*0) |
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#define END (4*1) |
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#define DELIM (4*2) |
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#define LETTER (4*3) |
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|
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link_addr(addr, sdl) |
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register char *addr; |
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register struct sockaddr_dl *sdl; |
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{ |
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register char *cp = sdl->sdl_data; |
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char *cplim = sdl->sdl_len + (char *)sdl; |
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register int byte = 0, state = NAMING, new; |
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|
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bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); |
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sdl->sdl_family = AF_LINK; |
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do { |
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state &= ~LETTER; |
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if ((*addr >= '0') && (*addr <= '9')) { |
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new = *addr - '0'; |
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} else if ((*addr >= 'a') && (*addr <= 'f')) { |
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new = *addr - 'a' + 10; |
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} else if ((*addr >= 'A') && (*addr <= 'F')) { |
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new = *addr - 'A' + 10; |
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} else if (*addr == 0) { |
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state |= END; |
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} else if (state == NAMING && |
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(((*addr >= 'A') && (*addr <= 'Z')) || |
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((*addr >= 'a') && (*addr <= 'z')))) |
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state |= LETTER; |
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else |
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state |= DELIM; |
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addr++; |
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switch (state /* | INPUT */) { |
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case NAMING | DIGIT: |
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case NAMING | LETTER: |
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*cp++ = addr[-1]; continue; |
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case NAMING | DELIM: |
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state = RESET; sdl->sdl_nlen = cp - sdl->sdl_data; continue; |
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case GOTTWO | DIGIT: |
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*cp++ = byte; /*FALLTHROUGH*/ |
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case RESET | DIGIT: |
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state = GOTONE; byte = new; continue; |
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case GOTONE | DIGIT: |
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state = GOTTWO; byte = new + (byte << 4); continue; |
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default: /* | DELIM */ |
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state = RESET; *cp++ = byte; byte = 0; continue; |
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case GOTONE | END: |
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case GOTTWO | END: |
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*cp++ = byte; /* FALLTHROUGH */ |
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case RESET | END: |
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break; |
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} |
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break; |
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} while (cp < cplim); |
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sdl->sdl_alen = cp - LLADDR(sdl); |
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new = cp - (char *)sdl; |
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if (new > sizeof(*sdl)) |
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sdl->sdl_len = new; |
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return; |
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} |
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|
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static char hexlist[] = "0123456789abcdef"; |
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|
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char * |
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link_ntoa(sdl) |
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register struct sockaddr_dl *sdl; |
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{ |
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static char obuf[64]; |
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register char *out = obuf; |
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register int i; |
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register u_char *in = (u_char *)LLADDR(sdl); |
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u_char *inlim = in + sdl->sdl_nlen; |
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int firsttime = 1; |
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|
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if (sdl->sdl_nlen) { |
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bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); |
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out += sdl->sdl_nlen; |
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*out++ = ':'; |
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} |
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while (in < inlim) { |
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if (firsttime) firsttime = 0; else *out++ = '.'; |
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i = *in++; |
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if (i > 0xf) { |
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out[1] = hexlist[i & 0xf]; |
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i >>= 4; |
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out[0] = hexlist[i]; |
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out += 2; |
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} else |
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*out++ = hexlist[i]; |
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} |
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*out = 0; |
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return(obuf); |
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} |
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