projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e48725fe KB |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * %sccs.include.redist.c% | |
| 6 | */ | |
| 7 | ||
| 8 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 24fac7d8 | 9 | static char sccsid[] = "@(#)linkaddr.c 5.2 (Berkeley) %G%"; |
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10 | #endif /* LIBC_SCCS and not lint */ |
| 11 | ||
| 12 | #include <sys/types.h> | |
| 13 | #include <sys/socket.h> | |
| 14 | #include <net/if_dl.h> | |
| 24fac7d8 | 15 | #include <string.h> |
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16 | |
| 17 | /* States*/ | |
| 18 | #define NAMING 0 | |
| 19 | #define GOTONE 1 | |
| 20 | #define GOTTWO 2 | |
| 21 | #define RESET 3 | |
| 22 | /* Inputs */ | |
| 23 | #define DIGIT (4*0) | |
| 24 | #define END (4*1) | |
| 25 | #define DELIM (4*2) | |
| 26 | #define LETTER (4*3) | |
| 27 | ||
| 24fac7d8 | 28 | void |
| e48725fe | 29 | link_addr(addr, sdl) |
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30 | register const char *addr; |
| 31 | register struct sockaddr_dl *sdl; | |
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32 | { |
| 33 | register char *cp = sdl->sdl_data; | |
| 34 | char *cplim = sdl->sdl_len + (char *)sdl; | |
| 35 | register int byte = 0, state = NAMING, new; | |
| 36 | ||
| 37 | bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); | |
| 38 | sdl->sdl_family = AF_LINK; | |
| 39 | do { | |
| 40 | state &= ~LETTER; | |
| 41 | if ((*addr >= '0') && (*addr <= '9')) { | |
| 42 | new = *addr - '0'; | |
| 43 | } else if ((*addr >= 'a') && (*addr <= 'f')) { | |
| 44 | new = *addr - 'a' + 10; | |
| 45 | } else if ((*addr >= 'A') && (*addr <= 'F')) { | |
| 46 | new = *addr - 'A' + 10; | |
| 47 | } else if (*addr == 0) { | |
| 48 | state |= END; | |
| 49 | } else if (state == NAMING && | |
| 50 | (((*addr >= 'A') && (*addr <= 'Z')) || | |
| 51 | ((*addr >= 'a') && (*addr <= 'z')))) | |
| 52 | state |= LETTER; | |
| 53 | else | |
| 54 | state |= DELIM; | |
| 55 | addr++; | |
| 56 | switch (state /* | INPUT */) { | |
| 57 | case NAMING | DIGIT: | |
| 58 | case NAMING | LETTER: | |
| 59 | *cp++ = addr[-1]; continue; | |
| 60 | case NAMING | DELIM: | |
| 61 | state = RESET; sdl->sdl_nlen = cp - sdl->sdl_data; continue; | |
| 62 | case GOTTWO | DIGIT: | |
| 63 | *cp++ = byte; /*FALLTHROUGH*/ | |
| 64 | case RESET | DIGIT: | |
| 65 | state = GOTONE; byte = new; continue; | |
| 66 | case GOTONE | DIGIT: | |
| 67 | state = GOTTWO; byte = new + (byte << 4); continue; | |
| 68 | default: /* | DELIM */ | |
| 69 | state = RESET; *cp++ = byte; byte = 0; continue; | |
| 70 | case GOTONE | END: | |
| 71 | case GOTTWO | END: | |
| 72 | *cp++ = byte; /* FALLTHROUGH */ | |
| 73 | case RESET | END: | |
| 74 | break; | |
| 75 | } | |
| 76 | break; | |
| 77 | } while (cp < cplim); | |
| 78 | sdl->sdl_alen = cp - LLADDR(sdl); | |
| 79 | new = cp - (char *)sdl; | |
| 80 | if (new > sizeof(*sdl)) | |
| 81 | sdl->sdl_len = new; | |
| 82 | return; | |
| 83 | } | |
| 84 | ||
| 85 | static char hexlist[] = "0123456789abcdef"; | |
| 86 | ||
| 87 | char * | |
| 88 | link_ntoa(sdl) | |
| 24fac7d8 | 89 | register const struct sockaddr_dl *sdl; |
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90 | { |
| 91 | static char obuf[64]; | |
| 92 | register char *out = obuf; | |
| 93 | register int i; | |
| 94 | register u_char *in = (u_char *)LLADDR(sdl); | |
| 95 | u_char *inlim = in + sdl->sdl_nlen; | |
| 96 | int firsttime = 1; | |
| 97 | ||
| 98 | if (sdl->sdl_nlen) { | |
| 99 | bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); | |
| 100 | out += sdl->sdl_nlen; | |
| 101 | *out++ = ':'; | |
| 102 | } | |
| 103 | while (in < inlim) { | |
| 104 | if (firsttime) firsttime = 0; else *out++ = '.'; | |
| 105 | i = *in++; | |
| 106 | if (i > 0xf) { | |
| 107 | out[1] = hexlist[i & 0xf]; | |
| 108 | i >>= 4; | |
| 109 | out[0] = hexlist[i]; | |
| 110 | out += 2; | |
| 111 | } else | |
| 112 | *out++ = hexlist[i]; | |
| 113 | } | |
| 114 | *out = 0; | |
| 115 | return(obuf); | |
| 116 | } |