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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [linkaddr.c] - Rev 30
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/*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: linkaddr.c,v 1.2 2001-09-27 12:01:53 chris Exp $ */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <sys/socket.h> #include <net/if_dl.h> #include <string.h> /* States*/ #define NAMING 0 #define GOTONE 1 #define GOTTWO 2 #define RESET 3 /* Inputs */ #define DIGIT (4*0) #define END (4*1) #define DELIM (4*2) #define LETTER (4*3) void link_addr(addr, sdl) register const char *addr; register struct sockaddr_dl *sdl; { register char *cp = sdl->sdl_data; char *cplim = sdl->sdl_len + (char *)sdl; register int byte = 0, state = NAMING, new; bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); sdl->sdl_family = AF_LINK; do { state &= ~LETTER; if ((*addr >= '0') && (*addr <= '9')) { new = *addr - '0'; } else if ((*addr >= 'a') && (*addr <= 'f')) { new = *addr - 'a' + 10; } else if ((*addr >= 'A') && (*addr <= 'F')) { new = *addr - 'A' + 10; } else if (*addr == 0) { state |= END; } else if (state == NAMING && (((*addr >= 'A') && (*addr <= 'Z')) || ((*addr >= 'a') && (*addr <= 'z')))) state |= LETTER; else state |= DELIM; addr++; switch (state /* | INPUT */) { case NAMING | DIGIT: case NAMING | LETTER: *cp++ = addr[-1]; continue; case NAMING | DELIM: state = RESET; sdl->sdl_nlen = cp - sdl->sdl_data; continue; case GOTTWO | DIGIT: *cp++ = byte; /* FALLTHROUGH */ case RESET | DIGIT: state = GOTONE; byte = new; continue; case GOTONE | DIGIT: state = GOTTWO; byte = new + (byte << 4); continue; default: /* | DELIM */ state = RESET; *cp++ = byte; byte = 0; continue; case GOTONE | END: case GOTTWO | END: *cp++ = byte; /* FALLTHROUGH */ case RESET | END: break; } break; } while (cp < cplim); sdl->sdl_alen = cp - LLADDR(sdl); new = cp - (char *)sdl; if (new > sizeof(*sdl)) sdl->sdl_len = new; return; } static char hexlist[] = "0123456789abcdef"; char * link_ntoa(sdl) register const struct sockaddr_dl *sdl; { static char obuf[64]; register char *out = obuf; register int i; register u_char *in = (u_char *)LLADDR(sdl); u_char *inlim = in + sdl->sdl_alen; int firsttime = 1; if (sdl->sdl_nlen) { bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); out += sdl->sdl_nlen; if (sdl->sdl_alen) *out++ = ':'; } while (in < inlim) { if (firsttime) firsttime = 0; else *out++ = '.'; i = *in++; if (i > 0xf) { out[1] = hexlist[i & 0xf]; i >>= 4; out[0] = hexlist[i]; out += 2; } else *out++ = hexlist[i]; } *out = 0; return (obuf); }
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