/* $OpenBSD: etherent.c,v 1.6 1999/07/20 04:49:54 deraadt Exp $ */ /* * Copyright (c) 1990, 1993, 1994, 1995, 1996 * 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: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static const char rcsid[] = "@(#) $Header: /cvs/OpenBSD/src/lib/libpcap/etherent.c,v 1.6 1999/07/20 04:49:54 deraadt Exp $ (LBL)"; #endif #include <sys/types.h> #include <ctype.h> #include <memory.h> #include <stdio.h> #include <string.h> #include "pcap-int.h" #include <pcap-namedb.h> #ifdef HAVE_OS_PROTO_H #include "os-proto.h" #endif static __inline int xdtoi(int); static __inline int skip_space(FILE *); static __inline int skip_line(FILE *); /* Hex digit to integer. */ static __inline int xdtoi(c) register int c; { if (isdigit(c)) return c - '0'; else if (islower(c)) return c - 'a' + 10; else return c - 'A' + 10; } static __inline int skip_space(f) FILE *f; { int c; do { c = getc(f); } while (isspace(c) && c != '\n'); return c; } static __inline int skip_line(f) FILE *f; { int c; do c = getc(f); while (c != '\n' && c != EOF); return c; } struct pcap_etherent * pcap_next_etherent(FILE *fp) { register int c, d, i; char *bp; static struct pcap_etherent e; memset((char *)&e, 0, sizeof(e)); do { /* Find addr */ c = skip_space(fp); if (c == '\n') continue; /* If this is a comment, or first thing on line cannot be etehrnet address, skip the line. */ if (!isxdigit(c)) { c = skip_line(fp); continue; } /* must be the start of an address */ for (i = 0; i < 6; i += 1) { d = xdtoi(c); c = getc(fp); if (isxdigit(c)) { d <<= 4; d |= xdtoi(c); c = getc(fp); } e.addr[i] = d; if (c != ':') break; c = getc(fp); } if (c == EOF) break; /* Must be whitespace */ if (!isspace(c)) { c = skip_line(fp); continue; } c = skip_space(fp); /* hit end of line... */ if (c == '\n') continue; if (c == '#') { c = skip_line(fp); continue; } /* pick up name */ bp = e.name; /* Use 'd' to prevent buffer overflow. */ d = sizeof(e.name) - 1; do { *bp++ = c; c = getc(fp); } while (!isspace(c) && c != EOF && --d > 0); *bp = '\0'; /* Eat trailing junk */ if (c != '\n') (void)skip_line(fp); return &e; } while (c != EOF); return (NULL); }