/* $OpenBSD: debug.c,v 1.2 1997/03/12 10:42:46 downsj Exp $ */ /* * ++Copyright++ 1985, 1989 * - * Copyright (c) 1985, 1989 * 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. * - * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. * - * --Copyright-- */ #ifndef lint #if 0 static char sccsid[] = "@(#)debug.c 5.26 (Berkeley) 3/21/91"; static char rcsid[] = "$From: debug.c,v 8.10 1996/12/18 04:09:50 vixie Exp $"; #else static char rcsid[] = "$OpenBSD: debug.c,v 1.2 1997/03/12 10:42:46 downsj Exp $"; #endif #endif /* not lint */ /* ******************************************************************************* * * debug.c -- * * Routines to print out packets received from a name server query. * * Modified version of 4.3BSD BIND res_debug.c 5.30 6/27/90 * ******************************************************************************* */ #include #include #include #include #include #include #include #include #include "res.h" #include "conf/portability.h" /* * Imported from res_debug.c */ extern char *_res_resultcodes[]; extern char *_res_opcodes[]; /* * Used to highlight the start of a record when printing it. */ #define INDENT " -> " /* * Print the contents of a query. * This is intended to be primarily a debugging routine. */ Print_query(msg, eom, printHeader) char *msg, *eom; int printHeader; { Fprint_query(msg, eom, printHeader,stdout); } Fprint_query(msg, eom, printHeader,file) u_char *msg, *eom; int printHeader; FILE *file; { register u_char *cp; register HEADER *hp; register int n; short class; short type; /* * Print header fields. */ hp = (HEADER *)msg; cp = msg + HFIXEDSZ; if (printHeader || (_res.options & RES_DEBUG2)) { fprintf(file," HEADER:\n"); fprintf(file,"\topcode = %s", _res_opcodes[hp->opcode]); fprintf(file,", id = %d", ntohs(hp->id)); fprintf(file,", rcode = %s\n", _res_resultcodes[hp->rcode]); fprintf(file,"\theader flags: "); if (hp->qr) { fprintf(file," response"); } else { fprintf(file," query"); } if (hp->aa) fprintf(file,", auth. answer"); if (hp->tc) fprintf(file,", truncation"); if (hp->rd) fprintf(file,", want recursion"); if (hp->ra) fprintf(file,", recursion avail."); if (hp->unused) fprintf(file,", UNUSED-QUERY_BIT"); if (hp->ad) fprintf(file,", authentic data"); if (hp->cd) fprintf(file,", checking disabled"); fprintf(file,"\n\tquestions = %d", ntohs(hp->qdcount)); fprintf(file,", answers = %d", ntohs(hp->ancount)); fprintf(file,", authority records = %d", ntohs(hp->nscount)); fprintf(file,", additional = %d\n\n", ntohs(hp->arcount)); } /* * Print question records. */ if (n = ntohs(hp->qdcount)) { fprintf(file," QUESTIONS:\n"); while (--n >= 0) { fprintf(file,"\t"); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) return; type = _getshort((u_char*)cp); cp += INT16SZ; class = _getshort((u_char*)cp); cp += INT16SZ; fprintf(file,", type = %s", p_type(type)); fprintf(file,", class = %s\n", p_class(class)); } } /* * Print authoritative answer records */ if (n = ntohs(hp->ancount)) { fprintf(file," ANSWERS:\n"); if (type == T_A && n > MAXADDRS) { printf("Limiting response to MAX Addrs = %d \n", MAXADDRS); n = MAXADDRS; } while (--n >= 0) { fprintf(file, INDENT); cp = Print_rr(cp, msg, eom, file); if (cp == NULL) return; } } /* * print name server records */ if (n = ntohs(hp->nscount)) { fprintf(file," AUTHORITY RECORDS:\n"); while (--n >= 0) { fprintf(file, INDENT); cp = Print_rr(cp, msg, eom, file); if (cp == NULL) return; } } /* * print additional records */ if (n = ntohs(hp->arcount)) { fprintf(file," ADDITIONAL RECORDS:\n"); while (--n >= 0) { fprintf(file, INDENT); cp = Print_rr(cp, msg, eom, file); if (cp == NULL) return; } } fprintf(file,"\n------------\n"); } u_char * Print_cdname_sub(cp, msg, eom, file, format) u_char *cp, *msg, *eom; FILE *file; int format; { int n; char name[MAXDNAME]; n = dn_expand(msg, eom, cp, name, sizeof name); if (n < 0) return (NULL); if (name[0] == '\0') { (void) strcpy(name, "(root)"); } if (format) { fprintf(file, "%-30s", name); } else { fputs(name, file); } return (cp + n); } u_char * Print_cdname(cp, msg, eom, file) u_char *cp, *msg, *eom; FILE *file; { return (Print_cdname_sub(cp, msg, eom, file, 0)); } u_char * Print_cdname2(cp, msg, eom, file) u_char *cp, *msg, *eom; FILE *file; { return (Print_cdname_sub(cp, msg, eom, file, 1)); } /* * Print resource record fields in human readable form. */ u_char * Print_rr(ocp, msg, eom, file) u_char *ocp, *msg, *eom; FILE *file; { int type, class, dlen, n, c; u_int32_t rrttl, ttl; struct in_addr inaddr; u_char *cp, *cp1, *cp2; int debug; if ((cp = Print_cdname(ocp, msg, eom, file)) == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } type = _getshort((u_char*)cp); cp += INT16SZ; class = _getshort((u_char*)cp); cp += INT16SZ; rrttl = _getlong((u_char*)cp); cp += INT32SZ; dlen = _getshort((u_char*)cp); cp += INT16SZ; debug = _res.options & (RES_DEBUG|RES_DEBUG2); if (debug) { if (_res.options & RES_DEBUG2) { fprintf(file,"\n\ttype = %s, class = %s, dlen = %d", p_type(type), p_class(class), dlen); } if (type == T_SOA) { fprintf(file,"\n\tttl = %lu (%s)", rrttl, p_time(rrttl)); } (void) putc('\n', file); } cp1 = cp; /* * Print type specific data, if appropriate */ switch (type) { case T_A: switch (class) { case C_IN: case C_HS: bcopy(cp, (char *)&inaddr, INADDRSZ); if (dlen == 4) { fprintf(file,"\tinternet address = %s\n", inet_ntoa(inaddr)); cp += dlen; } else if (dlen == 7) { fprintf(file,"\tinternet address = %s", inet_ntoa(inaddr)); fprintf(file,", protocol = %d", cp[4]); fprintf(file,", port = %d\n", (cp[5] << 8) + cp[6]); cp += dlen; } break; default: fprintf(file,"\taddress, class = %d, len = %d\n", class, dlen); cp += dlen; } break; case T_CNAME: fprintf(file,"\tcanonical name = "); goto doname; case T_MG: fprintf(file,"\tmail group member = "); goto doname; case T_MB: fprintf(file,"\tmail box = "); goto doname; case T_MR: fprintf(file,"\tmailbox rename = "); goto doname; case T_MX: fprintf(file,"\tpreference = %u",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", mail exchanger = "); goto doname; case T_NAPTR: fprintf(file, "\torder = %u",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", preference = %u\n", _getshort((u_char*)cp)); cp += INT16SZ; /* Flags */ n = *cp++; fprintf(file,"\tflags = \"%.*s\"\n", (int)n, cp); cp += n; /* Service */ n = *cp++; fprintf(file,"\tservices = \"%.*s\"\n", (int)n, cp); cp += n; /* Regexp */ n = *cp++; fprintf(file,"\trule = \"%.*s\"\n", (int)n, cp); cp += n; /* Replacement */ fprintf(file,"\treplacement = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(replacement truncated?)\n"); return (NULL); /* compression error */ } (void) putc('\n', file); break; case T_SRV: fprintf(file, "\tpriority = %u",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", weight = %u", _getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", port= %u\n", _getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,"\thost = "); goto doname; case T_PX: fprintf(file,"\tpreference = %u",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", RFC 822 = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } fprintf(file,"\nX.400 = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } (void) putc('\n', file); break; case T_RT: fprintf(file,"\tpreference = %u",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", router = "); goto doname; case T_AFSDB: fprintf(file,"\tsubtype = %d",_getshort((u_char*)cp)); cp += INT16SZ; fprintf(file,", DCE/AFS server = "); goto doname; case T_NS: fprintf(file,"\tnameserver = "); goto doname; case T_PTR: fprintf(file,"\tname = "); doname: cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } (void) putc('\n', file); break; case T_HINFO: cp2 = cp + dlen; if (n = *cp++) { fprintf(file,"\tCPU = %.*s", n, cp); cp += n; } if ((cp < cp2) && (n = *cp++)) { fprintf(file,"\tOS = %.*s\n", n, cp); cp += n; } else fprintf(file, "\n*** Warning *** OS-type missing\n"); break; case T_ISDN: cp2 = cp + dlen; if (n = *cp++) { fprintf(file,"\tISDN = \"%.*s", n, cp); cp += n; } if ((cp < cp2) && (n = *cp++)) { fprintf(file,"-%.*s\"\n", n, cp); cp += n; } else fprintf(file,"\"\n"); break; case T_SOA: if (!debug) (void) putc('\n', file); fprintf(file,"\torigin = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } fprintf(file,"\n\tmail addr = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } fprintf(file,"\n\tserial = %lu", _getlong((u_char*)cp)); cp += INT32SZ; ttl = _getlong((u_char*)cp); fprintf(file,"\n\trefresh = %lu (%s)", ttl, p_time(ttl)); cp += INT32SZ; ttl = _getlong((u_char*)cp); fprintf(file,"\n\tretry = %lu (%s)", ttl, p_time(ttl)); cp += INT32SZ; ttl = _getlong((u_char*)cp); fprintf(file,"\n\texpire = %lu (%s)", ttl, p_time(ttl)); cp += INT32SZ; ttl = _getlong((u_char*)cp); fprintf(file, "\n\tminimum ttl = %lu (%s)\n", ttl, p_time(ttl)); cp += INT32SZ; break; case T_MINFO: if (!debug) (void) putc('\n', file); fprintf(file,"\trequests = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } fprintf(file,"\n\terrors = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } (void) putc('\n', file); break; case T_RP: if (!debug) (void) putc('\n', file); fprintf(file,"\tmailbox = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } fprintf(file,"\n\ttext = "); cp = Print_cdname(cp, msg, eom, file); if (cp == NULL) { fprintf(file, "(name truncated?)\n"); return (NULL); /* compression error */ } (void) putc('\n', file); break; case T_TXT: (void) fputs("\ttext = ", file); cp2 = cp1 + dlen; while (cp < cp2) { (void) putc('"', file); if (n = (unsigned char) *cp++) { for (c = n; c > 0 && cp < cp2; c--) { if ((*cp == '\n') || (*cp == '"') || (*cp == '\\')) (void) putc('\\', file); (void) putc(*cp++, file); } } (void) putc('"', file); if (cp < cp2) (void) putc(' ', file); } (void) putc('\n', file); break; case T_X25: (void) fputs("\tX25 = \"", file); cp2 = cp1 + dlen; while (cp < cp2) { if (n = (unsigned char) *cp++) { for (c = n; c > 0 && cp < cp2; c--) if (*cp == '\n') { (void) putc('\\', file); (void) putc(*cp++, file); } else (void) putc(*cp++, file); } } (void) fputs("\"\n", file); break; case T_NSAP: fprintf(file, "\tnsap = %s\n", inet_nsap_ntoa(dlen, cp, NULL)); cp += dlen; break; case T_AAAA: { char t[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"]; fprintf(file, "\tIPv6 address = %s\n", inet_ntop(AF_INET6, cp, t, sizeof t)); cp += IN6ADDRSZ; break; } case T_UINFO: fprintf(file,"\tuser info = %s\n", cp); cp += dlen; break; case T_UID: case T_GID: if (dlen == 4) { fprintf(file,"\t%cid = %u\n",type == T_UID ? 'u' : 'g', _getlong((u_char*)cp)); cp += INT32SZ; } else { fprintf(file,"\t%cid of length %d?\n", type == T_UID ? 'u' : 'g', dlen); cp += dlen; } break; case T_WKS: { struct protoent *protoPtr; if (dlen < INT32SZ + 1) break; if (!debug) (void) putc('\n', file); bcopy(cp, (char *)&inaddr, INADDRSZ); cp += INT32SZ; if ((protoPtr = getprotobynumber(*cp)) != NULL) { fprintf(file,"\tinet address = %s, protocol = %s\n\t", inet_ntoa(inaddr), protoPtr->p_name); } else { fprintf(file,"\tinet address = %s, protocol = %d\n\t", inet_ntoa(inaddr), *cp); } cp++; n = 0; while (cp < cp1 + dlen) { c = *cp++; do { struct servent *s; if (c & 0200) { s = getservbyport((int)htons(n), protoPtr ? protoPtr->p_name : NULL); if (s != NULL) { fprintf(file," %s", s->s_name); } else { fprintf(file," #%d", n); } } c <<= 1; } while (++n & 07); } putc('\n',file); } break; case T_NULL: fprintf(file, "\tNULL (dlen %d)\n", dlen); cp += dlen; break; default: fprintf(file,"\trecord type %d, interpreted as:\n", type); /* Let resolver library try to print it */ p_rr(ocp, msg, file); cp += dlen; } if (_res.options & RES_DEBUG && type != T_SOA) { fprintf(file,"\tttl = %lu (%s)\n", rrttl, p_time(rrttl)); } if (cp != cp1 + dlen) { fprintf(file, "\n*** Error: record size incorrect (%d != %d)\n\n", cp - cp1, dlen); cp = NULL; } return (cp); }