/* $NetBSD: ns_print.c,v 1.1.1.2 2012/09/09 16:08:03 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996-1999 by Internet Software Consortium. * * 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. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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. */ #ifndef lint static const char rcsid[] = "Id: ns_print.c,v 1.12 2009/03/03 05:29:58 each Exp "; #endif /* Import. */ #include "port_before.h" #include #include #include #include #include #include #include #include #include #include #include #include "port_after.h" #ifdef SPRINTF_CHAR # define SPRINTF(x) strlen(sprintf/**/x) #else # define SPRINTF(x) ((size_t)sprintf x) #endif /* Forward. */ static size_t prune_origin(const char *name, const char *origin); static int charstr(const u_char *rdata, const u_char *edata, char **buf, size_t *buflen); static int addname(const u_char *msg, size_t msglen, const u_char **p, const char *origin, char **buf, size_t *buflen); static void addlen(size_t len, char **buf, size_t *buflen); static int addstr(const char *src, size_t len, char **buf, size_t *buflen); static int addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen); /* Macros. */ #define T(x) \ do { \ if ((x) < 0) \ return (-1); \ } while (0) static const char base32hex[] = "0123456789ABCDEFGHIJKLMNOPQRSTUV=0123456789abcdefghijklmnopqrstuv"; /* Public. */ /*% * Convert an RR to presentation format. * * return: *\li Number of characters written to buf, or -1 (check errno). */ int ns_sprintrr(const ns_msg *handle, const ns_rr *rr, const char *name_ctx, const char *origin, char *buf, size_t buflen) { int n; n = ns_sprintrrf(ns_msg_base(*handle), ns_msg_size(*handle), ns_rr_name(*rr), ns_rr_class(*rr), ns_rr_type(*rr), ns_rr_ttl(*rr), ns_rr_rdata(*rr), ns_rr_rdlen(*rr), name_ctx, origin, buf, buflen); return (n); } /*% * Convert the fields of an RR into presentation format. * * return: *\li Number of characters written to buf, or -1 (check errno). */ int ns_sprintrrf(const u_char *msg, size_t msglen, const char *name, ns_class class, ns_type type, u_long ttl, const u_char *rdata, size_t rdlen, const char *name_ctx, const char *origin, char *buf, size_t buflen) { const char *obuf = buf; const u_char *edata = rdata + rdlen; int spaced = 0; const char *comment; char tmp[100]; int len, x; /* * Owner. */ if (name_ctx != NULL && ns_samename(name_ctx, name) == 1) { T(addstr("\t\t\t", 3, &buf, &buflen)); } else { len = prune_origin(name, origin); if (*name == '\0') { goto root; } else if (len == 0) { T(addstr("@\t\t\t", 4, &buf, &buflen)); } else { T(addstr(name, len, &buf, &buflen)); /* Origin not used or not root, and no trailing dot? */ if (((origin == NULL || origin[0] == '\0') || (origin[0] != '.' && origin[1] != '\0' && name[len] == '\0')) && name[len - 1] != '.') { root: T(addstr(".", 1, &buf, &buflen)); len++; } T(spaced = addtab(len, 24, spaced, &buf, &buflen)); } } /* * TTL, Class, Type. */ T(x = ns_format_ttl(ttl, buf, buflen)); addlen(x, &buf, &buflen); len = SPRINTF((tmp, " %s %s", p_class(class), p_type(type))); T(addstr(tmp, len, &buf, &buflen)); T(spaced = addtab(x + len, 16, spaced, &buf, &buflen)); /* * RData. */ switch (type) { case ns_t_a: if (rdlen != (size_t)NS_INADDRSZ) goto formerr; (void) inet_ntop(AF_INET, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); break; case ns_t_cname: case ns_t_mb: case ns_t_mg: case ns_t_mr: case ns_t_ns: case ns_t_ptr: case ns_t_dname: T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; case ns_t_hinfo: case ns_t_isdn: /* First word. */ T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; T(addstr(" ", 1, &buf, &buflen)); /* Second word, optional in ISDN records. */ if (type == ns_t_isdn && rdata == edata) break; T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; break; case ns_t_soa: { u_long t; /* Server name. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); /* Administrator name. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" (\n", 3, &buf, &buflen)); spaced = 0; if ((edata - rdata) != 5*NS_INT32SZ) goto formerr; /* Serial number. */ t = ns_get32(rdata); rdata += NS_INT32SZ; T(addstr("\t\t\t\t\t", 5, &buf, &buflen)); len = SPRINTF((tmp, "%lu", t)); T(addstr(tmp, len, &buf, &buflen)); T(spaced = addtab(len, 16, spaced, &buf, &buflen)); T(addstr("; serial\n", 9, &buf, &buflen)); spaced = 0; /* Refresh interval. */ t = ns_get32(rdata); rdata += NS_INT32SZ; T(addstr("\t\t\t\t\t", 5, &buf, &buflen)); T(len = ns_format_ttl(t, buf, buflen)); addlen(len, &buf, &buflen); T(spaced = addtab(len, 16, spaced, &buf, &buflen)); T(addstr("; refresh\n", 10, &buf, &buflen)); spaced = 0; /* Retry interval. */ t = ns_get32(rdata); rdata += NS_INT32SZ; T(addstr("\t\t\t\t\t", 5, &buf, &buflen)); T(len = ns_format_ttl(t, buf, buflen)); addlen(len, &buf, &buflen); T(spaced = addtab(len, 16, spaced, &buf, &buflen)); T(addstr("; retry\n", 8, &buf, &buflen)); spaced = 0; /* Expiry. */ t = ns_get32(rdata); rdata += NS_INT32SZ; T(addstr("\t\t\t\t\t", 5, &buf, &buflen)); T(len = ns_format_ttl(t, buf, buflen)); addlen(len, &buf, &buflen); T(spaced = addtab(len, 16, spaced, &buf, &buflen)); T(addstr("; expiry\n", 9, &buf, &buflen)); spaced = 0; /* Minimum TTL. */ t = ns_get32(rdata); rdata += NS_INT32SZ; T(addstr("\t\t\t\t\t", 5, &buf, &buflen)); T(len = ns_format_ttl(t, buf, buflen)); addlen(len, &buf, &buflen); T(addstr(" )", 2, &buf, &buflen)); T(spaced = addtab(len, 16, spaced, &buf, &buflen)); T(addstr("; minimum\n", 10, &buf, &buflen)); break; } case ns_t_mx: case ns_t_afsdb: case ns_t_rt: case ns_t_kx: { u_int t; if (rdlen < (size_t)NS_INT16SZ) goto formerr; /* Priority. */ t = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u ", t)); T(addstr(tmp, len, &buf, &buflen)); /* Target. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } case ns_t_px: { u_int t; if (rdlen < (size_t)NS_INT16SZ) goto formerr; /* Priority. */ t = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u ", t)); T(addstr(tmp, len, &buf, &buflen)); /* Name1. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); /* Name2. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } case ns_t_x25: T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; break; case ns_t_txt: case ns_t_spf: while (rdata < edata) { T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; if (rdata < edata) T(addstr(" ", 1, &buf, &buflen)); } break; case ns_t_nsap: { char t[2+255*3]; (void) inet_nsap_ntoa(rdlen, rdata, t); T(addstr(t, strlen(t), &buf, &buflen)); break; } case ns_t_aaaa: if (rdlen != (size_t)NS_IN6ADDRSZ) goto formerr; (void) inet_ntop(AF_INET6, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); break; case ns_t_loc: { char t[255]; /* XXX protocol format checking? */ (void) loc_ntoa(rdata, t); T(addstr(t, strlen(t), &buf, &buflen)); break; } case ns_t_naptr: { u_int order, preference; char t[50]; if (rdlen < 2U*NS_INT16SZ) goto formerr; /* Order, Precedence. */ order = ns_get16(rdata); rdata += NS_INT16SZ; preference = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((t, "%u %u ", order, preference)); T(addstr(t, len, &buf, &buflen)); /* Flags. */ T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; T(addstr(" ", 1, &buf, &buflen)); /* Service. */ T(len = charstr(rdata, edata, &buf, &buflen)); if (len == 0) goto formerr; rdata += len; T(addstr(" ", 1, &buf, &buflen)); /* Regexp. */ T(len = charstr(rdata, edata, &buf, &buflen)); if (len < 0) return (-1); if (len == 0) goto formerr; rdata += len; T(addstr(" ", 1, &buf, &buflen)); /* Server. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } case ns_t_srv: { u_int priority, weight, port; char t[50]; if (rdlen < 3U*NS_INT16SZ) goto formerr; /* Priority, Weight, Port. */ priority = ns_get16(rdata); rdata += NS_INT16SZ; weight = ns_get16(rdata); rdata += NS_INT16SZ; port = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((t, "%u %u %u ", priority, weight, port)); T(addstr(t, len, &buf, &buflen)); /* Server. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } case ns_t_minfo: case ns_t_rp: /* Name1. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); /* Name2. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; case ns_t_wks: { int n, lcnt; if (rdlen < 1U + NS_INT32SZ) goto formerr; /* Address. */ (void) inet_ntop(AF_INET, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); rdata += NS_INADDRSZ; /* Protocol. */ len = SPRINTF((tmp, " %u ( ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata += NS_INT8SZ; /* Bit map. */ n = 0; lcnt = 0; while (rdata < edata) { u_int c = *rdata++; do { if (c & 0200) { if (lcnt == 0) { T(addstr("\n\t\t\t\t", 5, &buf, &buflen)); lcnt = 10; spaced = 0; } len = SPRINTF((tmp, "%d ", n)); T(addstr(tmp, len, &buf, &buflen)); lcnt--; } c <<= 1; } while (++n & 07); } T(addstr(")", 1, &buf, &buflen)); break; } case ns_t_key: case ns_t_dnskey: { char base64_key[NS_MD5RSA_MAX_BASE64]; u_int keyflags, protocol, algorithm, key_id; const char *leader; int n; if (rdlen < 0U + NS_INT16SZ + NS_INT8SZ + NS_INT8SZ) goto formerr; /* Key flags, Protocol, Algorithm. */ key_id = dst_s_dns_key_id(rdata, edata-rdata); keyflags = ns_get16(rdata); rdata += NS_INT16SZ; protocol = *rdata++; algorithm = *rdata++; len = SPRINTF((tmp, "0x%04x %u %u", keyflags, protocol, algorithm)); T(addstr(tmp, len, &buf, &buflen)); /* Public key data. */ len = b64_ntop(rdata, edata - rdata, base64_key, sizeof base64_key); if (len < 0) goto formerr; if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; for (n = 0; n < len; n += 48) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addstr(base64_key + n, MIN(len - n, 48), &buf, &buflen)); } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); n = SPRINTF((tmp, " ; key_tag= %u", key_id)); T(addstr(tmp, n, &buf, &buflen)); break; } case ns_t_sig: case ns_t_rrsig: { char base64_key[NS_MD5RSA_MAX_BASE64]; u_int type, algorithm, labels, footprint; const char *leader; u_long t; int n; if (rdlen < 22U) goto formerr; /* Type covered, Algorithm, Label count, Original TTL. */ type = ns_get16(rdata); rdata += NS_INT16SZ; algorithm = *rdata++; labels = *rdata++; t = ns_get32(rdata); rdata += NS_INT32SZ; len = SPRINTF((tmp, "%s %d %d %lu ", p_type(type), algorithm, labels, t)); T(addstr(tmp, len, &buf, &buflen)); if (labels > (u_int)dn_count_labels(name)) goto formerr; /* Signature expiry. */ t = ns_get32(rdata); rdata += NS_INT32SZ; len = SPRINTF((tmp, "%s ", p_secstodate(t))); T(addstr(tmp, len, &buf, &buflen)); /* Time signed. */ t = ns_get32(rdata); rdata += NS_INT32SZ; len = SPRINTF((tmp, "%s ", p_secstodate(t))); T(addstr(tmp, len, &buf, &buflen)); /* Signature Footprint. */ footprint = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u ", footprint)); T(addstr(tmp, len, &buf, &buflen)); /* Signer's name. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); /* Signature. */ len = b64_ntop(rdata, edata - rdata, base64_key, sizeof base64_key); if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; if (len < 0) goto formerr; for (n = 0; n < len; n += 48) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addstr(base64_key + n, MIN(len - n, 48), &buf, &buflen)); } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); break; } case ns_t_nxt: { int n, c; /* Next domain name. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); /* Type bit map. */ n = edata - rdata; for (c = 0; c < n*8; c++) if (NS_NXT_BIT_ISSET(c, rdata)) { len = SPRINTF((tmp, " %s", p_type(c))); T(addstr(tmp, len, &buf, &buflen)); } break; } case ns_t_cert: { u_int c_type, key_tag, alg; int n; unsigned int siz; char base64_cert[8192], tmp[40]; const char *leader; c_type = ns_get16(rdata); rdata += NS_INT16SZ; key_tag = ns_get16(rdata); rdata += NS_INT16SZ; alg = (u_int) *rdata++; len = SPRINTF((tmp, "%d %d %d ", c_type, key_tag, alg)); T(addstr(tmp, len, &buf, &buflen)); siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */ if (siz > sizeof(base64_cert) * 3/4) { const char *str = "record too long to print"; T(addstr(str, strlen(str), &buf, &buflen)); } else { len = b64_ntop(rdata, edata-rdata, base64_cert, siz); if (len < 0) goto formerr; else if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; for (n = 0; n < len; n += 48) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addstr(base64_cert + n, MIN(len - n, 48), &buf, &buflen)); } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); } break; } case ns_t_tkey: { /* KJD - need to complete this */ u_long t; int mode, err, keysize; /* Algorithm name. */ T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); /* Inception. */ t = ns_get32(rdata); rdata += NS_INT32SZ; len = SPRINTF((tmp, "%s ", p_secstodate(t))); T(addstr(tmp, len, &buf, &buflen)); /* Experation. */ t = ns_get32(rdata); rdata += NS_INT32SZ; len = SPRINTF((tmp, "%s ", p_secstodate(t))); T(addstr(tmp, len, &buf, &buflen)); /* Mode , Error, Key Size. */ /* Priority, Weight, Port. */ mode = ns_get16(rdata); rdata += NS_INT16SZ; err = ns_get16(rdata); rdata += NS_INT16SZ; keysize = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize)); T(addstr(tmp, len, &buf, &buflen)); /* XXX need to dump key, print otherdata length & other data */ break; } case ns_t_tsig: { /* BEW - need to complete this */ int n; T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); rdata += 8; /*%< time */ n = ns_get16(rdata); rdata += INT16SZ; rdata += n; /*%< sig */ n = ns_get16(rdata); rdata += INT16SZ; /*%< original id */ sprintf(buf, "%d", ns_get16(rdata)); rdata += INT16SZ; addlen(strlen(buf), &buf, &buflen); break; } case ns_t_a6: { struct in6_addr a; int pbyte, pbit; /* prefix length */ if (rdlen == 0U) goto formerr; len = SPRINTF((tmp, "%d ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); pbit = *rdata; if (pbit > 128) goto formerr; pbyte = (pbit & ~7) / 8; rdata++; /* address suffix: provided only when prefix len != 128 */ if (pbit < 128) { if (rdata + pbyte >= edata) goto formerr; memset(&a, 0, sizeof(a)); memcpy(&a.s6_addr[pbyte], rdata, sizeof(a) - pbyte); (void) inet_ntop(AF_INET6, &a, buf, buflen); addlen(strlen(buf), &buf, &buflen); rdata += sizeof(a) - pbyte; } /* prefix name: provided only when prefix len > 0 */ if (pbit == 0) break; if (rdata >= edata) goto formerr; T(addstr(" ", 1, &buf, &buflen)); T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } case ns_t_opt: { len = SPRINTF((tmp, "%u bytes", class)); T(addstr(tmp, len, &buf, &buflen)); break; } case ns_t_ds: case ns_t_dlv: case ns_t_sshfp: { u_int t; if (type == ns_t_ds || type == ns_t_dlv) { if (rdlen < 4U) goto formerr; t = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u ", t)); T(addstr(tmp, len, &buf, &buflen)); } else if (rdlen < 2U) goto formerr; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; while (rdata < edata) { len = SPRINTF((tmp, "%02X", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; } break; } case ns_t_nsec3: case ns_t_nsec3param: { u_int t, w, l, j, k, c; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; t = ns_get16(rdata); rdata += NS_INT16SZ; len = SPRINTF((tmp, "%u ", t)); T(addstr(tmp, len, &buf, &buflen)); t = *rdata++; if (t == 0) { T(addstr("-", 1, &buf, &buflen)); } else { while (t-- > 0) { len = SPRINTF((tmp, "%02X", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; } } if (type == ns_t_nsec3param) break; T(addstr(" ", 1, &buf, &buflen)); t = *rdata++; while (t > 0) { switch (t) { case 1: tmp[0] = base32hex[((rdata[0]>>3)&0x1f)]; tmp[1] = base32hex[((rdata[0]<<2)&0x1c)]; tmp[2] = tmp[3] = tmp[4] = '='; tmp[5] = tmp[6] = tmp[7] = '='; break; case 2: tmp[0] = base32hex[((rdata[0]>>3)&0x1f)]; tmp[1] = base32hex[((rdata[0]<<2)&0x1c)| ((rdata[1]>>6)&0x03)]; tmp[2] = base32hex[((rdata[1]>>1)&0x1f)]; tmp[3] = base32hex[((rdata[1]<<4)&0x10)]; tmp[4] = tmp[5] = tmp[6] = tmp[7] = '='; break; case 3: tmp[0] = base32hex[((rdata[0]>>3)&0x1f)]; tmp[1] = base32hex[((rdata[0]<<2)&0x1c)| ((rdata[1]>>6)&0x03)]; tmp[2] = base32hex[((rdata[1]>>1)&0x1f)]; tmp[3] = base32hex[((rdata[1]<<4)&0x10)| ((rdata[2]>>4)&0x0f)]; tmp[4] = base32hex[((rdata[2]<<1)&0x1e)]; tmp[5] = tmp[6] = tmp[7] = '='; break; case 4: tmp[0] = base32hex[((rdata[0]>>3)&0x1f)]; tmp[1] = base32hex[((rdata[0]<<2)&0x1c)| ((rdata[1]>>6)&0x03)]; tmp[2] = base32hex[((rdata[1]>>1)&0x1f)]; tmp[3] = base32hex[((rdata[1]<<4)&0x10)| ((rdata[2]>>4)&0x0f)]; tmp[4] = base32hex[((rdata[2]<<1)&0x1e)| ((rdata[3]>>7)&0x01)]; tmp[5] = base32hex[((rdata[3]>>2)&0x1f)]; tmp[6] = base32hex[(rdata[3]<<3)&0x18]; tmp[7] = '='; break; default: tmp[0] = base32hex[((rdata[0]>>3)&0x1f)]; tmp[1] = base32hex[((rdata[0]<<2)&0x1c)| ((rdata[1]>>6)&0x03)]; tmp[2] = base32hex[((rdata[1]>>1)&0x1f)]; tmp[3] = base32hex[((rdata[1]<<4)&0x10)| ((rdata[2]>>4)&0x0f)]; tmp[4] = base32hex[((rdata[2]<<1)&0x1e)| ((rdata[3]>>7)&0x01)]; tmp[5] = base32hex[((rdata[3]>>2)&0x1f)]; tmp[6] = base32hex[((rdata[3]<<3)&0x18)| ((rdata[4]>>5)&0x07)]; tmp[7] = base32hex[(rdata[4]&0x1f)]; break; } T(addstr(tmp, 8, &buf, &buflen)); if (t >= 5) { rdata += 5; t -= 5; } else { rdata += t; t -= t; } } while (rdata < edata) { w = *rdata++; l = *rdata++; for (j = 0; j < l; j++) { if (rdata[j] == 0) continue; for (k = 0; k < 8; k++) { if ((rdata[j] & (0x80 >> k)) == 0) continue; c = w * 256 + j * 8 + k; len = SPRINTF((tmp, " %s", p_type(c))); T(addstr(tmp, len, &buf, &buflen)); } } rdata += l; } break; } case ns_t_nsec: { u_int w, l, j, k, c; T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); while (rdata < edata) { w = *rdata++; l = *rdata++; for (j = 0; j < l; j++) { if (rdata[j] == 0) continue; for (k = 0; k < 8; k++) { if ((rdata[j] & (0x80 >> k)) == 0) continue; c = w * 256 + j * 8 + k; len = SPRINTF((tmp, " %s", p_type(c))); T(addstr(tmp, len, &buf, &buflen)); } } rdata += l; } break; } case ns_t_dhcid: { int n; unsigned int siz; char base64_dhcid[8192]; const char *leader; siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */ if (siz > sizeof(base64_dhcid) * 3/4) { const char *str = "record too long to print"; T(addstr(str, strlen(str), &buf, &buflen)); } else { len = b64_ntop(rdata, edata-rdata, base64_dhcid, siz); if (len < 0) goto formerr; else if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; for (n = 0; n < len; n += 48) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addstr(base64_dhcid + n, MIN(len - n, 48), &buf, &buflen)); } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); } } case ns_t_ipseckey: { int n; unsigned int siz; char base64_key[8192]; const char *leader; if (rdlen < 2) goto formerr; switch (rdata[1]) { case 0: case 3: if (rdlen < 3) goto formerr; break; case 1: if (rdlen < 7) goto formerr; break; case 2: if (rdlen < 19) goto formerr; break; default: comment = "unknown IPSECKEY gateway type"; goto hexify; } len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; len = SPRINTF((tmp, "%u ", *rdata)); T(addstr(tmp, len, &buf, &buflen)); rdata++; switch (rdata[-2]) { case 0: T(addstr(".", 1, &buf, &buflen)); break; case 1: (void) inet_ntop(AF_INET, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); rdata += 4; break; case 2: (void) inet_ntop(AF_INET6, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); rdata += 16; break; case 3: T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; } if (rdata >= edata) break; siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */ if (siz > sizeof(base64_key) * 3/4) { const char *str = "record too long to print"; T(addstr(str, strlen(str), &buf, &buflen)); } else { len = b64_ntop(rdata, edata-rdata, base64_key, siz); if (len < 0) goto formerr; else if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; for (n = 0; n < len; n += 48) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addstr(base64_key + n, MIN(len - n, 48), &buf, &buflen)); } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); } } case ns_t_hip: { unsigned int i, hip_len, algorithm, key_len; char base64_key[NS_MD5RSA_MAX_BASE64]; unsigned int siz; const char *leader = "\n\t\t\t\t\t"; hip_len = *rdata++; algorithm = *rdata++; key_len = ns_get16(rdata); rdata += NS_INT16SZ; siz = key_len*4/3 + 4; /* "+4" accounts for trailing \0 */ if (siz > sizeof(base64_key) * 3/4) { const char *str = "record too long to print"; T(addstr(str, strlen(str), &buf, &buflen)); } else { len = sprintf(tmp, "( %u ", algorithm); T(addstr(tmp, len, &buf, &buflen)); for (i = 0; i < hip_len; i++) { len = sprintf(tmp, "%02X", *rdata); T(addstr(tmp, len, &buf, &buflen)); rdata++; } T(addstr(leader, strlen(leader), &buf, &buflen)); len = b64_ntop(rdata, key_len, base64_key, siz); if (len < 0) goto formerr; T(addstr(base64_key, len, &buf, &buflen)); rdata += key_len; while (rdata < edata) { T(addstr(leader, strlen(leader), &buf, &buflen)); T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); } T(addstr(" )", 2, &buf, &buflen)); } break; } default: comment = "unknown RR type"; goto hexify; } return (buf - obuf); formerr: comment = "RR format error"; hexify: { int n, m; char *p; len = SPRINTF((tmp, "\\# %u%s\t; %s", (unsigned)(edata - rdata), rdlen != 0U ? " (" : "", comment)); T(addstr(tmp, len, &buf, &buflen)); while (rdata < edata) { p = tmp; p += SPRINTF((p, "\n\t")); spaced = 0; n = MIN(16, edata - rdata); for (m = 0; m < n; m++) p += SPRINTF((p, "%02x ", rdata[m])); T(addstr(tmp, p - tmp, &buf, &buflen)); if (n < 16) { T(addstr(")", 1, &buf, &buflen)); T(addtab(p - tmp + 1, 48, spaced, &buf, &buflen)); } p = tmp; p += SPRINTF((p, "; ")); for (m = 0; m < n; m++) *p++ = (isascii(rdata[m]) && isprint(rdata[m])) ? rdata[m] : '.'; T(addstr(tmp, p - tmp, &buf, &buflen)); rdata += n; } return (buf - obuf); } } /* Private. */ /*% * size_t * prune_origin(name, origin) * Find out if the name is at or under the current origin. * return: * Number of characters in name before start of origin, * or length of name if origin does not match. * notes: * This function should share code with samedomain(). */ static size_t prune_origin(const char *name, const char *origin) { const char *oname = name; while (*name != '\0') { if (origin != NULL && ns_samename(name, origin) == 1) return (name - oname - (name > oname)); while (*name != '\0') { if (*name == '\\') { name++; /* XXX need to handle \nnn form. */ if (*name == '\0') break; } else if (*name == '.') { name++; break; } name++; } } return (name - oname); } /*% * int * charstr(rdata, edata, buf, buflen) * Format a into the presentation buffer. * return: * Number of rdata octets consumed * 0 for protocol format error * -1 for output buffer error * side effects: * buffer is advanced on success. */ static int charstr(const u_char *rdata, const u_char *edata, char **buf, size_t *buflen) { const u_char *odata = rdata; size_t save_buflen = *buflen; char *save_buf = *buf; if (addstr("\"", 1, buf, buflen) < 0) goto enospc; if (rdata < edata) { int n = *rdata; if (rdata + 1 + n <= edata) { rdata++; while (n-- > 0) { if (strchr("\n\"\\", *rdata) != NULL) if (addstr("\\", 1, buf, buflen) < 0) goto enospc; if (addstr((const char *)rdata, 1, buf, buflen) < 0) goto enospc; rdata++; } } } if (addstr("\"", 1, buf, buflen) < 0) goto enospc; return (rdata - odata); enospc: errno = ENOSPC; *buf = save_buf; *buflen = save_buflen; return (-1); } static int addname(const u_char *msg, size_t msglen, const u_char **pp, const char *origin, char **buf, size_t *buflen) { size_t newlen, save_buflen = *buflen; char *save_buf = *buf; int n; n = dn_expand(msg, msg + msglen, *pp, *buf, *buflen); if (n < 0) goto enospc; /*%< Guess. */ newlen = prune_origin(*buf, origin); if (**buf == '\0') { goto root; } else if (newlen == 0U) { /* Use "@" instead of name. */ if (newlen + 2 > *buflen) goto enospc; /* No room for "@\0". */ (*buf)[newlen++] = '@'; (*buf)[newlen] = '\0'; } else { if (((origin == NULL || origin[0] == '\0') || (origin[0] != '.' && origin[1] != '\0' && (*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') { /* No trailing dot. */ root: if (newlen + 2 > *buflen) goto enospc; /* No room for ".\0". */ (*buf)[newlen++] = '.'; (*buf)[newlen] = '\0'; } } *pp += n; addlen(newlen, buf, buflen); **buf = '\0'; return (newlen); enospc: errno = ENOSPC; *buf = save_buf; *buflen = save_buflen; return (-1); } static void addlen(size_t len, char **buf, size_t *buflen) { INSIST(len <= *buflen); *buf += len; *buflen -= len; } static int addstr(const char *src, size_t len, char **buf, size_t *buflen) { if (len >= *buflen) { errno = ENOSPC; return (-1); } memcpy(*buf, src, len); addlen(len, buf, buflen); **buf = '\0'; return (0); } static int addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen) { size_t save_buflen = *buflen; char *save_buf = *buf; int t; if (spaced || len >= target - 1) { T(addstr(" ", 2, buf, buflen)); spaced = 1; } else { for (t = (target - len - 1) / 8; t >= 0; t--) if (addstr("\t", 1, buf, buflen) < 0) { *buflen = save_buflen; *buf = save_buf; return (-1); } spaced = 0; } return (spaced); } /*! \file */