/* * Copyright (c) 1996, 1998 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM 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. */ /* * Portions copyright (c) 1999, 2000 * Intel Corporation. * 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 Intel Corporation and * its contributors. * * 4. Neither the name of Intel Corporation or its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION 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 INTEL CORPORATION 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. * */ #ifndef lint static char rcsid[] = "$Id: ns_print.c,v 1.1.1.1 2003/11/19 01:51:34 kyu3 Exp $"; #endif /* Import. */ #include #include #include #include #include #include #include #include #include #include #define SPRINTF(x) (sprintf x) /* 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 ((ssize_t)(x) < 0) \ return (-1); \ } while (0) /* Public. */ /* * int * ns_sprintrr(handle, rr, name_ctx, origin, buf, buflen) * Convert an RR to presentation format. * return: * 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); } /* * int * ns_sprintrrf(msg, msglen, name, class, type, ttl, rdata, rdlen, * name_ctx, origin, buf, buflen) * Convert the fields of an RR into presentation format. * return: * 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 x; size_t len; static char base64_key[NS_MD5RSA_MAX_BASE64]; static char t[255*3]; /* * Owner. */ if (name_ctx != NULL && strcasecmp(name_ctx, name) == 0) { T(addstr("\t\t\t", 3, &buf, &buflen)); } else { len = prune_origin(name, origin); if (len == 0) { T(addstr("@\t\t\t", 4, &buf, &buflen)); } else { T(addstr(name, len, &buf, &buflen)); /* Origin not used and no trailing dot? */ if ((!origin || !origin[0] || name[len] == '\0') && name[len - 1] != '.') { 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 != NS_INADDRSZ) goto formerr; (void) inet_ntop(AF_INET, rdata, buf, (socklen_t)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: 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. */ 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: { u_int t; if (rdlen < 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 < 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: 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: { (void) inet_nsap_ntoa((int)rdlen, rdata, t); T(addstr(t, strlen(t), &buf, &buflen)); break; } case ns_t_aaaa: if (rdlen != NS_IN6ADDRSZ) goto formerr; (void) inet_ntop(AF_INET6, rdata, buf, (socklen_t)buflen); addlen(strlen(buf), &buf, &buflen); break; case ns_t_loc: { /* 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; if (rdlen < 2*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 ((ssize_t)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; if (rdlen < NS_INT16SZ*3) 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 < NS_INT32SZ + 1) goto formerr; /* Address. */ (void) inet_ntop(AF_INET, rdata, buf, (socklen_t)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: { u_int keyflags, protocol, algorithm; const char *leader; int n; if (rdlen < NS_INT16SZ + NS_INT8SZ + NS_INT8SZ) goto formerr; /* Key flags, Protocol, Algorithm. */ 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 ((ssize_t)len < 0) goto formerr; if (len > 15) { T(addstr(" (", 2, &buf, &buflen)); leader = "\n\t\t"; spaced = 0; } else leader = " "; for (n = 0; n < (int)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_sig: { u_int type, algorithm, labels, footprint; const char *leader; u_long t; int n; if (rdlen < 22) 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 %lu ", p_type((int)type), algorithm, 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 ((ssize_t)len < 0) goto formerr; for (n = 0; n < (int)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 = (int)(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; } default: comment = "unknown RR type"; goto hexify; } return ((int)(buf - obuf)); formerr: comment = "RR format error"; hexify: { int n, m; char *p; len = SPRINTF((tmp, "\\#(\t\t; %s", comment)); T(addstr(tmp, len, &buf, &buflen)); while (rdata < edata) { p = tmp; p += SPRINTF((p, "\n\t")); spaced = 0; n = MIN(16, (int)(edata - rdata)); for (m = 0; m < n; m++) p += SPRINTF((p, "%02x ", rdata[m])); T(addstr(tmp, (u_int)(p - tmp), &buf, &buflen)); if (n < 16) { T(addstr(")", 1, &buf, &buflen)); T(addtab((u_int)(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, (u_int)(p - tmp), &buf, &buflen)); rdata += n; } return ((int)(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 && strcasecmp(name, origin) == 0) return ((size_t)(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 ((size_t)(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 ((int)(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, (int)(*buflen)); if (n < 0) goto enospc; /* Guess. */ newlen = prune_origin(*buf, origin); if ((origin == NULL || origin[0] == '\0' || (*buf)[newlen] == '\0') && (newlen == 0 || (*buf)[newlen - 1] != '.')) { /* No trailing dot. */ if (newlen + 2 > *buflen) goto enospc; /* No room for ".\0". */ (*buf)[newlen++] = '.'; (*buf)[newlen] = '\0'; } if (newlen == 0) { /* Use "@" instead of name. */ if (newlen + 2 > *buflen) goto enospc; /* No room for "@\0". */ (*buf)[newlen++] = '@'; (*buf)[newlen] = '\0'; } *pp += n; addlen(newlen, buf, buflen); **buf = '\0'; return ((int)newlen); enospc: errno = ENOSPC; *buf = save_buf; *buflen = save_buflen; return (-1); } static void addlen(size_t len, char **buf, size_t *buflen) { assert(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 = (int)(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); }