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-rw-r--r--lib/bind/resolv/res_mkupdate.c1162
1 files changed, 1162 insertions, 0 deletions
diff --git a/lib/bind/resolv/res_mkupdate.c b/lib/bind/resolv/res_mkupdate.c
new file mode 100644
index 0000000..4299275
--- /dev/null
+++ b/lib/bind/resolv/res_mkupdate.c
@@ -0,0 +1,1162 @@
+/*
+ * 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.
+ */
+
+/*! \file
+ * \brief
+ * Based on the Dynamic DNS reference implementation by Viraj Bais
+ * <viraj_bais@ccm.fm.intel.com>
+ */
+
+#if !defined(lint) && !defined(SABER)
+static const char rcsid[] = "$Id: res_mkupdate.c,v 1.4.18.4 2005/10/14 05:44:12 marka Exp $";
+#endif /* not lint */
+
+#include "port_before.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <res_update.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#include "port_after.h"
+
+/* Options. Leave them on. */
+#define DEBUG
+#define MAXPORT 1024
+
+static int getnum_str(u_char **, u_char *);
+static int gethexnum_str(u_char **, u_char *);
+static int getword_str(char *, int, u_char **, u_char *);
+static int getstr_str(char *, int, u_char **, u_char *);
+
+#define ShrinkBuffer(x) if ((buflen -= x) < 0) return (-2);
+
+/* Forward. */
+
+int res_protocolnumber(const char *);
+int res_servicenumber(const char *);
+
+/*%
+ * Form update packets.
+ * Returns the size of the resulting packet if no error
+ *
+ * On error,
+ * returns
+ *\li -1 if error in reading a word/number in rdata
+ * portion for update packets
+ *\li -2 if length of buffer passed is insufficient
+ *\li -3 if zone section is not the first section in
+ * the linked list, or section order has a problem
+ *\li -4 on a number overflow
+ *\li -5 unknown operation or no records
+ */
+int
+res_nmkupdate(res_state statp, ns_updrec *rrecp_in, u_char *buf, int buflen) {
+ ns_updrec *rrecp_start = rrecp_in;
+ HEADER *hp;
+ u_char *cp, *sp2, *startp, *endp;
+ int n, i, soanum, multiline;
+ ns_updrec *rrecp;
+ struct in_addr ina;
+ struct in6_addr in6a;
+ char buf2[MAXDNAME];
+ u_char buf3[MAXDNAME];
+ int section, numrrs = 0, counts[ns_s_max];
+ u_int16_t rtype, rclass;
+ u_int32_t n1, rttl;
+ u_char *dnptrs[20], **dpp, **lastdnptr;
+ int siglen, keylen, certlen;
+
+ /*
+ * Initialize header fields.
+ */
+ if ((buf == NULL) || (buflen < HFIXEDSZ))
+ return (-1);
+ memset(buf, 0, HFIXEDSZ);
+ hp = (HEADER *) buf;
+ hp->id = htons(++statp->id);
+ hp->opcode = ns_o_update;
+ hp->rcode = NOERROR;
+ cp = buf + HFIXEDSZ;
+ buflen -= HFIXEDSZ;
+ dpp = dnptrs;
+ *dpp++ = buf;
+ *dpp++ = NULL;
+ lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
+
+ if (rrecp_start == NULL)
+ return (-5);
+ else if (rrecp_start->r_section != S_ZONE)
+ return (-3);
+
+ memset(counts, 0, sizeof counts);
+ for (rrecp = rrecp_start; rrecp; rrecp = NEXT(rrecp, r_glink)) {
+ numrrs++;
+ section = rrecp->r_section;
+ if (section < 0 || section >= ns_s_max)
+ return (-1);
+ counts[section]++;
+ for (i = section + 1; i < ns_s_max; i++)
+ if (counts[i])
+ return (-3);
+ rtype = rrecp->r_type;
+ rclass = rrecp->r_class;
+ rttl = rrecp->r_ttl;
+ /* overload class and type */
+ if (section == S_PREREQ) {
+ rttl = 0;
+ switch (rrecp->r_opcode) {
+ case YXDOMAIN:
+ rclass = C_ANY;
+ rtype = T_ANY;
+ rrecp->r_size = 0;
+ break;
+ case NXDOMAIN:
+ rclass = C_NONE;
+ rtype = T_ANY;
+ rrecp->r_size = 0;
+ break;
+ case NXRRSET:
+ rclass = C_NONE;
+ rrecp->r_size = 0;
+ break;
+ case YXRRSET:
+ if (rrecp->r_size == 0)
+ rclass = C_ANY;
+ break;
+ default:
+ fprintf(stderr,
+ "res_mkupdate: incorrect opcode: %d\n",
+ rrecp->r_opcode);
+ fflush(stderr);
+ return (-1);
+ }
+ } else if (section == S_UPDATE) {
+ switch (rrecp->r_opcode) {
+ case DELETE:
+ rclass = rrecp->r_size == 0 ? C_ANY : C_NONE;
+ break;
+ case ADD:
+ break;
+ default:
+ fprintf(stderr,
+ "res_mkupdate: incorrect opcode: %d\n",
+ rrecp->r_opcode);
+ fflush(stderr);
+ return (-1);
+ }
+ }
+
+ /*
+ * XXX appending default domain to owner name is omitted,
+ * fqdn must be provided
+ */
+ if ((n = dn_comp(rrecp->r_dname, cp, buflen, dnptrs,
+ lastdnptr)) < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n + 2*INT16SZ);
+ PUTSHORT(rtype, cp);
+ PUTSHORT(rclass, cp);
+ if (section == S_ZONE) {
+ if (numrrs != 1 || rrecp->r_type != T_SOA)
+ return (-3);
+ continue;
+ }
+ ShrinkBuffer(INT32SZ + INT16SZ);
+ PUTLONG(rttl, cp);
+ sp2 = cp; /*%< save pointer to length byte */
+ cp += INT16SZ;
+ if (rrecp->r_size == 0) {
+ if (section == S_UPDATE && rclass != C_ANY)
+ return (-1);
+ else {
+ PUTSHORT(0, sp2);
+ continue;
+ }
+ }
+ startp = rrecp->r_data;
+ endp = startp + rrecp->r_size - 1;
+ /* XXX this should be done centrally. */
+ switch (rrecp->r_type) {
+ case T_A:
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ if (!inet_aton(buf2, &ina))
+ return (-1);
+ n1 = ntohl(ina.s_addr);
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(n1, cp);
+ break;
+ case T_CNAME:
+ case T_MB:
+ case T_MG:
+ case T_MR:
+ case T_NS:
+ case T_PTR:
+ case ns_t_dname:
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ break;
+ case T_MINFO:
+ case T_SOA:
+ case T_RP:
+ for (i = 0; i < 2; i++) {
+ if (!getword_str(buf2, sizeof buf2, &startp,
+ endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen,
+ dnptrs, lastdnptr);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ }
+ if (rrecp->r_type == T_SOA) {
+ ShrinkBuffer(5 * INT32SZ);
+ while (isspace(*startp) || !*startp)
+ startp++;
+ if (*startp == '(') {
+ multiline = 1;
+ startp++;
+ } else
+ multiline = 0;
+ /* serial, refresh, retry, expire, minimum */
+ for (i = 0; i < 5; i++) {
+ soanum = getnum_str(&startp, endp);
+ if (soanum < 0)
+ return (-1);
+ PUTLONG(soanum, cp);
+ }
+ if (multiline) {
+ while (isspace(*startp) || !*startp)
+ startp++;
+ if (*startp != ')')
+ return (-1);
+ }
+ }
+ break;
+ case T_MX:
+ case T_AFSDB:
+ case T_RT:
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ break;
+ case T_SRV:
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, NULL, NULL);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ break;
+ case T_PX:
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ PUTSHORT(n, cp);
+ ShrinkBuffer(INT16SZ);
+ for (i = 0; i < 2; i++) {
+ if (!getword_str(buf2, sizeof buf2, &startp,
+ endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, dnptrs,
+ lastdnptr);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ }
+ break;
+ case T_WKS: {
+ char bm[MAXPORT/8];
+ unsigned int maxbm = 0;
+
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ if (!inet_aton(buf2, &ina))
+ return (-1);
+ n1 = ntohl(ina.s_addr);
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(n1, cp);
+
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ if ((i = res_protocolnumber(buf2)) < 0)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = i & 0xff;
+
+ for (i = 0; i < MAXPORT/8 ; i++)
+ bm[i] = 0;
+
+ while (getword_str(buf2, sizeof buf2, &startp, endp)) {
+ if ((n = res_servicenumber(buf2)) <= 0)
+ return (-1);
+
+ if (n < MAXPORT) {
+ bm[n/8] |= (0x80>>(n%8));
+ if ((unsigned)n > maxbm)
+ maxbm = n;
+ } else
+ return (-1);
+ }
+ maxbm = maxbm/8 + 1;
+ ShrinkBuffer(maxbm);
+ memcpy(cp, bm, maxbm);
+ cp += maxbm;
+ break;
+ }
+ case T_HINFO:
+ for (i = 0; i < 2; i++) {
+ if ((n = getstr_str(buf2, sizeof buf2,
+ &startp, endp)) < 0)
+ return (-1);
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ }
+ break;
+ case T_TXT:
+ for (;;) {
+ if ((n = getstr_str(buf2, sizeof buf2,
+ &startp, endp)) < 0) {
+ if (cp != (sp2 + INT16SZ))
+ break;
+ return (-1);
+ }
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ }
+ break;
+ case T_X25:
+ /* RFC1183 */
+ if ((n = getstr_str(buf2, sizeof buf2, &startp,
+ endp)) < 0)
+ return (-1);
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ break;
+ case T_ISDN:
+ /* RFC1183 */
+ if ((n = getstr_str(buf2, sizeof buf2, &startp,
+ endp)) < 0)
+ return (-1);
+ if ((n > 255) || (n == 0))
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ if ((n = getstr_str(buf2, sizeof buf2, &startp,
+ endp)) < 0)
+ n = 0;
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ break;
+ case T_NSAP:
+ if ((n = inet_nsap_addr((char *)startp, (u_char *)buf2, sizeof(buf2))) != 0) {
+ ShrinkBuffer(n);
+ memcpy(cp, buf2, n);
+ cp += n;
+ } else {
+ return (-1);
+ }
+ break;
+ case T_LOC:
+ if ((n = loc_aton((char *)startp, (u_char *)buf2)) != 0) {
+ ShrinkBuffer(n);
+ memcpy(cp, buf2, n);
+ cp += n;
+ } else
+ return (-1);
+ break;
+ case ns_t_sig:
+ {
+ int sig_type, success, dateerror;
+ u_int32_t exptime, timesigned;
+
+ /* type */
+ if ((n = getword_str(buf2, sizeof buf2,
+ &startp, endp)) < 0)
+ return (-1);
+ sig_type = sym_ston(__p_type_syms, buf2, &success);
+ if (!success || sig_type == ns_t_any)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(sig_type, cp);
+ /* alg */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = n;
+ /* labels */
+ n = getnum_str(&startp, endp);
+ if (n <= 0 || n > 255)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = n;
+ /* ottl & expire */
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ exptime = ns_datetosecs(buf2, &dateerror);
+ if (!dateerror) {
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(rttl, cp);
+ }
+ else {
+ char *ulendp;
+ u_int32_t ottl;
+
+ errno = 0;
+ ottl = strtoul(buf2, &ulendp, 10);
+ if (errno != 0 ||
+ (ulendp != NULL && *ulendp != '\0'))
+ return (-1);
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(ottl, cp);
+ if (!getword_str(buf2, sizeof buf2, &startp,
+ endp))
+ return (-1);
+ exptime = ns_datetosecs(buf2, &dateerror);
+ if (dateerror)
+ return (-1);
+ }
+ /* expire */
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(exptime, cp);
+ /* timesigned */
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ timesigned = ns_datetosecs(buf2, &dateerror);
+ if (!dateerror) {
+ ShrinkBuffer(INT32SZ);
+ PUTLONG(timesigned, cp);
+ }
+ else
+ return (-1);
+ /* footprint */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* signer name */
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ /* sig */
+ if ((n = getword_str(buf2, sizeof buf2,
+ &startp, endp)) < 0)
+ return (-1);
+ siglen = b64_pton(buf2, buf3, sizeof(buf3));
+ if (siglen < 0)
+ return (-1);
+ ShrinkBuffer(siglen);
+ memcpy(cp, buf3, siglen);
+ cp += siglen;
+ break;
+ }
+ case ns_t_key:
+ /* flags */
+ n = gethexnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* proto */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = n;
+ /* alg */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = n;
+ /* key */
+ if ((n = getword_str(buf2, sizeof buf2,
+ &startp, endp)) < 0)
+ return (-1);
+ keylen = b64_pton(buf2, buf3, sizeof(buf3));
+ if (keylen < 0)
+ return (-1);
+ ShrinkBuffer(keylen);
+ memcpy(cp, buf3, keylen);
+ cp += keylen;
+ break;
+ case ns_t_nxt:
+ {
+ int success, nxt_type;
+ u_char data[32];
+ int maxtype;
+
+ /* next name */
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, NULL, NULL);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ maxtype = 0;
+ memset(data, 0, sizeof data);
+ for (;;) {
+ if (!getword_str(buf2, sizeof buf2, &startp,
+ endp))
+ break;
+ nxt_type = sym_ston(__p_type_syms, buf2,
+ &success);
+ if (!success || !ns_t_rr_p(nxt_type))
+ return (-1);
+ NS_NXT_BIT_SET(nxt_type, data);
+ if (nxt_type > maxtype)
+ maxtype = nxt_type;
+ }
+ n = maxtype/NS_NXT_BITS+1;
+ ShrinkBuffer(n);
+ memcpy(cp, data, n);
+ cp += n;
+ break;
+ }
+ case ns_t_cert:
+ /* type */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* key tag */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* alg */
+ n = getnum_str(&startp, endp);
+ if (n < 0)
+ return (-1);
+ ShrinkBuffer(1);
+ *cp++ = n;
+ /* cert */
+ if ((n = getword_str(buf2, sizeof buf2,
+ &startp, endp)) < 0)
+ return (-1);
+ certlen = b64_pton(buf2, buf3, sizeof(buf3));
+ if (certlen < 0)
+ return (-1);
+ ShrinkBuffer(certlen);
+ memcpy(cp, buf3, certlen);
+ cp += certlen;
+ break;
+ case ns_t_aaaa:
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ if (inet_pton(AF_INET6, buf2, &in6a) <= 0)
+ return (-1);
+ ShrinkBuffer(NS_IN6ADDRSZ);
+ memcpy(cp, &in6a, NS_IN6ADDRSZ);
+ cp += NS_IN6ADDRSZ;
+ break;
+ case ns_t_naptr:
+ /* Order Preference Flags Service Replacement Regexp */
+ /* Order */
+ n = getnum_str(&startp, endp);
+ if (n < 0 || n > 65535)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* Preference */
+ n = getnum_str(&startp, endp);
+ if (n < 0 || n > 65535)
+ return (-1);
+ ShrinkBuffer(INT16SZ);
+ PUTSHORT(n, cp);
+ /* Flags */
+ if ((n = getstr_str(buf2, sizeof buf2,
+ &startp, endp)) < 0) {
+ return (-1);
+ }
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ /* Service Classes */
+ if ((n = getstr_str(buf2, sizeof buf2,
+ &startp, endp)) < 0) {
+ return (-1);
+ }
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ /* Pattern */
+ if ((n = getstr_str(buf2, sizeof buf2,
+ &startp, endp)) < 0) {
+ return (-1);
+ }
+ if (n > 255)
+ return (-1);
+ ShrinkBuffer(n+1);
+ *cp++ = n;
+ memcpy(cp, buf2, n);
+ cp += n;
+ /* Replacement */
+ if (!getword_str(buf2, sizeof buf2, &startp, endp))
+ return (-1);
+ n = dn_comp(buf2, cp, buflen, NULL, NULL);
+ if (n < 0)
+ return (-1);
+ cp += n;
+ ShrinkBuffer(n);
+ break;
+ default:
+ return (-1);
+ } /*switch*/
+ n = (u_int16_t)((cp - sp2) - INT16SZ);
+ PUTSHORT(n, sp2);
+ } /*for*/
+
+ hp->qdcount = htons(counts[0]);
+ hp->ancount = htons(counts[1]);
+ hp->nscount = htons(counts[2]);
+ hp->arcount = htons(counts[3]);
+ return (cp - buf);
+}
+
+/*%
+ * Get a whitespace delimited word from a string (not file)
+ * into buf. modify the start pointer to point after the
+ * word in the string.
+ */
+static int
+getword_str(char *buf, int size, u_char **startpp, u_char *endp) {
+ char *cp;
+ int c;
+
+ for (cp = buf; *startpp <= endp; ) {
+ c = **startpp;
+ if (isspace(c) || c == '\0') {
+ if (cp != buf) /*%< trailing whitespace */
+ break;
+ else { /*%< leading whitespace */
+ (*startpp)++;
+ continue;
+ }
+ }
+ (*startpp)++;
+ if (cp >= buf+size-1)
+ break;
+ *cp++ = (u_char)c;
+ }
+ *cp = '\0';
+ return (cp != buf);
+}
+
+/*%
+ * get a white spae delimited string from memory. Process quoted strings
+ * and \\DDD escapes. Return length or -1 on error. Returned string may
+ * contain nulls.
+ */
+static char digits[] = "0123456789";
+static int
+getstr_str(char *buf, int size, u_char **startpp, u_char *endp) {
+ char *cp;
+ int c, c1 = 0;
+ int inquote = 0;
+ int seen_quote = 0;
+ int escape = 0;
+ int dig = 0;
+
+ for (cp = buf; *startpp <= endp; ) {
+ if ((c = **startpp) == '\0')
+ break;
+ /* leading white space */
+ if ((cp == buf) && !seen_quote && isspace(c)) {
+ (*startpp)++;
+ continue;
+ }
+
+ switch (c) {
+ case '\\':
+ if (!escape) {
+ escape = 1;
+ dig = 0;
+ c1 = 0;
+ (*startpp)++;
+ continue;
+ }
+ goto do_escape;
+ case '"':
+ if (!escape) {
+ inquote = !inquote;
+ seen_quote = 1;
+ (*startpp)++;
+ continue;
+ }
+ /* fall through */
+ default:
+ do_escape:
+ if (escape) {
+ switch (c) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ c1 = c1 * 10 +
+ (strchr(digits, c) - digits);
+
+ if (++dig == 3) {
+ c = c1 &0xff;
+ break;
+ }
+ (*startpp)++;
+ continue;
+ }
+ escape = 0;
+ } else if (!inquote && isspace(c))
+ goto done;
+ if (cp >= buf+size-1)
+ goto done;
+ *cp++ = (u_char)c;
+ (*startpp)++;
+ }
+ }
+ done:
+ *cp = '\0';
+ return ((cp == buf)? (seen_quote? 0: -1): (cp - buf));
+}
+
+/*%
+ * Get a whitespace delimited base 16 number from a string (not file) into buf
+ * update the start pointer to point after the number in the string.
+ */
+static int
+gethexnum_str(u_char **startpp, u_char *endp) {
+ int c, n;
+ int seendigit = 0;
+ int m = 0;
+
+ if (*startpp + 2 >= endp || strncasecmp((char *)*startpp, "0x", 2) != 0)
+ return getnum_str(startpp, endp);
+ (*startpp)+=2;
+ for (n = 0; *startpp <= endp; ) {
+ c = **startpp;
+ if (isspace(c) || c == '\0') {
+ if (seendigit) /*%< trailing whitespace */
+ break;
+ else { /*%< leading whitespace */
+ (*startpp)++;
+ continue;
+ }
+ }
+ if (c == ';') {
+ while ((*startpp <= endp) &&
+ ((c = **startpp) != '\n'))
+ (*startpp)++;
+ if (seendigit)
+ break;
+ continue;
+ }
+ if (!isxdigit(c)) {
+ if (c == ')' && seendigit) {
+ (*startpp)--;
+ break;
+ }
+ return (-1);
+ }
+ (*startpp)++;
+ if (isdigit(c))
+ n = n * 16 + (c - '0');
+ else
+ n = n * 16 + (tolower(c) - 'a' + 10);
+ seendigit = 1;
+ }
+ return (n + m);
+}
+
+/*%
+ * Get a whitespace delimited base 10 number from a string (not file) into buf
+ * update the start pointer to point after the number in the string.
+ */
+static int
+getnum_str(u_char **startpp, u_char *endp) {
+ int c, n;
+ int seendigit = 0;
+ int m = 0;
+
+ for (n = 0; *startpp <= endp; ) {
+ c = **startpp;
+ if (isspace(c) || c == '\0') {
+ if (seendigit) /*%< trailing whitespace */
+ break;
+ else { /*%< leading whitespace */
+ (*startpp)++;
+ continue;
+ }
+ }
+ if (c == ';') {
+ while ((*startpp <= endp) &&
+ ((c = **startpp) != '\n'))
+ (*startpp)++;
+ if (seendigit)
+ break;
+ continue;
+ }
+ if (!isdigit(c)) {
+ if (c == ')' && seendigit) {
+ (*startpp)--;
+ break;
+ }
+ return (-1);
+ }
+ (*startpp)++;
+ n = n * 10 + (c - '0');
+ seendigit = 1;
+ }
+ return (n + m);
+}
+
+/*%
+ * Allocate a resource record buffer & save rr info.
+ */
+ns_updrec *
+res_mkupdrec(int section, const char *dname,
+ u_int class, u_int type, u_long ttl) {
+ ns_updrec *rrecp = (ns_updrec *)calloc(1, sizeof(ns_updrec));
+
+ if (!rrecp || !(rrecp->r_dname = strdup(dname))) {
+ if (rrecp)
+ free((char *)rrecp);
+ return (NULL);
+ }
+ INIT_LINK(rrecp, r_link);
+ INIT_LINK(rrecp, r_glink);
+ rrecp->r_class = (ns_class)class;
+ rrecp->r_type = (ns_type)type;
+ rrecp->r_ttl = ttl;
+ rrecp->r_section = (ns_sect)section;
+ return (rrecp);
+}
+
+/*%
+ * Free a resource record buffer created by res_mkupdrec.
+ */
+void
+res_freeupdrec(ns_updrec *rrecp) {
+ /* Note: freeing r_dp is the caller's responsibility. */
+ if (rrecp->r_dname != NULL)
+ free(rrecp->r_dname);
+ free(rrecp);
+}
+
+struct valuelist {
+ struct valuelist * next;
+ struct valuelist * prev;
+ char * name;
+ char * proto;
+ int port;
+};
+static struct valuelist *servicelist, *protolist;
+
+static void
+res_buildservicelist() {
+ struct servent *sp;
+ struct valuelist *slp;
+
+#ifdef MAYBE_HESIOD
+ setservent(0);
+#else
+ setservent(1);
+#endif
+ while ((sp = getservent()) != NULL) {
+ slp = (struct valuelist *)malloc(sizeof(struct valuelist));
+ if (!slp)
+ break;
+ slp->name = strdup(sp->s_name);
+ slp->proto = strdup(sp->s_proto);
+ if ((slp->name == NULL) || (slp->proto == NULL)) {
+ if (slp->name) free(slp->name);
+ if (slp->proto) free(slp->proto);
+ free(slp);
+ break;
+ }
+ slp->port = ntohs((u_int16_t)sp->s_port); /*%< host byt order */
+ slp->next = servicelist;
+ slp->prev = NULL;
+ if (servicelist)
+ servicelist->prev = slp;
+ servicelist = slp;
+ }
+ endservent();
+}
+
+void
+res_destroyservicelist() {
+ struct valuelist *slp, *slp_next;
+
+ for (slp = servicelist; slp != NULL; slp = slp_next) {
+ slp_next = slp->next;
+ free(slp->name);
+ free(slp->proto);
+ free(slp);
+ }
+ servicelist = (struct valuelist *)0;
+}
+
+void
+res_buildprotolist(void) {
+ struct protoent *pp;
+ struct valuelist *slp;
+
+#ifdef MAYBE_HESIOD
+ setprotoent(0);
+#else
+ setprotoent(1);
+#endif
+ while ((pp = getprotoent()) != NULL) {
+ slp = (struct valuelist *)malloc(sizeof(struct valuelist));
+ if (!slp)
+ break;
+ slp->name = strdup(pp->p_name);
+ if (slp->name == NULL) {
+ free(slp);
+ break;
+ }
+ slp->port = pp->p_proto; /*%< host byte order */
+ slp->next = protolist;
+ slp->prev = NULL;
+ if (protolist)
+ protolist->prev = slp;
+ protolist = slp;
+ }
+ endprotoent();
+}
+
+void
+res_destroyprotolist(void) {
+ struct valuelist *plp, *plp_next;
+
+ for (plp = protolist; plp != NULL; plp = plp_next) {
+ plp_next = plp->next;
+ free(plp->name);
+ free(plp);
+ }
+ protolist = (struct valuelist *)0;
+}
+
+static int
+findservice(const char *s, struct valuelist **list) {
+ struct valuelist *lp = *list;
+ int n;
+
+ for (; lp != NULL; lp = lp->next)
+ if (strcasecmp(lp->name, s) == 0) {
+ if (lp != *list) {
+ lp->prev->next = lp->next;
+ if (lp->next)
+ lp->next->prev = lp->prev;
+ (*list)->prev = lp;
+ lp->next = *list;
+ *list = lp;
+ }
+ return (lp->port); /*%< host byte order */
+ }
+ if (sscanf(s, "%d", &n) != 1 || n <= 0)
+ n = -1;
+ return (n);
+}
+
+/*%
+ * Convert service name or (ascii) number to int.
+ */
+int
+res_servicenumber(const char *p) {
+ if (servicelist == (struct valuelist *)0)
+ res_buildservicelist();
+ return (findservice(p, &servicelist));
+}
+
+/*%
+ * Convert protocol name or (ascii) number to int.
+ */
+int
+res_protocolnumber(const char *p) {
+ if (protolist == (struct valuelist *)0)
+ res_buildprotolist();
+ return (findservice(p, &protolist));
+}
+
+static struct servent *
+cgetservbyport(u_int16_t port, const char *proto) { /*%< Host byte order. */
+ struct valuelist **list = &servicelist;
+ struct valuelist *lp = *list;
+ static struct servent serv;
+
+ port = ntohs(port);
+ for (; lp != NULL; lp = lp->next) {
+ if (port != (u_int16_t)lp->port) /*%< Host byte order. */
+ continue;
+ if (strcasecmp(lp->proto, proto) == 0) {
+ if (lp != *list) {
+ lp->prev->next = lp->next;
+ if (lp->next)
+ lp->next->prev = lp->prev;
+ (*list)->prev = lp;
+ lp->next = *list;
+ *list = lp;
+ }
+ serv.s_name = lp->name;
+ serv.s_port = htons((u_int16_t)lp->port);
+ serv.s_proto = lp->proto;
+ return (&serv);
+ }
+ }
+ return (0);
+}
+
+static struct protoent *
+cgetprotobynumber(int proto) { /*%< Host byte order. */
+ struct valuelist **list = &protolist;
+ struct valuelist *lp = *list;
+ static struct protoent prot;
+
+ for (; lp != NULL; lp = lp->next)
+ if (lp->port == proto) { /*%< Host byte order. */
+ if (lp != *list) {
+ lp->prev->next = lp->next;
+ if (lp->next)
+ lp->next->prev = lp->prev;
+ (*list)->prev = lp;
+ lp->next = *list;
+ *list = lp;
+ }
+ prot.p_name = lp->name;
+ prot.p_proto = lp->port; /*%< Host byte order. */
+ return (&prot);
+ }
+ return (0);
+}
+
+const char *
+res_protocolname(int num) {
+ static char number[8];
+ struct protoent *pp;
+
+ if (protolist == (struct valuelist *)0)
+ res_buildprotolist();
+ pp = cgetprotobynumber(num);
+ if (pp == 0) {
+ (void) sprintf(number, "%d", num);
+ return (number);
+ }
+ return (pp->p_name);
+}
+
+const char *
+res_servicename(u_int16_t port, const char *proto) { /*%< Host byte order. */
+ static char number[8];
+ struct servent *ss;
+
+ if (servicelist == (struct valuelist *)0)
+ res_buildservicelist();
+ ss = cgetservbyport(htons(port), proto);
+ if (ss == 0) {
+ (void) sprintf(number, "%d", port);
+ return (number);
+ }
+ return (ss->s_name);
+}
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