+++ /dev/null
-/*\r
- * ++Copyright++ 1985, 1988, 1993\r
- * -\r
- * Copyright (c) 1985, 1988, 1993\r
- * The Regents of the University of California. All rights reserved.\r
- *\r
- * Redistribution and use in source and binary forms, with or without\r
- * modification, are permitted provided that the following conditions\r
- * are met:\r
- * 1. Redistributions of source code must retain the above copyright\r
- * notice, this list of conditions and the following disclaimer.\r
- * 2. Redistributions in binary form must reproduce the above copyright\r
- * notice, this list of conditions and the following disclaimer in the\r
- * documentation and/or other materials provided with the distribution.\r
- * 3. All advertising materials mentioning features or use of this software\r
- * must display the following acknowledgement:\r
- * This product includes software developed by the University of\r
- * California, Berkeley and its contributors.\r
- * 4. Neither the name of the University nor the names of its contributors\r
- * may be used to endorse or promote products derived from this software\r
- * without specific prior written permission.\r
- *\r
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
- * SUCH DAMAGE.\r
- * -\r
- * Portions Copyright (c) 1993 by Digital Equipment Corporation.\r
- *\r
- * Permission to use, copy, modify, and distribute this software for any\r
- * purpose with or without fee is hereby granted, provided that the above\r
- * copyright notice and this permission notice appear in all copies, and that\r
- * the name of Digital Equipment Corporation not be used in advertising or\r
- * publicity pertaining to distribution of the document or software without\r
- * specific, written prior permission.\r
- *\r
- * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL\r
- * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES\r
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT\r
- * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
- * SOFTWARE.\r
- * -\r
- * --Copyright--\r
- */\r
-\r
-/*\r
- * Portions copyright (c) 1999, 2000\r
- * Intel Corporation.\r
- * All rights reserved.\r
- * \r
- * Redistribution and use in source and binary forms, with or without\r
- * modification, are permitted provided that the following conditions\r
- * are met:\r
- * \r
- * 1. Redistributions of source code must retain the above copyright\r
- * notice, this list of conditions and the following disclaimer.\r
- * \r
- * 2. Redistributions in binary form must reproduce the above copyright\r
- * notice, this list of conditions and the following disclaimer in the\r
- * documentation and/or other materials provided with the distribution.\r
- * \r
- * 3. All advertising materials mentioning features or use of this software\r
- * must display the following acknowledgement:\r
- * \r
- * This product includes software developed by Intel Corporation and\r
- * its contributors.\r
- * \r
- * 4. Neither the name of Intel Corporation or its contributors may be\r
- * used to endorse or promote products derived from this software\r
- * without specific prior written permission.\r
- * \r
- * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
- * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
- * THE POSSIBILITY OF SUCH DAMAGE.\r
- * \r
- */\r
-\r
-#if defined(LIBC_SCCS) && !defined(lint)\r
-static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";\r
-static char fromrcsid[] = "From: Id: gethnamaddr.c,v 8.23 1998/04/07 04:59:46 vixie Exp $";\r
-static char rcsid[] = "$Id: gethostbydns.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";\r
-#endif /* LIBC_SCCS and not lint */\r
-\r
-#include <sys/types.h>\r
-#include <sys/param.h>\r
-#include <sys/socket.h>\r
-#include <netinet/in.h>\r
-#include <arpa/inet.h>\r
-#include <arpa/nameser.h>\r
-\r
-#include <stdio.h>\r
-#include <unistd.h>\r
-#include <string.h>\r
-#include <netdb.h>\r
-#include <resolv.h>\r
-#include <ctype.h>\r
-#include <errno.h>\r
-#ifdef _ORG_FREEBSD_\r
-#include <syslog.h>\r
-#else\r
-#include <stdlib.h>\r
-u_int32_t _getlong(const u_char *src);\r
-u_int16_t _getshort(const u_char *src);\r
-#endif\r
-\r
-#include "res_config.h"\r
-#include "Socklib_internals.h"\r
-\r
-#define SPRINTF(x) ((size_t)sprintf x)\r
-\r
-#define MAXALIASES 35\r
-#define MAXADDRS 35\r
-\r
-#ifdef _ORG_FREEBSD_\r
-static const char AskedForGot[] =\r
- "gethostby*.gethostanswer: asked for \"%s\", got \"%s\"";\r
-#endif\r
-\r
-static char *h_addr_ptrs[MAXADDRS + 1];\r
-\r
-static struct hostent host;\r
-static char *host_aliases[MAXALIASES];\r
-static char hostbuf[8*1024];\r
-static u_char host_addr[16]; /* IPv4 or IPv6 */\r
-\r
-#ifdef RESOLVSORT\r
-static void addrsort(char **, int);\r
-#endif\r
-\r
-#if PACKETSZ > 1024\r
-#define MAXPACKET PACKETSZ\r
-#else\r
-#define MAXPACKET 1024\r
-#endif\r
-\r
-typedef union {\r
- HEADER hdr;\r
- u_char buf[MAXPACKET];\r
-} querybuf;\r
-\r
-typedef union {\r
- int32_t al;\r
- char ac;\r
-} align;\r
-\r
-extern int h_errno;\r
-int _dns_ttl_;\r
-\r
-#ifdef DEBUG_RES\r
-static void\r
-dprintf(char *msg, int num)\r
-{\r
- if (_res.options & RES_DEBUG) {\r
- int save = errno;\r
-\r
- printf(msg, num);\r
- errno = save;\r
- }\r
-}\r
-#else\r
-# define dprintf(msg, num) /*nada*/\r
-#endif\r
-\r
-#define BOUNDED_INCR(x) \\r
- do { \\r
- cp += x; \\r
- if (cp > eom) { \\r
- h_errno = NO_RECOVERY; \\r
- return (NULL); \\r
- } \\r
- } while (0)\r
-\r
-#define BOUNDS_CHECK(ptr, count) \\r
- do { \\r
- if ((ptr) + (count) > eom) { \\r
- h_errno = NO_RECOVERY; \\r
- return (NULL); \\r
- } \\r
- } while (0)\r
-\r
-static struct hostent *\r
-gethostanswer(const querybuf *answer, int anslen, const char *qname, int qtype)\r
-{\r
- register const HEADER *hp;\r
- register const u_char *cp;\r
- register int n;\r
- const u_char *eom, *erdata;\r
- char *bp, **ap, **hap;\r
- int type, class, buflen, ancount, qdcount;\r
- int haveanswer, had_error;\r
- int toobig = 0;\r
- char tbuf[MAXDNAME];\r
- const char *tname;\r
- int (*name_ok)(const char *);\r
-\r
- tname = qname;\r
- host.h_name = NULL;\r
- eom = answer->buf + anslen;\r
- switch (qtype) {\r
- case T_A:\r
- case T_AAAA:\r
- name_ok = res_hnok;\r
- break;\r
- case T_PTR:\r
- name_ok = res_dnok;\r
- break;\r
- default:\r
- h_errno = NO_RECOVERY;\r
- return (NULL); /* XXX should be abort(); */\r
- }\r
- /*\r
- * find first satisfactory answer\r
- */\r
- hp = &answer->hdr;\r
- ancount = ntohs(hp->ancount);\r
- qdcount = ntohs(hp->qdcount);\r
- bp = hostbuf;\r
- buflen = sizeof hostbuf;\r
- cp = answer->buf;\r
- BOUNDED_INCR(HFIXEDSZ);\r
- if (qdcount != 1) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- n = dn_expand(answer->buf, eom, cp, bp, buflen);\r
- if ((n < 0) || !(*name_ok)(bp)) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- BOUNDED_INCR(n + QFIXEDSZ);\r
- if (qtype == T_A || qtype == T_AAAA) {\r
- /* res_send() has already verified that the query name is the\r
- * same as the one we sent; this just gets the expanded name\r
- * (i.e., with the succeeding search-domain tacked on).\r
- */\r
- n = (int)strlen(bp) + 1; /* for the \0 */\r
- if (n >= MAXHOSTNAMELEN) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- host.h_name = bp;\r
- bp += n;\r
- buflen -= n;\r
- /* The qname can be abbreviated, but h_name is now absolute. */\r
- qname = host.h_name;\r
- }\r
- ap = host_aliases;\r
- *ap = NULL;\r
- host.h_aliases = host_aliases;\r
- hap = h_addr_ptrs;\r
- *hap = NULL;\r
- host.h_addr_list = h_addr_ptrs;\r
- haveanswer = 0;\r
- had_error = 0;\r
- _dns_ttl_ = -1;\r
- while (ancount-- > 0 && cp < eom && !had_error) {\r
- n = dn_expand(answer->buf, eom, cp, bp, buflen);\r
- if ((n < 0) || !(*name_ok)(bp)) {\r
- had_error++;\r
- continue;\r
- }\r
- cp += n; /* name */\r
- BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);\r
- type = _getshort(cp);\r
- cp += INT16SZ; /* type */\r
- class = _getshort(cp);\r
- cp += INT16SZ; /* class */\r
- if (qtype == T_A && type == T_A)\r
- _dns_ttl_ = _getlong(cp);\r
- cp += INT32SZ; /* TTL */\r
- n = _getshort(cp);\r
- cp += INT16SZ; /* len */\r
- BOUNDS_CHECK(cp, n);\r
- erdata = cp + n;\r
- if (class != C_IN) {\r
- /* XXX - debug? syslog? */\r
- cp += n;\r
- continue; /* XXX - had_error++ ? */\r
- }\r
- if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) {\r
- if (ap >= &host_aliases[MAXALIASES-1])\r
- continue;\r
- n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);\r
- if ((n < 0) || !(*name_ok)(tbuf)) {\r
- had_error++;\r
- continue;\r
- }\r
- cp += n;\r
- if (cp != erdata) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- /* Store alias. */\r
- *ap++ = bp;\r
- n = (int)strlen(bp) + 1; /* for the \0 */\r
- if (n >= MAXHOSTNAMELEN) {\r
- had_error++;\r
- continue;\r
- }\r
- bp += n;\r
- buflen -= n;\r
- /* Get canonical name. */\r
- n = (int)strlen(tbuf) + 1; /* for the \0 */\r
- if (n > buflen || n >= MAXHOSTNAMELEN) {\r
- had_error++;\r
- continue;\r
- }\r
- strcpy(bp, tbuf);\r
- host.h_name = bp;\r
- bp += n;\r
- buflen -= n;\r
- continue;\r
- }\r
- if (qtype == T_PTR && type == T_CNAME) {\r
- n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);\r
- if (n < 0 || !res_dnok(tbuf)) {\r
- had_error++;\r
- continue;\r
- }\r
- cp += n;\r
- if (cp != erdata) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- /* Get canonical name. */\r
- n = (int)strlen(tbuf) + 1; /* for the \0 */\r
- if (n > buflen || n >= MAXHOSTNAMELEN) {\r
- had_error++;\r
- continue;\r
- }\r
- strcpy(bp, tbuf);\r
- tname = bp;\r
- bp += n;\r
- buflen -= n;\r
- continue;\r
- }\r
- if (type != qtype) {\r
-#ifdef _ORG_FREEBSD_\r
- syslog(LOG_NOTICE|LOG_AUTH,\r
- "gethostby*.gethostanswer: asked for \"%s %s %s\", got type \"%s\"",\r
- qname, p_class(C_IN), p_type(qtype),\r
- p_type(type));\r
-#endif\r
- cp += n;\r
- continue; /* XXX - had_error++ ? */\r
- }\r
- switch (type) {\r
- case T_PTR:\r
- if (strcasecmp(tname, bp) != 0) {\r
-#ifdef _ORG_FREEBSD_\r
- syslog(LOG_NOTICE|LOG_AUTH,\r
- AskedForGot, qname, bp);\r
-#endif\r
- cp += n;\r
- continue; /* XXX - had_error++ ? */\r
- }\r
- n = dn_expand(answer->buf, eom, cp, bp, buflen);\r
- if ((n < 0) || !res_hnok(bp)) {\r
- had_error++;\r
- break;\r
- }\r
-#if MULTI_PTRS_ARE_ALIASES\r
- cp += n;\r
- if (cp != erdata) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- if (!haveanswer)\r
- host.h_name = bp;\r
- else if (ap < &host_aliases[MAXALIASES-1])\r
- *ap++ = bp;\r
- else\r
- n = -1;\r
- if (n != -1) {\r
- n = (int)strlen(bp) + 1; /* for the \0 */\r
- if (n >= MAXHOSTNAMELEN) {\r
- had_error++;\r
- break;\r
- }\r
- bp += n;\r
- buflen -= n;\r
- }\r
- break;\r
-#else\r
- host.h_name = bp;\r
- if (_res.options & RES_USE_INET6) {\r
- n = strlen(bp) + 1; /* for the \0 */\r
- if (n >= MAXHOSTNAMELEN) {\r
- had_error++;\r
- break;\r
- }\r
- bp += n;\r
- buflen -= n;\r
- _map_v4v6_hostent(&host, &bp, &buflen);\r
- }\r
- h_errno = NETDB_SUCCESS;\r
- return (&host);\r
-#endif\r
- case T_A:\r
- case T_AAAA:\r
- if (strcasecmp(host.h_name, bp) != 0) {\r
-#ifdef _ORG_FREEBSD_\r
- syslog(LOG_NOTICE|LOG_AUTH,\r
- AskedForGot, host.h_name, bp);\r
-#endif\r
- cp += n;\r
- continue; /* XXX - had_error++ ? */\r
- }\r
- if (n != host.h_length) {\r
- cp += n;\r
- continue;\r
- }\r
- if (!haveanswer) {\r
- register int nn;\r
-\r
- host.h_name = bp;\r
- nn = (int)strlen(bp) + 1; /* for the \0 */\r
- bp += nn;\r
- buflen -= nn;\r
- }\r
-\r
- bp += sizeof(align) - ((size_t)bp % sizeof(align));\r
-\r
- if (bp + n >= &hostbuf[sizeof hostbuf]) {\r
- dprintf("size (%d) too big\n", n);\r
- had_error++;\r
- continue;\r
- }\r
- if (hap >= &h_addr_ptrs[MAXADDRS-1]) {\r
- if (!toobig++)\r
- dprintf("Too many addresses (%d)\n",\r
- MAXADDRS);\r
- cp += n;\r
- continue;\r
- }\r
- *hap++ = bp;\r
- bcopy(cp, bp, n);\r
- bp += n;\r
- buflen -= n;\r
- cp += n;\r
- if (cp != erdata) {\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- }\r
- break;\r
- default:\r
- dprintf("Impossible condition (type=%d)\n", type);\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
- /* BIND has abort() here, too risky on bad data */\r
- }\r
- if (!had_error)\r
- haveanswer++;\r
- }\r
- if (haveanswer) {\r
- *ap = NULL;\r
- *hap = NULL;\r
-# if defined(RESOLVSORT)\r
- /*\r
- * Note: we sort even if host can take only one address\r
- * in its return structures - should give it the "best"\r
- * address in that case, not some random one\r
- */\r
- if (_res.nsort && haveanswer > 1 && qtype == T_A)\r
- addrsort(h_addr_ptrs, haveanswer);\r
-# endif /*RESOLVSORT*/\r
- if (!host.h_name) {\r
- n = (int)strlen(qname) + 1; /* for the \0 */\r
- if (n > buflen || n >= MAXHOSTNAMELEN)\r
- goto no_recovery;\r
- strcpy(bp, qname);\r
- host.h_name = bp;\r
- bp += n;\r
- buflen -= n;\r
- }\r
- if (_res.options & RES_USE_INET6)\r
- _map_v4v6_hostent(&host, &bp, &buflen);\r
- h_errno = NETDB_SUCCESS;\r
- return (&host);\r
- }\r
- no_recovery:\r
- h_errno = NO_RECOVERY;\r
- return (NULL);\r
-}\r
-\r
-struct hostent *\r
-__dns_getanswer(const char *answer, int anslen, const char *qname, int qtype)\r
-{\r
- switch(qtype) {\r
- case T_AAAA:\r
- host.h_addrtype = AF_INET6;\r
- host.h_length = IN6ADDRSZ;\r
- break;\r
- case T_A:\r
- default:\r
- host.h_addrtype = AF_INET;\r
- host.h_length = INADDRSZ;\r
- break;\r
- }\r
-\r
- return(gethostanswer((const querybuf *)answer, anslen, qname, qtype));\r
-}\r
-\r
-struct hostent *\r
-_gethostbydnsname(const char *name, int af)\r
-{\r
- querybuf buf;\r
- register const char *cp;\r
- char *bp;\r
- int n, size, type, len;\r
-\r
- if ((_res.options & RES_INIT) == 0 && res_init() == -1) {\r
- h_errno = NETDB_INTERNAL;\r
- return (NULL);\r
- }\r
-\r
- switch (af) {\r
- case AF_INET:\r
- size = INADDRSZ;\r
- type = T_A;\r
- break;\r
- case AF_INET6:\r
- size = IN6ADDRSZ;\r
- type = T_AAAA;\r
- break;\r
- default:\r
- h_errno = NETDB_INTERNAL;\r
- errno = EAFNOSUPPORT;\r
- return (NULL);\r
- }\r
-\r
- host.h_addrtype = af;\r
- host.h_length = size;\r
-\r
- /*\r
- * if there aren't any dots, it could be a user-level alias.\r
- * this is also done in res_query() since we are not the only\r
- * function that looks up host names.\r
- */\r
- if (!strchr(name, '.') && ( NULL != (cp = __hostalias(name))))\r
- name = cp;\r
-\r
- /*\r
- * disallow names consisting only of digits/dots, unless\r
- * they end in a dot.\r
- */\r
- if (isdigit(name[0]))\r
- for (cp = name;; ++cp) {\r
- if (!*cp) {\r
- if (*--cp == '.')\r
- break;\r
- /*\r
- * All-numeric, no dot at the end.\r
- * Fake up a hostent as if we'd actually\r
- * done a lookup.\r
- */\r
- if (inet_pton(af, name, host_addr) <= 0) {\r
- h_errno = HOST_NOT_FOUND;\r
- return (NULL);\r
- }\r
- strncpy(hostbuf, name, MAXDNAME);\r
- hostbuf[MAXDNAME] = '\0';\r
- bp = hostbuf + MAXDNAME;\r
- len = sizeof hostbuf - MAXDNAME;\r
- host.h_name = hostbuf;\r
- host.h_aliases = host_aliases;\r
- host_aliases[0] = NULL;\r
- h_addr_ptrs[0] = (char *)host_addr;\r
- h_addr_ptrs[1] = NULL;\r
- host.h_addr_list = h_addr_ptrs;\r
- if (_res.options & RES_USE_INET6)\r
- _map_v4v6_hostent(&host, &bp, &len);\r
- h_errno = NETDB_SUCCESS;\r
- return (&host);\r
- }\r
- if (!isdigit(*cp) && *cp != '.') \r
- break;\r
- }\r
- if ((isxdigit(name[0]) && strchr(name, ':') != NULL) ||\r
- name[0] == ':')\r
- for (cp = name;; ++cp) {\r
- if (!*cp) {\r
- if (*--cp == '.')\r
- break;\r
- /*\r
- * All-IPv6-legal, no dot at the end.\r
- * Fake up a hostent as if we'd actually\r
- * done a lookup.\r
- */\r
- if (inet_pton(af, name, host_addr) <= 0) {\r
- h_errno = HOST_NOT_FOUND;\r
- return (NULL);\r
- }\r
- strncpy(hostbuf, name, MAXDNAME);\r
- hostbuf[MAXDNAME] = '\0';\r
- bp = hostbuf + MAXDNAME;\r
- len = sizeof hostbuf - MAXDNAME;\r
- host.h_name = hostbuf;\r
- host.h_aliases = host_aliases;\r
- host_aliases[0] = NULL;\r
- h_addr_ptrs[0] = (char *)host_addr;\r
- h_addr_ptrs[1] = NULL;\r
- host.h_addr_list = h_addr_ptrs;\r
- h_errno = NETDB_SUCCESS;\r
- return (&host);\r
- }\r
- if (!isxdigit(*cp) && *cp != ':' && *cp != '.') \r
- break;\r
- }\r
-\r
- if ((n = res_search(name, C_IN, type, buf.buf, sizeof(buf))) < 0) {\r
- dprintf("res_search failed (%d)\n", n);\r
- return (NULL);\r
- }\r
- return (gethostanswer(&buf, n, name, type));\r
-}\r
-\r
-struct hostent *\r
-_gethostbydnsaddr(const char *addr, int len, int af)\r
-{\r
- const u_char *uaddr = (const u_char *)addr;\r
- static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };\r
- static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };\r
- int n, size;\r
- querybuf buf;\r
- register struct hostent *hp;\r
- char qbuf[MAXDNAME+1], *qp;\r
-#ifdef SUNSECURITY\r
- register struct hostent *rhp;\r
- char **haddr;\r
- u_long old_options;\r
- char hname2[MAXDNAME+1];\r
-#endif /*SUNSECURITY*/\r
- \r
- if ((_res.options & RES_INIT) == 0 && res_init() == -1) {\r
- h_errno = NETDB_INTERNAL;\r
- return (NULL);\r
- }\r
- if (af == AF_INET6 && len == IN6ADDRSZ &&\r
- (!bcmp(uaddr, mapped, sizeof mapped) ||\r
- !bcmp(uaddr, tunnelled, sizeof tunnelled))) {\r
- /* Unmap. */\r
- addr += sizeof mapped;\r
- uaddr += sizeof mapped;\r
- af = AF_INET;\r
- len = INADDRSZ;\r
- }\r
- switch (af) {\r
- case AF_INET:\r
- size = INADDRSZ;\r
- break;\r
- case AF_INET6:\r
- size = IN6ADDRSZ;\r
- break;\r
- default:\r
- errno = EAFNOSUPPORT;\r
- h_errno = NETDB_INTERNAL;\r
- return (NULL);\r
- }\r
- if (size != len) {\r
- errno = EINVAL;\r
- h_errno = NETDB_INTERNAL;\r
- return (NULL);\r
- }\r
- switch (af) {\r
- case AF_INET:\r
- (void) sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",\r
- (uaddr[3] & 0xff),\r
- (uaddr[2] & 0xff),\r
- (uaddr[1] & 0xff),\r
- (uaddr[0] & 0xff));\r
- break;\r
- case AF_INET6:\r
- qp = qbuf;\r
- for (n = IN6ADDRSZ - 1; n >= 0; n--) {\r
- qp += SPRINTF((qp, "%x.%x.",\r
- uaddr[n] & 0xf,\r
- (uaddr[n] >> 4) & 0xf));\r
- }\r
- strcpy(qp, "ip6.int");\r
- break;\r
- default:\r
- abort();\r
- }\r
- n = res_query(qbuf, C_IN, T_PTR, (u_char *)buf.buf, sizeof buf.buf);\r
- if (n < 0) {\r
- dprintf("res_query failed (%d)\n", n);\r
- return (NULL);\r
- }\r
- if ( NULL == (hp = gethostanswer(&buf, n, qbuf, T_PTR)))\r
- return (NULL); /* h_errno was set by gethostanswer() */\r
-#ifdef SUNSECURITY\r
- if (af == AF_INET) {\r
- /*\r
- * turn off search as the name should be absolute,\r
- * 'localhost' should be matched by defnames\r
- */\r
- strncpy(hname2, hp->h_name, MAXDNAME);\r
- hname2[MAXDNAME] = '\0';\r
- old_options = _res.options;\r
- _res.options &= ~RES_DNSRCH;\r
- _res.options |= RES_DEFNAMES;\r
- if (!(rhp = gethostbyname(hname2))) {\r
-#ifdef _ORG_FREEBSD_\r
- syslog(LOG_NOTICE|LOG_AUTH,\r
- "gethostbyaddr: No A record for %s (verifying [%s])",\r
- hname2, inet_ntoa(*((struct in_addr *)addr)));\r
-#endif\r
- _res.options = old_options;\r
- h_errno = HOST_NOT_FOUND;\r
- return (NULL);\r
- }\r
- _res.options = old_options;\r
- for (haddr = rhp->h_addr_list; *haddr; haddr++)\r
- if (!memcmp(*haddr, addr, INADDRSZ))\r
- break;\r
- if (!*haddr) {\r
-#ifdef _ORG_FREEBSD_\r
- syslog(LOG_NOTICE|LOG_AUTH,\r
- "gethostbyaddr: A record of %s != PTR record [%s]",\r
- hname2, inet_ntoa(*((struct in_addr *)addr)));\r
-#endif\r
- h_errno = HOST_NOT_FOUND;\r
- return (NULL);\r
- }\r
- }\r
-#endif /*SUNSECURITY*/\r
- hp->h_addrtype = af;\r
- hp->h_length = len;\r
- bcopy(addr, host_addr, len);\r
- h_addr_ptrs[0] = (char *)host_addr;\r
- h_addr_ptrs[1] = NULL;\r
- if (af == AF_INET && (_res.options & RES_USE_INET6)) {\r
- _map_v4v6_address((char*)host_addr, (char*)host_addr);\r
- hp->h_addrtype = AF_INET6;\r
- hp->h_length = IN6ADDRSZ;\r
- }\r
- h_errno = NETDB_SUCCESS;\r
- return (hp);\r
-}\r
-\r
-#ifdef RESOLVSORT\r
-static void\r
-addrsort(char **ap, int num)\r
-{\r
- short i, j;\r
- char **p;\r
- short aval[MAXADDRS];\r
- short needsort = 0;\r
-\r
- p = ap;\r
- for (i = 0; i < num; i++, p++) {\r
- for (j = 0 ; (unsigned)j < _res.nsort; j++)\r
- if (_res.sort_list[j].addr.s_addr == \r
- (((struct in_addr *)(*p))->s_addr & _res.sort_list[j].mask))\r
- break;\r
- aval[i] = j;\r
- if (needsort == 0 && i > 0 && j < aval[i-1])\r
- needsort = i;\r
- }\r
- if (!needsort)\r
- return;\r
-\r
- while (needsort < num) {\r
- for (j = needsort - 1; j >= 0; j--) {\r
- if (aval[j] > aval[j+1]) {\r
- char *hp;\r
-\r
- i = aval[j];\r
- aval[j] = aval[j+1];\r
- aval[j+1] = i;\r
-\r
- hp = ap[j];\r
- ap[j] = ap[j+1];\r
- ap[j+1] = hp;\r
-\r
- } else\r
- break;\r
- }\r
- needsort++;\r
- }\r
-}\r
-#endif\r
-void\r
-_sethostdnsent(int stayopen)\r
-{\r
- if ((_res.options & RES_INIT) == 0 && res_init() == -1)\r
- return;\r
- if (stayopen)\r
- _res.options |= RES_STAYOPEN | RES_USEVC;\r
-}\r
-\r
-void\r
-_endhostdnsent()\r
-{\r
- _res.options &= ~(RES_STAYOPEN | RES_USEVC);\r
- res_close();\r
-}\r
projects / mirror_edk2.git / blobdiff