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Diffstat (limited to 'contrib/bind/lib/irs/dns_nw.c')
-rw-r--r--contrib/bind/lib/irs/dns_nw.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/contrib/bind/lib/irs/dns_nw.c b/contrib/bind/lib/irs/dns_nw.c
deleted file mode 100644
index 66ef66489444..000000000000
--- a/contrib/bind/lib/irs/dns_nw.c
+++ /dev/null
@@ -1,560 +0,0 @@
-/*
- * 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 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: dns_nw.c,v 1.19 1999/10/15 19:49:10 vixie Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-/* Imports. */
-
-#include "port_before.h"
-
-#include <sys/param.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <arpa/nameser.h>
-
-#include <ctype.h>
-#include <errno.h>
-#include <netdb.h>
-#include <resolv.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <isc/memcluster.h>
-#include <irs.h>
-
-#include "port_after.h"
-
-#include "irs_p.h"
-#include "dns_p.h"
-
-#ifdef SPRINTF_CHAR
-# define SPRINTF(x) strlen(sprintf/**/x)
-#else
-# define SPRINTF(x) sprintf x
-#endif
-
-/* Definitions. */
-
-#define MAXALIASES 35
-
-#if PACKETSZ > 1024
-#define MAXPACKET PACKETSZ
-#else
-#define MAXPACKET 1024
-#endif
-
-struct pvt {
- struct nwent net;
- char * ali[MAXALIASES];
- char buf[BUFSIZ+1];
- struct __res_state * res;
- void (*free_res)(void *);
-};
-
-typedef union {
- long al;
- char ac;
-} align;
-
-enum by_what { by_addr, by_name };
-
-/* Forwards. */
-
-static void nw_close(struct irs_nw *);
-static struct nwent * nw_byname(struct irs_nw *, const char *, int);
-static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
-static struct nwent * nw_next(struct irs_nw *);
-static void nw_rewind(struct irs_nw *);
-static void nw_minimize(struct irs_nw *);
-static struct __res_state * nw_res_get(struct irs_nw *this);
-static void nw_res_set(struct irs_nw *this,
- struct __res_state *res,
- void (*free_res)(void *));
-
-static struct nwent * get1101byaddr(struct irs_nw *, u_char *, int);
-static struct nwent * get1101byname(struct irs_nw *, const char *);
-static struct nwent * get1101answer(struct irs_nw *,
- u_char *ansbuf, int anslen,
- enum by_what by_what,
- int af, const char *name,
- const u_char *addr, int addrlen);
-static struct nwent * get1101mask(struct irs_nw *this, struct nwent *);
-static int make1101inaddr(const u_char *, int, char *, int);
-static void normalize_name(char *name);
-static int init(struct irs_nw *this);
-
-/* Exports. */
-
-struct irs_nw *
-irs_dns_nw(struct irs_acc *this) {
- struct irs_nw *nw;
- struct pvt *pvt;
-
- if (!(pvt = memget(sizeof *pvt))) {
- errno = ENOMEM;
- return (NULL);
- }
- memset(pvt, 0, sizeof *pvt);
- if (!(nw = memget(sizeof *nw))) {
- memput(pvt, sizeof *pvt);
- errno = ENOMEM;
- return (NULL);
- }
- memset(nw, 0x5e, sizeof *nw);
- nw->private = pvt;
- nw->close = nw_close;
- nw->byname = nw_byname;
- nw->byaddr = nw_byaddr;
- nw->next = nw_next;
- nw->rewind = nw_rewind;
- nw->minimize = nw_minimize;
- nw->res_get = nw_res_get;
- nw->res_set = nw_res_set;
- return (nw);
-}
-
-/* Methods. */
-
-static void
-nw_close(struct irs_nw *this) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- nw_minimize(this);
-
- if (pvt->res && pvt->free_res)
- (*pvt->free_res)(pvt->res);
-
- memput(pvt, sizeof *pvt);
- memput(this, sizeof *this);
-}
-
-static struct nwent *
-nw_byname(struct irs_nw *this, const char *name, int af) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (init(this) == -1)
- return (NULL);
-
- switch (af) {
- case AF_INET:
- return (get1101byname(this, name));
- default:
- (void)NULL;
- }
- RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
- errno = EAFNOSUPPORT;
- return (NULL);
-}
-
-static struct nwent *
-nw_byaddr(struct irs_nw *this, void *net, int len, int af) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (init(this) == -1)
- return (NULL);
-
- switch (af) {
- case AF_INET:
- return (get1101byaddr(this, net, len));
- default:
- (void)NULL;
- }
- RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
- errno = EAFNOSUPPORT;
- return (NULL);
-}
-
-static struct nwent *
-nw_next(struct irs_nw *this) {
- return (NULL);
-}
-
-static void
-nw_rewind(struct irs_nw *this) {
- /* NOOP */
-}
-
-static void
-nw_minimize(struct irs_nw *this) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (pvt->res)
- res_nclose(pvt->res);
-}
-
-static struct __res_state *
-nw_res_get(struct irs_nw *this) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (!pvt->res) {
- struct __res_state *res;
- res = (struct __res_state *)malloc(sizeof *res);
- if (!res) {
- errno = ENOMEM;
- return (NULL);
- }
- memset(res, 0, sizeof *res);
- nw_res_set(this, res, free);
- }
-
- return (pvt->res);
-}
-
-static void
-nw_res_set(struct irs_nw *this, struct __res_state *res,
- void (*free_res)(void *)) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (pvt->res && pvt->free_res) {
- res_nclose(pvt->res);
- (*pvt->free_res)(pvt->res);
- }
-
- pvt->res = res;
- pvt->free_res = free_res;
-}
-
-/* Private. */
-
-static struct nwent *
-get1101byname(struct irs_nw *this, const char *name) {
- struct pvt *pvt = (struct pvt *)this->private;
- u_char ansbuf[MAXPACKET];
- int anslen;
-
- anslen = res_nsearch(pvt->res, name, C_IN, T_PTR,
- ansbuf, sizeof ansbuf);
- if (anslen < 0)
- return (NULL);
- return (get1101mask(this, get1101answer(this, ansbuf, anslen, by_name,
- AF_INET, name, NULL, 0)));
-}
-
-static struct nwent *
-get1101byaddr(struct irs_nw *this, u_char *net, int len) {
- struct pvt *pvt = (struct pvt *)this->private;
- char qbuf[sizeof "255.255.255.255.in-addr.arpa"];
- u_char ansbuf[MAXPACKET];
- int anslen;
-
- if (len < 1 || len > 32) {
- errno = EINVAL;
- RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
- return (NULL);
- }
- if (make1101inaddr(net, len, qbuf, sizeof qbuf) < 0)
- return (NULL);
- anslen = res_nquery(pvt->res, qbuf, C_IN, T_PTR,
- ansbuf, sizeof ansbuf);
- if (anslen < 0)
- return (NULL);
- return (get1101mask(this, get1101answer(this, ansbuf, anslen, by_addr,
- AF_INET, NULL, net, len)));
-}
-
-static struct nwent *
-get1101answer(struct irs_nw *this,
- u_char *ansbuf, int anslen, enum by_what by_what,
- int af, const char *name, const u_char *addr, int addrlen)
-{
- struct pvt *pvt = (struct pvt *)this->private;
- int type, class, buflen, ancount, qdcount, haveanswer;
- char *bp, **ap;
- u_char *cp, *eom;
- HEADER *hp;
-
- /* Initialize, and parse header. */
- eom = ansbuf + anslen;
- if (ansbuf + HFIXEDSZ > eom) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- hp = (HEADER *)ansbuf;
- cp = ansbuf + HFIXEDSZ;
- qdcount = ntohs(hp->qdcount);
- while (qdcount-- > 0) {
- int n = dn_skipname(cp, eom);
- cp += n + QFIXEDSZ;
- if (n < 0 || cp > eom) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- }
- ancount = ntohs(hp->ancount);
- if (!ancount) {
- if (hp->aa)
- RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
- else
- RES_SET_H_ERRNO(pvt->res, TRY_AGAIN);
- return (NULL);
- }
-
- /* Prepare a return structure. */
- bp = pvt->buf;
- buflen = sizeof pvt->buf;
- pvt->net.n_name = NULL;
- pvt->net.n_aliases = pvt->ali;
- pvt->net.n_addrtype = af;
- pvt->net.n_addr = NULL;
- pvt->net.n_length = addrlen;
-
- /* Save input key if given. */
- switch (by_what) {
- case by_name:
- if (name != NULL) {
- int n = strlen(name) + 1;
-
- if (n > buflen) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- pvt->net.n_name = strcpy(bp, name);
- bp += n;
- buflen -= n;
- }
- break;
- case by_addr:
- if (addr != NULL && addrlen != 0) {
- int n = addrlen / 8 + ((addrlen % 8) != 0);
-
- if (INADDRSZ > buflen) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- memset(bp, 0, INADDRSZ);
- memcpy(bp, addr, n);
- pvt->net.n_addr = bp;
- bp += INADDRSZ;
- buflen -= INADDRSZ;
- }
- break;
- default:
- abort();
- }
-
- /* Parse the answer, collect aliases. */
- ap = pvt->ali;
- haveanswer = 0;
- while (--ancount >= 0 && cp < eom) {
- int n = dn_expand(ansbuf, eom, cp, bp, buflen);
-
- cp += n; /* Owner */
- if (n < 0 || !maybe_dnok(pvt->res, bp) ||
- cp + 3 * INT16SZ + INT32SZ > eom) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- GETSHORT(type, cp); /* Type */
- GETSHORT(class, cp); /* Class */
- cp += INT32SZ; /* TTL */
- GETSHORT(n, cp); /* RDLENGTH */
- if (class == C_IN && type == T_PTR) {
- int nn;
-
- nn = dn_expand(ansbuf, eom, cp, bp, buflen);
- if (nn < 0 || !maybe_hnok(pvt->res, bp) || nn != n) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- normalize_name(bp);
- switch (by_what) {
- case by_addr: {
- if (pvt->net.n_name == NULL)
- pvt->net.n_name = bp;
- else if (ns_samename(pvt->net.n_name, bp) == 1)
- break;
- else
- *ap++ = bp;
- nn = strlen(bp) + 1;
- bp += nn;
- buflen -= nn;
- haveanswer++;
- break;
- }
- case by_name: {
- u_int b1, b2, b3, b4;
-
- if (pvt->net.n_addr != NULL ||
- sscanf(bp, "%u.%u.%u.%u.in-addr.arpa",
- &b1, &b2, &b3, &b4) != 4)
- break;
- if (buflen < INADDRSZ) {
- RES_SET_H_ERRNO(pvt->res, NO_RECOVERY);
- return (NULL);
- }
- pvt->net.n_addr = bp;
- *bp++ = b4;
- *bp++ = b3;
- *bp++ = b2;
- *bp++ = b1;
- buflen -= INADDRSZ;
- pvt->net.n_length = INADDRSZ * 8;
- haveanswer++;
- }
- }
- }
- cp += n; /* RDATA */
- }
- if (!haveanswer) {
- RES_SET_H_ERRNO(pvt->res, TRY_AGAIN);
- return (NULL);
- }
- *ap = NULL;
-
- return (&pvt->net);
-}
-
-static struct nwent *
-get1101mask(struct irs_nw *this, struct nwent *nwent) {
- struct pvt *pvt = (struct pvt *)this->private;
- char qbuf[sizeof "255.255.255.255.in-addr.arpa"], owner[MAXDNAME];
- int anslen, type, class, ancount, qdcount;
- u_char ansbuf[MAXPACKET], *cp, *eom;
- HEADER *hp;
-
- if (!nwent)
- return (NULL);
- if (make1101inaddr(nwent->n_addr, nwent->n_length, qbuf, sizeof qbuf)
- < 0) {
- /* "First, do no harm." */
- return (nwent);
- }
-
- /* Query for the A RR that would hold this network's mask. */
- anslen = res_nquery(pvt->res, qbuf, C_IN, T_A, ansbuf, sizeof ansbuf);
- if (anslen < HFIXEDSZ)
- return (nwent);
-
- /* Initialize, and parse header. */
- hp = (HEADER *)ansbuf;
- cp = ansbuf + HFIXEDSZ;
- eom = ansbuf + anslen;
- qdcount = ntohs(hp->qdcount);
- while (qdcount-- > 0) {
- int n = dn_skipname(cp, eom);
- cp += n + QFIXEDSZ;
- if (n < 0 || cp > eom)
- return (nwent);
- }
- ancount = ntohs(hp->ancount);
-
- /* Parse the answer, collect aliases. */
- while (--ancount >= 0 && cp < eom) {
- int n = dn_expand(ansbuf, eom, cp, owner, sizeof owner);
-
- if (n < 0 || !maybe_dnok(pvt->res, owner))
- break;
- cp += n; /* Owner */
- if (cp + 3 * INT16SZ + INT32SZ > eom)
- break;
- GETSHORT(type, cp); /* Type */
- GETSHORT(class, cp); /* Class */
- cp += INT32SZ; /* TTL */
- GETSHORT(n, cp); /* RDLENGTH */
- if (cp + n > eom)
- break;
- if (n == INADDRSZ && class == C_IN && type == T_A &&
- ns_samename(qbuf, owner) == 1) {
- /* This A RR indicates the actual netmask. */
- int nn, mm;
-
- nwent->n_length = 0;
- for (nn = 0; nn < INADDRSZ; nn++)
- for (mm = 7; mm >= 0; mm--)
- if (cp[nn] & (1 << mm))
- nwent->n_length++;
- else
- break;
- }
- cp += n; /* RDATA */
- }
- return (nwent);
-}
-
-static int
-make1101inaddr(const u_char *net, int bits, char *name, int size) {
- int n, m;
-
- /* Zero fill any whole bytes left out of the prefix. */
- for (n = (32 - bits) / 8; n > 0; n--) {
- if (size < (int)(sizeof "0."))
- goto emsgsize;
- m = SPRINTF((name, "0."));
- name += m;
- size -= m;
- }
-
- /* Format the partial byte, if any, within the prefix. */
- if ((n = bits % 8) != 0) {
- if (size < (int)(sizeof "255."))
- goto emsgsize;
- m = SPRINTF((name, "%u.",
- net[bits / 8] & ~((1 << (8 - n)) - 1)));
- name += m;
- size -= m;
- }
-
- /* Format the whole bytes within the prefix. */
- for (n = bits / 8; n > 0; n--) {
- if (size < (int)(sizeof "255."))
- goto emsgsize;
- m = SPRINTF((name, "%u.", net[n - 1]));
- name += m;
- size -= m;
- }
-
- /* Add the static text. */
- if (size < (int)(sizeof "in-addr.arpa"))
- goto emsgsize;
- (void) SPRINTF((name, "in-addr.arpa"));
- return (0);
-
- emsgsize:
- errno = EMSGSIZE;
- return (-1);
-}
-
-static void
-normalize_name(char *name) {
- char *t;
-
- /* Make lower case. */
- for (t = name; *t; t++)
- if (isascii(*t) && isupper(*t))
- *t = tolower(*t);
-
- /* Remove trailing dots. */
- while (t > name && t[-1] == '.')
- *--t = '\0';
-}
-
-static int
-init(struct irs_nw *this) {
- struct pvt *pvt = (struct pvt *)this->private;
-
- if (!pvt->res && !nw_res_get(this))
- return (-1);
- if (((pvt->res->options & RES_INIT) == 0) &&
- res_ninit(pvt->res) == -1)
- return (-1);
- return (0);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-23 16:39:23 +0000