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-rw-r--r--nis/nss_nis/nis-hosts.c389
1 files changed, 389 insertions, 0 deletions
diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c
new file mode 100644
index 0000000000..9adce18ca3
--- /dev/null
+++ b/nis/nss_nis/nis-hosts.c
@@ -0,0 +1,389 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <nss.h>
+#include <ctype.h>
+#include <netdb.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+
+/* Get implementation for some internal functions. */
+#include "../../resolv/mapv4v6addr.h"
+#include "../../resolv/mapv4v6hostent.h"
+
+#define ENTNAME hostent
+#define DATABASE "hosts"
+#define NEED_H_ERRNO
+
+#define ENTDATA hostent_data
+struct hostent_data
+ {
+ unsigned char host_addr[16]; /* IPv4 or IPv6 address. */
+ char *h_addr_ptrs[2]; /* Points to that and null terminator. */
+ };
+
+#define TRAILING_LIST_MEMBER h_aliases
+#define TRAILING_LIST_SEPARATOR_P isspace
+#include "../../nss/nss_files/files-parse.c"
+LINE_PARSER
+("#",
+ {
+ char *addr;
+
+ STRING_FIELD (addr, isspace, 1);
+
+ /* Parse address. */
+ if ((_res.options & RES_USE_INET6)
+ && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+ {
+ result->h_addrtype = AF_INET6;
+ result->h_length = IN6ADDRSZ;
+ }
+ else
+ if (inet_pton (AF_INET, addr, entdata->host_addr) > 0)
+ {
+ if (_res.options & RES_USE_INET6)
+ {
+ map_v4v6_address ((char *) entdata->host_addr,
+ (char *) entdata->host_addr);
+ result->h_addrtype = AF_INET6;
+ result->h_length = IN6ADDRSZ;
+ }
+ else
+ {
+ result->h_addrtype = AF_INET;
+ result->h_length = INADDRSZ;
+ }
+ }
+ else
+ /* Illegal address: ignore line. */
+ return 0;
+
+ /* Store a pointer to the address in the expected form. */
+ entdata->h_addr_ptrs[0] = entdata->host_addr;
+ entdata->h_addr_ptrs[1] = NULL;
+ result->h_addr_list = entdata->h_addr_ptrs;
+
+ /* If we need the host entry in IPv6 form change it now. */
+ if (_res.options & RES_USE_INET6)
+ {
+ char *bufptr = data->linebuffer;
+ size_t buflen = (char *) data + datalen - bufptr;
+ map_v4v6_hostent (result, &bufptr, &buflen);
+ }
+
+ STRING_FIELD (result->h_name, isspace, 1);
+ }
+)
+
+__libc_lock_define_initialized (static, lock)
+
+static bool_t new_start = 1;
+static char *oldkey = NULL;
+static int oldkeylen = 0;
+
+enum nss_status
+_nss_nis_sethostent (void)
+{
+ __libc_lock_lock (lock);
+
+ new_start = 1;
+ if (oldkey != NULL)
+ {
+ free (oldkey);
+ oldkey = NULL;
+ oldkeylen = 0;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_endhostent (void)
+{
+ __libc_lock_lock (lock);
+
+ new_start = 1;
+ if (oldkey != NULL)
+ {
+ free (oldkey);
+ oldkey = NULL;
+ oldkeylen = 0;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nis_gethostent_r (struct hostent *host, char *buffer,
+ size_t buflen, int *h_errnop)
+{
+ char *domain;
+ char *result;
+ int len, parse_res;
+ char *outkey;
+ int keylen;
+ struct parser_data *data = (void *) buffer;
+ size_t linebuflen = buffer + buflen - data->linebuffer;
+
+ if (yp_get_default_domain (&domain))
+ return NSS_STATUS_UNAVAIL;
+
+ if (buflen < sizeof *data + 1)
+ {
+ __set_errno (ERANGE);
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ /* Get the next entry until we found a correct one. */
+ do
+ {
+ enum nss_status retval;
+ char *p;
+
+ if (new_start)
+ retval = yperr2nss (yp_first (domain, "hosts.byname",
+ &outkey, &keylen, &result, &len));
+ else
+ retval = yperr2nss ( yp_next (domain, "hosts.byname",
+ oldkey, oldkeylen,
+ &outkey, &keylen, &result, &len));
+
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ switch (retval)
+ {
+ case NSS_STATUS_TRYAGAIN:
+ __set_errno (EAGAIN);
+ *h_errnop = TRY_AGAIN;
+ break;
+ case NSS_STATUS_NOTFOUND:
+ *h_errnop = HOST_NOT_FOUND;
+ break;
+ default:
+ *h_errnop = NO_RECOVERY;
+ break;
+ }
+ return retval;
+ }
+
+ if (len + 1 > linebuflen)
+ {
+ free (result);
+ *h_errnop = NETDB_INTERNAL;
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ p = strncpy (data->linebuffer, result, len);
+ data->linebuffer[len] = '\0';
+ while (isspace (*p))
+ ++p;
+ free (result);
+
+ parse_res = parse_line (p, host, data, buflen);
+ if (!parse_res && errno == ERANGE)
+ {
+ *h_errnop = NETDB_INTERNAL;;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ free (oldkey);
+ oldkey = outkey;
+ oldkeylen = keylen;
+ new_start = 0;
+ }
+ while (!parse_res);
+
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+}
+
+int
+_nss_nis_gethostent_r (struct hostent *host, char *buffer, size_t buflen,
+ int *h_errnop)
+{
+ int status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_nis_gethostent_r (host, buffer, buflen, h_errnop);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nis_gethostbyname_r (const char *name, struct hostent *host,
+ char *buffer, size_t buflen, int *h_errnop)
+{
+ enum nss_status retval;
+ char *domain, *result, *p;
+ int len, parse_res;
+ struct parser_data *data = (void *) buffer;
+ size_t linebuflen = buffer + buflen - data->linebuffer;
+
+ if (name == NULL)
+ {
+ __set_errno (EINVAL);
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ if (yp_get_default_domain (&domain))
+ return NSS_STATUS_UNAVAIL;
+
+ if (buflen < sizeof *data + 1)
+ {
+ *h_errnop = NETDB_INTERNAL;
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+ retval = yperr2nss (yp_match (domain, "hosts.byname", name,
+ strlen (name), &result, &len));
+
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *h_errnop = TRY_AGAIN;
+ __set_errno (EAGAIN);
+ }
+ if (retval == NSS_STATUS_NOTFOUND)
+ *h_errnop = HOST_NOT_FOUND;
+ return retval;
+ }
+
+ if (len + 1 > linebuflen)
+ {
+ free (result);
+ *h_errnop = NETDB_INTERNAL;
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ p = strncpy (data->linebuffer, result, len);
+ data->linebuffer[len] = '\0';
+ while (isspace (*p))
+ ++p;
+ free (result);
+
+ parse_res = parse_line (p, host, data, buflen);
+
+ if (!parse_res)
+ {
+ if (errno == ERANGE)
+ {
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ {
+ *h_errnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
+ }
+ }
+
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_gethostbyaddr_r (char *addr, int addrlen, int type,
+ struct hostent *host, char *buffer, size_t buflen,
+ int *h_errnop)
+{
+ enum nss_status retval;
+ char *domain, *result, *p;
+ int len, parse_res;
+ char *buf;
+ struct parser_data *data = (void *) buffer;
+ size_t linebuflen = buffer + buflen - data->linebuffer;
+
+ if (yp_get_default_domain (&domain))
+ return NSS_STATUS_UNAVAIL;
+
+ if (buflen < sizeof *data + 1)
+ {
+ __set_errno (ERANGE);
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ buf = inet_ntoa (*(struct in_addr *) addr);
+
+ retval = yperr2nss (yp_match (domain, "hosts.byaddr", buf,
+ strlen (buf), &result, &len));
+
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *h_errnop = TRY_AGAIN;
+ __set_errno (EAGAIN);
+ }
+ if (retval == NSS_STATUS_NOTFOUND)
+ *h_errnop = HOST_NOT_FOUND;
+ return retval;
+ }
+
+ if (len + 1 > linebuflen)
+ {
+ free (result);
+ __set_errno (ERANGE);
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ p = strncpy (data->linebuffer, result, len);
+ data->linebuffer[len] = '\0';
+ while (isspace (*p))
+ ++p;
+ free (result);
+
+ parse_res = parse_line (p, host, data, buflen);
+
+ if (!parse_res)
+ {
+ if (errno == ERANGE)
+ {
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ {
+ *h_errnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
+ }
+ }
+
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+}
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