diff options
Diffstat (limited to 'nis/nss_nis/nis-hosts.c')
| -rw-r--r-- | nis/nss_nis/nis-hosts.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c deleted file mode 100644 index eb074783f7..0000000000 --- a/nis/nss_nis/nis-hosts.c +++ /dev/null @@ -1,535 +0,0 @@ -/* Copyright (C) 1996-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <nss.h> -#include <ctype.h> -#include <netdb.h> -#include <string.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <libc-lock.h> -#include <rpcsvc/yp.h> -#include <rpcsvc/ypclnt.h> - -#include "nss-nis.h" - -#define ENTNAME hostent -#define DATABASE "hosts" -#define NEED_H_ERRNO - -#define EXTRA_ARGS , af -#define EXTRA_ARGS_DECL , int af - -#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); - - assert (af == AF_INET || af == AF_INET6 || af == AF_UNSPEC); - - /* Parse address. */ - if (af != AF_INET6 && inet_pton (AF_INET, addr, entdata->host_addr) > 0) - { - result->h_addrtype = AF_INET; - result->h_length = INADDRSZ; - } - else if (af != AF_INET - && inet_pton (AF_INET6, addr, entdata->host_addr) > 0) - { - result->h_addrtype = AF_INET6; - result->h_length = IN6ADDRSZ; - } - else - /* Illegal address: ignore line. */ - return 0; - - /* Store a pointer to the address in the expected form. */ - entdata->h_addr_ptrs[0] = (char *) entdata->host_addr; - entdata->h_addr_ptrs[1] = NULL; - result->h_addr_list = entdata->h_addr_ptrs; - - 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 (int stayopen) -{ - return _nss_nis_endhostent (); -} - -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; -} -libnss_nis_hidden_def (_nss_nis_endhostent) - -/* The calling function always need to get a lock first. */ -static enum nss_status -internal_nis_gethostent_r (struct hostent *host, char *buffer, - size_t buflen, int *errnop, int *h_errnop, - int af) -{ - char *domain; - if (__glibc_unlikely (yp_get_default_domain (&domain))) - return NSS_STATUS_UNAVAIL; - - uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); - buffer += pad; - - struct parser_data *data = (void *) buffer; - if (__glibc_unlikely (buflen < sizeof *data + 1 + pad)) - { - *errnop = ERANGE; - *h_errnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - buflen -= pad; - - /* Get the next entry until we found a correct one. */ - const size_t linebuflen = buffer + buflen - data->linebuffer; - int parse_res; - do - { - char *result; - int len; - char *outkey; - int keylen; - int yperr; - if (new_start) - yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result, - &len); - else - yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey, - &keylen, &result, &len); - - if (__glibc_unlikely (yperr != YPERR_SUCCESS)) - { - enum nss_status retval = yperr2nss (yperr); - - switch (retval) - { - case NSS_STATUS_TRYAGAIN: - *errnop = errno; - *h_errnop = TRY_AGAIN; - break; - case NSS_STATUS_NOTFOUND: - *h_errnop = HOST_NOT_FOUND; - break; - default: - *h_errnop = NO_RECOVERY; - break; - } - return retval; - } - - if (__glibc_unlikely ((size_t) (len + 1) > linebuflen)) - { - free (result); - *h_errnop = NETDB_INTERNAL; - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - - char *p = strncpy (data->linebuffer, result, len); - data->linebuffer[len] = '\0'; - while (isspace (*p)) - ++p; - free (result); - - parse_res = parse_line (p, host, data, buflen, errnop, af); - if (__glibc_unlikely (parse_res == -1)) - { - free (outkey); - *h_errnop = NETDB_INTERNAL; - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - free (oldkey); - oldkey = outkey; - oldkeylen = keylen; - new_start = 0; - } - while (!parse_res); - - *h_errnop = NETDB_SUCCESS; - return NSS_STATUS_SUCCESS; -} - - -enum nss_status -_nss_nis_gethostent_r (struct hostent *host, char *buffer, size_t buflen, - int *errnop, int *h_errnop) -{ - enum nss_status status; - - __libc_lock_lock (lock); - - status = internal_nis_gethostent_r (host, buffer, buflen, errnop, h_errnop, - AF_INET); - - __libc_lock_unlock (lock); - - return status; -} - - -static enum nss_status -internal_gethostbyname2_r (const char *name, int af, struct hostent *host, - char *buffer, size_t buflen, int *errnop, - int *h_errnop) -{ - uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); - buffer += pad; - - struct parser_data *data = (void *) buffer; - - if (name == NULL) - { - *errnop = EINVAL; - return NSS_STATUS_UNAVAIL; - } - - char *domain; - if (yp_get_default_domain (&domain)) - return NSS_STATUS_UNAVAIL; - - if (buflen < sizeof *data + 1 + pad) - { - *h_errnop = NETDB_INTERNAL; - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - buflen -= pad; - - /* Convert name to lowercase. */ - size_t namlen = strlen (name); - /* Limit name length to the maximum size of an RPC packet. */ - if (namlen > UDPMSGSIZE) - { - *errnop = ERANGE; - return NSS_STATUS_UNAVAIL; - } - - char name2[namlen + 1]; - size_t i; - - for (i = 0; i < namlen; ++i) - name2[i] = tolower (name[i]); - name2[i] = '\0'; - - char *result; - int len; - int yperr = yp_match (domain, "hosts.byname", name2, namlen, &result, &len); - - if (__glibc_unlikely (yperr != YPERR_SUCCESS)) - { - enum nss_status retval = yperr2nss (yperr); - - if (retval == NSS_STATUS_TRYAGAIN) - { - *h_errnop = TRY_AGAIN; - *errnop = errno; - } - if (retval == NSS_STATUS_NOTFOUND) - *h_errnop = HOST_NOT_FOUND; - return retval; - } - - const size_t linebuflen = buffer + buflen - data->linebuffer; - if (__glibc_unlikely ((size_t) (len + 1) > linebuflen)) - { - free (result); - *h_errnop = NETDB_INTERNAL; - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - - char *p = strncpy (data->linebuffer, result, len); - data->linebuffer[len] = '\0'; - while (isspace (*p)) - ++p; - free (result); - - int parse_res = parse_line (p, host, data, buflen, errnop, af); - - if (__glibc_unlikely (parse_res < 1 || host->h_addrtype != af)) - { - if (parse_res == -1) - { - *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_gethostbyname2_r (const char *name, int af, struct hostent *host, - char *buffer, size_t buflen, int *errnop, - int *h_errnop) -{ - if (af != AF_INET && af != AF_INET6) - { - *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - - return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop, - h_errnop); -} - - -enum nss_status -_nss_nis_gethostbyname_r (const char *name, struct hostent *host, char *buffer, - size_t buflen, int *errnop, int *h_errnop) -{ - return internal_gethostbyname2_r (name, AF_INET, host, buffer, buflen, - errnop, h_errnop); -} - - -enum nss_status -_nss_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af, - struct hostent *host, char *buffer, size_t buflen, - int *errnop, int *h_errnop) -{ - char *domain; - if (__glibc_unlikely (yp_get_default_domain (&domain))) - return NSS_STATUS_UNAVAIL; - - uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); - buffer += pad; - - struct parser_data *data = (void *) buffer; - if (__glibc_unlikely (buflen < sizeof *data + 1 + pad)) - { - *errnop = ERANGE; - *h_errnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - buflen -= pad; - - char *buf = inet_ntoa (*(const struct in_addr *) addr); - - char *result; - int len; - int yperr = yp_match (domain, "hosts.byaddr", buf, strlen (buf), &result, - &len); - - if (__glibc_unlikely (yperr != YPERR_SUCCESS)) - { - enum nss_status retval = yperr2nss (yperr); - - if (retval == NSS_STATUS_TRYAGAIN) - { - *h_errnop = TRY_AGAIN; - *errnop = errno; - } - else if (retval == NSS_STATUS_NOTFOUND) - *h_errnop = HOST_NOT_FOUND; - - return retval; - } - - const size_t linebuflen = buffer + buflen - data->linebuffer; - if (__glibc_unlikely ((size_t) (len + 1) > linebuflen)) - { - free (result); - *errnop = ERANGE; - *h_errnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - - char *p = strncpy (data->linebuffer, result, len); - data->linebuffer[len] = '\0'; - while (isspace (*p)) - ++p; - free (result); - - int parse_res = parse_line (p, host, data, buflen, errnop, af); - if (__glibc_unlikely (parse_res < 1)) - { - if (parse_res == -1) - { - *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_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat, - char *buffer, size_t buflen, int *errnop, - int *herrnop, int32_t *ttlp) -{ - char *domain; - if (yp_get_default_domain (&domain)) - { - *herrnop = NO_DATA; - return NSS_STATUS_UNAVAIL; - } - - /* Convert name to lowercase. */ - size_t namlen = strlen (name); - /* Limit name length to the maximum size of an RPC packet. */ - if (namlen > UDPMSGSIZE) - { - *errnop = ERANGE; - return NSS_STATUS_UNAVAIL; - } - - char name2[namlen + 1]; - size_t i; - - for (i = 0; i < namlen; ++i) - name2[i] = tolower (name[i]); - name2[i] = '\0'; - - char *result; - int len; - int yperr = yp_match (domain, "hosts.byname", name2, namlen, &result, &len); - - if (__glibc_unlikely (yperr != YPERR_SUCCESS)) - { - enum nss_status retval = yperr2nss (yperr); - - if (retval == NSS_STATUS_TRYAGAIN) - { - *herrnop = TRY_AGAIN; - *errnop = errno; - } - if (retval == NSS_STATUS_NOTFOUND) - *herrnop = HOST_NOT_FOUND; - return retval; - } - - if (*pat == NULL) - { - uintptr_t pad = (-(uintptr_t) buffer - % __alignof__ (struct gaih_addrtuple)); - buffer += pad; - buflen = buflen > pad ? buflen - pad : 0; - - if (__glibc_unlikely (buflen < sizeof (struct gaih_addrtuple))) - { - erange: - free (result); - *errnop = ERANGE; - *herrnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - - *pat = (struct gaih_addrtuple *) buffer; - buffer += sizeof (struct gaih_addrtuple); - buflen -= sizeof (struct gaih_addrtuple); - } - - uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); - buffer += pad; - - struct parser_data *data = (void *) buffer; - - if (__glibc_unlikely (buflen < sizeof *data + 1 + pad)) - goto erange; - buflen -= pad; - - struct hostent host; - int parse_res = parse_line (result, &host, data, buflen, errnop, AF_UNSPEC); - if (__glibc_unlikely (parse_res < 1)) - { - if (parse_res == -1) - { - *herrnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - else - { - *herrnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - } - - (*pat)->next = NULL; - (*pat)->family = host.h_addrtype; - memcpy ((*pat)->addr, host.h_addr_list[0], host.h_length); - (*pat)->scopeid = 0; - assert (host.h_addr_list[1] == NULL); - - /* Undo the alignment for parser_data. */ - buffer -= pad; - buflen += pad; - - size_t h_name_len = strlen (host.h_name) + 1; - if (h_name_len >= buflen) - goto erange; - (*pat)->name = memcpy (buffer, host.h_name, h_name_len); - - free (result); - - return NSS_STATUS_SUCCESS; -} |