diff options
Diffstat (limited to 'REORG.TODO/nis/nss_nis/nis-network.c')
| -rw-r--r-- | REORG.TODO/nis/nss_nis/nis-network.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nis/nis-network.c b/REORG.TODO/nis/nss_nis/nis-network.c new file mode 100644 index 0000000000..baf0ce4b8a --- /dev/null +++ b/REORG.TODO/nis/nss_nis/nis-network.c @@ -0,0 +1,315 @@ +/* Copyright (C) 1996-2017 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 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 + <http://www.gnu.org/licenses/>. */ + +#include <nss.h> +/* The following is an ugly trick to avoid a prototype declaration for + _nss_nis_endgrent. */ +#define _nss_nis_endnetent _nss_nis_endnetent_XXX +#include <netdb.h> +#undef _nss_nis_endnetent +#include <ctype.h> +#include <errno.h> +#include <stdint.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" + +/* Get the declaration of the parser function. */ +#define ENTNAME netent +#define EXTERN_PARSER +#include <nss/nss_files/files-parse.c> + +__libc_lock_define_initialized (static, lock) + +static bool_t new_start = 1; +static char *oldkey; +static int oldkeylen; + +enum nss_status +_nss_nis_setnetent (int stayopen) +{ + __libc_lock_lock (lock); + + new_start = 1; + if (oldkey != NULL) + { + free (oldkey); + oldkey = NULL; + oldkeylen = 0; + } + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} +/* Make _nss_nis_endnetent an alias of _nss_nis_setnetent. We do this + even though the prototypes don't match. The argument of setnetent + is not used so this makes no difference. */ +strong_alias (_nss_nis_setnetent, _nss_nis_endnetent) + +static enum nss_status +internal_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen, + int *errnop, int *herrnop) +{ + struct parser_data *data = (void *) buffer; + + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + /* Get the next entry until we found a correct one. */ + int parse_res; + do + { + char *result; + char *outkey; + int len; + int keylen; + int yperr; + + if (new_start) + yperr = yp_first (domain, "networks.byname", &outkey, &keylen, &result, + &len); + else + yperr = yp_next (domain, "networks.byname", oldkey, oldkeylen, &outkey, + &keylen, &result, &len); + + if (__glibc_unlikely (yperr != YPERR_SUCCESS)) + { + enum nss_status retval = yperr2nss (yperr); + + if (retval == NSS_STATUS_TRYAGAIN) + { + *herrnop = NETDB_INTERNAL; + *errnop = errno; + } + return retval; + } + + if (__glibc_unlikely ((size_t) (len + 1) > buflen)) + { + free (result); + *errnop = ERANGE; + *herrnop = NETDB_INTERNAL; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + parse_res = _nss_files_parse_netent (p, net, data, buflen, errnop); + if (__glibc_unlikely (parse_res == -1)) + { + free (outkey); + *herrnop = NETDB_INTERNAL; + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + free (oldkey); + oldkey = outkey; + oldkeylen = keylen; + new_start = 0; + } + while (!parse_res); + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nis_getnetent_r (struct netent *net, char *buffer, size_t buflen, + int *errnop, int *herrnop) +{ + enum nss_status status; + + __libc_lock_lock (lock); + + status = internal_nis_getnetent_r (net, buffer, buflen, errnop, herrnop); + + __libc_lock_unlock (lock); + + return status; +} + +enum nss_status +_nss_nis_getnetbyname_r (const char *name, struct netent *net, char *buffer, + size_t buflen, int *errnop, int *herrnop) +{ + if (name == NULL) + { + *errnop = EINVAL; + *herrnop = NETDB_INTERNAL; + return NSS_STATUS_UNAVAIL; + } + + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + struct parser_data *data = (void *) buffer; + if (buflen < sizeof *data + 1) + { + *herrnop = NETDB_INTERNAL; + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + /* 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, "networks.byname", name2, namlen, &result, + &len); + + if (__glibc_unlikely (yperr != YPERR_SUCCESS)) + { + enum nss_status retval = yperr2nss (yperr); + + if (retval == NSS_STATUS_TRYAGAIN) + { + *errnop = errno; + *herrnop = NETDB_INTERNAL; + } + return retval; + } + + if (__glibc_unlikely ((size_t) (len + 1) > buflen)) + { + free (result); + *errnop = ERANGE; + *herrnop = NETDB_INTERNAL; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + int parse_res = _nss_files_parse_netent (p, net, data, buflen, errnop); + + if (__glibc_unlikely (parse_res < 1)) + { + *herrnop = NETDB_INTERNAL; + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; + } + else + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nis_getnetbyaddr_r (uint32_t addr, int type, struct netent *net, + char *buffer, size_t buflen, int *errnop, + int *herrnop) +{ + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + struct in_addr in = { .s_addr = htonl (addr) }; + char *buf = inet_ntoa (in); + size_t blen = strlen (buf); + + while (1) + { + char *result; + int len; + + int yperr = yp_match (domain, "networks.byaddr", buf, blen, &result, + &len); + + if (__glibc_unlikely (yperr != YPERR_SUCCESS)) + { + enum nss_status retval = yperr2nss (yperr); + + if (retval == NSS_STATUS_NOTFOUND) + { + if (buf[blen - 2] == '.' && buf[blen - 1] == '0') + { + /* Try again, but with trailing dot(s) + removed (one by one) */ + buf[blen - 2] = '\0'; + blen -= 2; + continue; + } + else + return NSS_STATUS_NOTFOUND; + } + else + { + if (retval == NSS_STATUS_TRYAGAIN) + *errnop = errno; + return retval; + } + } + + if (__glibc_unlikely ((size_t) (len + 1) > buflen)) + { + free (result); + *errnop = ERANGE; + *herrnop = NETDB_INTERNAL; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + int parse_res = _nss_files_parse_netent (p, net, (void *) buffer, + buflen, errnop); + + if (__glibc_unlikely (parse_res < 1)) + { + *herrnop = NETDB_INTERNAL; + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; + } + else + return NSS_STATUS_SUCCESS; + } +} |