diff options
Diffstat (limited to 'nss')
| -rw-r--r-- | nss/digits_dots.c | 273 | ||||
| -rw-r--r-- | nss/getXXbyYY.c | 12 | ||||
| -rw-r--r-- | nss/getXXbyYY_r.c | 9 |
3 files changed, 292 insertions, 2 deletions
diff --git a/nss/digits_dots.c b/nss/digits_dots.c new file mode 100644 index 0000000000..b86f66cf4d --- /dev/null +++ b/nss/digits_dots.c @@ -0,0 +1,273 @@ +/* Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997. + + 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. */ + + /* + * disallow names consisting only of digits/dots, unless + * they end in a dot. + */ + if (isdigit (name[0]) || (isxdigit (name[0]) || name[0] == ':')) + { + const char *cp; + char *hostname; + struct hostent *host; + typedef unsigned char host_addr_t [16]; + host_addr_t *host_addr; + typedef char *host_addr_list_t [2]; + host_addr_list_t *host_aliases; + host_addr_list_t *h_addr_ptrs; + size_t size_needed; + int addr_size; +#ifndef HAVE_AF + int af = -1; +#endif + + switch (af) + { + case AF_INET: + addr_size = INADDRSZ; + break; + + case AF_INET6: + addr_size = IN6ADDRSZ; + break; + + default: + af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET; + addr_size = (af == AF_INET6 ) ? IN6ADDRSZ : INADDRSZ; + break; + } + + size_needed = (sizeof (*host) + sizeof (*host_addr) + + sizeof (*host_aliases) + sizeof (*h_addr_ptrs) + + strlen (name) + 1); + +#ifdef HAVE_LOOKUP_BUFFER + if (buflen < size_needed) + { + __set_errno (ERANGE); + goto done; + } +#else + if (buffer_size < size_needed) + { + char *new_buf; + buffer_size = size_needed; + new_buf = realloc (buffer, buffer_size); + + if (new_buf == NULL) + { + save = errno; + free (buffer); + buffer = NULL; + buffer_size = 0; + __set_errno (save); + result = (struct hostent *) NULL; + goto done; + } + buffer = new_buf; + } +#endif /* HAVE_LOOKUP_BUFFER */ + + memset (buffer, 0, size_needed); + + host = (struct hostent *) buffer; + host_addr = (host_addr_t *) ((char *) host + sizeof (*host)); + host_aliases = (host_addr_list_t *) + ((char *) host_addr + sizeof (*host_addr)); + h_addr_ptrs = (host_addr_list_t *) + ((char *) host_aliases + sizeof (*host_aliases)); + hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs); + + if (isdigit (name[0])) + { + for (cp = name;; ++cp) + { + if (!*cp) + { + if (*--cp == '.') break; + + /* All-numeric, no dot at the end. Fake up a hostent as if + we'd actually done a lookup. What if someone types + 255.255.255.255? The test below will succeed + spuriously... ??? */ + if (inet_pton (af, name, host_addr) <= 0) + { + __set_h_errno (HOST_NOT_FOUND); +#ifndef HAVE_LOOKUP_BUFFER + result = (struct hostent *) NULL; +#endif + goto done; + } + + strcpy (hostname, name); + host->h_name = hostname; + host->h_aliases = *host_aliases; + (*host_aliases)[0] = NULL; + (*h_addr_ptrs)[0] = (char *)host_addr; + (*h_addr_ptrs)[1] = (char *)0; + host->h_addr_list = *h_addr_ptrs; + if (_res.options & RES_USE_INET6 && af == AF_INET) + { + /* We need to change the IP v4 address into the + IP v6 address. */ + char tmp[INADDRSZ], *p = (char *) host_addr; + int i; + + /* Save a copy of the IP v4 address. */ + memcpy (tmp, host_addr, INADDRSZ); + /* Mark this ipv6 addr as a mapped ipv4. */ + for (i = 0; i < 10; i++) + *p++ = 0x00; + *p++ = 0xff; + *p++ = 0xff; + /* Copy the IP v4 address. */ + memcpy (p, tmp, INADDRSZ); + host->h_addrtype = AF_INET6; + host->h_length = IN6ADDRSZ; + } + else + { + host->h_addrtype = af; + host->h_length = addr_size; + } + __set_h_errno (NETDB_SUCCESS); +#ifdef HAVE_LOOKUP_BUFFER + status = NSS_STATUS_SUCCESS; +#else + result = host; +#endif + goto done; + } + + if (!isdigit (*cp) && *cp != '.') break; + } + } + + if (isxdigit (name[0]) || name[0] == ':') + { + const char *cp; + char *hostname; + struct hostent *host; + typedef unsigned char host_addr_t [16]; + host_addr_t *host_addr; + typedef char *host_addr_list_t [2]; + host_addr_list_t *host_aliases; + host_addr_list_t *h_addr_ptrs; + size_t size_needed; + int addr_size; +#ifndef HAVE_AF + int af = -1; +#endif + + switch (af) + { + case AF_INET: + addr_size = INADDRSZ; + break; + + case AF_INET6: + addr_size = IN6ADDRSZ; + break; + + default: + af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET; + addr_size = (af == AF_INET6 ) ? IN6ADDRSZ : INADDRSZ; + break; + } + + size_needed = (sizeof (*host) + sizeof (*host_addr) + + sizeof (*host_aliases) + sizeof (*h_addr_ptrs) + + strlen (name) + 1); + +#ifdef HAVE_LOOKUP_BUFFER + if (buflen < size_needed) + { + __set_errno (ERANGE); + goto done; + } +#else + if (buffer_size < size_needed) + { + char *new_buf; + buffer_size = size_needed; + new_buf = realloc (buffer, buffer_size); + + if (new_buf == NULL) + { + save = errno; + free (buffer); + __set_errno (save); + buffer = NULL; + buffer_size = 0; + result = (struct hostent *) NULL; + goto done; + } + buffer = new_buf; + } +#endif /* HAVE_LOOKUP_BUFFER */ + + memset (buffer, 0, size_needed); + + host = (struct hostent *) buffer; + host_addr = (host_addr_t *) ((char *) host + sizeof (*host)); + host_aliases = (host_addr_list_t *) + ((char *) host_addr + sizeof (*host_addr)); + h_addr_ptrs = (host_addr_list_t *) + ((char *) host_aliases + sizeof (*host_aliases)); + hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs); + + for (cp = name;; ++cp) + { + if (!*cp) + { + if (*--cp == '.') break; + + /* All-IPv6-legal, no dot at the end. Fake up a + hostent as if we'd actually done a lookup. */ + if (inet_pton (af, name, host_addr) <= 0) + { + __set_h_errno (HOST_NOT_FOUND); +#ifndef HAVE_LOOKUP_BUFFER + result = (struct hostent *) NULL; +#endif + goto done; + } + + strcpy (hostname, name); + host->h_name = hostname; + host->h_aliases = *host_aliases; + (*host_aliases)[0] = NULL; + (*h_addr_ptrs)[0] = (char *) host_addr; + (*h_addr_ptrs)[1] = (char *) 0; + host->h_addr_list = *h_addr_ptrs; + host->h_addrtype = af; + host->h_length = addr_size; + __set_h_errno (NETDB_SUCCESS); +#ifdef HAVE_LOOKUP_BUFFER + status = NSS_STATUS_SUCCESS; +#else + result = host; +#endif + goto done; + } + + if (!isxdigit (*cp) && *cp != ':' && *cp != '.') break; + } + } + } diff --git a/nss/getXXbyYY.c b/nss/getXXbyYY.c index 529864a088..542072be25 100644 --- a/nss/getXXbyYY.c +++ b/nss/getXXbyYY.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -93,6 +93,13 @@ FUNCTION_NAME (ADD_PARAMS) buffer = malloc (buffer_size); } + if (buffer != NULL) + { +#ifdef HANDLE_DIGITS_DOTS +# include "digits_dots.c" +#endif + } + while (buffer != NULL && INTERNAL (REENTRANT_NAME) (ADD_VARIABLES, &resbuf, buffer, buffer_size, &result H_ERRNO_VAR) != 0 @@ -115,6 +122,9 @@ FUNCTION_NAME (ADD_PARAMS) buffer = new_buf; } +#ifdef HANDLE_DIGITS_DOTS +done: +#endif /* Release lock. Preserve error value. */ save = errno; __libc_lock_unlock (lock); diff --git a/nss/getXXbyYY_r.c b/nss/getXXbyYY_r.c index 635023884e..371b2e36f5 100644 --- a/nss/getXXbyYY_r.c +++ b/nss/getXXbyYY_r.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -93,6 +93,10 @@ INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf, char *buffer, int no_more; enum nss_status status = NSS_STATUS_UNAVAIL; +#ifdef HANDLE_DIGITS_DOTS +# include "digits_dots.c" +#endif + if (startp == NULL) { no_more = DB_LOOKUP_FCT (&nip, REENTRANT_NAME_STRING, (void **) &fct); @@ -129,6 +133,9 @@ INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf, char *buffer, (void **) &fct, status, 0); } +#ifdef HANDLE_DIGITS_DOTS +done: +#endif *result = status == NSS_STATUS_SUCCESS ? resbuf : NULL; return status == NSS_STATUS_SUCCESS ? 0 : -1; } |