diff options
Diffstat (limited to 'nss/digits_dots.c')
| -rw-r--r-- | nss/digits_dots.c | 262 |
1 files changed, 146 insertions, 116 deletions
diff --git a/nss/digits_dots.c b/nss/digits_dots.c index a439207191..d3f2209769 100644 --- a/nss/digits_dots.c +++ b/nss/digits_dots.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1997, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997. @@ -17,15 +17,46 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <assert.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#include <wctype.h> +#include <resolv.h> +#include <netdb.h> +#include <arpa/inet.h> +#include "nsswitch.h" + #ifdef USE_NSCD # define inet_aton __inet_aton +# include <nscd/nscd_proto.h> #endif +int +__nss_hostname_digits_dots (const char *name, struct hostent *resbuf, + char **buffer, size_t *buffer_size, + size_t buflen, struct hostent **result, + enum nss_status *status, int *typep, + int flags, int *afp, int *h_errnop) +{ + int save; + + /* We have to test for the use of IPv6 which can only be done by + examining `_res'. */ + if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1) + { + if (h_errnop) + *h_errnop = NETDB_INTERNAL; + *result = NULL; + return -1; + } + /* * disallow names consisting only of digits/dots, unless * they end in a dot. */ - if (isdigit (name[0]) || (isxdigit (name[0]) || name[0] == ':')) + if (isdigit (name[0]) || isxdigit (name[0]) || name[0] == ':') { const char *cp; char *hostname; @@ -36,13 +67,14 @@ char **h_alias_ptr; size_t size_needed; int addr_size; -#ifdef HAVE_TYPE - int af = type; -#else -# ifndef HAVE_AF - int af = -1; -# endif -#endif + int af; + + if (typep != NULL) + af = *typep; + else if (afp != NULL) + af = *afp; + else + af = -1; switch (af) { @@ -55,56 +87,58 @@ break; default: -#ifdef HAVE_TYPE - /* This must not happen. */ - *h_errnop = HOST_NOT_FOUND; - goto done; -#else - af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET; - addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ; + if (typep != NULL) + { + /* This must not happen. */ + if (h_errnop != NULL) + *h_errnop = HOST_NOT_FOUND; + goto done; + } + else + { + af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET; + addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ; + } break; -#endif } size_needed = (sizeof (*host_addr) + sizeof (*h_addr_ptrs) + strlen (name) + 1); -#ifdef HAVE_LOOKUP_BUFFER - if (buflen < size_needed) - { -# ifdef NEED_H_ERRNO - *h_errnop = TRY_AGAIN; -# endif - __set_errno (ERANGE); - goto done; + if (buffer_size == NULL) + { + if (buflen < size_needed) + { + if (h_errnop != NULL) + *h_errnop = TRY_AGAIN; + __set_errno (ERANGE); + goto done; + } } -#else - if (buffer_size < size_needed) + else if (buffer_size != NULL && *buffer_size < size_needed) { char *new_buf; - buffer_size = size_needed; - new_buf = realloc (buffer, buffer_size); + *buffer_size = size_needed; + new_buf = (char *) realloc (*buffer, *buffer_size); if (new_buf == NULL) { save = errno; - free (buffer); - buffer = NULL; - buffer_size = 0; + free (*buffer); + *buffer = NULL; + *buffer_size = 0; __set_errno (save); -# ifdef NEED_H_ERRNO - *h_errnop = TRY_AGAIN; -# endif - result = (struct hostent *) NULL; + if (h_errnop != NULL) + *h_errnop = TRY_AGAIN; + *result = NULL; goto done; } - buffer = new_buf; + *buffer = new_buf; } -#endif /* HAVE_LOOKUP_BUFFER */ - memset (buffer, 0, size_needed); + memset (*buffer, '\0', size_needed); - host_addr = (host_addr_t *) buffer; + host_addr = (host_addr_t *) *buffer; h_addr_ptrs = (host_addr_list_t *) ((char *) host_addr + sizeof (*host_addr)); h_alias_ptr = (char **) ((char *) h_addr_ptrs + sizeof (*h_addr_ptrs)); @@ -114,7 +148,7 @@ { for (cp = name;; ++cp) { - if (!*cp) + if (*cp == '\0') { int ok; @@ -130,46 +164,40 @@ else { assert (af == AF_INET6); - ok = (inet_pton (af, name, host_addr) > 0); + ok = inet_pton (af, name, host_addr) > 0; } if (! ok) { *h_errnop = HOST_NOT_FOUND; -#ifndef HAVE_LOOKUP_BUFFER - result = (struct hostent *) NULL; -#endif + if (buffer_size) + *result = NULL; goto done; } - resbuf.h_name = strcpy (hostname, name); + resbuf->h_name = strcpy (hostname, name); h_alias_ptr[0] = NULL; - resbuf.h_aliases = h_alias_ptr; - (*h_addr_ptrs)[0] = (char *)host_addr; - (*h_addr_ptrs)[1] = (char *)0; - resbuf.h_addr_list = *h_addr_ptrs; - if ( -#ifdef HAVE_TYPE - type == AF_INET6 -#else - af == AF_INET && (_res.options & RES_USE_INET6) -#endif - ) + resbuf->h_aliases = h_alias_ptr; + (*h_addr_ptrs)[0] = (char *) host_addr; + (*h_addr_ptrs)[1] = NULL; + resbuf->h_addr_list = *h_addr_ptrs; + if ((typep != NULL && *typep == AF_INET6) + || (af == AF_INET + && (_res.options & RES_USE_INET6))) { -#ifdef HAVE_TYPE - if ((flags & AI_V4MAPPED) == 0) + if (typep != NULL && (flags & AI_V4MAPPED) == 0) { /* That's bad. The user hasn't specified that she allows IPv4 numeric addresses. */ - result = NULL; + *result = NULL; *h_errnop = HOST_NOT_FOUND; goto done; } else -#endif { /* We need to change the IP v4 address into the IP v6 address. */ - char tmp[INADDRSZ], *p = (char *) host_addr; + char tmp[INADDRSZ]; + char *p = (char *) host_addr; int i; /* Save a copy of the IP v4 address. */ @@ -181,46 +209,47 @@ *p++ = 0xff; /* Copy the IP v4 address. */ memcpy (p, tmp, INADDRSZ); - resbuf.h_addrtype = AF_INET6; - resbuf.h_length = IN6ADDRSZ; + resbuf->h_addrtype = AF_INET6; + resbuf->h_length = IN6ADDRSZ; } } else { - resbuf.h_addrtype = af; - resbuf.h_length = addr_size; + resbuf->h_addrtype = af; + resbuf->h_length = addr_size; } - *h_errnop = NETDB_SUCCESS; -#ifdef HAVE_LOOKUP_BUFFER - status = NSS_STATUS_SUCCESS; -#else - result = &resbuf; -#endif + if (h_errnop != NULL) + *h_errnop = NETDB_SUCCESS; + if (buffer_size == NULL) + *status = NSS_STATUS_SUCCESS; + else + *result = resbuf; goto done; } - if (!isdigit (*cp) && *cp != '.') break; + if (!isdigit (*cp) && *cp != '.') + break; } } - if ((isxdigit (name[0]) && strchr (name, ':') != NULL) - || name[0] == ':') + if ((isxdigit (name[0]) && strchr (name, ':') != NULL) || name[0] == ':') { const char *cp; char *hostname; - typedef unsigned char host_addr_t [16]; + typedef unsigned char host_addr_t[16]; host_addr_t *host_addr; - typedef char *host_addr_list_t [2]; + typedef char *host_addr_list_t[2]; host_addr_list_t *h_addr_ptrs; size_t size_needed; int addr_size; -#ifdef HAVE_TYPE - int af = type; -#else -# ifndef HAVE_AF - int af = -1; -# endif -#endif + int af; + + if (typep != NULL) + af = *typep; + else if (afp != NULL) + af = *afp; + else + af = -1; switch (af) { @@ -237,7 +266,7 @@ /* This is not possible. We cannot represent an IPv6 address in an `struct in_addr' variable. */ *h_errnop = HOST_NOT_FOUND; - result = NULL; + *result = NULL; goto done; case AF_INET6: @@ -248,39 +277,35 @@ size_needed = (sizeof (*host_addr) + sizeof (*h_addr_ptrs) + strlen (name) + 1); -#ifdef HAVE_LOOKUP_BUFFER - if (buflen < size_needed) + if (buffer_size == NULL && buflen < size_needed) { -# ifdef NEED_H_ERRNO - *h_errnop = TRY_AGAIN; -# endif + if (h_errnop != NULL) + *h_errnop = TRY_AGAIN; __set_errno (ERANGE); goto done; } -#else - if (buffer_size < size_needed) + else if (buffer_size != NULL && *buffer_size < size_needed) { char *new_buf; - buffer_size = size_needed; - new_buf = realloc (buffer, buffer_size); + *buffer_size = size_needed; + new_buf = realloc (*buffer, *buffer_size); if (new_buf == NULL) { save = errno; - free (buffer); + free (*buffer); __set_errno (save); - buffer = NULL; - buffer_size = 0; - result = (struct hostent *) NULL; + *buffer = NULL; + *buffer_size = 0; + *result = NULL; goto done; } - buffer = new_buf; + *buffer = new_buf; } -#endif /* HAVE_LOOKUP_BUFFER */ - memset (buffer, 0, size_needed); + memset (*buffer, '\0', size_needed); - host_addr = (host_addr_t *) buffer; + host_addr = (host_addr_t *) *buffer; h_addr_ptrs = (host_addr_list_t *) ((char *) host_addr + sizeof (*host_addr)); hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs); @@ -297,30 +322,35 @@ if (inet_pton (AF_INET6, name, host_addr) <= 0) { *h_errnop = HOST_NOT_FOUND; -#ifndef HAVE_LOOKUP_BUFFER - result = (struct hostent *) NULL; -#endif + if (buffer_size) + *result = NULL; goto done; } - resbuf.h_name = strcpy (hostname, name); + resbuf->h_name = strcpy (hostname, name); h_alias_ptr[0] = NULL; - resbuf.h_aliases = h_alias_ptr; + resbuf->h_aliases = h_alias_ptr; (*h_addr_ptrs)[0] = (char *) host_addr; (*h_addr_ptrs)[1] = (char *) 0; - resbuf.h_addr_list = *h_addr_ptrs; - resbuf.h_addrtype = AF_INET6; - resbuf.h_length = addr_size; + resbuf->h_addr_list = *h_addr_ptrs; + resbuf->h_addrtype = AF_INET6; + resbuf->h_length = addr_size; *h_errnop = NETDB_SUCCESS; -#ifdef HAVE_LOOKUP_BUFFER - status = NSS_STATUS_SUCCESS; -#else - result = &resbuf; -#endif + if (buffer_size == NULL) + *status = NSS_STATUS_SUCCESS; + else + *result = resbuf; goto done; } - if (!isxdigit (*cp) && *cp != ':' && *cp != '.') break; + if (!isxdigit (*cp) && *cp != ':' && *cp != '.') + break; } } } + + return 0; + +done: + return 1; +} |