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Diffstat (limited to 'nis/nss_nisplus/nisplus-hosts.c')
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c197
1 files changed, 110 insertions, 87 deletions
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
index e6d584dac8..0fdeb8f3f1 100644
--- a/nis/nss_nisplus/nisplus-hosts.c
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -44,72 +44,14 @@ static nis_name *names = NULL;
/* Get implementation for some internal functions. */
#include "../../resolv/mapv4v6addr.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 (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;
-
- STRING_FIELD (result->h_name, isspace, 1);
- }
-)
-
-
static int
-_nss_nisplus_parse_hostent (nis_result *result, struct hostent *host,
+_nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
char *buffer, size_t buflen)
{
- char *p = buffer;
- size_t room_left = buflen;
- int parse_res;
unsigned int i;
- struct parser_data *data = (void *) buffer;
+ char *first_unused = buffer;
+ size_t room_left = buflen;
+ char *data, *p, *line;
if (result == NULL)
return 0;
@@ -121,43 +63,117 @@ _nss_nisplus_parse_hostent (nis_result *result, struct hostent *host,
result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 4)
return 0;
- memset (p, '\0', room_left);
-
- /* Generate the hosts entry format and use the normal parser */
- if (NISENTRYLEN (0, 2, result) + 1 > room_left)
+ if (room_left < NISENTRYLEN (0, 2, result) + 1)
{
__set_errno (ERANGE);
return 0;
}
- strncpy (p, NISENTRYVAL (0, 2, result),
- NISENTRYLEN (0, 2, result));
- room_left -= (NISENTRYLEN (0, 2, result) + 1);
+
+ data = first_unused;
+ if (inet_pton (af, NISENTRYVAL (0, 2, result), data) < 1)
+ /* Illegal address: ignore line. */
+ return 0;
+
+ host->h_addrtype = af;
+ if (af == AF_INET6)
+ host->h_length = IN6ADDRSZ;
+ else
+ {
+ if (_res.options & RES_USE_INET6)
+ {
+ map_v4v6_address (data, data);
+ host->h_addrtype = AF_INET6;
+ host->h_length = IN6ADDRSZ;
+ }
+ else
+ {
+ host->h_addrtype = AF_INET;
+ host->h_length = INADDRSZ;
+ }
+ }
+ first_unused+=host->h_length;
+ room_left-=host->h_length;
if (NISENTRYLEN (0, 0, result) + 1 > room_left)
{
__set_errno (ERANGE);
return 0;
}
- strcat (p, "\t");
- strncat (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
+ p = stpncpy (first_unused, NISENTRYVAL (0, 0, result),
+ NISENTRYLEN (0, 0, result));
+ *p = '\0';
room_left -= (NISENTRYLEN (0, 0, result) + 1);
- /* + 1: We overwrite the last \0 */
+ host->h_name = first_unused;
+ first_unused += NISENTRYLEN (0, 0, result) +1;
+ p = first_unused;
- for (i = 1; i < result->objects.objects_len; i++)
+ line = p;
+ for (i = 0; i < result->objects.objects_len; i++)
{
- if (NISENTRYLEN (i, 1, result) + 1 > room_left)
+ if (strcmp (NISENTRYVAL (i, 1, result), host->h_name) != 0)
+ {
+ if (NISENTRYLEN (i, 1, result) + 2 > room_left)
+ {
+ __set_errno (ERANGE);
+ return 0;
+ }
+ p = stpcpy(p, " ");
+ p = stpncpy (p, NISENTRYVAL (i, 1, result),
+ NISENTRYLEN (i, 1, result));
+ *p = '\0';
+ room_left -= (NISENTRYLEN (i, 1, result) + 1);
+ }
+ }
+ ++p;
+ first_unused = p;
+ /* Adjust the pointer so it is aligned for
+ storing pointers. */
+ first_unused += __alignof__ (char *) - 1;
+ first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
+ host->h_addr_list = (char **) first_unused;
+ if (room_left < 2 * sizeof (char *))
+ {
+ __set_errno (ERANGE);
+ return 0;
+ }
+ room_left -= (2 * sizeof (char *));
+ host->h_addr_list[0] = data;
+ host->h_addr_list[1] = NULL;
+ host->h_aliases = &host->h_addr_list[2];
+ host->h_aliases[0] = NULL;
+
+ i = 0;
+ while (*line != '\0')
+ {
+ /* Skip leading blanks. */
+ while (isspace (*line))
+ line++;
+
+ if (*line == '\0')
+ break;
+
+ if (room_left < sizeof (char *))
{
__set_errno (ERANGE);
return 0;
}
- strcat (p, " ");
- strcat (p, NISENTRYVAL (i, 1, result));
- room_left -= (NISENTRYLEN (i, 1, result) + 1);
+
+ room_left -= sizeof (char *);
+ host->h_aliases[i] = line;
+
+ while (*line != '\0' && *line != ' ')
+ line++;
+
+ if (line != host->h_aliases[i])
+ {
+ *line = '\0';
+ line++;
+ i++;
+ }
}
- parse_res = parse_line (p, host, data, buflen);
+ return 1;
- return parse_res;
}
enum nss_status
@@ -249,7 +265,11 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
}
}
- parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+ parse_res = _nss_nisplus_parse_hostent (result, AF_INET6,
+ host, buffer, buflen);
+ if (!parse_res && errno != ERANGE)
+ parse_res = _nss_nisplus_parse_hostent (result, AF_INET, host,
+ buffer, buflen);
if (!parse_res && errno == ERANGE)
{
*herrnop = NETDB_INTERNAL;
@@ -326,7 +346,8 @@ _nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
return retval;
}
- parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+ parse_res =
+ _nss_nisplus_parse_hostent (result, af, host, buffer, buflen);
nis_freeresult (result);
@@ -360,19 +381,20 @@ _nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
}
enum nss_status
-_nss_nisplus_gethostbyaddr_r (const char *addr, struct hostent *host,
- char *buffer, size_t buflen, int *herrnop)
+_nss_nisplus_gethostbyaddr_r (const char *addr, int addrlen, int type,
+ struct hostent *host, char *buffer,
+ size_t buflen, int *herrnop)
{
if (addr == NULL)
return NSS_STATUS_NOTFOUND;
else
{
nis_result *result;
- char buf[24 + strlen (addr)];
+ char buf[1025];
int retval, parse_res;
- sprintf(buf, "[addr=%s],hosts.org_dir", addr);
-
+ snprintf(buf, sizeof (buf) -1, "[addr=%s],hosts.org_dir",
+ inet_ntoa (*(struct in_addr *)addr));
result = nis_list(buf, EXPAND_NAME, NULL, NULL);
retval = niserr2nss (result->status);
@@ -387,7 +409,8 @@ _nss_nisplus_gethostbyaddr_r (const char *addr, struct hostent *host,
return retval;
}
- parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+ parse_res = _nss_nisplus_parse_hostent (result, type, host,
+ buffer, buflen);
nis_freeresult (result);
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 21:07:05 +0000