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Code Issues Releases Activity

- Remove padding for ABI compatibility of n_net member from struct

Browse Source 
netent.
- Change 1st argument of getnetbyaddr() to an uint32_t on 64 bit
  arch as well to confirm to POSIX-2001.

These changes break ABI compatibility on 64 bit arch.
There is similar padding issue for ai_addrlen of struct addrinfo.
However, it is leaved as is for now.

Discussed on:	arch@, standards@ and current@
X-MFC after:	never
This commit is contained in:
Hajimu UMEMOTO 2005-06-03 03:32:06 +00:00
parent 8fb36271ea
commit ad0fab44e2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=146904
5 changed files with 1 additions and 38 deletions
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21
include/netdb.h
View File

@ -105,28 +105,11 @@ struct hostent {
#define h_addr h_addr_list[0] /* address, for backward compatibility */
};
/*
* Note: n_net used to be an unsigned long integer.
* In XNS5, and subsequently in POSIX-2001 it was changed to an
* uint32_t.
* To accomodate for this while preserving binary compatibility with
* the old interface, we prepend or append 32 bits of padding,
* depending on the (LP64) architecture's endianness.
*
* This should be deleted the next time the libc major number is
* incremented.
*/
struct netent {
char *n_name; /* official name of net */
char **n_aliases; /* alias list */
int n_addrtype; /* net address type */
#if __LONG_BIT == 64 && _BYTE_ORDER == _BIG_ENDIAN
uint32_t __n_pad0; /* ABI compatibility */
#endif
uint32_t n_net; /* network # */
#if __LONG_BIT == 64 && _BYTE_ORDER == _LITTLE_ENDIAN
uint32_t __n_pad0; /* ABI compatibility */
#endif
};
struct servent {
@ -262,11 +245,7 @@ struct hostent *gethostbyname2(const char *, int);
struct hostent *gethostent(void);
struct hostent *getipnodebyaddr(const void *, size_t, int, int *);
struct hostent *getipnodebyname(const char *, int, int, int *);
#if __LONG_BIT == 64
struct netent *getnetbyaddr(unsigned long, int); /* ABI compatibility */
#else
struct netent *getnetbyaddr(uint32_t, int);
#endif
struct netent *getnetbyname(const char *);
struct netent *getnetent(void);
int getnetgrent(char **, char **, char **);

6
lib/libc/net/getnetbydns.c
View File

@ -259,9 +259,6 @@ getnetanswer(querybuf *answer, int anslen, int net_i, struct netent *ne,
break;
}
ne->n_aliases++;
#if __LONG_BIT == 64
ne->__n_pad0 = 0; /* ABI compatibility */
#endif
return 0;
}
h_errno = TRY_AGAIN;
@ -334,9 +331,6 @@ _dns_getnetbyaddr(void *rval, void *cb_data, va_list ap)
while ((net & 0xff) == 0 && net != 0)
net >>= 8;
ne->n_net = net;
#if __LONG_BIT == 64
ne->__n_pad0 = 0; /* ABI compatibility */
#endif
return NS_SUCCESS;
}
return NS_NOTFOUND;

3
lib/libc/net/getnetbyht.c
View File

@ -122,9 +122,6 @@ getnetent_r(struct netent *ne, struct netent_data *ned)
if (p != NULL)
*p++ = '\0';
ne->n_net = inet_network(cp);
#if __LONG_BIT == 64
ne->__n_pad0 = 0; /* ABI compatibility */
#endif
ne->n_addrtype = AF_INET;
q = ne->n_aliases = ned->net_aliases;
if (p != NULL) {

3
lib/libc/net/getnetbynis.c
View File

@ -99,9 +99,6 @@ _getnetbynis(const char *name, char *map, int af, struct netent *ne,
cp++;
ne->n_net = inet_network(cp);
#if __LONG_BIT == 64
ne->__n_pad0 = 0; /* ABI compatibility */
#endif
ne->n_addrtype = AF_INET;
q = ne->n_aliases = ned->net_aliases;

6
lib/libc/net/getnetnamadr.c
View File

@ -165,17 +165,13 @@ getnetbyname(const char *name)
}
struct netent *
#if __LONG_BIT == 64
getnetbyaddr(u_long addr, int af) /* ABI compatibility */
#else
getnetbyaddr(uint32_t addr, int af)
#endif
{
struct netdata *nd;
if ((nd = __netdata_init()) == NULL)
return NULL;
if (getnetbyaddr_r((uint32_t)addr, af, &nd->net, &nd->data) != 0)
if (getnetbyaddr_r(addr, af, &nd->net, &nd->data) != 0)
return NULL;
return &nd->net;
}