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ws2_32: Fix allocating a hostent with no h_aliases list.

This commit is contained in:
Erich Hoover 2009-12-14 08:30:14 -07:00 committed by Alexandre Julliard
parent d4383b4498
commit 896af79093
1 changed files with 22 additions and 18 deletions
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32
dlls/ws2_32/socket.c
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@ -3639,7 +3639,11 @@ static struct WS_hostent* WS_get_local_ips( char *hostname )
/* Allocate a hostent and enough memory for all the IPs,
* including the NULL at the end of the list.
*/
hostlist = WS_create_he(hostname, 0, numroutes, TRUE);
hostlist = WS_create_he(hostname, 1, numroutes+1, TRUE);
if (hostlist == NULL)
goto cleanup; /* Failed to allocate a hostent for the list of IPs */
hostlist->h_addr_list[numroutes] = NULL; /* NULL-terminate the address list */
hostlist->h_aliases[0] = NULL; /* NULL-terminate the alias list */
hostlist->h_addrtype = AF_INET;
hostlist->h_length = sizeof(struct in_addr); /* = 4 */
/* Reorder the entries when placing them in the host list, Windows expects
@ -4602,9 +4606,14 @@ static int list_dup(char** l_src, char** l_to, int item_size)
*
* Creates the entry with enough memory for the name, aliases
* addresses, and the address pointers. Also copies the name
* and sets up all the pointers. If "fill_address" is set then
* and sets up all the pointers. If "fill_addresses" is set then
* sufficient memory for the addresses is also allocated and the
* address pointers are set to this memory.
*
* NOTE: The alias and address lists must be allocated with room
* for the NULL item terminating the list. This is true even if
* the list has no items ("aliases" and "addresses" must be
* at least "1", a truly empty list is invalid).
*/
static struct WS_hostent *WS_create_he(char *name, int aliases, int addresses, int fill_addresses)
{
@ -4616,11 +4625,9 @@ static struct WS_hostent *WS_create_he(char *name, int aliases, int addresses, i
sizeof(char *)*aliases +
sizeof(char *)*addresses);
/* Place addresses in the allocated memory, making sure to have enough
* room for the NULL at the end of the list.
*/
/* Allocate enough memory for the addresses */
if (fill_addresses)
size += sizeof(struct in_addr)*(addresses+1);
size += sizeof(struct in_addr)*addresses;
if (!(p_to = check_buffer_he(size))) return NULL;
memset(p_to, 0, size);
@ -4630,24 +4637,21 @@ static struct WS_hostent *WS_create_he(char *name, int aliases, int addresses, i
strcpy(p, name);
p += strlen(p) + 1;
if (aliases != 0)
{
p_to->h_aliases = (char **)p;
p += sizeof(char *)*aliases;
}
if (addresses != 0)
{
p_to->h_addr_list = (char **)p;
p += sizeof(char *)*addresses;
}
if (fill_addresses)
{
int i;
/* Fill in the list of address pointers and NULL-terminate the list*/
/* NOTE: h_aliases must be filled in manually, leave these
* pointers NULL (already set to NULL by memset earlier).
*/
/* Fill in the list of address pointers */
for (i = 0; i < addresses; i++)
p_to->h_addr_list[i] = (p += sizeof(struct in_addr));
p_to->h_addr_list[i] = NULL;
p += sizeof(struct in_addr);
}
return p_to;