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ws2_32: Separate out hostent creation from duplication.

This commit is contained in:
Erich Hoover 2009-12-05 19:26:33 -07:00 committed by Alexandre Julliard
parent 49d40d80f4
commit f9f9566c74
1 changed files with 43 additions and 15 deletions
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58
dlls/ws2_32/socket.c
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@ -282,6 +282,7 @@ static INT num_startup; /* reference counter */
static FARPROC blocking_hook = (FARPROC)WSA_DefaultBlockingHook;
/* function prototypes */
static struct WS_hostent *WS_create_he(char *name, int aliases, int addresses);
static struct WS_hostent *WS_dup_he(const struct hostent* p_he);
static struct WS_protoent *WS_dup_pe(const struct protoent* p_pe);
static struct WS_servent *WS_dup_se(const struct servent* p_se);
@ -4459,33 +4460,60 @@ static int list_dup(char** l_src, char** l_to, int item_size)
/* ----- hostent */
/* create a hostent entry
*
* 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.
*/
static struct WS_hostent *WS_create_he(char *name, int aliases, int addresses)
{
struct WS_hostent *p_to;
char *p;
int size = (sizeof(struct WS_hostent) +
strlen(name) + 1 +
sizeof(char *)*aliases +
sizeof(char *)*addresses);
if (!(p_to = check_buffer_he(size))) return NULL;
memset(p_to, 0, size);
p = (char *)(p_to + 1);
p_to->h_name = p;
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;
}
return p_to;
}
/* duplicate hostent entry
* and handle all Win16/Win32 dependent things (struct size, ...) *correctly*.
* Ditto for protoent and servent.
*/
static struct WS_hostent *WS_dup_he(const struct hostent* p_he)
{
char *p;
int addresses = list_size(p_he->h_addr_list, p_he->h_length);
int aliases = list_size(p_he->h_aliases, 0);
struct WS_hostent *p_to;
int size = (sizeof(*p_he) +
strlen(p_he->h_name) + 1 +
list_size(p_he->h_aliases, 0) +
list_size(p_he->h_addr_list, p_he->h_length));
p_to = WS_create_he(p_he->h_name, aliases, addresses);
if (!(p_to = check_buffer_he(size))) return NULL;
if (!p_to) return NULL;
p_to->h_addrtype = p_he->h_addrtype;
p_to->h_length = p_he->h_length;
p = (char *)(p_to + 1);
p_to->h_name = p;
strcpy(p, p_he->h_name);
p += strlen(p) + 1;
p_to->h_aliases = (char **)p;
p += list_dup(p_he->h_aliases, p_to->h_aliases, 0);
p_to->h_addr_list = (char **)p;
list_dup(p_he->h_aliases, p_to->h_aliases, 0);
list_dup(p_he->h_addr_list, p_to->h_addr_list, p_he->h_length);
return p_to;
}