x25: use limited socket backlog
[linux-2.6.git] / net / netfilter / xt_repldata.h
1 /*
2  * Today's hack: quantum tunneling in structs
3  *
4  * 'entries' and 'term' are never anywhere referenced by word in code. In fact,
5  * they serve as the hanging-off data accessed through repl.data[].
6  */
7
8 #define xt_alloc_initial_table(type, typ2) ({ \
9         unsigned int hook_mask = info->valid_hooks; \
10         unsigned int nhooks = hweight32(hook_mask); \
11         unsigned int bytes = 0, hooknum = 0, i = 0; \
12         struct { \
13                 struct type##_replace repl; \
14                 struct type##_standard entries[nhooks]; \
15                 struct type##_error term; \
16         } *tbl = kzalloc(sizeof(*tbl), GFP_KERNEL); \
17         if (tbl == NULL) \
18                 return NULL; \
19         strncpy(tbl->repl.name, info->name, sizeof(tbl->repl.name)); \
20         tbl->term = (struct type##_error)typ2##_ERROR_INIT;  \
21         tbl->repl.valid_hooks = hook_mask; \
22         tbl->repl.num_entries = nhooks + 1; \
23         tbl->repl.size = nhooks * sizeof(struct type##_standard) + \
24                          sizeof(struct type##_error); \
25         for (; hook_mask != 0; hook_mask >>= 1, ++hooknum) { \
26                 if (!(hook_mask & 1)) \
27                         continue; \
28                 tbl->repl.hook_entry[hooknum] = bytes; \
29                 tbl->repl.underflow[hooknum]  = bytes; \
30                 tbl->entries[i++] = (struct type##_standard) \
31                         typ2##_STANDARD_INIT(NF_ACCEPT); \
32                 bytes += sizeof(struct type##_standard); \
33         } \
34         tbl; \
35 })