/*
?*?communication.c?v2.0?July?2002
?*
?*?Author:?Bart?De?Schuymer
?*
?*/

/*
?*?All?the?userspace/kernel?communication?is?in?this?file.
?*?The?other?code?should?not?have?to?know?anything?about?the?way?the
?*?kernel?likes?the?structure?of?the?table?data.
?*?The?other?code?works?with?linked?lists.?So?the?translation?is?done?here.
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?“include/ebtables_u.h“

extern?char*?hooknames[NF_BR_NUMHOOKS];

#ifdef?KERNEL_64_USERSPACE_32
#define?sparc_cast?（uint64_t）
#else
#define?sparc_cast
#endif

int?sockfd?=?-1;

static?int?get_sockfd（）
{
	int?ret?=?0;
	if?（sockfd?==?-1）?{
		sockfd?=?socket（AF_INET?SOCK_RAW?PF_INET）;
		if?（sockfd?			ebt_print_error（“Problem?getting?a?socket?“
					“you?probably?don‘t?have?the?right?“
					“permissions“）;
			ret?=?-1;
		}
	}
	return?ret;
}

static?struct?ebt_replace?*translate_user2kernel（struct?ebt_u_replace?*u_repl）
{
	struct?ebt_replace?*new;
	struct?ebt_u_entry?*e;
	struct?ebt_u_match_list?*m_l;
	struct?ebt_u_watcher_list?*w_l;
	struct?ebt_u_entries?*entries;
	char?*p?*base;
	int?i?j;
	unsigned?int?entries_size?=?0?*chain_offsets;

	new?=?（struct?ebt_replace?*）malloc（sizeof（struct?ebt_replace））;
	if?（!new）
		ebt_print_memory（）;
	new->valid_hooks?=?u_repl->valid_hooks;
	strcpy（new->name?u_repl->name）;
	new->nentries?=?u_repl->nentries;
	new->num_counters?=?u_repl->num_counters;
	new->counters?=?sparc_cast?u_repl->counters;
	chain_offsets?=?（unsigned?int?*）calloc（u_repl->num_chains?sizeof（unsigned?int））;
	if?（!chain_offsets）
		ebt_print_memory（）;
	/*?Determine?size?*/
	for?（i?=?0;?i?num_chains;?i++）?{
		if?（!（entries?=?u_repl->chains[i]））
			continue;
		chain_offsets[i]?=?entries_size;
		entries_size?+=?sizeof（struct?ebt_entries）;
		j?=?0;
		e?=?entries->entries->next;
		while?（e?!=?entries->entries）?{
			j++;
			entries_size?+=?sizeof（struct?ebt_entry）;
			m_l?=?e->m_list;
			while?（m_l）?{
				entries_size?+=?m_l->m->match_size?+
				???sizeof（struct?ebt_entry_match）;
				m_l?=?m_l->next;
			}
			w_l?=?e->w_list;
			while?（w_l）?{
				entries_size?+=?w_l->w->watcher_size?+
				???sizeof（struct?ebt_entry_watcher）;
				w_l?=?w_l->next;
			}
			entries_size?+=?e->t->target_size?+
			???sizeof（struct?ebt_entry_target）;
			e?=?e->next;
		}
		/*?A?little?sanity?check?*/
		if?（j?!=?entries->nentries）
			ebt_print_bug（“Wrong?nentries:?%d?!=?%d?hook?=?%s“?j
			???entries->nentries?entries->name）;
	}

	new->entries_size?=?entries_size;
	p?=?（char?*）malloc（entries_size）;
	if?（!p）
		ebt_print_memory（）;

	/*?Put?everything?in?one?block?*/
	new->entries?=?sparc_cast?p;
	for?（i?=?0;?i?num_chains;?i++）?{
		struct?ebt_entries?*hlp;

		hlp?=?（struct?ebt_entries?*）p;
		if?（!（entries?=?u_repl->chains[i]））
			continue;
		if?（i?			new->hook_entry[i]?=?sparc_cast?hlp;
		hlp->nentries?=?entries->nentries;
		hlp->poli