embox

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/**
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 * @file
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 * @brief
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 *
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 * @date 26.10.2011
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 * @author Anton Kozlov
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 */
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#include <string.h>
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#include <mem/objalloc.h>
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#include <net/l4/udp.h>
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#include <net/l3/ipv4/ip.h>
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#include <net/l2/ethernet.h>
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#include <net/skbuff.h>
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#include <pnet/core/types.h>
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#include <pnet/node/skbuff_match/netfilter/match_lin.h>
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OBJALLOC_DEF(match_rules, struct match_rule, MAX_RULE_COUNT);
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match_rule_t pnet_rule_alloc(void) {
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	struct sk_buff *skb;
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	match_rule_t rule = (match_rule_t) objalloc(&match_rules);
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	/* alloc memory only for header */
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	skb = skb_alloc(MAX_PACK_HEADER_SIZE);
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	rule->skbuf = skb;
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	/* FIXME mac.raw initialized in skb_alloc. I think nh.raw also is uniquely determined.
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	 * But now we initialize it in net/core/net_entry.c. So, temporary I suppose
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	 * that is no initialization of nh in skb_alloc() --Alexander */
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	rule->skbuf->nh.raw = rule->skbuf->mac.raw + ETH_HEADER_SIZE;
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	/* Fill data with 255 per byte. It means '*', i.e. any value is suitable. */
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	memset(rule->skbuf->mac.raw, MATCH_WILDCARD, MAX_PACK_HEADER_SIZE);
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	rule->next_node = NULL;
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	/* All rules and packets have priority 0 after allocation. */
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	rule->priority = 0;
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	INIT_LIST_HEAD(&rule->lnk);
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	return rule;
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}
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void pnet_rule_free(match_rule_t rule) {
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	if (NULL == rule) {
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		return;
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	}
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	skb_free(rule->skbuf);
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	objfree(&match_rules, rule);
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}
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