/*
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* L2 Filter handling functions
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*
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* Copyright (C) 2020, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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*
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* <<Broadcom-WL-IPTag/Dual:>>
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*
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*/
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#ifndef _l2_filter_h_
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#define _l2_filter_h_
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/* Proxy ARP processing return values */
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#define PARP_DROP 0
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#define PARP_NOP 1
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#define PARP_TAKEN 2
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/* Adjust for ETHER_HDR_LEN pull in linux
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* which makes pkt nonaligned
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*/
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#define ALIGN_ADJ_BUFLEN 2
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#define BCM_PARP_TABLE_SIZE 32 /* proxyarp hash table bucket size */
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#define BCM_PARP_TABLE_MASK 0x1f /* proxyarp hash table index mask */
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#define BCM_PARP_TABLE_INDEX(val) (val & BCM_PARP_TABLE_MASK)
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#define BCM_PARP_TIMEOUT 600 /* proxyarp cache entry timerout duration(10 min) */
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#define BCM_PARP_IS_TIMEOUT(pub_tick, entry) \
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(pub_tick - entry->used > BCM_PARP_TIMEOUT)
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#define BCM_PARP_ANNOUNCE_WAIT 2 /* proxyarp announce wait duration(2 sec) */
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#define BCM_PARP_ANNOUNCE_WAIT_REACH(pub_tick, entry) \
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(pub_tick - entry->used > BCM_PARP_ANNOUNCE_WAIT)
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#define BCM_ARP_TABLE_UPDATE_TIMEOUT 100
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/* Taken from wlc_tdls.h for block_tdls iovar */
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#define TDLS_PAYLOAD_TYPE 2
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#define TDLS_PAYLOAD_TYPE_LEN 1
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/* TDLS Action Category code */
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#define TDLS_ACTION_CATEGORY_CODE 12
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typedef struct parp_entry {
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struct parp_entry *next;
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uint32 used; /* time stamp */
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struct ether_addr ea;
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bcm_tlv_t ip;
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} parp_entry_t;
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typedef struct arp_table arp_table_t;
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extern int bcm_l2_filter_gratuitous_arp(osl_t *osh, void *pktbuf);
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extern int bcm_l2_filter_block_ping(osl_t *osh, void *pktbuf);
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extern int bcm_l2_filter_get_mac_addr_dhcp_pkt(osl_t *osh, void *pktbuf,
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int ifidx, uint8** addr);
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arp_table_t* init_l2_filter_arp_table(osl_t* osh);
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void deinit_l2_filter_arp_table(osl_t* osh, arp_table_t* ptable);
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int get_pkt_ether_type(osl_t *osh, void *skb, uint8 **data_ptr,
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int *len_ptr, uint16 *et_ptr, bool *snap_ptr);
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int get_pkt_ip_type(osl_t *osh, void *pktbuf,
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uint8 **data_ptr, int *len_ptr, uint8 *prot_ptr);
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int bcm_l2_filter_parp_addentry(osl_t *osh, arp_table_t* arp_tbl, struct ether_addr *ea,
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uint8 *ip, uint8 ip_ver, bool cached, unsigned int entry_tickcnt);
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int bcm_l2_filter_parp_delentry(osl_t *osh, arp_table_t* arp_tbl, struct ether_addr *ea,
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uint8 *ip, uint8 ip_ver, bool cached);
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parp_entry_t *bcm_l2_filter_parp_findentry(arp_table_t* arp_tbl, uint8 *ip,
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uint8 ip_ver, bool cached, unsigned int entry_tickcnt);
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int bcm_l2_filter_parp_modifyentry(arp_table_t* arp_tbl, struct ether_addr *ea,
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uint8 *ip, uint8 ip_ver, bool cached, unsigned int entry_tickcnt);
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extern void bcm_l2_filter_arp_table_update(osl_t *osh, arp_table_t* arp_tbl, bool all,
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uint8 *del_ea, bool periodic, unsigned int tickcnt);
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void *bcm_l2_filter_proxyarp_alloc_reply(osl_t* osh, uint16 pktlen, struct ether_addr *src_ea,
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struct ether_addr *dst_ea, uint16 ea_type, bool snap, void **p);
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void bcm_l2_filter_parp_get_smac(arp_table_t* ptable, void* smac);
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void bcm_l2_filter_parp_get_cmac(arp_table_t* ptable, void* cmac);
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void bcm_l2_filter_parp_set_smac(arp_table_t* ptable, void* smac);
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void bcm_l2_filter_parp_set_cmac(arp_table_t* ptable, void* cmac);
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bcm_tlv_t* parse_nd_options(void *buf, int buflen, uint key);
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uint16 calc_checksum(uint8 *src_ipa, uint8 *dst_ipa, uint32 ul_len, uint8 prot, uint8 *ul_data);
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extern int bcm_l2_filter_block_tdls(osl_t *osh, void *pktbuf);
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#endif /* _l2_filter_h */
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